CN114453978A - Drill bit jitter analysis and outer diameter measurement device - Google Patents

Drill bit jitter analysis and outer diameter measurement device Download PDF

Info

Publication number
CN114453978A
CN114453978A CN202210056132.0A CN202210056132A CN114453978A CN 114453978 A CN114453978 A CN 114453978A CN 202210056132 A CN202210056132 A CN 202210056132A CN 114453978 A CN114453978 A CN 114453978A
Authority
CN
China
Prior art keywords
dimensional scale
drill bit
scale
measurement
dimensional
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210056132.0A
Other languages
Chinese (zh)
Inventor
姜业红
张英
项明诚
俞明权
胡德胜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dongguan Inze Industrial Co ltd
Original Assignee
Dongguan Inze Industrial Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dongguan Inze Industrial Co ltd filed Critical Dongguan Inze Industrial Co ltd
Priority to CN202210056132.0A priority Critical patent/CN114453978A/en
Publication of CN114453978A publication Critical patent/CN114453978A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, 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
    • B23Q17/00Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/24Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves
    • B23Q17/2452Arrangements 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
    • B23Q17/2457Arrangements 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 of tools
    • B23Q17/2466Diameter
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, 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
    • B23Q17/00Arrangements for observing, indicating or measuring on machine tools
    • B23Q17/24Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves
    • B23Q17/248Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves using special electromagnetic means or methods
    • B23Q17/249Arrangements for observing, indicating or measuring on machine tools using optics or electromagnetic waves using special electromagnetic means or methods using image analysis, e.g. for radar, infrared or array camera images

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Electromagnetism (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

The invention discloses a drill bit jitter analysis and outer diameter measurement device, which comprises a clamping unit, a first three-dimensional scale, a second three-dimensional scale, a third three-dimensional scale, a fourth three-dimensional scale, a display and an infrared reflection distance meter, wherein the first three-dimensional scale, the second three-dimensional scale, the third three-dimensional scale and the fourth three-dimensional scale are respectively arranged below one side of the clamping unit, the first three-dimensional scale and the second three-dimensional scale are oppositely arranged, the third three-dimensional scale and the fourth three-dimensional scale are oppositely arranged, the display is arranged above the middle parts of the first three-dimensional scale, the second three-dimensional scale, the third three-dimensional scale and the fourth three-dimensional scale, the infrared reflection distance meter is arranged on the lower surface of the display, defective products caused by defective drill bits can be avoided, the detection time is short, the defective rate is low, the cost is low, and the device can be used for mass production, processing and measurement, can meet the production requirement in time and has good market ownership value.

