[Steel Bar Processing Machinery] What are the steel bar processing machinery? Introduction to steel bar processing machinery and equipment
What are the steel bar processing machines?
Steel bar bending machine
Rebar bending machine can also be regarded as one of the machines that deforms steel bars. Its main function is to process steel bars with a diameter of more than 20mm and bend them. The machine occupies a small area and the price is relatively cheap, not exceeding 10,000 yuan. It can bring great convenience to bending steel bars.
Steel barCutting machine
There are many types such as manual, electric and hydraulic. The diameter of the cut steel bars exceeds 20mm, and the maximum cutting diameter is 40mm. Cutting machines all use movable blades to reciprocate relative to fixed blades to cut steel bars.
Straightening, straightening and cutting machine
Due to technical limitations, the steel bar processing technology in the 1980s and 1990s still remained at the level of straightening. The machine can only straighten steel bars, and cutting requires manual lengthening and cutting. With the advancement of technology, steel bar straightening machines have emerged that can straighten and cut steel bars in one unit. This greatly saves the time spent on steel bar processing. Most of the steel bar straightening machines that people refer to nowadays refer to this kind of steel bar straightening machines.
In addition to the above common processing equipment, is also used for steel bar rust removal, cold drawing, cold drawing and other raw material processing, and spot welding, butt welding and other forming Processing machinery.
Rust remover
It is used to remove rust from steel bars to ensure the quality of steel bar welding and good adhesion between steel bars and concrete. There are two methods: using an electric wire wheel brush to remove rust and scale, passing the steel bars through a sand box to remove rust, and using the friction between sand and steel bars to remove rust. The rust removal of steel bars is often completed in the process of cold drawing, cold drawing, straightening and cutting.
Cold drawing machine
Use the stress exceeding the yield point to stretch the steel bar within a certain limit, thereby increasing the yield point of the steel bar20 ~25%. Cold drawing machines are divided into winch cold drawing machines and resistance cold drawing machines. The winch cold drawing machine uses a winch to stretch the steel bars through the pulley block. The cold drawing speed is about 5 meters/ minutes, which can draw thick and thin steel bars, but it occupies a larger area. big. The resistance cold drawing machine is used to draw wire rod steel bars with a diameter of 8mm or less. The steel bars are strongly pulled by the drum and stretched through 4～6 resistance wheels. This machine can be used with The steel bar straightening and cutting machine combination can directly process cold-drawn steel bars of fixed length. The cold-drawing speed is 40 meters/Divided into left and right parts,high efficiency and compact layout.
Cold drawing machine
Making the diameter 6～10 mm 1 grade steel bars are forced to pass with a diameter less than 0.5～ 1mm carbide or tungsten carbide wire drawing die for cold drawing. During cold drawing, the steel bar is subjected to tension and extrusion at the same time and undergoes plastic deformation. The cross-sectional area of the drawn steel bar is reduced, resulting in cold work strengthening, and the tensile strength can be increased by 4040~90%.
Reinforcement bar heading machine
A machine that roughens the ends of steel bars and uses them as anchor heads for prestressed steel bars or steel bars during cold drawing. . There are two types of heading machines: mechanical and hydraulic. The working principle of the hydraulic heading machine is: when the hydraulic cylinder pushes the clamp to clamp the steel bar, the heading die moves forward, squeezing the head of the steel bar for upsetting, and then the spring pushes the die back and relaxes the clamp, that is, one complete Header.
Rebar welding machine
In addition to general arc welding machines and spot welding machines,Butt welding machines and multi-head spot welding machines are commonly used to butt steel bars and make steel mesh. They are characterized by high efficiency and low power consumption. The working principle of contact butt welding is to clamp the steel bars into two electrodes respectively, and after the power is turned on, the ends of the steel bars are in contact. The strong short-circuit current is blocked at the contact point, generating high temperature, melting the metal, and exerting extrusion force to weld it together. Because the metal splashes around when it melts, forming a flash, it is called flash welding. Multi-head spot welding machines can generally complete multiple processing procedures such as steel bar straightening, mesh pulling and cutting, and can implement automated production of shaped mesh.
Introduction to steel processing machinery and equipment
Reinforcement as concrete The skeleton constitutes reinforced concrete, which has become a widely used and large-scale main material in building structures. Before pouring concrete, the steel bars must be made into a skeleton of a certain size and form and incorporated into the formwork. To make a steel frame, the steel bars need to be strengthened, stretched, straightened, cut, bent, connected, etc., and finally bundled into shape. Due to the large amount of steel bars, manual operations are difficult to complete, and various special machines need to be used for processing. This type of machinery is called steel bar processing machinery, or steel bar machinery for short.
Reinforcement bar processing machinery processes wire rod steel bars and straight steel bars into lengths, curved shapes or installation components required for installation and construction of steel bar projects. It mainly includes strengthening, straightening, hoop bending, cutting and bending. , component forming and steel bar splicing equipment, steel bar components include steel cages, steel trusses (such as triangular beams, wall panels, columns, girders, etc.), steel mesh, etc.
There are many types of steel bar processing machinery. According to their processing technology, they can be divided into four categories: strengthening, forming, welding and prestressing:
1, steel bar strengthening machinery: mainly include Steel bar cold drawing machine, steel bar cold drawing machine, steel bar cold rolling twisting machine, cold rolled ribbed steel bar forming machine, etc. The processing principle is to apply a force that exceeds the yield point of the steel bar to cause the steel bar to deform in different forms, thereby increasing the strength and hardness of the steel bar and reducing plastic deformation.
2, Steel bar forming machinery: steel bar straightening and cutting machine, steel bar cutting machine, steel bar bending machine, steel bar mesh forming machine, etc. Their function is to process and shape raw steel bars to meet the requirements for installing the steel frame required for various concrete structures.
3. Reinforcement bar welding machinery: mainly include steel bar welding machines, steel bar spot welding machines, steel bar mesh forming machines, steel bar electroslag pressure welding machines, etc., used in steel bar forming of welding.
4. Steel bar prestressing machinery: It mainly includes stretching machines and heading machines composed of electric oil pumps and jacks, which are used for steel bar prestressing tensioning operations.
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