Die assembly for bending apparatus

Abstract

The utility model discloses a mould assembly for bending equipment, including top die and bottom die, the top die has the pressure camber surface of cross section arc line shape, when using pressure camber surface is towards bottom die, bottom die has the shaping surface I and shaping surface II of angle, when using shaping surface I and shaping surface II are towards top die, when using, pressure camber surface is located between shaping surface I and shaping surface II, the top die and / or bottom die are driven to make pressure camber surface and shaping surface I and shaping surface II close or far away, can promote the quality of bending board to improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of sheet metal bending processing, and specifically to a mold assembly for bending equipment. Background Technology

[0002] With rapid economic development and accelerated urbanization, the amount of urban domestic waste has increased dramatically, leaving more and more waste awaiting disposal. Incinerators, with their unique advantages, are widely used in China, and expansion joints are one of the important components of incinerators. The production of expansion joints requires cutting thin-walled steel plates into sheets of appropriate widths, and then bending the steel plates according to the drawings.

[0003] Since the existing bending machine in the workshop can only bend steel plates to 90°, while the expansion joint can bend at 60°, the current operating method is to place the thin-walled steel plate horizontally on the operating platform after cutting, mark the bending position according to the drawing, and then use an acetylene flame to heat the bending position of the thin-walled steel plate. After heating to a certain temperature, the heated thin-walled steel plate is then placed against a work platform with an angle of 60 degrees, and the thin-walled steel plate is bent forcefully using tools. After the thin-walled steel plate cools down, it is flipped over and the above steps are repeated to achieve the purpose of bending the thin-walled steel plate into an S-shape and making the thin-walled steel plate into an expansion joint.

[0004] Existing methods require separate heating, bending, and cooling steps, which are time-consuming and inefficient. Heating the steel plate can easily cause it to deform, altering its mechanical properties and shape, which affects the quality of the bent plate and makes it difficult to guarantee the accuracy of the finished product's dimensions. Consequently, the performance and dimensions of the produced expansion joints are difficult to control.

[0005] To address these issues, a mold assembly for bending equipment is needed that can improve the quality of the bent sheet and increase production efficiency. Utility Model Content

[0006] In view of this, the purpose of this utility model is to overcome the defects in the prior art and provide a mold assembly for bending equipment that can improve the quality of the expansion joints and increase production efficiency.

[0007] The present invention relates to a mold assembly for a bending device, comprising a top mold and a bottom mold. The top mold has a pressing surface with an arc-shaped cross-section, and the pressing surface faces the bottom mold during use.

[0008] The bottom mold has an angled shaping surface I and a shaping surface II, which face the top mold during use.

[0009] In use, the pressing surface is located between the shaping surface I and the shaping surface II, and the top mold and / or bottom mold is driven to bring the pressing surface closer to or further away from the shaping surface I and the shaping surface II.

[0010] Furthermore, on the cross-section, the shaping surface I and shaping surface II are respectively tangent to the pressure arc surface.

[0011] Furthermore, the shaping surface I and shaping surface II form a 60° angle, and the sharp angle of the angle between the shaping surface I and shaping surface II is away from the pressure arc surface.

[0012] Furthermore, the top mold includes a fixed bracket and an arc-pressing component. The fixed bracket is disposed on the arc-pressing component, and the arc-pressing surface is located on the arc-pressing component. The fixed bracket has a connecting end for setting at a preset position.

[0013] Furthermore, the arc-pressing component is elongated, and the fixing bracket consists of several components disposed on the arc-pressing component.

[0014] Furthermore, the top mold includes a connector for setting the fixing bracket at a preset position; the fixing bracket includes a left fixing plate and a right fixing plate disposed opposite to each other on the lateral sides of the arc-pressing component;

[0015] The connector passes through the left and right fixing plates to fix the bracket in a preset position.

[0016] Furthermore, the left fixing plate has a left wing plate, the right fixing plate has a right wing plate, and the fixing bracket also includes a top plate that spans the arc-pressing member and is detachably connected to the left and right wing plates.

[0017] A limiting groove that is closed in cross section is formed between the top plate, the left fixing plate, the right fixing plate and the arc pressing component.

[0018] Furthermore, the bottom mold includes an H-beam and shaping plates I and II disposed in a recess on the upper part of the H-beam. Shaping plates I and shaping plates II are at an angle, and the side of shaping plate I facing shaping plate II is shaping surface I, and the side of shaping plate II facing shaping plate I is shaping surface II.

[0019] Furthermore, the bottom mold also includes a bottom plate, a left support plate, and a right support plate. The bottom plate is disposed at the bottom of the H-beam, and the left and right support plates are disposed on the two sides of the H-beam respectively, and each connects the H-beam and the bottom plate accordingly.

[0020] This solution also discloses a bending device for sheet metal, including the aforementioned mold assembly, and a bending machine, wherein the bending machine has a pressure block that is driven to move up and down and a worktable located at the bottom of the pressure block; the top mold of the bending die is disposed on the pressure block, and the bottom mold of the bending die is disposed on the worktable.

[0021] The beneficial effects of this utility model are as follows: The mold assembly for bending equipment disclosed in this utility model is made by directly using workshop materials to make the mold assembly. The top mold and bottom mold are installed on the corresponding positions of the bending machine to produce the expansion joint by stamping. Because a mold is used and there is no need to heat the steel plate, the performance and dimensions of the produced bending plate can meet the requirements. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0023] Figure 1 This is a schematic diagram of the bending machine of this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the mold assembly of this utility model on the pressure block and worktable of the bending machine;

[0025] Figure 3 This utility model Figure 2 Front view structural diagram;

[0026] Figure 4 This utility model Figure 2 A schematic diagram of the side view structure;

[0027] Figure 5 This is a schematic diagram of the mold assembly of this utility model;

[0028] Figure 6 This utility model Figure 5 Front view structural diagram;

[0029] Figure 7 This utility model Figure 5 A side view structural diagram. Detailed Implementation

[0030] Figure 1 As shown in the schematic diagram of this utility model, the mold assembly for the bending device in this embodiment includes a top mold 001 and a bottom mold 002. The top mold 001 has a pressing surface with an arc-shaped cross-section. The arc shape includes any curved line segment on a circle or ellipse; or a continuous curved curve formed by connecting a series of points; or composed of several arc segments, etc., which will not be elaborated here. In use, the pressing surface faces the bottom mold 002. The pressing surface is used to form a predetermined arc on the steel plate being pressed, so as to form a corresponding shape.

[0031] The top mold 001 includes a fixed bracket and an arc-pressing component. The fixed bracket is disposed on the arc-pressing component, and the arc-pressing surface is located on the arc-pressing component. The fixed bracket has a connecting end for setting at a preset position.

[0032] In this embodiment, the preset position is the pressure block 003 of the bending machine. In actual application, it can also be the pressure head 9 of the pressing equipment or the pressure end of the pressure equipment, etc., which will not be described in detail here.

[0033] The pressing component is elongated and includes a rod-shaped main pressing head and a rectangular strip-shaped connecting head 2. The main pressing head is located at the bottom of the connecting head 2, and the two are parallel to each other. The pressing surface is the lower half of the semi-circular arc shape of the outer surface of the main pressing head. By adjusting the diameter or angle of the main pressing head in the pressing component, the curvature of the pressing surface can correspond to the curvature of different bending positions of the sheet metal. It should be understood that the main pressing head can be designed as a detachable structure or a fixed structure. This solution uses a main pressing head with a fixed diameter, which is suitable for batch production and continuous bending of sheet metal.

