CN103521575A - Deflection adaptive compensation type mechanical servo numerical control bending machine - Google Patents
Deflection adaptive compensation type mechanical servo numerical control bending machine Download PDFInfo
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- CN103521575A CN103521575A CN201310539876.9A CN201310539876A CN103521575A CN 103521575 A CN103521575 A CN 103521575A CN 201310539876 A CN201310539876 A CN 201310539876A CN 103521575 A CN103521575 A CN 103521575A
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Abstract
Disclosed is a deflection adaptive compensation type mechanical servo numerical control bending machine. The deflection adaptive compensation type mechanical servo numerical control bending machine is simple in structure, saving in energy, environmentally friendly, easy to assemble, and high in accuracy. The bending machine comprises a machine body, a sliding block, a working table and a deflection compensation device, wherein the deflection compensation device is connected to the sliding block and comprises a compensation beam, a pair of servo motors, a pair of driving arms, a long connecting rod, a small connecting rod and a swinging arm, and two lower end angles of the compensation beam are both hinged to the top edge of the sliding block. According to the deflection adaptive compensation type mechanical servo numerical control bending machine, component force generated from the transmission of bending load force inside a connecting rod assembly is used as compensation force through the deflection compensation device, on one hand, an independent power source is saved, on the other hand, the compensation force is in proportion to the action force of the servo motor and can be adjusted automatically according to the load, and then adaptive compensation of deflection of different working loads can be achieved.
Description
Technical field
The present invention relates to bender, relate in particular to a kind of amount of deflection adaptive equalization mechanical servo numerical control bender.
Background technology
Numerical control bender is when bending workpieces, and the middle part of slider of bender produces strain upwards, and workbench middle part produces downward strain, makes bending part occur deflection deformation, has affected the moulding angle of bending part.Specifically, as shown in Figure 12-15, in large-tonnage bender, reason due to equipment self rigidity, the inhomogeneous phenomenon of processing bending part linearity, angle that often occurs workpiece 14 (shows as workpiece two ends folding line darker, and workpiece middle part is because the reason of slide block or workbench distortion causes the folding line excessively shallow), thus the processing request of workpiece can not effectively be met.
Most modes that adopt fluid pressure types compensation in prior art: 1), using hydraulic cylinder as the power source that bending power is provided, exist pollute, precision controls poor and the high shortcoming of cost; 2), for reaching the synchronism of slide block two ends hydraulic oil cylinder driving, grating scale need to be set at slide block two ends conventionally as the feedback of moving displacement, expensive, working environment adaptability is poor, cost is high, synchronous control accuracy is poor; 3), the down maneuver of the non-bending of slide block is mainly by deadweight, speed is slow.
The power source that needs separate compensation in prior art, increases cost; Simultaneously, the scope of application is little, result of use is poor, only can, at full load, according to set compensated curve, slide block or workbench be compensated, once change operating pressure, cannot change the compensated curve due to set on bender and cause workpiece again to produce deflection deformation; Meanwhile, cannot effectively be applicable to the processing situation of unbalance loading or semi-load.
Summary of the invention
The present invention is directed to above problem, provide a kind of simple in structure, energy-saving and environmental protection, are convenient to assembling, the amount of deflection adaptive equalization mechanical servo numerical control bender that precision is high.
Technical scheme of the present invention is: described bender comprises fuselage, slide block, workbench and flexibility compensating device; Described flexibility compensating device is connected on described slide block;
Described flexibility compensating device comprises a compensation beam, a pair of servomotor, a pair of actuating arm, long connecting rod, small rod and swing arm;
Two angles, lower end of described compensation beam are hinged on respectively on described slide block top margin, the middle part of described compensation beam is arranged with a pair of microscler chute one and chute two, on described slide block, be arranged with a pair of microscler chute three and chute four, described chute one and chute three homonymies, described chute two and chute four homonymies;
The upper and lower end of a pair of described actuating arm is located at respectively in chute one, three and in chute two, four, and moves along groove; Described servomotor drives the upper end of described actuating arm by gear drive, the length of described actuating arm is greater than the vertical range between described chute one and chute three;
Described swing arm has a pair of and is positioned at the both sides of described compensation beam, and the upper end of described swing arm is hinged on described fuselage, and lower end connects respectively one end of described long connecting rod and one end of small rod by hinge one;
Described long connecting rod and small rod have respectively the both sides that a pair of and described long connecting rod and small rod lay respectively at described swing arm;
The other end of described long connecting rod is connected to the lower end of described actuating arm by hinge two;
The other end of described small rod is hinged on the side top of described slide block.
