CN220372747U

CN220372747U - Numerical control clamp for special-shaped materials

Info

Publication number: CN220372747U
Application number: CN202321804489.9U
Authority: CN
Inventors: 赖云
Original assignee: Chongqing Delongsheng Industrial Co ltd
Current assignee: Chongqing Delongsheng Industrial Co ltd
Priority date: 2023-07-11
Filing date: 2023-07-11
Publication date: 2024-01-23
Anticipated expiration: 2033-07-11

Abstract

The utility model relates to the technical field of numerical control clamps, in particular to a numerical control clamp for special-shaped materials. The utility model discloses a numerical control clamp for special-shaped materials, which comprises a clamping part, wherein the inside of the clamping part is a circular clamping hole; the clamping part is divided into a plurality of clamping claws which can be separated from each other, wave grooves are formed between the adjacent clamping claws, and the wave grooves extend to the clamping end surfaces of the clamping part. The utility model solves the technical problem of providing the numerical control clamp for the special-shaped material, which has strong universality and can not be eccentric.

Description

Numerical control clamp for special-shaped materials

Technical Field

The utility model relates to the technical field of numerical control clamps, in particular to a numerical control clamp for special-shaped materials.

Background

For machining multi-sided parts, such as six-sided nuts, it is necessary to reliably fix the hexagonal products, and for machining parts of various shapes, and also precise centering, otherwise the machined inner bore would have an eccentric problem. The existing product is reinforced, so that the polygonal product is reinforced, the fixture is usually adopted to cut grooves in angles according to the polygonal inner holes corresponding to the product design, the polygonal product can be installed in the polygonal inner holes in a matched mode, and then the groove cutting portions are reinforced, so that the polygonal product is fixed. However, in order to adapt to products, most of the numerical control clamps in China are cut grooves which are straight grooves at present. Thus, when clamping a hexagonal nut type product, the chamfer of the nut can be clamped in the straight groove due to eccentricity, so that the chamfer of the hexagonal nut is clamped. Meanwhile, the eccentricity of a clamped product is caused, centering adjustment is needed, efficiency is low, and the problem that the eccentricity occurs in subsequent hole machining is easy to cause. On the other hand, the existing clamp with the polygonal inner hole can only aim at products with specific shapes, cannot be used universally, and needs to replace a cutter frequently in production, thereby being time-consuming and labor-consuming.

Accordingly, those skilled in the art have been working to develop a numerical control fixture for profiled materials that is versatile and does not decenter.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the present utility model discloses a numerical control fixture for special-shaped materials, and aims to provide a numerical control fixture for special-shaped materials, which has strong versatility and is not eccentric.

In order to achieve the above purpose, the utility model provides a numerical control clamp for special-shaped materials, which comprises a clamping part, wherein the inside of the clamping part is a circular clamping hole; the clamping part is divided into a plurality of clamping claws which can be separated from each other, wave grooves are formed between the adjacent clamping claws, and the wave grooves extend to the clamping end faces of the clamping part.

Preferably, one end of the clamping part, which is far away from the clamping end face, is a connecting part, and an internal threaded hole is formed in the connecting part. The connecting part and the clamping part are manufactured in an integral mode, and an internal threaded hole of the connecting part is used for being in threaded fit locking with the spindle pull rod.

Preferably, the connecting part is provided with a straight groove communicated with the wave groove.

Preferably, a round hole communicated with the straight groove is formed in the tail end of the straight groove, and the diameter of the round hole is larger than the groove width of the straight groove. The grooved design of the wave grooves and the straight grooves are used for separating the clamping claws and then filling the products to be clamped. Through the design of straight flute and round hole, can reduce the stress concentration at fluting end, prevent the fluting end atress fracture of gripper. Meanwhile, the circular holes can better disperse stress.

Preferably, the groove width of the straight groove is equal to the groove width of the wave groove.

Preferably, the diameter of the internal threaded hole is larger than that of the clamping hole, the internal threaded hole and the clamping hole are excessively connected through a conical hole, and meanwhile, the spindle is installed and positioned.

Preferably, a groove in the clamp is arranged at one end, close to the connecting part, of the clamping part, and the diameter of the groove in the clamp is smaller than the outer diameter of the connecting part.

Preferably, the clamping end face is provided with an end face boss, and the outer diameter of the end face boss is smaller than the outer diameter of the clamping part. Through the design of boss, cutter and anchor clamps terminal surface distance when can avoid processing the product are too near for the iron fillings that processing produced can't get rid of and block the terminal surface between cutter and anchor clamps, influence product processingquality.

