CN115682881A - Asymmetric three-point type inner diameter measuring tool and method - Google Patents
Asymmetric three-point type inner diameter measuring tool and method Download PDFInfo
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- CN115682881A CN115682881A CN202211150010.4A CN202211150010A CN115682881A CN 115682881 A CN115682881 A CN 115682881A CN 202211150010 A CN202211150010 A CN 202211150010A CN 115682881 A CN115682881 A CN 115682881A
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Abstract
The invention relates to an asymmetric three-point type inner diameter measuring tool and a method, belonging to the technical field of measuring tools; the device comprises a general inner diameter dial indicator as a measuring main body; the auxiliary measuring module is connected with a fixed measuring head of the universal internal diameter dial indicator through a lengthened connecting rod and comprises two self-adaptive telescopic measuring rod supporting legs, the root parts of the two self-adaptive telescopic measuring rod supporting legs are arranged at the tail end of the lengthened connecting rod, and the head parts of the two self-adaptive telescopic measuring rod supporting legs are in contact with a measuring surface; and the included angle between the two measuring rod supporting legs can be adjusted in an adaptive mode, and asymmetric point measurement can be achieved. The invention takes the universal inner diameter gauge as a measuring main body, and can ensure the measuring precision; the auxiliary measuring module is added on the basis of the measuring main body, namely two self-adaptive telescopic measuring rod supporting legs are added, and the angle between the two measuring rods is adjustable and locked. The measuring tool can measure the diameter of a side-cut window, an opening or an odd number of measuring points which are uniformly distributed but asymmetric after the diameter size required to be measured is calibrated by combining a special calibration ring.
Description
Technical Field
The invention belongs to the technical field of measuring tools, and particularly relates to an asymmetric three-point inner diameter measuring tool and a method.
Background
An inner diameter measuring tool is a measuring tool for measuring the diameter of an inner hole, and various measuring methods are disclosed in the prior art, and are listed as follows:
1. the existing general two-point measuring tools, such as a vernier caliper, an internal diameter dial indicator, an internal micrometer (two-jaw ruler) and the like, are used for measuring symmetrical point positions. The measurement can be carried out only corresponding to even number of ribs, symmetrical planes, symmetrical edges, complete inner and outer diameters and the like. Measurements cannot be made for side cutouts, openings, or asymmetric measurement points, etc.
2. The universal internal measuring (three-jaw) micrometer can be used for measuring the inner diameter of uniformly distributed measuring points which can be divided by three, but cannot measure the inner diameter of the measuring points which are uniformly distributed (5, 7, 11) and cannot be divided by three.
3. The fixed measuring size measuring tools such as the special plug gauge and the comprehensive gauge can only judge whether the processed size is within the range of a qualified tolerance zone. The specific numerical value cannot be measured in the machining process, and the feeding basis cannot be provided for subsequent machining. For parts with large inner hole diameters, the manufactured plug gauge is heavy, is difficult to operate by a single person, and has high requirements on the technical level of operators.
The existing universal two-point measuring tool or the universal three-point measuring tool can only be used for measuring corresponding to even number of measuring points, symmetrical planes, symmetrical edges, complete inner and outer diameters and the like. The measurement cannot be performed on side windows, openings or asymmetric measurement points and the like. The fixed dimension measuring tools such as a special plug gauge and a comprehensive gauge are customized, the qualified range of the machined measuring surface can be judged only, specific numerical values cannot be measured, and dimension basis cannot be provided for subsequent cutting in the machining process.
Disclosure of Invention
The technical problem to be solved is as follows:
in order to avoid the defects of the prior art, the invention provides an asymmetric three-point type inner diameter measuring tool and a method, wherein a universal inner diameter gauge is taken as a measuring main body, so that the measuring precision can be ensured; an auxiliary measuring module, namely two self-adaptive telescopic measuring rod supporting legs, is added on the basis of the measuring main body, and the angle between the two measuring rods is adjustable and locked. The measuring tool can measure the diameter of a side window, an opening or an odd number of uniformly distributed but asymmetric measuring points (such as 5, 7 and 11 ribs uniformly distributed) after the diameter size required to be measured is calibrated by combining a special calibration ring.
