There are many factors that affect the accuracy of the press brake, including the mechanical factors of sheet metal press brake, mold factors, human operation, and other factors. In this article, we will discuss the various factors affecting the accuracy of bending, and meet some of the common situations proposed solutions.
Mechanical factors
1. Press brake slider opening straightness: left and right slider repositioning and arbitrary positioning accuracy, opening accuracy in the Y and X directions are critical to the bending accuracy, if the opening is not straight, it will lead to bending angle and position deviation.
2. Whether the gap between the slider and the frame rail is reasonable: the gap between the slider and the frame rail is appropriate and reasonable to ensure the stability of the slider in the process of movement, and thus improve the bending accuracy.
3. The hydraulic system and computer system match whether the adjustment is in place: the hydraulic system needs to provide accurate and repeatable pressure and flow, to ensure the accuracy of the hydraulic valve, pump performance, and the sealing of the entire system, and the control system and the interface between the hydraulic system accuracy determines the overall bending accuracy.
4. The verticality and inclination of the frame: the verticality and inclination of the frame will affect the distribution of the bending force in the bending process, thus affecting the bending accuracy.
5. Connection between the cylinder and ram: The connection between the cylinder and ram must be kept consistent to ensure that the bending force remains evenly distributed during the bending process of the press brake.
6. Rear stopper system repositioning, arbitrary positioning accuracy (X direction and R direction): the rear stopper is used to control the position of the material during the bending process, and its positioning accuracy should allow the press brake to move to the same position during multiple movements, thus ensuring the consistency and accuracy of the bending.
Mold factors
1. Mold alignment: upper and lower mold misalignment will lead to bending size deviation, before bending to ensure that the tool is correctly aligned. Backstop in the left and right displacement will cause the lower mold and backstop distance changes, which can be used vernier calipers and backstop screws for adjustment.
2. Upper and lower die precision: prolonged use will lead to deformation, damage, wear, and tear of the mold, which in turn affects the bending accuracy, so regular maintenance and inspection of the mold is very necessary.
3. V-shaped die opening size: plate length and thickness for a fixed value, the larger the opening the smaller the pressure required, in the processing of different thicknesses of plates, the need to use the appropriate opening size, if the size does not match the bending accuracy will be affected.
Material factors
1. Plate datum straightness, thickness is consistent: plate datum straightness is not enough, will lead to the processing of parts size inaccuracy, thickness inconsistency will lead to uneven force in the processing of materials, may cause deformation, cracks, will affect the accuracy of bending.
2. Material properties of the plate: the yield strength and modulus of elasticity of the material to help determine the maximum force exerted in the bending and the amount of rebound after bending, for the bending process has a great impact on the accuracy.
Human factors:
- Operator action inconsistency: the operator pushes the material bending left and right force is not consistent, resulting in bending size deviation.
2. Data error in the system: when the workpiece is adjusted or the material changes, the system is not adjusted to the corresponding data.
Measures to maintain the accuracy of the bending machine:
- Daily inspections and regular maintenance: Operators routinely need to ensure smooth machine operation by checking for machine wear and verifying that the proper hydraulic fluids and lubricants are at the correct levels. To maintain precision bending, regular maintenance is required, including changing hydraulic filters, checking the integrity of the electrical system, and ensuring that all safety features are functioning properly.
- Avoid bending errors and reduce spring back: Using empirical data and software simulations to predict the behavior of simulated materials and adjust angles accordingly can result in more accurate results for the desired product, reducing the number of reworks and machine wear.
- Good and stable machining environment: Stable temperatures reduce the impact on the hydraulic oil and hydraulic system, while good lighting helps operators see the process and results more clearly, and lower noise levels help to minimize audio and visual fatigue, improve concentration, and reduce the likelihood of incorrect operation.
Conclusion:
Improving the bending accuracy of a bending machine requires a number of factors to be considered. In addition to routine maintenance and care of the bending machine, adjusting the bending machine components as well as the system, and performing the correct bending steps, attention should also be paid to the stability of the external environment.
In addition to investing in a high-quality, long-life bending machine is another effective way to ensure bending accuracy, WEIYA Machinery is a machinery company with twenty years of professional experience in the sheet metal industry, the need for more information about bending machines welcome to browse our official website—https://www.weiyamt.com/
