Design method of a triangular spline hobbing tool
A design method, the triangular flower technology, applied to components with teeth, gear tooth manufacturing tools, gear teeth, etc., can solve problems such as the inability to meet the high-precision tolerance requirements of the workpiece tooth shape, and achieve the effect of improving machining accuracy
Active Publication Date: 2018-01-26
荆州裕德机械制造有限公司
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Problems solved by technology
But at present, the tooth shape of the traditional gear hobbing tool is an approximate involute curve with a circular arc. The tooth shape of the workpiece processed by this tool is similar to a straight surface. The angle accuracy of the triangular spline is not high (the angle accuracy is ±2°) The workpiece tooth profile can meet the requirements; but it cannot meet the high precision tolerance requirements of the workpiece tooth profile with an angle of ±0.2°
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[0037] Firstly, the tooth shape of the conjugate tool is obtained by the rack and gear meshing line method (see the attached image 3 , 4 ); establish the XOY coordinate system; take the vertex of the tooth profile surface of the workpiece as the meshing point (that is, O point), establish the XOY coordinate system (see attached Figure 5 ); draw a tooth shape circle, the tooth shape of the workpiece is a straight triangle, draw a circle tangent to the tooth shape line from the workpiece center O1, the circle is a tooth shape circle, and its radius r=R*sinγ (see attached Image 6 ). Take the workpiece center O1 as the center of the circle, and draw the meshing point circle with a radius of R, that is, the addendum circle, that is, the meshing point O (that is, the origin of the coordinates) (see attached Figure 7 ).
[0038] The meshing point circle is graduated on the meshing point circle. Starting from the meshing point O, intercept a number of equal arc segments and car...
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The invention relates to a design method for a triangular spline hobbing tool and belongs to the technical field of triangular spline machining of steering arm shafts of automobile power steering gear assemblies. A normal conjugate tooth profile is obtained by using a rack and gear engagement method so as to replace the traditional circular arc tooth profile. The problem that the requirement for a workpiece tooth profile of which the angle precision is within + / -2 DEG cannot be met because the tooth profile of the traditional hobbing tool adopts a curve of which the circular arc line is approximate to an involute, and the workpiece tooth profile machined by using the tool is approximate to a straight surface is solved; and the triangular spline hobbing tool produced by using the method can replace the traditional circular arc tooth profile tool, and the angle precision of a triangular spline is effectively improved, so that the high precision tolerance requirement for the workpiece toot profile is met.
Description
technical field [0001] The invention relates to a design method of a triangular spline gear hobbing tool, belonging to the technical field of triangular spline processing of steering arm shafts of automobile power steering gear assemblies. Background technique [0002] The triangular spline of the steering arm shaft in the existing automobile power steering gear assembly (see figure 1 ), is the use of hobbing arc cutters (see Figure II ) tooth shape to process. Since the hobbing and milling are processed by the generation method, and the tooth surfaces on both sides of the triangular spline tooth shape are straight, if the generation simulation method is used theoretically, the obtained tool tooth shape should be an involute curve. But at present, the tooth shape of the traditional gear hobbing tool uses a circular arc to approximate the involute curve. The tooth shape of the workpiece processed by this tool is similar to a straight surface, and the angle accuracy of the ...
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IPC IPC(8): B23F21/16
CPCB23F21/16
Inventor 章邦军何金根徐刚春
Owner 荆州裕德机械制造有限公司