35results about How to "Optimizing the drawing process" patented technology

The invention discloses a method for predicting the plastic deformation mode of multi-pass cold drawing of industrial pure aluminum wires based on ANSYS / LS-dyna, which mainly includes: establishing based on ANSYS parametric modeling technology according to the process parameters of pure aluminum wires and molds The solid model of the wire and the mold; according to the large deformation behavior of the wire during the drawing process, select the dynamic hardening material model and determine the parameters of the material model according to the tensile stress-strain curve of each pass wire; according to the wire drawing on the wire drawing machine The traction mode and pulling speed determine the loading mode and boundary conditions of the finite element model; finally, the defined finite element analysis model is submitted to LS-dyna for calculation, and the result file is post-processed with ANSYS, and the stress distribution and plastic deformation cloud diagram are output, and Draw the stress change curve from the core to the surface of each pass. The invention improves the existing wire simulation method, improves the calculation efficiency and calculation accuracy, greatly shortens the verification time of process parameters and reduces the design cost compared with the test method.

The application provides a crystal growth device and growth method, including a furnace body, a crucible, a cooling jacket and a flow guide tube, the cooling jacket is set inside the furnace body to cool the crystal, and the flow guide tube is set on the periphery of the cooling jacket , the guide tube includes an upper guide tube part and a lower guide tube part, the upper guide tube part is cylindrical and arranged around the cooling jacket, and the lower guide tube part is arranged at the lower end of the upper guide tube part and is located on the cooling jacket On the lower side of the crucible, the lower guide tube is a hollow upper, lower, and small circular platform structure. A groove is formed on the inner peripheral wall of the circular platform structure. The top of the groove runs through the circular platform structure, and the cooling jacket moves along the axial direction of the crucible. In this growth device, the cooling jacket moves along the axial direction of the crucible, which affects the distribution of the thermal field in the furnace body, and can fine-tune the temperature gradient at the solid-liquid interface, so that crystals in a defect-free growth area with a certain width can be drawn, which solves the problem of the existing technology. The temperature gradient at the solid-liquid interface is difficult to control, resulting in the pulling of crystals in the growth region with more defects.

The invention discloses a copper wire drawing device for cable production and a drawing method thereof, comprising a pay-off reel, a lubricating mechanism, a drawing host, a driving motor and a take-up reel, and the pay-off reel is arranged on the upper end of a first support frame , a lubricating mechanism is provided on the upper end side of the support base close to the pay-off reel, the lubricating mechanism is connected and communicated with the inlet end of the drawing main machine, and one end of the take-up reel is connected with the output end of the driving motor; the beneficial effects of the present invention: make The whole steel wire is evenly coated with a layer of drawing liquid, which is convenient for the later drawing of the steel wire, and the drawing liquid will not be sprayed to other mechanisms, which greatly improves the utilization rate of the drawing liquid. There is basically no rigid friction of the steel wire, which reduces the damage to the steel wire by the mechanism, ensures the quality of the final drawn steel wire, facilitates the application of drawing oil before drawing the copper wires of different specifications, and improves the flexibility of the drawing device. It takes up less space and is easy to promote and use.

The invention provides a method for preparing aluminum-clad steel wire, which includes the following steps: removing scale from carbon steel above grade 92A and lubricating the surface with high softening point lubricating powder, and then obtaining the required wire diameter through cold drawing process Steel wire; the steel wire is subjected to continuous isothermal quenching treatment to obtain a heat-treated steel wire with a sorbite conversion rate greater than 90% and a tensile strength greater than 1440Mpa; the surface of the heat-treated steel wire is polished, and then extruded and coated with a layer of aluminum to form a coated busbar; The coated busbar is stretched synchronously to the required wire diameter for multiple passes to form an aluminum-clad steel wire with a tensile strength greater than 2000MPa. The preparation method of the aluminum-clad steel wire provided by the present invention has simple steps and convenient operation. The lubricating powder with a high softening point is used to optimize the rough drawing production process, and the parameters such as the total compression rate and the pass compression rate are adjusted to optimize the bimetallic aluminum-clad steel wire. Drawing process, the prepared aluminum-clad steel wire has a tensile strength of more than 2000Mpa.

The invention discloses a hexagonal steel bar drawing machine tool. The hexagonal steel bar drawing machine tool comprises a base placed on the ground. A discharging table is fixedly mounted on the top surface of the base. A conveying base is fixedly mounted on the right side of the discharging table. When a steel bar is placed on the discharging table, a push plate is pressed backwards by a pushplate and drives a first push spring to press a pressure controller. The pressure controller controls a pushing cylinder to not start. The steel bar can be directly machined to form a hexagonal steelbar. Under the condition that materials do not need to be removed, the steel bar to be machined can be machined to form a required part and can be subjected to heating treatment first. The required shape of the hexagonal steel bar can be better formed through drawing of the treated steel bar. The steel bar is pushed through different ways. Raw materials of the steel bar can be prevented from beingdamaged during drawing.

