CN1683095A - Servo motor driven digital control plate bending machine - Google Patents
Servo motor driven digital control plate bending machine Download PDFInfo
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- CN1683095A CN1683095A CN 200510038033 CN200510038033A CN1683095A CN 1683095 A CN1683095 A CN 1683095A CN 200510038033 CN200510038033 CN 200510038033 CN 200510038033 A CN200510038033 A CN 200510038033A CN 1683095 A CN1683095 A CN 1683095A
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- ball screw
- slide block
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Abstract
The servo motor driven digitally controlled plate bending machine belongs to the field of digitally controlled machine tool. The plate bending machine consists of computerized digital control system, right and left servo motor drivers, right and left motors, right and left coders, right and left grating rules, right and left worm gear transmission pairs, nut, ball lead screw, block and frame connected together. The present invention s high efficiency, low power consumption and environment friendship.
Description
Technical field:
Servo motor driven digital control plate bending machine of the present invention belongs to numerically controlled machine tool field.
Background technology:
Plate bending machine is pressed the type of drive of slide block and is divided, and can be divided into mechanical bender and hydraulic bending press.
The machinery bender adopts the driving power of threephase asynchronous as slide block, carries out speed change with clutch coupling, and promptly by following technological requirement speed change: slide block begins down fast earlier, it is high-speed cruising, when bending operation, slide block is following slowly, when the slide block backhaul, high-speed cruising then, the shortcoming of this structure is a very flexible, is difficult to realize robotization and digital control operation, thereby, be difficult to adapt to current production requirement, be eliminated nearly decades.
Hydraulic bending press is the trend of nearly development decades, the slide block moving linearly, oil cylinder is arranged on the wallboard of both sides, connect than being easier to digital control system, but when upper and lower material, oil pump is also being worked always, so just waste energy, the hydraulic system of lathe temporarily can not can leakage of oil, but in the long run, lathe always can leakage of oil.Still more, hydraulic work system also needed to change oil after the regular hour, so just caused environmental pollution.
In order to overcome the shortcoming of above two kinds of types, just need development to save energy and protect environment and have new efficiently plate bending machine.
Summary of the invention:
The purpose of this invention is to provide a kind of servo motor driven digital control plate bending machine, with the oil cylinder of servomotor replacement slide block both sides, its operation characteristic just in time can satisfy the technological requirement of bender.
A kind of servo motor driven digital control plate bending machine, it is by Computerized digital control system, left and right servomotor driver, left and right motor, left and right inclined to one side sign indicating number device, left and right grating chi, and left and right worm and gear transmission, ball screw nut, ball screw, slide block and frame are formed; It is characterized in that Computerized digital control system links left and right servo-electric driver, left and right motor by signalling channel; Left and right scrambler directly is connected on the left and right motor respectively; Left and right grating chi lays respectively at the slide block and arranged on left and right sides; Motor output shaft is connected on the worm shaft, worm and wheel is coupled; Worm gear and screw pair ball screw nut link, and ball screw nut is installed on the ball screw, and screw mandrel is fixedly mounted on respectively in the left and right slot of slide block.
Numerically-controlled machine divides by control mode can be divided into open loop control, half-closed loop control and closed-loop control, now is summarized as follows:
1, open loop control is exactly a kind of control method of not having position feedback, mostly based on step-by-step motor, digital control system mainly determines displacement and speed with the speed of what and the frequency of sending pulse, actual how many distances of walking of slide block, digital control system can't be known, but open-loop control system is simple in structure, and control method is easy, price is also cheap, generally is used for economical simple nc machine.
2, the half-closed loop control system is equipped with the position feedback that angle measurement unit (as photoelectric encoder, rotary transformer etc.) connects as letter on servomotor, the dimensional accuracy of workpiece is that the movement travel of slide block guarantees, but the half-closed loop control system is not the displacement of directly measuring slide block, but the rotational angle of measurement motor, gear ratio according to worm and gear is calculated, calculate its position, this method obviously has limitation.Necessarily require the precision height of worm and gear processing, very close to each other and slide block coupling part can not be gapped, otherwise influence bearing accuracy.
3, closed-loop control system is that the moving-member slide block is directly measured, again the actual position feedback of measuring in numerical control device, with input instruction more whether difference is arranged, go control with this difference then, make its moving component go motion by the actual needs value, thereby realize accurately location, this method, its precision will depend on the precision of measurement mechanism, and irrelevant with the precision of driving-chain, therefore, this control accuracy is than semiclosed loop precision height.
