On-machine measuring device of blade rack gauge head for on-machine measuring gearwheel deviation
A large gear and measuring instrument technology, which is applied in the direction of machine gear/transmission mechanism testing, measuring devices, measuring/indicating equipment, etc., can solve the problems of difficult selection of measurement reference, large gear inertia, low measurement efficiency, etc., and expand the measurement function , simple mechanism, and the effect of improving measurement accuracy
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Embodiment 1
[0023] The blade edge rack probe 7 is one of the important parts of the measuring instrument's mechanical system. The designed and manufactured probe has a solid top edge of 4 mm, a blade edge length of 80 mm, and a measurable modulus range of 16-32 mm. The manufacturing accuracy directly affects the measurement accuracy. Considering that most of the gears with pressure angle α = 20 degrees are used in engineering, the tooth angle of the probe is also designed to 20 degrees. The important geometric accuracy is the edge of the rack. Straightness and its angular deviation, the straightness error of the edge of the probe is ≤2μm, and the angular deviation of the two edges is controlled in manufacturing, and when it is to be installed on the measuring device, it is necessary to further check the respective deviations for measurement. Correction compensation.
[0024] In the linear displacement measurement system, the tangential measuring guide 4 is a measuring guide that completes the...
Embodiment 2
[0031] To measure the straight generatrix family of the tooth profile surface on the machine, it is necessary to complete three movements and obtain three measurement signals, namely the linear displacement along the gear axis (Z axis) and along the gear tangential direction (Y axis), and to obtain the profile The small turning angles Δφ and Δα required for the straight bus bars at different positions on the upper side can be divided into two integrated measurement schemes on the machine due to the different acquisition of angular displacement signals.
[0032] 1. Measurement of expansion angle (phase angle)
[0033] The essence of this method is to measure different straight generatrices by changing the initial phase angle when the blade edge rack probe 7 engages with the measured gear 21, which is called the expansion angle (phase angle) measurement.
[0034] (1) The measured gear 21 is on the worktable 22, and the rack probe 7 moves along the gear axis (Z axis) from one end to ...
Embodiment 3
[0044] Since the measured gear 21 is coaxially installed with the worktable 22, the measuring gear rotation angle is converted into the measuring worktable rotation angle, and the precision friction disc 11 in the angle measuring device is pressed against the outer surface of the hobbing machine worktable 22, and the two are adjusted. The axis of the friction disc 11 is parallel, and the grating 12 is installed coaxially on the friction disc 11, and the friction disc 11 is pressed by the pressure spring 16. When the two pairs of discs do pure rolling without sliding, the diameter of the two discs can be accurately obtained. , Through its transmission ratio, the rotation angle of the worktable can be accurately obtained, that is, the rotation angle displacement of the large gear. At this time, the indication error of the circular grating 11 is essentially reduced according to the transmission ratio of the two pairs of rolling discs. The measurement is Advantageously, at this time, ...
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