Furniture frame bending device and method

Abstract

The application relates to the technical field of furniture processing, in particular to a furniture frame bending device and method, which comprises a workbench, a bending device and an extrusion plate are arranged on the workbench, an auxiliary wheel is arranged on the top of the workbench, an auxiliary moving mechanism and a displacement compensation mechanism are further arranged on the workbench, the auxiliary moving mechanism is used for full-length limiting constraint of the furniture frame, and the displacement compensation mechanism is used for offsetting material displacement deviation in the bending process. The furniture frame bending device and method, the folding wing plate of the auxiliary moving mechanism is matched with the rotating wheel, the full-length limiting and uniform compression of the furniture frame are realized, the spring one is matched with the frames with different thicknesses and materials in the elastic action, the displacement caused by single constraint is avoided, the rotating wheel reduces the friction between the frame and the device, effectively prevents the horizontal deviation and surface scratches during the bending, and improves the surface integrity and the reference consistency of the frame processing.

Description

Technical Field

[0001] This invention relates to the field of furniture processing technology, specifically to a furniture frame bending device and method. Background Technology

[0002] As a core component of furniture structure and appearance, the processing precision and efficiency of furniture frames directly determine the assembly stability, aesthetic effect, and service life of the furniture. They are widely used in solid wood furniture, panel furniture, metal frame furniture, and other categories, covering key components such as wardrobe, cabinet, sofa frames, and table and chair frames. As the furniture industry transforms towards customization and high-end products, the market has put forward stringent requirements for the diversity of curvature, consistency of angle, and surface integrity of frame bending. Bending devices have become key equipment in the furniture manufacturing industry chain.

[0003] In the actual operation of existing furniture frame bending devices, the lack of reliability in positioning and fixing the bending material is a prominent problem. The clamping mechanism of the existing device is mostly a single plane pressing or end limiting structure, which lacks uniform constraint on the entire length of the material. Moreover, it does not design an adaptive clamping structure for frame materials of different thicknesses and materials. When bending, the material is prone to slippage or lateral displacement along the length direction under the bending force, which leads to deviation of the bending reference.

[0004] This displacement phenomenon directly affects the processing quality, reducing the accuracy of the bending angle of the furniture frame and making the curvature consistency worse. Additional grinding and adjustment are required during subsequent assembly, which not only increases labor costs and material waste, but also causes defects such as scratches and indentations on the frame surface due to displacement. To address this, we propose a furniture frame bending device and method. Summary of the Invention

[0005] One of the technical problems to be solved in this application is: how to design a furniture frame bending device and method that uses the combined action of full-length limit constraint and real-time displacement compensation mechanism.

[0006] To address the aforementioned technical problems, this application provides a furniture frame bending device and method, including a workbench. The workbench is equipped with a bending device and an extrusion plate. An auxiliary wheel is provided on the top of the workbench. The workbench is also equipped with an auxiliary moving mechanism and a displacement compensation mechanism. The auxiliary moving mechanism is used to limit and constrain the furniture frame along its entire length, and the displacement compensation mechanism is used to offset material displacement deviations during the bending process.

[0007] In some embodiments, the auxiliary moving mechanism includes an L-shaped plate disposed on the top of the workbench, a fixed plate disposed on the L-shaped plate, a screw threadedly connected to the fixed plate, a knob disposed at one end of the screw, and a lifting plate movably disposed at the other end of the screw.

[0008] In some embodiments, the L-shaped plate has a vertical groove and a horizontal groove on its side, the lifting plate is movably disposed inside the vertical groove, a movable rod is slidably disposed in the horizontal groove, and a rotating wheel is rotatably mounted at the end of the movable rod.

[0009] In some embodiments, a connector is provided at the top of the lifting plate, the connector is movably disposed inside the auxiliary wheel, a folding wing plate is sleeved on the outside of the connector, a movable rod is movably disposed on the side of the folding wing plate, a collar is sleeved on the outside of the movable rod, a movable cylinder is movably disposed outside the collar, and the outside of the movable rod is movably disposed inside the movable cylinder.

[0010] In some embodiments, a limiting ring is sleeved on the outer side of both the movable rod and the movable cylinder, and a spring is sleeved on the outer side of both the movable rod and the movable cylinder, with the two ends of the spring respectively disposed at the ends of the two limiting rings.

