Inspecting paint and having workable standards in the supply chain

outdoorsNW

Quite Involved in Discussions
#1
I am looking for some ideas on how other people handle similar problems.

We are a contract electronics manufacturer. We have one customer with a paint spec applicable to the finished product’s exterior case as well as surfaces visible to the aircraft manufacturer but not seen when our case is installed on the aircraft. While the paint spec has some subjectivity, overall the spec is useful for determining the type and size of acceptable small paint defects. The paint is white.

There are several problems with the spec. We are working with the customer to improve the wording and pictures, but I feel I need a better understanding of how others handle similar issues.

The spec calls for viewing the case for 1-3 seconds per face, depending on the size, at a 90 degree angle. I saw a similar time limit in the only other similar paint spec we have (for a different customer). However, the case is over half curved surfaces (some are gentle and others are tight radius) so you either rotate the part or you are not viewing the part from 90 degrees. But if you rotate the part, then other surfaces are easily visible at an angle other than 90.

Our supplier (chosen by the customer) believes we are inspecting the parts too closely. However, if we do not, we risk customer returns. The end result is a user of the spec can follow the instructions, but miss problems because the light angle was slightly different in the 85-95 degree range, or the allowed time was too short. We have returns where I suspect one or both occurred.

A defect is a defect in my book. If the defect type and size exceeds the allowed rules, it is a defect even if we looked at the part for longer than intended or at a somewhat different angle.

Do others on Elsmar agree a defect that exceeds the allowed size for the type is still a defect even if you look for more time or see the defect at an angle a bit off of 90 degrees in order to allow for curved surfaces and the customer not being at a perfect 90 degrees?

The time limit seems to set the both us and our supplier up for failure because it limits the amount of inspection. If the customer has the light at even a slightly different angle, they may quickly see paint defects they we would miss if the light is at a different angle.

Because this is an airplane part, changing suppliers would be difficult and expensive.

My spec improvement thoughts are to relax or eliminate the time limit and refine how 90 degrees is defined for the curved surfaces. How to refine the 90 degree rule, I am unsure.

What thoughts do others have?
 
Elsmar Forum Sponsor

eule del ayre

Involved In Discussions
#2
Good Morning Sir, First things first, im no expert, so ill be sharing something for you, and i know you already know this one.
First, i dont know if it's manually inspected or automated?
Second, i would like you to add in your inspection criteria, the Inspection Distance, for example, 30 cm inspection height/distance. For you to know if it's NG or Good in your inspection for you to differentiate the good defects to the no good defects one.
Third, make your own spot gauge, for different defect criteria
 
