CN112045370A

CN112045370A - Machining process of square driving sleeve

Info

Publication number: CN112045370A
Application number: CN202010893315.9A
Authority: CN
Inventors: 谢向君; 伍铁忠
Original assignee: Shanghai Hongji Metal Products Co ltd
Current assignee: Shanghai Hongji Metal Products Co ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2020-12-08

Abstract

The square driving sleeve machining process is characterized by comprising the steps of shearing a blank by a cold header, bundling into a square shape, performing the head, chamfering the tail of a square rod, forming an eccentric cylinder at the head, forming a positioning hole at the head of the square rod, stretching an inner hole of the square rod, passing through an iron core and cutting the head diameter. The product is finished through cold heading, the product is formed on a six-station cold heading forming machine, the utilization rate of raw materials reaches over 88 percent, the production efficiency is high, the production cost is low, and the production requirement of mass products can be met.

Description

Machining process of square driving sleeve

Technical Field

The invention belongs to the technical field of hardware part machining, and particularly relates to a machining process of a square driving sleeve.

Background

Various hardware parts are generally used in the mechanical industry for machining and mounting, for example, a fastener is a common hardware part and is a general name of a type of mechanical parts used when two or more parts or components are fastened and connected into a whole, and a square driving sleeve is a non-standard fastener.

Traditionally, the square sleeve that drives accomplishes processes such as outside profile size, bore hole, compound die on cold-heading, drilling machine, punching press compound die, and material utilization is low, and low to 35 ~ 38%, the size is unstable, and the defective rate is high, can't satisfy mass production's demand.

Disclosure of Invention

The invention aims to overcome the technical defects of low raw material utilization rate, unstable size, high reject ratio and low production efficiency of the conventional square driving sleeve processing technology, and provides the square driving sleeve processing technology which completes a product through cold heading and forms the product on a six-station cold heading forming machine, wherein the raw material utilization rate is up to over 88 percent, the production efficiency is high, the production cost is low, and the production requirement of mass products can be met.

Technical scheme

In order to achieve the technical purpose, the invention provides a processing technology of a square driving sleeve, which is characterized by comprising the following steps:

(1) shearing a blank by a cold header;

(2) bundling into square shape;

(3) the head is preformed and the tail of the square rod is chamfered;

(4) the head part is formed into an eccentric cylinder, the head is thick, and the tail part of the square rod is formed into a positioning hole;

(5) stretching the inner hole of the square rod;

(6) passing through the iron core;

(7) and (5) cutting the edge of the head.

And (2) driving a shearing die through the material blocking and shearing connecting rod in the step (1), so that the material is subjected to plastic shearing deformation, and the continuous cold heading wires are cut off one by one.

Further, in the step (2), the blank is fed into the die orifice through a machine feeding device, the blank is extruded in the operation process of the die, and the beam squareness is completed in the die cavity.

Further, in the step (3), the module of the former die is fed into the die opening through a machine feeding device, and the head pre-forming and the tail chamfering of the square rod are extruded in the operation process of the punching die.

Further, in the step (4), the module of the former die is fed into the die opening through the machine feeding device, and the head part of the punch die is extruded to form the eccentric cylinder, the head part of the punch die is thick, and the tail part of the square rod is formed into the positioning hole.

Further, in the step (5), the module of the former die is fed into the die orifice through a machine feeding device, and the square inner hole is movably drawn through the main die in the extrusion process of the punching die.

Further, in the step (6), the module of the former die is fed into the die orifice through the machine feeding device, and the iron core is movably led out through the main die in the process of the operation of the punching die.

Further, in the step (7), the module of the former die is fed into the die orifice through a machine feeding device, and the diameter of the die head is cut during the operation process of the punching die.

Advantageous effects

Compared with the prior art, the processing technology of the square driving sleeve provided by the invention has the following advantages:

1. the production efficiency is high. The cold heading multi-station automatic forming machine has the capacity of 100-120 pcs/min.

2. High utilization rate of raw materials and low cost. The cold heading has less waste material, high material utilization rate up to 85% and low material cost.

3. And the mechanical property is good. Because the metal fiber of the blank is not cut off in the forming process, relatively strong mechanical property can be ensured

4. The production cost is low. Because the cold heading is directly formed, the multi-channel machining time and the expense of high machining equipment are saved, and the production cost is obviously reduced.

Drawings

FIG. 1 is a schematic illustration of a cold-headed sheared blank according to an embodiment of the present invention.

