A bending machine

Abstract

The present invention discloses a bending machine, which relates to the technical field of metal plate processing, and comprises a frame; a lower die, which is arranged on the frame; a lifting drive mechanism and an upper die, which can drive the upper die to descend, so that the upper die is molded with the lower die, and the upper die and the lower die can bend the metal plate; a first linear drive mechanism, a first limiting mechanism and a second limiting mechanism, the first linear drive mechanism is used to drive the first limiting mechanism and the second limiting mechanism to approach or move away from each other, so that the length of the gap between the first limiting mechanism and the second limiting mechanism can be equal to the length of the lug plate, the short side plate and the long side plate of the metal plate in sequence, and the gap between the first limiting mechanism and the second limiting mechanism can be smoothly arranged in sequence for the lug plate, the short side plate and the long side plate of the metal plate. The bending machine can know whether there is an error in the current bending sequence by observing whether there is a gap between the metal plate and the first limiting mechanism and the second limiting mechanism, which is conducive to reducing the scrap rate of the metal box.

Description

Technical Field

[0001] The invention relates to the technical field of metal plate processing, in particular to a bending machine. Background Art

[0002] A bending machine is a mechanical device used to process metal sheets. The bending machine can bend the metal sheet into a desired shape, such as a metal box or other metal parts, by adjusting the position of the upper die and the lower die and the applied pressure. In the process of bending the metal sheet into a metal box, the bending order directly affects the shape, stability and assembly performance of the metal box. At present, the metal sheet used to be bent into a metal box includes a bottom plate, a long side plate, a short side plate and a lug plate. The two long side plates are respectively arranged on the two long sides of the bottom plate, and the two long side plates are provided with lug plates on the side away from the bottom plate. The two short side plates are respectively arranged on the two short sides of the bottom plate. The bending order is to bend the lug plate first, then bend the short side plate, and finally bend the long side plate to obtain the metal box. The bottom plate forms the bottom wall of the metal box, the two long side plates form the two long side walls of the metal box, the two short side plates form the two short side walls of the metal box, the two short side walls are arranged between the two long side walls, and the lug plate forms the lug of the metal box.

[0003] In the prior art, an operator holds a metal plate and feeds it into a bending machine for bending according to the bending sequence in memory. This method of bending a metal plate based on the operator's memory can easily lead to errors in the bending sequence of the metal plate, which in turn leads to a high scrap rate of the metal box. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a bending machine that is conducive to reducing the scrap rate of metal boxes.

[0005] A bending machine according to an embodiment of the present invention comprises:

[0006] frame;

[0007] A lower die, the lower die is arranged on the frame, and the upper surface of the lower die is used to abut against the metal plate;

[0008] A lifting drive mechanism and an upper die, wherein the lifting drive mechanism is disposed on the frame, the upper die is disposed above the lower die, the upper die is connected to the output end of the lifting drive mechanism, and the lifting drive mechanism can drive the upper die to descend so that the upper die is clamped on the lower die, and the upper die and the lower die can bend the metal plate;

[0009] A first linear drive mechanism, a first limiting mechanism and a second limiting mechanism, wherein the first limiting mechanism and the second limiting mechanism can be slidably arranged on the lower die in the left-right direction, the first linear drive mechanism is arranged on the lower die, and the first linear drive mechanism is used to drive the first limiting mechanism and the second limiting mechanism to approach or move away from each other, so that the length of the gap between the first limiting mechanism and the second limiting mechanism can be equal to the length of the lug plate, the short side plate and the long side plate of the metal plate in sequence, and the gap between the first limiting mechanism and the second limiting mechanism can be provided for the lug plate, the short side plate and the long side plate of the metal plate to pass through in sequence.

[0010] At least the following beneficial effects are achieved:

[0011] When the metal plate needs to be bent, the first linear drive mechanism first drives the first limiting mechanism and the second limiting mechanism to move closer to or farther from each other, and first makes the gap between the first limiting mechanism and the second limiting mechanism equal to the size of the lug plate of the metal plate. Then the operator holds the metal plate and abuts the metal plate against the upper surface of the lower die. Since the gap between the first limiting mechanism and the second limiting mechanism is equal to the length of the lug plate of the metal plate, the lug plate of the metal plate can be put into the gap between the first limiting mechanism and the second limiting mechanism, and there is no gap between the lug plate of the metal plate and the first limiting mechanism and the second limiting mechanism, that is, the first limiting mechanism and the second limiting mechanism are just in the state of clamping the lug plate of the metal plate. At this time, the operator can know that the current step of bending the lug plate is correct, and then the lifting drive mechanism drives the lower die to close the die to the lower die, so that the lug plate is bent. After both lug plates of the metal plate are bent, the first linear drive mechanism continues to drive the first limiting mechanism and the second limiting mechanism to move closer to or farther from each other, and then makes the gap between the first limiting mechanism and the second limiting mechanism equal to the length of the short side plate of the metal plate. Since the gap distance between the first limiting mechanism and the second limiting mechanism is equal to the length of the short side plate of the metal plate, the short side plate of the metal plate can be placed in the gap between the first limiting mechanism and the second limiting mechanism, and there is no gap between the short side plate of the metal plate and the first limiting mechanism and the second limiting mechanism, that is, the first limiting mechanism and the second limiting mechanism are just in a state of clamping the short side plate of the metal plate. At this time, the operator can know that the current step of bending the short side plate is correct, and then the lifting drive mechanism drives the lower mold to close the mold on the lower mold, so that the short side plate is bent.

