CN210358789U

CN210358789U - Get rid of mould structure of cold-heading side cut burr

Info

Publication number: CN210358789U
Application number: CN201921111933.2U
Authority: CN
Inventors: 饶陈伟; 孙浩; 李飞云
Original assignee: SUZHOU SHINING HIGH STRENGTH FASTENER CO Ltd
Current assignee: SUZHOU SHINING HIGH STRENGTH FASTENER CO Ltd
Priority date: 2019-07-16
Filing date: 2019-07-16
Publication date: 2020-04-21
Anticipated expiration: 2029-07-16

Abstract

The utility model relates to a get rid of mould structure of cold-heading side cut burr, it includes: trimming an upper die; the side cut lower mould, the side cut lower mould include with first mould shell sets up relatively and the middle part set up the second mould shell of perforating hole, by second mould shell terminal surface embedding in it and with the second side cut tool bit, the card that first side cut tool bit set up in opposite directions establish in the perforating hole and extend to penetrate guide cover, detachably install of another terminal surface of second mould shell apron, install in the perforating hole and cover establish join in marriage the pressure spring on the guide cover and run through apron and one end extend to insert to thimble in the guide cover. Can utilize the cooperation of first side cut tool bit, second side cut tool bit, thimble to extrude, cut edge the head of bolt like this, it is very convenient to get rid of the burr, avoids carrying out subsequent machine tooling, is favorable to improving production efficiency and reduce cost.

Description

Get rid of mould structure of cold-heading side cut burr

Technical Field

The utility model belongs to the mould field, concretely relates to get rid of mould structure of cold-heading side cut burr.

Background

Fasteners are a generic term for a class of mechanical parts used to join two or more parts (or components) together. A wide variety of fasteners are found on a variety of machinery, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, chemical, instrumentation, and the like.

At present, most of bolts in the market are processed by using a cold heading die. Due to the fact that the cold heading die has a certain gap, the bolt can be pressed in the cold heading process and enters the gap, and burrs are formed at the edge of a product finally. At present, the burrs are usually removed by adopting a machining mode, and obviously, the labor and the time are wasted.

Disclosure of Invention

The utility model aims at providing a get rid of mould structure of cold-heading side cut burr in order to overcome prior art not enough.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a get rid of mould structure of cold-heading side cut burr, it includes:

the trimming upper die comprises a first die shell and a first trimming tool bit embedded into the first die shell from the end face of the first die shell, a first through hole is formed in the first die shell, and a first material passing hole communicated with the first through hole is formed in the first trimming tool bit;

the side cut lower mould, the side cut lower mould include with first mould shell sets up relatively and the middle part set up the second mould shell of perforating hole, by second mould shell terminal surface embedding in it and with the second side cut tool bit, the card that first side cut tool bit set up in opposite directions establish in the perforating hole and extend to penetrate guide cover, detachably install of another terminal surface of second mould shell apron, install in the perforating hole and cover establish join in marriage the pressure spring on the guide cover and run through apron and one end extend to insert to thimble in the guide cover.

Optimally, be provided with annular step portion on the outer wall of the last mould of cutting edge and offer and be located the first joint recess in the annular step portion outside, still be equipped with on the last mould of cutting edge and extend to the first spacing hole of first cutting edge tool bit outer wall department.

Optimally, a plurality of second limiting holes extending to the outer wall of the second edge cutting tool bit are formed in the second formwork.

Preferably, the cover panel is removably mountable to the second formwork by a plurality of bolts.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses get rid of mould structure of cold-heading side cut burr, through adopting the side cut of specific structure to go up the mould and the side cut lower mould cooperates, can utilize the cooperation of first side cut tool bit, second side cut tool bit, thimble to extrude, cut edge the head of bolt like this, and the deburring is very convenient, avoids carrying out subsequent machining, is favorable to improving production efficiency and reduce cost.

Drawings

Fig. 1 is the utility model discloses get rid of the structural schematic diagram of the mould structure of cold-heading side cut burr.

Detailed Description

The invention will be further described with reference to examples of embodiments shown in the drawings.

The die structure for removing the cold heading trimming burrs as shown in fig. 1 mainly comprises a trimming upper die 1, a trimming lower die 2 and the like which are matched with each other.

The trimming upper die 1 mainly comprises a first die shell 11, a first trimming cutter head 12 and the like; a first through hole 113 is formed in the first mold shell 11; the first trimming blade 12 is embedded into the end surface (the surface opposite to the trimming lower die 2) of the first die shell 11, and a first feeding hole 121 communicated with the first through hole 113 is formed inside the first trimming blade (in this way, the first feeding hole 121 is matched with the first through hole 113, and the bolt 3 can pass through the first feeding hole and the first through hole). In this embodiment, the outer wall of the trimming upper die 1 is provided with an annular step portion 111, the outer wall of the trimming upper die 1 is further provided with a first clamping groove 112 located outside the annular step portion 111 (away from the side of the trimming lower die 2), and the trimming upper die 1 is further provided with a first limiting hole 114 extending to the outer wall of the first trimming bit 12 (the first limiting hole 114 is formed in the end portion of the trimming upper die 1 and corresponds to the first trimming bit 12, and a screw, a bolt and the like can be installed in the first limiting hole 114 to limit and fix the first trimming bit 12).

