CN1644313A - Tool transporting device and method for determining speed of its action - Google Patents
Tool transporting device and method for determining speed of its action Download PDFInfo
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- CN1644313A CN1644313A CN 200510005926 CN200510005926A CN1644313A CN 1644313 A CN1644313 A CN 1644313A CN 200510005926 CN200510005926 CN 200510005926 CN 200510005926 A CN200510005926 A CN 200510005926A CN 1644313 A CN1644313 A CN 1644313A
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- centrifugal force
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Abstract
The invention provides a tool carrying device which keeps carrying tool maintaining part in which tools are used by tools to fixedly located carrying part by revolving motion. The tool carrying device is characterize in that the tool carry device is provided with a centrifugal force estimated device which estimates the centrifugal force of the tools carried by the carrying part and a speed determined device which determines the revolving speed of the carrying part on the basis of the estimated centrifugal force by the centrifugal force estimated device.
Description
Technical field
The present invention relates to have and be used for determining method by instrument carrying device and this instrument operation of conveying equipment speed of the conveying unit of the employed instrument of lathe by the conveyance that rotatablely moves.
Background technology
On Japanese patent laid-open 3-60941 communique, relevant by the conveyance that rotatablely moves by the device of the employed instrument of lathe, the weight square that has disclosed corresponding to instrument makes its conveyance speed that the technology that suitably changes take place.
But, though because the cause that the weight square exerts an influence to acceleration if determine conveyance speed according to the weight square, even have appropriate property to a certain extent, also may not obtain optimal conveyance speed.
Summary of the invention
The present invention makes in view of above-mentioned condition, its purpose is, provides to determine method according to instrument carrying device and this instrument operation of conveying equipment speed that the active force that instrument is produced because of rotatablely moving is suitably set the rotary speed when rotatablely moving the conveyance instrument.
Instrument carrying device of the present invention has: it is characterized in that having keeping by the instrument maintaining part conveyance of the employed instrument of the lathe conveying unit to assigned position by rotatablely moving:
To act on the centrifugal force estimating device of inferring by the centrifugal force on the instrument of above-mentioned conveying unit conveyance,
And determine that according to the centrifugal force of inferring by this centrifugal force estimating device the speed of the rotary speed of above-mentioned conveying unit determines device.
That is,, can determine that the instrument maximum with definite quality can be rotated with much speed from physics if stipulated to act on the size of the centrifugal force on the instrument.Thereby, can be according to the quality of instrument, more in the past than the rotary speed of determining more suitably to move.
At this moment, above-mentioned centrifugal force estimating device can be constituted long-pending according to the quality of instrument and the revolution radius to this instrument center of gravity, centrifugal force is inferred from the above-mentioned pivot that rotatablely moves.That is, the centrifugal force of supposing the instrument that acts on is that the quality of F, instrument is that m, center of gravity revolution radius are that r, rotary speed (angular speed) are ω, and then relation is therebetween determined by following formula.
F=m·r·ω
2
Thereby, by calculating m * r,, can make suitable inferring to the centrifugal force that acts on this instrument in the occasion that makes instrument with the predetermined rotational speed rotation.
In addition, also, above-mentioned conveying unit has the rotary activated tool conveying storehouse that is positioned at from several instrument maintaining parts of the equidistant position of pivot applicable to being constituted, adopt so to constitute, carry the high rotation speed in storehouse by suitably determining instrument, can the required time of shortening instrument transposing.
In addition, also above-mentioned conveying unit can be constituted to be rotated and carry in several instruments in storehouse any to replace and be arranged at above-mentioned instrument with the instrument that will remain in to carry instrument exchange apparatus between storehouse and the above-mentioned main shaft at the leading section of the main shaft of lathe, adopt so and constitute, by suitably determining the high rotation speed of instrument exchange apparatus, can the required time of shortening instrument transposing.
Description of drawings
Fig. 1 represents that the present invention is applicable to the embodiment 1 when having turntable type instrument carries the instrument exchange apparatus of storehouse formation, for the host CPU of expression numerical control device carries the rotary speed in storehouse to carry out the flow chart of the flow process of computing to instrument.
