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Completely dynamoelectric the can develop concept and innovation of science and technology continuously research of the machine that note model (3)

Published on:2014/8/8 11:01:55

Keyword:Servo, plastic and mechanical, hydraulic pressure, record model machine
Introduction:Thought of drive of 3 servo motivation can hope of innovation of science and technology and point of research and development are extended completely ...

3ServoDynamical drive thought can hope of innovation of science and technology and point of research and development

Extend completely dynamoelectric notePlasticMechanicalShapeMachining function is the first goal that plans research and development. Servo motivation drive is same position mode with the actuator basis of hydraulic pressure drive, but the change because of dynamical drive type, the comportment that changed actuator learns to follow kinetic function, orgnaization combining a model adds up to modular orgnaization for the ancon lever of same type, but the change because of drive type, the comportment that changed ancon lever to add up to modular orgnaization learns to follow kinetic function, make known his position to there is the inherent characteristic of drive of its servo motivation on its function plan.

Science and technology innovatesResearch and development wants a place: FunctionPlan academic research, the play that finish follows gain with the ability that extends its processing.

3.1Act of servo drive system learns to reach kinetic functionary to plan academic research

3.1.1 The plan with chief condition of servo drive journey studies theoretically

Completely dynamoelectric drive is carried out the journey is the gear drive that has class, difference the stepless drive at hydraulic pressure, journey pace grows is its peculiar skill parameter, also be peculiar plan parameter. Journey pace grows to reach its to locate with journey precision directly again and again precision is relevant. Journey pace grows to follow mining to extending completely dynamoelectric the processing dimensions that fixes plastic machinery has important sense.

Journey condition is chief show driving pulley of servo electric machinery rotates1Tine, executive component leaves mobile tenor in drive of ball silk lever. Journey condition is chief depend on filar lever lead, synchronous belt passes thought compose to fall fast when number of teeth of a cogwheel. Journey condition is chief :

             (1)

Type(1)In:

: Journey condition is chief;

: Lead of ball silk lever;

: Synchronous belt passes thought compose to fall speed ratio;

: Driving gear tine is counted;

: Passivity ages teeth of a cogwheel is counted.

Achievable stepless recuperates system of hydraulic pressure drive, but because of its trends answers functional difference, cannot arrive accurate can charge a sex. Journey pace grows the fitness for use that reachs its precision to be able to accuse a gender to choose its processing dimensions directly.

3.1.2 Trends of servo drive system reacts functionary plans academic research

Trends of driving pulley of servo electric machinery reacts add (decrease) speed. Servo report clever active state reacts speed can inspect linear implication with rotate speed, learn a truth according to act, add (decrease) speed:

                  (2)

Type (2) in:

: Trends of driving pulley of servo electric machinery reacts add (decrease) speed;

: Servo electric machinery ages fast, ;

: Servo report clever active state reacts add (decrease) fast time, ms.

Driving pulley is inside dynamic reaction time, learn a truth according to act, tine of driving pulley move counts:

                       (3)                      

Type (3) in:

: Tine of driving pulley move is counted.

Driving pulley is inside dynamic reaction time, by actuator journey:

                       (4)

Type (4) in:

: By actuator journey, ancon lever orgnaization is thrust namely the journey ; Give or take an injection the orgnaization is screw journey namely.

3.1.3 Ball silk lever deputy allowable the plan of rotate speed studies theoretically

Ball guide screw deputy allowable the than waiting for element difference that rotate speed installs journey of form, axial to follow lead according to its, lever of commonplace ball silk follows lever of special ball silk also difference.

3.1.3.1Commonplace model ball guide screw deputy allowable rotate speed

  (5)

Type (5) in:

: Ball silk lever deputy allowable rotate speed;

: The coefficient of bearing example, give or take an injection the coefficient of the bearing type of ball guide screw is1.9, the coefficient of the type of only group bearing of guide screw of ball combining a model is3.14, the coefficient of the type of double set bearing of guide screw of ball combining a model is4;

: Between bearing of ball guide screw length, Mm;

: Gravity is accelerated degree, 9800mm/ S2;

: The model measures material flexibility, 2.06×107N/cm3;

: Material density, 7.8×10- 2N/cm3;

: Diameter of bottom of ball guide screw, Mm;

: Unruffled coefficient, 0.8.

Rotate speed of commonplace ball guide screw returns those who want linear velocity of the ball bearing inside favorite nut to restrict:

          (6)

Type (6) in:

: Linear velocity of ball bearing give one's word, 300×103Mm/ Min;

: Round diameter of deputy pitch of ball silk lever, Mm.                               

Of screw of deputy drive of ball silk lever allowable speed:

                 (7)

Type (7) in:

: Allowable speed;

: The lead of ball silk lever, Mm.

