Method and System for Determining Articulated Pressing Force

Abstract

The present invention discloses a method and system for determining the articulated pressing force. The method includes the following steps: Step S1, obtaining the pressing stress-strain data during the process of articulately pressing the casing, and the structural parameters of the articulation and the casing; Step S2, obtaining the articulated pressing force according to the obtained pressing stress-strain data, and the structural parameters of the articulation and the casing. The method for determining the articulated pressing force provided by this application indirectly obtains the articulated pressing force based on the pressing stress-strain data during the process of articulately pressing the casing and the structural data of the articulation and the casing, effectively reducing the number of debugging times for articulated press-fitting and ensuring the actual press-fitting quality of the articulation.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive articulated press - fitting detection, and particularly to a method and system for determining the articulated press - out force. Background Art

[0002] Most moving parts (such as torsion beams, triangular arms, etc.) on automotive suspension systems are connected by elastic elements (hinges), which can not only ensure smooth relative movement between metal parts but also effectively reduce the friction noise between metal parts. However, in the design process of torsion beams, triangular arms, and various swing arms, in order to ensure the consistency between product performance and actual use, the required press - out force of the hinge is generally given during product design. During the actual production process of these parts, only the press - in force can be monitored. To obtain the actual press - out force, the pressed - in hinge needs to be pressed out of the sleeve again. Since the hinge may yield after being pressed out and cannot be used again, it is particularly important to indirectly obtain the press - out force of the hinge. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above - mentioned deficiencies in the background art and provide a method and system for determining the articulated press - out force.

[0004] In a first aspect, a method for determining the articulated press - out force includes the following steps:

[0005] Step S1: Obtain the press - in stress - strain data during the process of the hinge being pressed into the sleeve, and the structural parameters of the hinge and the sleeve;

[0006] Step S2: Obtain the articulated press - out force according to the obtained press - in stress - strain data, and the structural parameters of the hinge and the sleeve.

[0007] According to the first aspect, in the first possible implementation manner of the first aspect, step S2 specifically includes the following steps:

[0008] Step S21: Obtain the interference amount ΔD between the hinge and the sleeve;

[0009] Step S22: Obtain the plastic strain value ε of the contact point between the hinge and the sleeve wall at the i - th moment i ;

[0010] Step S23: Obtain the outer diameter D0 of the hinge, the elastic modulus E of the sleeve material, and the friction coefficient f2 between the hinge and the sleeve;

[0011] Step S24: Obtain the articulated press - out force according to the obtained ΔD, ε i 、D0, E, and f2.

[0012] According to the first possible implementation manner of the first aspect, in the second possible implementation manner of the first aspect, step S21 specifically includes the following steps:

[0013] Step S211: Obtain the vertical force F exerted by the pressing device on the hinge joint i压入 ;

[0014] Step S212: Obtain the displacement of the device descending at the i-th moment and the angle between the pressing force and the axis of the hinge joint when pressing the hinge joint at the i-th moment;

[0015] Step S213: Obtain the outer diameter D0 of the hinge joint and the elastic modulus E of the casing material;

[0016] Step S214: According to the obtained F i压入 , L i设备 , D0 and E, obtain the interference amount ΔD between the hinge joint and the casing.

[0017] According to the first possible implementation manner of the first aspect, in the second possible implementation manner of the first aspect, the step S22 specifically includes the following steps:

[0018] Step S221: Obtain the vertical force F exerted by the pressing device on the hinge joint i压入 ;

[0019] Step S222: Obtain the total length X of the hinge joint that has been pressed in at the i-th moment i ;

[0020] Step S223: Obtain the first fitting constant A and the second fitting constant m;

[0021] Step S224: Obtain the initial yield stress σ0 of the casing;

[0022] Step S225: According to F i压入 , X i , A, m and σ0, obtain the plastic strain value ε at the contact point between the hinge joint and the casing wall at the i-th moment i .

[0023] According to the third possible implementation manner of the first aspect, in the fourth possible implementation manner of the first aspect, the step S223 specifically includes the following steps:

[0024] Step S2231: Obtain the vertical force F exerted by the pressing device on the hinge joint at the i-th moment during the process of pressing the hinge joint into the casing i压入 ;

[0025] Step S2232: Obtain the total length X of the hinge joint that has been pressed in at the i-th moment i ;

[0026] Step S2233: Obtain the angle θ between the pressing force and the axis of the hinge joint when pressing the hinge joint at the i-th moment i ;

[0027] Step S2234: Obtain the stress value σ at the contact point between the hinge and the casing wall at the i-th moment i ;

[0028] Step S2235: According to X i , θ i , σ i and the stress-strain equation, fit the stress-strain curve;

[0029] Step S2236: Obtain the first fitting constant A and the second fitting constant m by fitting the stress-strain curve.

