Wire saw

Abstract

The application relates to the technical field of wire cutting, and particularly provides a wire cutting machine, which aims to solve the problem of how to improve cutting quality while ensuring cutting efficiency. To this end, the wire cutting machine comprises a rack assembly, a cutting assembly, a feeding device, a first driving device and a second driving device. The cutting assembly comprises a main frame, a cutting main roller and a cutting wire. The feeding device is arranged on the rack assembly, and a crystal holder for mounting a piece to be cut is arranged on the feeding device. The feeding device is used for driving the piece to be cut to make a linear feeding motion towards the cutting wire. The first driving device is used for driving the crystal holder to make a reciprocating swing motion relative to the cutting wire. The second driving device is used for driving the crystal holder to make a reciprocating linear motion relative to the cutting wire in a set direction, and the set direction is perpendicular to the direction of the linear feeding motion, so as to at least partially offset the motion component of the reciprocating swing motion in the direction perpendicular to the linear feeding motion. The application can reduce the warping degree of a formed sheet on the basis of improving the cutting efficiency, and improve the cutting quality.

Description

Technical Field

[0001] This application relates to the field of wire cutting technology, specifically providing a wire cutting machine. Background Technology

[0002] Wire EDM is a processing method that uses a cutting wire that reciprocates at high speed and moves relative to the workpiece to be cut (such as photovoltaic silicon rods, semiconductors, silicon carbide, sapphire, magnetic materials, etc.) to cut the workpiece.

[0003] In actual processing, the cutting wire needs to have a certain tension to ensure cutting quality. For large-sized and / or high-hardness workpieces, the increased size of the workpiece leads to a larger contact area with the cutting wire, thus requiring a greater cutting force. The increased hardness of the workpiece also requires a greater cutting force per unit area. Therefore, to ensure the cutting force required during the cutting process, the cutting wire often needs to provide greater tension. However, excessive tension increases the risk of wire breakage, making it difficult to guarantee cutting quality.

[0004] Accordingly, a new technical solution is needed in this field to solve the above problems. Utility Model Content

[0005] This application aims to solve the aforementioned technical problem, namely, how to improve cutting quality while ensuring cutting efficiency.

[0006] Therefore, this application provides a wire cutting machine, which includes:

[0007] Rack assembly;

[0008] A cutting assembly, comprising a main frame disposed on the frame assembly, a main cutting roller disposed on the main frame, and a cutting line wound around the main cutting roller;

[0009] A feeding device is mounted on the frame assembly. The feeding device is provided with a crystal holder for mounting the workpiece to be cut. The feeding device is used to drive the workpiece to be cut to make a linear feeding motion toward the cutting line.

[0010] A first driving device is used to drive the crystal holder to reciprocate oscillating motion relative to the cutting line;

[0011] The second driving device is used to drive the crystal holder to reciprocate linearly relative to the cutting line in a set direction, the set direction being perpendicular to the direction of the linear feed motion, so as to at least partially offset the motion component of the reciprocating oscillating motion along the direction perpendicular to the linear feed motion.

[0012] In one technical solution of the above-mentioned wire cutting machine, the first driving device is disposed on the feeding device and is used to drive the crystal holder to perform reciprocating oscillating motion.

[0013] The second drive device is mounted on the frame assembly and is used to drive the cutting line to reciprocate linearly in a set direction.

[0014] In one technical solution of the above-mentioned wire EDM machine, the crystal holder is provided with an arc-shaped guide rail, the feeding device is provided with an arc-shaped groove adapted to the arc-shaped guide rail, and the first driving device includes:

[0015] A first actuator, connected to the arc-shaped guide rail, is used to drive the arc-shaped guide rail to slide along the arc-shaped groove, thereby realizing the reciprocating oscillating motion; and / or

[0016] The frame assembly is provided with a first linear guide rail, the main frame is slidably mounted on the first linear guide rail, and the second drive device includes:

[0017] The second driver, which is connected to the main frame, is used to drive the main frame to slide along the first linear guide rail, thereby realizing the reciprocating linear motion.

[0018] In one technical solution of the above-mentioned wire cutting machine, the first driving device is disposed on the feeding device and is used to drive the crystal holder to perform reciprocating oscillating motion.

[0019] The second drive device is mounted on the frame assembly and is used to drive the feed device to perform reciprocating linear motion in a set direction.

[0020] In one technical solution of the above-mentioned wire EDM machine, the crystal holder is provided with an arc-shaped guide rail, the feeding device is provided with an arc-shaped groove adapted to the arc-shaped guide rail, and the first driving device includes:

[0021] A first actuator, connected to the arc-shaped guide rail, is used to drive the arc-shaped guide rail to slide along the arc-shaped groove, thereby realizing the reciprocating oscillating motion; and / or

[0022] The frame assembly is provided with a second linear guide rail, the feeding device is slidably mounted on the second linear guide rail, and the second driving device includes:

[0023] The third driver, which is connected to the feeding device, is used to drive the feeding device to slide along the second linear guide rail, thereby realizing the reciprocating linear motion.

[0024] In one technical solution of the above-mentioned wire cutting machine, the first driving device is disposed on the frame assembly and is used to drive the cutting wire to perform reciprocating oscillating motion.

[0025] The second drive device is mounted on the frame assembly and is used to drive the feed device to perform reciprocating linear motion in a set direction.

[0026] In one technical solution of the above-mentioned wire EDM machine, the main frame is rotatably mounted on the frame assembly, and there is a gap between the line connecting the cross-sectional axes of two adjacent cutting main rollers and the rotation axis of the main frame. The first driving device includes:

[0027] The fourth driver is used to drive the main frame to rotate, thereby causing the cutting segment of the cutting line to perform the reciprocating oscillating motion relative to the cross-sectional axis of the main frame.

[0028] The frame assembly is provided with a third linear guide rail, the feeding device is slidably mounted on the third linear guide rail, and the second driving device includes:

[0029] The fifth driver, which is connected to the feeding device, is used to drive the feeding device to slide along the third linear guide rail, thereby realizing the reciprocating linear motion.

