CN210359073U

CN210359073U - Die structure for directly molding lower die

Info

Publication number: CN210359073U
Application number: CN201921112948.0U
Authority: CN
Inventors: 饶陈伟; 梁建芳; 刘晓丽
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 lower mould direct forming's mould structure, it includes: the upper die assembly comprises a first die shell, a first die core embedded into the first die shell from the end face of the first die shell, a first groove formed in the other end face of the first die shell and extending inwards, a first cushion block arranged in the first groove, a first thimble hole formed in the first die core and extending to be communicated with the first groove, and a first thimble penetrating through the first thimble hole and being movable to a position where one end of the first thimble is contacted with the first cushion block; and a lower die assembly. Therefore, the outer plum blossom-shaped structure can be directly formed during bolt cold heading forming, subsequent machining operation is not needed, operation steps are simplified, and the production efficiency is improved.

Description

Die structure for directly molding lower die

Technical Field

The utility model belongs to the mould field relates to a lower mould direct forming's mould structure, concretely relates to mould structure for outer plum blossom with lower mould direct forming.

Background

The long and thin bolt is usually produced by cold heading, then plum blossom punching, punching and finally thread forming. The internal structure of the wire rod is not in the streamline trend and the strength is not high due to the processing steps, and the mechanical property of the final bolt product is influenced, so that the service life of the product is shortened. If can be directly with the plum blossom shaping in the cold-heading forming process, obviously be favorable to simplifying technological process, reduce cost is convenient for the control to bolt mechanical properties, consequently has realistic demand.

Disclosure of Invention

The utility model aims at providing a lower mould direct forming's mould structure in order to overcome prior art not enough.

In order to achieve the above object, the utility model provides a following technical scheme: a mold structure for direct molding of a lower mold, comprising:

the upper die assembly comprises a first die shell, a first die core embedded into the first die shell from the end face of the first die shell, a first groove formed in the other end face of the first die shell and extending inwards, a first cushion block arranged in the first groove, a first thimble hole formed in the first die core and extending to be communicated with the first groove, and a first thimble penetrating through the first thimble hole and being movable to a position where one end of the first thimble is contacted with the first cushion block;

lower mould subassembly, lower mould subassembly includes that second mould shell, the card that the perforating hole was seted up at the middle part is established in the perforating hole and with the die sleeve that first mould shell set up in opposite directions, set up in the perforating hole and with second cushion, second thimble hole that the die sleeve contacted and wear to locate second thimble in the second thimble hole, the die sleeve is including the cover body and inlay and locate the internal second mold core of cover, second thimble hole is seted up in the second mold core and is extended to and link up the second cushion, in the second thimble with first thimble tip in opposite directions is equipped with plum blossom shaping chamber.

Optimally, the through hole and the end part adjacent to the first mould shell form a convex ring, and the mould sleeve further comprises a clamping step which is formed on the sleeve body and matched with the convex ring.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses lower mould direct forming's mould structure cooperates through last mould subassembly and the lower mould subassembly that adopts specific structure, can directly form outer plum blossom structure like this when carrying out the bolt cold-heading shaping, need not carry out subsequent machining operation again, has simplified operating procedure, has improved from production efficiency.

Drawings

FIG. 1 is a schematic structural view of a mold structure for direct molding of a lower mold according to the present invention;

FIG. 2 is a schematic structural view of a mold structural mold sleeve for direct molding of a lower mold of the present invention;

fig. 3 is the utility model discloses lower mould direct forming's local enlarger of mould structure.

Detailed Description

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

The mold structure for directly molding the lower mold shown in fig. 1 to 3 mainly includes an upper mold assembly 1 and a lower mold assembly 2, which are engaged with each other.

