Procedure for Direct Abrasive Cutting of Samples
1. Introduction
Direct abrasive cutting is an important enough process for preparing samples for testing or analysis. It involves cutting materials and shaping them with an abrasive wheel or belt. In order to ensure that the process is performed safely, correctly and efficiently, it is essential that the pre-determined Guidelines and Procedures be followed.
2. Preparation
2.1. The operator must ascertain that the machine has been set up correctly and that all guards and shields are in place and secure.
2.2. Check the working area to ensure that it is clean and that no obstructions are present.
2.3. Select the required abrasive wheel, belt or disc and attach it to the spindle securely.
2.4. The operator must fit the appropriate eye protection as required by the site.
2.5. Check that the workpiece is correctly positioned in the machine.
2.6. Switch on the machine and check that the machine is operating correctly.
3. Cutting
3.1. The operator must ensure that the wheel, belt or disc is travelling in the correct direction.
3.2. The operator should adjust the speed of the wheel or belt as required by the material to be cut.
3.3. Apply consistent and even force to the workpiece as it is being cut.
3.4. Do not overload the wheel or belt, as this may cause it to break.
3.5. Monitor the temperature of the wheel, belt or disc.
4. Completion
4.1. Switch off the machine and allow the wheel, belt or disc to come to a complete stop.
4.2. Remove the workpiece from the machine and check that the cut has been made as required.
4.3. Clean any swarf and debris from the machine and working area.
5. Maintenance
5.1. The operator must clean and maintain the machine on a regular basis according to the manufacturer’s recommendations.
5.2. Visual checks of the wheel, belt or disc should be made on a regular basis.
5.3. Replace the wheel, belt or disc when it is worn or oversized in diameter.
6. Emergency procedures
6.1. In the case of fire, the operator must switch off the machine and evacuate the building.
6.2. In the case of emergency, the operator must switch off the machine and call for assistance.
7. Conclusion
This Procedure for Direct Abrasive Cutting of Samples is intended as a guideline for optimal sample preparation. Following this Procedure and using safety precautions, the risk of injury and damage to samples is reduced and the reliability of the sample cutting process is increased.
