CN115077333A - Large-size precision measurement gauge and measurement method - Google Patents
Large-size precision measurement gauge and measurement method Download PDFInfo
- Publication number
- CN115077333A CN115077333A CN202210676210.7A CN202210676210A CN115077333A CN 115077333 A CN115077333 A CN 115077333A CN 202210676210 A CN202210676210 A CN 202210676210A CN 115077333 A CN115077333 A CN 115077333A
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- gauge
- dial indicator
- measuring
- main body
- standard
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- 238000005259 measurement Methods 0.000 title claims abstract description 29
- 238000000691 measurement method Methods 0.000 title description 5
- 238000000034 method Methods 0.000 claims abstract description 9
- 229910000954 Medium-carbon steel Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 3
- 230000000171 quenching effect Effects 0.000 claims description 3
- 238000005496 tempering Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims 1
- 239000010959 steel Substances 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 5
- 238000003754 machining Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
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Classifications
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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
- G01B5/08—Measuring arrangements characterised by the use of mechanical techniques for measuring diameters
Abstract
The invention discloses a large-size precision measurement checking fixture and a measuring method, wherein the checking fixture comprises a checking fixture body and a standard rod matched with the checking fixture body, at least one axial dimension of the standard rod is the same as the standard dimension of a measured object, the checking fixture body comprises a strip-shaped checking fixture main body, one end of the checking fixture main body is provided with a measuring anvil, the other end of the checking fixture main body is provided with a dial indicator, and a connecting line between the measuring anvil and a dial indicator head is positioned on the same straight line with the axis of the checking fixture main body.
Description
Technical Field
The invention relates to the technical field of auxiliary detection tools for machining, in particular to a large-size precision measurement gauge and a measurement method.
Background
The precision inspection and measurement of some large workpieces (the diameter is 1000mm and above) can hardly reach the precision of 0.02 mm. At present, no outside micrometer with the specification exists in the market, and the precision of the large-diameter caliper is nominally 0.1mm and 0.05 mm. There are three disadvantages to large diameter calipers in practical applications: firstly, nominal accuracy is not sufficient; secondly, the precision is invalid due to the bending deformation of the large caliper during measurement; thirdly, the operation is difficult, the detected size is uncertain and unstable due to different operators, and the use and technical requirements are not met.
Of course, electronic instruments for large-size precision measurements, such as three-coordinate measuring machines, also exist in the prior art. When the measuring instrument is used, a measured object needs to be installed on a measuring instrument platform, and measuring conditions are limited. Particularly, for a workpiece in the machining process, the workpiece needs to be detached from a machine tool and then measured, and the detaching process is complicated, time-consuming and labor-consuming.
Disclosure of Invention
The invention aims to solve the problem that a large-size workpiece cannot be measured in a high-precision manner in time through a gauge in the prior art, and provides a large-size precision measurement gauge and a measurement method.
In order to achieve the purpose, the invention adopts the following technical scheme:
a large-size precision measurement gauge comprises a gauge body and a standard rod matched with the gauge body.
Specifically, the gauge body comprises a strip-shaped gauge main body, one end of the gauge main body is provided with a measuring anvil, and the measuring anvil is connected with the gauge main body through a measuring anvil support. The other end of the checking fixture body is provided with a dial indicator, the dial indicator is connected with the checking fixture body through a dial indicator support, and the dial indicator is fixedly connected with the dial indicator support through a fastening screw. And a connecting line between the measuring anvil and the gauge head of the dial indicator and the axis of the gauge main body are positioned on the same straight line. The whole checking fixture is a checking fixture with a straight arch structure.
The measured object is placed between the measuring anvil and the dial gauge head for measurement. Before measurement, zero setting of the rule is carried out using a standard bar, at least one axial dimension of which is the same as the standard dimension of the object to be measured.
When the gauge is adjusted to zero, the standard rod is placed between the measuring anvil and the dial indicator head, the dial indicator is kept to have a certain eating depth, and the dial indicator is fixed on the dial indicator support through the fastening screw. And after the dial indicator is fixed, carrying out zero alignment of the dial indicator.