According to type (5) , (6) dispute effect, take small cost, And according to fall the identity such as speed ratio, Lever of affirmative ball silk the plan parameter of deputy rotate speed:

                                 (8)

According to type (7)Deputy rotate speed of ball silk lever plans parameterTake value effect, affirm the plan parameter of speed :

                              (9)

Clarify above, type (5) , (6) declare, reduce diameter of ball guide screw to arrive at promotion allowable rotate speed; Type (9) declare, in promotion rotate speed at the same time, enlarge lead of ball guide screw, reach hoist speed.

3.1.3.2Of lever of special ball silk allowable rotate speed

Lever of special ball silk basically points to give or take an injection lever of appropriative ball silk, allegoricalNSKThe big negative charge of the company is special ball silk lever, the measure cost of top rotate speed is very high, but basically use high load capacity of Yu Xiaohang Cheng give or take an injection servo motivation drive.

Alleged small journey, show journey of axial of ball silk lever is more than5Lead.

If give or take an injection,the journey is more than5Lead, allowable rotate speed should be pressed3.1.3.1The principle of the section is affirmative.

3.2Servo motivation driveFunction of mastery of a skill or technique of the processing that note modelThe theory of the plan studies

Completely dynamoelectric the main processing tool that fixes plastic machinery is a project plastic reach its the high-end polymer finished product of complex material. The plan float of parameter of mastery of a skill or technique of the main processing that note model reveals what high end notes model project to play change a feature.

3.2.1 Of servo motivation driveGive or take an injection speed parameter feature

Tall give or take an injection speed is completely dynamoelectric note plastic machinery to give or take an injection the main feature of parameter. Completely dynamoelectric the measure that registers plastic machinery gives or take an injection speed plays at high end demand of skill of the project that note model is plan policy, fix plastic machinery with hydraulic pressure drive2Times for fiducial, common measure gives or take an injection speed is150mm/s, in order to emerge the give or take an injection character of its high end. Lock up modular force1000kNThe following, tall give or take an injection speed needs to arrive300mm/s; Lock up modular force to be more than1000kNTo350kN, tall give or take an injection speed needs to arrive240mm/s. Freeboard gives or take an injection speed is more than500mm/Above, and even arrive1200mm/s.

3.2.2 Function of reaction of servo report clever active state follows give or take an injection the associated function research of speed

Of servo drive give or take an injection what speed exaggerates is instantaneous high speed. Give or take an injection speed is give or take an injection equably speed, need to think namely give or take an injection initiative of thing following complete answer time. Below the operating mode that exceeds high speed to give or take an injection, give or take an injection initiative of the thing that reach complete answer time to fight each other the influence have a trial of strength of needle speed is great. Give or take an injection namely speed answers function with the trends of servo electric machinery direct and relevant. Allegorical of a child give or take an injection always time is500ms, give or take an injection speed is1000mm/s, now servo electric machinery is the fastest trends answers time to be15ms, think to give or take an injection again in the system additional the influence of act inertia, the system gives or take an injection initiative answer the issue that reach complete answer time to be about each20ms, give or take an injection actually time is460ms, give or take an injection speed needs to arrive1087mm/s, literary talent arrives1000mm/sspeed requirement; If the theory of the plan gives or take an injection,speed is1000mm/s, in moving actually, give or take an injection speed is920mm/s. If choose answer time commonplacely to be60msservo electric machinery, think to give or take an injection in the system additional the influence of act inertia, the system gives or take an injection initiative answer the issue that reach complete answer time to be about each65ms, theory gives or take an injection speed is1000mm/s, give or take an injection actually speed can arrive only740mm/s; If want to arrive,give or take an injection speed is1000mm/s, theory gives or take an injection speed needs to plan1350mm/s.

3.2.3 Servo motivation driveFreeboard gives or take an injection the plan of speed studies theoretically

By on the section clarifies, Servo electric machinery-Synchronism takes drive deputy-Commonplace modelBall guide screw deputy-The speed noting model of the drive thought compose of the screw that note model is followed the limitation of rotate speed of the ball bearing inside nut by rotate speed of ball guide screw, cannot finish freeboard to give or take an injection speed. Reclaim much groupCommonplace modelDrive of deputy synchronism of ball silk lever gives or take an injection orgnaization form, this reason only groupCommonplace modelThe bear that ball guide screw bears the weight of changes by the guide screw of ball of small negative charge of small diameter of many big lead deputy bear the weight of, such, always bear the weight of competence is stable, because of the diameter reduce, by type(6) , (7) , those who promoted ball guide screw is allowable rotate speed; Because of the amplification of lead, by type (9) , promotionGive or take an injection speed.  

