Manual thin plate flanging machine

Abstract

The utility model relates to a manual sheet flanging machine in the field of metal processing devices, which is characterized in that a horizontal edge of a lower die holder is horizontally mounted on a rack, and a lower die is mounted at the top of a vertical edge of the lower die holder; the lower die is in an L shape, the horizontal edge of the lower die is fixed to the lower die base, and the vertical edge of the lower die is close to the vertical edge of the lower die base. A baffle is installed between the two side plates, a slit is reserved between the baffle and the vertical edge of the lower die, and an adjustable positioning mechanism is arranged below the slit. Two swing rods are hinged to the side plate, the two swing rods are further hinged to a translation rod respectively, four hinge points on the two swing rods are arranged in a parallelogram shape, any swing rod is connected with a handle, and an L-shaped upper die is fixed to the lower side of the end, extending out of the parallelogram, of the translation rod; when the handle is pulled towards one side of the lower die, the upper die and the lower die jointly bend and form the upper end of the workpiece inserted in the slit. According to the device, edge folding processing is convenient, the plate is convenient to position and place, and the device is suitable for thin plate edge folding processing during can manufacturing.

Description

TECHNICAL FIELD

[0001] The utility model relates to a metal processing device, in particular to a simple sheet folding machine for can making. BACKGROUND

[0002] The existing packaging can body is usually cut into a rectangular plate by thin coiled plate when manufacturing, then printing is carried out on the plate, and then round rolling, seam welding, bottom cover installation are carried out, and after loading material, top cover packaging is carried out. In the production process of the packaging can, the bending machine is usually used for edge folding processing when the can body, the can bottom and the can cover are manufactured and the connecting part is manufactured.

[0003] A manual aluminum buckle plate bending machine is disclosed in the Chinese patent database, the publication number of which is CN211489132U, and the publication date is September 15, 2020. The device includes a bending machine body, which includes a base plate that is a rectangular plate body. The two ends of the base plate are vertical plates that are symmetrically bent 90°, forming a bending machine rack. Longitudinal support blocks are symmetrically installed on the left and right sides of the bottom of the base plate and are fixed by screws. The upper ends of the two vertical plates are symmetrically provided with circular shaft holes, and a whole cylindrical rotating shaft penetrates through the two shaft holes. The rotating shaft is welded with rotating shaft limiting devices at both ends. A pressing plate is welded on the rotating shaft between the two vertical plates, and the pressing plate is a continuously bent whole plate. The lower end of the pressing plate is provided with an opening corresponding to the size of the aluminum buckle plate, forming a fixed aluminum buckle plate mechanism.

[0004] The disadvantages are that the edge folding processing usually needs to position the plate to ensure the processing accuracy, the device cannot achieve good positioning, resulting in time-consuming and laborious positioning, and in addition, the adaptability of the device to plate processing of different thicknesses is poor. INVENTION CONTENTS

[0005] The utility model aims to provide a kind of manual sheet folding machine, so that it can adapt to the sheet folding of different thickness, and its positioning is convenient, and processing is fast.

[0006] The utility model discloses a manual sheet edge folding machine, including the frame, the frame is provided with two mutually parallel side plates of vertical setting, be equipped with the lower die holder on the frame, the horizontal edge of lower die holder is installed on the frame, and the vertical edge top of lower die holder is equipped with lower die, the lower die is L-shaped, and the horizontal edge of lower die is fixed with lower die holder, and the vertical edge of lower die is close to the vertical edge of lower die holder, the two side plates are equipped with the baffle between the installation, and the vertical edge between baffle and lower die is left with the slit that only contains work piece insertion, and the adjustable positioning mechanism for holding work piece is equipped under the slit, the side plate is hinged with two swing rods, and two swing rods are also respectively with the hinge of horizontal rod, and four hinge points on two swing rods are parallel quadrilateral setting, and the handle is connected on any swing rod, and the horizontal rod extends to the lower side fixed with the upper die of L-shaped one end outside parallelogram, when pulling the handle to one side of lower die, the upper die horizontal motion and gradually combine with lower die, and the work piece in the slit is bent and formed together to the upper end.

