An automatic punch

Abstract

The utility model discloses an automatic punch press, which comprises a punch press body, a movable plate, a packaging sheet to be punched, a micro-motion mechanism and a punching assembly. The packaging sheet is placed on the upper end of the punch press body and is supported on the movable plate. The micro-motion mechanism is installed on the punch press body and is connected with the movable plate. The micro-motion mechanism is used for displacing the movable plate on the upper end of the punch press body and reciprocating. The punching assembly is installed on the punch press body and is located above the movable plate. The punching assembly has a liftable punching die. The movable plate is driven by the micro-motion mechanism to reciprocate and displace, so that the impact force of the stamping knife is dispersed on different areas of the movable plate. The stress is not concentrated in a single area of the punch press body for a long time, which greatly reduces the wear and tear, such as indentation, of the metal parts of the punch press body and prolongs the service life of the punch press.

Description

Technical Field

[0001] This application relates to the field of press technology, such as punch press, and more specifically to an automatic punch press. Background Technology

[0002] Currently, punch presses used for punching packaging materials such as pearl cotton typically use stainless steel as the main frame material to ensure the overall structural strength, deformation resistance, and service life of the equipment. Meanwhile, the punching components at the top of the press, which directly contact and punch the packaging material, are generally made of high-strength metal materials, considering the significant impact and friction they must withstand during the punching process. These materials possess high hardness and wear resistance, maintaining a good cutting edge shape and ensuring punching accuracy during long-term punching operations. However, in actual packaging material punching operations, the cutting edge of the punching blade in the punching assembly always directly contacts and collides with the same fixed area of ​​the metal table of the punch press body during each punching cycle. Because packaging materials such as pearl cotton are soft, their buffering effect on the punching blade during punching is limited, resulting in significant impact stress generated at the moment of contact between the punching blade and the metal table. This stress is concentrated on the same contact area of ​​the metal table for a long period. As the number of punching operations accumulates, the fixed contact area of ​​the metal table will gradually show wear, dents, scratches, and other damage. On the one hand, this damage directly affects the flatness of the punch press table, easily leading to product quality problems such as punching dimensional deviations and rough edges. On the other hand, when the damage to the metal table reaches a certain level, it causes uneven force on the punching blade during contact, accelerating the wear and deformation of the punching blade's cutting edge and shortening the punching blade replacement cycle. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes an automatic punching machine, the technical solution of which includes: An automatic punch press, comprising: punch press body, A movable plate is placed at the upper end of the punch press body, and the movable plate is used to support the packaging sheet to be punched; A micro-motion mechanism is installed on the punch press body and connected to the movable plate. The micro-motion mechanism is used to move and reciprocate the movable plate at the upper end of the punch press body. A punching assembly is mounted on the punch press body and located above the movable plate, the punching assembly having a liftable punching die.

[0004] The technical solution adopted by one embodiment of this utility model to solve its technical problem is as follows: the micro-motion mechanism includes a drive assembly, an eccentric component, a bearing, and a connecting component. The drive assembly is mounted on the punch press body and its drive shaft is vertically distributed. The eccentric component is vertically fixedly mounted on the drive shaft of the drive assembly. The connecting component is mounted on the movable plate and has a mounting hole. The upper end of the eccentric component extends into the mounting hole. A bearing is provided between the eccentric component and the mounting hole to rotate with both. The eccentric component can rotate relative to the movable plate through the bearing.

[0005] The technical solution adopted by one embodiment of this utility model to solve its technical problem is that the material of the movable plate is plastic.

[0006] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: the punching component is movably and height-adjustable above the movable plate.

[0007] The technical solution adopted by one embodiment of this utility model to solve its technical problem is as follows: the punch press body includes a base, a machine table, a movable seat, multiple columns, and a mechanical transmission mechanism. The machine table is installed on the base and has multiple through holes. A rotatable lead screw nut is installed in each through hole through a bearing. The columns have threaded sections. The multiple columns pass through the multiple through holes and are threadedly connected to the lead screw nut through the threaded sections. A transmission component is installed on each lead screw nut. The mechanical transmission mechanism is connected to the multiple transmission components. The movable seat is fixedly installed on the upper end of the multiple columns, and the punching assembly is installed on the movable seat.