Description

Drill bit jitter analysis and outer diameter measurement device
Technical Field
The invention relates to the field of drill bit analysis, measurement and processing, in particular to a drill bit jitter analysis and outer diameter measurement device.
Background
In the existing life, a common lathe is matched with a drill bit, a table must be frequently drawn and corrected for accuracy, if the accuracy is required to be high, the table is often corrected once in less than one hour, the working time is reduced by a lot, and the efficiency is very poor; the existing drill bits are manufactured, the outer diameter is well determined, only an approximate caliper (error 0.Xmm) value or a caliper (error 0.0Xmm) used when a hole is drilled can be used, a go gauge quantity and a stop gauge quantity (error 0.00Xmm) are firstly used at a careful point, the detection time of the latter is longer, and the static measurement is needed, and the work is suspended; the drill bit is in the measurement and correction process, the time is long, the reject ratio is high, the cost is high, and the method is not suitable for mass production.
The prior art has defects and needs to be improved.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a drill bit jitter analysis and outer diameter measurement device.
The invention provides a technical document, and relates to a drill bit jitter analysis and outer diameter measurement device which comprises a clamping unit, a first three-dimensional scale, a second three-dimensional scale, a third three-dimensional scale, a fourth three-dimensional scale, a display and an infrared reflection distance meter, wherein the first three-dimensional scale, the second three-dimensional scale, the third three-dimensional scale and the fourth three-dimensional scale are respectively arranged below one side of the clamping unit, the first three-dimensional scale and the second three-dimensional scale are oppositely arranged, the third three-dimensional scale and the fourth three-dimensional scale are oppositely arranged, the display is arranged above the middle parts of the first three-dimensional scale, the second three-dimensional scale, the third three-dimensional scale and the fourth three-dimensional scale, and the infrared reflection distance meter is arranged on the lower surface of the display.
Preferably, surface mounting detects the alarm on the display, still set up the measurement camera on the display lower surface, and measure the camera with infrared reflection distancer parallel arrangement, detect the alarm with the display is connected for feedback infrared reflection distancer measuring result.
Preferably, the clamping unit body comprises a clamping fixing column and a clamping chuck, the clamping chuck is arranged in the middle of one end of the clamping fixing column and used for clamping drill bit jitter analysis and measurement.
Preferably, the first stereoscopic scale comprises a scale block, a first barcode and a second barcode, the first barcode and the second barcode are both arranged on the scale block, and the difference height between the first barcode and the second barcode is set to be 60 mm.
Preferably, the first barcode has the same structure as the second barcode, and the first barcode has a length of 200mm and a width of 30 mm.
A method for bit jitter analysis and outer diameter measurement apparatus comprising the steps of:
step s 1: before use, firstly, a drill bit is installed in a clamping chuck on a clamping unit, a machine is opened, and the clamping unit and a real machine start to work simultaneously;
step s 2: when the infrared reflection distance measuring instrument is used, an infrared laser is emitted out, the laser is aligned to the middle position of the drill bit, and the infrared reflection distance measuring instrument and the camera are in the same case, so that the outer diameter of the drill bit can be calculated through the size of the bar code in the video and the distance of the drill bit, and the analysis and measurement can be carried out as is without stopping in the measurement and analysis process;
step s 3: during measurement, the infrared reflection distance measuring instrument and a calculation display with a camera can utilize the three-dimensional ruler seen by the camera and the drill bit running change to obtain the drilling diameter and the shaking parameters of the drill bit from time to time, and the parameters are compared with the preset allowable error;
step s 4: and after the measurement is finished, the drill bit is taken down, and the display compares the measured diameter with the outer diameter parameter to finish the measurement, analysis and detection work.
Compared with the prior art, the invention has the advantages that the change of the outer diameter of the drill bit can be known without stopping the machine, thereby saving the working hours; the change of the outer diameter of the drill bit can be known without stopping the machine, so that defective products caused by poor drill bits can be avoided; the drill bit shaking status can be known to be improved in advance without stopping the machine, defective products caused by poor drill bits can be avoided, the detection time is short, the reject ratio is low, the cost is low, the drill bit shaking status can be used for mass production, processing and measurement, the production requirements can be met in time, and the drill bit shaking status has good market ownership value.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of a three-dimensional ruler structure according to the present invention;
FIG. 3 is a schematic view of the inner swing of the drill lens according to the present invention;
fig. 4 is a schematic structural diagram of the calculation principle of the present invention.
Detailed Description
The technical features mentioned above are combined with each other to form various embodiments which are not listed above, and all of them are regarded as the scope of the present invention described in the specification; also, modifications and variations may be suggested to those skilled in the art in light of the above teachings, and it is intended to cover all such modifications and variations as fall within the true spirit and scope of the invention as defined by the appended claims.
In order to facilitate an understanding of the invention, the invention is described in more detail below with reference to the accompanying drawings and specific examples. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for descriptive purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The present invention will be described in detail with reference to the accompanying drawings.
