Piston ring grinding
Double-sided grinding of piston rings
Workpiece dimensions: Diameter 120mm, thickness 1.8mm, hardness 95-106 HRB
Workpiece material: Gray cast iron
Removal amount: 0.12-0.13mm, first pass removal amount is 0.085mm, second pass removal amount is 0.035-0.045 mm
Processing equipment: YHDM750A high-precision vertical double-ended grinding machine
Processing technology: Double-sided grinding thinning
Processing efficiency: 0.6s/pc, 6000 pc/hour
Dimensional control: ±0.005 mm
Planarity/parallelism after processing: 0.004mm
Surface roughness after processing: 0.25 µm Ra
Automated piston ring thinning production line
Advantages of Yuhuan double-ended grinding machine in grinding piston rings
1. Precision machining performance
Micron-level size control:
Parallelism ≤0.003mm, ensuring that the piston ring does not tilt in the ring groove, reducing the risk of wear by 57%.
Surface roughness Ra≤0.32μm (some models reach Ra0.2μm), significantly reducing the friction resistance between the piston ring and the ring groove by 15%.
The feed system uses a high-precision ball screw, combined with real-time compensation technology, to eliminate backlash and ensure grinding stability.
2. High efficiency and mass production capacity
Simultaneous double-sided grinding:
Upper and lower grinding wheels process simultaneously, the efficiency is increased by 4 times compared with single-sided grinding machine. Daily output is as high as 60,000 pieces, meeting the large-scale demand of the automotive industry.
High-speed automated operation:
Optional mechanical hand automatic loading and unloading, realizing 24-hour unmanned production line (such as the fully automatic production line integrating YHDM580B + robot + online detection)
3. Multi-functionality and compatibility
Widely adaptable workpieces:
In addition to piston rings, it can process valve plates, bearing rings, brake pads and other metal parts, as well as ceramic and glass hard and brittle materials.
Supports C-type grinding (high-efficiency multi-specification) and planetary grinding (thin-piece high-precision) modes.
4. Innovative structure and process design
Rigid anti-vibration body:
Box-type casting structure + vertical layout, excellent thermal stability, avoiding cantilever deformation leading to precision drift.
