Valve ball is used to control fluid flow in the fluid pipelines, because of the valve ball structure is simple, easy installation and maintenance, sealing performance, no internal leakage, small size, etc., much market users. Different valve ball forging rough machining method is different, then the valve ball forging rough concrete what, this small series for you to interpret.
1. Press the ball when the rough temperature forging points:
(1) hot forging: the billet heated to a certain temperature and then forging called hot forging.
(2) Cold Forging: forging at room temperature forging called cold forging. Forging equipment required for cold tonnage larger. Cold Forging can obtain higher accuracy and strength, as well as a more polished surface forgings.
(3) Warm Forging: The heating temperature of the billet is less than the temperature of hot forging. The required equipment tonnage forging cold forging, forging strength and rough surface forgings, is currently being developed in the process of a new technology.
2. Press the sphere blank force points
(1) hand forging processing: rely on hand forging tool box manpower hit, in the anvil on the rough forging into a predetermined shape forgings.
(2) machine forging: relying on forging tools in a variety of forging equipment will be made of forgings blank. Machine forging by the use of different equipment and tools, but also can be divided into free forging, forging, fetal membrane forging and special forging four categories:
â‘ free forging: it is heated to a certain temperature of the metal blank on the free forging equipment between the upper and lower anvil forging, by the operator to control the deformation of the metal to obtain the desired shape forgings.
â‘¡ model forging: referred to as forging. It is to be heated to a certain temperature of the metal blank placed in the mold forging equipment on the mold cavity forging and limiting its deformation, so as to obtain the die cavity consistent with the production of forgings.
â‘¢ fetal membrane forging: referred to as fetal membrane forging. It is a variation between free-forging and forging that takes a metal blank that has been heated to a certain temperature and a shaped forging obtained by a free-forging process through a non-fixed film on a free-forging device.
â‘£ special forging: it is a special equipment or special mold to form a metal blank forging process. Such as precision forging, roll forging rolling, rolling ring, spiral oblique rolling, horizontal rolling, extrusion and so on.
The above is the valve ball forging rough machining methods, hope to help you understand and learn.
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