CN213196755U - Numerical control machine tool measuring device for improving machining precision of precision parts - Google Patents
Numerical control machine tool measuring device for improving machining precision of precision parts Download PDFInfo
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- CN213196755U CN213196755U CN202021772580.3U CN202021772580U CN213196755U CN 213196755 U CN213196755 U CN 213196755U CN 202021772580 U CN202021772580 U CN 202021772580U CN 213196755 U CN213196755 U CN 213196755U
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Abstract
The utility model provides an improve digit control machine tool measuring device of precision parts machining precision, includes measuring device, measuring device includes machining precision measuring mechanism, cutter monitoring mechanism, machining precision measuring mechanism installs the main shaft below at the digit control machine tool, cutter monitoring mechanism includes acceleration vibration sensor, noise sensor, acceleration vibration sensor installs on the workstation of digit control machine tool, noise sensor has a plurality of and the equipartition is in the workstation outside, machining precision measuring mechanism, acceleration vibration sensor, noise sensor are connected with control mechanism respectively. Improve digit control machine tool measuring device of accurate spare part machining precision, structural design is reasonable, can acquire work piece processingquality on line, can also adopt the failure state of monitoring the cutter effectively, avoided digit control machine tool cutter failure to break down the problem that causes great economic loss, application prospect is extensive.
Description
Technical Field
The utility model relates to a digit control machine tool technical field, concretely relates to improve digit control machine tool measuring device of accurate spare part machining precision.
Background
In the production and processing equipment of precision parts, a numerical control machine is one of important processing equipment. In the field of modern numerical control machining, online measurement is applied to the whole process of part production and machining, and reliable basis is provided for improvement of part quality detection, optimization of machining process and the like. The practical application of the on-line measurement technology in the machining industry gives great attention at home and abroad. On the one hand this is determined by the need for rapid development of society, especially today in the 21 st century where quality and efficiency are of concern; on the other hand, scientific and technical research has made great progress, and necessary hardware conditions can be provided for realizing on-line measurement application.
Although the development of numerical control machine testing technology has relatively matured. However, due to the restriction of factors such as production and cost, many enterprises at home and abroad still lack sufficient understanding of the online measurement technology, and the online measurement technology has great development potential. For the production of precision parts, due to the characteristics of complex structure, immature processing technology and the like, enterprises need to monitor the whole production cycle of the precision parts, and more advanced measurement means are needed to realize the measurement of parts difficult to measure. Therefore, it is urgently needed to develop a numerical control machine measuring device for improving the machining precision of the precision parts, and an online measuring technology is applied to ensure the machining quality of the precision parts and improve the production efficiency.
Chinese patent application No. CN201721425006.9 discloses a measuring device and a numerical control machine tool, which detachably set a base of the measuring device on a main shaft sliding table, thereby improving the measuring efficiency without optimizing and improving the structure of the measuring device.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: in order to overcome not enough above, the utility model aims at providing an improve digit control machine tool measuring device of accurate spare part machining precision, structural design is reasonable, can acquire work piece processingquality on line, can also adopt the failure state of monitoring the cutter effectively, has avoided digit control machine tool cutter inefficacy to break down and has caused great economic loss's problem, and application prospect is extensive.
The technical scheme is as follows: the utility model provides an improve digit control machine tool measuring device of precision parts machining precision, includes measuring device, measuring device includes machining precision measuring mechanism, cutter monitoring mechanism, machining precision measuring mechanism installs the main shaft below at the digit control machine tool, cutter monitoring mechanism includes acceleration vibration sensor, noise sensor, acceleration vibration sensor installs on the workstation of digit control machine tool, noise sensor has a plurality of and the equipartition is in the workstation outside, machining precision measuring mechanism, acceleration vibration sensor, noise sensor are connected with control mechanism respectively.
Improve digit control machine tool measuring device of accurate spare part machining precision, structural design is reasonable, has the function that the full cut-off ring of online acquisition work piece processingquality in order to realize work piece, machining precision measuring mechanism, cutter and digit control machine tool processed, can also gather vibration, the acoustic pressure signal that reflects cutter wearing and tearing state, monitor the failure condition of cutter effectively, avoided digit control machine tool cutter inefficacy to break down and caused great economic loss's problem, application prospect is extensive.
