Seat Frame Stamped Parts

At 1099 mm, the part spans enough distance that a small change at one location can become significant when compared with a feature near the opposite end.

That is why we do not evaluate this type of seat component only by checking a few local dimensions independently. Hole locations, formed sections and assembly faces need to maintain the relationship defined by the released drawing.

A part can look acceptable around one end and still create difficulty when placed into the next welding or seat-assembly fixture because the complete profile has shifted.

For Changdong, full-length geometry is therefore part of production control rather than something checked only when a final assembly problem appears.

The five-die route allows the component to change progressively rather than trying to complete all geometry in one or two heavy operations.

We do not assign generic functions such as piercing, forming or calibration to a stage unless they are confirmed by the released process data. What matters for the stamped-part supply is that each die leaves the component in the correct physical condition for the next step.

Separate tools also give the toolmaking team direct access to individual stages when maintenance or adjustment is required, without disturbing unrelated tooling.

Because five separate dies are used, the workpiece leaves the press and is handled between operations several times before becoming a finished component.

Those transfers are part of the manufacturing process. A long sheet-metal part can be scratched by poor stacking, bent by unsupported lifting or marked by repeated contact even when the stamping dies themselves are producing the correct geometry.

Changdong therefore pays attention to handling surfaces, temporary storage and how the semi-finished component is supported between presses.

This is particularly relevant for coated material, where unnecessary tool pickup or handling marks should not be introduced after an area has already reached an acceptable condition.

Once the component leaves the fifth die, the acceptance focus moves completely to the finished part.

The question is no longer whether one individual operation appears successful. The complete component needs to match the drawing condition required by the downstream seat structure.

For these Seat Frame Stamped Parts, we pay particular attention to the relationship between distant features along the part, rather than allowing each section to be approved independently without considering the complete geometry.

Changdong designs and manufactures stamping dies rather than relying only on externally supplied production tooling.

When a production part shows a change that is traced back to the tool, the relevant die can return directly to our engineering and toolmaking team. The actual stamped sample remains available during that review.

Our Dongguan operation includes 13 die design engineers, CNC machining, a 3-meter gantry CNC, six WEDM machines, EDM, grinding, drilling, fitting and press tryout capability.

For the customer, the practical benefit is that stamped-part production and the five tooling assets behind it are supported within the same manufacturing operation.

After the five-stage route has produced an approved component, that result becomes the production reference for later batches.

If one die is serviced between orders, Changdong can inspect first-off parts against the established result before regular quantity is released again.

Production history, tooling maintenance and approved-part condition therefore stay connected instead of being rebuilt independently for every order.

This supports ongoing Seat Frame Stamped Parts supply from a known tooling and manufacturing condition.