A continuous bending forming method for cabinet body plates

Abstract

The present application relates to a cabinet body plate continuous bending forming method, belongs to the metal plate bending processing technical field, first the first to last arrangement each bending line is processed into the positioning bending edge which can be reserved and passed through the bending station, then the last positioning bending edge is taken as the starting point along the original feeding path reverse feeding, and according to the last to first order, the final bending is made, the side to be finally folded keeps the pre-folding state which can pass through the material, and the side which has been folded gradually moves away from the bending station with feeding, so that the formed product bending edge formed first can avoid hindering the subsequent bending line passing through the station; at the same time, each positioning bending edge serves as the entity positioning basis when reverse feeding, and the plate is kept without turning over and with the same positioning edge abutting against the same feeding reference surface during the whole bending process, thereby reducing the position deviation caused by exiting, turning over, turning and re-establishing the positioning relationship, so that multiple parallel bending lines can be continuously formed in the same bending station.

Description

Technical Field

[0001] This invention belongs to the field of metal sheet bending technology, specifically relating to a method for continuous bending and forming of cabinet panels. Background Technology

[0002] Cabinet doors, side panels, and enclosure panels are typically formed by bending a single unfolded metal sheet. During processing, multiple parallel bending lines are first determined on the unfolded sheet based on the finished cabinet outline. Then, one straight edge of the sheet is placed against the feeding reference, allowing each bending line to sequentially enter the bending station. Current operations generally involve bending the sheet directly to the finished angle after the first bending line is in place, then moving the sheet to allow the next bending line to enter the bending station and bending it again to the finished angle, thus completing all bending lines. When adjacent bending lines have different bending directions, the sheet needs to be flipped, rotated, or repositioned.

[0003] Before bending, the sheet metal is nearly flat and can move smoothly within the limited material passage space between the bending die and the machine frame. After the first bending line is bent directly to the finished angle, the sheet metal section on one side will leave the original plane, forming an upward or downward protruding finished edge. When processing the next bending line, the already formed finished edge must move with the entire sheet metal, while the passage space between the bending die, the machine frame, and the material support position does not change with the shape of the sheet metal. As finished edges increase, the outer contour of the sheet metal will gradually increase or shrink inward. The first formed edge is prone to hitting the bending die or the machine frame, preventing the subsequent bending lines from entering the bending position; even if there is no complete collision, the protruding edge can easily cause the sheet metal to tilt or lose stable support, causing the positioning edge that was originally close to the feeding reference to shift. The worker can only remove the sheet metal, flip it over, turn it, lift it, and find the bending line again. Each time it is repositioned, the positional relationship between the sheet metal and the bending station must be re-established. The multiple formed edges further increase the difficulty of operation and alignment. Therefore, existing processes cannot achieve the goal of having multiple bending lines continuously enter the same bending station without flipping the parts and maintaining the same positioning reference, while also avoiding the problem of pre-formed finished edge obstructing the passage of the sheet and repeatedly re-aligning the bending position. Summary of the Invention

[0004] To address the aforementioned problems in the prior art, this invention provides a continuous bending forming method for cabinet panels. This method solves the problem that when a cabinet panel has multiple parallel bending lines, the first formed finished edge hinders subsequent material feeding and forces the panel to repeatedly flip, change positioning references, and realign, making it difficult for each bending line to be continuously formed under the same positioning reference.

[0005] The objective of this invention can be achieved through the following technical solutions: A method for continuous bending and forming of cabinet panels includes the following steps: S1. According to the finished product outline, determine the multiple parallel bending lines arranged from the beginning to the end along the feeding direction on the unfolded plate, the inner included angle of each line and the bending direction, and take the straight feeding edge of one side of the plate as the positioning edge. S2. Keep the sheet metal from flipping over and ensure the positioning edges remain against the same feeding reference surface. Feed the sheet metal from beginning to end in a forward direction, allowing each bending line to enter the same bending station sequentially. After each line is in place, pre-bend only along the corresponding direction to form a positioning crease with an inner angle greater than the corresponding finished product's inner angle, which is retained after pressure release. Ensure that the sheet metal after each pre-bend, along with all previous positioning creases, can continue to pass through the bending station. After the last positioning crease is formed, do not move it out of the bending station; instead, bend it directly to the finished product's inner angle. Then, follow the original feeding path. The feed is reversed so that the positioning edges that have not yet been fully bent return sequentially from the end to the beginning. The final bending occurs when the positioning edge coincides with the bending reference line of the bending station. When feeding in reverse, the current positioning edge in the station is the boundary. All positioning edges on the last side are in a fully bent state and move away from the station as the feed is carried out. All positioning edges on the first side are in a pre-bent state that can pass through the station. Only after the current positioning edge is fully bent does the adjacent positioning edge on the first side return until the first positioning edge is fully bent. S3. Remove the cabinet panels that have been bent.

