Six jaw film chuck

Abstract

The utility model discloses a six claw film chuck relates to machining fixture technical field. This six claw film chuck, including disc base, synchronous drive mechanism and six groups of detachable chuck jaw, disc base contains positioning flange, chuck base and elastic film disc, and synchronous drive mechanism has push -pull sleeve, push -pull rod and connecting piece, and the chuck jaw is by wedge, base jaw, sub claw constitutes, and the elastic film disc is equipped with rectangular helical spring, positioning block and the like components for assisting chuck jaw clamping work piece. This six claw film chuck can avoid workpiece deformation, and is suitable for precision parts, thin -walled part clamping, and daily inspection screw and elastic component can guarantee stability, and has clamping precision and convenience of changing jaw.

Description

Technical Field

[0001] This utility model relates to the field of machining fixture technology, and in particular to a six-jaw thin-film chuck. Background Technology

[0002] With the development of the machining industry, precision and automation are important development trends. The gear industry, which has a wide range of applications, also faces this trend, and high-precision, high-efficiency automated machining is the goal of gear companies' transformation and upgrading. The key to achieving this goal lies in the fixture, which needs to be flexible in clamping, stable, and cost-effective.

[0003] Existing three-jaw or four-jaw chucks are prone to elliptical deformation when clamping thin-walled annular parts, affecting coaxiality; traditional diaphragm chucks, while able to evenly distribute clamping force, have a limited number of jaws and a small adjustable range, making them difficult to adapt to workpieces of various sizes; hydraulic or pneumatic six-jaw chucks are complex in structure, expensive, and occupy a large amount of machine tool space. Based on these considerations, we designed a six-jaw diaphragm chuck to address these problems. Utility Model Content

[0004] The purpose of this invention is to provide a six-jaw thin-film chuck to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a six-jaw thin-film chuck, comprising a disc-shaped base, wherein a synchronous drive mechanism is provided at one end of the disc-shaped base, and a plurality of detachable jaws are provided at the end of the synchronous drive mechanism away from the disc-shaped base; The synchronous drive mechanism includes a push-pull sleeve, a push-pull rod is installed on the inner wall of the push-pull sleeve, and a connector is fixedly connected to the end of the push-pull rod away from the push-pull sleeve; When the piston rod of the hydraulic cylinder passes through the disc base and pushes the push-pull rod to move radially, the connecting part will push the jaw to make axial displacement under the action of the push-pull rod. Then, the hydraulic cylinder will drive the jaw to retract radially to achieve centering and clamping of the workpiece.

[0006] Preferably, the disc base includes a positioning flange, one end of which is fixedly connected to a chuck base, and the end of the chuck base away from the positioning flange is fixedly connected to an elastic diaphragm disc, the outer wall of which has six radial grooves along the circumference.

[0007] Preferably, an adjusting shim is movably connected to the outer wall of the push-pull rod, a sliding groove is provided between the elastic diaphragm disc and the chuck base, the adjusting shim is slidably connected in the sliding groove, the push-pull sleeve passes through the chuck base and extends to both ends, the push-pull rod passes through the elastic diaphragm disc and extends to the right, and multiple hydraulic and pneumatic O-rings are fixedly connected inside the push-pull sleeve and the push-pull rod.

[0008] Preferably, a positioning groove is provided below the chuck base, a support column is fixedly connected to the inner wall of the positioning groove, a positioning rod is slidably connected to the inner wall of the support column, and the positioning rod is inserted into the connector and fixed by an internal hexagonal cone end screw.

[0009] Preferably, the chuck includes a wedge block hinged in a radial groove. One end of the wedge block is fixedly connected to a base chuck, and the end of the base chuck away from the wedge block is fixedly connected to a sub-chuck by an internal hexagonal head screw. The end of the sub-chuck away from the base chuck is fixedly connected to a calibration component.

[0010] Preferably, the surface of the elastic film disc has a groove, a rectangular helical spring is fixedly connected inside the groove, a tip is fixedly connected to the end of the rectangular helical spring away from the groove, and the tip is fixedly connected to the base claw.

[0011] Preferably, a positioning block is installed between the elastic film disc and the base claw, and the positioning block is fixedly connected to the base claw by an internal hexagonal head screw.

