Automatic punching and chamfering equipment with continuous feeding function

Abstract

The invention discloses automatic punching and chamfering equipment with a continuous feeding function, and relates to the technical field of punching, the automatic punching and chamfering equipment comprises a machine table, stand columns, a top plate, a lifting table, a driving unit and a punching assembly, the stand columns are arranged on the machine table, the top plate is arranged on the stand columns, the lifting table is slidably mounted on the stand columns, and the driving unit is arranged on the lifting table; the stamping assembly comprises a stamping column and a push plate, the driving unit and the stamping column are installed on the lifting table, the push plate is installed on the machine table, an inner connecting rod is connected between the driving unit and the stamping column, an outer connecting rod is arranged between the stamping column and the push plate, and meanwhile, winding coils in the three loading wheels can be controlled to be powered on, so that the stamping assembly can be driven to rotate. The rotation torque of the inertia wheel is increased, the effect of increasing step by step is achieved, the function of reducing the starting load is achieved, the starting current is reduced, equipment is protected against damage caused by instantaneous overload, the torque of the inertia wheel is adjusted and controlled so as to adapt to the hardness of different chamfering materials, and protection on a punch is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of stamping, and specifically to an automatic stamping chamfering device with a continuous feeding function. Background Art

[0002] Metal stamping chamfering is a key process in sheet metal and hardware processing. Traditional automatic stamping equipment generally uses a flywheel and clutch structure to drive the punch. However, this structure has significant defects. Firstly, the starting energy consumption is high. To achieve continuous stamping, the flywheel must have a large moment of inertia to ensure kinetic energy reserve, resulting in a huge inertia that needs to be overcome when the equipment starts. The instantaneous current can reach 3 - 5 times the rated value, causing an impact on the power grid and increasing the energy consumption cost. Secondly, the heat dissipation efficiency is low. During high-speed continuous operation, high temperatures are generated due to the friction between the punch and the workpiece. Existing equipment mostly relies on natural cooling, with a long heat dissipation path and low efficiency. When the punch temperature accumulates to over 400 °C, it is easy to cause material annealing, hardness reduction, and even oxidation of the workpiece surface, forcing the equipment to frequently stop for cooling, affecting production continuity. Although the industry has tried to use variable-frequency motors to reduce the starting load, the core contradiction of the excessive flywheel inertia has not been fundamentally solved. Therefore, there is an urgent need for a stamping chamfering device with low starting current, efficient active heat dissipation, and continuous and stable feeding. Summary of the Invention

[0003] The purpose of the present invention is to provide an automatic stamping chamfering device with a continuous feeding function to solve the problems raised in the prior art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: An automatic stamping chamfering device with a continuous feeding function, including a machine table, columns, a top plate, a lifting table, a driving unit, and a stamping component. The columns are arranged on the machine table, the top plate is arranged on the columns, the lifting table is slidably installed on the columns. The stamping component includes a stamping column and a push plate. The driving unit and the stamping column are installed on the lifting table, the push plate is installed on the machine table, an inner connecting rod is connected between the driving unit and the stamping column, and an outer connecting rod is arranged between the stamping column and the push plate.

[0005] Further, a punching table is arranged on the machine table. The push plate is slidably installed on the punching table. One end of the push plate is provided with a slider, and the push plate is adjustably connected to the slider. The slider is rotatably connected to the stamping column by an outer connecting rod. A feeding frame is arranged on the punching table, and a guiding rod is arranged on the feeding frame. The operator drops the neatly arranged workpieces to be chamfered between the guiding rods. During the up-and-down sliding process of the stamping column, the outer connecting rod is driven to move. The outer connecting rod drives the push plate to slide through the slider. By adjusting the installation position of the push plate on the slider, within the stroke of the slider, the push plate can push the workpieces to be chamfered from below the feeding frame to below the punch.

