Mollart 3-Spindle Drillsprint Gundrilling Machine With Options To Cover A Wide Range Of Deep Hole Drilling Applications
Mollart 3-spindle Drillsprint Gundrilling machines were developed for the production drilling of shafts with deep holes in the drill diameter range of 2mm – 12mm. The drilling depths of either 750mm, 1200mm or 1500mm for center-line drilling are available to suit different applications for the Automotive, Medical, Defense and Aerospace industries.
The machines are integrated with the Fanuc 35-iB CNC Control System with programmable spindle feed rate, drilling depth & Process Monitoring. With full Fanuc control packages, the machines can be developed easily to match the performance of the materials and tooling. Specialist cycles have been developed to make the process as stable as possible so that ultimate production speeds can be achieved. Machine guards enclosing sliding access perimeter guarding and with electrical interlocks.
The Drillsprint specializes in gundrilling shafts using counter-rotation units to produce concentric bores where the wall thickness of the component is critical, or alternatively tooled with table-mounted fixturing for prismatic parts.
Turnkey Solutions with a gantry system as part of the machine and an automated loading system can also be offered on request. The standard loading can accept 9 parts on the load and 15 parts on the unload side of the conveyor. The system will have sensors for empty and full conditions on either side of the track.
Gundrilling Applications
- The Automotive Industry
Autoloading of a windscreen wiper shaft. A 3mm x 150mm hole was gundrilled to allow washer fluid to be pumped through into to washer jets mounted on the windscreen wiper blade arm. The feeder unit has the capacity to operate for one full shift.
- The Medical Industry
Drilling a Titanium medical part of 4.6mm x 450mm requires more work-holding techniques to ensure the product is as accurate as possible. With a TIR allowance of 0.2mm maximum error, everything has to be at the best condition. The machine in this case is fitted with precision hydraulic collets to center the part with independent self-centering roller support to ensure the whole part is held on the true centerline of the machine. Botek’s solid carbide tooling is then used to achieve feed rates of 42 mm/min whilst maintaining the TIR exit error better than 0.2mm. All parts are ultrasonically monitored to maintain 100% quality.
- The Defense Industry
Sporting rifle barrels are fed through the machine with an automatic conveyor that indexes the parts through after drilling. The range of parts were drilling diameters from 5 – 10mm and lengths from 300mm – 750mm.
Due to the vast number of customers we have supplied over the years, these are just examples of projects we have done for different industries. We have a wealth of experience and have a solution for all your deep hole drilling needs. You can find out more about Mollart manufactured Drillsprint machines here or get in touch at sales@mollartmachinery.com to discuss your individual project. If you have a particular problem and need a solution, we always have someone on hand who can help.
