CN103659297A - Numerical control device and adjustment method for turntable position - Google Patents
Numerical control device and adjustment method for turntable position Download PDFInfo
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- CN103659297A CN103659297A CN201310396352.9A CN201310396352A CN103659297A CN 103659297 A CN103659297 A CN 103659297A CN 201310396352 A CN201310396352 A CN 201310396352A CN 103659297 A CN103659297 A CN 103659297A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/25—Movable or adjustable work or tool supports
- B23Q1/26—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
- B23Q15/20—Automatic control or regulation of feed movement, cutting velocity or position of tool or work before or after the tool acts upon the workpiece
- B23Q15/22—Control or regulation of position of tool or workpiece
- B23Q15/26—Control or regulation of position of tool or workpiece of angular position
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Abstract
The invention provides a numerical control device and an adjustment method for a turntable position. Deviation values of the turntable at a 0-degree position and at a 180-degree position can be identical. A CPU positions the turntable at a first position determined as a reference position temporarily (S1-S3), then positions the turntable at a second position and stores a first pulse value output by an encoder of a turnable motor(S4-S6). The CPU positions the turntable at the first position again (S7,S8) and stores a second pulse value output by the encoder (S9). The CPU calculates a differential value between a measured value and a reference value (S11). The measured value is a difference value between the first pulse value and the second pulse value. The reference value is equivalent to a pulse value at 180 degrees. The CPU shifts the reference position and divides the differential value into two parts to obtain equalization values, so that the reference position can be changed (S12). Therefore, the numerical control device can equalize deviation values of the first position and the second position.
Description
Technical field
The present invention relates to numerical control device and revolving table position control method.
Background technology
Numerical control device is controlled the action of lathe.Lathe comprises rotation table device.Japanese Patent Laid discloses disclosed rotation table device in 2004 No. 142081 communiques and comprises base portion, axle, turntable, fixed mechanism.Axle is located in base portion revolvably.Turntable and axle rotate integratedly.Turntable is reciprocating rotary between 0 degree position and 180 degree positions.Turntable is provided with workbench P1 and workbench P2 across pivot.Workbench P1 and workbench P2 be the machined object of surface maintenance thereon respectively.When numerical control device is positioned turntable for 0 degree position, workbench P1 is positioned at the machining area of lathe.When numerical control device is positioned turntable for 180 degree position, workbench P2 is positioned at the machining area of lathe.
Rotation table device has by mechanicalness against making it stop the shut-down mechanism of this mode.The shut-down mechanism of which has the first butt sheet and the second butt sheet, the first align member and the second align member.The first butt sheet and the second butt sheet are located at respectively the lateral surface of base portion, and they clip the pivot of turntable and by bolt etc., are fixed on identical radial location across predetermined angular (such as 90 degree).The first align member and the second align member are located at the lower face side of turntable.Numerical control device, for turntable being positioned to 0 degree position, is rotated counterclockwise turntable.The first align member and the first butt sheet butt.The position of turntable becomes 0 degree position, and operating desk P1 is positioned at machining area.Numerical control device, for turntable being positioned to 180 degree positions, turns clockwise turntable.The second align member and the second butt sheet butt.The position of turntable becomes 180 degree positions, and operating desk P2 is positioned at machining area.
The positioning instruction of numerical control device based in NC program, rotates turntable and is located in 0 degree position or 180 degree positions.Fixed mechanism is fixed being positioned the turntable of 0 degree position or 180 degree positions.Numerical control device starts to process being positioned at the workbench P1 of machining area or machined object that workbench P2 keeps.
The position of the turntable of positioning instruction institute instruction is target location, and the shift position of turntable reality is physical location.When turntable is located, in position, can produce departure.Departure is the difference between target location and physical location.While being positioned 180 degree position when turntable is positioned to 0 degree position and by turntable, departure is uneven sometimes.When departure occurs when uneven, even if numerical control device makes turntable Rotate 180 degree under the state of workbench that turntable is positioned to a side, due to for driving the loosening etc. of the CD-ROM drive motor of turntable rotation and decelerator, may block and it is stopped.Therefore, numerical control device need to make turntable clockwise and be rotated counterclockwise, and each align member and each butt sheet are distinguished under the state of butt, calculates respectively departure, and two departures are adjusted to equalization.Operator need to calculate and result of calculation is input to picture in order to regulate, therefore, and trivial operations.
Summary of the invention
The object of the present invention is to provide a kind of numerical control device and revolving table position control method, can make turntable impartial in the departure of 0 degree position and 180 degree positions.
The numerical control device of technical scheme 1 is controlled rotation table device, and above-mentioned rotation table device comprises: turntable, and this turntable can be supported in base portion at 0 degree to being rotated in the forward and counter-rotating between 180 degree around an axis, and machined object is kept, motor, this motor drives above-mentioned turntable, a pair of abutting part, this pair of abutting part is located at said base portion, and a pair of location division, above-mentioned turntable is located in this pair of location division, with any butt in above-mentioned a pair of abutting part, thereby above-mentioned turntable is positioned respectively to the primary importance corresponding with 0 degree and the second place corresponding with 180 degree, the feature of above-mentioned numerical control device is, comprise: temporary transient determination portion, this temporary transient determination portion drives said motor, make above-mentioned turntable towards a direction rotation, thereby make a location division in above-mentioned a pair of location division and an abutting part butt in above-mentioned a pair of abutting part, above-mentioned turntable is positioned to above-mentioned primary importance, and the position of above-mentioned turntable is temporarily defined as to reference position, the first location division, after above-mentioned temporary transient determination portion is positioned the position of above-mentioned turntable for above-mentioned primary importance, this first location division drives said motor, make above-mentioned turntable towards the rightabout rotation of an above-mentioned direction, and make be different from another location division of an above-mentioned location division and be different from another abutting part butt of an above-mentioned abutting part, thereby above-mentioned turntable is positioned to said second position, primary importance storage part, store the position of said motor when this primary importance storage part is positioned above-mentioned turntable for said second position to above-mentioned the first location division, the second location division, this second location division drives said motor, makes above-mentioned turntable towards an above-mentioned direction rotation, thereby makes an above-mentioned location division and an above-mentioned abutting part butt, and above-mentioned turntable is positioned to above-mentioned primary importance, second place storage part, store the position of said motor when this second place storage part is positioned above-mentioned turntable for above-mentioned primary importance to above-mentioned the second location division, difference component calculating part, the actual measured amount between the above-mentioned position that the above-mentioned position that this difference component calculating part is stored above-mentioned primary importance storage part and said second position storage part are stored and the difference component being equivalent between the datum quantity of 180 degree calculate, and changing unit, the equal equivalent obtaining after the above-mentioned difference component that this changing unit makes the skew of said reference position that above-mentioned difference component calculating part is calculated is divided into two, changes said reference position.Each departure when therefore, numerical control device can make turntable be positioned primary importance and the second place is impartial.
