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Online since: February 2011
Authors: Ya Li Hou, Chang He Li, Guo Yu Liu
Investigation into High-speed/super-high Speed Grinding
Yali Hou1,a, Changhe Li1,b and Guoyu Liu2,c
1School of Mechanical Engineering, Qingdao Technological University, 266033 China
2Inner Mongolia University for Nationalities, Tongliao, 028042, China
ahouyalichina@163.com, bSy_lichanghe@163.com, cliuguoyutliao@126.com
Keywords: High-Speed/Super-High Speed Grinding; High Efficiency Deep-Cut Grinding; Quick-Point Grinding
Abstract.
The factors affecting grinding are complex.
With CBN abrasive wheel to grind steel parts at 200m/s, the layer with surface residual stress has the depth less than 10μm; (6).The excellent properties of superhard abrasive, such as high hardness and high wearability, can be fully exhibited, and high-temperature brazing-metal bonded wheel is presently a novel abrasive wheel for super-high speed grinding; (7)It is a latest grinding technique capable of achieving high efficiency and high precision simultaneously as well as performing machining on various materials and shapes.
Besides, the tool-setting precision of abrasive wheel against workpieces as well as freeing wheel affects the precision of workpiece size and the dressing quality of abrasive wheel.
The laws of wheel properties, technical parameters and grinding fluid affecting grinding-debris removal, grinding force, grinding temperature and wheel abrasion are to be studied.The brittleness under extremely high strain rate and the grinding-debris removal mechanism of plastic materials as well as surface integrity evaluation and relevant control techniques are to be investigated.High-speed/super-high speed parameter optimization and database are to be established;The wheel abrasion law under high speed is to be studied.
The factors affecting grinding are complex.
With CBN abrasive wheel to grind steel parts at 200m/s, the layer with surface residual stress has the depth less than 10μm; (6).The excellent properties of superhard abrasive, such as high hardness and high wearability, can be fully exhibited, and high-temperature brazing-metal bonded wheel is presently a novel abrasive wheel for super-high speed grinding; (7)It is a latest grinding technique capable of achieving high efficiency and high precision simultaneously as well as performing machining on various materials and shapes.
Besides, the tool-setting precision of abrasive wheel against workpieces as well as freeing wheel affects the precision of workpiece size and the dressing quality of abrasive wheel.
The laws of wheel properties, technical parameters and grinding fluid affecting grinding-debris removal, grinding force, grinding temperature and wheel abrasion are to be studied.The brittleness under extremely high strain rate and the grinding-debris removal mechanism of plastic materials as well as surface integrity evaluation and relevant control techniques are to be investigated.High-speed/super-high speed parameter optimization and database are to be established;The wheel abrasion law under high speed is to be studied.
Online since: December 2012
Authors: Zhi Min Lu, Yu Long Zheng, Lin Zhang, Guang Liang Zhou
This shows the performance of CFRP pressure vessel is related not only with fiber strength but also with material properties of resin matrix, tension and solidifying system of winding process.
Basis for normal distribution properties it is little that deviation treble standard deviation, which is about 3% and can be neglected in engineering.
This shows the performance of composite is not only related with fiber strength but also with matrix formulation and fabrication technology. 4.1 Material properties of resin matrix have an important effect on composite properties, specimens in this test have been manufactured by continuous carbon fiber–-amine system, a new flexible formula.
A part of winding tension even equal to zero and this seriously affect the performance of carbon fiber materials.
Research direction: Mechanical Properties of Pressure Vessel and Solid Rocket Motor Case.
Basis for normal distribution properties it is little that deviation treble standard deviation, which is about 3% and can be neglected in engineering.
This shows the performance of composite is not only related with fiber strength but also with matrix formulation and fabrication technology. 4.1 Material properties of resin matrix have an important effect on composite properties, specimens in this test have been manufactured by continuous carbon fiber–-amine system, a new flexible formula.
A part of winding tension even equal to zero and this seriously affect the performance of carbon fiber materials.
Research direction: Mechanical Properties of Pressure Vessel and Solid Rocket Motor Case.
Online since: May 2020
Authors: Juan Li, Jian Ming Cai, Xu Huang, Rui Duan
Table 1 Tensile properties and fracture toughness of TA29 Titanium alloy blisk forging.
