CN114322716B - Calibrating instrument for detecting contour error of upper sealing surface of threaded oil sleeve and calibrating method thereof - Google Patents
Calibrating instrument for detecting contour error of upper sealing surface of threaded oil sleeve and calibrating method thereof Download PDFInfo
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- CN114322716B CN114322716B CN202011046227.1A CN202011046227A CN114322716B CN 114322716 B CN114322716 B CN 114322716B CN 202011046227 A CN202011046227 A CN 202011046227A CN 114322716 B CN114322716 B CN 114322716B
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- 238000007789 sealing Methods 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000007514 turning Methods 0.000 claims abstract description 10
- 230000033001 locomotion Effects 0.000 claims abstract description 5
- 238000005259 measurement Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000012937 correction Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000005856 abnormality Effects 0.000 claims description 2
- 230000001915 proofreading effect Effects 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 5
- 238000007689 inspection Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000003209 petroleum derivative Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Abstract
The invention discloses a proofreading instrument and a proofreading method for detecting contour errors of an upper sealing surface of a threaded oil sleeve, wherein the proofreading instrument comprises a base, a pair of measuring arms are arranged on the base, the outer side surfaces of the measuring arms are working surfaces, and the top surfaces of the measuring arms are reference surfaces; and the working surface is provided with a sealing conical surface correcting surface and a cylindrical surface correcting surface adjacent to the sealing conical surface correcting surface. The invention can effectively judge whether the lathe loses motion in the process of turning the sealing curved surface of the pipe body, and causes reverse clearance errors.
Description
Technical Field
The invention relates to a pipe body thread processing technology of a threaded joint oil sleeve for petroleum and natural gas, in particular to a proofreading instrument and a proofreading method for detecting profile errors of an upper sealing surface of the threaded joint oil sleeve.
Background
The oil casing pipe products are materials which are necessary for petroleum and natural gas exploration and development, and each pipe is connected into a pipe column through threads to form a exploitation channel. Currently, the threaded connection mode adopted by oil casing products generally has two types, namely one is a standard connection mode (mainly comprising BTC, LC, SC, EU, NU and the like) corresponding to API SPEC 5B issued by the American Petroleum institute, and the other is a special threaded connection mode with high sealing capability. The special threaded joint is provided with a nose end (commonly called a sealing surface) at the front end of the thread, and the sealing surface between the male thread and the female thread plays a role in sealing high-pressure medium in a pipe through interference fit, so that the shape and the size of the profile of the sealing surface are extremely important for the special threaded joint, and the sealing capability of a product is directly influenced.
Currently, a tube mill ensures the quality of a sealing surface by means of parameter measurement and stamping. The parameter measurement is mainly carried out through a gauge and a checking seat frame, and the diameter size of the sealing surface is directly measured; the die is mainly used for rubbing the outline shape of the sealing surface through high-precision plasticine, and is compared with a standard template for inspection after being amplified by an optical microscope after being sliced. Because the stamp takes a long time and the inspection has hysteresis, the quality is controlled mainly by measuring the parameters of the sealing surface in the process of inspecting the stamp only as a head piece in production.
Referring to fig. 1, the sealing surface is machined by turning a path of a tool 1, and in this process, the numerically controlled lathe is switched in the axial direction, and if there is a reverse gap in the ball screw nut pair of the lathe, the dimension (the dimension of the sealing conical surface 2 and the dimension of the transition cylindrical surface 2) and the error of the curve appearance are very easy to form. However, the conventional parameter measurement is a punctiform measurement mode, and the morphology error caused by the reverse gap cannot be detected, so that a great hidden danger is definitely caused to the quality of the product.
Referring to fig. 2, the normal machined seal surface profile 100 is shown by an arrow in fig. 2, and when the lathe has a reverse gap, the machined shape shown by an arrow 101 in fig. 2 is very easy to appear, and if a conventional seal surface point measurement method is adopted, the measurement point is a point a in fig. 2, and the seal surface is shown to be smaller. The operator will raise the machining size by adjusting the cutter complement, i.e. the machining shape indicated by arrow 102 in fig. 2 is formed, the measuring point is point B in fig. 2, the measured value is qualified, but in practice, the overall contour shape of the sealing surface is completely out of design. However, if the measurement of the rear cylindrical surface is increased at this time, a problem of deviation is found.
In the prior patent application, as disclosed in patent application number 200810015377.9, a special threaded sleeve sealing surface taper measuring method is a scheme for measuring the punctiform diameter of a sealing surface, two contacts and a dial indicator are connected into a whole by using a connecting rod, and the diameter of a conical surface fixed point is measured, but the scheme cannot detect the shape error of the sealing surface.
