A welding fixture for a lower cross plate welding assembly of an automobile

Abstract

The utility model belongs to the technical field of clamp especially relates to automobile lower cross plate welding assembly's welding fixture, including bottom plate, fixed base, positioning assembly, pressure assembly and clamping assembly, positioning assembly includes the first positioning pin for positioning lower cross plate and the support block for supporting lower cross plate, pressure assembly includes the second positioning pin for positioning connecting piece and the pressure block for connecting piece pressure tightly in lower cross plate, clamping assembly includes the first clamping block for clamping lower cross plate with connecting piece in pressure assembly, pressure assembly, clamping assembly are respectively established in the front and rear two ends of fixed base, positioning assembly is adjacent to the setting with fixed base, and fixed base and positioning assembly are detachably installed on bottom plate. Realized the high accuracy repeat positioning to the clamping part. In addition, through the modular design, realize the quick dismounting and switching of each module and the clamp sharing of the same type lower cross plate welding assembly part, reduce the cost.

Description

Technical Field

[0001] This utility model belongs to the field of fixture technology, and in particular relates to a welding fixture for a welding assembly of a lower cross plate of an automobile. Background Technology

[0002] In the automotive manufacturing industry, please refer to Figures 10 to 12 The lower horizontal plate welding assembly includes a lower horizontal plate and connectors welded to its outer surface. The lower horizontal plate is a long strip with a U-shaped cross-section, consisting of an integrally formed cover plate and an arc-shaped plate. The cover plate includes two protruding strips extending along its length with relatively flat top surfaces. These two strips are positioned front and rear, forming a mounting area in the middle. The mounting area contains continuously alternating protrusions and grooves. Support plates extending upwards are located on the left and right sides of the cover plate. The arc-shaped plate bends downwards from the front of the cover plate and extends downwards towards the front of the cover plate, with outwardly extending inclined support feet on its bottom left and right sides. The connector has a U-shaped structure, including a top plate and inclined plates at the front and rear ends of the top plate. One inclined plate has a straight connecting section extending from its end, while the other inclined plate has an arc-shaped section extending from its end. In terms of dimensions, the length of the lower horizontal plate is greater than the width of the connector, while the width of the lower horizontal plate is greater than the length of the connector.

[0003] During the manufacturing process, to ensure the welding accuracy of the lower horizontal plate welding assembly, the two inner surfaces of the connector in the length direction must be fitted and fixed to the outer surface of the lower horizontal plate in the width direction. Specifically, the bottom surface of the connector section contacts and fits against the top surface of the lower horizontal plate protrusion, while the inner surface of the connector arc section contacts and fits against the outer arc surface of the arc plate. Then, the contact parts are connected by welding to finally form the lower horizontal plate welding assembly.

[0004] Due to the complex and irregular structure of the lower cross plate, it must be clamped and fixed using a special fixture during processing. Currently, different specifications of the same type of lower cross plate often require different fixtures. Existing fixtures are usually incompatible with lower cross plate products of the same type but different specifications. Therefore, when welding lower cross plates of the same type but different specifications, it is necessary to customize a special fixture and stop production for replacement and precision adjustment. This increases the design and manufacturing costs of the fixture, as well as inventory costs, and reduces production efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a welding fixture for a lower cross plate welding assembly of an automobile, which solves the problem that existing fixtures are not compatible with multiple lower cross plate parts of the same type, requiring the customization of new fixtures, which increases costs and reduces efficiency.

[0006] To achieve the above objectives, this utility model provides a welding fixture for a lower cross plate welding assembly, comprising a base plate, a fixed seat, a positioning component, a pressing component, and a clamping component. The positioning component includes a first positioning pin for positioning the lower cross plate and a support block for supporting the lower cross plate. The pressing component includes a second positioning pin for positioning a connecting piece and a pressing block for pressing the connecting piece against the lower cross plate. The clamping component includes a first clamping block for clamping the lower cross plate and the connecting piece against the pressing component. The pressing component and the clamping component are respectively disposed at the front and rear ends of the fixed seat, and the positioning component is disposed adjacent to the fixed seat. Both the fixed seat and the positioning component are detachably mounted on the base plate.

