Sheet bending forming device

Abstract

This invention discloses a sheet bending and forming device, belonging to the technical field of bending and forming equipment. It includes a work platform and two forming rollers, both slidably mounted on the inner frame of the work platform for forming the outer wall of a sheet; a lifting plate located above and between the two forming rollers, the bottom of which is fixed with an integrally formed fixing part and a forming column, the forming column being used to extrude and form the inner wall of the sheet; a connecting member for controlling the two forming rollers to move closer or further apart; and a driving unit for driving the lifting plate to move up and down. When the forming column moves downward and its center position is lower than the center height of the two forming rollers, the connecting member controls the two forming rollers to move closer together. This invention, through the cooperation between its structures, compensates for the bending angle of the sheet, thereby improving the accuracy of the formed part to meet the needs of the actual finished product.

Description

Technical Field

[0001] This invention relates to the field of bending and forming equipment technology, specifically to a sheet bending and forming device. Background Technology

[0002] A bending machine is a machine that can bend thin plates into different angles or arcs. It usually uses the closing of upper and lower dies to achieve the bending process.

[0003] Currently, when bending thin metal sheets, in addition to plastic deformation, elastic deformation also occurs during bending. Due to the springback effect of the elastic deformation, the bending angle or arc of the thin sheet will be smaller than the actual angle or arc obtained during processing. When dealing with thin sheet parts that require precise bending angles or arcs, it is essential to eliminate the springback after bending. Summary of the Invention

[0004] The purpose of this invention is to provide a sheet bending and forming apparatus to solve at least one technical problem existing in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a sheet bending and forming apparatus, comprising a work frame, and further comprising:

[0006] Two forming rollers are slidably mounted on the inner frame of the worktable for forming the outer wall of the sheet metal.

[0007] A lifting plate is located above the middle of two forming rollers. The bottom of the lifting plate is fixed with an integrally formed fixing part and a forming column, and the forming column is used to extrude and form the inner wall of the thin plate.

[0008] Connector, used to control the two forming rollers to move closer or further apart;

[0009] The drive unit is used to drive the lifting plate to move up and down. When the forming column moves down and its center position is lower than the center height of the two forming rollers, the connector controls the two forming rollers to move closer to each other.

[0010] Preferably, the connector includes a slide groove formed on the inner wall of both sides of the work frame, two sliders are slidably installed on the inner wall of each of the two slide grooves, and tension springs are respectively connected to the outer walls of the two sliders in the same slide groove that are facing away from each other. The two forming rollers are respectively installed between the two sliders on the same side of the two slide grooves, and connecting rods are rotatably connected to the outer walls of the two sliders. The opposite ends of the two connecting rods are rotatably connected by connecting pins.

[0011] The connector also includes a vertical plate fixed to the bottom of the lifting plate. The bottom of the vertical plate has an arc-shaped notch. When the center of the forming column and the center of the forming roller are on the same horizontal line, the connecting pin is inserted into the arc-shaped notch and contacts and abuts against its inner wall.

[0012] Preferably, the inner walls on both sides of the chute are fixed with blocks for limiting the forming roller, and the distance between the blocks on both sides and the inner walls on both sides of the chute is equal.

[0013] Preferably, the two forming rollers are rotatably connected to the slider.

[0014] Preferably, support plates are fixed to the top of both sides of the work frame, and a top plate is fixed to the top of the two support plates. Vertical grooves are opened on the outer walls of the two support plates, and a blocking plate is slidably installed between the two vertical grooves. Springs are connected to the inner bottom of the blocking plate and the two vertical grooves. When the thin plate is bent into a U-shape, its folded end will not contact the blocking plate. A through groove is opened in the middle of the fixed part, which allows the blocking plate to pass through and move.

[0015] Preferably, horizontal bars are slidably installed at the bottom of the top plates on both sides of the lifting plate, and vertical bars are fixed at the top of both sides of the blocking plate. The top of the two vertical bars is rotatably connected to the two horizontal bars, and the opposite ends of the two horizontal bars are provided with inclined surfaces. When the lifting plate moves up and contacts the inclined surfaces, it will push the two horizontal bars away from each other.

