Double flanging bending combined die

Abstract

The utility model discloses a kind of double fold edge bending combination die, including installation bottom plate, the side die block symmetrically sliding in its both sides, the clearance fit of semicircular groove, the lower die block and the upper die block of the elastic connection in pressing cavity, the matching slope of trapezoidal extrusion surface of lower die block and extrusion block forms motion conversion mechanism, when upper die block is pressed down and drives lower die block vertical displacement to semicircular die block center height, plate is constrained by side die block and forms acute angle bending;Continue to move down and then push extrusion block horizontal outward by extrusion surface, by pressing column, rotate semicircular die block and complete edge bending.The combination mechanism realizes the timing cooperation of acute angle folding in single stamping, eliminates multi-process space interference, integrated forming makes acute angle bending angle accurate and controllable, and elastic reset structure realizes the automatic homing of each movement unit.

Description

Technical Field

[0001] This utility model relates to the field of bending machine technology, specifically to a double-sided bending combination mold. Background Technology

[0002] Existing technology lacks an integrated mold capable of simultaneously performing symmetrical sharp-angle bending on both sides of a sheet material. Chinese patent CN217858155U specifically describes a push-type double-edge bending mold, including an upper mold and a lower mold located below it. The top of the lower mold has a first mounting groove and a second mounting groove. In this push-type double-edge bending mold, a right-angle sheet material is placed between the upper mold and the left mold. A cylinder pushes the upper mold, the right-angle sheet material, and the left mold downwards. The left mold also transmits power to the right mold, which can rotate counterclockwise around its bottom. At this time, the upper mold and the right mold press against each other, bending both sides of the right-angle sheet material simultaneously. However, this patent can only achieve single-sided sharp-angle bending at a time. Utility Model Content

[0003] The purpose of this utility model is to provide a double-folding bending combination mold, which has the advantage of being able to simultaneously complete the symmetrical sharp-angle bending of both sides of the sheet metal, meeting diverse production needs and solving the problems in the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A double-folding bending combination mold includes a mounting base plate. Two side mold blocks are symmetrically connected to both sides of the mounting base plate via wedge-shaped guide rails. A semi-circular groove extending axially is formed on the opposite side wall of each side mold block, and a semi-circular mold block is placed within the semi-circular groove. The two side mold blocks and the mounting base plate enclose a pressing cavity. A lower mold block is placed within the pressing cavity. The longitudinal section of the lower mold block is an isosceles trapezoid, wider at the top and narrower at the bottom, with its two inclined surfaces serving as extrusion surfaces. The mounting base plate and the lower mold block are connected by a first compression spring and a telescopic rod. Extrusion blocks are symmetrically arranged on both sides of the bottom of the pressing cavity. The longitudinal section of each extrusion block is a right-angled triangle, with its inclined surface serving as the extruded surface, the slope of which matches the extrusion surface. A pressing column is fixed to one end of the extrusion block facing the semi-circular mold block, and the end of the pressing column contacts the lower side wall of the semi-circular mold block. A second compression spring is provided between the contact surfaces of the extrusion block and the side mold blocks.

[0006] Preferably, the axis of the semicircular groove of the side mold block is parallel to the length direction of the mounting base plate, and the arc surface of the semicircular mold block is in clearance fit with the curved surface of the semicircular groove.

[0007] Preferably, a first connecting groove is provided on the mounting base plate, a second connecting groove is provided at the bottom of the lower mold block, the two ends of the telescopic rod are respectively fixed in the first connecting groove and the second connecting groove, and the first compression spring is coaxially sleeved on the outside of the telescopic rod.

[0008] Preferably, the bottom of the extrusion block is slidably connected to the mounting base plate via a wedge-shaped guide rail, and the sliding direction of the wedge-shaped guide rail of the extrusion block is perpendicular to the length direction of the mounting base plate.

[0009] Preferably, an upper die block is provided directly above the lower die block, and the upper die block is installed on the punch of the bending machine. The upper die block is an isosceles trapezoid that is narrower at the top and wider at the bottom.

[0010] Preferably, the width of the upper mold block is less than the width of the pressing cavity, and the difference is twice or more the thickness of the sheet material.

