Clamping tool for clamping workpiece on box body and welding tool

Abstract

The utility model provides a clamping tool and a welding tool for clamping a workpiece on a box body, and the clamping tool for clamping the workpiece on the box body comprises a base station, a clamping mechanism, a clamping mechanism and a welding mechanism, the overturning table is provided with an avoiding opening; the box body positioning structure is arranged on the mounting surface of the overturning table and located on the circumferential outer side of the avoiding opening; the first workpiece placing seat is movably arranged on the mounting surface of the overturning table in the horizontal direction, a first abutting structure is arranged on the first workpiece placing seat, a first workpiece mounting groove is formed in the outer side surface of the first abutting structure, and a first welding point avoiding hole communicating with the first workpiece mounting groove is formed in the inner side surface of the first abutting structure; the first driving structure is in driving connection with the first workpiece placing seat; and the turnover driving structure and the first driving structure are in electric control connection with the control device. By means of the technical scheme, the problems that in the prior art, the welding efficiency and the welding quality are low when workpieces are welded on the inner side surface of a box body can be effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of processing frock, specifically, relate to a kind of clamping frock and welding frock for clamping workpiece on box. BACKGROUND

[0002] Traditional welding frock design mainly focuses on welding workpiece on the outer surface of box, which simplifies the welding process to some extent, and facilitates the positioning and operation of welding robot. However, when the welding demand turns to the inner surface of box, the existing frock design is not satisfactory. Due to the limited internal space of box, the welding robot is difficult to directly contact the combined part of workpiece and box, which makes it difficult to achieve automatic welding. In this scenario, manual welding is often required, which not only increases labor costs and reduces production efficiency, but also makes it difficult to ensure consistent welding quality due to the instability of manual operation. Especially in situations that require high-precision and high-quality welding, the limitations of manual welding are more prominent, which can easily result in welding defects such as uneven welds and insufficient strength, which directly affects the performance and service life of the box.

[0003] Therefore, there is an urgent need for a new clamping frock that can effectively solve the problem of automatic welding of workpieces on the inner surface of the box, to improve welding efficiency, ensure welding quality, reduce production costs, and reduce dependence on manual operation, to meet the needs of modern automated production lines. SUMMARY

[0004] The main purpose of the utility model is to provide a clamping frock and welding frock for clamping workpiece on box, to solve the problem of low welding efficiency and welding quality in existing technology when welding workpiece on the inner surface of the box.

[0005] To achieve the above purpose, according to one aspect of the utility model, a clamping frock for clamping workpiece on box is provided, comprising: a base; a turnover table, which is reversibly arranged on the base through a turnover driving structure, and is provided with an avoiding opening; a box positioning structure, which is arranged on the mounting surface of the turnover table and located on the circumferential outside of the avoiding opening, for supporting and positioning the opening of the box; a first workpiece placing seat, which is movably arranged on the mounting surface of the turnover table in horizontal direction, and has a first abutting structure on the first workpiece placing seat, which can abut with the inner surface of the side wall of the box, a first workpiece mounting groove is arranged on the outside of the first abutting structure, and a first welding point avoiding hole is arranged on the inside of the first abutting structure, which is communicated with the first workpiece mounting groove; a first driving structure, which is drivingly connected with the first workpiece placing seat, to move the first workpiece placing seat between the abutting position abutting with the side wall of the box and the avoiding position away from the side wall of the box; a control device, the turnover driving structure and the first driving structure are electrically connected with the control device.

[0006] In an embodiment, the clamping tool further comprises: a first clamping structure arranged on the mounting surface of the turnover table, the first clamping structure being located outside the first abutting structure and opposite to the first workpiece mounting groove, the first clamping structure comprising a first clamping head and a second driving structure for driving the first clamping head to move horizontally, the first clamping head having a first clamping surface on the outer surface of the side wall of the clamping box body, and the second driving structure being electrically connected to the control device.

[0007] In an embodiment, the first clamping structure is arranged on the turnover table through a first workpiece placing seat.

[0008] In an embodiment, the first workpiece placing seat, the corresponding first driving structure and the corresponding first clamping structure constitute a side clamping assembly, and the clamping tool comprises a plurality of side clamping assemblies.