[0008] The technical solution adopted by one embodiment of this utility model to solve its technical problem is as follows: it further includes multiple telescopic rods, which are respectively installed on the base with their telescopic ends facing upwards, and the telescopic ends of the multiple telescopic rods can be extended to abut against the lower end of the column.

[0009] The punching assembly includes an upper die holder, a lead screw lifting device, a toggle mechanism, and a lifting seat. The lifting seat is mounted on the punch press body and located above the movable plate. The upper die holder is disposed between the lifting seat and the movable plate. The punching die is mounted on the upper die holder. The lead screw lifting device is mounted on the lifting seat. Two toggle mechanisms are disposed between the upper die holder and the lifting seat. The two toggle mechanisms are symmetrically distributed on both sides of the slider of the lead screw lifting device and are both connected to the slider. The slider can be raised and lowered to drive the upper die holder and the punching die to rise and fall through the toggle mechanisms.

[0010] The beneficial effects of this utility model are as follows: by driving the movable plate to move back and forth through the micro-motion mechanism, the impact force of the punching knife is dispersed to different areas of the movable plate, avoiding long-term stress concentration in a single area of ​​the punch press body, greatly reducing wear, dents and other damage to the metal parts of the punch press body, and extending the overall service life of the punch press.

[0011] Because damage to the metal parts of the punch press body is reduced, the flatness of the table can be maintained for a long time. At the same time, the micro-movement of the moving plate is stable and controllable, and the positioning accuracy of the packaging sheet is not affected by equipment damage, effectively avoiding problems such as punching size deviation and edge roughness. Meanwhile, because the punching knife is subjected to uniform force and the contact area is dispersed, the wear rate of the cutting edge is slowed down, extending the replacement cycle of the punching knife. Attached Figure Description

[0012] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the automatic punching machine described in this embodiment; Figure 2 This is a schematic diagram of the automatic punching machine structure after the movable seat rises, as described in this embodiment. Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the micro-motion mechanism described in this embodiment; Figure 5 This is a partial structural diagram of the micro-motion mechanism described in this embodiment; Figure 6 This is an exploded view of a partial structure of the micro-motion mechanism described in this embodiment; Detailed Implementation This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0013] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0014] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional 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.

[0015] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0016] Reference Figure 1-6 The content of this application presents an embodiment of the present application. The embodiment described in this application is: 1. An automatic punching press, characterized in that it comprises: Punch press body 10, A movable plate 20 is placed on the upper end of the punch press body 10, and the movable plate 20 is used to support the packaging sheet to be punched. A micro-motion mechanism 30 is installed on the punch press body 10 and connected to the movable plate 20. The micro-motion mechanism 30 is used to move and reciprocate the movable plate 20 at the upper end of the punch press body 10. The punching assembly 40 is mounted on the punch press body 10 and located above the movable plate 20. The punching assembly 40 has a liftable punching die 41.

[0017] The micro-motion mechanism 30 is connected to and fixed on the movable plate 20 on the punch press body 10. Its core function is to drive the movable plate 20 to perform small, periodic reciprocating displacements on the upper end of the punch press body 10, such as horizontal forward and backward and / or left and right micro-movements. After the packaging sheet is positioned, the punching assembly 40 moves down to complete the punching action. At the same time, during each punching cycle interval, the micro-motion mechanism 30 drives the movable plate 20 to move, so that the contact area on the movable plate 20 changes with the displacement, thus preventing the punching knife of the punching assembly 40 from always being aligned with the same position.

