CN102829988A - Testing device for vertical and continuous loading at optional position of numerical control moving table - Google Patents
Testing device for vertical and continuous loading at optional position of numerical control moving table Download PDFInfo
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- CN102829988A CN102829988A CN201210287185XA CN201210287185A CN102829988A CN 102829988 A CN102829988 A CN 102829988A CN 201210287185X A CN201210287185X A CN 201210287185XA CN 201210287185 A CN201210287185 A CN 201210287185A CN 102829988 A CN102829988 A CN 102829988A
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Abstract
The invention discloses a testing device for vertical and continuous loading at an optional position of a numerical control moving table and belongs to the technical field of mechanical manufacturing. The testing device comprises a simulated numerical control moving table, a gantry frame, a transverse moving mechanism and a vertical loading device. Position of a loading point and magnitude of vertical load are loading requirements need to be met by the loading device, and axial position control, transverse position control and vertical load control are achieved by a servo motor respectively. Feedback of magnitude of the vertical load is achieved by a pressure sensor, and closed-loop control of magnitude of vertical loading force is achieved by regulating compression amount of a loading spring. Vertical loading at an optional position of the moving table can be achieved, and magnitude of the loading force can be precisely controlled by the testing device.
Description
Technical field
The invention belongs to machinery manufacturing technology field, be specifically related to a kind of in the optional position of numerical control travelling table the vertical continuous load testing machine.
Background technology
Worktable is one of important composition of CNC machine tool, mainly is used for installing workpiece and bearing load.The numerical control travelling table mainly adopts servo feed system to drive as the present widely used worktable of numerically-controlled machine, has the bearing accuracy height, operates steadily, rubs little and advantage such as inertia is low.For guaranteeing the dynamic property of numerical control travelling table, need the dynamic design of research servo feed system theoretical, therefore need carry out some relevant experimental verifications.For improving the reliability of experiment, need as much as possible the stand under load situation of travelling table to be simulated.Travelling table mainly bears vertically in the course of the work, laterally with along the axial load of ball-screw; Wherein, Vertical load is produced during perpendicular to the travelling table feeding by workpiece own wt and cutter; Be the main load that travelling table bears, so travelling table vertical loading device is the part of outbalance in the load testing machine.
Existing charger has modes such as hydrostatic transmission loading, mechanical drive loading and counterweight loading usually.Hydrostatic transmission loading and mechanical drive load mode can only realize that all fixed point loads, and when movable workbench, can't carry out servo-actuated and load.The counterweight load mode is a weight block of making some groups of different sizes, stamps threaded hole at the diverse location of worktable simultaneously, in use, as required, realizes vertical loading at the diverse location fixed weight piece of worktable.This load mode is fairly simple, realizes easily, and be method commonly used at present, but this method need be made more weight block, when the big vertical load of simulation, special consume material, carrying is inconvenient.In addition, the counterweight Loading Method can only load a fixing load at every turn, can't realize continuous loading, and the position that loads receives the restriction of the threaded hole position on the worktable.
Therefore, above-mentioned load mode all can't be realized the vertical loading value according to the required simulation of numerical control travelling table, in time and controllably continuously changes the size and the position of loading force.
