Abstract: A method for the dressing of a multi-thread grinding worm by a dressing roll, wherein the grinding worm has at least two screw channels which are arranged parallel to another, which screw channels extend helically around an axis of the grinding worm and wherein the dressing roll has at least two adjacent dressing profiles which are arranged along an axis of the dressing roll, wherein the dressing profiles of the dressing roll are guided simultaneously through adjacent screw channels of the grinding worm during the dressing of the grinding worm.

Abstract: A tool holder holding a tool according to the present invention includes: a tool mounting unit forming and penetrating a tool fixing hole having an interior diameter that is relatively smaller than an exterior diameter of a shank unit of the tool; and at least one shape memory alloy ring inserted and arranged to a ring fixing hole formed at the tool mounting unit to have an interior diameter that is relatively larger than the tool fixing hole, wherein an interior diameter size of the tool fixing hole is forcibly changed by deformation of a shape memory alloy ring by a heating source and a cooling source provided to the shape memory alloy ring for clamping or unclamping the tool.

Abstract: Full profile dressing roll (1) for dressing multi-start grinding worms for the generation grinding of small-module gears, comprising a groove-shaped axial section profile of the outer envelope surface (2), covered with hard material grains, and profile-cut hard-material profile combs (3) embedded in this envelope surface and having a multi-ribbed rack tooth system profile, the profile of which touches the outer envelope surface (2) of the dressing roll (1) only in sections of the axial section profile of the dressing roll (1) which do not participate in the generation of the grinding worm flanks. As a result, the profile sections, highly stressed during the dressing, at the crest and root of the profile grooves (4) are protected from high wear and premature grain loss and the service life of the dressing roll is effectively increased without the inhomogeneity of the flank surface of the dressing roll (1) being disturbed by the profile combs (3).

Abstract: A method of producing a grinding wheel is provided. An outer profile of an outer surface of the grinding wheel is formed with a rotary dresser element, so that the outer profile corresponds to a dressing profile of the rotary dresser element. An inner profile of an inner surface of the grinding wheel is formed with the rotary dresser element, so that the inner surface corresponds to the dressing profile of the rotary dresser element.

Abstract: The invention relates to a method for dressing of a multiple thread grinding worm, wherein the contour of the flanks of the screw channels which are running spiral-like and parallel to another is produced by a dressing tool. To obtain an improved grinding result especially with reduced dressing time the invention proposes that in at least two screw channels contours of the flanks are produced, which are distinguished from another by their geometry and/or by their surface structure. Furthermore, the invention relates to a method for grinding of a work piece and a grinding worm.

Abstract: According to the present invention, in a method for subjecting a roughly ground chamfer portion of a semiconductor wafer to helical grinding by relatively inclining the wafer and a second grinding stone to perform precise grinding, an edge portion of a discoid truer is formed into a vertically asymmetrical groove shape of a first grinding stone by using the first grinding stone having a vertically asymmetrical groove formed on a periphery thereof to grind the edge portion of the truer by the groove of the first grinding stone without being relatively inclined, a groove is formed on a periphery of the second grinding stone by relatively inclining the truer and the second grinding stone to subject the second grinding stone to helical grinding, and the chamfer portion of the wafer is precisely ground based on helical grinding by relatively inclining the semiconductor wafer with respect to a direction of the groove formed on the periphery of the second grinding stone.

Abstract: A method of producing a grinding wheel is provided. An outer profile of an outer surface of the grinding wheel is formed with a rotary dresser element, so that the outer profile corresponds to a dressing profile of the rotary dresser element. An inner profile of an inner surface of the grinding wheel is formed with the rotary dresser element, so that the inner surface corresponds to the dressing profile of the rotary dresser element.

Abstract: A dressing tool for profiling the tip area of a threaded grinding wheel used for continuous generation grinding. Concave working faces (13) are arranged in a cylindrical surface of the dressing tool (7) and coated with an abrasive coating. The pitch (P) of said working faces (13) corresponds to the pitch of the grinding wheel (3). The dressing tool (7) can be brought into rolling engagement with the grinding wheel (3) under crossed axes.

Abstract: The invention relates to a conditioning device (1) for grinding wheels (2) for machining the edge areas of plate-shaped objects, such as, for example, glass panes or the like, for which the grinding wheels (2), in a conditioned state, have at least one circumferential groove (3) each, which, at least in a partial section, tapers off towards the grinding wheel center. To provide such a conditioning device with which the conditioning of such grinding wheels is possible in an easy way and at any time and any place, the conditioning device has to have a cross section adapted to the cross section of the groove to be achieved, wherein the width of the conditioning device basically corresponds to the width of the groove(s) and the length orientation from one lateral end to the other lateral end of the conditioning device is configured in accordance with the depth orientation from one side edge to the other side edge of the groove(s) with growing length at increasing depth to be achieved.

Abstract: A forming device (100) for bevelling includes a base (102), a rail (104), a workbench (106) and a bar (108). A pair of support arms (114) extends upwardly from the base. An axle (120) is received in pivot holes (118) defined in the support arms. One end of the rail is fixedly connected with the axle. The workbench rests on the rail, and is slidably moveable along the rail. A beveller (132) is fixedly installed in a top surface of the workbench. The bar is fixedly connected to an opposite end of the rail. The bar includes a large bar (134) abutting the support plate, and a coaxial small bar (136). The rail can be adjusted to allow the forming device to bevel at an angle of less than one degree, by placing one or a combination of standard gauges between the small bar and the base.

Abstract: A forming device (100) for bevelling includes a base (102), a rail (104), a workbench (106) and a bar (108). A pair of support arms (114) extends upwardly from the base. An axle (120) is received in pivot holes (118) defined in the support arms. One end of the rail is fixedly connected with the axle. The workbench rests on the rail, and is slidably moveable along the rail. A beveller (132) is fixedly installed in a top surface of the workbench. The bar is fixedly connected to an opposite end of the rail. The bar includes a large bar (134) abutting the support plate, and a coaxial small bar (136). The rail can be adjusted to allow the forming device to bevel at an angle of less than one degree, by placing one or a combination of standard gauges between the small bar and the base.