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NC Internal Grinder JHI-150

Machine Features
  • Jainnher self-developed conversational operational interface for maximum operational convenience, and is easy to learn and understand.
  • Automatic operation and multiple settings. This allows for selecting coarse grinding, fine grinding, non-sparkle grinding and dressing.
  • High precision NC control provides automatic dressing with compensation function.
  • Ruggedly constructed throughout assures maximum rigidity and stability.
  • Table spindle, X-axis and Z-axis are driven by servomotors.
  • Intermittent lubrication on X-axis provides maximum smoothness of movement.

 

End Face Grinding Device (Optional)

  • When requested, the machine is available to equip with an End Face Grinding Device, allowing the machine to perform internal and end face grinding at one time.
  • This not only greatly increases machining efficiency but also achieves high perpendicularity accuracy.

Swiveling spindle head

  • The workhead can be swiveled +8° allowing for grinding tapered parts.

Motor Fixing Bar

  • Just as the motor starts running, a vibration occurs.
    The fixing bar is used for holding the motor in place. Amicrometric adjustment knob is provided for adjusting the belt tension.

Precise Feed Positioning

  • The grinding wheel feed is driven by a high performance servo motor, combined with precision ball screw transmission, providing high positioning accuracy.

Spindle Head Driven by Servo Motor

  • The spindle head is driven by a high performance servo motor, providing accurate variable speed change.
  • The servo motor drive features no speed loss and constant torque output no matter if the spindle is running at high or low speed. It guarantees outstanding grinding surface quality.
  • The servo motor drive allows spindle positioning control for convenient workpiece release.

Automatic Belt Tension Control

  • The belt tension is automatically controlled by the motor weight to assure proper belt tension at all times.
  • This ensures full power transmission from the motor.
    The specially designed belt tension eliminates too tight or too loose tensiion problems that may affect grinding quality.

Hydraulic Power / Lubrication Unit

  • The hydraulic power unit consists of two gear pumps, providing hydraulic power to the chuck and wheel dressing device. It also delivers lubrication oil to base slideways.
  • The hydraulic power unit consists of high quality parts, featuring low noise running and long service life.
  • A fan cooling device is mounted on the hydraulic power unit, providing efficient heat dissipation.


Machine Features 2

Massive Machine Structure
Optimal Structural Design
Guarantees Lifetime Accuracy

To maintain the long term accuracy after years of operation, the machine structure of the JAINNHER Internal Grinding Machine is carefully designed and manufactured.
  • The machine base is manufactured from high quality cast iron (FC30), tempered and stress relieved for maximum stability of material.
  • Great span between slideways provides firm support for wheel head assembly.
  • Ruggedly constructed throunghout for outstanding rigidity and stabiliyt.
  • Scientific rib reinforcement on the base structure for increased machine rigidity and deformation-free performance.


State-of-the-Art NC Control

The NC internal grinding machine is equipped with a MITSUBISHI control, with powerful functions and conversational operation interface. The control uses touch-sensing screen, providing words or graphs to replace conventional lamp indications of operation.

Powerful Functions of NC Control

  • Chinese/English display conversion.
  • Various operational mode selection.
  • Parameter setting.
  • Motion signals display for various mechanisms.
  • Error message display


Automatic Grinding Cycle



Specification

ITEM
JHI-150NC
Capacity Range of I.D. grinding
Ø6 - Ø150 mm
Max grinding depth
150 mm
Max holding length
200 mm
Swing over bed
520 mm
Swing in chuck guard
280 mm
Wheel Head X-axis Max. feed rate
5 m/min
Min. setting unit
0.001 mm
Worktable Z-axis Max. feed rate
8 m/min
Min. setting unit
0.001 mm
Spindle Head Spindle speed
10 - 1,000 rpm
Spindle type
A2-5
Swivel angle
+8°
Motor Grinding wheel spindle motor
2HP 2p
Spindle head motor
Servo motor 1,500W AC
Z-axis servo motor
Servo motor 1,000W AC
X-axis servo motor
Servo motor 400W AC
Hydraulic motor
1/4HP 4P
Hydraulic chuck
1HP 4P
Coolant motor
1/8HP 2P
Packing Size of case
2900x1900x2100(mm)
Net weight
2,500 kgs
Gross weight
2,700 kgs


Standard Accessories

A. Grinding wheel spindle
(alternative of 10,000~30,000 rpm)
B. 3-jaw chuck C. Levelling plate
 
D. Coolant tank E. Tool box and tools F. Hydraulic system


Optional Accessories

A. Paper filter B. Magnetic separator C. End face grinding attachment
D. Grinding wheel spindle E. Hydraulic 3-jaw chuck F. Hydraulic rotary cylinder
 
G. Oil mist lubricator for grinding wheel (For spindle speed over 30,000 rpm only) H. Linear scale (X-axis) I. Oil Skimmer