Summary of the invention
For addressing the above problem; The present invention proposes a kind of optional position at the numerical control travelling table and realize the test unit that vertical continuous loads, described test unit comprises simulation numerical control travelling table, gantry frame, transverse moving mechanism and vertical loading device:
The structure of described simulation numerical control travelling table is: on base 1, be furnished with the first parallel rail plate 2 and second rail plate 3; First ball-screw 4 has been arranged in parallel in the middle of described first rail plate 2 and second rail plate 3; First ball-screw 4 supports through the first ball-screw fixed supporting seat 5 and the unsteady supporting seat 6 of first ball-screw that is fixed on the base 1; And direct-connected at the external part of the first ball-screw fixed supporting seat 5 through first shaft coupling 7 and first servomotor 8, first servomotor 8 is fixed on the base 1 through first motor cabinet 9; On described first rail plate 2, be furnished with first slide block 10, on described second rail plate 3, be furnished with second slide block 11; On described first ball-screw 4, be connected with first feed screw nut 12 of flange pattern, on described first feed screw nut 12, be connected with the first feed screw nut seat 13; The upper fixed of described first slide block 10, second slide block 11 and the first feed screw nut seat 13 has been connected travelling table 14, on described travelling table 14, is coated with the cover plate 15 of surfacing;
The structure of described gantry frame is: first column 16 and the upper end of second column 17 that are vertically mounted on the said base 1 are connected through crossbeam 18, thereby form a gantry frame; Described first column 16 and second column stood in travelling table 14 both sides in 17 minutes; Described crossbeam 18 is laterally parallel with travelling table 14;
The structure of described transverse moving mechanism is: second ball-screw 19 that is arranged in crossbeam 18 1 sides; The second ball-screw fixed supporting seat 20 and the unsteady supporting seat 21 of second ball-screw through being fixed on the crossbeam 18 support; And direct-connected at the external part of the second ball-screw fixed supporting seat 20 through second shaft coupling 22 and second servomotor 23, second servomotor 23 is fixed on the crossbeam 18 through second motor cabinet 24; On described second ball-screw 19, be connected with second feed screw nut 25 of the form of flanges that is fixedly connected with the second feed screw nut seat 26; Opposite side at described crossbeam 18 is furnished with the 3rd rail plate 27; On described the 3rd rail plate 27, be furnished with the 3rd slide block 28 that is fixedly connected with fixed head 29; The described second feed screw nut seat 26 links to each other with described fixed head 29 through web joint 30;
The structure of described vertical loading device is: the 3rd servomotor 32 is fixed on the fixed head 29 through the 3rd motor cabinet 31, and its rotating shaft is vertical with travelling table 14; The 3rd ball-screw 34 is direct-connected with described the 3rd servomotor 32 through the 3rd shaft coupling 33, and supports through the 3rd ball-screw fixed supporting seat 35 that is fixed on the fixed head 29; The 3rd feed screw nut 36 of form of flanges is socketed on described the 3rd ball-screw 34; On described the 3rd feed screw nut 36 pressure transducer 37 is installed; The other end of described the 3rd ball-screw 34 and connector 38 are connected through screw thread; Linear bearing 39 is placed in the hole that connector 38 opposite sides open, and is used to guide the cylindrical end of ball-and-socket 40 to slide up and down therein; The other end of described ball-and-socket 40 is hollow semisphere, is used to hold loading ball 41; Between described ball-and-socket 40 and pressure transducer 37, loading spring 42 is installed.
Beneficial effect of the present invention is:
The test unit that vertical continuous loads is realized in a kind of optional position at the numerical control travelling table of the present invention; Drive charger moving in a lateral direction through transverse moving mechanism at travelling table; While first servomotor 8 can drive travelling table and move along its axis, thereby realizes loading the loading of ball in the travelling table optional position;
The present invention adopts and loads ball and load, and when loading, almost is to contact with cover plate owing to load ball, when dynamic load, can guarantee that adding load is perpendicular to the travelling table plane all the time;
Load the position of ball on work top through first servomotor 8 and 23 controls of second servomotor, can accurately control loading position according to the needs that load;
The decrement of the spring that the present invention is used is controlled through the 3rd servomotor 32, at the terminal setting pressure sensor of spring, therefore can realize the accurate control to the loading force size through closed-loop control simultaneously;
Second ball-screw 19 and the 3rd rail plate 27 are arranged in the both sides of crossbeam, thereby make structure simpler, can reduce simultaneously owing to the bending moment of vertical load to second ball- screw 19 and 27 generations of the 3rd rail plate;
Charger only applies vertical load to travelling table; Therefore the 3rd ball-screw 34 adopts the cantilevered supporting way; Simultaneously because the friction that loads between ball and the ball-and-socket is less; Therefore do not design vertical guide rail in the both sides of the 3rd ball-screw 34, simplify the structure so greatly, do not influence the effect of loading simultaneously again.
