CN210358663U - Full electric servo synchronous bending machine based on torsion shaft structure - Google Patents
Full electric servo synchronous bending machine based on torsion shaft structure Download PDFInfo
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- CN210358663U CN210358663U CN201921157666.2U CN201921157666U CN210358663U CN 210358663 U CN210358663 U CN 210358663U CN 201921157666 U CN201921157666 U CN 201921157666U CN 210358663 U CN210358663 U CN 210358663U
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Abstract
The utility model discloses a full electric servo synchronous bending machine based on a torsion shaft structure, which comprises a frame, a lower die fixedly connected with the frame and used for bending, a slider capable of moving up and down along the frame, and an upper die fixedly connected with the slider and matched with the lower die for bending, wherein the slider is symmetrically connected with a driving mechanism for driving the slider to realize speed ratio adjustable movement; the frame comprises two frame side plates which are symmetrically arranged, a frame bottom plate which is positioned below and used for fixing the lower die, and a frame cross beam piece which is used for connecting the two frame side plates. The utility model discloses be fit for the large-tonnage, can realize that the velocity ratio is adjustable and utilize link mechanism's nonlinear motion characteristic and specific position's auto-lock characteristic simultaneously.
Description
Technical Field
The utility model relates to a panel bender especially relates to a complete electric servo synchronous bender based on torsion bar structure.
Background
The numerical control bending machine is the most important and basic equipment in the field of metal plate processing, and energy conservation, environmental protection, high speed, high precision, digitalization and intellectualization are the development trends in the future. The driving modes of the numerical control bending machine include hydraulic driving and mechanical and electrical servo driving, and at present, the hydraulic driving mode is mainly used, but the mechanical and electrical servo driving is a future development trend.
The hydraulic drive has the advantages of large tonnage and easy realization of bending processing of large-breadth thick plates; the disadvantages of hydraulic drives are the following: 1. large noise, high energy consumption, hydraulic oil leakage and environmental pollution; 2. the cost is high, and high-precision parts such as a hydraulic oil cylinder, a valve bank, a hydraulic pump and the like have high cost, wherein the high-end market of the valve bank and the hydraulic pump almost completely depends on import, and the cost is high; 3. the precision is not high, the position precision control of the hydraulic system has inherent disadvantages, and the position controllability is poor; 4. the service life is short, components are worn, and the hydraulic oil circuit is polluted, so that the stability of a hydraulic system is easily influenced; 5. the action impact of the slide block is large and not gentle; 6. the influence of factors such as environmental temperature, humidity and dust is large; 7. the motion control is complicated.
The mechanical-electric servo can solve the defects of the hydraulic driving mode, but the mechanical-electric servo driving mode has technical bottlenecks, so that the mechanical-electric servo is only applied to the field of small tonnage at present and generally does not exceed 50 tons. The existing small-tonnage mechanical all-electric servo bending driving mode is shown in fig. 1 and fig. 2, a heavy-duty ball screw driving mode is mostly adopted, and the small-tonnage mechanical all-electric servo bending driving mode mainly comprises a servo motor a, a synchronous belt transmission b, a ball screw transmission c, a sliding block d, a workbench e and the like. The servo motor is fixed on the rack, the ball screw is hinged with the rack, the sliding block is connected with the rack in a sliding mode and can slide along the upper direction and the lower direction of the rack, and the workbench is fixed on the rack. The synchronous belt transmission consists of a small belt wheel, a synchronous belt and a large belt wheel, and plays roles in speed reduction and transmission. The slide block is driven by the ball screw transmission pair, the servo motor drives the screw to rotate through the synchronous belt, and the slide block moves up and down under the driving of the ball screw transmission pair. The sliding block d moves up and down relative to the workbench e, the upper die f is installed on the sliding block, and the lower die g is installed on the workbench, so that the bending processing of the plate h can be realized. The slide block is symmetrically driven by the left screw and the right screw, so that on one hand, the load is large, the rigidity is high, and on the other hand, when a parallelism error occurs between the upper die and the lower die, the parallelism fine adjustment can be realized through the reverse rotation of the left motor and the right motor.
The mechanical full-electric servo bending machine driven by the ball screw has the advantages of simple structure, high mechanical transmission efficiency, high speed and high precision, and effectively solves the problems of hydraulic transmission; the disadvantages are as follows: 1. the cost is high, the high-precision and heavy-load ball screw basically depends on import, and the price is high; 2. the machining and manufacturing precision of the machine tool is high; 3. the bending machine is only suitable for small-tonnage bending machines; 4. the power utilization rate is low, the required driving motor power is large, and the cost is high; 5. the lead screw is easily worn and damaged.