[0030] In a second aspect, the present application provides a hinge pressing force determination system, including:

[0031] A pressing stress-strain data and parameter acquisition module, configured to acquire the pressing stress-strain data during the process of pressing the hinge into the casing, and the structural parameters of the hinge and the casing;

[0032] A hinge pressing force acquisition module, communicatively connected to the pressing stress-strain data and parameter acquisition module, and configured to acquire the hinge pressing force according to the acquired pressing stress-strain data, and the structural parameters of the hinge and the casing.

[0033] According to the second aspect, in the first possible implementation manner of the second aspect, the hinge pressing force acquisition module includes:

[0034] An interference amount acquisition sub-module, configured to acquire the interference amount ΔD between the hinge and the casing;

[0035] A plastic strain value acquisition sub-module, configured to acquire the plastic strain value ε at the contact point between the hinge and the casing wall at the i-th moment i ;

[0036] A first parameter acquisition sub-module, configured to acquire the outer diameter D0 of the hinge, the elastic modulus E of the casing material, and the friction coefficient f2 between the hinge and the casing;

[0037] A hinge pressing force acquisition sub-module, communicatively connected to the interference amount acquisition sub-module, the plastic strain value acquisition sub-module, and the first parameter acquisition sub-module, and configured to acquire the hinge pressing force according to the acquired ΔD, ε i , D0, E, and f2.

[0038] According to the first possible implementation manner of the second aspect, in the second possible implementation manner of the second aspect, the interference amount acquisition sub-module includes:

[0039] A vertical force acquisition unit, configured to acquire the vertical force F exerted by the pressing device on the hinge i压入 ;

[0040] A descending displacement acquisition unit, configured to acquire the displacement of the device descending at the i-th moment;

[0041] A second parameter acquisition unit, configured to acquire the hinge outer diameter D0 and the elastic modulus E of the casing material;

[0042] An interference amount acquisition unit, communicatively connected to the vertical force acquisition unit, the descent displacement acquisition unit, and the second parameter acquisition unit, configured to acquire the interference amount ΔD between the hinge and the casing according to the acquired F i压入 , L i设备 , D0, and E.

[0043] According to a second aspect, in a third possible implementation manner of the second aspect, the plastic strain value acquisition sub-module includes:

[0044] A vertical force acquisition unit, configured to acquire the vertical force F exerted by the pressing device on the hinge i压入 ;

[0045] A hinge pressing length acquisition unit, configured to acquire the total length X of the hinge pressed in at the i-th moment i ;

[0046] A fitting constant acquisition unit, configured to acquire a first fitting constant A and a second fitting constant m;

[0047] A yield stress initial value acquisition unit, configured to acquire the initial yield stress σ0 of the casing;

[0048] A plastic strain value acquisition unit, communicatively connected to the vertical force acquisition unit, the fitting constant acquisition unit, and the yield stress initial value acquisition unit, configured to acquire the plastic strain value ε at the contact point between the hinge and the casing wall at the i-th moment according to F i压入 , X i , A, m, and σ0 i .

[0049] According to the third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the fitting constant acquisition unit includes:

[0050] A vertical force acquisition subunit, configured to acquire the vertical force F exerted by the pressing device on the hinge at the i-th moment during the process of pressing the hinge into the casing i压入 ;

[0051] A hinge pressing length acquisition subunit, configured to acquire the total length X of the hinge pressed in at the i-th moment i ;

[0052] A pressing angle acquisition subunit, configured to acquire the angle θ between the pressing force and the axis of the hinge when pressing the hinge at the i-th moment i ;

[0053] A stress value acquisition subunit, configured to acquire the stress value σ at the contact point between the hinge and the casing wall at the i-th momenti ;

[0054] The stress-strain curve fitting subunit, which is communicatively connected to the vertical force acquisition subunit, the articulated press-in length acquisition subunit, the press-in angle acquisition subunit, and the stress value acquisition subunit, is configured to fit the stress-strain curve according to X i , θ i , σ i and the stress-strain equation;

[0055] The fitting constant acquisition subunit, which is communicatively connected to the stress-strain curve fitting subunit, is configured to obtain a first fitting constant A and a second fitting constant m by fitting according to the stress-strain curve.

