CN219336511U - Welding production line for middle groove - Google Patents

Abstract

The utility model discloses a welding production line of a middle groove, which comprises a middle plate assembling tool, a feeding tool, a middle plate and bottom plate welding tool, a bottom plate assembling tool, a bottom plate drawing welding tool, a bent plate rail seat assembling tool, a bent plate rail seat welding tool, a carrier and a first suspension machine which are sequentially arranged adjacently; the middle plate assembly tool and the feeding tool are transmitted through the first suspension machine, and the middle groove is transmitted through the carrier between the feeding tool, the middle plate bottom plate welding tool, the bottom plate assembly tool, the bottom plate drawing welding tool, the bent plate rail seat assembly tool and the bent plate rail seat welding tool. The welding production line can realize the integrated production from assembly to welding forming of the middle groove, and realize automatic conveying of the middle groove between tools, so that time cost and labor cost are saved, the welding efficiency and qualification rate of the middle groove are improved, and the production cost of the middle groove is further reduced.

Description

Welding production line for middle groove

Technical Field

The utility model belongs to the technical field of middle groove welding, and particularly relates to a welding production line of a middle groove.

Background

In the existing middle groove welding process, a single station mode is mostly adopted, and the middle groove is transported between stations by manpower, so that the labor is wasted, the transportation and welding efficiency is low, and the production cost is high due to the fact that the mass and the volume of the middle groove are large; in addition, due to the adoption of manual operation, the uniformity and consistency of the welding seams of the ledge at the two sides of the middle groove are poor, and a large potential quality safety hazard exists.

Disclosure of Invention

In view of the above, the present utility model discloses a welding line for a middle tank to overcome or at least partially solve the above-mentioned problems.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a welding production line of a middle groove, which comprises a middle plate assembling tool, a feeding tool, a middle plate and bottom plate welding tool, a bottom plate assembling tool, a bottom plate drawing welding tool, a bent plate rail seat assembling tool, a bent plate rail seat welding tool, a carrier and a first suspension machine which are sequentially and adjacently arranged; the middle plate assembling tool is used for assembling and aligning the middle plate of the middle groove and the side plate of the middle groove during welding; the feeding tool is used for feeding during middle groove assembly; the middle plate bottom plate welding tool is used for middle plate bottoming of the middle groove, middle plate welding of the middle groove and welding of welding lines of the bottom plate of the middle groove; the bottom plate assembly fixture is used for combining and positioning and aligning the bottom plates of the middle grooves; the bottom plate drawing and welding tool is used for drawing and welding the welding line of the bottom plate of the middle part; the bent plate rail seat assembly fixture is used for combining the middle groove and the bent plate rail seat and positioning and aligning; the bent plate rail seat welding tool is used for welding the middle groove and the bent plate rail seat;

the middle plate assembly tool and the feeding tool are connected through the first suspension machine, the feeding tool, the middle plate bottom plate welding tool, the bottom plate assembly tool, the bottom plate drawing welding tool, the bent plate rail seat assembly tool and the bent plate rail seat welding tool are connected through the carrier to convey the middle groove.

Further, the middle plate assembling tool comprises a base, and a middle plate assembling part sleeve and a side plate assembling part sleeve which are arranged on the base;

the middle plate assembly part sleeve comprises a middle plate positioning component and a middle plate jacking component which are respectively used for positioning and jacking the middle plate;

the side plate assembly part sleeve comprises a side plate positioning assembly which is used for positioning and fixing the side plates in the length direction and the width direction respectively.

Further, the feeding tool comprises a working platform;

the working platform is provided with a transformation sliding table capable of moving along the X-axis direction, the transformation sliding table is provided with a middle plate clamping block positioning assembly capable of moving along the Y-axis direction, and the middle plate clamping block positioning assembly is used for positioning the middle plate clamping block.

Further, the middle plate and bottom plate welding tool comprises a first automatic positioner, a first dust collecting device, a ground rail and a first welding robot;

the ground rail is arranged on one side of the first automatic position changing machine, the first welding robot is arranged on the ground rail, and the first dust collecting device is arranged above the first automatic position changing machine.

Further, the bottom plate assembly tooling comprises a second automatic positioner, a first insulation box and a second suspension machine;

the first heat preservation box is arranged on one side of the second automatic position changing machine, and the second suspension machine is arranged above the first heat preservation box and the second automatic position changing machine.

Further, the bottom plate digging and welding tool comprises a third automatic positioner, a welding machine and a second dust collecting device;

the welding machine is arranged on one side of the third automatic position changing machine, and the second dust collecting device is arranged above the third automatic position changing machine.

Further, the bent plate rail seat assembly tooling comprises a transfer platform, a preheating platform, a second insulation box, a third suspension machine and a preheating device;

the transfer platform and the second incubator are respectively arranged on two sides of the preheating platform, the third suspension machine is arranged above the transfer platform, the preheating platform and the second incubator, and the preheating device is arranged above the preheating platform.

Further, the bent plate rail seat welding tool comprises a top rail, a second welding robot and a fourth automatic positioner;

the first welding robot is arranged on the first welding rail, and can move in the X-axis, Y-axis and Z-axis directions on the first welding robot.

Further, the welding production line further comprises a rail on which the carrier can move;

the feeding tool is arranged at one end of the track, and the middle plate bottom plate welding tool, the bottom plate assembling tool, the bottom plate drawing welding tool, the bent plate rail seat assembling tool and the bent plate rail seat welding tool are arranged at one side of the track.

Further, the welding production line also comprises a first workpiece caching tool, a second workpiece caching tool, a preheating furnace and a blanking tool;

the first workpiece buffering tool is adjacent to the middle plate assembling tool, the second workpiece buffering tool is arranged between the bottom plate assembling tool and the bottom plate drawing and welding tool, the preheating furnace is arranged on one side of the middle plate assembling tool, and the blanking tool is arranged on the other end of the rail.

The utility model has the advantages and beneficial effects that:

in the welding production line, by arranging the middle plate assembly tooling, the feeding tooling, the middle plate bottom plate welding tooling, the bottom plate assembly tooling, the bottom plate drawing welding tooling, the bent plate rail seat assembly tooling and the bent plate rail seat welding tooling, arranging the first suspension machine for conveying the middle groove between the middle plate assembly tooling and the feeding tooling, and arranging the carrier for conveying the middle groove between the feeding tooling, the middle plate bottom plate welding tooling, the bottom plate assembly tooling, the bottom plate drawing welding tooling, the bent plate rail seat assembly tooling and the bent plate rail seat welding tooling, the integrated production of the middle groove from assembly to welding forming is realized, the automatic conveying of the middle groove between the tools is realized, the time cost and the labor cost are saved, the welding efficiency and the qualification rate of the middle groove are improved, and the production cost of the middle groove is further reduced.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 is a top view of a welding line for a middle tank in one embodiment of the utility model;

FIG. 2 is a perspective view of a middle plate assembly tooling in an embodiment of the utility model;

FIG. 3 is a perspective view of a loading tool according to an embodiment of the present utility model;

FIG. 4 is a perspective view of a middle plate and bottom plate welding tool according to an embodiment of the present utility model;

FIG. 5 is a perspective view of a floor plunge welding tool according to one embodiment of the present utility model;

FIG. 6 is a perspective view of a tooling assembly for a bent plate rail seat in one embodiment of the utility model;

fig. 7 is a perspective view of a truck according to an embodiment of the present utility model.

In the figure: 1. assembling a middle plate; 1-1, a base; 1-2, assembling the middle plate assembly part sleeve; 1-3, assembling the side plates; 2. feeding tools; 2-1, a working platform; 2-2, a mould changing sliding table; 2-3, a middle plate clamping block positioning assembly; 3. welding a middle plate bottom plate; 3-1, a first automatic positioner; 3-2, a first dust collecting device; 3-3, ground rails; 3-4, a first welding robot; 4. assembling a tool by a bottom plate; 5. a bottom plate drawing and welding tool; 5-1, a third automatic positioner; 5-2, welding machine; 5-3, a second dust collecting device; 6. assembling a fixture for the bent plate rail seat; 6-1, a transfer platform; 6-2, preheating the platform; 6-3, a second insulation box; 6-4, a third suspension machine; 6-5, preheating device; 7. welding fixture for bent plate rail seat; 8. a carrier; 8-1, a mother car; 8-2, sub-vehicles; 8-3, a quick positioning component; 9. a track; 10. a first workpiece caching tool; 11. a second workpiece caching tool; 12. a preheating furnace; 13. blanking tools; 14. and (5) a manual passage.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to specific embodiments of the present utility model and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The following describes in detail the technical solutions provided by the embodiments of the present utility model with reference to the accompanying drawings.

