Bending die and bending equipment for plate

Abstract

The bending die comprises a top die body and a bottom die body, the top die body is provided with an arc pressing face with the arc-shaped cross section, and the arc pressing face faces the bottom die body when the bending die is used; the bottom mold is provided with a shaping surface I and a shaping surface II which form an angle, and the shaping surface I and the shaping surface II face the top mold during use; during use, the arc pressing surface is located between the shaping surface I and the shaping surface II, and the top die and / or the bottom die are / is driven to enable the arc pressing surface to be close to or away from the shaping surface I and the shaping surface II. The quality of the bent plate can be improved, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of plate bending processing, and in particular to a bending die and bending equipment for plates. Background Art

[0002] With the rapid development of the economy and the acceleration of urbanization, the amount of urban domestic waste has increased dramatically, and more and more domestic waste needs to be processed. Incinerators are widely used in China due to their unique advantages. Expansion joints are one of the important components of incinerators. To produce expansion joints, thin-walled steel plates must be cut into sheets of corresponding widths and then bent according to the drawing requirements.

[0003] Since the existing bending machine in the workshop can only bend the steel plate to 90°, and the bending angle of the expansion joint is 60°, the existing operation 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 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 placed on the working 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, the thin-walled steel plate is turned 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] The existing method requires separate heating, bending and cooling steps, which takes a long time to produce and is inefficient. After the steel plate is heated, it is easy to cause the steel plate to deform, and the mechanical properties and shape are changed, which affects the quality of the bent plate. It is difficult to ensure the accuracy of the finished product's external dimensions, and the performance and external dimensions of the produced expansion joint are difficult to control.

[0005] In order to solve the above problems, a bending mold and bending equipment for plates are needed to improve the quality of bent plates and increase production efficiency. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to overcome the defects in the prior art and provide a bending mold and bending equipment for plates, which can improve the quality of expansion joints and improve production efficiency.

[0007] The bending die for sheet materials of the present invention comprises a top die and a bottom die, wherein the top die has a curved pressing surface with an arc-shaped cross section, and when in use, the curved pressing surface faces the bottom die;

[0008] The bottom mold has an angled shaping surface I and a shaping surface II, and when in use, the shaping surface I and the shaping surface II face the top mold;

[0009] When in use, the arc pressing surface is located between the shaping surface I and the shaping surface II, and the top mold and / or the bottom mold are driven to make the arc pressing surface approach or move away from the shaping surface I and the shaping surface II.

[0010] Furthermore, in the cross section, the shaping surface I and the shaping surface II are respectively tangent to the arc pressing surface.

[0011] Furthermore, the shaping surface I and the shaping surface II form an angle of 60°, and the sharp corner of the angle formed by the shaping surface I and the shaping surface II is away from the arc-pressing surface.

[0012] Furthermore, the top mold includes a fixed bracket and an arc pressing piece, the fixed bracket is arranged on the arc pressing piece, the arc pressing surface is located on the arc pressing piece, and the fixed bracket has a connecting end for being set at a preset position.

[0013] Furthermore, the arc pressing piece is in the shape of an elongated strip, and the fixing brackets are a plurality of brackets arranged on the arc pressing piece.

[0014] Furthermore, the top mold includes a connecting piece for setting the fixing bracket at a preset position; the fixing bracket includes a left fixing plate and a right fixing plate which are relatively arranged on both sides of the arc pressing member;

[0015] The connecting piece is passed through the left fixing plate and the right fixing plate to set the fixing bracket at 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 further includes a top plate that spans the arc-pressing member and is detachably connected to the left wing plate and the right wing plate;

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

[0018] Furthermore, the bottom mold includes an H-shaped steel and a shaping plate I and a shaping plate II arranged in the upper recess of the H-shaped steel. The shaping plate I and the shaping plate II are at an angle, and the side of the shaping plate I facing the shaping plate II is the shaping surface I, and the side of the shaping plate II facing the shaping plate I is the 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 arranged at the bottom of the H-shaped steel, and the left support plate and the right support plate are correspondingly arranged on both sides of the H-shaped steel, and respectively connect the H-shaped steel and the bottom plate.