[0030] In one technical solution of the above-mentioned wire cutting machine, the first driving device is disposed on the frame assembly and is used to drive the cutting wire to perform reciprocating oscillating motion.

[0031] The second drive device is mounted on the frame assembly and is used to drive the cutting line to reciprocate linearly in a set direction.

[0032] In one technical solution of the above-mentioned wire EDM machine, the main frame is rotatably mounted on the frame assembly, and there is a gap between the line connecting the cross-sectional axes of two adjacent cutting main rollers and the rotation axis of the main frame. The first driving device includes:

[0033] The fourth driver is used to drive the main frame to rotate, thereby causing the cutting segment of the cutting line to perform the reciprocating oscillating motion relative to the cross-sectional axis of the main frame.

[0034] The wire cutting machine further includes a sub-frame, the main frame is rotatably mounted on the sub-frame, the frame assembly is provided with a fourth linear guide rail, the sub-frame is slidably mounted on the fourth linear guide rail, and the second driving device includes:

[0035] The sixth actuator, which is connected to the sub-frame, is used to drive the main frame and the cutting line to slide along the fourth linear guide rail, thereby realizing the reciprocating linear motion.

[0036] In one technical solution of the aforementioned wire EDM machine, the feeding device is located above the cutting assembly, and the feeding device drives the crystal holder to feed downwards in a straight line; or

[0037] The feeding device is located below the cutting assembly, and the feeding device drives the crystal holder to feed upward in a straight line.

[0038] As described above, in the wire cutting process, this application adds a reciprocating linear motion between the workpiece to be cut and the cutting segment to achieve "oscillating cutting" through reciprocating oscillating motion. This reduces or completely cancels the motion component in the direction perpendicular to the linear feed caused by the reciprocating oscillating motion, and improves the interference between the workpiece to be cut and the peripheral structures such as the cutting main roller that may be caused by the reciprocating oscillating motion. Thus, when cutting large-size / high-hardness sheets, it can not only reduce the contact area between the cutting line and the workpiece to be cut at any time during the cutting process and improve the cutting efficiency, but also reduce the axial spacing of the cutting main roller, ensure the rigidity of the cutting segment of the cutting line, thereby reducing the warpage of the formed sheet and improving the cutting quality.

[0039] In addition, this application can reduce the axial spacing of the cutting main roller, thereby improving the compactness between various functional components in the wire EDM machine and reducing the space occupied by the wire EDM machine. Attached Figure Description

[0040] The preferred embodiments of this application are described below with reference to the accompanying drawings, in which:

[0041] Figure 1 This is a schematic diagram of a wire cutting machine according to an embodiment of this application;

[0042] Figure 2 yes Figure 1 Side view;

[0043] Figure 3 yes Figure 1 A magnified view of part A in the middle;

[0044] Figure 4 Based on Figure 1 A schematic diagram illustrating the connection relationship between the first driver and the arc-shaped guide rail in the illustrated embodiment;

[0045] Figure 5 This is a schematic diagram of a wire cutting machine according to an embodiment of this application;

[0046] Figure 6 yes Figure 1 Side view;

[0047] Figure 7 Based on Figure 5 A schematic diagram illustrating the connection relationship between the fourth driver and the main frame in the illustrated embodiment;

[0048] Figure 8This is a schematic diagram showing the connection relationship between the cutting assembly and the frame assembly according to an embodiment of this application;

[0049] Figure 9 This is a flowchart of the main steps of a wire cutting method according to an embodiment of this application;

[0050] Figure 10 This is a schematic diagram showing the relative positions of the workpiece to be cut and the cutting segment during the cutting process according to the first embodiment of this application.

[0051] Figure 11 This is a schematic diagram showing the relative positions of the workpiece to be cut and the cutting segment during the cutting process according to the second embodiment of this application.

[0052] Figure 12 This is a schematic diagram showing the relative positions between the workpiece to be cut and the cutting segment during the cutting process according to the third embodiment of this application.

[0053] Figure 13 This is a schematic diagram showing the relative positions between the workpiece to be cut and the cutting segment during the cutting process according to the fourth embodiment of this application.

[0054] In the figure, the reference numerals refer to the following:

[0055] 1. Frame assembly; 11. First linear guide rail; 12. Third linear guide rail; 13. Fourth linear guide rail; 2. Cutting assembly; 21. Main frame; 22. Main cutting roller; 23. Cutting line; 24. Sub-frame; 3. Feeding device; 31. Arc groove; 4. Crystal holder; 41. Arc guide rail; 5. First drive device; 51. First driver; 52. Transmission body; 53. Transmission gear; 54. Driving wheel; 55. Driven wheel; 56. Fourth driver; 57. Drive wheel; 6. Second drive device; 61. Second driver; 62. Fifth driver; 63. Sixth driver.

[0056] 100, workpiece to be cut; 110, first swing center; 200, cutting segment; 210, second swing center. Detailed Implementation

[0057] Preferred embodiments of this application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this application and are not intended to limit the scope of protection of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0058] It should be noted that in the description of this application, terms such as "upper," "lower," "left," "right," "inner," and "outer," which indicate direction or positional relationship, are based on the direction or positional relationship shown in the accompanying drawings. These terms are used merely for ease of description and do not indicate or imply that the relevant device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, ordinal numbers such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0059] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0060] To facilitate understanding of the technical solution of this application, a brief introduction to some technical terms involved in the field of wire EDM is provided first:

[0061] Main cutting motion: The movement of the cutting line along its axis. The main cutting motion can be a reciprocating motion of the cutting line along its axis, or a unidirectional motion of the cutting line along its axis.

[0062] Linear feed motion: The motion of the workpiece to be cut continuously moving closer to the cutting line, which makes the entire workpiece continuously engaged in cutting.

[0063] Cutting segment: The part of the cutting line or cutting wire mesh that directly cuts the workpiece to be cut, that is, the length of the cutting line between two adjacent cutting main rollers constitutes the cutting segment.

