AHYW 4m Brake Press Machine 200T Yawei manufactures China
AHYW 4axis cnc synchro brake press 4m bending machines
AHYW 4m servo electro hydraulic cnc pressbrakes factory China is one full Electro Hydraulic Servo motor&drive Synchro CNC pressbrake, this 4 axis AHYW 200Ton4m can bending 6mm carbon steel and 3mm stainless steel, with Max 4m&13ft sheet metal bending length.
How to Choose the correct press brake top punches for your 4m sheet metal bending machine?
4M PRESS BRAKES PUNCHES
1. Except European-Amada type press brake tooling system, all press brakes punches should be able to be loaded and unloaded vertically. Sliding tooling in and out the end of the machine is time consuming and costly.
2. For cnc press brake air bending applications, use acute angle punches whenever possible for bending materials of 3mm in thickness and less. They are fairly strong, have more than adequate compensation for springback with virtually all material types and can bending almost any angle you’ll ever need to produce on a cnc press brake.
3. Use goose neck top punches for bending parts that have return bends and complicated bend sequences. Their large relief areas make them extremely versatile and helps to reduce the need to make metal bending punch changes when going from one part configuration to another.
4. When the bending machine daylight allows, always choose longer press brake punches when tooling up a new press brake as they are always more versatile than short punches. As a general rule, we recommend that you leave approximately 100mm of return space between the punch and die after the clamping system, top punch, bottom die and all kinds of cnc crowning system.
5. Only ordering press brake punches with hardened working surfaces, and the deeper the hardened zone is the better. Hardened working surfaces not only maximize press brake tooling life and provide a better return on your cnc press brake investment, they also provide maximum long-term accuracy retention. This is extremely important when bending parts on a precision CNC press brake, as the punch tip and the shoulder radius on the dies are the only surfaces that ever come into contact with the material.
6. Never allow the material thickness to exceed three times the press brakes punch tip radius when bending 4mm mild steel and thinner. When bending materials that are thicker than 4mm mild steel, never allow the material thickness to exceed twice the punch tip radius.
7. If you are bending stainless steel or aluminium or Galvanized sheet , you may require punches with special tip angles and/or special tip radiu.
Air Bending for CNC Synchro Press brakes
Sheet Metal Air Bending is the most common form of press brake forming we see today for a combination of reasons. First it requires far less metal bending pressure to achieve, second a simple 85° lower Die can achieve multiple angles and lastly less tooling is required making the overall investment costs much cheaper in the long run. There also is even less contact made with the material being bening.Air bending works by forcing the sheet material only far enough into the bottom die to achieve the desired angle plus a little bit more to compensate for the material springback. Again, different bending angles can be done using the same set of press brake tools . The thickness of the sheet metal, its ductility, hardness and springback will determine the angle of the punch and die. This method allows for more accuracy because of its flexibility but requires an accurately positioned machine and accurately ground tooling to achieve success easily.
How to Testing Your Sheet Material Bending before starting mass bending production?
Once your press brake tooling and material is set up correctly, perform some simple or short material bending before you go into production. If the material is bowing instead of bending straight, adjust your clamps wedges or crowning table. Check each bending step to ensure there are no any issues.
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