|
Abstract：
|
|
The steering spiral bar is difficult to be machined and its utilization ratio of the material is lower.Although the utilization ratio of the material and its productivity can be raised by making its blank through the hot die forging first and then being machined,its quality and quantity still can not meet the requirement.To raise the productivity further,the cold-extruding shaping technology for net-shaping the inner spline was adopted.After the cold-extruding convex die involute spline of a steering spiral bar was cut and machined,the concentricity of the extruding die was assured through grinding & polishing and match-grinding its fixed-sleeve on the gear shape surface basis.Therefore,it could assure its concentricity of the inner cavity in the extruding parts.During the extruding process,a new water-base high molecule lubricant was used to lubricant the steering spiral bar blank of 20CrMnTi steel in soft-annealing which could full fill the inner spline of the coldextruding parts.Thus,the inner spline and small hole had not to be machined again to avoid producing any micro crackle and it could meet the design requirements of the part drawing.Through checking,machining,assembling and adjusting test,the steering spiral bar made by this cold-extruding shaping process is good in quality with high precision and it can meet the part operating requirements.
|
|
Funds：
|
|
|
|
AuthorIntro：
|
|
|
|
Reference：
|
[1]洪深泽.冷挤压工艺及模具设计[M].合肥:安徽科学技术出版社,1985.
[2]赵德颖,孙惠学,张春义.轿车转向节闭塞挤压成形新工艺研究[J].锻压技术,2006,31(2):36-38.
[3]翟德梅.挤压工艺及模具[M].北京:化学工业出版社,2004.
[4]孟令先,宋学进,张元国,等.汽车启动齿轮的高效成形方法[J].锻压技术,2005,30(1):13-15.
[5]王春举,单德彬,郭斌,等.纯铝和LY12铝合金微塑性成形性能评价试验研究[J].锻压技术,2005,30(1):7-9.
[6]庞祖高,苏广才,夏薇,等.影响温挤压模具的寿命因素及对策探讨[J].锻压技术,2006,31(2):52-55.
|
|
Service：
|
|
【This site has not yet opened Download Service】【Add
Favorite】
|
|
|
|
Copyright Forging & Stamping Technology.All rights reserved