[0064] Currently, wire EDM is widely used in the cutting of hard and brittle materials such as wafers and sapphire due to its advantages such as low kerf loss and high sheet production efficiency. However, wire EDM requires the cutting wire to have a certain tension, especially for large-sized and high-hardness workpieces. The increase in the size or hardness of the workpiece makes the cutting wire need to have a higher tension to meet the cutting force required during the cutting process. However, excessive tension will increase the risk of wire breakage and affect the smooth progress of the cutting process.

[0065] Therefore, some related technologies have begun to adopt an oscillating cutting method for slicing. That is, while the workpiece to be cut is fed linearly relative to the cutting line, the workpiece to be cut and the cutting line are controlled to oscillate relative to each other. In this way, at any moment during the cutting process, the length of the cutting line involved in the cutting becomes shorter, and the contact area between the cutting line and the workpiece to be cut is reduced. This oscillating cutting method can reduce the contact area between the workpiece to be cut and the cutting line while keeping the tension constant, thereby increasing the cutting force of the cutting line acting on the unit area of ​​the workpiece to be cut and meeting the cutting requirements.

[0066] However, when using the aforementioned oscillating cutting method, to avoid interference with surrounding structures during the oscillation process, it is necessary to increase the length of the cutting segment of the cutting line or cutting mesh and increase the axial distance between the two main cutting rollers constituting the cutting segment. This will reduce the rigidity of the cutting segment, leading to increased warping of the cut sheet and affecting the cutting quality. It is understandable that the larger the oscillation amplitude of the oscillation cutting, the larger the axial distance between adjacent main cutting rollers, and the more pronounced the aforementioned effects. Furthermore, limiting the oscillation amplitude makes it difficult to further meet the cutting requirements of larger sizes and / or higher hardness materials.

[0067] Based on this, refer to Figure 1 and Figure 2 This application discloses a wire cutting machine. Figure 1 This is a schematic diagram of a wire cutting machine according to an embodiment of this application. Figure 2 for Figure 1 The side view shows that the wire EDM machine includes a frame assembly 1, a cutting assembly 2, a feeding device 3, a crystal holder 4, a first drive device 5, and a second drive device 6.

[0068] The frame assembly 1 is the overall frame of the wire EDM machine, responsible for supporting the cutting assembly 2, the feeding device 3, the crystal tray 4, the first drive device 5, the second drive device 6, and other necessary functional parts.

[0069] The cutting assembly 2 includes a main frame 21, a main cutting roller 22, and a cutting wire 23. The main frame 21 is mounted on the frame assembly 1. There are two main cutting rollers 22, which are rotatably mounted on the main frame 21 and can be driven to rotate by a driver (not shown in the figure). The main cutting roller 22 is provided with a groove, and the cutting wire 23 is wound around the main cutting roller 22 through the groove and can move reciprocally or unidirectionally at high speed.

[0070] It should be noted that although two main cutting rollers 22 are shown as an example in the accompanying drawings of this application, this does not constitute a limitation of this application. For example, in some other implementations, there may be three main cutting rollers 22, which are arranged in a triangular pattern. In addition, the cutting line 23 may be a closed single loop cutting line, or it may be a cutting line mesh formed by reciprocating winding between the main cutting rollers 22. When the cutting line 23 is a single cutting line, it is a single-line cutting method; when the cutting line 23 is a cutting line mesh, it is a multi-line cutting method. This application uses multi-line cutting as an example for illustrative purposes.

[0071] The feeding device 3 is mounted on the frame assembly 1, and the crystal holder 4 is mounted on the feeding device 3. The workpiece 100 to be cut is clamped and fixed on the crystal holder 4. The feeding device 3 is used to drive the crystal holder 4 to move linearly, thereby causing the workpiece 100 to be cut to move linearly towards the cutting line 23. In some embodiments, the feeding device 3 may be composed of a servo motor, a guide rail slider, etc. The structure and specific principle of the feeding device 3 and the crystal holder 4 are well known in the art and will not be described in detail in this application.

[0072] The first driving device 5 is used to drive the crystal holder 4 to reciprocate oscillating relative to the cutting line 23. It should be noted that the above-mentioned "the crystal holder 4 reciprocates oscillating relative to the cutting line 23" includes two cases: the crystal holder 4 reciprocates oscillating and the cutting line 23 reciprocates oscillating. That is, the reciprocating oscillating motion between the crystal holder 4 and the cutting line 23 is relative.

[0073] The second driving device 6 is used to drive the crystal holder 4 to reciprocate linearly relative to the cutting line 23 in a set direction. It should be noted that the above-mentioned "set direction" is perpendicular to the direction of linear feed motion, and the above-mentioned "the crystal holder 4 reciprocates linearly relative to the cutting line 23 in a set direction" includes two cases: the crystal holder 4 reciprocates linearly and the cutting line 23 reciprocates linearly. That is, the reciprocating linear motion between the crystal holder 4 and the cutting line 23 is relative.

[0074] By using the reciprocating linear motion described above to at least partially offset the motion component of the reciprocating oscillating motion in the direction perpendicular to the linear feed motion, the interference between the workpiece 100 to be cut and the surrounding structure can be reduced on the basis of "oscillating cutting". This can further reduce the axial spacing between adjacent cutting main rollers 22, or even keep the axial spacing between the cutting main rollers 22 unchanged.

[0075] Reference Figure 1 and Figure 2 In one implementation, a first drive device 5 is mounted on the feed device 3 to drive the feed device 3 to perform reciprocating oscillating motion, and a second drive device 6 is mounted on the frame assembly 1 to drive the cutting wire 23 to perform reciprocating linear motion in a set direction. Figure 2For example, in the figure, arrow X represents the reciprocating linear motion, arrow Z represents the linear feed motion, and arrow R represents the reciprocating oscillating motion.