Preferably, a side of the clamping portion, which is close to the clamping end face, is a shrinkage portion, and the outer portion of the shrinkage portion is tapered. The contraction part has the function of simultaneously and inwards tightening each clamping claw through the contraction ring matched with the contraction part, so that the workpiece is clamped tightly.

Preferably, a cylindrical surface is arranged on one side of the contraction part, which is close to the end surface boss, and the diameter of the cylindrical surface is 2-3 mm larger than that of the connecting part. The diameter of the cylindrical surface is not smaller than the diameter of the main shaft because if the diameter of the cylindrical surface is smaller than the diameter of the main shaft, the matching of the taper of the main shaft and the taper of the clamp can be affected, and the step can appear when the taper surface of the main shaft is used for a long time, so that the clamping precision of equipment is affected.

The beneficial effects of the utility model are as follows:

through designing the centre gripping hole as circular, then can the polygonal product of centre gripping different shapes, for example triangle product, four corners product, pentagon product, hexagonal product, cylindricality product etc. circular shape centre gripping hole all can the centre gripping to improve the commonality of this anchor clamps. Meanwhile, by arranging the wavy grooves between the adjacent clamping claws, for example, the wavy grooves can be tooth-shaped mutually meshed grooves, wavy gaps are formed between the wavy grooves, so that straight-line gaps like straight grooves can not appear between the clamping claws, and the chamfering parts of polygonal products are prevented from being clamped and clamped in the grooves. The chamfer of the hexagonal nut is damaged by clamping. On the other hand, the circular clamping hole can also ensure that the clamping product is not eccentric, and the centering adjustment is not needed, so that the production efficiency is improved.

Drawings

FIG. 1 is a schematic front view of an embodiment of a numerical control fixture of the present utility model;

FIG. 2 is a schematic right-side view of an embodiment of the numerical control fixture of the present utility model;

FIG. 3 is a schematic view of the numerical control fixture of the present utility model with a hex product installed.

In the above figures: 1. a clamping part; 11. a clamping hole; 12. clamping claws; 13. a wave trough; 14. a clamp middle groove; 15. an end face boss; 16. a constriction; 17. a cylindrical surface; 2. a connection part; 21. an internal threaded hole; 22. a straight groove; 23. a round hole; 3. hexagonal products.

Detailed Description

The present utility model will be further described with reference to the drawings and examples, and it should be noted that in the description of the present utility model, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific manner, and thus should not be construed as limiting the present utility model. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1 and 3, the utility model provides a numerical control clamp for special-shaped materials, which comprises a clamping part 1, wherein the inside of the clamping part 1 is provided with a circular clamping hole 11; the clamping part 1 is divided into a plurality of clamping claws 12 which can be separated from each other, wave grooves 13 are formed between the adjacent clamping claws 12, and the wave grooves 13 extend to the clamping end surfaces of the clamping part 1. Meanwhile, one end of the clamping part 1 far away from the clamping end face is a connecting part 2, and an internal threaded hole 21 is formed in the connecting part 2. The connecting part 2 and the clamping part 1 are manufactured in an integral mode, and an internal threaded hole 21 of the connecting part 2 is used for being in threaded fit locking with a main shaft pull rod.

In the above implementation, by designing the clamping hole 11 to be circular, polygonal products of different shapes, such as triangular products, tetragonal products, pentagonal products, hexagonal products 3, cylindrical products, etc., can be clamped, and the circular clamping hole 11 can be clamped, thereby improving the versatility of the clamp. Meanwhile, by forming the wavy slots 13 between the adjacent clamping claws 12, for example, the wavy slots 13 can be toothed intermeshing slots, and wavy gaps are formed between the wavy slots, so that straight-line gaps such as straight slots 22 can not appear between the clamping claws 12, and the chamfering parts of polygonal products are prevented from being clamped and clamped in the slots, so that the chamfering angles of the hexagonal nuts are damaged. On the other hand, the circular clamping hole 11 can also ensure that the clamping product is not eccentric, and the centering adjustment is not needed, so that the production efficiency is improved. As shown in fig. 3, a schematic view of the installation of the hexagonal product 3 using the present numerical control jig is shown.

