Mounting device, mounting method, and product manufacturing method

Abstract

To detect whether or not a workpiece is correctly gripped to a turning machine before turning.SOLUTION: A mounting device (1) includes a pressing jig (3) that presses a workpiece (400) against a turning machine (200). The pressing jig (3) has attached thereto a contact body (33) contactable to the workpiece and a force sensor (35) for detecting a force in the pressing direction acting upon the workpiece from the turning machine and a torque around an axis orthogonal to the pressing direction via the contact body (33).SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a mounting device and a mounting method for mounting an object to be turned on a turning machine, and a manufacturing method of a product. [Background technology]

[0002] In various types of machining, a chuck that grips a workpiece is known. For example, Patent Document 1 discloses a gripping force sensor that measures the gripping force (holding force) of a chuck that grips a workpiece. The gripping force sensor in Patent Document 1 has a strain body (including a large diameter curved plate portion, a small diameter curved plate portion, etc.) cantilevered on one side of a base portion, and when the chuck grips these curved plate portions, a strain gauge attached to the strain body is distorted, detecting the gripping force (holding force).

[0003] Incidentally, in the manufacture of disc brake plates, it is known that the disc brake plate is gripped by a chuck of a turning machine and the disc brake plate is turned. It is also known that at this time, a device for gripping (loading) the disc brake plate into the chuck of the turning machine is used to automate the turning process and efficiently manufacture the disc brake plate.

[0004] A disc brake plate is a disk-shaped structure also called a disc rotor. The disc brake plate and a brake caliper constitute a disc brake. For example, Patent Document 2 discloses a configuration in which a disc brake generates a braking force by propelling a linearly moving member with an actuator to press a brake pad (brake caliper) against a disc rotor, the configuration including a pressing force sensor that receives a pressing force between the linearly moving member and the brake pad and outputs an analog value corresponding to the pressing force. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2022-70011 [Patent Document 2] JP 2004-92812 A Summary of the Invention [Problem to be solved by the invention]

[0006] The above-mentioned turning machine is capable of performing the desired turning process on the workpiece by properly holding (chucking) the workpiece in the turning machine. However, no configuration is known that can detect whether the workpiece is properly held in the turning machine before turning.

[0007] One aspect of the present invention aims to provide a mounting device, a mounting method, and a method for manufacturing a product that can detect whether an object to be turned is properly gripped by a turning machine before turning. [Means for solving the problem]

[0008] In order to solve the above problems, an attachment device according to one embodiment of the present invention is an attachment device for attaching an object to be turned to a turning machine, and is provided with a pressing jig that presses the object to be turned against the turning machine, and the pressing jig is equipped with a contact body that can contact the object to be turned, and a force sensor that detects, via the contact body, the force in the pressing direction acting from the turning machine on the object to be turned, and the torque around an axis perpendicular to the pressing direction.

[0009] In order to solve the above problems, an installation method according to one embodiment of the present invention is a method for installing an object to be turned on a turning machine, and includes a pressing step of pressing the object to be turned against the turning machine, and a detection step of detecting, after the pressing step, a force in the pressing direction acting from the turning machine on the object to be turned and a torque around an axis perpendicular to the pressing direction by a force sensor.

[0010] In order to solve the above problems, a method for manufacturing a product according to one embodiment of the present invention includes a mounting step of mounting the turned object, which is to be the base material of the product, to the turning machine using the above-mentioned mounting method. Effect of the Invention

[0011] According to one aspect of the present invention, it is possible to realize a mounting device, a mounting method, and a manufacturing method for a product that can detect whether an object to be turned is properly gripped by a turning machine before turning. [Brief description of the drawings]

