CN104028860A - Gantry structure of large electric discharge machine tool - Google Patents
Gantry structure of large electric discharge machine tool Download PDFInfo
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- CN104028860A CN104028860A CN201410267749.2A CN201410267749A CN104028860A CN 104028860 A CN104028860 A CN 104028860A CN 201410267749 A CN201410267749 A CN 201410267749A CN 104028860 A CN104028860 A CN 104028860A
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Abstract
The invention discloses a gantry structure of a large electric discharge machine tool. The gantry structure comprises a base, fixed uprights, a side beam, movable uprights, cross beams, saddles and spindles, the lower ends of the fixed uprights are fixed on one side of the base, the side beam is fixed at the upper ends of the fixed uprights, the movable uprights are mounted on a lower guide rail platform on the other side of the base and can slide on the lower guide rail platform along a guide rail, and the movable uprights and the side beam jointly support the cross beams, in other words, one ends of the cross beams are supported on the movable uprights while the other ends of the same are supported on the side beam; the saddles are mounted on the cross beams and can slide on the same, each spindle is mounted on the corresponding saddle through a line rail slider and can slide in the corresponding saddle, the cross beams, the movable uprights, the saddles and the spindles jointly form the gantry structure, motion of each saddle in the X-axis direction is driven by a servo motor mounted on the corresponding cross beam, and motion of each spindle in the Z-axis direction is driven by a servo motor mounted on the corresponding spindle. The gantry structure is large in stroke, high in accuracy and efficiency, high in adaptability, high in rigidity and stability and wide in processing range.
Description
Technical field
The present invention is a kind of gantry structure of large-scale spark-erosion machine tool, belongs to the innovative technology of the gantry structure of large-scale spark-erosion machine tool.
Background technology
Along with the needs that macrostructure size mould is manufactured, spark-erosion machine tool is towards the future development of high efficiency, large scale, low surface roughness, and large stroke, large scale and high-precision spark-erosion machine tool are important process technology and the equipment that currency must develop.The Novel long-stroke electric discharge machine that research and development processing work size is large, working (machining) efficiency is high, has very important application development prospect.At present, the large-scale spark-erosion machine tool on market still adopts two ox head structures, and reason is unilaterally to consider that loading and unloading workpiece is convenient, the solution not had on lathe integral layout.Can know according to mechanical structure, cattle-head machine tool structure is actually a kind of single stand column and beam cantilever design, in the effect situation of dead load power and main tapping end spark processing work exciting force, the stress deformation at crossbeam and main shaft position is serious, particularly in the time of spindle processing servo feed, very easily produces and trembles.For the main shaft electric discharge machine of bottom and top feed repeatedly, also can vibrative stack interfere, have a strong impact on working (machining) efficiency and the machining accuracy of lathe.Traditional two ox head lathes are in order to reduce as far as possible the distortion of straight skidding ox head structure, the support component of ox head crossbeam below often does to such an extent that size is thick, very heavy, and the moving components such as ox head main shaft do very littlely, mechanical structure is extremely unreasonable, gives intuitively the very inharmonic sensation of people's one.Also the limitation of this structural principle just, is restricted the main shaft size of spark machine installing electrodes, thereby affects the working ability of spark machine.Along with the longitudinal width dimensions of spark machine increases, the problems such as the structural stability of lathe highlight more, and two cattle-head lathes of traditional structure can not have breakthrough.Machine tool field has movable beam type or moving pillar gantry structure technology, whether is applicable to spark-erosion machine tool, and analysis shows improper.This is because spark-erosion machine tool workpiece size is large, Heavy Weight, and lathe must the large-scale work tank of device, and this working environment and above-mentioned machining tool have basic different.For example movable beam type gantry structure, liquid bath door is difficult to arrange, and lifting workpiece just can only carry out up and down from lathe top, very inconvenient.Moving pillar gantry structure can be vacateed by mobile gantry frame the space of lifting workpiece, but the work tank that must arrange will make gantry span too strengthen, and the power performance of gantry-travelling structure is also poor.Thereby, must start with from new construction, develop that precision is higher, stroke is larger, move electric discharge machine more stably, to meet, mould maximizes, the trend requirement of integration.
Summary of the invention
The object of the invention is to consider to address the above problem and provide a kind of and be out of shape little, good stability, the range of work is wide, stroke is large, the large-scale spark-erosion machine tool gantry structure of the structure proportion of lathe coordination.The present invention is reasonable in design, convenient and practical.