[0006] As a further aspect of the present invention, before formal processing, a test plate of the same material and thickness is used to gradually increase the pre-bending amount along the same bending line and bending direction as the plate. The minimum pre-bending amount is taken to ensure that the positioning creases can be retained after the pressure is released and that the test plate can still move back and forth to the bending station after all the positioning creases are formed.

[0007] As a further aspect of the present invention, with the plane where the unfolded plate is located as a reference, the bending line with the bending direction upward is applied by the lower side of the plate, and the bending line with the bending direction downward is applied by the upper side of the plate, keeping the plate from flipping over when changing the side of application of force.

[0008] As a further aspect of the present invention, during reverse feeding, the feeding is stopped after both ends of the positioning fold to be finally folded coincide with the bending reference line, and the final fold position is determined separately by the positioning fold.

[0009] As a further aspect of the present invention, during the final folding, the inner angle after pressure relief is first pressed until it is greater than the inner angle of the finished product. The positioning folding edge is kept in the work position and inspected with a corner sample whose inner angle is equal to the inner angle of the finished product. Then, the folding is repeated in the same direction until both side plate areas are in contact with the corner sample.

[0010] As a further aspect of the present invention, the stopping position of the bending die when each positioning fold edge of the first piece is in contact with the corner sample is recorded, and the corresponding positioning fold edges of subsequent plates of the same batch, material and thickness are first bent to the recorded stopping position.

[0011] As a further aspect of the present invention, during forward feeding, the un-pre-folded plate area on the last strip side of the bending station is supported, and during reverse feeding, the pre-folded plate area on the first strip side of the currently positioned folding edge is supported, so that it is close to the feeding plane of the station before the plate enters the station.

[0012] As a further aspect of the present invention, before each pre-bending or final bending, the plate is pressed on the inner side of a straight section adjacent to the bending station and located outside the station; after the bending die leaves the plate, the pressing is released, and then the plate is moved along the feeding reference surface.

[0013] As a further aspect of the present invention, after the current positioning fold is finally folded, the first side pre-folded plate area is supported while the last side already folded plate area is supported, so that the two supporting positions move synchronously in the opposite direction with the plate until the previous positioning fold is in place.

[0014] As a further aspect of the present invention, when the finished edge of the first or last folded piece blocks the original feeding path, the positioning edge is disengaged from the feeding reference surface, and the plate is pulled out in a direction parallel to the bending line.

[0015] The beneficial effects of this invention are as follows: This invention first processes each bending line arranged from beginning to end into positioning folds that can both be retained and pass through the bending station. Then, starting from the last positioning fold, the material is fed in reverse along the original feeding path, and each bending line is completed in order from end to beginning. This ensures that the side to be completed is always in a pre-folded state that allows material to pass through, while the side that has been completed is gradually moved away from the bending station as the material is fed. This avoids the pre-formed finished edge from hindering the subsequent bending lines from passing through the station. At the same time, each positioning fold also serves as the physical alignment reference during reverse feeding. Throughout the bending process, the panel is kept from flipping over, and the same positioning edge is kept against the same feeding reference surface. This reduces positional offsets caused by exiting, flipping, turning, and re-establishing positioning relationships, allowing multiple parallel bending lines to be continuously formed at the same bending station. This solves the problem that when cabinet panels have multiple parallel bending lines, the pre-formed finished edge hinders subsequent feeding and forces the panel to repeatedly flip over, change the positioning reference, and re-align, making it difficult for each bending line to be continuously formed under the same positioning reference. Attached Figure Description

[0016] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a flowchart of the continuous bending forming method for cabinet panels according to the present invention. Detailed Implementation

[0018] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0019] Before implementation, the parallel bending lines are designated as the first to the last, according to the order in which they enter the bending station during forward feeding. Using the current bending line or positioning crease as the boundary, the side facing the first bending line is designated as the first bending side, and the side facing the last bending line is designated as the last bending side. The plane where the unfolded sheet is located is the initial plane before processing. The sheet is not flipped, meaning that the initial upper and lower surfaces are not interchanged during forward pre-bending and reverse final bending. The number of each bending line, the inner angle of the finished product, and the bending direction are marked on the sheet or the corresponding process card.

