板材单点增量成形夹具设计含4张CAD图+说明书

夹具装配图

板材单点增量成形夹具设计
摘要：单点增量成形作为一种新型板材柔性无模成形技术，其基于分层制造思想，通过工具头一层一层加工金属板料，柔性化程度高，利用局部变形实现金属板料零件的加工。和传统冲压成形相比，不需要专用设备和模具，能够缩短产品研发周期，降低产品研发成本，特别适用于多品种、小批量以及个性化生产，在汽车、船舶、家电、航天航空等领域有广泛的应用前景。当前单点增量成形过程中一般采用上下压板和螺栓对板料进行夹持，其过程需要人工辅助，严重影响加工效率，为了解决这一问题，需要设计一种具有自动压紧定位功能的新型板材单点增量成形夹具。
采用有限元仿真和实验相结合的方法，得到单点增量成形过程中各向变形力的变化规律，对其成形角、层间距、板料厚度及工具头直径对变形力的影响进行研究，得到不同工艺参数下成形过程的最大变形力；根据得到的最大变形力选择成形夹具的压板尺寸和压紧方式，分别利用AutoCAD和Solidworks软件进行成形夹具的二维和三维设计，并对夹具的可行性进行三维动画模拟，最终得到一种可以大幅度提高装夹效率的成形夹具。
关键词：单点增量成形；数值分析与建模；变形力；夹具设计；
Abstract：Single point incremental forming is a new type of sheet metal flexible dieless forming technology. Based on the idea of ??layered manufacturing, the metal sheet is processed one layer at a time through the tool head. The degree of flexibility is high, and the metal sheet part is realized by local deformation. Processing. Comparedwith traditional press forming, it does not require special equipment and molds,which can shorten the product development cycle and reduce the cost of product development. It is especially applicable to manyvarieties, small batches, and individualized production. It has applications in automobiles, ships, home appliances, aerospace and other fields. Wide application prospects. In the current single-point incremental forming process, upper and lower press plates and bolts are generally used to clamp the sheet material, and the process needs manual assistance,which seriously affects the processing efficiency. To solve this problem, a new type of automatic pressing and positioning function needs to be designed. Sheet single point incremental forming fixture.
In this paper, finite element simulation and experimental methods are used to obtain thevariation law of the isotropic deformation force in the single-point incremental forming process. The effects of forming angle, layer spacing, sheet thickness, and tool head diameter on the deformation force are studied. The maximum deformation force of the forming process under different process parameters is obtained; the platen size and compression method of the forming fixture are selected according to the obtained maximum deformation force, and the two-dimensional and three-dimensional design of the forming fixture are respectively performed using AutoCAD and Solidworks software, and the fixture is The feasibility of three-dimensional animation simulation, and ultimately get a fixture can greatly increase the clamping efficiency.
Keywords: single point incremental forming; numerical analysis and modeling; deformation force; fixture design;
目录
摘要I
Abstract： II
1绪论1
1.1单点增量成形的原理1
1.2单点增量成形的国内外研究现状2
1.3本文研究主要内容3
2单点增量成形过程变形力分析5
2.1单点增量成形变形力理论解析5
2.2单点增量成形变形力数值模拟8
2.2.1有限元数值模拟参数设定8
2.2.2变形力模拟结果12
2.2.3工艺参数对变形力的影响14
3单点增量成形过程变形力实验研究19
3.1实验设备介绍19
3.2基于UG的NC代码生成20
3.2.1成形件实体建模21
3.2.2单点增量成形过程加工轨迹的生成21
3.2.3后处理NC程序的生成23
3.3实验结果和模型验证23
4单点增量成形夹具设计27
结论32
致谢33
参考文献34

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