A sheet metal clamping fixture with upper and lower clamping and side limiting

Abstract

This utility model discloses a sheet metal clamping fixture with upper and lower clamping and side limiting, relating to the field of sheet metal clamping technology. It includes a worktable and a mounting frame mounted on the worktable. The mounting frame consists of a vertical plate and a horizontal plate. The vertical plate is mounted on one side above the worktable, and the horizontal plate is positioned above the vertical plate and directly above the worktable. A sheet metal placement structure is also provided above the worktable. The mounting frame is equipped with a sheet metal fixing structure and a sheet metal limiting structure. This application provides a comprehensive and stable clamping force for sheet metal parts by combining upper and lower clamping with side limiting. This clamping method prevents displacement, deformation, or shaking of sheet metal parts during processing, ensuring the stability of the processing and the reliability of processing quality, and reducing the scrap rate.

Description

Technical Field

[0001] This utility model relates to the field of sheet metal clamping technology, and in particular to a sheet metal clamping fixture with upper and lower clamping and side limiting. Background Technology

[0002] Fixtures play a crucial role in sheet metal processing. They can accurately position sheet metal parts, ensuring they are in the correct position during processing and guaranteeing the accuracy of processing dimensions. At the same time, by applying clamping force evenly, they keep the sheet metal parts stable during processing, preventing deformation, thereby improving processing accuracy and product quality, as well as increasing processing efficiency and reducing scrap rate.

[0003] Because of the many types of sheet metal, sheet metal can have a wide variety of shapes. The fixtures used for sheet metal with different shapes will also be very different. For example, the car body has many curved surfaces, and its shape is generally symmetrical on both sides (such as the front or rear panel). This type of sheet metal generally cannot be processed using existing general-purpose fixtures. It requires simultaneous limiting and fixing at the middle and sides to prevent the possibility of shaking, displacement or even deformation during processing. Therefore, for this type of sheet metal, a special fixture needs to be designed to limit and fix the upper, lower and side positions of the sheet metal. Utility Model Content

[0004] This utility model provides a sheet metal clamping fixture with upper and lower clamping and side limiting to solve the problems in the background art.

[0005] The present invention adopts the following technical solution: a sheet metal clamping fixture with upper and lower clamping and side limiting, comprising a worktable and a mounting frame mounted on the worktable. The mounting frame is composed of a vertical plate and a horizontal plate. The vertical plate of the mounting frame is mounted on one side above the worktable, and the horizontal plate of the mounting frame is positioned above the vertical plate and directly above the worktable. A sheet metal placement structure is also provided above the worktable. A sheet metal fixing structure and a sheet metal limiting structure are respectively provided on the mounting frame. The working end of the sheet metal fixing structure is below the horizontal plate of the mounting frame, and the working end of the sheet metal fixing structure corresponds vertically to the sheet metal placement structure. The working ends of the sheet metal limiting structure are located on both sides below the mounting frame, and the working ends of the sheet metal limiting structure are also located on both sides of the sheet metal placement structure.

[0006] Furthermore, the sheet metal placement structure includes fixed support components and elastic support components. The fixed support components are located above the workbench and in the middle position. There are four sets of elastic support components, which are symmetrically arranged in pairs on both sides of the fixed support components. The fixed support components and the four sets of elastic support components enable the sheet metal to be stably placed on the workbench for processing.

[0007] Furthermore, the fixed support includes a fixed frame and a placement frame. The fixed frame is installed on the workbench, and the placement frame is movably installed on the upper end of the fixed frame. The fixed frame and the placement frame are connected and fixed by a fixing pin. The shape of the placement frame can be changed according to the shape of the sheet metal to be placed.

[0008] Furthermore, each set of elastic support components includes a placement rod, a spring, a support rod, and a support block. The placement rod is mounted on the worktable, the spring is disposed at the bottom end inside the placement rod, the bottom end of the support rod is slidably mounted inside the placement rod and connected to the spring, and the support block is disposed at the top end of the support rod and contacts the sheet metal. The support block has a certain degree of toughness.

[0009] Furthermore, the sheet metal fixing structure includes an electric cylinder, a movable connecting plate, a connecting frame, and a fixing block. The electric cylinder is mounted on the mounting frame. The movable connecting plate is slidably mounted on a vertical plate inside the mounting plate. One end of the movable connecting plate is located outside the mounting frame and connected to the working end of the electric cylinder. The other end of the movable connecting plate is located inside the mounting frame. The connecting frame is mounted on the other side of the movable connecting plate and is located directly above the fixing frame. The fixing block is movably mounted on the connecting frame. A fixing pin is provided between the fixing block and the connecting frame. The fixing pin can fix the fixing block on the connecting frame. The shape of the fixing block can be changed according to the shape of the sheet metal being placed.

