Dynamic reverse balance system of high-speed press

Abstract

The invention discloses a dynamic reverse balance system of a high-speed press machine in the field of press machines, which comprises a machine body, a plurality of main connecting rods are hinged on a crankshaft, the main connecting rods are distributed at intervals along the length direction of the crankshaft, a balance block is correspondingly arranged on the machine body above the crankshaft, and a plurality of balance connecting rods are further mounted on the crankshaft. The lower end of each balance connecting rod is hinged to the crankshaft, the upper end of each balance connecting rod is hinged to the balance block, a plurality of air cylinder cavities are formed in the upper portion of the balance block, a liftable piston is arranged in each air cylinder cavity in a matched mode, a piston rod is connected to each piston, and a fixing gland is correspondingly arranged at an opening in the upper portion of each air cylinder cavity. The piston rods extend upwards to penetrate through the corresponding fixing glands, and the extending ends of the piston rods are fixedly connected with the machine body. The stability of the whole press system is better.

Description

Technical Field

[0001] The present invention belongs to the field of presses, and particularly relates to a dynamic reverse balance system for a high-speed press. Background Art

[0002] A high-speed press is a commonly used device for metal forming processing at present. Its working principle is that a motor drives a pulley, the pulley drives a flywheel to rotate at a high speed, and after the flywheel drives a crankshaft to rotate, it drives a slider and an upper die assembly to reciprocate up and down through a crank connecting rod to meet the mold opening and closing states, so as to meet the requirements of metal forming. When the equipment is working, a large amount of kinetic energy will be generated due to the moment of inertia during the process of the crankshaft driving the slider and the upper die assembly to rotate at a high speed. Although most of the energy will be consumed during product forming, due to the different sizes of the processed molds and the different energies required for the designed products, the extra energy will be fed back to the entire motion system, resulting in poor stability and accuracy of the equipment. Over time, it will also cause the equipment to malfunction (for example, since the crankshaft is fixed at both ends and connected to the slider and the upper die assembly in the middle, the release of the moment of inertia during the long-term rotation process will cause deformation at the middle position of the crankshaft, thus affecting the processing accuracy and stability).

[0003] In view of the above existing technical problems, the solution of a common high-speed punching machine is to use a balance weight to ensure a stable dynamic balance relationship between the crankshaft and the machine body during rotation of the crankshaft to ensure the stability of the system. However, the balance weight itself also has its own weight, and the current press cannot eliminate the influence of the weight of the balance weight itself on the machine body. Summary of the Invention

[0004] The purpose of the present invention is to provide a dynamic reverse balance system for a high-speed press, which can apply an upward force to the balance weight through a balance cylinder, so that the self-weight of the balance weight is offset, ensuring a stable dynamic balance relationship between the crankshaft and the machine body during rotation, and better stability of the entire press system.

[0005] The purpose of the present invention is achieved as follows: A dynamic reverse balance system for a high-speed press includes a machine body, a crankshaft rotatably arranged on the machine body, several main connecting rods hinged on the crankshaft, and the main connecting rods are distributed at intervals along the length direction of the crankshaft. A balance weight is correspondingly arranged above the crankshaft on the machine body. Several balance connecting rods are also installed on the crankshaft. The lower ends of the balance connecting rods are all hinged to the crankshaft, and the upper ends of the balance connecting rods are all hinged to the balance weight. Several cylinder cavities are opened in the upper part of the balance weight, and a liftable piston is correspondingly arranged in each cylinder cavity. A piston rod is connected to the piston. A fixed gland is correspondingly arranged at the upper opening of the cylinder cavity, and the piston rod extends upward through the corresponding fixed gland, and the extending end of the piston rod is fixedly connected to the machine body.

