791results about How to "Large amount of deformation" patented technology

The invention discloses a method and a die for the forward extrusion and variable diameter bending extrusion of magnesium alloy semi-solid billets. The preparation method comprises a predeformation process and an isothermal spheroidizing heat treatment process, wherein in the predeformation process, uniform deformation of large deformation amount is realized by the die for the forward extrusion and variable diameter bending extrusion; cutting a magnesium alloy bar stock which is subjected to large deformation by a fixed size; heating the magnesium alloy bar stock cut by the fixed size at the temperature of between 520 and 580 DEG C under the protection of argon, and keeping the temperature of the obtained magnesium alloy bar stock for 10 to 30 minutes; and processing a bending extrusion angle of the die to be over 90 degrees. The method has the advantages of small predeformation resistance, large and uniform deformation, safety, reliability and no three-waste pollution. The grains of the prepared magnesium alloy semi-solid billets have fine size, are uniform and have a shape close to that of a sphere. The method solves the problem that the conventional SIMA method cannot continuously prepare the large-size semi-solid billets and meets the requirements of the semi-solid thixoforming workpieces for large-scale continuous production.

The invention relates to a test mode of a titanium alloy smithing technological parameter. The test mode has the steps that: (1) multi-forging various-direction smithing is performed on a titanium alloy steel bar to obtain an original structure which is as uniform as possible; (2) the steel bar after substituting forging is made into stocks under the temperature ranging from 30 to 50 DEG C below a Beta transformation point (TBeta); (3) the stocks are preheated for 1 to 2 hours under the temperature which is about 200 DEG C, and then are coated with special lubricant Ti-6 of a titanium alloy die forming; (4) the surface of a die is preheated until the temperature is more than 350 DEG C, the die forming is finished with 1 to 2 fire levels, and three different deformation amounts of 10 percent, 35 percent and 60 percent are obtained on a forgeable piece; (5) after the forgeable piece is processed through heat treatment, various types of mechanical property samples are get from the parts with different deformation amounts, and the quantitative relation between the parameters such as the smithing temperature, the heat preservation time, the deformation amounts, etc. and the mechanical property as well as microscopic constitutions is determined. A technician can adjust the sizes of the stocks according to the quantitative relation, and ensure reasonable deformation amounts on a stamp work, thereby obtaining the optimum matching between the plasticity and the fracture toughness.

An anticollision protecting fence material for highway is prepared from ultrahigh molecular weight polyethene (UHMWPE) through pre-swelling, dissolving and pugging in dual-screw extruder, extruding out for shaping, and stretching for strengthening. It has high longitudinal tension strength (100-180 MPa) and large longitudinal elongation rate at break (50-350%).

The invention provides a skin of a morphing wing, which is made from fiber-reinforced composite material (1). The skin is characterized in that: a shape memory alloy driver (2) is arranged between the two layers of the fiber-reinforced composite material (1); the wave trough of the upper layer fiber-reinforced composite material is internally filled with silica-based rubber (3) for meeting the requirements of smoothness, continuity and whole gas tightness on the surface of the wing; the fiber-reinforced composite material (1) and the shape memory alloy driver (2) are jointly pressed into to a corrugated structure under room temperature; the shape memory alloy driver (2) is in the shape of a high-temperature memory straight line; and the silica-based rubber (3) can be solidified under normal temperature. The invention also provides a drive method of the skin of the morphing wing. The skin of the morphing wing has the corrugated structure, thereby having high flexibility, large morphing amount and fast morphing response speed on the morphing direction, having high carrying capability on the perpendicular morphing direction, and having simple structure, light weight and reliable performance.

The invention discloses an upsetting and extruding precision die-forging forming method for large titanium alloy deep tube parts. The method includes that: firstly, enabling draft of a tube body die to range from 1 degree to 3 degrees, enabling the outer diameter of a blank to be 50% to 98% of that of a die tube body, enabling the height of the blank to be 60% to 150% of that of the tube body; spraying a protective lubricating layer with thickness ranging from 0.2mm to 3mm on the blank; heating the blank in an electric furnace under 5 DEG C to 50 DEG C of the temperature phase-transition point (alpha +beta/beta), enabling the heating coefficient to be larger than or equal to 0.6 min/mm, simultaneously preheating the die for 6h to 24h at a temperature ranging from 200 DEG C to 450 DEG C; finally, installing the die on a pressure machine, a die forging hammer or a counter-blow hammer, and forging the diathermal blank inside a die cavity. The upsetting and extruding precision die-forging forming method for producing the large titanium alloy deep tube parts is simple in procedure operation, stable and reliable in performance, and is easy to control quantity and to realize large-batch industrialized production of products.

