CN-117399877-B - Welding tool and welding method for battery case cross beam

CN117399877BCN 117399877 BCN117399877 BCN 117399877BCN-117399877-B

Abstract

The application discloses a welding tool and a welding method for a battery case beam, wherein the welding tool comprises a base, a main body positioning unit, a pressing unit and a connecting rod supporting unit, wherein the main body positioning unit is arranged on the base and is used for supporting and positioning a beam structure of the battery case beam, the pressing unit is arranged on the base and is used for applying pressure to the beam structure of the battery case beam, and the connecting rod supporting unit is arranged on the base and is used for supporting a connecting rod which is not assembled. The structural design of the application completely accords with the structural characteristics of the battery case cross beam, can ensure the assembly accuracy, avoid clamping pieces and ensure the product quality of subsequent welding.

Inventors

WANG XIZE
WU PI
HAO XUEJUN
RAO SONG
YANG XINHUA
ZHU CHUANSEN
XIAO XIANWU
LI TAO
JIANG DUNFEI
XIA ZHENXI

Assignees

华工法利莱切焊系统工程有限公司

Dates

Publication Date: 20260512
Application Date: 20231108

Claims (17)

1. The welding tool for the battery case cross beam is characterized in that the battery case cross beam comprises a cross beam structure and a connecting rod, the cross beam structure comprises a cross beam main body, the connecting rod comprises a rod body with the top penetrating through the cross beam main body and an end cap connected with the rod body, and the end cap is positioned at the bottom of the cross beam main body and outside the cross beam main body; the welding fixture comprises: A base; The main body positioning unit is arranged on the base and used for supporting and positioning a beam structure of the battery case beam; The pressing unit is arranged on the base and is used for applying pressure to the beam structure of the battery case beam; and a connecting rod supporting unit installed on the base for supporting the connecting rod which is not assembled; The main body positioning unit comprises a main body supporting unit, a main body positioning unit and a main body positioning unit, wherein the main body supporting unit is used for supporting the whole beam structure; and a lifting unit connected with the main body supporting unit and used for driving the main body supporting unit and the battery case cross beam The beam structure of the device moves linearly in the height direction; The connecting rod supporting unit comprises a left connecting rod supporting component and a right connecting rod supporting component which are connected with the base and are used for supporting a connecting rod which is not assembled with the beam structure respectively; When the beam structure and the connecting rod are not assembled, the pressing unit applies pressure to the beam structure placed on the main body supporting unit, and the lifting unit drives the main body supporting unit and the beam structure to move downwards integrally so as to assemble the beam structure and the connecting rod; The main body supporting unit includes: A mounting plate; a left side support assembly for supporting and positioning a left side portion of the beam structure; A right side support assembly for supporting and positioning a right side portion of the beam structure; and a middle support assembly for supporting and positioning a middle portion of the beam structure; the left side support assembly includes: a left arm mounted on the mounting plate; The left beam support piece is connected with the left support arm at one end and extends towards the direction away from the left support arm at the other end, and is used for bearing and supporting the left part of the beam structure; a first L-shaped piece locating pin adapter block connected with the left support arm; the first L-shaped piece locating pin mounting block is connected with the first L-shaped piece locating pin switching block and is used for mounting a first L-shaped piece locating pin which can penetrate through one L-shaped bracket of the beam structure in the height direction; the first cover plate positioning pin adapter block is connected with the left support arm; And a first cover plate locating pin mounting block connected with the first cover plate locating pin switching block for mounting a first cover plate locating pin, wherein the first cover plate locating pin is used for penetrating through the cover plate of the left part of the beam structure in the height direction/penetrating through the cover plate of the left part of the beam structure and the beam main body in the height direction at the same time.
2. The welding fixture of claim 1, wherein the left side support assembly further comprises a left side auxiliary support member coupled to the base for bearing support of the left side portion of the beam structure.
3. The welding tooling of claim 1, wherein the right side support assembly comprises: A right arm mounted on the mounting plate; The right beam support piece is connected with the right support arm at one end and extends in a direction away from the right support arm at the other end, and is used for bearing and supporting the right part of the beam structure; a second L-shaped piece locating pin adapter block connected with the right support arm; The second L-shaped piece locating pin mounting block is connected with the second L-shaped piece locating pin switching block and is used for mounting a second L-shaped piece locating pin which can penetrate through the other L-shaped bracket of the beam structure in the height direction; the second cover plate positioning pin adapter block is connected with the right support arm; And a second cover plate locating pin mounting block connected with the second cover plate locating pin switching block for mounting a second cover plate locating pin, wherein the second cover plate locating pin is used for penetrating through the cover plate of the right side part of the beam structure in the height direction/penetrating through the cover plate of the right side part of the beam structure and the beam main body in the height direction at the same time.
4. The welding fixture of claim 3, wherein the right side support assembly further comprises a right side auxiliary support member coupled to the second L-shaped member dowel pin adapter block for bearing support of the right side portion of the beam structure.
5. The welding tooling of claim 1, wherein the middle support assembly comprises: A beam limiting unit connected to the mounting plate for limiting the position of the middle part of the beam structure so that the beam is tied The structure moves only in the height direction; the beam limiting unit comprises two parallel guide limiting blocks which are connected with the mounting plate and two guide limiting blocks A gap for accommodating the middle part of the whole/part of the beam structure is formed between the guide limiting blocks.
6. The welding fixture of claim 1, wherein the hold-down unit comprises: the left side beam pressing component and the right side beam pressing component are connected with the base and are used for respectively applying pressure to the left side part and the right side part of the beam structure which are assembled by the connecting rod; the left connecting rod pressing assembly and the right connecting rod pressing assembly are connected with the base and are used for respectively applying pressure to the connecting rods of the left part and the connecting rods of the right part of the cross beam structure of which the connecting rod assembly is completed; and an intermediate hold-down assembly connected to the base for applying pressure to the beam body in the middle portion of the beam structure.
7. The welding tooling of claim 6, wherein the left side rail hold down assembly/right side rail hold down assembly comprises: A first cylinder mount connected to the base; A first cylinder connected to the first cylinder mount; The first pressing arm is connected with the power output end of the first cylinder and is driven by the first cylinder to rotate; The first L-shaped part pressing block is connected with the first pressing arm and is used for pressing the L-shaped bracket of the beam structure under the drive of the first pressing arm; and a first beam pressing block connected with the first pressing arm and used for connecting the beam under the drive of the first pressing arm The beam body of the structure applies pressure.
8. The welding tooling of claim 6, wherein the left side connecting rod hold down assembly/right side connecting rod hold down assembly comprises: The second cylinder mounting rack is connected with the base; a second cylinder connected to the second cylinder mount; The second pressing arm is connected with the power output end of the second cylinder and is driven by the second cylinder to rotate; a lower pressing piece switching block connected with the second pressing arm; A first pressing piece connected with the pressing piece switching block and used for driving the beam structure under the driving of the second pressing arm The crossbeam main body and/or the L-shaped bracket exert pressure; A second pressing piece connected with the pressing piece switching block and used for driving the beam structure by the second pressing arm The connecting rod reinforcing sheet applies pressure; And a connecting rod pressing block connected with the lower pressing piece and used for connecting under the drive of the second pressing arm The portion of the rod extending from the upper end face of the beam body applies pressure.
9. The welding tooling of claim 6, wherein the intermediate hold-down assembly comprises: A middle pressing cylinder mounting frame; The middle pressing cylinder is connected with the middle pressing cylinder mounting frame; An intermediate pressing arm connected to the power output end of the intermediate pressing cylinder and driven by the intermediate pressing cylinder Rotating; a middle pressing-down conversion block connected with the middle pressing-down arm; a pressing beam connected with the middle pressing transfer block; and a pressing block connected with the pressing beam and used for driving the beam structure by the middle pressing arm The beam body of the middle portion applies pressure.
10. The welding tooling of claim 1, wherein the left side connecting rod support assembly/right side connecting rod support assembly comprises: the jacking pin lifting cylinder mounting block is mounted on the base; The jacking pin lifting cylinder is connected with the jacking pin lifting cylinder mounting block; The jacking pin supporting block is connected with a piston rod of the jacking pin lifting cylinder; And a jacking pin mounted on the jacking pin support block; The lifting pin lifting cylinder is used for driving the lifting pin supporting block and the lifting pin to synchronously move in the height direction so as to realize supporting and positioning of the connecting rod through the cooperation of the lifting pin and the connecting rod.
11. The welding fixture of claim 1, further comprising a connecting rod clamping the connecting rod The unit is arranged on the base and used for clamping and fixing the connecting rod which is not assembled; The connecting rod clamping unit comprises a left connecting rod clamping assembly and a right connecting rod clamping assembly which are connected with the base and used for respectively clamping and fixing a connecting rod which is not assembled with the beam structure.
12. The welding tooling of claim 11, wherein the left side connecting rod clamping assembly/right side connecting rod clamping assembly comprises: the walking cylinder mounting plate is connected with the base; a traveling cylinder mounted on the traveling cylinder mounting plate; the joint is connected with a piston rod of the walking cylinder; A walking cylinder adapter block connected to the joint; The walking cylinder slide rail is arranged on the base; The cylinder sliding mounting plate is in sliding fit with the walking cylinder sliding rail through a sliding block and is simultaneously connected with the walking air A cylinder adapter block; A jaw cylinder mounted on the cylinder slide mounting plate; The clamping jaw is connected with the power output end of the clamping jaw cylinder and is opened and closed under the action of the clamping jaw cylinder so as to Clamping the connecting rod/releasing the clamped connecting rod.
13. The welding fixture of claim 1, further comprising an end support sheet A unit mounted on the base for supporting both ends of the beam structure where the connection rod assembly is completed; the end supporting unit comprises a beam left end supporting component and a beam right end supporting component which are connected with the base, And the support device is used for supporting the left end head and the right end head of the beam structure correspondingly.
14. The welding fixture of claim 13, wherein the beam left end support assembly/beam right The head support assembly includes: The end support piece mounting base is connected with the base, and a U-shaped groove is formed on the end support piece mounting base A mouth; the beam support block is connected with the end support piece mounting base and is positioned in the U-shaped notch for aligning The end head of the beam structure is supported; The end head L-shaped piece supporting block is connected with the end head supporting piece mounting base and is used for bearing and supporting an L-shaped bracket at the end head of the beam structure; The end head limiting block conversion block is connected with the side surface of the end head supporting piece mounting base; And the end limiting block is connected with the end limiting block conversion block and is used for abutting against the end surface of the beam structure Is used to limit the position of the end of the beam structure.
15. The welding fixture of claim 1, further comprising a connecting rod detection unit mounted on the base for detecting whether a connecting rod is in a predetermined position and generating an opposing feedback signal; The detection signal receiving unit is arranged on the base and is used for receiving the feedback signal generated by the connecting rod detection unit; And the beam anti-reflection detection unit is arranged on the base and is used for detecting whether the battery case beam is reversely placed.
16. The welding fixture of claim 15, wherein the beam anti-reflection detection unit comprises: An anti-reflection detector mount connected to the base; a detection member mounting block connected to the anti-reflection detector mounting frame; the anti-reflection detection piece is arranged on the detection piece installation block and can move downwards under the action of pressure; An anti-reverse detection sensor connected with the detection member mounting block and/or the anti-reverse detector mounting frame for detecting the reverse of the detection member When moving downwards, the anti-reflection detection part is triggered, and a corresponding feedback signal is generated after the triggering.
17. A method of welding a battery case beam by the battery case of any one of claims 1-16 The welding tool for the cross beam is realized, and is characterized in that the welding method comprises the following steps: Acquiring a beam structure of a battery case beam; supporting and clamping a connecting rod of a battery case beam; completing the assembly of the beam structure and the connecting rod; Applying pressure to the beam structure and the connecting rod; and welding the matched parts of the connecting rod and the beam structure to obtain the battery shell beam.

