A high-stability welding positioning mechanism and welding workstation for automotive sheet metal parts

Abstract

This utility model discloses a high-stability welding positioning mechanism and welding workstation for automotive sheet metal parts. It includes a first positioning frame, a second positioning frame, a welding positioning frame, a first positioning component, a second positioning component, a first pressing component, and a second pressing component. The first positioning component is used to press and fix the middle part of the first sheet metal part; the second positioning component is used to press and fix the second sheet metal part; the welding positioning frame supports the first and second welding parts; the first pressing component presses and fixes the first and second welding parts onto the welding positioning frame while simultaneously fixing the first sheet metal part; and the second pressing component presses and fixes the second sheet metal part to the bottom of the first sheet metal part while simultaneously pressing and fixing the second sheet metal part onto a second positioning table. This positioning mechanism achieves multiple fixations for the first and second sheet metal parts, preventing wobbling during welding and improving welding quality.

Description

Technical Field

[0001] This utility model belongs to the field of automotive sheet metal welding positioning technology, and in particular relates to a highly stable welding positioning mechanism and welding workstation for automotive sheet metal parts. Background Technology

[0002] With the continuous development of the automotive industry, the requirements for automobile production efficiency and quality are increasing. As a crucial component of the automobile body, the welding quality of sheet metal parts directly affects the overall strength, safety, and appearance of the vehicle. In large-scale automobile production, a tooling system capable of quickly and accurately positioning sheet metal parts is needed to improve welding efficiency and quality, meeting the high-efficiency production demands of the automotive manufacturing industry.

[0003] In the process of welding automotive sheet metal parts, it is often necessary to position the first type of sheet metal part onto the second type of sheet metal part, and then weld the two types of sheet metal parts together using welding equipment. The existing method of positioning sheet metal parts is usually manual, in which the two types of sheet metal parts are placed on the corresponding welding table by hand. This causes the sheet metal parts to wobble on the welding table during welding, resulting in unstable welding and affecting the welding quality. Utility Model Content

[0004] The purpose of this utility model is to provide a highly stable welding positioning mechanism and welding workstation for automotive sheet metal parts, so as to solve the problem of unstable fixation during welding caused by conventional manual positioning in the prior art.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] In a first aspect, a highly stable welding positioning mechanism for automotive sheet metal parts is provided, comprising a base and two sets of positioning parts disposed on the base, wherein:

[0007] Two sets of positioning parts are spaced apart on the base. Each set of positioning parts includes a first positioning frame, a second positioning frame, a welding positioning frame, a first positioning component, a second positioning component, a first pressing component, and a second pressing component. The first positioning frame is provided with a first positioning platform. The two first positioning platforms are configured to jointly support a first sheet metal part. The two ends of the first sheet metal part along its own length are respectively placed on the two first positioning platforms. The first positioning component is provided on the first positioning frame and is configured to press and fix the middle part of the first sheet metal part located on the first positioning platform. The second positioning frame is provided with a second positioning platform. Each second positioning platform is configured to support a second sheet metal part. The second positioning component is provided on the second positioning frame and is configured to press and fix the corresponding second sheet metal part located on the second positioning platform.

[0008] The first sheet metal part has a first welded portion extending outward from both ends along its width direction. Each second sheet metal part has a second welded portion. The welding positioning frame is configured to support the first welded portion and the second welded portion. The first pressing assembly is disposed on one side of the first positioning frame. The first pressing assembly is configured to press and fix the first welded portion and the second welded portion on the welding positioning frame while fixing the first sheet metal part. The second pressing assembly is disposed on one side of the second positioning table. The second pressing assembly is configured to press and fix the second sheet metal part to the bottom of the first sheet metal part while pressing and fixing the second sheet metal part on the second positioning table.

[0009] Furthermore, the first positioning component includes a first positioning pin, which is vertically mounted on the first positioning platform. The top of the first positioning pin passes through the first positioning platform. The bottom of the first sheet metal part has a first positioning hole. The top of the first positioning pin is adapted to the first positioning hole. When the first sheet metal part is placed on the first positioning platform, the top of the first positioning pin is inserted into the first positioning hole, thereby positioning the first sheet metal part.

[0010] Furthermore, the second positioning component includes a second positioning pin, which is vertically mounted on the second positioning platform. The top of the second positioning pin passes through the second positioning platform. The bottom of the second sheet metal part has a second positioning hole. The top of the second positioning pin is adapted to the second positioning hole. When the first sheet metal part is placed on the second positioning platform, the top of the second positioning pin is inserted into the second positioning hole, thereby positioning the second sheet metal part.