Bender is the most widely used a kind of bending forming processing equipment, the mould that it uses is simple, versatility is good, adjust with more mold exchange is convenient, can carry out the bending of various angles and the processing that is shaped, be equipped with special dies and also can carry out punching etc., the production efficiency height has better economic when single-piece and middle small lot batch production.
On structure, common bender, the general employing of slide block turned round a method of synchronization, and structure is comparatively complicated, and when the big length of machine tonnage, turning round shaft diameter needs very big; The numerical control bender slide block adopts the twin-tub drives structure more, mostly is the electro-hydraulic servo synchronization structure greatly, and is simple in structure, is easy to arrange.
Different angles, width for bending workpieces, on bender, generally just control ram travel and the backstop material level is put, and pressure, speed etc., these parameters can be controlled with the digital control system parameter, on bender, use simple mould, after a series of continuous bendings, can obtain complicated workpiece and section bar, therefore, the numerical control process of bender maintains the leading position in metal forming machinery always.
The advantage of numerical control bender is:
1, adjusts simply
The operator only needs to programme on guidance panel, just can finish the artificial adjustment work of machine, has reduced the requirement to operating personnel's skills involved in the labour.
2, bending precision height
The various technological parameters of numerical control bender are to draw on the basis of having carried out a large amount of tests, sufficient consideration has been done in the measure that improves precision, thereby the bending precision of complex parts are that common bender is unapproachable.
3, improved throughput rate
All bendings be can in single job, finish, loading and unloading and stacking time reduced significantly.
4, alleviated labour intensity
Eliminated the half-finished repeatedly carrying of inter process, reduced artificial adjustment lathe.
5, saved middle stacking place
But the workpiece time processing finishes, and has reduced half-finished stacking place.
The mechnical servo bender also has the following advantages except keeping above numerical control bender advantage:
1, energy-conservation
Motor rotates when being slide block movement, and when slide block did not move, motor stopped operating.
2, compliance with environmental protection requirements
, the existence of hydraulic system do not bring the leakage of oil of pollution and problem such as change oil because of causing to environment.
3, travelling speed is stable
The rate that speed produces can be controlled in 0.1%.
4, speed ratio is wide
Theoretically, can realize the combination of bender arbitrary speed, and not be subjected to the restriction of cylinder structure.
5, response frequency is fast
Operation is level and smooth, and the acceleration and deceleration response is fast, the bearing accuracy height.
The principle of servo motor driven digital control bender is as follows:
The digital control system of numerical control bender calculates the stroke of slide block automatically according to data such as the length of plate and thickness, lathe external form, moulds.Behind the signal of receiving slide block operation downwards, the signalling channel of digital control system by ± 10 volts sent the instruction of operation to servomotor, and the size of analog quantity is controlled the speed of servomotor travelling speed.The stability of speed is controlled by speed ring, its principle is after the servomotor driver receives the instruction of digital control system, driving motor rotates, the state that motor rotates is via becoming square-wave signal with the direct coupled coder transitions of motor, and feed back to servo-driver, compare with speed command, with the speed of its difference correction motor, thus the travelling speed of stable electrical motivation.
The running of servomotor drives the worm screw that is attached thereto, and makes it rotate the rotation of the rotating drive worm gear of worm screw; The nut of worm gear and ball wire bar pair is fixed together, and nut is limited in the position of vertical direction, thereby the rotation of worm gear is converted into the vertical movement of ball screw above-below direction; Ball screw and slide block join together, and the vertical movement of ball screw just makes slide block do vertical movement.When slide block moves downward, measurement by the grating chi, can know the current location of slide block exactly, the grating chi feeds back to digital control system to the current location of slide block, the position that digital control system is current according to slide block, decision slide block operation attitude---fast down, slowly down, pressurize, backhaul and stop etc., constitute position ring, satisfy the bending technique requirement.
The numerical control bender that servomotor drives has replaced Hydrauservo System with servomotor, has replaced the oil cylinder of slide block both sides with the worm and gear transmission case.The servomotor response frequency can improve bending precision far above servo-valve; When slide block did not move, servomotor just stopped, and had saved the energy; The speed ratio of servomotor can reach more than 1000, can satisfy the arbitrary speed requirement of bender.The worm and gear transmission has overcome hydraulicdriven shortcoming, does not have oily cleaning problems, has protected environment.