[0056] Compared with the prior art, the advantages of the present invention are as follows:

[0057] The articulated press-out force determination method provided by the present application indirectly obtains the articulated press-out force according to the press-in stress-strain data during the articulated press-in of the casing and the structural data of the hinge and the casing, effectively reducing the number of debugging times for articulated press-fitting and ensuring the actual press-fitting quality of the hinge. Description of the Drawings

[0058] Figure 1 is a schematic diagram of articulated press-in;

[0059] Figure 2 is a schematic diagram of articulated press-out;

[0060] Figure 3 is a method flow chart of the articulated press-out example determination method provided by the present application;

[0061] Figure 4 is another method flow chart of the articulated press-out example determination method provided by the present application;

[0062] Figure 5 is a functional module block diagram of the articulated press-out example determination system provided by the present application;

[0063] Figure 6 is another functional module block diagram of the articulated press-out example determination system provided by the present application. Detailed Embodiments

[0064] Now, specific embodiments of the present invention will be described in detail. Examples of the present invention are illustrated in the accompanying drawings. Although the present invention will be described in conjunction with specific embodiments, it will be understood that it is not intended to limit the present invention to the described embodiments. On the contrary, it is intended to cover modifications, variations, and equivalents included within the spirit and scope of the present invention as defined by the appended claims. It should be noted that the method steps described herein can be implemented by any functional block or functional arrangement, and any functional block or functional arrangement can be implemented as a physical entity or a logical entity, or a combination of both.

[0065] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0066] Note: The examples to be introduced next are only specific examples and do not limit that the embodiments of the present invention must be the following specific steps, numerical values, conditions, data, sequences, etc. Those skilled in the art can use the concept of the present invention by reading this specification to construct more embodiments not mentioned in this specification.

[0067] Elastic elements used for connecting most moving parts on an automotive suspension system, such as torsion beams, triangular arms, etc., need to be hinged. Generally, the required hinge pressing force is given in the product design. However, during the actual production process of these parts, only the pressing force can be monitored. To obtain the actual pressing force, the assembled hinge needs to be pressed out again. However, during the hinge pressing process, the hinge may undergo yield deformation and cannot be pressed out again. Therefore, the pressing force cannot be directly obtained by pressing out.

[0068] The schematic diagrams of the pressing-in and pressing-out of the hinge are respectively as Figure 1 and Figure 2 shown.

[0069] In this application, the pressing-in of the hinge refers to pressing the hinge into the sleeve through a pressing device, and the pressing-out of the hinge refers to pressing the hinge out of the sleeve through a pressing device.

[0070] It should be noted that for the pressing diagrams provided in this application, Figure 1 and Figure 2 the directions of the sleeves are opposite.

[0071] In view of this, this application provides a method for determining the hinge pressing force to indirectly obtain the hinge pressing force, effectively solving the technical problem in the prior art that due to possible yield during the hinge pressing process, the pressing force cannot be obtained by directly pressing out.

[0072] In this application, the hinge specifically refers to a hinge part or a part to be pressed or specifically a bushing, and can also refer to a hinge connection method.

[0073] Please refer to Figure 3 , a method for determining the hinge pressing force, comprising the following steps:

[0074] Step S1, obtain the press-in stress-strain data during the process of pressing the hinge into the sleeve, and the structural parameters of the hinge and the sleeve;

[0075] Step S2, obtain the hinge pressing force according to the obtained press-in stress-strain data, and the structural parameters of the hinge and the sleeve.

[0076] A method for determining the articulation press - in force provided by this application monitors and obtains the press - in stress - strain data during the articulation press - in process and the structural parameters of the articulation and the casing, and indirectly calculates and obtains the articulation press - in force without considering whether there are situations such as yielding, deformation, and damage during the articulation press - in process, effectively reducing the number of articulation press - fitting debuggings and ensuring the press - fitting quality of the articulation.

[0077] This invention mainly solves the following technical problems: First, how to indirectly obtain the calculation of the articulation press - in force; Second, how to dynamically obtain the press - fitting angle of the articulation, that is, the angle between the press - in force and the axis of the articulation when pressing in the articulation at the i - th moment.

[0078] As described above, the structural parameters of the articulation include the articulation height L0 and the articulation outer diameter D0, and the structural parameters of the casing include the yield stress value σ0 of the casing and the elastic modulus E of the articulation or the casing.

