A bending machine with stable forming properties

Abstract

This invention relates to a stable bending machine, comprising a frame, a first bending mechanism and a second bending mechanism for symmetrically bending metal strips, a first translation mechanism for driving the first bending mechanism to translate left and right, and a second translation mechanism for driving the second bending mechanism to translate left and right. The first and second translation mechanisms are arranged on the frame, with the first bending mechanism mounted on the power output end of the first translation mechanism and the second bending mechanism mounted on the power output end of the second translation mechanism. The invention is characterized by further including a cutting device and a midpoint clamping mechanism. The midpoint clamping mechanism is located on the frame between the first and second bending mechanisms, and the cutting device is located on the frame to the left of the first bending mechanism. This stable bending machine can perform bending operations on metal strips at different angles, and is unaffected by the rotation of the metal strip during the bending process, resulting in high product forming stability.

Description

Technical Field

[0001] This invention relates to a bending machine, and more particularly to a bending machine with stable forming properties. Background Technology

[0002] In the production of automotive parts, metal strips of a certain length need to be bent symmetrically multiple times to form a gate shape before being assembled according to requirements (such as as a seat frame). Currently, bending machines used for this type of metal strip bending generally include an operating table, a gripping mechanism, and two bending mechanisms. The gripping mechanism is used to grip the metal strip of a fixed length and fix it horizontally on the operating table. Then, the two bending mechanisms perform multiple symmetrical bends on the metal strip according to production requirements.

[0003] Depending on the intended use of the finished product, the bending angles at different bending points on the same side of the metal strip vary. Therefore, the metal strip needs to be rotated a certain angle around its axis before the next bending. Because the metal strip tends to deviate from its original position after the first bend, the second bend after rotation makes it even more likely that the midpoint of the metal strip will shift, ultimately resulting in an asymmetrical and unusable finished product, severely impacting the quality of the finished product. Summary of the Invention

[0004] The problem this invention aims to solve is to provide a bending machine with stable forming capabilities. This stable bending machine can perform bending operations on metal strips at different angles, and is unaffected by the rotation of the metal strip during the bending process, resulting in high product forming stability. The technical solution adopted is as follows:

[0005] A stable bending machine includes a frame, a first bending mechanism and a second bending mechanism for symmetrically bending metal strips, a first translation mechanism for driving the first bending mechanism to translate left and right, and a second translation mechanism for driving the second bending mechanism to translate left and right. The first translation mechanism and the second translation mechanism are arranged on the frame. The first bending mechanism is installed on the power output end of the first translation mechanism, and the second bending mechanism is installed on the power output end of the second translation mechanism. The bending machine further includes a cutting device and a midpoint clamping mechanism. The midpoint clamping mechanism is arranged on the frame and between the first bending mechanism and the second bending mechanism. The cutting device is arranged on the frame and to the left of the first bending mechanism.

[0006] When a bending machine performs a bending operation, it includes the following steps:

[0007] Step 1: The metal strip is continuously fed horizontally from left to right to the first bending mechanism. The first bending mechanism clamps the metal strip and pulls it to the right end of the metal strip, where it passes through the midpoint clamping mechanism.

[0008] Step 2: The second bending mechanism clamps the right end of the metal strip, pulls the middle part of the metal strip past the midpoint clamping mechanism, and the cutting device cuts the metal strip according to the fixed length. The first bending mechanism clamps the left end of the metal strip.

[0009] Step 3: The first bending mechanism and the second bending mechanism work together to fix the metal strip and convey it horizontally, sending the metal strip to its midpoint at the midpoint clamping mechanism, which then clamps the midpoint of the metal strip.

[0010] Step 4: The first bending mechanism and the second bending mechanism perform symmetrical bending operations on both sides of the midpoint of the metal strip to bend the metal strip into a finished product;

[0011] Step 5: The midpoint clamping mechanism releases the finished product after the bending operation is completed. The finished product leaves the bending machine. Repeat steps 1 to 4 to perform the next bending operation of the metal strip.

[0012] During operation of the bending machine described in this manual, the metal strip is conveyed horizontally from left to right.

[0013] The first bending mechanism and the second bending mechanism symmetrically bend a metal strip of a certain length multiple times on both sides of the midpoint of the metal strip; the first translation mechanism and the second translation mechanism correspondingly drive the first bending mechanism and the second bending mechanism to translate between each bending point along the length direction of the metal strip.

[0014] The aforementioned midpoint clamping mechanism is located between the first bending mechanism and the second bending mechanism. When the metal strip passes through the midpoint clamping mechanism in a horizontal state, the clamping member clamps the midpoint of the metal strip, and then the bending mechanisms located on both sides of the midpoint clamping mechanism perform bending operations on the metal strip.

[0015] In a preferred embodiment of the present invention, in steps 1 to 4, the midpoint clamping mechanism holds the metal strip in place when the metal strip does not move left or right. Throughout the entire bending process of the metal strip, from the initial feeding of the metal strip, the midpoint clamping mechanism holds the metal strip in place when it does not move left or right, ensuring the metal strip remains stable during various operations and preventing deviation.

