Abstract: An additive repair device for internal threads is provided. The device includes a moving assembly, a rotating assembly, a speed regulation assembly, a gear assembly, an additive assembly, and a connecting assembly. The moving assembly includes a drive part and a linear movement mechanism. The additive assembly is connected to the linear movement mechanism through the connecting assembly. One end, which is far away from the drive part, of the linear movement mechanism is connected to an input end of the speed regulation assembly through the gear assembly. The rotating assembly includes a clutch mechanism and a clamping mechanism. The clutch mechanism includes a clutch outer gear and a clutch inner gear. The clutch outer gear is arranged at an output end of the speed regulation assembly. The clamping mechanism is fixed to one end, which is far away from the speed regulation assembly, of the clutch inner gear.

Abstract: A wire-feeding electromagnetic spray additive manufacturing device and method are provided. The device includes a housing, an alternating current power box is fixedly installed on the housing, and a stirring needle is also arranged in the housing. The device further includes a fixed seat fixedly installed in the housing, and a heating coil is arranged between the fixed seat and the stirring needle; a lower end of the stirring needle is provided with spinnerets and heating channels adapted with corresponding the spinnerets respectively; upper ends of the heating channels penetrate through the stirring needle and are fixedly connected with the housing, and an extrusion assembly is fixedly installed on each of the heating channels; and a smoke pipe is fixedly installed on the extrusion assembly, and an upper end of the smoke pipe penetrates through the housing and is connected with a negative pressure fan.

Abstract: A manufacturing method of amorphous nanocrystalline composite materials includes following steps: S1, transferring raw materials through a feeding mechanism; S2, generating metal droplets from the raw materials under an action of one of an electric spark and an electric arc through a pulse power supply; S3, transporting the metal droplets below a flying plate under an action of a transmission medium; S4, generating a magnetic field force through electromagnetic pulse coils disposed on the flying plate to drive the flying plate to impact the metal droplets onto surfaces of substrates; S5, repeating the S1 to S4, thereby forming dense amorphous nanocrystalline composite materials. The pulse power supply is utilized to generate the metal droplets from the raw materials under the action of the electric spark or the short electric arc, and then the metal droplets are formed to the dense amorphous nanocrystalline composite materials.

Abstract: A method for preparing aluminum foam sandwich material by rotating friction extrusion and electromagnetic pulse hybrid process includes: step 1: preparing the filler; step 2: processing the filler to prepare a plurality of preforms; step 3: clamping and fixing the plurality of preforms to form a preform assembly; step 4: welding the panel on the surface of the preform assembly to form an non-foaming sandwich material; step 5: heating and foaming the non-foaming sandwich material through a foaming mold; step 6: insulating the foaming mold after completion of foaming; injecting cooling water into the foaming mold after completion of insulation to maintain pressure and shape, forming the aluminum foam sandwich material of the required shape. The aluminum foam sandwich material produced by this method has good interface bonding, no adverse interface reaction, high bending resistance, impact resistance, and excellent sound absorption and insulation properties.

Abstract: A flexible adaptive large length to thin ratio pipeline intelligent repair device is provided. The walking mechanism includes a walking bracket and a radius adjustment assembly. The radius adjustment assembly is located in the middle of the walking bracket. The first motor for driving the radius adjustment assembly is set in the middle of the walking mechanism, and the second motor for driving the movement of the walking bracket is set on the walking bracket. The ends of several groups of connecting rods are removably connected to the working part, which includes the pre-welding sandblasting mechanism, the heating mechanism and the welding repair mechanism. A positioning sensor is set on the walking bracket. The variable-diameter all-position intelligent pipe internal repair device can integrate pre-welding cleaning, preheating, welding repair and post-welding heat treatment.

Abstract: The present invention discloses an electromagnetic pulse-aided friction stir lock welding processing device and method, which comprises an upper die body and a lower die body. The upper end of the lower die body is provided with a frustum-shaped settling tank. The lower end of the upper die body is provided with a tip inserted into the settling tank, an outer wall of the tip is fitted with an inner wall of the settling tank, a gap for placing parts to be processed is arranged between the upper die body and the lower die body.

Abstract: A method for preparing aluminum foam sandwich material by rotating friction extrusion and electromagnetic pulse hybrid process includes: step 1: preparing the filler; step 2: processing the filler to prepare a plurality of preforms; step 3: clamping and fixing the plurality of preforms to form a preform assembly; step 4: welding the panel on the surface of the preform assembly to form an non-foaming sandwich material; step 5: heating and foaming the non-foaming sandwich material through a foaming mold; step 6: insulating the foaming mold after completion of foaming; injecting cooling water into the foaming mold after completion of insulation to maintain pressure and shape, forming the aluminum foam sandwich material of the required shape. The aluminum foam sandwich material produced by this method has good interface bonding, no adverse interface reaction, high bending resistance, impact resistance, and excellent sound absorption and insulation properties.

Abstract: An electromagnetic pulse additive device for a connection ring of a heavy-lift carrier rocket is provided. The device includes brackets, a gear disk rotatably matched with the annular ground rail through a plurality of rolls arranged in a circumferential direction of the gear disk, a first drive motor, an annular ground rail, and a guide rail in a semicircular shape arranged at top ends of the brackets. An output shaft of a first drive motor is fixedly provided with a first drive gear engaged with the gear disk. The guide rail is slidably provided with three lifting modules which respectively drive a bending module, an electromagnetic head arranged electromagnetic coil electrically connected with a capacitor and a discharge circuit, and a rotational friction and extrusion module including a second drive motor and a friction bar fixedly connected to an output shaft of the second drive motor to rise and fall.

