Processutveckling av borstgradning
During the milling of Sandvik Coromant?s world leading Drill with replaceable inserts,the CoroDrill880©, burrs appear around the milled surfaces. The burrs are removedusing different methods, one of which is deburring with special brushing machines thatare integrated into milling cells. The machines of the type Sinjet, use a Siemensguidance system. The deburring results are not satisfying and manual deburring isrequired afterwards. The manual deburring may cause damage to important edges andmeasurements of the product and is also very time consuming for the machineoperators.As almost no engineering work has been done with the process, it has to be evaluatedand improved. The objective is to present a proposition of an improved process,where no manual deburring is required and also to present an instruction manual ofhow the implementation should be carried out.The evaluation of the deburring process revealed some flaws that lead to themachines bad performance. The greatest flaw was that many dimensions of theproducts use the same recipe, where few parameters are adapted to the differentdimensions, which gives an uneven performance. Another problem was the generallack of knowledge about the guidance system.Many experiments were carried out to find which adjustable parameters that had themost influence on the machines performance. The tests showed that the brushingangle against the part and the brushes in feed depth had the most effect. By designinga new program that was better adapted to the problematic areas of the part, as wellas making better use of the parameters that gave the best results, a significantimprovement was achieved.An instruction manual was made in order to explain the changes in the program andthe different parameters contribution to the performance of the machines. Theimplementation process was also thoroughly explained to make the work easier forthe ones doing it.