The power utilization rate and the power consumed by the servo motor in the actual use process are determined by the load, and the ratio of the power consumed in the actual use process to the maximum power index (or rated power) which can be reached by the motor can be used as the power utilization rate. Generally, the bending machine successively undergoes three action stages in the process of bending the plate: 1. in the fast descending stage, the slide block moves downwards from the upper dead point until the upper die contacts the plate, and the speed is high in the stage and the load is small; the speed is generally in the range of 150 mm/s-200 mm/s, the load basically overcomes the gravity of the sliding block, the gravity of the sliding block is generally not more than 1/50 of the nominal bending force of the bending machine, and therefore the load is very small; this phase is typically high speed, low load; 2. in the working-in stage, the bending machine bends the plate, which is a typical low-speed and large-load stage, the speed is about 20mm/s, and the speed is about 1/10 of the fast-down speed; 3. and in the return stage, after the plate is bent, the sliding block moves upwards and returns to the top dead center, and the speed and the load of the sliding block are the same as those in the fast-down stage, and the sliding block is high-speed and low-load.
From the above, the working condition of the bending machine is the typical variable speed and variable load working condition. Because the transmission ratio of the ball screw transmission is fixed, the servo motor is in the fast descending stageHas reached the highest rotating speed nmaxBut peak torque MmaxFar from this, according to empirical data, generally 1/50, which is only the peak torque, the load can be directly equivalent to the output torque of the motor, and then the power consumed by the motor corresponding to the fast-down phase is:
and in the working stage, the motor reaches the peak torque MmaxHowever, according to empirical data, the rotational speed of the motor is only the maximum rotational speed nmax1/10, mainly considering safety factors, the working speed of the bending machine is generally low, and the power required by the motor at this stage is as follows:
therefore, the driving system needs to meet the requirement of the highest rotating speed at the fast descending stage and the return stroke stage, and simultaneously needs to meet the requirement of the peak torque at the working process stage; then, with a fixed transmission ratio, the peak power: pmax＝nmax×Mmax. The required power of the driving motor is very large, and even in the actual use process, the highest peak power is not used by the motor, so that the power of the motor is not completely applied, namely, the power utilization rate is low. Taking a 35-ton mechanical-electric servo bending machine commonly available in the market as an example, the fast down speed and the return speed are generally 200mm/s, the nominal bending force is 350kN, in order to meet the requirements of the highest speed and the maximum bending force at the same time, 2 7.5kW servo motors are generally needed, and the conventional configuration of the market is adopted at present, but in the actual working process, the actually consumed power of the two servo motors is approximately 1 kW-2 kW, and the utilization rate of the power is very low.
Therefore, it is desired to solve the above problems.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model aims at providing a be fit for the large-tonnage, can realize that the slider has nonlinear motion and mechanical properties and utilizes the nonlinear motion characteristic of link mechanism and the auto-lock characteristic based on torsion bar structure's full electric servo synchronous bender of specific position simultaneously.
The technical scheme is as follows: in order to achieve the purpose, the utility model discloses a full electric servo synchronous bending machine based on a torsion shaft structure, which comprises a frame, a lower die fixedly connected with the frame and used for bending, a slide block capable of moving up and down along the frame, and an upper die fixedly connected with the slide block and matched with the lower die for bending, wherein the slide block is symmetrically connected with a driving mechanism used for driving the slide block to realize speed ratio adjustable movement; the frame comprises two frame side plates which are symmetrically arranged, a frame bottom plate which is positioned below and used for fixing the lower die, and a frame cross beam piece which is used for connecting the two frame side plates.
The driving mechanism comprises a power assembly positioned on the rack, a screw driven by the power assembly, a nut in threaded fit with the screw, a rotatable torsion shaft which is arranged perpendicular to the surface of the sliding block and is hinged on the rack, a first crank with one end hinged with the nut and the other end fixedly connected with the torsion shaft, and a second crank with one end fixedly connected with the torsion shaft and the other end hinged with the sliding block through a first connecting rod; the power assembly outputs power to drive the screw to rotate, drives the nut to move through the transmission of the thread pair, and drives the sliding block to move up and down through the first crank, the torsion shaft, the second crank and the first connecting rod in sequence.
