機(jī)械設(shè)計(jì)外文翻譯-機(jī)械設(shè)計(jì)(已修改)
2025-02-04 06:03 本頁(yè)面
【正文】 蘭州交通大學(xué)畢業(yè)設(shè)計(jì)（論文） 1 Mechanical Design Abstract A machine is a bination of mechanisms and other ponents 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 Design Process Design Rules Mechine Design 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 putation, 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 parison. 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 ponents bee 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 petitive cost. Optimum proportions and dimensions will be sought for each critically loaded section, together with a balance between the strengths of the several ponents. 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 蘭州交通大學(xué)畢業(yè)設(shè)計(jì)（論文） 2 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 arrangement of mechanisms, or, in a large pany, they may be made by a separate analysis division or research group. Design is a reiterative and cooperative process, whether done formally or informally, and the analyst can contribute to phases other than his own. Product design r
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