CN111623817B - High-precision turntable without magnetic speed - Google Patents
High-precision turntable without magnetic speed Download PDFInfo
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- CN111623817B CN111623817B CN202010402954.0A CN202010402954A CN111623817B CN 111623817 B CN111623817 B CN 111623817B CN 202010402954 A CN202010402954 A CN 202010402954A CN 111623817 B CN111623817 B CN 111623817B
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- 239000004579 marble Substances 0.000 claims abstract description 24
- 238000004321 preservation Methods 0.000 claims abstract description 16
- 238000003825 pressing Methods 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 7
- 230000033001 locomotion Effects 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 125000006850 spacer group Chemical group 0.000 claims description 5
- 230000007613 environmental effect Effects 0.000 abstract description 10
- 239000004575 stone Substances 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 229910052755 nonmetal Inorganic materials 0.000 description 6
- 238000009826 distribution Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 210000004907 gland Anatomy 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
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- Transmission And Conversion Of Sensor Element Output (AREA)
- Machine Tool Sensing Apparatuses (AREA)
Abstract
The invention discloses a high-precision turntable without magnetic velocity, belonging to the technical field of sensor calibration, wherein a calibration table base is arranged on a marble foundation stone with extremely small deformation under the influence of environmental temperature, the influence of the environmental temperature on the base is avoided, and the influence of the environmental temperature on the calibration precision of a sensor is reduced, a sensor calibration device adopts a plurality of groups of bearings to be mutually matched to realize rotatable installation on the calibration table base, the sensor calibration device can realize the adjustment of an inclination angle relative to a base plate, a plurality of fixing through holes which are mutually matched with fixing lug seats are arranged on a stand, further the fixing lug seats and the fixing through holes which are distributed in an arc shape are mutually matched to realize the fixation of the sensor calibration device under a plurality of inclination angles, meanwhile, a coaxial heat preservation device is arranged outside the sensor calibration device, and the mutual matching can realize the calibration of the sensor with high precision, high, the influence of the magnetic environment on the calibration precision of the sensor is eliminated by providing the coaxial heat preservation device without the magnetic environment.
Description
Technical Field
The invention relates to the technical field of sensor calibration, in particular to a high-precision turntable without magnetic velocity.
Background
The process of scaling the sensor with a standard instrument is called calibration. In particular to a piezoelectric pressure sensor, a series of processes of generating a standard force with known magnitude by using a special calibration device such as a piston manometer to act on the sensor, outputting a corresponding charge signal by the sensor, measuring the charge signal by using a standard detection device with known precision to obtain the magnitude of the charge signal, and obtaining a set of input-output relations, are calibration processes of the piezoelectric pressure sensor. The three-axis turntable is widely applied to calibration of various direction sensors, and the stability and repeated positioning precision of the structure of the three-axis turntable have decisive influence on the measurement precision of the sensors.
The traditional three-axis turntable adopts bevel gears or worm gears and other mechanisms for transmission, has a complex structure, has very high requirements on the processing precision of structural members and the technical level of assembly workers, and is high in manufacturing cost and maintenance cost and difficult to maintain. At present, the existing three-axis rotary table is manually rotated for calibration, the rotating speed is low, and only static calibration can be carried out. Alloy steel or cast iron is used as a base in the aspect of structure, the precision is greatly influenced by the change of environmental temperature, and no nonmagnetic turntable is arranged at home at present, so that the high-precision calibration of the sensor cannot be realized.
Disclosure of Invention
The invention provides a high-precision turntable without magnetic velocity, which can avoid the influence of ambient temperature on a base, realize the calibration of a sensor with high precision, high rotating speed and high temperature, and eliminate the influence of a magnetic environment on the calibration precision of the sensor by providing a nonmagnetic environment.
The specific technical scheme provided by the invention is as follows:
the invention provides a high-precision rotation table without magnetic velocity, which comprises a bottom plate, a vertical table fixed on the bottom plate, a first bearing seat fixed at the upper end of the vertical table, a transverse rotating shaft rotatably arranged in the first bearing seat by adopting a first bearing, a second bearing seat arranged on the transverse rotating shaft by adopting a second bearing, a lower rotation table fixed at the upper end of the second bearing seat, a third bearing seat fixed on the lower rotation table, a vertical rotating shaft arranged in the third bearing seat by adopting a third bearing, an upper rotation table fixed on the vertical rotating shaft, and a sensor calibration table fixed on the upper rotation table, wherein the sensor calibration table comprises a marble base fixed on the upper surface of the upper rotation table, a calibration table base fixed on the upper surface of the marble base, a sensor calibration device fixed on the calibration table base and a coaxial heat preservation device, the lower surface of marble base is provided with fixed ear seat, found bench be provided with a plurality of fixed through-hole of fixed ear seat mutually supporting, it is a plurality of fixed through-hole is in found bench along an circular arc distribution the both ends of marble base all are provided with fixed ear seat.