[0011] Furthermore, the first pressing assembly includes a first pressing frame, a first pressing drive, and a first pressing member, wherein:

[0012] The first pressing frame is vertically mounted on the base, the first pressing member is vertically mounted on the first pressing frame, the fixed end of the first pressing drive is mounted on the top of the first pressing frame, the driving end of the first pressing drive is connected to the first pressing member, and the first pressing drive is configured to drive the first pressing member to a high position or a low position.

[0013] The first pressing drive drives the first pressing member to a low position, so that the first pressing member abuts against the second welding part located on the upper surface of the first welding part, thereby pressing and fixing the first welding part and the second welding part on the welding positioning frame.

[0014] Furthermore, the first pressing assembly also includes a pressure platform and a pressure block. The pressure platform is mounted on the first pressing frame, and the pressure block is mounted on the first pressing component. When the first sheet metal component is located on the first positioning platform, the side of the first sheet metal component abuts against the upper surface of the pressure platform. When the first pressing component is in a low position, the pressure block presses against the upper surface of the side of the first sheet metal component, thereby cooperating with the pressure platform to press and fix the side of the first sheet metal component.

[0015] Furthermore, the first pressing component is provided with a first detection component, the detection end of the first detection component is positioned downwards and directly above the second sheet metal component, and the first detection component is configured to detect whether bolts are pre-installed on the second sheet metal component when the first pressing component is in a low position.

[0016] Furthermore, the second pressing assembly includes a second pressing frame, a second pressing drive, and a second pressing member, wherein:

[0017] The second pressing frame is vertically mounted on the base, the second pressing member is vertically mounted on the second pressing frame, the fixed end of the second pressing drive is mounted on the top of the second pressing frame, the driving end of the second pressing drive is connected to the second pressing member, and the second pressing drive is configured to drive the second pressing member to a high position or a low position.

[0018] The second pressing drive drives the second pressing member to a low position so that the second pressing member presses against the second sheet metal part, thereby pressing and fixing the second sheet metal part on the second positioning stage.

[0019] Furthermore, the second pressing component includes a pressing plate, a first guide pin, and a second guide pin. The pressing plate is connected to the driving end of the second pressing drive component. The first guide pin and the second guide pin are respectively disposed at both ends of the pressing plate along the length direction. Guide holes are respectively provided on the second sheet metal part corresponding to the first guide pin and the second guide pin. When the second pressing component is in a low position, the first guide pin and the second guide pin are respectively inserted into the corresponding guide holes.

[0020] Furthermore, the pressing plate is provided with a second detection element, the detection end of the second detection element is positioned towards the second sheet metal part, and the second detection element is configured to detect whether a nut is pre-installed on the second sheet metal part when the second pressing plate is in a low position.

[0021] Secondly, a welding workstation is provided, the welding workstation including a welding robot and the aforementioned high-stability welding positioning mechanism for automotive sheet metal parts, the welding robot being disposed on one side of the base, the welding robot being configured to perform welding on the fixed first welding part and the second welding part.

[0022] Compared with existing technologies, the advantages of the aforementioned high-stability welding positioning mechanism and welding workstation for automotive sheet metal parts are as follows:

[0023] 1) Through the cooperation of the first positioning component, the second positioning component, the first pressing component, and the second pressing component, the first positioning component presses and fixes the middle part of the first sheet metal part located on the first positioning platform, the second positioning component presses and fixes the corresponding second sheet metal part located on the second positioning platform, the first pressing component presses and fixes the first welding part and the second welding part on the welding positioning frame while fixing the first sheet metal part, and the second pressing component presses and fixes the second sheet metal part at the bottom of the first sheet metal part while pressing and fixing the second sheet metal part on the second positioning platform. This achieves multiple fixation of the first sheet metal part and the second sheet metal part, avoids the shaking of the first sheet metal part and the second sheet metal part during welding, and improves the welding quality.

