A method for slicing an ingot, including: forming a wire row by a wire spirally wound between a plurality of wire guides and configured to travel in an axial direction; and pressing an ingot against the wire row while supplying a contact portion between the ingot and the wire with a slurry from a nozzle, thereby slicing the ingot into wafers. The slurry is supplied such that slurries whose temperatures are separately controlled by two or more lines of heat exchangers are respectively supplied from two or more sections of the nozzle which are orthogonal to a travelling direction of the wire row. Consequently, a wire saw and a method for slicing an ingot are provided which enable separate control of wafer shapes depending on ingot-slicing positions.

A method for slicing an ingot, including: forming a wire row by a wire spirally wound between a plurality of wire guides and configured to travel in an axial direction; and pressing an ingot against the wire row while supplying a contact portion between the ingot and the wire with a slurry from a nozzle, thereby slicing the ingot into wafers. The slurry is supplied such that slurries whose temperatures are separately controlled by two or more lines of heat exchangers are respectively supplied from two or more sections of the nozzle which are orthogonal to a travelling direction of the wire row. Consequently, a wire saw and a method for slicing an ingot are provided which enable separate control of wafer shapes depending on ingot-slicing positions.

A cutting blade mounting mechanism for mounting a cutting blade to a tip portion of a spindle includes: a blade mount mounted to the tip portion of the spindle; and an air supply unit supplying air to the blade mount. The blade mount includes: a columnar boss section inserted into a through-hole provided in an annular base of the cutting blade; a flange section projecting in a radial direction from a side of a base end of the boss section and having a support surface supporting the cutting blade; and an ejector type blade suction section having a first air passage connecting a supply port supplied with air from the air supply unit and a discharge port discharging air, and a second air passage connecting a suction port opening to a side of the support surface of the flange section and the first air passage.

A cutting blade mounting mechanism for mounting a cutting blade to a tip portion of a spindle includes: a blade mount mounted to the tip portion of the spindle; and an air supply unit supplying air to the blade mount. The blade mount includes: a columnar boss section inserted into a through-hole provided in an annular base of the cutting blade; a flange section projecting in a radial direction from a side of a base end of the boss section and having a support surface supporting the cutting blade; and an ejector type blade suction section having a first air passage connecting a supply port supplied with air from the air supply unit and a discharge port discharging air, and a second air passage connecting a suction port opening to a side of the support surface of the flange section and the first air passage.

A metal wire containing tungsten is provided. A tungsten content of the metal wire is at least 90 wt %. A tensile strength of the metal wire is at least 4000 MPa. An elastic modulus of the metal wire is at least 350 GPa and at most 450 GPa. A diameter of the metal wire is at most 60 μm. An average crystal grain size of the metal wire in a cross-section orthogonal to an axis of the metal wire is at most 0.20 μm.

An apparatus, system, or method for forming holes and shapes in surfaces may be disclosed. The apparatus may be a drain or drain-shaped tool which may be affixed to a drilling device. The apparatus may be fitted with an abrasive material, sharp edges, or a serrated edge to increase the performance and efficiency of the apparatus. The system and method may incorporate the use of a drilling device, such as a handheld drill or a drill press. A first step may involve affixing a drain to a drilling device. In a next step, the user may contact the drain drilling device with a work surface and may power on the drilling device. The hole created may be recessed such that the surrounding area is incrementally deeper closer to the hole in the center.

A silicon carbide ingot is cut using a wire. The silicon carbide ingot has a polytype of 4HSiC. The silicon carbide ingot includes a top surface, a bottom surface opposite to the top surface, and a side surface between the.top surface and the bottom surface. A direction from the bottom surface toward the top surface is a direction parallel to a [0001] direction or a direction inclined by less than or equal to 8 relative to the [0001] direction. In the cutting of the silicon carbide ingot, the silicon carbide ingot is cut from the side surface at a (000-1) plane side along a straight line parallel to a direction within 5 relative to a direction that bisects an angle formed by a [1-100] direction and a [11-20] direction when viewed in the direction from the bottom surface toward the top surface.

A rare earth magnet block is cutoff machined into pieces by rotating cutoff abrasive blades. Improvements are made by setting the blades on one side of the magnet block, rotating the blades, starting machining operation to form cutting grooves in the magnet block from one side, interrupting the machining operation, moving the blades to the other side of the magnet block, and restarting the machining operation to form cutting grooves in the magnet block from the other side, until the cutting grooves formed from the one and other sides merge with each other.

Disclosed is a punching assistant device. The punching assistant device includes: a first shaft arranged perpendicular to a working surface; a second shaft perpendicularly coupled to the first shaft; and a grinder mounting member coupled to the second shaft, wherein the grinder mounting member is rotatable around the first shaft.

Disclosed is a punching assistant device. The punching assistant device includes: a first shaft arranged perpendicular to a working surface; a second shaft perpendicularly coupled to the first shaft; and a grinder mounting member coupled to the second shaft, wherein the grinder mounting member is rotatable around the first shaft.