Preferably, the driving mechanism comprises a power assembly positioned on the rack, a screw driven by the power assembly, a nut in threaded fit with the screw, a tripod with one end hinged with the nut and one end hinged with the rack, a rotatable torsion shaft arranged perpendicular to the surface of the sliding block and hinged with the rack, a first crank with one end fixedly connected with the torsion shaft and the other end hinged with the tripod through a second connecting rod, and a second crank with one end fixedly connected with the torsion shaft and the other end hinged with the sliding block through the first connecting rod; the power component outputs power to drive the screw rod to rotate, the nut is driven to move through the transmission of the thread pair, and the sliding block is driven to move up and down through the triangular frame, the second connecting rod, the first crank, the torsion shaft, the second crank and the first connecting rod in sequence.
Furthermore, the driving mechanism comprises a power assembly positioned on the rack, a third crank driven by the power assembly, a fourth connecting rod connected with a third crank rotating pair, a rotatable torsion shaft which is arranged perpendicular to the surface of the sliding block and is hinged on the rack, a first crank with one end hinged with the fourth connecting rod and the other end fixedly connected with the torsion shaft, and a second crank with one end fixedly connected with the torsion shaft and the other end hinged with the sliding block through the first connecting rod; the power assembly outputs power to drive the third crank to rotate, and the third crank drives the sliding block to move up and down sequentially through the fourth connecting rod, the first crank, the torsion shaft, the second crank and the first connecting rod.
Furthermore, the driving mechanism comprises a power component positioned on the rack, a third crank driven by the power component, a fourth connecting rod connected with a third crank rotating pair, a tripod with one end hinged with the fourth connecting rod and one end hinged with the rack, a rotatable torsion shaft arranged perpendicular to the surface of the sliding block and hinged on the rack, a first crank with one end fixedly connected with the torsion shaft and the other end hinged with the tripod through a second connecting rod, and a second crank with one end fixedly connected with the torsion shaft and the other end hinged with the sliding block through the first connecting rod; the power assembly outputs power to drive the third crank to rotate, and the third crank drives the sliding block to move up and down sequentially through the fourth connecting rod, the tripod, the second connecting rod, the first crank, the torsion shaft, the second crank and the first connecting rod.
Preferably, the power assembly comprises a servo motor positioned on the rack, a small belt wheel positioned on an output shaft of the servo motor, a large belt wheel coaxially and fixedly connected with the screw rod, and a synchronous belt wound on the small belt wheel and the large belt wheel for transmission.
Preferably, the power assembly comprises a servo motor positioned on the rack, a small belt wheel positioned on an output shaft of the servo motor, a large belt wheel coaxially and fixedly connected with the third crank, and a synchronous belt wound on the small belt wheel and the large belt wheel for transmission.
Furthermore, the rack is hinged with a fixed seat for arranging a power assembly, and the screw rod is hinged with the fixed seat through a bearing.
Furthermore, the nut is hinged with the first crank through the connecting seat.
Preferably, the nut is hinged with the tripod through the connecting seat.
Has the advantages that: compared with the prior art, the utility model has the advantages of it is following:
(1) the utility model makes full use of the nonlinear motion characteristic of the link mechanism, and adopts the driving mechanism to realize the fast-down, work-in and return actions of the bending machine according to the actual working condition characteristics of the numerical control bending machine; in the fast descending and returning stages, the driving mechanism has the characteristics of high speed and small load, and the driving mechanism has the characteristics of low speed and large load in the working process stage; the performance is effectively improved, the cost is reduced, high-speed and heavy load is realized, and the method has important significance for promoting the development of a numerical control bending machine from a traditional hydraulic driving mode to a mechanical electric servo driving mode.
(2) The utility model discloses in because of link mechanism's nonlinear motion characteristic, under servo motor at the uniform velocity rotation condition, link mechanism is lower at its upper and lower dead point position's speed, and higher, the action is mild, do not have the impact at intermediate position speed.
(3) The utility model greatly improves the power utilization rate of the servo motor by utilizing the nonlinear motion and the mechanical characteristics of high-speed light load and low-speed heavy load, thereby realizing a heavy-load large-tonnage bending machine and overcoming the technical bottleneck in the industry;
(4) the utility model greatly improves the power utilization rate of the servo motor, the bending machine with the same tonnage can adopt a smaller driving motor, does not need expensive heavy-load and high-precision ball screws, and uses common parts such as cranks, connecting rods and the like, thereby effectively reducing the manufacturing cost, and having no maintenance and high reliability;
(5) the utility model utilizes 2 servo motors which are arranged symmetrically left and right to asynchronously operate to adjust the parallelism deviation of the upper die and the lower die, so that the left side and the right side of the lower sliding block are not parallel, and the bending with taper can be realized;
(6) the second crank and the first connecting rod of the utility model are symmetrically arranged, the horizontal component force generated by the mechanism can be mutually offset, and the mechanism is prevented from bearing the lateral force;
(7) the utility model discloses the stress point of mechanism, the articulated position of twist shaft and frame and the pin joint of second crank and frame promptly all about fuselage curb plate central symmetry, therefore the fuselage curb plate only bears the load along the face direction, avoids fuselage curb plate atress warpage.
