CN114199761B - High-precision instrument applied to measuring strength of bonding sample - Google Patents
High-precision instrument applied to measuring strength of bonding sample Download PDFInfo
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- CN114199761B CN114199761B CN202111588584.5A CN202111588584A CN114199761B CN 114199761 B CN114199761 B CN 114199761B CN 202111588584 A CN202111588584 A CN 202111588584A CN 114199761 B CN114199761 B CN 114199761B
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- sample
- strength
- measuring
- thickness control
- precision instrument
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- 238000003825 pressing Methods 0.000 claims abstract description 35
- 239000002131 composite material Substances 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 12
- 239000012790 adhesive layer Substances 0.000 claims abstract description 7
- 239000000758 substrate Substances 0.000 claims description 21
- 239000000853 adhesive Substances 0.000 claims description 18
- 230000001070 adhesive effect Effects 0.000 claims description 18
- 239000010410 layer Substances 0.000 claims description 11
- 239000003292 glue Substances 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 3
- 229910000639 Spring steel Inorganic materials 0.000 claims description 3
- PYLLWONICXJARP-UHFFFAOYSA-N manganese silicon Chemical compound [Si].[Mn] PYLLWONICXJARP-UHFFFAOYSA-N 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 34
- 238000000034 method Methods 0.000 abstract description 13
- 238000010292 electrical insulation Methods 0.000 description 6
- 239000000565 sealant Substances 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910000601 superalloy Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
Abstract
A high-precision appliance applied to measuring the strength of a bonding sample belongs to the technical field of bonding strength measuring equipment. The method is characterized in that: a sample fixing groove (3) is formed in the pulling and pressing tool (2), a tool bolt hole (6) is formed in the pulling and pressing tool (2) perpendicular to the sample fixing groove (3), and a bolt (4) is arranged in a matched mode; the thickness control device (14) is a U-shaped gasket, and a thickness control bolt hole (15) corresponding to the pulling and pressing tool (2) is formed in the thickness control device (14); the sample comprises a sample base material (8) and a composite material sheet (9), wherein the composite material sheet (9) is movably sleeved at one end of the sample base material (8), sample bolt holes (12) are correspondingly formed in the composite material sheet (9), and an adhesive layer (10) is reserved between the composite material sheet (9) and the sample base material (8). The method has the characteristics of simplicity in operation, high assembly precision, high test efficiency and the like.
Description
Technical Field
A high-precision appliance applied to measuring the strength of a bonding sample belongs to the technical field of bonding strength measuring equipment.
Background
The electrical insulation equipment can be applied to a large number of bonding samples taking composite materials as base materials in the production and development processes, and is used for testing the bonding strength of bonding samples. The strength of the adhesive test piece indirectly influences the design of the insulation system. At present, the existing bonding sample strength testing device is a general device and is not special for bonding samples, so that the samples are easy to slip and serious in extrusion deformation when strength testing is carried out; and the material of the device is 45# steel, so that the strength is low, the device can be deformed in the testing process, and the testing precision can not be ensured. There may be some error in the results of the strength test of the bonded specimen at the time of application.
The patent CN200910021163.7 of northwest agriculture and forestry science and technology university discloses a method for testing the interfacial shear strength of a bonded sample of a sealant and a bonded substrate, wherein the bonded substrate is firstly manufactured into two samples, a slit cavity with a certain size is reserved in the middle, the sealant is filled into the two samples, the bonded substrate and the sealant form a bonded sample as a whole, the bonded sample is maintained for 28 days in an environment with the temperature of 20+/-2 ℃ and the relative humidity of 65+/-5%, the samples are respectively placed into an upper shearing box and a lower shearing box, the upper part is subjected to positive pressure P1, and meanwhile horizontal force P2 is applied. The shear force applied to the sample is measured by the load cell 5. The shear force P2 is applied at a loading rate until it is broken by the shear plane between the adhesive substrate and the sealant, the maximum force measured by the load cell 5 being the shear force resistance. The shear resistance divided by the interface area of the bonded sample is the shear strength of the bonded interface of the bonded substrate and the sealant under positive pressure P1. The patent is also directed to interfacial shear strength, but the shear strength is measured under positive pressure P1 in the upper and lower parts of the test specimen, and the direction of application of the shear force P2 is not on the axis of the test specimen, and the test specimen is also subjected to extrusion and torsional deformation, so that the test accuracy cannot be ensured.
