CN209764562U - Test system for detecting pre-tightening force of blind rivet - Google Patents
Test system for detecting pre-tightening force of blind rivet Download PDFInfo
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- CN209764562U CN209764562U CN201821602088.4U CN201821602088U CN209764562U CN 209764562 U CN209764562 U CN 209764562U CN 201821602088 U CN201821602088 U CN 201821602088U CN 209764562 U CN209764562 U CN 209764562U
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Abstract
The utility model discloses a detect self-plugging rivet pretightning force test system, sleeve, signal amplifier, signal converter, display on sleeve, pressure sensors, pretightning force under the pretightning force, wherein: the upper end and the lower end of the pressure sensor are respectively provided with a pretightening force lower sleeve and a pretightening force upper sleeve, the lower part of the pretightening force upper sleeve is inserted into the pressure sensor, and a gap is reserved between the upper surface of the pretightening force lower sleeve and the lower surface of the pretightening force upper sleeve. The utility model discloses data is accurate, simple structure, convenient to use.
Description
Technical Field
The utility model belongs to the technical field of check out test set, concretely relates to detect self-plugging rivet pretightning force test system.
Background
The self-plugging rivet is mainly used for single-side riveting and comprises a rivet body, a core rod, a locking ring and other parts, wherein the rivet body forms a bulge under the action of the core rod during riveting, two interlayers are attached under the action of pretightening force, the design standard has requirements on the minimum value of the pretightening force, and the self-plugging rivet comprises two detection methods in the prior art: 1. a load cell method; by measuring the strain induced in the fastener using strain gauges, the pretension values for most fastener types can be determined with repeatability and direct comparability. The accuracy of the pretension measurement depends on proper strain gauge calibration, the rigidity of the structure, and the perpendicularity to the fastener contact surface. This method requires the necessary clearance for the strain gauge when making the hole, ultra-precision instrumentation when using smaller diameter fasteners, and significant time to instrument and test. These disadvantages make this approach unusable in some fastener types, such as: hole-filling type and makes this approach impractical. 2. Paddle pad or split pad methods; this method also indirectly measures fastener pretension. In either method, the tensile load is applied and stretched until the joint is released. The preload load, i.e., the required release load, on the joint enables either small shim movement or one paddle shim rotation. This test is convenient and can be performed quickly, but has disadvantages. The results obtained will be influenced by the coefficient of friction in the joint, the different loads used to move the pads or the angular offset of the rotating paddle pads and the loosening load. The results of this test are higher than the actual pretension, mainly due to bending caused by any deflection load, resulting in inaccurate data, complex structure and inconvenience in use.
Disclosure of Invention
An object of the utility model is to overcome above-mentioned shortcoming and a data that provide is accurate, simple structure, convenient to use's detection self-plugging rivet pretightning force test system.
the utility model discloses the purpose and solve its main technical problem and adopt following technical scheme to realize:
The utility model discloses a detect self-plugging rivet pretightning force test system, sleeve, signal amplifier, signal converter, display on sleeve, pressure sensors, pretightning force under the pretightning force, wherein: the upper end and the lower end of the pressure sensor are respectively provided with a pretightening force lower sleeve and a pretightening force upper sleeve, the lower part of the pretightening force upper sleeve is inserted into the pressure sensor, and a gap is reserved between the upper surface of the pretightening force lower sleeve and the lower surface of the pretightening force upper sleeve.
The pre-tightening force lower sleeve is cylindrical, a cylindrical large hole is formed in the bottom surface of the pre-tightening force lower sleeve, and a cylindrical small through hole communicated with the cylindrical large hole is formed in the upper surface of the pre-tightening force lower sleeve to form a convex-shaped hole.
The pre-tightening force upper sleeve is in a cylindrical shape with a large upper part and a small lower part, the large cylindrical shape on the upper part is provided with a concave round hole, and the lower part is provided with a cylindrical small through hole communicated with the cylindrical large hole.
The pressure sensor is connected with the signal amplifier through a lead, the signal amplifier is connected with the signal converter through a lead, and the signal converter is connected with the display through a lead.
Compared with the prior art, the utility model obvious advantage and beneficial effect have. According to the technical scheme, a cylindrical pretightening force upper sleeve tool with a boss is manufactured, the outer diameter of the boss is equivalent to that of an inner hole of a pressure sensor, a hole is dug in the boss, the bottom of the hole is a plane and is a joint surface of a loose-core rivet joint bulge, and the depth of the hole controls the thickness of a loose-core rivet joint interlayer; manufacturing a cylindrical pre-tightening force lower sleeve tool, hollowing out the inside of the tool, wherein the bottom surface is a plane, inserting the blind rivet into the cylindrical pre-tightening force lower sleeve tool, and enabling the supporting surface of the blind rivet to be in contact with the bottom surface; the pre-tightening force upper sleeve and the pre-tightening force lower sleeve are arranged at the upper end and the lower end of the pressure sensor, the blind rivet penetrates through the hole to complete riveting, the bottom surface of the pre-tightening force upper sleeve and the inner plane gap of the pre-tightening force lower sleeve contract, the pre-tightening force is transmitted to the pressure sensor through the cylindrical bottom surface of the pre-tightening force upper sleeve and the top surface of the pre-tightening force lower sleeve, the pressure sensor outputs a voltage and current signal under pressure, and the signal is input into software of a display through a signal amplifier and a. The data is accurate, the structure is simple, the use is convenient, and in a word, the data is accurate; the utility model discloses it is accurate to imitate data, simple structure, convenient to use.
description of the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the pre-tightening sleeve structure of the present invention;
FIG. 3 is a schematic view of the structure of the pre-tightening force upper sleeve of the present invention;
Fig. 4 the utility model discloses sleeve structure schematic diagram under the pretightning force.