Drawings
FIG. 1 is a schematic diagram of a bending machine in the prior art;
FIG. 2 is a schematic view of a prior art bending of a sheet material;
fig. 3 is a schematic diagram of embodiment 1 of the present invention;
fig. 4 is a first schematic structural diagram of embodiment 1 of the present invention;
fig. 5 is a schematic structural diagram of embodiment 1 of the present invention;
fig. 6 is a schematic structural view of the present invention with a frame removed according to embodiment 1;
fig. 7 is a schematic diagram of embodiment 2 of the present invention;
fig. 8 is a first schematic structural diagram of embodiment 2 of the present invention;
fig. 9 is a second schematic structural diagram of embodiment 2 of the present invention;
fig. 10 is a schematic structural view of the present invention with a frame removed according to embodiment 2;
fig. 11 is a schematic diagram of embodiment 3 of the present invention;
fig. 12 is a first schematic structural diagram of embodiment 3 of the present invention;
fig. 13 is a second schematic structural view of embodiment 3 of the present invention;
fig. 14 is a schematic structural view of the present invention with a frame removed according to embodiment 3;
fig. 15 is a schematic view of embodiment 4 of the present invention;
fig. 16 is a first schematic structural diagram of embodiment 4 of the present invention;
fig. 17 is a second schematic structural view of embodiment 4 of the present invention;
fig. 18 is a schematic structural view of the present invention with a frame removed according to embodiment 4;
fig. 19 is a schematic view of the non-linear motion characteristic of the link mechanism according to the present invention;
fig. 20 is a schematic diagram of the force applied to the middle slider of the present invention.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings.
Example 1
As shown in fig. 3, the utility model relates to a full electric servo synchronous bender based on torsion bar structure, including frame 1, lower mould 2, slider 3 and lower mould 4. The slide block 3 can move up and down along the machine frame 1. Go up mould 4 and fixed the setting on slider 3, lower mould 2 is fixed to be set up in frame 1, goes up mould 4 and lower mould 2 and mutually supports the realization and bend. The frame 1 comprises two frame side plates which are symmetrically arranged, a frame bottom plate which is positioned below and used for fixing the lower die, and a frame cross beam piece which is used for connecting the two frame side plates, wherein the cross section of the frame cross beam piece is of a U-shaped structure.
As shown in fig. 4, 5 and 6, the slide block 3 is symmetrically connected with a driving mechanism for driving the slide block to realize the adjustable movement of the speed ratio. The driving mechanism comprises a power assembly, a screw 5, a nut 6, a torsion shaft 7, a first crank 8, a first connecting rod 9 and a second crank 10. The frame 1 is hinged with a fixed seat 19, and the screw 5 passes through the fixed seat 19 and is hinged with the fixed seat 19 through a bearing. The power assembly comprises a servo motor positioned on the fixed seat 19, a small belt wheel 16 positioned on an output shaft of the servo motor, a large belt wheel 17 coaxially and fixedly connected with the screw rod, and a synchronous belt 18 wound on the small belt wheel and the large belt wheel for transmission. The screw rod 5 is coaxially and fixedly connected with the large belt wheel 17 and is driven to rotate by a servo motor through belt transmission, the nut 6 is in threaded fit with the screw rod 5, the nut 6 is fixedly connected with the connecting seat 20, the connecting seat 20 is hinged to one end of the first crank 8, the other end of the first crank 8 is fixedly connected with one end of the torsion shaft, the other end of the torsion shaft is fixedly connected with one end of the second crank, and the other end of the second crank is hinged to the sliding block 3 through the first connecting rod 9. The servo motor outputs power, the large belt wheel is driven to rotate together with the screw rod through synchronous belt transmission, the nut 6 is driven to move through thread pair transmission, and the sliding block 3 is driven to move up and down through the first crank 8, the torsion shaft 7, the second crank 10 and the first connecting rod 9 in sequence. The utility model discloses the depth of parallelism deviation of the adjustable mould of going up of servo motor asynchronous operation that well usable 2 bilateral symmetry set up and lower mould makes the left and right sides nonparallel of lower slider, can realize taking tapered bending.