The invention relates to a forming technology of superfine thin walled tubular products for vessel stents in the field of treatment, specifically to a method of processing cobalt-base alloy superfine thin walled tubes for novel coronary artery stents. The method solves the problems of great difficulty in tubular product processing and low yield of tubular products in a conventional technology. The method for forming finished products comprises the successive technological processes of smelting, forging, hot rolling, hot rolling punching, honing and cleaning of inner surfaces and outer surfaces, annealing, cold rolling/drawing, annealing, and repeated cold rolling/drawing. During overall process of the repeated cold rolling, diameter reducing deformation of the tubular products should be controlled in each pass, and match relationship between the diameter reducing deformation and wall reducing deformation should be well adjusted for guaranteeing that load carrying capability of inner walls does not exceed sigma b (breaking strength) and thus for preventing horizontal microscopic breakage. With rough blanks of the tubular products being acquired in high temperature conditions and the cobalt-base alloy tubular products being acquired through rolling at a room temperature, the processing method guarantees high dimensional precision, bright and clean inner and outer surfaces and excellent mechanical property of the tubular products; and is easy to realize and has high controllability and high economic benefit.

A press-fit terminal includes a pair of the resilient contacts being swelled outward, and having a deformation space into which the resilient contacts are deformed. The press-fit terminal is electrically connected to a conductive inner wall of a through-hole on a circuit board by pressing the press-fit terminal into the through-hole. The press-fit terminal includes abutting portions on each inner wall of the pair of the resilient contacts. When the abutting portions abut on each other, the abutting portions regulate deformation of the resilient contacts in a narrowing direction to narrow the deformation space. Then inclined walls formed on the abutting portions induce the resilient contacts to slide on the inclined walls in a direction to separate the resilient contacts from each other.

The invention provides a core sand mixing process, comprising the following steps of: (a) mixing ceramic sand and calcined sand according to the weight proportion of 4:6-6:4; and (b) primarily mixing the ceramic sand and the calcined sand for 20-30s, adding a curing agent into a mixture of the ceramic sand and the calcined sand, mixing for 50-60s, then adding heated core box resin, and mixing for 120-150s, wherein the addition amount of the heated core box resin accounts for 1.8-2.5% of the total weight of the ceramic sand and the calcined sand, and the weight of the curing agent accounts for 20-30% of that of the heated core box resin. The invention further provides a heated core box core-making process comprising the core sand mixing process. In the core sand mixing process, the ceramic sand and the calcined sand are adopted as raw sand, less abrasion is generated in a core making process, and the demoulding performance of sand cores is good; the consumption amount of the resin is lower so that more resin are saved and the cost is low; the sand cores of the ceramic sand and the calcined sand have good collapsibility and the cavity quality of a produced casting is better; and the ceramic sand resources are more sufficient.

A stationary scroll (40) is provided with a stationary side wrap (41) and an outer peripheral portion (42). The stationary side wrap (41) is formed into a spiral wall shape. The outer peripheral portion (42) is formed into a ring-like shape enclosing the periphery of the stationary side wrap (41). The movable scroll (50) is provided with a first flat plate (51), a movable side wrap (53), and a second flat plate (52). The movable side wrap (53) is formed into a spiral wall shape. Additionally, the movable side wrap (53) is caught between the first flat plate (51) and the second flat plate (52), with the movable side wrap (53) in mating engagement with the stationary side wrap (41). In the movable side wrap (53), the first flat plate (51) is formed integrally with the movable side wrap (53). Additionally, the second flat plate portion (52) is formed as a separate body from the first flat plate (51) and the movable side wrap (53) and is coupled to the first flat plate (51) with a bolt (62).

The invention discloses a deformation nose cone of an aircraft. The deformation nose cone comprises a plurality of annular body segments, a plurality of bending mechanisms, a front cone and a plurality of telescopic mechanisms. Each annular body segment comprises a first sub body segment and a second sub body segment, and a bending gap exists between each first sub body segment and the corresponding second sub body segment. The bending mechanisms are arranged between the first sub body segments and the second sub body segments and used for driving the first sub body segments to move between a straight position and a bent position. The front cone is arranged on the forefront of the annular body segments. Each telescopic mechanism is telescopically connected between the corresponding two adjacent annular body segments, located between the annular body segment at the forefront end and the front cone and used for changing the distance between the corresponding two adjacent annular body segments and the distance between the annular body segment at the forefront end and the front cone. The deformation nose cone of the aircraft in the embodiment has the beneficial effects of being capable of achieving complex deformation, large in deformation and the like.

