Double-station mobile blanking machine

Abstract

This invention provides a dual-station mobile blanking machine, comprising a worktable, a blanking assembly, and a drive unit. Both ends of the worktable's upper surface are blanking stations. The drive unit's swing seat rotates, driving a swing rod to move along an arc trajectory. Through a double-pivot hinge structure with drive holes at both ends of the swing seat and driven holes of the connecting shaft, the rotational motion is directly converted into horizontal linear displacement of the connecting shaft. This allows the swing rod to push the blanking assembly along a slide rail towards the target blanking station. Furthermore, when the connecting seat rolls downwards along the guide slope of the guide member inside the worktable, the driving punch head descends vertically to complete the blanking action. Subsequently, the elastic element between the moving seat and the connecting seat automatically resets and lifts the punch head. In this structure, the layout of the swing seat and the linked swing rod effectively counteracts the off-center load torque, ensuring smooth movement of the blanking assembly and meeting the industrial requirements for high-speed, precision blanking.

Description

Technical Field

[0001] This utility model relates to the field of shoe upper punching equipment, and in particular to a dual-station mobile punching machine. Background Technology

[0002] To achieve multi-station collaborative operation, current shoe upper die-cutting equipment generally adopts a redundant architecture with a single station and single drive. This means that each die-cutting station is independently equipped with a hydraulic or pneumatic cylinder as a power unit, and a central controller coordinates the sequential actions of the drive units at each die-cutting station. Under this architecture, the worktable needs to integrate a complex network of fluid piping (hydraulic oil pipes or compressed air pipes), pressure valve groups, and position sensors, forming a highly discrete drive system.

[0003] In view of this, those skilled in the art have attempted to develop shoe upper stamping equipment with a single stamping head that moves relative to two stamping stations. However, although current dual-station shoe upper stamping equipment can achieve the movement and switching of a single stamping head between stations, its drive system generally relies on gear rack or lead screw transmission mechanisms. Due to the inherent backlash of gear reversal or the sealing dependence of lead screw transmission, such contact meshing transmissions lead to continuous deterioration of energy efficiency during long-term operation, making it difficult to meet the industrial requirements of high-frequency precision stamping. Utility Model Content

[0004] To address the shortcomings mentioned above in the background technology, this utility model provides a dual-station mobile punching machine.

[0005] The present invention adopts the following technical solution: A dual-station mobile punching machine, characterized in that the punching machine comprises: The workbench has two blanking stations at both ends on its upper surface, and elongated clearance holes are provided on both sides of the two blanking stations on its upper surface. A blanking assembly, comprising a punching head, a movable seat, and a connecting seat arranged sequentially from top to bottom. The movable seat is restricted to move linearly relative to the two blanking stations within the worktable. The punching head is located above the worktable. The two sides of the punching head and the two sides of the connecting seat are connected by guide posts, and the guide posts on both sides of the punching head pass through the two clearance holes respectively. A driving device includes a swing seat, a swing rod, and a connecting shaft. The connecting shaft is restricted to rotating within the connecting seat and has driven holes extending through both sides. The swing seat is restricted to rotating within the worktable and has driving holes extending through both sides. The swing rod passes through the driving holes and the driven holes. When the swing seat rotates, it drives the swing rod to rotate toward one of the blanking stations. The swing rod pushes the blanking assembly to move toward the blanking station through the connecting shaft. When the blanking assembly moves to the blanking station, the punching head descends.

[0006] In one possible implementation, the swing arm is fixed with a limit switch. When the swing seat rotates, it causes the swing arm to rotate relative to one of the blanking stations, and the swing arm pushes the blanking assembly to the blanking station through the connecting shaft, the contact of the limit switch contacts the swing seat.

[0007] In one possible implementation, guide members are fixed at positions corresponding to the two blanking stations on the worktable. Above the guide members is a guide plane, and below the guide members is a guide slope. The guide slope faces downwards from the worktable and tilts outwards from the worktable. The edge at the junction of the guide plane and the guide slope corresponds between the moving seat and the connecting seat. When the blanking assembly moves toward the blanking station, the connecting seat moves downwards along the guide slope, causing the punching head to move downwards at the blanking station, thus forming a blanking action.

