Workpiece edge covering mechanism

Abstract

The utility model provides a workpiece edge covering mechanism. The workpiece edge covering mechanism comprises a base, a driving part arranged on the base and a push block arranged at the driving end of the driving part. Wherein the pushing block is provided with a profiling groove matched with the corner position of the workpiece, under the driving of the driving part, the pushing block can push and press the covered edge of the corner of the workpiece to a preset angle, and the arrangement position of the pushing block on the driving end is adjustable. According to the workpiece edge covering mechanism, the driving part and the pushing block arranged at the driving end of the driving part are arranged, and the profiling groove matched with the corner position of the workpiece is formed in the pushing block, so that the pushing block is driven by the driving part to push and press the covered edge of the corner of the workpiece to the preset angle, and edge covering of the corner of the workpiece is completed; the problems that a sharp corner part is uneven due to existing roller edge covering and edge covering grinding of a pressing cutter is difficult can be solved, the arrangement position of the push block on the driving end can be adjusted, the position of the push block can be conveniently adjusted on site, and the edge covering quality can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of edge wrapping equipment, and particularly relates to a workpiece edge wrapping mechanism. Background Art

[0002] At present, the automobile door covers all adopt the edge wrapping form, and the quality of edge wrapping directly affects people's feelings about the vehicle. The current mainstream edge wrapping technologies are robot roll hemming and press hemming. Among them, in robot roll hemming, the roller is pressed on the flange, and the edge wrapping is realized by the continuous forward movement of the roller rotation. This form is robot trajectory control, which has the advantages of simple debugging and recoverability. However, for the edge wrapping of the sharp corner part, because the roll hemming is a single point force of the roller, the sharp corner part is prone to uneven force and material feeding problems, which easily leads to unevenness of the sharp corner part. In press hemming, the edge wrapping is realized by making a conforming pressing tool block act on the flange of the workpiece and bending the flange. Among them, the press hemming and the workpiece are in overall line-surface contact, and there are no problems of material feeding and uneven force. However, the pressing tool needs to be ground, and there are problems such as difficult problem rectification, long debugging cycle, and inability to return to the original state after modification. Content of the Utility Model

[0003] In view of this, the utility model aims to provide a workpiece edge wrapping mechanism, which can wrap the corners of the workpiece and has better edge wrapping quality.

[0004] To achieve the above object, the technical solution of the utility model is realized as follows:

[0005] A workpiece edge wrapping mechanism is used for wrapping the corner positions of a workpiece, and it includes a base, a driving part arranged on the base, and a pushing block arranged on the driving end of the driving part;

[0006] The pushing block is provided with a profiling groove adapted to the corner position of the workpiece. Driven by the driving part, the pushing block can push the edge wrapping of the workpiece corner to a preset angle, and the arrangement position of the pushing block on the driving end is adjustable.

[0007] Further, an installation block is arranged on the driving end of the driving part. The pushing block is connected to the installation block through a first connecting piece, and one of the installation block and the pushing block is provided with a first long hole;

[0008] The first connecting piece is inserted into the first long hole, and the first long hole is horizontally arranged and perpendicular to the pushing direction of the pushing block.

[0009] Further, a second connecting piece is arranged between the pushing block and the installation block, and one of the installation block and the pushing block is provided with a second long hole;

[0010] The second connecting member is inserted into the second long slot, and the second long slot is vertically arranged and perpendicular to the pressing direction of the pushing block.

[0011] Furthermore, the first long slots are located on the pushing block and are multiple and spaced apart;

[0012] One side of the mounting block is provided with a connecting plate, the second long slots are located on the connecting plate, and the second long slots are multiple and spaced apart.

[0013] Furthermore, a plurality of first gaskets are provided between the pushing block and the mounting block, and the first connecting member passes through the first gaskets; and / or,

[0014] A plurality of second gaskets are provided between the pushing block and the connecting plate, and the second connecting member passes through the second gaskets.

[0015] Furthermore, a slide rail is provided on the base, and the driving end of the driving portion is slidably disposed on the slide rail through a slider.

[0016] Furthermore, a limiting portion is provided between the base and the slider, and the limiting portion is used to limit the sliding displacement of the slider when the pushing block presses the edge of the corner of the workpiece.

