CN103521575B - 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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- CN103521575B CN103521575B CN201310539876.9A CN201310539876A CN103521575B CN 103521575 B CN103521575 B CN 103521575B CN 201310539876 A CN201310539876 A CN 201310539876A CN 103521575 B CN103521575 B CN 103521575B
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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, particularly relate 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 elastic deformation upwards, and workbench middle part produces downward elastic deformation, makes bending part occur deflection deformation, have impact on the profile angle of bending part.Specifically, as shown in figs. 12-15, in large-tonnage bender, due to the reason of equipment stiffness by itself, often occur that the uneven phenomenon of the processing bending part linearity of workpiece 14, angle (shows as workpiece two ends folding line darker, and because the reason of slide block or workbench distortion causes folding line excessively shallow in the middle part of workpiece), thus effectively can not meet the processing request of workpiece.
, there is the shortcoming that pollution, precision controlling difference and cost are high in most mode adopting fluid pressure type to compensate in prior art: 1), using hydraulic cylinder as the power source providing bending power; 2), for reaching the synchronism of slide block two ends hydraulic oil cylinder driving, usually need to arrange the feedback of grating scale as moving displacement at slide block two ends, expensive, working environment adaptability is poor, and cost is high, and synchronous control accuracy is poor; 3), the down maneuver of the non-bending of slide block mainly by deadweight, speed is slow.
Need the power source of separate compensation in prior art, increase cost; Simultaneously, the scope of application is little, result of use is poor, only at full load, can compensate slide block or workbench according to set compensated curve, once change operating pressure, workpiece is caused again to produce deflection deformation by because compensated curve set on bender cannot change; Meanwhile, the processing situation of unbalance loading or semi-load cannot be effectively applicable to.
Summary of the invention
The present invention is directed to above problem, provide a kind of structure simple, energy-saving and environmental protection, be 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 servomotor, a pair actuating arm, long connecting rod, small rod and swing arm;
Two angles, lower end of described compensation beam are hinged on described slide block top margin respectively, the middle part of described compensation beam is arranged with a pair microscler chute one and chute two, described slide block is arranged with a pair microscler chute three and chute four, described chute one and chute three homonymy, described chute two and chute four homonymy;
The upper and lower end of actuating arm described in a pair is located in chute one, three and in chute two, four respectively, and moves along groove; Described servomotor drives the upper end of described actuating arm by gear drive, and 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 and is positioned at the both sides of described compensation beam, and the upper end thereof of described swing arm is on described fuselage, and lower end connects one end of described long connecting rod and one end of small rod respectively by hinge one;
Described long connecting rod and small rod have a pair respectively and described long connecting rod and small rod lay respectively at the both sides of 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 top, side of described slide block.
Described gear drive comprises tooth bar, rotating shaft, gear, a pair roller and reductor, described tooth bar is located in described chute one, two respectively, described rotating shaft is located in the upper end of described actuating arm, a pair roller housing is located in described rotating shaft, described gear is located in described rotating shaft, with described rotating shaft and is rigidly connected, described gear described in a pair between roller, described tooth bar described in a pair between roller, described gear and described tooth bar suitable;
Described rotating shaft connects described reductor, described driven by servomotor reductor.
Two angles, lower end of described compensation beam are hinged on the top, side of described slide block respectively.
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 produced in link assembly (i.e. actuating arm, swing arm, long connecting rod and small rod) conducted inside by flexibility compensating device is as balancing force, on the one hand, independent power source is saved; On the other hand, the amount of force compensating the size of strength and servomotor is proportional, according to load from Row sum-equal matrix, can realize the adaptive equalization of different operating load deflexion.
