It is the process of drawing the die hole of the rolled metal blank (shape, pipe,ChilpansingoHow much is galvanized pipe, product, etc.) into a section to reduce the length and increase. It is mostly used for cold processing.The difference between square pipe and seamless steel pipe the main feature of seamless steel pipe is no welding joint and can withstand large pressure. The product can be very rough as cast or cold drawn parts.Chilpansingo,Low alloy steel is divided into q Mn, Q, St-, etc.Stage ( & mdash; )Sektevkar, special shaped square pipe is the general name of square pipes with other cross-section shapes except circular pipe. According to the different cross-section shape and size of steel pipe, it can be divided into special-shaped square pipe with equal wall thickness (code D), special-shaped square pipe with unequal wall thickness (code BD) and special-shaped seamless steel pipe with variable diameter (code D) These special-shaped large-diameter qb square tubes are widely used in various structural parts, tools and mechanical parts. Compared with circular tubes, special-shaped tubes generally have large moment of inertia and section modulus, and have large bending and torsion resistance, which can greatly reduce the structural weight and save steel. Square tubes are an indispensable part of construction workCold drawn or cold rolled precision square tube (gb-) is a cold drawn or cold rolled precision square tube with high dimensional accuracy and good surface finish for mechanical structure and hydraulic equipment. The selection of precision square mechanical structure or hydraulic equipment can greatly save machining hours improve material rate and improve product quality.The appearance of fake and inferior square tubes often has pitting. Pockmarked surface is an irregular uneven defect on the surface of square lead pipe due to serious wear of rolling groove. Due to the pursuit of profit by fake and shoddy square tube manufacturers, the rolling of rolling groove often exceeds the standard.

Square tube plays an important role in the rapid economic development. The functions of square tube are different, and its characteristics are also different. Square tube has strict standards. There are many welding processes and advantages of square tube. Let me show you the welding process and advantages of lower tube.One of the steps that are prone to defects in the production of square tubes is heat treatment and the other is tensile treatment. Today we need to know the latter. Maybe some people will have a lot of questions about why square tubes are prone to defects in tensile. Now let's analyze the specific causes of defects.The advantage of empty bending is that it can bend the side length when the real bending cannot be carried out, such as synchronous bending and finishing of the upper side and side of qb square tube. Empty bend can also bend R & amp; amp; lt; .T without fracture of pipe wall.retailer,For transportation: water supply, drainage, sewage treatment engineering,ChilpansingoHot dip galvanized steel grating plate, mud transportation, the quality of square tubes is getting better and better. The quality of square tubes will affect our lives. Because the functions of square tubes are different,ChilpansingoGalvanized round pipe railing, their characteristics and uses are different. I will introduce the characteristics and uses of square tubes in detail.Stage ( & mdash; )

The floating mandrel mill is in its heydayresources,Change to square pipe: generally, the strip steel is unpacked leveled, crimped and welded to form a round pipe, and then cut into the required length. Stage ( & mdash; )Mechanical polishing: after processing, the parts have good levelness, dull and rusty. Suitable for processing simple parts, medium and small products.Fatigue strength, plasticity and hardness discussed above are indicators of the mechanical properties of metals under static load. In fact, many machine parts work under cyclic load, under which fatigue will occur.Chilpansingo,Generally, chemical and electrolytic methods are usedThere are many ways of ignition, such as arc, electric spark, flame, strong current, high-temperature furnace, electron beam, laser, high-temperature radiation microwave, chemical furnace, etc.Precision inner diameter square tubes for hydraulic and pneumatic cylinders (gb-) are cold drawn or cold-rolled precision square tubes with precision inner diameter for hydraulic and pneumatic cylinders.