Automatic quick mold change device for bending center

Abstract

The present invention discloses an automatic rapid mold changing device for a bending center, which is characterized by comprising an upper mold clamping device, a base plate and an automatic mold changing device; the upper mold clamping device comprises a clamping tool holder and a clamping assembly arranged on the front end surface of the lower part of the clamping tool holder; the base plate is installed on the front end surface of the upper part of the upper mold clamping device; the automatic mold changing device is slidably connected with the front end surface of the base plate. The present invention is installed in the front bending area of ​​the bending center. When the mold needs to be disassembled, the driving motor moves the driving base to the front of the mold to be disassembled, and the mechanical arm is started to move to the front of the mold to be disassembled; the mechanical arm cylinder is controlled to disassemble the mold, and the mold can be installed or removed horizontally, and the unsuitable mold can be moved to the two ends of the clamping device for easy storage of the mold, which is convenient for use and easy to manage the mold; after disassembly, the present invention quickly resets, the tool change speed is fast, time and labor are saved, and the processing efficiency of the equipment is improved.

Description

Technical Field

[0001] The invention relates to a bending center, in particular to an automatic rapid die changing device installed in a front bending area of ​​the bending center. Background Art

[0002] A bending center is a device for bending metal sheets. It plays an important role in the sheet metal processing industry. Improving the processing efficiency of the bending center in actual production helps to increase production quantity and quality, reduce production costs, and improve corporate competitiveness.

[0003] How to quickly complete the disassembly and assembly of molds (tool change) is the key to improving the processing efficiency of the bending center. The existing equipment mainly uses manual tool change, and the tool change process is cumbersome. Especially when processing some multi-variety and small-batch products, it is often necessary to frequently change molds (tools), thereby reducing the processing efficiency of the equipment. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art and provide an automatic rapid mold changing device for a bending center.

[0005] The technical solution of the present invention is:

[0006] An automated rapid die-changing device for a bending center, characterized in that it comprises an upper die clamping device, a base plate and an automatic die-changing device; the upper die clamping device comprises a clamping tool holder and a clamping assembly arranged on the front end surface of the lower part of the clamping tool holder; the base plate is installed on the front end surface of the upper part of the upper die clamping device; the automatic die-changing device is slidably connected to the front end surface of the base plate.

[0007] Preferably, the automatic mold changing device comprises a driving base plate, a driving motor, a cylinder, a connecting plate, and a mechanical arm;

[0008] The driving motor is mounted on the driving base plate; the cylinder is located below the driving motor; a guide rail is provided at the bottom of the driving base plate, and the connecting plate is slidably connected to the guide rail via a slider; the piston rod of the cylinder is connected to the connecting plate to drive it to move on the guide rail; the robotic arm is provided at the bottom of the connecting plate.

[0009] Preferably, the mechanical arm comprises an arm mounting plate, a positioning pin, an arm cylinder, and a claw linked to the arm cylinder;

[0010] The arm mounting plate is fixed to the bottom of the connecting plate; the clamping claw is pivotally connected to one end of the arm mounting plate, and the tail end of the arm cylinder is pivotally connected to the other end of the arm mounting plate; the positioning pin is arranged on one end surface of the arm mounting plate, above the clamping claw.

[0011] Preferably, the robotic arm comprises an arm mounting plate, a positioning pin and an expansion pin; the arm mounting plate is fixed to the bottom of the connecting plate, the positioning pin is installed on one end surface of the arm mounting plate, and the expansion pin is arranged below the positioning pin.

[0012] Preferably, a pair of guide rails are provided on the front end surface of the bottom plate, a gear bar is provided between the pair of guide rails, and a gear meshing with the gear bar is provided on the transmission shaft of the drive motor.

[0013] Preferably, the automatic mold changing device comprises a horizontal moving slide, a lifting slide, a lifting cylinder, a horizontal cylinder, a connecting plate and a mechanical arm;

[0014] A vertical guide rail is provided on one side of the horizontal moving slide, and the lifting slide is connected to the vertical guide rail through a slider; the lifting cylinder is arranged in the lifting slide, and the piston rod of the lifting cylinder is connected to the top of the horizontal moving slide;

[0015] The horizontal cylinder is arranged on the lifting slide; a guide rail is arranged at the bottom of the lifting slide, the connecting plate is slidably connected to the guide rail through a slider, and the piston rod of the horizontal cylinder is connected to the connecting plate to drive it to move on the guide rail; the robotic arm is arranged at the bottom of the connecting plate.

[0016] Preferably, the mechanical arm comprises an arm mounting plate, a positioning pin, an arm cylinder, and a claw linked to the arm cylinder;

[0017] The arm mounting plate is fixed to the bottom of the connecting plate; the clamping claw is pivotally connected to one end of the arm mounting plate, and the tail end of the arm cylinder is pivotally connected to the other end of the arm mounting plate; the positioning pin is arranged on one end surface of the arm mounting plate, above the clamping claw.

[0018] Preferably, a pair of guide rails are provided on the front end surface of the bottom plate, and a slider slidably connected to the guide rails is provided on the other side surface of the horizontal movable slide;

[0019] A ball screw is arranged between the guide rails, the horizontal movable slide is connected to the ball screw, and the horizontal movable slide is driven by the ball screw to move back and forth on the guide rails.

[0020] Preferably, the clamping assembly comprises a swing arm support, an upper mold plate and a clamping element;

[0021] The swing arm supports are fixedly arranged on the front end surface of the clamping tool holder in a group of at least two; the upper mold plate is pivotally connected between the two swing arm supports through a pin shaft;

[0022] Torsion springs are sleeved on both ends of the pin shaft, one end of the free end of the torsion spring is connected to the swing arm support, and the other end is connected to the upper mold plate;

[0023] A mounting groove is provided at a position where the front end surface of the clamping tool holder is opposite to the upper mold pressing plate, one end of the clamping element is placed in the mounting groove, and the other end is connected to the upper end of the upper mold pressing plate.