[0079] 1.1. The articulation press - in force is achieved through the following technical content:

[0080] During the actual press - fitting process of the articulation, since the guiding mechanism of the press - fitting tooling directly contacts the articulation rubber, after the press - fitting is completed, the articulation rubber shrinks, resulting in the articulation rubber tightly wrapping the guiding mechanism in the press - fitting tooling, making it impossible to unload the articulation from the press - fitting tooling. Generally, the size of the guiding mechanism of the press - fitting tooling should have a clearance fit with the articulation rubber, and it is easy to have a deviation when pressing in the articulation. After the deviation, there is a certain deviation in the force when the articulation is pressed in and pressed out. Therefore, the articulation press - in force is calculated by combining the press - in force and the equipment motion parameters. When starting to press in the articulation, affected by the guiding mechanism, it is not pressed in vertically when pressing in the articulation, and there is a certain press - in angle. As Figure 1 shown, at this time, the frictional force between the upper surface of the articulation and the press - fitting equipment and the contact reaction force between the articulation and the casing wall form a lever. Using the lever principle, the contact reaction force between the articulation and the casing wall can be directly calculated. When starting to press in, the reaction - force arm between the articulation and the casing wall is small, while the force is large. This large force may cause the casing to yield. According to the stress - strain data of the casing material, the corresponding stress - strain relationship formula (such as formula 1) can be fitted. When the contact reaction force is known, the corresponding plastic strain of the casing can be calculated according to the stress - strain relationship formula. At this time, the originally designed interference amount (the fit between the articulation and the casing) will decrease, and the articulation will move downward, resulting in a decrease in the press - fitting angle. As the press - in continues, the press - fitting angle continues to decrease until it finally decreases to 0, and the articulation is parallel to the casing. During this process, the casing plays a guiding role. When the articulation is pressed out, the casing is in full contact with the articulation, and the pressing - out direction is parallel to the casing. There is no press - fitting angle during the pressing - out process (the casing plays a good guiding role during this process). According to the above description and the geometric relationships between the various components during the movement process, the following relationship formula can be obtained.

[0081]

[0082] Where: F i压入 is the vertical force exerted by the pressing device on the hinge, unit: N; f1 is the friction coefficient between the hinge and the pressing device; L0 is the hinge height, unit: mm; x i is the total length of the hinge that has been pressed in at the i-th moment, unit: mm; F i反 is the reaction force from the casing wall, unit: N; σ i is the stress value at the contact point between the hinge and the casing wall at the i-th moment, unit: MPa; θ i is the clamping angle between the pressing force and the axis of the hinge when pressing in the hinge at the i-th moment, unit: rad; ε i is the plastic strain value at the contact point between the hinge and the casing wall at the i-th moment; σ0 is the yield stress value of the casing, unit: MPa; A and m are both constants, which can be obtained by fitting the stress-strain curve; F 压出 is the force when the hinge is pressed out, unit: N; π is a constant, usually taken as 3.14; D0 is the outer diameter of the hinge, unit: mm; ΔD is the interference amount (design value) between the hinge and the casing, unit: mm; E is the elastic modulus of the material, unit: MPa; f2 is the friction coefficient between the hinge and the casing; L i设备 is the displacement of the device descending at the i-th moment, unit: mm.

[0083] In the formula, F i压入 , L i设备 are parameters during the movement of the device and can be directly read from the device; f1 and f2 are friction coefficients, which are constants, and A and m are both constants, which can be obtained by fitting the stress-strain curve; x i , ε i , θ i and F 压出 are unknown variables, and F 压出 can be calculated according to formula (1).

[0084] 1.2. The acquisition of the hinge pressing angle is achieved through the following technical solutions:

[0085] Since the displacement of the device descending can be obtained in real time, theoretically, the displacement of the device pressing in is the same as the displacement of the hinge pressing in. At this time, the pressing force is all used to overcome the frictional force between the hinge and the casing wall. The theoretical frictional force between the hinge and the casing wall can be calculated based on the displacement of the device descending, the diameter of the casing, and the interference amount. When these two forces are inconsistent, there will be a pressing angle. The cosine value of the device pressing force is the same as the frictional force between the hinge and the casing wall. According to this relationship, the pressing angle at each moment can be calculated.