[0011] In some embodiments, the displacement compensation mechanism includes a contact plate disposed on the side of the extrusion plate, a sleeve disposed on the side of the extrusion plate, a slide rod movably disposed on the inner side of the sleeve, a contact head disposed at the end of the slide rod, and a spring two sleeved on the outer side of the slide rod.

[0012] In some embodiments, a connecting rod is provided on the side of the extrusion plate, a rotating rod is provided at the end of the connecting rod, a connecting cylinder is movably provided at the end and outside of the rotating rod, a cylinder is provided at the end of the connecting cylinder and mounted on the top of the workbench, a pneumatic pressure detection device is provided on the top of the workbench, a double-ended air inlet pipe is provided on the side of the pneumatic pressure detection device, and a flexible hose is provided between the double-ended air inlet pipe and the cylinder.

[0013] In some embodiments, a limiting block is provided between the inner side of the connecting cylinder and the rotating rod, the side of the limiting block is movably disposed on the outer side of the rotating rod, a piston plate is provided on the outer surface of the rotating rod and movably connected to the connecting cylinder, a torsion spring is sleeved on the outer side of the rotating rod and connected to the end of the connecting cylinder, and a flexible hose penetrating the connecting cylinder is provided at the end of the double-ended air inlet pipe.

[0014] This application also provides a method for bending furniture frames, including the following steps:

[0015] S1: Place the furniture frame to be bent on the workbench and make it fit the reference surface of the bending device. Rotate the knob at the end of the screw to drive the lifting plate to move down along the vertical groove of the L-shaped plate until the rotating wheel fits the upper surface of the frame. At the same time, the folding wing plate unfolds under the elastic action of the spring. Through the cooperation of the movable rod and the movable cylinder, the full length limit of both sides of the frame is achieved to avoid lateral deviation during bending.

[0016] S2: Start the bending device. The extrusion plate moves towards the frame to perform the bending operation. If the frame shifts during the bending process, it will trigger the contact head or contact plate of the displacement compensation mechanism. The slide rod slides along the sleeve and compresses the second spring. The air pressure detection device monitors the air pressure changes in the cylinder and connecting cylinder in real time through hose one and hose two. It drives the piston plate to drive the rotating rod to make fine adjustments. The elastic restoring force of the torsion spring is used to offset the displacement deviation.

[0017] S3: After the bending reaches the preset angle, the bending device and the pressing plate reset in the opposite direction. Rotate the knob in the opposite direction, and the lifting plate moves up to release the pressure on the frame. The folding wing plate retracts under the action of spring one, and the rotating wheel reduces the frictional resistance when picking up the part. At this time, spring two and torsion spring of the displacement compensation mechanism drive each component to reset, and the bent furniture frame can be taken out to complete a single operation.

[0018] This invention has at least the following beneficial effects:

[0019] 1. This device uses the folding wing plate of the auxiliary moving mechanism and the rotating wheel to achieve full-length limiting and uniform pressing of the furniture frame. The elasticity of the spring adapts to frames of different thicknesses and materials, avoiding displacement caused by single constraint. The rotating wheel reduces the friction between the frame and the device, effectively preventing lateral displacement and surface scratches during bending, and improving the surface integrity and benchmark consistency of the frame processing.

[0020] 2. The displacement compensation mechanism uses air pressure detection equipment to sense the frame displacement in real time. Through the coordinated action of cylinder, piston plate and torsion spring, dynamic fine adjustment is achieved. Spring 2 further enhances the compensation flexibility, offsets the slippage deviation caused by bending force, and can ensure the bending angle accuracy without manual intervention, reduce subsequent grinding process, reduce labor and material costs, and meet the strict requirements of customized production for angle consistency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the extrusion plate, auxiliary wheel, and cylinder of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the cylinder, extrusion plate, contact plate and contact head of the present invention;

[0024] Figure 4 for Figure 3 A magnified structural diagram at point A;

[0025] Figure 5 This is an exploded structural diagram of the second type of hose, the connecting cylinder, and the rotating rod of the present invention;

[0026] Figure 6This is a schematic diagram of the structure of the rotating wheel, auxiliary wheel, and L-shaped plate of the present invention;

[0027] Figure 7 This is a schematic diagram of the rotating wheel, auxiliary wheel, moving rod, and connector of the present invention.

