440 results about "Diamond wire saw" patented technology

The invention relates to a diamond wire saw production method of a surface modified diamond, which comprises the following steps: 1. removing surface grease and surface metal oxides on the surface of the diamond; 2. placing diamond micropowder into a cationic surfactant solution, applying positive potential and forming a layer of positive charge film on the surface of the diamond under the electrophoretic action by action of a cationic surfactant; and 3. carrying out composite electroplating of a diamond wire saw. In the invention, conductive processing is carried out on the diamond, so that diamond grains can orderly move in a plating solution under the action of an electric field to realize the electroplating deposition on the surface of a metal wire without the influence of the size of the diamond grains; the surfactant is adsorbed on the surface of the diamond, so that a plating layer and the diamond present an infiltrative type interface, and a Ni plating layer has strong holding capability on the diamond; and the diamond micropowder has high utilization ratio. The invention has simple process method and convenient operation, the diamond grains have rapid deposition speed, good deposition uniformity and high deposition density on the metal wire, an electroplating layer has high holding force on the diamond grains, and the diamond micropowder has high utilization ratio. The invention can realize industrialized production and provides a method for efficiently and rapidly producing the diamond wire saw.

The invention relates to a method for manufacturing electroplating diamond wire saw. The invention has main features as follows: firstly, winding the metal lines on a string releasing wheel, continuous operating the metal lines, completing the fore treatment, pre-plating, sanding and thickening procedures, and finally winding the metal lines on a string receiving wheel to complete the electroplating process, wherein, the pre-plating, sanding and thickening procedures are completed in a same electroplating bath; sanding is completed by annular feather belt subsequent rotated in the electroplating bath; the diamond grinding medium in the plating solution is suspended in the plating solution under the mixing function, and naturally depositing on the annular feather belt; and the linear velocity passing through the annular feather belt and the metal lines of the annular feather belt are identical, so the diamond grinding medium on the metal lines and the annular feather belt has a definite relative still time, to ensure sanding time. The invention uses annular feather belt to perform sanding, improves sanding efficiency, improves the manufacturing efficiency of electroplating diamond wire saw and reduces the manufacturing costs.

The invention discloses a diamond fretsaw cutting method and device. An annular diamond fretsaw is used for cutting a crystal ingot workpiece; the annular diamond fretsaw surrounds a plurality of horizontal guide wheels and is tensioned by a tension mechanism; under the driving of one of the guide wheels, namely, a driving wheel, the annular diamond fretsaw operates at a high speed; under the driving of a lifting mechanism, the annular diamond fretsaw is fed to a crystal ingot cutting workpiece and retracts upward; and in a cutting process of the annular diamond fretsaw, the crystal ingot workpiece is driven by a rotary mechanism to rotate uni-directionally around a shaft of the workpiece. According to the method and the device, the annular diamond fretsaw has a higher linear speed; when a workpiece rotates uni-directionally and continuously, point contacting type cutting between the diamond fretsaw and the crystal ingot workpiece is realized; and diamond particles can be pressed into a cut material more easily, so that the device has a cutting efficiency about ten times of that of the ordinary fretsaw diamond cutting.

A method and apparatus for diamond wire cutting of metal structures, such as nuclear reactor vessels, is provided. A diamond wire saw having a plurality of diamond beads with beveled or chamfered edges is provided for sawing into the walls of the metal structure. The diamond wire is guided by a plurality of support structures allowing for a multitude of different cuts. The diamond wire is cleaned and cooled by CO₂ during the cutting process to prevent breakage of the wire and provide efficient cutting. Concrete can be provided within the metal structure to enhance cutting efficiency and reduce airborne contaminants. The invention can be remotely controlled to reduce exposure of workers to radioactivity and other hazards.

The invention relates to a sand feeding method for a diamond wire saw. The method comprises the following steps of: (1) preparing a diamond electroplating solution, wherein each litre of the electroplating solution comprises 10-20g of diamond, 100-240g of NiSO4, 40-100g of NiCl2, 10-50g of CoSO4 and 40-80g of H2BO3; (2) adding the electroplating solution to a sand feeding tower, wherein the sand feeding tower is in the shape of a column or polygon and is arranged vertically, and 2 to 8 Ni anodes are uniformly arranged on the inner wall of the sand feeding tower; and (3) making a bare metal wire penetrate into the bottom of the sand feeding tower and out of the tower top at a speed of 2-8 m/min; by adopting the bare metal wire as the cathode and Ni as the anode during the penetration of the bare metal wire, applying DC (Direct current) and plating diamond on the bare metal wire. The diamonds on the diamond wire saw prepared by the invention are uniformly distributed and are not accumulated.

