Inner hole coating bonding strength detection device

Abstract

The invention discloses an inner hole coating bonding strength detection device, and belongs to the field of inner hole coating detection. Comprising a test assembly, a control assembly for controlling the test assembly, and a signal transmission assembly for transmitting a test result, the product to be tested is fixed on the test board through the positioning clamp; the test assembly extends into the inner hole of the product to be tested through the control assembly so as to control the scribing track, the scribing position and the scribing pressure of the test assembly; the test signal of the test assembly in the test process is obtained through the signal transmission assembly, and the test signal is transmitted to the control assembly to be displayed so as to assist man-machine interaction in the test process. According to the method, the problems of low detection precision of the inner hole pattern layer and bonding strength difference caused by incapability of quantitatively analyzing different process parameters in the prior art are solved.

Description

Technical Field

[0001] The invention belongs to the field of inner hole coating detection, and in particular relates to an inner hole coating bonding strength detection device. Background Art

[0002] The service environment of internal hole parts is relatively harsh, which often causes different forms and degrees of damage to the inner wall, leading to the failure of parts, causing safety hazards and greatly increasing engineering costs. Therefore, strengthening the surface of the inner hole of parts to enhance their wear resistance and corrosion resistance is an important topic in the current engineering community. Metal material surface strengthening technology includes surface modification technology, surface alloying technology, surface conversion film technology, surface coating technology, etc. Among them, surface coating technology refers to the formation of a coating on the surface of the substrate by physical and chemical methods to enhance the performance of the parts. Compared with other methods, surface coating technology will not destroy the shape and performance of the parts themselves, the protective layer formed is thicker, and the scope of use is wider. It is now the main means of internal hole strengthening.

[0003] The main failure mode of coating is the peeling and falling off of the coating material and the substrate due to insufficient adhesion. Therefore, the bonding strength of the coating is a key indicator for evaluating the performance of spray coatings. The scratch method is currently used to detect the bonding strength of the coating. The basic principle of the scratch method is to gradually apply force to the coating surface with a hard tool to produce scratches and observe the response of the coating. As the applied load increases, the coating may suffer different forms of damage, such as scratches, peeling, and falling off. The bonding strength between the coating and the substrate is evaluated based on the failure mode and load value of the coating under different loads. Existing scratch testers are mainly used to test the bonding strength of coatings on flat parts. They are not suitable for testing the bonding strength of coatings on the inner holes of cylindrical parts. It is often necessary to cut the cylindrical parts into small specimens, but smaller parts are difficult to cut, and cutting will affect the performance of the coating; at the same time, the coating will be affected by force and heat during the cutting process, resulting in changes in performance, and accurate detection cannot be performed.

[0004] At present, the detection method of inner hole coating generally can only rely on visual method, which has poor accuracy and cannot quantitatively analyze the difference in bonding strength caused by different process parameters. Therefore, the present invention designs an inner hole coating bonding strength detection device, which can directly detect the bonding strength of the inner hole coating of the cylindrical part, simplify the detection steps, improve the detection accuracy, and provide a data basis for the optimization of the spraying process. Summary of the invention

[0005] Technical issues to be solved:

[0006] In order to avoid the shortcomings of the prior art, the present invention provides an inner hole coating bonding strength detection device, which extends the testing part of the test assembly into the inner hole, and controls the position, line track and applied pressure strength of the test part through the driving part to realize the testing of different pressure strengths of the inner hole coating. The present invention solves the problems of low detection accuracy of the inner hole coating and the inability to quantitatively analyze the difference in bonding strength caused by different process parameters in the prior art.

[0007] The technical solution of the present invention is: an inner hole coating bonding strength detection device, comprising a test component, a control component for controlling the test component, and a signal transmission component for transmitting the test result;

[0008] Fix the product to be tested on the test bench by using a positioning fixture;

[0009] The test component is extended into the inner hole of the product to be tested through the control component to control the scoring track, scoring position and scoring pressure of the test component;

[0010] The test signal of the test component during the test process is obtained through the signal transmission component, and the test signal is transmitted to the control component for display to assist human-computer interaction during the test process.

