Research on NC Enveloping Machining for Complex Inner Spiral Surface


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The key parts are the stator and the rotor to realize the function of single screw hydro-mechanical. Along with the further improvement of performance requirement of mechanical product, it’s obvious that the general screw mechanical with rubber bushing stator can’t meet the requirement. So the process technology of inner helical curved surface with metal stator becomes the key technology to improve the screw mechanical property in the world. Considering the special structure of single-screw pump stator bush, a new method enveloping boring without instantaneous velocity center was presented in this paper. Based on motion principle of screw bush pairs and practical theory of enveloping boring without instantaneous velocity center, this method realizes the boring machining for inner spiral surface of stator on NC machine. In this paper, the motion regular pattern of screw in bush was studied, and the basic principle of enveloping boring without instantaneous velocity center was represented. In the end, the feasibility of this method was proved. The new method provides a theoretical basis for the machining of stator inner helical curved surface and the development of machine tool.



Edited by:

Honghua Tan




X. W. Sun et al., "Research on NC Enveloping Machining for Complex Inner Spiral Surface", Applied Mechanics and Materials, Vols. 29-32, pp. 1828-1831, 2010

Online since:

August 2010




[1] X. T. Han, X. l. Wang, and Z. Q. Jiao. The principle and application of petroleum production screw pump, Harbin Engineering University Press, 1998, pp.12-15.

[2] K. Wang, G. Feng., X. W. Sun. Study on the New Type Stator Manufacturing Technique of Single Screw Pump, Proceedings of ICMEM2007, pp.1719-1722, November (2007).

[3] Ryazantse. V.M. single-screw high-pressure pump with multiple-thread working members, BecTΗTИЯ MaumИHocTpoeИHЯ. pp.158-161, May (2002).

[4] D. H. Jiang. Summary of near development of foreign screw pump, Pump Technology, pp.36-40. April (1992).

[5] K. Wang, W. Z. Zhao, Z. J. Tang, et al. Machining Technology Research on Non-Instantaneous-pole Envelope of Special Spiral Rod, CHINA MECHANICAL ENGINEERING, pp.294-297, March (2001).

[6] K. Wang, W. Z. Zhao, Z. J. Tang. Principle and Practice on Milling Special Shaped Spiral Rod with Non instantaneous pole Envelope Method, Manufacturing Technology & Machine Tool, pp.37-38, February (1999).

[7] X. W. Sun, H. J. Li, P. Zhang, et al. Optimal design of tool parameters for machining helical surface according to the method of spatial arc approach, JOURNAL OF SHENYANG UNIVERSITY OF TECHNOLOGY, pp.365-367, 375, April (2007).

[8] K. Wang, G. J. Wei, Z. W. Bai. CNC Milling for Screw with Inner Whirlwind Non-Instant Center Envelope, Manufacturing Technology & Machine Tool, pp.61-63, May (2004).