Saw blade for an oscillatingly driven saw

Patent metadata

Field	Value
Publication number	US-10220539-B2
Application number	US-201414542164-A
Country	US
Kind code	B2
Filing date	Nov 14, 2014
Priority date	Nov 15, 2013
Publication date	Mar 5, 2019
Grant date	Mar 5, 2019

Abstract

A saw blade for a machine tool driven oscillatingly about a longitudinal axis has at least one cutting edge, on which, at least in part, abrasive particles are provided. The saw blade is suitable, in particular, for sawing fiber composites.

First claim

The invention claimed is:

1. A machine tool for sawing fiber composites, said machine tool comprising an oscillatory drive having a tool spindle that is driven oscillatingly about a longitudinal axis thereof, wherein a saw blade is releasably attached to said tool spindle, said saw blade comprising at least one cutting edge, on at least a part of which, abrasive particles are provided for sawing the fiber composites, said saw blade comprising a mounting part being configured for attaching on the tool spindle, said at least one cutting edge comprising a plurality of teeth having at least one surface comprising a metal coating in which the abrasive particles are embedded, said plurality of teeth having tooth tips, which define the at least one cutting edge and which are separated from one another by gullets, said plurality of teeth also having tooth bases that extend from the mounting part,
wherein the plurality of teeth are connected to one another only at their respective tooth bases,
wherein said oscillatory drive has a certain oscillation angle,
wherein said saw blade has a toothing having an angular tooth spacing which is less than double said oscillation angle of said oscillatory drive,
wherein said angular tooth spacing is greater than said oscillation angle of said oscillatory drive, and wherein the plurality of tooth tips lie in a common plane,
wherein said mounting part comprises a mounting hole for attaching said saw blade to said tool spindle, and wherein said teeth are arranged along a pitch circle extending concentrically to said mounting hole, and
wherein each tooth tip extends along said pitch circle over an angular range of Z and each said gullet extends over an angular range of L, wherein a ratio of Z divided by L is greater than 1.

2. The machine tool of claim 1 , wherein said abrasive particles are selected from the group consisting of diamond, hard metal and boron nitrite.

3. The machine tool of claim 2 , wherein said metal coating is selected from the group formed by a soldering alloy and a nickel alloy.

4. The machine tool of claim 3 , wherein said metal coating is a copper-based soldering alloy and wherein said abrasive particles are hard metal particles.

5. The machine tool of claim 2 , wherein said abrasive particles are selected from the group consisting of diamond and boron nitrite, and wherein said metal coating consists of a nickel alloy.

6. The machine tool of claim 1 , wherein said abrasive particles have an average particle size of 0.1 to 0.5 mm.

7. The machine tool of claim 1 , wherein said abrasive particles are provided at least on one of said tooth tips and said gullets.

8. The machine tool of claim 1 , wherein said saw blade comprises side faces, and wherein said abrasive particles are at least partially arranged on said side faces.

9. The machine tool of claim 1 , wherein said teeth have a shape selected from the group consisting of rectangular teeth, trapezoidal teeth, negative trapezoidal teeth, M-shaped teeth, rectangular teeth without a base radius, round teeth, angled teeth, and flat teeth.

10. The machine tool of claim 1 , having a coated region coated with said metal coating and an uncoated region without any metal coating, said saw blade within said coated region having a thickness of 1 to 2.5 millimeters, said saw blade within said uncoated region having a thickness of 0.4 to 1 millimeters.

Assignees

• Fein C & E Gmbh

Inventors

• Mann Rainer

Classifications

• Y10T83/04

  Processes · CPC title

• B23D61/18

  Sawing tools of special type, e.g. wire saw strands, saw blades or saw wire equipped with diamonds or other abrasive particles in selected individual positions {(cut-off wheels of bonded abrasive or with inserted abrasive blocks B24D5/12)} · CPC title

• B23D61/006 Primary

  Oscillating saw blades · CPC title

• B27B19/006 Primary

  with oscillating saw blades; Hand saws with oscillating saw blades · CPC title

• B24D5/123

  having different cutting segments · CPC title