A sheet drawing machine

Abstract

This utility model relates to the field of sheet metal stretching equipment, and more particularly to a sheet metal stretching machine. It includes a base plate, a second telescopic mechanism fixed on a support plate, the output end of the second telescopic mechanism being fixedly connected to a clamping frame, and openings on opposite sides of the two clamping frames. An upper toothed plate is located above a lower toothed plate and slides up and down within the clamping frames. Two ends of a mounting plate are fixed to the two support plates respectively. A straightening frame is located below the mounting plate and between the two clamping frames. A third telescopic mechanism is fixed to the mounting plate, and its output end passes through the mounting plate and is fixedly connected to the straightening frame. A lower straightening assembly includes a straightening rod disposed on the base plate, located between the two clamping frames. By using the upper and lower straightening assemblies to pre-straighten the bent sheet metal before using the stretching machine to straighten and stretch it, the flatness of the sheet metal after stretching is ensured, improving the overall quality of the sheet metal.

Description

Technical Field

[0001] This utility model relates to the field of sheet metal stretching equipment, and in particular to a sheet metal stretching machine. Background Technology

[0002] Aluminum alloy is a low-density but high-strength metal material, with strength approaching or even exceeding that of high-quality steel. It has good plasticity and can be processed into various profiles. It also has good electrical conductivity, thermal conductivity, and corrosion resistance. It is widely used in many fields, second only to steel in terms of usage. The use of aluminum alloy sheets is often accompanied by stamping and stretching, which stretches the sheet into the required shape before it can be used.

[0003] When existing aluminum alloy sheets are heated and stretched, the two ends of the sheet are clamped by two chucks of a stretching machine. The movement of one of the chucks is controlled by a hydraulic cylinder to stretch the sheet. The aluminum alloy sheet itself will change in length and thickness as it is stretched. However, if the sheet is already bent before stretching, the stress inside the sheet is relatively large, which may cause the chucks at both ends to not bite tightly. Under this condition, the sheet will still bend after being stretched and straightened by the stretching machine. Summary of the Invention

[0004] To address the issue that bent boards may still bend after being stretched and straightened using a stretching machine, this invention proposes a board stretching machine. This machine uses an upper straightening component and a lower straightening component to pre-straighten the bent board before stretching it with the machine, ensuring the flatness of the board after stretching and improving the overall quality of the board.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: A sheet metal stretching machine includes a base plate with two opposing support plates and a clamping assembly located between the two support plates. The clamping assembly is slidably mounted on the base plate and includes a clamping frame, an upper toothed plate, a lower toothed plate, and a first telescopic mechanism. A second telescopic mechanism is fixedly mounted on the support plates, with its output end fixedly connected to the clamping frame. The two clamping frames have openings on opposite sides. The upper toothed plate is located above the lower toothed plate and slidably mounted within the clamping frame. The first telescopic mechanism is fixed to the clamping frame, with its output end extending into the clamping frame and fixedly connected to the upper toothed plate. The lower toothed plate is fixed within the clamping frame. The clamping assembly is used to clamp both ends of the sheet metal before stretching it. The stretching machine also includes an upper straightening assembly and a lower straightening assembly. The upper straightening assembly includes a mounting plate, a straightening frame, and a third telescopic mechanism. The two ends of the mounting plate are fixed to two support plates, respectively. The straightening frame is located between the lower side of the mounting plate and two clamping frames. The third telescopic mechanism is fixed to the mounting plate, and its output end passes through the mounting plate and is fixedly connected to the straightening frame. The lower straightening assembly includes a straightening rod mounted on a base plate, located between the two clamping frames. The upper and lower straightening assemblies work together to pre-level the bent sheet metal, which facilitates the subsequent clamping of the sheet metal's ends. This effectively reduces slippage relative to the clamping components when the internal stress of the bent sheet metal is too high during the stretching process, thereby improving the quality of the sheet metal stretching.

[0006] Preferably, a slide rail is fixed to the upper side of the base plate, and a first slider that cooperates with the slide rail is fixed to the lower side of the clamping frame. The two slide rails are arranged opposite to each other to improve the stability of the clamping frame during the sliding process.