The feature of the numerical control device of technical scheme 2 is, except the structure that technical scheme 1 is recorded, also comprise: the first departure calculating part, the first control instruction according to indication towards the location, first object position corresponding to above-mentioned primary importance, drive said motor, make above-mentioned turntable towards an above-mentioned direction rotation, make an above-mentioned location division and an above-mentioned abutting part butt, thereby above-mentioned turntable is positioned to above-mentioned primary importance, above-mentioned the first departure calculating part is to now physical location and the difference between above-mentioned first object position of above-mentioned turntable are that the first departure is calculated, the second departure calculating part, the second control instruction according to indication towards the second location, target location corresponding to said second position, drive said motor, above-mentioned turntable is rotated towards above-mentioned rightabout, make above-mentioned another location division and above-mentioned another abutting part butt, thereby above-mentioned turntable is positioned to said second position, and above-mentioned the second departure calculating part is to now physical location and the difference between above-mentioned the second target location of above-mentioned turntable are that the second departure is calculated, difference judging part, whether the difference component between above-mentioned the second departure that above-mentioned the first departure that this difference judging part calculates above-mentioned the first departure calculating part and above-mentioned the second departure calculating part calculate judges above in setting, and reference position changing unit, the equal equivalent obtaining after the above-mentioned difference component that this reference position changing unit makes the skew of said reference position that above-mentioned difference judging part is judged is divided into two, changes said reference position, and enforcement division again, when above-mentioned difference judging part is judged as above-mentioned difference component when afore mentioned rules value is above, this again enforcement division utilize said reference position changing unit to make said reference position skew, and again carry out above-mentioned the first departure calculating part, above-mentioned the second departure calculating part, above-mentioned difference judging part each process.Difference between the first departure and the second departure is when setting is above, and one in each processing of the first departure calculating part, the second departure calculating part may occur fault.Enforcement division is carried out each processing of the first departure calculating part, the second departure calculating part again again.Therefore, numerical control device can make departure impartial reliably.
The feature of the numerical control device of technical scheme 3 is, except the structure that technical scheme 2 is recorded, also to comprise: count section, and this count section is carried out the above-mentioned number of times that each is processed to above-mentioned enforcement division again and is counted; Number of times judging part, this number of times judging part judges that the count value of above-mentioned count section is whether more than stipulated number; And notification unit, at above-mentioned number of times judging part, being judged as above-mentioned count value when afore mentioned rules number of times is above, this notification unit notice occurs abnormal.Even if enforcement division has been carried out the processing of above each portion of stipulated number again, departure is also when setting is above, and certain fault may appear in rotation table device.Because notification unit notice occurs that therefore, it is abnormal that operator can promptly tackle device extremely.
The feature of the numerical control device of technical scheme 4 is, in technical scheme 1 to 3 any structure of recording, above-mentioned first object position is the position towards above-mentioned direction skew than above-mentioned primary importance, and above-mentioned the second target location is the position towards above-mentioned rightabout skew than said second position.Therefore, rotation table device can make a location division and an abutting part butt reliably, and makes another location division and another abutting part butt.
The revolving table position control method of technical scheme 5 is revolving table position control methods that numerical control device that rotation table device is controlled carries out, above-mentioned rotation table device comprises: turntable, this turntable can be supported in base portion at 0 degree to being rotated in the forward and counter-rotating between 180 degree around an axis, and machined object is kept; Motor, this motor drives above-mentioned turntable; A pair of abutting part, this pair of abutting part is located at said base portion; And a pair of location division, above-mentioned turntable is located in this pair of location division, with any butt in above-mentioned a pair of abutting part, thereby above-mentioned turntable is positioned respectively to the primary importance corresponding with 0 degree and the second place corresponding with 180 degree, the feature of this revolving table position control method is to comprise:
Temporary transient definite operation, this temporarily determines in operation, drive said motor, make above-mentioned turntable towards a direction rotation, thereby make a location division in above-mentioned a pair of location division and an abutting part butt in above-mentioned a pair of abutting part, above-mentioned turntable is positioned to above-mentioned primary importance, and the position of above-mentioned turntable is temporarily defined as to reference position; The first positioning process, after the position of above-mentioned turntable being positioned to above-mentioned primary importance in above-mentioned temporary transient definite operation, in this first positioning process, drive said motor, make above-mentioned turntable towards the rightabout rotation of an above-mentioned direction, and make be different from another location division of an above-mentioned location division and be different from another abutting part butt of an above-mentioned abutting part, thereby above-mentioned turntable is positioned to said second position; Primary importance storage operation, in this primary importance storage operation, store the position of the said motor when above-mentioned turntable being positioned to said second position in above-mentioned the first positioning process; The second positioning process, in this second positioning process, drives said motor, makes above-mentioned turntable towards an above-mentioned direction rotation, thereby makes an above-mentioned location division and an above-mentioned abutting part butt, and above-mentioned turntable is positioned to above-mentioned primary importance; Second place storage operation, in this second place storage operation, store the position of the said motor when above-mentioned turntable being positioned to above-mentioned primary importance in above-mentioned the second positioning process; Difference component calculation process, in this difference component calculation process, the above-mentioned position of storing in above-mentioned primary importance storage operation and the difference component of storing the actual measured amount between the above-mentioned position of storing in operation in said second position and be equivalent between the datum quantity of 180 degree are calculated; And change operation, in this change operation, the equal equivalent obtaining after said reference position skew is divided into two the above-mentioned difference component calculating in above-mentioned difference component calculation process, changes said reference position.Numerical control device, by carrying out above-mentioned revolving table position control method, can obtain the effect that technical scheme 1 is recorded.
