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TOP-TREAT: In House Heat Treatment

REV:04/23/09

SCOPE: This procedure establishes a system in which Trinity Forge processes, monitors and inspects in-house heat treatment of production parts and raw material.

STEP WHO WHEN INFO TO USE WHAT TO DO RESULTS

1

Post Forge Supervisor, Maintenance Supervisor

As need to heat treat production parts or raw material

Shop Schedule

Schedule furnace time to heat treat production parts or raw material; notify Maintenance Man and Heat Treat Worker parts need to be heat treated.

Time scheduled to heat treat parts or raw material

2

Maintenance Man

Notification parts need to be heat treated

Calibration Schedule for heat treat furnace and furnace sensors

Monitor heat treat furnace and furnace sensors; calibrate per schedule

Heat Treat furnace monitored and calibrated

3

Heat Treat Worker

Upon receiving parts to be heat treated

Production Floor Traveler; Shop Schedule; Spec ID

Verify parts or material on Traveler are to be heat treated; record information in Heat Treat Log.

Parts or material verified for heat treatment and recorded

4

Heat Treat Worker

Beginning of heat treat cycle

Instructions listed on Production Floor Traveler

Load parts or raw material into furnace baskets; load into heat treat furnace; set furnace temperature and cycle time.

Heat treatment started

5

QC Inspector II

During heat treat cycle

Production Floor Traveler; Heat Treat Chart

Verify information recorded on Heat Treat Chart; verify furnace temperature.

Heat Treat Chart and furnace temperature verified

6

Heat Treat Worker

End of heat treat cycle

Production Floor Traveler

Remove baskets from furnace; forward to a cooling area; when parts are completely cool, tag them; check hardness; record hardness on Hardness Inspection Sheet; verify hardness* per TOP-HARDT.

Note: When checking hardness a sample must be pulled from the top and the bottom of each basket or load for smaller heat code quantities.

Cycle completed; hardness checked, recorded and verified

7

Heat Treat Worker

Parts or material fails hardness

Hardness results recorded on Hardness Inspection Sheet

Notify QC Supervisor or Post Forge Supervisor for resolution when parts or material fail hardness testing.

Notification made of hardness failure

8

Post Forge Supervisor, QC Supervisor

Notification received of hardness failure

Hardness results recorded on Hardness Inspection Sheet

Make decision to re-heat treat or scrap parts or raw material; notify Heat Treat Worker of decision.

Decision made to re-heat treat or scrap parts or raw material

9

Heat Treat Worker

Parts pass hardness testing

Hardness results recorded on Hardness Inspection Sheet; Heat Treat Chart

Forward heat treated parts or material to Post Forge to process per TOP-BLAST; clock off Production Floor Traveler.

Parts or material forwarded to Post Forge and processed; clocked off Traveler

*Trinity Forge General Hardness Chart

Lot Size Sample Size Defects Accepted Defects Rejected

1-5 All 0 0
6-10 1 0 1
11-20 2 0 1
21-50 3 0 1
51-100 4 0 1
101-200 6 0 1
201-400 10 1 2
401-600 13 1 2
601-1000 16 1 2
1001+ 20 2 3

For information on a document or record, including definition, primary responsibility and retention, refer to the Document and Record Master List.


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