36results about How to "Reduce plastic deformation resistance" patented technology

The invention discloses a manufacturing process of an aluminum alloy rim of a large vehicle, which relates to the manufacturing process of the rim. The manufacturing process of the aluminum alloy rim of the large vehicle comprises the steps of: A) blanking; B) prefabricating blank by swinging and grinding on a swing grinding machine; C) punching on a press; D) pre-forging by backward extrusion on the press through a backward extrusion mold; E) final forging on the press again; F) flaring and cutting edges; G) spinning on a spinning machine through a spinning wheel; H) performing thermal treatment; I) machining; and J) performing surface treatment. With adoption of a technique that combines swinging and grinding, backward extrusion and spinning, the manufacturing process not only improves the product quality, but also reduces the investment on the swing grinding device. The process has the advantages of being long in service life of mold, low in product cost, low in energy consumption during production process, and good in labor environment, and is suitable for mechanical automation and popularization.

The invention relates to a hydraulic extruding method for producing magnesium alloy wire or rod, and relative specific extruding mould, which can avoid crack and high cost or the like. The inventive method comprises that processing magnesium alloy blank, coating lubricant, and heating with era oil, heating hydraulic extruding mould and controlling temperature, arranging magnesium alloy blank, filling era oil, arranging movable convex mould, pressurizing and extruding. The inventive mould comprises a movable convex mould (26), under a convex mould (6) and coaxial with the convex mould (6), wherein the lower end of the convex mould (26) is through a convex mould through hole (8) at the middle of a convex mould press plate (17) to be mounted on the upper part of an extruding barrel (13), and the extruding barrel (13) is a multilayer cold press extruding one. The invention can obtain better physical property and surface quality, or the like.

The invention provides an atmospheric cold plasma jet auxiliary cutting method. Cold plasma jet generated under atmospheric pressure is used as a lubricating cooling medium during material cutting. Working gas enters a cold plasma jet generator from a working gas source via a pressure reducing valve and an adjustable flow meter, the flow of the working gas and output voltage of a high-voltage power source are adjusted so that uniform cold plasma jet is sprayed out from a nozzle outlet of the cold plasma jet generator, the temperature of the jet is the room temperature or is slightly higher than the room temperature, and a tool and workpiece interface and a tool and chip interface are always soak in the cold plasma jet during cutting by means of adjusting a spraying angle. Plasma can be generated in a dielectric barrier discharge mode, a suspension electrode discharge mode or a bare electrode discharge mode. The atmospheric cold plasma jet auxiliary cutting method is an environment-friendly cutting method, an excellent lubricating and cooling effects for various metal and nonmetal materials can be realized during cutting, accordingly, cutting force is reduced, the service life of a tool is prolonged, and the quality of the surface of a workpiece is enhanced.

The invention discloses a preparation method of a high-purity copper sputtering target, belonging to the technical field of sputtering targets. The method mainly comprises the following steps: carrying out upsetting and stretching plastic deformation on a high-purity copper target blank; cooling the target blank after multiple rounds of upsetting and stretching deformation; carrying out rolling deformation on the cooled high-purity copper target blank to prepare a high-purity copper target blank; and then carrying out thermal treatment on the target blank to obtain the high-purity copper target with fine and uniform tissues. The preparation method has the advantages that the high-purity copper target is prepared by adopting the method combining plastic deformation with thermal treatment; grains of the target prepared by the method are fine and are uniform in distribution, thus completely meeting the requirements of sputtering; meanwhile, the consistency and repeatability of the processing technology are ensured by adopting plastic processing equipment with controllability; the method is simple in process, flexible in equipment operation and high in production efficiency and is suitable for large-scale industrial production.

The invention relates to a micro-blanking forming device and a forming method, in particular to a high-frequency auxiliary micro-blanking forming device and a method for a foil plate. The device and the method aim at solving the problems in the existing high-precision blanking forming of the foil plate that an interval between a female die and a male die is small, a blanking force is significantly increased by a size effect, and the dies are badly worn and have short service lives. The device comprises a female die fixing plate, a lower bolster and a lower die plate that are sequentially connected from the top down, wherein an upper die plate and a male die fixing plate are sequentially arranged above the female die fixing plate; a female die is embedded into the middle part of the upper surface of the female die fixing plate; a vibration component and a punch are sequentially mounted in the male die fixing plate from the top down in an inserting manner; a middle line of the punch is coincided with that of the female die; the vibration component is connected with a high-frequency power source; a guide sleeve is mounted on the upper surface of the female die fixing plate in an inserting manner; the upper end of a guide column is mounted in the male die fixing plate in an inserting manner; and the lower end of the guide column is mounted in the guide sleeve in an inserting manner. The device and the method are used for blanking forming of the foil plate.

