CN212008265U - Device for testing tensile bonding strength of inner hole coating - Google Patents
Device for testing tensile bonding strength of inner hole coating Download PDFInfo
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- CN212008265U CN212008265U CN202020179119.0U CN202020179119U CN212008265U CN 212008265 U CN212008265 U CN 212008265U CN 202020179119 U CN202020179119 U CN 202020179119U CN 212008265 U CN212008265 U CN 212008265U
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Abstract
The utility model discloses a device for testing tensile bonding strength of an inner hole coating, which belongs to the technical field of performance testing and comprises a positioning component, a guide ring, a power-assisted component, a pressure rod and a drag hook, wherein the positioning component is used for clamping a sample to be tested; the guide ring is arranged at the central position of the sample to be detected, and is provided with a guide hole arranged along the axial direction and a guide groove arranged along the radial direction, and the guide groove is communicated with the guide hole; one end of the boosting assembly penetrates through the guide groove, and the other end of the boosting assembly is adhered to the coating on the inner hole of the sample to be detected; the pressure lever is connected with the guide hole in a sliding manner, one end of the pressure lever is a conical surface, and the other end of the pressure lever is provided with a convex part; the drag hook with the guide ring rotates to be connected, the bulge can with the one end butt of drag hook, the other end of drag hook can with helping hand subassembly butt. Not only can carry out tensile bonding strength test to interior curved surface coating, the fender load goes on at same device with the test moreover, improves efficiency of software testing.
Description
Technical Field
The utility model relates to a capability test technical field especially relates to a hole coating tensile bonding strength testing arrangement.
Background
In many important industrial fields, such as petrochemical, aerospace, weaponry and mechanical manufacturing, there are many internal bore type parts that are important to the overall structure, such as automobile engine blocks, gas turbine casings and chemical and petroleum pipelines. Some parts need to work under the harsh conditions of high temperature, high pressure and the like, the requirement on the quality of an inner hole of the part is very high, and in order to improve the quality of the inner hole, various processes are often used for preparing coatings on the surface of the inner hole of important inner hole parts in service.
The bonding strength of the coating and the substrate is a very important index for evaluating the quality of the coating. If the bonding strength of the coating is not up to the standard, the coating can be peeled off in the service process, if the coating is light, the coating cannot protect a substrate, if the coating is heavy, the whole part or the whole equipment is scrapped, and therefore, the bonding strength test of the coating before formal use is crucial.
Conventional coating bond strength tests include tensile bond strength. The tensile bonding strength of the coating refers to the ultimate capacity of the coating to bear tensile stress in the normal direction (vertical to the surface of the coating), and the tensile bonding strength can be used for more visually representing the bonding strength of the coating and a substrate.
The existing tensile bond strength test has the following technical defects:
(1) during testing, the coating is sprayed on the outer edge or the plane, the working condition that the coating on the inner wall of the inner hole piece is sprayed on a curved surface with a certain curvature is greatly different, and the tensile bonding strength of the coating on the inner curved surface and a matrix cannot be evaluated according to a test result.
(2) Before the bonding strength of the existing coating is tested, a special load-holding device is needed in the gluing and heat-preserving stage, so that the coating is tightly combined with a gluing surface, and after the gluing is finished, a testing device needs to be switched, which is troublesome and time-consuming.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a hole coating tensile bonding strength testing arrangement to solve the unable internal curved surface coating that exists among the prior art and test, guarantee to carry and testing arrangement needs the technical problem who frequently switches.
