CN108908978A - A kind of mechanical advantage pole of servo-pressing machine determines method - Google Patents
A kind of mechanical advantage pole of servo-pressing machine determines method Download PDFInfo
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- CN108908978A CN108908978A CN201810544859.7A CN201810544859A CN108908978A CN 108908978 A CN108908978 A CN 108908978A CN 201810544859 A CN201810544859 A CN 201810544859A CN 108908978 A CN108908978 A CN 108908978A
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- 238000003825 pressing Methods 0.000 title claims abstract description 37
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- 238000010168 coupling process Methods 0.000 claims abstract description 25
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- 235000013350 formula milk Nutrition 0.000 claims description 23
- 210000001513 Elbow Anatomy 0.000 claims description 15
- FAPWRFPIFSIZLT-UHFFFAOYSA-M sodium chloride Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 12
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- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 abstract description 8
- 238000005457 optimization Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
- B30B1/26—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by cams, eccentrics, or cranks
- B30B1/268—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by cams, eccentrics, or cranks using a toggle connection between driveshaft and press ram
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
- B30B1/26—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by cams, eccentrics, or cranks
- B30B1/263—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by cams, eccentrics, or cranks work stroke adjustment means
Abstract
The invention discloses a kind of mechanical advantage poles of servo-pressing machine to determine method, this method is due to the continuous function that the mechanical advantage of the mechanism is crank angle, all there is biggish mechanical advantage near mechanical advantage maximum position, the crank angle angle α is collinearly obtained according to ABK, the mechanical advantage pole of the as described servo-pressing machine, nominal working stroke, which is arranged in these positions, can effectively reduce the torque of driving motor；It is simple, quick compared to being designed using the various optimization methods of computer based；And by analysis of the application to mechanical advantage extreme point, it can be used for design, the design of triangular coupling rod size, the design of choice of electrical machine to the location of workpiece.
Description
Technical field
The present invention determines method about a kind of servo-pressing machine, the mechanical advantage pole of especially a kind of servo-pressing machine.
Background technique
Servo-pressing machine (Servo Press), as power source, passes through transmission mechanism and executing agency using servo motor
Convert the rotary motion of motor to the linear motion of sliding block.Due to not having flywheel, operating pressure suffered by servo-pressing machine is by electricity
The instantaneous torque of machine balances, and the capacity of motor is more much bigger than ordinary press.How transmission mechanism and execution sufficiently excavated
The structure potentiality of mechanism, maximize mechanical advantage in nominal working stroke, are the driving torques for reducing motor, to reduce
Equipment cost and the effective way for improving operation stability.Such as servo-pressing machine (CN101480692B), two symmetrical fortune
Connecting rod in dynamic branch is all made of parallelogram sturcutre, therefore can guarantee during the motion, the connecting rod rack of two sides, cunning
Block remains horizontal attitude, and the overturning freedom degree of slide block movement is eliminated by mechanism, carries out when to complicated asymmetric part
When processing, since the kinetic characteristic of itself constrains, the sliding block by non-symmetrical load will not cause side to fuselage during exercise
To load, to improve the offset load resistance of mechanism.Such as multi-connecting rod servo press machine (CN107972301A), in multi link
In drive system, typically uni-directional punching press pushes inertia and is conducive to pressurize, but the inertia switching between resetting and being reciprocal, can pole
The stability of big influence equipment, the precision of forging and stamping and the stability of driving structure；Above two press machine equally faces in this way
The technical issues of, the structure potentiality of transmission mechanism and executing agency how are sufficiently excavated, mechanical benefit is made in nominal working stroke
It is the driving torque for reducing motor that benefit, which maximizes, to reduce equipment cost and improve the effective way of operation stability.
