37 results about "Fiber laser welding" patented technology

The invention relates to the technical field of industries, and discloses a dustless efficient optical fiber laser welding device. The dustless efficient optical fiber laser welding device comprises amachining box. A ceramic table is fixedly arranged on the bottom wall in a cavity of the machining box. Alignment frames are fixedly arranged on the two sides of the machining box, and an optical fiber penetrating the machining box is fixedly arranged on the opposite sides of the two alignment frames. Shaking wheels are fixedly arranged on the front surfaces of the alignment frames. Dust boxes are fixedly arranged on the two sides of the machining box. The tops of the dust boxes communicate with exhaust fans. The bottom of each dust box communicates with a dust suction pipe with one end penetrating and extending into a machining box cavity. The end, away from the corresponding dust box, of each dust suction pipe communicates with an annular pipe, wherein the bottom of the annular pipe communicates with a dust suction pipe head. A hydraulic machine is fixedly arranged on the top of the machining box, and a telescopic rod with one end penetrating and extending into the machining box cavity is fixedly arranged at the bottom of the hydraulic machine. The dustless efficient optical fiber laser welding device is good in dust removing effect and good in using efficiency and is conveniently used by people.

It is a coarse fiber laser welding device and welding method for coarse fiber welding, using a small 100-watt CO2 laser as light source, and using an oral-shaped lens to form the laser beam of the laser to the ring beam, and bowl-shape mirror respecting this ring laser beam to the focus in the center of the bowl-shape mirror, and the welding fiber is placed on the position of focus. There is a hole in the center of the bowl-shape mirror, and the fiber passing through this hole, making the fiber welding part locating in the center of the bowl-shape mirror focus, and after the ring laser focusing, it can uniform irradiate on the welding position around the fiber. Control power and power output time of CO2 laser, to weld different diameter fibers. The invention solves the welding problem of the coarse fiber, making the fiber welding point uniform and smooth.

The invention relates to a welding forming method of a liquid crystal display support, in particular to a method for welding the liquid crystal display support by means of advanced optical fiber laser. The method comprises the following steps that three sections of square tubes forming the support are placed on an automatic clamp and are in butt joint; and an optical fiber laser welding head is adjusted to reach the preset position, welding of a weld joint on the front face of the support is performed at first, the automatic clamp is driven to rotate by 180 degrees after welding is completed, and then welding of a weld joint on the back face of the support is performed. According to the technological parameters, optical fiber laser is continuous wave, the wavelength is 1064 nm, the laser power needed when a vertical weld joint and a flat weld joint are welded is 500-1000 W, the welding speed is 15-25 mm s<-1>, the laser power needed when a fillet weld joint is welded is 500-900 W, and the welding speed is 15-25 mm s<-1>. The method has the beneficial effects that compared with traditional welding methods, the laser welding defective rate of the liquid crystal display support is quite low, the automatic laser welding quantity production of the display support is achieved, the welding quality is ensured, the enterprise production efficiency is improved, and meanwhile the production cost of a single workpiece is lowered.

The invention discloses a method for improving the thermal efficiency of copper optical fiber laser welding based on power modulation, which comprises the following steps: providing an I-shaped groove between two pre-butted coppers, and then performing pretreatment on the surface of the I-shaped groove , and then complete the laser welding of two pre-butted coppers based on laser power modulation, wherein the waveform modulation method is used to realize the laser power modulation, which can effectively improve the thermal efficiency of copper fiber laser welding.

