CN105043221A - Method for measuring symmetry degree of bolt slot and tool clamp - Google Patents
Method for measuring symmetry degree of bolt slot and tool clamp Download PDFInfo
- Publication number
- CN105043221A CN105043221A CN201510302091.9A CN201510302091A CN105043221A CN 105043221 A CN105043221 A CN 105043221A CN 201510302091 A CN201510302091 A CN 201510302091A CN 105043221 A CN105043221 A CN 105043221A
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- CN
- China
- Prior art keywords
- bolt
- frock clamp
- counterbore
- flat recess
- measured
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The invention discloses a method for measuring the symmetry degree of a bolt slot and a tool clamp. The method comprises that the tool clamp which is specially used for measuring the symmetry degree of the bolt slot is processed, the tool clamp is cylindrical, and provided with a central hole whose one end includes a counterbore, during measurement, a bolt to be measured is inserted into the central hole through the end with the counterbore, the head of the bolt is sunk into the counterbore, a vernier caliper measures the vertical distance from one side of the slot to the highest point of the outer cylindrical surface of the tool clamp, the vertical distance from the other side of the slot to the highest point of the outer cylindrical surface of the tool clamp is measured in the same method, and the difference between measurement data is the symmetry degree of the slot relative to the rod portion of the bolt. Compared with a method in the prior art, the method is much simpler, the structure of the tool clamp is very simple, the measuring efficiency is greatly improved, and the measuring precision can be improved.
Description
Technical field
the present invention relates to a kind of measuring method and frock clamp of bolt flat recess symmetry, belong to machine parts measurement technical field.
Technical background
adopt with the following method during the symmetry in the current relative bar portion of measurement bolt flat recess: first on flat board, place V shape iron, then the bar portion of slotted bolt is placed in the V groove of V shape iron, swivel bolt makes flat recess be in horizontality.Again by the flat recess of clearance gauge inserting bolt; At V shape iron side erection dial framework, dial framework installs dial gauge; Measured the numerical value of clearance gauge upper surface by dial gauge, and record reading; And then bolt revolves turnback, measure the reading of clearance gauge another side as stated above, it is the symmetry of benchmark that the difference of twice reading is with bolt shank.Existing measuring method is cumbersome, and speed is slow, measures efficiency low.
Summary of the invention
goal of the invention of the present invention is: the measuring method and the frock clamp that provide a kind of bolt flat recess symmetry, measures the inefficient technical matters of bolt flat recess symmetry, thus overcome the deficiencies in the prior art to solve prior art.
technical scheme of the present invention is achieved in that
the measuring method of a kind of bolt flat recess symmetry of the present invention is, the method first processes the frock clamp being specifically designed to and measuring bolt flat recess symmetry, and this frock clamp is cylindrical, and frock clamp is provided with center pit, and center pit one end is counterbore; During measurement, bolt to be measured is inserted in center pit from counterbore one end of frock clamp, and make bolt head sink in counterbore, by one of them trough rim of vernier caliper measurement flat recess vertical range to frock clamp external cylindrical surface peak, then use the same method and measure the vertical range of another trough rim of flat recess to frock clamp external cylindrical surface peak, the difference of twice measurement data is the symmetry of flat recess relative to bolt shank.
of the present invention a kind of frock clamp according to said method formation and for said method is that this frock clamp is right cylinder, and frock clamp is provided with center pit, is provided with counterbore in center pit one end.
in aforementioned frock clamp, described counter bore hole diameters is greater than bolt head diameter to be measured, and the counterbore degree of depth is greater than bolt head thickness to be measured.
owing to have employed technique scheme, compared with prior art, method of the present invention is simply more than the method for prior art in the present invention, and Tool clamp structure used is also very simple, not only improves measurement efficiency greatly, and can improve measuring accuracy.
figure of description
fig. 1 is method schematic diagram of the present invention;
fig. 2 is the present invention's frock clamp used;
fig. 3 is the structural representation of the present invention's bolt to be measured;
fig. 4 is the measuring method schematic diagram of prior art.
being labeled as in accompanying drawing: 1-frock clamp; 2-center pit; 3-counterbore; 4-bolt to be measured; 5-vernier caliper; 6-flat recess; 7-workbench; 8-V shape iron; 9-clearance gauge; 10-dial framework; 11-dial gauge.
Embodiment
Embodiment
fig. 3 is the structural representation of this routine bolt to be measured, and as seen from Figure 3, bolt 4 to be measured is hex bolts, the bolt head of hex bolts has a flat recess 6 being symmetrical in bolt, and this flat recess is exactly the object that this example will carry out measuring.The method of this example is for measuring the symmetry of flat recess relative to bolt shank.
fig. 4 is the measuring method schematic diagram of prior art, as seen from Figure 4, the measuring method of prior art is: first on workbench 7, place V shape iron 8, then the bar portion of bolt 4 to be measured is placed in the V-shaped groove of V shape iron, rotates bolt 4 to be measured and makes flat recess 6 be in horizontality.Again clearance gauge 9 is inserted in the flat recess 6 of bolt 4 to be measured; At V shape iron side erection dial framework 10, dial framework is installed dial gauge 11; Measured the numerical value of clearance gauge upper surface by dial gauge, and record reading; And then bolt 4 to be measured is revolved turnback, measure the reading of clearance gauge 9 another side as stated above, it is the symmetry of benchmark that the difference of twice reading is with bolt shank.Existing measuring method is cumbersome, and speed is slow, measures efficiency low.