[0010] Furthermore, the sheet metal limiting structure includes a driving component and a limiting component. The driving component is installed above the horizontal plate in the mounting frame and is located on one side of the driving electric cylinder. There are two sets of limiting components, and both sets of limiting components are connected to the working end of the driving component. The upper ends of the two sets of limiting components are symmetrically slidably arranged on both sides of the horizontal plate in the mounting frame, and the lower ends of the two sets of limiting components are symmetrically located on both sides of the fixed frame.

[0011] Furthermore, the driving component includes a drive motor, a transmission mounting frame, a bevel gear set, and threaded rods. The drive motor is mounted above the mounting frame, and the transmission mounting frame is located on one side of the drive motor on the mounting frame. The bevel gear set is rotatably disposed within the transmission mounting frame, and the bevel gear set contains three bevel gears arranged in a U-shape. One bevel gear is connected to the working end of the drive motor on the side closest to the drive motor, and the other two bevel gears are symmetrically distributed within the transmission mounting frame. There are two threaded rods, which are symmetrically disposed above the mounting frame. One end of each threaded rod is rotatably mounted on the mounting frame, and the other end of each threaded rod passes through the transmission mounting frame and is connected to a bevel gear. Each threaded rod is threadedly connected to a set of limiting members.

[0012] Furthermore, each set of limiting components includes a sliding connecting frame, a limiting connecting plate, and a limiting rod. The sliding connecting frame is slidably installed in the horizontal plate on the mounting frame, and the top end of the sliding connecting frame is threadedly connected to a threaded rod. The limiting connecting plate is installed on the bottom end of the sliding connecting frame. There are two limiting rods, which are symmetrically arranged on both sides of the bottom end of the limiting connecting plate and are spaced apart. Each limiting rod is provided with a rubber sleeve, and each limiting rod contacts the sheet metal through the rubber sleeve.

[0013] The above-mentioned technical solutions adopted in the embodiments of this utility model can achieve the following beneficial effects:

[0014] In this application, during operation, the sheet metal part is placed on the sheet metal placement structure above the workbench. This structure provides an initial positioning reference for the sheet metal part, placing it in a preset processing position. The sheet metal fixing structure is then activated, and its working end, driven by a power source, moves from below the mounting frame's horizontal plate towards the sheet metal placement structure. Through opposing movements in both vertical and horizontal directions, the sheet metal part is clamped, restricting its vertical freedom of movement and ensuring its vertical positional stability. The sheet metal limiting structure is then activated, and its working end, under power, moves from both sides below the mounting frame towards the sides of the sheet metal part on the sheet metal placement structure. Through these lateral limiting actions, the horizontal freedom of movement of the sheet metal part is restricted, preventing horizontal displacement or swaying during processing. This application provides a comprehensive and stable clamping force for the sheet metal part by combining vertical clamping with lateral limiting. This clamping method can effectively resist various external forces generated during processing, such as cutting force, impact force, and thermal deformation stress, to prevent sheet metal parts from shifting, deforming, or shaking during processing, ensuring the stability of the processing process and the reliability of processing quality, and reducing the scrap rate. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0016] Figure 1 This is a three-dimensional schematic diagram of the present invention from a first angle;

[0017] Figure 2 This is a three-dimensional schematic diagram of the present invention from a second angle;

[0018] Figure 3 This is a schematic diagram of the sheet metal placement structure in this utility model;

[0019] Figure 4This is a schematic diagram of the sheet metal limiting structure in this utility model;

[0020] Figure 5 This is a schematic diagram of the sheet metal fixing structure in this utility model.

