1549 results about "Laser soldering" patented technology

A laser welding apparatus includes: a first optical element that coaxially emits, to a welded part, a laser beam emitted from a laser light source and an object beam having a different wavelength from the laser beam; a second optical element that causes the spot diameter of the object beam to be larger than the spot diameter of the laser beam on the welded part; an optical interferometer that emits the object beam to the first optical element, detects through the first optical element the object beam reflected on the welded part, and generates an electric signal based on the detected object beam; and a measuring unit that measures a penetration depth of the welded part based on the electric signal.

The invention discloses a laser soldering method, comprising the following steps: (1) a semiconductor laser radiates a PCB pad with set energy so that the surface of the PCB pad reaches certain preheating temperature; (2) solder wires are fed to the surface of the PCB pad by a wire feeding mechanism on condition of certain feeding parameters; (3) under the action of laser radiation, the solder wires are molten and the molten tin spreads and moistens over the surface of the PCB pad; (4) the solder wires are withdrawn and removed from the pad; (5) the semiconductor laser continues radiating the pad so that the solder wires spread over the surface of the pad fully; and (6) the laser is closed and the tin is naturally cooled to form soldering points. During the use of the method, laser is used as soldering heat source, solder wires which are used as brazing filler metal are conveyed by wire feeder, and soldering connection is realized through the action of radiation of the laser to the tin wires and the PCB pad. Due to the characteristics of local heating, rapid heating, rapid cooling and the like during soldering, the method can effectively reduce heat loss of elements and greatly enhance the qualified rate of soldering.

The invention discloses a combination device capable of achieving underwater laser welding and laser shot blasting. A laser welding-shot blasting component, an ultrasound detecting device, a water-argon inlet and a welding strip filling device are mounted on the same sealing cover which is placed underwater. Two functions of laser welding and laser shot blasting are achieved, and laser ultrasound detecting can be directly carried out on a workpiece after processing. By setting different laser wavelengths and sealing cover cavity inner environments, different functions can be used. During laser welding, a sealing cover cavity is filled with argon through the water-argon inlet. During laser shot blasting, the sealing cover cavity is filled with water through the water-argon inlet. The combination device is ingenious in structure, easy to operate, strong in adaptability, high in machining efficiency, capable of being used for alternating or continuous working of underwater welding and laser shot blasting and especially suitable for working under a special environment and defect repairing under the situation that the face where a defect exists is small in area.

The invention relates to a device for vacuum laser welding and belongs to the technical field of vacuum laser welding. The device comprises a laser welding device (1), a vacuum chamber assembly (2), a vacuumizing assembly (3) and a supporting and clamping assembly (4), wherein the supporting and clamping assembly (4) comprises a chuck body (41), a clamping claw (42) and a fixing support (43). The supporting and clamping assembly adopts the claw on the chuck to clamp a member to be welded, simultaneously a vacuum cavity body is fixed on the chuck body through the fixing support so as to ensure that the member to be welded rotate synchronously with the vacuum cavity under the rotary welding mode of the member to be welded, relative motion of the member to be welded and the vacuum cavity body is eliminated, good sealing effect is ensured, the structure is convenient and fast to assemble and clamp, space utilization rate of the vacuum cavity body is high, and the vacuumizing process consumes short time.

A laser welding structure includes a lead, a conductive member, and a welding part. The lead has a nickel plating layer and is made of copper or copper alloy. The conductive member is joined with the lead and is made of copper or copper alloy. The welding part is formed by a laser welding so as to join the lead and the conductive member. An end portion of the welding part has a rounded convex shape.

Niobium or its alloy based Superconducting Radio Frequency (SCRF) Cavities involving atleast one laser beam welded components in the SCRF cavity welded from inside surface of the wall of cavity directed to achieving more than half the thickness to full depth penetration with minimum HAZ, minimizing distortion and shrinkage. The method ensures improved weld quality and surface finish substantially free of any weld defects. Also disclosed is the welding nozzle system and welding rigs adapted to facilitate such laser welding of the Niobium or its alloy based Superconducting Radio Frequency (SCRF) Cavities. The invention is thus directed to enhancing productivity, ensuring consistent quality and reliability, enhanced weld penetration with minimum HAZ, smooth finish of weld joints at possible reduced costs.