[0008] In one possible implementation, the connecting seat is connected to rotatable guide rollers on both sides of the blanking station. When the blanking assembly moves toward the blanking station, the guide rollers move downward along the guide slope, causing the connecting seat to move downward along the guide slope.

[0009] In one possible implementation, an elastic element is connected between the movable seat and the connecting seat, and the elastic force of the elastic element stretching forms a thrust that pushes the connecting seat downward.

[0010] In one possible implementation, the elastic element is a tension spring, and both the movable seat and the connecting seat are provided with connecting rings. The two ends of the tension spring are hooked onto the connecting rings of the movable seat and the connecting seat, respectively. The elastic force of the tension spring pulls the connecting seat upward, causing the stamping head to move upward on the surface of the worktable.

[0011] As can be seen from the above description of the structure of this utility model, compared with the prior art, this utility model has the following advantages: When this utility model is working, when the swing seat rotates, it drives the swing rod to move along an arc trajectory. Through the double-support hinge structure with the driving hole of the swing seat and the driven hole of the connecting shaft passing through its two ends respectively, the rotational motion is directly converted into the horizontal linear displacement of the connecting shaft, so that the swing rod pushes the blanking assembly along the slide rail to the target blanking station through the connecting shaft. This design eliminates intermediate transmission links such as gears and racks, greatly reducing power loss; the double-support layout (i.e., the swing seat and the connecting shaft) effectively counteracts the off-center load torque, ensuring that the blanking assembly moves without jamming, and avoiding the backlash of gear reversal or the sealing dependence problem of screw transmission, thereby meeting the industrial needs of high-cycle precision blanking. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0013] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure along the AA direction.

[0014] Figure 3 for Figure 2 A magnified diagram of point C.

[0015] Figure 4 for Figure 1 A schematic diagram of the cross-sectional structure along the BB direction.

[0016] Figure 5 This is a magnified schematic diagram of point B in the middle.

[0017] Figure 6 for Figure 1 A diagram showing the concealed workbench and the side panels of the base frame.

[0018] Figure 7 A schematic diagram of the slide rail connecting the punching assembly.

[0019] Figure 8 for Figure 7 A magnified diagram at point E in the middle.

[0020] Figure 9 A schematic diagram showing the connection of the swing device to the movable base.

[0021] Figure 10 for Figure 9 A magnified diagram at point F in the middle.

[0022] Figure 11 This is a three-dimensional structural diagram of the punching assembly viewed from below.

[0023] Figure 12 This is a three-dimensional structural diagram of the pressure plate mechanism. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.

[0025] Hereinafter, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0026] Furthermore, in this application, directional terms such as "upper" and "lower" are defined relative to the indicated placement of the components in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the placement of the components in the accompanying drawings.

[0027] This utility model discloses a dual-station mobile punching machine, as shown in the attached figure. Figure 1 and 2 As shown, the punching machine includes a worktable 1, a punching assembly 2, and a drive device 3. The upper surface of the worktable 1 has two punching stations 101 at both ends, and the upper surface of the worktable 1 has elongated clearance holes 102 on both sides of the two punching stations 101.

[0028] As attached Figure 2 and 11 As shown, the blanking assembly 2 includes a punching head 21, a moving seat 22, and a connecting seat 23 arranged sequentially from top to bottom. The moving seat 22 is confined within the worktable 1 and moves linearly relative to the two blanking stations 101. The punching head 21 is located above the worktable 1. The two sides of the punching head 21 and the two sides of the connecting seat 23 are connected by guide posts 24, and the guide posts 24 on both sides of the punching head 21 pass through two clearance holes 102 respectively. The driving device 3 is located in the base frame 11 under the worktable 1, and the driving device 3 is used to drive the blanking assembly 2 to move relative to the two blanking stations 101. Preferably, accordion-style protective covers are fixed to both sides of the guide posts 24 corresponding to the two blanking stations 101, and the ends of the two accordion-style protective covers away from the guide posts 24 are respectively fixed to the side plates of the base frame of the worktable 1, thereby sealing the clearance holes 102.