Abstract: The present invention discloses an electromagnetic pulse-aided friction stir lock welding processing device and method, which comprises an upper die body and a lower die body. The upper end of the lower die body is provided with a frustum-shaped settling tank. The lower end of the upper die body is provided with a tip inserted into the settling tank, an outer wall of the tip is fitted with an inner wall of the settling tank, a gap for placing parts to be processed is arranged between the upper die body and the lower die body.

Abstract: Provided is an angle adjustable microscope holder. The angle adjustable microscope holder comprises a base. The base is provided with a rotating piece, the rotating piece is detachably connected with a lifting rod, the lifting rod rotates along with the rotating piece, the lifting rod is provided with a spur rack, the lifting rod is connected with a moving piece in a sleeved manner, the moving piece is provided with a fixing ring, and the fixing ring is configured to fix a microscope. A part of the moving piece is meshed with the spur rack to drive the moving piece to slide relative to the lifting rod. A cross section of the lifting rod is a special-shaped cross section, and the moving piece fits a contact surface of the lifting rod in shape.

Abstract: An electromagnetic pulse additive device for a connection ring of a heavy-lift carrier rocket is provided. The device includes brackets, a gear disk rotatably matched with the annular ground rail through a plurality of rolls arranged in a circumferential direction of the gear disk, a first drive motor, an annular ground rail, and a guide rail in a semicircular shape arranged at top ends of the brackets. An output shaft of a first drive motor is fixedly provided with a first drive gear engaged with the gear disk. The guide rail is slidably provided with three lifting modules which respectively drive a bending module, an electromagnetic head arranged electromagnetic coil electrically connected with a capacitor and a discharge circuit, and a rotational friction and extrusion module including a second drive motor and a friction bar fixedly connected to an output shaft of the second drive motor to rise and fall.

Abstract: The present disclosure discloses a welding gas shielding device, a laser filler wire welding system and a welding method. The welding gas shielding device comprises an upper shielding gas dragging cover device and a back shielding gas device. The laser filler wire welding system comprises a welding gas shielding device, a height adjusting mechanism, a wire feeding system, a laser system, a numerical control console and the like. The welding gas shielding device for narrow gaps made of dissimilar materials is reasonable in structural design, gas shielding can be carried out on the upper area and the lower area of a welding area in the welding process of the narrow gaps made of dissimilar materials, the problem that laser narrow-gap welding gas shielding is insufficient and unstable is solved, the weld joint cooling speed can be adjusted and controlled, the shielding effect is enhanced, and the welding efficiency is improved.

Abstract: The present invention discloses an automatic grinding device for weld beading on the inner wall of a pipeline with a large length to diameter ratio. The automatic grinding device includes a supporting module, and a walking module, a working module and a control module which are arranged on the supporting module, where the walking module is used for moving the supporting module to the butt welding position of the pipeline; the working module is used for grinding the weld beading; and the control module is used for controlling the actions of the walking module and the working module. When the pipeline rotates along the axial direction, the position of the grinding device can remain at the bottom of the pipeline, rather than rotating together with the pipeline, and the elimination of weld beading on the whole circumference at the butt welding position of the pipeline is realized.

Abstract: An additive repair device for internal threads is provided. The device includes a moving assembly, a rotating assembly, a speed regulation assembly, a gear assembly, an additive assembly, and a connecting assembly. The moving assembly includes a drive part and a linear movement mechanism. The additive assembly is connected to the linear movement mechanism through the connecting assembly. One end, which is far away from the drive part, of the linear movement mechanism is connected to an input end of the speed regulation assembly through the gear assembly. The rotating assembly includes a clutch mechanism and a clamping mechanism. The clutch mechanism includes a clutch outer gear and a clutch inner gear. The clutch outer gear is arranged at an output end of the speed regulation assembly. The clamping mechanism is fixed to one end, which is far away from the speed regulation assembly, of the clutch inner gear.

Abstract: The present invention discloses an adaptive and rapid repairing device for single roller, which includes a working module and a mechanical arm module, which are fixedly connected, where the mechanical arm module is connected with a movable module; the working module includes a supporting frame, symmetrical dovetail grooves are opened in two sides of the supporting frame, the dovetail grooves are movably connected with four sliding supports symmetrically arranged along the supporting frame; a connecting rod support penetrates the two through holes opened in the top of the sliding support, the top end of the connecting rod support is hinged with a long connecting rod; the supporting frame is provided with a worm gear mounting support, the worm gear mounting support is equipped with worm gears and worms through rotating shafts, and the worm is fixedly connected with an output shaft of a worm motor.

Abstract: The present invention discloses an adaptive and rapid repairing device for single roller, which includes a working module and a mechanical arm module, which are fixedly connected, where the mechanical arm module is connected with a movable module; the working module includes a supporting frame, symmetrical dovetail grooves are opened in two sides of the supporting frame, the dovetail grooves are movably connected with four sliding supports symmetrically arranged along the supporting frame; a connecting rod support penetrates the two through holes opened in the top of the sliding support, the top end of the connecting rod support is hinged with a long connecting rod; the supporting frame is provided with a worm gear mounting support, the worm gear mounting support is equipped with worm gears and worms through rotating shafts, and the worm is fixedly connected with an output shaft of a worm motor.

Abstract: The present invention discloses an automatic grinding device for weld beading on the inner wall of a pipeline with a large length to diameter ratio. The automatic grinding device includes a supporting module, and a walking module, a working module and a control module which are arranged on the supporting module, where the walking module is used for moving the supporting module to the butt welding position of the pipeline; the working module is used for grinding the weld beading; and the control module is used for controlling the actions of the walking module and the working module. When the pipeline rotates along the axial direction, the position of the grinding device can remain at the bottom of the pipeline, rather than rotating together with the pipeline, and the elimination of weld beading on the whole circumference at the butt welding position of the pipeline is realized.