[0012] The technical effects and advantages of this utility model are as follows: 1. The core technical advantage of this six-jaw diaphragm chuck lies in its outstanding uniformity of clamping force. Through a synchronous drive mechanism, the push-pull rod drives the six sets of jaws to move synchronously. Combined with the elastic deformation compensation of the elastic diaphragm disc and the uniform preload of the rectangular helical spring, plus the multi-point contact of the six jaws to distribute the force, it avoids the problems of uneven force on a single jaw and workpiece deformation in traditional chucks from the aspects of structural synchronization, elastic compensation and multi-point contact. It can not only meet the needs of precision clamping, but also stably clamp thin-walled parts and other easily deformable workpieces.

[0013] 2. The sub-claw of this utility model is easy to disassemble, replace and install. The sub-claw is connected to the base claw by an internal hexagonal head screw, which makes disassembly simple. The base claw is positioned by both the center point and the positioning block. After changing the claw, there is no need to recalibrate the centering accuracy. At the same time, the core structure such as the base claw can be reused. Only the sub-claw needs to be replaced to adapt to workpieces of multiple specifications, reducing procurement and changeover costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; In the diagram: 1. Disc-shaped base; 11. Positioning flange; 12. Chuck base; 13. Elastic diaphragm disc; 14. Radial groove; 15. Support column; 16. Positioning rod; 2. Synchronous drive mechanism; 21. Push-pull sleeve; 22. Push-pull rod; 23. Connector; 24. Adjusting shim; 25. O-ring for hydraulic and pneumatic applications; 3. Chuck; 31. Wedge; 32. Base chuck; 33. Sub-chuck; 34. Calibration piece; 35. Rectangular helical spring; 36. Center; 37. Positioning block. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] This utility model provides, for example Figure 1 The six-jaw diaphragm chuck shown includes a disc-shaped base 1. A synchronous drive mechanism 2 is provided at one end of the disc-shaped base 1. Multiple detachable jaws 3 are provided at the end of the synchronous drive mechanism 2 away from the disc-shaped base 1. The synchronous drive mechanism 2 includes a push-pull sleeve 21. A push-pull rod 22 is installed on the inner wall of the push-pull sleeve 21. An adjusting shim 24 is movably connected to the outer wall of the push-pull rod 22. A connector 23 is fixedly connected to the end of the push-pull rod 22 away from the push-pull sleeve 21. Multiple hydraulic and pneumatic O-rings 25 are fixedly connected inside the push-pull sleeve 21 and the push-pull rod 22. When the piston rod of the hydraulic cylinder passes through the disc-shaped base and pushes the push-pull rod 22 to move radially, the connector 23 will push the jaws 3 to make axial displacement under the action of the push-pull rod 22. Then, the hydraulic cylinder drives the jaws 3 to retract radially to achieve centering and clamping of the workpiece.

[0017] As a technical optimization of this utility model, the disc base includes a positioning flange 11. A chuck base 12 is fixedly connected to one end of the positioning flange 11, and an elastic diaphragm disc 13 is fixedly connected to the end of the chuck base 12 away from the positioning flange 11. A sliding groove is formed between the elastic diaphragm disc 13 and the chuck base 12. An adjusting shim 24 is slidably connected in the sliding groove. A push-pull sleeve 21 passes through the chuck base 12 and extends to both ends. A push-pull rod 22 passes through the elastic diaphragm disc 13 and extends to the right. Six radial grooves 14 are formed along the circumference of the outer wall of the elastic diaphragm disc 13. A positioning groove is formed below the chuck base 12. A support column 15 is fixedly connected to the inner wall of the positioning groove. A positioning rod 16 is slidably connected to the inner wall of the support column 15. The positioning rod 16 is inserted into the connector 23 and fixed by a hexagonal cone screw. This structure avoids the problems of uneven force on a single jaw and workpiece deformation in traditional chucks. It can not only meet the requirements of precision clamping, but also stably clamp thin-walled parts and other easily deformable workpieces.

[0018] As a technical optimization of this utility model, the jaw 3 includes a wedge block 31, which is hinged in the radial groove 14. One end of the wedge block 31 is fixedly connected to a base jaw 32. The end of the base jaw 32 away from the wedge block 31 is fixedly connected to a sub-jaw 33 by an internal hexagonal head screw. The end of the sub-jaw 33 away from the base jaw 32 is fixedly connected to a calibration component 34. A groove is formed on the surface of the elastic diaphragm disk 13. A rectangular helical spring 35 is fixedly connected inside the groove. The end of the rectangular helical spring 35 away from the groove is fixedly connected to a tip 36. The tip 36 is fixedly connected to the base jaw 32. A positioning block 37 is installed between the elastic diaphragm disk 13 and the base jaw 32. The positioning block 37 is fixedly connected to the base jaw 32 by an internal hexagonal head screw. This structure makes it easy to disassemble the sub-jaw 33. At the same time, due to the dual positioning of the tip 36 and the positioning block 37, the core structure such as the base jaw 32 can be reused. Only the sub-jaw 33 needs to be replaced to adapt to workpieces of various specifications, reducing procurement and changeover costs.