[0086] Based on the kinematic relationship during articulated press-fitting, the material constitutive model, and the principle of mechanical leverage, this application gives the calculation expression for the articulated press-out force, as shown in Equation 1. The press-out force of the articulation can be calculated without pressing out the articulation; and by monitoring the press-fitting angle, the press-in force is adjusted in real time to ensure the actual press-fitting quality of the articulation. This method not only reduces the scrap rate and the number of debugging times but also achieves the purpose of improving product performance, providing a new solution for calculating the press-out force of press-fitting parts.

[0087] In one embodiment, please refer to Figure 4 , the step S2 specifically includes the following steps:

[0088] Step S21: Obtain the interference amount ΔD between the articulation and the sleeve;

[0089] Step S22: Obtain the plastic strain value ε of the contact point between the articulation and the sleeve wall at the i-th moment i ;

[0090] Step S23: Obtain the outer diameter D0 of the articulation, the elastic modulus E of the sleeve material, and the friction coefficient f2 between the articulation and the sleeve;

[0091] Step S24: According to the following formula, calculate and obtain the articulated press-out force F by using the obtained ΔD, ε i , D0, E, and f2 压出 :

[0092]

[0093] Among them, the interference amount ΔD between the articulation and the sleeve is the difference between the diameter of the bushing or the articulation and the diameter of the sleeve. Specifically, when the initial diameter of the bushing is 51 cm and the diameter of the sleeve is 50 cm, ΔD is 1 cm. When the bushing is pressed into the sleeve, the diameter of the sleeve gradually increases under the action of elasticity, and ΔD gradually becomes smaller.

[0094] In one embodiment, the step S21 specifically includes the following steps:

[0095] Step S211: Obtain the vertical force F acting on the articulation by the press-fitting device i压入 ;

[0096] Step S212: Obtain the displacement L of the device descending at the i-th moment i设备 and the angle θ between the press-in force and the axis of the articulation when pressing in the articulation at the i-th moment i ;

[0097] Step S213: Obtain the outer diameter D0 of the articulation and the elastic modulus E of the bushing material;

[0098] Step S214: Use the obtained F i压入 , L i设备, D0 and E obtain the interference amount ΔD between the hinge and the sleeve according to the following formula:

[0099]

[0100] In one embodiment, the step S22 specifically includes the following steps:

[0101] Step S221: Obtain the vertical force F exerted by the pressing device on the hinge i压入 ;

[0102] Step S222: Obtain the total length X of the hinge that has been pressed in at the i-th moment i ;

[0103] Step S223: Obtain the first fitting constant A and the second fitting constant m;

[0104] Step S224: Obtain the initial yield stress σ0 of the sleeve;

[0105] Step S225: Numerically transform the obtained F i压入 , X i , A, m and σ0 according to the following formula and calculate to obtain the plastic strain value ε at the contact point between the hinge and the sleeve wall at the i-th moment i :

[0106]

[0107] In the formula, f1 is the friction coefficient between the hinge and the pressing device.

[0108] As described above, the contact point is Figure 1 the fulcrum in

[0109] In one embodiment, the step S223 specifically includes the following steps:

[0110] Step S2231: Obtain the vertical force F exerted by the pressing device on the hinge at the i-th moment during the process of pressing the hinge into the sleeve i压入 ;

[0111] Step S2232: Obtain the total length X of the hinge that has been pressed in at the i-th moment i ;

[0112] Step S2233: Obtain the angle θ between the pressing force and the axis of the hinge at the i-th moment when pressing the hinge i ;

[0113] Step S2234: Obtain the stress value σ at the contact point between the hinge and the sleeve wall at the i-th moment i ;

[0114] Step S2235: According to X i , θ i , σi Fitting the stress-strain curve with the stress-strain equation:

[0115]

[0116] Step S2236: Obtain the first fitting constant A and the second fitting constant m according to the fitted stress-strain curve.

[0117] Where i is the current moment, and the time when the hinge is fully pressed into the sleeve is set as n, then 0 ≤ i ≤ n.

[0118] In one embodiment, in step S2233, the outer diameter D0 of the hinge, the vertical force F exerted by the pressing device on the hinge i压入 , the displacement L of the device descending at the i-th moment i设备 , the elastic modulus E of the sleeve material, and the interference amount ΔD between the hinge and the sleeve are numerically transformed according to the following formula to calculate and obtain the angle θ between the pressing force and the axis of the hinge when the hinge is pressed at the i-th moment i :

[0119]

[0120] As described above, step S2234 can be implemented by setting a stress sensing device at the press-fitting fulcrum of the sleeve and the hinge to obtain the stress value at the contact point between the hinge and the sleeve wall, or the fulcrum, at the i-th moment.