The invention discloses a high-performance glass fiber and relates to the technical field of glass fiber yarns. The high-performance glass fiber consists of the following components in percentage by weight: 54.8-56.2% of SiO2, 10.5-12.5% of Al2O3, 19.8-21.3% of CaO, 3.2-4.5% of MgO, 23-25% of RO=(CaO+MgO), 2.9-4.1% of TiO2, 0.5-2.0% of K2O, 1-3% of ZnO, 0.1-0.5% of Fe2O3 and 1-2% of LiO2. Titanium and lithium are introduced, so that the structure of the glass fiber is changed for facilitating improvement on the mechanical strength, high temperature resistance and chemical stability of the glass. The high-performance glass fiber has a relatively low molding temperature and a relatively low liquid phase line temperature, can be used for reducing the glass devitrification risk and keeping relatively high mechanical strength, and is beneficial to good drawing of the glass fiber.

The invention discloses a method for melting copper through a line frequency furnace. The method comprises the following steps that 1, a waste copper piece and waste are subjected to primary treatment; 2, screening is carried out; 3, classification is carried out; 4, accessories are fed into furnaces, wherein the accessory I, the accessory II and the accessory III are fed into the shaft furnace, the open-hearth furnace and the line frequency cored copper melting copper to be refined, and a product I, a product II and a product III are obtained; 5, the product I and the product II are transported to a copper continuous casting and rolling unit for casting treatment, a steel rod is obtained, and the product III is placed in a pig casting machine to be machined and treated, and a copper ingot is obtained; and 6, the steel rod in the step 5 is drawn, and a qualified copper piece is obtained. The method for melting copper through the line frequency furnace achieves energy saving and is environmentally friendly, and manufactured steel is good in quality.

The invention provides a glass nanopore with a diameter less than 10nm, a preparation method and an application thereof for detecting DNA, directly optimizing a drawing parameter and a drawing processof a laser drawing device, and reducing the diameter of the conical glass capillary nanopore. By this method, glass micropore nanopores smaller than 10 nm in diameter can be easily obtained. The method is simple, direct and environmentally friendly, and does not rely on expensive vacuum equipment. The shrinkage of the glass capillary nanopore prepared by the invention not only reduces the concentration of detectable DNA, but also remarkably improves the DNA transporting signal and the signal-to-noise ratio, so that the method and the glass nanopore are expected to be used for DNA transportingresearch.

The invention discloses a preparing method of zinc-aluminum alloy welding wires, and belongs o the technical field of welding wire processing. According to the preparing method of the zinc-aluminum alloy welding wires, various processes such as melting, horizontal continuous casting, cleaning, tangential continuous extrusion with filling soldering flux, rotation forging and pulling are combined for preparing the welding wires. The preparing method has the advantages that the ingredients of the zinc-aluminum alloy can be controlled on line; the tangential continuous rod blank with the advantages of better surface smoothness, roundness and lower production cost is provided; continuous production, low energy consumption, uniform tissue performance and high production efficiency are realized, and the fully automatic / semi-automatic control of the process can be easily realized; the welding flux is compactly pressed, the tissue performance of the welding wires is good, thinner wire blanks with almost infinite length can be obtained, and higher pulling diameter reducing efficiency is realized. The preparing method of the zinc-aluminum alloy welding wires has the characteristics that the integral mechanical property of the welding wires is good, the welding flux loss is little, the production efficiency is high, the yield rate is high, the production automation degree is high, and the like.

The invention relates to the manufacture of an interface used for the combination of a liquid chromatographic separation system and a mass spectrum, in particular to a manufacturing device of a capillary spray interface used for the combination of liquid chromatogram and the mass spectrum, which comprises a 'U'-shaped bracket, two top ends of the 'U'-shaped bracket are respectively provided with a coaxial transverse sliding chute, hollow adjusting screw rods are respectively arranged in the sliding chutes and can transversely slide along the horizontal direction in the sliding chutes; the inner and outer surfaces of the inner side of the adjusting screw rod are respectively provided with internal screw threads and external screw threads, a PEEK head is screwed on the front end of the adjusting screw rod through the internal screw threads and internally passed by a polytetrafluoroethylene tube or a PEEK tube, an adjusting screw nut is arranged on the external screw threads; the interior of the 'U'-shaped bracket is provided with a high-temperature flame lamp; wherein, the inner chamber of the polytetrafluoroethylene tube or the PEEK tube is used for being sheathed with a quartz capillary. The device has simple manufacturing technology, uses raw materials with low price, and can comparatively and conveniently manufacture ideal mass spectrum spray interfaces with high mission success rate and good uniformity.