Raw material inspection
Head making (Squeeze head, driving, cutting )
Rust removal and lubrication
Dynamics test (Sampling test of each batch to keep the quality )
Heat treatment (Annealing, normalizing and tempering)
Drawing (Empty drawing or core lining)
Finishing (Straightening and shaping)
Dimensional inspection (Surface appearance, dimensional tolerance)
Head and tail cutting, weighing, packaging, delivery
Scientific standard, professional responsibility, continuous improvement and user satisfaction.
The qualified rate of delivered products is 100%; Zero major quality accidents and over 95% customer satisfaction with products and services.
Focus on customers, give full play to the leadership role of managers, involve all staff, strengthen process quality management control, improve internal and external continuous improvement mechanism, make effective decisions on the basis of data and information analysis, and establish mutually beneficial supplier relations
The main process characteristics of cold-drawn seamless tube are introduced All special-shaped steel tubes (rectangular tubes) are produced by cold-drawing process after rust removal. The specifications can be arbitrary, the shapes can be changeable, and the dimensions are accurate and the surface is beautiful. Most mature products are drawn by tungsten steel die, the same section is very good, and can be pulled thousands of tons of products after the outside diameter data change is very small; Some special-shaped steel tubes are drawn by lining core, which can achieve the shape and precision that cannot be produced by ordinary extrusion and welding process. At present our company produces most of the products, can meet the national standard advanced, some products have reached the international advanced level.
Our factory heat treatment line adopts the most advanced roller hearth continuous furnace in the cold drawing industry, and the temperature difference can be controlled within + / - 7.5c. After cold drawing, the whole steel tube can be tempered, annealed, normalized and tempered. Ensure uniform and stable performance throughout the body, with good comprehensive performance, high fatigue life.