[0016] As a further preferred embodiment of the present invention, the bending machine further includes a wire-sorting device; the wire-sorting device is disposed on the frame and located to the left of the cutting device, and the wire-sorting device arranges the metal strip to be bent into a horizontal state from left to right. Before bending, the metal strip is first sorted, the coiled metal strip is indirectly unwound, and then the bent coiled metal strip is arranged into a horizontal state from left to right before being fed into the bending machine. The wire-sorting device uses multiple limiting wheels divided into two groups, which are staggered from both sides of the horizontal plane and from both sides of the vertical plane along the conveying direction of the metal strip. When the metal strip is conveyed, it is clamped and arranged from both the horizontal and vertical directions.

[0017] As a preferred embodiment of the present invention, the midpoint clamping mechanism includes a fixed support, a rotary drive mechanism, a rotating component, a clamping drive mechanism, and a clamping component; the rotary drive mechanism is mounted on the fixed support, the rotating component is vertically and rotatably mounted on the fixed support and connected to the power output end of the rotary drive mechanism; the clamping component is movably disposed on the rotating component, the clamping component is connected to the power output end of the clamping drive mechanism, and the clamping position of the clamping component is located on the rotation axis of the rotating component.

[0018] Throughout the bending process, the rotary drive mechanism drives the rotating component to rotate in the vertical plane according to the bending requirements of the metal strip. The metal strip rotates with the rotating component while its midpoint is held in place by the clamping component. Because the extension direction of the metal strip coincides with the rotation axis of the rotating component during horizontal transport, when the clamping position is on the rotation axis of the rotating component, meaning the midpoint of the metal strip is held and fixed on the rotation axis, in subsequent bending operations, regardless of how the rotating component rotates or how the bending operations on both sides are performed, the midpoint of the metal strip and the two small segments on either side of the midpoint remain aligned with the rotation axis of the rotating component. This prevents offset and improves the stability of the bending operations on both sides, ensuring the quality of the finished product after bending.

[0019] As a further preferred embodiment of the present invention, the rotating component is a large, sheet-like fan shape, with a notch extending through the center of a smaller fan-shaped portion corresponding to the rotating component. The clamping component and the clamping drive mechanism are both installed in the notch. Two sides of the rotating component have convex portions with rounded edges, and the fixed support has recesses that match the convex portions. The convex portions and recesses are rotatably fitted, and the center of the edge of the convex portion is located on the rotation axis of the rotating component. The rotatable fit between the convex portions on both sides of the rotating component and the recesses on the fixed support allows the rotating component to rotate in a vertical plane. A metal strip passes horizontally through the notch, and the clamping component clamps the metal strip along the rotation axis of the rotating component.

[0020] The aforementioned rotating component can be driven by a corresponding rotary drive mechanism. For example, the rotating component can adopt a gear structure, with large, fan-shaped rotating components having meshing teeth along their circumference. A servo motor and a transmission gear set drive the rotating component to rotate in the vertical plane. The first gear of the transmission gear set is connected to the output shaft of the rotary servo motor, and the last gear of the transmission gear set meshes with the rotating component. This also reduces the overall space occupied by the rotating component, making the structure of the entire midpoint clamping mechanism more compact. Based on this structure, the fixed support can include two support plates, forming an installation seam between them. The rotating component is placed in the installation seam, making the installation structure of the rotating component more compact and further reducing the space occupied. Furthermore, notches corresponding to the notched corners and facing downwards are made on the two support plates. When the metal strip is bent, the rotating component rotates until the notched corners face downwards, allowing the bent metal strip to naturally fall off the bending machine from the notched corners and notches.

[0021] As a further preferred embodiment of the present invention, a swing arm is provided at the notched corner, the inner end of which is swayably connected to the first side of the rotating component and close to the rotation center of the rotating component; the clamping drive mechanism includes a clamping drive cylinder, the cylinder body of which is hinged to the outer end of the swing arm, and the piston rod end of which is fixedly connected to the outer end of the first side of the rotating component. The swing arm and the second side of the rotating component together constitute the clamping component. Driven by the clamping drive mechanism, the swing arm swings, clamping the passing metal strip between the inner end of the swing arm and the inner end of the second side of the rotating component.

[0022] As a preferred embodiment of the present invention, both the first bending mechanism and the second bending mechanism include a translation seat, a front baffle, an end bending member, an end bending drive mechanism, a middle bending member, and a middle bending drive mechanism. The end bending drive mechanism and the middle bending drive mechanism are both disposed on the translation seat and located behind the front baffle. The front baffle is provided with an end bending through hole for the end bending member to extend or retract, and a middle bending through hole for the middle bending member to extend or retract. The end bending member is connected to the power output end of the end bending drive mechanism and is located in the end bending through hole, and the middle bending member is connected to the power output end of the middle bending drive mechanism and is located in the middle bending through hole.

[0023] The aforementioned end bending component is used to bend the end of a metal strip. The end bending drive mechanism drives the end bending component to extend or retract into the end bending through hole and to rotate the end bending component. When the end bending component extends out of the end bending through hole, it performs a bending operation on the end of the metal strip. After completing the bending operation, it retracts into the end bending through hole.

[0024] The aforementioned central bending component is used to bend the middle part of the metal strip. The central bending drive mechanism drives the central bending component to extend or retract into the central bending through hole and to rotate the central bending component. When the central bending component extends out of the central bending through hole, it performs a bending operation on the middle part of the metal strip. After the bending operation is completed, it retracts into the central bending through hole.

