An apparatus for automatically processing the concave arc surfaces at both ends of a fretboard of a guitar

Abstract

The utility model discloses an equipment of automatic processing guitar fretboard surface two end concave arc surface, including workstation, storage unit, feeding unit, auxiliary positioning unit, transverse movement unit, two processing units, workpiece movement unit and control system, the control system is through control line respectively with feeding unit, auxiliary positioning unit, transverse movement unit, two processing units and workpiece movement unit connection, two processing units are left -hand side processing unit and right -hand side processing unit respectively. The utility model only needs manual placement workpiece blank, and the processes such as feeding, sucking workpiece, processing workpiece, releasing workpiece are all machine automatic completion, and the production efficiency is greatly improved. The utility model carries out automatic profiling processing simultaneously to the concave arc surface of two ends of the upper surface of workpiece according to profiling die, guarantees the stability of workpiece processing quality. The utility model does not need manual holding blank to process, and eliminates the security risk.

Description

Technical Field

[0001] This utility model relates to the field of guitar processing technology, specifically to a device for automatically processing the concave arc surfaces at both ends of the guitar bridge surface. Background Technology

[0002] The upper surface of the guitar bridge has a convex arc surface in the middle section and concave arc surfaces at both ends. In the past, when processing the concave arc surfaces, a copying mold was generally used and the processing was done manually on a milling machine, resulting in low production efficiency. Due to manual operation and low precision of the mold and equipment, the product quality was unstable. The spinning of the cutting tool also posed a safety hazard to the operator. Utility Model Content

[0003] In view of the above-mentioned problems in the existing technology, this utility model proposes an automatic processing device for the concave arc surfaces at both ends of the guitar bridge surface, which can improve production efficiency, improve product stability and reduce safety risks.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An automatic processing device for the concave arc surfaces at both ends of a guitar bridge includes a worktable, a storage unit, a feeding unit, an auxiliary positioning unit, a lateral movement unit, two processing units, a workpiece movement unit, and a control system. The storage unit is installed on the front side of the worktable, the feeding unit is installed on the worktable and located in front of the storage unit, the auxiliary positioning unit is installed on the worktable and located behind the storage unit, the lateral movement unit is installed in the middle of the worktable and spans across the worktable in the front-back direction, the two processing units are installed on the rear side of the worktable, and the workpiece movement unit is installed on the middle-rear side of the worktable and moves along the front-back and left-right directions of the worktable. The control system is connected to the feeding unit, the auxiliary positioning unit, the lateral movement unit, the two processing units, and the workpiece movement unit via control lines. The two processing units are a left processing unit and a right processing unit, which have the same structure and are symmetrical.

[0006] Furthermore, the storage unit includes a storage box body, a storage box movable stop bar, a storage box movable baffle, a storage box locking screw, and a storage box fixed baffle. The storage box body is fixedly installed on the workbench. The storage box movable stop bar is installed on the right side of the storage box body, and the storage box fixed baffle is installed on the left side of the storage box body. The storage box movable baffle is installed on the left side of the storage box fixed baffle by the storage box locking screw. The workpiece blank is placed inside the storage box, and the left and right ends of the workpiece blank are in contact with the storage box movable stop bar and the storage box fixed baffle, respectively. Openings are provided on both the front and rear sides of the bottom of the box body. The height of the opening is greater than the thickness of one workpiece blank but less than the sum of the thicknesses of two workpiece blanks, and the length of the opening is greater than the length of one workpiece blank.

[0007] The feeding unit includes a feeding bracket, a feeding movable plate, a feeding cylinder, a feeding lower tongue, a feeding upper tongue, a workpiece transfer table, and an auxiliary positioning cylinder. The feeding bracket is fixedly mounted on the worktable. The feeding movable plate is slidably connected to the feeding bracket and moves back and forth along the feeding bracket. The fixed end of the feeding cylinder is fixed to the feeding bracket, and the moving end is connected to the feeding movable plate. The front end of the feeding lower tongue is mounted on the rear side of the feeding movable plate via a pressure spring, and the front end of the feeding upper tongue is mounted on the rear side of the feeding movable plate via a pressure spring and is located above the feeding lower tongue.