[0012] After both short side plates of the metal plate are bent, the first linear drive mechanism continues to drive the first limiting mechanism and the second limiting mechanism to move closer to or farther from each other, and then the gap distance between the first limiting mechanism and the second limiting mechanism is equal to the length of the long side plate of the metal plate. Since the gap distance between the first limiting mechanism and the second limiting mechanism is equal to the length of the long side plate of the metal plate, the long side plate of the metal plate can be put into the gap between the first limiting mechanism and the second limiting mechanism, and there is no gap between the long side plate of the metal plate and the first limiting mechanism and the second limiting mechanism, that is, the first limiting mechanism and the second limiting mechanism are just in a state of clamping the long side plate of the metal plate. At this time, the operator can know that the current step of bending the long side plate is correct, and then the lifting drive mechanism drives the lower mold to close the mold on the lower mold, so that the long side plate is bent. The first linear drive mechanism drives the first limiting mechanism and the second limiting mechanism to move closer to or farther from each other in sequence, so that the gap distance between the first limiting mechanism and the second limiting mechanism is equal to the length of the lug plate, the short side plate and the long side plate of the metal plate in sequence. The first limiting mechanism and the second limiting mechanism play a limiting role on the metal plate. When the operator cannot put the lug plate, the short side plate and the long side plate into the gap between the first limiting mechanism and the second limiting mechanism, or the operator observes that there is a gap between the lug plate, the short side plate and the long side plate and the first limiting mechanism and the second limiting mechanism, it can be known that the current sequence is wrong; when the operator observes that there is no gap between the lug plate, the short side plate and the long side plate and the first limiting mechanism and the second limiting mechanism, it can be known that the current sequence is correct. The bending machine can know whether there is an error in the current bending sequence through the first limiting mechanism and the second limiting mechanism, which plays a role in reminding the operator, has a fool-proof effect, and is conducive to reducing the scrap rate of the metal box.

[0013] According to an embodiment of the present invention, the bending machine further includes a counting controller, which is used to record the number of times the lower mold and the upper mold are closed and control the start and stop of the first linear drive mechanism, so that after the lower mold and the upper mold are closed twice, the counting controller controls the first linear drive mechanism to start.

[0014] According to an embodiment of the present invention, the bending machine further includes a foot switch, which is electrically connected to the lifting drive mechanism, and the foot switch is electrically connected to the first linear drive mechanism. When the foot switch is pressed, the lifting drive mechanism drives the upper mold to close to the lower mold, and the first linear drive mechanism drives the first limiting mechanism and the second limiting mechanism to move away from each other. When the foot switch is released, the lifting drive mechanism drives the upper mold to move away from the lower mold, and the first linear drive mechanism drives the first limiting mechanism and the second limiting mechanism to move closer to each other.

[0015] According to an embodiment of the present invention, the bending machine also includes a positioning block and a second linear drive mechanism, the second linear drive mechanism is arranged on the frame, the positioning block is arranged below the upper die, the positioning block is arranged behind the lower die, the positioning block is connected to the output end of the second linear drive mechanism, and the second linear drive mechanism is used to drive the positioning block to move in the front and rear directions, so that the positioning block can sequentially abut against the lug plate, short side plate and long side plate of the metal plate, and make the bending areas of the lug plate, short side plate and long side plate of the metal plate align with the upper die in sequence.

[0016] According to the bending machine of the embodiment of the present invention, a guide through hole and a guide strip hole are provided on the lower die, and the guide through hole and the guide strip hole are both parallel to the left and right directions, and the guide strip hole is opened on the upper surface of the lower die and is connected with the guide through hole, the first limiting mechanism includes a first limiting column, and the second limiting mechanism includes a second limiting column, and the first limiting column and the second limiting column are both parallel to the up and down directions, and the lower ends of the first limiting column and the second limiting column are both penetrated into the guide strip hole and the guide through hole, and the upper ends of the first limiting column and the second limiting column both extend out of the upper surface of the lower die, and the lower ends of the first limiting column and the second limiting column are both connected to the output end of the first linear drive mechanism, and the gap between the first limiting column and the second limiting column is used for the lug plate, short side plate or long side plate of the metal plate to pass through.

[0017] According to the bending machine of the embodiment of the present invention, the cross-section of the guide through hole is square, and the first linear drive mechanism includes a screw, a motor, a first nut and a second nut. The screw is parallel to the left and right directions and is arranged in the guide through hole. The outer wall of the screw is provided with a first external thread and a second external thread, and the rotation direction of the first external thread and the second external thread are opposite. The first nut and the second nut are both arranged in the guide through hole, and the first nut and the second nut are both abutted against the inner wall of the guide through hole. The first nut is threadedly connected to the first external thread, the first nut is connected to the lower end of the first limiting column, the second nut is threadedly connected to the second external thread, and the second nut is connected to the lower end of the second limiting column. The output end of the motor is connected to one end of the screw, and the motor is used to drive the screw to rotate so that the first nut and the second nut respectively drive the first limiting column and the second limiting column to approach or move away from each other.

[0018] The bending machine according to the embodiment of the present invention further includes a lamp, which is arranged on the frame and is used to illuminate the gap between the first limiting mechanism and the second limiting mechanism.

[0019] According to the bending machine of an embodiment of the present invention, the upper die includes a forming block, and the lower die is provided with a forming groove, the forming block can extend into the forming groove, the forming block is used to extrude the metal plate, and the inner wall of the forming groove is used to abut against the metal plate, so that the inner wall of the forming groove and the forming block can bend the metal plate.

