1. Introduction to Conventional Drilling Machines
Conventional drilling machines come in various types, including:
Bench Drilling Machine: A small drilling machine that can be placed on a workbench, with a vertically arranged spindle.
Vertical Drilling Machine: The spindle head and worktable are mounted on a column, with a vertically arranged spindle.
Radial Drilling Machine: The arm rotates around the column and moves up and down, with the spindle head moving horizontally along the arm.
Milling and Drilling Machine: The worktable can move longitudinally and transversely, with a vertically arranged spindle, capable of milling operations.
Deep Hole Drilling Machine: Uses special deep hole drills, where the workpiece rotates while the drill bit advances with high-pressure cutting fluid.
Flat-End Face Center Hole Drilling Machine: Designed for machining shaft ends and center holes using center drills.
Horizontal Drilling Machine: Has a horizontally arranged spindle with a spindle head that can move vertically.
2. Introduction to CNC Drilling Machines
CNC drilling machines are controlled by a CNC system for precise machining. They come in single-table and double-table formats, utilizing CNC for point and linear control, achieving a positioning accuracy of ±0.01mm.
Types of CNC Vertical Drilling Machines: These include cross-table vertical drilling machines and turret vertical drilling machines.
Dual-Worktable CNC Drilling Machines: These machines feature two alternating worktables, overlapping machining time with workpiece loading/unloading time to enhance efficiency.
CNC drilling machines are widely used across various industries. In the IT sector, CNC drilling machines for printed circuit boards (PCBs) typically have 2–4 spindles for precise hole drilling on single, double, or multilayer PCBs. In large-scale industrial applications, CNC drilling machines are used for rough machining of large workpieces (e.g., hydroelectric turbine blades), where they perform matrix-intensive drilling to rapidly remove excess material before final shaping with CNC machining centers. This significantly reduces machining costs.
3. Advantages of CNC Drilling Machines
High Rigidity and Stability: Heavy cast iron machine bodies ensure minimal vibration, with precision machining accuracy reaching ±0.01mm.
X and Y Axis Separation: Reduces overall machine weight, enhances speed, and improves stability.
Multi-Spindle Design: Each Z-axis is independently driven.
Advanced Servo Motors: Transitioning from DC servo motors to AC servo motors for increased power and faster table movement.
Improved Position Feedback System: Moving from magnetic scales to optical encoders for higher resolution and stability.
Upgraded Guide Rails: Rolling guides are replacing air-bearing guides, offering superior rigidity and stability.
High-Speed Spindles: Air-bearing spindles can reach speeds up to 60,000 RPM.
Automatic Tool Management: Includes auto tool change and broken tool detection systems.
Drilling and Milling Capability: Equipped with row drilling functionality to perform milling operations as well.
Depth Control: Capable of blind hole drilling.
Deep Hole Drilling: Supports drilling depth-to-diameter ratios ranging from 1:10 to 1:20.
4. DUOMI CNC: A Leading Manufacturer of CNC Drilling Machines
DUOMI CNC is a renowned manufacturer specializing in CNC drilling machines. Their product lineup includes:
Micro-hole Drilling Machines
Thermal Friction Drilling Machines
Multi-hole Drilling Machines
Gantry-type Large-Scale Drilling Machines
Ultrasonic Drilling Machines
These machines are widely used in industries such as furniture manufacturing, automotive, aerospace, mechanical equipment, and aluminum processing. DUOMI CNC’s products are exported to over 40 countries worldwide, demonstrating strong manufacturing capabilities.
Compared to conventional drilling machines, CNC drilling machines offer superior precision, efficiency, and automation, making them indispensable in modern manufacturing industries. With continuous advancements in CNC technology, these machines will further enhance production efficiency and cost-effectiveness across various sectors.
