CN105043190A - Five-axis linkage machine tool RTCP dynamic precision calibrating apparatus and calibrating method thereof - Google Patents

Five-axis linkage machine tool RTCP dynamic precision calibrating apparatus and calibrating method thereof Download PDF

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CN105043190A
CN105043190A CN201510237819.4A CN201510237819A CN105043190A CN 105043190 A CN105043190 A CN 105043190A CN 201510237819 A CN201510237819 A CN 201510237819A CN 105043190 A CN105043190 A CN 105043190A
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China
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axis
lathe
contact type
rtcp
clock gauge
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CN201510237819.4A
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CN105043190B (en
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刘新山
文长明
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中工科安科技有限公司
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Abstract

The invention discloses a five-axis linkage machine tool RTCP dynamic precision calibrating apparatus and a calibrating method thereof. The apparatus comprises a support, and a first face contact type dial gauge and a second face contact type dial gauge both arranged on the support. The central axes of the two face contact type dial gauges are perpendicular to each other and located in the same plane. The apparatus satisfies the following formula: d1=d2<=r-3mm. d1 is the distance between the measuring end face of the first face contact type dial gauge to the vertically intersecting point of the central axes of the two face contact type dial gauges. d2 is the distance between the measuring end face of the second face contact type dial gauge to the vertically intersecting point of the central axes of the two face contact type dial gauges. r is the bulb radius of a bulb test rod for calibration. By using the two face contact type dial gauges arranged on the support, the apparatus prevents complex equation solving processes, conventional dial gauge calculating errors and measuring geometric errors, and complex operations during a conventional calibration method using process. The calibration efficiency and the calibration precision are thus greatly improved. The invention further discloses a calibrating method for the five-axis linkage machine tool RTCP dynamic precision calibrating apparatus.

Description

Five-axis linkage machine tools RTCP dynamic accuracy caliberating device and scaling method thereof
Technical field
The present invention relates to a kind of five-axis linkage machine tools RTCP (RotationToolCenterPoint, five-axle linkage rotating knife cusp is programmed) dynamic accuracy caliberating device and scaling method thereof.
Background technology
Along with the development of China's machine tool technology, high precision, high efficiency five-axis machine tool are applied to the fields such as space flight, military project, automobile and some civil corporations more and more, and domestic also have many Machine Manufacture business research and develop and produce five-axis machine tool.No matter be when Machine Manufacture negotiates the transfer of examination five-axis machine tool, or lathe user is to lathe periodic detection or when safeguarding, the RTCP precision of five-axis linkage machine tools is a very important precision index, especially the RTCP precision of user to lathe has special, strict regular accuracy detection specification especially, because the RTCP precision of lathe directly has influence on the machining precision of processing work.RTCP precision weighs the important indicator of modern five-axis linkage machine tools dynamic accuracy.So how to improve the demarcation of RTCP, precision and efficiency of detecting is significant.
Five-axle linkage RTCP dynamic accuracy is demarcated or detects, mostly current domestic current method is to adopt: repeatedly set up dial gauge or clock gauge in the different azimuth of lathe, and need the form repeatedly converting clock gauge in the orientation that these are different, then make lathe run certain program behavior, the numerical value of obtaining a result of the difference of reading analysis with reference to dial gauge or clock gauge fills in system.Due to the restriction of institute's operative installations in current methods, it is demarcated or there is the inevitable error of calculation and measure geometry error in detection method, thus the data obtained can not one-shot measurement very accurate, thus the degree of accuracy of affecting parameters compensation and efficiency, and commissioning staff also has to repeatedly repeatedly to carry out to detect, correction, to assess trueness error, to correct.
Simultaneously, inventor notices: special design apparatus repeatedly need not set up clock gauge to have indivedual book to mention, but need the position of repeatedly repeatedly moving clock gauge with the pole location making clock gauge align the ball of bulb inspection rod, such device does not break away from current methods some restriction using conventional clock gauge equally.
Summary of the invention
Based on above-mentioned defect, the invention provides a kind of five-axis linkage machine tools RTCP dynamic accuracy caliberating device and scaling method thereof, utilize the present invention to carry out five-axle linkage RTCP dynamic accuracy to demarcate or detect, its process is very succinct, convenient, utilize the layout of two face contact type clock gauges in rack space, avoid the solution procedure of sophisticated equation dexterously, avoid the error of calculation and the measure geometry error of conventional clock gauge; Avoid the complex operations under existing scaling method simultaneously, thus significantly improve demarcation efficiency, improve stated accuracy.