The invention relates to a cylindrical accessory machining method and system for a metal mold. The method comprises the steps that firstly, surface induction quenching pretreatment is carried out on a blank of a roughly-machined cylindrical accessory, and a hardening layer is formed on the surface of the blank; secondly, the pulse current is exerted on the blank, pulse current tempering treatment is carried out on the hardening layer on the surface of the blank, and meanwhile turning machining is carried out to form a semi-finished accessory; and thirdly, the semi-finished accessory rotates, the pulse current is further exerted on the semi-finished product, electroplastic treatment is carried out on the surface layer of the semi-finished accessory, and ultrasonic peening rolling is carried out on the surface of the semi-finished product through an ultrasonic rolling device. The system is formed through refitting on a lathe and is suitable for machining guide columns and various metal rotation body accessories through the method. Compared with a traditional technology, according to the method, the overall mechanical performance, the surface quality and the surface smoothness of the surface layers of the guide columns can be obviously improved, the production procedure is greatly simplified, the production efficiency is improved, and the production cost is reduced.

The invention discloses a high-performanceradialorientation rare-earth permanent magnetic tube and a thermal-deformationforming method thereof, and belongs to the technical field of rare-earth permanent magnetic seamless tube manufacture. A raw-material component of the permanent magnetic tube is RE-(Fe,Co)-B, wherein RE is or one or more ofyttrium or lanthanide elements which are represented by Nd, and one or more other transition metal elements can be added at the same time; a horizontal loading horizontal-type rotation double-motion extrusion device of which a connecting angle alpha is greater than or equal to zero degree and smaller than or equal to 90 degrees is adopted, firstly, hot pressing is conducted on rapid-quenching magnetic powder to form a full-densityisotropousmagnet, then, horizontal positive shuntextrusion is conducted on the full-densityisotropousmagnet to form the radialorientation permanent magnetic tube, the tube length is greater than 50 mm, and the tube diameter is adjustable in a range of 0-150 mm.The horizontal extrusion technology overcomes the spatial height limit of a vertical device, the long-range rheological property improves the magnetism and microstructure uniformity of the permanent magnetic tube, the permanent magnetic tube of which the length, diameter and wall thickness can be freely adjusted in a large size range can be prepared, which is beneficial for the batch production of the radialorientation rare-earth permanent magnetic tube. Through conducting saw cutting on the permanent magnetic tube, nanometer rare-earth permanent rings, magnetic tiles and ceramic chips can be obtained.

The invention discloses an auxiliary processing device for an electric pulse pipe fitting. The auxiliary processing device comprises a pulse power supply, a concave die, a core rod, insulating layers, a first positive electrode, a second positive electrode, a first negative electrode and a second negative electrode, wherein the first positive electrode and the second positive electrode are arranged on the inner surface of the concave die; the first negative electrode and the second negative electrode are arranged on the outer surface of the core rod; the first positive electrode, the second positive electrode, the first negative electrode and the second negative electrode are annular electrodes; the first positive electrode, the second positive electrode, the first negative electrode and the second negative electrode are connected with a pulse power supply; the insulating layers are uniformly distributed on the surfaces of the concave die and the core rod except the positive electrodes and the negative electrodes. According to the auxiliary processing device for the electric pulse pipe fitting, pulse current is introduced and an electro-plastic effect is used for enabling a raw material pipe fitting to be easily extruded and molded; the device disclosed by the invention is simple in structure, rapid in heating and high in working efficiency, and the cost loss and the energy source loss are reduced.

The invention provides a micro heat pipe electric-current-assisted rotary draw bending forming device and method, and belongs to the technical field of bent pipe manufacture plastic micro forming. Themicro heat pipe electric-current-assisted rotary draw bending forming device comprises a rotary draw bending forming machine, a mold assembly and a forming assisting power system. The mold assembly is installed on the rotary draw bending forming machine. The rotary draw bending forming machine is mainly composed of a fixed bottom plate, a pipe pressing assembly, a pipe bending assembly, a rotating shaft, a rotation drive mechanism and a control system. The rotating shaft is installed on the pipe bending assembly and is matched with a shaft hole in the fixed bottom plate. The pipe pressing assembly is fixed to the fixed bottom plate. The forming method includes the steps that firstly, the mold assembly is selected; secondly, a power-on loop is established; thirdly, parameters are set; fourthly, micro heat pipe blank heating and bending forming are conducted; fifthly, a bent piece is obtained through bending forming; and sixthly, the bent piece is taken out. By means of the micro heat pipe electric-current-assisted rotary draw bending forming device and method, micro heat pipe bending forming defects and forming precision can be controlled, and the problem that the heat conduction capacity is lowered after micro heat pipe bending is solved.

The invention relates to a static shaft shoulder friction stir welding device and method applied to container side wall splicing. A magnetic field vector module is arranged on the periphery of the bottom of a static shaft shoulder, and a magnetic field which rotates at a high speed relative to a to-be-welded plate with a stirring needle as the axis is generated through the magnetic field vector module; and the to-be-welded plate in the welding area is preheated, so that the welding efficiency of container side wall splicing is greatly improved, and the technical problems that traditional static shoulder friction stir welding is low in efficiency, even a stirring needle is broken, and welding fails are solved. Meanwhile, the welding area of the to-be-welded plate can be heated and pulsating vibration can be generated through the magnetic field vector module, the metal flowability in the welding process is improved, particularly, the metal flowability at the bottom of the to-be-welded plate is improved, a cavity behind a stirring needle is filled in time, the defect of dispersively distributed cavities is overcome, and the welding quality is improved. Grain refinement of a welding seam structure is facilitated, the welding seam structure is more uniform, the plastic deformation resistance of materials is reduced, the stirring head loss is reduced, and the welding quality is improved.