[0006] As a dynamic reverse balance system for a high-speed press, the present invention can ensure that the body of the high-speed press maintains high stability when the crankshaft rotates at high speed; the crankshaft is driven to rotate by a rotary drive mechanism, and the rotation of the crankshaft drives the swinging of two main connecting rod bodies I and two main connecting rod bodies II. The two main connecting rod bodies I and the two main connecting rod bodies II drive the main slider to move up and down. At the same time, the balance block is hinged to the crankshaft through two balance connecting rods. Four guide columns surrounding a rectangle are arranged on the press body, and the guide columns guide the up and down movement of the balance block. A plurality of vertical guide rails are arranged on the press body corresponding to the outer periphery of the main slider. When the crankshaft rotates, it also drives the upper balance block to move up and down along the guide columns through each balance connecting rod. The balance block, as a small slider located above the crankshaft, can balance the acting force of the main slider located below the crankshaft on the press body. At the same time, two cylinder cavities on the balance block are connected to the air source. The balance block itself serves as the cylinder block of the cylinder, and the fixed gland seals the cylinder cavity. By supplying air to the cylinder cavity, a force is generated on the piston. Since the piston rod is fixed to the press body, an upward force is generated on the balance block to balance the influence of the self-weight of the balance block; when the air source maintains the pressure in the cylinder cavity, the upward pulling force on the balance block can be maintained. Compared with the prior art, the beneficial effect of the present invention is that it can apply an upward force to the balance block through the balance cylinder, so that the self-weight of the balance block is offset, ensuring a stable dynamic balance relationship between the crankshaft and the body during rotation, and better stability of the entire press system.

[0007] As a further improvement of the present invention, two main connecting rod bodies I symmetrically distributed left and right and two main connecting rod bodies II symmetrically distributed left and right are hinged to the crankshaft. The main connecting rod bodies I and II both extend downward. The lower ends of each main connecting rod body I and main connecting rod body II are hinged to the main slider, and the main slider is movably connected to the body in a liftable manner. The rotation of the crankshaft drives the swinging of the two main connecting rod bodies I and the two main connecting rod bodies II, and the two main connecting rod bodies I and the two main connecting rod bodies II drive the main slider to move up and down, and the upper die assembly on the main slider realizes the lifting movement.

[0008] As a further improvement of the present invention, two balance connecting rods are symmetrically arranged left and right. Two side connecting rod grooves symmetrically distributed left and right are formed on the balance block. The balance connecting rods are located between the corresponding main connecting rod bodies I and II. The two balance connecting rods respectively extend upward into the two side connecting rod grooves. Two symmetrically distributed pins are arranged on the balance block. The upper ends of the two balance connecting rods are respectively hinged to the two pins. The pins are horizontally arranged and parallel to the length direction of the balance block. The balance block is hinged to the crankshaft through two balance connecting rods.

[0009] As a further improvement of the present invention, the pin shaft includes a first shaft body and a second shaft body, the outer diameter of the first shaft body is smaller than that of the second shaft body, cylindrical mounting grooves one and two are respectively formed on the inner and outer sides of each side connecting rod groove on the balance block, the pin shaft is vertically arranged through the corresponding side connecting rod groove, the first shaft body of the pin shaft is fitted and embedded into the mounting groove one, the first shaft body and the second shaft body are respectively arranged to match the inner diameters of the mounting groove one and the mounting groove two, pressing covers for pressing the corresponding pin shafts are arranged on both the left and right sides of the balance block, a circular bearing groove is laterally formed at the upper end of the balance connecting rod, the axial width of the bearing groove is smaller than the width of the balance connecting rod along the axial direction of the pin shaft, a bearing is correspondingly mounted in the bearing groove, and the bearing is sleeved on the outer periphery of the first shaft and abuts against the inner end of the second shaft body facing inwards. The mounting grooves one and two on the balance block position the pin shaft. During installation, first insert the balance connecting rod into the side connecting rod groove, and then install the pin shaft.

