Determination of friction and wear characteristics of tool material by simulation testing
A scratch test machine is used to simulate the microforming conditions during the die forging process. The scratch test is regarded as a miniature frictional process which is similar to the die punching process with respect to contact pressure, normal force, sliding speed and distance on wear...
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| Format: | Final Year Project |
| Language: | English |
| Published: |
2010
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10356/40611 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | A scratch test machine is used to simulate the microforming conditions during the
die forging process. The scratch test is regarded as a miniature frictional process
which is similar to the die punching process with respect to contact pressure, normal force, sliding speed and distance on wear and friction. This is to assess the
wear resistivity of the tool material during the actual die forming process. In the
testing repetitive scratching is performed on the workpiece model with a customized pin specimen. The friction force ratio, coefficient of friction, wear rate
and wear track profile are being evaluated. It is found that the wear rate has an
exponential relationship to the increasing number of scratches. However this relationship is true to a certain extent. It is also found that low coefficient of friction does not constitute to low wear rate in the present study. |
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