Crank-triangular coupling rod-elbow-bar mechanism is current using very wide servo-pressing machine executing agency.The machinery of the mechanism
Interests are influenced by many factors, such as length, rack installation dimension, the triangular coupling rod shape, nominal working stroke pair of each component
The factors such as the crank angle answered can all influence the movement and dynamic characteristics of entire mechanism.It is at present to adopt due to the complex nature of the problem more
It is designed with the various optimization methods of computer based, that there are mathematical models is not intuitive, calculating process is unstable, is difficult to ask
The problems such as to globally optimal solution.
Summary of the invention
A kind of mechanical advantage pole determination side of servo-pressing machine is provided it is an object of the invention to consider the above problem
Method.
To achieve the above object, the technical solution adopted by the present invention is that：A kind of mechanical advantage pole of servo-pressing machine is true
Determine method, the structure of the servo-pressing machine is crank-triangular coupling rod-elbow-bar mechanism, and the structure of the servo-pressing machine includes
Crank AB, triangular coupling rod BCD, upper elbow lever CE, lower elbow lever DF；The crank AB is driving link, the A point revolution in rack, institute
It states E point of the upper elbow lever CE in rack to swing back and forth, the triangular coupling rod BCD and lower elbow lever DF do plane motion, the lower elbow
Bar DF drives sliding block to export ramming motion along guide rail upward-downward translation；Include the following steps：
Step 1: establish using A point as the plane right-angle coordinate XAY of origin, X-axis positive direction be horizontally to the right, it is vertical with EF, α be to
AmountWith the positive angle counterclockwise of X-axis, obtain：A=(0,0)；
Meaning representated by F=(- L ,-H) each symbol is as follows：F：Mechanical advantage, P：Useful production resistance is (for servo-pressing machine
For, according to the object of driving, which is constant), Q：Driving force, it is known that crank-each bar of triangular coupling rod-elbow-bar mechanism ruler
Very little AB=r, BC=L3, CD=L2, BD=L4, CE=L1, DF=L5, L：Horizontal distance between sliding block and A point, H：Sliding block with
Vertical distance between A point；
Step 2: vector convert clockwise be it is known, such as formula (1), turn the angle θ obtains vector to vector a (p, q) clockwise
B (x, y), it is known that vector rotates clockwise transformation for mula：
And then using vector transformation formula (1) according to vectorIt is converted toSuch as formula (2)：
Note：β is the ∠ BEC in Δ BEC,
And then using vector transformation formula (1) according to vectorIt is converted toSuch as formula (3)：
Note：γ is the ∠ BCD in Δ BCD,
Step 3: verification vectorsWith vectorIntersection point K, when ABK is conllinear, sliding block is located near top dead center, and is machine
Tool interests maximum point position, only works as vectorWith vectorWhen not parallel can invocation point K, and using K point to straight line AB away from
From being 0, i.e., when ABK is conllinear, α is solved；The angle α, the mechanical advantage pole of the as described servo-pressing machine are collinearly obtained according to ABK.
Preferably, the step 3 collinearly obtains the angle α, the mechanical advantage pole of the as described servo-pressing machine according to ABK
Point；The position between workpiece and sliding block is arranged according to the mechanical advantage pole in step 3.
Preferably, the step 3 collinearly obtains the angle α, the mechanical advantage pole of the as described servo-pressing machine according to ABK
Point；Optimize triangular coupling rod structure according to the mechanical advantage pole in step 3.
Preferably, the step 3 collinearly obtains the angle α, the mechanical advantage pole of the as described servo-pressing machine according to ABK
Point；Type selecting is carried out according to motor of the mechanical advantage pole in step 3 to driving crank AB.
Preferably, a kind of servo pressure, the mechanical advantage pole including a kind of servo-pressing machine determine method for work
The design of part position, the design of triangular coupling rod size, the design of choice of electrical machine.