Optionally, the sensor calibration device comprises a fourth bearing and a fifth bearing fixed on the calibration table base, a fourth bearing and a fifth bearing are respectively arranged at two ends of the fourth bearing and the fifth bearing, a rotary table tool arranged in the fourth bearing, a sensor fixture arranged in the rotary table tool, clamping blocks arranged at two ends of the sensor fixture, a pressing block arranged on the side wall of the rotary table tool, a sixth bearing and a rotary table motor base fixed on the calibration table base, a rotary table motor fixed on the rotary table motor base, a transmission shaft connected with an output shaft of the rotary table motor by a connecting flange, and a sixth bearing used for fixing the transmission shaft, wherein the transmission shaft is connected with the rotary table tool by a coupler, the sixth bearing is arranged in the sixth bearing, the pressing block and the clamping blocks are matched with each other to realize that the sensor fixture is fixed in the rotary table tool And the sensor clamp fixes the sensor to be calibrated in the turntable tool.
Optionally, the revolving stage frock is hollow rotating shaft just be provided with the hot-flow hole on the inner wall of revolving stage frock, coaxial coupling flange and conductive slip ring are installed to the left end of revolving stage frock, wherein, conductive slip ring adopts the fix with screw the left end of coaxial coupling flange.
Optionally, the coaxial heat preservation device includes a coaxial inner cylinder and a coaxial outer cylinder which are concentrically arranged, a coaxial inner side plate fixed at the end of the coaxial inner cylinder, a coaxial outer side plate fixed at the end of the coaxial outer cylinder, and an end fixed on the coaxial inner side plate and the coaxial outer side plate, wherein a through hole for installing the turntable tool is arranged in the middle of the end.
Optionally, be provided with the snap ring on the outer wall of coaxial urceolus, be provided with the side opening on the coaxial urceolus, the ann changes in the side opening has the rubber buffer, the side opening runs through coaxial urceolus with coaxial inner tube.
Optionally, the coaxial outer side plate is fixed to the end of the coaxial outer cylinder by screws, the coaxial inner side plate is fixed to the end of the coaxial inner cylinder by screws, the end is fixed to the coaxial outer side plate by screws, a nonmetal heating belt is wound on the outer wall of the coaxial inner cylinder, and the nonmetal heating belt is located in an annular space between the coaxial outer cylinder and the coaxial inner cylinder.
Optionally, a support frame is fixedly arranged on the calibration table base, the coaxial outer side plate is fixed on the support frame by using screws, a shaft sleeve is arranged between the support frame and the end, and the lower end of the support frame is fixed on the calibration table base by using screws.
Optionally, the bottom plate is relatively provided with 2 upright platforms, two the bracing piece is provided with between the upright platform, the both ends of bracing piece adopt opening pad cooperation hexagon socket head cap screw to fix upright on the platform, the bottom of founding the platform with adopt the angle connecting piece to consolidate between the bottom plate.
Optionally, the first bearing is installed in the first bearing seat, the first bearing seat adopts the fix with screw the upper end of founding the platform, the outside of first bearing seat is fixed with and is used for the restriction the big bearing cover of the axial position of first bearing, the inboard of first bearing seat is provided with the spacer sleeve that is used for injecing second bearing seat axial displacement, the lower extreme of perpendicular pivot is provided with the fixed plate that is used for restricting third bearing seat and third bearing axial displacement.
Optionally, the outer surfaces of the two ends of the clamping block are conical surfaces, a boss is arranged on the inner surface of the clamping block, a groove matched with the boss is formed in the outer surface of the sensor clamp, the boss is installed in the groove, the pressing block is fixed on the rotary table tool through the hexagon socket head bolt, the lower end of the pressing block abuts against the outer surface of the clamping block, and the lower end of the hexagon socket head bolt abuts against the conical surfaces.