Further, foretell digit control machine tool measuring device who improves precision parts machining precision, machining precision measuring mechanism includes shell, reset spring, positioning mechanism, gauge head wing seat, measuring rod, gauge head, the upper end and the main shaft lower extreme of shell are connected, reset spring, gauge head wing seat are from last to installing inside the shell and reset spring, gauge head wing seat fixed connection in proper order down, positioning mechanism installs on gauge head wing seat, the measuring rod is installed to gauge head wing seat lower extreme, the end at the measuring rod is installed to the gauge head, the gauge head orientation work piece on the workstation.
In the measuring process, the measuring head is called by a main shaft of the numerical control machine tool and is driven by the control mechanism to measure the quality parameters of the workpiece on a workbench of the numerical control machine tool according to a certain path, the measuring head is a trigger switch sensor, when the measuring head in feeding is in contact with the measuring point on the measured workpiece, the measuring head is triggered, the control mechanism controls the numerical control machine tool to stop feeding movement, the quality parameters of the measured workpiece are stored by recording the coordinate value of the central point of the measuring head and leading the quality parameters into the control mechanism through the communication interface. After the whole measuring process is finished, coordinate values of a plurality of measuring points can be obtained, and the coordinate values are calculated in the control mechanism to obtain the size and precision information of the workpiece, so that the machining quality of the workpiece is obtained on line, and the full closed-loop machining of the workpiece, the measuring system, the cutter and the machine tool is realized.
Furthermore, the numerical control machine tool measuring device for improving the machining precision of the precision parts further comprises a batch number printer, wherein the batch number printer is arranged at the tail end of the crawler conveyor and is positioned on the right side of the sack closer; the batch number printer is an ink-jet batch number printer; the batch number printer is electrically connected with the electric control device.
Further, according to the numerical control machine tool measuring device for improving the machining precision of the precision parts, the measuring head is of a spherical structure and is 3mm in size, the sphericity error is smaller than 0.15 mu m, the surface quality Ra is smaller than or equal to 0.025 mu m, and the measuring head is made of ruby; the measuring rod is made of hard alloy steel.
Further, according to the numerically-controlled machine tool measuring device for improving the machining precision of the precision parts, the positioning mechanism is composed of 3 positioning columns, the positioning columns surround the return spring on the same level, and the angle between every two adjacent positioning columns is 120 degrees.
Furthermore, according to the numerical control machine tool measuring device for improving the machining precision of the precision parts, 3 ball pair supports are arranged on the outer side of the measuring head wing seat and consist of 2 supporting balls, and the ball pair supports are located below the positioning columns and support the positioning columns.
The working principle of the machining precision measuring mechanism is as follows: when the measuring head contacts with a workpiece to be measured, the wing seat of the measuring head in the shell is displaced or deflected under the action of external force, and at the moment, one pair of the three pairs of ball pair supports are disengaged inevitably to cause the change of the circuit state and generate a zero-crossing signal; when the measuring head is separated from the measured workpiece, the external force disappears, and the three pairs of ball pairs are supported to return to the original position under the action of the pressure spring; when the measuring head moves to reach the coordinate of the target measuring position, a latch signal is sent out, the three-dimensional coordinate value of the current numerical control machine tool movement is recorded in real time and transmitted to the control mechanism.
Furthermore, according to the numerical control machine tool measuring device for improving the machining precision of the precision parts, a valve is arranged at the joint of the packaging bin and the tail end of the bin-matching belt conveyor.
Furthermore, foretell digit control machine tool measuring device who improves precision parts machining precision, control mechanism includes controller, CNC, computer, the gauge head is connected with the controller through the RS-232 serial ports, the controller is connected with CNC, CNC passes through the interface and is connected with the computer.
The data measured by the measuring head is led into the controller through an RS-232 serial port, the controller transmits the acquired information to the CNC, the CNC refers to a CNC system adopted by a numerical control machine, and the CNC can perform data transmission, storage, numerical control machining, interpolation operation and other various control functions of the machine tool; the CNC can be connected with a computer or other multiple devices through an interface, and the communication with different objects can be completed only through command control.
