Double bending die strip and bending machine capable of bending upward 90 degrees

Abstract

The present invention discloses a double bending die strip and a bending machine that bends upward 90 degrees. The double bending die strip comprises a first bending die strip and a second bending die strip. The second bending die strip is horizontally movable on one side of the first bending die strip through a second bending die strip translation mechanism. The first bending die strip comprises at least one pressing surface, and a bending angle is provided at the front end of the pressing surface. The bending angle is bent inward at an acute angle. A bending surface is provided on one side of the second bending die strip close to the first bending die strip, and the lower end of the bending surface extends downward in a hook shape. The bending machine comprises a bending swing mechanism, a bending flip mechanism, a lower die mechanism, a conveying mechanism, and a side positioning mechanism. The present invention sets the die head of the first bending die strip horizontally and the second bending die strip vertically, which can realize 90-degree bending or clamping bending of the sheet material in a small gap, thereby improving the bending efficiency.

Description

Technical Field

[0001] The invention relates to a double-bending die strip bent upwards by 90 degrees and a bending machine, belonging to the technical field of bending equipment. Background Art

[0002] At present, the labyrinth grooves of refrigerator side panels and refrigerator top panels are generally realized by rolling with a roller mill. The existing roller mill has the following disadvantages: (1) once the cross section is determined, it cannot be changed; (2) it is very complicated during installation and commissioning, and requires very professional installation and commissioning personnel; (3) it is not compatible with sheets with too large differences in thickness and material; (4) there are some differences between the rolling cross section and the theoretical design. In view of the above problems, a bending machine is used to bend the refrigerator side panels and refrigerator top panels into the required labyrinth grooves, but the existing bending machine is limited by the multiple bending method, which makes it impossible to achieve 90-degree bending or clamping bending between the upper bending part and the lower bottom plate when there is a small gap. Summary of the invention

[0003] In view of the problems existing in the above-mentioned prior art, the present invention provides a double-bending mold strip that is bent upward by 90 degrees, which can achieve a 90-degree bending when there is a small gap between the upper bending portion and the lower bottom plate, thereby improving the bending efficiency.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a double bending mold bar that is bent upward by 90 degrees, the double bending mold bar includes a first bending mold bar and a second bending mold bar, the second bending mold bar is horizontally movably arranged on one side of the first bending mold bar through a second bending mold bar translation mechanism; the first bending mold bar includes at least one clamping surface, the front end of the clamping surface is provided with a bending angle, and the bending angle is bent inward at an acute angle; the second bending mold bar is provided with a bending surface on the side close to the first bending mold bar, and the lower end of the bending surface extends downward in a hook shape.

[0005] Preferably, the first bending mold bar is an L-shaped structure, the longitudinal block of the first bending mold bar is arranged on the bending machine through the first bending mold bar mounting plate, the transverse block of the first bending mold bar is a slope with an angle of 30 degrees, the lower end face forms the clamping surface, and the 30-degree angle at the front end forms the bending angle.

[0006] Preferably, the second bending mold bar is an "I"-shaped structure, the upper end surface of the second bending mold bar is away from one end of the first bending mold bar and is arranged on the bending machine through a second bending mold bar mounting plate, the lower end surface of the second bending mold bar is close to one end of the first bending mold bar and is provided with a horizontal groove, and the front end forms the hook shape.

[0007] Preferably, the pressing surface of the first bending mold strip is arranged perpendicular to the bending surface of the second bending mold strip.

[0008] Preferably, the double bending mold strip also includes a double mold strip lifting frame, which includes a side frame plate and a frame, the frame is arranged in front of the side frame plate, the first bending mold strip mounting plate is arranged on the back of the side frame plate, and the second bending mold strip mounting plate is arranged under the lower plate of the frame.

