Products
● End Face Grinding Device (Optional)
● Swiveling spindle head
● Motor Fixing Bar
● Precise Feed Positioning
● Spindle Head Driven by Servo Motor
● Automatic Belt Tension Control
● Hydraulic Power / Lubrication Unit
- 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.
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 CNC Control
The CNC internal grinding machine is equipped with a FANUC (Oi-Mate TC) control. It employs macro (macro programs) operation interface combined with the use of an 8.4" colorful LCD screen, greatly upgrading production and providing outstanding grinding accuracy.
AUTOMATIC SENSING DEVICE
It can conduct fine surface grinding of interior radii and end faces, and the device monitors the wheel during operation, protecting it from overloading.
Automatic Grinding Cycle
GRINDING TEST REPORT | JHI-150-CNC |
Grinding Wheel Specifications | WA 80K5V5A |
---|---|
Workpiece Size | Ø27 ± 0.003 mm |
Workpiece Material | SNCM220 |
Total Grinding Amount | 0.34 mm |
Rough Grinding Feed Rate | 40 mm/s |
Ratio | 100% |
Rough Grinding Amount | 0.32 |
Finish Grinding Feed Rate | 25 mm/s |
Ratio | 100% |
Finish Grinding Amount | 0.02 mm |
Feed for Rough Grinding | 0.005 mm |
Feed for Finish Grinding | 0.002 mm |
Polishing Time | 30 sec. |
Wheel Dressing for Rough Grinding | 0.01 mm |
Wheel Dressing for Finish Grinding | 0.01 mm |
Roundness Accuracy | 2 um |
ITEM | JHI-150NC | JHI-150BCNC | |
Capacity | Range of I.D. grinding | Ø6-150mm | Ø6-150mm |
---|---|---|---|
Max grinding depth | 150 mm | 150 mm | |
Max holding length | 200 mm | 200 mm | |
Swing over bed | 500 mm | 500 mm | |
Swing in chuck guard | 280 mm | 280 mm | |
Wheel feeding(X axis) | Rapid feed speed | 5 m/min | 5 m/min |
Max.stroke | 100 mm | 100 mm | |
Min.setting unit | 0.001 mm | 0.001 mm | |
Wheel feeding(Z axis) | Rapid feed speed | 8 m/min | 8 m/min |
Max.stroke | 450 mm | 450 mm | |
Min.setting unit | 0.001 mm | 0.001 mm | |
Work head | Spindle speed | 10-1000 rpm | 10-1000 rpm |
Spindle | A2-5 | A2-5 | |
Swivel angle | ±8° | ±15° | |
Workhead table | Swivel angle | - | - |
Rotary table | Rpm | - | 0-20 rpm |
Min.unit | - | 0.001° | |
Swivel angle | - | -90° | |
Motor | G/W pindle motor | Standard 3HP 2P optional 5HP 2P |
Build-in type 7.5 KW/10HP |
Spindle head motor | Servo 1.5 KW | Fanuc Servo 3.5 KW | |
Z-axis servo motor | 1.5 KW | 1.2 KW | |
X-axis servo motor | 0.75 KW | 0.75 KW | |
Coolant | 1/4HP 2P | 1/4HP 2P | |
Hydraulic lubrication | 1/4HP 4P | 1/4HP 4P | |
Hydraulic system | 1HP 4P | 1HP 4P | |
Rotary table | - | - | |
Packing | Size of Case | 2900x1900x2100 mm | 2900x1900x2100 mm |
Net weight | 2500 Kgs | 3100 Kgs | |
Gross weight | 2700 Kgs | 3300 Kgs |
Grinding Test Report | Model JHI-150-NC |
Grinding Wheel Specifications | WA 80K5V5A |
---|---|
Workpiece Size | Ø27 ± 0.003 mm |
Workpiece Material | SNCM220 |
Totle Grinding Amount | 0.34 mm |
Rough Grinding Feed Rate | 40 mm/s |
Ratio | 100% |
Rough Grinding Amount | 0.32 |
Finish Grinding Feed Rate | 25 mm/s |
Ratio | 100% |
Finish Grinding Amount | 0.02 mm |
Feed for Rough Grinding | 0.005 mm |
Feed for Finish Grinding | 0.002 mm |
Polishing Time | 30 sec. |
Wheel Dressing for Rough Grinding | 0.01 mm |
Wheel Dressing for Finish Grinding | 0.01 mm |
Roundness Accuracy | 2 um |