CN205668405U - A kind of drive system of punching machine - Google Patents
A kind of drive system of punching machine Download PDFInfo
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- CN205668405U CN205668405U CN201620550312.4U CN201620550312U CN205668405U CN 205668405 U CN205668405 U CN 205668405U CN 201620550312 U CN201620550312 U CN 201620550312U CN 205668405 U CN205668405 U CN 205668405U
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- net side
- side form
- form block
- motor
- energy storage
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Abstract
The utility model discloses the drive system of a kind of punching machine; electrically externally fed equipment power supply unit is followed by three-phase input reactance device through over-pressure safety device; the outfan of three-phase input reactance device is connected with the input of active net side form block; the AC conversion of input is the unidirectional current needed for system by active net side form block; flow to energy storage device; the outfan of energy storage device is connected with the input of motor driver and provides energy for it, and motor driver realizes the precise closed-loop to direct driving motor according to the pulse signal that host computer provides and controls.This utility model uses active net side form block as the net side interface of drive system, it is possible to limit the driving equipment power from front end electrical network complementary energy, it is to avoid the net side peak current that motor overload brings, and reduces and drives front equipment end net side capacity.Can reliably ensure the minimum amplitude of bus, it is ensured that motor is operated in required operating point, and then ensures stablizing of press apparatus performance.
Description
Technical field
This utility model relates to the drive system of a kind of punching machine.
Background technology
Metal sheet forming equipment is widely used in automobile, Aero-Space, electronics, communication and household appliance technical field plate shell zero
The production of part, kind and quantity are various, wherein the most universal with punching machine application.Traditional punching machine has cost
Low, high reliability, but modern manufacturing industry proposes the highest requirement to variation, the personalization of product, different
Product and technique have bigger difference to the rate request of slide block.Traditional mechanical forcing press mostly using normal asynchronous as
Power source, forms drive system with fixed drive ratio mechanism, using the single-degree-of-freedom such as cam, connecting rod variable ratio mechanism as execution
Mechanism, the input link of actuator is generally as constant velocity rotation.Therefore, ram speed is rigidity output, it is impossible to control speed
Curve, lacks flexibility, it is difficult to meet the demand that flexibility manufactures.
In recent years, a new direction of Forming Equipments development is become with AC servo machinery driving.In this context, with
AC servo motor replaces common asynchronous moter, and the position given by forcing press upper computer control system and speed command control
Driven by servomotor eccentric rotary mechanism, then by screw rod, crank connecting link, toggle link or other mechanism, the rotary motion of motor is turned
The servo-pressing machine turning to slide block linear motion achieves tremendous development.It not only can keep mechanically operated advantage, and
Change the nonadjustable shortcoming of its operating characteristic, make mechanically operated former possess flexibility, intelligentized feature, work
Make performance and Technological adaptability is greatly improved.
Servo-pressing machine slide block is speed to be changed in running, needs energy storage device moment output foot during acceleration
Enough big energy, use electromagnetic braking, convert kinetic energy into electric energy and reclaimed electric energy by energy storage device during deceleration.Especially
When forcing press punching press, motor runs according to maximum overload capacity, is mainly provided instantaneous overload energy by energy storage device for rear class.
The device being currently mainly applied to high-power servo or converter energy storage includes capacitance energy storage, battery energy storage and flywheel energy storage.Electricity
It is high that pond energy storage has energy storage density, the advantages such as volume is little, but owing to its charge/discharge rates is slow, charging times is limited, little conduct
Intermediate link is applied to motor driver or converter energy storage.It is fast that capacitance energy storage has charge/discharge rates, and transformation efficiency is high, controls
Simply, but owing to its energy storage density is low, same energy storage, use electric capacity, need higher cost and space.Though flywheel energy storage
So less than capacitance energy storage on holistic cost, but its charge/discharge rates and transformation efficiency are below capacitance energy storage scheme, and need
Complicated control algolithm and control system.