[0007] Furthermore, the positioning assembly also includes a stand, a lifting component, and a movable frame. The stand is detachably mounted on the base plate, the support block is located on the top of the stand, the lifting component is located on one side of the stand, and its output end is connected to the movable frame. The first positioning pin is located on the top of the movable frame.

[0008] Furthermore, the stand is also provided with a first stop to limit the upward stroke of the movable frame.

[0009] Furthermore, the clamping assembly includes a lifting member, a swing arm, and a positioning block. The clamping block includes a first clamping block and a second clamping block. The lifting member is located on the front side of the fixed base, and its output end is hinged to one end of the swing arm. The second clamping block, the positioning block, and the first clamping block are sequentially arranged from front to back on the bottom surface of the free end of the swing arm. The second positioning pin is located on the positioning block. The second clamping block and the positioning block together form a positioning cavity for positioning and clamping the connecting member. The first clamping block cooperates with the support block to clamp the connecting member and the lower horizontal plate. The second clamping block cooperates with the clamping assembly to clamp the connecting member and the lower horizontal plate. The translation direction of the lifting member is set at an angle to the base plate.

[0010] Furthermore, a third pressure block is provided at the bottom of the free end of the swing arm, and a first support block is provided on the fixed base. The first support block and the third pressure block cooperate in the vertical direction to press the lower horizontal plate.

[0011] Furthermore, the swing arm is hinged to the top of the fixed base, and the top of the fixed base is also provided with a limiting groove to limit the rotation angle of the swing arm.

[0012] Furthermore, the clamping assembly includes a translation member, a moving plate, and a first clamping block. The translation member is located on the rear side of the fixed base, and its output end is connected to the moving plate. The first clamping block is located on the moving plate and cooperates with the second pressure block to clamp the connecting member and the lower horizontal plate.

[0013] Furthermore, the movable plate is also provided with a second clamping block, and the fixed base is provided with a second support block on one side. The second support block and the second clamping block cooperate in the front-back direction to clamp the lower horizontal plate.

[0014] Furthermore, the fixed base is also provided with a second stop to limit the horizontal movement of the movable plate.

[0015] Furthermore, the pressing component and the clamping component are each provided in two sets, and the two sets of pressing components and clamping components are symmetrically arranged on the left and right sides of the positioning component through fixed seats.

[0016] The above-mentioned technical solutions in the welding fixture for the automotive lower cross plate welding assembly provided in this embodiment of the utility model have at least the following technical effects: First, the mounting area of ​​the lower horizontal plate is passed through the first positioning pin of the positioning assembly, and the cover plate of the lower horizontal plate is stably placed on the support block, completing the initial positioning of the lower horizontal plate. The top plate of the connector is positioned by passing through the second positioning pin of the clamping assembly. Then, the clamping assembly drives the pressure block to press the positioned connector against the cover plate of the lower horizontal plate and the outer surface of the arc plate, completing the initial fixation. Next, the clamping assembly drives the first clamping block to clamp the arc plate of the lower horizontal plate from the inside, clamping the lower horizontal plate and the connector together onto the pressure block. This achieves precise positioning and stable clamping of the lower horizontal plate and the connector. Then, the contact parts between the connector and the lower horizontal plate are automatically welded to form the lower horizontal plate welding assembly. After welding is completed, the clamping assembly, the clamping assembly, and the positioning assembly sequentially release their positioning of the lower horizontal plate welding assembly, and the finished product is removed, completing one work cycle.

[0017] The lower horizontal plate and connecting parts are positioned by the first and second positioning pins respectively. With the coordinated clamping of the support block, pressure block and clamping block, clamping deviation is effectively avoided, the consistency of each clamping is guaranteed, and high-precision repeatable positioning of the parts to be welded is achieved.

