Push-type broach control method and system of push-pull force testing machine

Abstract

The invention discloses a push-type broach control method and system for a push-pull force testing machine. The method comprises the following steps: acquiring parameters of a to-be-tested component, the extension length of a push-type broach, the thickness of a bonding layer, the stress area of the push-type broach and the moving distance of a sliding block; performing thrust calculation according to the extension length, the thickness of the bonding layer and the weight of the component to obtain the maximum thrust and the maximum tensile force; comparing the maximum pushing force with the maximum pulling force to obtain the maximum pressure; calculating the critical push broach pressure according to the maximum pressure, the stress area and the moving distance to obtain the critical push broach pressure required for damaging the bonding layer; the critical cutter pushing pressure is compared with the maximum pressure, and when the critical cutter pushing pressure is larger than the maximum pressure, a control instruction for increasing the extending length is output; and when the critical cutter pushing pressure is smaller than the maximum pressure, a control instruction for reducing the extension length is output. According to the method, the push broach in the push-pull force testing machine can be accurately controlled.

Description

Technical Field

[0001] The present invention relates to the technical field of controlling test equipment, and particularly to a push knife control method and system for a push-pull testing machine. Background Art

[0002] At present, during the processes of soldering, transportation, and use of electronic components, they are often affected by external forces such as vibration, shock, and bending, generating mechanical stress, which may ultimately lead to the failure of solder joints or devices. A push-pull testing machine can be used to simulate the mechanical failure model of solder joints. By applying a constant-speed push-pull force to simulate the mechanical stress that electronic components may encounter during actual use, a dynamic mechanical testing method for evaluating the solder joint strength and device fixing strength is provided, revealing its reliability and durability, and providing key quality control data for the design and manufacture of electronic components.

[0003] In an existing technology, the test product is fixed on a fixture, and the computer drives a linear push-pull motor to drive the slide rail to slide horizontally, driving the push knife to slide. At the same time, the lead screw motor is driven to control the lead screw and the horizontal slider to move, driving the push knife to approach or move away from the test product, and the height of the push knife is adjusted by a lifting motor. The movement of the push knife to the test point on the test product is controlled by horizontal sliding, height adjustment, and distance adjustment. The linear push-pull motor drives the push knife to apply a thrust or a pull force to the test product, and the test data is obtained through a push-pull force sensor to complete the test process. However, for some test products with relatively small push-pull forces, excessive push knife pressure may damage the test product. When the test product is damaged, effective experimental data cannot be obtained.

[0004] In summary, in the existing technology, the push knife pressure cannot be accurately and effectively controlled, which easily leads to damage to the test product and the inability to obtain effective experimental data. Summary of the Invention

[0005] The present invention provides a push knife control method and system for a push-pull testing machine to solve the problems of inaccurate and ineffective control of the push knife pressure, easy damage to the test product, and inability to obtain effective experimental data.

[0006] In a first aspect, to solve the above technical problems, the present invention provides a push knife control method for a push-pull testing machine, including:

[0007] Obtain the parameters of the component to be tested, the extended length of the push knife, the thickness of the bonding layer, as well as the initial test thrust of the push knife, the force-bearing area of the push knife, and the moving distance of the slider; wherein, the parameters of the component to be tested include the component size parameters and the component weight;

[0008] Calculate the maximum thrust and the maximum pull force according to the extended length, the thickness of the bonding layer, and the component weight.

[0009] Determine the magnitude relationship between the maximum pulling force and the maximum pushing force, and obtain the maximum pressure of the initial test pushing force according to the magnitude relationship;

[0010] Perform critical push knife pressure calculation according to the initial test pushing force, the maximum pressure, the force-bearing area and the moving distance to obtain the critical push knife pressure; wherein, the critical push knife pressure is the critical push knife pressure required for the adhesive layer to fail when the push knife acts on the component with the maximum pressure as the initial test pushing force;

[0011] When the critical push knife pressure is greater than the maximum pressure, output a control command to increase the extended length;

[0012] When the critical push knife pressure is less than the maximum pressure, output a control command to decrease the extended length.

[0013] In an optional implementation manner, the calculating the maximum pushing force and the maximum pulling force according to the extended length, the adhesive layer thickness and the component weight includes:

[0014] Obtain a pre-configured first correction coefficient and a second correction coefficient;

[0015] Calculate the maximum pushing force and the maximum pulling force through the following adhesive area calculation formula:

[0016]

[0017] wherein, F p is the maximum pushing force, F t is the maximum pulling force, k 1 is the first correction coefficient, F t is the maximum pulling force, k 2 is the second correction coefficient, d is the adhesive layer thickness, m is the component weight, and a is the extended length.

[0018] In an optional implementation manner, the determining the magnitude relationship between the maximum pulling force and the maximum pushing force, and obtaining the maximum pressure of the initial test pushing force according to the magnitude relationship includes:

[0019] Compare the magnitudes of the maximum pulling force and the maximum pushing force;

[0020] If the maximum pulling force is greater than the maximum pushing force, use the maximum pushing force as the maximum pressure of the initial test pushing force;

[0021] If the maximum pulling force is less than the maximum pushing force, use the maximum pulling force as the maximum pressure of the initial test pushing force.