[0011] Preferably, the axis of the pressing column is parallel to the axis of rotation of the semi-circular mold block.

[0012] Preferably, the end of the pressing column has a spherical structure.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This invention completes the symmetrical acute-angle folding of the sheet metal in stages during a single stamping stroke. In the initial vertical downward movement of the lower die block, the sheet metal is first driven to form a right-angle bend. When it drops to the preset height, the extrusion surface contacts the extruded surface. At this time, the vertical motion is converted into the horizontal displacement of the extrusion block. The pressing column pushes the semi-circular die block to rotate and execute the rolling of the two sides of the sheet metal to form an acute-angle fold, thus eliminating the spatial interference between the downward pressing space required for the acute-angle bend and the lateral pressing motion. Attached Figure Description

[0015] Figure 1 This is an isometric view of the overall structure of this utility model;

[0016] Figure 2 This is a diagram of the overall structure of this utility model in its first bending state.

[0017] Figure 3 This is a diagram showing the second bending state of the overall structure of this utility model;

[0018] Figure 4 This is a diagram showing the overall structure of this utility model in its third bending state.

[0019] Figure 5 This is an isometric view of the extrusion block of this utility model;

[0020] Figure 6 This is an isometric view of the lower mold block of this utility model;

[0021] Figure 7 This is an isometric view of the semi-circular mold block of this utility model;

[0022] Figure 8 This is a diagram showing the completed sheet metal pressing process of this utility model.

[0023] In the diagram: 1. Mounting base plate; 2. Side mold block; 3. Semicircular groove; 4. Semicircular mold block; 5. Pressing cavity; 6. First connecting groove; 7. Lower mold block; 8. Telescopic rod; 9. First compression spring; 10. Second connecting groove; 11. Upper mold block; 12. Extrusion surface; 13. Extrusion block; 14. Pressing column; 15. Extruded surface; 16. Second compression spring; 17. Sheet metal. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] To address the issue in existing technologies that cannot simultaneously achieve sharp-angle folding on both sides of the sheet metal, the following technical solution is provided. Please refer to [link / reference]. Figure 1-8 ;

[0026] A double-folding bending combination mold includes a mounting base plate 1. The two sides of the mounting base plate 1 are connected to side mold blocks 2 via wedge-shaped guide rails. The two side mold blocks 2 are symmetrically distributed. Semicircular grooves 3 are formed on the opposite side walls of the side mold blocks 2. The semicircular grooves 3 extend in the same direction as the side mold blocks 2. The semicircular mold blocks 4 are fitted into the semicircular grooves 3 with a clearance fit. A pressing cavity 5 is formed between the two side mold blocks 2 and the mounting base plate 1. The sheet metal 17 will be bent and formed in the pressing cavity 5.

[0027] A lower mold block 7 is provided inside the pressing cavity 5. The sheet material 17 to be processed is placed on the upper surface of the lower mold block 7 inside the pressing cavity 5. The lower mold block 7 is connected to the mounting base plate 1 by a first compression spring 9. The first compression spring 9 is provided with a telescopic rod 8. A first connecting groove 6 is provided on the mounting base plate 1. A second connecting groove 10 corresponding to the position of the first connecting groove 6 is provided at the bottom of the lower mold block 7. The two ends of the first compression spring 9 and the telescopic rod 8 are respectively inserted into the first connecting groove 6 and the second connecting groove 10 and fixed. This arrangement allows the lower mold block 7 to contact the mounting base plate 1 when it is pressed by the upper mold block 11, so that the lower mold block 7 receives sufficient support from the mounting base plate 1, ensuring the stability of the mold and facilitating the bending and forming of the sheet material 17. The width of the upper mold block 11 is less than the width of the pressing cavity 5, and the difference is twice or more than the thickness of the sheet material 17, so as to reserve sufficient movement space for the sheet material 17.

