CN116105575A - Tooth width and gradual change measuring device and method for gradual change tooth width threads - Google Patents
Tooth width and gradual change measuring device and method for gradual change tooth width threads Download PDFInfo
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- CN116105575A CN116105575A CN202310094028.5A CN202310094028A CN116105575A CN 116105575 A CN116105575 A CN 116105575A CN 202310094028 A CN202310094028 A CN 202310094028A CN 116105575 A CN116105575 A CN 116105575A
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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
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
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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
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
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Abstract
The invention relates to a tooth width and gradual change measuring device of gradual change tooth width threads, which comprises a tooth width correcting block and a holding part, wherein the tooth width correcting block is fixedly arranged on one side of the holding part, the cross section of the tooth width correcting block is a tooth-shaped leading-in surface, a tooth width and a tooth-shaped bearing surface of a measuring device which are connected in sequence, and the joint of the tooth-shaped leading-in surface, the tooth-shaped bearing surface and the holding part forms a tooth side angle; the tooth width of the measuring device is the tooth width of the position of 1/3-2/3 of the distance between the threads to be measured and the end face, and the tooth width of the measuring device requires the manufacturing tolerance to be consistent with the design value of the measuring device during the manufacturing of the measuring tool; the invention is convenient to carry and measure and to measure, detect and check.
Description
Technical Field
The invention belongs to the technical field of special thread measuring tools for petroleum casings, and particularly relates to a tooth width and gradual change measuring device and method for gradual change tooth width threads.
Background
With the development of petroleum exploitation, the development difficulty is increased, the applied technology is higher and higher, and in recent years, a drilling and casing technology is required to be adopted aiming at some special well conditions, namely, a conventional oil casing is used as a drill rod, so that high torque resistance of the casing is required; in addition, high torque is required to be applied to assist casing running under some casing running blocking conditions; therefore, various manufacturers have developed a plurality of special oil sleeve joints with high torque resistance, and the conventional scheme is as follows: the thickness of the male-female contact shoulder is increased, but the thickness of the contact shoulder cannot be increased greatly due to the limitation of the size requirement of the drift diameter, and the ultimate over-torque value can only reach below 200% of the make-up torque.
In addition, the scheme is that the thread with the same pitch and gradual change tooth width is adopted, the tooth width of the male end thread and the female end thread of the thread is changed from the thread start to the thread tail according to certain same gradual change quantity. The tooth width of the male end thread is wider and the tooth width of the female end thread is narrower and narrower when seen from the direction from the male end to the screw tail. During hand tightening and machine tightening, the flank clearance of the male and female threads gradually decreases until contact and interference occurs. By means of the design, the male end tooth gradual change tooth width special buckling joint converts torque into tooth side contact stress borne by more than ten buckling threads, so that the torque resistance can be far higher than that of a conventional shoulder opposite-top type special buckling joint, but the production and measurement requirements are relatively high, and particularly the most critical tooth width and tooth width gradual change quantity determines the buckling position after the male end and the female end are screwed together and the allowable over-torque value. However, due to the gradual change effect of the tooth width, any thread can not be selected to be measured like a conventional fixed tooth width thread, and meanwhile, the negative angle and the taper of the tooth side of the thread also improve the difficulty of measurement, so that a convenient and accurate measuring device is required to ensure the accuracy of tooth width and gradual change measurement.
Disclosure of Invention
The invention solves the technical problems by adopting the following technical scheme:
the tooth width and gradual change measuring device of gradual change tooth width screw thread comprises a tooth width correction block and a holding part, wherein the tooth width correction block is fixedly arranged on one side of the holding part, the cross section of the tooth width correction block is a tooth-shaped leading-in surface, a tooth width and a tooth-shaped bearing surface of the measuring device which are connected in sequence, and the joint of the tooth-shaped leading-in surface, the tooth-shaped bearing surface and the holding part forms a tooth side angle;
the tooth width of the measuring device is the tooth width of the position of 1/3-2/3 of the distance between the threads to be measured and the end face, and the tooth width of the measuring device requires the manufacturing tolerance to be consistent with the design value of the measuring device during the manufacturing of the measuring tool.
Further, the two sides of the holding part form a depth gauge measuring plane in the longitudinal section direction of the tooth width correcting block.
Furthermore, the angular bisectors of the tooth-shaped leading-in surface and the tooth-shaped bearing surface of the tooth-width correction block form a matched tooth-shaped central datum line, the distance between the matched tooth-shaped central datum line and the measuring plane of the depth ruler is the distance between the tooth-shaped central line and the measuring plane, and the distance value requires the manufacturing tolerance to be consistent with the design value when the measuring tool is manufactured.