[0029] As attached Figure 3 , 7 As shown in Figure 8, a slide rail 131 is fixed inside the base frame 11 of the workbench 1 near the two clearance holes 102. The slide rail 131 is arranged parallel to the clearance holes 102. The two slide rails 131 are respectively adapted to connect to the sliders 132. The two sides of the moving seat 22 are fixed to the corresponding sliders 132, thereby restricting the moving seat 22 from sliding relative to the two punching stations 101 in the workbench 1 along the direction of the slide rail 131. (See Appendix 8 for further details.) Figure 6 Preferably, the base frame 11 has a fixed support frame 12 in the middle, and the support frame 12 is located below the punching station 101 to support the two punching stations 101. The two slide rails 131 are fixed to the two sides of the support frame 12 respectively. In this embodiment, the fixing can be formed by inserting bolts.

[0030] As attached Figure 4 and 5 As shown, an elastic element 25 connects the movable seat 22 and the connecting seat 23. The contraction of the elastic element 25 generates an upward pulling force on the connecting seat 23, thereby lifting the stamping head 21 above the worktable 1. Preferably, the elastic element 25 is a tension spring. Both the movable seat 22 and the connecting seat 23 are provided with connecting rings 251. The two ends of the tension spring are hooked onto the connecting rings 251 of the movable seat 22 and the connecting seat 23, respectively. The elastic force pulls the connecting seat 23 upward, causing the stamping head 21 to move upward on the upper surface of the worktable 1.

[0031] Continue to refer to the appendix Figure 4 and 5 Guide members 26 are fixed at the positions corresponding to the two blanking stations within the workbench 1. The upper part of the guide member 26 is a guide plane 261, and the lower part is a guide slope 262. The guide slope 262 slopes downwards and outwards from the workbench 1. The edge at the junction of the guide plane 261 and the guide slope 262 is located between the moving seat 22 and the connecting seat 23. Specifically, the guide member 26 can be formed by bending stainless steel plate. When the blanking assembly 2 moves towards the blanking station 101, the side of the connecting seat 23 abuts against the guide slope 262, causing the connecting seat 23 to move downwards along the guide slope 262 as the moving seat 22 moves, driving the punching head 21 to move downwards on the blanking station 101, forming the blanking action. This mechanical conversion through the guide slope 262 directly transforms the translational motion into a vertical punching action. Compared with the traditional cylinder or oil cylinder driven method, it eliminates the need for independent pneumatic / hydraulic power units (such as air compressors, hydraulic pump stations) and complex piping systems. The workbench 1 only requires a single drive unit 3 to provide horizontal movement power, which significantly reduces energy consumption and equipment complexity, and avoids secondary energy conversion losses in the fluid drive system.

[0032] Furthermore, the connecting seat 23 is connected to rotatable guide rollers 27 on both sides of the blanking station 101. When the blanking assembly 2 moves toward the blanking station 101, the guide rollers 27 abut against the guide slope 262 and move downward, driving the connecting seat 23 to move downward along the guide slope 262, thereby reducing the frictional force between the connecting seat 23 and the guide slope 262.

[0033] Please refer to the appendix. Figure 2 , 4In addition to 12, a pressure plate mechanism is also provided inside the stamping head 21. The pressure plate mechanism includes a base 211, a pressure plate 212, a lead screw 213, a first swing arm 214, and a second swing arm 215. The pressure plate 212 serves as the component in the stamping head 21 that directly applies pressure to the mold to form the shoe upper. The base 211 is fixed relative to the guide post 24, so that the movement of the connecting seat 23 can synchronously drive the base 211 and the entire pressure plate mechanism to translate and rise relative to the worktable 1. The guide post 24 can be fixed relative to the base 211 by the stamping head 21 also including a protective shell 218. The pressure plate mechanism is located inside the protective shell 218, and the upper ends of each guide post 24 are fixed to the corner of the bottom opening of the protective shell 218. The base 211 is fixed to the top inside the protective shell 218, and the guide post 24 is fixed relative to the base 211 through the connection of the protective shell 218.