As the conception, the utility model adopts the technical proposal that:
an inner bore coating tensile bond strength testing device, comprising:
the positioning assembly is used for clamping a sample to be detected;
the guide ring is arranged at the central position of the sample to be detected, and is provided with a guide hole arranged along the axial direction and a guide groove arranged along the radial direction, and the guide groove is communicated with the guide hole;
one end of the boosting component is arranged in the guide groove in a penetrating mode, and the other end of the boosting component is bonded with the coating on the inner hole of the sample to be detected;
the pressing rod is connected with the guide hole in a sliding mode, one end of the pressing rod is a conical surface, the other end of the pressing rod is provided with a protruding portion, the conical surface can be abutted to the power assisting assembly, and the pressing rod can apply radial pressure to the coating through the conical surface and the power assisting assembly;
the drag hook, with the guide ring rotates to be connected, the bulge can with the one end butt of drag hook, the other end of drag hook can with helping hand subassembly butt, the depression bar can pass through the drag hook helping hand subassembly is right radial pulling force is applyed to the coating.
Wherein, helping hand subassembly includes:
the adapter is arranged in the guide groove in a penetrating manner;
the friction head is bonded with the coating;
and one end of the friction rod is fixedly connected with the adapter, and the other end of the friction rod is fixedly connected with the friction head.
Wherein, be provided with spacing arch on the adapter, the drag hook can with spacing protruding butt.
Wherein, be provided with spacing hole on the guide ring, spacing downthehole threaded connection has the gag lever post, the bottom of gag lever post can with the adapter butt.
Wherein, the one end of friction lever with adapter threaded connection, the other end of friction lever with friction head threaded connection, the adapter with can set up a plurality ofly between the friction head the friction lever.
Wherein the positioning assembly comprises:
the sample to be detected and the guide ring are arranged on the base;
the upper cover, with the sample butt that awaits measuring, the upper cover with lock through the fastener between the base, the upper cover is the annular, the depression bar can pass the upper cover.
The inner wall of the upper cover is provided with a limiting surface in an annular mode, the limiting surfaces are distributed in a step-shaped mode, and the sample to be tested can be abutted to the limiting surfaces.
Wherein, be provided with the constant head tank on the base, the one end of the sample that awaits measuring is located in the constant head tank.
Wherein, be provided with the spacing groove on the base, the one end of guide ring is located the spacing inslot.
The guide groove is formed in the corresponding group of the power-assisted assemblies, and the drag hooks are arranged corresponding to the power-assisted assemblies in each group.
The utility model has the advantages that:
the utility model provides a hole coating tensile bonding strength testing arrangement, through bonding one end of helping hand subassembly with the coating on the hole, adopt the depression bar to control helping hand subassembly with the help of the drag hook and along radial removal, carry out tensile bonding strength test to the coating on the hole of the sample that awaits measuring, the test result can be used for evaluating the tensile bonding strength of interior curved surface coating and base member; before the test of coating bonding strength, apply to helping hand subassembly through the conical surface with the axial pressure on the depression bar, turn into the radial pressure to the coating to realize the fender load, need not auto-change over device, labour saving and time saving improves efficiency of software testing.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for testing tensile bonding strength of an inner hole coating according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of an apparatus for testing tensile bonding strength of an inner bore coating according to an embodiment of the present invention;
FIG. 3 is an enlarged view at A of FIG. 2;
fig. 4 is a schematic structural diagram of an upper cover according to an embodiment of the present invention;
fig. 5 is a cross-sectional view of a guide ring provided by an embodiment of the present invention;
FIG. 6 is a schematic view of a part of the structure of an apparatus for testing tensile bonding strength of an inner hole coating provided in an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a power assisting assembly according to an embodiment of the present invention;
fig. 8 is a schematic structural view of the retractor according to the embodiment of the present invention;
fig. 9 is a schematic diagram of an apparatus for testing tensile bond strength of an inner hole coating according to an embodiment of the present invention at a preparation stage;
fig. 10 is a schematic view of an apparatus for testing tensile bond strength of an inner hole coating according to an embodiment of the present invention at a testing stage.
