Different processing methods of stainless steel pipe fittings, processing elbows, when tapping to the thread to meet the size, may cause the two tap end faces to collide, the reason is that the tap base surface is longer.

In this case, it is necessary to shorten the end face of the tap, but the end face may be worn down, which may adversely affect the function of the tap. The relationship between the tap front end and the rear tap and the workpiece to be machined can be seen. After the end face is ground, the tap thread portion cannot be normally introduced into the hole, but is pressed into the hole by the end face, thereby affecting the function of the tap.
On the furnace rolling mill, the thermomechanical history of the stainless steel stamped elbow fittings varies significantly over the entire length, especially in the production of micro-stainless steel stamped elbow fittings, which will strongly affect the degree of recrystallization and grain growth on the finishing mill. Precipitates and causes dramatic changes in the ultimate microstructure and function of the entire stainless steel stamped elbow fitting length. Always maintain the original geometry of the front guide when grinding, preferably with a tap shovel grinding machine. The best way to solve the longer base length of the tap is to customize the tap with a shorter base according to the specific requirements of the thread being machined.

In order to solve these problems, some users have to repair the tap front guide portion themselves, and trim the front and rear tap front guides. Because the shape of the front guide after grinding changes, it still affects the function of the tap. The solution to this problem is the furnace rolling mill: the furnace rolling mill includes a reciprocating roughing mill and a 4-roll reciprocating finishing mill. Two hot coil mills were installed on the conveyor line on both sides of the finishing mill. The output roller table typically includes a laminar flow cooling system and a take-up station.