Honing surface roughness prediction method considering oilstone yielding

Abstract

The invention discloses a honing surface roughness prediction method considering oilstone yielding, which comprises the following steps of: firstly, obtaining geometric parameters and honing process motion parameters of the surface of a honing oilstone, and finally predicting the honing surface roughness under the condition of considering grinding wheel yielding. The honing roughness is theoretically deduced according to the grinding principle, and the honing roughness of a small-diameter deep hole can be calculated by optimizing parameters through a small number of tests, so that a theoretical basis is provided for parameter selection of honing of the small-diameter deep hole, the production efficiency of enterprises is improved, and the production cost of the enterprises is reduced.

Description

technical field [0001] The invention relates to a method for predicting the surface roughness of honing, in particular to a method for predicting the surface roughness in consideration of oilstone retreat during small hole honing. Background technique [0002] Honing is a method of finishing the workpiece surface at a low cutting speed. It is a special form of grinding. It can not only remove a large machining allowance, but also improve dimensional accuracy, geometric shape accuracy and Effective way to reduce surface roughness. Honing is to use one or more oilstones (strip-shaped consolidated abrasives made of diamond or cubic boron nitride abrasives) installed around the honing head, and the oilstones are expanded radially by the expansion mechanism to press them against the workpiece. hole walls in order to produce a certain surface contact. Make the honing head rotate and reciprocate at the same time, the parts do not move, or the honing head only rotates, and the wor...

AI Technical Summary

Problems solved by technology

This model reflects the influence of the honing rod speed and reciprocating speed on the roughness, and considers that each radial feed is constant, that is, the radial feed speed is constant, which is different from the actual honing process. The whetstone will retreat, resulting in the actual radial feed The speed is not constant, therefore, it cannot reflect the effect of radial feed rate on roughness

Moreover, the model can only reflect the influence trend of processing parameters on roughness, but cannot predict the roughness value, so it can only be used for qualitative analysis and cannot be used for quantitative characterization

[0004] Especially when the diameter of the honing hole is small, due to the limitation of the structure, the honing of the small hole is mostly a single oil stone, which will cause uneven force on the expanding cone

Therefore, during the honing process, the whetstone is subjected to the normal reaction force of the workpiece, and the force on the whetstone causes the expansion cone to deform, so the whetstone retreats, which affects the actual radial feed speed, and finally causes the actual depth of cut to be smaller than the theoretical depth of cut

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