[0020] The present solution also discloses a bending device for plates, comprising the bending die and a bending machine, wherein the bending machine has a pressing block driven to move up and down and a workbench located at the bottom of the pressing block; the top die of the bending die is arranged on the pressing block, and the bottom die of the bending die is arranged on the workbench.

[0021] The beneficial effects of the present invention are as follows: the present invention discloses a bending die and bending equipment for plates, which directly utilizes workshop materials to manufacture the bending die, and respectively installs the manufactured top die and bottom die to corresponding positions of the bending machine to perform stamping production to manufacture the expansion joint. Due to the use of the die and the absence of heating the steel plate, the performance and external dimensions of the produced bent plate can meet the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0023] Figure 1 It is a structural schematic diagram of the bending machine of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the bending die of the present invention being arranged on the pressing block and the workbench of the bending machine;

[0025] Figure 3 For the present invention Figure 2 Schematic diagram of the main structure;

[0026] Figure 4 For the present invention Figure 2 A side structural diagram of

[0027] Figure 5 Schematic diagram of the structure of the bending mold of the present invention;

[0028] Figure 6 For the present invention Figure 5 Schematic diagram of the main structure;

[0029] Figure 7 For the present invention Figure 5 Schematic diagram of the side structure. DETAILED DESCRIPTION

[0030] Figure 1 This is a schematic diagram of the structure of the present invention. As shown in the figure, the bending die for sheet metal in this embodiment includes a top die 001 and a bottom die 002. The top die 001 has a curved surface with an arc-shaped cross section. The arc shape can include any curved line segment on a circle or ellipse; or a continuous curved curve formed by connecting a series of points; or a combination of several arc segments, etc., which will not be repeated here. When in use, the curved surface faces the bottom die 002. The curved surface is used to form a predetermined curvature of the steel sheet to form a corresponding shape.

[0031] The top mold 001 includes a fixed bracket and an arc pressing piece. The fixed bracket is set on the arc pressing piece, and the arc pressing surface is located on the arc pressing piece. The fixed bracket has a connecting end for being set 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 repeated here.

[0033] The arc pressing piece is in the shape of an elongated strip, and includes a main pressure head 91 in the shape of a rod and a connecting head 2 in the shape of a rectangular strip. The main pressure head 91 is arranged at the bottom of the connecting head 2, and the two maintain a parallel relationship. The arc pressing surface is the lower half of the semicircular arc-shaped outer surface of the main pressure head 91. By adjusting the diameter or angle of the main pressure head 91 in the arc pressing piece, the curvature of the arc pressing surface corresponds to the curvature of the bending position of the different plates that need to be bent. It should be understood that the main pressure head can be designed as a detachable structure or a fixed structure. This solution is a main pressure head with a fixed diameter size, which is suitable for batch production and continuous bending of plates.

[0034] In this embodiment, the fixing bracket includes a left fixing plate 3 and a right fixing plate 4 disposed on opposite lateral sides of the arc pressure member. 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 on top of the main pressure head 91. The top end of the left fixing plate 3 is bent and extended to the left to form the left wing plate 5, and the top end of the right fixing plate 4 is bent and extended to the right to form the right wing plate 6. The arc pressure member is a steel component, and the left fixing plate 3 and the right fixing plate 4 are "L"-shaped steel plates welded to the arc pressure member.

[0035] In this embodiment, the fixed bracket also includes a top plate 7 that spans the arc pressure piece 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 serves the purpose of quick disassembly and assembly, and has flexibility and better fastening, so that the structural strength of the upper mold is higher and suitable for continuous operation.

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

[0037] Specifically, the connecting member includes bolts that pass through the left fixing plate 3 and the right fixing plate 4 in the transverse direction.

[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 arranged 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] When in use, the limit slot 8 is inserted upward into the pressure plate 11, so that the left fixing plate 3 and the right fixing plate 4 form a clamp on the pressure plate 11, and the bottom of the pressure plate 11 is against the top of the connector 2. The top die is fixed to the pressure head 9 of the bending machine using bolts passing through the left fixing plate 3 and the right fixing plate 4. 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 through the remaining bolts. The structural strength is higher and the use is more stable.

[0040] When the bending machine drives the pressing block 003, the top die is driven at the same time, and the up and down movement of the top die and the adjustment of the speed and pressure are achieved through the existing technology.

