CN216096223U

CN216096223U - Inner hexagonal red heading die

Info

Publication number: CN216096223U
Application number: CN202121478046.6U
Authority: CN
Inventors: 费纪华
Original assignee: Chongqing Standard Fastners Industrial Co ltd
Current assignee: Chongqing Standard Fastners Industrial Co ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2022-03-22
Anticipated expiration: 2031-06-30

Abstract

The utility model discloses an inner hexagonal red heading die in the field of bolt production equipment, which comprises an upper die and a lower die, wherein the upper die comprises an upper die punch, a punch sleeve is arranged on the outer side of the upper die punch, the lower die comprises a base, a lower die polished rod die is arranged in the middle of the base, and a guide sleeve is arranged above the lower die polished rod die. The utility model can solve the problem that the inner hexagonal hole and the stud are eccentric easily due to inaccurate upper die in the hot heading processing of the inner hexagonal stud in the prior art, and ensures that the inner hexagonal hole subjected to the hot heading is superposed with the center of a circle of a workpiece.

Description

Inner hexagonal red heading die

Technical Field

The utility model relates to the field of bolt production equipment, in particular to an inner hexagonal red heading die.

Background

The existing production process of the hexagon socket screw stud comprises the step of upsetting a blank heated to red in an upsetting die by a punch, also called red upsetting. In the existing red heading process, in order to expand the length range of a product stamped by a stamping machine, an upper die generally adopts a design capable of moving back and forth, so that a longer product can be conveniently loaded into a lower die. However, when the structure is adopted for punching, the position of the upper die is easy to move, and the upper die is inaccurate in positioning, so that the inner hexagonal hole obtained by red heading processing is inclined relative to the circle center of the stud, and the quality and the use of the inner hexagonal stud product are influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an inner hexagonal red heading die to solve the problem that in the prior art, an inner hexagonal hole and a stud are eccentric due to inaccurate upper die in the process of inner hexagonal stud red heading.

In order to achieve the purpose, the basic technical scheme of the utility model is as follows: hexagonal red-heading mould in, including last mould and lower mould, go up the mould and include the mould drift, the outside of going up the mould drift is equipped with the drift cover, and the lower mould includes the base, and the base middle part is equipped with lower mould polished rod mould, and the top of lower mould polished rod mould is equipped with the uide bushing.

The principle and the advantages of the scheme are as follows: in practical application, after the die is assembled, the die is respectively fixed on an upper die mounting seat and a lower die mounting seat of a punching machine by using bolts, the base is used as a base body of a lower die, the lower die polish rod die is used as a polish rod forming die of the inner hexagonal stud, an upper die punch is driven by the punching machine to be extruded downwards, the punch sleeve is matched with the guide sleeve, the punch sleeve is inserted into the guide sleeve in the punching process, the guide sleeve guides and centers the punch sleeve and the upper die punch in the punching process, the punch sleeve is ensured to be kept stable in the punching process of the upper die punch, the inner hexagonal hole of the punch forming is kept concentric relative to the circle center of the stud, and the problem of product quality caused by the fact that the inner hexagonal hole is inclined relative to the circle center of the stud due to inaccurate positioning of the upper die punch in the punching process is avoided.

Further, a punch chamfer is processed at the bottom end of the outer side wall of the punch sleeve. The punch sleeve can enter the guide sleeve more accurately and stably in the punching process as the preferable setting through the punch chamfer, and the stability and the positioning accuracy of the upper die punch in the punching process are further ensured.

Furthermore, a guide chamfer is machined at the top end of the inner side wall of the guide sleeve. As the preferred guide chamfer is matched with the punch chamfer, the punch sleeve and the upper die punch can be better guided and centered in the pressing movement in the punching process, the upper die punch is ensured to be accurately and stably positioned, and the punch forming hexagon socket hole and the stud are ensured to be concentric.

Furthermore, a punch spacer bush is arranged in the punch bush, and the upper die punch is positioned in the punch spacer bush. Preferably, the punch spacer bush can form transition between the upper die punch and the punch bush, so that the movable gap of the upper die punch is reduced, the upper die punch is accurately positioned, and the upper die punch and the lower die are accurately positioned in a centering way.