Description

Welding tool and welding method for battery case cross beam Technical Field The invention relates to the field of intelligent manufacturing, in particular to a welding tool and a welding method for a battery case beam. Background The new energy automobile battery case beam is applied to an automobile chassis part and is mainly a structural part, a stress part and an assembly fixing part for fixing a battery pack. And when assembling crossbeam structure and connecting rod, because crossbeam structure itself exists the postweld deformation, can appear crossbeam structure and the unable condition of aiming at of connecting rod often during the assembly, produce frequent fastener's phenomenon from this, this condition needs to stop the line adjustment often, influences production efficiency. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a welding tool and a welding method for a battery case beam, the structural design of the welding tool and the welding method completely accords with the structural characteristics of the battery case beam, the assembly accuracy can be ensured, clamping pieces can be avoided, and the product quality of subsequent welding can be ensured. In order to achieve the above purpose, the present invention provides the following technical solutions: In one aspect, a welding frock of battery case crossbeam is provided, it includes: A base; The main body positioning unit is arranged on the base and used for supporting and positioning a beam structure of the battery case beam; The pressing unit is arranged on the base and is used for applying pressure to the beam structure of the battery case beam; and a connection rod supporting unit installed on the base for supporting the connection rod which is not assembled. On the other hand, the welding method of the battery case cross beam is further provided, and can be realized through the welding fixture of the battery case cross beam, and comprises the following steps: Acquiring a beam structure of a battery case beam; supporting and clamping a connecting rod of a battery case beam; completing the assembly of the beam structure and the connecting rod; Applying pressure to the beam structure and the connecting rod; and welding the matched parts of the connecting rod and the beam structure to obtain the battery shell beam. Compared with the prior art, the invention has the following beneficial effects: The structural design of the welding tool completely accords with the structural characteristics of the battery case cross beam, and can position different parts of the battery case cross beam through different supporting and clamping units, so that the assembly accuracy is ensured, and the product quality of subsequent welding is ensured. In addition, the connecting rod is positioned through the jacking pin, and the end cap of the connecting rod is clamped through the clamping jaw, so that the connecting rod is in an upright state, and the connecting rod can smoothly pass through the beam structure to finish the assembly of the two. Meanwhile, after the beam structure is placed on the main body supporting unit, the middle pressing component presses down to ensure that the position of the beam structure is stable, and then the lifting unit drives the beam structure to move down steadily, so that the holes in the beam structure for the connecting rods to pass through are accurately corresponding to the connecting rods, and assembly of the beam structure and the connecting rods is completed rapidly, and clamping conditions are avoided. Drawings FIG. 1 is an overall block diagram of a battery case beam in the present invention; FIG. 2 is a cross-sectional view of a battery case beam in accordance with the present invention; FIG. 3 is an overall structure diagram of a welding tool in the invention; FIG. 4a is a schematic view illustrating the assembly of the base and body positioning unit according to the present invention at a first viewing angle; FIG. 4b is a schematic view illustrating the assembly of the base and body positioning unit according to the present invention at a second viewing angle; Fig. 5 is an overall construction diagram of a body supporting unit in the present invention; fig. 6 is a front view of a battery case beam in the present invention; FIG. 7 is an overall construction view of the left side auxiliary support member of the present invention; FIG. 8 is a schematic view showing the assembly of the lifting unit, the main body supporting unit, and the battery case beam according to the present invention; FIG. 9 is an overall block diagram of the left side rail hold down assembly/right side rail hold down assembly of the present invention; FIG. 10 is an overall block diagram of the left side connecting rod hold down assembly/right side connecting rod hold down assembly of the present invention; FIG. 11 is an overall block diagram of an intermediate hold-down assembly of the present invention;