16 results about "Weld penetration" patented technology

This invention relates to the field of welding technology, specifically disclosing a welding device for a snow sweeper roller brush bracket, applied to the welding of the cover and side plates of the roller brush bracket; it includes: a frame; a welding unit; a cover tooling unit; and a side plate tooling unit. This invention achieves automatic fitting and end alignment of the inner folded edges of the cover and side plates through the coordinated action of a V-shaped placement table and side plate positioning components, eliminating positional deviations; a drive motor drives the rotating shaft to rotate at a uniform speed, guiding the welding torch to move uniformly along the joint, eliminating speed fluctuations and trajectory deviations, ensuring uniform weld depth and width; the side plate clamping component is rotatably connected to the rotating shaft, keeping the side plate vertical and ensuring that the fitting state is not damaged throughout the welding process.

A laser welding method for a stagnation shield and a turbine blade for improving a weld quality. The laser welding method includes laying a welding wire along a gap between the stagnation shield and the turbine blade; melting the welding wire using a laser having a laser incidence angle of 30° to 70°; and forming a weld having a weld penetration depth of less than 200 micrometers by one welding pass or two welding passes.

This invention belongs to the field of welding technology, and particularly relates to a laser-TIG hybrid welding device and method that can increase weld width. Its features include a laser welding torch and a TIG welding torch. The TIG welding torch incorporates an ultrasonic micro-vibration component. The laser welding torch is connected to a laser generator, and the tail of the TIG welding torch is connected to a welding power source. The TIG welding torch contains a combined electrode, which includes a copper rod at the top and a tungsten electrode connected to the lower end of the copper rod. The ultrasonic micro-vibration component includes a transducer and an amplitude transformer connected to the transducer. The copper rod is located within the central hole of the transducer and the amplitude transformer. The tungsten electrode is connected to the amplitude transformer via an eccentric ceramic ring. A tungsten electrode sleeve is connected to the bottom of the amplitude transformer, and a nozzle is located on the outer side of the tungsten electrode sleeve. The bottom of the tungsten electrode sleeve is a concave mirror surface. The beneficial effects of this invention are: it is suitable for welding nickel-based alloys, significantly increases weld penetration, improves weld formation quality, enhances the welding capability of thick plates, and solves the welding problem of nickel-based alloy thick plates larger than 10mm.

The application provides a reaction kettle round pipe welding equipment based on double-gun symmetrical argon arc welding, and belongs to the technical field of round pipe welding. The equipment solves the problems of low welding efficiency, poor precision and single function of the existing round pipe welding. The equipment comprises a round pipe positioning and rotating mechanism and a rack walking mechanism. A standing follow-up mechanism is arranged on the front side of the round pipe positioning and rotating mechanism. A linkage dust collector is arranged on the right side of the standing follow-up mechanism. A rack adjusting mechanism is arranged on the upper end of the rack walking mechanism. A double-gun welding mechanism and a man-machine interaction mechanism are arranged on the front side of the rack adjusting mechanism. A weld tracking and flaw detection mechanism is arranged on the left front part of the rack adjusting mechanism. A polishing and dust collection mechanism is arranged on the right front part of the rack adjusting mechanism. The application realizes integrated closed-loop management and control of welding and detection of the reaction kettle round pipe, synchronous welding by double guns, weld tracking and self-adaptive adjustment and argon protection, ensures uniform weld penetration and avoids oxidation, has high welding precision and stable quality, and accurately checks weld defects.

The application discloses a quartz glass laser welding method and an atomic cell, and belongs to the technical field of atomic cell packaging. The method is characterized in that first and second quartz glass components are butted to form a joint interface, and CO2 laser beams are used for welding, which is divided into two steps of pre-welding and main welding. In the pre-welding, a first laser power is used for scanning to form a plurality of discrete fusion points to fix the components; in the main welding, a second laser power larger than the first laser power is used for continuous scanning to form a sealing weld. The interval between adjacent fusion points formed by the pre-welding is less than 1.5 times the diameter of a main welding spot, so that the main welding weld can completely cover and fuse the discrete points, and the weld is continuous and uniform. By controlling the laser power and the scanning speed, the weld penetration is stabilized at 0.5 mm-2 mm, the air tightness is better than 8*10 ‑11 Pa·m³ / s, and the heat affected zone width is less than 1.5 mm. The application further discloses an atomic cell prepared by using the method, which can avoid component displacement and stress concentration, realize sealing welding with high air tightness and low heat affected zone, and improve the long-term stability of the atomic cell.

