The Characteristics and Causes of Push-off During Screw Rotor Manufacture, and its Compensation by Multi-axis Machine Path Calculations

9th International Conference on Compressors and their Systems

Wang, X.^1 ; Holmes, C.S.^1

PTG Holroyd Advanced Developments, Harbour Lane North, Holroyd, Rochdale

OL16 3LQ, United Kingdom^1

关键词: Contact lines;    Contact paths;    Depth changes;    Head angle;    Multiaxis machines;    Profile error;    Push offs;    Screw rotor;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/90/1/012013/pdf
DOI  :  10.1088/1757-899X/90/1/012013

来源: IOP

【 摘 要 】

When grinding helical components, errors occur at the beginning and end of the contact path between the component and grinding wheel. This is due to the forces on the component changing as the grinding wheel comes into and out-of full contact with the component. In addition, shaft bending may add depth changes which vary along the length. This may result in an interrupted contact line and increased noise from the rotors. Using on-board scanning, software has been developed to calculate a compensated grinding path, which includes the adjustments of head angle, work rotation and infeed. This grinding path compensates not only lead errors, but also reduces the profile errors as well. The program has been tested in rotor production and the results are shown.