215results about How to "Improve plastic deformation" patented technology

The invention relates to a current-assisted titanium alloy bellows hot-forming die and method, relates to a bellows hot-forming tool and method and solves the technical problem that integral heating in the plastic hot-forming process causes heat loss. The tool comprises an argon cylinder, a gas pipe, an axial loading shaft, an axial loading device fixing plate, a gas cylinder, an axial loading sleeve, a sleeve support plate, a bench, a positioning plate, positioning nuts, positioning studs, a sealing device, an electrifying device, a metal die frame, and a ceramic die. The method includes: keeping the temperature of 600-900 DEG C and inner air pressure 0.1-0.5MPa of a pipe billet for 100-250s, assembling the die, keeping the inner air pressure 2.0-3.0MPa of the pipe billet for 200-400s, powering off, relieving air pressure, and cooling to obtain a titanium alloy bellows. The die and method belonging to the field of bellows production have the advantages that heat loss consumed for the die during integral heating in the traditional plastic hot-forming process is avoided.

The present invention relates to a coated cemented carbide cutting tool insert particularly useful for turning of cast irons but also low alloyed steels at mediate to high cutting speeds. The cutting tool insert is characterised by a cemented carbide body comprising WC, cubic carbonitrides, a W-alloyed Co binder phase, a surface zone of the cemented carbide body that is binder phase enriched and nearly free of cubic carbonitride phase, and a coating including an innermost layer of TiC_xN_yO_z with equiaxed grains, a layer of TiC_xN_yO_z with columnar grains and at least one layer of Al₂O₃.

The invention discloses a current-assisted rapid hot forming device and method for long and thin high-strength-steel structural components, relates to the technical field of high-strength-steel hot forming, particularly relates to a current-assisted self-resistance heating forming device and method and solves the problems that existing rapid hot forming devices are complicated to energize and existing rapid hot forming methods are applied to materials of low melting points and low hardness. The device comprises a power supply, a die, a pair of sheet clamping electrodes, two cushion blocks and two insulating mica sheets, the power supply, the sheet clamping electrodes and a sheet to be formed form an energized loop, the sheet clamping electrodes and the rest part of the die are insulated, insulation is achieved through the high-temperature-resistant insulating mica sheets, and the sheet to be formed is not in contact with the die. The method comprises that joule resistance heat produced by a current passing the sheet is used for heating the sheet directly, and after the forming temperature is reached, the rapid in-situ stamping forming is conducted. The device and the method are used for manufacturing the high-strength-steel structural components for vehicles.

The invention provides a method for preparing a titanium steel composite plate through auxiliary hot rolling of pulse current. The method comprises the following steps that S1, a titanium plate, a steel plate and a middle layer material are prepared, and to-be-composited surfaces of the titanium plate, the steel plate and the middle layer material are subjected to treatment and cleaning thoroughly; S2, the titanium plate and the steel plate are subjected to vacuum assembling; S3, a heating device is heated to the designated temperature, a blank is put in the device, and vacuum heat preservation treatment is carried out for a certain time; S4, a roller gap and a rolling speed of a rolling mill are set in advance, the blank obtained after heat treatment is taken out to be put into a rollingmill inlet connected with a pulse power source device, an insulation push plate is used for pushing the blank into the rolling mill, and according to the certain rolling reduction and the rolling speed, rolling is carried out to obtain the titanium steel composite plate. According to the method for preparing the titanium steel composite plate through auxiliary hot rolling of the pulse current, theelectroplastic effect and the tip end effect of the pulse current are used, the two kinds of materials of titanium and steel achieve metallurgical bonding under the small reduction amount, and the titanium steel composite plate good in plate shape and high in combination strength can be obtained.

The invention discloses a preparation method based on single crystal copper bonding wire. The preparation method of the single crystal copper bonding wire is divided into two steps: (1) using continuous casting single crystal copper rod as the single crystal copper The starting material of the bonding wire, at the same time, the single crystal copper bonding wire is drawn by the drawing equipment driven by the AC servo motor with the microcomputer program control, active wire release, and the pulling force accuracy is less than 1mN; (2) The drawn single crystal copper bond The bonding wire is treated with electroplating precious metal palladium with a surface thickness of 0.5um~1um and an organic epoxy coating with a thickness of 1um for double-layer protection; in this way, a single crystal copper bonding wire with multiple protective coatings is finally obtained. Bonding wire has the advantages of low price, high elongation, good mechanical and electrical properties, and good oxidation resistance.

