253 results about "Shot welding" patented technology

Provided are: a high-strength galvanized steel sheet having exceptional bendability, spot weld crack resistance, stretch-flangeability, and axial crushing stability; and a method for producing the same. This high-strength galvanized steel sheet is provided with a steel sheet and a specific galvanizing layer, the steel sheet having a specific component composition and a steel structure that contains ferrite- and carbide-free bainite in a total area ratio of 25% or less (including 0%), bainite containing tempered martensite and carbide in a total area ratio of 70-97%, martensite and residual austenite in a total area ratio of 3-20%, and residual austenite in an area ratio of 1-5%, the steel structure being configured such that the total area ratio of the ferrite- and carbide-free bainite, the martensite, and the residual austenite is 3-30%, the C level in the residual austenite is 0.10-0.50%, and the average crystal grain size of the carbide-containing bainite and the average crystal grain size of the tempered martensite is 5-20 [mu]m.

This system includes: (1) the soldering plates (SP) residing on the printed circuit board (PCB), (2) the photo recognition points (PRP), which contrast differs from ambient, (3) the etch points (EP) remained from removing PRP on SP, (4) the soldering resistance (RS) area with openings around PRP, and (5) the plating layer on this RS opening area. This invention also offers a manufacture method for the PRP on a flexible PCB. It includes steps of 1) etching a PRP on SP, 2) making RS on SP, making openings around PRP on RS area, and then plating the opening area. On the flexible PCB made by this way, the color contrast between PRP and the ambient is rather high. The shape of PRP is round. Due to the good photo recognition effect, the surface stick installation machine can accurately orientate with the aid of photo recognition.

A removable two-ring clamp has a first segmented ring assembly and a second segmented ring assembly that pivot relative to one another and can be individually loosened and tightened. The first ring assembly is received on and secured around an end portion of a first tubular section and the second ring assembly is received on and secured around an end portion of a second tubular section. The ring assemblies, when loosened, allow relative pivotal movement therebetween and allow the tubular sections to be rotated about their axes relative to one another to accommodate positioning the axes of the sections in any combination of planes, and when tightened, firmly hold the two tubular sections concentrically end-to-end in the proper position while a small tack weld or bonding agent is placed at their joined ends.

The invention discloses a technology for welding a carbon steel overlaying welding layer of a tube plate of a high pressure heat exchanger with a low carbon steel tube in a sealing way, comprising the following technological processes, i.e. a step one of welding carbon steel on the tube plate of the high pressure heat exchanger in a submerged arc overlaying way, thermally treating the overlaying welding layer and the tube plate under the condition of passing 100% UT (Ultrasonic Test) and 100% MT (Magnetic Test) flow detection, and increasing the overlaying welding layer to the range of 6mm to 8mm in a machining way, wherein the groove structure of the tube plate is in the form of an aligned groove, the low carbon steel tube is aligned with the overlaying welding layer of the tube plate, and the sealing welding groove of the overlaying welding layer of the tube plate is chamfered at 2*45 degrees; a step two of preheating to 80 DEG to 100 DEG before welding, and welding the low carbon steel tube in the groove of the overlaying welding layer of the tube plate in a point way before welding as well, wherein the point welding enables the root part to be thoroughly welded without welding sticks; a step three of implementing sealing welding on the groove by adopting an automatic argon arc welding, implementing 100% PT (Penetration Test) flow detection on the welded junction after the completion of sealing welding, and eliminating surface defects of the welding line. According to the technology for welding the carbon steel overlaying welding layer of the tube plate of the high pressure heat exchanger with the low carbon steel tube in the sealing way, the surface of the welding line of the carbon steel subjected to the sealing welding is smooth and flat, and no needle-like air holes are formed in the near surface and the surface of the welding line; therefore, the long-term scour by supplied water can be completely withstood.

A sacrificial anode assembly operative to inhibit corrosion in the metal tank portion of a water heater includes a cylindrical metal anode member having an end retained within a tubular, electrically non-conductive plastic insulating sleeve which, in turn, is captives retained within a metal cap portion of the assembly. A resistor is received in an end surface groove of the sleeve and has a lead wire spot-welded or soldered to a core wire portion of the anode member. To prevent contact between the lead wire and the metal cap, and to protect the lead wire against vibration caused breakage at its spot weld or solder area, a U-shaped central portion of the lead wire is received in a through-opening in the resistor-supporting end of the sleeve which is covered by an annular insulating wafer formed from an electrically non-conductive material.