[0009] Preferably, the second bending mold strip is arranged on the second bending mold strip mounting plate through a second bending mold strip translation mechanism; the second bending mold strip translation mechanism comprises a first swing cylinder, a second swing cylinder, a second bending mold strip swing arm, a support frame and a horizontal synchronous shaft, the first swing cylinder is obliquely mounted on the front portion of the side frame plate, the first swing cylinder is connected with the second bending mold strip swing arm through a piston, a movable hole is opened at a position corresponding to the second bending mold strip swing arm of the lower plate of the frame, the second bending mold strip swing arm passes through the movable hole on the lower plate of the frame and is connected with the top end of the second bending mold strip mounting plate mounted on the bottom of the double mold strip lifting frame, the second bending mold strip is mounted on the bottom end of the second bending mold strip mounting plate, the two ends of the horizontal synchronous shaft are respectively connected with the second bending mold strip swing arm, the second swing cylinder is mounted on the front portion of the side frame plate through the support frame, and the second swing cylinder corresponds to the second bending mold strip mounting plate.

[0010] The present invention also provides a bending machine adopting any of the above-mentioned double bending mold strips, the bending machine comprises a bending swing mechanism, a bending flip mechanism, a lower mold mechanism, a conveying mechanism and a side positioning mechanism, the bending swing mechanism, the bending flip mechanism and the lower mold mechanism are mounted on a bending bottom plate, the bending bottom plate is mounted on a machine base through a bending translation mechanism, the side positioning mechanism is installed on the machine base through a positioning translation mechanism, the conveying mechanism is mounted on the machine base through a conveying support frame, the positioning translation mechanism and the bending translation mechanism are symmetrically mounted on the front and rear sides of the installation base respectively, the bending swing mechanism, the bending flip mechanism and the lower mold mechanism are mounted on a bending bottom plate, the bending bottom plate is mounted on a machine base through a bending translation mechanism, the side positioning mechanism is installed on the machine base through a positioning translation mechanism, the conveying mechanism is mounted on the machine base through a conveying support frame, the positioning translation mechanism and the bending translation mechanism are symmetrically mounted on the front and rear sides of the installation base respectively, and the bending swing mechanism The bending and flipping mechanism and the lower mold mechanism are installed on the side frame plate, and the side frame plate is provided with an arc-shaped slide groove. The side frame plate is vertically mounted on the left and right sides of the bending bottom plate, the bending and swinging mechanism is mounted above the lower mold mechanism, the bending and flipping mechanism is mounted on the rear side of the lower mold mechanism, the conveying mechanism is mounted on the front side of the lower mold mechanism, and the side positioning mechanism is mounted on the front side of the conveying mechanism; the bending and swinging mechanism also includes a double-mold bar lifting mechanism, and the two sides of the double-mold bar lifting frame are mounted on the upper part of the side frame plate through the double-mold bar lifting mechanism, so that the second bending mold bar can move horizontally relative to the first bending mold bar.

[0011] Preferably, the lower mold mechanism includes a lower mold frame plate with its bottom vertically installed on the bending bottom plate and a lower mold bar installed on the lower mold frame plate. The two sides of the lower mold frame plate are respectively connected to the lower parts of the two side frame plates. The first bending mold bar and the second bending mold bar can be pressed down on the mold frame plate through the lifting of the double mold bar lifting cylinder.

[0012] Preferably, the bending and flipping mechanism includes a flipping mold strip, a mold strip flipping frame and a flipping drive mechanism, the mold strip flipping frame is rotatably mounted in an arc-shaped slide groove on the side frame plate, the flipping mold strip is installed on the mold strip flipping frame, and the mold strip flipping frame is driven to flip by the flipping drive mechanism.

[0013] Preferably, arc-shaped sliders that can rotate along the arc-shaped slide groove are installed at both ends of the mold strip flipping frame, and the arc-shaped sliders flip synchronously with the mold strip flipping frame. An arc-shaped rack is installed on each of the arc-shaped sliders. The flipping drive mechanism includes a flipping drive motor, a reducer connected to the flipping drive motor and a gear connected to the reducer. The gear is meshed with the arc-shaped rack. Limit blocks are provided at both ends of the arc-shaped slide groove. The flipping drive motor drives the arc-shaped rack to rotate, so that the arc-shaped slider rotates along the arc-shaped slide groove, thereby realizing the synchronous rotation of the mold strip flipping frame.

[0014] The beneficial effects of the present invention are as follows: the present invention sets the die head of the first bending die strip horizontally and the second bending die strip vertically, which can realize 90-degree bending or clamping bending of the sheet metal when there is a small gap, thereby improving the bending efficiency; at the same time, the bending method of 90-degree bending or clamping bending is combined with the CNC bending machine to meet the bending requirements of various cross-sections, which can simplify the structure of the CNC bending machine, reduce the movement of the CNC bending machine, and improve the line efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the bending and swinging mechanism of the present invention without the lifting cylinder;

[0016] Figure 2 for Figure 1 An enlarged schematic diagram of the double-bend mold strip at A in the middle;

[0017] Figure 3 It is a structural schematic diagram of the bending machine of the present invention;

[0018] Figure 4 It is a right side view of the bending machine of the present invention;

[0019] Figure 5 for Figure 4 The enlarged schematic diagram of point B in the middle;

[0020] Figure 6 The structural diagram of the bending machine without the bending swing mechanism, bending flip mechanism, lower die mechanism, bending bottom plate and side frame plate;

[0021] Figure 7 It is a 90 degree bending process with small gaps in the sheet metal;

[0022] Figure 8 It is the clamping bending process of the sheet metal with small gap;

[0023] In the figure: 1, machine base, 2, bending and swinging mechanism, 201, first bending mold strip, 202, second bending mold strip, 203, first bending mold strip mounting plate, 204, side frame plate, 205, frame, 207, double mold strip slide rail, 206, double mold strip lifting cylinder, 208, second bending mold strip mounting plate, 209, first swing cylinder, 210, second swing cylinder, 211, second bending mold strip swing arm, 212, support frame, 213, horizontal synchronous axis, 3, bending and turning mechanism, 301, turning mold strip, 302, mold strip turning frame, 303, turning drive mechanism, 304, arc-shaped slider, 305, arc-shaped rack , 306, gear, 4, lower mold mechanism, 401, lower mold bar, 402, lower mold frame plate, 5, conveying mechanism, 501, conveying bracket plate, 502, conveying rack belt, 503, pulley, 504, conveying drive mechanism, 505, conveying support frame, 6, side positioning mechanism, 601, side positioning base plate, 602, side positioning bracket, 603, side positioning plate, 604, side positioning mounting plate, 605, side positioning block, 606, adjustment block, 607, pad, 608, plate brush, 7, positioning and translation mechanism, 8, bending and translation mechanism, 9, bending base plate, 10, side frame plate, 1001, arc-shaped slide groove, 11, sheet material. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] like Figure 1 and Figure 2 As shown, a double bending mold bar that bends upward 90 degrees includes a first bending mold bar 201 and a second bending mold bar 202. The second bending mold bar 202 is horizontally movable on one side of the first bending mold bar 201 through a second bending mold bar translation mechanism; the first bending mold bar 201 includes at least one pressing surface, and the front end of the pressing surface is provided with a bending angle, and the bending angle is bent inward at an acute angle; the second bending mold bar 202 is provided with a bending surface on the side close to the first bending mold bar 201, and the lower end of the bending surface extends downward in a hook shape. In this embodiment, the double bending mold bar also includes a double mold bar lifting frame, which includes a side frame plate 204 and a frame 205. The frame 205 is arranged in front of the side frame plate 204, the first bending mold bar mounting plate 203 is arranged on the back of the side frame plate 204, and the second bending mold bar mounting plate 208 is arranged below the lower plate of the frame 205.

[0026] The first bending mold bar 201 is an L-shaped structure. The longitudinal block of the first bending mold bar 201 is arranged on the bending machine through the first bending mold bar mounting plate 203. The transverse block of the first bending mold bar 201 is a slope with an angle of 30 degrees. The lower end surface forms the clamping surface, and the 30-degree angle at the front end forms the bending angle.

[0027] The second bending mold bar 202 is an "I"-shaped structure, and the upper end face of the second bending mold bar 202 is disposed on the bending machine through the second bending mold bar mounting plate 208 away from the first bending mold bar 201, and the lower end face of the second bending mold bar 202 is provided with a horizontal groove near the end of the first bending mold bar 201, and the front end forms the hook shape. In this embodiment, the pressing surface of the first bending mold bar 201 is disposed perpendicularly to the bending surface of the second bending mold bar 202.

