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DFMEA案例(英文)

Failure Mode and Effects Analysis

(Design FMEA)

FMEA Number:

Page

System/Component:

Prepared by:FMEA Date (Orig.)

Core Team:

ActionsTaken

S e v

O c c u

D e t e

R.P.N.

1.Insufficient Intensity 1.1 Strengthened Rib

2.Stress Centralization

2.Smooth Transition Mould manufacturing

1.Structure Broken 1.Insufficient Intensity 1.Thicken the wall

Mould manufacturing

1.Connecting Area of Backframe Broken 1.Too large pre-tension moment of the bolt 1.Controlling tensing moment

2.Connecting Loosely 2.Bolt Loosening 2.Applying locknut or springwasher 1.Connecting Area of Backframe Broken 1.Insufficient Intensity

1.Strengthened Rib

2.Connecting Loosely 2.Bolt Loosening

2.Applying locknut or springwasher

1.Fabricband Aging

2.Connecting Loosely

Among Fabricband,Waistband,Backframe 1.Fabricband Lossen

1.Insufficient Intensity 1.Improving Structure

2.Connecting Area of

Backframe Broken

2.Stress Centralization 2.Smooth Transition 7.SE7 Fixed

Connecting Lossely

SE7 swinging and sliding off

7Bolt Loosening 1Applying locknut or springwasher

Prototype Experiment 2148.Pipeline Connection

Iterference and Unfavorable to Use Pipeline swinging and

hitching

5Bolt and binding belt lossening

1Tightening bolts and belts

Prototype Experiment 159.Accessories Failure

Connecting Unreliably and Loosely Accessories fall off and

don't work

5Connecting and accessories failure

1Improve connection and accessories

Prototype Experiment 1510.Material Softening and Brittle

Unable to carry SCBA 9backframe broken 6Improving Material Prototype Experiment 316211.Marker

Uneasy to See

Lost label

5

Unappropriate location and glue failure

1

Correct locationand improve the glue

Prototype Experiment

1

5

4.Reducer Support 14

Unable to control rotating angle

5.Rotating Angle Adjust Unable to carry SCBA 9

5

214

Prototype Experiment 1.ProE_Mechanica;2.Ptototype Experiment

72

21.ProE_Mechanica;2.Prototype Experiment

4

9

1.ProE_Mechanica;

2.Prototype Experiment

Band Quality 9

722.Expand Contacting Area

2.Unable to limit displacement 72

Uable to make waistband rotate 135

S e v

4

723.Waistband Rotating (Bolt Connection)

92.Waistband Rotating (Plastic Structure) 2.Insufficient Contact Area

Design Responsibility:

Potential Effect(s) of

Failure

1.Backframe Platfom

D

e t e c

R.P.N.

Recommended Action(s)

Responsibility &Target Completion

Date

R&D

Potential Cause(s)/Mechanism(s) of Failure

Cylinder swinging and sliding off

Improving Band Quality 2 Item / Process

Function

3Waistband rotating

unsmoothly, even failing to work

Current Design Controls Prevention Potential Failure Mode

O c c u r

1.ProE_Mechanica;

2.Prototype Experiment

6.Cylinder Boundling 74Action Results

Backframe Broken

(Up\Middle\Bottom Side)Unable to carry SCBA Current Design Controls Detection

2561.ProE_Mechanica;2.Ptototype Experiment