[0018] Furthermore, since the positioning components and fixing seats are detachably mounted on the base plate, and the clamping components and welding components are located at the front and rear ends of the fixing seats respectively, a modular structure is formed. This facilitates quick assembly and disassembly and overall workstation switching, and allows for flexible adjustment of the relative positions of the fixing seats and positioning components on the base plate, thereby changing the spatial positions of the clamping components and clamping components relative to the positioning components. This enables the fixture to adapt to the clamping requirements of lower horizontal plates of different specifications of the same type, improving the versatility of the fixture, reducing the cost of redesigning and manufacturing fixtures due to product changes, avoiding the debugging time of frequent fixture changes, shortening the production preparation cycle, and improving production efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a first-view structural schematic diagram of the welding fixture for the automotive lower cross plate welding assembly provided in an embodiment of the present utility model.

[0021] Figure 2 This is a structural diagram from a second perspective of the welding fixture for the automotive lower cross plate welding assembly provided in an embodiment of the present utility model.

[0022] Figure 3 This is a third-view structural diagram of the welding fixture for the automotive lower cross plate welding assembly provided in an embodiment of the present utility model.

[0023] Figure 4 This is a structural diagram of a welding fixture for holding the lower horizontal plate welding assembly of an automobile, provided in an embodiment of the present invention.

[0024] Figure 5 This is a structural diagram of the positioning component of the welding fixture for the automotive lower cross plate welding assembly provided in an embodiment of the present utility model.

[0025] Figure 6 This is a first-view structural diagram of the clamping assembly and clamping assembly of the welding fixture for the automotive lower cross plate welding assembly provided in an embodiment of the present utility model.

[0026] Figure 7 This is a second-view structural diagram of the clamping assembly and clamping assembly of the welding fixture for the automotive lower cross plate welding assembly provided in an embodiment of the present utility model.

[0027] Figure 8 This is a structural diagram of the clamping assembly positioning connector of the welding fixture for the automotive lower cross plate welding assembly provided in this embodiment of the utility model.

[0028] Figure 9 This is a structural diagram of the clamping assembly of the welding fixture for the automotive lower cross plate welding assembly provided in an embodiment of the present utility model.

[0029] Figure 10 This is a first-view structural diagram of the lower horizontal plate welding assembly.

[0030] Figure 11 This is a structural diagram of the lower horizontal plate welding assembly from a second-view perspective.

[0031] Figure 12This is a structural diagram of the connecting parts in the lower horizontal plate welding assembly.

[0032] In the diagram, 100 is the base plate, 110 is the fixed base, 111 is the first support block, 112 is the limiting groove, 113 is the second support block, and 114 is the second stop block. 200. Positioning component; 210. First positioning pin; 220. Support block; 230. Stand; 240. Lifting component; 250. Movable frame; 260. First stop block. 300. Clamping assembly; 310. Second positioning pin; 320. Lifting component; 330. Swing arm; 340. Positioning block; 350. First pressing block; 360. Second pressing block; 370. Third pressing block. 400 Clamping assembly; 410 First clamping block; 420 Translation component; 430 Moving plate; 440 Second clamping block. 500. Lower horizontal plate; 510. Raised strip; 520. Support plate; 530. Curved plate; 540. Support leg. 600. Connector; 610. Connecting section; 620. Arc-shaped section. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of this utility model, and should not be construed as limiting the utility model.