[0028] The second bending mold strip is arranged on the second bending mold strip mounting plate (208) through a second bending mold strip translation mechanism, and the second bending mold strip translation mechanism includes a first swing cylinder 209, a second swing cylinder 210, a second bending mold strip swing arm 211, a support frame 212 and a horizontal synchronization shaft 213. In this embodiment, there are two first swing cylinders 209, four second swing cylinders 210, and two second bending mold strip swing arms 211. Each of the first swing cylinders 209 is obliquely installed at the front of the side frame plate 204, and each of the first swing cylinders 209 is connected to the second bending mold strip swing arm 211 through a piston. An active hole is opened at a position corresponding to the second bending mold strip swing arm 211 on the lower plate of the frame 205. The second bending mold strip swing arm 211 passes through the active hole on the lower plate of the frame 205 and is connected to the top end of the second bending mold strip mounting plate 208 mounted on the bottom of the double mold strip lifting frame. The second bending mold strip 202 is installed on the second bending mold strip mounting plate 208. At the bottom end of the mounting plate 208, both ends of the horizontal synchronization shaft 213 are respectively connected to the second bending mold bar swing arm 211, and the first swing cylinder 209 drives the second bending mold bar swing arm 211 to move, so that the second bending mold bar 202 can be translated forward and backward relative to the first bending mold bar 201. The second swing cylinder 210 is installed on the front part of the side frame plate 204 through a support frame. The second swing cylinder 210 corresponds to the second bending mold bar mounting plate 208, so that the second swing cylinder 210 increases the power for the translation of the second bending mold bar 202.

[0029] like Figures 3 to 6As shown, a bending machine using any of the above-mentioned double bending mold strips includes a bending swing mechanism 2, a bending flip mechanism 3, a lower mold mechanism 4, a conveying mechanism 5 and a side positioning mechanism 6. In this embodiment, the bending swing mechanism 2, the bending flip mechanism 3, and the lower mold mechanism 4 are mounted on a bending bottom plate 9, and the bending bottom plate 9 is mounted on a machine base 1 through a bending translation mechanism 8. The side positioning mechanism 6 is installed on the machine base 1 through a positioning translation mechanism 7. The conveying mechanism 5 is mounted on the machine base 1 through a conveying support frame 505. The positioning translation mechanism 6 The bending translation mechanism 7 is symmetrically mounted on the front and rear sides of the mounting base 1, respectively. The bending swing mechanism 2, the bending flip mechanism 3 and the lower mold mechanism 4 are mounted on the side frame plate 10. The side frame plate 10 is provided with an arc-shaped slide groove 1001. The side frame plate 10 is vertically mounted on the left and right sides of the bending bottom plate 9. The bending swing mechanism 2 is mounted above the lower mold mechanism 4, the bending flip mechanism 3 is mounted on the rear side of the lower mold mechanism 4, the conveying mechanism 5 is mounted on the front side of the lower mold mechanism 4, and the side positioning mechanism 6 is mounted on the front side of the conveying mechanism 5. Figure 6As shown, in this embodiment, the conveying mechanism 5 includes a conveying bracket plate 501, a conveying rack belt 502, and a conveying drive mechanism 504. There are two conveying bracket plates 501, and the two conveying bracket plates 501 are parallel to each other and vertically mounted on a conveying support frame 505. Pulleys 503 are respectively provided at both ends of the conveying bracket plate 501. The conveying rack belt 502 is mounted on two pulleys 503. The conveying rack belt 502 includes a belt and a rack attached to the lower surface of the belt. The driving mechanism includes a conveying drive motor, a reducer connected to the conveying drive motor, a transmission pulley and a transmission belt connected to the reducer. The transmission pulley is connected to the pulley at one end of the conveying bracket plate through a transmission belt, and the conveying drive motor drives the pulley to rotate through the transmission belt. The conveying drive motor is realized by a servo motor. In this embodiment, the side positioning mechanism 6 includes a side positioning base plate 601, a side positioning plate 603 mounted on the side positioning base plate 601 through a side positioning bracket 602, and a side positioning block 605 mounted on the side positioning plate 603 through a side positioning mounting plate 604. The side positioning plate 603 is also equipped with a plurality of side positioning adjustment blocks 606, each of which is connected to a pad 607 through an adjustment screw, and the pad 607 is equipped with a plate brush 608 through a pad. There are four side positioning blocks 605, and each side positioning block 605 corresponds to a side positioning mounting plate 604. In this embodiment, the structures of the positioning translation mechanism 7 and the bending translation mechanism 8 are completely the same, and both include a translation guide rail mounted on the machine base 1 through a vertically set guide rail frame plate, a translation motor mounted on the machine base 1, a translation screw connected to the translation motor through a translation transmission mechanism, and a translation screw sleeve meshed with the translation screw. There are two guide rail frames, and each translation guide rail corresponds to a guide rail frame plate. In this embodiment, the side positioning base plate 601 is set on the translation guide rail of the positioning and translation mechanism 7 through the side positioning base plate slider installed at the bottom and moves back and forth. When the translation motor of the positioning and translation mechanism 7 drives the translation screw of the positioning and translation mechanism 7, the side positioning mechanism 6 is driven to move back and forth. The bending base plate 9 is set on the translation guide rail of the bending and translation mechanism 8 through the bending base plate slider installed at the bottom and moves back and forth. When the translation motor of the bending and translation mechanism 8 drives the bending and translation screw of the bending and translation mechanism 8, the bending swing mechanism 2, the bending flipping mechanism 3, and the lower mold mechanism 4 on the bending base plate 9 are driven to move back and forth; the translation transmission mechanism is realized by a rack belt, and the translation motor is realized by a servo motor.