Solution of the present invention is: a kind of five-axis linkage machine tools RTCP dynamic accuracy caliberating device, and it comprises support (3) and is arranged on face contact type clock gauge on support (3) (1) and face contact type clock gauge two (2); The axis of two face contact type clock gauges is mutually vertical and in same plane, this device meets following formula: d 1=d 2≤ r-3mm, wherein, d 1for the measurement end face of face contact type clock gauge one (1) is to the distance of the square crossing point of the axis of two face contact type clock gauges, d 2for the measurement end face of face contact type clock gauge two (2) is to the distance of the square crossing point of the axis of two face contact type clock gauges, r is the Probe-radius demarcating bulb inspection rod used.
As the further improvement of such scheme, support (3) has the installation position one (31) for installed surface contact clock gauge one (1), the installation position two (32) for installed surface contact clock gauge two (2); Two installation positions vertically form two-dimensional space mutually.
Further, support (3) comprises level frame (34) and vertical rack (35), installation position one (31) is arranged on level frame (34), and installation position two (32) is arranged on vertical rack (35).
Preferably, level frame (34) is set to base, and this base is for being fixed on the worktable of lathe by this device.
Again preferably, this base is the magnet base with push button magnetic switch.
As the further improvement of such scheme, support (3) is provided with handle.
As the further improvement of such scheme, support (3) is integral type structure.
The present invention also provides the five-axis linkage machine tools RTCP precision calibration method of above-mentioned any five-axis linkage machine tools RTCP dynamic accuracy caliberating device, five axles comprise the first linear axis, the second linear axis, the 3rd linear axis, revolving shaft, axis of swing, wherein, three linear axis are mutually vertical, and revolving shaft and axis of swing are the turning axle rotated centered by wherein two linear axis of three linear axis respectively; This five-axis linkage machine tools RTCP precision calibration method comprises the following steps:
1) this device is adsorbed in the appropriate location on the worktable of lathe, and make the axis of rotation of axis perpendicular to the axis of swing of lathe of face contact type clock gauge two (2), run the servo direct bobbin at machine tool chief axis place, the point of intersection that the bulb centre of sphere making the bulb on main shaft examine rod is roughly positioned at two face contact type clock gauge axis is position, start lathe RTCP function, after running the revolving shaft 90 ° of lathe, by the zero setting of two face contact type clock gauge readings;
2) run 180 °, machine tool rotary axle, the reading value one of reading face contact clock gauge two (2), the axis of rotation that the half of this reading value one is revolving shaft axis of swing error algebraic value one on the first linear axis direction; Close lathe RTCP function, this error algebraic value one is pressed in the correlation parameter in the error compensation rule writing system of dependency number Ore-controlling Role;
3) lathe RTCP function is started, run revolving shaft to initial position, run axis of swing 90 °, read the reading value two of two face contact type clock gauges and reading value three respectively, the axis of rotation obtaining axis of swing according to following formula revolving shaft error algebraic value two ε on the second linear axis and the 3rd linear axis direction zwith error algebraic value three ε y: I 1yz, I 2=-ε y+ ε z, wherein, I 1, I 2the reading value two of presentation surface contact clock gauge one (1) and the reading value three of face contact type clock gauge two (2) respectively; Close lathe RTCP function, by ε z, ε yby in the correlation parameter in the error compensation rule writing system of dependency number Ore-controlling Role;
4) lathe RTCP function is started, run axis of swing to initial position, run revolving shaft 180 °, the reading value four of record surface contact clock gauge (2), the half of this reading value four is the orthogonal distance error algebraic value four between the axis of rotation of revolving shaft and the axis of rotation of axis of swing; Close lathe RTCP function, error algebraic value four is pressed in the correlation parameter in the error compensation rule writing system of dependency number Ore-controlling Role;
5) after above-mentioned four steps complete, then the RTCP precision calibration work of lathe completes, and then can link by integrated operation lathe five axle under RTCP state simultaneously, and the RTCP dynamic accuracy detecting lathe demarcates effect.
As the further improvement of such scheme, in step 1) in, lathe various conventional accuracy detection, compensated after, run each turning axle zero setting position that lathe makes lathe, this device is positioned on the worktable of lathe, utilize conventional clock gauge to measure end face by two of this device to beat directly, make two measurement end faces parallel with the X-axis of lathe; This device is fixed on the table; Run each axis servomotor of lathe, make the centre of sphere of the bulb inspection rod be installed on the main shaft of lathe roughly be positioned at the square crossing point of the axis of two face contact type clock gauges.