[0028] In the diagram: 1. Workbench; 2. Bending device; 3. Extrusion plate; 4. Auxiliary wheel; 5. Auxiliary moving mechanism; 51. L-shaped plate; 52. Lifting plate; 53. Knob; 54. Screw; 55. Fixed plate; 56. Vertical groove; 57. Horizontal groove; 58. Moving rod; 59. Rotating wheel; 510. Folding wing plate; 511. Collar; 512. Connector; 513. Movable rod; 514. Movable cylinder; 515. Limiting ring; 516, Spring 1; 6, Displacement compensation mechanism; 61, Air pressure detection equipment; 62, Cylinder; 63, Double-ended air inlet pipe; 64, Hose 1; 65, Contact plate; 66, Hose 2; 67, Connecting cylinder; 68, Contact head; 69, Sleeve; 610, Slide rod; 611, Spring 2; 612, Connecting rod; 613, Torsion spring; 614, Limiting block; 615, Piston plate; 616, Rotating rod. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1: Please refer to Figure 1-7 The present invention provides a technical solution: a furniture frame bending device, including a workbench 1, a bending device 2 and an extrusion plate 3 on the workbench 1, an auxiliary wheel 4 on the top of the workbench 1, an auxiliary moving mechanism 5 and a displacement compensation mechanism 6 on the workbench 1, the auxiliary moving mechanism 5 is used to limit and constrain the furniture frame along its entire length, and the displacement compensation mechanism 6 is used to offset the material displacement deviation during the bending process.

[0031] The auxiliary moving mechanism 5 includes an L-shaped plate 51 set on the top of the workbench 1. A fixed plate 55 is set on the L-shaped plate 51. A screw 54 is threadedly connected to the fixed plate 55. A knob 53 is provided at one end of the screw 54. A lifting plate 52 is movably set at the other end of the screw 54. The fixed plate 55 is vertically fixed on the horizontal section of the L-shaped plate 51. A threaded hole is opened in the middle of the fixed plate 55. The screw 54 is threadedly connected to the vertically set screw 54. A knob 53 for easy operation is welded to the top of the screw 54. The bottom end of the screw 54 is movably connected to the lifting plate 52 through a bearing. Rotating the knob 53 can drive the lifting plate 52 to rise and fall in the vertical direction.

[0032] The L-shaped plate 51 has a vertical groove 56 and a horizontal groove 57 on its side. The lifting plate 52 is movably disposed inside the vertical groove 56. A moving rod 58 is slidably disposed in the horizontal groove 57. A rotating wheel 59 is rotatably mounted at the end of the moving rod 58. The vertical side of the L-shaped plate 51 has a through vertical groove 56 and several horizontally distributed horizontal grooves 57 along its length. The vertical groove 56 is adapted to the lifting plate 52. The lifting plate 52 is slidably embedded in the vertical groove 56 to achieve guidance and limitation. A horizontally disposed moving rod 58 is slidably disposed in the horizontal groove 57. A rotating wheel 59 is rotatably mounted at the end of the moving rod 58 near the frame through a rotating shaft. The outer surface of the rotating wheel 59 is covered with a wear-resistant silicone layer.

[0033] A connector 512 is provided on the top of the lifting plate 52. The connector 512 is movably disposed inside the auxiliary wheel 4. A folding wing plate 510 is sleeved on the outside of the connector 512. A movable rod 513 is movably disposed on the side of the folding wing plate 510. A collar 511 is sleeved on the outside of the moving rod 58. A movable cylinder 514 is movably disposed on the outside of the collar 511. The outside of the movable rod 513 is movably disposed inside the movable cylinder 514. The connector 512 is movably disposed in the inner bearing of the auxiliary wheel 4 to realize the rotation support of the auxiliary wheel 4. A foldable folding wing plate 510 is sleeved on the outside of the connector 512. The movable rod 513 is movably connected to the side of the folding wing plate 510 through a pin. A collar 511 is fixedly sleeved on the outside of the moving rod 58. A movable cylinder 514 is movably sleeved on the outside of the collar 511. The end of the movable rod 513 away from the folding wing plate 510 is slidably inserted into the inside of the movable cylinder 514.