[0076] In one embodiment, refer to Figure 2 and Figure 3 , Figure 3 for Figure 1 A partial enlarged view of section A shows that the crystal holder 4 is equipped with an arc-shaped guide rail 41. The lower end of the feeding device 3 has an arc-shaped groove 31 adapted to the arc-shaped guide rail 41. The arc-shaped guide rail 41 is slidably disposed within the arc-shaped groove 31. To ensure the stability of the crystal holder 4's movement relative to the feeding device 3, multiple arc-shaped guide rails 41 and arc-shaped grooves 31 can be provided. The first driving device 5 includes a first driver 51. The output end of the first driver 51 is connected to the arc-shaped guide rail 41 and is used to drive the arc-shaped guide rail 41 to slide along the arc-shaped groove 31, thereby realizing the reciprocating oscillating motion of the crystal holder 4 and the workpiece 100 to be cut.

[0077] Optionally, the first driver 51 can drive the arc-shaped guide rail 41 to move via an intermediate transmission assembly. For example, Figure 4 An exemplary implementation is provided, wherein the first driving device 5 further includes a transmission assembly, which includes a transmission body 52, a transmission gear 53, a driving wheel 54, and a driven wheel 55. The transmission body 52 is fixedly mounted on the crystal holder 4 and has teeth that mesh with the transmission gear 53. The transmission gear 53 and the driven wheel 55 are coaxially connected and rotatably mounted on the feeding device 3. The driving wheel 54 is connected to the output shaft of the first driver 51. The transmission between the driving wheel 54 and the driven wheel 55 can be in the form of belt drive, chain drive, gear drive, etc. The power output from the first driver 51 is transmitted to the transmission gear 53 through the driving wheel 54 and the driven wheel 55. Then, the transmission gear 53 drives the transmission body 52 to rotate. Since the transmission body 52 and the arc-shaped guide rail 41 are relatively fixed, the arc-shaped guide rail 41 slides relative to the arc-shaped groove 31. It should be noted that the structure of the transmission body 52 can be understood as a partial gear, and the arc-shaped guide rail 41 can also be understood as part of the wheel. The arc of this partial gear and the arc-shaped guide rail 41 are consistent, so that the transmission body 52 can drive the arc-shaped guide rail 41 to move synchronously.

[0078] Reference Figure 2 The frame assembly 1 is provided with a first linear guide rail 11, and the main frame 21 is slidably mounted on the first linear guide rail 11. The second drive device 6 includes a second driver 61, which is connected to the main frame 21 and is used to drive the main frame 21 to slide along the first linear guide rail 11, thereby realizing the reciprocating linear motion of the main frame 21. For example, in some implementations, the second driver 61 can be a servo motor, which drives the main frame 21 and the cutting line 23 thereon to move via a lead screw.

[0079] Figure 2 The diagram shows that the workpiece 100 to be cut has two extreme positions during its reciprocating oscillating motion (two dashed frames on either side of the solid outline formed by the workpiece 100), and the cutting line 23 also has two extreme positions during its reciprocating linear motion (the dashed frames on the left and right sides of the solid outline formed by the cutting main roller 22 and the cutting line). Furthermore, Figure 2 The swing center of the workpiece 100 to be cut is the center of the circle where the extended trajectory of the arc-shaped guide rail 41 is located (i.e. Figure 2 The intersection of the two radial dashed lines connected to the arc-shaped guide rail 41, but it should be noted that the swing center of the workpiece 100 to be cut is not limited to Figure 2 As shown, the oscillation center can also be located above the crystal holder 4, for example, when the concave side of the arc-shaped guide rail 41 faces upward (when...). Figure 2 The arc-shaped guide rail 41 rotates 180°, and the swing center is located above the crystal holder 4. At this time, the swing amplitude is large. In practical applications, those skilled in the art can adjust the position of the swing center according to actual needs to adapt to the cutting requirements.

[0080] As described above, the above embodiments exemplify the specific implementation of "the workpiece 100 to be cut and the crystal holder 4 reciprocating oscillating motion, and the main frame 21 and the cutting line 23 reciprocating linear motion". Of course, in other embodiments, "the workpiece 100 to be cut and the crystal holder 4 themselves reciprocating oscillating motion while simultaneously performing linear reciprocating motion" can also be adopted. In this case, the first driving device 5 is also disposed on the feeding device 3, driving the crystal holder 4 to reciprocate oscillating motion. The structural form of the first driving device 5 and its connection method with the crystal holder 4 can be the same as in the above embodiments. The second driving device 6 is disposed on the frame assembly 1 and is used to drive the feeding device 3 to perform reciprocating linear motion in a set direction. For example, the frame assembly 1 is provided with a second linear guide rail, and the entire feeding device 3 (the outer frame of the feeding device 3) is slidably disposed on the second linear guide rail. The second driving device 6 includes a third driver connected to the feeding device 3, and the third driver drives the feeding device 3 to perform reciprocating linear motion along the second linear guide rail.

[0081] In this way, the workpiece 100 to be cut performs a reciprocating linear motion while simultaneously performing a reciprocating oscillating motion, thereby offsetting the motion component of the reciprocating oscillating motion along the direction perpendicular to the linear feed motion.

[0082] Reference Figure 5 , Figure 6 and Figure 7 , Figure 7The diagram illustrates the connection between the first driving device according to one embodiment of this application and the main frame 21. In another embodiment, the first driving device 5 is mounted on the frame assembly 1 and drives the cutting line 23 to perform reciprocating oscillating motion. The second driving device 6 is mounted on the frame assembly 1 and drives the feed device 3 to perform reciprocating linear motion in a set direction. Figure 6 For example, in the figure, arrow X represents the reciprocating linear motion, arrow Z represents the linear feed motion, and arrow R represents the reciprocating oscillating motion.

[0083] The main frame 21 is a circular turntable structure and is rotatably mounted on the frame assembly 1. The first drive device 5 includes a fourth drive 56 and a drive wheel 57 connected to the output end of the fourth drive 56. The drive wheel 57 can be a gear, and correspondingly, the main frame 21 is a gear that meshes with the drive wheel 57. In this case, the drive wheel 57 is the driving gear, and the main frame 21 is the driven gear. The fourth drive 56 drives the main frame 21 to rotate through the drive wheel 57. Of course, the fourth drive 56 can also drive the main frame 21 to rotate through other means such as synchronous belt drive or chain drive, and this application does not limit this.