[0022] In an alternative embodiment, calculating the critical push - knife pressure based on the initial test thrust, the maximum pressure, the force - bearing area, and the moving distance to obtain the critical push - knife pressure includes:

[0023] Taking the maximum pressure as the initial test thrust, calculating the critical push - knife pressure based on the initial test thrust, the force - bearing area, and the moving distance to obtain the critical push - knife pressure;

[0024] Among them, the critical push - knife pressure is obtained through the following calculation formula:

[0025]

[0026] S = a×d

[0027] Among them, p max is the critical push - knife pressure, F max is the maximum pressure, S is the force - bearing area, a is the protrusion length, d is the adhesive layer thickness, s is the moving distance, k 3 is the third correction coefficient; the force - bearing area is the area of the actual contact and force - bearing region between the push - knife and the device under test.

[0028] In an alternative embodiment, the configuration process of the first correction coefficient and the second correction coefficient includes:

[0029] Performing initialization test parameter settings on the push - pull testing machine according to the device size parameters, the protrusion length, and the adhesive layer thickness, including the length correction coefficient and the width correction coefficient;

[0030] Performing multiple push - pull tests on the device under test, continuously adjusting the test parameter settings of the push - pull testing machine to break the adhesive layer, and obtaining several groups of test data of the critical push - knife pressure and the moving distance through multiple groups of tests under different conditions;

[0031] Performing data fitting on the several groups of test data by the least - squares method, and matching the fitted data with the calculation formula of the critical push - knife pressure and the adhesive area calculation formula to calculate and obtain the first correction coefficient and the second correction coefficient.

[0032] In an alternative embodiment, when the critical push - knife pressure is greater than the maximum pressure, outputting a control instruction to increase the protrusion length includes:

[0033] Analyzing according to the calculation formula of the critical push - knife pressure, it is obtained that the critical push - knife pressure has a negative correlation with the force - bearing area, that is, the critical push - knife pressure has a negative correlation with the protrusion length;

[0034] When the critical pushing force is greater than the maximum pressure, the maximum pressure is used as the current pushing force;

[0035] Substitute the current pushing force into the calculation formula of the critical pushing force to obtain the target extension length;

[0036] Output a control instruction to adjust the pushing tool to the target extension length to increase the extension length.

[0037] In an alternative embodiment, the continuous adjustment of the test parameter settings of the push-pull testing machine includes:

[0038] Use the push-pull testing machine to adjust the extension length of the pushing tool for each set of test parameters;

[0039] By calculation, make the extension length and the size of the component to be tested satisfy the following relationship:

[0040]

[0041] where m is the weight of the component, a is the extension length, b is the length correction coefficient, and c is the width correction coefficient.

[0042] In a second aspect, the present invention provides a pushing tool control system for a push-pull testing machine, including:

[0043] A data acquisition module that acquires parameters of the component to be tested, the extension length of the pushing tool, and the thickness of the adhesive layer, as well as the initial test thrust of the pushing tool, the force-bearing area of the pushing tool, and the moving distance of the slider; wherein, the parameters of the component to be tested include component size parameters and component weight;

[0044] A maximum thrust and maximum pressure calculation module that calculates the maximum thrust and maximum pull according to the extension length, the thickness of the adhesive layer, and the weight of the component;

[0045] A maximum pressure judgment module that judges the magnitude relationship between the maximum pull and the maximum thrust, and obtains the maximum pressure of the initial test thrust according to the magnitude relationship;

[0046] A critical pushing force calculation module that calculates the critical pushing force according to the initial test thrust, the maximum pressure, the force-bearing area, and the moving distance to obtain the critical pushing force; wherein, the critical pushing force is the critical pushing force required for the adhesive layer to break when the pushing tool acts on the component when the maximum pressure is used as the initial test thrust;

[0047] A pressure monitoring and control module is used to determine that when the critical pushing force is greater than the maximum pressure, a control instruction to increase the extending length is output; when the critical pushing force is less than the maximum pressure, a control instruction to decrease the extending length is output.

[0048] In a third aspect, the present invention further provides an electronic device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, the pushing blade control method of the push-pull testing machine described in any one of the above is implemented.

[0049] In a fourth aspect, the present invention further provides a computer-readable storage medium. The computer-readable storage medium includes a stored computer program. When the computer program runs, the device where the computer-readable storage medium is located is controlled to execute the pushing blade control method of the push-pull testing machine described in any one of the above.

[0050] Compared with the prior art, the present invention has the following beneficial effects:

[0051] The present invention provides a pushing blade control method for a push-pull testing machine. The method includes obtaining parameters of a component to be tested, the extending length of the pushing blade, the thickness of the bonding layer, as well as the force-bearing area of the pushing blade and the moving distance of the slider. Among them, the parameters of the component to be tested include component size parameters and component weight. The maximum thrust and maximum pull are calculated according to the extending length, the thickness of the bonding layer, and the component weight. The maximum pressure is obtained by comparing the magnitudes of the maximum thrust and maximum pull. The critical pushing force for the bonding layer to be damaged is calculated according to the maximum pressure, the force-bearing area, and the moving distance to obtain the critical pushing force required for the bonding layer to be damaged. According to the magnitude relationship between the critical pushing force and the maximum pressure, a pushing blade control instruction is judged and output.

