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前 言 一九八七年,我厂试制生产薄壁缸套,由于缸套壁薄,径向刚度差,加工中容易产生弹性变形,加工内外圆几何精度要求高,同轴度公差很严,给机械加工带来很大困难。 目前,我厂已生产出上海50、6102两种型号的薄壁缸套。本文主要以我们的实践体会,以6102缸套为例,着重从工艺流程安排方面粗谈薄壁缸套加工工艺问题。 一、6102缸套加工中的主要困难 我厂为青海汽车发动机厂配套生产的6102成品缸套外圆直径为105.6毫米,内圆直径为101.56毫米,壁厚仅为2毫米,材质为硼磷合金铸铁（HT25—47）,毛坯采用离心浇注,硬度控制在HB210以上。 由于缸套壁很薄,径向刚性差,加工材质硬度高,脆性大,加工时,在夹紧力和切削力影响下,很容易发生弹性变形。用通俗的语言讲:这种缸套很娇气,难成形。因此对它的加工工艺流程要精心考虑,关键是加工过程的变形控制。要以尽量减少切削用量而降低切削力
Preface In 1987, our factory trial production of thin-walled cylinder liner, due to the cylinder wall thin, poor radial stiffness, processing easy to produce elastic deformation, the machining requirements of the geometric accuracy of the inner and outer circles, coaxial tolerance is very strict, to Machining brings great difficulties. At present, our factory has produced two models of Shanghai 50,6102 thin-walled cylinder liner. In this paper, the main experience of our experience to 6102 cylinder liner, for example, focusing on the process flow from the rough talk about the processing of thin-walled cylinder problems. First, the main difficulties in the processing of 6102 cylinder liner Our factory for the production of 6102 cylinder liner Qinghai Automotive Engine Factory cylindrical diameter of 105.6 mm diameter, inner diameter of 101.56 mm, wall thickness of only 2 mm, made of boron-phosphorus alloy Cast iron (HT25-47), the use of centrifugal casting centrifugal, hardness control in HB210 above. As the cylinder wall is very thin, poor radial rigidity, high hardness and brittleness, the processing, under the influence of clamping force and cutting force, is prone to elastic deformation. In plain language: this cylinder is very fragile, difficult to shape. Therefore, its processing process to be carefully considered, the key is the deformation process control. Cutting force should be reduced to minimize cutting force