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机床主轴圆度的好坏将直接影响机床的质量.但在生产中,要使一般精度的外圆磨床,如M1432A,能加工出圆度小于0.5μm的主轴是一件十分困难的事. 最近,我们在M1432A×1000mm外圆磨床上,在机床精度不作任何调整的情况下,对工件圆度的磨削作了一系列工艺试验.结果磨出的试件圆度最好达0.2μ,最差为0.3μm,效果很理想.现将试验情况介绍于下: 一、影响工件圆度的因素 1.拨叉回转半径对圆度的影响以往磨削外圆一般是在头尾架上装上硬质合金死顶尖顶住工件中心孔,用鸡心夹头夹住工件,由头架
Machine tool spindle roundness will have a direct impact on the quality of the machine tool.But in the production, to make general precision cylindrical grinder, such as the M1432A, can produce roundness of less than 0.5μm spindle is a very difficult thing.Recently , We made a series of technological tests on the circularity grinding of the workpiece on the M1432A × 1000mm cylindrical grinding machine without any adjustment of the machine precision.Results The circularity of the polished sample is best 0.2μ The difference is 0.3μm, the effect is very ideal. Now test the situation introduced in the following: First, the factors that affect the roundness of the workpiece 1 fork radius of gyration on the roundness of the past Grinding OD is generally installed in the head and tail rack hard Cemented carbide die to withstand the center of the workpiece to the top hole, with the heart of the chuck holding the workpiece, from the head frame