Taladrado

Summary

This instructional video provides a detailed step-by-step guide on using a milling-drilling machine for drilling operations. It covers safety precautions, machine setup, and the process of drilling holes with different sized bits (5 mm and 13 mm). The video also emphasizes correct machine settings, tool changes, lubrication, and cleaning, as well as maintaining proper posture and safety gear. Key tips include adjusting RPMs, verifying machine condition, and using parallel blocks to secure material. The video concludes with post-drilling tasks like deburring and cleaning the machine.

Takeaways

• 😀 Ensure safety by wearing protective goggles and avoiding loose clothing, jewelry, and long sleeves while working with the drill.
• 🛠️ Use parallel guides to securely position the material and avoid damaging the machine's guides during drilling.
• ⚙️ The machine is powered by raising a lever; always check the oil level and inspect wires before starting the drilling process.
• 🔧 Adjust the drilling speed using the machine's selector switches to match the drill bit size and material requirements.
• 🔩 To change the head height, loosen the locking nuts and use the lever to raise or lower the machine head, ensuring proper drill clearance.
• ⚡ When adjusting revolutions per minute (RPM), ensure the correct speed is selected for different drill bit sizes (e.g., 1500 RPM for 13 mm drill).
• 🧴 Lubricate the drill bit during operation to prevent overheating and ensure smooth drilling.
• 🔄 Use a 5 mm drill bit for pre-drilling before switching to the final 13 mm drill bit for the main hole.
• 🧹 Clean the work area after drilling by brushing off metal chips to avoid injury and maintain a safe environment.
• 💡 Always check the drill bit and machine settings before starting to ensure everything is secure and operating correctly.

Q & A

What is the purpose of the drilling operation described in the script?

The purpose of the drilling operation is to create a hole with a final diameter of 13mm, starting with a pre-drill of 5mm diameter, on a material of 15mm thickness. The operation is performed to prepare the material for further tasks.

What safety measures are highlighted for the drilling operation?

Key safety measures include wearing protective eyewear, ensuring that there are no exposed or damaged cables, checking oil levels in the machine, wearing short-sleeved clothing, and avoiding loose clothing, jewelry, or accessories.

How is the material secured before drilling?

The material is secured using two parallel bars, which raise the material to the required height to avoid damaging the machine's guides. A copper hammer is used to further ensure that the material is properly set.

What tool is used to adjust the machine's head for clearance before drilling?

To adjust the machine's head for clearance, the technician loosens two nuts and uses a lever to raise the head to an ideal position where the drill bit does not interfere with the press jaws.

How are the machine's revolutions per minute (RPM) adjusted for the drilling operation?

The RPM is adjusted using two levers. The first lever controls the speed range, and the second lever fine-tunes the RPM according to the required drilling speed. For example, an RPM of 1500 is selected for the 5mm pre-drilling, and an RPM of 450 is chosen for the 13mm hole.

Why is coolant used during the drilling operation?

Coolant, in the form of lubricant or coolant fluid, is used to reduce friction and prevent overheating of both the drill bit and the material during the operation, thus extending the life of the tools and improving the quality of the drilled hole.

What steps are taken to prevent accidents when handling drill bits?

When changing drill bits, the technician uses a tool to secure them tightly and ensures that the machine is properly set before starting the operation. The technician also wears protective gloves to avoid handling hot or sharp bits directly with their hands.

How does the technician ensure the precision of the drilled hole?

Precision is achieved by adjusting the machine's sensitive lever, which allows the technician to apply controlled pressure on the material. Additionally, fine adjustments can be made using a manual crank for more precise depth control.

What is the purpose of the reamer mentioned in the script?

The reamer, which has a 60-degree angle, is used to remove burrs from the edge of the drilled hole after the final diameter has been achieved. This ensures a clean and smooth finish, preventing sharp edges that could cause injury or difficulty in handling.

How does the machine prevent excess movement during the drilling process?

The machine has locking mechanisms for both the transversal and longitudinal movements of the worktable. These locks ensure that the table remains stationary and that no unintended movement occurs during the drilling process, ensuring accuracy.