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A Down-The-Hole (DTH) drill bit is the critical interface between machinery and rock. Positioned at the base of the DTH hammer, it operates deep within the borehole, receiving high-frequency, direct impacts from the piston. By synchronizing high-energy impact, constant rotation, and efficient cuttings removal, it achieves superior rock fragmentation.
Unlike top-hammer systems, DTH technology delivers compressed air through the drill pipe to a hammer located at the bottom of the hole. This drives the piston to strike the bit tail directly, virtually eliminating the mechanical energy loss typically seen in long-drill-string transmissions. Under the combined forces of high-frequency impact, axial pressure, and rotary shearing, the DTH bit becomes the ultimate determinant of penetration rates, borehole straightness, and total operational cost.
①Flat Face: Engineered for extreme abrasiveness and ultra-hard formations. The flat profile distributes impact loads evenly across all carbide inserts, preventing premature failure caused by localized stress.
②Convex Face: The specialist for soft to medium-hard rock. The outward-bulging center initiates micro-cracking upon first contact, allowing the peripheral teeth to shear through the weakened rock with maximum speed.
③Concave Face: The global industry standard for versatility. Its inward-curving profile creates a self-centering effect that guides shockwaves along the central axis, ensuring exceptional verticality across diverse conditions.
④Drop Center: The solution for unstable ground. A reinforced evolution of the concave design, the deep stepped center maintains hole integrity and straightness in complex, fractured, or highly heterogeneous formations.
⑤Double Gauge Row (DGR): The ultimate wear-resistance upgrade. Designed for large-diameter bits and the most punishing abrasive environments.
Hengpu DTH bits are fully compatible with industry-leading platforms, including Sandvik, Epiroc, Caterpillar, Bauer, XCMG, and SANY.
DTH drill bits are suitable for: mining, infrastructure construction and pile foundations, underground mines and tunnels, hydrology and geothermal engineering, and special projects, etc.
In extreme drilling environments, over 60% of DTH bit failures are attributed to 'steel wash'—the severe erosion of the matrix material by rock cuttings. This phenomenon causes carbide inserts to lose critical support and detach prematurely, even while their cutting potential remains intact. To resolve this industry-wide challenge, we have pioneered the use of 3D laser ceramic cladding. By integrating a high-performance metal-ceramic composite coating onto critical high-wear zones—including flushing grooves, gauge wings, and insert necks—we provide an armored shield that redefines bit longevity.Our patented innovation lies in the 3D laser-printed ceramic wear-resistant layer.
Advanced Material: Achieving a remarkable hardness of 68-70 HRC.
Superior Bonding: Utilizing a breakthrough metal-ceramic atomic bonding technology, the layer forms an exceptionally tight bond between the tip and shank. This significantly reduces wear at the critical junction point.
Enhanced Durability: The wear-resistant layer excels on hard geology, offering outstanding abrasion resistance.
By integrating 3D laser ceramic printing technology, the erosion and wear resistance of down-the-hole drill bits has been improved by orders of magnitude.
This ceramic reinforcement layer is not only wear-resistant but also possesses excellent corrosion resistance, effectively preventing stress corrosion cracking of the substrate in water well drilling involving acidic underground water.
Hengpu products have a lifespan more than ordinary products, effectively reducing the number of gear replacements and machine downtime, thereby significantly reducing the total operating cost of the entire project.
Hengpu is a pioneer in industrial wear resistance technology. We have overcome the long-standing industry challenge of balancing extreme hardness with exceptional toughness.
Technical Breakthrough: Our proprietary process solves the interface bonding difficulties between ceramic particles and the metal matrix. This enables 3D printing of wear layers using over ten types of ceramics (including Al₂O₃, ZrO₂, and SiC) with thicknesses up to 4mm.
Optimized Design: The laser-printed layer features 3D raised and recessed structures that ensure even surface wear distribution, precisely matching the designed service life.
Quality Assurance: The entire manufacturing process adheres to stringent international standards, with each tool certified under ISO9001:2008 and GJB9004B-2009 to guarantee stability and reliability.
Innovative Bionic Design: Inspired by pangolin scales, our proprietary wear-resistant technology creates a bionic structure where the ceramic layer fuses deeply (≥1mm) with the substrate. This represents a significant leap forward in material science.
Perfect Hardness-Toughness Balance: The atomic bonding technique merges the hardness of ceramics with the toughness of metal, delivering unparalleled performance, especially on hard geology.
Customizable Solutions: Available in various models.
High-Temperature & Abrasion Resistance: The laser-printed ceramic layer withstands high temperatures and severe abrasion, extending tool life and ensuring superior performance in the most demanding construction environments.
Rapid & Reliable Supply: Manufactured in mature industrial workshop systems to ensure fast delivery without compromising on strict quality control.
Q: What is Hengpu Laser's background?
A: Hengpu Laser is a high-tech company founded in 2013 by a team of US-educated PhDs.
The founder, Dr. Liu Dejian, conducted extensive welding research at Ohio State University and has published numerous articles in international journals.
The company is a leader in China's ceramic 3D printing sector, specializing in the industrialization of industrial laser 3D printing technology. Recognized as a national-level "Specialized, Refined, and Unique" (Little Giant) enterprise.
Hengpu has successfully developed over 30 products for mining, subway tunnels, oil exploration, and infrastructure, establishing itself as a rapidly emerging brand in engineering cutting tools.
Q: What is the thickness of the wear-resistant layer?
A: Our 3D-printed ceramic wear-resistant layer can be up to 4mm thick, providing exceptional wear resistance.
Q: Do you offer custom services?
A: Yes, we provide personalized solutions tailored to your specific equipment and working condition requirements.
