CN112648906A - Portable simple diameter measuring tool for large-diameter inner hole and using method thereof - Google Patents
Portable simple diameter measuring tool for large-diameter inner hole and using method thereof Download PDFInfo
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- CN112648906A CN112648906A CN202110026527.1A CN202110026527A CN112648906A CN 112648906 A CN112648906 A CN 112648906A CN 202110026527 A CN202110026527 A CN 202110026527A CN 112648906 A CN112648906 A CN 112648906A
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- hole
- diameter
- base
- dial indicator
- pointer type
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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
- G01B5/08—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters
- G01B5/12—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters internal diameters
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- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention relates to a portable simple diameter measuring tool for a large-diameter inner hole and a using method thereof, wherein the measuring tool comprises a base, a pointer dial gauge and a supporting rod; coaxial mounting through holes are arranged on the vertical edges at two sides of the base, and fastening threaded holes are arranged on the side parts of the mounting through holes at two sides; a sleeve of the pointer type dial indicator is inserted into the mounting through hole on one side, and a fastening screw is mounted in a fastening threaded hole corresponding to the mounting through hole on the side, so that the pointer type dial indicator is fixed on the base; a measuring head of the pointer type dial indicator faces the outer side of the base to form a measuring end which is in contact with the inner hole to be measured; the supporting rod consists of a rod body part and a supporting head part, the rod body part is inserted into the mounting through hole at the other side of the base, and a fastening screw is mounted in a fastening threaded hole corresponding to the mounting through hole at the side, so that the supporting rod is fixed on the base; the supporting head faces the outer side of the base to form a measuring end at the other side, which is in contact with the inner hole to be measured. The invention can realize high-precision measurement of the large-diameter hole.
Description
Technical Field
The invention belongs to the technical field of mechanical measurement, relates to a measuring technology of inner holes, and particularly relates to a portable simple diameter measuring tool for large-diameter inner holes and a using method thereof.
Background
At present, in the precision machining process of the inner hole with the size precision requirement of 0.001mm magnitude, an operator needs to continuously measure the diameter size of the inner hole, confirm the difference between the machined size and the designed size, then use the measured diameter size as the reference size for the next machining, and modify the machined size in a program according to the measured size, so as to ensure the requirement of the final diameter size precision of the inner hole. For the inner hole with the diameter smaller than 15cm, a portable measuring tool such as a diameter micrometer and a vernier caliper is generally adopted to complete the measurement. However, when the diameter of the inner hole is larger than 15cm, especially the diameter of the inner hole is more than 20cm, and the requirement for dimensional accuracy is high, for example, the size of the inner hole of the polar axis gyroscope support is large and cannot be matched, so the size control is strict, common portable measuring tools cannot meet the requirement for measuring range, and the following methods are generally adopted:
1. for the diameter measurement of the hole in the large diameter, the measurement depends on large-scale measuring equipment such as a three-coordinate measuring machine, a to-be-measured piece needs to be placed on a measuring platform in the measuring process, the operation of the equipment is complex, and a workshop worker cannot completely master the measurement.
2. An inner diameter dividing rod or an inner diameter dial indicator is used. The inside micrometer rod needs to be compared with the outside micrometer for measurement, the measurement reading is not visual, and the requirement on the technical level of an operator is high; when the inside dial indicator is used for measurement, the acting force is large, the part is easy to elastically deform, the measurement error is caused, and the reading precision of the dial indicator is 0.01mm, so that the part precision cannot be met.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a portable simple diameter measuring tool for large-diameter inner holes, which has the advantages of simple structure, convenience and quickness in operation, high precision, small measuring acting force, visual reading and capability of realizing quick measurement under the condition that the inner holes are not detached from a tool, and a using method thereof.
The above object of the present invention is achieved by the following technical solutions:
a portable simple diameter measuring tool for hole in major diameter which characterized in that: comprises a base, a pointer dial gauge and a supporting rod;
the base is of an integrated structure, two sides of the base are provided with parallel vertical edges, coaxial mounting through holes are formed in the vertical edges of the two sides of the base, and fastening threaded holes are formed in the side portions of the mounting through holes of the two sides of the base;
the sleeve of the pointer type dial indicator is inserted into the mounting through hole on one side of the base, and a fastening screw is mounted in a fastening threaded hole corresponding to the mounting through hole on the side, so that the pointer type dial indicator is fixed on the base; a measuring head of the pointer type dial indicator faces the outer side of the base to form a measuring end which is in contact with the inner hole to be measured;
the supporting rod consists of a rod body part and a supporting head part, and the supporting head part is a spherical head structure; the rod body part is inserted into the mounting through hole at the other side of the base, and a fastening screw is mounted in a fastening threaded hole corresponding to the mounting through hole at the side, so that the support rod is fixed on the base in an axially adjustable manner; the supporting head faces the outer side of the base to form a measuring end at the other side, which is in contact with the inner hole to be measured.
Further: the base is a U-shaped base.
A use method of a portable simple diameter measuring tool for a large-diameter inner hole is characterized by comprising the following steps: the diameter gauge based on the structure comprises the following steps:
one side of the pointer type dial indicator in the diameter measuring tool is fixed, and the fastening screw at one side of the supporting rod is loosened, so that the supporting rod can move in the mounting through hole at the side;
the method comprises the following steps of (1) adjusting the overhanging length of a supporting rod by taking a hole with a known size phi M close to a designed size as a standard, so that a connecting line of two measuring ends of a diameter measuring tool is vertically intersected with the axis of the hole, meanwhile, a supporting head of the supporting rod is contacted with one side of the hole, a side head of a pointer type dial indicator is contacted with the other side of the hole, the reading of the pointer type dial indicator is M, at the moment, a fastening screw for fixing the supporting rod is screwed, and the diameter size of the hole corresponding to the position of the pointer is recorded;
and 3, measuring the inner hole to be measured by the diameter measuring tool to obtain a reading value N of the pointer type dial indicator, and obtaining a diameter value of the inner hole to be measured by combining N and M according to the diameter phi M of the inner hole with the known size in the step 2, wherein the diameter measuring tool specifically comprises the following steps:
3.1 contacting the support head of the adjusted diameter measuring tool with one side of the hole to be measured, moving one end of the pointer type dial indicator up and down along the axial direction of the hole to be measured, stopping the diameter measuring tool at a position A with the maximum pointer reading, and at the moment, enabling a connecting line of the side head of the pointer type dial indicator and the support head of the support rod to be vertical to the axis of the hole;
3.2 moving one end of the diameter measuring tool pointer type dial indicator left and right along the section arc of the inner hole where the position A is located, stopping the measuring tool at the position B where the reading of the pointer is maximum, wherein the reading of the pointer type dial indicator is N;
and 3.3, obtaining the diameter phi N of the inner hole to be measured according to the diameter phi M of the inner hole with the size in the step 2, the reading value M of the pointer type dial indicator and the reading value N of the pointer type dial indicator in the step 3.2, wherein the diameter phi N is phi M + N-M.
The invention has the advantages and positive effects that:
(1) the support rod of the simple diameter measuring tool can be designed into various length sizes, the support rod with proper length can be selected according to the diameter of the hole to be measured, and the support rod is mounted on the base to measure the diameter of the hole with large diameter, so that the diameter range of the hole to be measured is very wide.
(2) The simple diameter measuring tool can directly extend into a hole in a workpiece to measure the aperture in the workpiece in a workpiece clamping state in the machining process, so that the large-diameter hole of the workpiece can be quickly and simply measured, the measuring part adopts a first pointer dial indicator, the measuring precision is ensured, and the measuring precision can reach 0.001 mm.
(3) In the process of measuring the diameter size of the large-diameter inner hole, the two measuring ends are in contact with the surface of the inner hole through the smooth curved surface, so that the surface of the inner hole is not scratched, and the smoothness of the surface of the inner hole is not influenced.
