Method for manufacturing member angular joined by synchronous stirror joining, and synchronous stirror joining apparatus for

Abstract

The present invention does not require an auxiliary tool, is unlikely to be restricted by joining conditions, and can easily and quickly perform corner joining while suppressing roughness and disorder in a plastic flow portion. A method for manufacturing a corner-joined member, the method including a corner joining step for corner-joining two members to be joined, the corner joining step being performed by a synchronous stirring joining device, the synchronous stirring joining device having: an output shaft; a drive mechanism configured to rotate the output shaft; and a pin part which is provided on the tip side of the output shaft, is configured so as to be rotated by rotation transmitted from the drive mechanism, and is inserted into the two members to be joined during synchronous stirring, the pin part having a clearance between the output shaft and the pin part, the clearance being a gap or substantially a gap, the clearance being capable of vibrating the pin part with respect to the output shaft, and the pin part being inserted into the two members to be joined during synchronous stirring. The pin portion is configured so as to be free or substantially free with respect to the output shaft in the range of the play, and in the corner joining step, the rotating pin portion is inserted into the two members to be joined at an inner corner of a corner formed by the two members to be joined, whereby corner joining is performed by synchronous stir joining.

Description

Technical Field

[0001] This invention relates to Synchronized Stir Welding (SSW), and more particularly, to a method for manufacturing components for corner joining by synchronized stir welding and a synchronized stir welding apparatus for corner joining. Background Technology

[0002] Patent documents 1 through 5 all involve corner joints using friction stir welding (FSW).

[0003] Patent Document 1 relates to a friction stir bonding probe for avoiding unevenness or defects in corner welding. A pressure block in the shape of an inverted isosceles triangular prism, a probe body, and a stirring pin are used to perform friction stir bonding on the corners of the materials to be joined. The pressure block supports the stirring pin while applying pressure to the plastic flow portion to prevent unevenness or deformation.

[0004] Patent Document 2 relates to a tool for frictionally stirring and joining the corner portions of a pair of metal parts. The tool consists of a stirring pin and a base block. The base block has a narrow body and a detachable shoulder. This structure allows for efficient replacement of worn parts of the tool and reduces overall cost. Similar to the pressure block in Patent Document 1, the base block supports the stirring pin while applying pressure to the plastic flow portion.

[0005] Patent Document 3 relates to a friction stirring joining tool for corner joining using friction stirring joining. The friction stirring joining tool has a friction stirring rotor and a friction stirring stator. The friction stirring rotor has a friction stirring probe and a friction stirring body. The friction stirring rotor also has a shoulder that connects the friction stirring probe and the friction stirring body and slopes outward from the center of the friction stirring body 12. During friction stirring joining, the rotating friction stirring probe is pressed into the parts to be joined, stirring the parts. The rotating shoulder protrudes from the slit of the friction stirring stator and abuts against the parts to be joined, stirring the parts. The friction stirring stator is configured to stabilize the joining by applying pressure to the plastic flow portion. Both sides of the slit (i.e., both sides of the line contact position between the shoulder and the parts to be joined in the circumferential direction of the shoulder) are covered by the friction stirring stator, thus spatially enclosing it. On both sides of the slit, the friction stirring stator also stabilizes the joining by applying pressure to the plastic flow portion.

[0006] Patent document 4 relates to a friction stirring and joining device for friction stirring and joining diagonal wall portions. The friction stirring and joining device is configured to apply pressure to the plastic flow portion by means of a fixed shoulder while performing friction stirring and joining by means of a stirring shaft.

[0007] Patent Document 5 relates to a technique for friction stirring bonding of a T-shaped structure. The T-shaped structure is constructed by joining a second part to be joined with a first part in an upright position. The T-shaped structure has a first corner wall and a second corner wall on both sides of the upright second part. In this technique, a softened material on the first corner wall side is supported by a fixed shoulder, thus maintaining the rounded corner shape at the first corner wall while the second part is joined to the first part. Meanwhile, a pressure roller presses down on the second corner wall. This maintains the rounded corner shape at the second corner wall.

[0008] As described above, the pressure block in Patent Document 1, the base block in Patent Document 2, the friction stirring stator in Patent Document 3, the fixed shoulder in Patent Document 4, and the fixed shoulder in Patent Document 5 are auxiliary tools specifically designed for corner wall welding via friction stirring engagement. These auxiliary tools are configured such that, when a rotating stirring pin moves along the corner wall and performs friction stirring engagement on the corner wall, they move along the corner wall together with the stirring pin and abut against the joint after friction stirring engagement to apply pressure.

[0009] Existing technical documents Patent documents Patent Document 1: Japanese Patent Application Publication No. 11-320128 Patent Document 2: Japanese Patent Application Publication No. 2011-79031 Patent Document 3: Japanese Patent Application Publication No. 2011-206786 Patent Document 4: Japanese Patent Application Publication No. 2013-166159 Patent Document 5: Japanese Patent Application Publication No. 2020-131256 Summary of the Invention

[0010] The problem the invention aims to solve The purpose of this invention is to provide a method and apparatus that does not require auxiliary tools, is not easily constrained by the joining conditions, and can easily and quickly suppress roughness and disorder in the plastic flow portion and stably perform corner joining.

[0011] means for solving problems The inventors of this invention have conducted in-depth research on the above-mentioned issues and have obtained the following insights.

[0012] Previously, in corner joints using synchronous stirring, the approach to jointing methods has been to focus on suppressing roughness and disorder on the surface of the plastic flow portion using the aforementioned auxiliary tools. However, since the auxiliary tool moves while applying pressure to the plastic flow portion, it inevitably produces drag marks known as scratches on the plastic flow portion. Therefore, the auxiliary tool needs to be designed to minimize scratch formation. Specifically, the auxiliary tool needs to be designed according to the shape, material, and internal corner shape of the parts being joined, resulting in the need for specialized equipment like the aforementioned auxiliary tool.

[0013] Furthermore, the auxiliary tool settings need to be highly precise to suppress scratches, which presents challenges in terms of both the setting process and the time required. Additionally, since frictional mixing and bonding occur while the auxiliary tool is being dragged, the bonding speed cannot be increased, and this further restricts bonding speed, especially when considering scratch suppression.

[0014] Furthermore, friction stir bonding can easily cause the temperature of the plastic flow portion to rise. During friction stir bonding, the surface of the plastic flow portion is covered by an auxiliary tool, and the plastic flow portion is dragged by the auxiliary tool. Therefore, temperature problems are particularly prone to occur in corner joints performed by friction stir bonding, and sometimes this can also restrict the bonding conditions such as the material of the joined parts, the rotation speed of the stirring pin, or the insertion depth.

[0015] In response, the inventors of this invention have shifted from conventional thinking and attempted corner joining through synchronous stirring. Synchronous stirring joining is a technique disclosed, for example, in Japanese Patent Nos. 7445355, 7526535, 7526536, and 7526537. Furthermore, the disclosures of Japanese Patent Nos. 7445355, 7526535, 7526536, and 7526537 are incorporated herein by reference.

[0016] As a result of the above attempts, the inventors of the present invention discovered that the discharge pressure of the plastic flow component generated by synchronous stirring is sufficiently low compared to friction stirring, thereby suppressing the spread of flash. Furthermore, the inventors of the present invention discovered that by utilizing the lower discharge pressure of the plastic flow component generated by synchronous stirring, corner joining can be performed without the need for auxiliary tools, thus completing the present invention. This insight is completely different from the conventional friction stirring. Moreover, the aforementioned patent publication did not disclose the lower discharge pressure of the plastic flow component generated by synchronous stirring, nor did it disclose corner joining. That is, the aforementioned patent publication did not disclose or provide any guidance on using the lower discharge pressure of the plastic flow component generated by synchronous stirring for corner joining. Therefore, even those skilled in the art would find it difficult to readily conceive of this insight from the prior art. In the present invention, the following configuration can be adopted.

[0017] (1) A method for manufacturing a component that is corner-jointed by synchronous stirring, characterized in that, The manufacturing method includes a corner joining process that joins two parts together at the corners. The corner joining process is carried out by a synchronous stirring and joining device. The synchronous stirring and joining device includes: an output shaft; a drive mechanism configured to rotate the output shaft; and a pin disposed at the front end of the output shaft, configured to rotate by rotation transmitted from the drive mechanism, and inserted into the two joined components during synchronous stirring. The pin has a clearance between the output shaft and the pin, which allows the pin to vibrate relative to the output shaft. This clearance is either a gap or substantially a gap, allowing the pin to be free or substantially free relative to the output shaft within the range of this clearance. In the corner joining process, the rotating pin is inserted into the two joined parts at the inner angle of the angle formed by the two joined parts, thereby performing corner joining by synchronous stirring.

[0018] According to the manufacturing method of (1), corner jointing is performed by synchronous stirring, taking advantage of the lower discharge pressure of the plastic flow component generated by synchronous stirring. Therefore, the spread of flash can be suppressed. Therefore, even without the use of auxiliary tools, the roughness and disorder of the surface of the plastic flow portion can be suppressed. By performing synchronous stirring without the use of auxiliary tools, the generation of scratches can be suppressed. There is no need to precisely set the auxiliary tools, and synchronous stirring can be performed quickly. Since synchronous stirring is not performed while dragging the auxiliary tools, the joining speed can be increased. Since the rise in joining temperature can also be suppressed, the joining conditions such as the material of the joined parts, the rotation speed of the stirring pin, and the insertion depth are not easily restricted. Therefore, according to the manufacturing method of (1), corner jointing can be performed easily and quickly while suppressing the roughness and disorder of the plastic flow portion, without the need for auxiliary tools and without being restricted by joining conditions.

[0019] Conventionally, as shown in Patent Documents 1-5, in corner joints achieved through friction stirring, it was considered that without the use of an auxiliary tool to fix the shoulder, it was impossible to suppress the surface roughness and disorder of the plastic flow portion. Therefore, research and development were specifically conducted regarding the design and usage methods of the auxiliary tool. This invention overcomes this technical bias, enabling the suppression of surface roughness and disorder of the plastic flow portion even without the use of an auxiliary tool.

[0020] Furthermore, auxiliary tools have been used in the past to suppress surface roughness and disorder in the plastic flow portion, but as mentioned above, using auxiliary tools causes many problems. While there has been a desire to suppress surface roughness and disorder in the plastic flow portion without the use of auxiliary tools, this has been a persistent technical challenge. The present invention solves this previously desired technical problem. Additionally, the method for manufacturing components that are corner-jointed by synchronous stirring can also be described as a corner-jointing method using synchronous stirring.

[0021] The "clearance" allows the pin to vibrate relative to the output shaft. The pin can be configured such that, through the clearance, its vibration has a larger amplitude and / or frequency than the output shaft's vibration during synchronous stirring. The output shaft of the drive mechanism vibrates during synchronous stirring as the rotation from the drive mechanism is transmitted. This vibration is also called the fundamental vibration. The fundamental vibration is the vibration that inevitably occurs during synchronous stirring. The pin is configured such that, during synchronous stirring, its vibration has a larger amplitude and / or frequency than the fundamental vibration. The pin can be configured such that, within the clearance range, it moves and rotates in a manner that conforms to the plastic flow of the joined component, rather than resisting it. This action generates pin vibration. That is, the pin vibration is generated by the clearance. The pin vibration is not generated by the output of a drive source other than the drive mechanism. The pin vibration is unlikely to impede the plastic flow of the joined component. Furthermore, the pin vibration can be synchronized with the plastic flow of the joined component. Thus, the pin vibration can amplify the plastic flow of the joined component. Therefore, by vibrating the pin, the occurrence of joint defects can be suppressed and a high-strength joint can be achieved. In addition, the tilt angle (forward tilt angle) of the output shaft can also be 0 degrees. Even with a tilt angle of 0 degrees, good synchronous stirring joint can be achieved. Since the vibration of the pin can be achieved through clearance, a complex spindle mechanism is not required. Excessive frictional heat generation can be suppressed. Excessive friction applied to the pin can be suppressed. By vibrating the pin, the transmission of vibration from the downstream side to the upstream side of the clearance in the power transmission path from the drive mechanism to the pin can be suppressed. The load applied to the output shaft can be reduced. In addition, in the above (1), the lower discharge pressure of the plastic flow component generated by synchronous stirring joint is utilized.