The invention discloses a warm electromagnetic forming device of a skin piece. The warm electromagnetic forming device comprises a base plate, a die, a plate material and clamping plate assemblies used for fixedly clamping the plate material, the clamping plate assemblies are arranged on the base plate, the plate material is fixedly clamped between the clamping plate assemblies, the warm electromagnetic forming device further comprises a discharge coil and heating pieces used for heating the plate material, the discharge coil is arranged above the plate material, and the heating pieces are arranged on the two sides of the plate material. The invention further discloses a warm electromagnetic forming method which comprises the steps of plate material fixing, plate material stretch forming,plate material heating, electromagnetic forming and the like; and complete attachment of the plate material and a forming face of a mold is achieved by repeatedly executing plate material stretch forming, heating and electromagnetic forming. The warm electromagnetic forming device has the advantages that the forming accuracy is high, the forming quality is good, the forming efficiency is high, andthe requirement of the equipment for the discharge energy and the coil strengthen is low.

In an inner link rank 9 of a silent chain before pre-stress is applied, hole pitches of outer link plates 3₇ are shortened as compared to those of inner link plates 3₈ and 3₉ (P 17<P18<P19), so that the hole pitches of the respective link plates are plastically deformed and are substantially lined up. Although the hole pitches of the respective link plates are substantially lined up after when the pre-stress is applied, the outer link plates in a width direction in the inner link rank has high fatigue strength by residual stress, so that the wear resistant performance of the chain may be improved.

A fusion joint has a cylindrical portion as a connecting portion and an annular welded portion arranged at a base end portion of the cylindrical portion, the welded portion configured to be thermally welded to a resin-made fuel tank. The cylindrical portion is constituted by using a resin alloy material in which modified high-density polyethylene obtained by introducing a functional group with a high affinity for the hydroxyl group of an ethylene-vinyl alcohol copolymer and ethylene-vinyl alcohol The copolymer is alloyed, and at least the welded portion includes an inner layer using the resin alloy material and an outer layer using at least one of high-density polyethylene and modified high-density polyethylene and covering the inner layer on the outside.

The invention discloses a method for depositing a low-stress coating by utilizing supersonic speed laser. Hard phase particles and soft phase particles with appropriate particle size and shape are subjected to ball-milling mixing in certain proportion, and the mixed powder particles are subjected to supersonic speed laser deposition on pretreated matrixes of different materials and shapes, so that the low-stress coating is obtained. According to the technical scheme, the soft phase is uniformly distributed in a high hardness coating, great plastic deformation is formed, and internal stress in the coating can be absorbed and eliminated, so that a compact and crack-free coating is obtained; besides, on the interface of the coating and the matrixes, a soft phase enrichment layer is generated in situ, transition action on bonding of the high hardness coating and the matrixes is realized, and interface bonding strength of the coating/matrixes is obviously improved.

A wooden member joint structure having high strength against load repeatedly applied in opposite directions, with improved work efficiency in joining the wooden member to a mating member. A screw member having spiral protrusion on its outer peripheral surface and an axial hollow hole is threaded axially into a wooden column. A distal end of joint bolt is threadedly engaged with bottom of the hollow hole. The joint bolt has an integrally formed flange, and the flange is threaded into the column together with the screw member with its contact surface firmly pressed against end face of the screw member. A joint device is clamped between a fastening nut threadably mounted on a proximal end of the joint bolt and the flange and coupled to the screw member via the joint bolt. The joint device is secured to a foundation by an anchor bolt protruding therefrom and a fastening nut.

The invention relates to a magnesium alloy profile and a preparation method and application thereof. Grains in the magnesium alloy include first phase grains and second phase grains dispersely distributed between the first phase grains. The first phase grains are micro grains. The size of the second phase grains is 50-230 nm. Compared with a profile prepared through a traditional casting method, the magnesium alloy profile has the characteristics that the tissue structure is refined, the first phase grains and the second phase grains are uniform, and the size of the second phase grains is 50-230 nm. The magnesium alloy profile has the advantages of high corrosion resistance, high tensile strength, high yield strength and high plastic deformation and can meet the requirement for medical instruments implanted in human bodies.

