The harm of thermal deformation of the automatic CNC lathe system software to the accuracy. The automatic CNC lathe is a high-performance, high-precision, low-noise feed type automatic technology lathe. It can carry out uninterrupted and repeated production and processing of materials such as copper, aluminum, iron, zinc alloy materials, and plastics. It has the characteristics of fully automatic loading, cutting, and cutting. Especially suitable for mass production and processing fields such as automobile and motorcycle accessories, refrigeration accessories, plumbing valves, electrical and electronic, mechanical equipment hardware, etc., which can reduce a lot of manpower. Common automatic lathes include automatic CNC lathes, hydraulic automatic lathes, pneumatic automatic lathes, and camshaft automatic lathes.

Production and processing deviations caused by thermal deformation of precision CNC lathes. Lathes are harmed by pyrogens, and the temperature of each part will change. Because of the unevenness of the pyrogens and the complexity of the structure of the lathe, each component of the lathe will produce different levels of thermal deformation and damage. The original geometrical accuracy of the lathe has been improved, which in turn caused deviations in production and processing. The key pyrogen of lathe type lathes is that the friction of the rolling bearings, transmission gears, clutches and other transmission systems in the headstock increases the temperature of the headstock and bed body, which in turn causes the main shaft of the lathe to elevate and tilt. The deviation of the main axis in the horizontal direction is only 10μm, while the deviation of the vertical angle is 180~200μm. This is less harmful to the production and processing accuracy of the vertical lathe with CNC blade level assembly, but for the automatic lathe and CNC punch lathe used for the vertical installation of the CNC blade, the harm to the production and processing accuracy cannot be ignored.

Part of the mechanical energy of the CNC blade or the product workpiece during the whole process of drilling on the automatic CNC lathe is consumed by the drilling work, and part of the mechanical energy of the CNC blade or the product workpiece is consumed by the drilling deformation energy and the friction heat between the cutting and the CNC blade, forming the CNC blade, the spindle and the product workpiece hot , And a lot of cutting heat conduction to the lathe's operating table tooling fixtures and other components. They will affect the relative parts between the CNC blade and the product at the same time. Refrigeration is a countermeasure against the increase in the temperature of the lathe, such as motor cooling, spindle component cooling and basic parts cooling, etc. The lathe usually equips the electric control cabinet with a refrigeration unit to give forced refrigeration. According to the thermal characteristics of contemporary machine tools, the basic theoretical model and analysis of thermal characteristics of a certain type of fast and high-precision CNC lathe spindle system software are carried out using finite element principles. The results show that when the spindle speed ratio is 8000r/min, the system software The thermal cycle is achieved within 3 hours, and its large temperature rise is located at the inner hole of the front rolling bearing. The thermal deformation of the spindle system software is further measured, and according to the reasonable layout and reliability design of the heat exhaust ribs of the spindle shell, the top of the spindle head is reasonably reduced The axial flutter and end jump deviation of the spindle head are lower than 2 μm, which can meet the requirements of the design plan. In particular, the axial flutter deviation at the top of the spindle head is further reduced to 1.55 μm after the reliability design, and the actual effect of the improvement is very obvious.