[0010] As a further improvement of the present invention, two cylinder cavities are symmetrically arranged on the left and right of the balance block, a main groove is arranged above the two cylinder cavities on the balance block, the height of the upper surface of the fixed pressing cover is lower than that of the upper surface of the balance block, an air inlet is formed on the fixed pressing cover, and the air inlet is communicated with a gas source. A vertical partition plate is arranged between the two cylinder cavities on the balance block. The cylinder cavity includes an upper cavity above the piston and a lower cavity below the piston, the upper cavity and the lower cavity are correspondingly arranged, and both the upper cavity and the lower cavity are circular. Exhaust cavities are respectively formed below each lower cavity on the balance block, the flow area of the exhaust cavity is smaller than that of the lower cavity, the bottom wall height of the exhaust cavity is higher than the bottom height of the balance block, and outwardly inclined discharge channels are respectively formed on the sides of each exhaust cavity on the balance block, and the discharge channels are communicated with the exhaust cavities. The gas source supplies gas to the upper cavity of the cylinder cavity through the air inlet, the gas pushes the piston, and exhausts outward through the lower cavity, the exhaust cavity and the discharge channel. The piston and the piston rod are fixed relative to the press body, thereby generating an upward pulling force on the balance block to balance the self-weight of the balance block.

[0011] As a further improvement of the present invention, a plurality of fixed mounting plates are arranged on the machine body corresponding to each piston rod, and the vertical piston rod is fixedly connected to the corresponding fixed mounting plate. The fixed mounting plates are arranged at the top of the press along the width direction of the balance block.

[0012] As a further improvement of the present invention, four guide columns arranged in a rectangular array are fixedly arranged on the machine body corresponding to the balance block, and four guide holes are vertically formed in the balance block corresponding to the guide columns, and each guide column is respectively arranged to pass through each guide hole in a matching manner. The guide columns guide the lifting of the balance block. Description of the Drawings

[0013] Figure 1 It is a side view of the present invention.

[0014] Figure 2This is the top view of the present invention.

[0015] Figure 3 It is Figure 1 the sectional view taken along the AA direction of

[0016] Figure 4 the enlarged view of the balance weight.

[0017] Figure 5 It is Figure 4 the enlarged view at position D in

[0018] Figure 6 It is Figure 3 the sectional view taken along the BB direction of

[0019] Figure 7 It is Figure 3 the sectional view taken along the CC direction of

[0020] Wherein, 1 is the fuselage, 2 is the crankshaft, 3a is the first main connecting rod body, 3b is the second main connecting rod body, 4 is the balance weight, 5 is the balance connecting rod, 6 is the cylinder cavity, 6a is the upper cavity, 6b is the lower cavity, 7 is the piston, 7a is the piston rod, 8 is the fixed gland, 9 is the main slider, 10 is the side connecting rod groove, 11 is the pin shaft, 11a is the first shaft body, 11b is the second shaft body, 12 is the first installation groove, 13 is the second installation groove, 14 is the gland, 15 is the bearing groove, 16 is the bearing, 17 is the main groove, 18 is the air inlet, 19 is the partition plate, 20 is the exhaust cavity, 21 is the discharge channel, 22 is the fixed mounting plate, 23 is the guide post, 24 is the guide hole. Detailed implementation manners

[0021] As Figures 1-7 shown, it is a dynamic reverse balance system for a high-speed press, including a fuselage 1, on which a crankshaft 2 is rotatably arranged, several main connecting rods are hinged on the crankshaft 2, and the main connecting rods are spaced along the length direction of the crankshaft 2. A balance weight 4 is correspondingly arranged above the crankshaft 2 on the fuselage 1. Several balance connecting rods 5 are also installed on the crankshaft 2. The lower ends of the balance connecting rods 5 are all hinged to the crankshaft 2, and the upper ends of the balance connecting rods 5 are all hinged to the balance weight 4. Several cylinder cavities 6 are opened in the upper part of the balance weight 4. A liftable piston 7 is cooperatively arranged in each cylinder cavity 6. A piston rod 7a is connected to the piston 7. A fixed gland 8 is correspondingly arranged at the upper opening of the cylinder cavity 6. The piston rod 7a extends upward through the corresponding fixed gland 8, and the extending end of the piston rod 7a is fixedly connected to the fuselage 1.