In one embodiment of the utility model, a welding production line of a middle groove is disclosed, as shown in fig. 1, and comprises a middle plate assembling tool 1, a feeding tool 2, a middle plate and bottom plate welding tool 3, a bottom plate assembling tool 4, a bottom plate drawing and welding tool 5, a bending plate rail seat assembling tool 6, a bending plate rail seat welding tool 7, a carrier 8 and a first suspension machine which are sequentially and adjacently arranged. The first suspension machine may be a gantry crane.

Specifically, middle plate assembly frock 1 and material loading frock 2 are passed through first suspension machine and are conveyed the middle part groove between, and material loading frock 2, medium plate bottom plate welding frock 3, bottom plate assembly frock 4, bottom plate draw welding frock 5, bent plate rail seat assembly frock 6 and bent plate rail seat welding frock 7 are passed through the carrier and are conveyed the middle part groove.

The middle plate assembly tool 1 is used for assembling and aligning a middle plate of the middle groove and a side plate of the middle groove during welding; the feeding tool 2 is used for feeding during middle groove assembly; the middle plate bottom plate welding tool 3 is used for performing middle plate bottoming of the middle groove, middle plate welding of the middle groove and welding of welding seams of the bottom plate of the middle groove; the bottom plate assembling tool 4 is used for assembling and positioning and aligning the bottom plates of the middle grooves; the bottom plate drawing and welding tool 5 is used for drawing and welding the welding line of the bottom plate of the middle part; the bent plate rail seat assembly tool 6 is used for combining the middle groove and the bent plate rail seat and positioning and aligning; the bent plate rail seat welding tool 7 is used for welding the middle groove and the bent plate rail seat.

In summary, in the welding production line of this embodiment, through setting up medium plate assembly frock, the material loading frock, medium plate bottom plate welding frock, the bottom plate assembly frock, bottom plate draw welding frock, bent plate rail seat assembly frock and bent plate rail seat welding frock, and set up the first suspension machine that is used for conveying the middle part groove between medium plate assembly frock and the material loading frock, and set up the carrier that is used for conveying the middle part groove between material loading frock, medium plate bottom plate welding frock, bottom plate draw welding frock, bent plate rail seat assembly frock and bent plate rail seat welding frock, not only can realize the integrated production of middle part groove from the equipment to welding shaping, but also realized the automatic conveying of middle part groove between each frock, time cost and cost of labor have been saved, the efficiency and the qualification rate of middle part groove welding have been improved, and then the manufacturing cost of middle part groove has been reduced; in addition, the welding production line can meet the processing requirements of middle grooves of different models, and is high in flexibility degree.

In this embodiment, specific structures of the middle plate assembly tooling 1, the feeding tooling 2, the middle plate bottom plate welding tooling 3, the bottom plate assembly tooling 4, the bottom plate drawing welding tooling 5, the bent plate rail seat assembly tooling 6, the bent plate rail seat welding tooling 7, the carrier 8 and the first suspension machine are not limited, and any tooling structure capable of realizing the functions is within the protection scope of the utility model. On the premise of meeting the requirements of the utility model, the number and the positions of the equipment can be flexibly set according to the requirements of welding processing of the middle groove.

Further, as shown in fig. 2, the middle plate assembling tool comprises a base 1-1, a middle plate assembling part sleeve 1-2 and a side plate assembling part sleeve 1-3, wherein the middle plate assembling part sleeve 1-2 and the side plate assembling part sleeve 1-3 are arranged on the base 1-1; the middle plate assembly part sleeve 1-2 comprises a middle plate positioning component and a middle plate jacking component which are respectively used for positioning and jacking the middle plate; the side plate pairing part sleeve 1-3 comprises a side plate positioning assembly for positioning and fixing the side plates in the length direction and the width direction respectively. The middle plate assembling tool can improve automation and accuracy of middle plate and side plate assembling and positioning alignment, is applicable to middle grooves of various types, is high in assembling efficiency, and further improves automation level of middle groove assembling. And, the specific structure of the middle plate assembly tooling 1 can be seen from the general middle groove assembly tooling disclosed in the utility model CN 202020872155.5.

In addition, as shown in fig. 3, the feeding tool 2 comprises a working platform 2-1. The working platform 2-1 is a split type platform and comprises two split platforms, and a certain distance is reserved between the two split platforms.