The invention relates to a method for distinguishing a welding bead based on colour information. The method comprises the following steps of in sequence: gaining a training image; acquiring training data and training through a support vector machine so as to obtain a classification hyperplane; reading a series of continuously-shot welding bead images to be distinguished; setting more than one ROI (Returner of Open Interface) on the welding bead images based on the apriori information; respectively extracting and storing a colour information vector of each pixel within each ROI on the welding bead image; identifying the colour information vector of each pixel into the testing data; classifying the testing data within each ROI range according to the classification hyperplane in previous step; defining that the testing data belongs to the welding bead pixel or the base material pixel; marking the classifying results; sequentially classifying the welding bead image of each frame; and determining the side edge of the welding bead according to the classifying result within each ROI of the welding bead image to be distinguished. The method for distinguishing the welding bead based on the colour information can be widely applied to the automatic distinguishing process of welding robots or other automatic equipment and technologies to the welding bead, such as groove detecting, wed joint tracking, post-welding nondestructive detecting tracking, weld joint formation quality detection and material surface detection.

The invention discloses an automatic welding device and a welding process thereof. The welding device comprises a vertical column, a transverse arm and a welding gun, wherein one end of the transverse arm is arranged on the vertical column, the other end of the transverse arm is provided with a main shaft and a main shaft motor, the main shaft motor is used for driving the main shaft to rotate, the main shaft is provided with a welding wire delivery machine, the welding wire delivery machine is used for delivering welding wires to the welding gun, the main shaft is provided with an X-axis slide rail, a Z-axis slide rail is arranged on the X-axis slide rail, a rotary body is arranged on the Z-axis slide rail, and the welding gun is arranged on the rotary body. The welding process comprises the following steps of utilizing a tooling clamp on a base to position a welding workpiece; enabling a manual pull rod on an elastic center rod to lift the elastic center rod, putting another welding workpiece under a press head, and pressing and positioning the two welding workpieces together; adjusting the position of the welding gun, and driving the main shaft and the slide rails to weld a welding seam; after welding, lifting the elastic center rod, ascending the press head, and taking off the welding workpieces. The automatic welding device and the welding process have the advantages that the pre-fixing for manual point welding is not needed, and the welding production efficiency is improved.

The invention discloses a comprehensive evaluation method for welding hot crack sensitivity. The method can be used for simultaneously evaluating hot cracks such as solidification cracks, liquefactioncracks, high-temperature delayed cracks and the like in the welding process, and is suitable for austenitic stainless steel and nickel-based materials. Fixed-point welding and arc extinguishing are carried out at the center of a sample, then bending is carried out, an optical microscope is adopted to observe areas near a weld joint and a fusion line, hot crack types are distinguished, the numberof cracks of different types, the total length of the cracks, the maximum length of the cracks, the crack distribution range and the like are counted, and a corresponding relation with strain is established, so the sensitivity of different types of hot cracks is evaluated. The method is simple, the hot crack type is easy to distinguish, the cost is low, the test result is real and reliable, and the method has important significance for evaluating the welding hot crack sensitivity.

The invention provides a robot spot welding parameter and welding quality virtual debugging method, device and equipment and a readable storage medium. The method comprises the steps that a first welding specification parameter table is generated according to obtained welding spot basic information; the welding parameters of the first welding specification parameter table are filled into the corresponding positions of a second welding specification parameter table according to the matching relation between the second welding specification parameter table and the first welding specification parameter table; and after virtual debugging is carried out on a robot offline program according to the second welding specification parameter table, the offline program is imported into a robot controller, so that the robot controller carries out welding control work according to the robot offline program. According to the robot spot welding parameter and welding quality virtual debugging method andthe device, the robot spot welding parameter and welding quality can be virtually debugged, the debugged offline program is automatically imported into the robot controller, the processes of compiling an engineering operation table, manual teaching and the like are omitted, and therefore the production efficiency and accuracy of a welding production line are effectively improved, and the labor cost is saved.

