In addition to being used for thick plate stamping, stainless steel and 65 manganese steel shrapnel to understand stamping, the use effect of fine blanking die is also very good. Engineer Li's words woke me up.
I never thought that 8566 die steel could be used for fine blanking.
2. Select die steel with high hardness, good wear resistance, and good anti-chipping performance, such as: high vanadium series products of powder high-speed steel, and if the mold is polished, you can solve 3 problems at one time.
3. In the field of automotive fine blanking special steel, domestic enterprises have achieved breakthroughs and opened up import substitution in the field of products with relatively low technical and performance requirements such as seat recliners, seat belts and other auxiliary device parts, such as 20mnbs28cb for recliners.
4. PM23, PM30, PM60, 8566 and other imported materials are good for continuous die fine blanking.
Before answering the question of fine blanking die, what die steel should be chosen, let's first take a look at the characteristics of fine blanking die and the performance requirements for die steel.
5. PM23, PM30, PM60, 8566 and other imported materials for continuous die fine blanking are good. The gap between the concave and convex dies of the fine blanking die is small.
The working environment is cruel, and there are generally four kinds of defects, such as: rounding, brushing, deformation, and cracking.
6. Fundamental characteristics of common materials used in mold parts At present, the materials used for mold parts include general carbon steel, tool steel, cemented carbide, cast iron, cast steel, zinc-based alloy, low melting point alloy, polyurethane, synthetic resin, etc. During this period, all kinds of tool steels are the primary information for mold parts.
1. The highest ones are DC5LD, 8566 second generation, and 8caldie. The hardness is between HRC60 and 62, the hardness is slightly smaller is 8566, and the hardness of die steel is HRC58 to 60, and its chipping resistance is 4 times that of high-speed steel SKH-51 and 2 times that of D2.
2. X40CrMOV51 hot work steel, 40CrMnMo7 pre-hardened plastic mold steel, C45W medium carbon steel, etc. It has high hardness, strength, wear resistance, sufficient toughness, and high hardenability and hardenability.
Mold steel is also a popular die steel, which is widely used in plastic products and auto parts manufacturing. The tensile strength of 718 die steel is very high, which can reach 120MPa, and the hardness is between 30-3HRC. The advantage of 718 die steel is high precision and uniform hardness. It also has excellent cutting properties for very precise molds.
S and 718H pre-hardened plastic mold steel: good polishability, good wear resistance, high tensile strength. It is often used for high-polish and demanding internal mold inserts. Suitable for plastic molds such as PA, POM, PS, PE, PP and ABS. ？Factory hardness (hardened and tempered): 718S---HB290—330. 718h---hb330—370。
5. Acid-proof die steel, suitable for the production of PS, SAN and other German JS237 characteristics and applications Good quenchability, small heat treatment deformation, wear resistance and impact resistance. It is suitable for cold extrusion forming, drawing die, punching die, precision stamping die, and high hardness material punching die.
S and 718H pre-hardened plastic mold steel: good polishability, good wear resistance, high tensile strength. It is often used for internal mold inserts with high polish and high requirements. Suitable for plastic molds such as PA, POM, PS, PE, PP and ABS. Factory hardness (hardened and tempered): 718S---HB290—330. 718h---hb330—370。