System Error Concept Of Thermal Deformation Control Measures Of Cutting Machine

- Oct 12, 2020-

(1) Reduce heat generation and heat insulation. In order to reduce the heat generated by the machine tool in the process system, all heat sources that may be separated from the host. Such as the motor, gearbox, screw pair, fuel tank, etc., should be placed outside the machine tool as much as possible. For parts and components that can separate heat sources, such as main shaft bearings, screw pairs, wheel pairs, friction clutches, etc., the friction characteristics should be improved from the structure and lubrication to reduce heat generation.

Cutting machine is an important part of reducing thermal deformation. For this reason, static pressure bearings, low temperature dynamic pressure bearings and air bearings are usually used in the manufacture of machine tools, and low bulge lubricating oil is used. These are all conducive to controlling the increase in bearing temperature. *If the heat source cannot be separated from the machine tool, it can be Install heat insulation materials on the joint surfaces of these heating parts and large machine tools (when the heat source does not dissipate well, heat dissipation measures should be adopted) to prevent heat conduction.

(2) The heat of the cutting machine controls the temperature rise and thermal deformation of the machine tool. Machine tools such as CNC machine tools and processing towel cores generally use refrigerators to forcibly cool the lubricating oil, which greatly reduces the heating and deformation of the headstock components.

(3) Speed up the temperature rise and maintain thermal balance. According to the law of internal thermal deformation, after the cutting machine reaches the thermal equilibrium in the preheating stage of the machine tool, the thermal deformation gradually tends to be fixed, and the machining accuracy can be guaranteed after that. Out of this, shorten the warm-up period of the machine tool, which is beneficial to improve productivity and ensure processing accuracy.