[0121] In a more specific embodiment, record F i压入 , X i , σ i during the entire press-fitting process of the hinge from the start of press-fitting to being fully pressed into the sleeve, and fit the stress-strain curve according to the stress-strain equation to obtain the first fitting constant A and the second fitting constant m.

[0122] Based on the same inventive concept, please refer to Figure 5 , the present application provides a hinge pressing force determination system, including:

[0123] A press-in stress-strain data and parameter acquisition module 100, configured to acquire press-in stress-strain data during the process of pressing the hinge into the sleeve, and structural parameters of the hinge and the sleeve;

[0124] A hinge pressing force acquisition module 200, communicatively connected to the press-in stress-strain data and parameter acquisition module, and configured to acquire the hinge pressing force according to the acquired press-in stress-strain data, and structural parameters of the hinge and the sleeve.

[0125] In one embodiment, please refer to Figure 6 , the hinge pressing force acquisition module includes:

[0126] The interference amount acquisition sub-module 210 is used to acquire the interference amount ΔD between the hinge and the casing;

[0127] The plastic strain value acquisition sub-module 220 is used to acquire the plastic strain value ε at the contact point between the hinge and the casing wall at the i-th moment i ;

[0128] The first parameter acquisition sub-module 230 is used to acquire the outer diameter D0 of the hinge, the elastic modulus E of the casing material, and the friction coefficient f2 between the hinge and the casing;

[0129] The hinge pressing force acquisition sub-module 240 is communicatively connected to the interference amount acquisition sub-module, the plastic strain value acquisition sub-module, and the first parameter acquisition sub-module, and is used to acquire the hinge pressing force according to the acquired ΔD, ε i 、D0、E and f2.

[0130] In one embodiment, the interference amount acquisition sub-module includes:

[0131] The vertical force acquisition unit is used to acquire the vertical force F exerted on the hinge by the pressing device i压入 ;

[0132] The descending displacement acquisition unit is used to acquire the displacement of the device descending at the i-th moment;

[0133] The second parameter acquisition unit is used to acquire the outer diameter D0 of the hinge and the elastic modulus E of the casing material;

[0134] The interference amount acquisition unit is communicatively connected to the vertical force acquisition unit, the descending displacement acquisition unit, and the second parameter acquisition unit, and is used to acquire the interference amount ΔD between the hinge and the casing according to the acquired F i压入 、L i设备 、D0 and E.

[0135] In one embodiment, the plastic strain value acquisition sub-module includes:

[0136] The vertical force acquisition unit is used to acquire the vertical force F exerted on the hinge by the pressing device i压入 ;

[0137] The hinge pressing-in length acquisition unit is used to acquire the total length X of the hinge that has been pressed in at the i-th moment i ;

[0138] The fitting constant acquisition unit is used to acquire the first fitting constant A and the second fitting constant m;

[0139] The initial stress value acquisition unit is used to acquire the initial yield stress σ0 of the casing;

[0140] The plastic strain value acquisition unit is communicatively connected to the vertical force acquisition unit, the fitting constant acquisition unit, and the initial stress value acquisition unit, and is configured to obtain the plastic strain value ε i压入 of the contact point between the hinge and the casing wall at the i-th moment according to F i , X i , A, m, and σ0.

[0141] In one embodiment, F i压入 , L i设备 are parameters during the movement of the device and can be directly read from the device.

[0142] In one embodiment, the fitting constant acquisition unit includes:

[0143] The vertical force acquisition subunit is configured to obtain the vertical force F i压入 exerted on the hinge by the pressing device at the i-th moment during the process of pressing the hinge into the casing;

[0144] The hinge pressing length acquisition subunit is configured to obtain the total length X i of the hinge that has been pressed in at the i-th moment;

[0145] The pressing angle acquisition subunit is configured to obtain the angle θ i between the pressing force and the axis of the hinge when pressing the hinge at the i-th moment;

[0146] The stress value acquisition subunit is configured to obtain the stress value σ i at the contact point between the hinge and the casing wall at the i-th moment;

[0147] The stress-strain curve fitting subunit is communicatively connected to the vertical force acquisition subunit, the hinge pressing length acquisition subunit, the pressing angle acquisition subunit, and the stress value acquisition subunit, and is configured to fit the stress-strain curve according to X i , θ i , σ i and the stress-strain equation;

[0148] The fitting constant acquisition subunit is communicatively connected to the stress-strain curve fitting subunit, and is configured to obtain the first fitting constant A and the second fitting constant m by fitting the stress-strain curve.

