A servo press with a flywheel having a variable moment of inertia

Abstract

The present invention discloses a servo press with a variable moment of inertia flywheel, which relates to the technical field of mechanical transmission press equipment, and includes a fuselage, wherein the fuselage includes an energy storage flywheel mechanism, a main power and crankshaft connecting rod mechanism, a working mechanism, a braking mechanism and a position detection mechanism. The present invention uses the energy storage and release effect of the eccentric variable moment of inertia flywheel. During the operation of the servo press, the eccentric variable moment of inertia flywheel can store energy in the non-working stage. At the critical moment when the crankshaft is about to move to the nominal pressure point, the eccentric variable moment of inertia flywheel uses its stored kinetic energy to automatically decelerate and release the stored energy without the need for additional energy input or consumption, thereby achieving the effect of reducing the installed power of the servo press and improving energy utilization.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical transmission press equipment, in particular to a servo press with a flywheel with variable rotational inertia. Background Art

[0002] Usually, the load of the press is an impact load, that is, in one working cycle, the working load is only borne within the nominal pressure stroke of the slider under the nominal pressure angle. For a general crank press, the stroke that produces the nominal pressure is only 5% to 7% of the slider stroke (the nominal pressure stroke of the split press is 3 to 15 mm, and the closed press is 13 mm). The nominal pressure angle is generally 30° for small presses and 20° for large and medium-sized presses, and the longer the time is idling operation;

[0003] Traditional mechanical presses are mostly presses in which the crankshaft (or eccentric mechanism) drives the slider crank to move up and down. Generally, the maximum nominal tonnage is reached before the slider runs to the bottom dead point. In order to reduce the installed power of the motor, a flywheel is set in the transmission system of the mechanical press to store energy during the idling operation. At the moment of stamping the workpiece, the energy is mainly released by the flywheel. After the workpiece is stamped, the load is reduced, so the motor drives the flywheel to rotate faster, so that it returns to the original angular velocity before stamping the next workpiece. In this way, the energy required for stamping the workpiece is not directly supplied by the motor alone, but by the combination of the flywheel and the motor, so the power of the motor can be greatly reduced.

[0004] The defects of existing servo presses are:

[0005] 1. Patent document US08857326B2 discloses an electric servo press, but the electric servo press in the above document lacks an energy storage device, which will cause a technical problem of low energy utilization when in use;

[0006] 2. Patent document US09126378B2 discloses that a servo press is driven by multiple motors. However, in the above document, when the servo press is started or stopped, it is easy to generate a strong impact current, which will damage the power grid;

[0007] 3. Patent document US08726802B2 discloses a control method and device for an electric servo press, but the above document cannot feed back the excess energy generated or collected to the power grid, which will cause a technical problem of power waste when used;

[0008] 4. Patent document CN109383062B discloses a servo press, but the servo press in the above document has a technical problem of poor precision during use. Summary of the invention

[0009] The object of the present invention is to provide a servo press with a flywheel with variable rotational inertia to solve the technical problems raised in the above background technology.

[0010] To achieve the above-mentioned object, the present invention provides the following technical solutions: A servo press with a variable moment of inertia flywheel, comprising a body, wherein the body comprises an energy storage flywheel mechanism, a main power and crankshaft connecting rod mechanism, a working mechanism, a braking mechanism and a position detection mechanism;

[0011] The energy storage flywheel mechanism comprises an energy storage servo motor, a flat key 1 is installed on the outer wall of the output end of the energy storage servo motor, a V-belt pulley is installed on the outer wall of the flat key 1, a V-belt is installed in the outer edge groove of the V-belt pulley, an eccentric variable moment of inertia flywheel is installed on the other side of the V-belt, a friction clutch is connected to one side of the eccentric variable moment of inertia flywheel by bolts, a flat key 2 is installed on one side of the eccentric variable moment of inertia flywheel, a transmission shaft is installed on the inner wall of the flat key 2, and the friction clutch comprises an engaged state and a disengaged state;

[0012] The outer wall of the transmission shaft is installed with rolling bearing 1 and rolling bearing 2, and the outer wall of rolling bearing 1 is installed on the inner wall of the eccentric variable rotational inertia flywheel, and the outer wall of rolling bearing 2 is installed on the inner wall of the fuselage, one end of the outer wall of the transmission shaft is installed with flat key 3, the outer wall of flat key 3 is installed with gear 1, the outer wall of gear 1 is meshed with gear 2, the inner wall of gear 2 is installed with flat key 4, the inner wall of flat key 4 is installed with a crankshaft, one end of the transmission shaft is installed with a gas and liquid rotary joint, the outer wall of the transmission shaft is opened with a clutch suction power hole, and one end of the clutch suction power hole is connected to the gas and liquid rotary joint, and the other end of the clutch suction power hole is connected to the friction clutch.

