Tianjin Hedong alloy steel pipe wall thickness national standard focus industry precision rolled pipe is also called cold rolled precision steel pipe, which is a good process for seamless steel pipe. Features of precision rolled tube: Cold rolled precision steel tube has high tolerance dimensional accuracy, product accuracy within ± 5mm, good internal and external wall smoothness, and no oxide layer on the surface. Application process Tianjin Hedong Service is the first part of the basic theory of Tianshui. What are the three stages of the perforation process? High-quality recommended high-pressure seamless steel pipe for fertilizer equipment (GB 79-2000) is suitable for working temperature of -40 ~ 400 ℃, High-quality carbon structural steel and alloy steel seamless steel tubes for chemical equipment and pipelines with a working pressure of 10 ~ 30Ma. Tianjin Hedong alloy steel pipe wall thickness national standard focus galvanized steel pipe: In order to improve the corrosion resistance of steel pipes, ordinary steel pipes (black pipes) are galvanized. Galvanized steel pipe is divided into two types: hot-dip galvanized and electric steel zinc. These two types of punching machines are the main units widely used today. The tapered roller punching machine is shorter and has more advantages. The comparison is as follows: The rolls of the barrel roll perforator and the cone roll perforator can be arranged up and down and left and right; the rolls of the barrel roll perforator are composed of two cones, and the rolls of the cone roll perforator are composed of one cone; The barrel speed of barrel roller perforating machine changes from small to large-small. The speed of rolling of tapered roller perforating machine increases gradually from small to large as the diameter of the roll increases. It is smaller, which is more conducive to the axial extension deformation of the metal, the additional deformation is small, the quality of the inner surface of the capillary tube is good, and the wall thickness accuracy is higher than that of the barrel roller perforator; Suitable for perforated thin-walled capillary tube, Tianjin Hedong alloy steel pipe national standard thickness, which can reduce the number of stands of the tube rolling unit; d / s ratio is not more than 2 and it is better not to exceed 20 in use. Technological innovation
Tianjin Hedong alloy steel pipe wall thickness national standard focus copper tube: weight per meter = 0.02796 * wall thickness * (outer diameter-wall thickness) b: steel pipe joints shall comply with YB 238 regulations; malleable cast iron pipe joints shall comply with YB 230 Regulations. Tianjin Hedong is a 16Mn density 16Mn steel plate density 16Mn density 8 16Mn steel plate density 85 precision tube is a high precision, high brightness seamless steel pipe with good cold drawing or cold rolling process. Its inner and outer diameter can be accurate to less than 0.2 mm, while ensuring the same bending and torsional strength, and light weight, it is widely used in precision mechanical parts and engineering structures. It is also commonly used in various routines, pipes, and bearings. In order to push the tube blank between the rolls, a pusher is installed at the front of the perforator. Older pushers are pneumatic, in addition to chain pushers and hydraulic pushers. The front end of the pusher is equipped with a turnable pusher head. The speed of a modern pusher can be set to advance at a high speed before approaching the roll to save time, and to reduce the speed when approaching the roll to adapt to the bite of the tube blank. The premise of the design of the quotation table is that the following parameters are known:-tube diameter: DB-capillary diameter: DH-capillary wall thickness: SH-roll feed angle: γ is calculated as follows: determine the perforation section: the calculation formula is: Length of the perforated segment LR: Arc radius of the perforated segment: The function of the LGT2 segment is to determine the uniform wall thickness. Its length guarantees at least 5 capillary pitches and adds a safety factor. The calculation formula is as follows: The formula for determining the end diameter, that is, the diameter of the head, is: In the formula: SF—coefficient, 2 ～ 5CH—the clearance between the inner diameter of the capillary tube and the head. Tianjin Hedong alloy steel pipe wall thickness national standard focus industry precision tube is used for mechanical structure, hydraulic equipment, dimensional man-hours, improve material rate, and at the same time help to improve product quality. The seamless tube is rolled in a ring-shaped pattern composed of a circular hole groove with a variable cross-section and a fixed conical head. The volume calculation formula of Tianjin Hedong alloy steel pipe is usually drawn on a single-chain or double-chain cold-drawing machine. The method is to move a heated pipe blank into a perforated rod and a rod in a closed cylinder to move the part from a smaller die hole. This method can be used for small diameter steel pipes. Installation of Quality Department
Tianjin Hedong alloy steel tube wall thickness national standard focusing industry precision tube is a seamless tube for mechanical structures, hydraulic equipment with high dimensional accuracy and good surface finish. The use of precision seamless manufacturing mechanical structures or hydraulic equipment can greatly save machining hours and improve material rates. The Tianjin Hedong alloy steel pipe specification table is also conducive to improving product quality. Seamless tubes can be divided into hot-rolled tubes, cold-rolled tubes, cold-drawn tubes, tubes, etc. Hot-rolled seamless tubes are good on automatic tube-rolling units, and solid tube blanks are cut and removed to remove surface defects. The length is centered on the end face of the perforated end of the tube blank and then sent to the heating furnace to be heated on the piercing machine. The perforation is continuously rotated and advanced while the perforation is in progress. Under the action of the roller and the head, a hollow scale is gradually formed inside the tube blank and sent to the automatic After continuous rolling on the pipe rolling mill, the thickness of the whole wall is uniformized by the sizing mill, and the size is determined by the sizing machine to meet the specifications. The continuous hot rolling seamless steel pipe is more advanced. If you want to obtain smaller size and quality, For better seamless tubes, cold rolling and cold drawing or the combined cold rolling of the two are usually carried out on a roll mill. The seamless tube has a circular hole formed by a variable cross-section circular hole groove and a fixed conical head. Medium rolling and cold drawing are usually performed on a single-chain or double-chain cold-drawing machine. The method is to move the heated pipe blank into a closed cylinder and move the perforated rods and rods to squeeze the parts from the smaller die holes. It turns out that this method works well for smaller diameter steel pipes. Welcome to call and consume the amount of reduction at the rolling strip. It represents the change in the diameter of the billet at the rolling strip. The value ranges from 9 to 12%. The perforated thin-walled pipe takes the large value and the thick-walled pipe takes the small value. Common materials Common materials are 10 #, 20 #, 35 #, 45 #, 20cr, 40Cr, 20CrMo, 16mn, 27simn, 304, 201, 310s, high-quality carbon structural steel. For mechanical structures, hydraulic equipment, automotive parts, steel casing. Preferential precision rolled pipe is also called cold rolled precision steel pipe, which is a good process for seamless steel pipe. Features of precision rolled tube: Cold rolled precision steel tube has high tolerance dimensional accuracy, product accuracy within ± 5mm, good internal and external wall smoothness, and no oxide layer on the surface. As an important part of iron and steel products, alloy pipes are divided into seamless steel pipes (round billets) and welded steel pipes (slabs, strips) due to their different processes and the shape of the pipe blanks used.