DE202005021802U1 - Cutting wheel - Google Patents

Abstract

The invention relates to an abrasive cutoff wheel which comprises a central disk (2) and a plurality of abrasive segments (4) which subtend between themselves a straight bonding line (10) that slants inward along a predetermined disk direction of rotation (12) toward the wheel center of rotation 14, deviating from a tangent line. Seen in wheel sideview, the radially outer surface (18) of each abrasive segment (4) preferably also is straight and slants inward along the wheel direction of rotation (12) toward the wheel center of rotation (14), deviating from a tangent line.

Description

The The invention relates to a cut-off wheel according to The preamble of claim 1 for separating building materials, in particular Concrete, bricks, roof tiles, and for separating natural stones.

A cutting wheel of this kind is from the DE 44 24 093 C2 known. It contains a core disk and segments. The segments are permanently attached by means of laser welding to a circumference of the core disk which is continuous or is divided into webs by circumferential recesses. The bond line between the segments and the outer contour of the core disk is formed at each segment tangent to the core disk center or by at least two corresponding tangential lines which are arranged at an angle of less than 180 ° roof shape to each other.

By the invention to the problem to be solved, the cut-off wheel to improve.

These Task is according to the invention by the features of claim 1 solved.

According to the Invention form each disc pad and the their attached segment interface, in slices side view seen, a straight composite line, which in a predetermined Disc rotation direction towards the disc rotation center inside is inclined, deviating from a Tangentiallinie.

By The invention will provide a better distribution of force on the composite line between the grinding segments and the core disc scored, resulting too a higher load capacity of the cut-off wheel leads. By the invention becomes an essential part of the abrasive cutting process resulting shear forces converted into compressive forces, which in the bond line between the abrasive segments and the core disk Act.

Further Features of the invention are contained in the subclaims.

According to one preferred embodiment of the invention is the radially outer Surface of each abrasive segment, in slices side view seen, straight, and this outer surface of each abrasive segment defines a surface line, which in disk rotation direction towards the disk rotation center inclined inwards, deviating from a Tangentiallinie. hereby comes with the first use of the cut-off wheel only a very small part of the abrasive segments in contact with the cutting workpiece, creating an automatic sharpening the abrasive segments by the first use possible becomes.

The Abrasive segments consist at least in their head area of a Carrier material and embedded therein diamond pieces, wherein they are for example reduced in the carrier material are. Before using a new cut-off wheel for the first time The diamond pieces are not made of the carrier material out, so that the cut-off wheel before a first-time use or must be armed by a first-time use by grinding out the carrier material, so that the diamond pieces then protrude from the substrate.

According to one Another preferred embodiment of the invention the surface line and the bond line of the relevant Grinding segments each parallel.

According to one another preferred embodiment of the invention has the core disc between adjacent disc pads each a circumferential incision. This can be done during the Grinding process of a workpiece abraded material easier to move out of the cut formed in the workpiece.

The Invention will be described below with reference to the attached Drawing based on a preferred embodiment of Invention described as an example.

In show the drawing

1 seen a segment-like section of a cutting wheel according to the invention in side view.

In the 1 The cutting wheel according to the invention shown comprises a substantially circular core disk 2 and a variety of abrasive segments 4 , The abrasive segments 4 are around the entire outer circumference of the core disk 2 around, preferably symmetrically, to a same plurality of, seen in disk side view rectilinear, disk pads 6 are distributed and each have a straight segment pad 8th , which in each case on only one of the disc connection surfaces 6 is permanently attached, for example by soldering, welding or laser beam treatment. The core disk 2 is preferably made of steel.

The cut-off wheel of the invention has a pulley rotation predetermined for cut-off operations 12 ,

Each disc connection surface 6 and the on their attached segment interface 8th form, seen in disk side view, a straight-line composite line 10 , which in the predetermined disc rotation direction 12 towards the disk rotation center 14 is inwardly inclined, deviating from a relative to the disk rotation center 14 tangential line. It concludes a theoretical radial line, which from the disk rotation center 14 to the midpoint of a disk interface seen in side view 6 runs, with this disc connection surface 6 an angle deviating from 90 °.

The radially outer surface 18 from each abrasive segment 4 is straight, as seen in disk side view, and defines a straight surface line 20 which in disk rotation direction towards the disk rotation center 14 inclined inwards, deviating from a Tangentiallinie. The surface line 20 and the composite line 10 of the relevant grinding segment 4 are preferably parallel to each other.

The core disk 2 has between adjacent disc pads 6 each a circumferential incision 22 respectively. 24 ,

According to in the 1 shown preferred embodiment, the circumferential cuts 22 and 24 different deep, wherein in the disc circumferential direction alternately a deeper circumferential incision 24 and a less deep circumferential incision 22 is provided. The use of differently deep circumferential cuts reduces the risk of cracking in the core disk.

In all embodiments of the invention is between the circumferentially successive abrasive segments 4 one clearance gap each 26 formed so that sanded material can easily migrate from the workpiece during the grinding process.

The composite line 10 closes with a radial line 30 at least in the longitudinal center of the disc connection surface 6 and the segment interface 8th at every grinding segment 4 but preferably also at any other point along the length of the segment interface 8th , an angle other than 90 °. Here, in the predetermined disc rotation direction 12 in front of the radial line 30 lying angle α less than 90 ° and the underlying angle β greater than 90 °.

The circumference cuts 22 and 24 are preferably slots that are open at the disk outer periphery. They close with the them in disk rotation direction 12 preceding composite line 10 or disc connection surface 6 a defined angle γ, which is preferably greater than 90 °.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 4424093 C2 [0002]

Claims (5)

Cut-off wheel containing a core disk ( 2 ) and a plurality of abrasive segments ( 4 ), which around the circumference of the core disc ( 2 ) on a same plurality of, seen in disk side view, rectilinear disk pads ( 6 ) are distributed and in each case a straight segment pad ( 8th ), which in each case at only one of the disc pads ( 6 ) is fixed inseparably, characterized in that the cut-off wheel has a predetermined disk grinding direction ( 12 ) has that each disk interface ( 6 ) and attached to it segment pad ( 8th ), seen in disk side view, a straight composite line ( 10 ), which in the predetermined disc rotation direction ( 12 ) towards the disk center of rotation ( 14 ) is inwardly inclined, deviating from a tangential line. Cutting-off wheel according to claim 1, characterized in that the radially outer surface ( 18 ) of each abrasive segment ( 4 ), seen in disk side view, is rectilinear and has a straight surface line ( 20 ) defined in the predetermined disc direction ( 12 ) towards the disk center of rotation ( 14 ) is inwardly inclined, deviating from a tangential line. Cutting wheel according to claim 2, characterized in that the surface line ( 20 ) and the composite line ( 10 ) of the relevant grinding segment ( 4 ) are parallel to each other. Cutting wheel according to one of the preceding claims, characterized in that the core disc ( 2 ) between adjacent disc pads ( 6 ) each have a circumferential incision ( 22 . 24 ) having. Cutting wheel according to claim 4, characterized in that the circumferential cuts ( 22 . 24 ) are of different depths, wherein in the disc circumferential direction alternately a deeper circumferential incision ( 24 ) and a less deep circumferential incision ( 22 ) are provided.