A metal member and a resin member, or two resin members are welded or bonded to each other at welding or bonding surfaces thereof which are heated by irradiation of a laser beam, thereby providing an assembly wherein the two members are fluid-tightly bonded at the bonding surfaces. The laser beam is transmitted through a laser transmitting resin, and a laser absorbing material which is in contact with the laser transmitting resin is irradiated with the laser beam, so that the laser absorbing material is heated, whereby the laser transmitting resin and the laser absorbing resin are melted owing to the heat. By moving the spot of the laser beam, portions of the resin members to be heated and melted displace, and the resin materials are melted and then solidify. The casing 202 includes an upper part 216 formed of the laser absorbing resin and a lower part 218 formed of the laser transmitting resin. The casing 202 is fixed to a housing 200 formed of the laser absorbing resin, and a contact portion 268 of the upper surface of the housing 200 is irradiated with a laser beam emitted from the laser beam emitting device located outside the casing 202 such that the laser beam is emitted from the upper side of the housing 200 and is obliquely incident on the contact portion 268. The contact portion 268 is irradiated with the laser beam as described above with the location to be irradiated by the laser beam being moved at a constant speed along and throughout the periphery of the casing 202 along walls 206 thereof, whereby the casing 202 and the housing 200 are welded or bonded to each other. The lid 204 formed of the laser transmitting resin is fixed onto the casing 202, and the lid 204 and the casing 202 are welded or bonded to each other by the laser beam emitted from the emitting device located above a contact portion 272 of an upper surface of the casing 202.

To provide a material for laser welding, which is excellent in laser transmittance, as well as low warpage and enables a shaped article to be obtained with high weld strength and uniform weld strength by laser welding. This material for laser welding comprises a thermoplastic resin composition containing (A) a thermoplastic resin and (B) a glass fiber having a non-circular cross-section with the ratio between the long diameter and the short diameter in the cross-section at right angles to the length direction being from 1.2 to 10.

The invention provides a laser scanning and laser hot wire TIG composite welding method which is formed by combining scanning laser welding and laser hot wire TIG composite welding. During welding, before a welding wire is fed into a molten pool, the welding wire is heated by low power laser, TIG electric arcs and scanning laser simultaneously act on the molten pool, and the welding wire fed into the molten pool is heated simply by very little heat. On one hand, through the preheating action of the low power laser, the melting efficiency of the welding wire is improved. On the other hand, due to the stirring action of the scanning laser on the molten pool, the temperature gradient is reduced, the solidification and crystallization process is improved, and the property of a welded joint is improved. A scanning trace can be in any forms like a circle, a sine shape and a triangle, and scanning can be carried out in a specific area and range. In addition, due to mutual intensified coupling action of laser electric arcs, the depth of fusion is increased. With the adoption of the laser scanning and laser hot wire TIG composite welding method, high quality of TIG welding is ensured, the efficiency and the welding quality are improved and the welding defects are overcome.

The invention discloses a laser seal welding technology of a composite aluminum alloy shell. The laser seal welding technology comprises the following steps of 1, visual alignment; 2, laser spot welding locating, wherein laser spot welding of a plurality of equal-distance spots is carried out on all the edges of a seam of the aluminum alloy shell and an aluminum alloy cover plate, so that the aluminum alloy shell and the aluminum alloy cover plate are fixed; and 3, laser seal welding, wherein laser seal welding is carried out on the seam of the aluminum alloy shell and the aluminum alloy cover plate, and according to the technological parameters of laser seal welding, the laser pulse peak power is 1,700 W-2,200 W, the pulse waveform is rectangular waves, the pulse width is 2 ms-4 ms, the pulse repetition frequency is 10 Hz-30 Hz, the welding speed is 108 mm/min-270 mm/min, and the defocusing amount ranges from -2 mm to 0 mm. Cracks and air holes at the laser welding seam of the composite aluminum alloy shell can be effectively eliminated, and the packaged composite aluminum alloy shell has the advantages of being attractive in welding seam appearance, high in airtightness, reliability and efficiency, low in cost and the like.