[0017] Furthermore, the limiting portion includes a limiting block provided on the base and a limiting post provided on the slider, and the limiting post abuts against the limiting block to limit the sliding displacement of the slider.

[0018] Furthermore, an installation groove is provided at the end of the slider, the limiting post is connected in the installation groove, and one end protrudes relative to the slider, and a plurality of third gaskets for adjusting the protruding amount of the limiting post are provided between the limiting post and the slider.

[0019] Furthermore, the driving portion is a cylinder provided on the base.

[0020] Compared with the prior art, the present utility model has the following advantages:

[0021] For the workpiece edge folding mechanism of the present utility model, by providing a driving portion and a pushing block provided on the driving end of the driving portion, and providing a profiling groove adapted to the corner position of the workpiece on the pushing block, thus, the pushing block can be driven by the driving portion to push the edge of the corner of the workpiece to a preset angle to complete the edge folding of the corner of the workpiece, which can solve the problems of uneven sharp corners caused by the existing roller edge folding and difficult grinding of the edge folding by the pressing knife, and the adjustable arrangement position of the pushing block on the driving end can facilitate on-site adjustment of the position of the pushing block, which is beneficial to improving the edge folding quality.

[0022] In addition, the pushing block is connected to the mounting block through the first connecting member, and a first long slot is provided on one of the mounting block and the pushing block, which can adjust the layout position of the pushing block in the horizontal direction, and has a simple structure and is convenient for design and implementation. The pushing block is connected to the mounting block through the second connecting member, and a second long slot is provided on one of the mounting block and the pushing block, which can not only improve the mounting stability of the pushing block on the mounting block, improve the edge wrapping quality, but also adjust the layout position of the pushing block in the vertical direction, and has a simple structure and is convenient for design and implementation.

[0023] Secondly, a plurality of the first long slots are arranged at intervals, and a plurality of the second long slots are arranged at intervals, which can further improve the mounting stability of the pushing block on the mounting block and is beneficial to improving the edge wrapping quality. By providing a plurality of first gaskets between the pushing block and the mounting block, after adjusting the position of the pushing block in the second direction, the abutment between the pushing block and the mounting block in the second direction can be maintained by changing the number of the first gaskets, which is beneficial to ensuring the setting stability of the pushing block after adjustment. The setting of the second gaskets can be beneficial to ensuring the stability of the pushing block after the position adjustment in the first direction.

[0024] In addition, the driving end of the driving part is slidably arranged on the slide rail through the slider, which can guide the sliding of the driving end, thereby improving the sliding smoothness of the driving end, preventing the pushing block from jamming, and being beneficial to further improving the edge wrapping quality. By providing the limiting part, the sliding displacement of the slider can be limited, and further over-pressing the workpiece can be prevented, which is beneficial to ensuring the edge wrapping quality.

[0025] In addition, the limiting part includes a limiting block arranged on the base and a limiting column arranged on the slider, which has a simple structure and is convenient for design and implementation. By providing a plurality of third gaskets for adjusting the protruding amount of the limiting column between the limiting column and the slider, the extreme displacement of the pushing block in its pushing direction can be adjusted. The driving part adopts a cylinder arranged on the base, which has a simple structure, mature technology, and is convenient for design and implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0027] Figure 1 is a schematic structural diagram of the workpiece edge wrapping mechanism according to the embodiment of the present invention;

[0028] Figure 2 is a schematic structural diagram of the workpiece edge wrapping mechanism according to the embodiment of the present invention from another perspective;

[0029] Figure 3 is a schematic structural diagram of the base of the present invention when the mounting plate is removed;

[0030] Figure 4 Partial assembly state diagram between the mounting block and the cylinder described in the embodiment of the present utility model;

[0031] Figure 5 Assembly state diagram of the mounting block and the connecting block described in the embodiment of the present utility model;

[0032] Figure 6 Assembly state diagram of the mounting block and the pushing block described in the embodiment of the present utility model;

[0033] Figure 7 Assembly state diagram of the mounting block and the pushing block from another perspective described in the embodiment of the present utility model;

[0034] Figure 8 Structural schematic diagram of the pushing block described in the embodiment of the present utility model;

[0035] Figure 9 Structural schematic diagram of the pushing block from another perspective described in the embodiment of the present utility model;

[0036] Figure 10 Structural schematic diagram of the first gasket described in the embodiment of the present utility model;

[0037] Figure 11 Assembly state diagram of the base block and the slider described in the embodiment of the present utility model;

[0038] Figure 12 Structural schematic diagram of the slider described in the embodiment of the present utility model.

