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Automatically continuously variable transmission (CVT) V-shaped belt pulley axle finish-forging and plastic- molding process

An automatic transmission, plastic forming technology, applied in the field of CVT transmission V-belt pulley

Active Publication Date: 2014-04-09
江苏威鹰机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the deficiencies of the prior art, and mainly solves the existing traditional processing technology. The investment in machine tool equipment is large, the cutting process wastes metal materials, and the labor production efficiency is low. To solve the technical problems of long cycle time and high processing cost, a precision forging and plastic forming process for the V-shaped pulley shaft of a CVT automatic transmission is provided by using the temperature-cooling compound precision forging plastic forming technology.

Method used

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  • Automatically continuously variable transmission (CVT) V-shaped belt pulley axle finish-forging and plastic- molding process
  • Automatically continuously variable transmission (CVT) V-shaped belt pulley axle finish-forging and plastic- molding process
  • Automatically continuously variable transmission (CVT) V-shaped belt pulley axle finish-forging and plastic- molding process

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Its plastic forming process includes the following steps: ① Warm forging plastic forming: including a, material cutting: cutting metal bars with a circular saw; Surface chamfering, shot blasting: put the billet into the shot blasting machine for surface sandblasting; c, coating: heat the above metal bar to 150-200 ° C, soak in thin graphite, and carry out surface coating; d, normalize after heating Extrusion: Heat the above-mentioned coated billet to 800-900°C and put it into the die, extrude the upper end surface of the billet, so that the rod becomes a three-section cylindrical rod with different diameters and lengths and The transition section between them; e. Upsetting extrusion: Put the billet that has been extruded into the upsetting die immediately, and in the closed mold cavity, perform upsetting extrusion on the billet to form a double-ended rod Part 6 and middle disc part 7; f. Preforming positive extrusion: In the closed mold cavity, the billet is extruded to...

Embodiment 2

[0022] Embodiment 3: A CVT automatic transmission V-shaped pulley shaft precision forging plastic forming process, the production steps are the same as in Embodiment 1, the difference is that the input end 1 is a circular platform connected to a cylindrical structure.

Embodiment 3

[0023] The embodiment is only for the convenience of understanding the technical solution of the present invention, and does not constitute a limitation to the protection scope of the present invention. Any simple modification, equivalent change and Modifications still fall within the protection scope of the present invention.

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Abstract

The invention discloses an automatically continuously variable transmission (CVT) V-shaped belt pulley axle finish-forging and plastic-molding process including the steps of 1, warm forging and plastic molding, 2, annealing at low temperature, lathing including procedures of surface flash and burr removal, shot blasting, phosphating and saponification, and then reducing diameters of shanks of forge pieces subjected to cold squeezing and finishing until meeting the dimension requirements, and 3, finally molding by the cold squeezing and finishing process. Products produced by the process have the advantages of stable quality, high intensity and density and impact resistance; a great quantity of funding needed in the process of machining tooth surfaces by machine tools is reduced, production efficiency is high, raw materials are saved, the process of machining by the machine tools after hot forging is replaced, requirements for product precision are met, production cycle can be shortened, manufacturing cost can be lowered, and the process accords with the development trend of the manufacturing industry all over the world at present.

Description

technical field [0001] The invention relates to a V-shaped pulley shaft of a CVT gearbox, in particular to a precision forging plastic forming process for a V-shaped pulley shaft of a CVT automatic gearbox. Background technique [0002] The CVT gearbox does not have a specific gear position. It is similar to an automatic gearbox in operation, but the change of the speed ratio is different from the shifting process of the automatic gearbox. It is continuous, so the power transmission is continuous and smooth. The V-shaped pulley shaft is a mechanical key component for CVT transmissions to transmit movement and torsion. Its inherent quality and precision directly affect the overall quality of the transmission. China Intellectual Property Office discloses CN201110416697.7 a driving pulley shaft, which mainly includes an input end and a pulley surface, the input end is arranged at the rear of the pulley surface, the front portion of the pulley surface is a pulley installation se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/14
CPCB23P15/14
Inventor 张太良万永福张扣宝黄恒桃申剑
Owner 江苏威鹰机械有限公司
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