[0041] In this embodiment, the fixing brackets are several and evenly distributed on the arc pressing member. The top plate 7 in each fixing bracket has a corresponding installation gap, and the arc pressing member is set at the bottom of the bending machine pressure block 003 along the length of the pressure plate 11. This arrangement is used to more securely fix the top die to the bending machine when bending long thin-walled steel plates, and at the same time, more uniform force is applied to ensure the bending quality of thin-walled steel plates.

[0042] In this embodiment, the bottom die 002 is arranged on the workbench 004 of the bending machine when in use, and the bottom die 002 is opposite to the top die 001; the bottom die 002 has an angled shaping surface I and shaping surface II, and the shaping surface I and shaping surface II are facing the top die 001 when in use; in the cross section, the shaping surface I and shaping surface II are respectively tangent to the arc pressure surface, and the tangency refers to the tangency between the top die and the bottom die after the die is closed, and the shaping surface I and shaping surface II smoothly transition through the arc pressure surface to ensure that the bent sheet forms a predetermined bending shape along the arc pressure surface and the shaping surface I and shaping surface II. The bending angle is the angle between the shaping surface I and the shaping surface II, which is 60° in this scheme.

[0043] In this embodiment, the bottom mold 002 includes an H-shaped steel 12 and a shaping plate I 16 and a shaping plate II 17 arranged in a partial recess on the H-shaped steel 12. The shaping plate I 16 and the shaping plate 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 the shaping surface II are at an angle of 60°, and the sharp corner of the angle between the shaping surface I and the shaping surface II is downward and away from the arc pressure surface.

[0044] Specifically, the upper end edge of the shaping plate I 16 is connected to the left top edge of the H-shaped steel 12, and the lower end edge is connected to the web of the H-shaped steel 12 and approaches the middle of the web. The upper end edge of the shaping plate II 17 is connected to the right top edge of the H-shaped steel 12, and the lower end edge is connected to the web of the H-shaped steel 12 and approaches the middle of the web. There is a gap between the lower end edge of the shaping plate I 16 and the lower end edge 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 also includes a bottom plate 13, a left support plate 14 and a right support plate 15. The bottom plate 13 is arranged at the bottom of the H-shaped steel 12, and the left support plate 14 and the right support plate 15 are correspondingly arranged on both sides of the H-shaped steel 12, and respectively connect the H-shaped steel 12 and the bottom plate 13.

[0046] Specifically, the bottom of the H-shaped steel 12 is set on the bottom plate 13, the left support plate 14 connects the left end edge of the bottom plate 13 and the left top edge of the H-shaped steel 12, and the left support plate 14 and the shaping plate I 16 are opposite to each other at the left top edge of the H-shaped steel 12, so that the structural strength is guaranteed. The right support plate 15 connects the right end edge of the bottom plate 13 and the right top edge of the H-shaped steel 12, and the right support plate 15 and the shaping plate II 17 are opposite to each other at the right top edge of the H-shaped steel 12, so that the structural strength is guaranteed. The left support plate 14 and the right support plate 15 form a 60° angle, forming a multi-triangular format bearing structure, and the sharp corner of the angle formed by the left support plate 14 and the right support plate 15 faces upward and close to the arc pressing surface. This setting method can support a certain weight when the lower mold is loaded, so as to ensure that the bending angle is not easily deformed and improve the 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 steel plates, which are welded on the H-shaped steel 12. The materials for manufacturing the top mold and the lower mold of this solution are easy to obtain, the mold manufacturing is simple, the production cost is low, and it can improve production efficiency and have better economic benefits.

[0048] During use, the arc-pressing surface is located between the shaping surface I and the shaping surface II, and the top die 001 and / or the bottom die 002 are driven to move the arc-pressing surface closer to or farther from the shaping surface I and the shaping surface II. The "and / or" means that the top die 001 or the bottom die 002 are driven individually to move closer to or farther from the corresponding side, or they can be driven simultaneously to move closer to or farther from each other. In this solution, the bottom die 002 is placed on the workbench 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 to each other, and the top die 001 is driven closer to or farther from the bottom die 002 along with the pressure block 003.

