Bending device

Abstract

The utility model relates to the field of machining equipment, and provides a bending device which is used for bending a workpiece comprising a first layer and a second layer which are composed of different metals and are arranged in a stacked mode. The bending mechanism comprises a bending assembly and a forming blocking piece, the forming blocking piece is provided with an inclined face, and the inclined face is gradually away from the first layer in the direction away from the bending assembly; the pressing and holding mechanism comprises a pressing and holding assembly arranged opposite to the bearing part, the pressing and holding assembly comprises a pressing and holding part, the end face of the pressing and holding part is provided with a pressing and holding protrusion corresponding to the to-be-bent position of the workpiece, the pressing and holding protrusion is used for extruding the first layer so that the first layer can deform, and the inclined face of the forming blocking part is used for avoiding the first layer so that the first layer can extend in the third direction; and the position of the neutral layer of the first layer at the to-be-bent part is kept consistent with the positions of other neutral layers of the first layer. The bending device can be used for bending the workpiece, so that the outer side of the workpiece can be prevented from cracking while the inner side of the workpiece is deformed.

Description

Technical Field

[0001] This application relates to the field of processing equipment technology, specifically to a bending device. Background Technology

[0002] In the bending process of strip metal materials, the middle part of the strip metal material is usually stabilized first, and then force is applied to both ends of the strip metal material to bend it according to a predetermined angle and shape. In this process, the surface area of ​​the inner side of the strip metal material remains unchanged, the neutral layer moves inward, and the outer side deforms due to the stretching. If the stretching exceeds the elastic limit of the strip metal material, the outer surface may crack due to overstretching, and in severe cases, it may even lead to the cracking of the strip metal material. Utility Model Content

[0003] In view of the above, it is necessary to propose a bending device that can bend composite material workpieces, so that the inner side of the workpiece is deformed while effectively preventing the outer side of the workpiece from cracking.

[0004] This application provides a bending device for bending a workpiece, the workpiece comprising a first layer and a second layer respectively composed of different metals and stacked on top of each other, comprising: a bearing mechanism including a bearing member movably disposed along a first direction, the bearing member being used to bear the workpiece; a bending mechanism including a bending assembly disposed along a second direction near the bearing member and a forming stop connected to the bending assembly, the bending assembly being used to abut against the lower end of the workpiece, the forming stop being used to abut against the side of the workpiece along a third direction, the forming stop having an inclined surface on the side facing the workpiece opposite to the first layer, the inclined surface gradually moving away from the first layer along a direction away from the bending assembly, wherein the first direction, the second direction, and the third direction are mutually perpendicular; and a pressing... The holding mechanism includes a pressing assembly disposed opposite to the carrier member along the first direction. The pressing assembly includes a pressing member disposed corresponding to the bending assembly. The end face of the pressing member is provided with a pressing protrusion corresponding to the workpiece to be bent. The pressing member is used to press the workpiece located on the carrier member to cooperate with the bending assembly to bend the end of the workpiece. The pressing protrusion is used to squeeze the first layer to deform the first layer at the bending point of the workpiece. The inclined surface of the forming stop is used to avoid the first layer at the bending point of the workpiece, so that the first layer at the bending point of the workpiece extends along the third direction, thereby making the position of the neutral layer of the first layer at the bending point of the workpiece consistent with the position of the neutral layer of other parts of the first layer.

[0005] The aforementioned bending device uses a pressing member in the pressing mechanism to press the middle of the workpiece carried by the carrier member in the carrier mechanism and press the workpiece downwards. The bending assembly of the bending mechanism abuts against the end of the workpiece. During the downward movement of the workpiece by the pressing member, the bending assembly bends the end of the workpiece. During bending, the pressing protrusion of the pressing member squeezes the first layer of the workpiece against the bending assembly, causing the first layer to stretch and deform towards the forming stop of the bending mechanism. This ensures that the neutral layer of the first layer at the point to be bent is aligned with the neutral layer of the other parts of the first layer, thereby reducing the stretching of the workpiece's outer surface during bending and effectively preventing cracking of the workpiece's outer surface.

[0006] In some embodiments, the bearing mechanism further includes a lower die, the lower die having a receiving groove extending along the first direction, the receiving groove being used to receive the bending mechanism, and the bearing member being movably disposed in the receiving groove along the first direction; the pressing mechanism further includes an upper die disposed opposite to the lower die, the pressing member being connected to the upper die, the upper die being used to drive the pressing member to press the workpiece when the die is closed.

