Body welding device and welding method of electric track vehicle

Abstract

The present invention belongs to the technical field of automatic welding equipment, and discloses a body welding device and a welding method of an electric track vehicle, wherein the welding device comprises: a first welding fixture, comprising a frame, a power member driving the frame to rise and fall, and the four sides of the frame are respectively and sequentially provided with a first welding station, a second welding station, a third welding station and a fourth welding station; a second welding fixture, comprising a translation seat, a rotating seat arranged on the translation seat, the rotating seat is provided with a mounting arm, the rotating seat is connected to the middle part of the mounting arm, and the two ends of the mounting arm are respectively provided with a left welding station and a right welding station. The body welding device and the welding method of an electric track vehicle of the present invention can reduce its own manufacturing cost and improve welding efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of welding equipment, and in particular to a body welding device and a welding method of an electric track vehicle. Background Art

[0002] With the development of technology, new energy vehicles have been accepted by consumers, and their market share is getting higher and higher. At the same time, there are more and more new energy vehicle models.

[0003] Most new energy vehicles are electric vehicles. The number of their models is increasing day by day, and the types of vehicle bodies are also growing exponentially. The trend of small batches and diversification is very obvious.

[0004] When producing automobile bodies, larger automobile factories will usually set up a main welding line and multiple auxiliary welding lines. Both the main welding line and the auxiliary welding lines use assembly line welding methods, that is, one component is selected as a reference part, and other accessories are gradually welded together with the standard part to produce the car body.

[0005] For smaller automobile factories or those that only produce a small number of automobiles, a special welding tool will be set up with various installation positions. When in use, almost all parts of the car body are arranged in each installation position, and then the parts are welded together. Later, according to market feedback, it will be considered whether to switch to an assembly line welding production method to meet production capacity needs.

[0006] However, the demand for electric track vehicles is medium, so the assembly line production method will bring higher cost pressure. Although customized welding tooling takes up less capital, the structure of the welding tooling is extremely complex. To complete the welding, it is completely dependent on the welder's superb welding skills. Moreover, the welding quality and welding consistency are difficult to guarantee. At the same time, the production efficiency is extremely low. Summary of the invention

[0007] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a body welding device for an electric track vehicle, which can reduce its own manufacturing cost and improve welding efficiency.

[0008] The present invention also provides a welding method for the body welding device applied to the electric track vehicle.

[0009] According to a first aspect of the present invention, a body welding device for an electric track vehicle comprises:

[0010] The first welding tool comprises a frame and a power member for driving the frame to rise and fall, wherein the four sides of the frame are respectively provided with a first welding station, a second welding station, a third welding station and a fourth welding station;

[0011] A second welding tool comprises a translation seat and a rotating seat arranged on the translation seat, wherein the rotating seat is provided with a mounting arm, the rotating seat is connected to the middle part of the mounting arm, and a left welding station and a right welding station are respectively arranged at two ends of the mounting arm;

[0012] When the frame is raised, the translation seat moves, so that one of the left welding station and the right welding station moves to the area surrounded by the first welding station, the second welding station, the third welding station and the fourth welding station, and the other of the left welding station and the right welding station is located outside the frame;

[0013] When the frame descends, the first welding station, the second welding station, the third welding station, the fourth welding station and the left welding station or the right welding station cooperate to form a vehicle body welding fixture.

[0014] The body welding device of the electric track vehicle according to the embodiment of the present invention has at least the following beneficial effects:

[0015] The present invention sets a frame so that the four sides of the frame have the first welding station, the second welding station, the third welding station and the fourth welding station, thereby facilitating the fixing of accessories around the vehicle body for welding.

[0016] The first welding station, the second welding station, the third welding station, and the fourth welding station do not have spatial intersections, and can operate simultaneously without affecting each other, thereby shortening the work cycle of welding the vehicle body and improving production efficiency.

[0017] The present invention sets a second welding tool, which includes a translation seat and a rotating seat arranged on the translation seat, wherein the rotating seat is provided with a mounting arm, and the rotating seat is connected to the middle part of the mounting arm, and a left welding station and a right welding station are respectively arranged at both ends of the mounting arm. Therefore, when the accessories around the vehicle body are placed at the first welding station, the second welding station, the third welding station, and the fourth welding station, the accessories inside the vehicle body can be placed at the left welding station or the right welding station, thereby avoiding the operation of fixing the accessories inside the vehicle body within the frame, reducing operation interference, and at the same time, allowing the operations of each part to be carried out synchronously, shortening the working cycle of welding the vehicle body, improving welding output, and improving production efficiency.

[0018] At the same time, since the frame can be raised and lowered, one of the left welding station and the right welding station can be moved to the area surrounded by the first welding station, the second welding station, the third welding station and the fourth welding station, so that the relative positions of the accessories inside the vehicle body and the accessories on the periphery are accurate, and then, the various accessories of the vehicle body can be welded together with high quality and high precision, thereby improving the quality of the vehicle body.

[0019] When performing overall welding of a vehicle body, the present invention can also simultaneously perform welding preparation work for the next vehicle body at the other of the left welding station and the right welding station, and can fix a portion of the internal accessories of the next vehicle body or even weld a portion of it, so as to overcome the problem that the welding work of the accessories inside the vehicle body is more complex and time-consuming, and reasonably set the welding sequence, further shorten the working cycle of welding the vehicle body, improve welding output, and improve production efficiency.

[0020] The present invention also provides a welding method for a body welding device applied to an electric track vehicle, which has the above-mentioned beneficial effects.