Furthermore, the thickness of the measuring device is 1.3-2mm, which not only ensures that the measuring result is not affected by the radian of the spiral line, but also ensures that the rigidity of the device is not easy to deform,
furthermore, the measuring device is made of stainless steel, and is formed by one-step machining through a linear cutting process.
The tooth width and gradual change amount measuring device of the gradual change tooth width thread is utilized to measure the tooth width and gradual change amount of the gradual change tooth width thread, and when the tooth width needs to be measured, a single measuring device M is used; when the tooth width gradient is required to be measured, two measuring devices are required to be matched for measurement, and the tooth widths of the measuring devices of the two measuring devices are different.
Specifically, when the tooth width needs to be measured, the method comprises the following steps:
and (3) rotationally moving the tooth width correction block of the measuring device M along the tooth space spiral line of the measured workpiece to the screw tail direction until the tooth width correction block is blocked and can not move continuously after being contacted with two sides of the tooth space, then obtaining the distance A between the end face of the measured male end thread or female end thread and the measuring plane of the depth gauge, obtaining the tooth width value at the distance between the center line of the A+ tooth form and the measuring plane, namely, the tooth width of the measuring device, and comparing the result with a design target and a tolerance to judge whether the measured workpiece is qualified or not.
When the tooth width gradual change is required to be measured, after the tooth width value is qualified, a measuring device N with different measuring devices is taken, then the workpiece is placed between teeth and screwed into the screw tail until the workpiece cannot move, the distance B between the end face of the measured male end screw thread or female end screw thread and the measuring plane of the depth gauge is obtained, the tooth width value at the distance between the center line of the B+ tooth form and the measuring plane can be obtained, namely the tooth width of the measuring device is obtained, the change quantity ratio of the tooth width of the unit length of the workpiece screw thread can be obtained through operation, and the result is compared with the design target and the tolerance to judge whether the workpiece is qualified or not.
The invention has the advantages and positive effects that:
compared with the existing measuring method, the method can very accurately measure the gradual change value of the gradual change thread of the tooth width, and can very accurately measure the tooth width value at a certain position; the operation is simple and easy to learn, the measurement result is obtained quickly, and other instruments such as a projection amplifier and the like are not needed to cooperate; the application range is wide, the same measuring tool can be used for both the male end and the female end, and can also be used for thread products with similar tooth shapes and different specifications; the manufacturing is simple and the manufacturing cost is low; the volume is small, the weight is light, and the carrying and the measurement are convenient; is not easy to wear and damage, and is convenient for metering, detecting and checking.
Drawings
The technical solution of the present invention will be described in further detail below with reference to the accompanying drawings and examples, but it should be understood that these drawings are designed for the purpose of illustration only and thus are not limiting the scope of the present invention. Moreover, unless specifically indicated otherwise, the drawings are intended to conceptually illustrate the structural configurations described herein and are not necessarily drawn to scale.
FIG. 1 is a schematic cross-sectional view of a device for measuring tooth width and gradual change of a gradual change tooth width thread according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a tooth width of a thread with a gradual change in tooth width according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a tooth width gradient of a thread for measuring a gradual tooth width according to an embodiment of the present invention;
Detailed Description
First, it should be noted that the following detailed description of the specific structure, characteristics, advantages, and the like of the present invention will be given by way of example, however, all descriptions are merely illustrative, and should not be construed as limiting the present invention in any way. Furthermore, any single feature described or implied in the embodiments mentioned herein, or any single feature shown or implied in the figures, may nevertheless be continued in any combination or pruning between these features (or equivalents thereof) to obtain still further embodiments of the invention that may not be directly mentioned herein. In addition, for the sake of simplicity of the drawing, identical or similar features may be indicated at one point in the same drawing.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.
As shown in fig. 1 to 3, the device for measuring the tooth width and the gradual change of the gradual change tooth width thread provided by the embodiment comprises a tooth width calibration block 1 and a holding part 3, wherein the tooth width calibration block 1 is fixedly arranged on one side of the holding part 3, the cross section of the tooth width calibration block 1 is provided with a tooth-shaped leading-in surface 7, a tooth width 6 and a tooth-shaped bearing surface 8 which are sequentially connected, and a tooth-side angle 9 is formed at the connection part of the tooth-shaped leading-in surface 7, the tooth-shaped bearing surface 8 and the holding part 3;
the tooth-shaped leading-in surface 7, the tooth-shaped bearing surface 8 and the tooth flank angle 9 are consistent with the threads to be measured, the tooth width 6 of the measuring device is the tooth width of the threads to be measured at the position 1/3-2/3 of the distance between the threads and the end surface, and the manufacturing tolerance of the tooth width 6 of the measuring device is consistent with the design value of the tooth width 6 during the manufacturing of the measuring tool.
