CN112475206A

CN112475206A - Forming method of hexagonal screwdriver bit sleeve

Info

Publication number: CN112475206A
Application number: CN202011255848.0A
Authority: CN
Inventors: 陈杨忠
Original assignee: Jinhua Zhongxin Hardware Tools Co ltd
Current assignee: Jinhua Zhongxin Hardware Tools Co ltd
Priority date: 2020-11-11
Filing date: 2020-11-11
Publication date: 2021-03-12

Abstract

The invention discloses a method for forming a hexagonal screwdriver bit sleeve, which comprises the working procedures of shaping and edge bundling, square hole pressing, hexagonal rod shrinking and the like.

Description

Forming method of hexagonal screwdriver bit sleeve

Technical Field

The invention relates to a processing technology of a hexagonal screwdriver bit sleeve.

Background

The hexagonal screwdriver bit sleeve is a common tool and is formed by a sleeve section and a hexagonal rod section. At present, the mode that the first sleeve of hexagonal screwdriver wholesale generally adopts the turning to add to dig and mill or the fashioned mode of pouring is made, the mode section bar density that adopts the shaping of pouring is little, whole quality is poor, the mode process that adopts the turning to add to dig and mill is numerous, especially the processing degree of difficulty of square hole and hexagonal pole is big, inefficiency, the pore wall is relatively rough, product quality can't guarantee, consequently, can cause with traditional means of processing to cut material weight and be greater than shaping back product weight, raw and other materials waste greatly, the cost is higher.

Disclosure of Invention

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

A. the two ends of the material piece are shaped and erected to form chamfers at the two ends,

B. the end surface of the square hole to be pressed faces the front, two or three shrinkage rods are carried out on the rear part of the material piece to form a shrinkage rod part, an arc transition part is formed between the shrinkage rod part and the non-shrinkage rod part,

C. upsetting the non-shrinkage rod part of the material part to make the diameter of the non-shrinkage rod part at least 2mm larger than the aperture of a square hole to be dug, prolonging the length of the shrinkage rod part of the material part,

D. pressing a positioning hole on the end face of the square hole,

E. on the basis of pressing the positioning hole on the end face of the square hole, the square hole is pressed, the non-shrinkage rod part of the material part is prolonged to deepen the hole depth of the square hole,

F. multiple shrinkage rods are carried out on the shrinkage rod part of the material part to form a screw head with a regular hexagon section,

G. the surface of the non-shrinkage rod part of the material piece is toothed close to the end of the shrinkage rod,

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 aims at the problem that the design and process arrangement of the station of a target product are one of the key points of cold extrusion, and the invention reasonably outlines the station process, so that the sleeve can be manufactured by adopting a cold extrusion method, has high speed, high precision and high production efficiency, can not adopt or adopt few turning and drilling holes, has the material shearing weight almost equal to the weight of a formed product, has less waste materials or even no waste materials, 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, has improved the mechanical properties of product, has ensured product quality, makes the product have more the 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.

Referring to fig. 1, the present invention includes the step of breaking the material to form a cold extruded material, which is a steel profile having a circular cross-section. After the material is broken, the material is subjected to cold extrusion according to the following station sequence, in the figures and the specific description, for the material, the upper end surface is a front end surface, the lower end surface is a rear end surface, the upper end of the material is the front end or the head of the material, the lower end of the material is the rear end or the tail of the material, the downward direction can be understood as the backward direction, and the upward direction can be understood as the forward direction:

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. cold extruding the material part, upsetting a non-shrinkage-rod part 4 of the material part to make the diameter of the non-shrinkage-rod part 2mm larger than the aperture of a square hole to be dug, prolonging the length of a shrinkage-rod part 3 of the material part, and extruding a positioning hole 6 on the end surface of the square hole to be pressed;

4. cold extruding the material piece, namely extruding a square hole 7 on the basis of pressing a positioning hole 6 on the end face of the square hole, and prolonging the non-shrinkage rod part 4 of the material piece to deepen the hole depth of the square hole 7;

5. cold extruding the material piece, rotating two legs to position the extruded square holes, performing three or four rod reducing processes on the rod reducing part of the material piece to form a screw head 8 with a regular hexagon section, and extending the length of the screw head 8;

6. cold extruding the material piece, shaping the space between the section 8 of the screw head and the arc transition part 5 to form a transition part 2, and removing burrs; the transition 2 comprises an annular chamfer 21 between the segment of the screw head 8 and the circular-arc transition 5, and an edge transition 22 formed by each side of the screw head 8 and the circular-arc transition 5.

7. And (3) cold extruding the material piece, and performing tooth punching 9 on the surface of the non-reduced rod part 4 of the material piece close to the end of the reduced rod part 3.

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 method for forming the hexagonal screwdriver bit sleeve is characterized by comprising the step of cutting materials to form a hexagonal screwdriver bit sleeve material part, wherein the following cold extrusion treatment is carried out after the materials are cut:

A. the two ends of the material part are shaped and erected to form chamfers (1),

B. the end surface of the square hole to be pressed faces the front, two or three shrinkage rods are carried out on the rear part of the material piece to form a shrinkage rod part (3), an arc transition part (5) is formed between the shrinkage rod part (3) and a non-shrinkage rod part (4),

C. upsetting the non-reduced rod part (4) of the material part to make the diameter of the non-reduced rod part at least larger than the aperture of a square hole to be dug by 2mm, and prolonging the length of the reduced rod part (3) of the material part,

D. a positioning hole (6) is pressed out of the end face of the square hole to be pressed,

E. on the basis of pressing a positioning hole (6) on the end face of the square hole, the square hole (7) is pressed, the non-shrinking rod part (4) of the material part is extended to deepen the hole depth of the square hole (7),

F. a plurality of rod shrinkage parts (3) of the material part are subjected to rod shrinkage to form a screw head (8) with a regular hexagon section,

G. the surface of the non-shrinking rod part (4) of the material part is close to the shrinking rod part (3) to be toothed (9),

typing (10) is carried out on the surface of the non-shrinking rod part (4) of the material part far away from the shrinking rod part (3).