[0034] Both sides of the bottom of the base 211 are pivotally connected to the first swing arm 214, and both sides of the upper part of the pressure plate 212 are pivotally connected to the second swing arm 215. The first swing arm 214 on both sides of the base 211 and the second swing arm 215 on both sides of the pressure plate 212 are respectively arranged accordingly. The ends of the first swing arm 214 and the ends of the second swing arm 215 on both sides of the pressure plate mechanism are pivotally connected by the first rotating shaft 216 and the second rotating shaft 217 respectively. Their pivot connection structures are the same. Taking the first rotating shaft 216 as an example, the first rotating shaft 216 is embedded in the first swing arm 214, and the end of the second swing arm 215 is sleeved outside the end of the first swing arm 214. After the two ends of the first rotating shaft 216 pass through the first swing arm 214 and the second swing arm 215 in sequence, a retaining spring is installed on the outside of the second swing arm 215 for limiting and fixing, thereby forming a pivot connection structure to ensure that the first swing arm 214 and the second swing arm 215 on both sides of the punch head 21 can pivot about the first rotating shaft 216 and the second rotating shaft 217 respectively.

[0035] A through hole is provided at the axial center of the first rotating shaft 216, and a threaded hole is provided at the axial center of the second rotating shaft 217. A limiting ring 2131 is fixed to one end of the lead screw 213. The lead screw 213 passes through the through hole of the first rotating shaft 216 and is screwed into the threaded hole of the second rotating shaft 217. The limiting ring 2131 abuts against the side surface of the first rotating shaft 216 facing away from the second rotating shaft 217. This allows the lead screw 213 to rotate, causing the second rotating shaft 217 to move towards the first rotating shaft 216 or away from the first rotating shaft 216. When the second rotating shaft 217 moves towards the first rotating shaft 216, it causes the first swing arms 214 and the second swing arms 215 on both sides of the pressure plate mechanism to open synchronously, causing the pressure plate 212 to descend. When the second rotating shaft 217 moves away from the first rotating shaft 216, it causes the first swing arms 214 and the second swing arms 215 on both sides of the pressure plate mechanism to close synchronously, causing the pressure plate 212 to rise. It can be seen that by rotating the lead screw 213, the pressure plate 212 can be raised and lowered in the pressure plate mechanism, thereby adjusting the distance between the pressure plate 212 and the upper surface of the worktable 1, so that the punch head 21 can be lowered to meet the punching requirements of shoe uppers or molds of different thicknesses.

[0036] Preferably, a vertical through slot is provided on one side of the protective shell 218, and one end of the lead screw 213 passes through the through slot to fix the handwheel 219. The lead screw 213 can be rotated by rotating the handwheel 219. This structure helps to improve the convenience of operation.

[0037] As attached Figure 9 and 10 As shown, the driving device 3 includes a swing seat 31, a swing rod 32, and a connecting shaft 33. The connecting shaft 33 also has driven holes extending through both sides, and is restricted to rotate within the connecting seat 23. Specifically, a bearing seat 331 is fixed to the bottom of the connecting seat 23, and the connecting shaft 33 is embedded in and fixed to this bearing seat 331. The swing seat 31 has driving holes extending through both sides, and is restricted to rotate within the worktable 1. Specifically, a drive motor 34 is fixed within the worktable 1. A bushing is provided at the bottom of the swing seat 31, which fits onto the output shaft of the drive motor 34. A bolt is screwed into the output shaft of the drive motor 34 from the outside of the bushing, causing the drive motor 34 to drive the swing seat 31 to rotate within the worktable 1. Preferably, this invention can also be configured with a control system, which can be a PLC controller, for controlling the start and stop of the drive motor 34.

