CN106949828B - Resistance strain gauge pasting device and working method thereof - Google Patents
Resistance strain gauge pasting device and working method thereof Download PDFInfo
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- CN106949828B CN106949828B CN201710264183.1A CN201710264183A CN106949828B CN 106949828 B CN106949828 B CN 106949828B CN 201710264183 A CN201710264183 A CN 201710264183A CN 106949828 B CN106949828 B CN 106949828B
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- strain gauge
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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
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/18—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in resistance
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a resistance strain gauge pasting device and a working method thereof, wherein the device comprises the following components: the device comprises a shell, a replaceable positioning base, a strain gauge adsorption device and an operating device; the replaceable positioning base is inserted into the lower end opening of the shell and connected with the shell through a countersunk head bolt; the operation device includes: connecting rod and slide button, the two fixed connection, slide button locate the outside of shell, and be equipped with spacing pin between slide button and the shell, foil gage adsorption equipment includes: the cylinder, the piston and the strain gage base are all arranged in the shell. The resistance strain gauge pasting device is convenient to operate and suitable for resistance strain gauges in various shapes.
Description
Technical Field
The invention belongs to the technical field of instruments and meters in material science and mechanical manufacturing technology, and particularly relates to an auxiliary resistance strain gauge pasting device and a working method thereof.
Background
A resistive strain gauge is a device for measuring strain that is composed of a sensitive grid or the like. The resistance strain gauge has various shapes and is widely used in various mechanical tests. The working principle of the method is that when a conductor or a semiconductor is mechanically deformed under the action of external force, the resistance value of the conductor or the semiconductor is correspondingly changed, and the phenomenon is called as a strain effect. When the resistance strain gauge is used, the resistance strain gauge needs to be adhered to a measuring point of a component, after the component is stressed, the resistance of the resistance strain gauge changes along with the strain of the measuring point, and then the resistance value of the resistance strain gauge is measured by a special instrument and converted into the strain of the measuring point. Whether the pasting position and the pasting angle of the resistance strain gauge are correct or not can greatly influence the strain of the measuring point obtained by the test.
At present, few patents are available for adhering resistance strain gauges. In actual operation, the strain gauge is generally pasted by hands or tweezers. Because the size of the resistance strain gauge is about 5 mm generally, the position error of the strain gauge is overlarge inevitably due to manual pasting, and finally the test result is inaccurate. Chinese patent application No. CN201510491457.1 discloses a strain gauge sticking device, which realizes the sticking work of a strain gauge through a positioning plate, a pressing mechanism, a sucker assembly and the like. However, this device is relatively complex in structure, requires an external energy source, and cannot be conveniently attached to strain gauges of different shapes.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a resistance strain gauge attaching apparatus and a working method thereof, which is convenient to operate and suitable for resistance strain gauges of various shapes.
In order to achieve the above object, the present invention provides a resistance strain gauge attaching apparatus, comprising: the device comprises a shell, a replaceable positioning base, a strain gauge adsorption device and an operating device;
the replaceable positioning base is inserted into the lower end opening of the shell and is connected with the shell through a countersunk bolt; the replaceable positioning base is provided with a first through hole;
the operation device comprises: the connecting rod and the sliding button are fixedly connected, the sliding button is arranged outside the shell, a limiting pin is arranged between the sliding button and the shell and penetrates through a circular hole in the side wall of the shell, two ends of the limiting pin are respectively provided with a bulge, the two bulges are respectively arranged inside and outside the shell, and a first spring is sleeved outside one end, in contact with the sliding button, of the limiting pin;
the strain gauge adsorption device comprises: the cylinder, the piston and the strain gauge base are all arranged in the shell, the lower part of the cylinder is a cylinder with a small diameter, a second through hole is formed in the cylinder, a second spring is sleeved outside the cylinder, and the cylinder penetrates through the first through hole in the replaceable positioning base and then is connected with the strain gauge base through friction force; the piston is positioned on the right side in the cylinder, is connected with the connecting rod and moves up and down in the cylinder along with the connecting rod, a third spring is sleeved outside the connecting rod, one end of the third spring is matched with the piston, and the other end of the third spring is matched with a boss arranged on the right side of the cylinder.
