A method for generating a spherical milling cutter tool track for researching and matching profiles of automobile panel molds

Abstract

The invention discloses a method for manufacturing a spherical milling cutter rail of an automobile covering part mold grinding profile. The method comprises the following steps of firstly, generatinga numerical control machining cutter rail on a design model, and acquiring coordinates of a cutter center point and a cutter contact point through a cutter rail file; then, acquiring the thickness distribution of a formed part and the thickness value of each node through stamping simulation calculation, and calculating an intersection point of a connection line between the cutter center point andthe cutter contact point and a grid model of the formed part; and finally, calculating the thickness of the intersection point according to the coordinate of each node and the thickness value interpolation value of an unit in which the intersection point is located, and moving the cutter center point and the cutter contact point to form a novel numerical control machining cutter rail. According to the method, the grinding rate of a mold profile can be effectively improved, the mold manufacturing efficiency can be improved, and the mold manufacturing cost can be reduced.

Description

technical field [0001] The invention relates to the field of surface processing of researched and matched profiles of automobile cover parts, in particular to a method for generating a spherical milling cutter track for developing and matching profiles of molds of automobile cover parts. [0002] technical background [0003] During the drawing forming process, the sheet material will be thinned or thickened due to plastic deformation, and this thickness change is not uniformly distributed in each area of ​​the formed part. In order to improve the forming quality and reduce the local stress of the mold surface during stamping, it is necessary to repeatedly correct the mold surface according to the actual thickness change of the drawn formed part until the mold surface can be completely matched with the formed surface of the part when the mold is closed. Fitting, this kind of bonding degree is called "grinding rate" or "grinding ratio" in the drawing forming process, and gener...

AI Technical Summary

Problems solved by technology

The above method is aimed at the NC program that can only output the tool position point but not the tool contact point. In the solution process, it is necessary to construct an accurate mold grid model through grid mapping. The construction method is complicated, and it is easy to generate errors during the construction process. Affects the research ratio of the final mold surface

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