本文選題：多股螺旋彈簧 + 測量技術��； 參考：《重慶大學》2011年碩士論文

【摘要】：本文的主要研究目的是研究多股螺旋彈簧(簡稱多股簧)的動態(tài)運動參數包括:位移、速度、加速度。本文的研究工作是在重慶大學機械工程學院制造自動化實驗室的多股螺旋彈簧數控機床上完成的。 多股螺旋彈簧是由鋼索(通常由3-7股直徑為0.5 - 3.0 mm的碳素彈簧鋼絲纏繞而成)卷制而成的圓柱螺旋彈簧。多股簧根據有沒有中心線可以分為兩種。其中壓縮彈簧的螺旋方向與鋼索的螺旋方向相反,而拉伸彈簧的螺旋方向與鋼索的螺旋方向一致。 迄今為止,在多股簧方面已經進行了大量的研究,其中一篇名為“多股螺旋彈簧的設計和建�！碧岢隽嘶诙喙苫蓴祵W模型的成型方法以及多股簧加工過程中動態(tài)張力的控制;另外一篇題為多股簧的靜態(tài)響應的文章指出了決定多股簧靜態(tài)張力的步驟,而多股簧是由一定數目的平滑鋼絲繞成鋼索后形成的。大量研究表明:和傳統(tǒng)的單股簧相比,在一定的動態(tài)應用下多股螺旋彈簧表現出了更大的阻尼和更長的疲勞壽命。因此,多股簧動態(tài)運動參數的研究非常有意義。 本文用沖擊質量塊沖擊多股簧,通過對多股簧的某些質點進行測量計算,進行研究分析多股簧的運動參數。當多股簧被沖擊時,由于各種各樣的因素,每根簧絲的位移都是非常復雜的,主要影響因素有沖擊塊質量、彈簧的慣性和共振、簧絲之間的摩擦以及簧絲之間的滑移。為了克服這些問題,非接觸、多通道的動態(tài)參數檢測裝置就非常有必要進行研究,主要研究內容包括:檢測裝置機械結構的設計,傳感器的選型與安裝,信號采集器的軟、硬件模塊設計與分析。并且設計了一種與本檢測裝置相配套的新的數據處理算法,來測量分析每根簧絲之間位移和時間,速度和時間,加速度和時間的關系。 研究結果表明當多股簧被沖擊時,每股簧絲都會產生振動。在沖擊開始時,在彈簧的活動端會有一個大的變形而在固定端的變形比較小。在彈簧壓縮的結束階段,由于沖擊能量以縱波的形式從多股簧的沖擊點傳遞到固定端導致固定端產生了一個較大的變形。同時這也表明在多股簧中位移與多股簧的軸向長度是非線性關系的,速度與軸向長度也是非線性關系的。 通過前述實驗研究可知在多股簧的實際設計階段,必須通過研究多股簧的沖擊響應,選擇合理的參數來避免簧絲產生過大的變形量。但是對于多股簧要通過理論分析是很難得到具體的計算公式,所以只能通過實驗分析來進行研究。
[Abstract]:The main purpose of this paper is to study the dynamic motion parameters of multi-helical spring, including displacement, velocity and acceleration. The research work of this paper is carried out on the multi-strand helical spring NC machine tool in the Manufacturing Automation Laboratory of the School of Mechanical Engineering of Chongqing University. The multi-strand helical spring is a cylindrical helical spring made from a steel cable (usually a 3-7 carbon spring with a diameter of 0.5 to 3.0 mm in diameter). Multi-stranded springs can be divided into two types according to whether there is a central line. The helical direction of the compression spring is opposite to the helical direction of the cable, while the helical direction of the tensile spring is the same as the helical direction of the cable. Up to now, a lot of research has been done in the field of multi-strand spring, one of which is called "Design and Modeling of Multi-strand Spiral Spring". The forming method based on the mathematical model of multi-strand spring and the control of dynamic tension in the process of multi-strand spring processing are proposed. Another paper entitled static response of multi-strand spring points out the steps to determine the static tension of multi-strand spring which is formed by a certain number of smooth steel wires. A large number of studies have shown that compared with the traditional single-stranded spring, the multi-strand helical spring has a larger damping and longer fatigue life under certain dynamic application. Therefore, the study of dynamic motion parameters of multi-strand spring is of great significance. In this paper, the motion parameters of multi-strand spring are studied and analyzed by measuring and calculating some particles of multi-strand spring with impact mass block. When multi-strand spring is impacted, the displacement of each spring is very complicated due to various factors, such as the mass of impact block, the inertia and resonance of spring, the friction between spring wires and the slip between spring wires. In order to overcome these problems, it is very necessary to study the multi-channel dynamic parameter detecting device in order to overcome these problems. The main research contents include: the design of the mechanical structure of the detecting device, the selection and installation of the sensor, the soft of the signal collector, Hardware module design and analysis. A new data processing algorithm is designed to measure and analyze the relationship between displacement and time, velocity and time, acceleration and time of each spring wire. The results show that every spring will vibrate when multiple strands are impacted. At the beginning of the impact, there will be a large deformation at the active end of the spring and a smaller deformation at the fixed end. At the end of spring compression, a large deformation occurs at the fixed end due to the transmission of shock energy from the shock point of the multi-strand spring to the fixed end in the form of a longitudinal wave. It also shows that the displacement is nonlinear to the axial length of the multi-strand spring, and the velocity is also nonlinear to the axial length of the multi-strand spring. The experimental results show that in the practical design stage of the multi-strand spring, it is necessary to study the shock response of the multi-strand spring and select reasonable parameters to avoid the excessive deformation of the spring wire. However, it is difficult to obtain the specific calculation formula for the multi-strand spring by theoretical analysis, so it can only be studied by experimental analysis.
【學位授予單位】：重慶大學
【學位級別】：碩士
【學位授予年份】：2011
【分類號】：TH135.1

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