CN111829480A - Method and device for measuring coaxiality of laminated connecting holes - Google Patents
Method and device for measuring coaxiality of laminated connecting holes Download PDFInfo
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- CN111829480A CN111829480A CN201910311029.4A CN201910311029A CN111829480A CN 111829480 A CN111829480 A CN 111829480A CN 201910311029 A CN201910311029 A CN 201910311029A CN 111829480 A CN111829480 A CN 111829480A
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- standard block
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/22—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes
- G01B21/24—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes for testing alignment of axes
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/10—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring diameters
- G01B21/14—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring diameters internal diameters
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- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a method for measuring coaxiality of laminated connecting holes, which comprises the following steps: preparing a standard block, wherein the main body of the standard block is an arched body, and the radius of an arc of the arched body is equal to that of the hole of the first layer of parts; attaching the arc surface of the standard block bow body to the wall of the connecting hole of the first layer of part, and measuring to obtain the diameter of the first layer of part hole; rotating and measuring to obtain a diameter value of the first group; keeping the hole wall of the connecting hole attached to the first layer of part, measuring the connecting hole of the second layer of part, and performing rotation measurement to obtain a diameter value of the second group; repeating the previous step to obtain a group of diameter values corresponding to each layer; and comparing the obtained difference with the maximum value of the first group to obtain different axial values of the connecting holes of each layer and the first layer of parts. The invention uses the standard block, and the measurement is accurate and convenient; the deviation direction and the deviation value of the hole are clear at a glance by recording the rotation angle and the corresponding measured value; the deviation condition data can be processed, and effective support is provided for subsequent analysis and treatment.
Description
Technical Field
The invention relates to the technical field of measurement, in particular to the technical field of hole coaxiality measurement.
Background
In the assembling process, the connecting piece mounting through holes of two or more layers of parts are connected, so that extra transverse stress brought to the connecting piece due to the reasons of wrong holes and the like is avoided, and the coaxiality between the holes is generally required to meet the requirement of a certain range.
The commonly used method for checking the coaxiality of the holes at present is to insert a pin rod with a specified diameter into the connecting hole, and if the pin rod can pass through the connecting hole, the coaxiality meets the requirement; if not, the coaxiality is not satisfied. However, the prior art has the following disadvantages:
firstly, the use method of the pin rod can be seen that the existing inspection method only can inspect whether the holes meet the requirements or not and cannot give specific deviation values;
secondly, data support of wrong hole amount cannot be provided for subsequent processing, and once the hole coaxiality does not meet the requirement, the subsequent processing is difficult;
and thirdly, the inspection is affected by stress, the degree of tightness of the inserted pin rod is different, the inspection result is different from person to person, and the conclusion is not completely consistent.
Disclosure of Invention
The method adopts a standard block and a matched measuring instrument to measure a maximum data value of each layer of connecting holes under the condition of installing the standard block, and calculates the deviation between the connecting holes of each layer according to the difference value of the data values to obtain the final coaxiality condition.
The invention relates to a method for measuring coaxiality of laminated connecting holes,
s1, preparing a standard block, wherein the main body of the standard block is an arched body, and the radius of an arc of the arched body is equal to that of the hole of the first layer of parts; the lower part of the standard block is provided with a step along the outer diameter of the arc surface;
s2, attaching the arc surface of the standard block bow to the hole wall of the connecting hole of the first layer of part;
s3, measuring the distance from the hole wall of the connecting hole of the first layer part to the bottom surface of the standard block by using an inner diameter measuring instrument to obtain the diameter of the first layer part hole;
s4, rotating the standard block and the measuring instrument to measure to obtain a first group of diameter values;
s5, keeping the arc surface of the standard block arc body attached to the hole wall of the connecting hole of the first layer of part, measuring the distance from the hole wall of the connecting hole of the second layer of part to the bottom surface of the standard block by using an inner diameter measuring instrument, and performing rotation measurement to obtain a diameter value of a second group;
s6, repeating the previous step to obtain a group of diameter values corresponding to each layer;
s7, comparing to obtain the maximum value of each group of diameter values, and calculating the difference with the maximum value of the first group to obtain the different axial values of the connecting holes of each layer and the first layer of parts.
The diameter of the hole is the distance from the wall of the connecting hole to the bottom surface of the standard block, and the height of the arch body of the standard block.
In the measuring process, an initial position is set, and during rotation measurement, a corresponding angle value and a diameter value of the connecting hole are recorded.
The standard block is provided with a handle.
The outer diameter of the arc surface at the lower part of the standard block is smaller than that of the arc surface at the upper part of the standard block.
A measuring device for coaxiality of laminated connecting holes comprises a standard block and a measuring instrument, wherein the main body of the standard block is an arched body, and the radius of an arc of the arched body is equal to that of a hole of a first layer of part; the lower part of the standard block is provided with a step along the outer diameter of the arc surface.