One embodiment of fig. 1-4: a drill bit jitter analysis and outer diameter measurement device comprises a clamping unit 1, a first three-dimensional scale 2, a second three-dimensional scale 3, a third three-dimensional scale 4, a fourth three-dimensional scale 5, a displayer 6 and an infrared reflection distance meter 7, wherein the first three-dimensional scale 2, the second three-dimensional scale 3, the third three-dimensional scale 4 and the fourth three-dimensional scale 5 are respectively arranged below one side of the clamping unit 1, the first three-dimensional scale 2 and the second three-dimensional scale 3 are oppositely arranged, the third three-dimensional scale 4 and the fourth three-dimensional scale 5 are oppositely arranged, the displayer 6 is arranged above the middle parts of the first three-dimensional scale 2, the second three-dimensional scale 3, the third three-dimensional scale 4 and the fourth three-dimensional scale 5, and the infrared reflection distance meter 7 is arranged on the lower surface of the displayer 6; further, as shown in fig. 2, the precise solid scale is two-step, and the two layers of planes are both provided with 200 × 30mm bar codes; the whole drill bit and more than three accurate three-dimensional rulers can be illuminated by adjusting the camera, as shown in the third figure; an infrared laser range finder is arranged on the edge of the camera and aims the red light beam at the middle of the drill bit; as shown in the figure IV, the distance between the accurate three-dimensional scale and the camera can be known according to the size of the accurate three-dimensional scale in the camera; the camera is provided with at least three accurate three-dimensional scales, the three accurate three-dimensional scales form a triangle, and the triangle is on the same plane. Each accurate three-dimensional scale has two layers, the distance between the two layers is fixed to be 60mm, and the maximum position, the minimum position and the effective length of the outer diameter of the drill bit can be judged by adding the distance between the drill bit and the camera case to two triangular planes; similarly, through the change of the front video image and the back video image, the shaking parameters of the drill bit can be calculated; as shown in fig. 4, 1 is a lens, 2 is a fixed shape, 3 is above the precision stereo scale, and 4 is below the precision stereo scale.
Preferably, a detection alarm is mounted on the upper surface of the display 6, a measurement camera is further arranged on the lower surface of the display 6 and arranged in parallel with the infrared reflection distance meter 7, and the detection alarm is connected with the display 6 and used for feeding back a measurement result of the infrared reflection distance meter 7; furthermore, the detection alarm is used for reacting and comparing with a preset allowable error, and immediately alarming to avoid producing defective products once the detection alarm normally operates under abnormal conditions, thereby achieving the purpose of the device; the distance between the accurate three-dimensional scale and the camera can be known by the size of the accurate three-dimensional scale in the camera, at least three accurate three-dimensional scales are arranged in the camera, a triangle is formed by the three accurate three-dimensional scales, and the triangle is on the same plane. Each accurate three-dimensional scale has two layers, the distance between two layers is fixed to be 60mm, and the maximum position, the minimum position and the effective length of the outer diameter of the drill bit can be judged by adding the distance between the drill bit and the camera case to two triangular planes.
Preferably, the body of the clamping unit 1 comprises a clamping fixing column and a clamping chuck 8, the middle of one end of the clamping fixing column is provided with the clamping chuck 8, and the clamping chuck 8 is used for analyzing and measuring the shaking of the clamping drill.
Preferably, the first stereoscopic scale 2 includes a scale block, a first barcode and a second barcode, the first barcode and the second barcode are both disposed on the scale block, and a difference height between the first barcode and the second barcode is set to be 60 mm.
Preferably, the first barcode and the second barcode have the same structure, and the length of the first barcode is set to 200mm, and the width of the first barcode is set to 30 mm; furthermore, the solid scale is two-step, and the two layers of planes are both provided with 200 × 30mm bar codes.
A method for bit jitter analysis and outer diameter measurement apparatus comprising the steps of:
step s 1: before use, firstly, a drill bit is installed in a clamping chuck 8 on a clamping unit 1, a machine is opened, and the clamping unit 1 and a real machine start to work simultaneously;
step s 2: when the infrared reflection distance measuring instrument is used, an infrared laser is emitted by the infrared reflection distance measuring instrument 7, the laser is aligned to the middle position of the drill bit, and the infrared reflection distance measuring instrument and the camera are in the same machine box, so that the outer diameter of the drill bit can be calculated through the size of the bar code in the video and the distance of the drill bit, and the analysis and measurement can be carried out as is without stopping in the measurement and analysis process;
step s 3: during measurement, the infrared reflection distance measuring instrument 7 and the calculation display 6 with the camera can obtain the drilling diameter and the shaking parameters of the drill bit by utilizing the three-dimensional ruler and the drill bit running change seen by the camera, compare the drilling diameter and the shaking parameters with the preset allowable error, and immediately alarm to distinguish good products from defective products once the drill bit normally runs under abnormal conditions;
step s 4: after the measurement is finished, the drill bit is taken down, the display 6 compares the measured diameter with the outer diameter parameter, and the measurement, analysis and detection work is finished.
The second embodiment is different from the above embodiments in that a drill bit jitter analysis and outer diameter measurement device can calculate the jitter parameters of the drill bit according to the change of two video images before and after the same process.
The third embodiment is different from the first embodiment in that the change of the outer diameter of the drill bit can be known without stopping the machine, so that the working hours are saved; knowing the change of the outer diameter of the drill bit can avoid the generation of defective products due to the bad drill bit; the situation of bit shaking is known to be improved in advance, so that defective products caused by poor drill bits can be avoided.
The technical features mentioned above are combined with each other to form various embodiments which are not listed above, and all of them are regarded as the scope of the present invention described in the specification; also, modifications and variations may be suggested to those skilled in the art in light of the above teachings, and it is intended to cover all such modifications and variations as fall within the true spirit and scope of the invention as defined by the appended claims.

