Finish machining numerical control lathe clamp

Abstract

The utility model discloses a finish machining numerical control lathe clamp, and relates to the technical field of metal processing, the finish machining numerical control lathe clamp comprises a clamp connecting disc, a plurality of clamping jaw roots are uniformly distributed on the circumference of the clamp connecting disc, the clamping jaw roots are provided with clamping jaw teeth, and the sides, abutting against a workpiece, of the clamping jaw teeth are provided with stepped positioning bosses; a positioning key groove is formed in the clamping jaw root, and the clamping jaw teeth are provided with positioning rod pieces connected with the positioning key groove in an inserted mode. A positioning ring groove is formed in the end, inserted into the positioning key groove, of the positioning rod piece, and a plurality of clamping assemblies clamped and fixed to the positioning ring groove are arranged on the inner side wall of the positioning key groove. Through a clamping structure of the positioning ring groove and the elastic lantern ring, rigid connection between the positioning key groove and the positioning rod piece is achieved; the matching mode of the clamping jaw teeth and the clamping jaw roots is allowed to be dynamically adjusted, the clamping jaw can be conveniently switched between a supporting mode and a clamping mode, and the loss of workpiece machining efficiency caused by clamping jaw type replacement is effectively reduced.

Description

Technical Field

[0001] This application relates to the field of metal processing technology, and in particular to a precision machining CNC lathe fixture. Background Technology

[0002] CNC lathe fixtures are devices used to fix workpieces, ensuring machining accuracy and stability. Their main function is to hold complex-shaped workpieces. Lathe fixtures are divided into general-purpose fixtures and special-purpose fixtures. They use a CNC system to plan the workpiece's movement trajectory, improving production efficiency; they are widely used in machinery manufacturing, automotive parts, and other fields.

[0003] In existing CNC lathes, the lathe fixtures are equipped with jaws via a fixture connecting plate. The jaws are divided into clamping jaws for fixing solid workpieces and supporting jaws for fixing hollow workpieces. Different jaws are selected to fix the workpiece according to its structure.

[0004] Regarding the aforementioned technologies, the inventors believe that when a lathe fixture needs to change the type of chuck according to the workpiece structure, it is too cumbersome and inconvenient to change the type of chuck after first removing the fixture connecting plate from the lathe, which affects the processing efficiency of the workpiece. Utility Model Content

[0005] The purpose of this application is to provide a precision machining CNC lathe fixture to improve the efficiency of changing chucks when the fixture is inconvenient to clamp different types of workpieces.

[0006] The technical solution for a precision machining CNC lathe fixture provided in this application is as follows:

[0007] A precision machining CNC lathe fixture includes a fixture connecting plate, on which a plurality of jaw roots are evenly distributed around the circumference; a hollow groove is provided in the center of the fixture connecting plate, and a plurality of jaw grooves for sliding installation of the jaw roots are provided in the hollow groove; each jaw root includes jaw teeth and jaw roots, and a stepped positioning boss is provided on the side of the jaw teeth that abuts against the workpiece; a positioning keyway is provided on the jaw roots; a positioning rod is provided on the jaw teeth that inserts into the positioning keyway; a positioning ring groove is provided at one end of the positioning rod inserted into the positioning keyway, and a plurality of locking components that are locked into the positioning ring groove are provided on the inner sidewall of the positioning keyway.

[0008] By adopting the above technical solution, the multi-stage positioning structure with stepped positioning bosses can meet the clamping and support requirements of workpieces of various specifications. The positioning ring groove and the elastic collar are engaged to achieve a rigid connection between the positioning keyway and the positioning rod. By pulling out the positioning rod and changing the mating hole between the jaw teeth and the jaw root, the positioning rod can be inserted, allowing the jaw to switch between clamping mode and support mode, effectively improving the efficiency problem of changing jaws when it is inconvenient to clamp different types of workpieces.

[0009] Optionally, the inner wall of the positioning keyway is provided with a plurality of snap-fit ​​grooves; the snap-fit ​​assembly includes a snap-fit ​​post and an elastic element, one end of the snap-fit ​​post abuts against the inner wall of the positioning ring groove, the other end is connected to the elastic element, and the end of the elastic element away from the snap-fit ​​post is connected to the bottom of the snap-fit ​​groove.

[0010] By adopting the above technical solution, the elastic element at the bottom of the snap-fit ​​groove in the snap-fit ​​assembly is connected to the snap-fit ​​post, thereby limiting the fit between the positioning rod and the positioning keyway and increasing the stability of the jaws when fixing the workpiece.