[0039] Explanation of reference numerals:

[0040] 1, base; 2, cylinder; 3, mounting block; 4, pushing block; 5, slide rail; 6, limiting post; 7, connecting block; 8, connecting plate; 9, first gasket; 10, second gasket; 11, slider;

[0041] 101, base block; 102, mounting plate; 103, limiting block;

[0042] 301, counterbore; 3011, first connection hole;

[0043] 401, profiling groove; 402, first long hole;

[0044] 801, second long hole;

[0045] 1101, body part; 1102, connecting part. Detailed implementation manners

[0046] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0047] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0048] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0049] The present utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0050] This embodiment relates to a workpiece hemming mechanism, which is used to hem the corner position of a workpiece, and includes a base 1, a driving part arranged on the base 1, and a push block 4 arranged on the driving end of the driving part.

[0051] Among them, the push block 4 is provided with a profiling groove 401 adapted to the corner position of the workpiece. Driven by the driving part, the push block 4 can push the hem of the workpiece corner to a preset angle, and the arrangement position of the push block 4 on the driving end is adjustable.

[0052] The workpiece hemming mechanism of this embodiment, by setting the driving part, and the push block 4 arranged on the driving end of the driving part, and setting the profiling groove 401 adapted to the corner position of the workpiece on the push block 4, thus, the push block 4 can be driven by the driving part to push the hem of the workpiece corner to a preset angle, and the hemming of the workpiece corner can be completed, which can solve the problems of uneven sharp corners caused by the existing roller hemming and difficult grinding of the hemming with a pressing knife. And the adjustable arrangement position of the push block 4 on the driving end can facilitate the on-site adjustment of the position of the push block 4, which is beneficial to improving the hemming quality.

[0053] Based on the above overall introduction, an exemplary structure of the workpiece hemming mechanism of this embodiment refers to Figure 1 and Figure 2As shown, the profiling groove and the corner position of the workpiece mean that their shapes and included angles are the same. Additionally, as a preferred embodiment, the driving part of this embodiment uses a cylinder 2 provided on the base 1. This cylinder 2 can output linear power, with mature technology and wide application, which is convenient for design and implementation. It can be understood that in addition to using the cylinder 2, it is also feasible to use a motor that outputs linear power for the driving part.

[0054] In addition, in combination with Figure 2 and Figure 3 As shown, as a specific embodiment, the base 1 of this embodiment as a whole includes a base block 101 in the shape of a right triangle, and a mounting plate 102 provided at one end of the base block 101. Among them, the base block 101 is provided with connection holes for connecting to an external carrier, and the mounting plate 102 is detachably connected to the base block 101 and is provided with mounting holes for mounting the cylinder 2. Here, it should be noted that the structure of the base 1 is not limited to the above structure, as long as it can mount the cylinder 2 and be connected to an external carrier.

[0055] Furthermore, to facilitate the connection between the pushing block 4 and the driving end, as a preferred implementation form, a mounting block 3 is provided on the driving end of the driving part, and the pushing block 4 is connected to the mounting block 3 through a first connecting piece. And, one of the mounting block 3 and the pushing block 4 is provided with a first long hole 402, the first connecting piece is inserted into the first long hole 402, and the first long hole 402 is horizontally arranged and perpendicular to the pushing direction of the pushing block 4. In this embodiment, by providing the first long hole 402 on one of the mounting block 3 and the pushing block 4, the arrangement position of the pushing block 4 in the horizontal direction can be adjusted, and the structure is simple, which is convenient for design and implementation.