The invention discloses a manufacturing method of a super-thick steel plate (thickness is 60 millimeters) and belongs to the steel plate production field of metallurgical industry. The manufacturing method of the super-thick steel plate comprises the following steps: firstly, sending a plate blank which is heated to a certain temperature and removed an oxide scale to cooling space to conduct forced cooling, surface temperature cooling a phase transition temperature of the super-thick plate material above Ar 1, then by short time temperature returning, the surface temperature rising to the range between 780 DEG C and 880 DEG C, and sending the plate bland to a rolling mill to roll as soon as possible; when the surface temperature of the plate blank being higher than 880 DEG C, needing to conduct the forced cooling again, and then conducting the subsequent rolling. A cooling-temperature returning-rolling process can be repeated for many times if needed till rolling to the needed thickness of the super-thick steel plate. The manufacturing method of a super-thick steel plate can increase dependent variable of the central area by increasing temperature difference between a surface layer and the central area and has the advantages of being beneficial to refining central organization and improving impact toughness, beneficial to removing center porosity of the super-thick plate, and capable of reducing double strand shape on lateral sides of the super-thick plates. The manufacturing method of a super-thick steel plate further has the advantages of being saving in investment, and flexible to operate.

The invention relates to a shearing-type metal bending energy-wasting damper which belongs to the field of civil engineering structural damping technology, in particular to a metal damper used for damping and wasting energy. The shearing-type metal bending energy-wasting damper is characterized in that an adopted core metal energy-wasting element is at least one metal plate that realizes the energy-wasting capacity by bending, wherein two ends of the metal plate are respectively and fixedly connected with an upper connecting plate and a lower connecting plate and vertical to the upper connecting plate and the lower connecting plate; and the thickness direction of the metal plate is accordant with the direction of the shearing force borne by a building structure. The shearing-type metal bending energy-wasting damper realizes the energy wasting by utilizing favorable plastic deformation capacity of steel products, and the like as well as larger deformation quantity by utilizing the bending deformation, is easy to be processed and convenient and flexible for use, can effectively improve the anti-seismic performance of the building structure and a bridge structure, and has novel and reasonable structure, strong applicability and wide market popularization and application prospects.

The invention discloses a preparation method of an electrified railway chromium-zirconium-copper contact line. Copper is taken as a substrate, 0.30-0.70% of Cr and 0.10-0.35% of Zr in percentage by weight are added into the substrate, and the total sum of impurities is no greater than 0.05%. The preparation method comprises the following steps: performing vacuum melting and vacuum horizontal continuous casting, thereby obtaining a long-length large cross section chromium-zirconium-copper continuous cast blank; performing full hot continuous rolling and on-line solid solution, thereby obtaining a long-length chromium-zirconium-copper line rod disc; drawing and peeling the disc, and performing cold continuous rolling, thereby reducing the diameter; further performing aging treatment to reinforce the disc; further performing cold continuous rolling by using a Y-type rolling machine, thereby pre-forming the line; and finally performing fine drawing formation once. The chromium-zirconium-copper contact line produced by using the preparation process is fine and uniform in grain, free of defect, high in strength, high in conductivity and high in softening temperature, and applicable to industrialized production.

The invention discloses a tool chip breaker, solving the problems of difficult chip breaking caused by great material plasticity and elasticity in the process of automatic processing and thin-cutting. The key of the invention is that a section of major first face and a first front angle are added in the cutting edge of a linear arc-shaped chip breaker, and the back of the major first face is a major second face; according to the parameters of cutting thickness, the major first face and the major second face, the corresponding curvature radius of an arc chip reeling slot is calculated. The tool chip breaker has the advantages that: as a section of the linear major first face is added in the cutting edge, the curvature radius of the arc chip reeling slot is reasonable, the chip deformation is increased, the effect of chip reeling and breaking is improved; the angle of the cutting edge is increased, the strength of the cutting edge is strengthened and the cutting depth is deepened; the new structure ensures that the chip goes into the chip reeling slot more smoothly.

The invention relates to a method for preparing a semisolid blank, utilizes an improved SIMA (strain induced melt activation) method to prepare the semisolid blank, and belongs to the technical field of metal semisolid blank. The method comprises the following steps of: firstly, measuring a liquid solid phase line point of the semisolid alloy to be prepared, then, heating an alloy blank so as to carry out asynchronization multitrack rolling or pillar squeezing transformation, finally, remelting, and carrying out heat preservation for a long time so as to obtain the required semisolid blank. The asynchronization rolling or pillar squeezing transformation is capable of generating large deformation amount, group bough crystal formed in the blank is destroyed, the asynchronization rolling is utilized to replace pre-deformation processes such as the existing upset, compression, equal diameter angle compression, and the semisolid blank is prepared and has the advantages of uniform formation, high nodularity, and accurate control solid phase rate.