Further, foretell digit control machine tool measuring device who improves precision parts machining precision, acceleration vibration sensor, noise sensor are connected with the controller respectively, the controller is connected with CNC, CNC passes through the interface and is connected with the computer, CNC is connected with the alarm.
The main factor of the numerical control machine tool failure is cutter failure, and if the failure state of the cutter cannot be monitored early and effectively, great economic loss can be caused to a machine tool factory. According to statistics, 1/5-1/3 of total downtime of the numerical control machine tool is caused by cutter failure, and the downtime of the numerical control machine tool with the cutter monitoring system can be reduced by 75%, so that the productivity is improved, and the utilization rate of the machine tool can be improved by over 50%. The acceleration vibration sensor and the noise sensor are connected with the controller in various ways, such as serial ports, wireless and the like, and are selected according to requirements. The CNC is stored with cutter initial stage wearing and tearing, vibration and sound pressure signal under 3 kinds of states of normal wearing and tearing and rapid wearing and tearing, acceleration vibration sensor, noise sensor gathers the vibration of cutter in real time, the sound pressure signal and give CNC through the transmission of controller, CNC receives and handles the vibration, the sound pressure signal, in case when discovering the cutter reaches the settlement wearing and tearing condition, will send the instruction and start the alarm and report to the police, remind maintenance personal to maintain or change the processing to the cutter, thereby avoid appearing because of the economic loss that cutter wearing and tearing appear.
Further, according to the numerical control machine tool measuring device for improving the machining precision of the precision parts, the CNC drives the numerical control machine tool through a servo system.
CNC drives the numerical control machine tool to complete machining and measuring operations through the servo system, and the servo system can realize position adjustment and feeding movement of each shaft of the machine tool under the control of a CNC instruction, so that the measurement precision, the surface quality and the production efficiency of the machine tool of a workpiece are improved.
The utility model has the advantages that:
(1) the utility model discloses an improve digit control machine tool measuring device of precision parts machining precision, structural design is reasonable, can acquire work piece processingquality on line, can also adopt the failure state of monitoring the cutter effectively, has avoided the problem that the numerical control machine tool cutter became invalid and has broke down and cause great economic loss, and application prospect is extensive;
(2) the utility model discloses an improve digit control machine tool measuring device of precision parts machining precision, the quality parameter of the work piece that is surveyed records the coordinate value of gauge head central point through the gauge head to lead in control mechanism by the communication interface and save; after the whole measuring process is finished, coordinate values of a plurality of measuring points can be obtained, and the coordinate values are calculated in a control mechanism to obtain the size and precision information of the workpiece, so that the processing quality of the workpiece is obtained on line, and the full closed-loop processing of the workpiece, a measuring system, a cutter and a machine tool is realized;
(3) improve digit control machine tool measuring device of accurate spare part machining precision, vibration, the acoustic pressure signal of cutter are gathered in real time to acceleration vibration sensor, noise sensor and give CNC through the controller transmission, CNC receives and handles vibration, acoustic pressure signal, in case find the cutter reach when setting for the wearing and tearing condition, will send the instruction start alarm and report to the police, remind maintenance personal to maintain or change the processing to the cutter to avoid appearing because of the economic loss that cutter wearing and tearing appear.
Drawings
FIG. 1 is a schematic view of the whole connection of the numerical control machine tool measuring device for improving the machining precision of precision parts of the present invention;
FIG. 2 is a schematic structural view of a machining precision measuring mechanism of the numerically-controlled machine tool measuring device for improving the machining precision of precision parts according to the present invention;
in the figure: the device comprises a measuring device 1, a machining precision measuring mechanism 11, a shell 1111, a return spring 112, a positioning mechanism 113, a positioning column 1131, a measuring head wing seat 114, a measuring rod 115, a measuring head 116, a ball pair support 117, a support ball 1171, a tool monitoring mechanism 12, an acceleration vibration sensor 121, a noise sensor 122, a numerical control machine tool 2, a main shaft 21, a workbench 22, a control mechanism 3, a controller 31, a CNC32, a computer 33, an alarm 34, a servo system 35 and a workpiece a.
