CN213337071U - Device for measuring bolt length change in bolt load test - Google Patents
Device for measuring bolt length change in bolt load test Download PDFInfo
- Publication number
- CN213337071U CN213337071U CN202021720660.4U CN202021720660U CN213337071U CN 213337071 U CN213337071 U CN 213337071U CN 202021720660 U CN202021720660 U CN 202021720660U CN 213337071 U CN213337071 U CN 213337071U
- Authority
- CN
- China
- Prior art keywords
- bolt
- measuring
- load test
- hole
- base
- 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.)
- Active
Links
Images
Landscapes
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The utility model discloses a device that is arranged in bolt to guarantee measuring bolt length variation among load test, including base, pole setting, grip block, amesdial, addendum cone vertical pole setting that is equipped with on the base, grip block level suit in the pole setting, the grip block be used for the centre gripping the amesdial, set up in the below of amesdial the addendum cone, the addendum cone is fixed on the base. Therefore, the problem that the change of the measurement state of the two times is caused due to the fact that the repeated point cannot be accurately found is solved, the measurement data is influenced, the working efficiency is improved, and the accuracy and the reliability of the test data are guaranteed.
Description
Technical Field
The utility model relates to a device of measuring bolt length variation, concretely relates to a device that is arranged in bolt assurance load test measuring bolt length variation.
Background
The bolt guarantee load test is a commonly used detection method in mechanical property indexes of finished bolts, and the method is characterized in that a bolt axial direction applies a pre-tightening force specified by a standard, the axial length of the bolt is measured before and after the pre-tightening force is applied, and whether a bolt sample meets the standard requirement or not is determined according to the deformation of the axial length. The total length of the fastener required in GB3098.1 is the same before and after the load test, and only a measurement error of +/-12.5 μm is allowed, so that the measurement of the bolt length requires high precision and small measurement size variation.
Usually, the measuring tools for bolt length include a micrometer, a vernier caliper and the like, but the measuring tools are not professional measuring tools for bolt load test assurance, the measuring tools cannot find the same repeated measuring points in the bolt length measuring process, and the measuring tools have poor stability and low precision and cannot meet the requirement of the bolt load test assurance on measuring length change.
The measuring device is a special measuring tool for ensuring the length of the bolt in the load test process, and the resolving power of the measuring tool with 0.0001mm meets the requirement that the test error of the test standard GB3098.1 is less than or equal to +/-12.5 mu m.
The inventor finds that patents CN201420170894.4 and CN201811279947.5 disclose a device for measuring the length change of a bolt, but the length of the bolt is measured in a horizontal mode, the bolt is not easy to rotate, and the positions measured in the two previous and subsequent times may be inconsistent due to gravity of a sample, and the accuracy of the value will be affected.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem that exists among the prior art, the utility model discloses a guarantee load test in bolt length change's special measuring tool, precision and stability accord with the test standard requirement and easy operation, reliability height.
In order to realize the purpose, the utility model discloses a technical scheme as follows:
the utility model provides a device that is arranged in bolt to guarantee measuring bolt length variation among load test, includes base, pole setting, grip block, amesdial, addendum cone the vertical pole setting that is equipped with on the base, grip block level suit in the pole setting, the grip block be used for the centre gripping the amesdial, set up in the below of amesdial the addendum cone, the addendum cone is fixed on the base.
As a further technical scheme, one end of the clamping block is provided with a first gap, the other end of the clamping block is provided with a second gap, a first through hole is formed in the position of the first gap, a second through hole is formed in the position of the second gap, the first through hole is matched with the vertical rod, and the second through hole is used for clamping the dial indicator.
As a further technical scheme, the second through hole is designed by a long round hole.
As a further technical scheme, the middle of the base is provided with an opening, the lower part of the tip cone is provided with threads, the tip cone penetrates through the opening in the middle of the base and is fixed in the middle of the base through an upper nut and a lower nut.
As a further technical scheme, the vertical rod is provided with a positioning groove, the side wall of the first through hole is provided with a positioning bulge, and the positioning bulge is matched with the positioning groove.
As a further technical scheme, the upright stanchion is provided with a positioning bulge, the side wall of the first through hole is provided with a positioning groove, and the positioning bulge is matched with the positioning groove.
As a further technical scheme, the clamping device further comprises a first bolt, and the first bolt is used for screwing the clamping block part corresponding to the first gap.
As a further technical scheme, the clamping device further comprises a second bolt, and the second bolt is used for screwing the clamping block part corresponding to the first gap.
Compared with the prior art, the utility model advantage and effect that have:
1. the utility model discloses the amesdial adopts the mode of grip block centre gripping fixed, and the amesdial is changed conveniently, and is applicable to the amesdial of multiple specification model.
2. The utility model discloses small, the quality can be according to the test place requirement everywhere remove, fine improvement experimenter's work efficiency.
3. The utility model is simple in operation, the rate of accuracy is high, has avoided in the bolt assurance load test because the influence of test operator's operation test equipment's ability, the change of twice measurement state around experimental to test data has improved work efficiency.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.