Therefore, a high-precision appliance special for testing the strength of the sample is designed, and the high-precision appliance has important application significance.
Disclosure of Invention
The invention aims to solve the technical problems that: the defect of the prior art is overcome, and the high-precision instrument which is simple to operate, reliable in precision and applicable to batch test and applied to the strength of the bonding samples is provided.
The technical scheme adopted for solving the technical problems is as follows: the high-precision instrument for measuring the strength of the bonding sample is characterized in that: comprises a pulling and pressing tool, a sample and at least one thickness control device.
The pulling and pressing tool is provided with a sample fixing groove, is provided with a tool bolt hole perpendicular to the sample fixing groove and is matched with a bolt; the thickness control device is a U-shaped gasket, and a thickness control bolt hole corresponding to the pulling and pressing tool is formed in the thickness control device.
The sample comprises a sample substrate and a composite material sheet, wherein the composite material sheet is movably sleeved at one end of the sample substrate, a sample bolt hole is correspondingly formed in the composite material sheet, a filling cavity is reserved between the composite material sheet and the sample substrate, and the filling cavity is used for filling glue to be tested to form an adhesive layer.
The invention provides a pulling and pressing tool and a matched sample form for electrical insulation equipment, and aims to simply and rapidly measure the bonding strength of bonding samples. The pulling and pressing tool and the sample are fixed through the bolt, so that the sliding of the sample is fundamentally stopped, and the testing accuracy is ensured; sample substrate and combined material piece cover are established for the test glue forms annular distribution, when pulling and drawing the pressure frock, can exert the pulling force on same axis, and sample and bonding glue layer atress are even, and the bonding strength of survey is accurate reliable, also accords with the operational environment of electrical insulation equipment, guarantees that insulation equipment's design satisfies the user demand.
Preferably, the outside of drawing and pressing frock be equipped with draw and press the integrative clamping part of frock. The outside of drawing and pressing the frock add with draw and press the integrative clamping part of frock, can conveniently draw the fixed of pressing the frock, guarantee that the test is quick, stable going on.
Preferably, the surface of the clamping part is provided with an anti-slip surface. After the anti-slip surface is arranged on the surface of the clamping part, the fixture is more stable to fix. The anti-slip surface may be a plurality of crossed anti-slip grooves formed directly on the surface of the clamping part, or may be an external anti-slip surface added in a riveting or embedding manner.
Preferably, the pulling and pressing tool is made of alloy steel, wear-resistant steel or silicon-manganese spring steel for engineering structures. The material of the pulling and pressing tool adopts high-performance alloy steel, so that the strength and toughness of the pulling and pressing tool are guaranteed.
Preferably, the difference between the thicknesses of the thickness control devices is 0.2 mm-10 mm. The thickness control device is used for preventing the whole thickness of the sample and the width of the sample fixing groove from being in a clearance so as to generate shaking. If a gap exists between the sample and the sample fixing groove in the measuring process, a thickness control device with proper thickness can be selected to be filled between the sample and the sample fixing groove, so that shaking is avoided.
Preferably, the inner surfaces of the sample fixing groove and the thickness control device are provided with an anti-slip layer. The anti-slip layer of sample fixed slot and thickness controlling means internal surface can increase the frictional force between frock and the sample that draws to press, better avoiding the sample to rock.
