Method for adjusting tooth surface contour of spiral bevel gear based on topological graph

Abstract

The invention discloses a method for adjusting the tooth surface contour of a spiral bevel gear based on a topological graph. The error adjustment amount of a deviation reference tooth surface is defined as an Ease-Off value, and a corresponding error curved surface is called as an Ease-Off tooth surface. The method comprises the following steps of: constructing a theoretical model of the spiral bevel gear based on a cradle type machine tool; calculating a tooth profile error sensitive value of a machine tool adjustment parameter; calculating the Ease-Off tooth surface based on the tooth profile error sensitive value, and constructing a target tooth surface according to the Ease-Off tooth surface; and calculating a basic machine tool adjustment parameter according to the tooth profile error sensitive value and the target tooth surface in order to adjust the tooth surface contour. During gear machining, the theoretical model and the Ease-Off tooth surface based on the machine tool adjustment parameter are constructed, and the target tooth surface of the theoretical model is reconstructed and adjusted according to the Ease-Off tooth surface, so that relevant machining requirements can be met, the smoothness and continuity of the target tooth surface are ensured, the defects of a conventional machining way are overcome, and high practicability is achieved.

Description

technical field [0001] The invention relates to a gear processing method, in particular to a method for adjusting the tooth surface profile of a spiral bevel gear based on a topological graph. Background technique [0002] For a long time, there are two main processing methods for spiral bevel gears: generating method and non-generating method. [0003] The generating method mainly includes the face milling method of single tooth indexing and the face hobbing method of continuous indexing. For face milling generation method, at each instant, the cutter head cuts into the tooth depth position of the workpiece, and the rotating surface of the cutter head follows the swing of the cradle to form a spatial production surface, and the production surface and the workpiece follow the predetermined position Make a "cutting" motion. In the process of processing with the cradle-type machine tool structure, the cradle can be regarded as an imaginary generating wheel, the axis of the c...

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Problems solved by technology

It is generally considered that the complete tooth surface of the tool modification includes the top modification surface, the working tooth surface, the tooth root modification surface, the transition fillet surface and the alveolar surface. For the working tooth surface corresponding to the cutting edge, the traditional tooth surface profile There are mainly the following methods to obtain the target tooth surface: one is to measure or directly compensate the tooth profile adjustment to the original tooth surface, such as the determination of the standard tooth surface, the direct superposition of the pre-compensated tooth surface error, etc. In the process of measurement or processing, the tooth surface itself is not necessarily continuous, and there are burrs or bumps, resulting in measurement errors. Direct superposition will also affect the smoothness and continuity of the target tooth surface, resulting in defects in the target tooth shape; The target tooth profile correction in the differential field, although this method achieves the purpose of smoothing, it is effective for the tooth profile correction near the calculation point, but the control of the tooth profile in the area far away from the calculation point may not be able to meet the requirements , e.g. contact zone adjustment based on the reference point makes it difficult to compensate for tooth flank edge engagement or engagement shocks

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