FIG. 1 is a schematic side view of the present invention;
fig. 2 is a schematic top view of the clamping block of the present invention;
in the figure: the spacing or dimensions between each other are exaggerated to show the location of the various parts, and the illustration is for illustrative purposes only. The positioning device comprises a vertical rod 1, a dial indicator 2, a clamping block 3, a tip cone 4, a base 5, a first gap 3-1, a first through hole 3-2, a second gap 3-3, a second through hole 3-4 and a positioning bulge 3-5.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, unless the invention expressly state otherwise, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "upper", "lower", "left" and "right" in the present application, if any, merely indicate correspondence with the upper, lower, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the present invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Just as the introduction of background art, the device of prior art's measuring bolt length change, bolt length adopt the horizontally mode to measure, and this mode bolt is difficult for rotatory, and twice measurement position can lead to the measuring point inconsistent because of sample gravity's reasons etc. around, will influence the accuracy of numerical value, in order to solve above technical problem, the utility model provides a device that is arranged in bolt assurance load test measuring bolt length change.
The utility model discloses an in the typical embodiment, as shown in FIG. 1, a device for measuring bolt length change in the bolt assurance load test includes: the device comprises a vertical rod 1, a dial indicator 2, a clamping block 3, a tip cone 4 and a base 5; the base 5 is vertically provided with a vertical rod 1, the clamping block 3 is horizontally sleeved on the vertical rod 1, the clamping block 1 is used for clamping the dial indicator 2, the tip cone 4 is arranged below the dial indicator 2, and the tip cone 4 is fixed on the base. This testing device adopts vertical structure to measure the length of bolt, and the bolt head that awaits measuring and bottom process the taper hole on same axis when the bolt carries out the load test, and the amesdial department of taking the sphere gauge head is arranged in to the bolt head, and the bottom is arranged in and is slightly rotatory behind the apical cone sphere gauge head department, utilizes the gravity of self to find the minimum, ensures that numerical value is stable, avoids the influence to test data of twice measurement state and position point's change production around experimental, the utility model provides a stability, the degree of accuracy that test operation personnel measured, for the bolt guarantees that load test provides a simple structure, portable, stable good, convenient to use efficient measuring tool.
Furthermore, the middle of the base 5 is provided with an opening, the lower part of the tip cone 4 is processed with threads, the tip cone 4 penetrates through the opening in the middle of the base 5 and is fixed in the middle of the base 5 through an upper nut and a lower nut.
Further, as shown in fig. 2, one end of the clamping block 3 is provided with a first gap 3-1, the other end is provided with a second gap 3-3, a first through hole 3-2 is arranged at the first gap, a second through hole 3-4 is arranged at the second gap 3-3, and the first through hole 3-1 is matched with the upright rod 1 and then is fixed and screwed by a first bolt; the second through hole 3-4 is used for clamping the dial indicator 2, and the dial indicator is fixed and screwed by a second bolt when passing through the second through hole.
The second through holes 3-4 are designed by long round holes, so that the position of the dial indicator can be conveniently adjusted, and the measuring point of the dial indicator and the measuring point of the tip cone are ensured to be on the same axis.
Furthermore, a guide groove is formed in the vertical rod 1, the clamping block is correspondingly designed for positioning the clamping groove, and positioning protrusions 3-5 are arranged, as shown in fig. 2, the clamping block 3 cannot move in the left-right direction when the vertical rod 1 moves up and down, so that the dial indicator and the tip cone are coaxial when the vertical rod 3 moves up and down.
Furthermore, a clamping block of the bolt length measuring instrument fixes a dial indicator by using a bolt, the dial indicator ensures the precision and the accuracy of a measured value and meets the requirement that the size change of a sample before and after the test is less than or equal to +/-12.5 mu m, which is required in the standard.
The specific operation procedures are as follows:
before loading test:
1) and adjusting the position of the dial indicator 2 to enable the measuring head to be on the same axis with the measuring head on the top surface of the tip cone 4.
2) The height of the clamping block 3 on the vertical rod 1 is adjusted according to the length of the bolt to be measured, so that the distance between the measuring head of the dial indicator 2 and the measuring head on the top surface of the tip cone 4 is smaller than the length of the bolt to be measured by about 1 cm.
3) The head and the bottom of the bolt to be measured are provided with taper holes on the same axis, the taper hole at one end of the bolt to be measured is jacked into the top surface measuring head of the tip cone 4, the measuring head of the dial gauge 2 is carefully jacked into the taper hole at the other end of the bolt to be measured, the bolt to be measured is slightly rotated, and the numerical value X1 is recorded when the numerical value of the dial gauge 2 is displayed to be minimum and stable.
4) And after the numerical value is recorded, carefully taking down the bolt to be tested to perform a guaranteed load test.
After the loading test:
1) put into according to step 3 before the loading test again with the bolt that takes off after guaranteeing the load test the utility model discloses in measure and record numerical value X2.
2) After the measurement is finished, calculating X2-X1, and comparing the obtained numerical value with the measurement error of +/-12.5 mu m required in GB/T3098.1 to judge whether the standard specification is met.