[0056] Specifically, in combination with Figures 5 to 7 As shown, the mounting block 3 of this embodiment is integrally in the shape of a "convex", and an embedding groove is provided at one end. The driving end of the cylinder 2 is provided with a connecting block 7, and the connecting block 7 is embedded in the embedding groove. Additionally, a counterbore 301 is provided at one end of the mounting block 3, and the pushing block 4 is installed on the counterbore 301 through a first connecting piece. And, as a specific embodiment, corresponding to the first long hole 402, a first connection hole 3011 is provided on the mounting block 3, and the first connection hole 3011 is specifically a threaded hole, that is, the first connecting piece of this embodiment is specifically a bolt. This setting makes the connection operation between the pushing block 4 and the mounting block 3 simple, and at the same time is convenient for adjusting the position of the pushing block 4 in the first direction.

[0057] In this embodiment, as a preferred embodiment, as shown in Figure 8 and Figure 9 As shown, the first long holes 402 are located on the pushing block 4 and are multiple and arranged at intervals. Such a design can improve the setting stability of the pushing block 4 after adjustment, which is beneficial to ensuring the hemming quality. For example, the first long holes 402 are in two columns and areFigure 8 Four are arranged in a rectangle in the middle. Of course, the quantity can be adjusted accordingly according to the design requirements. As a further implementation manner, a second connecting member is provided between the pushing block 4 and the mounting block 3, and one of the mounting block 3 and the pushing block 4 is provided with a second long hole 801. And the second connecting member is inserted into the second long hole 801, and the second long hole 801 is vertically arranged and perpendicular to the pushing direction of the pushing block 4.

[0058] Among them, as a specific embodiment, such as Figure 6 As shown in the figure, a connecting plate 8 is provided on one side of the driving end, and the second long hole 801 is located on the connecting plate 8. And the lower part of the connecting plate 8 is connected to the mounting block 3, and the upper part protrudes above the sunken platform 301. The second long hole 801 is arranged on the upper part of the connecting plate 8 to facilitate connection with the pushing block 4. In addition, as a preferred embodiment, the connecting plate 8 and the mounting block 3 are connected by bolts (not shown in the figure) in a screwed manner for easy replacement in the later stage.

[0059] In this embodiment, as a specific embodiment, corresponding to the second long hole 801, a second connecting hole is provided on the pushing block 4. The second connecting hole is specifically a threaded hole, that is, the second connecting member in this embodiment is specifically a bolt. This setting makes the connection operation between the pushing block 4 and the connecting plate 8 simple, and at the same time facilitates adjusting the position of the pushing block 4 in the second direction. In addition, as a further implementation manner, the second long holes 801 in this embodiment are multiple and arranged at intervals to improve the setting stability of the pushing block 4 after adjustment and facilitate ensuring the edge wrapping quality. For example, the second long holes 801 are Figure 6 Two arranged at intervals in the middle. Of course, the quantity can be adjusted accordingly according to the design requirements.

[0060] As a further implementation manner, such as Figure 7 As shown in the figure, a plurality of first gaskets 9 are provided between the pushing block 4 and the mounting block 3, and the first connecting member passes through the first gaskets 9. In this embodiment, by providing a plurality of first gaskets 9 between the pushing block 4 and the mounting block 3, after adjusting the position of the pushing block 4 in the second direction, by changing the quantity of the first gaskets 9, the abutting of the pushing block 4 and the mounting block 3 in the second direction can be maintained, which is conducive to ensuring the setting stability of the pushing block 4 after adjustment and thus conducive to ensuring the edge wrapping quality.

[0061] Among them, as a specific embodiment, the structure of the first gasket 9 is as Figure 10 As shown in the figure, its overall shape is rectangular and has two elongated grooves corresponding to the above two columns of first long holes 402. In addition, to improve the use effect, such as Figure 7A number of second gaskets 10 are provided between the pushing block 4 and the connecting plate 8 shown in the figure, and the second connecting member is disposed through the second gaskets 10. By providing the second gaskets 10, after adjusting the position of the pushing block 4 in the first direction, by changing the number of the second gaskets 10, the abutting connection between the pushing block 4 and the mounting block 3 in the first direction can be maintained, which is beneficial to ensuring the setting stability of the pushing block 4 after adjustment, and thus beneficial to ensuring the hemming quality. Among them, the structure of the second gasket 10 is similar to that of the first gasket 9, and will not be elaborated here.