The invention provides a four-axis optical fiber laser welding device and belongs to the technical field of welding equipment. The four-axis optical fiber laser welding device comprises a machine table, a welding mechanism, a locating mechanism, a cooling mechanism, a power supply mechanism and a control mechanism. The locating mechanism comprises an X-axis device horizontally and fixedly connected with the top surface of the machine table, a Z-axis device perpendicularly connected with the top surface of the X-axis device, a Y-axis device perpendicularly connected with the side face of the Z-axis device and a C-axis rotary shaft connected with one end of the Y-axis device. The welding mechanism comprises a laser welding head arranged on the C-axis rotary shaft, a laser generator arrangedinside the machine table and a gas shielding device. A control system comprises an industrial personal computer arranged inside the machine table, a displayer, a keyboard and a mouse, wherein the displayer, the keyboard and the mouse are arranged beside the machine table and matched with the industrial personal computer for use. The four-axis optical fiber laser welding device can realize automatic welding, substantially reduces the manual workload and the requirement for the special technical skills, reduces human errors and the manpower requirement and improves the production efficiency andproduct quality.

The invention discloses a method for improving weld penetration of optical fiber laser welding. In the optical fiber laser welding process, the weld penetration is realized through changing gas composition, namely, the mixed gas of inert gas and active gas is used as protection gas. The mixed gas comprises He-O2 mixed gas, wherein the proportion of O2 is 5%-20%, Ar-O2 mixed gas, wherein the proportion of O2 is 5%-20%, He-CO2 mixed gas, wherein the proportion of CO2 is 10%-50%, and Ar-CO2 mixed gas, wherein the proportion of CO2 is 10%-50%. The method has the advantages of increasing the depth of small laser holes and improving the weld penetration through adjusting the content of active gas in the protection gas.

The invention discloses a pressing welding device and process for a high-power optical fiber laser welding speed changer gear. A laser welding mechanism, a pressing mechanism, a carrying mechanism and a feeding and discharging station are arranged on a work table, a welding station is arranged under the laser welding structure, a pressing station is arranged under the pressing mechanism, the pressing welding device also comprises a gear clamp, the gear clamp comprises an upper layer gear ring clamp plate and a lower layer gear tray, a plurality of gear ring accommodating holes through which gear rings can pass are formed in the upper layer gear ring clamp plate, a gear ring support sheet mechanism for supporting the gear rings is arranged in the gear ring accommodating holes, a plurality of gear struts are arranged in the lower layer gear tray, the positions of the gear struts correspond to the positions of the gear ring accommodating holes, and a plurality of clamp plate positioning posts used for realizing the combination positioning with the upper layer gear ring clamp plate are also arranged on the lower layer gear tray. The pressing welding device and the pressing welding process have the advantages that the one-step pressing of a plurality of groups of gears and gear rings can be realized, the pressing and welding connection is good, and the processing efficiency of the speed changer gear is high.

The invention relates to a method for high-speed optical fiber laser welding for a pure titanium plate with a thickness of 1mm. The method is carried out according to the following steps: (1) a laserbeam is focused onto the surface of the pure titanium plate with the thickness of 1mm through an optical system in a welding head, and the pure titanium plate absorbs laser and then is melted to formwelding joints; (2) the welding head is connected with argon gas provided by a joint-row protection gas pipe and a back surface protection gas chamber to protect the welding joints formed after melting; (3) the welding head is moved to weld the pure titanium plate; and (4) the diameters of the transmission optical fibers of the laser beam output by a laser device are 100[mu]m, the welding head forms an angle of 60-75 degrees with the horizontal direction, the focused spots of the laser beam output by the welding head are located at a +9mm position on the surface of the pure titanium plate withthe thickness of 1mm, the welding head is paraxially connected with the four-joint-row protection gas pipe to protect the welding joint in the front surface, the back surface protection gas chamber protects the welding joint in the back surface, until the whole welding process is concluded, so that welding with a speed of 9m/min, for the pure titanium plate with the thickness of 1mm, is realized,and the welding front surface and back surface are spatter-free after welding. The method disclosed by the invention is capable of effectively avoiding the spatter generated in the welding process; and meanwhile, the protective gas effectively prevents the welding joints from being oxidized, so that the welding quality and the product stability are guaranteed, the rejection rate is lowered, and the welding speed for the pure titanium plate with the thickness of 1mm is increased.