[0024] Preferably, the automatic mold changing device is provided with a sensor for identifying the specifications and positions of the molds.

[0025] The present invention is installed in the front bending area of ​​the bending center. When the mold needs to be disassembled, the driving motor is used to move the driving base to the front of the mold to be disassembled, and the mechanical arm is started to move to the front of the mold to be disassembled; the mechanical arm cylinder is controlled to disassemble the mold, the mold can be installed or removed horizontally, and the unsuitable mold is moved to the two ends of the clamping device for easy storage of the mold, which is convenient for use and easy to manage the mold; after disassembly, the present invention is quickly reset, the tool change speed is fast, time and labor are saved, and the processing efficiency of the equipment is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A three-dimensional diagram of the present invention

[0027] Figure 2 A three-dimensional diagram of the upper mold clamping device of the present invention installing the mold

[0028] Figure 3 A schematic diagram of the partial structure of the mold installed in the upper mold clamping device of the present invention

[0029] Figure 4 A schematic diagram of a partial disassembly of the upper die clamping device of the present invention

[0030] Figure 5 A side view of the automatic mold changing device in Example 1 of the present invention

[0031] Figure 6 A three-dimensional diagram of the automatic mold changing device in Example 1 of the present invention

[0032] Figure 7 A front view of the automatic mold changing device in Example 1 of the present invention

[0033] Figure 8 The rear view of the automatic mold changing device in Example 1 of the present invention

[0034] Fig. 9 Schematic diagram of the structure of the automatic mold changing device connected to the bending center bottom plate in Example 1 of the present invention

[0035] Fig.10This is a schematic diagram of the structure of the disassembly and assembly mold of the automatic mold changing device in Example 1 of the present invention.

[0036] Fig.11 A side view of the automatic mold changing device in Example 2 of the present invention

[0037] Fig.12 A three-dimensional diagram of the automatic mold changing device in Example 2 of the present invention

[0038] Fig.13 A front view of the automatic mold changing device in Example 2 of the present invention

[0039] Fig.14 The rear view of the automatic mold changing device in Example 2 of the present invention

[0040] Fig.15 Schematic diagram of the structure of the automatic mold changing device connected to the bending center bottom plate in Example 2 of the present invention

[0041] Fig.16 This is a schematic diagram of the structure of the disassembly and assembly mold of the automatic mold changing device in Example 2 of the present invention.

[0042] Fig.17 A side view of the automatic mold changing device in Example 3 of the present invention

[0043] Fig.18 A three-dimensional diagram of the automatic mold changing device in Example 3 of the present invention

[0044] Fig.19 A front view of the automatic mold changing device in Example 3 of the present invention

[0045] Fig. 20 The rear view of the automatic mold changing device in Example 3 of the present invention

[0046] Fig.21 Schematic diagram of the structure of the automatic mold changing device connected to the bending center bottom plate in Example 3 of the present invention

[0047] Fig. 22 This is a schematic diagram of the structure of the disassembly and assembly mold of the automatic mold changing device in Example 3 of the present invention. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two, but does not exclude the inclusion of at least one.

[0050] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0051] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0052] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0053] The present invention has three different implementation modes, which are as follows:

[0054] Example 1

[0055] like Figures 1 to 4 As shown, an automatic rapid mold changing device for a bending center of the present invention is characterized by comprising an upper mold clamping device 100, a bottom plate 200, and an automatic mold changing device 300.

[0056] like Figures 2 to 3 As shown, the upper mold clamping device 100 includes a clamping tool holder 101 and a clamping assembly arranged on the front end surface of the lower part of the clamping tool holder 101; the base plate 200 is installed on the front end surface of the upper part of the clamping tool holder 101; and the automatic mold changing device 300 is slidably connected to the front end surface of the base plate 200.

[0057] The clamping assembly includes a swing arm support 102, an upper mold plate 103 and a clamping element 104. The clamping element 104 in this embodiment is a hydraulic cylinder, which can be replaced with a pneumatic cylinder as needed to control the tightening and loosening of the upper mold plate 1033.

[0058] A plurality of mounting holes 1010 connected to the bending center are provided on the top of the clamping tool holder 101; a notch is provided on the front end face of the clamping tool holder 101, and the notch is arranged transversely along the length direction of the front end face of the clamping tool holder 101, and the strip-shaped notch is located below the front end face. The swing arm supports 102 in this embodiment are grouped in two and fixed side by side in the notch. The number of the swing arm supports 102 is determined according to the number of molds to be clamped, such as Figure 3 Schematic diagram of the structure of multiple swing arm supports 102 in this embodiment.

[0059] The upper part of the swing arm support 102 in this embodiment is provided with a support fixing hole 1021 connected to the clamping tool holder 101, and a boss 1022 pivotally connected to the upper mold plate 103 is provided below the support fixing hole 1021, and the boss 1022 begins with a pivot hole; a snap-on socket 1024 for clamping the free end of the torsion spring 1023 is provided on one side of the boss 1022.

[0060] The upper mold pressing plate 103 is pivotally connected to the swing arm support 102 through the pivot hole of the boss 1022 via the pin 1031, so that the upper mold pressing plate 102 can perform a clamping movement at a certain angle around the boss 1022. Torsion springs 1023 are sleeved on both ends of the pin 1031, one end of the free end of the torsion spring 1023 is clamped into the bayonet 1024 of the swing arm support 102, and the other end of the torsion spring 1023 is connected to the upper mold pressing plate 103. This structure can keep the upper mold pressing plate 102 in a loose state to avoid collision when replacing the mold 7.

