A method for processing narrow-groove impellers, a grinding head and a preparation method thereof

Abstract

The invention provides a method for machining a narrow groove system impeller, a grinding head and a preparation method of the grinding head. The grinding head is a cylinder. The top end of the grinding head is in the shape of a spherical surface, and a spiral groove is formed in the side wall of the grinding head. The preparation method includes the steps that materials for use are calculated; ingredients are weighed; wetting and material mixing are performed; pressing of grinding head sand blocks is performed; drying is performed; the firing link is performed; and the grinding head sand blocks which are qualified through checking are selected and enter an adhesion processing procedure of a cutter handle, the cutter handle is bonded, after adhesives are cured and stabilized, laser dressing is performed, grooving is performed, and acceptance check of the grinding head is performed, and therefore preparation of the grinding head is completed. The method for machining the narrow groove system impeller through the grinding head includes the steps that fluttering stability analysis is performed, and a stable lobe graph of a grinding system is established; the technological parameter selecting range of stable grinding is determined; and technological parameters of stable grinding are selected, and the grinding head is installed for grinding machining. By means of the grinding head, the grinding temperature is effectively lowered, the adhesion and abrasion effects of cuttings on the grinding head are reduced, the machining surface burning problem is reduced, and better machining surface quality is acquired.

Description

technical field [0001] The invention relates to the technical field of numerical control machining, in particular to a method for machining an impeller with a narrow groove system, a grinding head and a preparation method thereof. Background technique [0002] With the advancement of science and technology, people have higher and higher requirements for the precision of products. Improving the surface quality of the impeller, which is a crucial part in automobile engines and aero-engines, is an important problem that needs to be solved urgently. [0003] The traditional grinding process mainly uses the grinding wheel to process the surface of the workpiece, but for the workpiece with a complex and narrow groove system (the groove width is generally less than 20 ~ 30mm), due to the relationship between the size, the traditional grinding wheel is difficult to process, and can only use Small diameter grinding head to process it. However, the traditional grinding head often has...

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Problems solved by technology

[0003] The traditional grinding process mainly uses the grinding wheel to process the surface of the workpiece, but for the workpiece with a complex and narrow groove system (the groove width is generally less than 20 ~ 30mm), due to the relationship between the size, the traditional grinding wheel is difficult to process, and can only use Small diameter grinding head to process it

However, the traditional grinding head often has a large grinding force and high grinding temperature during processing, which not only causes burns on the processed surface, but also easily causes chips to stick to the surface of the workpiece and the grinding head, which not only increases tool wear, but also Reduced accuracy of machined surfaces

[0004] In addition, due to the thin-walled surface of the impeller is thin and easy to deform, if the process parameters are selected unreasonably, vibration marks will often be left on the surface of the workpiece, resulting in low surface quality.

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