News

Light steel villa, also known as light steel structure house, its main material is light steel keel synthesized from hot-dip galvanized aluminum steel strip by cold rolling technology. 1. Corrosion resistance: The corrosion resistance of "55% aluminum-zinc-plated steel coil" comes from the barrier protection function of aluminum and the sacrificial protection function of zinc. When zinc is used for sacrificial protection on the cut edges, scratches, and scratches of the coating, aluminum forms an insoluble oxide layer and exerts a barrier protection function. The aluminum-zinc alloy steel coil has been subjected to outdoor exposure tests for more than 20 years in various atmospheric environments, and it is proved that the cutting edge protection function of 55% aluminum-zinc steel plate is better than that of galvanized steel plate and 5% aluminum-zinc steel plate. good. 2. Heat resistance: The heat resistance of 55% aluminum-zinc alloy steel plate is better than that of galvanized steel plate, which is similar to the high temperature oxidation resistance of aluminum-plated steel plate. Aluminum-zinc alloy steel plate can be used in high temperature environment up to 315 degrees. 3. Reflectivity: The 55% aluminum-zinc alloy steel plate has a high reflectivity, making it a heat-resistant barrier; the thermal reflectivity of the aluminum-zinc steel plate is almost twice that of the galvanized steel plate, so it can act as a roof and inlay without painting. The board can also achieve energy-saving effects. 4. Paintability: Due to the excellent adhesion between the zinc layer of the galvanized steel sheet and the paint, it can be painted without pretreatment and weathering when used as a sign board for general purposes; while the galvanized steel sheet needs weathering and pretreatment .

Roll forming is developed from spin forming. It is to change the type knife into a rolling head. The rolling head and the model each rotate around a fixed axis, and the plastic mud placed in the model is stretched and pressed into a green body. The shape and size of the green body completely depend on the "cavity" formed by the rolling head and the die surface. The rolling method can be divided into male mold rolling and female mold rolling. Compared with spin forming, roll forming has the advantages of high density of the blank, large mechanical strength, small deformation, low labor intensity, and easy mechanization and automated production.

The main working parts and tools on the rolling mill that cause continuous plastic deformation of metal. The roll is mainly composed of three parts: roll body, roll neck and shaft head. The roll body is the middle part of the roll that actually participates in rolling metal. It has a smooth cylindrical or grooved surface. The roll neck is installed in the bearing, and the rolling force is transmitted to the stand through the bearing seat and the pressing device. The shaft head of the transmission end is connected with the gear seat through the connecting shaft, and transmits the rotating torque of the motor to the roller. The rolls can be arranged in the form of two rolls, three rolls, four rolls or multiple rolls in the rolling mill stand.

Because of its rich colors, small size, durability, and energy saving, LEDs are very suitable for decorative purposes. Install it on a circuit board or flexible cable or other materials. LED can be used as a light source for letter lights, sign boards, track lights, tubes, etc. In 1962, the first practical visible light LED appeared. The development of LED has reached a high level. LED has been widely used as the ideal substitute for light bulbs, neon lights and light tubes. And people expect that with its further development, LED will completely replace the above-mentioned light source. The future of mankind will be brighter. Because the use of LED can save a lot of energy, money and time. The development of LEDs can be divided into three stages: the emergence of red LEDs, the emergence of blue LEDs, and the emergence of white LEDs. Red and green LEDs have been developed for decades, but they are all monochromatic LEDs. If it is used as a light source, the illuminated object will be covered with a color, rather than the color of the object itself, so the application of LED has certain restrictions. The ultimate goal of LED development is white LED with high brightness, which can completely replace traditional light sources. This is a long and arduous road, until the Japanese scientist Shuji Nakamura made a blue LED with a compound in 1993. This breakthrough played a decisive role in the history of LED development. Based on the role of this blue LED, white light LED It was invented soon in 1997. Since then, LED products have been widely used in various fields and are considered as the future lighting source.

