CN218134727U

CN218134727U - Cold heading forming die assembly for cross-shaped thread insert bolt

Info

Publication number: CN218134727U
Application number: CN202221982204.6U
Authority: CN
Inventors: 喻林; 欧阳明
Original assignee: SHANGHAI SQB AUTOMOTIVE FASTENERS Ltd
Current assignee: SHANGHAI SQB AUTOMOTIVE FASTENERS Ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2022-12-27
Anticipated expiration: 2032-07-29

Abstract

The utility model relates to a cold heading forming die subassembly of cross thread inserts bolt, including die subassembly and master die subassembly, the die subassembly includes first die, second die and third die, is equipped with first drift, second drift and third drift on the terminal surface of first die, second die and third die in proper order; the front end surfaces of the first punch, the second punch and the third punch are cylindrical; the fundamental mode subassembly includes first fundamental mode, second fundamental mode and third fundamental mode, is equipped with first towards the chamber in first fundamental mode, second fundamental mode and the third fundamental mode respectively, and the second is towards the chamber and the third is towards the chamber, the utility model discloses a cold extrusion one shot forming technique improves production efficiency to and reduce most extravagant.

Description

Cold heading forming die assembly for cross-shaped thread insert bolt

Technical Field

The utility model relates to a manufacturing technical field of passenger car part, specific cold-heading forming die subassembly of cross thread inserts bolt that says so.

Background

The cross-shaped thread insert product for the passenger car is generally finished by adopting technological methods such as lathe and punch stamping and the like for special-shaped head parts, the technological die has a simple structure, but the technological process is long, and the efficiency is low and the material utilization rate is low because the machining is still needed. Since the way of processing the head part with the opposite head part is more and more laggard, a new processing technology is urgently needed to be applied, and the forming of the head part with the opposite head part is completed through a cold forming technology.

Disclosure of Invention

The utility model aims at overcoming prior art's defect, provide a cold-heading forming die subassembly of cross thread inserts bolt, through cold extrusion one shot forming technique, improve production efficiency to and reduce most extravagant.

In order to solve the technical problem, the utility model discloses a realize like this:

the utility model provides a cold-heading forming die subassembly of cross flower screw insert bolt, includes die assembly and master die assembly, its characterized in that:

the die assembly comprises a first die, a second die and a third die, and a first punch, a second punch and a third punch are sequentially arranged on the end surfaces of the first die, the second die and the third die; the front end surfaces of the first punch, the second punch and the third punch are cylindrical;

the main die assembly comprises a first main die, a second main die and a third main die, wherein a first punching cavity, a second punching cavity and a third punching cavity are respectively arranged in the first main die, the second main die and the third main die, and the open ends of the first punching cavity, the second punching cavity and the third punching cavity are respectively arranged on the front end faces of the first main die, the second main die and the third main die;

the first punching cavity is a stepped hole with the size of the secondary outer diameter gradually shrinking from large to small along the front end surface to the bottom end surface, the stepped hole is a cylindrical front end hole and a cylindrical bottom end hole from the front end surface to the bottom end surface, and the front end hole and the bottom end hole are in transition through an inclined surface;

the shape of the second punching cavity is a stepped hole with the size of the secondary outer diameter gradually shrinking from large to small along the front end surface to the bottom end surface, the stepped hole is a cylindrical front end hole and a cylindrical bottom end hole from the front end surface to the bottom end surface, and the front end surface, the bottom end surface and the side wall are in transition through inclined planes;

the third punching cavity is a stepped hole with four levels of outer diameters shrinking from large to small in sequence from the front end face to the bottom end face, the stepped hole is a cross-shaped front end hole, a circular middle end hole and a circular bottom end hole from the front end face to the bottom end face, and the circular middle end hole and the circular bottom end hole are in transition through an inclined plane.

The cold heading forming die assembly of the cross-shaped threaded insert bolt is characterized in that: ejector pins are arranged in the first punching cavity and the third punching cavity.

The beneficial effects of the utility model are that: by adopting the one-step cold forming extrusion technology, the machining process can be reduced by 100 percent, and the product is formed by using the material with the weight close to that of the finished product, no waste is generated in the cold heading process, and the material utilization rate can be improved by 90 percent. The multi-station cold heading machine is used for manufacturing, the cold heading process can reach more than 70 pieces/minute, the processing speed is improved, the production efficiency is high, and the mechanical property of the product is stable.

The 10B21 alloy steel material is adopted, the design requirement is completely met, the strength grade of the mechanical property reaches 8.8 grades, and the requirement of the friction coefficient of screwing during assembly is met.

Drawings

The invention will be described in further detail with reference to the following drawings and embodiments:

fig. 1 is a schematic diagram of a product of the material shearing, the first process and the third process.

Fig. 2 is a schematic structural view of the first to third steps.

Detailed Description

As shown in fig. 1 and 2: a cold heading forming die component of a cross-shaped thread insert bolt comprises a punch die component and a main die component,

the die assembly comprises a first die 1, a second die 2 and a third die 3, wherein a first punch 11, a second punch 12 and a third punch 13 are sequentially arranged on the end surfaces of the first die, the second die and the third die; the front end surfaces of the first punch, the second punch and the third punch are cylindrical;

the main die assembly comprises a first main die 21, a second main die 22 and a third main die 23, wherein a first punching cavity 31, a second punching cavity 32 and a third punching cavity 33 are respectively arranged in the first main die, the second main die and the third main die, and the open ends of the first punching cavity, the second punching cavity and the third punching cavity are respectively arranged on the front end surfaces of the first main die, the second main die and the third main die;

the first punching cavity is a stepped hole with the secondary outer diameter size gradually shrinking from large to small along the front end surface to the bottom end surface, the stepped hole is respectively a cylindrical front end hole and a cylindrical bottom end hole from the front end surface to the bottom end surface, and the front end hole and the bottom end hole are in transition through an inclined surface;

the third punching cavity is a stepped hole with four stages of outer diameters sequentially shrinking from large to small along the front end face to the bottom end face, the stepped hole is a cross-shaped front end hole, a circular middle end hole and a circular bottom end hole from the front end face to the bottom end face, and the circular middle end hole and the circular bottom end hole are in transition through an inclined plane.

The cold heading forming die assembly of the cross-shaped thread insert bolt comprises a die assembly and a main die assembly, and is characterized in that: the first punching cavity, the second punching cavity and the third punching cavity are internally provided with ejector pins 4.

The die assembly adopts the design, the blank is gradually deformed and finally formed by the multi-process cold heading method, and the blank is not cut in the process, so that the raw materials can be greatly saved, the manufacturing cost is reduced, and meanwhile, the manufacturing precision of the product can be realized and the mechanical property of the part can be ensured by the cold extrusion forming process.

Claims

1. The utility model provides a cold-heading forming die subassembly of cross flower screw insert bolt, includes die assembly and master die assembly, its characterized in that:

2. The cold-heading forming die assembly for a cross-threaded insert bolt as claimed in claim 1, wherein: ejector pins are arranged in the first punching cavity and the third punching cavity.