Development of Small Module Spiral Bevel Gears

With the promotion and development of China's manufacturing industry strategy, high-precision and efficient spiral bevel gear manufacturing mode will become the future development direction, specific to the realization link, reflected in the small modulus spiral bevel gear manufacturing digital, intelligent, green, energy-saving. Higher requirements are put forward for equipment and technology, which are mainly reflected in CNC high-precision processing machine tools, high-speed and accurate measurement equipment for gear accuracy and tooth profile measurement, accurate tooth surface anti-adjustment control based on high-order motion model, closed-loop manufacturing mode based on expert system, intelligent manufacturing mode based on big data, cloud computing dry cutting process based on coated hard alloy, etc.

It is foreseeable that the manufacturing of small modulus spiral bevel gears in the future will abandon the current production mode of rough machining and random machining. High-precision, long-life spiral bevel gears and green dry cutting technology are the mainstream of future development.

Compared with the dry cutting process of high teeth such as shrink teeth and cycloid, the processing efficiency of high teeth such as the same specification is slightly higher than that of shrink teeth, because continuous hobbing saves indexing time; secondly, when processing single-indexing arc shrink teeth, the entire cutter head cutter tooth will pass through a tooth slot. When the cutter teeth are too dense and the cutting amount is too large, it is easy to lead to insufficient chip clamping groove and the iron filings in the groove cannot be discharged, resulting in gear heating and affecting the pitch error of adjacent teeth, especially the pitch error of the head and tail teeth, which is more likely to cause tooth surface damage; The cycloid tooth profile adopts continuous hobbing. No matter how fast the cutting speed is, when there are always only two teeth in a tooth groove, the problem of insufficient chip clamping groove will not occur, and the effect of temperature change on accuracy can be ignored. In the case of batch dry cutting, the accuracy of cycloid and other high teeth will be better than that of arc shrinking teeth in terms of grade and stability. Third, the radius of curvature of the midpoint of the cycloidal tooth shovel wheel is less than the radius of the cutter head. Compared with shrinking teeth, the "conjugation" of large and small wheels is better, and the strength and service life are better. In addition, for the traditional "double-sided method" of small modulus arc contraction teeth, the large wheel can only use the generation method, and the processing efficiency is low. Especially for high-speed gear pairs, large gears have more advantages in the design and processing of the whole process of forming method.

Small modulus spiral bevel gear machine standard configuration:

(1) The machine configuration is flexible and changeable, divided into high configuration version and low configuration version.

(2) Convenient full-function processing settings;

(3) High-speed direct drive technology;

(4) can choose automatic margin distribution gauge and software (including the knife position measurement and automatic margin distribution);

(5) can choose unattended automatic loading and unloading mechanism;

(6) Self-developed cutting control processing software;

(7) various processing technologies and improvements;

(8) Comprehensive safety protection;

(9) fully enclosed protection.