And be equipped with on the work platform 2-1 and follow X axis direction movable's the slip table that changes type 2-2, the quantity of changing type 2-2 is two, and set up respectively on two sub-platforms, and two slip tables that change type 2-2 can follow X axis direction and remove in opposite directions or move mutually, all are equipped with on each slip table that changes type 2-2 and can follow the medium plate clamp splice locating component 2-3 of Y axis direction removal, and medium plate clamp splice locating component 2-3 is used for the location of medium plate clamp splice. Specifically, be equipped with the locating pin that corresponds with the locating hole on the medium plate clamp splice locating component 2-3, through trading type slip table 2-2 and remove in X axis direction to and medium plate clamp splice locating component 2-3 makes the locating pin just in time insert in the locating hole on the medium plate clamp splice, realizes the fixed of medium plate clamp splice, and then this material loading frock can be applicable to the automatic fixation of the middle part groove of different models. It is to be noted that, the middle plate clamp splice is the accompanying frock of middle part groove, has fixed the middle plate clamp splice, just also can realize the fixed of middle part groove.

In this embodiment, as shown in fig. 4, the middle plate bottom plate welding fixture includes a first automatic positioner 3-1, a first dust collecting device 3-2, a ground rail 3-3, and a first welding robot 3-4.

The first automatic position changing machine 3-1 is used for automatically overturning the middle groove, so that position changing of middle grooves with different sizes can be realized, and the specific structure of the first automatic position changing machine can be seen from the automatic position changing machine disclosed in the utility model CN202221197336.8, and the automatic position changing machine has the advantages of high control precision, simplicity in operation, safety, high efficiency and high automation degree. Specifically, the ground rail 3-3 is arranged at one side of the first automatic position changing machine 3-1, the first welding robot 3-4 is arranged on the ground rail 3-3 and can move on the ground rail 3-3, and the automatic welding of different parts of the middle plate and the bottom plate of the middle groove can be realized by matching with the position changing function of the first automatic position changing machine 3-1, and the welding is more accurate; the first dust collecting device 3-2 is arranged above the first automatic position changer 3-1 and is used for preventing particles generated by welding from splashing and ensuring the cleanliness of a welding production line.

In addition, the bottom plate assembly fixture comprises a second automatic positioner, a first heat insulation box and a second suspension machine. The second suspension machine can be a single-beam suspension, and the structure of the second automatic position changing machine is consistent with that of the first automatic position changing machine.

Specifically, the first incubator sets up in one side of second automatic position changing machine, and first incubator is used for the heat preservation of middle part groove bottom plate to be stored, and the second suspender sets up in the top of first incubator and second automatic position changing machine, and the second suspender is used for handling the bottom plate in the first incubator to second automatic position changing machine department, carries out the group with the middle part groove on the second automatic position changing machine and fixes a position.

And, as shown in fig. 5, the floor scoop welding tool includes a third automatic positioner 5-1, a welder 5-2, and a second dust collecting device 5-3.

The welding machine 5-2 is arranged at one side of the third automatic position changing machine 5-1, of course, in order to improve welding efficiency, the number of the welding machines 5-2 can be two, the welding machines are respectively arranged at two sides of the third automatic position changing machine 5-1, specific structures of the third automatic position changing machine 5-1 and the welding machines 5-2 can be referred to the position changing machine and the welding machines disclosed in the utility model CN202221255289.8, and the automatic welding of the bottom plate of the middle groove can be realized through the cooperation of the welding machines 5-2 and the third automatic position changing machine 5-1, so that the welding with high efficiency and high quality is realized. The second dust collecting device 5-3 is arranged above the third automatic position changer 5-1 and is used for preventing particles generated by welding from splashing and ensuring the cleanliness of a welding production line.

In this embodiment, as shown in fig. 6, the bent plate rail seat assembly fixture includes a transfer platform 6-1, a preheating platform 6-2, a second incubator 6-3, a third suspension machine 6-4, and a preheating device 6-5. Wherein, the transfer platform 6-1 is in butt joint with the carrier and is used for realizing the transfer of the middle groove; the second incubator 6-3 is used for the thermal insulation storage of the middle groove rail seat.

Specifically, the transfer platform 6-1 and the second incubator 6-3 are respectively arranged at two sides of the preheating platform 6-2, the third suspension machine 6-4 is arranged above the transfer platform 6-1, the preheating platform 6-2 and the second incubator 6-3, and the preheating device 6-5 is arranged above the preheating platform 6-2.

When the bent plate rail seat assembly works on the fixture, the middle groove on the transfer platform 6-1 is hung on the preheating platform 6-2 through the third hanging machine 6-4, then the rail seats in the bent plate and the second heat insulation box 6-3 are lifted on the preheating platform 6-2, the bent plate rail seat assembly and the middle groove are assembled and positioned, and finally the assembled and positioned middle groove is subjected to heat supplementing through the preheating device 6-5, so that the temperature of a workpiece meets the technological requirements in the welding process of the bent plate rail seat.

