36results about How to "Reduce the number of drawing passes" patented technology

The invention relates to a high-carbon steel wire with good fine steel cord drawing machining performance. Chemical components of the steel wire include, by mass percentage, 0.60-1.00% of C, 0.10-0.60% of Si, 0.10-0.20% of Mn, 0.20-0.50% of Cr, smaller than or equal to 0.01% of S, smaller than or equal to 0.013% of P, smaller than or equal to 0.05% of Cu, smaller than or equal to 0.0010% of Ca, smaller than or equal to 0.005% of V, 0.0010-0.0040% of N, smaller than 0.0010% of solid dissolved N, smaller than or equal to 0.0030% of Al, smaller than or equal to 0.02% of Mo, smaller than or equal to 0.02% of Ni, smaller than or equal to 0.0005% of B and the balance Fe. Due to the fact that the key elements in the steel wire are optimized, the steel wire which has the good mechanical performance, a specific pearlite microstructure and more simple components is obtained, and the requirement for the good steel cord drawing machining performance is met.

The invention discloses an improved cold drawing mould of a seamless steel pipe and a cold drawing process thereof. The improved cold drawing mould comprises a cold drawing inner mould and a cold drawing outer mould, wherein a drawhole is formed on the cold drawing outer mould; the cold drawing inner mould is sequentially divided into a guide section, a conical wall-reduction section and a cylindrical uniform-wall section along the steel pipe drawing direction; and the entire structural strength of the cold drawing mould is improved. By adopting the cold drawing mould provided by the invention to draw a GCr15 bearing steel seamless steel pipe, the extension coefficient mu[sigma] of single-pass drawing of the pipe blank can be increased; and as the extension coefficient of single-pass drawing is increased, the drawing passes for drawing the seamless steel pipe of the same specification are reduced, the drawing yield is increased, the production period is shortened, and the production cost is lowered.

The invention discloses a large-diameter thin-wall cupronickel tube short process production method and belongs to the technical field of metal materials. Specific to the problems that large-scale extrusion equipment up to 5000 tons is needed to produce large-diameter thin-wall cupronickel tubes through a traditional technique of semi-continuous casting solid ingot casting, punching, extruding, acid pickling, drawing and annealing, the finished product rate is low and the cost is high, the invention provides a method for producing the large-diameter thin-wall cupronickel tubes. Hot and cold combination casting horizontal continuous casting is adopted to producing large-size cupronickel tube blanks, and then a hole enlargement or/and hole shrinkage drawing is adopted to machining and forming the large-diameter thin-wall cupronickel tubes. The method has the advantages of being small in equipment investment, short in technical process, free of acid pickling and the like. The outer diameter of horizontal continuous casting tube blanks is 110-350 mm, the wall thickness is 5-30 mm, the elongation coefficient of hole enlargement drawing pass is 0.80-1.0, and the elongation coefficient of hole shrinkage drawing pass is 1.1-1.5; the outer diameter of machined products is 100-320 mm, and the wall thickness is 3-20 mm.

The invention discloses a preparation method of an aluminum alloy welding wire, and belongs to the technical field of aluminum alloy. The preparation method of a high-performance aluminum alloy welding wire comprises the following steps of: (1) coldly and continuously rolling; (2) drawing; (3) shaving; (4) drawing a water tank; (5) carrying out light treatment; (6) cleaning by an ultrasonic wave, and (7) drying by hot air. The preparation method has the characteristics that a partial drawing procedure is replaced by a cold continuous rolling manner, and an aluminum alloy steel wire rod is subsequently processed after being rolled to have specific wire diameter once. Therefore, the drawing passes are reduced; the annealing passes are also reduced; the automation capability of the production process is improved; the utilization rate of the material is greatly improved; the production loss and the labor intensity are reduced; personnel quota is reduced; the production cost is reduced; the shaving procedure is carried out after the traditional water tank is drawn; the procedure is adjusted into the process of firstly shaving and then drawing the water tank; the welding wire is shaved when the wire diameter is large; an oxide skin at the surface of the welding wire is removed early; the welding wire is not easily broken due to high strength when the wire diameter is large; and the quality of the surface of the welding wire and the stability of the quality are greatly improved.

