Mechanical Design
Abstract:梦见下小雨是什么征兆A machine is a combination of mechanisms and other components which transforms, transmits. Examples are engines, turbines, vehicles, hoists, printing press, 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 ud in a broader n 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, vesls, and mixers.
文明交通安全出行手抄报内容Keywords: Mechanical Design ；Rules for Design ；Design Process学前教育史
The Design Process
Designing starts with a need real.Existing apparatus may need improvements in durability,
efficiency, weight, speed, or cost. New apparatus may be needed to perform a function previously 诚笃done by men, such as computation, asmbly, or rvicing. With the objective wholly or partly.保护法
节后收心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 nd to stops up the innovation the mentality. Usually, must propo veral ts of design proposals, then perform the comparison. Has the possibility very much in the plan which finally designated, has ud certain not in plan some ideas which accepts.
撤回上诉缠怎么读When the general shape and a few dimensions of the veral 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 ction, together with a balance between the strengths of the veral components. Materials and their treatment will be chon. The important objectives can be attained only by analysis bad upon the principles of mechanics, such as tho 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 analys may be made by the same engineer who conceived the arrangement of mechanisms, or, in a large company, they may be made by a parate analysis division or rearch group. Design is a reiterative and cooperative process, whether done formally or informally, and the analyst can contribute to phas other than his own. Product design requires much rearch and development. Many Concepts of an idea must be studied, tried, and then either ud or discarded. Although the content of each engineering problem is unique, the designers follow the similar process to solve the problems.
Product liability suits designers and forced in material lection, using the best program. I
n the process of material, the most common problems for five (a) don't understand or not u about the latest application materials to the best information, (b) failed to foree and consider the reasonable u material may (such as possible, designers should further forecast and consider due to improper u products. In recent years, many products liability in litigation, the u of products and hurt the plaintiff accud manufacturer, and won the decision), (c) of the materials ud all or some of the data, data, especially when the uncertainty long-term performance data is so, (d) quality control method is not suitable and unproven, (e) by some completely incompetent persons choo materials.
Through to the above five questions analysis, may obtain the questions is does not have the sufficient reason existence the conclusion. May for avoid the questions to the questions rearch analys the appearance indicating the direction. Although us the best choice of material method not to be able to avoid having the product responsibility lawsuit, designs the personnel and the industry carries on the choice of material according to the suitable procedure, may greatly reduce the lawsuit the quantity.
