Screw rotor type surface profile error measurement instrument
An error measurement and surface profile technology, applied in measurement devices, instruments, optical devices, etc., can solve problems such as academic difficulties, complex compensation of probe ball radius errors, and inability to spiral profile measurement, and achieve three-dimensional reconstruction. , Improve the measurement accuracy and avoid the effect of probe radius compensation
Active Publication Date: 2012-07-04
HEFEI UNIV OF TECH
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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 bec
Method used
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[0038] see figure 1 , figure 2 with image 3 , the front conical hole of the head frame 1 is precisely matched with the head frame thimble 16 as a conical surface, the head frame 1 is fixed on the base 4 with T-shaped screws 8, and the bottom of the base 4 is provided with a leveling foot 5 for adjusting the level of the base 4 The driving rod 15 is fixedly connected to the rotary table 19 through the external thread at the front end, the cylindrical hole on the upper surface of the shifting fork 14 is in clearance fit with the driving rod 15, and a pair of threaded holes are arranged at the lower end which are flush with the axial position of the rotor to be tested. The tightening screw 18 is screwed and passed through the threaded hole to clamp the measured helical rotor, so that the electric rotating table 17 drives the measured rotor 2 to rotate to realize precise indexing.
[0039] see Figure 5 with Image 6 The electric rotary table 17 fixedly arranged on the front...
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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...
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Inventor 胡鹏浩刘善林党学明王会生
Owner HEFEI UNIV OF TECH
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