[0020] According to an embodiment of the present invention, the bending machine also includes a first heating mechanism and a second heating mechanism. The first heating mechanism is used to heat the forming block so that the forming block transfers heat to the bending zone of the metal plate and increases the temperature of the bending zone of the metal plate. The second heating mechanism is used to heat the bottom wall of the forming groove so that the bottom wall of the forming groove transfers heat to the bending zone of the metal plate.

[0021] According to the bending machine of an embodiment of the present invention, the first heating mechanism includes a first heating rod, the first heating rod is arranged on the forming block, the first heating rod is used to generate heat to increase the temperature of the forming block, the second heating mechanism includes a second heating rod, a second mounting hole is opened on the lower mold, the second mounting hole is arranged below the bottom wall of the forming groove, the second heating rod is inserted into the second mounting hole, and the second heating rod is used to generate heat to increase the temperature of the bottom wall of the forming groove.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0024] Figure 1 This is a schematic structural diagram of a metal plate according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of a metal box according to an embodiment of the present invention;

[0026] Figure 3 It is a structural schematic diagram of a bending machine according to an embodiment of the present invention;

[0027] Figure 4 for Figure 3 A schematic diagram of the local enlarged structure at point A in the middle;

[0028] Figure 5 It is a schematic diagram of the structure in which the lug plate of the metal plate is arranged between the first limiting mechanism and the second limiting mechanism;

[0029] Figure 6 It is a schematic diagram of a structure in which a short side plate of a metal plate is arranged between a first limiting mechanism and a second limiting mechanism;

[0030] Figure 7 It is a schematic diagram of a structure in which a long side plate of a metal plate is arranged between a first limiting mechanism and a second limiting mechanism;

[0031] Figure 8 It is a schematic structural diagram of a first limiting mechanism, a second limiting mechanism, a lower die and a first linear drive mechanism in a bending machine according to an embodiment of the present invention;

[0032] Fig. 9 for Figure 8 A partial enlarged schematic diagram of point B in the middle;

[0033] Fig.10 It is a structural schematic diagram of a first linear drive mechanism in a bending machine according to an embodiment of the present invention;

[0034] Fig.11 It is a top view of a first nut, a second nut, a first limiting mechanism, a second limiting mechanism, a first elastic member, and a second elastic member in a bending machine according to an embodiment of the present invention;

[0035] Reference numerals:

[0036] Frame 100; lower die 110; guide through hole 111; guide strip hole 112; forming groove 113; foot switch 120;

[0037] Lifting drive mechanism 200; upper mold 210; forming block 211;

[0038] The first linear drive mechanism 300; the screw rod 310; the first external thread 311; the second external thread 312; the motor 320; the first nut 330; the first slide groove 331; the second nut 340; the second slide groove 341; the first elastic member 350; the second elastic member 360;

[0039] A first limiting mechanism 400; a second limiting mechanism 500;

[0040] Second linear drive mechanism 600; positioning block 610;

[0041] A first heating mechanism 700 ; a second heating mechanism 800 . DETAILED DESCRIPTION

[0042] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0043] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] In the description of the present invention, "a plurality" means more than two. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0045] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0046] refer to Figures 3 to 7 , according to an embodiment of the present invention, a bending machine comprises:

[0047] Rack 100;

[0048] A lower die 110, the lower die 110 is disposed on the frame 100, and the upper surface of the lower die 110 is used to abut against the metal plate;

[0049] The lifting drive mechanism 200 and the upper die 210, the lifting drive mechanism 200 is arranged on the frame 100, the upper die 210 is arranged above the lower die 110, the upper die 210 is connected to the output end of the lifting drive mechanism 200, the lifting drive mechanism 200 can drive the upper die 210 to descend, so that the upper die 210 is molded with the lower die 110, and the upper die 210 and the lower die 110 can bend the metal plate;

[0050] The first linear drive mechanism 300, the first limiting mechanism 400 and the second limiting mechanism 500, the first limiting mechanism 400 and the second limiting mechanism 500 can be slidably arranged on the lower mold 110 along the left and right directions, the first linear drive mechanism 300 is arranged on the lower mold 110, the first linear drive mechanism 300 is used to drive the first limiting mechanism 400 and the second limiting mechanism 500 to approach or move away from each other, so that the length of the gap between the first limiting mechanism 400 and the second limiting mechanism 500 can be equal to the length of the lug plate, the short side plate and the long side plate of the metal plate in turn, and the gap between the first limiting mechanism 400 and the second limiting mechanism 500 can be allowed to pass through the lug plate, the short side plate and the long side plate of the metal plate in turn.

[0051] It can be understood that when the metal plate needs to be bent, the first linear drive mechanism 300 first drives the first limiting mechanism 400 and the second limiting mechanism 500 to move closer to or away from each other, first making the gap distance between the first limiting mechanism 400 and the second limiting mechanism 500 equal to the length of the lug plate of the metal plate. Then the operator holds the metal plate and places the metal plate against the upper surface of the lower mold 110. Since the gap distance between the first limiting mechanism 400 and the second limiting mechanism 500 is equal to the length of the lug plate of the metal plate, the lug plate of the metal plate can be put into the gap between the first limiting mechanism 400 and the second limiting mechanism 500, and there is no gap between the lug plate of the metal plate and the first limiting mechanism 400 and the second limiting mechanism 500, that is, the first limiting mechanism 400 and the second limiting mechanism 500 are just in a state of clamping the lug plate of the metal plate. At this time, the operator can know that the current step of bending the lug plate is correct, and then the lifting drive mechanism 200 drives the lower mold 110 to close the mold on the lower mold 110, so that the lug plate is bent.