[0013] Preferably, the friction clutch includes an engaged state and a disengaged state. When the friction clutch is in the engaged state, the rotational kinetic energy of the eccentric variable moment of inertia flywheel is transmitted to the transmission shaft through flat key 2. When the friction clutch is in the disengaged state, the eccentric variable moment of inertia flywheel will perform idling motion around the transmission shaft under the support of rolling bearing 1.

[0014] Preferably, the main power and crankshaft connecting rod mechanism includes a first bearing, and the outer wall of the first bearing is mounted on the inner wall of the fuselage, and the inner wall of the first bearing is mounted on the outer wall of the crankshaft.

[0015] Preferably, the outer wall of the gear two is meshed with the gear three, the inner wall of the gear three is installed with a flat key five, the inner wall of the flat key five is installed on the output end of the main servo motor, and the bottom of the main servo motor is installed on the fuselage, the main servo motor is electrically connected to the frequency converter, and the frequency converter is electrically connected to the energy storage servo motor, the frequency converter is used to convert the excess energy generated by the energy storage servo motor and the main servo motor into AC power with the same frequency as the power grid through the frequency converter, and input it into the power grid after filtering out the harmonics and noise in the feedback power through a filter.

[0016] Preferably, the working mechanism includes a connecting rod, and one end of the connecting rod is installed on the output end of the crankshaft through a rotating shaft, a ball head connecting rod is installed at the bottom of the connecting rod, one end of the ball head connecting rod is connected to a slider, an upper mold is installed at the bottom of the slider, and the outer wall of the slider is movably connected to the inner wall of the guide rail.

[0017] Preferably, a lower mold is placed directly below the upper mold, and a workbench is installed at the bottom of the lower mold.

[0018] Preferably, the braking mechanism comprises a braking clutch device, and the inner wall of the braking clutch device is mounted on the outer wall of the crankshaft.

[0019] Preferably, the position detection mechanism includes an eccentric position sensor and a crankshaft position sensor. The eccentric position sensor is used to detect the eccentric position of the eccentric block on the eccentric variable moment of inertia flywheel, and the crankshaft position sensor is used to detect the crankshaft position or the slider position.

[0020] Preferably, the working steps of the servo press with variable moment of inertia flywheel are as follows:

[0021] S1. Start the energy storage servo motor to drive the eccentric variable moment of inertia flywheel to rotate. When the eccentric variable moment of inertia flywheel reaches the specified speed;

[0022] S2, start the main servo motor, and drive the crankshaft to rotate through the settings of gear three and gear two, completing the uniform rotation stage of 0°-150°;

[0023] S3. When the crankshaft position sensor detects that the crankshaft rotates close to 150°, the crankshaft position sensor sends information to decelerate the main servo motor to complete the deceleration rotation stage of 150°-161°, and at the same time, the eccentric adjustment mechanism on the eccentric variable moment of inertia flywheel is started to increase the flywheel moment of inertia, thereby reducing the flywheel rotation speed, and at the same time, the friction clutch is brought into the engaged state, and the rotational kinetic energy is transmitted to the friction clutch through the gas and liquid rotary joint and the clutch engagement power hole. Through the engagement state effect of the friction clutch, the energy stored in the eccentric variable moment of inertia flywheel is released and transmitted to the crankshaft through the transmission shaft, gear 1, gear 2 and a plurality of flat keys;

[0024] S4, the rotational kinetic energy released by the eccentric variable inertia flywheel and the rotational kinetic energy of the main servo motor act on the crankshaft together, and finally provide energy for the nominal pressure stroke of the slider at the same time, completing the nominal pressure stroke stage of 161°-180°;

[0025] S5. When the crankshaft position sensor detects that the crankshaft rotates close to 180°, the crankshaft position sensor sends information to cancel the clutch power transmitted to the friction clutch through the gas and liquid rotary joint and the clutch suction power hole, so that the friction clutch disengages the eccentric variable rotational inertia flywheel. The eccentric variable rotational inertia flywheel is driven by the energy storage servo motor to restore the energy storage and idling state. At the same time, the eccentric adjustment mechanism on the eccentric variable rotational inertia flywheel is started to minimize the rotational inertia of the flywheel, and then the main servo motor is used to accelerate the rotation to complete the crankshaft speed increase rotation stage from 180° to 190°.

