Workpiece angle adjusting device for vertical machining center

Abstract

The invention discloses a workpiece angle adjusting device for a vertical machining center, and relates to the technical field of vertical machining center clamps. The device comprises a base, a bearing table is fixedly mounted at the top of the base, six linear sliding grooves are formed in the bearing table, a rotating sleeve is rotatably mounted at the bottom of the bearing table, three mounting ring grooves are formed in the outer side of the rotating sleeve, and lantern rings are rotatably mounted in the three mounting ring grooves; and two sets of arc-shaped guide rails are fixedly installed on the outer side of the lantern ring, the two sets of arc-shaped guide rails are annularly distributed, clamping supporting rods are slidably connected to the interiors of the arc-shaped guide rails, and chucks are arranged at the tops of the clamping supporting rods. The clamping force can be adjusted by controlling the annular groove in the lifting lock sleeve to be staggered with the ejector rod and controlling the rotating sleeve to be locked with the lantern ring, so that the clamping shape adjustment and the clamping force adjustment can be automatically completed, a workpiece only needs to be placed on the top of the bearing table, clamping is completed in a self-adaptive mode, and clamping is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of vertical machining center fixtures, and in particular to a workpiece angle adjustment device for a vertical machining center. Background Art

[0002] A vertical machining center is a machining center in which the spindle axis is set perpendicular to the worktable. It is mainly suitable for machining complex parts such as plates, discs, molds and small shells. A vertical machining center can complete milling, boring, drilling, tapping and cutting threads. When machining in a vertical machining center, the workpiece needs to be fixed and clamped on the fixture of the machining table.

[0003] Existing fixtures for vertical machining centers are usually three-jaw chucks and bench vises. Three-jaw chucks are mainly used to fix cylindrical workpieces, and bench vises are mainly used to clamp rectangular workpieces. Existing fixtures are not suitable for clamping various workpieces, and since the jaw angle is fixed, the clamping angle cannot be adjusted. The workpiece clamping angle is fixed and the processing range is limited. In the document (application number: CN202310725939.3), a vertical machining center fixture is disclosed. Although the fixture can clamp multiple workpieces at a time, the workpiece clamping angle is also fixed. Some angles are achieved by allowing the fixture itself to rotate, but this method results in poor circumferential stability of the fixture, especially in a vertical machining center, where the vertically rotating tool exerts a certain circumferential force on the workpiece, which easily affects the stability of the fixture. Summary of the invention

[0004] The purpose of the present invention is to solve the above-mentioned problem and provide a workpiece angle adjustment device for a vertical machining center.

[0005] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions: A workpiece angle adjustment device for a vertical machining center comprises a base, a bearing platform is fixedly installed on the top of the base, six groups of linear slide grooves are provided inside the bearing platform, and the six groups of linear slide grooves are symmetrically distributed in a ring shape, a rotating sleeve is rotatably installed at the bottom of the bearing platform, three groups of mounting ring grooves are provided on the outer side of the rotating sleeve, and sleeve rings are rotatably installed inside the three groups of mounting ring grooves, two groups of arc guide rails are fixedly installed on the outer side of the sleeve ring, and the two groups of arc guide rails are distributed in a ring shape, a clamping support rod is slidably connected inside the arc guide rail, and the clamping support rod passes through the linear slide groove, and a chuck is provided on the top of the clamping support rod; A sliding cavity is provided inside the rotating sleeve, and the sliding cavity is designed correspondingly to the mounting ring groove. A contact switch is fixedly installed inside the sliding cavity. A shift block is slidably connected inside the sliding cavity. A contact piece is provided on the outside of the shift block. A top spring is provided between the shift block and the inner wall of the sliding cavity. A push rod is provided on the side of the shift block close to the inside of the rotating sleeve. The push rod penetrates into the inside of the rotating sleeve. An inner groove is provided in an annular manner on the inner wall of the sleeve ring. The shift block can be plugged into the inner groove. The cross sections of the shift block and the inner groove are both triangular. A lifting cylinder is fixedly installed on the top of the base, a lifting lock sleeve is fixedly installed on the top of the telescopic end of the lifting cylinder, and three groups of annular grooves are annularly opened on the outer side of the lifting lock sleeve.