[0021] Reference numerals in the attached drawings: 1. Workbench; 2. Mounting frame; 3. Sheet metal placement structure; 31. Fixed support; 311. Fixed frame; 312. Placement frame; 313. Fixed pin one; 32. Elastic support; 321. Placement rod; 322. Spring; 323. Support rod; 324. Support block; 4. Sheet metal fixing structure; 4. Electric cylinder; 41. Moving connecting plate; 42. Connecting frame; 43. Fixed block; 44. Fixed pin two; 45. Sheet metal limiting structure; 5. Driving component; 51. Driving motor; 511. Transmission placement frame; 512. Bevel gear set; 513. Threaded rod; 514. Limiting component; 52. Sliding connecting frame; 521. Limiting connecting plate; 522. Limiting rod; 523. Rubber sleeve; 524. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] The technical solutions provided by the various embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0024] Reference Figures 1-5 This utility model provides a sheet metal clamping fixture with side limiting and upper clamping, including a workbench 1 and a mounting frame 2 mounted on the workbench 1. The mounting frame 2 is composed of a vertical plate and a horizontal plate. The vertical plate of the mounting frame 2 is mounted on one side above the workbench 1, and the horizontal plate of the mounting frame 2 is positioned above the vertical plate and directly above the workbench 1. A sheet metal placement structure 3 is also provided above the workbench 1. A sheet metal fixing structure 4 and a sheet metal limiting structure 5 are respectively provided on the mounting frame 2. The working end of the sheet metal fixing structure 4 is below the horizontal plate of the mounting frame 2, and the working end of the sheet metal fixing structure 4 corresponds vertically to the sheet metal placement structure 3. The working ends of the sheet metal limiting structure 5 are located on both sides below the mounting frame 2, and the working ends of the sheet metal limiting structure 5 are also located on both sides of the sheet metal placement structure 3.

[0025] In this application, a sheet metal placement structure 3 is provided above the workbench 1 for placing sheet metal parts to be processed. The mounting frame 2 is provided with a sheet metal fixing structure 4 and a sheet metal limiting structure 5. The working end of the sheet metal fixing structure 4 is located below the horizontal plate of the mounting frame 2 and corresponds vertically to the sheet metal placement structure 3; the working ends of the sheet metal limiting structure 5 are located on both sides below the mounting frame 2 and on both sides of the sheet metal placement structure 3. During operation, the sheet metal part is placed on the sheet metal placement structure 3 above the workbench 1. This structure provides an initial positioning reference for the sheet metal part, placing it in a preset processing position. The sheet metal fixing structure 4 is activated, and its working end, driven by a power source, moves from below the horizontal plate of the mounting frame 2 towards the sheet metal placement structure 3. Through the opposing movements in the vertical and horizontal directions, the sheet metal part is clamped, restricting its vertical freedom of movement and ensuring the vertical positional stability of the sheet metal part. When the sheet metal limiting structure 5 is activated, its working end moves from both sides below the mounting bracket 2 toward the side of the sheet metal part on the sheet metal placement structure 3 under the action of power. Through the limiting action on both sides, the horizontal movement freedom of the sheet metal part is restricted, preventing horizontal displacement or shaking of the sheet metal part during processing.

[0026] In this application, the combination of the above structures can achieve the following effects:

[0027] Precise positioning: Through the coordinated action of sheet metal placement structure 3, sheet metal fixing structure 4, and sheet metal limiting structure 5, precise positioning of the sheet metal part in three-dimensional space (X, Y, and Z axes) is achieved. During processing, this ensures that the sheet metal part remains in a precise position, effectively reducing processing errors caused by inaccurate positioning and meeting the requirements of various high-precision sheet metal processing techniques, such as precision cutting and high-precision welding.

[0028] Stable clamping: The combination of top and bottom clamping with side limiting provides a stable clamping force for sheet metal parts from all directions. This clamping method can effectively resist various external forces generated during processing, such as cutting forces, impact forces, and thermal deformation stress, preventing sheet metal parts from shifting, deforming, or shaking during processing, ensuring the stability of the processing and the reliability of processing quality, and reducing the scrap rate.

[0029] Improved processing efficiency: The fixture features a reasonable structural design and is easy to operate. Workers can quickly and accurately place sheet metal parts on the sheet metal placement structure 3 and easily activate the sheet metal fixing structure 4 and sheet metal limiting structure 5 to complete the clamping process. Compared with traditional fixtures, it greatly reduces the time spent on manual alignment and fixing of sheet metal parts, making it particularly suitable for mass production scenarios. It can significantly improve the overall production efficiency of sheet metal processing and reduce production costs.

[0030] Preferably, the sheet metal placement structure 3 includes a fixed support 31 and an elastic support 32. The fixed support 31 is positioned above the workbench 1 and in the middle. There are four sets of elastic support 32, which are symmetrically arranged in pairs on both sides of the fixed support 31. The fixed support 31 and the four sets of elastic support 32 enable the sheet metal to be stably placed on the workbench 1 for processing.

