Positioning and clamping device for turntable machining

Abstract

The utility model relates to a turntable processing, positioning and clamping device, which comprises a base, a plurality of clamping units arranged on the base and a driving unit in driving connection with the clamping units, each clamping unit comprises a clamping base, a clamping block, an elastic component and a pressure sensor arranged on the clamping block, the clamping base comprises a supporting part and a sliding part, the clamping block is movably attached to the surface of the supporting part and connected with the clamping base through the elastic component, the base is provided with a sliding groove corresponding to the sliding part, and the sliding part is arranged in the sliding groove and connected with the driving unit. The positioning and clamping device solves the problem that the positioning and clamping device clamps excessively or loosely in the machining process of the rotary table, and improves the yield of machining of the rotary table.

Description

Technical Field

[0001] The utility model relates to the field of positioning and clamping devices, in particular to a positioning and clamping device for turntable processing. Background Art

[0002] The turntable of a record player is a thin-walled metal disc, which needs to be fixed by a positioning and clamping device during numerical control processing. In order not to affect the processing such as surface grinding and punching of the turntable, a positioning and clamping device is usually used to clamp and fix the turntable from around the thin-walled ring bulge at the bottom of the turntable. However, due to the inability to control the clamping force of the existing clamping and positioning device, or due to reasons such as inconsistent turntable materials, thicknesses, and abnormal personnel debugging, it is easy to cause the turntable to deform due to excessive clamping, or the clamping is too loose, affecting the processing accuracy, resulting in a reduction in the yield rate of turntable processing. Content of the Utility Model

[0003] Aiming at the above existing problems, the purpose of the utility model is to provide a positioning and clamping device for turntable processing, to solve the problems of excessive clamping or loose clamping of the positioning and clamping device during turntable processing, and to improve the yield rate of turntable processing.

[0004] The purpose of the utility model is achieved by the following technical solutions:

[0005] Provide a positioning and clamping device for turntable processing, including a base, a plurality of clamping units arranged on the base, and a driving unit drivingly connected to the clamping units. The clamping unit includes a clamping base, a clamping block, an elastic member, and a pressure sensor arranged on the clamping block. The clamping base includes a supporting portion and a sliding portion. The clamping block is movably attached to the surface of the supporting portion and is connected to the clamping base through the elastic member. The base is provided with a chute corresponding to the sliding portion, and the sliding portion is placed in the chute and connected to the driving unit.

[0006] The designed positioning and clamping device in this solution includes a plurality of clamping units, which are driven by the driving unit to simultaneously close and approach to clamp the raised thin wall at the bottom of the turntable. The clamping unit includes a clamping base, a clamping block, an elastic member, and a pressure sensor arranged on the clamping block. The clamping block is connected to the clamping base through the elastic member, converting the rigid clamping force into a gradually changing clamping force, reducing the possibility of the turntable deforming due to excessive clamping; at the same time, the pressure sensor on the clamping block is electrically connected to an external controller. When the pressure sensor detects that the pressure reaches the preset range value, the detected pressure signal is sent to the external controller, and the external controller controls the driving unit to stop driving, and the clamping unit stops approaching. Through this design, different clamping forces are preset for different turntables, which is not only convenient for staff to debug, but also accurately controlled, solving the problems of excessive clamping or loose clamping of the positioning and clamping device during turntable processing, and improving the yield rate of turntable processing.

[0007] Furthermore, the plurality of clamping units are distributed in a circular array with the center of the base as the center.

[0008] The clamping units are distributed in a circular array. When the turntable is placed on the positioning clamping device, the clamping units can better fit the turntable. The clamping units push the raised thin walls at the bottom of the turntable synchronously from multiple directions, which can more stably position and clamp the turntable.

[0009] Furthermore, the clamping block includes an end surface for fitting with the turntable, and the end surface is arc-shaped.

[0010] The end surface of the clamping block that fits with the raised thin wall at the bottom of the turntable is arc-shaped, and the arc-shaped end surfaces of multiple clamping blocks are cocircular and can fit tightly with the raised thin wall at the bottom of the turntable. After clamping, it can effectively prevent the turntable from shaking during processing and avoid processing errors.