A laser welder controls a focus and direction of a laser beam received from a laser oscillator through optical fiber and radiating the controlled laser beam. The laser welder may include a housing; a beam transmission unit expanding a beam size and simultaneously switching direction of the laser beam; a first radiation unit switching direction of the laser beam by reflecting part of the laser beam through a slot mirror and simultaneously reducing the beam size within the housing, thus forming a focus in a first welding unit through a first beam port; and a second radiation unit expanding and reducing a remainder of the laser beam received through the slot mirror of the first radiation unit and simultaneously switching a direction of the remainder, thus forming a focus in a second welding unit through a second beam port.

By irradiating laser light 20 obliquely onto a substrate 6, the laser soldering apparatus reduces the laser light passing through an insertion hole 61a in the substrate 6 and prevents damage to low-heat-resistance portions of a component 62 disposed on the rear surface side of the substrate 6. Moreover, the substrate 6 can be observed from a normal direction with a camera 23. Therefore, even if the insertion hole 61 for inserting a component lead or the like is provided in the substrate 6, the laser light does not leak out to the side of a component mounting surface 17 of the substrate 6.

The invention discloses a laser tin soldering device based on an FPC (flexible printed circuit) golden finger. The laser tin soldering device comprises a first wavelength laser device, a second wavelength laser device and a controller, wherein the second wavelength laser device is different from the first wavelength laser device; the controller is used for controlling the first wavelength laser device and the second wavelength laser device to sequentially emit light; the first wavelength laser device is used for radiating a soldering area and preheating to reach the setting temperature, and then the second wavelength laser device is used for soldering and heating; in the soldering process, the first wavelength laser device is used for preheating a soldering area of the FPC golden finger to reach the preset temperature, the second wavelength laser device is used for soldering and heating the preheating area, and soldering tin is melted to connect a PCB (printed circuit board) and the golden finger. The laser soldering device has the advantages that the golden finger area is preheated by two types of laser with different wavelengths according to material properties, and the reflection of laser is reduced; when the setting temperature is reached, the second wavelength laser device is used for soldering and heating, and the soldering tin is melted to solder; the problem of part of material is destroyed while part of material just reaches the soldering temperature due to different temperature rise property in the soldering part of the PCB is avoided, and the soldering efficiency and soldering quality are improved.

The invention discloses a LabView-based real-time monitoring system for a laser cladding/laser re-melting process temperature field, which comprises a software control part and a temperature measuring device, wherein the software control part is composed of a LabView program and a single chip program; the temperature measuring device is composed of an infrared temperature measuring sensor, a single chip, a single chip power supply module, a sensor power supply module, a 22.1184MHz crystal oscillator, a resetting circuit and a laser processing machine tool; the system can be used for realizing the functions of real-time collecting and dynamic monitoring for the temperature data in the laser processing processes of laser re-melting, laser cladding and laser welding, high-temperature alarming, temperature data storage and output, setting for different temperature curve display modes, temperature curve picture output, setting for different temperature precisions, dynamic display of temperature curves, data playback, check and editing, and the like; and the sensors with different temperature measuring scopes are selected according to the temperature measuring demand, so that the temperature measurement within the scope of 0-2500 DEG C is realized.

A fixture for laser welding is composed of base plate, cover plate, fastening nut, locating hole and lamping unit. The said clamping unit installed on base plate consists of eccentric pull rod, spring, pressing head and base. Its pressing head is such improved that it has a central recess and two wedge-shaped side parts. Its advantages include convenient operation and high working efficiency.

The invention relates to a method for manufacturing and sealing an exhaust port in vacuum glass, which comprises the following steps: directly carrying out layer-by-layer three-dimensional carving in plate glass by using laser so as to form the exhaust port, carrying out three-dimensional carving on a glass block by using laser so as to form a glass sealing plug, laying sealant between the plug body and the exhaust port, then welding and sealing the plug body and the exhaust port by using laser. The invention also provides a system for manufacturing and sealing the exhaust port in the vacuum glass, which comprises a laser carving device, a laser welding device, a vacuum chuck and a glass sealing plug installing device, wherein the laser carving device comprises a laser device, a laser power controller, a first galvanometer system and a computer; the laser welding device comprises a laser system and a second galvanometer system; the vacuum chuck is connected with a vacuum pump through a connecting tube; a magnet coil is arranged on the top of the vacuum chuck; and the glass sealing plug installing device is composed of a magnet driving device. The sealing exhaust port in vacuum glass of the invention has the advantages of high sealing accuracy and no surface embossment so as to improve vacuum sealing performance and safety performance, and is easy for on-line implementation so as to improve work efficiency.