In the figure:
10. a sample to be tested;
11. a base; 12. an upper cover; 121. a limiting surface;
2. a guide ring; 21. a guide hole; 22. a guide groove;
3. a boost assembly; 31. an adapter; 32. a friction head; 33. a friction lever;
4. a pressure lever; 41. a conical surface; 42. a projection;
5. pulling a hook;
6. a limiting rod.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
Referring to fig. 1 to 10, an embodiment of the present invention provides a device for testing tensile bonding strength of an inner hole coating, which can carry a coating and a bonding surface before testing, so that the coating and the bonding surface are in close contact; the tensile bond strength of the innercurved coating to the substrate can also be tested. In this embodiment, the sample 10 to be measured is used as a cylinder sleeve for description, and of course, the sample 10 to be measured may also be other components having an inner hole, which is not described herein again.
The device for testing the tensile bonding strength of the inner hole coating comprises a positioning assembly, a guide ring 2, a power-assisted assembly 3, a pressure rod 4 and a draw hook 5, which are described in detail one by one.
The positioning assembly is used for clamping the sample 10 to be tested, and the sample 10 to be tested is prevented from shifting during testing. The positioning assembly can not influence the force application of other parts to the coating of the sample 10 to be measured while clamping the sample 10 to be measured, and is convenient for replacing samples 10 to be measured with different specifications.
The positioning assembly comprises a base 11 and an upper cover 12, wherein the upper cover 12 is locked with the base 11 through a fastener, and the fastener can be a stud. The sample 10 to be tested is placed on the base 11, the upper cover 12 abuts against the sample 10 to be tested, and when the fastener is locked, the upper cover 12 and the base 11 clamp the sample 10 to be tested. In the present embodiment, the base 11 has a disk shape. The upper cover 12 is annular and is convenient for placing other components.
One side of base 11 is provided with the constant head tank, and the one end of the sample 10 that awaits measuring is located the constant head tank, and the other end and the 12 butt of upper cover of the sample 10 that awaits measuring. The opposite side of base 11 is provided with the reference column, is provided with the screw thread on the surface of reference column, and the tensile testing machine of being convenient for presss from both sides tightly and loads, avoids testing the loading in-process and skids.
The inner wall of the upper cover 12 is provided with a limiting surface 121, the limiting surfaces 121 are arranged in a step shape, and the sample 10 to be tested can be abutted to the limiting surfaces 121. The limiting surface 121 is annular, so that the periphery of the sample 10 to be detected can be comprehensively limited. The plurality of limiting surfaces 121 are arranged in a step shape, limit is performed on samples 10 to be measured with different outer diameters, and the method can adapt to the samples 10 to be measured with various specifications so as to obtain the bonding strength of coatings with different curvatures.
The guide ring 2 is arranged on the base 11 and located at the center of the sample 10 to be measured, a limiting groove is arranged on the base 11 corresponding to the guide ring 2, and one end of the guide ring 2 is located in the limiting groove to prevent the guide ring 2 from radially moving. The guide ring 2 has a guide hole 21 provided in the axial direction and a guide groove 22 provided in the radial direction, the guide groove 22 communicating with the guide hole 21.
One end of the boosting component 3 is arranged in the guide groove 22 in a penetrating way, and the other end of the boosting component is adhered to a coating on an inner hole of the sample 10 to be detected; the force on the pressure bar 4 can be transferred to the force boosting assembly 3 and thus to the coating.
The boosting assemblies 3 are provided with at least two groups, the at least two groups of boosting assemblies 3 are uniformly distributed around the circumference of the guide ring 2, and a guide groove 22 is arranged corresponding to each group of boosting assemblies 3. In the present embodiment, four sets of booster assemblies 3 are provided. The four groups of boosting assemblies 3 can synchronously move along the radial direction and simultaneously contact with the coating to realize automatic centering.
The power assisting assembly 3 comprises an adapter 31, a friction head 32 and a friction rod 33, the adapter 31 penetrates through the guide groove 22, the friction head 32 is bonded with the coating, one end of the friction rod 33 is fixedly connected with the adapter 31, and the other end of the friction rod 33 is fixedly connected with the friction head 32. A glue layer is arranged between the friction head 32 and the coating to form a gluing surface for further bonding.