[0022] There are two main connecting rod bodies 3a symmetrically distributed on the left and right hinged to the crankshaft 2, and two main connecting rod bodies 3b symmetrically distributed on the left and right. The main connecting rod bodies 3a and 3b both extend downward. The lower ends of each main connecting rod body 3a and main connecting rod body 3b are hinged to the main slider 9. The main slider 9 is movably connected to the fuselage 1 in a liftable manner. The rotation of the crankshaft 2 drives the two main connecting rod bodies 3a and the two main connecting rod bodies 3b to swing. The two main connecting rod bodies 3a and the two main connecting rod bodies 3b drive the main slider 9 to move up and down, and the upper die assembly on the main slider 9 realizes the lifting motion.

[0023] There are two balance connecting rods 5 symmetrically arranged on the left and right. There are two side connecting rod grooves 10 symmetrically distributed on the left and right on the balance weight 4. The balance connecting rod 5 is located between the corresponding main connecting rod bodies 3a and 3b. The two balance connecting rods 5 respectively extend upward into the two side connecting rod grooves 10. There are two symmetrically distributed pin shafts 11 installed on the balance weight 4. The upper ends of the two balance connecting rods 5 are respectively hinged to the two pin shafts 11. The pin shafts 11 are horizontally arranged and parallel to the length direction of the balance weight 4. The balance weight 4 is hinged to the crankshaft 2 through the two balance connecting rods 5. The pin shaft 11 includes a shaft body one 11a and a shaft body two 11b. The outer diameter of the shaft body one 11a is smaller than the outer diameter of the shaft body two 11b. Cylindrical mounting grooves one 12 and mounting grooves two 13 are respectively opened on the inner and outer sides of each side connecting rod groove 10 on the balance weight 4. The pin shaft 11 is vertically arranged through the corresponding side connecting rod groove 10. The shaft body one 11a of the pin shaft 11 is fitted and embedded into the mounting groove one 12. The shaft body one 11a and the shaft body two 11b are respectively matched with the inner diameters of the mounting groove one 12 and the mounting groove two 13. Pressing covers 14 for pressing the corresponding pin shafts 11 are provided on both the left and right sides of the balance weight 4. A circular bearing groove 15 is laterally opened at the upper end of the balance connecting rod 5. The axial width of the bearing groove 15 is smaller than the width of the balance connecting rod 5 along the axial direction of the pin shaft 11. A bearing 16 is correspondingly installed in the bearing groove 15. The bearing is sleeved on the outer periphery of the shaft one and abuts against the inner end of the shaft body two 11b. The mounting groove one 12 and the mounting groove two 13 on the balance weight 4 position the pin shaft 11. During installation, first insert the balance connecting rod 5 into the side connecting rod groove 10, and then install the pin shaft 11.