Preferably, the outer wall of the replaceable positioning base is marked with a positioning score line.
Preferably, the side wall of the replaceable positioning base is provided with an opening.
Preferably, the size and shape of the upper part and the lower part of the first through hole on the replaceable positioning base are different.
Preferably, the lower part of the first through hole on the replaceable positioning base is the same as the strain gauge in size and shape.
The invention discloses a working method of a resistance strain foil pasting device, which comprises the following steps:
when the strain gauge is pasted, the strain gauge is placed in the first through hole of the replaceable positioning base through the opening of the side wall of the replaceable positioning base; the sliding button is pushed downwards, the downward movement distance of the sliding button does not exceed the position of the limiting pin, the air cylinder is limited by the limiting pin and cannot move up and down, and the sliding button drives the piston to move downwards through the connecting rod; the air pressure in the cylinder is reduced, and the strain gauge is fixed on the strain gauge base under the action of the atmospheric pressure; then coating glue on the surface of the test piece, enabling the replaceable positioning base to be tightly attached to the surface of the test piece, and aligning the positioning scribed line on the replaceable base with the marked line on the surface of the test piece; then the sliding button is pushed downwards to the lowest position, at the moment, the limiting pin bounces under the action of the first spring, and the whole air cylinder is driven by the sliding button to move downwards; the strain gauge is pushed out from the replaceable positioning base by the strain gauge base and is in close contact with the surface of the test piece; waiting for 5-15 seconds, and releasing the sliding button after the glue is dried.
The invention has the beneficial effects that:
1. simple structure and simple operation.
2. No need of external energy source, no limitation of site and personnel.
3. The bonding precision of the strain gauge can be improved.
Drawings
FIG. 1 is a structural sectional view of the device of the present invention.
Fig. 2 is a perspective view of the structure of the device of the present invention.
FIG. 3 is a bottom view of the device applied to a first strain gage.
FIG. 4 is a bottom view of the device applied to a second strain gage.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.
Referring to fig. 1 and 2, a resistance strain gauge attaching apparatus according to the present invention includes: the device comprises a shell, a replaceable positioning base, a strain gauge adsorption device and an operating device;
the replaceable positioning base 10 is inserted into the lower end opening of the shell 1 and connected with the shell 1 through a countersunk head bolt 12; a first through hole is arranged on the replaceable positioning base 10;
the operation device comprises: the connecting rod 5 and the sliding button 8 are fixedly connected, the sliding button 8 is arranged outside the shell 1, a limiting pin 6 is arranged between the sliding button 8 and the shell 1, the limiting pin 6 penetrates through a circular hole in the side wall of the shell 1, two ends of the limiting pin 6 are respectively provided with a bulge, the two bulges are respectively arranged inside and outside the shell, and a first spring 7 is sleeved outside one end, in contact with the sliding button 8, of the limiting pin 6;
the strain gauge adsorption device comprises: the cylinder 2, the piston 3 and the strain gauge base 11 are all arranged in the shell 1, the lower part of the cylinder 2 is a cylinder 15 with a small diameter, a second through hole is formed in the cylinder 15, a second spring 9 is sleeved outside the cylinder, and the cylinder penetrates through the first through hole in the replaceable positioning base 10 and then is connected with the strain gauge base 11 through friction force; the piston 3 is positioned on the right side in the cylinder 2, is connected with the connecting rod 5, moves up and down in the cylinder 2 along with the connecting rod 5, and a third spring 4 is sleeved outside the connecting rod 5, one end of the third spring is matched with the piston 3, and the other end of the third spring is matched with a boss 16 arranged on the right side of the cylinder 2.