[0018] During the initial punching, the movable plate 20 is in its initial position, and the packaging sheet material such as pearl cotton to be punched is placed directly on the movable plate 20 to achieve material bearing and positioning. The punching component 40 descends to punch the material. After punching is completed, the punching component 40 rises to reset, and the micro-motion mechanism 30 immediately drives the movable plate 20 to move slightly, changing the relative position between the movable plate 20 and the punching component 40. The punched sheet is then sent out and fed into the next sheet or the next section of the same roll. Subsequently, the punching component 40 descends again to punch the next sheet or the next section of the same roll, and so on, ensuring that the contact area between the punching knife and the movable plate 20 is different each time punching is performed.

[0019] The micro-motion mechanism 30 drives the movable plate 20 to move back and forth, so that the impact force of the punching knife is distributed to different areas of the movable plate 20, avoiding stress concentration in a single area of ​​the punch body 10 for a long time, greatly reducing wear, dents and other damage to the metal parts of the punch body 10, and extending the overall service life of the punch.

[0020] Because the damage to the metal parts of the punch press body 10 is reduced, the flatness of the table can be maintained for a long time. At the same time, the micro-movement displacement of the movable plate 20 is stable and controllable, and the positioning accuracy of the packaging sheet is not affected by equipment damage, effectively avoiding problems such as punching size deviation and edge roughness. Meanwhile, because the punching knife is subjected to uniform force and the contact area is dispersed, the wear speed of the cutting edge is slowed down, extending the replacement cycle of the punching knife.

[0021] Specifically, the micro-motion mechanism 30 includes a drive assembly 31, an eccentric member 32, a bearing 33, and a connector 34. The drive assembly 31 is mounted on the punch press body 10 and its drive shaft is vertically distributed. The eccentric member 32 is vertically fixed on the drive shaft of the drive assembly 31. The connector 34 is mounted on the movable plate 20 and has a mounting hole 35. The upper end of the eccentric member 32 extends into the mounting hole 35. A bearing 33 is provided between the eccentric member 32 and the mounting hole 35 to rotatably cooperate with both. The eccentric member 32 can rotate relative to the movable plate 20 through the bearing 33.

[0022] When the drive assembly 31 is started, the drive shaft drives the eccentric component 32 to rotate around the vertical axis. Due to the existence of the eccentricity, the eccentric component 32 will generate a periodic horizontal thrust or pull on the connecting component 34 through the bearing 33 during the rotation process, thereby driving the movable plate 20 to move back and forth slightly and stably with the connecting component 34.

[0023] The displacement range is determined by the eccentricity of the eccentric component 32, which can be preset according to the punching requirements.

[0024] The rotational motion of the drive assembly 31 is converted into the linear reciprocating motion of the movable plate 20 by the eccentric structure. The transmission path is simple, the mechanical loss is small, and the displacement amplitude is precisely controlled by the eccentricity, ensuring that the contact areas of each punching are effectively staggered.

[0025] Specifically, the movable plate 20 is made of plastic. Replacing the material of the movable plate 20 with traditional metal, the plastic can be made of materials such as high-strength polyethylene or nylon. When the punching assembly 40 descends, the punching blade first contacts the packaging sheet to complete the punching, and then contacts the plastic movable plate 20.

[0026] The hardness of the plastic material is lower than that of the stainless steel of the punch press body 10 and the metal material of the punching component 40. Even if the punching knife comes into contact with the moving plate 20, it will not cause wear to the cutting edge of the punching knife. On the other hand, the plastic moving plate 20 replaces the metal table as the direct contact part of the punching knife. The entire moving plate 20 can be directly replaced, resulting in low maintenance costs.

[0027] In this embodiment, the punching die 41 is detachably mounted on the punching assembly 40, and the punching assembly 40 is vertically mounted above the movable plate 30.