[0012] [Figure 1] 1 is a cross-sectional view of a mounting device according to an embodiment of the present invention. [Diagram 2] 2 is a block diagram showing a configuration of the mounting device shown in FIG. 1. [Diagram 3] 2 is a partially exploded side view of a pressing jig provided in the mounting device shown in FIG. 1. [Figure 4] 2 is a perspective view of a force sensor provided in the mounting device shown in FIG. 1. [Diagram 5] 1. FIG. 4 is a diagram showing an example of notification of a determination result by the wearing device shown in FIG. [Figure 6] 1. FIG. 4 is a diagram showing an example of notification of a determination result by the wearing device shown in FIG. [Figure 7] FIG. 4 is a flow diagram illustrating the process steps of a mounting method according to an embodiment of the present invention. [Figure 8] FIG. 2 is a flow diagram illustrating the process steps of a method for manufacturing a product according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] <Configuration of the mounting device> A mounting device 1 according to an embodiment of the present invention will be described with reference to Figs. 1 to 3. Fig. 1 is a cross-sectional view of the mounting device 1. Fig. 2 is a block diagram showing the configuration of the mounting device 1. Fig. 3 is a partial side view of the mounting device 1. For ease of explanation, Fig. 1 shows a cross-sectional view of a portion of the configuration. For ease of explanation, Fig. 3 shows the force sensor 35 in a separated state.

[0014] The mounting device 1 is a mounting device used for mounting the turning object 400 to the turning machine 200. Here, the turning object 400 is, as an example, a disk-shaped structure before turning, which is a base material for a disc brake plate, and is a disk-shaped casting having a draft angle. The turning object 400 can also be said to be a disc brake plate before turning. However, the turning object 400 is not limited to a disc brake plate before turning.

[0015] The mounting device 1 includes a pressing jig 3 and a drive mechanism 5 that drives the pressing jig 3. The drive mechanism 5 includes a pressing cylinder 51 and a mounting portion 52 to which the pressing jig 3 is attached. The pressing cylinder 51 moves the mounting portion 52 in one axial direction. In this embodiment, this one axial direction is defined as the Z-axis. The drawings also show an XYZ three-dimensional coordinate system in which the X-axis and Y-axis directions are defined with a plane perpendicular to the Z-axis as the XY plane.

[0016] The pressing jig 3 presses the turning workpiece 400 against the turning machine 200. The pressing jig 3 is attached to a surface on the negative Z-axis side of the mounting part 52 of the driving mechanism 5, and is configured to move in the negative Z-axis direction as the mounting part 52 moves in the negative Z-axis direction, approaching the turning machine 200, which is disposed further on the negative Z-axis side than the pressing jig 3.

[0017] Here, the turning machine 200 is equipped with a chuck 201 on the Z-axis positive side. The chuck 201 is, for example, a three-jaw chuck. The chuck 201 can detachably hold (chuck) the turning workpiece 400 from the Z-axis positive side. A specific mechanism of the chuck 201 will not be described here because a chuck equipped in a well-known turning machine can be used, but the chuck 201 is configured to hold the turning workpiece 400 in a state in which the turning workpiece 400 is pressed against the turning machine 200 by the pressing jig 3. As will be described later, at the timing when the chuck 201 holds the turning workpiece 400, the pressing jig 3 releases the holding of the turning workpiece 400.

[0018] The driving mechanism 5 moves the pressing jig 3, which has released its hold on the workpiece 400, in a direction away from the turning machine 200 (toward the positive direction of the Z axis). This is an overview of the movement of the pressing jig 3. The configuration of the pressing jig 3 will be described below.

[0019] <Configuration of pressing jig> The pressing jig 3 includes a base portion 31, a chuck portion 32, a contact body 33, and a force sensor 35.

[0020] The base portion 31 is a flat plate-like structure extending in a direction perpendicular to the pressing direction (Z-axis direction). In the example shown in Fig. 3, the base portion 31 is configured as a triangular flat plate. The base portion 31 has a first main surface 31a which is a main surface facing the turning object 400, and a second main surface 31b which is a main surface opposite to the first main surface 31a.

[0021] The chuck portion 32 is attached to the first main surface 31a, has a central axis parallel to the Z axis, has an end portion on the positive side of the Z axis fixed to the first main surface 31a, and grips (chuches) the turning object at the end portion on the negative side of the Z axis. FIG. 3 shows an example of the end portion on the negative side of the Z axis of the chuck portion 32. As shown in FIG. 3, the chuck portion 32 may be a three-jaw chuck like the chuck 201 of the above-mentioned turning machine 200, and grips a predetermined chucked portion of the turning object 400, and when releasing the grip, moves each jaw of the three-jaw chuck toward the central axis. Note that the chuck portion 32 is not limited to this embodiment. When the turning object 400 is, for example, a disc brake plate, the predetermined chucked portion is a through hole provided in the center of the disc-shaped disc brake plate having a draft angle.