Described gear drive comprises tooth bar, rotating shaft, gear, a pair roller and reductor, described tooth bar is located at respectively in described chute one, two, described rotating shaft is located in the upper end of described actuating arm, a pair of roller housing is located in described rotating shaft, described gear is located in described rotating shaft, is rigidly connected with described rotating shaft, described gear is between a pair of described roller, and described tooth bar is between a pair of described roller, and described gear and described tooth bar are suitable;
Described rotating shaft connects described reductor, described driven by servomotor reductor.
Two angles, lower end of described compensation beam are hinged on respectively the side top of described slide block.
Mechanical type bender in the present invention makes full use of the achievement in research of theory of mechanisms, rational mechanics, Elasticity, component bending load force being produced in link assembly (being actuating arm, swing arm, long connecting rod and small rod) conducted inside by flexibility compensating device is power by way of compensation, on the one hand, saved independent power source; On the other hand, the compensation size of strength and the amount of force of servomotor are proportional, can adjust voluntarily according to load, can realize the adaptive equalization of different operating load deflexion.
Adopt common servomotor as power source, link assembly has huge boosting function (at work, the outer angle that does not connect long connecting rod between swing arm and small rod is less than 180 °), needed bending power can be provided, without greasy dirt, encoder on servomotor in real time by the Displacement Feedback at slide block two ends to digital control system, can realize absolute synchronization, cost is low, linkage has quick, low force production in non-bending stroke, the characteristic of low speed, large force production in bending stroke, power utilization is high.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention,
Fig. 2 is the left view of Fig. 1,
Fig. 3 is the top view of Fig. 1,
Fig. 4 is the cutaway view of middle gear transmission mechanism of the present invention,
Fig. 5 is three-dimensional structure diagram one of the present invention,
Fig. 6 is three-dimensional structure diagram two of the present invention,
Fig. 7 is the structural representation of slide block closed action of the present invention,
Fig. 8 is the structural representation that slide block of the present invention lifts action,
Fig. 9 is fundamental diagram one of the present invention,
Figure 10 is fundamental diagram two of the present invention,
Figure 11 is fundamental diagram three of the present invention,
Figure 12 is the structural representation after workpiece bending in background technology of the present invention,
Figure 13 is the left view of Figure 12,
Figure 14 be the B-B of Figure 12 to cutaway view,
Figure 15 is the stereogram of Figure 12,
Figure 16 is not bending and slide block base deformation schematic diagram when unloaded in prior art,
Figure 17 is the slide block base deformation schematic diagram when bending and semi-load just in prior art,
Figure 18 is the slide block base deformation schematic diagram when bending and unbalance loading just in prior art;
In figure, 1 is fuselage, the 2nd, and slide block, the 21st, chute three, 22nd, chute four, the 3rd, workbench, the 4th, lower riser, the 5th, compensation beam, the 51st, chute one, the 52nd, chute two, 61st, actuating arm one, 62nd, actuating arm two, 7th, swing arm, the 8th, long connecting rod, the 9th, small rod, the 10th, servomotor, the 11st, gear drive, the 110th, tooth bar, the 111st, rotating shaft, the 112nd, gear, the 113rd, roller, the 114th, reductor, the 12nd, hinge one, 13rd, hinge two, 14th, workpiece;
Full load: q is bending load, F1 is the support reaction of flexibility compensating device top tie point, and F2 is the external force that small rod is subject to, and F3X is the horizontal component that actuating arm upper end is subject to, F3Y is the vertical stress component that actuating arm upper end is subject to, and F4 is the external force that actuating arm lower end is subject to;
During unbalance loading: F is total power of load, top in flexibility compensating device and the distance of load mid point be L1 and its top be subject to support reaction be F1A, the distance of another top and load mid point is that the support reaction that L2 and its top are subject to is F1B;
Dotted line in Figure 16-18 is horizontal line, the hemline that solid line is slide block.
