Casting method and tooling of white metal crosshead slider for large low-speed marine diesel engine

Abstract

The white alloy casting method and tooling of the crosshead slider for large low-speed marine diesel engine is to put the L-shaped tire board and the crosshead slider integrated with the long plate and the short plate on the casting platform, and the inner surface of the long plate slides with the crosshead. The front of the block is separated from the cavity, and the inner surface of the tail of the short board is in contact with one end of the cross head slider. The baffle and the stopper are placed on the tail of the long board of the tire board and combined with the bayonet for installation and positioning, and the screw rod of the fastening rod The part is matched with the screw hole of the block, and the front end of the fastening rod is pressed against the baffle. The inner surface of the long plate, the inner surface of the short plate, the front of the crosshead slider and the top of the casting platform form a combined cavity; the white metal melt is cast and formed, and cooled to solidify with the front of the crosshead slider. The decompression groove quickly releases the internal liquid pressure to slow down the leakage speed, and at the same time, the liquid white metal quickly solidifies in the decompression groove, thereby preventing leakage to the outside of the tire plate. Effectively avoid shelling, porosity, slag inclusion and other defects, and improve the bonding quality of white metal.

Description

technical field [0001] The invention relates to a white metal casting and connecting forming method for composite white metal body at the front end of a crosshead slider of a large-scale low-speed marine diesel engine. Background technique [0002] The crosshead slider is an important part of the marine diesel engine. Its service conditions are complex. The main function is to ensure that the piston rod and the crosshead move vertically up and down in the marine diesel engine frame. The slider body is made of cast steel. In order to make it move more smoothly and reduce friction, white alloy is cast on its contact surface with the frame. White alloy has comprehensive mechanical properties such as good wear reduction and corrosion resistance, and is widely used as surface laying material for sliding bearings of large and low-speed marine diesel engines. The traditional casting method has extremely unstable casting quality, white alloy liquid leakage often occurs during the c...

AI Technical Summary

Problems solved by technology

The casting quality of the traditional casting method is extremely unstable, white metal liquid leakage often occurs during the casting process, and it is very easy to cause shelling, pores, slag inclusions and other defects

Images