公开(公告)号：US20210323122A1

公开(公告)日：2021-10-21

申请号：US17270983

申请日：2019-08-23

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Marijke van der Meer ,  Jean-Luc Rifaut

IPC: B24D3/34

Abstract: The invention relates to an abrasive article 1 for abrading at least one workpiece, the abrasive article with: a carrier body 2, at least one abrasive layer 3 with a main surface and a predefined thickness, the at least one abrasive layer being arranged on the carrier body, at least two visual indicators 6 with a cross-section in the main surface of the abrasive layer, wherein the size, shape and/or location of the cross-section of the visual indicators in the main surface of the abrasive layer depends on the thickness of the abrasive layer at more than one location of the visual indicators.

公开(公告)号：US20210069867A1

公开(公告)日：2021-03-11

申请号：US17052876

申请日：2019-05-15

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Marijke van der Meer

IPC: B24D5/06

Abstract: The invention relates to a grinding wheel for the material-removing machining of at least one workpiece, preferably a grinding wheel for the simultaneous material-removing machining of at least two flat workpieces, wherein the grinding wheel is provided with a base body and a grinding layer arranged thereon for the grinding machining of the at least one workpiece, and wherein the grinding layer comprises a plurality of surface segments, wherein, in each case, a plurality of surface segments is provided both in the circumferential direction and in the radial direction. In order to specify a grinding wheel with which both harder and softer workpieces can be machined with good machining results and good wear behavior of the grinding wheel, the grinding layer should comprise at least two different types of surface segments with different degrees of hardness.