[0016] Preferably, the drive unit includes a telescopic cylinder fixed to the top of the top plate, and the telescopic end of the bottom of the telescopic cylinder passes through the top plate and is fixedly connected to the lifting plate.

[0017] Preferably, the top of the work frame is fixed with a stop bar for limiting the position of the thin plate, and the height of the stop bar is higher than the thickness of the thin plate.

[0018] Preferably, the baffle has multiple protrusions fixed near the outer wall of the forming roller.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] This invention, through the cooperation between structures, enables the bending angle of the thin sheet to be greater than the actual bending angle, so that the U-shaped thin sheet can conform to the actual required curvature after its own springback. Finally, by compensating for the bending angle of the thin sheet, the accuracy of the formed part is improved to meet the needs of the actual finished product. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is the front view of the present invention;

[0023] Figure 3 For the present invention Figure 2 Sectional view along the middle AA;

[0024] Figure 4 This is a front sectional view of the present invention;

[0025] Figure 5 For the present invention Figure 4 A sectional stereoscopic view from a specific perspective;

[0026] Figure 6 This is a diagram showing the state of the formed column bending thin sheet during the present invention.

[0027] Figure 7 This is a state diagram illustrating the compensation for the bending angle of the thin plate according to the present invention;

[0028] Figure 8 This is a schematic diagram of the working frame of the present invention.

[0029] In the diagram: 1. Work frame; 2. Slide groove; 3. Slider; 4. Tension spring; 5. Connecting rod; 6. Connecting pin; 7. Forming roller; 8. Thin plate; 9. Top plate; 10. Lifting plate; 11. Fixing part; 12. Forming column; 13. Vertical plate; 14. Arc-shaped notch; 15. Support plate; 16. Vertical groove; 17. Blocking plate; 18. Spring; 19. Vertical rod; 20. Intermediate rod; 21. Horizontal rod; 22. Stop block; 23. Stop bar; 24. Protrusion; 25. Telescopic cylinder. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1;

[0032] Please see Figures 1 to 8 The present invention provides a technical solution: a sheet bending and forming device, including a work frame 1, and further comprising:

[0033] Two forming rollers 7 are slidably mounted on the inner frame of the work frame 1 for forming the outer wall of the thin plate 8.

[0034] The lifting plate 10 is located above the middle of the two forming rollers 7. The bottom of the lifting plate 10 is fixed with an integrally formed fixing part 11 and a forming column 12, and the forming column 12 is used to extrude and form the inner wall of the thin plate 8.

[0035] A connector is used to control the two forming rollers 7 to move closer or further apart from each other;

[0036] The drive unit is used to drive the lifting plate 10 to move up and down. When the forming column 12 moves down and its center position is lower than the center height of the two forming rollers 7, the connecting member controls the two forming rollers 7 to move closer to each other.

[0037] In use, the sheet metal bending and forming device places the sheet metal 8 to be bent on two forming rollers 7. Then, the driving unit controls the lifting plate 10 to move downwards, thereby causing the fixing part 11 and the forming column 12 to move downwards. When the forming column 12 contacts the sheet metal 8, it compresses the sheet metal 8 into a U-shaped form through its interaction with the two forming rollers 7. (See attached image.) Figure 6 When the center of the forming column 12 and the center of the forming roller 7 are on the same horizontal line, the bent part of the thin plate 8 coincides with the tangent of the forming roller 7 and the forming column 12. That is, the straight part of the thin plate 8 is equivalent to the tangent of the forming roller 7 and the forming column 12. At this time, the thin plate 8 is bent and formed.

