Screw rotor type surface profile error measurement instrument

Abstract

The invention discloses a screw rotor type surface profile error measurement instrument. The screw rotor type surface profile error measurement instrument is characterized in that: a measured rotor is supported between a headstock center and a tailstock center, and the measured screw rotor is driven by rotary working platforms to rotate; and a movable working platform is arranged, a measurement unit is arranged on the movable working platform, a long grating sensor for detecting the position of the movable working platform is arranged in the measurement unit, and a laser displacement sensor is fixedly arranged on an electric rotary disk. According to the screw rotor type surface profile error measurement instrument disclosed by the invention, the original measurement data on the screw rotor type surface feature is acquired under the motion coordination of two rotary working platforms and a one-dimensional translation platform by using the laser displacement sensor, and the corresponding data treatment and coordinate conversion are performed, so that the screw rotor type surface profile error data can be obtained and the error assessment result is given; and the screw rotor type surface profile error measurement instrument is simple in structure and good in processing and assembling performance, and is capable of realizing the surface profile error measurement on various screw surfaces and compatibly equipping sensors of other types for precise measurement of other parameters.

Description

technical field [0001] The invention relates to a measuring device, more specifically, it is used to measure the relevant parameters of various curved surfaces with helical characteristics, and can be applied to helical gears, precision screw rods, compressor helical rotors, helical pump rotors, gear processing tools Devices for precision measurement of parts and components. Background technique [0002] In the modern machinery industry, many kinds of surface error measurement problems with spiral characteristics are involved. For example, the screw rotor, the core component of the screw compressor, its shape and precision directly affect the working efficiency, noise and vibration level and service life of the compressor; for example, the hob for processing gears, its contour surface error will be directly and periodically reproduced on the machined gears. Therefore, the surface error measurement technology and evaluation technology with spiral characteristics are increas...

AI Technical Summary

Problems solved by technology

[0003] 1. The price of the three-coordinate measuring machine is high, and the rotor measurement requires corresponding special detection software

The price of the software is also high, and the operation is relatively complicated, and the technical requirements for the operator are also relatively high

These have restricted the popularization and promotion of the method itself.

[0004] 2. Three-coordinate measuring machines generally use high-precision trigger ball probes. Due to the complex structure of the end surface profile and large curvature changes, the error compensation of the probe ball radius becomes complicated. So far, there are still theoretical difficulties and deficiencies in the academic field. ;

[0005] 3. The measurement time is long, which is only suitable for random inspection, not suitable for rapid detection and online detection, and it is difficult to meet the needs of rotor manufacturing enterprises

[0006] 4. It can only measure the linear error of the two-dimensional section profile in the rotor shaft section, and cannot measure the profile of the entire spiral profile from the perspective of three-dimensional space, let alone evaluate the profile error of the measured rotor surface

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