The invention discloses a working method of a resistance strain foil pasting device, which comprises the following steps:
when the strain gauge is pasted, the strain gauge is placed in the first through hole of the replaceable positioning base through the opening of the side wall of the replaceable positioning base; the sliding button is pushed downwards, the downward movement distance of the sliding button does not exceed the position of the limiting pin, the air cylinder is limited by the limiting pin through the boss at the moment and cannot move up and down, and the sliding button drives the piston to move downwards through the connecting rod; the air pressure in the cylinder is reduced, and the strain gauge is fixed on the strain gauge base under the action of the atmospheric pressure; then coating glue on the surface of the test piece, enabling the replaceable positioning base to be tightly attached to the surface of the test piece, and aligning the positioning scribed line on the replaceable base with the marked line on the surface of the test piece; then the sliding button is pushed downwards to the lowest position, the limiting pin is bounced under the action of the first spring, and the whole air cylinder is driven by the sliding button to move downwards; the strain gauge is pushed out from the replaceable positioning base by the strain gauge base and is in close contact with the surface of the test piece; waiting for 5-15 seconds, and releasing the sliding button after the glue is dried.
When the strain gauges with different shapes are adhered, the countersunk head bolts are loosened, then the replaceable positioning base and the strain gauge base with the holes corresponding to the shapes are replaced, and then the countersunk head bolts are screwed down, so that the adhesion work of the strain gauges with other shapes can be carried out, and fig. 3 and fig. 4 list two kinds of replaceable bases.
While the invention has been described in terms of its preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (4)
1. A resistance strain gage pasting device is characterized by comprising: the device comprises a shell, a replaceable positioning base, a strain gauge adsorption device and an operating device;
the replaceable positioning base is inserted into the lower end opening of the shell and connected with the shell through a countersunk head bolt; the replaceable positioning base is provided with a first through hole;
the operation device comprises: the sliding button is arranged outside the shell, a limiting pin is arranged between the sliding button and the shell, the limiting pin penetrates through a circular hole in the side wall of the shell, two ends of the limiting pin are respectively provided with a bulge, the two bulges are respectively arranged inside and outside the shell, and a first spring is sleeved outside one end, in contact with the sliding button, of the limiting pin;
the strain gauge adsorption device comprises: the cylinder, the piston and the strain gauge base are all arranged in the shell, the lower part of the cylinder is a cylinder with a small diameter, a second through hole is formed in the cylinder, a second spring is sleeved outside the cylinder, and the cylinder penetrates through the first through hole in the replaceable positioning base and then is connected with the strain gauge base through friction force; the piston is positioned on the right side in the cylinder, is connected with the connecting rod and moves up and down in the cylinder along with the connecting rod, a third spring is sleeved outside the connecting rod, one end of the third spring is matched with the piston, and the other end of the third spring is matched with a boss arranged on the right side of the cylinder;
the outer wall of the replaceable positioning base is marked with a positioning reticle;
the side wall of the replaceable positioning base is provided with an opening.
2. The device of claim 1, wherein the first through hole of the replaceable positioning base has an upper portion and a lower portion of different sizes and shapes.
3. The device of claim 1, wherein the lower portion of the first through hole of the replaceable positioning base is the same size and shape as the strain gauge.
