High QualityCold Drawn Tubes
Discover the Advantages of Cold Drawing for Seamless Tube Manufacturing
مهندسی دقیق، یک گام فراتر
شرکت افرا زمرد آسیا یکی از تولیدکنندگان پیشرو لوله‌های دقیق و سیلندری به روش کشش سرد با کیفیت بالا است. ما جهت رفع نیاز تولید‌کننده‌های کشور خود را متعهد به تولید لوله‌های سیلندری دقیق می‌دانیم که از نظر کیفیت و ابعاد با نمونه‌های وارداتی قابل رقابت و با بالاترین استانداردهای صنعتی مطابقت دارند.
ProductYou Can Trust
We produce precise cylindrical tubes for the industry. Our products are competitive in terms of quality with imported samples. We also produce different products and types of tubes according to our customer’s needs. Our aim is to meet all the country’s needs in this area.
DOMDrawn Over Mandrel
Afra Zomorrod Asia Company is proud to have domestically produced DOM tubes in the country for the first time, and has the ability to produce any type of tube according to customer requirements.
AutomotiveIndustrial Components
DOM tubes are often used in the automotive industry due to their strength, durability, and resistance to deformation under high stress. Here are a few examples of automotive components that may use DOM tubes:
Steering Box
Shock Absorber
Gas Spring
FullyIntegrated Production
ASIA Tube is most proud of its integrated production control system covering tube manufacturing, drawing, heat treatment, and cutting. Whereas many tube manufacturers outsource the drawing process, this is yet another area where we exhibit our user-focused characteristics and commitment.
IndustrialArticles
Consulting
We also offer consulting services to our customers who need expert advice and guidance on cylindrical tube applications and solutions.
Laboratory
We also offer laboratory services to our customers who need reliable and accurate testing and analysis of cylindrical tubes and other materials.
DrawProcess Steps
This process involves pulling a steel rod or bar through a die at room temperature to produce a tube with a precise diameter and wall thickness. Here are the key steps involved in the cold drawn tube manufacturing process:
Forming
Rollers with various curvatures are used to bend flat steel strip into a tubular shape.
Electric Resistance Welding
A high frequency induced current is used to hot pressure weld the edges of the steel strip formed into a tubular shape.
Eddy current Testing
The integrity of the raw material and weld zone is completely inspected online in a non-destructive means.
Sizing
Rollers with various curvatures are used to squeeze the welded tube, adjusting its outer diameter. Rectangular or square tube can be formed in addition to round tubes.
Cutting
Cutters are used to cut the continuously formed tube into defined lengths.
Heat Treatment
The metallic structure of the high frequency electric resistance welded tube is standardized and softened through heat treatment in a continuous furnace.
Surface Treatment
The surface is roughened through pickling and the tube is put through chemical treatment and dipped in oil.
Swaging
The end of the tube is swaged, reducing the outer diameter so that it can be inserted into the dies for cold drawing.
Cold Drawing
The tube is drawn through plug dies, creating steel tube with excellent dimensional accuracy and smoothness.
Straightening
The straightness of the tube is increased.
