A rebar bending machine, which can also be seen as one of the Steel Processing Machines that deforms the rebar. Its main function is to process steel bars of 20mm diameter and above, bending them. The machine has a small footprint and is relatively cheap, not exceeding 10,000 RMB. It can bring a lot of convenience to steel bending.
There are various types of manual, electric and hydraulic. Cutting the diameter of the rebar are more than 20mm, the maximum cutting diameter of 40mm. Cutting machine is the use of movable blade relative to the fixed blade for reciprocating movement and cut off the steel bar.
Due to technical constraints in the 80s and 90s, the steel processing technology, but also stay in, straightening machine can only straighten the steel, cut off the need for manual sizing and cutting. With the advancement of technology, the emergence of rebar straightening and cutting in one rebar straightening machine. This greatly saves the time spent on rebar processing.
Nowadays, most of the rebar straightening machines that people refer to are this kind of rebar straightening machines. In addition to the above common processing equipment, there are also machines for removing rust, cold drawing, cold pulling and other raw material processing, and spot welding, butt welding and other forming processing.
the Steel Processing Machines is used to remove rust and scale from reinforcing bars in order to ensure good welding quality and good adhesion of the bars to the concrete.
Both electric wire wheel brushes are used to remove the rust and scale and to remove the rust from the reinforcing steel by passing it through a sand box, using the friction between the sand and the reinforcing steel to remove the rust. The descaling of reinforcing bars is often done in the process of cold drawing, cold pulling and straightening and cutting.
Using the stress above the yield point, the steel bar is stretched within certain limits, thus increasing the yield point of the bar by 20 to 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 rebar through a pulley set. The cold drawing speed is around 5 m/min and can pull coarse and fine reinforcement, but covers a large area. Resistance cold drawing machines are used for the stretching of coiled bars up to 8 mm in diameter.
This machine can be combined with a straightening and cutting machine to produce a fixed length of cold drawn steel bar directly.
This machine is used to draw 6 to 10 mm diameter Grade 1 reinforcing bars through a carbide or tungsten carbide wire drawing die with a diameter of less than 0.5 to 1 mm.
During cold drawing, the reinforcement is subjected to plastic deformation by tension and extrusion at the same time, and the cross-sectional area of the drawn reinforcement is reduced, resulting in cold work strengthening and an increase in tensile strength of 40-90%.
A machine that upsets the ends of reinforcement bars as anchor heads for prestressing bars or cold drawing bars. Heading machines are available in mechanical and hydraulic versions.
The hydraulic header works on the following principle: when the hydraulic cylinder pushes the clamp to clamp the rebar, the header die moves forward to squeeze the head of the rebar and then the spring pushes the die back and relaxes the clamp, i.e. a header is completed.
In addition to the usual arc welding machines and spot welding machines, butt welding machines and multi-head spot welding machines are commonly used to butt the reinforcing bars and make the reinforcing mesh, which are characterised by high efficiency and low electricity consumption.
The working principle of contact butt welding is to clamp the reinforcement bars into two electrodes separately and to make contact with the ends of the bars when the power is switched on.
A strong short-circuit current is blocked at the contact, generating a high temperature that melts the metal and applies even more squeezing pressure to weld it together. As the metal melts and splashes in all directions, a flash is formed, so it is called flash welding.
The multi-head spot welder is generally capable of completing multiple processing procedures such as straightening, mesh hauling and cutting, and can automate the production of shaped mesh.
Reinforcing steel is used as the skeleton of concrete, and has become a widely used and abundant main material in building structures. Before the concrete is poured, the reinforcement must be made into a skeleton of a certain size and form to be incorporated into the formwork.
To make the skeleton, the reinforcement bars need to be strengthened, stretched, straightened, cut, bent and connected before they can be bundled and shaped.
As the amount of reinforcing steel is extremely large, it is difficult to complete manually and requires a variety of special machinery for processing, which is called reinforcing steel processing machinery, or reinforcing steel machinery for short.
Rebar processing machinery is the processing of coiled bars and straight bars into the length size, bending shape or installation components required for the installation of steel projects, mainly including strengthening, straightening, hoop bending, cutting, bending, component forming and rebar renewal equipment, rebar components such as rebar cages, rebar trusses (such as triangular beams, wall panels, columns, beams, etc.), rebar nets, etc.
There is a wide range of rebar processing machinery, which can be divided into four categories according to their processing techniques, such as strengthening, forming, welding and prestressing.
1, reinforcing machinery: mainly including cold drawing machine, cold drawing machine, cold rolling twisting machine, cold rolling ribbed steel forming machine, etc.. The processing principle is that by applying a force to the steel bar beyond its yield point, the steel bar will produce different forms of deformation, thus increasing the strength and hardness of the steel bar and reducing plastic deformation.
2, rebar forming machinery: rebar straightening and cutting machine, rebar cutting machine, rebar bending machine, rebar mesh forming machine, etc.. Their role is to put the raw material reinforcement, installation of a variety of concrete structures required for the requirements of the steel skeleton processing and forming.
3, rebar welding machinery: the main rebar welding machine, rebar spot welding machine, rebar mesh forming machine, rebar electroslag pressure welding machine, etc., used in the welding of rebar forming.
4, steel prestressing machinery: mainly electric oil pumps and jacks and other components of the tensioning machine and header machine, used for steel prestressing tensioning operations.