[0031] In this application, the fixed support 31 is located at the center of the workbench 1, providing a stable initial support point for the sheet metal part, bearing part of its weight, and determining the approximate center position of the sheet metal part on the workbench 1. Four sets of elastic supports 32 are symmetrically distributed in pairs on both sides of the fixed support 31. When the sheet metal part is placed on it, the elastic supports 32 can adaptively deform according to the surface shape and placement angle of the sheet metal part. During processing, if the sheet metal part is subjected to external impact or vibration, the elastic supports 32 can act as a buffer, absorbing energy, reducing vibration transmission, and maintaining the stability of the sheet metal part. At the same time, this elastic deformation can also adapt to some sheet metal parts with slight unevenness or curvature, ensuring good contact between the sheet metal part and the fixture. The fixed support 31 and the elastic supports 32 work together to support the sheet metal part from multiple positions, including the center and both sides. Compared with a single support method, this greatly improves the stability of the sheet metal part placed on the workbench 1, making it less prone to shaking or displacement during processing.

[0032] Preferably, the fixed support 31 includes a fixed frame 311 and a placement frame 312. The fixed frame 311 is installed on the workbench 1, and the placement frame 312 is movably installed on the upper end of the fixed frame 311. The fixed frame 311 and the placement frame 312 are connected and fixed by a fixing pin 313. The shape of the placement frame 312 can be changed according to the shape of the sheet metal to be placed.

[0033] In this application, the fixing frame 311 is installed on the workbench 1, serving as the foundation of the entire fixed support 31. It provides a connection and support point to the workbench 1, ensuring the stable bearing of the placement frame 312 and the sheet metal parts. The placement frame 312 is movably installed on the upper end of the fixing frame 311 and is fixed by a fixing pin 313. When dealing with sheet metal parts of different shapes, the fixing pin 313 can be pulled out, and a placement frame 312 that matches the shape of the sheet metal part can be replaced. Then, the fixing pin 313 can be inserted again to re-fix it. This replaceable design allows the fixed support 31 to be adjusted according to the specific shape of the sheet metal part, ensuring a high degree of fit and accurate positioning when the sheet metal part is placed. Such a placement frame 312 can adapt to various sheet metal parts of different shapes. Whether it is a regular shape such as a rectangle or a circle, or an irregular shape, precise support can be achieved simply by replacing the corresponding placement frame 312, expanding the applicability of the fixture and improving its versatility and utilization rate.

[0034] Preferably, each set of elastic support members 32 includes a placement rod 321, a spring 322, a support rod 323, and a support block 324. The placement rod 321 is mounted on the workbench 1. The spring 322 is disposed on the bottom end of the placement rod 321. The bottom end of the support rod 323 is slidably mounted on the placement rod 321 and connected to the spring 322. The support block 324 is disposed on the top end of the support rod 323 and contacts the sheet metal. The support block 324 has a certain degree of toughness.

[0035] In this application, spring 322 is disposed at the bottom end of placement rod 321, and bottom end of support rod 323 is connected to it and slides within placement rod 321. When sheet metal part is placed on support block 324, the weight of sheet metal part causes support rod 323 to compress spring 322, and spring 322 deforms under force to store elastic potential energy. During processing, if sheet metal part is subjected to external force (such as processing vibration, cutting force, etc.), spring 322 can buffer, absorb and release energy through further compression or rebound, reducing the impact of external force on sheet metal part. Support block 324 has toughness; when the surface of sheet metal part is uneven, support block 324 can deform to a certain extent, better conforming to the surface of sheet metal part and ensuring stable support. At the same time, the sliding fit of support rod 323 within placement rod 321 allows support block 324 to adjust its position according to the undulations of sheet metal part surface, providing stable support to sheet metal part from multiple directions.

[0036] Preferably, the sheet metal fixing structure 4 includes an electric cylinder 41, a movable connecting plate 42, a connecting frame 43, and a fixing block 44. The electric cylinder 41 is mounted on the mounting frame 2. The movable connecting plate 42 is slidably mounted on the vertical plate inside the mounting plate. One end of the movable connecting plate 42 is located outside the mounting frame 2 and connected to the working end of the electric cylinder 41. The other end of the movable connecting plate 42 is located inside the mounting frame 2. The connecting frame 43 is mounted on the other side of the movable connecting plate 42 and is located directly above the fixing frame 311. The fixing block 44 is movably mounted on the connecting frame 43. A fixing pin 45 is provided between the fixing block 44 and the connecting frame 43. The fixing block 44 can be fixed on the connecting frame 43 by the fixing pin 45. The shape of the fixing block 44 can be changed according to the shape of the sheet metal to be placed.