[0022] The synchronous stirring and joining device is not limited to a dedicated device for synchronous stirring and joining. For example, it can also be a machining center, robot, milling machine, multi-functional machining center, general-purpose equipment, or a movable device with dimensions that allow the user to perform synchronous stirring and joining by hand. There are no particular limitations. The control conditions (position, load, spindle load, heat, pressure, etc.) of the synchronous stirring and joining device or its auxiliary mechanisms are also not particularly limited. The joining conditions (feed speed, rotational speed, joining temperature, advance angle) are also not particularly limited. The material of the joined parts is not particularly limited. The joined parts can be of the same type of material or different types of material. In the embodiments described later, the clearance is set by a key (fitting key or fixing key), but is not limited to this example. The structure used to set the clearance is not particularly limited, and conventionally known structures can be used. In addition to keys, bolts, pins, spheres, etc., can also be used as components for setting the clearance. In addition, the clearance itself can be set according to the shape of the rotating part for synchronous stirring. The rotating part for synchronous stirring can also be divided into multiple (e.g., 2) parts, and the clearance is formed by the fitting of adjacent parts. The amplitude and frequency of the vibration are not particularly limited and can be adjusted by changing the amount of clearance or the weight of the component downstream of the clearance in the power transmission path from the drive mechanism to the pin. For example, the weight can be changed by setting a counterweight. In the engagement device, the drive mechanism includes a rotary machine. For example, the rotary machine can be a rotary electric motor or an internal combustion engine. The drive mechanism may also include a transmission that changes the speed of rotation output from the rotary machine. The transmission can be a reducer or a speed increaser. When the drive mechanism includes a transmission, the output shaft of the transmission is equivalent to the output shaft of the drive mechanism. When the drive mechanism does not include a transmission, the output shaft of the rotary machine is equivalent to the output shaft of the drive mechanism. In one embodiment, backlash and allowance in the drive mechanism are not considered clearance. In one embodiment, clearance is provided downstream of the upstream edge of the output shaft of the drive mechanism in the power transmission path from the drive mechanism to the pin.

[0023] The gap is the space between the output shaft and the pin. Essentially, the gap refers to the space that can contain liquid or elastomer, provided that the amplitude and / or frequency of the pin's vibration during synchronous stirring is greater than the vibration of the output shaft.

[0024] Freedom refers to a state free from physical or mechanical constraints. Furthermore, substantial freedom refers to the degree to which the amplitude and / or frequency of the pin's vibration during synchronous stirring is greater than the vibration of the output shaft. If this range is within which constraint on the output shaft by the front end is permitted, this constraint could be, for example, friction between adjacent components between the output shaft and the pin, or external stress caused by elastomers or fluids, as described later.

[0025] The manufacturing method of (2) and (1), The synchronous stirring assembly includes a rotating component for synchronous stirring, which is mounted on the output shaft and includes the pin or is configured to detachably mount the pin. The synchronous stirring rotating component is configured such that, when mounted on the output shaft, a clearance is generated between the output shaft and the pin that allows the pin to vibrate relative to the output shaft.

[0026] According to the manufacturing method of (2), similar to (1) above, no auxiliary tools are required, it is not easily restricted by the joining conditions, and corner joining can be carried out stably and quickly while suppressing the roughness and disorder of the plastic flow part.

[0027] The rotating component for synchronous stirring can itself have clearance. Alternatively, the rotating component can be configured such that clearance exists between the rotating component and the output shaft by mounting the rotating component on the output shaft. Or, the rotating component can be configured without a pin, with clearance existing between the rotating component and the pin by mounting a pin on the rotating component.

[0028] (3) Manufacturing method of (1) or (2), The pin is configured such that, through the clearance, the vibration of the pin during synchronous stirring has a larger amplitude and / or frequency than the vibration of the output shaft.

[0029] According to the manufacturing method of (3), the discharge pressure of the plastic flow component generated by synchronous stirring can be suppressed to a low level. Therefore, no auxiliary tools are required, and it is not easily restricted by the joining conditions. Corner joining can be carried out stably and quickly while suppressing the roughness and disorder of the plastic flow part.

[0030] The manufacturing method of any one of (4) (1) to (3), The pin is configured such that, within the clearance range, it passively vibrates through contact with the plastic flow components in the two joined parts.

[0031] According to the manufacturing method of (4), during synchronous stirring, the pin moves and rotates in a compliant manner within the clearance range, rather than resisting the plastic flow component. As a result, the discharge pressure of the plastic flow component generated by synchronous stirring can be suppressed to a low level. Therefore, no auxiliary tools are required, and it is not easily restricted by the joining conditions. Corner joining can be performed easily and quickly while suppressing the roughness and disorder of the plastic flow part.

[0032] The manufacturing method of any one of (5) (1) to (4), The pin is configured such that, through the clearance, vibration of the pin occurs in at least one of the axial, circumferential, and radial directions.

[0033] According to the manufacturing method of (5), the discharge pressure of the plastic flow component generated by synchronous stirring can be suppressed to a low level. Therefore, no auxiliary tools are required, and it is not easily restricted by the joining conditions. Corner joining can be carried out stably and quickly while suppressing the roughness and disorder of the plastic flow part.

[0034] When a clearance is provided between the output shaft and the pin in the axial direction, the pin can vibrate in the axial direction. When a clearance is provided in the circumferential direction, the pin can vibrate in the circumferential direction. When a clearance is provided in the radial direction, the pin can vibrate radially. The clearance is provided in at least one direction of the pin: the axial direction, the circumferential direction, and the radial direction. For example, the following clearances can be provided between the output shaft and the pin.

[0035] (A) Clearance only in the axial direction, (B) Only circumferential clearance, (C) Radial clearance only, (D) The combination of axial clearance and circumferential clearance. (E) The combination of axial clearance and radial clearance. (F) A combination of circumferential clearance and radial clearance, or (G) A combination of axial clearance, circumferential clearance and radial clearance.

[0036] In the case of (A) above, the pin can vibrate at least in the axial direction.

[0037] In the case of (B) above, the pin can at least vibrate in the circumferential direction.

[0038] In the case of (C) above, the pin can vibrate at least radially.

[0039] In the case of (D) above, the pin can vibrate at least in the axial direction and the circumferential direction.

[0040] In the case described above (E), the pin is able to vibrate at least in the axial direction and radial direction.

[0041] In the case described above (F), the pin is able to vibrate at least in the circumferential and radial directions.

[0042] In the case described above (G), the pin can vibrate in the axial direction, circumferential direction, and radial direction.

[0043] The amount of clearance in any direction is not particularly limited and varies depending on the size of the coupling device, for example, preferably 0.0001mm to 1mm, more preferably 0.001mm to 0.8mm, and even more preferably 0.01mm to 0.5mm.

[0044] The manufacturing method of any one of (6)(1) to (5), The corner joining process is a process of corner joining by synchronous stirring without the use of auxiliary tools. The auxiliary tools are configured not to rotate with the pin, but to apply pressure to the plastic flow generated in the two joined parts at the inner corner by synchronous stirring.

[0045] According to the manufacturing method of (6), since no auxiliary tools are used, scratches can be suppressed. Synchronous stirring and bonding can be performed quickly. Bonding speed can be increased. Bonding temperature rise can be suppressed. It is less affected by bonding conditions. Corner bonding can be performed easily and quickly while suppressing roughness and turbulence in the plastic flow region, and is stable.

[0046] The manufacturing method of any one of (7) (1) to (6), On the base end side of the pin, an enlarged diameter portion is provided in a manner connected to the pin, the enlarged diameter portion being configured to satisfy at least one of the following two requirements: (i) its diameter is larger than that of the pin; and (ii) as the diameter increases toward the base end side... In the corner joining process, the rotating pin is inserted into the two joined parts at the inner angle of the angle formed by the two joined parts in such a manner that either of the following conditions is met, thereby performing corner joining by synchronous stirring: (iii) the plastic flow generated in the two joined parts at the inner angle by synchronous stirring does not make line contact with the side of the enlarged part; or (iv) the plastic flow makes line contact with the enlarged part in a spatially open manner on both sides of the line contact position between the plastic flow and the enlarged part in the circumferential direction of the enlarged part.

[0047] In (iii), the plastic flow portion and the side of the expanded diameter portion do not make line contact, thus creating an open space between them. In (iv), since the spaces on both sides of the line contact position are open, an open space is also created between them. In such an environment, proper corner joining cannot be achieved by friction stirring. Therefore, in Patent Documents 1-5, auxiliary tools are used to perform friction stirring joining in a closed environment. As a result, many problems arise due to the auxiliary tools. In response, according to the manufacturing method of (7), since corner joining is performed by synchronous stirring joining, in both (iii) and (iv), even with an open space in the environment, a high-quality corner joining with a good appearance and suppressed defects can be achieved stably while more effectively suppressing the roughness and turbulence of the plastic flow portion. Compared to (iv), (iii) has a better appearance and can achieve a higher quality corner joining. Compared to (iii), (iv) can achieve a high-quality corner joining with a good appearance and suppressed defects even when the joined parts vibrate. That is, it can be said to have higher stability.

[0048] The expansion portion is provided in a manner that connects to the base end side of the pin. However, at the point where the expansion portion connects to the pin, if the diameter of the expansion portion is larger than the diameter of the pin, a step will be generated at the point where the expansion portion connects to the pin. The front end face of the expansion portion at this step corresponds to a shoulder. As described above, it is preferable to satisfy either (iii) or (iv), but the "shoulder (front end face of the expansion portion)" may or may not contact the plastic flow portion. By synchronous stirring and joining, the discharge pressure of the plastic flow component during corner joining can be suppressed, thus reducing the size of the shoulder (front end face of the expansion portion). For example, the ratio of the diameter of the shoulder (front end face of the expansion portion) to the diameter of the base end side of the pin can also be 1.8 or less. In other words, the shoulder can be formed to a smaller extent to satisfy this ratio, or it may not be formed at all. The area of ​​the shoulder in contact with the plastic flow portion is reduced. It is less likely to cause a situation where the shoulder obstructs the plastic flow. Synchronous stirring and joining can be performed at a lower temperature. Synchronous stirring and joining at low temperatures can suppress the influence of temperature on the joined parts. Therefore, it is possible to suppress heat-induced deformation and stress generation, potentially improving the mechanical properties of the joined parts. Furthermore, by reducing the temperature of the synchronous stirring joint, energy consumption can be suppressed. It may also be possible to use materials that are difficult to join at high temperatures as joined parts.

[0049] The above ratio is not particularly limited, but is preferably 1.8 or less, more preferably 1.5 or less, even more preferably 1.3 or less, and particularly preferably 1.1 or less. This is because it can suppress the occurrence of the situation where the shoulder hinders plastic flow. When the above ratio is 1.0, no shoulder is formed. The method of not forming a shoulder is also one of the preferred embodiments of the rotating member for synchronous stirring. The above ratio may also be less than 2.0, for example. In addition, the above ratio may also be 2 or more. In addition, as the shoulder, a fixed shoulder that does not rotate with the pin may also be used, but the fixed shoulder is equivalent to the above-mentioned auxiliary tool. According to the synchronous stirring engagement, corner engagement can be performed well even without the use of auxiliary tools.

[0050] The manufacturing methods of (8) and (7), The enlarged diameter portion is configured to at least satisfy the requirement of (ii). The taper angle of the expanded diameter portion has an angle less than or equal to the angle formed by the two joined components. In the corner joining process, the rotating pin is inserted into the two joined parts at the inner corner of the corner formed by the two joined parts in such a way that the plastic flow generated by the synchronous stirring joining at the inner corner does not contact the side of the diameter expansion part, thereby performing corner joining by synchronous stirring joining.