The length of the bolt that awaits measuring has been decided highly to this bolt length measurement appearance pole setting, can change the pole setting of suitable length according to the length of bolt, the utility model is suitable for a measurement of any length bolt length variation.
The bolt length measuring instrument has the advantages of simple structure, small volume, light weight, capability of moving everywhere, simple and convenient use, good guarantee of the accuracy and precision of test values, and reduction of the operation error of testers.
The utility model provides a bolt length variation measuring device among load test is guaranteed to bolt to solved because unable accurate duplicate site of looking for, twice measuring state's around leading to change, thereby influence measured data, improved work efficiency, guaranteed test data's accuracy and reliability.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a device that is arranged in bolt to guarantee measuring bolt length variation among load test, its characterized in that includes base, pole setting, grip block, amesdial, addendum cone the vertical pole setting that is equipped with on the base, grip block level suit in the pole setting, the grip block be used for the centre gripping the amesdial, set up in the below of amesdial the addendum cone, the addendum cone is fixed on the base.
2. The device for measuring the length change of the bolt in the bolt proof load test according to claim 1, wherein one end of the clamping block is provided with a first gap, the other end of the clamping block is provided with a second gap, a first through hole is arranged at the position of the first gap, a second through hole is arranged at the position of the second gap, the first through hole is matched with the vertical rod, and the second through hole is used for clamping a dial indicator.
3. The apparatus for measuring bolt length change in bolt proof load test as claimed in claim 2, wherein said second through hole is of slotted hole design.
4. The apparatus according to claim 2, wherein the vertical rod is provided with a positioning groove, the sidewall of the first through hole is provided with a positioning protrusion, and the positioning protrusion is engaged with the positioning groove.
5. The apparatus according to claim 2, wherein the vertical rod is provided with a positioning protrusion, the sidewall of the first through hole is provided with a positioning groove, and the positioning protrusion is engaged with the positioning groove.
6. The apparatus for measuring the change in the length of the bolt in the bolt proof load test as set forth in claim 2, further comprising a first bolt for tightening the clamping block portion corresponding to the first gap.
7. The apparatus for measuring the change in the length of the bolt in the bolt proof load test as set forth in claim 2, further comprising a second bolt for tightening the clamping block portion corresponding to the first gap.
8. The device for measuring the length change of the bolt in the bolt proof load test according to claim 1, wherein the base is provided with an opening in the middle, the lower part of the tip cone is provided with threads, the tip cone penetrates through the opening in the middle of the base and is fixed in the middle of the base through an upper nut and a lower nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021720660.4U CN213337071U (en) | 2020-08-17 | 2020-08-17 | Device for measuring bolt length change in bolt load test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021720660.4U CN213337071U (en) | 2020-08-17 | 2020-08-17 | Device for measuring bolt length change in bolt load test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213337071U true CN213337071U (en) | 2021-06-01 |
Family
ID=76097256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021720660.4U Active CN213337071U (en) | 2020-08-17 | 2020-08-17 | Device for measuring bolt length change in bolt load test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213337071U (en) |
-
2020
- 2020-08-17 CN CN202021720660.4U patent/CN213337071U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212300226U (en) | Simple inner hole taper detection device | |
| CN213337071U (en) | Device for measuring bolt length change in bolt load test | |
| CN105865306A (en) | High-precision conical hole test tool | |
| CN211262076U (en) | Inner diameter measuring device | |
| CN218673405U (en) | A detect structure for public four corners of clamping copper detects | |
| CN203069580U (en) | Mechanical calibration device for output load of lever type consolidometer | |
| CN111795634A (en) | Device and method for detecting size of opening of taper hole of wheel nut seat | |
| CN201787874U (en) | Measuring tool for detecting small diameter of external thread | |
| CN215677943U (en) | Rockwell hardness tester based on indentation depth | |
| CN214010163U (en) | Special measuring device for guaranteeing residual deformation of load test by bolts | |
| CN114993162A (en) | Device and method for measuring circumferential strain and axial stress of grouting material | |
| CN109000546A (en) | A kind of automobile axial workpiece testing apparatus for verticality | |
| CN211651486U (en) | Nut threaded hole verticality measuring device | |
| CN210954120U (en) | Diode electrical property detection device | |
| CN212721902U (en) | Force sensor calibration tool | |
| CN210571752U (en) | Bolt tensile measuring instrument | |
| CN210981061U (en) | Inner shape two-line positioning pendulum error meter | |
| CN209978807U (en) | Tool for clamping differential transformer type displacement sensor | |
| CN210981105U (en) | Rock sample basic parameter measuring device | |
| CN109668544B (en) | Vertical rod gradient measuring instrument and measuring method | |
| CN215492409U (en) | Measuring device for inner hole conical surface angle | |
| CN213842570U (en) | Calibrating device for spring testing machine | |
| CN211953998U (en) | Deep hole inner conical surface angle gauge | |
| CN219841890U (en) | Opening size measuring device | |
| CN213688130U (en) | Inner gear ring runout detector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |