A zoned gas protection additive equipment

Abstract

The present invention discloses a partitioned gas shielded additive equipment, which has a cover body and an air cooling and constant humidity device. The cover body is provided with a partition I, which divides the cover body into a relatively independent working area and equipment area; the air cooling and constant humidity device includes an indoor unit and an outdoor unit; the printing device body and the indoor unit are placed in the working area of ​​the cover body, the power box and the wire feeder are located in the equipment area of ​​the cover body, and the wire feeder feeds the welding wire into the printing device body through the welding wire through hole; the partition I is also provided with a line through hole for line connection between the printing device body and the power box; the outdoor unit is located outside the cover body, and the cover body is provided with a pipeline through hole for pipeline connection between the indoor unit and the outdoor unit. Through functional zoning, the gas shielded additive equipment is provided with a relatively stable working condition of temperature and humidity, so as to achieve the purpose of improving the processing accuracy and manufacturing efficiency of the workpiece, while reducing energy consumption, and facilitating the control of quality and curing process.

Description

Technical Field

[0001] The present invention relates to the field of additive manufacturing, and in particular to a zoned gas-shielded additive manufacturing device. Background Art

[0002] Additive manufacturing is a general term for a series of processes. Its principle is to transform digital 3D model files into 3D objects layer by layer through stacking. However, the high heat input in additive manufacturing causes the workpiece to heat up quickly. In particular, if the input heat of the surfacing process is not removed in time and is transferred to the parts of the printing equipment, the parts will work at high temperatures for a long time, affecting their life and processing accuracy.

[0003] To ensure product quality, a relatively stable temperature level must be maintained when printing the workpiece. Therefore, most existing production processes use a natural cooling method of stopping and waiting. However, air is a poor conductor of heat. When a high-temperature object is placed in a static air environment, the air on the surface of the object will show obvious temperature stratification. The air layer in direct contact with the object will absorb the heat of the workpiece and heat up, while the outer air cannot obtain heat due to the poor thermal conductivity of the air itself. Ultimately, a small layer of air on the surface of the workpiece stops conducting heat at the same temperature as the workpiece, and heat is only dissipated through thermal radiation. The cooling effect is extremely poor and the cooling efficiency is extremely low, which affects the processing and manufacturing efficiency, thereby limiting the widespread application and development of additive manufacturing technology.

[0004] If water cooling is used, although the cooling efficiency can be improved to a certain extent, some materials have poor oxidation resistance and are not suitable for direct water cooling, or uncontrollable direct water cooling may cause the temperature to drop too quickly, resulting in product defects.

[0005] In particular, the gas-protected additive process has certain requirements for ambient temperature and humidity. It needs to be carried out under a stable working condition to ensure product quality. Too high temperature affects printing efficiency and product quality, and a sharp drop in temperature too quickly causes product defects. When the humidity is higher than the material forming humidity requirement, the internal pores of the formed product will increase significantly compared to a low humidity environment. Since the ambient temperature and humidity are closely related to factors such as region and season, and metal forming is more sensitive to these factors, the process technologies in additive manufacturing are all defined as the results of research under a single working condition. In actual applications, if the working condition factors change significantly, it will cause the process plan to be adjusted significantly or even fail. Therefore, technicians in this field urgently need to develop a steady-state working condition to ensure the quality and accuracy of workpiece processing, and to efficiently and quickly assist the workpiece in completing processing. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention proposes a partitioned gas shielded additive equipment, which provides the gas shielded additive equipment with relatively stable working conditions of temperature and humidity through functional zoning, so as to improve the processing accuracy and manufacturing efficiency of the workpiece, reduce energy consumption, and facilitate the control of quality and curing process.

[0007] The technical solution adopted in the present invention is:

[0008] A partitioned gas shielded additive device comprises a printing device body, a power supply box and a wire feeder; the printing device body comprises a frame, a working platform for printing is arranged on the frame, guide rails are arranged on the left and right sides of the working platform, and a gantry equipped with a printing gun head is arranged on the guide rails; the device also comprises a cover body and an air cooling and constant humidity device, a partition plate I is arranged in the cover body, and the cover body is divided into a relatively independent working area and equipment area; the air cooling and constant humidity device comprises an indoor unit for conveying cold air and dehumidifying, and an outdoor unit for cooling;

[0009] The printing device body and the indoor unit are placed in the working area of ​​the cover, the power box and the wire feeder are located in the equipment area of ​​the cover, the partition I is provided with a welding wire through hole for the welding wire to pass through, and the wire feeder feeds the welding wire into the printing device body through the welding wire through hole; the partition I is also provided with a line through hole for connecting the line between the printing device body and the power box;

[0010] The outdoor unit is located outside the cover body, and the cover body is provided with a pipeline through hole for pipeline communication between the indoor unit and the outdoor unit.

[0011] The partitioned gas-shielded additive equipment is further provided with a circulating air cooling device in the cover body, and the circulating air cooling device includes an air supply box, a return air box and a circulating fan; the air supply box is mounted on the frame and is located above the rear side of the working platform, the air supply port of the air supply box faces the working platform, and cold air is blown toward the printing surface of the printed workpiece on the working platform through the air supply port; the return air box is arranged at the front side of the working platform and is arranged opposite to the air supply box, and the return air port of the return air box faces the working platform; the circulating fan is arranged in the equipment area of ​​the cover body, and the air supply box and the return air box are respectively connected to the circulating fan through pipelines passing through the partition I.

[0012] In the partitioned gas-shielded additive equipment, the air supply port of the air supply box and the return air port of the return air box are both long strip openings; the length direction of the long strip opening of the air supply port is consistent with the length direction of the rear side end of the working platform; the length direction of the long strip opening of the return air port is consistent with the length direction of the front side end of the working platform.

[0013] The partitioned gas shielded additive equipment is provided with an inclined air supply guide plate on the air supply box wall opposite to the air supply port, and the air supply guide plate is inclined toward the direction of the working platform; the return air box is provided with an inclined return air guide plate on the box wall opposite to the return air port, and the return air guide plate is inclined toward the direction of the working platform.

[0014] The partitioned gas shielded additive equipment, wherein the cover is further provided with a circulating cooling system, wherein the circulating cooling system comprises a cooling circuit arranged inside the working platform, a water tank for containing coolant, and a cooling pipe connecting the cooling circuit and the water tank;

[0015] The water tank is arranged in the equipment area of ​​the cover body, and the cooling pipeline passes through the partition I and is connected with the cooling circuit.

[0016] The partitioned gas-shielded additive equipment, wherein the cooling circuit has a coolant flow channel that is distributed in a serpentine shape along the inner plane of the working platform; the coolant flow channel has a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are respectively arranged on the side wall of the working platform and connected to the cooling pipe.

[0017] The partitioned gas shielded additive equipment, wherein the equipment area is divided into relatively independent first equipment area, second equipment area and third equipment area by partition II, the power box is located in the first equipment area, the wire feeder is located in the second equipment area, and the water tank is located in the third equipment area.

[0018] The partitioned gas shielded additive equipment has lifting assemblies on the left and right sides of the frame, and the working platform is installed on the frame through the lifting assemblies.

[0019] The partitioned gas shielded additive equipment, the lifting assembly includes a first lifting motor fixedly installed on the left side of the frame, a first lifting drive shaft connected to the output shaft of the first lifting motor, a first guide shaft matched with the first lifting drive shaft, and a second lifting motor fixedly installed on the right side of the frame, a second lifting drive shaft connected to the output shaft of the second lifting motor, and a second guide shaft matched with the second lifting drive shaft; the left end of the working platform is installed on the first lifting drive shaft and the first guide shaft, and the right end of the working platform is installed on the second lifting drive shaft and the second guide shaft.

[0020] The partitioned gas-shielded additive equipment also has a milling electric spindle on the gantry for automatic cutting.

[0021] The present invention has the following beneficial effects:

[0022] 1. The present invention designs a cover body to enclose the additive work area in a relatively closed area, and the area is equipped with air cooling and constant humidity equipment to stabilize the area within a certain temperature and humidity. The welding power supply, wire feeder, circulating fan and water tank to improve cooling efficiency, and auxiliary equipment that do not require cooling but need to be frequently operated in the additive equipment are installed in the equipment area of ​​the cover body, separated from the cooling area of ​​the additive printing work area, forming a non-cooling area, reducing energy consumption, and eliminating the influence of coolant in the auxiliary equipment on the humidity of the printing area.