[0006] Furthermore, the chuck is rotatably installed on the top of the clamping support rod, a torsion spring is provided at the rotation center of the chuck, an inner rotation groove is provided inside the chuck, an inner chuck is rotatably installed inside the inner rotation groove, an arc groove is provided on the inner wall of the inner rotation groove, a slider is provided on the outer side of the inner chuck, the slider is slidably connected in the arc groove, and a support spring is provided between the slider and the inner wall of the arc groove.

[0007] Furthermore, the clamping head and the inner clamping head are both semicircular.

[0008] Furthermore, a toothed clamping piece is arranged on the outer side of the inner clamping head.

[0009] Furthermore, the clamping support rod is a threaded rod, the outer side of the threaded rod is threadedly connected to multiple sets of limit nuts, and the arc guide rail and the bearing platform are located between adjacent limit nuts.

[0010] Furthermore, a torque motor is fixedly installed on the top of the base, a worm is fixedly installed on the output end of the torque motor, a worm wheel is rotatably installed on the top of the base, a transmission wheel is fixedly installed on the top of the worm wheel, the worm is meshed with the worm wheel, and external gear teeth are arranged on the outside of the rotating sleeve, and the transmission wheel is meshed with the external gear teeth.

[0011] Furthermore, a mounting claw is provided on the outer side of the collar, and the arc-shaped guide rail is fixedly mounted on the mounting claw by bolts.

[0012] Furthermore, an outer support and an inner support are fixedly mounted on the top of the base, the bearing platform is fixedly mounted on the outer support, and the inner support passes through the lifting lock sleeve and is fixedly connected to the bearing platform.

[0013] Furthermore, an angle scale is provided on the top of the supporting platform.

[0014] Furthermore, mounting holes are provided around the base.

[0015] The beneficial effects of the present invention are as follows: 1. The present invention controls the rotation of the rotating sleeve, and the rotating sleeve drives three groups of rings to rotate simultaneously. The rings drive the arc guide rails to rotate, and the arc guide rails drive the clamping support rods to slide along the linear slide grooves. When the clamping support rod drives the chuck to stick to the workpiece, the group of rings can rotate relative to the rotating sleeve, and the rotating sleeve continues to drive other rings to rotate. Therefore, workpieces of different shapes can be clamped, and the workpieces can be clamped at any angle. When clamping a circular workpiece, the clamping points are distributed in a ring on the outer surface of the workpiece. When clamping a rectangular workpiece, the clamping points are distributed in a straight line on the outer surface of the workpiece. When the angle of the rectangular workpiece is changed, the clamping points are inclined along the edge of the workpiece, and the clamping stability is high.

[0016] 2. The present invention controls the annular groove on the lifting lock sleeve to correspond to the push rod. At this time, the rotating sleeve drives the ring to rotate through the elastic force of the top spring, so that the ring can rotate relative to the rotating sleeve when subjected to the limiting force. The annular groove on the lifting lock sleeve is controlled to be misaligned with the push rod, and the rotating sleeve and the ring are locked. At this time, the clamping force can be adjusted, so the clamping shape adjustment and the clamping force adjustment can be automatically completed. Only by placing the workpiece on the top of the carrier table, the clamping can be adaptively completed, and the clamping is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is an exploded view of the overall structure of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the rotating sleeve and the arc guide rail of the present invention; Figure 4 It is an exploded view of the rotating sleeve and the arc guide rail of the present invention; Figure 5 It is a cross-sectional schematic diagram of the rotating sleeve of the present invention; Figure 6 It is a schematic diagram of the collar and the arc guide rail of the present invention; Figure 7 It is a schematic diagram of the clamping support rod and the clamping head of the present invention; Figure 8 It is a schematic diagram of the circular workpiece clamping of the present invention; Fig. 9 It is a schematic diagram of the rectangular workpiece clamping of the present invention; Fig.10 It is a schematic diagram of workpiece angle adjustment of the present invention.

