A method for measuring cutting error of flexible gears for harmonic reducers
A technology of harmonic reducer and flexible gear, applied in machine gear/transmission mechanism testing, measuring devices, instruments, etc., can solve problems such as difficulty, low efficiency, unstable measurement process, etc., and achieve the effect of reducing positioning error
Inactive Publication Date: 2017-07-14
CHANGZHOU UNIV
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Problems solved by technology
But the actual operation is very difficult, because the gear size is very small and has good elasticity, and the cutting must be stopped during the measurement, which makes the whole measurement process unstable, inefficient and difficult to ensure accurate data
Based on the fact that the size of the gear is too small to measure, and the dimensional accuracy and measurement efficiency must be ensured, the patent of this invention proposes a measurement system using two laser probes and a rotating measuring table to measure the cutting error of the flexible gear in a non-contact and inelastic manner. The deformation measurement method can effectively improve the measurement accuracy and measurement efficiency
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[0012] (1) if figure 1 Schematic diagram of the measurement system. The flexible gear is fixed and installed on the rotating measuring table using a static pressure cylindrical fixture. The measuring table is driven by a stepping motor; then two laser probes are fixed in parallel at the same height as the gear. The laser probe adopts LC-2420 type The laser displacement sensor has a resolution of 10nm; the two displacement sensors are connected to the computer through the AD module for data collection and calculation.
[0013] (2) Before actual measurement, select figure 2 The middle flexible external tooth gear is used as a reference gear for calibration measurement; adjust the distance between the two parallel probes so that the two measurement points of the laser on the tooth surface are located on the pitch circle of the gear, so that the small-scale measurement area around the measurement point regarded as a straight line; figure 2 As shown, when measuring the two teet...
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The invention relates to a flexible gear for a harmonic reducer, and in particular to a cutting error measurement method for a flexible gear for a harmonic reducer. The laser probe emits two parallel laser beams at a certain distance, which are respectively shot on different tooth surfaces, and then the probe outputs the measured distance. If overcutting or undercutting occurs, the tooth thickness will inevitably change, resulting in a change in the probe output signal. The cutting error caused by the cutting depth of the hobbing machine and tool wear can be calculated from the difference in the output signal, and can also be calculated by rotating Gear, measure its full teeth to reduce the positioning error caused by adjusting the relative position of the gear and the probe, and meet the requirements of manufacturing quality control.
Description
technical field [0001] The invention relates to a flexible gear for a harmonic reducer, which measures the cutting error of the tooth profile through a laser probe and a rotating measuring platform system; in order to reduce the inconvenience caused by the micrometer and the Kuven line in the traditional measurement method to the measurement process and the damage to the measurement result The error of the present invention proposes a cutting error measurement method of the flexible gear used in the harmonic reducer, which belongs to the precision manufacturing technology of advanced equipment. Background technique [0002] The main structure of the harmonic reducer is a harmonic generator, a flexible external gear and a rigid internal gear. The harmonic reducer has a high deceleration rate and almost no tooth backlash. It is featured in high positioning accuracy, good repeatability, high torque, high efficiency and low wear in industrial robots, machine tools, and medical e...
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IPC IPC(8): G01M13/02G01B11/04
CPCG01B11/2416
Inventor 孔德军张垒付贵忠王文昌叶存冬王进春
Owner CHANGZHOU UNIV