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Research on Cone Angle of Cutter Head for Big Diameter Shaft  with Analysis of  Drilling Mechanics Zhenhui Luana, Lianjie Caib Mechanical Engineering school, Anhui University of Science and Technology, Huainan China azhluan@aust.edu.cn, bchildjicy@163.com Keywords: cutter head; cone angle; slurry; cuttings Abstract.
The aspect of rock breaking Since the advent of rotary drilling, rock breaking mechanism basically hasn’t change, mainly relies on mechanical resilience to break the rock[3].
Furthermore, when exerting the role of the static and dynamic load, the changing tends of the crushing mechanism, morphology, and mechanical properties of the rock are similar[4].
On the one hand, it will waste a lot of power, on the other hand, it will affect the drilling speed.
Comprehensively consider all kinds of factors, the paper suggests to select α=35°~45°, that is β=90°~110°

Design of Steam Heated drying line- Finned tubes Wenjin Kang 1, a, Deqi Peng 1,b 1 Xiangtan University Mechanical Engineering College,Hunan,411105, China a79488485@qq.com, b penghuaike@163.com Key words:Steam Heating Model, Steam drying and Finned tubes.
Fig.4 Fin thickness and fin height to affect the heat transfer unit volume The impact of convective heat transfer coefficient of the outer tube shown in Figure 5.
b. on the optimal geometry of the finned tube is analyzed to obtain the optimal relation between the fin height and other factors.
Fan.Thermodynamic Properties of Water and Steam chart [M] Beijing: China Electric Power Press, 1997.
Mechanical Design Handbook Beijing: Mechanical Industry Press, 2010.

Spindle performance directly affects the accuracy, stability and range of machining system and applications, thermal characteristics of which has a crucial role during processing.
For spindle thermal properties of a number of scholars at home and abroad have carried out some research.
International Mechanical Engineering Congress and Exposition, Anaheim, CA, USA, 1998
Research on motorized spindle’s thermal properties based on thermal contact.
Thermo-mechanical model of spindles.

The mechanical tensile testing machine (Perkin Elmer Diamond SII DMA), equipped with 18 N load cells, was used for measuring the mechanical properties of the hydrogel.
The reason may be that the polymer chains are highly entangled and resistant to deformation when hydrogel is in the unswollen state, but when the hydrogel is in the swollen state, influxing by the buffer ion and water molecule, its distance between polymer chains get bigger and chains became disentangled, it can’t resist the deformation, which result in the lower mechanical properties.
The Young’s modulus value is also affected by the environment ionic strength, as to the same pH value level, the higher ionic strength is, the higher Young’s modulus value is.
Conclusion The mechanic feature of the hydrogels both sensitive to pH and electronic field strongly depends on the equilibrium swelling ratio, that is the pH value of the solution, increasing the pH value, the mechanic feature of the hydrogel would decrease, which the largest span can reach 80%; The hydrogel would change its volume with adding the electronic field, when increasing the DC value, the swelling ratio would decrease, and the ionic strength is another factor that affects the equilibrium swelling ratio, the higher the ionic strength is, the bigger the decreased span is.

It was found that stirring strongly affected the quality of the film.
Especially stirring velocity affected the distribution of diamond grains.
It has been reported that the key factors which affect the quality of electrotyping are the composition of electrolytic solution, the electric current density of cathode, PH value, temperature, the distance between cathode and anode, the pretreatment of motherboard cathode, etc. [1－4] In this paper, the experimental results of electrodeposited diamond grains-metal composite film were reported.
This result suggests that the combinative mode between diamond grains and nickel is mechanical bond.
The density of the diamond grains in the film was greatly affected by the stirring velocity.

Moreover, its mechanical properties can be improved by heat treatment process.
Initial experiment Taguchi experiment Experiment affect Figure 1.
Designing Taguchi experiment [6] to indicate variable level suitable for machining AISI P20 mold steel material can be divided into 3 factors and 3 levels as shown in experiment plan in figure 1.
Comparison of workpiece surface and electrode a) Machining performance b) Affect of Performance Figure 7.
Performance and Affect from machining on mold steel AISI P20 Depth 50 mm.

Introduction Microstructural restoration processes of deformed materials, like recovery and recrystallization, have significant impact on the mechanical properties of the materials.
Therefore, these softening processes are of great scientific and technological interest in particular with regard to thermo-mechanical processing [1].
On the other hand, pre-aged deformed microstructure may affect the kinetics of the recrystallization, and consequently result in different behavior.
This affected the change in hardness in the 10-cycle ARB process (Fig. 1) [7].
- The microstructure and consequently the hardness of the specimens are controlled by various factors including recrystallization, grain growth and re-precipitation at around 300°C in a complicated manner

Introduction The application of the coal belt conveyor in coal mine became more and more popular these days because its properties of high efficiency, safety, easy to control, economic and durable, easy maintenance.
So in this occasion, it is not only a huge waste of human resources, but also the negative factors affecting production efficiency.
And when the auto mode can not run, you can manually start belt conveyor, without affecting the conveyance of the coal.
However, to the coal drop in local position, it’s not only necessary to accurately adjust the Coal Chute, and other mechanical position, install anti-blocking, anti-heap of coal, anti-coal drop sensors, but also reproduced conversion funnel in the junction of the tapes and installed obstacles around the coal when it was needed.

Introduction The coated tool is widely used in the cutting process owing to the benefits of good properties ,however some studies observed coating flaking and gaps between the coating and substrate after machining which affected the life of tool seriously[1].
The heat capacity of plastic deformation can be expressed [6]as Eq. (1) (1) where is the plastic work conversion factor, and is the plastic stains rate tensor.
The position will affect the damage of the tool greatly where special attention should be paid to insure enough bond strength between coatings and substrate.
The highest shear stress occur in the interface between coating and substrate in the highest speed which indicates cutting speed affect the crack of coated tool greatly.
Nouari, Finite element modeling of the thermo-mechanical behavior of coatings under extreme contact loading in dry machining, Surface & Coatings Technology 205 (2011) 3559–3566

By determining the damping properties of structures, the vibration and movement of structures can be controlled.
Very little published data exist on the vibration loss or resistance factors of composite sandwich plates.
Results and Discussion Nine foam-core sandwich plates were tested to determine the vibration mode and damping properties.
It can be seen from Fig. 2 that sandwich plates made by different fabrication processes give different damping properties.
It can be seen from Fig. 3 that fabrication process has a moderate effect on damping properties composite plates.