[0052] After both lugs of the metal plate are bent, the first linear drive mechanism 300 continues to drive the first limiting mechanism 400 and the second limiting mechanism 500 to move closer to or farther from each other, and then the gap distance between the first limiting mechanism 400 and the second limiting mechanism 500 is equal to the length of the short side plate of the metal plate. Since the gap distance between the first limiting mechanism 400 and the second limiting mechanism 500 is equal to the length of the short side plate of the metal plate, the short side plate of the metal plate can be put into the gap between the first limiting mechanism 400 and the second limiting mechanism 500, and there is no gap between the short side plate of the metal plate and the first limiting mechanism 400 and the second limiting mechanism 500, that is, the first limiting mechanism 400 and the second limiting mechanism 500 are just in a state of clamping the short side plate of the metal plate. At this time, the operator can know that the current step of bending the short side plate is correct, and then the lifting drive mechanism 200 drives the lower mold 110 to close the mold on the lower mold 110, so that the short side plate is bent.

[0053] After both short side plates of the metal plate are bent, the first linear drive mechanism 300 continues to drive the first limiting mechanism 400 and the second limiting mechanism 500 to move closer to or farther from each other, and then make the gap distance between the first limiting mechanism 400 and the second limiting mechanism 500 equal to the length of the long side plate of the metal plate. Since the gap distance between the first limiting mechanism 400 and the second limiting mechanism 500 is equal to the length of the long side plate of the metal plate, the long side plate of the metal plate can be put into the gap between the first limiting mechanism 400 and the second limiting mechanism 500, and there is no gap between the long side plate of the metal plate and the first limiting mechanism 400 and the second limiting mechanism 500, that is, the first limiting mechanism 400 and the second limiting mechanism 500 are just in a state of clamping the long side plate of the metal plate. At this time, the operator can know that the current step of bending the long side plate is correct, and then the lifting drive mechanism 200 drives the lower mold 110 to close the mold on the lower mold 110, so that the long side plate is bent. The first linear drive mechanism 300 drives the first limiting mechanism 400 and the second limiting mechanism 500 to move closer to or away from each other in sequence, so that the gap distance between the first limiting mechanism 400 and the second limiting mechanism 500 is equal to the length of the lug plate, the short side plate and the long side plate of the metal plate in sequence. The first limiting mechanism 400 and the second limiting mechanism 500 play a limiting role on the metal plate. When the operator cannot put the lug plate, the short side plate and the long side plate into the gap between the first limiting mechanism 400 and the second limiting mechanism 500, or the operator observes that there is a gap between the lug plate, the short side plate and the long side plate and the first limiting mechanism 400 and the second limiting mechanism 500, it can be known that the current sequence is wrong; when the operator observes that there is no gap between the lug plate, the short side plate and the long side plate and the first limiting mechanism 400 and the second limiting mechanism 500, it can be known that the current sequence is correct. The bending machine can know whether there is an error in the current bending sequence through the first limiting mechanism 400 and the second limiting mechanism 500, which is helpful to reduce the scrap rate of the metal box.

[0054] In the embodiment of the present invention, reference Figure 1 and Figure 2, the length of the short side plate of the metal plate is L1, the length of the lug plate of the metal plate is L2, and the length of the long side plate of the metal plate is L3, L1<L2<L3. In an embodiment of the present invention, the metal plate includes a bottom plate, two short side plates, two long side plates and two lug plates. As an embodiment of the present invention, the bending machine also includes a counting controller, which is used to record the number of times the lower mold 110 and the upper mold 210 are molded together and control the start and stop of the first linear drive mechanism 300, so that after the lower mold 110 and the upper mold 210 are molded together twice, the counting controller controls the first linear drive mechanism 300 to start. It can be understood that, assuming that the current gap distance between the first limiting mechanism 400 and the second limiting mechanism 500 is L2, that is, the current bending sequence requires bending the lug plate. When the upper mold 210 and the lower mold 110 are molded twice, that is, the two lug plates are bent twice, the number of mold closings recorded by the counting controller is two, and the counting controller controls the first linear drive mechanism 300 to start, so that the gap distance between the first limit drive mechanism and the second limit drive mechanism is L1. The current bending sequence is that the short side plate needs to be bent. When the upper mold 210 and the lower mold 110 are molded twice, that is, the two short side plates are bent twice, the number of mold closings recorded by the counting controller is two, and the counting controller controls the first linear drive mechanism 300 to start, so that the gap distance between the first limit drive mechanism and the second limit drive mechanism is L3. The current bending sequence is that the long side plate needs to be bent. When the upper mold 210 and the lower mold 110 are molded twice, that is, the two long side plates are bent twice, the number of mold closings recorded by the counting controller is two, and the counting controller controls the first linear drive mechanism 300 to start, so that the gap distance between the first limit drive mechanism and the second limit drive mechanism is L2. By analogy, every time the upper mold 210 and the lower mold 110 are closed twice, the counting controller controls the first linear drive mechanism 300 to start once, so that the gap distance between the first limit mechanism 400 and the second limit mechanism 500 is L2, L1 and L3 in sequence, and the gap distance is repeated, that is, it changes from L3 to L2, and from L2 to L1. After the lower mold 110 and the upper mold 210 are closed twice, the first linear drive mechanism 300 drives the first limit mechanism 400 and the second limit mechanism 500 to move closer to or away from each other, ensuring that the next distance adjustment is performed only after the two lug plates, two short side plates or two long side plates are bent, thereby preventing the operator from missing the bending of one of the lug plates, short side plates or long side plates.

