机械加工是机械工业基础工艺之一，与国外先进水平相比，我国机械加工工艺及设备无论在品种、质量，还是在加工效率和效益方面均有很大的差距，远远不能满足国民经济发展的需要，每年尚需花费大量外汇购买国外设备。为了能为国民经济各行业提供先进适用的产品，机械加工行业极 Machining is one of the basic technology of mechanical industry. Compared with the advanced level in foreign countries, China’s machining technology and equipment have a great disparity in terms of variety, quality, efficiency and efficiency of processing, far from meeting the requirements of national economic development The need to spend a lot of foreign exchange each year to buy foreign equipment. In order to provide advanced and applicable products for all sectors of the national economy, machining industry extremely