[0038] Then, as the lifting plate 10 continues to move the forming column 12 downwards, the center height of the forming column 12 becomes lower than the height of the forming roller 7, such as... Figure 7 As shown, at the same time, the connecting component controls the two forming rollers 7 to move closer to each other, so that the bent part of the thin plate 8 continues to bend. At this time, the straight part of the thin plate 8 will change together with the change of the tangent of the forming roller 7 and the forming column 12, so that its bending angle is greater than the actual bending angle. Finally, the thin plate 8 bent into a U-shape can meet the actual required curvature after its own springback. Finally, by compensating for the bending angle of the thin plate 8, the accuracy of the formed part is improved to meet the needs of the actual finished product.

[0039] Example 2 is based on Example 1 above;

[0040] The connector includes slide grooves 2 formed on the inner walls of both sides of the work frame 1. Two sliders 3 are slidably installed on the inner walls of the two slide grooves 2. The outer walls of the two sliders 3 in the same slide groove 2 that are facing away from each other are connected to the inner walls of the two sides of the slide groove 2 by tension springs 4. Two forming rollers 7 are respectively installed between the two sliders 3 on the same side of the two slide grooves 2. The outer walls of the two sliders 3 are rotatably connected to connecting rods 5, and the opposite ends of the two connecting rods 5 are rotatably connected by connecting pins 6.

[0041] The connector also includes a vertical plate 13 fixed to the bottom of the lifting plate 10. The bottom of the vertical plate 13 has an arc-shaped notch 14. When the center of the forming column 12 and the center of the forming roller 7 are on the same horizontal line, the connecting pin 6 is inserted into the arc-shaped notch 14 and contacts and abuts against its inner wall.

[0042] For details on the connectors, please refer to [link / reference]. Figure 1 and Figure 2 As previously described, as the lifting plate 10 moves downward, it also moves the vertical plate 13 fixed at its bottom downward. When the center of the forming column 12 and the center of the forming roller 7 are on the same horizontal line, the connecting pin 6 engages with the arc-shaped notch 14 and contacts its inner wall, thus bending the thin plate 8 to... Figure 6 In the state, when the lifting plate 10 continues to move down, the vertical plate 13 will push against the connecting pin 6 and move down. Under the connection of the two connecting rods 5, the two sliders 3 move closer to each other, thereby driving the two forming rollers 7 to move closer to each other, so as to continue to bend the thin plate 8 and complete the bending process.

[0043] After bending is completed, the drive unit moves the lifting plate 10 upward. At this time, the sliders 3 will move away from each other under the tension of the tension spring 4 until the two connecting rods 5 are straightened and reset. At the same time, the forming column 12 moves upward and separates from the U-shaped thin plate 8, completing the bending process. Then, a new thin plate 8 is placed in again to continue the above bending process.

[0044] In one preferred embodiment, the inner walls on both sides of the chute 2 are fixed with blocks 22 for limiting the forming roller 7, and the distance between the blocks 22 on both sides and the inner walls on both sides of the chute 2 is equal.

[0045] For details, please refer to [link / reference]. Figure 2 The purpose of setting the stop 22 is to prevent the slider 3 from moving excessively when it is reset under the tension of the tension spring 4, so as to ensure that the connecting pin 6 is always in the center position and plays a certain positioning role.

[0046] In one preferred embodiment, the two forming rollers 7 are rotatably connected to the slider 3.

[0047] The forming roller 7 is configured to rotate, so that it makes rolling contact with the sheet 8 during extrusion molding. This reduces friction on the outer wall of the sheet 8, thereby avoiding excessive scratches on its surface and reducing damage to the surface of the molded part. At the same time, the surface of the forming roller 7 can also be made smooth or have a soft film attached, which is also intended to reduce processing marks on the surface of the molded part and improve the quality of the molded part.

[0048] Example 3 is based on Example 1 above;

[0049] Support plates 15 are fixed to the top of both sides of the work frame 1. A top plate 9 is fixed to the top of the two support plates 15. Vertical grooves 16 are opened on the outer walls of the two support plates 15. A blocking plate 17 is slidably installed between the two vertical grooves 16. Springs 18 are connected to the inner bottom of the blocking plate 17 and the two vertical grooves 16. When the thin plate 8 is bent into a U-shape, its folded end will not contact the blocking plate 17. A through groove is opened in the middle of the fixing part 11 so that the blocking plate 17 can pass through and move.

