Paragon CNC universal cylindrical grinding machines

Paragon Uníversal Cylindrícal Gríndíng Machínes CNC seríes
NC Seríes
Economícal Seríes
CE
UNIVERSAL CYLINDRICAL GRINDING
MACHINE CNC SERIES
Max. Gríndíng Wheel: Perípheral Speed 45m/s
Uníque PARAGON Hydrostatíc Bearíngs Assembled with
Grínding Wheel Spíndle
The GU series are compact universal cylindrical grinding machines by PARAGON, and can achieve up to μm positioning accuracy. They are suitable for long, multi-steps, and profile cylindrical grinding. Along with the optional internal grinding unit attachment, they provide more flexibility and offer the best choice for your needs. The main features are :
Grinding wheelhead spindle with unique hydrostatic bearings.
Multi-function, high roundness workhead.
Hydraulic and manual adjustable tailstock.
Highly rigid machine base with hydrostatic lubrication on guideways.
X and Z-axes have high torque servo motor directly coupled to
the class 01 ballscrew. Ø 40mm

Controller
The GU-3250CNC Polygon
Grínder
GU-3250CNC Polygon Grinder is the ultimate
design for both eccentric and non-round grinding. lnfeed movement in nanometer by fanuc 31 i controller with feed-backs to controller from the
angle encoder in C-axis. Applications include eccentric grinding, camshaft grinding and crankshaft grinding etc.
Polygon Workpiece
Rexroth MTX Mícro
~ PARAGON CNC series universal cylindrical grinding machines, each with a color screen have the latest technology in digital control systems.
\/ Powerful processor can shorten CNC and PLC processing time.
\/ Compact multi-server drive, which adapting smaller installing space and
showing high processing accuracy.
V Paragon's self-developed CAD/CAM software can get users start quickly
with its rapid NC program output and conversational input interface.
Applícable lndustries:
• Aerospace parts
• Medical applications
• Precision bearings
• High precision machine parts
• Hydraulic & pneumatic parts
• Electrical / Electronic equipments
• Automotive and motorcycle parts
• Cutting tools

Unparaiieied Quality Assurance and Control
The systematic development, production and assembly are carried out in a process oriented manner and in strict compliance with ISO 9001 directives.
PARAGON's Q.C. staff conducts rigorous quality control throughout the entire manufacturing process before shipment.
Our quality controi process íncludes: a) Strict lncoming Materials lnspectíon; b) Geometric Accuracy lnspection; c)
Unloaded Spindle Test and d) Grinding Test.
Quality Assurance
Over and Over Again, PARAGON's Dedication to Quality Wins Customer's satisfaction and Trust.
In order to produce the highest quality and value-added products, PARAGON has invested a great amount in purchasing up-to-date and sophisticated automatic manufacturing equipments and measuring devices, including a CNC Horizontal
Machining Center, Roundness Measuring lnstrument, Roughness Measuring lnstrument, Coordinate Measuring Machine, etc., and a nearly 23,000 square meter air conditioned plant, all of which is to provide a controlled environment
and to improve the quality assurance.

The wheelhead is driven through Vshape belts by a powerful motor (5 or 7.5HP) to achieve peripheral speed 45m/s. Equipped class C1 ballscrew ( Φ 40mm) and Heidenhain sub-jim linear scale with full closeloop feedback. Overall, the machine achieves ± 0.5 um repeatability accuracy.
The compact wheelhead enables external and optional internal grinding of workpieces in the same setup, providing more flexibility. The
internal grinding spindle is driven by 1 HP motor.

Hydrostatíc Bearíngs
• PARAGON'5 unique design for accuracy assurance features: (a)
no metal to metal friction (b) no overheat and no deformation © no oil leakage as no oil seal is installed.
• Equipped with a hydraulic and lubrication system with independent temperature control, providing minimum thermal displacement effect.