[0025] After the metal strip is horizontally fixed at its midpoint, the middle bending component retracts, and the end bending components extend first to bend both ends of the metal strip. After the ends of the metal strip are bent, the end bending components retract, the bending mechanism moves to each bending point, and the middle bending component extends again to bend each bending point of the metal strip. Because the entire metal strip is positioned in front of the front baffle during bending, while the end bending drive mechanism and the middle bending drive mechanism are located behind the front baffle, the entire bending mechanism is compact and occupies little space. Furthermore, sufficient space is left in front of the front baffle, ensuring that the bent portion does not touch other parts of the bending mechanism when the metal strip rotates, thus guaranteeing the stability of the metal strip during the bending process.

[0026] As a further preferred embodiment of the present invention, the end bending member includes a first base block and a first winding block, the first winding block being located in the circumferential direction of the first base block; the end bending driving mechanism includes a first telescopic mechanism for driving the first base block to extend out or retract into the end bending through hole, and a first rotation mechanism for driving the first winding block to rotate around the first base block.

[0027] The distance between the first base block and the first winding block is typically matched to the metal strip to be bent. The end of the metal strip passes between the first base block and the first winding block, positioning the first base block on one side of the end of the metal strip. Then, the first winding block is driven to rotate around the first base block, bending the portion of the metal strip between its end and the first base block. After the end of the metal strip is bent, the first telescopic mechanism drives the first base block to retract, preventing the first base block from obstructing subsequent bending of the metal strip.

[0028] The aforementioned first telescopic mechanism can be driven by a cylinder, specifically including a first cylinder with a horizontally positioned cylinder body and a horizontally forward-facing piston rod. A first base block is mounted on the end of the piston rod. The aforementioned first rotating mechanism can be driven by a motor and a transmission wheel set, including a rotation servo motor, a first transmission wheel set, and a first rotating sleeve. The first rotating sleeve is rotatably fitted onto the piston rod of the aforementioned first cylinder. A first winding block is disposed on the front end face of the first rotating sleeve. The first rotating sleeve is connected to the output shaft of the rotation servo motor via the first transmission wheel set. Since the first rotating sleeve is fitted onto the piston rod of the first cylinder, when the first cylinder drives the first base block to extend or retract, it does not hinder the rotation of the first rotating sleeve. The first rotating sleeve rotates under the drive of the rotation servo motor and the first transmission wheel set, causing the first winding block to rotate around the first base block.

[0029] As a further preferred embodiment of the present invention, the central bending member includes a second base block and at least one second winding block, each second winding block being located in the circumferential direction of the second base block, and the front side of the second base block being provided with a limiting groove passing through its rotation center; the central bending driving mechanism includes a second rotation mechanism for driving each second winding block to rotate around the second base block, a third rotation mechanism for driving the second base block to rotate, and a second telescopic mechanism for driving each second winding block to extend out or retract into the central bending through hole.

[0030] The metal wire passes horizontally through the limiting groove on the second base block, which guides and limits the metal wire. During bending, the second telescopic mechanism drives the second winding block to extend out of the middle bending through hole, and then the second and third rotating mechanisms drive the second winding block and the second base block to rotate respectively, performing a bending operation on the middle of the metal wire according to production requirements.

[0031] The second rotating mechanism can also be driven by a motor and a transmission wheel set. To save space and optimize the structure of the entire bending mechanism, the second rotating mechanism can share a rotating servo motor with the first rotating mechanism. In addition to the shared rotating servo motor, the second rotating mechanism also includes a second transmission wheel set and a second transmission sleeve. The third rotating mechanism, due to its smaller rotation amplitude, can be driven by a cylinder to rotate the rotating shaft. Specifically, it includes a second cylinder, a swing arm, and a rotating shaft. The rotating shaft is horizontally arranged in the front-rear direction. The second base block is installed at the front end of the rotating shaft. The cylinder body of the second cylinder is horizontally arranged. The piston rod of the second cylinder is perpendicular to the extension direction of the rotating shaft. One end of the swing arm is fixedly connected to the rear end of the rotating shaft, and the other end of the swing arm is hinged to the piston rod of the second cylinder. The second cylinder pushes one end of the swing arm to swing left and right, causing the other end of the swing arm to drive the rotating shaft to rotate slightly. The second rotating sleeve can be rotatably sleeved on the rotating shaft. The second winding block is set on the front end face of the second rotating sleeve. The second rotating sleeve is connected to the output shaft of the second motor through the second transmission wheel set.

[0032] The aforementioned second telescopic mechanism can be driven by a telescopic motor. Specifically, it includes a telescopic motor and a push block. The push block is mounted on the output shaft of the telescopic motor. The rear part of the second rotating sleeve has a snap-fit ​​groove along its circumference, and the lower part of the push block engages with the snap-fit ​​groove. The telescopic motor drives the push block to extend and retract, causing the second rotating sleeve to move back and forth along the rotation axis, thereby causing the second winding block to extend or retract into the central bending through hole.

