Method for calculating separating force of connector jack

Abstract

The invention discloses a method for calculating the separating force of a connector jack, which belongs to the technical field of electric connectors, is used for calculating the separating force and checking the stress of a cantilever beam type jack, and comprises the following steps: (a) inputting the geometric parameters of a jack reed; (b) calculating a separating force; (c) checking stress; through a cantilever beam mechanical model and a calculus algorithm and in combination with an MATLAB GUI parameterization design system, high-precision calculation of + / -5% of the separating force of the connector jack and integrated solution of automatic stress checking and service life prediction are achieved, and design efficiency and reliability are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical connectors, in particular to a method for calculating the separation force of a connector jack. BACKGROUND

[0002] In connector design, the estimation of traditional jack separation force mainly relies on engineering experience, lacking effective quantitative models. This experience-dependent method is prone to inaccurate prediction of separation force, which in turn affects the overall performance and reliability of the product; without introducing an effective stress checking mechanism, the spring often deforms and misplaces under overload, which not only affects the service life of the connector, but also causes poor contact and increases the risk of failure.

[0003] In addition, the existing design lacks a checking mechanism for the internal spring stress of the connector jack. This means that when the connector is subjected to strong external load, the spring is at risk of damage due to plastic deformation, which not only affects the performance of the connector, but also shortens its service life, further weakening the reliability of the product.

[0004] Therefore, there is an urgent need for a technical solution that can accurately predict the separation force, ensure stress safety, and accurately assess performance changes after mechanical life, to improve the product quality and service life of the connector. SUMMARY

[0005] The present application aims to overcome the difficulties in the background art and provides a method for calculating the separation force of a connector jack that can accurately predict the separation force, ensure stress safety, and accurately assess performance changes after mechanical life, to improve the product quality and service life of the connector.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows: a method for calculating the separation force of a connector jack, for calculating the separation force and stress checking of a cantilever beam type jack, comprising the following steps: (a) Input the jack spring geometric parameters: spring contact area inner diameter R1, spring contact area outer diameter R2, distance from spring fixed end to contact point a, single spring circumferential development angle β, spring number n, angle between pin-spring contact surface normal and axial direction α, normal deflection of contact point ; (b) Calculate the separation force: based on the cantilever beam model, calculate the total separation force f of the jack by formula: Where E is the elastic modulus of the spring material, and μ is the friction coefficient of the pin-spring contact surface; (c) Stress checking: calculate the maximum bending stress σ of the spring root max : and verify σmax ≤σ s / n s ,σ s For material yield strength, n s Safety factor.

[0007] Further, the cantilever beam model is constructed in the following way: the reed is simplified as a cantilever beam structure with the fixed end connected to the jack and the free end located at the contact point.

[0008] Further, the physical relevance of the geometric parameters of the cantilever beam model includes: the neutral layer radius r = (R1 + R2) / 2; the reed thickness h = R2 - R1; the micro-element arc length dl = r ( The central angle of the micro-element).

[0009] Further, the separation calculation process in step (b) includes: deriving the micro-element normal force of the reed

[0010] ; integrating to solve the total separation force of a single reed .

[0011] Further, the separation force prediction after mechanical life includes: inputting the target number of insertions, correcting h or based on the material fatigue characteristics, recalculating the separation force and stress; parameter visualization: generating a curve of the separation force with deflection , reed wall thickness R2 - R1.

[0012] Further, the parameter input in step (a) is: selecting the preset parameters of the material library through the graphical user interface (MATLAB GUI), the material library includes the elastic modulus, yield strength and density of phosphor bronze, QSn4-3, C17200 and H62; setting the friction coefficient μ = 0.15 ~ 0.2 according to the material surface roughness, and the safety factor n s = 1.1 ~ 1.3.

[0013] Further, a computing system for implementing any of the methods of claims 1-6, comprising a parameter input module for receiving jack geometry parameters and material parameters; a core calculation module for performing separation force calculation, stress checking and life prediction algorithm; a result output module for outputting separation force values, stress checking conclusions and dynamic curve graphs.

[0014] The connector jack separation force calculation method provided by the application has the following beneficial effects: The application realizes high-precision calculation of connector jack separation force ± 5%, automatic stress checking and life prediction integrated solution by combining the cantilever beam mechanical model and calculus algorithm with the MATLAB GUI parameterized design system, which significantly improves the design efficiency and reliability. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The schematic diagram of the connector jack separation force calculation process used for the connector jack separation force calculation method of the application.

[0016] Figure 2 The schematic diagram of the cantilever beam jack used for the connector jack separation force calculation method of the application.

