The thermal friction drilling and tapping process for Bitcoin mining manifold distributors involves chipless machining using a high-temperature friction drill, completing both the drilling and thread tapping operations in one continuous cycle. This method ensures clean, precise, and durable thread formation suitable for heat exchange and fluid distribution components.
Application of Thermal Friction Drill Bit
The DUOMI CNC thermal friction drilling and tapping machine adopts a high-temperature, chipless extrusion technique that allows efficient hole forming on thin-walled metal materials used in Bitcoin mining manifold systems.
By generating localized heat through rotation and pressure, the process plastically forms a reinforced bushing around the hole, followed by an integrated tapping operation.
This technique is ideal for precision manufacturing in fluid distribution pipelines, cooling modules, and other heat-dissipating components.
Recommended Equipment
1. CNC Thermal Friction Drilling and Tapping Integrated Machine
This integrated model supports automatic tool change and multi-axis linkage, allowing multiple operations such as drilling and tapping to be performed in a single setup.
It provides exceptional efficiency in continuous production environments.
For example, the CNC automatic tool-changing drilling–milling–tapping center designed for wind energy, logistics, and automotive aluminum profiles is capable of handling square tubes, round pipes, and fiberglass-reinforced profiles with complex geometries.
Price Range: ¥150,000 – ¥288,000 (depending on configuration and functionality).
2. Multi-Spindle Drilling Machine
This model is suitable for batch production with identical hole layouts, enabling synchronous multi-spindle operations that significantly increase productivity.
However, it is less flexible for irregular or customized workpieces compared with the CNC integrated models.
Supporting Tools and Accessories
High-performance tooling ensures long-term machining stability and precision:
Tungsten carbide friction drill bits
Titanium-coated extrusion taps (TiN/TiAlN)
Accessory Cost Range: ¥135 – ¥1,850 depending on size and coating type.
Machining Accuracy Requirements
Thermal friction drilling and tapping for Bitcoin mining manifolds must meet tight tolerances and high functional standards, as summarized below:
1. Dimensional Accuracy
The inner diameter tolerance of the formed bushing is typically controlled within IT7–IT8 precision grades.
IT7 tolerance ≈ 0.015–0.025 mm
IT8 tolerance ≈ 0.025–0.039 mm
The thread accuracy after tapping must comply with ISO metric thread standards, typically with 6H (internal) or 6g (external) tolerance bands.
Pitch deviation should not exceed ±0.01 mm.
2. Geometric Tolerances
Hole straightness: ≤ 0.05 mm per 100 mm
Perpendicularity deviation: ≤ 0.1 mm (critical for ensuring the sealing of fluid connections in the manifold).
Bushing wall thickness uniformity: deviation ≤ ±0.05 mm, to prevent thread breakage during tapping.
3. Surface Quality
Hole surface roughness (Ra): ≤ 3.2 μm
Thread surface roughness (Ra): ≤ 1.6 μm
→ Ensures minimal fluid resistance and corrosion protection.
The thermal process should avoid oxide layer residue; this can be mitigated through nitrogen shielding or post-process polishing.
4. Process Control Parameters
Equipment Selection:
A CNC machine with a main spindle speed ≥ 8,000 rpm is required to maintain frictional contact temperatures between 800–1000°C.
Parameter Optimization:
Feed rate: 0.1–0.3 mm/rev
Hole depth: 2–5 mm
→ Prevents deformation of thin-walled components.
Inspection Methods:
CMM (Coordinate Measuring Machine) for verifying thread pitch diameter.
Laser interferometer for detecting positional accuracy and hole alignment.
CNC Thermal Friction Drilling and Tapping Result on Condenser Tubes
5. Material Adaptability
For manifolds made from aluminum alloys or stainless steel, adjustments are required:
Use TiAlN-coated friction drills to resist adhesion and wear.
Reduce spindle speed by 10–20% to minimize material sticking and thermal buildup.
Conclusion
Thermal friction drilling and tapping for Bitcoin mining manifold distributors demand a delicate balance of IT-grade dimensional accuracy, geometric tolerances, and surface integrity.
By optimizing process parameters and selecting appropriate CNC equipment—such as the DUOMI CNC thermal friction drilling and tapping center—manufacturers can achieve high-efficiency, stable, and burr-free production.
Choosing specialized friction drill bits, precision extrusion taps, and the right CNC configuration ensures consistent quality and long service life of critical heat dissipation components in cryptocurrency mining systems.