[0007] Preferably, a fixing block is fixed inside the clamping frame, and a first sliding groove is formed on the side of the fixing block near the opening of the clamping frame. A second sliding block that cooperates with the first sliding groove is fixed on the side of the upper toothed plate near the fixing block. The first sliding groove is T-shaped to ensure the stability of the upper toothed plate during the lifting process.

[0008] Preferably, the clamping frame is provided with a purging assembly, which includes a purging pipe and a purging nozzle. One end of the purging pipe extends out of the clamping frame and communicates with an external air supply device, and the output end of the purging nozzle faces between the upper and lower toothed plates. During the clamping process of the sheet metal between the upper and lower toothed plates, waste material may remain. When this waste material remains between the upper and lower toothed plates, it can cause instability in the clamping of the sheet metal.

[0009] Preferably, the clamping frame has a feeding port on its side to facilitate the placement of the sheet material.

[0010] Preferably, the straightening frame includes multiple horizontal bars and vertical bars, with the horizontal bars and vertical bars arranged perpendicularly and fixedly connected, and a gap between adjacent horizontal bars or vertical bars. This improves the pre-flattening effect of bent sheet metal.

[0011] Preferably, the straightening rod is fixed to the base plate, and the upper end face of the straightening rod is flush with the upper end face of the lower tooth plate.

[0012] Preferably, the lower straightening assembly further includes a vertical plate, a fourth telescopic mechanism, and a position sensor. The straightening rod is arranged longitudinally along the base plate. There are two vertical plates located at both ends of the straightening rod. The straightening rod is slidably mounted on the vertical plates. The fourth telescopic mechanism is fixed on the base plate, and its telescopic end extends upward and is connected and fixed to the straightening rod. The position sensor is fixed on the vertical plate.

[0013] Preferably, a second sliding groove is provided on the upright plate, and a sliding shaft is fixed to the end of the straightening rod, with one end of the sliding shaft extending out of the upright plate and passing through a pin.

[0014] The beneficial effects of this utility model through the above technical solution are as follows: When the two ends of the plate are placed on the lower toothed plates of the two clamping components, the third telescopic mechanism in the upper straightening component drives the straightening frame to press the bent part of the plate downward until the lower side of the plate abuts against the upper side of the straightening rod. At this time, the two ends of the plate are flat. Then, the first telescopic mechanism drives the upper toothed plate to move downward until the upper toothed plate and the lower toothed plate clamp the end of the plate. The second telescopic mechanism can then be used to stretch the plate. The upper straightening component and the lower straightening component cooperate with each other to pre-flatten the bent plate, which is beneficial to the stability of the clamping components clamping the two ends of the plate, thereby improving the quality of plate stretching. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a sheet metal stretching machine according to the present invention; Figure 2 This utility model relates to a sheet metal stretching machine. Figure 1 Enlarged view of the structure at point A in the middle; Figure 3 This is a structural cross-sectional view of the fixing block and upper toothed plate of a sheet metal stretching machine according to the present invention; Figure 4 This is an enlarged view of the straightening frame and lower straightening assembly of a sheet metal stretching machine according to this utility model; Figure 5 This is a front view of a sheet metal sheet placed on a lower toothed plate in a sheet metal stretching machine according to this utility model.

[0016] In the attached diagram, the following numbers are used: 1 is the base plate, 2 is the support plate, 3 is the clamping assembly, 31 is the clamping frame, 311 is the feeding port, 32 is the upper toothed plate, 33 is the lower toothed plate, 34 is the first telescopic mechanism, 35 is the first slider, 36 is the fixing block, 37 is the first slide groove, and 38 is the second slider. 4 is the second telescopic mechanism, 5 is the upper straightening component, 51 is the mounting plate, 52 is the third telescopic mechanism, 53 is the crossbar, and 54 is the longitudinal bar; 6 is the lower straightening component, 61 is the straightening rod, 611 is the sliding shaft, 62 is the vertical plate, 621 is the second slide groove, 63 is the fourth telescopic mechanism, and 64 is the position sensor; 10 is the board material, 11 is the purge pipe, and 12 is the purge nozzle. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: like Figures 1-5As shown, this embodiment provides a sheet metal stretching machine, including a base plate 1. The base plate 1 is provided with two opposing support plates 2 and clamping components 3. The two clamping components 3 are located between the two support plates 2. In this embodiment, the two clamping components 3 are slidably arranged on the base plate 1. The clamping assembly 3 includes a clamping frame 31, an upper toothed plate 32, a lower toothed plate 33, and a first telescopic mechanism 34. For details, please refer to... Figure 1 The upper side of the base plate 1 is fixed with a slide rail 7 by bolts, and the lower side of the clamping frame 31 is welded and fixed with a first slider 35 that cooperates with the slide rail 7. Each clamping frame 31 has two opposing slide rails 7 on its lower side to improve the stability of the clamping frame 31 sliding on the base plate 1.