[0011] A further technical solution of the present invention is: the test component includes a marking module, which is connected to the driving module of the control component through a bracket, and the marking position is adjusted axially or circumferentially through the driving module, as well as the radial feed distance of the marking module to determine the marking trajectory and the marking pressure intensity.

[0012] A further technical solution of the present invention is that the line engraving module is a diamond indenter.

[0013] A further technical solution of the present invention is: the control assembly includes a support platform, a two-degree-of-freedom drive module for controlling the test platform, and a linear drive module for controlling the displacement of the bracket relative to the support platform; a slide groove is provided on the support platform, which is slidably connected to the bracket mounted thereon;

[0014] The two-degree-of-freedom driving module is used to control the lifting height of the test bench along its axial direction and the rotation angle around its axial direction, thereby controlling the extension position and relative rotation angle of the marking module in the inner hole;

[0015] The linear drive module is used to control the linear movement of the bracket along the slide slot, thereby controlling the pressure applied by the engraving module to the inner hole layer of the product to be tested.

[0016] A further technical solution of the present invention is: the bracket is L-shaped, and its arm parallel to the central axis of the inner hole of the product to be tested is connected to the linear drive module, and the end of the arm perpendicular to the central axis of the inner hole of the product to be tested is equipped with a diamond indenter and faces the inner hole wall of the product to be tested;

[0017] A slider is provided at one end of the bracket connected to the linear drive module, and a reinforcing rib is provided at the root of the slider, which is slidably connected to the slide groove on the support platform through the bottom slider; a driving rod is coaxially arranged at the bottom of the slider, and the driving rod is driven by the linear drive module to drive the bracket to perform linear motion.

[0018] A further technical solution of the present invention is: the control component also includes a switch, a control panel, and an adjustment knob arranged on the controller, and the switch is used to control the opening or closing of the entire detection device; the control panel outputs control instructions to the two-degree-of-freedom drive module and the linear drive module to control the initial position of the diamond indenter, control the moving distance and rate of the slider, and control the rotation speed or lifting speed of the test bench; the movement mode of the test bench is switched by the adjustment knob, and the movement mode of the test bench can be switched by turning the adjustment knob to a specified position to make it rotate or lift.

[0019] A further technical solution of the present invention is: the main body of the test bench is an annular plate, the outer edge of the annular plate extends a limiting boss axially to one side, and a plurality of radial threaded holes are opened on the circumferential surface of the limiting boss, and an adjusting screw is installed in the radial threaded hole as a positioning fixture; the product to be tested coaxially installed on the annular plate of the test bench is radially limited by screwing the adjusting screw, and a rubber gasket is installed on the head of the adjusting screw to protect the product to be tested.

[0020] A further technical solution of the present invention is: the signal transmission component comprises a force sensor and an acoustic sensor mounted on a bracket, a force signal display screen and an acoustic signal display screen mounted on a controller, and the force sensor, the acoustic sensor and the controller are connected via a force sensor data line and an acoustic sensor data line respectively;

[0021] The force signal obtained by the force sensor is displayed on the force signal display screen, and the force signal change during the test is displayed in real time on the force signal display screen to determine the bonding strength;

[0022] The acoustic signal obtained by the acoustic sensor is displayed on the acoustic signal display screen, and the change of the acoustic signal during the test is displayed in real time on the acoustic signal display screen to assist in determining the bonding strength;

[0023] It is connected to external analysis equipment and equipment for extracting test results through the data interface installed on the controller.

[0024] A method for detecting the bonding strength of inner hole coating, the specific steps are:

[0025] Install the product to be tested on the test bench through the positioning fixture;

[0026] Output control instructions according to the determined detection position, and the two-degree-of-freedom drive module controls the position of the test bench relative to the marking module, so that the marking module is relative to the initial position of the detection;

[0027] Start the detection device, adjust the axial position and circumferential rotation angle of the test bench according to the set scoring trajectory, and adjust the feed distance of the scoring module according to the set pressure;

[0028] The force sensor and the acoustic sensor send the collected test signals to the controller to obtain the change curves of the force signal and the acoustic signal to complete the detection.

