1. Can you do small batch stamping?

Yes. Prototype or soft tooling allows for cost-effective small runs before committing to hard tooling for high volume.

2. What secondary operations are commonly needed?

Deburring, tapping, welding, staking, heat treating, plating, painting, and degreasing.

3. How long does tooling take?

Simple tools: 2–4 weeks; complex progressive dies: 6–10 weeks or more.

4. What surface treatment can you provide?

Powder coating, zinc plating, hot-dip galvanizing, polishing, wet paint, anodic oxidation, electrophoretic paint, passivation, etc.

5. Can Yixing technology Provide PPAP Services and Documentation?

Yes. We are quite familiar with the Production Part Approval Process for Automotive industry customers, which is also similar to documentation and project management required in the military, aerospace, and nuclear industries.

Auto Parts Stamping, High-Strength Steel Stamping Die, Automotive Chassis, Door Panel, Fender Forming Die

Automotive Parts Stamping Service

Automotive parts stamping are the backbone of modern vehicle manufacturing. At Yixing Technology, we specialize in designing and producing a full range of high-precision stamping dies—from structural body parts, pillars, and brackets to door lock components and braking systems. Our expertise spans across low-carbon steel, advanced high-strength steel (AHSS/UHSS), and aluminum alloys.

Car fender precision stamping forming die

Our Automotive Stamping Parts Capability

Parameter	Specification
Applicable Materials	Low-carbon steel, JIS SAPH310/370/400/440, AHSS (DP / TRIP), UHSS (hot-formed boron steel), Aluminum alloy
Sheet Thickness Range	0.5–3.2 mm (general steel); 1.6–14.0 mm (SAPH series)
Forming Tonnage Range	25T–1000T
Process Types	Drawing / Trimming & Piercing / Flanging & Restriking (+ multi-directional)
Dimensional Tolerance	±0.05–0.1 mm (precision parts); general stamping per QC/T 268
Springback Compensation Accuracy	±0.05 mm (CAE iterative compensation for AHSS/UHSS)
Surface Roughness (Class A)	Ra ≤ 0.8 µm (outer panels); Ra 1.6–3.2 µm (structural parts)
Die Steel	SKD11, DC53, Tungsten carbide (YG20 / YC20C)
Die Life	≥500,000 strokes (general); ≥300,000 strokes (dedicated)
Die Hardness	58–60 HRC

Material We support

Material	Typical Grade / Strength	Thickness Range	Stamping Characteristics
Low-Carbon Steel	DC04 / DC06, σb 270–350 MPa	0.8–3.2 mm	Good formability, low springback
JIS SAPH310	σb ≥310 MPa, σs ≥185 MPa	1.6–14.0 mm	Good formability, chassis/floor parts
JIS SAPH370	σb ≥370 MPa, σs ≥225 MPa	1.6–14.0 mm	Frame rails, control arms
JIS SAPH400	σb ≥400 MPa, σs ≥255 MPa	1.6–14.0 mm	Side rails, bumper brackets
JIS SAPH440	σb ≥440 MPa, σs ≥305 MPa	1.6–14.0 mm	Heavy-duty chassis, suspension arms
AHSS – DP	DP600–DP800, σb 580–980 MPa	0.8–2.5 mm	Springback control required
AHSS – TRIP	TRIP600–TRIP780, σb 600–800 MPa	0.8–2.5 mm	Better elongation than DP
UHSS – Hot-Formed Boron	22MnB5, σb ≥1500 MPa	1.0–2.5 mm	Hot stamping, water-cooled die
Aluminum Alloy	5052 / 6016, σb 210–500 MPa	0.5–4.0 mm	High springback, anti-galling needed

What kind parts we can make ?

Body panels – door, fender, hood (Class A surface)
Structural parts – B-pillar, bumper beam, brackets
Chassis parts – frame rails, cross members, suspension arms
Functional parts – brake components, door lock parts

From outer panels to safety-critical structural and functional parts, we deliver precision stamping for every automotive application.

