CN110370085B - Improved ball arm instrument device based on laser ranging - Google Patents
Improved ball arm instrument device based on laser ranging Download PDFInfo
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- CN110370085B CN110370085B CN201910670203.4A CN201910670203A CN110370085B CN 110370085 B CN110370085 B CN 110370085B CN 201910670203 A CN201910670203 A CN 201910670203A CN 110370085 B CN110370085 B CN 110370085B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q17/00—Arrangements for observing, indicating or measuring on machine tools
- B23Q17/24—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves
- B23Q17/2452—Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves for measuring features or for detecting a condition of machine parts, tools or workpieces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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Abstract
An improved ball bar instrument device based on laser ranging further comprises a static magnetic ball, a laser ranging mechanism, a telescopic part, a reflecting part, a three-point measuring mechanism and an adjusting part for adjusting the distance between the static magnetic ball and the three-point measuring mechanism, wherein one side of the static magnetic ball is connected with the adjusting part, and the other side of the static magnetic ball is adsorbed on the magnetic bowl seat; one side of the adjusting part, which is far away from the static magnetic ball, the laser ranging mechanism, the telescopic part, the reflecting part and the three-point measuring mechanism are sequentially connected; the three-point measuring mechanism is sleeved outside the high-precision ball of the machine tool to be measured, and performs interpolation motion along with the high-precision ball; one end of the reflecting part is embedded in one end of the telescopic part, which deviates from the laser ranging mechanism; the three-point measuring mechanism can drive the reflecting part to do interpolation motion along with the high-precision ball. The invention can carry out precision measurement in the full space range, has high accuracy of measurement precision and improves the measurement accuracy of the precision of the numerical control machine tool.
Description
Technical Field
The invention relates to the field of error detection of numerical control machine tools, in particular to an improved ball arm instrument device based on laser ranging.
Background
Machine tools are machine tools in the machine manufacturing industry, and the precision of the machine tools directly influences the level of the manufacturing industry. The relevant data show that more than 80% of machine tools have to be debugged on site to reach the technical index when being installed, and the machine tools need to be regularly checked after being used for a period of time to ensure the normal working state of the machine tools. The ball bar instrument is an instrument capable of rapidly, conveniently and economically detecting the precision of a numerical control machine tool, is proposed by James B.Bryan of Lawrence Livermore National Laboratory (LLNL) in 1982, is widely applied to the evaluation and diagnosis of the precision of a machine tool, and has been adopted as a standard tool for detecting circular motion of the machine tool and detecting the precision by ISO230, ASMEB5.54 and the like. And then some enterprises and scholars have conducted intensive research on the club instrument and developed several different types of club instruments. In order to meet the requirements of different measuring space ranges, the ball rod instruments are usually provided with a plurality of rods with different lengths at the same time, but the extension range is limited, and in addition, the circular track radius of the measuring space of the existing ball rod instrument is basically unchanged, so that all space areas in the working stroke range of a machine tool cannot be covered.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the utility model provides an improved generation club appearance device based on laser rangefinder overcomes the defect that club appearance can't cover the lathe work stroke scope completely among the prior art to improve the measurement accuracy of club appearance.
In order to solve the technical problems, the invention adopts the technical scheme that:
an improved ball arm instrument device based on laser ranging comprises a magnetic bowl seat and a workbench, wherein the magnetic bowl seat is fixedly arranged on the workbench, the improved ball arm instrument device further comprises a static magnetic ball, a laser ranging mechanism, a telescopic part, a reflecting part, a three-point measuring mechanism and an adjusting part for adjusting the distance between the static magnetic ball and the three-point measuring mechanism, one side of the static magnetic ball is connected with the adjusting part, and the other side of the static magnetic ball is adsorbed on the magnetic bowl seat;
one side of the adjusting part, which is far away from the static magnetic ball, the laser ranging mechanism, the telescopic part, the reflecting part and the three-point measuring mechanism are sequentially connected;
the three-point measuring mechanism is used for being sleeved outside a high-precision ball of a machine tool to be measured;
one end of the reflecting part is embedded in one end of the telescopic part, which is far away from the laser ranging mechanism, so that light from the laser ranging mechanism is reflected back to the laser ranging mechanism in the telescopic part;
the three-point measuring mechanism drives the reflecting part to do interpolation motion along with the motion of the high-precision ball, so that the displacement change of the reflecting part on the motion track is fed back to the laser ranging mechanism.
