140 results about "Melt depth" patented technology

The invention relates to the technical field of automatic welding control, and particularly discloses a multi-station automatic welding cooperative control method for electric iron accessories, which realizes full-closed-loop accurate control of a welding process through multi-sensor data fusion and an intelligent optimization algorithm. According to the method, an infrared thermal imager, an acoustic emission sensor and an ultrasonic thickness measuring device are adopted to collect molten pool temperature field, sound wave frequency spectrum and fusion depth data in real time, after feature extraction, the data are input into a multi-target optimization model, and a Pareto optimal solution set is generated with the fusion depth, the width of a heat affected zone and phase change latent heat as optimization targets; dynamically adjusting a segmented welding-back path and process parameters on the basis of an optimization result, and triggering model iterative correction through ultrasonic online monitoring; the central control unit adopts space voxelization monitoring and a three-level collision avoidance strategy to coordinate operation of the multiple mechanical arms, and collision emergency protection is achieved in combination with flexible pressure sensing.

The invention discloses a coaxial composite laser welding method and a welding method of a flat wire motor winding, and relates to the technical field of laser welding, coaxial composite laser beams are adopted to act on the surface of a high-reflection material to form a welding pool, the coaxial composite laser beams comprise an outer ring laser beam and a core laser beam, the outer ring laser beam is a pulse laser beam, and the core laser beam is a core laser beam; the core laser beam is a continuous laser beam, the continuous laser beam forms a main molten pool, the pulse laser beam forms an auxiliary molten pool, and the main molten pool and the auxiliary molten pool have overlapped parts. The continuous laser and the pulse laser are combined, the main molten pool formed by the continuous laser and the auxiliary molten pool formed by the pulse laser are communicated in an overlapped mode, the pulse laser disturbs molten metal in the auxiliary molten pool and drives the molten metal in the main molten pool to achieve the oscillation stirring effect, and the laser energy absorption efficiency of the high-reflection material can be improved; and the energy distribution of the heat source can be optimized by adjusting the energy proportion and the focus point position, the energy state of the heat source is accurately controlled, and zero splashing is achieved.

The invention relates to the technical field of laser welding, and discloses a laser welding method for accurately controlling weld penetration. According to the invention, through fusion of coaxial multispectral sensing and a back monitoring unit, multi-dimensional information synchronous acquisition of weld front molten pool morphology, a temperature field and a back thermal radiation signal is realized, and limitation of single sensing is overcome; furthermore, a dynamic instruction is generated based on the extracted multi-characteristic parameters and an adaptive fuzzy PID algorithm, thereby realizing precise closed-loop control of laser energy and heat input, and improving real-time performance and robustness of control. Particularly, a digital twin model is introduced to carry out forward prediction, cross validation is carried out with back monitoring signals, a triggered lead compensation mechanism effectively overcomes hysteresis of traditional feedback control, finally, precision control and stable forming of weld penetration are achieved, the defects of incomplete penetration, burnthrough and the like are effectively avoided, and the welding quality is improved. And the device is particularly suitable for occasions with extremely high welding quality requirements.

The invention relates to the technical field of ship manufacturing welding, in particular to a large-wall-thickness Al-Mg alloy laser-MIG composite and friction stir welding coupled welding device and method for ships, and the device comprises a sequential system 1, a friction stir welding module 2 and a laser-MIG composite welding module 3; the laser-MIG composite welding module 3 comprises a laser sensing return device 3A, a welding gun swing control device 3B and a laser-MIG composite welding gun 3C; the laser-MIG composite welding gun 3C comprises an MIG welding gun and a laser welding gun, the MIG welding gun and the laser welding gun are coaxially arranged, an optical fiber laser is arranged in the laser-MIG composite welding gun 3C, the optical fiber laser has the functions of laser visual sensing, preheating and post-heating, and the device solves the contradiction between the penetration depth and the defect when a traditional welding method is adopted for the thick plate aluminum alloy for the ship. Axial force needed during friction stir welding can be reduced through laser preheating, the pressure of a main shaft of equipment is remarkably reduced, and the service life of a stirring head is prolonged.