[0061] A mounting groove is provided at a position opposite to the upper mold pressing plate 103 on the front end surface of the clamping tool holder 101. One end of the hydraulic cylinder 104 is placed in the mounting groove, and the other end is connected to the upper end of the upper mold pressing plate 103. By controlling the action of the hydraulic cylinder 104, the clamping action of the upper mold pressing plate 103 can be realized, so as to realize the clamping and loosening action of the bending mold, thereby realizing the upper mold and replacement action of the mold.

[0062] The lower end surface of the clamping tool holder 101 in this embodiment is consistent with the outer contour of the upper end of the mold, so that the mold can be directly inserted under the clamping tool holder 101.

[0063] When the upper knife is being cut, the present invention controls the tightening and loosening action of the upper mold pressing plate through the hydraulic cylinder to realize the whole action, has fast response speed and stable performance, is suitable for the process of clamping the mold in the bending center, solves the problem of time-consuming and labor-intensive manual mold clamping, saves time and labor, and improves work efficiency; at the same time, idle upper knife molds can be stored at both ends of the clamping tool holder, which facilitates the management of the mold.

[0064] like Figures 5 to 10 As shown, the automatic mold changing device 300 in this embodiment includes a driving base 1, a driving motor 2, a cylinder 3, a connecting plate 4, and a robotic arm 5.

[0065] like Fig. 9 In this embodiment, the driving motor 2 is installed on the upper part of the driving base 1, and is used to drive the device to move back and forth on the bending center base plate 200. A slider 11 is provided on the other side of the driving base 1, which is slidably connected to the guide rail 201 of the bending center base plate 200.

[0066] The driving motor 2 is provided with a reducer 21 , and a gear 22 meshing with a bottom plate rack 202 is provided on a transmission shaft of the reducer 21 . The driving base 1 is provided with a sensor 12 for identifying the specification and position of the mold 7 .

[0067] The cylinder 3 in this embodiment is located below the driving motor 2; a guide rail 6 is provided at the bottom of the driving base 1, and the connecting plate 4 is slidably connected to the guide rail 6 through a slider 70; the piston rod of the cylinder 3 is connected to the connecting plate 4, and the cylinder 3 can drive the connecting plate 4 to reciprocate on the guide rail 6, so as to adjust the position of the robot arm 5 in front of the mold.

[0068] Because the robot arm 5 is arranged at the bottom of the connecting plate 4, the movement of the connecting plate 4 synchronously drives the movement of the robot arm 5, thereby realizing the disassembly and installation of the mold by the robot arm 5, thereby achieving the purpose of accurately and quickly replacing and installing the mold.

[0069] To further describe the present invention, the specific structure of the robot arm 5 of this embodiment is as follows:

[0070] like Figure 5 As shown, the mechanical arm 5 includes an arm mounting plate 51, a positioning pin 52, an arm cylinder 53, and a rotating swing arm 54 linked to the arm cylinder 53. The positioning pin 52 and the rotating swing arm 54 in this embodiment are matched with corresponding molds, and different types of molds are matched with positioning pins 52 and rotating swing arms 54 of different structures to achieve the effect of rapid replacement and installation.

[0071] Specifically, the arm mounting plate 51 is fixed to the bottom of the connecting plate 4 and is integrated therewith into an integral structure, so that when the cylinder 3 drives the connecting plate 4, the robotic arm 5 can be moved synchronously therewith to the front of the mold to facilitate subsequent actions.

[0072] The rotating swing arm 54 in this embodiment is pivoted to one end of the arm mounting plate 51 (pivoted to the left end of the arm mounting plate 51 in this embodiment) to achieve a certain angle of rotation. The tail end of the arm cylinder 53 is pivoted to the other end of the arm mounting plate 51 (pivoted to the right end of the arm mounting plate 51 in this embodiment); the arm cylinder 53 is driven to drive the rotating swing arm 54 to rotate and position at a certain angle, that is, to extend the positioning pin 52 and the rotating swing arm 54 to the position that matches the mold to be disassembled or installed, so as to achieve rapid replacement and installation of the mold.

[0073] The positioning pin 52 in this embodiment is arranged on the left end surface of the arm mounting plate 51 of the arm mounting plate 51, located above the rotating swing arm 54, and is used to be inserted into the pin hole of the mold for positioning.

[0074] The above is an embodiment of a single cylinder 3, a single connecting plate 4, and a single robotic arm 5, that is, the structure is more suitable for replacing and installing a single mold or a mold of smaller size. The present invention can also be adapted to different styles of molds by setting multiple cylinders 3, multiple connecting plates 4, and multiple robotic arms 5. The following is a further explanation of the structure of two cylinders 3, two connecting plates 4, and two robotic arms 5 in this embodiment. If the mold is larger, the above components can also be added.

[0075] like Figure 6 to Figure 7 As shown, the cylinder 3 of this embodiment includes a first cylinder 31 and a second cylinder 32, the connecting plate 4 includes a first connecting plate 41 and a second connecting plate 42, and the guide rail 6 includes a first guide rail 61 and a second guide rail 62; the first cylinder 31 and the second cylinder 32 are arranged in parallel on the upper surface of the horizontal support plate of the driving base 1 (11 is deleted), and are located below the driving motor 2; the first connecting plate 41 and the second connecting plate 42 are respectively slidably connected to the first guide rail 61 and the second guide rail 62; the piston rods of the first cylinder 31 and the second cylinder 32 are respectively connected to the first connecting plate 41 and the second connecting plate 42.

[0076] like Figure 8 As shown, the robotic arm 5 of this embodiment includes a first robotic arm 501 and a second robotic arm 502 , and the first robotic arm 501 and the second robotic arm 502 are respectively installed at the bottom of the first connecting plate 41 and the second connecting plate 42 .

[0077] like Fig. 9 and Fig.10As shown, when the mold 7 is being disassembled and assembled, the driving motor 2 is started to slide the present invention to the front of the mold 7 to be disassembled, and the first cylinder 31 and the second cylinder 32 are started to drive the first connecting plate 41 and the second connecting plate 42 to move the first robot arm 501 and the second robot arm 502 to the front of the mold to be disassembled; the positioning pin 52 is inserted into the positioning pin 71 of the mold to be disassembled, and at the same time, the arm cylinder 53 is controlled to extend the rotating swing arm 54 into the disassembly groove of the disassembly mold, and then the upper mold plate at the bending center is lifted, and the mold can be installed or removed horizontally at this time.

[0078] The present invention can also use a single robotic arm alone or two robotic arms at the same time; when a shorter mold (a single mold or a single-hole mold) needs to be picked up and placed, the driving base 1 moves to a specified position, and after the first cylinder 31 retracts, the positioning pin 52 is inserted into the pin hole 71 corresponding to the mold, the arm cylinder 53 retracts, and the first rotating swing arm 54 presses down the pin shaft 72 of the mold, and the first cylinder 31 extends to take out the mold; the driving base 1 moves to another position, and after the first cylinder 31 retracts, the arm cylinder 53 extends, and under the action of the spring, the end of the pin shaft 72 is pushed into the corresponding slot of the clamping tool holder 101, and the first cylinder 31 extends to put down the mold for storage or installation.

[0079] For a wider mold (the mold has at least two pin holes), the mold can be taken and placed by the simultaneous operation of the first cylinder 31 and the second cylinder 32.

[0080] When the present invention needs to disassemble the mold, the driving motor is used to move the driving base to the front of the mold to be disassembled, and the cylinder is started to move the mechanical arm to the front of the mold to be disassembled; the positioning pin is inserted into the pin hole of the mold to be disassembled, and the arm cylinder is controlled to extend the rotating swing arm into the disassembly groove of the disassembly mold, and then the upper mold pressing plate of the bending center is lifted, and the mold can be installed or removed horizontally at this time; after disassembly, the present invention is quickly reset, the tool changing speed is fast, time and labor are saved, and the processing efficiency of the equipment is improved.

[0081] Example 2

[0082] like Figures 1 to 4 As shown, an automatic rapid mold changing device for a bending center of the present invention is characterized by comprising an upper mold clamping device 100, a bottom plate 200, and an automatic mold changing device 300.

[0083] The upper mold clamping device 100 includes a clamping tool holder 101 and a clamping assembly arranged on the front end surface of the lower part of the clamping tool holder 101; the base plate 200 is installed on the front end surface of the upper part of the clamping tool holder 101; and the automatic mold changing device 300 is slidably connected to the front end surface of the base plate 200.

[0084] The clamping assembly includes a swing arm support 102, an upper mold plate 103 and a clamping element 104. The clamping element 104 in this embodiment is a hydraulic cylinder, which can be replaced with a pneumatic cylinder as needed to control the tightening and loosening of the upper mold plate 1033.

[0085] A plurality of mounting holes 1010 connected to the bending center are provided on the top of the clamping tool holder 101; a notch is provided on the front end face of the clamping tool holder 101, and the notch is arranged transversely along the length direction of the front end face of the clamping tool holder 101, and the strip-shaped notch is located below the front end face. The swing arm supports 102 in this embodiment are grouped in two and fixed side by side in the notch. The number of the swing arm supports 102 is determined according to the number of molds to be clamped, such as Figure 3 Schematic diagram of the structure of multiple swing arm supports 102 in this embodiment.

[0086] The upper part of the swing arm support 102 in this embodiment is provided with a support fixing hole 1021 connected to the clamping tool holder 101, and a boss 1022 pivotally connected to the upper mold plate 103 is provided below the support fixing hole 1021, and the boss 1022 begins with a pivot hole; a snap-on socket 1024 for clamping the free end of the torsion spring 1023 is provided on one side of the boss 1022.

[0087] The upper mold pressing plate 103 is pivotally connected to the swing arm support 102 through the pivot hole of the boss 1022 via the pin 1031, so that the upper mold pressing plate 102 can perform a clamping movement at a certain angle around the boss 1022. Torsion springs 1023 are sleeved on both ends of the pin 1031, one end of the free end of the torsion spring 1023 is clamped into the bayonet 1024 of the swing arm support 102, and the other end of the torsion spring 1023 is connected to the upper mold pressing plate 103. This structure can keep the upper mold pressing plate 102 in a loose state to avoid collision when replacing the mold 7.

[0088] A mounting groove is provided at a position opposite to the upper mold pressing plate 103 on the front end surface of the clamping tool holder 101. One end of the hydraulic cylinder 104 is placed in the mounting groove, and the other end is connected to the upper end of the upper mold pressing plate 103. By controlling the action of the hydraulic cylinder 104, the clamping action of the upper mold pressing plate 103 can be realized, so as to realize the clamping and loosening action of the bending mold, thereby realizing the upper mold and replacement action of the mold.

[0089] The lower end surface of the clamping tool holder 101 in this embodiment is consistent with the outer contour of the upper end of the mold, so that the mold can be directly inserted under the clamping tool holder 101.

[0090] When the upper knife is being cut, the present invention controls the tightening and loosening action of the upper mold pressing plate through the hydraulic cylinder to realize the whole action, has fast response speed and stable performance, is suitable for the process of clamping the mold in the bending center, solves the problem of time-consuming and labor-intensive manual mold clamping, saves time and labor, and improves work efficiency; at the same time, idle upper knife molds can be stored at both ends of the clamping tool holder, which facilitates the management of the mold.

[0091] like Figures 11 to 16 As shown, the automatic mold changing device 300 in this embodiment includes a driving base 1, a driving motor 2, a cylinder 3, a connecting plate 4, and a robotic arm 5.

[0092] like Fig.15 As shown, in this embodiment, the driving motor 2 is installed on the upper part of the driving base 1, and is used to drive the device to move back and forth on the bending center base plate 200. A slider 11 is provided on the other side of the driving base 1, which is slidably connected to the guide rail 201 of the bending center base plate 200.

[0093] The transmission shaft of the driving motor 2 is provided with a gear 22 meshing with the bottom plate rack 202, and the driving base 1 is provided with a sensor 12 for identifying the specification and position of the mold.

[0094] The cylinder 3 in this embodiment is located below the driving motor 2; a guide rail 6 is provided at the bottom of the driving base 1, and the connecting plate 4 is slidably connected to the guide rail 6 through a slider 7; the piston rod of the cylinder 3 is connected to the connecting plate 4, and the cylinder 3 can drive the connecting plate 4 to reciprocate on the guide rail 6, so as to adjust the position of the robot arm 5 in front of the mold.

[0095] Because the robot arm 5 is arranged at the bottom of the connecting plate 4, the movement of the connecting plate 4 synchronously drives the movement of the robot arm 5, thereby realizing the disassembly and installation of the mold by the robot arm 5, thereby achieving the purpose of accurately and quickly replacing and installing the mold.

[0096] To further describe the present invention, the specific structure of the robot arm 5 of this embodiment is as follows:

[0097] The robotic arm 5 includes an arm mounting plate 51, a positioning pin 52 and an expansion pin 53; the arm mounting plate 51 is fixed to the bottom of the connecting plate 4, the positioning pin 52 is installed on the left end surface of the arm mounting plate 51, and the expansion pin 53 is arranged below the positioning pin 52, and the two are located on the same vertical line. The positioning pin 52 and expansion pin 53 in this embodiment are matched with the corresponding positioning holes and pin holes on the mold. By matching different models of molds with positioning pins 52 and expansion pins 53 of different structures, the effect of quickly replacing and installing different molds can be achieved.

[0098] Specifically, the arm mounting plate 51 is fixed to the bottom of the connecting plate 4 and is integrated therewith into an integral structure, so that when the cylinder 3 drives the connecting plate 4, the robotic arm 5 can be moved synchronously therewith to the front of the mold to facilitate subsequent actions.

[0099] The above is an embodiment of a single cylinder 3, a single connecting plate 4, and a single robotic arm 5, that is, the structure is more suitable for replacing and installing a single mold or a mold of smaller size. The present invention can also be adapted to different styles of molds by setting multiple cylinders 3, multiple connecting plates 4, and multiple robotic arms 5. The following is a further explanation of the structure of two cylinders 3, two connecting plates 4, and two robotic arms 5 in this embodiment. If the mold is larger, the above components can also be added.

[0100] like Figure 12 to Figure 14 As shown, the cylinder 3 of this embodiment includes a first cylinder 31 and a second cylinder 32, the connecting plate 4 includes a first connecting plate 41 and a second connecting plate 42, and the guide rail 6 includes a first guide rail 61 and a second guide rail 62; the first cylinder 31 and the second cylinder 32 are arranged in parallel on the upper surface of the horizontal support plate 11 of the driving base 1, and are located below the driving motor 2; the first connecting plate 41 and the second connecting plate 42 are respectively slidably connected to the first guide rail 61 and the second guide rail 62; the piston rods of the first cylinder 31 and the second cylinder 32 are respectively connected to the first connecting plate 41 and the second connecting plate 42.

[0101] The robotic arm 5 of this embodiment includes a first robotic arm 501 and a second robotic arm 502. The first robotic arm 501 and the second robotic arm 502 are respectively installed at the bottom of the first connecting plate 41 and the second connecting plate 42. Positioning pins 52 and expansion pins 53 are fixed under the first connecting plate 41 and the second connecting plate 42.

[0102] like Fig.15 and Fig.16 A cylinder piston rod 71 and a piston rod torsion spring 72 are installed at the right end of the mold 7. The piston rod torsion spring 72 pushes the cylinder piston rod 71 into the groove corresponding to the clamping tool holder 101 to ensure the fixation of the mold 7.

[0103] When the mold needs to be removed, the positioning pin 52 and the expansion pin 53 are pushed into the corresponding positioning and pin holes on the mold. The steel ball at the end of the expansion pin 53 protrudes outward under the action of compressed air, thereby fixing the mold. At the same time, compressed air enters the mold through the air hole in the middle of the expansion pin 53, pushing the cylinder piston rod 71 downward, and the first cylinder 31 and the second cylinder 32 extend to drive the first robot arm 501 and the second robot arm 502, thereby taking out the mold. The same is true for installing the mold.

[0104] When the present invention needs to disassemble the mold, the driving motor is used to move the driving base to the front of the mold to be disassembled, and the cylinder is started to move the mechanical arm to the front of the mold to be disassembled; the positioning pin and the expansion pin are inserted into the pin hole of the mold to be disassembled, and the mechanical arm is controlled at the same time, and then the upper mold pressing plate of the bending center is lifted, and the mold can be installed or removed horizontally at this time; after disassembly and assembly, the present invention is quickly reset, the tool changing speed is fast, time and labor are saved, and the processing efficiency of the equipment is improved.

