HS-156 Grinding System

Example Application #1 — HIP BROACHES

Some hip broach designs have spiral or annular cutting teeth requiring a specific profile on the grinding wheel. Chip breakers are then added with a different profile wheel, thus requiring the use of two different grinding wheels. The Huffman wheel changer enables the user to design the process with single wheels rather than wheel packs. Doing so eliminates the engineering required to avoid interference conditions associated with wheel packs with multiple grinding wheels.

Example Application #2 — FEMORAL KNEE IMPLANTS

Grinding wheels can access much of the articulating surface of a femoral implant. Some geometry, particularly between condyles, is difficult if not impossible to reach with 6" - 8" diameter grinding wheels. The wheel/tool changer enables automatic changeover from grinding wheels to smaller diameter milling cutters which can access difficult-to-reach areas of the workpiece. Similarly, the wheel changer enables automatic changeover from an aggressive, course-grit roughing wheel to a finer-grit finishing wheel, thereby reducing the number of down-stream belting and polishing operations.

Total Travel (Axes Under CNC Control)

X-Axis (Main Base Slide): 16"/406 mm
Y-Axis Slide: 16"/406 mm
Z-Axis Slide: 16"/406 mm
A-Axis Rotary: 360°
B-Axis Rotary: 90°
C-Axis Rotary: +35° to -145°

Grinding Spindle (*Other Speed Ranges Available)

Wheel Spindle Range: 4000-8000 rpm*
Wheel Diameter: 6-8"/152-203 mm
Spindle Power: 15 hp*/37,3 kW*

Feed Rates

X, Y, Z Linear Axes: 0-393 ipm/0-10 mpm
A-Axis Rotary: 150 rpm
B-Axis Rotary: 3.33 rpm
C-Axis Rotary: 3.33 rpm

Programming Resolution

Linear Axes: 0.0001"/0,001 mm
Rotary Axes: 0.001°

Positioning Accuracy & Repeatability (Scale Feedback)

Linear Axes Accuracy: ±0.0001"/ft / ±0,008 mm/m
Linear Axes Repeatability: 0.0001"/ft / 0,008 mm/m
Rotary Axes Accuracy: ±36 arc sec
Rotary Axes Repeatability: 36 arc sec
Rotary B-Axis Accuracy: ±15 arc sec
Rotary B-Axis Repeatability: 15 arc sec

Weight & Dimensions

Total Weight: 16000 lbs/7260 kg
Floor Area**: 92.5 sq. ft. / 8,8 sq m
Overall Height: 97"/2,5 m
Floor to Centerline of Workholder: 48"/1,2 m

**machine only, excludes coolant system and wheel/tool changer

Stress-relieved cast iron machine base
Digital AC brushless servo drive systems
Motor encoders on all axes
Single wheel hub
Oil-based coolant capacity
Metric design and hardware

Software Options

Automotive, aerospace and energy components
Medical components: broaches and reamers
CAD/CAM compatibility with Huffman or 3rd-party post-processors

Grinding Spindle Options

Multiple wheel hub configurations
Quick-change wheel hubs
Wheel balancing
Other spindle motor power
Variable speed

Coolant System Options

100-500 psi (7-35 bar)
Water-soluble coolant compatibility
Filtration: paper, centrifuge, DE and others
Temperature-controlled
Mist exhaust filtration
Spray washdown system

Control Options

GE Fanuc
Huffman PC-Based OAC

Workholding Options

EROWA, 3-R
HSK, CAT, collet, arbor-style tooling, tailstock with centers, steady-rests, quick change pallets

Other Options

Rotary truing device