The invention belongs to the technical field of battery manufacturing, and particularly relates to an optical fiber laser welding method for double-layer tabs and a bar sheet. The method comprises the steps that (S1) the copper bar sheet, the copper tab and the aluminum tab are placed in sequence from bottom to top, the copper bar sheet, the copper tab and the aluminum tab are clamped through a clamp, and predetermined welding positions are arranged on the copper bar sheet, the copper tab and the aluminum tab; and (S2) a laser beam is emitted to the welding positions through a welding head of an optical fiber laser, the laser beam is a continuous wave, and the wavelength is 1064nm. The welding is conducted for the first time, the laser power ranges from 1500w to 1800w, and the welding speed ranges from 120mm/s to 150mm/s; and then the welding is conducted for the second time, the laser power ranges from 1000w to 1200w, and the welding speed ranges from 150mm/s to 180mm/s. Protective gas is conveyed to the welding positions in the welding process. According to the method, the reliable welding among the copper bar sheet, the copper tab and the aluminum tab can be realized.

The invention relates to an online detection method for laser deep penetration welding defects. In the welding process, an imaging system is used for extracting and storing shape contour images of small holes and penetrating holes in a molten pool formed in the welding process in real time, and on the basis of a pre-trained relation model between contour features of the images of the small holes and the penetrating holes and the fusion welding defects, on-line detection of the optical fiber laser welding quality is achieved. Establishment of a relation model between the contour features of theimages of the small holes and the penetrating holes and the welding quality is based on detection of a large amount of sample data, and training of feature data of the small holes and the penetratingholes is carried out by using a hidden Markov process. The invention further relates to a detection device applied to the online detection method. According to the online detection method and device,online defect detection and quality analysis in the optical fiber laser welding process are achieved, various defects possibly influencing the welding quality can be found conveniently in the weldingprocess, and the time and cost of later manual detection or X-ray detection are reduced.

The invention discloses laser welding equipment for a power battery anti-explosion valve. The laser welding equipment comprises an optical fiber laser welding head (1), a welding fixture (2) and a welding bench (3), wherein a positioning groove (2b) is formed in a movable block (2a) of the welding fixture (2), and a vacuum nozzle (2c) is arranged in the positioning groove (2b); the optical fiber laser welding head (1) comprises a composite lens focused coupling system and an optical fiber output focusing system, the composite lens focused coupling system is composed of a composite lens group,and the optical fiber output focusing system is composed of a collimating lens group and a focusing lens group. According to the laser welding equipment, an optical fiber transmission system can be optimally designed, so that the power density of high-power pulse solid laser meets the laser welding requirement after optical fiber transmission, flexible light guide of a pulse solid laser welding machine is realized, fine control over laser is realized, welding seams of the power battery anti-explosion valve are uniform, and bad phenomena of false welding, weld penetration, weld misalignment andthe like do not occur.

The invention relates to a laser welding method for dissimilar materials of a titanium alloy and an aluminum alloy, and belongs to the technical field of laser welding and high-entropy alloys. Firstly, a workpiece to be welded is cleaned, then the workpiece to be welded is placed on a clamp, clamping force is applied through the welding clamp, the incident angle of lasers is adjusted to be 40 degrees-45 degrees, base metal is in lap joint, a titanium plate is arranged at the upper portion, and an aluminum plate is arranged at the lower portion; and the assembled workpiece is placed in a fiber laser welding chamber, prepared high-entropy alloy powder is preset at a lap joint, after welding parameters are adjusted, a laser beam is aligned with the center of a welding seam, laser welding is conducted on the workpiece to be welded, the high-entropy alloy powder is firstly melted in the welding process, due to the fact that the laser beam completely irradiates the high-entropy alloy powder, reflection of the base metal to the lasers is avoided, the base metal is melted through heat convection and heat conduction by means of heat transmitted by a molten pool, the melting amount of the base metal is reduced, and natural cooling is achieved. The energy utilization rate is increased, and the laser weldability of the TC4 titanium alloy/6082 aluminum alloy dissimilar materials is greatly improved.