The patent application 201120516876.3 discloses a measuring device for the sealing surface of a petroleum pipe coupling of a special threaded joint, which is also a scheme for measuring the punctiform diameter of the sealing surface, and uses a mounting frame to connect a spherical contact and a measuring meter into a whole to specially measure the diameter of a fixed point of a sealing conical surface in the coupling, but the scheme cannot detect the shape error of the sealing surface of the pipe body.
The patent application 201320685121.5 discloses a special threaded petroleum pipe end sealing surface inner diameter measuring device, which adopts a mode with a handle base and a sliding groove, is a device for measuring the end sealing inner diameter, and adopts a point measuring mode, but the scheme cannot detect the shape error of a pipe body sealing surface.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a proofreading instrument and a proofreading method for detecting the profile error of the sealing surface on a threaded oil sleeve, which can effectively judge whether the lathe loses movement in the process of turning a sealing curved surface of a pipe body to cause reverse clearance error.
In order to achieve the above purpose, the invention adopts the following technical scheme:
on one hand, the calibrating instrument for detecting the profile error of the upper sealing surface of the threaded oil sleeve comprises a base, wherein a pair of measuring arms are arranged on the base, the outer side surfaces of the measuring arms are working surfaces, and the top surfaces of the measuring arms are reference surfaces;
and the working surface is provided with a sealing conical surface correcting surface and a cylindrical surface correcting surface adjacent to the sealing conical surface correcting surface.
Preferably, the measuring arm is arranged at the end position of the base.
Preferably, the sealing conical surface alignment surface is located at the upper end position of the working surface.
Preferably, the cylindrical surface alignment surface is located at a position below the sealing conical surface alignment surface.
Preferably, the base and the measuring arm are both made of die steel materials.
Preferably, the surface hardness of the working surface is above 50 HRC.
On the other hand, the checking method for detecting the profile error of the sealing surface on the threaded oil sleeve is characterized in that by adopting the checking instrument and the contact type diameter measuring gauge, the diameter deviation of the sealing conical surface and the cylindrical surface on the pipe body of the oil sleeve product is checked, and whether the lathe sends a reverse gap error caused by the loss of movement in the process of turning the sealing curved surface of the pipe body is judged.
Preferably, the calibration method further comprises the steps of:
1) Fixing the extending distance of a contact by using a first contact type diameter measuring gauge, abutting against the reference surface at a position corresponding to the correcting surface of the sealing conical surface, and then rotating the first contact type diameter measuring gauge to clear a reading meter;
2) The clear first contact type diameter measuring gauge is used to be abutted against the end face of the oil sleeve product pipe body, then the first contact type diameter measuring gauge is rotated along the circumferential direction of the oil sleeve product pipe body, and the readings of the maximum deviation value and the minimum deviation value of the actual measurement of the sealing conical surface position on the oil sleeve product pipe body are recorded;
3) Fixing the extending distance of a contact by using a second contact type diameter measuring gauge, abutting against the reference surface at a position corresponding to the correction surface of the cylindrical surface, and then rotating the second contact type diameter measuring gauge to clear a reading meter;
4) The clear second contact type diameter measuring gauge is used to be abutted against the end face of the oil sleeve product pipe body, then the second contact type diameter measuring gauge is rotated along the circumferential direction of the oil sleeve product pipe body, and the readings of the maximum deviation value and the minimum deviation value of the actual measurement of the cylindrical surface position on the oil sleeve product pipe body are recorded;
5) Comparing the measured value of the sealing conical surface with the measured value of the cylindrical surface, if the difference between the sealing conical surface and the cylindrical surface is larger than a set standard, stopping immediately, and determining whether the reverse clearance of the lathe exceeds the standard by adopting the shape of the plasticine rubbing sealing surface.
The invention provides a proofreading instrument for detecting the profile error of a sealing surface on a threaded oil sleeve and a proofreading method thereof, which are designed by utilizing the characteristic of turning a tool path on the sealing surface, and can be used for simultaneously proofreading the diameters of a sealing conical surface and a transitional cylindrical surface, simultaneously measuring the actual deviation values of the conical surface and the cylindrical surface of a product, and rapidly and qualitatively judging whether reverse clearance abnormality is generated in the turning process according to the positive and negative and the difference values of the deviation values of the two. The calibrating method provides an adjusting basis for curve shape and quality of the sealing surface of the pipe body of the special threaded oil sleeve after stabilizing, and has wide application prospect in the field of turning of the pipe body of the special threaded oil sleeve.
