CN210108575U - Auxiliary device for testing clamping force of fastener - Google Patents
Auxiliary device for testing clamping force of fastener Download PDFInfo
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- CN210108575U CN210108575U CN201920937078.4U CN201920937078U CN210108575U CN 210108575 U CN210108575 U CN 210108575U CN 201920937078 U CN201920937078 U CN 201920937078U CN 210108575 U CN210108575 U CN 210108575U
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- bearing plate
- elastic body
- counter bore
- cylinder
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Abstract
The utility model discloses an auxiliary device for test of fastener clamp force. The elastic body, the base body and the bearing plate are connected through a bolt to form a cylinder structure; the elastic body is a counter bore structure body, the strain gauge is adhered to the outer surface of the elastic body, the bottom surface of the counter bore is a counter bore surface, the center of the counter bore is provided with a through hole through which a fastening test piece passes and is fixedly riveted, the upper opening of the counter bore is provided with a wing edge structure connected with the base body, and the bottom of the elastic body and the opposite surface of the bearing plate have a 2-3mm gap; one end of the base body cylinder is connected with the wing edge of the elastic body, and the other end of the base body cylinder is connected and fixed with the bearing plate; the bearing plate is of a flat plate structure, and a through hole for riveting fixation is formed in the center of the bearing plate. The base body of the device of the utility model is used as a supporting structure, the elastic body is used as a force sensitive element, and the device has better deformation and resetting capability, thereby avoiding the problem of larger distance between stress surfaces; direct measurement of fastener clamping force can be achieved; the rivet is pressed and released by an oil press to be removed, so that the barrel body cannot be damaged, and the protection requirement on the force sensor in the destructive removal process is met.
Description
Technical Field
The utility model belongs to the technical field of power detection device design, especially, belong to force sensor's detection application technique field, in particular to utilize force sensor to carry out auxiliary device of fastener clamp force test.
Background
The force sensor is widely applied to detection of mechanical quantities such as tension, pressure, weight and the like. In the production test of fasteners, the clamping force test is an important test item and needs to be measured by a force sensor. Receive fastener clamp force production mode restriction, do not have suitable sensor at present and can carry out direct measurement, all need realize with the help of auxiliary fixtures, because two stress surface intervals of sensor are great, can't satisfy short fastener clamp force test. In addition, after the clamping force of the rivet pulling product is detected, an oil press is required to press and release the fastener, the pressing and releasing force is about 1.5 times of the clamping force, and the detection result of a conventional sensor is easy to damage.
Disclosure of Invention
The utility model discloses a not enough auxiliary device that is used for fastener clamp force to test according to prior art. The utility model aims at providing an adaptation fastener clamp force or other suitable conditions power detect, reduce the interval of sensor stress surface, solve the detection problem of the fastener clamp force of the less specification of tight thickness of clamp, satisfy the auxiliary device to the protection of sensor at destructive dismantlement in-process simultaneously.
The utility model discloses a following technical scheme realizes:
an auxiliary device for fastener clamping force test, its characterized in that: the elastic body, the base body and the bearing plate are connected through a bolt to form a cylinder structure; the elastic body is a counter bore structure body with a pit, a strain gauge of the force sensor is adhered to the outer surface of the elastic body cylinder, the bottom surface of the counter bore is a counter bore surface, a through hole for a fastening test piece to pass through and be riveted and fixed is arranged in the center of the counter bore, and the upper opening of the elastic body is provided with a supporting surface of a wing edge structure connected with the upper end of the base body; the bottom of the elastic body and the opposite surface of the bearing plate have a clearance of 2-3 mm.
The substrate is a cylinder made of a rigid material; one end of the base body cylinder is fixedly connected with the wing edge of the elastic body through symmetrically arranged bolts, and the inner diameter of the base body cylinder is larger than the outer diameter of the elastic body counter bore cylinder; the other end of the basal body cylinder is connected and fixed with the bearing plate through symmetrically arranged bolts.
The bearing plate is a flat plate, and a through hole for the fastening test piece to pass through and be riveted and fixed is formed in the center of the bearing plate.
The sinking platform surface and the central through hole of the bearing plate are concentric and have the same diameter, the fastening test piece passes through the sinking platform surface, the cap head of the fastening test piece is attached to the sinking platform surface, and the lantern ring or the nut of the fastening test piece is attached to the outer end surface of the bearing plate.
