CN109253680B - Bolt length change amount measuring device and using method thereof - Google Patents
Bolt length change amount measuring device and using method thereof Download PDFInfo
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- CN109253680B CN109253680B CN201811279947.5A CN201811279947A CN109253680B CN 109253680 B CN109253680 B CN 109253680B CN 201811279947 A CN201811279947 A CN 201811279947A CN 109253680 B CN109253680 B CN 109253680B
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- bolt
- length
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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
- 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
- G01B21/02—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 length, width, or thickness
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a bolt length change measuring device and a using method thereof, wherein the bolt length change measuring device comprises a base, a length meter, a meter clamping block, a supporting block and a tip; the outer frame of the base is nearly trapezoidal and is provided with an upper bottom plate, a lower bottom plate and an inclined plate; the upper bottom plate is provided with a horizontal slideway, and the gauge clamping block and the supporting block are slidably distributed on the horizontal slideway; one end of the upper bottom plate is also provided with a tip fixing block, the tip fixing block is also provided with a vertical slideway, and the tip can be fixed on the vertical slideway in a sliding manner; the tail end of the tip and the tail end of the gauge needle of the length gauge are tips; the supporting blocks are distributed between the meter clamping blocks and the apexes; the length gauge is distributed on the gauge clamping blocks; the lower bottom plate and the inclined plate can be used as the supporting bottom surface of the base placed on the ground. The detection method provided by the invention is simple and convenient to operate, high in measurement accuracy, strong in reliability and high in efficiency.
Description
Technical Field
The invention relates to the technical field of fastener detection, in particular to a bolt length change measuring device and a using method thereof.
Background
Bolt type fastener may produce tiny length change after using, judges the life of bolt through detecting the length change volume before the use of bolt, back. In order to measure the length change amount, the measurement needs to be repeated after one use before use. Because the length of the bolt changes in the micron level after use, in order to ensure the accuracy of measurement, it is necessary to reduce the interference of related factors such as measurement pressure and the like during two repeated measurements.
The current detection method that adopts has slide caliper, when measuring bolt length, takes the both ends face of bolt to measure, and the edge of its terminal surface can appear irregular distortion because of receiving the influence of effort such as tensile and extrusion after the bolt uses, therefore this kind of measurement method can be accumulated the terminal surface shape error of bolt in the length measurement result, influences the measuring accuracy. In order to avoid the influence of the shape error of the end face of the bolt on the length measurement, the other method is to process positioning taper holes at two ends of the bolt and then inlay steel balls at two ends of the bolt, so that the deformation of the bolt can cause the inlaid steel balls to fall off in the using process, and the characteristics of the bolt are changed, therefore, the measuring method has low success rate, low reliability and complex operation.
The above background disclosure is only for the purpose of assisting understanding of the concept and technical solution of the present invention and does not necessarily belong to the prior art of the present patent application, and should not be used for evaluating the novelty and inventive step of the present application in the case that there is no clear evidence that the above content is disclosed at the filing date of the present patent application.
Disclosure of Invention
Aiming at the technical problems, the invention provides the bolt length change measuring device which is simple and convenient to operate, high in measuring accuracy, high in reliability and high in efficiency and the using method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
a bolt length variation measuring device comprises a base, a length gauge, a gauge clamping block, a supporting block and a tip; the outer frame of the base is nearly trapezoidal and is provided with an upper bottom plate, a lower bottom plate and an inclined plate; the upper bottom plate is provided with a horizontal slideway, and the gauge clamping block and the supporting block are slidably distributed on the horizontal slideway; one end of the upper bottom plate is also provided with a tip fixing block, the tip fixing block is also provided with a vertical slideway, and the tip can be fixed on the vertical slideway in a sliding manner; the tail end of the tip and the tail end of the gauge needle of the length gauge are tips; the supporting blocks are distributed between the meter clamping blocks and the apexes; the length gauge is distributed on the gauge clamping blocks; the lower bottom plate and the inclined plate can be used as the supporting bottom surface of the base placed on the ground.