The standard rod meets the requirement of a measuring instrument through measurement of a high-precision three-coordinate instrument. Preferably, the standard rod is a stepped shaft rod, and different steps correspond to standard sizes of different measured objects to obtain a plurality of size sections.
Preferably, the measuring anvil is made of T10 material to meet the requirement of a measuring instrument.
Preferably, the checking fixture body is in threaded connection with the measuring anvil support and the checking fixture body is in threaded connection with the dial indicator support. The end parts of the measuring anvil support and the dial indicator support connected with the gauge main body are respectively provided with a threaded rod part. And two ends of the checking fixture main body are respectively provided with an internal thread hole which is in threaded connection with the threaded rod part of the support. The threaded rod parts of the measuring anvil support and the dial indicator support are in threaded fit connection with the inner threaded hole in the gauge main body. The threaded rod part is sleeved with a fastening nut for preventing looseness of threaded connection, and meanwhile, the length of the whole checking fixture is controlled by adjusting the combination length of the threaded rod part and the internal thread on the checking fixture main body. Wherein, the length range of the checking fixture main body is suitable for the measured size.
Preferably, the main rod of the checking fixture is made of thick-wall medium carbon steel, and the rigidity of bending resistance is good through quenching and tempering treatment, and the main rod of the checking fixture cannot deform slightly in self weight and measuring force. The internal thread holes at both ends are formed by turning.
The invention also provides a measuring method based on the gauge, which comprises the following steps:
s1: preparing a standard rod with the same size as the standard size of the measured object;
s2: using a standard rod for a ruler alignment between a dial indicator head and a measuring anvil;
s3: and placing the measured object between the dial indicator head and the anvil, reading the numerical value of the dial indicator, and adding the numerical value of the dial indicator and the length value of the standard rod to obtain the size of the measured object.
It is worth noting that the method is only applicable to the detection of lengths and diameters corresponding to standard rods.
The invention has the beneficial effects that:
1. the gauge is combined with the dial indicator through the standard rod and is used for precisely measuring the length and the diameter of a large-size workpiece, the measuring precision of the gauge can reach 0.02mm, and the gauge is practical in function, simple in structure and low in manufacturing cost.
2. The invention is convenient to use, can carry out precise size measurement on a large-size object to be measured fixed on a machine tool, and has little use limit.
3. The gauge can be used for measuring the lengths of different measured objects by combining standard rods with different lengths, and is good in applicability.
In summary, the invention provides a simple large-size checking fixture combining a standard rod and a dial indicator, which can replace a three-coordinate measuring instrument capable of performing precise detection to a certain extent to complete measurement of the length and the diameter of a workpiece, and is quick and convenient for measurement of the size of the workpiece in a machining process, and has great use value in actual machining.
Drawings
FIG. 1 is a schematic structural view of the large-size precision measurement gauge;
FIG. 2 is a schematic structural view of a side face of the large-size precision measurement gauge;
FIG. 3 is a schematic diagram of a standard rod;
FIG. 4 is a step diagram of the measuring method of the large-size precision measurement gauge.
In the figure: 1. a standard bar; 2. a measuring anvil bracket; 3. measuring the anvil; 4. fastening a nut; 5. a gauge main rod; 6. a dial indicator bracket; 7. fastening screws; 8. and (4) a dial indicator.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1
Referring to fig. 1-2, the large-size precision measurement gauge comprises a gauge body and a standard rod 1 matched with the gauge body.
Specifically, the gauge body comprises a strip-shaped gauge main body 5, one end of the gauge main body 5 is provided with a measuring anvil 3, and the measuring anvil 3 is connected with the gauge main body 5 through a measuring anvil support 2. The other end of the checking fixture main body 5 is provided with a dial indicator 8, and the dial indicator 8 is connected with the checking fixture main body 5 through a dial indicator bracket 6. Specifically, the measuring anvil 3 is fixedly arranged at one end, away from the checking fixture main body 5, of the measuring anvil support 2, and the dial indicator 8 is installed at one end, away from the checking fixture main body 5, of the dial indicator support 6. The end parts of the measuring anvil bracket 2 and the dial indicator bracket 6 connected with the gauge main body 5 are respectively provided with a threaded rod part. The two ends of the checking fixture body 5 are respectively provided with an internal thread hole which is in threaded connection with the threaded rod part of the support. The threaded rod parts of the measuring anvil support 2 and the dial indicator support 6 are in threaded fit connection with the internal threaded hole in the checking fixture body 5.
