Gear grinding center YS7250/YS7260

verticalCNC12-axis

Product overview
The machine is designed for precision grinding of gears used in automatic transmissions, passenger and commercial vehicle gears, and precision reducers. It supports batch production with accuracy reaching grade 4–5 according to GB/T10095.1-2008.

Main performance and features

• 12-axis, 5‑linkage CNC gear grinding machine suitable for high-precision, high-efficiency worm gear grinding.
• Grinding-wheel spindle: high-power direct-drive electric spindle imported from Germany; linear axes use imported high-rigidity rolling linear guides; ballscrews are imported preloaded high-precision types combined with Heidenhain glass scale or magnetic scale feedback for full closed-loop control.
• Machine software supports arbitrary lead modification, tooth-surface twist compensation, point dressing (arbitrary tooth profile dressing), surface pattern grinding, asymmetric double-pressure-angle gear grinding, and small-cone taper grinding.
• Control system: Siemens 840Dsl on a multi-channel control platform for flexible control of twelve CNC axes and full automation of clamping, wheel dressing, high-speed meshing, automatic grinding teaching, automatic dressing teaching, stock allocation and full grinding cycle.
• Operator interface developed in-house with gear parameter calculation and automatic generation of grinding and dressing programs.
• Right-side single-station transfer magazine and rotary robot enable automatic loading/unloading for automated batch production.

Main technical specifications

• Product series: YS72 series
• Axes and linkage: twelve axes, five-linkage CNC gear grinder
• Control system: Siemens 840Dsl multi-channel control platform
• Grinding spindle: German direct-drive electric spindle, 38 kW
• Linear guides and ballscrews: imported high-rigidity rolling linear guides; imported preloaded high-precision ballscrews
• Position feedback: Heidenhain glass scale or magnetic scale, full closed-loop control
• Max workpiece diameter: 500 mm (YS7250) / 600 mm (YS7260)
• Max module: 8 mm (YS7250) / 10 mm (YS7260)
• Wheel spindle max speed: 7800 r/min
• Workpiece spindle max speed: 610 r/min (YS7250) / 390 r/min (YS7260)
• Wheel center to table rotation center distance: 50–440 mm (YS7250) / 50–510 mm (YS7260)
• Max wheel mounting size: Φ300×Φ115×160 mm
• Max roller mounting size: Φ140×Φ52×40 mm (YS7250) / Φ160×Φ52×40 mm (YS7260)
• Spindle power: 38 kW

Applications & key functions

• Batch production of precision gear grinding for automatic transmissions, passenger/commercial vehicle gears and precision reducers.
• Supports fully automatic processing: automatic clamping, automatic dressing, automatic grinding, teaching and stock allocation.
• Supports various complex profile grinding and compensation functions to meet high-end gear profiling requirements.

Features / technical summary

• Product series: YS72 series
• Twelve-axis, five-linkage CNC gear grinding machine
• Control: Siemens 840Dsl multi-channel platform
• Main spindle: German direct-drive electric spindle, 38 kW
• Linear guides and ballscrews: imported high-rigidity linear guides; preloaded high-precision ballscrews
• Position feedback: Heidenhain glass scale or magnetic scale
• Processing capacity: Max workpiece Ø 500 / 600 mm
• Max module: 8 / 10 mm
• Wheel spindle max speed: 7800 r/min
• Automated loading: single-station transfer magazine with rotary robot