Cam fillet milling optimization design method for camshaft

Abstract

The invention provides a cam fillet milling optimization design method for a camshaft. The cam fillet milling optimization design method comprises the following steps: carrying out milling by adopting an alloy end mill with a certain cutter blade radius, and adopting a layer-by-layer circular arc progressive mode; calculating the contact area between a cutter and a processing circular arc, and controlling a cam fillet by adjusting the contact area; and performing trial production, feeding back a result, and selecting an optimal scheme. According to the cam fillet milling optimization design method provided by the invention, the limitation of the cam fillet optimization design of a large fillet of the engine camshaft is reduced, the maturity of a processing method is improved, and the one-time success of the process method design is guaranteed, so that the effectiveness of optimization design calculation is improved.

Description

technical field [0001] The invention belongs to the field of camshaft processing, and in particular relates to an optimal design calculation method for cam fillet milling of camshafts. Background technique [0002] The general optimization design calculation scheme for cam fillet milling is: when using an end mill to mill a cam fillet, the size of the fillet is determined by the fillet size of the blade installed in the tool (how much is the fillet of the blade, and the fillet of the cam after milling is also How much), to optimize the design, it is only to develop a variety of plans (by changing the cutting parameters such as the feed rate and feed speed of the tool) and the processing sequence, and find the most suitable processing parameters to ensure the size requirements of the cam fillet. [0003] Ordinary cam processing rounds are small, relying on tool rounds to be directly milled into shape, its processing technology is relatively general and mature, and the wear an...

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Problems solved by technology

[0004] However, for parts that require a large R value of the cam fillet and high machining accuracy, due to the large fillet and high precision requirements, the processing plan has a certain uniqueness and originality, and there is no mature reference for it. scheme, which makes it more difficult to process, and the R value of the fillet cannot be effectively guaranteed

If the blade nose radius is used to make the corresponding radius value, the cutting resistance will increase sharply during machining due to the excessively large radius of the knife nose arc, which will lead to faster wear of the blade, and will directly cause the phenomenon of knife beating, resulting in the processing of tools and processed products. scrap parts

[0005] Therefore, for the milling method of the large cam fillet of the engine camshaft, the original optimal design method has certain limitations

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