[0018] 1. Base; 11. Outer support; 12. Inner support; 13. Torque motor; 14. Worm; 15. Worm wheel; 16. Transmission wheel; 17. Lifting cylinder; 2. Carrying platform; 21. Linear slide; 3. Rotating sleeve; 31. Mounting ring groove; 32. Sliding cavity; 33. Contact switch; 34. Outer gear; 35. Shift block; 36. Contact piece; 37. Top spring; 38. Push rod; 4. Ring; 41. Inner shift groove; 42. Mounting claw; 5. Arc guide rail; 6. Clamping support rod; 7. Chuck; 71. Inner chuck; 72. Sliding block; 73. Support spring; 8. Lifting lock sleeve; 81. Annular groove. DETAILED DESCRIPTION

[0019] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] Embodiment 1, as Figure 1-Figure 10 As shown, a workpiece angle adjustment device for a vertical machining center includes a base 1, a bearing platform 2 is fixedly installed on the top of the base 1, six groups of linear slide grooves 21 are opened inside the bearing platform 2, and the six groups of linear slide grooves 21 are symmetrically distributed in a ring shape, a rotating sleeve 3 is rotatably installed at the bottom of the bearing platform 2, three groups of mounting ring grooves 31 are opened on the outer side of the rotating sleeve 3, and a collar 4 is rotatably installed inside the three groups of mounting ring grooves 31, two groups of arc guide rails 5 are fixedly installed on the outer side of the collar 4, and the two groups of arc guide rails 5 are distributed in a ring shape, and a clamping support rod 6 is slidably connected inside the arc guide rail 5, and the clamping support rod 6 passes through the linear slide groove 21, and a chuck 7 is arranged on the top of the clamping support rod 6; A sliding cavity 32 is provided inside the rotating sleeve 3. The sliding cavity 32 is designed to correspond to the mounting ring groove 31. A contact switch 33 is fixedly installed inside the sliding cavity 32. A shift block 35 is slidably connected inside the sliding cavity 32. A contact piece 36 is provided on the outside of the shift block 35. A top spring 37 is provided between the shift block 35 and the inner wall of the sliding cavity 32. A push rod 38 is provided on the side of the shift block 35 close to the inside of the rotating sleeve 3. The push rod 38 penetrates into the inside of the rotating sleeve 3. An inner groove 41 is provided in an annular manner on the inner wall of the collar 4. The shift block 35 can be plugged into the inner groove 41. The cross sections of the shift block 35 and the inner groove 41 are both triangular. A lifting cylinder 17 is fixedly installed on the top of the base 1 , and a lifting lock sleeve 8 is fixedly installed on the top of the telescopic end of the lifting cylinder 17 . The outer side of the lifting lock sleeve 8 is annularly provided with three groups of annular grooves 81 .

