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A comprehensive evaluation method of high-speed press structure scheme

A comprehensive evaluation and press technology, applied in the field of presses, can solve problems such as resonance, high-speed press collapse, and damage to key components of high-speed presses

Active Publication Date: 2020-07-03
ZHEJIANG UNIV
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AI Technical Summary

Problems solved by technology

During the working process of the high-speed press, when any natural frequency is close to the stamping frequency, resonance will occur, which will lead to damage to key components of the high-speed press or even the collapse of the high-speed press

Method used

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  • A comprehensive evaluation method of high-speed press structure scheme
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  • A comprehensive evaluation method of high-speed press structure scheme

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Embodiment Construction

[0031] The structural scheme of the high-speed press of the present invention is preferably a high-speed press with a nominal force of 3000kN and a stamping frequency of 80-240spm as an example. Therefore, in the design process of high-speed presses, the maximum deformation of the slider needs to be as small as possible, and the strength of the upper beam must be ensured so that the maximum equivalent stress is less than [60,61] MPa. At the same time, during the stamping process of the slider at a stamping frequency of 80-240spm, its low-order natural frequency should avoid the range of 1.33-4Hz to prevent resonance. Considering that resonance may also occur when the natural frequency of the slider is close to the working frequency of 50Hz, it is also necessary to avoid this frequency range. In addition, the structural manufacturability of the entire high-speed press has an important impact on its production cost, and it is also used as one of the evaluation indicators. It ca...

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Abstract

The invention discloses a comprehensive evaluation method of high-speed press structure schemes. A comprehensive evaluation index system of the high-speed press structure schemes is established, and a target value, which each evaluation index needs to approach or avoid, and a weight thereof are given; the evaluation index value of each candidate scheme is represented as a real number, an interval number or a triangular fuzzy number; weighted standardization is carried on deviant-type and fixed-type evaluation indexes in each candidate scheme after equivalent transformation, and weighted standardization is directly carried out on benefit and cost-type evaluation indexes; positive and negative ideal solutions are determined according to the type of each evaluation index; distances from each scheme to the respective positive and negative ideal solutions are calculated; a relative closeness degree is obtained according to the distances from each scheme to the positive and negative ideal solutions; and the candidate scheme with the maximum relative closeness degree is the best scheme. The method is based on a TOPSIS method, combines with interval probability degrees and relative preference relationships to comprehensively evaluate the high-speed press structure schemes, and can effectively obtain the best scheme with good comprehensive performance and structure manufacturability.

Description

technical field [0001] The invention relates to the technical field of presses, in particular to a comprehensive evaluation method for structural design schemes of high-speed presses. Background technique [0002] The high-speed press is an automatic punching machine aimed at continuous high-speed stamping. It is widely used in industries such as automobiles, aerospace, and instrumentation because of its advantages in clean and green production. In the design process of high-speed presses, the optimization of its structural scheme has a direct and important impact on realizing low-cost high-precision stamping and prolonging the service life of supporting dies. Slides and upper beams are key components of high-speed presses. Its mechanical properties such as stiffness and strength greatly affect the quality of stamping products and the service life of supporting molds. The stiffness of the high-speed press slider is usually expressed by the maximum deformation during the st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/10
CPCG16Z99/00
Inventor 程锦张杨燕冯毅雄刘振宇谭建荣
Owner ZHEJIANG UNIV
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