[0007] In some embodiments, the bending assembly includes: a rack, fixedly connected to the sidewall of the receiving groove and disposed opposite to the carrier in the second direction; an engaging member, movably disposed in the receiving groove, the engaging member having an arc-shaped tooth surface on the side facing the rack, the arc-shaped tooth surface engaging with the rack; and a bending member, including a connecting portion connected to the engaging member and a bending portion connected to the connecting portion and disposed opposite to the end of the workpiece, the forming stop being connected to the connecting portion on the side away from the engaging member; wherein, when the holding member pushes against the workpiece and drives the bending portion to move downward, the engaging member is used to be pushed downward by the bending portion, and rotates around the third direction under the guidance of the rack and drives the bending portion to rotate to cooperate with the holding member to bend the workpiece.

[0008] In some embodiments, the forming stop is further provided with a clamping surface connected to the inclined surface on the side facing the workpiece. The clamping surface is located close to the bending member and opposite to the second layer of the workpiece. The plane where the clamping surface is located is perpendicular to the third direction and is used to abut against the second layer to clamp the second layer.

[0009] In some embodiments, the angle between the plane containing the inclined plane and the second direction ranges from 7.5° to 12.5°.

[0010] In some embodiments, the support mechanism further includes a reset assembly, the reset assembly including a first elastic member disposed on the side of the support member away from the pressure member, the first elastic member being used to push the support member to move along the first direction to reset the support member.

[0011] In some embodiments, the reset assembly further includes: a reset plate, movably disposed in the receiving groove along the first direction and disposed at the end of the first elastic member away from the carrier member; a second elastic member, disposed on the side of the reset plate opposite to the first elastic member; and a push plate, disposed on the side of the reset plate opposite to the second elastic member and disposed opposite to the engaging member; wherein the second elastic member is used to push the reset plate to move along the first direction, so that the reset plate pushes the first elastic member to move along the first direction, and to drive the reset plate to push the push plate to reset the engaging member.

[0012] In some embodiments, the pressing assembly further includes a connector connected to the upper mold. The connector has a trapezoidal portion, with the upper base of the trapezoidal portion facing the support member and the lower base of the trapezoidal portion away from the support member. The pressing member is slidably connected to the waist of the trapezoidal portion. When the upper mold moves the connector away from the workpiece, the pressing member slides along the waist of the trapezoidal portion, thereby causing the pressing member to move away from the bending point of the workpiece in the second direction.

[0013] In some embodiments, the trapezoidal portion has a limiting groove, and the holding member is provided with a limiting protrusion adapted to the limiting groove. The limiting protrusion is slidably disposed in the limiting groove. When the holding member slides along the waist of the trapezoidal portion, the limiting protrusion can abut against the side wall of the limiting groove along the first direction to limit the holding member.

[0014] In some embodiments, the holding member has a forming portion at one end facing the carrier member, the forming portion being disposed on the side of the holding member away from the connector, the forming portion being used to hold the workpiece when the bending assembly pushes against the end of the workpiece, and the holding protrusion being disposed on the side of the forming portion away from the connector. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the bending device provided in an embodiment of this application.

[0016] Figure 2 for Figure 1 The bending device shown is a cross-sectional view along the II-II direction.

[0017] Figure 3 This is a schematic diagram of the structure of a workpiece bent by the bending device provided in an embodiment of this application.

[0018] Figure 4 for Figure 1 The diagram shows the structural schematics of the bending mechanism and the pressing mechanism of the bending device.

[0019] Figure 5 for Figure 4 The diagram shows the exploded structure of the bending mechanism and the pressing mechanism.

[0020] Figure 6 for Figure 4 The bending mechanism and the pressing mechanism shown are sectional views along the VI-VI direction.

[0021] Figure 7 This is a schematic diagram of the structure of the bending device provided in this application when the pressure holder compresses the workpiece.