As the core control system of forcing press, AC servo drive system also has and constantly develops, and applies ratio at present
Rectifying part many employings diode of more AC servo carries out uncontrollable rectifier, and its shortcoming mainly includes four aspects:
(1) forcing press stamped workpieces moment, motor is instantaneous to be run with maximum overload capacity, will certainly cause driving front equipment end net side electricity
Stream impact, may cause tripping operation, fuse blows etc. accident, in some instances it may even be possible to impact plant area's electrical network, cause other to set
For not running well.The problems referred to above to be avoided, can only significantly expand driving front equipment end net side capacity, the most not only carry
Carry out steeply rising of cost, and the examination & approval of distribution capacity not necessarily can be passed through.(2), during motor overload, busbar voltage is continuous
Declining, after busbar voltage drops to certain value, motor will can not be operated in required operating point, and press apparatus performance is significantly
Degree reduces.(3) system power factor is low, causes net side capacity to increase, and side harmonics content is high simultaneously, and electrical network causes bigger dirt
Dye, affects miscellaneous equipment and runs well.(4) uncontrollable due to busbar voltage, externally fed unit determine, and with motor
Voltage magnitude needed for low operating point relatively, so for more large-tonnage forcing press drive system, in order to ensure motor
It is operated in required operating point, needs to increase considerably electric capacity quantity, thus add the cost of system significantly.
Chinese utility model patent " the controlling party of a kind of main drive system of AC servo being applied to mechanical crank forcing press
Method " (Authorization Notice No.: CN102001189B), it is by rectification unit, energy-storage units, inversion unit, brake unit, control unit
Form with communication unit etc., it is possible to overcoming the control accuracy problem that general-purpose servo exists, this utility model is directed to pressure simultaneously
The energy of machine moment is mainly derived from electric capacity, is detected by busbar voltage and the application of Voltage Compensation Control Method, can offset bus
The voltage pulsation disturbance to controlling, improves and controls effect.But there is also following shortcoming: this driver uses diode not control whole
Stream, busbar voltage is by voltage on line side influence of fluctuations, and normal value is about 537VDC, although increases capacitance and carries out dilatation, but
Forcing press stamped workpieces moment, motor is instantaneous to be run with maximum overload capacity, will certainly cause driving front equipment end current on line side
Impact, may cause tripping operation, fuse blows etc. accident, in some instances it may even be possible to impact plant area's electrical network, cause miscellaneous equipment
Can not run well, if increasing distribution capacity to there is also the risk that examination & approval not necessarily can be passed through.
Utility model content
Technical problem to be solved in the utility model, is the defect overcoming prior art to exist, and proposes a kind of machinery
The drive system of forcing press.Use active net side form block as the net side interface of drive system, it is possible to limit driving equipment in the past
The power of end electrical network complementary energy, it is to avoid the net side peak current that motor overload brings, reduces and drives front equipment end net side capacity.Can
Reliably ensure the minimum amplitude of bus, it is ensured that motor is operated in required operating point, and then ensures press apparatus
Stablizing of performance.Improve the power factor of driving equipment, reduce side harmonics content, reduce the pollution to electrical network of the driving equipment.
By giving full play to the effect of active net side form block, promote the normal working voltage of system, reduce the electric capacity of energy storage section
Quantity and whole system cost.
Its concrete scheme is as follows:
The drive system of this utility model punching machine, including over-pressure safety device, three-phase input reactance device, active net
Side form block, energy storage device, motor driver, direct driving motor, power module and forcing press upper computer control system.Electrical equipment
Externally fed unit is forcing press upper computer control system, active net side form block and the control of motor driven systems through power module
The power supply of system part, upper computer control system sends up and down to active net side form block and motor driver by the form of bus
The signal of telecommunication and drive pulse signal.Electrical equipment externally fed unit sequentially passes through over-pressure safety device, three-phase input reactance
Device, active net side form block, energy storage device, motor driver provide kinetic energy for direct driving motor.Electrically externally fed equipment is powered
Unit is followed by three-phase input reactance device, the outfan of three-phase input reactance device and active net side form block through over-pressure safety device
Input is connected, and the AC conversion of input is the unidirectional current needed for system by active net side form block, flows to energy storage device, storage
Can be connected with the input of motor driver and provide energy for it by the outfan of device, motor driver is according to host computer
The pulse signal provided realizes the precise closed-loop to direct driving motor and controls.