[0022] The contact body 33 is a rod-shaped structure attached to the first main surface of the base portion 31 and extending along the pressing direction. A plurality of contact bodies 33 are provided at equal intervals along an imaginary circle centered on the chuck portion 32. In the example shown in FIG. 3, three contact bodies 33 are provided around the chuck portion 32, and imaginary lines connecting the contact bodies 33 form an equilateral triangle. The chuck portion 32 is disposed at the center of gravity of the imaginary equilateral triangle. Note that there may be two or more contact bodies 33.

[0023] Each contact body 33 has an end on the positive Z-axis direction fixed to the first main surface 31a, and an end on the negative Z-axis direction capable of contacting the workpiece 400. Specifically, the end on the negative Z-axis direction of each contact body 33 is capable of contacting the surface on the positive Z-axis direction side of the workpiece 400 pressed in the negative Z-axis direction against the turning machine 200, and each contact body 33 has the same length. Each contact body 33 transmits the pressing force in the positive Z-axis direction received from the workpiece 400 through contact to the base portion 31.

[0024] The force sensor 35 is attached to the second main surface 31b side of the base portion 31. The force sensor 35 detects a force in a pressing direction acting on the turning workpiece 400 from the turning machine 200 and a torque around an axis perpendicular to the pressing direction via the contact body 33. The force sensor 35 is disposed so as to be located on the rear side of the location where the chuck portion 32 is disposed. The force sensor 35 is fixed to the second main surface 31b via a connecting member 36 on the second main surface 31b side of the base portion 31. The frame portion 112 of the force sensor 35 is connected to the mounting portion 52.

[0025] The force sensor 35 is a six-axis force sensor, but may be a three-axis force sensor. The force sensor 35, which is a six-axis force sensor, will be described below with reference to FIG.

[0026] FIG. 4 is a perspective view of the force sensor 35, which is a six-axis force sensor. As shown in FIG. 4, the force sensor 35 includes a strain sensor 11 and a group of six strain gauges 12a1, 12a2, 12b1, 12b2, 12c1, and 12c2. Here, the six-axis force sensor refers to a force sensor capable of detecting the X-axis component, the Y-axis component, the Z-axis component, the moment component around the X-axis, the moment component around the Y-axis, and the moment component around the Z-axis of an external force. Note that the strain sensor 11 is disposed so that its two principal surfaces are parallel to the XY plane. Of the pair of principal surfaces of the strain sensor 11, one principal surface on the negative Z-axis side is called the principal surface 11a, and the other principal surface on the negative Z-axis side is called the principal surface 11b.

[0027] The force sensor 35 is an example, and may be another existing force sensor. For example, the configuration of the force sensor may be applied to the force sensor described in FIGS. 1 and 2 of Japanese Patent Application No. 2019-068598.

[0028] In addition, the force sensor 35 includes a plurality of resistance elements and a plurality of bridge circuits in addition to the strain body 11 and the strain gauges 12a1, 12a2, 12b1, 12b2, 12c1, and 12c2. However, in this embodiment, the strain body 11 and the strain gauges 12a1, 12a2, 12b1, 12b2, 12c1, and 12c2 will be described, and the description of the plurality of resistance elements and the plurality of bridge circuits will be omitted. The configuration of the plurality of resistance elements and the plurality of bridge circuits can be applied to the configuration of an existing force sensor (for example, the force sensor described in FIG. 1 and FIG. 2 of Japanese Patent Application No. 2019-068598).

[0029] The flexure body 11 is a plate-like member made of a material having spring properties. As shown in Fig. 4, the flexure body 11 includes a core portion 111, a frame portion 112 surrounding the core portion 111, and arm portions 113a to 113c connecting the core portion 111 and the frame portion 112. Examples of materials for the flexure body 11 include conductors such as aluminum alloys, alloy steels, and stainless steels, and dielectrics such as ceramics, resins, and glass. In this embodiment, the flexure body 11 is made of ceramics, which is an example of a dielectric material.

[0030] Moreover, as a method for processing the strain body 11, a substrate that is a single plate-like member with a uniform thickness may be machined. One example of the machining is cutting. For cutting, NC (Numerical Control) processing may be suitably used. When an external force acts on the core portion 111 with the frame portion 112 fixed, distortion corresponding to the external force is generated in the arm portions 113a to 113c. For this reason, the core portion 111 may be called the "force receiving portion" and the frame portion 112 may be called the "fixed portion."