In this embodiment, the threaded rod portion is sleeved with the fastening nut 4 for locking of threaded connection, and meanwhile, the length of the whole checking fixture is controlled by adjusting the combination length of the threaded rod portion and the internal thread on the checking fixture main body 5. Wherein, the length of the checking fixture main body 5 is suitable for the measured size.
Further, a connecting line between the measuring anvil 3 and the gauge head of the dial indicator 8 and the axis of the gauge main body 5 are located on the same straight line. The whole checking fixture is a checking fixture with a straight arch structure.
The object to be measured is placed between the measuring anvil 3 and the gauge head of the dial gauge 8 for measurement. Before measurement, zero setting of the ruler needs to be carried out by using a standard bar 1, at least one axial dimension of the standard bar 1 being the same as the standard dimension of the object to be measured.
A measuring rod matching hole of a dial indicator 8 is formed in a dial indicator support 6 of the checking fixture, a fastening screw 7 is arranged on the side face of the matching hole, the fastening screw 7 is perpendicular to the axis of the measuring rod of the dial indicator 8, and the fastening screw 7 is used for fixing the position of the dial indicator 8.
When the gauge is adjusted to zero, the standard rod 1 is placed between the measuring anvil 3 and the dial indicator 8, the dial indicator 8 is kept to have an eating depth of 0.02mm, and the dial indicator 8 is fixed on the dial indicator bracket 6 through the fastening screw 7. After the dial indicator 8 is fixed, zero alignment of the dial indicator 8 is carried out.
The gauge can measure the size after the gauge is zeroed. The using method comprises the following steps: under the condition of room temperature, the measuring anvil 3 is attached to one surface of the measured workpiece, the head of the dial indicator 8 is attached to the other surface of the measured workpiece, the minimum value of the dial indicator 8 is found by micro-swing, and the value of the dial indicator 8 is added with the value of the standard rod at the moment to obtain a detection value. The numerical value of the dial indicator 8 can be positive or negative, and corresponds to the addition or subtraction of the value of the standard bar.
The standard rod 1 meets the requirements of measuring instruments through measurement of a high-precision three-coordinate instrument. Referring to fig. 3, the standard bar 1 in this embodiment is a three-step ladder bar, which can be obtained in A, B and C three-dimension sections.
In this embodiment, the measuring anvil 3 is made of T10 material, and is required to meet the measuring instrument requirement.
In the embodiment, the main rod 5 of the detection tool is made of thick-wall medium carbon steel, and is subjected to quenching and tempering, so that the bending rigidity is good, and the micro deformation cannot occur in the dead weight and the measuring force. The internal thread holes at the two ends of the checking fixture main rod 5 are formed by turning.
The manufacturing requirement of the checking fixture meets the requirement that the whole checking fixture is not deformed slightly in the self weight and the measuring force.
Example 2
Referring to fig. 4, the present embodiment provides a measurement method based on the gauge in embodiment 1, including the following steps:
s1: preparing a standard rod with the same size as the standard size of the measured object;
s2: using a standard rod for a ruler alignment between a dial indicator head and a measuring anvil;
s3: and placing the measured object between the dial indicator head and the anvil, reading the numerical value of the dial indicator, and adding the numerical value of the dial indicator and the length value of the standard rod to obtain the size of the measured object.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. A large-size precision measurement gauge is characterized by comprising a gauge body and a standard rod (1) matched with the gauge body;
at least one axial dimension of the standard rod (1) is the same as the standard dimension of the object to be measured;
the gauge body comprises a strip-shaped gauge main body (5), one end of the gauge main body (5) is provided with a measuring anvil (3), the measuring anvil (3) is connected with the gauge main body (5) through a measuring anvil support (2), the other end of the gauge main body (5) is provided with a dial indicator (8), the dial indicator (8) is connected with the gauge main body (5) through a dial indicator support (6), and a line between gauge heads of the measuring anvil (3) and the dial indicator (8) is located on the same straight line with an axis of the gauge main body (5).