The mechanical advantage pole that the present invention discloses a kind of servo-pressing machine determines method, machinery of this method due to the mechanism
Interests are the continuous functions of crank angle, all have biggish mechanical advantage near mechanical advantage maximum position, nominal
Pressure stroke, which is arranged in these positions, can effectively reduce the torque of driving motor, sufficiently excavate transmission mechanism and executing agency
Structure potentiality, maximize mechanical advantage in nominal working stroke, the driving torque of motor are not only reduced, to reduce equipment
Cost and raising operation stability；The application, only need to analyze ABK collinearly can find out the extreme point of mechanical advantage, compared to use
The various optimization methods of computer based are simple, quick to be designed；And mechanical advantage extreme point is divided by the application
Analysis, can be used for design, the design of triangular coupling rod size, the design of choice of electrical machine to the location of workpiece.
Detailed description of the invention
Fig. 1 is crank-triangular coupling rod-knuckle-lever press structural scheme of mechanism；
Fig. 2 is the relevant maximum position schematic diagram of crank-triangular coupling rod-knuckle-lever press mechanism；
Fig. 3 solves driving force Q schematic diagram；
The schematic diagram of Fig. 4 corner a and slider displacement；
Fig. 5 is the schematic diagram of corner a and mechanical advantage.
Specific embodiment
To better illustrate the object, technical solutions and advantages of the present invention, below in conjunction with specific embodiment to the present invention
It is described further.
A kind of mechanical advantage pole of servo-pressing machine determines method, as shown in Figure 1, the structure of the servo-pressing machine is
Crank-triangular coupling rod-elbow-bar mechanism, the structure of the servo-pressing machine include crank AB, triangular coupling rod BCD, upper elbow lever CE, under
Toggle link DF；The crank AB is driving link, and the A point revolution in rack, E point of the upper elbow lever CE in rack carrys out backswing
Dynamic, the triangular coupling rod BCD and lower elbow lever DF do plane motion, and the lower elbow lever DF driving sliding block is exported along guide rail upward-downward translation
Ramming motion.
As shown in Fig. 2, Fig. 2 is crank-triangular coupling rod-relevant maximum position of knuckle-lever press mechanism, rub ignoring
In the case where wiping, upper lower elbow lever is all two power bars, and the direction line of triangular coupling rod C and D stress meets at K point.According to rational mechanics original
Reason, triangular coupling rod pass through BK in the Impact direction line of B point, and wherein F/F ' is the dead-centre position up and down of sliding block；According to rational mechanics
Principle, under the premise of ignoring friction and component is elastic, the mechanical advantage maximum of crank link mechanism and elbow-bar mechanism is resonable
By above reaching infinite.It is attached in mechanical advantage maximum position since the mechanical advantage of the mechanism is the continuous function of crank angle
Closely all there is biggish mechanical advantage, nominal working stroke, which is arranged in these positions, can effectively reduce the torsion of driving motor
Square.
Embodiment 1, the relationship at conventional analytic method the analysis angle a and slider displacement：
Meaning representated by each symbol is as follows：F：Mechanical advantage, P：Useful production resistance (carrys out servo-pressing machine
Say, according to the object of driving, which is constant), Q：Driving force, it is known that crank-each bar of triangular coupling rod-elbow-bar mechanism size
AB=r, BC=L3, CD=L2, BD=L4, CE=L1, DF=L5, L：Horizontal distance between sliding block and A point, H：Sliding block and A
Vertical distance between point.
Establish using A point as the plane right-angle coordinate XAY of origin, X-axis positive direction be horizontally to the right, it is vertical with EF, α be to
AmountWith the positive angle counterclockwise of X-axis, obtain：A (0,0),
As shown in figure 3, generally defining mechanical advantage according to the input/output relation of servo-pressing machine：F=P/Qr, P are
It is known.
