A workpiece angle adjustment device for a vertical machining center

Abstract

The present invention discloses a workpiece angle adjustment device for a vertical machining center, and relates to the technical field of fixtures for vertical machining centers. The present invention 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, a rotating sleeve is rotatably installed on the bottom of the bearing platform, three groups of mounting ring grooves are provided on the outside of the rotating sleeve, and a collar is rotatably installed inside the three groups of mounting ring grooves, two groups of arc guide rails are fixedly installed on the outside of the collar, the two groups of arc guide rails are distributed in an annular shape, a clamping support rod is slidably connected inside the arc guide rail, and a chuck is provided on the top of the clamping support rod. The present invention controls the annular groove on the lifting lock sleeve to be misaligned with the top rod, and the rotating sleeve and the collar 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. The workpiece only needs to be placed on the top of the bearing platform, and the clamping is completed adaptively, which is convenient for clamping.

Description

Technical Field

[0001] This invention relates to the field of vertical machining center fixture technology, and more specifically to a workpiece angle adjustment device for a vertical machining center. Background Art

[0002] A vertical machining center is a machining center whose spindle axis is set perpendicular to the worktable. It is mainly suitable for machining complex parts such as plates, discs, molds, and small shells. Vertical machining centers can perform milling, boring, drilling, tapping, and thread cutting operations. When machining with 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 rotating the fixture itself, but this method results in poor circumferential stability of the fixture, especially in a vertical machining center. 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 this invention is to solve the above-mentioned problems by providing 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:

[0006] A workpiece angle adjustment device for a vertical machining center comprises a base, a bearing platform is fixedly mounted on the top of the base, six groups of linear slides are provided inside the bearing platform, and the six groups of linear slides are symmetrically distributed in a ring shape, a rotating sleeve is rotatably mounted on the bottom of the bearing platform, three groups of mounting ring grooves are provided on the outside of the rotating sleeve, and collars are rotatably mounted inside the three groups of mounting ring grooves, two groups of arc guide rails are fixedly mounted on the outside of the collars, and the two groups of arc guide rails are distributed in a ring shape, a clamping support rod is slidably connected to the inside of the arc guide rail, the clamping support rod passes through the linear slide, and a chuck is provided on the top of the clamping support rod;

[0007] A sliding cavity is provided inside the rotating sleeve, and the sliding cavity is designed to correspond to the mounting ring groove. A contact switch is fixedly installed inside the sliding cavity. A shift block is slidably connected to the inside of the sliding cavity, and 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, and the push rod passes through the inside of the rotating sleeve. An inner shift groove is provided in an annular manner on the inner wall of the collar, and the shift block can be inserted into the inner shift groove. The cross sections of the shift block and the inner shift groove are both triangular.

[0008] 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.

[0009] 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.

[0010] Furthermore, the chuck and the inner chuck are both semicircular.

[0011] Furthermore, a toothed clip is provided on the outer side of the inner clamp.

[0012] Furthermore, the clamping support rod is a threaded rod, the outer side of the threaded rod is threadedly connected to multiple sets of limiting nuts, and the arc guide rail and the bearing platform are located between adjacent limiting nuts.

[0013] 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 provided on the outside of the rotating sleeve, and the transmission wheel is meshed with the external gear teeth.

[0014] 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.

[0015] 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.

[0016] Furthermore, an angle scale is provided on the top of the supporting platform.

[0017] Furthermore, mounting holes are provided on all four sides of the base.

[0018] The beneficial effects of the present invention are as follows:

[0019] 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 rail to rotate, and the arc guide rail drives the clamping support rod to slide along the linear slide groove. 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, it can clamp workpieces of different shapes and can clamp the workpiece 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 tilted along the edge of the workpiece, and the clamping stability is high.

[0020] 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 need to place the workpiece on the top of the carrier table to adaptively complete the clamping, which is convenient to clamp. Attached Figure Description

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 This is an exploded view of the overall structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the cross-sectional structure of the rotating sleeve and the arc-shaped guide rail of the present invention;

[0024] Figure 4 This is an exploded view of the rotating sleeve and arc-shaped guide rail of the present invention;

[0025] Figure 5 It is a cross-sectional schematic diagram of the rotary sleeve of the present invention;

[0026] Figure 6 This is a schematic diagram of the collar and arc-shaped guide rail of the present invention;

[0027] Figure 7 This is a schematic diagram of the clamping support rod and the clamp of the present invention;

[0028] Figure 8 This is a schematic diagram of the circular workpiece clamping method of the present invention;

[0029] Figure 9 This is a schematic diagram of a rectangular workpiece clamping according to the present invention;

[0030] Figure 10 It is a schematic diagram of workpiece angle adjustment of the present invention.

