Scissor type forming device for double bent arc plates

Abstract

The utility model relates to the field of sheet metal processing, in particular to a shear type forming device of a double-bent arc plate, which comprises an arc-shaped frame, a bending roller, a swing rod and a rotating shaft, the arc-shaped frame is provided with a bent arc, the bending roller presses a plate on the arc-shaped frame, the swing rod is rotatably connected with the rotating shaft by taking the rotating shaft as a fulcrum, and one end of the swing rod with a short arm of force is fixed with the bending roller. According to the bending device, the distance between the two bent arcs of the arc-shaped frame is not changed, the precision of the relative distance between the two bent arcs of a product subjected to bent arc forming is ensured, the swing rod forms a labor-saving lever with the rotating shaft as the fulcrum, and more labor is saved when a technician conducts plate forming in a bare-handed mode.

Description

Technical Field

[0001] This utility model relates to the field of sheet metal processing, specifically a shear forming device for double-bend arc plates. Background Technology

[0002] Currently, sheet metal bending is generally achieved using specialized stamping dies. When specialized dies or equipment are unavailable, bending machines are used. Stamping dies are generally suitable for mass production with high consistency requirements. However, for new energy bus manufacturing, characterized by small batch sizes, high variability, and short production cycles, developing specialized bending dies for each production run would be too costly and unsuitable for producing differentiated double-curved panels. If a bending machine is used, only one curve can be bent at a time. For the double-curved panels of bus bending machines, it is difficult to guarantee the accuracy of the relative distance between the two curves. Utility Model Content

[0003] The technical problem this application aims to solve is to provide a high-precision and labor-saving scissor forming device for double-bend arc plates. In this application, the distance between the two arcs of the arc frame remains unchanged, ensuring the accuracy of the relative distance between the two arcs of the product after the arc is formed. The swing arm forms a labor-saving lever with the rotation axis as the fulcrum, making it easier for technicians to form the plate by hand.

[0004] The specific technical solution of this application is as follows: a shear forming device for a double-bent arc plate, comprising an arc frame, a bending roller, a swing rod and a rotating shaft. The arc frame is provided with a bend, the bending roller presses the plate material onto the arc frame, the swing rod is rotatably connected to the rotating shaft with the rotating shaft as the fulcrum, the shorter end of the swing rod is fixed to the bending roller, and the bending roller and the swing rod are a pair and are arranged opposite to each other.

[0005] Furthermore, the arc-shaped frames are a pair and arranged opposite to each other. The top and bottom surfaces of the arc-shaped frames are provided with arc-shaped holes, the curvature of which is consistent with that of the arc-shaped frames. The two ends of the bending roller are slidably connected to the arc-shaped holes.

[0006] Furthermore, it also includes a workbench, with an arc-shaped frame fixed on the workbench.

[0007] Furthermore, the arc-shaped frame is stacked, with the bottom arc-shaped frame fixed to the workbench, the outer arc edge of the arc-shaped frame fitting against the sheet metal, and each layer of arc-shaped frames being fixed and stacked together in a detachable manner.

[0008] More preferably, each layer of the arc frame has a pin hole at the same position, and a connecting pin passes through the pin hole of each layer of the arc frame.

[0009] More preferably, it also includes two support columns fixed on the worktable, and two rotating shafts respectively fixed on the support columns. The swing arm is a Z-shaped rod with one end longer than the other. The short end of the Z-shaped rod is fixed to the bending roller, and the turning point of the short end of the Z-shaped rod is fixed to the rotating shaft.

[0010] Preferably, it also includes a cross plate, the side of the cross plate facing the arc frame having two guide rail grooves, the guide rail grooves being rotatably connected to the long ends of the two swing rods respectively, and the long ends of the swing rods sliding in the guide rail grooves.

[0011] More preferably, it also includes a push rod and a mounting bracket. The mounting bracket is fixed on the worktable and has a through hole. The push rod passes through the through hole and is slidably connected to the mounting bracket. The height of the mounting bracket is the same as the height of the cross plate, and the end of the push rod is fixed to the cross plate.