[0024] There are two cylinder cavities 6 symmetrically arranged on the left and right of the balance weight 4. Above the two cylinder cavities 6 on the balance weight 4, there is a main groove 17. The height of the upper surface of the fixed gland 8 is lower than the height of the upper surface of the balance weight 4. An air inlet 18 is provided on the fixed gland 8, and the air inlet 18 is connected to the air source. A vertical partition plate 19 is provided between the two cylinder cavities 6 on the balance weight 4. The cylinder cavity 6 includes an upper cavity 6a above the piston and a lower cavity 6b below the piston. The upper cavity 6a and the lower cavity 6b are correspondingly arranged. Both the upper cavity 6a and the lower cavity 6b are circular. An exhaust cavity 20 is provided below each lower cavity 6b on the balance weight 4. The flow area of the exhaust cavity 20 is smaller than the flow area of the lower cavity 6b. The bottom wall height of the exhaust cavity 20 is higher than the bottom height of the balance weight 4. An outwardly inclined discharge channel 21 is provided on the side of each exhaust cavity 20 on the balance weight 4, and the discharge channel 21 is connected to the exhaust cavity 20. The air source supplies air to the upper cavity 6a of the cylinder cavity 6 through the air inlet 18. The gas pushes the piston and discharges outward through the lower cavity 6b, the exhaust cavity 20, and the discharge channel 21. The piston and the piston rod 7a are fixed relative to the press body 1, thereby generating an upward pulling force on the balance weight 4 to balance the self-weight of the balance weight 4. A number of fixed mounting plates 22 are provided on the body 1 corresponding to each piston rod 7a. The vertical piston rod 7a is fixedly connected to the corresponding fixed mounting plate 22. The fixed mounting plates 22 are arranged along the width direction of the balance weight 4 at the top of the press. Four guide columns 23 arranged in a rectangular array are fixedly provided on the body 1 corresponding to the balance weight 4. Four guide holes 24 are vertically provided on the balance weight 4 corresponding to each guide column 23, and each guide column 23 is respectively arranged through each guide hole 24 in a matching manner. The guide columns 23 guide the lifting of the balance weight 4.

[0025] As a dynamic reverse balance system for a high-speed press, the present invention can ensure that the body 1 of the high-speed press maintains high stability when the crankshaft 2 rotates at high speed; the crankshaft 2 is driven to rotate by a rotary drive mechanism, and the rotation of the crankshaft 2 drives the swinging of two main connecting rod bodies 3a and two main connecting rod bodies 3b. The two main connecting rod bodies 3a and the two main connecting rod bodies 3b drive the main slider 9 to move up and down. At the same time, the balance weight 4 is hinged to the crankshaft 2 through two balance connecting rods 5. Four guide columns 23 surrounding a rectangle are arranged on the press body 1, and the guide columns 23 guide the up and down movement of the balance weight 4. A plurality of vertical guide rails are arranged on the press body 1 corresponding to the outer periphery of the main slider 9. When the crankshaft 2 rotates, it also drives the upper balance weight 4 to move up and down along the guide columns 23 through the respective balance connecting rods 5. The balance weight 4, as a small slider located above the crankshaft 2, can balance the acting force of the main slider 9 located below the crankshaft 2 on the press body 1. At the same time, two cylinder cavities 6 on the balance weight 4 are connected to a gas source. The balance weight 4 itself serves as the cylinder block of the cylinder, and the fixed gland 8 seals the cylinder cavity 6. By supplying gas to the cylinder cavity 6, a force is generated on the piston. Since the piston rod 7a is fixed to the press body 1, an upward force is generated on the balance weight 4 to balance the influence of the self-weight of the balance weight 4; when the gas source maintains the pressure in the cylinder cavity 6, an upward pulling force on the balance weight 4 can be maintained. The advantages of the present invention are as follows: An upward force can be applied to the balance weight 4 through the balance cylinder, so that the self-weight of the balance weight 4 is offset, ensuring a stable dynamic balance relationship between the crankshaft 2 and the body 1 during rotation, and better stability of the entire press system.

[0026] The present invention is not limited to the above embodiments. Based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and deformations to some technical features without creative labor according to the disclosed technical content, and these substitutions and deformations are all within the protection scope of the present invention.

Claims

1. A dynamic reverse balancing system for a high-speed press, comprising a machine body, a crankshaft rotatably arranged on the machine body, a plurality of main connecting rods hinged on the crankshaft, each main connecting rod being spaced apart along the length direction of the crankshaft, a balancing block correspondingly arranged on the machine body above the crankshaft, characterized in that: A plurality of balancing connecting rods are also installed on the crankshaft, the lower end of each balancing connecting rod is hinged to the crankshaft, the upper end of each balancing connecting rod is hinged to the balancing block, a plurality of cylinder cavities are opened on the upper part of the balancing block, each of the cylinder cavities is equipped with a liftable piston, a piston rod is connected to the piston, a fixed pressure cover is correspondingly provided at the upper opening of the cylinder cavity, the piston rod extends upward through the corresponding fixed pressure cover, and the protruding end of the piston rod is fixedly connected to the fuselage.

