Large forgings free forging open die forging
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Large forgings free forging open die forging

Large forgings free forging, in modern industrial production, machine free forging has become the main method of forging production, in heavy machinery manufacturing, it has a particularly important role, free forging is mainly used for the production of various large forgings, the use of ships, electricity, water conservancy, machinery and so on

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Product Description

The tools and equipment used in free forging are simple, universal and low cost. Compared with casting blank, free forging eliminates shrinkage cavity, shrinkage porosity, porosity and other defects, so that the blank has higher mechanical properties. Forgings are simple in shape and flexible in operation. Therefore, it is particularly important in the manufacture of heavy machinery and important parts.


The basic procedures of free forging are upsetting, drawing, punching, mandrel reaming, mandrel drawing, bending, cutting, dislocation, torsion, forging and so on. In order to complete the basic process to make the billet pre-produce a certain deformation of the process is called the auxiliary process, such as ingot to edge, prepressing clamp, subsection indentation, etc.


Scope of use of forgings

Forgings for industrial use refer to civil industries such as machine tool manufacturing, agricultural machinery, agricultural tools manufacturing and bearing industry. Forgings for hydro-generator, such as spindle and intermediate shaft, etc. Forgings for thermal power stations, such as rotors, impellers, protection ring spindles, etc. Metallurgical machinery, such as cold roll, hot roll and miter gear shaft, etc.



Forgings for pressure vessels, such as cylinders, cauldron flanges and seals. Marine forgings, such as crankshaft, tailshaft, rudder shaft, thrust shaft and intermediate shaft, etc. Forging machinery equipment, such as hammer head, hammer rod, hydraulic press column, cylinder block, wheel and shaft press machine column and cylinder block, etc. Module forgings, mainly hot die hammer forging die.

Forgings used in the automotive industry, such as left and right steering knuckles, front beams, couplings and so on, according to statistics in the automobile, forgings account for 80% of its quality. Forgings for locomotives, such as axles, wheels, plate springs, crankshafts of locomotives, etc. According to statistics, forgings account for 60% of their mass in locomotives.

Forgings quality control is the regular measurement and inspection of the variable parameters and geometric dimensions, surface quality and mechanical properties of forgings in production. And the measured results are compared with the standard and technical requirements, in order to determine whether it is necessary to change some factors in the forging production process, to achieve the quality control of the forging, to ensure that the final quality of the forging does not exceed the requirements of the ordering unit technical conditions.

This is the free forgings produced by tong Xin Precision forging company, ready to be sent to customers:

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