Molybdenum plate, as a metallic material with excellent mechanical properties, remains unyielding under high temperatures and is corrosion-resistant, yet its high hardness and processing difficulties pose challenges for drilling techniques. To elevate the processing efficiency and quality of molybdenum plate drilling, the following are the crucial steps and technical essentials:
I. Choosing the Right Drilling Tools
- Tool Material: Given the high hardness of molybdenum plate, ordinary cutting tools are inadequate. High-hardness tool materials, such as tungsten carbide drills or precision carbide alloy drills, should be employed. These drills can more effectively penetrate the molybdenum plate, minimizing wear and deformation.
- Tool Shape and Size: Selecting the appropriate drill shape and size based on the molybdenum plate’s thickness, hardness, and drilling requirements is essential. The drill design should ensure stability during the drilling process, reducing vibration and deviation.
II. Optimizing Drilling Process Parameters
- Rotation Speed and Feed Rate: Reasonable rotation speeds and feed rates are crucial for ensuring drilling efficiency and quality. Excessive rotation speeds can lead to overheating and accelerated wear of the drill, while insufficient speeds can affect drilling speed. The feed rate must also be adjusted according to the drill material and molybdenum plate hardness to prevent excessive cutting forces that might cause drill breakage or workpiece deformation.
- Coolant Usage: Applying coolant during the drilling process can effectively lower cutting temperatures, reducing tool wear and workpiece deformation. The choice of coolant should be determined based on the molybdenum plate’s material and processing conditions, ensuring excellent cooling and lubrication effects.
III. Adopting Advanced Drilling Technologies
- Laser Drilling Technology: Laser drilling boasts high precision, efficiency, and non-contact processing advantages, particularly suitable for drilling difficult-to-machine materials like molybdenum plate. The tiny diameter of the laser beam enables micrometer-level precision control, and the non-contact processing avoids mechanical damage or deformation that might occur in traditional processes.
- CNC Technology: Integrating CNC technology into drilling processes enables precise calculation and control of drilling coordinates, enhancing drilling accuracy and efficiency. By programming the computer with G-code and transmitting it to the corresponding system, the drilling process can be automated, reducing human errors and labor intensity.
IV. Attending to Details During the Drilling Process
- Workpiece Clamping: Before drilling, ensure the workpiece is clamped flat and securely to prevent vibration or deviation during drilling, which could lead to positional deviations or non-circular holes.
- Test Drilling and Correction: Conduct test drilling before the actual drilling to check if the drill is aligned with the hole center. Adjust promptly if deviations are found to ensure accurate hole positioning.
- Chip Removal: Regularly clear away chips during drilling to prevent accumulation that might affect drilling quality and tool life.
Achieving efficient and precise molybdenum plate drilling requires selecting the right drilling tools, optimizing drilling process parameters, adopting advanced drilling technologies, and attending to details during the drilling process. Comprehensive application of these key steps can significantly enhance the processing efficiency and quality of molybdenum plate drilling, fulfilling modern industry’s demands for high-precision, high-efficiency processing.