[0149] As described above, the i-th moment can also be described as real time and does not have the function of defining a moment. For example, the stress value σ i at the contact point between the hinge and the casing wall at the i-th moment can also be described as the real-time stress value of the contact point between the hinge and the casing wall.

[0150] Based on the same inventive concept, an embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, all or part of the method steps of the above method are implemented.

[0151] The implementation of all or part of the processes in the above method by the present invention can also be completed by instructing relevant hardware through a computer program. 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 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 computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), 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.

[0152] Based on the same inventive concept, an embodiment of the present application further provides an electronic device, including a memory and a processor. The memory stores a computer program running on the processor. When the processor executes the computer program, all or part of the method steps in the above method are implemented.

[0153] The so-called processor may be a central processing sub-module (Central Processing Unit, CPU), or may also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate arrays (Field-Programmable Gate Array, FPGA), 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 computer device and connects various parts of the entire computer device through various interfaces and lines.

[0154] The memory can be used to store computer programs and / or modules. By running or executing the computer programs and / or modules stored in the memory and calling the data stored in the memory, the processor can implement various functions of the computer 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 and 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, video data, etc.). In addition, the memory can include high-speed random access memory and can also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a SmartMedia Card (SMC), a Secure Digital (SD) card, a Flash Card, at least one magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0155] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, a server, or a computer program product. Therefore, the present invention can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage, etc.) containing computer-usable program code.

[0156] The present invention is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), servers, and computer program products according to the embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram can be implemented by computer program instructions, and the combination of the flows and / or blocks in the flowchart and / or block diagram can also be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for implementing the functions specified in Figure 1 one or more flows Figure 1 or multiple flows and / or blocks

[0157] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device, and the instruction device implements the functions specified in Figure 1 one or more flows Figure 1 or multiple flows and / or blocks

[0158] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus, so that a series of operation steps are executed on the computer or other programmable apparatus to produce a computer-implemented process, thereby providing instructions for implementing the steps specified in one process or a plurality of processes and / or blocks Figure 1 in one block or a plurality of blocks Figure 1 of the functions specified in the process(es).

[0159] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A method for determining the articulated pressing force, characterized in that, Including the following steps: Step S1: Obtain the press-in stress-strain data during the hinge press-in of the casing, and the structural parameters of the hinge and the casing; Step S2: Obtain the hinge press-in force according to the obtained press-in stress-strain data, and the structural parameters of the hinge and the casing; The said Step S2 specifically includes the following steps: Step S21, obtain the interference amount between the hinge and the sleeve ; Step S22, obtaining the plastic strain value of the contact point between the hinge and the casing wall at the i-th moment ; Step S23: Obtain the articulated outer diameter , the elastic modulus E of the casing material, and the friction coefficient between the articulation and the casing ; Step S24. According to the obtained , , , E and , obtain the articulated pressing force; , Among them, the interference amount between the hinge and the sleeve is the difference between the diameter of the bushing or hinge and the diameter of the sleeve; The said Step S21 specifically includes the following steps: Step S211: Obtain the vertical force exerted by the pressing device on the hinge ; Step S212: Obtain the displacement of the device descending at the i-th moment and the angle between the pressing force when pressing into the hinge and the axis of the hinge at the i-th moment ; Step S213, obtain the articulated outer diameter , the elastic modulus E of the casing material; Step S214. According to the obtained , , and E, obtain the interference amount of the hinge and the sleeve; 。 2. The articulated pressing force determination method according to claim 1, characterized in that, The said Step S22 specifically includes the following steps: Step S221: Obtain the vertical force exerted by the pressing device on the hinge ; Step S222, obtain the total length that has been pressed into the hinge at the i-th moment ; Step S223: Obtain the first fitting constant A and the second fitting constant m; Step S224, obtain the initial value of the yield stress of the casing ; Step S225, according to , , A, m, and , obtain the plastic strain value of the contact point between the hinge and the casing wall at the i-th moment ; Among them, is the hinge height, is the friction coefficient between the hinge and the pressing equipment.

