Research on the large gear detecting system based on LabVIEW

2015 ◽  
pp. 457-461
Author(s):  
L Hao ◽  
X Zhang ◽  
B Li ◽  
S Li ◽  
Y He ◽  
...  
Keyword(s):  
Large Gear

Kinematic Modeling of the Gear Shaping Based Novel Cutting Area Analytical Method for Large Gear Shaper

2012 ◽  
Vol 557-559 ◽  
pp. 2225-2228
Author(s):  
Bing Yu ◽  
Lian Hong Zhang ◽  
Hong Qi Du ◽  
Fu Cong Liu
Keyword(s):  
Analytical Method ◽  
Empirical Formula ◽  
Driving Force ◽  
Theoretical Foundation ◽  
Kinematic Modeling ◽  
Large Gear ◽  
Gear Manufacturing ◽  
Gear Shaping

Large gear is widely used as a key component of heavy machineries. Gear shaping is the most commonly process of large gear manufacturing. For the design of large gear shaper, the determination of its main driving force depends on the empirical formula. However, its result has shown that the main driving force is much larger than what really needs, which produces a lot of waste. A novel analytical method is proposed in this paper. According to this method, the cutting area can be calculated precisely, and the design of main driving force will be more reasonably, it also provides the theoretical foundation for the design of large gear shaper.

Signal Sampling and Accuracy Analysis of Large Gear’s Angular Displacement Measuring its Deviation On-Machine

2011 ◽  
Vol 189-193 ◽  
pp. 4201-4204
Author(s):  
Jia Qi Jin ◽  
Hui Li
Keyword(s):  
Measurement Accuracy ◽  
Angular Displacement ◽  
Total Error ◽  
Measuring Method ◽  
Displacement Measurement ◽  
Signal Acquisition ◽  
Accuracy Analysis ◽  
Friction Disc ◽  
Large Gear ◽  
Circular Grating

To solve the critical problem of large gear deviation on-machine: angle displacement measurement that is how to get signal acquisition and accuracy analysis of angle displacement. A new measuring method is proposed, which applies the dividing mechanism (it is composed of friction disc and circular grating) to ensure index and pick up signal of gear corner correctly and strictly according to the principle of angular displacement measurement. Furthermore, the main error which affects measurement accuracy is analyzed, and accuracy is analyzed with geometrical theory such as Fourier series and error synthesis principle etc. The experimental results indicate that angel dividing and signal samplings are easier and more efficient by the dividing mechanism, furthermore, the accuracy is in the range of total error that is permitted by verification, and the mechanism can also meet the requirement of high accuracy, so the method is significance that assessing transmission accuracy of involutes gear.

A portable instrument for checking teeth on large gear rings

1979 ◽  
Vol 22 (3) ◽  
pp. 340-341
Author(s):  
V. P. Pozdnyakov ◽  
L. M. Shereshevskii
Keyword(s):  
Portable Instrument ◽  
Large Gear

Super-Large Gear Measurement Using Laser Tracker and CMM

2014 ◽  
Vol 613 ◽  
pp. 111-117
Author(s):  
Zhao Yao Shi ◽  
Jia Chun Lin ◽  
Chen Guang Pan ◽  
Bai Zhang ◽  
Hu Lin
Keyword(s):  
Full Advantage ◽  
The State ◽  
Laser Tracker ◽  
Measuring Apparatus ◽  
And Topology ◽  
Large Gear ◽  
Manufacturing Accuracy ◽  
Key Techniques ◽  
The Relationship ◽  
Accuracy Performance

As general methods can no longer be used to measure super-large gears, their manufacturing accuracy, performance and quality cant be guaranteed. In this paper, after introducing the characteristics, measuring requirement and the state of arts of inspection of super-large gears, a laser tracker and CMM based measuring technology, proposed by Shi, was presented, and the key techniques were discussed. By taking full advantage of the characteristics of a laser tracker and a coordinate measuring apparatus, the super-large gears positioning problem, which was to determine the relationship between the instrument and workpeice, was solved. Thus, the gears profile, helix, and topology error etc. could be measured. Experiments have been carried out to verify the effectiveness of the method. The results showed that the proposed method could be used to measure super-large gears with the diameters up to 10m.

scholarly journals Detailed analyses of stall force generation inMycoplasma mobilegliding

2017 ◽  
Author(s):  
Masaki Mizutani ◽  
Isil Tulum ◽  
Yoshiaki Kinosita ◽  
Takayuki Nishizaka ◽  
Makoto Miyata
Keyword(s):  
Optical Tweezers ◽  
Type Strain ◽  
Wild Type Strain ◽  
Gear Ratio ◽  
Solid Surfaces ◽  
Force Generation ◽  
Wild Type ◽  
Step Size ◽  
Large Gear ◽  
Stall Force