Detailed Description
The invention will be further elucidated with reference to the accompanying figures 1-2 and the specific embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
The numerical control machine tool measuring device with the structure as shown in fig. 1 for improving the machining precision of the precision part comprises a measuring device 1, wherein the measuring device 1 comprises a machining precision measuring mechanism 11 and a cutter monitoring mechanism 12, the machining precision measuring mechanism 11 is installed below a main shaft 21 of a numerical control machine tool 2, the cutter monitoring mechanism 12 comprises an acceleration vibration sensor 121 and a noise sensor 122, the acceleration vibration sensor 121 is installed on a workbench 22 of the numerical control machine tool 2, the noise sensor 122 is provided with a plurality of parts and is uniformly distributed on the outer side of the workbench 22, and the machining precision measuring mechanism 11, the acceleration vibration sensor 121 and the noise sensor 122 are respectively connected with a control mechanism 3.
As shown in fig. 2, the machining accuracy measuring mechanism 11 includes a housing 1111, a return spring 112, a positioning mechanism 113, a measuring head wing seat 114, a measuring rod 115, and a measuring head 116, wherein the upper end of the housing 111 is connected to the lower end of the main shaft 21, the return spring 112 and the measuring head wing seat 114 are installed inside the housing 1111 from top to bottom, the return spring 112 and the measuring head wing seat 114 are sequentially and fixedly connected, the positioning mechanism 113 is installed on the measuring head wing seat 114, the measuring rod 115 is installed at the lower end of the measuring head wing seat 114, the measuring head 116 is installed at the end of the measuring rod 115, and the measuring head 116 faces the workpiece on the table 22.
In addition, the measuring head 116 is of a spherical structure and has a size of 3mm, a sphericity error is smaller than 0.15 mu m, a surface quality Ra is smaller than or equal to 0.025 mu m, and the measuring head 116 is made of ruby; the measuring rod 115 is made of hard alloy steel.
Furthermore, 112 and a measuring head wing seat 114 are sequentially and fixedly connected, the positioning mechanism 113 is arranged on the measuring head wing seat 114,
furthermore, the positioning mechanism 113 is composed of 3 positioning pillars 1131, the positioning pillars 1131 surround the return spring 112 on the same level, and the angle between adjacent positioning pillars 1131 is 120 °.
Furthermore, 3 ball pair supports 117 are disposed outside the measuring head wing seat 114, the ball pair support 117 is composed of 2 support balls 1171, and the ball pair support 117 is located below the positioning column 1131 and supports the positioning column 1131.
In addition, the control mechanism 3 comprises a controller 31, a CNC32 and a computer 33, wherein the measuring head 116 is connected with the controller 31 through an RS-232 serial port, the controller 31 is connected with a CNC32, and the CNC32 is connected with the computer 33 through an interface.
Further, the acceleration vibration sensor 121 and the noise sensor 122 are respectively connected with the controller 31, the controller 31 is connected with the CNC32, the CNC32 is connected with the computer 33 through an interface, and the CNC32 is connected with the alarm 34.
Further, the CNC32 drives the numerical control machine 2 through the servo system 35.
Examples
Based on the above structure, as shown in FIGS. 1-2.
Improve digit control machine tool measuring device of accurate spare part machining precision, structural design is reasonable, has the function that acquires work piece a processingquality so that realize work piece, machining precision measuring mechanism 11, cutter and digit control machine tool 2's full cut-off ring processing on line, can also gather vibration, the acoustic pressure signal that reflects cutter wearing and tearing state, monitor the failure condition of cutter effectively, avoided digit control machine tool 2 cutter inefficacy to break down and cause great economic loss's problem, application prospect is extensive.