[0022] Key component symbols: Bending device 100, bearing mechanism 10, bearing component 11, lower die 12, receiving groove 121, reset assembly 13, first elastic component 131, reset plate 132, second elastic component 133, push plate 134, bending mechanism 20, bending assembly 21, rack 211, meshing component 212, arc-shaped tooth surface 2121, bending component 213, connecting part 2131, bending part 2132, forming stop 22, inclined surface 22 1. Clamping surface 222, pressing mechanism 30, pressing assembly 31, pressing part 311, pressing protrusion 3111, limiting protrusion 3112, forming part 3113, connecting part 312, trapezoidal part 3121, limiting groove 3122, upper mold 32, workpiece 200, first layer 201, second layer 202, neutral layer 2011, 2021, middle part 203, bending part 204, end 205, outer side 206, inner side 207. Detailed Implementation

[0023] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0024] In the description of this application, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, it should be noted that "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection that allows communication between the two components; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] The embodiments of this application will be further described below with reference to the accompanying drawings. To facilitate understanding and explanation of the embodiments of this application, a three-dimensional coordinate system is established in some of the drawings, with the X-axis direction being the second direction, the Y-axis direction being the third direction, and the Z-axis direction being the first direction. The X-axis, Y-axis, and Z-axis directions are perpendicular to each other.

[0027] See Figure 1 , Figure 2 and Figure 3 This application provides a bending device 100 for bending a workpiece 200. The workpiece 200 includes a first layer 201 and a second layer 202. The workpiece 200 can be a strip structure and is a composite material. The first layer 201 and the second layer 202 can both be made of different metal materials, such as aluminum alloy and titanium alloy. In this embodiment, the workpiece 200 is a composite material made of aluminum alloy and titanium alloy. The first layer 201 is made of aluminum alloy and the second layer 202 is made of titanium alloy. After bending, the first layer 201 of aluminum alloy is located on the inner side, and the second layer 202 of titanium alloy is located on the outer side. Obviously, this is not a limitation of the embodiment of this application. The bent workpiece 200 includes a middle part 203, a bending part 204, an end 205, an outer side 206, and an inner side 207. The first layer 201 also includes a neutral layer 2011, and the second layer 202 also includes a neutral layer 2021. The bending device 100 includes a bearing mechanism 10, a bending mechanism 20, and a pressing mechanism 30.

[0028] Specifically, please see Figure 3 , Figure 4 and Figure 5 The supporting mechanism 10 includes a supporting member 11 movably disposed along the Z-axis direction, which is used to support the workpiece 200. The supporting member 11 can be a plate-like structure. It is understood that in this embodiment, the length of the supporting member 11 along the X-axis direction is less than the length of the workpiece 200, so as to expose the end 205 of the workpiece 200 when supporting the workpiece 200.

[0029] The bending mechanism 20 includes a bending assembly 21 disposed near the support member 11 along the X-axis direction and a forming stop 22 connected to the bending assembly 21. The bending assembly 21 abuts against the lower side of the end 205 of the workpiece 200, and the forming stop 22 abuts against the side of the workpiece 200 along the Y-axis direction. The forming stop 22 has an inclined surface 221 on the side facing the workpiece 200 that is opposite to the first layer 201. The inclined surface 221 gradually moves away from the first layer 201 in a direction away from the bending assembly 21. The forming stop 22 can be a block structure. When the bending assembly 21 bends the end 205 of the workpiece 200, the forming stop 22 can abut against the side of the first layer 201 along the Y-axis direction. In this embodiment, two forming stops 22 can be provided, and the two forming stops 22 are symmetrically arranged, respectively opposite to the two sides of the workpiece 200 in the Y-axis direction.

[0030] The holding mechanism 30 includes a holding assembly 31 disposed opposite to the carrier 11 along the Z-axis direction. The holding assembly 31 includes a holding member 311 disposed corresponding to the bending assembly 21. The holding member 311 is provided with a holding protrusion 3111 facing the workpiece 200. The holding member 311 is used to hold the workpiece 200 located on the carrier 11 to cooperate with the bending assembly 21 to bend the end 205 of the workpiece 200. The holding protrusion 3111 is used to squeeze the first layer 201 to make the workpiece... The first layer 201 of the workpiece 200 at the bending point 204 deforms. The inclined surface 221 of the forming stop 22 is used to avoid the first layer 201 of the workpiece 200 at the bending point 204, so that the first layer 201 of the workpiece 200 at the bending point 204 extends along the Y-axis direction, thereby making the position of the neutral layer 2011 of the first layer 201 of the workpiece 200 at the bending point 204 consistent with the position of the neutral layer 2011 of the other parts of the first layer 201. It can be understood that when bending the workpiece 200, the holding protrusion 3111 abuts against the inner surface 207 of the workpiece 200.

