Is UHPC Panel Drilling Prone to Cracking? Qinglong UHPC Drilling Technical Guide

UHPC panels are not prone to cracking during drilling under proper operating procedures, but parameters must be strictly controlled: drilling speed 300-500rpm, feed rate 20-40mm/min, use of diamond thin-wall drill bits (water-cooled), and hole edge distance ≥50mm. Through its specialized drilling process, Qinglong UHPC achieves hole diameter deviation ≤0.5mm with complete hole edges free of chipping.

In terms of anti-cracking technology, Qinglong UHPC has summarized key control points: select diamond thin-wall drill bits (wall thickness 1.2-1.5mm) with water pressure ≥0.3MPa for continuous cooling; position holes ≥50mm from panel edges and ≥100mm from adjacent holes; add spacer boards between panels when drilling stacked layers. Testing shows that UHPC panels drilled with this process exhibit no change in microhardness around holes and no microcracks. In contrast, comparative specimens without water cooling or with excessive rotational speed showed radial cracks around holes.

Drill Bit Selection Criteria

Diamond thin-wall drills with wall thickness 1.2-1.5mm; drill bit diameter deviation ≤0.1mm; these standards ensure drilling quality.

Machining Parameter Optimization

Rotational speed 300-500rpm to avoid overheating; feed rate 20-40mm/min with steady advancement; these parameters prevent cracking.

Cooling System Requirements

Water pressure ≥0.3MPa for sufficient cooling; water flow ≥5L/min to carry away debris; these requirements reduce thermal stress.

Hole Position Design Specifications

Hole edge distance ≥50mm to avoid stress concentration; hole spacing ≥100mm to ensure strength; these specifications prevent cracking.

Drilling requires professional craftsmanship. Qinglong UHPC's mature technology ensures machining quality.