Process Selection Guide

We understand that the automotive industry demands both high quantity and small quantity for repair market. Therefore, we offer High-Precision Stamping Dies for volume production and Flexible Mold for small quantity.

1. High-Precision Stamping Dies for Volume Production

Our engineer design our molds to handle the rigorous demands of automotive production and ensure them longevity and precision.

The Precision Stamping Dies we made:

1) Drawing/Forming Dies

These dies are developed from complex Class A surface data and demand exceptional precision.

Reasonable design to Optimize Material Flow Control – Through Design and simulation, we precisely regulate material movement to prevent cracking and wrinkling, even in deep-drawn panels.

High-strength and high-toughness mold materials – Our molds are engineered using premium mold materials such as SKD11, DC53, and tungsten carbide. This can ensure large-tonnage forming pressures with minimal deflection, ensuring dimensional stability over long production runs.

Excellent Surface – Designed specifically for visible body panels, our forming molds deliver superior surface quality free from defects.

2) Trimming and Piercing Dies

Designed for cutting excess material and making functional holes.

3D Trim Capability – Our three-dimensional cutting-edge designs handle complex trimming contours with precision.

Multi-Directional stamping design – Integrated Multi-Directional stamping systems enable efficient side piercing and trimming in a single press stroke, reducing mold cost.

3) Flanging and Reshaping Dies

The final shaping operation that determines the part geometry dimension.

Spring back Compensation designing – We use CAE simulation to predict spring back and make precise corrections in the molds, ensuring final parts meet tight tolerances.

Integrated Multi-Directional stamping designing – Directional stamping units to accomplish complex flanging and reshaping operations in a single station.

High-precision mold parts and “zero” clearance – As the final sizing operation, our molds deliver consistent part geometry.

2. Flexible Mold: Rapid Solutions for Auto Parts

We utilize Flexible Mold to produce small quantity. It’s very quick to manufacture complex automotive brackets, chassis components, and structural parts directly from CAD data. Reduce the long time for mold manufacturing and tooling cost.

Process Type	Best For	Volume	Tooling Cost	Lead Time
Drawing (Forming)	Complex shapes, deep cavities	100K+ pcs	High	6–10 weeks
Trimming & Piercing	Hole cutting, edge trimming	100K+ pcs	Medium	4–6 weeks
Flanging & Restriking	Edge forming, multi-directional bends	100K+ pcs	Medium	4–6 weeks

Our Workflow with PPAP Integration — Metal Stamping for Automotive Parts

PPAP (Production Part Approval Process) is a core quality gate in the automotive supply chain. For a metal stamping supplier, PPAP is not an extra step after delivery — it runs through the entire process from design to mass production.

Below is our workflow for automotive stamped parts.

Stage 1: R&D Support

PPAP Corresponding Element: Design Record Confirmation

While supporting customer R&D or creating and improving design files (UG, SolidWorks, ProE, AutoCAD, etc.), we simultaneously confirm the completeness and version consistency of the Design Record. This is the first of the 18 PPAP elements, requiring the supplier to hold the correct version-level drawings, assembly drawings, and material specifications.

Stage 2: Stamping Process — The Core PPAP Stage

PPAP Level 3 is the default submission level for automotive stamped parts. Level 3 requires submission of the PSW plus complete supporting data. The following PPAP core documents must be produced at this stage:

DFM Report → Design Confirmation

DFMEA (Design Failure Mode and Effects Analysis) is initiated during the die design stage (if the supplier holds design responsibility). The DFMEA must identify potential failure modes, effects, causes, and current controls, and calculate the Risk Priority Number (RPN).

Die Manufacturing → Sample Production

PPAP samples must come from a "significant production run" using production dies, presses, and operators. Samples must be individually labeled as "PPAP" and not mixed with regular parts.