FIG. 2 is a schematic view of an embodiment of the present invention showing a blank completing a bundle square within a die cavity.

FIG. 3 is a schematic diagram of head preforming and square bar tail chamfering according to an embodiment of the present invention.

FIG. 4 is a schematic view of a positioning hole for forming an eccentric cylinder, a thick head, and a square rod at the tail of the head according to the embodiment of the present invention.

FIG. 5 is a schematic view of an embodiment of the present invention for actively drawing a square inner hole through a master mold.

Fig. 6 is a schematic diagram of the core being moved through the master mold according to the embodiment of the present invention.

FIG. 7 is a schematic view of a trimming die head diameter of an embodiment of the present invention.

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.

Examples

As shown in the attached drawings 1-7, the processing technology of the square driving sleeve provided by the invention comprises the following steps:

step one, shearing a blank by a cold header: the material blocking and shearing connecting rod drives the shearing die to enable the material to generate plastic shearing deformation, and continuous cold heading wires are cut off one by one.

Secondly, bundling square: the blank is fed into the die orifice through the machine feeding device, the blank is extruded in the operation process of the punching die, and the beam squareness is completed in the die cavity.

Thirdly, performing the head part and chamfering the tail part of the square rod: the module of the former die is fed into the die orifice through a machine feeding device, and the head preforming and the tail chamfering of the square rod are extruded in the operation process of the punching die.

Step four, forming the eccentric cylinder at the head part, forming the positioning hole at the head part and forming the tail part of the square rod: the module of the former die is fed into the die orifice through the machine feeding device, and the head part is extruded in the operation process of the punching die to form the eccentric cylinder, the head part is thick, and the tail part of the square rod is formed into the positioning hole.

Step five, stretching the inner hole of the square rod: the die piece of the former die is fed into the die opening through the machine feeding device, and the square inner hole is movably drawn through the main die in the extrusion process of the punching die.

Sixthly, iron core connection: the die piece of the former die is fed into the die opening through the machine feeding device, and the iron core is movably led out through the main die in the extrusion process of the punching die.

Step seven, trimming the head diameter: the module of the former die is fed into the die orifice through a machine feeding device, and the diameter of the die head is cut during the operation process of the punching die.

Compared with the prior art, the processing technology of the square driving sleeve provided by the embodiment has the following advantages:

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A processing technology of a square driving sleeve is characterized by comprising the following steps:

(1) shearing a blank by a cold header;

(2) bundling into square shape;

(3) the head is preformed and the tail of the square rod is chamfered;

(5) stretching the inner hole of the square rod;

(6) passing through the iron core;

(7) and (5) cutting the edge of the head.

2. The machining process of the square driving sleeve according to claim 1, wherein the machining process comprises the following steps: and (1) driving a shearing die through the material blocking and shearing connecting rod to enable the material to generate plastic shearing deformation, and cutting off continuous cold heading wires one by one.

3. The machining process of the square driving sleeve according to claim 1, wherein the machining process comprises the following steps: and (3) in the step (2), the blank is fed into the die orifice through the machine feeding device, the blank is extruded in the operation process of the die, and the beam squareness is completed in the die cavity.

4. The machining process of the square driving sleeve according to claim 1, wherein the machining process comprises the following steps: and (4) feeding the module of the former die into the die opening through a machine feeding device in the step (3), and extruding the head pre-forming and chamfering the tail part of the square rod in the operation process of the punching die.

5. The machining process of the square driving sleeve according to claim 1, wherein the machining process comprises the following steps: and (4) feeding the module of the former die into the die opening through the machine feeding device, and extruding the head part to form the eccentric cylinder, the head thickness and the square rod tail part forming positioning hole in the operation process of the punching die.

6. The machining process of the square driving sleeve according to claim 1, wherein the machining process comprises the following steps: and (5) feeding the module of the former die into the die opening through a machine feeding device, and extruding the die in the operation process to movably stretch the square inner hole through the main die.

7. The machining process of the square driving sleeve according to claim 1, wherein the machining process comprises the following steps: and (4) in the step (6), the module of the previous die is fed into the die opening through the machine table feeding device, and the iron core is movably led out through the main die in the extrusion process of the punching die.

8. The machining process of the square driving sleeve according to claim 1, wherein the machining process comprises the following steps: and (4) feeding the module of the former die into the die opening through a machine feeding device in the step (7), and trimming the die head diameter in the operation process of the stamping die.