CN112729193A - Measuring pin positioning locking adjusting device of coordinate measuring machine - Google Patents
Measuring pin positioning locking adjusting device of coordinate measuring machine Download PDFInfo
- Publication number
- CN112729193A CN112729193A CN202011532067.1A CN202011532067A CN112729193A CN 112729193 A CN112729193 A CN 112729193A CN 202011532067 A CN202011532067 A CN 202011532067A CN 112729193 A CN112729193 A CN 112729193A
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- Prior art keywords
- measuring
- stud
- guide rod
- chuck
- probe
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- 239000000523 sample Substances 0.000 claims abstract description 58
- 241001422033 Thestylus Species 0.000 claims description 17
- 238000009434 installation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
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Classifications
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/04—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
- G01B21/047—Accessories, e.g. for positioning, for tool-setting, for measuring probes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a measuring needle positioning locking adjusting device of a coordinate measuring machine, which comprises a measuring needle mounting frame, a measuring needle chuck, a measuring needle guide rod, an adjusting nut, a stud and a compensating spring, wherein the measuring needle mounting frame is arranged below the measuring needle chuck; the probe chuck is internally provided with an accommodating cavity, and the bottom of the probe chuck is provided with a through hole communicated with the accommodating cavity; the stud and the compensating spring are arranged in the accommodating cavity, the bottom of the stud is provided with a measuring needle guide rod, and the side part of the stud is provided with an adjusting nut. The invention has the advantages of simple structure, large adjustment range and long service life, and the inclined plane on the measuring needle guide rod is contacted with the inclined plane of the through hole by matching the funnel-shaped through hole and the circular truncated cone-shaped measuring needle guide rod to form wedge-shaped friction so as to realize friction self-locking; the adjusting nut is rotated to drive the stud to move up and down, the lifting of the measuring pin guide rod is controlled, the measuring pin on the measuring pin mounting frame can be adjusted by loosening the measuring pin mounting frame, and the adjusting range is large.
Description
Technical Field
The invention relates to the technical field of measurement, in particular to a positioning and locking adjusting device for a measuring pin of a coordinate measuring machine.
Background
A novel efficient precision measuring instrument for a three-coordinate measuring machine is characterized in that a measuring head is used for picking up signals by the three-coordinate measuring machine, and the performance of the measuring head directly influences the measuring precision and the measuring efficiency. The measuring head used on the three-coordinate measuring machine can be divided into a contact type and a non-contact type. The non-contact measuring head is based on the light reflection principle, a measuring needle is not needed in the measuring process, but the range in the height direction is very small due to the limitation of the focusing range; meanwhile, the measuring result of the non-contact measuring head is greatly influenced by the material and the surface roughness of the measured piece, and the use occasion is greatly limited. At present, the precision is the highest, and the widest application range is the contact type measuring head. The contact probe requires a stylus to touch the part to be measured. The measuring probe is reliably, quickly and conveniently clamped, and the measuring probe is very important for improving the measuring precision and the measuring efficiency.
In the prior art, besides the initial assembly precision of the measuring needle and the measuring head, the repeated stress of the measuring needle can influence the installation precision between the measuring needle and the measuring head, so that the measuring position of the measuring needle generates certain deviation, and the measuring precision and the service life of the measuring instrument are influenced.
Disclosure of Invention
The invention aims to solve the problems of poor measurement precision and short service life in the prior art, and provides a positioning and locking adjusting device for a measuring pin of a coordinate measuring machine.
In order to achieve the purpose, the invention provides a positioning and locking adjusting device for a measuring pin of a coordinate measuring machine, which comprises a measuring pin mounting frame, a measuring pin chuck, a measuring pin guide rod, an adjusting nut, a stud and a compensating spring, wherein the measuring pin mounting frame is arranged below the measuring pin chuck; the probe chuck is internally provided with an accommodating cavity, and the bottom of the probe chuck is provided with a through hole communicated with the accommodating cavity; the stud and the compensating spring are arranged in the accommodating cavity, wherein the compensating spring is positioned above the stud; the bottom of the stud is provided with a measuring needle guide rod, and the side part of the stud is provided with an adjusting nut; a measuring needle mounting rack is arranged below the measuring needle guide rod, and a measuring needle is fixed on the measuring needle mounting rack.