Preferably, the groove type width D1 of the sample fixing groove and the thickness D1 of the sample substrate of the sample meet D1-D1 less than or equal to 0.6mm; the bolt aperture D2 of the tool bolt hole and the sample bushing aperture D2 of the sample meet the requirement that D2-D2 is less than or equal to 0.2mm. The sample should be prepared so as to satisfy the above conditions. The relative stability between the two can be better ensured, the axis position is ensured, and the measured value is accurate.
Preferably, the sample is provided with an eccentric wedge clamp in a matching way.
Preferably, the outer end of the sample is provided with an end auxiliary antiskid sheet.
During the test, the special eccentric wedge-shaped clamp clamps the end part of the sample with the auxiliary anti-slip sheet at the end part, the other end of the sample is inserted into the strength testing device (the surface of the clamping end of the device is subjected to anti-slip and wear-resistant treatment), and the sample is fixedly connected by a bolt with a locking mechanism, so that the connection of each part is convenient and quick, the stability and reliability of the whole device can be ensured, and the measurement precision can be ensured.
Preferably, the latch is provided with a locking mechanism. The locking mechanism of the bolt can prevent the bolt from accidentally falling out.
Compared with the prior art, the high-precision instrument for measuring the strength of the bonding sample has the following beneficial effects: the invention provides a pulling and pressing tool and a matched sample form for electrical insulation equipment, and aims to simply and rapidly measure the bonding strength of bonding samples. The pulling and pressing tool and the sample are fixed through the bolt, so that the sliding of the sample is fundamentally stopped, and the testing accuracy is ensured; sample substrate and combined material piece cover are established for the test glue forms annular distribution, when pulling and drawing the pressure frock, can exert the pulling force on same axis, and sample and bonding glue layer atress are even, and the bonding strength of survey is accurate reliable, also accords with the operational environment of electrical insulation equipment, guarantees that insulation equipment's design satisfies the user demand.
The device can realize the testing of tensile strength, shearing strength and the like of the bonding sample on the electrical insulation equipment. Through practical use, the detection effect is reliable, reaches bonding sample strength test requirement. The adhesive sample measuring instrument has the characteristics of simple operation, high assembly precision, high test efficiency and the like, can reduce the influence of human factors, and is suitable for the purpose of batch test.
Drawings
The technical solution of the present invention will be described in further detail below with reference to the accompanying drawings and examples, but it should be understood that these drawings are designed for the purpose of illustration only and thus are not limiting the scope of the present invention. Moreover, unless specifically indicated otherwise, the drawings are intended to conceptually illustrate the structural configurations described herein and are not necessarily drawn to scale.
FIG. 1 is a schematic diagram of a high-precision tool for measuring the strength of an adhesive sample according to the present invention.
FIG. 2 is a schematic view of a thickness control device of a high-precision tool for measuring the strength of an adhesive sample according to the present invention.
Fig. 3 is a schematic view of an adhesive sample of a test tool applied to a high-precision tool for measuring the strength of the adhesive sample according to the present invention.
The clamping part 2, the pulling and pressing tool 3, the sample fixing groove 4, the bolt 5, the anti-slip surface 6, the tool bolt hole 7, the locking mechanism 8, the sample substrate 9, the composite sheet 10, the bonding layer 11, the bushing 12, the sample bolt hole 13, the end auxiliary anti-slip sheet 14, the thickness control device 15, the thickness control bolt hole D1, the slot position width D2 bolt hole diameter D1 and the sample substrate thickness D2 sample bushing hole diameter.
Detailed Description
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 present application. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and the terms "comprising" and "having" and any variation thereof are intended to cover a non-exclusive inclusion, e.g., a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.