Hydrostatíc Guídeways
• Hand scraped and features an oil lubrication system which reduces
the metal friction and guarantees constant high accuracy.
• Equipped with a hydraulic and lubrication system with independent temperature control, providing minimum thermal displacement effect.
Spíndle
The grinding wheel spindle is made of high quality alloy steel
(SNCM-439)and treated through: normalized,tempered, carburized
hardening and then sub-zero treatmant.Then follows precision
grinding processes: rough grinding,semi-finishgrinding, finish
grinding and lapping process assures superior surface finish and greatly enhances spindle life and stability and deformation free performance throughout its durable service life.
The workhead's rigid design,
driven by servo motor, features reliable and precise operation.
NN roller bearings and angular contact bearings in the workhead spindle reduce edge stress and friction, improving concentricity and surface finish of workpieces. The table is enabled to swivel between30° (clockwise)--90° (counterclockwise)
Sensor
This technology optimizes the grinding processes:
• Rotation rpm monitoring.
• Belt status indication. Alarm will be activate if belt is broken.
• Easy loading and unloading of workpieces to reduce set-up time.

Belt Tension Adjustment
Used to assure transmission. full power
The workhead's rigid design, driven by servo motor, features reliable and precise operation.
NN roller bearings and angular contact bearings in the workhead spindle reduce edge stress and friction, improving concentricity and surface finish of workpieces.
The table is enabled to swivel between30° (clockwise)--90°
(counterclockwise)
Spíndle Nose
Workhead can be equipped with rotary cylinder, chuck and fixture applications for easier grinding of various workpieces.

The rìgid taílstock ís equípped with hydraulic actuated barrel
retraction by foot paddle and manual handle for easy workpiece loading and unloading.
It is designed for the use of
M.T.4 taper centers.
Center pressure can be adjusted for high precision which is required for small and thin workpieces.
Unique fixed-type wheel dresser featuring constant coordinate positíon without calibration. Diamond dresser holder mounted beside tailstock. (Optional)

Mícro Taper Adjustment (Optíonal)
The fine adjustment makes the taper correction in the range
below 1 μm possible when grinding between centres.
Air 1mpulsíon
Tailstock equipped with air inlet for easy manual movement.
The rìgid taílstock ís equípped with hydraulic actuated barrel
retraction by foot paddle and manual handle for easy workpiece loading and unloading.
It is designed for the use of
M.T.4 taper centers.
Center pressure can be adjusted for high precision which is required for small and thin workpieces.
Unique fixed-type wheel
dresser featuring constant coordinate positíon without calibration. Diamond dresser
holder mounted beside tailstock. (Optional)
Table Taper Correction Devíce
The fine adjustment makes the finest table taper correction possible.

The machine base is manufactured from high quality Meehanite cast
iron, with 1ow center of gravity, featuring rigidity over 108 N/m and natural frequency over 150 Hz, analyzed by advanced Finite
Element Method (FEM). Along with vibration stress release, these
outstanding structural features assure high strength, maximum damping capability and longer service life.

Class C1 Ballscrews
Features hydrostatic lubrication, low friction coefficiency, and is pretensioned for increased rigidity and high positioning accuracy, providing minimum feeding accuracy in 0.1 μ m.
Guídeways
Machine Base with extra wide V and Flat guideways on base combined with great span in
between exhibit outstanding stability during grinding operatíon.
The machine base is manufactured from high quality Meehanite cast iron, with low center of gravity, featuring rigidity over 108 N/m and
natural frequency over 150 Hz, analyzed by advanced Finite
Element Method (FEM). Along with vibration stress release, these
outstanding structural features assure high strength, maximum
damping capability and longer service life.
Hand-Scrapíng
Extra fine hand scraped over the entire contact surface of guideways and an oil lubrication system guarantee high accuracy and maximum durability for axes movement.

