Search results

The decision of the strategy that will be followed can affect the accuracy, the surface finishing, the forming forces, etc.
The factors that affect the accuracy are shown in [9], as well as some strategies to improve it.
· External surfaces of forming tool were meshed with shell elements in combination with a rigid material defined with steel material properties
But during the development of this work some other factors have been detected and should be taken into account.
Conclusions Tool path generation is one of the most important factors that must be taken into account in ISF process, because of the effects on the final formed shape.

The design of pine furniture is not only an art design based on the appearance of the pine timber, but also a technical design of its material properties.
As for the structural design of the pine furniture, it should be took into full consideration pine’s physically mechanical properties and its performance in procession，compared with other commonly-used timbers, it has a feature of more softness, bigger coefficient of shrinkage and swelling, and relatively low target of the mechanical strength; Therefore, pine furniture design can be considered as a solid-wood furniture design of a special wood species.
In addition, the pine timbers in the use of furniture-making are different in properties form each other as a result of the difference of their species, the condition under which they grow, and property-changing handling (such as skim-handling, and drying-handling, etc.), even if they belong to a same family.
Compared with other kinds of limbers, all of the pines share some common properties, while the product design of a certain kind of pine is different from each other.
Pine wood’s characteristic that its texture features are different in the different texture direction of cross-striations, radial, and tangential, etc. can be considered as one of the form-design factors.

Copper and magnesium strengthen the alloy matrix and improve the mechanical properties and alloy machinability.
Heat treatment is one of the major factors used to enhance the mechanical properties of heat-treatable Al-Si alloys, through an optimization of both solution and aging heat treatment given to these alloys.
Table 2 Factors and Their Uncoded Levels No.
Eutectic silicon morphology, viz., particle size and shape, plays an important role in determining the mechanical properties of Al-Si alloy castings.
The silicon particles, appearing as coarse, acicular needles under normal cooling conditions, act as crack initiators, lowering the mechanical properties.

Whether the performance of corona discharge is good is a key factor for dust removal.
The experiment content is as follows: (1) to measure different characteristics of spray of different atomizing nozzles by taking water as the working medium; (2) to study on the discharge current affected by water mist; (3) to choose an optimal nozzle which has a good combination property.
Droplet diameter affected by water pressure (a) Solid nozzle (b) Hollow nozzle Fig.4.
Fig.6 Collection efficiency affected by solid nozzle Fig.7.
Collection efficiency affected by hollow nozzle Fig.8 shows dust removal efficiency affected by the dust particle size.

Currently, there are a few scholars who have researched the mechanism about production of the shrinkage cavities at boss extrusion process of sheet metal and some factors which can affect the shrinkage cavities.
However, there is no further overall research on the impact factors to the shrinkage cavities.
The metal materials of this region can flow to center axis of symmetry, however, with the increase of deformation degree, the surplus materials will be less and less between the punch-dies and flow properties of materials is gradually weakened to makes materials at surrounding of the die flow to the center difficultiy.
In order to eliminate influence of some factors and to make simulation results comparable, it keep the relative extrusion capacity same, which means that keep the ratio of blank thickness and primitive blank thickness same and the ratio is 50% in following.
Pc stands for the value of pressure that counter force affected on the sheet.

The phenomenon of rain-wind-induced vibration has been simplified abstractly based on the way of theoretical analysis , and the mechanical model is established .
The relationship between the system parameters and the amplitude of the cable . 1) Fig8 shows : the cable structure amplitude increases with the increase of the density ratio , which presents nonlinear characteristic , this illustrates density is one of the influence factors of the cable structure amplitude , the cable,s density unchanged in the completed cable structure of the cable-stayed bridge , and the rivulet,s density will be affected by the natural environment factors , such as rain and wind .
Now there is no good way to control the cable,s vibration by control the density ratio of the rivulet and the cable . 2) In fig 9 , the viscosity coefficient between the cable and the rivulet is also one of the key factors of the cable structure amplitude .
Then analysis the effect of density ratio , viscosity and other parameters on the cable amplitude , and obtain these parameters are the key factors of the cable amplitude under rain-wind-induced vibration
[2] Kingsbury N.A dual—tree complex wavelet transform with improved Orthogonally and symmetry properties[J].

Surface integrity can be influenced by mechanical, metallurgical, chemical and geometrical changes that can limit a component quality.
As an example, fatigue life is significantly influenced by surface [4]; the fatigue life of a machined component is affected by its roughness and superficial mechanical alterations, namely residual stresses, microcracks and white layer.
Superficial strain hardening induced by machining processes is another feature affecting the surface integrity of a component.
These figures are not always unfavorable, under some conditions surface alterations may lead to increased mechanical properties [5,6].
Another interesting aspect related to the surface integrity is the tool wear; in particular, a correlation between tool wear and superficial properties, evaluated in terms of superficial strain hardening and surface roughness, was studied by some authors [15-18].

The affected factors of bearing performances rather complicated, such as design structure parameters, manufacturing precision of bearing parts, in addition, lubrication conditions, installation accuracy and so on.
The properties (e.g. vibration, temperature rise and speed) and the parameters (e.g. test time and motor current) were automatically controlled by a computer.
So it showed, in a certain temperature range, that temperature rise did not affect on the vibration values of coatings bearing.
Therefore, the coated bearing has good temperature properties.
Effect of N2 partial pressure on the microstructure and mechanical properties of magnetron sputtered CrN films[J].

The slips on packer play an important role on supporting packer and locking rubber tube after they have been anchored, and their performance directly affects the oil yield and production safety.
In order to grasp failure causes and influencing factors of slips packer and casing accurately, and improve their effectiveness, it is quite necessary to analyze their stress status under working conditions.
The contact between slip and casing inner wall is defined as general contact, its property is penalty function with the friction coefficient is 0.15; the contact between slip and upper cone body is defined as the surface-to-surface contact without friction.
Li, Mechanical analysis of tubing string in fracturing operation, The Open Petroleum Engineering Journal. 6 (2013) 12 - 24

And the surface conditions, especially the wettability, also greatly affect the movement of the impacting droplet [1].
The model suggested that a hysteretic tension, γ, should be introduced to guarantee mechanical equilibrium at the contact line on a rough solid surface shown in Fig. 2.
According to the forces balance on the contact point, advancing and receding dynamic contact angles are: ( 7(4) (8 )(5) where , which is related to the effect of the solid surface properties.
The dimensionless spread factor, the dimensionless height of droplet and the droplet shapes were compared with the experimental data.
In present theoretical model, a correction factor is used to estimate the wetting effect.