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Preparing method for automobile chain wheel

A technology for sprockets and automobiles, which is applied in the field of preparation of automobile sprockets, can solve the problems of too simple structure, cannot be prepared, and have large structural differences, and achieve the effects of improving hardness, avoiding wear, and simple equipment.

Inactive Publication Date: 2017-02-08
QIJING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The above-mentioned tooth parts have successively adopted extrusion to form product shapes and tooth shapes other than the tooth shape, which has greatly improved production efficiency. However, the structure of the above-mentioned tooth parts is too simple. figure 1 , 2 The structure of the automobile sprocket shown in belongs to different application fields, and the structure is quite different, so it cannot be prepared figure 1 , 2 The car sprocket structure shown in

Method used

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  • Preparing method for automobile chain wheel
  • Preparing method for automobile chain wheel
  • Preparing method for automobile chain wheel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The preparation method of automobile sprocket in the present embodiment comprises the following steps:

[0059] (1) Blanking: Cut the 20CrMo round steel of φ45 into a billet of required length with a high-speed circular sawing machine, leaving margins on both sides of the billet;

[0060] (2) Annealing and shot blasting: First, the billet is subjected to stepwise annealing treatment, and the specific process of the annealing treatment process is as follows:

[0061] First raise the temperature to 200°C with the furnace, and keep it warm for 2.2 hours;

[0062] Then heat up to 600°C with the furnace and keep warm for 1.2 hours;

[0063] Then heat up to 780°C with the furnace and keep warm for 8.2 hours;

[0064] Cool down to 680°C with the furnace and keep warm for 8.2 hours;

[0065] Then lower the temperature to 450°C and below, and take it out of the furnace; in the cooling process, first cool down with the furnace, and when the temperature drops to 550°C, turn on ...

Embodiment 2

[0099] The preparation method of automobile sprocket in the present embodiment comprises the following steps:

[0100] (1) Blanking: Cut the 20CrMo round steel of φ46 into the billet of required length with a high-speed circular sawing machine, leaving margin on both sides of the billet;

[0101] (2) Annealing and shot blasting: First, the billet is subjected to stepwise annealing treatment, and the specific process of the annealing treatment process is as follows:

[0102] First raise the temperature to 210°C with the furnace, and keep it warm for 1.8 hours;

[0103] Then heat up to 610°C with the furnace and keep warm for 0.8 hours;

[0104] Then heat up to 790°C with the furnace and keep warm for 7.8 hours;

[0105] Cool down to 690°C with the furnace and keep warm for 7.8 hours;

[0106] Then lower the temperature to 450°C and below, and take it out of the furnace; in the cooling process, first cool down with the furnace, and when the temperature drops to 550°C, turn on...

Embodiment 3

[0141] The preparation method of automobile sprocket in the present embodiment comprises the following steps:

[0142] (1) Blanking: Cut the 20CrMo round steel of φ40 into a billet of required length with a high-speed circular sawing machine, leaving margins on both sides of the billet;

[0143] (2) Annealing and shot blasting: First, the billet is subjected to stepwise annealing treatment, and the specific process of the annealing treatment process is as follows:

[0144] First raise the temperature to 200°C with the furnace, and keep it warm for 2 hours;

[0145] Then heat up to 600°C with the furnace and keep warm for 1 hour;

[0146] Then heat up to 780°C with the furnace and keep warm for 8 hours;

[0147] Cool down to 680°C with the furnace and keep warm for 8 hours;

[0148] Then lower the temperature to 450°C and below, and take it out of the furnace; in the cooling process, first cool down with the furnace, and when the temperature drops to 550°C, turn on the blowe...

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Abstract

The invention relates to a preparing method for an automobile chain wheel. According to the method, round steel or a hollow pipe material is subjected to a series of treatment such as annealing, shot blasting and saponification of phosphorus, the performance of a blank can be primarily improved through annealing and shot blasting, after an inner layer protection film and an outer layer lubricating film are formed on the surface of the blank through saponification of phosphorus, cold extrusion is conducted, and the problems of blank surface cracking and the like in the cold extrusion process can be solved. After the component appearance meeting the requirement is obtained through the procedures of extrusion, inner hole turning, groove cutting, positioning structure machining and the like, a component is subjected to carburizing and quenching and tempering treatment, the hardness of a workpiece is further improved, and the metallographic structure of the workpiece can meet the QC / T262-1999 requirement. A gear part structure is directly machined in the cold extrusion process. Compared with the prior art, adopted equipment is relatively simple, and the production efficiency is effectively improved. Due to the fact that the hardness of the workpiece is improved step by step in the whole component preparing process, the abrasion of a tool is effectively avoided, and the production cost is reduced.

Description

technical field [0001] The invention relates to a method for preparing an automobile sprocket. Background technique [0002] figure 1 , 2 , 8 show a kind of automobile sprocket structure, in the prior art, when producing this type of automobile sprocket, generally the round steel after hardening treatment is cut, and the required gear is cut out on the round steel and other parts. However, such a production method needs to be equipped with relatively large and complex equipment, and the wear on the tool is also relatively large, resulting in high production costs; and the production efficiency of the cutting method is extremely low. Generally, one machine can only complete 50 pieces a day. Left and right finished products. [0003] The Chinese invention patent application "A Method for Precise Cold Extrusion Forming of Small Blind Gear Parts" (Application No.: CN201210329047.3) with application publication number CN103659166A discloses a preparation process of tooth part...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/14
CPCB23P15/14
Inventor 汪伟东冯海明张俊忠钟鸣
Owner QIJING MACHINERY
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