Metal Stamping Parts OEM Manufacturer

Types of Metal Stamping

Metal stamping covers a range of forming operations that use dies and presses to shape flat sheet metal into finished parts. The main stamping types used in OEM parts manufacturing include blanking, punching, bending, deep drawing, embossing, and progressive die stamping. Each process suits different part geometries, production volumes, and precision requirements.

Blanking cuts a flat shape from sheet metal in a single stroke — this is often the first step in a multi-operation stamping sequence. Punching creates holes or cutouts within a blank. Bending forms angles and flanges along a straight axis. Deep drawing pulls flat sheet into a cup or box shape with significant depth, commonly used for housings and enclosures. Embossing creates raised or recessed patterns on the surface without cutting through the material. Progressive die stamping feeds a continuous strip through multiple stations in one press, completing several operations per cycle — it is the most efficient method for high-volume parts with complex features.

Stamping Process Comparison

Common Stamping Materials

The material you choose for a stamped part directly affects its formability, strength, corrosion resistance, and cost. Below are the most commonly used sheet metals in OEM stamping production and their typical applications.

At Meituo, the majority of our stamping production uses cold rolled carbon steel and galvanized steel for home appliance and industrial components. Stainless steel and copper alloy stamping are available for projects with specific corrosion or conductivity requirements. Material selection is confirmed during the DFM review stage based on your part drawings and application data.

Material Compatibility with Stamping Operations

Not every material works equally well across all stamping processes. Formability, springback behavior, and work hardening rate all affect which operations a material can go through and how many forming steps are needed.

Cold rolled carbon steel like SPCC has excellent formability and is compatible with nearly all stamping operations — blanking, bending, deep drawing, and progressive die stamping. Galvanized steel performs similarly but requires attention to coating integrity during forming; sharp bends can crack the zinc layer and reduce corrosion protection at the bend line. Stainless steel has higher strength and more springback than carbon steel, so bending angles need to be over-bent to compensate, and tooling wear is faster. Copper and brass are soft and form easily but tend to gall against tool surfaces, requiring lubrication and sometimes surface-treated tooling. Aluminum alloy is lightweight and corrosion resistant, but its tendency to crack during deep drawing limits the draw depth achievable in a single operation.

Precision and Durability in Stamped Parts

Dimensional precision in stamped parts depends on three factors: die accuracy, press rigidity, and material consistency. A well-built die with proper clearances produces clean edges, accurate hole positions, and consistent bend angles across thousands of cycles. Press tonnage must match the material and operation — undersized presses cause inconsistent forming and accelerate die wear.

For parts that require tight dimensional control — such as appliance hinges where two-axis pin hole concentricity must be held within 0.2 mm, or axle plates where flatness after stamping is critical — we use dedicated fixtures and in-process gauging to verify critical features during the production run. Progressive die stamping inherently provides better repeatability than single-station operations because the strip is guided through each station with pilot pins, maintaining consistent positioning throughout the cycle.

Part durability after stamping is closely tied to material selection and surface treatment. A galvanized steel hinge with electrophoresis coating can achieve salt spray resistance exceeding 36 hours, as demonstrated on our current appliance hinge production. For parts exposed to higher corrosion risk, powder coating or painting over galvanized substrate provides additional protection. The combination of proper material grade, controlled forming, and appropriate surface treatment determines the long-term service life of a stamped component in its end-use environment.