[0012] Preferably, the device further includes a sleeve rod fitted around the outer circumference of the push rod, the sleeve rod being rotatably connected to the through hole, the sleeve rod having an internal thread, and the push rod having an external thread corresponding to the internal thread.

[0013] More preferably, it also includes a turntable and a crank, the crank being fixed at the edge of the turntable, and the turntable being fixedly connected to the sleeve rod.

[0014] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0015] In this application, the distance between the two curved arcs of the arc frame remains unchanged, ensuring the accuracy of the relative distance between the two curved arcs after the product is formed. The two swing arms form a scissor forming device that can form two curved arcs simultaneously, improving production efficiency. The swing arms form a force-saving lever with the rotation axis as the fulcrum. The end with the shorter lever arm is connected to the bending roller, which squeezes the sheet material to fit the arc frame and thus bends it into shape. Technicians can apply force to the sheet material by hand at the end with the longer lever arm. The entire scissor forming device is simple to operate and saves more effort. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0017] Figure 2 This is a partial structural diagram of the push rod and sleeve rod according to an embodiment of this application;

[0018] Figure 3 This is a schematic diagram of the arc-shaped frame according to an embodiment of this application;

[0019] Figure 4 This is a schematic diagram of the stacked arc-shaped frame according to an embodiment of this application;

[0020] Figure 5 This is a partial schematic diagram of the final bending state according to an embodiment of this application;

[0021] Figure 6 This is a schematic diagram of the swing arm state during the forward pushing process of the cross plate according to an embodiment of this application;

[0022] In the diagram: 1. Arc-shaped frame; 2. Bending roller; 3. Swing rod; 4. Rotating shaft; 5. Worktable; 6. Support column; 7. Cross plate; 8. Push rod; 9. Mounting bracket; 10. Sleeve rod; 11. Arc-shaped hole; 12. Pin hole; 71. Guide rail groove; 100. Sheet metal; 101. Turntable; 102. Handle. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0024] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0025] Example

[0026] Please see Figures 1 to 6 This embodiment provides a scissor-forming device for double-bent arc plates, including an arc frame 1, a bending roller 2, a swing arm 3, and a rotating shaft 4. The bending roller 2 presses the plate 100 onto the arc frame 1. The swing arm 3 is rotatably connected to the rotating shaft 4 with the rotating shaft 4 as the fulcrum. The shorter end of the lever arm of the swing arm 3 is fixed to the bending roller 2. The bending roller 2 and the swing arm 3 are a pair and are arranged opposite each other. The distance between the two arcs of the arc frame 1 remains unchanged, ensuring the accuracy of the relative distance between the two arcs after the arc is formed. The two swing arms 3 form a scissor-forming device that can form two arcs simultaneously, improving production efficiency. The swing arm 3 forms a force-saving lever with the rotating shaft 4 as the fulcrum. The shorter end of the lever arm is connected to the bending roller 2. The bending roller 2 squeezes the plate 100 to fit against the arc frame 1, thereby bending and forming it. Technicians can manually apply force at the longer end of the lever arm to form the plate 100. The entire scissor-forming device is simple to operate and saves more effort.

[0027] like Figure 1As shown, the arc-shaped frames 1 are a pair and arranged opposite each other. Arc-shaped holes 11 are provided on the top and bottom surfaces of the arc-shaped frames 1. The curvature of the arc-shaped holes 11 is consistent with that of the arc-shaped frames 1. The two ends of the bending roller 2 are slidably connected within the arc-shaped holes 11. Since the arc-shaped holes 11 are located on the arc-shaped frames 1, the distance from the arc-shaped holes 11 to the arc-shaped frames 1 is fixed. The bending roller 2 is connected within the arc-shaped holes 11, ensuring that the bending roller 2 stably presses the sheet material 100 onto the arc-shaped frames 1, thus improving the stability of the bending process.