The invention has the following advantages:
1. by using the standard block, the standard block has a standard bottom surface, so that the measurement is accurate and convenient;
2. the deviation direction and the deviation value of the hole are clear at a glance by recording the rotation angle and the corresponding measured value;
3. the deviation condition data can be processed, and effective data support is provided for subsequent problem analysis and treatment.
Drawings
FIG. 1 is a schematic view of a measurement method.
Fig. 2 is a top view of the measurement method.
Fig. 3 is a perspective view of a standard block.
Fig. 4 is a second perspective view of the standard block.
Detailed Description
The invention will be further explained with reference to the drawings.
Example 1
Referring to fig. 1 to 4, the method for measuring coaxiality of laminated connecting holes comprises the following steps
S1, preparing a standard block 2, wherein the main body of the standard block 2 is an arched body, and the radius of an arc of the arched body is equal to that of the hole of the first layer of parts; the lower part of the standard block is provided with a step along the outer diameter of the arc surface;
s2, attaching the arc surface of the standard block bow to the hole wall of the connecting hole 5 of the first layer of part;
s3, measuring the distance from the hole wall of the connecting hole 5 of the first-layer part to the bottom surface 8 of the standard block by using the inner diameter measuring instrument 1 to obtain the diameter of the first-layer part hole;
s4, rotating the standard block 2 and the inner diameter measuring instrument 1 to measure to obtain a first group of diameter values;
s5, keeping the arc surface of the standard block 1 arch body attached to the hole wall of the connecting hole of the first layer of part, measuring the distance from the hole wall of the connecting hole of the second layer of part to the bottom surface of the standard block by using an inner diameter measuring instrument, and performing rotation measurement to obtain a diameter value of a second group;
s6, repeating the previous step to obtain a group of diameter values corresponding to each layer;
s7, comparing to obtain the maximum value of each group of diameter values, and calculating the difference with the maximum value of the first group to obtain the different axial values of the connecting holes of each layer and the first layer of parts.
A measuring device for coaxiality of laminated connecting holes comprises a standard block 2 and a measuring instrument 1, wherein the main body of the standard block 2 is an arched body, and the radius of an arched arc is equal to that of a hole of a first layer of part; the lower part of the standard block 2 is provided with a step along the outer diameter of the arc surface.
The standard block is provided with a handle 7, so that the operation of the rotary measuring process is more convenient.
The invention relates to a method for measuring coaxiality of laminated connecting holes, which utilizes a standard block 2, takes a connecting hole 5 of a first layer of parts as a reference, then respectively measures the maximum sizes d1, d2, d3,. dx of the connecting holes of each layer of parts, and calculates the difference of the measured values, namely the deviation value between the two values.
Example 2
Take two-layer parts as an example:
placing the standard block 2 in a connecting hole to be tested, and attaching the arc section to the hole wall of the hole 1 of the layer 1 part;
measuring the maximum hole size d1 of the hole 5 of the part on the layer 1 by using the measuring instrument 1;
measuring the maximum hole size d2 of the layer 2 part hole 6 by using the measuring instrument 1;
in order to ensure that the maximum value is measured during measurement, the standard block is attached to the hole wall of the connecting hole 5 during the whole measurement process, and the standard block and the measuring instrument are rotated until the maximum value is measured.
According to the measured values d1 and d2, the difference d between d1 and d2 is obtained, and the value d is the different axial value of the connecting hole 5 on the layer 1 part and the connecting hole 6 on the layer 2 part.
Example 3
Referring to fig. 1 to 4, the method for measuring coaxiality of laminated connecting holes comprises the following steps
S1, preparing a standard block 2, wherein the main body of the standard block 2 is an arched body, and the radius of an arc of the arched body is equal to that of the hole of the first layer of parts; the lower part of the standard block is provided with a step along the outer diameter of the arc surface; the outer diameter of the arc surface at the lower part of the standard block is smaller than that of the arc surface at the upper part of the standard block, so that the interference influence of a lower-layer connecting hole is eliminated;
s2, adhering the arc surface of the standard block bow to the connection of the first layer of parts, 5 hole walls;
s3, measuring the distance from the hole wall of the connecting hole 5 of the first layer part to the bottom surface 8 of the standard block by using the inner diameter measuring instrument 1 to obtain a first diameter value of the first layer part hole;
s4, the handle 7 is pulled to rotate by different angles, the standard block 2 and the inner diameter measuring instrument 1 are used for measuring, and the rotating angle and the corresponding diameter value are recorded;
s5, keeping the arc surface of the arch body of the standard block 1 attached to the hole wall of the connecting hole 5 of the first layer part, measuring the distance from the hole wall of the connecting hole 6 of the second layer part to the bottom surface 8 of the standard block 2 by using an inner diameter measuring instrument, and measuring by rotating different angles to obtain the rotating angle and the corresponding diameter value of the second group;
s6, repeating the previous step to obtain a group of diameter values corresponding to each layer;
s7, comparing the maximum value of each group of diameter values under different angles, and calculating the difference with the value of the first group of corresponding angles to obtain different axial values of the corresponding directions of the connecting holes of each layer and the first layer of parts.