[0024] 2) Through the cooperation of the first pressing frame, the first pressing drive, the first pressing component, the pressure bearing platform and the pressure block, the first pressing drive drives the first pressing component to the low position. While pressing and fixing the first welding part and the second welding part on the welding positioning frame, the pressure block is also pressed against the upper surface of the side of the first sheet metal part. In turn, the pressure bearing platform is used to press and fix the side of the first sheet metal part, which greatly improves the stability of pressing. Attached Figure Description

[0025] To more clearly illustrate and understand the technical solutions in the embodiments of this utility model, the accompanying drawings used in the background technology and embodiment description of this utility model will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0026] Figure 1 This is a three-dimensional structural schematic diagram of the high-stability welding positioning mechanism for automotive sheet metal parts provided in this embodiment of the utility model;

[0027] Figure 2 This is a front view schematic diagram of the high-stability welding positioning mechanism for automotive sheet metal parts provided in this embodiment of the utility model;

[0028] Figure 3This is a side view schematic diagram of the high-stability welding positioning mechanism for automotive sheet metal parts provided in this embodiment of the utility model;

[0029] Figure 4 This is another three-dimensional structural schematic diagram of the high-stability welding positioning mechanism for automotive sheet metal parts provided in this embodiment of the utility model;

[0030] Figure 5 This is a three-dimensional structural diagram of the first and second sheet metal parts after welding, provided in an embodiment of this utility model. Detailed Implementation

[0031] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0032] To facilitate understanding of this utility model, a more complete description of it will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model. It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there may be an intermediate component. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of this utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] Firstly, a highly stable welding positioning mechanism for automotive sheet metal parts is provided; please refer to [link / reference]. Figures 1 to 5As shown, in this embodiment, a high-stability welding positioning mechanism for automotive sheet metal parts includes a base 10 and two sets of positioning parts 20 disposed on the base 10. The two sets of positioning parts 20 are spaced apart on the base 10. Each set of positioning parts 20 includes a first positioning frame 30, a second positioning frame 40, a welding positioning frame 50, a first positioning component 60, a second positioning component 70, a first pressing component 80, and a second pressing component 90. A first positioning platform 31 is disposed on the first positioning frame 30. The two first positioning platforms 31 are configured to jointly support a first sheet metal part 11. The two ends of the first sheet metal part 11 along its length are respectively placed on the two first positioning platforms 31. A first positioning component 60 is disposed on the first positioning frame 30. The first positioning component 60 is configured to press and fix the middle part of the first sheet metal part 11 located on the first positioning platform 31. A second positioning platform 41 is disposed on the second positioning frame 40. Each second positioning platform 41 is configured to support one... The second sheet metal part 12 and the second positioning component 70 are disposed on the second positioning frame 40. The second positioning component 70 is configured to press and fix the corresponding second sheet metal part 12 located on the second positioning table 41. The first sheet metal part 11 has a first welding part 110 extending outward from both ends along the width direction. Each second sheet metal part 12 has a second welding part 120. The welding positioning frame 50 is configured to support the first welding part 110 and the second welding part 120. The first pressing component 80 is disposed on one side of the first positioning frame 30. The first pressing component 80 is configured to press and fix the first welding part 110 and the second welding part 120 on the welding positioning frame 50 while fixing the first sheet metal part 11. The second pressing component 90 is disposed on one side of the second positioning table 41. The second pressing component 90 is configured to press and fix the second sheet metal part 12 on the bottom of the first sheet metal part 11 while pressing and fixing the second sheet metal part 12 on the second positioning table 41.

[0034] As can be seen, through the cooperation of the first positioning component 60, the second positioning component 70, the first pressing component 80, and the second pressing component 90, the first positioning component 60 presses and fixes the middle part of the first sheet metal part 11 located on the first positioning table 31, the second positioning component 70 presses and fixes the corresponding second sheet metal part 12 located on the second positioning table 41, the first pressing component 80 presses and fixes the first welding part 110 and the second welding part 120 on the welding positioning frame 50 while fixing the first sheet metal part 11, and the second pressing component 90 presses and fixes the second sheet metal part 12 at the bottom of the first sheet metal part 11 while pressing and fixing the second sheet metal part 12 on the second positioning table 41. This achieves multiple fixation of the first sheet metal part 11 and the second sheet metal part 12, avoids the shaking of the first sheet metal part 11 and the second sheet metal part 12 during welding, and improves the welding quality.

[0035] It should be noted that during welding, the two second sheet metal parts 12 need to be welded to the two preset positions of the first sheet metal part 11 respectively. The first sheet metal part 11 includes a first side plate 112, a second side plate 113 and a base plate 114. The first end of the second side plate 113 is connected to the base plate 114, and the second end of the second side plate 113 is bent away from the first side plate 112. The base plate 114 is provided with a first positioning hole 111. The second sheet metal part 12 includes a sheet metal part body and a welding plate. The sheet metal part body is provided with a first clearance hole 123, a second positioning hole 121 and two second clearance holes 124. A nut 126 is provided at the first clearance hole 123 and bolts 125 are respectively passed through the two second clearance holes 124.