[0028] This embodiment also includes a worktable 5, on which the arc-shaped frame 1 is fixed. The worktable 5 is provided with several holes to facilitate the fixed installation of the arc-shaped frame 1 through the holes, further improving the stability of bending and forming.

[0029] Please see Figure 3 and Figure 4 In this embodiment, the arc-shaped frame 1 is further categorized into layers. The bottom arc-shaped frame 1 is fixed to the worktable 5, and the outer arc edge of the arc-shaped frame 1 is attached to the sheet metal 100. Each layer of arc-shaped frames 1 is detachably fixed to each other. Each layer of arc-shaped frames 1 has a shape with a protruding lower end and a concave upper end. The protruding part of the upper arc-shaped frame 1 is embedded into the concave part of the lower arc-shaped frame 1 for fixation, and the protruding part of the bottom arc-shaped frame 1 is embedded into the hole of the worktable 5, which improves the stability of the stacked arc-shaped frames 1. The stacked arc-shaped frame 1 can adapt the number of arc-shaped frame layers according to the width of different sheet metal 100, thereby improving the adaptability of the scissor forming device.

[0030] More preferably, each layer of the arc-shaped frame 1 has a pin hole 12 at the same position, and a connecting pin passes through the pin hole 12 of each layer of the arc-shaped frame 1. The connecting pin is inserted into the pin hole 12 to further restrict and fix the stacked arc-shaped frames 1, thereby further improving the stability of bending and forming.

[0031] like Figure 1 and Figure 6 As shown, in a further preferred embodiment, it also includes two support columns 6, which are fixed to the rear worktable 5 of the arc-shaped frame 1. Two rotating shafts 4 are provided, each fixed to one of the support columns 6. The swing arm 3 is a Z-shaped rod with one end longer than the other. The short end of the Z-shaped rod is fixed to the bending roller 2, and the bend at the short end of the Z-shaped rod is fixed to the rotating shaft 4. The swing arm 3 uses different rotating shafts 4 as lever fulcrums, facilitating the layout and design of the scissor-forming device. The bent Z-shaped rod can shorten the space occupied by the lever arm and change the direction of the applied force, making the bending roller 2 and the arc-shaped frame 1 fit more closely.

[0032] like Figure 2 and Figure 5As shown, this embodiment also includes a cross plate 7. The side of the cross plate 7 facing the arc-shaped frame 1 is provided with two guide rail grooves 71. The guide rail grooves 71 are rotatably connected to the long ends of the two swing rods 3 respectively, and the long ends of the swing rods 3 slide within the guide rail grooves 71. During the forward movement of the cross plate 7, the long ends of the swing rods 3 in the guide rail grooves 71 slide relative to each other. Through the fulcrum, the short ends of the swing rods 3 drive the bending roller 2 to press the sheet material 100 for bending and forming. The two guide rail grooves 71 are divided into upper and lower layers so that the swing rods 3 do not interfere when they cross.

[0033] More preferably, it also includes a push rod 8 and a mounting bracket 9. The mounting bracket 9 is fixed on the worktable 5 and has a through hole. The push rod 8 passes through the through hole and is slidably connected to the mounting bracket 9. The height of the mounting bracket 9 is the same as the height of the cross plate 7, and the end of the push rod 8 is fixed to the cross plate 7. The mounting bracket 9 ensures that the push rod 8 and the swing rod 3 are on the same horizontal plane and provides stable support for the push rod 8, making it easier for the push rod 8 to apply force to the cross plate 7 to move the cross plate 7 forward, thereby performing bending and forming, making the forming process more labor-saving.

[0034] Preferably, the assembly further includes a sleeve 10 fitted around the outer circumference of the push rod 8, the sleeve 10 being rotatably connected to the through hole, and the sleeve 10 having an internal thread. The push rod 8 has an external thread corresponding to the internal thread. The sleeve 10 and push rod 8 are threadedly connected. During the forward or reverse rotation of the sleeve 10, the push rod 8 is affected by the thread and moves forward or backward toward the cross plate 7, improving the stability of bending and forming while converting the torque of the sleeve 10's rotation into the thrust of the push rod 8, further facilitating the operation of technicians. Furthermore, a motor can be used to drive the sleeve 10 to rotate, completing the forming process and improving automation.