[0033] Compared with the prior art, the present invention has the following advantages:

[0034] The present invention provides a stable bending machine with a midpoint clamping mechanism between the first bending mechanism and the second bending mechanism for holding a metal strip. When the metal strip passes through the midpoint clamping mechanism in a horizontal state, the clamping element clamps the midpoint of the metal strip. During the subsequent bending operation, the first bending mechanism and the second bending mechanism on both sides of the midpoint clamping mechanism bend the metal strip at different angles. The metal strip will not deviate or be affected by the rotation of the bending operation, thereby improving the stability of the bending operation on both sides and ensuring the quality of the finished product after bending. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention;

[0036] Figure 2 for Figure 1 A structural diagram of the central frame, cable management device, first translation mechanism, and second translation mechanism;

[0037] Figure 3 for Figure 1 A schematic diagram of the middle cutting device and the first bending mechanism;

[0038] Figure 4 for Figure 1 A schematic diagram of the midpoint clamping mechanism;

[0039] Figure 5 for Figure 4 Side view;

[0040] Figure 6 for Figure 5 Rear view;

[0041] Figure 7 for Figure 4 Assembly side view of the rotating part and the clamping part;

[0042] Figure 8 for Figure 1 A schematic diagram of the second bending mechanism;

[0043] Figure 9 for Figure 8 Internal structure diagram of the middle sliding seat and front baffle;

[0044] Figure 10 for Figure 9 Schematic diagram of the mid-end bending drive mechanism;

[0045] Figure 11 for Figure 9 A schematic diagram of the bending drive mechanism in the middle section;

[0046] Figure 12 for Figure 9 A structural diagram from another perspective;

[0047] The markings are as follows:

[0048] 1-Frame, 2-Cable management device, 201-Limiting wheel, 3-Cutting device (cutter).

[0049] 4-First bending mechanism, 5-Second bending mechanism, 90-Servo motor, 91-Transfer seat, 92-Front baffle, 93-End bending component, 931-First base block, 932-First winding block, 94-End bending drive mechanism, 941-First telescopic mechanism (first cylinder), 942-First rotating mechanism, 9421-First transmission wheel set, 9422-First rotating sleeve, 95-Middle bending component, 951-Second base block, 9511-Limit 952-Second winding block, 96-Middle bending drive mechanism, 961-Second rotating mechanism, 9611-Second transmission wheel set, 9612-Second rotating sleeve, 962-Third rotating mechanism, 9621-Second cylinder, 9622-Swing rod, 9623-Rotating shaft, 963-Second telescopic mechanism, 9631-Telescopic motor, 9632-Push block, 9633-Snap-fit ​​groove, 97-End bending through hole, 98-Middle bending through hole;

[0050] 6-First translation mechanism, 7-Second translation mechanism, 671-Translation drive motor, 672-Screw, 673-Guide rail, 674-Guide block;

[0051] 8-Midpoint clamping mechanism, 81-Fixed support, 811-Support plate, 812-Mounting seam, 813-Notch, 82-Rotary drive mechanism, 821-Rotary servo motor, 83-Rotating component, 831-Corner notch, 832-Protrusion, 833-First side, 834-Second side, 84-Clamping drive mechanism (clamping drive cylinder), 85-Clamping component, 851-Swing arm. Detailed Implementation

[0052] The following description, in conjunction with the accompanying drawings and preferred embodiments of the present invention, will provide further details.

[0053] like Figure 1 As shown, a stable bending machine includes a frame 1, a wire organizing device 2, a cutting device 3, a first bending mechanism 4, a second bending mechanism 5, a first translation mechanism 6, a second translation mechanism 7, and a midpoint clamping mechanism 8. The wire organizing device 2, the first translation mechanism 6, the midpoint clamping mechanism 8, and the second translation mechanism 7 are arranged sequentially from left to right on the frame 1 according to the metal strip conveying direction. The first bending mechanism 4 is mounted on the power output end of the first translation mechanism 6, and the second bending mechanism 5 is mounted on the power output end of the second translation mechanism 7. In this embodiment, to simplify the assembly of the cutting device 3, as shown... Figure 3As shown, the cutting device 3 is installed on the first bending mechanism 4 and is located on the left side of the first bending mechanism 4. At the same time, the cutting device 3 uses a cutter that can clamp and cut the metal strip to help the first bending mechanism 4 clamp the metal strip.

[0054] like Figure 1 and Figure 2 As shown, in this embodiment, the cable management device 2 uses multiple limiting wheels 201 divided into two groups, which are staggered from both sides of the horizontal plane and from both sides of the vertical plane along the conveying direction of the metal strip. When the metal strip is conveyed, it is clamped and organized from the horizontal direction and the vertical direction.

[0055] like Figure 1 and Figure 2 As shown, in this embodiment, both the first translation mechanism 6 and the second translation mechanism 7 use a translation drive motor to drive the screw and nut to drive the first bending mechanism 4 and the second bending mechanism 5 to translate left and right. The first translation mechanism 6 and the second translation mechanism 7 each include a translation drive motor 671, a screw 672, a nut (omitted in the figure), a guide rail 673 (two of each are shown in the figure, located on both sides of the screw 672), and a guide block 674 (two of the same number as the guide rail 673 in the figure). The screw 672 is horizontally rotatable on the frame 1 in the left and right direction and is connected to the output shaft of the translation drive motor 671. The nut is correspondingly installed on the lower surface of the first bending mechanism 4 and the second bending mechanism 5 and threadedly connected to the screw 672. The guide block 674 is correspondingly installed on the lower surface of the first bending mechanism 4 and the second bending mechanism 5 and is slidably installed on the guide rail 673.

