Bending center upper pressing cutter automatic pressing plate mechanism

Abstract

The utility model relates to the technical field of bending equipment, and particularly discloses a bending center upper pressing cutter automatic plate pressing mechanism which comprises a fixed base, a pressing cutter arm set and a driving assembly. The cutter pressing arm set and the driving assembly are both located at the top of the fixed base, the cutter pressing arm set comprises a linkage shaft piece and a swing middle arm, the linkage shaft piece is rotationally arranged at the top of the swing middle arm, swing side arms are arranged on the two sides of the outer portion of the swing middle arm, and the two ends of the linkage shaft piece are connected with the two swing side arms respectively. Upper cutter pressing seats are arranged at the bottoms of the swinging side arms and the swinging middle arm; transmission pull rods are arranged at the bottoms of the swing side arms, the tops of the transmission pull rods are fixedly connected with linkage shaft pieces, connecting sleeve pieces are movably arranged at the bottoms of the transmission pull rods, eccentric shaft pieces are arranged in the connecting sleeve pieces, and one ends of the eccentric shaft pieces are in transmission connection with a driving assembly. And the transmission torque is effectively increased, so that the bending of the plate is kept stable, and the bending quality of the plate is ensured.

Description

Technical Field

[0001] This utility model relates to the field of bending equipment technology, and in particular to an automatic pressure plate mechanism for a bending center pressure knife. Background Technology

[0002] Bending centers are machines primarily used for bending thin metal sheets. They can automatically perform multi-sided bending on thin sheet workpieces, featuring high speed and efficiency. Bending centers can achieve automatic positioning, effectively achieving high precision, saving labor and reducing costs. The main structure of existing bending centers includes a CNC system, a servo forward and backward moving mechanism, a servo upward moving mechanism, a lower die fixing mechanism, and an automatic pressure plate mechanism for the upper pressure knife. During bending, the workpiece is deformed by the upper pressure and the lower pressure plate mechanism, thus completing the bending process. During the operation of the automatic pressure plate mechanism for the upper pressure knife in the bending center, sufficient pressure is required to ensure that the sheet metal does not shift during bending, thereby affecting the bending accuracy.

[0003] Traditional automatic pressure plate mechanisms for upper pressure knives in bending centers use linear guides on both sides and a motor and reducer in the middle to drive the lead screw, which moves the entire upper pressure knife seat up and down in a linear motion. This structure is costly and difficult to debug. When bending thicker plates, it often fails to hold the plate down, resulting in low stability and affecting the bending effect of the plate.

[0004] Referring to patent publication number "CN222288411U", the patent title is "A Flexible Bending Center for Folding Long Plates". This technical solution discloses "a flexible bending center for folding long plates, relating to the field of sheet metal processing equipment technology, including a frame, a pressing frame, a pressing mold, a bending blade holder, an upper bending blade, a lower bending blade, and a drive mechanism. This utility model, by setting up a drive mechanism, drives a first lead screw to rotate by starting a first drive motor, and through the cooperation of a fixed push frame, a third slide, and a third guide rail, the pressing frame presses and fixes the sheet metal. Then, the first drive motor is stopped, and through a second drive assembly and a third drive assembly,..." The bending tool holder drives the upper and lower bending blades to move and rise, which can compress the sheet metal. At this time, the sheet metal is bent and formed under the obstruction of the pressure die. Then, the above operation is reversed to release the fixation of the bent sheet metal. Through the individual control of the first drive motor, the second drive component, and the third drive component, the processing efficiency of the sheet metal can be further improved. Although this technical solution can achieve the effect of automatically pressing down and fixing the sheet metal, it uses a screw drive structure. The screw drive structure is not easy to adjust and cannot ensure smooth pressing when dealing with thicker sheets, which can easily cause the sheet metal to loosen and affect the bending effect.

[0005] Therefore, how to achieve automatic and stable clamping of the sheet metal is the main technical problem that technicians need to solve. Utility Model Content

[0006] The purpose of this invention is to provide an automatic pressure plate mechanism for the bending center pressure knife, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An automatic pressure plate mechanism for a bending center pressure knife includes:

[0009] Fixed base, pressure arm assembly, upper pressure seat and drive assembly;

[0010] The pressure arm assembly and the drive assembly are both located on the top of the fixed base. The pressure arm assembly includes a connecting shaft and a swinging middle arm. The connecting shaft is rotatably mounted on the top of the swinging middle arm, and swinging side arms are provided on both outer sides of the swinging middle arm. The two ends of the connecting shaft are respectively connected to the two swinging side arms. One end of the swinging side arm and the swinging middle arm are both connected to the upper pressure seat. An upper pressure tool is detachably provided directly below the upper pressure seat. The other ends of the swinging middle arm and the swinging side arm are both hinged to the top of the fixed base.