Furthermore, the supporting blocks are V-shaped supporting blocks, and the number of the V-shaped supporting blocks is two.
Furthermore, the lower part of supporting shoe and the lower part of strapping table grip block all respectively is equipped with bolt assembly, bolt assembly includes a screw rod and two nuts, and two the nut is right the upper plate carries out the centre gripping, realizes the supporting shoe with the upper and lower position control of strapping table grip block and slidable fixed on the horizontal slide.
Further, the length gauge is a dial indicator or a displacement sensor.
Furthermore, the included angle between the inclined plate and the lower bottom plate is 120-150 degrees.
Furthermore, the inclined plate and the lower bottom plate form an included angle of 125-135 degrees.
A method for measuring the length variation of a bolt using the bolt length variation measuring apparatus as described above, comprising the steps of:
(1) placing the lower bottom plate on the ground, adjusting the left and right positions of the gauge clamping block on the horizontal slideway according to the length of the bolt to be measured, and placing the bolt to be measured on the V-shaped supporting block;
(2) adjusting the meter clamping block, the center and the V-shaped supporting block up and down according to the diameter of the bolt to be measured, so that the tips of the center and the length meter and the central line of the bolt to be measured on the V-shaped supporting block are on the same horizontal line;
(3) placing the inclined plate (the inclined plate on one side of the top 3) on the ground, detecting the length of the bolt to be detected by taking the dead weight pressure of the bolt to be detected as detection pressure, reading a reading of a length measuring table, taking down the bolt to be detected, and tightening the bolt to be detected;
(4) and repeating the measurement operation on the bolt to be measured after the tightening operation, reading, determining a detection value, and completing the measurement of the length change of the bolt to be measured.
Compared with the prior art, the invention has the beneficial effects that: the base is arranged, the inclined plate can be obliquely placed on the base, the base is supported in a mode of being provided with the V-shaped supporting block, the detection pressure is guaranteed to be constant by adopting the self weight of the bolt to be detected, and the detection error caused by the peripheral rotary deformation of the bolt to be detected after the bolt to be detected is used is avoided by arranging the tip and adopting the length gauge and a mode that the tip contacts the center (but not the periphery) of the bolt to be detected; more important, adopt this device need not repacking the bolt that awaits measuring, kept the original appearance of the bolt that awaits measuring, do not change the original characteristic of the bolt that awaits measuring, measure the reliability higher, more laminate actual value. The method for detecting by adopting the device can realize appropriate detection pressure and constant pressure when repeated detection is carried out, can realize rapidness, convenience and accuracy of detection, and obviously improves the detection efficiency and the detection reliability.
Drawings
FIG. 1 is a schematic top perspective view of the present invention;
FIG. 2 is a side view of the present invention;
fig. 3 is a side view of the present invention when bolt inspection is performed.
Detailed Description
As shown in fig. 1 to 3, a device for measuring the length change of a bolt comprises a base 1, a length gauge 7, a gauge clamping block 6, two V-shaped supporting blocks 4 and a tip 3; the outer frame of the base is nearly trapezoidal and is provided with an upper bottom plate, a lower bottom plate and an inclined plate; a horizontal slideway 10 is arranged on the upper bottom plate, and the meter clamping block 6 and the V-shaped supporting block 4 are slidably distributed on the horizontal slideway 10; in this embodiment, the lower portion of the V-shaped support block 4 and the lower portion of the meter clamping block 6 are respectively provided with a bolt assembly, the bolt assembly comprises a screw and two nuts 5, and the two nuts 5 clamp the upper base plate, so that the V-shaped support block 4 and the meter clamping block 6 are adjusted in the up-down position and are fixed on the horizontal slide way 10 in a sliding manner.