[0019] In use, the positioning flange 11 of the disc-shaped base 1 is fixed to the machine tool spindle or worktable, and the hydraulic cylinder piston rod and push-pull rod 22 are connected. Then, the hydraulic cylinder is started to push the push-pull rod 22, which drives the wedge blocks 31 of the six sets of jaws 3 to move synchronously axially along the radial groove 14 of the elastic diaphragm disc 13 through the connecting piece 23 until the sub-jaw 33 calibration piece 34 approaches the workpiece. Continue to drive to make the jaws 3 synchronously retract radially. The deformation of the elastic diaphragm disc 13 cooperates with the rectangular helical spring 35 to provide a uniform pre-tightening force to clamp the workpiece. When disassembling and assembling the sub-jaw 33, the screw can be loosened with an Allen wrench to remove the sub-jaw 33. When installing the adapter sub-jaw 33, it fits against the base jaw 32 and is pre-fixed by aligning with the screw holes. Since the base jaw 32 has been positioned by the spring, the center 36 and the positioning block 37, there is no need to recalibrate, just tighten the screw.

[0020] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A six-jaw thin-film chuck, comprising a disc-shaped base (1), characterized in that, The disc-shaped base (1) is provided with a synchronous drive mechanism (2) at one end, and the synchronous drive mechanism (2) is provided with multiple detachable claws (3) at the end away from the disc-shaped base (1). The synchronous drive mechanism (2) includes a push-pull sleeve (21), and a push-pull rod (22) is installed on the inner wall of the push-pull sleeve (21). A connector (23) is fixedly connected to one end of the push-pull rod (22) away from the push-pull sleeve (21). When the piston rod of the hydraulic cylinder passes through the disc base and pushes the push-pull rod (22) to move radially, the connecting piece (23) will push the jaw (3) to make axial displacement under the action of the push-pull rod (22), and then the hydraulic cylinder will drive the jaw (3) to retract radially to achieve centering and clamping of the workpiece.

2. The six-jaw thin-film chuck according to claim 1, characterized in that, The disc base includes a positioning flange (11), one end of which is fixedly connected to a chuck base (12), and the other end of the chuck base (12) away from the positioning flange (11) is fixedly connected to an elastic diaphragm disc (13). The outer wall of the elastic diaphragm disc (13) has six radial grooves (14) along the circumference.

3. The six-jaw thin-film chuck according to claim 2, characterized in that, The outer wall of the push-pull rod (22) is movably connected to an adjusting shim (24). A sliding groove is provided between the elastic diaphragm disc (13) and the chuck base (12). The adjusting shim (24) is slidably connected in the sliding groove. The push-pull sleeve (21) passes through the chuck base (12) and extends to both ends. The push-pull rod (22) passes through the elastic diaphragm disc (13) and extends to the right. Multiple hydraulic and pneumatic O-ring seals (25) are fixedly connected inside the push-pull sleeve (21) and the push-pull rod (22).

4. The six-jaw thin-film chuck according to claim 2, characterized in that, A positioning groove is provided below the chuck base (12), and a support column (15) is fixedly connected to the inner wall of the positioning groove. A positioning rod (16) is slidably connected to the inner wall of the support column (15). The positioning rod (16) is inserted into the connector (23) and fixed by an internal hexagonal cone end screw.

5. The six-jaw thin-film chuck according to claim 2, characterized in that, The chuck (3) includes a wedge (31), which is hinged in a radial groove (14). One end of the wedge (31) is fixedly connected to a base chuck (32). The end of the base chuck (32) away from the wedge (31) is fixedly connected to a sub-chuck (33) by an internal hexagonal head screw. The end of the sub-chuck (33) away from the base chuck (32) is fixedly connected to a calibration piece (34).

6. A six-jaw thin-film chuck according to claim 5, characterized in that, The elastic film disc (13) has a groove on its surface. A rectangular helical spring (35) is fixedly connected inside the groove. A tip (36) is fixedly connected to the end of the rectangular helical spring (35) away from the groove. The tip (36) is fixedly connected to the base claw (32).

7. The six-jaw thin-film chuck according to claim 5, characterized in that, A positioning block (37) is installed between the elastic film disc (13) and the base claw (32), and the positioning block (37) is fixedly connected to the base claw (32) by an internal hexagonal head screw.

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