[0105] Example 3

[0106] like Figures 1 to 4 As shown, an automatic rapid mold changing device for a bending center of the present invention is characterized by comprising an upper mold clamping device 100, a bottom plate 200, and an automatic mold changing device 300.

[0107] The upper mold clamping device 100 includes a clamping tool holder 101 and a clamping assembly arranged on the front end surface of the lower part of the clamping tool holder 101; the base plate 200 is installed on the front end surface of the upper part of the clamping tool holder 101; and the automatic mold changing device 300 is slidably connected to the front end surface of the base plate 200.

[0108] The clamping assembly includes a swing arm support 102, an upper mold plate 103 and a clamping element 104. The clamping element 104 in this embodiment is a hydraulic cylinder, which can be replaced with a pneumatic cylinder as needed to control the tightening and loosening of the upper mold plate 1033.

[0109] A plurality of mounting holes 1010 connected to the bending center are provided on the top of the clamping tool holder 101; a notch is provided on the front end face of the clamping tool holder 101, and the notch is arranged transversely along the length direction of the front end face of the clamping tool holder 101, and the strip-shaped notch is located below the front end face. The swing arm supports 102 in this embodiment are grouped in two and fixed side by side in the notch. The number of the swing arm supports 102 is determined according to the number of molds to be clamped, such as Figure 3 It is a schematic structural diagram of a plurality of swing arm supports 102 in this embodiment.

[0110] The upper part of the swing arm support 102 in this embodiment is provided with a support fixing hole 1021 connected to the clamping tool holder 101, and a boss 1022 pivotally connected to the upper mold plate 103 is provided below the support fixing hole 1021, and the boss 1022 begins with a pivot hole; a snap-on socket 1024 for clamping the free end of the torsion spring 1023 is provided on one side of the boss 1022.

[0111] The upper mold pressing plate 103 is pivotally connected to the swing arm support 102 through the pivot hole of the boss 1022 via the pin 1031, so that the upper mold pressing plate 102 can perform a clamping movement at a certain angle around the boss 1022. Torsion springs 1023 are sleeved on both ends of the pin 1031, one end of the free end of the torsion spring 1023 is clamped into the bayonet 1024 of the swing arm support 102, and the other end of the torsion spring 1023 is connected to the upper mold pressing plate 103. This structure can keep the upper mold pressing plate 102 in a loose state to avoid collision when replacing the mold 7.

[0112] A mounting groove is provided at a position opposite to the upper mold pressing plate 103 on the front end surface of the clamping tool holder 101. One end of the hydraulic cylinder 104 is placed in the mounting groove, and the other end is connected to the upper end of the upper mold pressing plate 103. By controlling the action of the hydraulic cylinder 104, the clamping action of the upper mold pressing plate 103 can be realized, so as to realize the clamping and loosening action of the bending mold, thereby realizing the upper mold and replacement action of the mold.

[0113] The lower end surface of the clamping tool holder 101 in this embodiment is consistent with the outer contour of the upper end of the mold, so that the mold can be directly inserted under the clamping tool holder 101.

[0114] When the upper knife is being cut, the present invention controls the tightening and loosening action of the upper mold pressing plate through the hydraulic cylinder to realize the whole action, has fast response speed and stable performance, is suitable for the process of clamping the mold in the bending center, solves the problem of time-consuming and labor-intensive manual mold clamping, saves time and labor, and improves work efficiency; at the same time, idle upper knife molds can be stored at both ends of the clamping tool holder, which facilitates the management of the mold.

[0115] like Figures 17 to 22 As shown, the automatic mold changing device 300 includes a horizontal moving slide 1, a lifting slide 2, a lifting cylinder 3, a horizontal cylinder 4, a connecting plate 5 and a robotic arm 6.

[0116] In this embodiment, a vertical guide rail 11 is provided on one side of the horizontal movable slide 1, and the lifting slide 2 is slidably connected to the vertical guide rail 11 through a slider 20. The lifting slide 2 can slide up and down on the horizontal movable slide 1 by driving the guide rail 11, the slider 20 and the lifting cylinder 3; a sensor 13 for identifying the specifications and position of the mold 7 is provided at the bottom of the horizontal movable slide 1.

[0117] The lifting cylinder 3 is arranged in the lifting slide 2, and the piston rod of the lifting cylinder 3 is connected to the platform extending from the top of the horizontal moving slide 1. Starting the lifting cylinder 3 can drive the lifting slide 2 to slide up and down.

[0118] The horizontal cylinder 4 is arranged on one side of the lower part of the lifting slide 2; a guide rail 21 is provided at the bottom of the lifting slide 2, the connecting plate 5 is slidably connected to the guide rail 21 through a slider 22, the horizontal cylinder 4 is connected to the connecting plate, and the piston rod of the horizontal cylinder is connected to the lifting slide 2, and it is driven to move on the guide rail 21 by the extension and retraction of the horizontal cylinder piston rod.

[0119] The mechanical arm 6 is disposed at the bottom of the connecting plate 5 , and the mechanical arm 6 and the connecting plate 5 move back and forth synchronously under the drive of the horizontal cylinder 4 .

[0120] like Fig.17 As shown, the robotic arm 6 in this embodiment includes an arm mounting plate 61, a positioning pin 62, an arm cylinder 63, and a rotating swing arm 64 linked to the arm cylinder 63; the arm mounting plate 61 is fixed to the bottom of the connecting plate 5 and the two can move synchronously.

[0121] The rotating swing arm 64 is pivotally connected to one end of the arm mounting plate 61, and the tail end of the arm cylinder 63 is pivotally connected to the other end of the arm mounting plate 61; the positioning pin 62 is arranged on one end surface of the arm mounting plate 61, located above the rotating swing arm 64, and the extension or retraction of the arm cylinder 63 can synchronously control the corresponding action of the rotating swing arm 64.