During the measurement, the measuring head 116 is called by the main shaft 21 of the numerical control machine 2 and is driven by the control mechanism 3 to measure the quality parameter of the workpiece a on the worktable 22 of the numerical control machine 2 according to a certain path, the measuring head 116 is a trigger switch sensor, when the measuring head 116 in feeding contacts with the measuring point on the workpiece a to be measured, the measuring head 116 is triggered, the control mechanism 3 controls the numerical control machine 2 to stop feeding movement, the quality parameter of the workpiece a to be measured records the coordinate value of the central point of the measuring head 116 through the measuring head 116, and the coordinate value is led into the control mechanism 3 by the communication interface and stored. After the whole measuring process is finished, coordinate values of a plurality of measuring points can be obtained, and the coordinate values are calculated in the control mechanism 3 to obtain the size and precision information of the workpiece, so that the processing quality of the workpiece is obtained on line, and the full closed-loop processing of the workpiece a, the processing precision measuring mechanism 11, the cutter and the numerical control machine 2 is realized.
Further, the measuring head 116 is of a spherical structure and has a size of 3mm, a sphericity error is smaller than 0.15 μm, a surface quality Ra is smaller than or equal to 0.025 μm, and the measuring head 116 is made of ruby; the measuring rod 115 is made of hard alloy steel.
The working principle of the machining precision measuring mechanism 11 is as follows: three pairs of ball pair supports 117 in the shell 1111 are connected in series to form a closed active circuit, when the measuring head 116 is contacted with a measured workpiece a, under the action of external force, the measuring head wing seat 114 in the shell 1111 displaces or deflects, and at the moment, one pair of the three pairs of ball pair supports 117 is separated to cause the change of the circuit state, so that a zero-crossing signal is generated; when the measuring head 116 is separated from the measured workpiece a, the external force disappears, and the three pairs of ball pair supports 117 return to the original positions under the action of the pressure spring 1131; when the measuring head 116 moves to reach the target measuring position coordinate, a latch signal is sent out, and the three-dimensional coordinate value of the current movement of the numerical control machine tool 2 is recorded in real time and transmitted to the control mechanism 3.
Further, the data measured by the measuring head 116 is imported into the controller 31 through an RS-232 serial port, the controller 31 transmits the acquired information to the CNC32, the CNC32 refers to a CNC control system adopted by the numerical control machine 2, and the CNC32 can perform data transmission, storage, numerical control processing, interpolation operation and other various control functions of the machine tool; the CNC32 can be connected to the computer 33 or other devices through an interface, and its communication with various objects can be accomplished only by command control.
Further, the main factor of the failure of the numerical control machine 2 is the failure of the tool, and if the failure state of the tool cannot be monitored early and effectively, great economic loss is caused to a machine tool factory. According to statistics, 1/5-1/3 of the total downtime of the numerical control machine tool 2 is caused by cutter failure, and the downtime of the numerical control machine tool 2 with the cutter monitoring system can be reduced by 75%, so that the productivity is improved, and the utilization rate of the machine tool can be improved by over 50%. The acceleration vibration sensor 121 and the noise sensor 122 are connected to the controller 31 in a variety of ways, such as serial port, wireless, etc., and are selected as needed. The CNC32 is stored with cutter initial wear, vibration and sound pressure signal under 3 kinds of states of normal wearing and tearing and rapid wearing, acceleration vibration sensor 121, noise sensor 122 gather the vibration of cutter in real time, the sound pressure signal and transmit for the CNC through the controller, the CNC receives and handles vibration, the sound pressure signal, in case when finding that the cutter reaches the settlement wearing and tearing condition, will send the instruction and start alarm 34 and report to the police, remind maintenance personal to maintain or change the processing to the cutter, thereby avoid appearing because of the economic loss that the cutter wearing and tearing appears.
Furthermore, the CNC32 drives the numerical control machine to complete the processing and measuring operation through the servo system 35, and the servo system 35 can realize the position adjustment and the feeding movement of each axis of the machine under the control of a CNC instruction, thereby improving the workpiece measuring precision, the surface quality and the machine production efficiency.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, the present invention does not need to describe any combination of the features.
In addition, the embodiments of the present invention can be arbitrarily combined with each other, and the same shall be regarded as the disclosure of the present invention as long as the idea of the present invention is not violated.
