Plum blossom head tic-tac-toe line marking method

Abstract

The invention discloses a wobbler crisscross line scribing method. Not only can an Rb processing line be accurately and quickly determined through a linear position limiting method, but also the processing scribing quality and the position degree are improved. According to a relation formula that T is equal to 0.7071Rn-0.5858Rb, the numerical value of T is calculated to scribe an excircle center line. Then, two straight lines are planned by scribing and extend to an excircle of a roller shaft head. Another center line and two corresponding straight lines are scribed on the roller shaft head and extend to the excircle of the roller shaft head. The position of an Rb center point is scribed through two vertical lines of a crisscross line, and then the Rb processing line is scribed. The wobbler crisscross line scribing method has the beneficial effects that the position of a circular arc is firstly positioned by the straight lines through the crisscross line to be conveniently, easily and accurately scribed; the processing correctness and the processing accuracy of the width of a processed residual roller can be directly measured and detected with a caliper, so that the qualified rate of the position degree of a wobbler of the processed roller is high; and moreover, the sample cost is eliminated, and the production cost is reduced.

Description

technical field [0001] The invention relates to a mechanical processing method, in particular to a scribing method of a plum blossom head in the processing technology. Background technique [0002] In the traditional plum blossom head processing method, it is necessary to divide the shaft head of the workpiece to be processed equally and then process 4 arc cutting grooves with a radius of Rb. The processed shaft head is generally called a plum blossom head. When an arc cutting groove with a radius Rb is used, since the radius Rb of the cutting arc and the radius of the inscribed circle Rn are small, a straight line needs to be drawn to extend the radius Rb of the cutting arc to the outer circle, and this specific plum blossom head is called It is a crosshead; before processing the torx head and the crosshead, it is necessary to scribe the shaft head of the workpiece to be processed. At present, the conventional scribing methods are the "model scribing method" and the end fac...

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Problems solved by technology

[0002] In the traditional plum blossom head processing method, it is necessary to divide the shaft head of the workpiece to be processed equally and then process 4 arc cutting grooves with a radius of Rb. The processed shaft head is generally called a plum blossom head. When an arc cutting groove with a radius Rb is used, since the radius Rb of the cutting arc and the radius of the inscribed circle Rn are small, a straight line needs to be drawn to extend the radius Rb of the cutting arc to the outer circle, and this specific plum blossom head is called It is a crosshead; before processing the torx head and the crosshead, it is necessary to scribe the shaft head of the workpiece to be processed. At present, the conventional scribing methods are the "model scribing method" and the end face "drawing scribing method". The “scribing method” needs to make a template with the same shape and size as the end face, which greatly increases the process cost; the “drawing and scribing method” of the end face is mostly outside the workpiece to be processed because the center position of the radius Rb of the cutting arc is mostly outside the workpiece to be processed. It is difficult to determine the position accuracy, resulting in the reduction of marking accuracy, resulting in poor indexing of the processed workpiece, which affects assembly and use

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