[0036] In one implementation, the first positioning component 60 includes a first positioning pin 61, which is vertically mounted on the first positioning platform 31. The top of the first positioning pin 61 passes through the first positioning platform 31. The bottom of the first sheet metal part 11 has a first positioning hole 111. The top of the first positioning pin 61 is adapted to the first positioning hole 111. When the first sheet metal part 11 is placed on the first positioning platform 31, the top of the first positioning pin 61 is inserted into the first positioning hole 111, thereby positioning the first sheet metal part 11.

[0037] In one embodiment, the second positioning component 70 includes a second positioning pin 62, which is vertically mounted on the second positioning platform 41. The top of the second positioning pin 62 passes through the second positioning platform 41. The bottom of the second sheet metal part 12 has a second positioning hole 121. The top of the second positioning pin 62 is adapted to the second positioning hole 121. When the first sheet metal part 11 is placed on the second positioning platform 41, the top of the second positioning pin 62 is inserted into the second positioning hole 121, thereby positioning the second sheet metal part 12.

[0038] As can be seen, by setting the first positioning component 60 as the first positioning pin 61 and the second positioning component 70 as the second positioning pin 62, the accurate positioning of the first sheet metal part 11 and the second sheet metal part 12 is achieved, providing a positioning component with a simple structure and good positioning effect.

[0039] In one embodiment, the first pressing assembly 80 includes a first pressing frame 81, a first pressing drive 82, and a first pressing member 83, wherein: the first pressing frame 81 is vertically mounted on the base 10, the first pressing member 83 is vertically mounted on the first pressing frame 81, the fixed end of the first pressing drive 82 is mounted on the top of the first pressing frame 81, and the driving end of the first pressing drive 82 is connected to the first pressing member 83. The first pressing drive 82 is configured to drive the first pressing member 83 to a high position or a low position; the first pressing drive 82 drives the first pressing member 83 to a low position, so that the first pressing member 83 abuts against the second welding part 120 located on the upper surface of the first welding part 110, thereby pressing and fixing the first welding part 110 and the second welding part 120 onto the welding positioning frame 50.

[0040] In one embodiment, the first pressing assembly 80 further includes a pressure table 84 and a pressing block 85. The pressure table 84 is mounted on the first pressing frame 81, and the pressing block 85 is mounted on the first pressing member 83. When the first sheet metal member 11 is located on the first positioning table 31, the side of the first sheet metal member 11 abuts against the upper end surface of the pressure table 84. When the first pressing member 83 is in a low position, the pressing block 85 presses against the upper surface of the side of the first sheet metal member 11, thereby cooperating with the pressure table 84 to press and fix the side of the first sheet metal member 11.

[0041] As can be seen, through the cooperation of the first pressing frame 81, the first pressing drive 82, the first pressing part 83, the pressure platform 84 and the pressing block 85, the first pressing drive 82 drives the first pressing part 83 to a low position. While pressing and fixing the first welding part 110 and the second welding part 120 onto the welding positioning frame 50, the pressing block 85 is also pressed against the upper surface of the side of the first sheet metal part 11. In turn, the pressure platform 84 is used to press and fix the side of the first sheet metal part 11, which greatly improves the stability of pressing.

[0042] In one embodiment, a first detection element 86 is provided on the first pressing member 83. The detection end of the first detection element 86 is arranged downward and located directly above the second sheet metal part 12. The first detection element 86 is configured to detect whether the bolts 125 are pre-installed on the second sheet metal part 12 when the first pressing member 83 is in a low position.

[0043] As can be seen, by setting the first detection component 86, the detection of whether the bolts 125 are pre-installed on the second sheet metal part 12 is realized, which simplifies the welding procedure and improves the efficiency of subsequent welding.

[0044] In one embodiment, the second pressing assembly 90 includes a second pressing frame 91, a second pressing drive 92, and a second pressing member 93, wherein: the second pressing frame 91 is vertically mounted on the base 10, the second pressing member 93 is movably mounted on the second pressing frame 91, the fixed end of the second pressing drive 92 is mounted on the top of the second pressing frame 91, and the driving end of the second pressing drive 92 is connected to the second pressing member 93. The second pressing drive 92 is configured to drive the second pressing member 93 to a high position or a low position; the second pressing drive 92 drives the second pressing member 93 to a low position so that the second pressing member 93 presses against the second sheet metal part 12, thereby pressing and fixing the second sheet metal part 12 onto the second positioning table 41.

