140results about How to "No residual stress" patented technology

The invention discloses a spraying liquid beam electrolytic-laser compound manufacturing method and device, which comprises the following steps: utilizing layer generating device to produce laser beam on the working piece, manufacturing hole, seam and groove, generating high-speed spraying liquid removing material with the same shaft of laser beam through spraying liquid beam device. The device contains layer, working piece assembling chuck, power and spraying liquid beam device, wherein the spraying liquid beam device concludes assembling seat of spraying device, insulating switching seat, cathode, focal lens, protective lens, insulating sleeve and sprayer.

The invention discloses an electric spark induction controllable erosion and electrolysis compound efficient machining method which is characterized by comprising the steps of: with electrolyte as a working medium, immersing one end of a to-be-machined workpiece electrode and a tool electrode in the working medium, intermittently introducing air to a machining area and forming an air film between the to-be-machined workpiece electrode and the tool electrode; generating electric spark discharge between the to-be-machined workpiece electrode and the tool electrode under the action of an electric spark power supply to ensure that the to-be-machined workpiece generates an oxidation exothermic reaction with the introduced air under the action of electric spark discharge ignition and forms a burning effect so that efficient ablation is realized; in an air closed stage, carrying out electrochemical machining and surface dressing on the ablation surface under the action of an electrolysis power supply; and alternating to start an electric spark ignition pulse power supply and an electrolysis eroding power supply and moving the tool electrode until machining is finished. The invention has the advantages of high material eroding efficiency up to be several times, even tens of times of that of the conventional electric spark machining and also be higher than that of the conventional electrolysis machining under the same electrical parameters on the premise of ensuring machining quality and precision, good surface quality, precision and controllability and capability of eliminating surface residual stress.

The invention concerns a mixture comprising by weight, the total being 100%, 1 to 100% if a polyamide block copolymer consisting of a basic polyolefin chain and on an average at least a polyamide graft wherein: the grafts are fixed to the basic chain by the radicals of an unsaturated monomer (X) having a function capable of reacting with a polyamide with amine terminal, the radicals of the unsaturated monomer (X) are fixed to the basic chain by grafting or copolymerization from its double bond; 99 to 0% of a flexible polyolefin with elastic modulus in flexure less than 50 MPa at 23° C. and having a crystalline melting point ranging between 60° C. and 100° C. Said mixtures are useful for making films, tanks, geomembrane protective fabrics produced by extrusion, products obtained by calendering, thermocladding/forming, protective films for electric cables and skins using slush molding technique.

The invention relates to a nickel sulfamate electroplating solution which comprises nickel sulfamate, boric acid and nickelous chloride. A formed nickel-plated layer which has favorable stability and is continuous and complete without pinholes, bubble shedding and residual stress is formed after a metal surface is plated by the electroplating solution. The smoothness and the brightness of the obtained plated layer are improved after a certain amount of brightener is added to the electroplating solution so that the metal surface is smoother and more attractive.

The invention discloses a preparation method of a foamed aluminum and alloy sandwich plate, which is characterized by comprising the following steps: (1) coating: selecting an aluminum and alloy panel, and compressing the aluminum and alloy panel and foaming powder to prepare a foamed aluminum and alloy sandwich plate blank; (2) welding: sanding and cleaning the welding surface of the foamed aluminum and alloy sandwich plate blank, clamping and positioning the foamed aluminum and alloy sandwich plate blank, and welding to obtain the foamed aluminum and alloy sandwich plate blank satisfying the specification and dimension requirements; (3) foaming: heating the welded foamed aluminum and alloy sandwich plate blank in a heating furnace at 300-600 DEG C for 10-40 minutes; and (4) cooling: cooling the heated foamed aluminum and alloy sandwich plate in the heating furnace, thus obtaining the well-welded foamed aluminum and alloy sandwich plate satisfying the specification and dimension requirements. The preparation method has the advantages of convenient preparation process and low processing cost; and the obtained foamed aluminum and alloy sandwich plate has fine performance.