The operation characteristic of servomotor can satisfy the technological requirement of bender fully, maximally utilises the power of servomotor, when descending high speed soon load light, then use Heng Gongshuaiqu, when descending the low speed bending slowly, load is big, then uses Heng Niujuqu.
The principle of the numerical control bender that drives according to above-mentioned servomotor, the structure of the relevant operation part of its numerical control bender is described as follows:
Respectively have an oblong aperture at the left and right two ends of slide block, in each oblong aperture, a cover worm couple respectively is installed, and worm couple is fixed on the wallboard of frame; A left side, respectively there is a servomotor on the right side, work as a left side, after right servomotor driver receives the instruction of Computerized digital control system, drive a left side respectively, right motor rotates, a left side, right motor rotary state is after directly being connected in coder transitions on the motor and becoming square-wave signal, feed back to a left side separately, right servomotor driver, compare with speed command again, with its difference correction left side, the speed of right motor, make motor operating speed stable, a left side, respectively there are a left grating chi and right grating chi in the right side, they feed back to Computerized digital control system to slide block left end current location and slide block right-hand member current location respectively, digital control system is according to the slide block current location, and the decision slide block moves attitude.
The output shaft of left and right servomotor respectively with left and right worm gear case in left and right worm shaft link by shaft coupling, bolt; Left and right worm shaft drives left and right worm gear respectively and rotates, left and right worm gear is fixed together with the nut of left and right ball wire bar pair respectively, because of nut vertical direction position is limited, so rotating, left and right worm gear should make left and right ball screw make upper and lower respectively to vertical movement, left and right ball screw lower end is fixed by the following end in contact of spherical cushion block and the left and right oblong aperture of slide block respectively, and left and right ball screw upper end is fixed by the last end in contact of regulating bolt and set nut and the left and right oblong aperture of slide block respectively.By the adjustment of adjusting bolt and fixing of set nut, can be with the upper-lower position relative fixed of slide block and ball screw, designed a fixed block in the lower end of screw mandrel, can prevent that screw mandrel from rotating, the assurance ball screw can only be done, following vertical movement, like this, under the driving of motor, by the transmission of worm and gear, ball screw can only be done, following vertical movement, and because of on the ball screw, lower end and slide position are fixed together, thereby action when realizing with slide block, a left side, right two servomotors move simultaneously, under the control of Computerized digital control system, have just realized the synchronous operation with slide block.
Description of drawings:
Fig. 1: slide block (15) connects the main synoptic diagram of looking with ball screw (2).
Among the figure: (1) adjusting bolt and set nut, (2) ball screw, (15) slide block, (16) fixed block.Fig. 2: motor (23), worm gear (19), ball screw (2) and frame (28) connect synoptic diagram.Among the figure: (1) adjusting bolt and set nut, (2) ball screw, (9) worm gear, (23) servomotor, (15) slide block, (28) wallboard (frame).
Fig. 3: worm and gear transmission master TV structure synoptic diagram.
Among the figure: (1) adjusting bolt and set nut, (2) ball screw, (3) dust ring, (4) upper side cover, (5) upside taper roll bearing, (6) upside connect axle sleeve, (7) worm gear case, (8) worm screw, (9) worm gear, (10) ball screw nut, (11) downside axle sleeve, (12) dust ring, (13) spherical cushion block.
Fig. 4: worm and gear transmission left side TV structure synoptic diagram.
Among the figure: (1) adjusting bolt and set nut, (2) ball screw, (3) dust ring, (4) upper side cover, (6) upside connect axle sleeve, (7) worm gear case, (8) worm screw, (9) worm gear, (23) servomotor.
Fig. 5: digital control system connects figure with the electric signal of servomotor closed-loop control system.
Among the figure: (17) computerized numerical system, (18) left servomotor driver, (19) left servomotor, (20) left scrambler, (21) left grating chi, (22) right servomotor driver, (23) right servomotor, (24) right scrambler, (25) right grating chi.
Fig. 6: slide block, frame, grating chi mechanical attachment synoptic diagram.
Among the figure: (15) slide block, (28) frame, (19) left servomotor, (23) right servomotor, (21) left grating chi, (25) right grating chi, (26) left worm couple, (27) right worm couple.
