A non-contact high precision measuring method for the radial runout of cylindrical gear tooth profile

2020 ◽  
Vol 138 ◽  
pp. 106543 ◽  
Author(s):  
Yong-Chen Pei ◽  
Hai-Liang Xie ◽  
Qing-Chang Tan
Keyword(s):  
High Precision ◽  
Gear Tooth ◽  
Measuring Method ◽  
Tooth Profile ◽  
Cylindrical Gear ◽  
Precision Measuring

The Research on Tooth Profile Total Deviation Measuring Method Based on Coordination Measuring Machine

2012 ◽  
Vol 184-185 ◽  
pp. 789-792
Author(s):  
Bing Li ◽  
Yu Lan Wei ◽  
Meng Dan Jin ◽  
Ying Ying Fan
Keyword(s):  
Mathematical Model ◽  
Data Processing ◽  
High Precision ◽  
Gear Tooth ◽  
Measuring Method ◽  
Tooth Profile ◽  
Cylindrical Gears ◽  
Total Deviation ◽  
Measuring Machine

Put forward a method that use scatter points which got in different places to measure the involution cylindrical gears, give a mathematical model that use the discrete points to sure the total deviation of gear tooth profile. The experience results show that this way is of high precision in measurement points, measurement an error data processing less intervention, etc.

The Research of High Precision FA45-29 Prototype Design and Process

2013 ◽  
Vol 655-657 ◽  
pp. 586-591
Author(s):  
Liang Xuan ◽  
Tian Min Guan ◽  
Lei Lei ◽  
Chang Xiu Lv
Keyword(s):  
High Precision ◽  
Gear Tooth ◽  
Measuring Method ◽  
Tooth Profile ◽  
Machining Accuracy ◽  
Gear Grinding ◽  
Process Route ◽  
Traditional Process ◽  
Planetary Transmission ◽  
Prototype Design

The machining accuracy grade of cycloid gear in high precision two teeth difference cycloid-pin gear planetary transmission is different to general gear, so it can’t be designed according to the requirement of universal transmission accuracy, this paper presents the design precision grade requirements of high precision cycloid. In the traditional process the two teeth difference profile need gear grinding three times include fixing addendum, which will affect the accuracy of cycloid-pin tooth profile. This paper puts forward the process route of molding grinding. In order to detect the accuracy of two teeth difference cycloid gear tooth profile timely when processing, this paper takes double rod measuring method gives the testing size of cycloid gear tooth profile. This paper adopts the method that the three piece of cycloid gear as a whole to process, which will guarantee the consistency and the same performance of the three pieces of cycloid gear.

Research on Eliminating Cumulative Errors for Stitching Algorithm of Large Aperture Aspheric Optical Elements

2014 ◽  
Vol 924 ◽  
pp. 377-381
Author(s):  
Yan Ting Zhang ◽  
Xu Yang ◽  
Xin Li ◽  
Yin Biao Guo
Keyword(s):  
High Precision ◽  
Measuring Method ◽  
Transformation Method ◽  
Aspheric Surface ◽  
Optical Elements ◽  
Fast Speed ◽  
Large Aperture ◽  
Precision Measuring ◽  
Surface Optical ◽  
Datum Transformation

The sptitching measuring method applied in large-aperture aspheric surface optical elements can expand the range of precision measuring instrument. And the key point is developing the technique for high precision measuring data processing. To deal with the problem of cumulative errors which existed in the process of multi-section stitching, datum-transformation method was proposed, according to the characteristic of stitching measurement. The stitching measuring experiments were carried out based on Talysurf PGI 1240 profilometer of Taylor Hobson Company to verify the purpose for eliminating cumulative errors. The results show that datum-transformation method is feasible with the characteristic such as fast speed, high precision, and good operability.

scholarly journals An improved high precision measuring method for shaft bending deflection

2017 ◽  
Vol 48 ◽  
pp. 860-869 ◽  
Author(s):  
Cong-Hui Wang ◽  
Yong-Chen Pei ◽  
Qing-Chang Tan ◽  
Jia-Wei Wang
Keyword(s):  
High Precision ◽  
Measuring Method ◽  
Precision Measuring

