91results about How to "Improve forming quality" patented technology

The invention relates to multifunctional self-adaptive laser metal 3D printing equipment and a control method thereof.The device comprises a spray head bottom plate and a laser cladding spray head, the laser cladding spray head comprises a spray nozzle used for outputting powder and a pipeline connected to the spray nozzle and used for conveying the powder, and a first converging assembly is installed on the spray head bottom plate; the end, away from the nozzle, of the pipeline is arranged on the inner side of the first gathering assembly, the powder is magnetized when passing through the first gathering assembly in the pipeline, and a gathering processing assembly used for repelling the magnetic powder is arranged on the outer side of the nozzle. Through the design of the first gathering assembly and the gathering processing assembly, powder is magnetized through the first gathering assembly during conveying, then the magnetized powder and the gathering processing assembly generate like-pole repulsion acting force when the powder is sprayed out of the nozzle, the powder is promoted to be gathered together to form a powder beam, powder divergence and irregular arrangement are reduced, and the powder quality is improved. And the position precision and the forming quality and precision of powder conveyed to the molten pool are improved.

The invention relates to the field of extrusion forming of piston skirts, in particular to an extrusion forming process of a large-size piston skirt of a marine diesel engine, which comprises the following steps of: placing a piston skirt raw material in a pre-forging annular die and a pre-forging lower die, pressing and moving downwards through a pre-forging convex die, forming a piston skirt pre-forging piece, taking out the pre-forging convex die, and replacing the pre-forging convex die with a finish-forging convex die; according to the method, the extrusion deformation process of the piston skirt is optimized, the internal metal deformation is smoother, the structure is more uniform, the metal flowing state of an area A with the most concentrated stress in the using process of the piston skirt is particularly improved, and the piston skirt forging is formed through downward pressing and movement of the finish-forging male die. And the overall quality is improved.

According to the sectional material group stretch-bending forming die and method based on the stretching arm type stretch-bending machine tool, through the combination mode of different parts and the combination of basic technical parameters of stretch-bending machine tool machining, the overall stretch-bending forming die is designed and constructed, and the technological method for multi-project sectional material group stretch-bending forming is achieved for the first time. The forming limitation different from traditional single part forming is adopted, the machine tool forming limit is utilized, parts which cannot be formed through a stretch-bending machine are combined to form a long blank, and the stretch-bending forming technology is achieved. According to the method, the reasonable stretch-bending forming die and the reasonable technological blank length are designed, parts such as bending parts, Yao machine forming parts and manual forming parts which cannot be subjected to stretch-bending forming can be formed in a stretch-bending forming mode, the internal pressure stress of the parts is converted into the tensile stress, the mobility of materials in the part forming process is balanced, and the forming quality of the parts is improved. And part forming springback is effectively reduced.

The invention provides a roll bending combined die for a carrier rocket special-shaped frame with multiple sections and a using method, the roll bending combined die comprises a middle front roller, a middle rear roller, a side roller, a side pressing wheel and a plurality of roller cushion blocks, the middle front roller is installed on the front side of the middle of the special-shaped frame, and the middle rear roller is installed below the rear side of the middle of the special-shaped frame. Side rollers and side pressing wheels are installed on the two sides of the special-shaped frame respectively, and roller cushion blocks are installed below the middle front roller and the middle rear roller. The method has the beneficial effects that a split combined die structure is adopted for roll bending forming of the profile frame, the number of dies is reduced, the production cost is reduced, and workers can conveniently transport and install the profile frame; the split combined die structure can select whether a cover plate needs to be installed or not according to profile characteristics, friction of a thin area at the top end of a part is reduced, and part forming quality is improved.

The present invention provides a progressive die for forming a multi-sub-sheet of an integral corrugated sheet, comprising an upper die assembly and a lower die assembly, wherein the upper die assembly comprises an upper die base, a discharge plate and a punch fixing plate fixedly connected to the lower end surface of the upper die base, and the lower die assembly comprises a lower die base, a die pad and a die fixing plate fixedly connected to the top of the die pad; a plurality of workstations are correspondingly arranged between the punch fixing plate and the die fixing plate, which are respectively from left to right in processing order: a first punching station, a first blanking station, a second blanking station, a first forming station, a second forming station, a second punching station and a third blanking station, thereby streamlining the mold and reducing the processing cost, and achieving the goal of large-scale continuous stamping of integral corrugated sheets with a single set of molds.

The application belongs to the technical field of additive manufacturing equipment, and relates to a non-contact powder spreading device for additive manufacturing, which comprises a powder storage groove, a powder controller and a control panel; the powder controller is arranged at the bottom of the powder storage groove; and the control panel is connected with the powder controller and drives the powder controller to open or close. The application can avoid the problems of knife sticking and powder sticking, and can also avoid the problems of deformation and damage of the formed part caused by scraping. The application can effectively improve the forming quality of the powder spreading type additive manufacturing equipment and is also beneficial to the realization of the non-support forming technology.

The invention discloses a CMT electric arc welding method for defect repair welding of a ZL114A aluminum alloy casting, and belongs to the technical field of defect repair of aluminum alloy castings. The method aims at solving the problems that an existing repair welding method for the ZL114A cast aluminum alloy is high in heat input, large in deformation and low in repair efficiency. The method comprises the following steps: firstly, aiming at defects of different sizes, machining the defects into regular spherical-crown-shaped grooves of different sizes by utilizing a cold machining method; an electric steel wire brush is used for polishing the inner wall of the groove and base metal around the groove, and surface stains and oxide skin are removed; the casting is placed on a welding workbench; robot CMT welding equipment is adopted for repair welding; and writing a welding gun repairing path on the robot demonstrator. And repair welding is carried out according to the following principles: repair welding is carried out by utilizing an Al-Si welding characteristic curve, a repair welding piece is preheated to 250-350 DEG C, shielding gas is started, and automatic repair is started according to the planned path, the wire feeding speed and the welding speed. By means of the method, high-quality repair welding seams without pores and cracks can be obtained.

The application discloses a V-shaped groove weld deviation detection method based on a YOLO model and groove reconstruction in the field of welding. First, a single YOLO model is trained to synchronously identify and intercept the left and right edge windows of a groove and the center window of a welding torch in a globally collected image of a welding area. Second, the groove edge window image is subjected to a gray scale transformation and a local adaptive threshold method, and the left and right edges of the groove are reconstructed in combination with a random sample consensus algorithm and a multi-level rollback mechanism. Then, the center of the groove is located by a midpoint recursion method based on the reconstructed groove edge, and the center of the welding torch is determined according to the center window of the welding torch. Finally, the deviation between the center of the groove and the center of the welding torch is calculated, and a two-level filtering mechanism combining Kalman filtering and moving average filtering is adopted to obtain a stable weld deviation value. The synchronous positioning of the double groove edges is realized by a single model, the arc light interference is effectively inhibited by combining the local adaptive threshold and the reconstruction method, and the robustness and precision of the weld deviation detection are improved.

The present application relates to the technical field of heavy-duty gas turbine, and particularly relates to a heavy-duty gas turbine high-temperature alloy welding defect intelligent identification and repair method. By acquiring a welding area infrared thermal image sequence to identify an abnormal temperature drop area as a candidate defect area, then performing defect verification and type determination through ultrasonic phased array scanning, calculating a repair heat input curve according to the defect type, executing pulse modulation cladding repair and adjusting parameters according to real-time temperature field and acoustic emission signals, automatic identification and accurate repair of welding defects can be realized, and the repair quality and efficiency are improved.

The invention provides a double-shaft-shoulder friction stir welding device with an adjustable shaft shoulder distance and a friction stir girth welding method of the double-shaft-shoulder friction stir welding device. The device comprises an adjustable double-shaft-shoulder stirring tool (1), a rotating main shaft (3), a withdrawing shaft (4), a clamp (5), a positioning platform (6) and a workbench (7), the adjustable double-shaft-shoulder stirring tool (1) is composed of an upper shaft shoulder, a lower shaft shoulder and an adjustable stirring needle, and the rotating main shaft (3) is adopted for controlling rotation of the adjustable double-shaft-shoulder stirring tool (1); and the withdrawing shaft (4) is adopted to adjust the length of the stirring needle. According to the adjustable stirring device, the adjustable stirring needle can freely stretch out and draw back through the withdrawing shaft (4), so that the distance between the shafts can be controlled, and the adjustable stirring device can adapt to welded workpieces (2) with different plate thicknesses. In addition, the press-in amount of the upper shaft shoulder and the lower shaft shoulder can be adjusted in the welding process, and welding forming is better facilitated. The adjustable double-shaft-shoulder stirring tool (1) is not only suitable for common welding seams, but also suitable for closed circumferential welding seams.

The invention discloses a back pressure controllable type automobile air conditioner compressor static scroll plate forging die which is characterized in that a forming upper die and an upper die core are connected in a hot pressing fit manner to form an upper die whole body; the lower die part comprises a forming female die, a female die sleeve, a female die prestress ring and a female die outer ring which are sequentially connected in a hot-press fit mode, and the problem of forging surface quality defects caused by unsmooth exhaust can be solved through a modular structure. The back pressure mechanism pushes the piston through the hydraulic system, back pressure is transmitted to the back pressure body through the push rod, the hydraulic system can adjust proper back pressure according to the size of the forge piece, and forge piece forming is more reliable. According to the invention, a hydraulic system is innovatively introduced, so that the back pressure has adjustable capability, the scroll plate forge piece has good contour in the axial profile, and the dimensional precision is obviously improved; and meanwhile, a modular design is adopted, so that each part is convenient to disassemble, assemble and replace, the maintenance cost is effectively reduced, and the improvement of the production efficiency and the optimization of the production cost are realized.

The application discloses a kind of roll bending unit hole type preparation method, and the application belongs to the field of rolling bending forming, comprising: the hole curve model of plate bending forming is constructed, wherein the hole curve model includes first section, last section and intermediate section between the first section and the last section, and the intermediate section is curved convex arc section;Based on the hole curve model, the three-dimensional model of the hole type of the roll bending unit is constructed, wherein the three-dimensional model includes a pair of the hole curve model, and the first section between the pair of the hole curve model, the last section and the intermediate section are all formed gap;Based on the three-dimensional model, the hole type of the roll bending unit is prepared.Compared with conventional roll bending forming hole type design, the application can improve the strength of plate bending angle, also can reduce the stress concentration of corner, reduce the risk of crack and fracture, improve the quality requirement of plate roll bending forming, improve production efficiency, reduce cost.

The invention discloses a preparation method of a magnesium alloy plate with a gradient twin structure, and belongs to the technical field of heterostructure material preparation. According to the method, firstly, a magnesium alloy plate serves as a base plate, magnesium alloy wires of the same mark are adopted for double-heat-source auxiliary heating stirring friction solid-phase additive manufacturing, and a deposition plate with crystal grains preferentially oriented in the thickness direction is obtained by regulating and controlling the heating temperature and deposition head process parameters; keeping the heating state of the substrate, performing heat source-assisted ultrasonic rolling on the deposited plate, and enabling crystal grains in the thickness direction of the plate to generate twinning deformation of different degrees by regulating and controlling rolling parameters; and finally, separating the substrate from the deposition plate to obtain the magnesium alloy plate with the gradient twin structure. Heterogeneous particles are not introduced, the material is pure, the technological process is short, the production efficiency is high, the cost is low, the prepared plate is small in grain, the gradient twin crystal structure penetrates through the thickness, the comprehensive performance is excellent, and the method is suitable for industrial production and can be applied to the fields of automobiles, aerospace, medical instruments and the like.

The invention relates to a hollow spline shaft yoke blank forging die and a forging process. The forging die comprises a lower die, an upper die and a driving device. A lower die cavity and a plurality of lower slideways are arranged at the top of the lower die; a die rod is slidably arranged in the lower slide way, and one end of the lower slide way communicates with the lower die cavity. The upper die is arranged above the lower die, an upper die cavity and upper slideways in one-to-one correspondence with the lower slideways are arranged at the bottom of the upper die, the upper die cavity is matched with the lower die cavity, and a driving device matched with the upper slideways and the lower slideways is used for driving the upper die to move downwards and driving the die rod to move towards the lower die cavity; by arranging the multiple die rods, flash-free forging of the complex spline shaft fork can be completed through one-time heating, preferably, the die rods correspond to the deep hole in the end of the shaft part of the shaft fork and the two through holes in the fork part of the shaft fork correspondingly, a shaft fork blank with the shaft part and the fork part at the same time can be completed, the deep hole is formed in the shaft part, and the through holes are formed in the fork part; the shape of the blank is closer to that of a finished product, the feeding weight is light, the forming quality is good, and the forming precision is high.

The utility model belongs to the field of additive manufacturing, and relates to a powder spreading device which comprises a supporting seat, a powder spreading roller assembly, a vibration generating mechanism and a driving device. The driving device is arranged on the supporting seat and is connected with the powder spreading roller group; the driving device drives the powder spreading roller assembly to work; and the vibration generating mechanism is arranged on the powder spreading roller assembly. The utility model provides the powder spreading device capable of effectively improving the powder spreading density.

The invention provides a collaborative optimization method for a magnetic-thermal composite field assisted laser cladding process. According to the method, a magnetic-thermal composite field-assisted laser cladding device is designed based on an energy field-assisted laser cladding process principle and is used for improving the structure and performance of a coating; the method comprises the following steps: generating a quadratic polynomial regression model on the basis of an RSM method, magnetic-thermal composite field assisted laser cladding process parameters and nickel-based composite coating quality evaluation indexes, performing multi-target optimization on the coating quality evaluation indexes on the basis of the quadratic polynomial regression model and an IMOGWO algorithm, determining a magnetic-thermal composite field assisted laser cladding target process parameter combination, and determining the quality of the nickel-based composite coating. And score calculation is carried out on the target process parameter combination based on an EWM-TOPSIS method to obtain a comprehensive evaluation sequence of the target process parameter combination, so that collaborative optimization of the magnetic-thermal composite field assisted laser cladding process is realized, and the performance optimization efficiency and quality of the nickel-based composite coating are improved.

The present application belongs to the field of plastic forming of metal thin-walled components, and relates to a precise forming method of a thin-walled component with built-in reinforcing blocks. The present application cooperatively uses pre-forming and final forming processes, first performs hot forming to complete the manufacturing of preformed rib cells, and then performs SPF / DB process to complete the manufacturing of the final component. The existence of the pre-formed rib cells improves the stability of the reinforcing block fixation, improves the consistency of the welding rate and quality of the diffusion bonding between the reinforcing block and the skin, suppresses the final sagging and shrinkage defects of the component by controlling the protruding height size of the placed reinforcing block, and improves the overall forming quality of the component.

The present application relates to the technical field of laser welding, and particularly relates to a laser welding platform with multi-angle protection and annular magnetic field assistance, which comprises a workbench, a laser welding head, an upper protective gas device, an annular magnetic field device and a cooling device. The present application has compact structure design, convenient welding operation, and is especially suitable for good weld forming quality when high-power laser generator is used for laser welding. The upper protective gas device, the annular magnetic field device and the cooling device are integrated on the laser welding head, the overall structure design is more compact, and each component will move with the movement of the laser welding head, and is not easy to be affected by various welding conditions. The annular magnetic field is additionally arranged outside the laser welding head, a more uniform magnetic field is generated during welding, the molten pool is more uniformly stressed during weld forming, the weld collapse is reduced when the power output is larger, the molten pool is not easy to produce pores when subjected to external force under the action of the magnetic field force, and the weld forming quality of laser welding is improved.

This invention discloses a method for refining primary silicon in Al-Si alloys through synergistic modification with nano-ceramics based on laser additive manufacturing. The method involves uniformly mixing Al-Si alloy powder with TiB2 and Al2O3 nano-ceramics using a ball mill under inert gas protection to obtain a ceramic-reinforced nano-Al-Si alloy composite powder. This nano-ceramic-modified Al-Si alloy powder is then melted and solidified layer by layer using a laser powder bed melting and forming equipment to create the desired target part. In this method, during the solidification of the nano-ceramic-reinforced Al-Si alloy melt, Al2O3 nanoparticles, due to their similarity to the Si crystal structure and the existence of a good interfacial coherence relationship, act as heterogeneous nucleation sites for primary silicon, increasing the nucleation rate and refining the size of primary silicon. TiB2 nanoparticles, distributed at the solid-liquid interface, can to a certain extent prevent the diffusion and aggregation of Si atoms into Si-Si atom clusters, thereby inhibiting the growth of the primary silicon phase, promoting the regularization of the primary silicon morphology and refining its size, and effectively reducing matrix grain size, significantly improving the mechanical properties of the Al-Si alloy.

This invention discloses a side-mounted 3D printing system and method for thin metal sheets. The system includes a cutting laser, a printing laser, a gas circulation component, a feeding component, a printing platform, and a printing control component. The feeding component is specifically designed to include an upper feeding roller and a lower receiving roller, both arranged vertically. The thin metal sheet is tightly wound between these two rollers and fed and retrieved along a vertical path. The cutting laser and the printing laser are positioned on the same side of the metal sheet printing surface, while the printing platform is located on the other side. By arranging the feeding and receiving rollers vertically, the thin metal sheet is continuously transported and retrieved vertically. This invention utilizes gravity to effectively prevent molten metal droplets generated by laser melting from splashing onto the workpiece surface during printing, thereby significantly improving print quality, and is particularly suitable for printing large-format (ultra-meter) workpieces.