To provide a method for growing a silicon crystal without substantially including defects.SOLUTION: A method for growing a single crystal silicon ingot by the continuous Czochralski method is disclosed. A melt depth and heat conditions are fixed during growth since a silicon melt is continuously replenished as the silicon melt is consumed; a crucible position is fixed; a critical v / G is determined by a hot zone structure; the continuous replenishment of silicon to the melt during the growth can grow an ingot at a fixed pulling speed coincident with the critical v / G while growing the substantial part of an ingot main body; and the continuous replenishment of silicon is achieved by periodical or continuous nitrogen addition generating a nitrogen doped ingot.SELECTED DRAWING: Figure 5

The invention discloses a laser welding method for a copper-aluminum composite material, which comprises the following steps of: performing upsetting thinning treatment on a three-layer sandwich structure base material to ensure that the total thickness of a welding area is 1.5 mm, the thickness of an aluminum layer is 0.9-1.1 mm (the deformation rate is 10-30%), the thickness of a copper layer is 0.2-0.3 mm, the surface roughness Ra is less than or equal to 1.6 mu m, and the surface roughness Ra of an oxide layer is less than or equal to 5 mu m; a 1064nm optical fiber laser is adopted, welding is conducted at the power of 85%-95%, the speed of 120-150 mm / s and the frequency of 4000-6000 Hz, the fusion depth is 0.3-0.6 mm, and the fusion width is 1.2-2.0 mm. By means of the method, the tensile strength of the connector can be larger than or equal to 110 MPa, the resistivity is smaller than or equal to 2.5 * 10 <-8 > omega.m, the problems that traditional welding strength is low and conductivity is poor are solved, batch quality consistency is ensured, and the method is suitable for the fields of new energy automobiles and the like.

The invention discloses a laser welding device and method capable of monitoring the welding penetration depth in real time, and belongs to the technical field of laser welding. The laser welding device comprises a laser processing module, a penetration depth measuring module and a control module; the measurement light can accurately enter the molten pool and reflect an echo signal, so that the measurement error caused by light path deviation is avoided; the control module is connected with the fusion depth measuring module and the laser processing module at the same time, transmitting signals and echo signals can be rapidly obtained and real-time fusion depth information can be calculated and analyzed by means of the high-frequency signal transmission and processing capacity, the laser processing module can be controlled to adjust parameters in time when the fusion depth is abnormal, the fusion depth is kept within a set range all the time, and the fusion depth measuring accuracy is improved. High-precision real-time closed-loop feedback from measurement to control is realized, the stability and consistency of welding quality are greatly improved, the rejection rate is reduced, and the production efficiency is improved.

The invention discloses a process optimization method for laser-arc hybrid welding seam forming, which comprises the following steps: S1, acquiring a plurality of parameters of a hybrid welding experiment, taking fusion depth and fusion width in the parameters as experiment output parameters, and taking other parameters as experiment input parameters; s2, parameters are analyzed through Spearman correlation coefficients, and then key parameters influencing welding seam forming are obtained; s3, obtaining a range level of a single parameter variable value in the key parameters through a single variable method; s4, a response curved surface mathematical model is established, and more parameter matrix schemes meeting the welding seam forming conditions are screened out through the response curved surface mathematical model; and S5, taking the two input parameter variables, namely the fusion depth and the fusion width, as optimization targets, and performing multi-target optimization on the parameter matrix obtained in the step 4 by using a second-generation non-dominated sorting genetic algorithm to obtain a final optimization solution of the optimization targets. Compared with an existing method for improving welding seam forming based on process parameters, the problems of insufficient efficiency, high experiment cost and the like are solved.