Accompanying drawing explanation
Fig. 1 is the stereogram of lathe 50.
Fig. 2 is the top view of rotation table device 1.
Fig. 3 is the I-I alignment apparent direction cutaway view of Fig. 2.
Fig. 4 is the upward view of turntable 10.
Fig. 5 is fixed mechanism 19 stereogram around.
Fig. 6 is fixed mechanism 19 top view around.
Fig. 7 means the block diagram of the electrical structure of numerical control device 70 and lathe 50.
Fig. 8 is the process chart that reference position regulates operation.
Fig. 9 is that reference position regulates the flow chart of processing.
Figure 10 is that departure is confirmed the flow chart of processing.
The specific embodiment
With reference to accompanying drawing, one embodiment of the present invention is described.With reference to Fig. 1, the structure of lathe 50 is described.Lathe 50 comprises base portion 52, machine tool main body 53, protective cover 55, control cabinet 56, rotation table device 1.Base portion 52 is bases of lathe 50.Machine tool main body 53 is located at the upper surface rear of base portion 52.53 pairs of machined objects of machine tool main body (not shown) carry out machining.Protective cover 55 is located at the top of base portion 52.Protective cover 55 surrounds machine tool main body 53.Protective cover 55 prevents from cutting powder and cutting fluid etc. and disperses towards outside from machine tool main body 53.Control cabinet 56 is located at the back side of protective cover 55.56 pairs of numerical control devices 70 of control cabinet (with reference to Fig. 7) are taken in.Numerical control device 70 is controlled the action of lathe 50 according to the NC program being stored in Nonvolatile memory devices 74.Rotation table device 1 is located at upper surface the place ahead of base portion 52.
Below the structure of machine tool main body 53 is described.Machine tool main body 53 comprises main 63, column 58, main tapping 59, main shaft 60, automatic tool change device 65.Be located at the upper surface rear of base portion 52 for main 63.Column 58 is arranged on main 63, along X-direction and Y direction, to move.Main tapping 59 can move along the front surface of column 58 in Z-direction.Main shaft 60 is located at the bottom of main tapping 59.Instrument (not shown) is installed, High Rotation Speed under the driving of Spindle Motor 92 on main shaft 60.Lathe 50 utilizes the relatively moving of machined object that is installed on the instrument of main shaft 60 and is held in the turntable 10 of rotation table device 1 to cut machined object.Automatic tool change device 65 is located near main tapping 59, according to the tool changing instruction of NC program, the instrument and other instrument that are installed on main shaft 60 is changed.
As shown in Figure 2, rotation table device 1 is provided with turntable 10 at an upper portion thereof.Turntable 10 is overlooked and is rectangle, its can be between primary importance and the second place reciprocating rotary.Primary importance is 0 degree position, and the second place is-180 degree positions (with reference to Fig. 8).Turntable 10 across pivot at the distolateral workbench P1 that is provided with of its long side direction one, at another distolateral workbench P2 that is provided with.Workbench P1, P2 can be used fixture etc. to keep machined object.When numerical control device 70 is positioned turntable 10 for primary importance, workbench P1 is positioned at the machining area of lathe 50.When turntable 10 is positioned to the second place, workbench P2 is positioned at the machining area of lathe 50.Under the state that turntable 10 is positioned to primary importance, in the machined object that utilizes 50 pairs, lathe the to be held in workbench P1 process of processing, operator can pull down the machined object having machined that is held in workbench P2, and unprocessed machined object can be installed.
With reference to Fig. 2～Fig. 6, the structure of rotation table device 1 is described.As shown in Figure 2 and Figure 3, rotation table device 1 comprises base portion 2, rotating shaft 3 (with reference to Fig. 3), turntable 10, fixed mechanism 19 (with reference to Fig. 5) etc.
As shown in Figure 3, base portion 2 is rectangular-shaped metal bases processed.Base portion 2 comprises bearing 4, outer bearing pressing piece 15, inner bearing pressing piece 16, containment member 17,18, blank part 2A, gear wheel 5, turntable motor 96 (with reference to Fig. 2) etc.Bearing 4 is overlooked and is roughly round, and it is configured to the periphery of rotating shaft 3 to surround.The outer peripheral face of rotating shaft 3 slides along the rolling surface of bearing 4.Therefore, bearing 4 can support to rotatable by rotating shaft 3.Outer bearing pressing piece 15 and inner bearing pressing piece 16 are all overlooked and are round.The diameter of outer bearing pressing piece 15 is larger than the diameter of inner bearing pressing piece 16.Inner bearing pressing piece 16 is positioned at the inner side of outer bearing pressing piece 15.Outer bearing pressing piece 15 and inner bearing pressing piece 16 are pressed towards base portion 2 sides from top by bearing 4.Inner bearing pressing piece 16 utilizes a plurality of screws (not shown) to be fixed on rotating shaft 3.Outer bearing pressing piece 15 utilizes a plurality of screws (not shown) to be fixed on base portion 2.Containment member 17,18 upper and lower surfaces at outer bearing pressing piece 15 are inserted between the circle-shaped lower surface channels of turntable 10 and the circle-shaped upper surface groove of base portion 2.Blank part 2A is located at central interior and the upper opening of base portion 2.Gear wheel 5 is located in blank part 2A.Gear wheel 5 make its axis towards above-below direction chimeric with the bottom of rotating shaft 3, and utilize a plurality of bolts (not shown) to be fixed on rotating shaft 3.Bolt inserts from the upper surface of turntable 10.Therefore, gear wheel 5 rotates integratedly with rotating shaft 3 and turntable 10.