[0031] The force sensor 35 faces the Z-axis negative side principal surface 11a of the pair of principal surfaces of the strain body 11 toward the second principal surface 31b of the base part 31 shown in FIG. 1 (a connecting member 36 is interposed between them). The force sensor 35 is configured such that, with the frame part 112 fixed to the second principal surface 31b of the base part 31 via the connecting member 36, an external force is applied to the core part 111 via the contact body 33, the base part 31 and the connecting member 36, that is, a force acting from the turning machine 200 to the turning object 400. The force sensor 35 detects the X-axis component, the Y-axis component and the Z-axis component of this force. This corresponds to the "force in the pressing direction acting from the turning machine 200 to the turning object 400" detected by the force sensor 35. Furthermore, the force sensor 35 detects the moment component of this force about the X-axis, the moment component about the Y-axis, and the moment component about the Z-axis. This corresponds to the “torque about an axis perpendicular to the pressing direction” detected by the force sensor 35.

[0032] The shape of the core portion 111 is not particularly limited, but in this embodiment, the shape of the core portion 111 is a column shape with a substantially triangular bottom (i.e., a substantially triangular column shape). The shape of the frame portion 112 is not particularly limited, but in this embodiment, the shape of the frame portion 112 is a ring shape. The outer peripheral portion and the inner peripheral portion of the frame portion 112 are both substantially circular and are configured to be concentric with each other. As described above, the strain body 11 is formed by processing one base material having a uniform thickness. Therefore, the thickness of the core portion 111 and the thickness of the frame portion 112 are substantially equal (equal in this embodiment). The core portion 111 is accommodated inside the inner peripheral portion of the frame portion 112 so that the center of the ring-shaped frame portion 112 and the center of gravity of the core portion 111 coincide with each other.

[0033] In this embodiment, the arm portions 113a to 113c have a shape of a column (i.e., a substantially rectangular column shape) that has a substantially rectangular cross section and extends in one direction. The number of the arm portions 113a to 113c is not particularly limited, but in this embodiment, the number of the arm portions 113a to 113c is three. The arm portion 113a extends from the core portion 111 in the negative Y-axis direction and connects the core portion 111 to the frame portion 112. The arm portion 113b extends in the direction of -120° (120° clockwise) from the negative Y-axis direction in the XY plane and connects the core portion 111 to the frame portion 112. The arm portion 113c extends from the core portion 111 in the direction of +120° (120° counterclockwise) from the negative Y-axis direction in the XY plane and connects the core portion 111 to the frame portion 112.

[0034] However, the shapes of the core portion 111, the frame portion 112, and the arms 113a to 113c are not limited to the above shapes. For example, the core portion 111, the frame portion 112, and the arms 113a to 113c may have a shape as shown in FIG. 1 of Japanese Patent Application No. 2019-068598.

[0035] The mounting device 1 further includes a control unit 7 as shown in FIG. 2. The control unit 7 controls each component of the pressing jig 3. The control unit 7 also acquires an output signal from the force sensor 35. The control unit 7 acquires a signal indicating a force in the pressing direction acting on the turning object 400 from the turning machine 200 and a torque around an axis perpendicular to the pressing direction, which are detected by the force sensor 35. Specifically, the control unit 7 uses a threshold value to determine whether the turning object 400 is in contact with the chuck 201 of the turning machine 200 (force in the pressing direction) based on the acquired signal. The control unit 7 also sets a threshold value for the value of the moment, and uses the acquired signal to determine that the turning object 400 is tilted when the value of the moment is equal to or greater than the threshold value.

[0036] Here, the inclination of the turning object in this specification means the inclination of the turning object pressed against the turning machine with respect to the turning object when it is assumed that the turning object is normally held by the turning machine. Normal holding means that the turning machine can perform the desired turning process on the turning object. For example, if the central axis of the turning object held by the turning machine is parallel to the vertical direction, it is considered that the turning object is inclined when the central axis of the turning object is inclined with respect to the axis along the vertical direction. In another example, if the central axis of the turning object held by the turning machine is "normally held" within a horizontal plane, it is considered that the turning object is inclined when the central axis of the turning object is inclined with respect to the horizontal plane. There are various reasons why the turning object is inclined on the turning machine, but examples include a malfunction of the mounting device 1, particularly a malfunction of the chuck portion 32 of the pressing jig 3. Another possible cause of poor gripping is structural defects in the workpiece itself, such as undesirable deformation, misalignment of the center of gravity, and, in the case where the workpiece is a disc-shaped casting that is to be used as the base material for a disc brake plate, defects associated with the casting.