Fig. 2 (a) is that representational tool carries the figure of the downside in storehouse, and Fig. 2 (b) is the figure of the instrument consistent with vertical of the interior direction of principal axis in the presentation graphs 2 (a) only, and Fig. 2 (c) is the enlarged drawing of the instrument of Fig. 2 (b).
Fig. 3 (a) carries the stereogram of storehouse with the STA representation of taking-up for packing in the instrument of instrument exchange apparatus.Fig. 3 (b) carries the side view in storehouse for instrument.
Fig. 4 is the figure of the leading section of expression jig arm.
Fig. 5 is the functional-block diagram of the electric formation of expression numerical control device.
Fig. 6 represents that the present invention is applicable to the embodiment 2 when the chain type instrument is carried the storehouse, is the pie graph in the storehouse of representational tool conveying roughly.
The specific embodiment
[embodiment 1]
Below, referring to figs. 1 through Fig. 5, the embodiment 1 when the present invention is applicable to that having turntable type instrument carries the instrument exchange apparatus in storehouse describes.The structure of the instrument exchange apparatus in the present embodiment, for example with the special fair 7-80109 communique of Japan Patent in disclose identical, below only major part of the present invention is described.
Fig. 3 (a) carries storehouse (conveying unit 1) to take out the stereogram of STA representation for the instrument that will pack in the instrument exchange apparatus.Instrument is carried storehouse 1 roughly several jig arm 3 to be installed radially on the peripheral part by discoidal conveying storehouse base portion 2 to constitute.As shown in Figure 4, on the leading section of jig arm 3, be formed with the maintaining part (instrument maintaining part) 5 of U font, be used to be clamped in the upper end side that lower end side is installed with the tool holder 4 of instrument.In the inboard leading section both sides of maintaining part 5, with by built-in helical spring (not illustrating) to the state of the application of force to the inside fulcrum post 6,6 is installed.And fulcrum post 6,6 is located at the groove (not illustrating) on the tool holder 4 and this tool holder 4 is kept by himself is inserted.
And, carry storehouse base portion 2 to carry the rotating shaft of storehouse motor 27 (with reference to Fig. 5) to be connected and obtain to rotate and drive with its center and instrument.Shown in Fig. 3 (b), the relative horizontal plane of its rotating shaft is to oblique 18 degree of elevation angle inclination.In addition, in the following description, instrument and tool holder are considered as in fact becoming one, so these members are called instrument 4.
The functional-block diagram that Fig. 5 is represented for the electric formation of the lathe that comprises the instrument exchange apparatus being carried out the numerical control device (centrifugal force estimating device, speed are determined device) 10 of Numerical Control.Numerical control device 10 is that the center constitutes to be responsible for all host CPUs 11 of control and to be responsible for the attached CPU12 that workpiece is processed or instrument is changed.
Between host CPU 11 and attached CPU12, connecting C (common) RAM18 by bus (bus).CRAM18 is by writing or with reference to from host CPU 11 and attached CPU12 both sides' information, and storage is from the instruction of host CPU 11 to attached CPU12 or its rightabout information etc.
In addition, also connecting on the host CPU 11: comprise the key of writing input procedure etc., be used to begin firing switch that a series of processing handle, be used for the switch portion 19 of the hand switch that can carry out individually that the processing of each step of procedure is confirmed etc. etc.; Keyboard 20 and being used to shows, with reference to the CRT (cathode ray tube) 21 of procedure etc.
Attached CPU12 and X-axis motor 22, y-axis motor 23 and the work stage electric rotating machine 24 of work stage rotation is connected are sent control signal with the machined surface that changes workpiece etc. to these equipment.In addition, attached CPU12 also is connected with moving (Z axle) motor 25 and spindle motor 26 up and down, sends control signal to these equipment, carries out with the fixed workpiece of 4 pairs of machined surfaces of instrument and processed position of regulation and processes.In addition, attached CPU12, the needs of corresponding processing technology carry storehouse motor 27 and instrument transposing motor 28 to send control signal, the transposing of execution instrument to instrument.These workpiece machining control of being carried out by attached CPU12, instrument transposing control are according to carrying out from the indication of host CPU 11.