Description of drawings
Fig. 1 is a test unit one-piece construction synoptic diagram of the present invention, main gantry frame and the transverse moving mechanism of showing;
Fig. 2 is a numerical control simulation travelling table synoptic diagram of the present invention;
Fig. 3 is a test unit one-piece construction synoptic diagram of the present invention, the main vertical loading mechanism that shows;
Fig. 4 is a vertical loading mechanism of the present invention decomposition texture synoptic diagram partly;
Fig. 5 is the controlling schemes block diagram that device of the present invention adopts.
Embodiment
Below in conjunction with accompanying drawing the test unit in the loading of the optional position of numerical control travelling table realization vertical continuous that the present invention proposes is done detailed explanation:
As depicted in figs. 1 and 2, the structure of simulation numerical control travelling table of the present invention is: on base 1, be furnished with the first parallel rail plate 2 and second rail plate 3; First ball-screw 4 has been arranged in parallel in the middle of described first rail plate 2 and second rail plate 3; First ball-screw 4 supports through the first ball-screw fixed supporting seat 5 and the unsteady supporting seat 6 of first ball-screw that is fixed on the base 1; And direct-connected at the external part of the first ball-screw fixed supporting seat 5 through first shaft coupling 7 and first servomotor 8, first servomotor 8 is fixed on the base 1 through first motor cabinet 9; On described first rail plate 2, be furnished with first slide block 10, on described second rail plate 3, be furnished with second slide block 11; On described first ball-screw 4, be connected with first feed screw nut 12 of flange pattern, on described first feed screw nut 12, be connected with the first feed screw nut seat 13; The upper fixed of described first slide block 10, second slide block 11 and the first feed screw nut seat 13 has been connected travelling table 14, on described travelling table 14, is coated with the cover plate 15 of surfacing;
As shown in Figure 1, the structure of gantry frame of the present invention is: first column 16 and the upper end of second column 17 that are vertically mounted on the said base 1 are connected through crossbeam 18, thereby form a gantry frame; Described crossbeam 18 is laterally parallel with described travelling table 14;
As shown in figures 1 and 3; The structure of transverse moving mechanism of the present invention is: second ball-screw 19 that is arranged in crossbeam 18 1 sides; The second ball-screw fixed supporting seat 20 and the unsteady supporting seat 21 of second ball-screw through being fixed on the crossbeam 18 support; And direct-connected at the external part of the second ball-screw fixed supporting seat 20 through second shaft coupling 22 and second servomotor 23, second servomotor 23 is fixed on the crossbeam 18 through second motor cabinet 24; On described second ball-screw 19, be connected with second feed screw nut 25 of the form of flanges that is fixedly connected with the second feed screw nut seat 26; Opposite side at described crossbeam 18 is furnished with the 3rd rail plate 27; On described the 3rd rail plate 27, be furnished with the 3rd slide block 28 that is fixedly connected with fixed head 29; The described second feed screw nut seat 26 links to each other with described fixed head 29 through web joint 30;
Shown in Fig. 3 and 4, the structure of vertical loading device of the present invention is: the 3rd servomotor 32 is fixed on the fixed head 29 through the 3rd motor cabinet 31, and its rotating shaft is vertical with the plane of travelling table 14; The 3rd ball-screw 34 is direct-connected with described the 3rd servomotor 32 through the 3rd shaft coupling 33, and supports through the 3rd ball-screw fixed supporting seat 35 that is fixed on the fixed head 29; The 3rd feed screw nut 36 of form of flanges is socketed on described the 3rd ball-screw 34; On described the 3rd feed screw nut 36 pressure transducer 37 is installed; The other end of described the 3rd ball-screw 34 and connector 38 are connected through screw thread.Linear bearing 39 is placed in the hole that connector 38 opposite sides open, and is used to guide the cylindrical end of ball-and-socket 40 to slide up and down therein; The other end of described ball-and-socket 40 is hollow semisphere, is used to hold loading ball 41; Between described ball-and-socket 40 and pressure transducer 37, loading spring 42 is installed.