The invention provides a preparation method and the product of a metal binder diamond wire saw, comprising the preparation steps of (1) steel wire surface, (2) plating auxiliary disposal of the steel wire, (3) burdening, (4) plating of steel wire and (5) post-processing. The thickness of the binder coating ranges from 1/2 to 2/3 of the grain diameter of the diamond. By a series of chemical and diffusion reaction, the surface of the steel wire is covered by a layer of uniform and firm coating 3; a diamond mill grain 2 is also uniformly held in a metal binding layer 1, thus achieving the cutting object.

The invention discloses an electroplating diamond fretsaw with grinding materials controllably distributed and a preparation method. The electroplating diamond fretsaw is composed of a steel wire base body and diamond grinding materials, and is characterized in that the diamond grinding materials on the fretsaw are electrically deposited on a surface of the steel wire base body according to a pre-arranged shape, and a chip removal groove is formed on a none-deposited-diamond surface of the grinding materials. The preparation method comprises the following critical steps: region selection and coating processing are conducted on the surface of the steel wire base body, and a reserved none-grinding-material surface of the steel wire base body is coated with a pre-arranged shape; sand-feeding process is conducted on surfaces of the steel wire base body, the steel wire base body enters an electroplating groove, and the diamond grinding materials are electrically deposited on an uncoated region of the base body; and coating removal processing is conducted on the surface of the steel wire base body, the steel wire base body enters a coating removal groove to remove the coating, and manufacturing of the diamond fretsaw is finished. The electroplating diamond fretsaw with the grinding materials controllably distributed and the preparation method have the advantages of being high in cutting efficiency, long in service life and the like.

The invention relates to a tensioning device of an underwater diamond wire saw, which comprises a tensioning wheel, a tensioning wheel axle seat, a tensioning force detection mechanism, an adjustment handle, a screw rod and a base, wherein the inner side surface of the base is in slide fit with the tensioning wheel axle seat, while the outer side surface is connected together with a frame of the diamond wire saw; the screw rod is positioned inside the tensioning wheel axle seat, and one end of the screw rod passes through the tensioning wheel axle seat to be connected and fixed with the adjustment handle; one end of the tensioning wheel axle seat is provided with an axle seat hole for the tensioning wheel axle seat to pass through so as to be positioned; and the tensioning force detection mechanism is sleeved on the screw rod and is positioned at one end of the tensioning wheel axle seat away from the axle seat hole. The tensioning device can ensure the initial tensioning force of a wire saw string bead wire, stable tensioning force during machining and convenient assembly and disassembly of the string bead wire; moreover, the tensioning device carries out realtime monitoring and controls the radial feeding speed of the string bead wire through a tension sensor, thereby ensuring safe, smooth, efficient and accurate cutting operation; therefore, the tensioning device can meet the requirements of large-diameter or multi-material filled pipes for carrying out cutting operation.

The invention discloses an electroplated diamond wire saw sand-applying device. The device sequentially comprises the components, from top to bottom: a vertical tubular sand-applying sub tank, a liquid-returning box, and a plating solution master tank. A guide wheel is fixed in the liquid-returning box. A core wire is sequentially wound on a wire-feeding conductive wheel on the bottom of the vertical tubular sand-applying sub tank and the guide wheel. The core wire then penetrates the vertical tubular sand-applying sub tank, and is finally wound on a wire-discharging conductive wheel on the top of the vertical tubular sand-applying sub tank. The wire-feeding conductive wheel and the wire-discharging conductive wheel are connected in parallel, and are then connected to the negative electrode of an electroplating power supply. Metal anodes are arranged around the core wire in the vertical tubular sand-applying sub tank. The metal anodes are connected with positive electrodes of the electroplating power supply. Through a water pump above the plating solution, the plating solution is lifted from the plating solution master tank into the vertical tubular sand-applying sub tank. With the device provided by the invention, sand-application of produced diamond wire is uniform and good. During the production process, current density is high, efficiency is high, internal stresses of the plating and the substrate are small, plating solution application amount is low, and wire breakage probability is low.