The technical scheme of the invention is as follows: an asymmetric three-point type inner diameter measuring tool comprises a general inner diameter dial indicator as a measuring main body; the auxiliary measuring module is connected with a fixed measuring head of the universal internal diameter dial indicator through a lengthened connecting rod;
the auxiliary measuring module comprises two self-adaptive telescopic measuring rod supporting legs, the root parts of the two self-adaptive telescopic measuring rod supporting legs are arranged at the tail ends of the lengthened connecting rods, and the head parts of the two self-adaptive telescopic measuring rod supporting legs are in contact with the measuring surface; and the included angle between the two measuring rod supporting legs can be adjusted in an adaptive mode, and asymmetric point measurement can be achieved.
The further technical scheme of the invention is as follows: the measuring rod supporting leg comprises a supporting leg, a pressure spring, a telescopic measuring rod and a contact; one end of the supporting leg is provided with a blind hole along the central shaft, a pressure spring and a telescopic measuring rod are coaxially arranged in the blind hole in sequence, the contact is coaxially arranged at the outer end of the telescopic measuring rod, the telescopic measuring rod and the contact can be self-adaptively stretched along the axial direction under the acting force of the pressure spring, and the contact is in contact with the measuring surface, determines the axial position and then is locked and fixed; scales are arranged on the peripheral surface of the telescopic measuring rod and used for measuring when the length is roughly adjusted;
the other ends of the two supporting legs are connected with the tail end of the lengthened connecting rod, the included angle between the two supporting legs of the measuring rod can be adjusted according to measuring requirements, and the included angle is determined and then locked and fixed.
The invention further adopts the technical scheme that: the other ends of the two support legs are both lug structures provided with through holes and are connected with the tail ends of the lengthened connecting rods through the bases; the base is of a U-shaped structure, and a fastening screw penetrates through the through hole in the bottom surface and is in threaded connection with the tail end of the lengthened connecting rod; the wall surface of one side of the base is provided with a unthreaded hole, the wall surface of the other side is provided with a threaded hole, the two lugs are inserted between the two side wall surfaces, and the through holes on the lugs are coaxial with the unthreaded hole and the threaded hole and are screwed and fixed through the coaxially arranged multifunctional locking rotating shaft.
The invention further adopts the technical scheme that: the head of the multifunctional locking rotating shaft is a clamping part, the middle part of the multifunctional locking rotating shaft is a polished rod shaft, the tail part of the multifunctional locking rotating shaft is provided with external threads, the multifunctional locking rotating shaft coaxially and sequentially penetrates through a polished hole of the base and through holes of the two lugs, is screwed into a threaded hole of the base, and is screwed after an angle is determined, so that the two measuring rod supporting legs are locked and fixed.
The further technical scheme of the invention is as follows: a cylindrical bulge is arranged on the outer end face of the bottom face of the base, and a through hole in the bottom face penetrates through the cylindrical bulge; the tail end of the lengthened connecting rod is provided with a threaded blind hole along the axial direction, an upper end light hole part in the threaded blind hole is matched and installed with the cylindrical bulge of the base, and the bottom end of the lengthened connecting rod is a threaded hole part; the fastening screw penetrates through the bottom surface of the base and the through hole of the cylindrical bulge, is screwed into the bottom end of the threaded blind hole, and fixedly connects the base with the tail end of the lengthened connecting rod; the cylindrical bulge arranged on the bottom surface enhances the connection strength of the fastening screw.
The further technical scheme of the invention is as follows: one end of the supporting leg is provided with a radial threaded hole, and a fastening screw is screwed into the threaded hole along the radial direction to apply radial pressure to the telescopic measuring rod, so that the axial position of the telescopic measuring rod can be fixed.
The further technical scheme of the invention is as follows: the auxiliary measuring module further comprises an arc angle indicating ruler, the arc angle indicating ruler is an arc-shaped flat plate structure with an angle marking line engraved on the surface, an arc-shaped through groove is formed between the inner arc surface and the outer arc surface of the arc angle indicating ruler, two fastening screws respectively penetrate through the arc-shaped through groove and are installed on two telescopic measuring rod supporting legs, the two fastening screws slide in the arc-shaped through groove to drive two telescopic measuring rod supporting legs to adjust the included angle, and after the included angle is determined, the arc angle indicating ruler is fixed and locked by screwing the two fastening screws.
The further technical scheme of the invention is as follows: the axial direction of the general inner diameter dial indicator is perpendicular to the plane where the central shafts of the two support legs of the self-adaptive telescopic measuring rod are located.
