In the fast-paced world of automotive manufacturing, precision and reliability are non-negotiable. Every component — from the body panels that define a vehicle's silhouette to the structural reinforcements that ensure passenger safety — depends on high-quality tooling and expert metal forming. That is why choosing the right partner for automotive stamping dies and sheet metal parts is one of the most critical decisions an OEM or Tier supplier can make.

With over two decades of hands-on experience, LINHAI DIAN MOULD CO., LTD (DIAN STAMPING) has established itself as a reliable, factory-direct manufacturer of stamping tooling, stamped components, checking fixtures, and welding jigs. Headquartered in Huangyan, Taizhou, Zhejiang Province — one of China's most active manufacturing hubs — the company serves global automotive brands including KIA, BYD, Toyota, Honda, Suzuki, and Geely, and exports to more than 10 countries worldwide.

More Than 20 Years of Die and Stamping Excellence

Founded in 2003, DIAN STAMPING has grown from a specialized tooling workshop into a comprehensive manufacturing facility covering approximately 50,000 m², including a dedicated die workshop of about 4,000 m². The company employs around 110 skilled professionals, of whom roughly 35 are die designers and technicians. This depth of engineering talent allows DIAN to handle complex projects from concept to production with confidence.

With an annual capacity of approximately 2,000 sets of medium and small stamping dies and an annual die turnover of around RMB 50 million, the company operates at a scale that ensures both competitive pricing and consistent delivery. A planned 35,000 m² expansion featuring new press lines and coating facilities will further extend its capabilities in the near future.

Comprehensive Product Portfolio for Automotive Manufacturing

DIAN STAMPING offers a full spectrum of tooling and metal parts under one roof, eliminating the complexity of managing multiple suppliers. The company's product lineup covers four core areas:

1. Stamping Dies

As experienced stamping die manufacturers, DIAN produces precision progressive dies, transfer dies, and tandem/multi-station dies for large and medium-sized complex automotive parts. These dies are engineered for high-volume production runs with tight dimensional tolerances, supporting materials ranging from multiphase steel and aluminum to custom rolled and welded plate and stainless steel. Application areas include body-in-white, door systems, seating systems, instrument panels, fuel-tank systems, exhaust systems, clutch systems, and chassis systems.

2. Sheet Metal Parts

Beyond tooling, DIAN manufactures custom stamped sheet metal parts for both automotive and household appliance industries. Capabilities include progressive die stamping, deep drawing, bending, laser cutting, welding, and assembly. The company supports customers from prototype development through high-volume production, with material options that include cold-rolled steel, galvanized steel, stainless steel, and aluminum alloys.

3. Checking Fixtures

A checking fixture is essential for quality assurance in stamping production. DIAN designs and builds high-precision inspection fixtures guided by GD&T principles, enabling rapid, repeatable verification of stamped components and welded assemblies. These fixtures eliminate measurement variability and ensure that every part meets OEM specifications before it moves to the next stage of production.

4. Welding Jigs

Custom welding jigs and fixtures from DIAN provide accurate positioning and repeatable alignment for automotive welding operations. Whether for body-in-white assembly, subframe welding, or exhaust system fabrication, these jigs help manufacturers achieve consistent weld quality and dimensional accuracy in high-volume environments.

Quality Systems and Manufacturing Standards

DIAN STAMPING operates under a quality management system aligned with ISO 9001 standards, and the company's practices reflect IATF 16949-oriented automotive manufacturing principles. Rigorous in-process inspections, combined with final validation using checking fixtures and CMM equipment, ensure that every die and stamped part delivers consistent quality.

The company's commitment to quality extends to its material selection and processing capabilities. DIAN works with advanced high-strength steels, aluminum alloys, and other specialty materials, applying techniques such as progressive die stamping, transfer stamping, and fine blanking to achieve the required mechanical properties and surface finish.

Why Global Automotive Brands Choose DIAN STAMPING

• Factory-Direct Pricing: As a manufacturing facility rather than a trading company, DIAN offers competitive pricing without middleman markups — a significant advantage for volume-driven automotive programs.
• End-to-End Capability: From die design and fabrication to stamping production, inspection fixturing, and welding jigs, DIAN provides a true one-stop solution that streamlines supply chain management.
• Proven OEM Track Record: With customers including KIA, BYD, Toyota, Honda, Suzuki, and Geely, DIAN has demonstrated its ability to meet the stringent quality and delivery requirements of global automotive brands.
• Experienced Engineering Team: A dedicated team of 35 die designers and technicians brings deep expertise in progressive die design, transfer die engineering, and process optimization.
• Global Export Experience: DIAN exports to more than 10 countries, with established logistics and shipping procedures that ensure reliable delivery worldwide.
• Material Versatility: The company processes multiphase steel, aluminum, stainless steel, custom-rolled plate, and more, covering a wide range of automotive material specifications.

The DIAN Advantage: A Partner, Not Just a Supplier

In an industry where tooling quality directly impacts production uptime, part quality, and overall vehicle cost, DIAN STAMPING positions itself as a long-term manufacturing partner. The company's combination of scale, experience, and comprehensive service offering makes it a compelling choice for automotive OEMs and Tier suppliers looking to optimize their stamping die and sheet metal part supply chain.

Whether you are launching a new vehicle program, seeking cost reduction on existing stamping dies, or looking for a reliable source of custom sheet metal parts and checking fixtures, DIAN STAMPING has the engineering capability and manufacturing capacity to deliver.