[0052] By combining the analysis of the bonding area calculation formula and the critical pushing force calculation formula, the method calculates the critical pushing force required for the bonding layer to be damaged, compares it with the maximum pressure, and adjusts the product to be tested or the push-pull testing machine according to the comparison result, so that when the bonding layer is stressed, the critical pushing force is within a safe and effective test range, avoiding damage to the component due to excessive critical pushing force or failure to complete the performance test due to too small critical pushing force resulting in the bonding layer not being damaged. The method can achieve precise control of the pushing blade in the push-pull testing machine and obtain accurate and effective test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 is a schematic flow chart of a pushing blade control method for a push-pull testing machine provided by the first embodiment of the present invention;

[0054] Figure 2It is a schematic structural diagram of a push knife control system of a push-pull force testing machine provided by the second embodiment of the present invention. Detailed implementation manners

[0055] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0056] Refer to Figure 1 , the first embodiment of the present invention provides a push knife control method for a push-pull force testing machine, including the following steps:

[0057] S11, obtain the parameters of the component to be tested, the extended length of the push knife and the thickness of the bonding layer, as well as the initial test thrust of the push knife, the force-bearing area of the push knife and the moving distance of the slider; wherein, the parameters of the component to be tested include the component size parameters and the component weight;

[0058] S12, perform thrust calculation according to the extended length, the thickness of the bonding layer and the component weight to obtain the maximum thrust and the maximum pull force;

[0059] S13, judge the magnitude relationship between the maximum pull force and the maximum thrust, and obtain the maximum pressure of the initial test thrust according to the magnitude relationship;

[0060] S14, perform critical push knife pressure calculation according to the initial test thrust, the maximum pressure, the force-bearing area and the moving distance to obtain the critical push knife pressure; wherein, the critical push knife pressure is the critical push knife pressure required for the bonding layer to be damaged when the push knife acts on the component when the maximum pressure is used as the initial test thrust;

[0061] S15, when the critical push knife pressure is greater than the maximum pressure, output a control instruction to increase the extended length;

[0062] S16, when the critical push knife pressure is less than the maximum pressure, output a control instruction to decrease the extended length.

[0063] In step S11, it is necessary to obtain the parameters of the component to be tested, the extended length of the push knife and the thickness of the bonding layer, as well as the initial test thrust of the push knife, the force-bearing area of the push knife and the moving distance of the slider; wherein, the parameters of the component to be tested include the component size parameters and the component weight;

[0064] It should be noted that the parameters of the device under test include the device size parameters and the device weight, which are accurately measured by an electronic balance and a vernier caliper or a micrometer. All experimental adjustments and calculations are based on the measured parameters of the device under test. The push-pull testing machine drives the slide rail to slide horizontally through a linear push-pull motor, driving the push knife and the test product to slide; the extension length is the distance that the push knife extends from the initial position during the test, and this length will affect the test accuracy; the extension length is determined by the control software or mechanical components of the push-pull testing machine according to the device size parameters and multiple experimental adjustments, and is involved in the calculation formulas of the bonding area and the push knife pressure, helping to calculate the first correction coefficient and the second correction coefficient, which directly and indirectly affect the validity of the test results. The function of the bonding layer is to help fix the device on the substrate, and at the same time evaluate the bonding strength between the chip and the base or the attachment material and the integrity of the material process steps, by applying a specific force value and observing the detachment situation between the chip and the substrate; the thickness of the bonding layer is also an important index, which will affect the way the push knife applies force and the bonding strength of the device, and is measured by an ultrasonic thickness gauge or an X-ray thickness gauge, and then used to form the calculation formulas of the bonding area and the critical push knife pressure. The first correction coefficient is the correction coefficient for calculating the maximum tensile force, which is obtained by fitting experimental data and is used to adjust the theoretical model to match the actual test situation. The first correction coefficient reflects the relationship between the maximum tensile force applied by the push knife and the device size, mass, and bonding layer thickness under the given test conditions; it takes into account the physical characteristics of the device and the influence of the test environment, making the test results more accurate and reliable. The second correction coefficient is the same.

[0065] The initial test thrust is the thrust applied to the push knife set on the push-pull testing machine, which is input and controlled through the software interface of the push-pull testing machine. The size of the initial test thrust to be set needs to be calculated and statistically obtained in advance according to the parameters of the device under test. The force-bearing area is the area where the push knife contacts the device under test, and this area will affect the pressure distribution during the test, thus affecting the test results; the force-bearing area is obtained by calculating according to the extension length and the bonding layer thickness. The moving distance of the slider is the total distance that the slider on which the device under test is placed moves during the test, and this distance can reflect the degree to which the device is pushed off the substrate.

[0066] In step S12, it is necessary to calculate the maximum thrust and the maximum tensile force according to the extension length, the bonding layer thickness, and the device weight, including:

[0067] Obtain the pre-configured first correction coefficient and second correction coefficient;

[0068] Calculate the maximum thrust and the maximum tensile force through the following bonding area calculation formula:

[0069]

[0070] Among them, F p is the maximum thrust force, and F t is the maximum pulling force, k 1 is the first correction coefficient, and F t is the maximum pulling force, k 2 is the second correction coefficient, d is the adhesive layer thickness, m is the weight of the component, and a is the protruding length.

[0071] The calculation processes of the first correction coefficient and the second correction coefficient include: setting the test parameters for initializing the push-pull testing machine according to the component size parameters, the protruding length, and the adhesive layer thickness; conducting multiple push-pull tests on the component to be tested, continuously adjusting the test parameter settings of the push-pull testing machine to break the adhesive layer, and obtaining several groups of test data of the critical push tool pressure and the moving distance through multiple groups of tests under different conditions; performing data fitting on the several groups of test data by the least squares method, and matching the fitted data with the calculation formula of the critical push tool pressure and the calculation formula of the adhesive area to calculate and obtain the first correction coefficient and the second correction coefficient.

