廠傢揭示冷拔無縫鋼管制作流程工藝

按生產方法不同可分為熱軋管、冷軋管、冷拔管、擠壓管等。冷拔無縫鋼管一般在自動軋管機組上生產。實心管坯經檢查並清除表面缺陷，截成所需長度，在管坯穿孔端端面上定心，然後送往加熱爐加熱，在穿孔機上穿孔。在穿孔同時不斷旋轉和前進，在軋輥和頂頭的作用下，管坯內部逐漸形成空腔，稱毛管。再送至自動軋管機上繼續軋制。最後經均整機均整壁厚，經定徑機定徑，達到規格要求。利用連續式軋管機組生產冷拔無縫鋼管是較先進的方法。
According to different production methods, it can be divided into hot-rolled pipe, cold-rolled pipe, cold-drawn pipe, extruded pipe and so on. Cold-drawn seamless steel pipes are generally produced on automatic pipe rolling mills. The solid billet is checked and cleared of surface defects, cut into the required length, centered on the end face of the billet perforation, then sent to the heating furnace for heating, and perforated on the perforator. Under the action of the roll and the top, a cavity is gradually formed inside the billet, which is called capillary. It is then sent to the automatic pipe mill to continue rolling. Finally, the wall thickness of the whole machine is equalized, and the sizing machine is used to calibrate the diameter, which meets the requirements of specifications. It is an advanced method to produce hot-rolled seamless steel pipe by continuous pipe 彩色沥清地坪rolling mill. 2若欲獲得尺寸更小和質量更好的冷拔無縫鋼管，必須采用冷軋、冷拔或者兩者聯合的方法。冷軋通常在二輥式軋機上進行，鋼管在變斷面圓孔槽和不動的錐形頂頭所組成的环形孔型中軋制。冷拔通常在0.5～100T的單鏈式或雙鏈式冷拔機上進行。
If we want to obtain cold-drawn seamless steel tubes with smaller size and better quality, we must adopt cold-rolling, cold-drawing or combination of the two methods. Cold rolling is usually carried out on a two-roll mill. Steel tubes are rolled in an annular pass consisting 印花地坪of a circular groove with variable cross-section and a fixed conical head. Cold drawing is usually carried out on single-chain or double-chain cold-drawing machines of 0.5-100T.
3擠壓法即將加熱好的管坯放在密閉的擠壓圓筒內，穿孔棒與擠壓桿一起運動，使擠壓件從較小的模孔中擠出。此法可生產直徑較小的鋼管。
The extrusion method is to place the heated tube blank in a closed extrusion cylinder, and the perforating rod moves with the extrusion rod to extrude the extruded part from a smaller die hole. This method can produce steel pipes with smaller diameter.