CN109732403B - Moving part repeated positioning precision detector - Google Patents
Moving part repeated positioning precision detector Download PDFInfo
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- CN109732403B CN109732403B CN201910196539.1A CN201910196539A CN109732403B CN 109732403 B CN109732403 B CN 109732403B CN 201910196539 A CN201910196539 A CN 201910196539A CN 109732403 B CN109732403 B CN 109732403B
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Abstract
The invention discloses a repeated positioning precision detector for a moving part, which belongs to the field of machine tool precision measurement and comprises an upper carrier module and a lower carrier module, wherein an upper hemispherical groove is arranged at the center of the upper carrier module, a lower hemispherical groove is arranged at the center of the lower carrier module, the upper hemispherical groove and the lower hemispherical groove are buckled to form a spherical accommodating space, a sensing sphere is arranged in the spherical accommodating space, a plurality of piezoelectric ceramic plates are uniformly adhered to the surface of the sensing sphere, three detection arms arranged along the radial direction are arranged on the sensing sphere, the three detection arms extend out of the upper carrier module and the lower carrier module and are distributed in three coordinate axes of space X, Y, Z, and semicircular through grooves for penetrating through the detection arms are correspondingly arranged on the upper carrier module and the lower carrier module; the multi-angle piezoelectric ceramic piece can reflect the fluctuation quantity of the measured cutter in each direction in real time, and is not limited to be shifted in three directions, so that the measured data is more targeted.
Description
Technical Field
The invention belongs to the field of machine tool precision measurement, and particularly relates to a moving part repeated positioning precision detector which can detect the repeated positioning precision of moving parts of various moving execution parts and moving structures on various machine tools.
Background
In a machine tool machining system, the precision of a tool nose point motion track is a key factor influencing the machining precision of the surface of a workpiece, and whether the machine tool machining system is a single-shaft system or a multi-shaft system, the verification of the repeated positioning precision of a motion mechanism for driving a tool is the key for ensuring the reliability of the repeated positioning precision of the machine tool. The number of driving shafts of the moving parts of the existing machine tool mainly comprises the following moving states: single-axis motion (linear motion, rotary motion and compound motion) and multi-axis spatial linkage compound motion, and in any motion state, due to the limitations of space and position, it is difficult to verify the repeated positioning precision in the motion state process of the tool driving shaft motion mechanism.
Chinese patent publication No. CN108177024A discloses a tool rest positioning accuracy and repeated positioning accuracy detection device and a use method thereof, which is a detection device for detecting general, rapid and convenient positioning accuracy and repeated positioning accuracy of a numerical control horizontal servo tool rest of different types without disassembling the tool pan by adopting a laser interference technical means based on the tool rest user and tool rest reliability test angle.
Disclosure of Invention
The invention aims to provide a detector for repeated positioning precision of a moving part; the technical scheme adopted for achieving the purpose is as follows:
a detector for repeated positioning precision of a moving part comprises an upper carrier module and a lower carrier module which are detachably and fixedly connected through bolts, an upper hemispherical groove is arranged at the center of the upper carrier module, a lower hemispherical groove is arranged at the center of the lower carrier module, the upper hemispherical groove and the lower hemispherical groove are buckled to form a spherical containing space, a sensing sphere is arranged in the spherical accommodating space, a plurality of piezoelectric ceramic pieces are uniformly stuck on the surface of the sensing sphere and abut against the inner wall of the spherical accommodating space, three detection arms arranged along the radial direction are arranged on the sensing sphere, the three detection arms extend out of the upper carrier module and/or the lower carrier module and are distributed in three coordinate axes of a space X, Y, Z, and semicircular through grooves for penetrating through the detection arms are correspondingly arranged on the upper carrier module and the lower carrier module.
Preferably, a gap is arranged between the detection arm and the semicircular through groove, and the gap is larger than the maximum vibration amplitude of the detection arm.
Preferably, a plurality of coordinate points are uniformly marked on the surface of the sensing sphere, a connecting plane is manufactured at the coordinate points, and the piezoelectric ceramic piece is correspondingly adhered to the connecting plane.