This utility model system, when normally working, electrical equipment externally fed unit is through over-pressure safety device and three
Phase input reactance device, is increased to normal working voltage by active net side form block by DC bus-bar voltage.When forcing press punching press wink
Between, motor instantaneous overload, mainly provided energy, busbar voltage to drop near minimum running voltage by storage capacitor；At pressure
Machine slide block idle stroke is interval, and busbar voltage from the slow complementary energy in net side, is brought up to normal working voltage by active net side form block again, for
Punching press is ready next time, and so move in circles work.Normal working voltage is that user is arranged in active net side inside modules
Parameter, this magnitude of voltage be higher than minimum running voltage, less than the pressure safety zone of hardware device, and minimum running voltage is
The minimum voltage that active net side form block can normally work.
This utility model system, uses active net side form block as the net side interface of drive system, it is possible to limits driving and sets
Standby from the power of front end electrical network complementary energy, it is to avoid the net side peak current that motor overload brings, reduce and drive front equipment end net side to hold
Amount.Can reliably ensure the minimum amplitude of bus, it is ensured that motor is operated in required operating point, and then ensures pressure
Stablizing of machine equipment performance.Improve the power factor of driving equipment, reduce side harmonics content, reduce driving equipment to electrical network
Pollute.By giving full play to the effect of active net side form block, promote the normal working voltage of system, reduce the electricity of energy storage section
The quantity held and whole system cost.
Accompanying drawing explanation
Fig. 1 is the driving system circuit block diagram of this utility model punching machine.
Fig. 2 is the drive system over-pressure safety device circuit figure of this utility model punching machine.
Detailed description of the invention
Below in conjunction with the accompanying drawings, this utility model is described in further details.
As it is shown in figure 1, the drive system of this utility model punching machine, including over-pressure safety device, three-phase input electricity
Anti-device, active net side form block, energy storage device, motor driver, direct driving motor, power module and forcing press PC control system
System.Electrical equipment externally fed unit is forcing press upper computer control system, active net side form block and motor through power module
The power supply controlling part of drive system, upper computer control system drives to active net side form block and motor by the form of bus
Device sends power-on and power-off signal and drive pulse signal.Electrical equipment externally fed unit sequentially pass through over-pressure safety device,
Three-phase input reactance device, active net side form block, energy storage device, motor driver provide kinetic energy for direct driving motor.Outside
Power supply unit power supply unit is connected with the input of overvoltage protection, is followed by three-phase input reactance device through over-pressure safety device,
The outfan of three-phase input reactance device is connected with the input of active net side form block, and the alternating current of input is turned by active net side form block
Turn to the unidirectional current needed for system, flow to energy storage device, the input phase of the outfan of energy storage device and motor driver
Even and for it providing energy, the pulse signal that motor driver provides according to host computer realizes the precise closed-loop to direct driving motor
Control.
Described over-pressure safety device is to be made up of varistor, gas-discharge tube and filter capacitor, as in figure 2 it is shown, wherein
Filter capacitor C1, C2, C3 be connected across respectively externally fed unit the most biphase between, one end of varistor X1, X2 and X3
Being connected with any one phase of externally fed unit, other end is connected with one end of gas-discharge tube D1, gas-discharge tube D1's
Other end the earth FG is connected.For filtering and absorb the spike interference of electrical network, protection rear class equipment normally works.