[0031] Please see also Figure 6It can be understood that if both ends 205 of the workpiece 200 need to be bent, then two sets of bending mechanisms 20 and two sets of holding members 311 are provided. The two sets of bending mechanisms 20 are symmetrically arranged and correspond one-to-one with the two ends 205 of the workpiece 200, and the two holding members 311 are symmetrically arranged and correspond one-to-one with the two bending mechanisms 20. In this way, when the holding members 311 hold the workpiece 200, the two bending components 21 can cooperate with the corresponding holding members 311 to bend the two ends 205 of the workpiece 200.

[0032] The bending device 100 provided in this application embodiment can press the middle part 203 of the workpiece 200 carried by the support member 11 in the support mechanism 10 through the pressing member 311 in the pressing mechanism 30, and press the workpiece 200 to move downward. The bending component 21 of the bending mechanism 20 can abut against the end 205 of the workpiece 200. During the process of the pressing member 311 pressing the workpiece 200 to move downward, the bending component 21 can bend the end 205 of the workpiece 200. During bending, the pressing protrusions 3111 of the pressing member 311 press the first layer 201 of the workpiece 200 against the bending assembly 21, thereby causing the first layer 201 of the workpiece 200 to extend and deform towards the forming stop 22 of the bending mechanism 20 under the pressure, so that the position of the neutral layer 2011 of the first layer 201 at the bending part 204 of the workpiece 200 is consistent with the position of the neutral layer 2011 of the other parts of the first layer 201, thereby reducing the stretching of the outer surface 206 of the workpiece 200 during the bending process, which can effectively prevent the outer surface 206 of the workpiece 200 from cracking.

[0033] It is understandable that in traditional bending methods, the length of the inner surface 207 of the workpiece 200 remains unchanged after bending. The material at the bending point 204 is stretched, and the outer surface 206 has the greatest stretch. At this time, the neutral layer 2011 of the first layer 201 and the neutral layer 2021 of the second layer 202 of the workpiece 200 will move towards the inner surface 207. When the stretch of the outer surface 206 exceeds the elastic limit of the workpiece 200's own material, cracks will appear due to overstretching, and in severe cases, it may even lead to the cracking of the workpiece 200. When bending the workpiece 200, the bending device 100 provided in this embodiment of the application is used, please refer to... Figure 7The pressing protrusions 3111 on the pressing member 311 can squeeze the inner side 207 of the workpiece 200 during the bending process, thereby ensuring that the neutral layer 2011 of the first layer 201 of the workpiece 200 maintains the same relative position as the neutral layer 2011 at other positions of the first layer 201 during the bending process. This reduces the stretching of the outer side 206, thus preventing cracks and splits from appearing on the outer side 206. At the same time, the forming stop 22 is provided with a slope 221, which can leave extension space for the first layer 201 when the pressing protrusions 3111 squeeze the first layer 201 of the workpiece 200 at the bending point 204, so that the squeezed part of the first layer 201 can extend along the Y-axis direction, thereby preventing the first layer 201 from bulging outwards onto the outer side 206 after being squeezed. In this embodiment, if the workpiece 200 is made of a composite material of aluminum alloy and titanium alloy, the pressing protrusion 3111 compresses the aluminum alloy layer so that the relative position of the neutral layer 2011 of the aluminum alloy layer remains unchanged, thereby preventing the titanium alloy layer from cracking after bending.

[0034] In some embodiments, the support mechanism 10 further includes a lower mold 12, which has a receiving groove 121 extending along the Z-axis direction. The receiving groove 121 is used to receive the bending mechanism 20, and the support member 11 is movably disposed in the receiving groove 121 along the Z-axis direction.

[0035] The holding mechanism 30 also includes an upper mold 32 disposed opposite to the lower mold 12. A holding member 311 is connected to the upper mold 32, and the upper mold 32 is used to drive the holding member 311 to hold the workpiece 200 when the mold is closed. The upper mold 32 is connected to a driving device (not shown), such as a cylinder, so that the upper mold 32 can be driven to move towards the lower mold 12 for mold closing, or driven away from the lower mold 12 for mold opening.