[0051] According to the manufacturing method of (8), corner joints can be stably performed while more effectively suppressing roughness and disorder in the plastic flow section.

[0052] The manufacturing method of any one of (9) (1) to (8), In the corner joining process, the rotating pin is inserted into the two joined parts at the inner angle of the angle formed by the two joined parts, and then moved along the inner angle, thereby performing corner joining by synchronous stirring.

[0053] According to the manufacturing method of (9), it is possible to stably expand the corner joints achieved by the excellent synchronous stirring joints as described above.

[0054] The manufacturing method of any one of (10) (1) to (9) The manufacturing method further includes a configuration step, in which the two parts to be joined are configured before the corner joining step, such that the two parts to be joined form the corner, and the pin can be inserted into the two parts to be joined at the inner corner of the corner during the corner joining step.

[0055] According to the manufacturing method of (10), a configuration process is performed before the corner joining process, in which the two joined parts are configured to satisfy the following two requirements (I) and (II).

[0056] (I) The two joined parts form the angle.

[0057] (II) In the corner joining process, the pin can be inserted into the two joined parts at the inner corner of the corner. As a result, the excellent corner joining by synchronous stirring as described above can be performed smoothly.

[0058] (11) A synchronous stirring and joining device for corner joints, comprising: Output shaft; The drive mechanism is configured to rotate the output shaft; A pin, located on the front end side of the output shaft, is configured to rotate by the rotation transmitted from the drive mechanism and insert into the two joined parts during synchronous stirring. A retaining mechanism holds the two engaged components; and The moving mechanism changes the relative position of the pin and the two engaged components. The pin has a clearance between the output shaft and the pin, which allows the pin to vibrate relative to the output shaft. This clearance is either a gap or substantially a gap, allowing the pin to be free or substantially free relative to the output shaft within the range of this clearance. The moving mechanism is configured to insert the rotating pin into the two joined parts at the inner angle of the angle formed by the two joined parts, thereby performing angular joining by synchronous stirring.

[0059] According to the synchronous stirring and joining device of (11), corner joining is performed by taking advantage of the lower discharge pressure of the plastic flow component generated by synchronous stirring and joining. As a result, the synchronous stirring and joining device of (11) does not require auxiliary tools, is not easily restricted by the joining conditions, and can easily and quickly perform corner joining stably while suppressing the roughness and turbulence of the plastic flow part.

[0060] (12) (11) The synchronous stirring and joining device, It also includes a rotating component for synchronous stirring, which is disposed on the output shaft and includes the pin portion. The synchronous stirring rotating component is configured such that, when mounted on the output shaft, a clearance is generated between the output shaft and the pin that allows the pin to vibrate relative to the output shaft.

[0061] According to the synchronous stirring and joining device of (12), similarly to (11) above, no auxiliary tools are required, it is not easily restricted by the joining conditions, and it can easily and quickly perform corner joining while suppressing the roughness and disorder of the plastic flow part.

[0062] (13) (11) or (12) synchronous stirring and joining device, The pin is configured such that, through the clearance, the vibration of the pin during synchronous stirring has a larger amplitude and / or frequency than the vibration of the output shaft.

[0063] According to the synchronous stirring and joining device of (13), the discharge pressure of the plastic flow component generated by synchronous stirring and joining can be suppressed to a low level. Therefore, no auxiliary tools are required, and it is not easily restricted by the joining conditions. It can easily and quickly perform corner joining while suppressing the roughness and disorder of the plastic flow part.

[0064] The synchronous stirring and joining device described in any one of (14) (11) to (13), The pin is configured such that, within the clearance range, it passively vibrates through contact with the plastic flow components in the two joined parts.

[0065] According to the synchronous stirring and joining device of (14), the discharge pressure of the plastic flow component generated by synchronous stirring and joining can be suppressed to a low level. Therefore, no auxiliary tools are required, and it is not easily restricted by the joining conditions. It can easily and quickly perform corner joining while suppressing the roughness and disorder of the plastic flow part.

[0066] The synchronous stirring and joining device described in any one of (15) (11) to (14), The pin is configured such that, through the clearance, vibration of the pin occurs in at least one of the axial, circumferential, and radial directions.

[0067] According to the synchronous stirring and joining device of (15), the discharge pressure of the plastic flow component generated by synchronous stirring and joining can be suppressed to a low level. Therefore, no auxiliary tools are required, and it is not easily restricted by the joining conditions. It can easily and quickly perform corner joining while suppressing the roughness and disorder of the plastic flow part.

[0068] The synchronous stirring and joining device described in any one of (16) (11) to (15), The synchronous stirring and joining device does not include an auxiliary tool configured not to rotate with the pin, but to apply pressure to the plastic flow generated in the two joined parts at the inner corner by the synchronous stirring and joining.

[0069] According to the synchronous stirring and joining device of (16), since no auxiliary tools are used, the generation of scratches can be suppressed. Synchronous stirring and joining can be performed quickly. Joining speed can be increased. The rise in joining temperature can be suppressed. It is not easily restricted by joining conditions. Corner joining can be performed stably and easily and quickly while suppressing roughness and turbulence in the plastic flow section.

[0070] The synchronous stirring and joining device described in any one of (17) (11) to (16), On the base end side of the pin, an enlarged diameter portion is provided in a manner connected to the pin, the enlarged diameter portion being configured to satisfy at least one of the following two requirements: (i) its diameter is larger than that of the pin; and (ii) as the diameter increases toward the base end side... The moving mechanism is configured to insert the rotating pin into the two joined parts at the inner angle of the angle formed by the two joined parts in such a way as to satisfy any of the following requirements, thereby performing angular joining by synchronous stirring joining, the requirement being: (iii) the plastic flow generated in the two joined parts at the inner angle by synchronous stirring joining does not make line contact with the side of the expanded diameter part; or (iv) the plastic flow makes line contact with the expanded diameter part in a spatially open manner on both sides of the position where the plastic flow makes line contact with the expanded diameter part in the circumferential direction.

[0071] According to the synchronous stirring and joining device of (17), since corner joining is performed by synchronous stirring and joining, both (iii) and (iv) can achieve high-quality corner joining with good appearance and suppression of defects while more effectively suppressing roughness and turbulence in the plastic flow section, even in the presence of an open space in the environment. Compared with (iv), (iii) has a better appearance and can achieve higher quality corner joining. Compared with (iii), (iv) can achieve high-quality corner joining with good appearance and suppression of defects even when the joined parts vibrate. That is, it can be said that the stability is higher.

[0072] (18) and (17) synchronous stirring and joining device, The enlarged diameter portion is configured to at least satisfy the requirement of (ii). The taper angle of the expanded diameter portion has an angle less than or equal to the angle formed by the two joined components. The moving mechanism is configured such that the plastic flow generated in the two joined parts at the inner corner by synchronous stirring does not contact the side of the expanded diameter part, thereby performing corner joining by synchronous stirring.

[0073] According to the synchronous stirring and joining device of (18), corner joining can be performed stably while suppressing the roughness and disorder of the plastic flow section more effectively.

[0074] The synchronous stirring and connecting device described in any one of (19) (11) to (18), The moving mechanism is configured such that, with the rotating pin inserted into the two joined parts at the inner angle of the angle formed by the two joined parts, it moves along the inner angle, thereby performing angular joining by synchronous stirring.

[0075] According to the synchronous stirring and joining device of (19), it is possible to stably expand the excellent angular joining performed by synchronous stirring and joining as described above.

[0076] The synchronous stirring and joining device described in any one of (20), (11) to (19), The retaining mechanism is configured to configure and retain the two joined parts such that the two joined parts form the angle, and the moving mechanism is capable of inserting the pin into the two joined parts at the inner angle of the angle.

[0077] According to the synchronous stirring and joining device of (20), the excellent corner joining by synchronous stirring and joining as described above can be performed smoothly.

[0078] (21) A component for corner joining by synchronous stirring, said component being manufactured by any one of the manufacturing methods of (1) to (10) or by any one of the synchronous stirring joining apparatuses of (11) to (20).

[0079] (21) The components are manufactured using high-strength and high-quality corner joints, and are therefore preferably applicable to a variety of uses.

[0080] (22) and (21) are components that are joined by synchronous stirring. The components that are joined by synchronous stirring are applicable to any type of transportation, including automobiles, railway vehicles, aircraft, ships, and rockets.

[0081] (22) The components are manufactured with high-strength and high-quality corner joints, and are therefore particularly suitable for use in these harsh environments.

[0082] (23) and (21) are components that are joined by synchronous stirring. The components that are corner-jointed by synchronous stirring are applied to any one of the following: electrode components, air conditioning equipment, water-cooled or air-cooled power control units, water-cooled or air-cooled battery boxes, door panels, shock absorbers, suspension links, waveguides, antennas, motor covers, brewing tanks, vacuum device components, sputtering targets, and embedded heaters.

[0083] (23) The components are manufactured with high-strength and high-quality corner joints, and are therefore particularly suitable for use in these harsh environments.

[0084] The component that is corner-jointed by synchronous stirring as described in any one of (24) (21) to (23), The component that is corner-jointed by synchronous stirring is a component manufactured by corner-jointing two components of different thicknesses by synchronous stirring, or a component manufactured by corner-jointing two components made of different materials by synchronous stirring.

[0085] Based on the superior corner jointing achieved through synchronous stirring described above, the occurrence of joint defects can be suppressed and a high-strength joint can be achieved. Therefore, high-quality corner jointing can be performed on multiple plates of varying thicknesses or different types of materials. The resulting joined parts are manufactured using high-strength and high-quality corner jointing. Different types of materials can also be combined in the following ways: for example, combinations of different types of metals, combinations of resin and metal, combinations of metal castings and metal ductile materials, and combinations of ceramics and metals. Furthermore, at least one of the different types of materials can also be one of the following: for example, copper-aluminum dissimilar thin film materials, Ti-based materials, iron-based materials, chromium-based materials, and rare metal bonding. The rare metals mentioned here may include Ag and Au, or may not.

[0086] In this invention, the following structures may also be employed. Furthermore, the following structures were originally implicitly or implicitly included in this invention, but are explicitly described below.

[0087] (22-1) The joining component of 21 is applied to spacecraft, special vehicles, bicycles, special defense vehicles, defense equipment, linear motors, linear locomotives, and unmanned aerial vehicles. Examples of spacecraft include artificial satellites, space stations, manned spacecraft, space probes, space telescopes, space cargo ships, space shuttles, and interplanetary probes. Examples of special vehicles include self-propelled construction machinery such as truck cranes and trailer-mounted vehicles. Examples of bicycles include city bicycles, electric-assisted bicycles, sports bicycles, and special bicycles for off-road or racing purposes. In the joining component of (21), the occurrence of joining defects is suppressed, and a high-strength joint is achieved; therefore, the joining component of (21) is preferably used for applications in harsh environments as shown in (22-1).

[0088] (22-2) The joining component of 21 is applied to equipment, apparatus or machine used in the following fields: food and beverage, liquid crystal / electronics / semiconductors, energy, power generation, batteries, solar cells, infrastructure, construction, building, medical, vacuum, materials, equipment, machinery, metal / resin molding, home appliances, communications, IT, digital. In the joining component of (21), the occurrence of joining defects is suppressed and a high-strength joint is achieved, therefore the joining component of (21) is preferably used in a wide range of fields including those shown in (22-2).

[0089] (23-1) Applied to, or constituting as, any of the following 21 joint components: aluminum / aluminum alloy products, copper / copper alloy products, magnesium / magnesium alloy products, iron / iron alloy products, resin products, extruded materials, drawn materials, cast materials, forged materials, sprayed / sprayed materials, molded materials, metal products, dissimilar material joint products, thin film materials, busbars, busbars, silver / silver alloy products, gold / gold alloy products, titanium / titanium alloy products.

[0090] (23-2) A mating component of 21 applied to any of the following: chamber, vacuum chamber, backplate, water-cooled plate, temperature control plate, radiator, nozzle, valve, base, ion implantation equipment, mobile phone, smartphone, charger, battery, Wi-Fi device, electrical appliance, household product, television, game console, washing machine, refrigerator, clock, digital watch, decorative component, ornament, tableware, kitchen knife, scissors, ball, glasses, baseball bat, electronic device, camera.