[0037] In this application, an electric cylinder 41 serves as the power source and is mounted on the mounting bracket 2. When the electric cylinder 41 is activated, its working end extends and retracts, driving the connected movable connecting plate 42. Since the movable connecting plate 42 is slidably mounted on the vertical plate, the accuracy of the movement direction is ensured, and the linear motion of the electric cylinder 41 can be stably transmitted to the connecting bracket 43. The connecting bracket 43 is located directly above the fixed bracket 311, and moves up and down synchronously with the movement of the movable connecting plate 42. This design allows the fixing block 44 to precisely approach or move away from the sheet metal parts placed on the fixed bracket 311 and the elastic support 32, realizing the up and down clamping action of the sheet metal parts, and flexibly adjusting the clamping height according to the sheet metal parts of different thicknesses. The fixing block 44 is movably mounted on the connecting frame 43 via the fixing pin 2 45. When encountering sheet metal parts of different shapes, the fixing pin 2 45 can be pulled out, and the fixing block 44 with a high fit to the shape of the sheet metal part can be replaced. Then the fixing pin 2 45 can be inserted to fix it, ensuring that a uniform and effective clamping force is applied to the sheet metal part from above. The design of the replaceable fixing block 44 in this application enables the sheet metal fixing structure 4 to cope with sheet metal parts of various shapes, greatly expanding the applicability of the clamp. Whether it is common rectangular or round sheet metal, or complex and irregular irregular sheet metal, reliable clamping can be achieved.

[0038] Preferably, the sheet metal limiting structure 5 includes a driving component 51 and a limiting component 52. The driving component 51 is installed above the horizontal plate in the mounting frame 2 and is located on one side of the driving electric cylinder. There are two sets of limiting components 52. Both sets of limiting components 52 are connected to the working end of the driving component 51. The upper ends of the two sets of limiting components 52 are symmetrically slidably arranged on both sides of the horizontal plate in the mounting frame 2, and the lower ends of the two sets of limiting components 52 are symmetrically located on both sides of the fixing frame 311.

[0039] In this application, the drive component 51 is mounted above the horizontal plate and adjacent to the drive cylinder. Upon receiving a control command, its working end can generate linear motion. Since both sets of limiting components 52 are connected to the working end of the drive component 51, the driving force of the drive component 51 is synchronously transmitted to the limiting components 52 on both sides, ensuring that they move inward or outward simultaneously, achieving precise coordinated action. This symmetrical design in this application allows the limiting components 52 to adapt to sheet metal parts of different widths. Simply adjusting the stroke of the drive component 51 is sufficient to flexibly address these variations, expanding the applicability of the fixture and meeting diverse sheet metal processing needs.

[0040] Preferably, the driving component 51 includes a drive motor 511, a transmission mounting frame 512, a bevel gear set 513, and a threaded rod 514. The drive motor 511 is mounted above the mounting frame 2. The transmission mounting frame 512 is located on one side of the drive motor 511 on the mounting frame 2. The bevel gear set 513 is rotatably disposed within the transmission mounting frame 512. The bevel gear set 513 contains three bevel gears arranged in a U-shape. One bevel gear is connected to the working end of the drive motor 511 on the side closest to the drive motor 511. The other two bevel gears are symmetrically distributed within the transmission mounting frame 512. There are two threaded rods 514, which are symmetrically disposed above the mounting frame 2. One end of each threaded rod 514 is rotatably mounted on the mounting frame 2, and the other end of each threaded rod 514 passes through the transmission mounting frame 512 and is connected to a bevel gear. Each threaded rod 514 is threadedly connected to a set of limiting members 52.