[0037] The control unit 7 can also control the gripping and release of the chuck unit 32. The control unit 7 may also control the drive mechanism 5. Although one control unit 7 is configured in the example of Fig. 2, a control unit may be provided for controlling each component.

[0038] As shown in FIG. 2, the mounting device 1 is also provided with an alarm unit 8. The alarm unit 8 issues a predetermined signal when at least one of the force in the pressing direction and the torque around an axis perpendicular to the pressing direction detected by the force sensor 35 exceeds a predetermined numerical range. In other words, the alarm unit 8 issues a predetermined signal when the inclination of the turning object 400 exceeds an allowable range. The alarm unit 8 can obtain a signal related to the inclination of the turning object 400 from the control unit 7. Whether or not the predetermined numerical range has been exceeded is determined by the control unit 7.

[0039] The method of alarm generation by the alarm generation unit 8 can be a known alarm generation method. If the alarm generation unit 8 includes an audio output device, the alarm can be generated by sound. If the alarm generation unit 8 includes a light emitting device, the alarm can be generated by light. As another example of the method of alarm generation by the alarm generation unit 8, if the alarm generation unit 8 includes a display device, an image indicating that a value outside a predetermined numerical range has been detected may be displayed on the display screen of the display device. This will be described with reference to Figs. 5 and 6.

[0040] 5 and 6 are examples of images 801 (FIG. 5) and 802 (FIG. 6) displayed on the display screen of the display device included in the alarm unit 8. The image 801 shown in FIG. 5 includes an image 801a that is displayed when the force in the pressing direction and the torque around the axis perpendicular to the pressing direction detected by the force sensor 35 are within a predetermined numerical range for each of them. In the example of FIG. 5, the word "OK" is displayed in the image 801a. In short, this image 801 (image 801a) means that the tilt of the turning object 400 is within the allowable range, and in this embodiment, there is no tilt of the turning object 400. Note that, as shown on the left side of the screen of the image 801, measurement data 801b by the force sensor 35 may be displayed.

[0041] The image 802 shown in FIG. 6 includes an image 802a that is displayed when at least one of the force in the pressing direction and the torque around an axis perpendicular to the pressing direction detected by the force sensor 35 exceeds a predetermined numerical range. In the example of FIG. 6, the word "NG" is displayed in the image 802a. In short, this image 802 (image 802a) means that the tilt of the turning object 400 exceeds the allowable range, and in this embodiment, the turning object 400 is tilted. Note that, like the image 801 shown in FIG. 5, the image 802 may also display measurement data 802b by the force sensor 35 as shown on the left side of the screen. In the example of FIG. 6, an illustration 802c is displayed on the lower side of the screen of the image 802a, which allows visual comparison between the current turning object 400 having a tilt and a turning object of a model without a tilt. In the illustration 802c, an illustration 802c1 representing the currently inclined turned object 400 and an illustration 802c2 representing a model of the turned object without inclination are superimposed. Here, the illustration 802c1 representing the currently inclined turned object 400 reflects the identified inclination.

[0042] The display device for displaying the above-mentioned images may be disposed not only at the lathe machining site, but also in a control room located away from the lathe machining site.

[0043] As described above, according to the mounting device 1 of the present embodiment, it is possible to identify the turning object 400 that is held in a tilted state relative to the turning machine 200 by the detection by the force sensor 35. This contributes to providing the turning object 400 that is held without tilting relative to the turning machine 200 to the turning process, and reduces the occurrence of defects in the turned product. In addition, by identifying that the turning object 400 is held by the turning machine 200 with a tilt, it is possible to interrupt the subsequent turning process. This allows the subsequent turning process to be performed with the turning object 400 held by the turning machine 200 with a tilt, and it is possible to avoid the risk of the turning object 400 coming off the turning machine 200 and flying away during the turning process.

