Manufacturability problems in the valve manufacturing process is one of the important content of the product design work, so the Industrial Valves manufacturing art must be under the processing property of valve design put forward the request. Technology of main requirements are as follows: 1) Casting (1) should be taken into account according to the characteristics of different materials and reasonable structure. Because of malleable cast iron, for example, volume shrinkage and need to be annealed heat treatment, casting size and thickness should be small, illiquid and stainless steel castings, design chosen thickness should be appropriately increased, the shape is as simple as possible. (2) wall thickness should be uniform, the node should be circular arc and the necessary slope to ensure smooth transition, and should try to avoid too much metal accumulation, lest produce defects such as shrinkage cavity, porosity and crack. (3) the air knife at the bottom of the valve body should not be too narrow and too deep, in order to make the sand core has the certain strength, air knife arc radius should not less than as far as possible according to valve size decision, to avoid impact broken when pouring core sand to make it difficult. Minimum wall thickness, (4) determine the valve body is not only to calculate according to the strength and stiffness, also consider factory casting condition and casting method, do a good quality, light weight, material. (5) must consider the mould is convenient. 2) Forgings (1) forging shape should be as simple as possible, for batch big parts should adopt die forgings. (2) the proper draft Angle, and try to avoid sharp corners and sharp edges. 3) Heat treatment (1) of the heat treatment requirements shall be according to the properties of the material reasonable choice, such as hardness and mechanical properties of high and low and provided a reasonable range. (2) easy to generate in the process of heat treatment deformation of parts should be appropriate to enhance parts of rigidity. 4) Surfacing welding, mechanical processing and assembly (1) a base thing should be considered and weldability of surfacing welding material, in order to avoid defects such as cracks, at the same time, also should choose the appropriate size of hair bad. (2) have the locating datum, facilitate the clamping and processing. (3) to facilitate measure, benchmark and the best design and processing of measured datum. (4) the design to use standard tools, clamping apparatus, standard gage create conditions, in order to reduce the process equipment homemade

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