[0030] like Figure 1 , 3As shown in Figures 4 and 5, the bending and swinging mechanism 2 includes the first bending mold strip 201 and the second bending mold strip 202, the first bending mold strip mounting plate 203, the second bending mold strip mounting plate 208, the double mold strip lifting frame and the second bending mold strip translation mechanism as described above. Both sides of the double mold strip lifting frame are installed on the upper part of the side frame plate 10 through the double mold strip lifting mechanism, so that the second bending mold strip 202 can move horizontally relative to the first bending mold strip 201. In this embodiment, the second bending mold strip mounting plate 208 is slidably connected to the bottom surface of the lower plate of the frame 205 through a guide assembly. A limit block is provided at the front end of the lower plate of the frame 205. The guide assembly includes a fixed plate, a guide column and a guide sleeve. The guide column is fixed to the bottom surface of the lower plate of the frame 205 through the fixed plate, and the guide sleeve is fixed to the second bending mold strip mounting plate 208 through a set screw. The first bending mold strip mounting plate 203 is also provided with a limit screw, so that the second bending mold strip 202 can move horizontally forward and backward between the limit screw and the limit block. In this embodiment, the bending swing mechanism 2 also includes a double-mold strip lifting mechanism, which includes a double-mold strip lifting cylinder 206 and a double-mold strip slide rail 207. There are three double-mold strip lifting cylinders 206 and two double-mold strip slide rails 207. Each of the double-mold strip lifting cylinders 206 is installed on the upper plate of the frame 205 through a piston. The side plate of the frame 205 is installed on the double-mold strip slide rail 207 through a double-mold strip slider. The double-mold strip slide rail 207 is vertically installed on the side frame plate 10. The double-mold strip lifting cylinder 206 drives the double-mold strip lifting frame to rise and fall along the vertical double-mold strip slide rail 207, thereby driving the first bending mold strip 201 and the second bending mold strip 202 to rise and fall.

[0031] like Figures 3 to 5 As shown, the lower mold mechanism 4 includes a lower mold frame plate 402 with a bottom vertically installed on the bending bottom plate 9 and a lower mold bar 401 installed on the lower mold frame plate 402. The two sides of the lower mold frame plate 402 are respectively connected to the lower parts of the two side frame plates 10. Through the lifting of the double mold bar lifting cylinder 206, the first bending mold bar 201 can descend to press the sheet 11 on the lower mold frame plate 402.

