In the production of sheet metal industry, there are many factors that affect the accuracy of one-time forming products. The most important one is the quality of the bending machine tools. Due to the use of one-time forming technology in the production process of instrumentation and other components, the tools are very demanding. For compatibility, the contact surfaces need to maintain a high degree of consistency; therefore, if the tools matching performance is not good, it will inevitably affect the accuracy of the tools product, and in serious cases, the workpiece may be scrapped. Come and find out with HARSLE!
In the production of bending machine tools, the precision of the product is directly related to grinding. In most cases, the forming tools are realized by the forming grinding wheel, and the grinding accuracy will change with the speed of the grinding machine. Under normal circumstances, the accuracy of the product will be relatively stable when the speed is not high, and the grinding accuracy can be improved by modifying the forming grinding wheel several times. The measurement accuracy of the final product will also directly affect the processing accuracy. If the final inspection is not meticulous enough and does not reach the qualified accuracy range, such a product will definitely have problems in use.
In addition, in addition to the factors of the tools, the material of the product to be formed will also affect the forming accuracy, especially when processing materials such as stainless steel, the extremely hard plate will appear low at both ends and high in the middle during forming. If processed according to the same specifications, the formed products will have different sizes. In view of this situation, the processing parameters of the machine tool need to be adjusted, and high-hardness tools that can meet the processing of different plates are required, thereby reducing the deformation of the plate and the wear of the tools.
Comparing the processing speed of stainless steel with the bending speed, when the workpiece reaches the processing range, adjusting the processing speed can better shear so that the bending speed can be synchronized with the plate so that the two sections and the middle part of the plate can maintain the same straight line. The occurrence of processing can not only improve the qualified rate of products but also improve the processing efficiency of machine tools and prolong the service life of the equipment.
Bending machine die installation adjustment:
When installing the bending machine tools, be sure to check the status of the equipment, and then follow the steps to install and debug, and pay attention to personal safety when debugging.
First of all, it is necessary to understand the performance of the machine, open the bending machine, adjust and check patiently, and see if the machine has dust and iron chips that have been used before. Prevent unnecessary trouble for later use.
Slider stroke adjustment：
First, check whether the ratio of the thickness of the folding bed tools to the upper and lower modules is normal. The general slider needs to be controlled at the switch point of the stroke line. This must be paid attention to, otherwise, the tools will not be able to be used normally, but some people still often do this mistake.
Stroke Module Adjustment：
After adjusting the slider stroke standard, the next step is to adjust the upper limit point of the module. Generally speaking, when the module goes up to the highest point, it is necessary to set the module and switch. In this way, it is possible to flow out of the staying position of the module, and through some of the above operations, the production efficiency can be greatly increased. During this process, the module also needs to be slowed down. Because when the module goes down to the bottom dead center, it must decelerate the module, which protects the machine and the tools.
Finally, the gap between the upper and lower tools of the bending machine is adjusted. First, measure the gap between the upper module and the lower module. The reasonable gap needs to be determined according to the sheet to be folded.
Adjusting the bending angle is also the most important part. The selection of the angle must be related to the product requirements. Generally speaking, when a 90° tool is folded, the angle must be set in the middle and must be larger than the angle on both sides. Sometimes it may be tight, and it can be adjusted by adjusting Screws on the machine are processed. After adjustment, do not modify it if the product does not change the requirements. Then when bending, through the pressure gauge, calculate the accurate pressure number and adjust the pressure. To avoid tool chipping.
Any product used for a long time will wear out, and the bending machine tools are no exception. Can the bending machine tools be worn? The main reason for the wear of the die of the bending machine is that in the process of sheet metal processing, local bending causes the die to be worn out by bending pressure at a fixed point for a long time. Excessive pressure may cause scratches on the lower die, which will accelerate the upper and lower die. degree of wear. The best way to solve the wear caused by local bending is to process multiple workpieces at the same time, which can distribute the pressure of the bending machine and avoid damage to the tools due to pressure concentration.
The grinding of the bending machine tools is a necessary procedure for the post-repair of the worn tools in the sheet metal processing plant. No manufacturer will use a set of bending machine tools for several years without grinding. very bad.