As the further improvement of such scheme, often obtain an error algebraic value, just first close the RTCP function of lathe, corresponding error algebraic value is filled in the correlation parameter of digital control system; Then, before carrying out obtaining the step of next error algebraic value, then the RTCP function of lathe is opened.
Compare with detection method with existing or traditional caliberating device, apparatus of the present invention and method tool have the following advantages: easy to operate simple and easy, save time, laborsaving; Demarcate or accuracy of detection high; Demarcate or detection efficiency high.
The advantage concrete manifestation of this device is as follows:
One, easy to use, applied range: device is simple and direct, compact conformation, and volume is little, is not only applicable to small-sized Five-axis NC Machining Center, can not produces interference, the excess of stroke etc., is applicable to the five-axis machine tools such as large-sized gantry again; Not only be applicable to double pendulum hair style, also applicable double pendulum working platform type and yaw add all types of five-axis linkage machine tools of turntable type.Principle is the same, and method is similar.Profile is succinct, and is convenient to picking and placeing of staff;
Two, precision is high, shows: 1. do not need to solve complicated equation, also there is not the error term in existing detection method, thus also repeatedly detects with regard to not needing demarcation, testing result, revise; 2, there is not the error caused because of the Probe-radius of clock gauge table point; 3, do not exist because manually place clock gauge, and make meter bar and the not parallel error caused of associated straight bobbin; 4, demarcate or measure omnidistance without the need to the manual intervention to device, avoiding the trueness error that the interference of extraneous force factor to stated accuracy brings;
Three, easy to operate simple and easy, demarcation efficiency is high, shows: 1, do not need repeatedly to move clock gauge, with the ball limit utilizing its peak value to carry out centering bulb inspection rod; 2, do not need repeatedly to set up the position of clock gauge on platen and the state of conversion clock gauge; 3, do not need repeatedly to adjust and be will adjust clock gauge orientation in each different position, to make table bar be parallel to lathe axis servomotor as much as possible, this device only need once be placed and by parallel for a certain to its side and lathe linear axis; 4, calculate simply, exclusive face contact type clock gauge device and detection method thereof avoid the equational of complexity and solve or approximate choice; Simultaneously owing to there is not error of calculation item and geometric error item, thus this scaling method does not need repeatedly to detect, correction result.
Accompanying drawing explanation
Fig. 1 is the perspective view of five-axis linkage machine tools RTCP dynamic accuracy caliberating device of the present invention.
Fig. 2 is the front view of Fig. 1.
Fig. 3 is the application schematic diagram of Fig. 1.
Fig. 4 is the partial dynamic process schematic of Fig. 3.
Fig. 5 is a source of error schematic diagram under existing scaling method.
Fig. 6 is the close-up schematic view of Fig. 5.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
See also Fig. 1 and Fig. 2, the five-axis linkage machine tools RTCP dynamic accuracy caliberating device that present pre-ferred embodiments proposes comprises support 3 and is arranged on face contact type clock gauge on support 31 and face contact type clock gauge 22.
The axis of two face contact type clock gauges is mutually vertical and in same plane, this device meets following formula: d 1=d 2≤ r-3mm, wherein, d 1for the distance of the square crossing point of the axis of measurement end face 11 to two face contact type clock gauges of face contact type clock gauge 1, d 2for the distance of the square crossing point of the axis of measurement end face 21 to two face contact type clock gauges of face contact type clock gauge 22, r is the Probe-radius (being generally 15mm) that dynamic accuracy demarcates bulb inspection rod used.With radius be 15mm bulb inspection rod be example, measure end face 11 for two, 12 want <15mm to the distance of point of crossing, and leave certain allowance, this guarantee (goes bulb to examine that the baseball heart is placed on point of crossing is cumbersome exactly when the bulb centre of sphere of bulb inspection rod is roughly positioned on point of crossing, even if but the face contact type of this device can ensure that there is certain site error the centre of sphere and point of crossing, precision calibration or detection is not affected) yet, the sounding rod of two face contact type clock gauges (is namely measured end face simultaneously, the sounding rod that measurement end face is positioned at can stretch, only compress into, clock gauge just has reading) a press-in part, thus make two face contact type clock gauges just have reading, and leave certain reserve travel.
As long as meeting under above condition, support 3 just arbitrarily can expand setting.In the present embodiment, support 3 comprises level frame 34 and vertical rack 35.Level frame 34 is set to base, and this base is for being positioned at the worktable of lathe by this device.Conveniently this device practical, base is the magnet base with push button magnetic switch 4.Like this, when using this device, base is only needed to place on the table, worktable is generally all metal material, therefore, after reserving expectation orientation, only conveniently need can be started the magnetic of magnet base by push button magnetic switch 4, support 3 just can be made to be adsorbed on worktable stably, securely.The push button design of magnetic switch 4 can be avoided when opening the magnetic function of magnet base, because of the skew of the base that shake produces, causes unnecessary calibrated error, measuring error.