[0036] In some embodiments, see Figure 3 , Figure 4 , Figure 5 and Figure 6 The bending assembly 21 includes a rack 211, a meshing member 212, and a bending member 213.

[0037] The rack 211 is fixedly connected to the side wall of the receiving groove 121 and is arranged opposite to the carrier 11 along the X-axis direction. It can be understood that the rack 211 is provided with teeth facing the carrier 11.

[0038] The meshing member 212 is movably disposed in the receiving groove 121. The side of the meshing member 212 facing the rack 211 has an arc-shaped toothed surface 2121, which meshes with the rack 211. It can be understood that the arc-shaped toothed surface 2121 has teeth adapted to the rack 211 to allow the meshing member 212 to mesh with the rack 211. The side of the meshing member 212 away from the rack 211 does not have teeth, in order to avoid interference with other structures during operation.

[0039] The bending member 213 includes a connecting portion 2131 connected to the engaging member 212 and a bending portion 2132 connected to the connecting portion 2131 and disposed opposite to the end 205 of the workpiece 200. A forming stop 22 is connected to the connecting portion 2131 on the side away from the engaging member 212. The bending member 213 can be an irregularly shaped structure. The connecting portion 2131 can be a sheet-like structure and is embedded in the engaging member 212 to improve the stability of the bending member 213 when it moves with the engaging member 212. The bending portion 2132 is generally a columnar structure to improve its own structural strength, thereby enabling it to bend the workpiece 200.

[0040] In this embodiment, each bending component 21 is provided with two engaging parts 212, and the bending component 213 is provided with two connecting parts 2131. The two connecting parts 2131 are respectively provided at both ends of the bending part 2132 and are respectively embedded in the two engaging parts 212, so as to improve the stability of the movement of the bending part 2132 and improve the bending quality.

[0041] When the holding member 311 pushes against the workpiece 200 and drives the bending part 2132 to move downward, the engaging member 212 is pushed downward by the bending part 2132, and rotates around the Y-axis under the guidance of the rack 211 and drives the bending part 2132 to rotate so as to bend the workpiece 200 with the cooperating holding member 311.

[0042] In some embodiments, see Figure 3 , Figure 5 and Figure 7 The forming stop 22, facing the workpiece 200, is also provided with a clamping surface 222 connected to the inclined surface 221. The clamping surface 222 is located close to the bending member 213 and opposite to the second layer 202 of the workpiece 200. The plane of the clamping surface 222 is perpendicular to the Y-axis direction and is used to abut against the second layer 202 to clamp it. In this way, the second layer 202 of the workpiece 200 can be prevented from deforming under the pressure of the pressing protrusion 3111, thereby preventing deformation of the outer surface 206 of the workpiece 200 and improving the integrity of the outer surface 206. In this embodiment, the workpiece 200 is made of a composite material of aluminum alloy and titanium alloy. The clamping surface 222 of the forming stop 22 can abut against the titanium alloy layer of the workpiece 200, preventing the titanium alloy layer from deforming along the Y-axis direction during bending.

[0043] In some embodiments, see Figure 3 , Figure 5 and Figure 7 The angle between the plane containing the inclined surface 221 and the X-axis ranges from 7.5° to 12.5°. The angle between the plane containing the inclined surface 221 and the X-axis can be 7.5°, 8.5°, 9.5°, 10°, 10.5°, 11.5°, or 12.5°, etc. Of course, the angle between the plane containing the inclined surface 221 and the X-axis can also be any angle between 7.5° and 12.5°, and is not limited here. When the angle between the plane containing the inclined surface 221 and the X-axis is less than 7.5°, the clearance space between the inclined surface 221 of the forming stop 22 and the first layer 201 is insufficient. This will cause the neutral layer 2011 of the first layer 201 to still move towards the inner surface 207 of the workpiece 200 during bending, resulting in cracking on the outer surface 206 of the workpiece 200. When the angle between the plane containing the inclined surface 221 and the X-axis is greater than 12.5°, the clearance space between the inclined surface 221 of the forming stop 22 and the first layer 201 is too large, which will cause the pressing protrusion 3111 to squeeze the first layer 201 excessively, causing the neutral layer 2011 of the first layer 201 to move towards the outer side 206 of the workpiece 200, thereby affecting the structural strength of the workpiece 200 after bending.