Further, a polish rod mold spacer bush is sleeved on the outer side of the lower mold polish rod mold. The lower die polished rod die can be limited through the polished rod die spacer sleeve preferably, the movable gap of the polished rod die is reduced, the lower die polished rod die and the upper die punch are accurately aligned, and the punching accuracy is further guaranteed.

Further, the punch chamfer length is greater than the guide chamfer length. Like this preferably in punching process uide bushing can continue to move the direction to the drift cover, the contact of drift cover and uide bushing is more steady smooth and easy, and is more stable effective to going up the centering of mould drift and lower mould polished rod mould.

Drawings

FIG. 1 is a cross-sectional view of an embodiment of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the punch comprises a base 1, a punch sleeve 2, a punch spacer 3, an upper die punch 4, a guide sleeve 5, a lower die polished rod die 6, a polished rod die spacer 7, a guide chamfer 8 and a punch chamfer 9.

The embodiment is basically as shown in the attached figure 1: hexagonal red mould of upsetting in, including last mould and lower mould, go up the mould and include mould drift 4, go up 4 lower parts of mould drift and be hexagonal prism form, the bottom of going up mould drift 4 is the taper, goes up the top integrated into one piece of mould drift 4 and has a spacing block, and the outside cover of going up mould drift 4 is equipped with drift spacer 3, and the hole top processing of drift spacer 3 has spacing step, and the spacing block of going up mould drift 4 is pressed and is put on spacing step. The top end of the punch spacer 3 is integrally formed with a positioning table extending outwards, a punch sleeve 2 is sleeved on the outer side of the punch spacer 3, the side wall of the lower part of an inner hole of the punch sleeve 2 protrudes inwards to form a positioning step, the positioning table is pressed on the positioning step, and a punch chamfer 9 is processed at the bottom end of the outer side wall of the punch sleeve 2. The lower mould includes base 1, and base 1 middle part is equipped with the mounting hole, has placed polished rod mould spacer 7 in the mounting hole, and lower mould polished rod mould 6 has been inserted at polished rod mould spacer 7 middle part, and the mounting hole interpolation of polished rod mould spacer 7 top has put uide bushing 5, and the inside wall top processing of uide bushing 5 has direction chamfer 8, and drift chamfer 9 length is greater than the length of direction chamfer 8.

The specific implementation process is as follows: in the process of hot heading and stamping of the inner hexagonal screw, a stamping output rod of a stamping machine is connected in the punch sleeve 2 and is abutted against the punch spacer 3 and the upper die punch 4. During processing, a blank heated to red is placed in the guide sleeve 5, the punch press acts to drive the punch sleeve 2 and the punch spacer 3 to move downwards, when the punch sleeve 2 moves downwards to be in contact with the guide sleeve 5, the punch chamfer 9 at the bottom end of the punch sleeve 2 moves downwards stably along the guide chamfer 8 on the guide sleeve 5, the punching process of the upper die punch 4 is guided and centered, and the upper die punch 4 and the lower die polished rod die 6 are ensured to be concentric. The upper die punch 4 extrudes the blank downwards, a hexagon socket is formed at the top end of the blank after die assembly, the hexagon socket is concentric with the screw rod below, and the formed hexagon socket stud after punching has reliable quality and is convenient and fast to use.

The foregoing is merely an example of the present invention and common general knowledge in the art of specific structures and/or features of the utility model has not been set forth herein in any way. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. Hexagonal red-heading mould in, including last mould and lower mould, its characterized in that: the upper die comprises an upper die punch, a punch sleeve is arranged on the outer side of the upper die punch, the lower die comprises a base, a lower die polished rod die is arranged in the middle of the base, and a guide sleeve is arranged above the lower die polished rod die.

2. The inner hexagonal red heading die of claim 1, wherein: and a punch chamfer is processed at the bottom end of the outer side wall of the punch sleeve.

3. The inner hexagonal red heading die of claim 2, wherein: and a guide chamfer is processed at the top end of the inner side wall of the guide sleeve.

4. The inner hexagonal red heading die of claim 3, wherein: the punch pin sleeve is internally provided with a punch pin spacer sleeve, and the upper die punch pin is positioned in the punch pin spacer sleeve.

5. The inner hexagonal red heading die of claim 4, wherein: and a polished rod mold spacer bush is sleeved on the outer side of the lower mold polished rod mold.

6. The inner hexagonal red heading die of claim 5, wherein: the punch chamfer length is greater than the guide chamfer length.