What is the difference between a CNC bending machine and a C

Release time：2021-03-25 13:59 Pageviews：

CNC bending machine: The upper and lower molds are respectively fixed on the upper and lower worktables of the bending machine, and the relative movement of the hydraulically driven worktable is combined with the shape of the upper and lower molds to realize the bending and forming of the plate.

CNC Folding Machine: The motor drives the upper slide block to compress the sheet, and the hemming beam rotates from bottom to top, thereby driving the sheet to be bent into shape.

In terms of sheet forming, the CNC bending machine and the CNC folding machine are compared from the following six aspects:

⑴ Different forming principles

　　Bending machine-control the bending angle by controlling the amount of pressure on the upper knife. When bending the short side, the operator needs to hold up most of the external material. When bending large workpieces, two or more More employee collaboration.

　　Folding machine-After the plate is laid flat on the workbench, the edge holder is pressed down to fix the plate, and the edge holder is turned upwards and downwards to realize hemming. In all hemming processes of one edge, manual participation is no longer required. Positioning and auxiliary turning and positioning work.

⑵ Different bending accuracy

　　Bending machine-the dimensional accuracy of the control is the dimensional accuracy of the short side of the back gauge positioning. After the bending is completed, the final error accumulates to the inner hollow size. At the same time, the bending angle is controlled by the lower pressure of the upper die. This angle is related to the thickness of the material.

　　Folding machine——The dimensional accuracy of the control is that after the first hemming is completed, the first edge is used as the positioning reference. The final controlled size is exactly the inner hollow size required by the customer, and the bending angle is directly controlled by the flanging angle , Has nothing to do with the thickness of the material.

⑶ The surface of the material is scratched and damaged

　　Bending machine-when working, the material will produce relative movement in the lower die, leaving indentations without surface protection. When bending large workpieces, it needs to be turned and moved many times, and scratches will inevitably occur in the process.

　　Folding machine-When working, the blank holder and the flange cutter do not move relative to the material, thus completely avoiding surface damage. When the large workpiece is bent, because the plate is processed flat, all the processing of one side of the workpiece can be completed at one time at the same time, completely avoiding surface damage.

⑷ The requirements of workers' technical level are different

　　Bending machine-relatively higher requirements for the technical level of the bending workers.

　　Folding machine-programming can be achieved intuitively by drawing with fingers or the engineer can use software to achieve offline programming and use USB or network connection to import the processing program. After the programming is completed, the main work of the worker becomes simple loading and unloading Work without skilled bending workers.

⑸ Tool configuration

　　Bending machine-products with different thicknesses and shapes require different upper and lower molds. When realizing some special bending (such as arc) requirements, it is necessary to replace the tool or transfer to another machine tool to achieve this, increasing the transfer and transfer of semi-finished products. Temporary work.

　　Folding machine——By configuring a rotatable blank holder beam and installing two sets of blank holder tools at the same time, a single station can complete all the bending procedures. For arc bending or other special bending requirements, there is basically no need to replace the tools, just It can be fully realized by making changes in the program.

⑹ Tool life

　　Bending machine-due to the relative movement of the workpiece in the die, the tool will wear out and need to be maintained or replaced.

　　Folding machine-basically avoids the relative movement between the material and the tool, the tool is almost wear-free for long-term use, and the tool life is greatly extended.

⑺ Drive system

　　Bending machine-hydraulic drive, which brings more maintenance work and is susceptible to environmental factors.

　　Folding machine-adopts full electric drive design, which reduces maintenance workload and has nothing to do with the use environment, so as to achieve higher bending accuracy.

⑻ Disadvantages of folding machine

　　1) Due to the different bending principles, the R angle of the folding machine is larger than that of the bending machine;

　　2) Due to the limitation of the support table, the workpiece that is turned down on both sides cannot be processed;

　　3) The size of the workpiece is limited by the compression area of the upper die, and the workpiece smaller than the size of the compression area cannot be processed;

　　4) The efficiency is not as high as the bending machine;

　　5) Due to the structural characteristics of the bending machine and the diversity of molds, some complex shapes can be simply realized by the bending machine. Relatively speaking, the flexibility of the folding machine is poor;

　　6) Folding machines are currently widely used in Europe and the United States. Influenced by the traditional Japanese processing concept, we generally use bending processing, and there is no better use of folding machines.