In addition, the bent plate rail seat welding tool comprises a top rail, a second welding robot and a fourth automatic positioner; the structure of the fourth automatic position changing machine is consistent with that of the first automatic position changing machine, so that the position of the middle groove can be changed, and the middle groove can be swung out to have a proper welding posture.

Specifically, the top rail is arranged on one side of the fourth automatic position changing machine, the second welding robot is arranged on the top rail and can move in the directions of the X axis, the Y axis and the Z axis, so that the welding range of the second welding robot can be increased, and the welding requirement of the bent plate rail seat can be met.

Further, as shown in FIG. 7, the carrier comprises a mother car 8-1, a child car 8-2 and a quick positioning assembly 8-3, wherein the child car 8-2 is arranged on the mother car 8-1, and the quick positioning assembly 8-3 is arranged on the child car 8-2 and is used for clamping the middle groove. The specific structure of the carrier can be seen from the automatic carrying and feeding trolley for the middle groove disclosed in the utility model CN201822053048.5, the carrier in the embodiment can meet the automatic production requirement by matching with an automatic positioner and a welding robot, the quick and accurate positioning is realized, and the carrier is suitable for carrying and feeding of middle grooves of different models; and, can drive sub-car 8-2 through female car 8-1 and remove simultaneously, sub-car 8-2 still can remove alone, realizes the removal of two vertical directions, and female car 8-1 can remove on the general commodity circulation line like this, and sub-car 8-2 can remove on the branch commodity circulation line, and then reaches automatic production demand.

In this embodiment, as shown in fig. 1, the welding production line further includes a rail 9, and the carrier 8 can move on the rail 9, so that the middle groove can be quickly and accurately transported.

Specifically, the material loading frock 2 sets up in the one end of track 9, and medium plate bottom plate welding frock 3, bottom plate group are to frock 4, bottom plate draw welding frock 5, bent plate rail seat group is to frock 6 and bent plate rail seat welding frock 7 setting in one side of track 9, just so can realize the work piece conveying between each frock through a track 9 to make welding production line's structure compacter, the overall arrangement is more reasonable, and then is favorable to improving welding production line's production efficiency. In addition, the welding production line is further provided with a manual passage 14 parallel to the rail 9, so that the middle plate bottom plate welding tool 3, the bottom plate assembling tool 4, the bottom plate drawing welding tool 5, the bent plate rail seat assembling tool 6 and the bent plate rail seat welding tool 7 are positioned between the rail 9 and the manual passage 14, and the manual passage 14 can reach the position of any tool, thereby being convenient for maintenance and overhaul of each tool.

Further, as shown in fig. 1, the welding production line further comprises a first workpiece buffer tooling 10, a second workpiece buffer tooling 11, a preheating furnace 12 and a blanking tooling 13; the first workpiece buffer tooling 10 and the second workpiece buffer tooling 11 are used for buffering the middle groove, the blanking tooling 13 is used for completing blanking work of the middle groove, and the structures of the first workpiece buffer tooling 10, the second workpiece buffer tooling 11 and the blanking tooling 13 are identical to those of the feeding tooling 2 and are not repeated herein; the preheating furnace 12 is used for preheating the middle tank part.

Specifically, the first workpiece buffer tooling 10 is arranged adjacent to the middle plate assembly tooling 1, the second workpiece buffer tooling 11 is arranged between the bottom plate assembly tooling 4 and the bottom plate drawing and welding tooling 5, the preheating furnace 12 is arranged on one side of the middle plate assembly tooling 1, and the blanking tooling 13 is arranged on the other end of the track 9, so that the structure of the welding production line is more compact, and the production line is convenient to flow and automatically produce. Of course, the number and the setting positions of the first workpiece buffer tooling 10, the second workpiece buffer tooling 11 and the preheating furnace 12 can also be adjusted according to the needs.

The foregoing is merely a specific embodiment of the utility model and other modifications and variations can be made by those skilled in the art in light of the above teachings. It is to be understood by persons skilled in the art that the foregoing detailed description is provided for the purpose of illustrating the utility model more fully, and that the scope of the utility model is defined by the appended claims.

