50results about How to "Uniform wire diameter" patented technology

The invention discloses a preparation method of a Nd-Fe-B magnetic nanowire array. The preparation method comprises the following steps: neodymium chloride (NdCl3.6H2O), ferrous chloride (FeCl2.4H2O),boric acid (H3BO3) and de-ionized water are mixed to prepare NdFeB alloy solution; a complexing agent is added to obtain depositing liquid, wherein the complexing agent is glycine (NH2CH2COOH), ammonium chloride (NH4Cl) and ascorbic acid (C6H8O6); and graphite is used as an anode, an AAO template is used as a cathode, the Nd-Fe-B depositing liquid prepared in the last step is electrolyte, and a direct-current voltage-stabilization power supply is used for electrochemical deposition to finally obtain Nd-Fe-B ternary alloy magnetic nanowires. The obtained nanowires are high in number and deposition rate, arranged in parallel, ordered in height, uniform in diameter and higher in length-diameter ratio.

The invention discloses a device for manufacturing an electroplated diamond wire saw. The device comprises a wire unwinding chamber, a pretreatment tank, a sand feeding tank, a thickening tank, a drying chamber and a wire winding chamber; a cathode of the sand feeding tank is connected with a negative electrode of a power supply through a conductive shaft; a conductive cathode wheel is connected to the conductive shaft through a metal bearing; a base wire is wound on the conductive cathode wheel; the cathode of the thickening tank is also connected with the negative electrode of the power supply through the conductive shaft; the conductive cathode wheel is connected to the conductive shaft through the metal bearing; the base wire is wound on the conductive cathode wheel. According to the device disclosed by the invention, in the sand feeding tank and the thickening tank, each base wire is wound on the cathode wheel of the corresponding cathode so that the base wire becomes a negative electrode; each metal bearing mounted between the corresponding cathode wheel and the corresponding conductive shaft is capable of guaranteeing good electric conductivity and is also capable of making the corresponding cathode wheel rotate freely, so breakage of each base wire is prevented. In comparison with the previous conduction ways such as electric brush, the conduction way of the device disclosed by the invention is capable of enhancing the electric conductivity, free of loss, free of generation of graphite dust, and conductive to uniformity and wire diameter consistency of electroplated diamond particles on each base wire.

The invention discloses a method for making an electroplated superabrasive cutting wire, which includes a method for chemical composite plating on the surface of a superhard abrasive, wherein the surface of superhard abrasive particles is coated with a layer of nickel-phosphorus alloy by the method of chemical composite plating , the nickel-phosphorus alloy layer contains solid particles, and the solid particles are non-conductive particles. In the present invention, the surface of the superhard abrasive forms a nickel-phosphorus coating containing solid particles by electroless plating. The solid particles in the coating are non-conductors, doped in the nickel-phosphorus alloy, occupy a certain volume space, and reduce the conductivity of the nickel-phosphorus alloy. It can suppress the cathodic discharge reaction on the surface of the superabrasive deposited on the steel wire during the electrodeposition process, thereby avoiding the agglomeration of the superabrasive on the cutting line, making the diameter of the cutting line uniform, and eliminating the need for subsequent processes to remove The agglomerated superhard abrasive can correct the wire diameter, reduce the production cost and improve the production efficiency.

The invention provides an upper sand tank for producing a composite electroplating diamond wire and a use method thereof. The electroplating sand tank mainly includes the sand tank body, liquid inlet circulation device, liquid inlet distribution device, steel wire transmission device, etc. The device adopts the liquid inlet distribution device of the multi-stage distribution pipe to enter the liquid from the bottom of the upper sand area. The longitudinal distribution of diamond particles near the steel wire busbar inside is uniform, and the sanding rate of diamond micropowder on the steel wire busbar after electrification and electroplating is controllable, and the fine powder is not easy to agglomerate and is well distributed. The invention can continuously produce the electroplated diamond wire with good distribution of diamond micropowder, uniform wire diameter and excellent cutting performance, and has reasonable structure, high production efficiency and high utilization rate of raw materials.

The invention provides a piston extrusion nozzle of a 3D printer, which includes a heat preservation sleeve assembly, a detachable piston syringe inserted in the heat preservation sleeve assembly, and a piston rod for driving a piston rod to move linearly in a piston cylinder of the piston syringe. The drive module; the drive module includes a module motor arranged on one side of the insulation cover assembly, a lead screw connected to the output shaft of the module motor, and a slider pierced on the lead screw an assembly, wherein one end of the slider assembly close to the thermal insulation sleeve assembly is detachably connected to the tail end of the piston rod. The piston extrusion nozzle of the 3D printer of the present invention uses a detachable piston syringe to replace the conventional non-detachable piston cylinder, which can avoid the process of secondary transfer of biological materials and ensure that the biological materials are not polluted. One side of the insulation cover assembly reduces the overall height of the nozzle and increases the printing size.