Processing method and matching gear wheel of ultrahigh-precision complex curve rack

Abstract

The invention discloses an ultrahigh-precision gear wheel which comprises a wheel skeleton, a bearing and a cylindrical roller. A fixing hole is arranged in the wheel skeleton, the bearing is fixed in a fixing hole; and the cylindrical roller is assembled in the bearing. The invention also discloses an ultrahigh precision complex curve rack matched with the gear wheel, wherein a sawtooth in accordance with the parabolic movement path of the ultrahigh-precision gear cylindrical roller is arranged on the upper surface of the rack. The invention further discloses a processing method for the rack. The ultrahigh-precision gear wheel and the processing method have the following advantages: 1. stress of the gear wheel can be adjusted automatically, the transmission precision of the gear wheel is improved, and the noise during the transmission process of the gear wheel is lowered; 2. the tooth surfaces of the rack conform to the movement locus of the gear cylindrical roller so as to realize gapless precision transmission with ultralow transmission; and 3. a repeatedly progressive type processing method is adopted for the rack so as to realize high precision processing.

Description

technical field [0001] The invention relates to a precision machine, in particular to an ultra-high-precision complex curved rack, and a processing method thereof, and also discloses a processing method of a gear matched with the rack. Background technique [0002] At present, the surface of the conventional rack is trapezoidal, and the teeth on the matching gear surface are also trapezoidal. The following problems are prone to occur in the transmission process of the trapezoidal rack and gear: 1. During the transmission process, the gear and the gear mesh in reverse Gap; 2. Due to the existence of the gap, the transmission accuracy is affected; the transmission speed is slow; the noise is large. [0003] In order to improve the transmission accuracy, a wave-shaped rack was designed to replace the trapezoidal rack, and the matching gear teeth were also modified to be wave-shaped. Eccentric vibration is prone to occur during the process, which affects the transmission progre...

AI Technical Summary

Problems solved by technology

[0002] At present, the surface of the conventional rack is trapezoidal, and the teeth on the matching gear surface are also trapezoidal. The following problems are prone to occur in the transmission process of the trapezoidal rack and gear: 1. During the transmission process, the gear and the gear mesh in reverse Gap; 2. Due to the existence of the gap, the transmission accuracy is affected; the transmission speed is slow; the noise is large

[0003] In order to improve the transmission accuracy, a wave-shaped rack was designed to replace the trapezoidal rack, and the matching gear teeth were also modified to be wave-shaped. Eccentric vibration is prone to occur during the process, which affects the transmission progress and cannot achieve seamless transmission; moreover, because the gear and rack are in a state of vibration during the transmission process, the use noise is large

In addition, because there are a large number of convex and concave surfaces on the wavy saw teeth on the upper surface of the rack, the processing is difficult. The actual processed tooth surface is rough and cannot achieve high precision, resulting in gaps during the transmission meshing process, which affects accuracy.

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