As shown in Figure 2, turntable motor 96 is disposed at the outside of base portion 2.Turntable motor 96 is servo motors, via decelerator 97, drives driving shaft 8 rotations.Driving shaft 8 flatly runs through base portion 2, and its leading section is positioned at blank part 2A.Driving shaft 8 is provided with gear 9 at its leading section.Gear 9 and tooth portion (not shown) engagement that is formed at gear wheel 5 bottoms.Therefore,, when turntable motor 96 drives, via driving shaft 8, gear wheel 5 and rotating shaft 3, make turntable 10 rotations.Turntable 10 is located in base portion 2.Turntable 10 thereon surface is provided with groove 12,13.Machined object directly or while being indirectly fixed on turntable 10 by fixture, is being utilized to groove 12,13.As shown in Figure 3, turntable 10 is provided with lower cover 14 at its lower surface.Lower cover 14 will cover compared with base portion 2 part in the outer part in the lower surface of turntable 10.
With reference to Fig. 2, Fig. 4, the detent mechanism of turntable 10 is described.Rotation table device 1 can be positioned respectively primary importance and the second place by turntable 10.Base portion 2 is respectively equipped with the first butt sheet 21A and the second butt sheet 21B at its lateral surface.The first butt sheet 21A and the second butt sheet 21B overlook in the form of a substantially rectangular, and they clip the pivot of turntable 10 and by screw etc., are fixed on identical radial location across predetermined angular θ 1 (such as θ 1=90 degree).Turntable 10 is respectively equipped with the first align member 22A and the second align member 22B in its lower face side.When turntable 10 counterclockwise (arrow (+) direction of Fig. 2) rotates, the first align member 22A and the first butt sheet 21A butt (with reference to Fig. 5, Fig. 6), thus turntable 10 is positioned to primary importance.When turntable 10 clockwise (arrow (-) direction of Fig. 2) rotates, the second align member 22B and the second butt sheet 21B butt, thus turntable 10 is positioned to the second place.In the present embodiment, make turntable 10 clockwise and be rotated counterclockwise 180 degree.
With reference to Fig. 4～Fig. 6, fixed mechanism 19 is described.Fixed mechanism 19 is fixed on a position in 0 degree position and 180 degree positions by turntable 10.Fixed mechanism 19 comprises the first fixed component 33A, the second fixed component 33B, supporting member 36, back shaft 37, fixedly arm 38, support 40, cam follower 34, cylinder 35 etc.The first fixed component 33A and the second fixed component 33B the lower surface of turntable 10 be individually fixed in across the pivot of rotating shaft 3 (with reference to Fig. 3) and in diametric(al) relative position roughly.
As shown in Figure 5, supporting member 36 is located at the lateral surface of base portion 2.Back shaft 37 is located at supporting member 36.Tabular fixedly arm 38 can be with respect to back shaft 37 rotations.Fixedly arm 38 supports to cam follower 34 axles can horizontally rotate at its leading section.Support 40 is arranged to outstanding towards side at the lateral surface of base portion 2.Cylinder 35 is to be straight-line tubular equipment by compressed-air actuated power conversion.The cardinal extremity utilization pin 41 (with reference to Fig. 6) of cylinder 35 is installed on support 40 in the mode that can horizontally rotate.Cylinder 35 has the piston rod 35A of the action of advancing and retreat.The front end utilization pin 42 (with reference to Fig. 5) of piston rod 35A is connected with fixing arm 38 in the mode that can rotate.
With reference to Fig. 2, Fig. 5, Fig. 6, the action of fixed mechanism 19 is described.When the piston rod 35A of cylinder 35 retreats, fixedly arm 38 rotates towards the arrow D direction of Fig. 6, and cam follower 34 approaches the lateral surface of base portion 2.The situation of successively turntable 10 being rotated towards positive direction (arrow (+) direction) below, and the situation of rotating towards negative direction (arrow (-) direction) describe.Positive direction is that negative direction is clockwise counterclockwise.In addition, before turntable 10 rotations, the piston rod 35A of cylinder 35 is retreated.
Below the situation towards positive direction rotation is described.Fig. 2 represents towards the postrotational state of positive direction.The first align member 22A is from direction of rotation upstream side and the first butt sheet 21A butt (state of Fig. 2, Fig. 5, Fig. 6).As shown in Figure 6, the first fixed component 33A side away from base portion 2 lateral surfaces in the side of cam follower 34 is mobile towards downstream direction (arrow (+) direction) from direction of rotation upstream side, and the approaching position, side in direction of rotation downstream stops in the side with cam follower 34.Under above-mentioned state, the piston rod 35A of cylinder 35 advances.Fixedly arm 38 (arrow C direction in Fig. 6) rotation counterclockwise in Fig. 5, Fig. 6, the bearing surface of the inclination of 34 couples of the first fixed component 33A of cam follower is pressed.Cylinder 35 is in running order.Therefore, cam follower 34 bearing surface of the first fixed component 33A of nipping because pressing force increases.Although turntable 10 is wanted to be rotated counterclockwise, due to the first align member 22A and the first butt sheet 21A butt, therefore, it is large that butt power becomes.Under both effects, turntable 10 is firmly fixed at the primary importance of 0 degree.
Below the situation towards negative direction rotation is described.In Fig. 2, turntable 10 rotates towards negative direction (arrow (-) direction of Fig. 2 and Fig. 6).The second align member 22B is from rotation upstream side and the second butt sheet 21B butt.As shown in Figure 6, the second fixed component 33B side away from base portion 2 lateral surfaces in the side of cam follower 34 is mobile towards downstream direction (arrow (-) direction) from direction of rotation upstream side, and the approaching position, side in direction of rotation downstream stops in the side with cam follower 34.Under above-mentioned state, the piston rod 35A of cylinder 35 advances.Fixedly arm 38 (arrow C direction) rotation counterclockwise in Fig. 6, the bearing surface of the inclination of 34 couples of the second fixed component 33B of cam follower is pressed.Cylinder 35 is in running order.Therefore, cam follower 34 bearing surface of the second fixed component 33B of nipping because pressing force increases.Although turntable 10 is wanted to turn clockwise, due to the second align member 22B and the second butt sheet 21B butt, therefore, it is large that butt power becomes.Under both effects, turntable 10 is firmly fixed at the second place of-180 degree.