PPAP Documents Required at This Stage

PPAP Document	Requirement
Process Flow Diagram (PFD)	Clearly describes each step and sequence from coil receiving to final inspection.
Process FMEA (PFMEA)	Identifies how stamping steps can fail, the effects, and causes; evaluates RPN; defines recommended actions.
Control Plan	Defines control methods, sample size/frequency, test equipment, and reaction plan for each stamped characteristic.
MSA (Measurement System Analysis)	Gage R&R studies for all critical characteristics to ensure measurement system variation is acceptable.
Dimensional Results	Full dimensional inspection records for each die station; PPAP samples must be traceable to the dimensional report.
Material/Performance Test Results	Material certificates and performance test reports (including lab name, date, and standard).
Springback & Formability Report	CAE simulation and actual measurement comparison for drawing and forming stations.

Key Acceptance Criteria: Initial process capability studies require Cpk ≥ 1.67 for critical dimensions. If Cpk falls between 1.33 and 1.67, customer review is required; below 1.33 requires 100% inspection or corrective action.

Stage 3: Sample Modification

After sample modification, PPAP must be resubmitted. Any die design change (station layout, punch/die clearance, bending radius, draw ratio) triggers PPAP resubmission. Modified samples require re-inspection, and the PFMEA and Control Plan must be updated accordingly.

Stage 4: Sample Delivery

PSW (Part Submission Warrant) is signed and submitted at this stage. The PSW is the summary document of PPAP. By signing the PSW, the supplier declares:

· All PPAP requirements have been met.

· Parts conform to drawing and specification requirements.

· Production was completed on the declared dies, press tonnage, and production line.

Stage 5: Final Delivery

PPAP approval is a prerequisite for mass production delivery. Formal shipments can only begin after the customer signs the PSW. Meanwhile, the Master Sample must be retained at the supplier as a reference standard for future visual and dimensional comparisons.

Our Stamping Process Flow with PPAP

DFM Design → Die Manufacturing (CNC / Wire EDM / EDM) → Die Assembly → Trial Run (T1) → Small-Batch Validation → PPAP Approval → Mass Production

1. DFM Design – Review drawings, part geometry, strip layout, stations, clearance, springback compensation.

2. Die Manufacturing – CNC, wire EDM, sinker EDM, grinding, heat treatment, coating, inspection.

3. Die Assembly – Assemble plates, punches, pilots, springs; set clearance and feed.

4. Trial Run (T1) – Mount die, run samples, check dimensions, springback, burr, surface; adjust.

5. Small-Batch Validation – 500–5,000 pcs; CPK/PPK studies, tool wear check, dimensional layout, material certification.

6. PPAP Approval – Submit PPAP documents: dimensional results, material certs, process flow, PFMEA, control plan, MSA, capability studies, sample parts. Obtain customer sign-off.

7. Mass Production – High-speed stamping, SPC, scheduled die maintenance, PPAP-compliant process control, packaging, shipment.

Why Choose Yixing Technology?

1. IATF 16949 Track Record
We are an IATF 16949-certified company with a proven track record in automotive stamping. We have successfully delivered a wide range of stamped parts — including body panels, structural reinforcements, bumper beams, chassis brackets, and various connectors — each fully traceable through our quality department.

2. Forming Simulation Before Die Start
We use AutoForm / CAE simulation software to analyze and optimize material flow, predict springback and deformation, and control wrinkle and crack risks before die manufacturing begins.

3. Precision Machining & Inspection Equipment
Our facility is equipped with state-of-the-art 5-axis high-speed milling machines and precision EDM equipment. Inspected with CMM and 3D scanning technologies, we fully control the manufacturing process, guaranteeing strict dimensional accuracy.

4. High-Quality Die Steel
By vacuum quenching and cryogenic treatment, we achieve high-strength, high-toughness, wear-resistant die steel. After high-grade mirror polishing, die components ensure long-term dimensional stability and extended die life.

5. Systematic Die Test & Validation
Comprehensive testing — including dimensional inspection, performance evaluation, and environmental simulations — ensures we meet our customers' PPAP requirements.

6. Deep Drawing & Multi-Process Expertise
We specialize in multi-station progressive and transfer dies, integrating drawing, trimming, piercing, flanging, and restriking into one die — delivering complex automotive parts with high efficiency and consistency.

With systematic engineering, strict quality control, and 20+ years' die experience, we provide automotive customers with high-reliability, long-life stamping solutions.