CN210360879U

CN210360879U - Clamping tool for grinding polygonal punch

Info

Publication number: CN210360879U
Application number: CN201921183272.4U
Authority: CN
Inventors: 陈建国
Original assignee: Chongqing Xinyuli Metal Technology Co ltd
Current assignee: Chongqing Xinyuli Metal Technology Co ltd
Priority date: 2019-07-25
Filing date: 2019-07-25
Publication date: 2020-04-21
Anticipated expiration: 2029-07-25

Abstract

The utility model provides a centre gripping frock for grinding polygon drift, it includes: the prism-shaped main body part is provided with a first through hole at the center, at least two sliding grooves are symmetrically arranged on the inner wall of the first through hole, and the depth of each sliding groove is gradually reduced in the direction from the end face of the main body part to the center of the main body part; the guide part is fixedly connected to one end, close to the sliding chute, of the main body part, and a second through hole which is coaxial and communicated with the first through hole is also formed in the center of the guide part; the clamping pieces are matched with the sliding grooves and are slidably arranged in the sliding grooves in a one-to-one correspondence manner; and the pushing part is arranged outside the guide part and can move along the central shaft of the second through hole so as to drive the clamping piece to slide along the sliding groove. The utility model has the advantages of being simple in manufacture and convenient in operation, machining quality can also be guaranteed, need not to adopt numerically control grinder also can process qualified drift, practiced thrift the cost.

Description

Clamping tool for grinding polygonal punch

Technical Field

The utility model relates to the field of machining, especially, relate to a centre gripping frock for abrasive machining polygon drift.

Background

The punch is a metal part on a stamping die in a machine tool, and is called a stamping rod, a stamping pin or a punch, and is installed on the stamping die for continuous punching, stamping and breaking operation, so that the processed material is separated or plastically deformed, and a required finished product or semi-finished product is obtained. The punch generally includes a circular punch, a hexagonal punch, an elliptical punch, a fan-shaped punch, a shaped punch, and the like according to the shape. For a hexagonal punch or a polygonal punch, materials such as tungsten carbide and the like are generally sintered into blanks, and then the blanks are ground into required shapes, for the grinding process, some small processing factories firstly draw some marking lines on the surface of the cylindrical blanks, and then directly place the blanks on a grinding machine for manual grinding, and the processing mode has low precision; some larger manufacturing enterprises directly adopt the numerically controlled grinder to grind, and the cost of the punch machining is high due to the high cost of the numerically controlled grinder and the high requirement on the operation technology of workers.

SUMMERY OF THE UTILITY MODEL

Not enough to exist among the prior art, the utility model provides a centre gripping frock for grinding polygon drift, it has solved among the prior art precision that manual processing drift exists not high and adopt the higher problem of cost that numerically control grinder processing drift leads to.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a centre gripping frock for grinding polygon drift, it includes:

the punch pin comprises a prismatic main body part, a punch pin body and a punch pin, wherein the center of the prismatic main body part is provided with a first through hole for placing a punch pin, the inner wall of the first through hole is symmetrically provided with at least two sliding grooves, the sliding grooves extend to the center of the main body part along the central axis of the first through hole, and the depth of the sliding grooves is gradually reduced in the direction from the end surface of the main body part to the center of the main body part;

the guide part is fixedly connected to one end, close to the sliding chute, of the main body part, a second through hole for placing a punch is also formed in the center of the guide part, and the second through hole is coaxial and communicated with the first through hole;

the clamping pieces are matched with the sliding grooves and are slidably arranged in the sliding grooves in a one-to-one correspondence manner;

and the pushing part is arranged outside the guide part and can move along the central shaft of the second through hole so as to drive the clamping piece to slide along the sliding groove.