[0020] The positioning edge must always be against the same feeding reference surface. This means that from the first pre-fold to the completion of the first final fold, the same straight edge is always used for feeding, ensuring that the straight segment outside the workstation and adjacent to the current bending position is in contact with the reference surface. This does not apply to the final unloading. The positioning crease is a crease that remains continuously identifiable after the pre-fold pressure is released and whose ends can be aligned. Before each application of force, feeding is stopped and the bending line or positioning crease is aligned with the bending reference line. After applying force, unloading is performed first, and the mold is moved aside. Feeding continues only if the crease is retained and the sheet reaches the next position without being blocked by the mold or frame. The internal angle of the finished product is judged based on the state after pressure release. The feeding plane is the plane supported by the worktable or support component before the sheet first enters the workstation. When supporting, only the flat plate area near the workstation needs to be returned to this plane.

[0021] Please see Figure 1 As shown, this embodiment provides a method for continuous bending forming of cabinet panels, including the following steps: S1, according to the finished product outline, determine multiple parallel bending lines arranged from the beginning to the end along the feeding direction on the unfolded panel, the inner included angle of each line and the bending direction, with the straight feeding edge of one side of the panel as the positioning edge; S2, keeping the panel without flipping over and the positioning edge always abutting the same feeding reference surface, feeding from the beginning to the end in a forward direction, so that each bending line enters the same bending station in sequence; after each line is in place, only pre-bend along the corresponding direction to form a positioning crease with an inner included angle greater than the corresponding finished product inner included angle and retained after pressure relief, and so that the panel after each pre-bend, together with the previous positioning creases, can continue to be bent. After the last positioning fold is formed, it is not moved out of the bending station, but directly bent to the inner corner of the finished product; then it is fed in reverse along the original feeding path, so that the positioning folds in the same group that have not yet been bent return from the end to the beginning in sequence, and are bent after the positioning folds coincide with the bending reference line of the bending station; when feeding in reverse, the current positioning fold in the station is the boundary, and the positioning folds on the last side are all in the bent state and move away from the station with the feeding, while the positioning folds on the first side are in the pre-bent state that can pass through the station; after the current positioning fold is bent, the adjacent positioning fold on the first side returns until the first positioning fold is bent; S3, remove the bent cabinet panel.

[0022] The above process first uses a forward pre-fold to form a positioning fold that can be retained and allows material to pass through, so that when the sheet enters the station via the subsequent bending line, multiple finished edges occupying a large space have not yet formed. The last positioning fold remains at the station for final folding, and then returns in reverse from the last to the first. During the reverse process, the last side that has been folded moves away from the station with the material being fed, while the first side that is yet to be folded still passes through the station in a pre-folded state, thus avoiding the need for the already formed finished edges to pass through the confined space again. Each positioning fold also serves as a return alignment position, allowing the same positioning edge and the same feeding reference to be used continuously.

[0023] The design intent of this sequence is to simultaneously preserve the sheet metal's passability and provide a basis for reverse alignment. If the final fold is performed directly in the forward stage, the pre-formed finished edge will obstruct subsequent feeding; if the fold is not retained after pre-folding, there is no physical position for alignment in the reverse stage; if the final fold is not performed from the last strip to the first strip, the already formed finished edge may still re-enter the station. Therefore, the pre-folding state must simultaneously satisfy the requirement that the fold is identifiable after pressure relief and that material can still pass through after cumulative pre-folding, with the last strip serving as the connection point between the forward and reverse stages. Workers operate according to the bending line number, unloading and then feeding material each time, thus completing the sequence transition based on the observable state. As a result, this method allows multiple parallel bending lines to continuously enter the same station without flipping the sheet metal and continuously using the same positioning reference; the pre-folding state prevents the finished edge from obstructing material passing too early, and the positioning fold provides a basis for alignment in the reverse final fold, thereby reducing the processes of exiting, flipping, turning, and re-aligning.

[0024] First, during the basic process, the pre-bending amount determines whether the creases can be retained and whether the sheet can continue to be processed. Too little pre-bending will cause the sheet to flatten after pressure relief, while too much will cause the sheet contour to rise or shrink prematurely. To determine an executable pre-bending starting point, in one embodiment, before formal processing, a test sheet of the same material and thickness is used, with the same bending line and direction as the sheet, and the pre-bending amount is gradually increased. The minimum pre-bending amount is taken where the positioning creases can be retained after pressure relief and the test sheet can still move back and forth to the bending station after forming all the positioning creases. During operation, the first mold stop position that simultaneously meets both of the above conditions in the step-by-step trial bending is taken as the formal processing value, allowing the worker to complete the calibration without calculating the theoretical minimum value; recalibration is required when the material, thickness, or bending arrangement changes.