[0044] As described above, the multiple contact bodies 33 are provided, and the contact bodies 33 are configured to come into contact with the turning workpiece 400 at multiple points. As a result, when the turning workpiece 400 is tilted, the pressing jig 3 (base portion 31) tilts via the contact bodies 33, and the force sensor 35 on the back side can detect the tilt.

[0045] Furthermore, by providing the alarm unit 8 as described above and having an alarm function, workers at the turning site can be informed of the occurrence of tilting of the turning target object 400.

[0046] The pressing jig 3 described in this embodiment can also be applied to a known mounting device for loading a turning object onto a turning machine. The control unit 7 and the alarm unit 8 can also be components of the pressing jig 3.

[0047] <How to wear> A method for mounting the workpiece 400 to the turning machine 200 in this embodiment will be described with reference to Fig. 7. Fig. 7 is a flow diagram showing the steps of the method for mounting the workpiece 400. The method for mounting the workpiece to the turning machine (S10) includes a pressing step (S11) and a detection step (S12).

[0048] The pressing step S11 is a step of pressing the workpiece 400 against the turning machine 200. The pressing step S11 is performed by driving the pressing jig 3, with the workpiece 400 being held by the chuck portion 32, in the negative direction of the Z axis by the driving mechanism 5 described above.

[0049] The turning machine 200 and the pressing jig 3 are aligned in advance. Specifically, they are aligned so that the central axis of the chuck 201 of the turning machine 200 and the central axis of the chuck portion 32 of the pressing jig 3 are coaxial (parallel to the Z-axis). The alignment may be performed in a state where the chuck portion 32 of the pressing jig 3 is not gripping the workpiece to be turned, or may be performed in a state where the chuck portion 32 is gripping the workpiece to be turned.

[0050] The pressing step S11 is completed when the chuck portion 32 of the pressing jig 3 releases the grip of the turning workpiece 400. It should be noted that immediately before the chuck portion 32 of the pressing jig 3 releases the grip, the chuck 201 of the turning machine 200 has completed gripping the turning workpiece 400.

[0051] After the pressing step S11, a detection step S12 is performed. In the detection step S12, the force in the pressing direction acting on the turning workpiece 400 from the turning machine 200 and the torque about an axis perpendicular to the pressing direction are detected by the force sensor 35.

[0052] In the detection step S12, the force in the pressing direction and the torque about an axis perpendicular to the pressing direction are detected by the force sensor 35, so that the presence or absence of inclination of the turning workpiece 400 can be identified. Detection by the force sensor 35 has been described above, but in the detection step S12, the X-axis component, the Y-axis component, and the Z-axis component of the force in the pressing direction detected by the force sensor 35, as well as the moment component about the X-axis, the moment component about the Y-axis, and the moment component about the Z-axis are detected, and the detection results are obtained as output signals by the control unit 7, which then identifies the inclination of the turning workpiece 400. The detection step S12 may include a reporting step by the above-mentioned reporting unit 8 (FIG. 2).

[0053] According to the above mounting method (S10), it is possible to identify, through detection by the force sensor 35, an object to be turned 400 that is held in a tilted state relative to the turning machine 200. This contributes to providing an object to be turned 400 that is held without tilt relative to the turning machine 200 to the subsequent turning process, and reduces the occurrence of defects in turned products.

[0054] In this embodiment, a mounting method using the mounting device 1 has been described, but the mounting method of the present invention may also be in a form in which a force sensor is used to detect the force in the pressing direction acting on the workpiece from the turning machine and the torque around an axis perpendicular to the pressing direction, using a known mounting device.

[0055] <Product manufacturing method> The above-mentioned method of mounting the turned object to the turning machine can be incorporated into a product manufacturing method as a mounting step of mounting the turned object, which will be the base material of the product, to the turning machine. Hereinafter, one aspect of the product manufacturing method will be described with reference to FIG. 8. FIG. 8 is a flow diagram showing the steps of the product manufacturing method of this embodiment. As shown in FIG. 8, the product manufacturing method (S20) includes a mounting step (S21), a determination step (S22), and a turning step (S23).

[0056] The mounting step S21 includes the pressing step S11 in FIG. 7 described above and a detection step S12 that follows the pressing step S11.