[0062] In addition, in combination with Figure 8 and Figure 9 shown in the figure, the profiling groove 401 on the pushing block 4 can be manufactured according to the shape of the corner of the workpiece, and the above preset angle can be specifically between 45° and 60°. And, to prevent rebound after hemming, preferably, the angle between the side wall of the profiling groove 401 and the top surface of the pushing block 4 is 4° - 6° smaller than the above preset angle, and is preferably set to a difference of 5°. That is, if it is desired to hem the corner of the workpiece to the preset angle of 60°, at this time, the angle between the side wall of the profiling groove 401 and the top surface of the pushing block 4 needs to be set to 55° to avoid the angle not reaching the required value due to the rebound of the workpiece.

[0063] In addition, to ensure the hemming quality, as Figure 9 shown in the figure, preferably, the profiling groove 401 is arranged according to the profile of the corner of the workpiece within a first distance L from its corner to fit the corner of the workpiece. And after exceeding the first distance L, it is away from the corner of the workpiece to form a gap therebetween. Among them, the first distance L can usually be set to 4.8 mm - 5.2 mm, and is preferably set to 5 mm.

[0064] In this embodiment, in order to further improve the hemming quality, as a further implementation manner, a slide rail 5 is provided on the base 1, and the driving end of the driving part is slidably arranged on the slide rail 5 through a slider 11. With such a setting, the sliding of the driving end can be guided, thereby improving the sliding smoothness of the driving end, preventing the pushing block 4 from getting stuck, and being beneficial to further improving the hemming quality. As Figure 10 and Figure 11 shown in the figure, as a preferred embodiment, the slider 11 of this embodiment includes a body part 1101 and a connecting part 1102 provided on the top of the body part 1101. Among them, the body part 1101 is slidably arranged on the slide rail 5, and its reference can be set according to the conventional setting, while the connecting part 1102 is connected to the bottom of the above-mentioned mounting block 3.

[0065] At this time, in order to prevent excessive pressing of the workpiece and reduce the hemming quality, further, a limiting part is provided between the base 1 and the slider 11, and the limiting part is used to limit the sliding displacement of the slider 11 when the pushing block 4 presses the hemming of the corner of the workpiece. Among them, in combination with Figure 3 and Figure 12As shown in the figure, the limiting part includes a limiting block 103 provided on the base 1 and a limiting post 6 provided on the slider 11. The limiting post 6 abuts against the limiting block 103 to limit the sliding displacement of the slider 11.

[0066] Moreover, the limiting block 103 is specifically provided at the other end of the base block 101 relative to the above-mentioned mounting plate 102, and specifically includes a bottom part connected to the base block 101, a side part extending upward, and a groove adapted to the above-mentioned body part 1101 is provided on the side part. In addition, as a preferred embodiment, as Figure 12 As shown in the figure, an installation groove is provided at the end of the slider 11. The limiting post 6 is connected in the installation groove, and one end protrudes outward relative to the slider 11. A number of third gaskets for adjusting the outward protrusion amount of the limiting post 6 are provided between the limiting post 6 and the slider 11.

[0067] In this embodiment, by providing a number of third gaskets for adjusting the outward protrusion amount of the limiting post 6 between the limiting post 6 and the slider 11, the extreme displacement of the push block 4 in its pushing direction can be adjusted. Among them, as a specific embodiment, the limiting post 6 is provided with an external thread, and a threaded hole is provided at the bottom of the installation groove. The limiting post 6 is specifically screwed on the slider 11 for easy replacement in the later stage.

[0068] In addition, to further improve the edge wrapping quality, as a further implementation manner, as Figure 2 As shown in the figure, in the pushing direction of the push block 4, there is a first preset length L1 between the corner of the profiling groove 401 and the end of the slider 11. And this first preset length L1 is between 13 mm and 17 mm, and is preferably set to 15 mm. Thus, the slider 11 can be made to approach the stress point of the push block 4, preventing the push block 4 from deviating greatly under the reaction force of the workpiece, resulting in incomplete pressing of the workpiece. In addition, continuing to refer to Figure 2 As shown in the figure, in the second direction, there is a second preset length L2 between the bottom of the push block 4 and the top of the slider 11. This second preset length L2 is greater than 75 mm to prevent the slider 11 from interfering with other mechanisms and causing deformation of the corner of the workpiece.