[0006] Furthermore, a sliding sleeve is provided on the lifting platform, and the stamping column is slidably installed in the sliding sleeve. A punch is integrally provided at the bottom of the stamping column, and an air cavity is opened inside the stamping column. A sealing plug is sealingly and slidingly connected inside the air cavity. One end of the sealing plug is connected to a limiting rod, and a return spring is provided between the sealing plug and the inside of the air cavity. During the operation of the punch, the limiting rod always contacts the workpiece first, and the workpiece is preliminarily fixed by the elastic force of the spring until the punch chamfers the workpiece, the stamping column descends, the push plate moves backward, the stamping column rises, the push plate moves forward, and the next workpiece is pushed under the punch, and the workpiece that has been chamfered is pushed away to realize continuous feeding.

[0007] Furthermore, the limiting rod passes through the stamping column, and the air cavity is connected to the outside through the air inlet. A one-way valve is provided in the air inlet, and several air outlet holes are opened inside the stamping column. Each of the air outlet holes is provided with a pressure relief valve. During the stamping process, as the limiting rod is pressed into the stamping column, the air in the air cavity is compressed and the pressure increases until the pressure exceeds the back pressure value of the pressure relief valve. The pressure relief valve opens, and the compressed air in the air cavity is rapidly ejected through the air outlet. The ejected gas changes from a compressed state to normal pressure and the temperature drops. The cold air is sprayed onto the workpiece to cool it down, reducing the deformation heat during chamfering of the workpiece, thereby preventing the punch from overheating and protecting the punch. As the stamping column rises, the spring pushes the sealing plug to reset the limiting rod, and external air is replenished into the air cavity through the one-way valve.

[0008] Furthermore, a screw is rotatably provided on the top plate, a screw hole is provided in the lifting platform, the screw is threadedly connected to the screw hole, and a handwheel is provided on the top of the screw. The operator drives the screw to rotate by turning the handwheel. When the screw rotates, the lifting platform is driven to slide along the direction of the column through the spiral transmission. The height of the lifting platform is adjusted so that the stroke of the punch meets the requirements of stamping chamfers.

[0009] Furthermore, a crankshaft is rotatably installed on the lifting platform, and an electric control box and a drive box are provided on one side of the lifting platform. One end of the crankshaft is provided in the drive box, the middle part of the crankshaft is rotatably connected to the inner connecting rod, and the other end of the inner connecting rod is connected to the stamping column. An inertia wheel is provided on the side of the crankshaft away from the drive box. The drive box drives the crankshaft to rotate, and the crankshaft drives the stamping column to slide up and down through the inner connecting rod. The crankshaft also drives the inertia wheel to rotate, and the inertia wheel uses rotational inertia to increase the downward stamping force of the stamping column.

[0010] Further, a protective cover is provided on the outer side of the flywheel. The protective cover is connected to the lifting platform through a bracket. Three circles of windings are arranged along the radial direction inside the flywheel. Each circle of windings is composed of several winding coils evenly distributed in a circumferential manner. On one side of the protective cover close to the flywheel, a first loading wheel, a second loading wheel, and a third loading wheel are rotatably arranged. During the startup process of the equipment, all the winding coils are not energized. When the flywheel starts to rotate, the first loading wheel, the second loading wheel, and the third loading wheel are all stationary. The winding coils in the innermost layer of the flywheel and the winding coils in the first loading wheel start to be energized. The magnetic field polarities generated by every two adjacent winding coils are opposite. Through the attraction and transmission between the magnetic forces, the first loading wheel starts to rotate, increasing the rotation torque of the flywheel.