The specific embodiment
The present invention is as shown in Fig. 1-11, and described bender comprises fuselage 1, slide block 2, workbench 3 and flexibility compensating device; Described flexibility compensating device is connected on described slide block 2, and workbench 3 is located on lower riser 4;
Described flexibility compensating device comprises a compensation beam 5, a pair of servomotor 10, a pair of actuating arm (actuating arm 1 and actuating arm 2 62), long connecting rod 8, small rod 9 and swing arm 7;
Two angles, lower end of described compensation beam 5 are hinged on respectively on described slide block 2 top margins, the middle part of described compensation beam 5 is arranged with a pair of microscler chute 1 and chute 2 52, on described slide block 2, be arranged with a pair of microscler chute 3 21 and chute 4 22, described chute 1 and chute 3 21 homonymies, described chute 2 52 and chute 4 22 homonymies;
The upper and lower end of a pair of described actuating arm is located at respectively in chute one, three and in chute two, four, and moves along groove; The upper end of actuating arm 1 is located in chute 1, lower end is located in chute 3 21; The upper end of actuating arm 2 62 is located in chute 2 52, lower end is located in chute 4 22; The upper and lower end of actuating arm 1 and actuating arm 2 62 is moving in groove respectively separately.
Described servomotor 10 drives the upper end of described actuating arm by gear drive 11, the length of described actuating arm is greater than the vertical range between described chute 1 and chute 3 21;
Described swing arm 7 has a pair of and is positioned at the both sides of described compensation beam 5, the upper end of described swing arm 7 is hinged on described fuselage 1, and lower end connects respectively one end of described long connecting rod 8 and one end of small rod 9 (between three, by engaging lug, hinge one, realized and being movably hinged) by hinge 1;
Described long connecting rod 8 and small rod 9 have respectively the both sides that a pair of and described long connecting rod 8 and small rod 9 lay respectively at described swing arm 7; At work, the outer angle that does not connect long connecting rod between swing arm and small rod is less than 180 °, has boosting function, and Stability Analysis of Structures, result of use are good.
The other end of described long connecting rod 8 is connected to the lower end of described actuating arm by hinge 2 13;
The other end of described small rod 9 is hinged on the side top of described slide block 2.
Described gear drive 11 comprises tooth bar 110, rotating shaft 111, gear 112, a pair roller 113 and reductor 114, described tooth bar 110 is located at respectively in described chute one, two, described rotating shaft 111 is located in the upper end of described actuating arm, one pair roller 113 is set in described rotating shaft 111, described gear 112 is located in described rotating shaft 111, is rigidly connected with described rotating shaft 111, described gear 112 is between a pair of described roller 113, described tooth bar 110 is between a pair of described roller 113, and described gear 112 is suitable with described tooth bar 110;
Described rotating shaft 111 connects described reductor 114, and described servomotor 10 drives reductor 114.
Two angles, lower end of described compensation beam are hinged on respectively the side top of described slide block, and the pin joint compensating between beam and slide block can be same point.
As Figure 7-8, servomotor 10 driven gear transmission mechanism 11 drive link mechanism actions, thereby 2 work of band movable slider.
Operation principle of the present invention is:
One, full load, as shown in Fig. 9-10:
First whole (slide block and flexibility compensating device) carried out to force analysis, under the effect of uniform bending load q, the tie point on the top of flexibility compensating device produces support reaction F1, with q be a pair of active force and reaction force.F1=M * q(wherein M be the constant being determined by the length of workpiece).
Then link assembly (being actuating arm, swing arm, long connecting rod and small rod) is carried out to force analysis, as shown in Figure 9, actuating arm, swing arm, long connecting rod and small rod form a balanced system of force, at F1(vector, have size, direction and application point), under the acting in conjunction of F2, F3X, F3Y, F4, leverage keeps stress balance, because bar is long and relative position is known, can, according to the size of F1, solve the size of F2, F3, F4.
Again slide block and compensation rate are considered as to an integral body and carry out force analysis, as shown in figure 10, this integral body is under the effect of q, a p-F2, a p-F3X ,-F3Y and a p-F4, form balanced system of force, slide block can be at a p-F3Y and a p-F4 under the effect of the component of vertical direction, the strain making progress being caused by q is pushed up back, reached the effect of deflection compensation.
In above-mentioned, the size of balancing force is: F3Y=K3 * F1, F4=K4 * F1(be the constant of the long and determining positions of the bar of K3 ,K4Shi You mechanism wherein); Like this, when bender is faced the workpiece of different-stiffness, while being operating pressure change, the load q of workpiece " feedback " changes thereupon, now M, K are constant, thereby make F3Y and the F4 can the proportional change along with the change of q, make balancing force and adjust voluntarily according to the size of load, the object that while effectively having realized in the face of different operating load, amount of deflection can be carried out adaptive equalization.