[0026] S6. When the servo press is in continuous working mode, when the crankshaft position sensor detects that the crankshaft rotates to nearly 190°, the crankshaft position sensor sends information and the main servo motor completes the uniform speed rotation stage from 190° to 360°.

[0027] Preferably, the step S6 further includes the following steps:

[0028] S61. When the servo press is in single working mode, when the crankshaft position sensor detects that the crankshaft has rotated to nearly 360°, the crankshaft position sensor sends information to adjust the main servo motor to slow down and stop rotating, and at the same time start the brake clutch device to ensure that the crankshaft can stably stop at the top dead center position.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The present invention uses the energy storage and release effect of the eccentric variable moment of inertia flywheel. During the operation of the servo press, the eccentric variable moment of inertia flywheel can store energy in the non-working stage. At the critical moment when the crankshaft is about to move to the nominal pressure point, the eccentric variable moment of inertia flywheel uses its stored kinetic energy to automatically decelerate and release the stored energy without the need for additional energy input or consumption, thereby achieving the effect of reducing the installed power of the servo press and improving energy utilization;

[0031] 2. The present invention can realize soft starting and soft braking of the servo press by controlling the engaged state and disengaged state of the friction clutch, thereby effectively reducing the impact current during the start and stop process, thereby achieving the effect of protecting the stability of the power grid;

[0032] 3. The present invention, through the setting of the frequency converter and the filter, can feed back the excess energy stored in the eccentric variable moment of inertia flywheel to the power grid through the energy storage servo motor and the excess energy generated by the main servo motor during the braking or deceleration of the servo press, thereby achieving the effect of reducing energy consumption and improving environmental protection performance;

[0033] 4. The present invention uses an eccentric position sensor and a crankshaft position sensor to obtain the eccentric position of the eccentric block on the eccentric variable moment of inertia flywheel and the precise position of the crankshaft or slider in real time, and performs adjustment and control to achieve the effect of improving processing accuracy and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 The transmission principle diagram of the upper part of the servo press with a variable moment of inertia flywheel of the present invention;

[0035] Figure 2 The transmission principle diagram of the lower half of the servo press with a variable moment of inertia flywheel of the present invention;

[0036] Figure 3 It is a schematic diagram of the crank connecting rod structure of the present invention;

[0037] Figure 4 The graph of the crankshaft rotation angle of the servo press of the present invention with a nominal pressure angle of 19°;

[0038] Figure 5 It is a schematic diagram of the workflow of the present invention.

[0039] In the figure: 1. body; 2. energy storage servo motor; 3. flat key 1; 4. V-belt pulley; 5. V-belt; 6. eccentric variable moment of inertia flywheel; 7. flat key 2; 8. transmission shaft; 9. rolling bearing 1; 10. rolling bearing 2; 11. flat key 3; 12. gear 1; 13. gear 2; 14. gas and liquid rotary joint; 15. clutch suction power hole; 16. first bearing; 17. crankshaft; 18. flat key 4; 19. gear 3; 20. flat key 5; 21. main servo motor; 22. connecting rod; 23. ball head connecting rod; 24. slider; 25. upper die; 26. guide rail; 27. lower die; 28. workbench; 29. ​​brake clutch device; 30. eccentric position sensor; 31. crankshaft position sensor; 32. inverter; 33. filter; 34. friction clutch. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] Example 1: Please refer to Figure 1 , an embodiment provided by the present invention: a servo press with a variable moment of inertia flywheel, comprising a fuselage 1, wherein the fuselage 1 comprises an energy storage flywheel mechanism, a main power and crankshaft connecting rod mechanism, a working mechanism, a braking mechanism and a position detection mechanism;

[0044] The energy storage flywheel mechanism comprises an energy storage servo motor 2, a flat key 1 3 is installed on the outer wall of the output end of the energy storage servo motor 2, a V-belt pulley 4 is installed on the outer wall of the flat key 1 3, a V-belt 5 is installed in the outer edge groove of the V-belt pulley 4, an eccentric variable moment of inertia flywheel 6 is installed on the other side of the V-belt 5, a friction clutch 34 is connected to one side of the eccentric variable moment of inertia flywheel 6 by bolts, a flat key 2 7 is installed on one side of the eccentric variable moment of inertia flywheel 6, a transmission shaft 8 is installed on the inner wall of the flat key 2 7, and the friction clutch 34 includes an engaged state and a disengaged state;