[0034] In this embodiment, the fixing bracket includes a left fixing plate 3 and a right fixing plate 4 disposed opposite to each other on the lateral sides of the arc-pressing component. The left fixing plate 3 has a left wing plate 5, and the right fixing plate 4 has a right wing plate 6. Specifically, the left fixing plate 3 and the right fixing plate 4 are connected to the lateral sides of the connector 2 and are located at the top of the main pressure head. The top end of the left fixing plate 3 is bent to the left and extends to form the left wing plate 5, and the top end of the right fixing plate 4 is bent to the right and extends to form the right wing plate 6. The arc-pressing component is a steel component, and the left fixing plate 3 and the right fixing plate 4 are L-shaped steel plates welded onto the arc-pressing component.

[0035] In this embodiment, the fixed bracket also includes a top plate 7 that spans the arc-pressing component and is detachably connected to the left wing plate 5 and the right wing plate 6. Specifically, the top plate 7 is detachably connected to the left wing plate 5 and the right wing plate 6 by bolts, which achieves the purpose of quick disassembly and assembly, and has flexibility and better fastening, making the upper mold structure stronger and suitable for continuous operation.

[0036] In this embodiment, a limiting groove 8 that is closed in cross section is formed between the top plate 7, the left fixing plate 3, the right fixing plate 4 and the arc pressing component; the top mold 001 includes a connector (not shown in the figure) for setting the fixing bracket in a preset position; the connector passes through the left fixing plate 3 and the right fixing plate 4 to set the fixing bracket in the preset position;

[0037] Specifically, the connector includes bolts that pass through the left fixing plate 3 and the right fixing plate 4 laterally.

[0038] In this embodiment, the pressure block 003 of the bending machine includes a pressure head 9, a force transmission block 10 and a pressure plate 11. The pressure plate 11 is disposed at the bottom of the pressure head 9 through a plurality of force transmission blocks 10. There is an installation gap between adjacent force transmission blocks 10. The force transmission blocks 10 are assembled with the pressure head 9 and the pressure plate 11 by bolts.

[0039] In use, the limiting groove 8 is inserted upwards into the pressure plate 11, so that the left fixing plate 3 and the right fixing plate 4 clamp the pressure plate 11. The bottom of the pressure plate 11 abuts against the top of the connector 2. Using bolts passing through the left fixing plate 3 and the right fixing plate 4, the top mold is fixed to the pressure head 9 of the bending machine. Then, the top plate 7 is passed through the installation gap and installed on the left wing plate 5 and the right wing plate 6 respectively using the remaining bolts. The structure has higher strength and is more stable in use.

[0040] When the bending machine drives the pressure block 003, it also drives the top die simultaneously, and uses existing technology to realize the up and down movement of the top die as well as the adjustment of speed, pressure, etc.

[0041] In this embodiment, the fixed brackets are a plurality of components evenly distributed on the arc-pressing component. Each fixed bracket has a corresponding installation gap in its top plate 7. The arc-pressing component is positioned at the bottom of the bending machine pressure block 003 along the length of the pressure plate 11. This arrangement is intended to ensure that the top die is more securely fixed to the bending machine when bending longer thin-walled steel plates, while also ensuring more uniform force application to guarantee the bending quality of the thin-walled steel plate.

[0042] In this embodiment, the bottom mold 002 is set on the worktable 004 of the bending machine during use, and the bottom mold 002 and the top mold 001 are opposite each other. The bottom mold 002 has a shaping surface I and a shaping surface II at an angle. During use, the shaping surface I and the shaping surface II face the top mold 001. On the cross section, the shaping surface I and the shaping surface II are respectively tangent to the pressure arc surface. This tangency means that the top mold and the bottom mold are tangent after they are closed. The shaping surface I and the shaping surface II are smoothly transitioned through the pressure arc surface to ensure that the bent plate forms a predetermined bending shape along the pressure arc surface and the shaping surface I and the shaping surface II. The bending angle is the angle between the shaping surface I and the shaping surface II, which is 60° in this solution.