[0038] The swing rod 32 passes through the drive hole and the driven hole, and at the end of the swing rod 32 after exiting the driven hole, a blocking part with an enlarged diameter is provided. The outer diameter of the blocking part is larger than the outer diameter of the driven hole to prevent the swing rod 32 from being pulled out from the connecting shaft 33 toward the swing seat 31. Preferably, linear bearings can be fixed in both the driven hole and the drive hole. The swing rod 32 is adapted to the linear bearings passing through the driven hole and the drive hole to reduce the frictional force of the swing rod 32 relative to the extension and retraction of the driven hole and the drive hole. During operation, when the swing seat 31 rotates and drives the swing rod 32, the swing rod 32 moves in an arc trajectory. Through the double-pivot hinge structure at both ends, which respectively pass through the drive hole of the swing seat 31 and the driven hole of the connecting shaft 33, the rotational motion is directly converted into the horizontal linear displacement of the connecting shaft 33, so that the swing rod 32 pushes the blanking assembly 2 along the slide rail 131 toward the target blanking station 101 via the connecting shaft 33. This design eliminates intermediate transmission links such as gears and racks, significantly reducing power loss. The dual-support layout (i.e., the swing seat and the connecting shaft) effectively counteracts off-center load torque, ensuring smooth movement of the blanking assembly 2 and avoiding the backlash issues of gear reversal or the sealing dependence of lead screw drives, thus meeting the industrial requirements of high-cycle precision blanking. Furthermore, through the rigid swing rod 32 and servo control, the blanking assembly 2 achieves both high speed and precision when switching between the two blanking stations 101. The blanking is triggered instantly upon horizontal positioning via the guide ramp 262, achieving seamless connection between displacement and stamping actions. The overall design achieves energy saving, high precision, and low maintenance through pure mechanical linkage, providing a fundamental support for flexible production.

[0039] Furthermore, a limit switch 35 is fixed to the end of the swing arm 32 away from the connecting shaft 33, and the limit switch 35 establishes a signal connection with the control system. When the swing seat 31 rotates, causing the swing arm 32 to rotate relative to one of the blanking stations 101, and the swing arm 32 pushes the blanking assembly 2 to move to the blanking station 101 via the connecting shaft 33, the contact of the limit switch 35 contacts the contact point on the upper end of the swing seat 31. At this time, the limit switch 35 sends a signal to the control system, and the control system receives the signal and drives the motor 34 to output a pause command, so that the drive device 3 drives the blanking assembly 2 to move to the blanking station 101 and then stops. And when the limit switch 35 contacts the only contact point on the swing seat 31, the control system immediately detects the motor direction mark (Last_Motor_Direction). If the mark is "forward", it is determined that it is located at blanking station B; if the mark is "reverse", it is determined that it is located at blanking station A; thus determining the current blanking station 101 of the blanking assembly 2. Alternatively, light sensors can be installed on the sides of both blanking stations 101 on the workbench 1. When the blanking assembly 2 moves to the blanking station 101 and triggers the light sensor, the control system determines the current blanking station 101 of the blanking assembly 2 based on the signal from the light sensor. In addition, a control key is set on the side of each of the two blanking stations 101 on the workbench 1, corresponding to the two blanking stations 101 respectively. The control system monitors the current position of the blanking component 2. When the operator triggers the control key corresponding to a station, if the blanking component 2 is already in that station, the control system ignores the command and maintains its original position; if the control key corresponding to the other station is triggered, the control system immediately starts the drive motor 34 to rotate in the opposite direction, driving the swing seat 31 to move the blanking component 2 towards the target station, and automatically stops after the limit switch 35 detects the position. This efficiently realizes the precise switching of the blanking component 2 between the two stations, avoids invalid actions, and improves the convenience of operation.