It is as follows for the value difference of parameters for the present embodiment：
R=100, xe=-500, ye=500, L1=600, L2=550, L3=550, L4=550, L5=600, L=
500。
In this field, vector convert clockwise be it is known, such as formula (1), vector a (p, q) turns the angle θ clockwise and obtains
To vector b (x, y), it is known that vector rotates clockwise transformation for mula：
And then using vector transformation formula (1) according to vectorIt is converted toSuch as formula (2)：
Note：β is the ∠ BEC in Δ BEC,
And then using vector transformation formula (1) according to vectorIt is converted toSuch as formula (3)：
Note：γ is the ∠ BCD in Δ BCD,
It show that D point coordinate is (xd, yd), H, changing rule such as Fig. 4 is found out by formula (4).
As can be drawn from Figure 4, it is lower dead center that α takes 2.1,4.4 respectively, and 3.1,6.2 when is top dead centre；
Embodiment 2 analyzes the position where mechanical advantage maximum point according to the technical solution of the present invention；
1) verification vectorsWith vectorIntersection point K, when ABK is conllinear, sliding block is located near top dead center, and is mechanical advantage
Maximum point position.
Since K point isWithIntersection point obtains K (xk, yk) by formula (5)
Note：Only work as vectorWith vectorWhen not parallel can invocation point K, and using K point to straight line AB distance be 0, i.e. ABK be total to
When line, α is solved equal to 3.1 and 6.1；
2) work pieces process resistance analysis, Y direction resistance P=1000 (unit N) study sliding block as shown in Figure 3a, and N is
Guide rail normal pressure obtains combination resistance R by formula (6)FD：
As shown in Figure 3b, triangular coupling rod force analysis is studied, the parallel DF of ab is, taking ab line segment length is resistance RFD, ab with
BK intersection point is a, and B excessively does CE parallel lines and friendship ab, and in b, (line segment Bb length is CE bar stress REC), it crosses a and makees the vertical crank of straight line
AB extended line obtains intersection point d, and driving force Q is equal to line segment ad length.Such as formula (7), formula (8) are calculated, obtains the change of mechanical advantage F
Change curve, as shown in Figure 5.When α is respectively 3.1,6.2, ABK is conllinear, is located near top dead center, and is mechanical advantage maximum point
Position.
The analysis of mechanical advantage maximum can be seen that by conventional resolution method and technical solution of the present invention；Work as use
When this traditional calculating machine interests of analytic method, calculating α and taking 2.1,4.4 respectively is lower dead center, when 3.1,6.2 for it is upper only
Point, as shown in Figure 4；When using technical solution of the present invention calculating machine interests, when α is respectively 3.1,6.2, ABK is conllinear, position
It near top dead center, and is mechanical advantage maximum point position；It follows that in face of various using computer based
Optimization method is designed, and that there are mathematical models is not intuitive, calculating process is unstable, be difficult to the problems such as seeking globally optimal solution
When, the application, only need to analyze ABK collinearly can find out the extreme point of mechanical advantage, near mechanical advantage maximum position all
With biggish mechanical advantage, nominal working stroke, which is arranged in these positions, can effectively reduce the torque of driving motor, fill
The structure potentiality for dividing excavation transmission mechanism and executing agency, maximize mechanical advantage in nominal working stroke, not only reduce
The driving torque of motor, to reduce equipment cost and improve operation stability, and the calculation method of the application is simple, intuitive.
This scheme of the extreme point of mechanical advantage can be collinearly found out by analyzing ABK using the application, passes through design three
The shape of angle connecting rod is not changing rack installation site, under the premise of not changing two pole length of AB and DF, under slider stroke only
Point realizes 4 points of ECDF conllinear, acquisition mechanical advantage maximum；It can be with known crank-each bar of triangular coupling rod-elbow-bar mechanism
Size obtains the nominal working stroke position of maximum machine interests and determines the peak torque of motor.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than the present invention is protected
The limitation of range is protected, although explaining in detail referring to preferred embodiment to the present invention, those of ordinary skill in the art should
Understand, it can be with modification or equivalent replacement of the technical solution of the present invention are made, without departing from the essence of technical solution of the present invention
And range.