[0031] Reference numerals: 1. Base; 11. Outer support column; 12. Inner support column; 13. Torque motor; 14. Worm gear; 15. Worm wheel; 16. Transmission wheel; 17. Lifting cylinder; 2. Bearing platform; 21. Linear slide groove; 3. Rotary sleeve; 31. Mounting ring groove; 32. Slide cavity; 33. Contact switch; 34. Outer gear tooth; 35. Toggle block; 36. Contact piece; 37. Top spring; 38. Top rod; 4. Collar; 41. Inner toggle groove; 42. Mounting claw; 5. Arc-shaped guide rail; 6. Clamping support rod; 7. Chuck; 71. Inner chuck; 72. Slider; 73. Support spring; 8. Lifting lock sleeve; 81. Annular groove. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0033] Example 1, as Figures 1-10 As shown, a workpiece angle adjustment device for a vertical machining center includes a base 1. A support platform 2 is fixedly installed on the top of the base 1. The support platform 2 has six sets of linear slide grooves 21 inside, which are symmetrically distributed in a ring. A rotating sleeve 3 is rotatably installed on the bottom of the support platform 2. Three sets of mounting ring grooves 31 are opened on the outer side of the rotating sleeve 3. A collar 4 is rotatably installed inside the three sets of mounting ring grooves 31. Two sets of arc-shaped guide rails 5 are fixedly installed on the outer side of the collar 4, which are distributed in a ring. A clamping support rod 6 is slidably connected inside the arc-shaped guide rail 5. The clamping support rod 6 passes through the linear slide groove 21, and a chuck 7 is provided on the top of the clamping support rod 6.

[0034] The inside of the rotating sleeve 3 is provided with a sliding cavity 32, which is designed to correspond to the mounting ring groove 31. A contact switch 33 is fixedly installed inside the sliding cavity 32. A lever 35 is slidably connected inside the sliding cavity 32. A contact piece 36 is provided on the outside of the lever 35. A top spring 37 is provided between the lever 35 and the inner wall of the sliding cavity 32. A top rod 38 is provided on the side of the lever 35 near the inside of the rotating sleeve 3. The top rod 38 penetrates into the inside of the rotating sleeve 3. An inner groove 41 is provided on the inner wall of the collar 4. The lever 35 can be inserted into the inner groove 41. The cross-section of the lever 35 and the inner groove 41 are both triangular.

[0035] A lifting cylinder 17 is fixedly installed on the top of the base 1. A lifting lock sleeve 8 is fixedly installed on the top of the telescopic end of the lifting cylinder 17. Three sets of annular grooves 81 are opened on the outer side of the lifting lock sleeve 8.

[0036] In use, the base 1 is installed on the machining table of the vertical machining center, and then the workpiece is placed on the support table 2. At this time, the push rod 38 corresponds to the annular groove 81. Start the equipment, and the rotating sleeve 3 rotates. In this embodiment, the driving source of the rotating sleeve 3 is not limited and can be directly driven by a motor or other rotary drive methods. The rotating sleeve 3 drives the three sets of collars 4 to rotate through the push block 35 and the inner push groove 41. The three sets of collars 4 drive the six sets of arc-shaped guide rails 5 to rotate synchronously. The arc-shaped guide rails 5 drive the clamping support rod 6 to slide along the straight slide groove 21. The clamping support rod 6 moves towards the workpiece. The clamping support rod 6 drives the chuck 7 to approach the workpiece. When the workpiece is circular, multiple sets of chucks 7 contact the workpiece at the same time and clamp the workpiece in the middle of the support table 2. After the clamping and positioning are completed, the three sets of collars 7 rotate. Ring 4 cannot rotate, rotating sleeve 3 rotates relative to the three sets of rings 4, rotating sleeve 3 drives the lever 35 to rotate relative to the ring 4, inner lever groove 41 pushes lever 35 to slide into slide cavity 32, lever 35 squeezes top spring 37, lever 35 drives top rod 38 to move into annular groove 81, lever 35 drives contact piece 36 to press on contact switch 33, three sets of contact switches 33 are triggered at the same time, external controller receives feedback and controls lifting cylinder 17 to run, lifting cylinder 17 drives lifting lock sleeve 8 to rise, lifting lock sleeve 8 drives annular groove 81 to misalign with top rod 38, lifting lock sleeve 8 presses lever 35 tightly into inner lever groove 41 through top rod 38, at this time the ring 4 and rotating sleeve 3 are locked together, by giving rotating sleeve 3 a certain torque, the clamping force on the workpiece can be controlled;