[0021] When in use, the base 1 is installed on the processing table of the vertical machining center, and then the workpiece is placed on the bearing platform 2. At this time, the top rod 38 corresponds to the annular groove 81, the equipment is started, and the rotating sleeve 3 rotates. In this embodiment, the driving source of the rotating sleeve 3 is not limited, and a motor drive or other rotation drive method can be directly used. The rotating sleeve 3 drives the three groups of rings 4 to rotate through the shift block 35 and the inner shift groove 41, and the three groups of rings 4 drive the six groups of arc guide rails 5 to rotate synchronously. The arc guide rails 5 drive the clamping support rod 6 to slide along the linear slide groove 21, and the clamping support rod 6 moves toward the workpiece. The clamping support rod 6 drives the chuck 7 to approach the workpiece. When the workpiece clamped is a circular workpiece, multiple groups of chucks 7 contact with the workpiece at the same time and clamp the workpiece in the middle of the bearing platform 2. After the clamping and positioning are completed, the three sets of sleeves The ring 4 cannot rotate, and the rotating sleeve 3 rotates relative to the three groups of rings 4. The rotating sleeve 3 drives the shift block 35 to rotate relative to the ring 4. The inner shift groove 41 pushes the shift block 35 to slide into the sliding cavity 32. The shift block 35 squeezes the top spring 37. The shift block 35 drives the top rod 38 to move into the annular groove 81. The shift block 35 drives the contact piece 36 to press on the contact switch 33. The three groups of contact switches 33 are triggered at the same time. The external controller receives feedback and controls the operation of the lifting cylinder 17. The lifting cylinder 17 drives the lifting lock sleeve 8 to rise. The lifting lock sleeve 8 drives the annular groove 81 to be misaligned with the top rod 38. The lifting lock sleeve 8 presses the shift block 35 tightly into the inner shift groove 41 through the top rod 38. At this time, the ring 4 and the rotating sleeve 3 are locked together. By giving the rotating sleeve 3 a certain torque, the clamping force on the workpiece can be controlled. When clamping a rectangular workpiece, a worker needs to hold the rectangular workpiece. When the two corresponding groups of chucks 7 on the same collar 4 are in contact with the workpiece at the same time, under the restriction of the workpiece, the two groups of clamping support rods 6 cannot continue to be close together, and the clamping points at both ends of the workpiece are one group. At this time, the workpiece placement angle can be adjusted according to needs. The collar 4 cannot continue to rotate. At this time, the rotating sleeve 3 drives the shift block 35 to rotate relative to the collar 4, and the inner shift groove 41 pushes the shift block 35 to slide into the sliding cavity 32. The shift block 35 squeezes the top spring 37, and the shift block 35 drives the top rod 38 to move into the annular groove 81. The shift block 35 drives the contact piece 36 The contact switch 33 is pressed, and the rotating sleeve 3 continues to drive the other rings 4 to rotate. When the six groups of chucks 7 are in contact with the workpiece, the rotating sleeve 3 rotates relative to the three groups of rings 4, and the three groups of contact switches 33 are triggered at the same time. The external controller receives feedback and controls the operation of the lifting cylinder 17. The lifting cylinder 17 drives the lifting lock sleeve 8 to rise, and the lifting lock sleeve 8 drives the annular groove 81 to be misaligned with the push rod 38. The lifting lock sleeve 8 presses the shift block 35 tightly into the inner shift groove 41 through the push rod 38. At this time, the ring 4 and the rotating sleeve 3 are locked together. By giving the rotating sleeve 3 a certain torque, the clamping force on the workpiece can be controlled. This device first positions and clamps the workpiece, and then performs pressure clamping. It has high clamping stability. When clamping a round workpiece, it uses six-point circular clamping, and when clamping a rectangular workpiece, it uses six-point double linear clamping. It can clamp workpieces at any angle, has a wide range of applications, and the workpiece has high circumferential stability after clamping, making vertical processing more stable.

[0022] Furthermore, an angle scale is provided on the top of the support platform 2 to facilitate adjustment of the workpiece angle.

[0023] Furthermore, mounting holes are provided around the base 1, and the arrangement of the mounting holes facilitates the base 1 to be installed on a processing table of a vertical machining center.

[0024] Embodiment 2, based on the above embodiment, further includes: the chuck 7 is rotatably installed on the top of the clamping support rod 6, a torsion spring is provided at the rotation center of the chuck 7, an inner rotation groove is provided inside the chuck 7, an inner chuck 71 is rotatably installed inside the inner rotation groove, an arc groove is provided on the inner wall of the inner rotation groove, a slider 72 is provided on the outer side of the inner chuck 71, the slider 72 is slidably connected in the arc groove, and a support spring 73 is provided between the slider 72 and the inner wall of the arc groove.

