CN203875795U - Calibrating fixture for detecting axial tensile force of bolt - Google Patents
Calibrating fixture for detecting axial tensile force of bolt Download PDFInfo
- Publication number
- CN203875795U CN203875795U CN201420309911.8U CN201420309911U CN203875795U CN 203875795 U CN203875795 U CN 203875795U CN 201420309911 U CN201420309911 U CN 201420309911U CN 203875795 U CN203875795 U CN 203875795U
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- bolt
- detecting
- fixture
- axial
- box body
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Abstract
The utility model relates to a tool for detecting the physical parameters of mechanical parts, in particular to a calibrating fixture for detecting axial tensile force of a bolt. The calibrating fixture for detecting the axial tensile force of the bolt is characterized in that a center hole is formed in an opposite plate face in the long axis direction of a five-sided box body, an axial extension rod which stretches out of the box body is arranged on another plate face, the center hole and the axial lead of the extension rod placed outside the box body are placed on the same axis, and the extension rod which stretches out and the connecting plate face are fixedly connected together. According to the scheme, when the calibrating fixture is used for detecting bolt force and conducting linear calibration testing on strain of the bolt, clamping and force application can be achieved on the bolt safely and conveniently, acquired calibration data are accurate and reliable through detection, and real and effective technical support is provided for acquiring the linear relation of the bolt axial force and the strain. The calibrating fixture for detecting the axial tensile force of the bolt is reasonable and simple in structure, safe, reliable and practical.
Description
Technical field
The utility model relates to the utensil of measuring machine components physical parameter, particularly about a kind of demarcation fixture that detects bolt axial tension.
Background technology
For optimal design, often need to measure the actual state of the suffered load of parts, for example, in order to measure the suffered axial tension of connecting bolt.Yet, no matter be under which kind of service condition, the axial tension after bolt is tightened all cannot directly measure.For this reason, before test, first to seek the linear relationship of demarcation power and strain.For try to achieve the linear relationship specific practice of demarcation power and strain be by certain detect utensil to bolt when applying axial tension, gather and be arranged in advance the measured strain value of foil gauge on bolt, reinforcing each time correspondence records a strain value, so, after recording multi-group data, just can get one and using masterpiece as transverse axis, the strain linear relationship chart as the longitudinal axis.The corresponding linear relationship that has had power and strain,, can contrast above-mentioned linear relationship chart in actual use by measuring the suffered strain value of bolt, can easy to doly obtain the corresponding power of this strain value, is also the axial tension that this bolt bears.In order to obtain the linear relationship chart of the suffered axial tension of bolt and strain, need certain utensil to complete the test of above-mentioned power and strain value.In view of the contour structures of bolt itself is limit, for the direct grip bolt it is applied to pulling force of the puller system tested.For this reason, designing a kind of is necessary for realizing the fixture of said determination bolt axial tension, is also possible.
Utility model content
For obtaining the linear relationship of the suffered axial tension of bolt and strain, need certain utensil to complete
The demarcation test of above-mentioned power and strain value.In view of the contour structures of bolt itself is limit, for the direct grip bolt it is applied to pulling force of the puller system tested.The purpose of this utility model be design a kind of realize adding hold bolt and it applied to the fixture of axial tension.For this reason, adopt following technical scheme: a kind of demarcation fixture that detects bolt axial tension, it is characterized in that being provided with centre bore along five opposed plate faces of box body long axis direction, another plate face is provided with the axial extension bar stretching out outside box body; Centre bore is same axis with the extension bar axial line being placed in outside box body; Overhanging extension bar with connect the plate face of putting and fix as one; Five box bodies consist of five rectangular slab face welding.
Press the demarcation fixture that this programme is implemented, while testing in the power for detection of bolt and with its strain linear calibration, having completed the clamping of bolt and the application of force of safe and convenient, obtained nominal data accurately and reliably, provides true effectively technical support for demarcating the linear relationship chart of Axial stress in bolt and strain after testing.The utility model is rational in infrastructure simple and direct, a kind of safe and reliable and practical demarcation fixture of can yet be regarded as.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of embodiment of the utility model;
Fig. 2 is the schematic diagram during the present embodiment is used.