[0017] Figure 3 The schematic diagram of the effect of the reed microelement on the pendant microelement when the jack is separated from the pendant in the connector jack separation force calculation method of the application.

[0018] Figure 4 The schematic diagram of the connector jack and pendant used for the connector jack separation force calculation method of the application.

[0019] Figure 5 The schematic diagram of the maximum bending moment used for the connector jack separation force calculation method of the application.

[0020] Figure 6 The schematic diagram of the MATLAB GUI interface of the connector jack separation force calculation method of the application.

[0021] Figure 7 The schematic diagram of the cantilever beam jack structure used for the connector jack separation force calculation method of the application.

[0022] Figure 8 The schematic diagram of the algorithm flow used for the connector jack separation force calculation method of the application.

[0023] Figure 9 The schematic diagram of the initial interface used for the connector jack separation force calculation method of the application.

[0024] Figure 10 The schematic diagram of the calculation result interface used for the connector jack separation force calculation method of the application.

[0025] Figure 11 The schematic diagram of the geometric parameters of the calculation result interface used for the connector jack separation force calculation method of the application.

[0026] Figure 12 The schematic diagram of the material parameters of the calculation result interface used for the connector jack separation force calculation method of the application.

[0027] Figure 13 The schematic diagram of the cantilever beam structure of the calculation result interface used for the connector jack separation force calculation method of the application.

[0028] Figure 14 The schematic diagram of the analysis chart interface used for the connector jack separation force calculation method of the application.

[0029] Figure 15 The calculation result and the checking interface diagram for the connector jack separation force calculation method of the application.

[0030] Figure 16 The result analysis interface diagram for the connector jack separation force calculation method of the application. DETAILED DESCRIPTION

[0031] The technical solutions of the application will be described clearly and completely in combination with specific embodiments of the application. The described embodiments are only some of the embodiments of the application, rather than all. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application. EMBODIMENT

[0032] The application provides a connector jack separation force calculation method, which simplifies jack spring leaves into cantilever beams with fixed ends connected to jack bases and free ends located at contact points, solves normal forces and separation forces by means of calculus, and deduces a maximum stress checking formula.

[0033] As Figures 1-5 described, the application first analyzes factors influencing the separation force and stress of the cantilever beam model connector jack structure, then combines the mechanical characteristics of the cantilever beam structure, calculates the jack separation force by means of software programming, and performs stress checking to confirm whether the design requirements are met. The application is used for the separation force calculation and stress checking of the cantilever beam connector jack, and the construction mode of the cantilever beam model is as follows: the spring leaves are simplified into cantilever beam structures with fixed ends connected to jack bases and free ends located at contact points. The physical correlation of the geometric parameters of the cantilever beam model includes: the neutral layer radius r=(R1+R2) / 2; the spring leaf thickness h=R2-R1; the micro-element arc length dl=r ( is the micro-element central angle). Specifically, the following steps are included: (a) input the jack spring leaf geometric parameters: the spring leaf contact area inner diameter R1, the spring leaf contact area outer diameter R2, the distance a from the spring leaf fixed end to the contact point, the single spring leaf circumferential development angle β, the spring leaf number n, the contact surface normal line and the axial angle α of the contact point normal deflection ; the above parameter input mode is: the pre-set parameters of the material library are selected through the graphical user interface (MATLAB GUI), the material library includes the elastic modulus, yield strength and density of phosphor bronze, QSn4-3, C17200 and H62; the friction coefficient is set according to the material surface roughness, the friction coefficient μ=0.15~0.2, and the safety factor n s =1.1~1.3. The spring leaf angle β satisfies 90°≤β≤150°, and the contact point deflection satisfies 0.1mm≤ ≤0.3mm.

[0034] The geometric parameters of this application are shown in Table 1; Parameter Value / adjustable Explanation Inner diameter R1 / mm 0.41 Spring inner hole diameter Outer diameter R2 / mm 0.6 Spring outer hole diameter Cantilever length a / mm 2.7 Fixed end to contact point distance Spring angle β 120 Individual spring angle Number of springs n 2 Number of jack spring Contact angle a 3.5 Insertion angle Deflection vA 0.2 Deflection Table 1 Geometric parameters;

[0035] The materials selected in this application are commonly used copper alloy materials. Additional material types can be added as needed, as shown in Table 2. Name Elastic modulus / Pa Yield strength / Pa Density kg / m3 Phosphor bronze 120 x 10 9 ]] 450 x 10 6 ]] 8800 QSn4-3 117 x 10 9 ]] 400 x 10 6 ]] 8700 C17200 135 x 10 9 ]] 1048 x 10 6 ]] 8250 H62 100 x 10 9 ]] 360 x 10 6 ]] 8440 Table 2 Mechanical parameters of contact material.

