Method for measuring tooth profile deviation of gear based on double-side meshing

Abstract

The invention relates to a method for measuring a tooth profile deviation of a gear based on double-side meshing and belongs to a precise measuring technique and the technical field of instrument and mechanical transmission. According to the method, a rack measuring head is adopted for measuring the tooth profile deviation of the to-be-measured gear based on double-side meshing, wherein the rack measuring head only has a tooth and the tooth profile is a straight line. Four tooth sockets of each to-be-measured gear are measured. During the measuring process of each tooth socket, the rack measuring head enters the tooth socket of the to-be-measured gear and is in close contact with left and right tooth surfaces of the to-be-measured gear; the rack measuring head and the tooth socket move in a double-side meshing manner and the position of the rack measuring head is measured and obtained; and lastly, the tooth profile deviation of the to-be-measured gear is solved and obtained through a mathematical model. Specific to the requirement for on-site quick measurement of the gear, the invention provides the method for measuring the tooth profile deviation of the gear through the meshing of the rack measuring head and the to-be-measured gear based on the double-side meshing, so that the tooth profile deviations of the left and right tooth surfaces of the to-be-measured gear are simultaneously obtained through once measurement.

Description

technical field [0001] The invention relates to a method for measuring gear tooth profile deviation based on double-sided meshing, and belongs to the technical fields of precision testing technology, instruments and mechanical transmission. Background technique [0002] At present, the annual output value of China's gear industry is nearly 140 billion, ranking second in the world, of which vehicle gears account for two-thirds. The industry standard for vehicle gears in the United States states that 100% of the finished gear should be measured to meet its quality requirements. According to reports, almost all vehicle gear manufacturers in the United States are equipped with fast and high-precision gear detection systems, while the research and application in this area are almost blank in our country. [0003] Gear measurement includes: individual measurement, comprehensive measurement, and overall measurement. Single measurement includes measurement of gear tooth profile de...

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Problems solved by technology

There is no relevant literature on the measurement of gear tooth profile deviation by double-sided meshing in foreign countries

[0009] In 2008, Jin Jiaqi, Li Wenlong and others developed an on-machine measuring instrument for measuring the deviation of large gears with a single-sided engagement between the edge rack probe and the measured gear, which solved the measurement benchmark encountered in the measurement of large gears with a diameter ≥ 2.5m Difficult selection, large gear inertia, low measurement efficiency and other difficulties

The rack probe is used in this measurement, but it is meshed with the gear on one side. One measurement can only get the deviation of one tooth surface, and the left and right tooth surfaces cannot be measured at the same time. To measure the left and right tooth surfaces, it is necessary to re-align the probe, re-install

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