[0045] The outer wall of the transmission shaft 8 is installed with a rolling bearing 1 9 and a rolling bearing 2 10, and the outer wall of the rolling bearing 1 9 is installed on the inner wall of the eccentric variable moment of inertia flywheel 6, and the outer wall of the rolling bearing 2 10 is installed on the inner wall of the fuselage 1, a flat key 3 11 is installed at one end of the outer wall of the transmission shaft 8, a gear 12 is installed on the outer wall of the flat key 3 11, a gear 2 13 is meshed with the outer wall of the gear 12, a flat key 4 18 is installed on the inner wall of the gear 2 13, a crankshaft 17 is installed on the inner wall of the flat key 4 18, an air and liquid rotary joint 14 is installed at one end of the transmission shaft 8, a clutch suction power hole 15 is opened on the outer wall of the transmission shaft 8, and one end of the clutch suction power hole 15 is connected to the air and liquid rotary joint 14, and the other end of the clutch suction power hole 15 is connected to the friction clutch 34;

[0046] The main power and crankshaft connecting rod mechanism includes a first bearing 16, and the outer wall of the first bearing 16 is mounted on the inner wall of the fuselage 1, and the inner wall of the first bearing 16 is mounted on the outer wall of the crankshaft 17;

[0047] Furthermore, through the energy storage and release effect of the eccentric variable moment flywheel 6, during the operation of the servo press, the eccentric variable moment flywheel 6 can store energy in the non-working stage. At the critical moment when the crankshaft 17 is about to move to the nominal pressure point, the eccentric variable moment flywheel 6 uses its stored kinetic energy to automatically slow down and release the stored energy without the need for additional energy input or consumption, thereby achieving the effect of reducing the installed power of the servo press and improving energy utilization.

[0048] Example 2: Please refer to Figure 1 , an embodiment provided by the present invention: the friction clutch 34 includes an engaged state and a disengaged state. When the friction clutch 34 is in the engaged state, the rotational kinetic energy of the eccentric variable moment of inertia flywheel 6 is transmitted to the transmission shaft 8 through the flat key 2 7. When the friction clutch 34 is in the disengaged state, the eccentric variable moment of inertia flywheel 6 will perform idling motion around the transmission shaft 8 under the support of the rolling bearing 1 9;

[0049] Furthermore, by controlling the engaged state and disengaged state of the friction clutch 34, soft starting and soft braking of the servo press can be achieved, thereby effectively reducing the impact current during the start and stop process, thereby achieving the effect of protecting the stability of the power grid.

[0050] Example 3: Please refer to Figure 1 and Figure 2, an embodiment provided by the present invention: the outer wall of the gear 2 13 is meshed with the gear 3 19, the inner wall of the gear 3 19 is installed with the flat key 5 20, the inner wall of the flat key 5 20 is installed at the output end of the main servo motor 21, and the bottom of the main servo motor 21 is installed on the fuselage 1, the main servo motor 21 is electrically connected to the inverter 32, and the inverter 32 is electrically connected to the energy storage servo motor 2, the inverter 32 is used to convert the excess energy generated by the energy storage servo motor 2 and the main servo motor 21 into AC power with the same frequency as the power grid through the inverter 32, and filter the harmonics and noise in the feedback power through the filter 33 before inputting it into the power grid;

[0051] Furthermore, through the setting of the frequency converter 32 and the filter 33, during the braking or deceleration of the servo press, the excess energy stored in the eccentric variable rotational inertia flywheel 6 can be fed back to the power grid together with the excess energy generated by the energy storage servo motor 2 and the main servo motor 21, thereby achieving the effect of reducing energy consumption and improving environmental protection performance.

[0052] Example 4: Please refer to Figure 2 and Figure 3 The present invention provides an embodiment: the working mechanism includes a connecting rod 22, and one end of the connecting rod 22 is installed on the output end of the crankshaft 17 through a rotating shaft, a ball head connecting rod 23 is installed at the bottom of the connecting rod 22, one end of the ball head connecting rod 23 is connected to a slider 24, an upper mold 25 is installed at the bottom of the slider 24, and the outer wall of the slider 24 is movably connected to the inner wall of the guide rail 26;

[0053] A lower mold 27 is placed directly below the upper mold 25, and a workbench 28 is installed at the bottom of the lower mold 27;

[0054] The brake mechanism includes a brake clutch device 29, and the inner wall of the brake clutch device 29 is mounted on the outer wall of the crankshaft 17;

[0055] The position detection mechanism includes an eccentric position sensor 30 and a crankshaft position sensor 31. The eccentric position sensor 30 is used to detect the eccentric position of the eccentric block on the eccentric variable moment of inertia flywheel 6, and the crankshaft position sensor 31 is used to detect the position of the crankshaft 17 or the position of the slider 24.