[0032] like Figures 3 to 5As shown, the bending and flipping mechanism 3 includes a flipping mold strip 301, a mold strip flipping frame 302 and a flipping driving mechanism 303. The mold strip flipping frame 302 is rotatably mounted in an arc-shaped slide groove 1001 on the side frame plate 1001. The flipping mold strip 301 is installed on the mold strip flipping frame 302. The mold strip flipping frame 302 is driven to flip by the flipping driving mechanism 303. The flipping driving mechanism is realized by a motor, a reducer, a rack and a gear. In this embodiment, arc-shaped sliders 304 capable of rotating along the arc-shaped slide groove 1001 are installed at both ends of the mold strip flipping frame 302. The arc-shaped sliders 304 flip synchronously with the mold strip flipping frame 302. An arc-shaped rack 305 is installed on each of the arc-shaped sliders 304. The flipping drive mechanism 303 includes a flipping drive motor, a reducer connected to the flipping drive motor, and a gear 306 connected to the reducer. The gear 306 is meshed with the arc-shaped rack 305. A limit block is set at the lower port of the arc-shaped slide groove 1001. The flipping drive motor drives the arc-shaped rack 305 to rotate, so that the arc-shaped slider 304 rotates along the arc-shaped slide groove 304, thereby realizing the synchronous rotation of the mold strip flipping frame 243.

[0033] In this embodiment, Figure 7 The 90-degree bending process shown is as follows: after the sheet 11 is transported to this station by the conveying mechanism 5, the side positioning mechanism 6 moves sideways to complete the positioning, the first bending die strip 201 of the bending swing mechanism 2 is pressed down by the double-die strip lifting mechanism to press the sheet 11, and the flip die strip 301 of the bending flip mechanism 3 rotates 90 degrees driven by the reducer of the flip drive motor to complete the bending, and the bending returns, the first bending die strip 201 is lifted by the double-die strip lifting mechanism, and the sheet 11 is transported out of the bending machine. Figure 8 The clamping and bending process shown is as follows: after the sheet 11 is transported to this workstation via the conveying mechanism 5, the side positioning mechanism 6 retreats sideways to complete the positioning, the second bending mold strip 202 of the bending swing mechanism 2 descends via the double-mold strip lifting mechanism, and the second bending mold strip 202 moves forward and backward through the first swing cylinder 209 of the second bending mold strip translation mechanism to clamp the angle of the sheet 11 from 45 degrees to 0 degrees. After the clamping and bending is completed, the first swing cylinder 209 retreats, the second bending mold strip 202 is lifted via the double-mold strip lifting mechanism, and the sheet 11 is transported out of the bending machine.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A double-bend mold strip bent upward 90 degrees, characterized in that: The double bending mold bar comprises a first bending mold bar (201) and a second bending mold bar (202), wherein the second bending mold bar (202) is horizontally movably arranged on one side of the first bending mold bar (201) via a second bending mold bar translation mechanism; the first bending mold bar (201) comprises at least one pressing surface, a front end of the pressing surface is provided with a bending angle, and the bending angle is bent inwardly to form an acute angle; a side of the second bending mold bar (202) close to the first bending mold bar (201) is provided with a bending surface, and the lower end of the bending surface extends downward to form a hook shape; The first bending die strip (201) is an L-shaped structure, the longitudinal block of the first bending die strip (201) is arranged on the bending machine through the first bending die strip mounting plate (203), the transverse block of the first bending die strip (201) is a slope with an angle of 30 degrees, the lower end surface forms the pressing surface, and the front end angle of 30 degrees forms the bending angle; The second bending mold bar (202) is an "I"-shaped structure, the upper end face of the second bending mold bar (202) being away from the end of the first bending mold bar (201) being arranged on the bending machine via a second bending mold bar mounting plate (208), the lower end face of the second bending mold bar (202) being close to the end of the first bending mold bar (201) being provided with a horizontal groove, and the front end forming the hook shape; The pressing surface of the first bending mould strip (201) and the bending surface of the second bending mould strip (202) are arranged perpendicularly; The double bending mold strip also includes a double mold strip lifting frame, which includes a side frame plate (204) and a frame (205), wherein the frame (205) is arranged in front of the side frame plate (204), the first bending mold strip mounting plate (203) is arranged on the back of the side frame plate (204), and the second bending mold strip mounting plate (208) is arranged below the lower plate of the frame (205).