The invention has the following beneficial effects:
the embodiment of the invention provides a calibration table base of a high-precision non-magnetic-rate rotary table, which is arranged on marble foundation stones, the marble foundation stones are influenced by environmental temperature to have extremely small deformation, the influence of the environmental temperature on the foundation bases is avoided, and the influence of the environmental temperature on the calibration precision of a sensor is reduced The sensor calibration with high rotating speed and high temperature is realized by providing the coaxial heat preservation device without the magnetic environment to eliminate the influence of the magnetic environment on the sensor calibration precision.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic isometric view of a high-precision magnetic-rate-free turntable according to an embodiment of the present invention;
FIG. 2 is another isometric view of a high precision magnetic-rate-free turntable according to an embodiment of the present invention;
FIG. 3 is another isometric view of a high precision magnetic-rate-free turntable according to an embodiment of the present invention;
FIG. 4 is a schematic front view of a high-precision rotation table without magnetic velocity according to an embodiment of the present invention;
FIG. 5 is a schematic sectional view taken along line A-A in FIG. 4 according to an embodiment of the present invention;
FIG. 6 is an enlarged partial view of FIG. 5 according to an embodiment of the present invention;
FIG. 7 is a schematic side view of a high-precision non-magnetic-rate turntable according to an embodiment of the present invention;
FIG. 8 is a schematic cross-sectional view taken along line B-B of FIG. 7 in accordance with an embodiment of the present invention;
FIG. 9 is an enlarged partial schematic view of FIG. 8 according to an embodiment of the present invention;
FIG. 10 is an enlarged partial schematic view of the structure of FIG. 9 according to an embodiment of the present invention;
fig. 11 is a schematic cross-sectional view of a coaxial thermal insulation apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A high-precision magnetic-velocity-free turntable according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 11.
Referring to fig. 1, 2 and 3, a high-precision non-magnetic-rate turntable according to an embodiment of the present invention includes a base plate 1, a vertical table 2 fixed on the base plate 1, a first bearing block 3 fixed at an upper end of the vertical table 2, a transverse shaft 5 rotatably mounted in the first bearing block 3 by using a first bearing 4, a second bearing block 7 mounted on the transverse shaft 5 by using a second bearing 6, a lower turntable 8 fixed at an upper end of the second bearing block 7, a third bearing block 9 fixed on the lower turntable 8, a vertical shaft 11 mounted in the third bearing block 9 by using a third bearing 10, an upper turntable 12 fixed at an upper end of the vertical shaft 11, and a sensor calibration table 13 fixed on the upper turntable 12. Referring to fig. 1, 2, 3 and 4, 2 standing platforms 2 are relatively arranged on a bottom plate 1, the bottoms of the two standing platforms 2 are fixed on the upper surface of the bottom plate by corner connectors 14, that is, the standing platform 2 and the bottom plate 1 are reinforced by the corner connectors 14, and the structural strength between the standing platform 2 and the bottom plate 1 is improved by the corner connectors 14.
Referring to fig. 1, 2 and 4, a support rod 15 is arranged between 2 oppositely arranged standing platforms 2, and two ends of the support rod 15 are fixed on the standing platforms 2 by adopting open pads matched with hexagon socket head screws. Referring to fig. 1, 2 and 3, the vertical table 2 is provided with a plurality of through holes, and the support rod 15 is fixed in the through hole of the vertical table 2 by using an open gasket and a hexagon socket head cap screw after passing through the through hole, wherein the open gasket is clamped between the support rod 15 and the vertical table 2. Preferably, 2 stand and adopt 4 bracing pieces 15 to consolidate between the platform 2 that set up relatively, 4 follow the asymmetric setting of bracing piece 15, can fully improve two structural strength and the stability of standing between the platform 2, improve sensor calibration device's demarcation precision.
Referring to fig. 1, 4, 5 and 6, a first bearing 4 of a high-precision magnetic-rate-free turntable according to an embodiment of the present invention is installed in a first bearing seat 3, the first bearing seat 3 is fixed to an upper end of a vertical table 2 by using screws, a large gland 16 for limiting an axial position of the first bearing 4 is fixed to an outer side of the first bearing seat 3, a spacer 17 for limiting an axial movement of a second bearing seat 7 is provided to an inner side of the first bearing seat 3, and a fixing plate 18 for limiting axial movements of a third bearing seat 9 and a third bearing 10 is provided to a lower end of a vertical rotating shaft 11. Wherein, founding the platform 2 and being the marble material, in order to realize founding the fixed between platform 2 and the first bearing frame 3, seted up the cylinder hole and imbed aluminum alloy 7075 base at the upside of founding the platform marble, processing the screw hole on aluminum alloy 7075 base, first bearing frame 1 adopts the hexagon socket head cap screw to fix in the screw hole of founding 2 upsides of platform. Each of the stands 2 is provided at an upper side thereof with a first bearing housing 3, and each of the first bearing housings 3 is provided therein with a first bearing 4, and the first bearing 4 is preferably a sliding bearing. Both ends of the transverse rotating shaft 5 are installed inside the first bearing 4, a large shaft gland 16 is fixed on the outer side of the first bearing seat by adopting screws, and the large shaft gland 16 plays a role in limiting the axial position of the first bearing 4.
