1. Product Description
Welcome to the WG350-I automatic circular knife grinding machine manufactured by Nanjing Weigao. The grinding process is automatically controlled by a PLC system, with variable-frequency adjustable feed speed. The machine bed and components are made of cast iron with standard processing technology. Transmission parts adopt high-precision linear guides and ball screws, ensuring grinding accuracy and long-term stability. The cutter head spindle box is equipped with a high-precision spindle and NSK bearings (Japan). The matching accuracy between the spindle and mandrel fixture is within 0.02 mm.
This machine can sharpen the cutting edges of various circular blades, including upper knives, lower knives, slitting knives, bottom knives, and flat knives. It is widely used in paper making, printing, textile, fiber and other industries.
Customization is available according to customer requirements.
This machine can sharpen the cutting edges of various circular blades, including upper knives, lower knives, slitting knives, bottom knives, and flat knives. It is widely used in paper making, printing, textile, fiber and other industries.
Customization is available according to customer requirements.
Special Note: The machine must be connected to three-phase four-wire 380V/50Hz + neutral wire and properly grounded.
Notes
- Equipped with Schneider electric components and Delta PLC (Taiwan)
- PLC system automatically controls the circular knife edge grinding process
- Stable and durable control system
- Cumulative matching accuracy between spindle and mandrel fixture: approx. 0.01 mm
- Ground circular knives feature excellent finish, consistent edge dimensions, and sharp cutting edges
2. Technical Parameters
- Workpiece grinding diameter: 50–350 mm (customizable up to 400 mm)
- Circular knife grinding angle: 0–180° (cutter head rotatable 360°)
- Worktable longitudinal travel: 200 mm
- Worktable cross travel: 300 mm
- Grinding head motor power: 380V, 50Hz, 0.75kW
- Grinding head speed: 2800 rpm
- Cutter head spindle taper: Morse No.4
- Cutter head spindle speed: 169 rpm
- Feed motor power: 380V, 50Hz, 120W
- Spindle gear motor power: 380V, 50Hz, 200W
- Water pump motor power: 380V, 50Hz, 125W
- Working lamp: 24V
- Grinding wheel dimensions:
Parallel wheel: OD 200 mm, bore 32 mm
Bowl-shaped wheel: OD 125 mm, bore 32 mm - Machine weight: 350 kg
- Overall dimensions (L×W×H): 0.9 m × 1 m × 1.3 m
3. Cutter Head Drive Assembly Introduction
The spindle drive accuracy of the cutter head assembly is within 0–0.01 mm, ensuring excellent outer circle run-out and uniform edge width of the ground circular knives.
- The cutter head spindle box is assembled with NSK bearings (Japan)
- Base rotatable 360°
- Spindle operating run-out accuracy: 0–0.01 mm
- Spindle taper: Morse No.4
- Cumulative run-out accuracy between circular knife fixture and spindle: 0.01–0.02 mm
- Mechanical indexing accuracy of cutter head base: 0.1°
- Spindle reduction motor power: 380V, 50Hz, 200 W
4. Machine Accuracy
| No. | Item | Parameter |
| 1 | Cutter head spindle runout accuracy | 0~0.005mm |
| 2 | Cumulative fitting accuracy of circular knife fixture & spindle | 0.005~0.02mm |
| 3 | Mechanical indexing accuracy of column base | 0.1° |
| 4 | Grinding head motor spindle runout accuracy | 0.01~0.02mm |
| 5 | Linear accuracy of grinding head movement (X-axis) | 0.005~0.01mm |
5. Main Configurations
| Component | Brand |
| Linear guideways | HTPM |
| Ball screw | HTPM |
| Control Electrical Appliances | Schneider |
| Control system | Delta (Taiwan) |
| Spindle bearing | NSK (Japan) |
6. Environmental Requirements
| Power supply | 380V±10V、50Hz |
| Ambient temperature | 0～40℃ |
| Ambient humidity | 35%～65% |
| Air supply | Clean and dry air, pressure 0.3 MPa |
| Vibration isolation | Isolate from vibration sources |
| Grounding | Independent and reliable grounding: Drive an iron rod deeper than 0.5 m into the concrete near the equipment, fix it with concrete, then connect to the grounding bar in the electric cabinet with a single‑core copper wire of diameter ≥2.5 mm. |
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