[0011] Optionally, the positioning boss is provided with a corrugated groove.

[0012] By adopting the above technical solution and by creating corrugated grooves, the contact stress generated when the positioning boss abuts against the workpiece is reduced.

[0013] Optionally, the side of the claw teeth facing away from the corrugated groove is provided with an inclined surface to facilitate the engagement of the claw teeth when closed.

[0014] By adopting the above technical solution, the inclined planes enable the synchronous contraction of multiple sets of linked jaws during closure. Through the precise coupling between each inclined plane, the jaws generate a uniform radial contraction force during the closure process, enabling reliable clamping or support positioning of workpieces of more sizes.

[0015] Optionally, the positioning boss is provided with rounded edges at both ends of the corrugated groove to facilitate contact with the sidewall of the workpiece.

[0016] By adopting the above technical solution, the edge of the positioning boss is designed with rounded corners. By increasing the effective contact area between the jaw teeth and the workpiece, the contact stress between the jaws and the workpiece is reduced, thereby avoiding damage to the workpiece.

[0017] Optionally, a positioning slot is provided on the side of the claw root near the claw teeth for placing and installing the claw teeth, and the positioning keyway is provided in the positioning slot.

[0018] By adopting the above technical solution, the precise axial positioning of the claw teeth in the claw groove is achieved through the key-tenon joint structure of the positioning slot and the claw teeth. Through the joint design of the positioning rod and the positioning keyway, it is ensured that the claw teeth can still be stably installed in the claw groove after half a rotation.

[0019] Optionally, the positioning slot is provided with a magnetic element for attracting the claw teeth.

[0020] By adopting the above technical solution, magnetic components are set at both ends of the positioning slot, and axial pre-tightening connection between the claw teeth and the claw root is achieved through magnetic coupling, which effectively improves the structural stability of the claw under dynamic working conditions.

[0021] Optionally, a clamp mounting base is provided on the side of the clamp connecting plate away from the root of the jaws, and a number of fixing bolts connected to the clamp mounting base are provided through the side of the clamp connecting plate near the root of the jaws.

[0022] By adopting the above technical solution, and by setting fixing bolts and fixture mounting bases on the fixture connecting plate, the chuck teeth are prevented from coming out of the chuck root, and the lathe fixture is fixed on the fixture mounting base.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. By pulling out the positioning rod, changing the mating hole between the jaw teeth and the jaw root, and then inserting the positioning rod, the jaw can switch between clamping mode and support mode, effectively improving the efficiency problem of changing jaws when it is inconvenient to clamp different types of workpieces.

[0025] 2. The inclined plane is used to enable the synchronous contraction of multiple sets of linked jaws when closing. Through the precise coupling between the inclined plane and the mating surface, it is ensured that the jaws generate a uniform radial contraction force during the closing process, so as to achieve reliable clamping or support positioning for workpieces of more sizes.

[0026] 3. The edge of the positioning boss is designed with rounded corners. By increasing the effective contact area between the jaw teeth and the workpiece, the contact stress between the jaws and the workpiece is reduced, thereby avoiding damage to the workpiece. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a fixture structure for a precision machining CNC lathe.

[0028] Figure 2 This is a schematic diagram of the chuck structure.

[0029] Figure 3 This is a schematic diagram of the structure when the locating keyway and the locating rod are engaged.

[0030] In the diagram, 1. Fixture connecting plate; 11. Hollow groove; 12. Claw groove; 13. Fixing bolt; 131. Elastic plug; 2. Claw root; 21. Claw tooth; 211. Bevel; 212. Edge rounded corner; 213. Corrugated groove; 214. Positioning boss; 22. Snap-fit ​​assembly; 221. Positioning slot; 222. Magnetic component; 223. Snap-fit ​​post; 224. Snap-fit ​​groove; 225. Elastic component; 23. Positioning keyway; 231. Elastic collar; 24. Positioning rod; 241. Positioning ring groove; 3. Fixture mounting base. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1 -Appendix Figure 3 This application will be described in further detail below.

[0032] A precision machining CNC lathe fixture, with reference to Figure 1 The fixture includes a clamping connecting plate 1, which has a number of jaw roots 2 evenly distributed around its center. In this embodiment, the number of jaw roots 2 is preferably four. The clamping connecting plate 1 has a columnar structure. A clamping mounting seat 3 is provided on the side of the clamping connecting plate 1 away from the jaw roots 2. The clamping mounting seat 3 has a columnar structure. The clamping mounting seat 3 is coaxially connected to the center of the clamping connecting plate 1 around its center, so that the jaw roots 2 installed in the clamping connecting plate will not slide out due to the rotation of the lathe fixture.