The invention has the beneficial effects that: the ball bar instrument is provided with the adjusting part which is used for adjusting the distance between the three-point distance measuring mechanism and the static magnetic ball before measurement, and the distance is fixed after measurement, and the telescopic part can be adaptively telescopic according to the adjusting length of the adjusting part, so that the ball bar instrument can meet the requirements of different measuring space ranges; the laser ranging mechanism and the reflecting part are arranged, and laser ranging is carried out by utilizing the principle of laser reflection so as to measure radial variation values of different positions on the circumference, thereby obtaining the running precision of the machine tool to be measured; the three-point measuring mechanism is arranged to measure the displacement of the high-precision ball and further improve the measuring accuracy; the invention provides a ball rod instrument capable of completely covering the working stroke range of a machine tool, which is high in measurement precision.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a diagram of the laser path in the present invention;
FIG. 3 is a schematic structural diagram of a three-point measuring mechanism according to the present invention;
FIG. 4 is a diagram showing a travel path of the cue instrument of the present invention.
Description of reference numerals:
1. a magnetic bowl base;
3. a static magnetic ball;
4. a laser ranging mechanism; 41. an annular housing; 42. a beam splitter; 411. a reflective cavity; 412. a laser receiving cavity; 4111. a laser inlet; 4112. a laser outlet;
5. a telescopic part;
6. a reflection section; 61. a protective shell; 62. a mirror;
7. a three-point measuring mechanism; 71. sleeving a ring; 72. a displacement sensor;
8. an adjustment section; 81. lengthening a rod; 82. a lengthening bar housing;
9. a high-precision ball;
10. a joint; 101. a bearing; 102. a shaft seat;
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1-4, an improved ball bar instrument device based on laser ranging comprises a magnetic bowl base 1 and a workbench, wherein the magnetic bowl base 1 is fixedly arranged on the workbench, the improved ball bar instrument device further comprises a static magnetic ball 3, a laser ranging mechanism 4, a telescopic part 5, a reflecting part 6, a three-point measuring mechanism 7 and an adjusting part 8 for adjusting the distance between the static magnetic ball and the three-point measuring mechanism, one side of the static magnetic ball 3 is connected with the adjusting part 8, and the other side of the static magnetic ball is adsorbed on the magnetic bowl base 1;
one side of the adjusting part 8, which is far away from the static magnetic ball 3, the laser ranging mechanism 4, the telescopic part 5, the reflecting part 6 and the three-point measuring mechanism 7 are sequentially connected;
the three-point measuring mechanism 7 is used for being sleeved outside a high-precision ball 9 of a machine tool to be measured;
one end of the reflecting part 6 is embedded at one end of the telescopic part 5, which is far away from the laser ranging mechanism 4, so that the light rays from the laser ranging mechanism 4 are reflected back to the laser ranging mechanism 4 in the telescopic part 5;
the three-point measuring mechanism 7 drives the reflecting part 6 to do interpolation motion along with the motion of the high-precision ball 9, so that the displacement change of the reflecting part 6 on the motion track is fed back to the laser ranging mechanism 4.
The working principle of the invention is as follows:
1. sleeving the three-point measuring mechanism on a high-precision ball of the machine tool, adjusting the length of the adjusting part before the ball bar instrument runs, fixing the length of the adjusting part, and adaptively adjusting the distance between the three-point measuring mechanism and the adjusting part by the telescopic part;
2. the high-precision ball is moved in an interpolation mode through operation, laser enters the laser ranging mechanism, penetrates through the telescopic portion to reach the reflecting portion, is reflected to the laser ranging mechanism through the reflecting portion, and the laser ranging mechanism sends measured data to the computer for data analysis to obtain a displacement change value of the high-precision ball, and therefore the precision of the high-precision ball is obtained.
From the above description, the beneficial effects of the present invention are: the ball bar instrument is provided with the adjusting part which is used for adjusting the distance between the three-point distance measuring mechanism and the static magnetic ball before measurement, and the distance is fixed after measurement, and the telescopic part can be adaptively telescopic according to the adjusting length of the adjusting part, so that the ball bar instrument can meet the requirements of different measuring space ranges; the laser ranging mechanism and the reflecting part are arranged, and laser ranging is carried out by utilizing the principle of laser reflection so as to measure radial variation values of different positions on the circumference, thereby obtaining the running precision of the machine tool to be measured; the three-point measuring mechanism can measure the displacement of the high-precision ball and further improve the measuring accuracy.