The invention provides an Al-Fe alloy plate for a shell of a power battery and a preparation method thereof. The Al-Fe alloy plate comprises the following components in percentage by mass: 0.9-1.6 percent of Fe, 0.08-0.2 percent of Si and the balance of Al and inevitable impurities, wherein the area ratio of a Fe-containing inter-metallic compound with the internal alloy length of more than 1 mu m is over 5 percent in the plate thickness direction. The preparation method comprises the following steps of: casting a cast ingot, raising the temperature of the cast alloy cast ingot to 560-600 DEG C, keeping the temperature for more than one hour, reducing the temperature to 450-520 DEG C, keeping the temperature for more than two hours, and performing hot rolling; and performing cold rolling on the hot-rolled plate to the required thickness, annealing the obtained cold-rolled plate at the temperature of 350-420 DEG C for more than one hour, and performing air cooling after the plate is annealed, wherein the speed is not more than 100 DEG C per hour during temperature rise or reduction. The alloy plate has excellent mechanical property, pulse laser welding performance and forming property, and the requirements of manufacturing the shell of the power battery are met.

The embodiments described herein provide improved scanner assemblies that include a first plastic body, a second plastic body, a movable scanning platform and a drive device. The first plastic body includes a first plurality of coupling structures, while the second plastic body includes a second plurality of coupling structures. The moveable scanning platform is positioned between the first plastic body and the second plastic body, and each of the first plurality of coupling structures is welded to a corresponding one of the second plurality of coupling structures.

The invention relates to a laser welding method of a stainless steel sheet fillet weld and a clamp of the laser welding method. The laser welding method comprises the steps that four protective gas nozzles which are coaxial are used, argon serves as protective gas, demonstration location is conducted through a CCD sensor, visual locating by an operator is replaced, the included angle between a YW-52 welding head and the Z axis ranges from 25 degrees to 30 degrees, a horizontal sheet is in lap joint with the position at the two thirds of the thickness of a vertical sheet, the off-focus value ranges from +15mm to +25mm, the welding speed ranges from 2m/min to 6m/min, and laser welding is conducted. According to the laser welding method of the stainless steel sheet fillet weld, the precision and the speed of production are improved, sheet fillet weld fillet transition is achieved, the front surface and the back surface are not provided with oxidation tints, the welding quality can meet mass production, and the technical requirements of product design are achieved. In order to improve the efficiency and the quality of the welding method, when welding is conducted, the special clamp is applied. According to the welding clamp, one clamp body is in the horizontal position, the other clamp body is perpendicular to the clamp body in the horizontal position, and two 0.7mm sheets are fixed through the welding clamp. Through a rapid fixture, a gasket, pressing plates, a platform and screws, stainless steel can be rapidly located and firmly fixed, and the stainless steel can be prevented from being abraded in the process of fixing.

The invention discloses a novel welding method for the laser welding of a magnesium alloy. The method comprises the following steps of: adding an organic solvent into SiO2 active agent powder to form paste; coating the pasty SiO2 active agent on the surface of a part to be welded of the magnesium alloy uniformly to form a SiO2 active agent coating; and performing laser welding after the organic solvent in the SiO2 active agent coating is violated. By the method, due to high absorption capacity and low reflectivity of the SiO2 active agent coating for a laser beam, the loss rate of laser energy is reduced, the transmission efficiency of the energy is increased, and the energy utilization rate of the laser beam is remarkably improved; the energy utilization rate of the laser beam is remarkably improved, so that the fusion depth of a welding seam is remarkably increased, and the mechanical property of a welding joint can be obviously improved; and simultaneously, a low-power laser welding process can be utilized, so that the welding cost is reduced.