Support 3 can have for the installation position 1 of installed surface contact clock gauge 1, the installation position 2 32 for installed surface contact clock gauge 22; Two installation positions vertically form two-dimensional space mutually.Installation position 1 can be arranged on level frame 34, and installation position 2 32 is arranged on vertical rack 35.That is the bottom surface (i.e. level frame 34) of support 3 is mutually vertical with side (i.e. vertical rack 35), the measurement end face of face contact type clock gauge 1 is parallel to support 3 bottom surface, and the measurement end face of face contact type clock gauge 22 is parallel to support 3 side.Level frame 34 can be set to smooth transition face with the transition position of vertical rack 35, support 3 even can arrange handle, be convenient for carrying, of course, also suitably can extend the handle of vertical rack 35 as integrative-structure, strengthen the structural stability of this device.In other embodiments, level frame 34 can also be hollow structure, directly embeds the magnetic function that magnet base realizes support 3.Magnetic switch 4 is also not limited to push button design, can be touch design, or distance type design etc.
In a word, the most important thing is the installation site of two face contact type clock gauges and direction: the bottom surface of support is mutually vertical with side, the axis of two face contact type clock gauges must be mutually vertical and in same plane, and the distance of the measurement end face of the axis of one of them face contact type clock gauge and another face contact type clock gauge is between 0 to 15mm.The measurement end face 11,21 of two face contact type clock gauges is parallel to each other with the bottom surface of support 3 and side respectively, thus ensures that their measurement end face is also mutually vertical.
Generally, five axles of numerically-controlled machine comprise the first linear axis, the second linear axis, the 3rd linear axis, revolving shaft, axis of swing.Wherein, three linear axis are mutually vertical, and revolving shaft and axis of swing are the turning axle rotated centered by wherein two linear axis of three linear axis respectively.In the present embodiment, numerically-controlled machine X, Y, Z tri-axle be three orthogonal linear axis, A, B, C tri-axle be around X, Y, Z tri-turning axle of axle respectively, five axles in five-axle linkage refer to that X, Y, Z tri-linear axis add wherein any two turning axles of A, B, C tri-turning axles, one of them is revolving shaft, and another is axis of swing.
Five-axis linkage machine tools RTCP precision calibration method of the present invention comprises the following steps.
1) this device is adsorbed in the appropriate location on the worktable of lathe, and makes the axis of face contact type clock gauge 22 perpendicular to the axis of rotation of the axis of swing of lathe.Run the servo direct bobbin at machine tool chief axis place, the bulb centre of sphere making the bulb on main shaft examine rod is roughly positioned at the point of intersection position of two face contact type clock gauge axis.Start lathe RTCP function, after running the revolving shaft 90 ° of lathe, by the zero setting of two face contact type clock gauge readings.
2) run 180 °, machine tool rotary axle, the reading value one of reading face contact clock gauge 22, the axis of rotation that the half of this reading value one is revolving shaft axis of swing error algebraic value one on the first linear axis (as X-axis) direction.Close lathe RTCP function, this error algebraic value one is pressed in the correlation parameter in the error compensation rule writing system of dependency number Ore-controlling Role.
3) lathe RTCP function is started, run revolving shaft to initial position, by two face contact type clock gauge reading zero setting, run axis of swing 90 °, read reading value two and the reading value three of two face contact type clock gauges respectively, the axis of rotation obtaining axis of swing according to following formula revolving shaft around the second linear axis (as Z axis) and the 3rd linear axis (namely except revolving shaft and axis of swing the 3rd axle except linear axis, as Y-axis) error algebraic value two ε on direction zwith error algebraic value three ε y: I 1yz, I 2=-ε y+ ε z, wherein, I 1, I 2the reading value two of presentation surface contact clock gauge 1 and the reading value three of face contact type clock gauge 22 respectively.Close lathe RTCP function, by ε z, ε yby in the correlation parameter in the error compensation rule writing system of dependency number Ore-controlling Role.
4) lathe RTCP function is started, run axis of swing to initial position, by two face contact type clock gauge reading zero setting, run revolving shaft 180 °, the reading value four of record surface contact clock gauge 2, the half of this reading value four is the orthogonal distance error algebraic value four between the axis of rotation of revolving shaft and the axis of rotation of axis of swing.Close lathe RTCP function, error algebraic value four is pressed in the correlation parameter in the error compensation rule writing system of dependency number Ore-controlling Role.
