Machining method of cycloidal-tooth bevel gear

Abstract

The invention discloses a machining method of a cycloidal-tooth bevel gear. The machining method comprises the following steps: (1) determining basic parameters of a generating wheel; (2) determining the movement for forming a tooth surface of the generating wheel; (3) determining the movement for expanding the generating wheel into the gear; (4) correcting the movement for expanding the generating wheel into the gear; and (5) finishing expansion of the machined gear. Compared with the Klingelnberg method, the machining method disclosed by the invention has the advantages that the structure of a tool disc is greatly simplified, a cross-shaped sliding block mechanism is not needed and the rigidity is improved; compared with the Oerlikon method, the machining method disclosed by the invention has the advantages that a tool inclining mechanism is not needed, so that the structure of a machine tool is greatly simplified and the rigidity is improved; the cycloidal-tooth bevel gear and a quasi-hyperbolic gear are processed on a bevel gear milling machine without a tool inclining and swinging disc; the correction of the tooth surface does not cause additional adjustment of the machine tool and the tool; second-order precontrol of the position, the size and the shape of contact spots of the tooth surface can be realized; second-order precontrol of required transfer errors can be realized; and a cycloidal-teeth bevel gear pair conjugate completely on theory also can be machined.

Description

Technical field: [0001] The invention relates to the field of spiral bevel gear processing, in particular to a cycloidal bevel gear processing method. Background technique: [0002] Cycloidal bevel gears are so named because their tooth lines are extended epicycloids. This kind of gear is a contour tooth, which is processed by face-hobbing continuous indexing. There are two main processing methods for cycloidal bevel gears, namely, the split cutter head method of Klingelnberg Company in Germany, and the Spirac and Spiroflex method of Oerlikon Company in Switzerland. [0003] Cycloidal bevel gear imaginary plane forming wheel forming principle: the cutter head and the forming wheel each have a rolling circle, the movement of the cutter head relative to the forming wheel can be regarded as the cutter head rolling on the forming wheel circle For pure rolling, that is, the ratio of the diameter of the cutterhead rolling circle to the rolling circle diameter of the forming whee...

AI Technical Summary

Problems solved by technology

[0007] 1) Klingelnberg adopts a split cutter head. The inner and outer cutter teeth are respectively installed on two independent cutter bodies, which are embedded and stacked together. The eccentricity of the inner and outer cutter bodies is realized through the cross slider mechanism. The structure is extremely complicated and the design and processing are difficult.

The structure of the split cutter head and the cross slider leads to poor rigidity of the machine tool. At the same time, the split cutter head cannot perform high-speed dry cutting;

[0008] 2) Oerlikon adopts the tool tilting method to overcome the defect of "restraint", but the machine tool is equipped with a tool tilting tool rotation mechanism, the machine tool structure is complicated and the calculation and adjustment are complicated;

[0009] Both the traditional Klingelnberg and Oerlikon methods cannot directly specify the position of the contact area, and repeated trial cutting is required, and it is difficult to control the contact spots and motion curves of the gear pair

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