[0091] (23-3) 21 joint components applied to any of the following: inverter housing, frame, body, chassis components, door, door panel, floor panel, ceiling panel, inner panel, outer panel, stack box, crank arm, waveguide, antenna, motor, gear, muffler, electrical installation components, oil pan, motor cover, honeycomb panel, double-layer panel, custom material, fuselage panel, wing component, bridge, bridge stringer, bridge, wheelchair, turbine, blade, converter, battery pack housing, wheelchair, accelerator, brake, drive shaft, bumper, bumper beam, spoiler, collision box, saddle, crankcase, engine hood, antenna cover, cladding material, battery coil material, roller, bearing, shaft support, beam guide, heat shield.

[0092] (23-4) A joint component of 21 applied to any of the following: gas storage tank, gas generator, fuel tank, brewing tank, hydrogen tank, gasoline tank, nuclear energy container, solvent tank, sonar, thermal power generator, hydropower generator, wind power generator, nuclear energy generator, ion implantation device, film forming device, etching device, coating device, agricultural machinery, construction machinery, machine tool, industrial machinery, pump / compressor, textile machinery, office machinery, superconducting device, neutron device, exposure device.

[0093] (23-5) A joint component of 21 applied to any of the following: syringes, catheters, medical devices, stents, clamps, knives, scaffolding, window frames, exterior walls, interior walls, roofs, interior decorations, piping, chairs, tables, desks, beds, sofas, cabinets.

[0094] (23-6) 21 joint components applied to any of the following: capacitors, dryers, fishing tackle (fishing reels), musical instruments, microwave ovens, air conditioners, electric fans, personal computers, forklifts, tractors, excavators, bulldozers, robotic arms, flanges, tracks, hydraulic cylinders, presses, suspensions, pedals, handlebars, guardrails, pipes, engine blocks, transmissions, pantographs, fences, handrails, landing gear, railway tracks, signal lights, electronic displays, level crossings, drive shafts, pipes, ventilation fans, suitcases, briefcases, ladders, indicators, aluminum trays, bathtubs, support frames, cooling layers, distributors, synthesizers, internal wiring, robotic arms, mechanical arms, shells, capsules, valves, detectors, missiles.

[0095] In this invention, the "clearance" can be defined in the following ways. Furthermore, the following methods were originally implicitly or implicitly included in this invention, but are explicitly described below.

[0096] In the embodiments described later and the above description, the clearance is (I) provided using components such as keys, but it can also be (II) provided by a fitting shape, or (III) a combination of the methods in (I) and (II) above. Furthermore, in the following text, it is assumed that component A on the output shaft side and component B on the pin side are adjacent to each other, and a clearance is provided between component A and component B. Furthermore, components A and B are not particularly limited. Also, the structure from the output shaft to the pin is not particularly limited; it can be output shaft-retainer-clamp-tool-pin, output shaft-retainer-tool-pin, or output shaft-clamp-tool-pin. The tool and pin can also be integrated. The clamp and retainer can also be integrated. The following examples can be applied to any of these methods.

[0097] (I) Clearance set using connecting components such as keys In this configuration, a connecting component is positioned between components A and B. Components A and B can be located at any position: upstream (e.g., output shaft and retainer), intermediate (e.g., retainer and tool), or downstream (e.g., tool and pin). Alternatively, components such as the retainer, chuck, and tool can be separated between the output shaft side and the pin side, with a connecting component positioned between these components to create clearance. Furthermore, in the embodiments described later and in the above description, a key is used as the connecting component, but pins or bolts can also be used. A key is positioned along the axial direction of the output shaft between the components on the inner diameter side and the components on the outer diameter side. That is, keyways are formed on each component on both the inner and outer diameter sides, and a key smaller than the keyway size is placed in these keyways to create clearance. The key is not particularly limited, and examples include: parallel keys with a quadrilateral (rectangular or square) cross-section; wedge keys (triangular keys) with a tapered shape tapering radially; crescent keys with a semi-circular cross-section; circular keys with a cylindrical cross-section; elliptical keys; polygonal keys with more than pentagonal shapes; rhomboid keys; and other irregularly shaped keys (e.g., T-shaped keys, fan-shaped keys). Regarding the shape along the axial direction, there are no particular limitations, and examples include: straight keys with a fixed cross-sectional shape in the axial direction; stepped keys where the size of the cross-sectional shape changes in a stepwise manner in the axial direction; and tapered keys where the size of the cross-sectional shape gradually changes in the axial direction. Furthermore, spherical bodies can be used as connecting components, either in place of keys or together with keys. Multiple spherical bodies can be arranged in a manner that arranges them in the keyway (ball spline). The dimensional difference between the key and the keyway is set in at least one of the radial, circumferential, and axial directions. This creates clearance that allows the pin to vibrate in that direction. The pin or bolt is configured to pass through both the inner diameter side component and the outer diameter side component along the radial direction of the output shaft. For example, in either the outer diameter side or the inner diameter side component, a hole with a diameter larger than the diameter of the pin or bolt is formed in one of the components, allowing the pin or bolt to be vertically positioned radially along the output shaft to pass through the hole, thereby creating clearance. The dimensional difference between the pin or bolt and the hole is provided in at least one of the radial, circumferential, and axial directions. This creates clearance that allows the pin to vibrate in that direction.

[0098] (II) Clearance set by the interlocking shape (spline) In this case, the engagement, similar to (I) above, can be located at any position on the upstream, middle, or downstream side. Components such as retainers, collets, and tools can be separated between the output shaft side and the pin side, forming an engagement on these components, thereby creating clearance. The spline can be provided along the entire circumference or a portion of it. The spline shape is not particularly limited; examples include: square splines (square grooves), round splines (round grooves), angular splines (V-grooves), sawtooth splines, involute splines, and involute sawtooth splines. The dimensional differences of these engagements are provided in at least one of the radial, circumferential, and axial directions. This creates clearance that allows the pin to vibrate in that direction.

[0099] (III) The clearance produced by the combination of the methods in (I) and (II) above. Clearance can also be formed through a combination of connecting components and fittings. Clearance can also be formed through any combination of upstream, intermediate, and downstream sides. Furthermore, clearance can be formed through combinations of these elements. Clearance can be located in multiple positions.

[0100] The effects of the invention According to the present invention, no auxiliary tools are required, it is not easily restricted by the joining conditions, it can easily and quickly suppress the roughness and disorder of the plastic flow portion, and it can stably perform corner joining. Attached Figure Description

[0101] Figure 1 (a) in Figure 1 (c) is a schematic cross-sectional view showing the manufacturing method of this embodiment. Figure 1 (d) in Figure 1 (j) in the figure is a cross-sectional view that schematically shows the configuration of the two joined components in this embodiment. Figure 1 (k) in Figure 1 (p) is a side view that schematically shows the pin portion of this embodiment.

[0102] Figure 2 (a) is a schematic cross-sectional view showing the rotating component for synchronous stirring according to the first embodiment. Figure 2 (b) is its sectional view along line AA.

[0103] Figure 3 (a) to Figure 3 In the diagram, (t) represents a schematic cross-sectional view of the rotating component for synchronous stirring in the modified example.

[0104] Figure 4 (a) is a schematic cross-sectional view showing the rotating component for synchronous stirring according to the second embodiment. Figure 4 (b) is a perspective view of a rotating component for synchronous stirring, schematically showing a modified example thereof.

[0105] Figure 5 (a) is a schematic cross-sectional view showing the rotating component for synchronous stirring according to the third embodiment. Figure 5 (b) and Figure 5 (c) is a perspective view of a rotating component for synchronous stirring, schematically showing a modified example thereof. Detailed Implementation

[0106] Figure 1 (a) in Figure 1(c) is a cross-sectional view used to illustrate the corner joining process included in the manufacturing method of this embodiment. Figure 1 In (c) shown in the diagram, AD, CD, and RD represent the axial direction, circumferential direction, and radial direction, respectively. These directions are... Figure 1 (a) in Figure 1 (c) is common to all.

[0107] The corner joining process is a process of joining two parts 2a and 2b at an angle, wherein the two parts 2a and 2b are set in a manner that forms an angle α. Figure 1 (a)). The joined parts 2a and 2b are plate-shaped. However, they are not limited to plate-shaped bodies. Angle α is typically a right angle or substantially a right angle. Here, "substantially" means that allowable shape errors of the joined parts or errors in the setting of the joined parts, etc. Angle α is not particularly limited as long as it is less than 180°. Angle α is preferably 45° or more and 135° or less, more preferably 60° or more and 120° or less, and even more preferably 75° or more and 105° or less.

[0108] The corner joining process is performed by the synchronous stirring and joining device 3. The synchronous stirring and joining device 3 is as follows: Figures 2-5 As shown, it has an output shaft 5, a drive mechanism 4, and a pin 21. The drive mechanism 4 is configured to rotate the output shaft 5. The pin 21 is provided on the front end side of the output shaft 5. The pin 21 is inserted into the two joined parts 2a and 2b during synchronous stirring. The pin 21 has clearances AP and CP between the output shaft 5 and the pin 21, which allow the pin 21 to vibrate relative to the output shaft 5. The clearances AP and CP are gaps or substantially gaps. Through the clearances AP and CP, the pin 21 is configured to be free or substantially free relative to the output shaft 5 within the range of the clearances AP and CP. The pin 21 is configured to rotate by rotation transmitted from the drive mechanism 4. In addition, in Figure 1 In (b), pin 21 is depicted, but output shaft 5 and drive mechanism 4 are not depicted, nor are clearances AP and CP. Pin 21 is as follows... Figure 1 As shown in (b), the interior angle towards angle α (the abutting position of the two joined parts 2a and 2b).

[0109] An enlarged diameter portion 24 is provided on the base end side of the pin portion 21 in a manner connected to the pin portion 21. The enlarged diameter portion 24 is configured to satisfy (ii) of the following two requirements: (i) its diameter is larger than that of the pin portion 21; and (ii) its diameter increases towards the base end side. The cone angle β of the enlarged diameter portion 24 is 90°, the same as angle α. Figure 1 (b) in the middle.

[0110] In the corner joining process, the pin 21, which rotates around the axis CA in the circumferential direction CD, is inserted into the two joined parts 2a and 2b at the inner angle of the angle α formed by the two joined parts 2a and 2b, thereby performing corner joining by synchronous stirring. Figure 1 (c) in the middle.

[0111] like Figure 1 As shown in (c), pin 21 is inserted into the plastic flow portion PF. The side of the expanded diameter portion 24 does not contact the plastic flow portion PF. The side of the expanded diameter portion 24 does not contact either of the joined parts 2a or 2b. Figures 2-5 As shown, the pin 21 is configured to have clearance AV and CV between the output shaft 5 and the pin 21, allowing the pin 21 to vibrate relative to the output shaft 5. The vibrations AV and CV of the pin 21 have a larger amplitude and / or frequency than those of the output shaft 5. The diameter expansion portion 24 can be configured to not contact the plastic flow portion PF when the vibrations AV and CV of the pin 21 are not generated, or it can be configured to not contact the joined parts 2a and 2b. Figure 1 In the state shown in (c), the pin 21 is positioned along the direction of the interior angle α. Figure 1 The (c) in the middle moves in the direction of front-inside, thereby enabling corner jointing. Since this corner jointing is carried out by synchronous stirring, no auxiliary tools are required, it is not easily restricted by the jointing conditions, and it can easily and quickly suppress the roughness and turbulence of the plastic flow part PF, and perform corner jointing stably.