[0056] Furthermore, the eccentric position sensor 30 and the crankshaft position sensor 31 are used to obtain the eccentric position of the eccentric block on the eccentric variable moment of inertia flywheel 6 and the precise position of the crankshaft 17 or the slider 24 in real time, and to perform adjustment and control, so as to achieve the effect of improving processing accuracy and stability.

[0057] Example 5: Please refer to Figure 4, an embodiment provided by the present invention: a servo press with a variable moment of inertia flywheel, comprising a fuselage 1, wherein the fuselage 1 comprises an energy storage flywheel mechanism, a main power and crankshaft connecting rod mechanism, a working mechanism, a braking mechanism and a position detection mechanism;

[0058] The energy storage flywheel mechanism comprises an energy storage servo motor 2, a flat key 1 3 is installed on the outer wall of the output end of the energy storage servo motor 2, a V-belt pulley 4 is installed on the outer wall of the flat key 1 3, a V-belt 5 is installed in the outer edge groove of the V-belt pulley 4, an eccentric variable moment of inertia flywheel 6 is installed on the other side of the V-belt 5, a friction clutch 34 is connected to one side of the eccentric variable moment of inertia flywheel 6 by bolts, a flat key 2 7 is installed on one side of the eccentric variable moment of inertia flywheel 6, a transmission shaft 8 is installed on the inner wall of the flat key 2 7, and the friction clutch 34 includes an engaged state and a disengaged state;

[0059] The outer wall of the transmission shaft 8 is installed with a rolling bearing 1 9 and a rolling bearing 2 10, and the outer wall of the rolling bearing 1 9 is installed on the inner wall of the eccentric variable moment of inertia flywheel 6, and the outer wall of the rolling bearing 2 10 is installed on the inner wall of the fuselage 1, a flat key 3 11 is installed at one end of the outer wall of the transmission shaft 8, a gear 12 is installed on the outer wall of the flat key 3 11, a gear 2 13 is meshed with the outer wall of the gear 12, a flat key 4 18 is installed on the inner wall of the gear 2 13, a crankshaft 17 is installed on the inner wall of the flat key 4 18, an air and liquid rotary joint 14 is installed at one end of the transmission shaft 8, a clutch suction power hole 15 is opened on the outer wall of the transmission shaft 8, and one end of the clutch suction power hole 15 is connected to the air and liquid rotary joint 14, and the other end of the clutch suction power hole 15 is connected to the friction clutch 34;

[0060] The outer wall of the gear 2 13 is meshed with a gear 3 19, and the inner wall of the gear 3 19 is installed with a flat key 5 20, and the inner wall of the flat key 5 20 is installed at the output end of the main servo motor 21, and the bottom of the main servo motor 21 is installed on the fuselage 1, the main servo motor 21 is electrically connected to the frequency converter 32, and the frequency converter 32 is electrically connected to the energy storage servo motor 2, and the frequency converter 32 is used to convert the excess energy generated by the energy storage servo motor 2 and the main servo motor 21 into AC power with the same frequency as the power grid through the frequency converter 32, and filter the harmonics and noise in the feedback power through the filter 33 before inputting it into the power grid;

[0061] The working mechanism includes a connecting rod 22, and one end of the connecting rod 22 is installed on the output end of the crankshaft 17 through a rotating shaft, a ball head connecting rod 23 is installed at the bottom of the connecting rod 22, one end of the ball head connecting rod 23 is connected to a slider 24, an upper mold 25 is installed at the bottom of the slider 24, and the outer wall of the slider 24 is movably connected to the inner wall of the guide rail 26;

[0062] Furthermore, the energy storage servo motor 2 and the main servo motor 21, two kinds of power can act together on the crankshaft 17, and finally provide the required energy for the stroke of the slider 24. The energy storage servo motor 2 is mainly used to provide the required energy for the energy storage flywheel mechanism, and then release the stored energy when the center line of the crankshaft 17 rotates to the nominal pressure angle. The main servo motor 21 provides the required energy for the up and down reciprocating motion of the slider 24 and the movement of the slider 24.