As shown in fig. 19, the working condition of the bending machine is a typical variable speed and variable load working condition, the fast descending and returning phases are high-speed and low-load large-stroke movement phases, and the working advancing phase is a low-speed and large-load small-stroke movement phase. Therefore, the utility model makes full use of the typical non-linear motion characteristic of the link mechanism and the self-locking position of the mechanism when the slide block is positioned at the upper dead point and the lower dead point, realizes high-speed motion and low-load output in the non-working stroke, namely the fast-down and return stages, and realizes heavy-load output and low-speed motion in the working stroke; therefore, the power of the driving motor is greatly reduced, and the problem that the speed ratio of a ball screw driving mode is not adjustable is solved. The utility model discloses in can enlarge 3-5 times with the drive power of screw rod through link mechanism, can realize the mechanical electric servo bender of large-tonnage. As shown in fig. 20, in the present invention, the second crank and the first connecting rod are symmetrically arranged, so that the horizontal component force generated by the mechanism can be offset, and the mechanism is prevented from bearing the lateral force.
Example 2
As shown in fig. 7, the utility model relates to a full electric servo synchronous bender based on torsion bar structure, including frame 1, lower mould 2, slider 3 and lower mould 4. The slide block 3 can move up and down along the machine frame 1. Go up mould 4 and fixed the setting on slider 3, lower mould 2 is fixed to be set up in frame 1, goes up mould 4 and lower mould 2 and mutually supports the realization and bend. The frame 1 comprises two frame side plates which are symmetrically arranged, a frame bottom plate which is positioned below and used for fixing the lower die, and a frame cross beam piece which is used for connecting the two frame side plates, wherein the cross section of the frame cross beam piece is of a U-shaped structure.
As shown in fig. 8, 9 and 10, the slide block 3 is symmetrically connected with a driving mechanism for driving the slide block to realize the adjustable movement of the speed ratio. The driving mechanism comprises a power assembly, a screw 5, a nut 6, a torsion shaft 7, a first crank 8, a first connecting rod 9, a second crank 10, a tripod 11 and a second connecting rod 12. The frame 1 is hinged with a fixed seat 19, and the screw 5 passes through the fixed seat 19 and is hinged with the fixed seat 19 through a bearing. The power assembly comprises a servo motor positioned on the fixed seat 19, a small belt wheel 16 positioned on an output shaft of the servo motor, a large belt wheel 17 coaxially and fixedly connected with the screw rod, and a synchronous belt 18 wound on the small belt wheel and the large belt wheel for transmission. The utility model discloses a power component is located the frame lower part, and the focus is low, has effectively improved the stability of the whole equipment of bender. The screw rod 5 is coaxially and fixedly connected with the large belt wheel 17 and is driven to rotate by a servo motor through belt transmission, the nut 6 is in threaded fit with the screw rod 5, the nut 6 is fixedly connected with the connecting seat 20, the connecting seat 20 is hinged to one end of the tripod 11, one end of the tripod 11 is hinged to the rack, and the other end of the tripod 11 is hinged to one end of the second connecting rod 12. The other end of the second connecting rod 12 is hinged with one end of the first crank 8, the other end of the first crank 8 is fixedly connected with one end of the torsion shaft, the other end of the torsion shaft is fixedly connected with one end of the second crank, and the other end of the second crank is hinged with the sliding block 3 through the first connecting rod 9. The servo motor outputs power, the large belt wheel is driven to rotate together with the screw rod through synchronous belt transmission, the nut 6 is driven to move through thread pair transmission, and the sliding block 3 is driven to move up and down through the triangular frame 11, the second connecting rod 12, the first crank 8, the torsion shaft 7, the second crank 10 and the first connecting rod 9 in sequence. The utility model discloses the depth of parallelism deviation of the adjustable mould of going up of servo motor asynchronous operation that well usable 2 bilateral symmetry set up and lower mould makes the left and right sides nonparallel of lower slider, can realize taking tapered bending.