[0072] It should be noted that before the push-pull test, it is necessary to prepare test specimens: fix the tape on the product a1 to be tested, paste the product a2 to be tested on the tape, the tape is pasted at one end of the product a2 to be tested, and the length of the tape is not less than the diameter of the product a2 to be tested; use the length b of the product a1 to be tested and the diameter c of the product a2 to be tested as the parameters to be tested; this can simulate the product bonding situation in actual use and help ensure the practical relevance of the test results. The continuous adjustment of the test parameter settings of the push-pull testing machine includes: adjusting the protruding length of the push tool for each group of test parameters using the push-pull testing machine; making the protruding length and the size of the component to be tested satisfy the following relationship through calculation:

[0073]

[0074] where a is the protruding length of the push tool, b is the length b of the product a1 to be tested, and c is the diameter c of the product a2 to be tested; if the protruding length of the push tool and the size of the component to be tested do not satisfy the relationship, it is necessary to reset the protruding length of the push tool to satisfy the relationship. Use the length b of the product a1 to be tested as the length correction coefficient and the diameter c of the product a2 to be tested as the width correction coefficient. Continuously adjusting the test parameter settings of the push-pull testing machine can obtain the damage conditions of the adhesive layer under different conditions, and recording several groups of test data of the critical push tool pressure and the moving distance helps to calculate the first correction coefficient and the second correction coefficient subsequently.

[0075] According to the bonding layer failure test standard, set the upper limit standard of the critical push tool pressure, the upper limit standard of the slider moving speed, and the upper limit standard of the slider moving distance; adjust the critical push tool pressure to the upper limit standard of the critical push tool pressure, adjust the slider moving speed to the upper limit standard of the slider moving speed, and adjust the slider moving distance to the upper limit standard of the slider moving distance, and obtain ten groups of test data corresponding to the critical push tool pressure required for the bonding layer failure tested with each group of test parameters;

[0076] According to the ten groups of test data of each group of test parameters, respectively obtain ten groups of bonding area calculation formulas F p 、F t Coefficient k for the case of 1 、k 2 If the ten groups of coefficients k 1 、k 2 are similar, it meets the accuracy requirements, and data fitting is performed by the least squares method; if the ten groups of coefficients k 1 、k 2 are not similar, it does not meet the accuracy requirements, and calculate the average value of the ten groups of coefficients k 1 、k 2 After fitting, match the fitted data with the calculation formula of the critical push tool pressure and the bonding area calculation formula. If the fitted data is close to the average value of the coefficients k p 、F t for the ten groups of bonding area calculation formulas F 1 、k 2 then determine the calculated first correction coefficient and second correction coefficient; these coefficients are used to adjust the theoretical model to better conform to the actual test results, thereby improving the accuracy of the model.

[0077] Furthermore, the acquisition of the maximum thrust and the maximum tensile force is based on the self-performance of the push-pull force testing machine and the preset value of the artificial system; according to the bonding area calculation formula, the maximum thrust or the maximum tensile force can be calculated based on the protrusion length, the bonding layer thickness, and the component weight, or the first correction coefficient k 1 or the second correction coefficient k 2 can be obtained by inverse operation according to the maximum thrust or the maximum tensile force.

[0078] In step S13, judge the magnitude relationship between the maximum tensile force and the maximum thrust, and obtain the maximum pressure of the initial test thrust according to the magnitude relationship, including:

[0079] Compare the magnitudes of the maximum tensile force and the maximum thrust;

[0080] If the maximum tensile force is greater than the maximum thrust, take the maximum thrust as the maximum pressure of the initial test thrust;

[0081] If the maximum tensile force is less than the maximum thrust force, the maximum tensile force is taken as the maximum pressure of the initial test thrust force.

[0082] It should be noted that the judgment of the magnitude relationship is to determine whether to use the bonding area calculation tensile force model or the bonding area calculation thrust force model in the subsequent tests; choosing the smaller force is to ensure that the test will not cause excessive stress on the components, thus avoiding unnecessary damage to the components; in actual tests, if a larger force is used, it may cause damage to the components or excessive damage to the bonding layer, thus affecting the reliability of the test results. The maximum pressure of the initial test thrust force refers to taking the selected force as the maximum value of the initial test thrust force.

[0083] Furthermore, the maximum thrust force or maximum pressure is the maximum thrust force that the push-pull testing machine can apply without damaging the component to be tested or the bonding layer; this value is determined according to the expected bonding strength and material characteristics of the component during the design of the test.

[0084] In step S14, it is necessary to calculate the critical push knife pressure based on the initial test thrust force, the maximum pressure, the stress area, and the moving distance to obtain the critical push knife pressure; among them, the critical push knife pressure is the critical push knife pressure required for the bonding layer to be damaged when the push knife acts on the component when the maximum pressure is taken as the initial test thrust force, including:

[0085] Taking the maximum pressure as the initial test thrust force, calculate the critical push knife pressure based on the initial test thrust force, the stress area, and the moving distance to obtain the critical push knife pressure;

[0086] Among them, the critical push knife pressure is obtained through the following calculation formula:

[0087]

[0088] S = a×d

[0089] Among them, p max is the critical push knife pressure, F max is the maximum pressure, S is the stress area, a is the protrusion length, d is the bonding layer thickness, s is the moving distance, k 3 is the third correction coefficient; the stress area is the area of the region where the push knife actually contacts and is stressed with the component to be tested.

[0090] It should be noted that the critical pushing force of the cutter is the pressure exerted by the cutter on the bonding layer during the test. The critical pushing force required for the bonding layer to break is the minimum critical pushing force required to cause the bonding layer to break. The critical pushing force of the cutter is the pressure exerted by the cutter on the bonding layer during the test. According to the bonding area calculation formula and the critical pushing force calculation formula, the critical pushing force and the moving distance of the slider can be calculated; by analyzing the critical pushing force calculation formula, the push-pull testing machine can accurately determine the force-bearing area between the product to be tested and the cutter according to the maximum pulling force or maximum pushing force and the thickness of the bonding layer; at the same time, when the bonding layer is stressed, analyze the horizontal deviation between the product to be tested and the cutter, so as to ensure that the force on the cutter will not damage the product to be tested.