[0011] Furthermore, the base is provided with support units, the support units are distributed in a circular array with the center of the base as the center, and the support units are arranged alternately with the clamping units.

[0012] A supporting unit is also provided between two adjacent clamping units, and cooperates with the supporting part of the clamping unit to jointly support the turntable, so that the turntable can remain stable when subjected to downward pressure at different positions during processing.

[0013] Furthermore, the support unit includes a support arm and a support rod, one end of the support arm is fixed on the base, and the support rod is arranged at the other end of the support arm.

[0014] The support unit consists of a support arm and a support rod. The support arm extends outward. The support rod is fixed at the end of the support arm so that the support rod supports the edge of the turntable and is staggered with the support point of the support part, so that the turntable can be better maintained stable.

[0015] Furthermore, the support arm is provided with a through hole, the support rod is a screw rod, and the support rod passes through the through hole and is fixed on the support arm.

[0016] The support rod adopts a screw rod, and a through hole is opened at the end of the support arm. After the support rod passes through the through hole, a nut is used to lock the support rod to fix the support rod on the support arm. The screw rod can be used to conveniently adjust the support height, and it has better compatibility for turntables of different specifications.

[0017] Furthermore, a cavity is provided at the center of the base, and the driving unit is placed in the cavity.

[0018] A cavity is opened on the base, and the drive unit is placed inside the cavity, which effectively utilizes the space and reduces the occupied area of ​​the base; the cavity is then covered by a cover to prevent processing debris from falling into the cavity and prevent safety hazards.

[0019] Further, the driving unit includes a driving member, a driving gear connected to the driving member and located at the center of the cavity, a plurality of driven gears meshing with the driving gear, and a lead screw connected to the driven gears.

[0020] The driving unit adopts a gear transmission method. Both the driving gear and the driven gears are bevel gears. The driven gears are connected to the clamping base through lead screws. By driving the driving gear to rotate through the driving member, and then driving a plurality of lead screws to rotate synchronously through the driven gears, the approach and separation of the clamping bases are synchronously controlled, and the driving process is stable and reliable.

[0021] Further, it further includes a bearing support seat, and the lead screw passes through the bearing support seat and is connected to the sliding part.

[0022] A bearing support seat is arranged in the cavity to support the lead screw, so that the lead screw rotates more smoothly.

[0023] Further, the sliding part is provided with a threaded hole matching the lead screw, and the sliding part is connected to the lead screw through the threaded hole.

[0024] The connection method between the sliding part and the lead screw is a threaded transmission. When the lead screw rotates forward, the clamping units approach each other. When the lead screw rotates in reverse, the clamping units move away from each other. The driving process is stable, and the pressure applied by the clamping units can be increased slowly, which is beneficial for the pressure sensor to sense and control the driving unit.

[0025] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0026] The positioning and clamping device designed in this solution includes a plurality of clamping units. The clamping units are driven by the driving unit to simultaneously close and approach to clamp the convex thin wall at the bottom of the turntable. Each clamping unit includes a clamping base, a clamping block, an elastic member, and a pressure sensor arranged on the clamping block. The clamping block is connected to the clamping base through the elastic member, converting the rigid clamping force into a gradually changing clamping force, reducing the possibility of deformation of the turntable caused by excessive clamping. At the same time, the pressure sensor on the clamping block is electrically connected to an external controller. When the pressure sensor detects that the pressure reaches the preset range value, the detected pressure signal is sent to the external controller, and the external controller controls the driving unit to stop driving and the clamping units to stop approaching. Through this design, different clamping forces are preset for different turntables, which is not only convenient for the staff to debug, but also has precise control, solves the problems of excessive clamping or loose clamping of the positioning and clamping device during the processing of the turntable, and improves the yield rate of the turntable processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the positioning and clamping device clamping the turntable in an embodiment of the present utility model.

[0028] Figure 2 This is a structural diagram of the positioning and clamping device according to an embodiment of the present utility model.