[0044] In some embodiments, see Figure 1 and Figure 2 The bearing mechanism 10 also includes a reset assembly 13. The reset assembly 13 includes a first elastic element 131 disposed on the side of the bearing member 11 away from the pressing member 311. The first elastic element 131 is used to push the bearing member 11 to move along the Z-axis direction to reset the bearing member 11. The first elastic element 131 can be a spring or the like. By providing the first elastic element 131, the bearing member 11 can be pushed upward to reset during mold opening, and the bearing member 11 can push the workpiece 200 upward, making it easier to remove the bent workpiece 200.

[0045] In some embodiments, see Figure 1 and Figure 2 The reset assembly 13 also includes a reset plate 132, a second elastic member 133, and a push plate 134.

[0046] The reset plate 132 is movably disposed in the receiving groove 121 along the Z-axis direction and is disposed at the end of the first elastic member 131 away from the bearing member 11. The reset plate 132 can be a plate-shaped structure, and the reset plate 132 can slide along the Z-axis direction in the receiving groove 121.

[0047] The second elastic element 133 is disposed on the side of the reset plate 132 away from the first elastic element 131. The second elastic element 133 can be a spring or the like, and is used to elastically push the reset plate 132 to move.

[0048] The push plate 134 is disposed on the side of the reset plate 132 away from the second elastic member 133 and is disposed opposite to the engaging member 212. The push plate 134 can be a rectangular structure. When there are two sets of bending assemblies 21, there can be two push plates 134, and the two push plates 134 are disposed opposite to the engaging members 212 in the two sets of bending assemblies 21 respectively.

[0049] The second elastic member 133 is used to push the reset plate 132 to move along the Z-axis direction, so that the reset plate 132 pushes the first elastic member 131 to move along the Z-axis direction, and drives the reset plate 132 to drive the push plate 134 to push the engagement member 212 to reset.

[0050] In some embodiments, see Figure 1 , Figure 4 and Figure 5 The pressing assembly 31 also includes a connector 312 connected to the upper mold 32. The connector 312 is provided with a trapezoidal portion 3121. The upper bottom of the trapezoidal portion 3121 is disposed towards the support member 11, and the lower bottom of the trapezoidal portion 3121 is disposed away from the support member 11. The pressing member 311 is slidably connected to the waist of the trapezoidal portion 3121. When the upper mold 32 drives the connector 312 away from the workpiece 200, the pressing member 311 slides along the waist of the trapezoidal portion 3121, thereby causing the pressing member 311 to move away from the bending point 204 of the workpiece 200 in the X-axis direction. The connecting member 312 is fixedly connected to the upper mold 32, and the holding member 311 is slidably connected to the trapezoidal portion 3121. When the upper mold 32 moves to the lower mold 12 to close the mold, the holding member 311 abuts against the workpiece 200, which can bend the workpiece 200. When the mold opens, the upper mold 32 drives the connecting member 312 to move along the Z-axis. At this time, the holding member 311 slides relative to the trapezoidal portion 3121 under the action of gravity, and then moves away from the bent end 205 of the workpiece 200 in the X-axis direction (see [link]). Figure 3 This facilitates the separation of the clamping component 311 from the workpiece 200.

[0051] In some embodiments, see Figure 4 , Figure 5 and Figure 6The trapezoidal portion 3121 has a limiting groove 3122, and the holding member 311 is provided with a limiting protrusion 3112 that matches the limiting groove 3122. The limiting protrusion 3112 is slidably disposed within the limiting groove 3122. When the holding member 311 slides along the waist of the trapezoidal portion 3121, the limiting protrusion 3112 can abut against the side wall of the limiting groove 3122 along the Z-axis to limit the holding member 311. Through the cooperation of the limiting protrusion 3112 and the limiting groove 3122, the sliding distance of the holding member 311 relative to the trapezoidal portion 3121 can be limited, preventing the holding member 311 from detaching from the trapezoidal portion 3121.