The invention belongs to the technical field of laser-hollow cathode arc composite welding. The embodiment of the invention provides a laser-hollow cathode arc composite coaxial welding torch and a welding method. In order to solve the problem that the fusion depth cannot be continuously increased when the laser power is relatively high, the space between the hollow cathode and the welding workpiece is cooled through compressed gas, and in order to enhance the cooling effect, a dry ice coolant is further arranged at a cooling gas outlet through a second channel, so that the cooling effect is improved. A dry ice cooling agent is sprayed to the space between the hollow cathode and the welding workpiece by means of the pressure of compressed gas, and the space between the hollow cathode and the welding workpiece is further cooled or metal steam, air, inert gas, plasma and / or welding plumes are discharged in a manner of blowing or sucking air from the center of the hollow cathode; therefore, the influence of gas above the electric arc and high-temperature ionization of the gas on laser transmission is avoided, and a larger fusion depth is obtained.

The present invention provides an adaptive laser welding method and apparatus. The method includes: establishing a relational database of welding conditions and process parameters; obtaining a first welding condition of a to-be-welded object; based on the relational database, retrieving second process parameters corresponding to a second welding condition that is closest to the first welding condition; performing welding using the second process parameters as initial process parameters, and monitoring whether the welding process meets the requirements; adjusting the process parameters until the welding process meets the requirements, and storing the adjusted process parameters as first process parameters corresponding to the first welding condition into the relational database. When the change in welding conditions causes a change in the penetration depth, an adaptive adjustment of the laser welding process parameters is achieved.

The invention discloses an industrial arc welding robot cross swing device and process, and relates to the technical field of arc welding, the swing device comprises an arc welding robot base, a plurality of swing arm mechanisms are arranged on the arc welding robot base, and every two adjacent swing arm mechanisms are connected through a joint mechanism; a welding gun body is fixedly arranged at the tail end swing arm mechanism, a welding wire is arranged at the output end of the welding gun body, and the swing arm mechanisms are used for driving the welding gun body to conduct crossed left-right angle swing motion in the weld joint advancing direction. It can be effectively guaranteed that a welding gun nozzle and a welding wire are away from base metal in the swinging process, and wire explosion and arc breaking caused by contact between the welding wire and the edge of the base metal in the vertical direction are prevented; by changing the orientation angle of a welding gun, a welding wire can directly face the left root and the right root of a welding seam, the penetration depth and the welding strength of the left root and the right root are increased, mathematical expressions of a swing track in the X + direction, the Y + direction and the Z + direction are defined, the expressions can be used for accurately controlling movement of a robot, and therefore high-quality welding seam swing welding is achieved.

The invention relates to the technical field of laser welding, and discloses a solid-state laser radar module packaging method and system.The method comprises the steps that a front shell and a rear shell of a solid-state laser module are subjected to laser welding packaging through historical output parameters, and parameters of a welding seam between the front shell and the rear shell after packaging is completed are collected; the flatness is compared with the preset standard flatness, whether the historical output parameters need to be adjusted or not is judged, the welding speed is adjusted according to the difference value of the flatness and the standard flatness, and the final value of the welding speed is obtained; comprehensively judging whether to adjust the laser power or not according to the depth comparison result and the width comparison result; and obtaining an adjustment coefficient of the laser power according to the fusion depth standard deviation, the fusion width standard deviation and the number of the unqualified collection points, and adjusting the laser power according to the adjustment coefficient to obtain a final value of the laser power. By dynamically adjusting the laser power and the welding speed, the stability and the welding seam quality in the welding process can be remarkably improved.

The present invention relates to the field of welding monitoring technology, and in particular to a welding monitoring system based on artificial intelligence, comprising: a data acquisition module for collecting welding parameters, welding torch parameters and weldment parameters; a welding torch monitoring module for analyzing the running state of the welding torch; a penetration monitoring module for analyzing the abnormality of the penetration; an early warning module for analyzing the welding state and providing a user with an abnormal welding state early warning according to the analysis result; a current monitoring module for monitoring the state of the welding current and constructing an abnormal welding current coefficient; a temperature monitoring module for constructing an abnormal welding temperature coefficient; a quality monitoring module for analyzing the welding quality state according to the abnormal welding state early warning result, the welding current abnormal coefficient and the welding temperature abnormal coefficient within the monitoring period, and providing a user with an abnormal welding quality state alarm according to the analysis result. The present invention improves the welding monitoring efficiency.