2. A double-bent mold strip bent upward 90 degrees according to claim 1, characterized in that: The second bending die strip is arranged on the second bending die strip mounting plate (208) through a second bending die strip translation mechanism; the second bending die strip translation mechanism comprises a first swing cylinder (209), a second swing cylinder (210), a second bending die strip swing arm (211), a support frame (212) and a horizontal synchronization shaft (213); the first swing cylinder (209) is obliquely mounted on the front part of the side frame plate (204); the first swing cylinder (209) is connected to the second bending die strip swing arm (211) through a piston; the lower plate of the frame (205) and the second bending die strip swing arm (211) are located at positions corresponding to each other. A movable hole is opened at the position where the second bending mold strip swing arm (211) passes through the movable hole on the lower plate of the frame (205) and is connected to the top end of the second bending mold strip mounting plate (208) mounted on the bottom of the double mold strip lifting frame. The second bending mold strip (202) is mounted on the bottom end of the second bending mold strip mounting plate (208). Both ends of the horizontal synchronization shaft (213) are respectively connected to the second bending mold strip swing arm (211). The second swing cylinder (210) is mounted on the front part of the side frame plate (204) through a support frame. The second swing cylinder (210) corresponds to the second bending mold strip mounting plate (208).

3. A bending machine using the double bending die strip according to claim 1 or 2, the bending machine further comprising a bending swing mechanism (2), a bending flip mechanism (3), a lower die mechanism (4), a conveying mechanism (5) and a side positioning mechanism (6), characterized in that: The bending swing mechanism (2), the bending flip mechanism (3), and the lower mold mechanism (4) are mounted on a bending base plate (9); the bending base plate (9) is mounted on the machine base (1) via a bending translation mechanism (8); the side positioning mechanism (6) is mounted on the machine base (1) via a positioning translation mechanism (7); the conveying mechanism (5) is mounted on the machine base (1) via a conveying support frame (505); the positioning translation mechanism (7) and the bending translation mechanism (8) are symmetrically mounted on the front and rear sides of the machine base (1), respectively; the bending swing mechanism (2), the bending flip mechanism (3), and the lower mold mechanism (4) are mounted on a side frame plate (10); the bending swing mechanism (2) is mounted on the machine base (11); The bending and swinging mechanism (2) is arranged above the lower mold mechanism (4), the bending and flipping mechanism (3) is arranged on the rear side of the lower mold mechanism (4), the conveying mechanism (5) is arranged on the front side of the lower mold mechanism (4), the side positioning mechanism (6) is arranged on the front side of the conveying mechanism (5), the side frame plate (10) is vertically arranged on the left and right sides of the bending bottom plate (9), and the side frame plate (10) is provided with an arc-shaped slide groove (1001); the bending and swinging mechanism (2) also includes a double-mold strip lifting mechanism, and the two sides of the double-mold strip lifting frame are installed on the upper part of the side frame plate (10) through the double-mold strip lifting mechanism, so that the second bending mold strip (202) can move horizontally relative to the first bending mold strip (201).

4. A bending machine according to claim 3, characterized in that: The lower mold mechanism (4) comprises a lower mold frame plate (402) whose bottom is vertically mounted on the bending bottom plate (9) and a lower mold bar (401) mounted on the lower mold frame plate (402), and two sides of the lower mold frame plate (402) are respectively connected to the lower parts of two side frame plates (10).

5. A bending machine according to claim 3, characterized in that: The bending and turning mechanism (3) comprises a turning mould strip (301), a mould strip turning frame (302) and a turning drive mechanism (303); the mould strip turning frame (302) is rotatably mounted in an arc-shaped slide groove (1001) on a side frame plate (10); the turning mould strip (301) is mounted on the mould strip turning frame (302); and the mould strip turning frame (302) is driven to turn by the turning drive mechanism (303).

6. A bending machine according to claim 5, characterized in that: Arc-shaped sliders (304) capable of rotating along the arc-shaped slide groove (1001) are installed at both ends of the mold strip flipping frame (302); the arc-shaped sliders (304) flip synchronously with the mold strip flipping frame (302); each of the arc-shaped sliders (304) is installed with an arc-shaped rack (305); the flipping drive mechanism (303) comprises a flipping drive motor, a reducer connected to the flipping drive motor, and a gear (306) connected to the reducer; the gear (306) meshes with the arc-shaped rack (305); and limit blocks are provided at both ends of the arc-shaped slide groove (1001) to enable the arc-shaped slider (304) to rotate along the arc-shaped slide groove (1001).

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