The base body of the auxiliary device of the utility model is used as a supporting structure, has higher strength and rigidity, and only bears the action of a pressing force; the elastic body is used as a force-sensitive element, has better deformation and resetting capability, is under the action of tensile force, and the sinking platform surface is used as a stress surface of the sensor; the strain gauge is used as a conversion element to convert the force signal into a voltage signal; the bearing plate is the other stress surface of the sensor and has higher strength and rigidity as the base body.
The utility model discloses the counter bore shape is made to the elastomer, and the foil gage is pasted at the barrel surface, and two stress surface intervals can not receive the influence of barrel length. The problem that the distance between stress surfaces is large due to the fact that the elastic body has enough size because conversion elements such as strain gauges need to be adhered to a common pressing force sensor can be solved.
The sinking platform surface and the circular hole in the middle of the bearing plate are concentric and have the same diameter, fasteners such as a rivet or a bolt and the like can penetrate through the sinking platform surface, the cap head is attached to the sinking platform surface, and the lantern ring or the nut is attached to the end surface of the bearing plate, so that the direct measurement of the clamping force of the fasteners is realized.
The utility model discloses auxiliary device utilizes the hydraulic press to press and takes off and demolish after the test of fastener clamp force is accomplished, when the pressure takes off and demolishs, the holding surface of elastomer is as the stress surface, realizes the transmission of force through the base member, and the elastomer counter bore barrel is no longer atress, can not cause the damage to the barrel, and the foil gage of protection force transducer does not receive the damage; the utility model discloses auxiliary device can realize the accurate detection of fastener clamp force, and the fastener installs additional and demolishs the convenience, satisfies the protection needs to force sensor at destructive dismantlement in-process.
Drawings
FIG. 1 is a schematic view of a fastener clamping force detection device according to the present invention;
FIG. 2 is a schematic structural diagram of the force sensor elastomer of the present invention;
FIG. 3 is a schematic view of the usage of the present invention;
fig. 4 is a schematic view of the pressure-disengaging process of the present invention.
Reference numbers and corresponding part names in the drawings: the test piece comprises a base body 1, an elastic body 2, a bearing plate 3, a bolt 4, a strain gauge 5, a cylinder 6, a supporting surface 7, a sinking platform surface 8 and a fastening test piece 9.
Detailed Description
The present invention will be further described with reference to the following embodiments, which are intended to illustrate the principles of the present invention without limiting the present invention in any way, and the present invention is not beyond the scope of the present invention.
With reference to the attached drawings.
The auxiliary device for the fastener clamping force test is characterized in that an elastic body 2, a base body 1 and a bearing plate 3 are connected through a bolt 4 to form a cylindrical structure; the elastic body 2 is a counter bore structure body with a pit, a strain gauge 5 of the force sensor is adhered to the outer surface of a cylinder body of the elastic body 2, the bottom surface of the counter bore is a counter bore surface 8, the center of the counter bore is provided with a through hole for a fastening test piece 9 to pass through and be riveted and fixed, and the upper opening of the elastic body 2 is provided with a supporting surface 7 of a wing edge structure connected with the upper end of the base body 1; the bottom of the elastic body 2 and the opposite surface of the bearing plate 3 have a clearance of 2-3 mm.
The substrate 1 is a cylinder made of a rigid material; one end of a cylinder of the base body 1 is fixedly connected with the wing edge of the elastic body 2 through symmetrically arranged bolts 4, and the inner diameter of the cylinder of the base body 1 is larger than the outer diameter of a counter bore cylinder of the elastic body 2; the other end of the cylinder of the base body 1 is fixedly connected with the bearing plate 3 through symmetrically arranged bolts 4.
The bearing plate 3 is a flat plate, and a through hole for the fastening test piece 9 to pass through and rivet is formed in the center of the plate.
The sinking platform surface 8 and the central through hole of the bearing plate 3 are concentric and have the same diameter, the fastening test piece 9 passes through the through hole, the cap head of the fastening test piece 9 is attached to the sinking platform surface 8, and the lantern ring or the nut of the fastening test piece 9 is attached to the outer end surface of the bearing plate 3.
As shown in fig. 1, the auxiliary device for testing the clamping force of the fastener of the present invention comprises a base body 1, an elastic body 2, a bearing plate 3, a bolt 4 and a strain gauge 5; the elastic body 2 is composed of a cylinder body 6, a supporting surface 7 and a sinking platform surface 8, the elastic body 2, the base body 1 and the bearing plate 3 are all connected through bolts 4, and the bottom surfaces of the sinking platform surface 8 and the bearing plate 3 are two stress surfaces of the sensor. During the detection, the cylinder 6 is under tensile force, and the strain gauge 5 adhered thereon generates micro-strain.
As shown in fig. 2, the strain gauge 5 is adhered to the cylinder 6, the strain gauge 5 adopts a full-bridge connection method to convert the tensile force applied to the cylinder 6 into a voltage signal, and then the voltage signal is collected by a data collection instrument, so that the test of the clamping force is completed.
As shown in figure 3, when a bolt or a rivet and other fasteners are subjected to a clamping force test, the middle hole of the counter sink surface 8 penetrates through the middle hole, the cap head is attached to the counter sink surface 8, the nut or the lantern ring is attached to the bearing plate 3, and the two stress surfaces are stressed to realize the test of the clamping force of the fasteners in the locking or riveting process.
As shown in fig. 4, during the rivet pulling and pressing process, the cylinder 6 of the elastic body 2 is not stressed, and the pressing and pressing force is completely born by the base body 1.
The utility model discloses auxiliary test device is applicable to the clamp force test of fastener, has less stress surface interval, and it can solve short specification fastener clamp force and can't test the problem; the elastic body 2 is stressed only in the testing process, and the base body 1 is stressed in the disassembling process, so that the damage to the sensor in the destructive disassembling process after the clamping force test of the rivet pulling product is finished is avoided.
Claims (4)
1. An auxiliary device for fastener clamping force testing, characterized in that: the elastic body, the base body and the bearing plate are connected through a bolt to form a cylinder structure; the elastic body is a counter bore structure body with a pit, a strain gauge of the force sensor is adhered to the outer surface of the elastic body cylinder, the bottom surface of the counter bore is a counter bore surface, a through hole for a fastening test piece to pass through and be riveted and fixed is arranged in the center of the counter bore, and the upper opening of the elastic body is provided with a supporting surface of a wing edge structure connected with the upper end of the base body; the bottom of the elastic body and the opposite surface of the bearing plate have a clearance of 2-3 mm.
2. The auxiliary device for fastener clamping force testing of claim 1, wherein: the substrate is a cylinder made of a rigid material; one end of the base body cylinder is fixedly connected with the wing edge of the elastic body through symmetrically arranged bolts, and the inner diameter of the base body cylinder is larger than the outer diameter of the elastic body counter bore cylinder; the other end of the basal body cylinder is connected and fixed with the bearing plate through symmetrically arranged bolts.
3. The auxiliary device for fastener clamping force testing of claim 2, wherein: the bearing plate is a flat plate, and a through hole for the fastening test piece to pass through and be riveted and fixed is formed in the center of the bearing plate.
4. An auxiliary device for fastener clamping force testing as claimed in claim 3, wherein: the sinking platform surface and the central through hole of the bearing plate are concentric and have the same diameter, the fastening test piece passes through the sinking platform surface, the cap head of the fastening test piece is attached to the sinking platform surface, and the lantern ring or the nut of the fastening test piece is attached to the outer end surface of the bearing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920937078.4U CN210108575U (en) | 2019-06-20 | 2019-06-20 | Auxiliary device for testing clamping force of fastener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920937078.4U CN210108575U (en) | 2019-06-20 | 2019-06-20 | Auxiliary device for testing clamping force of fastener |
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| Publication Number | Publication Date |
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| CN210108575U true CN210108575U (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920937078.4U Active CN210108575U (en) | 2019-06-20 | 2019-06-20 | Auxiliary device for testing clamping force of fastener |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285905A (en) * | 2019-06-20 | 2019-09-27 | 眉山中车紧固件科技有限公司 | A kind of auxiliary device for the test of fastener clamping force |
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2019
- 2019-06-20 CN CN201920937078.4U patent/CN210108575U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285905A (en) * | 2019-06-20 | 2019-09-27 | 眉山中车紧固件科技有限公司 | A kind of auxiliary device for the test of fastener clamping force |
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