[0018] refer to Figure 2 The support plate 2 is fixed with a second telescopic mechanism 4. The output end of the second telescopic mechanism 4 is fixedly connected to the clamping frame 31. The second telescopic mechanism 4 is a hydraulic cylinder. In this embodiment, two cylinders are provided. The cylinder seat is fixed to the side of the support plate 2 near the clamping frame 31 by bolts. The end of the telescopic rod is fixedly connected to the clamping frame 31 by bolts. The two clamping frames 31 are opened on opposite sides, so that the plate 10 can enter the clamping frame 31.

[0019] The upper toothed plate 32 is located above the lower toothed plate 33. The upper toothed plate 32 is slidably disposed in the clamping frame 31. The first telescopic mechanism 34 is fixed on the clamping frame 31, and its output end extends into the clamping frame 31 and is connected and fixed to the upper toothed plate 32. The lower toothed plate 33 is welded and fixed in the clamping frame 31. Multiple toothed blocks are provided on the side opposite to the lower toothed plate 33 to increase the friction between the upper toothed plate 32 and the plate 10 and reduce the relative sliding situation when stretching the plate.

[0020] The clamping frame 31 has a feeding port 311 on its side. The plate 10 is manually placed into the clamping frame 31 through the feeding port 311.

[0021] In this embodiment, the first telescopic mechanism 34 is a hydraulic cylinder, and there are two cylinders. The cylinder seat is fixed to the upper side of the clamping frame 31 by bolts. The telescopic rod passes through the opening in the clamping frame 31 and enters the interior of the clamping frame 31 and is fixedly connected to the upper toothed plate 32 by bolts. When the plate 10 is placed on the lower toothed plate 33, the first telescopic mechanism 34 drives the upper toothed plate 32 to move downward to clamp the plate 10 between the upper toothed plate 32 and the lower toothed plate 33.

[0022] To ensure the stability of the upper toothed plate 32's vertical movement within the clamping frame 31, a fixing block 36 is fixed inside the clamping frame 31. A first sliding groove 37 is formed on the side of the fixing block 36 near the opening of the clamping frame 31. A second sliding block 38, which cooperates with the first sliding groove 37, is fixed on the side of the upper toothed plate 32 near the fixing block 36. The fixing block 36 is welded to the center of the clamping frame 31. (Refer to...) Figure 3 The first groove 37 on the fixed block 36 is T-shaped, and the second slider 38, which is welded and fixed on the upper toothed plate 32, can slide freely in the first groove 37.

[0023] In other embodiments, one clamping component 3 is fixed to the base plate 1, and the other clamping component 3 is slidably disposed on the base plate 1. The clamping frame 31 in the slidably disposed clamping component 3 is controlled to slide by the second telescopic mechanism 4. The fixedly disposed clamping component 3 is not provided with the second telescopic mechanism 4. When stretching the plate 10, it is only necessary to control the sliding of one side of the clamping component 3.

[0024] Meanwhile, a purging assembly is provided on the clamping frame 31. The purging assembly includes a purging pipe 11 and a purging nozzle 12. One end of the purging pipe 11 extends out of the clamping frame 31 and communicates with an external air supply device. The output end of the purging nozzle 12 faces the space between the upper toothed plate 32 and the lower toothed plate 33. In this embodiment, four purging nozzles 12 are provided, so the purging pipe 11 includes four branch pipes and one main pipe. One end of each branch pipe passes through the clamping frame 31 and is connected to the purging nozzle 12, and the other end is connected to the main pipe. The main pipe is connected to an external air supply device.