The invention further adopts the technical scheme that: the contact end of the contact and the measuring surface is of a spherical structure; and a plurality of pairs of spherical contacts with different lengths are arranged according to the measurement requirement.
A measuring method of an asymmetric three-point inner diameter measuring tool is characterized by comprising the following specific steps:
step 1: assembling a measuring tool;
selecting a lengthened connecting rod with a proper length according to the drawing requirements of a part to be tested, mounting a general internal diameter dial indicator at one end, and mounting a base at the other end; the two measuring rod supporting legs are hinged to the base through the multifunctional locking rotating shaft, and the arc angle indicating ruler and the multifunctional locking rotating shaft are locked and fixed after the included angle of the two measuring rod supporting legs is adjusted to accord with the position angle of the measured point;
step 2: calibrating the measuring tool;
after the measuring tool is assembled, the measuring tool is placed in the calibration ring; the supporting leg of the measuring rod is self-adaptively telescopic under the action of an internal pressure spring, after the contact is tightly attached to the inner wall of the calibration ring, the fastening screw arranged in the radial direction is screwed down to fix the axial position of the telescopic measuring rod, and the dial scale of the dial indicator is adjusted to be 0;
and step 3: measuring by a measuring tool;
after the measuring tool is calibrated, the measuring tool is put into a part to be measured which is being processed or is processed for inner diameter measurement; the measuring tool can measure the inner diameters of the side window, the opening or the uniformly distributed but asymmetric odd-numbered measuring points, and the reading difference can be directly used as the basis for feeding in subsequent processing.
Advantageous effects
The invention has the beneficial effects that: the asymmetric three-point type inner diameter measuring tool is provided with an auxiliary measuring module on a measuring main body, and the auxiliary measuring module measures asymmetric measuring points by adjusting the included angle between two self-adaptive telescopic measuring rod supporting legs. The self-adaptive telescopic measuring rod is connected with the telescopic measuring rod through a built-in pressure spring, the tail end of the telescopic measuring rod is provided with a spherical contact measuring head, and the contact head is attached to the measuring wall surface under the action force of the pressure spring; after the diameter size required to be measured is calibrated by the special calibration ring, the diameter measurement (such as 5, 7 and 11 ribs uniform distribution) can be carried out on the odd number of measurement points which are cut on the side surface, opened or uniformly distributed but not symmetrical.
After the measuring tool is adopted to measure the inner diameters (such as 5, 7 and 11 ribs) of the uniformly distributed but asymmetric measuring points, the reading of the measuring tool can be directly used as the basis for feeding in subsequent processing, a reliable measuring means is provided for the processing of the parts, and the qualification rate of the parts is improved. Meanwhile, the technical requirements on operators are reduced, the processing period of parts is shortened, and the production efficiency is improved.
In production practice, through the application of the side window, the opening shell and the end cover part in the branch factory, the measuring tool and the measuring method reduce the detection difficulty and improve the processing efficiency. The production cost of customizing a special plug gauge and three-coordinate detection equipment in the processing of the trial products is avoided.
Drawings
FIG. 1 is an exploded view of an asymmetric three-point inner diameter measurement gauge of the present invention;
FIG. 2 is an exploded isometric view of an asymmetric three-point inside diameter measurement gauge of the present invention;
FIG. 3 is an isometric view of a part assembly of an asymmetric three-point inside diameter measurement gauge of the present invention;
FIG. 4 is a schematic view of an asymmetric three-point inner diameter measurement tool according to the present invention;
description of reference numerals: 1. lengthening the connecting rod; 2. a base; 3. a multifunctional locking rotating shaft; 4. an arc angle indicating ruler; 5. a telescopic measuring rod; 6. a measuring rod supporting leg; 7. a spherical contact; 8. fastening screws; 9. a calibration ring; 10. a universal inner diameter dial indicator; 11. a pressure spring.
Detailed Description
The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used 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 thus, should not be considered as limiting the present invention.
In the machining of the side-cut window end cover parts produced in a branch factory, the asymmetric three-point type inner diameter measuring tool is adopted for measurement, so that the production cost of customizing a special plug gauge and three-coordinate detection equipment in the machining of a test product is avoided.
