Crankshaft forging process and method thereof

Abstract

The invention discloses a crankshaft forging process and a method thereof. The process comprises the steps of blank selection, forged blank heating, die forging formation, stress elimination, intermediate inspection, rough milling, drilling, finish milling, polishing, surface strengthening, rust prevention and injury detection. The process has the following beneficial effects: redundant blanks, clamped by manipulators for use, are reserved at two ends of blanks; the blanks are heated at high temperature to 1200 DEG C for discharging from a furnace; the manipulators clamp the redundant blanks at the two ends of the blanks in the high-temperature state, and clamp the blanks into a mold of a forging machine for forging; through clamping of the redundant blanks, the deformation phenomenon of contact surfaces between the blanks and the manipulators caused by the gravity of the blanks, the clamping force of the manipulators and the blanks in the high-temperature state can be prevented, the gap phenomenon of finished products after forging can be reduced, and the product pass percent is increased; meanwhile, the effect of saving both materials and times can be achieved; and the crankshaftforging process is better compared with a traditional forging method.

Description

technical field [0001] The invention relates to the field of crankshaft forging, in particular to a crankshaft forging process and method thereof. Background technique [0002] Forging is a method of using a forging machine to test the pressure of a metal billet heated at a high temperature, and with the cooperation of a forging die, so that the metal billet in a high temperature state is deformed to achieve the shape required by the die, and then the metal The billet is processed, polished and other processes. Through forging, the defects such as as-cast looseness produced by the metal during the smelting process can be eliminated, and the microstructure can be optimized. The compaction and welding of segregation, porosity, pores, slag inclusions, etc. make the structure more compact. The mechanical properties of forgings are generally better than castings of the same material. In related machinery, important parts with high load and severe working conditions, except Excep...

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Problems solved by technology

[0003] However, in the existing crankshaft forging process and its method, there is no extra blank reserved for clamping by the manipulator on the forged blank, because the blank has a certain gravity, and the manipulator also has a certain clamping force at the same time. When the blank is held by the manipulator, it is easy to cause deformation on the surface of the blank, which will cause defects in the forged product, greatly reduce the pass rate of the product, and waste resources and time, which will have a certain impact on actual use.

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