Paragon CNC Centerless grinding machines

Centerless Gríndíng Machínes
CNC seríes
NC seríes
H seríes (Hydrostatíc Bearíng G.W.)
B seríes (Ball and Roller Bearing R.W.)
s series (Hydrodynamic Bearíng R.W.)
E seríes

CENTERLESS GRINDING MACHINE
CNC/NC SERIES
Advanced Desígn Concept
CNC/NC Centerless Grínding Machines
Every PARAGON centerless grinding machine is designed and manufactured based on
the following management concepts: "Application of the newest technology and
innovation" ,"Endless improvement and progress" and "Customer satisfaction with
accuracy and quality".
The CNC series centerless grinding machines can be used for infeed grinding and
thrufeed grinding to ensure accuracy and high productivity in workpieces with diameters
between 1 mm and 50 mm.
The NC series centerless grinding machine features regulating wheel with ball and roller
bearing and achieves 0.1 μm grinding precision. The regulating wheel can rapidly
approach workpiece and then speed down while initiating grinding. The grinding wheel
comes with hydrostatic or hydrodynamic bearings for selection, and auto loading and
unloading device is optional.

Controller
FANUC(CNC)/MITSUBISHI(NC)
Minimal removal amount comes to ±0.0001 mm, and the rotational speed of
servo motor reaches a minimum of 0.01 mm/min while resolution achieves
0.0001 mm.
Equipped with infeed compensation and dressing position memory function, after
power failure or restart, there is detection of safety position to avoid clashes
between wheel and dresser.
Dynamic adjustment in infeed speed during grinding operation.
Compensation in workpiece dimension is dynamically corrected by adjusting the
offset value.
Manual Pulse Generator (MPG) hand wheel is used for easy tuning of the
contact point between workpiece and grinding wheel.
CNC - Complex mechanical machining can be programmed with high flexibility.
NC - Parameterized and simplified conversational interface that is easy for configuration.
Applícable lndustríes:
• Aerospace parts
• Medical applications
• Precision bearings
• High precision machine parts
• Hydraulic & Pneumatic systems
• Electrical / Electronic equipments
• Automotive & motorcycle parts,etc...
• Cutting tools

Unparalleked Quality Assurance and Control
The systematic development, production and assembly are carried out in a process oriented manner and in strict compliance with1s0 9001 directives.
PARAGON's O.C. staff conducts rigorous quality control throughout the entire manufacturing process brfore shipment. Our quality control process includes:
a) Stríct lncomíng Materíals lnspection.
b) Geometríc Accuracy lnspectíon.
c) Unloaded Spíndle Test.
d) Gríndíng Test.
Qualíty Assurance
Over and Over Agaín, PARAGON's Dedication to Quality Wíns Customer's Satísfactíon And Loyalty.
1n order to produce the highest quality & 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.

 KENNGROESSEN PROGRAMM P1
Rmax 0.72 μm
Rz 0.47 μm
Ra 0.040 um
• KENNGROESSEN
PROGRAMM P1
Rmax 0.71 μm
Rz 0.46 μm
Ra 0.041 μm
• KENNGROESSEN
PROGRAMM P1
Rmax 0.86 μm
Rz 0.43 μm
Ra 0.038 μm
7ιη•lυ1 ffóbлιııı
Cylinder P1ane
Cylínder-SHR1 RAM-1-U
Reanalysís Requíred
10/06/2008 13:54:59
Cylinder 330-03
360° /Admìn/PARAGON
10/06/2008 13:54:46
Specífícatíon
Reference Type LS Cyiinder
Fílter Type 2CR
Filter Range 1-50upr
Datum Se1f
Parameters
RONp -0.09 μm
RONp Pos 89•9 °
RONv 0.33 μm
RONvPos 16•0 °
RONt 0•24 цm
Dífference Runout 0•24 μm
delta FF0.15pm Condítíons
delta Theta45.0° Zposítíon 49.999 mm
- 25.004
Rposítion
Attitude
Contact Direction
56.919 mm
Vertícal
R Negatíve

GRINDING WHEEL SPINDLE BEARINGS
Hydrostatíc Bearíng Seríes (H seríes)
Economіcal Seríes
Unique Design
Hydrostatic bearings of the grinding spindle are surrounded by high pressure oil film, eliminating metal-tometal contact, overheating, nooil leakage since no oil seals are utilized, providing less power consumption, high rigidity and high vibration damping performance.

Fine hand scraped hydrodynamic bearings made of steel and phosphor bronze alloy with oil lubrication, firmly maintain grinding spindle high precision rotation and rigidity to stand heavy duty grinding in a minimum gap.

REGULATING WHEEL SPINDLE BEq,ВіNGS ~
Ball And Roller Bearíng Seríes (B series)
No Flange, No Deflection
The innovative advanced regulating wheel spindle does not require a flange and utilizes
precision angular contact bearings, and ball and roller bearings with dual-end supportsthat
firmly maintain spindle super precision rotation and rigidity

G.W. Spíndle Comparison Chart (for high-speed)
PARAGON Hydrodynamic bearing Hydrostatic bearing (H)
Friction coefficient 0.001 - 0.008mm < 0.001 mm
Rotation speed Medium speed All types of speed, great stability is demonstrated
specially in low and high speed
Loading capacity General High
Rotation precision General Good
Life-expectancy Short Above 10 years
Cost - Higher
R.W. Spíndle Comparison Chart (for low-speed)
PARAGON Hydrodynamic bearing Ball and roller bearing (B)
Rotation speed Medium speed Low to medium speed
Rotation precision Roundness and size are unstable Maintains good roundness and stable
during low speed size during low speed
Spindle support single-end support Dual-end support
Friction coefficient 0.001 - 0.008mm 0.001 - 0.003mm
Type and size No standardization Standardized
Maintenance Hard to adjust, complex and specífic Easy to adjust, durable, simple
technical maintenance maintenance
Replacement cost High Medium
Cost - Higher

