机械类英语论文及翻译

机械类英语论文及翻译 Standardization of sany group #QS8QHH-HHGX8Q8-GNHHJ8-HHMHGN#

附录一:

Mechanical Design

Liqingyu zhangjiaMachinery manufacturing equipment design

Abstract

A machine is a combination of mechanisms and other components which transforms, transmits. Examples are engines, turbines, vehicles, hoists, printing presses, washing machines, and movie cameras. Many of the

principles and methods of design that apply to machines also apply to manufactured articles that are not true machines. The term "mechanical design" is used in a broader sense than "machine design" to include their design. the motion and structural aspects and the provisions for retention and enclosure are considerations in mechanical design. Applications occur

in the field of mechanical engineering, and in other engineering fields as well, all of which require mechanical devices, such as switches, cams, valves, vessels, and mixers.

Keywords: Mechanical Design ；Rules for Design ；Design Process

The Design Process

Designing starts with a need apparatus may need improvements in durability, efficiency, weight, speed, or cost. New apparatus may be needed to perform a function previously done by men, such as computation, assembly, or servicing. With the objective wholly or partly.

In the design preliminary stage, should allow to design the personnel

fully to display the creativity, not each kind of restraint. Even if has

had many impractical ideas, also can in the design early time, namely in front of the plan blueprint is corrected. Only then, only then does not

send to stops up the innovation the mentality. Usually, must propose

several sets of design proposals, then perform the comparison. Has the possibility very much in the plan which finally designated, has used

certain not in plan some ideas which accepts.

When the general shape and a few dimensions of the several components become apparent, analysis can begin in earnest. The analysis will have as

its objective satisfactory or superior performance, plus safety and

durability with minimum weight, and a competitive cost. Optimum proportions and dimensions will be sought for each critically loaded section, together with a balance between the strengths of the several components. Materials and their treatment will be chosen. These important objectives can be attained only by analysis based upon the principles of mechanics, such as those of static for reaction forces and for the optimum utilization of friction; of dynamics for inertia, acceleration, and energy; of elasticity and strength of materials for stress and deflection; of physical behavior

of materials; and of fluid mechanics for lubrication and hydrodynamic drives. The analyses may be made by the same engineer who conceived the