In the competitive world of automotive manufacturing, the quality of your precision sheet metal fabrication parts can make or break your production line. Whether you are an OEM launching a new vehicle platform or a Tier-1 supplier scaling up component output, choosing the right fabrication partner is critical to cost, quality, and delivery performance.

More Than Two Decades of Expertise

Founded in 2003 and headquartered in Linhai, Taizhou, Zhejiang Province, LINHAI DIAN MOULD CO., LTD — operating as DIAN STAMPING — has built a reputation as a reliable, factory-direct manufacturer of automotive stamping dies, stamped sheet-metal parts, checking fixtures, welding jigs, and assembly components. With over 20 years of industry experience, the company has served well-known automotive brands including KIA, BYD, Toyota, Honda, Suzuki, and Geely, and exports to more than 10 countries across the globe.

A Manufacturing Facility Built for Scale

DIAN STAMPING operates a modern facility spanning approximately 50,000 m², with a dedicated die workshop of around 4,000 m². The company employs approximately 110 skilled professionals, including roughly 35 die designers and technicians. This infrastructure supports an impressive annual capacity of about 2,000 sets of medium and small stamping dies, with an annual die turnover of approximately RMB 50 million.

A planned 35,000 m² expansion featuring new press and coating lines will further strengthen DIAN's manufacturing capabilities, enabling even greater throughput and surface-treatment quality for customers worldwide.

Comprehensive Product Portfolio

DIAN STAMPING's product offering spans four core categories, each designed to serve specific stages of the automotive manufacturing value chain:

1. Stamping Dies

Precision progressive, transfer, and tandem stamping tooling for complex automotive and industrial parts. From body-in-white panels to seating system components, stamping die manufacturers like DIAN deliver tooling that ensures tight tolerances, long die life, and consistent stamping quality across high-volume production runs.

2. Sheet Metal Parts

Automotive and household-appliance stamping, custom metal parts, and welding assemblies. DIAN's sheet metal fabrication capabilities cover everything from brackets and panels to complex structural components, with material options including high-strength steel, aluminum, cold-rolled steel, and galvanized steel.

3. Checking Fixtures

High-precision, GD&T-oriented inspection fixtures designed to verify dimensional accuracy of stamped components and assemblies. Checking fixtures eliminate measurement subjectivity and enable rapid, repeatable quality checks on the production floor.

4. Welding Jigs

Custom welding fixtures for accurate, repeatable positioning during welding operations. These jigs support body-in-white assembly, chassis welding, and various sub-assembly processes, ensuring consistent weld quality and dimensional control.

Quality Systems and Certifications

DIAN STAMPING operates under an ISO 9001 quality management system and follows IATF 16949-oriented automotive manufacturing practices. This commitment to quality is reflected in every stage of production — from die design and material selection through stamping, inspection, and final delivery.

The company welcomes customization from 2D drawings, 3D data, or physical samples, and offers prototype services to validate designs before full-scale production. Typical delivery timelines are 30–40 days for steel stamping dies and approximately 70 days for casting stamping dies, subject to project requirements.

Application Areas Across the Vehicle

DIAN's products are used across a wide range of automotive systems, including:

• Body-in-white (BIW) — door panels, fenders, side frames, spare tire wells
• Door systems — hinge reinforcement plates, water-cut panels, guides
• Seating systems — seat basins, support beams, battery cases, floor panels
• Instrument panels — dashboard support structures and brackets
• Fuel-tank, exhaust, and clutch systems — heat shields, brackets, and formed components
• Chassis systems — swing arms, control arms, and frame components

Why Choose DIAN STAMPING?

In an industry where precision and reliability are non-negotiable, DIAN STAMPING differentiates itself through several key advantages:

Factory-Direct Pricing: As a manufacturer rather than a trading company, DIAN offers competitive pricing without intermediary markups — a critical advantage for cost-sensitive automotive programs.

End-to-End Capability: From tool and die manufacturing to stamping, welding, assembly, checking fixtures, and welding jigs, DIAN provides a vertically integrated solution that simplifies supply chain management for its customers.

Global OEM Trust: Having served manufacturers like KIA, BYD, Toyota, Honda, Suzuki, and Geely, DIAN has demonstrated its ability to meet the rigorous quality and delivery standards demanded by global automotive brands.

Material Versatility: DIAN's expertise spans multiphase steel, aluminum alloys, custom rolled and welded plate, and stainless steel, enabling the right material selection for each application.

Export Experience: With exports to more than 10 countries, DIAN has established logistics and communication processes that make international collaboration smooth and reliable.

A Partnership Built on Precision

Choosing a precision sheet metal fabrication parts supplier is not just about unit price — it is about finding a partner who understands the interplay between die design, material behavior, stamping parameters, and quality control. DIAN STAMPING brings two decades of hands-on experience, a modern manufacturing footprint, and a proven track record with global OEMs.

Whether you need a single progressive die for a new product launch or a high-volume stamping program spanning multiple vehicle platforms, DIAN STAMPING has the engineering talent, production capacity, and quality systems to deliver.