Precautions for Drilling and Milling Machine operations

I. Precautions for Preparations Before Operation

1. Personnel qualifications and protection ‌ : Operators must be professionally trained and hold certificates to work. They should wear well-fitting work clothes with cuffs fastened. Gloves and scarves are strictly prohibited. Long hair must be fully tucked into the work cap. Protective glasses should be worn and earplugs should be selected as needed.

2. equipment inspection and confirmation ‌ : Check item by item against the equipment self-maintenance inspection table to ensure that the grounding wire is intact, the emergency stop button, the lighting lamp and other safety components are sensitive and reliable. Complete the lubrication of the entire machine according to the lubrication chart. After starting up, let the main shaft idle for 1 minute to confirm that there are no abnormal operations.

3. Tooling and workpiece preparation ‌ : Clean the chips and oil stains on the clamping surface of the workpiece and the surface of the fixture. Select the appropriate fixture according to the shape of the workpiece, and firmly clamp the workpiece. It is strictly forbidden to directly hold the workpiece by hand for processing. Check the sharpness of the cutting edge of the tool, the coaxiality of clamping, and ensure that the contact surface of the taper shank is clean and free of scratches.

4. Pre-adjustment of ‌ process parameters ‌ : Select the appropriate rotational speed based on the workpiece material, hole diameter/milling size. Choose low speed for large diameter holes and high speed for small diameter holes. Adjust the feed rate and penetration depth in advance. Special deep hole cutting oil should be prepared in advance for deep hole processing.

Ii. Precautions for Regular Processing Procedures

1. cutting operation control ‌ : Stay fully concentrated throughout the processing. It is strictly forbidden to talk to others or leave the running equipment without permission. Do not enter the spindle for cutting before it reaches the rated speed. Do not change the speed, tools or measure the workpiece while the equipment is running.

2. Standard handling of ‌ chips ‌ : When long iron chips are entangled on the drill bit, the machine must be stopped and special tools such as brushes and iron hooks should be used for cleaning. It is strictly forbidden to pull them by hand, blow them with the mouth or directly sweep them with compressed air.

3. Emergency response for ‌ abnormalities ‌ : If abnormal conditions such as unusual noises, severe vibration, loose drill bits, or poor chip removal occur during processing, immediately stop the machine and cut off the power to troubleshoot. Only resume operations after eliminating potential hazards.

4. General Operating Prohibitions ‌ : It is strictly prohibited to drill directly on inclined planes. When drilling through holes, a pad must be added under the workpiece. When the hole is about to be drilled through, switch to manual feed and light pressure operation. It is forbidden to perform lateral cutting operations with the side of the drill bit.

Iii. Special Precautions for Deep Hole Processing

1. Pre-guiding preparation ‌ : Before drilling, drill a flat and accurate center hole at the positioning point of the workpiece to serve as a guide and prevent the drill bit from tilting.

2. segmented chip removal operation ‌ : After drilling to a depth of 2-3 times the hole diameter, withdraw the drill bit to thoroughly clean the chips in the hole and in the chip removal groove to prevent chip blockage and overheating of the drill bit leading to breakage.

3. Continuous cooling guarantee of ‌ : Throughout the process, deep hole cutting oil is precisely delivered to the cutting area through the internal channels of the drill bit or dedicated nozzles, ensuring cooling, lubrication, and auxiliary chip removal effects.

4. Uniform feed control ‌ : Throughout the process, low speed and small feed rate parameter Settings are adopted to maintain uniform processing and avoid uneven force on the drill bit caused by sudden changes in rotational speed or feed rate.

Iv. Precautions for Post-processing Finishing and Maintenance

1. Workpiece and equipment cleaning ‌ : After processing is completed, slowly withdraw the tool, clean the residual chips and cutting fluid on the surface and in the holes of the workpiece, and check whether the dimensional accuracy and surface roughness of the workpiece meet the standards.

2. Tools and equipment repositioning ‌ : After disassembling the tools, clean the chips and oil stains on the cutting edge, check the wear condition, grind or replace the damaged tools in time, and store them properly; Turn the operating handle to the neutral position and cut off the main power supply of the equipment.

3. On-site organization norms ‌ : Wipe the entire machine equipment, clear the scattered chips in the work area, and neatly place tools, measuring tools and cutting tools in the designated safe positions to keep the operation site clean and orderly.