[0084] In the above case, there is a gap between the line connecting the cross-sectional axes of two adjacent cutting main rollers 22 and the rotation axis of the main frame 21. Thus, when the main frame 21 rotates, the two cutting main rollers 22 and the cutting line 23 reciprocate relative to the cross-sectional axis of the main frame 21. That is, the axis of the main frame 21 is the swing center of the reciprocating swing motion.

[0085] The second drive device 6 includes a fifth driver 62. A third linear guide rail 12 is provided on the frame assembly 1. The feed device 3 is slidably disposed on the third linear guide rail 12. The fifth driver 62 is connected to the third linear guide rail 12 and drives the feed device 3 to slide along the third linear guide rail 12, thereby realizing the above-mentioned reciprocating linear motion.

[0086] Figure 6 The paper also provides two extreme positions of the workpiece 100 to be cut during the reciprocating linear motion (two dashed frames on both sides of the solid outline formed by the workpiece 100 to be cut), and two extreme positions of the cutting line 23 during the reciprocating oscillating motion (dashed frames on both sides of the solid outline formed by the cutting main roller 22 and the cutting line 23). Figure 6 The cutting main roller 22 and the cutting line 23 are located on the upper side of the axis (swing center) of the main frame 21, but in actual applications, they can also be adjusted as needed so that the cutting main roller 22 and the cutting line 23 are located on the lower side of the axis of the main frame 21. This application does not limit this.

[0087] As described above, the embodiments exemplify a specific implementation method in which "the main frame 21 and the cutting line 23 perform reciprocating oscillating motion, while the workpiece 100 to be cut and the crystal holder 4 perform linear reciprocating motion." Of course, based on this, in other embodiments, a method can also be adopted where "the main frame 21 and the cutting line 23 themselves perform reciprocating oscillating motion while simultaneously performing linear reciprocating motion." In this case, the structural form of the first driving device 5 and its connection method with the main frame 21 can be the same as in the above embodiments. (Refer to...) Figure 8 The difference is that the cutting assembly 2 also includes a sub-frame 24, the main frame 21 is rotatably mounted on the sub-frame 24, the frame assembly 1 is provided with a fourth linear guide rail 13, and the sub-frame 24 is slidably mounted on the fourth linear guide rail 13. At this time, the second drive device 6 includes a sixth driver 63, which can also be connected to the sub-frame 24 by means of lead screw transmission, etc., to drive the sub-frame 24, the main frame 21 and the cutting line 23 to move synchronously along the fourth linear guide rail 13, thereby realizing reciprocating linear motion.

[0088] As can be seen, in the above method, the cutting line 23 performs reciprocating linear motion while making reciprocating oscillating motion, thereby canceling the motion component of the reciprocating oscillating motion in the direction perpendicular to the linear feed motion.

[0089] Furthermore, it should be noted that although the above embodiments are exemplified by the feeding device 3 being located above the cutting assembly 2 and driving the crystal tray 4 to feed downwards in a straight line, this does not constitute a limitation of this application. In some other embodiments, the feeding device 3 may also be located below the cutting assembly 2, that is, the feeding device 3 drives the crystal tray 4 to feed upwards in a straight line. Any adjustments made to the above relative positions should be within the scope of protection of this application.

[0090] This application also discloses a cutting method, which can be implemented by the wire cutting machine in any of the above embodiments.

[0091] Reference Figure 9 Here is a flowchart of the main steps of a cutting method according to an embodiment of this application, which includes:

[0092] S101: Controls the cutting line to perform the main cutting motion.

[0093] S102: During the linear feed motion of the workpiece to be cut toward the cutting line, the workpiece to be cut is made to reciprocate relative to the cutting line, while the workpiece to be cut or the cutting line is controlled to reciprocate linearly along a set direction, so as to at least partially offset the motion component of the reciprocating oscillation motion in the direction perpendicular to the linear feed motion.

[0094] In step S102, the direction is set to be perpendicular to the direction of the linear feed motion.

[0095] It should be noted that in step S102 above, "making the workpiece to be cut reciprocate relative to the cutting segment, while controlling the workpiece to be cut or the cutting segment to reciprocate linearly along a set direction" specifically includes four forms. Referring to the above embodiment of the wire cutting machine, these four forms are as follows:

[0096] The first method involves the workpiece to be cut reciprocating while the cutting section reciprocates in a linear motion along a set direction.

[0097] The second type: the workpiece to be cut makes a reciprocating oscillating motion while itself makes a reciprocating linear motion along a set direction.

[0098] The third type: while the cutting segment is making a reciprocating oscillating motion, the workpiece to be cut is making a reciprocating linear motion along a set direction.

[0099] The fourth type: while the cutting segment is oscillating back and forth, it is also oscillating back and forth in a linear direction.

[0100] The four forms mentioned above will be described below with reference to the accompanying drawings.

[0101] Reference Figure 10 This is a schematic diagram of the relative positions between the workpiece to be cut and the cutting segment during the cutting process according to an embodiment of this application, which corresponds to the first form described above.

[0102] As shown in the figure, the workpiece 100 to be cut has a first swing center 110, and the workpiece 100 to be cut reciprocates around the first swing center 110. For ease of explanation, [the following text is missing]. Figure 10 In the illustrated embodiment, the reciprocating oscillating motion of the workpiece 100 to be cut is referred to as the first reciprocating oscillating motion. Correspondingly, the cutting segment 200 performs a first reciprocating linear motion along a predetermined direction. The direction of the main cutting motion is perpendicular to the direction of the linear feed motion. Figure 10 Taking the perspective as an example, the direction of the linear feed motion is vertical, while the direction of the main cutting motion and the direction of the first reciprocating linear motion are both horizontal.

[0103] In the above manner, the motion period of the first reciprocating linear motion is equal to the motion period of the first reciprocating oscillating motion, and at any time, the velocity component of the first reciprocating oscillating motion along the cutting main motion direction is the same as the velocity direction of the first reciprocating linear motion.

