Sourcing automotive tooling from multiple suppliers creates friction: misaligned tolerances between the die shop and the stamping facility, delays when the inspection fixture arrives weeks after production has started, and quality disputes with no single party accountable. These pain points erode margins and lengthen time-to-market. A growing number of procurement managers are consolidating their supply base around manufacturers that can deliver automotive stamping dies, production parts, checking fixtures, and welding jigs as an integrated package. DIAN STAMPING — LINHAI DIAN MOULD CO., LTD — has spent over two decades building exactly that capability from its facility in Zhejiang, China.

Founded in 2003 and headquartered in Taizhou, Zhejiang Province, DIAN STAMPING operates a modern 50,000 m² manufacturing campus with a dedicated 4,000 m² die workshop. The company employs approximately 110 people, including around 35 die designers and technicians, and produces roughly 2,000 sets of medium and small stamping dies per year. With an annual die turnover approaching RMB 50 million, DIAN has grown into a recognized name among progressive die stamping specialists serving the global automotive supply chain.

The company's client list includes OEMs such as KIA, BYD, Toyota, Honda, Suzuki, and Geely — names that demand rigorous quality standards and consistent on-time delivery. DIAN also exports tooling and parts to more than 10 countries, giving international buyers confidence that the team understands export documentation, packaging standards, and overseas communication protocols.

At the heart of DIAN's operation is die engineering. The company designs and builds progressive dies, transfer dies, and tandem (multi-station) dies for large and medium-sized complex parts. Tool steels are selected according to part geometry, production volume, and material type — whether the blank is high-strength steel, aluminum alloy, tailored welded blank, or stainless steel.

Application coverage spans nearly every vehicle system: body-in-white (BIW) panels such as rear outer panels, side frames, and spare tire wells; door system components including hinge reinforcement plates and water-cut panels; seating system structures like chassis seats, seat basins, and support beams; instrument panel stampings; heat shields for exhaust systems; and structural floor and frame members. This breadth means a single project can often consolidate multiple die sets under one purchase order.

Unlike die-only shops that hand off tooling and walk away, DIAN STAMPING operates its own press and fabrication lines. As a sheet metal part manufacturer, the company can run production volumes of the parts it tools — closing the loop between die tryout and serial production. This integration shortens the feedback cycle when part quality issues arise and gives the customer a single point of contact for both tooling and components.

Beyond automotive, DIAN also serves the household appliance sector with stamped brackets, panels, hinges, handles, evaporator panels, and structural refrigerator components. Material options include stainless steel, aluminum, cold-rolled steel, and galvanized steel. Secondary operations — deburring, bending, welding, laser cutting, and coating — are handled in-house, reducing the number of external processing steps.

Every stamped part needs to be measured, and a checking fixture is the tool that makes high-throughput inspection possible. DIAN designs and fabricates GD&T-oriented checking fixtures that allow operators to quickly verify dimensional conformance of stamped components and welded assemblies — without relying on slow, operator-dependent hand tools like vernier calipers or micrometers on complex geometries.

Because DIAN builds the die and the checking fixture in the same facility, the two tools are developed in parallel. The fixture references the same CAD data and tolerance stack-up as the die design, eliminating the mismatch that can occur when die and fixture come from separate suppliers. For production managers, this translates to faster buy-off and fewer measurement disputes at PPAP.

Assembly accuracy begins with fixturing. DIAN produces custom welding jig manufacturer solutions for positioning, clamping, and welding stamped components into sub-assemblies and finished assemblies. Whether the application is a chassis member, an exhaust system bracket, a seat frame, or a BIW structure, the jig ensures that every weldment comes out dimensionally repeatable.

The welding jig design team works from the same 3D data and assembly sequence that the die designers use, so datum points and locating strategies remain consistent from stamping through welding. This continuity reduces rework and simplifies root-cause analysis when dimensional issues need to be traced.

DIAN STAMPING operates under an ISO 9001-certified quality management system and follows IATF 16949-oriented practices throughout its automotive projects. The company identifies itself as a factory — not a trading company — which means buyers communicate directly with the engineering and production teams rather than through an intermediary.

Customization starts from 2D drawings, 3D CAD data (STEP, IGES, or native formats), or physical samples. Prototype services are available for programs still in the development phase. Typical delivery is 30–40 days for steel stamping dies and approximately 70 days for casting stamping dies, subject to project scope. Free metal samples may be provided for evaluation, with freight at the customer's expense.