Claims (5)
1. a kind of mechanical advantage pole of servo-pressing machine determines that method, the structure of the servo-pressing machine are that crank-triangle connects
Bar-elbow-bar mechanism, the structure of the servo-pressing machine include crank AB, triangular coupling rod BCD, upper elbow lever CE, lower elbow lever DF；It is described
Crank AB is driving link, and the A point revolution in rack, E point of the upper elbow lever CE in rack swings back and forth, and the triangle connects
Bar BCD and lower elbow lever DF does plane motion, and the lower elbow lever DF driving sliding block exports ramming motion along guide rail upward-downward translation；Including
Following steps：
Step 1: establishing using A point as the plane right-angle coordinate XAY of origin, X-axis positive direction is, α vertical with EF horizontally to the right
For vectorWith the positive angle counterclockwise of X-axis, obtain：A=(0,0)；F=
Meaning representated by (- L ,-H) each symbol is as follows：F：Mechanical advantage, P：Useful production resistance, Q：Driving force, it is known that bent
Handle-each bar of triangular coupling rod-elbow-bar mechanism size AB=r, BC=L3, CD=L2, BD=L4, CE=L1, DF=L5, L：Sliding block
With the horizontal distance between A point, H：Vertical distance between sliding block and A point；
Step 2: vector convert clockwise be it is known, such as formula (1), vector a (p, q) turn clockwise the angle θ obtain vector b (x,
Y), it is known that vector rotates clockwise transformation for mula：
And then using vector transformation formula (1) according to vectorIt is converted toSuch as formula (2)：
Note：β is the ∠ BEC in Δ BEC,
And then using vector transformation formula (1) according to vectorIt is converted toSuch as formula (3)：
Note：γ is the ∠ BCD in Δ BCD,
Step 3: verification vectorsWith vectorIntersection point K, when ABK is conllinear, sliding block is located near top dead center, and is mechanical advantage
Maximum point position, only works as vectorWith vectorWhen not parallel can invocation point K, and using K point to straight line AB distance be 0,
When i.e. ABK is conllinear, α is solved；The angle α, the mechanical advantage pole of the as described servo-pressing machine are collinearly obtained according to ABK.
2. a kind of mechanical advantage pole of servo-pressing machine as described in claim 1 determines method, it is characterised in that：The step
Rapid three, the angle α, the mechanical advantage pole of the as described servo-pressing machine are collinearly obtained according to ABK；According to the machinery benefit in step 3
Beneficial pole arranges the position between workpiece and sliding block.
3. a kind of mechanical advantage pole of servo-pressing machine as described in claim 1 determines method, it is characterised in that：The step
Rapid three, the angle α, the mechanical advantage pole of the as described servo-pressing machine are collinearly obtained according to ABK；According to the machinery benefit in step 3
Beneficial pole optimizes triangular coupling rod structure.
4. a kind of mechanical advantage pole of servo-pressing machine as described in claim 1 determines method, it is characterised in that：The step
Rapid three, the angle α, the mechanical advantage pole of the as described servo-pressing machine are collinearly obtained according to ABK；According to the machinery benefit in step 3
Beneficial pole carries out type selecting to the motor of driving crank AB.
5. a kind of servo pressure, the mechanical advantage pole including a kind of servo-pressing machine of such as claim 1 determine method for pair
The design of the location of workpiece, the design of triangular coupling rod size, the design of choice of electrical machine.
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Effective date of registration: 20211112 Address after: 511300 west of Xinsha highway (plant), huangshatou village, Xintang Town, Zengcheng District, Guangzhou City, Guangdong Province Patentee after: Guangzhou Eaton Testing Technology Service Co., Ltd Address before: 510006 No. 100, Waihuan West Road, University Town, Panyu District, Guangzhou City, Guangdong Province Patentee before: Guangdong University of Technology |