11 pairs of host CPUs are read in one action step by step by procedure 14 keyboard 20 inputs, that be stored among the principal part RAM15, if the information that relevant workpiece is processed then writes CRAM18.Attached CPU12 reads this information that writes and carries out the workpiece machining control.In addition, principal part RAM15 carries the data of each instrument 4 in storehouse 1 to store to carrying the data in storehouse 1 by the relevant instrument of user's input and being arranged at this instrument.
That Fig. 1 is carried out by host CPU 11 for expression, carry the rotary speed in storehouse 1 to carry out the flow chart of the flow process of computing to instrument.In addition, this processing is arranged the processing as the part of workpiece procedure 14.Host CPU 11 at first reads the quality m of each instrument 4 that is arranged at instrument conveying storehouse 1 and the data (step S1) of tool length L by means of principal part RAM15, then, and the position of centre of gravity of computational tool 4 (step S2).The calculating to position of centre of gravity is herein undertaken by the revolution radius r of inferring center of gravity from tool length L, uses approximate formula during this is inferred.For example, the radius of the holding position of the instrument on supposing from the pivot of carrying storehouse base portion 2 to jig arm 3 is r0, then, and can be to the center of gravity revolution radius r of instrument 4 with (1) formula as being similar to.
r=r0+L/2 …(1)
Then, 11 pairs of each instruments 4 of host CPU carry out the calculating (step S3) of the occurrence condition of centrifugal force.That is, the centrifugal force of supposing the instrument that acts on is that the quality of F, instrument is that m, center of gravity revolution radius are that r, rotary speed are ω, then concerns therebetween by (2) formula and determines.
F=m·r·ω
2 …(2)
Thereby, by amassing of calculated mass m and center of gravity revolution radius r: m * r,, can make suitable inferring to the centrifugal force that acts on this instrument in the occasion that instrument is rotated with predetermined rotational speed ω.In addition, step S1~S3 is corresponding to the centrifugal force estimating device.And long-pending in each instrument: m * r is that (m * r) max judges (step S4) to the maximum.
Then, host CPU 11 carry out by principal part RAM15 read chucking power (confining force) FG of the instrument on the jig arm 3 data (step S5), carry out the calculating (step S6) of limit centrifugal force Flimit.Limit centrifugal force Flimit can calculate approx with (3) formula.
Flimit=FG/sin18° …(3)
Herein, Fig. 2 (a) representational tool is carried the lower portion in storehouse 1, and Fig. 2 (b) only represents the direction of principal axis instrument 4 consistent with vertical in these.Fig. 2 (c) does further to amplify to this instrument 4.Among Fig. 2 (c), gravity acts on the instrument 4 that remains on the jig arm 3 with vertical, and when instrument was carried storehouse 1 rotation, centrifugal action was in tilt laterally 18 ° direction of relative vertical.And, owing to be formed with the maintenance groove that makes fulcrum post 6 chimeric in the periphery of instrument 4, thereby, overcome the chucking power of jig arm 3 and make the active force of instrument 4, for acting on the component on the horizontal direction to the direction that comes off.Therefore, limit centrifugal force Flimit can be calculated by (3) formula.
And host CPU 11 calculates the high rotation speed ω max (step S7) that the instrument do not go beyond the limit of centrifugal force Flimit is carried storehouse 1 with (4) formula.
ωmax={Flimit/(m×r)max}
1/2 …(4)
That is, high rotation speed ω max can be by (square root behind the max of m * r) obtains divided by the long-pending maximum of m * r with limit centrifugal force Flimit.
After this, host CPU 11 reads the rotary speed ω limit that carries mechanism's limit in storehouse 1 as instrument from principal part RAM15, carries out the comparison (step S8) of magnitude relationship with high rotation speed ω max.And, if ω max≤ω limit (" NO "), then high rotation speed ω max is defined as the rotary speed that instrument is carried storehouse 1, write principal part RAM15 and storage (step S9).
So, when handling, the processing of the machined object that after this carries out carries out the occasion of the instrument transposing of main shaft, attached CPU12 makes instrument carry storehouse motor 27, promptly carry under the situation of storehouse base portion 2 with high rotation speed ω max rotation, and the some of instrument 4 that remains in jig arm 3 selected as the transposing object.And, owing to high rotation speed ω max sets according to limit centrifugal force Flimit, so, can prevent reliably that also the instrument 4 that remains on the jig arm 3 from coming off even carry storehouse base portion 2 with speed omega max rotation.