The plan principle of distribution of deputy transmission of guide screw of much group ball. Give or take an injection pressure becomes direct ratio with the torque of drive screw, and drive screw gives or take an injection torque adds force deputily to compare direct ratio with ball silk lever, give or take an injection namely pressure adds force deputily to compare direct ratio with ball silk lever, because this reclaims,drive of deputy synchronism of lever of silk of much group ball gives or take an injection orgnaization, the lever of silk of much group ball of indispensible suit system adds what force compares deputily to follow those who follow drive of lever of silk of ball of former only group to gain strength equaler than all be being stood by probably, can assure so rated give or take an injection pressure did not change, namely lever of silk of ball of former only group deputyadd force comparing to beM, Lever of silk of every ball in secondary system of staff of silk of much group ball adds force deputily to compare forM/n(NFor deputy number of ball silk lever) .

Exemple1: Some1000kNThose who lock up modular force is completely dynamoelectric fix plastic machinery, deputy drive of lever of odd ball silk gives or take an injection orgnaization, give or take an injection screw diameter28mm, give or take an injection pressure213.5MPa, give or take an injection rated force (axial of ball guide screw is the biggest its negative charge)131.45kN, servo electric machinery is rated rotate speed3000r/min, ball guide screw deputy rated rotate speed1125r/min, give or take an injection specified rate300mm/ S. Choose commonplace model lever of silk of heavy load ball deputy63-16B2(watch1) : Pitch garden is65.2mm, lead16mm, bottom diameter55.466mm, lead horn4.46870, Zeng force is compared12.8345, Dead load811kN, dynamic load260kN, axial of give one's word is laden173.96kN. Between bearing of ball guide screw lengthL=200mm.

By type (5) :

By type (6) :

Choose a principle according to afore-mentioned plan machine, deputy rotate speed of ball guide screw is more than1445r/min. By type (7) , allowable give or take an injection speed:

Afore-mentioned dispute declare, of deputy drive of lever of silk of only group ball give or take an injection speed arrives hard500mm/sThe freeboard of above gives or take an injection speed.

Exemple1: Give or take an injection actually speed:

Visible, exemple1In of real plan give or take an injection lever of silk of speed suit ball is allowable the requirement of linear velocity.

The freeboard of drive of deputy synchronism of lever of silk of double set ball that finish gives or take an injection research. With exemple1For exemple, giving or take an injection continuously torque of force, total drive, give or take an injection pressure, synchronous belt falls speed ratio stabilizes an environment to fall, the freeboard that finish gives or take an injection speed. According to the choose principle that afore-mentioned clarifying, reclaim double setBall silk lever deputyDrive plan. Only groupForce of deputy Zeng of ball silk lever is compared for63-16B21/2, static, Dynamic load and bear of axial of give one's word not under63-16B21/2. The principle is chosen to fall in this height, chooseHIWMOf the company50-25B2Ball guide screw deputy (watch1) , ball silk lever deputy: Pitch garden is51.4mm, lead25mm, bottom diameter42.466mm, lead horn8.83890, Zeng force is compared6.51, Dead load639kN, dynamic load210kN, axial of give one's word is laden1080kN.

Reclaim type (5) , lever of dispute ball silk deputy allowable rotate speed:

By type (7) , allowable give or take an injection speed:

Afore-mentioned dispute declare, exemple1Reclaim double setDeputy synchronism of ball silk leverDrive plan, the biggest give or take an injection speed can be amounted to737.5mm/s, the place of deputy drive of lever of silk of only group ball that this is general rule cannot finish.

Only group gives or take an injection lever of special ball silk the deputy freeboard that finish fast give or take an injection. Promotion gives or take an injection speed, in favorite give or take an injection below the dynamical function condition of drive, Exemple1In, if chooseNSKOf the company give or take an injection lever of special ball silkHTF-SRD6340-8E: Pitch garden is65.5mm, lead40mm, bottom diameter49mm, lead horn110, Zeng force is compared5.238, Dead load768kN, dynamic load291kN, axial of give one's word is laden106.7kN, by the watch2allowable rotate speed2400r/min. By type (7) , can arrive highest give or take an injection speed:

But increase because of the lead of ball silk lever, comparative former orgnaization, Zeng force is compared by12.8345Drop for5.238Reduce; Increase because of the rotate speed of ball silk lever at the same time, and the rated rotate speed of servo electric machinery is commonly3000r/min, synchronism takes an orgnaization fall speed ratio by2.66Drop for1.25; The torque that increased servo drive accordingly is made an appointment with2.5Times, namely the torque of servo electric machinery is former orgnaization2.5Times.

The high speed that finish faces to give or take an injection above measure what method of two kinds of drive can look to go out, each have advantages and disadvantages, need to reach sexual price and plan according to real function.

3.2.4 FreeboardBearGive or take an injection the plan of force studies theoretically

Give or take an injectionLayshaft of ball silk lever basically plans to join as what bear the weight of to load.