Described input reactance device and active net side form block together constitute a controlled high efficiency rectification system of output voltage,
The three-phase alternating current that externally fed power supply provides is converted into the adjustable unidirectional current of voltage, and driving equipment can be limited from front end
The power of electrical network complementary energy, it is to avoid the net side peak current that motor overload brings, reduces and drives front equipment end net side capacity, it is possible to can
The minimum amplitude of bus is ensured, it is ensured that motor is operated in required operating point, and then ensures press apparatus by ground
Stablizing of energy；The power factor of driving equipment can be improved, reduce side harmonics content, reduce the dirt to electrical network of the driving equipment
Dye.Add three-phase input reactance device in active net side form block front end, both when rectifier boost as energy-storage travelling wave tube, can have again
The properly functioning of rear class system is impacted by the interference of effect ground suppression mains by harmonics.Use active net side form block, promote normal
Running voltage, thus it is substantially reduced volume and the cost of storage capacitor, and then reduce volume and the cost of whole system.
Described energy storage device is as the energy-storage system of energy-storage travelling wave tube by electric capacity, is used for providing energy to rear class drive system
Amount.Having fast response time, transformation efficiency is high, controls the advantages such as simple.
Motor driven systems, as the control unit of direct driving motor, can realize directly driving electricity according to the instruction that the external world provides
Seat in the plane is put, the precise closed-loop of rotating speed and electric current controls.
Direct driving motor is as the power take-off mechanism of whole system, and it possesses the characteristics such as the slow-speed of revolution, high pulling torque, high accuracy.
Power module is to be made up of Switching Power Supply and UPS, on the one hand uses Switching Power Supply to be converted into the high voltage in system in safety
Low-voltage in operating voltage range, as upper computer control system, active net side form block and the control portion of motor driven systems
The power supply unit divided, significantly reduces the electric shock risk of site operation personnel.
Use ups system can to supply as controlling part to whole system in back-up source, short time when grid cut-off
Electricity, it is ensured that during the unexpected dead electricity of whole system, the huge energy to energy-storage system is normally released.
The instruction that forcing press PC control device inputs according to user and the current running status form by bus
Power-on and power-off signal and drive pulse signal is sent, to guarantee the ginseng that whole system sets according to user to driver and commutator
Number runs, and completes corresponding task.
The drive system of this utility model punching machine, when normally working, electrical equipment externally fed unit passes through
Over-pressure safety device and three-phase input reactance device, be increased to normally work by DC bus-bar voltage electricity by active net side form block
Pressure.When forcing press punching press moment, motor instantaneous overload, mainly energy, busbar voltage is provided to drop into minimum work by storage capacitor
Make near voltage；Interval in press ram idle stroke, busbar voltage from the slow complementary energy in net side, is improved by active net side form block again
To normal working voltage, ready for punching press next time, so move in circles work.Normal working voltage is that user is active
The parameter that net side inside modules is arranged, this magnitude of voltage is higher than minimum running voltage, less than the pressure safety zone of hardware device,
And minimum running voltage is the minimum voltage that active net side form block can normally work.