The invention relates to a zinc-nickel secondary sealed cylindrical alkaline battery adopting a nickel-plated shell as a negative electrode, and the zinc-nickel secondary sealed cylindrical alkaline battery comprises a nickel-plated shell, a sealing ring and a nickel-plated cap, wherein an electrode assembly which is arranged in the nickel-plated shell consists of a lug negative plate with a negative electrode, a diaphragm and copper foil or tinned copper foil sticker and a lug positive plate with a positive electrode, a diaphragm is arranged between the lug negative plate with the negative electrode and the lug positive plate with the positive electrode, and the zinc-nickel secondary sealed cylindrical alkaline battery is characterized in that firstly a tinned copper-strip stretch net, a tinned brass-strip stretch net or a zinc-strip stretch net is used as a negative electrode current collector, so that compared with a perforated negative electrode current collector, the zinc-nickel secondary sealed cylindrical alkaline battery has the advantages that the utilization rate of materials can be doubled; and secondly, one copper foil or tinned copper foil surface in the diaphragm and copper foil or tinned copper foil sticker is contacted with and wraps the lug negative plate with the negative electrode on the outer circle of the electrode assembly, the other surface is closely contacted with the inner wall of the nickel-plated shell, and a negative lug on the negative electrode end of the electrode assembly is in spot welding connection with a negative gasket which is welded on the bottom of the nickel-plated shell. The invention also provides a manufacturing method of the battery. The zinc-nickel secondary sealed cylindrical alkaline battery has the advantages of more reasonable structure, excellent electric performance, longer service life and higher production efficiency.

The invention discloses network storage equipment with a good buffer protection effect. The network storage equipment comprises a fixed sleeve, sliding grooves, sliding blocks, a movable column, a first telescopic spring, a network storage equipment body, a piston rod, a first air guide pipe, a connecting block, a first inflatable airbag, a corner air buffer device, second telescopic springs, a second air guide pipe, an elastic column, a fixing rod, a rubber stop block, a through hole, a fixed block, a T-shaped rod, antiskid strips, antiskid particles, a piston sleeve and a sealing cylinder; the fixed sleeve is arranged outside the network storage equipment body, the second telescopic spring is fixed between the inner corner of the fixed sleeve and the outer corner corresponding to the network storage equipment body through spot welding, and the corner air buffer device is installed at the outer corner of the fixed sleeve; sliding grooves are formed in the top inner wall and the bottominner wall of the fixed sleeve. According to the invention, a comprehensive multi-stage cooperative buffer protection effect can be provided when the equipment is impacted by external force or accidentally falls onto the ground.

The invention discloses a large-diameter thin plate sealing membrane and a turning anti-deformation method. The large-diameter thin plate sealing membrane is applied to high-temperature high-pressure heat exchanger products. A sealing membrane made of a nickel-chromium-iron alloy SB-168NO6600 material is expensive in price, high in requirements of manufacturing precision and strict in requirements of surface roughness and unevenness of parts due to application of sealing. The turning anti-deformation method of the large-diameter thin plate sealing membrane comprises the steps of: machining a disc-shaped steel plate part into a saucer shape (1); making a blind hole (2) with a concentric diameter smaller than the disc diameter and a thickness smaller than that of the disc on the disc; additionally mounting an auxiliary cushion plate with an enough thickness below a part to be processed; providing an opening on the cushion plate; firmly point-welding the cushion plate with the part at the position of the opening, and placing the assembly in a bowl-shaped part filled with water for fixing; carrying out underwater vertical turning; and timely dissipating the cutting heat produced in a turning process in the machining process. The large-diameter thin plate sealing membrane is applied to the sealing of high-temperature high-pressure heat exchangers.

The invention discloses a welding spot quality detection method and device based on multi-model fusion and a storage medium, and the method comprises the steps: obtaining a welding spot technological parameter data set in a resistance spot welding process, and dividing the welding spot technological parameter data set into a training set and a test set according to a preset proportion; adopting a machine learning algorithm to construct a plurality of single welding spot quality detection models, and inputting the training set into each single welding spot quality detection model for training; evaluating each trained single welding spot quality detection model according to a preset evaluation index, and selecting the single welding spot quality detection model with good evaluation performance as a base classifier; and inputting the test set into each base classifier, and fusing output results of all the base classifiers according to a preset rule to obtain a welding spot quality detection result. According to the embodiment of the invention, the method can effectively prevent the model from being over-fitted, has good generalization capability, improves the robustness of the model, and achieves the improvement of the accuracy and detection efficiency of the quality detection of the welding spots.

