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基于有限位置法的沖壓機構(gòu)擺動力完全平衡設(shè)計
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國家自然科學基金項目(51975062,、51375062)


Design and Analysis of Complete Shaking Force Balance of Stamping Mechanism Based on Finite Position Method
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    摘要:

    基于有限位置法對一種具有兩個末端執(zhí)行器的零耦合度平面高速沖壓機構(gòu)進行擺動力完全平衡設(shè)計,。通過拓撲分析將該機構(gòu)劃分成3個子運動鏈(SKC),,根據(jù)樹系統(tǒng)劃分原則分別確定了各子運動鏈中連枝構(gòu)件以及樹枝構(gòu)件的個數(shù);對機構(gòu)進行位置分析,,依次求解各子運動鏈的質(zhì)量矩,,得到機構(gòu)總質(zhì)量矩與各個構(gòu)件角位置之間的關(guān)系;通過求取機構(gòu)在5個不同位置上的總質(zhì)量矩建立線性方程,,求解得到機構(gòu)擺動力完全平衡時各樹枝構(gòu)件的平衡配重參數(shù)m*i和p*i,;分析了配重參數(shù)m*i、p*i對平衡后總質(zhì)心軌跡波動及總慣性力的影響,。結(jié)果表明,,改變配重質(zhì)量參數(shù)m*i對最終平衡效果影響較大,取m*i為0.002kg時,,機構(gòu)總質(zhì)心軌跡波動和總慣性力在x,、y軸方向上分量比平衡前分別下降了44.44%、59.78%和72.94%,、5.40%,,驗證了擺動力完全平衡條件的有效性。

    Abstract:

    Based on the finite position method, a zero coupling planar high-speed stamping mechanism with two end effectors was designed and analyzed for complete shaking force balance. Firstly, the mechanism was divided into three sub-kinematic chains (SKC) by topological analysis, and the number of connecting branches and branches in each sub-kinematic chain was determined according to the principle of tree system division. Then, the position of the mechanism was analyzed. The mass moment of each sub chain was solved in turn, and the relationship between the total mass moment and the angular position of each component was obtained. By calculating the total mass moment of the mechanism at five different positions, multiple linear equations were established, and the balance weight parameters m*i and p*i of each branch member were obtained. Finally, the influence trend of m*i and p*i on the total center of mass track fluctuation and the total inertial force after balancing was analyzed. It was found that the change of m*i had a greater impact on the final balance effect. When m*i was 0.002kg, compared with that before balancing, the components of the total mass center trajectory fluctuation and the total inertial force in the x and y directions were decreased by 44.44%, 59.78%, 72.94% and 5.40%, respectively, which verified the validity of the condition of complete balance of the pendulum force. The finite position method was simple, effective and easy to program by computer. The research result provided an idea for solving the condition of complete balance of mechanism shaking force.

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沈惠平,聶亞彪,李菊,楊廷力.基于有限位置法的沖壓機構(gòu)擺動力完全平衡設(shè)計[J].農(nóng)業(yè)機械學報,2021,52(4):384-391,,426. SHEN Huiping, NIE Yabiao, LI Ju, YANG Tingli. Design and Analysis of Complete Shaking Force Balance of Stamping Mechanism Based on Finite Position Method[J]. Transactions of the Chinese Society for Agricultural Machinery,2021,52(4):384-391,,426.

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  • 收稿日期:2020-06-20
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  • 在線發(fā)布日期: 2021-04-10
  • 出版日期: 2021-04-10
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