[0043] In this embodiment, the bottom mold 002 includes an H-beam 12 and shaping plates I 16 and II 17 disposed in a recess on the upper part of the H-beam 12. The shaping plates I 16 and II 17 are at an angle, and the side of the shaping plate I 16 facing the shaping plate II 17 is the shaping surface I, and the side of the shaping plate II 17 facing the shaping plate I 16 is the shaping surface II. The shaping surface I and shaping surface II form a 60° angle, and the sharp corner of the angle formed by the shaping surface I and shaping surface II points downward and away from the pressure arc surface.

[0044] Specifically, the upper edge of the shaping plate I 16 is connected to the left top edge of the H-beam 12, and the lower edge is connected to the web of the H-beam 12 and approaches the middle of the web. The upper edge of the shaping plate II 17 is connected to the right top edge of the H-beam 12, and the lower edge is connected to the web of the H-beam 12 and approaches the middle of the web. There is a gap between the lower edges of the shaping plate I 16 and the lower edges of the shaping plate II 17, so that when the top mold and the lower mold are closed, the thin-walled steel plate can be bent according to the predetermined curvature and bending angle, thereby improving the processing quality.

[0045] In this embodiment, the bottom mold 002 further includes a bottom plate 13, a left support plate 14, and a right support plate 15. The bottom plate 13 is disposed at the bottom of the H-beam 12, and the left support plate 14 and the right support plate 15 are respectively disposed on both sides of the H-beam 12, and each connects the H-beam 12 and the bottom plate 13 accordingly.

[0046] Specifically, the bottom of the H-beam 12 is set on the base plate 13. The left support plate 14 connects the left end edge of the base plate 13 to the left top edge of the H-beam 12. The left support plate 14 and the shaping plate I 16 are opposite each other at the left top edge of the H-beam 12, ensuring structural strength. The right support plate 15 connects the right end edge of the base plate 13 to the right top edge of the H-beam 12. The right support plate 15 and the shaping plate II 17 are opposite each other at the right top edge of the H-beam 12, ensuring structural strength. The left support plate 14 and the right support plate 15 form a 60° angle, creating a multi-triangular load-bearing structure. The apex of the angle formed by the left support plate 14 and the right support plate 15 points upwards towards the pressure arc surface. This arrangement can support a certain weight when the lower mold is under load, ensuring that the bending angle is not easily deformed and improving processing quality.

[0047] Among them, the shaping plate I 16, shaping plate II 17, bottom plate 13, left support plate 14, and right support plate 15 are all long strip steel plates, which are welded onto the H-beam 12. The materials for the top mold and the bottom mold of this scheme are readily available, the mold manufacturing is simple, the production cost is low, and it can improve production efficiency and has better economic benefits.

[0048] In use, the pressing surface is located between shaping surface I and shaping surface II. The top die 001 and / or bottom die 002 are driven to bring the pressing surface closer to or away from shaping surface I and shaping surface II. The "and / or" means that the top die 001 or the bottom die 002 is driven individually to move closer to or away from the corresponding side, or they can be driven simultaneously to move closer to or away from each other. In this solution, the bottom die 002 is placed on the worktable 004 of the bending machine, and the top die 001 is set on the pressure block 003 of the bending machine. The top die 001 and the bottom die 002 are opposite each other, and the top die 001 is driven with the pressure block 003 to move closer to or away from the bottom die 002.

[0049] This solution also discloses a bending device for sheet metal, including the aforementioned mold assembly and a bending machine. The bending machine has a pressure block 003 that is driven to move up and down and a worktable 004 located at the bottom of the pressure block 003. The top mold 001 of the bending die is disposed on the pressure block 003, and the bottom mold 002 of the bending die is disposed on the worktable 004. To meet the requirements, this solution directly utilizes workshop materials to manufacture the mold assembly, and the bending machine is also an existing structure in the workshop. The manufactured top mold 001 and bottom mold 002 are respectively installed in the corresponding positions of the bending machine to produce expansion joints by stamping. Because molds are used and there is no need to heat the steel plate, the performance and dimensions of the produced bent sheet metal meet the requirements.