[0029] A further technical solution of the present invention is that the signal receiving end of the controller is provided with an analog-to-digital signal converter, an amplifier, and a filter to convert the received electrical signal into a digital signal and display it on a display screen.

[0030] Beneficial Effects

[0031] The beneficial effects of the present invention are as follows: the present invention separates the test bench and the test assembly, and drives and controls the two separately through a two-degree-of-freedom drive module and a linear drive module, realizes the adjustment of the extended position of the test assembly in the inner hole by controlling the lifting position of the test bench, and indirectly controls the pressure strength applied to the inner hole wall by the marking module by controlling the sliding distance of the bracket; because the test assembly is independently designed, its structure volume is small, and it can meet the versatility of various inner hole sizes while ensuring the test accuracy. The specific advantages are as follows:

[0032] 1. The detection device of the present invention is easy to disassemble and carry, and has few requirements for usage scenarios.

[0033] 2. The detection device of the present invention directly detects the bonding strength of the inner hole coating, eliminating the sample cutting process, improving the detection efficiency, and facilitating the optimization of process parameters.

[0034] 3. The detection device of the present invention can meet the requirements of axial and circumferential coating bonding strength detection of inner hole samples through relative movement of the test bench.

[0035] 4. The detection device of the present invention can replace the bracket size and adjust the adjustment screw to adapt to the detection requirements of the inner holes of cylindrical parts with different tube lengths and different apertures, and has universality. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is an overall schematic diagram of an inner hole coating bonding strength detection device in an embodiment of the present invention;

[0037] Figure 2 is a schematic diagram of a test bench and a test assembly in an embodiment of the present invention;

[0038] Figure 3 Schematic diagram of the connection between the bracket and the slider in an embodiment of the present invention.

[0039] Explanation of the accompanying reference numerals: 1. Specimen; 2. Force signal display screen; 3. Switch; 4. Control panel; 5. Adjustment knob; 6. Test bench; 7. Adjustment screw; 8. Acoustic signal display screen; 9. Data interface; 10. Rubber gasket; 11. Diamond indenter; 12. Force sensor; 13. Force sensor data cable; 14. Acoustic sensor; 15. Bracket; 16. Slide; 17. Acoustic sensor data cable; 18. Slider; 19. Reinforcing rib; 20. Screw; 21. Support table; 22. Controller. DETAILED DESCRIPTION

[0040] The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0042] Based on the problems of poor accuracy of existing inner hole coating detection methods and the inability to quantitatively analyze the differences in bonding strength caused by different process parameters, the present invention exemplarily proposes an inner hole coating bonding strength detection device, including a test component, a control component for controlling the test component, and a signal transmission component for transmitting the test results; the product to be tested is fixed on the test bench by a positioning fixture; the test component is extended into the inner hole of the product to be tested by the control component to control the engraving trajectory, engraving position and engraving pressure of the test component; the test signal of the test component during the test process is obtained by the signal transmission component, and the test signal is transmitted to the control component for display, so as to assist human-computer interaction during the test process.

[0043] The above technical solution is further described below with reference to the accompanying drawings and examples:

[0044] In one embodiment, referring to Figure 1 As shown, in this embodiment, an inner hole coating bonding strength detection device includes a controller and a test bench and a test component mounted thereon, and the controller includes a control component and a signal transmission component.

[0045] In the example, the control assembly includes a switch 3, a control panel 4, and an adjustment knob 5 arranged on the controller. The switch 3 is used to control the power of the device to be turned on or off; the control panel 4 is used to control the initial position of the diamond indenter 11, the moving distance and speed of the control slider 18, and the rotation speed or lifting speed of the test bench 6; the adjustment knob 5 is used to switch the movement mode of the test bench 6. By turning the adjustment knob 5 to a specified position, the movement mode of the test bench 6 can be switched to make it rotate or lift.

