Along with other precision machined components, GLUMANN Maschinenbau in Chemnitz, Germany specialises in producing long rotating shaft type parts. Deep Hole Drilling plays an important role the production of these items and so in order to keep up with the growing volume demands from an engineering customer, the contract manufacturer (GLUMANN) decided to equip their new Deep Hole Drilling Machine from TBT with a fully automatic loading system. TBT (the deep hole drill-ing specialist from Dettingen/Erms, Germany) developed the ideal solution.
Deep Hole Drilling is an important technology for any contract manufacturer that processes shaft type parts within their portfolio. Many shafts require relief holes or have to be supplied with lubricant. That’s why GLUMANN Maschinenbau AG in Chemnitz has seven deep hole drilling machines in operation, including two from TBT in Dettingen/Ems for hole depths up to 2000 mm. The larger machine, an up-to-date ML500, is mainly used to work on various configurations of shaft for a long-standing engineering customer. The diameter of the holes in these shafts can vary, up to 80 mm. BTA/STS deep hole drilling method is the technology used. In this method, the cutting oil is fed to the tool under pressure along the outside of a hollow drill tube. The drill head itself, which is mounted onto the end of this tube has hard metal (carbide) cutting plates or inserts and has openings directly behind the cutting plates which allow cuttings and cooling lubricant to exit out of the hole through the inside of the drill tube and then into a chip conveyor. Gerhard Glumann, Chairman of the Board and Production Director looks back: “As the quantity of shafts to be processed (drilled) on this machine kept increasing, we had to come with a new solution to stop us getting into delivery deadline issues“. “We opted for a fully automatic loading system, so that the machine could be operated unmanned once all processing parameters have been set. We presented this plan to our machine manufacturer TBT, who then worked upon a solution for us”.
Developing systems which facilitate fully automatic operation of deep hole drilling machines is part of everyday life for the experts in Dettingen/Erms and many solutions are available as standard. But in this case, TBT designed a unit precisely tailored to meet the requirements and conditions at GLUMANN.