The utility model is applicable to the technical field of laser welding, and provides a laser welding penetration detection device which comprises a reference arm and a sample arm, the reference arm comprises a detection light source, an optical fiber coupler and a reflector, the sample arm comprises a scanning galvanometer, a first optical lens and a welding laser galvanometer, and detection light output by the detection light source is transmitted to the optical fiber coupler. After being input into the optical fiber coupler, the light is divided into reference light and scanning light, and the reference light returns to the optical fiber coupler through the reflector; the scanning light sequentially passes through the scanning galvanometer and the first optical lens and then irradiates the surface of a workpiece together with the welding laser through the welding laser galvanometer, the scanning galvanometer enables a first light spot to move with a second light spot as a reference system so that the scanning light can irradiate a key hole in the workpiece in real time, and the scanning light is reflected from the key hole and input into the optical fiber coupler. The optical fiber coupler generates an interference signal containing keyhole fusion depth data based on the scanning light reflected from the keyhole and the reference light returned by the reflector, and real-time detection of the keyhole fusion depth data in the welding process is achieved.

The invention discloses an online monitoring method for vacuum laser welding, which is characterized in that secondary current signals of vacuum laser welding are collected, association rules of the secondary current signals, weld forming and penetration depth are analyzed, and then the weld appearance of vacuum laser welding is actively controlled based on the secondary current signals. And finally, online closed-loop monitoring of the vacuum laser welding process is effectively realized.

The invention relates to the technical field of laser-electric arc hybrid welding, and discloses a laser-electric arc hybrid welding method and system. According to the method, molten pool vision, plasma spectrum, electric signals and temperature field data are collected in real time through multi-modal sensing, and after depth features are extracted and fused, a quality evaluation model based on Stacking ensemble learning is used for recognizing weld defects and confidence in real time; and when the confidence coefficient is insufficient or a defect tendency is detected, triggering a parameter decision optimized by multiple targets such as fusion depth, strength and the like, generating an adjustment instruction set, and executing dynamic fine adjustment after verification of a process knowledge base. The system correspondingly comprises a pose deviation compensation module, an online quality evaluation module, an optimization decision module, a strategy verification module and a parameter execution module. Intelligent sensing and self-adaptive accurate control in the welding process are achieved, and the welding quality stability and the defect suppression capacity are effectively improved.

The present application discloses a laser-arc hybrid welding method and a laser-arc hybrid welding system. The laser-arc hybrid welding method includes the following steps: operating an arc welding machine at a set pulse current; and obtaining the real-time welding current during the welding process, and controlling the power of the laser beam output by the laser according to the real-time welding current so that the power of the laser beam is at a first set value before the molten droplet falls into the molten pool and at a second set value after the molten droplet falls into the molten pool, wherein the first set value is less than the second set value. The laser is in a low-power state during the formation and detachment of the molten droplet, which can reduce the influence on the detachment process of the molten droplet and enable the molten droplet to stably fall into the molten pool. The laser is in a high-power state after the molten droplet falls into the molten pool, which increases the heat input, is beneficial to the penetration of the molten droplet in the molten pool, and increases the penetration depth. Synchronize the laser and the pulsed arc periodically to achieve coordinated control, improve the energy utilization rate of the laser, and improve the welding quality.