Referring to fig. 1-4, the asymmetric three-point type inner diameter measurement of the present invention includes a general inner diameter dial gauge 10, a lengthened connecting rod 1, and an auxiliary measurement module, wherein the general inner diameter dial gauge is used as a measurement main body; the auxiliary measuring module is connected with a fixed measuring head of the universal inside dial indicator through a lengthened connecting rod; the auxiliary measuring module comprises two self-adaptive telescopic measuring rod supporting legs 6, the root parts of the two self-adaptive telescopic measuring rod supporting legs are arranged at the tail end of the lengthened connecting rod 1, and the head parts of the two self-adaptive telescopic measuring rod supporting legs are in contact with a measuring surface; and the included angle between the two measuring rod supporting legs 6 can be adjusted in an adaptive manner, so that asymmetric point measurement can be realized.
The lengthened connecting rod 1 is of a hollow cylindrical step rod structure, and a connecting rod group with corresponding length can be selected for matching use according to different diameters of the parts to be measured. A key groove is formed in the outer circle of the step at the large end of the lengthened connecting rod 1 and can be directionally and fixedly connected with a flat key in the universal internal diameter dial indicator 10. The small end face is fixedly connected with the base 2 through the fastening screws 8, the key groove with the orientation effect on the small end face is fixedly connected with the base 2, and the two measuring rod supporting legs 6 can be horizontally and stably fixed on the same horizontal plane to guarantee the measuring accuracy.
The measuring rod supporting leg 6 comprises a supporting leg, a pressure spring 11, a telescopic measuring rod 5 and a spherical contact 7; one end of the supporting leg is provided with a blind hole along a central shaft, a pressure spring 11 and a telescopic measuring rod 5 are coaxially arranged in the blind hole in sequence, a spherical contact 7 is coaxially arranged at the outer end of the telescopic measuring rod 5, the telescopic measuring rod 5 and the spherical contact 7 can self-adaptively stretch along the axial direction under the acting force of the pressure spring 11, and the spherical contact 7 is in contact with a measuring surface, determines the axial position and then is locked and fixed; scales are arranged on the peripheral surface of the telescopic measuring rod 5 and used for measuring when the length is roughly adjusted; the other ends of the two support legs are both lug structures provided with through holes and are connected with the tail end of the lengthened connecting rod 1 through the base 2; one end of the supporting leg is provided with a radial threaded hole, and a fastening screw is screwed into the threaded hole along the radial direction to apply radial pressure to the telescopic measuring rod, so that the axial position of the telescopic measuring rod can be fixed.
The base 2 is of a U-shaped structure, and a fastening screw penetrates through a through hole in the bottom surface and is in threaded connection with the tail end of the lengthened connecting rod 1; a unthreaded hole is formed in one side wall face of the base 2, a threaded hole is formed in the other side wall face of the base, two lugs are inserted between the two side wall faces, through holes in the lugs are coaxial with the unthreaded hole and the threaded hole, and the lugs are screwed and fixed through a coaxially-mounted multifunctional locking rotating shaft 3. The head of the multifunctional locking rotating shaft 3 is a clamping part, the middle part is a polished rod shaft, the tail part is provided with external threads, the multifunctional locking rotating shaft coaxially and sequentially penetrates through a polished hole of the base and through holes of the two lugs, is screwed into a threaded hole of the base, and is screwed tightly after an angle is determined, so that the supporting legs of the two measuring rods are locked and fixed; the multifunctional locking rotating shaft 3 is processed into a fit size through grinding and quenching processes, and a straight-line-shaped structure is arranged on the end face of the clamping part of the multifunctional locking rotating shaft and used for manual locking. A cylindrical bulge is arranged on the outer end face of the bottom surface of the base 2, and a through hole in the bottom surface penetrates through the cylindrical bulge; the tail end of the lengthened connecting rod 1 is provided with a threaded blind hole along the axial direction, an upper end smooth hole part in the threaded blind hole is matched and installed with the cylindrical bulge of the base, and the bottom end is a threaded hole part; the fastening screw penetrates through the bottom surface of the base and the through hole of the cylindrical bulge, is screwed into the bottom end of the threaded blind hole, and fixedly connects the base with the tail end of the lengthened connecting rod; the cylindrical bulge arranged on the bottom surface enhances the connection strength of the fastening screw.
