The HRG Junior provides a quality machine tool to the CVJoint
rebuilder that will reduce operating costs, improve product
quality and have excellent reliability.
Benefits
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Robust construction
Value engineered package derived
from the highly successful HRG2000
Uses CBN plated grinding wheels
Grinds radial & dual arc (Honda)
track profiles
Powerful 7.5KW, chiller-cooled,
grinding spindle with max speed 45,000 rpm
Spindle overload protection
High pressure, temperature
controlled, dual filtered, mineral oil coolant system
Simple parameter programming
Small footprint
Full enclosure with safety
interlocked access door
Oil mist extractor
Productivity (at 100%)
Housing
Race
34 per hour
30 per hour
Changeover
Housing to housing
Housing to race
Race to race
Wheel change
10 minutes
20
minutes
10 minutes
10 minutes
Specification
The HRG Junior is a
3-axis CNC machine tool, specifically designed to grind a round
form track in the full range of CVJoint Housings and Races using
CBN plated grinding wheels. Both standard and UF (Honda) style
track profiles can be ground. It is derived from the highly
successful HRG2000 and incorporates many of the features that
make this machine an industry leader.
The
main elements of the machine are arranged on a strong, rigid,
steel base, as follows
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Machine Bed
A highly rigid one-piece casting that supports all working
assemblies. The bed-base interface includes a special
membrane to dampen vibration.
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Wheelhead
Features a 7.5 KW high frequency, chiller-cooled grinding
spindle with infinitely variable speed up to a maximum of
45,000 rpm. The spindle is held horizontally in a cast iron
housing set on a slideway system giving two axes of linear
movement (X & Z) to the grinding wheel relative to the
workpiece. Radial and UF track profiles are achieved by CNC
interpolation of the X and Z axes.
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Workhead (C axis)
Features a purpose designed precision rotary axis driven by AC
servomotor through a high ratio harmonic reduction drive unit
for the elimination of backlash and indexing error. It is under
full CNC control with 0.001º resolution.
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Workholding
For Housings a three jaw self-centring chuck is used in
conjunction with a universal orientation/loading device.
(Optional collet chuck available). For Races a mandrel and a
range of expanding sleeves is used with an in-machine
orientation device.
Other features include
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User friendly GE
Fanuc 0i CNC with 2-year warranty
Rigid slideways incorporating double sealed linear ways and
servo motor driven, large diameter ballscrews
Axes positioned by battery backed absolute encoder feedback
(no homing procedures!)
One-piece, easy access enclosure
Bed-base interface includes a special membrane to dampen
cutting forces
Dimensions
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Machine:
Width 85cm (33"), Length 200cm (79"), Height 160cm (63")
Coolant System: Width 89cm (35"), Length 142cm (56"),
Capacity 236 litres (65 gallons)
Floor Plan: Total space requirement for machine, coolant
system and chiller units for grinding spindle and coolant is
213cm x 244cm (7ft x 8ft)
Weight: 1260 Kg (2770lbs)