Specifically, one end of the friction head 32 is a cambered surface for matching with a coating on the inner hole, and the other end of the friction head 32 is in threaded connection with the friction rod 33. Meanwhile, the friction rod 33 is in threaded connection with the adapter 31, so that the radial extension length of the power assisting assembly 3 can be adjusted to adapt to samples 10 to be measured with different diameters. When the inner diameter of the sample 10 to be measured is large, a combination of a plurality of friction bars 33 may be used.
In order to let adapter 31 can freely slide in the test process, leave certain clearance between adapter 31 and the fitting surface of guide slot 22, so be provided with spacing hole on guide ring 2, spacing downthehole threaded connection has gag lever post 6, the bottom of gag lever post 6 can with adapter 31 butt. The adapter 31 is pressed through the limiting rod 6 in the test process, and the inaccuracy of the test result caused by the fact that the adapter 31 is overturned is avoided.
The pressure lever 4 is connected with the guide hole 21 in a sliding way, one end of the pressure lever 4 is a conical surface 41, and the other end is provided with a convex part 42. One end of the pressure rod 4 with a conical surface 41 can extend into the guide hole 21, the conical surface 41 can be abutted with the power assisting assembly 3, and the pressure rod 4 can apply radial pressure to the coating through the conical surface 41 and the power assisting assembly 3.
In order to avoid the interference of the adapters 31 on the protrusions 42, the diameter of the protrusions 42 is smaller than that of the rod body of the pressure rod 4, so that the protrusions 42 can penetrate through the space between the four adapters 31 and can be abutted to the draw hooks 5.
The pressure rod 4 can penetrate through the upper cover 12, and the annularly arranged upper cover 12 does not interfere with other parts arranged inside the sample 10 to be measured.
Be provided with spacing arch on adapter 31, drag hook 5 can with spacing protruding butt. The depression bar 4 pushes down the one end of drag hook 5 for drag hook 5 rotates, and the other end of drag hook 5 and helping hand subassembly 3 butt exert radial pulling force to helping hand subassembly 3, and then exert radial pulling force to the coating.
The outer surface of the pressure lever 4 is provided with threads, so that the tensile testing machine can be loaded conveniently. Set up a drag hook 5 corresponding every helping hand subassembly 3 of group, the bottom of depression bar 4 can be simultaneously to all drag hooks 5 application of force, and then drives all helping hand subassemblies 3 synchronous motion simultaneously to realize automatic centering, make guide ring 2 be located the intermediate position of the sample that awaits measuring.
Specifically, when one end of the pressure lever 4 with the tapered surface 41 is located in the guide hole 21, axial pressure is applied to the pressure lever 4, the tapered surface 41 of the pressure lever 4 abuts against the boosting assembly 6, radial pressure is applied to the boosting assembly 3, the boosting assembly 3 extrudes a coating, and then radial pressure is applied to the coating, so that the coating is in close contact with the gluing surface, and load retention is achieved.
When the one end that the depression bar 4 has the bulge 42 is located the guiding hole 21, exert axial pressure on depression bar 4, the bulge 42 of depression bar 4 pushes down drag hook 5 for drag hook 5 rotates, and the tip and the helping hand subassembly 3 butt of drag hook 5 apply radial tension to helping hand subassembly 3, and then apply radial tension to the coating. When the radial tension is sufficiently great, the coating may peel off the sample 10 to be tested. Axial pressure acting on the compression bar 4 is converted into radial tension through the simple draw hook 5, and the problem that the radial tension is difficult to apply on the curved surface of the inner hole is solved.
The embodiment of the utility model provides a hole coating tensile bonding strength testing arrangement is including preparing stage and test stage when using. The force direction is indicated by arrows in the figures.