The invention discloses upsetting heating electrodes based on shape heat dynamic matching, a plate forging tool and a process, and belongs to the field of metal plastic forming equipment. According to the deformation requirements of different areas of a forming material, the plate forging tool comprising a plurality of upsetting heating electrodes is adopted; when a second part of an electrode core rod in the upsetting heating electrode stretches into an electrode shell, a reset spring device is compressed, an electric contact part makes contact with an annular resistor, a conductive column, the annular resistor, the electric contact part and the electrode core rod are electrically connected, and when the second part of the electrode core rod continues to stretch into the electrode shell, the electric contact part is separated from the annular resistor; and the electric connection between the electrode core rod and the conductive column is disconnected. The heating temperature of the upsetting heating electrode is actively matched with the geometrical morphology of the blank in the blank forming process, the temperature is high when the deformation amount is large, the temperature is low when the deformation amount is small, and accurate temperature control in the blank forming process is achieved. The length of each annular resistor of the plate forging tool is matched with the target shape of the part, the part does not need to be completely heated, and energy consumption is reduced.

The invention relates to the technical field of steel plate processing, and discloses a petroleum pipeline thick-wall steel plate pre-bending and edge rolling all-in-one machine which comprises a machine base, a supporting edge rolling mechanism installed in the machine base and a steel plate sample arranged above the machine base and further comprises two side frames symmetrically arranged on the two sides of the machine base. A synchronous pre-bending mechanism is arranged at the top of the side frame; synchronous and symmetrical pre-bending of the two ends of a steel plate is achieved through the synchronous pre-bending mechanisms arranged on the two sides of the machine base, a lifting autorotation roller and a pitched roof rotating roller which are installed in a trapezoid frame can apply accurate and adjustable bending force to the two ends of the steel plate at the same time, and procedure interruption and reference deviation caused by turning around and secondary clamping in the traditional technology are eliminated; it is ensured that the curvature radius of pre-bending at the two ends is highly consistent with the forming quality, the overall roundness and straightness of the barrel are remarkably improved, and a fundamental guarantee is provided for subsequent efficient edge rolling and high-quality girth welding.

The invention discloses movable assembly type high-degree-of-freedom dieless double-sided incremental forming equipment and method. The equipment comprises two groups of forming units, namely a first forming unit A and a second forming unit B, the first forming unit A and the second forming unit B can be assembled together during use and can be detached after use, and the first forming unit A and the second forming unit B are both of a foldable storage structure; the foldable industrial mechanical arm forming units capable of cooperatively working are arranged on the two sides of the vertically-fixed to-be-machined plate, synchronous or cooperative incremental forming of the front face and the back face of the plate is achieved, the forming precision is improved, springback is reduced, the thickness distribution of the plate is improved, and therefore the forming requirements of complex curved surfaces and high-performance plates are met. The double-sided forming equipment is designed to be of a detachable and assemblable modular structure, so that the equipment can be packaged in a storage state in the transportation and deployment process and can be quickly unfolded and spliced on the use site, and the maneuverability and the application flexibility of the equipment are remarkably improved.

The application relates to an amorphous spray package adjusting device, and relates to the technical field of amorphous strip production equipment, which comprises a rack and a movable frame movably arranged on the rack, a transverse driving mechanism is arranged on the movable frame and used for driving the movable frame to move transversely; an amorphous spray package body is detachably and movably arranged on the movable frame, and a lower end of the amorphous spray package body is provided with an amorphous spray head; a horizontal rotating mechanism and a vertical rotating mechanism are arranged between the movable frame and the amorphous spray package body and are used for driving the amorphous spray package body to rotate in a horizontal plane and a vertical plane respectively; and a lifting mechanism is further arranged to enable the amorphous spray package body to move in a vertical direction. The device can flexibly adjust the amorphous spray package body in multiple degrees of freedom directions, the spraying angle and position of the amorphous spray head can be timely corrected in the production process, so that the spraying precision and stability are improved, the thickness uniformity and surface quality of the amorphous strip are improved, and the reliability of the production process is improved.