[0091] Among them, the specific steps for obtaining the horizontal deviation include: when the cutter pushes the product to be tested, if the bonding layer is damaged, the cutter directly pushes the product to be tested, and the product to be tested has a displacement; collect the laser point group at the time of displacement to make a displacement curve A, and perform differential processing on the displacement curve of the product to be tested to obtain the deflection angle θ of the product to be tested; in the laser point group, obtain the horizontal distance D between the laser point and the cutter, which refers to the vertical distance between the projection of the laser point on the horizontal plane and the cutter; construct a horizontal deviation parameter Y = tan(θ) according to the parameters obtained in the above steps; compare the calculated horizontal deviation parameter Y with the curve A obtained by fitting the laser point group to determine whether there is a horizontal deviation between the product to be tested and the cutter. If the cutter has a deviation in the horizontal direction, that is, the cutter is not completely perpendicular to the test product, this may cause the applied force to be uneven, thereby increasing the risk of damage to the test product.

[0092] In another implementation, the force-bearing area can be calculated by the following formula:

[0093] S = p × d

[0094] Where S is the force-bearing area, p is the critical pushing force of the cutter, and d is the thickness of the bonding layer; according to the above formula, the critical pushing force calculation model and the bonding area calculation formula, the third correction coefficient k in the critical pushing force calculation model can be calculated. 3 .

[0095] Furthermore, the construction process of the critical push - knife pressure calculation formula is as follows: According to the elastic deformation theory, when the bonded area is stressed, the area of the bonding layer under stress is the contact area between the component and the colloid. Under the condition of the same deformation amount of the component, the larger the stress area, the smaller the deformation of the component. That is, the stress area S of the push - knife = a×d. Therefore, through the applied force F of the component, the elastic deformation amount ΔS, the elastic stress area S, and the applied force f of the bonded area, a critical push - knife pressure calculation model can be constructed. The bonding degree s1 between the push - knife and the tape is affected by the elastic force and the bonded layer area. When controlling the critical push - knife pressure, due to the stress area S of the push - knife, when the bonded area is stressed and the bonded area calculation formula is used, the bonding failure point between the push - knife and the tape can be accurately controlled under the condition of a determined push - pull testing machine.

[0096] In step S15, when the critical push - knife pressure is greater than the maximum pressure, the control instruction to increase the extended length is output, including:

[0097] According to the analysis of the critical push - knife pressure calculation formula, it is obtained that the critical push - knife pressure has a negative correlation with the stress area, that is, the critical push - knife pressure has a negative correlation with the extended length;

[0098] When the critical push - knife pressure is greater than the maximum pressure, the maximum pressure is used as the current push - knife pressure;

[0099] Substitute the current push - knife pressure into the critical push - knife pressure calculation formula to obtain the target extended length;

[0100] Output the control instruction to adjust the push - knife to the target extended length to increase the extended length.

[0101] It should be noted that the maximum thrust or maximum pressure is the maximum thrust that the push - pull testing machine can apply without damaging the component under test or the bonded layer; this value is determined according to the expected bonding strength and material characteristics of the component during the design of the test. The critical push - knife pressure is the pressure applied by the push - knife to the bonded layer during the test. The critical push - knife pressure required for the bonded layer to fail is the minimum critical push - knife pressure required for the bonded layer to fail; if this pressure value is greater than the maximum thrust of the testing machine, it means that the testing machine cannot apply enough force to damage the bonded layer without damaging the component or the bonded layer. Through the simultaneous analysis of the bonded area calculation formula and the critical push - knife pressure calculation formula, it is obtained that the critical push - knife pressure is positively correlated with the extended length.

[0102] When the critical push - tool pressure is greater than the maximum pressure, it indicates that the push - tool cannot move, and the strength of the adhesive layer exceeds the design capacity of the testing machine; in this case, continuously increasing the thrust may cause damage to the components rather than the destruction of the adhesive layer. Therefore, to ensure the effective progress of the test without damaging the components, it is necessary to reduce the critical push - tool pressure; according to the positive correlation between the critical push - tool pressure and the extended length, control the output control instruction to increase the extended length; instruct the push - pull force testing machine to increase the extended length, that is, reduce the depth of contact between the push - tool and the component, so that the force - receiving area of the push - tool decreases, thereby reducing the pressure applied to the component.

[0103] In step S16, when the critical push - tool pressure is less than the maximum pressure, the control instruction to reduce the extended length is output, including:

[0104] When the critical push - tool pressure is less than the maximum pressure, take the maximum pressure as the current push - tool pressure;

[0105] Substitute the current push - tool pressure into the calculation formula of the critical push - tool pressure to obtain the target extended length;

[0106] Output the control instruction to adjust the push - tool to the target extended length to reduce the extended length.

[0107] It should be noted that it is also necessary to substitute the critical push - tool pressure into the critical push - tool pressure calculation model to calculate the moving distance of the slider of the push - pull force testing machine;

[0108] According to the simultaneous analysis of the adhesive area calculation formula and the critical push - tool pressure calculation formula, it is obtained that the critical push - tool pressure is positively correlated with the extended length, control the output control instruction to increase the extended length; instruct the push - pull force testing machine to increase the extended length, that is, reduce the depth of contact between the push - tool and the component, so that the force - receiving area of the push - tool decreases, thereby reducing the pressure applied to the component.