[0011] Further, the first loading wheel is located in the innermost circle, the third loading wheel is located in the outermost circle, and the second loading wheel is located between the first loading wheel and the third loading wheel. Winding coils are also arranged at the positions corresponding to the three layers of windings of the flywheel inside the first loading wheel, the second loading wheel, and the third loading wheel. All the winding coils are connected to the control system through a circuit. The winding coils in the second loading wheel and the third loading wheel are energized in sequence, increasing the rotation torque of the flywheel, achieving the effect of gradually increasing, achieving the function of reducing the starting load, reducing the starting current, protecting the equipment from damage due to instantaneous overload, and at the same time, the torque of the flywheel can be regulated by controlling the energization of the winding coils in the three loading wheels to adapt to the hardness of different chamfering materials and protect the punch.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. The punching column descends, the push plate moves backward, the punching column rises, the push plate moves forward, the push plate pushes the next workpiece under the punch and pushes away the workpiece that has been chamfered, realizing continuous feeding; 2. During the punching process, as the limiting rod is pressed into the punching column, the air in the air chamber is compressed and the pressure rises until the pressure exceeds the back pressure value of the pressure relief valve. The pressure relief valve opens, and the compressed air in the air chamber quickly sprays out through the air outlet hole. The sprayed gas changes from the compressed state to the normal pressure state and the temperature drops. The cold air sprays onto the workpiece for cooling, reducing the deformation heat during workpiece chamfering, thereby preventing the punch from overheating and playing a role in protecting the punch. 3. At the same time, by controlling the energization of the winding coils in the three loading wheels, the rotation torque of the flywheel can be increased, achieving the effect of gradually increasing, achieving the function of reducing the starting load, reducing the starting current, protecting the equipment from damage due to instantaneous overload, regulating the torque of the flywheel to adapt to the hardness of different chamfering materials, and protecting the punch. Description of the Drawings

[0013] Figure 1 Schematic diagram of the overall external structure of the present inventionFigure 1 ; Figure 2 is the schematic diagram of the overall appearance structure of the present invention Figure 2 ; Figure 3 is the schematic diagram of a partial structure of the present invention Figure 1 ; Figure 4 is the schematic diagram of the structure of the crankshaft part of the present invention; Figure 5 is the schematic diagram of a partial structure of the present invention Figure 2 ; Figure 6 is the schematic diagram of the structure of the stamping column part of the present invention Figure 1 ; Figure 7 is the schematic diagram of the structure of the stamping column part of the present invention Figure 2 .

[0014] In the figure: 1, machine platform; 2, column; 3, top plate; 4, handwheel; 5, screw rod; 6, lifting table; 7, electric control box; 8, drive box; 9, crankshaft; 10, sliding sleeve; 11, stamping column; 12, punch head; 13, inner connecting rod; 14, flywheel; 15, protective cover; 16, first loading wheel; 17, second loading wheel; 18, third loading wheel; 19, limiting rod; 20, sealing plug; 21, air inlet hole; 22, air outlet hole; 23, air cavity; 24, winding coil; 25, outer connecting rod; 26, punching table; 27, push plate; 28, feeding frame; 29, guide rod. Specific embodiments

[0015] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0016] Embodiment: As Figures 1 - 7As shown in the figure, the present invention provides a technical solution, an automatic stamping chamfering device with a continuous feeding function, including a machine table 1, a column 2, a top plate 3, a lifting table 6, a driving unit and a stamping component. The column 2 is arranged on the machine table 1, the top plate 3 is arranged on the column 2, the lifting table 6 is slidably installed on the column 2. The stamping component includes a stamping column 11 and a push plate 27. The driving unit and the stamping column 11 are installed on the lifting table 6, the push plate 27 is installed on the machine table 1. An inner connecting rod 13 is connected between the driving unit and the stamping column 11. An outer connecting rod 25 is arranged between the stamping column 11 and the push plate 27. A stamping table 26 is arranged on the machine table 1. The push plate 27 is slidably installed on the stamping table 26. One end of the push plate 27 is provided with a slider. The push plate 27 is adjustably connected to the slider. An outer connecting rod 25 is rotatably connected between the slider and the stamping column 11. A feeding frame 28 is arranged on the stamping table 26. A guide rod 29 is arranged on the feeding frame 28. A screw rod 5 is rotatably arranged on the top plate 3. A screw hole is formed in the lifting table 6. The screw rod 5 is threadedly connected to the screw hole. A hand wheel 4 is arranged at the top of the screw rod 5. The operator drives the screw rod 5 to rotate by rotating the hand wheel 4. When the screw rod 5 rotates, the lifting table 6 is driven to slide along the direction of the column 2 through screw transmission, and the height of the lifting table 6 is adjusted so that the stroke of the punch 12 meets the requirements of stamping chamfering. The operator drops the neatly arranged workpieces to be chamfered between the guide rods 29. During the up and down sliding process of the stamping column 11, the outer connecting rod 25 is driven to move. The outer connecting rod 25 drives the push plate 27 to slide through the slider. By adjusting the installation position of the push plate 27 on the slider, within the stroke of the slider, the push plate 27 can push the workpieces to be chamfered from below the feeding frame 28 to below the punch 12.