[0021] According to the body welding device of the electric track vehicle in the first aspect of the present invention, the frame has two opposite short sides and two opposite long sides, the welding device includes a frame, one long side of the frame is rotatably connected to the frame, and hydraulic cylinders connected to the frame are arranged at both ends of the other long side of the frame, and the hydraulic cylinders are used to drive the frame to swing and rise and fall.

[0022] According to the body welding device of the electric track vehicle of the first aspect of the present invention, at least one of the first welding station, the second welding station, the third welding station and the fourth welding station includes a mounting frame, the mounting frame has an upper mounting surface and a lower mounting surface, the upper mounting surface is provided with a first clamping assembly, the lower mounting surface is provided with a second clamping assembly, the first clamping assembly is used to clamp parts of one type of vehicle body, and the second clamping assembly is used to clamp parts of another type of vehicle body, one of the mounting frame and the frame is provided with a rotating shaft, and the other of the mounting frame and the frame is provided with a center hole for accommodating the rotating shaft, the rotating shaft and the center hole cooperate to realize the rotation of the mounting frame so that the first clamping assembly and the second clamping assembly are alternately facing upward.

[0023] According to the body welding device of the electric track vehicle in the first aspect of the present invention, the rotating shaft and the center hole can move along the axial direction of the rotating shaft, one of the mounting frame and the frame is provided with two pins, the rotating shaft is provided between the two pins, and the other of the mounting frame and the frame is provided with two sockets, and the sockets cooperate with the pins to position the mounting frame.

[0024] According to the body welding device of the electric track vehicle in the first aspect of the present invention, the frame is provided with a cylinder for pulling and pushing the mounting frame, the push rod of the cylinder is provided with a T-shaped driving end, and the mounting frame is provided with a T-shaped through groove cooperating with the T-shaped driving end.

[0025] According to the body welding device of the electric track vehicle in the first aspect of the present invention, the first clamping assembly and the second clamping assembly each include at least one backing mold, at least one clamping member, and an electric member that drives the clamping member to move close to the backing mold, the electric member is connected to an electric connector, the frame is provided with a docking member that docks with the electric connector, the electric connector is fixed to the mounting frame, and the electric connector and the docking member are plugged in along the axial direction of the rotating shaft.

[0026] According to the body welding device of the electric field vehicle in the first aspect of the present invention, the translation seat moves along the width direction of the frame, one of the ends of the frame and the mounting arm is provided with a positioning hole, and the other of the ends of the frame and the mounting arm is provided with a positioning pin matching the positioning hole, and the positioning hole and the positioning pin are plugged in along the moving direction of the translation seat to position the mounting arm.

[0027] According to the body welding device of the electric track vehicle in the first aspect of the present invention, the frame is provided with a step portion, the step portion has a first bottom surface and a first side surface, the first bottom surface is used to support the end of the mounting arm, a guide slope is provided on the side of the first bottom surface away from the first side surface, the first side surface is used to abut the end of the mounting arm to limit the position, and the first side surface is correspondingly provided with the positioning pin or the positioning hole.

[0028] The body welding method of an electric track vehicle according to the second aspect of the present invention is applied to the body welding device of the electric track vehicle, and the welding method comprises:

[0029] Step 1: fix the accessories of the vehicle body to the first welding station, the second welding station, the third welding station, the fourth welding station and the left welding station respectively, and weld the accessories on the left welding station together;

[0030] Step 2: lift the frame and rotate the rotating seat so that the left welding station is located in a direction close to the frame, and then move the translation seat so that the left welding station is located in an area surrounded by the first welding station, the second welding station, the third welding station and the fourth welding station;

[0031] Step three, lower the frame, and then weld the accessories on the first welding station, the second welding station, the third welding station, the fourth welding station and the left welding station together. At the same time, add accessories to the right welding station and weld the accessories on the right welding station together.

[0032] The body welding method of an electric track vehicle according to the second aspect of the present invention is applied to the body welding device of the electric track vehicle;

[0033] The frame has two opposite short sides and two opposite long sides, the welding device includes a frame, one long side of the frame is rotatably connected to the frame, and hydraulic cylinders connected to the frame are arranged at both ends of the other long side of the frame, and the hydraulic cylinders are used to drive the frame to swing and rise and fall;

[0034] At least one of the first welding station, the second welding station, the third welding station and the fourth welding station comprises a mounting frame, the mounting frame has an upper mounting surface and a lower mounting surface, the upper mounting surface is provided with a first clamping assembly, the lower mounting surface is provided with a second clamping assembly, the first clamping assembly is used to clamp a part of a vehicle body, and the second clamping assembly is used to clamp a part of another vehicle body, one of the mounting frame and the frame is provided with a rotating shaft, the other of the mounting frame and the frame is provided with a center hole for accommodating the rotating shaft, the rotating shaft and the center hole cooperate to realize the rotation of the mounting frame, so that the first clamping assembly and the second clamping assembly are alternately facing upward;

[0035] The welding method comprises:

[0036] Step 1: rotate the first welding station, the second welding station, the third welding station, and the fourth welding station so that the clamping assembly of the corresponding vehicle model faces upward, and then fix the accessories of the vehicle body to the first welding station, the second welding station, the third welding station, the fourth welding station, and the left welding station respectively, and then weld the accessories on the left welding station together;

[0037] Step 2: lift the frame and rotate the rotating seat so that the left welding station is located in a direction close to the frame, and then move the translation seat so that the left welding station is located in an area surrounded by the first welding station, the second welding station, the third welding station and the fourth welding station;

[0038] Step three, lower the frame, and then weld the accessories on the first welding station, the second welding station, the third welding station, the fourth welding station and the left welding station together. At the same time, add accessories to the right welding station and weld the accessories on the right welding station together.

[0039] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions of 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 work.

[0041] Figure 1 It is a structural schematic diagram of a body welding device of an electric track vehicle according to an embodiment of the present invention;

[0042] Figure 2 for Figure 1 Schematic diagram of the structure of an alternative welding device;

[0043] Figure 3 for Figure 1 A schematic diagram of the structure of the first welding station in the welding device;

[0044] Figure 4 for Figure 1 A schematic structural diagram of a second welding tool in a welding device;

[0045] Figure 5 for Figure 1 Workflow diagram of the welding method of the welding device;

[0046] Figure 6 For the corresponding Figure 3 Workflow chart of the welding method of the welding device of the first welding station.

[0047] Reference numerals:

[0048] 100 - first welding fixture, 110 - frame, 111 - hydraulic cylinder, 120 - first welding station, 130 - second welding station, 140 - third welding station, 150 - fourth welding station, 160 - second welding fixture, 170 - translation seat, 180 - rotating seat, 190 - mounting arm, 200 - left welding station, 210 - right welding station, 220 - mounting frame, 230 - upper mounting surface, 240 - first clamping assembly, 250 - rotating shaft, 260 - latch, 270 - T-shaped through groove, 280 - backing mold, 290 - clamping member, 300 - electric member, 310 - positioning pin, 320 - step portion, 330 - first bottom surface, 340 - first side surface, 350 - guide inclined surface. DETAILED DESCRIPTION

[0049] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0050] In the description of the present invention, it is necessary to understand that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships 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 operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0051] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of first and second, this is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0052] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation, connection and connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] The following describes a body welding device and a welding method for an electric track vehicle according to an embodiment of the present invention in conjunction with the accompanying drawings.

[0054] Reference Figure 1 The present invention aims to provide an embodiment of a body welding device for an electric track vehicle, so as to adapt to the characteristics of the electric track vehicle, reduce its own manufacturing cost, and at the same time, improve the welding efficiency, so as to achieve the dual effects of low manufacturing cost and high manufacturing efficiency.

[0055] In this embodiment, the welding device mainly includes a first welding tool 100, a second welding tool 160 and a plurality of welding robots.

[0056] The welding robot is a multi-axis cantilever welding robot. Under the setting of the program, it can weld along a specific route with high welding consistency, which can ensure the quality of welding. Since this example does not involve the improvement of the welding robot, no diagram and detailed structural description are given, but this does not affect the understanding of the solution.

[0057] Among them, the first welding tool 100 occupies a large space and is also the main area for welding. Therefore, after welding is completed in the first welding tool 100, in theory, the body required for an electric track vehicle can be produced, and less additional welding work is required.

[0058] The first welding tool 100 includes a frame 110 and a power component for driving the frame 110 to rise and fall. The four sides of the frame 110 are respectively and sequentially provided with a first welding station 120, a second welding station 130, a third welding station 140 and a fourth welding station 150.

[0059] It is easy to understand that in this embodiment, by setting the frame 110, the four sides of the frame 110 have a first welding station 120, a second welding station 130, a third welding station 140, and a fourth welding station 150, thereby facilitating the fixing of accessories around the vehicle body for welding.

[0060] At the same time, the first welding station 120, the second welding station 130, the third welding station 140, and the fourth welding station 150 do not have spatial intersections, and can operate simultaneously without affecting each other, which can shorten the working cycle of welding the vehicle body and improve production efficiency.

[0061] In some specific embodiments of the present invention, four columns may be provided, and the four columns are slidably connected to the four corners of the frame 110. Motors and gears are provided at the four corners of the frame 110, and racks are provided on the columns. The motor drives the racks to drive the frame 110 to rise and fall as a whole.

[0062] In some specific embodiments of the present invention, four columns can be provided with screws, screw sleeves and motors. The motor is provided at the top of the column, the output end of the motor is connected to the screw, the bottom end of the screw is rotatably connected to the bottom of the column, and the screw sleeve is fixed to the four corners of the frame 110. Therefore, driven by the motor, the screw rotates, and the screw sleeve and the frame 110 rise and fall synchronously.

[0063] Reference Figure 2 In some specific embodiments of the present invention, the frame 110 can have two opposite short sides and two opposite long sides. The welding device includes a frame. One long side of the frame 110 is rotatably connected to the frame. Hydraulic cylinders 111 connected to the frame are provided at both ends of the other long side of the frame 110. The hydraulic cylinders 111 are used to drive the frame 110 to swing and rise and fall.

[0064] Since the height of the electric track vehicle is limited, a swing lifting method can be used to save the motor, screw, screw sleeve, gear and rack, and there is no need to consider the synchronization of the four corners of the frame 110 to avoid lifting jams.

[0065] It is easy to understand that in this embodiment, by swinging and lifting the frame 110 and lifting the long side of the frame 110, it is possible to avoid lifting the frame 110 as a whole, and there is less need to consider synchronization issues, thereby reducing the difficulty of operation and debugging.

[0066] Since the hydraulic cylinder 111 is one side of the lifting frame 110 and the center of gravity of the frame 110 is mostly located at its geometric center, the hydraulic cylinder 111 only needs to bear half of the weight of the frame 110 and the lifting resistance is small. Therefore, this embodiment can also reduce the lifting load and save energy.

[0067] At the same time, when the frame 110 rotates, one long side of the frame 110 is lifted, so the translation seat 170 of the second welding tool 160 can be moved into place by moving a short distance, which is beneficial to shorten the moving range of the translation seat 170 and reduce the occupied space of the entire welding device.

[0068] In some specific embodiments of the present invention, the top end of the hydraulic cylinder 111 can be connected to the frame 110, thereby reducing the space occupied on the top of the frame 110 and having less impact on the movement of the welding robot.

[0069] In some specific embodiments of the present invention, an electric push rod may be used to replace the hydraulic cylinder 111, so as to adapt to local conditions, reduce the types of power, and facilitate implementation.

[0070] In some specific embodiments of the present invention, the rotational connection between the hydraulic cylinder 111 and the frame 110 may be provided with a waist hole extending radially along the rotation axis of the frame 110, and the waist hole accommodates the shaft of the push rod connected to the hydraulic cylinder 111 to reduce the occurrence of jamming.

[0071] In some specific embodiments of the present invention, the frame 110 may be welded from a plurality of square tubes to reduce weight.

[0072] In some specific embodiments of the present invention, the frame 110 may include a plurality of I-beams to further reduce the manufacturing cost.

[0073] Due to space limitations, in a solution where the frame 110 is rotatable, the mounting bracket 220 of the second welding station 130 can be fixed, thereby reducing manufacturing costs. At the same time, there is no need to consider the problem of rotation interference.

[0074] The first welding station 120 , the second welding station 130 , the third welding station 140 , and the fourth welding station 150 have similar installation structures to simplify the design.

[0075] Reference Figure 3 Taking the first welding station 120 as an example, the first welding station 120 includes a mounting frame 220, and the mounting frame 220 has an upper mounting surface 230 and a lower mounting surface. The upper mounting surface 230 is provided with a first clamping assembly 240, and the lower mounting surface is provided with a second clamping assembly. The first clamping assembly 240 is used to clamp parts of one type of vehicle body, and the second clamping assembly is used to clamp parts of another type of vehicle body. One of the mounting frame 220 and the frame 110 is provided with a rotating shaft 250, and the other of the mounting frame 220 and the frame 110 is provided with a center hole for accommodating the rotating shaft 250. The rotating shaft 250 and the center hole cooperate to realize the rotation of the mounting frame 220, so that the first clamping assembly 240 and the second clamping assembly are alternately facing upward.

[0076] It is easy to understand that in this embodiment, the mounting frame 220 is provided so that the mounting frame 220 has an upper mounting surface 230 and a lower mounting surface. Therefore, the mounting frame 220 can be rotated so that different mounting surfaces face upward to meet the welding requirements of at least two vehicle models, avoid frequent disassembly, reduce switching workload, facilitate welding of vehicle bodies of different vehicle models, reduce the number of welding devices, and reduce manufacturing costs.

[0077] One of the mounting frame 220 and the frame 110 is provided with a rotating shaft 250, and the other of the mounting frame 220 and the frame 110 is provided with a center hole for accommodating the rotating shaft 250, which means that, for the mounting frame 220 and the frame 110, this embodiment does not exclude the solution of swapping the rotating shaft 250 and the center hole, and has the same effect.

[0078] In some specific embodiments of the present invention, the mounting frame 220 can be fixed to the rotating shaft 250 , the frame 110 is provided with a center hole, the center hole is a through hole, and a motor connected to the rotating shaft 250 is provided outside the frame 110 .

[0079] In some specific embodiments of the present invention, the rotating shaft 250 may be connected to a rocker arm, and the mounting bracket 220 may be rotated manually, thereby eliminating the need for a motor and reducing manufacturing costs.

[0080] In some specific embodiments of the present invention, the rotating shaft 250 and the center hole can be moved along the axial direction of the rotating shaft 250, two pins 260 are set in one of the mounting frame 220 and the frame 110, the rotating shaft 250 is set between the two pins 260, and two sockets are set in the other one of the mounting frame 220 and the frame 110, and the sockets and the pins 260 are used to position the mounting frame 220.

[0081] It is easy to understand that, in this embodiment, by providing two latches 260 and two insertion holes, the stability of the fixed mounting frame 220 can be improved, and at the same time, the installation accuracy of the mounting frame 220 can be improved.

[0082] The rotating shaft 250 and the center hole can move along the axial direction of the rotating shaft 250, which also facilitates the separation and re-insertion of the plug 260 from the socket, thereby simplifying the arrangement of the plug 260 and the socket.

[0083] In some specific embodiments of the present invention, the latch 260 can be made movable, that is, the latch 260 is pushed out of the socket without affecting the rotation of the shaft 250. However, if the latch 260 is movable, the positioning accuracy will be reduced, and it is necessary to consider the actual impact before trying again.

[0084] In some specific embodiments of the present invention, the frame 110 may be provided with a cylinder for pulling and pushing the mounting frame 220, the push rod of the cylinder may be provided with a T-shaped driving end, and the mounting frame 220 may be provided with a T-shaped through groove 270 cooperating with the T-shaped driving end.

[0085] It is easy to understand that in this embodiment, a T-shaped driving end and a T-shaped through-slot 270 are provided. Therefore, when the mounting frame 220 rotates, the T-shaped driving end and the T-shaped through-slot 270 can be separated and do not affect the rotation of the mounting frame 220. When the mounting frame 220 is rotated into place, the T-shaped driving end re-enters the T-shaped through-slot 270, and the power of the cylinder pulls the T-shaped driving end to fix the mounting frame 220 again.