[0104] This is because the "first reciprocating oscillating motion" causes a displacement component of the workpiece 100 in the main cutting motion direction, which may lead to interference between the workpiece 100 and surrounding structures such as the main cutting roller. Therefore, in the above method, it is necessary to ensure that the velocity component of the first reciprocating oscillating motion along the main cutting motion direction is "the same" as the velocity direction of the first reciprocating linear motion. For example, during the leftward oscillation of the workpiece 100, the cutting segment 200 also moves linearly to the left. Only in this way can the workpiece 100 and surrounding structures such as the main cutting roller be kept within a safe distance range, preventing interference. In this way, the first reciprocating linear motion at least partially cancels out the motion component of the first reciprocating oscillating motion along the direction perpendicular to the linear feed motion (i.e., the main cutting motion direction).

[0105] Accordingly, it is understood that in order to always ensure that the workpiece to be cut 100 and the surrounding structures such as the cutting main roller are always kept within the above-mentioned safe distance range, the motion cycle of the first reciprocating linear motion must be the same as the motion cycle of the first reciprocating oscillating motion.

[0106] When the above method is adopted, step S102 is specifically as follows: during the process of the workpiece to be cut making a linear feed motion toward the cutting line, the workpiece to be cut makes a first reciprocating oscillation motion around the first oscillation center, while controlling the cutting segment to make a first reciprocating linear motion along the set direction, at least partially offsetting the motion component of the first reciprocating oscillation motion in the direction perpendicular to the linear feed motion.

[0107] Further, in step S102, at any given time, the magnitude of the component velocity of the first reciprocating oscillating motion along the main cutting motion direction is equal to the magnitude of the velocity of the first reciprocating linear motion. Thus, within each cycle of the first reciprocating linear motion of the first reciprocating oscillating motion, the first reciprocating linear motion can completely cancel out the motion component of the first reciprocating oscillating motion along the direction perpendicular to the linear feed motion. In this case, the axial distance between adjacent cutting main rollers can remain unchanged, and the "oscillating cutting" method will not cause interference between the workpiece 100 to be cut and the surrounding structures such as the cutting main rollers. In this embodiment, the magnitude of the component velocity of the first reciprocating oscillating motion along the main cutting motion direction refers to the velocity magnitude of the point on the cross-section of the workpiece 100 furthest from the first oscillation center 110.

[0108] Reference Figure 10Both the cutting segment 200 and the workpiece 100 have an initial position and two extreme positions during their movement (shown by the dashed boxes in the figure). In some implementations, the relative position between the wire EDM feed device and the cutting assembly is controlled such that, in the initial position, the first swing center 110 is located on the vertical axis of the cutting segment 200. Thus, when the workpiece 100 is in the initial position, the distance between it and the two main cutting rollers is equal, resulting in a more rational spatial layout and minimizing the axial distance between the two main cutting rollers.

[0109] Furthermore, the two extreme positions of both the cutting segment 200 and the workpiece 100 to be cut are symmetrical with respect to the vertical axis of the cutting segment 200. In this way, the trajectories of the first reciprocating oscillating motion and the first reciprocating linear motion are symmetrical, which can maximize the oscillation amplitude of the first reciprocating oscillating motion and improve cutting efficiency under the premise that the axial distance between the two cutting main rollers is constant.

[0110] Reference Figure 11 This is a schematic diagram of the relative positions between the workpiece to be cut and the cutting segment during the cutting process according to another embodiment of this application, which corresponds to the second form described above.

[0111] As shown in the figure, the workpiece 100 to be cut also has a first swing center 110, and the workpiece 100 to be cut also performs a first reciprocating swing motion around the first swing center 110. The difference from the first form is that the workpiece 100 to be cut itself performs a second reciprocating linear motion along a set direction. The direction of this second reciprocating linear motion is parallel to the direction of the first reciprocating linear motion in the first form.

[0112] Similarly, in Figure 11 In the illustrated embodiment, the period of the second reciprocating linear motion is equal to the period of the first reciprocating oscillating motion. However, unlike the first form described above, the velocity component of the first reciprocating oscillating motion along the main cutting direction is opposite to the velocity direction of the second reciprocating linear motion. This is because the cutting segment 200 is fixed in the horizontal direction relative to the workpiece 100 to be cut. Therefore, the velocity direction of the second reciprocating linear motion needs to be opposite to the velocity component of the first reciprocating oscillating motion along the main cutting direction. For example, during the leftward oscillation of the workpiece 100, its entire structure needs to move linearly to the right. This reduces or eliminates the displacement of the workpiece 100 itself in the main cutting direction, ensuring that the workpiece 100 and the surrounding structures such as the cutting roller are always kept within a safe distance range, preventing interference.

[0113] When the above method is adopted, step S102 is specifically as follows: during the process of the workpiece to be cut making a linear feed motion toward the cutting segment of the cutting line, the workpiece to be cut makes a first reciprocating oscillation motion around the first oscillation center, while controlling the workpiece to be cut to make a second reciprocating linear motion along the set direction, so as to at least partially offset the motion component of the second reciprocating oscillation motion in the direction perpendicular to the linear feed motion.

[0114] Furthermore, in step S102, at any given time, the magnitude of the velocity component of the first reciprocating oscillating motion along the cutting main motion direction is equal to the magnitude of the velocity of the second reciprocating linear motion. This is also to ensure that the second reciprocating linear motion completely cancels out the motion component of the first reciprocating oscillating motion along the direction perpendicular to the linear feed motion, which will not be elaborated upon here.

[0115] Similarly, in order to minimize the axial spacing of the cutting main roller, the first swing center 110 is located on the vertical line of the cutting section 200.

[0116] The workpiece 100 to be cut has an initial position and two extreme positions during its movement. Figure 11 (As shown by the dashed boxes on both sides of the workpiece 100 to be cut), in order to maximize the swing amplitude of the reciprocating oscillation motion and improve the cutting efficiency, the two extreme positions are symmetrical with respect to the vertical line of the cutting segment 200.

