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Centerless Grinder

NC Centerless Grinding Machine

ECG NC Series

Grinding Applications

Thrufeed grinding
Thrufeed grinding
Thrufeed grinding
Thrufeed grinding
Infeed grinding
Infeed grinding
Infeed grinding
Infeed grinding
Infeed grinding
Infeed grinding
Infeed grinding
Infeed grinding
Infeed grinding
Infeed grinding
Infeed grinding
Infeed grinding
Infeed grinding
Infeed grinding

Control Axis Diagram

1 Axis<br> Z Axis: Upper or lower slide movement
1 Axis
Z Axis: Upper or lower slide movement
2 Axes<br> X Axis: Grinding wheel dressing <br> Z Axis: Lower slide movement
2 Axes
X Axis: Grinding wheel dressing
Z Axis: Lower slide movement
3 Axes<br> X, Y Axis: Grinding wheel dressing with interpolation<br> Z: Lower slide movement
3 Axes
X, Y Axis: Grinding wheel dressing with interpolation
Z: Lower slide movement
4 Axes<br> X, Y Axis: Grinding wheel dressing (Profile dressing) <br> Z Axis: Lower slide movement <br> Z1 Axis: Upper slide movement
4 Axes
X, Y Axis: Grinding wheel dressing (Profile dressing)
Z Axis: Lower slide movement
Z1 Axis: Upper slide movement
5 Axes<br> X1, Y1 Axis: Regulating wheel with interpolation<br> X Axis: Grinding wheel dressing <br> Z Axis: Lower slide movement <br> Z1 Axis: Upper slide movement
5 Axes
X1, Y1 Axis: Regulating wheel with interpolation
X Axis: Grinding wheel dressing
Z Axis: Lower slide movement
Z1 Axis: Upper slide movement
6 Axes<br> X, Y Axis: Grinding wheel dressing with interpolation<br> X1, Y1 Axis: Regulating wheel dressing with interpolation<br> Z Axis: Lower slide movement<br> Z1 Axis: Upper slide movement
6 Axes
X, Y Axis: Grinding wheel dressing with interpolation
X1, Y1 Axis: Regulating wheel dressing with interpolation
Z Axis: Lower slide movement
Z1 Axis: Upper slide movement

Machine Design Feature

LCD Touch Screen Control Technology
Auto-infeed Grinding Cycle
 
Cycle sequence:
  • S1-Rapid approach
  • S2-Coarse grinding
  • T1-Dwell time
  • S3-Fine grinding
  • T2-Sparkout dwell time
  • S4-Rapid retract
Automation Solution
 

Multiple machines can be linked to do rough, medium and fine grinding in one production line to save time for repetitive loading and unloading procedure.

Blade Selection
 

Due to different working diameters, the guide plate and regulating wheel must be parallel as this influences the grinding accuracy significantly.

Part name:Step shaft

Infeed grinding + auto-loading/unloading
Material:SCM415
Removed stock:Max. ∅0.2mm
Cycle time:25sec(loading/unloading included)
Roundness:1.5μm

 
Part name:Ball Piston

Infeed grinding + auto-loading/unloading
Material:SCM415
Removed stock:Max. ∅0.3mm
Cycle time:26sec(loading/unloading included)

 
Part name:Piston pin

Thrufeed grinding
Material:SCr21H
Removed stock:Max. ∅0.13mm
Feedrate:3m/min
Roundness:1.2μm

