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: 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: A heating device for in-service welding of oil and gas pipeline, which comprises a heating section, a heat dissipation section and a constant temperature section, wherein the heating section and the heat dissipation section are mounted on an oil and gas pipeline. The heating section heats the oil and gas pipeline to simultaneously heat the wall of the oil and gas pipeline and fluid in the oil and gas pipeline. A work station to be welded is heated by utilizing flowing of the fluid and heat conduction of the wall of the oil and gas pipeline. The heat dissipation section is mounted on the oil and gas pipeline.