From RFQ to Repeat Production

01 · RFQ and requirement review

Send the available 2D drawing, 3D model, material specification, quantities and critical requirements. Customers do not need to select a manufacturing process before contacting Tianluping; the first review identifies likely routes and missing information.

Useful starting inputs

• Part drawing and available 3D data
• Material grade or alloy and governing standard
• Order quantity, annual forecast and delivery expectations
• Critical dimensions, datums and machined features
• Heat treatment, finish, inspection and documentation requirements

02 · Manufacturing-route review

Engineering reviews process fit, geometry, wall transitions, material, tooling, machining, finishing and verification requirements. Open technical and commercial assumptions are identified before the quotation is treated as complete.

Investment casting or die casting

Investment casting is considered for complex stainless or carbon steel geometry and near-net-shape opportunities. Die casting is considered for repeat aluminum or zinc components where alloy, projected area, geometry and volume support dedicated tooling.

03 · Quotation and scope alignment

The quotation should state the part revision, material, quantity basis, tooling, included secondary operations, inspection scope, documentation, packaging and commercial assumptions. Unresolved requirements remain open questions rather than implied commitments.

Change control

Drawing revisions, material changes, quantity changes and added inspection requirements can affect tooling, process, price and timing. Changes should be reviewed and approved before implementation.

04 · Tooling and sampling

After scope approval, tooling and process preparation begin. Samples are checked against the agreed drawing and sample plan. Tool ownership, maintenance responsibility, revision status and sample-approval evidence are recorded as required.

Sample approval

Sample approval confirms the agreed release condition; it does not remove the need for production controls. Deviations, conditions and remaining actions should be documented before repeat production.

05 · Production and process control

Production follows the released material, tooling, process and inspection plan. Incoming, in-process and final controls are applied at the points defined for the project.

Secondary operations

CNC machining, heat treatment, cleaning, finishing and other agreed operations are controlled as part of the complete route, including datum transfer and inspection after critical operations.

06 · Final inspection and delivery

Final inspection confirms the agreed characteristics and records before packaging and shipment. Material reports, dimensional reports, FAI, PPAP, traceability, labels and packaging are supplied when included in the order scope.

After delivery

Questions or nonconformances should reference the purchase order, part number, revision, lot and supporting evidence so containment and corrective-action review can begin efficiently.

Project files and confidentiality

Customer drawings and restricted project files are used for manufacturing review and project execution. Customers may request NDA discussion before sharing restricted information. Public case studies use only approved, anonymized or independently created visuals and do not disclose customer identity without authorization.