[0036] (b) Calculation of separation force: Based on the cantilever beam model, the total separation force f of the insertion hole is calculated using the formula: Where E is the elastic modulus of the spring material, and μ is the coefficient of friction of the pin-spring contact surface.

[0037] (c) Stress check: Calculate the maximum bending stress σ at the root of the reed. max : And verify σ max ≤σ s / n s , σ s Where is the yield strength of the material, and ns is the safety factor.

[0038] The cantilever beam type socket provided in this application is first narrowed, such as... Figure 2 As shown, the spring undergoes plastic deformation; during insertion, the elastic spring in the socket deforms elastically under the action of the pin, ensuring effective contact between the pin and the socket in the contact area. Since the elastic spring is fixed at only one end, its infinitesimal element can be approximated as a cantilever beam, as shown in the simplified diagram. Figure 2 As shown. Point A is the contact point between the socket spring and the pin, point B is the top of the socket spring, L is the length of the socket spring, a is the distance between the contact point and the fixed end of the spring, α is the angle between the socket spring and the insertion direction when inserted, and FN is the normal pressure at the contact point of the socket spring. Then the deflections at the contact point A and the top of the socket spring B are respectively: ①; ②; in: —The moment of inertia of the beam's cross section about the neutral axis z-axis; E — the elastic modulus of the material.

[0039] From equation ①, we can see that the normal pressure at the contact point is... ③; The separation force of a socket is typically tested using a standard lifting weight, such as... Figure 3As shown, the angle is The micro-reed of the angle R1 / R2 / r as the research object, where R1 is the inner diameter of the reed, R2 is the radius of the reed shape, and r is the neutral layer radius of the reed. ④; Let the arc length of the reed micro-element be dl, and the thickness of the reed be h. ⑤; ⑥; The moment of inertia of the reed micro-element cross section about the neutral axis z axis is: ⑦; Substitute formula ⑦ into formula ③, eliminate , it can be known that the normal force of the reed micro-element at the contact point is: ⑧; As shown in Figure 3 , the micro-reed is taken as the research object, and the part of the pendant corresponding to the micro-reed reed is taken as the pendant micro-reed, and the angle is The micro-reed of the angle R1 / R2 / r as the research object, where R1 is the inner diameter of the reed, R2 is the radius of the reed shape, and r is the neutral layer radius of the reed. , the normal pressure at the contact of the jack, and the gravity G of the jack, then in the x direction: ⑨; According to the friction law, the friction force of the pendant micro-element is: ⑩; Since , it is Thus: ; Where: The friction coefficient of the contact surface between the pin and the jack is selected according to the surface roughness of the contact part (generally 0.15-0.2). According to formula , the separation force of the pendant is approximately equal to the gravity of the pendant. At the same time, let the angle of a single reed be , and substitute formula ⑧ into formula , it can be known that the separation force of a single reed is: ; The number of reeds of the jack is n, then the total separation force of the jack is: ; Maximum stress check: the reed can be approximated as a cantilever beam model, and the bending moment at the fixed end (root) is the largest, so the maximum stress occurs at the fixed end. According to the maximum bending stress formula of material mechanics: ; Where c is the distance from the neutral axis of the cross-section to the edge; for a rectangular cross-section, c = h / 2. The maximum bending moment occurs at the fixed end (the root of the notch). (here It is the normal force acting at contact point A, with lever arm a). Each reed element is distributed along the circumference; during calculation, the lever arm of each reed element is... Integrating gives the whole reed. (That is, the total normal force of each reed is the integral of the normal force corresponding to f1 mentioned above). Therefore, the total normal force of each reed... : ; At this point, the maximum bending moment experienced by the entire reed is at the root, therefore the maximum bending stress of each reed is: ; Converting angles to radians, we have: ; Stress check, design criteria: ; in: - Material yield strength; n - Safety factor (usually taken as 1.1 to 1.3).

[0040] This application also includes a computing system for implementing the above method, such as... Figures 6-10 The system includes a parameter input module that receives jack geometry parameters and material parameters; a core calculation module that executes separation force calculation, stress verification, and life prediction algorithms; and a result output module that outputs separation force values, stress verification conclusions, and dynamic curves.

[0041] Combined with the appendix to this application specification Figure 8 As can be seen from the above, through the attachment Figure 8 The provided flowchart and algorithm fully describe the core process of calculating the cantilever beam socket separation force, forming a closed-loop calculation flow from parameter input and theoretical calculation to result visualization. The algorithm design balances the accuracy and practicality of engineering calculations, making it suitable for engineering optimization design applications. This calculation method has been applied to the socket separation force calculation of various products in our company, such as the J599 series and YMB series, with the theoretical calculation differing from the actual situation within ±5%.

