Every stamped metal component that goes into a vehicle has to meet tight tolerances — and the manufacturer behind that component matters. Automotive OEMs and Tier-1 suppliers routinely evaluate potential partners on engineering capability, production scale, quality systems, and delivery reliability. Dian Stamping (LINHAI DIAN MOULD CO., LTD) has been earning that trust for more than 20 years, serving global automotive brands including KIA, BYD, Toyota, Honda, Suzuki, and Geely.

Headquartered in Huangyan, Taizhou, Zhejiang Province — one of China's most established manufacturing hubs — Dian Stamping operates a modern facility spanning approximately 50,000 m². With a workforce of around 110 skilled professionals, including 35 die designers and technicians, the company has built a reputation for delivering precision automotive stamping dies and stamped components that meet the highest industry standards.

A Vertically Integrated One-Stop Manufacturing Partner

What sets Dian Stamping apart from many other stamping companies is its vertically integrated production model. Instead of outsourcing portions of the job to subcontractors, the company keeps every stage under its own roof — tool and die design, die manufacturing, stamping, welding, assembly, and quality inspection. Customers benefit from shorter lead times, tighter quality control, and pricing that reflects factory-direct efficiency rather than a stacked supply chain.

The company's core offerings span four main product categories, each critical to the automotive supply chain:

• Stamping Dies — Including progressive die stamping, transfer dies, and tandem dies for large and medium-sized complex parts.
• Sheet Metal Parts — Custom stamped components for automotive body-in-white, door systems, seating systems, chassis, and more.
• Checking Fixtures — High-precision, GD&T-compliant inspection fixtures designed to verify dimensional accuracy of stamped parts.
• Welding Jigs & Assembly Fixtures — Custom-engineered welding fixtures for robotic MIG welding, spot welding, and manual assembly operations.

Progressive Die Stamping: Precision at High Volume

For automotive manufacturers requiring high-volume production of complex metal parts, progressive die stamping is often the method of choice. In a progressive die, a coil of sheet metal is fed through a series of stations, each performing a distinct operation — blanking, forming, punching, coining, and cutoff — all in a single pass through the press. The result is a finished part that emerges at the end of the die, fully formed and ready for downstream assembly or finishing.

Dian Stamping has extensive experience designing and building progressive dies for a wide range of automotive applications. The company's die design team uses advanced CAD/CAM software including AutoCAD, SolidWorks, and CATIA to optimize die structures for maximum tool life, minimal downtime, and consistent part quality. With an annual production capacity of approximately 2,000 sets of medium and small stamping dies, Dian Stamping is well-equipped to handle both prototype development and mass production runs.

Material Versatility: From Multiphase Steel to Aluminum

Modern automotive design increasingly demands lightweight yet strong materials. Dian Stamping has invested in the capability to process a diverse range of materials, including multiphase steel (advanced high-strength steel), aluminum, custom rolled and welded plate, and stainless steel. This material versatility allows the company to serve a wide spectrum of automotive applications — from structural body components that require high strength-to-weight ratios, to exhaust and fuel system parts that demand corrosion resistance.

The company's in-house secondary operations further enhance the value it delivers. Laser cutting, bending, welding, and powder coating are all performed on-site, eliminating the need for multiple suppliers and reducing logistics complexity. For customers seeking a sheet metal parts supplier that can manage the entire production chain under one roof, this single-source capability is a significant advantage.

Checking Fixtures: Ensuring GD&T Compliance

Quality assurance in automotive stamping goes far beyond visual inspection. Every stamped component must meet strict geometric dimensioning and tolerancing (GD&T) requirements to ensure proper fit and function in the final assembly. This is where checking fixture technology plays a critical role. A checking fixture is a custom-engineered inspection tool that allows rapid, repeatable dimensional verification of stamped parts against the original CAD data.

Dian Stamping designs and manufactures high-precision checking fixtures that are delivered as a matched set with the corresponding press dies. This integrated approach — where the die and checking fixture are designed together — ensures that any dimensional variation in the stamped part is immediately detectable during production. The result is faster quality feedback loops, reduced scrap rates, and greater confidence in production output. The company's checking fixtures are widely used in body-in-white, door systems, seating systems, and chassis applications.

Welding Jigs: Precision in Assembly

After stamping, many automotive components require welding and assembly operations. Consistent weld quality depends on precise part positioning, which is why welding jig design and fabrication are integral to the manufacturing process. Dian Stamping provides custom welding jigs and fixtures engineered for robotic MIG welding, spot welding, and manual welding techniques. Each jig is designed to hold components in exact alignment, ensuring repeatable weld geometry across production runs.

The company's welding jig capabilities support a wide range of automotive systems, including chassis components, exhaust systems, seat frames, and instrument panel structures. By offering stamping dies, checking fixtures, and welding jigs as a coordinated package, Dian Stamping helps customers reduce the number of suppliers they need to manage, streamline their tooling procurement, and accelerate time-to-market.

Quality Systems and Certifications

Dian Stamping operates under a quality management system aligned with ISO 9001 standards, and follows IATF 16949-oriented automotive manufacturing practices. The company's commitment to quality is reflected in its long-standing relationships with major OEMs — relationships that are built on consistent delivery of defect-free parts, on-time shipments, and responsive technical support.

Why Global Automakers Trust Dian Stamping

Dian Stamping has built long-term relationships with major automotive brands by consistently delivering on three fronts: precision, reliability, and cost control. Here is how the company delivers value to its customers:

• Factory-Direct Pricing: As a manufacturer rather than a trading company, Dian Stamping offers competitive pricing without intermediary markups.
• End-to-End Capability: From die design and stamping to welding, inspection, and assembly — all under one roof.
• Customization: Parts can be developed from 2D drawings, 3D CAD data, or physical samples. Prototype services are available.
• Fast Lead Times: Typical delivery is 30–40 days for steel stamping dies and approximately 70 days for casting dies, depending on project scope.
• Global Experience: Serving customers in more than 10 countries with English-language support and international logistics capability.

Conclusion: Partner with a Proven Stamping Die Manufacturer

Choosing the right automotive stamping dies partner is a strategic decision that affects product quality, production efficiency, and overall supply chain performance. With 20+ years of industry experience, a 50,000 m² manufacturing facility, ISO 9001-aligned quality systems, and a team of 35+ die engineers, Dian Stamping offers the technical depth and production capacity that global automotive OEMs demand.

Whether you need progressive dies for high-volume stamping, custom sheet metal parts for a new vehicle program, precision checking fixtures for quality assurance, or welding jigs for production assembly, Dian Stamping has the expertise and infrastructure to deliver.