For automotive OEMs and Tier suppliers, finding a manufacturing partner that can handle the entire stamping lifecycle — from die design to mass production of sheet metal parts, inspection fixtures, and welding assemblies — is a strategic advantage. With over two decades of industry experience, Dian Stamping Company has built a facility and a team capable of managing complex automotive programs under one roof.

Why End-to-End Capability Matters in Automotive Stamping

In automotive manufacturing, the difference between a smooth production launch and costly delays often comes down to how well the tooling, parts, inspection, and assembly stages are coordinated. When a supplier handles only one piece of the puzzle — for example, designing dies without the ability to produce or validate stamped parts — the OEM bears the risk of misalignment between stages.

That is why more automotive buyers are turning to integrated manufacturers like stamping die manufacturers that offer a complete service chain: precision die design and fabrication, high-volume sheet metal stamping, custom checking fixtures, welding jigs, and final assembly. This integrated model reduces handoff errors, shortens lead times, and simplifies supplier management.

Who Is Dian Stamping?

Established in 2003 and headquartered in Linhai, Taizhou, Zhejiang Province, LINHAI DIAN MOULD CO., LTD (operating as Dian Stamping Company) is a specialized manufacturer of automotive stamping dies, stamped sheet metal parts, checking fixtures, welding jigs, welding assemblies, and assembly components. The company operates a modern 50,000 m² facility with a dedicated 4,000 m² die workshop and employs approximately 110 skilled professionals, including 35 die designers and technicians.

With a reported annual die turnover of approximately RMB 50 million and the capacity to produce about 2,000 sets of medium and small stamping dies per year, Dian Stamping serves a global customer base that includes KIA, BYD, Toyota, Honda, Suzuki, and Geely, with exports reaching more than 10 countries.

The Four Pillars of Dian Stamping's Service Model

Dian Stamping's offering is organized into four interconnected categories, each designed to support a specific stage of the automotive manufacturing cycle. Together, they form a seamless workflow from tooling development to finished, inspectable, and weldable components.

1. Stamping Dies — Precision Tooling for Complex Geometries

The core of any stamping operation is the die. Dian Stamping designs and manufactures progressive dies, transfer dies, and tandem/multi-station dies for large and medium-sized complex parts. The company's engineering team uses 3D CAD and forming simulation to optimize strip layout, springback compensation, and material utilization before any steel is cut.

Application areas covered include body-in-white components, door systems, seating systems, instrument panels, fuel-tank systems, exhaust systems, clutch systems, and chassis systems. The company processes a wide range of materials, including multiphase steel, aluminum, custom rolled and welded plate, and stainless steel. Typical delivery timelines are 30–40 days for steel stamping dies and approximately 70 days for casting stamping dies, subject to project-specific requirements.

2. Sheet Metal Parts — From Prototype to High-Volume Production

Beyond tooling, Dian Stamping offers full sheet metal fabrication services for both automotive and household appliance industries. The company produces stamped metal parts including brackets, panels, hinges, handles, structural reinforcements, and complex assemblies. Capabilities include progressive die stamping, transfer stamping, deep drawing, laser cutting, bending, and welding.

Customers can submit 2D drawings, 3D data, or physical samples for quotation, and prototype services are available before mass production ramp-up. Material options include stainless steel, aluminum, cold-rolled steel, galvanized steel, and high-strength steel grades.

3. Checking Fixtures — Quality Assurance Through Precision Gauging

A checking fixture is an essential tool for confirming that manufactured parts meet the specified dimensions. Dian Stamping designs and builds high-precision inspection fixtures aligned with GD&T standards, enabling rapid pass/fail assessment of stamped components and welded assemblies. These fixtures eliminate the individual measurement variation that can occur with manual tools like vernier calipers or micrometers, making them indispensable for production-line quality control.

Press dies and checking fixtures are always required as a set in automotive production. Dian Stamping's ability to supply both ensures that the tooling and the inspection method are designed in parallel, reducing the risk of measurement ambiguity and dimensional drift over the production run.

4. Welding Jigs and Assembly Fixtures

Accurate positioning during welding is critical for structural integrity and assembly fit. Dian Stamping manufactures custom welding jigs and fixtures designed to hold components in precise alignment during spot welding, MIG/TIG welding, and robotic welding operations. These fixtures support repeatable, high-quality production for automotive sub-assemblies and structural components.

Quality Management and Certifications

Dian Stamping's quality management system is ISO 9001 certified, and the company follows IATF 16949-oriented automotive manufacturing and quality practices. Quality control processes include in-line inspections, dimensional measurement using CMM equipment, and rigorous first-article validation for new die programs. The company also offers free metal samples for evaluation, with freight paid by the customer.

Why Automotive OEMs Choose Dian Stamping

When evaluating a manufacturing partner, automotive buyers look for more than just competitive pricing. The following factors set Dian Stamping apart from general-purpose stamping workshops:

• Factory-direct pricing — Dian Stamping is a factory, not a trading company, which means customers avoid intermediary markups and benefit from direct communication with the production team.
• Two decades of automotive experience — Since 2003, the company has accumulated deep domain knowledge in automotive die design and sheet metal forming, serving major OEMs including KIA, BYD, Toyota, Honda, Suzuki, and Geely.
• One-stop manufacturing — From die design to stamped parts, checking fixtures, and welding jigs, Dian Stamping eliminates the need to coordinate multiple vendors across the tooling and production cycle.
• Scalable capacity — With a 50,000 m² facility, a planned 35,000 m² expansion featuring new press and coating lines, and an annual die output of 2,000 sets, the company is equipped for both prototype development and high-volume production.
• Customization flexibility — Parts can be developed from 2D drawings, 3D data, or physical samples, with prototype services available before mass production.

The Future: Expanded Capacity and New Technology

Dian Stamping is currently investing in a new 35,000 m² facility that will feature additional press lines and advanced coating capabilities. This expansion will increase the company's production capacity for both stamping dies and sheet metal parts, while also enabling new surface treatment processes that enhance tool life and part quality.

For automotive buyers planning new vehicle programs or looking to optimize their existing supply chain, this expansion means greater production reliability, shorter lead times, and access to a broader range of manufacturing capabilities — all from a single, trusted partner.