[0034] Both the movable rod 513 and the movable cylinder 514 are fitted with limiting rings 515 on their outer sides. Both the movable rod 513 and the movable cylinder 514 are fitted with springs 516. The two ends of springs 516 are respectively located at the ends of the two limiting rings 515. The two limiting rings 515 are located on both sides of the connection between the movable rod 513 and the movable cylinder 514. Springs 516 are fitted on the outer sides of the movable rod 513 and the movable cylinder 514. When the springs 516 are in their natural state, they are slightly stretched. Both ends of the springs 516 are tightly abutted against the opposite end faces of the two limiting rings 515, providing elastic support for the folding wing plate 510.

[0035] Example 2: Please refer to Figure 6-7 The present invention provides a technical solution: the displacement compensation mechanism 6 includes a contact plate 65 disposed on the side of the extrusion plate 3, a sleeve 69 disposed on the side of the extrusion plate 3, a slide rod 610 movably disposed on the inner side of the sleeve 69, a contact head 68 disposed at the end of the slide rod 610, a spring 611 sleeved on the outer side of the slide rod 610, a horizontally disposed sleeve 69 fixed on the side of the extrusion plate 3, the slide rod 610 slidably assembled on the inner side of the sleeve 69, and a contact head 68 fixedly installed at the end of the slide rod 610 away from the sleeve 69, the contact head 68 being adapted to the side of the frame.

[0036] A connecting rod 612 is provided on the side of the extrusion plate 3. A rotating rod 616 is provided at the end of the connecting rod 612. A connecting cylinder 67 is movably provided at the end and outside of the rotating rod 616. A cylinder 62 is provided at the end of the connecting cylinder 67 and installed on the top of the workbench 1. A pneumatic pressure detection device 61 is provided on the top of the workbench 1. A double-ended air inlet pipe 63 is provided on the side of the pneumatic pressure detection device 61. A flexible hose 64 is provided between the double-ended air inlet pipe 63 and the cylinder 62.

[0037] The end of the connecting rod 612 away from the extrusion plate 3 is connected to a rotating rod 616 via a universal joint. The end and outer side of the rotating rod 616 are movably fitted with a sealed connecting sleeve 67. The end of the connecting sleeve 67 away from the rotating rod 616 is connected to the output end of the cylinder 62 fixed on the top of the workbench 1. A pneumatic pressure detection device 61 is also fixed on the top of the workbench 1, and a double-ended air inlet pipe 63 is connected to its side. The double-ended air inlet pipe 63 is connected to the cylinder 62 via a hose 64.

[0038] A limiting block 614 is provided between the inner side of the connecting cylinder 67 and the rotating rod 616. The side of the limiting block 614 is movably disposed on the outer side of the rotating rod 616. A piston plate 615 is provided on the outer surface of the rotating rod 616 and is movably connected to the connecting cylinder 67. A torsion spring 613 connected to the end of the connecting cylinder 67 is sleeved on the outer side of the rotating rod 616. A flexible hose 66 that penetrates the connecting cylinder 67 is provided at the end of the double-ended air inlet pipe 63.

[0039] The limiting block 614 is fixed to the inner wall of the connecting cylinder 67, and its side slides against the outer side of the rotating rod 616 to achieve limiting. The outer surface of the rotating rod 616 is fixedly fitted with a piston plate 615 that is in sealing and sliding cooperation with the inner wall of the connecting cylinder 67. A torsion spring 613 is fitted on the outer side of the rotating rod 616. The two ends of the torsion spring 613 are respectively connected to the end of the connecting cylinder 67 and the piston plate 615. The double-ended air inlet pipe 63 passes through the side wall of the connecting cylinder 67 through the second flexible hose 66 and communicates with the inside of the connecting cylinder 67.

[0040] This application also provides a method for bending furniture frames, including the following steps:

[0041] S1: Place the furniture frame to be bent on the workbench 1 so that it fits against the reference surface of the bending device 2. Rotate the knob 53 at the end of the screw 54 to drive the lifting plate 52 to move down along the vertical groove 56 of the L-shaped plate 51 until the rotating wheel 59 fits against the upper surface of the frame. At the same time, the folding wing plate 510 unfolds under the elastic action of the spring 516. Through the cooperation of the movable rod 513 and the movable cylinder 514, the full length limit of both sides of the frame is achieved to avoid lateral displacement during bending.