Claims (8)
1. The utility model provides an improve digit control machine tool measuring device of precision parts machining precision, a serial communication port, including measuring device (1), measuring device (1) is including machining precision measuring mechanism (11), cutter monitoring mechanism (12), install main shaft (21) below digit control machine tool (2) machining precision measuring mechanism (11), cutter monitoring mechanism (12) are including acceleration vibration sensor (121), noise sensor (122), install on workstation (22) of digit control machine tool (2) acceleration vibration sensor (121), noise sensor (122) have a plurality of and the equipartition is in the workstation (22) outside, machining precision measuring mechanism (11), acceleration vibration sensor (121), noise sensor (122) are connected with control mechanism (3) respectively.
2. The numerical control machine tool measuring device for improving the machining precision of the precision part according to claim 1, wherein the machining precision measuring mechanism (11) comprises a shell (111), a return spring (112), a positioning mechanism (113), a measuring head wing seat (114), a measuring rod (115) and a measuring head (116), the upper end of the shell (111) is connected with the lower end of the main shaft (21), the return spring (112) and the measuring head wing seat (114) are installed inside the shell (111) from top to bottom, the return spring (112) and the measuring head wing seat (114) are sequentially and fixedly connected, the positioning mechanism (113) is installed on the measuring head wing seat (114), the measuring rod (115) is installed at the lower end of the measuring head wing seat (114), the measuring head (116) is installed at the tail end of the measuring rod (115), and the measuring head (116) faces a workpiece on the workbench (22).
3. The numerical control machine tool measuring device for improving the machining precision of the precision parts according to claim 2, wherein the measuring head (116) is of a spherical structure and is 3mm in size, the sphericity error is less than 0.15 μm, the surface quality Ra is less than or equal to 0.025 μm, and the measuring head (116) is made of ruby; the measuring rod (115) is made of hard alloy steel.
4. The NC machine tool measuring device for improving the machining precision of precise parts according to claim 2, wherein the positioning mechanism (113) is composed of 3 positioning pillars (1131), the positioning pillars (1131) surround the return spring (112) on the same level, and the angle between adjacent positioning pillars (1131) is 120 °.
5. The numerical control machine tool measuring device for improving the machining precision of the precision parts according to claim 4, wherein 3 ball pair supports (117) are arranged on the outer side of the measuring head wing seat (114), each ball pair support (117) consists of 2 support balls (1171), and each ball pair support (117) is located below a positioning column (1131) and supports the positioning column (1131).
6. The numerical control machine measuring device for improving the machining precision of the precise parts according to claim 2, wherein the control mechanism (3) comprises a controller (31), a CNC (32) and a computer (33), the measuring head (116) is connected with the controller (31) through an RS-232 serial port, the controller (31) is connected with the CNC (32), and the CNC (32) is connected with the computer (33) through an interface.
7. The NC machine tool measuring device for improving the machining precision of precise parts as claimed in claim 6, wherein the acceleration vibration sensor (121) and the noise sensor (122) are respectively connected with a controller (31), the controller (31) is connected with a CNC (32), the CNC (32) is connected with a computer (33) through an interface, and the CNC (32) is connected with an alarm (34).
8. The NC machine tool measurement apparatus for improving machining accuracy of precision parts according to claim 6, wherein the CNC (32) drives the NC machine tool (2) through a servo system (35).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114986256A (en) * | 2022-07-18 | 2022-09-02 | 成都飞机工业（集团）有限责任公司 | Multifunctional finish machining roughness on-machine measuring device and measuring method |
| CN115091263A (en) * | 2022-05-09 | 2022-09-23 | 深圳市海纳川机电有限公司 | High-precision measuring head with autonomous detection and judgment structure and using method thereof |
-
2020
- 2020-08-24 CN CN202021772580.3U patent/CN213196755U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115091263A (en) * | 2022-05-09 | 2022-09-23 | 深圳市海纳川机电有限公司 | High-precision measuring head with autonomous detection and judgment structure and using method thereof |
| CN114986256A (en) * | 2022-07-18 | 2022-09-02 | 成都飞机工业（集团）有限责任公司 | Multifunctional finish machining roughness on-machine measuring device and measuring method |
| CN114986256B (en) * | 2022-07-18 | 2022-12-13 | 成都飞机工业（集团）有限责任公司 | Multifunctional finish machining roughness on-machine measuring device and measuring method |
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