[0052] In some embodiments, see Figure 4 , Figure 5 and Figure 6 A forming portion 3113 is provided at one end of the holding member 311 facing the bearing member 11. The forming portion 3113 is located on the side of the holding member 311 away from the connecting member 312. The forming portion 3113 is used to hold the workpiece 200 when the bending assembly 21 pushes against the end 205 of the workpiece 200. A pressing protrusion 3111 is located on the side of the forming portion 3113 away from the connecting member 312. By providing the forming portion 3113, the bending portion 204 of the workpiece 200 can be a preset structure when bending the workpiece 200 to meet processing requirements. In this embodiment, the forming portion 3113 has an arc-shaped structure. The diameter of the arc-shaped forming portion 3113 can be 7.5 mm, and the thickness of the pressing protrusion 3111 can be 0.4 mm. It can be understood that the diameter of the arc-shaped forming portion 3113 and the thickness of the pressing protrusion 3111 can be set according to actual needs and are not limited here. In other embodiments, the molding part 3113 may also have other structures, such as an elliptical structure, a rounded corner structure, etc. The specific structure of the molding part 3113 can be set according to actual needs and is not limited here.

[0053] The working process of the bending device 100 provided in this embodiment is roughly as follows:

[0054] First, the workpiece 200 is placed on the support member 11. At this time, the middle part 203 of the workpiece 200 abuts against the support member 11, and the lower side of the end 205 of the workpiece 200 abuts against the bent part 2132 of the bending member 213. Then, the upper mold 32 drives the pressing assembly 31 to move towards the workpiece 200 to close the mold. When the mold is closed, the holding member 311 abuts against the middle part 203 of the workpiece 200 and continues to move downward under the drive of the upper mold 32. The holding member 311 pushes the middle part 203 of the workpiece 200 and the bearing member 11 downward. The end 205 of the workpiece 200 pushes the bent part 2132 of the bending member 213 downward. The bent part 2132 drives the connecting part 2131 of the bending member 213 to move. The connecting part 2131 drives the meshing member 212 to move. The meshing member 212 rotates around the Y-axis under the guidance of the rack 211, thereby driving the bending member 213 to rotate. The bent part 2132 pushes the end 205 of the workpiece 200 to bend towards the holding member 311 until the mold is closed. The bent part 2132 bends the end 205 of the workpiece 200.

[0055] During the bending process, the pressing protrusions 3111 of the pressing member 311 press the first layer 201 of the workpiece 200 so that the first layer 201 of the workpiece 200 to be bent 204 extends along the Y-axis direction, thereby making the relative position of the neutral layer 2011 of the first layer 201 of the workpiece 200 to be bent 204 consistent with the neutral layer 2011 of other parts of the first layer 201. This can prevent the workpiece 200 from breaking on the outer side 206 after bending.

[0056] After bending, the upper die 32 moves away from the lower die 12 to open the die. The upper die 32 drives the connecting piece 312 to move upward along the Z-axis. Under the action of gravity, the holding piece 311 slides relative to the trapezoidal portion 3121, and then moves away from the bent end 205 of the workpiece 200 in the X-axis direction, which facilitates the separation of the holding piece 311 from the workpiece 200. When the holding piece 311 moves upward along the Z-axis, the second elastic piece 133 pushes the reset plate 132 upward, the reset plate 132 pushes the first elastic piece 131 and the push plate 134 upward, the first elastic piece 131 pushes the bearing piece 11 upward, and the push plate 134 pushes the engaging piece 212 upward to rotate, thereby resetting the bearing piece 11, the engaging piece 212 and the bent piece 213. When the bearing piece 11 is reset, it lifts the workpiece 200 upward, which facilitates unloading.

[0057] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be embraced within this application.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application 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 application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A bending device for bending a workpiece, said workpiece comprising a first layer and a second layer respectively composed of different metals and stacked on top of each other, characterized in that, include: The support mechanism includes a support member movably disposed along a first direction, the support member being used to support the workpiece; A bending mechanism includes a bending assembly disposed along a second direction near the support member and a forming stop connected to the bending assembly. The bending assembly abuts against the lower end of the workpiece, and the forming stop abuts against the side of the workpiece along a third direction. The forming stop has an inclined surface on its side facing the workpiece, opposite to the first layer. The inclined surface gradually moves away from the first layer along a direction away from the bending assembly, wherein the first direction, the second direction, and the third direction are mutually perpendicular. The pressing mechanism includes a pressing assembly disposed opposite to the carrier member along the first direction. The pressing assembly includes a pressing member disposed corresponding to the bending assembly. The end face of the pressing member is provided with a pressing protrusion corresponding to the workpiece to be bent. The pressing member is used to press the workpiece located on the carrier member to cooperate with the bending assembly to bend the end of the workpiece. The pressing protrusion is used to squeeze the first layer to deform the first layer at the bending point of the workpiece. The inclined surface of the forming stop is used to avoid the first layer at the bending point of the workpiece, so that the first layer at the bending point of the workpiece extends along the third direction, thereby making the position of the neutral layer of the first layer at the bending point of the workpiece consistent with the position of the neutral layer of other parts of the first layer.

