A method for slicing wafers from a workpiece using a sawing wire, wherein at least two wire guide rolls clamp a wire web, each wire guide roll having a multiplicity of grooves in its lateral surface, wherein at least one groove in which no wire is inserted during the wire sawing is present alongside a wire-guiding groove and, after wear on the wire-guiding grooves or after a defined number of sawing processes, the sawing wire is wound over into the previously unoccupied grooves that are not yet worn or used, respectively.

A method for simultaneously cutting a multiplicity of slices from a cylindrical workpiece, along strictly convex cutting faces, by supplying a suspension of hard substances in a carrier liquid, as cutting medium, to wire portions, while the wire portions, having a longitudinal tension, define a relative motion to the workpiece as a result of wire guide roller rotation with continual alternation between a first direction of rotation and a second direction of rotation, which is opposite to the first direction of rotation, wherein, during the rotation in the first direction, the wire is moved a first length, and during the rotation in the second direction, the wire is moved a second length, and the second length is shorter than the first, and at the cutting operation start a first longitudinal wire tension is greater than a second longitudinal tension at the end.

A method and apparatus for forming a starter notch along the length of a work-piece for subsequent fatigue testing. The starter notch is formed with a cutting wire such that it will promote fatigue-cracking in the work-piece in one defined direction and avoids cracking in directions other than the length direction of the starter notch. Improved fatigue-testing analysis may therefore be realized.

A portable working machine includes a working machine body, bolt members erected on the working machine body, a cover member configured to be attachable to and detachable from the working machine body, in which the cover member has through-holes through which the bolt members are inserted when attaching the cover member, fixing members configured to be fastened to the bolt members to fix the cover member attached to the working machine body, and a holding member attached to an outer surface of the cover member with a predetermined gap space between the holding member and the outer surface of the cover member, in which the holding member is configured to retain the fixing members on an outer side of the outer surface of the cover member when a fastening of the fixing members to the bolt members is released to prevent the fixing members from dropping off the cover member.

A reciprocating cutter system for use in spaces where a typical saw is unable to operate due to size, space, and operability limitations is disclosed. In at least one embodiment a reciprocating cutter system includes: a housing; a handle disposed on a top portion of the housing to provide an operator a user grip to operate the system; a cable saw coupled to the housing of reciprocating cutter system; a spring disposed within the housing and coupled to the cable saw such that as the cable saw is moved in a back-and-forth motion when in use, the spring also moves in a back-and forth-motion without the operator-held handle needing to move; and a connectivity bit, coupled to the cable saw, to connect the wire saw through the connectivity bit to a reciprocating device, the reciprocating device to provide the back-and-forth motion to the connectivity bit and the cable saw.

According to one implementation, a machining apparatus includes an electromotive saw and an attaching structure. The electromotive saw cuts off a workpiece to be machined. The attaching structure attaches the saw to an arm of a robot. Further, according to one implementation, a machining method is provided. In the machining method, a machined product is manufactured by processing a composite material or a honeycomb structure with a cutting tool attached to an arm of a robot. Further, according to one implementation, a machining method is provided. In the machining method, a machined product is manufactured by processing a workpiece to be machined with a cutting tool attached to an arm of a robot. The workpiece is processed along a shape of a jig for setting the workpiece. The workpiece is processed with contacting a guide with the jig. The guide is attached to the arm.

The disclosure relates to a portable power tool comprising at least one coupling device which can be coupled to a power tool separation device comprising at least one cutting unit and at least one guide unit for guiding the cutting unit. The portable power tool comprises at least one storage device which is provided to stow the machine tool separation device at least when it is coupled to the coupling device.

Slices are cut from workpieces during a sequence of cut-off operations by a wire saw, having a wire array. The wire array is tensioned in a plane between two wire guide rollers supported between fixed and floating bearings. During each cut-off operation, a workpiece is fed through the wire array perpendicular to a workpiece axis and the wire array plane. The workpiece is fed with simultaneous axial movement of the floating bearings by adjusting a temperature of the fixed bearings in correlation with a first correction profile, which specifies a travel of the floating bearings in dependence on the depth of cut. In dependence on the depth of cut, operating parameters are set, such as the feed rate, an amount of working fluid fed to the wire array per unit time, a temperature of the working fluid, a wire speed, a wire consumption per cut-off operation, or a wire tension.

A method uses a wire saw to cut slices from a workpiece. The wire saw has an array of saw wire tensioned in a plane between two rollers supported between fixed and floating bearings. During a cut-off operation, the workpiece is fed through the wire array with simultaneous axial movement of the floating bearings by adjusting the temperature of the fixed bearings with a cooling fluid in accordance with the temperature of the cooling fluid being in dependence on a depth of cut and correlating with a first correction profile, which specifies the travel of the floating bearings in dependence on the depth of cut. Also, the workpiece is fed through the wire array while simultaneously moving the workpiece along the workpiece axis in accordance with a second correction profile, specifying the travel of the workpiece. The first and second correction profiles are opposed to a shape deviation.

A wire saw apparatus for an excavator, according to the present invention, comprises: a support plate; an excavator connection part attached to the support plate so as to be able to be detachably attached to an excavator arm; a pair of guide rails attached to the support plate; an ascending/descending member which ascends or descends along the pair of guide rails; an electric motor for raising or lowering the ascending/descending member; a driving pulley rotated by a hydraulic motor attached to the ascending/descending member; a plurality of driven pulleys mounted to the support plate; and a wire mounted to the driving pulley and the plurality of driven pulleys.