(4) The simple diameter measuring tool can directly obtain detection data through the dial plate of the pointer type dial indicator, and has the advantage of visual reading.
(5) The method is simple to operate in the process of measuring the diameter of the inner hole, has low requirements on the operation technology of workshop workers, and is wide in applicable range of operators.
Drawings
FIG. 1 is a schematic view of the overall structure of the simple diameter measuring tool of the present invention;
FIG. 2 is a schematic structural diagram of a base according to the present invention;
FIG. 3 is a schematic structural view of a support bar according to the present invention;
FIG. 4 is a schematic structural diagram of the pointer type dial indicator of the present invention;
fig. 5 is a schematic diagram of the principle of measuring the diameter of the inner hole according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments, which are illustrative only and not limiting, and the scope of the present invention is not limited thereby.
A portable simple diameter measuring tool for a large-diameter inner hole is mainly composed of a base 2, a supporting rod 3, a pointer type dial indicator 1 and a fastening screw 4, please refer to Figs. 1-5.
The base adopts and is provided with two parallel vertical edge integral type structures, for example U type base. The two vertical edges are respectively provided with a mounting through hole 2.1, the side parts of the two mounting through holes are respectively provided with a fastening threaded hole 2.2, the two mounting through holes have better coaxiality, and the fixed pointer type dial indicator and the support rod are respectively mounted in the two mounting through holes.
The sleeve 1.1 of the pointer type dial indicator is inserted into the mounting through hole on one side of the base, and a fastening screw is mounted in a fastening threaded hole corresponding to the mounting through hole on the side, so that the pointer type dial indicator is fixed. The measuring head 1.2 of the pointer type dial indicator faces the outer side of the base and is conveniently contacted with the inner hole to be measured, and a measuring end in one side contacted with the inner hole to be measured is formed.
The supporting rod is an integrated structure consisting of a rod body part 3.1 and a supporting head part 3.2, and the supporting head part is a spherical head structure. The body of rod part cartridge of bracing piece is to the installation through-hole of the base other end, installs holding screw in the holding threaded hole that this side installation through-hole corresponds, realizes the fixed to the bracing piece. The supporting head faces the outer side of the base, and is convenient to contact with the inner hole to be measured, and a measuring end at the other side contacting with the inner hole to be measured is formed. The supporting rod can adjust the overhanging distance of the supporting head according to the size to be measured.
The supporting rod can be designed into a plurality of length sizes, and the supporting rod can be suitable for measuring the diameter sizes of the inner holes in different diameter ranges when being installed on the base.
A use method of a portable simple diameter measuring tool for a large-diameter inner hole comprises the following steps:
one side of the pointer type dial indicator in the diameter measuring tool is fixed, and the fastening screw on one side of the supporting rod is loosened, so that the supporting rod can move in the mounting through hole on the side.
the method comprises the steps of using a hole with known size phi M close to the designed size as a standard, adjusting the overhanging length of a supporting rod to enable a connecting line of two measuring ends of a diameter measuring tool to be vertically intersected with the axis of the hole, enabling a supporting head of the supporting rod to be in contact with one side of the hole, enabling a side head of a pointer type dial indicator to be in contact with the other side of the hole, enabling the pointer type dial indicator to have a reading of M, screwing a fastening screw for fixing the supporting rod at the moment, and recording the diameter size of the hole corresponding to the position of the pointer.
3.1 contacting the support head of the adjusted diameter measuring tool with one side of the hole to be measured, moving one end of the pointer type dial indicator up and down along the axial direction of the hole to be measured, stopping the diameter measuring tool at a position A with the maximum pointer reading, and at the moment, enabling a connecting line of the side head of the pointer type dial indicator and the support head of the support rod to be vertical to the axis of the hole;
3.2 moving one end of the diameter measuring tool pointer type dial indicator left and right along the section arc of the inner hole where the position A is located, stopping the measuring tool at the position B where the reading of the pointer is maximum, wherein the reading of the pointer type dial indicator is N;
and 3.3, obtaining the diameter phi N of the inner hole to be measured according to the diameter phi M of the inner hole with the size in the step 2, the reading value M of the pointer type dial indicator and the reading value N of the pointer type dial indicator in the step 3.2, wherein the diameter phi N is phi M + N-M.