Embodiment:
Referring to Fig. 5, length and thickness according to plate, the lathe external form, data such as mould, the digital control system of numerical control bender (17) calculates the stroke of slide block (15) automatically, behind the signal of receiving slide block (15) operation downwards, digital control system (17) signalling channel by ± 10 volts and left servomotor driver (18) and right servomotor driver (22) respectively connects and sends the instruction of operation, and be connected to left servomotor (19) and right servomotor (23) more respectively by the size of its signal, and control the speed of left servomotor (19) and right servomotor (23) travelling speed, left side servomotor (19) and right servomotor (23) directly link with left scrambler (20) and right scrambler (24) respectively and convert its rotary state to square-wave signal respectively, and signal fed back to left servomotor driver (18) and right servomotor driver (22) by passage respectively, compare with speed command, advise machine (19) and right servomotor (23) with its difference correction left side servo-electric, make its velocity-stabilization.
Referring to Fig. 6, slide block (15) is when moving downwards, left side grating chi (21) and right grating chi (25) lay respectively at slide block (15) and arranged on left and right sides, can measure slide block (15) left end current location and right-hand member current location respectively exactly, and feed back to digital control system (17), digital control system (17) determines the operation attitude of slide block (15) according to the current position of slide block (15).
Referring to Fig. 6: the left end of slide block (15) has a slot, and left worm couple (26) is installed in its left hole, and worm couple (26) is fixed on frame (28) wallboard.Equally, also have a slot at the right-hand member of slide block (15), right worm couple (27) is installed in its right hole, right worm couple (27) also is fixed on the wallboard of frame (28).Physical construction in slide block (15) left end and the right-hand member slot is identical.
Referring to Fig. 1: in Fig. 1, ball screw (2) upper end in slide block (15) the right-hand member oblong aperture is equipped with regulates bolt and set nut (1), ball screw (2) lower end is equipped with fixed block (16) to prevent its rotation, a left side, right ball screw (2) upper end is respectively by regulating bolt and set nut (1) and slide block (a 15) left side, end in contact is fixed on the right slot, and a left side, right ball screw (2) lower end is by spherical cushion block (a 13) (see figure 3) and slide block (a 15) left side, end in contact is fixed under the right slot, thereby with ball screw (2) and slide block (15) stationkeeping, ball screw (2) and slide block (15) are moved simultaneously, and ball screw (2) is also as similarly connecting in the right-hand member oblong aperture in slide block (15) the left end oblong aperture.
Referring to Fig. 2: right worm couple (27) is installed in slide block (15) the right rectangular hole, is fixedly mounted on the wallboard of frame (28); Equally, left worm couple (26) is installed in the left slot of slide block (15), also is fixed on the wallboard of frame (28).
Referring to Fig. 3: as seen from Figure 3, regulate bolt and lock nut (1) and be installed in ball screw (2) upper end, dust ring (3) is positioned at upper side cover (4) and upside connects outside the axle sleeve (6), upper side cover (4) is installed on the worm gear case (7) by screw, and upside taper roll bearing (5) is positioned at upside and connects outside the axle sleeve (6); Ball screw (2) bottom is positioned at upside and connects axle sleeve (6) and downside axle sleeve (11); Worm screw (8) and worm gear (9) are positioned at worm gear case (7); Ball screw nut (10) is installed on the ball screw (2); Dust ring (12) is positioned at outside the downside axle sleeve (11); Spherical cushion block (13) is installed in the lower end of ball screw (2); The worm gear (9) that is meshed with worm screw (8) connects with ball screw nut (10).
Referring to Fig. 4: the output shaft of servomotor (23) is connected by the worm shaft of shaft coupling with worm screw (8); Dust ring (3) is positioned at upside and connects outside the axle sleeve (6); Upside connects axle sleeve (6) and is positioned at outside the ball screw (2); Worm screw (8) is meshed with worm gear (9), is positioned at worm gear case (7), and worm gear (9) is connected with ball screw nut (10) on the ball screw (2).、
The basic parameter of the digital control plate bending machine that servomotor of the present invention drives is as follows:
Bending tonnage: 500,000 newton; Worktable length: 2050 millimeters; Ram travel: 215 millimeters; Lift: 415 millimeters; The aditus laryngis degree of depth: 250 millimeters; Ram speed: under fast is 100 millimeters/per second; It is 1～20 mm/second that the worker advances; Backhaul is 100 a millimeters/per second.Machine weight: 2060 kilograms.
