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1前言 492Q缸套是我厂主导产品之一,年产毛坯30万只,采用离心铸造生产的492Q缸套毛坯传统工艺是;将小头加长（一般25～30毫米）,以避免小头硬度偏高导致加工困难。机加工 艺;大端平头而小端切头。造成铁水利用率低,材料浪费。且由于切头加工时切削难度大,而毛坯硬度范围要求较窄,人为造成所谓“料硬”废品,废品率2％。而且刀具废损也较大,随着材料涨价、与之生产的不断发展,传统的毛坯工艺给冷热加工带来的不利因素也愈
1 Foreword 492Q cylinder liner is one of the leading products in our factory, with an annual output of 300,000 rough, centrifugal casting production of 492Q Cylinder Liner blank traditional process is; the small head extended (usually 25 to 30 mm) to avoid small head hardness High lead to processing difficulties. Machining process; big end and small end cut. Resulting in low utilization of hot metal, material waste. And due to cutting cutting difficult, and the rough range of the requirements of the narrower, artificially causing the so-called “hard material” waste, 2% rejection rate. And tool damage is also greater, with the material prices, with the continuous development of production, the traditional blank technology to hot and cold processing, the more unfavorable factors