[0025] After determining the pre-bending amount, different bending lines may need to bend upwards and downwards from the initial board surface, respectively. If force is always applied from the same side, the board needs to be flipped and the reference re-established. To maintain the original positioning relationship, in one embodiment, with the plane where the unfolded board is located as the reference, bending lines with the bending direction upwards are applied from the lower side of the board, and bending lines with the bending direction downwards are applied from the upper side of the board. When changing the force application side, the board is kept from flipping. The bending station used can select to apply force from the upper or lower side of the board at the same bending reference line; during implementation, the force application side is selected according to the direction marking on the process card, and the non-working force application part is removed from the feeding and board area rotation range, thereby completing the direction switching without changing the orientation of the board.

[0026] In practice, the bending station has a force-applying part that can exit the feeding range and a supporting part that cooperates with it on the upper and lower sides of the same bending reference line. When bending upwards, the lower force-applying part pushes the corresponding plate area upwards, while the upper supporting part restricts the plate area on the other side; when bending downwards, the upper force-applying part pushes the corresponding plate area downwards, while the lower supporting part restricts the plate area on the other side. After each bend, the force is released first, so that the force-applying part and the supporting part exit the feeding and rotation range of the plate, and then the next feeding is performed.

[0027] When entering the reverse feeding stage, the positioning crease formed by the shallow bend may have one end in place while the other end deviates due to the deflection of the sheet metal. Direct final bend will cause the forming position to tilt. To avoid this deviation, in one embodiment, during reverse feeding, the feeding is stopped after both ends of the positioning crease to be finalized coincide with the bending reference line, and the final bend position is determined solely by this positioning crease. The worker observes both ends of the crease. If only one end is in place, the worker retreats and re-aligns it with the positioning edge, without using adjacent creases or accumulated feeding distance to calculate the current position, thereby preventing the transmission of the previous feeding error to the next bending position.

[0028] After the positioning fold is aligned, the metal plate will spring back when the pressure is released. If it is pressed directly to the estimated position in one go, the inner angle of the finished product after pressure release may still be too large. To leave room for on-site correction, in one embodiment, during the final fold, it is first pressed until the inner angle after pressure release is greater than the inner angle of the finished product. The positioning fold is kept in the work position and checked with a corner sample whose inner angle is equal to the inner angle of the finished product. Then, it is folded again in the same direction until both sides of the plate area are in contact with the corner sample. The endpoint is when both inspection surfaces of the corner sample are in contact. If they are not in contact, after unloading, it is folded again in the original direction. Workers can directly judge whether it is completed by the contact state, avoiding the use of reverse shaping.

[0029] After the first piece angle correction is completed, if the same batch of panels are still being trial-bent one by one starting with small bends, the adjustment process already completed for the first piece will be repeated. To reuse the results of the first piece, in one embodiment, the stopping position of the bending die when each positioning fold edge of the first piece aligns with the corner sample is recorded. The corresponding positioning fold edges of subsequent panels of the same batch, material, and thickness are first bent to the recorded stopping position. During implementation, the recorded position is made to correspond one-to-one with the bending line number. Subsequent panels are unloaded after reaching the recorded position and checked with the corner sample. When the material, thickness, or die state changes, the calibration is re-established, thus balancing batch efficiency and physical completion criteria.

[0030] During batch reciprocating feeding, the overhanging plate area will sag due to its own weight, causing the plate surface near the workstation to deviate from the original feeding plane and causing the positioning edge to tilt. To stabilize the feeding posture, in one embodiment, during forward feeding, the un-pre-folded plate area on the last strip side of the bending station is supported, and during reverse feeding, the pre-folded plate area on the first strip side of the current positioning fold is supported, so that it is located near the workstation on the feeding plane before the plate enters the workstation. The worker uses a height-adjustable support to receive the flat plate area of ​​the adjacent workstation, avoiding the bending line and the rotation range of the plate area, without having to forcibly restore the entire plate to a horizontal position.