[0007] When working, first, the cut sheet work piece is inserted into the slit, and the work piece lower end is supported on the adjustable positioning mechanism, then, the handle is pulled to one side of lower die, and the horizontal rod, swing rod and side plate form a parallel quadrilateral linkage, so that the upper die moves horizontally, and the horizontal edge of upper die contacts the work piece first, and the work piece is bent by pushing, and the work piece is bent (edge folding) into shape by being pressed in the space formed by the upper die and lower die. Compared with the prior art, the utility model has the beneficial effects that: in the above edge folding process, the upper die and lower die can adapt to the processing of plate pieces with different thicknesses, the processing is convenient, the plate piece is easy to position and place, and thus the edge folding processing can be quickly completed. The device is particularly suitable for sheet edge folding processing during can making.

[0008] The utility model further improves, the adjustable positioning mechanism includes hand wheel, adjusting screw, spring, supporting wheel and friction pad, the vertical edge of lower die holder is equipped with the longitudinal sliding slot of through lower die holder, adjusting screw transversely passes through the longitudinal sliding slot, and hand wheel is installed at one end of adjusting screw through thread engagement, and the other end of adjusting screw is installed with supporting wheel, and supporting wheel is located just below the slit, and spring is sleeved on adjusting screw, and the spring is elastically supported between hand wheel and one side edge of longitudinal sliding slot, and the friction pad is located between the other side edge of longitudinal sliding slot and supporting wheel. The work piece is inserted into the slit from top to bottom, and the lower edge of work piece is supported on the surface of supporting wheel, and supporting wheel provides the lower limit position of work piece. By rotating hand wheel, the spring can be moderately loosened, and the spring still has certain elasticity after being moderately loosened by hand wheel rotation, so that the adjustable positioning mechanism will not be in free fall motion and directly fall to the bottom of longitudinal sliding slot, and it can still be kept in the original position, and only a small force is needed to drive it to move up and down, so as to adjust the position of supporting wheel. After being adjusted to the appropriate position, the hand wheel is locked, so that the position of supporting wheel is locked.

[0009] To further ensure stable positioning, the edge of the longitudinal groove facing the friction pad has a roughened friction surface, and the surface of the friction pad is also roughened. This structure ensures that the position of the support roller will not be easily moved after it is fixed, making the positioning reliable.

[0010] To prevent the adjusting screw from rotating when the handwheel is turned, the section of the adjusting screw passing through the longitudinal groove is square, with the side length of the square matching the width of the longitudinal groove. This prevents the adjusting screw from rotating, allowing the spring to be released via the handwheel, thus enabling the adjustable positioning mechanism to slide up and down.

[0011] To facilitate adjustment of the slit width, a horizontal groove is provided on the horizontal side of the lower mold base. The length of the horizontal groove is perpendicular to the vertical side of the lower mold base, and the horizontal groove is fixedly connected to the lower mold base by countersunk screws. Loosening the countersunk screws allows the lower mold base to slide along the horizontal groove. After changing the slit width, the countersunk screws are then tightened. Adjusting the slit width can accommodate the folding of thin plates of different thicknesses.

[0012] To prevent the upper die from scratching the workpiece surface during the folding process, the horizontal end of the upper die is an arc-shaped end.

[0013] A further improvement of this invention lies in that the vertical extension of the upper mold downwards is positioned such that when the handle is raised and passes the highest point, the vertical end of the upper mold just abuts against the side of a swing rod, forming a limit. This structure cleverly utilizes the upper mold to perform an additional function beyond molding; at this limiting position, the handle can remain stationary. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 for Figure 1 A magnified view of part A in the image.

[0016] Figure 3 for Figure 2 A schematic diagram of the structure after the workpiece is removed, showing the slit.

[0017] Figure 4 for Figure 1 A diagram showing how the corresponding handle is rotated to another position for folding.

[0018] Figure 5 for Figure 1 A partial structural diagram showing the completed folding process.

[0019] Figure 6 for Figure 5 A magnified view of part B in the image.

[0020] In the diagram, 1 is the frame, 2 is the lower mold base, 2a is the friction surface, 3 is the adjusting handwheel, 4 is the lower mold, 5 is the handle, 6 is the side plate, 7 is the horizontal slide, 8 is the longitudinal slide, 9 is the spring, 10 is the workpiece, 11 is the upper mold, 11a is the arc end, 12 is the translation rod, 13 is the swing rod, 14 is the baffle, 15 is the support roller, 16 is the slit, 17 is the countersunk screw, 18 is the friction pad, and 19 is the adjusting screw. Detailed Implementation