Marked in the figure;
1. A pre-tightening force lower sleeve; 2. a pressure sensor; 3. pre-tightening force upper sleeves; 4. a signal amplifier; 5. a signal converter; 6. a display.
Detailed Description
The following detailed description will be given with reference to the drawings and the preferred embodiments of the present invention for the specific embodiments, features and effects of the blind rivet pretightening force testing system according to the present invention.
Referring to fig. 1 to 4, the utility model discloses a detect blind rivet pretightning force test system, sleeve 3, signal amplifier 4, signal converter 5, display 6 on sleeve 1, pressure-sensitive inductor 2, the pretightning force under the pretightning force, wherein: the upper end and the lower end of the pressure sensor 2 are respectively provided with a pre-tightening force lower sleeve 1 and a pre-tightening force upper sleeve 3, the lower part of the pre-tightening force upper sleeve 3 is inserted into the pressure sensor 2, and a gap is reserved between the upper surface of the pre-tightening force lower sleeve 1 and the lower surface of the pre-tightening force upper sleeve 3.
The pre-tightening force lower sleeve 1 is cylindrical, a cylindrical large hole is formed in the bottom surface of the pre-tightening force lower sleeve, and a cylindrical small through hole communicated with the cylindrical large hole is formed in the upper surface of the pre-tightening force lower sleeve to form a convex-shaped hole.
The pre-tightening force upper sleeve 3 is in a cylindrical shape with a large upper part and a small lower part, a concave round hole is formed in the large cylindrical shape on the upper surface, and a cylindrical small through hole communicated with the cylindrical big hole is formed in the lower surface.
The pressure sensor 2 is connected with a signal amplifier 4 by a lead, the signal amplifier 4 is connected with a signal converter 5 by a lead, and the signal converter 5 is connected with a display 6 by a lead.
When the self-plugging rivet is used, the self-plugging rivet penetrates through holes formed in the lower sleeve 1 of the pre-tightening force and the upper sleeve 3 of the pre-tightening force to complete riveting, the bottom surface of the upper sleeve 3 of the pre-tightening force and the plane gap in the lower sleeve 1 of the pre-tightening force contract to form the pre-tightening force, the large cylindrical bottom surface of the upper sleeve 3 of the pre-tightening force and the upper surface of the lower sleeve 1 of the pre-tightening force are in contact with the sensor 2, the pre-tightening force is transmitted to the pressure sensor 2, the pressure sensor 2 outputs a voltage and current signal under pressure, and the signal.
The aforesaid is only the preferred embodiment of the utility model discloses, it is not right the utility model discloses constitute the restriction, any if do not break away from the technical scheme content of the utility model, any simple modification, equivalent change and modification of making all still belong to the technical scheme's of the utility model within range.
Claims (4)
1. The utility model provides a detect self-plugging rivet pretightning force test system, includes sleeve (1) under the pretightning force, pressure-sensitive device (2), sleeve (3) on the pretightning force, signal amplifier (4), signal converter (5), display (6), its characterized in that: a pre-tightening force lower sleeve (1) and a pre-tightening force upper sleeve (3) are respectively arranged at the upper end and the lower end of the pressure sensor (2), the lower part of the pre-tightening force upper sleeve (3) is inserted into the pressure sensor (2), and a gap is reserved between the upper surface of the pre-tightening force lower sleeve (1) and the lower surface of the pre-tightening force upper sleeve (3).
2. the test system for detecting the pretightening force of the blind rivet according to claim 1, wherein: the pre-tightening force lower sleeve (1) is cylindrical, a cylindrical large hole is formed in the bottom surface of the pre-tightening force lower sleeve, and a cylindrical small through hole communicated with the cylindrical large hole is formed in the upper surface of the pre-tightening force lower sleeve to form a convex-shaped hole.
3. The test system for detecting the pretightening force of the blind rivet according to claim 1, wherein: the pre-tightening force upper sleeve (3) is in a cylindrical shape with a large upper part and a small lower part, a concave round hole is formed in the large cylindrical shape on the upper surface, and a cylindrical small through hole communicated with the cylindrical large hole is formed in the lower surface.
4. The test system for detecting the pretightening force of the blind rivet according to claim 1, wherein: the pressure sensor (2) is connected with the signal amplifier (4) through a lead, the signal amplifier (4) is connected with the signal converter (5) through a lead, and the signal converter (5) is connected with the display (6) through a lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821602088.4U CN209764562U (en) | 2018-09-29 | 2018-09-29 | Test system for detecting pre-tightening force of blind rivet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821602088.4U CN209764562U (en) | 2018-09-29 | 2018-09-29 | Test system for detecting pre-tightening force of blind rivet |
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| Publication Number | Publication Date |
|---|---|
| CN209764562U true CN209764562U (en) | 2019-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821602088.4U Active CN209764562U (en) | 2018-09-29 | 2018-09-29 | Test system for detecting pre-tightening force of blind rivet |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109211658A (en) * | 2018-09-29 | 2019-01-15 | 中国航空工业标准件制造有限责任公司 | A kind of detection self-plugging rivet pretightning force pilot system |
-
2018
- 2018-09-29 CN CN201821602088.4U patent/CN209764562U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109211658A (en) * | 2018-09-29 | 2019-01-15 | 中国航空工业标准件制造有限责任公司 | A kind of detection self-plugging rivet pretightning force pilot system |
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