本文關鍵詞：高溫板成形試驗機的研制　出處：《吉林大學》2015年碩士論文　論文類型：學位論文

  更多相關文章： 板成形試驗機 有限元分析 液壓系統 控制系統 加熱爐

【摘要】：隨著高強度材料的出現，相關的研究開始越來越多。盡管高強度材料有著優(yōu)異的性能，，但是其本身的特點使得這種材料比較難以成形，這就限制高強度材料的大規(guī)模應用。在高溫條件下，材料流動性增強，成形所需要的力減小，因此研究高溫下的板料成形有著其研究的意義，材料超塑性性能的研究是目前的研究熱點。 試驗機作為一種專門的工具，可以很好地檢驗材料的力學性能，是材料科學研究的重要試驗設備。試驗機的發(fā)展需要與新材料的不斷出現相適應，傳統的板成形試驗機不能滿足高強度板料的成性試驗，因此需要研制一款新型的板料成形試驗機。 本文從試驗機所要完成的試驗內容出發(fā)，分析設計了一臺高溫下的板料成形實驗機。首先通過理論計算確定了整體結構和基本尺寸，對于關鍵部件使用限元模擬軟件ABAQUS進行校驗和優(yōu)化模擬，分析應力集中部位以及變形較大部位，使整體設計更加合理，根據設計選擇合適的電機和絲杠等部件，完成了整個試驗機的三維模型設計，確保整個機構尺寸設計的合理，保證各個部位在試驗中相互配合而不產生干涉，確保試驗機方案整體可行。 其次根據試驗機的各種動作需求設計了相應的液壓系統以及控制系統，液壓系統采用電液比例控制，以適應各種不同情況的需求，完成了液壓系統圖；控制部分采用PLC進行控制，選擇并設計合適的檢測單元和控制單元，完成硬件接線圖；詳細介紹了整個系統的控制工作流程。 再次對試驗機進行應用分析，進行高溫試驗時設計有最高溫度可達1200℃的加熱爐以滿足對于高溫條件的需求，加熱爐采用井式結構，采用鉬絲作為加熱元件，爐溫采用PID進行調節(jié)控制。 所設計的試驗機更換不同的模具可以進行不同的板料成形試驗，試驗機噸位較大，可以滿足一些難成形板料對于壓邊力以及成形力的需求，高溫爐的加入使得試驗機可以方便的完成高溫下的成形試驗。論文所完成的試驗機可以進行多種板料試驗，適用范圍廣，是目前板料試驗機的發(fā)展趨勢和主要研究方向。
[Abstract]:With the emergence of high strength materials, more and more related research began. Although high strength materials have excellent properties, their own characteristics make it difficult to form this material. This limits the large-scale application of high-strength materials. Under the condition of high temperature, the material fluidity increases and the forming force decreases. Therefore, the research of sheet metal forming at high temperature has its significance. The research on superplastic properties of materials is a hot topic at present. As a special tool, the testing machine can well test the mechanical properties of materials and is an important test equipment for material science research. The development of the testing machine needs to adapt to the continuous emergence of new materials. The traditional sheet forming test machine can not satisfy the forming test of high strength sheet metal, so it is necessary to develop a new kind of sheet forming test machine. In this paper, a sheet metal forming experiment machine at high temperature is designed and analyzed based on the experimental contents of the testing machine. Firstly, the whole structure and basic size are determined by theoretical calculation. For the key components, the finite element simulation software ABAQUS is used to check and optimize the simulation, and the stress concentration and deformation are analyzed to make the overall design more reasonable. According to the design, we select suitable parts such as motor and lead screw, complete the 3D model design of the whole testing machine, ensure the reasonable size design of the whole mechanism, and ensure that all parts cooperate with each other and do not interfere in the test. Ensure the overall feasibility of the testing machine. Secondly, the hydraulic system and control system are designed according to the requirements of the testing machine. The hydraulic system adopts electro-hydraulic proportional control to meet the needs of different situations, and the hydraulic system diagram is completed. The control part uses PLC to control, select and design the appropriate detection unit and control unit, complete the hardware wiring diagram; The control workflow of the whole system is introduced in detail. Thirdly, the application of the tester is analyzed, and the furnace with the highest temperature of 1200 鈩

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