Technical scheme of the present invention is: large-scale spark-erosion machine tool of the present invention is post and beam gantry structure, include base, vertical columns, curb girder, moving column, crossbeam, saddle, main shaft, wherein the lower end of vertical columns is fixed on a side of base, curb girder is fixed on the upper end of vertical columns, moving column is installed on the lower guideway platform of base opposite side, and can on lower guideway platform, slide along guide rail, moving column and the common bearing cross beam of curb girder, the one end that is crossbeam is bearing on moving column, the other end of crossbeam is bearing on curb girder, saddle is installed on crossbeam, and saddle can slide on crossbeam, same by line rail slide block, main shaft is arranged on saddle, main shaft can slide in saddle, crossbeam, moving column, saddle, main shaft has formed gantry frame structure jointly, saddle in the motion of X-direction by the driven by servomotor being installed on crossbeam, main shaft in the motion of Z-direction by the driven by servomotor being mounted thereon.
The present invention, owing to adopting main shaft to be placed in the structure on crossbeam, realizes the motion of Y-axis and Z-direction by being installed on saddle on crossbeam, make its motion more steady, and machining accuracy is higher.The two ends dual-support structure that crossbeam adopts, compared with existing ox head structure, can make main shaft larger at the stroke of Y direction, makes spark-erosion machine tool processing characteristics of the present invention better.And machine tool beam of the present invention adopts double-girder type structure, can not produce tilting moment, machining accuracy is easier to ensure.The gantry structure of beam column combined type, two portal frames can move left and right, and work tank door can be opened in addition, so the unlimited property of this structure spark machine is good, convenient and practical.Compared with single supporting construction of the dual-support structure of gantry structure of the present invention and existing ox head machine ox head, rigidity is higher, and stability is better, is out of shape littlely, and version is more reasonable, and the range of work is wide, and stroke is large, and the structure proportion of lathe is coordinated.The present invention is that a kind of design is ingenious, function admirable, the gantry structure of convenient and practical large-scale spark-erosion machine tool.
Brief description of the drawings
Fig. 1 is the large-scale spark-erosion machine tool structural perspective of the present invention;
Fig. 2 is the large-scale spark-erosion machine tool structure side of the present invention view;
Fig. 3 is the base schematic diagram of the large-scale electric discharge machine bed structure of the present invention;
Fig. 4 is the guide rail platform schematic diagram of the large-scale electric discharge machine bed structure of the present invention;
Fig. 5 is the vertical columns schematic diagram of the large-scale electric discharge machine bed structure of the present invention;
Fig. 6 is the support unit schematic diagram of the large-scale electric discharge machine bed structure of the present invention;
Fig. 7 is the crossbeam schematic diagram of the large-scale electric discharge machine bed structure of the present invention;
Fig. 8 is the large-scale spark-erosion machine tool gantry frame structure of the present invention schematic diagram;
Fig. 9 be in Fig. 8 A-A to schematic diagram;
Figure 10 is that the large-scale electric discharge machine bed structure of the present invention has been installed the full figure after work tank.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the present invention are further elaborated:
If Fig. 1 is the Facad structure figure of the gantry structure of the large-scale spark-erosion machine tool of the present invention, the gantry structure of large-scale spark-erosion machine tool of the present invention, comprise the vertical columns 2 being placed on base 1, on vertical columns 2, be fixed with curb girder 3, crossbeam slide plate 4 is installed on curb girder 3, and crossbeam slide plate 4 can be free to slide at directions X along curb girder 3; The opposite side of the base corresponding with vertical columns 2, is provided with the lower guideway platform 5 of lathe, on it, by straight-line guide rail slide block, the moving column 6 of lathe is installed, and moving column 6 and curb girder 3 have supported crossbeam 7 jointly.On crossbeam 7, by line slideway and slide block thereof, saddle 8 is installed, by line rail slide block, main shaft 9 is mounted thereon equally.Crossbeam 7, moving column 6, saddle 8, main shaft 9 have formed gantry frame structure 10 jointly, and this is also moving component all in machine tool structure of the present invention.The motion of portal frame X-direction is driven by the turning motor 11 being installed on crossbeam 7, and in the present embodiment, turning motor 11 is servomotors, and the crossbeam 7 that is arranged on curb girder 3 one end adopts servomotor 11 to drive nut 13 to drive.On it, main shaft 10 is driven by the servomotor 12 being mounted thereon in the motion of Z-direction.Safe and attractive in appearance in order to ensure, on the lower guideway platform in the front of lathe, baffle plate is installed.In the present embodiment, described curb girder 3 is overhead girder, and lower end is supported by two or more vertical columns 2.
From front, the gantry structure of large-scale spark-erosion machine tool of the present invention has two gantry frame structures 10 in left and right, just as two ox head spark machines have two ox heads.But compared with single supporting construction of the dual-support structure of gantry structure and existing ox head machine ox head, rigidity is higher, stability is better, is out of shape littlely, and version is more reasonable.
The main shaft 9 of the large-scale electric discharge machine bed structure of the present invention is placed on crossbeam 7, realizes the motion of Y-axis and Z-direction by being installed on cross saddle 8 on crossbeam 7, makes its motion more steady, and machining accuracy is higher.The two ends dual-support structure that crossbeam 7 adopts, compared with existing ox head structure, can make main shaft larger at the stroke of Y direction, makes spark-erosion machine tool processing characteristics of the present invention better.
Preferably, as can be seen from Figure 1, X axis stroke is large, X-axis screw mandrel is long, thus when moving, crossbeam 7 easily causes a vibration of bar, therefore the crossbeam 7 of curb girder one end adopts turning motor 11 directly to drive feed screw nut 13 and the fixing type of drive of screw mandrel, as shown in Figure 8, to reduce screw rod vibration, increase the stationarity that crossbeam 7 moves, under moving column, square slide 20 adopts identical type of drive.
For the present invention can be implemented in more excellent mode, as shown in Figure 3, described moving column 6 adopts version wide at the top and narrow at the bottom, meets mechanics principle, and support effects is better, gives again beautiful visual effect.
As shown in Figure 3, base 1 is fixedly connected with lower guideway platform 5 by the front end installed surface 200 that is positioned at its front end face, the upper surface of above-mentioned base 1 is processed with the upper end installed surface 300 being fixedly connected with workbench 14, its underpart is evenly equipped with the set bolt hole slot 400 being connected with ground, and workbench 14 is fixedly connected with by upper end installed surface 300 with base 1.Ensure assembly precision, reduced the trouble that moving component is installed.
As shown in Figure 4, the inner side of electric discharge machine lower guideway platform 5 of the present invention is cast with groove 500, its objective is the unlatching in order to facilitate lathe work tank.
On above-mentioned lower guideway platform 5, the position being close to groove 500 is processed with guide rails assembling face 700, and guide rail platform two ends are processed with the installed surface 600 of screw mandrel holder 15 simultaneously.Its front end face bottom has the bolt hole slot 800 being fixedly connected with ground.
As shown in Figure 5, the inner side of above-mentioned vertical columns 2 is processed with column installed surface 900, on column installed surface 900, has bolt hole, to be fixedly connected with base 1; Base 1 is fixedly connected with vertical columns 2 column installed surfaces 900 by the rear portion installed surface 100 that is positioned at its rear portion, and its advantage is: ensured assembly precision, reduced the trouble that moving component is installed.In addition, the upper end of vertical columns 2 is processed with curb girder installed surface 1000, and curb girder installed surface 1000 has bolt hole, and curb girder 3 is fixed on the bolt hole of the set curb girder installed surface 1000 of vertical columns 2, connects simple and convenient.
As shown in Figure 6, supporting structure 16 of the present invention was realized by following connection: base 1 is fixedly connected with vertical columns 2, lower guideway platform 5 by installed surface, and vertical columns 2 is fixedly connected with curb girder 3 by installed surface, workbench 14 is same with base 1 to be fixedly connected with by installed surface 300.
More excellent scheme is, the crossbeam 7 in the present invention adopts twin-spar construction 1100 as shown in Figure 7, and this structure makes the symmetrically stressed of crossbeam both sides, avoids the generation of tilting moment, has improved machining accuracy.
The crossbeam 7 of above-mentioned twin-spar construction, its top is processed with two symmetrical guide rails assembling faces 1200, and inside one side of twin beams 1100 is processed with the installed surface 1300 that main shaft Y-direction drive motors screw mandrel is installed, and in the corresponding position of installed surface, has process window 1400.
As shown in Figure 8, in order to make the main shaft 9 can be in the steady lifting of Z-direction, the special cavity structure that saddle 8 is designed to enclosed, limit its movement locus by being installed on four line slideways on main shaft 9 and the slide block being installed on saddle 8, the motion of the Z-direction of main shaft 9 is driven by the servomotor 12 on it.
Further, as shown in Figure 9, the Y-axis motion of main shaft is driven by the servomotor 17 that is installed on crossbeam inner side, and servomotor 17 directly drives saddle 8, drives the main shaft 9 being mounted thereon to move in Y direction.