[0049] This proposal also discloses a bending device for sheet metal, comprising the aforementioned bending die and a bending machine. The bending machine comprises a pressure block 003 that is driven to move up and down, and a workbench 004 located at the bottom of the pressure block 003. The top die 001 of the bending die is mounted on the pressure block 003, and the bottom die 002 of the bending die is mounted on the workbench 004. To meet the requirements, this proposal directly utilizes workshop materials to manufacture the bending die. The manufactured top die 001 and bottom die 002 are respectively installed in corresponding positions on the bending machine, and the expansion joint is produced by stamping. Because the die is used and there is no need to heat the steel plate, the performance and external dimensions of the produced bent plate meet the requirements.

[0050] Specifically, during operation, the operator installs the top die on the pressure block 003 of the bending machine, and the lower die is placed on the workbench 004 of the bending machine. After the top die and the lower die are adjusted and aligned, the operator sets the bending parameters in the existing CNC system of the bending machine, places the sheet to be processed on the front support rack of the bending machine, and accurately positions it through the rear stop device of the bending machine to ensure the accuracy of the bending position. After the bending machine is started, the pressure block 003 is driven by the hydraulic system to drive the top die to move 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 die and the lower die, and deformed along the top die and the lower die. After the bending is completed, the top die automatically returns to its position, and the sheet is turned over and the above steps are repeated again to take out 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 the existing CNC bending machine in the workshop is modified, the use of mechanized processing can greatly improve production efficiency.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A bending die for a sheet material, characterized in that: It includes a top mold and a bottom mold, wherein the top mold has a curved pressing surface with an arc-shaped cross section, and when in use, the curved pressing surface faces the bottom mold; The bottom mold has an angled shaping surface I and a shaping surface II, and when in use, the shaping surface I and the shaping surface II face the top mold; When in use, the arc pressing surface is located between the shaping surface I and the shaping surface II, and the top mold and / or the bottom mold are driven to make the arc pressing surface approach or move away from the shaping surface I and the shaping surface II.

2. The bending die for sheet materials according to claim 1, characterized in that: In the cross section, the shaping surface I and the shaping surface II are respectively tangent to the arc pressing surface.

3. The bending die for sheet materials according to claim 1, characterized in that: The shaping surface I and the shaping surface II form an included angle of 60°, and the sharp corner of the included angle formed by the shaping surface I and the shaping surface II is away from the arc-pressing surface.

4. The bending die for sheet materials according to claim 1, characterized in that: The top mold includes a fixed bracket and an arc pressing piece. The fixed bracket is arranged on the arc pressing piece, and the arc pressing surface is located on the arc pressing piece. The fixed bracket has a connecting end for being arranged at a preset position.

5. The bending die for sheet materials according to claim 4, characterized in that: The arc pressing piece is in the shape of an elongated strip, and the fixing brackets are a plurality of brackets arranged on the arc pressing piece.

6. The bending die for sheet materials according to claim 4, characterized in that: The top mold includes a connecting piece for setting the fixed bracket at a preset position; the fixed bracket includes a left fixed plate and a right fixed plate arranged on both sides of the arc pressing member; The connecting piece is passed through the left fixing plate and the right fixing plate to set the fixing bracket at a preset position.

7. The bending die for sheet materials 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 wing plate and the right wing plate; A limiting groove closed in cross section is formed between the top plate, the left fixing plate, the right fixing plate and the arc pressing piece.

8. The bending die for sheet materials according to claim 1, characterized in that: The bottom mold includes an H-shaped steel and a shaping plate I and a shaping plate II arranged in the notch on the upper part of the H-shaped steel. The shaping plate I and the shaping plate II are at an angle, and the side of the shaping plate I facing the shaping plate II is the shaping surface I, and the side of the shaping plate II facing the shaping plate I is the shaping surface II.

9. The bending die for sheet materials according to claim 8, characterized in that: The bottom mold also includes a bottom plate, a left support plate and a right support plate. The bottom plate is arranged at the bottom of the H-shaped steel, and the left support plate and the right support plate are correspondingly arranged on both sides of the H-shaped steel, and respectively connect the H-shaped steel and the bottom plate.

10. A bending device for a plate, characterized in that: It includes the bending mold according to any one of claims 1 to 9, and also includes a bending machine, which has a pressure block driven to move up and down and a workbench located at the bottom of the pressure block; the top mold of the bending mold is arranged on the pressure block, and the bottom mold of the bending mold is arranged on the workbench.

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