The invention discloses a magneto-rheological high-precision positioning device and a magneto-rheological removing function transformation method. The device comprises a fixed supporting mechanism, an excircle positioning mechanism and an end surface positioning mechanism. The method comprises the following steps of selecting an optical element substrate which is conventionally processed to measure single point removing efficiency, establishing a removing efficiency contrast coefficient library, measuring the removing efficiency of four points by using a microcrystal material, converting the removing efficiency into the removing efficiency of a workpiece to be processed, adjusting the positions of the excircle positioning mechanism, the end surface positioning mechanism and a slide block through a hand wheel and a screw rod, placing the workpiece, performing emulating calculation on the workpiece surface error through the converted removing efficiency of the workpiece to be processed, and fitting a production machine tool code to perform numerical control machining. The magneto-rheological high-precision positioning device has the advantages of high integration level and high positioning precision as well as improving removing function accuracy, shortening measuring time, improving processing efficiency, reducing processing material cost and the like and can be used for quickly processing plane and high-gradient spherical surface, non-spherical surface and free spherical surface optical elements.

The invention relates to a device for high-frequency induction cladding with assistance with ultrasonic vibration and a working method for the device and particularly aims at surface treatment and reinforcement of a workpiece. The device comprises a horizontal machine tool, a PLC, a slide carriage tank, a triangular chuck, a power supply controller, a smoke removal system, an induction power supply, an infrared thermometer, an industrial water cooling circulation system, a guide rail, a ball screw, a nozzle, an ejector pin, an induction coil, an amplitude-change pole, a bracket and an ultrasonic generator. In the process of starting the induction coil for heating, and the PLC is used for controlling a motor to enable the workpiece to rotate at a certain speed (a specific speed value is obtained according to the fluidity of a molten pool in a state with assistance of ultrasonic vibration and the diameter of the workpiece), and unevenness in thickness of upper and lower cladding layers of the workpiece caused by the fact that the molten metal flows downwards due to gravity in the cladding process can be avoided. A gas protection device needs to be started before induction heating, sothat the workpiece is in an argon environment before being heated, injection of argon is stopped after the workpiece is thoroughly cooled, and the cladding layers and cladding layer influence regionscan be well prevented from being oxidized. By adding ultrasonic assistance equipment in the high-frequency induction cladding process, the quality of a bonding layer is improved to the maximum, generation of bubbles and cracks is reduced, the residual stress is eliminated, the comprehensive properties of the cladding layers are improved, the service life of the workpiece is prolonged, the production efficiency is improved, and the cost is lowered.

The invention relates to a compound ultrasonic fusion deposition additive-manufacturing device and a compound ultrasonic fusion deposition additive-manufacturing method, and belongs to the technical field of additive manufacturing. An ultrasonic enhancement device is fixed to a guide rod I and a guide rod II of an ultrasonic support platform; a moving base plate is installed on a guide rail I and a guide rail II of an X-directional guide connection system, and fixed to a synchronous belt simultaneously; the moving base plate is driven to move through an X-directional motor; and a fusion deposition additive-manufacturing system and the ultrasonic support platform are connected through a connection rod I and a connection rod II in the X-directional guide connection system. Parts with poor adhesion among fusion deposition wire materials and between the deposition wire materials and a deposition layer can be re-melted by virtue of ultrasonic vibration, and the deposition wire materials in formed parts are compounded into one piece, so that the comprehensive mechanical property of fusion deposition additive-manufactured parts, and in particular, the mechanical strength in the vertical direction of a forming axis, is remarkably improved.

The invention relates to a process for manufacturing and molding a double-layer plastic vehicle body, which comprises the following steps: (1) according to the profile of the vehicle body, manufacturing a concave die and a convex die respectively, and arranging outer edges on the bottoms of the concave die and the convex die respectively; (2) adding a plastic raw material into the concave die or the convex die, locking the concave die and the convex die through the outer edges on the bottoms thereof, performing heating, rotation, cooling and other steps, rotationally molding to form a hollow plastic vehicle body shell, and positioning the hollow plastic vehicle body shell in a shaping mould for shaping; and (3) foaming a hollow part of the hollow plastic vehicle body shell to form a middle foam plastic layer. The process adopts rotational molding to integrally shape the vehicle body shell, which can reduce the working procedures and simplify the process on one hand and makes the mould have simple structure, convenient processing and low manufacturing cost on the other hand; and meanwhile, a vehicle body product has the advantages of even wall thickness, no joint, difficult deformation and the like.

