MTMD DRAG FINISHING MACHINE
VARIOUS APPLICATIONS
The drag finishing systems developed by Trowal represents a special technology for surface finishing of high value, delicate components, parts with many contours and complex geometry and extremely hard materials which are difficult to machine.
The applications for the Trowal drag finishing technology range from aggressive grinding to surface smoothing and high gloss polishing of decorative parts.
Examples: surgical implants, turbine blades, precision parts, i.e. pumps and compressors, parts made from hard metal, sintered parts, etc.
FOR EDGE PREPARATION (HONING) OF CYLINDRICAL CARBIDE TOOLS
APPLICATION
The Drag Finishing Technique developed by Walther Trowal is a special process for mass finishing of:
- high value and delicate components
- sophisticated geometries and contoured parts
- extremely hard and difficult to machine materials
The field of application for the drag finishing technique covers a wide range from heavy metal removal and edge breaking to fine finishing and surface improvement as well as high lustre polishing of visible surfaces.
The Walther Trowal Mini-Drag Finishing Machine M-TMD 4/2 is especially designed for:
- End Mills
- Drills
- Thread Milling Cutters
- Hobs
Made of carbide or CBN
FUNCTIONAL PROPERTIES
The tools are fixtured on special holders and dragged through a still standing abrasive media mass. The individual tool holders may also rotate separately.
- up to 40 times faster metal removal verses vibratory finishing
- components do not touch nor damage during process
TECHNICAL CHARACTERISTIC
- compact, space saving design
- main drive by strong geared motor or servo motor
- lowering / lifting of rotary main gear via spindle drive / ball spindle drive
- fast exchange of abrasive media by replacement of portable work bowl
- user friendly industrial PC with unlimited number of programs
- variable speed adjustment of all drive motors by frequency control
THE PROCESSING TARGETS
- produce a defined and reproducible cutting edge radius on cylindrical tools
- improve the quality in the flute and on the clearance angle surface
- improve lifetime of cutting tools with selected edge preparation
- remove uncontrolled debris from surface and polish after coating
THE ADVANTAGES
- extremely precise edge radiusing in short cycle times
- fully reproducible process performance
- surface improvement of flute and clearance angle area
- up to double lifetime improvement when machining tough materials
- improvement of durability of coated material after edge preparation
- production cost savings with proper edge preparation
MACHINE FEATURES
- rotary gear driven by main motor or servo motor
- individual tool holders driven by separate motor
- rotation speed and direction individually selectable
- precise submersion adjustment of tools in abrasive media
- rapid movement of lowering / lifting device by ball spindle drive
- fast and easy replacement of portable abrasive media bowl
TOOL CLAMPING STATIONS
- mechanical clamping and pneumatic disconnect chucks with collets
- special chucks covering a range of tool diameters for automatic load / unload
- up to 6 clamping stations