An assembled type movable blast wall is formed by a plurality of blast wall units in an assembled mode. Each blast wall unit comprises a base, front pull rods, rear compression bars, a supporting frame, energy absorption layers and connecting bolts. Each supporting frame is fixed on the upper surface of the corresponding base, and one or more energy absorption layers are arranged inside each supporting frame in a filling mode. The energy absorption layers are formed by a plurality of prefabricated bodies which are made of EPS flow state concrete in an arrayed mode. A plurality of slide-resistant piles are distributed on the lower surface of each base. When multiple energy absorption layers are arranged, a middle layer is arranged between every two adjacent energy absorption layers. The assembled type movable blast wall can be deformed easily when undergoing impulse loads of the outside, the deformation is large, however, the flow stress level is quite low, in the compression deformation process, a large amount of power is consumed, the power is converted into energy dissipated in all sorts of modes like deformation, collapsing, fracturing and cell wall friction of holes in the structure, and thus the outside impact energy can be effectively absorbed. The assembled type movable blast wall further has the advantages of being rapid in assembling, low in cost and strong in stability.

The invention provides a variable cross-section twisting and molding device and method for a metal material, relates to a device and a method of a large plastic deformation technology, and aims to solve the problems of an existing twisting process that grain crystal refining can be realized only after a plurality of times of loading are carried out back and forth on the two sides and the production efficiency is low. The device is characterized in that a first twisting mould is composed of a first large cross-section rectangular channel, a first pyramid spiral channel and a first small cross-section rectangular channel in sequence from top to bottom; the cross section of the first pyramid spiral channel is reduced gradually from top to bottom; the cross section of the first pyramid spiral channel is rectangular; a first puncher pin is coaxially arranged above the first twisting mould. The method comprises the following steps: 1. the spiral angle is 10-60 degrees, the length of the spiral channel is 0.5d-3d and the extrusion ratio is 4-100; 2. a blank enters the first large cross-section rectangular channel under the effect of the first puncher pin; 3. the twisting angle of the blank is 90-180 degrees; 4. the variable cross-section twisting of the material is finished to form a part. The variable cross-section twisting and molding device and method for the metal material are used for preparing or machining and molding the high-performance metal material.

The heat insulating, forging and blank cogging method of large GH742 alloy steel ingot features the high temperature adhesive of marketable glass powder with softening temperature over 800 deg.c and the heat insulating material of marketable asbestos blanket with aluminum silicate fiber; the steel ingot heat insulating process including spreading glass powder onto the asbestos blanket and coating the steel ingot after heating at 900 deg.c; the heat insulating period of 5-6 hr; the blank cogging of heating at high temperature with forging time not less than 5 min, reducing amount of 30 mm and deformation amount not less than 50 %; and the performance test of the formed alloy blank. The present invention solves the difficult problem of hot blank cogging and forming large GH742 alloy steel ingot.

The invention provides a robot for drilling operation. The robot comprises a base, a rotary table and a mechanical arm, wherein rotary table is arranged on the base, the mechanical arm is hinged with the rotary table and comprises a front arm and a rear arm, and the front arm and the rear arm are of box grinder type structures. The robot for drilling operation, provided by the invention, adopts bionic structure design to realize reasonable structural layout; the front arm and the rear arm simulate an upper arm and a forearm of a human body to be designed to the box grinder type structures, the strength of the front arm and the rear arm is enhanced, and high deformation during robot operation is avoided; meanwhile, a horizontal connecting rod and a bearing connecting rod are arranged in the front arm and the rear arm, the strength is enhanced, and the appearance attractiveness of the robot is also improved; a master controller controls positioning accuracy of the robot via a proportional valve and an absolute encoder so that the robot can be accurately positioned; an image processing and positioning device is additionally arranged and used for accurately distinguishing the position of a drill rod; and a collision prevention sensor is arranged for the sake of safety during operation.

An ink-jet head 501 as a liquid transportation apparatus includes pressure chambers 514, and a piezoelectric layer 503 having individual electrodes 532 and a vibration plate 530. When W is a length in the radial direction of pressure chambers 514, and A is a length in the radial direction of portions of individual electrodes 532 to which a drive voltage is applied, the portions being formed at areas each overlapping with one side portion, in the radial direction, of the edge portion of one of the pressure chambers 514, the length A in the radial direction of individual electrodes 532 is determined based on a relationship between the value of A/(W/2) and an amount of deformation of the vibration plate 530 when the drive voltage is applied to the individual electrode 532, such that the amount of the deformation of the vibration plate 530 becomes great. Accordingly, a liquid transporting apparatus provided with the piezoelectric actuator which has excellent durability and more improved drive efficiency.