Under what circumstances should the bending machine tools be repaired?
When the angular deviation of the bent workpiece is large, or the surface roughness of the workpiece is large, the tools should be repaired in time to change the passivation of the tools and prolong the service life. Under normal circumstances, before processing, the sheet metal master must first check the upper and lower tools of the bending machine. When there are obvious wear marks on the surface, it should be necessary to repair the tools. The fewer cycles and times of tools grinding, the easier it is to shorten its service life, reduce the quality of the workpiece, increase the load of the machine tool, and reduce the qualified rate of the product.
How to repair the bending machine tools? There are many ways to grind the tools, the most common one is to put the tools on a special fixture and then place it on a precision grinder for processing, especially the arc tools (R tools) and the forming tools, which need to be equipped with high precision grinding wheels and repair tools. Every time you grind, you should keep the near-knife amount at 0.03mm~0.05mm. Repeated grinding will not only fail to complete the processing but also cause great damage to the tools, which is generally not recommended. It is enough to correct most of the repairable areas in an appropriate amount. After the final grinding is in place, fine grinding is carried out, which is conducive to improving the precision of the CNC bending machine tools and facilitating installation and debugging.
Reasonable grinding of CNC bending machine tools is a necessary process for processing enterprises, and improving the accuracy and service life of tools is also another way to help enterprises increase efficiency.
What are the main factors that affect the wear of CNC bending machine tools?
The die material of the controlled press brake is the basic factor that determines the cutting performance of the die of the CNC press brake. When the helix angle is small, the cutting edge length of the same cutting edge cutting into the graphite workpiece at the same time is the longest, the cutting resistance is the largest, and the cutting impact force of the CNC bending machine tools is the largest, so the tools wear, milling force and cutting vibration of the CNC bending machine are the largest. When the helix angle is large, the direction of the milling resultant force deviates from the surface of the workpiece to a large extent, and the cutting impact caused by the fracture of the graphite material is intensified, thereby increasing the die wear, milling force, and cutting vibration of the CNC bending machine. front corner. When the graphite is processed with a negative rake angle first, the edge strength of the CNC bending machine tools is better, and the impact resistance and friction performance are better. With the decrease of the absolute value of the negative rake angle, the wear amount of the flank face does not change much, but the overall trend is decreasing. When the graphite positive rake angle is processed, the edge strength of the CNC bending machine die decreases with the increase of the rake angle, and the flank wear of the guide bending machine die increases.
When machining with a positive rake angle, with the increase of the rake angle, the strength of the cutting edge of the CNC bending machine die is weakened, resulting in an increase in the wear of the rear rake face. What are several reasons that affect the wear of CNC bending machine tools? Secondly, the geometric angle of the CNC bending machine die is determined by the structure. It is not difficult to see from the previous article that the tools of the CNC bending machine play a very important role in today’s mechanized equipment. However, there is no doubt that these machines will have some wear and tear during long-term use, so daily machining will inevitably wear out during long-term use. What should we pay attention to in the process of use and what measures should be taken to reduce the degree of wear and tear, thereby prolonging the service life of the machine? First of all, it can be seen that the die of the bending machine has good impact resistance and friction resistance. With the decrease of the absolute value of the negative rake angle, the wear area of the flank rake face has little change, but the overall trend is decreasing. When machining with a negative rake angle, the cutting resistance is large, which increases the cutting vibration. When the large positive rake angle is processed, the tools of the CNC bending machine are seriously worn and the cutting vibration is also large. The clearance angle, if the clearance angle increases, the strength of the die-cutting edge of the CNC bending machine and the CNC bending machine will decrease, and the wear area of the flank surface will gradually increase. Vibration is enhanced.
Combining the above, it is not difficult to see that the main factors affecting the die wear of the CNC bending machine are mainly due to the influence of angle changes on the die wear, milling force, and cutting vibration of the CNC bending machine. caused by the combination. Therefore, it is also suggested here that you must pay more attention to future use, regularly carry out related inspections and maintenance, and strive to reduce the die wear of CNC bending machines.
Optional Bending Machine Tools
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