Grinding or polishing tool for an oscillating drive
The invention discloses a tool for grinding and polishing, comprising a drive motor, which has a given machine power (rated input power) and by which a work spindle can be driven about its longitudinal axis in rotatingly oscillating fashion, and further comprising a tool-mounting fixture on the work spindle intended to receive a tool that has a working surface for grinding and polishing operations. The quotient of the working surface (in square millimeters) and the rated power input (in Watts) is at least 35 mm 2 /W, while the quotient of the working surface and the deadweight (in grams, without the tool) is at least 5.5 mm 2 /g.
1. An oscillating tool machine comprising:
an oscillating drive having a drive motor, which has a given machine power (rated input power);
a work spindle driven rotatingly oscillatingly by said drive motor about a longitudinal axis thereof; and
an oscillating tool attached releasably to said work spindle and having a working surface of a certain size for grinding and polishing;
wherein a quotient of the size of working surface of the tool (in square millimeters) and the rated power input (in Watts) of the drive motor is at least 35 mm 2 /W.
2. The oscillating tool machine of claim 1 , wherein said oscillating tool comprises:
a carrier element configured for holding a grinding or polishing material;
a driving element including a form-locking element for positive connection with the work spindle of the oscillating drive;
a back element to which said carrier element is fixed;
wherein said driving element has a higher strength than said back element; and
wherein said back element is made from a material of lower density than a material from which said driving element is made.
3. An oscillating tool machine comprising:
an oscillating drive having a drive motor, which has a given deadweight in grams;
a work spindle driven rotatingly oscillatingly by said drive motor about a longitudinal axis thereof; and
an oscillating tool attached releasably in form-locking fashion to said work spindle and having a working surface of a certain size (in square millimeters) for grinding or polishing;
wherein a quotient of the working surface and the deadweight of said oscillating drive without the tool (in grams) is at least 5.5 mm 2 /g.
4. The oscillating tool machine of claim 3 , wherein said oscillating tool comprises:
a carrier element configured for holding a grinding or polishing material;
a driving element including a form-locking element for positive connection with the work spindle of the oscillating drive;
a back element to which carrier element is fixed;
wherein said driving element has a higher strength than said back element; and
wherein said back element is made from a material of lower density than a material from which said driving element is made.
5. The oscillating tool machine of claim 4 , wherein
said driving element is made from steel;
said back element consists of a material selected from the group consisting of an aluminum alloy and a magnesium alloy; and
said carrier element consists of a plastic material.
6. The oscillating tool machine of claim 2 , wherein the driving element is made from a material having a Vickers hardness of at least 250 HV.
7. The oscillating tool machine of claim 2 , wherein said driving element is made from steel.
8. The oscillating tool machine of claim 2 , wherein said back element consists of a material selected from the group consisting of an aluminum alloy and a magnesium alloy.
9. The oscillating tool machine of claim 2 , wherein said driving element is fixed to said back element by a joint selected from the group consisting of a welding joint, a soldering joint, and a gluing joint.
10. The oscillating tool machine of claim 2 , wherein said driving element comprises a plurality of openings for reducing weight of said driving element.
11. The oscillating tool machine of claim 2 , wherein the back element comprises a plurality of openings for reduce weight of said back element.
12. The oscillating tool machine of claim 2 , wherein said back element comprises projections configured for positively engaging matching openings provided on said driving element.
13. The oscillating tool machine of claim 12 , wherein said projections of said back element are connected with openings on said driving element by caulking or fusing.
14. The oscillating tool machine of claim 2 , wherein the carrier element consists of an elastomeric material.
15. The oscillating tool machine of claim 1 , wherein said oscillating tool is disk-shaped and has a working surface with a diameter larger than 100 mm.
16. The oscillating tool machine of claim 2 , further comprising exhaust channels which extend through said carrier element, said back element and through said driving element.
17. The oscillating tool machine of claim 2 , wherein said carrier element comprises a fastening element on a side facing the tool, for detachably fastening said grinding or polishing material.
18. The oscillating tool machine of claim 17 , wherein said fastening element consists of a Velcro-type material.