ACCESSORIES
Optímízed Performance and Customízed Automatíon

Touch Probe (CNC Seríes Optional)
The reliable touch probe can quickly and accurately detect the end face position on
workface, reducing idle time and boosting productivity. 
Gap Elímínator / Crush Control
(CNC Seríes Optíonal)
You can get both or one of the devices according to function and needs; Gap Eliminator: signal detection of G.W. and workpiece contact, rapidly approaches workpiece for grinding to save time.
Crush Control: This device will automatically detect the setting up or machining condition.lf any abnormal condition occurs, tł grinding wheel will rapidly retract for safety.
Automatíc ín-process Gauge
(CNC Seríes Optional)
This device automatically and continuousiy measures the workpiece being machined and
compares the actual size to pre-set values, bringíng the workpiece to the accurate dímensíon
Rotary-type Dressíng Unít
(CNC Seríes Optional)
Two types of Rotary Dressing Unit can be supplied. One type is with small diamond wheel for dressing of normal grinding wheel. One type is with small aluminum oxide wheel for truing the surface of new diamond grinding wheel to enhance grinding accuracy.
lnverter for Gríndíng Whee1 Spindle
(CNC Seríes Optíonal)
Multi-step variable speed change in the G.W.
allows easy testing to enhance grinding efficiency and precision level.When G.W. is earing out, it maintains constant peripheral speed, grinding efficency and surface precision through the controller. Gradual activation and halt avoid affecting life-expectancy of hydrostatic spindle and eliminate strident noise caused by belt.

GRINDING EXAMPLES
Face Gríndíng
Grinding a face with workhead set 90 degrees from an ordinary position.
Traverse Grinding
Automatic intermittent infeed and hydraulic table-traverse for efficient traverse grinding jobs.
Plunge Gríndíng
Automatic infeed allows excellent results in short face grinding.
Shoulder Grinding
Grindïng diameter and adjacent shoulder on a workpiece held
between centers in a single infeed.
Taper Gríndíng
Grinding a tapered workpiece held between centers or by chuck. Table is easily swiveled for this operation.
lnternal Gríndíng (Optíonal)
Grinding an internal diameter with a hinged type lnternal Grinding
Attachment.

UNIVERSAL CYLINDRICAL GRINDING MACHINES
GU-3250 / GU-3275 / GU-32100
♦ Swing Over Tab1e: 320mm
♦ Max. Load Held Between Centers:150kg
♦ Grinding Wheel Peripheral Speed: 33m/sec
♦ Max. Workpiece Diameter to be Ground: Ф 280mm
♦ Distance between Centers: 500mm/750mm/1000mm
♦ Touch-sensing Screen PLC lnterface

MACHINE LAYOUT
GU-32NC/P/S Series
GU-32CNC Series
GU-2020C NC
GUH-35CNC Series

Mícro feed dresser holder
Hydraulic form dressing attachment
(mounted on wheelhead)
Scroll 3-jaw chuck with black piate

Wheel balancing stand & arbor

Electrícal cabinet air cooler
Dynamic wheel balance device
Tailstock-mounted dresser holder Workpíece holder

Angular dresser holder

Adjustable 2-poínt steady rest
Magnetic coolant separator
lnternal gríndíng attachment
Grindíng wheel replacement device

Radíus dresser holder
Adjustable 3-poínt steady rest
Cam-locked driving dog
Papeг fílter
Workpíece chucked índícator device

•CNC seríes
 GU-2020CNC
 GU-3250CNC
 GU-32120CNC
 Ultra GU-3550CNC
 SuperB GU-35100CNC
 GUH-3540CNC (Heavy-Duty)
 GUH-3580CNC (Heavy-Duty)
 GUH-35100CNC (Heavy-Duty)
 GUH-35150CNC (Heavy-Duty)
• NC seríes
 GU-3250NC
 GU-3275NC
 GU-32100NC

• P series (Hydraulíc Driven Auto Feed)
 GU-3250P
 GU-3275P
 GU-32100P
• S series (Hand Feed)
 GU-3250S
 GU-3275S
 GU-32100S