16results about How to "Small heat affected zone" patented technology

A kind of metal pipe fitting electromagnetic forming device and method based on laser heating, with positioning system including positioner, first guide rail, first numerical control moving platform, for accurately positioning metal pipe fitting and mold coordinates;Conveying system includes second guide rail, numerical control moving platform, motor, for realizing the rotation and movement of metal pipe fitting;Heating system includes laser heating device, temperature detector;Electromagnetic forming system includes spiral tube coil, mold, capacitor, DC power supply and control switch;Its characterized in that, motor, fixture, metal pipe fitting, mold, spiral tube coil are horizontally distributed on the same axis, metal pipe fitting can be rotated with the help of motor, and can be moved in the gap between spiral tube coil and mold with the aid of conveying system.The present application can realize uniform heating when metal pipe fitting electromagnetic warm forming, greatly improve heating efficiency, reduce heat affected zone, and improve the position accuracy of metal pipe fitting local microstructure electromagnetic forming.

The invention relates to a manufacturing method of a split flexible gear, which is applied to the field of welding and comprises the following steps: respectively manufacturing a cup body and a flange plate; putting the cup body and the flange plate into cleaning equipment, and performing surface treatment on the cup body and the flange plate; the cup body is assembled on the flange plate to form a workpiece; a brazing filler metal and a stop-off agent are placed on the lap joint face between the cup body and the flange plate; the whole workpiece is put into a vacuum brazing furnace, and a vacuum system is started to vacuumize the interior of the vacuum brazing furnace; and the temperature in the vacuum brazing furnace is increased to the target brazing temperature. The mode of integrally machining the flexible gear through a complex deep-cavity thin-wall part in the prior art is optimized and decomposed into two relatively simple parts to be welded and machined, the production process is optimized and shortened while raw materials are saved, a heat affected zone can be greatly reduced through vacuum brazing, and the production quality and the production efficiency of the flexible gear are improved.

This invention relates to an electron beam welding method for ZL114A / ZL270 dissimilar aluminum alloy materials, belonging to the field of electron beam welding technology. It addresses one of the problems encountered in existing electron beam welding methods for ZL114A / ZL270, namely, the presence of obvious cracks, incomplete fusion, and excessive internal porosity within the weld seam. The electron beam welding method of this invention includes: tack welding of assembled ZL114A and ZL270 alloy test plates; welding using a dual electron beam synchronous welding method with one electron beam preheating the weld seam first, followed by the other electron beam for the final welding; during the final welding process, the center of the electron beam spot is shifted from the butt joint of the test plates towards the ZL270 alloy plate side.

The utility model relates to a kind of differential and vehicle, its shell is fixedly connected by welding with main reduction gear, shell is constituted by two half shells and is respectively installed in the axial both sides end surface of main reduction gear. Fixed part for and half shell welding is equipped on the axial both sides end surface of main reduction gear, and positioning part spaced apart from fixed part welding area in radial direction is also equipped, and positioning part supports half shell when welding. The technical scheme will positioning part and welding area be spaced apart, avoid the influence of positioning accuracy by heat distortion generated in welding process, can effectively improve the assembly accuracy and overall performance of differential, ensure the reliable operation of differential.

The application discloses an aluminum alloy box unequal-thickness butt joint friction stir welding method, which comprises the following steps: process placing of an upper panel of an aluminum alloy box, increasing a friction stir welding arc receiving plate area; cleaning the left panel, the right panel and the upper panel of the aluminum alloy box, adopting mechanical polishing and cleaning; positioning and assembling the left panel, the right panel and the upper panel on a tool, controlling the assembly gap and the misalignment to be not greater than 0.5 mm; setting the parameters of the friction stir welding, and welding the weld joints between the left panel and the upper panel and between the right panel and the upper panel. The aluminum alloy box unequal-thickness butt joint friction stir welding method utilizes the advantages of the friction stir welding to improve the welding deformation, improves the welding quality and improves the production efficiency.

The invention belongs to the technical field of pressure measurement. The dynamic pressure sensor resistant to the temperature of 850 DEG C and excellent in temperature stability comprises a closed inner cavity defined by an upper shell, a middle shell, a lower shell and a diaphragm, and a piezoelectric sensitive assembly arranged on the inner side of the diaphragm. The piezoelectric sensitive assembly comprises an upper crystal group and a lower crystal group which are composed of high-temperature piezoelectric crystals, a mass block in the middle and thermal expansion matching ceramic chips at the two ends, and is axially pre-tightened through a bolt and nut assembly. The upper and lower crystal groups are output in parallel with opposite polarities to realize active acceleration compensation; the thermal expansion matching ceramic chip is made of YBP series ceramic, so that high-temperature thermal stress is effectively relieved; all metal pieces are made of 316L stainless steel and are sealed through laser welding, internal signals penetrate through the aluminum oxide ceramic tube through the electrode plates and the nickel wires to be led to the signal output contact pin, the sensor is provided with an active acceleration compensation and thermal expansion matching structure, and high-stability and high-sensitivity dynamic pressure measurement under the high-temperature severe environment is achieved.