[0042] S2: Start the bending device 2, and the extrusion plate 3 moves towards the frame to perform the bending operation. If the frame is displaced during the bending process, it will trigger the contact head 68 or contact plate 65 of the displacement compensation mechanism 6. The slide rod 610 slides along the sleeve 69 and compresses the second spring 611. The air pressure detection device 61 monitors the air pressure changes in the cylinder 62 and the connecting cylinder 67 in real time through the first hose 64 and the second hose 66. It drives the piston plate 615 to drive the rotating rod 616 to make fine adjustments. The elastic restoring force of the torsion spring 613 is used to offset the displacement deviation.

[0043] S3: After the bending reaches the preset angle, the bending device 2 and the pressing plate 3 reset in the opposite direction. The knob 53 is rotated in the opposite direction, the lifting plate 52 moves up to release the pressure on the frame, the folding wing plate 510 is closed under the action of spring 516, and the rotating wheel 59 reduces the frictional resistance when picking up the part. At this time, the spring 611 and torsion spring 613 of the displacement compensation mechanism 6 drive each component to reset, and the bent furniture frame can be taken out to complete the single operation.

[0044] Working principle: First, place the furniture frame to be bent stably on the surface of the workbench 1, ensuring that one side of the frame is tightly against the reference surface of the bending device 2 to ensure accurate bending reference. Then, rotate the knob 53 at the end of the screw 54. Utilizing the threaded engagement between the screw 54 and the fixing plate 55, the lifting plate 52 is driven to move vertically downward along the vertical groove 56 of the L-shaped plate 51 until the rotating wheel 59 at the end of the moving rod 58 is completely in contact with the upper surface of the frame, forming a longitudinal pressing force. At the same time, the folding wing plate 510 automatically unfolds under the elastic tension of the spring 516. Through the sliding engagement between the moving rod 513 and the moving cylinder 514, the rotating wheel 59 is driven to move along the horizontal groove 57 towards both sides of the frame, achieving lateral limit constraint on the entire length of the frame and effectively preventing lateral deviation during the bending process.

[0045] Next, the bending device 2 is activated, driving the extrusion plate 3 to move smoothly along the workbench 1 towards the furniture frame. Bending force is gradually applied to deform the frame along the forming surface of the bending device 2. During the bending process, if the frame slips or shifts laterally along its length due to the bending force, it will directly trigger the contact head 68 or contact plate 65 of the displacement compensation mechanism 6. After being pressed, the contact head 68 pushes the slide rod 610 to slide inward along the sleeve 69 and compresses the second spring 611. At the same time, the air pressure detection device 61 monitors the air pressure changes in the cylinder 62 and the connecting cylinder 67 in real time through the first hose 64 and the second hose 66, accurately sensing the displacement amplitude. Subsequently, the cylinder 62 drives the piston plate 615 in the connecting cylinder 67 to drive the rotating rod 616 to make a slight angle adjustment. With the elastic restoring force of the torsion spring 613, a reverse compensation force is applied to the frame to offset the displacement deviation in real time and ensure the consistency of the bending angle and curvature.

[0046] Finally, when the frame bend reaches the preset angle, the bending device 2 stops operating and resets synchronously with the extrusion plate 3 in the opposite direction. The knob 53 is rotated in the opposite direction, and the screw 54 drives the lifting plate 52 to move upward along the vertical groove 56. The rotating wheel 59 disengages from the upper surface of the frame, releasing the longitudinal pressure. The folding wing plate 510 retracts under the reset action of the spring 516, reducing interference when picking up the part. At the same time, the spring 611 in the displacement compensation mechanism 6 pushes the slide bar 610 to reset, and the torsion spring 613 drives the rotating rod 616 and the piston plate 615 back to their initial positions. All components complete the reset action.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A furniture frame bending device, comprising a workbench (1), characterized in that: The workbench (1) is provided with a bending device (2) and an extrusion plate (3). The top of the workbench (1) is provided with an auxiliary wheel (4). The workbench (1) is also provided with an auxiliary moving mechanism (5) and a displacement compensation mechanism (6). The auxiliary moving mechanism (5) is used to limit the furniture frame along its entire length. The displacement compensation mechanism (6) is used to offset the material displacement deviation during the bending process. The displacement compensation mechanism (6) includes a contact plate (65) disposed on the side of the extrusion plate (3), a sleeve (69) disposed on the side of the extrusion plate (3), a slide rod (610) movably disposed on the inner side of the sleeve (69), a contact head (68) disposed at the end of the slide rod (610), and a spring (611) sleeved on the outer side of the slide rod (610). A connecting rod (612) is provided on the side of the extrusion plate (3), and a rotating rod (616) is provided at the end of the connecting rod (612). A connecting cylinder (67) is movably provided at the end and outside of the rotating rod (616). A cylinder (62) is provided at the end of the connecting cylinder (67) and installed on the top of the workbench (1). A pneumatic pressure detection device (61) is provided on the top of the workbench (1). A double-ended air inlet pipe (63) is provided on the side of the pneumatic pressure detection device (61). A flexible hose (64) is provided between the double-ended air inlet pipe (63) and the cylinder (62). A limiting block (614) is provided between the inner side of the connecting cylinder (67) and the rotating rod (616). The side of the limiting block (614) is movably disposed on the outer side of the rotating rod (616). A piston plate (615) is provided on the outer surface of the rotating rod (616) and is movably connected to the connecting cylinder (67). A torsion spring (613) connected to the end of the connecting cylinder (67) is sleeved on the outer side of the rotating rod (616). A flexible hose (66) penetrating the connecting cylinder (67) is provided at the end of the double-ended air inlet pipe (63).

