The crankshaft is the most important component in the engine. It takes the force from the connecting rod and converts it into torque through the crankshaft output and drives other accessories on the engine. The crankshaft is subjected to a centrifugal force of a rotating mass, a cyclically varying gas inertial force, and a reciprocating inertial force to cause the crankshaft to undergo a bending torsional load. Therefore, the crankshaft is required to have sufficient strength and rigidity, and the journal surface needs to be wear-resistant, work evenly, and have good balance.

What enhancement techniques are there in the crankshaft machining process?

Crankshaft medium frequency induction hardening
The medium frequency induction hardening of the crankshaft will adopt the microcomputer monitoring closed-loop medium frequency induction heating device, which has the characteristics of high efficiency, stable quality and controllable operation.

Crankshaft soft nitriding
For high-volume production of crankshafts, in order to improve product quality, a microcomputer-controlled nitrogen-based atmosphere gas soft nitriding line will be used in the future. The nitrogen-based atmosphere gas soft nitriding production line consists of a front washing machine (cleaning and drying), a preheating furnace, a soft nitriding furnace, a cooling oil tank, a post-cleaning machine (cleaning and drying), a control system, and a gas-making gas distribution system.

Crankshaft surface strengthening technology
Ductile iron crankshaft fillet rolling strengthening will be widely used in crankshaft machining. In addition, the composite strengthening process such as round roll rolling strengthening and journal surface quenching will also be applied to crankshaft machining. Forging steel crankshaft reinforcement will be more The ground is treated with a journal and rounded corners.