[0009] In an embodiment, the clamping tool further comprises: a second workpiece placing seat arranged on the mounting surface of the turnover table, the second workpiece placing seat having a second abutting structure capable of abutting against the inner surface of the bottom wall of the box body, the second workpiece mounting groove being arranged on the upper surface of the second abutting structure, and the second welding point avoiding hole being arranged on the lower surface of the second abutting structure and communicating with the second workpiece mounting groove.

[0010] In an embodiment, the clamping tool further comprises: a second clamping structure arranged on the mounting surface of the turnover table, the second clamping structure comprising a second clamping head and a third driving structure for driving the second clamping head to move vertically, the second clamping head being located above the second abutting structure and opposite to the second workpiece mounting groove, the second clamping head having a second clamping surface on the upper surface of the bottom wall of the clamping box body, and the third driving structure being electrically connected to the control device.

[0011] In an embodiment, the third driving structure is a rotary pressing cylinder, the output end of the rotary pressing cylinder being drivingly connected to the second clamping head, so that the second clamping head has a preparation position located above the second abutting structure and an avoiding position away from the position directly above the second abutting structure.

[0012] In an embodiment, the second workpiece placing seat and the corresponding second clamping structure constitute a bottom clamping assembly, and the clamping tool comprises a plurality of bottom clamping assemblies.

[0013] In an embodiment, the turnover table has a plurality of welding stations, each welding station corresponding to a set of avoiding holes.

[0014] According to another aspect of the utility model, a kind of welding tool that workpiece is welded on box, comprising: clamping tool, clamping tool is the clamping tool described above that workpiece is clamped on box, the turnover platform of clamping tool has installation face upward installation position and welding position of installation face downward;Welding manipulator, in the case where the turnover platform of clamping tool is located in welding position, welding manipulator welds box and workpiece.

[0015] The utility model discloses a technical scheme, workpiece clamping tool on box, effectively solve the problem of automatic welding of the inside surface workpiece of box by its unique design.First, the first abutment structure on the first workpiece seat can be attached to the inside surface of the side wall of box, ensure the stability of welding process and the consistency of welding quality, reduce the generation of welding defects.Second, by setting the turnover platform that can overturn on base and the avoidance mouth and box positioning structure set on the turnover platform, the position of box can be flexibly adjusted, on the one hand, it is convenient for user to place box on clamping tool, on the other hand, make welding manipulator can be unobstructed into the inside of box.Further, by the first welding point avoidance hole on the first abutment structure, welding manipulator can be welded to the combined part of the inside surface of box and workpiece, realize automatic welding, greatly improve the welding efficiency, reduce the dependence on manual welding.In addition, by the electric control connection of control device to turnover drive structure and first drive structure, realize the automatic positioning and clamping of workpiece and box, further reduce the demand of manual operation, reduce labor cost, improve the automation level of production line.

[0016] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages. The utility model will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings accompanying the specification of the utility model form a part of the utility model and serve to provide further understanding of the utility model, and the illustrative embodiments of the utility model and their descriptions serve to explain the utility model, and do not constitute improper limitation on the utility model. In the drawings:

[0018] Figure 1 The structure schematic diagram of the embodiment of the clamping tool that workpiece is clamped on box according to the utility model is shown, wherein the turnover platform of clamping tool is located in installation position;

[0019] Figure 2 The enlarged structure schematic diagram of the place A of the clamping tool of Figure 1 ;

[0020] Figure 3 The enlarged structure schematic diagram of the place B of the clamping tool of Figure 2 ;

[0021] Figure 4 An enlarged structural schematic view of C of the clamping tool of Figure 2

[0022] Figure 5 An enlarged structural schematic view of D of the clamping tool of Figure 1

[0023] Figure 6 An enlarged structural schematic view of D of the clamping tool of Figure 5

[0024] Figure 7 A three-dimensional structural schematic view of a welding tool for welding a workpiece on a box according to the present application is shown.