[0057] In the determination step S22, it is determined whether the inclination of the turning object, which is determined based on the force in the pressing direction acting on the turning object from the turning machine detected by the force sensor 35 in the detection step S12 and the torque around an axis perpendicular to the pressing direction, exceeds the allowable range. The determination step S22 is performed by the control unit 7. If the determination result shows that the inclination of the turning object exceeds the allowable range, the process proceeds to NO in FIG. 8. In this case, turning is not performed (the turning process is not performed). If the inclination exceeds the allowable range, a predetermined signal may be issued. On the other hand, if the determination result shows that the inclination of the turning object is within the allowable range (in this embodiment, there is no inclination of the turning object 400), the process proceeds to YES in FIG. 8 and proceeds to the turning process step S23. In the turning process S23, turning is performed on the turning object 400 held without inclination with respect to the turning machine 200, and a product is completed. As the turning process can be performed by a known method, a description thereof will be omitted here.

[0058] According to the above-described method S20 for manufacturing a product, since the workpiece to be turned is held without being tilted relative to the turning machine, a product that has been turned with high precision can be manufactured.

[0059] In addition, according to the above manufacturing method S20, a step is added to the process of mounting the turning object on the turning machine, which is a step that was not previously included, that is, a step of identifying whether the turning object is tilted or not based on the detection result by the force sensor 35. Previously, even if the turning object was mounted on the turning machine in a tilted state, the turning process may be performed as it is, and the object was discarded as a defective product in the subsequent manufacturing process. However, according to the configuration of this embodiment, the turning object mounted on the turning machine in a tilted state can be identified at the stage before the turning process is performed. As a result, the identified turning object can be normally mounted on the turning machine by some method, and the number of turning objects discarded as defective products can be reduced compared to the past. Such an effect also contributes to the achievement of, for example, Goal 9 of the Sustainable Development Goals (SDGs) advocated by the United Nations, "Build resilient infrastructure and promote innovation (infrastructure, systems, etc.)".

[0060] 〔summary〕 The mounting device according to the first aspect of the present invention is a mounting device for mounting an object to be turned on a turning machine, and is equipped with a pressing jig that presses the object to be turned against the turning machine, and the pressing jig is equipped with a contact body that can contact the object to be turned, and a force sensor that detects, via the contact body, the force in the pressing direction acting from the turning machine on the object to be turned, and the torque around an axis perpendicular to the pressing direction.

[0061] According to the configuration of the first aspect, it is possible to identify the object to be turned that is held in a tilted state relative to the turning machine by detection using a force sensor. This contributes to providing the object to be turned that is held without tilting relative to the turning machine to the turning process, and reduces the occurrence of defects in the turned product. In addition, it is possible to interrupt the subsequent turning process by identifying that the object to be turned is held by the turning machine with a tilt. This allows the subsequent turning process to be performed with the object to be turned held by the turning machine with a tilt, and it is possible to avoid the risk of the object to be turned coming off the turning machine and flying away during the turning process.

[0062] A mounting device according to a second aspect of the present invention has the same configuration as the mounting device according to the first aspect described above, in addition to the above, the pressing jig has a flat base portion extending in a direction perpendicular to the pressing direction, and a chuck portion for gripping the workpiece attached to a first main surface, which is one of the two main surfaces of the base portion and is the main surface on the side to which the contact body is attached, the force sensor is attached to a second main surface, which is the main surface opposite to the first main surface, of the two main surfaces of the base portion, and the contact body is a rod-shaped structure extending along the pressing direction and is provided at equal intervals along a virtual circle centered on the chuck portion.

[0063] According to the configuration of the second aspect, the contact bodies are configured to come into contact with the workpiece to be turned at multiple points, and when the workpiece to be turned is tilted, the pressing jig tilts via the contact bodies, and the force sensor on the back side can detect the tilt.

[0064] The attachment device according to the third aspect of the present invention, in addition to the configuration of the attachment device according to the first or second aspect described above, further includes an alarm unit that emits a predetermined signal when at least one of the force in the pressing direction and the torque about an axis perpendicular to the pressing direction detected by the force sensor exceeds a predetermined numerical range.

[0065] According to the configuration of the third aspect, the provision of an alarm function enables a worker at the turning site to know that the turning object has tilted.

[0066] The mounting device according to a fourth aspect of the present invention has the same configuration as the mounting device according to any one of the first to third aspects described above, and furthermore, the object to be turned is a disk-shaped casting having a draft angle.

