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Processing technique of roots pump fan blade

A processing technology and Roots pump technology, applied in the field of mechanical processing, can solve the problems of small compression ratio and uneven blade clearance, and achieve the effects of avoiding uneven clearance, good geometric symmetry, high dimensional accuracy and shape accuracy

Inactive Publication Date: 2008-09-17
无锡市四方真空设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a processing technology for the fan blades of Roots pumps, which can meet the requirements of high dimensional accuracy and shape accuracy, and better geometric symmetry, so as to prevent the blades from There are problems such as uneven clearance and small compression ratio during meshing

Method used

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Embodiment Construction

[0018] Servo motors are selected for the drive of the workbench and the cutter head to realize the processing technology of the present invention, and a Siemens 802C control system is adopted.

[0019] The processing technology of Roots pump fan blade of the present invention comprises the following steps:

[0020] a. The blank inspection process of wind blades is to check whether there are casting defects such as pores, shrinkage cavities, sand inclusions, and loose structures in the blank, whether the external dimensions meet the requirements, and whether there is a machining allowance on each processing surface. The main measuring tool in this step is 0 ~150 calipers and 2M tape measure;

[0021] b. The process of milling the upper and lower two planes of the blank, that is, milling the upper and lower two planes on the qualified blank; one is to reduce the processing amount of the CNC planer; the other is to process the reference plane and prepare for the subsequent proces...

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Abstract

The invention relates to a processing technology of Roots pump fan blade, comprising testing roughcast, milling the upper and lower big surfaces of a fan blade roughcast, grinding a big surface of a fan blade roughcast as the base level, using the grinded bug surfaces as the main shaft hole and the reducing hole base fan blade, grinding the left and right ends of the fan blade roughcast, planing keyway of the fan blade roughcast, planing the shape of the fan blade rudely, making the main shaft and pressing the fan blade main shaft into the main shaft hole, planing the external circle of the upper and lower surface of the fan blade and the left and right ends rudely, grinding the upper and lower external circle of the fan blade, the left and right ends and every external circle, and planing the external circle surface of the fan blade and the left and right ends well. The processing technology has the advantages of high size precision and shape precision of the fan blade, good geometric symmetry, no small problems such as nonuniform space and small compression ration generated in meshing the fan blade.

Description

technical field [0001] The invention relates to a processing technology for fan blades of a Roots pump, belonging to the technical field of mechanical processing. Background technique [0002] Roots-type vacuum pump (Roots pump for short) is a rotary variable-capacity vacuum pump without internal compression. of. The fan blade is the key part of the pump. The gap between the fan blade and the pump chamber is 0.12-0.15mm, and the gap between the fan blade and the fan blade is only 0.15-0.2mm. If the gap is too large, it will affect the compression ratio of the vacuum pump. If the clearance is small, the pump will heat up and bite to death during work. This requires that the processed fan blades not only have high dimensional accuracy and shape accuracy, but also must have good geometric symmetry. [0003] The shape of the wind blades was originally processed on a modified planer, but the drive of the workbench and the cutter head is driven by a stepping motor. Since the con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/02
Inventor 谷军
Owner 无锡市四方真空设备有限公司
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