Identification of Joint Part Parameters of HSK Spindle-toolholder Based on Closed-form Approach

doi:10.3969/j.issn.1000-1093.2015.07.021

Abstract

Abstract: The basic condition for predicting the dynamic performance of spindle system and keeping the cutting stability is to identify the parameters of HSK spindle-toolholder joint part. HSK spindle-toolholder joint part is simplified as spring-damp model. According to the frequency response function(FRF) matrix of HSK spindle-shrink toolholder system, the stiffness matrix of HSK spindle-toolholder is derived. the FRF matrix of shrink toolholder is obtained based on coupling response method. The FRF matrixes of the tip points of HSK spindle and HSK spindle-shrink toolholder system are got by using finite difference method and experiment. Four stiffness parameters (k_yf, k_θf, k_ym and k_θm) and four damp parameters (c_yf, c_θf, c_ym and c_θm) are identified with the stiffness matrix. FRF of tip point of HSK spindle-toolholder system is achieved by using the coupling response method. The calculated frequency of HSK spindle-toolholder system is compared with the experimental frequency. The maximal difference between theoretical and experimental results is 7.9%.

Key words: manufaturing technology and equipment, HSK spindle-toolholder joint part, FRF matrix, parameter identification

CLC Number:

TG504

CHEN Jian, TIAN Liang , SHANG Hong-mo , ZHENG Deng-sheng, WANG Gui-cheng. Identification of Joint Part Parameters of HSK Spindle-toolholder Based on Closed-form Approach[J]. Acta Armamentarii, 2015, 36(7): 1309-1317.

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