Tool

Patent metadata

Field	Value
Publication number	US-10427229-B2
Application number	US-201214130371-A
Country	US
Kind code	B2
Filing date	Jun 19, 2012
Priority date	Jul 1, 2011
Publication date	Oct 1, 2019
Grant date	Oct 1, 2019

Abstract

A tool, in particular a plunge-cut saw blade, includes a saw blade that has at least one main body and at least one working part. The working part has at least one working edge with saw teeth and is connected integrally to the main body along a straight connecting edge. The working edge includes a curved and/or polygon-like formation thereon.

First claim

The invention claimed is:

1. A tool configured to be fastened to a hand-held power tool, the tool comprising:
a saw blade composed of a bimetallic strip, the saw blade including:
at least one main body; and
at least one working part connected integrally to the at least one main body along a straight connecting edge, the at least one working part having at least one working edge having a set of saw teeth; and

a fastening part to which the saw blade is connected in an overlapping manner,
wherein the bimetallic strip comprises two different metal or metal alloy materials that are materially bonded together along the straight connecting edge,
wherein the bimetallic strip comprises the at least one main body and the at least one working part,
wherein the at least one working edge is shaped as a plurality of polygon segments including a first polygon segment, which is arranged substantially parallel to the straight connecting edge, and a second polygon segment and a third polygon segment, each of which is angled relative to the first polygon segment,
wherein each of the first, second, and third polygon segments includes two end points,
wherein each of the first, second, and third polygon segments includes at least three tooth tips,
wherein the end points of the first, second, and third polygon segments are located on a circular path having a radius about an axis of rotation of the tool, and
wherein the fastening part includes a form closure mechanism configured to transmit torque from the hand-held power tool and to define a rotary position of the saw blade relative to the hand-held power tool.

2. The tool as claimed in claim 1 , wherein the bimetallic strip has at least two edges that are at least substantially parallel to the straight connecting edge and that are each spaced apart from the straight connecting edge.

3. The tool as claimed in claim 1 , wherein one or more of the at least one working edge and the set of saw teeth is produced in one or more of a grinding process and a milling process.

4. The tool as claimed in claim 1 , wherein a height of the at least one working part is greater than a height of the set of saw teeth.

5. The tool as claimed in claim 1 , wherein the saw blade is fastened to the fastening part by a spot-welded connection.

6. The tool as claimed in claim 1 , wherein the tool is configured as a plunge-cut saw blade.

7. The tool as claimed in claim 1 , wherein:
a first of the two end points of the first polygon segment is coincident with one of the end points of the second polygon segment, and
a second of the two end points of the first polygon segment is coincident with one of the end points of the third polygon segment.

8. The tool as claimed in claim 1 , wherein the at least one working part consists of hard metal.

9. The tool as claimed in claim 1 , wherein the two different metal or metal alloy materials are materially bonded together by laser-welding or electron-beam welding.

10. The tool as claimed in claim 1 , wherein the at least three tooth tips of each of the first, second, and third polygon segments form a respective straight-line segment.

11. The tool as claimed in claim 1 , wherein the saw teeth are arranged such that a respective imaginary straight connecting line touches the at least three tooth tips of each of the polygon segments.

12. A method for producing a tool, comprising:
forming a saw blade from a bimetallic material comprising two different metal or metal alloy materials that are materially bonded together along a straight connecting edge, the saw blade including at least one main body and at least one working part, the at least one working part being connected integrally to the at least one main body along the straight connecting edge; and
forming a set of saw teeth in at least one working edge of the at least one working part, the at least one working edge being shaped as a plurality of polygon segments including a first, second, and third polygon segment, each of the first, second, and third polygon segments including two end points, each of the first, second, and third polygon segments including at least three tooth tips, the end points of the first, second, and third polygon segments located on a circular path having a radius about an axis of rotation of the tool,
wherein forming the saw blade includes parting off the saw blade from a bimetallic band with a parting tool, the bimetallic band comprising the two different metal or metal alloy materials that are materially bonded together.

13. The method as claimed in claim 12 , wherein the at least one working edge is produced when the set of saw teeth is produced.

14. The method of claim 12 , further comprising materially bonding the two different metal or metal alloy materials together by laser-welding or electron-beam welding.

15. The method of claim 12 , further comprising forming one or more of the at least one working edge and the set of saw teeth by one or more of grinding and milling.

16. The method of claim 12 , further comprising connecting the saw blade to a fastening part in an overlapping manner.

17. The method of claim 16 , wherein connecting the saw blade to the fastening part includes spot-welding.

18. The method of claim 12 , wherein the saw teeth are formed such that the at least three tooth tips of each of the first, second, and third polygon segments form a respective straight line segment.

19. The method of claim 12 , wherein the saw teeth are formed such that a respective imaginary straight connecting line touches the at least three tooth tips of each of the polygon segments.

Assignees

• Karlen Urs
• Bosch Gmbh Robert

Inventors

• Karlen Urs

Classifications

• B23D61/006 Primary

  Oscillating saw blades · CPC title

• Y10T83/9362

  Teeth having transversely curved cutting edge · CPC title

• B23D65/00

  Making tools for sawing machines or sawing devices for use in cutting any kind of material · CPC title