The application relates to the technical field of welding detection, and discloses a laser non-penetration welding seam depth nondestructive detection method; laser visual sensing and ultrasonic phased array detection are coaxially integrated in a welded joint; high-quality collection of the three-dimensional appearance of a weld seam surface and internal acoustic information is synchronously completed in an optimal time window after welding; multi-source heterogeneous sensing information is deeply fused by using a characteristic layer fusion technology; a depth prediction model is constructed based on a machine learning algorithm; the industry problem that a single sensing technology cannot establish a reliable mapping relationship between a surface feature and internal depth is effectively solved; online, rapid, nondestructive, high-precision quantitative detection and real-time quality judgment of the laser non-penetration welding seam depth are realized; the detection efficiency, precision and reliability are remarkably improved; and an effective quality control solution is provided for intelligent manufacturing.

The application provides a press machine movable workbench no-bevel narrow-gap vertical welding method, and belongs to the technical field of press machine movable workbench welding. The technical scheme is as follows: a press machine movable workbench no-bevel narrow-gap vertical welding method comprises the following steps: selecting a welding mode according to the thickness of a thick plate; when the thickness of the plate is less than 120 mm, single-gun single-side vertical welding is adopted, and a ceramic gasket is attached to the side of the weld away from the welding gun; when the thickness of the plate is 120 mm or more, double-gun double-side vertical welding is adopted, and a square steel gasket is riveted in the middle of the weld; the assembled movable workbench is vertically hoisted to the front of a narrow-gap vertical welding system, welding is started, the welding gun is reciprocated in the weld, and the lifting movable platform controls the welding gun to move upwards along the weld. The application has the beneficial effect that it can effectively adapt to the thick plate welding scene of the press machine movable workbench and meet the core requirements of weld penetration and strength.

This invention discloses a laser welding method for quartz glass and an atomic gas chamber, belonging to the field of atomic gas chamber encapsulation technology. The method involves butt-joining first and second quartz glass components to form a bonding interface, and then welding using a CO2 laser beam, divided into two steps: pre-welding and main welding. During pre-welding, a first laser power scan is used to form multiple discrete weld points to fix the components; during main welding, a higher second laser power is used for continuous scanning to form a sealing weld. The spacing between adjacent weld points formed in the pre-welding is less than 1.5 times the diameter of the main welding spot, ensuring that the main weld completely covers and fuses the discrete points, guaranteeing a continuous and uniform weld. By controlling the laser power and scanning speed, the weld penetration depth is stabilized at 0.5 mm to 2 mm, with an airtightness better than 8×10⁻⁶ mm. ‑11 Pa·m³ / s, with a heat-affected zone width of less than 1.5 mm. This invention also discloses an atomic gas chamber prepared using this method, which can avoid component displacement and stress concentration, achieve high airtightness and low heat-affected zone sealing welding, and improve the long-term stability of the atomic gas chamber.

The utility model relates to a kind of impeller weld penetration detection tool, specifically a kind of narrow runner impeller weld penetration detection tool, to solve the technical problems such as low detection reliability, low detection efficiency, personnel work intensity is big and easy to cause occupational injury when adopting solvent removal type colored penetration detection method to narrow runner impeller weld detection.This utility model includes chassis, impeller support shaft, two support seats and two height adjusting devices;Two support seats are connected with chassis by one height adjusting device respectively;The top of two support seats is provided with limiting recess, the both ends of impeller support shaft are rotatably arranged in two limiting recesses during detection, and height adjusting device includes upper support piece, lower support piece and locking assembly;Lower support piece is fixedly connected with chassis, upper support piece is slidably connected with lower support piece, and support seat is fixedly connected on corresponding upper support piece;Locking assembly is used to lock the relative position of upper support piece and lower support piece.

This invention discloses a horizontal pre-assembly production line for H-beams, specifically relating to the field of H-beam welding. It includes legs, with slide rails fixedly connected to the legs. One end of the slide rail is fixedly connected to a fixed seat, and the other end is slidably connected to a movable seat. A web plate limiting assembly is mounted on the slide rail, with its output end connected to the movable seat. The web plate limiting assembly drives the movable seat to move along the slide rail. Both the fixed seat and the movable seat are equipped with a turning machine, and both the fixed seat and the movable seat have a turning plate rotatably connected to them. The output end of the turning machine is connected to the turning plate. This invention, through the symmetrical layout of the fixed seat and the movable seat, combined with side drive rollers and web plate support wheels, synchronously conveys the two side flanges and the middle web plate. This ensures that the two side flanges maintain strict synchronization and symmetry throughout the conveying, turning, and closing processes, providing stable joint assembly conditions for subsequent automatic or semi-automatic arc welding and plasma arc welding, thereby guaranteeing the consistency of weld penetration.

