37 results about "Fusion width" patented technology

The invention discloses a power battery anti-explosion valve welding assembly. The power battery anti-explosion valve welding assembly comprises a platform, a portal frame fixed to the upper surface of the platform, a galvanometer welding assembly connected to the portal frame, and at least one blowing device, wherein each blowing device is used for forming a sealed blowing environment for containing a power battery anti-explosion valve to be welded, and the welding laser generated by the galvanometer welding assembly penetrates the blowing devices to weld the power battery anti-explosion valves to be welded in the sealed blowing environments to a power battery cover plate. The power battery anti-explosion valve welding assembly is high in welding speed, the flow and the pressure of protection gas are uniform, the purity of the protection gas is high, the welding seam surface is flat and smooth, and the consistency of the fusion depth and the fusion width is high.

The invention discloses a method for rapidly determining the welding parameter of an electron beam, comprising the following steps of: determining welding working distance S, and selecting accelerating voltage Ua and welding speed v; determining welding current Ib through critical penetration beam Ic; determining focusing current If through surface focusing current Iof; and modifying the welding beam current Ib. The invention has the advantages that the test method focuses on the determination of the focusing current instead of the determination of welding beam current conventionally on the basis of the laws that the electronic beam welding beam current affects little on the shape of a seam, the shape variation of the seam along with the welding beam current is similar to the whole scaling, the focusing current affect the seam shape more and the fusion width, depth and shape of the seam are dramatically varied, and the like. The invention has obvious advantage in the engineering practical application.

The invention discloses a determination method for heat source model parameters in multiplewire submerged-arc welding by numerical simulation. The determination method comprises the following steps of: determining a heat-flow density distribution function in the multiplewire submerged-arc welding process; initially determining the heat source model parameters, wherein the heat source model parameters to be determined includes Ui, Ii, v, n, taui, etai, alphai, f<fi>, bi, ci, a<fi>, and a<bi>; and finally determining a heat-source model, wherein the determined parameters are substituted into the heat-flow density distribution function q(x, y, z, t) which is then taken as a thermology boundary condition for repeated iterative computations by a numerical simulation tool, the computation result of iterative computation of each time is compared with the shape of a joint fusion pool obtained by actual welding, the heat-source model parameters bi, ci, a<fi>, a<bi> are gradually adjusted by a range of 5% according to the comparison results until the errors between the parameters of the fusion depth and the fusion width of a simulated fusion pool and the fusion depth and the fusion width of the actual joint fusion pool are smaller than 10%, and then the determination of the heat-source model parameters in the multiplewire submerged-arc welding is finished.

This disclosure proposes a method and system for establishing a model related to welding process parameters and weld bead forming parameters, using CO 2 The gas shielded welding method was used to carry out welding experiments, and the parameters of the weld bead under different welding process parameters were obtained; based on the quadratic general rotation regression analysis method, the relationship between the weld width, reinforcement and weld cross-sectional area with regard to welding current and welding speed was initially established. Quadratic regression equation; perform parameter optimization to obtain the quadratic regression equation of weld width, reinforcement and weld cross-sectional area after inspection with respect to welding current and welding speed; reverse code the regression equation to obtain CO after reverse code 2 Gas shielded welding bead forming parameters weld bead width, reinforcement and weld cross-sectional area and welding process parameters welding current and welding speed correlation model. Through this model, not only the welding process parameters for forming the required weld bead can be determined, but also the weld bead forming parameters can be determined according to the welding process parameters.

The invention discloses a fusion depth and fusion width detection method for a thin-wall material welding face. The fusion depth and fusion width detection method is conducted specifically according to the following steps that 1, to-be-detected thin-wall material is cut, the cut face is cleaned after cutting, and thin-wall material fragments are obtained; 2, the thin-wall material fragments are inlaid, and an inlaid sample piece is obtained; 3, the inlaid sample piece is polished and ground, and an accurately ground sample piece is obtained; 4, etchant solution is prepared, metallographic etching is conducted on the accurately ground sample piece, and an etched sample piece is obtained; and 5, the etched sample piece is detected by a fusion depth detector, and fusion width and fusion depthdata of the etched sample piece are obtained. The fusion depth and fusion width detection method is simple and efficient to operate, accurate, reliable and suitable for detection of automatic mass production. Weld joint quality can be reflected visually, accurately and reliably, and through weld joint fusion depth detection and quantitative analysis, welding energy, focal length, rotation speed,bursting tests and other abnormal causes appearing in the welding process can be analyzed conveniently, quantitatively and qualitatively.

A method for arc-assisted laser welding. The dual-focus laser used in the present invention consists of a single laser beam, which is divided into dual-focus laser beams by an optical beam splitting system. The focus points of the dual-beam lasers vertically distributed along the direction of the welding seam can be interlaced with each other, which is sufficient and effective. When its high power acts as a welding heat source, it is beneficial to increase the penetration depth, agitate the molten pool, and effectively reduce pores and splashes. At the same time, by fine-tuning the focal length of the double focus, the weld penetration depth and fusion width can be adjusted. . When its low power acts as a heat source for heat treatment, it is beneficial to improve the smoothness of the welding surface, the uniformity of the weld, reduce pores and spatter, and improve the quality of the weld. In the method of the present invention, the laser energy is dominant, and a low-power single-focus laser is used. Pre-weld heat treatment of the workpiece with the arc, through the plasma interaction between the arc and the double-focus laser heat source, the absorption rate of laser energy is improved to enhance the laser "hole" effect to obtain greater welding penetration or welding speed.

The invention proposes a vision-based on-line measurement method for weld formation characteristics of thick plate T-shaped joint welding, which can perform on-line measurement of penetration depth, fusion width and cross-sectional area of ​​weld formation. Firstly, according to the extracted weld profile, the feature point recognition algorithm of the weld profile is designed based on the slope mutation and supervision method to realize the detection of feature points; secondly, aiming at the influence of various random disturbances in welding on the feature point detection of the weld profile, a method based on Three exponential smoothing methods are used for fault diagnosis, and further effective feature points are obtained; finally, using the weld profile and feature points extracted before welding and during welding, the high-order nonlinear fitting method is used to calculate the weld penetration depth, fusion width and cross-sectional area. The invention helps to control the welding seam formation by effectively measuring the characteristics of the welding seam formation, and then realizes the on-line monitoring of the welding quality. It has the advantages of reduced time consumption, high measurement accuracy and strong robustness.

A method for controlling penetration of fillet joints based on near-infrared binocular vision recognition, which involves a visual detection method for characteristic parameters of a weld pool and a detection method for reverse fusion width. The invention utilizes the method of combining front and back near-infrared scanning CCD camera devices with a computer image processing system and a control system to control the penetration of corner joints. First, select a suitable near-infrared scanning CCD camera device based on the principle of near-infrared; then acquire the melt pool image, including the melt pool characteristic parameters acquired by the near-infrared vision sensor on the front and the reverse side acquired by the near-infrared vision sensor on the back Welding width, and then image processing and analysis are performed on the obtained molten pool and its characteristic parameters, as well as the molten width on the reverse side, to obtain weld penetration information; finally, the penetration control is carried out by establishing a model through the obtained parameters. The present invention does not need to deduce the fusion width of the opposite surface. The use of the characteristic size parameters and characteristic shape parameters of the front melt pool image to characterize the fusion is avoided.