Referring to fig. 4, 5 and 6, the second bearing 6 is installed on the transverse shaft 5, the second bearing 6 is installed inside the second bearing seat 7, 2 second bearings 6 and 2 second bearing seats 7 are arranged on the transverse shaft 5, spacer bushes 17 are arranged between the 2 second bearings 6 and the 2 second bearing seats 7, the spacer bushes 17 are used for limiting the relative movement between the 2 second bearings 6 and the 2 second bearing seats 7, the lower turntable 8 is fixed on the second bearing seat 7 by screws, the second bearing seats 7 can rotate around the transverse shaft 5, and further the lower turntable 8 can be driven to rotate freely around the axis of the transverse shaft 5.
Referring to fig. 1, 2, 4, 5, 6 and 7, a through hole is formed in the middle of the lower rotary table 8, the third bearing seat 9 is installed in the through hole, an ear plate which is matched with the lower rotary table 8 is arranged on the third bearing seat, the third bearing seat 9 is fixed on the lower rotary table 8 by a screw, a third bearing 10 is vertically installed inside the third bearing seat 9, a vertical shaft 11 is installed in the third bearing 10, a fixing plate 18 is installed at the lower end of the vertical shaft 11, and the fixing plate 18 can limit the third bearing seat 9 and the third bearing 10 to move axially along the vertical shaft 11. The upper end of the vertical rotating shaft 11 is a flange plate, the upper rotating table 12 is fixed on the flange plate at the upper end of the vertical rotating shaft 11 through screws, the upper rotating table 12 can perform circular motion around the central axis of the vertical rotating shaft 11, namely the third bearing 10 and the third bearing seat 9 are mutually matched to realize the circular motion of the upper rotating table 12 around the central axis of the vertical rotating shaft 11, so that the left and right sides of the sensor calibration table are oppositely installed, and the left, right, up and down inclination of the sensor calibration table can be realized for angle calibration of the sensor.
Referring to fig. 1, 3, 8 and 9, a sensor calibration table 13 according to an embodiment of the present invention includes a marble base 1301 fixed on an upper surface of an upper turntable 12, a calibration table base 1302 fixed on an upper surface of the marble base 1301, a sensor calibration device 19 fixed on the calibration table base 1302, and a coaxial thermal insulation device 20, wherein a fixing ear base 1303 is disposed on a lower surface of the marble base 1301, a plurality of fixing through holes 201 matched with the fixing ear base 1303 are disposed on a stand 2, the fixing through holes 201 are distributed along an arc on the stand, and the fixing ear bases 1303 are disposed at two ends of the marble base 1301.
Referring to fig. 1, 3, 8 and 10, in the process of rotating the second bearing seat 7 around the transverse rotating shaft 5, the lower rotary table 8 can be driven to rotate freely around the axis of the transverse rotating shaft 5, and thus the sensor calibration device 13 mounted on the lower rotary table 8 can rotate around the axis of the transverse rotating shaft 5. Referring to fig. 1, after the sensor calibration table 13 rotates to a certain angle around the axis of the transverse rotating shaft 5, fixing between the fixing through hole 201 and the fixing ear seat 1303 may be achieved by inserting a fixing pin into the fixing through hole 201 and the fixing ear seat 1303. For example, referring to fig. 1, after the sensor calibration table 13 is rotated to a certain angle around the axis of the transverse rotating shaft 5, the fixing lug 1303 and the first fixing through hole 201 are fixed to each other by using the fixing pin, so that the sensor calibration table 13 can be inclined at an included angle of 30 degrees with respect to the base plate 1, and the inclination angle calibration of the sensor in an inclined state can be realized.