[0025] Among them, the above-mentioned drawings include the following reference signs:

[0026] 1, box; 2, workpiece; 10, base; 20, turnover table; 21, avoiding opening; 22, mounting surface; 30, box positioning structure; 40, first workpiece placing seat; 41, first abutting structure; 411, first workpiece mounting groove; 412, first welding point avoiding hole; 50, first driving structure; 60, first tightening structure; 61, first tightening head; 611, first tightening surface; 62, second driving structure; 70, side clamping assembly; 80, second workpiece placing seat; 81, second abutting structure; 811, second workpiece mounting groove; 812, second welding point avoiding hole; 90, second tightening structure; 91, second tightening head; 911, second tightening surface; 92, third driving structure; 100, bottom clamping assembly; 110, clamping tool; 120, welding manipulator. DETAILED DESCRIPTION

[0027] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0028] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings and in combination with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0029] ​​​It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate for the embodiments of the utility model described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0030] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] like Figures 1 to 6 As shown, in this embodiment, the clamping fixture for clamping the workpiece onto the housing includes: a base 10, a tilting table 20, a housing positioning structure 30, a first workpiece placement seat 40, a first driving structure 50, and a control device. The tilting table 20 is rotatably mounted on the base 10 via the tilting driving structure, and has a clearance opening 21. The housing positioning structure 30 is mounted on the mounting surface 22 of the tilting table 20 and located circumferentially outside the clearance opening 21, used to support and position the opening of the housing 1. The first workpiece placement seat 40 is movably mounted on the mounting surface 22 of the tilting table 20 in a horizontal direction. The first workpiece placement seat 40 has a first abutment structure 41 that can abut against the inner surface of the side wall of the housing 1. A first workpiece mounting groove 411 is provided on the outer surface of the first abutment structure 41, and a first welding point clearance hole 412 communicating with the first workpiece mounting groove 411 is provided on the inner surface of the first abutment structure 41. The first drive structure 50 is drivenly connected to the first workpiece placement seat 40, so that the first workpiece placement seat 40 moves between an abutting position against the side wall of the housing 1 and a clearance position away from the side wall of the housing 1. Both the flipping drive structure and the first drive structure 50 are electrically connected to the control device.

[0032] The technical scheme of the embodiment is applied, the workpiece is clamped on the clamping tool of the box body, and the unique design of the clamping tool effectively solves the problem of automatic welding of the workpiece on the inner side surface of the box body. First, the first abutting structure 41 on the first workpiece placing seat 40 can adhere the workpiece 2 to the inner surface of the side wall of the box body 1, ensuring the stability of the welding process and the consistency of the welding quality, and reducing the generation of welding defects. Second, by providing the reversible turnover table 20 on the base 10 and the avoidance opening 21 and the box positioning structure 30 on the turnover table 20, the position of the box body 1 can be flexibly adjusted, on the one hand, the user can place the box body 1 on the clamping tool, and on the other hand, the welding manipulator can enter the inside of the box body without obstacles. Further, the first welding point avoidance hole 412 on the first abutting structure 41 enables the welding manipulator to weld the combined part of the inner side surface of the box body and the workpiece, realizing automatic welding, greatly improving the welding efficiency and reducing the dependence on manual welding. In addition, the electric control connection of the turnover driving structure and the first driving structure 50 by the control device realizes the automatic positioning and clamping of the workpiece 2 and the box body 1, further reduces the demand for manual operation, reduces the labor cost, and improves the automation level of the production line.

[0033] In summary, the clamping tool provided by the embodiment not only can adapt to the needs of modern automatic production lines, improve production efficiency and welding quality, but also through the flexible turnover and precise clamping design, realizes the automatic welding of the workpiece on the inner side surface of the box body, effectively solves the limitations of the traditional welding tool when welding on the inner side of the box body, and provides a new solution for precision welding.