Preferably, the adjusting nut is arranged on the side part of the measuring pin clamp, penetrates through the measuring pin clamp and extends into the accommodating cavity.
Preferably, the adjusting nut is provided with an external thread, and the adjusting nut is meshed with the stud through the external thread.
Preferably, a fixed shaft is arranged at the bottom of the stud, a bearing seat is arranged on the upper surface of the measuring needle guide rod, and the stud and the measuring needle guide rod are movably connected with the bearing seat through the fixed shaft.
Preferably, one end of the compensation spring is fixedly connected with the top of the accommodating cavity, and the other end of the compensation spring abuts against the upper surface of the stud.
Preferably, the adjusting nut is provided with a rotating shaft, and the rotating shaft is movably connected with the measuring needle clamp.
Preferably, the through hole at the bottom of the probe chuck is in a funnel shape with a wide upper end and a narrow lower end; the measuring needle guide rod is in a circular truncated cone shape with a wide upper end and a narrow lower end; the measuring probe guide rod is arranged in a through hole at the bottom of the measuring probe chuck, wherein the circular truncated cone-shaped measuring probe guide rod is matched with the funnel-shaped through hole.
Preferably, the bottom of the measuring probe guide rod is provided with a threaded hole, and the measuring probe mounting frame is provided with a screw matched with the threaded hole.
Preferably, the device for adjusting the positioning and locking of the measuring pin of the coordinate measuring machine comprises a measuring pin mounting frame, a measuring pin chuck, a measuring pin guide rod, an adjusting part, a stud and a compensating spring, wherein the measuring pin mounting frame is arranged below the measuring pin chuck, the measuring pin guide rod is arranged inside the measuring pin chuck, and the measuring pin guide rod is fixedly connected with the measuring pin mounting frame; the probe measuring device is characterized in that an accommodating cavity is formed in the probe measuring chuck, and a through hole is formed in the bottom of the probe measuring chuck and communicated with the accommodating cavity; the stud and the compensating spring are arranged in the accommodating cavity, wherein the compensating spring is positioned above the stud; the adjusting piece is sleeved outside the probe chuck, and the upper end and the lower end of the adjusting piece are embedded into the probe chuck and movably connected with the probe chuck; the inner side of the adjusting piece extends into the accommodating cavity, and the center of the adjusting piece is provided with an internal thread hole which is meshed with the stud; the bottom of the stud is provided with a measuring needle guide rod, a measuring needle mounting frame is arranged below the measuring needle guide rod, and a measuring needle is fixed on the measuring needle mounting frame.
The invention has the advantages of simple structure, large adjustment range and long service life, and the inclined plane on the measuring needle guide rod is contacted with the inclined plane of the through hole by matching the funnel-shaped through hole and the circular truncated cone-shaped measuring needle guide rod to form wedge-shaped friction so as to realize friction self-locking; the adjusting nut is rotated to drive the stud to move up and down, the lifting of the measuring needle guide rod is controlled, the measuring needle on the measuring needle mounting frame can be adjusted by loosening the measuring needle mounting frame, the adjustable range is large, the measuring needle is parallel to the three axes of the coordinate machine respectively, the measuring needle guide rod is controlled to ascend through the adjusting nut, the measuring needle mounting frame is tensioned, the measuring needle mounting frame is contacted with the measuring needle chuck, and the measuring needle mounting frame is prevented from rotating.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of a preferred construction of the present invention;
fig. 2 is a schematic view of another preferred structure of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | |
60 | |
| 101 | |
70 | |
| 20 | |
80 | |
| 201 | Accommodating |
90 | |
| 202 | Through |
100 | Adjusting |
| 30 | |
1001 | Adjusting part threaded |
| 301 | Threaded |
110 | Fixed shaft |
| 40 | Adjusting |
120 | |
| 50 | |
130 | Bearing assembly |
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and 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.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The invention provides a measuring needle positioning locking adjusting device of a coordinate measuring machine.
