It is a precision cold-drawn seamless pipe with high dimensional accuracy and good surface finish for mechanical structure and hydraulic equipment. The selection of precision seamless pipe manufacturing mechanical structure or hydraulic equipment can greatly save machining hours, improve material utilization, and help improve product quality.
The difference between cold-drawn precision steel pipe and ordinary seamless steel pipe:
1, the main feature of the general ordinary seamless steel pipe is that there is no welding joint, which can withstand greater pressure. The product can be very rough cast or cold drawn parts.
2, cold-drawn precision steel pipe is a product in recent years, mainly the inner hole, the outer wall size has strict tolerances and roughness.
Characteristics of cold-drawn (rolled) precision steel pipe: 1. Smaller outside diameter. 2. High precision can be made in small batches. 3. Cold drawing (rolling) finished products have high precision and good surface quality. 4. The transverse area of the steel pipe is more complicated. 5. Steel pipe performance is better, the metal is relatively dense.
introduction
According to different production methods can be divided into hot rolled pipe, cold rolled pipe, cold drawn pipe, extruded pipe and so on. The biggest difference between cold-drawn seamless steel pipe and hot-rolled seamless steel pipe is that the precision of cold-drawn seamless steel pipe is better than that of hot-rolled seamless steel pipe, the general accuracy of cold-drawn seamless steel pipe is about 20 wires, and the precision of hot-rolled seamless pipe is about 100 wires, so cold-drawn seamless steel pipe is the first choice for mechanical processing manufacturing industry and parts manufacturing industry.
1.1, hot rolled seamless pipe is generally produced on the automatic tube rolling unit. After checking and removing the surface defects, the solid tube blank is cut into the required length, centered on the perforated end face of the tube blank, and then sent to the heating furnace for heating, and perforated on the perforating machine. In the perforation at the same time continuously rotating and advancing, under the action of the roll and the head, the inside of the tube blank gradually formed a cavity, called the capillary. It is then sent to the automatic tube mill to continue rolling. Finally, the wall thickness of the whole machine is adjusted, and the diameter is determined by the sizing (reducing) machine to meet the specifications. It is an advanced method to produce hot-rolled seamless steel pipe with continuous tube rolling unit.
