Traditional Car
1. Gasket
● Processing Technology
Stamping ➤ Rough grinding ➤ Leveling ➤ Medium grinding ➤ Hardening ➤ Fine grinding ➤ Deburring
| Thickness(mm) | Diameter(mm) | Flat(mm) | Parallel(mm) | Size(mm) | Margin(mm) | Hardness(mm) | Material | Grinding wheel | Roughness |
| 0.55-3 | 45-99 | 0.01 | 0.01 | ±0.005 | 0.03-0.2 | 30-50 | 65Mn\dc01 | Fine grinding CBN | Ra0.6 |
● Double Face Grinding Solutions
The differential gasket needs to be finely ground with 580B after middle grinding and quenching (Note: According to the requirements of the main engine factory, it can be divided into before and after quenching)
YHDM580B + CBN grinding wheel = automotive adjusting shim
2. Transmission gear
● Gear double-sided grinding process
Forging ➤ Normalizing ➤ Turning ➤ Hobbing, Shaping ➤ Shaving ➤ Heat Treating ➤ Grinding (reduce geometric tolerance)
| Thickness(mm) | Diameter(mm) | Flat (mm) | Parallel(mm) | Dimensions (mm) | Margin(mm) | Hardness(mm) | Material | Grinding wheel | Roughness |
| 0.55-3 | 45-99 | 0.01 | 0.01 | ±0.005 | 0.03-0.2 | 30-50 | 65Mn\dc01 | 精磨CBN | Ra0.6 |
● Grinding Solutions
Thickness higher than 8mm: 300/580B-5/77 series planetary oscillating grinding for one grinding; thickness less than 8mm: choose 580, 750 C type for multiple grinding according to the diameter; single-side grinding: 7418 is recommended
3. Brake Disc
Workpiece material: aluminum matrix composite material
Processing technology: double-sided grinding
Processing requirements: flatness Ra0.025
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4. Connecting Rod
Workpiece size: length 250mm, thickness 28.4mm
Workpiece material: 45Cr steel
Rockwell hardness: 32-36
Removal amount: 0.8mm
Processing equipment: YHDM750A high-precision vertical double-end grinding machine
Processing method: swing grinding
Processing technology: double-sided grinding to reduce thinning
Processing efficiency: 30 s (15 s/pc)
Flatness/parallelism after processing: ≤0.02mm
Surface roughness after machining: ≤0.5 Ra
5. Piston Ring
Workpiece size: diameter 120mm, thickness 1.8mm, hardness 95-106 HRB
Workpiece material: gray cast iron
Removal: 0.12-0.13mm, the first removal is 0.085mm, and the second removal is 0.035-0.045 mm
Processing equipment: YHDM750A high-precision vertical double-end grinding machine
Processing technology: double-sided grinding to reduce thinning
Processing efficiency: 0.6s/pc, 6000 pc/hour
Size control: ±0.005 mm
Flatness/parallelism after processing: 0.004mm
Surface roughness after machining: 0.25 µm Ra
6. Large Retaining Ring
Workpiece size: diameter 110mm
Grinding size requirements: 3.300mm±0.012
Processing technology: double-sided grinding to reduce thinning
Processing equipment: YHDM750 high-precision vertical double-end grinding machine
7. Stator Rotor
Workpiece material: powder metallurgy
Processing technology: double-sided grinding to reduce thinning
Processing equipment: YH2M8470 high-speed double-sided precision grinding machine
Surface roughness after processing: ≤Ra 0.5
Processing efficiency: 0.6 S/PC
Flatness/parallelism after processing: ≤0.002 mm
Removal amount: 150-200um
Thickness control: ≤3um
