Molybdenum plug for efficient punching of seamless steel pipe

Abstract

The invention relates to the technical field of seamless steel pipe production, in particular to a molybdenum top for efficient perforation of seamless steel pipes, which comprises a top rod, a first cooling water flow channel is formed in an inner cavity of the top rod, a connecting groove communicated with the first cooling water flow channel is formed in one end of the top rod, and a matched connecting block is arranged in an inner cavity of the connecting groove in a sleeving manner; the end, away from the ejector rod, of the connecting block is provided with an integrally-formed ejector head, and the end, away from the ejector rod, of the ejector head is provided with an integrally-formed second inserting hole. Compared with the prior art, the problems that a traditional piercing plug and a traditional ejector rod are generally in threaded connection, the plug and the ejector rod often need to rotate during piercing, and therefore the direction of threads needs to be set to be opposite to the rotating direction to ensure that the plug cannot be separated from the ejector rod during use; therefore, the problems that the ejector head is tightly screwed with the ejector rod after being used, the ejector head is difficult to dismantle, the condition of thread slipping is easily caused, and the ejector rod and the ejector head cannot be dismantled are solved.

Description

technical field [0001] The invention relates to the technical field of seamless steel pipe production, in particular to a molybdenum plug for efficient perforation of seamless steel pipes. Background technique [0002] Seamless steel pipes have a hollow cross-section and are widely used as pipes for transporting fluids, such as pipes for transporting oil, natural gas, gas, water, and certain solid materials. Compared with solid steel such as round steel, the steel pipe is lighter in weight when the bending and torsional strength is the same. It is an economical cross-section steel and is widely used in the manufacture of structural parts and mechanical parts, such as oil drill pipes, automobile transmission shafts, and bicycles. Frames and steel scaffolds used in building construction, etc. are made of steel pipes to make ring parts, which can improve material utilization, simplify manufacturing processes, save materials and processing hours. Steel pipes have been widely use...

AI Technical Summary

Problems solved by technology

The working condition of the piercing plug is quite harsh. Not only must it bear strong axial pressure, but also overcome the strong deformation friction generated between it and the inner wall. The traditional piercing plug and the ejector rod are generally connected by threads, and the plug and the The ejector rod often needs to be rotated, so the direction of the thread needs to be set to be opposite to the direction of rotation to ensure that the plug will not be separated from the ejector rod during use. Because of this, the screw connection between the plug and the ejector rod is tight after use, making it difficult to remove , It is also easy to lead to the situation of thread slipping, which will cause the ejector pin and the plug to be unable to be removed, and cause the ejector pin to be scrapped.

Images