[0011] The bottom of each swing arm is provided with a transmission rod, and the top of the transmission rod is fixedly connected to the linkage shaft. The bottom of the transmission rod is movably provided with a connecting kit, and the interior of the connecting kit is provided with an eccentric shaft. The eccentric cam of the eccentric shaft is fixed in the inner cavity of the connecting kit, and one end of the eccentric shaft is connected to the drive assembly.

[0012] Preferably, the bottom of the transmission rod is threaded with an adjusting nut, and the top of the connecting kit is provided with a fixing stud, the adjusting nut being threadedly connected to the fixing stud.

[0013] Preferably, a fixing nut is provided at the top of the transmission rod, and the top of the transmission rod is fixedly connected to the end of the connecting shaft through the fixing nut.

[0014] Preferably, the drive assembly includes a servo motor and a reducer, the power output end of the servo motor is connected to the power input end of the reducer, and the power output end of the reducer is splined to one end of the eccentric shaft.

[0015] Preferably, both the swing arm and the swing side arm are provided with mounting through holes for the connecting shaft to be installed, and a self-aligning bearing is provided inside the mounting through hole, with the connecting shaft passing through the inner hole of the self-aligning bearing.

[0016] Preferably, bearing supports are fitted on the outer sides of both ends of the eccentric shaft, and a rotating bearing is provided inside the bearing support, with both ends of the eccentric shaft passing through the rotating bearing.

[0017] Preferably, annular pressure plates are provided on both outer sides of the connecting kit, one side of which is in contact with the side of the eccentric wheel of the eccentric shaft, and the annular pressure plates are detachably disposed on the outside of the connecting kit.

[0018] Compared with the prior art, this technical solution provides an automatic pressure plate mechanism for the upper pressure cutter at the bending center: It comprises a fixed base, a pressure arm assembly, a transmission rod, an upper pressure cutter seat, and a drive assembly; the pressure arm assembly and the drive assembly are both located on top of the fixed base. The pressure arm assembly includes a connecting shaft and a swinging middle arm. The connecting shaft is rotatably mounted on top of the swinging middle arm. Swinging side arms are provided on both outer sides of the swinging middle arm, connecting the two ends of the connecting shaft to the two swinging side arms respectively. An upper pressure cutter seat is detachably mounted directly below the upper pressure cutter seat by connecting the bottom of the swinging side arms and the bottom of the swinging middle arm. The upper pressure cutter is detachably mounted directly below the bottom of the swinging side arms. Each component is equipped with a transmission rod, whose top is fixedly connected to a connecting shaft. A connecting kit is movably mounted at the bottom of the transmission rod, and an eccentric shaft is installed inside the connecting kit. The eccentric cam of the eccentric shaft is fixed in the inner cavity of the connecting kit, and one end of the eccentric shaft is connected to the drive assembly. The drive assembly can then drive the eccentric shaft to rotate, which in turn drives the transmission rod to reciprocate. This, in turn, drives the pressure arm assembly to move up and down, achieving automatic and stable pressing of the sheet metal. By effectively increasing the transmission torque, the bending of the sheet metal remains stable, ensuring the quality of the bending process. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the medium-pressure knife arm assembly and transmission tie rod structure of this utility model.

[0022] Figure 3 This is a schematic diagram of the connection structure between the drive assembly and the eccentric shaft in this utility model.

[0023] Figure 4 This is a schematic diagram of the transmission rod and connecting kit in this utility model.

[0024] Figure 5 This is a schematic diagram of the eccentric shaft structure in this utility model.

[0025] Figure 6 This is a schematic diagram of the overall pressing knife in a pressed state in this utility model.

[0026] Figure 7 This is a schematic diagram of the structure of the integral pressing knife in a separated state in this utility model.