[0029] Illustration: 1. Base; 2. Clamping unit; 3. Driving unit; 4. Supporting unit; 11. Chute; 12. Cavity; 21. Clamping base; 22. Clamping block; 23. Pressure sensor; 24. Elastic member; 31. Driving gear; 32. Driven gear; 33. Bearing support seat; 34. Lead screw; 41. Support arm; 42. Support rod; 211. Support portion; 212. Sliding portion; 213. Threaded hole. Detailed implementation manners

[0030] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present utility model are shown in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein.

[0031] As Figure 1 and Figure 2 shown, a rotary table machining positioning and clamping device is provided, which includes a base 1, a plurality of clamping units 2 provided on the base 1, and a driving unit 3 drivingly connected to the clamping units 2. The clamping unit 2 includes a clamping base 21, a clamping block 22, an elastic member 24, and a pressure sensor 23 provided on the clamping block 22. The clamping base 21 includes a support portion 211 and a sliding portion 212. The clamping block 22 is movably attached to the surface of the support portion 211 and is connected to the clamping base 21 through the elastic member 24. The base 1 is provided with a chute 11 corresponding to the sliding portion 212. The sliding portion 212 is placed in the chute 11 and is connected to the driving unit 3.

[0032] The positioning and clamping device designed in this solution includes multiple clamping units 2, which are driven by a driving unit 3 to simultaneously close and approach each other to clamp the convex thin wall at the bottom of the turntable. The clamping unit 2 includes a clamping base 21, a clamping block 22, an elastic component 24, and a pressure sensor 23 provided on the clamping block 22. The clamping block 22 is connected to the clamping base 21 through the elastic component 24. The elastic component 24 can be a spring, and the number of springs can be set according to actual needs. In this embodiment, the number of springs is set to 2. The rigid clamping force is converted into a gradually changing clamping force through the elastic component 24, reducing the possibility of the turntable being deformed due to excessive clamping. At the same time, the pressure sensor 23 on the clamping block 22 is electrically connected to an external controller. When the pressure sensor 23 detects that the pressure reaches the preset range value, the detected pressure signal is sent to the external controller, and the external controller controls the driving unit 3 to stop driving, and the clamping unit 2 stops approaching. Through this design, different clamping forces can be preset for different turntables, which is not only convenient for the staff to debug, but also has precise control, solves the problems of excessive clamping or loose clamping of the positioning and clamping device during the processing of the turntable, and improves the yield rate of the turntable processing.

[0033] As Figure 2 shown, multiple clamping units 2 are arranged in a circular array with the center of the base 1 as the center of the circle. When the turntable is placed on the positioning and clamping device, the clamping unit 2 can better fit the turntable; the clamping unit 2 synchronously pushes the convex thin wall at the bottom of the turntable from multiple directions, and can more firmly position and clamp the turntable. The clamping block 22 includes an end face for fitting with the turntable. The end face is arc-shaped, and the arc-shaped end faces of multiple clamping blocks 22 are co-circular, which can fit tightly with the convex thin wall at the bottom of the turntable, and can effectively prevent the turntable from shaking during the processing after clamping, avoiding processing errors.

[0034] As Figure 2As shown, the base 1 is also provided with a support unit 4, which is distributed in a circular array with the center of the base 1 as the center, and the support unit 4 is staggered with the clamping unit 2. The support unit 4 includes a support arm 41 and a support rod 42, one end of the support arm 41 is fixed on the base 1, and the other end of the support arm 41 is provided with a through hole, and the support rod 42 is a screw, and the support rod 42 passes through the through hole and is fixed on the support arm 41. The support unit 4 is arranged between two adjacent clamping units 2, and cooperates with the support part 211 of the clamping unit 2 to jointly support the turntable, so that the turntable can remain stable when subjected to downward pressure from different positions during processing. The support unit 4 is composed of a support arm 41 and a support rod 42, and the support rod 42 is fixed at the end of the support arm 41, and the support arm 41 extends outward, so that the support rod 42 supports the edge of the turntable, which is staggered from the support point of the support part 211, so that the turntable can be better kept stable. The support rod 42 adopts a screw rod, and a through hole is opened at the end of the support arm 41. After the support rod 42 passes through the through hole, a nut is used to lock the support rod 42 to fix the support rod 42 on the support arm 41. The use of the screw rod can facilitate the adjustment of the support height, and it has better compatibility for turntables of different specifications.