Thread starter Similar threads Forum Replies Date
optomist1 Automotive News The Cost of Inspecting In Quality IATF 16949 - Automotive Quality Systems Standard 7
R Inspecting straightness tolerance of .00005" on a shaft Inspection, Prints (Drawings), Testing, Sampling and Related Topics 6
T Inspecting Full Thread Depth with a Plug Gage Inspection, Prints (Drawings), Testing, Sampling and Related Topics 4
S AS9102 FAI requirements - Inspecting with fixtures, templates AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 2
P Inspecting a difficult part - Measuring the centre of a hole to the edge of a rod Inspection, Prints (Drawings), Testing, Sampling and Related Topics 7
F How to convert inches to degrees - Inspecting the perpendicularity of 2 lines Inspection, Prints (Drawings), Testing, Sampling and Related Topics 2
C Inspecting a Profile Tolerance for a Die Cut Gasket Inspection, Prints (Drawings), Testing, Sampling and Related Topics 2
A Is Rework "Inspecting Quality In"? 21 CFR Part 820 - US FDA Quality System Regulations (QSR) 7
Q Inspecting Total Runout Inspection, Prints (Drawings), Testing, Sampling and Related Topics 10
K Inspecting a Length of Weld - High Reject Rates Manufacturing and Related Processes 7
K Probe on CNC machine - Inspecting on cnc machine tools vs. CMM Inspection, Prints (Drawings), Testing, Sampling and Related Topics 3
U Which Sampling Plan should I use? Inspecting & Dimensionally Measuring Products Inspection, Prints (Drawings), Testing, Sampling and Related Topics 8
C What to look for when inspecting incoming packaging goods such as empty retail boxes Inspection, Prints (Drawings), Testing, Sampling and Related Topics 4
J Inspecting Outside Radii of a Small Steel Stamping Inspection, Prints (Drawings), Testing, Sampling and Related Topics 26
K Inspecting subcontracted manufacturing of garments, wearing apparel Manufacturing and Related Processes 5
ScottK Inspecting surface finish on SS on a piece that can't be measured with current equip. Inspection, Prints (Drawings), Testing, Sampling and Related Topics 2
A Sampling - Measuring and Inspecting a part with both Variable & Attribute Data Inspection, Prints (Drawings), Testing, Sampling and Related Topics 12
D DNV Standards for inspecting offshore containers and baskets Various Other Specifications, Standards, and related Requirements 5
Y Inspecting Glued Components - Bubble size - Medical Device Inspection, Prints (Drawings), Testing, Sampling and Related Topics 4
Y Inspecting Quality into Product - How to react? Inspection, Prints (Drawings), Testing, Sampling and Related Topics 22
J Inspecting one at a time is quicker? Lean in Manufacturing and Service Industries 6
Claes Gefvenberg What if the inspector isn't inspecting? NASA inspector indicted Inspection, Prints (Drawings), Testing, Sampling and Related Topics 26
N Proper use of the Blueing process when inspecting the taper of bushings General Measurement Device and Calibration Topics 6
J Proper use of gauge pins - Inspecting thru holes of plastic parts General Measurement Device and Calibration Topics 19
W Where does a coatings and paint company fall in IATF? IATF 16949 - Automotive Quality Systems Standard 5
H Capability Data for Paint Thickness on Painted Parts Statistical Analysis Tools, Techniques and SPC 10
K PCI DSS - MS Paint and other screenshot tools Other ISO and International Standards and European Regulations 0
G Paint finish rejections Manufacturing and Related Processes 16
P Paint shop vs PPAP requirements IATF 16949 - Automotive Quality Systems Standard 5
J Paint Color Standards Manufacturing and Related Processes 5
V Paint batch approval procedure for automotive industry Manufacturing and Related Processes 6
R Paint Color Control Manufacturing and Related Processes 6
Ron Rompen MSA Studies of Instruments in a Paint Shop Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 2
J Individual part traceability - ink/paint sprayer? IATF 16949 - Automotive Quality Systems Standard 4
R Who Accounts For Paint Thickness - Not accounted for on Prints Manufacturing and Related Processes 5
Ron Rompen Ford Paint Audit Checklist Customer and Company Specific Requirements 4
B Paint Inspection - Paint Quality (such as rust, peel off, paint sag etc) Inspection, Prints (Drawings), Testing, Sampling and Related Topics 3
L How to Measure Paint Thickness for an Enclosure Manufacturing and Related Processes 5
T ISO 2409 / ASTM D3359 Paint Adhesion Other ISO and International Standards and European Regulations 8
S Where to get GM 4348M Paint or Powder Coating Standard Reliability Analysis - Predictions, Testing and Standards 1
D Medical Device Grade Paint for Metal Other Medical Device and Orthopedic Related Topics 1
Wes Bucey Paint, tattoo, or photoshop? Funny Stuff - Jokes and Humour 19
V Rust and Paint adhesion with new Weld Nut Supplier Manufacturing and Related Processes 5
G How good is our Paint Inspection Quality Tools, Improvement and Analysis 2
V Evaluation of Paint Specifications including such as GM 9984123 and GM 14671 APQP and PPAP 1
P How to clean paint area tile faster and improve OEE Manufacturing and Related Processes 3
I Retention Time of Paint Batch Panels once Validation completed Document Control Systems, Procedures, Forms and Templates 4
S PPAP Supplier Submission Questions - Automotive Paint IATF 16949 - Automotive Quality Systems Standard 2
L Assessing Corrosion Damages on Steel finished externally with Epoxical Paint Various Other Specifications, Standards, and related Requirements 1
M For Bulk Material (eg. paint), are there any guidelines for Ford PPAP Requirements? APQP and PPAP 1

Similar threads

Top Bottom