[0056] like Figures 4 to 7As shown, the midpoint clamping mechanism 8 includes a fixed support 81, a rotary drive mechanism 82, a rotating component 83, a clamping drive mechanism 84, and a clamping component 85. The fixed support 81 includes two support plates 811, with an installation seam 812 formed between the two support plates 811. The rotating component 83 is a large fan-shaped gear structure, with a small fan-shaped section corresponding to the rotating component 83 forming a notched corner 831 that passes through the center. The two sides of the rotating component 83 have protrusions 832 with rounded edges, the center of which is located on the rotation axis of the rotating component 83. The corresponding sides of the support plates 811 have recesses that match the protrusions 832 (omitted in the figure). The protrusions 832 and the recesses can be rotatably fitted so that the rotating component 83 is vertically positioned in the installation seam 812. Both support plates 811 have notches 813 that correspond to the notched corner 831 and face downwards. A swing arm 8 is provided at the notched corner 831. 51. The inner end of the swing arm 851 is oscillatingly connected to the first side 833 of the rotating member 83 and close to the rotation center of the rotating member 83. In this embodiment, the clamping drive mechanism 84 is a clamping drive cylinder. The cylinder body of the clamping drive cylinder 84 is hinged to the outer end of the swing arm 851. The piston rod end of the clamping drive cylinder 84 is fixedly connected to the outer end of the first side 833. The swing arm 851 and the second side 834 of the rotating member 83 together constitute the clamping member 85. When the swing arm 851 and the second side 834 of the rotating member 83 are clamped, the clamping position is on the rotation axis of the rotating member 83. In this embodiment, the rotary drive mechanism 82 includes a rotary servo motor 821 and a transmission gear set (not shown in the figure) mounted on the fixed support 81. The first gear of the transmission gear set is connected to the output shaft of the rotary servo motor 821, and the last gear of the transmission gear set meshes with the rotating member 83.

[0057] Taking the second bending mechanism 5 as an example, such as Figure 8 and Figure 9 As shown, the second bending mechanism 5 includes a translation seat 91, a front baffle 92, an end bending member 93, an end bending drive mechanism 94, a middle bending member 95, and a middle bending drive mechanism 96. The end bending drive mechanism 94 and the middle bending drive mechanism 96 are both mounted on the translation seat 91 and located behind the front baffle 92. The front baffle 92 is provided with an end bending through hole 97 for the end bending member 93 to extend or retract, and a middle bending through hole 98 for the middle bending member 95 to extend or retract. The end bending member 93 is connected to the power output end of the end bending drive mechanism 94 and is located in the end bending through hole 97. The middle bending member 95 is connected to the power output end of the middle bending drive mechanism 96 and is located in the middle bending through hole 98.

[0058] like Figure 9 and Figure 10As shown, the end bending member 93 includes a first base block 931 and a first winding block 932, with the first winding block 932 positioned circumferentially around the first base block 931; the end bending drive mechanism 94 includes a first telescopic mechanism 941 that drives the first base block 931 to extend or retract into the end bending through hole 97, and a first rotation mechanism 942 that drives the first winding block 932 to rotate around the first base block 931; the first telescopic mechanism 941 includes a first cylinder 941, the cylinder body of which is horizontally arranged. The piston rod of cylinder 941 faces horizontally forward, and the first base block 931 is installed at the end of the piston rod of cylinder 941. The first rotating mechanism 942 includes a servo motor 90, a first transmission wheel set 9421 and a first rotating sleeve 9422. The first rotating sleeve 9422 is rotatably sleeved on the piston rod of cylinder 941. The first winding block 932 is disposed on the front end face of the first rotating sleeve 9422. The first rotating sleeve 9422 is connected to the output shaft of servo motor 90 through the first transmission wheel set 9421.

[0059] like Figure 9 , Figure 11 and Figure 12 As shown, the central bending component 95 includes a second base block 951 and at least one second winding block 952 (two blocks in this embodiment), with each second winding block 952 located circumferentially on the second base block 951; the central bending drive mechanism 96 includes a second rotation mechanism 961 that drives each second winding block 952 to rotate around the second base block 951, a third rotation mechanism 962 that drives the second base block 951 to rotate, and a second telescopic mechanism 963 that drives each second winding block 952 to extend or retract into the central bending through hole 98; the front end face of the second base block 951 is provided with a limiting groove 9511 passing through its rotation center; the third rotation mechanism 962 includes a second cylinder 9621, a rocker arm 9622, and a rotating shaft 9623, with the rotating shaft 9623 horizontally arranged in the front-rear direction, the second base block 951 mounted on the front end of the rotating shaft 9623, and the cylinder body of the second cylinder 9621 horizontally arranged; the second cylinder 9621... The piston rod of cylinder 21 is perpendicular to the extension direction of the rotating shaft 9623. One end of the rocker arm 9622 is connected to the rear end of the rotating shaft 9623, and the other end of the rocker arm 9622 is hinged to the piston rod of the second cylinder 9621. The second rotating mechanism 961 includes a servo motor 90, a second transmission wheel set 9611, and a second rotating sleeve 9612. The second rotating sleeve 9612 is rotatably sleeved on the rotating shaft 9623. The second winding block 952 is disposed on the front end face of the second rotating sleeve 9612. The second rotating sleeve 9612 is connected to the output shaft of the servo motor 90 through the second transmission wheel set 9611. The second telescopic mechanism 963 includes a telescopic motor 9631 and a push block 9632. The push block 9632 is mounted on the output shaft of the telescopic motor 9631. The rear part of the second rotating sleeve 9612 is provided with a snap-fit ​​groove 9633 along its circumference. The lower part of the push block 9632 is snap-fitted into the snap-fit ​​groove 9633.