Results and Discussion Microstructure and Mechanical Properties.
The creep properties, fracture toughness and fatigue properties are well matched through appropriate heat treatment.
There are many factors affecting the fatigue crack growth behavior of materials.
(2) Temperature has a significant effect on the fatigue crack growth properties of TA29 alloy.
Results and Discussion Microstructure and Mechanical Properties.
The creep properties, fracture toughness and fatigue properties are well matched through appropriate heat treatment.
There are many factors affecting the fatigue crack growth behavior of materials.
(2) Temperature has a significant effect on the fatigue crack growth properties of TA29 alloy.
Online since: February 2013
Authors: Zhi Jing Zhang, Xin Jin, Xi Zhang, Ting Yu Zhang, Jian Feng Chen
The study finds that components manufacturing features from the manufacturing process (including machining, assembly, et al) are the main influencing factors of assembly accuracy and precision stability of precision mechanical system.
Factors effect 3D surface morphology of turning parts including the feed rates, processing method, the workpiece materials, geometry of cutting tool and the vibration between cutting tool and workpiece, etc[8,9].
The simulation result shows that the distribution of form error affects stress distribution of contact surface of parts assembly.
The Property Analyses in Sliding Lubricated Rough Contacts[J].
The mechanical properties, dimensional tolerance and microstructural characterization of micro-molded ceramic and metal components[J].
Factors effect 3D surface morphology of turning parts including the feed rates, processing method, the workpiece materials, geometry of cutting tool and the vibration between cutting tool and workpiece, etc[8,9].
The simulation result shows that the distribution of form error affects stress distribution of contact surface of parts assembly.
The Property Analyses in Sliding Lubricated Rough Contacts[J].
The mechanical properties, dimensional tolerance and microstructural characterization of micro-molded ceramic and metal components[J].
Online since: September 2021
Authors: Olga A. Ryabkova, L.A. Smirnova, E.V. Salomatina, Mariia Shirokova
From the point of view of solving environmental problems the development of intellectual adaptive self-cleaning coatings capable of reversibly switching mode and decompose pollution to harmless components under the influence of natural factors is the promising way [6].
Such composites exhibit photocatalytic properties and a switchable wetting mode [20].
Results of physical and mechanical tests of overlapped substrates.
Fujishima, Self-Cleaning Particle Coating with Antireflection Properties, J.
Watanabe et al., Transparent Superhydrophobic Thin Films with Self-Cleaning Properties, J.
Such composites exhibit photocatalytic properties and a switchable wetting mode [20].
Results of physical and mechanical tests of overlapped substrates.
Fujishima, Self-Cleaning Particle Coating with Antireflection Properties, J.
Watanabe et al., Transparent Superhydrophobic Thin Films with Self-Cleaning Properties, J.
Online since: August 2010
Authors: Luo Xing Li, Yan Lou, Na Luan
In this case, deformation heating affecting
the flow stress may be allowed to be taken out of consideration.
Measured true stress-true strain curves of AZ80 obtained at different preset strain rates and temperatures of (a) 350 oC, (b) 450o C. )/())95.0~9.0(( pCd T ρεσ η ∫=∆ (1) where T∆ is the change in temperature, η is the adiabatic factor, dσ ε∫ is the mechanical work, pCρ is the heat capacity and the factor 0.9~95 is the fraction of mechanical work transformed to heat.
It was found that η is a function of strain rate, temperature, strain, thermal properties of the die and workpiece and the interface heat transfer coefficient.
The response time of thermocouples is generally a limitation factor for transient temperature measurements.
The adiabatic factor η was obtained to be 0.0 for low strain rates of 0.01 and 0.1 s-1, and 1.0 for high strain rates of 10 and 50 s-1.
Measured true stress-true strain curves of AZ80 obtained at different preset strain rates and temperatures of (a) 350 oC, (b) 450o C. )/())95.0~9.0(( pCd T ρεσ η ∫=∆ (1) where T∆ is the change in temperature, η is the adiabatic factor, dσ ε∫ is the mechanical work, pCρ is the heat capacity and the factor 0.9~95 is the fraction of mechanical work transformed to heat.
It was found that η is a function of strain rate, temperature, strain, thermal properties of the die and workpiece and the interface heat transfer coefficient.