[0008] The auxiliary positioning unit includes a workpiece transfer table and an auxiliary positioning cylinder. The workpiece transfer table is fixedly installed on the workbench in front of the storage box. A horizontal positioning stop is set on the left side of the workpiece transfer table and a vertical positioning stop is set on the rear side. The auxiliary positioning cylinder is installed on the workbench to the right of the workpiece transfer table.

[0009] The lateral movement unit includes a lateral support, a lateral cylinder, a lateral movement bracket, a vertical cylinder, a vacuum generator, a lateral track, a finished workpiece suction cup, and a workpiece blank suction cup. The lateral support is a gantry support that spans the worktable in the front-to-back direction. The lateral movement bracket is slidably connected to the lateral track and moves back and forth along the track. The lateral track is fixed to the crossbeam of the lateral support. The fixed end of the lateral cylinder is fixed to the lateral support, and its moving end is connected to the lateral movement bracket. The vertical cylinder and the vacuum generator are both installed inside the lateral movement bracket. The fixed end of the vertical cylinder is fixed to the lateral movement bracket, and its moving end is connected to the vertical movement bracket. The lower front side of the vertical movement bracket is connected to the workpiece blank suction cup, and the lower rear side is connected to the finished workpiece suction cup. The vacuum generator is connected to both the workpiece blank suction cup and the finished workpiece suction cup via pipelines. The workpiece blank suction cup is a pressure suction cup.

[0010] The right-side machining unit includes a movable shaft, a movable base, a spindle motor, a template bearing, a spindle cutter, and a spindle base tension cylinder. The spindle motor is fixedly mounted on the movable base, and the right side of the movable base is mounted on the worktable via the movable shaft. The template bearing and the spindle cutter are mounted on the output shaft of the spindle motor. The fixed end of the spindle base tension cylinder is installed inside the worktable below the movable base, and the moving end is connected to the left side of the movable base.

[0011] The workpiece moving unit includes an X-axis moving motor, a Y-axis moving motor, a moving workpiece platform, a Y-axis track, a workpiece adsorption table, and a contouring mold. The Y-axis track is fixed to the worktable in the left-right direction, and the moving workpiece platform is slidably connected to the Y-axis track and moves along the left-right direction of the Y-axis track. The moving workpiece platform is connected to the Y-axis moving motor, which is mounted on the worktable. The X-axis track is fixed to the moving workpiece platform in the front-back direction, and the workpiece adsorption table is slidably connected to the X-axis track and moves along the front-back direction of the X-axis track. The workpiece adsorption table is connected to the X-axis moving motor, which is mounted on the moving workpiece platform. The contouring mold is fixedly installed in a mold mounting slot on the moving workpiece platform, and the workpiece adsorption table is used to adsorb the workpiece blank. The contouring mold includes a left mold and a right mold, which have the same structure and size and are symmetrical in shape.

[0012] Furthermore, the upper surface of the left mold has the same dimensions as the upper surface of the left end of the workpiece; two positioning cylinders are provided on the lower side of the left mold, and the two positioning cylinders are respectively connected to two positioning holes in the mold mounting groove on the moving workpiece platform.

[0013] Furthermore, the workpiece adsorption stage is connected to a vacuum generator via a pipeline.

[0014] Furthermore, a finished workpiece slide is provided on the rear side of the workbench, and a receiving box is provided below the finished workpiece slide.

[0015] Furthermore, the diameter of the template bearing is the same as the diameter of the cutting tool.

[0016] Furthermore, the lower feeding tongue, the upper feeding tongue, and the pressure spring constitute a feeding tongue assembly. There are two sets of the feeding tongue assembly, which are installed along the left-right direction on the right side of the feeding movable plate.