The invention belongs to the technical field of laser welding, and discloses a thin plate laser lap joint welding method and laser welding equipment. The power of the laser acting on the surface of the upper plate and the power of the laser acting on the lower plate are both smaller than the power of the laser acting on the center of the weld joint, that is, the laser power is in a low-high-low change trend in the direction from the upper plate to the center of the weld joint to the lower plate, and it is ensured that the laser in the center of the weld joint can penetrate through the upper plate; laser on the two sides of the center of the welding seam is controlled in the state that the laser cannot penetrate through the plate, so that energy input in different subareas of the welding seam is accurately controlled, it is guaranteed that the penetration depths of all the subareas are controllable and different, the problems that the penetration depths are unstable, the contour of a molten pool is discontinuous, and a lower plate is prone to penetrating are solved, the welding seam is good in consistency and free of inward concave or outward convex, and continuous smooth transition is achieved; the size measurement of the molten pool meets the standard requirements, the welding quality and the welding efficiency are effectively improved, welding wires are not needed, and the cost is effectively reduced.

The invention discloses an OCT-based laser welding penetration error correction method and system, and the method comprises the steps: constructing an OCT penetration detection device to collect the keyhole depth information of a workpiece in the laser penetration welding process, and obtaining the keyhole depth information of the workpiece; performing filtering and moving average processing on the keyhole depth information of the workpiece based on a moving average algorithm of percentile filtering to obtain a keyhole depth change curve of the workpiece; and error correction is carried out on the keyhole depth change curve of the workpiece through a long and short term memory neural network model to obtain a corrected keyhole depth change curve of the workpiece. By means of the method and device, interference generated by OCT measurement can be reduced, noise signals are formed, the interpretability of OCT fusion depth detection data is improved, and therefore the precision of laser welding fusion depth online measurement of OCT is improved. The OCT-based laser welding penetration error correction method and the OCT-based laser welding penetration error correction system can be widely applied to the technical field of laser welding penetration detection.

The present invention relates to the field of laser welding technology, and discloses a solid-state laser radar module packaging method and system, the method comprising: using historical output parameters to perform laser welding packaging on the front shell and the rear shell of the solid-state laser module, collecting the weld parameters between the front shell and the rear shell after the packaging is completed; comparing the flatness with the preset standard flatness, judging whether the historical output parameters need to be adjusted, adjusting the welding speed according to the difference between the flatness and the standard flatness, and obtaining the final value of the welding speed; comprehensively judging whether to adjust the laser power according to the depth comparison result and the width comparison result; obtaining the adjustment coefficient of the laser power according to the standard deviation of the penetration depth, the standard deviation of the penetration width and the number of unqualified collection points, adjusting the laser power according to the adjustment coefficient, and obtaining the final value of the laser power. The present invention can significantly improve the stability of the welding process and the quality of the weld by dynamically adjusting the laser power and the welding speed.

The invention relates to a method for determining a welding penetration depth of a welding process, in particular a laser welding process, comprising the following method steps: a. carrying out a set-up process, wherein, in the set-up process, a predefined welding process is carried out and information relating to a vapour capillary (100) is determined, b. determining a measurement geometry (200, 202, 204) taking into account the information relating to the vapour capillary (100), c. carrying out a productive process, wherein the predefined welding process is carried out and a welding penetration depth is determined on the basis of measurements of the vapour capillary (100) which are carried out using the measurement geometry (200, 202, 204).

The invention belongs to the technical field of laser welding, and discloses a thin plate laser lap joint welding method, a laser device and laser welding equipment. The power of the laser acting on the surface of the upper plate and the power of the laser acting on the lower plate are both smaller than the power of the laser acting on the center of the weld joint, the laser power is in a low-high-low change trend in the direction from the upper plate to the center of the weld joint to the lower plate, and it is ensured that the laser in the center of the weld joint can penetrate through the upper plate. Laser on the two sides of the center of the welding seam is controlled in a state of not penetrating through the plate, so that energy input in different subareas of the welding seam is accurately controlled, the controllable and different fusion depths of all the subareas are ensured, the problems that the fusion depths are unstable, the contour of a molten pool is discontinuous and the lower plate is easy to penetrate are solved, the welding seam is good in consistency and free of inward concave or outward convex, and continuous smooth transition is achieved; the size measurement of the molten pool meets the standard requirements, the welding quality and the welding efficiency are effectively improved, welding wires are not needed, and the cost is effectively reduced.

