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Machining method of variable-pitch screw rotor

A processing method and technology of variable pitch, which is applied in the direction of metal processing equipment, thread cutting tools, manufacturing tools, etc., can solve problems such as the inability to process variable pitch rotors, and achieve the effects of expanding processing size, reducing processing costs, and reducing production costs

Pending Publication Date: 2022-05-13
SHANGHAI QIYAO EXPANDER +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing hobbing technology can only process fixed-pitch rotors, but cannot process variable-pitch rotors

Method used

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  • Machining method of variable-pitch screw rotor
  • Machining method of variable-pitch screw rotor
  • Machining method of variable-pitch screw rotor

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Experimental program
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Effect test

Embodiment Construction

[0013] Please refer to figure 1 and figure 2 . According to the machining method of the variable pitch screw rotor according to an embodiment of the present invention, the variable pitch cutter 1 is used to process the variable pitch rotor 2, and the axial positions of the variable pitch cutter 1 and the variable pitch rotor 2 are kept fixed during processing (no axial advance The central axis of the variable pitch cutter 1 and the central axis of the variable pitch rotor 2 intersect with each other, the variable pitch cutter 1 and the variable pitch rotor 2 mesh and move at a fixed speed, the speed ratio of the variable pitch cutter 1 and the variable screw rotor 2 It is: ωc / ωr=zr / zc, ωc is the speed of the variable pitch tool 1, ωr is the speed of the variable pitch rotor 2, zc is the number of teeth of the variable pitch tool, and zr is the number of teeth of the variable pitch rotor.

[0014] The variable-pitch screw rotor described in this embodiment includes a variabl...

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Abstract

A variable-pitch screw rotor machining method is characterized in that a variable-pitch cutter is adopted for machining a variable-pitch rotor, the axial positions of the variable-pitch cutter and the variable-pitch rotor are kept fixed during machining, and the central axis of the variable-pitch cutter and the central axis of the variable-pitch rotor are staggered; the variable-pitch cutter and the variable-pitch rotor move in a meshed mode according to the fixed rotating speed, the rotating speed ratio of the variable-pitch cutter to the variable-pitch rotor is omegac / omegar = zr / zc, omegac is the rotating speed of the variable-pitch cutter, omegar is the rotating speed of the variable-pitch rotor, zc is the number of teeth of the variable-pitch cutter, and zr is the number of teeth of the variable-pitch rotor. Compared with the prior art, the machining efficiency is improved, and the machining cost is reduced.

Description

technical field [0001] The invention relates to a processing method of a variable-pitch screw rotor. Background technique [0002] Twin-screw machines include twin-screw compressors, twin-screw expanders, and the like. Among them, the screw expander uses gas pressure to generate electricity, which can improve energy utilization efficiency. Using the screw expander with variable pitch rotor to replace the conventional screw expander with equal pitch rotor can increase the maximum usable internal volume ratio from the current 4.0~6.0 to about 14.0, which can theoretically improve the efficiency of the expander by 10% to 15%. This can greatly improve product competitiveness. However, variable pitch screw rotors are usually processed by five-axis machine tools or turning-milling machine tools, which have low processing efficiency, high production costs, and relatively large restrictions on the size of the rotor. [0003] On the other hand, hobs or rollers are used when using ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23G1/04B23G1/44B23G5/08
CPCB23G1/04B23G1/44B23G5/08
Inventor 袁皓吴凯施逢委张渊李伟
Owner SHANGHAI QIYAO EXPANDER
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