Seamless steel pipes are relatively well-known. Seamless steel pipes are strip-shaped stainless steel plates with hollow cross-sections and no joints nearby. Seamless steel pipes are widely used in the production of spare parts and mechanical parts. The key technologies for forming seamless steel pipes are cold extrusion, hot stamping, hot hole-breaking and cold rolling, and hot push expansion. Let's take a look at the forming technology of seamless steel pipes and look forward to helping you.
1. Cold extrusion method: Before extrusion molding, the blank must be prepared by mechanical processing. When extruding pipes with a diameter of less than 100 mm, the capital investment of machinery and equipment is small, the consumption of raw materials is low, and the technology is relatively complete.
2. Hot stamping method: The seamless steel pipe is to fix the tablet blank or the pre-formed blank on the rotating mandrel, and use the rotary wheel to press the blank, and the rotary wheel is fed with the shaft diameter. One or several times of production and processing to obtain a variety of processing methods for thick-walled hollow rotating body products.
3. Hot hole breaking cold rolling method: Hot hole breaking cold rolling is dominated by longitudinal rolling widening and cross rolling widening. The key comparison of longitudinal rolling and widening cold rolling is limited moving mandrel continuous rolling tube cold rolling, less sound card rack limit moving mandrel continuous rolling tube cold rolling, three-roll limit moving mandrel continuous rolling tube cold rolling and fluctuating mandrel continuous tube rolling Cold rolled.
4. Hot push expansion method: the push expansion machine is simple and equipment, the project cost is cheap, the maintenance is convenient, the economic development is durable, and the product specifications and models can be changed easily. Just spare parts. It is suitable for the production of medium and thick-walled and large-diameter seamless steel pipes, and can also produce thick-walled pipes and tubes that do not exceed the working capacity of machinery and equipment.