[0034] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0037] In one embodiment of the welding fixture for the automotive lower cross plate welding assembly of this utility model, please refer to... Figures 1 to 9 The welding fixture for the lower cross plate welding assembly of an automobile includes a base plate 100, two fixed seats 110, a positioning assembly 200, two sets of clamping assemblies 300, and two sets of clamping assemblies 400. The positioning assembly 200 is located in the middle of the base plate 100, and the two fixed seats 110 are symmetrically arranged on the left and right sides of the positioning assembly 200. The clamping assemblies 300 and clamping assemblies 400 are respectively located at the front and rear ends of the fixed seats 110 near the positioning assembly 200. The fixed seats 110 are detachably mounted on the base plate 100. The positioning assembly 200 includes a stand 230, a lifting component 240, a movable frame 250, a first positioning pin 210, and a support block 220. The stand 230 is detachably mounted on the base plate 100. The support block 220 is located on the top of the stand 230. The lifting component 240 is located on one side of the stand 230, and its output end is connected to the movable frame 250. The first positioning pin 210 is located on the top of the movable frame 250.

[0038] Specifically, there are two support blocks 220, which are respectively installed at the left and right ends of the top of the stand 230; there are correspondingly two first positioning pins 210, which are respectively installed on the left and right sides of the top of the movable frame 250. The lower horizontal plate 500 has two positioning holes in the installation area along the length direction for the two first positioning pins 210 to be inserted for positioning.

[0039] When the lifting component 240 drives the movable frame 250 to rise vertically to the preset position, the positioning holes of the mounting area of ​​the lower horizontal plate 500 pass through the two first positioning pins 210, and the support block 220 supports the bottom of the mounting area of ​​the lower horizontal plate 500. At this time, the top surface of the movable frame 250 is lower than the top surface of the support block 220, thereby ensuring that the support block 220 in the positioning assembly contacts and stably supports the lower horizontal plate 500. The initial positioning of the lower horizontal plate 500 is achieved through the support blocks 220 on the left and right sides together with the first positioning pins 210. In addition, the first positioning pins 210 and the support blocks 220 are arranged adjacent to each other, further enhancing the positioning and support effect of the same area of ​​the lower horizontal plate 500. This reduces the welding deformation of the lower horizontal plate 500 and improves the quality of the welded product.

[0040] Preferably, please refer to Figure 5The support 230 is also provided with a first stop 260 to limit the upward stroke of the movable frame 250. When the lifting component 240 drives the movable frame 250 to move upward to the preset position, the first stop 260 precisely abuts against the movable frame 250, limiting its continued upward movement and preventing the top of the movable frame 250 from being higher than the support block 220, thus affecting the support stability of the lower horizontal plate 500.

[0041] Please refer to Figures 6 to 8 The clamping assembly 300 includes a lifting member 320, a swing arm 330, a positioning block 340, and a pressing block. The pressing block includes a first pressing block 350 and a second pressing block 360. The lifting member 320 is obliquely installed on the front side of the fixed base 110, and the output end of the lifting member 320 is angled to the base plate 100 in the direction of translation. One end of the swing arm 330 is hinged to the output end of the lifting member 320. The second pressing block 360, the positioning block 340, and the first pressing block 350 are sequentially installed on the bottom surface of the free end of the swing arm 330 from front to back. The second positioning pin 310 is installed on the positioning block 340. The second pressing block 360 and the positioning block 340 together form a positioning cavity for positioning and clamping the connecting member 600. The first pressing block 350 and the support block 220 cooperate vertically to clamp the connecting member 600 and the lower horizontal plate 500. The second pressing block 360 and the clamping assembly 400 cooperate front and back to clamp the connecting member 600 and the lower horizontal plate 500.

[0042] Specifically, the top plate of the connector 600 is provided with a positioning pin hole for the insertion of the second positioning pin 310 to achieve precise positioning. The positioning block 340 is also provided with a downwardly extending limiting plate on one side. The positioning cavity is used to clamp the top of the positioning connector 100 and the outer surfaces of the inclined plates on both sides. The limiting plate and the positioning cavity cooperate to achieve circumferential positioning of the connector, thereby preventing the connector 600 from shifting due to force during pressing or welding.

