ISO 15641:2001 pdf download

ISO 15641:2001 pdf download.Milling cutters for high speed machining 一Safety requirements.
3 Terms and definitions
For the purposes of this standard the terms and definitions given in EN 1070, Iso 3002-1 and the following apply:
3.1 Tool classification terms
3.1.1
solid or one-piece cutter
milling cutter which has no detachable parts. Its body and cutting part or parts are one piece.
3.1.2
composite cutter
milling cutter in which the cutting part or parts (e.g. tips) are attached to the body by material bonding (e.g. by brazing).
3.1.3
complex cutter
milling cutter in which one or more parts (e.g. indexable inserts, cartridges, clamping elements) are attached to the body by mechanical fastening (e.g. key bolt, screw bolt or clamp bolt fixing which operate by friction lock or form lock principles).
3.2 Types of fixing
3.2.1
bonding
securing of cutter parts with material bonding such as brazing, welding or gluing.
3.2.2
separable
securing of cutter parts by detachable fastening(s). Examples are friction lock and form lock fixings, or a combination of these, which can be mounted and detached repeatedly.
3.2.3
friction lock
means of securing cutter parts where friction force prevents the movement of parts in use.
3.2.4
form lock
means of securing cutter parts where the shape and arrangement of parts prevents their movement in use.
3.3 Terms for the designation of geometric parameters
3.3.1
maximum diameter of tool D
maximum diameter of the circle created by cutter rotation. See D in figures 3, 4 and 5.
4 Hazards
4.1 Effects which generate hazards
4.1.1 Primary hazards
When milling cutters are applied at high peripheral speeds, the forces associated with normal machining are exceeded by the squared increase in centrifugal force due to the high rotational speeds employed. Other forces, for example:
through the acceleration of the cutter to working speed, clamping at the drive end, prestressing forces in complex cutters and fluid forces from air or cooling liquids have also to be considered. The centrifugal force will usually be the primary load and the high levels of energy applied leads to high structural loads which can, in the extreme, burst the cutter.
High levels of rotational energy are contained within milling cutters when they are applied at high peripheral cutting speed. In the event of cutter failure, this energy is likely to be released. The released component masses will move, in the rotational or translatory directions, away from their original axis of rotation at high velocities and with unpredictable trajectories. Their energies can only be dissipated through single or multiple collisions or deformation of machine parts in their motion paths.
Dependant upon the mode of cutter failure, the released energy can be sufficient to destroy and penetrate machine parts. This may lead to serious injury of persons at or near the machine. It is inconceivable that operating personnel will be able to stop the machine or to leave the danger zone, in time to avoid such injury, because of the dynamics of these high speed machining operations.
4.1.2 Handling hazards
Hazards for operating personnel also arise from the handling of milling cutters as may be necessary both before and after their use in machining operations (e.g. transport, assembly, mounting/dismounting, clamping at the machine spindle) (see clause 7).
5.4.3 Testing of complex cutters
Complex cutters may be tested in accordance with 5.4.2 but sufficient assurance of resistance to centrifugal force is also demonstrated when a rotational speed for test of 1,6 times the declared maximum rotational speed is reached without bursting or fracture and any permanent deformation or displacement does not exceed 0,05 mm.
5.4.4 Duration of rotational speed for test
The rotational speed for test applied in accordance with 5.4.2 or 5.4.3 shall be sustained for a minimum duration of one minute.
6 Marking of milling cutters
Milling cutters intended for high speed machining shall be clearly, visibly and permanently marked with the following minimum data:
— the maximum rotational speed and, if possible, with the following minimum data:
— name or trademark of the manufacturer or supplier
— specific code which, in conjunction with the manufacturer’s accompanying documentation, enables cutter characteristics to be determined
Verification: Visual inspection of the cutter and examination of the relevant drawings and documentation.
7 Documentation and information for use
The manufacturer shall provide documentation to accompany the cutter. This shall contain or give reference to information for the safe application of the cutter. This information shall include, as a minimum.