The principle of the utility model is that: when the punch is used, the punch to be ground is inserted into the first through hole and the second through hole, then the pushing part is driven to move towards one end close to the main body part along the central shaft of the second through hole, and then the two clamping pieces are driven to slide towards the direction close to the center of the main body part along the two sliding grooves; then, the main body part is fixed on a grinding machine in a magnetic absorption mode and the like, the grinding wheel is started to grind the punch, after one plane is machined, the main body part is rotated to machine the other plane of the punch, and the process is repeated for many times, so that the cylindrical punch can be ground into the polygonal punch.

Compared with the prior art, the utility model discloses following beneficial effect has: simple manufacture and low cost, convenient operation when being used for processing polygon drift, and a plurality of holder symmetric distribution can guarantee that drift center pin and main part center pin are coaxial, and then guarantee processingquality, need not to adopt numerically control grinder also can process qualified drift, practiced thrift the cost.

Drawings

Fig. 1 is a schematic diagram of the structure explosion of the present invention.

Fig. 2 is a schematic view of the usage state of the present invention.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments.

As shown in fig. 1, the utility model provides a centre gripping frock for grinding polygon drift, it includes main part 10, guide part 20, holder 30 and promotion portion 40, wherein:

the main body part 10 is a prism-shaped structure, a first through hole 11 for placing the punch 90 is formed in the center of the main body part 10, at least two sliding grooves 12 are symmetrically formed in the inner wall of the first through hole 11, the sliding grooves 12 extend to the center of the main body part 10 along the central axis of the first through hole 11, and the depth of the sliding grooves 12 is gradually reduced in the direction from the end face of the main body part 10 to the center of the main body part 10; specifically, taking the hexagonal punch 90 as an example for machining, the main body 10 is correspondingly hexagonal prism-shaped as a whole, and preferably, the main body 10 can be formed by combining two halves of the single body 100, so that the machining is more convenient, wherein each single body 100 is a quadrangular prism with an isosceles trapezoid cross section, an arc-shaped groove 101 is milled on the surface of the single body 100 during the machining, then an oblique sliding groove 12 is milled on the side wall of the arc-shaped groove 101, and then the two single bodies 100 are fixed into a whole by means of bolt fixing or welding, so that a hexagonal prism-shaped structure can be obtained, wherein the first through hole 11 is formed by combining two arc-shaped grooves 101;

the guide part 20 is fixedly connected to one end of the main body part 10 close to the chute 12, and the center of the guide part is also provided with a second through hole 21 for placing the punch 90, and the second through hole 21 is coaxial and communicated with the first through hole 11 so as to adapt to the longer punch 90; in addition, the side wall of the guide part 20 is provided with at least two guide grooves 22 matched with the clamping pieces 30; the guide part 20 can be fixed at the end of the main body part 10 by welding, and in addition, a flange connecting part can be added at the end of the guide part 20, so that the guide part can be detachably connected with the main body part 10 by adopting a bolt fixing way;

the number of the clamping pieces 30 is at least two, the clamping pieces are matched with the sliding chute 12, and the clamping pieces 30 are slidably mounted in the sliding chute 12 in a one-to-one correspondence manner; preferably, the clamping member 30 is a strip, a guide inclined surface 31 matched with the sliding groove 12 is arranged on one side of one end of the clamping member 30, which is away from the first through hole 11, a clamping surface 32 parallel to the central axis of the first through hole 11 is arranged on one side of the clamping member 30, which faces the first through hole 11, and the clamping surface 32 can be a cylindrical surface, as shown in fig. 2, because the guide inclined surface 31 is matched with the bottom surface of the sliding groove 12, the clamping surface 32 can always be parallel to the central axis of the first through hole 11 when the clamping member 30 slides, so that the contact area of the clamping member 30 is larger when clamping the punch 90, and the clamping is more stable;

the pushing part 40 is installed outside the guide part 20 and can move along the central axis of the second through hole 21 for driving the clamping piece 30 to slide along the sliding chute 12; preferably, the guide portion 20 is a cylinder and is provided with an external thread on the outer circumference thereof, and the pushing portion 40 is also a cylindrical structure and is connected to the outside of the guide portion 20 through a thread, as shown in fig. 2, in operation, after the punch 90 is placed in the first through hole 11 and the second through hole 21, the pushing portion 40 is rotated to move back and forth along the axial direction of the second through hole 21, so that the operation is more convenient, the thread connection mode has an automatic locking function, and the clamping member 30 can be effectively prevented from being loosened.

