Manufacturing method of small sized compression impellor

Abstract

This invention is a small compression impellor manufacturing method. First, big excircle, big end face and hole are processed through small end excircle is clamped and is relied on advection road plane. Secondly, big excircle is clamped by three claws and big end face is done to plane to process meridian plane and small end face, all procedures are finished. The consistency of small end excircle and passage is fully used in the first processing to make position reference coincide design reference, so the processing error brought from non coincidence of reference in traditional technique is effectively avoided, and the passing percent is raised to more than 97%. The advantages are simple technology, low cost and high production efficiency.

Description

technical field [0001] The invention relates to a method for manufacturing a compressor impeller of a supercharger, in particular to a method for manufacturing a small compressor impeller. Background technique [0002] Ordinary technicians in the same industry know that the smaller the compressor impeller, the more difficult it is to process. In addition, the speed of the supercharger itself is quite high. Therefore, the control of the unbalance of the processed parts becomes very critical. If the unbalance exceeds If it is poor, it will cause the supercharger to rub, burn the bearing, leak oil, break the shaft, etc., which will cause the diesel engine to fail to work. Due to the characteristics of the supercharger, the dimensional accuracy and shape and position tolerance accuracy required by the compressor impeller itself are quite high, and some require a level 4 or level 5 accuracy, so it is necessary and necessary to consider the processing method. [0003] There are f...

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Problems solved by technology

[0004] The above method has disadvantages. First of all, the positioning datum has been exchanged three times in the above process, which violates the principle of unifying the datum, resulting in an increase in the cumulative error, and the change of the center of mass due to the multiple changes of the datum, resulting in a serious overweight of the dynamic balance, and a high scrap rate. It is more than 15%; Second, the first process of the process uses the positioning of the large outer circle and aligns the large end face. In fact, the planes formed by the large end face and the flow channel are not necessarily parallel due to casting reasons, and the large outer circle is in the The center of the mold is not completely concentric with the center of the flow channel, so the reference of the subsequent process is inaccurate, the center of mass is eccentric, and the amount of dynamic balance increases, resulting in the scrapping of parts; third, the traditional process has many processes and its production efficiency is low.

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