[0023] 2. During the printing process, surface quality problems may occur and need to be polished and cut. In order to reduce the damage to the working conditions caused by manual operation of opening the door, a set of milling electric spindles is configured on the gantry to realize automatic cutting;

[0024] 3. In order to improve the cooling efficiency, a circulating air cooling device is configured in the printing area. By setting the air supply box above one side of the working platform and making the air supply port face the printing surface of the workpiece on the working platform, the cold air blown out by the air supply box can effectively disrupt the airflow on the surface of the workpiece, take away a layer of high-temperature air on the surface of the workpiece, replenish low-temperature air, and maintain heat exchange efficiency. The return air box set on the side of the working platform opposite to the air supply box achieves the purpose of recycling high-temperature air.

[0025] 4. The cooling circuit is coiled inside the work platform to cool the additive printing workbench, thereby indirectly cooling the printed workpiece and solving the problem of over-high temperature of the printing work platform. The coolant inside the work platform can take away the heat transferred from the workpiece to the work platform, accelerate the heat exchange between the workpiece and the workpiece, speed up the cooling of the workpiece, and also prevent the aging of the workpiece caused by long-term high temperature operation.

[0026] 5. A lifting work platform is adopted, which is lowered as the height of the workpiece printing surface increases. This can ensure that the workpiece printing surface is always in the same plane. The return air box fixedly installed on the front side of the work platform descends together with the work platform, so that the air flow or wind surface formed by the supply air box to the return air box always acts on the workpiece printing surface and forms convection with the workpiece printing surface, thereby accelerating the air cooling speed of the workpiece surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0028] Figure 1 It is a structural schematic diagram of a zoned gas shielded additive equipment of the present invention;

[0029] Figure 2 for Figure 1 A schematic diagram of the structure of the cover body shown;

[0030] Figure 3 for Figure 1 The schematic diagram of the structure of the gas protection additive equipment without the cover is shown;

[0031] Figure 4 for Figure 3 The rear view structural schematic diagram of the gas protection additive device without the cover is shown;

[0032] Figure 5 for Figure 1 The structural diagram of the main body of the printing device shown in part;

[0033] Figure 6 Figure 1 The structural schematic diagram of the working platform shown;

[0034] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure of the working platform shown.

[0035] Figure identification: 1-printing equipment body, 1.1-frame, 1.2-working platform, 1.3-guide rail, 1.4-print gun head, 1.5-gantry, 2-cover, 2.1-working area, 2.2-equipment area, 3-indoor unit, 4-circulating air cooling device, 4.1-air supply box, 4.2-return air box, 4.3-circulating fan, 5-circulating cooling system, 5.1-cooling circuit, 5.2-liquid inlet, 5.3-liquid outlet, 5.4-deep hole, 5.5-milling groove, 5.6-sealing, 5.7-water tank, 6-lifting assembly, 6.1-first lifting motor, 6.2-first lifting drive shaft, 6.3-first guide shaft, 7-wire feeder, 8-power box. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] like Figure 1-5A partitioned gas shielded additive device is shown, comprising a printing device body 1, a power box 8 and a wire feeder 7; the printing device body 1 comprises a frame 1.1, a working platform 1.2 for printing is arranged on the frame 1.1, guide rails 1.3 are arranged on the left and right sides of the working platform 1.2, and a gantry 1.5 equipped with a printing gun head 1.4 is erected on the guide rails 1.3.

[0038] like Figure 1 , 2 , 3, in order to ensure product quality and keep the workpiece at a relatively stable temperature during printing, a cover 2 and an air cooling and constant humidity device are added to the printing device body 1. The air cooling and constant humidity device includes an indoor unit 3 for delivering cold air and dehumidifying, and an outdoor unit for cooling; Figure 1-2 The housing 2 shown in the figure is provided with a partition I, which divides the housing 2 into a relatively independent working area 2.1 and an equipment area 2.2; the printing device body 1 and the indoor unit 3 are placed in the working area 2.1 of the housing 2, the power box and the wire feeder 7 are located in the equipment area 2.2 of the housing 2, the partition I is provided with a welding wire through hole for the welding wire to pass through, and the wire feeder feeds the welding wire into the printing device body 1 through the welding wire through hole; the partition I is also provided with a line through hole for line connection between the printing device body 1 and the power box; the outdoor unit is located outside the housing 2, and the housing 2 is provided with a pipeline through hole for pipeline connection between the indoor unit 3 and the outdoor unit. Through the partition setting of the housing 2, the printing device body 1 and the indoor unit 3 that need to be cooled are placed together, providing a relatively stable cooling environment for the printing device body 1 in the working area 2.1, and at the same time, the equipment that generates heat and does not need to be cooled is placed in the equipment area, such as the wire feeder, the power box, etc., which not only ensures the stability of the cooling environment, but also further saves energy and reduces consumption.

[0039] At the same time, in order to improve the cooling efficiency, a circulating air cooling device is also provided in the cover body, such as Figure 3 , 4, 5, the circulating air cooling device comprises an air supply box 4.1, a return air box 4.2 and a circulating fan 4.3; the air supply box 4.1 is mounted on the frame 1.1, and is located above the rear side of the working platform 1.2, the air supply port of the air supply box 4.1 faces the working platform 1.2, and the cold air is blown toward the printing surface of the printed workpiece on the working platform 1.2 through the air supply port; the return air box 4.2 is arranged at the front side of the working platform 1.2, and the return air box 4.2 is arranged opposite to the air supply box 4.1, and the return air port of the return air box 4.2 faces the working platform 1.2; there is a height difference between the air supply port and the return air port, so that the wind surface blowing from the air supply port to the working platform 1.2 is at an inclined angle with the printing surface of the workpiece, thereby disturbing the high-temperature air layer on the printing surface of the workpiece. The circulating fan 4.3 is arranged in the equipment area 2.2 of the cover body 2, and the air supply box 4.1 and the air return box 4.2 are connected to the circulating fan 4.3 through pipelines passing through the partition I. The circulating fan 4.3 provides continuous cold air for the air supply box 4.1, and the cold air passes through the air supply port of the air supply box 4.1 and is blown onto the surface of the printed workpiece, which plays a role in destroying the high-temperature air layer near the surface of the stationary printed workpiece, and improves the fluidity of the high-temperature air near the surface of the workpiece, so as to achieve the purpose of improving the heat dissipation efficiency of the workpiece surface. The return air box 4.2 is connected to the circulating fan 4.3 through a pipeline. The return air box 4.2 plays the role of circulating return air, sucking away the wind blowing over the surface of the workpiece to take away the hot air on the working platform 1.2, so as to achieve the effect of lowering the air temperature around the working platform 1.2. The return air box 4.2 is directly set on the working platform 1.2, and the air supply box 4.1 is located above one side of the working platform 1.2. After the cold air blows over the printing surface of the workpiece, it will flow downward toward the return air box 4.2 under the vacuum suction action of the return air box 4.2, thereby achieving the purpose of blowing the cold air over the entire outer surface of the workpiece and improving the overall heat dissipation effect of the workpiece.

[0040] As a preferred embodiment of the above scheme, the air supply port of the air supply box 4.1 and the return air port of the return air box 4.2 are both long strip openings; the length direction of the long strip opening of the air supply port is consistent with the length direction of the rear end of the working platform 1.2; the length direction of the long strip opening of the return air port is consistent with the length direction of the front end of the working platform 1.2. The air supply range of the air supply box 4.1 can be expanded, and the long strip opening helps to form an air curtain and improve the fluidity of the gas around the working platform 1.2. An inclined air supply guide plate is provided on the box wall opposite to the air supply port of the air supply box 4.1, and the air supply guide plate is inclined toward the direction of the working platform 1.2; an inclined return air guide plate is provided on the box wall opposite to the return air port of the return air box 4.2, and the return air guide plate is inclined toward the direction of the working platform 1.2.

[0041] like Figure 6 , 7In order to further improve the cooling efficiency, the housing 2 is further provided with a circulating cooling system 5, which includes a cooling circuit 5.1 disposed inside the working platform 1.2, a water tank 5.7 for containing coolant, and a cooling pipe connecting the cooling circuit 5.1 and the water tank 5.7; the water tank 5.7 is disposed in the equipment area 2.2 of the housing 2, and the cooling pipe passes through the partition I and is connected to the cooling circuit 5.1. Figure 7 The cooling circuit shown has a cooling liquid flow channel that is distributed in a serpentine shape along the inner plane of the working platform 1.2; the cooling liquid flow channel has an inlet 5.2 and an outlet 5.3, which are respectively arranged on the side wall of the working platform 1.2 and connected to the cooling pipe. The cooling liquid is injected into the cooling circuit 5.1 inside the working platform 1.2 from the outside through the cooling liquid pipe. The processing of the cooling circuit 5.1 is to drill N deep holes 5.4 in the inner part of the working platform 1.2 along its length direction or width direction in sequence and side by side as the cooling liquid flow channel, and mill grooves 5.5 alternately between the adjacent cooling liquid flow channels, respectively, for connecting the adjacent cooling liquid flow channels; specifically: the first end milling groove 5.5 between the first and second cooling liquid flow channels, the tail end milling groove 5.5 between the second and third cooling liquid flow channels, and so on, and the surface of the milled groove 5.5 is sealed and welded 5.6, so as to form the cooling liquid circuit 5.1. By introducing coolant into the work platform 1.2, the cooling of the work platform 1.2 can take away the heat conducted to the work platform 1.2 by the workpiece, preventing the workpiece from aging due to high temperature. At the same time, keeping the work platform 1.2 at a low temperature can accelerate the heat exchange between the workpiece and the workpiece, further speeding up the cooling speed of the workpiece.

[0042] As a preferred embodiment of the above scheme, the equipment area 2.2 is divided into relatively independent first equipment area, second equipment area and third equipment area by partition II, the power box 8 is located in the first equipment area, the wire feeder 7 is located in the second equipment area, and the water tank 5.7 is located in the third equipment area. The dry and wet equipment are further divided in the equipment area 2.2 to extend the service life of the equipment.

[0043] As a preferred embodiment of the above scheme, Figure 5The left and right sides of the frame 1.1 are provided with lifting components, and the working platform 1.2 is installed on the frame 1.1 through the lifting component 6, so that the working platform 1.2 is a liftable working platform. The lifting component 6 includes a first lifting motor 6.1 fixedly installed on the left side of the frame, a first lifting drive shaft 6.2 connected to the output shaft of the first lifting motor 6.1, a first guide shaft 6.3 matched with the first lifting drive shaft 6.2, and correspondingly, a second lifting motor fixedly installed on the right side of the frame 1.1, a second lifting drive shaft connected to the output shaft of the second lifting motor, and a second guide shaft matched with the second lifting drive shaft; the left end of the working platform 1.2 is installed on the first lifting drive shaft and the first guide shaft, and the right end of the working platform 1.2 is installed on the second lifting drive shaft and the second guide shaft. The working platform 1.2 acts on the lifting assembly 6 and is lowered as the height of the workpiece printing surface increases, which can ensure that the workpiece printing surface is always in the same plane. The return air box 4.2 fixedly installed on the front side end of the working platform 1.2 descends together with the working platform 1.2, so that the airflow or wind surface formed by the supply air box 4.1 to the return air box 4.2 always acts on the workpiece printing surface and forms convection with the workpiece printing surface, thereby accelerating the air cooling speed of the workpiece surface.

[0044] As a preferred embodiment of the above scheme, the gantry 1.5 is also equipped with a milling electric spindle for automatic cutting. Surface quality problems may occur during the printing process and require grinding and cutting. In order to reduce the damage to the printing condition caused by manual operation of opening the cover 2, a set of milling electric spindles is configured on the gantry 1.5 to achieve automatic cutting.

[0045] The present invention provides a partitioned gas-shielded additive equipment. Through the above structure, functional partitioning is carried out to provide a steady-state working condition (temperature, humidity) for the gas-shielded additive printing equipment. After reducing the ambient temperature of the additive manufacturing environment, the cooling efficiency of the workpiece is further improved. The stable working condition provides a basis for controlling quality and curing process.

[0046] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0047] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0048] In addition, the terms "first", "second", "element I", "element II" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "element I", "element II" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A partitioned gas shielded additive equipment, comprising a printing equipment body, a power box and a wire feeder; the printing equipment body has a frame, a working platform for printing is arranged on the frame, guide rails are arranged on the left and right sides of the working platform, and a gantry with a printing gun head is arranged on the guide rails; characterized in that: It also has a housing and an air cooling and constant humidity device. The housing is provided with a partition I to divide the housing into a relatively independent working area and equipment area. The air cooling and constant humidity device includes an indoor unit for conveying cold air and dehumidifying, and an outdoor unit for cooling. The printing device body and the indoor unit are placed in the working area of ​​the cover, the power box and the wire feeder are located in the equipment area of ​​the cover, the partition I is provided with a welding wire through hole for the welding wire to pass through, and the wire feeder feeds the welding wire into the printing device body through the welding wire through hole; the partition I is also provided with a line through hole for connecting the line between the printing device body and the power box; The outdoor unit is located outside the cover, and the cover is provided with a pipeline through hole for connecting the indoor unit with the outdoor unit through the pipeline; The cover body is also provided with a circulating air cooling device, which includes an air supply box, a return air box and a circulating fan; the air supply box is mounted on the frame and is located above the rear side of the working platform, the air supply port of the air supply box faces the working platform, and the cold air is blown toward the printing surface of the printed workpiece on the working platform through the air supply port; the return air box is arranged at the front side of the working platform and is arranged opposite to the air supply box, and the return air port of the return air box faces the working platform; the circulating fan is arranged in the equipment area of ​​the cover body, and the air supply box and the return air box are respectively connected to the circulating fan through pipelines passing through the partition I; The housing is also provided with a circulating cooling system, which includes a cooling circuit arranged inside the working platform, a water tank for containing coolant, and a cooling pipe connecting the cooling circuit and the water tank; The water tank is arranged in the equipment area of ​​the cover body, and the cooling pipeline passes through the partition plate I and is connected to the cooling circuit; The cooling circuit has a cooling liquid flow channel that is distributed in a serpentine shape along the inner plane of the working platform; the cooling liquid flow channel has a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are respectively arranged on the side wall of the working platform and connected to the cooling pipeline; The left and right sides of the frame are provided with lifting components, and the working platform is installed on the frame through the lifting components; The lifting assembly includes a first lifting motor fixedly installed on the left side of the frame, a first lifting drive shaft connected to the output shaft of the first lifting motor, a first guide shaft matched with the first lifting drive shaft, and a second lifting motor fixedly installed on the right side of the frame, a second lifting drive shaft connected to the output shaft of the second lifting motor, and a second guide shaft matched with the second lifting drive shaft; the left end of the working platform is installed on the first lifting drive shaft and the first guide shaft, and the right end of the working platform is installed on the second lifting drive shaft and the second guide shaft.

2. A zoned gas shielded additive equipment as claimed in claim 1, characterized in that: The air supply port of the air supply box and the return air port of the return air box are both long strip openings; the length direction of the long strip opening of the air supply port is consistent with the length direction of the rear side end of the working platform; the length direction of the long strip opening of the return air port is consistent with the length direction of the front side end of the working platform.

3. A zoned gas shielded additive equipment as claimed in claim 1, characterized in that: An inclined air supply guide plate is provided on the wall of the air supply box opposite to the air supply port, and the air supply guide plate is inclined toward the direction of the working platform; an inclined return air guide plate is provided on the wall of the return air box opposite to the return air port, and the return air guide plate is inclined toward the direction of the working platform.

4. A zoned gas shielded additive equipment as claimed in claim 1, characterized in that: The equipment area is divided into relatively independent first, second and third equipment areas by partition II. The power box is located in the first equipment area, the wire feeder is located in the second equipment area, and the water tank is located in the third equipment area.

5. A zoned gas shielded additive equipment as claimed in claim 1, characterized in that: The gantry is also equipped with a milling electric spindle for automatic cutting.

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