Forming Mechanism of Asymmetric Cylinder With Oblique–Straight Flange Spinning

2019 ◽  
Vol 141 (6) ◽  
Author(s):  
Z. Jia ◽  
Z. R. Han ◽  
Y. Xiao ◽  
S. D. Ji ◽  
B. Xu
Keyword(s):  
Working Condition ◽  
Dimensional Space ◽  
Cylinder Wall ◽  
Forming Mechanism ◽  
Roller Path ◽  
Spindle Rotation ◽  
Spinning Process ◽  
Working Principle ◽  
Straight Lines ◽  
Shear Spinning

The asymmetric cylinder with oblique–straight flange spinning has the potential to become a production process for this shape of the aerospace part. This complex shaped part was attempted to be formed by synchronous multipass spinning from a blank disk of 6061-O aluminum alloy with 1.15-mm thickness. The working principle of synchronous multipass spinning focuses on the fact that the radial and axial positions of the roller are synchronized with the spindle rotation to form the roller path. The roller path was calculated by dispersing a pass set into numerous points. The dimensional space between two points from the corresponding curves in a single-pass set was integrated into the trajectory around the circumference. Here, a pass set is the path along which the roller propagates in the two-dimensional space defined by the radial and axial directions. This shape was confirmed to be spun, and the formation mechanism of this spinning process was investigated. Contrastive experiments with paired arcs and pairs of straight lines as roller paths were performed on a spinning machine. The working condition of the cylinder wall with pairs of straight lines roller path was broken because of the higher pull resistance from the remaining part of the flange. The working condition of the flange of the paired arcs follows the law of shear spinning approximately that the cylinder wall forming does not comply. Suitable metal distributions for the flange and an appropriate force state for the cylinder wall are realized by the paired arcs roller path in the spinning process to form the asymmetric cylinder with oblique–straight flange. This provides a theoretical basis for the spinning of the asymmetric cylinder with the oblique–straight flange.

Research on Dynamic Characteristics of Anti-Reverse Valve for Hydraulic Excavator Rotary Motor

2013 ◽  
Vol 871 ◽  
pp. 290-295
Author(s):  
Yan Lei Luo ◽  
Cong Guo Xu ◽  
Qiu Yan Zhang
Keyword(s):  
Dynamic Characteristics ◽  
Hydraulic System ◽  
Working Condition ◽  
Great Influence ◽  
Hydraulic Excavator ◽  
Middle Chamber ◽  
Working Principle ◽  
The Impact ◽  
Rotary Motor ◽  
Amesim Simulation

Hydraulic excavator slewing system is an important component of the excavator and its core-component is the rotary motor. When the rotary hydraulic system starts, stops, and reciprocating works, dynamic characteristic of rotary motor anti-reverse valve has a great influence for working condition of the whole system. Through researching working principle of hydraulic system anti-reverse valve, establish dynamic mathematical model of anti-reverse valve, analyze dynamic response of the model, and get the theoretical foundation of the impact of anti-reverse valve middle chamber throttle opening on hydraulic system. According to the actual working condition of the excavator slewing hydraulic system, establish the system AMESim simulation model, take different parameters of the anti-reverse valve throttle opening, conduct simulation and analysis of the anti-reverse valve characteristics, and validate throttle opening has a great influence on dynamic characteristics of the hydraulic system.

3D Laser Scanner and its Application in Engineering Survey

2013 ◽  
Vol 671-674 ◽  
pp. 2111-2114
Author(s):  
Yan Ping Feng ◽  
Wei Guo Li ◽  
Li Bing Yang ◽  
Yan Li Gao ◽  
Wen Bin Li
Keyword(s):  
Laser Scanning ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Laser Scanner ◽  
Target Object ◽  
Scanning System ◽  
3 Dimensional ◽  
Working Principle ◽  
Laser Scanning System ◽  
Three Dimensional Space

3D laser scanning system is to use laser ranging principle to record intensively the 3D coordinates, reflectivity and texture information on the surface of the target object. It makes a real record of the three-dimensional space, which makes traditional measurement be released from the limit that couldn’t be exceeded in the past, and let the measurement precision up to a new level. At the same time, it has provided extensive researches with better help than ever. This paper mainly discusses the characteristics, working principle, application and future development of the ground 3 dimensional laser scanner.

On the Mechanics of Shear Spinning

1961 ◽  
Vol 83 (2) ◽  
pp. 125-130 ◽  
Author(s):  
Serope Kalpakcioglu
Keyword(s):  
Experimental Data ◽  
Shear Strain ◽  
Specific Energy ◽  
Tangential Force ◽  
Metal Flow ◽  
Shear Strain Rate ◽  
Analytical Work ◽  
Spinning Process ◽  
Shearing Mechanism ◽  
Shear Spinning

With the use of an idealized model of the shear spinning process some of the basic quantities in the shearing mechanism have been defined and formulated, these being: shear strain, shear strain rate, specific energy, and tangential force (torque) in spinning. An experimental technique to study metal flow in shear spinning has been described. The results of analytical work have been compared with experimental data.

