Abstract: An automatic machining device for machining a high-speed rail pantograph carbon contact strip is sequentially provided with a milling position, a sawing position and a chamfering position, and comprises a rack, a band sawing machine, a workpiece milling device, a workpiece chamfering device, a CNC computer numerical control system and a pneumatic system. A carbon contact strip workpiece to be machined is arranged on the rack and is sequentially subjected to milling, sawing and chamfering machining; and a saw frame of the band sawing machine is also provided with a saw band upper guide servo rotating device and a saw band lower guide servo rotating device, and the saw band upper guide servo rotating device and the saw band lower guide servo rotating device can freely, synchronously and correspondingly rotate a band saw blade within a certain range.

Abstract: A method of making a glass forming apparatus with reduced weight includes forming a cavity in the glass forming apparatus and expanding the size of the cavity by abrasively removing material from the glass forming apparatus through application of a wire saw.

Abstract: The present invention uses an Oscillating Disc Cutter (ODC) in a controlled manner to cut rock for assay purposes. The ODC (1) is mounted in an elongate guide frame typically in the form of an open box channel (2). The ODC is located on a carriage (3), the carriage itself mounted on guide rails (4) within the channel (2). The apparatus includes drive means operable to drive the carriage (3) in a rectilinear manner along the rails (4) such that the rails (4) define a cutting path. The ODC cuts a groove of controlled width and depth in a rock face, yielding rock chips that can be used for accurate assay of the face.

Abstract: Block-cutting gangsaw with vertical frame for cutting granite or other hard materials, comprising a blade-holding frame (19) that is supported with the possibility of reciprocating movement on an independent oscillating frame (40) which imparts the oscillating movement to it, so that each blade (20) of blade-holding frame (19) is always in contact with workpiece (18), and the contact area moves along a convex, curved trajectory.

Abstract: An automatic insulation block milling machine is disclosed. The machine combines a series of operations into a single, automatic, production-line machine. Blocks of rigid insulation material, such as cellular glass blocks, are fed into the automated machine. The blocks are first placed on an automatic programmed moving conveyor belt and are first cut on a pre-determined angle developed from the horizontal and vertical centerline of the block. This cut is made by an angled, vertical band saw mounted with its blade in the center of the moving conveyor, thus producing one angled side on each of the two cut blocks. The remaining three primary sides of the cut blocks are machined to create curved sectional blocks that are used to cover the outer surface of large bore pipe systems or other cylindrical items such as tanks.

Abstract: Apparatus for forming a multiplicity of thin wafers from at least two similar blocks, the apparatus comprising a supply reel (1) to supply wire, an upper pair (3a, 3b) and a lower pair (3c, 3d) of parallel spaced roller guides and a collection reel (4); a wire from the supply reel passes around successive grooves along the roller guides from near the supply reel to near the collection reel, so to form a four sided continuous web of wires along the length of the roller guides. Part way along the roller guides, the wire is diverted around at least two pulley wheels(5a, 5b) removing the wire from the web after it has passed over a roller guide at a predetermined point, and reintroducing the wire into the web via a subsequent roller guide at a point laterally displaced from the point at which it left the web, so that there is a gap in the web of wire which divides the web into two separate sections, and no cutting action can occur in that gap.

Abstract: The present invention features a reciprocating wire saw particularly adapted or configured for cutting hard materials. In one aspect, the reciprocating wire saw comprises (a) a flexible wire; (b) a plurality of cutting segments fittable onto the flexible wire, wherein each of the cutting segments comprises an outer surface; and a (c) plurality of superabrasive particles braze bonded onto the outer surface of the cutting segments to form a cutting wire. In another aspect, the reciprocating wire saw comprises a plurality of superabrasive particles braze bonded directly to the wire itself to form a cutting wire. The cutting wire is unique in that it comprises a pre-determined superabrasive particle concentration and is configured to cut various materials, such as granite, in a reciprocating manner.

Abstract: A saw blade for medical, in particular surgical, applications having a recess for mounting the saw blade inside a saw which exerts an saw movement, especially an oscillating saw movement, to the saw blade. In order to improve the dynamic behavior of the saw blade, longitudinal flat areas of a surface of the saw blade are provided with a plurality of superficial impressions of a defined contour that are aligned at an angle to the longitudinal axis of the saw blade.

Abstract: In the sawing process and device according to the invention, the pieces to be sawed are mounted on at least one support table and caused to bear against a layer of wires. Inclination structure in the form of wedges or pieces for angular adjustment by pivoting and blocking, are provided to mount the pieces obliquely with angles of inclination between one of their prismatic surfaces and a horizontal working plane. There is thus obtained a precise beginning of sawing with sawed slices of equal thickness and a careful end of cutting without chipping.

Abstract: A cutting blade is fixed on a shaft that rotates about its shaft center, and that is linearly advanced by an advancing movement. The shaft's center further revolves with a small radius of revolution at a rapid predetermined rate of revolution greater than the rate of advancing movement. Thus the blade is pressed against and cuts a substrate and produces chips, and the blade is intermittently disengaged from the substrate whereby the chips move in the direction in which the blade rotates to be removed from between the cutting edge of the blade and the substrate. This reduces working resistance, enhances working efficiency, and prevents the blade surface from having significant frictional heat. Furthermore, the generated frictional heat can readily dissipate and the blade can thus have a long life.

Abstract: The invention refers to a method for cutting blocks of stone (12), by means of a gangsaw (1) provided with diamond sector blades (35), comprising, besides a reciprocal approaching movement between the blades (35) and the block (12) and a periodical reciprocating movement of the blades (35), also a cyclic movement of approaching and moving away of the blades (35) relative to the block (12) and a hunting movement of the blade-holder frame. (FIG.