Referring to fig. 1, a positioning, locking and adjusting device for a measuring pin of a coordinate measuring machine comprises a measuring pin mounting frame 10, a measuring pin chuck 20, a measuring pin guide rod 30, an adjusting nut 40, a stud 50 and a compensating spring 60, wherein the measuring pin mounting frame 10 is arranged below the measuring pin chuck 20, the measuring pin guide rod 30 is arranged inside the measuring pin chuck 20, the measuring pin guide rod 30 is fixedly connected with the measuring pin mounting frame 10, and the upper end of the measuring pin chuck 20 is fixedly connected with a machine head 70 of the coordinate measuring machine; the inside of the probe card holder 20 is provided with an accommodating cavity 201, and the bottom of the probe card holder 20 is provided with a through hole 202 communicated with the accommodating cavity 201; the stud 50 and the compensation spring 60 are arranged in the accommodating cavity 201, wherein the compensation spring 60 is located above the stud 50, one end of the compensation spring 60 is fixedly connected with the top of the accommodating cavity 201, and the other end of the compensation spring 60 abuts against the upper surface of the stud 50.
An adjusting nut 40 is arranged on the side part of the stud 50, the adjusting nut 40 is arranged on the side part of the measuring probe clamp 20, a rotating shaft 90 is arranged on the adjusting nut 40, and the adjusting nut is movably connected with the measuring probe clamp 20 through the rotating shaft 90; the adjusting nut 40 penetrates through the stylus clamp 20 and extends into the accommodating cavity 201, an external thread is arranged on the adjusting nut 40, and the adjusting nut is meshed with the stud 50 in the accommodating cavity 201 through the external thread 40.
The bottom of the stud 50 is provided with a measuring needle guide rod 30, wherein the bottom of the stud 50 is provided with a fixed shaft 110, the upper surface of the measuring needle guide rod 30 is provided with a bearing seat 120, and the stud 50 and the measuring needle guide rod 30 are movably connected with the bearing seat 120 through the fixed shaft 110.
A measuring pin mounting frame 10 is arranged below the measuring pin guide rod 30, a threaded hole 301 is formed in the bottom of the measuring pin guide rod 30, a screw 101 matched with the threaded hole 301 is arranged on the measuring pin mounting frame 10, the measuring pin mounting frame 10 is a square body, and a measuring pin 80 is fixed on the measuring pin mounting frame 10.
The through hole 202 at the bottom of the probe chuck 20 is in a funnel shape with a wide upper end and a narrow lower end; the stylus guide rod 30 is in a truncated cone shape with a wide upper end and a narrow lower end; the measuring probe guide rod 30 is arranged in a through hole 202 at the bottom of the measuring probe chuck 20, wherein the circular truncated cone-shaped measuring probe guide rod 30 is matched with the surface of the funnel-shaped through hole 202, and the diameter of the funnel-shaped through hole 202 is smaller than that of the circular truncated cone-shaped measuring probe guide rod 30, so that the limiting effect is achieved.
The principle of mounting the stylus by this embodiment: firstly, the measuring needle 80 is installed on the measuring needle installation rack 10 in all directions, the adjusting nut 40 is rotated clockwise, the adjusting nut 40 is meshed with the stud 50, when the adjusting nut 40 rotates clockwise, the stud 50 moves downwards, the measuring needle guide rod 30 is driven to move downwards through the fixing shaft 110 at the bottom of the stud 50, when the measuring needle guide rod 30 descends to the lowest position, namely the inclined surface of the measuring needle guide rod 30 is in close contact with the inclined surface of the funnel-shaped through hole 202 to form wedge friction under the action of pressure, then the screw 101 of the measuring needle installation rack 10 is screwed into the threaded hole 301 of the measuring needle guide rod 30 and tightened, so that the measuring needle 80 is respectively parallel to three axes on the three-coordinate measuring machine, at the moment, the measuring needle guide rod 30 realizes self-locking under the action of the wedge friction, the thrust of the stud 50 and the pressure of the compensating spring 60; if the measuring needle 80 and the three axes of the three-coordinate measuring machine cannot be completely parallel after the measuring needle mounting frame 10 is screwed down, the measuring needle mounting frame 10 is loosened to adjust the measuring needle 80 and the three axes of the three-coordinate measuring machine to be parallel, then the adjusting nut 40 is rotated anticlockwise, when the adjusting nut 40 rotates clockwise, the stud 50 moves upwards, and then the fixing shaft 110 at the bottom of the stud 50 drives the measuring needle guide rod 30 to move upwards, so that the measuring needle mounting frame 10 moves upwards to be in close contact with the bottom of the measuring needle chuck 20 to realize the tensioning effect, the measuring needle mounting frame 10 is tensioned, and the measuring needle mounting frame 10 is prevented from rotating; in the process of upward movement of the stud 50, the compensation spring 60 generates downward pressure on the stud 50, so that the stud 50 is tightly engaged with the nut 40, and the fastening state of the stylus guide rod 30 and the stylus mounting frame 10 is maintained; when the measuring probe mounting frame 10 is dismounted, the measuring probe guide rod 30 can not rotate along with the measuring probe mounting frame 10.