The trimming lower die 2 mainly comprises a second die shell 21, a second trimming tool bit 23, a cover plate 24, a matched pressure spring 26, a thimble 27, a material guide sleeve 28 and the like; the second mould shell 21 is arranged at one side of the first mould shell 11 and is opposite to the first mould shell, and the middle part of the second mould shell is provided with a through hole 22 (which has a structure matched with the material guide sleeve 28); the second edge cutting tool bit 23 is embedded into the second mould shell 21 from the end surface (the surface opposite to the edge cutting upper mould 1) and is arranged opposite to the first edge cutting tool bit 12 for matching; the material guiding sleeve 28 is clamped in the through hole 22, and the end part of the material guiding sleeve also extends into the second edge cutting head 23; a cover plate 24 is detachably mounted on the other end face of the second formwork 21 (the cover plate 24 is detachably mounted on the second formwork 21 by a plurality of bolts 25); the matched pressure spring 26 is arranged in the through hole 22 and sleeved on the material guide sleeve 28, so that the material guide sleeve 28 can be reset in time in the working process of the die for removing the cold heading trimming burrs; the thimble 27 penetrates the cover plate 24 and has one end extending to be inserted into the material guiding sleeve 28. In this embodiment, the second mold shell 21 is provided with a plurality of second limiting holes 211 extending to the outer wall of the second trimming blade 23, and similarly, screws, bolts and other members can be installed in the second limiting holes 211 to limit and fix the second trimming blade 23.

When in use, the thread part of the bolt 3 is inserted into the material guide sleeve 28, and external force is applied to the thread part to press the head part into the second trimming cutter head 23 so as to realize primary trimming; after the external force is released, the matched compression spring 26 is reset to extrude the bolt 3 (if the bolt is clamped, the ejector pin 27 can be used for pushing the ejector pin 27 to push the bolt 3 out of the second trimming cutter head 23 and into the first trimming cutter head 12 (trimming again), and finally the bolt is output from the first through hole 113.

In this embodiment, the first through hole 113 includes a first pinhole section, a second pinhole section and a third pinhole section that are connected in sequence (from the upper trimming die 1 to the square of the lower trimming die 2), and the diameter of the third pinhole section is slightly smaller than that of the first pinhole section. The first and

second trimming bits

12 and 23 have substantially the same shape and structure, and include an annular or square body, a knife hole formed at the center of the body (the knife hole is formed at the outer end face of the first or

second trimming bit

12 or 23, and the diameter thereof gradually increases in the direction away from the outer end face), and a through hole (the diameter of the through hole is larger than the diameter of the knife hole) formed in the body and communicated with the knife hole, wherein one end of the material guiding sleeve 28 is inserted into the knife hole through the through hole of the second trimming bit 23; in this embodiment, the material guiding sleeve 28 includes a die sleeve body contacting with the inner wall of the second die shell 21, a first extending protrusion formed on an end surface of the die sleeve body and having a diameter smaller than the diameter of the die sleeve body (such that a receiving space is formed between the first extending protrusion and the second die shell 21 for receiving the pressure spring 26), and a second extending protrusion formed on the other end surface of the die sleeve body and matching with the inner wall of the second trimming bit 23; the structure is beneficial to improving the trimming and deburring effect of the bolt 3 and facilitating the separation of the bolt 3 and the die structure.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The utility model provides a get rid of mould structure of cold-heading side cut burr, its characterized in that, it includes:

the trimming upper die (1) comprises a first die shell (11) and a first trimming tool bit (12) embedded into the first die shell (11) from the end face of the first die shell, a first through hole (113) is formed in the first die shell (11), and a first material passing hole (121) communicated with the first through hole (113) is formed in the first trimming tool bit (12);

side cut lower mould (2), side cut lower mould (2) include with first mould shell (11) set up relatively and the middle part seted up second mould shell (21) of perforating hole (22), by second mould shell (21) terminal surface imbed in it and with second side cut tool bit (23), the card that first side cut tool bit (12) set up in opposite directions is established in perforating hole (22) and extend to penetrate guide cover (28), detachably in second side cut tool bit (23) install apron (24) of another terminal surface of second mould shell (21), install in perforating hole (22) and the cover establish join in marriage pressure spring (26) on guide cover (28) and run through apron (24) and one end extend to insert to thimble (27) in guide cover (28).

2. The die structure for removing cold-heading trimming burrs as claimed in claim 1, wherein: be provided with annular step portion (111) and offer on the outer wall of side cut last mould (1) and be located first joint recess (112) in annular step portion (111) outside, it extends to still to be equipped with on the side cut last mould (1) first spacing hole (114) of first side cut tool bit (12) outer wall department.

3. The die structure for removing cold-heading trimming burrs as claimed in claim 1, wherein: and a plurality of second limiting holes (211) extending to the outer wall of the second trimming cutter head (23) are formed in the second formwork (21).

4. The die structure for removing cold-heading trimming burrs as claimed in claim 1, wherein: the cover plate (24) is detachably mounted on the second formwork (21) by means of a plurality of bolts (25).