[0017] A sliding sleeve 10 is provided on the lifting platform 6, and the stamping column 11 is slidably installed in the sliding sleeve 10. A punch 12 is integrally provided at the bottom of the stamping column 11. An air cavity 23 is provided inside the stamping column 11, and a sealing plug 20 is sealed and slidably connected inside the air cavity 23. One end of the sealing plug 20 is connected to a limiting rod 19, and a return spring (not shown in the figure) is provided between the sealing plug 20 and the inside of the air cavity 23. The limiting rod 19 passes through the stamping column 11, and the air cavity 23 is connected to the outside through the air inlet 21. A one-way valve is provided in the air inlet 21. Several air outlet holes 22 are provided inside the stamping column 11, and a pressure relief valve is provided in each air outlet 22. During the operation of the punch 12, the limiting rod 19 always contacts the workpiece first, and the workpiece is preliminarily fixed by the elastic force of the spring until the punch 12 chamfers the workpiece. , the stamping column 11 drops, the push plate 27 moves backward, the stamping column 11 rises, and the push plate 27 moves forward, pushing the next workpiece to the bottom of the punch 12, and pushing away the workpiece that has been chamfered. During the stamping process, as the limit rod 19 is pressed into the stamping column 11, the air in the air cavity 23 is compressed and the pressure increases until the pressure exceeds the back pressure value of the pressure relief valve. The pressure relief valve opens, and the compressed air in the air cavity 23 is quickly ejected through the air outlet 22. The ejected gas changes from a compressed state to normal pressure and the temperature drops. The cold air is sprayed onto the workpiece to cool it down, reducing the deformation heat when the workpiece is chamfered, thereby preventing the punch 12 from overheating and protecting the punch 12. As the stamping column 11 rises, the spring pushes the sealing plug 20 to reset the limit rod 19, and the external air is replenished into the air cavity 23 through the one-way valve.

[0018] A crankshaft 9 is rotatably mounted on the lifting platform 6. An electric control box 7 and a drive box 8 are provided on one side of the lifting platform 6. One end of the crankshaft 9 is provided in the drive box 8. The middle of the crankshaft 9 is rotatably connected to the inner connecting rod 13. The other end of the inner connecting rod 13 is connected to the stamping column 11. An inertia wheel 14 is provided on the side of the crankshaft 9 away from the drive box 8. A protective cover 15 is provided on the outside of the inertia wheel 14. The protective cover 15 is connected to the lifting platform 6 through a bracket. Three turns of winding are provided inside the inertia wheel 14 in the radial direction. Each turn of winding is circularly wound by several winding coils 24. The protective cover 15 is evenly distributed around the circumference. A first loading wheel 16, a second loading wheel 17 and a third loading wheel 18 are rotatably arranged on one side of the protective cover 15 close to the inertia wheel 14. The first loading wheel 16 is located on the innermost circle, the third loading wheel 18 is located on the outermost circle, and the second loading wheel 17 is located between the first loading wheel 16 and the third loading wheel 18. Winding coils 24 are also provided at positions corresponding to the three-layer windings of the inertia wheel 14 inside the first loading wheel 16, the second loading wheel 17 and the third loading wheel 18. All the winding coils 24 are connected to the control system through circuits.