2. A high-speed press dynamic reverse balancing system according to claim 1, characterized in that: The crankshaft is hinged with two main connecting rod bodies 1 and two main connecting rod bodies 2 which are symmetrically distributed on the left and right. The main connecting rod bodies 1 and 2 are both extended downward. The lower ends of the main connecting rod bodies 1 and 2 are hinged with the main sliders, and the main sliders are movably connected to the fuselage in a liftable manner.

3. A high-speed press dynamic reverse balancing system according to claim 2, characterized in that: The two balancing links are symmetrically arranged on the left and right, and two side link grooves symmetrically distributed on the left and right are provided on the balancing block. The balancing link is located between the corresponding main link body one and the main link body two. The two balancing links extend upward into the two side link grooves respectively. The balancing block is provided with two symmetrically distributed pins, and the upper ends of the two balancing links are respectively hinged to the two pins. The pins are horizontally arranged and parallel to the length direction of the balancing block.

4. A high-speed press dynamic reverse balancing system according to claim 3, characterized in that: The pin shaft includes shaft body 1 and shaft body 2, the outer diameter of shaft body 1 is smaller than the outer diameter of shaft body 2, and cylindrical mounting groove 1 and mounting groove 2 are respectively opened on the inner and outer sides of each side connecting rod groove on the balancing block, and the pin shaft vertically passes through the corresponding side connecting rod groove, and the shaft body 1 of the pin shaft is fitted and embedded in the mounting groove 1, and the shaft body 1 and the shaft body 2 are respectively matched with the inner diameters of the mounting groove 1 and the mounting groove 2, and the left and right sides of the balancing block are provided with pressure covers for pressing the corresponding pin shaft, and a circular bearing groove is opened laterally at the upper end of the balancing connecting rod, and the axial width of the bearing groove is smaller than the axial width of the balancing connecting rod along the axial direction of the pin shaft, and a bearing is correspondingly installed in the bearing groove, and the bearing is sleeved on the outer periphery of the shaft 1 and abuts against the inner end of the shaft body 2.

5. A high-speed press dynamic reverse balancing system according to any one of claims 1 to 4, characterized in that: There are two cylinder cavities on the balancing block symmetrically arranged on the left and right, a main groove is arranged on the balancing block above the two cylinder cavities, the height of the upper surface of the fixed pressure cover is lower than the height of the upper surface of the balancing block, an air inlet is opened on the fixed pressure cover, and the air inlet is connected with the air source, a vertical partition plate is arranged between the two cylinder cavities on the balancing block, the cylinder cavity includes an upper cavity located above the piston and a lower cavity located below the piston, the upper cavity and the lower cavity are arranged correspondingly, and the upper cavity and the lower cavity are both circular, an exhaust cavity is opened on the balancing block below each lower cavity, the flow area of ​​the exhaust cavity is smaller than the flow area of ​​the lower cavity, the bottom wall height of the exhaust cavity is higher than the bottom height of the balancing block, and an outwardly inclined exhaust channel is opened on the side of each exhaust cavity on the balancing block, and the exhaust channel is connected with the exhaust cavity.

6. A high-speed press dynamic reverse balancing system according to any one of claims 1 to 4, characterized in that: A plurality of fixed mounting plates are arranged on the fuselage corresponding to each piston rod, and the vertical piston rods are fixedly connected to the corresponding fixed mounting plates.

7. A high-speed press dynamic reverse balancing system according to any one of claims 1 to 4, characterized in that: Four guide columns distributed in a rectangular array are fixedly arranged on the fuselage corresponding to the balance block, and four guide holes are vertically opened on the balance block corresponding to each guide column, and each guide column is respectively arranged to pass through each guide hole.

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