Furthermore, the reflection part 6 is connected with the three-point measuring mechanism 7 through a movable joint 10.
As can be seen from the above description, the provision of the movable joint between the reflection portion and the three-point measuring mechanism can increase the flexibility between the reflection portion and the three-point measuring mechanism.
Further, the joint 10 includes a bearing 101 and a shaft seat 102, and the reflection part 6, the bearing 101, the shaft seat 102 and the three-point measuring mechanism 7 are connected in sequence, wherein the shaft seat 102 penetrates through one end of the bearing 101.
As can be seen from the above description, the bearing and the shaft seat are arranged, so that the reflecting part and the three-point measuring mechanism can rotate at multiple angles, and the flexibility between the reflecting part and the three-point measuring mechanism is improved.
Further, the three-point measuring mechanism 7 includes a ring sleeve 71 and a plurality of displacement sensors 72, the ring sleeve 71 can be clamped outside the high-precision ball 9 to perform interpolation motion along with the motion of the high-precision ball 9;
the plurality of displacement sensors 72 are uniformly distributed on the outer side of the ring sleeve 71, and the outer side wall of the ring sleeve 71 is connected with the reflecting part 6 through the joint 10.
According to the above description, the plurality of displacement sensors are uniformly distributed on the outer side of the ring sleeve, and when the high-precision ball performs circular interpolation motion, the feeding speed of the circular motion can be obtained through analysis of the measurement data of the displacement sensors.
Further, the laser ranging mechanism 4 comprises an annular housing 41, a laser range finder, a wireless transmission module and a beam splitter 42, wherein a reflection cavity 411 and a laser receiving cavity 412 are arranged in the annular housing 41, a laser inlet 4111 is formed in the side wall of the reflection cavity 411, and a laser outlet 4112 is formed in one side of the reflection cavity 411, which is perpendicular to the laser inlet 4111;
the laser outlet 4112 is connected with one end of the telescopic part 5;
the laser receiving chamber 412 side of the annular housing 41 is connected to the adjustment portion 8;
the beam splitter 42 is obliquely installed in the reflective cavity 411 to refract the light from the laser inlet to the reflective part 6;
the laser range finder is arranged in the laser receiving cavity 412, a gap is reserved between the spectroscope 42 and the bottom of the reflecting cavity 411, and laser penetrates through the gap and enters the laser range finder;
the wireless transmission module is installed in the laser receiving cavity 412 and electrically connected with the laser range finder.
As can be seen from the above description, the wireless transmission module is used to wirelessly transmit the laser measurement data to the computer for analyzing the measurement data, and the spectroscope is obliquely disposed to enable the laser to be transmitted in two directions, wherein one transmission direction is transmitted to the reflection portion.
Further, the laser range finder includes a timer and a laser receiver facing the reflection part 6 to receive the laser reflected by the reflection part 6;
the timer is electrically connected with the laser receiver to calculate the time length of the laser reflection process.
According to the description, the laser receiver is electrically connected with the timer, so that when laser enters the laser receiver, the timer stops timing to obtain the time length of the laser reflection process, and the time of the laser reflection process can be accurately obtained.
Further, the reflecting part 6 comprises a protective shell 61 with an opening at one side and a reflecting mirror 62, the opening side of the protective shell 61 faces the laser range finder and is connected with the telescopic part 5, and the side of the protective shell 61 departing from the opening side is connected with the three-point measuring mechanism 7;
the reflector 62 is installed on the inner wall of the protective shell 61 and faces the laser range finder to reflect laser to the laser range finder.
As can be seen from the above description, the mirror is capable of reflecting the laser light into the laser rangefinder.
Furthermore, the adjusting part 8 comprises a fastening piece, an extension bar 81 and an extension bar housing 82, the extension bar housing 82 is sleeved outside the extension bar 81, a guide rail is arranged on the inner side wall of the extension bar housing 82, and the extension bar 81 is arranged on the guide rail through a sliding block matched with the guide rail, so that the extension bar can relatively slide in the extension bar housing;
a fastener is passed through extension housing 82 and pressed against extension 81 to secure extension 81 after it is adjusted to the appropriate length.