2. The furniture frame bending device according to claim 1, characterized in that: The auxiliary moving mechanism (5) includes an L-shaped plate (51) set on the top of the workbench (1), a fixed plate (55) is set on the L-shaped plate (51), a screw (54) is threadedly connected to the fixed plate (55), a knob (53) is provided at one end of the screw (54), and a lifting plate (52) is movably set at the other end of the screw (54).

3. The furniture frame bending device according to claim 2, characterized in that: The L-shaped plate (51) has a vertical groove (56) and a horizontal groove (57) on its side. The lifting plate (52) is movably disposed inside the vertical groove (56). A moving rod (58) is slidably disposed inside the horizontal groove (57). A rotating wheel (59) is rotatably installed at the end of the moving rod (58).

4. The furniture frame bending device according to claim 3, characterized in that: The top of the lifting plate (52) is provided with a connector (512), which is movably disposed inside the auxiliary wheel (4). A folding wing plate (510) is sleeved on the outside of the connector (512). A movable rod (513) is movably disposed on the side of the folding wing plate (510). A collar (511) is sleeved on the outside of the movable rod (58). A movable cylinder (514) is movably disposed on the outside of the collar (511). The outside of the movable rod (513) is movably disposed inside the movable cylinder (514).

5. The furniture frame bending device according to claim 4, characterized in that: The movable rod (513) and the movable cylinder (514) are both fitted with limiting rings (515), and the movable rod (513) and the movable cylinder (514) are fitted with springs (516), with the two ends of springs (516) respectively located at the ends of the two limiting rings (515).

6. A method for bending furniture frames, applicable to the furniture frame bending device described in claim 5, characterized in that, Includes the following steps: S1: Place the furniture frame to be bent on the workbench (1) so that it fits against the reference surface of the bending device (2). Rotate the knob (53) at the end of the screw (54) to drive the lifting plate (52) to move down along the vertical groove (56) of the L-shaped plate (51) until the rotating wheel (59) fits against the upper surface of the frame. At the same time, the folding wing plate (510) unfolds under the elastic action of the spring (516). Through the cooperation of the movable rod (513) and the movable cylinder (514), the full length limit of both sides of the frame is achieved to avoid lateral displacement during bending. S2: Start the bending device (2), the extrusion plate (3) moves towards the frame to perform bending operation. If the frame is displaced during the bending process, the contact head (68) or contact plate (65) of the displacement compensation mechanism (6) will be triggered. The slide rod (610) slides along the sleeve (69) and compresses the second spring (611). The air pressure detection device (61) monitors the air pressure change in the cylinder (62) and connecting cylinder (67) in real time through the first hose (64) and the second hose (66), drives the piston plate (615) to drive the rotating rod (616) to make fine adjustments, and the elastic restoring force of the torsion spring (613) offsets the displacement deviation. S3: After the bending reaches the preset angle, the bending device (2) and the pressing plate (3) are reset in the opposite direction. The knob (53) is rotated in the opposite direction, the lifting plate (52) moves up to release the pressure on the frame, the folding wing plate (510) is closed under the action of spring one (516), and the rotating wheel (59) reduces the frictional resistance when picking up the part. At this time, the spring two (611) and torsion spring (613) of the displacement compensation mechanism (6) drive each component to reset, and the bent furniture frame can be taken out to complete the single operation.

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