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Digitization modeling and CNC machining for enveloping surface parts

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Abstract

Nowadays, the demand for high-quality enveloping surface parts is increasing in machinery, aviation, military, and many other fields. Given the complexity of the surfaces, the enveloping surfaces parts are usually processed by grinding method. This grinding process is low in precision and poor in efficiency for lack of accurate digital CAD model of these parts. In this paper, a new modeling method for the complicated enveloping parts has been developed. The digital CAD model is constructed by using vector representation, transformation matrix, and spatial meshing theory. Next, a better computerized numerical control (CNC) machining code is generated based on the accurate digital CAD model, and a high-quality envelope surface could be machined on the basis of the code in CNC machining center. The normal vector algorithm is adopted to detect and avoid collision and interference during the processing. Finally, the digital CAD models of a planar double-enveloping worm and worm wheel famous at difficulty in modeling and CNC machining have been conducted as an instance. The machining experiment results show that the machining precision of the enveloping surface parts have been increased because the part’s digital CAD model is extraordinarily accurate.

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Authors and Affiliations

  1. School of Mechanical and Electronic Engineering, Wuhan University of Technology, Wuhan, China

    Hong Lu & Zhi Liu

  2. Southeast Missouri State University, Cape Girardeau, MO, 63701, USA

    Shaojun Wang

Authors
  1. Hong Lu
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  2. Zhi Liu
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  3. Shaojun Wang
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Correspondence to Zhi Liu.

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Lu, H., Liu, Z. & Wang, S. Digitization modeling and CNC machining for enveloping surface parts. Int J Adv Manuf Technol 73, 209–227 (2014). https://doi.org/10.1007/s00170-014-5777-8

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  • DOI: https://doi.org/10.1007/s00170-014-5777-8

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