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一、加工要求我厂制造的1200四重式冷轧板机,主机部分的机架是最重要的组成零件。每片机架(C_T 25)的外形(见图1)和重量(约78吨)都是超重型,并且由于受力情况复杂,故精度要求也较高,现列举如下(参阅图1):(1)机架压下螺孔端面 C 与窗口内侧面 A 的垂直度误差每米不超过0.1毫米;(2)机架下梁两侧地脚面 D 的平行度误差不超过0.1毫米;(3)窗口内侧面 A 与底面 B 的垂直度误差每米不超过0.1毫米;(4)窗口内侧面4的平行度误差每米不超过0.1毫米;(5)机架压下螺孔端面 C 与下梁两侧地脚面 D
First, the processing requirements I plant 1200 quadruple cold-rolled plate machine, the host part of the rack is the most important components. The outline (see Figure 1) and the weight (about 78 tonnes) per rack (C_T 25) are overweight and require high precision due to the stress conditions (see Figure 1): (1) The tolerance of the verticality between the end face of the screw hole and the inner side of the window A is not more than 0.1mm per meter; (2) The parallelism error of the foot surface D on both sides of the lower frame of the machine frame does not exceed 0.1mm; ) The inner side of the window A and the bottom surface B of the vertical error of not more than 0.1 mm per meter; (4) the parallelism of the inner side of the window 4 error of not more than 0.1 mm per meter; (5) Beam on both sides of the foot D