A tool path optimization method for automatically generating safety cylinders for tire molds

A tire mold and tool track technology, applied in simulators, program control, instruments, etc., can solve the problems of high tool lift, inaccurate results, cumbersome process, etc., and achieve the effect of reducing the height of tool lift and solving the effect of too high tool lift

CN108021098BActive Publication Date: 2019-07-19HUAZHONG UNIV OF SCI & TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-07-19

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Abstract

The invention belongs to the field of tool path optimization, and specifically discloses a tool path optimization method for automatically generating a safety cylinder of a tire mold. The method comprises the steps of triangulating a CAD model of a tire mold, and obtaining initial coordinates of three vertices of all triangular slices on the surface of the tire mold, thus obtaining initial coordinates of N vertices in total; establishing a standard coordinate system, and converting the obtained initial coordinates of the N vertices into the standard coordinate system; establishing a target coordinate system according to the standard coordinate system and by combining characteristics of the mold; finding two arc boundaries according to the target coordinate system, and then obtaining the center of circle of the two arcs according to points on the boundaries, so as to determine the axis and radius of a safety cylinder; building a safety cylinder based on the axis and radius of the safetycylinder; and reducing the part where a cutter is lifted too high in the tool path to the surface of the safety cylinder to optimize the tool path. The method of the invention can effectively improvethe machining efficiency and ensure the machining precision, and has the advantages of convenience in operation, strong applicability and the like.
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Description

technical field

[0001] The invention belongs to the field of tool track optimization, and more specifically relates to a tool track optimization method for automatically generating a safety cylinder of a tire mold. Background technique

[0002] Molds are an essential part of industrial production, and the processing quality of tire molds directly affects the overall performance of the car. Tire mold is the molding equipment on the tire production line, which is a very important part of automobile production. It directly affects the molding of patterns, fonts, patterns and other appearance features on the tire, and also affects the overall performance of the automobile.

[0003] At present, many enterprises mainly use multi-axis CNC machining in the production of tire molds. In the multi-axis CNC machining of tire molds, the tool path generated by CAM software generally has the problem of too high tool lift. There are two main reasons for the problem of too high lift in tir...

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Embodiment Construction

[0066] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0067] Such as figure 1 As shown, the embodiment of the present invention provides a tool path optimization method for automatically generating a tire mold safety cylinder, which includes the following steps:

[0068] (1) Triangulate the CAD model of the tire mold, that is, convert the CAD model of the tire mold into STL format (a file format of triangular grid), and then obtain the initial coo...