A design method for the shape and size of the generatrix of a drum tool
A design method and tool technology, applied in the direction of electrical program control, digital control, etc., can solve the problem that the establishment of a tool database is not very suitable, and achieve the effect of shortening the processing time, reducing the quantity and reducing the production cost.
Active Publication Date: 2016-05-04
BEIHANG UNIV +1
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Problems solved by technology
[0010] Since the drum cutter is a non-standard serialized cutter, it is not very suitable to establish a cutter database in the prior art 3
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[0040] See Figure 1-5 , a drum-shaped tool design method for complex curved surface processing of the present invention, the tools involved in the present invention are all designed under the assumption that the length of the tool is known, and the specific implementation steps are as follows:
[0041] Step 1: Initialize the tool: If the tool is optimized for the first time, the tool generatrix can be designed as a circular arc, and its radius is equal to the minimum curvature radius of the surface according to the principle of maximum main curvature matching; otherwise, the initial tool is set to the one after the last optimization Tool; Sampling knife contact: Select the point on the surface that is most representative of the geometric properties of the surface as the knife contact, and perform tool optimization at this point. The present invention has only taken 9 knife contacts C 1 、C 2 、C 3 ,...,C 9 (Such as figure 1 shown), which basically covers the entire curved ...
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The invention provides a method for designing the shape and the size of the generatrix of a drum cutter. The method comprises the steps that firstly, the drum cutter is initialized, and cutter contact points are sampled; secondly, the position posture of the cutter is adjusted at each cutter contact point, discretization is conducted on the cutter in the latitudinal direction, so that a series of latitudinal circles are obtained, and the shortest line between each latitudinal circle and a curved surface is obtained; thirdly, fitting is conducted on perpendicular foot points on the curved surface of the shortest line, obtained in the second step, between each latitudinal circle and the curved surface, so that a curved line is obtained, the curved line is made to rotate around a cutter shaft, and therefore a new cutter is generated; fourthly, the first step, the second step and the third step are conducted on each sampled cutter contact point on the designed curved surface, so that generatrixes are obtained, the number of the generatrixes is equal to that of the cutter contact points, as a result, a series of cutters are obtained, enveloping is conducted on the cutters so that an intersection can be obtained, the optimal generatrix of the cutter is obtained, and therefore a cutter suitable for machining the whole curved surface is generated; fifthly, the cutter obtained in the step four is used as an initial cutter for next cutter optimization, the first step, the second step, the third step and the fourth step are repeated until the iteration requirement is met, and then iteration is ended.
Description
technical field [0001] The invention relates to a tool design method, in particular to a design method for the shape and size of a drum-shaped tool generatrix, and belongs to the field of tool design. Background technique [0002] The optimal selection of tools mainly includes the selection of tool geometry and the determination of tool size parameters. In the process of complex curved surface processing, choosing the right tool can reduce the number of tool paths and effectively improve the processing efficiency. Therefore, optimizing the selection of cutting tools is one of the effective means to shorten the processing time and thus reduce the processing cost. [0003] At present, when surface finishing, there are generally three methods for selecting tools with a wide range of applications: [0004] Existing technology 1: According to personal experience, select conservative and feasible tool parameters; [0005] Existing technology 2: According to the principle of mat...
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IPC IPC(8): G05B19/19
Inventor 陈志同张春吴献珍徐义平
Owner BEIHANG UNIV