Preferably, the lower carrier module is provided with two positioning pins, and the upper carrier module is provided with positioning pin holes which are matched with the positioning pins.
Preferably, the detection arm is in threaded connection with the sensing sphere.
Preferably, the position, where the sensing sphere needs to be provided with the detection arm, is a mounting plane, and the detection arm is in threaded connection with the corresponding mounting plane.
Preferably, the detection arm is provided with a plane notch for clamping the wrench. .
The invention has the following beneficial effects:
(1) the invention has simple and compact structure and smaller overall size, and has wider practicability when facing a machine tool with large limitation.
(2) The transmission structure of the three-dimensional sliding table is a ball screw, the transmission precision is high, and the change condition of the cutter can be accurately reflected when measurement is carried out.
(3) The multi-angle piezoelectric ceramic piece can reflect the fluctuation quantity of the measured cutter in each direction in real time, and is not limited to be shifted in three directions, so that the measured data is more targeted.
(4) The three-dimensional detection arm can be connected with the cutters in three directions, the repeated precision of the cutters in the three directions can be measured by combining the action of the three-dimensional sliding table, and the application range of the device is enlarged.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is an exploded view of FIG. 1;
FIG. 3 is a perspective view of a sensing sphere;
fig. 4 is an assembly view of the present invention in use.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 3, a repeated positioning precision detector for moving parts comprises an upper carrier module 11 and a lower carrier module 14, wherein the upper carrier module 11 and the lower carrier module 14 are detachably and fixedly connected through a bolt 16, an upper hemispherical groove is arranged at the center of the upper carrier module 11, a lower hemispherical groove is arranged at the center of the lower carrier module 14, the upper hemispherical groove and the lower hemispherical groove are buckled to form a spherical accommodating space, a sensing sphere 19 is arranged in the spherical accommodating space, a plurality of piezoelectric ceramic plates 18 are uniformly stuck on the surface of the sensing sphere 19, the piezoelectric ceramic plates 18 are abutted against the inner wall of the spherical accommodating space, three detecting arms 13 are arranged on the sensing sphere 19 along the radial direction, the three detecting arms 13 extend out of the upper carrier module 11 and/or the lower carrier module 14 and are distributed in three coordinate axes of space X, Y, Z, semicircular through grooves 15 for penetrating the detection arms 13 are correspondingly arranged on the upper carrier module 11 and the lower carrier module 14.
Wherein, be equipped with interval and the interval is greater than the biggest vibration range that detects arm 13 between detecting arm 13 and the semicircle logical groove 15 to at the in-process that detects, detecting arm is not influenced, detects more accurately.
In order to make the installation and the manufacture of the piezoelectric ceramic piece 18 and the detection arm 13 simpler and easier, a plurality of coordinate points are uniformly marked on the surface of the sensing sphere 19, a connection plane is manufactured at the coordinate points, and the piezoelectric ceramic piece 18 is correspondingly pasted on the connection plane; the detection arm 13 is in threaded connection with the sensing sphere 19, the position, corresponding to the position needing to be provided with the detection arm 13, on the sensing sphere 19 is a mounting plane 110, a threaded counter bore is arranged on the mounting plane 110, the detection arm 13 is in threaded connection with the corresponding mounting plane 110, and meanwhile, a plane notch 12 used for clamping a wrench is arranged on the detection arm 13.
In order to achieve the pre-positioning function when the upper carrier module 11 and the lower carrier module 14 are assembled to form a spherical accommodating space, two positioning pins 17 are arranged on the lower carrier module 14, and positioning pin holes which are matched with the positioning pins 17 are arranged on the upper carrier module 11.
As shown in fig. 4, for convenience of description, the above-mentioned repeated positioning precision detector of the moving part is simply referred to as a detector 1, when the present invention is used, the detector 1 is installed on a detection control device, and then the detection control device is installed on a corresponding machining lathe or a machining center working platform, wherein the detection control device comprises a support plate 2, a three-dimensional sliding table 3 is fixed on the support plate 2, and the detector 1 is installed on a sliding arm of the three-dimensional sliding table 3; the movement of each dimension of the three-dimensional sliding table 3 is realized through a screw-nut pair, and a screw rod is driven by a motor to rotate.