Two, during unbalance loading, as shown in figure 11:
Suppose that flexibility compensating device top is subject to respectively support reaction F1A and F1B, wherein the spacing of F1A and unbalance loading after load mid point is L1, and the spacing of F1B and unbalance loading after load mid point is L2, and load is F after converting:
F1A=F×L2/(L1+L2)；F1B=F×L1/(L1+L2)；
Balancing force is:
F3YA=K3×F1=K3×F×L2/(L1+L2)，F4A=K4×F1=K4×F×L2/(L1+L2)；
F3YB=K3×F2=K3×F×L1/(L1+L2)，F4B=K4×F2=K4×F×L1/(L1+L2)；
In conjunction with above-mentioned formula, can obtain: the balancing force producing the closer to the support reaction of the mid point of unbalance loading after load is larger, like this, the size that can make balancing force is all the time along with the change of the position of the mid point of the load of unbalance loading and change, thereby makes this case also can effectively be applicable to the processing situation of unbalance loading or semi-load.
Like this, this case difference with the prior art can show as:
| ? | Prior art | This case |
| Not bending (zero load) | As shown in figure 16 | The base of slide block keeps level |
| During bending, (be fully loaded with) | The base of slide block keeps level | The base of slide block keeps level |
| During bending (semi-load) | As shown in figure 17 | The base of slide block keeps level |
| During bending (unbalance loading) | As shown in figure 18 | The base of slide block keeps level |
Claims (3)
1. an amount of deflection adaptive equalization mechanical servo numerical control bender, described bender comprises fuselage, slide block, workbench and flexibility compensating device; It is characterized in that, described flexibility compensating device is connected on described slide block;
Described flexibility compensating device comprises a compensation beam, a pair of servomotor, a pair of actuating arm, long connecting rod, small rod and swing arm;
Two angles, lower end of described compensation beam are hinged on respectively on described slide block top margin, the middle part of described compensation beam is arranged with a pair of microscler chute one and chute two, on described slide block, be arranged with a pair of microscler chute three and chute four, described chute one and chute three homonymies, described chute two and chute four homonymies;
The upper and lower end of a pair of described actuating arm is located at respectively in chute one, three and in chute two, four, and moves along groove; Described servomotor drives the upper end of described actuating arm by gear drive, the length of described actuating arm is greater than the vertical range between described chute one and chute three;
Described swing arm has a pair of and is positioned at the both sides of described compensation beam, and the upper end of described swing arm is hinged on described fuselage, and lower end connects respectively one end of described long connecting rod and one end of small rod by hinge one;
Described long connecting rod and small rod have respectively the both sides that a pair of and described long connecting rod and small rod lay respectively at described swing arm;
The other end of described long connecting rod is connected to the lower end of described actuating arm by hinge two;
The other end of described small rod is hinged on the side top of described slide block.
2. a kind of amount of deflection adaptive equalization mechanical servo numerical control bender according to claim 1, is characterized in that,
Described gear drive comprises tooth bar, rotating shaft, gear, a pair roller and reductor, described tooth bar is located at respectively in described chute one, two, described rotating shaft is located in the upper end of described actuating arm, a pair of roller housing is located in described rotating shaft, described gear is located in described rotating shaft, is rigidly connected with described rotating shaft, described gear is between a pair of described roller, and described tooth bar is between a pair of described roller, and described gear and described tooth bar are suitable;
Described rotating shaft connects described reductor, described driven by servomotor reductor.
3. a kind of amount of deflection adaptive equalization mechanical servo numerical control bender according to claim 1 and 2, is characterized in that, two angles, lower end of described compensation beam are hinged on respectively the side top of described slide block.
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| CN201310539876.9A CN103521575B (en) | 2013-11-04 | 2013-11-04 | Deflection adaptive compensation type mechanical servo numerical control bending machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109108158A (en) * | 2017-06-26 | 2019-01-01 | 嘉意机床（上海）有限公司 | A kind of bending machine wallboard ratio deformation compensating mechanism |
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Patent Citations (7)
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| CN2865904Y (en) * | 2006-01-20 | 2007-02-07 | 江苏富力数控机床有限公司 | Automatic deflection-compensated numerically controlled bending machine |
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| CN109108158A (en) * | 2017-06-26 | 2019-01-01 | 嘉意机床（上海）有限公司 | A kind of bending machine wallboard ratio deformation compensating mechanism |
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