[0060] In this embodiment, to further save space, the first rotating mechanism 942 and the second rotating mechanism 961 are both driven by the same servo motor 90, which in turn drives the first transmission wheel set 9421 and the second transmission wheel set 9611 to rotate.

[0061] The working process of the bending machine of the present invention will be further described below with reference to the accompanying drawings:

[0062] (1) Before bending, the metal strip is first sorted and the rolled metal strip is indirectly unwound. The multiple limiting wheels 201 of the sorting device 2 are divided into two groups. The two adjacent limiting wheels of one group are staggered in the vertical plane along the conveying direction of the metal strip. The two adjacent limiting wheels of the other group are staggered in the horizontal plane along the conveying direction of the metal strip. The metal strip is first clamped and sorted from the top and bottom direction, and then clamped and sorted from the horizontal direction, so that the bent rolled metal strip is sorted into a horizontal state from left to right and then sent into the bending machine. At this time, the first bending mechanism is close to the sorting device 2, and the second bending mechanism is close to the midpoint clamping mechanism 8. The first base block 931 of the first bending mechanism and the second bending mechanism both extend out of the end bending through hole 97. The first winding block 932 rotates to the top of the corresponding first base block 931. The second winding block 952 retracts into the middle bending through hole. The limiting groove 9511 on the second base block 951 rotates to the horizontal state.

[0063] (2) The metal strip is pulled to the right end of the metal strip and passes through the midpoint clamping mechanism 8, specifically:

[0064] (2-1) The right end of the metal strip is clamped by the cutting device 3 installed on the first bending mechanism 4. The first translation mechanism 6 drives the first bending mechanism 4 to move to the right and pull the metal strip to the midpoint clamping mechanism 8. During this period, the metal strip passes between the first winding block 932 and the first base block 931 of the first bending mechanism 4 and then passes through the limiting groove 9511 on the second base block 951 of the first bending mechanism 4.

[0065] (2-2) The cutting device 3 loosens the right end of the metal strip, and the first translation mechanism 6 drives the first bending mechanism 4 to move to the left of the cutting position of the metal strip and re-clamp the metal strip;

[0066] (2-3) The first translation mechanism 6 drives the first bending mechanism 4 to move to the right again, pulling the right end of the metal strip through the midpoint clamping mechanism 8, and the midpoint clamping mechanism 8 clamps the metal strip; the cutting device 3 releases the metal strip.

[0067] (3) Pull the right end of the metal strip to the end bending part 93 of the second bending mechanism 5, and perform end bending operation on the right end of the metal strip, specifically:

[0068] (3-1) The first translation mechanism 6 drives the first bending mechanism 4 to move to the left again, the cutting device 3 clamps the metal strip, and the midpoint clamping mechanism 8 releases the metal strip;

[0069] (3-2) The first translation mechanism 6 drives the first bending mechanism 4 to move to the left again, and the cutting device 3 clamps the metal strip and pulls it to the end of the bending part of the second bending mechanism 5;

[0070] (3-3) The midpoint clamping mechanism 8 clamps the metal strip, and the cutting device 3 releases the metal strip;

[0071] (3-4) The first rotating mechanism 942 of the second bending mechanism 5 drives the first winding block 932 to rotate around the first base block 931, so that the part between the right end of the metal strip and the first base block 931 is bent, thus completing the bending of the right end of the metal strip; after the bending is completed, the right end of the metal strip is sleeved on the first base block 931 of the second bending mechanism 5.

[0072] (4) Cut the metal strip, then pull the metal strip to its midpoint at the midpoint clamping mechanism 8, specifically:

[0073] (4-1) The right end of the metal strip remains sleeved on the first base block 931 of the second bending mechanism 5, the midpoint clamping mechanism 8 releases the metal strip, and the first bending mechanism 4 moves to the left end position of the metal strip.

[0074] (4-2) The midpoint clamping mechanism 8 clamps the metal strip again, causing the cutting device 3 to cut the metal strip;

[0075] (4-3) The midpoint clamping mechanism 8 releases the metal strip, and the second bending device pulls the metal strip to move horizontally so that the midpoint of the metal strip is at the midpoint clamping mechanism 8. The midpoint clamping mechanism 8 clamps the midpoint of the metal strip. At the same time, the first bending mechanism 4 also moves to the corresponding position.

[0076] (5) The metal strip is bent, specifically:

[0077] (5-1) The first rotating mechanism 942 of the first bending mechanism 4 drives the first winding block 932 to rotate around the first base block 931, so that the part between the left end of the metal strip and the first base block 931 is bent, thus completing the bending of the left end of the metal strip; after completion, the first base block 931 of the first bending mechanism 4 and the second bending mechanism 5 are both retracted from the end bending through hole 97.

[0078] (5-2) The first bending mechanism 4 and the second bending mechanism 5 simultaneously move to a mid-bending position between the end of the metal strip and the midpoint. The second winding block 952 of the first bending mechanism 4 and the second bending mechanism 5 extends out. The second rotating mechanism 961 and the third rotating mechanism 962 of the first bending mechanism 4 and the second bending mechanism 5 drive the corresponding second winding block 952 and the second base block 951 to rotate respectively, and perform bending operations on the middle part of the metal wire according to production requirements.

