What is the right angle groove milling process in precision parts processing
In precision parts processing, right angle groove is composed of three planes, and its section shape is three straight lines, and adjacent straight lines are perpendicular to each other. Right angle groove is generally divided into three forms: closed, semi closed and open right angle groove. The right angle groove can be distributed on the plane and cylindrical surface. The more classical right angle groove is the keyway, which can be divided into ordinary flat keyway and semicircular keyway. The milling process characteristics of right angle groove are as follows:
1. Use fixed diameter or fixed width milling cutter (such as keyway milling cutter, semicircular keyway milling cutter, disc slot milling cutter, etc.) for processing to control the groove width size with high accuracy, such as the shaft keyway matched with flat key and semicircular key, open right angle groove with matching accuracy requirements, etc.
2. In the machining of precision parts, different tool setting methods are usually adopted for the symmetrical position of the keyway on the shaft according to the different accuracy levels. For keyways with high symmetry requirements, the indicator ring table method is used to find the relative position between the workpiece axis and the tool axis or the middle section of the disc milling cutter. Keyways with low symmetry requirements can be processed by the tool alignment method with the cutting mark.
3. V-shaped block is usually used for positioning the keyway on the shaft, or the indexing head self centering chuck is used for clamping to ensure the symmetry of the workpiece and other main processing accuracy requirements