On the other hand, in step S8,, write principal part RAM15 and storage (step S10) if ω max>ω limit (" YES ") then is defined as the limit rotary speed ω limit rotary speed that instrument is carried storehouse 1.That is, carry base portion 2 rotations in storehouse then may cause damage to portion of mechanism if make with going beyond the limit of rotary speed ω limit, thereby, to be avoided such state of affairs.In addition, step S7~S10 determines device corresponding to speed.
As mentioned above, in the present embodiment, control tool is carried the control device 10 in storehouse 1, the centrifugal force that acts on instrument 4 is inferred, and carry the rotary speed in storehouse 1 to determine according to this centrifugal force to instrument.That is,, can determine that instrument 4 maximums with definite quality m can be rotated with great speed from physics if stipulated the size of the centrifugal force of the instrument that acts on 4.Thereby, can be according to the quality of instrument 4, more in the past than the rotary speed of determining more suitably to move.
In addition, control device 10 by the quality m of instrument 4 and center of gravity revolution radius r from the pivot that rotatablely moves to this instrument 4 long-pending carried out computing, can suitably be inferred the centrifugal force on the instrument of acting on 4.In addition, owing to control device 10 will high rotation speed ω max be defined as limit centrifugal force Flimit that the chucking power FG with the instrument on the foundation jig arm 34 sets divided by the long-pending maximum of m * r (the subduplicate value behind the max of m * r), thereby, can in the scope that instrument 4 is come off from jig arm 3, rotary speed be defined as maximum.
In addition, because control device 10 will high rotation speed ω max be defined as being lower than instrument carries storehouse 1 the textural high rotation speed ω limit that allows, thereby, can prevent from speed is set at the speed of the limit that exceeds rotating mechanism.
In addition, by applying the present invention to utilize 5 pairs of instruments of maintaining part, 4 instruments that keep, that make instrument 4 carry out the formation of conveyance rotatably to carry storehouse 1 at the front end place that is positioned at several jig arm 3 of equidistant position from the pivot of carrying storehouse base portion 2, owing to can be suitably carry the high rotation speed in storehouse 1 to set, thereby can the transposing of the shortening instrument required time, improve operating efficiency to instrument.
[embodiment 2]
The chain type instrument that the removal direction of instrument was consistent with gravity direction (vertical) when Fig. 6 represented to apply the present invention to the instrument transposing is carried 31 o'clock the embodiment in storehouse (conveying unit) 2, and roughly representational tool is carried the formation in storehouse 31.Instrument is carried storehouse 31, and the illustrated drive mechanism of not doing by being disposed at its upper end side and lower end side makes the chain ring of chain 32 rotate to vertical direction.
On chain 32, equally spaced be provided with and be fixed with several maintaining parts that are used to keep tool holder (instrument maintaining part) 33, the chain ring peripheral direction of the opening of tool holder (not illustrating) in chain 32 is installed on maintaining part 33.And, under the state when maintaining part 33 is positioned at the minimum point of chain 32, carry out the instrument transposing.When tool holder is positioned at this reversing of position, along vertical extracted from maintaining part 33, removal.
Carry storehouse 31 for the instrument of this kind formation, in step S6, carry out limit centrifugal force Flimit when calculating, calculate after in the centrifugal force that acts on tool holder because of chain 32 rotations, adding the gravity effect and just can.
[embodiment 3]
In having the instrument replacing mechanism 34 of this kind formation, similarly, when the rotary speed of turning arm 35 rose, because of action of centrifugal force, the instrument 37 that is being held can tilt laterally, thereby had that transposing causes the load of fault to consider to instrument.For this reason, determine high rotation speed that the present invention is suitable for, the gradient of the instrument 37 with turning arm 35 rotations the time is controlled in the allowed band.
As mentioned above, in embodiment 3, carry some in several instruments 37 in storehouse to be alternatively in the instrument replacing mechanism 34 of leading section of main shaft of lathe owing to apply the present invention to rely on turning arm 35 instrument that will remain in, so can be by the high rotation speed of setting means exchange apparatus suitably, come shortening instrument transposing required time, and can improve the reliability of action.
