manufacturability

      The design of mechanical parts, should not only make it satisfy the requirement that have the ability to work for, and at the same time should also meet the production requirements, otherwise may make not to come out, or if the can make but require a lot of labor cost material is not economic. In the specific production conditions, such as the design of mechanical parts for processing and processing cost and very low, then this part is called good manufacturability. The manufacturability of the basic requirements are: (1) blank choose reasonable mechanical manufacturing blank preparation methods: direct use of profiles, casting, forging, stamping and welding, etc. Blank choice and specific production technology conditions relevant, generally depends on lots of production, material properties and processing possibility, etc. (2) structure is simple and reasonable design parts structure shape, p good use the most simple surfaces (such as plane, cylinder, helical surface) and their combination, and at the same time should also try to make processing surface number at least and processing area minimum. (3) regulation appropriate manufacturing precision and surface roughness parts processing cost with precision and increased, especially in high precision, this increase is very significant. Therefore, in not fully according to, should not be the pursuit of high accuracy. Similarly, the surface roughness of the part and shall, according to the actual needs of the surface, with the appropriate provisions. To design the manufacturability good parts, the designer must be combined with technology staff and good to learn from them. In addition, in metal technology curriculum and the manual also provides some basic knowledge of technology, for reference.

       standardization

       Standardization refers to set standards and carry out standard as the main contents of the whole process. Standardized research field is very wide, industrial product standardization is concerned, it refers to the variety of our products, specifications, quality, inspection or for safety and hygiene and set standards and implement. Product standardization itself includes three aspects: (1) the meaning of the specifications of the products will be the same kind of product series, the main parameters, the type, size, the basic structure of step in order to make a series of products, with less variety specification meet the user's widely needs; (2) parts generalization - will be the same type or different types of products use structure or similar parts (such as bolts, bearing, coupling and reducer, etc.), after after reunification achieve universal interchangeable; (3) the product quality standard, the product quality is all enterprise "lifeline", to ensure product quality and stability must be well design, processing, assembly, inspection and packing storage and transportation links such as standardization. So, to the fierce market competition. To the products implement standardization is of great significance in manufacturing can be taking a professional production, can improve the quality of products and reduce cost; In the design of design can reduce the workload; In the management of the maintenance, can reduce inventory and replacement of the damaged parts. Mechanical parts - working ability mechanical parts all kinds of machinery and engineering structure are made by some of the components. These components work to the role of tolerance, to ensure that the components in the provision of working conditions and service life period to work, must meet the following requirements: 1, have sufficient strength to ensure that the action of external force component does not occur damage, is member can normal working condition, the strength of the component refers to the member under external force to resist the ability of destruction. 2, have enough stiffness member in the external force produced by the deformation should be allowed limits. Member under external force to resist deformation ability, is the member has the stiffness. 3, have enough stability some slender bar (or thin wall components) in the axial pressure reaches a certain value, will lose the balance of the original form and the loss of working ability, this phenomenon is called instability. The so-called stability is refers to the member to maintain the original form of the balance ability. Member of the strength, stiffness and stability and mechanical properties of the materials concerned, and the mechanical properties of materials must be experiments to test. In addition, some practical engineering problem up to now can't by theoretical analysis to solve, must rely on experimental method. The actual engineering structure, many bearing components such as Bridges, automobile drive shaft, and the houses of the beam, column, etc., the length direction is more than the size of the cross section size, this kind of components in mechanics of materials research, often referred to as the bar, bar all cross section centroid attachment, known as the rod axis, if the line is straight line, it is called rods; Axis for curve, it is known as a curved bar. All cross section shape and size of the same bar called etc cross section bar; Different person called variable cross section bar. Mechanics of materials is mainly research section rods.