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Lib and B.C.Louc School of Mechanical Engineering, Tianjin University, Tianjin 300072, China atjuzhangliang@163.com, bjli@tju.edu.cn, ctjulbc@163.com Keywords: Five-axis NC programming, Tool path planning, Mold machining, Cranioplasty Abstract.
Normal vector, tangent plane and curvature are the intrinsic properties of surface.
They are the most useful internal factor in geometry modeling and they vary from point to point in the curves and surfaces[5].
Tool axis vector is one of the most important factors affecting the processing effect.At the same time, it also affects the tools'life and the force of the machine.

Corrosion degrades the useful properties of materials and structures including strength, appearance and permeability to liquids and gases.
The pretesting included preparing composites and determining their basic physical and mechanical properties, such as: bulk density, absorbability, bending strength and splitting tensile strength.
Preliminary tests were analysed and the sulphur polymer composite having the best properties among the tested composites was selected for further studies.
The composition of the composite is given in Table 1 and its experimentally determined properties are shown in Table 2.
The tests have shown that a proper thickness of the sulphur polymer composite and the type of surrounding corrosion environment are important factors here.

The mechanical properties of the alloy mainly vary with changing silicon content.
They monitored the cut quality through measuring kerf width, edge roughness, and size of the heat affected zone.
Equation (1) is used to determine the kerf width while energy coupling factor (A), laser power (P), and cutting speed (v) are considered as variables.
Table 1 gives the properties of the composites used in the simulations and Table 2 gives the simulation data.
Properties of composites used for the simulations r (kg/m3) 2.8135 k (W/m.K) 143 Cp (J/kgK) 878 Table 2.

Table 1, a building in Beijing in the summer when the confounding factors available to send the cooling load to the air-conditioned room.
The task of air-conditioning automatic control system is to overcome these confounding factors, and maintain a certain air-conditioned room temperature, humidity and air quality.The temperature and humidity control performance not only depends on the automatic control system, but also primarily depends on the rationality of air-conditioning systems and the object properties of air conditioning.
Humidity related properties.
In addition, indoor design temperature and humidity standards are also important factors. under the conditions of ensuring the production technology and human health conditions, if the summer design temperature of the indoor air is 1 ℃ higher, it will save as much as 11.2% in energy consumption .The saving is very significant.
The amount of fresh air direct impacts on air conditioning load, thus affecting the air-conditioning system host, cooling towers, water pumps, fan coil units and other power consumption.

Control factors and their levels.
Effects of control factors of the steels are shown in Fig. 1 for means SNR, respectively.
The strongest influence on the surface roughness was exerted by factor A, followed by factors B and C.
It is observed from the Table 5 that factors A had statistical and physical significance on the surface roughness because test-F value was higher than F5 % column value, followed by the factor B, and the factor C was found.
ANOVA table for SNR indicated that the cutting-fluid (p=0.020), the depth of cut (p=0.054) and the feed rate (p=0.47) in this order, were the control factors affecting the surface finish of the component.

Thereby, it affects the accuracy and reliability of the application process.
Factors such as unstable voltage, air flow changes will affect the smoothness of the expansion line.
Sample material properties would not be changed in the temperature range.
Figure.2 Al2O3 standard measurement repeatability expansion curve 5 Conclusions The thermal expansion coefficient is one of the important physical properties of the glass.
The properties of materials have played an important role in the measurement process.

The remaining porosity will affect the sintered density of the whole body (Fig. 5).
Feltin, Tailored Fiber Placement – Mechanical Properties and Applications, Journal of Reinforced Plastics and Composites, Vol.17 No. 9 (1998) pp 774-786 [5] M.
Shen, The fabrication and properties of short carbon fiber reinforced copper matrix composites, Journal of Composite Materials, 45 (24) (2011) pp 2567-2571 [10] S.T.
Gelachov, Carbon-fibre/Titanium silicide interphase/Titanium-matrix composites: fabrication, structure and mechanical properties, Composites Science and Technology, 55 (1995) pp 255-260 [11] S.J.
Zhang, Interface characteristics and mechanical properties of carbon fibre reinforced copper composites, Journal of Materials Science, 26 (1991) pp 5762-5766 [12] T.

For various applications of resin materials, various mechanical properties must be considered, such as heat distortion temperature, elongation, tensile strength, impact strength, etc.
Hence, it is necessary to add other materials that enhance mechanical properties [1-2].
Therefore, how to improve their mechanical and mechanical properties (such as tribology properties) will become the focus of research.
The wear mechanism of polymer materials is quite complex, involving various influencing factors of the contact interface, including tribo-physics and tribo-chemicals.
Cheng, The fabrication and mechanical properties of SiC/SiC composites prepared by SLS combined with PIP, Ceram.

Vernadskogo,119526 Moscow, Russia 2 National Chung Cheng University, Department of Mechanical Engineering, 168 University Rd., Chia-Yi, Taiwan 3 National Sun Yat-Sen University, Department of Mechanical and Electro-Mechanical Engineering, 70 Lien-Hai Rd., Kaohsiung, Taiwan a lyamina@inbox.ru, b sergei_alexandrov@spartak.ru, c imeyrj@ccu.edu.tw, d ymhwang@mail.nsysu.edu.tw Keywords: friction, singularity, ductile fracture, metal forming.
At the present time, the only way to find the value of the strain rate intensity factors is to use available or new analytical and semi-analytical solutions.
Reviews of strain rate intensity factors found from such solutions are provided in [26, 27].
This factor has been overlooked in [25].
Farris, A new approach for studying mechanical properties of thin surface layers affected by manufacturing processes, J.

Conditions of Simulation and Experiment The material used in investigation was a CuZn37 alloy with a sheet thickness of 0.20mm, whose mechanical properties are presented in Table 1.
Mechanical properties of metal sheets Young modulus [MPa] Yield strength [MPa] Poisson ratio - Anisotropy coefficients Total elongation [%] 00 450 900 115000 24.55 0.3 0.725 0.848 0.888 36 Table 2.
Mechanical and deformability properties of the CuZn37 alloy The parameters of the mini drawn parts, tools, blank and deep drawing process, used in simulation and experimental tests, were as follows: part diameter (D), part edge radius (rep), tool clearance (c), punch edge radius (rp), punch diameter (Dp), die diameter (Dd), blank diameter (Db), initial foil thickness (t0), drawing depth (d), blank holder force (BHF) and friction coefficient (µ).
Optimal working parameters obtained by applying the GAs friction coefficient blank holder force [N] ring 1 ring 2 ring 1 ring 2 x(1) x(2) x(3) x(4) Dp=2.00[mm] 0.125 0.110 15 20 Dp=20.00[mm] 0.110 0.100 100 65 The geometric parameters of the mini drawn part defects generated by different factors of influence resulted by using the optimal values of the working parameters obtained from Genetic Algorithms application are presented in Table 8.
The part quality is significantly affected by the flow of metal into the die cavity, an excessive flow conducting to part wrinkling.