Seamless steel pipe inner bore cutting and processing equipment as well as method for processing the same

Abstract

The invention relates to a machining equipment of a seamless pipe inner hole and a processing method thereof, which is mainly used for machining the seamless pipe, the inner hole of which has crack or burn. The machining equipment comprise a head end box, a main motor, a first recycle pump, a cutting liquid tank, a cutting trolley, a ground rack, a drive mechanism which drives the cutting trolley to do straight reciprocating motion along the ground track, a core pin and a machining cutter which is arranged on one end of the core pin. The main motor drives the core pin to rotate by a gearing in the head end box; the core pin comprises multiple sections of rod sections and multiple sections of sizing sections; the sizing sections and the outside diameter of the rear end of the cutting cutter are matched with the inner diameter of the machined seamless pipe; a movable core pin support is arranged below the core pin; the cutting trolley is provided with the seamless pipe support below the seamless pipe. The machining equipment has high production efficiency, low production cost, reasonable structure, can repair the scrapped seamless pipe, and can effectively eliminate the crackle and turn on the surface of the inner circle, increases the smooth finish of the surface of the inner hole and increases corrosion resistance performance.

Description

technical field [0001] The invention relates to a cutting processing equipment for the inner hole of a seamless steel pipe and a processing method thereof. Background technique [0002] The seamless steel pipe produced by the seamless steel pipe factory has cracks or burns on the pipe wall and the depth is greater than the standard specified value. After ultrasonic flaw detection or eddy current flaw detection, it is a substandard product. For seamless steel pipes with cracks or burns on the outer surface, methods such as polishing, grinding or cutting can be used to repair the cracks or burns on the outer surface to meet the requirements of qualified products. However, for cracks or burns on the inner surface, since the length of the seamless steel pipe is generally more than 8m, the crack depth is generally about 0.2-1.00mm, and the cracks on the inner surface are difficult to remove, especially for seamless steel pipes with an outer diameter of less than 80mm. Steel pipe...

AI Technical Summary

Problems solved by technology

However, for cracks or burns on the inner surface, since the length of the seamless steel pipe is generally more than 8m, the crack depth is generally about 0.2-1.00mm, and the cracks on the inner surface are difficult to remove, especially for seamless steel pipes with an outer diameter of less than 80mm. Steel pipes are mostly used as chemical pipes or high-temperature and high-pressure steam pipes, etc. The seamless steel pipes with cracks or burns on the inner surface are easily corroded by various media (acid, alkali, high-temperature steam) during use. , easily lead to safety accidents

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