[0079] (5-3) Each time a middle bending operation is performed, the midpoint clamping mechanism 8 drives the metal strip to rotate and adjust the angle so that the metal strip can be in front of the front baffle 92 during the bending process and will not touch other parts of the first bending mechanism 4 and the second bending mechanism 5.

[0080] (5-4) After completing one middle bending operation, the first bending mechanism 4 and the second bending mechanism 5 move to the next middle bending position and repeat steps 5-2 and 5-3 until the metal strip completes all bending operations and is formed.

[0081] (6) The rotating part 83 of the midpoint clamping mechanism 8 rotates until the notched part 831 faces downward, so that the bent metal strip falls naturally from the notched part 831 and the notch 813 of the support plate 811 and leaves the bending machine.

[0082] During steps 2 to 5 above, when the metal strip does not move left or right, the midpoint clamping mechanism 8 keeps clamping the metal strip: throughout the entire bending operation of the metal strip, from the initial feeding of the metal strip, when the metal strip does not move left or right, the midpoint clamping mechanism 8 clamps the metal strip, so that the metal strip remains stable during various operations and avoids deviation.

[0083] During steps 2 to 5, the metal strip passes horizontally through the notched corner 831 of the midpoint clamping mechanism 8. The clamping drive cylinder 84 drives the swing arm 851 to clamp the passing metal strip between the inner end of the swing arm 851 and the inner end of the second side 834 of the rotating member 83, thus clamping the metal strip on the rotation axis of the rotating member 83. Throughout the bending operation, the rotating member 83's two protrusions 832 can rotatably engage with the recesses on the fixed support 81. The rotation drive mechanism 82 drives the rotating member 83 to rotate in the vertical plane according to the bending requirements of the metal strip. The metal strip can rotate with the rotating member 83 while maintaining its midpoint clamped by the clamping member 85. During the horizontal conveying process, the extension direction of the metal strip coincides with the rotation axis of the rotating component 83. When the clamping position of the clamping component 85 is on the rotation axis of the rotating component 83, that is, the midpoint of the metal strip is clamped and fixed on the rotation axis of the rotating component 83 by the clamping component 85. In subsequent bending operations, no matter how the rotating component 83 rotates or how the bending operations on both sides are performed, the midpoint of the metal strip and the two small segments on both sides of the midpoint remain aligned with the rotation axis of the rotating component 83. This prevents offset and improves the stability of the bending operations on both sides, ensuring the quality of the finished product after bending. When the metal strip is bent, the rotating component 83 rotates until the notched corner 831 faces downwards, allowing the bent metal strip to fall naturally from the notched corner 831 and the notch 813 and leave the bending machine.

[0084] During the bending operation of the metal strip end, the end of the metal strip passes between the first base block 931 and the first winding block 932, so that the first base block 931 is on one side of the end of the metal strip. Then, the first rotating sleeve 9422 rotates under the drive of the servo motor 90 and the first transmission wheel set 9421, driving the first winding block 932 to rotate around the first base block 931, so that the part of the metal strip between its end and the first base block 931 is bent into a hook part around the first base block 931. After the end bending of the metal strip is completed, the first telescopic mechanism 941 drives the first base block 931 to retract, so as to avoid the first base block 931 from obstructing the subsequent bending process of the metal strip. The first rotating sleeve 9422 is sleeved on the piston rod of the first cylinder 941. When the first cylinder 941 drives the first base block 931 to extend or retract, it does not hinder the rotation of the first rotating sleeve 9422.

[0085] After the end of the metal strip is bent, the end bending piece 93 retracts, and the first bending mechanism 4 and the second bending mechanism 5 move to the respective middle bending points. The middle bending piece 95 then extends to bend the metal strip at each middle bending point. During bending, the telescopic motor 9631 drives the push block 9632 to extend and retract, causing the second rotating sleeve 9612 to move back and forth along the rotating shaft 9623, thereby causing the second winding block 952 to extend or retract into the middle bending through hole 98. The second cylinder 9621 pushes one end of the swing rod 9622 to swing left and right, causing the other end of the swing rod 9622 to drive the rotating shaft 9623 to rotate slightly, causing the second base block 951 to rotate. The second rotating sleeve 9612 rotates under the drive of the servo motor 90 and the second transmission wheel set 9611, causing each second winding block 952 to rotate around the second base block 951, and bending the middle of the metal wire according to production requirements.

[0086] During the bending operation, the metal strip is positioned in front of the front baffle 92, while the end bending drive mechanism 94 and the middle bending drive mechanism 96 are located behind the front baffle 92. This design makes the entire bending mechanism compact and space-saving, while also ensuring sufficient space in front of the front baffle 92. When the metal strip rotates, the end bending component 93 and the middle bending component 95 extend or retract into the end bending through hole 97 and the middle bending through hole 98 according to the bending requirements. The bent portion will not touch other parts of the bending mechanism, ensuring the stability of the metal strip during the bending process.

[0087] Furthermore, it should be noted that the names of the various parts of the specific embodiments described in this specification may differ. All equivalent or simple variations made to the structure, features, and principles described in this invention are included within the scope of protection of this invention. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this invention or exceed the scope defined in these claims, all of which should fall within the scope of protection of this invention.