[0045] Specifically, the first pressing drive 82 and the second pressing drive 92 can be electric cylinders, pneumatic cylinders or other linear modules with similar functions.

[0046] In one embodiment, the second pressing member 93 includes a pressing plate 930, a first guide pin 931, and a second guide pin 932. The pressing plate 930 is connected to the driving end of the second pressing drive member 92. The first guide pin 931 and the second guide pin 932 are respectively disposed at both ends of the pressing plate 930 along the length direction. Guide holes 122 are respectively provided on the second sheet metal part 12 corresponding to the first guide pin 931 and the second guide pin 932. When the second pressing member 93 is in a low position, the first guide pin 931 and the second guide pin 932 are respectively inserted into the corresponding guide holes 122.

[0047] In one embodiment, a second detection element 94 is provided on the pressing plate 930. The detection end of the second detection element 94 is positioned toward the second sheet metal part 12. The second detection element 94 is configured to detect whether a nut 126 is pre-installed on the second sheet metal part 12 when the second pressing plate 93 is in a low position.

[0048] As can be seen, by setting the second inspection component 94, it is possible to detect whether the nut 126 is pre-installed on the second sheet metal part 12 without the need to add an additional inspection mechanism, thereby improving the efficiency of subsequent welding and saving the overall equipment cost.

[0049] Secondly, based on the aforementioned high-stability welding positioning mechanism for automotive sheet metal parts, a welding workstation is provided. The welding workstation includes a welding robot and the aforementioned high-stability welding positioning mechanism for automotive sheet metal parts. The welding robot is disposed on one side of the base 10 and is configured to perform welding on the fixed first welding part 110 and the second welding part 120.

[0050] When the aforementioned high-stability welding positioning mechanism for automotive sheet metal parts is in operation: First, a manual or robotic arm places the first sheet metal part 11 on the first positioning table 31, so that the top of the first positioning pin 61 is inserted into the first positioning hole 111 to position the first sheet metal part 11; second, two second sheet metal parts 12 are placed on their corresponding first sheet metal parts 11, so that the top of the second positioning pin 62 is inserted into the second positioning hole 121 to position the second sheet metal parts 12; then, the first pressing drive 82 drives the first pressing member 83 to a low position, so that the first pressing member 83 abuts against the second welding part 120 located on the upper surface of the first welding part 110, thereby positioning the first welding part 11. The first welding part 110 and the second welding part 120 are pressed and fixed on the welding positioning frame 50. At the same time, the pressure block 85 presses against the upper surface of the side of the first sheet metal part 11, and cooperates with the pressure table 84 to press and fix the side of the first sheet metal part 11. The second pressing drive 92 drives the second pressing part 93 to a low position, so that the second pressing part 93 presses against the second sheet metal part 12, and presses and fixes the second sheet metal part 12 on the second positioning table 41. Finally, the welding robot performs the first welding on the first welding part 110 and the second welding part 120. After the first welding is completed, the second welding is performed on the bottom contact part between the second sheet metal part 12 and the first sheet metal part 11.

[0051] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above examples. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A highly stable welding positioning mechanism for automotive sheet metal parts, characterized in that, The high-stability welding positioning mechanism for automotive sheet metal parts includes a base and two sets of positioning parts disposed on the base, wherein: Two sets of positioning parts are spaced apart on the base. Each set of positioning parts includes a first positioning frame, a second positioning frame, a welding positioning frame, a first positioning component, a second positioning component, a first pressing component, and a second pressing component. The first positioning frame is provided with a first positioning platform. The two first positioning platforms are configured to jointly support a first sheet metal part. The two ends of the first sheet metal part along its own length are respectively placed on the two first positioning platforms. The first positioning component is provided on the first positioning frame and is configured to press and fix the middle part of the first sheet metal part located on the first positioning platform. The second positioning frame is provided with a second positioning platform. Each second positioning platform is configured to support a second sheet metal part. The second positioning component is provided on the second positioning frame and is configured to press and fix the corresponding second sheet metal part located on the second positioning platform. The first sheet metal part has a first welded portion extending outward from both ends along its width direction. Each second sheet metal part has a second welded portion. The welding positioning frame is configured to support the first welded portion and the second welded portion. The first pressing assembly is disposed on one side of the first positioning frame. The first pressing assembly is configured to press and fix the first welded portion and the second welded portion on the welding positioning frame while fixing the first sheet metal part. The second pressing assembly is disposed on one side of the second positioning table. The second pressing assembly is configured to press and fix the second sheet metal part to the bottom of the first sheet metal part while pressing and fixing the second sheet metal part on the second positioning table.