When the invention is used, the following conditions can be divided according to different action objects and motions:
embodiment 1:
when the method is implemented on a machining center mainly using turning, the support plate 2 is installed on a worktable of the machining center, the horizontal moving direction of the bottom three-dimensional sliding table 3 is ensured to be the same as the two horizontal moving directions of a moving part of the machining center, and the vertical position of the detector 1 ensures that the extending end of the detection arm 13 can be rigidly fixed with the moving part of the machining center or can be fixed by adding necessary tools. The moving speed and the stroke of a moving part of a machining center are set, the sliding of the three-dimensional sliding table 3 in the horizontal moving direction is controlled at the same time, the moving speed and the stroke of the detector 1 are kept consistent with those of the moving part of the machining center, in the moving process of the moving part of the machining center, the spatial jumping of the part is transmitted to the sensing sphere 19 through the detection arm 13 in real time to act on the piezoelectric ceramic plate 18, so that a piezoelectric signal is generated, and finally, the spatial jumping amount of the moving part of the machining center at any position can be analyzed through the acquisition of electric signals output by different piezoelectric ceramic plates 18, and meanwhile, the accumulated fluctuation error of the whole stroke can also be obtained.
Embodiment 2:
when the milling-based machining center is implemented, the support plate 2 is installed on a workbench of the machining center, and the movement of the three-dimensional sliding table 3 in all directions is adjusted, so that the extending end of the detection arm 13 can be rigidly fixed with a moving part of the machining center, or the required tool can be added for fixing. Because the motion form of the motion part of the machining center of the milling machine is rotation and movement, when the repeated positioning precision detection is carried out on the motion part of the machining center mainly based on milling, the jumping quantity in the rotation process of the motion part of the machining center needs to be converted into the fixed-point jumping quantity, simultaneously, the moving speed and the stroke of the moving part of the machining center are set, and the sliding of the three-dimensional sliding table 3 in the horizontal moving direction is controlled, so that the moving speed and the stroke of the detector 1 are consistent with those of the moving part of the machining center, the fixed point jumping amount is converted into a piezoelectric signal of a piezoelectric ceramic piece 18 in the measuring module through the rigid connection of the fixed point position and the detecting arm 13, through the process of collecting the output electrical signals of the different piezoceramic wafers 18 in the measurement module, the spatial jumping quantity of the moving part of the machining center at any position can be analyzed, and meanwhile, the accumulated fluctuation error of the whole stroke can be obtained.
Embodiment 3:
when the method is implemented on a polyhedron machining center, the supporting plate 2 is arranged on a worktable of the machining center, and due to the diversity of moving parts of a driving shaft of the polyhedron machining center, the movement of the three-dimensional sliding table 3 in all directions is adjusted, so that the extending end of the detection arm 13 can be rigidly fixed with the moving parts of the machining center, and necessary tools can be added for fixing. The moving speed and the stroke of the processing center moving part at different positions are set, the sliding in the horizontal moving direction of the three-dimensional sliding table 3 is controlled at the same time, the moving speed and the stroke of the detector 1 are kept consistent with those of the processing center moving part, the piezoelectric ceramic pieces can generate piezoelectric signals in the moving process of the processing center moving part, the space jumping amount of the processing center moving part at any position can be analyzed through the acquisition of output electric signals of different piezoelectric ceramic pieces in a measuring module, and meanwhile, the accumulated fluctuation error of the whole stroke can also be obtained.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: it is to be understood that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, but such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A detector for repeated positioning precision of a moving part is characterized by comprising an upper carrier module and a lower carrier module which are detachably and fixedly connected through bolts, an upper hemispherical groove is arranged at the center of the upper carrier module, a lower hemispherical groove is arranged at the center of the lower carrier module, the upper hemispherical groove and the lower hemispherical groove are buckled to form a spherical containing space, a sensing sphere is arranged in the spherical accommodating space, a plurality of piezoelectric ceramic pieces are uniformly stuck on the surface of the sensing sphere and abut against the inner wall of the spherical accommodating space, three detection arms arranged along the radial direction are arranged on the sensing sphere, the three detection arms extend out of the upper carrier module and/or the lower carrier module and are distributed in three coordinate axes of a space X, Y, Z, and semicircular through grooves for penetrating through the detection arms are correspondingly arranged on the upper carrier module and the lower carrier module.