4. A method for operating a resistance strain gage pasting device, which is based on the device of any one of claims 1-3, and is characterized by comprising the following steps:
when the strain gauge is pasted, the strain gauge is placed in the first through hole of the replaceable positioning base through the opening of the side wall of the replaceable positioning base; the sliding button is pushed downwards, the downward movement distance of the sliding button does not exceed the position of the limiting pin, the air cylinder is limited by the limiting pin and cannot move up and down, and the sliding button drives the piston to move downwards through the connecting rod; the air pressure in the cylinder is reduced, and the strain gauge is fixed on the strain gauge base under the action of the atmospheric pressure; then coating glue on the surface of the test piece, enabling the replaceable positioning base to be tightly attached to the surface of the test piece, and aligning the positioning scribed line on the replaceable base with the marked line on the surface of the test piece; then the sliding button is pushed downwards to the lowest position, the limiting pin is bounced under the action of the first spring, and the whole air cylinder is driven by the sliding button to move downwards; the strain gauge is pushed out from the replaceable positioning base by the strain gauge base and is in close contact with the surface of the test piece; waiting for 5-15 seconds, and releasing the sliding button after the glue is dried.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710264183.1A CN106949828B (en) | 2017-04-21 | 2017-04-21 | Resistance strain gauge pasting device and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710264183.1A CN106949828B (en) | 2017-04-21 | 2017-04-21 | Resistance strain gauge pasting device and working method thereof |
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| Publication Number | Publication Date |
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| CN106949828A CN106949828A (en) | 2017-07-14 |
| CN106949828B true CN106949828B (en) | 2022-10-21 |
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| CN201710264183.1A Active CN106949828B (en) | 2017-04-21 | 2017-04-21 | Resistance strain gauge pasting device and working method thereof |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108398315B (en) * | 2018-01-31 | 2020-07-24 | 中国科学院武汉岩土力学研究所 | Method and device for sticking strain gauge on inner wall of small drill hole in rock stress relief test |
| CN108223522B (en) * | 2018-02-06 | 2023-11-21 | 华侨大学 | Positioning device for sticking Hopkinson pressure bar and strain gauge |
| CN109630521B (en) * | 2019-01-30 | 2023-09-15 | 中南大学 | Resistor strain gauge pasting device |
| CN112361951B (en) * | 2020-11-10 | 2022-07-01 | 水利部产品质量标准研究所 | Pen type auxiliary tool in pasting process of resistance strain gauge |
Citations (7)
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|---|---|---|---|---|
| JP2009098961A (en) * | 2007-10-17 | 2009-05-07 | Toyota Motor Corp | Pressure reducing valve |
| CN102393177A (en) * | 2011-09-06 | 2012-03-28 | 三一重工股份有限公司 | Pasting device for foil gauge |
| CN203495152U (en) * | 2013-09-16 | 2014-03-26 | 苏州凯贸铸造工业有限公司 | Automatic jacking mechanism used in lost form mold |
| CN203772207U (en) * | 2014-03-11 | 2014-08-13 | 河海大学 | Resistance strain gauge bonding apparatus |
| CN105485113A (en) * | 2016-01-22 | 2016-04-13 | 中国工程物理研究院总体工程研究所 | Portable strain gauge bonding device |
| CN205260517U (en) * | 2015-12-22 | 2016-05-25 | 内蒙古工业大学 | Device is pasted to foil gage location |
| CN206724882U (en) * | 2017-04-21 | 2017-12-08 | 南京航空航天大学 | A kind of resistance strain gage sticker |
-
2017
- 2017-04-21 CN CN201710264183.1A patent/CN106949828B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009098961A (en) * | 2007-10-17 | 2009-05-07 | Toyota Motor Corp | Pressure reducing valve |
| CN102393177A (en) * | 2011-09-06 | 2012-03-28 | 三一重工股份有限公司 | Pasting device for foil gauge |
| CN203495152U (en) * | 2013-09-16 | 2014-03-26 | 苏州凯贸铸造工业有限公司 | Automatic jacking mechanism used in lost form mold |
| CN203772207U (en) * | 2014-03-11 | 2014-08-13 | 河海大学 | Resistance strain gauge bonding apparatus |
| CN205260517U (en) * | 2015-12-22 | 2016-05-25 | 内蒙古工业大学 | Device is pasted to foil gage location |
| CN105485113A (en) * | 2016-01-22 | 2016-04-13 | 中国工程物理研究院总体工程研究所 | Portable strain gauge bonding device |
| CN206724882U (en) * | 2017-04-21 | 2017-12-08 | 南京航空航天大学 | A kind of resistance strain gage sticker |
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| CN106949828A (en) | 2017-07-14 |
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