[0055] As an embodiment of the present invention, the counting controller includes a trigger switch, which is arranged on the upper mold 210 or the lower mold 110. The lower mold 110 and the lower mold 110 are closed once, the trigger switch is triggered once, and the counting controller counts once. It should be explained that the counting controller is a common controller, which can record the number of movements of the corresponding parts. When the number of movements reaches a corresponding number, the counting controller will control the corresponding device to start or shut down.

[0056] refer to Figure 3 and Figure 8The bending machine further includes a foot switch 120, which is electrically connected to the lifting drive mechanism 200, and the foot switch 120 is electrically connected to the first linear drive mechanism 300. When the foot switch 120 is pressed, the lifting drive mechanism 200 drives the upper mold 210 to close the mold on the lower mold 110, and the first linear drive mechanism 300 drives the first limiting mechanism 400 and the second limiting mechanism 500 to move away from each other by a preset length. When the foot switch 120 is released, the lifting drive mechanism 200 drives the upper mold 210 away from the lower mold 110, and the first linear drive mechanism 300 drives the first limiting mechanism 400 and the second limiting mechanism 500 to move closer to each other by a preset length. It can be understood that the first linear drive mechanism 300 and the lifting drive mechanism 200 are both electrically connected to the foot switch 120, and the foot switch 120 is used to control the start and stop of the lifting drive mechanism 200 and the first linear drive mechanism 300. Assume that the lug plate needs to be bent, and the distance between the first limiting mechanism 400 and the second limiting mechanism 500 is L2. The operator places the lug plate on the lower mold 110 and arranges the lug plate between the first limiting mechanism 400 and the second limiting mechanism 500. The operator steps on the foot switch 120, so that the foot switch 120 is pressed and triggered. At this time, the lifting drive mechanism 200 drives the upper mold 210 to descend and close the mold with the lower mold 110, so that the lower mold 110 and the upper mold 210 can bend the lug plate. At the same time, during the descent of the upper mold 210, the first linear drive mechanism 300 drives the first limiting mechanism 400 and the second limiting mechanism 500 to move away from each other by a preset length, so that the distance between the first limiting mechanism 400 and the second limiting mechanism 500 is the sum of the preset length and L2, so that the first limiting mechanism 400 and the second limiting mechanism 500 cannot abut against the lug plate, effectively avoiding the first limiting mechanism 400 and the second limiting structure from interfering with the bending process of the metal plate, thereby further improving the yield rate of the metal box. When the operator releases the foot switch 120, it means that the bending is completed. At this time, the upper mold 210 rises, and the first linear drive mechanism 300 drives the first limiting mechanism 400 and the second limiting mechanism 500 to approach each other by a preset length, so that the distance between the first limiting mechanism 400 and the second limiting mechanism 500 returns to L2, and the next lug plate is limited. In the embodiment of the present invention, during the downward pressing of the lower mold 110, the first limiting mechanism 400 and the second limiting mechanism 500 can be separated from each other by a preset length, which effectively avoids the first limiting mechanism 400 and the second limiting mechanism 500 from affecting the lug plate, the short side plate and the long side plate of the metal plate due to abutment during the bending process, which is conducive to improving the yield rate of the metal box.

[0057] In the embodiment of the present invention, the bending area refers to the area where the upper die 210 and the lower die 110 squeeze the metal plate, that is, the area where the metal plate is deformed. Figure 1In the figure, area a is the bending area of ​​the short side plate, area b is the bending area of ​​the lug plate, and area c is the bending area of ​​the long side plate. In the present invention, the bending area of ​​the metal plate refers to the bending area a of the short side plate, the bending area b of the lug plate, and the bending area c of the long side plate. Figure 4 The bending machine also includes a positioning block 610 and a second linear drive mechanism 600. The second linear drive mechanism 600 is arranged on the frame 100. The positioning block 610 is arranged below the upper mold 210. The positioning block 610 is arranged behind the lower mold 110. The positioning block 610 is connected to the output end of the second linear drive mechanism 600. The second linear drive mechanism 600 is used to drive the positioning block 610 to move in the front-to-back direction so that the positioning block 610 can sequentially abut against the lug plate, short side plate and long side plate of the metal plate, and the bending areas of the lug plate, short side plate and long side plate of the metal plate can be aligned with the upper mold 210. It is understandable that when the lug plate of the metal plate needs to be bent, the second linear drive mechanism 600 drives the positioning block 610 to move in the front-to-back direction, and the operator extends the lug plate of the metal plate into the gap between the first limiting mechanism 400 and the second limiting mechanism 500. At this time, the lug plate of the metal plate abuts against the positioning block 610, and the operator cannot continue to push the metal plate backward, which means that the current metal plate is in the correct position. At this time, the bending area of ​​the lug plate is aligned with the upper mold 210, and the upper mold 210 and the lower mold 110 are combined to squeeze the bending area of ​​the lug plate, so that the lug plate forms the lug of the metal box. By analogy, the second linear drive mechanism 600 drives the positioning block 610 to move forward and backward, so that when the positioning block 610 abuts against the short side plate, the bending area of ​​the short side plate is aligned with the upper mold 210; when the positioning block 610 abuts against the long side plate, the bending area of ​​the long side plate is aligned with the upper mold 210.