The invention relates to a device for producing the plate with figure on surface and relative method, which comprises: a basic material supplier, a condenser, a surface layer supplier, a rolling compression device, and a slicing device. Wherein, the basic material supplier provides basic material in fusing condition; said condenser cools said basic material to solid state; said surface layer supplier supplies a surface layer in fusion state on said basic material, then via said roller compression device to emboss said basic material and surface layer, to form a figure on said surface; and the slicing device slices the basic material and surface layer to attain the sheets in dual number.

The invention discloses a device used for welding a copper tube and an aluminum tube in refrigeration equipment and a welding method of the device. The device comprises a main device body and a working table, wherein the main device body comprises a main box, an alternating-current power source, a transformer, a high-voltage rectifier, a capacitor set, vacuum switches and a triggering device; the working table comprises a rack and a welding head, the welding head comprises an electric conducting coil and a magnetic flux concentrator, and the electric conduction coil is connected with all the vacuum switches through coaxial cables. The welding method includes the following steps that (1), one end of an outer tube is inserted in the magnetic flux concentrator, and one end of an inner tube is inserted into the magnetic flux concentrator; (2), a pulser is started, when a charging voltage reaches a set value, the system control triggering device turns on a discharging switch, and the outer tube and the inner tube are welded through magnetic force in the magnetic flux concentrator. The device used for welding the copper tube and the aluminum tube in the refrigeration equipment achieves normal-temperature welding, and is more convenient and faster to use, more environmentally friendly and lower in welding cost.

The invention relates to a clamp and technology for connecting metal unipolar plates made of materials with superplasticity performance into a bipolar plate in a diffusion manner. The clamp is composed of an upper pressing plate, a lower pressing plate, bolts and nuts. The technology for conducting super-plasticity connection on the bipolar plate through the clamp comprises the steps that firstly, the two metal unipolar plates are arranged between the upper pressing plate and the lower pressing plate, and the part, to be connected, of the metal bipolar plate is pressed through the upper pressing plate and the lower pressing plate via the fastening nuts; secondly, the clamp and the two metal unipolar plates which are fixed are put into a vacuum heating furnace, heat preservation is conducted for a certain time under the diffusion connection temperature, and the two metal unipolar plates are connected into one metal bipolar plate; and thirdly, the clamp and the metal bipolar plate are taken out of the vacuum heating furnace and cooled until the temperature in the furnace is lower than 50 DEG C, then the nuts are demounted, and the bipolar plate is taken out. According to the technology the metal bipolar plate made of the materials with the superplasticity performance is connected in the one-time heating and pressing process, the connector quality is high, and a connecting area is flat.

The invention discloses a preparation method of polytrimethylene terephthalate fiber with shape memory characteristics, including: firstly, selected polyester polymer is provided with at least 0.8dL/g of intrinsic viscosity and contains at least 85mol percent of polytrimethylene terephthalate, wherein, at least 85mol percent of the repeating unit is composed of three-methylene; secondly, the polyester polymer is melted and transported through a screw melting extruder, the melting body is metered through a metering pump and is extruded out through a spinneret, and as-spun fibers are drafted successively through a pair of drafting hot rollers after being cooled through lateral blowing; thirdly, the drafted fibers are introduced into a group of grouping roller stereotype boxes with steam; fourthly, tow is introduced into a winding head to be winded into mold. The fiber made through the invention has the advantages of good packaging appearance forming, good structural stability and soft handle. And with lower modulus, the fiber is still provided with good elasticity and tensile recoverability. The textiles made of the fiber which are produced through the process are provided with good shape memory characteristics.

The invention discloses a metal microstructure forming method which is applied to the manufacturing process of a microstructure component; by utilizing the metal microstructure forming method, a second type of metal is not needed to be electric-plated to surround the periphery of the metal and the second type of metal is not needed to be etched when a three-dimensional metal microstructure of the microstructure component is formed, therefore, the residual stress caused by electric-plating is reduced, no residual stress exists among the metal layers, a base plate attached by the metal is not deformed and the implementing of the follow-up manufacturing process of the microstructure component is not affected; in addition, as the second type of metal is not needed to be etched, the problem that etchants are permeated to the interface at each layer does not exist, adhesive force reduction at each layer can not caused, so as not to affect the functions of the microstructure component.