[0109] To facilitate the understanding of the present invention, some preferred embodiments of the present invention will be further described below.

[0110] The working process of the present invention is described below with a relatively common scenario as an example, and the steps are as follows:

[0111] Step 1. Obtain the parameters of the component to be tested, the extended length of the push - tool, and the thickness of the adhesive layer, as well as the initial test thrust of the push - tool, the force - receiving area of the push - tool, and the moving distance of the slider; among them, the parameters of the component to be tested include the component size parameters and the component weight; set the size of the component to be tested and the extended length of the push - tool. Specifically, in this embodiment, the component is 12 * 12 cm, and the extended length of the push - tool is 18 cm.

[0112] Step 2. Obtain the maximum tensile force, maximum thrust, and the thickness of the adhesive layer;

[0113] In this embodiment, the maximum tensile force is 20 kg, the maximum thrust force is 80 kg, and the thickness of the bonding layer is 5 cm.

[0114] Step 3. Calculate the maximum thrust force and the maximum tensile force through thrust force calculation according to the protruding length, the thickness of the bonding layer, and the weight of the component.

[0115] When the tensile force is the maximum tensile force, construct a calculation formula for the bonding area:

[0116]

[0117] where F t is the maximum tensile force, k 1 is the first correction coefficient, k 1 has a value of 0.0103, m is the weight of the component, a is the protruding length, and d is the thickness of the bonding layer;

[0118] When the thrust force is the maximum thrust force, construct a calculation formula for the bonding area:

[0119]

[0120] where F p is the maximum thrust force, k 2 is the second correction coefficient, k 2 has a value of 0.006, m is the weight of the component, a is the protruding length, and d is the thickness of the bonding layer;

[0121] Through experimental data analysis, it can be obtained that the stress area S received by the push knife at the maximum thrust force is S = p × d. Substitute into the calculation formula for the critical push knife pressure F = k 3 ·p·S·s, and it can be obtained that:

[0122] S = d*(k2 / d) / (k3*p), so k3 = k2 / d;

[0123] In this embodiment, k2 / d is 0.0065 / 5 = 0.013, and the value of k3 is 0.013.

[0124] In this embodiment, the mass m of the component to be measured has a value of 60 kg. Therefore, substituting the protruding length a of the push knife can obtain the correction coefficient, which is specifically 1.13.

[0125] In this embodiment, the obtained correction coefficient is 1.13. Therefore, the calculated calculation formula for the bonding area is 0.16*5*5*(1-(60 / 18)^2) = 1.29 kg;

[0126] Step 4. According to the maximum thrust force, calculate the critical push knife pressure required for the bonding layer to fail through the adhesion force calculation model, and compare it with the maximum thrust force.

[0127] Step 5. If the critical push - tool pressure required for the adhesive layer to break > the maximum thrust force, the push - tool cannot move, and the device under test is damaged.

[0128] In this embodiment, the critical push - tool pressure required for the adhesive layer to break is 60 / 1.3 = 45.4 kg, which is greater than the maximum thrust force of 80 kg. Therefore, the device under test is damaged.

[0129] Based on the actual requirement that the push - tool cannot move in Step 5, through experimental data analysis, a calculation method for the extended length of the push - tool is proposed.

[0130] Step 6. Set the size of the device under test and the extended length of the push - tool; specifically, in this embodiment, the device is 12 * 12 cm, and the extended length of the push - tool is 20 cm.

[0131] Step 7. Obtain the maximum thrust force and the thickness of the adhesive layer. The maximum thrust force is 80 kg, and the thickness of the adhesive layer is 5 cm.

[0132] Step 8. Substitute the model into the calculation formula for the critical push - tool pressure;

[0133] F = k 3 ·p·S·s. In the calculation formula for the critical push - tool pressure, solve for p, and then combine with the model S = d * p to solve for S;

[0134] In this embodiment, the values of k2 and k3 are the same as in Step 3, and the critical push - tool pressure p ≤ 1.05 N is obtained. The force - bearing area of the push - tool S = 5 * p ≤ 5.25.

[0135] In summary, the present invention discloses a push - tool control method for a push - pull testing machine, including: obtaining the parameters of the device under test, the extended length of the push - tool and the thickness of the adhesive layer, as well as the force - bearing area of the push - tool and the moving distance of the slider; wherein, the parameters of the device under test include the size parameters and the weight of the device; calculating the maximum thrust force and the maximum tensile force according to the extended length, the thickness of the adhesive layer and the weight of the device; comparing the magnitudes of the maximum thrust force and the maximum tensile force to obtain the maximum pressure; calculating the critical push - tool pressure according to the maximum pressure, the force - bearing area and the moving distance to obtain the critical push - tool pressure required for the adhesive layer to break; and judging and outputting a push - tool control instruction according to the magnitude relationship between the critical push - tool pressure and the maximum pressure.

[0136] The method combines the calculation formula of the bonding area and the calculation formula of the critical pushing force of the tool to analyze, calculates the critical pushing force required for the bonding layer to break, and compares it with the maximum pressure. According to the comparison result, the product to be tested or the push-pull testing machine is adjusted so that when the bonding layer is stressed, the critical pushing force is within a safe and effective test range, avoiding damage to components due to excessive critical pushing force, or failure to break the bonding layer due to too small critical pushing force and inability to complete the performance test. The method can achieve precise control of the pushing tool in the push-pull testing machine and obtain accurate and effective test data.