[0021] like Figures 1-6 As shown, a manual sheet metal bending machine includes a frame 1. Two parallel side plates 6 are erected on the frame 1. A lower die base 2 is provided on the frame 1. The horizontal side of the lower die base 2 is horizontally mounted on the frame 1, and a lower die 4 is mounted on the top of the vertical side of the lower die base 2. The lower die 4 is L-shaped, with its horizontal side fixed to the lower die base 2 and its vertical side close to the vertical side of the lower die base 2. A baffle 14 is installed between the two side plates 6, and a narrow slit 16, just large enough for a workpiece 10 to be inserted, is left between the baffle 14 and the vertical side of the lower die 4. An adjustable positioning mechanism for supporting the workpiece 10 is provided below the side plate 6; two swing rods 13 are hinged to the side plate 6, and the two swing rods 13 are also hinged to the translation rod 12 respectively. The four hinge points on the two swing rods 13 are arranged in a parallelogram. A handle 5 is connected to any swing rod 13. An L-shaped upper mold 11 is fixed to the lower side of the end of the translation rod 12 that extends outside the parallelogram. When the handle 5 is pulled to the side of the lower mold 4, the upper mold 11 translates and gradually combines with the lower mold 4, together bending the upper end of the workpiece 10 inserted in the slit 16 into shape.

[0022] The adjustable positioning mechanism includes a handwheel 3, an adjusting screw 19, a spring 9, a support roller 15, and a friction pad 18. A longitudinal groove 8 penetrating the lower mold base 2 is provided on its vertical side. The adjusting screw 19 passes laterally through the longitudinal groove 8. The handwheel 3 is threadedly engaged at one end of the adjusting screw 19, and the support roller 15 is mounted at the other end of the adjusting screw 19. The support roller 15 is located directly below the slit 16. The spring 9 is fitted onto the adjusting screw 19 and elastically supports the handwheel 3 between one edge of the longitudinal groove 8 and the longitudinal groove 8. The friction pad 18 is located between the other edge of the longitudinal groove 8 and the support roller 15. The workpiece 10 is inserted into the slit 16 from top to bottom, with its lower edge supported on the surface of the support roller 15, which provides the lower limit position for the workpiece 10. By rotating the handwheel 3, the spring 9 can be loosened to a certain extent. The function of the spring 9 is to maintain a certain elasticity after the handwheel 3 is loosened to a certain extent, so that the adjustable positioning mechanism will not fall directly to the bottom of the longitudinal slide groove 8 in a free fall. It can still remain in its original position and only requires a small force to drive it up and down, so as to adjust the position of the support roller 15. After adjusting to the appropriate position, the handwheel 3 is locked to lock the position of the support roller 15.

[0023] To further ensure the stable positioning, the longitudinal sliding groove 8 is provided with a roughened friction surface 2a on the edge of the side close to the friction pad 18, and the surface of the friction pad 18 is also roughened. The structure ensures that the position of the fixed supporting wheel 15 cannot be easily moved, so that the positioning is reliable.

[0024] To avoid the adjustment screw 19 from rotating along with the hand wheel 3, the partial section of the longitudinal sliding groove 8 through which the adjustment screw 19 passes is square-shaped, and the side length of the square is matched with the width of the longitudinal sliding groove 8, so that the adjustment screw 19 itself cannot rotate any more. Thus, the spring 9 can be loosened through the hand wheel 3, so that the adjustable positioning mechanism can slide up and down.

[0025] To facilitate the adjustment of the width of the slit 16, the horizontal sliding groove 7 is arranged on the horizontal edge of the lower die base 2, the length direction of the horizontal sliding groove 7 is perpendicular to the vertical edge of the lower die base 2, and the horizontal sliding groove 7 is fixedly connected with the lower die base 2 through the countersunk screw 17. After the countersunk screw 17 is loosened, the lower die base 2 can slide along the horizontal sliding groove 7, the width of the slit 16 is changed, and then the countersunk screw 17 is locked. The adjustment of the width of the slit 16 can adapt to the flanging processing of the thin plates with different thicknesses.

[0026] To avoid that the upper die 11 scratches the surface of the workpiece 10 during the flanging process, the horizontal end of the upper die 11 is arc-shaped end 11a.

[0027] The position where the vertical surface of the upper die 11 extends downward meets that, when the handle 5 is lifted and passes the highest point, the vertical end of the upper die 11 just abuts against the side surface of one swing lever 13, so that the limit position is formed. The structure ingeniously utilizes the upper die 11 to generate another action besides the forming, and in the limit position, the handle 5 can be kept from rotating any more.