The drive system of a kind of punching machine that the utility model proposes.Use active net side form block as whole driving
The net side interface of system: (1) can limit the driving equipment power from front end electrical network complementary energy, it is to avoid the net side that motor overload brings
Peak current, reduces and drives front equipment end net side capacity, largely reduce client prime input tranformer and electrical network
The requirement of capacity.(2) the minimum amplitude of bus can reliably be ensured, it is ensured that motor is operated in required work
Point, and then ensure stablizing of press apparatus performance；When forcing press drive system normally works, by active net side form block by mother
Line voltage is increased to normal working voltage；When forcing press punching press moment, motor instantaneous overload, motor driven systems is mainly by energy storage
Electric capacity provides energy, and busbar voltage, along with the consumption of energy, can drop near minimum running voltage；In press ram null
Journey is interval, and busbar voltage from the slow complementary energy in net side, is brought up to normal working voltage, for punching press next time by active net side form block again
Ready, so move in circles work.Normal working voltage is the parameter that user is arranged in active net side inside modules, this electricity
Pressure value is higher than minimum running voltage, and less than the pressure safety zone of hardware device, and minimum running voltage is active net side form
The minimum voltage that block can normally work.(3) improve the power factor of driving equipment, reduce side harmonics content, reduce and drive
The equipment pollution to electrical network, it is ensured that run with the normal reliable of other electronic equipments of electrical network.(4) by giving full play to active net
The effect of side form block, promotes the normal working voltage of system, reduces the electric capacity cost of energy storage section.For a high-power pressure
Power machine drive system, the cost of energy storage device and volume account for the 50% of whole system.According to capacitance energy storage formula, capacitance energy storage
The ceiling capacity that unit provides is:, by promoting normal working voltage very great Cheng
The reduction capacitor's capacity of degree and quantity, although the electric pressure of rear class inversion and motor improves, and cost slightly rises, but this part
For cost increase reduces compared to the cost of energy storage link, insignificant.Certain practical engineering application case is as follows: a set of
200Ton servo-pressing machine system, normal working voltage is 700VDC, and minimum running voltage is 600VDC, the instantaneous need of energy storage link
Gross energy to be provided is 50kJ, and storage capacitor needs the electric capacity of 308 450V 10000uF.If normal working voltage is
1000V, bus capacitor needs only to the electric capacity of 141 450V 10000uF, and storage capacitor number reduces 55%, and drive and
The cost increase that motor brings owing to electric pressure improves is only 6%, it is seen that the program is with the obvious advantage.Of the present utility model drive
Dynamic system is capable of the closed loop control of busbar voltage, in idle stroke, busbar voltage is increased to normal working voltage, motor mistake
During load, storage capacitor releases energy, and busbar voltage drops to minimum running voltage, remain able to ensure motor be operated in (Tem,
W) any point on curve, thus ensure that technique and the quality of Workpiece shaping.
Claims (1)
1. a drive system for punching machine, including over-pressure safety device, three-phase input reactance device, active net side form block,
Energy storage device, motor driver, direct driving motor, power module and forcing press upper computer control system；It is characterized in that: electrically set
Standby externally fed unit is forcing press upper computer control system, active net side form block and motor driven systems through power module
Controlling the power supply of part, upper computer control system sends to active net side form block and motor driver by the form of bus
The lower signal of telecommunication and drive pulse signal；Electrically externally fed equipment power supply unit is followed by three-phase input electricity through over-pressure safety device
Anti-device, the outfan of three-phase input reactance device is connected with the input of active net side form block, and active net side form block is by the friendship of input
Stream electricity is converted into the unidirectional current needed for system, flows to energy storage device, and the outfan of energy storage device is defeated with motor driver
Entering end be connected and provide energy for it, the pulse signal that motor driver provides according to host computer realizes the essence to direct driving motor
Closed loop controls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620550312.4U CN205668405U (en) | 2016-06-08 | 2016-06-08 | A kind of drive system of punching machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620550312.4U CN205668405U (en) | 2016-06-08 | 2016-06-08 | A kind of drive system of punching machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205668405U true CN205668405U (en) | 2016-11-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620550312.4U Withdrawn - After Issue CN205668405U (en) | 2016-06-08 | 2016-06-08 | A kind of drive system of punching machine |
Country Status (1)
| Country | Link |
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| CN (1) | CN205668405U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105856605A (en) * | 2016-06-08 | 2016-08-17 | 南京埃斯顿自动化股份有限公司 | Driving system of mechanical press |
-
2016
- 2016-06-08 CN CN201620550312.4U patent/CN205668405U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105856605A (en) * | 2016-06-08 | 2016-08-17 | 南京埃斯顿自动化股份有限公司 | Driving system of mechanical press |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161102 Effective date of abandoning: 20170623 |
|
| AV01 | Patent right actively abandoned |