The specific embodiment
With regard to five rectangular steel plates of a kind of use, take by reference to the accompanying drawings that to put the demarcation fixture being welded be embodiment, illustrate.This clamp body is by upper and lower two rectangular steel plates 2 and left and right two rectangular steel plates 3 and one, back side rectangular steel plates 4, by design size, tailor by welding and form five box bodies, center at the lower face 2 of box body long axis direction (be illustrated upper and lower to) is shaped with through hole 20, be welded with the center of the opposed upper face 2 of lower face the extension bar 1 stretching out outside box body, the extension bar 1 that the axial line of lower face through hole 20 and upper face stretch out outside box body is same axis.
This fixture is to use in pairs in reality detects.As shown in Figure 2, use the upper and lower of puller system
Chuck is installed respectively the extension bar that clamps a clamp body, and guarantees central axis and the puller system chuck axis coaxle of upper and lower two clamp bodies.The bolt 5 of demarcating is in advance passed from the centre bore 20 of subscript clamp tool, and the distance of lower clamp in adjustment, makes bolt 5 simultaneously through the centre bore 20 of subscript clamp tool, and fastening nut, is connected together the opposed fixture of demarcating up and down by bolt.Adjust the distance between upper and lower two chucks of puller system, and make bolt 5 bear certain preload (such as 100N), its object is in order to eliminate the gap between bolt 5 and two clamp bodies.The axial tension of bearing for demarcating bolt, installs foil gauge on bolt head before test routinely.After bolt is applied preloading, now bolt itself has born strain and power, demarcates before starting that first strain and power are set to zero with software.While demarcating test, take certain force step-length as unit loads, such as 10KN, 20KN, 30KN, 40KN, 50KN etc., meanwhile with data collecting instrument, gather strain value corresponding to each power value.So far, can obtain one take power as abscissa, strain be linear relationship chart corresponding to ordinate.To linear graph like this, just can release the axial force value that bolt born in actual applications by strain value.The utility model is rational in infrastructure simple and direct, and a kind of safe and reliable and practical demarcation fixture of can yet be regarded as provides true effectively technical support for demarcating the linear relationship chart of Axial stress in bolt and strain.
Claims (4)
1. detect a demarcation fixture for bolt axial tension, it is characterized in that being provided with centre bore along five opposed plate faces of box body long axis direction, another plate face is provided with the axial extension bar stretching out outside box body.
2. by the demarcation fixture that detects bolt axial tension described in claim 1, it is characterized in that centre bore and the extension bar axial line being placed in outside box body are same axis.
3. by the demarcation fixture that detects bolt axial tension described in claim 1 or 2, it is characterized in that overhanging extension bar and connect the plate face of putting fixing as one.
4. by the demarcation fixture that detects bolt axial tension described in claim 1, it is characterized in that five box bodies consist of five rectangular slab face welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420309911.8U CN203875795U (en) | 2014-06-11 | 2014-06-11 | Calibrating fixture for detecting axial tensile force of bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420309911.8U CN203875795U (en) | 2014-06-11 | 2014-06-11 | Calibrating fixture for detecting axial tensile force of bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203875795U true CN203875795U (en) | 2014-10-15 |
Family
ID=51676338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420309911.8U Expired - Fee Related CN203875795U (en) | 2014-06-11 | 2014-06-11 | Calibrating fixture for detecting axial tensile force of bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203875795U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109514448A (en) * | 2018-11-05 | 2019-03-26 | 大连理工大学 | A kind of fixture applied in knife handle type piezoelectric force instrument static demarcating |
-
2014
- 2014-06-11 CN CN201420309911.8U patent/CN203875795U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109514448A (en) * | 2018-11-05 | 2019-03-26 | 大连理工大学 | A kind of fixture applied in knife handle type piezoelectric force instrument static demarcating |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141015 Termination date: 20180611 |