CN112439866A

CN112439866A - Forming method of open spanner head

Info

Publication number: CN112439866A
Application number: CN202011634229.2A
Authority: CN
Inventors: 陈杨忠
Original assignee: Jinhua Zhongxin Hardware Tools Co ltd
Current assignee: Jinhua Zhongxin Hardware Tools Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-03-05

Abstract

The invention discloses a forming method of an open spanner head, which comprises the working procedures of shaping, edge bundling, flattening, blind groove punching, opening and the like.

Description

Forming method of open spanner head

Technical Field

The invention relates to the field of production of mechanical parts by adopting a cold extrusion molding process, in particular to a molding method of an open spanner head.

Background

The open spanner head is a common tool, at present, the open spanner head is manufactured by generally adopting a turning and planing milling mode or a pouring molding mode, the profile is low in density and poor in overall quality in the pouring molding mode, the turning and planing milling mode is adopted, the process is multiple, particularly, the cutting of the side face and the processing of an opening structure are troublesome, the efficiency is low, the raw material waste is great by using the traditional turning and planing milling processing means, and the cost is high.

Disclosure of Invention

In order to solve the problems, the invention provides a method for forming the open spanner head, which can save raw materials, reduce the production cost and improve the product quality.

The technical scheme adopted by the invention is as follows: a forming method of an open spanner head comprises the step of cutting materials to form an open spanner head material part, and after the materials are cut, the following cold extrusion treatment is carried out:

A. one end of the material piece is shaped and erected to form a chamfer at the end part,

B. two or three times of reducing rods are carried out on the chamfer end of the material part to form a reducing rod part, the part between the reducing rod part and the non-reducing rod part is reduced to form an arc part,

C. reducing the diameter of the end part of the non-reduced rod part of the material part to form a round head,

D. flattening the material part to form a round head part and a rod part,

E. flattening the middle part of the end face of the round head part to form a blind groove, flattening the rod part simultaneously, wherein the thickness of the rod part is smaller than that of the round head part, the side face of one side of the rod part and the side face of the round head part are positioned on the same plane, and the side face of the other side of the rod part is lower than that of the round head part on the other side

F. Cutting off the bottom of the blind groove to form an opening part,

G. the material piece is flattened for the second time, the thickness of the rod part is formed to be smaller than that of the round head part,

H. and typing on the end face of the rod part of the material part.

Compared with the prior art, the invention has the following beneficial effects:

cold extrusion is a plastic working process, which plastically transfers the volume of metal without destroying the property of the metal, so as to form the metal with less cutting and no cutting. Thus, a large amount of metal scraps are avoided during cutting and processing, and a large amount of steel and various metal materials are saved.

The invention reasonably outlines the working procedures of the working positions so that the open spanner can be manufactured by adopting a cold extrusion method, has high speed, high precision and high production efficiency, does not adopt traditional processes such as turning, planing, milling and the like, greatly saves raw materials and reduces the production cost. And cold extrusion makes metal material produce plastic deformation, makes metal internal structure change, has improved more in the aspect of the pulling force, and the round head portion that forms, rod portion structure and open structure's mechanical properties are very good, have guaranteed product quality, make the product have more advantage on the use function.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a process diagram of the present invention.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The method comprises the step of cutting the material to form a cold extrusion material part, wherein the used raw material is a steel section with a circular section. After the material is broken, it is cold extruded according to the process of the invention. For the material piece, the upper end surface is a front end surface, the lower end surface is a rear end surface, the upper end of the material piece is the front end or the head of the material piece, the lower end of the material piece is the rear end or the tail of the material piece, the downward direction can be understood as the backward direction, and the upward direction can be understood as the forward direction; referring to fig. 1, the specific process after material breaking is as follows:

shaping and edge-binding, namely shaping and edge-binding the rear end of the material part to ensure that the periphery of the material part is smooth and mellow, and forming a chamfer 1 with a certain inclination or radian so as to help the positioning of a die and the material part during the next step of cold extrusion, improve the cold extrusion quality and reduce the die loss;

reducing the diameter, namely performing two or three times of reducing on the chamfer 1 end of the material part to form a reducing rod part 3, and reducing the diameter of the part between the reducing rod part 3 and a non-reducing rod part 4 to form an arc part 5;

reducing the round head, namely reducing the end part of the non-reduced rod part of the material part to form a round head 2;

flattening, flattening the material part to form a round head part 6 and a rod part 7, wherein the diameter of the round head part 6 is larger than the width of the rod part 7;

flattening for the second time, flattening the middle part of the end face of the round head part 6 to form a blind groove 8, flattening the rod part 7 at the same time, and forming that the thickness of the rod part 7 is smaller than that of the round head part 6, wherein the side surface of one side of the rod part 7 and the side surface of the round head part 6 are positioned on the same plane, and the side surface of the other side is lower than that of the round head part 6 on the other side;

opening, cutting off the bottom of the blind groove 8 to form an opening part 9; since the opening portion of the opening 9 is formed by flattening the bar, the strength of the side wall of the opening 9 and the strength of each portion of the opening are excellent.

And (9) typing, namely typing 9 on the end face of the rod part of the material part.

The invention is provided with a plurality of processes, and each process is completed on one station, thereby realizing one-time molding, namely, cold extrusion dies required by each process are arranged on one machine at one time, and the material is conveyed to the dies on each process at one time through a conveying tool for cold extrusion.

In the above-mentioned process, form round head and pole portion through what flatten, its density is made higher than traditional form of pouring or cutting, and mechanical properties is better, and intensity is stronger.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The forming method of the open spanner head is characterized by comprising the step of cutting materials to form a material part of the open spanner head, wherein the following cold extrusion treatment is carried out after the materials are cut:

A. one end of the material piece is shaped and erected to form a chamfer (1) at the end part,

B. two or three times of shrinkage are carried out on the chamfer (1) end of the material part to form a shrinkage rod part (3), the part between the shrinkage rod part (3) and the non-shrinkage rod part (4) is shrunk to form an arc part (5),

C. reducing the diameter of the end part of the non-reduced rod part (4) of the material part to form a round head (2),

D. flattening the material to form a round head part (6) and a rod part (7),

E. flattening the middle part of the end face of the round head part (6) to form a blind groove (8), flattening the rod part (7) at the same time, forming that the thickness of the rod part (7) is smaller than that of the round head part (6), wherein the side surface of one side of the rod part (7) and the side surface of the round head part (6) are positioned on the same plane, and the side surface of the other side is lower than that of the round head part (6) on the other side;

F. the bottom of the blind groove (8) is cut off to form an opening part (9),

G. the material piece is flattened for the second time, the thickness of the rod part is formed to be smaller than that of the round head part (6),

typing (10) is carried out on the end face of the rod part of the material part.