[0058] It should be explained that the second linear drive mechanism 600 moves the positioning plate in the order of the lug plate, the short side plate and the long side plate. The lug plate, the short side plate and the long side plate can be positioned by changing the distance between the positioning block 610 and the lower mold 110. When the distance between the positioning block 610 and the lower mold 110 is the first distance, the lug plate abuts against the positioning block 610, and the bending area of ​​the lug plate is aligned with the upper mold 210; when the distance between the positioning block 610 and the lower mold 110 is the second distance, the short lug plate abuts against the positioning block 610, and the bending area of ​​the short lug plate is aligned with the upper mold 210; when the distance between the positioning block 610 and the lower mold 110 is the third distance, the long lug plate abuts against the positioning block 610, and the bending area of ​​the long lug plate is aligned with the upper mold 210. The second linear drive mechanism 600 sequentially drives the positioning block 610 to move in the front-rear direction, so that the distance between the positioning block 610 and the lower mold 110 is sequentially the first distance, the second distance and the third distance, and this sequence is repeated.

[0059] refer to Figure 8 and Fig. 9The lower mold 110 is provided with a first guide blind hole, a second guide blind hole, a first guide strip hole 112 and a second guide strip hole 112. The first guide blind hole, the second guide blind hole, the first guide strip hole 112 and the second guide strip hole 112 are all parallel to the left and right directions. The first guide blind hole and the second guide blind hole are symmetrical to the left and right. The first guide strip hole 112 is provided on the upper surface of the lower mold 110 and is connected to the first guide blind hole. The second guide strip hole 112 is provided on the upper surface of the lower mold 110 and is connected to the second guide blind hole. The first guide strip hole 112 and the second guide strip hole 112 are symmetrical to the left and right. The first limiting mechanism 400 includes a first limiting column. The first limiting column is parallel to the up-down direction, the lower end of the first limiting column is passed through the first guide strip hole 112 and the first guide blind hole, the upper end of the first limiting column extends out of the lower surface of the lower mold 110, the second limiting mechanism 500 includes a second limiting column, the second limiting column is parallel to the up-down direction, the lower end of the second limiting column is passed through the second guide strip hole 112 and the second guide blind hole, the upper end of the second limiting column extends out of the lower surface of the lower mold 110, the lower ends of the first limiting column and the second limiting column are both connected to the output end of the first linear drive mechanism 300, and the gap between the first limiting column and the second limiting column is used for the lug plate, short side plate or long side plate of the metal plate to pass through.

[0060] refer to Figure 8 and Fig. 9 The lower mold 110 is provided with a guide through hole 111 and a guide strip hole 112, which are both parallel to the left and right directions. The guide strip hole 112 is provided on the upper surface of the lower mold 110 and is connected to the guide through hole 111. The first limiting mechanism 400 includes a first limiting column, and the second limiting mechanism 500 includes a second limiting column. The first limiting column and the second limiting column are both parallel to the up and down directions. The lower ends of the first limiting column and the second limiting column are both penetrated into the guide strip hole 112 and the guide through hole 111, and the upper ends of the first limiting column and the second limiting column extend out of the upper surface of the lower mold 110. The lower ends of the first limiting column and the second limiting column are both connected to the output end of the first linear drive mechanism 300, and the gap between the first limiting column and the second limiting column is used for the lug plate, short side plate or long side plate of the metal plate to pass through.

[0061] It is understandable that the first limiting post and the second limiting post limit the lug plate, short side plate and long side plate of the metal plate. The operator can know whether the current sequence is wrong by observing whether there is a gap between the lug plate, short side plate or long side plate of the metal plate and the first limiting post and the second limiting post. That is, when there is no gap between the lug plate, short side plate or long side plate of the metal plate and the first limiting post and the second limiting post, it means that the current bending sequence is correct; when there is a gap between the lug plate, short side plate or long side plate of the metal plate and the first limiting post and the second limiting post, it means that the current bending sequence is wrong; or when the lug plate, short side plate or long side plate of the metal plate cannot be placed between the first limiting post and the second limiting post, it also means that the current bending sequence is wrong.

[0062] refer to Fig. 9 and Fig.10 The cross section of the guide through hole 111 is square. The first linear drive mechanism 300 includes a screw rod 310, a motor 320, a first nut 330 and a second nut 340. The screw rod 310 is parallel to the left and right directions and is arranged in the guide through hole 111. The outer wall of the screw rod 310 is provided with a first external thread 311 and a second external thread 312. The first external thread 311 and the second external thread 312 have opposite rotation directions. The first nut 330 and the second nut 340 are both arranged in the guide through hole 111. The first nut 330 and the second nut 340 are arranged in the guide through hole 111. 0 are both in contact with the inner wall of the guide through hole 111, the first nut 330 is threadedly connected with the first external thread 311, the first nut 330 is connected to the lower end of the first limiting column, the second nut 340 is threadedly connected with the second external thread 312, the second nut 340 is connected to the lower end of the second limiting column, the output end of the motor 320 is connected to one end of the screw rod 310, and the motor 320 is used to drive the screw rod 310 to rotate so that the first nut 330 and the second nut 340 respectively drive the first limiting column and the second limiting column to move closer or farther from each other. It can be understood that the cross section of the guide through hole 111 is square, that is, the guide through hole 111 is a square hole. Since the first external thread 311 and the second external thread 312 have opposite rotation directions, the first nut 330 and the second nut 340 are threadedly connected with the first external thread 311 and the second external thread 312 respectively, so the first nut 330 and the second nut 340 have opposite rotation directions. The motor 320 drives the screw rod 310 to rotate. Since the rotation directions are opposite, the first nut 330 and the second nut 340 move in opposite directions, thereby causing the first nut 330 and the second nut 340 to respectively drive the first limiting column and the second limiting column to move closer to or away from each other.

