Views: 0 Author: Site Editor Publish Time: 2022-08-22 Origin: Site
The research on gear measurement technology and its instruments has a history of nearly a hundred years. In this long development process, there are 6 landmark events:
1. In 1923, the German Zeiss company successfully researched an instrument called "Toooth Surface Tester" for the first time in the world, which is actually a mechanically developed universal involute checker. After improvement on this basis, Zeiss introduced the practical instrument in 1925 and put it on the market. The length reference of the instrument uses an optical glass line ruler with a line spacing of 1 micron. The advent of this instrument marks the beginning of gear precision measurement. VG450, which is widely used in my country, is an improved product of this instrument.
2. In the early 1950s, the appearance of mechanically developed universal helical standard instrument marked the realization of comprehensive control of gear quality.
3. In 1965, Dr. R·Munro of the United Kingdom successfully developed a grating single-mesh meter, which marked the possibility of high-precision measurement of the dynamic performance of gears.
4. In 1970, the overall error measurement technology of gears was developed by Chinese engineering and technical personnel mainly by Huang Tongnian, which marked the beginning of the measurement of gears by kinematic geometry method.
5. In 1970, American Fellow Company exhibited Microlog50 at the Chicago Expo, marking the start of the CNC gear measurement center.
6. In the late 1980s, Japan's Osaka Seiki launched the non-contact tooth surface analyzer PS-35 based on the principle of optical holography, marking the beginning of the gear non-contact measurement method.
In the nearly 50 years before the 1970s, various types and specifications of mechanical generating instruments for measuring basic parameters such as tooth profile, helix, and tooth pitch have been developed in the world. These instruments use some precision mechanisms to form a specified standard motion, and then compare with the measured to obtain the size of the measured error.
1970 was a turning point in gear measurement technology. The emergence of the gear overall error measurement technology and the gear measuring machine (center) solves a difficult problem in the field of gear measurement, that is, to quickly obtain all the error information of the gear on one instrument. Although these two technologies are based on modern optical, mechanical, electrical, computer and other technologies, they have embarked on different technical routes.
The overall error measurement technology of gears is to extract the single error and other useful information from the comprehensive measurement. After 30 years of improvement and promotion, the overall error measurement method of gears has developed into a traditional motion geometry measurement method in my country. The basic idea is to use the measured object as a rigid functional element or transmission element to mesh with another standard element Motion, by measuring the meshing motion error to inverse the measured error.
The distinctive feature of the kinematic geometric measurement method is that it vividly reflects the gear meshing transmission process and accurately reveals the variation law of the gear single error and the relationship between the errors, which is especially suitable for gear technology error analysis and dynamic performance prediction. The advantage of an instrument using this method is that it has high measurement efficiency and is suitable for part inspection in mass production.
Since 1990, worldwide, several notable phenomena have emerged in the field of gear measurement technology:
1. The overall gear error measurement technology and the gear coordinate measurement technology are combined into one. The Chengdu Tool Research Institute has launched a gear measuring machine CZN450 with both a standard worm and a probe, and foreign CNC gear measuring centers can also give "virtual overall error".
2. The gear measuring center and the CMM are combined into one, such as the Rdaiance of the American TSK Company and the ND430 of the Process Equipement Company.
3. The function test and the sub-test are combined into one. Simplified measurement is one of the development trends of gear measuring instruments. The gear overall error measuring instrument is accepted by the gear manufacturing industry because it can efficiently give the full information of the gear.