[0063] At the moment before the slider 24 of the energy storage flywheel mechanism enters the nominal pressure stroke, the rotational inertia of the eccentric variable rotational inertia flywheel 6 can be adjusted from the minimum value to the maximum value when the control instruction is obtained;

[0064] The kinetic energy calculation formula of the eccentric variable moment of inertia flywheel 6 is: , E is the kinetic energy of the eccentric variable moment of inertia flywheel 6 , J is the moment of inertia of the eccentric variable moment of inertia flywheel 6 , and W is the angular velocity of the eccentric variable moment of inertia flywheel 6 .

[0065] According to the principle of conservation of energy, the rotating eccentric variable moment of inertia flywheel 6 is utilized to increase the moment of inertia and reduce the angular velocity of the eccentric variable moment of inertia flywheel 6. When the crankshaft 17 enters the nominal pressure point, the eccentric variable moment of inertia flywheel 6 is decelerated without energy loss, and energy is released, thereby reducing the installed power of the servo press and improving the energy utilization rate.

[0066] Example 6: Please refer to Figure 5 The present invention provides an embodiment: the working steps of the servo press with a variable moment of inertia flywheel are as follows:

[0067] S1, start the energy storage servo motor 2 to drive the eccentric variable moment of inertia flywheel 6 to rotate, when the eccentric variable moment of inertia flywheel 6 reaches a specified speed;

[0068] S2, start the main servo motor 21, and drive the crankshaft 17 to rotate through the setting of gear three 19 and gear two 13, completing the uniform rotation stage of 0°-150°;

[0069] S3, when the crankshaft position sensor 31 detects that the crankshaft 17 rotates close to 150°, the crankshaft position sensor 31 sends information to decelerate the main servo motor 21 to complete the deceleration rotation stage of 150°-161°, and at the same time start the eccentric adjustment mechanism on the eccentric variable moment of inertia flywheel 6 to increase the flywheel moment of inertia, thereby reducing the flywheel rotation speed, and at the same time make the friction clutch 34 reach the engaged state, and transmit the rotational kinetic energy to the friction clutch 34 through the gas and liquid rotary joint 14 and the clutch engagement power hole 15. Through the engaged state effect of the friction clutch 34, the energy stored in the eccentric variable moment of inertia flywheel 6 is released and transmitted to the crankshaft 17 through the transmission shaft 8, gear 1 12, gear 2 13 and a plurality of flat keys;

[0070] S4, the rotational kinetic energy released by the eccentric variable inertia flywheel 6 and the rotational kinetic energy of the main servo motor 21 act together on the crankshaft 17, and finally provide energy for the nominal pressure stroke of the slider 24 at the same time, completing the nominal pressure stroke stage of 161°-180°;

[0071] S5. When the crankshaft position sensor 31 detects that the crankshaft 17 rotates nearly 180°, the crankshaft position sensor 31 sends information to cancel the clutch power transmitted to the friction clutch 34 through the gas-liquid rotary joint 14 and the clutch suction power hole 15, so that the friction clutch 34 is disengaged from the eccentric variable rotational inertia flywheel 6. The eccentric variable rotational inertia flywheel 6 is driven by the energy storage servo motor 2 to restore the energy storage and idling state. At the same time, the eccentric adjustment mechanism on the eccentric variable rotational inertia flywheel 6 is started to minimize the flywheel's rotational inertia, and then the main servo motor 21 is used to accelerate the rotation to complete the 180° to 190° crankshaft 17 speed increase stage;

[0072] S6, when the servo press is in continuous working mode, when the crankshaft position sensor 31 detects that the crankshaft 17 rotates to nearly 190°, the crankshaft position sensor 31 sends information, and the main servo motor 21 completes the uniform rotation stage from 190° to 360°;

[0073] The step S6 also includes the following steps:

[0074] S61, when the servo press is in single working mode, when the crankshaft position sensor 31 detects that the crankshaft 17 rotates to nearly 360°, the crankshaft position sensor 31 sends information to adjust the main servo motor 21 to slow down and stop rotating, and at the same time start the brake clutch device 29 to ensure that the crankshaft 17 can stably stop at the top dead center position.