According to the description, the extension bar shell is sleeved outside the extension bar, the distance between the three-point distance measuring mechanism and the static magnetic ball can be adjusted, the ball bar instrument can completely cover the requirements of meeting different measuring space ranges, the position of the extension bar can be fixed by the fastening piece, and the guide rail and the sliding block are used for improving the smoothness of relative sliding between the extension bar and the extension bar shell.
Further, the telescopic part 5 is an elastic telescopic sleeve.
As can be seen from the above description, the arrangement of the elastic telescopic sleeve can increase the adaptability of the cue stick instrument to the measurement space range.
The working principle of the invention is analyzed as follows:
when the ball bar instrument is inclined and measured, assuming that the length measured by the laser distance measuring mechanism is l, the length of the ball bar instrument device actually changes when the ball bar instrument device does circular motion by taking the static magnetic ball of the workbench as the center:
L＝lcosθ (1)
referring to fig. 1 and 4, when the high-precision ball has Z-axis error, the three-point measuring mechanism will vertically displace along with the high-precision ball, the adjusting part to the telescopic part will incline with the horizontal plane at an angle theta, and the change of the radial length of the ball rod instrument can still be accurately measured when the ball rod instrument makes circular motion by taking the static magnetic ball of the workbench as the center.
The rotation angle of the ball rod instrument can be obtained by calculating the sampling time of the computer and the circumferential feeding speed when the machine tool performs circumferential interpolation motion, the circumferential feeding speed is measured by a displacement sensor, and the measurement data of the displacement sensor is transmitted to the computer in a wireless transmission mode.
The ball rod instrument is easy to realize error measurement in all motion space ranges, and the center coordinate O (x) of the circular arc track of the ball rod instrument is set0,y0,z0) And (x, y, z) is an actual coordinate on the circular arc track of the club instrument, and theoretically, the coordinate T '(x', y ', z') of each point of the circular arc track can be represented as follows:
the relation between the circle center O and the actual position P is as follows:
(R+ΔR)2＝(x-x0)2+(y-y0)2+(z-z0)2 (3)
r is the actual club length of the club instrument, and Delta R is the error.
Substituting (1) into (2) and calculating the partial derivative can obtain:
(R+ΔR)dR＝(x'+Δx-x0)dx+(y'+Δy-y0)dy+(z'+Δz-z0)dz (4)
replace (3) by the error amount:
RΔR＝(x'-x0)Δx+(y'-y0)Δy+(z'-z0)Δz (5)
therefore, the relationship between the total error Δ R and the error components Δ x, Δ y, Δ z of the movement axes measured by the cue instrument can be expressed as formula (4). Taking the experimental process of the cue instrument on the XY plane as an example, the influence of the error component in the Z-axis direction is not considered, and the relationship of the comprehensive error and the error component is expressed as follows:
RΔR＝(x'-x0)Δx+(y'-y0)Δy (6)
the comprehensive error models of the ball bar instrument on the ZX plane and the YZ plane are respectively as follows:
RΔR＝(x'-x0)Δx+(z'-z0)Δz (7)
RΔR＝(y'-y0)Δy+(z'-z0)Δz (8)
(6) equations (7), (8) and (7) are basic equations of the measurement device of the cue stick instrument, and reflect the relationship between the measurement result and the error vector. All Δ R are measured and all roundness error curves are made. And the parameter indexes of perpendicularity, repeatability, clearance, servo gain proportion matching, servo performance, periodic error of a lead screw and the like of each shaft of the numerical control machine can be reflected from a roundness error curve.
Referring to fig. 1 to 4, a first embodiment of the present invention is:
an improved ball arm instrument device based on laser ranging comprises a magnetic bowl seat 1 and a workbench, wherein the magnetic bowl seat 1 is fixedly arranged on the workbench, the improved ball arm instrument device further comprises a static magnetic ball 3, a laser ranging mechanism 4, a telescopic part 5, a reflecting part 6, a three-point measuring mechanism 7 and an adjusting part 8 for adjusting the distance between the static magnetic ball and the three-point measuring mechanism, one side of the static magnetic ball 3 is connected with the adjusting part 8, and the other side of the static magnetic ball is adsorbed on the magnetic bowl seat 1;
one side of the adjusting part 8, which is far away from the static magnetic ball 3, the laser ranging mechanism 4, the telescopic part 5, the reflecting part 6 and the three-point measuring mechanism 7 are sequentially connected;
the three-point measuring mechanism 7 is used for being sleeved outside a high-precision ball 9 of a machine tool to be measured;
one end of the reflecting part 6 is embedded at one end of the telescopic part 5, which is far away from the laser ranging mechanism 4, so that the light rays from the laser ranging mechanism 4 are reflected back to the laser ranging mechanism 4 in the telescopic part 5;
the three-point measuring mechanism 7 drives the reflecting part 6 to do interpolation motion along with the motion of the high-precision ball 9, so that the displacement change of the reflecting part 6 on the motion track is fed back to the laser ranging mechanism 4;
preferably, the laser distance measuring mechanism 4 is connected with the adjusting part 8 through threads;
referring to fig. 1 and 2, the reflection portion 6 is connected to the three-point measuring mechanism 7 by a movable joint 10.
Referring to fig. 2, the joint 10 includes a bearing 101 and a shaft seat 102, and the reflection part 6, the bearing 101, the shaft seat 102 and the three-point measuring mechanism 7 are connected in sequence, wherein the shaft seat 102 penetrates one end of the bearing 101.
Referring to fig. 1 and 3, the three-point measuring mechanism 7 includes a ring sleeve 71 and a plurality of displacement sensors 72, and the ring sleeve 71 can be clamped outside the high-precision ball 9 to perform interpolation motion along with the motion of the high-precision ball 9;
the plurality of displacement sensors 72 are uniformly distributed on the outer side of the ring sleeve 71, and the outer side wall of the ring sleeve 71 is connected with the reflecting part 6 through the joint 10;
preferably, the number of the displacement sensors is 3;
specifically, each two displacement sensors are arranged around the ring sleeve 71 at an angle of 120 degrees to measure the displacement of the high-precision ball, and the measurement precision can be improved;
specifically, a first Bluetooth transmission module is arranged on the outer side of the ring sleeve, and the three displacement sensors are all electrically connected with the first Bluetooth transmission module so as to transmit the measurement data of the displacement sensors to the first Bluetooth transmission module;
preferably, the shaft seat 102 is fixed on the ring sleeve 71 through a locking screw;
referring to fig. 2, the laser ranging mechanism 4 includes an annular housing 41, a laser range finder, a wireless transmission module and a beam splitter 42, a reflective cavity 411 and a laser receiving cavity 412 are disposed in the annular housing 41, a laser inlet 4111 is disposed on a side wall of the reflective cavity 411, and a laser outlet 4112 is disposed on a side of the reflective cavity 411 perpendicular to the laser inlet 4111;
the laser outlet 4112 is connected with one end of the telescopic part 5;
the laser receiving chamber 412 side of the annular housing 41 is connected to the adjustment portion 8;
the beam splitter 42 is obliquely installed in the reflective cavity 411 to refract the light from the laser inlet to the reflective part 6;
the laser range finder is arranged in the laser receiving cavity 412, a gap is reserved between the spectroscope 42 and the bottom of the reflecting cavity 411, and laser penetrates through the gap and enters the laser range finder;
the wireless transmission module is installed in the laser receiving cavity 412 and electrically connected with the laser range finder.
Preferably, the wireless transmission module is a second bluetooth transmission module;
specifically, the measurement precision of the laser distance measuring mechanism 4 can reach +/-0.01 mm, when the ball rod instrument performs circular motion by taking the static magnetic ball 3 as a center and performs interpolation motion along with the high-precision ball of the numerical control machine, the total length variation of the adjusting part and the telescopic part is accurately recorded by the laser distance measuring mechanism 4 and is sent to a computer by the wireless transmission module for data analysis;
referring to fig. 2, the laser rangefinder includes a timer and a laser receiver facing the reflection part 6 to receive the laser reflected by the reflection part 6;
the timer is electrically connected with the laser receiver to calculate the time length of the laser reflection process.
Referring to fig. 2, the reflection part 6 includes a protective case 61 having an opening on one side and a reflection mirror 62, the open side of the protective case 61 faces the laser distance meter and is connected to the telescopic part 5, and the side of the protective case 61 facing away from the open side thereof is connected to the three-point measuring mechanism 7;
the reflector 62 is arranged on the inner wall of the protective shell 61 and faces the laser range finder to reflect the laser to the laser range finder;
specifically, referring to fig. 2, laser enters the reflection cavity 411 from the laser inlet 4111, after being reflected by the beam splitter 42, the laser passes through the inner cavity of the telescopic part and reaches the reflection mirror 62, the laser is reflected by the reflection mirror 62 and then reflected to the laser ranging mechanism 4 along a light path parallel to the original light path, the laser ranging mechanism receives the laser by the laser ranging instrument, the time from the emitting to the receiving of the laser is measured by the timer, the distance is calculated, and the laser ranging mechanism is connected with the computer through the bluetooth module, so that the measured data are transmitted to the computer.
Referring to fig. 1 and 2, the adjusting portion 8 includes a fastening member, an extension bar 81 and an extension bar housing 82, the extension bar housing 82 is sleeved outside the extension bar 81, a guide rail is installed on an inner side wall of the extension bar housing 82, and the extension bar 81 is installed on the guide rail through a sliding block matched with the guide rail, so that the extension bar can relatively slide in the extension bar housing;
the fastener passes through the extension bar housing 82 and presses against the extension bar 81 to fix the extension bar 81 after the extension bar is adjusted to a proper length;
preferably, the extension bar 81 and the extension bar housing 82 can slide relatively through a slide block and a guide rail, and the extension range is 0 mm-600 mm;
the expansion part 5 is an elastic expansion sleeve.
Preferably, the initial length of the telescopic sleeve is 60mm, the maximum extension length of the telescopic sleeve is 30mm, and the maximum compression length of the telescopic sleeve is 30 mm;
from the above description, the measurement range of the cue stick instrument of the present invention is 30mm to 690 mm.
In summary, the improved ball bar instrument device based on laser ranging provided by the invention is provided with the adjusting part, the adjusting part is used for adjusting the distance between the three-point ranging mechanism and the static magnetic ball before measurement and is fixed in length, and the telescopic part can be adaptively telescopic according to the adjusting length of the adjusting part, so that the ball bar instrument can meet the requirements of different measuring space ranges; a laser ranging mechanism and a reflector are arranged, laser ranging is carried out by utilizing the principle of laser reflection, so that radial variation values of different positions on the circumference can be measured, further, the running error of the machine tool to be measured can be obtained, and the measured data is transmitted to a computer by a second Bluetooth transmission module; the displacement sensor on the three-point measuring mechanism can measure the displacement of the high-precision ball and further improve the measuring accuracy, the displacement sensor is transmitted to the computer through the first Bluetooth transmission module, and the computer performs calculation and error analysis on the final measuring result. The invention can carry out precision measurement in the full space range, has high accuracy of measurement precision and improves the measurement accuracy of the precision of the numerical control machine tool.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (9)
1. An improved ball arm instrument device based on laser ranging comprises a magnetic bowl seat and a workbench, wherein the magnetic bowl seat is fixedly arranged on the workbench, and the improved ball arm instrument device is characterized by further comprising a static magnetic ball, a laser ranging mechanism, a telescopic part, a reflecting part, a three-point measuring mechanism and an adjusting part for adjusting the distance between the static magnetic ball and the three-point measuring mechanism, wherein one side of the static magnetic ball is connected with the adjusting part, and the other side of the static magnetic ball is adsorbed on the magnetic bowl seat;
one side of the adjusting part, which is far away from the static magnetic ball, the laser ranging mechanism, the telescopic part, the reflecting part and the three-point measuring mechanism are sequentially connected;
the three-point measuring mechanism is used for being sleeved outside a high-precision ball of a machine tool to be measured;
one end of the reflecting part is embedded in one end of the telescopic part, which is far away from the laser ranging mechanism, so that light from the laser ranging mechanism is reflected back to the laser ranging mechanism in the telescopic part;
the three-point measuring mechanism drives the reflecting part to do interpolation motion along with the motion of the high-precision ball, so that the displacement change of the reflecting part on the motion track is fed back to the laser ranging mechanism.
2. An improved laser rangefinder apparatus as claimed in claim 1 wherein the reflecting portion is connected to the three point measuring mechanism by a movable joint.
3. The improved laser rangefinder based cue stick apparatus of claim 2 wherein the joint comprises a bearing and a shaft mount, the reflective portion, the bearing, the shaft mount and the three-point measuring mechanism being connected in series, wherein the shaft mount passes through an end of the bearing.
4. The improved laser ranging-based ball rod instrument device as claimed in claim 2, wherein the three-point measuring mechanism comprises a ring sleeve and a plurality of displacement sensors, the ring sleeve can be clamped outside the high-precision ball to perform interpolation movement along with the movement of the high-precision ball;
the plurality of displacement sensors are uniformly distributed on the outer side of the ring sleeve, and the outer side wall of the ring sleeve is connected with the reflecting part through the joint.
5. The improved cue instrument device based on laser ranging as claimed in claim 1, wherein the laser ranging mechanism comprises an annular shell, a laser range finder, a wireless transmission module and a spectroscope, a reflection cavity and a laser receiving cavity are arranged in the annular shell, a laser inlet is formed in the side wall of the reflection cavity, and a laser outlet is formed in one side of the reflection cavity, which is perpendicular to the laser inlet;
the laser outlet is connected with one end of the telescopic part;
one side of the laser receiving cavity of the annular shell is connected with the adjusting part;
the spectroscope is obliquely arranged in the reflecting cavity to refract the light rays from the laser inlet to the reflecting part;
the laser range finder is arranged in the laser receiving cavity, a gap is reserved between the spectroscope and the bottom of the reflecting cavity, and laser penetrates through the gap and enters the laser range finder;
the wireless transmission module is arranged in the laser receiving cavity and is electrically connected with the laser range finder.
6. The improved laser rangefinder apparatus as claimed in claim 5, wherein the laser rangefinder comprises a timer and a laser receiver, the laser receiver facing the reflective portion to receive the laser light reflected by the reflective portion;
the timer is electrically connected with the laser receiver to calculate the time length of the laser reflection process.
7. The improved laser rangefinder-based club instrument device as claimed in claim 5 wherein said reflective portion comprises a protective shell with an opening on one side and a reflector, said protective shell opening side facing said laser rangefinder and being connected to said telescoping portion, said protective shell side facing away from its opening side being connected to said three-point measurement mechanism;
the reflector is arranged on the inner wall of the protective shell and is right opposite to the laser range finder so as to reflect laser to the laser range finder.
8. The improved ball arm apparatus based on laser ranging as claimed in claim 1, wherein the adjusting part comprises a fastening member, an extension bar and an extension bar housing, the extension bar housing is sleeved outside the extension bar, the inner side wall of the extension bar housing is provided with a guide rail, the extension bar is arranged on the guide rail through a sliding block matched with the guide rail, so that the extension bar can slide relatively in the extension bar housing;
the fastener passes through the extension bar shell and is pressed against the extension bar so as to fix the extension bar after the extension bar is adjusted to a proper length.
9. An improved laser rangefinder based club instrument apparatus as claimed in claim 1 wherein said telescoping section is an elastic telescoping sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910670203.4A CN110370085B (en) | 2019-07-24 | 2019-07-24 | Improved ball arm instrument device based on laser ranging |
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| CN201910670203.4A CN110370085B (en) | 2019-07-24 | 2019-07-24 | Improved ball arm instrument device based on laser ranging |
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| CN111256597B (en) * | 2020-02-28 | 2021-09-07 | 陕西科技大学 | Mechanical laser tracking double-ball-bar instrument |
| CN111922782B (en) * | 2020-07-06 | 2021-09-14 | 杭州电子科技大学 | Method for detecting machine tool space error by using ball bar instrument constructed by ball hinge |
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| US4435905A (en) * | 1982-03-15 | 1984-03-13 | The United States Of America As Represented By The United States Department Of Energy | Telescoping magnetic ball bar test gage |
| US4492036A (en) * | 1984-01-11 | 1985-01-08 | Brown & Sharp Manufacturing Company | Magnetic ball bar gauge |
| US5428446A (en) * | 1993-03-29 | 1995-06-27 | Ziegert; John C. | Measurement instrument with interferometer and method |
| JPH0961115A (en) * | 1995-08-28 | 1997-03-07 | Sokkia Co Ltd | Ball gauge bar and optical length measuring device |
| GB9601679D0 (en) * | 1996-01-27 | 1996-03-27 | Renishaw Plc | Ball bar apparatus for calibrating a machine |
| JP2010137321A (en) * | 2008-12-11 | 2010-06-24 | Jtekt Corp | Double ball bar |
| CN101947746B (en) * | 2010-08-17 | 2013-04-17 | 西安交通大学 | Laser interference-based ball arm measuring device and method |
| CN208458667U (en) * | 2018-06-15 | 2019-02-01 | 厦门万久科技股份有限公司 | A kind of scalable ball bar of articulated type |
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