[0122] like Fig.21 As shown, a pair of guide rails 201 are provided on the front end surface of the bending center bottom plate 200 , and a slider 14 slidably connected to the guide rails 201 is provided on the other side surface of the horizontal moving slide 1 .

[0123] Preferably, a ball screw 202 is provided between the guide rails 201 , and the ball screw 202 is driven by a driving motor 203 on one side; the horizontal movable slide 1 is connected to the ball screw 202 , and the ball screw 202 drives the horizontal movable slide 1 to reciprocate on the guide rails 201 .

[0124] The connecting plate 5 can be driven to move back and forth on the guide rail 22 by the horizontal cylinder 4 , so as to adjust the position of the robot arm 6 in front of the mold 7 .

[0125] Because the robot arm 6 is arranged at the bottom of the connecting plate 5, the movement of the connecting plate 5 synchronously drives the movement of the robot arm 5, and then the robot arm 6 realizes the disassembly and installation of the mold 7, thereby achieving the purpose of accurately and quickly replacing and installing the mold 7.

[0126] The positioning pins 62 and the rotating swing arms 64 in this embodiment are matched with the corresponding molds 7. Different types of molds are matched with positioning pins 62 and rotating swing arms 64 of different structures to achieve the effect of rapid replacement and installation.

[0127] Specifically, the arm mounting plate 61 is fixed to the bottom of the connecting plate 5 and is integrated therewith into an integral structure, so that when the horizontal cylinder 4 drives the connecting plate 5, the robotic arm 6 can be moved synchronously therewith to the front of the mold 7 for subsequent disassembly and assembly.

[0128] The rotating swing arm 64 in this embodiment is pivoted to one end of the arm mounting plate 61 (pivoted to the left end of the arm mounting plate 61 in this embodiment) to achieve a certain angle of rotation. The tail end of the arm cylinder 63 is pivoted to the other end of the arm mounting plate 61 (pivoted to the right end of the arm mounting plate 61 in this embodiment); the arm cylinder 63 is driven to drive the rotating swing arm 64 to perform a certain angle of rotation and positioning, that is, the positioning pin 62 and the rotating swing arm 64 are extended to the position that matches with the mold to be disassembled or installed, so as to achieve rapid disassembly and assembly of the mold 7.

[0129] The positioning pin 62 in this embodiment is arranged on the left end surface of the arm mounting plate 61 of the arm mounting plate 61, located above the rotating swing arm 64, and is used to be inserted into the pin hole of the mold for positioning.

[0130] The above is an embodiment of a single horizontal cylinder 4 and a single robotic arm 6, that is, the structure for disassembly and assembly of a single mold or a mold of smaller size is more suitable. The present invention can also be adapted to different styles of molds by setting multiple horizontal cylinders 4, multiple connecting plates 5, and multiple robotic arms 6. The following is a further explanation of the structure of two horizontal cylinders 4 and two robotic arms 6 in this embodiment. If the mold is larger, the above components can also be added.

[0131] The connecting plate 5 of the present embodiment is an integral structure, and can also be established as two independent connecting plates as needed; the horizontal cylinder 4 includes a first cylinder 41 and a second cylinder 42, and the first cylinder 41 and the second cylinder 42 are symmetrically arranged on both sides of the connecting plate 5, and the piston rods of the first cylinder 41 and the second cylinder 42 are respectively connected to the two ends of the lifting slide 2.

[0132] like Figures 18 to 20 As shown, the mechanical arm 6 of this embodiment includes a first mechanical arm 601 and a second mechanical arm 602 , and the first mechanical arm 601 and the second mechanical arm 602 are symmetrically installed at the bottom of the connecting plate 5 .

[0133] When disassembling the mold, start the ball screw 202 to slide the present invention to the front of the mold to be disassembled, adjust the position of the lifting slide 2 by the lifting cylinder 3, start the first cylinder 41 and the second cylinder 42 to drive the connecting plate 5 to move the first robot arm 601 and the second robot arm 602 to the front of the mold to be disassembled; insert the locating pin into the locating pin of the mold to be disassembled, and at the same time control the arm cylinder 63 to rotate the swing arm 64 to extend into the disassembly groove of the disassembly mold 7, and then lift the upper mold plate at the bending center. At this time, the mold can be installed or removed horizontally.

[0134] The present invention can also use one robotic arm alone or two robotic arms at the same time; when it is necessary to pick up and place a shorter mold (a single mold or a single-hole mold), the first robotic arm 61 or the second robotic arm 62 can be used alone; for a wider mold (the mold has at least two pin holes), the first robotic arm 61 or the second robotic arm 62 can be used at the same time, and the mold can be picked up and placed by simultaneous actions.

[0135] like Fig. 22 , which is an example of an embodiment of the present invention in disassembling and assembling a mold:

[0136] In this embodiment, a hook 71 that can be moved horizontally is fixed in the mold 7, and the back side of the hook 73 is fixed in the mold 7 by a screw, and a compression spring 72 is fixed on the screw. When the mold 7 is stored in the clamping tool holder 101, the hydraulic cylinder 104 retracts, and the hook 71 in the mold 7 is pushed out under the action of the compression spring 72, hooking the groove of the clamping tool holder 101, thereby fixing the mold 7. When the mold 7 needs to be taken out, the piston rod of the first cylinder 41 retracts, and the positioning pin 62 pushes the hook 71 into the interior of the mold 7, and the rotating swing arm 64 fixes the mold through the arm cylinder 63, and the lifting cylinder 3 extends, that is, the mold is taken out from the tool magazine, and the piston rod of the first cylinder 41 extends, and the mold is completely moved out. Similarly, the mold can be placed in the designated position of the tool magazine.