[0086] In some specific embodiments of the present invention, the gap between the T-shaped through-slot 270 and the T-shaped driving end may be enlarged without affecting the rotation of the mounting bracket 220 .

[0087] In some specific embodiments of the present invention, the first clamping assembly 240 and the second clamping assembly can both include at least one supporting mold 280, at least one clamping member 290, and an electric member 300 that drives the clamping member 290 to move close to the supporting mold 280. The electric member 300 is connected to an electric connector, and the frame 110 is provided with a docking joint that docks with the electric connector. The electric connector is fixed to the mounting frame 220, and the electric connector and the docking joint are plugged in along the axial direction of the rotating shaft 250.

[0088] It is easy to understand that in this embodiment, the clamping assembly has a backing mold 280, a clamping member 290 and an electric member 300. Therefore, under electric drive, the clamping member 290 is close to the backing mold 280, and can clamp and fix the accessories of the vehicle body, so as to overcome the problem that most accessories are made by stamping and have large manufacturing errors, reduce the dimensional deviation of the vehicle body, and improve the final accuracy of the vehicle body.

[0089] At the same time, since the electrical connector and the docking connector are plugged in along the axial direction of the rotating shaft 250, after the mounting frame 220 is rotated into place, the mounting frame 220 is pushed toward one side of the frame 110, so that the electrical connector and the docking connector can be connected synchronously, reducing operations.

[0090] In some specific embodiments of the present invention, the electric component 300 may include a linear motor and a combination of a motor and a gear rack, etc., to meet practical application requirements.

[0091] In some specific embodiments of the present invention, the power for driving the clamping member 290 may be pneumatic or hydraulic, but it is necessary to consider the piping, or limit the rotation range of the mounting bracket 220, such as setting the rotation range to 180 degrees.

[0092] In view of the characteristics of the electric field vehicle, the mounting frames 220 of some of the first welding station 120, the second welding station 130, the third welding station 140 and the fourth welding station 150 can be fixedly connected to the frame 110 to simplify the structure and reduce the manufacturing cost.

[0093] Reference Figure 1 , Figure 2 and Figure 4 For the second welding fixture 160, the second welding fixture 160 includes a linear guide rail, a translation seat 170 that translates along the linear guide rail, and a rotating seat 180 arranged on the translation seat 170. The rotating seat 180 is provided with a mounting arm 190. The rotating seat 180 is connected to the middle part of the mounting arm 190. The left welding station 200 and the right welding station 210 are respectively arranged at both ends of the mounting arm 190.

[0094] When the frame 110 is raised, the translation seat 170 moves, so that one of the left welding station 200 and the right welding station 210 moves to the area surrounded by the first welding station 120, the second welding station 130, the third welding station 140 and the fourth welding station 150, and the other one of the left welding station 200 and the right welding station 210 is located outside the frame 110.

[0095] When the frame 110 descends, the first welding station 120 , the second welding station 130 , the third welding station 140 , the fourth welding station 150 and the left welding station 200 or the right welding station 210 cooperate to form a vehicle body welding fixture.

[0096] It is easy to understand that in this embodiment, the second welding fixture 160 is provided so that the second welding fixture 160 includes a translation seat 170 and a rotating seat 180 arranged on the translation seat 170, and the rotating seat 180 is provided with a mounting arm 190. The rotating seat 180 is connected to the middle part of the mounting arm 190, and the left welding station 200 and the right welding station 210 are respectively arranged at both ends of the mounting arm 190. Therefore, when the accessories around the vehicle body are placed on the first welding station 120, the second welding station 130, the third welding station 140, and the fourth welding station 150, the accessories inside the vehicle body can be placed on the left welding station 200 or the right welding station 210, so as to avoid the operation of fixing the accessories inside the vehicle body in the frame 110, reduce operation interference, and at the same time, make the operations of each part proceed synchronously, shorten the working cycle of welding the vehicle body, improve welding output, and improve production efficiency.

[0097] At the same time, since the frame 110 can be raised and lowered, one of the left welding station 200 and the right welding station 210 can be moved to the area surrounded by the first welding station 120, the second welding station 130, the third welding station 140 and the fourth welding station 150, so that the relative positions of the accessories inside the vehicle body and the accessories on the periphery are accurate, and then, the various accessories of the vehicle body are welded together with high quality and high precision, thereby improving the quality of the vehicle body.

[0098] When performing overall welding of the vehicle body, the present invention can also simultaneously perform welding preparation work for the next vehicle body at the other of the left welding station 200 and the right welding station 210, and a portion of the internal accessories of the next vehicle body can be fixed or even welded, so as to overcome the problem that the welding work of the accessories inside the vehicle body is more content, more complicated, and more time-consuming, and the welding sequence can be reasonably set to further shorten the working cycle of welding the vehicle body, improve welding output, and improve production efficiency.

[0099] It can be determined that the left welding station 200 and the right welding station 210 can be installed with the same clamping assembly or pressing assembly to fix two sets of identical body accessories. However, this embodiment does not exclude the left welding station 200 from fixing one body accessory and the right welding station 210 from fixing another body accessory to meet different application needs.

[0100] In some specific embodiments of the present invention, the number of the second welding jigs 160 can be two sets, so that the accessories inside the vehicle body are divided into two left and right parts, and two second welding jigs 160 are respectively provided at one welding station to enter the frame 110, which is suitable for larger electric field vehicles, or to meet more complex welding designs. For example, when the accessories inside the vehicle body are concentrated in one welding station, there may be obstructions during robot welding, and a strict welding sequence needs to be set, or, after welding a part, additional accessories need to be installed and welded again.

