Tribology: Pin/Ball-on-disk test equipment

Description:

For the investigation of the sliding wear behaviour of material combinations, three pin on disk wear test machines were designed and constructed.
Pin on disk wear tests are carried out by applying a constant normal load in the contact while rotating the disk at constant speed. The friction force is continuously measured and stored.
POD I POD II POD III

First generation POD test machine

  • Wear contact occurs at normal temperatures and humidities (laboratory conditions)
  • Dead weight loading of pin on disk
  • Friction force measured directly by force transducer
  • Modified for use in heated oils, lubricants : < 150 °C

Example:

Simulation of wear behaviour on a crank-connecting rod mechanism

Improved mechanical design of POD I

  • Wear contact occurs at normal temperatures and humidities (laboratory conditions)
  • Dead weight loading of pin/ball on disk
  • Friction force measured directly by force transducer

Examples:

  • TiN coated tool steels for cutting tools
  • Codeposited microcaps in Ni-coatings

Totally new design for sliding wear tests in aqueous environments

  • Wear contact can be immersed or sprayed by a liquid
  • Spring loading of disk on ball
    Advantage : damping of harmonics and higher stability of wear contact
  • Friction force measured by torque transducer

Example:

TiN coatings for cutting tools in aqueous emulsions

Technical details:
POD I POD II POD III

Normal Load:
0 to 20 N dead weight

Rotation speed:
0 to 1000 rpm

Track diameter:
20 mm < Øtr < 50 mm

Max. tangential speed:
± 2.5 m/s

Friction force:
Max. Ff = 60 N
Res.: 5 mN

Testsamples:
Drawings are available
Dependent on task, holders should be designed.

Counterbody:
Pin drawing is available

Normal Load:
0 to 20 N dead weight

Rotation speed:
0 to 400 rpm

Track diameter:
20 mm < Øtr < 50 mm

Max. tangential speed:
± 1 m/s

Friction force:
Max. Ff = 60 N
Res.: 5 mN

Testsamples:
Drawings are available
Dependent on task, holders should be designed.

Counterbody:
Pin drawing is available
Standard ball Ø = 10 mm

Normal Load:
0 to 60 N dead weight

Rotation speed:
0 to 2000 rpm

Track diameter:
20 mm < Øtr < 50 mm

Max. tangential speed:
± 5 m/s

Friction force:
Max. Mf = 2 Nm, Ff = 200 N
Res.: 1 mNm, 50 mN

Testsamples:
Drawings are available
Dependent on task, holders should be designed.

Counterbody:
Standard ball Ø = 10 mm

Electrochemistry:

  • Three electrode cell
    Working electrode: disk sample
    Counterelectrode: Pt-wire
    Ref. Electrode: Ag/AgCl ( +0.207 mV SHE )
  • Potentio-, galvanostat: EGG 273 A ( ± 20 V, ± 2 A )

 
Room:
POD I: 01.20 POD II: 01.26 POD III: 01.26

 
More Technical information: Techinfo@mtm.kuleuven.be
 

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Last modified: January, the 15th, 2002