The invention can be used for processing parts containing large-diameter inner holes in the industries of aerospace, chemical engineering, water conservancy, electric power and the like, and particularly has very wide popularization and application prospects in the field of electrostatic navigator part processing.
Although the embodiments of the present invention and the accompanying drawings are disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and therefore the scope of the invention is not limited to the disclosure of the embodiments and the accompanying drawings.
Claims (3)
1. A portable simple diameter measuring tool for hole in major diameter which characterized in that: comprises a base, a pointer dial gauge and a supporting rod;
the base is of an integrated structure, two sides of the base are provided with parallel vertical edges, coaxial mounting through holes are formed in the vertical edges of the two sides of the base, and fastening threaded holes are formed in the side portions of the mounting through holes of the two sides of the base;
the sleeve of the pointer type dial indicator is inserted into the mounting through hole on one side of the base, and a fastening screw is mounted in a fastening threaded hole corresponding to the mounting through hole on the side, so that the pointer type dial indicator is fixed on the base; a measuring head of the pointer type dial indicator faces the outer side of the base to form a measuring end which is in contact with the inner hole to be measured;
the supporting rod consists of a rod body part and a supporting head part, and the supporting head part is a spherical head structure; the rod body part is inserted into the mounting through hole at the other side of the base, and a fastening screw is mounted in a fastening threaded hole corresponding to the mounting through hole at the side, so that the support rod is fixed on the base in an axially adjustable manner; the supporting head faces the outer side of the base to form a measuring end at the other side, which is in contact with the inner hole to be measured.
2. The portable simple diameter gauge for holes in large diameters according to claim 1, wherein: the base is a U-shaped base.
3. A use method of a portable simple diameter measuring tool for a large-diameter inner hole is characterized by comprising the following steps: the portable simple diameter gauge for a hole in a large diameter according to claim 1 or 2, comprising the steps of:
step 1, preparing a diameter measuring tool, specifically:
one side of the pointer type dial indicator in the diameter measuring tool is fixed, and the fastening screw at one side of the supporting rod is loosened, so that the supporting rod can move in the mounting through hole at the side;
step 2, measuring the inner hole with known size by using a diameter measuring tool to obtain a reading value M of the pointer type dial indicator, specifically:
the method comprises the following steps of (1) adjusting the overhanging length of a supporting rod by taking a hole with a known size phi M close to a designed size as a standard, so that a connecting line of two measuring ends of a diameter measuring tool is vertically intersected with the axis of the hole, meanwhile, a supporting head of the supporting rod is contacted with one side of the hole, a side head of a pointer type dial indicator is contacted with the other side of the hole, the reading of the pointer type dial indicator is M, at the moment, a fastening screw for fixing the supporting rod is screwed, and the diameter size of the hole corresponding to the position of the pointer is recorded;
and 3, measuring the inner hole to be measured by the diameter measuring tool to obtain a reading value N of the pointer type dial indicator, and obtaining a diameter value of the inner hole to be measured by combining N and M according to the diameter phi M of the inner hole with the known size in the step 2, wherein the diameter measuring tool specifically comprises the following steps:
3.1 contacting the support head of the adjusted diameter measuring tool with one side of the hole to be measured, moving one end of the pointer type dial indicator up and down along the axial direction of the hole to be measured, stopping the diameter measuring tool at a position A with the maximum pointer reading, and at the moment, enabling a connecting line of the side head of the pointer type dial indicator and the support head of the support rod to be vertical to the axis of the hole;
3.2 moving one end of the diameter measuring tool pointer type dial indicator left and right along the section arc of the inner hole where the position A is located, stopping the measuring tool at the position B where the reading of the pointer is maximum, wherein the reading of the pointer type dial indicator is N;
and 3.3, obtaining the diameter phi N of the inner hole to be measured according to the diameter phi M of the inner hole with the size in the step 2, the reading value M of the pointer type dial indicator and the reading value N of the pointer type dial indicator in the step 3.2, wherein the diameter phi N is phi M + N-M.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110026527.1A CN112648906A (en) | 2021-01-08 | 2021-01-08 | Portable simple diameter measuring tool for large-diameter inner hole and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110026527.1A CN112648906A (en) | 2021-01-08 | 2021-01-08 | Portable simple diameter measuring tool for large-diameter inner hole and using method thereof |
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| CN112648906A true CN112648906A (en) | 2021-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110026527.1A Pending CN112648906A (en) | 2021-01-08 | 2021-01-08 | Portable simple diameter measuring tool for large-diameter inner hole and using method thereof |
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| CN204924123U (en) * | 2015-07-27 | 2015-12-30 | 青岛软控精工有限公司 | Interior external diameter measuring tool |
| CN205482688U (en) * | 2016-01-28 | 2016-08-17 | 史弘明 | Multi -functional slide caliper makes up measuring tool |
| CN205664757U (en) * | 2016-06-07 | 2016-10-26 | 山东大学 | Measure instrument of work piece internal diameter |
| CN205718776U (en) * | 2016-06-17 | 2016-11-23 | 常州华德机械有限公司 | Major diameter inside and outside circle double-purpose test measuring device |
| CN208780088U (en) * | 2018-08-14 | 2019-04-23 | 南京双峰油泵油嘴有限公司 | Shallow stepped hole diameter measurement special gauge |
| CN211601819U (en) * | 2020-04-08 | 2020-09-29 | 江西中船航海仪器有限公司 | Precision measurement device for large and shallow holes of parts |
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2021
- 2021-01-08 CN CN202110026527.1A patent/CN112648906A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519339A (en) * | 2011-12-05 | 2012-06-27 | 安徽工业大学 | Measuring rod device for inner-ring raceway of pivoting support |
| KR101415912B1 (en) * | 2013-04-30 | 2014-07-14 | 주식회사 부경 | Apparatus for measuring inside and outside diameter |
| CN203286960U (en) * | 2013-06-21 | 2013-11-13 | 北京金风科创风电设备有限公司 | Tool for measuring shallow seam allowance inner diameter of wind generating set |
| CN203405153U (en) * | 2013-08-08 | 2014-01-22 | 安徽威能电机有限公司 | Internal diameter measuring dial gage used for inner hole detection of central spindle type workpieces |
| CN204313756U (en) * | 2015-01-14 | 2015-05-06 | 三峡大学 | The large diameter combined measuring tool of a kind of measurement |
| CN204535624U (en) * | 2015-04-20 | 2015-08-05 | 三峡大学 | A kind of extension bar type large diameter survey instrument |
| CN204924123U (en) * | 2015-07-27 | 2015-12-30 | 青岛软控精工有限公司 | Interior external diameter measuring tool |
| CN205482688U (en) * | 2016-01-28 | 2016-08-17 | 史弘明 | Multi -functional slide caliper makes up measuring tool |
| CN205664757U (en) * | 2016-06-07 | 2016-10-26 | 山东大学 | Measure instrument of work piece internal diameter |
| CN205718776U (en) * | 2016-06-17 | 2016-11-23 | 常州华德机械有限公司 | Major diameter inside and outside circle double-purpose test measuring device |
| CN208780088U (en) * | 2018-08-14 | 2019-04-23 | 南京双峰油泵油嘴有限公司 | Shallow stepped hole diameter measurement special gauge |
| CN211601819U (en) * | 2020-04-08 | 2020-09-29 | 江西中船航海仪器有限公司 | Precision measurement device for large and shallow holes of parts |
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Application publication date: 20210413 |
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