5) after above-mentioned four steps complete, then the RTCP precision calibration work of lathe completes.Then can link by integrated operation lathe five axle under RTCP state, the RTCP dynamic accuracy detecting lathe demarcates effect simultaneously.
These four error amounts demarcate basic numerical value used and critical values, the parameter read-in of digital control system, that be digital control system itself with solid anything, different digital control system writing modes is different is that correlation parameter can adjust to some extent.The digital control system correlation parameter such as had refers to: error algebraic value one characterizes the axis of rotation error parameter in the X-axis direction of revolving shaft, error algebraic value two and error algebraic value three characterize the error parameter of axis of rotation in Y direction and Z-direction of axis of swing respectively, and error algebraic value four characterizes the orthogonal distance error parameter of the axis of rotation of revolving shaft and the axis of rotation of axis of swing.And some digital control systems also need extra some simply to arrange, different digital control systems has different requirements.These four crucial, basic error amounts are detected by apparatus and method of the present invention exactly.These four error amounts, just in conjunction with the offset rule of the digital control system of practical application, write in the correlation parameter of digital control systems by those skilled in the art.
Next, illustrate for the five-axis machine tool of double pendulum working platform type, five axles herein in five-axle linkage refer to that X, Y, Z tri-linear axis add A, C two turning axles, and C is revolving shaft here particularly, and A is axis of swing.Certain five-axis machine tool is also likely B, C axle, or A, B axle etc., this device is applicable equally.
Incorporated by reference to Fig. 3 and Fig. 4, device, at timing signal, is adsorbed on the worktable 5 of lathe by the five-axis linkage machine tools RTCP dynamic accuracy caliberating device of the present embodiment.Run lathe to be positioned between measurement end face 11,21 liang of Z-axis zero setter measuring junctions (i.e. the measurement end face 11,21 of two face contact type clock gauges) of two face contact type clock gauges by bulb inspection rod 6, the sphere center position making bulb examine rod 6 is roughly positioned at the axle center point of intersection of two face contact type clock gauges 1,2; Run lathe, make it to perform relevant action, record the reading of two face contact type clock gauges respectively, and after carrying out computing according to analytical formula, acquired results is lathe five-axle linkage RTCP trueness error value, write in lathe correlation parameter, namely completed the demarcation of a five-axis linkage machine tools RTCP dynamic accuracy.
Start numerically-controlled machine RTCP function, lathe is made to run various actions designed by this method: 1) to make the axis of the face contact type clock gauge 22 of absorption this device thereon perpendicular to axis (i.e. X-axis) direction of axis of swing, clock gauge reading zero setting after operation revolving shaft 90 °, then revolving shaft 180 ° is run, the reading of reading face contact clock gauge 22; 2) run revolving shaft to initial position, run axis of swing 90 °, read the reading of two face contact type clock gauges, see Fig. 4; 3) run axis of swing to initial position, run revolving shaft 180 °, the reading of record surface contact clock gauge.Utilize the equation of this method to process above-mentioned reading value, namely obtain this five-axis linkage machine tools RTCP dynamic accuracy error amount, by its value by the offset rule write correlation parameter of digital control system, then demarcated.And the above-mentioned 2nd) step be demarcate, detect difficult point, be also the most obviously one of embodiment place that this scaling method is better than current methods:
Analytic routines scaling method and this scaling method are the above-mentioned 2nd) difference of step:
First analysis and utilization conventional equipment and method gained reading value and its pass surveyed between lathe RTCP trueness error value be see shown in Fig. 5 and Fig. 6:
I 1 = - &epsiv; Y - &epsiv; Z - [ R - R 2 - ( &epsiv; Y - &epsiv; Z ) 2 ] - &Delta; 1 ………………①
I 2 = - &epsiv; Y + &epsiv; Z - [ R - R 2 - ( &epsiv; Y + &epsiv; Z ) 2 ] + &Delta; 2 ………………②。
And utilize apparatus of the present invention and method, adopt the mode of face contact type clock gauge that the limit of the surface of contact of clock gauge moment and ball on direction of measurement is kept in touch, thus avoid in aforesaid equation xiang He (e namely in Fig. 6), and the measurement contact jaw eliminated due to conventional clock gauge is bulb shape but not desirable cusp and the error delta 1 that produces and Δ 2.Thus the relational expression analyzed between gained clock gauge reading value and institute survey lathe RTCP trueness error value is:
I 1=-ε YZ………………③
I 2=-ε YZ………………④
In above-mentioned four formulas, I 1, I 2the reading value of presentation surface contact clock gauge respectively; ε yand ε zbe illustrated respectively in the error in its Y-direction and Z-direction of lathe axis of swing distance of shaft centers in the RTCP precision that will detect demarcation; R represents the size (being generally 15mm) of excellent 6 radiuses of bulb inspection; The measurement contact jaw that Δ 1 and Δ 2 represent due to conventional clock gauge is respectively actually the geometric error that a spherical and imperfect cusp causes, and this number is generally smaller certainly.From 1 formula and 2 formulas: even if do not consider Δ 1 and the Δ 2 of handing over less error, its equation is also more complicated, separate its value is consuming time, effort.