As shown in figure 10, spark machine of the present invention is provided with work tank 18, and work tank 18 is arranged on above base 1, and workbench 14 is placed in work tank 18.The door of above-mentioned work tank 18 has automatic open close function, and staff can enter debugging lathe in it.
With regard to large-scale electric discharge machine bed structure of the present invention, introduce four kinds of operation principle patterns below:
Work piece hoisting pattern:
A kind of large-scale electric discharge machine bed structure, in the time of clamping workpiece, the door of work tank 18 is opened automatically, its main shaft 9 gos up to certain altitude, gantry frame structure 10 moves to respectively two ends extreme position, and workpiece enters liquid bath by liquid bath door hoisting, clamping on workbench 14.
Single shaft cooked mode:
A kind of large-scale electric discharge machine bed structure, clamping workpiece well after, mobile one of them gantry frame structure 10, to top, position to be processed, is adjusted main shaft 9, till the tool-electrode 19 that makes to be mounted thereon can normally be worked, it is motionless that another portal frame is parked in extreme position.Now operating personnel from work tank 18 out, close liquid bath door, open the oil storage function of work tank, to pump oil in liquid bath, until fluid submergence workpiece, tool-electrode 19 can normally be worked.
Twin shaft cooked mode:
A kind of large-scale electric discharge machine bed structure, clamping workpiece well after, mobile two gantry frame structures 10 are to workpiece to be processed top, adjust successively main shaft 9, two tool-electrodes 19 can normally be worked, now operating personnel walk out work tank 18, close liquid bath door, treat that work tank 18 oil storages reach normal place, two main shafts 9 can be worked simultaneously, and working (machining) efficiency is higher.
The cooked mode of closing without work tank door:
A kind of large-scale electric discharge machine bed structure, when processing is compared with small workpiece, or place to be processed is less, now the tool-electrode 19 required working solution of switching on is less, and needs often to observe the machining state of workpiece, in this case, be undoubtedly a kind of waste of the energy with the work tank oil storage of large volume, just can meet the needs of spark machined with oil nozzle oil spout, thereby needn't close the door of work tank 18, watch at any time processing progress to facilitate, also saved the energy.In fact, most of occasions of spark machined, all without closing work tank.
Non-ly therefore limit to protection scope of the present invention, therefore such as use the equivalence techniques that description of the present invention and diagramatic content are done to change, be all contained in protection scope of the present invention.
Claims (10)
1. the gantry structure of a large-scale spark-erosion machine tool, it is characterized in that including base, vertical columns, curb girder, moving column, crossbeam, saddle, main shaft, wherein the lower end of vertical columns is fixed on a side of base, curb girder is fixed on the upper end of vertical columns, moving column is installed on the lower guideway platform of base opposite side, and can on lower guideway platform, slide along guide rail, moving column and the common bearing cross beam of curb girder, the one end that is crossbeam is bearing on moving column, the other end of crossbeam is bearing on curb girder, saddle is installed on crossbeam, and saddle can slide on crossbeam, same by line rail slide block, main shaft is arranged on saddle, main shaft can slide in saddle, crossbeam, moving column, saddle, main shaft has formed gantry frame structure jointly, saddle in the motion of X-direction by the driven by servomotor being installed on crossbeam, main shaft in the motion of Z-direction by the driven by servomotor being mounted thereon.
2. the gantry structure of large-scale spark-erosion machine tool according to claim 1, it is characterized in that being provided with on above-mentioned curb girder crossbeam slide plate, crossbeam slide plate can be free to slide at directions X along curb girder, and on crossbeam slide plate, is provided with the interlocking travel switch for preventing collision; Described curb girder is overhead girder, and lower end is supported by two or more vertical columns.
3. the gantry structure of large-scale spark-erosion machine tool according to claim 1, is characterized in that above-mentioned crossbeam is by line slideway and slide block installation saddle thereof; Above-mentioned main shaft is arranged on saddle by line slideway and slide block thereof.
4. the gantry structure of large-scale spark-erosion machine tool according to claim 1, is characterized in that the opposite side of above-mentioned base is provided with lower guideway platform, and moving column is arranged on lower guideway platform by line slideway and slide block thereof.
5. the gantry structure of large-scale spark-erosion machine tool according to claim 1, is characterized in that above-mentioned saddle is cross saddle; Above-mentioned moving column adopts version wide at the top and narrow at the bottom; Above-mentioned crossbeam adopts twin-spar construction.