Referring to fig. 9, in the preparation stage, one end of the pressure rod 4 with the tapered surface 41 is extended into the guide hole 21, and axial pressure is applied to the pressure rod 4, so that the tapered surface 41 is abutted with the power assisting assembly 3, so that radial pressure is applied to the power assisting assembly 3 through the pressure rod 4, and the power assisting assembly 3 is tightly contacted with the coating and is kept for a set time. Specifically, by pushing the pressure rod 4 inward along the guide hole 21 until the tapered surface 41 abuts against the adapter 31, the pressure rod 4 moves vertically downward in fig. 9, so that the adapter 31 is pushed radially outward to move radially, so that the friction rod 33 and the friction head 32 apply radial pressure to the coating, so that the friction head 32 is in close contact with the coating, and is kept at a set temperature for a certain time, so that the adhesive layer is cured.
In order to make the contact area between the friction head 32 and the coating constant, after the coating is formed, the coating on the wall surface of the inner hole and around the friction head 32 is removed, so that the contact area between the friction head 32 and the coating is the area of the arc surface of the friction head 32.
Referring to fig. 10, in the testing stage, that is, when the tensile bonding strength test is performed, one end of the compression bar 4 having the protruding portion 42 is inserted into the guide hole 21, axial pressure is applied to the compression bar 4, in fig. 10, the compression bar 4 is subjected to vertical downward axial pressure, so that the protruding portion 42 of the compression bar 4 is abutted to one end of the draw hook 5, one end of the draw hook 5 is subjected to downward pressure, so that the draw hook 5 rotates relative to the guide ring 2, and further, the other end of the draw hook 5 is abutted to the assisting assembly 3, so as to apply radial tension to the assisting assembly 3, and the assisting assembly 3 is subjected to radial inward radial tension, so that the coating is subjected to radial tension, and the magnitude of the axial pressure applied to the compression bar 4 is recorded to the moment.
The tensile bond strength calculation formula of the coating is as follows:
RH＝(F*L1)/(L2*S*N)＝(F*L1)/(L2*R*θ*H*N)
wherein F is the axial pressure on the pressure lever;
L1the length of the force arm of the pressure lever acting force on the draw hook;
L2the length of the force arm for the drag hook to rotate the acting force of the adapter;
s is the contact area of a single friction head and the coating;
n is the number of the friction heads;
r is the radius of the curved surface corresponding to the single friction head;
theta is an arc angle corresponding to a single friction head;
h is the height of the friction head.
In conclusion, the inner hole coating tensile bonding strength testing device is utilized to realize the following functions:
1. realizes simple and convenient determination of the tensile bonding strength of the inner wall coating of the inner hole part
The device converts the pressure applied on the pressure rod 4 into radial tension applied on the surface of the inner hole coating, and the tensile bonding strength of the coating can be calculated by substituting the instantaneous force when the coating falls off into a formula. According to the convenient test of carrying on of actual demand, improve efficiency of software testing.
2. Realizes the test of the bonding strength of the inner wall coatings of parts with inner holes of different diameters
The samples 10 to be measured with different diameters can be positioned by the plurality of limiting surfaces 121 arranged on the upper cover 12 in the step shape. When the diameter size difference of the inner hole pieces to be tested is large, the coating bonding strength test can be realized by using different numbers of friction rods 33 and friction heads 32 in combination. When the diameter difference is small, the radial position of the rotary joint 31 can be finely adjusted directly by sliding the pressure lever 4 in the guide hole 21, the operation is simple, and the connection is reliable.
3. Realizes the integration of the load protection device and the test device
The device converts the pressure applied to the pressure rod 4 into the radial pressure applied to the surface of the inner hole coating, the coating can be protected and automatically centered when being glued with the friction head 32, the coating and the friction head are tightly combined, the device can protect the pressure rod 4 by applying pressure, an additional device is not needed, the test cost is reduced, the time for frequently replacing different devices is saved, and the efficiency is improved.