The course of work of the test unit that vertical continuous loads is realized in a kind of optional position at the numerical control travelling table of the present invention, and details are as follows:
As shown in Figure 5, load(ing) point position and vertical load size are the loading requirements of the required realization of this charger; Wherein, the control of the axial location of loading position is accomplished by first servomotor 8, and the lateral attitude control of loading position is accomplished by second servomotor 23, and vertical load control is accomplished by the 3rd servomotor 32;
Like Fig. 1, Fig. 2 and shown in Figure 5; The axial location of load(ing) point is converted into the position control instruction of first servomotor 8; First servomotor 8 rotates according to position command value drive motor axle; Drive 4 rotations of first ball-screw through first shaft coupling 7, the rotation of first ball-screw 4 converts moving axially of first feed screw nut 12 into; The first feed screw nut seat 13 through being fixedly connected on first feed screw nut 12 drives travelling table 14 moving axially along first ball-screw 4; Because the axial location that loads need not point-devicely be controlled, therefore position feedback and the velocity feedback through first servomotor 8 realizes that half-closed loop control can meet the demands;
Like Fig. 1, Fig. 3 and shown in Figure 5; The lateral attitude of load(ing) point is converted into the position control instruction of second servomotor 23; Second servomotor 23 rotates according to position command value drive motor axle; Drive 19 rotations of second ball-screw through second shaft coupling 22; The rotation of second ball-screw 19 converts moving axially of second feed screw nut 25 into; The second feed screw nut seat 26 through being fixedly connected on second feed screw nut 25 drives the axially-movable of web joint 30 along second ball-screw 19, and web joint 30 slides on the 3rd rail plate 27 through the fixed head 29 drive vertical loading devices that are fixedly connected above that, thereby has realized the lateral attitude control of load(ing) point; Because the lateral attitude that loads does not need point-device control equally, therefore position feedback and the velocity feedback through second servomotor 23 realizes that half-closed loop control can meet the demands;
Like Fig. 3, Fig. 4 and shown in Figure 5, convert the vertical load size of required loading the decrement of loading spring 42 into through the displacement-curve of load of loading spring 42, this compression value is the required in vertical direction movement value of the 3rd feed screw nut 36; The 3rd servomotor 32 is according to the rotation of the converted position control command value drive motor axle of the required compression value of loading spring 42; Drive 34 rotations of the 3rd ball-screw through the 3rd shaft coupling 33; The rotation of the 3rd ball-screw 34 converts moving axially of the 3rd feed screw nut 36 into; Thereby loading spring 42 is compressed, and then through ball-and-socket 41 pressure is conducted to and to load ball 40, the surface of cover plate 15 is applied vertical loading; Because in loading procedure, load ball 40 and cover plate 15 and be and contact, guaranteed that loading force is all the time perpendicular to the surface of cover plate 15; Load ball 40 rolling arbitrarily in ball-and-socket 41, thereby realize the variation of loading position easily; The socket cap of ball-and-socket 41 upper ends is led by linear bearing 39, guarantees ball-and-socket 41 motion in vertical direction all the time; Be provided with pressure transducer 37 in the upper end of loading spring 42; In the process that loads, the force value that records is fed back; Through comparing with required vertical load size; Convert the deviation load value into loading spring 42 required compression adjustment amount, readjust, realized closed-loop control vertical loading power size through the position of 32 pairs the 3rd feed screw nuts 36 of the 3rd servomotor.