[0075] Working principle: through the energy storage and release effect of the eccentric variable rotation inertia flywheel 6, during the operation of the servo press, the eccentric variable rotation inertia flywheel 6 can store energy in the non-working stage. At the critical moment when the crankshaft 17 is about to move to the nominal pressure point, the eccentric variable rotation inertia flywheel 6 uses its stored kinetic energy to automatically slow down and release the stored energy without the need for additional energy input or consumption, thereby achieving the effect of reducing the installed power of the servo press and improving the energy utilization rate. By controlling the engaged state and disengaged state of the friction clutch 34, the soft start and soft braking of the servo press can be achieved, thereby effectively reducing The impact current during the start and stop process is reduced to achieve the effect of protecting the stability of the power grid. Through the settings of the frequency converter 32 and the filter 33, during the braking or deceleration of the servo press, the excess energy stored in the eccentric variable moment of inertia flywheel 6 can be fed back to the power grid together with the excess energy generated by the energy storage servo motor 2 and the main servo motor 21, thereby achieving the effect of reducing energy consumption and improving environmental protection performance. The eccentric position sensor 30 and the crankshaft position sensor 31 are used to obtain the eccentric position of the eccentric block on the eccentric variable moment of inertia flywheel 6 and the precise position of the crankshaft 17 or the slider 24 in real time, and adjust and control them to achieve the effect of improving processing accuracy and stability.

[0076] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A method for using a servo press with a variable moment of inertia flywheel, the method for using the servo press with a variable moment of inertia flywheel being characterized in that: The servo press comprises a body (1), wherein the body (1) comprises an energy storage flywheel mechanism, a main power and crankshaft connecting rod mechanism, a working mechanism, a braking mechanism and a position detection mechanism; The energy storage flywheel mechanism comprises an energy storage servo motor (2); a flat key 1 (3) is mounted on the outer wall of the output end of the energy storage servo motor (2); a V-belt pulley (4) is mounted on the outer wall of the flat key 1 (3); a V-belt (5) is mounted in the outer edge groove of the V-belt pulley (4); an eccentric variable moment of inertia flywheel (6) is mounted on the other side of the V-belt (5); a friction clutch (34) is bolted to one side of the eccentric variable moment of inertia flywheel (6); a flat key 2 (7) is mounted on one side of the eccentric variable moment of inertia flywheel (6); a transmission shaft (8) is mounted on the inner wall of the flat key 2 (7); and the friction clutch (34) comprises an engaged state and a disengaged state; The outer wall of the transmission shaft (8) is mounted with a rolling bearing 1 (9) and a rolling bearing 2 (10), and the outer wall of the rolling bearing 1 (9) is mounted on the inner wall of the eccentric variable moment of inertia flywheel (6), and the outer wall of the rolling bearing 2 (10) is mounted on the inner wall of the fuselage (1). A flat key 3 (11) is mounted on one end of the outer wall of the transmission shaft (8), and a gear 1 (12) is mounted on the outer wall of the flat key 3 (11), and a gear 2 (13) is meshed with the outer wall of the gear 1 (12). A flat key 4 (18) is installed on the inner wall of the gear 2 (13), a crankshaft (17) is installed on the inner wall of the flat key 4 (18), a gas / liquid rotary joint (14) is installed on one end of the transmission shaft (8), a clutch suction power hole (15) is opened on the outer wall of the transmission shaft (8), one end of the clutch suction power hole (15) is connected to the gas / liquid rotary joint (14), and the other end of the clutch suction power hole (15) is connected to the friction clutch (34); The outer wall of the gear 2 (13) is meshed with the gear 3 (19), the inner wall of the gear 3 (19) is installed with a flat key 5 (20), the inner wall of the flat key 5 (20) is installed at the output end of the main servo motor (21), and the bottom of the main servo motor (21) is installed on the fuselage (1), the main servo motor (21) is electrically connected to the frequency converter (32), and the frequency converter (32) is electrically connected to the energy storage servo motor (2), the frequency converter (32) is used to convert the excess energy generated by the energy storage servo motor (2) and the main servo motor (21) into AC power with the same frequency as the power grid through the frequency converter (32), and filter out the harmonics and noise in the feedback power through the filter (33) before inputting it into the power grid; The working steps of the servo press with variable inertia flywheel are as follows: S1, starting the energy storage servo motor (2) to drive the eccentric variable moment of inertia flywheel (6) to rotate, when the eccentric variable moment of inertia flywheel (6) reaches a specified speed; S2, starting the main servo motor (21), driving the crankshaft (17) to rotate through the setting of gear three (19) and gear two (13), completing the uniform rotation stage of 0°-150°; S3, when the crankshaft position sensor (31) detects that the crankshaft (17) rotates close to 150°, the crankshaft position sensor (31) sends information to decelerate the main servo motor (21) to complete the deceleration rotation stage of 150°-161°, and at the same time, the eccentric adjustment mechanism on the eccentric variable moment of inertia flywheel (6) is started to increase the moment of inertia of the flywheel, thereby reducing the rotation speed of the flywheel, and at the same time, the friction clutch (34) reaches the engaged state, and the rotational kinetic energy is transmitted to the friction clutch (34) through the gas and liquid rotary joint (14) and the clutch engagement power hole (15). Through the engaged state effect of the friction clutch (34), the energy stored in the eccentric variable moment of inertia flywheel (6) is released and transmitted to the crankshaft (17) through the transmission shaft (8), gear one (12), gear two (13) and a plurality of flat keys; S4, the rotational kinetic energy released by the eccentric variable inertia flywheel (6) and the rotational kinetic energy of the main servo motor (21) act together on the crankshaft (17), and finally provide energy for the nominal pressure stroke of the slider (24) at the same time, completing the nominal pressure stroke stage of 161°-180°; S5, when the crankshaft position sensor (31) detects that the crankshaft (17) rotates close to 180°, the crankshaft position sensor (31) sends information to cancel the clutch power transmitted to the friction clutch (34) through the gas / liquid rotary joint (14) and the clutch suction power hole (15), so that the friction clutch (34) is disengaged from the eccentric variable rotational inertia flywheel (6), and the eccentric variable rotational inertia flywheel (6) is driven by the energy storage servo motor (2) to restore the energy storage and idling state, and at the same time, the eccentric adjustment mechanism on the eccentric variable rotational inertia flywheel (6) is started to minimize the rotational inertia of the flywheel, and then the main servo motor (21) is used to accelerate the rotation, completing the 180° to 190° crankshaft (17) speed increase rotation stage; S6. When the servo press is in continuous working mode, when the crankshaft position sensor (31) detects that the crankshaft (17) rotates to nearly 190°, the crankshaft position sensor (31) sends information, and the main servo motor (21) completes the uniform speed rotation stage from 190° to 360°.

