A line should not treat every non-passing reading the same way. A part may have a setup issue, a measurement alarm, a correctable geometry condition, a no-progress response, a suspected material issue or a confirmed nonconformance. Without distinct routes, repeated correction can conceal a measurement problem, damage the part, mix lots or create an untraceable quality decision.
This article is a quality-routing framework. It does not claim that StraighteningTech currently supplies automatic sorting, specific sensors, rejection thresholds, traceability software or authorized rework rules. Those functions require verified local scope and quality approval.
*Illustrazione del concetto di ingegneria. It shows a candidate production cell, not an installed automatic sorting system or a defined defect-detection capability.*
Define the Disposition States
Al minimo, distinguish PASS, NOK, idoneo alla rilavorazione, stop/hold and engineering/quality review. The definitions must reference the controlled drawing, metodo di misurazione, process condition and authority to release. A process alarm is not automatically a reject; it may be an escalation signal that requires verification.
| Stato | Definizione richiesta |
|---|---|
| PASS | Meets the agreed released-state requirement with required records |
| NOK | Does not meet the defined requirement or has a confirmed nonconformance |
| Rework-eligible | Meets documented conditions for another approved attempt |
| Stop / hold | Requires setup, process-signal, quality or engineering review before further processing |
| Engineering review | Needs a controlled decision outside the normal automatic route |
Keep Setup Issues Separate From Part Nonconformance
Before routing a part as NOK, consider whether the signal could result from datum seating, fixture variation, condizione del sensore, part identity, wrong recipe or an unapproved support state. The procedure should define the allowed clean/reseat/repeat checks and prevent unlimited retries.
*Illustrazione del concetto di ingegneria. It depicts a measurement decision point, not proof of an automatic classification or a specific alarm rule.*
Vedere ripetibilità dell'attrezzatura e posizionamento dei datum E crack detection during automatic straightening for the separation between a signal and its verified cause.
Set a Rework Limit Before the First Correction
Rework should be an approved route with a defined maximum number of attempts, permitted contact/support conditions, remeasurement requirement, surface/feature checks and authority to continue or stop. The limit is not a universal number; it depends on material, fase del processo, feature risk, customer requirements and validated response. When a part does not respond as expected, the appropriate action may be hold or reject rather than additional force.
Maintain Isolation and Traceability
Each disposition must preserve part/lot identity, drawing/recipe version, measurement condition, correction attempts, result, operator/automation event, tempo, review decision and physical location. Isolation must prevent a held or NOK part from returning to the PASS flow without explicit authorization.
*Illustrazione del concetto di ingegneria. It emphasizes released-state verification and recorded disposition, not a promise of a DMC/MES interface or automatic sorter.*
Build a Verification and Escalation Route
- identify the part, lot, drawing and recipe;
- verify the measurement/datum setup within the approved checks;
- capture the reading, process state and any alert;
- apply only the allowed rework route when eligibility is confirmed;
- release and remeasure under the agreed condition;
- route PASS, NOK, hold or engineering review;
- retain traceability and physical segregation;
- use recurring patterns to trigger process or quality review.
For the needed evidence architecture, Vedere prova e accettazione del campione di raddrizzatura E Gage R&R for straightening lines.
Domande frequenti
Does NOK always mean scrap?
NO. A NOK state can require verification, rilavorazione controllata, engineering review or final rejection depending on the approved quality route.
Can a line retry until the reading passes?
NO. Rework needs a defined maximum-attempt limit and quality authority. Unlimited retries can mask a process or measurement problem.
Does this article mean the line has automatic sorting?
NO. It is a routing framework. Actual sorting, traceability and interface functions require separate verification.
No-Progress and Correction-Limit Gates
The exact phrase straightening correction limit no progress gate is medically polluted in SERP, so the canonical no-progress logic lives on the NOK sorting and rework-limit page. Define maximum correction cycles, force/stroke ceilings and mandatory stop/sort actions before production release.'