As shown in fig. 19, the working condition of the bending machine is a typical variable speed and variable load working condition, the fast descending and returning phases are high-speed and low-load large-stroke movement phases, and the working advancing phase is a low-speed and large-load small-stroke movement phase. Therefore, the utility model makes full use of the typical non-linear motion characteristic of the link mechanism and the self-locking position of the mechanism when the slide block is positioned at the upper dead point and the lower dead point, realizes high-speed motion and low-load output in the non-working stroke, namely the fast-down and return stages, and realizes heavy-load output and low-speed motion in the working stroke; therefore, the power of the driving motor is greatly reduced, and the problem that the speed ratio of a ball screw driving mode is not adjustable is solved. The utility model discloses in can enlarge 3-5 times with the drive power of screw rod through link mechanism, can realize the mechanical electric servo bender of large-tonnage.
Example 3
As shown in fig. 11, the utility model relates to a full electric servo synchronous bender based on torsion bar structure, including frame 1, lower mould 2, slider 3 and lower mould 4. The slide block 3 can move up and down along the machine frame 1. Go up mould 4 and fixed the setting on slider 3, lower mould 2 is fixed to be set up in frame 1, goes up mould 4 and lower mould 2 and mutually supports the realization and bend. The frame 1 comprises two frame side plates which are symmetrically arranged, a frame bottom plate which is positioned below and used for fixing the lower die, and a frame cross beam piece which is used for connecting the two frame side plates, wherein the cross section of the frame cross beam piece is of a U-shaped structure.
As shown in fig. 12, 13 and 14, the slide block 3 is symmetrically connected with a driving mechanism for driving the slide block to realize the adjustable movement of the speed ratio. The driving mechanism comprises a power assembly, a third crank 13, a fourth connecting rod 14, a torsion shaft 7, a first crank 8, a first connecting rod 9 and a second crank 10. The power component comprises a servo motor, a small belt wheel 16 positioned on an output shaft of the servo motor, a large belt wheel 17 coaxially and fixedly connected with the third crank, and a synchronous belt 18 wound on the small belt wheel and the large belt wheel for transmission. The third crank 13 is coaxially and fixedly connected with the large belt wheel 17 and is driven to rotate by a servo motor through belt transmission, or the third crank 13 is directly arranged on an output shaft of the servo motor and is directly driven to rotate by the servo motor. The third crank 13 is connected with a revolute pair at one end of a fourth connecting rod 14, the other end of the fourth connecting rod 14 is hinged with one end of the first crank 8, the other end of the first crank 8 is fixedly connected with one end of a torsion shaft, the other end of the torsion shaft is fixedly connected with one end of a second crank, and the other end of the second crank is hinged with the sliding block 3 through a first connecting rod 9. The servo motor outputs power, drives the large belt wheel to rotate together with the third crank 13 through synchronous belt transmission, drives the fourth connecting rod to move through the revolute pair, and drives the sliding block 3 to move up and down through the first crank 8, the torsion shaft 7, the second crank 10 and the first connecting rod 9 in sequence. The utility model discloses the depth of parallelism deviation of the adjustable mould of going up of servo motor asynchronous operation that well usable 2 bilateral symmetry set up and lower mould makes the left and right sides nonparallel of lower slider, can realize taking tapered bending.
As shown in fig. 19, the working condition of the bending machine is a typical variable speed and variable load working condition, the fast descending and returning phases are high-speed and low-load large-stroke movement phases, and the working advancing phase is a low-speed and large-load small-stroke movement phase. Therefore, the utility model makes full use of the typical non-linear motion characteristic of the link mechanism and the self-locking position of the mechanism when the slide block is positioned at the upper dead point and the lower dead point, realizes high-speed motion and low-load output in the non-working stroke, namely the fast-down and return stages, and realizes heavy-load output and low-speed motion in the working stroke; therefore, the power of the driving motor is greatly reduced, and the problem that the speed ratio of a ball screw driving mode is not adjustable is solved. The utility model discloses in can enlarge 3-5 times with the drive power of screw rod through link mechanism, can realize the mechanical electric servo bender of large-tonnage.
Example 4
As shown in fig. 15, the utility model relates to a full electric servo synchronous bender based on torsion bar structure, including frame 1, lower mould 2, slider 3 and lower mould 4. The slide block 3 can move up and down along the machine frame 1. Go up mould 4 and fixed the setting on slider 3, lower mould 2 is fixed to be set up in frame 1, goes up mould 4 and lower mould 2 and mutually supports the realization and bend. The frame 1 comprises two frame side plates which are symmetrically arranged, a frame bottom plate which is positioned below and used for fixing the lower die, and a frame cross beam piece which is used for connecting the two frame side plates, wherein the cross section of the frame cross beam piece is of a U-shaped structure.