[0137] The present invention combines the calculation formula of the bonding area and the calculation formula of the critical pushing force of the tool to analyze, calculates the critical pushing force required for the bonding layer to break, and compares it with the maximum thrust. According to the comparison result, the product to be tested or the push-pull testing machine is adjusted so that when the bonding layer is stressed, the critical pushing force is within a safe and effective test range, avoiding damage to components due to excessive critical pushing force, or failure to break the bonding layer due to too small critical pushing force and inability to complete the performance test. The method can achieve precise control of the pushing tool in the push-pull testing machine and obtain accurate and effective test data.

[0138] Refer to Figure 2 , the second embodiment of the present invention provides a pushing tool control system for a push-pull testing machine, including:

[0139] A data acquisition module, which acquires the parameters of the component to be tested, the extended length of the pushing tool and the thickness of the bonding layer, as well as the initial test thrust of the pushing tool, the force-bearing area of the pushing tool and the moving distance of the slider; wherein, the parameters of the component to be tested include the component size parameters and the component weight;

[0140] A maximum thrust and maximum pressure calculation module, which calculates the maximum thrust and maximum pulling force according to the extended length, the thickness of the bonding layer and the weight of the component;

[0141] A maximum pressure judgment module, which judges the magnitude relationship between the maximum pulling force and the maximum thrust, and obtains the maximum pressure of the initial test thrust according to the magnitude relationship;

[0142] A critical pushing force calculation module, which calculates the critical pushing force according to the initial test thrust, the maximum pressure, the force-bearing area and the moving distance, and obtains the critical pushing force; wherein, the critical pushing force is the critical pushing force required for the bonding layer to break when the pushing tool acts on the component when the maximum pressure is used as the initial test thrust;

[0143] A pressure monitoring and control module is configured to output a control instruction to increase the extending length when the critical pushing force is greater than the maximum pressure; and output a control instruction to decrease the extending length when the critical pushing force is less than the maximum pressure.

[0144] It should be noted that the pushing blade control system of a push-pull testing machine provided in an embodiment of the present invention is used to execute all the process steps of the pushing blade control method of a push-pull testing machine in the above embodiment. Their working principles and beneficial effects correspond one by one, so they will not be elaborated here.

[0145] An embodiment of the present invention also provides an electronic device. The electronic device includes: a processor, a memory, and a computer program stored in the memory and executable on the processor, such as a critical pushing force calculation program. When the processor executes the computer program, it implements the steps in the above embodiments of the pushing blade control method of a push-pull testing machine, such as Figure 1 the step S11 shown. Alternatively, when the processor executes the computer program, it implements the functions of each module / unit in the above device embodiments, such as the critical pushing force calculation module.

[0146] Exemplarily, the computer program can be divided into one or more modules / units. The one or more modules / units are stored in the memory and executed by the processor to complete the present invention. The one or more modules / units can be a series of computer program instruction segments capable of performing specific functions, and these instruction segments are used to describe the execution process of the computer program in the electronic device.

[0147] The electronic device can be a computing device such as a desktop computer, a notebook, a palm computer, and a smart tablet. The electronic device may include, but is not limited to, a processor and a memory. Those skilled in the art can understand that the above components are only examples of the electronic device, and do not constitute a limitation to the electronic device. It may include more or fewer components than the above, or combine some components, or different components. For example, the electronic device may further include input / output devices, network access devices, a bus, etc.

[0148] The so-called processor may be a Central Processing Unit (CPU), or may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate Arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The processor is the control center of the electronic device, connecting various parts of the entire electronic device through various interfaces and circuits.

[0149] The memory can be used to store the computer programs and / or modules. By running or executing the computer programs and / or modules stored in the memory, and by invoking the data stored in the memory, the processor realizes various functions of the electronic device. The memory mainly includes a program storage area and a data storage area. Among them, the program storage area can store an operating system, application programs required for at least one function (such as a sound playback function, an image playback function, etc.); the data storage area can store data created according to the use of the mobile phone (such as audio data, phone book, etc.). In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as a hard disk, memory, plug-in hard disk, Smart Media Card (SMC), Secure Digital (SD) card, Flash Card, at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage devices.

[0150] Among them, if the modules / units integrated in the electronic device are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, to implement all or part of the processes in the above-described embodiment methods of the present invention, it can also be completed by a computer program instructing relevant hardware. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above-described various method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file, or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disc, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc. It should be noted that the content included in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0151] It should be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, in the attached drawings of the device embodiments provided by the present invention, the connection relationship between the modules indicates that they have a communication connection, which can be specifically implemented as one or more communication buses or signal lines. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0152] The specific embodiments described above have further elaborated on the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. It is particularly pointed out that for those skilled in the art, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A push knife control method and system for a push-pull force testing machine, characterized in that: Performed by the control system, including: Obtaining the parameters of the component to be tested, the extension length of the push knife and the thickness of the adhesive layer, as well as the initial test thrust of the push knife, the force-bearing area of ​​the push knife and the moving distance of the slider; wherein the parameters of the component to be tested include the size parameters of the component and the weight of the component; Calculate the thrust according to the extension length, the thickness of the adhesive layer and the weight of the component to obtain the maximum thrust and the maximum pull; Determine the magnitude relationship between the maximum pulling force and the maximum thrust, and obtain the maximum pressure of the initial test thrust according to the magnitude relationship; The critical push knife pressure is calculated according to the initial test thrust, the maximum pressure, the force-bearing area and the moving distance to obtain the critical push knife pressure; wherein the critical push knife pressure is the critical push knife pressure required for the adhesive layer to be destroyed when the push knife acts on the component when the maximum pressure is used as the initial test thrust; When the critical push blade pressure is greater than the maximum pressure, a control instruction to increase the extension length is output; When the critical push blade pressure is less than the maximum pressure, a control instruction to reduce the extension length is output.