[0028] In work, the cut thin plate workpiece 10 is first inserted into the slit 16, the lower end of the workpiece 10 is supported on the adjustable positioning mechanism, then the handle 5 is pulled to the side of the lower die 4, the parallel quadrilateral linkage mechanism is formed by the translating lever 12, the swing lever 13 and the side plate 6, so that the upper die 11 translates, the horizontal edge of the upper die 11 first contacts the workpiece 10, pushes the workpiece 10 to bend, the upper die 11 gradually combines with the lower die 4, the workpiece 10 is pressed in the space formed by the upper die 11 and the lower die 4, and the workpiece 10 is bent (flanged) into a shape. Compared with the prior art, the beneficial effects of the utility model lie in that, in the above flanging process, the upper die 11 and the lower die 4 can adapt to the processing of the plates with different thicknesses, the processing is convenient, the plates are conveniently positioned and placed by themselves, so that the flanging processing can be quickly completed. The device is particularly suitable for the flanging processing of the thin plates in the can making.

[0029] The L-shaped corner of the upper die 11 and the lower die 4 is not necessarily limited to a 90° angle, and can be other angles. For the convenience of folding and avoiding the springback deformation of the workpiece, when a 90° folded edge is needed, the folded edge angle is usually bent to 82-88°, and the angle is determined according to the springback amount. After demolding, it can be rebounded to 90°.

[0030] The utility model is not limited to the above-mentioned embodiment, on the basis of the technical scheme disclosed by the utility model, according to the disclosed technical content, the skilled in the art can make some replacement and deformation to some technical features without creative labor, and these replacement and deformation are all within the protection scope of the utility model.

Claims

1. A hand sheet flanging machine comprising a frame, two side plates being vertically arranged on the frame and parallel to each other, characterized in that: The lower die base is horizontally installed on the frame, and the vertical edge of the lower die base is provided with a lower die at the top; the lower die is L-shaped, and the horizontal edge of the lower die is fixed to the lower die base, and the vertical edge of the lower die is close to the vertical edge of the lower die base; a baffle is installed between the two side plates, and a gap for inserting the workpiece is left between the baffle and the vertical edge of the lower die, and an adjustable positioning mechanism for supporting the workpiece is arranged below the gap; two swing rods are hinged to the side plates, and the two swing rods are respectively hinged to a horizontal rod, four hinge points on the two swing rods are arranged in a parallelogram, a handle is connected to any swing rod, and the horizontal rod is fixed to an L-shaped upper die at the lower side of the end extending out of the parallelogram; when the handle is pulled to one side of the lower die, the upper die moves horizontally and gradually combines with the lower die to bend and form the upper end of the workpiece inserted in the gap.

2. A hand sheet flanging machine according to claim 1, characterized in that: The adjustable positioning mechanism comprises a hand wheel, an adjusting screw, a spring, a supporting wheel and a friction pad, the vertical edge of the lower die base is provided with a longitudinal sliding groove penetrating the lower die base, the adjusting screw penetrates the longitudinal sliding groove transversely, the hand wheel is threadedly engaged with one end of the adjusting screw, the supporting wheel is arranged at the other end of the adjusting screw, the spring is sleeved on the adjusting screw, the spring is elastically supported between the hand wheel and one side edge of the longitudinal sliding groove, and the friction pad is arranged between the other side edge of the longitudinal sliding groove and the supporting wheel.

3. A hand sheet flanging machine according to claim 2, characterized in that: The edge of the longitudinal sliding groove towards the friction pad is provided with a roughened friction surface, and the surface of the friction pad is also roughened.

4. A hand sheet flanging machine according to claim 2 or 3, characterised in that: The partial cross section of the adjusting screw penetrating the longitudinal sliding groove is square, and the side length of the square is matched with the width of the longitudinal sliding groove.

5. A hand sheet flanging machine according to any one of claims 1 to 3, characterized in that: The horizontal edge of the lower die base is provided with a horizontal sliding groove, the length direction of the horizontal sliding groove is perpendicular to the vertical edge of the lower die base, and the horizontal sliding groove is fixedly connected with the lower die base by a countersunk screw.

6. A hand sheet flanging machine according to any one of claims 1 to 3, characterized in that: The horizontal end of the upper die is arc-shaped.

7. A hand sheet flanging machine according to any one of claims 1 to 3, characterized in that: The position where the vertical surface of the upper die extends downwards satisfies that when the handle is lifted and passes the highest point, the end of the vertical surface of the upper die just abuts against the side surface of one swing rod to form a limit.

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