HEULE has introduced DEFA tooling, which provides a wide range of adjustment for chamfering operations in difficult-to-machine materials like Inconel, titanium, 4140 steel and others with large burr formation.
"Robust construction and an advanced dual-cutting system with exchangeable carbide blades enable front and back or back-only chamfering of bores from 4 mm to 36.2 mm (0.157 in. to 1.425 in.) to handle a wide range of machining requirements," said a company spokesperson. "Its unique blade geometry incorporates a sliding surface that enables chamfer cutting without compromising the integrity of the bore surface or interfering cross holes, ensuing surface quality. DEFA enhances precision and streamlines machining processes by eliminating the need for spindle reversal or workpiece indexing. This ensures precision and consistency even in the most demanding applications, such as longitudinal grooves, cross-bores and open bores with discontinuous cuts."
The DEFA tool compensates for surface variation, allowing constant chamfer sizes on unknown or cast surfaces. This versatility enhances efficiency, optimizes productivity and reduces set-up times, making it suited for chamfering applications on exotic materials such as Inconel, titanium, Hastelloy and other hardened materials. It is suited for shafts, compressor cases, landing gear components and other airframe structures and anywhere precision front and back chamfering of through holes is needed. Automotive applications such as planetary gears with multiple surface variations and burr formation can also benefit from DEFA technology.
This dual-cutting tool provides machinists with precise control over chamfer sizes across a range of on-tool adjustments, yielding flexibility to accommodate diverse bore dimensions and project specifications. Featuring an exchangeable carbide blade set with a material-specific coating, the DEFA tool is designed to deliver consistent and reliable performance in challenging machining environments.
How it Works
The DEFA tool operates by cutting a pre-adjusted chamfer diameter with precision regardless of where the surface of the part is located. Its design incorporates blades that maintain a predetermined setting for consistent chamfer diameters across workpieces. The design and construction of the DEFA blades enable machining in forward and reverse directions, enhancing versatility in manufacturing processes.
As DEFA blades engage with the material, the force applied through the feed onto the chamfer definition surface triggers radial retraction along the axis of the chamfered surface. This mechanism results in a gradual reduction in cutting width, allowing for precise control over the chamfer dimensions regardless of the height of the burr formation. The chamfer angle is determined by the angle of the definition surface, providing flexibility to adapt to diverse project requirements. Different chamfer sizes front and back can be pre-ground into special cutting blades.
A key advantage of the DEFA tool design lies in its ability to safeguard the integrity of the hole. The DEFA tool can produce chamfers up to .050" a side to produce a large chamfer before the thread or tap, creating a lead for the tap and helping ensure that the chamfer is larger than the OD of the thread during the chamfering process. This is achieved through the sliding surface geometry of the DEFA blades, which effectively mitigates the risk of damage and provides consistent surface quality.
For more information contact:
HEULE Tool Corporation
131 Commerce Dr.
Loveland, OH 45140
513-848-7235
info@heuletool.com