[0025] Through this design, the chuck 7 and the inner chuck 71 can adapt to the shape of the workpiece, can better fit the surface of the workpiece, and clamp more stably. At the same time, when adjusting the angle of the rectangular workpiece, since the chuck 7 can rotate, the posture of the rectangular workpiece can be adjusted more easily, and the clamping is more convenient.

[0026] Furthermore, the clamping head 7 and the inner clamping head 71 are both semicircular.

[0027] Furthermore, a toothed clamping piece is provided on the outer side of the inner clamping head 71, so that the clamping is more stable.

[0028] Embodiment 3, based on the above embodiment, further includes that the clamping support rod 6 is a threaded rod, the outer side of the threaded rod is threadedly connected with multiple sets of limit nuts, and the arc guide rail 5 and the support platform 2 are located between adjacent limit nuts.

[0029] When assembling the device, first thread a limit nut on the clamping support rod 6, then pass the clamping support rod 6 through the linear slide groove 21, then screw on two limit nuts, then make the clamping support rod 6 pass through the arc guide rail 5, and finally screw on a limit nut. The upper two limit nuts clamp the bearing platform 2 in the middle, and the lower two limit nuts clamp the arc guide rail 5 in the middle, thereby completing the installation of the clamping support rod 6. The installation is convenient, and the clamping support rod 6 can stably slide along the arc guide rail 5 and the linear slide groove 21. Through the arrangement of this embodiment, the clamping support rod 6 can also be fixed on the bearing platform 2 by tightening the limit nuts, and the device can be clamped and locked. When processing large workpieces, the clamping stability can be further improved through secondary locking.

[0030] Embodiment 4, on the basis of the above embodiments, further includes: a torque motor 13 is fixedly installed on the top of the base 1, a worm 14 is fixedly installed on the output end of the torque motor 13, a worm wheel 15 is rotatably installed on the top of the base 1, a transmission wheel 16 is fixedly installed on the top of the worm wheel 15, the worm 14 is meshed with the worm wheel 15, and external gear teeth 34 are provided on the outer side of the rotating sleeve 3, and the transmission wheel 16 is meshed with the external gear teeth 34.

[0031] This embodiment is a driving structure of a rotating sleeve 3, which controls the torque motor 13 to be energized, the torque motor 13 drives the worm 14 to rotate, the worm 14 drives the worm wheel 15 to rotate, the worm wheel 15 drives the transmission wheel 16 to rotate, and the transmission wheel 16 drives the rotating sleeve 3 to rotate through the outer gear teeth 34. The setting of the torque motor 13 can more accurately control the clamping force, and the design of the worm gear structure makes the worm wheel 15 unable to drive the worm 14 to rotate, so after the torque motor 13 is powered off, the device is clamped stably.

[0032] Embodiment 5, based on the above embodiment, further includes that a mounting claw 42 is provided on the outer side of the collar 4, and the arc guide rail 5 is fixedly mounted on the mounting claw 42 by bolts, so as to facilitate subsequent replacement and maintenance.

[0033] Embodiment 6, based on the above embodiment, further includes that an outer pillar 11 and an inner pillar 12 are fixedly installed on the top of the base 1, the bearing platform 2 is fixedly installed on the outer pillar 11, and the inner pillar 12 passes through the lifting lock sleeve 8 and is fixedly connected to the bearing platform 2 to facilitate assembly of the device.