The auxiliary measuring module further comprises an arc angle indicating ruler 4, the arc angle indicating ruler 4 is an arc-shaped flat plate structure with angle marking lines engraved on the surface, an arc-shaped through groove is formed between the inner arc surface and the outer arc surface of the arc angle indicating ruler, two fastening screws respectively penetrate through the arc-shaped through groove to be installed on two telescopic measuring rod supporting legs, two fastening screws slide in the arc-shaped through groove to drive adjustment of an included angle between the telescopic measuring rod supporting legs, after the included angle is determined, fixing of the arc angle indicating ruler and locking of the included angle are achieved by tightening the two fastening screws, and coarse angle adjustment is completed.
Wherein the ball contacts 7 have pairs of contacts of different lengths. The fastening screw 8 is a hexagon head screw in a standard component and is used for fastening the lengthened connecting rod and the base. Or the head of the fastening screw 8 is a quincuncial head, and manual locking is used for locking the arc angle indicating ruler 4 and the telescopic measuring rod 5. The checking ring 9 is processed according to the basic size of the inner hole required by a drawing, and an actual numerical value is obtained through metering detection and used for subsequent size checking.
The product casing and its end cover that this embodiment measured are 11 muscle and windows, and this part internal diameter size can't direct measurement in the course of working, for follow-up feed provides the basis, causes part out of tolerance or scrap easily. The matched comprehensive gauge can only judge whether the current state of the part is qualified after the machining is finished, and cannot provide a specific trimming numerical value. After the measuring method is adopted, the reading can be directly used as the follow-up machining feed basis, the problem is solved smoothly, and the qualification rate of the shell of the model and the end cover part of the shell is greatly improved. The measuring tool and the measuring method provide a reliable measuring method for similar odd-number measuring point or asymmetric measuring point product pre-research. Meanwhile, the technical requirements on operators are reduced, the processing period of parts is shortened, and the production efficiency is improved.
Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that those skilled in the art may make variations, modifications, substitutions and alterations within the scope of the present invention without departing from the spirit and scope of the present invention.
Claims (10)
1. An asymmetric three-point inner diameter measuring tool comprises a general inner diameter dial indicator as a measuring main body; the method is characterized in that: the auxiliary measuring module is connected with a fixed measuring head of the universal internal diameter dial indicator through a lengthened connecting rod;
the auxiliary measuring module comprises two self-adaptive telescopic measuring rod supporting legs, the root parts of the two self-adaptive telescopic measuring rod supporting legs are arranged at the tail ends of the lengthened connecting rods, and the head parts of the two self-adaptive telescopic measuring rod supporting legs are in contact with the measuring surface; and the included angle between the two measuring rod supporting legs can be adjusted in an adaptive mode, and asymmetric point measurement can be achieved.
2. The asymmetric three-point inside diameter measurement gauge according to claim 1, wherein: the measuring rod supporting leg comprises a supporting leg, a pressure spring, a telescopic measuring rod and a contact; one end of the supporting leg is provided with a blind hole along a central shaft, a pressure spring and a telescopic measuring rod are coaxially arranged in the blind hole in sequence, the contact is coaxially arranged at the outer end of the telescopic measuring rod, the telescopic measuring rod and the contact can adaptively extend and retract along the axial direction under the action force of the pressure spring, and the contact is in contact with a measuring surface, is locked and fixed after determining the axial position; scales are arranged on the peripheral surface of the telescopic measuring rod and used for measuring when the length is roughly adjusted;
the other ends of the two supporting legs are connected with the tail end of the lengthened connecting rod, the included angle between the two supporting legs of the measuring rod can be adjusted according to measuring requirements, and the supporting legs are locked and fixed after the included angle is determined.
3. The asymmetric three-point inside diameter measurement gauge according to claim 2, wherein: the other ends of the two support legs are both lug structures provided with through holes and are connected with the tail ends of the lengthened connecting rods through the bases; the base is of a U-shaped structure, and a fastening screw penetrates through the through hole in the bottom surface and is in threaded connection with the tail end of the lengthened connecting rod; the base is provided with a unthreaded hole on one side wall surface and a threaded hole on the other side wall surface, two lugs are inserted between the two side wall surfaces, and the through holes on the lugs are coaxial with the unthreaded hole and the threaded hole and are screwed and fixed through a coaxially-mounted multifunctional locking rotating shaft.