[0112] exist Figure 1 (a) in Figure 1 In the example shown in (c), the two joined parts 2a and 2b are configured as a corner joint. However, the configuration of the two joined parts 2a and 2b is not particularly limited. For example, a T-joint can be cited. Figure 1 (d) in the middle), lap joint ( Figure 1 (e)). Alternatively, a gasket joint can also be used. Figure 1 (f) in the text. Additionally, corner joints are not limited to, for example... Figure 1 (a) in Figure 1 As shown in (c), the two joined parts 2a and 2b abut in the vertical direction, for example, as... Figure 1 As shown in (g) above, the two joined parts 2a and 2b can also be joined in a horizontal direction. Additionally, as shown in... Figure 1 (h) in Figure 1 (i) and Figure 1As shown in (j), the method of machining the abutting portions of the two joined parts 2a and 2b and then corner-joining them at those abutting portions is also part of the corner-joining process of the present invention. Furthermore, the machined shape of the abutting portions is not limited to... Figure 1 (h) in Figure 1 (i) and Figure 1 The shape shown in (j) is used. In the pad joint, two joined parts 2a and 2b are corner-jointed by synchronous stirring, and two joined parts 2b and 2c are corner-jointed by synchronous stirring. In this way, by combining the corner joints performed by synchronous stirring at two joined parts, it is possible to manufacture a part in which three or more joined parts are corner-jointed by synchronous stirring. Similarly, it is also possible to... Figure 1 The T-shaped joint assembly shown in (d) serves as a cross joint. Corner joining processes typically involve two joined parts, but sometimes can involve three or more. Even when corner joining is performed with three or more joined parts using synchronous stirring, it still includes corner joining with two joined parts using synchronous stirring; therefore, this process falls under the category of corner joining processes.

[0113] In addition to the corner joining process, the manufacturing method of this embodiment may also include a configuration process for configuring the two joined components 2a and 2b. In the configuration process, the two joined components 2a and 2b are configured such that they form an angle α, and in the corner joining process, the pin 21 can be inserted into the two joined components 2a and 2b at the inner angle of angle α (see reference). Figure 1 (a) in the embodiment). The manufacturing method of this embodiment may also include other steps.

[0114] exist Figure 1 (a) in Figure 1 In the example shown in (f), a plate-like body is used as the joined component. The joined component is typically a plate-like body. However, the shape of the joined component is not limited to this example. From the viewpoint of shape, examples of joined components include: tubular bodies, rod-like bodies, H-shaped, I-shaped, L-shaped, and other shapes with specific cross-sectional shapes; polygonal bodies such as cubes or cuboids; and conical bodies with tapered shapes. Plate-like bodies are not limited to flat plates. Examples include: curved plates, corrugated plates, perforated plates (punched plates), embossed plates (textured plates), grid-like plates (gratings), composite plates, conical plates with varying thickness, and ribbed plates. Tubular and rod-like bodies are not limited to straight shapes; they can also be curved. Furthermore, the joined component can be hollow or solid.

[0115] The shape of pin 21 is not limited to Figure 1(b) ~ Figure 1 The shape shown in (c) is an example. For instance, it can be... Figure 1 (k) in Figure 1 It has a shape like (n) in the diagram.

[0116] exist Figure 1 In the synchronous stirring and joining device 3 shown in (k), a plurality of diameter-expanding sections 24 are provided on the base end side of the pin 21. The diameter-expanding sections 24 are configured such that the diameter-expanding sections 24 near the base end have a larger diameter than the diameter-expanding sections 24 at the front end. Furthermore, each diameter-expanding section 24 itself is configured such that its diameter is larger the closer it is to the base end. The cone angle β is greater than the angle α, but the diameter-expanding sections 24 are configured not to contact the two joined parts 2a and 2b during synchronous stirring.

[0117] exist Figure 1 In the synchronous stirring coupling device 3 shown in (l), an enlarged diameter portion 24 is provided on the base end side of the pin portion 21. The enlarged diameter portion 24 is configured such that its diameter increases towards the base end, but it does not have... Figure 1 The step is as shown in (k). The cone angle β is less than the angle α, and the expanded diameter portion 24 is configured such that its side surface does not contact the surfaces of the two joined parts 2a and 2b during synchronous stirring. In addition, the joined parts 2a and 2b mentioned here may sometimes be the plastic flow portion PF. That is, the side surface of the expanded diameter portion 24 is configured such that it does not contact the surface of the plastic flow portion PF during synchronous stirring. On the other hand, the pin portion 21 has a shoulder portion 23. The shoulder portion 23 is provided to be able to contact the plastic flow portion PF. The shoulder portion 23 is formed such that the ratio of the diameter of the shoulder portion 23 to the diameter of the base end side of the pin portion 21 satisfies 1.8 or less.

[0118] exist Figure 1 In the synchronous stirring coupling device 3 shown in (m), the pin 21 is configured to, with Figure 1 Compared to the synchronous stirring coupling device 3 shown in (l), the pin portion 21 is longer. In addition, the cone angle β of the expanded diameter portion 24 is greater than the angle α, but its side is configured so that it does not make line contact with the two coupled parts 2a and 2b during synchronous stirring.

[0119] exist Figure 1 In the synchronous stirring coupling device 3 shown in (n), the diameter expansion section 24 and Figure 1 Compared to the synchronous stirring device 3 shown in (l), it is thinner overall, and the cone angle β is configured to be smaller than the angle α.

[0120] exist Figure 1 (a) in Figure 1 In any of the examples shown in (n), the aforementioned auxiliary tools were not used. Even without the use of auxiliary tools, excellent corner bonding can be achieved through synchronous stirring bonding.

[0121] The above example belongs to the manner described in (iii) above, but in this invention, as the manner described in (iv) above, it can also be adopted. Figure 1 (o) and Figure 1 Example (p) is shown in the figure. In this example, the plastic flow portion PF on the circumferential CD of the expansion portion 24 is in line contact with the side of the expansion portion 24 at the line contact position LC on both sides in a spatially open manner. In this example, excellent corner jointing can be achieved by synchronous stirring even without the use of auxiliary tools.

[0122] The following uses Figures 2-5 The rotating component 1 for synchronous stirring in the first to third embodiments will be described. Figures 2-5 The rotating component 1 for synchronous stirring shown can be used in the synchronous stirring joining device 3, and the synchronous stirring joining device 3 can be used in the manufacturing method of components that are corner-joined by synchronous stirring joining.

[0123] <First Implementation Method> Figure 2 (a) is a schematic cross-sectional view of the synchronous stirring rotating component 1 of the first embodiment. Figure 2 (b) is a sectional view along line AA. In the figure, H, C, and T represent the retainer, chuck, and tool, respectively. AD, CD, and RD represent the axial direction, circumferential direction, and radial direction, respectively. These symbols are sometimes omitted in other figures, but are interpreted in the same way as in this figure. Furthermore, in all figures, in the rotating component 1 for synchronous stirring, when adjacent components are shaded with the same shading line, it indicates that the components are fixed to each other. On the other hand, when different components are shaded with different shading lines, it indicates that the components are not fixed to each other. Additionally, in all figures, the same reference numerals are used to label the same structures.

[0124] A synchronous stirring rotating component 1 is mounted on a synchronous stirring coupling device 3. The synchronous stirring coupling device 3 is a device for angular coupling of two coupled components 2a and 2b based on synchronous stirring. The synchronous stirring coupling device 3 has a drive mechanism 4. The synchronous stirring rotating component 1 is detachably mounted on the output shaft 5 of the drive mechanism 4. The synchronous stirring rotating component 1 rotates with the output shaft 5 in a manner that does not involve relative displacement with the output shaft 5.

[0125] The rotating component 1 for synchronous stirring has a metal rotating shaft portion 10 and a metal front end portion 20. The rotating shaft portion 10 corresponds to the retainer H. The rotating shaft portion 10 has a generally cylindrical shape extending in the axial direction AD. The rotating shaft portion 10 is fixed to the output shaft 5 on its upper surface side. The rotating shaft portion 10 has a bottomed hole on its lower surface for receiving the front end portion 20. The bottomed hole opens downwards. The front end portion 20 is provided within the bottomed hole.

[0126] The front end portion 20 has a pin portion 21 and a base end side portion 22 disposed on the base end side of the pin portion 21. The pin portion 21 corresponds to a tool T. The base end side portion 22 corresponds to a chuck C. The base end side portion 22 has a generally cylindrical shape extending along the axial direction AD. The base end side portion 22 has a bottomed hole on its lower surface for receiving the pin portion 21. The bottomed hole opens downward. The pin portion 21 is disposed within the bottomed hole. The pin portion 21 is fixed to the base end side portion 22 in a manner that does not displace relative to the base end side portion 22. The front end of the pin portion 21, during synchronous stirring, as... Figure 2 As shown in (a) of the figure, the parts to be joined, 2a and 2b, are inserted. In the figure, PF schematically shows the plastic flow portion of the parts to be joined, 2a and 2b, during simultaneous stirring. Furthermore, the parts to be joined, 2a and 2b, are arranged as follows: Figure 1 (a) in Figure 1 The corner joint shown in (c) is positioned on a valley-shaped support platform (not shown) and fixed to the support platform by a fixing clamp (not shown). The fixing clamp can be, for example, a conventionally known clamp. The support platform and the fixing clamp are examples of the holding mechanism of the synchronous stirring and joining device 3. The holding mechanism can be, for example, an L-shaped fixing clamp, a multi-axis clamp, or other conventionally known holding mechanisms. The holding mechanism can be mechanical or hydraulic, without particular limitation. Furthermore, the synchronous stirring and joining device 3 has a moving mechanism (not shown) that moves the drive mechanism 4 together with the output shaft 5 and the synchronous stirring rotating component 1 along the interior angle α formed by the two joined components 2a and 2b. This moving mechanism moves the pin 21 and the pin 21 in the two joined components 2a and 2b. The moving mechanism can be, for example, a gantry mechanism, a robotic arm, a lathe-type mechanism, a CNC machine tool, a track-type moving mechanism, a pick-and-place mechanism, or other conventionally known mechanisms. Alternatively, the two engaged parts 2a and 2b can be moved, either in place of pin 21 or together with pin 21. Specifically, the moving mechanism can be configured to move the holding mechanism that holds the two engaged parts 2a and 2b. Such a moving mechanism can be a conventionally known moving mechanism such as a linear motion platform, an XY table, a multi-axis positioner, or a rotary table system.

[0127] like Figure 2As shown in (b), a plurality of grooves 25 are formed at intervals on the outer peripheral surface of the front end portion 20 in the circumferential direction CD. Figure 2 As shown in (a), the groove 25 is formed to extend in the axial direction AD. A rod-shaped metal fitting key 30 is provided on each groove 25. The inner portion of the radial direction RD of the fitting key 30 enters the groove 25. The outer portion of the radial direction RD of the fitting key 30 protrudes outward from the radial direction RD of the groove 25. On the inner circumferential surface of the rotating shaft portion 10, a groove 15 is formed at a position corresponding to the exposed portion of each fitting key 30. The circumferential length CD of the groove 15 is greater than the circumferential length CD of the fitting key 30. Therefore, a circumferential clearance CP is generated within the groove 15. The clearance CP is provided between the rotating shaft portion 10 and the front end portion 20. The rotating shaft portion 10 is fixed to the output shaft 5, and the front end portion 20 includes a pin portion 21. Therefore, the clearance CP is provided between the output shaft 5 and the pin portion 21. The clearance CP is a gap or substantially a gap. The pin portion 21 is free or substantially free relative to the output shaft 5 within the range of the clearance CP. Figure 2 As shown in (b), the front end portion 20 is configured to generate vibration CV in the circumferential direction CD relative to the rotating shaft portion 10 during synchronous stirring using the clearance CP. In addition, the aforementioned interlocking keys 30...30 function as keys for transmitting rotational power from the driving mechanism from the rotating shaft portion 10 to the chuck C.

[0128] Furthermore, the rotating component 1 for synchronous stirring has a clearance AP in the axial direction AD between the rotating shaft portion 10 and the front end portion 20. In other words, the clearance AP is provided between the output shaft 5 and the pin portion 21. The clearance AP is a gap or substantially a gap. The pin portion 21 is free or substantially free relative to the output shaft 5 within the range of the clearance AP. Figure 2 As shown in (a), the pin 21 is configured to vibrate AV relative to the output shaft 5 in the axial direction AD when synchronous stirring is performed using the clearance AP.