One end of the upper bottom plate is also provided with a tip fixing block 9, the tip fixing block 9 is also provided with a vertical slideway 9-1, and the tip 3 is fixed on the vertical slideway 9-1 in a sliding manner through a screw 2; the tail end of the centre 3 and the tail end of the pointer of the length gauge 7 are pointed ends which are mainly designed to only contact the center of the bolt 8 to be measured when the bolt is in contact with the center of the bolt, so that the inaccurate measurement caused by the distortion and deformation of the periphery of the bolt after use is avoided; the V-shaped supporting blocks 4 are distributed between the meter clamping block 6 and the tip 3; the length gauge 7 is a dial indicator or a displacement sensor and is clamped by a nut 5 and distributed on the gauge clamping block 6; the lower bottom plate and the inclined plate can be used as the supporting bottom surface of the base 1 placed on the ground, the detection principle of the detection device is also based, constant detection pressure during front and back detection is ensured by relying on the dead weight of a bolt to be detected, no external pressure is needed, and the problem that the front and back detection pressure is constant because the traditional external pressure cannot be ensured is solved. In order to realize better measurement, the included angles between the inclined plate and the lower bottom plate can be set to be 120 degrees, 125 degrees, 130 degrees, 135 degrees, 140 degrees and 150 degrees, and when the included angles are adopted, the dead weight pressure generated in detection is suitable.
When the device is used, the lower bottom plate is placed on the ground, the meter clamping block 6, the tip 3 and the V-shaped supporting block 4 are adjusted up and down according to the diameter and length of the bolt to be measured, the tips of the tip 3 and the length meter 7 are on the same horizontal line with the central line of the bolt to be measured on the V-shaped supporting block, the meter clamping block 6 is adjusted to slide horizontally to the left and right, the inclined plate (the inclined plate on one side of the tip 3) is placed on the ground, the upper bottom plate is inclined at the moment, the self-weight pressure of the bolt to be measured is used as the detection pressure, no external force is applied, the bolt to be measured is detected, the reading of the length meter is read, the bolt to be measured is taken down, the bolt to be measured is tightened, the bolt to be measured is measured, the reading is carried out, and. By adopting the device, the bolt to be measured falls against the measuring device by means of self gravity to be measured, and the bolt to be measured is fixed without additional external force. The contact pressure during measurement is only related to the dead weight of the bolt to be measured, and when the bolt to be measured is not broken or damaged after being used, the dead weight of the bolt is not changed, the inclination angle of the inclined plate is not changed, and the measured contact pressure is also kept unchanged. Meanwhile, the device does not need to refit the bolt to be measured, keeps the original appearance of the bolt to be measured, does not change the original characteristic of the bolt to be measured, has higher measurement reliability and is closer to the actual value of the bolt to be measured.
A method for measuring the length variation of a bolt using the bolt length variation measuring apparatus as described above, comprising the steps of:
(1) placing the lower bottom plate on the ground, adjusting the left and right positions of the gauge clamping block on the horizontal slideway according to the length of the bolt to be measured, and placing the bolt to be measured on the V-shaped supporting block;
(2) adjusting the meter clamping block, the center and the V-shaped supporting block up and down according to the diameter of the bolt to be measured, so that the tips of the center and the length meter and the central line of the bolt to be measured on the V-shaped supporting block are on the same horizontal line;
(3) placing the inclined plate (the inclined plate on one side of the top 3) on the ground, detecting the length of the bolt to be detected by taking the dead weight pressure of the bolt to be detected as detection pressure, reading a reading of a length measuring table, taking down the bolt to be detected, and tightening the bolt to be detected;
(4) and repeating the measurement operation on the bolt to be measured after the tightening operation, reading, determining a detection value, and completing the measurement of the length change of the bolt to be measured.