Claims (9)
1, a kind of servo motor driven digital control plate bending machine, it is by Computerized digital control system (17), a left side, right servomotor driver (18), (22), a left side, right motor (19), (23), a left side, right scrambler (20), (24), a left side, right grating chi (21), (25), an and left side, right worm and gear transmission (26), (27), ball screw nut (10), ball screw (2), slide block (15) and frame (28) are formed, and it is characterized in that Computerized digital control system (17) links a left side by signalling channel, right servomotor driver (18), (22), a left side, right motor (19), (23); Left and right scrambler (20), (24) directly are connected in respectively on left and right motor (19), (23); Left and right grating chi (21), (25) lay respectively at slide block (15) and arranged on left and right sides, and motor output shaft is connected on the worm shaft, worm screw (8) is coupled with worm gear (9); Worm gear (9) links with the ball screw nut (10) of screw pair, and ball screw nut (10) is installed on the ball screw (2), and ball screw (2) is fixedly mounted on respectively in the left and right slot of slide block (15).
2, servo motor driven digital control plate bending machine according to claim 1 is characterized in that left and right worm couple (26), (27) are installed in respectively in the left and right slot of slide block (15), are fixed on the wallboard of frame (28).
3, servo motor driven digital control plate bending machine according to claim 1, it is characterized in that being fixed on the ball screw (2) in the left and right end slot of slide block (15), its upper end is separately installed with regulates bolt and set nut (1), and the lower end is separately installed with in case the fixed block of its rotation (16).
4, servo motor driven digital control plate bending machine according to claim 1 is characterized in that worm screw (8) and worm gear (9) are positioned at worm gear case (7).
5, servo motor driven digital control plate bending machine according to claim 1 is characterized in that upper side cover (4) is installed on the worm gear case (7) by screw.
6, servo motor driven digital control plate bending machine according to claim 1 is characterized in that dust ring (3) is positioned at upper side cover (4) and upside connects outside the axle sleeve (6); Dust ring (12) is positioned at outside the downside axle sleeve (11).
7, servo motor driven digital control plate bending machine according to claim 1 is characterized in that spherical cushion block (13) is installed in the lower end of ball screw (2).
8, servo motor driven digital control plate bending machine according to claim 1 is characterized in that ball screw (2) bottom is positioned at upside and connects axle sleeve (6) and downside axle sleeve (11).
9, servo motor driven digital control plate bending machine according to claim 1 is characterized in that fixing with the last end in contact of the left and right slot of slide block (15) by regulating bolt and lock nut (1) respectively on the left and right ball screw (2); Left and right ball screw (2) lower end is fixed by the spherical cushion block (13) and the following end in contact of the left and right slot of slide block (15) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510038033 CN1683095A (en) | 2005-03-09 | 2005-03-09 | Servo motor driven digital control plate bending machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510038033 CN1683095A (en) | 2005-03-09 | 2005-03-09 | Servo motor driven digital control plate bending machine |
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| CN1683095A true CN1683095A (en) | 2005-10-19 |
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| CN 200510038033 Pending CN1683095A (en) | 2005-03-09 | 2005-03-09 | Servo motor driven digital control plate bending machine |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100391641C (en) * | 2006-03-20 | 2008-06-04 | 上海圣诺机床有限公司 | Detachable combined rear positioning structure |
| CN102259125A (en) * | 2011-07-18 | 2011-11-30 | 爱克(苏州)机械有限公司 | Follow-up material supporting device of numerical control bending machine |
| CN103111500A (en) * | 2013-02-26 | 2013-05-22 | 昆山市天之衣精工机械设备有限公司 | Electric bending machine |
| CN103575238A (en) * | 2013-10-10 | 2014-02-12 | 西安交通大学 | Angle detection device used for bending machine |
| CN110393472A (en) * | 2018-04-25 | 2019-11-01 | 添可电器有限公司 | Dust catcher |
-
2005
- 2005-03-09 CN CN 200510038033 patent/CN1683095A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100391641C (en) * | 2006-03-20 | 2008-06-04 | 上海圣诺机床有限公司 | Detachable combined rear positioning structure |
| CN102259125A (en) * | 2011-07-18 | 2011-11-30 | 爱克(苏州)机械有限公司 | Follow-up material supporting device of numerical control bending machine |
| CN103111500A (en) * | 2013-02-26 | 2013-05-22 | 昆山市天之衣精工机械设备有限公司 | Electric bending machine |
| CN103575238A (en) * | 2013-10-10 | 2014-02-12 | 西安交通大学 | Angle detection device used for bending machine |
| CN103575238B (en) * | 2013-10-10 | 2016-02-24 | 西安交通大学 | A kind of bender angle detection device |
| CN110393472A (en) * | 2018-04-25 | 2019-11-01 | 添可电器有限公司 | Dust catcher |
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