The invention discloses a real-time deviation correcting method for a precise cutting process of a diamond wire saw, which belongs to the technical field of precise cutting and machining of large-size artificial crystal. The method is characterized by comprising the following steps of: detecting the position offset of the diamond wire saw in real time by using a photoelectric position detecting element, and feeding back the position offset to a computer control system to control a workbench to perform corresponding position and angle adjustment so that the wire saw moves towards the direction of reducing the cutting deviation and the cutting deviation correction is realized. The method has the advantages that abrasion brought to contact detection and deviation correction of the wire saw can be avoided by adopting non-contact wire saw position detection and wire saw deviation correcting motion; and in addition, compared with a method for reducing cutting deviation by improving the precision of a machine tool, a deviation feedback-based deviation correcting strategy adopted by the invention has the advantage that: good deviation correcting effect can be achieved for wire saw precision cutting of a large-scale workpiece on the premise of not remarkably improving the manufacturing cost of a wire saw cutting system. Theoretically, the method can obtain highest deviation correcting precision of 17 microns.

The invention relates to a weak-interface and low-strength rock sample making apparatus and a sample making method thereof. The weak-interface and low-strength rock sample making apparatus is formed by arranging a diamond wire sawing machine, a workbench and a polishing machine on a pedestal, the workbench is provided with a cutting bench and a clamping rotating disc, and the diamond wire sawing machine is arranged across the pedestal through steel supports at two sides of the diamond wire sawing machine; the diamond sawing wire of the diamond wire sawing machine is wound outside two power wheels, and a cooling gas nozzle is arranged below the diamond sawing wire; the cutting bench comprises a cutting seat, a cutting rack, a clamping handle, positioning slots, a circumferential rotation device and a rotating hand wheel, the cutting seat is fixedly connected with the cutting rack through a vertical adjusting device, the cutting rack has two corresponding support bodies, the upper ends of the two support bodies respectively form the positioning slots, the upper end of one of the support bodies is provided with the circumferential rotation device, the circumferential rotation device is connected with a circular module, the upper end of the other one of the support bodies is provided with the clamping device, and the clamping device is connected with another circular module. The cutting process in the invention has small damages to a rock sample, so the cutting precision is high, and the cut surface is smooth.

The invention relates to a diamond wire saw manufactured by adopting diamond micropowder and also relates to a wire saw for solidifying the diamond micropowder on a steel wire matrix by using nickel-plated layer, whereas the surface of the diamond micropowder is provided with a metal carbide-plated layer, and the metal of the metal carbide-plated layer refers to titanium carbide, tungsten carbide or chromium carbide. Preferably, a metal layer is plated on the metal carbide-plated layer on the surface of the diamond micropowder; the metal of the metal layer refers to Ni or Cu, and the metal layer and the metal carbide-plated layer form the diamond micropowder of which the surface is provided with a metal carbide-metal composite plated layer. According to the diamond wire saw manufactured by adopting the diamond micropowder, a wire saw matrix and the diamond micropowder are firmly combined, and the use frequency of diamond is obviously increased; the diamond is high in exposure and is strong in cutting capacity. Compared with traditional methods, the tangential velocity and the feed velocity of the saw are obviously increased, and the production efficiency of the diamond is greatly increased.

The invention relates to a production method of a brazed diamond wire saw, comprising the following process steps: 1. a steel wire enters a vessel stored with paste solder; 2. the steel wire adhered with solder enters a first wire-drawing die to facilitate the steel wire passing through the first wire-drawing die to be evenly coated with a layer of solder; 3. the steel wire adhered with solder enters a sealed dust box which contains diamond powder with diameter being 20-30 mum, a blower device blows the diamond fine powder, and the steel wire adhered with solder is evenly coated with a layer of diamond powder after passing through the dust box; 4. the steel wire adhered with solder enters a second wire-drawing die and is evenly and tightly coated with a layer of diamond powder; 5. the steel wire adhered with solder enters the center of a coil of high frequency induction welding, the solder melts down instantly, and diamond and the wire are fixedly and metallurgically bonded; and 6. a roll-up wheel evenly winds the finished diamond wire by welding. The method of the invention has quick production speed, and the prepared brazed diamond wire saw has long service life.