Laser Interferometric Measuring Method of Involute Artifact and Stabilization of Measurement

2011 ◽  
Vol 5 (2) ◽  
pp. 144-149
Author(s):  
Masaharu Komori ◽  
◽  
Fumi Takeoka ◽  
Aizoh Kubo ◽  
Hiroshige Fujio ◽  
...  
Keyword(s):  
Gear Tooth ◽  
Measuring Method ◽  
Tooth Profile ◽  
National Standard ◽  
Helical Gears ◽  
Involute Gears ◽  
Measuring Machine ◽  
Form Quality ◽  
Tooth Flank ◽  
Laser Interferometric

Vibration and noise are serious problems with involute spur and helical gears used, e.g., in drivetrains of vehicles such as automobiles. The gear tooth flank form of micrometer order markedly affects gear vibration and noise; therefore, the tooth flank form quality must be strictly controlled to maximize gear performance. Tooth profile measuring machines used in calibration for form error inspection of involute gears usually use an involute artifact, which itself must be calibrated highly accurately. However, it is typically difficult for current tooth profile measuring machine using contact stylus to calibrate the involute artifact with a high accuracy while satisfying traceability to a national standard. A highly precise and traceable measuring technology for the involute artifact is therefore required. The direct measurement of the involute artifact we propose uses a laser interferometer, whose measurement stability is confirmed in experiments measuring the detailed form of an involute tooth flank.

Processing Flow of Optical Fabrication for Correcting Lenses

2007 ◽  
Vol 24-25 ◽  
pp. 117-124
Author(s):  
Yun Zhang ◽  
Jing Feng Zhi
Keyword(s):  
High Precision ◽  
Spherical Shape ◽  
Measuring Method ◽  
Free Form ◽  
Optical Fabrication ◽  
Rotation Axes ◽  
Precision Measuring ◽  
Aspheric Lenses ◽  
Axes Of Symmetry ◽  
Processing Flow

This paper presents the processing flow and results of optical fabrication for an optical correcting lens with a free-form surface, namely a free-form lens. Because a correcting lens has no rotation axes of symmetry and its surface cannot be expressed by a continuity equation, its processing technology is different with that of general aspheric lenses. The correcting lens was firstly formed from a glass workblank with flat face using diamond abrasion wheel with spherical shape, and then loose abrasive lapped and polished with oblique axis spherical tools to decrease the surface roughness and increase the surface accuracy based on the measuring result after forming. At the lapping and polishing stages, two processing methods are employed. One is to control the processing pressure, and the other is based on dwell time. Since high precision fabrication is closely related with high precision measuring, this paper also presents a high precision non-contact optical measuring method based on image transforming for correcting lenses. The effectiveness of the processing flow and technology is confirmed by an experiment in which a workblank is processed into a satisfying correcting lens.

scholarly journals Analytical solution to contact characteristics for a variable hyperbolic circular-arc-tooth-trace cylindrical gear

2021 ◽  
Vol 12 (2) ◽  
pp. 923-932
Author(s):  
Rui Guo ◽  
Yongqiao Wei ◽  
Yongping Liu ◽  
Dawei Li ◽  
Dong Yang ◽  
...  
Keyword(s):  
Elastic Deformation ◽  
Gear Tooth ◽  
Point Contact ◽  
Tooth Profile ◽  
Normal Curvature ◽  
Tooth Surface ◽  
Contact Form ◽  
Cylindrical Gear ◽  
Circular Arc ◽  
Contact Ellipse