[0034] As shown in Figures 1 to 6 In the embodiment, the clamping tool further comprises a first tightening structure 60, the first tightening structure 60 is arranged on the mounting surface 22 of the turnover table 20, the first tightening structure 60 is located outside the first abutting structure 41 and opposite to the first workpiece mounting groove 411, the first tightening structure 60 comprises a first tightening head 61 and a second driving structure 62 for driving the first tightening head 61 to move horizontally, the first tightening head 61 has a first tightening surface 611 for tightly pressing the outer surface of the side wall of the box body 1, and the second driving structure 62 is electrically connected with the control device. Through the arrangement of the first tightening structure 60, the tightness of the workpiece and the box body is further enhanced, which is suitable for welding operations that require high-precision positioning, especially when processing irregular-shaped or large-sized workpieces, the welding quality and production efficiency can be significantly improved. For example, when processing large industrial containers or precise electronic equipment housings, the addition of the first tightening structure 60 can effectively prevent the workpiece 2 from separating from the box body 1, resulting in poor welding effect.

[0035] In other embodiments not shown in the drawings, the first clamping structure 60 is arranged on the turnover table 20 through the first workpiece placing seat 40. The above structure makes the distance between the arrangement position of the first clamping structure 60 and the side wall of the box body 1 smaller, thereby reducing the production cost of the first clamping structure 60.

[0036] For the case that multiple workpieces 2 need to be welded on the side surface of the box body 1, as shown in FIGS. Figure 1 and Figure 2 In the present embodiment, the first workpiece placing seat 40, the corresponding first driving structure 50 and the corresponding first clamping structure 60 constitute a side clamping assembly 70, and the clamping tool comprises multiple side clamping assemblies 70. The design of the multiple side clamping assemblies 70 enables the clamping tool to clamp multiple workpieces 2 on the side wall of the box body 1 at the same time, thereby significantly improving the production efficiency.

[0037] As shown in FIGS. Figure 1 , Figure 2 , Figures 4 to 6 In the present embodiment, the clamping tool further comprises a second workpiece placing seat 80 arranged on the mounting surface 22 of the turnover table 20, the second workpiece placing seat 80 is provided with a second abutting structure 81 capable of abutting against the inner surface of the bottom wall of the box body 1, the upper surface of the second abutting structure 81 is provided with a second workpiece mounting groove 811, and the lower surface of the second abutting structure 81 is provided with a second welding point avoiding hole 812 communicating with the second workpiece mounting groove 811. Specifically, the second abutting structure 81 on the second workpiece placing seat 80 can adhere the workpiece 2 to the inner surface of the bottom wall of the box body 1, thereby ensuring the stability of the welding process and the consistency of the welding quality, and reducing the generation of welding defects. Through the second welding point avoiding hole 812 on the second abutting structure 81, the shielding of the welding points by the clamp during the welding process is avoided, thereby ensuring that the welding robot can weld the combined part of the bottom wall of the box body and the workpiece, realizing automatic welding, greatly improving the welding efficiency and reducing the dependence on manual welding.

[0038] As shown in FIGS. Figure 1 , Figure 2 , Figures 4 to 6As shown, in the embodiment, the clamping tool further comprises: a second clamping structure 90 arranged on the mounting surface 22 of the turnover table 20, the second clamping structure 90 comprises a second clamping head 91 and a third driving structure 92 for driving the second clamping head 91 to move vertically, the second clamping head 91 is located above the second abutting structure 81 and opposite to the second workpiece mounting groove 811, the second clamping head 91 has a second clamping surface 911 for clamping the upper surface of the bottom wall of the box body 1, and the third driving structure 92 is electrically connected to the control device. Through the arrangement of the second clamping structure 90, the degree of close contact between the workpiece and the bottom wall of the box body is further enhanced, which is suitable for welding operations requiring high-precision positioning, especially when processing irregular-shaped or large-sized workpieces, the welding quality and production efficiency can be significantly improved.