The invention discloses a diamond wire saw, which comprises diamond grinding grains, a flaky base, a rubber plastic material layer and a center line positioned in the center of the rubber plastic material layer, wherein the diamond grinding grains are fixed on the flaky base, and the rubber plastic material layer covers all parts on the center line, the flaky base and the diamond grinding grains except cutting surfaces. The diamond wire saw has the advantages of simple manufacture process and low production cost and difficult falling of the diamond grinding grains in the wire saw in the cutting process.

The invention relates to a preparation method of a composite diamond fretsaw, which comprises the following steps: 1, taking protogenetic diamond micro powder with the granularity of 5-45 Mu m and crushed diamond micro powder, mixing uniformly according to the proportion to obtain mixed diamond micro powder; taking the mixed powder of tungstic oxide powder and molybdenum powder as well as the mixed diamond micro powder, and mixing uniformly according to the proportion; 2, heating the product generated in step 1 and leading in rinsed hydrogen to form a diamond micro powder matrix / tungsten-molybdenum carbide interface / surface-metallized mixed diamond micro powder of tungsten-molybdenum alloy; and 3, taking electronickelling watt solution added with the surface-metallized mixed diamond micro powder as the electroplate liquid and taking a steel wire rope as a cathode to carry out the composite plating of metallized diamond and matrix nickel on the surface of the steel wire rope so as to obtain the composite diamond fretsaw of the invention. The invention has the advantages of simple process and easy operation, the prepared product has good edging performance, excellent wear-resisting compressive property, high processing speed and long service life, the utilization rate of the diamond fretsaw is high, the section flatness and the glossiness are high, the method is suitable for industrial production, and the prepared product is particularly suitable for the cutting processing with high efficiency, high quality and high cost performance on gems and other high-value materials.

The invention relates to brazing diamond fret saw with grinding materials being arranged in order in a spiral shape and a manufacturing process thereof, belonging to the field of manufacturing of grinding materials and grinding apparatus. The brazing diamond fret saw is composed of a steel wire substrate, brazing bonding agent and diamond grinding materials which are arranged in a spiral shape. The key steps of the process are as follows: coating pressure sensitive adhesive on the surface of the steel wire substrate; evenly winding a fine metal silk thread or nonmetal silk thread on the steel wire coated with pressure sensitive adhesive in a certain thread pitch; arranging the diamond grinding materials; dismantling the metal silk thread or the nonmetal silk thread; arranging a layer of powdery brazing filler metal; heating to the melting of the brazing filler metal in vacuum or protective atmosphere; and fixing the cooled diamond grinding materials firmly on the surface of the steel wire through brazing bonding agent to form the brazing diamond fret saw with the grinding materials being arranged in order in a spiral shape. The fret saw has the advantages of long cutting service life and high cutting efficiency.

A method for preparing a composite brush plated deformation line diamond wire saw, comprising the following steps of: preparing materials, selecting diamond or surface metallized diamond and nonconductive free particles, ultrasonically washing, using distilled water to repeatedly wash and bake; taking a straight line metal wire with the diameter of 0.1-2 mm as a cathode and an electric brush plating pen as an anode, washing the metal wire, pre-brush plating the metal wire, and then washing with deionized water; electric brush plating an amorphous state plating layer, taking pre-brushed plated metal wire as a cathode and the electric brush plating pen as the anode, and electric brush plating the amorphous state plating layer to obtain the diamond wire saw; and deforming the diamond wire saw through a deformer, thermally processing to obtain a latter deformation line diamond wire saw. The preparation technology has a simple device, high production efficiency, and recycle use of plating solution; and the produced wire saw has few shortcoming, a good performance and a long service life.

The invention discloses a manufacture method for the tire casing of a diamond wire saw sintered type bead. The method comprises the following steps: 15 parts of iron powder, 25 parts of cobalt powder and 60 parts of copper powder are taken according to parts by weight for mixing so as to form iron, cobalt and copper prealloying power under normal temperaure, then 75 to 85 parts of prealloying powder, 10 to 15 parts of bronze powder and 5 to 10 parts of nickel chromium triangle alloyed powder are taken according to parts by weight for mixing so as to form pelletizing powder, finally proper diamond is added into the pelletizing powder so as to form the raw material of the tire casting, then cold press and hot press sintering and the like are performed on the raw material of the tire casting so as to form the tire casting. The tire casing of the diamond wire saw sintered type bead, manufactured by the invention, has an excellent holding force, the tire casing is firmly adhered to a steel base, the sintering activity of the tire body is greatly improved, the sintering temperature is lowered greatly, and the energy is saved.