Referring to fig. 1, 2, 8, 9 and 10, a marble base 1301 is fixed on the upper rotary table 12 by screws, a calibration table base 1302 is fixed on the marble base 1301 by screws, the marble base 1301 is made of marble, the marble base 1301 is affected little by temperature, and the influence of temperature change on the calibration accuracy of the sensor can be avoided. Referring to fig. 8, 9 and 10, the sensor calibration device 19 includes a fourth bearing seat 1901 and a fifth bearing seat 1902 fixed on a calibration table base 1302, a turntable tool 1905 whose two ends are respectively installed in the fourth bearing seat 1901 and the fifth bearing seat 1902 by a fourth bearing 1903 and a fifth bearing 1904, a sensor clamp 1906 installed inside the turntable tool 1905, a clamp block 1907 located at two ends of the sensor clamp 1906, a press block 8 installed on a sidewall of the turntable tool 1906, a sixth bearing seat 1909 and a turntable motor seat 1910 fixed on the calibration table base 1302, a turntable motor 1911 fixed on the turntable motor seat 1910, a transmission shaft 1913 connected with an output shaft of the turntable motor 1911 by a connection flange 1912, and a sixth bearing 1914 for fixing the transmission shaft 1913, wherein the transmission shaft 1913 and the turntable tool 1905 are connected with each other by a coupling 1915, the sixth bearing 1914 is installed in the sixth bearing seat 1909, the pressing block 1908 and the clamping block 1907 are matched with each other to fix the sensor clamp 1906 in the turntable tool 1905, and the sensor clamp 1906 fixes the sensor to be calibrated in the turntable tool 1905.
Specifically, referring to fig. 1, fig. 2, fig. 8, fig. 9 and fig. 10, a fourth bearing seat 1901 and a fifth bearing seat 1902 are fixed on the upper surface of the calibration table base 1302 by screws, so as to provide support for the turntable tool. The fourth bearing 1903 and the fifth bearing 1904 are respectively fixed in the fourth bearing seat 1901 and the fifth bearing seat 1902, the fourth bearing 1903 and the fifth bearing 1904 adopt rolling bearings, and two ends of the turntable tool 1905 are respectively installed in inner rings of the rolling bearings, so that the turntable tool 1905 driven by external force can rotate. The turntable tool 1905 uses a turntable motor 1911 as external power to rotate, and the turntable motor 1911 is high in coaxial installation accuracy and convenient to install. The output shaft of the turntable motor 1911 is connected to a drive shaft 1913 by two split connecting flanges 1912, and the drive shaft 1913 drives the turntable tool 1905 by a coupling 1915.
The turntable tool 1905 of the embodiment of the invention is made of titanium alloy T34, the turntable tool 1905 made of titanium alloy has the characteristics of high strength, low expansion coefficient, low heat conductivity coefficient, no magnetism and the like, a plurality of heat flow holes 19051 are formed in the inner wall of the turntable tool 1905, and the arrangement of the heat flow holes 19051 can ensure that the heat of the coaxial heat preservation device 20 can be smoothly transmitted to the sensor to be calibrated. Referring to fig. 8, 9 and 10, the turntable tool 1905 is a hollow shaft component, and the heat flow holes 19051 are symmetrically formed in the side wall of the turntable tool, so that convection in the up-down direction, the front-back direction and the like can be formed, the heat of the coaxial heat preservation device 20 can be smoothly transferred to the sensor to be calibrated, uniform temperature distribution in the turntable tool 1905 can be realized, and the influence of the temperature distribution on the calibration precision of the sensor can be avoided. The left end of the turntable tool 1905 is provided with a coaxial connecting flange 1916 and a conductive slip ring 1917, wherein the conductive slip ring 1917 is fixed to the left end of the coaxial connecting flange 1916 by screws. The structure of the conductive slip ring 1917 is an inner ring and an outer ring, the inner ring is fixed on a shaft of the coaxial connecting flange 1906, the outer ring and the inner ring are in sliding contact, the outer layer is connected with electricity, in the rotating process of the turntable tool, the inner ring rotates along with the turntable tool, the outer ring is in a static state, the inner ring and the outer ring in sliding contact can conduct electricity continuously, and therefore stable continuous power supply to the rotating turntable tool is achieved, and sensor calibration in a rotating state is achieved.
Referring to fig. 1, 5, 8, 9 and 11, a coaxial thermal insulation device 20 according to an embodiment of the present invention includes a coaxial inner cylinder 2001 and a coaxial outer cylinder 2002 which are concentrically arranged, a coaxial inner plate 2003 fixed to an end of the coaxial inner cylinder 2001, a coaxial outer plate 2004 fixed to an end of the coaxial outer cylinder 2002, and a head 2005 fixed to the coaxial inner plate 2003 and the coaxial outer plate 2004, wherein a through hole 2008 for installing a turntable tool 1905 is provided in a middle portion of the head 2005. The turntable tool 1905 is installed in the inner cavity of the coaxial inner cylinder 2001, a nonmetal heating belt is wound on the outer wall of the coaxial inner cylinder 2001 and located in an annular space between the coaxial outer cylinder 2002 and the coaxial inner cylinder 2001, the turntable tool 1905 and a sensor to be calibrated installed in the coaxial inner cylinder 2001 can be heated after the nonmetal heating belt is electrified, and the nonmetal heating belt is made of nonmetal materials, so that a magnetic field cannot be generated in the heating process, and the influence on the calibration accuracy of the sensor is avoided.