The invention discloses an optical fiber beam combiner structure based on a single-mode optical fiber and a metasurface and a preparation method of the optical fiber beam combiner structure, belongs to the field of optical fiber beam combiners, and maximizes the output optical power of the beam combiner structure through structural cooperation among the single-mode optical fiber, a coreless optical fiber and a micropore area of the single-mode optical fiber with the punched side face. The beam combiner mainly comprises a beam combiner structure, the beam combiner structure comprises a single-mode optical fiber and a single-mode optical fiber with a punched side face, the end portion of the single-mode optical fiber is a coreless optical fiber, the coreless optical fiber is subjected to beveling processing, the single-mode optical fiber with the punched side face is provided with a micropore, the micropore is provided with a metasurface made of a silicon substrate, and the metasurface is made of a silicon substrate. And the diagonal plane at the coreless optical fiber faces the micropore area of the side-punched single-mode optical fiber, so that the output optical power among the micropore areas of the single-mode optical fiber, the coreless optical fiber and the side-punched single-mode optical fiber is maximum, and the single-mode optical fiber and the side-punched single-mode optical fiber are cured. The invention is mainly used for the optical fiber beam combiner.

The application provides a tunable pulse train laser and a design method thereof, the laser comprising a pumping light fiber coupling focusing system, a cavity mirror, a laser crystal, a passive Q-switching crystal, an active Q-switching system and a laser output mirror arranged in sequence according to an optical path; the tunable pulse train laser is configured to: in a working state, through the equivalent length control of the passive Q-switching crystal and the modulation control of the active Q-switching system, the number of pulse trains is controlled under the same main frequency, or the same pulse train is output under different main frequencies. The application uses the active Q-switching system and the passive Q-switching crystal in cooperation, uses the active Q-switching and the passive Q-switching in combination to obtain the output of the main frequency plus the pulse train, is favorable for the multiple processing at the same point in the fine machining, and the single pulse energy is constant, thereby providing a pulse train laser scheme which is lower in cost, more ingenious and simple in structure, good in regulation flexibility, and higher in stability and reliability of the laser.

The application discloses a processing method of an elongated spring rod, and specific steps are as follows: ① blanking: preparing blanks and blanking according to the size of each part in the elongated spring rod; ② semi-finishing: semi-finishing the blank of each part to meet the assembly requirement; ③ assembly welding: assembling each part according to the drawing requirement and adopting laser deep penetration welding to perform assembly welding; ④ finishing: finishing the spring rod assembly; ⑤ quenching: performing laser surface quenching on the middle part of the spring rod assembly; and ⑥ final inspection: performing inspection on the spring rod assembly according to the drawing requirement. The application makes the deformation of the elongated spring rod small, shortens the processing period and reduces the production cost. Meanwhile, the application prolongs the service life, improves the processing efficiency and greatly improves the qualified rate of finished products.

The invention discloses an activation and surface protection method for ion implantation SiC, and relates to the technical field of semiconductor manufacturing. Comprising the following steps: performing high-temperature ion implantation on a SiC wafer; pVD carbon film plating is carried out on the SiC wafer after high-temperature ion implantation; performing laser activation annealing on the SiC wafer plated with the carbon film; performing plasma physical etching on the annealed SiC wafer; carrying out sacrificial oxide layer treatment on the SiC wafer subjected to plasma physical etching; and carrying out BOE solution wet etching on the SiC wafer after sacrificial oxide layer treatment to obtain the SiC device. According to the method, through high-temperature ion implantation and laser annealing treatment and by adopting a multi-step carbon film removal process, the ion implantation impurity activation efficiency is remarkably improved, meanwhile, the morphology of the device is guaranteed, and the performance of the device is improved. The method has the advantages of simple process, high activation efficiency, good repeatability and the like, and is suitable for manufacturing SiC-based power semiconductor devices.

