Today, our company (cold drawing machine manufacturer) will introduce the differences between precision drawing (cold drawing) and precision rolling (cold rolling) of pipes:
  
1. Jingba
Cold drawing is the process of elongating metal pipes using a cold drawing machine without heating. The advantage is that it does not need to be done at high temperatures, but the disadvantage is that residual stress is high and cannot be pulled too long. Cold drawing can improve toughness and tensile strength, resulting in better mechanical properties.
 
Cold drawn seamless steel pipe process:
Round tube blank → Heating → Perforation → Heading → Annealing → Acid washing → Multi pass cold drawing → Semi finished tube → Heat treatment → Straightening → Hydraulic test (flaw detection) → Marking → Storage.
 
The difference between cold drawing and cold drawing:
Cold drawing and cold drawing are two different methods of metal cold processing, and they are not the same concept. Cold drawing refers to the method of applying tension at both ends of a metal material to cause it to undergo tensile deformation; Cold drawing refers to the method of applying pulling force at one end of a material to pull it out through a mold hole, where the diameter of the mold hole is smaller than the diameter of the material. Cold drawing processing causes materials to undergo not only tensile deformation but also extrusion deformation. Cold drawing processing is generally carried out on specialized cold drawing machines. Materials processed by cold drawing have better performance than those processed by cold drawing.
Main applications: for automobiles, motorcycles, refrigeration equipment, hydraulic components, pneumatic cylinders, and other customers with high requirements for steel pipe accuracy, smoothness, cleanliness, and mechanical performance.
  
2. Precision rolling
Precision rolled steel pipe, also known as cold-rolled precision steel pipe, is a production process for seamless steel pipes.
Characteristics of precision rolled pipes:
1. Cold rolled precision steel pipes have high tolerance and dimensional accuracy, with product precision controlled within ± 0.05mm,
The inner and outer walls have good smoothness and no oxide layer on the surface.
2. Cold rolled precision steel pipes have excellent comprehensive performance, able to withstand high pressure, cold bending, expanding, and flattening without cracking or wrinkling, and can undergo various complex deformations and mechanical processing treatments.
The promotion and application of precision seamless pipes can save steel, improve processing efficiency, reduce processing procedures and equipment investment, save costs and greatly reduce mechanical processing hours, increase production volume and material utilization, and also help improve product quality and reduce costs.
The purpose of precision rolling tube:
Cold rolled precision steel pipes are widely used in various fields such as automobiles, motorcycles, electric vehicles, pneumatic cylinders, petrochemicals, electricity, ships, aerospace, bearings, pneumatic components, and medium and low pressure boilers.
The above is some professional knowledge sharing about cold rolling mills provided by our company. Zhejiang Zhongxing Steel Pipe Machinery Co., Ltd. is a professional manufacturer of mechanical equipment for seamless black and non-ferrous metal pipes. Its main products include cold rolling mills, perforating machines, cold drawing mills, straightening machines, as well as research and production of auxiliary products in pipe production, such as rollers and core rods. Welcome new and old customers to inquire and place orders! You can also log in to our company's official website to view more detailed information: iguys.cn