Referring to fig. 8, 9 and 11, the outer circle of the coaxial inner plate 2003 is fixed on the coaxial inner cylinder 2001 by screws, the coaxial inner plates 2003 are arranged at both ends of the coaxial inner cylinder 2001, that is, one coaxial inner cylinder 2001 and 2 coaxial inner plates 2003 are matched with each other to form an inner cylinder assembly, the inner cylinder assembly is integrally fixed on the coaxial outer plate 2004 by screws, the ends 2005 are arranged at both ends of the coaxial heat preservation device 20, the ends 2005 are fixed on the coaxial outer plate 2004 by screws, and the outer side of the coaxial outer plate 2004 is inserted into the coaxial outer cylinder 2002 and fastened by screws. The end heads 2005 at the two ends of the coaxial heat preservation device 20 are supported and fixed by using support frames, that is, the support frame 2006 is fixedly arranged on the calibration table base 1302, the coaxial outer side plate 2002 is fixed on the support frame 2006 by using screws, a shaft sleeve 2007 is arranged between the support frame 2006 and the end heads 2005, and the lower end of the support frame 2006 is fixed on the calibration table base 1302 by using screws. The two ends of the turntable tool 1905 penetrate through the shaft sleeve 2007, and the turntable tool 1905 can rotate relative to the support frame 2006. The coaxial heat preservation device 20 is fixed on the upper surface of the calibration table base 1302 by the support frame 2006, the lower portion of the support frame 2006 is provided with a T-shaped foot, a screw hole is formed in the T-shaped foot, the T-shaped foot is installed on the calibration table base 1302 through a screw, a semicircular notch is formed in the upper side of the support frame 2006, the diameter of the semicircular notch is the same as that of the end 2005, the end 2005 at two ends of the assembled coaxial heat preservation device 20 is clamped in the semicircular notch of the support frame 2006, and then the support frame 2006 can support and fix two ends of. The coaxial outer cylinder 2002 of the coaxial heat preservation device 20 has a heat preservation function, and can be in a constant temperature state in the calibration process of the sensor to be calibrated by matching with the coaxial inner cylinder 2001, and the influence of temperature distribution on the calibration precision of the sensor to be calibrated can be reduced even if the sensor to be calibrated rotates in the calibration process.
Referring to fig. 8, 10 and 11, in the embodiment of the present invention, a snap ring 2011 is disposed on an outer wall of the coaxial outer cylinder 2002, a side hole 2010 is disposed on the coaxial outer cylinder 2002, a rubber plug 2009 is disposed in the side hole 2010, and the side hole 2010 penetrates through the coaxial outer cylinder 2003 and the coaxial inner cylinder 2001. Referring to fig. 8, 9 and 10, the outer surfaces of both ends of the clamp piece 1907 are set to be conical surfaces 19071, the inner surface of the clamp piece 1907 is provided with a boss 19072, the outer surface of the sensor clamp 1906 is provided with a groove 19061 which is matched with the boss 19072, the boss 19072 is installed in the groove 19061, the press piece 1908 is fixed on the turntable tool 1905 by using an inner hexagonal pointed bolt 1918, the lower end of the press piece 1908 abuts against the outer surface of the clamp piece 1907, and the lower end of the inner hexagonal pointed bolt 1918 abuts against the conical surface. The sensor to be calibrated 21 is installed in an inner cavity of the sensor clamp 1906 by using screws, the sensor clamp 1906 is cylindrical, the inner part of the sensor clamp 1906 is a hollow structure and used for fixing the sensor to be calibrated 21, two ends of the sensor clamp 1906 are respectively clamped by two clamping blocks 1907, the clamping blocks 1907 are arc-shaped bearing bush structures, and the outer surfaces of two ends of each clamping block 1907 are set to be conical surfaces 19071 so that the clamping blocks can be conveniently installed in the inner cavity of the turntable tool 1905. Referring to fig. 5, a corresponding pillow block may be machined into the inner bore of the turret tool 1905 to limit the position of the clamp 1907. The turntable tool 1905 is provided with a mounting hole, the pressing block 1908 can be mounted in the mounting hole, the lower end of the pressing block 1908 abuts against the outer surface of the clamping block 1907, the pressing block 1908 is fixed on the turntable tool 1905 through the hexagon socket head cap bolt 1918, the lower end of the hexagon socket head cap bolt 1918 abuts against the conical surface, and the fixing reliability of the clamping block can be improved through mutual matching, so that the reliable positioning of the sensor in the calibration process is realized, and the calibration precision of the sensor is prevented from being influenced due to unreliable positioning. Illustratively, the hexagon socket head cap bolt 1918 may be screwed through a side hole 2010 provided on the coaxial outer cylinder 2002 of the coaxial thermal insulation device so as to compress the clamp block 1907 to prevent it from moving freely, and a rubber plug 2009 is fitted into the side hole 2010 to seal after screwing.