Laser soldering equipment comprises a rack, an X-axis moving platform, a Z-axis lifting platform and Y-axis feeding and transferring platforms. The Y-axis feeding and transferring platforms are arranged on the machining plane of the rack and used for transferring welding products in the Y axis direction. The Z-axis lifting platform is arranged on the X-axis moving platform. The X-axis moving platform is transversely arranged on the side faces of the Y-axis feeding and transferring platforms to drive the Z-axis lifting platform to move in the X-axis direction. A laser welding head is mounted onthe side face of the Z-axis lifting platform. A laser emission head of the laser welding head conducts laser welding, infrared temperature measurement and visual positioning on the welding point positions by the adoption of coaxial light beans. The laser emission head is sleeved with an outlet wire alignment mechanism. A wire outlet of the outlet wire alignment mechanism is aligned with the focuspoint of the coaxial light beams. The wire outlet is capable of rotating with the focus point as the center. An automatic wire conveying mechanism for conveying tin wires to the wire outlet is arranged on the side face of the laser welding head. The laser soldering equipment has the beneficial effects that the temperature control is precise, the welding positioning accuracy is high, the welding efficiency is high, and the operation is stable and reliable.

The invention is applicable to the technical field of laser welding, and provides laser welding equipment. The laser welding equipment comprises a bottom plate and a laser welding head, wherein a rotary shaft is connected onto the bottom face of a rotary plate; two vertical plates are fixed onto the bottom plate; a third guide rod is connected between the two vertical plates; a moving base is slidably arranged on the third guide rod; a second guide rod is fixed onto the moving base; a lifting base is slidably arranged on the second guide rod; a connecting rod assembly is arranged on the movingbase; a channel is arranged on the lifting base; a cross rod penetrates through the channel; an adjusting assembly is arranged on the cross rod; and a moving assembly is further arranged on the lifting base. According to the laser welding equipment, through the hinge-joint cooperation of a center shaft and a limiting plate, the laser welding head can rotate together with a rotary rod, and a screwrod moves in an arc-shaped through hole, so that the angle of the laser welding head can be adjusted to meet different angle requirements, and the application range is enlarged; and through screwingdown a nut on the screw rod, the angle of the laser welding head can be locked, so that the welding can be carried out conveniently.

Process and apparatus for joining at least two elements, in particular an electronic component such as an LED with a substrate, such as a PCB. An imaging means divides a light beam into a plurality of partial light beams and images these partial light beams, forming a plurality of discrete light spots, which form a plurality of discrete material joining portions. The light beam is divided using a diffractive optical element (DOE) also enabling a beam shaping and beam processing. A plurality of material joining portions can be formed simultaneously enabling a high process rate. The method is suited for laser soldering of components, which are not exposed to high thermal loads, e.g. for forming electrical contacting portions of LEDs. These discrete light spots can also be used for material processing, in particular for simultaneously forming a plurality of preweakened material zones or perforations in a substrate.

The invention relates to a non-contact laser welding technique which comprises the following steps: a. placing tin balls in a container filled with nitrogen; b. melting the tin balls with a laser; and c. blowing the molten tin balls to the position to be welded on the workpiece under the pressure of nitrogen. The application of non-contact laser system: common welding techniques, which mainly carry out welding in an electric soldering iron heating mode, are contact welding techniques; and by adopting laser welding, the invention ensures the welding quality, solves and realizes the non-contact welding technique. The invention uses colophony-free welding technique to prevent colophony from polluting an object, thereby enhancing the welding quality; the invention can use an auxiliary image vision system to locate the solder position, and the positioning accuracy can be below 0.015 millimeter, thereby having the advantages of quick positioning and high accuracy; and nitrogen drives tin balls to be ejected out of the tin ball container with high speed and stability, and thus, the invention can also prevent oxidation in the process of high temperature melting and solidification.