Preferably, the cross section of the sliding groove 12 is a T-shaped structure, and one end of the clamping member 30 is provided with two widened limiting wings 33 to match with the T-shaped structure of the sliding groove 12, so that the clamping member 30 can be more stably slid, and further, the guide inclined surface 31 can be always kept parallel to the surface of the punch 90.

As shown in fig. 1 and 2, preferably, one end of the clamping member 30, which is away from the center of the main body 10, is provided with a limiting protrusion 34 extending outward, the pushing member 40 is a cylindrical structure having an inner hole, the inner wall of the inner hole is provided with a ring-shaped limiting groove 41 to match with the limiting protrusion 34, the width of the limiting groove 41 is not less than the thickness of the limiting protrusion 34, specifically, the pushing member 40 can be composed of an inner cylinder 401 and an outer cylinder 402, wherein the inner cylinder 401 is a cylinder having a threaded hole at the center and a plurality of threaded holes are formed on the outer surface thereof, the outer cylinder 402 is also cylindrical and is fixed outside the inner cylinder 401 by bolts, the inner wall of the outer cylinder 402, which is away from the inner cylinder 401, is provided with a ring-shaped protrusion, a gap is left between the protrusion 403 and the end of the inner cylinder 401 to form the ring-shaped limiting groove 41, one end of the clamping member 30, which is away from the guiding inclined surface 31, because the limiting groove 41 is also annular, the whole pushing portion 40 cannot drive the clamping member 30 to rotate together when rotating, and under the action of the limiting groove 41, the pushing portion 40 can drive the clamping member 30 to synchronously generate axial displacement when axially displacing relative to the guide portion 20.

As shown in fig. 2, after through the utility model discloses after grasping drift 90, can place main part 10 on the base 91 of grinding machine and through magnetism inhale the mode etc. fixed, then start emery wheel 92, can grind drift 90, after abrasive machining goes out a plane, rotate main part 10 again and process another plane of drift 90 to this analogizes and can finally obtain the hexagonal drift 90 of size accuracy. After the machining is completed, the main body 10 is removed, and the pushing portion 40 is rotated to be away from the main body 10, so that the clamping members 30 can be pulled in the direction away from the main body, and meanwhile, the two clamping members 30 slide outwards and obliquely, so that the punch 90 can be loosened.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. A centre gripping frock for grinding polygon drift, its characterized in that includes:

2. The clamping tool for grinding the polygonal punch according to claim 1, wherein: the cross section of the sliding groove is of a T-shaped structure, and two widened limiting wings are arranged at one end of the clamping piece to be matched with the T-shaped structure of the sliding groove.

3. The clamping tool for grinding the polygonal punch according to claim 1, wherein: the clamping piece is long-strip-shaped, one side, deviating from the first through hole, of one end of the clamping piece is provided with a guide inclined plane matched with the sliding groove, and a clamping surface parallel to the central axis of the first through hole is arranged on one side, facing the first through hole, of the clamping piece.

4. The clamping tool for grinding the polygonal punch according to claim 1, wherein: the guide part is a cylinder, external threads are arranged on the outer circumference of the guide part, and the pushing part is connected to the outer part of the guide part through threads.

5. The clamping tool for grinding the polygonal punch according to claim 1, wherein: the lateral wall of guide part is equipped with two at least guide ways with holder assorted.

6. The clamping tool for grinding the polygonal punch according to claim 1, wherein: the holder keep away from main part center one end and be provided with the spacing arch of outside extension, the tubular structure of promotion portion for having the hole, the inner wall of hole is equipped with the annular spacing groove of round in order to realize with spacing protruding phase-match.