Cilindro

Disponível somente no TrabalhosFeitos
  • Páginas : 4 (980 palavras )
  • Download(s) : 0
  • Publicado : 16 de dezembro de 2012
Ler documento completo
Amostra do texto
Cylinder Bore Surface Texture Analysis
Mark C. Malburg, Ph.D.
Digital Metrology Solutions, Inc.

010001000100 110101010011 010001000100 110101010011 010001000100 110101010011 010001000100110101010011

Digital Metrology Solutions
1

Copyright 2002 Digital Metrology Solutions, Inc.

Overview
• Why is plateau honing important? • How do you measure this?
– Instruments, settings (andproblems)

• How do you describe the surface?
– Traditional methods – Rk parameters – Probability Parameters

Copyright 2002 Digital Metrology Solutions, Inc.

2

Cylinder Liners/Bores
• “Letthe engine do it”
– Given a rough surface, the engine will/may plateau itself.
• Time, debris, wear of other components

• Plateau Honing
– Generate a rough surface and remove the high areas ina controlled manner.

Copyright 2002 Digital Metrology Solutions, Inc.

3

Plateau Honing

Copyright 2002 Digital Metrology Solutions, Inc.

4

Why Plateau Honing?
Generate a surfacetexture that has the benefits of a smooth surface and the benefits of a rough surface.
Smooth on top Rough underneath

Copyright 2002 Digital Metrology Solutions, Inc.

5

Surface Functionality• Friction? Running clearance?
– Smoother plateau

• Wear? Sealing?
– More contact area

• Lubrication Retention? Debris Collection?
– Increased valley volume

Copyright 2002 DigitalMetrology Solutions, Inc.

6

A Complete Report (2D + 3D)

Copyright 2002 Digital Metrology Solutions, Inc.

7

Stylus Based Approaches
• Two basic means
– Skidless
• Laboratory Style • StylusTip is the only thing that contacts the surface.

– Skidded
• A radiused “skid” rests on the surface and serves as a reference.

Copyright 2002 Digital Metrology Solutions, Inc.

8 Skidless Measurement
• Provides “true” picture of surface
– Including waviness

• Alignment is critical
– Limited Working Range

• Sensitive to Vibration
– Test by measuring an optical flat....
tracking img