[0129] Within the plastic flow section PF, plastic flow of the joined components 2a and 2b is generated by the rotation of pin 21. Furthermore, pin 21 contacts the plastic flow component 2 within the clearances AP and CP. Pin 21 is free or substantially free within the clearances AP and CP. Therefore, passive vibrations AV and CV are generated at pin 21. Since the vibrations AV and CV of pin 21 are passive, they not only fail to impede the plastic flow of the joined components 2a and 2b, but also synchronize with and amplify the plastic flow.

[0130] The pin 21 has a shoulder 23 at the height where it contacts the plastic flow portion PF. The ratio of the diameter of the shoulder 23 to the diameter of the pin 21 located directly below the shoulder 23 (the pin 21 that is further forward than and adjacent to the shoulder 23) is 1.8 or less. Thus, the pin 21 has a shoulder 23 with a width small enough to satisfy the ratio ≤ 1.8.

[0131] Because the pin 21 has a narrow shoulder 23, it is difficult for the shoulder 23 to obstruct plastic flow. The effects of the pin 21's vibration AV and CV (difficulty in obstructing plastic flow and the ability to amplify the effect) can be obtained more effectively. Due to the narrow width of the shoulder 23, the heat generated during synchronous stirring is reduced, but effective plastic flow can be achieved through the vibration AV and CV of the pin 21. As a result, synchronous stirring can be performed at a lower temperature. In other words, because the shoulder 23 is narrower, plastic flow is less likely to be obstructed by the shoulder 23, enabling further amplification of plastic flow.

[0132] Figure 3 (a) to Figure 3 In the diagram, (t) represents a schematic cross-sectional view of the rotating component 1 for synchronous stirring in the modified example. Figure 3 In (a), (s), and (t), H, C, and T respectively represent the retainer, chuck, and tool. For convenience, in Figure 3 (b) to Figure 3 The H, C, and T markers are omitted in (r), but they are the same as... Figure 3 (a), (s), and (t) are the same.

[0133] [ Figure 3 (a) Figure 3 In (a), the synchronous stirring rotating component 1 is generally equivalent to tool T, the rotating shaft 10 is equivalent to a part of tool T, and the front end 20 is equivalent to a part of tool T.

[0134] The front end portion 20 has an integrally formed base end side portion 22 and a pin portion 21. The front end portion 20 is mounted to the rotating shaft portion 10 by being inserted into a bottomed hole provided on the lower surface of the rotating shaft portion 10. The lower surface of the rotating shaft portion 10 forms a shoulder portion 23. Figure 2 (a) and Figure 2 As shown in (b), a locking key 30 is provided between the rotating shaft portion 10 and the front end portion 20. Thus, the synchronous stirring rotating component 1 has clearances AP and CP between the rotating shaft portion 10 and the front end portion 20. The synchronous stirring rotating component 1 is mounted on the chuck C. Since the retainer H and the chuck C are fixedly provided on the output shaft 5, the synchronous stirring rotating component 1 is mounted on the output shaft 5 via the retainer H and the chuck C.

[0135] [ Figure 3 (b) Figure 3 In (b) shown, the synchronous stirring rotating component 1 corresponds to the chuck C and the tool T, the rotating shaft portion 10 corresponds to a part of the chuck C and the tool T, and the front end portion 20 corresponds to a part of the tool T. The synchronous stirring rotating component 1 is mounted on the output shaft 5 via a retainer H. Apart from this, Figure 3 The method in (b) is the same as Figure 3 (a) is the same as in the previous sentence.

[0136] [ Figure 3 (c) Figure 3 In (c), the synchronous stirring rotating component 1 corresponds to the retainer H, the chuck C, and the tool T; the rotating shaft portion 10 corresponds to a part of the retainer H, the chuck C, and the tool T; and the front end portion 20 corresponds to a part of the tool T. The synchronous stirring rotating component 1 is mounted on the output shaft 5. Apart from this, Figure 3 The method of (c) in the middle is the same as Figure 3 (a) and Figure 3 (b) is the same.

[0137] [ Figure 3 (d) Figure 3 The synchronous stirring rotating component 1 shown in (d) has a rotating shaft portion 10, an intermediate body 40, and a front end portion 20. The synchronous stirring rotating component 1 corresponds to a chuck C and a tool T. The rotating shaft portion 10 corresponds to the chuck C. The intermediate body 40 corresponds to a part of the tool T. The front end portion 20 corresponds to a part of the tool T. The front end portion 20 is mounted on the intermediate body 40 by inserting it into a bottomed hole provided on the lower surface of the generally cylindrical intermediate body 40. The lower surface of the intermediate body 40 forms a shoulder 23. A fitting key 30 is provided between the intermediate body 40 and the front end portion 20. However, in… Figure 3 In the example shown in (d), a clearance CP is provided by the interlocking key 30, but no clearance AP is provided. The front end 20 can be positioned relative to the intermediate body 40 in the circumferential direction CD (refer to...). Figure 2 Vibration occurs on the rotating shaft 10. The intermediate body 40 is mounted on the rotating shaft 10 by being inserted into a bottomed hole provided on the lower surface of the rotating shaft 10. Thus, a clearance AP is provided between the rotating shaft 10 and the intermediate body 40. The intermediate body 40 is capable of moving relative to the rotating shaft 10 in the axial direction AD (refer to...). Figure 2Vibration occurs on the surface. Therefore, the clearances AP and CP provided between the rotating shaft 10 and the front end portion 20 do not necessarily need to be formed by the rotating shaft 10 and the front end portion 20. Alternatively, an intermediate body 40 capable of relative displacement with respect to both the rotating shaft 10 and the front end portion 20 can be sandwiched between them. In this way, the rotating component 1 for synchronous stirring has clearances AP and CP as a whole between the rotating shaft 10 and the front end portion 20.

[0138] [ Figure 3 (e) Figure 3 The synchronous stirring rotating component 1 shown in (e) is... Figure 3 Similarly, (d) includes a rotating shaft 10, an intermediate body 40, and a front end 20. The rotating component 1 for synchronous stirring corresponds to the retainer H, the chuck C, and the tool T. The rotating shaft 10 corresponds to the retainer H. The intermediate body 40 corresponds to a portion of the chuck C and the tool T. The front end 20 corresponds to a portion of the tool T. Figure 3 In method (e), the position of the clearance AP is related to Figure 3 The (d) in the text is different.

[0139] [ Figure 3 (f) in exist Figure 3 In method (f), the rotating component 1 for synchronous stirring corresponds to the retainer H, the chuck C, and the tool T. The rotating shaft 10 corresponds to the retainer H. The intermediate body 40 corresponds to the chuck C. The front end 20 corresponds to the tool T. The interlocking key 30 is provided between the intermediate body 40 and the front end 20, thereby providing clearance CP between the intermediate body 40 and the front end 20. Clearance AP is provided between the rotating shaft 10 and the intermediate body 40.

[0140] [ Figure 3 (g) exist Figure 3 In the (g) method, with Figure 3 Unlike (f), a fitting key 30 is provided between the rotating shaft portion 10 and the intermediate body 40, thereby providing clearance CP between the rotating shaft portion 10 and the intermediate body 40. Clearance AP is provided between the intermediate body 40 and the front end portion 20.

[0141] [ Figure 3 [h] exist Figure 3 In the (h) method, with Figure 2In comparison, the shoulder 23 is wider. The aforementioned ratio is 2 or more. Since the shoulder 23 and the pin 21 are integral, the same vibration occurs in the shoulder 23 as in the pin 21. Therefore, even though the shoulder 23 is wider, it is difficult to impede the plastic flow of the joined parts 2a and 2b, and the plastic flow can be amplified. In addition, as mentioned above, the shoulder 23 can also be formed separately from the pin 21 and configured not to rotate with the pin 21.

[0142] [ Figure 3 (i) Figure 3 [j] exist Figure 3 (i) and Figure 3 In the manner of (j), with Figure 2 In contrast, the front end of pin 21 has a different shape. Figure 2 The front end of the pin 21 has a truncated cone shape that is thinner at the front end (the truncated cone shape is thinner at the front end than at the base end), and Figure 3 The front end of pin 21 in (i) has an inverted frustum shape with a thicker front end (the front end side is a frustum shape that is thicker than the base end side). Figure 3 The front end of pin 21 in (j) has a cylindrical shape. Thus, the shape of the front end of pin 21 is not particularly limited. Various shapes can be used as the shape of pin 21.

[0143] [ Figure 3 (k) in exist Figure 3 In the (k) method, the ratio is 1.0 and the synchronous stirring rotating member 1 does not have a shoulder. Since the synchronous stirring rotating member 1 does not have a rotating shoulder, synchronous stirring engagement at a lower temperature can be achieved.

[0144] [ Figure 3 (l) in Figure 3 [m] exist Figure 3 In the (l) method, with Figure 2 Unlike other components, the rotating part 1 for synchronous stirring only has an axial direction AD (see reference). Figure 2 The gap AP on ) . Additionally, in Figure 3 In the (m) method, the rotating component 1 for synchronous stirring only has a circumferential CD (refer to...). Figure 2 The clearance CP on the axis. Thus, the rotating component 1 for synchronous stirring can also have clearance in only one of the following directions: axial direction AD, circumferential direction CD, and radial direction RD.

[0145] [ Figure 3 [n] exist Figure 3In the (n) configuration, the rotating component 1 for synchronous stirring corresponds to the chuck C and the tool T. The rotating shaft 10 corresponds to the chuck C. The front end portion 20 corresponds to the tool T. The front end portion 20 has a pin portion 21 and a base end portion 22 integrally formed. The front end portion 20 is mounted on the rotating shaft 10 by moving into a large-diameter bottom hole 17 provided on the lower surface of the rotating shaft 10. Since the diameter of the large-diameter bottom hole 17 is larger than the diameter of the base end portion 22, a radial RD (refer to) is provided around the base end portion 22. Figure 2 The clearance RP of the front end portion 20 is fixed to the outer surface of the base end portion 22. A lateral through hole 16 is provided in the rotating shaft portion 10 at a position corresponding to the fixed key 31. A clearance CP is provided together with the clearance RP through the lateral through hole 16. That is, the front end portion 20 has clearance CP and clearance RP between itself and the rotating shaft portion 10. The front end portion 20 is able to vibrate relative to the rotating shaft portion 10 in the circumferential direction CD and radial direction RD.

[0146] [ Figure 3 [o] exist Figure 3 In the (o) configuration, the synchronous stirring rotating component 1 has a rotating shaft portion 10, an intermediate body 40, and a front end portion 20. The synchronous stirring rotating component 1 corresponds to the retainer H, the chuck C, and the tool T. The rotating shaft portion 10 corresponds to the retainer H. The intermediate body 40 corresponds to the chuck C. The front end portion 20 corresponds to the tool T. The front end portion 20 has a pin portion 21 and a base end side portion 22 integrally formed. The front end portion 20 is mounted on the intermediate body 40 by moving into a large-diameter bottom hole 17 provided on the lower surface of the intermediate body 40. Since the diameter of the large-diameter bottom hole 17 is larger than the diameter of the base end side portion 22, a radial RD (refer to) is provided around the base end side portion 22. Figure 2 The clearance RP of the intermediate body 40 is provided. A fixing key 31 is fixed to the outer surface of the base end side 22. A side through hole 16 is provided in the intermediate body 40 at a position corresponding to the fixing key 31. A clearance CP is provided together with the clearance RP through the side through hole 16. That is, the front end 20 has clearance CP and clearance RP between itself and the intermediate body 40. The front end 20 is able to vibrate in the circumferential direction CD and radial direction RD relative to the intermediate body 40. The intermediate body 40 is mounted on the rotating shaft 10 by inserting it into a bottom hole provided on the lower surface of the rotating shaft 10. Thus, a clearance AP is provided between the rotating shaft 10 and the intermediate body 40. The intermediate body 40 is able to vibrate in the axial direction AD (refer to the reference) relative to the rotating shaft 10. Figure 2 Vibration occurs on the rotating part 1. As described above, the rotating part 1 for synchronous stirring has clearances AP, CP, and RP between the rotating shaft 10 and the front end portion 20. Therefore, the front end portion 20 can vibrate relative to the rotating shaft 10 in all directions, including the axial direction AD, the circumferential direction CD, and the radial direction RD.