The invention relates to a fine forming equipment of a coating material which is pressed, ejected, core-filled and continuously casted and a technique, belonging to the pressure processing field in metal materials. The equipment consists of an upper crystallizer, a lower crystallizer, a temperature measuring instrument, a core metal temperature control furnace, an outer metal temperature control furnace, a core-filling tube, a pressure cover, a supporting plate, a secondary cooling device, a limiting device, a pressure sensor and a conceding device, wherein an outer metal crystallizer and a core metal liquid core-filling tube are arranged on a same axis along the continuous casting direction; the upper end of the core metal liquid core-filling tube is connected with a core metal temperature control crucible and the lower end thereof penetrates deeply in the outer metal liquid; the core metal liquid core-filling tube is used for isolating the outer layer and the core metal liquid to form an outer layer metal mold core; and the core metal liquid is casted. The pressure cover is connected with the edge end of the supporting plate and the inner side of the supporting plate is connected with a lower temperature crystallizer; an outer metal casting blank is ejected by applying pressure through the gas in the pressure cover. The invention eliminates cracks and oscillation marks which occur in common continuous casting blanks easily, can continuously cast the coating material by one time, and obtain a high-quality composite interface; and the follow-up processing production has low cost and high efficiency.

The invention relates to equipment for preparing an alloyed wire rod which is easy to be oxidated and difficult to be distorted. A smelting furnace adopts a non-vacuum induction smelting furnace protected by the atmosphere, holes are arranged on the side of the smelting furnace body, horizontal continuous casting crystallizers with different cross sections and specifications are installed at the side hole positions, the sprues of the horizontal continuous casting crystallizers are communicated with the smelting furnace body, draughting mechanisms are arranged at the outlet openings of the horizontal continuous casting crystallizers, and curling mechanisms are connected with the draughting mechanisms end to end. The horizontal continuous casting alloyed wire rod is realized through installing the horizontal continuous casting crystallizers with different cross sections and specifications at the side hole positions, for the sizes of the horizontal continuous casting crystallizers, different specifications and different cross sections are determined according to product demand, the draughting mechanisms realize that the wire rod advances at the specified casting draughting speed, the curling mechanisms realize to collect the alloyed wire rod, so that the length of the wire rod can be expanded, the invention is widely suitable for production equipment of the wire rod of easily oxidable alloys of Cu-Cr-Zr, Cu-Ti, etc., and difficultly distorted alloys of Cu-Ti, etc.

The invention discloses an induction heating auxiliary drawing device for preparing a capillary tube. The induction heating auxiliary drawing device comprises an induction heating device, a drawing mold, a vibration generator and a cooler. The drawing mold is provided with a shaft hole for the capillary tube to pass through before drawing. The induction heating device is arranged on one side of the shaft hole, and the vibration generator is installed on the outer surface of the drawing mold. The cooler is arranged on the other side of the shaft hole relative to the induction heating device, and the induction heating device, the drawing mold and the cooler are coaxially and oppositely arranged. The deformation temperature of the tube is increased through the induction heating device, and the plasticity of the tube is improved, so that the pass deformation is finally increased and the drawing pass is reduced; meanwhile, an ultrasonic vibration device enables the mold to vibrate, improves the friction condition and reduces the drawing force, finally, the pass deformation can be increased, the drawing pass can be reduced, and large-deformation drawing of the capillary tube is achieved through the multi-energy-field combined auxiliary drawing device.

The invention provides a stack mold drawing process for a nickel-based superalloy thin-wall seamless tube with a small diameter. Through matching between two drawing molds which are in different sizes and are arranged tightly front and back, the drawing passes of the superalloy thin-wall seamless tube with the small diameter are reduced, the production efficiency is improved, and the production cost is reduced; meanwhile, the defects of surface scratches caused by shaking and deviation due to small contact area between the tube and the mold surface in the single-mold drawing process, and stacking, creases, uneven wall thickness and the like caused by single-pass large deformation are avoided, and therefore the yield of the tube is improved.

The invention provides a drawing production method for an aluminum cladding optical unit. No drawing oil residues are generated through water drawing in the drawing process, the field environment is improved, and the expenditure and cost are reduced. A drawing position of a drawing die is put into an environment filled with water. An aluminum tube to be drawn passes through the drawing position of the drawing die in the environment where water surrounds the aluminum tube to be drawn to form the aluminum cladding optical unit with the corresponding diameter at a time after drawing. Drawing and direct take-up are completed under the action of rear take-up drawing. The invention further provides a tool device adopted in the drawing production method for the aluminum cladding optical unit.