With reference to Fig. 7, the electrical structure of numerical control device 70 is described.Numerical control device 70 comprises CPU71, ROM72, RAM73, Nonvolatile memory devices 74, input and output portion 75, drive circuit 81～86 etc.CPU71 controls numerical control device 70 and lathe 50 in the lump.ROM72 also stores reference position and regulates program and departure confirmation program etc. except main program.Reference position adjusting program is to carry out reference position described later to regulate the program of processing (with reference to Fig. 9).Departure confirmation program is that implementation deviation amount confirms to process the program of (with reference to Figure 10).RAM73 stores the various data of carrying out in various processing procedures temporarily.Nonvolatile memory devices 74 stores a plurality of NC programs etc.NC program is by a plurality of module compositions that comprise various control instructions, and the axle that each module comprises lathe 50 moves, the instruction of replacing instrument etc.NC program is inputted by input unit 77 by operator and by typing.Drive circuit 81 is connected with encoder 101 with Z axis motor 91.Drive circuit 82 is connected with encoder 102 with Spindle Motor 92.Drive circuit 83 is connected with encoder 103 with X-axis motor 93.Drive circuit 84 is connected with encoder 104 with Y-axis motor 94.Drive circuit 85 is connected with encoder 105 with Ku Mada 95.Drive circuit 86 is connected with encoder 106 with turntable motor 96.Drive circuit 81～86 receives instruction from CPU71, and drive current is outputed to respectively to each corresponding motor 91～96.Drive circuit 81～86, from encoder 101～106 receiving feedback signals, carries out the FEEDBACK CONTROL of position and speed.Feedback signal is pulse signal.Input and output portion 75 is connected with display unit 78 with input unit 77 respectively.
User can utilize input unit 77 from a plurality of NC programs, to select a NC program.CPU71 by the NC program display choosing in display unit 78.CPU71 controls the action of lathe 50 according to the NC program that is shown in display unit 78.
With reference to Fig. 8 to describing for turntable 10 being positioned to the target location of each position.For turntable 10 is positioned to primary importance, CPU71 outputs to drive circuit 86 by primary importance control instruction.Primary importance control instruction is turntable 10 to be positioned to the instruction of first object position.First object position is for example the position towards 1 ° of positive direction skew than 0 ° of position.First object position is so long as the position being offset towards positive direction than 0 ° of position can be also 1 ° of above position of skew.For turntable 10 is positioned to the second place, CPU71 outputs to drive circuit 86 by second place control instruction.Second place control instruction is turntable 10 to be positioned to the instruction of the second target location.The second target location is for example the position towards-1 ° of negative direction skew than-180 ° of positions.The second target location is so long as the position being offset towards negative direction than-180 ° of positions can be also-1 ° of above position of skew.The side-play amount of first object position and the second target location is preferably identical.When turntable 10 rotates towards positive direction ((+) direction of Fig. 8), at primary importance place, the first align member 22A and the first butt sheet 21A butt.Turntable 10 wants to rotate to i.e. 1 ° of position, first object position.Therefore, the first align member 22A can with the first butt sheet 21A butt reliably.According to primary importance control instruction, under the state of the first align member 22A and the first butt sheet 21A butt, turntable motor 96 wants to make turntable 10 to rotate to first object position, so the current instruction value of turntable motor 96 rises.Numerical control device 70, by the rising of the current instruction value of turntable motor 96 being detected, can confirm that turntable 10 has navigated to primary importance.When turntable 10 rotates towards negative direction ((-) direction of Fig. 8), at second place place, the second align member 22B and the second butt sheet 21B butt.Turntable 10 wants to rotate to i.e.-181 ° of positions, the second target location.Therefore, the second align member 22B can with the second butt sheet 21B butt reliably.According to second place control instruction, under the state of the second align member 22B and the second butt sheet 21B butt, turntable motor 96 wants to make turntable 10 to rotate to the second target location, so the current instruction value of turntable motor 96 rises.Numerical control device 70, by the rising of the current instruction value of turntable motor 96 being detected, can confirm that turntable 10 has navigated to the second place.
With reference to Fig. 8, the departure of position is described.Scope between primary importance and the second place is the movable range of turntable 10.Difference between primary importance and first object position is the first departure.Difference between the second place and the second target location is the second departure.The first departure and the second departure are sometimes because turntable motor 96 and decelerator 97 loosening etc. produces uneven.In the present embodiment, in order to make the first departure and the second departure impartial, CPU71 carries out reference position described later and regulates processing (with reference to Fig. 9) and departure to confirm to process (with reference to Figure 10).
With reference to Fig. 8, Fig. 9, reference position is regulated to process describe.Reference position regulates and processes is for the first departure of turntable 10 and the second departure are adjusted to impartial processing.Operator, when numerical control device 70 starts, operates to select the reference position regulatory function of rotation table device 1 to input unit 77.CPU71 calls reference position adjusting program from ROM72 and carries out this processing.Label T shown in Fig. 8 represents the position of turntable 10.As shown in the first operation of Fig. 8, CPU71 output primary importance control instruction, makes turntable 10 towards positive direction rotation (S1).Turntable 10 wants to rotate to first object position.The first align member 22A and the first butt sheet 21A butt, the current instruction value of turntable motor 96 rises.CPU71 judges whether current instruction value reaches a reference value above (S2).A reference value is pre-stored within Nonvolatile memory devices 74.When CPU71 is judged as current instruction value and does not reach a reference value (S2: no), not and the first butt sheet 21A butt, turntable 10 does not arrive primary importance to the first align member 22A.Therefore, CPU71 turns back to S2 reprocessing, until more than current instruction value reaches a reference value.When CPU71 is judged as current instruction value, reach a reference value when above (S2: be), the first align member 22A and the first butt sheet 21A be butt reliably, and turntable 10 arrives primary importances.CPU71 is temporarily defined as reference position (S3) by the current location of turntable 10 (being called physical location).Reference position is 0 ° of position.As shown in the second operation of Fig. 8, CPU71 output second place control instruction, makes turntable 10 towards negative direction rotation (S4).Turntable 10 wants to rotate to the second target location.The second align member 22B and the second butt sheet 21B butt, the current instruction value of turntable motor 96 rises.CPU71 judges whether current instruction value reaches a reference value above (S5).When CPU71 is judged as current instruction value and does not reach a reference value (S5: no), the second align member 22B is not and the second butt sheet 21B butt.Therefore, turntable 10 does not arrive the second place.CPU71 turns back to S5 reprocessing, until more than current instruction value reaches a reference value.When CPU71 is judged as current instruction value, reach a reference value when above (S5: be), the second align member 22B and the second butt sheet 21B be butt reliably.Turntable 10 arrives the second place.CPU71 is stored in RAM73 (S6) by the first pulse value of encoder 106 outputs.The first pulse value is corresponding to the position of the corresponding turntable motor 96 of physical location of the turntable 10 of the arrival second place.Present embodiment is assumed to, and supposes that 1 ° is equivalent to 10 pulses, and the first pulse value is the situation of 1810 pulses.