[0147] [ Figure 3 [p] exist Figure 3 In the way of (p), with Figure 2 In contrast, the clearances AP and CP are not voids, but are filled with liquid 41 (e.g., lubricating oil). This synchronous stirring rotating component 1 can also achieve the vibration of the pin 21 as described above. That is, the clearances AP and CP are essentially voids. The front end 20 is essentially free within the range of the clearances AP and CP.

[0148] [ Figure 3 [q] exist Figure 3 In the (q) method, with Figure 2 Compared to the previous method, an elastic body 42 (e.g., an O-ring) is provided within the clearance AP between the rotating shaft 10 and the front end portion 20. This synchronous stirring rotating component 1 can also achieve the vibration of the pin portion 21 as described above. That is, the clearances AP and CP are essentially voids. The front end portion 20 is essentially free within the range of the clearances AP and CP.

[0149] In the above example, the case where the synchronous stirring rotating component 1 has a rotating shaft portion 10 and a front end portion 20, a clearance is provided between the rotating shaft portion 10 and the front end portion 20, and the front end portion 20 includes a pin portion 21 has been described. However, the synchronous stirring rotating component 1 is not limited to the above example, and for example, it can be adopted in the following manner.

[0150] [ Figure 3 (r) in exist Figure 3 In the (r) configuration, the synchronous stirring rotating component 1 corresponds to the chuck C and the tool T. The synchronous stirring rotating component 1 is integrally constructed and has a pin portion 21 and a shoulder portion 23. The synchronous stirring rotating component 1 is configured such that a clearance AP is generated between the synchronous stirring rotating component 1 and the holder H by means of mounting on the holder H. During synchronous stirring, the synchronous stirring rotating component 1, including the pin portion 21, vibrates relative to the output shaft 5 in the axial direction AD due to the clearance AP.

[0151] [ Figure 3 (s) exist Figure 3In the method described in (s), the synchronous stirring rotating component 1 corresponds to the retainer H. The synchronous stirring rotating component 1 has a bottomed hole on its lower surface for inserting a chuck C and a tool T. The chuck C and tool T are detachably mounted on the synchronous stirring rotating component 1 by inserting them into the bottomed hole. The synchronous stirring rotating component 1 does not have a pin. The pin is contained within the tool T. The synchronous stirring rotating component 1 has a bottomed hole on its upper surface for receiving an output shaft 5. The synchronous stirring rotating component 1 is mounted on the output shaft 5 by inserting it into the bottomed hole. The synchronous stirring rotating component 1 is configured such that when mounted on the output shaft 5, a clearance AP is generated between the output shaft 5 and the synchronous stirring rotating component 1. As a result, during synchronous stirring, a clearance AP is generated between the output shaft 5 and the pin of the tool T. The clearance AP allows the pin to vibrate relative to the output shaft 5.

[0152] [ Figure 3 [t] exist Figure 3 In the (t) configuration, the synchronous stirring rotating component 1 has a rotating shaft portion 10 and a front end portion 20. The synchronous stirring rotating component 1 corresponds to the retainer H. The rotating shaft portion 10 is the upper part of the retainer H and is mounted on the output shaft 5. The front end portion 20 is the lower part of the retainer H and is configured to rotate by the rotation transmitted from the rotating shaft portion 10, located at a front end side closer to the rotating shaft portion 10. The chuck C and the tool T are detachably mounted on the front end portion 20. That is, the front end portion 20 does not have a pin, but has a base end side portion 22 configured to detachably mount the pin. Clearances AP and CP are provided between the rotating shaft portion 10 and the front end portion 20, allowing the pin to vibrate relative to the rotating shaft portion 10.

[0153] Furthermore, the rotating component 1 for synchronous stirring is not limited to the examples described above. The rotating component 1 for synchronous stirring only needs to be configured to generate clearance between the output shaft 5 and the pin 21 when mounted on the output shaft 5, and does not necessarily need to be based on the distinction between components such as the retainer H, the chuck C, and the tool T.

[0154] <Synchronous stirring and connecting device> The synchronous stirring and joining device of the first embodiment has Figure 2 (a) and Figure 2The synchronous stirring coupling device 3 shown in (b) is a synchronous stirring rotating component 1. The synchronous stirring coupling device 3 includes: a drive mechanism 4 having an output shaft 5; and a pin 21. The pin 21 has clearances AP and CP between the output shaft 5 and the pin 21, enabling the pin 21 to vibrate AV and CV relative to the output shaft 5. In the synchronous stirring coupling device 3, through the clearances AP and CP, the vibrations AV and CV of the pin 21 during synchronous stirring have a larger amplitude and / or frequency than the vibration (basic vibration) of the output shaft 5. The synchronous stirring coupling device 3 of this embodiment includes a synchronous stirring rotating component 1 with clearances AP and CP, but the synchronous stirring coupling device 3 only needs to have clearance between the output shaft 5 and the pin 21; it is not necessary to have a synchronous stirring rotating component 1. Furthermore, the synchronous stirring coupling device is for corner joints. The synchronous stirring coupling device can be specifically designed for corner joints, but it is not necessarily required to be specifically designed for corner joints.

[0155] Furthermore, the values, materials, structures, shapes, etc., listed in the above embodiments are merely examples, and different values, materials, structures, shapes, etc., may be used as needed. Additionally, in the above embodiments, the pin 21 is located above, and the joined parts 2 (2a, 2b, etc.) are located below, with the pin 21 and the joined parts 2 (2a, 2b, etc.) facing each other in the vertical direction. Specifically, in Figure 1 In the example shown, pin 21 is inclined. Figures 2-5 In the example shown, pin 21 faces the vertical direction, but in either case, pin 21 can be said to face the up-down direction. That is, the axial direction is the same as the up-down direction. However, the axial direction does not necessarily have to be the same as the up-down direction. The axial direction is not particularly limited; for example, it can also be the horizontal direction. In addition, when the axial direction is up-down, the synchronous stirring rotating component can be located below, and the joined component can be located above. Furthermore, the axial direction does not necessarily have to be fixed. When a synchronous stirring joining device is constructed by providing a synchronous stirring rotating component in the above-described movable device, the axial direction can also be changed during operation.

[0156] <Second Implementation> Figure 4 (a) is a schematic cross-sectional view showing the rotating component for synchronous stirring according to the second embodiment. In the second embodiment, unless otherwise specified, the structural reference numerals corresponding to the structure in the first embodiment are the same as those in the first embodiment, and their descriptions are omitted.

[0157] The rotating component 1 for synchronous stirring in the second embodiment has a detachment prevention structure 50 that prevents the pin 21 from detaching from the output shaft 5. The detachment prevention structure 50 is configured such that the tool T, including the pin 21, together with the chuck C, will not detach from the rotating shaft portion 10. The detachment prevention structure 50 includes: a detachment prevention component 50A with a pin insertion hole 50B, a detachment prevention component mounting component 10C, and a stepped portion T1 (described later). The detachment prevention component 50A has a flat plate shape. The detachment prevention component 50A is fixed to the rotating shaft portion 10 by the detachment prevention component mounting component 10C. The pin insertion hole 50B has a size at least smaller than the maximum diameter of the chuck C, allowing the pin 21 to protrude outwards. This detachment prevention structure 50 is configured such that the stepped portion T1, formed by the difference between the outer diameters of the chuck C and the tool T, engages with the pin insertion hole 50B, thereby preventing the tool T from detaching. That is, the detachment prevention structure 50 ensures that the tool T is exposed to the outside through the pin insertion hole 50B and that the pin 21 is located at the predetermined engagement position of the engaged parts 2a and 2b (e.g., along the predetermined engagement line of the inner angle of the angle formed by the mating pair of engaged parts 2a and 2b), while preventing the tool T from detaching due to the clearance CP. Such tool T detachment is mainly caused by the gravity generated by the weight of the tool T itself, including the weight of the pin 21. In particular, the problem of detachment is often more significant when the tool T is configured to be detachable and replaceable. Furthermore, from the perspective of engagement quality, it is preferable to set the clearance AP between the pin 21 and the output shaft 5 to a degree that allows the tool T, including the pin 21, to detach from the rotating shaft 10 together with the chuck C, rather than setting the tolerance for the pin 21 to the extent that it will not detach. However, as the clearance AP increases, the risk of tool T detaching also increases.

[0158] While this risk can potentially be reduced by filling the clearance AP area with flame-retardant working oil such as water-glycol-based working oil, depending on the viscosity of the working oil, in this embodiment, the weight of the integrally joined chuck C and tool T is relatively heavy, and the viscosity of the working oil alone is insufficient to support their weight. Furthermore, when the synchronous stirring rotating member 1 is provided in the robot-type engagement device described later, centrifugal or inertial forces are applied to the synchronous stirring rotating member 1 when it is rotated, turned, and / or moved by the robot arm, thus further increasing the possibility of tool T falling off. However, the tool T can be prevented from falling off by the fall-off prevention structure 50. Furthermore, the construction of the fall-off prevention structure 50 is not limited to this embodiment. The fall-off prevention member mounting member 10C is a screw, but it is not particularly limited. Additionally, the fall-off prevention member 50A has a cap shape with a threaded groove formed on its inner circumference; on the other hand, the corresponding threaded groove can also be formed on the outer circumferential surface of the rotating shaft portion 10. Therefore, the detachment prevention component 50A can be fixed to the rotating shaft portion 10 without the need for the detachment prevention component mounting component 10C. This configuration will be described in the following modified examples.

[0159] Furthermore, since the clearance AP is provided as in this invention, it has the advantage of making tool T easy to replace. In particular, when a general user or an operator unfamiliar with the operation replaces tool T, there is no need to use a special device for tool replacement; tool T can be easily replaced with a new tool by hand by holding it and pulling it out.

[0160] <Modifications of the Second Embodiment> Figure 4(b) is a perspective view schematically showing a modified example of the second embodiment of the synchronous stirring rotating member 1. In this modified example, unless otherwise specified, the structural reference numerals corresponding to the structures in the above embodiments are the same as those in the above embodiments, and their descriptions are omitted. In the synchronous stirring rotating member 1 of this modified example, the chuck C and the tool T, which are integrally formed together, are inserted into the bottomed hole formed in the front end opening 10A of the rotating shaft portion 10 from the front end opening 10A of the rotating shaft portion 10, thereby installing the chuck C and the tool T in the front end opening 10A of the rotating shaft portion 10. The detachment prevention structure 50 includes a detachment prevention member 50A and a step portion T1. The detachment prevention member 50A is configured such that the diameter r of the pin insertion hole 50B formed in the detachment prevention member 50A satisfies r < R with the outer shape R of the chuck C. The front end of the tool T and the chuck C, which are integrally formed with the tool T, are prevented from being submerged in the rotating shaft portion 10, and the front end of the tool T is exposed to the outside from the pin insertion hole 50B. As described above, the anti-detachment component 50A and the rotating shaft portion 10 are fixed together by their threaded grooves, preventing the anti-detachment component 50A from separating from the rotating shaft portion 10 during synchronous stirring engagement. Furthermore, the structure for fixing the anti-detachment component 50A to the rotating shaft portion 10 is not limited to this example. Additionally, the tool T is configured such that its outer diameter is smaller than the diameter r of the pin insertion hole 50B. Therefore, by holding and rotating the tool T mounted on the chuck C, the tool T can be separated from the chuck C and pulled out from the anti-detachment component 50A via the pin insertion hole 50B. Other tools T can also be mounted on the chuck C via the pin insertion hole 50B. Therefore, only the tool T needs to be replaced. In this embodiment, the tool T and the chuck C can be separated, but the tool T and the chuck C can also be configured as a single, inseparable unit. In this case, the anti-detachment component 50A is removed from the rotating shaft portion 10, and the chuck C and the tool T are replaced. Figure 4 (a) and Figure 4 The synchronous stirring rotating component 1 shown in (b) has a front-end insertion type detachment prevention structure 50 for inserting the chuck C and tool T from the front end side, but the synchronous stirring rotating component is not limited to these examples. Figure 5 (a) in Figure 5 As shown in (c), the rotating component for synchronous stirring can also have a rear-end insertion type detachment prevention structure that allows the chuck C and tool T to be inserted from the rear end side.