[0031] After the support relationship is established, the supporting component mainly bears its own weight, but it still cannot prevent the lateral pull generated when the mold applies force. The positioning edge may leave the feeding reference at the moment of force application. To limit this displacement, in one embodiment, before each pre-bend or final bend, the plate is pressed on the inner side of a straight section adjacent to the positioning edge and located outside the bending station; after the bending mold leaves the plate, the pressing is released, and then the plate is moved along the feeding reference surface. The inner side of the straight section refers to the side from the positioning edge toward the inside of the plate, and the pressing position avoids the bending deformation zone; thus forming a fixed sequence of "positioning and contact, pressing and bending, releasing pressure, and continuing feeding", which maintains the bending position without hindering subsequent feeding.

[0032] As the reverse final fold continues, the folded area on the last side gradually lengthens, and its weight creates a deflection effect around the current positioning fold. If only the first side is supported, the plate is prone to twisting or lifting the positioning edge. To balance the load on both sides, in one embodiment, after the current positioning fold is completed, the pre-folded area on the first side is supported while the folded area on the last side is supported, so that the two support positions move synchronously in the opposite direction with the plate until the previous positioning fold is in place. The two support components respectively bear the flat plate areas on both sides of the current fold and avoid the range of action of the next fold, so that the plate remains stable during the return process.

[0033] Finally, after all final folds are completed, the first or last finished folded edge may be higher than the original feeding channel. If it continues to exit along the original path, it will encounter the mold or frame. To avoid this obstruction, in one embodiment, when the first or last finished folded edge blocks the original feeding path, the positioning edge is disengaged from the feeding reference plane, and the sheet is pulled out in a direction parallel to the bending line. This action is only performed during the unloading stage after all bending is completed; the worker first repositions the mold, releases the pressure and maintains the support, and then pulls it out from the side with lateral open space to prevent the formed edge from passing through the narrow channel again.

[0034] Working principle and usage process of this invention: This invention changes the existing method of direct final bending after a single feeding to a two-stage forming method: first, forming positioning ridges in the forward direction, and then forming final bending strip by strip in the reverse direction. The positioning ridges formed in the forward feeding stage have a dual function: firstly, after pressure relief, they maintain a continuous and recognizable ridge shape, serving as a solid alignment reference for re-entering the bending station at the corresponding bending position during reverse feeding; secondly, their inner angle is still larger than the inner angle of the finished product, ensuring that the plate areas on both sides of the ridge have not yet formed finished folded edges that occupy a large material passage space, thus allowing them to continue passing through the bending station with the plate. After the last positioning ridge is left in place for direct final bending, this location forms the connection between the forward and reverse stages, and the plate moves in the reverse direction along the original feeding path. During reverse feeding, the last side of the current positioning fold is the plate area that has completed its final fold and is gradually moving away from the workstation, while the first side is the pre-folded plate area that maintains throughput capacity. Each time the current positioning fold completes its final fold, that area transitions from the pre-folded state to the final folded state and is incorporated into the last side, causing the boundary between the two states to move towards the first side with each subsequent positioning fold. Thus, the positioning fold formed in the previous step determines the return position for the next step and, with its pre-folded state, ensures the necessary material passage space for the return, until all positions have completed their final folds.

[0035] In actual use, first mark the bending lines from beginning to end on the unfolded panels according to the finished cabinet outline, confirm the inner angle and bending direction of the finished product, and select one side of the feeding straight edge as the positioning edge for the entire process; before formal processing, use a test plate of the same material and thickness to determine the minimum pre-bending amount that can retain the positioning crease without affecting the material passing back and forth, and prepare corner samples corresponding to the inner angle of each finished product. Then, place the straight section of the positioning edge adjacent to the work station against the feeding reference surface, select the force application side according to each bending direction, and feed and pre-bend line by line from beginning to end while the corresponding plate area is supported and the positioning edge is pressed; after each pressure release, check the retention status of the positioning crease and the passage status of the next position. After the last positioning crease is formed, keep the crease in the work station and directly complete the final fold. Afterwards, release the pressure and move the sheet in the opposite direction so that both ends of the next positioning fold align with the bending reference line. Press the sheet again and perform the final fold. If it is necessary to correct the inner angle of the finished product, check with an angle sample after releasing the pressure and perform repeated folds in the same direction. The mold stop position determined for the first piece can be used for the corresponding part of the same batch of sheet with the same material and thickness. After each final fold is completed, with the first side pre-folded plate area and the last side already folded plate area receiving corresponding support, return the previous positioning fold aligner to the work station until the first positioning fold aligner completes the final fold. After confirming that all inner angles have reached the corresponding finished product state, move the bending mold aside and remove the sheet. If the finished folded edge blocks the original feeding path, release the reference abutment during processing and pull the formed sheet out from the side of the work station in a direction parallel to the bending line.