[0046] In the example, the control assembly also includes a support platform 21 and a two-degree-of-freedom drive module and a linear drive module placed in the controller. The support platform 21 is provided with a slide groove 16, which is slidably connected to the bracket 15 mounted thereon;

[0047] For example, the two-degree-of-freedom driving module is used to control the lifting height of the test bench along its axial direction and the rotation angle around its axial direction, thereby controlling the extension position and relative rotation angle of the marking module in the inner hole;

[0048] For example, the linear drive module is used to control the linear movement of the bracket along the slide slot, thereby controlling the pressure applied by the engraving module to the inner hole coating of the product to be tested.

[0049] In one embodiment, referring to Figure 2 As shown, the main body of the test bench 6 described in this embodiment is an annular plate, and a limiting boss is extended axially to one side at the outer edge of the annular plate, and a plurality of radial threaded holes are opened circumferentially on the circumferential surface of the limiting boss, and an adjusting screw 7 is installed in the radial threaded hole as a positioning fixture; by screwing the adjusting screw 7, the product to be tested coaxially installed on the annular plate of the test bench is radially limited, and a rubber gasket 10 is installed on the head of the adjusting screw to protect the product to be tested.

[0050] In this example, the test assembly includes a diamond indenter 11, a bracket 15, a slide 16, a slider 18, a reinforcing rib 19, and a screw 20. The test bench 6 is located at the top of the device and is separated from the main body of the device. The test bench 6 is connected to the internal two-degree-of-freedom drive module and can perform lifting or rotating movements. The outer ring of the test bench 6 is convex with a threaded hole; the adjustment screw 7 is screwed in through the threaded hole of the outer ring of the test bench 6 to position and clamp the sample 1; the rubber gasket 10 is installed at the bottom of the adjustment screw 7. When the adjustment screw 7 is screwed into the sample 1, the rubber gasket 10 is located between the adjustment screw 7 and the sample 1 to protect the outer wall of the sample 1. At the same time, the deformation of the rubber gasket 10 can ensure that the sample 1 is fully clamped to prevent the result error caused by the instability of the sample 1 during the test; the diamond indenter 11 is installed on the top of the bracket 15;

[0051] For example, refer to Figure 3As shown, the bracket 15 is L-shaped, and its arm parallel to the central axis of the inner hole of the product to be tested is connected to the linear drive module, and the end of the arm perpendicular to the central axis of the inner hole of the product to be tested is equipped with a diamond indenter 11 and faces the inner hole wall of the product to be tested; the bracket 15 is connected to the slider 18 by screws 20, and the bracket 15 is provided with reinforcing ribs 19 to prevent the result error caused by the shaking of the bracket 15 during the test; the slider 18 is connected to the linear drive module inside the device through the slide groove 16 at the top of the device, and can move in a straight line in the slide groove 16 to achieve the change of applied force and the adaptation of samples 1 with different calibers.

[0052] In the example, the signal transmission component includes a force signal display screen 2, an acoustic signal display screen 8, a data interface 9, a force sensor 12, a force sensor data line 13, an acoustic sensor 14, and an acoustic sensor data line 17. The force signal display screen 2 is used to display the changes of the force signal during the test in real time, so as to determine the bonding strength; the acoustic signal display screen 8 is used to display the changes of the acoustic signal during the test in real time, and to assist in determining the bonding strength; the data interface 9 can be used to connect other analysis equipment and extract test results; the force sensor 9 is installed on the bracket 15 to receive the changes of the force during the test; the force sensor data line 13 connects the force sensor 9 with the device body, and is used to transmit the signal received by the force sensor 9 to the device; the acoustic sensor 14 is used to receive the changes of the sound during the test; the acoustic sensor data line 17 connects the acoustic sensor 14 with the device body, and is used to transmit the signal received by the acoustic sensor 14 to the device.

[0053] In another embodiment, a method for detecting the bonding strength of an inner hole coating comprises the following specific steps:

[0054] Step 1: Install the product to be tested on the test bench through the positioning fixture;

[0055] Step 2: Output a control instruction according to the determined detection position, and the two-degree-of-freedom drive module controls the position of the test bench relative to the marking module, so that the marking module is relative to the initial position of the detection;

[0056] Step 3: Start the detection device, adjust the axial position and circumferential rotation angle of the test bench according to the set scoring trajectory, and adjust the feed distance of the scoring module according to the set pressure;

[0057] Step 4: The force sensor and the acoustic sensor send the collected test signals to the controller to obtain the change curves of the force signal and the acoustic signal to complete the detection.