[0043] After the positioning assembly 200 completes the positioning of the lower horizontal plate 500, the pin hole of the connector 700 passes through the second positioning pin 310, so that the connector 600 is stably confined in the positioning cavity. Then, the lifting member 320 drives one end of the swing arm 330 to rise, so that the free end of the swing arm 330 rotates downward, driving the pressure block to press the connector 600 as a whole onto the outer surface of the lower horizontal plate 500. In the clamped state, the first pressure block 350 presses the connecting section 610 of the connector onto the protrusion 510 of the lower horizontal plate, and cooperates with the support block 220 to press the contact area between the cover plate of the lower horizontal plate 500 and the connecting section 610 of the connector; the second pressure block 360 applies pressure in the inclined direction to the inclined plate of the connector 600, so that the arc-shaped section 620 of the connector is tightly pressed against the outer surface of the arc plate 530 of the lower horizontal plate. The translation direction of the output end of the lifting component 320 is set at an angle to the base plate 100, ensuring that the pressure block can press the connecting component 600 as a whole onto the lower horizontal plate 500 in a stable tilted state.

[0044] Preferably, please refer to Figure 7The bottom of the free end of the swing arm 330 is also provided with a third pressure block 370, and the outer side of the fixed base 110 is provided with a first support block 111. The first support block 111 and the third pressure block 370 cooperate in the vertical direction to press the lower horizontal plate 500. Specifically, the top of the first support block 111 supports the bottom of the support plate 520 of the lower horizontal plate, and the third pressure block 370 rotates downward with the swing arm 330, so that the third pressure block 370 presses the support plate 520 against the first support block 111, fixes both sides of the lower horizontal plate 500, and increases the stability of the clamping and positioning of the lower horizontal plate 500.

[0045] For further details, please refer to... Figure 8 The swing arm 330 is hinged to the top of the fixed base 110. The top of the fixed base 110 is also provided with a limiting groove 112 to limit the rotation angle of the swing arm 330. Specifically, when the lifting member 240 drives one end of the swing arm 330 to move up and down, the swing arm 330 uses the hinge point of the fixed base 110 as a fulcrum to ensure that the other end of the swing arm 330 can stably rotate up and down around the fulcrum. When the free end of the swing arm 330 rotates downward to a preset angle, the first pressure block 350 and the second pressure block 360 are in a state of stably pressing the connecting member 600 against the lower horizontal plate 500. At this time, the limiting groove 112 plays a limiting role on the bottom of the swing arm 330, preventing its free end from continuing to rotate downward, thereby avoiding deformation of the connecting member 600 and the lower horizontal plate 500 due to excessive pressure from the pressure blocks.

[0046] Please refer to Figure 6 and Figure 9 The clamping assembly 400 is installed at the rear end of the fixed base 110 and includes a translation member 420, a moving plate 430 and a first clamping block 410. The translation member 420 is located on the fixed base 110 and its output end is connected to the moving plate 430. The first clamping block 410 is located on the moving plate 430 and cooperates with the second pressure block 440 to clamp the connecting member 600 and the lower horizontal plate 500.

[0047] Specifically, the clamping surface of the first clamping block 410 is an arc-shaped surface that fits the inner surface of the arc-shaped plate 530. After the clamping assembly 400 presses the connector 600 against the outer side of the lower horizontal plate 500, the clamping assembly 400 operates, and the translation component 420 drives the first clamping block 410 forward, so that the clamping surface of the first clamping block 410 presses against the arc-shaped plate 530 of the lower horizontal plate, applying an inclined pressure from the inner side of the lower horizontal plate 500 outward, ensuring that the arc-shaped plate 530 of the lower horizontal plate and the arc-shaped segment 620 of the connector are tightly fitted, and supporting the contact area between the two to prevent deformation during subsequent welding.