[0042] Example 2 Based on the above embodiments, this embodiment predicts the separation force after mechanical life; Step 1: Enter the target number of plug-in / plug-out cycles; Step 2, adjust h or according to the material fatigue characteristics. , Step 3: Recalculate the separation force and stress; Parameter visualization: Production separation force as a function of deflection The curve showing the variation of the reed wall thickness R2-R1.

[0043] This application provides a calculation method that allows for the rapid and accurate calculation of socket separation force and stress verification using different materials to confirm whether the design requirements are met. Secondly, it allows for the selection of different materials to predict the magnitude of socket separation force after mechanical life.

[0044] Example 3 Based on the above embodiments, such as Figures 11-16 The present embodiment performs calculation system verification, enabling the present invention to determine the magnitude of the separation force and confirm the corresponding deflection and wall thickness based on the deflection separation force and wall thickness separation force curves.

[0045] Geometric parameter region, input R1,R2,a,β,n,α, ; In the material selection area, select Phosphor Bronze / QSn4-3 / C17200 / H62 from the drop-down menu; In the parameter verification area, set μ,n s And the number of times it is plugged in and unplugged.

[0046] like Figure 10 As shown, the output interface is: Numerical results, separation force Maximum stress Verification conclusions; Analyze charts, such as Figure 14 , 16 As shown; Separation force-deflection curve ( Variation from 0.1 to 0.3 mm), separation force-wall thickness curve ( (Varies from 0.15 to 0.25 mm).

[0047] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0048] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature described. The specification can include implicit combinations of explicitly mentioned features and / or explicit combinations of implicitely mentioned features. Each embodiment depends on the explicit combinations of features and / or the implicit combinations of features made specifically within that embodiment, and each such embodiment can be combined with every other such embodiment to create further embodiments.

Claims

1. A method for calculating the separation force of a connector socket, used for calculating the separation force and stress verification of a cantilever beam type socket, characterized in that, Includes the following steps: (a) Input the geometric parameters of the spring contacts: inner diameter R1 of the spring contact area, outer diameter R2 of the spring contact area, distance a from the fixed end of the spring to the contact point, circumferential unfolding angle β of a single spring, number of springs n, angle α between the normal of the pin-spring contact surface and the axial direction, and normal deflection of the contact point. ; (b) Calculation of separation force: Based on the cantilever beam model, the total separation force f of the insertion hole is calculated using the formula: Where E is the elastic modulus of the spring material, and μ is the coefficient of friction of the pin-spring contact surface; (c) Stress check: Calculate the maximum bending stress σ at the root of the reed. max : And verify σ max ≤σ s / n s , σ s n represents the yield strength of the material. s This is for the safety factor.

2. The method for calculating the connector socket separation force according to claim 1, characterized in that: The cantilever beam model is constructed by simplifying the spring into a cantilever beam structure with the fixed end connected to the socket base and the free end located at the contact point.

3. The method for calculating the connector socket separation force according to claim 2, characterized in that: The physical correlations of the geometric parameters of the cantilever beam model include: neutral layer radius r = (R1 + R2) / 2; spring thickness h = R2 - R1; and infinitesimal arc length dl = r ( (The central angle of the infinitesimal element).

4. The method for calculating the connector socket separation force according to claim 1, characterized in that: The separation calculation process in step (b) includes: deriving the normal force of the spring element. Solve for the total separation force of a single reed by integration. .

5. The method for calculating the connector socket separation force according to claim 1, characterized in that, Also includes: Mechanical life separation force prediction: Input target insertion and extraction times, and adjust h or based on material fatigue characteristics. Recalculate the separation force and stress; Parameter visualization: Generating separation force as a function of deflection The curve showing the variation of the reed wall thickness R2-R1.

6. The method for calculating the connector socket separation force according to claim 1, characterized in that: The parameter input method in step (a) is as follows: Select the preset parameters of the material library through the graphical user interface (MATLAB GUI). The material library includes the elastic modulus, yield strength and density of phosphor bronze, QSn4-3, C17200 and H62; set the friction coefficient μ=0.15~0.2 and the safety factor ns=1.1~1.3 according to the surface roughness of the material.

7. A computing system for implementing any one of the methods of claims 1-6, characterized in that: It includes a parameter input module that receives jack geometry and material parameters; and a core calculation module that performs separation force calculation, stress verification, and life prediction algorithms. The results output module outputs the separation force value, stress verification conclusion, and dynamic curve.

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