How To Get A Perfect Metal Cnc Press Brake Bending
There are several steps you should take when setting up a press brake if you want to get a perfect bend.
For instance, if you are bending 50mm material on a V-die with a quarter inch opening and your accuracy is off by a mere two thousandths of an inch, you will wind up with a 9 degree change in your bend! Setting up your press brake properly with the following steps will help you get the accurate bend you are after, how to get a perfect metal bending when use one CNC Press brake metal bending brakes from China
Calibration. The first thing you should do is check and make sure your press brake is calibrated properly. Verify that the press brake’s ram (the Y-axis) is referencing correctly, which means that it repeats to the identical Y position (or depth) each time it cycles. Also check to determine if crowning is needed to avoid distorting your material. By making a test bend you can see if the middle of your material is wider or narrower in the middle than at the ends. If your 90° bend is bowed out like a canoe in the middle, then the material is deflecting and crowning compensation is needed.
Tooling. Ensure that you have the correct upper press brake tooling and bottom dies for the job you are bending. Your tooling needs to be able to handle the tonnage needed based on several factors: your V-die opening, your minimum flange length, your material thickness and the inside radius of the formed part. I personally recommend always using precision ground and hardened tooling from a reliable manufacturer.
Control. If you are using a CNC control, it is absolutely critical to know the exact dimensions of your cnc press brake punch and die (height, radius, V-opening, etc.). You then must be sure to draw your tooling correctly as you input it into the control.
Seating. Verify that your tooling is seated correctly. Anhui Yawei would recommend quick released cnc press brake clamping, which not only saves time and money, but will seat the tools perfectly every time.
Material. The final thing to examine is the material itself. In order to keep the parts consistent, check the following aspects of the blanks with each job: type of material, thickness of each batch, tensile and yield strengths, grain direction of each piece and whether the material is free of burrs.
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