4. The asymmetric three-point inside diameter measurement gauge according to claim 3, wherein: the head of the multifunctional locking rotating shaft is a clamping part, the middle part of the multifunctional locking rotating shaft is a polished rod shaft, the tail part of the multifunctional locking rotating shaft is provided with external threads, the multifunctional locking rotating shaft coaxially and sequentially penetrates through a polished hole of the base and through holes of the two lugs, is screwed into a threaded hole of the base, and is screwed after an angle is determined, so that the two measuring rod supporting legs are locked and fixed.
5. The asymmetric three-point inner diameter measurement gauge according to claim 3, wherein: a cylindrical bulge is arranged on the outer end face of the bottom face of the base, and a through hole in the bottom face penetrates through the cylindrical bulge; the tail end of the lengthened connecting rod is provided with a threaded blind hole along the axial direction, an upper end light hole part in the threaded blind hole is matched and installed with the cylindrical bulge of the base, and the bottom end of the lengthened connecting rod is a threaded hole part; the fastening screw penetrates through the bottom surface of the base and the through hole of the cylindrical bulge and is screwed into the bottom end of the threaded blind hole, and the base is fixedly connected with the tail end of the lengthened connecting rod; the cylindrical bulge arranged on the bottom surface enhances the connection strength of the fastening screw.
6. The asymmetric three-point inside diameter measurement gauge according to claim 2, wherein: one end of the supporting leg is provided with a radial threaded hole, and a fastening screw is screwed into the threaded hole along the radial direction to apply radial pressure to the telescopic measuring rod, so that the axial position of the telescopic measuring rod can be fixed.
7. The asymmetric three-point inner diameter measurement gauge according to any one of claims 1 to 6, wherein: the auxiliary measuring module further comprises an arc angle indicating ruler, the arc angle indicating ruler is an arc-shaped flat plate structure with an angle marking line engraved on the surface, an arc-shaped through groove is formed between the inner arc surface and the outer arc surface of the arc angle indicating ruler, two fastening screws respectively penetrate through the arc-shaped through groove and are installed on two telescopic measuring rod supporting legs, the two fastening screws slide in the arc-shaped through groove to drive two telescopic measuring rod supporting legs to adjust the included angle, and after the included angle is determined, the arc angle indicating ruler is fixed and locked by screwing the two fastening screws.
8. The asymmetric three-point inside diameter measurement gauge according to claim 7, wherein: the axial direction of the general inner diameter dial indicator is perpendicular to the plane where the central shafts of the two support legs of the self-adaptive telescopic measuring rod are located.
9. The asymmetric three-point inside diameter measurement gauge according to claim 1, wherein: the contact end of the contact and the measuring surface is of a spherical structure; and a plurality of pairs of spherical contacts with different lengths are arranged according to the measurement requirement.
10. A method for measuring the asymmetric three-point type inner diameter measuring tool according to claim 8 or 9, comprising the following steps:
step 1: assembling a measuring tool;
selecting a lengthened connecting rod with a proper length according to the drawing requirements of a part to be tested, mounting a general internal diameter dial indicator at one end, and mounting a base at the other end; the two measuring rod supporting legs are hinged to the base through the multifunctional locking rotating shaft, and the arc angle indicating ruler and the multifunctional locking rotating shaft are locked and fixed after the included angle of the two measuring rod supporting legs is adjusted to accord with the position angle of the measured point;
step 2: calibrating the measuring tool;
after the measuring tool is assembled, the measuring tool is placed into the calibration ring; the supporting leg of the measuring rod is self-adaptively telescopic under the action of an internal pressure spring, after the contact is tightly attached to the inner wall of the calibration ring, the fastening screw arranged in the radial direction is screwed down to fix the axial position of the telescopic measuring rod, and the dial scale of the dial indicator is adjusted to be 0;
and 3, step 3: measuring by a measuring tool;
after the measuring tool is calibrated, the measuring tool is put into a part to be measured which is being processed or is processed for inner diameter measurement; the measuring tool can measure the inner diameters of the side window, the opening or the uniformly distributed but asymmetric odd-numbered measuring points, and the reading difference can be directly used as the basis for feeding in subsequent processing.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116294899A (en) * | 2023-05-18 | 2023-06-23 | 山西电机制造有限公司 | Three-point type detection measuring tool and measurement method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116294899A (en) * | 2023-05-18 | 2023-06-23 | 山西电机制造有限公司 | Three-point type detection measuring tool and measurement method |
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