The invention provides a welding quality evaluation method and system based on ultrasonic image feature fusion, and relates to the technical field of welding quality detection. The method and system aim at obtaining three-dimensional information of internal defects of a welding joint through B scanning and C scanning images of ultrasonic detection, fusing a plurality of defect feature quantities through information entropy, realizing comprehensive characterization of welding quality and improving welding quality, and evaluation information is comprehensive and high in accuracy. The method comprises the steps that S1, ultrasonic detection is conducted on a backfill type friction stir spot welding joint, and a B scanning image and a C scanning image of a welding area are collected; S2, the obtained B scanning image and the C scanning image are analyzed and processed, effective information in the images and defect features in the welding spots are extracted, and three-dimensional information representation of the welding quality is formed; and S3, different weight coefficients are endowed to the characteristic quantity in the three-dimensional information representation by using the information entropy, and the weight coefficients are fused into a comprehensive index as an evaluation result. The technical scheme provided by the invention is suitable for the welding quality evaluation process.

The invention provides a rapid welding workstation for a wind wheel, and relates to the technical field of welding operation auxiliary devices. The rapid welding workstation for the wind wheel comprises a robot control system, a robot welding system, a welding machine system, a positioner system and a positioning tool system, wherein the robot welding system is arranged on one side of the robot control system, the welding machine system is arranged on one side of the robot welding system, the positioner system is arranged at the front end of the robot welding system, the positioning tool system is arranged in the center of the top of the positioner system, and a rear disc and a plurality of blades are arranged in the center of the positioning tool system. According to the workstation, by designing a novel welding clamp, the position accuracy between the blades and the rear disc is guaranteed; and meanwhile, by using the welding clamp, a mechanism for positioning the positions of the blades is simplified, workers only need to place the blades on a blade positioning device, the previous scribing work and pre-spot-welding work are not needed, and the production efficiency of the workers is greatly improved.

The invention discloses a welding machine control system. The welding machine control system comprises a welding current control module used for controlling the welding current, an arc voltage controlmodule used for controlling the arc voltage, a welding speed control module used for controlling the welding speed, a welding angle control module used for controlling the welding angle, a protectiongas flow control module used for controlling the protection gas flow, a database module used for storing table data of the weld joint state and a welding parameter adjusting method, a weld joint image shooting module used for shooting a welding joint image, and a weld joint image analysis module used for analyzing the shot weld joint image. According to the welding machine control system, the defects in the prior art can be overcome, and the control accuracy of a welding machine in a complex working condition is improved.

The invention relates to a line feeding positioning system for three big assemblies of a lower vehicle body and a line feeding positioning method. The line feeding positioning system comprises a movable lower vehicle body splicing platform, a front vehicle body precise material frame used for positioning a front vehicle body and two sliding centering platforms which are used for positioning a front floor and a rear lower vehicle body. After the front floor and the rear lower vehicle body are positioned through the sliding centering platforms, carrying robots feed the parts to the movable lowervehicle body splicing platform. The front vehicle body adopts the precise material frame, a track is fixed and centered, and a carrying robot feeds the parts; after the three big assemblies are fed,a big assembly positioning clamp on the movable lower vehicle body splicing platform carries out positioning, and a point welding robot carries out welding positioning; and after welding is completed,a seven-axis robot carries the top cover to the next station. The line feeding positioning system has the beneficial effects that possibility of whole vehicle type flexibility is achieved, and the system structure reliability is high.

The invention relates to the field of gas shield welding, in particular to a solid welding wire gas shield welding method for nickel-based plate type splicing. A single groove or double grooves is/are formed in a butt joint weld joint, when complete through welding is required, the height of the truncated edge of the groove is less than or equal to 2 mm; the misalignment amount of the groove is controlled through a welding misalignment control tool to be within the following ranges that the misalignment amount of the single groove is less than or equal to 0.8 mm, and the misalignment amount of the double grooves is less than or equal to 2 mm; the butt joint weld joint is subjected to point welding, and the welding misalignment control tool is disassembled; and the two sides of the groove are both welded through nickel-based solid welding wire gas shield welding, after one side is welded, the other side is welded, the square groove side is firstly welded when the single groove is adopted, and the clad metal thickness of a single layer weld pass is less than or equal to 4 mm during welding. The solid welding wire gas shield welding of nickel-based materials is achieved through the solid welding wire gas shield welding method; a mixed gas of Ar+CO2 can serve as a protective gas, and the welding cost is reduced; the solid welding wire gas shield welding method can be used for all nickel-based plate type butt joint weld joints, especially nickel-based weld joints with high restraint stress.