How to rationally optimize and design the heat dissipation structure of high-speed punch

2022-06-07

The outstanding design of thermal state characteristics is to find the ideal temperature field distribution and comprehensive stiffness distribution from the physical structure form and various parameters of high-speed punching to control thermal displacement and ensure the accuracy of high-speed punching. In the design of high-speed punching, the symmetrical structure should be adopted as far as possible, the characteristics of the thermally symmetrical surface should be fully utilized, the influence of thermal deformation on stress and strain should be fully considered, and the thermally symmetrical structure or heat source distribution structure should be adopted to eliminate the influence of thermal deformation on stress. For example, the base is precision punched, the beam is tightened with four wire drawing screws, the body rigidity is good, and the deformation is small. The support structure is a four-point crankshaft support structure, which can improve the strength of the crankshaft and reduce deformation;

1. Effectively separate two heat sources.

The basic idea is to separate the heat source of the high-speed punching body and reduce the heat. From the perspective of high-speed punching structure design, the structural characteristics of precision punching are comprehensively considered from the three aspects of static stiffness, dynamic stiffness and thermal stiffness. Heat balance design is also to reduce heat. The effective method of deformation, due to different parts materials and different heat capacities, so the heat capacity is large, the warm part should be used, and the temperature rise control or heat transfer method should be used to reduce the temperature difference of other zero systems, so as to achieve the relative balance of the entire high-speed punching temperature .

2. Reduce the heat of the heat source.

For high-speed punching, there is a large relative speed on the relative moving friction surface, which leads to severe friction heating, which not only accelerates the wear and deterioration of parts, but also reduces its service life. In order to reduce heat, the characteristics of each moving surface can be considered, and should be minimized The friction coefficient of high-speed punching surfaces, especially crankshafts and connecting rods, crankshafts and beds, drive shafts and beds should consider reducing frictional heating to reduce heat, and finding new cost-effective materials is a good solution.

3. Strengthen the heat dissipation performance of the high-speed punch.

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

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