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Online since: November 2012
Authors: Jia Jun Ren, Rui Qin Li, Jing Jing Liang
The main effect factors of the continuously variable speed performance and output torque are obtained.
This paper aims at the exploration and study on the motion properties by applying virtual prototype technology to obtain the curve of the dynamics characteristics and make a good study of the step-less speed change performance of the system.
The input rotation speed becomes a vital element that affects the output torque.
Mechanical Design and Research, Vol. 17-3 (2001),p. 40-43.
Agricultural Mechanical Journal, Vol. 31-2 (2000),p. 9-11
Online since: March 2020
Authors: Sergei Alexandrov, Li Hui Lang, Lei Li, Blala Hamza
FMLs have several advantages over monolithic materials, which include higher strength, fatigue resistance, impact resistance, fracture toughness, fire resistance and higher mechanical energy absorption [3].
Forming limit height of specimens with different factors Effect of Core Layer.
The direction of layup of core layer is also an important factor for sheet metal forming [8].
For different thickness of the skin layer, the interface situation will affect the optimal forming height
Jin, Influence of the morphology of alumina filler on electrical and thermal properties of epoxy resin composites.
Online since: September 2013
Authors: Ning Ma, Fu Xing Ye, Zhen Xiong Cheng, Huan Tao Wu
Effects of HVOF spraying parameters on the microstructure and properties of submicron structural WC-12Co coatings were examined.
Carbide grain size and cobalt content play a vital role in determining the mechanical properties and the wear resistance of thermally sprayed WC-Co coatings.
Effects of spray distance on properties of WC-12Co coatings Spray distance is one of the important influence factors which determine the quality of coating[16].
Conclusions The effects of fuel flow rate and spray distance on WC-12Co coatings properties were investigated.
(2) The spray distance significantly influenced the coatings properties.
Online since: March 2011
Authors: Li Feng Wu, Ya Lan Zhang, Kun Zhang
Each have different characteristics: monomer acrylonitrile with high strength, thermal stability and chemical stability; Butadiene with tenacity, butadiene impact resistant properties, Styrene is easy processing, and with good surface and high strength.
ABS has good performance, impact resistance, high mechanical strength, easy workability, appearance, low creep properties and superior dimensional stability and good welding with organic glass, for example, and it is widely used in engineering, electrical equipment and automobile industry. 1.2 Making sure the number of cavity The three-dimensional plot of plastic is shown as: (1), through the analysis of the knowledge, we can know the left-right part of the product is not symmetric.
According to the volume of plastic parts ,we choose XS—ZY—125 (horizontal) injection machine. 1.3 The choice principle of parting surface Parting surface decided the mould structure, and it is an important factor that related to the overall structure of the mould, the design of gating system, demoulding and the manufacturing process of mould【4】.
The slide block backward-shift will also affect the precision plastic parts, So, when mould is injected, it is necessary to setup lock.
Fig.6 The physical diagram of the heel block During the design of chocking, what we still need to be considered is the chocking pieces of oblique (also called chocking angle).In order to make the lateral twitch smoothly, the chocking angle oblique guide should be greater than fixing, otherwise it will affect the core.
Online since: July 2006
Authors: Yong Kang Zhang, Ji Chang Yang, Jian Zhong Zhou, Hui Xia Liu, Xing Quan Zhang, Chao Jun Yang
Introduction The technique of high-power laser induced shock waves has been widely investigated to improve material properties, such as the resistance properties of materials to fatigue, wear and corrosion etc since 1970s [1,2].
In this paper, the mechanism of laser peen forming of sheet metal is analyzed firstly, then a series of experimental of line-track-peening is carried out with specimens of 45 steel sheets, the surface quality and forming properties are investigated fundamentally.
The specimen used in the experimental was 45 steel with dimensions of 60mm™40mm™2.0 mm, its mechanical and physical properties is shown in the Table 1, The deformation of specimen contour after laser peening was measured by Taylor Hobson contour meter, and the residual stress of the sheet was measured using x-ray diffraction method.