2. The large-size precision measurement gauge according to claim 1, wherein the gauge body (5) and the anvil bracket (2) and the gauge body (5) and the dial indicator bracket (6) are respectively in threaded connection.
3. The large-size precision measurement gauge according to claim 2, wherein the dial indicator (8) is fixedly connected with the dial indicator bracket (6) through a fastening screw (7).
4. The large-size precision measurement gauge according to claim 1, wherein the standard rod (1) is a stepped shaft rod, and different steps correspond to standard sizes of different measured objects.
5. The measuring method of the large-size precision measurement gauge based on the claim 1, 2, 3 or 4 is characterized by comprising the following steps:
s1: preparing a standard rod with the same size as the standard size of the measured object;
s2: using a standard rod for zero setting of the ruler between the dial indicator head and the measuring anvil;
s3: and placing the measured object between the dial indicator head and the anvil, reading the numerical value of the dial indicator, and adding the numerical value of the dial indicator and the length value of the standard rod to obtain the size of the measured object.
6. The gauge and the measuring method for the large-size precision measurement according to the claims 1, 2, 3 or 4, characterized in that the main rod (5) of the gauge is made of thick-walled medium carbon steel and is subjected to quenching and tempering.
7. The gauge and the measuring method for the large-size precision measurement according to the claims 1, 2, 3 or 4, characterized in that the material of the measuring anvil (3) is T10 steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210676210.7A CN115077333A (en) | 2022-06-15 | 2022-06-15 | Large-size precision measurement gauge and measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210676210.7A CN115077333A (en) | 2022-06-15 | 2022-06-15 | Large-size precision measurement gauge and measurement method |
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| Publication Number | Publication Date |
|---|---|
| CN115077333A true CN115077333A (en) | 2022-09-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210676210.7A Pending CN115077333A (en) | 2022-06-15 | 2022-06-15 | Large-size precision measurement gauge and measurement method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101776429A (en) * | 2010-02-13 | 2010-07-14 | 桂林福达曲轴有限公司 | Check tool for measuring axial length of crank shaft and application thereof |
| CN102230775A (en) * | 2011-06-30 | 2011-11-02 | 无锡西姆莱斯石油专用管制造有限公司 | External thread gamut sealing face diameter measuring apparatus for oil well pipe |
| CN102338608A (en) * | 2011-08-25 | 2012-02-01 | 桂林福达曲轴有限公司 | Checking fixture for measuring axial dimension of crankshaft pin hole and detection method |
| CN204944377U (en) * | 2015-09-29 | 2016-01-06 | 莱芜环球汽车零部件有限公司 | Camshaft length detection tool |
| CN206648543U (en) * | 2017-03-06 | 2017-11-17 | 珠海市鑫达利模胚模具有限公司 | Measurer calibrates on-gauge plate |
| CN208860241U (en) * | 2018-09-13 | 2019-05-14 | 山东普测检测技术有限公司 | A kind of dial gauge calibrating installation |
-
2022
- 2022-06-15 CN CN202210676210.7A patent/CN115077333A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101776429A (en) * | 2010-02-13 | 2010-07-14 | 桂林福达曲轴有限公司 | Check tool for measuring axial length of crank shaft and application thereof |
| CN102230775A (en) * | 2011-06-30 | 2011-11-02 | 无锡西姆莱斯石油专用管制造有限公司 | External thread gamut sealing face diameter measuring apparatus for oil well pipe |
| CN102338608A (en) * | 2011-08-25 | 2012-02-01 | 桂林福达曲轴有限公司 | Checking fixture for measuring axial dimension of crankshaft pin hole and detection method |
| CN204944377U (en) * | 2015-09-29 | 2016-01-06 | 莱芜环球汽车零部件有限公司 | Camshaft length detection tool |
| CN206648543U (en) * | 2017-03-06 | 2017-11-17 | 珠海市鑫达利模胚模具有限公司 | Measurer calibrates on-gauge plate |
| CN208860241U (en) * | 2018-09-13 | 2019-05-14 | 山东普测检测技术有限公司 | A kind of dial gauge calibrating installation |
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Application publication date: 20220920 |