fig. 1 is measuring method schematic diagram of the present invention, and measuring method of the present invention is: utilize frock clamp 1 to complete the measurement of flat recess relative to bolt shank symmetry.Concrete measuring method is, bolt 4 to be measured is inserted in center pit 2 from counterbore 3 one end of frock clamp 1, and make bolt head sink in counterbore, the vertical range of one of them trough rim to frock clamp external cylindrical surface peak of flat recess 6 is measured with vernier caliper 5, then use the same method and measure the vertical range of another trough rim of flat recess to frock clamp external cylindrical surface peak, the difference of twice measurement data is the symmetry of flat recess relative to bolt shank.
fig. 2 is the present invention's frock clamp used.Frock clamp 1 is right cylinder, and frock clamp 1 is provided with center pit 2, and center pit 2 one end is provided with counterbore 3.Counterbore 3 diameter is greater than bolt head diameter to be measured, and counterbore 3 degree of depth is greater than bolt head thickness to be measured.
supplementary notes of the present invention
because frock clamp machining precision of the present invention directly can affect the accuracy of measurement result, therefore adding man-hour, size and smoothness requirements should strictly by designing requirement processing.Material hardness should be greater than the hardness of bolt to be measured in addition, improves wearing quality.
in addition when measuring, should guarantee that vernier caliper 5 is stuck in flat recess mid point and the cylindrical peak of frock clamp, to guarantee measuring accuracy.
Claims (3)
1. a measuring method for bolt flat recess symmetry, is characterized in that: the method first processes the frock clamp being specifically designed to and measuring bolt flat recess symmetry, and this frock clamp is cylindrical, and frock clamp is provided with center pit, and center pit one end is counterbore; During measurement, bolt to be measured is inserted in center pit from counterbore one end of frock clamp, and make bolt head sink in counterbore, by one of them trough rim of vernier caliper measurement flat recess vertical range to frock clamp external cylindrical surface peak, then use the same method and measure the vertical range of another trough rim of flat recess to frock clamp external cylindrical surface peak, the difference of twice measurement data is the symmetry of flat recess relative to bolt shank.
2. for a frock clamp for method described in claim 1, it is characterized in that: described frock clamp (1) is right cylinder, frock clamp (1) is provided with center pit (2), be provided with counterbore (3) in center pit (2) one end.
3. frock clamp according to claim 2, it is characterized in that: described counterbore (3) diameter is greater than bolt head diameter to be measured, counterbore (3) degree of depth is greater than bolt head thickness to be measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510302091.9A CN105043221A (en) | 2015-06-05 | 2015-06-05 | Method for measuring symmetry degree of bolt slot and tool clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510302091.9A CN105043221A (en) | 2015-06-05 | 2015-06-05 | Method for measuring symmetry degree of bolt slot and tool clamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105043221A true CN105043221A (en) | 2015-11-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510302091.9A Pending CN105043221A (en) | 2015-06-05 | 2015-06-05 | Method for measuring symmetry degree of bolt slot and tool clamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105043221A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547110A (en) * | 2015-12-14 | 2016-05-04 | 中国航空工业标准件制造有限责任公司 | Measuring tool for measuring size of spherical surface high-lock nut assembly components |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1525430A1 (en) * | 1987-09-18 | 1989-11-30 | В. А. Озерский | Device for measuring symmetry of shaft key slot |
| CN203116653U (en) * | 2013-03-21 | 2013-08-07 | 航天精工有限公司 | Composite gauge for measuring countersunk bolt P value |
| CN103245281A (en) * | 2013-05-03 | 2013-08-14 | 徐州工业职业技术学院 | Device and method for measuring symmetry degree of key groove of shaft |
| RU2496097C1 (en) * | 2012-05-04 | 2013-10-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Тверской государственный технический университет" | Measurement method for parameters of groove on shaft end face |
| CN203274660U (en) * | 2013-06-07 | 2013-11-06 | 新余钢铁集团有限公司 | Special-purpose measuring tool for measuring axis part keyway symmetry degree |
| CN205245975U (en) * | 2015-06-05 | 2016-05-18 | 贵州航天精工制造有限公司 | Measurement frock clamp of bolt straight line groove symmetry |
-
2015
- 2015-06-05 CN CN201510302091.9A patent/CN105043221A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1525430A1 (en) * | 1987-09-18 | 1989-11-30 | В. А. Озерский | Device for measuring symmetry of shaft key slot |
| RU2496097C1 (en) * | 2012-05-04 | 2013-10-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Тверской государственный технический университет" | Measurement method for parameters of groove on shaft end face |
| CN203116653U (en) * | 2013-03-21 | 2013-08-07 | 航天精工有限公司 | Composite gauge for measuring countersunk bolt P value |
| CN103245281A (en) * | 2013-05-03 | 2013-08-14 | 徐州工业职业技术学院 | Device and method for measuring symmetry degree of key groove of shaft |
| CN203274660U (en) * | 2013-06-07 | 2013-11-06 | 新余钢铁集团有限公司 | Special-purpose measuring tool for measuring axis part keyway symmetry degree |
| CN205245975U (en) * | 2015-06-05 | 2016-05-18 | 贵州航天精工制造有限公司 | Measurement frock clamp of bolt straight line groove symmetry |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547110A (en) * | 2015-12-14 | 2016-05-04 | 中国航空工业标准件制造有限责任公司 | Measuring tool for measuring size of spherical surface high-lock nut assembly components |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151111 |
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| RJ01 | Rejection of invention patent application after publication |