[0035] More preferably, it also includes a turntable 101 and a crank 102, the crank 102 being fixed to the edge of the turntable 101, and the turntable 101 being fixedly connected to the sleeve rod 10. The turntable 101 and the crank 102 facilitate manual operation by technicians.

[0036] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0037] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A shear forming device for a double-bend arc plate, characterized in that, It includes an arc frame (1), a bending roller (2), a swing rod (3) and a rotating shaft (4). The arc frame (1) has a bend. The bending roller (2) presses the sheet material (100) onto the arc frame (1). The swing rod (3) is rotatably connected to the rotating shaft (4) with the rotating shaft (4) as the fulcrum. The shorter end of the lever arm of the swing rod (3) is fixed to the bending roller (2). The bending roller (2) and the swing rod (3) are a pair and are arranged opposite to each other.

2. The shear forming device for a double-bend arc plate according to claim 1, characterized in that, The arc-shaped frames (1) are a pair and are arranged opposite to each other. The top and bottom surfaces of the arc-shaped frames (1) are provided with arc-shaped holes (11). The arc of the arc-shaped holes (11) is consistent with that of the arc-shaped frames (1). The two ends of the bending roller (2) are slidably connected in the arc-shaped holes (11).

3. The shear forming device for a double-bend arc plate according to claim 1, characterized in that, It also includes a workbench (5), with an arc frame (1) fixed on the workbench (5).

4. The shear forming device for a double-bend arc plate according to claim 3, characterized in that, The arc frame (1) is stacked. The bottom arc frame (1) is fixed to the workbench (5). The outer arc edge of the arc frame (1) is attached to the plate (100). Each arc frame (1) is fixed to each other in a detachable manner.

5. The shear forming device for a double-bend arc plate according to claim 4, characterized in that, Each layer of the arc frame (1) has a pin hole (12) at the same position, and a connecting pin passes through the pin hole (12) of each layer of the arc frame (1).

6. The shear forming device for a double-bend arc plate according to claim 3, characterized in that, It also includes two support columns (6), which are fixed on the worktable (5). The rotating shaft (4) is set to two, which are respectively fixed on the support columns (6). The swing rod (3) is a Z-shaped rod with one end longer than the other. The short end of the Z-shaped rod is fixed to the bending roller (2), and the turning point of the short end of the Z-shaped rod is fixed to the rotating shaft (4).

7. The shear forming device for a double-bend arc plate according to claim 6, characterized in that, It also includes a cross plate (7), which has two guide rail grooves (71) on the side facing the arc frame (1). The guide rail grooves (71) are rotatably connected to the long ends of the two swing rods (3), and the long ends of the swing rods (3) slide in the guide rail grooves (71).

8. The shear forming device for a double-bend arc plate according to claim 7, characterized in that, It also includes a push rod (8) and a mounting bracket (9). The mounting bracket (9) is fixed on the workbench (5). The mounting bracket (9) has a through hole. The push rod (8) passes through the through hole and is slidably connected to the mounting bracket (9). The height of the mounting bracket (9) is the same as the height of the cross plate (7). The end of the push rod (8) is fixed to the cross plate (7).

9. The shear forming device for a double-bend arc plate according to claim 8, characterized in that, It also includes a sleeve (10) sleeved around the outer circumference of the push rod (8), the sleeve (10) being rotatably connected to the through hole, the sleeve (10) having an internal thread, and the push rod (8) having an external thread corresponding to the internal thread.

10. The shear forming device for a double-bend arc plate according to claim 9, characterized in that, It also includes a turntable (101) and a rocker arm (102), with the rocker arm (102) fixed at the edge of the turntable (101), and the turntable (101) fixedly connected to the sleeve rod (10).

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