Adopt generic servo motor as power source, link assembly has huge boosting function (at work, the outer angle not connecting long connecting rod between swing arm and small rod is less than 180 °), required 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, absolute synchronization can be realized, cost is low, linkage has quick, low force production in non-bending stroke, the characteristic that low speed, great export 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 sectional 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 in background technology of the present invention after workpiece bending,
Figure 13 is the left view of Figure 12,
Figure 14 be the B-B of Figure 12 to sectional view,
Figure 15 is the stereogram of Figure 12,
Figure 16 be in prior art non-bending and unloaded time slide block base deformation schematic diagram,
Figure 17 be in prior art just in bending and semi-load time slide block base deformation schematic diagram,
Figure 18 be in prior art just in bending and unbalance loading time slide block base deformation schematic diagram;
In figure, 1 is fuselage, and 2 is slide blocks, and 21 is chutes three, and 22 is chutes four, 3 is workbench, and 4 is lower risers, and 5 is compensate beam, and 51 is chutes one, 52 is chutes two, and 61 is actuating arms one, and 62 is actuating arms two, and 7 is swing arms, 8 is long connecting rods, and 9 is small rods, and 10 is servomotors, and 11 is gear drives, 110 is tooth bars, and 111 is rotating shafts, and 112 is gears, and 113 is rollers, 114 is reductors, and 12 is hinges one, and 13 is hinges two, and 14 is 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, a 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 L2 and the support reaction that its top is subject to is F1B;
Dotted line in Figure 16-18 is horizontal line, and solid line is the hemline of slide block.
Detailed description of the invention
As shown in figs. 1-11, described bender comprises fuselage 1, slide block 2, workbench 3 and flexibility compensating device in the present invention; 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 servomotor 10, a pair 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 described slide block 2 top margin respectively, the middle part of described compensation beam 5 is arranged with a pair microscler chute 1 and chute 2 52, described slide block 2 is arranged with a pair microscler chute 3 21 and chute 4 22, described chute 1 and chute 3 21 homonymy, described chute 2 52 and chute 4 22 homonymy;
The upper and lower end of actuating arm described in a pair is located in chute one, three and in chute two, four respectively, 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 moves respectively in respective groove.
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 and is positioned at the both sides of described compensation beam 5, the upper end thereof of described swing arm 7 is on described fuselage 1, and lower end connects one end of described long connecting rod 8 and one end (realizing being movably hinged by engaging lug, hinge one between three) of small rod 9 respectively by hinge 1;
Described long connecting rod 8 and small rod 9 have a pair respectively and described long connecting rod 8 and small rod 9 lay respectively at the both sides of described swing arm 7; At work, the outer angle not connecting 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 top, side of described slide block 2.
Described gear drive 11 comprises tooth bar 110, rotating shaft 111, gear 112, pair roller 113 and reductor 114, described tooth bar 110 is located in described chute one, two respectively, 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, with described rotating shaft 111 and is rigidly connected, described gear 112 is between roller described in a pair 113, described tooth bar 110 is between roller described in a pair 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 the top, side of described slide block respectively, and namely the pin joint compensated between beam and slide block can be same point.
As Figure 7-8, servomotor 10 driven gear transmission mechanism 11 drive link mechanism action, thus band movable slider 2 works.
Operation principle of the present invention is:
One, full load, as shown in figs. 9-10:
First carry out force analysis to overall (slide block and flexibility compensating device), under the effect of uniform bending load q, the tie point on the top of flexibility compensating device produces support reaction F1, is a pair active force and reaction force with q.Then F1=M × q(wherein M be the constant determined by the length of workpiece).
Then force analysis is carried out to link assembly (i.e. actuating arm, swing arm, long connecting rod and small rod), 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, according to the size of F1, the size of F2, F3, F4 can be solved.
Again slide block and compensation rate are considered as an entirety and carry out force analysis, as shown in Figure 10, then this entirety 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 at an a p-F3Y and p-F4 under the effect of the component of vertical direction, the elastic deformation top upwards caused by q is returned, reaches the effect of deflection compensation.
