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Both automated and manual machines conduct bend and re-bend tests, although automated machines are controlled by computers to execute their work, requiring less human labor and decreasing the chance of an error.
Mechanical bend rebend testing machine
This machine primarily uses mechanical parts and has a system of levers, weights, and springs. The major advantages of these machines are their cost and ease of usage. Although they may not be as precise or quick as some of the more advanced machines available today, they are still solid and dependable, especially for businesses on a budget or those just starting out.
Electronic bend rebend testing machine
These machines employ sensors and an electronic control unit to execute bending and rebending. The test results are then sent to a computer for analysis. These devices are convenient and highly effective, characterized by their high precision and automatic capacity. They are also capable of performing several tasks and functioning for long periods without the need for manual assistance. These are especially useful for large industries requiring repeated tests and quick results.
Hydraulic bend rebend testing machine
The hydraulic machines use the pressure of fluid within pipes to achieve the bending process. These machines may be large and powerful and are often employed when the re-bending of large sections is necessary. They are also flexible since the pressure can easily be altered to either increase or decrease bends, depending on the situation. Despite the machines' efficiency, they must be maintained frequently, which can be quite a mess as its fluid system can be dirty and slimy.
Manual bend rebend testing machine
A manual machine is labor-intensive and requires a hands-on approach to operate. These machines use musclepower to complete bending and rebending tests. While they are not as efficient or high-capacity as other machines, one advantage of manual machines is their low initial cost compared to fully automated systems. These machines are most effective when used for small-scale operations or in areas where electricity is not available.
The bend rebend testing machines are primarily used in metal and construction industries, and knowing how and why metal behaves under stress is key to building strong and robust structures.
Steel fabrication industry
The machines help the users understand how steel will be manipulated during its end-use. If the steel can maintain its shape even when bent, it will be used in constructing buildings, cars, bridges, and other products. Any faulty bending of the material indicates weakness, so only pass materials that have undergone proper testing.
Construction industry
Steel undergoes a bending test before it is widely incorporated into building structures. Concrete and other materials are also tested using this equipment. This is because they help check the restored shapes and dimensions, thus ensuring that the used materials will be safe and sound for the structure.
Aerospace industry
Rebending and bending tests are done on metals used in airplane parts to make sure they can withstand high-stress conditions. The test indicates that materials will not lose their shape when subjected to extreme conditions including temperature variations and pressure.
Automotive industry
Testing machines are used to test metals used in making car bodies and some internal components. The results from the tests ensure that the materials used will be strong enough to hold up against road conditions and mechanical works without losing their original structure.
Shipbuilding industry
Just like in the automotive industry, metals and other materials used in constructing ships must undergo bending and rebending tests to determine their strength. Owing to the aquatic nature of ships, the materials used must be strong and resistant to corrosion and bending, hence, these machines are pivotal in the marine industry as well.
The primary function of any bending or rebending testing machine is to assess the ductility of materials, especially metals, by bending and then observing what happens when they are rebent. This way, one gets to know some materials and how good they are. Here are the various functions of this machine:
Most bending and rebending testing machines tend to be automated; thus, they feature advanced elements to make the bending and rebending tests rapid and accurate. Select features of electronic machines include:
The normal design of a bend rebend apparatus consists of two major components: the bending apparatus, which does the bending, and the rebending apparatus, which does the rebending. The design used in hydraulic machines is much different, as hydraulic pressure is involved in the process.
This machine is designed with safety in mind as well. This is due to the fact that bending materials, especially metals, can be very dangerous if not handled with care. Safety features that ensure the safety of users include protective covers over moving parts and emergency stop buttons.
A purchasing decision of a machine for bending and rebending tests should be based on the needs analysis of the organization. Some of the factors that should be taken into account to guide making the right choice are as follows:
Testing capacity
The organization should determine what materials and thicknesses it will be working with. Machines can do only a maximum bending of angle and force, and they can bend only materials within that angle and force. The testing apparatus that can handle these thickness and bending angle concerning the material types (ductile metals and alloys) challened by employer) should be chosen.
Operational style
There are manual, mechanical, and hydraulic machines. A company offering high output should go for an automated or hydraulic machine. If it is a small company or startup, perhaps a manual or mechanical machine is intensive for initial investment, which is very required at this stage in the business, especially if the testing is not done on a large scale for many different materials.
Precision and accuracy
Choose a machine with a relatively higher level of precise measurements. Digital machines are preferred to analog ones in precision. Apart from that, companies should ascertain the precision level of the machine as compared to the industry standard by checking the specifications and figures provided by the manufacturer.
Budget
Mechanical bend rebend testing machines are much cheaper than hydraulic and automated machines. However, the initial cost of a business should not be considered as the only cost. A business should also consider maintenance and operational costs in the long run.
After-sales service
Bend rebend machines undergo wear and tear like other machines, therefore, it becomes pertinent to check what kind of service is offered for these machines. Warranty length, availability, and promptness of spare parts, and the availability of customer care services are very important in making the right choice.
It's the point where the material can no longer return to its original shape. Once this limit is surpassed, permanent deformation occurs, meaning the material has been altered and cannot revert to its initial form.
The testing should be frequently done on materials that are newly sourced. For existing materials that have constantly been used, tests should not be neglected, especially if changes in the material or manufacturing processes are observed. Besides, routine testing should be done to ensure materials stay up to standards.
The pressure is transmitted to the hydraulic fluid, leading to a force application on the material. This makes an internal transition of the fluid through the pump system. The transition force causes the material to bend. Once the bending is done, the hydraulic fluid will be exhausted via the exhaust system.
Yes, the machine can test other materials like plastics and wood. But that is only possible where the materials have mechanical and thermal stability that allows them to withstand bending.
Bound the machine and its surroundings. Also, people around the machine should be fully aware of the dangers involved in such a working machine. Basic safety features, such as guards over moving parts and automatic stops, must be in place.
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