[0069] The workpiece edge wrapping mechanism of this embodiment, by adopting the above structure, can use the air cylinder 2 to provide power instead of the press, and can use the slide rail 5 to stabilize the running track of the push block 4. The setting of the limiting part can prevent overpressure. In addition, the setting of the first long hole 402 and the second long hole 801 can make the push block 4 easy to adjust on site, so as to have better edge wrapping quality. Moreover, through the direct push of the push block 4, the problem of the traditional mechanism shifting in the up and down direction of the whole vehicle can be avoided. At the same time, the defects of robot roll hemming and press hemming can also be avoided. Thus, when edge wrapping the car door cover, the large surface edge wrapping can adopt the traditional roll hemming form, while the exposed sharp corner half-edge part can use the workpiece edge wrapping mechanism of this embodiment to improve the sharp corner edge wrapping quality.

[0070] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A workpiece hemming mechanism for hemming the corner positions of a workpiece, characterized in that: It includes a base (1), a driving part arranged on the base (1), and a pushing block (4) arranged on the driving end of the driving part; The pushing block (4) is provided with a profiling groove (401) adapted to the corner position of the workpiece. Driven by the driving part, the pushing block (4) can push the hemming of the workpiece corner to a preset angle, and the arrangement position of the pushing block (4) on the driving end is adjustable.

2. The workpiece hemming mechanism according to claim 1, characterized in that: An installation block (3) is arranged on the driving end of the driving part. The pushing block (4) is connected to the installation block (3) through a first connecting piece, and a first long hole (402) is arranged on one of the installation block (3) and the pushing block (4); The first connecting piece is inserted into the first long hole (402), and the first long hole (402) is horizontally arranged and perpendicular to the pushing direction of the pushing block (4).

3. The workpiece hemming mechanism according to claim 2, characterized in that: A second connecting piece is arranged between the pushing block (4) and the installation block (3), and a second long hole (801) is arranged on one of the installation block (3) and the pushing block (4); The second connecting piece is inserted into the second long hole (801), and the second long hole (801) is vertically arranged and perpendicular to the pushing direction of the pushing block (4).

4. The workpiece hemming mechanism according to claim 3, characterized in that: The first long holes (402) are located on the pushing block (4) and are multiple and spaced apart; A connecting plate (8) is arranged on one side of the installation block (3). The second long holes (801) are located on the connecting plate (8), and the second long holes (801) are multiple and spaced apart.

5. The workpiece hemming mechanism according to claim 4, characterized in that: A number of first gaskets (9) are arranged between the pushing block (4) and the installation block (3), and the first connecting piece passes through the first gaskets (9); and / or, A number of second gaskets (10) are arranged between the pushing block (4) and the connecting plate 8, and the second connecting piece passes through the second gaskets (10).

6. The workpiece hemming mechanism according to claim 1, characterized in that: A slide rail (5) is arranged on the base (1). The driving end of the driving part is slidably arranged on the slide rail (5) through a slider (11).

7. The workpiece hemming mechanism according to claim 6, characterized in that: A limiting part is arranged between the base (1) and the slider (11). The limiting part is used to limit the sliding displacement of the slider (11) when the pushing block (4) pushes the hemming of the workpiece corner.

8. The workpiece hemming mechanism according to claim 7, characterized in that: The limiting part includes a limiting block (103) provided on the base (1) and a limiting post (6) provided on the slider (11), and the limiting post (6) limits the sliding displacement of the slider (11) by abutting against the limiting block (103).

9. The workpiece hemming mechanism according to claim 8, wherein: An installation groove is provided at the end of the slider (11), the limiting post (6) is connected in the installation groove, and one end protrudes outwards relative to the slider (11), and a number of third gaskets for adjusting the protruding amount of the limiting post (6) are provided between the limiting post (6) and the slider (11).

10. The workpiece hemming mechanism according to any one of claims 1 to 9, wherein: The driving part adopts a cylinder (2) provided on the base (1).

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