[0025] Further, refer to Figure 4 The stretching machine also includes an upper straightening assembly 5 and a lower straightening assembly 6. The plate 10 is located between the upper straightening assembly 5 and the lower straightening assembly 6. The upper straightening assembly 5 includes a mounting plate 51, a straightening frame, and a third telescopic mechanism 52. The two ends of the mounting plate 51 are welded and fixed to two support plates 2 respectively. The straightening frame is located between the lower side of the mounting plate 51 and two clamping frames 31. In this embodiment, the straightening frame includes multiple horizontal bars 53 and vertical bars 54. The horizontal bars 53 and vertical bars 54 are arranged perpendicularly and welded and fixed, and there is a gap between two adjacent horizontal bars 53 or vertical bars 54. In this embodiment, there are three horizontal bars 53 and three vertical bars 54, forming a multi-grid shape. When in contact with the bent plate 10, the pressure can be transmitted more evenly to all positions of the plate 10, ensuring the pre-flattening effect of the plate 10.

[0026] The third telescopic mechanism 52 is fixed on the mounting plate 51. The output end of the third telescopic mechanism 52 passes through the mounting plate 51 and is fixedly connected to the straightening frame. The third telescopic mechanism 52 adopts a hydraulic cylinder. In this embodiment, three third telescopic mechanisms 52 are provided. The cylinder seat is fixed on the mounting plate 51 by bolts. The telescopic rod passes through the opening on the mounting plate 51 and is welded and fixed together with the crossbar 53 of the straightening frame.

[0027] The lower straightening assembly 6 includes a straightening rod 61 disposed on the base plate 1, located between two clamping frames 31. In this embodiment, the straightening rod 61 is fixed to the base plate 1, and its upper end face is flush with the upper end face of the lower toothed plate 33. In this embodiment, three sets of lower straightening assemblies 6 are provided, which are evenly distributed along the transverse direction of the base plate 1 between the two clamping assemblies 3. The straightening rod 61 restricts the lowest position of the plate 10's descent, thereby cooperating with the upper straightening assembly 5 to achieve pre-flattening treatment of the plate 10.

[0028] When using this device: the plate 10 is manually placed on the upper surface of the lower toothed plate 33 through the feeding port 311. At this time, the third telescopic mechanism 52 is activated. The output end of the third telescopic mechanism 52 drives the straightening frame to contact the plate 10 and continue to move downward until the plate 10 is close to the straightening rod 61 with a gap of 1-5mm to avoid obstructing the stretching of the plate 10 and facilitate the stretching of the plate 10. At this time, the first telescopic mechanism 34 is activated. The first telescopic mechanism 34 drives the upper toothed plate 32 to clamp the end of the plate 10. The second telescopic mechanism 4 is activated to stretch the plate 10.

[0029] In another embodiment, reference Figure 4 The difference from the above embodiment is that the lower straightening assembly 6 further includes a vertical plate 62, a fourth telescopic mechanism 63, and a position sensor 64. The straightening rod 61 is arranged longitudinally along the base plate 1. There are two vertical plates 62 located at both ends of the straightening rod 61. The straightening rod 61 is slidably mounted on the vertical plates 62. Specifically, the vertical plate 62 has a second sliding groove 621. A sliding shaft 611 is fixed to the end of the straightening rod 61. One end of the sliding shaft 611 extends out of the vertical plate 62 and is fitted with a pin. The fourth telescopic mechanism 63 is fixed to the base plate 1, and its telescopic end extends upward and is connected and fixed to the straightening rod 61. Multiple fourth telescopic mechanisms 63 are provided. Their cylinder seats are fixed to the base plate 1 by bolts, and their telescopic rods are fixed to the lower side of the straightening rod 61 by bolts.

[0030] The position sensor 64 is fixed on the upright plate 62. The position sensor 64 is used to locate the position of the plate 10, ensuring that the horizontal position of the plate 10 between the straightening frame and the straightening rod 61 is at the same height as the upper end of the lower tooth plate 33, thereby ensuring the flatness of the plate 10 during stretching. In this embodiment, the position sensor 64 is model GRTE18-P11121066542.