[0019] The drive box 8 drives the crankshaft 9 to rotate. The crankshaft 9 drives the stamping column 11 to slide up and down through the inner connecting rod 13. The crankshaft 9 also drives the flywheel 14 to rotate. The flywheel 14 utilizes rotational inertia to increase the downward punching force of the stamping column 11. During the startup process of the equipment, all the winding coils 24 are not powered on. When the flywheel 14 starts to rotate, the first loading wheel 16, the second loading wheel 17, and the third loading wheel 18 are all stationary. The winding coils 24 in the innermost layer of the flywheel 14 and the winding coils 24 in the first loading wheel 16 start to be powered on. The magnetic field polarities generated by every two adjacent winding coils 24 are opposite. Through the attraction and transmission between magnetic forces, the first loading wheel 16 starts to rotate, increasing the rotational torque of the flywheel 14. Correspondingly, the winding coils 24 in the second loading wheel 17 and the third loading wheel 18 are powered on in sequence, increasing the rotational torque of the flywheel 14, achieving the effect of gradually increasing, achieving the function of reducing the startup load, reducing the startup current, protecting the equipment from being damaged due to instantaneous overload. At the same time, by controlling the power-on of the winding coils 24 in the three loading wheels, the torque of the flywheel 14 can be regulated to adapt to the hardness of different chamfering materials, realizing the protection of the punch 12.

[0020] The working principle of the present invention: The operator drives the screw rod 5 to rotate by rotating the hand wheel 4. When the screw rod 5 rotates, it drives the lifting table 6 to slide along the direction of the column 2 through screw drive. The lifting table 6 adjusts the height so that the stroke of the punch 12 meets the requirements of punching chamfers. The operator drops the neatly arranged workpieces to be chamfered between the guide rods 29. During the up and down sliding process of the stamping column 11, it drives the outer connecting rod 25 to move. The outer connecting rod 25 drives the push plate 27 to slide through the slider. By adjusting the installation position of the push plate 27 on the slider, within the stroke of the slider, the push plate 27 can push the workpiece to be chamfered from below the feeding frame 28 to below the punch 12.

[0021] During the working process of the punch 12, it is always the limiting rod 19 that first contacts the workpiece, and the workpiece is preliminarily fixed by the elastic force of the spring until the punch 12 chamfers the workpiece. The stamping column 11 descends, the push plate 27 moves backward, the stamping column 11 ascends, the push plate 27 moves forward, pushing the next workpiece to below the punch 12 and pushing away the workpiece that has been chamfered. During the stamping process, as the limiting rod 19 is pressed into the stamping column 11, the air in the air chamber 23 is compressed and the pressure rises until the pressure exceeds the back pressure value of the pressure relief valve, and the pressure relief valve opens. The compressed air in the air chamber 23 quickly sprays out through the air outlet hole 22. The sprayed gas changes from the compressed state to the normal pressure state and the temperature drops. The cold air sprays onto the workpiece for cooling, reducing the deformation heat during workpiece chamfering, thereby preventing the punch 12 from overheating and playing a role in protecting the punch 12. As the stamping column 11 ascends, the spring pushes the sealing plug 20 to reset the limiting rod 19, and the external air is supplemented into the air chamber 23 through the one-way valve.

[0022] The drive box 8 drives the crankshaft 9 to rotate. The crankshaft 9 drives the stamping column 11 to slide up and down through the inner connecting rod 13. At the same time, the crankshaft 9 drives the inertia wheel 14 to rotate. The inertia wheel 14 utilizes rotational inertia to increase the downward punching force of the stamping column 11. During the startup process of the equipment, all the winding coils 24 are not energized. When the inertia wheel 14 starts to rotate, the first loading wheel 16, the second loading wheel 17, and the third loading wheel 18 are all stationary. The winding coils 24 in the innermost layer of the inertia wheel 14 and the winding coils 24 in the first loading wheel 16 start to be energized. The magnetic field polarities generated by every two adjacent winding coils 24 are opposite. Through the attraction and transmission between magnetic forces, the first loading wheel 16 starts to rotate, increasing the rotational torque of the inertia wheel 14. Correspondingly, the winding coils 24 in the second loading wheel 17 and the third loading wheel 18 are energized in sequence, increasing the rotational torque of the inertia wheel 14, achieving the effect of gradually increasing, achieving the function of reducing the startup load, reducing the startup current, protecting the equipment from being damaged due to instantaneous overload. At the same time, by controlling the energization of the winding coils 24 in the three loading wheels, the torque regulation of the inertia wheel 14 can be realized to adapt to the hardness of different chamfering materials, realizing the protection of the punch 12.