[0050] Specifically, during operation, the operator installs the top die onto the pressure block 003 of the bending machine, and places the lower die on the worktable 004 of the bending machine. After the top and lower dies are aligned, the operator sets the bending parameters in the existing CNC system of the bending machine. The sheet metal to be processed is placed on the front support frame of the bending machine, and the back gauge device of the bending machine is used for precise positioning to ensure the accuracy of the bending position. After the bending machine is started, the pressure block 003, driven by the hydraulic system, moves the top die downward. The top die presses down at a preset pressure and speed. When the top die contacts the thin-walled steel plate, the thin-walled steel plate is squeezed by the top and lower dies and deforms along the top and lower dies. After bending is completed, the top die automatically returns to its original position. The sheet metal is flipped over and the above steps are repeated to remove the S-shaped bent plate. Compared with the original method, mechanized processing can effectively reduce the deviation of the external dimensions to ensure product quality and precision. After modifying the existing CNC bending machine in the workshop, the adoption of mechanized processing can significantly improve production efficiency.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A mold assembly for a bending device, characterized in that: It includes a top mold and a bottom mold. The top mold has an arc-shaped cross-section pressing surface, which faces the bottom mold during use. The bottom mold has an angled shaping surface I and a shaping surface II, which face the top mold during use. In use, the pressing surface is located between the shaping surface I and the shaping surface II, and the top mold and / or bottom mold is driven to bring the pressing surface closer to or further away from the shaping surface I and the shaping surface II.

2. The mold assembly for bending equipment according to claim 1, characterized in that: On the cross section, the shaping surface I and shaping surface II are respectively tangent to the pressure arc surface.

3. The mold assembly for bending equipment according to claim 1, characterized in that: The shaping surface I and shaping surface II form a 60° angle, and the sharp angle of the angle between shaping surface I and shaping surface II is away from the pressure arc surface.

4. The mold assembly for bending equipment according to claim 1, characterized in that: The top mold includes a fixed bracket and an arc-pressing component. The fixed bracket is disposed on the arc-pressing component, and the arc-pressing surface is located on the arc-pressing component. The fixed bracket has a connecting end for setting at a preset position.

5. The die assembly for a bending device according to claim 4, characterized in that: The arc-pressing component is elongated, and the fixing bracket consists of several components disposed on the arc-pressing component.

6. The mold assembly for bending equipment according to claim 4, characterized in that: The top mold includes a connector for setting the fixing bracket at a preset position; the fixing bracket includes a left fixing plate and a right fixing plate disposed opposite to each other on the lateral sides of the arc pressing component; The connector passes through the left and right fixing plates to fix the bracket in a preset position.

7. The die assembly for a bending device according to claim 6, characterized in that: The left fixing plate has a left wing plate, the right fixing plate has a right wing plate, and the fixing bracket further includes a top plate that spans the arc pressing member and is detachably connected to the left and right wing plates. A limiting groove that is closed in cross section is formed between the top plate, the left fixing plate, the right fixing plate and the arc pressing component.

8. The mold assembly for bending equipment according to claim 1, characterized in that: The bottom mold includes an H-beam and shaping plates I and II disposed in a recess on the upper part of the H-beam. Shaping plates I and II are at an angle, and the side of shaping plate I facing shaping plate II is shaping surface I, and the side of shaping plate II facing shaping plate I is shaping surface II.

9. The die assembly for a bending device according to claim 8, characterized in that: The bottom formwork also includes a bottom plate, a left support plate, and a right support plate. The bottom plate is located at the bottom of the H-beam, and the left and right support plates are located on the two sides of the H-beam respectively, and each of them connects the H-beam and the bottom plate.

10. The mold assembly for a bending device according to claim 8, characterized in that: The upper edge of the shaping plate I is connected to the left top edge of the H-beam, and the upper edge of the shaping plate II is connected to the right top edge of the H-beam; the lower edge of the shaping plate I and the lower edge of the shaping plate II are connected to the web of the H-beam at intervals.

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