[0034] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A workpiece angle adjustment device for a vertical machining center, comprising a base (1), characterized in that: A bearing platform (2) is fixedly installed on the top of the base (1), six groups of linear slide grooves (21) are provided inside the bearing platform (2), and the six groups of linear slide grooves (21) are symmetrically distributed in a ring shape. A rotating sleeve (3) is rotatably installed on the bottom of the bearing platform (2), and three groups of mounting ring grooves (31) are provided on the outer side of the rotating sleeve (3). A sleeve ring (4) is rotatably installed inside the three groups of mounting ring grooves (31), and two groups of arc guide rails (5) are fixedly installed on the outer side of the sleeve ring (4), and the two groups of arc guide rails (5) are distributed in a ring shape. A clamping support rod (6) is slidably connected inside the arc guide rail (5), and the clamping support rod (6) passes through the linear slide groove (21), and a clamping head (7) is provided on the top of the clamping support rod (6); The rotating sleeve (3) has a sliding cavity (32) formed inside, and the sliding cavity (32) is designed to correspond to the mounting ring groove (31). A contact switch (33) is fixedly installed inside the sliding cavity (32). A shift block (35) is slidably connected inside the sliding cavity (32). A contact piece (36) is arranged on the outer side of the shift block (35). A top spring (37) is arranged between the shift block (35) and the inner wall of the sliding cavity (32). A push rod (38) is arranged on the side of the shift block (35) close to the inside of the rotating sleeve (3). The push rod (38) penetrates into the inside of the rotating sleeve (3). An inner groove (41) is formed in an annular manner on the inner wall of the ring (4). The shift block (35) can be plugged into the inner groove (41). The cross sections of the shift block (35) and the inner groove (41) are both triangular. A lifting cylinder (17) is fixedly mounted on the top of the base (1), a lifting lock sleeve (8) is fixedly mounted on the top of the telescopic end of the lifting cylinder (17), and three groups of annular grooves (81) are annularly formed on the outer side of the lifting lock sleeve (8).

2. The workpiece angle adjustment device for a vertical machining center according to claim 1, characterized in that: The chuck (7) is rotatably mounted on the top of the clamping support rod (6), a torsion spring is arranged at the rotation center of the chuck (7), an inner rotation groove is provided inside the chuck (7), an inner chuck (71) is rotatably mounted inside the inner rotation groove, an arc groove is provided on the inner wall of the inner rotation groove, a slider (72) is arranged on the outer side of the inner chuck (71), the slider (72) is slidably connected in the arc groove, and a support spring (73) is arranged between the slider (72) and the inner wall of the arc groove.

3. The workpiece angle adjustment device for a vertical machining center according to claim 2, characterized in that: The clamping head (7) and the inner clamping head (71) are both semicircular.

4. The workpiece angle adjustment device for a vertical machining center according to claim 3, characterized in that: A toothed clamping piece is provided on the outer side of the inner clamping head (71).

5. The workpiece angle adjustment device for a vertical machining center according to claim 4, characterized in that: The clamping support rod (6) is a threaded rod, the outer side of the threaded rod is threadedly connected to a plurality of sets of limit nuts, and the arc guide rail (5) and the bearing platform (2) are located between adjacent limit nuts.

6. The workpiece angle adjustment device for a vertical machining center according to claim 1, characterized in that: A torque motor (13) is fixedly mounted on the top of the base (1), a worm (14) is fixedly mounted on the output end of the torque motor (13), a worm wheel (15) is rotatably mounted on the top of the base (1), a transmission wheel (16) is fixedly mounted on the top of the worm wheel (15), the worm (14) meshes with the worm wheel (15), and external gear teeth (34) are arranged on the outer side of the rotating sleeve (3), and the transmission wheel (16) meshes with the external gear teeth (34).

7. The workpiece angle adjustment device for a vertical machining center according to claim 1, characterized in that: The outer side of the collar (4) is provided with a mounting claw (42), and the arc-shaped guide rail (5) is fixedly mounted on the mounting claw (42) by means of bolts.

8. The workpiece angle adjustment device for a vertical machining center according to claim 1, characterized in that: An outer support (11) and an inner support (12) are fixedly mounted on the top of the base (1); the bearing platform (2) is fixedly mounted on the outer support (11); and the inner support (12) passes through the lifting lock sleeve (8) and is fixedly connected to the bearing platform (2).

9. The workpiece angle adjustment device for a vertical machining center according to claim 1, characterized in that: An angle scale is provided on the top of the supporting platform (2).

10. The workpiece angle adjustment device for a vertical machining center according to claim 1, characterized in that: The base (1) is provided with mounting holes on all four sides.

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