[0017] Furthermore, the moving workpiece platform is connected to the Y-axis moving motor via a lead screw and nut structure; the workpiece adsorption table is connected to the X-axis moving motor via a lead screw and nut structure.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] This invention only requires manual placement of the workpiece blank; the processes of feeding, picking up, processing, and releasing the workpiece are all completed automatically by the machine, greatly improving production efficiency.

[0020] This invention utilizes a contouring mold to simultaneously perform automated contouring processing on the concave arc surfaces at both ends of the upper surface of the workpiece, ensuring the stability of the workpiece processing quality.

[0021] This invention eliminates the need for manual handling of blanks during processing, thus eliminating safety hazards. Attached Figure Description

[0022] Figure 1 This is a schematic diagram (top view) of the structure of this utility model.

[0023] Figure 2 for Figure 1 Front view.

[0024] Figure 3 for Figure 1 The right view (item pickup status).

[0025] Figure 4 for Figure 1 The right view (placement status).

[0026] Figure 5 This is a schematic diagram of the shape of the contour mold.

[0027] In the diagram: 1. Movable base, 2. Spindle motor, 3. Movable shaft, 4. Template bearing, 5. Spindle cutter, 6. X-axis track, 7. Workpiece blank, 8. Workpiece transfer table, 9. Auxiliary positioning cylinder, 10. Moving workpiece platform, 11. Workpiece suction table, 12. Vertical positioning stop, 13. Horizontal positioning stop, 14. Storage box movable baffle, 15. Storage box locking screw, 16. Storage box fixed baffle, 17. Receiving box, 18. Feeding lower tongue, 19. Feeding upper tongue, 20. Feeding movable plate, 21. Feeding cylinder, 22. Copying mold, 23. Spindle base tension cylinder, 24. Horizontal cylinder, 25. Horizontal track, 26. Horizontal moving bracket, 27. Finished workpiece suction cup, 28. Workpiece blank suction cup, 29. Vacuum generator, 30. Vertical cylinder, 31. Finished workpiece slide. Detailed Implementation

[0028] The present invention will now be further described with reference to the accompanying drawings.

[0029] like Figure 1-5As shown, an automatic processing device for the concave arc surfaces at both ends of a guitar bridge includes a worktable, a storage unit, a feeding unit, an auxiliary positioning unit, a lateral movement unit, two processing units, a workpiece movement unit, and a control system. The storage unit is installed on the front side of the worktable, the feeding unit is installed on the worktable and located in front of the storage unit, the auxiliary positioning unit is installed on the worktable and located behind the storage unit, the lateral movement unit is installed in the middle of the worktable and spans across the worktable in the front-back direction, the two processing units are installed on the rear side of the worktable, and the workpiece movement unit is installed on the middle-rear side of the worktable and moves along the front-back and left-right directions of the worktable. The control system is connected to the feeding unit, the auxiliary positioning unit, the lateral movement unit, the two processing units, and the workpiece movement unit via control lines. The two processing units are a left processing unit and a right processing unit, which have the same structure and are symmetrical.

[0030] Furthermore, the storage unit includes a storage box body, a storage box movable stop bar, a storage box movable baffle 14, a storage box locking screw 15, and a storage box fixed baffle 16. The storage box body is fixedly installed on the workbench. The storage box movable stop bar is installed on the right side of the storage box body, and the storage box fixed baffle 16 is installed on the left side of the storage box body. The storage box movable baffle 14 is installed on the left side of the storage box fixed baffle 16 via the storage box locking screw 15. A workpiece blank 7 is placed inside the storage box body. The left and right ends of the workpiece blank 7 are in contact with the storage box movable stop bar and the storage box fixed baffle 16, respectively. Openings are provided on both the front and rear sides of the bottom of the box body. The height of the opening is greater than the thickness of one workpiece blank 7 and less than the sum of the thicknesses of two workpiece blanks 7. The length of the opening is greater than the length of one workpiece blank 7.