As shown in the 3rd operation of Fig. 8, CPU71 exports primary importance control instruction again, makes turntable 10 towards positive direction rotation (S7).Turntable 10 wants to rotate to first object position.The first align member 22A and the first butt sheet 21A butt, the current instruction value of turntable motor 96 rises.CPU71 judges whether current instruction value reaches a reference value above (S8).When CPU71 is judged as current instruction value and does not reach a reference value (S8: no), the first align member 22A is not and the first butt sheet 21A butt.Therefore, turntable 10 does not arrive primary importance.CPU71 turns back to S8 reprocessing, until more than current instruction value reaches a reference value.When CPU71 is judged as current instruction value, reach a reference value when above (S8: be), the first align member 22A and the first butt sheet 21A be butt reliably, and turntable 10 arrives primary importances.Encoder 106 output the second pulse values.The second pulse value is corresponding to the position of the corresponding turntable motor 96 of physical location of the turntable 10 of arrival primary importance.CPU71 receives the second pulse value, and is stored in (S9) in RAM73.Present embodiment is assumed to the situation that the second pulse value is 0 pulse.CPU71 calculates actual measured amount (S10).Actual measured amount is the first pulse value of storing in RAM73 and the difference of the second pulse value, the value obtaining to be angular metric that turntable 10 reality are rotated to primary importance from the second place convert with the pulse value of encoder 106.Originally, the angular metric that turntable 10 rotates to primary importance from the second place is 180 °.Therefore, datum quantity is 1800 pulses.CPU71 calculates the difference component (S11) between actual measured amount and datum quantity.In the present embodiment, because actual measured amount is 1810-0=1810 pulse, datum quantity=1800 pulse, therefore, difference component is 10 pulses.In order to make the first departure and the second departure impartial, rotation table device 1 need to be adjusted to central authorities with respect to the movable range of turntable 10 by the rotation control range of turntable 10.Rotation control range is to control the scope of the rotation of turntable 10.The rotation control range of turntable 10 is towards the positive direction skew angle suitable with difference component.
As shown in the 4th operation of Fig. 8, it is that equal equivalent changes reference position (S12) towards 1/2nd of negative direction offset deviation component that CPU71 makes temporary transient definite reference position in S3.Due in the present embodiment, difference component is 10 pulses, therefore, towards the angular metric of 5 pulses that obtain after negative direction skew is divided into two 10 pulses equably 0.5 ° change reference position.Therefore, the rotation control range of turntable 10 is positioned at the central authorities of movable range.Rotation table device 1 can regulate the first departure and the second departure equably.CPU71 exports warning tones (S13), and the position adjustments of notice turntable 10 completes, then finishes this processing.
With reference to Figure 10, departure is confirmed to process describing.It is to confirm the first departure and the whether impartial processing of the second departure that departure is confirmed to process.Operator operates to select the position adjustment function of rotation table device 1 to input unit 77.CPU71 calls departure confirmation program from ROM72 and carries out this processing.Operator selects this function after being preferably in and having carried out the processing of said reference position adjustments.CPU71 makes to try the count value R zero clearing that counter counts again and initializes (S20).The execution number of times that tentative counter is processed (S33) to reference position described later change is again counted.The count value R of tentative counter is stored in RAM73 again.CPU71 judges whether turntable 10 has completed location (S21).CPU71 utilizes encoder 106 to detect the current location of turntable 10, judges that it is positioned at primary importance or the second place.When the location of turntable 10 does not complete (S21: no), CPU71 positions (S22) to the machining area apart from lathe 50 nearer workbench P1 or P2.When workbench P1 is positioned, CPU71 makes turntable 10 rotate and be located at primary importance towards positive direction.When workbench P2 is positioned, CPU71 makes turntable 10 rotate and be located at the second place towards negative direction.When turntable 10 has been positioned in primary importance or the second place (S21: be), CPU71 makes to process and advances to S23.For example, turntable 10 is being positioned under the state in the second place, it is positive direction rotation in the opposite direction that CPU71 makes turntable 10, thereby is located at (S23) in primary importance.CPU71 calculates departure H1, and is stored in (S24) in RAM73.CPU71 utilizes encoder 106 to detect the current physical location of turntable motor 96, thus calculate and first object position between difference be departure H1.It is negative direction rotation in the opposite direction that CPU71 makes turntable 10, and is located at (S25) in the second place.CPU71 calculates departure H2 (S26), and calculates the difference (S27) between departure H1 and departure H2.Whether the difference that CPU71 judgement calculates is than a reference value little (S28).A reference value is that it is stored in Nonvolatile memory devices 74 for the whether impartial value of judgment bias amount H1 and departure H2.When the difference calculating is less than a reference value (S28: be), because the position adjustments of turntable 10 normally completes, therefore, CPU71 demonstrates and has regulated information (S29) in display unit 78, then finishes this processing.As the difference calculating (S28: no) when a reference value is above, whether the CPU71 judgement again count value R of tentative counter has reached setting above (S31).Setting is the number of times that allows the reference position change processing of S33 described later, and it is stored in Nonvolatile memory devices 74.Present embodiment is set as 2 by setting.When being judged as count value R and being less than setting (S31: no), CPU71 carries out reference position change and processes (S33).It is the equal equivalent obtaining after reference position skew is divided into two difference component that reference position change is processed, and changes the processing of reference position.Difference component is from departure H2, to deduct the value after departure H1.CPU71 makes count value R add 1 (S34), then turns back to S23, again calculates departure H1 and departure H2 (S23～S27), and judges whether difference component is less than a reference value (S28).When being judged as count value R, reach setting when above (S31: be), in no matter, carry out the change of how many times reference position and process the state that also can not make departure H1 and departure H2 equalization.May there are other faults in rotation table device 1.Therefore, CPU71 is shown in display unit 78 (S32) by error message, and finishes this processing.Operator, by confirming error message, can promptly tackle the fault of rotation table device 1.
