Selecting the right die according to the stamping parts is one of the key steps in stamping production, because the die directly affects product quality, production efficiency and cost control. This article will explain in detail how to choose the right die from multiple angles.

Select The Die According To The Process Requirements Of The Stamping Parts

Blanking Parts (Blanking, Punching, Trimming)

Die Type:

Select a blanking die or a composite die.

Features:

The die must have high precision to ensure that the cut is smooth and the size is accurate.

The wear resistance of the blade is high, and carbide or high-speed steel can be selected.

Bending Parts

Die Type:

Select a bending die or a flanging die.

Features:

The shape of the die should match the bending angle and size.

The material's rebound resilience should be considered and the appropriate amount of bending should be designed.

Drawing Parts

Die Type:

Drawing die.

Features:

The die should have good finish to reduce the friction of the material during the drawing process.

Select an appropriate blank holder to prevent wrinkling or cracking.

Calculate the drawing coefficient to avoid material deformation beyond the limit.

Formed parts

Mold Type:

Choose a forming mold or a multi-station continuous mold.

Features:

The mold structure is complex and the material fluidity needs to be considered.

High-precision mold processing ensures shape and details.

Multi-process parts

Mold Type:

Choose a progressive mold or a compound mold.

Features:

Complete multiple processes in one set of molds.

The mold must meet the matching accuracy of multiple stations and is suitable for mass production.

Select The Mold According To The Material Of The Stamping Part

Ordinary Carbon Steel

Mold Requirements:

Moderate hardness and good wear resistance of the mold edge.

The mold material can be Cr12 or Cr12MoV.

Stainless Steel

Mold Requirements:

Stainless steel has high hardness and strength, and the mold needs to have high strength and wear resistance.

It is recommended to choose carbide or high-alloy tool steel as the mold material.

Pay attention to lubrication during processing to avoid adhesion between the material and the mold.

Aluminum And Aluminum Alloy

Mold Requirements:

Aluminum is soft and easy to deform. The mold surface should be smooth to reduce material scratches.

Wear-resistant steels such as SKD11 or DC53 can be used.

Copper And Copper Alloys

Mold Requirements:

Copper is soft but easy to oxidize, so the mold needs to be smooth and corrosion-resistant.

Use high-finish mold steel or nitriding surface treatment.

Select Molds According To Production Batches

Small Batch Production

Mold Type:

simple mold, such as single-process mold.

Features:

Low manufacturing cost and simple design.

Applicable to scenes with low part complexity and small processing volume.

Large Batch Production

Mold Type:

progressive die or continuous die.

Features:

Can complete multiple processes at the same time with high efficiency.

The manufacturing cost is high, but it can be amortized to the cost per piece, suitable for long-term use.

Select Molds According To The Size And Precision Of Stamping Parts

Large-sized Workpieces

Mold Requirements:

The mold structure needs to be strong and can withstand the processing pressure of large-area materials.

Large punching machines are matched with molds to ensure the stability of processing.

Mold Type:

Step-by-step mold or large drawing die.

High-precision Workpieces

Mold Requirements:

Mold-cutting edges and cavities must have high processing accuracy.

The matching clearance must be precise, and a guide pin and guide sleeve structure must be used.

Mold Type:

High-precision molds, such as continuous molds for electronic products.

Select Molds According To Stamping Equipment

Press Tonnage

Ensure that the tonnage of the mold matches that of the press to avoid poor workpiece forming due to insufficient pressure or mold damage due to excessive pressure.

Equipment Type

Mechanical press: suitable for high-speed stamping and simple-shaped parts.

Hydraulic press: suitable for processes such as drawing and bending that require stable pressure.

CNC punch press: suitable for mass production of complex-shaped parts.

Other Factors Affecting Mold Selection

Economy

Choose the mold type according to the project budget. For example:

Ordinary molds can be used for small batches.

Long-life molds are preferred for large batches.

Mold Life

Mold materials with high strength and high wear resistance are suitable for mass production.

For experimental or short-term production, mold materials with lower costs can be selected.

Production Cycle

Determine the cycle of mold processing and debugging, and select a mold solution suitable for the project delivery date.

Case Analysis Of Stamping Mold Selection

Case 1: Automobile Cover Production

Product Features:

large size, complex curved surface, and high precision requirements.

Mold selection: Use large drawing die and multi-station mold.

Reason:

Ensure dimensional accuracy while reducing labor costs.

The mold needs to be durable to meet the needs of mass production.

Case 2: Mobile Phone Shell Stamping

Product Features:

small size, high precision, and thin material.

Mold selection: high-precision progressive die.

Reason:

Continuous processing process to reduce production cycle.

The mold edge needs to be smooth to avoid material scratches.

Case 3: Electrical Housing Processing

Product Features:

medium size, bending and punching combination.

Mold selection: combination mold or compound mold.

Reason:

Improve production efficiency and reduce mold adjustment time.

Complete punching and bending processes at one time.

Summary

Choosing the right mold for stamping parts is a multi-dimensional decision-making process, which requires comprehensive consideration of process requirements, material properties, production batch, dimensional accuracy, equipment conditions, and economy. Reasonable mold selection can not only ensure the quality of stamping parts, but also greatly improve production efficiency and reduce manufacturing costs. This is one of the core steps to achieve efficient production and enhance competitiveness.