And 3 formulas and 4 formulas utilize the relational expression between the face contact type clock gauge reading of apparatus of the present invention and method gained and RTCP trueness error.Can find out, apply these apparatus and method avoid current methods under error term, thus enormously simplify the relation between clock gauge reading and lathe RTCP trueness error.Improve stated accuracy and efficiency.
Five-axis linkage machine tools RTCP dynamic accuracy is demarcated, and is also the testing process of its dynamic RTCP dynamic accuracy.So this caliberating device and scaling method are applied to the detection of RTCP dynamic accuracy with same superiority.
In sum, in the present embodiment, the five-axis linkage machine tools RTCP precision calibration method of this device comprises the following steps.
The first step: lathe various conventional accuracy detection, compensated after, run each turning axle back to zero position that lathe makes lathe, this device is positioned on the worktable of lathe, utilize conventional clock gauge by bracket side plane by this device centering, two is made to measure end face parallel with the X-axis of lathe, this device is absorbed and fixed on worktable, run machine Z-axis, make the centre of sphere of the bulb inspection rod be installed on the main shaft of lathe roughly be positioned at the square crossing point of the axis of two face contact type clock gauges.
Second step: start lathe RTCP function, run 90 °, the C axle of lathe, by the zero setting of two face contact type clock gauge readings, now the axis being parallel of face contact type clock gauge 22 is in X-axis, it measures end face perpendicular to X-axis, run 180 degree, C axle, the value of reading face contact clock gauge 22 is reading value one, the half of this reading value one is the worktable of lathe that is the axis of rotation RTCP trueness error algebraic value one in the X-axis direction of C axle, close the RTCP function of lathe, this error algebraic value one is pressed in the correlation parameter of offset rule write control system of the control system of lathe.
3rd step: start lathe RTCP function, run 90 degree, C axle, now the axis parallel of face contact type clock gauge 22 is in Y-axis, and its side amount end face is perpendicular to Y-axis.By all zero setting of the reading of two face contact type clock gauges, run lathe A axle half-twist, record reading value two and the reading value three of two face contact type clock gauges, according to error algebraic value two ε of A axle axis of rotation in Y direction and Z-direction obtaining lathe with under type simultaneously ywith error algebraic value three ε z, I 1yz, I 2=-ε y+ ε z, wherein, I 1, I 2the reading value two of presentation surface contact clock gauge 1 and the reading value three of face contact type clock gauge 22 respectively.Close the RTCP function of lathe, the offset rule that error algebraic value two and error algebraic value three press the control system of lathe is write in the correlation parameter of control system.
4th step: start lathe RTCP function, run the A axle return-to-zero position of lathe, by the reading zero setting of face contact type clock gauge 2, run C axle and rotate 180 °, the value of reading face contact clock gauge 22 is reading value four, the half of this reading value four is the worktable of lathe and the orthogonal distance error algebraic value four of C axle axis of rotation and A axle axis of rotation, closes RTCP function, is write in the correlation parameter of control system by the offset rule of this error algebraic value four by digital control system.
5th step: after performing above-mentioned four steps, the RTCP precision calibration of lathe completes, and finally again start lathe RTCP, five axles of integrated operation lathe link simultaneously, utilizes this device to detect the demarcation effect of lathe RTCP dynamic accuracy.
As shown in Figure 3, first by each for lathe axis servomotor back to zero or be placed in appropriate location.This device is positioned over the appropriate location of the worktable of lathe, utilizes conventional clock gauge by its align laterally, make device side be parallel to a certain linear axis of lathe, even if also measuring junction face 2 is parallel to a certain linear axis of lathe.By the magnetic switch 4 on lower device, then device firmly, is stably adsorbed on platen.Between whole RTCP precision calibration after this or detection period, without the need to manually mobile or adjust this device again.