2. The high-stability welding positioning mechanism for automotive sheet metal parts according to claim 1, characterized in that, The first positioning component includes a first positioning pin, which is vertically mounted on the first positioning platform. The top of the first positioning pin passes through the first positioning platform. The bottom of the first sheet metal part has a first positioning hole. The top of the first positioning pin is adapted to the first positioning hole. When the first sheet metal part is placed on the first positioning platform, the top of the first positioning pin is inserted into the first positioning hole, thereby positioning the first sheet metal part.

3. The high-stability welding positioning mechanism for automotive sheet metal parts according to claim 1, characterized in that, The second positioning component includes a second positioning pin, which is vertically mounted on the second positioning platform. The top of the second positioning pin passes through the second positioning platform. The bottom of the second sheet metal part has a second positioning hole. The top of the second positioning pin is adapted to the second positioning hole. When the first sheet metal part is placed on the second positioning platform, the top of the second positioning pin is inserted into the second positioning hole, thereby positioning the second sheet metal part.

4. The high-stability welding positioning mechanism for automotive sheet metal parts according to claim 1, characterized in that, The first pressing assembly includes a first pressing frame, a first pressing drive, and a first pressing member, wherein: The first pressing frame is vertically mounted on the base, the first pressing member is vertically mounted on the first pressing frame, the fixed end of the first pressing drive is mounted on the top of the first pressing frame, the driving end of the first pressing drive is connected to the first pressing member, and the first pressing drive is configured to drive the first pressing member to a high position or a low position. The first pressing drive drives the first pressing member to a low position, so that the first pressing member abuts against the second welding part located on the upper surface of the first welding part, thereby pressing and fixing the first welding part and the second welding part on the welding positioning frame.

5. The high-stability welding positioning mechanism for automotive sheet metal parts according to claim 4, characterized in that, The first pressing assembly further includes a pressure platform and a pressure block. The pressure platform is mounted on the first pressing frame, and the pressure block is mounted on the first pressing component. When the first sheet metal component is located on the first positioning platform, the side of the first sheet metal component abuts against the upper surface of the pressure platform. When the first pressing component is in a low position, the pressure block presses against the upper surface of the side of the first sheet metal component, thereby cooperating with the pressure platform to press and fix the side of the first sheet metal component.

6. The high-stability welding positioning mechanism for automotive sheet metal parts according to claim 4, characterized in that, The first pressing component is provided with a first detection component. The detection end of the first detection component is set downward and located directly above the second sheet metal component. The first detection component is configured to detect whether bolts are pre-installed on the second sheet metal component when the first pressing component is in a low position.

7. The high-stability welding positioning mechanism for automotive sheet metal parts according to claim 1, characterized in that, The second pressing assembly includes a second pressing frame, a second pressing drive, and a second pressing member, wherein: The second pressing frame is vertically mounted on the base, the second pressing member is vertically mounted on the second pressing frame, the fixed end of the second pressing drive is mounted on the top of the second pressing frame, the driving end of the second pressing drive is connected to the second pressing member, and the second pressing drive is configured to drive the second pressing member to a high position or a low position. The second pressing drive drives the second pressing member to a low position so that the second pressing member presses against the second sheet metal part, thereby pressing and fixing the second sheet metal part on the second positioning stage.

8. The high-stability welding positioning mechanism for automotive sheet metal parts according to claim 7, characterized in that, The second pressing component includes a pressing plate, a first guide pin, and a second guide pin. The pressing plate is connected to the driving end of the second pressing drive component. The first guide pin and the second guide pin are respectively disposed at both ends of the pressing plate along the length direction. Guide holes are respectively provided on the second sheet metal part corresponding to the first guide pin and the second guide pin. When the second pressing component is in a low position, the first guide pin and the second guide pin are respectively inserted into the corresponding guide holes.

9. The high-stability welding positioning mechanism for automotive sheet metal parts according to claim 8, characterized in that, The pressing plate is provided with a second detection element, the detection end of the second detection element is set towards the second sheet metal part, and the second detection element is configured to detect whether a nut is pre-installed on the second sheet metal part when the second pressing plate is in a low position.

10. A welding workstation, characterized in that, The welding workstation includes a welding robot and a high-stability welding positioning mechanism for automotive sheet metal parts as described in any one of claims 1 to 9. The welding robot is disposed on one side of the base and is configured to perform welding on the fixed first welding part and the second welding part.

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