[0058] In one embodiment, the signal receiving end of the controller is provided with an analog-to-digital signal converter, an amplifier, and a filter, which converts the received electrical signal into a digital signal and displays it on a display screen.

[0059] The following uses the axial detection of the inner hole bonding strength of a cylindrical specimen as an example to illustrate the use of the device:

[0060] (1) Place the sample 1 to be tested on the test bench 6, and screw the adjustment screw 7 through the threaded hole on the outer ring of the test bench 6 until the rubber gasket 10 contacts the sample 1 and clamps the sample, thus completing the sample installation.

[0061] (2) Turn on the switch 3 to start the power supply of the detection device, rotate the adjustment knob 5 to put the test table 6 in the lifting and lowering motion mode, and set the movement rate of the slider 18 and the rising rate of the test table 6 through the control panel 4 to adjust the rate of change of the force applied by the diamond indenter 11 to the sample 1; at the same time, adjust the relative position of the slider 18 in the slide groove 16 so that it contacts the sample 1, and complete the test preparation work.

[0062] (3) Start the internal driving component through the control panel 4, the slider 18 drives the bracket 15 to move toward the sample 1, so that the diamond indenter 11 applies a gradually increasing force to the surface of the inner hole coating of the sample 1. At this time, the reinforcing ribs 19 of the bracket 15 can ensure the stability of the bracket 15 during the loading process, and the test bench 6 slowly rises at a set rate. Under the combined action of the two, scratches will be generated on the surface of the inner hole coating of the sample 1. The force sensor 12 and the acoustic sensor 14 will collect the coating response signal during this process, and transmit the response signal to the detection device through the force sensor data line 13 and the acoustic sensor data line 17, and display it on the force signal display screen 2 and the acoustic signal display screen 8.

[0063] (4) When the membrane-base bonding fails, the force signal curve and acoustic signal curve of the coating will change suddenly, but large particles on the coating surface may also cause a sudden change in the force signal, and external sound interference may also cause a sudden change in the acoustic signal. Therefore, in order to ensure the accuracy of the experimental results, the judgment condition for coating failure is that when a sudden change in the curve is observed on the force signal display screen 2 and the acoustic signal display screen 8 at the same time, the load at this time is taken as the critical load. At this time, the internal drive component is turned off through the control panel 4, and the test bench 6 and the slider 18 stop moving, completing the inner hole coating bonding strength test.

[0064] (5) After the test is completed, the slider 18 and the test bench 6 are reset through the control panel 4, the adjustment screw 7 is rotated, the sample 1 is removed, the experimental data is exported through the data interface 9, and the switch 3 is turned off. The inner hole coating bonding strength test of the sample 1 is completed.

[0065] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and intent of the present invention.

Claims

1. An inner hole coating bonding strength detection device, characterized in that: It includes a test component, a control component for controlling the test component, and a signal transmission component for transmitting the test result; Fix the product to be tested on the test bench by using a positioning fixture; The test component is extended into the inner hole of the product to be tested through the control component to control the scoring track, scoring position and scoring pressure of the test component; The test signal of the test component during the test process is obtained through the signal transmission component, and the test signal is transmitted to the control component for display to assist human-computer interaction during the test process.

2. According to claim 1, a device for detecting bonding strength of inner hole coating, characterized in that: The test assembly includes a marking module, which is connected to a driving module of a control assembly via a bracket. The driving module is used to adjust the marking position axially or circumferentially, and the radial feed distance of the marking module is adjusted to determine the marking trajectory and marking pressure intensity.

3. The inner hole coating bonding strength detection device according to claim 2, characterized in that: The engraving module is a diamond indenter.