[0033] Reference Figure 1 A plurality of fixing bolts 13 are threadedly connected to the fixture mounting base 3 on one side of the fixture connecting plate 1 near the jaw root 2. The fixing bolts 13 tightly fit and connect the fixture connecting plate 1 and the fixture mounting base 3 to ensure the stable operation of the lathe fixture. In this embodiment, the number of fixing bolts 13 is preferably four. Each of the fixing bolts 13 installed on the fixture connecting plate 1 is fitted with a snap-fit ​​component 22. The snap-fit ​​component 22 prevents the workpiece chips from splashing and contaminating the fixture connecting plate 1, ensuring the normal operation of the CNC lathe. In this embodiment, the elastic plug 131 is preferably made of rubber.

[0034] Reference Figure 1 A hollow groove 11 is provided at the center of the clamp connecting plate 1. The hollow groove 11 has a columnar structure. The clamp connecting plate 1 is provided with a number of claw grooves 12 that are close to the side wall of the claw root 2 for the claw root 2 to slide back and forth. In this embodiment, the number of claw grooves 12 is preferably four, and the claw grooves 12 have a long strip structure.

[0035] Reference Figure 1 and Figure 2 The side of the chuck tooth 21 that abuts against the workpiece is fixedly provided with a stepped positioning boss 214 by welding. Each step layer in the positioning boss 214 is designed to be equidistant. The stepped positioning boss 214 allows the fixture to select the appropriate step layer for matching and fixing according to the size of the pre-processed workpiece, ensuring the contact stress of the lathe fixture on the workpiece, and making the workpiece stable on the lathe fixture during processing.

[0036] Reference Figure 2 The positioning boss 214 is provided with a corrugated groove 213, which is a corrugated equidistant groove structure on the positioning boss 214. By opening the corrugated groove 213 on the positioning boss 214, the contact stress generated when the positioning boss 214 abuts against the workpiece is reduced, protecting the workpiece while making the workpiece more stably fixed on the lathe chuck.

[0037] Reference Figure 2The jaw root 2 is provided with jaw teeth 21; the side of the jaw teeth 21 that abuts against the workpiece is provided with a stepped positioning boss 214 by welding, and the side of the positioning boss 214 that abuts against the workpiece is provided with a corrugated groove 213 by milling.

[0038] Reference Figure 2 The side of the jaw teeth 21 facing away from the corrugated groove 213 is milled to provide an inclined surface 211 that facilitates the jaw teeth 21 to fit together when closed. In this embodiment, the inclination of the inclined surface 211 and the side of the jaw teeth 21 is a semi-right angle. The multiple sets of linked jaw teeth 21 are precisely coupled between each inclined surface 211 to ensure that the jaws generate a uniform radial contraction force during the closing process, so that the jaws can more stably and reliably clamp and position the workpiece. When the jaw teeth 21 are fully closed, each inclined surface 211 fits together, so that the jaw teeth 21 maintain precise center positioning in the closed state, making the workpiece processing more accurate.

[0039] Reference Figure 2 The positioning boss 214 is located at both ends of the corrugated groove 213 and is provided with edge rounded corners 212 to facilitate the contact between the claw root 2 and the side wall of the workpiece. The edge rounded corners 2 increase the contact area between the claw teeth 21 and the workpiece, reduce the contact stress, and protect the workpiece and the claw teeth 21.

[0040] Reference Figure 2 The positioning slot 221 is provided with a number of positioning keyways 23. In this embodiment, the number of positioning keyways 23 is preferably two, and the positioning keyways 23 are columnar structures. The positioning slot 221 is symmetrically distributed along the two end side walls and the positioning keyways 23 are provided at equal intervals.

[0041] Reference Figure 2 The side of the claw root 2 that abuts against the claw tooth 21 is provided with a positioning slot 221 for positioning and installing the claw tooth 21. The positioning slot 221 is provided with a magnetic element 222 for attracting the claw tooth 21. In this embodiment, the magnetic element 222 has a long strip shape and is preferably a magnet. The magnetic element 222 has a hole according to the position of the positioning keyway 23. The positioning rod 24 passes through the hole and is inserted into the positioning keyway 23.

[0042] Reference Figure 2 and Figure 3 The side of the claw tooth 21 away from the claw root 2 is provided with a positioning rod 24 connected to the positioning keyway 23 by welding. The positioning rod 24 has a columnar structure with a frustum top. One end of the positioning rod 24 inserted into the positioning keyway 23 is provided with a positioning ring groove 241. The inner sidewall of the positioning keyway 23 is provided with a number of locking grooves 224. In this embodiment, the number of locking grooves 224 is preferably four.