A low-cost super-plastic titanic alloy consists of Al 3.0-6.0wt%, V 2.0-4.0wt%, Mo 1.0-3.0wt%, iron 0.5-2.0wt%, Cr 0.5-2.0wt%. It achieves low cost and easy plastic deformation.

An electromagnetic clutch includes a motor, a worm wheel rotatably driven by a motor, a rotor having an electromagnetic coil and rotatable about a same rotational axis as the worm wheel, an armature that is mounted to the worm wheel and is pulled into contact with the rotor upon application of electric power to the electromagnetic coil, so that the armature is rotated with the rotor, a cover member configured to cover the rotor and the armature, and a power supply mechanism disposed between the cover member and the rotor and connected to a power source for supplying power to the electromagnetic coil. The power supply mechanism includes a fixed frame body having a first power supply portion for receiving the power from the power source and fixed to the cover member, a rotary frame body having a second power supply portion in contact with the first power supply portion for supplying the power to the electromagnetic coil, the rotary frame body being fixed to the rotor and rotatably engaged with the fixed frame body; and a plate-like conducting member provided in the cover member, the conducting member coming into contact with a portion of the first power supply portion projecting from the fixed frame body.

The invention discloses a method for preparing 160MPa grade low-yield-point building aseismicity steel. The steel comprises the following chemical components in percentage by mass: 0.001-0.005% of C, less than or equal to 0.02% of Si, 0.10-0.8% of Mn, 0.01-0.06% of Al, less than or equal to 0.01% of P, less than or equal to 0.004% of S, less than or equal to 0.004% of N, 0.01-0.08% of Ti, 0.0005-0.001% of B, and the balance of Fe and inevitable impurities. Through a series of processes of fine smelting, continuous casting, heating, rough rolling, electromagnetic sensation heating, fine rolling, laminar cooling, coiling and the like, the yield strength of the 160MPa grade low-yield-point building aseismicity steel achieves the 140-180MPa grade, the ductility is greater than 50%, good plastic deformation and impact toughness are achieved, and meanwhile an alloy is relatively low in cost and good in welding performance and low-cycle fatigue property, and the process is easy to achieve.

The invention discloses a manufacturing method of a drawing die face on a handle of an outboard door panel of an automobile. The manufacturing method comprises the following steps that: when the drawing die face on the handle of the outboard door panel of the automobile is manufactured, a border of an A face (1) of an area of the handle of the outboard door panel is extended along self curvature to form a border extending section (11); the border extending section (11) is intersected with a straight-line section (2) which forms an included angle of 8 degrees-15 degrees with the A face (1); the straight-line section (2) is continuously extended to form a drawing wall (4); the drawing wall (4) and a punching direction form an included angle of 20 degrees-25 degrees; and the drawing wall (4) is extended to be intersected with a binder face (5). The drawing die face belongs to the field of components of the outboard door panel of the automobile. The invention also disclosed the outboard door panel of the automobile. The phenomenon that the A face on the handle of the outboard door panel is easy to deform is effectively improved, the plasticity deformation rate of the outboard door panel is improved, and the rigidity is improved.

The invention discloses a thermal magnetic multi-field coupling electronic control magnetofluid compression molding 3D printing forming device and a method. The device is mainly composed of a conveying system, a temperature control system, a control system, a printing system and the like. The conveying system is composed of a motor, a conveying belt, a conveying guide rail and the like. The temperature control system is composed of an electromagnetic heater and a temperature sensor, the temperature sensor is connected with the electromagnetic heater, the temperature of magnetofluid is controlled by the temperature sensor, and the magnetofluid is made to reach optimized thermal molding forming temperature. The control system achieves control of an integrated system. The printing system is composed of a drawing meter, a permanent magnet, a magnetofluid vessel, the magnetofluid and the like. According to the thermal magnetic multi-field coupling electronic control magnetofluid compression molding 3D printing forming device and the method adopting the device, thermal molding forming is carried out on foam materials through high-temperature magnetofluid wave crests generated with the drawing meter as the center, the 3D printing technology is adopted, a compacting tool set or roller embossing equipment is avoided, cost is reduced, efficiency is improved, and patterns in any complex shape can be formed.