Cold Extrusion Forming Technology of Pinion Shaft in Power Steering Gear

A power steering gear, pinion shaft technology, applied in the direction of shafts, shafts and bearings, mechanical equipment, etc., can solve the problems of difficult to ensure product consistency, difficult to control machining accuracy, high production costs, improve internal quality and reduce waste. rate, and the effect of improving utilization
CN102284831AInactive Publication Date: 2011-12-21上海久丰汽车零件有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
上海久丰汽车零件有限公司
Publication Date
2011-12-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a cold extrusion molding process of a pinion shaft in a power steering gear, which comprises the following steps: step 1, sawing a cylindrical blank with a required length on a disc according to product requirements; step 2, grinding The outer circle of the cylindrical blank; Step 3, carry out the first phosphorus saponification treatment to the cylindrical blank according to the conventional phosphorus saponification process; Step 4, put the blank into a cold extrusion molding die for forward extrusion process , be pressed into the preform of pinion shaft; step five, carry out spheroidizing annealing treatment to preform; step six, carry out the second phosphorus saponification process to blank according to conventional phosphorus saponification process; step seven, pass through The blank in step 6 is then put into a cold extrusion molding die for a reverse extrusion process to be pressed into a cold extrusion of the pinion shaft. The cold extrusion molding process of the pinion shaft in the power steering gear of the present invention realizes one-time molding of the pinion gear shaft in the power steering gear, and realizes less cutting or no cutting processing of complex cavity parts.
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Description

technical field

[0001] The invention relates to a cold extrusion process, in particular to a cold extrusion forming process for a pinion shaft in a power steering gear. Background technique

[0002] The pinion shaft in the steering gear is a part of the car, and its cold extrusion structure (see figure 1 and figure 2 ) includes a cylindrical small shaft 11 at the top, a cylindrical central shaft 12 formed by increasing the diameter through a step, and a sleeve 13 with a blind hole-shaped cavity at the bottom formed by increasing the diameter through a step. The lower part 131 of the cavity is cylindrical, and the cross section of the upper part 132 is a two-piece fan-shaped center symmetrical and transitions with the cylindrical lower part 131 of the cavity in a stepped shape. The pinion shaft in the prior art is mainly processed by cutting, which not only complicates the process and consumes a lot of money, but also makes it difficult to control the machining accuracy, e...

Claims

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