[0063] As an embodiment of the present invention, refer to Fig.11A first slide groove 331 parallel to the left and right directions is formed on the first nut 330, and a second slide groove 341 parallel to the left and right directions is formed on the second nut 340. The left inner wall of the first slide groove 331 and the right inner wall of the second slide groove 341 are arranged opposite to each other. The lower end of the first limiting column can be connected to the inner wall of the first slide groove 331 by sliding movement left and right, and the lower end of the second limiting column can be connected to the inner wall of the second slide groove 341 by sliding movement left and right. The bending machine also includes a first elastic member 350 and a second elastic member 360. The first elastic member 350 is arranged in the first slide groove 331. The right end of the first elastic member 350 is connected to the first nut 330, and the left end of the first elastic member 350 is connected to the lower end of the first limiting column. The first elastic member 350 is used to push the first limiting column so that the first limiting column abuts against the left inner wall of the first slide groove 331. The second elastic member 360 is arranged in the second slide groove 341. The left end of the second elastic member 360 is connected to the second nut 340, and the right end of the second elastic member 360 is connected to the lower end of the second limiting column. The second elastic member 360 is used to push the second limiting column so that the second limiting column abuts against the right inner wall of the second slide groove 341. It is understandable that when the operator needs to place the lug plate, short side plate or long side plate of the metal plate between the first limiting column and the second limiting column, the first limiting column and the second limiting column can be separated from each other first, the first elastic member 350 and the second elastic member 360 can be compressed, and then the lug plate, short side plate or long side plate of the metal plate can be placed between the first limiting column and the second limiting column. Under the action of the first elastic member 350 and the second elastic member 360, the first limiting column and the second limiting column are close to each other and clamp the lug plate, short side plate or long side plate of the metal plate, thereby improving the convenience for the operator to place the lug plate, short side plate or long side plate of the metal plate between the first limiting column and the second limiting column.

[0064] As an embodiment of the present invention, the bending machine further includes a lamp, which is disposed on the frame 100 and is used to illuminate the gap between the first limiting mechanism 400 and the second limiting mechanism 500. It is understandable that the lamp can illuminate the gap between the first limiting mechanism 400 and the second limiting mechanism 500, so that the operator can clearly see whether there is a gap between the lug plate, the short side plate or the long side plate of the metal plate and the first limiting mechanism 400 and the second limiting mechanism 500, which is conducive to improving the judgment accuracy of the operator.

[0065] refer to Figure 4 The upper die 210 is detachably connected to the output end of the lifting drive mechanism 200, and the lower die 110 is detachably connected to the frame 100. It can be understood that the upper die 210 is detachably connected to the output end of the lifting drive mechanism 200, and the lower die 110 is detachably connected to the frame 100. When it is necessary to bend metal plates of different specifications, the operator can replace the upper die 210 and the lower die 110 corresponding to the specifications of the metal plates, thereby improving the applicability of the bending machine.

[0066] refer to Figure 4 and Fig. 9 The upper die 210 includes a forming block 211, and a forming groove 113 is provided on the lower die 110. The forming block 211 can extend into the forming groove 113. The forming block 211 is used to extrude the metal plate. The inner wall of the forming groove 113 is used to abut against the metal plate, so that the inner wall of the forming groove 113 and the forming block 211 can bend the metal plate. It can be understood that the operator places the metal plate on the upper surface of the lower die 110. At this time, the bending area of ​​the metal plate is between the forming groove 113 and the forming block 211. The forming block 211 presses the bending area of ​​the metal plate downward, so that the forming block 211 and the bending area of ​​the metal plate are mutually squeezed, and the inner wall of the forming groove 113 and the bending area of ​​the metal plate are mutually squeezed. After a certain period of time, the bending area of ​​the metal plate can be deformed to complete the bending of the metal plate.

[0067] refer to Figure 4 The bending machine also includes a first heating mechanism 700 and a second heating mechanism 800. The first heating mechanism 700 is used to heat the forming block 211 so that the forming block 211 transfers heat to the bending area of ​​the metal plate. The second heating mechanism 800 is used to heat the bottom wall of the forming groove 113 so that the bottom wall of the forming groove 113 transfers heat to the bending area of ​​the metal plate. It can be understood that the first heating mechanism 700 and the second heating mechanism 800 can increase the temperature of the inner wall of the forming groove 113 and the forming block 211. In the process of the inner wall of the forming groove 113 and the forming block 211 squeezing and bending the bending area of ​​the metal plate, the inner wall of the forming groove 113 and the forming block 211 can transfer heat to the bending area of ​​the metal plate, thereby increasing the temperature of the bending area of ​​the metal plate. The increase in the temperature of the bending area of ​​the metal plate is conducive to reducing the internal stress of the bending area of ​​the metal plate during the deformation process, reducing the amount of springback of the metal plate after bending, and thus helping to improve the yield rate of the metal box.

[0068] refer to Figure 4 The first heating mechanism 700 includes a first heating rod, which is inserted into the forming block 211 and used to generate heat to increase the temperature of the forming block 211. The second heating mechanism 800 includes a second heating rod, a second mounting hole is provided on the lower mold 110, and the second mounting hole is provided below the bottom wall of the forming groove 113. The second heating rod is inserted into the second mounting hole and used to generate heat to increase the temperature of the bottom wall of the forming groove 113. It can be understood that the second mounting hole is provided below the bottom wall of the forming groove 113, so that the heat generated by the second heating rod can be more concentrated on the bottom wall of the forming groove 113, thereby enabling the bottom wall of the forming groove 113 to more effectively transfer heat to the bending area of ​​the metal plate.