In above-mentioned, the size of balancing force is: F3Y=K3 × F1, F4=K4 × F1(wherein K3, K4 are constants that is long by the bar of mechanism and position decision); Like this, when bender is when the workpiece of different-stiffness, namely when operating pressure changes, the load q of workpiece " feedback " changes thereupon, now M, K are constant, thus make F3Y and F4 can the proportional change along with the change of q, namely make balancing force and according to the size of load from Row sum-equal matrix, effectively achieve amount of deflection when different operating load and can carry out the object of adaptive equalization.
Two, during unbalance loading, as shown in figure 11:
Assuming that flexibility compensating device top is respectively by support reaction F1A and F1B, wherein the spacing of F1A and unbalance loading after load mid point is the spacing of L1, F1B and unbalance loading after load mid point is L2, and load is F after converting, then:
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)；
Can obtain in conjunction with above-mentioned formula: the balancing force that the support reaction the closer to the mid point of unbalance loading after load produces is larger, like this, the size of balancing force can be made to change along with the change of the position of the mid point of the load of unbalance loading all the time, thus make this case also effectively can 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 | |
| Non-bending (zero load) | As shown in figure 16 | The base of slide block keeps level |
| (be fully loaded with) during bending | 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 (2)
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 servomotor, a pair actuating arm, long connecting rod, small rod and swing arm;
Two angles, lower end of described compensation beam are hinged on described slide block top margin respectively, the middle part of described compensation beam is arranged with a pair microscler chute one and chute two, described slide block is arranged with a pair microscler chute three and chute four, described chute one and chute three homonymy, described chute two and chute four homonymy;
The upper and lower end of actuating arm described in a pair is located in chute one, three and in chute two, four respectively, and moves along groove; Described servomotor drives the upper end of described actuating arm by gear drive, and 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 and is positioned at the both sides of described compensation beam, and the upper end thereof of described swing arm is on described fuselage, and lower end connects one end of described long connecting rod and one end of small rod respectively by hinge one;
Described long connecting rod and small rod have a pair respectively and described long connecting rod and small rod lay respectively at the both sides of 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 top, side of described slide block;
Described gear drive comprises tooth bar, rotating shaft, gear, a pair roller and reductor, described tooth bar is located in described chute one, two respectively, described rotating shaft is located in the upper end of described actuating arm, a pair roller housing is located in described rotating shaft, described gear is located in described rotating shaft, with described rotating shaft and is rigidly connected, described gear described in a pair between roller, described tooth bar described in a pair between roller, described gear and described tooth bar suitable;
Described rotating shaft connects described reductor, described driven by servomotor reductor.
2. a kind of amount of deflection adaptive equalization mechanical servo numerical control bender according to claim 1, it is characterized in that, two angles, lower end of described compensation beam are hinged on the top, side of described slide block respectively.
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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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| CN201310539876.9A CN103521575B (en) | 2013-11-04 | 2013-11-04 | Deflection adaptive compensation type mechanical servo numerical control bending machine |
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| CN103521575B true CN103521575B (en) | 2015-05-13 |
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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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| CN203526283U (en) * | 2013-11-04 | 2014-04-09 | 江苏扬力数控机床有限公司 | Deflection self-adaption compensation mechanical type servo numerical control bending machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100875708B1 (en) * | 2007-10-30 | 2008-12-26 | 주식회사 일우산업기계 | Bed crowning system for cnc press brake |
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Patent Citations (6)
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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 |
| CN101020367A (en) * | 2007-03-22 | 2007-08-22 | 广州广船国际股份有限公司 | Synchronously linearly operating interlinkage mechanism and oil press therewith |
| CN201079803Y (en) * | 2007-09-13 | 2008-07-02 | 济南铸锻所捷迈机械有限公司 | Digital control hydraulic bending machine with automatic deflection compensation device |
| CN201456435U (en) * | 2009-07-14 | 2010-05-12 | 十堰海岚机床有限公司 | Connecting rod force increasing mechanism of servo press machine |
| CN101700544A (en) * | 2009-11-12 | 2010-05-05 | 朱斌 | Numerical control torque synchronous hydraulic bender slide block flexivity compensation mechanism |
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