about press brake die
Bending machine mold, in the metal sheet metal processing industry is very widely used, is the bending machine is used to process metal sheet metal a common tool.
Bending machine tooling can be divided into two main categories, one for the upper die (convex die) and its accessories, a lower die (concave die) and its accessories. The upper die components include the upper die fixture, upper die, die handle, die head, etc. The lower die components include the lower die, the lower die, and the lower die. Lower die components include lower die, lower die holder, die holder, die clamps, etc. These can be combined with each other. These can be combined with each other. All of these need mold materials to manufacture.
The bending machine mold is used in which the upper die (convex die) extrudes the surface of the plate, and the lower die (concave die) restricts the surface of the plate, so as to deform the plate into the shape we want to get. In this process, the plate is bent and deformed, the material inside the bent fillet is compressed and the material outside the plate is stretched. During the whole process, the mold material and the plate inevitably squeeze and rub against each other, so the mold material will produce irreversible wear after a long time of use. The contact surface between the bending machine mold material and the workpiece is usually a new surface; the contact pressure is very high, sometimes exceeding the yield strength of the processed material; the temperature of the contact surface is very high, which can be up to 200 ℃ -500 ℃, and the maximum can be up to 800-1000 ℃, the mold material wear is usually a result of the combined effect of mechanical wear, thermal deformation and chemical form.
Because of this, when we choose the bending machine mold material, we have to consider several characteristics: hardness, heat resistance and wear resistance. We generally choose T8-T12 carbon steel to use, of which T10 with more, its toughness moderate, wear resistance can also be heat-treated hardness can reach up to 60HRC or more, and its production costs are relatively low, but its hardenability is poor, poor heat resistance ( 250 ℃ ). Ordinary bending machine mold used a lot. If you also want a better mold material, use 42CrMo high-strength alloy structural steel, 42CrMo belongs to the ultra-high-strength steel, with high strength and toughness, quenching is also better, tempering treatment has a relatively high fatigue limit and resistance to multiple impacts, can be in the 500 ℃ below the work. The hardness after heat treatment is about 45-48HRC is more appropriate. At present, most of the CNC bending machine molds use 42CrMo material. Better is the cold working die steel Cr12MoV, its material in the material to add an appropriate amount of chromium, molybdenum, vanadium and other alloying elements, improve the hardenability of steel and hardenability, so that the comprehensive mechanical properties of the quenched material is far more than the other types of steel, suitable for large cross-sectional area, complex shape, the use of a variety of frequent cold punching mold. The molds made of it have high precision and long service life, but the cost of materials used will be much higher.
With the advent of the twenty-first century, new materials, new technologies continue to emerge, there are some will be added to the bending machine mold materials, let us wait and see. Bending machine mold, the English name (PRESS BRAKE YOOL) in the metal sheet metal processing industry is very widely used, is a bending machine used to process metal sheet metal a common tool.
Bending machine tooling can be divided into two main categories, one for the upper die (convex die) and its accessories, a lower die (concave die) and its accessories. The upper die components include the upper die fixture, upper die, die handle, die head, etc. The lower die components include the lower die, the lower die, and the lower die. Lower die components include lower die, lower die holder, die holder, die clamps, etc. These can be combined with each other. These can be combined with each other. All of these need mold materials to manufacture.
The bending machine mold is used in which the upper die (convex die) extrudes the surface of the plate, and the lower die (concave die) restricts the surface of the plate, so as to deform the plate into the shape we want to get. In this process, the plate is bent and deformed, the material inside the bent fillet is compressed and the material outside the plate is stretched. During the whole process, the mold material and the plate inevitably squeeze and rub against each other, so the mold material will produce irreversible wear after a long time of use. The contact surface between the bending machine mold material and the workpiece is usually a new surface; the contact pressure is very high, sometimes exceeding the yield strength of the processed material; the temperature of the contact surface is very high, which can be up to 200 ℃ -500 ℃, and the maximum can be up to 800-1000 ℃, the mold material wear is usually a result of the combined effect of mechanical wear, thermal deformation and chemical form.
Because of this, when we choose the bending machine mold material, we have to consider several characteristics: hardness, heat resistance and wear resistance. We generally choose T8-T12 carbon steel to use, of which T10 with more, its toughness moderate, wear resistance can also be heat-treated hardness can reach up to 60HRC or more, and its production costs are relatively low, but its hardenability is poor, poor heat resistance ( 250 ℃ ). Ordinary bending machine mold used a lot. If you also want a better mold material, use 42CrMo high-strength alloy structural steel, 42CrMo belongs to the ultra-high-strength steel, with high strength and toughness, quenching is also better, tempering treatment has a relatively high fatigue limit and resistance to multiple impacts, can be in the 500 ℃ below the work. The hardness after heat treatment is about 45-48HRC is more appropriate. At present, most of the CNC bending machine molds use 42CrMo material. Better is the cold working die steel Cr12MoV, its material in the material to add an appropriate amount of chromium, molybdenum, vanadium and other alloying elements, improve the hardenability of steel and hardenability, so that the comprehensive mechanical properties of the quenched material is far more than the other types of steel, suitable for large cross-sectional area, complex shape, the use of a variety of frequent cold punching mold. The molds made of it have high precision and long service life, but the cost of materials used will be much higher.
With the advent of the twenty-first century, new materials, new technologies continue to emerge, there are some will be added to the bending machine mold materials, let us wait and see.