The high-precision non-magnetic-rate turntable is used for dynamic calibration of a dynamic directional sensor, a dynamic measurement sensor to be calibrated is arranged in an inner cavity of a sensor clamp 1906, the sensor 21 to be calibrated is connected with a test computer through a conductive slip ring 1917, and a turntable motor 1911 rotates under the control of test upper computer software according to a set rotating speed. For example, the inclination angle of the calibration table base 1302 may be set to 90 degrees (that is, the angle shown in fig. 4), the rotation speed of the turntable motor 1911 is set according to the rotation speed required by the calibration, the turntable motor 1911 is started to drive the turntable tool 1905 to rotate, the angle and the rotation speed data output by the sensor 21 to be calibrated are recorded after the rotation speed of the turntable motor 1911 is stabilized, the rotation speed of the turntable motor 1911 is changed after the recording is completed, the angle and the rotation speed data output by the sensor 21 to be calibrated are recorded again, and so on, the data of all the rotation speed points to be calibrated are collected. The acquired rotation speed and angle data are compared with the set inclination angle of the calibration table base 1302 (for example, adjusted to the inclination angle shown in fig. 1) and the rotation speed set by the turntable motor 1911, and a calibration coefficient is obtained through calculation and sent to the sensor 21 to be calibrated, so as to calibrate the sensor 21 to be calibrated.
After the power is supplied again, the turntable motor 1911 is started, the rotating speed different from the previous steps is set, the output angle and the rotating speed data of the sensor 21 to be calibrated are recorded by repeating the above processes, the rotating speed and the rotating speed data are compared with the set rotating speed and the rotating angle of the turntable motor 1911, the error is in the required range, and the successful calibration is indicated. Different inclination angles and different rotating speeds are respectively set for testing, the angle and rotating speed data output by the dynamic measurement orientation sensor are recorded and compared with the set angle and rotating speed, and whether the angle and rotating speed data output by the sensor to be calibrated 21 are accurate or not is observed.
The embodiment of the invention provides a calibration table base of a high-precision non-magnetic-rate rotary table, which is arranged on marble foundation stones, the marble foundation stones are influenced by environmental temperature to have extremely small deformation, the influence of the environmental temperature on the foundation bases is avoided, and the influence of the environmental temperature on the calibration precision of a sensor is reduced The sensor calibration with high rotating speed and high temperature is realized by providing the coaxial heat preservation device without the magnetic environment to eliminate the influence of the magnetic environment on the sensor calibration precision.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.
Claims (9)
1. A high-precision turntable without magnetic velocity is characterized by comprising a bottom plate, a vertical table fixed on the bottom plate, a first bearing seat fixed at the upper end of the vertical table, a transverse shaft rotatably installed in the first bearing seat by adopting a first bearing, a second bearing seat installed on the transverse shaft by adopting a second bearing, a lower turntable fixed at the upper end of the second bearing seat, a third bearing seat fixed on the lower turntable, a vertical shaft installed in the third bearing seat by adopting a third bearing, an upper turntable fixed on the vertical shaft, and a sensor calibration table fixed on the upper turntable, wherein the sensor calibration table comprises a marble base fixed on the upper surface of the upper turntable, a calibration table base fixed on the upper surface of the marble base, a sensor calibration device fixed on the calibration table base and a coaxial heat preservation device, the lower surface of the marble base is provided with a fixing lug seat, the stand is provided with a plurality of fixing through holes matched with the fixing lug seat, the fixing through holes are distributed on the stand along an arc, and the fixing lug seats are arranged at two ends of the marble base; the coaxial heat preservation device comprises a coaxial inner cylinder and a coaxial outer cylinder which are concentrically arranged, a coaxial inner side plate fixed at the end part of the coaxial inner cylinder, a coaxial outer side plate fixed at the end part of the coaxial outer cylinder, and an end fixed on the coaxial inner side plate and the coaxial outer side plate, wherein a through hole used for installing a rotary table tool is formed in the middle of the end.