Drawings
FIG. 1 is a schematic illustration of the sealing surface processing of a tubular body of a prior art oil casing product;
FIG. 2 is a seal face profile error schematic of the seal face of FIG. 1;
FIG. 3 is a schematic diagram of the structure of the proof reader of the present invention;
FIG. 4 is a schematic view of the corresponding positions of the proof reader of the present invention in use;
FIG. 5 is a schematic diagram of step 1) of the collation method of the present invention;
FIG. 6 is a schematic diagram of step 2) of the collation method of the present invention;
FIG. 7 is a schematic diagram of step 3) of the collation method of the present invention;
FIG. 8 is a schematic diagram of step 4) of the collation method of the present invention.
Detailed Description
The technical scheme of the invention is further described below with reference to the accompanying drawings and examples.
Referring to fig. 3, the calibration instrument for detecting the profile error of the sealing surface on the threaded oil sleeve provided by the invention adopts a seat frame form, and comprises a base 4, wherein measuring arms 5 are arranged at two ends of the base 4, the outer side surfaces of the measuring arms 5 are working surfaces, and the top surfaces of the measuring arms 5 are reference surfaces 501.
The upper end position of the working face is set as a sealing cone aligning face 6 and a cylindrical surface aligning face 7 adjacent to and below the sealing cone aligning face 6.
The base 4 is a plane placement base and can be stably placed on the table top of the operation table.
The size and shape of the sealing conical surface correcting surface 6 and the cylindrical surface correcting surface 7 are required to be consistent with the design of the sealing conical surface and the cylindrical surface of the measured oil sleeve product.
The calibrator is made of die steel materials, and is required to be subjected to aging treatment to ensure the stability of the final dimension.
The working surface is heat treated to have surface hardness over 50HRC, so as to ensure good wear resistance.
Referring to fig. 4, the invention also provides a checking method for detecting the profile error of the sealing surface on the threaded oil sleeve, which is used for checking the diameter deviation of the sealing conical surface and the cylindrical surface on the pipe body of the oil sleeve product by adopting the checking instrument and two contact type diameter measuring gauges, and judging whether the lathe sends a reverse clearance error caused by the lost motion in the process of turning the sealing curved surface of the pipe body.
The calibration method of the invention further comprises the following steps:
1) Using a first contact type diameter measuring gauge 8, enabling a conical fixed contact 10 of the first contact type diameter measuring gauge 8 to be close to a Z1 position 601 corresponding to a sealing conical surface correcting surface 6, fixing the extending distance of a measuring contact 11 on the first contact type diameter measuring gauge 8, guaranteeing that the Z1 position 601 corresponding to the sealing conical surface correcting surface 6 of the measuring contact 11 is close to an XO position 502 of a reference surface 501, then lightly rotating the first contact type diameter measuring gauge 8, and clearing a reading table 9, as shown in fig. 5;
2) Using the clear first contact type diameter measuring gauge 8 to be abutted against the end face of the oil sleeve product pipe body 12, then rotating the first contact type diameter measuring gauge 8 along the circumferential direction of the oil sleeve product pipe body 12, and recording the maximum and minimum deviation value readings of the actual measurement of the sealing conical surface position on the oil sleeve product pipe body 12, as shown in fig. 6;
3) Using a second contact type diameter measuring gauge 13, enabling a cylindrical fixed contact 14 of the second contact type diameter measuring gauge 13 to be close to a Z2 position 701 corresponding to a cylindrical surface correcting surface 7, fixing an extending distance of a measuring contact 15 on the second contact type diameter measuring gauge 13, guaranteeing that the Z2 position 701 corresponding to the cylindrical surface correcting surface 7 is close to an XO position 502 of a reference surface 501, then rotating the second contact type diameter measuring gauge 13, and clearing a reading table 16, as shown in fig. 7;
4) Using the clear second contact type diameter measuring gauge 13 to be abutted against the end face of the oil sleeve product pipe body 12, then rotating the second contact type diameter measuring gauge 13 along the circumferential direction of the oil sleeve product pipe body 12, and recording the readings of the maximum deviation value and the minimum deviation value of the actual measurement of the cylindrical surface position on the oil sleeve product pipe body 12, as shown in fig. 8;
5) And comparing the actual measurement values of the sealing conical surface and the cylindrical surface, if the difference between the sealing conical surface and the cylindrical surface is larger than a set standard, stopping immediately, and determining whether the reverse gap of the lathe exceeds the standard by adopting the shape of the sealing surface of the plasticine rubbing.