Abstract: A device for simultaneously separating a multiplicity of wafers from a hard brittle workpiece having a longitudinal axis, with a wire web made from saw wire and with an advancing device which brings about a translational relative movement, which is perpendicular to the longitudinal axis of the workpiece, between the workpiece and the wire web of the wire saw, in the course of which movement the workpiece is passed through the wire web, wherein the wire web is formed from a multiplicity of individual wires, and wherein there is a device for holding and rotating the workpiece about the longitudinal axis.

Abstract: The vertical blade saw assembly for ceramic and masonry materials is designed to provide an assembly that allows the user to make cuts of any shape to ceramic tiles and masonry materials in order to permit the installation of precision cuts for a particular setting. The assembly has an electric drive motor that is protected from the coolant used to keep the blade from overheating. The assembly has a plurality of parallel arms that are connected and permit the oscillating motion of the arms. The vertical blade is connected to the arms which place the blade in motion. The assembly has a base unit to provide support for the assembly. A coolant tray is positioned around the base unit. A water pump and accompanying tubing is used to circulate the coolant to the blade. Several cutting blades are also disclosed.

Abstract: The invention provides a rock drilling bit with a plurality of cutting teeth raked into the cut of the drilling bit. Such teeth are oriented at an angle of at least about 30 degrees relative to an imaginary line normal to a front surface of the cutting head from which the cutting teeth project. Such an arrangement provides the desired shear cutting force against the rock face while simultaneously reducing the shock and vibration applied to sonde housing and the drill string. The bit according to the invention may further incorporate a rear, frustoconical crushing surface that defines a space or zone crescent-shaped in cross-section that narrows from front to rear, and an improved replacable tooth for use on a rock drilling bit.

Abstract: A cutting machine by wires includes: groove rollers; wires moving by being tensioned by guide grooves of the groove rollers; and a holding mechanism for supporting a work piece for movement linearly into contact with the wires; wherein the holding mechanism is constituted so as to pivot the work piece.

Abstract: Multifunctional blade designs for rotational oscillating cutting include, in one aspect, different cutting teeth segments and cutting agent segments arranged along separate portions of a common cutting edge to carry out various cutting tasks. In another aspect, non-circular cutting blades have separate cutting edge segments, each segment having different cutting teeth or cutting agents. The blade edge may include one portion having grit bonded to the cutting edge to cut hard objects, and another portion having cutting teeth for cutting softer objects. Likewise, the blade edge may include two portions, each having cutting teeth of differing size and pitch to cut differing materials. Another embodiment comprises a triangular blade, the sides of the triangle provided with cutting grit bonded to the edges. Alternatively, at least one side of the triangle may include cutting teeth, so that each side of the triangle is adapted to cut different types of materials.

Abstract: An angularly reciprocating pivotable yoke, driven by a motor or a power t, is attached to respective ends of an abrasive coated cable or wire blade to draw the blade back and forth over a workpiece and provide cutting thereof, particularly in close quarters where little clearance is provided adjacent a workpiece. A telescoping housing includes a movable protective cover for protection of both the user and the mechanism. A safety switch is provided for preventing operation of the mechanism when the protective cover does not cover moving parts of the mechanism. A pivotable support for attachment of the ends of the blade to ends of the pivotable yoke is preferably of cylindrical form and which has a slotted aperture for receiving the blade and a recess for receiving an enlarged blade end, preferably formed by a piece of tubing crimped to the blade.

Abstract: An apparatus for percussively milling slots in rock or the like includes a flat disk-like radial boring tool mounted on a drive shaft which is rotated slowly against the work while being driven percussively and radially outwardly toward the work in the neighborhood of, for example, forty times for every revolution of the tool.

Abstract: An improved vertical gang saw is provided for sawing blocks of stone or the like. By this new design, the vertical saw frame is slued or swung about the center of the blades during each reciprocating movement. This design combines the following features:(a) the vertical frame (5) being supported at the center (13);(b) straight line guides (6 and 7) connected to said frame and positioned respectively at one end (21) and in the center (13) of the saw frame (5); and(c) the pivotal point of the straight line guide (6) being moveable perpendicular to the stroke of the frame and dependent thereupon.The perpendicular movement of the straight line guides can be accomplished by connecting them with a cam (10) which is driven off of the flywheel (3). Through this combination, all of the saw blades cut the stone block workpiece in both the up and down directions.

Abstract: Machine for stone blocks' sawing.The sawing machine includes a frame mounted in order to pivot around a horizontal axis (6) and wearing two saw blades (8) on each side of this frame, the cutting edge of the blades (8) having an arc shape which center coincides with this horizontal axis (6).Means are provided to animate the frame with an oscillating movement around this horizontal axis (6) and to have a forward movement horizontally of the stone blocks (23) in direction of the saw blades (8).The machine is used for cutting particularly hard stone blocks in slabs (FIG. 1).

Abstract: A machine for sawing stones, of the kind having one or more reciprocable blade-carrying frames, is disclosed, wherein an actuating mechanism for said blade-carrying frame is provided, which moves said frame(s) substantially parallel to itself along a preselected elliptical path. A few embodiments of the machine are disclosed: one of these presents quite particular an approach by which the stresses on the pivotal and connection pins are considerably reduced by exploiting appropriate balancing contrivances, such as counterweights located at appropriate points of the specially provided balancing connecting rods. A longer service life is thus provided both to the blades and the machine as a whole.