As shown in fig. 2, another preferred structural schematic diagram of the present invention is a coordinate measuring machine stylus positioning locking adjusting device, which includes a stylus mounting bracket 10, a stylus clamping head 20, a stylus guiding rod 30, an adjusting member 100, a stud 50, and a compensation spring 60, wherein the stylus mounting bracket 10 is disposed below the stylus clamping head 20, the stylus guiding rod 30 is disposed inside the stylus clamping head 20, the stylus guiding rod 30 is fixedly connected to the stylus mounting bracket 10, and the upper end of the stylus clamping head 20 is fixedly connected to a coordinate measuring machine head 70; the inside of the probe card holder 20 is provided with an accommodating cavity 201, and the bottom of the probe card holder 20 is provided with a through hole 202 communicated with the accommodating cavity 201; the stud 50 and the compensation spring 60 are arranged in the accommodating cavity 201, wherein the compensation spring 60 is positioned above the stud 50; the adjusting part 100 is sleeved outside the probe card holder 20, the adjusting part 100 is movably connected with the probe card holder 20 through a bearing 130, wherein the upper end and the lower end of the adjusting part 100 are embedded into the probe card holder 20 and are movably connected with the probe card holder 20; the inner side of the adjusting piece 100 extends into the accommodating cavity 201, the center of the adjusting piece 100 is provided with an internal threaded hole 1001, and the internal threaded hole 1001 of the adjusting piece is meshed with the stud 50; the bottom of the stud 50 is provided with a measuring probe guide rod 30, a measuring probe mounting frame 10 is arranged below the measuring probe guide rod 30, and a measuring probe 80 is fixed on the measuring probe mounting frame 10.
The invention has the advantages of simple structure, large adjustment range and long service life, and the inclined surface on the measuring needle guide rod 30 is contacted with the inclined surface of the through hole 202 by matching the funnel-shaped through hole 202 with the circular truncated cone-shaped measuring needle guide rod 30 to form wedge-shaped friction and realize friction self-locking; drive double-screw bolt 50 through rotating adjusting nut 40 and reciprocate, the lift of control survey needle guide arm 30, and then adjust the survey needle 80 on the survey needle mounting bracket 10 through relaxing survey needle mounting bracket 10, but adjusting range is big, make survey needle 80 be parallel with the triaxial of coordinate machine respectively, then through adjusting nut 40, it drives survey needle mounting bracket 10 lift to control survey needle guide arm 30 through double-screw bolt 50, taut survey needle mounting bracket 10, make survey needle mounting bracket 10 and the contact of survey needle chuck 20 bottom surface, prevent that survey needle mounting bracket 10 from rotating.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A measuring needle positioning locking adjusting device of a coordinate measuring machine comprises a measuring needle mounting frame, a measuring needle chuck, a measuring needle guide rod, an adjusting nut, a stud and a compensating spring, wherein the measuring needle mounting frame is arranged below the measuring needle chuck; the probe measuring device is characterized in that an accommodating cavity is formed in the probe measuring chuck, and a through hole is formed in the bottom of the probe measuring chuck and communicated with the accommodating cavity; the stud and the compensating spring are arranged in the accommodating cavity, wherein the compensating spring is positioned above the stud; the bottom of the stud is provided with a measuring needle guide rod, and the side part of the stud is provided with an adjusting nut; a measuring needle mounting rack is arranged below the measuring needle guide rod, and a measuring needle is fixed on the measuring needle mounting rack.
2. The CMM pin locator lock adjustment assembly of claim 1, wherein the adjustment nut is disposed on a side of the pin holder, the adjustment nut extending through the pin holder and into the receiving cavity.