Electric shovel is also called rope shovel and cable shovel, that is, mechanical electric excavator is a single bucket excavator that uses transmission parts such as gears, chains, and cable pulleys to transmit power. Its production has a history of 100 years. Electric shovel is one of the main mining equipment for 10 million-ton open-pit mines. It has high productivity, high operation rate and low operating cost. It is a recognized model in the mining industry. The electric shovel consists of a walking device, a slewing device, a working device, a lubrication system, and an air supply system. The bucket is the main part of the electric shovel. It directly bears the force of the ore being excavated, so it wears a lot. The stick is also one of the main parts in the excavation process of the electric shovel. Its function is to connect and support the bucket, and The pushing action is transmitted to the bucket, and the bucket completes the action of digging the soil under the combined action of pushing and lifting forces.

It is lifted by the lifting system and moved horizontally by the carrier (some types of vertical lifting parking equipment do not have a carrier, but through the movement of the car board) to realize the horizontal movement, and park the car on the parking equipment on both sides of the hoistway. It is composed of metal structure frame, lifting system, carrier, slewing device, entrance and exit accessory equipment, control system, safety and detection system.

The spiral steel pipe machine is used to manufacture spiral seam welded pipes, which can produce steel pipes of different diameters with the same width of strip steel, and produce steel pipes of the same diameter with different widths of strip steel. Spiral welded pipe machines (spiral steel pipe machines) are mainly front swing type and back swing type. Spiral welded pipes are mainly used in petroleum, chemical and transportation industries. Its product feature is that the diameter-to-wall ratio is as high as 775, and its roundness is extremely poor. When there is no side support, it loses stability and becomes an elliptical shape, which brings great difficulties to forming, welding, cutting and transportation. This machine consists of a single machine such as uncoiling, feeding, straightening, shearing, receiving, trimming, delivery, input guide, forming, steel pipe internal and external welding, pipe cutting and output, and pipe turning.

It can destroy the casting structure of the steel ingot, refine the grain of the steel, and eliminate the defects of the microstructure, so that the steel structure is dense and the mechanical properties are improved. This improvement is mainly reflected in the rolling direction, so that the steel is no longer isotropic to a certain extent; bubbles, cracks and looseness formed during casting can also be welded under high temperature and pressure.

Hot-rolled steel coil is used as raw material, after pickling to remove oxide scale, cold rolling is carried out. The finished product is hard-rolled coil. The cold-work hardening caused by continuous cold deformation increases the strength, hardness and toughness of the hard-rolled coil. The plastic index drops, so the stamping performance will deteriorate, and it can only be used for simple deformed parts. Hard-rolled coils can be used as raw materials for hot-dip galvanizing plants, because hot-dip galvanizing units are equipped with annealing lines. The weight of the rolled hard coil is generally 20-40 tons, and the steel coil is continuously rolled on the hot-rolled pickled coil at room temperature. The inner diameter is 610mm.

According to the motion of the rolling piece, the rolling methods are divided into: longitudinal rolling, cross rolling, and cross rolling. The longitudinal rolling process is a process in which metal passes between two rolls that rotate in opposite directions and produces plastic deformation between them. Cross rolling: The direction of movement of the rolled piece after deformation is consistent with the direction of the roll axis. Skew rolling: The rolling piece moves in a spiral, and the rolling piece and the roll axis have no special angle. According to the metal state, there are: hot rolled cold rolled.

The rolling piece is drawn between the rotating rolls by friction and undergoes plastic deformation under compression. Through rolling, the metal has a certain size, shape and performance.

Rolling: A pressure processing method in which a metal blank is passed through a pair of rotating rolls (various shapes). Due to the compression of the rolls, the cross-section of the material is reduced and the length is increased. This is the most commonly used production method for producing steel. Production of profiles, plates and pipes. There are two types of hot rolling and cold rolling.