The invention provides a plastic optical fiber laser-welding technique. The plastic optical fiber laser-welding technique is characterized in that a plastic ferrule is welded to an inner jacket of a plastic optical fiber through a semiconductor laser-welding technique. Through laser welding, precise, firm and sealed weld joints can be formed, the resin degradation quantity is small, and few chips are generated; through the non-contact property of laser, no pollution is generated; and the vibrating stress and thermal stress generated by laser welding are smaller than the vibrating stress and thermal stress generated by other connection ways, and the aging speed of the interior of the optical fiber can be effectively decreased.

The invention relates to a laser plate welding method. The method is characterized by comprising the following steps that S1, a first parent material and a second parent material are machined to formbutt-joint end surfaces and groove surfaces, and impurities on the upper surfaces, the lower surfaces, the butt-joint end surfaces and the groove surfaces of the first parent material and the second parent material are removed; S2, the first parent material and the second parent material are accurately connected and clamped in a butt-joint manner; S3, welding rods added with rare earth elements are provided; S4, a manual consumable-electrode metal-inert gas welding (MIG) method is adopted, and butt-joint grooves of the first parent material and the second parent material are welded; and S5, high-power optical fiber laser beams formed by laser welding head focusing irradiate on the surfaces of MIG welding seams, and then penetration welding of the first parent material and the second parentmaterial is achieved. According to the method, a welding seam layer which is rich in rare earth elements is loaded in the upper portion of small-hole welding plates, and the surface tension of the front wall of each small hole is effectively improved in the laser welding process, so that a smooth small hole wall form is obtained, the stability of the optical fiber laser welding process is improved, and the defects of splashing, root leakage and the like are avoided.

The invention relates to a component assembly, comprising a first component (10), a second component (20), and an optical fiber laser welding connection (2) disposed between the first component (10) and the second component (20), which can connect the first component to the second component at a bonding gap (6). The optical fiber laser welding connection (2) at least includes a first welding seam (3) and a second welding seam (4), which are arranged in parallel in a manner of mutually contacting. The invention also relates to a method for manufacturing the optical fiber laser welding connection.

The invention discloses an optical fiber laser welding machine online monitoring system, application and an optical fiber laser welding machine. The system comprises an optical splitter, a detection light path and a photoelectric detector, the optical splitter is connected with a laser transmission optical fiber of the optical fiber laser welding machine or is arranged in a welding head light path, and is used for sampling output laser and inputting detection light obtained by sampling into a detection light path; the detection light path at least comprises a filter for selecting a detection wave band; the filter is used for selecting an optical signal of a Raman optical band; and the photoelectric detector is connected with the output of the detection light path and is used for detecting the optical power of the detection wave band output by the detection light path. The system is applied to online monitoring of the high-power continuous laser welding machine, optical power signals of Raman optical bands are monitored in real time, full-band output spectrum analysis is replaced, and laser output quality can be accurately judged while real-time response and online monitoring are achieved, so that the working state of the laser welding machine is judged.

The invention relates to a production process of a novel network transformer, which comprises a part assembly process, an ultraviolet laser peeling and depainting process and an optical fiber laser welding process, wherein the part assembly process comprises a process of connecting a wire in a coil with a pin on a transformer shell, the ultraviolet laser peeling and depainting process comprises a process of feeding a part subjected to the assembly process into an ultraviolet laser peeling machine to peel and depaint a wire, and the optical fiber laser welding process comprises a process of closing up, clamping and fixing the peeled and depainted wire, then welding and taking out a product after welding is completed. According to the production process of the novel network transformer, the full automation rate and the yield of production are improved, and the problems that the production stability of the network transformer is poor, the production efficiency is low, the rejection rate is high, and the product quality is easily affected are solved.