Press Brake Metal Bending Dies

Yawei AHYW Press Brake Metal Bending Dies China manufactures factory

The die of the bending machine is selected according to the workpiece. The die of the lower bending machine is briefly introduced.

From the shape of the upper die is divided into: conventional knife, large curved knife; the lower die is the most commonly used square die, its application range is the widest. The die holder can be added under the square die (abbreviated as die holder) and the component section die (sectional die) can be made to facilitate the processing of small metal workpieces. Double V-slot V4-V7 V5-V9 V6-V10 V7-V11 V8-V12 V15-V18, etc. Single V slot V4 V5 V6 V7 V8 V10 V12, etc.

Horizontal seat: single groove die base and double groove die base (low, medium, high).

The upper and lower dies are generally made of 70, T7 and T8, and the better 42CrMo materials. The main requirements are high strength, high toughness and good wear resistance. The cold working die steel is selected. The hardness of quenching reaches 48-45 degrees for the upper dies and 42-45 degrees for the lower dies. The upper dies are harder than the lower dies. Upper die requirements, first of all, high surface hardness, followed by wear resistance, and finally not easy to break tensile strength.

According to the thickness of material, the choice of V groove is different. When S is less than 4mm, V groove = T* (6-8 times); when S is more than 4mm, V groove = T* (8-10 times). Take out the center of the machine tool with the upper and lower dies of at least 300MM in length. Pay attention to the proper pressure to avoid crushing the die.

Different workpiece materials because of their own structure, the tools used are also different, resulting in different wear resistance, tensile strength, material hardness, tensile coefficient, plasticity and so on. When choosing the die, the reasonable choice can be made according to the machine tool pressure, structure, material, workpiece expansion size, process requirements, surface treatment and so on. Generally, the notch width of the lower die can be chosen for the iron plate type, which is 7-9 times the thickness of the material and not less than 7 times. The groove of stainless steel selection lower die is 6-8 times of material thickness, not less than 6 times. Aluminum, copper can choose the groove of the lower die is 6-8 times the thickness of the material, not less than 6 times (should avoid surface cracks when bending).