2. The bending device as described in claim 1, characterized in that, The supporting mechanism further includes a lower die, which has a receiving groove extending along the first direction. The receiving groove is used to receive the bending mechanism, and the supporting member is movably disposed in the receiving groove along the first direction. The pressing mechanism further includes an upper mold disposed opposite to the lower mold, the pressing member being connected to the upper mold, and the upper mold being used to drive the pressing member to press the workpiece when the mold is closed.

3. The bending device as described in claim 2, characterized in that, The bending assembly includes: A rack is fixedly connected to the side wall of the receiving groove and is disposed opposite to the bearing member along the second direction; A meshing element is movably disposed in the receiving groove, and the meshing element has an arc-shaped tooth surface on the side facing the rack, the arc-shaped tooth surface meshing with the rack; and A bending member includes a connecting portion connected to the engaging member and a bending portion connected to the connecting portion and disposed opposite to the end of the workpiece; the forming stop is connected to the side of the connecting portion away from the engaging member; wherein, When the holding member pushes against the workpiece and drives the bending part to move downward, the engaging member is pushed downward by the bending part and rotates around the third direction under the guidance of the rack, driving the bending part to rotate so as to cooperate with the holding member to bend the workpiece.

4. The bending device as described in claim 3, characterized in that, The forming stop is also provided with a clamping surface connected to the inclined surface on the side facing the workpiece. The clamping surface is located close to the bending member and opposite to the second layer of the workpiece. The plane where the clamping surface is located is perpendicular to the third direction and is used to abut against the second layer to clamp the second layer.

5. The bending device as described in claim 1, characterized in that, The angle between the plane containing the inclined plane and the second direction ranges from 7.5° to 12.5°.

6. The bending device as described in claim 3, characterized in that, The bearing mechanism further includes a reset assembly, which includes a first elastic member disposed on the side of the bearing member away from the pressing member. The first elastic member is used to push the bearing member to move along the first direction so that the bearing member is reset.

7. The bending device as described in claim 6, characterized in that, The reset component further includes: A reset plate is movably disposed in the receiving groove along the first direction and is disposed at the end of the first elastic member away from the bearing member; The second elastic element is disposed on the side of the reset plate opposite to the first elastic element; and A push plate is disposed on the side of the reset plate opposite to the second elastic member and is disposed opposite to the engaging member; wherein, The second elastic member is used to push the reset plate to move in the first direction, so that the reset plate pushes the first elastic member to move in the first direction, and so that the reset plate drives the pushing plate to push the engaging member to reset.

8. The bending device as described in claim 2, characterized in that, The pressing assembly further includes a connector connected to the upper mold. The connector has a trapezoidal portion, with the upper base of the trapezoidal portion facing the support member and the lower base of the trapezoidal portion away from the support member. The pressing member is slidably connected to the waist of the trapezoidal portion. When the upper mold moves the connector away from the workpiece, the pressing member slides along the waist of the trapezoidal portion, thereby causing the pressing member to move away from the bending point of the workpiece in the second direction.

9. The bending device as described in claim 8, characterized in that, The trapezoidal portion has a limiting groove, and the holding member is provided with a limiting protrusion that matches the limiting groove. The limiting protrusion is slidably disposed in the limiting groove. When the holding member slides along the waist of the trapezoidal portion, the limiting protrusion can abut against the side wall of the limiting groove along the first direction to limit the holding member.

10. The bending device as described in claim 8, characterized in that, The holding member has a forming part at one end facing the bearing member. The forming part is located on the side of the holding member away from the connecting member. The forming part is used to hold the workpiece when the bending assembly pushes against the end of the workpiece. The holding protrusion is located on the side of the forming part away from the connecting member.

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