Examples
Referring to fig. 3 and 4, a special threaded oil pipe body with a diameter of 88.9mm is processed, a first contact type diameter measuring gauge is used, the extending distance of a contact is fixed to be 0.2mm, zero is calibrated at a Z1 position 601 of a sealing conical surface calibration surface 6, and then the oil pipe body is taken to an oil pipe product for inspection, and an offset value is read. And then using a second contact type diameter measuring gauge, fixing the extension distance of a contact to be 3.0mm, correcting zero at the Z2 position 701 of the cylindrical surface correction surface 7, taking the second contact type diameter measuring gauge to an oil pipe product for inspection, and reading out a deviation value. When the difference of the two deviation values is larger than 0.05mm, the deviation value exceeds the design tolerance range of the product, namely, the reverse clearance of the lathe is judged to be possibly too large, the machine is required to be stopped, and the shape of the sealing surface is rubbed by using the plasticine to determine whether the profile is abnormal or not.
It will be appreciated by persons skilled in the art that the above embodiments are provided for illustration only and not for limitation of the invention, and that variations and modifications of the above described embodiments are intended to fall within the scope of the claims of the invention as long as they fall within the true spirit of the invention.
Claims (6)
1. A calibration method for detecting contour errors of an upper sealing surface of a threaded oil sleeve by using a calibration instrument is characterized by comprising the following steps of: the calibrating instrument comprises a base, wherein a pair of measuring arms are arranged on the base, the outer side surfaces of the measuring arms are working surfaces, and the top surfaces of the measuring arms are reference surfaces;
the working surface is provided with a sealing conical surface correcting surface and a cylindrical surface correcting surface adjacent to the sealing conical surface correcting surface,
the calibrating method adopts a calibrating instrument and a contact type diameter measuring gauge to test the diameter deviation of the sealing conical surface and the cylindrical surface on the pipe body of the oil sleeve pipe product, judges whether the lathe generates reverse clearance error caused by the lost motion in the process of turning the sealing curved surface of the pipe body,
the proofing method further comprises the following steps:
1) Fixing the extending distance of a contact by using a first contact type diameter measuring gauge, abutting against the reference surface at a position corresponding to the correcting surface of the sealing conical surface, and then rotating the first contact type diameter measuring gauge to clear a reading meter;
2) The clear first contact type diameter measuring gauge is used to be abutted against the end face of the oil sleeve product pipe body, then the first contact type diameter measuring gauge is rotated along the circumferential direction of the oil sleeve product pipe body, and the readings of the maximum deviation value and the minimum deviation value of the actual measurement of the sealing conical surface position on the oil sleeve product pipe body are recorded;
3) Fixing the extending distance of a contact by using a second contact type diameter measuring gauge, abutting against the reference surface at a position corresponding to the correction surface of the cylindrical surface, and then rotating the second contact type diameter measuring gauge to clear a reading meter;
4) The clear second contact type diameter measuring gauge is used to be abutted against the end face of the oil sleeve product pipe body, then the second contact type diameter measuring gauge is rotated along the circumferential direction of the oil sleeve product pipe body, and the readings of the maximum deviation value and the minimum deviation value of the actual measurement of the cylindrical surface position on the oil sleeve product pipe body are recorded;
5) Comparing the measured value of the sealing conical surface with the measured value of the cylindrical surface, if the difference between the sealing conical surface and the cylindrical surface is larger than a set standard, stopping immediately, adopting the shape of a plasticine rubbing sealing surface to determine whether the reverse clearance of the lathe exceeds the standard,
the calibrating instrument simultaneously calibrates the diameters of the sealing conical surface and the transitional cylindrical surface,
and meanwhile, the actual deviation values of the conical surface and the cylindrical surface on one product are measured, and whether the turning process generates reverse clearance abnormality is rapidly and qualitatively judged according to the positive and negative and the difference values of the deviation values of the conical surface and the cylindrical surface.
2. The method for checking the profile error of the upper sealing surface of a threaded oil bushing according to claim 1, wherein: the measuring arm is arranged at the end part of the base.
3. The method for checking the profile error of the upper sealing surface of a threaded oil bushing according to claim 1, wherein: the sealing conical surface alignment surface is positioned at the upper end position of the working surface.
4. A method of calibrating a profile error of a sealing surface on a threaded oil bushing according to claim 3, wherein: the cylindrical surface correcting surface is positioned below the sealing conical surface correcting surface.
5. The method for checking the profile error of the upper sealing surface of a threaded oil bushing according to claim 1, wherein: the base and the measuring arm are made of die steel materials.
6. The method for checking the profile error of the upper sealing surface of a threaded oil bushing according to claim 1, wherein: the surface hardness of the working surface is above 50 HRC.
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| CN202011046227.1A CN114322716B (en) | 2020-09-29 | 2020-09-29 | Calibrating instrument for detecting contour error of upper sealing surface of threaded oil sleeve and calibrating method thereof |
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| CN202011046227.1A CN114322716B (en) | 2020-09-29 | 2020-09-29 | Calibrating instrument for detecting contour error of upper sealing surface of threaded oil sleeve and calibrating method thereof |
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