[0027] As indicated by the markings in the diagram: 1. Fixed base; 2. Pressure arm assembly; 3. Drive assembly; 4. Transmission rod; 5. Connecting kit; 6. Eccentric shaft; 21. Linkage shaft; 22. Swinging middle arm; 23. Swinging side arm; 24. Upper pressure seat; 25. Upper pressure tool; 26. Mounting through hole; 27. Self-aligning bearing; 31. Servo motor; 32. Reducer; 41. Adjusting nut; 42. Fixing nut; 51. Fixing bolt; 52. Annular pressure plate; 61. Bearing support; 62. Rotary bearing. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. The preferred embodiments of this utility model will now be described in more detail with reference to the accompanying drawings. Although the preferred embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this utility model more thorough and complete, and to fully convey the scope of this utility model to those skilled in the art.

[0029] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0030] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0031] In the description of this utility model, it should be understood that the terms "thickness", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] It should be understood that although the terms "first," "second," "third," etc., may be used to describe various components in this invention, this information should not be limited to these terms. These terms are only used to distinguish components of the same type from each other. For example, without departing from the scope of this invention, a first component may also be referred to as a second component, and similarly, a second component may also be referred to as a first component. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] The following combination Figures 1 to 7 The technical solutions of the embodiments of this utility model are described in detail.

[0035] In Example 1, to achieve automated and smooth pressing of bent sheet metal, existing automatic pressing mechanisms mainly rely on screw drives, which have relatively low transmission torque and cannot guarantee smooth pressing of the sheet metal. In this example: a fixed base 1, a pressing arm assembly 2, an upper pressing seat 24, and a drive assembly 3 are provided. The pressing arm assembly 2 and the drive assembly 3 are both located on top of the fixed base 1. The pressing arm assembly 2 includes a connecting shaft 21 and a swinging middle arm 22. The connecting shaft 21 is rotatably mounted on top of the swinging middle arm 22. Swinging side arms 23 are provided on both sides of the swinging middle arm 22, and the two ends of the connecting shaft 21 are respectively connected to the two swinging side arms 23. The upper pressing seat 24 is connected to the bottom of both the swinging side arms 23 and the swinging middle arm 22. An upper pressing cutter 25 is detachably provided directly below the upper pressing seat 24. The swinging middle arm 22 and the swinging side arms 23 can be connected by a connecting shaft. The arm 23 is connected by a transmission mechanism, and a transmission rod 4 is provided at the bottom of the swing arm 23. The top of the transmission rod 4 is fixedly connected to the connecting shaft 21. A connecting kit 5 is movably provided at the bottom of the transmission rod 4. An eccentric shaft 6 is provided inside the connecting kit 5. The eccentric cam of the eccentric shaft 6 is fixed in the inner cavity of the connecting kit 5, so that one end of the eccentric shaft 6 is connected to the drive assembly 3. Therefore, the drive assembly 3 can drive the eccentric shaft 6 to rotate. During the rotation of the eccentric shaft 6, the eccentric cam drives the transmission rod 4, which in turn drives the connecting shaft 21. This achieves the effect of automatically driving the swing arm 23 and the swing middle arm 22 to perform synchronous up and down reciprocating motion. When the swing middle arm 22 and the swing arm 23 move downward, the upper pressure cutter 25 can be driven to approach the bending plate and press the plate to be bent smoothly.

[0036] It should be noted that the drive assembly 3 includes a servo motor 31 and a reducer 32. The power output end of the servo motor 31 is connected to the power input end of the reducer 32, and the power output end of the reducer 32 is connected to one end of the eccentric shaft 6 via a spline, thereby increasing the transmission torque.

[0037] It should also be noted that by providing mounting through holes 26 for installing the connecting shaft 21 in both the swing arm 22 and the swing side arm 23, and by providing a self-aligning bearing 27 inside the mounting through hole 26, the connecting shaft 21 can be inserted into the inner hole of the self-aligning bearing 27. Thus, when the swing arm 22 and the swing side arm 23 are driven to move up and down synchronously by the connecting shaft 21, it can also be ensured that the positions of the swing arm 22 and the swing side arm 23 are aligned.

[0038] It should be noted that by providing bearing supports 61 on the outside of both ends of the eccentric shaft 6, and by providing rotating bearings 62 inside the bearing supports 61, both ends of the eccentric shaft 6 pass through the rotating bearings 62, so that the eccentric shaft 6 can rotate smoothly when the drive assembly 3 drives the eccentric shaft 6 to rotate.

[0039] In this embodiment, it is necessary to further explain that by providing annular pressure plates 52 on both sides of the outer side of the connecting kit 5, one side of the annular pressure plate 52 is in contact with the side of the eccentric wheel of the eccentric shaft 6, and the annular pressure plate 52 is detachably provided on the outside of the connecting kit 5, thereby facilitating the secure installation of the eccentric shaft 6 inside the connecting kit 5.