The invention belongs to the technical field of aerospace structural part welding and manufacturing, and particularly relates to a laser-electric arc hybrid welding method for a high-strength aluminum alloy cabin section. According to the method, a high stress concentration area and a deformation risk area are identified through pre-welding modeling and heat-force coupling simulation, then the laser and electric arc energy ratio is dynamically matched based on a heat input cooperation coefficient eta, and the welding speed and the laser defocusing amount are regulated and controlled in real time in combination with a weld joint forming stability index sigma calculated through a pre-trained LSTM model. And performing fusion depth compensation on the special area through the dynamic arc compensation factor phi, and finally optimizing the performance of the joint through postweld heat treatment. The method can adaptively cope with complex working conditions such as plate thickness fluctuation and track curvature change, defects such as air holes and hot cracks are effectively restrained, the internal defect rate of a welding seam is lower than 0.5%, the tensile strength of a welding joint reaches 90% or above of that of a base material, the method is adaptive to 2-series and 7-series high-strength aluminum alloy and complex welding seam tracks, and the welding quality is improved. And the harsh requirements of high reliability and long service life of aerospace structural parts are met.

The utility model provides a welding device and a welding system, and belongs to the technical field of batteries. The welding device comprises a base part and a pressing head assembly. The base part is used for supporting a first to-be-welded part and a second to-be-welded part which are stacked, and the second to-be-welded part is located above the first to-be-welded part; the pressure head assembly comprises a sleeve piece, a lens piece and a negative pressure pipeline; the sleeve part is located above the base part, and a welding opening in the bottom end of the sleeve part abuts against the top face of a second to-be-welded part in a sealed mode. The lens part is embedded in the sleeve part, and the lens part is used for transmitting the laser beam so that the laser beam can irradiate a second to-be-welded part in the welding opening; the negative pressure pipeline is connected with the sleeve piece and used for vacuumizing the interior of the sleeve piece. According to the welding device, slag splashing and weld joint air holes can be reduced, the fusion depth can be greatly increased, the required fusion depth can be achieved with low laser power, and therefore heat input generated during laser welding is greatly reduced, and the welding cost is reduced.

The invention belongs to the technical field of laser welding, and discloses a medium-thickness plate welding process without beveling, three groups of laser arrays are adopted for welding, the first laser array completely covers a butt joint gap to generate a stable molten pool with shallow depth and large melting area, and the second laser array melts and gasifies materials to form a deep melting key hole. The third laser array acts on the rear wall of the deep melting key hole to maintain the opening state of the key hole, and the third laser array, the first laser array and the second laser array jointly act to form a Y-shaped large key hole; due to the fact that the three sets of laser arrays are adopted for parallel machining, the total welding input energy can be accurately controlled, large-penetration-depth single-time welding of pure laser is achieved, and meanwhile the problems of welding deformation and incomplete penetration during multi-pass welding are solved; the to-be-welded workpiece does not need to be beveled in advance, the workpiece does not need to be cleaned before welding, and the welding efficiency can be effectively improved.

The invention discloses a laser cladding process method for improving hardness, wear resistance and metallurgical bonding strength based on an S element, and belongs to the technical field of metal material surface modification. In the laser cladding process, the S-containing element powder is added into the mixed powder, so that the flowing mode of a molten pool is fundamentally converted, the phenomenon that the molten pool faces downwards is generated through the Malangori effect, the fusion depth of the molten pool is increased through the phenomenon, the bonding area of a cladding layer and a base body is increased, and the metallurgical bonding strength is enhanced; due to the fact that strong convection is generated in the molten pool, grains in the molten pool are refined, a fine hard phase is formed, the abrasion resistance and hardness of a cladding layer are enhanced, the service life of the cladding layer is prolonged, and the method is suitable for the field of remanufacturing and surface strengthening of industrial parts with extremely high requirements for surface abrasion resistance, impact resistance and coating bonding strength.