[0117] In addition, in the above Figure 10 The first form shown and Figure 11 In the second form shown, the example is that the first swing center 110 is located above the workpiece 100 to be cut. However, this does not constitute a limitation of this application. For example, in some other implementations, the first swing center 110 may also be located within the cross-sectional coverage of the workpiece 100 to be cut, or below the workpiece 100 to be cut.

[0118] Reference Figure 12 This is a schematic diagram of the relative positions between the workpiece to be cut and the cutting segment during the cutting process according to another embodiment of this application, which corresponds to the third form described above.

[0119] As shown in the figure, in this embodiment, the cutting segment 200 has a second swing center 210, and the cutting segment 200 reciprocates around the second swing center 210. For ease of explanation, [the following text is missing]. Figure 12 In the illustrated embodiment, the reciprocating oscillating motion of the cutting segment 200 is referred to as the second reciprocating oscillating motion. Meanwhile, the workpiece 100 to be cut performs a reciprocating linear motion along a predetermined direction. For ease of explanation, [the following is a simplified description]. Figure 12 In the illustrated embodiment, the reciprocating linear motion of the workpiece 100 to be cut is referred to as the third reciprocating linear motion. Similarly, the direction of the main cutting motion is perpendicular to the direction of the linear feed motion. Figure 12Taking the perspective as an example, the direction of the linear feed motion is vertical, while the direction of the main cutting motion and the direction of the third reciprocating linear motion are both horizontal.

[0120] In the above manner, the period of the third reciprocating linear motion is equal to the period of the second reciprocating oscillating motion, and at any given moment, the velocity component of the second reciprocating oscillating motion along the cutting main motion direction is the same as the velocity direction of the third reciprocating linear motion. The principle is similar to the first method described above; the velocity component of the second reciprocating oscillating motion along the cutting main motion direction must be the same as the velocity direction of the third reciprocating linear motion for the third reciprocating linear motion to at least partially offset the motion component of the second reciprocating oscillating motion along the direction perpendicular to the linear feed motion.

[0121] When the above method is adopted, step S102 is specifically as follows: during the process of the workpiece to be cut making a linear feed motion toward the cutting line, the cutting segment is made to make a second reciprocating oscillation motion around the second oscillation center, while the workpiece to be cut is controlled to make a third reciprocating linear motion along the set direction, at least partially offsetting the motion component of the second reciprocating oscillation motion in the direction perpendicular to the linear feed motion.

[0122] Furthermore, at any given moment, the magnitude of the velocity component of the second reciprocating oscillating motion along the direction perpendicular to the linear feed motion is equal to the magnitude of the velocity of the third reciprocating linear motion, so that the third reciprocating linear motion can completely cancel out the motion component of the second reciprocating oscillating motion along the direction perpendicular to the linear feed motion.

[0123] Reference Figure 12 Both the cutting segment 200 and the workpiece 100 have an initial position and two extreme positions during their movement (shown by the dashed boxes in the figure). Similarly, in order to minimize the axial distance between the two main cutting rollers, the second oscillation center 210 is located on the vertical axis of the cutting segment 200 in the initial position. To maximize the oscillation amplitude of the second reciprocating oscillation motion and improve cutting efficiency, the two extreme positions of the cutting segment 200 and the workpiece 100 are symmetrical with respect to the vertical axis of the cutting segment 200.

[0124] Reference Figure 13 This is a schematic diagram of the relative positions between the workpiece to be cut and the cutting segment during the cutting process according to an embodiment of this application, which corresponds to the fourth form described above.

[0125] As shown in the figure, the cutting segment 200 also has a second swing center 210, and the cutting segment 200 also performs a second reciprocating swing motion around the second swing center 210. The difference from the third form is that the cutting segment 200 itself performs a fourth reciprocating linear motion along a set direction. The direction of this fourth reciprocating linear motion is parallel to the direction of the third reciprocating linear motion in the third form described above.

[0126] Similarly, in Figure 13 In the illustrated embodiment, the period of the fourth reciprocating linear motion is equal to the period of the second reciprocating oscillating motion, and at any given time, the velocity component of the second reciprocating oscillating motion along the direction perpendicular to the linear feed motion is opposite to the velocity direction of the fourth reciprocating linear motion. This is because the workpiece 100 to be cut is fixed in the horizontal direction relative to the cutting segment; therefore, the velocity direction of the fourth reciprocating linear motion needs to be opposite to the velocity component of the second reciprocating oscillating motion along the main cutting motion direction. The principle is similar to the second method described above, and will not be elaborated further here.

[0127] When the above method is adopted, step S102 is specifically as follows: during the process of the cutting segment of the workpiece to be cut making a linear feed motion toward the cutting line, the cutting segment makes a second reciprocating oscillation motion around the second oscillation center, and at the same time controls the cutting segment to make a fourth reciprocating linear motion along the set direction, so as to at least partially offset the motion component of the second reciprocating oscillation motion in the direction perpendicular to the linear feed motion.

[0128] Furthermore, in step S102, at any given time, the magnitude of the velocity component of the second reciprocating oscillating motion along the direction perpendicular to the linear feed motion is equal to the magnitude of the velocity of the fourth reciprocating linear motion. This is also to ensure that the fourth reciprocating linear motion completely cancels out the motion component of the second reciprocating oscillating motion along the direction perpendicular to the linear feed motion, which will not be elaborated upon here.