[0067] According to the configuration of the fourth aspect, in the case of a disk-shaped casting having a draft, when the casting is chucked to a device to be chucked at a portion where the draft is present, the casting may be tilted due to a slight positional deviation. An example of a disk-shaped casting is a disk brake plate. When chucking such a disk-shaped casting having a draft, if the mounting device of one aspect of the present invention is used, it is possible to identify the presence or absence of tilt, and to perform turning on only the casting (turning object) that is chucked without tilt.

[0068] In order to solve the above problems, a mounting method according to a fifth aspect of the present invention is a mounting method for mounting an object to be turned on a turning machine, and includes a pressing step of pressing the object to be turned against the turning machine, and a detection step of detecting, after the pressing step, a force in the pressing direction acting from the turning machine on the object to be turned and a torque around an axis perpendicular to the pressing direction by a force sensor.

[0069] According to the configuration of the fifth aspect, it is possible to identify the object to be turned that is held in a tilted state relative to the turning machine by detection by the force sensor. This contributes to providing the object to be turned that is held without tilting relative to the turning machine to the turning process, and reduces the occurrence of defects in the turned product. In addition, it is possible to interrupt the subsequent turning process by identifying that the object to be turned is held by the turning machine with a tilt. This allows the subsequent turning process to be performed with the object to be turned held by the turning machine with a tilt, and it is possible to avoid the risk of the object to be turned coming off the turning machine and flying away during the turning process.

[0070] In order to solve the above problems, a sixth aspect of the present invention provides a method for manufacturing a product, comprising the step of mounting the turned object, which is to be the base material of the product, to the turning machine using the mounting method described in the fifth aspect above.

[0071] According to the configuration of the sixth aspect, the workpiece to be turned is chucked without being tilted relative to the turning machine, so that a product that has been turned with high precision can be manufactured.

[0072] A method for manufacturing a product according to a seventh aspect of the present invention has the same configuration as the method for manufacturing a product according to the sixth aspect described above, in which the product is a disc brake plate.

[0073] [Additional Notes] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. [Explanation of symbols]

[0074] 1: mounting device, 3: pressing jig, 5: driving mechanism, 7: control unit, 8: alarm unit, 31: base unit, 31a: first main surface, 31b: second main surface, 32: chuck unit, 33: contact body, 35: force sensor, 51: pressing cylinder, 52: mounting unit, 200: turning machine, 400: turning object

Claims

1. A mounting device for mounting an object to be turned on a turning machine, comprising: a pressing jig for pressing the object to be turned against the turning machine; The pressing jig includes: A contact body capable of contacting the workpiece; a force sensor that detects, via the contact body, a force in a pressing direction acting on the workpiece from the turning machine and a torque around an axis perpendicular to the pressing direction; is attached, Mounting device.

2. The pressing jig is A flat base portion extending in a direction perpendicular to the pressing direction; a chuck portion for gripping the workpiece to be turned, the chuck portion being attached to a first main surface of the base portion, the first main surface being a main surface on which the contact body is attached, out of two main surfaces of the base portion; It has the force sensor is attached to a second principal surface of the base portion, the second principal surface being an opposite principal surface to the first principal surface; The contact body is a rod-shaped structure extending along the pressing direction, and a plurality of contact bodies are provided at equal intervals along a virtual circle centered on the chuck portion. The mounting device according to claim 1 .

3. and an alarm unit that issues a predetermined signal when at least one of the force in the pressing direction and the torque around an axis perpendicular to the pressing direction detected by the force sensor exceeds a predetermined numerical range. The mounting device according to claim 1 .

4. The turning object is a disk-shaped casting having a draft angle. The mounting device according to claim 1 .

5. A method for mounting an object to be turned on a turning machine, comprising the steps of: a pressing step of pressing the object to be turned against the turning machine; a detection step of detecting, after the pressing step, a force in a pressing direction acting on the turning object from the turning machine and a torque around an axis perpendicular to the pressing direction by a force sensor; Including, How to wear.

6. A method for manufacturing a product, comprising a mounting step of mounting the turned object, which is to be a base material of the product, on the turning machine using the mounting method according to claim 5.

7. The product is a disc brake plate. A method for producing the product according to claim 6.

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