6. the gantry structure of large-scale spark-erosion machine tool according to claim 1, is characterized in that the above-mentioned crossbeam that is arranged on curb girder one end adopts turning motor to drive feed screw nut to drive.
7. according to the gantry structure of the large-scale spark-erosion machine tool described in claim 1 to 6 any one, it is characterized in that the inner side of above-mentioned vertical columns is processed with column installed surface, on floor installation face, have bolt hole, to be fixedly connected with base; Base, by being positioned at the installed surface at its rear portion and the installed surface of vertical columns is fixedly connected with, is fixedly connected with lower guideway platform by the front end installed surface that is positioned at its front end face; The upper surface of base is processed with the upper end installed surface being fixedly connected with workbench, and its underpart is evenly equipped with the set bolt hole slot being connected with ground, and workbench is fixedly connected with by upper end installed surface with base; The upper end of vertical columns is processed with curb girder installed surface, and curb girder installed surface has bolt hole, and curb girder is fixed on the bolt hole of the set curb girder installed surface of vertical columns.
8. according to the gantry structure of the large-scale spark-erosion machine tool described in claim 1 to 6 any one, it is characterized in that the Y-axis motion of above-mentioned main shaft is by the driven by servomotor that is installed on crossbeam inner side, servomotor directly drives saddle, drives the main shaft being mounted thereon to move in Y direction; The motion of main shaft Z-direction is by the driven by servomotor on it.
9. according to the gantry structure of the large-scale spark-erosion machine tool described in claim 1 to 6 any one, it is characterized in that above-mentioned saddle design becomes the cavity structure of enclosed, main shaft is by making it limit its movement locus at four line slideways that are mounted thereon of the steady lifting of Z-direction and the slide block being installed on saddle.
10. according to the gantry structure of the large-scale spark-erosion machine tool described in claim 1 to 6 any one, it is characterized in that being provided with work tank on above-mentioned base, workbench is placed in work tank; On lower guideway platform, baffle plate is installed.
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| CN201410267749.2A CN104028860B (en) | 2014-06-16 | 2014-06-16 | A kind of gantry structure of large-scale spark-erosion machine tool |
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| CN201410267749.2A CN104028860B (en) | 2014-06-16 | 2014-06-16 | A kind of gantry structure of large-scale spark-erosion machine tool |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106271680A (en) * | 2016-08-30 | 2017-01-04 | 佛山市普拉迪数控科技有限公司 | A kind of L-shaped Longmen machine tool |
| CN108340256A (en) * | 2018-02-09 | 2018-07-31 | 惠州市得利机械有限公司 | A kind of burnishing machine |
| CN108723530A (en) * | 2018-06-05 | 2018-11-02 | 邢建 | A kind of slow wire feeding electric discharge machining apparatus |
| CN110340411A (en) * | 2019-07-09 | 2019-10-18 | 南通远大精密机械有限公司 | A kind of two-sided main shaft column moving horizontal CNC milling machine |
| CN110899875A (en) * | 2019-11-25 | 2020-03-24 | 北京意动科技有限公司 | Wire cut electric discharge machining equipment with electrode wire capable of integrally extending into workpiece to be machined |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106271680A (en) * | 2016-08-30 | 2017-01-04 | 佛山市普拉迪数控科技有限公司 | A kind of L-shaped Longmen machine tool |
| CN108340256A (en) * | 2018-02-09 | 2018-07-31 | 惠州市得利机械有限公司 | A kind of burnishing machine |
| CN108723530A (en) * | 2018-06-05 | 2018-11-02 | 邢建 | A kind of slow wire feeding electric discharge machining apparatus |
| CN110340411A (en) * | 2019-07-09 | 2019-10-18 | 南通远大精密机械有限公司 | A kind of two-sided main shaft column moving horizontal CNC milling machine |
| CN110899875A (en) * | 2019-11-25 | 2020-03-24 | 北京意动科技有限公司 | Wire cut electric discharge machining equipment with electrode wire capable of integrally extending into workpiece to be machined |
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| CN104028860B (en) | 2016-08-31 |
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Address after: 523000 No. 3 Yanhe Road, Xicheng Industrial Zone, Hengli Town, Dongguan, Guangdong Patentee after: Dongguan Wintop Science & Technology Co., Ltd. Address before: 523470 Southern District, Waterside Industrial Park, Hengli Town, Dongguan, Guangdong Patentee before: Dongguan Wintop Science & Technology Co., Ltd. |