[0031] The feeding unit includes a feeding bracket, a feeding movable plate 20, a feeding cylinder 21, a feeding lower tongue 18, a feeding upper tongue 19, a workpiece transfer table 8, and an auxiliary positioning cylinder 9. The feeding bracket is fixedly installed on the worktable. The feeding movable plate 20 is slidably connected to the feeding bracket and moves back and forth along the feeding bracket. The fixed end of the feeding cylinder 21 is fixed to the feeding bracket, and the moving end is connected to the feeding movable plate 20. The front end of the feeding lower tongue 18 is installed on the rear side of the feeding movable plate 20 by a pressure spring, and the front end of the feeding upper tongue 19 is installed on the rear side of the feeding movable plate 20 by a pressure spring and is located above the feeding lower tongue 18.

[0032] The auxiliary positioning unit includes a workpiece transfer table 8 and an auxiliary positioning cylinder 9. The workpiece transfer table 8 is fixedly installed on the workbench in front of the storage box. A horizontal positioning stop 13 is provided on the left side of the workpiece transfer table 8 and a vertical positioning stop 12 is provided on the rear side. The auxiliary positioning cylinder 9 is installed on the workbench to the right of the workpiece transfer table 8.

[0033] The lateral movement unit includes a lateral support, a lateral cylinder 24, a lateral movement support 26, a vertical cylinder 30, a vacuum generator 29, a lateral track 25, a finished workpiece suction cup 27, and a workpiece blank suction cup 28. The lateral support is a gantry support that spans across the worktable in the front-to-back direction. The lateral movement support 26 is slidably connected to the lateral track 25 and moves back and forth along the lateral track 25. The lateral track 25 is fixed to the crossbeam of the lateral support. The fixed end of the lateral cylinder 24 is fixed to the lateral support and moves... The vertical cylinder 30 and the vacuum generator 29 are both installed inside the horizontal moving bracket 26. The fixed end of the vertical cylinder 30 is fixed on the horizontal moving bracket 26, and the moving end is connected to the vertical moving bracket. The lower front side of the vertical moving bracket is connected to the workpiece blank suction cup 28, and the lower rear side is connected to the workpiece finished suction cup 27. The vacuum generator 29 is connected to the workpiece blank suction cup 28 and the workpiece finished suction cup 27 through pipelines. The workpiece blank suction cup 28 is a pressure suction cup.

[0034] The right-side machining unit includes a movable shaft 3, a movable base 1, a spindle motor 2, a template bearing 4, a spindle cutter 5, and a spindle base tension cylinder 23. The spindle motor 2 is fixedly mounted on the movable base 1, and the right side of the movable base 1 is mounted on the worktable via the movable shaft 3. The template bearing 4 and the spindle cutter 5 are mounted on the output shaft of the spindle motor 2. The fixed end of the spindle base tension cylinder 23 is installed inside the worktable below the movable base 1, and the moving end is connected to the left side of the movable base 1.

[0035] The workpiece moving unit includes an X-axis moving motor, a Y-axis moving motor, a moving workpiece platform 10, a Y-axis track, a workpiece adsorption table 11, an X-axis track 6, and a contouring mold 22. The Y-axis track is fixed to the worktable in the left-right direction. The moving workpiece platform 10 is slidably connected to the Y-axis track and moves in the left-right direction along the Y-axis track. The moving workpiece platform 10 is connected to the Y-axis moving motor, which is mounted on the worktable. The X-axis track 6 is fixed to the moving workpiece platform 10 in the front-back direction. The workpiece adsorption table 11 is slidably connected to the X-axis track 6 and moves in the front-back direction along the X-axis track 6. The workpiece adsorption table 11 is connected to the X-axis moving motor, which is mounted on the moving workpiece platform 10. The contouring mold 22 is fixedly installed in the mold mounting slot on the moving workpiece platform 10. The workpiece adsorption table 11 is used to adsorb the workpiece blank 7. The contouring mold 22 includes a left mold and a right mold, which have the same structure and size and are symmetrical in shape.