[0050] By setting the baffle plate 17, the end of the U-shaped thin plate 8 can be blocked. That is, when the lifting plate 10 moves the fixing part 11 and the forming column 12 upward, there will be a certain friction between the forming column 12 and the formed thin plate 8, which may cause it to move upward together. The baffle plate 17 can prevent the formed thin plate 8 from moving upward, thereby separating it from the forming column 12 and completing the separation process.

[0051] It is worth noting that although the baffle plate 17 and the vertical groove 16 are connected by a spring 18, the elastic potential energy of the tension is sufficient for the baffle plate 17 to play a blocking role.

[0052] In one preferred embodiment, horizontal bars 21 are horizontally slidably installed at the bottom of the top plates 9 on both sides of the lifting plate 10, and vertical bars 19 are fixed at the top of both sides of the blocking plate 17. The top of the two vertical bars 19 are rotatably connected to the two horizontal bars 21 respectively, and the opposite ends of the two horizontal bars 21 are provided with inclined surfaces. When the lifting plate 10 moves up and contacts the inclined surfaces, it will push the two horizontal bars 21 away from each other.

[0053] As we know from the previous content, when the lifting plate 10 moves upward and the forming column 12 separates from the U-shaped thin plate 8, the lifting plate 10 will contact the inclined surfaces on the two horizontal bars 21, thereby pushing the two horizontal bars 21 away from each other. Under the connecting action of the middle bar 20, the vertical bar 19 and the blocking plate 17 will move downward and contact the U-shaped thin plate 8, applying a downward force and initial velocity to it. Combined with the gravity of the U-shaped thin plate 8 itself, the U-shaped thin plate 8 will pass through the two forming rollers 7 and fall down, achieving the effect of automatic unloading.

[0054] It is worth mentioning that since the distance between the two forming rollers 7 is the same as the distance between the U-shaped sheet 8, if the U-shaped sheet 8 meets the standard after the bending angle compensation and springback, it can smoothly fall off between the two forming rollers 7. However, if the U-shaped angle is greater than the specified angle after springback, the U-shaped sheet 8 will be stuck between the two forming rollers 7. In this way, the cooperation between the two rollers can be used to inspect and screen the formed sheet 8, further ensuring the quality of the formed parts.

[0055] In one preferred embodiment, the drive unit includes a telescopic cylinder 25 fixed to the top of the top plate 9, and the telescopic end of the bottom of the telescopic cylinder 25 passes through the top plate 9 and is fixedly connected to the lifting plate 10.

[0056] For details, please refer to [link / reference]. Figure 1 and Figure 2 The lifting plate 10 can be moved up and down directly by the telescopic cylinder 25. The telescopic cylinder 25 can be an electric telescopic rod or a hydraulic telescopic rod, preferably a hydraulic telescopic rod.

[0057] In one preferred embodiment, a stop bar 23 for limiting the thin plate 8 is fixed to the top of the work frame 1, and the height of the stop bar 23 is higher than the thickness of the thin plate 8.

[0058] For details, please refer to [link / reference]. Figure 8 The baffle 23 can be used to assist in the placement of the thin plate 8, so that one side can rest against the baffle 23. It can also be set on both sides of the work frame 1, so that the work frame 1 forms a groove that can accommodate the thin plate 8, making its placement more accurate.

[0059] In one preferred embodiment, the baffle 23 is fixed with a plurality of protrusions 24 near the outer wall of the forming roller 7.

[0060] In the above, since the thin plate 8 will tilt upwards on both sides when it is squeezed by the forming column 12, in order to reduce the contact area between the thin plate 8 and the baffle 23, a protrusion 24 is provided. This can reduce the contact area between the thin plate 8 and the baffle 23, and also achieve the effect of auxiliary positioning.