[0039] As shown in Figure 1 , Figure 2 and Figure 4 , in the embodiment, the third driving structure 92 is a rotary pressing cylinder, the output end of the rotary pressing cylinder is drivingly connected to the second clamping head 91, so that the second clamping head 91 has a standby position located above the second abutting structure 81 and an avoiding position away from the position directly above the second abutting structure 81. Specifically, before the user places the box body 1 on the box body positioning structure 30, the second clamping head 91 is rotated to the avoiding position under the drive of the third driving structure 92. At this time, the second clamping head 91 is away from the position directly above the second abutting structure 81. Since the second clamping head 91 is not in the position directly above the second abutting structure 81, when the user places the box body 1, the second clamping head 91 does not affect the placement of the box body 1, so that the box body 1 can be smoothly placed on the box body positioning structure 30. When the box body 1 is placed, the third driving structure 92 rotates the second clamping head 91 back to the position directly above the second abutting structure 81 and moves the second clamping head 91 downward, so that the bottom wall of the box body 1 and the workpiece 2 are clamped between the second abutting structure 81 and the second clamping head 91. Therefore, the above structure facilitates the user to place the box body 1 on the clamping tool, thereby improving the processing efficiency. In addition, since the above-mentioned third driving structure 92 is a rotary pressing cylinder, the second clamping head 91 can be rotated and moved by one component, which simplifies the structure of the driving device and reduces the production cost.

[0040] For the case that multiple workpieces 2 need to be welded on the bottom surface of the box body 1, as shown in Figure 1 and Figure 2 , in the embodiment, the second workpiece placing seat 80 and the corresponding second clamping structure 90 constitute a bottom surface clamping assembly 100, and the clamping tool comprises multiple bottom surface clamping assemblies 100. The design of multiple bottom surface clamping assemblies 100 enables the clamping tool to clamp multiple workpieces 2 on the bottom wall of the box body 1 at the same time, which significantly improves the production efficiency.

[0041] As Figure 1 shown, in the present embodiment, the turnover table 20 has a plurality of welding stations, each corresponding to a set of escape ports 21. Specifically, the arrangement of multiple welding stations enables the device to handle multiple boxes 1 simultaneously, suitable for production lines with high output requirements, significantly improving the utilization rate and production efficiency of the device, especially when handling box-type products that require multi-surface welding, which can greatly improve production speed and welding quality, while reducing the handling and positioning time of the workpiece, further improving the automation level of the production line. The design of multiple stations enables the device to operate like an assembly line, and the boxes on each station can be welded independently without affecting the operation of other stations, which not only improves production efficiency but also reduces production costs.

[0042] As Figure 7 shown, the present application also provides a welding tool for welding a workpiece on a box. According to an embodiment of the welding tool of the present application, it comprises a clamping tool 110 and a welding manipulator 120. The clamping tool 110 is the clamping tool described above for clamping the workpiece on the box, and the turnover table 20 of the clamping tool 110 has an installation position with the installation surface 22 facing upwards and a welding position with the installation surface 22 facing downwards. When the turnover table 20 of the clamping tool 110 is in the welding position, the welding manipulator 120 welds the box 1 and the workpiece 2. Since the clamping tool 110 described above has the advantages of improving welding quality and efficiency, the welding tool with it also has the above advantages.

[0043] The relative arrangement of components and steps, numerical expressions, and numerical values set forth in the embodiments are not intended to limit the scope of the present application unless otherwise specifically stated. At the same time, it should be understood that the sizes of the various parts shown in the drawings are not drawn in proportion to the actual proportions. The techniques, methods and devices known to those skilled in the relevant art can not be discussed in detail, but in appropriate cases, the techniques, methods and devices should be considered as part of the authorized description. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0044] For purposes of the description hereinafter, spatial terms, such as "above", "below", "upper", "lower", and the like, can be used with reference to the illustrated orientation of one device or feature to another device or feature, as illustrated in the figures. It will be further understood that the spatial terms are intended to encompass different orientations of the device or feature in addition to the orientation depicted in the figures. For example, if the device or feature is inverted or rotated 90 degrees, a spatial term that would have previously described a device or feature above or below another device or feature would now be interpreted as being below or above, respectively. Accordingly, the exemplary spatial terminology used herein is for purposes of describing the examples discussed herein and is not intended to be limiting.

[0045] In the description of the present application, it is to be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship is usually based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, therefore cannot be understood as limiting the protection scope of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component.

