Posted on 07th July, 2017
Gear can be cut on CNC Gear Hobbing Machine and CNC Gear Shaping Machine.
CNC gear hobbing machines are broadly divided with respect to diameter of gear cut on machine.. For eg : Small cylindrical gear cutting machines are used for cutting gear of diameter upto 400 mm. Medium size cylindrical gear cutting machines are used for cutting gear rom dia. 400 to 800 mm & Large cylindrical gear cutting machines are used for cutting gear of dia, 800 to 6000 mm.
There are machines with horizontal hobbing where component is fixed horizontally & cutter is on vertical axis. Gear cutting machines with automation are widely used for increasing productivity.
Gear hobbing machines are also equipped with attachments like blank turning, gear deburring, chamfering. Some gear hobbing machines are also available with gear shaping operation called as shobbers.
CNC Gear shaping machines are generally used for internal gears. It is different than hobbing machine in kinematics and construction. Gear grinding, gear honing and cnc gear shaving machines are used for finishing of already hobbed gear. Quality produced on these machines is approved by at least 1 DIN class. Rack cutting attachment can be put on Gear shaping machine for rack cutting.
CNC machine tools like large cylindrical gear cutting machines used for cutting higher module gears which are used for power generation, cement and sugar industries.
Auto industries require small and medium gear cutting machines as the parts size diameter is small. Gear boxes of automobile vehicle require wide range of gears which are produced in mass production by using either Automation or Robot.