4. The inner hole coating bonding strength detection device according to claim 1, characterized in that: The control assembly includes a support platform, a two-degree-of-freedom drive module for controlling the test platform, and a linear drive module for controlling the displacement of the bracket relative to the support platform; a slide groove is provided on the support platform, which is slidably connected to the bracket mounted thereon; The two-degree-of-freedom driving module is used to control the lifting height of the test bench along its axial direction and the rotation angle around its axial direction, thereby controlling the extension position and relative rotation angle of the marking module in the inner hole; The linear drive module is used to control the linear movement of the bracket along the slide slot, thereby controlling the pressure applied by the engraving module to the inner hole layer of the product to be tested.

5. The inner hole coating bonding strength detection device according to claim 4, characterized in that: The bracket is L-shaped, and its arm parallel to the central axis of the inner hole of the product to be tested is connected to the linear drive module, and the end of the arm perpendicular to the central axis of the inner hole of the product to be tested is equipped with a diamond indenter and faces the inner hole wall of the product to be tested; A slider is provided at one end of the bracket connected to the linear drive module, and a reinforcing rib is provided at the root of the slider, which is slidably connected to the slide groove on the support platform through the bottom slider; a driving rod is coaxially arranged at the bottom of the slider, and the driving rod is driven by the linear drive module to drive the bracket to perform linear motion.

6. The inner hole coating bonding strength detection device according to claim 5, characterized in that: The control assembly also includes a switch, a control panel, and an adjustment knob arranged on the controller, and the switch is used to control the opening or closing of the entire detection device; the control panel outputs control instructions to the two-degree-of-freedom drive module and the linear drive module to control the initial position of the diamond indenter, the moving distance and speed of the control slider, and the rotation speed or lifting speed of the test bench; The movement mode of the test bench can be switched by adjusting the knob. By turning the adjusting knob to a specified position, the movement mode of the test bench can be switched to rotate or lift.

7. The inner hole coating bonding strength detection device according to claim 6, characterized in that: The main body of the test bench is an annular plate, and a limiting boss is extended axially to one side from the outer edge of the annular plate, and a plurality of radial threaded holes are opened circumferentially on the circumferential surface of the limiting boss, and adjusting screws are installed in the radial threaded holes as positioning fixtures; the product to be tested coaxially installed on the annular plate of the test bench is radially limited by screwing the adjusting screw, and a rubber gasket is installed on the head of the adjusting screw to protect the product to be tested.

8. The inner hole coating bonding strength detection device according to claim 7, characterized in that: The signal transmission component includes a force sensor and an acoustic sensor installed on the bracket, and a force signal display screen and an acoustic signal display screen installed on the controller. The force sensor, the acoustic sensor and the controller are connected via a force sensor data line and an acoustic sensor data line respectively. The force signal obtained by the force sensor is displayed on the force signal display screen, and the force signal change during the test is displayed in real time on the force signal display screen to determine the bonding strength; The acoustic signal obtained by the acoustic sensor is displayed on the acoustic signal display screen, and the change of the acoustic signal during the test is displayed in real time on the acoustic signal display screen to assist in determining the bonding strength; It is connected to external analysis equipment and equipment for extracting test results through the data interface installed on the controller.

9. A method for detecting the bonding strength of an inner hole coating, implemented based on the inner hole coating bonding strength detection device according to any one of claims 1 to 8; characterized in that The specific steps are: Install the product to be tested on the test bench through the positioning fixture; Output control instructions according to the determined detection position, and the two-degree-of-freedom drive module controls the position of the test bench relative to the marking module, so that the marking module is relative to the initial position of the detection; Start the detection device, adjust the axial position and circumferential rotation angle of the test bench according to the set scoring trajectory, and adjust the feed distance of the scoring module according to the set pressure; The force sensor and the acoustic sensor send the collected test signals to the controller to obtain the change curves of the force signal and the acoustic signal to complete the detection.

10. A method for detecting bonding strength of inner hole coating according to claim 9, characterized in that: The signal receiving end of the controller is provided with an analog-to-digital signal converter, an amplifier, and a filter, which converts the received electrical signal into a digital signal and displays it on a display screen.

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