[0036] Furthermore, the upper surface of the left mold has the same dimensions as the upper surface of the left end of the workpiece; two positioning cylinders are provided on the lower side of the left mold, and the two positioning cylinders are respectively connected to two positioning holes in the mold mounting groove on the moving workpiece platform 10.

[0037] Furthermore, the workpiece adsorption stage 11 is connected to the vacuum generator via a pipeline.

[0038] Furthermore, a finished workpiece slide 31 is provided on the rear side of the workbench, and a receiving box 17 is provided below the finished workpiece slide 31.

[0039] Furthermore, the diameter of the template bearing 4 is the same as the diameter of the cutting tool.

[0040] Furthermore, the lower feeding tongue 18, the upper feeding tongue 19, and the pressure spring constitute a feeding tongue assembly. There are two sets of the feeding tongue assembly, which are installed along the left-right direction on the right side of the feeding movable plate 20.

[0041] Furthermore, the moving workpiece platform 10 is connected to the Y-axis moving motor via a lead screw and nut structure; the workpiece adsorption table 11 is connected to the X-axis moving motor via a lead screw and nut structure.

[0042] The working method of this utility model is as follows:

[0043] A. Stack the workpiece blanks 7 in the storage box; install the contour mold 22 that matches the size of the workpiece in the mold mounting slot on the moving workpiece platform 10;

[0044] B. Power on each unit;

[0045] C. The control system controls the feeding cylinder 21 to move backward, so that the upper feeding tongue 19 enters the opening at the bottom of the storage box, and the lower feeding tongue 18 moves to the bottom of the storage box to support the bottom workpiece blank 7 in the storage box, and pushes the bottom workpiece blank 7 backward onto the workpiece transfer table 8, so that the rear side of the workpiece blank 7 contacts the vertical positioning stop 12.

[0046] D. The control system controls the moving end of the auxiliary positioning cylinder 9 to extend to the left, so that the left end of the workpiece blank 7 on the workpiece turntable 8 touches the transverse positioning stop 13; after the workpiece blank 7 is positioned, the control system controls the moving end of the auxiliary positioning cylinder 9 to retract.

[0047] E. The control system controls the workpiece blank suction cup 28 of the transverse moving unit to move to the workpiece transfer table 8 to adsorb the workpiece blank 7; at the same time, the workpiece finished product suction cup 27 adsorbs the workpiece finished product on the workpiece adsorption table 11.

[0048] F. The control system controls the workpiece blank suction cup 28 of the transverse moving unit to move to the workpiece adsorption table 11 to place the workpiece blank 7; at the same time, the workpiece finished product suction cup 27 puts the workpiece finished product down above the workpiece finished product slide, and the workpiece finished product slides into the receiving box 17.

[0049] G. The control system controls the workpiece adsorption table 11 to adsorb and fix the workpiece blank 7;

[0050] H. The control system controls the moving workpiece platform 10 to move to the spindle tool 5 and controls the workpiece adsorption table 11 to press against the copying mold 22.

[0051] I. The control system controls the left and right template bearings 4 to contact the concave arc surfaces of the left and right end molds respectively, controls the moving workpiece platform 10 to move left and right, and simultaneously controls the spindle cutters 5 on the left and right sides to process the workpiece blank 7 until the processing of the concave arc surfaces at the left and right ends is completed.

[0052] J. Proceed to step C until all workpieces have been processed.

[0053] For ease of description, the front-back, left-right, up-down directions of this utility model are only relative to... Figure 1 This does not constitute any limitation on the present invention.