[0028] The punching assembly 40 can be equipped with punching dies 41 of different heights. The height of the punching assembly 40 can be adjusted by lifting and lowering. On the one hand, the mold closing tonnage can be guaranteed without changing the punching stroke. On the other hand, the distance between the punching die 41 and the movable plate 30 can be adjusted to accommodate punching dies of different heights. On the other hand, as the equipment is used, the movable plate 30 will wear down, causing the gap between the punching die 41 and the movable plate 30 to increase. Under the same punching stroke, this will result in incomplete punching of the product, affecting production. At this time, the height of the punching assembly 40 can be adjusted to ensure that the gap between the punching die 41 and the movable plate 30 is constant, thereby ensuring that the punching die 41 can completely punch the material and thus ensuring production quality.

[0029] Specifically, the punch press body 10 includes a base 11, a machine platform 12, a movable seat 15, multiple columns 14, and a mechanical transmission mechanism 16. The machine platform 12 is mounted on the base 11 and has multiple through holes. Each through hole has a rotatable lead screw nut 17 installed through a bearing. The columns 14 have threaded sections. The multiple columns 14 pass through the multiple through holes and are threadedly connected to the lead screw nut 17 through the threaded sections. Each lead screw nut 17 is equipped with a transmission component 18. The mechanical transmission mechanism 16 is connected to the multiple transmission components 18. The movable seat 15 is fixedly mounted on the upper end of the multiple columns 14, and the punching assembly 40 is mounted on the movable seat 15.

[0030] Referring to the accompanying drawings, the mechanical transmission mechanism 16 includes a motor 161 and a chain 163. A drive sprocket 162 is mounted on the output shaft of the motor. The transmission component 18 is a sprocket, and the chain 163 is wound around the transmission component 18 and the drive sprocket 162.

[0031] When the height of the movable seat 15 needs to be adjusted, the motor 161 of the mechanical transmission mechanism 16 starts and drives multiple transmission components 18 to rotate through the drive sprocket 162 and chain 163. The multiple transmission components 18 drive the corresponding lead screw nut 17 to rotate. The rotation of the lead screw nut 17 causes multiple columns 14 to rise and fall synchronously. Since the movable seat 15 is fixed to the upper end of the column 14, the rise and fall of the column 14 directly drives the movable seat 15 to rise and fall smoothly, thereby realizing the adjustment of the height of the punching assembly 40.

[0032] Preferably, the system also includes a plurality of telescopic rods 13, which are respectively mounted on the base 11 with their telescopic ends facing upwards. The telescopic ends of the plurality of telescopic rods can be extended to abut against the lower end of the column 14.

[0033] When the mechanical transmission mechanism 16 is activated to adjust the height of the movable seat 15, the telescopic end of the telescopic rod 13 (telescopic cylinder) is shortened and moves away from the lower end of the column 14.

[0034] Once the movable seat 15 is positioned at the punching height, the telescopic ends of the multiple telescopic rods 13 extend and abut against the lower end of the column 14, eliminating the tooth surface gap between the threaded section of the column 14 and the lead screw nut 17. This ensures that the lower tooth surface of the threaded section remains engaged with the upper tooth surface of the lead screw nut 17, preventing the column from disengaging from the lead screw nut due to force changes. This also prevents impact wear, reduces equipment vibration and noise, and significantly extends the lifespan of core components such as the chain, lead screw nut, and column. Furthermore, in the gap-free state, the punching force can be directly and efficiently transmitted to the punching assembly, improving punching stability and accuracy.

[0035] In this embodiment, the punching assembly 40 includes an upper die holder 42, a lead screw lifting device 43, a toggle mechanism 44, and a lifting seat 45. The lifting seat 45 is mounted on the punch press body 10 and located above the movable plate 20. The upper die holder 42 is disposed between the lifting seat 45 and the movable plate 20. The punching die 41 is mounted on the upper die holder 42. The lead screw lifting device 43 is mounted on the lifting seat 45. Two toggle mechanisms 44 are disposed between the upper die holder 42 and the lifting seat 45. The two toggle mechanisms 44 are symmetrically distributed on both sides of the slider 431 of the lead screw lifting device 43 and are both connected to the slider 431. The slider 431 can be raised and lowered to drive the upper die holder 42 and the punching die 41 to rise and fall through the toggle mechanism 252.