The machine base is manufactured from high quality Meehanite cast iron, 1ow center of gravity, featuring rigidity over 108N/m and natural
frequency over 150 Hz and analyzed by advanced Finite Element Method (FEM). A1ong
with vibration stress release, these outstanding structural features assure high strength, maximum damping capability and longer servíce life.
The C1 class ballscrews feature hydrostatic lubrication, low friction coefficiency, and pretensioned for increased rigidity and high positioning accuracy, providing minimum feeding accuracy in 0.1μm (For CNC and NC Centerless Grinding Machine)

Guídeways
• Machine Base has extra wide V guideways with great span in
between and high frequency hardened surfaces, exhibiting
outstanding stability during grinding operation.
• In combination with fine hand scraped slideways, the axis movement guarantees high accuracy and maximum durability.
Both grinding wheel and regulatng wheel spindles are made of high quality alloy steel (SNCM-439) and treated through: normalized, tempered, carburized hardening and then sub-zero treatment Then follows the precision grinding process: rough grinding, semi-finish grinding, finish grinding and lapping. The lapping process assures superior surface finish and greatly enhances spindle life and stability guaranteeing deformation free performance
throughout its durable service life.

ACCESSORIES
Convenient Control & Customízed Automatíon
Pressure Swítch (Standard)
Safety feature integrated with grinding wheel spindle lubrication system so that the spindle
motor won t rotate until pressure is reached.
This prevents the spíndle from dry running and getting damaged.
Dresser for Regulatíng Wheeд and
Gríndíng Wheel (Standard)
The dressing unit is hydraulic traversed, with adjustable speed. Dressing slides are made of
special alloy cast iron and hand scraped.
Regulatíng Whee1 Servo Motor
(S, B and H Seríes)
Provides infinite variable speed change.
This can reduce vibration during grinding and consequently achieve the best results.
Rotary-type Dressíng Unít (Optíonal)
Two type of Rotary Dressing Unit can be supplied. One type is with small diamond wheel for
dressing of normal grinding wheel. Another type is with small aluminum oxide wheel for truing the surface of new diamond grinding wheel to enhance grinding accuracy.
Automatíc Loadíng and Unloading
Attach ment(optíonal)
Fully automatic grinding operation that saves labor while enormously upgrading production
efficiency
lnverter for Grínding Whee1 Spíndle
Multi-step variable speed change in the G.W.
allows easy testing to enhance grinding efficiency and precision level. When G.W. is wearing out, it maintains constant peripheral speed, cutting efficiency and surface precision through the controller. Gradual activation and halt avoid Automatic lnfeed Attachment
affecting life-expectancy of hydrostatic spindle (Optional) and eliminate strident noise caused by belt.

To meet increasing demands for Automation, various auto. Loading & unloading attachments can be designed for thrufeed grinding of round tubes, shafts and bars. The attachment is suitable for mass production. With the attachment, dependence on operator and production cost can be reduced
consequently. This fully automatic attachment is a great help for increasing production volume.

For components with heads, shoulder and multi diameters, different types of auto loading & unloading attachment for infeed grinding can be designed
according to different shape and length of component.
This fully automatic attachment can not only reduce operator error and save labor cost but also enhance production efficiency.

CNC Series: The ball and roller bearings for R.W. spindle instead of hydrodynamic bearings and servo motor for R.W., providing infinitely variable speed.
3-6 axes for G.W.dressing, R.W. dressing and R.W. infeed compensation.
NC Series: 1-2 axes for G.W.dressing and R.W. infeed compensation.
Design and specifications are subject to change without prior notice.

1 AX1S
Regulating wheel upper slíde or lower
slíde auto lnfeed
4 AXES
X: Grinding wheel auto dressing (vertícal)
Z: Grinding wheel auto dressing (horízontal)
C: Regulatíng wheel upper slide auto infeed
Y: Regulating wheellower slide auto infeed
and compensation.
2 AXES
X: Grindíng wheel auto dressing (vertical)
Y: Regulating wheel lower slide auto
infeed and compensation.
5 AXES
X: Grinding wheel auto dressing (vertical)
Z: Grindíng wheel auto dressing (horizontal)
A: Regulating wheel auto dressing (horizontal)
C: Regulating wheel upper slide auto infeed
Y: Regulating wheellower slide auto infeed and compensation.

3 AXES
X: Grinding wheel auto dressing (vertical)
Z: Grinding wheel auto dressing (horizontal)
Y: Regulatíng wheellower slide auto infeed and compensation.
6 AXES
X: Grindíng wheel auto dressing (vertical)
Z: Grinding wheel auto dressing (horizontal)
A: Regulating wheel auto dressing (vertical)
B :Regulating wheel auto. dressing
(horizontal)
C: Regulating wheel upper slide auto infeed
Y: Regulating wheel lower slide auto infeed
and compensatíon.

CNC seríes (B or B+H)
■ RC-12CNC
■ RC-18CNC
■ RC-20CNC
■ RC-1812CNC
• NC series
■ RC-12NC
■ RC-18NC
■ RC-20NC
■ RC-1812NC
• H seríes
■ RC-18H
■ RC-20H

• B seríes
■ RC-12B
■ RC-16B
■ RC-18B
■ RC-20B
■ RC-1812B
• S series
■ RC-12s
■ RC-18s