The invention provides a manufacturing method for an integrated panel with a thin-wall ultrahigh reinforcing rib. The invention relates to the manufacturing method for a thin-wall integrated panel, in order to solve the problem that an integrated panel component with a thin-wall ultrahigh reinforcing rib structure cannot be manufactured using the present welding, casting, forging and machining method. The manufacturing method comprises the following steps: 1) manufacturing a required panel blank using cutting and blanking methods; 2) preheating the panel blank and causing the internal temperature of the panel blank to be uniform; 3) preheating and lubricating a mold; 4) transferring the preheated panel blank onto a lower mold and positioning, and then utilizing an upper mold for pressure forming on the panel blank; 5) opening the upper mold, taking out the pressure formed panel-shaped part and cooling to room temperature; 6) machining, removing the material in a material storage area on the panel-shaped part by using a cutting processing method to obtain the final integrated panel with the thin-wall ultrahigh reinforcing rib. The method provided by the invention is used for manufacturing the integrated panel with the thin-wall ultrahigh reinforcing rib.

The invention relates to a spherical cathode numerical control electrochemical machining machine tool which comprises a machine tool body. The machine tool body is provided with a linear circular rail. The machine tool body is provided with a workbench. The workbench is provided with an insulating plate. The insulating plate is connected with a machining box in a closed mode. The linear circular rail is provided with a three-axis movement mechanism. A Z-direction movement mechanism and a C-direction rotating mechanism in the three-axis movement mechanism are fixedly connected. The C-direction rotating mechanism is provided with a spherical cathode through a fixture in a clamped mode. The spherical cathode is of a round-rod-shaped structure with a spherical head. The spherical head end of the spherical cathode is provided with a plurality of small holes. The spherical cathode is internally provided with through holes communicated with the small holes. One side of the machine tool body is provided with an electrolyte storage mechanism and a pumping mechanism. The pumping mechanism pumps the electrolyte in the electrolyte storage mechanism to the through holes in the spherical cathode, and then the electrolyte flows out of the small holes. In the flowing out process of the electrolyte, the spherical cathode is driven by the three-axis movement mechanism and the C-direction rotating mechanism to finish machining of workpieces.

The invention relates to a limited current type oxygen sensor which comprises an electrolyte layer and a compact diffusion barrier layer. The electrolyte layer and the compact diffusion barrier layer are both made of La1-xSrxGal-yMgyO3-delta, wherein 0.1<=x<=0.2, 0.1<=y<=0.2, and 0.1<=delta<=0.2. The sensor has good long-term stability.

The invention provides a method for controlling thickness of an optical remote sensor space truss rod adhesive glue layer, and belongs to the field of space optical remote sensor space truss structure integration. The method comprises the following steps that adhesive glue internal annular surfaces of the two ends of a truss rod are configured and trimmed so that the size of internal diameter and cylindricity are enabled to meet the requirement of thickness of adhesive glue; an annular thin sheet is adhered at the bottom end of an adhesive cylinder, multiple equal-thickness short thin sheets are evenly adhered at the top end of the adhesive cylinder in a circumferential direction, and a truss rod connector and the truss rod are matched until the truss rod connector can smoothly rotate a circle at constant speed in the truss rod without waggling; an adhesive agent is uniformly coated on the adhesive glue internal annular surfaces of the truss rod, and the adhesive agent is uniformly coated on the external surface of the adhesive cylinder so that thickness of the adhesive agent of both parts is enabled to be greater than 2/3 of the required adhesive thickness; the adhesive cylinder is aligned with the adhesive glue internal annular surfaces of the truss rod, and the truss rod connector is slightly pushed and leftward and rightward rotated until the truss rod and the end surface of the truss rod connector are contacted; and the residual adhesive agent is removed so that adhesion is completed.