[0036] Through the coordinated action of the screw lifting device 43 and the toggle mechanism 44, the screw lifting device 43 ensures the accuracy of the mold closing stroke, and the toggle mechanism 44 amplifies the force output by the slider 431 and applies it evenly to the punching material. This not only achieves high-precision control of the mold closing stroke of the upper mold base 42 and the punching die 41, but also ensures that its mold closing tonnage is stable and meets the standard.

[0037] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. An automatic punch press, characterized in that, include: Punch press body (10). A movable plate (20) is placed on the upper end of the punch press body (10), and the movable plate (20) is used to support the packaging sheet to be punched; A micro-motion mechanism (30) is installed on the punch press body (10) and connected to the movable plate (20). The micro-motion mechanism (30) is used to move the movable plate (20) at the upper end of the punch press body (10) and reciprocate. A punching assembly (40) is mounted on the punch press body (10) and located above the movable plate (20), the punching assembly (40) having a liftable punching die (41).

2. The automatic punching machine according to claim 1, characterized in that, The micro-motion mechanism (30) includes a drive assembly (31), an eccentric component (32), a bearing (33), and a connector (34). The drive assembly (31) is mounted on the punch press body (10) and its drive shaft is vertically distributed. The eccentric component (32) is vertically fixed on the drive shaft of the drive assembly (31). The connector (34) is mounted on the movable plate (20) and has a mounting hole (35). The upper end of the eccentric component (32) extends into the mounting hole (35). A bearing (33) is provided between the eccentric component (32) and the mounting hole (35) to rotate with both. The eccentric component (32) can rotate relative to the movable plate (20) through the bearing (33).

3. The automatic punching machine according to claim 1, characterized in that, The movable plate (20) is made of plastic.

4. The automatic punching machine according to claim 1, characterized in that, The punching assembly (40) is vertically and vertically mounted above the movable plate (30).

5. The automatic punching machine according to claim 4, characterized in that, The punch press body (10) includes a base (11), a machine table (12), a movable seat (15), multiple columns (14), and a mechanical transmission mechanism (16). The machine table (12) is mounted on the base (11). The machine table (12) has multiple through holes. Each through hole is fitted with a rotatable lead screw nut (17) via a bearing. The column (14) has a threaded section. Multiple columns (14) pass through multiple through holes and are threadedly connected to the lead screw nut (17) via the threaded section. Each lead screw nut (17) is fitted with a transmission component (18). The mechanical transmission mechanism (16) is connected to the multiple transmission components (18). The movable seat (15) is fixedly mounted on the upper end of the multiple columns (14). The punching assembly (40) is mounted on the movable seat (15).

6. The automatic punching machine according to claim 5, characterized in that, It also includes multiple telescopic rods (13), which are respectively installed on the base (11) with their telescopic ends facing upwards. The telescopic ends of the multiple telescopic rods can be extended to abut against the lower end of the column (14).

7. The automatic punch press according to any one of claims 1-6, characterized in that, The punching assembly (40) includes an upper die holder (42), a lead screw lifting device (43), a toggle mechanism (44), and a lifting seat (45). The lifting seat (45) is mounted on the punch press body (10) and located above the movable plate (20). The upper die holder (42) is disposed between the lifting seat (45) and the movable plate (20). The punching die (41) is mounted on the upper die holder (42). The lead screw lifting device (43) is mounted on the lifting seat (45). Two toggle mechanisms (44) are disposed between the upper die holder (42) and the lifting seat (45). The two toggle mechanisms (44) are symmetrically distributed on both sides of the slider (431) of the lead screw lifting device (43) and are both connected to the slider (431). The slider (431) can be raised and lowered to drive the upper die holder (42) and the punching die (41) to rise and fall through the toggle mechanism (252).

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