[0161] <Third Implementation Method> Figure 5(a) is a schematic cross-sectional view of the synchronous stirring rotary member 1 according to the third embodiment. In the third embodiment, unless otherwise specified, the structural reference numerals corresponding to the structures in the above embodiments are the same as those in the above embodiments, and their descriptions are omitted. The synchronous stirring rotary member 1 of the third embodiment has a detachment prevention part 50A' integrally formed with the rotating shaft 10, instead of the detachment prevention part 50A described above. The detachment prevention part 50A' has a pin insertion hole 50B. A rear hole 10E is formed on the rear end side of the rotating shaft 10. The tool T and the chuck C, which are integrally formed with each other, are inserted into the rear hole 10E together with the fitting key 30, and a closing member 100 is also provided to close the rear hole 10E from the rear. Corresponding threaded grooves are formed on the closing member 100 and the rotating shaft 10, and the closing member 100 is fixed to the rotating shaft 10 by these threaded grooves. Thus, while ensuring the clearance AP, it is possible to prevent the tool T and the chuck C from detaching and to always expose the front end of the tool T. In this embodiment, the detachment prevention structure 50 includes a detachment prevention part 50A', a step part T1, and a closing member 100.

[0162] <Modifications of the Third Embodiment> Figure 5 (b) and Figure 5 (c) is a perspective view schematically showing a modified example of the third embodiment of the rotating component for synchronous stirring. In this modified example, unless otherwise specified, the structural reference numerals corresponding to the structures in the above embodiments are the same as those in the above embodiments, and their descriptions are omitted. Figure 5 (b) and Figure 5 The synchronous stirring rotating component 1 in (c) and Figure 5 Similarly, in (a) of the synchronous stirring rotating component 1, the tool T and chuck C, which are integrally formed, are inserted into the rear hole 10E from the rear end side, and the rear hole 10E is closed by the closing component 100. The fixing structure of the closing component 100 is not limited to a threaded structure. For example, any structure can be used, such as forced fitting, or anti-loosening screw insertion hole that passes through the outer periphery of the rotating shaft 10 and is fixed by a headless screw.

[0163] Explanation of reference numerals in the attached figures 1. Rotary component for synchronous stirring 2a, 2b, 2c Components to be joined 3. Synchronous stirring and connecting device 4. Drive mechanism 5. Output shaft (of the drive mechanism) 10 Rotating shaft 15 slots 16 side through holes 17 Large diameter bottomed hole 20 Front end Sales Department 21 22. Basement side 23 Shoulders 24. Expanded Diameter Section 25 slots 30 interlocking keys 31 Fixed key 40 intermediates 41 Liquid 42. Elastomers.

Claims

1. A method for manufacturing a component for corner jointing, characterized in that, The manufacturing method includes a corner joining process that joins two parts together at the corners. The corner joining process is carried out by a synchronous stirring and joining device. The synchronous stirring and joining device includes: an output shaft; a drive mechanism configured to rotate the output shaft; and a pin disposed at the front end of the output shaft, configured to rotate by rotation transmitted from the drive mechanism, and inserted into the two joined components during synchronous stirring. The pin has a clearance between the output shaft and the pin, which allows the pin to vibrate relative to the output shaft. This clearance is either a gap or substantially a gap, allowing the pin to be free or substantially free relative to the output shaft within the range of this clearance. In the corner joining process, the rotating pin is inserted into the two joined parts at the inner angle of the angle formed by the two joined parts, thereby performing corner joining by synchronous stirring.

2. The manufacturing method according to claim 1, characterized in that, The synchronous stirring assembly includes a rotating component for synchronous stirring, which is mounted on the output shaft and includes the pin or is configured to detachably mount the pin. The synchronous stirring rotating component is configured such that, when mounted on the output shaft, a clearance is generated between the output shaft and the pin that allows the pin to vibrate relative to the output shaft.

3. The manufacturing method according to claim 1 or 2, characterized in that, The pin is configured such that, through the clearance, the vibration of the pin during synchronous stirring has a larger amplitude and / or frequency than the vibration of the output shaft.

4. The manufacturing method according to any one of claims 1 to 3, characterized in that, The pin is configured such that, within the clearance range, it passively vibrates through contact with the plastic flow components in the two joined parts.

5. The manufacturing method according to any one of claims 1 to 4, characterized in that, The pin is configured such that, through the clearance, vibration of the pin occurs in at least one of the axial, circumferential, and radial directions.

6. The manufacturing method according to any one of claims 1 to 5, characterized in that, The corner joining process is a process of corner joining by synchronous stirring without the use of auxiliary tools. The auxiliary tools are configured not to rotate with the pin, but to apply pressure to the plastic flow generated in the two joined parts at the inner corner by synchronous stirring.

7. The manufacturing method according to any one of claims 1 to 6, characterized in that, On the base end side of the pin, an enlarged diameter portion is provided in a manner connected to the pin, the enlarged diameter portion being configured to satisfy at least one of the following two requirements: (i) its diameter is larger than that of the pin; and (ii) as the diameter increases toward the base end side... In the corner joining process, the rotating pin is inserted into the two joined parts at the inner angle of the angle formed by the two joined parts in such a manner that either of the following conditions is met, thereby performing corner joining by synchronous stirring: (iii) the plastic flow generated in the two joined parts at the inner angle by synchronous stirring does not make line contact with the side of the enlarged part; or (iv) the plastic flow makes line contact with the enlarged part in a spatially open manner on both sides of the line contact position between the plastic flow and the enlarged part in the circumferential direction of the enlarged part.

8. The manufacturing method according to claim 7, characterized in that, The enlarged diameter portion is configured to at least satisfy the requirement of (ii). The taper angle of the expanded diameter portion has an angle less than or equal to the angle formed by the two joined components. In the corner joining process, the rotating pin is inserted into the two joined parts at the inner corner of the corner formed by the two joined parts in such a way that the plastic flow generated by the synchronous stirring joining at the inner corner does not contact the side of the diameter expansion part, thereby performing corner joining by synchronous stirring joining.

9. The manufacturing method according to any one of claims 1 to 8, characterized in that, In the corner joining process, the rotating pin is inserted into the two joined parts at the inner angle of the angle formed by the two joined parts, and then moved along the inner angle, thereby performing corner joining by synchronous stirring.

10. The manufacturing method according to any one of claims 1 to 9, characterized in that, The manufacturing method further includes a configuration step, in which the two parts to be joined are configured before the corner joining step, such that the two parts to be joined form the corner, and the pin can be inserted into the two parts to be joined at the inner corner of the corner during the corner joining step.

11. A synchronous stirring and joining device for corner joints, characterized in that, have: Output shaft; The drive mechanism is configured to rotate the output shaft; A pin, located on the front end side of the output shaft, is configured to rotate by the rotation transmitted from the drive mechanism and insert into the two joined parts during synchronous stirring. A retaining mechanism holds the two engaged components. as well as The moving mechanism changes the relative position of the pin and the two engaged components. The pin has a clearance between the output shaft and the pin, which allows the pin to vibrate relative to the output shaft. This clearance is either a gap or substantially a gap, allowing the pin to be free or substantially free relative to the output shaft within the range of this clearance. The moving mechanism is configured to insert the rotating pin into the two joined parts at the inner angle of the angle formed by the two joined parts, thereby performing angular joining by synchronous stirring.

12. The synchronous stirring and joining device according to claim 11, characterized in that, It also includes a rotating component for synchronous stirring, which is disposed on the output shaft and includes the pin portion. The synchronous stirring rotating component is configured such that, when mounted on the output shaft, a clearance is generated between the output shaft and the pin that allows the pin to vibrate relative to the output shaft.

13. The synchronous stirring and joining device according to claim 11 or 12, characterized in that, The pin is configured such that, through the clearance, the vibration of the pin during synchronous stirring has a larger amplitude and / or frequency than the vibration of the output shaft.

14. The synchronous stirring and joining device according to any one of claims 11 to 13, characterized in that, The pin is configured such that, within the clearance range, it passively vibrates through contact with the plastic flow components in the two joined parts.

15. The synchronous stirring and joining device according to any one of claims 11 to 14, characterized in that, The pin is configured such that, through the clearance, vibration of the pin occurs in at least one of the axial, circumferential, and radial directions.

16. The synchronous stirring and joining device according to any one of claims 11 to 15, characterized in that, The synchronous stirring and joining device does not include an auxiliary tool configured not to rotate with the pin, but to apply pressure to the plastic flow generated in the two joined parts at the inner corner by the synchronous stirring and joining.

17. The synchronous stirring and joining device according to any one of claims 11 to 16, characterized in that, On the base end side of the pin, an enlarged diameter portion is provided in a manner connected to the pin, the enlarged diameter portion being configured to satisfy at least one of the following two requirements: (i) its diameter is larger than that of the pin; and (ii) as the diameter increases toward the base end side... The moving mechanism is configured to insert the rotating pin into the two joined parts at the inner angle of the angle formed by the two joined parts in such a way as to satisfy any of the following requirements, thereby performing angular joining by synchronous stirring joining, the requirement being: (iii) the plastic flow generated in the two joined parts at the inner angle by synchronous stirring joining does not make line contact with the side of the expanded diameter part; or (iv) the plastic flow makes line contact with the expanded diameter part in a spatially open manner on both sides of the position where the plastic flow makes line contact with the expanded diameter part in the circumferential direction.

18. The synchronous stirring and joining device according to claim 17, characterized in that, The enlarged diameter portion is configured to at least satisfy the requirement of (ii). The taper angle of the expanded diameter portion has an angle less than or equal to the angle formed by the two joined components. The moving mechanism is configured such that the plastic flow generated in the two joined parts at the inner corner by synchronous stirring does not contact the side of the expanded diameter part, thereby performing corner joining by synchronous stirring.

19. The synchronous stirring and joining device according to any one of claims 11 to 18, characterized in that, The moving mechanism is configured such that, with the rotating pin inserted into the two joined parts at the inner angle of the angle formed by the two joined parts, it moves along the inner angle, thereby performing angular joining by synchronous stirring.

20. The synchronous stirring and joining device according to any one of claims 11 to 19, characterized in that, The retaining mechanism is configured to configure and retain the two joined parts such that the two joined parts form the angle, and the moving mechanism is capable of inserting the pin into the two joined parts at the inner angle of the angle.

21. A component for corner joining via synchronous stirring, characterized in that, The component is manufactured by the manufacturing method of any one of claims 1 to 10, or by the synchronous stirring and joining device of any one of claims 11 to 20.

22. The component for corner joining via synchronous stirring according to claim 21, characterized in that, The components that are joined by synchronous stirring are applicable to any type of transportation, including automobiles, railway vehicles, aircraft, ships, and rockets.

23. The component for corner joining via synchronous stirring according to claim 21, characterized in that, The components that are corner-jointed by synchronous stirring are applied to any one of the following: electrode components, air conditioning equipment, water-cooled or air-cooled power control units, water-cooled or air-cooled battery boxes, door panels, shock absorbers, suspension links, waveguides, antennas, motor covers, brewing tanks, vacuum device components, sputtering targets, and embedded heaters.

24. The component for corner joining by synchronous stirring according to any one of claims 21 to 23, characterized in that, The component that is corner-jointed by synchronous stirring is a component manufactured by corner-jointing two components of different thicknesses by synchronous stirring, or a component manufactured by corner-jointing two components made of different materials by synchronous stirring.

Images