[0054] This utility model is not limited to this embodiment. Any equivalent concept or modification within the technical scope disclosed in this utility model shall be included in the protection scope of this utility model.

Claims

1. A device for automatically processing the concave arc surfaces at both ends of a guitar bridge, characterized in that: The system includes a worktable, a storage unit, a feeding unit, an auxiliary positioning unit, a lateral movement unit, two processing units, a workpiece movement unit, and a control system. The storage unit is installed on the front side of the worktable, the feeding unit is installed on the worktable and located in front of the storage unit, the auxiliary positioning unit is installed on the worktable and located behind the storage unit, the lateral movement unit is installed in the middle of the worktable and spans across the worktable in the front-back direction, the two processing units are installed on the rear side of the worktable, and the workpiece movement unit is installed on the middle-rear side of the worktable and moves along the front-back and left-right directions of the worktable. The control system is connected to the feeding unit, the auxiliary positioning unit, the lateral movement unit, the two processing units, and the workpiece movement unit via control lines. The two processing units are a left processing unit and a right processing unit, which have the same structure and are symmetrical.

2. The device for automatically processing the concave arc surfaces at both ends of the guitar bridge surface according to claim 1, characterized in that: The storage unit includes a storage box body, a storage box movable stop bar, a storage box movable baffle (14), a storage box locking screw (15), and a storage box fixed baffle (16). The storage box body is fixedly installed on the workbench. The storage box movable stop bar is installed on the right side of the storage box body. The storage box fixed baffle (16) is installed on the left side of the storage box body. The storage box movable baffle (14) is installed on the left side of the storage box fixed baffle (16) through the storage box locking screw (15). The workpiece blank (7) is placed inside the storage box body. The left and right ends of the workpiece blank (7) are in contact with the storage box movable stop bar and the storage box fixed baffle (16) respectively. Openings are provided on the front and rear sides of the bottom of the box body. The height of the opening is greater than the thickness of one workpiece blank (7) and less than the sum of the thicknesses of two workpiece blanks (7). The length of the opening is greater than the length of one workpiece blank (7). The feeding unit includes a feeding bracket, a feeding movable plate (20), a feeding cylinder (21), a feeding lower tongue (18), a feeding upper tongue (19), a workpiece transfer table (8), and an auxiliary positioning cylinder (9). The feeding bracket is fixedly installed on the worktable. The feeding movable plate (20) is slidably connected to the feeding bracket and moves back and forth along the feeding bracket. The fixed end of the feeding cylinder (21) is fixed on the feeding bracket, and the moving end is connected to the feeding movable plate (20). The front end of the feeding lower tongue (18) is installed on the rear side of the feeding movable plate (20) through a pressure spring. The front end of the feeding upper tongue (19) is installed on the rear side of the feeding movable plate (20) through a pressure spring and is located above the feeding lower tongue (18). The auxiliary positioning unit includes a workpiece transfer table (8) and an auxiliary positioning cylinder (9). The workpiece transfer table (8) is fixedly installed on the workbench in front of the storage box. A horizontal positioning stop (13) is set on the left side of the workpiece transfer table (8) and a vertical positioning stop (12) is set on the rear side. The auxiliary positioning cylinder (9) is installed on the workbench to the right of the workpiece transfer table (8). The transverse movement unit includes a transverse support, a transverse cylinder (24), a transverse movement support (26), a vertical cylinder (30), a vacuum generator (29), a transverse track (25), a finished workpiece suction cup (27), and a workpiece blank suction cup (28); the transverse support is a gantry support that spans across the worktable in the front-back direction; the transverse movement support (26) is slidably connected to the transverse track (25) and moves back and forth along the transverse track (25); the transverse track (25) is fixed on the crossbeam of the transverse support; the fixed end of the transverse cylinder (24) is fixed on the transverse support and moves... The vertical cylinder (30) and the vacuum generator (29) are both installed inside the horizontal moving bracket (26). The fixed end of the vertical cylinder (30) is fixed on the horizontal moving bracket (26), and the moving end is connected to the vertical moving bracket. The lower front side of the vertical moving bracket is connected to the workpiece blank suction cup (28), and the lower rear side is connected to the workpiece finished suction cup (27). The vacuum generator (29) is connected to the workpiece blank suction cup (28) and the workpiece finished suction cup (27) through pipelines. The workpiece blank suction cup (28) is a pressure suction cup. The right-side machining unit includes a movable shaft (3), a movable base (1), a spindle motor (2), a template bearing (4), a spindle cutter (5), and a spindle base tension cylinder (23). The spindle motor (2) is fixedly mounted on the movable base (1), and the right side of the movable base (1) is mounted on the worktable via the movable shaft (3). The template bearing (4) and the spindle cutter (5) are mounted on the output shaft of the spindle motor (2). The fixed end of the spindle base tension cylinder (23) is installed inside the worktable below the movable base (1), and the moving end is connected to the left side of the movable base (1). The workpiece moving unit includes an X-axis moving motor, a Y-axis moving motor, a moving workpiece platform (10), a Y-axis track, a workpiece adsorption table (11), an X-axis track (6), and a contouring mold (22); the Y-axis track is fixed on the worktable in the left-right direction, the moving workpiece platform (10) is slidably connected to the Y-axis track and moves in the left-right direction along the Y-axis track; the moving workpiece platform (10) is connected to the Y-axis moving motor, and the Y-axis moving motor is mounted on the worktable; the X-axis track (6) is fixed on the moving workpiece platform (10) in the front-back direction. The workpiece adsorption platform (11) is slidably connected to the X-axis track (6) and moves along the X-axis track (6) in the front-back direction; the workpiece adsorption platform (11) is connected to the X-axis moving motor, and the X-axis moving motor is installed on the moving workpiece platform (10); the contour mold (22) is fixedly installed in the mold mounting slot on the moving workpiece platform (10), and the workpiece adsorption platform (11) is used to adsorb the workpiece blank (7); the contour mold (22) includes a left end mold and a right end mold, and the left end mold and the right end mold have the same structure and size and are symmetrical in shape.