[0023] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes that fall within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. An automatic stamping and chamfering device with a continuous feeding function, characterized in that: The invention comprises a machine (1), a column (2), a top plate (3), a lifting platform (6), a driving unit and a stamping assembly, wherein the column (2) is arranged on the machine (1), the top plate (3) is arranged on the column (2), the lifting platform (6) is slidably mounted on the column (2), the stamping assembly comprises a stamping column (11) and a push plate (27), the driving unit and the stamping column (11) are mounted on the lifting platform (6), the push plate (27) is mounted on the machine (1), an inner connecting rod (13) is connected between the driving unit and the stamping column (11), and an outer connecting rod (25) is arranged between the stamping column (11) and the push plate (27).

2. The automatic stamping and chamfering device with a continuous feeding function according to claim 1, characterized in that: The machine (1) is provided with a punching platform (26), the push plate (27) is slidably mounted on the punching platform (26), a slider is provided at one end of the push plate (27), the push plate (27) and the slider are adjustably connected, an external connecting rod (25) is rotatably connected between the slider and the punching column (11), a feed frame (28) is provided on the punching platform (26), and a guide rod (29) is provided on the feed frame (28).

3. An automatic stamping and chamfering device with a continuous feeding function according to claim 1, characterized in that: A sliding sleeve (10) is provided on the lifting platform (6), and the punching column (11) is slidably installed in the sliding sleeve (10). A punch (12) is integrally provided at the bottom of the punching column (11), and an air cavity (23) is provided inside the punching column (11). A sealing plug (20) is sealingly and slidably connected inside the air cavity (23), and one end of the sealing plug (20) is connected to a limiting rod (19), and a return spring is provided between the sealing plug (20) and the inside of the air cavity (23).

4. The automatic stamping and chamfering device with a continuous feeding function according to claim 3, wherein: The limiting rod (19) passes through the punching column (11), the air cavity (23) is connected to the outside through the air inlet (21), a one-way valve is provided in the air inlet (21), and a plurality of air outlet holes (22) are provided inside the punching column (11), and a pressure relief valve is provided in each of the air outlet holes (22).

5. The automatic stamping and chamfering device with a continuous feeding function according to claim 1, wherein: A screw rod (5) is rotatably provided on the top plate (3), a screw hole is provided in the lifting platform (6), the screw rod (5) is threadedly connected to the screw hole, and a hand wheel (4) is provided on the top of the screw rod (5).

6. The automatic stamping and chamfering device with a continuous feeding function according to claim 1, wherein: A crankshaft (9) is rotatably mounted on the lifting platform (6), an electric control box (7) and a drive box (8) are provided on one side of the lifting platform (6), one end of the crankshaft (9) is provided in the drive box (8), a middle portion of the crankshaft (9) is rotatably connected to an inner connecting rod (13), the other end of the inner connecting rod (13) is connected to a stamping column (11), and an inertia wheel (14) is provided on the side of the crankshaft (9) away from the drive box (8).

7. An automatic stamping and chamfering device with a continuous feeding function according to claim 6, characterized in that: A protective cover (15) is provided on the outside of the inertia wheel (14), and the protective cover (15) is connected to the lifting platform (6) through a bracket. Three turns of winding are provided inside the inertia wheel (14) in a radial direction, and each turn of winding consists of a plurality of winding coils (24) uniformly distributed in a circumference. A first loading wheel (16), a second loading wheel (17) and a third loading wheel (18) are rotatably provided on one side of the protective cover (15) close to the inertia wheel (14).

8. An automatic stamping and chamfering device with a continuous feeding function according to claim 7, characterized in that: The first loading wheel (16) is located in the innermost circle, the third loading wheel (18) is located in the outermost circle, and the second loading wheel (17) is located between the first loading wheel (16) and the third loading wheel (18). Winding coils (24) are also provided at positions corresponding to the three-layer windings of the inertial wheel (14) inside the first loading wheel (16), the second loading wheel (17), and the third loading wheel (18). All the winding coils (24) are connected to the control system through a circuit.

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