As shown in fig. 16, 17 and 18, the slide block 3 is symmetrically connected with a driving mechanism for driving the slide block to realize the adjustable movement of the speed ratio. The driving mechanism comprises a power assembly, a third crank 13, a fourth connecting rod 14, a torsion shaft 7, a first crank 8, a first connecting rod 9, a second crank 10, a tripod 11 and a second connecting rod 12. The power component comprises a servo motor, a small belt wheel 16 positioned on an output shaft of the servo motor, a large belt wheel 17 coaxially and fixedly connected with the third crank, and a synchronous belt 18 wound on the small belt wheel and the large belt wheel for transmission. The third crank 13 is coaxially and fixedly connected with the large belt wheel 17 and is driven to rotate by a servo motor through belt transmission, or the third crank 13 is directly arranged on an output shaft of the servo motor and is directly driven to rotate by the servo motor. The third crank 13 is connected with a revolute pair at one end of a fourth connecting rod 14, the other end of the fourth connecting rod 14 is hinged with one end of a tripod 11, one end of the tripod 11 is hinged with the frame, and the other end of the tripod 11 is hinged with one end of a second connecting rod 12. The other end of the second connecting rod 12 is hinged with one end of the first crank 8, the other end of the first crank 8 is fixedly connected with one end of the torsion shaft, the other end of the torsion shaft is fixedly connected with one end of the second crank, and the other end of the second crank is hinged with the sliding block 3 through the first connecting rod 9. The servo motor outputs power, the large belt wheel is driven to rotate together with the third crank through synchronous belt transmission, the fourth connecting rod 14 is driven to move through the revolute pair, and the sliding block 3 is driven to move up and down through the tripod 11, the second connecting rod 12, the first crank 8, the torsion shaft 7, the second crank 10 and the first connecting rod 9 in sequence. The utility model discloses the depth of parallelism deviation of the adjustable mould of going up of servo motor asynchronous operation that well usable 2 bilateral symmetry set up and lower mould makes the left and right sides nonparallel of lower slider, can realize taking tapered bending.
As shown in fig. 19, the working condition of the bending machine is a typical variable speed and variable load working condition, the fast descending and returning phases are high-speed and low-load large-stroke movement phases, and the working advancing phase is a low-speed and large-load small-stroke movement phase. Therefore, the utility model makes full use of the typical non-linear motion characteristic of the link mechanism and the self-locking position of the mechanism when the slide block is positioned at the upper dead point and the lower dead point, realizes high-speed motion and low-load output in the non-working stroke, namely the fast-down and return stages, and realizes heavy-load output and low-speed motion in the working stroke; therefore, the power of the driving motor is greatly reduced, and the problem that the speed ratio of a ball screw driving mode is not adjustable is solved. The utility model discloses in can enlarge 3-5 times with the drive power of screw rod through link mechanism, can realize the mechanical electric servo bender of large-tonnage.
Claims (10)
1. The utility model provides a full electric servo synchronous bender based on torsion bar structure which characterized in that: the bending machine comprises a rack (1), a lower die (2) fixedly connected with the rack and used for bending, a sliding block (3) capable of moving up and down along the rack, and an upper die (4) fixedly connected with the sliding block and matched with the lower die for bending, wherein two groups of driving mechanisms used for driving the sliding block to realize the nonlinear motion characteristic are symmetrically connected to the left and the right of the sliding block (3); the frame (1) comprises two symmetrically arranged frame side plates, a frame bottom plate and a frame cross beam piece, wherein the frame bottom plate is located below the frame side plates and used for fixing the lower die, and the frame cross beam piece is used for connecting the two frame side plates.
2. The fully electric servo synchronous bending machine based on the torsion shaft structure according to claim 1, is characterized in that: the driving mechanism comprises a power assembly positioned on the rack, a screw (5) driven by the power assembly, a nut (6) in threaded fit with the screw, a rotatable torsion shaft (7) which is arranged perpendicular to the surface of the sliding block and is hinged on the rack, a first crank (8) with one end hinged with the nut and the other end fixedly connected with the torsion shaft, and a second crank (10) with one end fixedly connected with the torsion shaft and the other end hinged with the sliding block through a first connecting rod (9); the power component outputs power to drive the screw (5) to rotate, drives the nut (6) to move through the transmission of the thread pair, and drives the sliding block (3) to move up and down through the first crank (8), the torsion shaft (7), the second crank (10) and the first connecting rod (9) in sequence.