Referring to fig. 1-3, the embodiment provides a high-precision apparatus for measuring the strength of an adhesive sample, which comprises a clamping part 1, a pulling and pressing tool 2, a bolt 4, an anti-slip surface 5, a locking mechanism 7, a sample substrate 8, a composite material sheet 9, an adhesive layer 10, a bushing 11, an end auxiliary anti-slip sheet 13 and a thickness control device 14; the drawing and pressing tool 2 is provided with a sample fixing groove 3, and the drawing and pressing tool 2 is provided with a tool bolt hole 6 perpendicular to the sample fixing groove 3 and is provided with a bolt 4 in a matching way; the thickness control device 14 is a U-shaped gasket, and a thickness control bolt hole 15 corresponding to the pulling and pressing tool 2 is formed in the thickness control device 14; the composite material sheet 9 is movably sleeved at one end of the sample base material 8, a sample bolt hole 12 is correspondingly formed in the composite material sheet 9, a filling cavity is reserved between the composite material sheet 9 and the sample base material 8, and the filling cavity is used for filling glue to be tested to form an adhesive layer 10. The pulling and pressing tool 2 and the sample are fixed through the bolt 4 with the locking mechanism 7, so that the sliding of the sample is fundamentally prevented, and the testing accuracy is ensured; the sample base material 8 and the composite material sheet 9 are sleeved, so that the test glue forms an annular bonding layer 10, when the pulling and pressing tool 2 is pulled and pressed, pulling force can be applied in the same axial direction, the stress of the sample and the bonding layer 10 is uniform, and the measured bonding strength is accurate and reliable; the clamping part 1 integrated with the pulling and pressing tool is arranged outside the pulling and pressing tool 2; the fixture can be conveniently fixed; the surface of the clamping part 1 is provided with an anti-slip surface 5. The anti-slip surface 5 may be a plurality of intersecting anti-slip grooves formed directly in the surface of the clamping portion, or may be a peripheral anti-slip surface added by caulking, embedding, or the like. The drawing and pressing tool 2 is made of alloy steel, wear-resistant steel or silicon-manganese spring steel for engineering structures, and the strength and toughness of the drawing and pressing tool are guaranteed. The difference between the thicknesses of the thickness control devices 14 is 0.2 mm-10 mm, and if a gap exists between the sample and the sample fixing groove in the measuring process, the thickness control device with proper thickness can be selected to be padded between the sample and the sample fixing groove, so that shaking is avoided; the inner surfaces of the sample fixing groove 3 and the thickness control device 14 are provided with an anti-slip layer to increase the friction force between the pulling and pressing tool 2 and the sample. According to the test requirement of the bonding sample, the main body structure (groove type) of the testing tool is designed: the groove width D1 of the sample fixing groove 3 and the thickness D1 of the sample substrate of the sample meet D1-D1 less than or equal to 0.6mm; the diameter D2 of the tool bolt hole and the diameter D2 of the sample bushing of the sample meet the requirement that D2-D2 is less than or equal to 0.2mm. The end auxiliary antiskid sheet 13 is arranged at the outer end of the sample and is provided with an eccentric wedge type clamp in a matching way. During the test, the end part of the sample is clamped by a special eccentric wedge-shaped clamp, the other end of the special eccentric wedge-shaped clamp is inserted into the sample fixing groove 3 of the strength test device, and the special eccentric wedge-shaped clamp is fixedly connected by the bolt 4 with the locking mechanism 7, so that the connection of all parts is convenient and quick, the stability and reliability of the whole device can be ensured, and the measurement accuracy can be ensured.
