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SL1126机体零件的结构优化与工艺设计
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摘要
本论文涉及SL1126柴油机机体的结构优化和机械加工艺设计(生产纲领:30000台/年)。该产品即将投入生产,故而本课题的实际性与针对性极强,为此,本文针对所涉及的设计、计算、材料及结构优化等内容进行了较详尽的研究。
     本文内容包括机体零件的优化与机加工工艺设计两大部份。
     由于原样机采用经验设计,手工翻砂铸造。因而有必要对其结构作进一步优化。在分析过程中采用了Designspace6.0对它进行了应力分析、变形分析。从而在理论上提出了对原设计进行了优化的必要性与可行性,通过受力分析和工艺分析对原设计作了多处优化。由于Solidworks2000具有强大的三维造型功能,并且能很方便地与Designspace6.0交换数据及可以直接获得DWG格式的工程图,所以本文采用Solidworks2000进行图形处理。修改后的机体同样用Solidworks2000进行图形文件处理和用DesignSpace6.0对其作各种应力和变形分析与对此计算,然后对所得数据采用正交法进行筛选,从而证实了优化的可行性与合理性。
     针对已优化的机体,按刚性生产线及生产纲领制定出一整套机加工工艺。包括工艺流程、刀具的选用、机床的功率计算及布置等。由于机体结构极为复杂并直接关系到整机的性能及成本,故对工艺路线进行了多次筛选与优化,以力求在保证精度的前提下工艺路线最短,经济性最佳。
     经研究与分析,本课题完成了SL1126柴油机机体的结构优化及生产线的基本设计。为该产品投入实际生产提供了理论依据及基本方案。
This paper is about SL1126 diesel internal-combustion engine's cylinder body part structure optimization and process design of mechanical machining (yield:30000/peryear). For the product will be put into production soon. So, the study is focal on accrual product. The paper carries on detailed discuss for the study.
    Body's structure optimization's simulation and machining process are the two part of the paper.
    For the former prototype is based on experience design and sand-cast and found are both done by hand. Obliviously, Optimization for the body structure is needed. During the analysis, where the software Designspace is used to do stress and performances analyze, the nessesarity and feasibility of the optimization is proofed in theory . As to Solidworks has very strong 3-D modeling capability, especially it can exchange data directly with Desgnspace through DWG format engineering drawings, With this priority, Solidworks is deployed .To make sure the optimization's reasonability and feasibility, the constructed modified model is re-analyzed by Designspace.
    Aiming at producing the optimized diesel body, considering the yield plan and diesel body's special structure, an integrated machining process, including process route ,the choice of the cutter and power .location of the machine tool, is worked out.
    Considering the body's structure is complicated and has direct influence in the integrated performance and cost. To ensure the shorter route and better economity, best of the feasible schemes are chosed.
    To conclusion, the paper fully completes the body's structure optimization and the basic product line design. By the end of paper, valuable Advice and improvement is accessable.
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