Method for preventing steel from sticking to guide plate of two-roller vertical Diesel cross-rolling piercer

Abstract

The invention provides a method for preventing two-roll vertical diesel skew-rolling perforator guiding disc from sticking steel. The method is characterized by adjusting a two-roll vertical diesel skew-rolling perforating tool, perforating hole pattern parameters, a perforating speed system, a pipe blank heating system and guiding disc cooling effect and providing corresponding control measures. The method has the effects that by virtue of the method, the accident that the guiding disc sticks the steel when novel steel and easy-sticking steel are rolled in recent years is gradually reduced year by year, the accident time is reduced from 905 minutes in 2010 to 532 minutes in 2011, 103 minutes in 2012 and to only 26 minutes at present, and the accident that the guiding disc sticks the steel can be effectively controlled. The time for the guiding disc sticking the steel is reduced, so that not only can the operation efficiency of the unit be increased and can the successful production of the unit be guaranteed, but also the intermediate misroll can be reduced, the yield of the product can be increased, and the production expense of the steel per ton can be reduced. Evidence is provided for effectively reducing the accident that the guiding disc sticks the steel in the production, the yield of the product is increased, and the operating efficiency of the unit is improved.

Description

technical field [0001] The invention relates to a method for preventing the guide plate of a two-roller vertical diesel cross-rolling piercer from sticking to steel. Background technique [0002] The two-roller vertical Diesel cross-rolling piercing machine of the MPM unit of Tianjin Pipe Group uses guide discs and piercing rolls to seal the pass. The guide discs are arranged horizontally on both sides of the perforation center line, together with the upper and lower perforation rollers and the plug, they form the deformation zone. [0003] In the process of piercing production, the phenomenon of guide plate sticking to steel often occurs. The phenomenon of guide plate sticking to steel is due to the combination of factors such as high temperature, high pressure and friction when the guide plate is in contact with the perforated blank in a high temperature state during the piercing time. The effect causes the false welding phenomenon similar to the pressure welding in the l...

AI Technical Summary

Problems solved by technology

The heavy guide plate sticking steel not only causes downtime accidents, reduces the operating rate of the unit, but also produces helical scratches on the whole body of the capillary tube. After rolling by the continuous rolling and sizing unit, a helix opposite to the pitch direction is formed on the surface of the finished tube. Outward folding or scarring

Slight outward folds or external scars need to be ground off-line, and serious failure to grind will result in waste products, which will have a significant impact on the yield, so it is of great significance to solve the problem of sticking steel on the guide disc