[0048] For further details, please refer to... Figure 9The movable plate 430 is also provided with a second clamping block 440, and a second support block 113 is provided on one side of the fixed base 110. The second support block 113 and the second clamping block 440 cooperate in the front-back direction to clamp the lower horizontal plate 500. The fixed base 110 is also provided with a second stop block 260 to limit the horizontal movement of the movable plate 430. Specifically, the second support block 113 and the second clamping block 440 respectively clamp and fit against the outer and inner sides of the lower horizontal plate support leg 540. After the positioning assembly 200 completes the positioning of the lower horizontal plate 500, the second support block 113 abuts against the support leg 540 supporting the lower horizontal plate. After the clamping assembly 400 is activated, the translation component 420 drives the movable plate 430 to translate to the designated position. At this time, the second stop block 114 abuts against the movable plate 430 to limit its further movement. Simultaneously, the first clamping block 410 is stably pressed against the inner side of the lower horizontal plate 500, and the second clamping block 440 presses the lower horizontal plate support leg 540 tightly onto the second support block 113. This ensures the clamping stability of the entire lower horizontal plate 500, effectively prevents welding deformation, and avoids damage to the product to be welded due to excessive pressure from the first clamping block 410 and the second clamping block 440.

[0049] The usage process of this utility model welding fixture is as follows: The lower horizontal plate 500 is passed through the two first positioning pins 210 of the positioning assembly 200, so that the two support blocks 220 support the mounting area of ​​the lower horizontal plate 500. Simultaneously, the two first support blocks 111 located on the left and right sides of the positioning assembly 200 respectively support the support plates 520 on both sides of the lower horizontal plate. The two second support blocks 113 respectively abut against and support the support feet 540 on both sides of the lower horizontal plate, providing an upward inclined support force, thereby completing the overall positioning of the lower horizontal plate 500. Next, the connecting piece 600 is passed through the second positioning pin 310 and confined within the positioning cavity. The two sets of clamping assemblies 300 work synchronously, driving the swing arm 330 to rotate, so that the two connecting pieces 600 positioned by the two clamping assemblies 300 are respectively pressed against both ends of the lower horizontal plate 500. At the same time, the third pressure block 370 cooperates with the first support blocks 111 to press the support plates 520 of the lower horizontal plate vertically. Subsequently, the clamping assemblies 400 on both sides are activated simultaneously, the moving plate 430 moves forward, pushing the two first clamping blocks 410 to abut against the inner side of the arc-shaped plate 530 of the lower horizontal plate, while the second clamping block 440, together with the second support block 113, presses the support leg 540 of the lower horizontal plate, completing the clamping and positioning of the two connecting parts 600 and the outer surface of the lower horizontal plate 500. Finally, the contact parts between the connecting parts 600 and the lower horizontal plate 500 are automatically welded to form the lower horizontal plate welding assembly.

[0050] After welding is completed, the translating component 420 of the clamping assembly, the lifting component 320 of the pressing assembly, and the lifting component 240 of the positioning assembly are reset sequentially. The positioning pin automatically retracts from the lower horizontal plate welding assembly, thus releasing the welding assembly, and the finished product is then removed. This completes one work cycle. This process can be continuously repeated and is suitable for mass production.

[0051] The lower horizontal plate 500 and the connecting piece 600 are positioned by the first positioning pin 210 and the second positioning pin 310 respectively. Combined with the coordinated clamping of the support block 220, pressure block, clamping block, and support block, clamping deviations are effectively avoided, ensuring consistency and stability in each clamping operation, and achieving high-precision repeatable positioning of the parts to be welded. Furthermore, two sets of pressing components 300 and clamping components 400 are provided on both sides of the positioning assembly 200, simultaneously fixing the two connecting pieces 600 to the lower horizontal plate 500, improving clamping stability and welding efficiency.

[0052] Furthermore, since the positioning component 200 and the fixed base 110 are detachably mounted on the base plate 100, and the clamping component 300 and the clamping component 400 are respectively located at the front and rear ends of the fixed base 110, a modular structure is formed. This facilitates quick assembly and disassembly and overall workstation switching, and allows for flexible adjustment of the relative positions of the fixed base 110 and the positioning component 200 on the base plate 100, thereby changing the spatial positions of the clamping component 300 and the clamping component 400 relative to the positioning component 200. This enables the fixture to adapt to the clamping requirements of different specifications of the same type of lower horizontal plate 400, improving the versatility of the fixture, reducing the cost of redesigning and manufacturing fixtures due to product changes, avoiding the debugging time of frequent fixture changes, shortening the production preparation cycle, and improving production efficiency.