[0061] The standard parts used in this embodiment can be purchased directly from the market, while the non-standard structural parts described in the specification and drawings can be processed directly based on existing technical knowledge without any doubt. At the same time, the connection methods of each component adopt mature conventional methods in the existing technology, and the machinery, parts and equipment all adopt conventional models in the existing technology, so they will not be described in detail here.

[0062] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sheet bending forming apparatus comprising a work frame (1), characterized in that, Also includes: Two forming rollers (7) are slidably mounted on the inner frame of the work frame (1) for forming the outer wall of the sheet (8); The lifting plate (10) is located above the middle of the two forming rollers (7). The bottom of the lifting plate (10) is fixed with an integrally formed fixing part (11) and a forming column (12), and the forming column (12) is used to extrude and form the inner wall of the thin plate (8). A connector is used to control the two forming rollers (7) to move closer or further apart from each other; The drive unit is used to drive the lifting plate (10) to move up and down. When the forming column (12) moves down and its center position is lower than the center height of the two forming rollers (7), the connector controls the two forming rollers (7) to move closer to each other. The connector includes a slide groove (2) formed on the inner wall of both sides of the work frame (1). Two sliders (3) are slidably installed on the inner wall of each of the two slide grooves (2). The outer walls of the two sliders (3) in the same slide groove (2) are respectively connected to the inner walls of both sides of the slide groove (2) by tension springs (4). Two forming rollers (7) are respectively installed between the two sliders (3) on the same side of the two slide grooves (2). The outer walls of the two sliders (3) are rotatably connected to connecting rods (5), and the opposite ends of the two connecting rods (5) are rotatably connected by connecting pins (6). The connector also includes a vertical plate (13) fixed to the bottom of the lifting plate (10). The bottom of the vertical plate (13) is provided with an arc-shaped notch (14). When the center of the forming column (12) and the center of the forming roller (7) are on the same horizontal line, the connecting pin (6) is inserted into the arc-shaped notch (14) and contacts and abuts against its inner wall. The inner walls on both sides of the chute (2) are fixed with blocks (22) for limiting the forming roller (7), and the distance between the blocks (22) on both sides and the inner walls on both sides of the chute (2) is equal. The top of both sides of the work frame (1) is fixed with a support plate (15), and the top of the two support plates (15) is fixed with a top plate (9). The outer walls of the two support plates (15) are provided with vertical grooves (16), and a blocking plate (17) is slidably installed between the two vertical grooves (16). The blocking plate (17) and the inner bottom of the two vertical grooves (16) are connected with springs (18). When the thin plate (8) is bent into a U-shape, its folded end will not contact the blocking plate (17). The middle part of the fixing part (11) is provided with a through groove that allows the blocking plate (17) to pass through and move.

2. The sheet bending forming apparatus according to claim 1, characterized by: The two forming rollers (7) are rotatably connected to the slider (3).

3. The sheet bending forming apparatus according to claim 2, characterized by: A horizontal bar (21) is horizontally slidably installed at the bottom of the top plate (9) on both sides of the lifting plate (10). A vertical bar (19) is fixed at the top of both sides of the blocking plate (17). The top of the two vertical bars (19) is rotatably connected to the two horizontal bars (21) by a middle bar (20). An inclined surface is opened at the opposite end of the two horizontal bars (21). When the lifting plate (10) moves up and contacts the inclined surface, it will push the two horizontal bars (21) away from each other.

4. The sheet bending forming apparatus according to claim 3, characterized by: The drive unit includes a telescopic cylinder (25) fixed to the top of the top plate (9), and the telescopic end of the bottom of the telescopic cylinder (25) passes through the top plate (9) and is fixedly connected to the lifting plate (10).

5. The sheet bending forming apparatus according to claim 1, wherein: The top of the work platform (1) is fixed with a stop bar (23) for limiting the thin plate (8), and the height of the stop bar (23) is higher than the thickness of the thin plate (8).

6. The sheet bending forming apparatus according to claim 5, wherein: The baffle (23) has multiple protrusions (24) fixed near the outer wall of the forming roller (7).

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