The invention relates to a cathode for electrolytic machining of a small-size inner wall annular groove and a using method thereof, and belongs to the field of electrolytic machining and manufacturing. The cathode mainly comprises an external thread joint, a tool cathode base body, a hard insulation layer, a side wall insulation layer, a lubricating insulation layer, a metal plug, a main flow channel and branch flow channels; the interior of the tool cathode base body is of a through hole structure, and the bottom of the base body and the metal plug are welded into a whole; an annular groove structure and circular groove structures uniformly distributed in the circumference are formed in the hard insulation layer so that an electrolyte can be conveniently discharged; and the side wall insulation layer plays a role in reducing stray corrosion. According to the cathode and the using method thereof, through the transition fit between the bottom insulation layer and the inner wall of a round pipe workpiece, automatic alignment and horizontal positioning of the tool cathode and the inner wall of the round pipe workpiece are achieved; through the close fit between the lower end surface of the upper insulation ring and the upper end surface of the workpiece, automatic positioning of the tool cathode in the axis direction is achieved; and then, concentric and coaxial effects between the tool cathode and the inner wall of the round pipe workpiece are achieved, and the machining precision of the inner wall annular groove is improved.

The invention discloses a right-angle electrical connector with which the problem is not encountered even when the positions of the connection components of different types of terminals are not aligned in the vertical direction with respect to the circtui board prior to mounting. In a housing (10) are formed holding grooves (17A to 17D) that permit arm-use blades (20A-1 to 20D-1) of various types of blades (20A to 20D) to be inserted from the rear, connection components (33A-1 to 33D-1) provided to the lower ends of legs (33A to 33D) of conductive bar members (30A to 30D) of the various types of blades (20A to 20D) are located outside the housing (10), the arm-use blades (20A-1 to 20D-1) of the various types of blades (20A to 20D) are able to move in the vertical direction over a specific range within the corresponding holding grooves (17A to 17D), and the various types of blades (20A to 20D) are able to move within a holding space 17.

The invention discloses a drill rod connector which comprises a male drill rod, a female drill rod, a snap ring and nuts. An inner spigot is arranged on the lower end face of the male drill rod, chamfers are formed in orifices of the inner spigot, grooves are formed in the outer wall of the periphery of the male drill rod, an outer spigot matched with the inner spigot of the male drill rod is arranged on the upper end face of the female drill rod, grooves which are the same as those formed in the male drill rod are formed in the outer wall of the periphery of the female drill rod, two outer threads are formed in the outer wall of the periphery of the snap ring, the inner wall of the periphery of the snap ring is provided with sealing grooves and protruding blocks which are both symmetric up and down, the male drill rod is in location fit with the female drill rod through the inner spigot and the outer spigot, the snap ring is inserted into the grooves formed in the outer wall of the periphery of the male drill rod and the grooves formed in the outer wall of the periphery of the female drill rod through the protruding blocks, the male drill rod, the female drill rod and the snap ring are connected into a whole, and the two nuts are installed on the two outer threads of the outer wall of the periphery of the snap ring. The drill rod connector has the advantages of being reliable in sealing, capable of bearing forward and reverse rotating torque and convenient to assemble and disassemble.

The invention relates to a mechanical processing device and a method of ceramic-based complex curved surface parts with wave transmissivity. Most of parts of an aircraft are products with complex curved surfaces, the design and production cycle is long, and the processing workload accounts for more than 65% of that of the whole system; and a wave-transmitting radome has the characteristics of small dimension, compact structure and the like as a key part of a fairing of the aircraft, thereby affecting the flight performance of the aircraft. The device comprises a water storage tank (1), wherein a padding block (2) is arranged in the water storage tank, a workpiece (3) is mounted in the middle of the padding block, a fire poker (4) with a long circular hole is arranged on the padding block (2), the fire poker is fixed on the padding block by using a bolt (5) when pressing the processed workpiece, a water outlet (6) is formed below one side outside the water storage tank, and a water inlet (7) is formed above one side outside the water storage tank. The device is used for SiO2 fiber- toughened SiO2 ceramic-based composite materials, in particular to mechanical processing of the ceramic-based complex curved surface parts with the wave transmissivity.