一.前言机床的切削、电动机、液压系统和机械摩擦等都是使机床产生温升和热变形的各种热源。国内外的生产实践已证明,在精密加工中,由于热变形引起的制造误差,占总的制造误差的一半以上。科学技术的日益发展,使人们对零件加工精度的要求也逐步提高。自动化程度的不断发展,使操作人员对加工精度的控制逐渐为机床的自动化所代替,故机床热变形对加工精度的影响已引起 I. Foreword Cutting machine, electric motor, hydraulic system and mechanical friction are all kinds of heat sources that make the machine produce temperature rise and thermal deformation. Production practices at home and abroad have proved that in precision machining, manufacturing errors due to thermal deformation account for more than half of the total manufacturing error. The increasing development of science and technology, so that people on the parts processing accuracy requirements are gradually increased. The continuous development of the degree of automation, so that the operator of the machining accuracy control gradually replaced by the automation of the machine, so the machine tool deformation of the thermal deformation of the impact has been caused