The present application relates to the technical fields of intelligent manufacturing and automation control, and discloses a kind of intelligent regulation and control methods for the wall thickness of crucible spin pressing in piezoelectric single crystal growth, comprising: collecting data in the process of spin pressing, and obtaining stable acquisition sequence by preprocessing;Stable acquisition sequence is fused by adaptive weighted fusion and Kalman filtering, and the fused wall thickness is obtained by fusing the laser thickness value and the wall thickness value and compensation value respectively mapped by the spin pressing force, torque and eccentricity;Calculate the comprehensive deviation vector of wall thickness deviation, local wall thickness thinning rate, eccentricity deviation and roundness error;Based on the comprehensive deviation vector and the wall thickness deviation, the fuzzy adaptive PID output correction value and the hierarchical threshold comparison are executed in parallel to generate pass jump and trajectory reconstruction instructions, and the closed-loop cooperative control is formed by issuing the numerical control spin pressing system;After each pass is completed, the wall thickness distribution is obtained by fusion and solution, and the deviation is determined to add compensation pass or trajectory reconstruction, and iteration is carried out until the requirements are met.The present application realizes the online intelligent closed-loop regulation and control of the wall thickness of crucible spin pressing.

The utility model provides a kind of double-arrow-shaped metamaterial corrugated strip multi-step semi-automated forming platform, the utility model places initial rectangular corrugated strip in forming area first, through the folding mechanism and pressure block propulsion mechanism with spatial phase difference distribution characteristics, combined with multistage progressive extrusion path planning strategy, realize double-arrow-shaped metamaterial corrugated strip layer-by-layer cumulative forming under the dynamic load exerted by electric control system, and the forming angle and precision of material after forming are guaranteed by fine adjustment sliding table and screw clamp, after forming is completed, pressure maintaining treatment is carried out by the pressure maintaining force of electric cylinder, material springback is reduced, and finally high-precision double-arrow-shaped metamaterial corrugated strip is obtained.

The invention relates to the technical field of shape follow-up runner manufacturing, and discloses an additive and subtractive composite shape follow-up runner integrated manufacturing system and method.The system comprises a laser additive manufacturing module, a laser additive manufacturing module and a laser additive manufacturing module, and the laser additive manufacturing module is used for cladding metal powder through laser beams to form a shape follow-up runner structure layer by layer; the physical field auxiliary module is integrated in a processing area of the laser additive manufacturing module; the subtractive machining module is used for cutting the inner surface and the characteristic structure of the formed runner after the additive manufacturing is completed; the information acquisition module is used for acquiring the molten pool peak temperature at the laser beam acting point in the manufacturing process in real time and tracking and measuring the dynamic cooling rate of the solidification front edge of the molten pool; the intelligent control module adjusts the laser beam output power according to the peak temperature of the molten pool; and controlling on-off of an ultrasonic wave generating device and a pulsed magnetic field generating device in the physical field auxiliary module according to the dynamic cooling rate. According to the invention, the forming quality and the manufacturing reliability of the conformal runner are improved.

The utility model discloses a vibration powder supply device (17) and additive manufacturing equipment (1). The vibration powder supply device (17) comprises a powder feeding part (20) and a powder discharging part (30), the powder blocking part (21) is arranged in the powder feeding part (20), and a powder feeding space (210) for controlling the height of powder flow is formed between the powder blocking part (21) and the powder feeding part (20); the at least one vibration part (22) is arranged at one end of the powder feeding part (20), and the vibration part (22) is used for providing vibration force acting on the powder feeding part (20), so that the powder feeding part (20) uniformly conveys powder flow. The powder conveying device can realize continuous and stable conveying of powder materials so as to achieve a better conveying effect.

The invention provides a method for improving impact toughness of electric arc additive manufacturing titanium alloy, and belongs to the technical field of additive manufacturing. The method comprises the steps that a pretreated forming base material is placed on a cooling device in a gas protection device, when the oxygen content in the gas protection device is smaller than 1000 ppm, the electric arc additive manufacturing process of the titanium alloy is started, meanwhile, the cooling device is started to cool the forming base material, the cooling device is placed in the gas protection device, and the cooling device is started to cool the forming base material. According to the method, the cooling device can cool the environment gas in the gas protection device while cooling the base material, printing can be conducted at a low temperature in the whole additive manufacturing process, and compared with an existing additive printing process in which the environment oxygen content needs to be controlled to be 100 ppm or below, due to the fact that the environment is low in the printing process, the printing efficiency is greatly improved. And the temperature of the formed base material is low all the time, so that the printing quality of the titanium alloy can be guaranteed even if printing is conducted under the high oxygen content, and the titanium alloy is not prone to being oxidized.