[0028] The lower mold block 7 has a longitudinal section that is an isosceles trapezoid with a wider top and a narrower bottom, and its two inclined surfaces are extrusion surfaces 12. Extrusion blocks 13 are symmetrically arranged on both sides of the bottom of the pressing cavity 5. The longitudinal section of the extrusion block 13 is a right-angled triangle. The bottom of the extrusion block 13 is connected to the mounting base plate 1 via a wedge-shaped guide rail. The sliding direction of the wedge-shaped guide rail of the extrusion block 13 is perpendicular to the length direction of the mounting base plate 1. A pressing post 14 is provided on the side of the extrusion block 13 facing the semi-circular mold block 4, and the end of the pressing post 14 abuts against the lower side wall of the semi-circular mold block 4. The inclined surface of the extrusion block 13 is the extruded surface 15, and the slopes of the extrusion surface 12 and the extruded surface 15 are equal. Similarly, when the lower mold block 7 is pressed down, the extrusion surface 12 and the extruded surface 15 come into contact, causing the extrusion block 13 to move outward to both sides, and the lower half of the semi-circular mold block 4 is extruded by the pressing column 14; the contact surface between the extrusion block 13 and the side mold block 2 is provided with a second compression spring 16 and a groove for installing the second compression spring 16, and the extrusion block 13 can be reset by the second compression spring 16 after contacting the side mold block 2; the axis of the pressing column 14 is parallel to the rotation axis of the semi-circular mold block 4; the end of the pressing column 14 is a spherical structure, which facilitates the application of force to the semi-circular mold block 4 while reducing scratching of its surface.

[0029] The upper die block 11 is installed on the punch of the bending machine. Driven by the hydraulic cylinder, the upper die block 11 applies pressure to the sheet metal 17 placed on the lower die block 7 and bends it into shape. The upper die block 11 is an isosceles trapezoid with a narrow top and a wide bottom. The slope of its two inclined surfaces depends on the specified slope of the sheet metal 17 after bending.

[0030] This design aims to fold the sheet 17 into a wedge shape, meaning that the bent sheet 17 has three panels: a flat bottom and two sloping sides, with the angle between the sloping sides and the flat bottom forming an acute angle.

[0031] When the bending machine starts, the hydraulic cylinder drives the upper die block 11 to move downward, applying vertical pressure to the sheet metal 17 placed on the lower die block 7. The sheet metal 17 is forced to deform, simultaneously pushing the lower die block 7 downward along the telescopic rod 8, at which point the first compression spring 9 is compressed. The extrusion surface 12 of the lower die block 7 contacts the extruded surface 15 of the extrusion block 13, converting the vertical pressure into a horizontal component force, forcing the extrusion block 13 to slide outward along the wedge-shaped guide rail of the mounting base plate 1 towards the outside of the pressing cavity 5.

[0032] The horizontal displacement of the extrusion block 13 causes the pressing column 14 at its end to push the lower half of the semi-circular mold block 4, causing the semi-circular mold block 4 to rotate within the semi-circular groove 3. During this process, the second compression spring 16 between the extrusion block 13 and the side mold block 2 is compressed and stores energy.

[0033] When the upper mold block 11 returns to its starting position, the first compression spring 9 releases its elastic force, pushing the lower mold block 7 back to its initial height. Simultaneously, the second compression spring 16 drives the extrusion block 13 to slide back along the wedge-shaped guide rail into the pressing cavity 5, and the pressing column 14 disengages from pushing the semi-circular mold block 4. The semi-circular mold block 4 then returns to its original position under gravity or elastic force. At this point, the double-edge processing of the sheet metal 17 is complete, and the molded part can be removed.

[0034] Working principle: In the initial state, the bottom surface of the lower mold block 7 is at the same horizontal plane as the center of the semi-circular mold block 4. When bending starts, the upper mold block 11 presses down on the plate 17, forcing the lower mold block 7 to move downward along the telescopic rod 8 and compress the first compression spring 9. When the top surface of the lower mold block 7 drops to the same height as the center of the semi-circular mold block 4, the plate 17 is vertically limited by the side mold blocks 2 on both sides, forming right-angle bends on both sides in the pressing cavity 5.

[0035] At this point, the lower die block 7 continues to move downwards, and its extrusion surface 12 begins to contact the extruded surface 15 of the extrusion block 13. Because the slopes of the two inclined planes are strictly matched, the vertical movement of the lower die block 7 is converted into the horizontal outward movement of the extrusion block 13 along the wedge-shaped guide rail of the mounting base plate 1. The extrusion block 13 drives the pressing column 14 to push the lower half of the semi-circular die block 4, forcing the semi-circular die block 4 to rotate around the center of the semi-circular groove 3.

