Hob design method

Abstract

The invention provides a hob design method. The hob design method is characterized by including the following steps: (1) a tooth form is drawn; (2) a tau / n array is made in an angular pitch tau to obtain n+1 tooth-shaped curves; (3) a number 1 curve is horizontally moved at the distance of t / n to arrive at a P point along the X axis direction, then a number 2 curve and the number 1 curve are horizontally moved at the distance of t / n to arrive at the P point along the X axis direction, and so on, finally a number n+1 curve, a number n curve, a number n-1 curve...... a number 3 curve, the number 2 curve and the number 1 curve are all horizontally moved at the distance of t / n to arrive at the P point along the X axis direction to obtain a gear tooth-shaped envelope curve; (4) a symmetrical envelope curve of a hob tooth-shaped curve is obtained through images; and (5) an arc or a straight line is used for replacing the envelope curve to perform correction so as to obtain a complete hob tooth-shaped curve. The hob design method is based on a gear meshing principle, achieves hob tooth-shaped design by adopting a pure mapping method, and is simple, visual and high in design accuracy. The tooth form of a hob can be changed at any time in a mapping process according to process requirements of following processes. The hob design method is optimized continuously and enables design of the hob to be convenient and reasonable.

Description

technical field [0001] The invention relates to a design method of a hob, in particular to a method for realizing the tooth shape design of a hob based on a drawing method. Background technique [0002] In the mechanical transmission mechanism, parameters such as gear shape, precision and angular pitch are very important data and indicators in gear transmission. The selection of these parameters directly affects the performance and quality of gear transmission, and is directly related to the quality of gear transmission products. Technical indicators even affect the quality of the entire product. [0003] At present, the hobs commonly used to realize gear tooth profile processing are generally designed by calculation methods. This method needs to apply cumbersome and complicated formulas in the design, and calculate a large amount of data, and the selection of many data in the calculation process is obtained by experience. , such data selection cannot guarantee the rational...

AI Technical Summary

Problems solved by technology

[0003] At present, the hobs commonly used to realize gear tooth profile processing are generally designed by calculation methods. This method needs to apply cumbersome and complicated formulas in the design, and calculate a large amount of data, and the selection of many data in the calculation process is obtained by experience. , such data selection cannot guarantee the rationality of the calculation results. Once the results deviate or the calculation data is unreasonable, it needs to be recalculated, which is time-consuming and laborious; another commonly used hob design method is the drawing method, but the existing The drawing method in the technology usually needs to calculate the coordinates of the center of the gear arc first, and then connect the centers to obtain the tooth profile curve through drawing. Although this drawing method is relatively simpler than the design process of the calculation method, it is still It is necessary to calculate the coordinates of the center of the gear arc first, or to use some design calculation formulas, which makes it impossible to change the hob tooth profile immediately during the design process, and the hob is not intuitive during the actual processing process. The design efficiency of the knife is low, so it needs to be further improved

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