[0041] In this application, the drive motor 511 is mounted above the mounting bracket 2 as a power source. After startup, the rotational power output by the motor shaft is transmitted to the bevel gear connected to it. This bevel gear acts as the driving gear, driving two other symmetrical bevel gears arranged in a U-shape to rotate synchronously in opposite directions. This unique bevel gear set 513 layout cleverly divides the single rotational power of the drive motor 511 into two rotational forces in opposite directions, which is precise and efficient. Each of the two symmetrically rotating bevel gears is connected to a threaded rod 514. When the bevel gear rotates, the threaded rod 514 rotates synchronously with it. Since one end of the threaded rod 514 is rotatably mounted on the mounting bracket 2, forming a stable fulcrum, and is threadedly connected to the limiting member 52, according to the principle of threaded transmission, as the threaded rod 514 rotates, the limiting member 52 will move linearly along the axial direction of the threaded rod 514. Driven by the threaded rod 514, the limiting member 52 moves from both sides of the mounting bracket 2 towards the center or in the opposite direction, thereby achieving dynamic and precise limiting of the side of the sheet metal part. This application allows for easy and immediate adjustment of the moving direction and speed of the limiting member 52 by controlling the forward and reverse rotation and speed of the drive motor 511, conveniently adapting to the side limiting requirements of sheet metal parts of different sizes and shapes. Whether the sheet metal part is narrow or wide, it can quickly match the optimal limiting state, significantly improving the versatility of the fixture.

[0042] Preferably, each set of limiting components 52 includes a sliding connecting frame 521, a limiting connecting plate 522, and a limiting rod 523. The sliding connecting frame 521 is slidably installed in the horizontal plate on the mounting frame 2, and the top end of the sliding connecting frame 521 is threadedly connected to a threaded rod 514. The limiting connecting plate 522 is installed on the bottom end of the sliding connecting frame 521. There are two limiting rods 523, which are symmetrically arranged on both sides of the bottom end of the limiting connecting plate 522 and are spaced apart. Each limiting rod 523 is provided with a rubber sleeve 524, and each limiting rod 523 contacts the sheet metal through the rubber sleeve 524.

[0043] In this application, the sliding connecting bracket 521 is slidably installed in the horizontal plate of the mounting bracket 2, and its top end is threadedly connected to the threaded rod 514. When the threaded rod 514 rotates, according to the characteristics of thread transmission, the sliding connecting bracket 521 will make a precise vertical lifting and lowering movement along the horizontal plate. This design cleverly converts the rotational movement of the threaded rod 514 into the linear movement of the limiting member 52, ensuring that the limiting member 52 can accurately reach the predetermined height position and limit the sheet metal part from the side. The limiting rods 523 are symmetrically arranged on both sides of the bottom end of the limiting connecting plate 522, and each limiting rod 523 is fitted with a rubber sleeve 524. During the limiting process, when the limiting rod 523 approaches the side of the sheet metal part, the rubber sleeve 524 contacts the sheet metal part first. On the one hand, due to its elastic properties, the rubber sleeve 524 can adapt to the slight unevenness on the side of the sheet metal part, ensuring a tight fit and achieving precise positioning; on the other hand, the rubber sleeve 524 plays a buffering role. If the sheet metal part has a slight shaking or displacement tendency during processing, the rubber sleeve 524 can absorb the impact energy and prevent hard collisions from damaging the sheet metal part.

[0044] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A sheet metal clamping fixture with upper and lower clamping and side limiting, characterized in that, It includes a workbench (1) and a mounting frame (2) mounted on the workbench (1). The mounting frame (2) is composed of a vertical plate and a horizontal plate. The vertical plate of the mounting frame (2) is mounted on one side above the workbench (1), and the horizontal plate of the mounting frame (2) is located above the vertical plate and directly above the workbench (1). A sheet metal placement structure (3) is also provided above the workbench (1). A sheet metal fixing structure (4) and a sheet metal limiting structure (5) are respectively provided on the mounting frame (2). The working end of the sheet metal fixing structure (4) is below the horizontal plate in the mounting frame (2), and the working end of the sheet metal fixing structure (4) corresponds vertically to the sheet metal placement structure (3). The working end of the sheet metal limiting structure (5) is located on both sides below the mounting frame (2), and the working end of the sheet metal limiting structure (5) is also located on both sides of the sheet metal placement structure (3).

2. The sheet metal clamping fixture with upper and lower clamping side limiting as described in claim 1, characterized in that, The sheet metal placement structure (3) includes a fixed support (31) and an elastic support (32). The fixed support (31) is located above the workbench (1) and in the middle position. There are four sets of elastic supports (32). The four sets of elastic supports (32) are symmetrically arranged on both sides of the fixed support (31). The fixed support (31) and the four sets of elastic supports (32) enable the sheet metal to be stably placed on the workbench (1) for processing.