Claims

1. A bending machine with stable forming capability, comprising a frame, a first bending mechanism and a second bending mechanism for symmetrically bending metal strips, a first translation mechanism for driving the first bending mechanism to translate left and right, and a second translation mechanism for driving the second bending mechanism to translate left and right, wherein the first translation mechanism and the second translation mechanism are arranged left and right on the frame, the first bending mechanism is mounted on the power output end of the first translation mechanism, and the second bending mechanism is mounted on the power output end of the second translation mechanism, characterized in that: The bending machine also includes a cutting device and a midpoint clamping mechanism. The midpoint clamping mechanism is disposed on the frame and between the first bending mechanism and the second bending mechanism. The cutting device is disposed on the frame and to the left of the first bending mechanism. When a bending machine performs a bending operation, it includes the following steps: Step 1: The metal strip is continuously fed horizontally from left to right to the first bending mechanism. The first bending mechanism clamps the metal strip and pulls it forward, so that the right end of the metal strip passes through the midpoint clamping mechanism and is pulled to the second bending mechanism. Step 2: The second bending mechanism fixes the right end of the metal strip, pulls the middle part of the metal strip past the midpoint clamping mechanism, and the cutting device cuts the metal strip according to the fixed length. The first bending mechanism clamps the left end of the metal strip. Step 3: The first bending mechanism and the second bending mechanism fix the metal strip and convey it horizontally, sending the metal strip to the midpoint of the midpoint clamping mechanism, which clamps the midpoint of the metal strip. Step 4: The first bending mechanism and the second bending mechanism perform symmetrical bending operations on both sides of the midpoint of the metal strip to bend the metal strip into a finished product; Step 5: The midpoint clamping mechanism releases the finished product after the bending operation is completed. The finished product leaves the bending machine. Repeat steps 1 to 4 to perform the next bending operation of the metal strip.

2. The bending machine with stable forming according to claim 1, characterized in that: In steps 1 to 4, when the metal strip does not move left or right, the midpoint clamping mechanism keeps clamping the metal strip.

3. The forming stable bending machine according to claim 1 or 2, characterized in that: The bending machine also includes a wire management device; the wire management device is installed on the frame and is located to the left of the cutting device, and the wire management device arranges the metal strips to be bent into a horizontal state from left to right.

4. The forming stable bending machine according to claim 1 or 2, characterized in that: The midpoint clamping mechanism includes a fixed support, a rotary drive mechanism, a rotating component, a clamping drive mechanism, and a clamping component. The rotary drive mechanism is mounted on the fixed support, and the rotating component is vertically and rotatably mounted on the fixed support and connected to the power output end of the rotary drive mechanism. The clamping component is movably mounted on the rotating component and connected to the power output end of the clamping drive mechanism. The clamping position of the clamping component is located on the rotation axis of the rotating component.

5. The bending machine with stable forming according to claim 4, characterized in that: The rotating component is a large, sheet-like fan shape. A notch is provided at the corresponding small fan shape of the rotating component, which extends through the center. The clamping component and the clamping drive mechanism are both installed in the notch. The two sides of the rotating component have convex parts with rounded edges. The fixed support has a concave part that matches the convex part. The convex part and the concave part can be rotatably engaged. The center of the edge of the convex part is located on the rotation axis of the rotating component.

6. The bending machine with stable forming according to claim 5, characterized in that: A swing arm is provided at the notched corner. The inner end of the swing arm can be swung and connected to the first side of the rotating part and close to the rotation center of the rotating part. The clamping drive mechanism includes a clamping drive cylinder. The cylinder body of the clamping drive cylinder is hinged to the outer end of the swing arm. The piston rod end of the clamping drive cylinder is fixedly connected to the outer end of the first side of the rotating part. The swing arm and the second side of the rotating part together constitute the clamping part.

7. The forming stable bending machine according to claim 1 or 2, characterized in that: Both the first bending mechanism and the second bending mechanism include a translation seat, a front baffle, an end bending member, an end bending drive mechanism, a middle bending member, and a middle bending drive mechanism. The end bending drive mechanism and the middle bending drive mechanism are both mounted on the translation seat and located behind the front baffle. The front baffle is provided with an end bending through hole for the end bending member to extend or retract, and a middle bending through hole for the middle bending member to extend or retract. The end bending member is connected to the power output end of the end bending drive mechanism and is located in the end bending through hole, and the middle bending member is connected to the power output end of the middle bending drive mechanism and is located in the middle bending through hole.

8. The bending machine with stable forming according to claim 7, characterized in that: The end bending member includes a first base block and a first winding block, with the first winding block located in the circumferential direction of the first base block; the end bending drive mechanism includes a first telescopic mechanism that drives the first base block to extend or retract into the end bending through hole, and a first rotation mechanism that drives the first winding block to rotate around the first base block.

9. The bending machine with stable forming according to claim 7, characterized in that: The central bending component includes a second base block and at least one second winding block. Each second winding block is located circumferentially on the second base block. The front side of the second base block is provided with a limiting groove passing through its rotation center. The central bending driving mechanism includes a second rotation mechanism that drives each second winding block to rotate around the second base block, a third rotation mechanism that drives the second base block to rotate, and a second telescopic mechanism that drives each second winding block to extend or retract into the central bending through hole.

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