ABSTRACTMycoplasma mobileis a bacterium that uses a unique mechanism to glide on solid surfaces at a velocity of up to 4.5 µm/s. Its gliding machinery comprises hundreds of units that generate the force for gliding based on the energy derived from ATP; the units catch and pull on sialylated oligosaccharides fixed to solid surfaces. In the present study, we measured the stall force of wild-type and mutant strains ofM. mobilecarrying a bead manipulated using optical tweezers. The strains that had been enhanced for binding exhibited weaker stall forces than the wild-type strain, indicating that stall force is related to force generation rather than to binding. The stall force of the wild-type strain decreased linearly from 113 to 19 pN following the addition of 0–0.5 mM free sialyllactose (a sialylated oligosaccharide), with a decrease in the number of working units. Following the addition of 0.5 mM sialyllactose, the cells carrying a bead loaded using optical tweezers exhibited stepwise movements with force increments. The force increments ranged from 1 to 2 pN. Considering the 70-nm step size, this small unit force may be explained by the large gear ratio involved in theM. mobilegliding machinery.SIGNIFICANCEMycoplasmais a genus of bacteria that parasitizes animals. Dozens ofMycoplasmaspecies glide over the tissues of their hosts during infection. The gliding machinery ofMycoplasma mobile, the fastest species, includes intracellular motors and hundreds of legs on the cell surface. In the present study, we precisely measured force generation using a highly focused laser beam arrangement (referred to as optical tweezers) under various conditions. The measurements obtained in this study suggest that the rapid gliding exhibited byM. mobilearises from the large gear ratio of its gliding machinery.

scholarly journals Constructional design of the body shape of large gear wheels

2021 ◽  
Vol 1199 (1) ◽  
pp. 012019
Author(s):  
S Sivák ◽  
S Maláková
Keyword(s):  
Body Shape ◽  
Gear Wheel ◽  
The Body ◽  
Spur Gears ◽  
Performance Parameters ◽  
Large Gear ◽  
The Subject ◽  
Body Shapes ◽  
Gear Wheels ◽  
Means Of Production

Abstract The development of modern machines and means of production is characterized by ever-increasing performance parameters with decreasing equipment weight. When designing large gears, it is also necessary to consider the influence of the body shape of the gear wheel. The body shape of gear wheel must meet the basic requirements of stiffness and strength with the lightest possible construction of the gear wheel body. The work is focused on large gears, made with relief. Such gears can be forged, cast, or made by welding. The shape of the gear wheel body depends on several factors such as the size of the wheel, the material, the method of manufacture or use. The paper provides an overview of the body shapes used by large spur gears. These body shapes of spur gears will be the subject of further research, where suitability will be assessed based on stiffness of teeth and wheel weight.

A New Process CAD Design Method for Steel Casting Based on PDF File

2014 ◽  
Vol 1049-1050 ◽  
pp. 2100-2104
Author(s):  
Hong Tao Tang ◽  
Li Li ◽  
Lang Huang ◽  
Shun Sheng Guo
Keyword(s):  
Steel Casting ◽  
Design Method ◽  
Casting Process ◽  
Cad System ◽  
New Process ◽  
Large Gear ◽  
Steel Castings ◽  
Low Efficiency ◽  
Rendering Engine ◽  
Casting Production

The process CAD design is the key part for steel casting production in general foundry enterprises. Formerly, for those parts with PDF file from customers, especially foreign customers, the process CAD design was done just by 2D casting process CAD system depending on AutoCAD system; so the designer must spend much time drawing part by AutoCAD according the PDF file which cause low efficiency. In this paper, a new process CAD design method is proposed based on PDF file in order to avoid drawing part by AutoCAD. Fist, the framework of process CAD design is constructed. Second, as the base part of process CAD design, the practical 2D CAD frame is established. Third, the part drawing with PDF file is resolved to be displayed clearly through the Mupdf rendering engine. Finally, the casting processes design of two actual steel castings, including a pump cover casting and a large gear casting, are presented to illustrate this new process CAD design method.

An Principle and Technology of On-Machine Measurement for Large Gear Hopping

2010 ◽  
Vol 118-120 ◽  
pp. 836-840
Author(s):  
Jia Qi Jin ◽  
Xing Yu Jiang ◽  
Feng Hui Li ◽  
Hui Li
Keyword(s):  
Phase Angle ◽  
Angle Measurement ◽  
Large Structure ◽  
Structure Quality ◽  
Pressure Angle ◽  
Profile Deviation ◽  
Large Gear ◽  
Definition Of ◽  
Edge Probe ◽  
Gear Profile

For large gear with the characteristic of large structure, quality and modulus, its profile precision is usually measured by in-site measurement. Based on large gear on-machine measuring described, involute helicoid and its characteristic are studied. The definition of medium rack in the framework of gear meshing transmission is put forward, the scheme of on-machine measurement based on rack-shaped-edge probe is formed, which can be divided into rolled angle (phase angle) and pressure angle (meshing angle) measurement according to the rotation of gear and prob. Measurement grid is determined by measuring straight generatrix deviation of gear profile, furthermore total tooth profile deviation and total helix deviation are separated.

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