Purpose
Designed for grinding the outer arc of brake shoes and brake shoe assemblies of medium and heavy-duty vehicles.
Product Features
Controlled by a Guangzhou CNC dual-axis numerical control system for rough grinding, finish grinding and spindle machining. Rough grinding is performed by a horizontal grinding wheel, and finish grinding by a vertical grinding wheel. This ensures the machined surface is free of concave defects, with a circular runout ≤ 0.15 mm, and all feed movements are fully automated.
Technical Specifications
- Horizontal Grinding Head Motor: 15 kW, approx. 1,800 rpm
- Rough Grinding Servo Motor: 2.2 kW × 1 unit
- Vertical Grinding Head Motor: 7.5 kW, approx. 2,200 rpm
- Finish Grinding Servo Motor: 1.3 kW × 1 unit
- Fixture Rotation Motor: 1.2 kW
- Fixture Spindle Speed: 0.5–7 rpm
- Electroplated Diamond Wheel: ∅630 mm (mounted on main machine)
- Diamond Grinding Stick: Length＞40 mm (additional requirement)
- Electroplated Diamond Roller for Vertical Grinding Head: ∅300 mm × 240 mm (mounted on main machine)
- Grinding Range: R150–210 mm
- Brake Shoe Width: 80–220 mm
(Notes:The vertical grinding head is equipped with upper and lower protective guards (automatically open during grinding).)
For a 320 mm diameter grinding wheel: Cylindrical wheel travel ＞200 mm.
For a 420 mm diameter grinding wheel: Cylindrical wheel travel ≈150 mm.
For mass production of a single part type, it is recommended to configure diamond rollers of different heights. E.g., 220 mm brake pads with 240 mm rollers; 120 mm brake pads with 140 mm rollers.
Mandrel Precision: Radial runout & perpendicularity ≤ 0.02 mm.
Machining Accuracy (with inspection reference)
Straightness (measured on＞80% of effective ground area, workpiece unclamped): ≤ 0.10 mm
Circular Runout (measured on＞80% of effective ground area, workpiece unclamped): ≤ 0.15 mm
Taper (measured on ＞80% of effective ground area, workpiece unclamped): ≤ 0.15 mm
Rough Grinding Dust Extraction Port Diameter: ∅140 mm
Finish Grinding Dust Extraction Port Diameter: ∅140 mm
Overall Dimensions: As per actual measurements
Total Weight: Approx. 3,300 kg