Grinding Sample
Specification
Compare
ECG-NC1206
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ECG-NC1808
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ECG-NC1810
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ECG-NC1812
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ECG-NC2008
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ECG-NC2010
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ECG-NC2012
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ECG-NC2408
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ECG-NC2410
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ECG-NC2412
Grinding Capacity Work diameter (w/standard workrest) mm Ø1-30 Ø1-60 Ø1-60 Ø1-60 Ø1-60 Ø1-60 Ø1-60 Ø1-80 Ø1-80 Ø1-80
Work diameter (w/special workrest) mm Ø30-50 Ø60-100 Ø60-100 Ø60-100 Ø60-120 Ø60-120 Ø60-120 Ø80-150 Ø80-150 Ø80-150
Auto infeed min. increment mm 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001
Grinding Wheel Wheel size (OD x Width x ID) 08type mm φ305x150xφ120 φ455x205xφ228.6 φ455x205xφ228.6 φ455x205xφ228.6 φ510x205xφ304.8 φ510x205xφ304.8 φ510x205xφ304.8 φ610x205xφ304.8 φ610x205xφ304.8 φ610x205xφ304.8
Wheel size (OD x Width x ID) 10type mm - φ455x255xφ228.6 φ455x255xφ228.6 φ455x255xφ228.6 φ510x255xφ304.8 φ510x255xφ304.8 φ510x255xφ304.8 φ610x255xφ304.8 φ610x255xφ304.8 φ610x255xφ304.8
Wheel size (OD x Width x ID) 12type mm - φ455x305xφ228.6 φ455x305xφ228.6 φ455x305xφ228.6 φ510x305xφ304.8 φ510x305xφ304.8 φ510x305xφ304.8 φ610x305xφ304.8 φ610x305xφ304.8 φ610x305xφ304.8
Motor rated power / max. torque kw/Nm 5.5/36(Opt. 7.5/49) 11/71(Opt. 15/97) 11/71(Opt. 15/97) 11/71(Opt. 15/97) 15/97(Opt. 18.75/120) 15/97(Opt. 18.75/120) 15/97(Opt. 18.75/120) 15/97(Opt. 22.5/143) 15/97(Opt. 22.5/143) 15/97(Opt. 22.5/143)
Spindle speed rpm 2080 1400 1400 1400 1250 1250 1250 1050 1050 1050
Dressing increment per gra./rev. mm 0.01 / 1.5 0.01 / 2 0.01 / 2 0.01 / 2 0.01 / 2 0.01 / 2 0.01 / 2 0.01 / 2 0.01 / 2 0.01 / 2
Regulating Wheel Wheel size (OD x Width x ID) 08 type mm φ205 x 150 x φ90 φ255x205xφ111.2 φ255x205xφ111.2 φ255x205xφ111.2 φ305x205xφ127 φ305x205xφ127 φ305x205xφ127 φ355x205xφ152.4 φ355x205xφ152.4 φ355x205xφ152.4
Wheel size (OD x Width x ID) 10 type mm - φ255x255xφ111.2 φ255x255xφ111.2 φ255x255xφ111.2 φ305x255xφ127 φ510x255xφ304.8 φ305x255xφ127 φ355x255xφ152.4 φ355x255xφ152.4 φ355x255xφ152.4
Wheel size (OD x Width x ID) 12 type mm - φ255x305xφ111.2 φ255x305xφ111.2 φ255x305xφ111.2 φ305x305xφ127 φ510x305xφ304.8 φ305x305xφ127 φ355x305xφ152.4 φ355x305xφ152.4 φ355x305xφ152.4
Spindle speed (infinite variable) rpm 15-310 15-310 15-310 15-310 15-310 15-310 15-310 15-310 15-310 15-310
Upper slide infeed handwheel per gra./rev. mm 0.02 / 4 0.05 / 3.5 0.05 / 3.5 0.05 / 3.5 0.05 / 3.5 0.05 / 3.5 0.05 / 3.5 0.05 / 3.5 0.05 / 3.5 0.05 / 3.5
Upper slide micro infeed handwheel per gra./rev. mm N/A 0.001 / 0.02 0.001 / 0.02 0.001 / 0.02 0.001 / 0.02 0.001 / 0.02 0.001 / 0.02 0.001 / 0.02 0.001 / 0.02 0.001 / 0.02
Swivelling angle (L/R) deg ±5° ±5° ±5° ±5° ±5° ±5° ±5° ±5° ±5° ±5°
Inclining angle (F/R) deg +5° ~ -3° +5° ~ -3° +5° ~ -3° +5° ~ -3° +5° ~ -3° +5° ~ -3° +5° ~ -3° +5° ~ -3° +5° ~ -3° +5° ~ -3°
Dressing increment(X1,Y1) per gra./rev. mm 0.01 / 1.5 0.01 / 2 0.01 / 2 0.01 / 2 0.01 / 2 0.01 / 2 0.01 / 2 0.01 / 2 0.01 / 2 0.01 / 2
Regulating wheel motor kw 2 3 3 3 3 3 3 5 5 5
Infeed servo motor (NC) kw 1 1 1 1 1 1 1 2.5 2.5 2.5
Motors Hydraulic motor kw 0.75 0.75 0.75 0.75 0.75 0.75 0.75 0.75 0.75 0.75
Machine Net weight kg 1800 3300 3300 3300 3400 3400 3400 6100 6100 6100
Gross weight kg 2200 3600 3600 3600 3700 3700 3700 6600 6600 6600
Packing size (L x W x H) mm 2260x1950x1820 2700x2240x1850 2700x2240x1850 2700x2240x1850 2700x2240x1850 2700x2240x1850 2700x2240x1850 3580x2240x2070 3580x2240x2070 3580x2240x2070
Standard accessories
Tools and tool box
Standard coolant tank
