Our customer, a company in the German Aircraft Industry, has been machining 30 back spot facings in a component made of Inconel 718 for some years. To do this, the customer had to set up the part several time because of the poor accessability of the some bores. These countersinks were carried out by a box column drill. For the other counterbores, he used a counterbore tool with a plug-in head for the back bore machining. The process time amounted to approx. 6 hours for one component. His goal was to simply and to speed up this process.
Due to the very demanding material and the partly difficult to access machining spots, the customer was very critical with regard to new solutions.
HEULE proposed its BSF tool with a working length of 15 mm equipped with a blade type BSF-M-1175 with X special coating.
- Speed: N = 300 U/min.
- Feed: F = 0.015mm/U
- Coolant: Inner and outer coolant
The customer expectation was to produce 10 to 15 back spot facings with one blade, so that he would not need more than two blades pro part.
With a uptime of 25 back spot facings per blade and a cycle time of 55 sec., the BSF tool exceeded his expectations considerably. Besides, the stability of the process could be improved because of the reduction to one single setup and by the omission of manual operations.
Being able to produce the part now in 35 minutes instead of 6 hours, the customer is not only satisfied but virtually exited about the new solution.