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| Four points describe the heat dissipation design of high-speed punch |
| Date:2021-11-22 |
Four points explain the prominent heat dissipation design of high-speed punch
1. Reasonable and optimal design of punch structure
The thermal outstanding design is to find the perfect temperature field distribution and comprehensive stiffness distribution of the structure as far as possible from the physical structure shape and various parameters of the high-speed punch when there is a heat source, so as to control the thermal displacement drilling of the high-speed movement and ensure the accuracy of the high-speed punch. Using the concept of "thermal symmetry plane", the thermal symmetry structure or heat source distribution is designed, and the characteristics of the symmetrical structure are used to offset the stress and strain caused by thermal deformation. In the design of high-speed punch, try to adopt symmetrical structure. For example, the base and beam of precision punch are fastened with four fastening screws, so the body has good rigidity and small deformation. The support structure is a four point crankshaft support structure, which can increase the strength of the crankshaft and reduce deformation.
2. Effective separation of heat sources
The main idea is to separate the heat source from the high-speed punch body to reduce the heat. The structure of precision punch is designed from the perspective of thermal stiffness of high-speed punch. Considering the design of static stiffness, dynamic stiffness and thermal stiffness of precision punch as a whole, heat capacity balance design is also an effective method to reduce thermal deformation. Due to different parts and materials of machine tools, the heat capacity is also different. Therefore, for the part with large heat capacity, the method of controlling temperature rise or transferring heat is used to reduce the temperature difference with other zero systems with small heat capacity, so as to achieve the relative balance of the temperature of the whole high-speed punch.
3. Reduce the calorific value of heat source
For the high-speed punch, the relatively moving friction surface has a large relative speed, resulting in serious friction heat, which not only accelerates the wear and deterioration of parts, but also reduces their service life. In order to reduce the generation of heat, from the perspective of its characteristics, the friction coefficient of each moving surface of the high-speed punch should be as small as possible, especially the crankshaft, connecting rod The space of crankshaft and bed, transmission shaft, bed and other moving parts shall be designed to reduce friction heat to reduce heat generation. Therefore, seeking new materials with higher cost performance is one of the good solutions.
4. Strengthen the heat dissipation of high-speed punch
Improve the heat dissipation strip at each heat source of the high-speed punch, improve the heat exchange coefficient and enhance the heat dissipation area. |
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