3. The fully electric servo synchronous bending machine based on the torsion shaft structure according to claim 1, is characterized in that: the driving mechanism comprises a power component positioned on the rack, a screw rod (5) driven by the power component, a nut (6) in threaded fit with the screw rod, a tripod (11) with one end hinged with the nut and one end hinged with the rack, a rotatable torsion shaft (7) which is arranged perpendicular to the surface of the sliding block and hinged with the rack, a first crank (8) with one end fixedly connected with the torsion shaft and the other end hinged with the tripod through a second connecting rod (12), and a second crank (10) with one end fixedly connected with the torsion shaft and the other end hinged with the sliding block through a first connecting rod (9); the power component outputs power to drive the screw (5) to rotate, drives the nut (6) to move through thread pair transmission, and drives the sliding block (3) to move up and down through the tripod (11), the second connecting rod (12), the first crank (8), the torsion shaft (7), the second crank (10) and the first connecting rod (9) in sequence.
4. The fully electric servo synchronous bending machine based on the torsion shaft structure according to claim 1, is characterized in that: the driving mechanism comprises a power assembly positioned on the rack, a third crank (13) driven by the power assembly, a fourth connecting rod (14) connected with a third crank revolute pair, a rotatable torsion shaft (7) which is perpendicular to the surface of the sliding block and is hinged on the rack, a first crank (8) with one end hinged with the fourth connecting rod and the other end fixedly connected with the torsion shaft, and a second crank (10) with one end fixedly connected with the torsion shaft and the other end hinged with the sliding block through a first connecting rod (9); the power assembly outputs power to drive the third crank (13) to rotate, and the sliding block (3) is driven to move up and down through the fourth connecting rod (14), the first crank (8), the torsion shaft (7), the second crank (10) and the first connecting rod (9) in sequence.
5. The fully electric servo synchronous bending machine based on the torsion shaft structure according to claim 1, is characterized in that: the driving mechanism comprises a power component positioned on the rack, a third crank (13) driven by the power component, a fourth connecting rod (14) connected with a third crank revolute pair, a tripod (11) with one end hinged with the fourth connecting rod and one end hinged with the rack, a rotatable torsion shaft (7) arranged perpendicular to the surface of the sliding block and hinged on the rack, a first crank (8) with one end fixedly connected with the torsion shaft and the other end hinged with the tripod through a second connecting rod (12), and a second crank (10) with one end fixedly connected with the torsion shaft and the other end hinged with the sliding block through a first connecting rod (9); the power component outputs power to drive the third crank (13) to rotate, and drives the sliding block (3) to move up and down sequentially through the fourth connecting rod (14), the tripod (11), the second connecting rod (12), the first crank (8), the torsion shaft (7), the second crank (10) and the first connecting rod (9).
6. A fully electric servo synchronous bending machine based on a torsion shaft structure according to claim 2 or 3, characterized in that: the power assembly comprises a servo motor (15) positioned on the rack, a small belt wheel (16) positioned on an output shaft of the servo motor, a large belt wheel (17) coaxially and fixedly connected with the screw rod, and a synchronous belt (18) wound on the small belt wheel and the large belt wheel for transmission.
7. A fully electric servo synchronous bending machine based on a torsion shaft structure according to claim 4 or 5, characterized in that: the power assembly comprises a servo motor (15) positioned on the rack, a small belt wheel (16) positioned on an output shaft of the servo motor, a large belt wheel (17) coaxially and fixedly connected with the third crank, and a synchronous belt (18) wound on the small belt wheel and the large belt wheel for transmission.
8. A fully electric servo synchronous bending machine based on a torsion shaft structure according to claim 2 or 3, characterized in that: the frame (1) is hinged with a fixed seat (19) used for setting a power assembly, and the screw rod (5) is hinged with the fixed seat (19) through a bearing.
9. The fully electric servo synchronous bending machine based on the torsion shaft structure according to claim 2, is characterized in that: the nut (6) is hinged with the first crank (8) through the connecting seat (20).
10. The fully electric servo synchronous bending machine based on the torsion shaft structure according to claim 3, is characterized in that: the nut (6) is hinged with the tripod (11) through the connecting seat (20).
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| CN201921157666.2U CN210358663U (en) | 2019-07-22 | 2019-07-22 | Full electric servo synchronous bending machine based on torsion shaft structure |
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Assignee: Zhangjiagang Institute of Zhangjiagang Assignor: NANJING University OF POSTS AND TELECOMMUNICATIONS Contract record no.: X2020980007094 Denomination of utility model: All electric servo synchronous bending machine based on torsion shaft structure Granted publication date: 20200421 License type: Common License Record date: 20201026 |
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