What are the factors that affect the bending accuracy of the press brake ?
Nowadays, the press brake is used in various industries, CNC press brake is widely used in automobile manufacturing, aerospace, sheet metal manufacturing and other mechanical processing, manufacturing, although the development of press brake is very fast, but a good bending function to improve industrial capacity, help metal manufacturers to success. So, what can we do to get higher accuracy on the press brake?
Before obtaining the answer to this question, we need to first understand what factors affect the bending accuracy of the press brake ?
Press brake is a special cutting machine mainly used for sheet metal processing. The bending quality affects the precision of the product and the completion time of the product. The accuracy of the Press Brake mainly depends on the quality of the machine and the correct bending operation. Generally, there are three factors affecting the accuracy of the press brake: the workpiece input accuracy, the tooling accuracy and the adjustment accuracy of the machine.
1. Workpiece input accuracy:
The accuracy required for workpiece input is determined by product size, product size tolerance and bending size. The tighter the geometric tolerance, the higher the input accuracy requirements of the workpiece, the larger the clearance, the lower the accuracy requirements. Therefore, in the selection of materials, must choose to meet the size requirements of the material, and in each link of the processing need to use the appropriate tools to measure and control the size of the workpiece.
2. Precision of tooling:
precision of tooling determines the accuracy and shape of bending parts. Therefore, the selection, combination and maintenance of the die must be accurate, especially the punch and die, play a decisive role in the accuracy of bending. The wear of the punch and the die affects the accuracy and shape of the bending parts. The clearance between the punch and the die must be constantly adjusted to ensure the accuracy of the bending parts.
3. Adjustment accuracy of the machine:
the adjustment accuracy of the machine will also affect the accuracy of the bending parts. The adjustment of the dynamic Angle and stroke of the press mechanism shall be carried out in accordance with the requirements of the process document. The clearance of the former shall be maintained evenly and the stroke adjustment shall be accurate.
There are a number of other factors under the subdivision, including the deformation characteristics of bending, material characteristics, bending tool design and clamping force, the structural design of the press brake, the expertise of the operator, etc.
1. Deformation characteristics in the bending process:
metal materials will experience two important stages in the bending process, namely elastic deformation and plastic deformation. In the process of elastic deformation, the new stress-strain equation will replace the old stress-strain equation, so that the internal stress increases, so that the metal is permanently changed into a certain Angle. If the elastic deformation is not controlled properly, the bending will be inaccurate because the internal stress will increase during the time the material waits before bending.
2. Material properties:
Material properties have a great impact on the accuracy of the bending machine. During bending, tensile strength, yield strength, ductility and ductility cause significant changes in the internal stress of a metal. If the bending Angle is too large, the metal may break during the bending process; If the bending Angle is too small, it may cause the metal to bend incorrectly. Therefore, it is important to select the appropriate material properties to achieve the desired degree of accuracy of the press brake.
3. Design and clamping force of bending tools:
The bending tools used in the bending process have a great impact on the accuracy. Contact surfaces and contours should be properly designed to ensure uniform distribution of contact forces. In addition, the stiffness of the support tool is also critical; The bending tool should apply even, balanced pressure to the material to obtain the desired bending Angle. Clamping force should be selected according to material properties and shapes.
4.The structural design of the press brake:
The structural design of the press brake also has an important influence on its accuracy. There should be sufficient clearance between the tool and the material to allow the metal to move freely; The size of the part, the curve of the bending edge and the die should all match to prevent deformation of the final product.
5. The expertise of the operator:
the accuracy of the press brake also depends on the expertise of the operator. The operator should have a good understanding of the characteristics of the material and the tool so that the bending parameters can be correctly configured. Moreover, during the operation of the press brake, the operator should pay attention to monitoring progress and correct errors in time.
To sum up, there are many factors affecting the accuracy of the press brake. The parts of the machine itself are also important factors affecting the bending accuracy, such as the positioning accuracy of the left and right ram and after the gauge system, the clearance of the punch brake slider and the linear guide rail of the frame, the verticality and inclination of the frame, the strength and accuracy of the frame, the strength and accuracy of the stamping parts, the computer system, the adjustment of the hydraulic system and the accuracy of the upper and lower die and so on. Therefore, it is very important to ensure the correctness of these factors to achieve the desired bending accuracy.
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use integral machining and tempering ultra high strength bed. The numerical control system can accurately control the Y1 and Y2 axes separately, making the block run synchronously. Advanced servo proportional valve through grating ruler real-time feedback, ensure extremely high bending accuracy and stability. Multifunctional numerical control system and high precision back ruler system, to achieve more flexible bending size and Angle. At present is a market the most mainstream is also the most popular high cost performance machine.
The choice of machine for production and processing ultimately depends on your production needs and budget. After understanding these, you can visit our website, if you need to learn more about the press brake knowledge or buy a machine, you can also consult our sales staff, they can recommend the most suitable for your press brake and so on.