This invention discloses a method and system for macroscopic forming control in high-power single-mode laser welding, belonging to the field of laser welding quality monitoring and control technology. The method first establishes a complete quadratic polynomial mapping model between weld penetration depth and laser power, welding speed, and defocusing amount based on process experiments. Through time-scale analysis, a dimensionless number S is defined to characterize the relative magnitude of the evaporation and heat conduction effects at the top and bottom of the keyhole, establishing a keyhole stability criterion. Based on the threshold range of S and the penetration depth model, a process window for good macroscopic forming is defined. In actual welding, the S value is calculated according to process parameters, and combined with the process window, rapid judgment of weld forming quality is achieved. The dimensionless number S criterion provided by this invention quantitatively reflects keyhole stability from a physical mechanism perspective, avoiding the blindness of traditional empirical methods, and can efficiently achieve process parameter control, improving the forming quality and process development efficiency of thick plate laser welding.

This invention relates to a laser welding method for engine igniters. The method includes: laser spot welding and circumferential welding of an oxidizer nozzle and a fuel nozzle; laser spot welding of a secondary fuel nozzle and an inner bottom; laser spot welding of an ignition nozzle and an inner bottom, and a fuel nozzle and an inner bottom; laser spot welding and circumferential welding of a head blank and an inner bottom; laser circumferential welding of an ignition nozzle and an inner bottom; laser circumferential welding of a secondary fuel nozzle and an inner bottom; laser circumferential welding of a fuel nozzle and an inner bottom; and laser circumferential welding of an ignition nozzle and a head blank, and an oxidizer nozzle and a head blank. The weld penetration depth can reach 0.8–4.0 mm, making it more suitable for welding in small areas. The weld seam becomes narrower, which can be reduced to 0.8 mm. The weld seam width effectively solves the problems of easy weld collapse, easy weld penetration, and weld leakage. It is superior to arc welding and plasma arc welding in terms of efficiency, quality, and working environment pollution. The pressure resistance and sealing performance exceed the test indicators and do not deform under pressure.

This utility model relates to a variable-angle tooling for arc welding, specifically addressing the problem that fixed fixtures cannot provide the necessary flexibility when the workpiece needs to be adjusted to a specific angle for optimal welding. Non-ideal welding angles easily lead to insufficient weld penetration, poor weld formation, increased spatter, and even serious defects such as incomplete fusion and slag inclusions, significantly affecting the quality and reliability of the welded joint. Technical features include: a pair of bases; each base has two pairs of mounting screw holes; and a support assembly, a guide assembly mounted on the support assembly, a placement assembly mounted on the guide assembly, and an upper platform fixture fixing plate mounted on the upper surface of the placement assembly. This eliminates the need to replace the entire tooling set due to angle requirements, allowing adjustment to the optimal welding angle, reducing defects such as insufficient penetration and slag inclusions. The structure is relatively simple and easy to use.

The application discloses a kind of aluminum alloy variable polarity TIG deep penetration welding penetration prediction method and system, comprising: collecting welding pool image, input pre-trained type convolutional neural network to carry out pool state identification;If it is positive polarity stage, then the image is input to pre-trained semantic segmentation type convolutional neural network, the shadow area caused by pool area and small hole is marked, and the segmentation result image is obtained;Approximate depth of pool width and small hole is calculated based on the segmentation result image;The pool width and the approximate depth of small hole are input into the pre-trained integrated learning prediction model to predict the current penetration;The system includes image acquisition device, pool state identification module, feature region segmentation module, feature size calculation module and penetration prediction module;The application can realize the real-time prediction of aluminum alloy blind hole type deep penetration welding weld penetration, and provide support for energy control and process optimization of welding process.

The application belongs to the field of laser welding process monitoring and intelligent manufacturing, and discloses a laser welding penetration prediction method based on time-varying dynamic modal characteristics, which comprises the following steps: a data acquisition method; steam image, penetration data preprocessing and region extraction; time-varying dynamic modal decomposition; construction of steam dynamic modal feature set and correlation analysis with the penetration response; construction of a penetration prediction machine learning model; model training and optimization. The application has strong physical interpretability: the modal reflects the real dynamic process of the steam plume; the time-varying characteristics are captured: the TV-DMD can reflect non-steady-state behaviors such as ejection, collapse and pulsation; the prediction accuracy is significantly improved: compared with the traditional image feature method, the prediction error can be reduced by 30%-60%; and the application is suitable for complex welding conditions: it can be used for deep penetration welding, oscillating laser welding, steel-aluminum dissimilar welding and the like.