[0129] The cutting segment 200 has an initial position and two extreme positions during its movement. Figure 13 Similarly, to minimize the axial spacing of the main cutting rollers, the second oscillation center 210 is positioned on the vertical axis of the cutting section 200 in the initial position. To maximize the oscillation amplitude of the second reciprocating oscillation motion and improve cutting efficiency, the two extreme positions are symmetrical with respect to the vertical axis of the cutting section 200. (The two dashed boxes on both sides of the middle cutting section 200)

[0130] As described above, in the wire EDM process, this application adds a reciprocating linear motion between the workpiece 100 to be cut and the cutting segment 200 to achieve "oscillating cutting" through reciprocating oscillating motion. This reduces or completely cancels the motion component in the direction perpendicular to the linear feed caused by the reciprocating oscillating motion, and improves the interference phenomenon between the workpiece 100 to be cut and the peripheral structures such as the cutting main roller that may be caused by the reciprocating oscillating motion. In this way, when cutting large-size / high-hardness sheets, it can not only reduce the contact area between the cutting line and the workpiece to be cut at any time during the cutting process and improve the cutting efficiency, but also reduce the axial spacing of the cutting main roller, ensure the rigidity of the cutting segment of the cutting line, thereby reducing the warpage of the formed sheet and improving the cutting quality.

[0131] In practical applications, depending on the size and / or material of the workpiece to be cut, the swing center and swing amplitude of the reciprocating oscillating motion can be adjusted. Correspondingly, the motion parameters of the reciprocating linear motion (including the extreme endpoint position, motion speed, motion period, etc.) can be adaptively adjusted to match the motion parameters of the reciprocating oscillating motion.

[0132] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. A wire cutting machine, characterized in that, include: Rack assembly; A cutting assembly, comprising a main frame disposed on the frame assembly, a main cutting roller disposed on the main frame, and a cutting line wound around the main cutting roller; A feeding device is mounted on the frame assembly. The feeding device is provided with a crystal holder for mounting the workpiece to be cut. The feeding device is used to drive the workpiece to be cut to make a linear feeding motion toward the cutting line. A first driving device is used to drive the crystal holder to reciprocate oscillating motion relative to the cutting line; The second driving device is used to drive the crystal holder to reciprocate linearly relative to the cutting line in a set direction, the set direction being perpendicular to the direction of the linear feed motion, so as to at least partially offset the motion component of the reciprocating oscillating motion along the direction perpendicular to the linear feed motion.

2. The wire cutting machine according to claim 1, characterized in that, The first driving device is mounted on the feeding device and is used to drive the crystal holder to perform reciprocating oscillating motion; The second drive device is mounted on the frame assembly and is used to drive the cutting line to reciprocate linearly in a set direction.

3. The wire cutting machine according to claim 2, characterized in that, The crystal holder is provided with an arc-shaped guide rail, and the feeding device is provided with an arc-shaped groove adapted to the arc-shaped guide rail. The first driving device includes: A first actuator, connected to the arc-shaped guide rail, is used to drive the arc-shaped guide rail to slide along the arc-shaped groove, thereby realizing the reciprocating oscillating motion; and / or The frame assembly is provided with a first linear guide rail, the main frame is slidably mounted on the first linear guide rail, and the second drive device includes: The second driver, which is connected to the main frame, is used to drive the main frame to slide along the first linear guide rail, thereby realizing the reciprocating linear motion.

4. The wire cutting machine according to claim 1, characterized in that, The first driving device is mounted on the feeding device and is used to drive the crystal holder to perform reciprocating oscillating motion; The second drive device is mounted on the frame assembly and is used to drive the feed device to perform reciprocating linear motion in a set direction.

5. The wire cutting machine according to claim 4, characterized in that, The crystal holder is provided with an arc-shaped guide rail, and the feeding device is provided with an arc-shaped groove adapted to the arc-shaped guide rail. The first driving device includes: A first actuator, connected to the arc-shaped guide rail, is used to drive the arc-shaped guide rail to slide along the arc-shaped groove, thereby realizing the reciprocating oscillating motion; and / or The frame assembly is provided with a second linear guide rail, the feeding device is slidably mounted on the second linear guide rail, and the second driving device includes: The third driver, which is connected to the feeding device, is used to drive the feeding device to slide along the second linear guide rail, thereby realizing the reciprocating linear motion.

6. The wire cutting machine according to claim 1, characterized in that, The first drive device is mounted on the frame assembly and is used to drive the cutting wire to perform reciprocating oscillating motion; The second drive device is mounted on the frame assembly and is used to drive the feed device to perform reciprocating linear motion in a set direction.

7. The wire cutting machine according to claim 6, characterized in that, The main frame is rotatably mounted on the frame assembly, and there is a gap between the line connecting the cross-sectional axes of two adjacent cutting main rollers and the rotation axis of the main frame. The first driving device includes: The fourth driver is used to drive the main frame to rotate, thereby causing the cutting segment of the cutting line to perform the reciprocating oscillating motion relative to the cross-sectional axis of the main frame. The frame assembly is provided with a third linear guide rail, the feeding device is slidably mounted on the third linear guide rail, and the second driving device includes: The fifth driver, which is connected to the feeding device, is used to drive the feeding device to slide along the third linear guide rail, thereby realizing the reciprocating linear motion.

8. The wire cutting machine according to claim 1, characterized in that, The first drive device is mounted on the frame assembly and is used to drive the cutting wire to perform reciprocating oscillating motion; The second drive device is mounted on the frame assembly and is used to drive the cutting line to reciprocate linearly in a set direction.

9. The wire cutting machine according to claim 8, characterized in that, The main frame is rotatably mounted on the frame assembly, and there is a gap between the line connecting the cross-sectional axes of two adjacent cutting main rollers and the rotation axis of the main frame. The first driving device includes: The fourth driver is used to drive the main frame to rotate, thereby causing the cutting segment of the cutting line to perform the reciprocating oscillating motion relative to the cross-sectional axis of the main frame. The wire cutting machine further includes a sub-frame, the main frame is rotatably mounted on the sub-frame, the frame assembly is provided with a fourth linear guide rail, the sub-frame is slidably mounted on the fourth linear guide rail, and the second driving device includes: The sixth actuator, which is connected to the sub-frame, is used to drive the main frame and the cutting line to slide along the fourth linear guide rail, thereby realizing the reciprocating linear motion.

10. The wire cutting machine according to any one of claims 1 to 9, characterized in that, The feeding device is located above the cutting assembly, and the feeding device drives the crystal holder to feed downwards in a straight line; or The feeding device is located below the cutting assembly, and the feeding device drives the crystal holder to feed upward in a straight line.

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