Claims (6)

1. The utility model provides a drill bit shake analysis and external diameter measurement device, its characterized in that, includes clamping unit, first three-dimensional scale, second three-dimensional scale, third three-dimensional scale, fourth three-dimensional scale, display and infrared reflection distancer, clamping unit one side below sets up first three-dimensional scale, second three-dimensional scale, third three-dimensional scale and fourth three-dimensional scale respectively, first three-dimensional scale and second three-dimensional scale set up relatively, third three-dimensional scale and fourth three-dimensional scale set up relatively, the display set up in the middle part top of first three-dimensional scale, second three-dimensional scale, third three-dimensional scale and fourth three-dimensional scale, the lower surface of display sets up infrared reflection distancer.
2. The drill bit jitter analysis and outer diameter measurement device according to claim 1, wherein a detection alarm is installed on an upper surface of the display, a measurement camera is further arranged on a lower surface of the display and arranged in parallel with the infrared reflection distance meter, and the detection alarm is connected with the display and used for feeding back a measurement result of the infrared reflection distance meter.
3. The apparatus as claimed in claim 1, wherein the clamping unit comprises a clamping fixing column and a clamping chuck, the clamping chuck is disposed at a middle portion of one end of the clamping fixing column, and the clamping chuck is used for clamping the drill bit shake analysis and measurement.
4. The apparatus according to claim 1, wherein the first stereoscopic scale comprises a scale block, a first barcode and a second barcode, the first barcode and the second barcode are both disposed on the scale block, and a difference height between the first barcode and the second barcode is set to be 60 mm.
5. The apparatus as claimed in claim 4, wherein the first bar code is identical to the second bar code in structure, and the first bar code has a length of 200mm and a width of 30 mm.
6. A method for bit jitter analysis and outer diameter measurement, comprising the steps of:
step s 1: before use, firstly, a drill bit is installed in a clamping chuck on a clamping unit, a machine is opened, and the clamping unit and a real machine start to work simultaneously;
step s 2: when the infrared reflection distance measuring instrument is used, an infrared laser is emitted out, the laser is aligned to the middle position of the drill bit, and the infrared reflection distance measuring instrument and the camera are in the same case, so that the outer diameter of the drill bit can be calculated through the size of the bar code in the video and the distance of the drill bit, and the analysis and measurement can be carried out as is without stopping in the measurement and analysis process;
step s 3: during measurement, the infrared reflection distance measuring instrument and a calculation display with a camera can utilize the three-dimensional ruler seen by the camera and the drill bit running change to obtain the drilling diameter and the shaking parameters of the drill bit from time to time, and the parameters are compared with the preset allowable error;
step s 4: and after the measurement is finished, the drill bit is taken down, and the display compares the measured diameter with the outer diameter parameter to finish the measurement, analysis and detection work.
CN202210056132.0A 2022-01-18 2022-01-18 Drill bit jitter analysis and outer diameter measurement device Pending CN114453978A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210056132.0A CN114453978A (en) 2022-01-18 2022-01-18 Drill bit jitter analysis and outer diameter measurement device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210056132.0A CN114453978A (en) 2022-01-18 2022-01-18 Drill bit jitter analysis and outer diameter measurement device

Publications (1)

Publication Number Publication Date
CN114453978A true CN114453978A (en) 2022-05-10

Family

ID=81409679

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210056132.0A Pending CN114453978A (en) 2022-01-18 2022-01-18 Drill bit jitter analysis and outer diameter measurement device

Country Status (1)