The working process comprises the following steps: firstly, preparing a sample, namely selecting a sample substrate 8 and a composite material sheet 9 according to the thickness of a glue layer of actual electric insulation equipment to prepare an adhesive sample of the invention; filling glue to be tested into a filling cavity between the composite material sheet 9 and the sample substrate 8, and curing to form an adhesive layer 10; the end auxiliary antiskid sheet 13 of the end of the bonding sample is clamped and fixed by a special eccentric wedge-shaped clamp, one end of the bonding sample with the bonding layer 10 is inserted into the sample fixing groove 3 of the strength testing device, and a thickness control device 14 with proper thickness is selected to be padded between the bonding sample and the sample fixing groove 3, so that the bonding sample and the sample fixing groove are tightly spliced without shaking; the bolt 4 with the locking mechanism 7 is inserted into the tool bolt hole 6 (simultaneously inserted into the thickness control bolt hole 15 and the sample bolt hole 12) to fixedly connect the two, so that sliding is prevented. The clamping part 1 of the pulling and pressing tool 2 is fixed on a pulling machine. The eccentric wedge-shaped clamp is fixed on the positioning pile; and starting a tension machine, and continuously increasing the tension applied to the tension tool 2 until the composite material sheet 9 and the sample substrate 8 slide relatively, and recording the tension when the relative sliding happens. And the shear strength of the adhesive sample was calculated by combining the area of the adhesive layer 10. In the measuring process, each part is connected conveniently and rapidly, the stability and reliability of the whole instrument can be ensured, and the measuring precision is ensured.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the invention in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (8)
1. A high-precision instrument for measuring the strength of an adhesive sample is characterized in that: comprises a pulling and pressing tool (2), a sample and at least one thickness control device (14);
the drawing and pressing tool (2) is provided with a sample fixing groove (3), the drawing and pressing tool (2) is provided with a tool bolt hole (6) perpendicular to the sample fixing groove (3), and is provided with a bolt (4) in a matching way; the thickness control device (14) is a U-shaped gasket, and a thickness control bolt hole (15) corresponding to the pulling and pressing tool (2) is formed in the thickness control device (14);
the sample comprises a sample substrate (8) and a composite material sheet (9), wherein the composite material sheet (9) is movably sleeved at one end of the sample substrate (8), a sample bolt hole (12) is correspondingly formed in the composite material sheet (9), a filling cavity is reserved between the composite material sheet (9) and the sample substrate (8), and the filling cavity is used for filling glue to be tested to form an adhesive layer (10);
the sample is provided with an eccentric wedge clamp in a matching way;
the bolt (4) is provided with a locking mechanism (7).
2. A high precision instrument for measuring the strength of an adhesive sample according to claim 1, wherein: the outside of drawing and pressing frock (2) be equipped with draw and press frock (2) integrative clamping part (1).
3. A high precision instrument for measuring the strength of an adhesive sample according to claim 2, wherein: the surface of the clamping part (1) is provided with an anti-slip surface (5).
4. A high precision instrument for measuring the strength of an adhesive sample according to claim 1, wherein: the drawing and pressing tool (2) is made of alloy steel, wear-resistant steel or silicon-manganese spring steel for engineering structures.
5. A high precision instrument for measuring the strength of an adhesive sample according to claim 1, wherein: the difference between the thicknesses of the thickness control devices (14) is 0.2 mm-10 mm.
6. A high precision instrument for measuring the strength of an adhesive sample according to claim 1, wherein: the inner surfaces of the sample fixing groove (3) and the thickness control device (14) are provided with anti-slip layers.
7. A high precision instrument for measuring the strength of an adhesive sample according to claim 1, wherein: the groove type width D1 of the sample fixing groove (3) and the thickness D1 of the sample base material of the sample meet the requirement that D1-D1 is less than or equal to 0.6mm; the bolt aperture D2 of the tool bolt hole (6) and the sample bushing aperture D2 of the sample meet the requirement that D2-D2 is less than or equal to 0.2mm.
8. A high precision instrument for measuring the strength of an adhesive sample according to claim 1, wherein: the outer end of the sample is provided with an end auxiliary antiskid sheet (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111588584.5A CN114199761B (en) | 2021-12-23 | 2021-12-23 | High-precision instrument applied to measuring strength of bonding sample |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111588584.5A CN114199761B (en) | 2021-12-23 | 2021-12-23 | High-precision instrument applied to measuring strength of bonding sample |
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| Publication Number | Publication Date |
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| CN114199761A CN114199761A (en) | 2022-03-18 |
| CN114199761B true CN114199761B (en) | 2024-02-27 |
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| CN114199761A (en) | 2022-03-18 |
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