Granulator Cutter Workpiece deformation is frequently encountered during actual cutting processes. When discussing thermal deformation, many people think of dimensional deformation of the cutting material. However, the granulator's cutter itself, as a thermal cutting device, can also undergo structural deformation due to temperature changes during frequent use and processing. Although the granulator's cutter, as a production and processing equipment, employs a series of processes during manufacturing to minimize the impact of thermal deformation, it is still necessary for users to understand this knowledge, standardize operational procedures, and reduce thermal deformation.

　　1. Reduce Heat Generation

　　The main heat source of thermal deformation when the machine is heated should be separated from the main unit as much as possible.

　　2. Control Temperature Rise

　　After taking a series of measures to reduce the heat source, thermal deformation is improved. However, it is very difficult, or even impossible, to completely eliminate the internal and external heat sources of the machine tool. Therefore, it is necessary to control the temperature rise through good heat dissipation and cooling to reduce the impact of the heat source. One of the more effective methods is to forcibly cool the heated parts of the machine tool. By heating the low-temperature parts of the machine tool, the temperature of each point of the machine tool can be made consistent, reducing warping caused by temperature differences.

　　3. Improve Machine Tool Structure

　　Under the same heating conditions, the machine tool structure also has a great impact on thermal deformation. For example, the single-column structure used in CNC machine tools in the past may be replaced by a double-column structure. Due to the left-right symmetry, the thermal double-column structure spindle has very little deformation in directions other than vertical translation, and vertical axis movement can be easily compensated through coordinate correction.

　　The thermal deformation of the shaft occurs in the vertical direction of the tool, which minimizes the impact of spindle thermal deformation on the processing diameter. Structurally, the distance between the spindle center and the spindle and the ground should be minimized to reduce the total amount of thermal deformation. At the same time, the temperature rise of the spindle box should be consistent to avoid spindle tilting after deformation.

　　The ball screw in CNC machine tools often operates under conditions of high expected load, high speed, and poor heat dissipation, so the screw is prone to heat generation. The heat generation consequences of the ball screw are serious, especially in open-loop systems, which will cause the feed system to lose positioning accuracy. Currently, some machine tools use pre-tensioning to reduce the thermal deformation of the screw. For thermal deformation that cannot be eliminated after taking the above measures, the CNC system can issue compensation pulses for correction based on the measurement results.