The utility model discloses an optical fiber splice closure, which comprises a bottom shell and a surface cover, the surface cover comprises at least one cable inlet and a plurality of wiring holes, the wiring holes are provided with optical fiber connector joints, the surface cover is fixedly arranged on the bottom shell, a metal coil is arranged at the connecting part of the surface cover and the bottom shell, and the bottom shell is provided with a groove. The groove surrounds the side edge of the bottom shell, and the metal coil is arranged in the groove; the metal coil induction heating engineering plastic is added for high-frequency induction welding, the heating speed is extremely high, by adjusting the frequency and the design of the induction coil, the heating area can be accurately controlled, the heat affected zone is reduced, the metal coil increases the welding strength, the welding sealing is better, and the mechanical properties such as the structural strength and the welding rigidity are remarkably improved.

The utility model discloses a detachable locking structure of laser pipe cutting machine relates to laser pipe cutting machine technical field. The utility model discloses a dismounting board, the dismounting board top is provided with first air cylinder, and the first air cylinder output is fixedly connected with the locking plate through first bolt, the dismounting board top is provided with the adjusting assembly, and the adjusting assembly includes the second air cylinder of setting in the dismounting board top, the support of fixed connection in the second air cylinder output through second bolt, and the motor swing joint in one side of the support. The utility model discloses a adjusting assembly realized the horizontal position fine adjustment and rotation positioning of pipe material, solved the problem that traditional locking structure can only radial clamping. Motor drive carousel rotates, and the cooperation of movable block and annular movable slot ensures that pipe material can dynamically adjust angle in the cutting process, optimizes cutting path, reduces the heat influence area, improves cutting accuracy and application scope.

The application provides a manufacturing method of a perovskite battery assembly and the perovskite battery assembly manufactured by the method. The manufacturing method comprises the following steps: setting a lower protective layer on a first charge transport layer and then performing P2 laser etching, and the P2 laser etching is controlled as follows: first, a first laser with high frequency and low power is used to perform first etching; then, a second laser with low frequency and high power is used to perform second etching; and after the lower protective layer and a top electrode are set, a third laser with high frequency and low power is used to perform P3 laser etching. By using the manufacturing method, the heat influence on both sides of the P2 line groove can be effectively reduced, the crater defects can be reduced, the flatness and cleanliness of the P2 line groove can be effectively improved, and the charge transport capacity of the internal interface of the assembly can be enhanced. The P3 line groove formed by the method only etches the top electrode and the two protective layers, does not damage other film layers, avoids the reaction between the perovskite layer and water and oxygen, improves the stability of the assembly, and finally improves the power generation efficiency of the assembly.

This invention discloses a stacking inductor for induction brazing, comprising a hollow copper tube, a fiberglass sleeve, a PTFE insulating sheet, and an inductor base. The hollow copper tube is the core component, fixed end-to-end to the base and wound in the middle to form a ring-shaped heating port with three inner and two outer sections, used to transmit high-frequency current and create a uniform magnetic field. The fiberglass sleeve and PTFE insulating sheet provide electrical insulation and high-temperature resistance. The symmetrical structure of the base ensures stability. This invention achieves rapid workpiece heating through electromagnetic induction, offering advantages such as fast heating, high precision, energy saving, environmental friendliness, and safety and reliability. It is suitable for precision welding processes in the refrigeration industry and related manufacturing fields.

The present application relates to the field of material processing engineering, and particularly relates to a high-energy precise pulse cold welding method for magnesium-steel sheet welding, the principle of which is to use a high-power capacitor as a welding power source, to release a pulse arc with high energy density and concentration between a tungsten electrode and a welding piece in an instant during welding, and to realize the connection of the workpiece. In view of the poor interface metallurgical compatibility existing in the welding of magnesium-steel dissimilar metals, the high-energy precise pulse cold welding method is adopted to precisely control the pulse current, pulse time and pulse interval in the order of ms, to optimize the energy distribution of the joint, to accurately control the interface temperature of the magnesium-steel dissimilar metals, to regulate the characteristics of the intermetallic compounds of the interface, and to obtain a high-quality magnesium-steel fusion-brazing joint. Moreover, the welding device used in the welding method is simple in equipment, convenient in operation, low in welding cost and high in efficiency.

The invention discloses laser cleaning and repairing integrated equipment and process for an OLED micro display, the equipment comprises a femtosecond laser, a mobile platform, a light path module, an image detection system and a control system, the light path module spreads laser emitted by the femtosecond laser to a bonding pad on the mobile platform, and meanwhile, the adjustment of the wavelength of a light beam and the size of a light spot can be realized; and the image detection system is used for acquiring an image and visual positioning of the bonding pad in the processing process. The equipment integrates laser material processing, the light path module and the high-precision moving platform, two laser processing functions of cleaning and repairing can be realized on the same equipment by adjusting laser through the light path module, and meanwhile, the accuracy of repairing and positioning can be effectively improved through mutual cooperation of the image detection system and the moving platform, so that the working efficiency is improved. And the machining precision and the production efficiency are improved.