[0053] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A welding fixture for a lower cross plate welding assembly of an automobile, characterized in that, The device includes a base plate, a fixed seat, a positioning assembly, a pressing assembly, and a clamping assembly. The positioning assembly includes a first positioning pin for positioning the lower horizontal plate and a support block for supporting the lower horizontal plate. The pressing assembly includes a second positioning pin for positioning the connector and a pressing block for pressing the connector onto the lower horizontal plate. The clamping assembly includes a first clamping block for clamping the lower horizontal plate and the connector onto the pressing assembly. The pressing assembly and the clamping assembly are respectively located at the front and rear ends of the fixed seat. The positioning assembly is arranged adjacent to the fixed seat, and both the fixed seat and the positioning assembly can be detachably installed on the base plate.

2. The welding fixture for the automotive lower cross plate welding assembly according to claim 1, characterized in that: The positioning assembly also includes a stand, a lifting component, and a movable frame. The stand is detachably mounted on the base plate, the support block is located on the top of the stand, the lifting component is located on one side of the stand, and its output end is connected to the movable frame. The first positioning pin is located on the top of the movable frame.

3. The welding fixture for the automotive lower cross plate welding assembly according to claim 2, characterized in that: The stand is also provided with a first stop to limit the upward stroke of the movable frame.

4. The welding fixture for the automotive lower cross plate welding assembly according to any one of claims 1 to 3, characterized in that: The clamping assembly includes a lifting member, a swing arm, and a positioning block. The clamping block includes a first clamping block and a second clamping block. The lifting member is located on the front side of the fixed base, and its output end is hinged to one end of the swing arm. The second clamping block, the positioning block, and the first clamping block are sequentially arranged from front to back on the bottom surface of the free end of the swing arm. The second positioning pin is located on the positioning block. The second clamping block and the positioning block together form a positioning cavity for positioning and clamping the connecting member. The first clamping block cooperates with the support block to clamp the connecting member and the lower horizontal plate. The second clamping block cooperates with the clamping assembly to clamp the connecting member and the lower horizontal plate. The translation direction of the lifting member is set at an angle to the base plate.

5. The welding fixture for the automotive lower cross plate welding assembly according to claim 4, characterized in that: The bottom of the free end of the swing arm is further provided with a third pressure block, and the fixed base is provided with a first support block. The first support block and the third pressure block cooperate in the vertical direction to press the lower horizontal plate.

6. The welding fixture for the automotive lower cross plate welding assembly according to claim 5, characterized in that: The swing arm is hinged to the top of the fixed base, and the top of the fixed base is also provided with a limiting groove to limit the rotation angle of the swing arm.

7. The welding fixture for the automotive lower cross plate welding assembly according to claim 4, characterized in that: The clamping assembly includes a translating member, a moving plate, and a first clamping block. The translating member is located on the rear side of the fixed base, and its output end is connected to the moving plate. The first clamping block is located on the moving plate and cooperates with the second pressure block to clamp the connecting member and the lower horizontal plate.

8. The welding fixture for the automotive lower cross plate welding assembly according to claim 7, characterized in that: The movable plate is also provided with a second clamping block, and a second support block is provided on one side of the fixed base. The second support block and the second clamping block cooperate in the front-back direction to clamp the lower horizontal plate.

9. The welding fixture for the automotive lower cross plate welding assembly according to claim 7, characterized in that: The fixed base is also provided with a second stop to limit the horizontal movement of the movable plate.

10. The welding fixture for the automotive lower cross plate welding assembly according to claim 1, characterized in that: The pressing component and clamping component are provided in two sets, and the two sets of pressing components and clamping components are symmetrically arranged on the left and right sides of the positioning component through fixed bases.

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