[0035] like Figure 2 As shown, a cavity 12 is provided at the center of the base 1, and a driving unit 3 is placed in the cavity 12. The driving unit 3 includes a driving member (not shown in the figure), a driving gear 31 connected to the driving member and located at the center of the cavity 12, a plurality of driven gears 32 meshing with the driving gear 31, a screw 34 connected to the driven gear 32, and a bearing support seat 33. The driving member can be made of existing technology, such as a servo motor. The screw 34 passes through the bearing support seat 33 and is connected to the sliding part 212. The sliding part 212 is provided with a threaded hole 213 matching the screw 34, and the sliding part 212 is connected to the screw 34 through the threaded hole 213.

[0036] A cavity 12 is formed on the base 1, and the driving unit 3 is placed inside the cavity 12, effectively utilizing the space and reducing the occupied area of the base. Then, the cavity 12 is covered by a covering member to prevent machining debris from falling into the cavity and prevent potential safety hazards. The driving unit 3 adopts a gear transmission method. The driving member can be a servo motor. Both the driving gear 31 and the driven gear 32 are bevel gears. The driven gear 32 is connected to the clamping base 21 through a lead screw 34. By driving the driving gear 31 to rotate with the driving member, the driven gear 32 then drives multiple lead screws 34 to rotate synchronously, thereby synchronously controlling the clamping base 21 to move closer and away from each other. The driving process is stable and reliable. A bearing support 33 is provided in the cavity 12 to support the lead screw 34, making the rotation of the lead screw 34 more stable. A threaded connection is adopted between the sliding part 212 and the lead screw 34. When the lead screw 34 rotates forward, the clamping units 2 move closer to each other. When the lead screw 34 rotates in reverse, the clamping units 2 move away from each other. The driving process is stable, and the pressure applied by the clamping units 2 can increase slowly, which is beneficial for the pressure sensor 23 to sense and control the driving unit.

[0037] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0038] In addition, terms such as "first", "second", etc. are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0039] Although embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A turntable processing positioning clamping device, characterized in that: It includes a base, a plurality of clamping units arranged on the base, and a driving unit connected to the clamping units. The clamping unit includes a clamping base, a clamping block, an elastic component, and a pressure sensor arranged on the clamping block. The clamping base includes a supporting portion and a sliding portion. The clamping block is movably attached to the surface of the supporting portion and is connected to the clamping base through the elastic component. The base is provided with a sliding groove corresponding to the sliding portion. The sliding portion is placed in the sliding groove and connected to the driving unit.

2. The turntable processing positioning clamping device according to claim 1, characterized in that: The plurality of clamping units are distributed in a circular array with the center of the base as the center.

3. The turntable processing positioning clamping device according to claim 1, characterized in that: The clamping block comprises an end surface for fitting with the rotating disk, and the end surface is arc-shaped.

4. The turntable processing positioning clamping device according to claim 1, characterized in that: The base is also provided with support units, which are distributed in a circular array with the center of the base as the center of the circle, and the support units are arranged alternately with the clamping units.

5. The turntable processing positioning clamping device according to claim 4, characterized in that: The support unit comprises a support arm and a support rod, one end of the support arm is fixed on the base, and the support rod is arranged at the other end of the support arm.

6. The turntable processing positioning clamping device according to claim 5, characterized in that: The support arm is provided with a through hole, and the support rod is a screw rod, and the support rod passes through the through hole and is fixed on the support arm.

7. The turntable machining positioning clamping device according to claim 1, characterized in that: A cavity is provided at the center of the base, and the driving unit is placed in the cavity.

8. The turntable machining positioning clamping device according to claim 7, characterized in that: The driving unit includes a driving member, a driving gear connected to the driving member and located at the center of the cavity, a plurality of driven gears meshing with the driving gear, and a screw connected to the driven gears.

9. The turntable machining positioning clamping device according to claim 8, characterized in that: It also includes a bearing support seat, and the screw rod passes through the bearing support seat and is connected with the sliding part.

10. The turntable machining positioning clamping device according to claim 9, characterized in that: The sliding part is provided with a threaded hole matching the screw rod, and the sliding part is connected to the screw rod through the threaded hole.

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