基于曲面插值算法的径向搅拌摩擦增材修复形状控制技术

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Abstract： During the radial stirring friction additive repair process，the excessive gap between the contour channels fects the positioning effect of the control points on the surface of the additive repair，making it difficult to confirm changes in height，width，and tiltangle.Therearealso problemswith significant differences in the shape and contour of the repair area，as well as poor flatness.Therefore，a radial stiring friction additive repair shape control technology based on surface interpolation algorithm is proposed.Calculate the additive heat input and flow velocity duringterepair processof thearea toberepaired，calculatetheheight，width，andtiltanglechangesof therepair area，and analyze the shape change pattern of the area to be repaired.Apply surface interpolation algorithm to calculate the weight factorvalues of therepaired shape，constructasurface model，setthe interpolation function，and filter the specific control points of the repaired shape based on the shape of the area to be repaired.Based on control points，design a shape controler and combine it with a thermal cycle optimization function to achieve shape control for radial stiring friction additive repair.The experimental results show that after shape control repair treatment，the defectholes are notonlyfilledflat，but thesurfaceis alsosmoother.Thestraightnesstolerance valueof themodified shape isrelatively small，and the shapeof therepair area isbasically consistent with thecontourof the set repair area.The average contour is O.93，and thesurface flatness is O.96，which canaccuratelycontrol the shapeof the radial stirring friction additive repair.

Keywords： surface interpolation algorithm; radial mixing tool; friction additive repairarea; shape control; repair the pattern of shape changes; interpolation function

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金属部件的机械连接孔常因磨损、腐蚀等出现尺寸超差问题，影响结构服役的安全性与可靠性。（剩余5888字）