[0043] Reference Figure 3The inner wall of the positioning keyway 23 is provided with several locking components 22 that are locked to the positioning ring groove 241. The locking components 22 are located inside the locking groove 224. The locking components 22 include locking posts 223 and elastic members 225. One end of the locking post 223 abuts against the inner wall of the positioning ring groove 23, and the other end is connected to the elastic member 225 by welding. The end of the elastic member 225 away from the locking post 223 is connected to the bottom of the locking groove 224. The locking post 223 has a structure with a half-top. The sphere is cylindrical. In this embodiment, the number of snap-fit ​​components is preferably four, and the elastic element 225 is a spring. After the positioning rod 24 is inserted into the positioning keyway 23, the positioning ring groove 241 snaps into the snap-fit ​​post 223, making the fit between the positioning rod 24 and the positioning keyway 23 more stable. When the jaw teeth 21 adjust the fit with the workpiece by circumferential rotation, the positioning rod 24 and the positioning keyway 23 maintain a stable meshing fit, ensuring that the fixed jaw 2 always maintains a reliable clamping and support function.

[0044] The implementation principle of this application embodiment is as follows:

[0045] By disassembling the jaw root 2 and jaw teeth 21 with a mechanical wrench, the positioning rod 24 is separated from the positioning keyway 23. The installation position of the jaw teeth 21 on the jaw root 2 is adjusted, realizing the conversion between the clamping or supporting state between the jaw and the workpiece. This design makes the replacement of jaw type more convenient and effectively reduces the loss of workpiece processing efficiency caused by changing jaw type.

[0046] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A precision machining CNC lathe fixture, comprising a fixture connecting plate (1), wherein the fixture connecting plate (1) is provided with a plurality of jaw roots (2) evenly distributed around its circumference; characterized in that: The clamp connecting plate (1) has a hollow groove (11) in the center. The clamp connecting plate (1) is connected to the hollow groove (11) and has a plurality of jaw grooves (12) for sliding installation of jaw roots (2). The jaw roots (2) are provided with jaw teeth (21). The side of the jaw teeth (21) that abuts against the workpiece is provided with a stepped positioning boss (214). The jaw roots (2) are provided with a positioning keyway (23). The jaw teeth (21) are provided with a positioning rod (24) that is inserted into the positioning keyway (23). The end of the positioning rod (24) that is inserted into the positioning keyway (23) is provided with a positioning ring groove (241). The inner sidewall of the positioning keyway (23) is provided with a plurality of snap-fit ​​components (22) that are snapped into the positioning ring groove (241).

2. The precision machining CNC lathe fixture according to claim 1, characterized in that: The inner wall of the positioning keyway (23) is provided with a plurality of snap-fit ​​grooves (224); the snap-fit ​​assembly (22) includes a snap-fit ​​post (223) and an elastic element (225). One end of the snap-fit ​​post (223) abuts against the inner wall of the positioning ring groove (241), and the other end is connected to the elastic element (225). The end of the elastic element (225) away from the snap-fit ​​post (223) is connected to the bottom of the snap-fit ​​groove (224).

3. A precision machining CNC lathe fixture according to claim 1, characterized in that: The positioning boss (214) is provided with a corrugated groove (213).

4. A precision machining CNC lathe fixture according to claim 3, characterized in that: The side of the claw tooth (21) facing away from the corrugated groove (213) is provided with an inclined surface (211) to facilitate the claw tooth (21) to fit together when closed.

5. A precision machining CNC lathe fixture according to claim 3, characterized in that: The positioning boss (214) is provided with rounded edges (212) at both ends of the corrugated groove (213) to facilitate contact with the side wall of the workpiece.

6. A precision machining CNC lathe fixture according to claim 1, characterized in that: The claw root (2) is provided with a positioning slot (221) for placing and installing the claw teeth (21) on the side near the claw teeth (21), and the positioning keyway (23) is provided in the positioning slot (221).

7. A precision machining CNC lathe fixture according to claim 6, characterized in that: The positioning slot (221) is provided with a magnetic component (222) for attracting the claw teeth (21).

8. A precision machining CNC lathe fixture according to claim 1, characterized in that: A clamp mounting base (3) is provided on the side of the clamp connecting plate (1) away from the jaw root (2), and a number of fixing bolts (13) connected to the clamp mounting base (3) are provided through the side of the clamp connecting plate (1) near the jaw root (2).

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