The modern CNC hobbing
machines permit the radial motion of the workpiece-table and the axial movement of the tool.
Manufacturers of mud motors are experiencing hobbing
cycle times less than half those of milling while also saving most of the time required to polish.
In light of these developments, MHI will leverage its broad lineup of dry-cut hobbing
machines for everything from rough processing to finishing to propose new solutions for mass-producing the smaller and higher-precision gears demanded on automatic transmission system production floors.
Markus Grob, president of MAG Europe, says the "ability to integrate turning and hobbing
operations in a single machine will bring customers considerable savings."
This can be the oil used in gear hobbing
or the paraffin used in bore honing machines or the oil in quench tanks, which can also be prone to spontaneous combustion.
Taru, E; Teodorescu, M- On the dependence of torque moment and cutting force on the work material hardness during gears hobbing
, Galati, Fascicula V, anul V, 1987;
Since developing the world's first dry cutting gear production system using no cutting fluid in 1997, MHI has expanded its dry-cut product offerings, including machine tools such as gear hobbing
machines and gear shaping machines as well as cutting tools such as super dry hobs and super dry gear shaper cutters.
offers the 210H Hobber, suited for dry hobbing
. The work area is isolated from the machine frame to minimize thermal expansion caused by contact with hot chips.
Parts are honed after hobbing
, but on tight-tolerance gears, blanks might be honed before and after hobbing
But making an internal gear takes shaping--a slower, more painstaking process than the simpler hobbing
of an external gear.
The plant features vertical and horizontal CNC machining centers, CNC lathes, CNC gear hobbing
, gear shaping and horizontal broaching capability, which allows the company to handle single piece prototype, as well as higher volume machining operations, Rod Link said.