1. Cost accounting
- Material cost: Calculate the amount by plate type (304 stainless steel, SPCC cold-rolled steel, etc.), thickness, and unfolded area, plus loss rate (usually 5-10%).
- Processing fee: Calculate the cost of cutting (laser/plasma), bending (bending machine labor sharing), welding (argon arc welding/spot welding) and other processes.
- Additional costs: mold development (such as custom stamping molds), surface treatment outsourcing (such as galvanizing), transportation and taxes.
2. Quotation plan
- Provide a tiered quotation (such as 100 pieces vs. 1000 pieces per unit price), indicate the payment method (30% advance payment + final payment), delivery cycle.
- Include quality commitment (such as compliance with GB/T 1804-M grade accuracy standards).
3. Signing a contract
- Clarify the technical agreement (with drawings), liability for breach of contract (penalty for delayed delivery), acceptance criteria (such as IP protection level), and intellectual property ownership.

1. Technology transfer
- Use AutoCAD/SolidWorks to unfold sheet metal parts, optimize layout and reduce waste (nested software assistance).
- Generate CNC code (laser cutting path), bending sequence simulation, and avoid interference.
2. Process review
- Determine the processing route (such as: laser cutting → deburring → bending → welding → spraying).
- Select equipment (such as fiber laser machine vs. CO2 laser machine), tooling fixture design.
3. Customer confirmation
- Submit 3D model/sample for customer signature, and record the technology freeze document signed by both parties.

1. Raw material procurement
- Purchase standard plates (such as Baosteel SGCC coils) according to the order, and check the material report (MTC certificate).
2. Processing stage
- Cutting: laser cutting (pay attention to heat affected zone control) or CNC punch processing.
- Forming: bending machine with special tools (R angle mold) to control springback compensation.
- Connection: grind the weld after welding, or use rivets and bolts to assemble.
- Surface treatment: outsourcing powder spraying (RAL color card number) or electrolytic polishing.
3. Full process quality inspection
- First piece inspection: first piece three-coordinate measurement (full inspection of key dimensions).
- Patrol inspection: random inspection of bending angle (angle ruler), aperture (plug gauge).
- Final inspection: full size report, salt spray test (48 hours), packaging protection inspection.

1. Packaging and transportation
- Anti-scratch treatment (PEF separation), wooden box reinforcement (export standard), select logistics method (land transportation/sea transportation LCL).
2. Acceptance and settlement
- Customers sign for the goods upon arrival, feedback on quality issues within 7 days, and pay the balance according to the contract.
3. After-sales support
- Provide technical guidance (installation and commissioning), lifelong maintenance services for non-standard parts, collect feedback and optimize subsequent cooperation.