Puyang medium thick wall rectangular tube manufacturer
Under the action of bending moment, during the transition from elastic deformation to plastic deformation of the full section of the cross section at the bending part of the rectangular tube, the outside of the strip steel is pulled, the inside is pressed, and at the same time, it is also affected by the radial pressure. In addition, the rigidity of the roll tool ring angle limits, on the one hand, the neutral layer of the rectangular tube strip steel moves inward, and on the other hand, the thickness of imperial steel is reduced at the bending part. In the process of bending from the outside to the inside to move the neutral layer inward, the circumferential stress is far greater than the radial stress, and the radial strain mainly occurs outside the neutral layer. Therefore, the radial displacement velocity of each layer of fiber outside the rectangular tube is different. At the inner side, due to the small radial strain, the radial displacement velocity of each layer of fiber has little difference, which is almost a constant. Here, the radial displacement velocity inside the neutral layer is treated as a constant.
Puyang medium thick wall rectangular tube manufacturer
1. Performance index analysis of rectangular tube - plasticity: plasticity refers to the ability of metal materials to produce plastic deformation (permanent deformation) without destruction under load. 2. Analysis of performance index of rectangular tube - hardness: hardness is a pointer to weigh the soft and hard level of metal data. At present, the commonly used method for measuring hardness in consumption is the indentation hardness method, which uses an indenter of geometric shape to press into the surface of the metal data to be tested under load, and determines the hardness value according to the indentation level. 3. Performance index analysis of rectangular tube - fatigue: the strength, plasticity and hardness discussed above are all mechanical performance indicators of metal under static load.
Puyang medium thick wall rectangular tube manufacturer
1. Pay attention when customers choose square tubes! Choose the right square tube for your request. 2. Some anti-corrosion measures shall be taken for pipes during operation. 3. Do not overload when using. For example, only by weighing can you be overweight. 4. Do not weld or pull bridge wires on the pipe at will, which may cause damage and defects to the pipe. 5. It is important to pay attention to whether the pipes are intact and whether the quality meets the national standards when choosing to purchase. Can we disagree with your request.
Puyang medium thick wall rectangular tube manufacturer
The quality of seamless square tube is better and the price is more expensive. The welded square tube is welded by bending the plate. There is high temperature in the welding process, which will affect the metal structure, and its mechanical properties are not as stable as seamless steel tubes. Welded square tube is a hollow square section steel square tube, also known as hollow cold-formed steel. It is a square section steel with overall dimensions made of hot rolled or cold-rolled strip steel or coil steel by high-frequency welding after cold bending and forming. In addition to the thickening of the wall thickness, the size of the corner and the straightness of the edge of the seamless square tube have reached the extent that they exceed the resistance welded cold formed square tube. The size of the R corner is generally between 2 and 3 times of the wall thickness. It can also consume R corner square tubes of the size required by customers according to their needs. Seamless square tube is a kind of long steel with hollow section and no seams around. It is a square tube formed by extrusion of seamless tube through four sides of the mold. The square tube has a hollow section and is widely used as a pipeline to escort fluid. It is mainly used in liquid escort, hydraulic support, mechanical structure, medium and low pressure and high pressure boiler tubes, heat exchange tubes, gas, oil and other industries. It is more stable than welding and will not show cracks.
Puyang medium thick wall rectangular tube manufacturer
Seamless square tubes pass through the tube blank sawing section of the steel mill, and then are heated - perforated - sized - straightened - cooled - slugged - packaged in the annular furnace to become qualified waste products. Generally, it is impossible to place so many stock items in the consumer workshop when they are sent to the user, which requires dealers to place some stock items. However, dealers generally do not have large indoor warehouses, and some costs are too high, which is not cost-effective. Most of them are outdoor warehouses. If the seamless square tubes are placed outdoors, they will be exposed to the wind and the sun. The so-called floating rust literally means a layer of rust floating on the seamless square tube, which can be removed with a towel or other things. Simply speaking, floating rust is also considered as no rust, which belongs to the normal state. The rusting of seamless square tubes is a long-term problem. At least for more than one year, the seamless square tubes that have been exposed to the wind and the sun outside have large and small pits on them, which is the only difference between the floating rust and rusting of seamless square tubes.