It should be noted that the two sides of the gripping portion 3 form a depth gauge measuring plane 4 in the longitudinal section direction of the tooth width calibration block 1.
The angular bisectors of the tooth form leading-in surface 7 and the tooth form bearing surface 8 of the tooth width correction block 1 form a matched tooth form center datum line 2, the distance between the matched tooth form center datum line 2 and the depth gauge measuring plane 4 is the tooth form center line and measuring surface distance 5, and the distance value requires the manufacturing tolerance to be consistent with the design value when the measuring tool is manufactured.
The thickness of the measuring device is 1.3-2mm, the measuring result can be prevented from being influenced by the radian of the spiral line, the rigidity of the measuring device is prevented from being deformed easily, the measuring device is made of stainless steel, and the measuring device is formed by one-step machining through a linear cutting process.
The finger holding portion 3 is used for holding with fingers when screwing in, and is not limited to a specific structural shape.
The device for measuring the tooth width and the gradual change amount of the gradual change tooth width screw thread is used for measuring the tooth width and the gradual change amount of the gradual change tooth width screw thread: when the tooth width is required to be measured, a single measuring device M is used; when the tooth width gradient is required to be measured, two measuring devices are required to be matched for measurement, and the tooth widths 6 of the measuring devices are different. One is about one third of the tooth width from the thread end face, the other is about one half of the tooth width from the thread end face, and the rest parts are completely consistent.
When the tooth width needs to be measured, the specific method is as follows:
and (3) rotationally moving the tooth width correction block 1 of the measuring device M along the tooth space spiral line of the measured workpiece to the screw tail direction until the tooth width correction block is blocked and can not move continuously after being contacted with two sides of the tooth space, then obtaining the distance A between the end face of the measured male end thread or female end thread and the depth gauge measuring plane 4, obtaining the tooth width value at the distance 5 between the center line of the A+ tooth form and the measuring surface, namely, obtaining the tooth width of the measuring device, and comparing the result with the design target and the tolerance, thus judging whether the measured workpiece is qualified or not.
When the tooth width gradual change is required to be measured, after the tooth width value is qualified, a measuring device N with different measuring devices is taken, then the workpiece is placed between teeth and screwed into the screw tail until the workpiece cannot move, the distance B between the end face of the measured male end screw thread or female end screw thread and the depth gauge measuring plane 4 is obtained, the tooth width value at the distance 5 between the center line of the B+ tooth form and the measuring surface can be obtained, namely the tooth width of the measuring device is obtained, the change quantity ratio of the tooth width on the unit length of the workpiece screw thread can be obtained through operation, and the result is compared with a design target and tolerance, so that whether the workpiece is qualified or not can be judged.
For example, in this embodiment, the tooth widths of the two measuring devices are different when measuring the gradual change in the tooth width of the male-end or female-end variable-tooth-width threads, one is about one third of the tooth width from the end face of the thread, the other is about one half of the tooth width from the end face of the thread, and the rest are completely identical.
When the tooth width of the male end tooth width variable thread or the female end tooth width variable thread needs to be measured, as shown in fig. 2, the leading-in side of the device is close to the leading-in side of the gap between the workpiece thread teeth, the bearing side is close to the bearing side of the gap between the workpiece thread teeth, the device moves from the tail buckle direction to the end face and tries to be placed in each tooth space, the gap between the tooth spaces at the tail buckle is smaller and cannot be placed in the tooth space, and as the device moves towards the end face, the gap between the tooth spaces is bigger and bigger until the device can be placed in the device. After the device is placed, the whole device is rotated and moved along the spiral line of the interdental thread to the direction of the spiral tail until the device is blocked and can not move continuously after being contacted with the two sides of the interdental thread. Then using a depth gauge measuring tool to place a measuring plane on the end face of the male end thread or the female end thread, then gradually placing the ruler body until the end part of the ruler body contacts the position value depth gauge measuring plane 4 of the device, locking the ruler body, recording the degree A of the ruler body graduation, obtaining the tooth width value of the position (the distance between the tooth form center line of the reading A+ and the measuring surface is 5) as the tooth width a of the measuring device, and comparing the result with a design target and a tolerance to judge whether the workpiece is qualified or not.
When the tooth width gradient of the male end tooth width variable thread or the female end tooth width variable thread is required to be measured, as shown in fig. 3, after the tooth width value is measured, a device with the tooth width of one different measuring device is taken, the tooth width is about half of the tooth width at the position away from the end face of the thread, then the device is put into the tooth space of a workpiece by the same method and screwed into the thread tail until the workpiece cannot move, the tooth width value at the position (the distance between the tooth center line of the other position B+ and the measuring surface is measured by a depth gauge and is recorded as the tooth width B of the measuring device, the change quantity ratio of the tooth width of the workpiece thread in unit length can be obtained by dividing the value by the value (a-B), and whether the workpiece is qualified or not can be judged by comparing the result with the design target and the tolerance.
