公开(公告)号：US20200249130A1

公开(公告)日：2020-08-06

申请号：US16470925

申请日：2019-02-21

Applicant: Dalian University of Technology

Inventor： Kuo LIU ,  Yongqing WANG ,  Haibo LIU ,  Xu LI ,  Mingrui SHEN ,  Mengmeng NIU ,  Ziyou BAN

IPC: G01M99/00 ,  F16C25/06

Abstract: A method for determining the preload value of the screw based on thermal error and temperature rise weighting. Firstly, thermal behavior test of the feed shaft under typical working conditions is carried out to obtain the maximum thermal error and the temperature rise at the key measuring points in each preloaded state. Then, a mathematical model of the preload value of the screw and the maximum thermal error is established; meanwhile, another mathematical model of the preload value of the screw and the temperature rise at the key measuring points is also established. Finally, the optimal preload value of the screw is obtained. The thermal error of the feed shaft and the temperature rise of the moving components are comprehensively considered, improving the processing accuracy and accuracy stability of the machine tool, and ensuring the service life of the moving components such as bearings.

公开(公告)号：US20210347000A1

公开(公告)日：2021-11-11

申请号：US16972278

申请日：2020-02-28

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Yongqing WANG ,  Ziyou BAN ,  Kuo LIU ,  Lingsheng HAN ,  Fanze KONG ,  Siqi WANG

IPC: B23Q11/10 ,  B23Q3/12

Abstract: The invention provides a tool holder suitable for cryogenic minimum quantity lubrication, which belongs to the technical field of cooling and lubrication of numerical control machine tools. The device comprises a toolholder body, a peripheral static structure, a multilayer sealing structure, a heat insulation structure, and a bearing support structure. The invention solves the problems of insufficient cooling performance in the micro-lubrication technology and insufficient lubrication in the cryogenic cooling machining technology, and integrates the oxygen insulation protection effect of the cryogenic medium, the cooling effect of the cryogenic medium, and the friction reduction and lubrication effect of the micro-lubrication. It has a good processing effect on difficult-to-cut materials. The invention can be used for machining difficult-to-cut materials with traditional numerical control machine tools, expands the application range of external to internal cooling tool holders, effectively reduces the cutting heat of difficult-to-cut materials in cutting processing, improves tool life, and replaces traditional cutting fluids to achieve green manufacturing.