Claims (10)

1. The welding production line of the middle groove is characterized by comprising a middle plate assembling tool, a feeding tool, a middle plate bottom plate welding tool, a bottom plate assembling tool, a bottom plate drawing welding tool, a bent plate rail seat assembling tool, a bent plate rail seat welding tool, a carrier and a first suspension machine which are sequentially arranged adjacently; the middle plate assembling tool is used for assembling and aligning the middle plate of the middle groove and the side plate of the middle groove during welding; the feeding tool is used for feeding during middle groove assembly; the middle plate bottom plate welding tool is used for middle plate bottoming of the middle groove, middle plate welding of the middle groove and welding of welding lines of the bottom plate of the middle groove; the bottom plate assembly fixture is used for combining and positioning and aligning the bottom plates of the middle grooves; the bottom plate drawing and welding tool is used for drawing and welding the welding line of the bottom plate of the middle part; the bent plate rail seat assembly fixture is used for combining the middle groove and the bent plate rail seat and positioning and aligning; the bent plate rail seat welding tool is used for welding the middle groove and the bent plate rail seat;

the middle plate assembly tool and the feeding tool are connected through the first suspension machine, the feeding tool, the middle plate bottom plate welding tool, the bottom plate assembly tool, the bottom plate drawing welding tool, the bent plate rail seat assembly tool and the bent plate rail seat welding tool are connected through the carrier to convey the middle groove.

2. The welding line for a middle groove according to claim 1, wherein the middle plate assembling fixture comprises a base, and a middle plate assembling part sleeve and a side plate assembling part sleeve which are arranged on the base;

the middle plate assembly part sleeve comprises a middle plate positioning component and a middle plate jacking component which are respectively used for positioning and jacking the middle plate;

the side plate assembly part sleeve comprises a side plate positioning assembly which is used for positioning and fixing the side plates in the length direction and the width direction respectively.

3. The welding line for a middle tank of claim 1, wherein the loading fixture comprises a work platform;

the working platform is provided with a transformation sliding table capable of moving along the X-axis direction, the transformation sliding table is provided with a middle plate clamping block positioning assembly capable of moving along the Y-axis direction, and the middle plate clamping block positioning assembly is used for positioning the middle plate clamping block.

4. The welding line for a middle tank according to claim 1, wherein the middle plate and bottom plate welding fixture comprises a first automatic positioner, a first dust collecting device, a ground rail and a first welding robot;

the ground rail is arranged on one side of the first automatic position changing machine, the first welding robot is arranged on the ground rail, and the first dust collecting device is arranged above the first automatic position changing machine.

5. The welding production line of the middle groove according to claim 1, wherein the bottom plate assembly fixture comprises a second automatic positioner, a first incubator and a second suspension;

the first heat preservation box is arranged on one side of the second automatic position changing machine, and the second suspension machine is arranged above the first heat preservation box and the second automatic position changing machine.

6. The mid-tank welding line of claim 1, wherein the floor skiving tooling includes a third automatic positioner, a welder, and a second dust collector;

the welding machine is arranged on one side of the third automatic position changing machine, and the second dust collecting device is arranged above the third automatic position changing machine.

7. The welding production line of the middle groove according to claim 1, wherein the bent plate rail seat assembly fixture comprises a transfer platform, a preheating platform, a second incubator, a third suspension machine and a preheating device;

the transfer platform and the second incubator are respectively arranged on two sides of the preheating platform, the third suspension machine is arranged above the transfer platform, the preheating platform and the second incubator, and the preheating device is arranged above the preheating platform.

8. The welding line for a middle tank of claim 1, wherein the bent plate rail seat welding fixture comprises a top rail, a second welding robot and a fourth automatic positioner;

the first welding robot is arranged on the first welding rail, and can move in the X-axis, Y-axis and Z-axis directions on the first welding robot.

9. The welding line for a middle tank according to any one of claims 1 to 8, characterized in that it further comprises a rail on which the truck is movable;

the feeding tool is arranged at one end of the track, and the middle plate bottom plate welding tool, the bottom plate assembling tool, the bottom plate drawing welding tool, the bent plate rail seat assembling tool and the bent plate rail seat welding tool are arranged at one side of the track.

10. The welding line for a middle tank according to claim 9, further comprising a first work piece buffering tool, a second work piece buffering tool, a preheating furnace and a blanking tool;

the first workpiece buffering tool is adjacent to the middle plate assembling tool, the second workpiece buffering tool is arranged between the bottom plate assembling tool and the bottom plate drawing and welding tool, the preheating furnace is arranged on one side of the middle plate assembling tool, and the blanking tool is arranged on the other end of the rail.

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