Claims (6)
1. A method for measuring coaxiality of laminated connecting holes is characterized by comprising the following steps:
s1, preparing a standard block, wherein the main body of the standard block is an arched body, and the radius of an arc of the arched body is equal to that of the hole of the first layer of parts; the lower part of the standard block is provided with a step along the outer diameter of the arc surface;
s2, attaching the arc surface of the standard block bow to the hole wall of the connecting hole of the first layer of part;
s3, measuring the distance from the hole wall of the connecting hole of the first layer part to the bottom surface of the standard block by using an inner diameter measuring instrument to obtain the diameter of the first layer part hole;
s4, rotating the standard block and the measuring instrument to measure to obtain a first group of diameter values;
s5, keeping the arc surface of the standard block arc body attached to the hole wall of the connecting hole of the first layer of part, measuring the distance from the hole wall of the connecting hole of the second layer of part to the bottom surface of the standard block by using an inner diameter measuring instrument, and performing rotation measurement to obtain a diameter value of a second group;
s6, repeating the previous step to obtain a group of diameter values corresponding to each layer;
s7, comparing to obtain the maximum value of each group of diameter values, and calculating the difference with the maximum value of the first group to obtain the different axial values of the connecting holes of each layer and the first layer of parts.
2. The method as claimed in claim 1, wherein the diameter of the connecting hole is the distance from the wall of the connecting hole to the bottom surface of the standard block, plus the height of the bow of the standard block.
3. The method for measuring the coaxiality of the laminated connecting hole as claimed in claim 1, wherein in the measuring process, an initial position is set, and in the rotating measurement, a corresponding angle value and a diameter value of the connecting hole are recorded.
4. The method for measuring the coaxiality of the laminated connecting holes as claimed in claim 1, wherein the standard block is provided with a handle.
5. The method for measuring the coaxiality of the laminated connecting holes according to claim 1, wherein the outer diameter of the circular arc surface at the lower part of the standard block is smaller than that of the circular arc surface at the upper part of the standard block.
6. The device for measuring the coaxiality of the laminated connecting holes is characterized by comprising a standard block and a measuring instrument, wherein the main body of the standard block is an arched body, and the radius of an arched arc is equal to that of a hole of a first layer of part; the lower part of the standard block is provided with a step along the outer diameter of the arc surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910311029.4A CN111829480A (en) | 2019-04-18 | 2019-04-18 | Method and device for measuring coaxiality of laminated connecting holes |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910311029.4A CN111829480A (en) | 2019-04-18 | 2019-04-18 | Method and device for measuring coaxiality of laminated connecting holes |
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| CN111829480A true CN111829480A (en) | 2020-10-27 |
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| CN201910311029.4A Pending CN111829480A (en) | 2019-04-18 | 2019-04-18 | Method and device for measuring coaxiality of laminated connecting holes |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519345A (en) * | 2011-11-24 | 2012-06-27 | 陈寿权 | Coaxiality detection device of motor end cover |
| CN202676121U (en) * | 2012-07-20 | 2013-01-16 | 陈硕 | Coaxiality measurer for mandrel three-level excircles |
| CN203069130U (en) * | 2013-02-18 | 2013-07-17 | 陈硕 | Coaxiality measuring tool |
| CN105258623A (en) * | 2015-09-02 | 2016-01-20 | 宁夏共享精密加工有限公司 | Special-purpose tool for measuring coaxiality of inner bore and using method thereof |
| CN206177211U (en) * | 2016-11-16 | 2017-05-17 | 正道汽车配件（福州）有限公司 | Detect measuring tool of interior inclined plane of car draw in rod degree of depth |
-
2019
- 2019-04-18 CN CN201910311029.4A patent/CN111829480A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519345A (en) * | 2011-11-24 | 2012-06-27 | 陈寿权 | Coaxiality detection device of motor end cover |
| CN202676121U (en) * | 2012-07-20 | 2013-01-16 | 陈硕 | Coaxiality measurer for mandrel three-level excircles |
| CN203069130U (en) * | 2013-02-18 | 2013-07-17 | 陈硕 | Coaxiality measuring tool |
| CN105258623A (en) * | 2015-09-02 | 2016-01-20 | 宁夏共享精密加工有限公司 | Special-purpose tool for measuring coaxiality of inner bore and using method thereof |
| CN206177211U (en) * | 2016-11-16 | 2017-05-17 | 正道汽车配件（福州）有限公司 | Detect measuring tool of interior inclined plane of car draw in rod degree of depth |
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Application publication date: 20201027 |
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