More specifically, the connecting portion 2 is provided with a straight groove 22 communicating with the wave groove 13, the groove width of the straight groove 22 is equal to the groove width of the wave groove 13, the end of the straight groove 22 is provided with a round hole 23 communicating with the straight groove 22, and the diameter of the round hole 23 is larger than the groove width of the straight groove 22. The grooved design of the wave grooves 13 and the straight grooves 22 are designed to separate the clamping jaws 12 and to recharge the product to be clamped. By the design of the straight groove 22 and the round hole 23, the stress concentration of the grooving end can be reduced, and the grooving end of the clamping claw 12 is prevented from being cracked under force. Meanwhile, the circular holes can better disperse stress.

Further, the diameter of the internal threaded hole 21 is larger than that of the clamping hole 11, and the internal threaded hole 21 and the clamping hole 11 are excessively connected through a conical hole and simultaneously positioned for spindle loading. The clamping part 1 is provided with a groove 14 in the clamp at one end near the connecting part 2, and the diameter of the groove 14 in the clamp is smaller than the outer diameter of the connecting part 2. The groove 14 in the clamp can avoid the problem that the clamp cannot rotate when the clamp is replaced because the oil stain and the scrap iron foam are clamped in the clamp after entering the checking fixture from the groove.

In order to avoid clamping stagnation caused by scrap iron, the clamping end face is provided with an end face boss 15, and the outer diameter of the end face boss 15 is smaller than that of the clamping part 1. Through the design of boss, cutter and anchor clamps terminal surface distance when can avoiding processing the product are too near for the iron fillings that processing produced can't get rid of and block the terminal surface between cutter and anchor clamps, influence product processingquality. The clamping part 1 is provided with a contraction part 16 at one side close to the clamping end surface, and the outer part of the contraction part 16 is conical. The constriction 16 serves to simultaneously tighten the clamping jaws 12 inwards by means of a matching constriction ring, thereby clamping the workpiece. In this embodiment, the constriction 16 is provided with a cylindrical surface 17 on the side of the end face boss 15, the diameter of the cylindrical surface 17 being 2-3 mm greater than the diameter of the connection 2. The cylindrical surface 17 is the maximum outer diameter position of the clamping part 1, and the diameter of the cylindrical surface 17 cannot be smaller than the diameter of the main shaft, because if the diameter of the cylindrical surface 17 is smaller than the diameter of the main shaft, the matching of the taper of the main shaft and the taper of the clamp can be affected, and the step can appear when the taper surface of the main shaft is used for a long time, so that the clamping precision of equipment is affected.

The foregoing describes in detail preferred embodiments of the present utility model. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the utility model by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.

Claims

1. A special-shaped material numerical control clamp is characterized in that: comprises a clamping part (1), wherein the inside of the clamping part (1) is provided with a circular clamping hole (11); the clamping part (1) is divided into a plurality of clamping claws (12) which can be separated from each other, wave grooves (13) are formed between the adjacent clamping claws (12), and the wave grooves (13) extend to the clamping end surfaces of the clamping part (1).

2. The profiled material numerically controlled clamp as in claim 1, wherein: the clamping part (1) is far away from one end of the clamping end face and is a connecting part (2), and an internal threaded hole (21) is formed in the connecting part (2).

3. The profiled material numerically controlled clamp as in claim 2, wherein: the connecting part (2) is provided with a straight groove (22) communicated with the wave groove (13).

4. A profiled material numerical control clamp as defined in claim 3 wherein: the tail end of the straight groove (22) is provided with a round hole (23) communicated with the straight groove (22), and the diameter of the round hole (23) is larger than the groove width of the straight groove (22).

5. A profiled material numerical control clamp as defined in claim 3 wherein: the groove width of the straight groove (22) is equal to the groove width of the wave groove (13).

6. The profiled material numerically controlled clamp as in claim 2, wherein: the diameter of the internal thread hole (21) is larger than the diameter of the clamping hole (11).

7. The profiled material numerically controlled clamp as in claim 2, wherein: the clamping part (1) is provided with a clamp middle groove (14) at one end close to the connecting part (2), and the diameter of the clamp middle groove (14) is smaller than the outer diameter of the connecting part (2).

8. The profiled material numerically controlled clamp as in claim 1, wherein: the clamping end face is provided with an end face boss (15), and the outer diameter of the end face boss (15) is smaller than the outer diameter of the clamping part (1).

9. The profiled material numerically controlled clamp as in claim 8, wherein: the clamping part (1) is provided with a contraction part (16) at one side close to the clamping end face, and the outer part of the contraction part (16) is conical.

10. The profiled material numerically controlled clamp as in claim 9, wherein: and a cylindrical surface (17) is arranged on one side of the contraction part (16) close to the end surface boss (15), and the diameter of the cylindrical surface (17) is 2-3 mm larger than that of the main shaft.