Gear grinding center Y7226

CNCautomated loading/unloadingCBN

Product Overview
The Y7226 CNC worm wheel grinding machine is a 13-axis, 5-linkage precision grinder engineered for complex worm and worm-wheel geometries. Equipped with SIEMENS 840DSL CNC control, it enables synchronized motion between grinding wheel and workpiece to achieve accurate tooth profiles on hardened gears with modulus up to 5 mm and a maximum workpiece diameter of φ260 mm. The machine is optimized for repeatable dimensional accuracy and fine surface finish required in high-volume industrial production.

Key Features

• 13-axis CNC system with 5-linkage grinding kinematics for complex tooth geometry
• SIEMENS 840DSL control platform for precise trajectory and synchronization
• Capacity: workpieces up to φ260 mm diameter and 180 mm gear width
• Supports worm and worm-wheel grinding for modules up to 5 mm on hardened steels
• Automatic wheel-workpiece synchronization for faithful tooth profile generation
• Integrated automatic dressing, profile correction and compensation routines
• Compatible with automatic loading/unloading for batch and inline production

Recommended Configurations

• CBN or vitrified grinding wheels: Preferred for hardened steel gear blanks
• Automatic dresser unit: Maintains grinding wheel profile and sharpness
• Digital profile compensation module: Ensures high-fidelity tooth formation
• Enclosed coolant system: Improves surface finish and wheel life
• Laser gear measurement station: Inline inspection and profile validation
• Robotic loader: For continuous, high-efficiency production cycles

Application Case

• Client: Automotive steering-gear manufacturer — Germany
• Use case: Final grinding of hardened worm gears for electric power steering (EPS)
• Setup: Y7226 with CBN wheel, automatic dresser and closed-loop feedback
• Results: Profile deviation ≤ 3 μm across teeth; noise reduced by 35%; surface roughness Ra ≤ 0.3 μm; high repeatability with minimal setup time

Technical specifications

• Model: Y7226
• Brand: MINNUO
• CNC Control: SIEMENS 840DSL
• Axes: 13-axis
• Linkage: 5-linkage grinding motion
• Max. workpiece diameter: φ260 mm
• Max. gear width: 180 mm
• Max. module supported: up to 5 mm
• Capable of processing hardened gears
• Automatic tool dressing, profile correction and compensation
• Precise wheel–workpiece synchronization
• Supports automatic loading/unloading (automation integration)
• Recommended wheels: CBN or vitrified
• Options: enclosed coolant system, laser gear measurement station, robotic loader