1. Casting technology

melting

For the melting of high grade cast iron, large capacity medium frequency melting furnace will be used for melting, and the composition of hot metal will be detected by direct reading spectrometer. The advanced inoculation methods such as stream inoculation, in mold inoculation and compound inoculation are adopted. The parameters of melting process are controlled by microcomputer and displayed on screen.

modelling

EPC will be developed and popularized. In sand mold casting, no box injection molding and extrusion molding will be paid attention to and will continue to be popularized in new or rebuilt plants. The original high-voltage molding line will continue to be used, and some key components will be improved to realize automatic core assembly and core setting.

2. Heat treatment technology and surface strengthening technology

Medium frequency induction hardening of crankshaft

The closed-loop medium frequency electric furnace heating device with microcomputer monitoring will be used for crankshaft medium frequency induction hardening, which has the characteristics of high efficiency, stable quality and controllable operation.

Soft nitriding of crankshaft

In order to improve the quality of crankshaft in mass production, the nitrogen based gas soft nitriding production line controlled by microcomputer will be adopted in the future. Nitrogen based atmosphere gas soft nitriding production line is composed of front cleaning machine (cleaning and drying), preheating furnace, soft nitriding furnace, cooling oil tank, rear cleaning machine (cleaning and drying), control system and gas distribution system.

Crankshaft surface strengthening technology

Spheroidal graphite cast iron crankshaft fillet rolling strengthening will be widely used in crankshaft processing. In addition, compound strengthening processes such as fillet rolling strengthening and journal surface quenching will also be widely used in crankshaft processing. Journal fillet quenching will be more used in forging steel crankshaft strengthening.

Crankshaft is an important part of engine to bear impact load and transmit power. It is the most difficult to guarantee the machining quality among the five major parts of engine. Due to the bad working conditions of crankshaft, the requirements of crankshaft material, blank processing technology, precision, surface roughness, heat treatment and surface strengthening, dynamic balance are very strict.

Yiphee Electric Furnace Co.,Ltd specializes in producing induction smelting furnace.Tel(WhatsApp):+86-13450756789, yiphee@yiphee.cn