Design of Formed Milling Cutter for Double-Helix Screw Based on Noninstantaneous Envelope Method | Zendy

Yun Li | Zendy; Jinwei Fan | Zendy; Xiaofeng Wang | Zendy; Liu Yong-jun | Zendy

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Design of Formed Milling Cutter for Double-Helix Screw Based on Noninstantaneous Envelope Method

Author(s) -

Yun Li,

Jinwei Fan,

Xiaofeng Wang,

Liu Yong-jun

Publication year - 2013

Publication title -

advances in mechanical engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.318

H-Index - 40

eISSN - 1687-8140

pISSN - 1687-8132

DOI - 10.1155/2013/431919

Subject(s) - helix (gastropod) , milling cutter , helix angle , coordinate system , machining , envelope (radar) , position (finance) , mechanical engineering , process (computing) , mechanism (biology) , engineering drawing , geometry , materials science , engineering , computer science , mathematics , physics , ecology , telecommunications , radar , finance , quantum mechanics , snail , economics , biology , operating system

The design theory and method of formed milling cutter for double-helix screw of progressing cavity pump are presented. Through analyzing the shape and characteristic parameters of double-helix screw, the helicoids equation and axial curve equation of double-helix screw were established. According to the relative position relations between formed milling cutter and double-helix screw in the machining process, the geometric mapping relationship of screw coordinate system and formed milling cutter coordinate system was established by using the coordinate transformation theory. Based on noninstantaneous envelope method and the meshing conditions between formed milling cutter and double-helix screw, the contact line equations were established by minimum value method. By analyzing the machining errors caused by resharpening the formed milling cutter, the tooth back curve equation was established based on spiral of Archimedes, and the profile equation of formed milling cutter with constant back angle was got. On this basis, the formed milling cutter of processing double-helix screw was designed, and the cutter head and tool post were manufactured, respectively. The measuring results have shown that this method can satisfy the requirements of machining accuracy for double-helix screw. So this is an effective method to get formed milling cutter profile for double-helix screw

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