Rubbing (manufacturing process)
The rubbing according to DIN 8589-2, a metal-cutting production method , in which prefabricated holes with low cutting thickness to be drilled. It is part of machining with a geometrically defined cutting edge . The tool is a reamer . In addition to high dimensional accuracy, the goals are high surface quality and high dimensional accuracy. The positional accuracy can no longer be improved. In the classification of the manufacturing processes according to DIN 8589, it is dealt with together with drilling and countersinking . There are two variants of the method called rubbing:
- A sub-variant of round drilling is round reaming . (The others are drilling into solid, core drilling, and boring.)
- Profile reaming is a sub-variant of profile drilling .
Procedure
Round reaming is used to produce cylindrical, dimensionally accurate bores such as those required for pin connections or tool holders . The main cutting work is carried out from the start of the reamer.
An existing hole that has a friction allowance is drilled out with a reamer. Friction allowances must be chosen so that a minimum chip thickness is given, but there is no overload due to excessive chip removal. Since only one machining operation is carried out, the friction allowance corresponds to the machining thickness. This is very limited and, depending on the material and diameter of the bore, is 0.1 mm to 0.6 mm, with peeling reamer for long-chipping materials up to 0.8 mm.
The cutting speed of 3 to 28 m / min is about half that of drilling. The feed per revolution of 0.04 mm to 1.2 mm depends on the material, the bore diameter and the required surface quality.
See also
- List of machining processes
- Drilling : Related Technique
- Lowering : Related Technique
- Chip formation
- Machinability
- High speed machining
- Energy conversion and heat during machining
Individual evidence
- ^ Josef Dillinger et al .: Metal expertise . 56., revised. Ed. Verl. Europa-Lehrmittel, Nourney, Vollmer, Haan-Gruiten 2010, ISBN 978-3-8085-1156-5 , p. 136 .