2. The push blade control method and system of the push-pull force testing machine according to claim 1, characterized in that: The step of calculating the thrust according to the extension length, the thickness of the adhesive layer and the weight of the components to obtain the maximum thrust and the maximum pull includes: Obtaining a preconfigured first correction coefficient and a second correction coefficient; The maximum thrust and the maximum pull are calculated by the following bonding area calculation formula: Among them, F p is the maximum thrust, F t is the maximum tension, k1 is the first correction coefficient, F t is the maximum tensile force, k2 is the second correction factor, d is the thickness of the adhesive layer, m is the weight of the component, and a is the protruding length.

3. The push blade control method and system of the push-pull force testing machine according to claim 2, characterized in that: The determining the magnitude relationship between the maximum pulling force and the maximum thrust, and obtaining the maximum pressure of the initial test thrust according to the magnitude relationship, comprises: comparing the maximum pulling force and the maximum pushing force; If the maximum pulling force is greater than the maximum thrust, the maximum thrust is used as the maximum pressure of the initial test thrust; If the maximum pulling force is less than the maximum thrust, the maximum pulling force is used as the maximum pressure of the initial test thrust.

4. The push blade control method and system of the push-pull force testing machine according to claim 3, characterized in that: The calculating of the critical push-blade pressure according to the initial test thrust, the maximum pressure, the force-bearing area and the moving distance to obtain the critical push-blade pressure includes: The maximum pressure is used as the initial test thrust, and a critical push-knife pressure is calculated according to the initial test thrust, the force-bearing area and the moving distance to obtain the critical push-knife pressure; The critical push blade pressure is obtained by the following calculation formula: S=a×d Among them, p max is the critical push blade pressure, F max is the maximum pressure, S is the force-bearing area, a is the extension length, d is the thickness of the adhesive layer, s is the moving distance, and k3 is the third correction coefficient; the force-bearing area is the area of ​​the area where the push knife and the component to be tested are actually in contact and subjected to force.

5. The push blade control method and system of the push-pull force testing machine according to claim 4, characterized in that: The configuration process of the first correction coefficient and the second correction coefficient includes: Initializing the test parameter settings of the push-pull force testing machine according to the component size parameters, the extension length and the adhesive layer thickness, including a length correction factor and a width correction factor; Perform multiple push-pull force tests on the components to be tested, and continuously adjust the test parameter settings of the push-pull force tester to damage the bonding layer. Through multiple sets of tests under different conditions, several sets of test data on critical push knife pressure and moving distance are obtained; The plurality of test data sets are fitted by least square method, and the fitted data are matched with the calculation formula of critical push knife pressure and the calculation formula of bonding area to obtain the first correction coefficient and the second correction coefficient.

6. The push blade control method and system of the push-pull force testing machine according to claim 4, characterized in that: When the critical push blade pressure is greater than the maximum pressure, a control instruction to increase the extension length is output, including: According to the calculation formula of the critical push blade pressure, it is found that the critical push blade pressure is negatively correlated with the force-bearing area, that is, the critical push blade pressure is negatively correlated with the extension length; When the critical push blade pressure is greater than the maximum pressure, the maximum pressure is used as the current push blade pressure; Substituting the current push blade pressure into the calculation formula of the critical push blade pressure to obtain the target extension length; A control instruction is outputted to adjust the push knife to a target extension length, so as to increase the extension length.

7. The push blade control method and system of the push-pull force testing machine according to claim 5, characterized in that: The continuously adjusting the test parameter settings of the push-pull force testing machine includes: Use a push-pull force testing machine to adjust the extension length of the push knife for each set of test parameters; The extension length and the size of the component to be tested are calculated to satisfy the following relationship: Where m is the weight of the component, a is the protruding length, b is the length correction factor, and c is the width correction factor.

8. A push-knife control system for a push-pull force testing machine, characterized in that: include: A data acquisition module is used to acquire the parameters of the components to be tested, the extension length of the push knife and the thickness of the adhesive layer, as well as the initial test thrust of the push knife, the force-bearing area of ​​the push knife and the moving distance of the slider; wherein the parameters of the components to be tested include the size parameters of the components and the weight of the components; A maximum thrust and maximum pressure calculation module, which performs thrust calculation according to the extension length, the thickness of the adhesive layer and the weight of the components to obtain the maximum thrust and the maximum pulling force; A maximum pressure determination module is used to determine the magnitude relationship between the maximum pulling force and the maximum thrust, and obtain the maximum pressure of the initial test thrust according to the magnitude relationship; A critical push knife pressure calculation module is used to calculate the critical push knife pressure according to the initial test thrust, the maximum pressure, the force-bearing area and the moving distance to obtain the critical push knife pressure; wherein the critical push knife pressure is the critical push knife pressure required for the adhesive layer to be destroyed when the push knife acts on the component when the maximum pressure is used as the initial test thrust; The pressure monitoring and control module is used to determine that when the critical push blade pressure is greater than the maximum pressure, a control instruction to increase the extension length is output; when the critical push blade pressure is less than the maximum pressure, a control instruction to reduce the extension length is output.

9. An electronic device, characterized in that: It comprises a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, and when the processor executes the computer program, it implements the push knife control method and system of the push-pull force testing machine as described in any one of claims 1 to 8.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the push knife control method and system of the push-pull force testing machine as described in any one of claims 1 to 8.

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