Peeling Knife Grinder Machine

A Peeling Knife Grinder Machine is a specialized industrial machine designed for sharpening or regrinding long peeling knives used in veneer and plywood production. These knives are used in rotary peeling lathes to shave thin layers of wood from logs. Over time, the knives become dull due to constant use, and the grinder restores their sharpness to precise specifications.

Key Components and Description

1. Base Frame / Machine Body

• Material: Heavy-duty cast iron or fabricated steel.

• Function: Provides structural stability and vibration-free operation during grinding.

• Design: Rigid and precisely machined to support long knives (typically 1000 mm to 4000 mm or more in length).

2. Magnetic Knife Holding Table (Bed)

• Function: Holds the knife firmly in place during grinding using strong electromagnets.

• Adjustability: Can be tilted or adjusted to accommodate different knife angles and bevels.

• Cooling Grooves: Often designed with coolant drainage for effective grinding.

3. Grinding Head Assembly

• Grinding Wheel: Usually a vitrified or resin-bonded abrasive wheel suitable for high-precision edge grinding.

• Motorized Movement: The grinding head traverses along the length of the knife on precision guideways.

• Adjustable Angles: The grinding head can tilt or pivot to match the desired bevel angle of the knife (typically 1825).

4. Motor and Drive System

• Main Motor: Drives the grinding wheel; power varies depending on machine size (commonly 310 HP).

• Feed Motor: Controls the movement of the grinding head along the knife length.

• Drive Type: Belt-driven or gear-driven systems with speed controls.

5. Coolant System

• Purpose: Circulates coolant (usually water-based with anti-rust additives) over the grinding area to prevent overheating and warping of the knife.

• Components: Coolant pump, tank, and spray nozzles.

6. Control Panel

• Features: Start/stop buttons, grinding head speed controls, magnetic table switch, emergency stop.

• Optional: Digital display for bevel angle, grinding length, and automatic cycle settings.

7. Safety Features

• Guard Covers: Over the grinding wheel to prevent debris or sparks.

• Emergency Stop Switch: For quick shutdown in case of fault.

• Overload Protection: For motors and electrical components.

Typical Specifications

Applications

• Veneer knife regrinding

• Plywood industry

• Rotary lathe knife sharpening

• Industrial woodworking tool maintenance