MACTRIB

Machining & Tribology Research Group

 



 

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Tribology Equipment

Tribometer  Pin-on-Disc "PLINT TE/HT"
Micro-Hardness Tester "HMV2000" 
Hardness Tester Frankshop "FRANK 38180"
Analytical Balance "GR-200-EC"
Profilometer "Hommeltester T1000"
 

Tribometer  Pin-on-Disc "PLINT TE/HT"

Description:

A pin-on-disc Tribometer PLINT TE/HT connected to a computer was used to evaluate the friction coefficient and linear wear of the materials tested against steel.

Test methodology consists in pressing the disc on a rotating plate with a central bolt. The pin is fixed to the load arm with a chuck. The pin stays on the disc with two freedom degrees: a vertical one, which allows its direct contact with the surface of the disc, and a horizontal one, which causes contact friction, activating the load cell with a strain which is a function of the friction torque. The motor has tachogenerator feedback to ensure stable running speeds. The sliding speed is achieved adjusting the radius of the test track. The pin carrier slides along a groove and a scale rule is used to set the radius to the middle of the pin

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Micro-Hardness Tester "HMV2000" 

Description:

The micro hardness tester is an appliance indispensable for researches of the metal structrure, quality of control of products, researches and development of new materials. It is a prime requisite for testing the hardness of minute components and the metal structure of precision instruments or the hardness of the worked or plated surface layer that a definite micro spot can be measured, the measured spot leaves practically no scratch and the measured value is highly reliable.

Automation of loading, holding of loads, unloading and selection of the test load eliminates the individual error during loading.

This tester uses the identation hardness test method. This test penetrates a permanent deformation on the test piece surface using an indenter of diamond or other rigid body     and determines the hardness of the test piece based on the load used to generate the deformation and the dimensions of the generated deformation. Commoly used methods as Vickers hardness, Rockwell hardness, Brinell hardness are included.

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Hardness Tester Frankshop "FRANK 38180"

Description:

The FRANKSHOP 38180 hardness tester serves for determining the hardness of metallic materials using the Brinell system according to DIN 50351, ISO/R 79 ISO R/ 184, using the Vickers system according to DIN 50133, ISO /R 81 ISO /R 192, using the Rockwell systems C , A, B and F according to DIN 50103 and ISO/R 80, using the Rockwell systems A...H, K...M, P...S and V according to ASTM E 18, and for determining the hardness of polymer materials using the Rockwell systems E, K..M.

The tester consists of a rigid housing stand with advance mechanism, the loading device, the optical measuring device and mount for the specimen. The testing force is generated by releasing the weights manually. The impact speed can be adjusted with an oil brake with regulating mechanism. 

Finally, the spherical and pyramid shaped impressions can be measured using the projector with ground glass plate.

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Analytical Balance "GR-200-EC"

Capacity:                                            210 g

Min. piece weight at counting:          0,1 mg

Reproducibility:                                 0,1 mg

Linearity:                                           0,2 mg

Stabilisation time:                              3.5 s

Weight :                                              6 Kg

Internal adjusting weight

Software WIN-CT

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Profilometer "Hommeltester T1000"

Description:

The Hommel Tester  T 1000 represents a modern, easy to handle, portable. Measurement preparation and measuring runs are carried out with 4 electronic membrane switches. Calibration on a regular basis is no longer needed as the central micro-processor retains a fixed value against which measured profiles are evaluated. All parameters and measured values are displayed on a large, 8 digit LCD display.

A number of standard surface roughness parameters (Ra, Rz, Rt, Rmax, tpi, tpa, etc) are available for determining the magnitude of surface flaws and characterizing the surface profile.Dependent upon type of parameter meadured, these are calculated from the unfiltered, measured profile, the filtered roughness profile or the filtered waviness profile.

The benefit of measuring surface topography is to detect surface flaws which are generated by the manufacturing process. This allows specific steps to be taken to hold the surface finish within tolerances permitting the correct function of the part. It should be remembered though, that the task of surface measurement is not to create as smooth a surface as possible. A highly finished surface is far more expensive to manufacture and may also function less well than a rougher surface..

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MACTRIB - Department of Mechanical Engineering , University of Aveiro

Campus Universitßrio de Santiago, 3810-193 AVEIRO, PORTUGAL

Tel: + 351 370 830, Fax: +351 234 370 953