[0101] In some specific embodiments of the present invention, a motor, a gear driven by the motor, and a rack of meshing gears can be arranged between the translation seat 170 and the linear guide rail to achieve a large range of translation of the translation seat 170 without increasing the occupied space due to the power structure.

[0102] In some specific embodiments of the present invention, the combination of the motor and the screw sleeve can drive the translation seat 170 to move, but it is necessary to consider shielding the screw sleeve to prevent welding slag from mixing in and affecting the transmission.

[0103] In some specific embodiments of the present invention, the translation seat 170 can be moved along the width direction of the frame 110, one of the ends of the frame and the mounting arm 190 is provided with a positioning hole, and the other end of the frame and the mounting arm 190 is provided with a positioning pin 310 matching the positioning hole, and the positioning hole and the positioning pin 310 are plugged in along the moving direction of the translation seat 170 to position the mounting arm 190.

[0104] It is easy to understand that, by setting the positioning hole and the positioning pin 310, the free end of the mounting arm 190 can be limited, the deviation caused by accidental rotation touch can be reduced, and the relative position of the left welding station 200 or the right welding station 210 and the first welding station 120, the second welding station 130, the third welding station 140 and the fourth welding station 150 can be ensured to be accurate, thereby reducing errors and improving the dimensional accuracy of the vehicle body.

[0105] In some specific embodiments of the present invention, the frame can be provided with a step portion 320, the step portion 320 has a first bottom surface 330 and a first side surface 340, the first bottom surface 330 is used to support the end of the mounting arm 190, a guide slope 350 is provided on the side of the first bottom surface 330 away from the first side surface 340, the first side surface 340 is used to abut the end of the mounting arm 190 to limit the position, and a positioning pin 310 or a positioning hole is correspondingly provided on the first side surface 340.

[0106] It is easy to understand that in this embodiment, the step portion 320 is provided so that the step portion 320 has a first bottom surface 330, and the first bottom surface 330 is connected to the guide slope 350. Therefore, the mounting arm 190 abuts against the guide slope 350, so that the mounting arm 190 smoothly enters the first bottom surface 330, and it is prevented that the end of the mounting arm 190 tilts downward due to gravity, making it difficult to insert the locating pin 310 into the locating hole. At the same time, the mounting arm 190 is supported to prevent the mounting arm 190 from tilting downward and affecting the dimensional accuracy in the height direction.

[0107] The mounting arm 190 abuts against the first side surface 340 and also constrains the axial direction of the positioning pin 310, thereby improving the dimensional accuracy in the horizontal direction and enabling the mounting arm 190 to be accurately positioned.

[0108] In some specific embodiments of the present invention, the side of the frame 110 close to the translation seat 170 can be arched upward to increase the space and facilitate the left welding station 200 or the right welding station 210 to move in or out.

[0109] Reference Figure 5 The present invention also provides a body welding method for an electric track vehicle, which is applied to the body welding device of the electric track vehicle. The welding method mainly includes three steps.

[0110] Among them, in step 1 S1, the accessories of the vehicle body are respectively fixed to the first welding station 120, the second welding station 130, the third welding station 140, the fourth welding station 150 and the left welding station 200, and the accessories on the left welding station 200 are welded together, so that the parts inside the vehicle body are fixed or welded together, and the parts on the outer part of the vehicle body are fixed or welded together, thereby improving the dimensional accuracy of the parts inside the vehicle body, realizing modular welding, and improving welding efficiency. At the same time, the parts on the outer part of the vehicle body are improved to avoid linear sequential welding, which increases the deformation of the vehicle body and makes the dimensional accuracy of the vehicle body difficult to control.

[0111] The left welding station 200 and the right welding station 210 are indicative references to the two ends of the mounting arm 190. Since the mounting arm 190 is rotated during use, the directions may be opposite to those shown in the figure.

[0112] In step two S2, the frame 110 is lifted and the rotating seat 180 is rotated so that the left welding station 200 is located close to the frame 110, and then the translation seat 170 is moved so that the left welding station 200 is located in the area surrounded by the first welding station 120, the second welding station 130, the third welding station 140 and the fourth welding station 150.

[0113] Therefore, after the lifting frame 110, the translation seat 170 can move smoothly without hindrance, making it convenient to move the corresponding workstation to the area surrounded by the first welding station 120, the second welding station 130, the third welding station 140 and the fourth welding station 150, so as to weld the vehicle body into a whole.

[0114] In some specific embodiments of the present invention, some accessories can be hoisted and fixed to the left welding station 200. At the same time, the accessories are fixed to one or more of the first welding station 120, the second welding station 130, the third welding station 140 and the fourth welding station 150 to meet the needs of vehicle body welding.

[0115] In step three S3, the frame 110 is lowered, and then the accessories on the first welding station 120, the second welding station 130, the third welding station 140, the fourth welding station 150 and the left welding station 200 are welded together. At the same time, accessories are added to the right welding station 210 and the accessories on the right welding station 210 are welded together.

[0116] That is, after the frame 110 falls, the vehicle body can be welded to manufacture the vehicle body, and at the same time, the welding preparation work for the next vehicle body is carried out at the idle right welding station 210, or the partial welding work of the next vehicle body is carried out.

[0117] Reference Figure 6 For the case where the first welding station 120 and the like have a rotatable mounting frame 220, in some specific embodiments of the present invention, step 1 S1' may further include rotating the first welding station 120, the second welding station 130, the third welding station 140, and the fourth welding station 150 so that the clamping components of the corresponding vehicle models face upward to meet the needs of vehicle model switching, and then, the accessories of the vehicle body are respectively fixed to the first welding station 120, the second welding station 130, the third welding station 140, the fourth welding station 150 and the left welding station 200, and the accessories on the left welding station 200 are welded together.

[0118] In the welding method of the present invention, since the welding of the accessories around the vehicle body and the welding of the accessories inside the vehicle body are first performed and then the two parts are welded together, whether the welding sequence is reasonable also affects the final time consumption.

[0119] Therefore, the welding method of this embodiment further includes a welding time optimization part, and the welding time optimization step includes:

[0120] First, calculate the total time consumed by the internal parts of the vehicle body, T in , count the total time consumed by the external parts of the vehicle body T out , calculate the total time consumption T of the internal parts of the vehicle body in Total time spent with the external parts of the vehicle body T out The absolute difference Δ 总 , Δ 总 =|T out -T in |

[0121] Total time for the internal parts of the vehicle body is T in Total time consumption for the exterior parts of the vehicle body T out For statistics, we can first calculate the welding time t1 of each accessory, and then add up the welding time of each accessory to get the total time.

[0122] The welding time t1 for each accessory includes the time for welding the weld and the necessary preparation time. The time for welding the weld is equal to the product of the weld length and the welding speed, and the necessary preparation time is an amortized value, which is the sum of the time from starting the welding gun to the start of welding, the time taken for the welding gun to move between different accessories, and the time for the welding gun to return to its original position, divided by the number of accessories.

[0123] Total time for the internal parts of the vehicle body is T in， We should also consider the situation where the internal parts are distributed to multiple welding robots to reduce the total time consumption. In this case, the total time consumption T of the internal parts of the vehicle body is in It is equal to the sum of the time taken by the welding robot with the heaviest workload and the necessary loading time.

[0124] Reasonable allocation of each welding robot helps to reduce the total time consumption.

[0125] The absolute difference Δ 总 Compared with the target setting value, when the absolute difference Δ 总 If the target value is within the target setting range, welding can be performed. If the target value is exceeded, it is necessary to consider transferring part of the parts to another welding process to reduce the absolute difference Δ 总。 The target setting value is generally based on 30 seconds, but it can also be reasonably increased or decreased based on actual conditions.

[0126] In some specific embodiments of the present invention, the welding time T after the left welding station 200 or the right welding station 210 enters the frame 110 can be counted. 末尾 , the welding time is T 末尾 Total time spent with the internal parts of the vehicle body T inAfter the sum is calculated, it is then added to the total time consumed by the external parts of the vehicle body T out The comparison is performed to meet the production situation that the left welding station 200 and the right welding station 210 are both fixing the same model of vehicle accessories, to avoid the left welding station 200 or the right welding station 210 starting work first, and to avoid evaluation failure due to differences in the starting point of time.

[0127] In the description of this specification, the description with reference to the terms "one embodiment, some embodiments, illustrative embodiments, examples, specific examples or some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0128] The terms "first, second, third, fourth", etc. (if any) in the specification and claims of this application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments described herein can be implemented in an order other than that shown or described herein.

[0129] It should also be noted that in the description of this specification, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0130] In addition, the terms "comprises" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may also include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0131] Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0132] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. The body welding device of the electric track vehicle is characterized in that: include: A first welding tool (100) comprises a frame (110) and a power member for driving the frame (110) to rise and fall, wherein four sides of the frame (110) are respectively and sequentially provided with a first welding station (120), a second welding station (130), a third welding station (140) and a fourth welding station (150); A second welding tool (160) comprises a translation seat (170), a rotating seat (180) arranged on the translation seat (170), the rotating seat (180) being provided with a mounting arm (190), the rotating seat (180) being connected to the middle part of the mounting arm (190), and a left welding station (200) and a right welding station (210) being respectively arranged at two ends of the mounting arm (190); When the frame (110) is raised, the translation seat (170) moves, so that one of the left welding station (200) and the right welding station (210) moves to an area surrounded by the first welding station (120), the second welding station (130), the third welding station (140) and the fourth welding station (150), and the other of the left welding station (200) and the right welding station (210) is located outside the frame (110); When the frame (110) descends, the first welding station (120), the second welding station (130), the third welding station (140), the fourth welding station (150) and the left welding station (200) or the right welding station (210) cooperate to form a vehicle body welding fixture; The frame (110) has two opposite short sides and two opposite long sides, the vehicle body welding device comprises a frame, one long side of the frame (110) is rotatably connected to the frame, and hydraulic cylinders (111) connected to the frame are provided at both ends of the other long side of the frame (110), the hydraulic cylinders (111) being used to drive the frame (110) to swing and rise and fall; At least one of the first welding station (120), the second welding station (130), the third welding station (140) and the fourth welding station (150) comprises a mounting frame (220), the mounting frame (220) having an upper mounting surface (230) and a lower mounting surface, the upper mounting surface (230) being provided with a first clamping assembly (240), the lower mounting surface being provided with a second clamping assembly, the first clamping assembly (240) being used to clamp parts of one type of vehicle body, the second clamping assembly being used to clamp parts of another type of vehicle body, one of the mounting frame (220) and the frame (110) being provided with a rotating shaft (250), the other of the mounting frame (220) and the frame (110) being provided with a center hole for accommodating the rotating shaft (250), the rotating shaft (250) and the center hole being cooperated to realize the rotation of the mounting frame (220), so that the first clamping assembly (240) and the second clamping assembly are alternately facing upwards.