In the above description, the CPU71 that the S1 of execution graph 9～S3 processes is equivalent to temporary transient determination portion of the present invention.The CPU71 that carries out S4, S5 processing is equivalent to the first location division of the present invention.The CPU71 that carries out S6 processing is equivalent to primary importance storage part of the present invention.The CPU71 that carries out S7～S8 processing is equivalent to the second location division of the present invention.The CPU71 that carries out S9 processing is equivalent to second place storage part of the present invention.The CPU71 that carries out S10, S11 processing is equivalent to difference component calculating part of the present invention.The CPU71 that carries out S12 processing is equivalent to changing unit of the present invention.The CPU71 that carries out the S33 processing shown in Figure 10 is equivalent to reference position of the present invention changing unit.Carry out each CPU71 processing of S33, S23～S28 and be equivalent to enforcement division more of the present invention.
As described above, 70 pairs of rotation table devices 1 of numerical control device of present embodiment are controlled.Rotation table device 1 comprises turntable 10, turntable motor 96, a pair of butt sheet 21A, 21B, a pair of align member 22A, 22B.Turntable 10 can be supported in base portion 2 at 0 degree to being rotated in the forward and counter-rotating between 180 degree around an axis, and machined object is kept.Turntable motor 96 drives turntable 10.A pair of butt sheet 21A, 21B are located at base portion 2.A pair of align member 22A, 22B are located at turntable 10, with each butt sheet 21A, 21B butt, thereby turntable 10 are positioned at corresponding to the primary importance of 0 degree with corresponding to the second place of 180 degree.
The CPU71 of numerical control device 70 carries out reference position and regulates processing.CPU71 drives turntable motor 96 that turntable 10 is rotated towards positive direction.The first align member 22A and the first butt sheet 21A butt.CPU71 is positioned turntable 10 for primary importance, and the position of turntable 10 is temporarily defined as to reference position.CPU71 drives turntable motor 96 that turntable 10 is rotated towards negative direction.The second align member 22B and the second butt sheet 21B butt.CPU71 is positioned turntable 10 for the second place, and the first pulse value of storage coder 106.CPU71 drives turntable motor 96, and again turntable 10 is positioned to primary importance.The second pulse value of CPU71 storage coder 106 outputs.CPU71 calculates the difference component between actual measured amount and datum quantity.Actual measured amount is the difference between the first pulse value and the second pulse value.Datum quantity is the pulse value that is equivalent to 180 degree.The equal equivalent that CPU71 obtains after reference position skew is divided into two the difference component calculating, changes reference position.The rotation control range of turntable 10 is positioned at the central authorities of movable range.Therefore, rotation table device 1 can the first departure and the second departure when being positioned primary importance and the second place be adjusted to equalization.
In the present embodiment, further, CPU71 outputs to drive circuit 86 by the first control instruction.The first control instruction is that indication is towards the instruction of location, first object position.First object position is corresponding to primary importance.CPU71 calculates the first departure when turntable 10 is positioned to primary importance.The first departure is the physical location of turntable 10 and the difference between first object position.CPU71 outputs to drive circuit 86 by the second control instruction.The second control instruction is that indication is towards the instruction of the second location, target location.The second target location is corresponding to the second place.CPU71 calculates the second departure when turntable 10 is positioned to the second place.The second departure is the physical location of turntable 10 and the difference between the second target location.CPU71 judges that difference component between the first departure and the second departure is whether more than a reference value.At difference component in the situation that a reference value is above, the equal equivalent that CPU71 obtains after reference position skew is divided into two difference component, and again calculate the first departure and the second departure, then judge that difference component between the first departure and the second departure is whether more than a reference value.CPU71 repeats above-mentioned processing, until difference component is less than a reference value.Therefore, numerical control device 70 can be adjusted to equalization by the first departure and the second departure.
In the present embodiment, further, when carrying out reference position change and process the number of times of (S33), reaching stipulated number when above, may there is certain fault in rotation table device 1.CPU71 is shown in display unit 78 by error message and notifies extremely.Therefore, operator can promptly tackle the abnormal of rotation table device 1.
In the present embodiment, further, first object position is the position towards positive direction skew than primary importance, and the second target location is the position towards negative direction skew than the second place.Therefore, numerical control device can make the first align member 22A and the first butt sheet 21A butt reliably, and makes the second align member 22B and the second butt sheet 21B butt.
In addition, the present invention is not limited to above-mentioned embodiment, can carry out various distortion.In above-mentioned embodiment, in the reference position shown in Fig. 9, regulate in processing, start most to make turntable 10 to rotate towards positive direction, make it be positioned primary importance and temporarily determine reference position (S1～S3), but also can make turntable 10 towards negative direction rotation, make it be positioned the second place and temporarily determine reference position.Now, CPU71 is as long as store the first pulse value and the second pulse value according to the order of primary importance, the second place.
In present embodiment, in the departure shown in Figure 10 is confirmed to process, the execution number of times that CPU71 is used tentative counter to process the reference position change of S33 is again counted, at count value R, reach setting when above, show error message, but also can not use again tentative counter, but reach a reference value when above in the difference of departure, error message is shown in to display unit 78.
In the present embodiment, the situations that are made as-180 degree positions to primary importance being made as to 0 degree position, the second place are illustrated, but also can make positive direction and negative direction reverse.Now, the second place becomes 180 degree positions.