The upper die assembly 1 comprises a first die shell 11, a first die core 12, a first groove 13, a first thimble hole 14, a first cushion block 15, a first thimble 16 and the like; the first mold core 12 is arranged in the first mold shell 11 and is embedded into the first mold shell 11 from the end surface of the first mold shell 11; the first groove 13 is arranged on the other end surface of the first mould shell 11 and extends towards the interior of the first mould shell, so that the first groove 13 and the first mould core 12 are arranged at intervals; the first cushion block 15 is arranged in the first groove 13 and can move in the first groove 13 under the action of external force; the first thimble hole 14 is arranged in the first mold core 12 and extends to be communicated with the first groove 13; the first thimble 16 is correspondingly inserted into the first thimble hole 14, and can move to one end to contact with the first cushion block 15 (the first cushion block 15 can provide a strong support for the first thimble 16 after being limited by an external structure), and when the first cushion block 15 moves under the action of an external force, the first thimble 16 can also move synchronously to abut against a bolt blank to be extruded.

The lower die assembly 2 comprises a second die shell 21, a through hole 22, a die sleeve 24, a second cushion block 25, a second ejector pin 26 and the like; the middle part of the second mould shell 21 is provided with a through hole 22; the die sleeve 24 is clamped in the through hole 22 and arranged opposite to the first die shell 11, so that the end surface of the die sleeve 24 and the end surface of the second die shell 21 are in the same plane; the second cushion block 25 is arranged in the through hole 22 and is contacted with the die sleeve 24, and the end surface of the second cushion block is in the same plane with the other end surface of the second die shell 21; a second thimble hole 244 is formed in the second mold core 243 and extends through the second spacer 25; the second thimble 26 is correspondingly arranged in the second thimble hole 244. In this embodiment, the mold sleeve 24 includes a sleeve body 241 (the sleeve body 241 is correspondingly disposed in the through hole 22) and a second mold core 243 embedded in the sleeve body 241, and a quincunx forming cavity 261 is disposed at an end of the second thimble 26 opposite to the first thimble 16; in the area located in the second mold core 243, the bore diameter of the second thimble hole 244 also gradually decreases to the size of the second thimble 26 for forming an embryonic form of the bolt during the cold heading process (the bolt is typically formed through multiple sets of molds, not one shot).

In this embodiment, a protruding ring 23 is formed at the end of the through hole 22 adjacent to the first mold shell 11, and the mold sleeve 24 further includes a locking step 242 formed on the sleeve 241 and matching with the protruding ring 23. When using, can press from both sides bolt blank 3 between last mould subassembly 1 and lower mould subassembly 2 (mould subassembly 1 and lower mould subassembly 2 are fixed), make it correspond and insert in first thimble hole 14 and second thimble hole 244, one end contacts with first thimble 16, applys external force and carries out punching press, cold-heading to bolt blank 3 to second thimble 26 for bolt blank 3 primary forming (including shape and outer plum blossom structure), and it can to realize final shaping to cooperate subsequent multichannel mould again.

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 lower mould direct forming's mould structure which characterized in that, it includes:

the mould comprises an upper mould component (1), wherein the upper mould component (1) comprises a first mould shell (11), a first mould core (12) embedded into the first mould shell (11) from one end surface of the first mould shell (11), a first groove (13) formed in the other end surface of the first mould shell (11) and extending inwards, a first cushion block (15) arranged in the first groove (13), a first thimble hole (14) formed in the first mould core (12) and extending to be communicated with the first groove (13), and a first thimble (16) penetrating through the first thimble hole (14) and moving to one end to be contacted with the first cushion block (15);

lower mould component (2), lower mould component (2) including the middle part set up second mould shell (21), the card of perforating hole (22) establish in perforating hole (22) and with die sleeve (24) that first mould shell (11) set up in opposite directions, set up in perforating hole (22) and with second cushion (25), second thimble hole (244) that die sleeve (24) contacted and wear to locate second thimble (26) in second thimble hole (244), die sleeve (24) are including the cover body (241) and inlay and locate second mold core (243) in the cover body (241), second thimble hole (244) are seted up in second mold core (243) and are extended to link up second cushion (25), in second thimble (26) with first thimble (16) tip in opposite directions is equipped with plum blossom shaping chamber (261).

2. The mold structure for direct molding of a lower mold according to claim 1, wherein: the end part of the through hole (22) adjacent to the first formwork (11) forms a convex ring (23), and the die sleeve (24) further comprises a clamping step (242) which is formed on the sleeve body (241) and matched with the convex ring (23).