The remanufacturing of steel pipe straightening machines originated and matured in developed Western countries, and is an important form of developing modern circular economy. It is a specialized batch repair and manufacturing process for industrial waste such as discarded automobiles, engineering machinery, and machine tools. In developed Western countries, the remanufacturing industry of steel pipe straightening machines is a huge industry that is on the rise and has become an important component of the economic systems of some developed countries. As a manufacturing power ranked in the world's manufacturing industry, China produces an astonishing amount of discarded industrial products every year.

At present, the mechanical processing of steel pipe straightening machines can be divided into two categories based on production batches: one is single piece, multi variety, and small batch production (referred to as small batch production); The other type is small variety and large-scale production (referred to as large-scale production). The former accounts for approximately 70-80% of the total output value of mechanical processing, and is the mainstay of mechanical processing. Why does the production efficiency of the same machine tool differ by several times? The conclusion drawn from the steel pipe straightening machine is that the fixture used in the CNC machine tool is inappropriate, which significantly reduces the production efficiency of the CNC machine tool.

There is a gap of 0.5-1mm between the flat steel of the steel pipe straightening machine and the end face of the shaft

When the profile of the workpiece exposed by the broken machine tap is only 2-3mm, use a flat steel with a thickness of 2-3mm and a length of 150-200mm to drill a hole at 1/2 of its length (the diameter of the hole is the outer diameter of the tap), and then place the flat steel on the broken tap. Leave a gap of 0.5-1mm between the flat steel of the steel pipe straightening machine and the end face of the shaft. The steel pipe straightening machine uses electric welding to smoothly weld the broken tap and flat steel together. During welding, it should start from the center of the tap and gradually weld together with the flat steel. After the broken tap cools naturally, inject engine oil into the chip removal groove of the broken tap.

After quenching, the steel pipe straightening machine hardens the outer ring of a large rotary bearing made of 50Mn material, with a hardness of HRC55 after heat treatment and a unilateral machining allowance of 2.5mm. Due to the deformation of the 50Mn ring after quenching, the inner hole is irregularly circular, and the original cubic boron nitride blade often experiences blade breakage. In order to reduce tool breakage and loss, multiple tool passes can only be used to complete the machining, resulting in low machining efficiency, high occupancy rate of steel pipe straightening machine equipment, and increased comprehensive machining costs such as electricity and auxiliary material costs. Using non-metallic adhesive BN-S20 grade cubic boron nitride blade, the cutting depth is about 2.5mm, and the irregularity reaches 3mm.

The role of science and technology as productivity in the overall progress of the machine tool industry is not yet fully utilized. Although significant progress has been made in key technologies such as high-speed, high-precision, composite, and intelligent CNC machine tools, new progress has also been made in the development of basic technologies and new products for a number of common and steel pipe straightening machines.