The world No. 1 in crude steel production steel plant, over 70% of the HSS for bar and wire are from us.

LMM GROUP main products focus on the cold and hot plate & wide strip mill rolls and heavy section mill rolls and big casting & forging pieces.

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Roll die stretch of metal wire


As we all know, the traditional production method of metal wire is integral die drawing. This method is relatively simple, but there are many shortcomings. The friction force in the deformation area is large, and a large amount of energy is consumed, which greatly affects the deformation process. In order to reduce the stretching friction, different stretching processes have been investigated, including reverse stretching, vibration stretching, rotating vibratory die stretching, different hydrodynamic friction stretching, and possible combination.

However, a faster and more promising method in recent years is roll die drawing. The essence of roll die stretching is to stretch the wire in a hole formed by a non-driven, freely rotating roll. Its characteristic is that most of the friction between the material and the die hole when the whole die is stretched is converted into the external friction of the bearing, thereby greatly reducing the stretching friction. The manufacture of the integral drawing die requires the use of special cemented carbide materials, while the manufacture of the roller die only needs to use ordinary metal materials, and the speed of drawing the titanium wire is 2 to 4 times that of the integral die drawing. As early as 1890, Western countries used four-roll hole die for the production of special-shaped profiles. At present, the use of roll die drawing in the production of wire rods is quite common, and the varieties, specifications and cross-sectional shapes of the produced wire rods are various. Among them, there are more than 600 occasions using this method to produce wire rods in Japan alone. This is because the method combines the advantages of two commonly used deformation processes (rolling and stretching).

Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.

A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.

Always a pre-production sample before mass production;
Always final Inspection before shipment;
During the epidemic, provide remote detection technical support

Tell us a little about your application and we’ll get back to you to finalize a quotation to meet your needs as quickly as possible.

Rolling mill rolls product

Classification by roll material:

Cast iron mill rolls

  • Alloy indefinite chilled cast iron rolls
  • Alloy chilled cast iron rolls
  • Alloy SG ductile cast iron roll
  • Pearlitic ductile cast iron roll
  • Bainite ductile cast iron roll
  • Centrifugal cast iron roll

Cast steel mill rolls   

  • Alloy cast steel rolls
  • Semi-steel roller
  • Graphite steel rolls
  • High-chromium steel roll
  • High-speed steel roll

Forging mill rolls

Sort by position on the rolling mill:

Work rolls
backup rolls

Intermediate roll

Product advantage

The world No. 1 in crude steel production steel plant, over 70% of the HSS for bar and wire are from us.

LMM high-speed steel rolls have higher steel passing per groove (times) due to their good wear resistance, which saves roll changing time, improves rolling mill operation rate, reduces roll consumption, and improve the overall efficiency of the factory.
Generally, the amount of steel passing in a single groove (times) is 3 to 5 times that of cast iron rolls.

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