Claims (5)
1. a numerical control device (70), it is controlled rotation table device (1), described rotation table device (1) comprising: turntable (10), this turntable can be supported in base portion (2) at 0 degree to being rotated in the forward and counter-rotating between 180 degree around an axis, and machined object is kept; Motor (96), this motor drives described turntable; A pair of abutting part (21A, 21B), this pair of abutting part is located at described base portion; And a pair of location division (22A, 22B), described turntable is located in this pair of location division, with any butt in described a pair of abutting part, thereby described turntable is positioned respectively to the primary importance corresponding with 0 degree and the second place corresponding with 180 degree,
Described numerical control device is characterised in that, comprising:
Temporary transient determination portion (71), this temporary transient determination portion drives described motor, make described turntable towards a direction rotation, thereby make a location division in described a pair of location division and an abutting part butt in described a pair of abutting part, described turntable is positioned to described primary importance, and the position of described turntable is temporarily defined as to reference position;
The first location division (71), after described temporary transient determination portion is positioned the position of described turntable for described primary importance, this first location division drives described motor, make described turntable towards the rightabout rotation of a described direction, and make be different from another location division of a described location division and be different from another abutting part butt of a described abutting part, thereby described turntable is positioned to the described second place;
Primary importance storage part (71), store the position of described motor when this primary importance storage part is positioned described turntable for the described second place to described the first location division;
The second location division (71), this second location division drives described motor, makes described turntable towards a described direction rotation, thereby makes a described location division and a described abutting part butt, and described turntable is positioned to described primary importance;
Second place storage part (71), store the position of described motor when this second place storage part is positioned described turntable for described primary importance to described the second location division;
Difference component calculating part (71), the actual measured amount between the described position that the described position that this difference component calculating part is stored described primary importance storage part and described second place storage part are stored and the difference component being equivalent between the datum quantity of 180 degree calculate; And
Changing unit (71), the equal equivalent obtaining after the described difference component that this changing unit makes the skew of described reference position that described difference component calculating part is calculated is divided into two, changes described reference position.
2. numerical control device as claimed in claim 1, is characterized in that, comprising:
The first departure calculating part (71), the first control instruction according to indication towards the location, first object position corresponding to described primary importance, drive described motor, make described turntable towards a described direction rotation, make a described location division and a described abutting part butt, thereby described turntable is positioned to described primary importance, and described the first departure calculating part is to now physical location and the difference between described first object position of described turntable are that the first departure is calculated;
The second departure calculating part (71), the second control instruction according to indication towards the second location, target location corresponding to the described second place, drive described motor, described turntable is rotated towards described rightabout, make described another location division and described another abutting part butt, thereby described turntable is positioned to the described second place, described the second departure calculating part to the physical location of described turntable now and the difference between described the second target location the second departure calculate;
Difference judging part (71), whether the difference component between described the second departure that described the first departure that this difference judging part calculates described the first departure calculating part and described the second departure calculating part calculate judges above in setting;
Reference position changing unit (71), the equal equivalent obtaining after the described difference component that this reference position changing unit makes the skew of described reference position that described difference judging part is judged is divided into two, changes described reference position; And
Enforcement division (71) again, when described difference judging part is judged as described difference component when described setting is above, this again enforcement division utilize described reference position changing unit to make the skew of described reference position, and again carry out described the first departure calculating part, described the second departure calculating part, described difference judging part each process.
3. numerical control device as claimed in claim 2, is characterized in that, comprising:
Count section (71), this count section is carried out the described number of times that each is processed to described enforcement division again and is counted;
Number of times judging part (71), this number of times judging part judges that the count value of described count section is whether more than stipulated number; And
Notification unit (71), is judged as described count value when described stipulated number is above at described number of times judging part, and this notification unit notice occurs abnormal.
4. numerical control device as claimed any one in claims 1 to 3, is characterized in that,
Described first object position is the position towards described direction skew than described primary importance,
Described the second target location is the position towards described rightabout skew than the described second place.
5. a revolving table position control method, it is the revolving table position control method that numerical control device that rotation table device is controlled carries out, described rotation table device comprises: turntable, this turntable can be supported in base portion at 0 degree to being rotated in the forward and counter-rotating between 180 degree around an axis, and machined object is kept; Motor, this motor drives described turntable; A pair of abutting part, this pair of abutting part is located at described base portion; A pair of location division, described turntable is located in this pair of location division, with any butt in described a pair of abutting part, thereby described turntable is positioned respectively to the primary importance corresponding with 0 degree and the second place corresponding with 180 degree,
Described revolving table position control method is characterised in that, comprising:
Temporary transient definite operation, this temporarily determines in operation, drive described motor, make described turntable towards a direction rotation, thereby make a location division in described a pair of location division and an abutting part butt in described a pair of abutting part, described turntable is positioned to described primary importance, and the position of described turntable is temporarily defined as to reference position;
The first positioning process, after the position of described turntable being positioned to described primary importance in described temporary transient definite operation, in this first positioning process, drive described motor, make described turntable towards the rightabout rotation of a described direction, and make be different from another location division of a described location division and be different from another abutting part butt of a described abutting part, thereby described turntable is positioned to the described second place;
Primary importance storage operation, in this primary importance storage operation, store the position of the described motor when described turntable being positioned to the described second place in described the first positioning process;
The second positioning process, in this second positioning process, drives described motor, makes described turntable towards a described direction rotation, thereby makes a described location division and a described abutting part butt, and described turntable is positioned to described primary importance;
Second place storage operation, in this second place storage operation, store the position of the described motor when described turntable being positioned to described primary importance in described the second positioning process;
Difference component calculation process, in this difference component calculation process, the described position of storing in described primary importance storage operation and the difference component of storing the actual measured amount between the described position of storing in operation in the described second place and be equivalent between the datum quantity of 180 degree are calculated; And
Change operation, in this change operation, the equal equivalent obtaining after the skew of described reference position is divided into two the described difference component calculating in described difference component calculation process, changes described reference position.
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| JP2012211995A JP5942741B2 (en) | 2012-09-26 | 2012-09-26 | Numerical control device and rotary table position adjusting method |
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Also Published As
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| JP5942741B2 (en) | 2016-06-29 |
| JP2014067220A (en) | 2014-04-17 |
| CN103659297B (en) | 2016-05-11 |
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