2. The method for using a servo press with a variable moment of inertia flywheel according to claim 1, characterized in that: The step S6 also includes the following steps: S61, when the servo press is in single working mode, when the crankshaft position sensor (31) detects that the crankshaft (17) rotates to nearly 360 degrees, the crankshaft position sensor (31) sends information to adjust the main servo motor (21) to reduce the speed until it stops rotating, and at the same time activates the brake clutch device (29) to ensure that the crankshaft (17) can stably stop at the top dead center position.

3. The method for using a servo press with a variable moment of inertia flywheel according to claim 1, characterized in that: The friction clutch (34) includes an engaged state and a disengaged state. When the friction clutch (34) is in the engaged state, the rotational kinetic energy of the eccentric variable moment of inertia flywheel (6) is transmitted to the transmission shaft (8) through the second flat key (7). When the friction clutch (34) is in the disengaged state, the eccentric variable moment of inertia flywheel (6) performs idling motion around the transmission shaft (8) under the support of the first rolling bearing (9).

4. The method for using a servo press with a variable moment of inertia flywheel according to claim 1, characterized in that: The main power and crankshaft connecting rod mechanism comprises a first bearing (16), and the outer wall of the first bearing (16) is mounted on the inner wall of the fuselage (1), and the inner wall of the first bearing (16) is mounted on the outer wall of the crankshaft (17).

5. The method for using a servo press with a variable moment of inertia flywheel according to claim 1, characterized in that: The working mechanism comprises a connecting rod (22), one end of the connecting rod (22) is mounted on the output end of the crankshaft (17) via a rotating shaft, a ball head connecting rod (23) is mounted at the bottom of the connecting rod (22), one end of the ball head connecting rod (23) is connected to a slider (24), an upper die (25) is mounted at the bottom of the slider (24), and an outer wall of the slider (24) is movably connected to an inner wall of a guide rail (26).

6. The method for using a servo press with a variable moment of inertia flywheel according to claim 5, characterized in that: A lower die (27) is placed directly below the upper die (25), and a workbench (28) is installed at the bottom of the lower die (27).

7. The method for using a servo press with a variable moment of inertia flywheel according to claim 1, characterized in that: The braking mechanism comprises a braking clutch device (29), and the inner wall of the braking clutch device (29) is mounted on the outer wall of the crankshaft (17).

8. The method for using a servo press with a variable moment of inertia flywheel according to claim 1, characterized in that: The position detection mechanism comprises an eccentric position sensor (30) and a crankshaft position sensor (31); the eccentric position sensor (30) is used to detect the eccentric position of an eccentric block on an eccentric variable moment of inertia flywheel (6); and the crankshaft position sensor (31) is used to detect the position of a crankshaft (17) or a slider (24).

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