Claims (4)
1. The utility model provides a bolt length variation measuring device which characterized in that: comprises a base, a length meter, a meter clamping block, a supporting block and a tip; the outer frame of the base is nearly trapezoidal and is provided with an upper bottom plate, a lower bottom plate and an inclined plate; the upper bottom plate is provided with a horizontal slideway, and the gauge clamping block and the supporting block are slidably distributed on the horizontal slideway; one end of the upper bottom plate is also provided with a tip fixing block, the tip fixing block is also provided with a vertical slideway, and the tip can be fixed on the vertical slideway in a sliding manner; the tail end of the tip and the tail end of the gauge needle of the length gauge are tips; the supporting blocks are distributed between the meter clamping blocks and the apexes; the length gauge is distributed on the gauge clamping blocks; the lower bottom plate and the inclined plate can be used as supporting bottom surfaces of the base placed on the ground; the supporting blocks are V-shaped supporting blocks, and two V-shaped supporting blocks are arranged; bolt components are respectively arranged on the lower portion of the supporting block and the lower portion of the meter clamping block and comprise a screw and two nuts, and the two nuts clamp the upper bottom plate to achieve vertical position adjustment of the supporting block and the meter clamping block and slidable fixation on the horizontal slide way; the inclined plate and the included angle of the lower bottom plate are 120-150 degrees.
2. The device for measuring the amount of change in the length of a bolt according to claim 1, wherein: the length gauge is a dial indicator or a dial indicator.
3. The device for measuring the amount of change in the length of a bolt according to claim 1, wherein: the inclined plate and the included angle of the lower bottom plate is 125-135 degrees.
4. A method of measuring a length variation of a bolt using the bolt length variation measuring apparatus according to any one of claims 1 to 3, comprising the steps of:
(1) placing the lower bottom plate on the ground, adjusting the left and right positions of the gauge clamping block on the horizontal slideway according to the length of the bolt to be measured, and placing the bolt to be measured on the V-shaped supporting block;
(2) adjusting the meter clamping block, the center and the V-shaped supporting block up and down according to the diameter of the bolt to be measured, so that the tips of the center and the length meter and the central line of the bolt to be measured on the V-shaped supporting block are on the same horizontal line;
(3) placing the inclined plate on one side of the center on the ground, detecting the length of the bolt to be detected by using the dead weight pressure of the bolt to be detected as detection pressure, reading the reading of a length measuring table, taking down the bolt to be detected, and tightening the bolt to be detected;
(4) and repeating the measurement operation on the bolt to be measured after the tightening operation, reading, determining a detection value, and completing the measurement of the length change of the bolt to be measured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811279947.5A CN109253680B (en) | 2018-10-30 | 2018-10-30 | Bolt length change amount measuring device and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811279947.5A CN109253680B (en) | 2018-10-30 | 2018-10-30 | Bolt length change amount measuring device and using method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109253680A CN109253680A (en) | 2019-01-22 |
| CN109253680B true CN109253680B (en) | 2020-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811279947.5A Active CN109253680B (en) | 2018-10-30 | 2018-10-30 | Bolt length change amount measuring device and using method thereof |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60152901A (en) * | 1984-01-20 | 1985-08-12 | Hirano Sekkei Kk | Inspecting machine for hexagon socket bolt |
| JP2007108153A (en) * | 2005-10-11 | 2007-04-26 | Koichi Takahashi | Device for holding number of screw threads (number of pitches) of bolt |
| CN202002594U (en) * | 2011-02-23 | 2011-10-05 | 葛洲坝集团试验检测有限公司 | Concrete specimen length change tester |
| CN203405142U (en) * | 2013-08-22 | 2014-01-22 | 中国神华能源股份有限公司 | Measuring scale used for measuring coupling bolt of turbo generator set |
| CN103760327A (en) * | 2014-01-21 | 2014-04-30 | 深圳大学 | Concrete shrinkage measuring instrument |
| CN204085476U (en) * | 2014-08-22 | 2015-01-07 | 宁波铝宏汽车零部件有限公司 | Transmission gears repacking tool |
| CN206683539U (en) * | 2017-03-03 | 2017-11-28 | 武汉市恒通诚汽车零部件有限公司 | A kind of length-measuring appliance |
| CN207907791U (en) * | 2018-03-29 | 2018-09-25 | 山东理工精密机械有限公司 | Long axis measuring device |
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2018
- 2018-10-30 CN CN201811279947.5A patent/CN109253680B/en active Active
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