[0046] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A clamping tool for clamping a workpiece to a box, characterized by, The clamp tool comprises: a base (10); a turnover platform (20) which is arranged on the base (10) in a turnable manner through a turnover driving structure, the turnover platform (20) is provided with an avoiding opening (21); a box positioning structure (30) which is arranged on a mounting surface (22) of the turnover platform (20) and is located on the circumferential outer side of the avoiding opening (21), and is used for supporting and positioning an opening of a box (1); a first workpiece placing seat (40) which is movably arranged on the mounting surface (22) of the turnover platform (20) in a horizontal direction, the first workpiece placing seat (40) is provided with a first abutting structure (41) which can abut against an inner surface of a side wall of the box (1), an outer side surface of the first abutting structure (41) is provided with a first workpiece mounting groove (411), and an inner side surface of the first abutting structure (41) is provided with a first welding point avoiding hole (412) which is in communication with the first workpiece mounting groove (411); a first driving structure (50) which is drivingly connected with the first workpiece placing seat (40) so as to move the first workpiece placing seat (40) between an abutting position at which the first workpiece placing seat (40) abuts against the side wall of the box (1) and an avoiding position at which the first workpiece placing seat (40) is away from the side wall of the box (1); a control device, the turnover driving structure and the first driving structure (50) are electrically connected with the control device.

2. The clamping tool of claim 1, wherein The clamp tool further comprises: a first tightening structure (60) which is arranged on the mounting surface (22) of the turnover platform (20), the first tightening structure (60) is located on the outer side of the first abutting structure (41) and is opposite to the first workpiece mounting groove (411), the first tightening structure (60) comprises a first tightening head (61) and a second driving structure (62) which drives the first tightening head (61) to move horizontally, the first tightening head (61) is provided with a first tightening surface (611) which is used for tightening an outer surface of the side wall of the box (1), and the second driving structure (62) is electrically connected with the control device.

3. The clamping tool of claim 2, wherein The first tightening structure (60) is arranged on the turnover platform (20) through the first workpiece placing seat (40).

4. The clamping tool of claim 2, wherein The first workpiece placing seat (40), the corresponding first driving structure (50) and the corresponding first tightening structure (60) constitute a side surface clamping assembly (70), and the clamp tool comprises a plurality of side surface clamping assemblies (70).

5. The clamping tool of claim 1 wherein, The clamp tool further comprises: a second workpiece placing seat (80) which is arranged on the mounting surface (22) of the turnover platform (20), the second workpiece placing seat (80) is provided with a second abutting structure (81) which can abut against an inner surface of a bottom wall of the box (1), an upper surface of the second abutting structure (81) is provided with a second workpiece mounting groove (811), and a lower surface of the second abutting structure (81) is provided with a second welding point avoiding hole (812) which is in communication with the second workpiece mounting groove (811).

6. The clamping tool of claim 5, wherein The clamp tool further comprises: A second clamping structure (90) is arranged on the mounting surface (22) of the turnover table (20), and the second clamping structure (90) comprises a second clamping head (91) and a third driving structure (92) for driving the second clamping head (91) to move vertically, the second clamping head (91) is located above the second abutting structure (81) and opposite to the second workpiece mounting groove (811), the second clamping head (91) has a second clamping surface (911) for clamping the upper surface of the bottom wall of the box (1), and the third driving structure (92) is electrically connected with the control device.

7. The clamping tool of claim 6, wherein The third driving structure (92) is a rotary pressing cylinder, the output end of the rotary pressing cylinder is drivingly connected with the second clamping head (91), so that the second clamping head (91) has a standby position located above the second abutting structure (81) and a avoiding position away from the position directly above the second abutting structure (81).

8. The clamping tool of claim 6 wherein, The second workpiece placing seat (80) and the corresponding second clamping structure (90) constitute a bottom surface clamping assembly (100), and the clamping tool comprises a plurality of bottom surface clamping assemblies (100).

9. The clamping tool of claim 1 wherein, The turnover table (20) has a plurality of welding stations, and each welding station corresponds to a group of avoiding openings (21).

10. A welding tool for welding a workpiece to a box, comprising: A clamping tool (110), characterized in that the clamping tool (110) is the clamping tool for clamping a workpiece to a box according to any one of claims 1 to 9, and the turnover table (20) of the clamping tool (110) has a mounting position with the mounting surface (22) upward and a welding position with the mounting surface (22) downward; A welding manipulator (120), which welds the box (1) and the workpiece (2) when the turnover table (20) of the clamping tool (110) is in the welding position.

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