[0037] When clamping a rectangular workpiece, the worker needs to hold the workpiece. When the two sets of chucks 7 on the same ring 4 are in contact with the workpiece at the same time, the two sets of clamping support rods 6 cannot continue to close due to the workpiece's constraint. Both ends of the workpiece are clamped by one set of clamping points. At this time, the workpiece placement angle can be adjusted according to the requirements. The ring 4 cannot continue to rotate. At this time, the rotating sleeve 3 drives the lever 35 to rotate relative to the ring 4. The inner lever groove 41 pushes the lever 35 to slide into the sliding cavity 32. The lever 35 squeezes the top spring 37. The lever 35 drives the top rod 38 to move into the annular groove 81. The lever 35 drives the contact piece 36. When the contact switch 33 is pressed, the rotating sleeve 3 continues to drive the other collars 4 to rotate. When all six sets of chucks 7 are in contact with the workpiece, the rotating sleeve 3 rotates relative to the three sets of collars 4. The three sets of contact switches 33 are triggered at the same time. The external controller receives feedback and controls the lifting cylinder 17 to run. The lifting cylinder 17 drives the lifting locking sleeve 8 to rise. The lifting locking sleeve 8 drives the annular groove 81 to be misaligned with the top rod 38. The lifting locking sleeve 8 presses the lever 35 tightly into the inner lever groove 41 through the top rod 38. At this time, the collar 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.

[0038] This device first positions and clamps the workpiece, and then applies pressure clamping, resulting in high clamping stability. When clamping a round workpiece, it uses a six-point circumferential clamping method, and when clamping a rectangular workpiece, it uses a six-point double-linear clamping method. It can also clamp workpieces at any angle, making it widely applicable. Furthermore, the clamped workpiece exhibits high circumferential stability, making vertical machining more stable.

[0039] Furthermore, the top of the support platform 2 is provided with an angle scale to facilitate adjustment of the workpiece angle.

[0040] Furthermore, mounting holes are provided around the base 1, which facilitates the installation of the base 1 on the machining table of the vertical machining center.

[0041] In embodiment two, based on the above embodiment, it further includes a chuck 7 rotatably mounted on the top of the clamping support rod 6, a torsion spring provided at the rotation center of the chuck 7, an inner rotating groove provided inside the chuck 7, an inner chuck 71 rotatably mounted inside the inner rotating groove, an arc groove provided on the inner wall of the inner rotating groove, a slider 72 provided on the outer side of the inner chuck 71, the slider 72 slidably connected in the arc groove, and a support spring 73 provided between the slider 72 and the inner wall of the arc groove.

[0042] With this design, the chuck 7 and inner chuck 71 can adapt to the shape of the workpiece, better fit the workpiece surface, and clamp more stably. At the same time, when adjusting the angle of a rectangular workpiece, since the chuck 7 can rotate, the posture of the rectangular workpiece can be adjusted more easily, making clamping more convenient.

[0043] Furthermore, both the collet 7 and the inner collet 71 are semi-circular.

[0044] Furthermore, the outer side of the inner chuck 71 is provided with toothed clips for more stable clamping.

[0045] In embodiment three, based on the above embodiments, the clamping support rod 6 is a threaded rod, and the outer side of the threaded rod is connected to multiple sets of limiting nuts. The arc-shaped guide rail 5 and the bearing platform 2 are located between adjacent limiting nuts.

[0046] When assembling the device, first thread a limiting nut onto the clamping support rod 6, then pass the clamping support rod 6 through the linear slide groove 21, and then screw on two limiting nuts. Next, let the clamping support rod 6 pass through the arc-shaped guide rail 5, and finally screw on one limiting nut. The two upper limiting nuts clamp the bearing platform 2 in the middle, and the two lower limiting nuts clamp the arc-shaped guide rail 5 in the middle, thus completing the installation of the clamping support rod 6. The installation is convenient, and the clamping support rod 6 can slide stably along the arc-shaped guide rail 5 and the linear slide groove 21. Through the setting of this embodiment, the clamping support rod 6 can also be fixed on the bearing platform 2 by tightening the limiting nuts, and the device can be clamped and locked. When processing large workpieces, the clamping stability can be further improved by secondary locking.

[0047] Embodiment 4, based on the above embodiment, 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 gear 15 is rotatably installed on the top of the base 1, a transmission wheel 16 is fixedly installed on the top of the worm gear 15, the worm 14 is meshed with the worm gear 15, and an outer gear tooth 34 is provided on the outer side of the rotating sleeve 3, and the transmission wheel 16 is meshed with the outer gear tooth 34.

[0048] This embodiment is a driving structure of the rotating sleeve 3. By controlling the power supply of the torque motor 13, 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 prevents the worm wheel 15 from driving the worm 14 to rotate. Therefore, after the torque motor 13 is powered off, the device clamping is stable.

[0049] 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.

[0050] Embodiment 6, based on the above embodiment, further includes that the top of the base 1 is fixedly installed with an outer pillar 11 and an inner pillar 12, the supporting 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 supporting platform 2 to facilitate assembly of the device.

[0051] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily 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 is not limited to the embodiments shown herein but is intended to conform 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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