The invention discloses a Ta-10W alloy hybrid welding method for optical fiber laser focus rotation along with welding laser shock, and belongs to the technical field of welding. In the Ta-10W laser welding process, the laser focus rotation and laser shock composite technology is adopted, and the comprehensive beneficial effects of pore inhibition and penetration depth increase are achieved through the synergistic effect of the laser focus rotation and laser shock composite technology. According to the specific design, a focus rotating fiber laser and nanosecond high-energy pulse laser paraxial composite method is adopted, the distance between an impact laser spot and a welding spot is adjusted, the vibration regulation and control effect of impact waves generated by pulse laser on a keyhole and a molten pool is utilized, collapse of the rear wall of the keyhole is restrained, bubble escape is promoted, the pore size is reduced, and the porosity is reduced; and the influence effect of laser focus spin welding on welding seam depth reduction is reduced.

The invention provides a method for constructing a fusion width prediction model of a laser stitch welding interface. The method comprises the following steps: collecting surface fusion width data and fusion depth data of a plurality of welding seams of laser stitch welding of a first workpiece and a second workpiece which are overlapped with each other, and interface fusion width data at an interface position between the first workpiece and the second workpiece; and constructing a data set by taking the collected surface fusion width data and fusion depth data as input data and taking the interface fusion width data as output data, and training the interface fusion width prediction model by using the data set. According to some embodiments of the invention, a laser stitch welding interface fusion width prediction model can be constructed, so that convenient and non-destructive interface fusion width prediction can be realized by using the prediction model in production, and the evaluation of the laser stitch welding quality is facilitated. The invention further provides a corresponding laser stitch welding interface fusion width prediction method and system, electronic equipment and a computer program product.

The utility model relates to the technical field of metal processing devices, and discloses a rapid alloying device for a metal material surface, which comprises a processing rack, a laser setting assembly and a heating assembly, the processing rack comprises two groups of fixed mounting plates, a transmission assembly is arranged between the two groups of fixed mounting plates, and the laser setting assembly is arranged on the processing rack. And fixed arrangement frames are arranged at the outer ends of the two fixed mounting plates correspondingly, laser arrangement assemblies are arranged at the left ends of the tops of the fixed arrangement frames, and heating assemblies are arranged on the right sides of the laser arrangement assemblies. The all-directional guiding and traction device is arranged to be matched with the transmission assembly to achieve conveying treatment of metal raw materials, the laser treatment devices matched with each other are arranged to conduct laser gas alloying treatment on the metal surface, and the fusion depth of a molten pool and the depth of an alloying layer are increased. The thickness of an alloying layer and the content of alloying elements can be considered at the same time, heating and oxidation treatment are continuously conducted on the alloy layer in cooperation with a subsequent heating device, and the efficiency and quality of metal alloying treatment are guaranteed.

The present application relates to the technical field of electron beam welding, in particular to a tube sheet welding tool and a welding method, the welding tool comprises an inner support, a backing ring and a heat dissipation assembly, the inner support supports the pipe opening of the connecting pipe, so that the pipe opening of the connecting pipe is not prone to collapse during the welding process, the backing ring is supported on the side of the tube sheet away from the to-be-welded part to block and dissipate heat on the back side of the weld, so as to avoid melting through on the back side of the weld, and the control of the weld width and the penetration depth is realized, at the same time, the heat dissipation assembly is attached to the side of the backing ring away from the to-be-welded part to dissipate heat on the back side of the weld, so as to avoid the deformation of the tube sheet during the welding process, the cooperation of various structures ensures the welding quality and improves the fusion rate; the tube sheet welding method adopts the above welding tool and adopts the welding sequence of spot welding, pre-welding and formal welding, so as to avoid the collapse of the pipe opening of the connecting pipe during the welding process, and the weld width and the penetration depth are easy to control, and the welding quality and the fusion rate can be effectively improved.