[0040] In summary, this utility model sets blanking stations 101 at both ends of the workbench 1. The blanking assembly 2 is driven to move horizontally by the driving device 3. Specifically, the drive motor 34 of the driving device 3 pushes the swing rod 32 through the swing seat 31, which in turn moves the connecting shaft 33 at the bottom of the blanking assembly 2, thus moving the blanking assembly 2. When the limit switch 35 at the end of the swing rod 32 contacts a single contact point of the swing seat 31, it triggers a positioning signal. The control system determines the current station position based on the motor's most recent rotation direction record. When the operator triggers the target station control key, if it is not the current station, the motor starts and rotates to the target position until the limit switch 35 detects the positioning and automatically stops. If it is the current station, it remains stationary, thereby constructing a precise and energy-saving dual-station collaborative production system. When the guide rollers 27 on both sides of the connecting seat 23 roll downward along the guide slope of the guide member 26 inside the workbench 1, the driving punch head 21 descends vertically to complete the blanking action. Subsequently, the elastic member between the moving seat 22 and the connecting seat 23 automatically resets and lifts the punch head 21. The pressure plate mechanism drives the second rotating shaft 217 to move by rotating the lead screw 213, and the four-bar linkage between the linkage base 211 and the pressure plate 212 opens and closes synchronously, so as to realize the flexible adjustment of the height of the pressure plate 212 to adapt to materials of different thicknesses.

[0041] The above are merely specific embodiments of this utility model, but the design concept of this utility model is not limited thereto. Any non-substantial modifications made to this utility model using this concept shall be considered as an infringement of the protection scope of this utility model.

Claims

1. A dual-station mobile punching machine, characterized in that, The punching machine includes: The workbench has two blanking stations at both ends on its upper surface, and elongated clearance holes are provided on both sides of the two blanking stations on its upper surface. A blanking assembly, comprising a punching head, a movable seat, and a connecting seat arranged sequentially from top to bottom. The movable seat is restricted to move linearly relative to the two blanking stations within the worktable. The punching head is located above the worktable. The two sides of the punching head and the two sides of the connecting seat are connected by guide posts, and the guide posts on both sides of the punching head pass through the two clearance holes respectively. A driving device includes a swing seat, a swing rod, and a connecting shaft. The connecting shaft is restricted to rotating within the connecting seat and has driven holes extending through both sides. The swing seat is restricted to rotating within the worktable and has driving holes extending through both sides. The swing rod passes through the driving holes and the driven holes. When the swing seat rotates, it drives the swing rod to rotate toward one of the blanking stations. The swing rod pushes the blanking assembly to move toward the blanking station through the connecting shaft. When the blanking assembly moves to the blanking station, the punching head descends.

2. The dual-station mobile punching machine as described in claim 1, characterized in that, The swing arm is fixed with a limit switch. When the swing seat rotates, it drives the swing arm to rotate relative to one of the blanking stations, and the swing arm pushes the blanking assembly to move to the blanking station through the connecting shaft, the contact of the limit switch contacts the swing seat.

3. The dual-station mobile punching machine as described in claim 1, characterized in that, Guide members are fixed at positions corresponding to the two blanking stations on the workbench. Above the guide member is a guide plane, and below the guide member is a guide slope. The guide slope faces downwards from the workbench and tilts outwards from the workbench. The edge at the junction of the guide plane and the guide slope corresponds between the moving seat and the connecting seat. When the blanking assembly moves toward the blanking station, the connecting seat moves downwards along the guide slope, causing the punching head to move downwards at the blanking station, thus forming a blanking action.

4. A dual-station mobile punching machine as described in claim 1, characterized in that, The connecting seat is connected to rotatable guide rollers on both sides of the blanking station. When the blanking assembly moves toward the blanking station, the guide rollers move downward along the guide slope, causing the connecting seat to move downward along the guide slope.

5. A dual-station mobile punching machine as described in claim 1, 3, or 4, characterized in that, An elastic element is connected between the movable seat and the connecting seat, and the elastic force of the elastic element when stretched generates a thrust that pushes the connecting seat downward.

6. A dual-station mobile punching machine as described in claim 5, characterized in that, The elastic element is a tension spring. Both the movable seat and the connecting seat are provided with connecting rings. The two ends of the tension spring are hooked onto the connecting rings of the movable seat and the connecting seat, respectively. The elastic force of the tension spring pulls the connecting seat upward, causing the stamping head to move upward on the surface of the worktable.

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