[0137] When the mold needs to be disassembled, the present invention drives the ball screw to move the horizontal movable slide to the front of the mold to be disassembled by a motor, starts the lifting cylinder to adjust the height of the lifting slide so that the mechanical arm is aligned with the mold to be disassembled, and then the mold is disassembled and assembled by the cooperation of the horizontal cylinder and the arm cylinder. After disassembly and assembly, the present invention quickly resets, the tool changing speed is fast, time and labor are saved, and the processing efficiency of the equipment is improved.

[0138] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the content of the patent application scope of the present invention should belong to the technical scope of the present invention.

Claims

1. Automatic quick mold changing device for bending center, characterized by: It comprises an upper die clamping device, a bottom plate and an automatic die changing device; the upper die clamping device comprises a clamping tool holder and a clamping assembly arranged on the front end surface of the lower part of the clamping tool holder; the bottom plate is installed on the front end surface of the upper part of the upper die clamping device; the automatic die changing device is slidably connected with the front end surface of the bottom plate; The automatic mold changing device includes a driving base plate, a driving motor, a cylinder, a connecting plate, and a mechanical arm; The driving motor is mounted on the driving base plate; the cylinder is located below the driving motor; a guide rail is provided at the bottom of the driving base plate, and the connecting plate is slidably connected to the guide rail through a slider; the piston rod of the cylinder is connected to the connecting plate to drive it to move on the guide rail; the mechanical arm is provided at the bottom of the connecting plate; The mechanical arm comprises an arm mounting plate, a positioning pin, an arm cylinder and a claw linked to the arm cylinder; The arm mounting plate is fixed to the bottom of the connecting plate; the clamping claw is pivotally connected to one end of the arm mounting plate, and the tail end of the arm cylinder is pivotally connected to the other end of the arm mounting plate; the positioning pin is arranged on one end surface of the arm mounting plate, and is located above the clamping claw; The clamping assembly includes a swing arm support, an upper mold plate and a clamping element; The swing arm supports are fixedly arranged on the front end surface of the clamping tool holder in a group of at least two; the upper mold plate is pivotally connected between the two swing arm supports through a pin shaft; Torsion springs are sleeved on both ends of the pin shaft, one end of the free end of the torsion spring is connected to the swing arm support, and the other end is connected to the upper mold plate; A mounting groove is provided at a position where the front end surface of the clamping tool holder is opposite to the upper mold pressing plate, one end of the clamping element is placed in the mounting groove, and the other end is connected to the upper end of the upper mold pressing plate.

2. The automatic rapid die changing device for a bending center according to claim 1 is characterized in that: A pair of guide rails are arranged on the front end surface of the bottom plate, a gear bar is arranged between the pair of guide rails, and a gear meshing with the gear bar is arranged on the transmission shaft of the driving motor.

3. Automatic quick mold changing device for bending center, characterized by: It comprises an upper die clamping device, a bottom plate and an automatic die changing device; the upper die clamping device comprises a clamping tool holder and a clamping assembly arranged on the front end surface of the lower part of the clamping tool holder; the bottom plate is installed on the front end surface of the upper part of the upper die clamping device; the automatic die changing device is slidably connected with the front end surface of the bottom plate; The automatic mold changing device includes a horizontal moving slide, a lifting slide, a lifting cylinder, a horizontal cylinder, a connecting plate and a mechanical arm; A vertical guide rail is provided on one side of the horizontal moving slide, and the lifting slide is connected to the vertical guide rail through a slider; the lifting cylinder is arranged in the lifting slide, and the piston rod of the lifting cylinder is connected to the top of the horizontal moving slide; The horizontal cylinder is arranged on the lifting slide; a guide rail is arranged at the bottom of the lifting slide, the connecting plate is slidably connected with the guide rail through a slider, and the piston rod of the horizontal cylinder is connected with the connecting plate to drive it to move on the guide rail; the mechanical arm is arranged at the bottom of the connecting plate; The mechanical arm comprises an arm mounting plate, a positioning pin, an arm cylinder and a claw linked to the arm cylinder; The arm mounting plate is fixed to the bottom of the connecting plate; the clamping claw is pivotally connected to one end of the arm mounting plate, and the tail end of the arm cylinder is pivotally connected to the other end of the arm mounting plate; the positioning pin is arranged on one end surface of the arm mounting plate, and is located above the clamping claw; The clamping assembly includes a swing arm support, an upper mold plate and a clamping element; The swing arm supports are fixedly arranged on the front end surface of the clamping tool holder in a group of at least two; the upper mold plate is pivotally connected between the two swing arm supports through a pin shaft; Torsion springs are sleeved on both ends of the pin shaft, one end of the free end of the torsion spring is connected to the swing arm support, and the other end is connected to the upper mold plate; A mounting groove is provided at a position where the front end surface of the clamping tool holder is opposite to the upper mold pressing plate, one end of the clamping element is placed in the mounting groove, and the other end is connected to the upper end of the upper mold pressing plate.

4. The automatic rapid mold changing device for a bending center according to claim 3 is characterized in that: A pair of guide rails are provided on the front end surface of the bottom plate, and a slider slidably connected to the guide rails is provided on the other side surface of the horizontal movable slide; A ball screw is arranged between the guide rails, the horizontal movable slide is connected to the ball screw, and the horizontal movable slide is driven by the ball screw to move back and forth on the guide rails.

5. The automatic rapid die changing device for a bending center according to claim 3 is characterized in that: The automatic mold changing device is provided with a sensor for identifying the specifications and positions of the molds.

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