The response time of thermocouples is generally a limitation factor for transient temperature measurements.
The adiabatic factor η was obtained to be 0.0 for low strain rates of 0.01 and 0.1 s-1, and 1.0 for high strain rates of 10 and 50 s-1.
Online since: August 2022
Authors: Inez Kiantoro, Taufik Sumarsongko, Lisda Damayanti, Veni Takarini
Improvement in mechanical properties can be achieved by adding nanosilica fillers.
Silica particles are the most commonly used particles to improve the mechanical properties of silicone elastomers.
Adding filler particles to the maxillofacial silicone can benefit in increasing mechanical properties.
Therefore, this can be one of the factors that cause a decrease in the tensile strength of concentrated clean grade silicone fillers.
The mechanical properties of silicone depend on the effectiveness of mixing.
Silica particles are the most commonly used particles to improve the mechanical properties of silicone elastomers.
Adding filler particles to the maxillofacial silicone can benefit in increasing mechanical properties.
Therefore, this can be one of the factors that cause a decrease in the tensile strength of concentrated clean grade silicone fillers.
The mechanical properties of silicone depend on the effectiveness of mixing.
Online since: June 2011
Authors: You Min Huang, Yao Min Chang
However, neither a methodology nor an exact micro mechanical property has been well determined.
In order to find the mechanical properties in micro scale, this study shows the effect of specimen size and grain size on the micro tensile test of copper material.
This way is able to get the important factor which influenced the flow stress on the micro tensile test.
However, among the micro-manufacturing processes, micro forming has economical and ecological benefits due to high production rate, low materials scrap rate, net shape production, and improved mechanical properties through work hardening.
So the grain size affects the product accuracy and the product surface as well.
In order to find the mechanical properties in micro scale, this study shows the effect of specimen size and grain size on the micro tensile test of copper material.
This way is able to get the important factor which influenced the flow stress on the micro tensile test.
However, among the micro-manufacturing processes, micro forming has economical and ecological benefits due to high production rate, low materials scrap rate, net shape production, and improved mechanical properties through work hardening.
So the grain size affects the product accuracy and the product surface as well.
Online since: September 2011
Authors: Xin Hu Wang, Yao Rong Feng, Sheng Yin Song, Xin Xu
The mechanical properties of the new steel are much better than that of the common drill pipe steel.
The mechanical properties of the new steel are notably better than those of the common steel.
It is found that the mechanical properties of the No.2 steel are better than those of the No.1 steel in any case.
It is well known the dimension, appearance, quantity and dispersion of particles have the significant influence on the mechanical properties of steels, and the strengthening effect can be affected by the deformability of the particle.
(3) The precipitates have a significant influence on the mechanical properties of the new steel.
The mechanical properties of the new steel are notably better than those of the common steel.
It is found that the mechanical properties of the No.2 steel are better than those of the No.1 steel in any case.
It is well known the dimension, appearance, quantity and dispersion of particles have the significant influence on the mechanical properties of steels, and the strengthening effect can be affected by the deformability of the particle.
(3) The precipitates have a significant influence on the mechanical properties of the new steel.
Online since: March 2022
Authors: Hai Feng Liu, Shu Ing Doh, Qian Zhang, He Jiao Ma, Ren Guang Tao
Jin [15] and Fu [16] investigated the effect of fly ash dosage and DSRR on the mechanical properties of DSC.
In addition to the static mechanical properties of desert sand concrete, the dynamic mechanical properties of desert sand concrete have also been investigated.
Liu [20] and Zhang [21] tested the dynamic mechanical properties of DSC by varying the strain rate.
Thus, extreme differences are able to be used rank factors in order of impact from highest to lowest among many factors.
The mechanical properties of concrete with the DSRR of 30% are higher than those with the DSRR of 10% [19-21].
In addition to the static mechanical properties of desert sand concrete, the dynamic mechanical properties of desert sand concrete have also been investigated.
Liu [20] and Zhang [21] tested the dynamic mechanical properties of DSC by varying the strain rate.
Thus, extreme differences are able to be used rank factors in order of impact from highest to lowest among many factors.
The mechanical properties of concrete with the DSRR of 30% are higher than those with the DSRR of 10% [19-21].