3. The coordinate measuring machine stylus positioning and locking adjustment device of claim 2, wherein the adjustment nut is externally threaded and is engaged with the stud via the external thread.
4. The device of claim 1, wherein the stud has a fixed shaft at the bottom thereof, and the stylus guide bar has a bearing seat on the upper surface thereof, wherein the stud and the stylus guide bar are movably connected to the bearing seat by the fixed shaft.
5. The apparatus of claim 1, wherein one end of the compensation spring is fixedly connected to the top of the receiving cavity, and the other end of the compensation spring abuts against the upper surface of the stud.
6. The apparatus of claim 1, wherein the adjusting nut has a shaft, and the shaft is movably connected to the stylus holder.
7. The device for adjusting the positioning and locking of the measuring pin of the coordinate measuring machine according to claim 1, wherein the through hole at the bottom of the measuring pin chuck is in a funnel shape with a wide upper end and a narrow lower end; the measuring needle guide rod is in a circular truncated cone shape with a wide upper end and a narrow lower end; the measuring probe guide rod is arranged in a through hole at the bottom of the measuring probe chuck, wherein the circular truncated cone-shaped measuring probe guide rod is matched with the funnel-shaped through hole.
8. The device of claim 1, wherein a threaded hole is formed in the bottom of the stylus guide rod, and a screw rod matched with the threaded hole is arranged on the stylus mounting frame.
9. A coordinate measuring machine measuring pin positioning locking adjusting device is characterized by comprising a measuring pin mounting frame, a measuring pin chuck, a measuring pin guide rod, an adjusting piece, a stud and a compensating spring, wherein the measuring pin mounting frame is arranged below the measuring pin chuck; the probe measuring device is characterized in that an accommodating cavity is formed in the probe measuring chuck, and a through hole is formed in the bottom of the probe measuring chuck and communicated with the accommodating cavity; the stud and the compensating spring are arranged in the accommodating cavity, wherein the compensating spring is positioned above the stud; the adjusting piece is sleeved outside the probe chuck, and the upper end and the lower end of the adjusting piece are embedded into the probe chuck and movably connected with the probe chuck; the inner side of the adjusting piece extends into the accommodating cavity, and the center of the adjusting piece is provided with an internal thread hole which is meshed with the stud; the bottom of the stud is provided with a measuring needle guide rod, a measuring needle mounting frame is arranged below the measuring needle guide rod, and a measuring needle is fixed on the measuring needle mounting frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011532067.1A CN112729193A (en) | 2020-12-23 | 2020-12-23 | Measuring pin positioning locking adjusting device of coordinate measuring machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011532067.1A CN112729193A (en) | 2020-12-23 | 2020-12-23 | Measuring pin positioning locking adjusting device of coordinate measuring machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112729193A true CN112729193A (en) | 2021-04-30 |
Family
ID=75605777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011532067.1A Pending CN112729193A (en) | 2020-12-23 | 2020-12-23 | Measuring pin positioning locking adjusting device of coordinate measuring machine |
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| Country | Link |
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| CN (1) | CN112729193A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113681352A (en) * | 2021-09-18 | 2021-11-23 | 中国航空工业集团公司北京航空精密机械研究所 | Numerical control machine tool on-machine measuring method based on double-contact workpiece measuring head |
| CN116773256A (en) * | 2023-06-12 | 2023-09-19 | 深圳市实准科技有限公司 | Combined sampler structure |
-
2020
- 2020-12-23 CN CN202011532067.1A patent/CN112729193A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113681352A (en) * | 2021-09-18 | 2021-11-23 | 中国航空工业集团公司北京航空精密机械研究所 | Numerical control machine tool on-machine measuring method based on double-contact workpiece measuring head |
| CN113681352B (en) * | 2021-09-18 | 2023-12-15 | 中国航空工业集团公司北京航空精密机械研究所 | On-machine measurement method of numerical control machine tool based on double-contact workpiece measuring head |
| CN116773256A (en) * | 2023-06-12 | 2023-09-19 | 深圳市实准科技有限公司 | Combined sampler structure |
| CN116773256B (en) * | 2023-06-12 | 2024-05-10 | 深圳市实准科技有限公司 | Combined sampler structure |
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Application publication date: 20210430 |