Search results

Surface Morphology is now recognized as one of the key factor in advanced machining technology for functional behaviour of a part [6].
Also, increment in depth of cut also negatively affects roughness of parts and produces an increment of cutting forces, while increasing the cutting speed are improves surface finish while reducing the cutting forces [10].
The austenitic stainless steels are a combination of good mechanical properties and good corrosion resistance.
In this respect is a need to understand how the properties of a surface layer generated in turning process.
The main purpose of this study was to determine the effect of cutting speed as a key process factor in controlling surface quality.

Those measuring results can be used to analyze the influence factors of welding deformation, control the welding deformation and verify the welding numerical simulation.
Introduction With the advantages of light weight, excellent processing property (easy processing and forming) and the convenient connection, sheet metal is widely used in manufacturing industry such as marine engineering, aeronautics and astronautics devices, automobile industry, and so on.
But the optical circuits are complex and are susceptible to environmental factors to environmental impacts.
In the process of welding, the image quality may be affected by a large amount of smoke and the white brightness.
In heat-affected zone, with the influence of the tensile stress produced by cooling of the weld bead and the plate in heat affected zone is heated, sheet metal in this area has a certain expansion in the transverse direction, leading to the value of the transverse strain in the heat affected zone are positive.

The fallowing facts are the main factors to be considered in the design of the countor detection system
The roughness is presented in two Physical Properties: big variation in the angle of the reflective surface caused by the shape and reflective Level caused by the color grade of the material.
According to the above five factors, the sensor must works well in a strong light，dense smoke, high temperature working environment.
The accuracy of the optical grating is 10μM; the total error of the mechanical parts is 0.1mm; the whole static error is not greater than 0.11mm.
By analyzing the mechanism of the linear servo system[3], the motion detection system transfer function is : where the parameters are: Ka: driver amplifier factor.

The temperature influences mechanical properties of frozen soil and forms freezing-thawing interface in the slope, which make great influence on the stability of slope.
No change of soil mass mechanical property caused by temperature distribution and influence of freeze-thaw interface is considered.
Coupling of temperature field Mechanical property of frozen soil changes with different soil temperature.
We develop frozen soil slope stability evaluation process based on influence of temperature distribution on change of soil mass mechanical property and freeze-thaw interface.
Random trials used in determining global minimum factors of safety of slopes [J].

Several factors affect the surface roughness such as the machining parameters, the cutting tool properties, the workpiece properties, and the cutting phenomena [1].
Therefore, the temperatures generated in the cutting zone are an important factor to take into the consideration.
Hence, the dynamic cutting temperature is the important factor that can help to explain the chip breaking.
Somkiat: Journal of Advanced Mechanical Design Systems and Manufacturing (2007), p. 366 [10] J.
Stephenson: The American Society of Mechanical Engineer.Vol.113 (1991)

Both properties are provided by the supplier.
Both chemical and physical properties are provided by the supplier.
Fresh properties and hardened properties.
Results and Discussion Fresh properties.
Austin, Factors affecting the slump and strength development of geopolymer concrete, Constr Build Mater, 261 (2020)

Research on Temperature Stress for Contacts Reliability of Electric Connector Yong-ying DU 1,2a, Zhi-li SUN 1b 1College of Mechanical Engineering & Automation, Northeastern University, 110819,China. 2School of Mechanical Engineering, Shenyang University of Chemical Technology, 110142, China aduyongying311 @126.com, bzhlsun@mail.neu.edu.cn Keywords: Reliability; Simulation analysis ; Electrical connector; Temperature stress Abstract.
Equivalent body identified for the electrical connector contact resistance Since the contact resistance joule heat generated by the contact of the contact member is the main factor causing a temperature rise in electrical connector, in the process of modeling and simulation, the main consideration is the thermal influence of the contact resistance.
The analysis of steady-state analysis, as needed between the contact body comprising a contact analysis [4], the corresponding contact should be established right, in order to achieve the transfer of heat between the body and the contact resistance is equivalent to the pin jack, to thermal exchange thermal contact conductivity need to set specific configuration parameters .The electrical connector temperature distribution was researched according to the corresponding material properties, boundary conditions and load.Among the settings for temperature field analysis the value of thermal conductivity is 83.7 (W/m·K),the value of Contact resistance is 0.005 (Ω) ,the value of Current is 7.5 (A),the value of Convective heat transfer coefficient is 5 (W/m2·K),the value of Model outside temperature is 25 (℃).After solving and post-processing analysis of available electrical connector temperature distribution shown in Figure 3.
Fig.5(a) Contact Stress at 25℃ Fig.5(b) Contact Stress at 48.2℃ Electrical connector failure equation under the role of temperature stress There is the following relationship between the creep rate and the temperature of both the metal material by field test analysis: （1） Where is creep rate and is Conversion factor; and is normal stress suffered by the metal surface;is Metallic materials free diffusion activation energy; Boltzmann constant ;is thermodynamic temperature.
Beijing: mechanical industry press, In Chinese.1988

Research on the Anti-interference Tactics of Substation Automation Equipment Gu Xiao-jia, Liu Yun and Lin Yi Wuhan Mechanical Technology College 27499183@qq.com Keywords: substation automation equipment; electromagnetic interference; anti-interference tactics Abstract.
The reliability of substation automation equipment directly affects the safety and economic operation of power system, its anti-interference ability is the key to the reliable operation of the whole system.
Grounding system chaos in its interference is the main place of potential uneven distribution of access, different access to potential difference exists between locations, caused by the loop current, affecting the normal work of the system.
Summary Interference in the substation is a very complex issue, so the interference design should be comprehensive consideration of various factors, rational and effective anti-interference suppression of interference, some still need to make a concrete analysis of the method, take an antidote against the disease, to enable automation equipment normal work.
IEEE Transactions on Industry Applications . 1998 [5] Marian Popov,Leonid Grcev.An ATP-EMTP-Based model for analysis of shielding properties of ferromagnetic cable sheaths.

The characteristics of the steel braced frame that overall force and stability are fully utilized, and also the steel properties, such as high strength, high tenacity and high wearing.
Meanwhile, the mechanical properties of steel are continuously improved, leading to the further optimization of the thickness, width and rolling ability of steel products.
e) Steel structure dam makes it feasible to monitor power network and numerous flow factors like flow regime, flow velocity, sediment concentration and water temperature at any time by computer-control system.
The construction can proceed without setting the cofferdam and has no affect on the flow capacity of riverway.
The suggestion of steel structure dam can give full play to the steel’s excellent physical properties and opens up a whole new field for the usage of steel.

Finally, improve the winch device design to increase the safety factor.
Somebody designed a device to escape [2], but it’s not universal; another way is to escape by others’ help, its safe factor is better, but always suffered by the using conditions.
Worm and worm-wheel meshing parts of the mechanical properties can be described as the equivalent mesh stiffness and damping, the diagram is shown in Fig.5.
Fundamental frequency of vibration of the largest, followed by high-order harmonic vibration reduction; and vibration decreases with the increase of speed, this is due to transmission error, input and output volatility and the rotor eccentricity and other factors arising from the incentive, the experimental results and power analysis are consistent.
Prototyping to improve and check The quality of assumed target is 100 kg, there is no problem hovering in the air when in test, but the promotion process is effected by various factors such as the rope material, compression status and enhance the process of shaking, impact and other factors, affect the rope and the wheel still exists, it between the partial slip phenomenon.