The present invention is not subjected in the qualification that above reaches each embodiment that illustrates in the accompanying drawing, can carry out following distortion or expansion.
For estimating not exist the occasion of calculating above the possibility of the high rotation speed ω max of mechanism's limit, also can omit step S8, S10, only adopt the high rotation speed ω max that calculates by step S7 all the time.
In the occasion of the centrifugal force of inferring the instrument of acting on, the radius r that also center of gravity can be revolved round the sun is set at suitable definite value, and only the quality m of each instrument is set respectively to infer.
For example, also applicable to as the special instrument that is rotated in the type of carrying out in the horizontal plane of driving the instrument that flat 10-263971 communique disclosed carry the storehouse.
Recording medium is not limited to floppy disk 41, also can adopt CD-ROM, DVD-ROM, storage card etc.
In addition, the present invention does not limit and is used in the equipment relevant with lathe, carries out the mechanism of instrument conveyance as long as have by rotatablely moving, and is all applicable.
Claims (11)
1. instrument carrying device has by rotatablely moving and it is characterized in that having keeping by the instrument maintaining part conveyance of the employed instrument of the lathe conveying unit to assigned position:
To act on the centrifugal force estimating device of inferring by the centrifugal force on the instrument of above-mentioned conveying unit conveyance,
And determine that according to the centrifugal force of inferring by this centrifugal force estimating device the speed of the rotary speed of above-mentioned conveying unit determines device.
2. instrument carrying device according to claim 1 is characterized in that, above-mentioned centrifugal force estimating device, and long-pending according to the quality of instrument and the revolution radius to this instrument center of gravity from the above-mentioned pivot that rotatablely moves inferred centrifugal force.
3. instrument carrying device according to claim 1 is characterized in that above-mentioned speed is determined device, according to the confining force of centrifugal force of being inferred by above-mentioned centrifugal force estimating device and above-mentioned instrument maintaining part maintenance instrument, determines the rotary speed of above-mentioned conveying unit.
4. instrument carrying device according to claim 2 is characterized in that above-mentioned speed is determined device, according to the confining force of centrifugal force of being inferred by above-mentioned centrifugal force estimating device and above-mentioned instrument maintaining part maintenance instrument, determines the rotary speed of above-mentioned conveying unit.
5. instrument carrying device according to claim 1 is characterized in that, above-mentioned speed determines that device is defined as textural allow below the high rotation speed of above-mentioned conveying unit with rotary speed.
6. according to each described instrument carrying device in the claim 1 to 5, it is characterized in that above-mentioned conveying unit formation has the rotary activated tool that is made of several instrument maintaining parts that are positioned at from the equidistant position of pivot and carries the storehouse.
7. instrument carrying device according to claim 6, it is characterized in that above-mentioned conveying unit constitutes to be rotated carries in several instruments in storehouse any to replace and be arranged at above-mentioned instrument at the leading section of the main shaft of lathe with the instrument that will remain in to carry instrument exchange apparatus between storehouse and the above-mentioned main shaft.
8. an instrument operation of conveying equipment speed is determined method, be used to determine to have by rotatablely moving and keep by the instrument maintaining part conveyance of the employed instrument of lathe rotary speed to the above-mentioned conveying unit of the instrument carrying device of the conveying unit of assigned position, it is characterized in that
Infer acting on by the centrifugal force on the instrument of above-mentioned conveying unit conveyance,
Determine above-mentioned rotary speed according to the centrifugal force of being inferred.
9. instrument operation of conveying equipment speed according to claim 8 is determined method, it is characterized in that, the quality of the above-mentioned instrument of foundation is long-pending with the revolution radius to this instrument center of gravity from the above-mentioned pivot that rotatablely moves, and centrifugal force is inferred.
According to Claim 8 or 9 described instrument operation of conveying equipment speed determine method, it is characterized in that, keep the confining force of instrument according to the centrifugal force of being inferred and above-mentioned instrument maintaining part, determine rotary speed.
