1. A grindstone for shaping a gear, wherein at least the outer layer portion of the toothed portion is configured of a metal-bonded super-abrasive layer.
2. A grindstone for shaping a gear according to claim 1, wherein the super-abrasive of said super-abrasive layer is composed of selected one of diamond and cubic boron nitride.
3. A grindstone for shaping a gear according to claim 1, wherein the profile of said super-abrasive layer is formed by electric discharge machining.
4. A grindstone for shaping a gear according to claim 3, wherein said electric discharge machining is a selected one of die sinking electric discharge machining and wire electric discharge machining.
5. A grindstone for shaping a gear according to claim 1, wherein said super-abrasive layer is formed of a multiplicity of super-abrasive sublayers.
6. A method of fabricating a gear-shaped grindstone for shaping a gear, wherein at least the outer layer portion of the tool portion is configured of a super-abrasive layer, said method comprising the steps of:
fixedly attaching a metal-bond material making up at least the outer layer portion of said toothed portion to a base metal; and
forming the profile of said outer layer portion by electric discharge machining.
7. A method of fabricating a gear-shaped grindstone for shaping a gear according to claim 6, further comprising the step of dressing said grindstone after electric discharge machining.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A laser protection arrangement with a safety cutoff, comprising:
a passive laser protection wall which stores the radiation energy of impinging radiation of a laser of a laser material processing installation;
a laser protection foil which undergoes a detectable change when struck by laser radiation being arranged in front in the direction of the laser radiation; and
at least one sensor being connected to the laser by a threshold switch in order to switch off the laser when the received detector signal exceeds or falls below a threshold value.
2. The laser protection arrangement according to claim 1, wherein the laser protection foil comprises an expandable plastic and is fixed in an expanded state, and the sensor is an expansion sensor.
3. The laser protection arrangement according to claim 2, wherein the laser protection foil is expanded in only one direction and the expansion sensor is an expansion measurement strip which is glued on in the expansion direction so that when struck by laser radiation the laser protection foil is destroyed at the point of incidence and a tear extends perpendicular to the expansion direction and leads to a drop in the tensile strain which is determined as a threshold value.
4. The laser protection arrangement according to claim 1, wherein the laser protection foil is a foil with at least one electric conductor path to which a voltage is applied or which carries current, and the sensor is a voltage measuring device or current measuring device so that when a conductor path is struck by laser radiation it melts and the voltage collapses or the current is interrupted.
5. The laser protection arrangement according to claim 4, wherein the electric conductor paths are embedded in the foil.
6. The laser protection arrangement according to claim 4, wherein the conductor paths are arranged on one side of the foil.
7. The laser protection arrangement according to claim 6, wherein the free side of the foil is coated with an electrically conductive layer so that a short circuit results when the foil melts due to the impingement of laser radiation.
8. The laser protection arrangement according to claim 1, wherein the laser protection foil is a foil with integrated optically conducting fibers comprising a fiber core and a fiber cladding, and the sensor is an optical sensor.
9. The laser protection arrangement according to claim 1, wherein the laser protection foil comprises a material which is transparent to the laser radiation and is provided on both sides with a layer reflecting the laser radiation so that when struck by laser radiation the layer is destroyed at the point of incidence and the laser radiation is coupled in so as to be guided to a sensor which is an optical sensor.
10. The laser protection arrangement according to claim 1, wherein the laser protection foil is a double foil which is formed by at least one gas-filled hollow chamber.
11. The laser protection arrangement according to claim 10, wherein the hollow chambers are filled with a special gas and the sensor is a gas sensor.
12. The laser protection arrangement according to claim 10, wherein an overpressure exists in the hollow chambers and the sensor is a pressure sensor.
13. The laser protection arrangement according to claim 10, wherein the double foil forming a hollow chamber is connected by a plurality of webs so that the expansion of the chamber is limited by the height of the webs.
14. The laser protection arrangement according to claim 10, wherein the laser protection foil is a bubble foil and the sensor is an acoustic sensor.
15. The laser protection arrangement according to claim 1, wherein the laser protection foil comprises an expandable plastic and is fixed in an expanded state and the detector is an acoustic sensor.
16. The laser protection arrangement according to claim 1, wherein a plurality of laser protection arrangements are combined to form a laser protection booth.
17. The laser protection arrangement according to claim 16, wherein the laser protection arrangements in each instance comprise a wall of identical height which are arranged next to one another so as to form the circumferential surface of the laser protection booth, and the laser protection foil is held in a frame so as to extend along the entire height, while the passive laser protection wall has a lower height.
18. The laser protection arrangement according to claim 17, wherein the laser protection arrangements define a ceiling surface of the laser protection booth which is formed by a laser protection foil.
19. The laser protection arrangement according to claim 16, wherein the laser protection foils are constructed according to claim 10 and are connected to one another in such a way that they form a freestanding booth around which the passive laser protection walls are arranged to form a laser protection booth.
20. A laser protection arrangement with a safety cutoff, comprising:
a passive laser protection wall which stores the radiation energy of impinging radiation of a laser of a laser material processing installation;
a laser protection foil which causes a detectable change when struck by laser radiation being arranged in front in direction of the laser radiation; and
at least one sensor being connected to the laser by a threshold switch in order to switch off the laser when the received detector signal exceeds or falls below a threshold value.