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Method for forming precision forging billet of output spline shaft of automobile automatic transmission

A technology of automatic transmission and forming method, applied in metal processing equipment and other directions, can solve the problems of high comprehensive cost, low material utilization, and difficult processing, and achieve high production scheduling and production organization efficiency, high material utilization, and forming accuracy. high effect

Active Publication Date: 2012-01-18
CHONGQING CHUANGJING WARM FORGING FORMING
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Problems solved by technology

The traditional processing method of this part is to machine the hexagonal inside the end and the spline teeth on the shaft, which makes the processing difficult, slow, damages the fiber orientation of the part, and affects the strength; in addition, there are also low material utilization, high overall cost, and no lack of market competitiveness

Method used

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  • Method for forming precision forging billet of output spline shaft of automobile automatic transmission
  • Method for forming precision forging billet of output spline shaft of automobile automatic transmission
  • Method for forming precision forging billet of output spline shaft of automobile automatic transmission

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Embodiment Construction

[0029] like figure 1 Among them, the automobile automatic transmission output spline shaft precision forging blank forming method of the present invention is characterized in that comprising the following steps:

[0030] (1) Prepare the raw materials according to the process design requirements, grind the surface of the raw materials, check the cracks, and then saw them into material sections, and remove the material sections that do not meet the requirements; generally use ∮45mm diameter bar;

[0031] (2) Heat the material section to 1080-1160°C; specifically, 1090°C, 1100°C, 1110°C,

[0032] 1120°C, 1130°C, 1140°C, 1150°C, etc.

[0033] (3) Elongate the material section on the press to increase the length-to-diameter ratio of the blank, and obtain a blank whose length-to-diameter ratio meets the process requirements; use an air hammer to elongate the specific press, and use a forming mold to constrain the outer diameter. Effectively solve the defect of easy folding...

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Abstract

The invention discloses a method for forming a precision forging billet of an output spline shaft of an automobile automatic transmission. The method comprises the following steps of: preparing for raw materials according to process design requirements, and sawing the raw materials into material sections; heating the material sections to 1080-1160 DEG C; drawing the material sections on a press; placing a billet in a hot forging mould to hot forge and form; trimming; hot treating the billet so that the hardness of the billet is up to HB150-170; carrying out conventional shot blasting treatment and surface treatment; cold extruding the billet in a cold extrusion mould; and obtaining a machined qualified product, namely the precise forging billet. According to the method for forming the precision forging billet of the output spline shaft of the automobile automatic transmission disclosed by the invention, the cold forging process and the hot forging process are combined, therefore, the forming precision is high, and the material utilization rate is high and up to above 95%; the internal hexagon of a large head and an outer spline on a shaft are extruded and formed simultaneously in the same cold extrusion process; and, because of the hot forging and the cold forging, a metal part flows and is oriented, therefore, the product intensity is increased.

Description

technical field [0001] The invention relates to a cold and hot forging forming process for an output shaft of an automatic transmission of an automobile, in particular to a process for forming a fine forging billet of an output spline shaft of an automatic transmission of an automobile. [0002] Background technique [0003] The output spline shaft of the automobile automatic transmission is the transmission part of the power output of the automobile, which is very important for the safe driving of the automobile. Its quality directly affects the continuity, stability, and strength of the car's power output and determines driving safety. The traditional processing method of this part is to machine the hexagonal inside the end and the spline teeth on the shaft, which makes the processing difficult, slow, damages the fiber orientation of the part, and affects the strength; in addition, there are also low material utilization, high overall cost, and no Insufficient market com...

Claims

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Application Information

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IPC IPC(8): B21J5/00B21C23/01
Inventor 胡斌敬勇胡昌泽
Owner CHONGQING CHUANGJING WARM FORGING FORMING
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