Optical 3D-measurement and its use in minting Alicona - Mr. - PowerPoint PPT Presentation

Optical 3D-measurement and its use in minting Alicona - Mr. Dipl.-Ing. Christian JANKO Münze Österreich - Mr. Ing. Alfred GNADENBERGER 29.1.2015

Index: 1. Introduction to Alicona 2. 3D measurement: principle - accuracy 3. Surface roughness 4. Comparison of tactile and optical method 5. Design / Analysis / Quality assurance 6. Reproduction of medals 7. Rimming profiles of blanks

High resolution optical 3D measurement • Global supplier of systems based on Focus-Variation • International team of ~100 employees • Driving force for traceable optical roughness measurement • Worldwide cooperations Surface and form Coorporations measurement

3D measurement in research and production » Micro precision » Medical technology • Tool industry manufacturing and pharmaceutics » Automotive » Aerospace and » Injection moulding industry aeronautics

Index: 1. Introduction to Alicona 2. 3D measurement: principle - accuracy 3. Surface roughness 4. Comparison of tactile and optical method 5. Design / Analysis / Quality assurance 6. Reproduction of medals 7. Rimming profiles of blanks

Measurement technique: Focus-Variation

Technical specifications Infinite Focus Resolution and application limits 2.5x 5x 10x 20x 50x 100x Best vertical resolution nm 2300 410 100 50 20 10 Working distance mm 8 22.5 16.5 18 10 4 Max. measurable area mm² 10000 10000 10000 10000 3940 985 Max. measurable profile length mm 100 100 100 100 100 100 Min. measurable roughness (Ra) µ m - - 0.3 0.15 0.06 0.03 Min. measurable radius µ m 20 10 8 5 2 1 ° Max. measurable slope angle 87 Accuracy U = 25 nm, σ = 2 nm Ra = 100 nm Profile roughness U = 40 nm, σ = 2 nm Ra = 500 nm U = 20 nm, σ = 2 nm Sa = 100 nm Areal roughness U = 30 nm, σ = 2 nm Sa = 500 nm E Uni:St:ODS,MPE = 500 nm, σ = 0.1 µm z = 1000 µm E Uni:St:ODS,MPE = 400 nm, σ = 0.05 µm z = 100 µm Height measurement E Uni:St:ODS,MPE = 300 nm, σ = 0.025 µm z = 10 µm E Uni:St:ODS,MPE = 150 nm, σ = 0.01 µm z = 1 µm xy bis 1 mm E Bi:Tr:Opt,MPE = 0.7 µm Distance measurement xy bis 10 mm E Bi:Tr:Opt,MPE = 1.0 µm

Index: 1. Introduction to Alicona 2. 3D measurement: principle - accuracy 3. Surface roughness 4. Comparison of tactile and optical method 5. Design / Analysis / Quality assurance 6. Reproduction of medals 7. Rimming profiles of blanks

3D dataset

Surface of blanks

Index: 1. Introduction to Alicona 2. 3D measurement: principle - accuracy 3. Surface roughness 4. Comparison of tactile and optical method 5. Design / Analysis / Quality assurance 6. Reproduction of medals 7. Rimming profiles of blanks

Tactile measurement instrument • Measuring points on one line • Storage of samples for further measurements necessary • Documentation of results • Calibration work with normals

Optical 3D-measurement • Certain area or whole die • Relief – „mother file“ • New measurements on special details always possible – points on lines, distances, relief heights and radiuses

Index: 1. Introduction to Alicona 2. 3D measurement: principle - accuracy 3. Surface roughness 4. Comparison of tactile and optical method 5. Design / Analysis / Quality assurance 6. Reproduction of medals 7. Rimming profiles of blanks

Coining die

Immediate „visual impression“ by using a colour scale for reliefs

Automatical adjustment and comparison of two coining dies or mother tools

Comparison of two dies (new and wasted) Green areas with a max. tolerance of 10µm

Comparison of two dies (new and wasted) – refinement to a max. tolerance of 5 µm (green area)

Milling quality – Comparison of coining dies of 2005 and 2012 on detail „0“ Measuring line

Coining die 2005 Distanz [µm] Breite „0“ links 333,7265

Coining die 2005 distance [µm] Breite „0“ links 333,7265 Coining die 2012 distance [µm] Breite „0“ links 408,8674

Index: 1. Introduction to Alicona 2. 3D measurement: principle - accuracy 3. Surface roughness 4. Comparison of tactile and optical method 5. Design / Analysis / Quality assurance 6. Reproduction of medals 7. Rimming profiles of blanks

Reproducion of medals with a silver „model“

Medal

medal 3D-measuring

medal 3D-measuring Milling program file

medal 3D- measurement Milling program file Production of coining die

medal 3D-measuring Milling program file Production of coining die Coining of new medal

medal 3D-measuring Milling program file Production Coining die Coining new medal 3D-measuring of new medal

Original medal

Original medal Reproduction

Index: 1. introduction alicona 2. 3D measurement: principle - accuracy 3. Surface roughness 4. Comparison of tactile and optical method 5. Design / Analysis / Quality assurance 6. Reproduction of medals 7. Rimming profiles of blanks

Rimming profile - blanks

Summary: • More features and possibilities with 3D • Faster and more reproduceable additional measurements • No storage of samples necessary – only „mother file“ • 6 month of using the system • Tactile measuring fully removed by 3D-measurement • Still discovering more possible applications

The end! Thank you for your attention!