Abstract. The variable hyperbolic circular-arc-tooth-trace (VH-CATT) cylindrical gear is a new type of gear. In order to research the contact characteristics of the VH-CATT cylindrical gear, tooth surface mathematical models of this kind of gear pair are derived based on the forming principle of the rotating double-edged cutting method with great cutter head in this regard. Then, according to the differential geometry theory and Hertz theory, the formula of the induced normal curvature and equation of the contact ellipse are derived based on the condition of continuous tangency of two meshing surfaces, which proves that the contact form of VH-CATT cylindrical gear is point contact. The present work establishes analytical solutions to research the effect of different parameters for the contact characteristic of the VH-CATT cylindrical gear by incorporating elastic deformation on the tooth surface, which have shown that the module, tooth number and cutter radius have a crucial effect on the induced normal curvature and contact ellipse of the VH-CATT cylindrical gear in the direction of tooth trace and tooth profile. Moreover, a theoretical analysis solution, a finite element analysis and the gear tooth contact pattern are carried out to verify the correctness of the computerized model and to investigate the contact type of the gear; it is verified that the contact form on the concave surface of the driving VH-CATT cylindrical gear rotates from dedendum at the heel to the addendum at toe and is an instantaneous oblique ellipse due to elastic deformation of the contact tooth profile, and the connecting line of the ellipse center is the contact trace path. It is indicated that the research results are beneficial for research on tooth break reduction, pitting, wear resistance and fatigue life improvement of the VH-CATT cylindrical gear. The results also have a certain reference value for development of the VH-CATT cylindrical gear.

A Measuring Method of Flexible Bar Based on Machine Vision

2012 ◽  
Vol 220-223 ◽  
pp. 1373-1376
Author(s):  
Shao Wei Liu ◽  
Wu Liu ◽  
Guo Qing Ding ◽  
Xin Chen
Keyword(s):  
Machine Vision ◽  
High Precision ◽  
Measuring Method ◽  
Displacement Sensor ◽  
Laser Displacement Sensor ◽  
Servo Motor ◽  
Bending Rigidity ◽  
Minimum Thickness ◽  
Vision Inspection ◽  
Precision Measuring

This paper studies a high-precision measuring method about minimum thickness of thin neck and bending rigidity of flexible bar based on machine vision. The measurement system combines with the advantages of image vision inspection and laser displacement detection. After rough leveling and precise leveling to the clamped workpiece through the interworking of the camera, laser displacement sensor and servo motor, the image of thin neck and the upper profile of workpiece are captured by camera and laser displacement sensor respectively. Then the workpiece is rotated 180 through servo motor so as to capture the image of thin neck again and detect the bottom profile. Based on the two groups of images and profiles acquired above, we can figure out the minimum thickness of thin neck and bending rigidity of the workpiece with high precision. The effectiveness and feasibility of this method are confirmed by computer simulation with ANSYS software and experimental results with needle gauge and flexible bar.

Modeling of surface roughness in a novel magnetorheological gear profile finishing process

2020 ◽  
pp. 095440622097826
Author(s):  
Ravi Datt Yadav ◽  
Anant Kumar Singh ◽  
Kunal Arora
Keyword(s):  
Surface Roughness ◽  
Gear Tooth ◽  
Surface Characteristics ◽  
Spur Gear ◽  
Tooth Profile ◽  
Tooth Surface ◽  
Magnetic Flux Density ◽  
Element Analysis ◽  
Finishing Process ◽  
Gear Profile

Fine finishing of spur gears reduces the vibrations and noise and upsurges the service life of two mating gears. A new magnetorheological gear profile finishing (MRGPF) process is utilized for the fine finishing of spur gear teeth profile surfaces. In the present study, the development of a theoretical mathematical model for the prediction of change in surface roughness during the MRGPF process is done. The present MRGPF is a controllable process with the magnitude of the magnetic field, therefore, the effect of magnetic flux density (MFD) on the gear tooth profile has been analyzed using an analytical approach. Theoretically calculated MFD is validated experimentally and with the finite element analysis. To understand the finishing process mechanism, the different forces acting on the gear surface has been investigated. For the validation of the present roughness model, three sets of finishing cycle experimentations have been performed on the spur gear profile by the MRGPF process. The surface roughness of the spur gear tooth surface after experimentation was measured using Mitutoyo SJ-400 surftest and is equated with the values of theoretically calculated surface roughness. The results show the close agreement which ranges from −7.69% to 2.85% for the same number of finishing cycles. To study the surface characteristics of the finished spur gear tooth profile surface, scanning electron microscopy is used. The present developed theoretical model for surface roughness during the MRGPF process predicts the finishing performance with cycle time, improvement in the surface quality, and functional application of the gears.

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