Manually can run lathe, the centre of sphere of the bulb be installed on machine tool chief axis inspection rod 6 roughly be moved to the point of intersection of the axis of two face contact type clock gauges.Now two face contact type clock gauges are depressed about 3 ~ 5mm respectively, which ensure that measured error all has the scope allowance of 3 ~ 5mm (this is concerning enough five axle RTCP trueness errors, and the measurement range of certain apparatus of the present invention is not limited to 3 ~ 5mm) in positive and negative both direction.
Because device have employed face contact type clock gauge, and be designed to the layout on support 3 as shown in Figure 1, 2.The own bottom faces of device (i.e. level frame 34) is parallel with the measured surface (namely measuring end face 11) of face contact type clock gauge 1, namely vertical with the measured surface (namely measuring end face 21) of face contact type clock gauge 22, and device bottom surface is mutually vertical with side (i.e. vertical rack 35), therefore the measurement end face 11,21 of two face contact type clock gauges is mutually vertical, the axis of two face contact type clock gauges is also parallel with respective associated machine tool linear axis respectively.Of course, the support 3 of this device is that bottom surface (i.e. level frame 34) is vertical with side (i.e. vertical rack 35), but be not limited to this, as long as meet: make the surface of contact of the face contact type clock gauge of side be parallel to a certain linear axis of lathe (as X-axis) (also namely wherein axes normal in another linear axis corresponding, as Y-axis).
So this structure and layout of this device, bring following advantage:
First, the structure of device itself just determine two face contact type clock gauges axis all with its associated machine tool axis servomotor axis being parallel.Avoiding problems and artificially under existing pick-up unit and method handle clock gauge table bar and the not parallel and error brought of associated machine tool axis servomotor axis, reduce the requirement to operating personnel's technical merit simultaneously;
Secondly, the face contact type clock gauge adopted and layout thereof, what make the now bulb inspection rod bulb of 6 and two of device measure the contact point of end face 11,21 is exactly two limits that bulb examines excellent 6 bulbs naturally, avoiding problems and move back and forth clock gauge with the loaded down with trivial details action of the pole location of centering ball under current methods, avoid the error that device produces by external force affects simultaneously;
Again, this device have employed this layout structure of two face contact type clock gauges on support 3 simultaneously, avoids the troublesome operation of repeatedly setting up clock gauge in the different azimuth of bulb inspection rod 6.
Above step can be found out, utilize this caliberating device and scaling method thereof, without the need to as the position of repeatedly moving clock gauge under current mode, without the need to repeatedly converting the orientation of dial gauge or clock gauge, also without the need to repeatedly moving clock gauge thus determining that bulb examines the pole location of the ball of rod by the reading peak value of clock gauge, without the need to solving complicated equation or repeatedly repeatedly detecting to revise testing result.
These apparatus and method need lay centering for the first time in whole demarcation and omnidistance of detection, and process is again without the need to manually carrying out intervention operation to device thereafter, and calculate very simple, and stated accuracy is high.Under existing demarcation detection mode, complete whole demarcation or testing process, usually need a hours, even several hours.And apply this device and detection method can complete in 10 minutes, substantially increase demarcation efficiency.
The foregoing is only the preferred embodiment of the invention; not in order to limit the invention; the any amendment done within all spirit in the invention and principle, equivalently to replace and improvement etc., within the protection domain that all should be included in the invention.

Claims (10)

1. a five-axis linkage machine tools RTCP dynamic accuracy caliberating device, is characterized in that: it comprises support (3) and is arranged on face contact type clock gauge on support (3) (1) and face contact type clock gauge two (2); The axis of two face contact type clock gauges is mutually vertical and in same plane, this device meets following formula: d 1=d 2≤ r-3mm, wherein, d 1for the measurement end face of face contact type clock gauge one (1) is to the distance of the square crossing point of the axis of two face contact type clock gauges, d 2for the measurement end face of face contact type clock gauge two (2) is to the distance of the square crossing point of the axis of two face contact type clock gauges, r is the Probe-radius of the bulb inspection rod demarcated.
2. five-axis linkage machine tools RTCP dynamic accuracy caliberating device as claimed in claim 1, is characterized in that: support (3) has the installation position one (31) for installed surface contact clock gauge one (1), the installation position two (32) for installed surface contact clock gauge two (2); Two installation positions vertically form two-dimensional space mutually.
3. five-axis linkage machine tools RTCP dynamic accuracy caliberating device as claimed in claim 2, it is characterized in that: support (3) comprises level frame (34) and vertical rack (35), installation position one (31) is arranged on level frame (34), and installation position two (32) is arranged on vertical rack (35).
4. five-axis linkage machine tools RTCP dynamic accuracy caliberating device as claimed in claim 3, it is characterized in that: level frame (34) is set to base, this base is for being fixed on the worktable of lathe by this device.