[0031] In this embodiment, when the output end of the fourth telescopic mechanism 63 moves upward with the plate 10, when the position sensor 64 senses that the output end of the fourth telescopic mechanism 63 has reached the preset position, it controls the fourth telescopic mechanism 63 to stop moving. At this position, the straightening rod 61 and the straightening frame clamp the plate 10 in the middle to ensure the pre-flattening effect of the plate 10.

[0032] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A sheet drawing machine comprising a base plate (1), characterized in that, The base plate (1) is provided with two opposing support plates (2) and clamping components (3). The two clamping components (3) are located between the two support plates (2) and are slidably disposed on the base plate (1). The clamping assembly (3) includes a clamping frame (31), an upper toothed plate (32), a lower toothed plate (33), and a first telescopic mechanism (34). A second telescopic mechanism (4) is fixed on the support plate (2). The output end of the second telescopic mechanism (4) is fixedly connected to the clamping frame (31). The two clamping frames (31) are opened on opposite sides. The upper toothed plate (32) is located above the lower toothed plate (33). The upper toothed plate (32) slides up and down inside the clamping frame (31). The first telescopic mechanism (34) is fixed on the clamping frame (31), and its output end extends into the clamping frame (31) and is connected and fixed to the upper toothed plate (32). The lower toothed plate (33) is fixed inside the clamping frame (31). The stretching machine also includes an upper straightening assembly (5) and a lower straightening assembly (6). The upper straightening assembly (5) includes a mounting plate (51), a straightening frame, and a third telescopic mechanism (52). The two ends of the mounting plate (51) are fixed on two support plates (2), respectively. The straightening frame is located between the lower side of the mounting plate (51) and the two clamping frames (31). The third telescopic mechanism (52) is fixed on the mounting plate (51). The output end of the third telescopic mechanism (52) passes through the mounting plate (51) and is fixedly connected to the straightening frame. The lower straightening assembly (6) includes a straightening rod (61) set on the base plate (1). The straightening rod (61) is located between the two clamping frames (31).

2. A sheet drawing machine according to claim 1, characterized in that The upper side of the base plate (1) is fixed with a slide rail (7), and the lower side of the clamping frame (31) is fixed with a first slider (35) that cooperates with the slide rail (7).

3. A sheet drawing machine according to claim 1, characterized in that A fixing block (36) is fixed inside the clamping frame (31). A first sliding groove (37) is provided on the side of the fixing block (36) near the opening of the clamping frame (31). A second sliding block (38) that cooperates with the first sliding groove (37) is fixed on the side of the upper toothed plate (32) near the fixing block (36).

4. A sheet drawing machine according to claim 1, characterized in that The clamping frame (31) is provided with a purging assembly, which includes a purging pipe (11) and a purging nozzle (12). One end of the purging pipe (11) extends out of the clamping frame (31) and is connected to an external air supply device. The output end of the purging nozzle (12) faces between the upper tooth plate (32) and the lower tooth plate (33).

5. A sheet drawing machine according to claim 1, characterized in that The clamping frame (31) has a feeding port (311) on its side.

6. A sheet drawing machine according to claim 1, wherein The straightening frame includes multiple horizontal bars (53) and vertical bars (54). The horizontal bars (53) and vertical bars (54) are arranged perpendicularly and fixedly connected. There is a gap between two adjacent horizontal bars (53) or vertical bars (54).

7. A sheet drawing machine according to claim 1, wherein The straightening rod (61) is fixed on the base plate (1), and the upper end face of the straightening rod (61) is flush with the upper end face of the lower tooth plate (33).

8. A sheet drawing machine according to claim 1, characterized in that The lower straightening assembly (6) also includes a vertical plate (62), a fourth telescopic mechanism (63), and a position sensor (64). The straightening rod (61) is arranged longitudinally along the base plate (1). There are two vertical plates (62) located at both ends of the straightening rod (61). The straightening rod (61) is slidably mounted on the vertical plate (62). The fourth telescopic mechanism (63) is fixed on the base plate (1), and its telescopic end extends upward and is connected and fixed to the straightening rod (61). The position sensor (64) is fixed on the vertical plate (62).

9. A sheet drawing machine according to claim 8, characterized in that The upright plate (62) is provided with a second sliding groove (621), and the end of the straightening rod (61) is fixed with a sliding shaft (611). One end of the sliding shaft (611) extends out of the upright plate (62) and is threaded with a pin.

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