The design with outstanding thermal characteristics is to find the ideal temperature field distribution and comprehensive stiffness distribution based on the physical structure and various parameters of the high-speed punching machine in the presence of a heat source, in order to control thermal displacement and ensure the accuracy of the high-speed punching machine. In the design of high-speed punching machines, symmetrical structures should be adopted as much as possible, fully utilizing the characteristics of thermal symmetry surfaces, fully considering the influence of thermal deformation on stress and strain, and using thermal symmetry structures or heat source distribution structures to eliminate the influence of thermal deformation on stress. For example, the precision punch press base and crossbeam are tightened with four brushed screws, resulting in good rigidity and minimal deformation of the machine body. The support structure is a four point crankshaft support structure, which can improve the strength of the crankshaft and reduce deformation;

Effective separation of two types of heat sources

The basic idea is to separate the heat source of the high-speed punch press body, reduce heat generation, and design the structure of the precision punch press from the perspective of thermal stiffness of the high-speed punch press. The structural characteristics of the precision punch press are comprehensively considered from three aspects: static stiffness, dynamic stiffness, and thermal stiffness. Among them, thermal balance design is also an effective method to reduce thermal deformation. Due to the different materials of the parts, the thermal capacity will also vary. Therefore, for parts with larger thermal capacity, temperature rise control or heat transfer methods should be used to reduce the temperature difference with other zero point systems with smaller thermal capacity, so as to achieve relative temperature balance of the entire high-speed punch press.

Reduce the heat generation of the heat source

For high-speed punching machines, there is a high relative velocity on the friction surfaces of the relative motion, which causes severe frictional heating. This not only accelerates component wear and deterioration, but also reduces its service life. To reduce heat generation, the friction coefficient of each moving surface of the high-speed punching machine should be minimized as much as possible, especially in the design of moving parts such as the crankshaft and connecting rod, crankshaft and bed, transmission shaft and bed, etc., which should consider reducing frictional heating to reduce heat generation. Finding new materials with high cost-effectiveness is a good solution.

Strengthen the heat dissipation performance of high-speed punching machines

Improve the heat dissipation fins at each heat source of the high-speed punch press, increase the heat transfer coefficient, and increase the heat dissipation area.