5. five-axis linkage machine tools RTCP dynamic accuracy caliberating device as claimed in claim 4, is characterized in that: this base is the magnet base with push button magnetic switch.
6. five-axis linkage machine tools RTCP dynamic accuracy caliberating device as claimed in claim 1, is characterized in that: support (3) is provided with handle.
7. five-axis linkage machine tools RTCP dynamic accuracy caliberating device as claimed in claim 1, is characterized in that: support (3) is integral type structure.
8. the five-axis linkage machine tools RTCP precision calibration method of a five-axis linkage machine tools RTCP dynamic accuracy caliberating device as claimed in any of claims 1 to 7 in one of claims, five axles comprise the first linear axis, the second linear axis, the 3rd linear axis, revolving shaft, axis of swing, wherein, three linear axis are mutually vertical, and revolving shaft and axis of swing are the turning axle rotated centered by wherein two linear axis of three linear axis respectively; It is characterized in that: it comprises the following steps:
1) this device is adsorbed in the appropriate location on the worktable of lathe, and make the axis of rotation of axis perpendicular to the axis of swing of lathe of face contact type clock gauge two (2), run the servo direct bobbin at machine tool chief axis place, the point of intersection that the bulb centre of sphere making the bulb on main shaft examine rod is roughly positioned at two face contact type clock gauge axis is position, start lathe RTCP function, after running the revolving shaft 90 ° of lathe, by the zero setting of two face contact type clock gauge readings;
2) run 180 °, machine tool rotary axle, the reading value one of reading face contact clock gauge two (2), the axis of rotation that the half of this reading value one is revolving shaft axis of swing error algebraic value one on the first linear axis direction; Close lathe RTCP function, this error algebraic value one is pressed in the correlation parameter in the error compensation rule writing system of dependency number Ore-controlling Role;
3) lathe RTCP function is started, run revolving shaft to initial position, run axis of swing 90 °, read the reading value two of two face contact type clock gauges and reading value three respectively, the axis of rotation obtaining axis of swing according to following formula revolving shaft error algebraic value two ε on the second linear axis and the 3rd linear axis direction zwith error algebraic value three ε y: I 1yz, I 2=-ε y+ ε z, wherein, I 1, I 2the reading value two of presentation surface contact clock gauge one (1) and the reading value three of face contact type clock gauge two (2) respectively; Close lathe RTCP function, by ε z, ε yby in the correlation parameter in the error compensation rule writing system of dependency number Ore-controlling Role;
4) lathe RTCP function is started, run axis of swing to initial position, run revolving shaft 180 °, the reading value four of record surface contact clock gauge (2), the half of this reading value four is the orthogonal distance error algebraic value four between the axis of rotation of revolving shaft and the axis of rotation of axis of swing; Close lathe RTCP function, error algebraic value four is pressed in the correlation parameter in the error compensation rule writing system of dependency number Ore-controlling Role;
5) after above-mentioned four steps complete, then the RTCP precision calibration work of lathe completes, and then can link by integrated operation lathe five axle under RTCP state simultaneously, and the RTCP dynamic accuracy detecting lathe demarcates effect.
9. five-axis linkage machine tools RTCP precision calibration method as claimed in claim 8, it is characterized in that: in step 1) in, lathe various conventional accuracy detection, compensated after, run each turning axle zero setting position that lathe makes lathe, this device is positioned on the worktable of lathe, utilize conventional clock gauge to measure end face by two of this device to beat directly, make two measurement end faces parallel with the X-axis of lathe; This device is fixed on the table; Run each axis servomotor of lathe, make the centre of sphere of the bulb inspection rod be installed on the main shaft of lathe roughly be positioned at the square crossing point of the axis of two face contact type clock gauges.
10. five-axis linkage machine tools RTCP precision calibration method as claimed in claim 8, is characterized in that: often obtain an error algebraic value, just first closes the RTCP function of lathe, by the correlation parameter of corresponding error algebraic value write digital control system; Then, before the step carrying out obtaining next error algebraic value is run, then the RTCP function of lathe is opened.
CN201510237819.4A 2015-05-11 2015-05-11 Five-axis linkage machine tools RTCP dynamic accuracies caliberating device and its scaling method CN105043190B (en)

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CN110823059B (en) * 2019-10-14 2021-04-30 湖北三环锻造有限公司 Device for detecting center height of automobile steering knuckle

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CN110823059B (en) * 2019-10-14 2021-04-30 湖北三环锻造有限公司 Device for detecting center height of automobile steering knuckle

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