Wheel extractor
Diamond dresser
Levelling bolts and blocks
Grinding wheel with flange
Regulating wheel with flange
Spindle lubrication system w/ cooling fan
Regulating wheel with flange
Manual lubricator for guide ways (S model)
Operation manual and part lists
Thrufeed workrest
Infeed workrest
Control panel (S model)
PLC controller + touch screen + control panel (NC model)
FANUC 0i-TF CNC controller (CNC model)
Optional accessories
Vibration feeder auto. loading system
Auto. unloading system for thrufeed grinding
Forming attachment (forming plates)
Coolant system with magnetic separator
Thrufeed blade (various sizes)
Infeed blade (various sizes)
Hydraulic forming attachment
Coolant system with paper filter
Coolant system with magnetic separator & paper filter
Infeed grinding workpiece eject attachment ( hydraulic / pneumatic )
Auto. loading system for thrufeed grinding (Φ5∼25mm, L 50∼600mm)
Hopper type auto. loading system for thrufeed grinding (Φ2∼8mm, L 50∼180mm)
Input rail & output rail
Balancing stand/ arbor
Spare regulating wheel flange
Spare grinding wheel flange
CE standard electrical cabinet
Special workrest (for large dia. Workpiece)
Minor diameter workrest (dia. 0.7~8mm)
The machine base is made of Meehanite castings designed to reduce vibration. The machine base provides stable support to the grinding wheel and regulating wheel assemblies to ensure a rigid machine foundation and better accuracy.
A hydraulic dressing unit on both the grinding and regulating wheels with precisely handscraped guide ways provides stable hydraulic movement and the best dressing effects. Various types of form dressing can be achieved with optional templates.
  • NC model: optional auto. grinding wheel dressing device enables count dressing, time dressing, or auto dressing and compensation
  • CNC model: with two axes servo control and the automatic compensation system can precisely dress forms with complicated shapes.
  • Various workrest design: E-tech developed various kinds of workrest based on different diameter of workpieces, which are easy for operating adjustment.
Both grinding & regulating wheel spindles are made of Ni-Cr-Mo alloy steel, which is normalized, carbonized, hardened and grounded.
A double inverted “V” slideway with optimum spacing for the regulating wheel assembly provides smooth movement and stable grinding operation.
The regulating wheel utilizes a servo motor which provides infinitely variable speeds. The speed can be set digitally to reach constant surface speeds even when the diameter of the regulating wheel changes. Consequently, better surface finishes and roundness of the workpiece can be achieved. A beltdriven transmission system is also adopted for the regulating wheel for less vibration and noise compare to traditional chain-driven system
Automatic infeed models (NC) are equipped with a PLC touch screen control with easy learning conversational software.
An infeed grinding cycle can be completed by simply choosing the grinding cycle mode (single or automatic), inputting grinding data and then pressing cycle start.
Features
ECG series high precision centerless grinder is different from other competitors, we use spectrum analyzer to precisely analyze the machine base inner ribs and casting thickness for greater rigidity. We offer hydrodynamic alloy bearing spindle with best rotation accuracy, suitable for heavy duty jobs, and drastically increase the spindle longevity.
NC Series
With all the advantage of S series, NC series further offers lower slide (Z axis) with servo motor driven design which enables the infeed position located precisely, and the infeed distance can be controlled by numerical value.
Auto. grinding wheel dressing and compensation system can be equipped as optional accessories and led to easy computer numerical control grinders for operators.