3. The device for automatically processing the concave arc surfaces at both ends of the guitar bridge surface according to claim 2, characterized in that: The upper surface of the left mold has the same dimensions as the upper surface of the left end of the workpiece; two positioning cylinders are provided on the lower side of the left mold, and the two positioning cylinders are respectively connected to two positioning holes in the mold mounting slot on the moving workpiece platform (10).

4. The device for automatically processing the concave arc surfaces at both ends of the guitar bridge surface according to claim 2, characterized in that: The workpiece adsorption stage (11) is connected to the vacuum generator via a pipeline.

5. The device for automatically processing the concave arc surfaces at both ends of the guitar bridge surface according to claim 2, characterized in that: The workbench is provided with a finished workpiece slide (31) on the rear side, and a receiving box (17) is provided below the finished workpiece slide (31).

6. The device for automatically processing the concave arc surfaces at both ends of the guitar bridge surface according to claim 2, characterized in that: The diameter of the template bearing (4) is the same as the diameter of the cutting tool.

7. The device for automatically processing the concave arc surfaces at both ends of the guitar bridge surface according to claim 2, characterized in that: The lower feeding tongue (18), the upper feeding tongue (19), and the pressure spring constitute the feeding tongue assembly. There are two sets of the feeding tongue assembly, which are installed along the left and right direction on the right side of the feeding movable plate (20).

8. The device for automatically processing the concave arc surfaces at both ends of the guitar bridge surface according to claim 2, characterized in that: The moving workpiece platform (10) is connected to the Y-axis moving motor via a lead screw and nut structure; the workpiece adsorption table (11) is connected to the X-axis moving motor via a lead screw and nut structure.

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