2. The motion component repositioning accuracy detector of claim 1, wherein the detection arm is spaced from the semi-circular channel by a distance greater than a maximum vibration amplitude of the detection arm.
3. The detector according to claim 1, wherein a plurality of coordinate points are uniformly marked on the surface of the sensing sphere, a connection plane is formed at the coordinate points, and the piezoelectric ceramic plate is correspondingly adhered to the connection plane.
4. The detector according to any one of claims 1 to 3, wherein two positioning pins are provided on the lower carrier module, and a positioning pin hole for cooperating with the positioning pin is provided on the upper carrier module.
5. The detector according to any of claims 1 to 3, wherein the detection arm is screwed to the sensing sphere.
6. The detector according to claim 5, wherein the position of the sensing sphere corresponding to the position of the detecting arm is a mounting plane, and the detecting arm is screwed on the corresponding mounting plane.
7. The moving part repositioning accuracy detector according to any of claims 1 to 3, wherein a flat notch for catching the wrench is provided on the detection arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910196539.1A CN109732403B (en) | 2019-03-15 | 2019-03-15 | Moving part repeated positioning precision detector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910196539.1A CN109732403B (en) | 2019-03-15 | 2019-03-15 | Moving part repeated positioning precision detector |
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| CN109732403A CN109732403A (en) | 2019-05-10 |
| CN109732403B true CN109732403B (en) | 2020-08-18 |
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| CN114812647B (en) * | 2022-03-30 | 2024-03-12 | 西北核技术研究所 | Direction-adjustable sensor mounting seat and mounting method thereof |
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| CN103940335A (en) * | 2014-04-25 | 2014-07-23 | 南京埃斯顿机器人工程有限公司 | Device for measuring repeated positioning accuracy of industrial robot |
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| CN105479271A (en) * | 2016-01-29 | 2016-04-13 | 电子科技大学 | Sphere center centring and positioning device for five-axis machine tool error synchronous detection mechanism |
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| CN108177024A (en) * | 2018-03-21 | 2018-06-19 | 吉林大学 | Knife rest positioning accuracy and repetitive positioning accuracy detection device and application method |
| JP6419380B1 (en) * | 2018-06-28 | 2018-11-07 | 株式会社浅沼技研 | Inspection master |
| CN208117408U (en) * | 2018-03-21 | 2018-11-20 | 吉林大学 | Knife rest positioning accuracy and repetitive positioning accuracy detection device |
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2019
- 2019-03-15 CN CN201910196539.1A patent/CN109732403B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940335A (en) * | 2014-04-25 | 2014-07-23 | 南京埃斯顿机器人工程有限公司 | Device for measuring repeated positioning accuracy of industrial robot |
| CN104535029A (en) * | 2014-12-30 | 2015-04-22 | 苏州博众精工科技有限公司 | Three-dimensional detection mechanism for repeated positioning |
| CN105479271A (en) * | 2016-01-29 | 2016-04-13 | 电子科技大学 | Sphere center centring and positioning device for five-axis machine tool error synchronous detection mechanism |
| CN106584513A (en) * | 2017-01-26 | 2017-04-26 | 武汉延锋时代检测技术股份有限公司 | Industrial robot repeated positioning accuracy testing method and industrial robot repeated positioning accuracy testing device |
| CN108177024A (en) * | 2018-03-21 | 2018-06-19 | 吉林大学 | Knife rest positioning accuracy and repetitive positioning accuracy detection device and application method |
| CN208117408U (en) * | 2018-03-21 | 2018-11-20 | 吉林大学 | Knife rest positioning accuracy and repetitive positioning accuracy detection device |
| JP6419380B1 (en) * | 2018-06-28 | 2018-11-07 | 株式会社浅沼技研 | Inspection master |
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