Extrusion processing method for external star wheel

A technology of extrusion processing and outer star wheel, which is applied in the field of metal processing, can solve the problems of difficult control of precision size, poor distribution of metal flow lines, low material utilization rate, etc., and achieve high anti-fatigue and breaking capacity, good compression internal stress , The effect of reducing material consumption

Inactive Publication Date: 2015-03-11
SICHUAN HUAQING MACHINERY
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  • Abstract
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AI Technical Summary

Problems solved by technology

The traditional processing method in our country adopts the cutting processing method, which not only has a very low material utilization rate (less than 40% on average), but also consumes a lot of man-hours and high production costs.
[0003] In plastic processing, for parts with concave, multiple grooves and complex shapes like the outer star wheel, ordinary forging processing is difficult to achieve the ideal shape, and the distribution of metal streamlines is poor; the precision size is more difficult to control, processing Large margin, high manufacturing cost

Method used

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  • Extrusion processing method for external star wheel

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Embodiment Construction

[0026] The processing steps of the invention are: blanking-heating-upsetting-warm extrusion-annealing-shot blasting-phosphating-saponification-cold extrusion-inspection.

[0027] Cutting according to the size of the part;

[0028] Start the intermediate frequency heating furnace; adjust the parameters of the intermediate frequency furnace: power (15-80KW), DC voltage (380-500V), DC current (100-200A);

[0029] Put 10 pieces of billets into the furnace first, heat for 80-150 seconds, push out the billets with the pusher cylinder at a frequency of 5-10 seconds per piece, and add another piece of billets to the furnace every time one is pushed out.

[0030] Upsetting the heated billet to the specified size.

[0031] Using CNC precision forging presses and special molds, the upsetting billets are back-extruded into part-sized billets with a pressure of 300T. Specific parameters such as the speed, frequency, force level, time and other specific parameters of the CNC precision for...

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Abstract

The invention discloses an extrusion processing method for an external star wheel. The method comprises the steps that S1, blanking is carried out according to a component size; S2, medium frequency induction heating is carried out on blank material; S3, upsetting of the blank material heated to a target temperature is conducted until specified dimensions are achieved; S4, warm extrusion of the blank material subjected to upsetting is conducted until a blank in the component size is formed; S5, spheroidizing annealing is carried out on the blank; S6, cleaning is carried out; S8, phosphating is carried out on the blank; S9, saponification processing is carried out on the component; S10, cold finishing is carried out on the blank by utilizing a cold forging die and a pressure machine; and S11, the blank after cold finishing is checked. The forming precision of the external star wheel is improved and material consumption is reduced. Metal flow lines inside the blank are axially distributed and the mechanical property is better. The machining allowance of a forge piece is optimized and most cutting machining tasks can be removed. The product precision is improved and the cost is greatly reduced.

Description

technical field [0001] The invention belongs to a metal processing method, and in particular relates to a processing method for an outer star wheel for an automobile transmission shaft. Background technique [0002] The cage type constant velocity universal joint will produce a lot of noise and vibration due to the gap in the direction of rotation, and the star sleeve is the most important part of the ball cage type constant velocity joint. The key to improving the manufacturing accuracy of the star sleeve is To improve the machining accuracy of the groove of the star sleeve part, under the condition that the accuracy of the machine tool remains unchanged, it is necessary to design and develop a reasonable fixture in order to obtain stable machining accuracy, improve productivity and reduce processing costs. The traditional processing method in our country adopts the cutting processing method, which not only has a very low material utilization rate (less than 40% on average)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/14
CPCB23P15/14
Inventor 王弟兵龚廷柱赵玉华
Owner SICHUAN HUAQING MACHINERY
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