3. The articulated pressing force determination method according to claim 2, characterized in that, The said Step S223 specifically includes the following steps: Step S2231: Obtain the vertical force exerted by the pressing device on the hinge at the i-th moment during the process of press-fitting the hinged sleeve ; Step S2232: Obtain the total length that has been pressed into the hinge at the i-th moment ; Step S2233: Obtain the angle between the pressing force when pressing into the hinge at the i-th moment and the axis of the hinge ; Step S2234, obtain the stress value of the contact point between the hinge and the casing wall at the i-th moment ; Step S2235. According to , , and the stress-strain equation, fit the stress-strain curve; Step S2236: Obtain the first fitting constant A and the second fitting constant m by fitting the stress-strain curve.

4. An articulated pressing force determination system, characterized in that, Including: A press-in stress-strain data and parameter acquisition module, configured to obtain the press-in stress-strain data during the hinge press-in of the casing, and the structural parameters of the hinge and the casing; A hinge press-in force acquisition module, communicatively connected to the press-in stress-strain data and parameter acquisition module, and configured to obtain the hinge press-in force according to the obtained press-in stress-strain data, and the structural parameters of the hinge and the casing; The said hinge press-in force acquisition module includes: The interference amount acquisition sub-module is used to acquire the interference amount between the hinge and the casing ; The plastic strain value acquisition sub-module is used to acquire the plastic strain value of the contact point between the hinge and the casing wall at the i-th moment ; The first parameter acquisition sub-module is used to acquire the articulated outer diameter , the elastic modulus E of the casing material, and the friction coefficient between the articulation and the casing ; The articulated pressing force acquisition sub-module, which is communicatively connected to the interference amount acquisition sub-module, the plastic strain value acquisition sub-module, and the first parameter acquisition sub-module, is configured to obtain the articulated pressing force according to the acquired , , , E, and ; ， Among them, the interference between the hinge and the sleeve is the difference between the diameter of the bushing or hinge and the diameter of the sleeve; The said interference amount acquisition sub-module includes: A vertical force acquisition unit for acquiring the vertical force exerted by the pressing device on the hinge ; A descent displacement acquisition unit, configured to obtain the displacement of the device descending at the i-th moment; The second parameter acquisition unit is used to acquire the articulated outer diameter , the elastic modulus E of the casing material; The interference amount acquisition unit is communicatively connected to the vertical force acquisition unit, the descending displacement acquisition unit, and the second parameter acquisition unit, and is configured to obtain the interference amount between the hinge and the casing according to the acquired , , and E ; 。 5. The articulated pressing force determination system according to claim 4, wherein The said plastic strain value acquisition sub-module includes: A vertical force acquisition unit for acquiring the vertical force exerted by a pressing device on a hinge ; A hinged press-in length acquisition unit for acquiring the total length of the hinged press-in at the i-th moment ; A fitting constant acquisition unit, configured to obtain the first fitting constant A and the second fitting constant m; A stress initial value acquisition unit for acquiring the initial yield stress of the casing ; The plastic strain value acquisition unit, which is communicatively connected to the vertical force acquisition unit, the fitting constant acquisition unit, and the initial stress acquisition unit, is configured to obtain the plastic strain value at the contact point between the hinge and the casing wall at the i-th moment according to , , A, m, and ; ​ Among them, is the articulation height, is the friction coefficient between the articulation and the press-fitting device.

6. The articulated pressing force determination system according to claim 5, characterized in that, The said fitting constant acquisition unit includes: A vertical force acquisition subunit, configured to acquire the vertical force exerted by the pressing device on the hinge at the i-th moment during the process of hinge-pressing the sleeve ; An articulated pressing-in length acquisition subunit, which is used to acquire the total length that has been pressed into the articulation at the i-th moment ; A pressing-in angle acquisition subunit, configured to acquire an angle between a pressing-in force and an axis of a hinge at the i-th moment when pressing in the hinge ; A stress value acquisition subunit, configured to acquire the stress value at the contact point between the hinge and the casing wall at the i-th moment ; The stress-strain curve fitting subunit, communicatively connected to the vertical force acquisition subunit, the articulated pressing-in length acquisition subunit, the pressing-in angle acquisition subunit, and the stress value acquisition subunit, is configured to fit the stress-strain curve according to , , and the stress-strain equation; A fitting constant acquisition sub-unit, communicatively connected to the stress-strain curve fitting sub-unit, and configured to obtain the first fitting constant A and the second fitting constant m by fitting the stress-strain curve.

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