CN112439862A

CN112439862A - Forming method of reducing sleeve

Info

Publication number: CN112439862A
Application number: CN202011612915.XA
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 method for forming a reducing sleeve, which comprises the working procedures of shaping and edge bundling, square hole pressing, hexagonal hole pressing, tooth punching and typing and the like.

Description

Forming method of reducing sleeve

Technical Field

The invention relates to the field of production of mechanical parts by adopting a cold extrusion molding process, in particular to a method for molding a reducing sleeve.

Background

The reducing sleeve is a common tool, at present, the reducing sleeve is manufactured by generally adopting a turning and planing milling mode or a pouring molding mode, the profile is low in density in the pouring molding mode, the whole quality is poor, the turning and planing milling mode is adopted, the process is multiple, especially, the machining difficulty of a square hole and a hexagonal hole is large, the efficiency is low, the hole wall is rough, the product quality cannot be guaranteed, therefore, the shearing weight is greatly increased after the forming by using the traditional machining means, the raw material waste is great, and the cost is high.

Disclosure of Invention

In order to solve the problems, the invention provides a method for forming a reducing sleeve, 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 method for forming a reducing sleeve comprises the step of cutting materials to form a reducing sleeve material part, and after the materials are cut, the following cold extrusion treatment is carried out:

A. shaping and edge-binding two ends of the material part to form chamfers at the two ends,

B. one end of the material part is contracted twice or three times to form a contracted rod part, an arc transition part is formed between the contracted rod part and the non-contracted rod part,

C. a hexagonal hole positioning hole is pressed on the end surface of one end of the non-shrinkage part, a square hole positioning hole is pressed on the end surface of one end of the shrinkage part,

D. a hexagonal hole is pressed on the basis of the hexagonal hole positioning hole,

E. square holes are pressed out on the basis of the square hole positioning holes,

F. the surface of the non-shrinkage rod part of the material part is toothed to form a tooth part, the tooth part is close to the end of the shrinkage rod part,

G. the square hole and the hexagonal hole are communicated with each other through the through hole,

H. and typing is carried out on the surface of the non-rod-contracting part of the material piece away from the rod-contracting part end.

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 relates to a reducing sleeve, which aims at the problem that the design and process arrangement of stations of the reducing sleeve are one of the key points of cold extrusion. In addition, the cold extrusion causes the metal material to generate plastic deformation, so that the internal structure of the metal is changed, the tension is improved, the mechanical properties of the hole shrinkage wall and the whole body are improved, the product quality is ensured, and the product has more advantages in 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 a 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, the upward direction can be understood as the forward direction, and referring to fig. 1, the specific process after material breakage is as follows:

1. cold extruding the material piece, shaping and trimming the front end and the rear end of the material piece to ensure that the periphery of the material piece 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 piece during the next step of cold extrusion, improve the cold extrusion quality and reduce the die loss;

2. cold extruding the material piece, performing two or three times of shrinkage on the rear part of the material piece to form a shrinkage rod part 3, and forming an arc transition part 5 between the shrinkage rod part 3 and a non-shrinkage rod part 4;

3. a hexagonal hole positioning hole 2 is formed in the end face of one end of the non-shrinkage part 4, and a square hole positioning hole 21 is formed in the end face of one end of the shrinkage part 3;

4. cold extruding the material part, and extruding a hexagonal hole 7 on the basis of the hexagonal hole positioning hole 2;

5. cold extruding the material part, and extruding a square hole 8 on the basis of the square hole positioning hole 21;

6. and (3) cold extruding the material piece, and performing tooth punching 9 on the surface of the non-shrinkage rod part 4 of the material piece to form a tooth part, wherein the tooth part is close to the end of the shrinkage rod part 3.

7. And (3) cold extruding the material piece, and communicating the square hole 8 with the hexagonal hole 7 through the through hole 11.

8. And (3) cold extruding the material piece, and typing 10 on the surface of the non-reduced rod part 4 of the material piece far away from the reduced rod part 3.

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

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 reducing sleeve is characterized by comprising the step of cutting materials to form a reducing sleeve material part, and after the materials are cut, the following cold extrusion treatment is carried out:

A. shaping and edge-binding two ends of the material part to form chamfers (1) at the two ends,

B. one end of the material part is contracted twice or three times to form a contracted rod part (3), an arc transition part (5) is formed between the contracted rod part (3) and the non-contracted rod part (4),

C. a hexagonal hole positioning hole (2) is pressed on the end surface of one end of the non-shrinking rod part (4), a square hole positioning hole (21) is pressed on the end surface of one end of the shrinking rod part (3),

D. a hexagonal hole (7) is pressed on the basis of the hexagonal hole positioning hole (2),

E. a square hole (8) is pressed out on the basis of the square hole positioning hole (21),

F. teeth (9) are formed on the surface of the non-shrinkage rod part (4) of the material part to form a tooth part, the tooth part is close to the end of the shrinkage rod part (3),

G. the square hole (8) and the hexagonal hole (7) are communicated through a through hole (11),

typing (10) is carried out on the surface of the shrinking rod part (3) of the material piece.