2. The high-precision rotation platform without magnetic velocity according to claim 1, wherein the sensor calibration device comprises a fourth bearing seat and a fifth bearing seat fixed on the calibration platform base, a rotation platform tool with two ends respectively installed in the fourth bearing seat and the fifth bearing seat by a fourth bearing and a fifth bearing, a sensor fixture installed inside the rotation platform tool, clamping blocks located at two ends of the sensor fixture, a pressing block installed on the side wall of the rotation platform tool, a sixth bearing seat and a rotation platform motor seat fixed on the calibration platform base, a rotation platform motor fixed on the rotation platform motor seat, a transmission shaft connected with an output shaft of the rotation platform motor by a connecting flange, and a sixth bearing for fixing the transmission shaft, wherein the transmission shaft and the rotation platform tool are connected with each other by a coupling, the sixth bearing is installed in the sixth bearing seat, the pressing block and the clamping block are matched with each other to fix the sensor clamp in the rotary table tool, and the sensor clamp fixes a sensor to be calibrated in the rotary table tool.
3. The high-precision non-magnetic-rate rotary table according to claim 2, wherein the rotary table tool is a hollow rotary shaft, a heat flow hole is formed in the inner wall of the rotary table tool, a coaxial connecting flange and a conductive sliding ring are mounted at the left end of the rotary table tool, and the conductive sliding ring is fixed at the left end of the coaxial connecting flange through a screw.
4. The high-precision no-magnetic-rate turntable according to claim 3, wherein a snap ring is arranged on the outer wall of the coaxial outer cylinder, a side hole is arranged on the coaxial outer cylinder, a rubber plug is arranged in the side hole, and the side hole penetrates through the coaxial outer cylinder and the coaxial inner cylinder.
5. The high accuracy magnetic rate free turntable of claim 4, wherein said coaxial outer plate is fixed to the end of said coaxial outer cylinder by screws, said coaxial inner plate is fixed to the end of said coaxial inner cylinder by screws, said end is fixed to said coaxial outer plate by screws, and a non-metallic heating tape is wound around the outer wall of said coaxial inner cylinder and is located in the annular space between said coaxial outer cylinder and said coaxial inner cylinder.
6. The high-precision no-magnetic-rate turntable according to claim 5, wherein a support frame is fixedly arranged on the calibration table base, the coaxial outer side plate is fixed on the support frame by using screws, a shaft sleeve is arranged between the support frame and the end, and the lower end of the support frame is fixed on the calibration table base by using screws.
7. The high-precision turntable without magnetic velocity according to claim 6, wherein 2 of the vertical platforms are oppositely arranged on the bottom plate, a support rod is arranged between the two vertical platforms, two ends of the support rod are fixed on the vertical platforms by adopting open cushions matched with hexagon socket head cap screws, and the bottom of the vertical platform and the bottom plate are reinforced by adopting an angle connecting piece.
8. The high-precision no-magnetic-rate turntable according to claim 7, wherein the first bearing is mounted in the first bearing seat, the first bearing seat is fixed at the upper end of the vertical table by screws, a large bearing cover for limiting the axial position of the first bearing is fixed on the outer side of the first bearing seat, a spacer sleeve for limiting the axial movement of the second bearing seat is arranged on the inner side of the first bearing seat, and a fixing plate for limiting the axial movement of the third bearing seat and the third bearing is arranged at the lower end of the vertical shaft.
9. The high-precision turntable without magnetic velocity according to claim 8, wherein the outer surfaces of the two ends of the clamping block are conical surfaces, the inner surface of the clamping block is provided with a boss, the outer surface of the sensor fixture is provided with a groove matched with the boss, the boss is installed in the groove, the pressing block is fixed on the turntable tool by adopting an inner hexagonal pointed bolt, the lower end of the pressing block abuts against the outer surface of the clamping block, and the lower end of the inner hexagonal pointed bolt abuts against the conical surface.
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| CN113059367B (en) * | 2021-03-31 | 2022-03-01 | 台丽精密机床(温州)有限公司 | Four-axis revolving stage has adjustment mechanism's hydraulically operated fixture for digit control machine tool |
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| CN111623817A (en) | 2020-09-04 |
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