[0069] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A bending machine, characterized in that: include: frame; A lower die, the lower die is arranged on the frame, and the upper surface of the lower die is used to abut against the metal plate; A lifting drive mechanism and an upper die, wherein the lifting drive mechanism is disposed on the frame, the upper die is disposed above the lower die, the upper die is connected to the output end of the lifting drive mechanism, and the lifting drive mechanism can drive the upper die to descend so that the upper die is clamped on the lower die, and the upper die and the lower die can bend the metal plate; a first linear drive mechanism, a first limiting mechanism and a second limiting mechanism, wherein the first limiting mechanism and the second limiting mechanism can be slidably arranged on the lower die in the left-right direction, the first linear drive mechanism is arranged on the lower die, and the first linear drive mechanism is used to drive the first limiting mechanism and the second limiting mechanism to move closer to or farther from each other, so that the length of the gap between the first limiting mechanism and the second limiting mechanism can be equal to the length of the lug plate, the short side plate and the long side plate of the metal plate in sequence, and the gap between the first limiting mechanism and the second limiting mechanism can be passed through by the lug plate, the short side plate and the long side plate of the metal plate in sequence; A counting controller, the counting controller is used to record the number of times the lower mold and the upper mold are closed and control the start and stop of the first linear drive mechanism, so that after the lower mold and the upper mold are closed twice, the counting controller controls the first linear drive mechanism to start; A foot switch, wherein the foot switch is electrically connected to the lifting drive mechanism, and the foot switch is electrically connected to the first linear drive mechanism. When the foot switch is pressed, the lifting drive mechanism drives the upper mold to close to the lower mold, and the first linear drive mechanism drives the first limiting mechanism and the second limiting mechanism to move away from each other. When the foot switch is released, the lifting drive mechanism drives the upper mold to move away from the lower mold, and the first linear drive mechanism drives the first limiting mechanism and the second limiting mechanism to move closer to each other.

2. The bending machine according to claim 1, characterized in that: It also includes a positioning block and a second linear drive mechanism, the second linear drive mechanism is arranged on the frame, the positioning block is arranged below the upper mold, the positioning block is arranged behind the lower mold, the positioning block is connected to the output end of the second linear drive mechanism, and the second linear drive mechanism is used to drive the positioning block to move in the front and rear directions, so that the positioning block can sequentially abut against the lug plate, short side plate and long side plate of the metal plate, and the bending areas of the lug plate, short side plate and long side plate of the metal plate are aligned with the upper mold in sequence.

3. The bending machine according to claim 1, characterized in that: The lower mold is provided with a guide through hole and a guide strip hole, and the guide through hole and the guide strip hole are both parallel to the left and right directions. The guide strip hole is opened on the upper surface of the lower mold and is connected with the guide through hole. The first limiting mechanism includes a first limiting column, and the second limiting mechanism includes a second limiting column. The first limiting column and the second limiting column are both parallel to the up and down directions. The lower ends of the first limiting column and the second limiting column are both penetrated into the guide strip hole and the guide through hole, and the upper ends of the first limiting column and the second limiting column extend out of the upper surface of the lower mold. The lower ends of the first limiting column and the second limiting column are both connected to the output end of the first linear drive mechanism, and the gap between the first limiting column and the second limiting column is used for the lug plate, short side plate or long side plate of the metal plate to pass through.

4. The bending machine according to claim 3, characterized in that: The cross-section of the guide through hole is square, and the first linear drive mechanism includes a screw, a motor, a first nut and a second nut. The screw is parallel to the left and right directions and is arranged in the guide through hole. A first external thread and a second external thread are provided on the outer wall of the screw. The first external thread and the second external thread have opposite rotation directions. The first nut and the second nut are both arranged in the guide through hole, and the first nut and the second nut are both abutted against the inner wall of the guide through hole. The first nut is threadedly connected to the first external thread, the first nut is connected to the lower end of the first limiting column, the second nut is threadedly connected to the second external thread, and the second nut is connected to the lower end of the second limiting column. The output end of the motor is connected to one end of the screw, and the motor is used to drive the screw to rotate so that the first nut and the second nut respectively drive the first limiting column and the second limiting column to approach or move away from each other.

5. The bending machine according to claim 1, characterized in that: It also includes a lamp, which is arranged on the frame and is used to illuminate the gap between the first limiting mechanism and the second limiting mechanism.

6. The bending machine according to claim 1, characterized in that: The upper die includes a forming block, and the lower die is provided with a forming groove, into which the forming block can extend, and the forming block is used to extrude the metal plate, and the inner wall of the forming groove is used to abut against the metal plate, so that the inner wall of the forming groove and the forming block can bend the metal plate.

7. The bending machine according to claim 6, characterized in that: It also includes a first heating mechanism and a second heating mechanism. The first heating mechanism is used to heat the forming block so that the forming block transfers heat to the bending zone of the metal plate and increases the temperature of the bending zone of the metal plate. The second heating mechanism is used to heat the bottom wall of the forming groove so that the bottom wall of the forming groove transfers heat to the bending zone of the metal plate.

8. The bending machine according to claim 7, characterized in that: The first heating mechanism includes a first heating rod, which is arranged on the forming block and is used to generate heat to increase the temperature of the forming block. The second heating mechanism includes a second heating rod, a second mounting hole is opened on the lower mold, and the second mounting hole is arranged below the bottom wall of the forming groove. The second heating rod is inserted into the second mounting hole and is used to generate heat to increase the temperature of the bottom wall of the forming groove.

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