{"id":2318,"date":"2026-07-04T17:04:23","date_gmt":"2026-07-04T09:04:23","guid":{"rendered":"https:\/\/metalstampingparts.ltd\/?page_id=2318"},"modified":"2026-07-04T17:04:23","modified_gmt":"2026-07-04T09:04:23","slug":"stamped-parts-cosmetic-functional-defect-boundary-guide","status":"publish","type":"page","link":"https:\/\/metalstampingparts.ltd\/ceb\/stamped-parts-cosmetic-functional-defect-boundary-guide\/","title":{"rendered":"Stamped Mga Bahin Cosmetic vs Functional Defect Boundary Giya"},"content":{"rendered":"

Short answer:<\/strong> Cosmetic and functional defect boundaries should be defined before quoting giporma nga mga piyesa because the same scratch, burr, stain, dent, or tool mark can be harmless in one zone and rejectable in another. The RFQ should mark functional surfaces, visible surfaces, hidden surfaces, safety edges, plating zones, sample standards, packaging risk, and escalation rules.<\/p>\n

A defect name alone does not tell a tagasuplay whether a part can ship. A burr on a hidden edge may be acceptable, while the same burr on a kontak edge can damage an assembly. A faint tool mark may be normal inside a bracket, but unacceptable on a visible appliance face. The boundary needs to be written before price and inspection are compared.<\/p>\n

Use this page with the surface finish cosmetic inspection guide<\/a>, burr control guide<\/a>, deburring and edge break guide<\/a>, and plating defect acceptance guide<\/a>.<\/p>\n

Defect boundary decisions<\/h2>\n\n\n\n\n\n\n\n\n
Boundary<\/th>\nWhy it matters<\/th>\nRFQ evidence<\/th>\n<\/tr>\n<\/thead>\n
Functional zone<\/td>\nSmall defects can affect fit, sealing, kontak, force, or safety.<\/td>\nMarked surfaces, CTQ features, test method, and zero-defect rule if needed.<\/td>\n<\/tr>\n
Cosmetic zone<\/td>\nVisible surfaces need viewing conditions and sample standards.<\/td>\nSurface class, lighting, distance, photos, and limit samples.<\/td>\n<\/tr>\n
Hidden zone<\/td>\nOver-control can add cost without improving function.<\/td>\nAllowed tool marks, handling marks, burr limits, and packaging rule.<\/td>\n<\/tr>\n
Packaging kontak<\/td>\nGood parts can be damaged after inspection.<\/td>\nTray, separator, bag, carton, rub risk, and final appearance check.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Classify the defect by risk, not by name<\/h2>\n

Scratches, stains, dents, burrs, witness marks, oil marks, plating color variation, edge exposure, and tooling marks are not all equal. The question is where the condition appears and what it can affect. Buyers should mark surfaces as functional, cosmetic, safety, hidden, or non-critical instead of treating the whole part as one zone.<\/p>\n

Functional surfaces may include kontak pads, sealing faces, datum pads, spring beams, solder areas, grounding points, sliding faces, threaded hardware seats, and edges touched by operators. Cosmetic surfaces may need lighting and viewing distance rules. Hidden surfaces often need practical workmanship limits, not premium appearance standards.<\/p>\n

Use samples where words are weak<\/h2>\n

Terms like slight, minor, visible, clean, or acceptable are hard to enforce. Use photos, a golden sample, a limit sample, and a reject sample when judgment is involved. If the condition changes under lighting, specify the viewing angle and distance. If the condition affects a kontak or seal, add a functional test rather than relying only on a visual check.<\/p>\n

Packaging can move a condition from acceptable to rejectable. A formed tab that leaves production straight can arrive bent in bulk packing. A plated surface can leave production clean and arrive scratched from part-to-part rubbing. Connect defect boundaries to the packaging and shipping guide<\/a> and the packaging damage claim guide<\/a> when appearance or formed features matter.<\/p>\n

RFQ details to include<\/h2>\n