A laser soldering device of a simple structure, which can, even in soldering between an annular terminal and a bar-like terminal inserted inside the annular terminal, efficiently solder them together by emitting a special-shaped laser beam capable of heating both the terminals without causing burning of electronic components. In the laser soldering device for performing soldering by applying a laser beam to objects to be soldered, some of optical lenses are cone lenses. The incident and exit surfaces of each cone lens have a circular conical shape, and the cone lens has at the center has a center hole having a smaller diameter than the circular laser beam entering the cone lens. The circular laser beam is converted by the cone lenses into a double circular beam having an annular ring section and a spot section located at the center of the ring section. The converted laser beam is applied to objects to be soldered.

The invention relates to a method for preparing quartz crystal devices by laser soldering seal, including that: (1) a ceramic packaged foundation support internally provided with quartz element is prepared; (2) an opening is opened around the upper end of the ceramic packaged foundation support to form a kovar alloy ring; and (3) a metal cover and the kovar alloy ring are welded so as to package the ceramic packaged foundation support; the method is characterized in that in the step (3), a laser beam is utilized to weld the metal cover and the kovar alloy ring in a sealing way. Compared with prior art, the invention has the following advantages: non-contact distant laser welding technology is adopted, production efficiency is greatly improved, heat affected zone is small, welding point ispollution free, welding quality is greatly improved, and deformation and dislocation problem of the traditional metal cover is avoided. The encapsulation method of the invention has high production efficiency, fast welding speed, large depth and small deformation and is especially applicable to small size micro welding and mass production.

A method for laser keyhole welding of metal alloys is disclosed. The method independently adjusts power in a focused center beam and power in a concentric focused annular beam. At the termination of a weld, the power in the center beam is initially ramped up and then ramped down, while the power in the annular beam is ramped down. Increasing the power in the center beam enables a controlled and prolonged contraction of the keyhole and melt pool, thereby preventing undesirable cracking.

The invention discloses an automatic laser welding device with a CCD vision detection function and a welding method. The device comprises a laser device and a rack cover and further comprises a feeding device provided with a guide rail positioning benchmark, a clamp, a feeding shaft and a rotary pressing air cylinder and horizontally arranged on the laser platform, a two-dimensional laser arranged at one end of the laser platform and provided with a first laser head, a four-dimensional laser arranged at the other end of the laser platform and provided with a second laser head and a CCD vision positioning camera, and a PC controller arranged in the rack cover. The automatic laser welding device has the beneficial effects that the device obtains an image signal of a target through the CCD vision positioning camera, the PC controller calculates a corresponding target position and drives the device to conduct position positioning, the welding precision is improved due to use of machine vision and image processing, tool and product errors are avoided, and influences of human factors on product quality is avoided.

A laser welding method of the present disclosure includes a first step, a second step, and a third step. In the first step, a first workpiece and a second workpiece are stacked on each other. Each of the first workpiece and the second workpiece has a surface coated with a first material and is made of a second material, which is different from the first material. In the second step, a first region in which the first workpiece and the second workpiece are stacked on each other is irradiated with a laser beam so that the laser beam penetrates both the first workpiece and the second workpiece. In the third step, a second region including the first region is irradiated with a laser beam in a spiral fashion.

Disclosed is a multi-directional adjustment welding device for laser-MIG/MAG welding equipment. A laser lighting gun and a welding gun of the laser-MIG/MAG welding equipment can be assembled on the multi-directional adjustment welding device, a first driving motor drives a first lead screw to enable a first support to move along two linear flat guide rails in a vertical reciprocating mode in a Z direction, a second driving motor synchronously drives a second lead screw to enable a right-angled seat to move along a positioning cylinder in a horizontal reciprocating mode in an X direction, a third driving motor drives a third lead screw to enable a third support to move along two round guide rails in a horizontal reciprocating mode in a Y direction, and a fourth driving motor drives a clamping seat to move along long-sector guide rails towards the arc surface of a sector in a reciprocating mode. The Z direction, the X direction and the Y direction form a three-dimensional coordinate system and form the four-directional, namely, multi-directional adjustment when combined with the A direction. The welding gun is fixed onto a welding gun clamp and the laser lighting gun is fixed onto the first support. The multi-directional adjustment welding device for the laser-MIG/MAG welding equipment has the advantage of achieving the four-directional position adjustment of the laser lighting gun and the welding gun and being novel and unique in structure.