[0036] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A method for continuous bending and forming of cabinet panels, characterized in that, Includes the following steps: S1. According to the finished product outline, determine the multiple parallel bending lines arranged from the beginning to the end along the feeding direction on the unfolded plate, the inner included angle of each line and the bending direction, and take the straight feeding edge of one side of the plate as the positioning edge. S2. Keep the sheet metal from flipping over and ensure the positioning edges remain against the same feeding reference surface. Feed the sheet metal from beginning to end in a forward direction, allowing each bending line to enter the same bending station sequentially. After each line is in place, pre-bend only along the corresponding direction to form a positioning crease with an inner angle greater than the corresponding finished product's inner angle, which is retained after pressure release. Ensure that the sheet metal after each pre-bend, along with all previous positioning creases, can continue to pass through the bending station. After the last positioning crease is formed, do not move it out of the bending station; instead, bend it directly to the finished product's inner angle. Then, follow the original feeding path. The feed is reversed so that the positioning edges that have not yet been fully bent return sequentially from the end to the beginning. The final bending occurs when the positioning edge coincides with the bending reference line of the bending station. When feeding in reverse, the current positioning edge in the station is the boundary. All positioning edges on the last side are in a fully bent state and move away from the station as the feed is carried out. All positioning edges on the first side are in a pre-bent state that can pass through the station. Only after the current positioning edge is fully bent does the adjacent positioning edge on the first side return until the first positioning edge is fully bent. S3. Remove the cabinet panels that have been bent.

2. The method for continuous bending and forming of cabinet panels according to claim 1, characterized in that, Before formal processing, the pre-bending amount is gradually increased using a test plate of the same material and thickness, following the same bending line and bending direction as the plate. The minimum pre-bending amount is determined so that the positioning creases can be retained after the pressure is released and the test plate can still move back and forth to the bending station after all the positioning creases are formed.

3. The method for continuous bending and forming of cabinet panels according to claim 1, characterized in that, Using the plane where the unfolded sheet is located as a reference, the bending line with the bending direction upward is applied by the lower side of the sheet, and the bending line with the bending direction downward is applied by the upper side of the sheet. When changing the side of application of force, keep the sheet from flipping over.

4. The method for continuous bending and forming of cabinet panels according to claim 1, characterized in that, When feeding in reverse, feed is stopped after both ends of the positioning fold to be finalized coincide with the bending baseline, and the final fold position is determined solely by this positioning fold.

5. The method for continuous bending and forming of cabinet panels according to claim 1, characterized in that, During the final fold, first press the inner angle after depressurization to be greater than the inner angle of the finished product. Keep the positioning folded edge in the work position and check it with a corner sample whose inner angle is equal to the inner angle of the finished product. Then fold it in the same direction one after another until both sides of the plate area are in contact with the corner sample.

6. The method for continuous bending and forming of cabinet panels according to claim 5, characterized in that, Record the stopping position of the bending die when each positioning edge of the first piece is aligned with the corner sample. For subsequent pieces of the same batch, material and thickness, the corresponding positioning edges should be bent to the recorded stopping position first.

7. The method for continuous bending and forming of cabinet panels according to claim 1, characterized in that, When feeding in the forward direction, it supports the un-pre-folded plate area on the last side of the bending station. When feeding in the reverse direction, it supports the pre-folded plate area on the first side of the current positioning fold, so that it is close to the feeding plane of the station before the plate enters the station.

8. The method for continuous bending and forming of cabinet panels according to claim 7, characterized in that, Before each pre-bend or final bend, the plate is pressed on the inside of a straight section near the bending station and outside the station; after the bending die leaves the plate, the pressing is released, and then the plate is moved along the feeding reference surface.

9. A method for continuous bending and forming of cabinet panels according to claim 7, characterized in that, After the current positioning fold is completed, while supporting the pre-folded plate area on the first side, it also supports the plate area on the last side that has been completed, so that the two supporting positions move in the opposite direction synchronously with the plate until the previous positioning fold is in place.

10. A method for continuous bending and forming of cabinet panels according to claim 1, characterized in that, When the finished edge of the first or last folded piece blocks the original feeding path, the positioning edge is removed from the feeding reference surface, and the piece is pulled out in a direction parallel to the bending line.

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