Table 1 Properties of 45 steel specimen Mechanical properties Physical properties Thickness [mm] Yield strength [MPa] Tensile strength [MPa] Hardness [ HB] Elastic mould [GPa] Density [kg/m 3 ] Thermal conduction [W/m 0C] 2.0 352 597 241 201 7810 48.15 (a) Fixture sketch (b) Laser peening path Fig.3 Experimental scheme of laser peen forming Results and Discussion Laser peening was carried out at one, two and three pass along the line path, each pass was consisted of ten laser shot peening.
The sheet metal responds to this residual stress by elongating at the peened surface and effectively bending the overall shape, it is a mechanical process, not a thermal process.
Online since: June 2018
Authors: Yuuka Ito, Yasuhiro Maeda
The green sand mold with good mold properties are useful to obtain the sound cast iron castings.
They are tried to simulate the dynamic behavior during molding and to predict the mold properties after squeeze molding.
On the other hand, the green sand mold with good mold properties are useful to obtain the sound cast iron castings.
The literature [1] showed the pressure on squeeze plate, the pressure on the side wall, the dynamic compacting behavior of green sand and the void fraction (bulk density) for mold properties.
Nomura: “Squeeze Molding Simulation Using The Distinct Element Method Considering Green Sand Properties”, J.
Online since: January 2012
Authors: Ping Lu, Wei Bo Huang, Xu Dong Liu, Zhang Jing
Adhesion is another significant factor affecting performance of polyurea coating.
However, the interface adhesion is highly affected by a myriad of complicated conditions including material properties, construction conditions, the application method, the quality of concrete substrate, and the way in which the concrete substrate was prepared for surface preparation system.
Therefore, it is essential to study the influences of these critical factors, in order to design more reliable coating system and improve the protective performance.
It provided comprehensive solution for Beijing-Shanghai high speed railway waterproof membrane application in myriad climatic factors of changes.
(4) Although both E1 and E2 surface preparation system were epoxy based, their properties and performance were different
Online since: May 2020
Authors: Martin Sahul, Marián Haršáni, Tomáš Vopát, Tomáš Zlámal, Ondrej Vortel
Introduction The coating-substrate adhesion strength, hardness of coated cutting tools and cleaning of the substrate before deposition are very important factors for producing the performing cutting tools [1].
The coating adhesion is strongly affected by process of plasma pre-treatment [4][5].
In the work [6], the mechanical properties and the high temperature oxidation resistance of Ti–B–Si coatings with various Si amounts were investigated.
The effect of coating deposition parameters on the mechanical properties of CrAlSiN thin coatings are discussed in [16][11].
SEM images of the Rockwell-C indents and evaluation of coating-substrate adhesion on cemented carbide cutting inserts prepared by wet microblasting Conclusion This article state that bias voltage affected the properties of the series of AlCrSiN nanocomposite hard coating.
Online since: July 2016
Authors: Fu Shi Zhang, Rui Fu, Ting Zhang, Hua Zheng Sai, Li Xing, Jun Hui Xiang, Zhen You Li
Mechanical Properties.
Mechanical Properties.
These points confirm that microcrystalline cellulose solution can reinforce located at outsides of cuboid shaped samples to make the strengthened samples bear higher compressive stress and perform stronger mechanical property.
Notably, microcrystalline cellulose concentration in the initial solution was an important factor which affects samples mechanical properties.
In conclusion, the skeleton strengthened of BCAs was achieved, which provided a simple and feasible way to obtain SBCAs with excellent mechanical properties for extensive applications.
Online since: July 2018
Authors: Vladislav L. Bibik, Natalia Ivushkina, Andrey Bibik
However, to date, very few studies have been completed to find the unified theoretical and theoretical-experimental equations that allow us to determine the optimal cutting conditions for the processed and tool materials with wide variations in their physical and mechanical properties.
Among the factors affecting the wear of the cutting edges, the cutting temperature plays the most important role.
Under small cutting speeds (in the area of build-up) В < 0.4 and it means that the algorithm contains a mistake which affects the results of cutting temperature calculations.
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