Now, note guide screw of ball of plastic and mechanical special big negative charge to beNSKOf the companyHTF-20032-7.5, axial diameter200mm, lead32, axial of give one's word is laden809.4kN. Press plan of this ball guide screw, Bear the weight of unruffled coefficient is pressed give or take an injection dynamic load handles rewards and punishments by root mean square, reliable sex coefficient is taken1.25, criterion ball silk lever deputy allowable axial load is809.4÷1.25=647.52 KN, give or take an injection namely force is more than647.52kN. If press,give or take an injection pressure190MPaDispute, the biggest give or take an injection screw diameter is about65mm.

Afore-mentioned clarifying declare, give or take an injection force is more than647.52kN, deputy dynamic load returns guide screw of only group ball short of bears the weight of the requirement of competence, need to reclaim type of drive of deputy synchronism of guide screw of much group ball, namely give or take an injection force is equational give guide screw of each only group ball deputy weight, the system just can arrive bear the weight of competence requirement. Allegorical, 16000kNThe ancon lever of the drive of servo electric machinery of the force that lock up a model adds up to modular orgnaization, give or take an injection screw diameter is120mm, rated give or take an injection pressure is160MPa, give or take an injection the biggest dynamic load arrives at axial1808kN, need to deploy 3 groupsHTF-20032-7.5Drive of deputy synchronism of ball silk lever, just can finish give or take an injection the requirement of dynamic load. Eaves ministry developed use Yu Chao technically large completely dynamoelectric the exceeds heavy load ball guide screw that fixes plastic machinery deputy, MD850S-Ⅲ uses two55×2kWServo electric machinery-Synchronous belt-The transmission system of ball guide screw, drive gives or take an injection screw diameter100mm, bear1480kN.

3.2.5 Servo drive gives or take an injection the plan research with journey chief condition

Give or take an injection journey Shen Mi locates direct responsibility arrives Shen Mi is metric. Shen Mi gives or take an injection give or take an injection the apply the brake of the journey locates precision is0.05mm, miniature Shen Mi notes model to need to arrive0.02mmgive or take an injection fixed position precision.

Servo motivation drive is finished give or take an injection journey Shen Mi locates, dynamic apply the brake of the system reacts function is a function that nots allow to ignore, immediate impact arrives give or take an injection precision of fixed position of journey Shen Mi, and give or take an injection journey pace grows is to give or take an injection the skill parameter of the symbolic sex of precision of journey trends apply the brake.

The requirement according to precision of fixed position of the journey that note model and servo report are agile responses of voice apply the brake is characteristic, and servo is abstemious the system detects the feature of gear movement information, solidarity gives or take an injection the parameter characteristic with journey chief condition, should arrive at what Shen Mi gives or take an injection to give or take an injection the precision of fixed position of apply the brake of the journey,

Exemple1In, give or take an injection rotate speed of servo electric machinery is3000r/min, time of reaction of systematic trends apply the brake20ms. Guide screw lead16mm, Section garden diameter65.2mm, Synchronous belt falls speed ratio96/36, Z1=36, Z2=96. Move of driving pulley of servo electric machinery1Tine, by type (1) , give or take an injection screw journey condition is chief:

Giving or take an injection servo electric machinery is rated rotate speed3000r/minBelow, driving pulley ages fast for:

Time of reaction of systematic trends apply the brake20ms, active cycle ages number falls speed, secondhandRecord model machineNet, by type (2) :

Inside time of reaction of systematic trends apply the brake, learn a truth according to act, tine of driving pulley movement is counted, by type (3) :

System of servo motivation drive is in what dynamic apply the brake reacts time arises to give or take an injection the journey namely journey of apply the brake , By type (4) :

      

Clarify above declare, give or take an injection the rotate speed that the journey locates precision follows servo electric machinery and correlation of diameter of time of reaction of dynamic apply the brake, it is a dynamic parameter. Declare at the same time, exemple1Below rated rotate speed, Note model forum, cannot arrive0.05mmjourney of apply the brake. Exemple1In, want to arrive0.05mmjourney of apply the brake, can useAhead of schedule low give or take an injection apply the brake is nodded (complete thing) rotate speed of servo electric machinery ages namely fast, journey of the apply the brake that finishArrive at Shen Mi's precision to ask. Arrive0.05mmjourney of apply the brake, driving pulley reacts in dynamic apply the brake while movement ages number is:

The linear implication that follows dynamic reaction time according to rotate speed of servo electric machinery, driving pulley apply the brake nods rotate speed:

   

Time of apply the brake:

Graph6For exemple1servo motivation drive gives or take an injection graph of dynamic apply the brake. CThe dot is dot of apply the brake, driving pulley speed is133r/min, DDot to give or take an injection actually complete thing is nodded.

Graph6Servo motivation drive gives or take an injection curve of dynamic apply the brake


Keyword:Servo, plastic and mechanical, hydraulic pressure, record model machine

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