Introduction-to-Drilling-Machine-Operations.pptx

Introduction to drilling machine operation

1. Introduction to Drilling Machine Operations by SHREYAS This is the operation of making a circular hole by removing a volume of metal from the job by a rotating cutting tool called drill bit.

2. Types of Drilling Machines Drill Press Stationary machines with vertical spindles, ideal for general purpose drilling and boring operations. Radial Drill Arm-mounted drill heads that can be positioned over a large work area, perfect for fabrication and repair work. CNC Drill Computer-controlled drilling machines that offer unparalleled precision and efficiency for high-volume production.

3. Drill Bit Selection and Maintenance 1 Bit Material Choose high-speed steel or carbide bits based on the workpiece material. 2 Bit Size Select the appropriate diameter and length to match the job requirements. 3 Bit Sharpening Regularly sharpen bits to maintain optimal cutting performance. 4 Bit Lubrication Apply the right cutting fluid to reduce heat, friction, and wear.

4. Drilling Techniques and Procedures 1 Hole Positioning Carefully mark and center-punch the desired hole location. 2 Drilling Sequence Start with a pilot hole, then step up to the final diameter. 3 Chip Removal Regularly clear chips to prevent binding and overheating.

5. Safety Considerations in Drilling Operations Personal Protective Equipment Wear safety glasses, gloves, and appropriate clothing to prevent injuries. Workpiece Securement Ensure the workpiece is firmly clamped or held in place to prevent movement. Drill Bit Condition Inspect bits for cracks, chips, and proper sharpness to avoid breakage. Dust Control Use a shop vacuum or other means to capture and contain airborne particles.

6. Drilling Speeds and Feeds Spindle Speed Adjust the machine's RPM based on the drill bit size and workpiece material. Feed Rate Control the rate of drill bit advancement to prevent overheating and premature wear. Coolant Application Use the right cutting fluid to dissipate heat and improve surface finish.

7. Troubleshooting Common Drilling Issues Drill Bit Wandering Ensure proper bit alignment and workpiece clamping. Hole Oversizing Adjust feed rate and spindle speed to match the workpiece and bit. Drill Bit Breakage Inspect bits for wear, use the correct coolant, and avoid excessive force.

8. Drilling Machine Maintenance and Repair Lubrication Regularly oil moving parts to reduce wear and improve performance. Spindle Alignment Ensure the spindle is properly aligned to prevent runout and vibration. Belt Replacement Replace worn belts to maintain consistent power transmission. Cleaning Keep the machine and work area clean to prevent contamination.