The foregoing examples illustrate the invention in detail, but are merely preferred embodiments of the invention and are not to be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (8)
1. Tooth width and gradual change measuring device of gradual change tooth width screw thread, its characterized in that: the tooth width calibration block is fixedly arranged on one side of the holding part, the cross section of the tooth width calibration block is provided with a tooth-shaped leading-in surface, a tooth width of a measuring device and a tooth-shaped bearing surface which are connected in sequence, and the joint of the tooth-shaped leading-in surface, the tooth-shaped bearing surface and the holding part forms a tooth side angle;
the tooth width of the measuring device is the tooth width of the position of 1/3-2/3 of the distance between the threads to be measured and the end face, and the tooth width of the measuring device requires the manufacturing tolerance to be consistent with the design value of the measuring device during the manufacturing of the measuring tool.
2. The tooth width and gradual change measurement device for gradual change tooth width threads according to claim 1, wherein two sides of the holding part form a depth gauge measurement plane in the longitudinal section direction of the tooth width calibration block.
3. The device for measuring the tooth width and the gradual change amount of the gradual change tooth width screw thread according to claim 2, wherein the angular bisectors of the tooth form leading-in surface and the tooth form bearing surface of the tooth width correction block form a matched tooth form center datum line, the distance between the matched tooth form center datum line and a depth gauge measuring plane is the distance between the tooth form center line and the measuring surface, and the distance value requires the manufacturing tolerance to be consistent with the design value when the measuring tool is manufactured.
4. The device for measuring the tooth width and the gradual change of the tooth width of the gradual change tooth width screw thread according to claim 1, wherein the thickness of the measuring device is 1.3-2mm.
5. The tooth width and gradual change measuring device for gradual change tooth width threads according to claim 1, wherein the measuring device is made of stainless steel and is formed by one-step processing through a linear cutting process.
6. A method for measuring the tooth width and the gradient of the gradual change tooth width thread by using the tooth width and gradient measuring device of the gradual change tooth width thread according to any one of claims 1 to 5, which is characterized in that,
when the tooth width is required to be measured, a single measuring device M is used; when the tooth width gradient is required to be measured, two measuring devices are required to be matched for measurement, and the tooth widths of the measuring devices of the two measuring devices are different.
7. The method for measuring the tooth width and the gradual change measuring device of the gradual change tooth width thread according to claim 6, wherein when the tooth width is required to be measured, the method comprises the following steps:
and (3) rotationally moving the tooth width correction block of the measuring device M along the tooth space spiral line of the measured workpiece to the screw tail direction until the tooth width correction block is blocked and can not move continuously after being contacted with two sides of the tooth space, then obtaining the distance A between the end face of the measured male end thread or female end thread and the measuring plane of the depth gauge, obtaining the tooth width value at the distance between the center line of the A+ tooth form and the measuring plane, namely, the tooth width of the measuring device, and comparing the result with a design target and a tolerance to judge whether the measured workpiece is qualified or not.
8. A method of measuring tooth width and a device for measuring tooth width by using the gradual change tooth width screw according to claim 7, wherein the method comprises the steps of:
when the tooth width gradual change is required to be measured, after the tooth width value is qualified, a measuring device N with different measuring devices is taken, then the workpiece is placed between teeth and screwed into the screw tail until the workpiece cannot move, the distance B between the end face of the measured male end screw thread or female end screw thread and the measuring plane of the depth gauge is obtained, the tooth width value at the distance between the center line of the B+ tooth form and the measuring plane can be obtained, namely the tooth width of the measuring device is obtained, the change quantity ratio of the tooth width of the unit length of the workpiece screw thread can be obtained through operation, and the result is compared with the design target and the tolerance to judge whether the workpiece is qualified or not.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310094028.5A CN116105575A (en) | 2023-02-10 | 2023-02-10 | Tooth width and gradual change measuring device and method for gradual change tooth width threads |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310094028.5A CN116105575A (en) | 2023-02-10 | 2023-02-10 | Tooth width and gradual change measuring device and method for gradual change tooth width threads |
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| Publication Number | Publication Date |
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| CN116105575A true CN116105575A (en) | 2023-05-12 |
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| CN202310094028.5A Pending CN116105575A (en) | 2023-02-10 | 2023-02-10 | Tooth width and gradual change measuring device and method for gradual change tooth width threads |
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| CN (1) | CN116105575A (en) |
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2023
- 2023-02-10 CN CN202310094028.5A patent/CN116105575A/en active Pending
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