3. A sheet metal clamping fixture with upper and lower clamping side limiting as described in claim 2, characterized in that, The fixed support (31) includes a fixed frame (311) and a placement frame (312). The fixed frame (311) is installed on the workbench (1), and the placement frame (312) is movably installed on the upper end of the fixed frame (311). The fixed frame (311) and the placement frame (312) are connected and fixed by a fixing pin (313). The shape of the placement frame (312) can be changed according to the shape of the sheet metal to be placed.

4. A sheet metal clamping fixture with upper and lower clamping side limiting as described in claim 2, characterized in that, Each set of elastic support members (32) includes a placement rod (321), a spring (322), a support rod (323), and a support block (324). The placement rod (321) is mounted on the workbench (1). The spring (322) is located at the bottom end of the placement rod (321). The bottom end of the support rod (323) is slidably mounted in the placement rod (321) and connected to the spring (322). The support block (324) is located at the top end of the support rod (323) and contacts the sheet metal. The support block (324) has a certain degree of toughness.

5. A sheet metal clamping fixture with upper and lower clamping side limiting as described in claim 3, characterized in that, The sheet metal fixing structure (4) includes an electric cylinder (41), a movable connecting plate (42), a connecting frame (43), and a fixing block (44). The electric cylinder (41) is mounted on the mounting frame (2). The movable connecting plate (42) is slidably mounted on the vertical plate inside the mounting plate. One end of the movable connecting plate (42) is located outside the mounting frame (2) and connected to the working end of the electric cylinder (41). The other end of the movable connecting plate (42) is located inside the mounting frame (2). The connecting frame (43) is mounted on the other side of the movable connecting plate (42) and is located directly above the fixing frame (311). The fixing block (44) is movably mounted on the connecting frame (43). A fixing pin (45) is provided between the fixing block (44) and the connecting frame (43). The fixing block (44) can be fixed on the connecting frame (43) by the fixing pin (45). The shape of the fixing block (44) can be changed according to the shape of the sheet metal to be placed.

6. A sheet metal clamping fixture with upper and lower clamping side limiting as described in claim 3, characterized in that, The sheet metal limiting structure (5) includes a driving component (51) and a limiting component (52). The driving component (51) is installed above the horizontal plate in the mounting frame (2) and is located on one side of the driving electric cylinder. There are two sets of limiting components (52). Both sets of limiting components (52) are connected to the working end of the driving component (51). The upper ends of the two sets of limiting components (52) are symmetrically slidably arranged on both sides of the horizontal plate in the mounting frame (2). The lower ends of the two sets of limiting components (52) are symmetrically located on both sides of the fixing frame (311).

7. A sheet metal clamping fixture with upper and lower clamping side limiting as described in claim 6, characterized in that, The driving component (51) includes a drive motor (511), a transmission mounting bracket (512), a bevel gear set (513), and a threaded rod (514). The drive motor (511) is mounted above the mounting bracket (2). The transmission mounting bracket (512) is located on one side of the drive motor (511) on the mounting bracket (2). The bevel gear set (513) is rotatably disposed within the transmission mounting bracket (512). The bevel gear set (513) contains three bevel gears arranged in a U-shape, with one bevel gear close to the drive motor (511). One side of 11) is connected to the working end of the drive motor (511), and the other two bevel gears are symmetrically distributed in the transmission placement frame (512). There are two threaded rods (514), which are symmetrically arranged above the mounting frame (2). One end of each threaded rod (514) is rotatably mounted on the mounting frame (2), and the other end of each threaded rod (514) passes through the transmission placement frame (512) and is connected to a bevel gear. Each threaded rod (514) is threadedly connected to a set of limiting members (52).

8. A sheet metal clamping fixture with upper and lower clamping side limiting as described in claim 7, characterized in that, Each of the limiting components (52) includes a sliding connecting frame (521), a limiting connecting plate (522), and a limiting rod (523). The sliding connecting frame (521) is slidably installed in the horizontal plate on the mounting frame (2), and the top of the sliding connecting frame (521) is threadedly connected to a threaded rod (514). The limiting connecting plate (522) is installed on the bottom end of the sliding connecting frame (521). There are two limiting rods (523), which are symmetrically arranged on both sides of the bottom end of the limiting connecting plate (522) and are spaced apart. Each limiting rod (523) is provided with a rubber sleeve (524), and each limiting rod (523) contacts the sheet metal through the rubber sleeve (524).

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