[0036] When the semi-circular mold block 4 rotates, its upper half swings towards the inside of the pressing cavity 5, pressing the two sides of the plate 17 tightly onto the inclined side of the upper mold block 11, simultaneously completing the edge rolling and forming. During this process, the second compression spring 16 between the extrusion block 13 and the side mold block 2 is compressed and stores energy.

[0037] After the upper mold block 11 returns to its starting position, the first compression spring 9 pushes the lower mold block 7 back to its initial height. At the same time, the second compression spring 16 releases its elastic force, causing the extrusion block 13 to move horizontally inward and reset. The pressing column 14 disengages from the semi-circular mold block 4, and the semi-circular mold block 4 rotates back to its initial angle under the action of gravity. At this point, the finished double-folded sheet material 17 can be removed.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the present 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 present invention.

Claims

1. A double-folding bending combination mold, comprising a mounting base plate (1), characterized in that, The mounting base plate (1) is symmetrically connected to two side mold blocks (2) via wedge-shaped guide rails. A semi-circular groove (3) extending axially is provided on the opposite side wall of each side mold block (2), and a semi-circular mold block (4) is provided within the semi-circular groove (3). The two mold blocks (2) and the mounting base plate (1) enclose a pressing cavity (5). A lower mold block (7) is provided within the pressing cavity (5). The longitudinal section of the lower mold block (7) is an isosceles trapezoid, wider at the top and narrower at the bottom, with its two inclined surfaces forming extrusion surfaces (12). The mounting base plate (1) and the lower mold block (7) are connected by a first pressing... The compression spring (9) and the telescopic rod (8) are connected; the pressing chamber (5) is symmetrically arranged with extrusion blocks (13) on both sides of the bottom. The longitudinal section of the extrusion block (13) is a right triangle, and the inclined surface is the extruded surface (15). The slope of the extruded surface (15) matches the extrusion surface (12); the end of the extrusion block (13) facing the semi-circular mold block (4) is fixed with a pressing column (14), and the end of the pressing column (14) contacts the lower side wall of the semi-circular mold block (4); a second compression spring (16) is arranged between the contact surface of the extrusion block (13) and the side mold block (2).

2. The double-folding bending combination mold according to claim 1, characterized in that, The axis of the semicircular groove (3) of the side mold block (2) is parallel to the length direction of the mounting base plate (1), and the arc surface of the semicircular mold block (4) is in clearance fit with the curved surface of the semicircular groove (3).

3. The double-folding bending combination mold according to claim 2, characterized in that, The mounting base plate (1) has a first connecting groove (6), the bottom of the lower mold block (7) has a second connecting groove (10), the two ends of the telescopic rod (8) are fixed in the first connecting groove (6) and the second connecting groove (10) respectively, and the first compression spring (9) is coaxially sleeved on the outside of the telescopic rod (8).

4. The double-folding bending combination mold according to claim 3, characterized in that, The bottom of the extrusion block (13) is slidably connected to the mounting base plate (1) via a wedge-shaped guide rail, and the sliding direction of the wedge-shaped guide rail of the extrusion block (13) is perpendicular to the length direction of the mounting base plate (1).

5. The double-folding bending combination mold according to claim 4, characterized in that, The upper mold block (11) is located directly above the lower mold block (7). The upper mold block (11) is installed on the punch of the bending machine. The upper mold block (11) is an isosceles trapezoid that is narrow at the top and wide at the bottom.

6. A double-folding bending combination mold according to claim 5, characterized in that, The width of the upper mold block (11) is less than the width of the pressing cavity (5), and the difference is twice or more the thickness of the plate (17).

7. A double-folding bending combination mold according to claim 6, characterized in that, The axis of the pressing column (14) is parallel to the rotation axis of the semi-circular mold block (4).

8. A double-folding bending combination mold according to claim 7, characterized in that, The end of the pressing column (14) has a spherical structure.

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