2. The body welding device of the electric track vehicle according to claim 1, characterized in that: The rotating shaft (250) and the center hole are capable of moving along the axial direction of the rotating shaft (250); one of the mounting frame (220) and the frame (110) is provided with two latches (260); the rotating shaft (250) is provided between the two latches (260); and the other of the mounting frame (220) and the frame (110) is provided with two insertion holes; the insertion holes cooperate with the latches (260) to position the mounting frame (220).

3. The body welding device of the electric track vehicle according to claim 2, characterized in that: The frame (110) is provided with a cylinder for pulling and pushing the mounting frame (220), the push rod of the cylinder is provided with a T-shaped driving end, and the mounting frame (220) is provided with a T-shaped through-groove (270) that cooperates with the T-shaped driving end.

4. The body welding device of the electric track vehicle according to claim 2, characterized in that: The first clamping assembly (240) and the second clamping assembly both comprise at least one backing mold (280), at least one clamping member (290), and an electric member (300) that drives the clamping member (290) to move closer to the backing mold (280); the electric member (300) is connected to an electric connector; the frame (110) is provided with a docking member that docks with the electric connector; the electric connector is fixed to the mounting frame (220); and the electric connector and the docking member are plugged together along the axial direction of the rotating shaft (250).

5. The body welding device of the electric track vehicle according to claim 1, characterized in that: The translation seat (170) moves along the width direction of the frame (110); one of the ends of the frame and the mounting arm (190) is provided with a positioning hole; the other of the ends of the frame and the mounting arm (190) is provided with a positioning pin (310) matching the positioning hole; the positioning hole and the positioning pin (310) are plugged in along the moving direction of the translation seat (170) to position the mounting arm (190).

6. The body welding device for an electric track vehicle according to claim 5, characterized in that: The frame is provided with a step portion (320), the step portion (320) having a first bottom surface (330) and a first side surface (340), the first bottom surface (330) being used to support the end of the mounting arm (190), a guide inclined surface (350) being provided on a side of the first bottom surface (330) away from the first side surface (340), the first side surface (340) being used to abut against the end of the mounting arm (190) for limiting position, and the first side surface (340) being provided with the positioning pin (310) or the positioning hole correspondingly.

7. A method for welding the body of an electric track vehicle, characterized in that: The vehicle body welding device applied to the electric track vehicle according to any one of claims 1 to 6, wherein the vehicle body welding method comprises: Step 1: fixing the accessories of the vehicle body to the first welding station (120), the second welding station (130), the third welding station (140), the fourth welding station (150) and the left welding station (200) respectively, and welding the accessories on the left welding station (200) together; Step 2: lifting the frame (110) to rotate the rotating seat (180) so that the left welding station (200) is located in a direction close to the frame (110), and then moving the translation seat (170) so that the left welding station (200) is located in an area surrounded by the first welding station (120), the second welding station (130), the third welding station (140) and the fourth welding station (150); Step three, lowering the frame (110), and then welding together the accessories on the first welding station (120), the second welding station (130), the third welding station (140), the fourth welding station (150) and the left welding station (200), and at the same time, replenishing accessories on the right welding station (210) and welding together the accessories on the right welding station (210).

8. A method for welding the body of an electric track vehicle, characterized in that: A body welding device for an electric track vehicle as claimed in any one of claims 1 to 6; The frame (110) has two opposite short sides and two opposite long sides, the vehicle body welding device comprises a frame, one long side of the frame (110) is rotatably connected to the frame, and hydraulic cylinders (111) connected to the frame are provided at both ends of the other long side of the frame (110), the hydraulic cylinders (111) being used to drive the frame (110) to swing and rise and fall; At least one of the first welding station (120), the second welding station (130), the third welding station (140) and the fourth welding station (150) comprises a mounting frame (220), the mounting frame (220) having an upper mounting surface (230) and a lower mounting surface, the upper mounting surface (230) being provided with a first clamping assembly (240), the lower mounting surface being provided with a second clamping assembly, the first clamping assembly (240) being used to clamp parts of one type of vehicle body, the second clamping assembly being used to clamp parts of another type of vehicle body, one of the mounting frame (220) and the frame (110) being provided with a rotating shaft (250), the other of the mounting frame (220) and the frame (110) being provided with a center hole for accommodating the rotating shaft (250), the rotating shaft (250) and the center hole cooperating to realize the rotation of the mounting frame (220), so that the first clamping assembly (240) and the second clamping assembly are alternately facing upwards; The vehicle body welding method comprises: Step 1: Rotate the first welding station (120), the second welding station (130), the third welding station (140), and the fourth welding station (150) so that the clamping assembly of the corresponding vehicle model faces upward, and then respectively fix the accessories of the vehicle body to the first welding station (120), the second welding station (130), the third welding station (140), the fourth welding station (150), and the left welding station (200), and then weld the accessories on the left welding station (200) together; Step 2: lifting the frame (110) to rotate the rotating seat (180) so that the left welding station (200) is located in a direction close to the frame (110), and then moving the translation seat (170) so that the left welding station (200) is located in an area surrounded by the first welding station (120), the second welding station (130), the third welding station (140) and the fourth welding station (150); Step three, lowering the frame (110), and then welding together the accessories on the first welding station (120), the second welding station (130), the third welding station (140), the fourth welding station (150) and the left welding station (200), and at the same time, replenishing accessories on the right welding station (210) and welding together the accessories on the right welding station (210).

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