Claims (1)
1. the test unit that vertical continuous loads is realized in the optional position at the numerical control travelling table, it is characterized in that, described test unit comprises simulation numerical control travelling table, gantry frame, transverse moving mechanism and vertical loading device:
The structure of described simulation numerical control travelling table is: on base (1), be furnished with parallel first rail plate (2) and first rail plate (3); First ball-screw (4) has been arranged in parallel in the middle of described first rail plate (2) and first rail plate (3); First ball-screw (4) supports through the first ball-screw fixed supporting seat (5) and the unsteady supporting seat (6) of first ball-screw that is fixed on the base (1); And direct-connected at the external part of the first ball-screw fixed supporting seat (5) through first shaft coupling (7) and first servomotor (8), first servomotor (8) is fixed on the base (1) through first motor cabinet (9); On described first rail plate (2), be furnished with first slide block (10), on described first rail plate (3), be furnished with second slide block (11); On described first ball-screw (4), be connected with first feed screw nut (12) of flange pattern, on described first feed screw nut (12), be connected with the first feed screw nut seat (13); The upper fixed of described first slide block (10), second slide block (11) and the first feed screw nut seat (13) has been connected travelling table (14), on described travelling table (14), is coated with the cover plate (15) of surfacing;
The structure of described gantry frame is: first column (16) and the upper end of second column (17) that are vertically mounted on the said base (1) are connected through crossbeam (18), thereby form a gantry frame; Described first column (16) and second column (17) branch stand in travelling table (14) both sides; Described crossbeam (18) is laterally parallel with travelling table (14);
The structure of described transverse moving mechanism is: second ball-screw (19) that is arranged in crossbeam (18) one sides; The second ball-screw fixed supporting seat (20) and the unsteady supporting seat (21) of second ball-screw through being fixed on the crossbeam (18) support; And direct-connected at the external part of the second ball-screw fixed supporting seat (20) through second shaft coupling (22) and second servomotor (23), second servomotor (23) is fixed on the crossbeam (18) through second motor cabinet (24); On described second ball-screw (19), be connected with second feed screw nut (25) of the form of flanges that is fixedly connected with the second feed screw nut seat (26); Opposite side at described crossbeam (18) is furnished with the 3rd rail plate (27); On described the 3rd rail plate (27), be furnished with the 3rd slide block (28) that is fixedly connected with fixed head (29); The described second feed screw nut seat (26) links to each other with described fixed head (29) through web joint (30);
The structure of described vertical loading device is: the 3rd servomotor (32) is fixed on the fixed head (29) through the 3rd motor cabinet (31), and its rotating shaft is vertical with travelling table (14); The 3rd ball-screw (34) is direct-connected through the 3rd shaft coupling (33) and described the 3rd servomotor (32), and supports through the 3rd ball-screw fixed supporting seat (35) that is fixed on the fixed head (29); The 3rd feed screw nut (36) of form of flanges is socketed on described the 3rd ball-screw (34); Pressure transducer (37) is installed on described the 3rd feed screw nut (36); The other end of described the 3rd ball-screw (34) is connected through screw thread with connector (38); Linear bearing (39) is placed in the hole that connector (38) opposite side opens, and is used to guide the cylindrical end of ball-and-socket (40) to slide up and down therein; The other end of described ball-and-socket (40) is hollow semisphere, is used to hold loading ball (41); Between described ball-and-socket (40) and pressure transducer (37), loading spring (42) is installed.
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| CN201210287185.XA CN102829988B (en) | 2012-08-13 | 2012-08-13 | Testing device for vertical and continuous loading at optional position of numerical control moving table |
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| CN201210287185.XA CN102829988B (en) | 2012-08-13 | 2012-08-13 | Testing device for vertical and continuous loading at optional position of numerical control moving table |
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| CN102829988B CN102829988B (en) | 2015-04-15 |
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| CN104458303A (en) * | 2014-11-24 | 2015-03-25 | 吉林大学 | Heavy numerical control vertical lathe reliability test system |
| CN104614170A (en) * | 2015-02-04 | 2015-05-13 | 吴中经济技术开发区越溪斯特拉机械厂 | Testing pressing-down mechanism of slide rail testing machine |
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| CN109470458A (en) * | 2018-10-25 | 2019-03-15 | 陈动文 | A kind of combined key-press test machine |
| CN110375969A (en) * | 2019-06-27 | 2019-10-25 | 武汉理工大学 | For the anti-device for hooking performance test of grid screen work |
| CN110658860A (en) * | 2019-09-09 | 2020-01-07 | 北京航空航天大学 | Servo motor pressure and clearance control device under position mode |
| CN110658860B (en) * | 2019-09-09 | 2021-01-22 | 北京航空航天大学 | Servo motor pressure and clearance control device under position mode |
| CN110567375A (en) * | 2019-10-11 | 2019-12-13 | 哈尔滨理工大学 | Multi-workpiece parallel vision measurement precision sliding table |
| CN111162698A (en) * | 2020-03-09 | 2020-05-15 | 山东大学 | Constant-voltage bracket PID brushless direct current motor fuzzy control system and method for AGV |
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