The above embodiments have been described only the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and is not departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. An inner bore coating tensile bonding strength testing device, comprising:
the positioning assembly is used for clamping a sample (10) to be measured;
the guide ring (2) is arranged at the central position of the sample (10) to be detected, the guide ring (2) is provided with a guide hole (21) arranged along the axial direction and a guide groove (22) arranged along the radial direction, and the guide groove (22) is communicated with the guide hole (21);
one end of the power-assisted component (3) is arranged in the guide groove (22) in a penetrating way, and the other end of the power-assisted component is adhered to the coating on the inner hole of the sample (10) to be detected;
the pressing rod (4) is connected with the guide hole (21) in a sliding mode, one end of the pressing rod (4) is a conical surface (41), a protruding portion (42) is arranged at the other end of the pressing rod, the conical surface (41) can be abutted to the power assisting assembly (3), and the pressing rod (4) can apply radial pressure to the coating through the conical surface (41) and the power assisting assembly (3);
drag hook (5), with guide ring (2) rotate to be connected, bulge (42) can with the one end butt of drag hook (5), the other end of drag hook (5) can with helping hand subassembly (3) butt, depression bar (4) can pass through drag hook (5) helping hand subassembly (3) are right radial pulling force is applyed to the coating.
2. The bore coating tensile bond strength testing apparatus according to claim 1, wherein the assister assembly (3) comprises:
the adapter (31) is arranged in the guide groove (22) in a penetrating mode;
a friction head (32) bonded to the coating;
and one end of the friction rod (33) is fixedly connected with the adapter (31), and the other end of the friction rod is fixedly connected with the friction head (32).
3. The inner bore coating tensile bonding strength testing device is characterized in that a limiting protrusion is arranged on the adapter (31), and the draw hook (5) can be abutted against the limiting protrusion.
4. The inner bore coating tensile bonding strength testing device as claimed in claim 2, wherein a limiting hole is formed in the guide ring (2), a limiting rod (6) is connected to the limiting hole in a threaded manner, and the bottom end of the limiting rod (6) can abut against the adapter (31).
5. The device for testing the tensile bonding strength of the inner bore coating according to claim 2, wherein one end of the friction rod (33) is in threaded connection with the adapter (31), the other end of the friction rod (33) is in threaded connection with the friction head (32), and a plurality of the friction rods (33) can be arranged between the adapter (31) and the friction head (32).
6. The bore coating tensile bond strength testing apparatus of claim 1, wherein said positioning assembly comprises:
the base (11), the sample (10) to be measured and the guide ring (2) are both arranged on the base (11);
upper cover (12), with the sample (10) butt of awaiting measuring, upper cover (12) with through fastener locking between base (11), upper cover (12) are the annular, depression bar (4) can pass upper cover (12).
7. The inner bore coating tensile bonding strength testing device as claimed in claim 6, wherein a plurality of limiting surfaces (121) are annularly arranged on the inner wall of the upper cover (12), the limiting surfaces (121) are arranged in a step shape, and the sample (10) to be tested can be abutted against the limiting surfaces (121).
8. The inner bore coating tensile bonding strength testing device according to claim 6, characterized in that a positioning groove is arranged on the base (11), and one end of the sample (10) to be tested is positioned in the positioning groove.
9. The inner bore coating tensile bonding strength testing device according to claim 6, wherein a limiting groove is arranged on the base (11), and one end of the guide ring (2) is located in the limiting groove.
10. The inner bore coating tensile bonding strength testing device according to any one of claims 1 to 9, wherein at least two groups of the boosting assemblies (3) are arranged, at least two groups of the boosting assemblies (3) are uniformly distributed around the circumference of the guide ring (2), one guide groove (22) is arranged corresponding to each group of the boosting assemblies (3), and one draw hook (5) is arranged corresponding to each group of the boosting assemblies (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020179119.0U CN212008265U (en) | 2020-02-18 | 2020-02-18 | Device for testing tensile bonding strength of inner hole coating |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020179119.0U CN212008265U (en) | 2020-02-18 | 2020-02-18 | Device for testing tensile bonding strength of inner hole coating |
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