Country Link
CN (1) CN114453978A (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0257965A2 (en) * 1986-08-18 1988-03-02 Fazlollah Samangooie Model making
CN101670533A (en) * 2009-09-25 2010-03-17 南京信息工程大学 Cutting-tool wear state evaluating method based on image analysis of workpiece machining surface
CN102303224A (en) * 2011-05-31 2012-01-04 哈尔滨工业大学 Device and method for integrally machining and measuring optical parts
TW201616256A (en) * 2014-08-07 2016-05-01 華爾特機械製造公司 Method and device for the determination of at least one model parameter of a virtual tool model of a tool
CN205497131U (en) * 2016-03-08 2016-08-24 河南理工大学 Improve compound plane grinding system of supersound ELID of oxide film quality
CN106670894A (en) * 2017-03-11 2017-05-17 河南理工大学 Ultrasonic torsional vibration measuring device and measuring method thereof
CN106825653A (en) * 2015-09-18 2017-06-13 绍尔有限公司 With reference to the coupled system that the main shaft equipment of lathe is used
CN107530878A (en) * 2015-05-13 2018-01-02 整形工具股份有限公司 For being directed system, the method and apparatus of instrument
CN207629315U (en) * 2017-12-25 2018-07-20 南京金炼科技有限公司 Metal fiber wire machine-shaping control device

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0257965A2 (en) * 1986-08-18 1988-03-02 Fazlollah Samangooie Model making
CN101670533A (en) * 2009-09-25 2010-03-17 南京信息工程大学 Cutting-tool wear state evaluating method based on image analysis of workpiece machining surface
CN102303224A (en) * 2011-05-31 2012-01-04 哈尔滨工业大学 Device and method for integrally machining and measuring optical parts
TW201616256A (en) * 2014-08-07 2016-05-01 華爾特機械製造公司 Method and device for the determination of at least one model parameter of a virtual tool model of a tool
CN107530878A (en) * 2015-05-13 2018-01-02 整形工具股份有限公司 For being directed system, the method and apparatus of instrument
CN106825653A (en) * 2015-09-18 2017-06-13 绍尔有限公司 With reference to the coupled system that the main shaft equipment of lathe is used
CN205497131U (en) * 2016-03-08 2016-08-24 河南理工大学 Improve compound plane grinding system of supersound ELID of oxide film quality
CN106670894A (en) * 2017-03-11 2017-05-17 河南理工大学 Ultrasonic torsional vibration measuring device and measuring method thereof
CN207629315U (en) * 2017-12-25 2018-07-20 南京金炼科技有限公司 Metal fiber wire machine-shaping control device

Similar Documents

Publication Publication Date Title
CN110207565B (en) Tool and method for measuring crankshaft assembling position degree of high-speed warp knitting machine
CN105806181A (en) Tooth thickness gauge for straight bevel gear
CN108592851B (en) Workpiece symmetry detection tool and detection method
CN211042065U (en) Barrel straightness detection ruler
CN113340238B (en) Detection method for detecting angles and positions of small inclined holes in large holes and small inclined holes of parts
CN208496739U (en) A kind of cutter measurement device of indexable insert tip, throw away tip grinding machine
CN104556660A (en) Height adjustment device for support column
CN114453978A (en) Drill bit jitter analysis and outer diameter measurement device
CN102554703A (en) Casting primary standard processing method capable of balancing finishing allowance
CN107462186A (en) 4th axle arrangement for measuring verticality and the 4th shaft flange end face squareness detection method
CN113074628A (en) Device and method for inspecting trimmed profile
CN106544765A (en) Weaving roving frame roller is every tool set pattern perpendicularity calibrating device
CN207585505U (en) A kind of verticality detector
CN109163686A (en) A kind of secondary flywheel comprehensive check tool measuring position of crankshaft hole
CN108398075A (en) Spinning frame central shaft positioning rule composition error calibration equipment and application method
CN114952417A (en) Detection calibrator for numerical control machine tool and detection calibration method thereof
CN108396419A (en) Spinning frame roller positions rule composition error calibration equipment and application method every tool
CN208223371U (en) Spinning frame central axis positioning rule composition error calibration equipment
CN100552373C (en) Cable diameter gauge in the oil pipe thread external thread
CN210981119U (en) Parallel roundness measuring instrument
CN208266347U (en) Spinning frame jockey pulley pedestal positioning rule composition error calibration equipment
CN209085507U (en) The device for fast detecting of inner bore chamfering depth
CN207414964U (en) A kind of measurement Groove-width check tool
CN105865307A (en) Workpiece inner diameter measurement tool and method
CN106907982B (en) Ocean platform spud leg roundness measuring tool

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20220510

RJ01 Rejection of invention patent application after publication