The Analysis and Treatment to Lube Oil Separator’s Leakage

2011 ◽  
Vol 328-330 ◽  
pp. 734-737
Author(s):  
Shu Ye Sun ◽  
Guo Yong Zhang
Keyword(s):  
Working Condition ◽  
Basic Structure ◽  
Oil Leakage ◽  
Good Working ◽  
Failure Point ◽  
Working Principle ◽  
Working Performance ◽  
Sealing Elements

The lube oil separator is widely used in lube oil system of merchant vessel. The lube oil separator functions to purify the lube oil to ensure its good working performance. The working condition of the oil separator will greatly influence the normal running of many plants. The lube oil separator used in our laboratory is Mitsubishi SJ700. In the processing of purifying, oil leakage from the water outlet is found. In order to find failure point, the basic structure and the working principle of the separator is introduced. The separator is dismantled according to the procedure. After cleaning some parts found dirty and replacing some sealing elements, the separator is reassembled. When starting the separating process again, the failure remains. Through further analyzing the structure and working principle of the separator, the trouble spot is found out. After removing the failure, the separator finally is repaired. To prevent similar accident occurring again, some suggestions are presented.

Plastic Flow Instability Under Compressive Loading During Shear Spinning Process

1982 ◽  
Vol 104 (1) ◽  
pp. 17-22 ◽  
Author(s):  
Micha Gur ◽  
Jehuda Tirosh
Keyword(s):  
Flow Instability ◽  
Compressive Loading ◽  
Plastic Instability ◽  
External Condition ◽  
Tube Spinning ◽  
Upper Bound Analysis ◽  
Spinning Process ◽  
Sudden Appearance ◽  
Shear Spinning ◽  
Bound Analysis

The sudden appearance of a material bulge beneath the roller during tube spinning operation (referred to as “plastic instability”) is considered experimentally and examined quantitatively via an upper bound analysis. The phenomenon is explained by a sudden transfer of flow from one admissible mode to its competing mode when an external condition (or few conditions) is changed in a certain way to be discussed (e.g., increasing the roller angle of attack, increasing the initial tube thickness, etc.). As a by-product, the interrelation between the dominant variables of the process emerges. The associated formulation with its inherent idealizations enables one to mark the line between favorable and unfavorable working conditions of the spinning process. Experimental evidence demonstrates the utility of the proposed approach.

The Design and Analysis of Mast of Fixed Window-Cleaning Based on ANSYS

2013 ◽  
Vol 791-793 ◽  
pp. 774-777
Author(s):  
Ping Huai Mao ◽  
Li Ding ◽  
Jing Xi Li
Keyword(s):  
Working Condition ◽  
Rapid Development ◽  
Design Methods ◽  
Working Principle ◽  
Set Up

Recently, with the rapid development of the window-cleaning, we need set up a scientific design and renovation method. This paper based on the working principle of fixed window-cleaning, we deduced the design methods of the mast when its parameters changed followed the variation of the working condition. Then, we ensured the most dangerous working condition. And in this condition, we made an analysis of the mast based on ANSYS and found out the regularities of distribution of the stress. At last, it could provide worthy reference for the design of mast.

The Development of Friction Material Tester with Adjustable Speed and Pressure

2011 ◽  
Vol 328-330 ◽  
pp. 270-273
Author(s):  
Zhen Yu Wang ◽  
Tie Shan Wang ◽  
Bo Qu
Keyword(s):  
Working Condition ◽  
Friction Material ◽  
Structure Design ◽  
Constant Speed ◽  
Structure Parameter ◽  
Friction Tester ◽  
The World ◽  
Innovative Thinking ◽  
Working Principle ◽  
Adjustable Speed

In this paper, according to the Chase tester and applying the innovative thinking, the principle of the friction material tester with adjustable speed and pressure has been presented, and the tester has been designed and manufactured at the base of the friction tester of constant speed. This paper illustrates the working principle, composing parts and structure parameter of the tester in detail. A lot of repeatability tests have been done, as a result, it is demonstrated that the structure design of the new tester is reasonable and the performance is up to the mustard absolutely. With the application of the new tester at the expanded working condition, it has not only the function of the constant speed tester, but also the Chase tester. The new means used in the friction material test has been offered by the new tester, which is original in the world.

A PCOT Monitoring System Based on Virtual Instrument Technology

2013 ◽  
Vol 823 ◽  
pp. 241-246
Author(s):  
Ting Guo ◽  
Man Gong ◽  
Lei Xin Nie ◽  
Gen Ming Zhou
Keyword(s):  
Monitoring System ◽  
Experimental Verification ◽  
Virtual Instrument ◽  
Working Condition ◽  
Technical Support ◽  
Temperature Monitoring ◽  
Connecting Rod ◽  
Experimental Prototype ◽  
Working Principle ◽  
Instrument Technology

in order to monitoring connecting rod and crank pin bearings working condition, the PCOT monitoring system which was named crank pin oil temperature monitoring system was developed based on virtual instrument technology. The bearings working condition was estimated by testing oils temperature splashed from the connecting rod and crankshaft. The function, working principle and structure composition were described, and corresponding experimental prototype was researched. After experimental verification, this system could monitoring the crank pin oil temperature in a steady and reliable state, provided technical support for testing bearings faults.

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