[0040] Example 2: This example combines the technical solution of Example 1. To achieve pressing of thicker plates, since the thickness of the plates varies, the automatic pressing mechanism needs to be adjusted during the bending process to accommodate plates of different thicknesses. In this example: an adjusting nut 41 is threaded to the bottom of the transmission rod 4, and a fixing stud is provided at the top of the connecting kit 5. The adjusting nut 41 is threaded to the fixing stud, and the position of the adjusting nut 41 and the fixing bolt 51 can be adjusted to adjust the length of the transmission rod 4, thus enabling pressing of plates of different thicknesses. A locking element can be added at the connection between the transmission rod 4 and the connecting kit 5. After adjusting the length, the connection position of the transmission rod 4 and the connecting kit 5 can be fixed by the locking element.

[0041] It should be noted that by setting a fixing nut 42 on the top of the transmission rod 4, the top of the transmission rod 4 is fixedly connected to the end of the connecting shaft 21 through the fixing nut 42, which effectively facilitates the adjustment of the connection position between the transmission rod 4 and the connecting shaft 21, and facilitates installation and disassembly maintenance.

[0042] The present invention has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have different focuses; for parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also understand that the actions and modules involved in the specification are not necessarily essential to the present invention. Furthermore, it is understood that the steps in the method of the present invention embodiments can be adjusted, combined, and deleted according to actual needs, and the structure in the device of the present invention embodiments can be combined, divided, and deleted according to actual needs.

[0043] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A bending center upper punch automatic clamp mechanism, characterized by, The utility model relates to a fixed base, press knife arm group, upper press knife seat and drive assembly are included: The press knife arm group and the drive assembly are located the top of fixed base, the press knife arm group includes link motion shaft spare and swing middle arm, link motion shaft spare rotation sets in the top of swing middle arm, and the outside both sides of swing middle arm are provided with swing side arm, the both ends of link motion shaft spare are connected two swing side arms respectively, swing side arm and one end of swing middle arm are connected upper press knife seat, the directly below of upper press knife seat is detachably provided with upper press tool, the other end of swing middle arm and swing side arm is hinged in the top of fixed base, The bottom of swing side arm is provided with transmission pull rod, and the top of transmission pull rod is fixedly connected with link motion shaft spare, the bottom of transmission pull rod is movably provided with connecting sleeve spare, the inside of connecting sleeve spare is provided with eccentric shaft spare, the eccentric cam of eccentric shaft spare is fixed in the inner chamber of connecting sleeve spare, and one end of eccentric shaft spare is in transmission connection with drive assembly. The bottom of transmission pull rod is threadedly connected with adjusting nut, and the top of connecting sleeve spare is provided with fixed stud, adjusting nut is in threaded connection with fixed stud.

2. The automatic press plate mechanism of the upper center press knife of the bending machine according to claim 1, characterized in that, The top of transmission pull rod is provided with fixed nut, and the top of transmission pull rod is fixedly connected with the end of link motion shaft spare through fixed nut.

3. The automatic press plate mechanism of the upper center press knife of the bending machine according to claim 1, characterized in that, The drive assembly includes a servo motor and a speed reducer, the power output end of the servo motor is in transmission connection with the power input end of the speed reducer, and the power output end of the speed reducer is in spline coupling with one end of the eccentric shaft.

4. The automatic press plate mechanism of the upper center press knife of the bending machine according to claim 1, characterized in that, The swing middle arm and the swing side arm are provided with mounting through holes for the link motion shaft spare, and the mounting through holes are provided with a plummer block, and the link motion shaft spare is arranged in the inner hole of the plummer block.

5. The automatic press plate mechanism of the upper center press knife of the bending machine according to claim 1, characterized in that, The eccentric shaft spare is further provided with a bearing support on the outside of both ends, and the inside of the bearing support is provided with a rotating bearing, and both ends of the eccentric shaft spare pass through the rotating bearing.

6. The automatic press plate mechanism of the upper center press knife of a bending machine according to claim 1, characterized in that, The outside of both sides of the connecting sleeve spare is provided with an annular pressing disc, one side of the annular pressing disc is in close contact with the eccentric wheel side surface of the eccentric shaft spare, and the annular pressing disc is detachably arranged on the outside of the connecting sleeve spare.

7. The automatic press plate mechanism of the upper center press knife of a bending machine according to claim 1, characterized in that, ​

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