In my country’s automobile, aircraft manufacturing, light industry, shipbuilding, containers, elevators, railway vehicles and other industries, there is a CNC machine tool that is widely used. Unlike ordinary machine tools, it is often larger in size and has a strong bite force. , I believe netizens have guessed its name, it is a sheet metal CNC press brake bending machine.
When most users choose a sheet metal CNC press brake bending machine, they mainly consider the material grade, as well as the maximum processing length and thickness, which is relatively easy to understand. Of course, this refers to the situation of the user’s own processing of items, which can make precise selections. Only in this way can the cost of output be reduced. It should be known that whether the selection of the press brake bending machine is appropriate or not can be directly related to The issue of cost.
Generally speaking, it depends on what type of parts the user wants to produce and chooses to determine their maximum press brake bending machine conditions, without having to choose those unnecessary tonnages. In addition, in order to select the lowest tonnage specification, it is possible to choose a thickness greater than the thickness of the parts made by itself. In this case, it can ensure that the machine does not perform load work under certain conditions and ensure the service life of the press brake bending machine. Of course, if the tonnage is too large, it will affect the accuracy of the manufactured parts, but if it is slightly larger, it will not affect.
What the user needs to do is to carefully consider the material grade and the maximum processing thickness and length. If most of the work is low carbon steel with a thickness of 16 gauge and a maximum length of 10 feet, then the free bending force does not need to be greater than 50 tons. However, if you are engaged in a large number of bottomed die forming, perhaps a 150-ton machine tool should be considered. Assuming that the thickest material is 1/4 inch, 10 feet of free bending requires 165 tons, and bottomed die bending (correction bending) requires at least 600 tons. If most parts are 5 feet or shorter, the tonnage is almost halved, which greatly reduces the cost of purchase. The length of the part is very important to determine the specifications of the new machine.
Of course, the choice of the press brake bending machine is mainly based on the user’s own situation, which is certain, and it is also a direct factor in reducing production costs. The press brake bending machine can also be used to press the dead edge of the workpiece. First, the workpiece is bent to 30 degrees, and then the workpiece is pressed to death with a flat knife. Generally, the dead edge that can be completed with a normal punch is not arranged on the press brake bending machine as much as possible, because the punch presses The dead side effect is relatively better. When arranging the process, it is often necessary to consider whether it is easy to bend and whether it can be bent. Because bending is a very important process, whether the bending is good or not directly affects the guarantee of bending quality, and many times it appears. The quality problems of the product are all caused by the bending size is not well controlled, so special attention should be paid to the bending problem during the design process, which is related to the stability of the quality of the product during mass production.
In the actual bending process, various problems will be encountered. In many cases, the influence of bending on other processes must be considered. In many cases, specific problems must be analyzed in detail, and the process must be properly arranged. At the same time, in some special needs, the supplier will also manufacture special bending knives, but if the shape of the tool is stranger or the curvature is larger, it will inevitably affect the rigidity of the tool and shorten the tool life. At present, the development of sheet metal CNC press brake bending machines is also facing many challenges. The application of CNC systems, CAD and CAPP and flexibility are developing rapidly. However, my country’s sheet metal CNC press brake bending machine industry wants to continue to develop and grow. there’s still a long way to go.