11. instrument operation of conveying equipment speed according to claim 8 is determined method, it is characterized in that, above-mentioned rotary speed is defined as textural allow below the high rotation speed of above-mentioned conveying unit.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004011748 | 2004-01-20 | ||
JP2004011748A JP4655477B2 (en) | 2004-01-20 | 2004-01-20 | Tool conveying device, method for determining turning speed of tool conveying device, and computer program |
Publications (2)
Publication Number | Publication Date |
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CN1644313A true CN1644313A (en) | 2005-07-27 |
CN100351038C CN100351038C (en) | 2007-11-28 |
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ID=34878988
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CNB2005100059260A Active CN100351038C (en) | 2004-01-20 | 2005-01-20 | Tool transporting device and method for determining speed of its action |
Country Status (3)
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JP (1) | JP4655477B2 (en) |
CN (1) | CN100351038C (en) |
TW (1) | TWI246447B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102717288A (en) * | 2011-03-28 | 2012-10-10 | 兄弟工业株式会社 | Machine tool and cutter changing method |
CN104416400B (en) * | 2013-09-10 | 2016-11-23 | 发那科株式会社 | The cutter changing device of lathe |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5698812B2 (en) * | 2013-09-11 | 2015-04-08 | ファナック株式会社 | Tool changer for machine tools |
WO2017017824A1 (en) * | 2015-07-29 | 2017-02-02 | 株式会社牧野フライス製作所 | Tool exchange method and tool exchange device |
TWI606886B (en) * | 2016-11-15 | 2017-12-01 | 北鉅精機股份有限公司 | Intellectual system for atc tool exchanging speed moderation |
CN106514394A (en) * | 2017-01-06 | 2017-03-22 | 昆山北钜机械有限公司 | ATC tool replacing speed intellectualized system |
JP6603282B2 (en) | 2017-09-25 | 2019-11-06 | ファナック株式会社 | Machine tool and method for controlling machine tool |
JP7338976B2 (en) * | 2019-01-16 | 2023-09-05 | ファナック株式会社 | Tool carrier, machine tool system and tool carrier method |
JP7239394B2 (en) * | 2019-05-29 | 2023-03-14 | ファナック株式会社 | Industrial machinery |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
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CN1004996B (en) * | 1985-07-31 | 1989-08-16 | 东芝机械株式会社 | Automatic tool exchange apparatus |
JPH0780109B2 (en) * | 1988-06-30 | 1995-08-30 | ブラザー工業株式会社 | Automatic tool changer for machine tools |
JPH06190671A (en) * | 1992-12-28 | 1994-07-12 | Makino Milling Mach Co Ltd | Automatic tool exchange method and device therefor |
JP3350375B2 (en) * | 1996-11-19 | 2002-11-25 | ブラザー工業株式会社 | Tool holding device |
JPH10263971A (en) * | 1997-03-25 | 1998-10-06 | Brother Ind Ltd | Tool replacement device for machine tool |
DE19732627B4 (en) * | 1997-07-29 | 2005-12-15 | Ex-Cell-O Gmbh | tool magazine |
JP4269470B2 (en) * | 2000-02-10 | 2009-05-27 | ブラザー工業株式会社 | Tool storage device |
JP2002137149A (en) * | 2000-10-27 | 2002-05-14 | Okuma Corp | Tool and tool information reading system |
-
2004
- 2004-01-20 JP JP2004011748A patent/JP4655477B2/en not_active Expired - Lifetime
- 2004-12-01 TW TW93137053A patent/TWI246447B/en active
-
2005
- 2005-01-20 CN CNB2005100059260A patent/CN100351038C/en active Active
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102717288A (en) * | 2011-03-28 | 2012-10-10 | 兄弟工业株式会社 | Machine tool and cutter changing method |
CN102717288B (en) * | 2011-03-28 | 2015-07-08 | 兄弟工业株式会社 | Machine tool and cutter changing method |
CN104416400B (en) * | 2013-09-10 | 2016-11-23 | 发那科株式会社 | The cutter changing device of lathe |
Also Published As
Publication number | Publication date |
---|---|
JP2005205503A (en) | 2005-08-04 |
TWI246447B (en) | 2006-01-01 |
JP4655477B2 (en) | 2011-03-23 |
CN100351038C (en) | 2007-11-28 |
TW200524703A (en) | 2005-08-01 |
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