锻压技术

七杆式复合驱动伺服冲床的机构合成研究

英文标题：Research on mechanism synthesis of seven-link hybrid-driven servo press

作者：金旭星

单位：无锡职业技术学院

分类号：TH113

出版年,卷(期):页码：2013,38(3):107-110

摘要：

为实现七杆式复合驱动伺服冲床机构的高效合成，探究不同伺服转速下的冲压曲线特性。将机构的下死点肘节构型及双曲柄的存在作为限制条件，以闭合矢量法建立了滑块的冲压曲线数理模型，并利用MATLAB软件对具体算例进行分析。结果表明:伺服转速对机构的急回特性及公称压力区的冲头速度有很大影响；伺服曲柄对定速曲柄的转速比在0.5~2之间时，小转速比适用于材料的拉延加工，大转速比则适用于冲剪加工，并有助于提高生产效率；当伺服曲柄固结时，该七杆式伺服冲床可方便地变异为六杆式简易冲床，增强了冲压加工的适应性。软件分析与理论计算的结果极为吻合，该机构的合成方法可靠，所获模型正确。

A seven-link hybrid\|driven servo press was presented in order to efficiently achieve the mechanism synthesis, and make a research on the characteristics of stamping curves according to different servo speeds. Firstly, both toggle configurations at bottom point and double-crank existence were determined as the limiting conditions. And then a stamping curve model of the slider was established by means of closed vector method. Finally, a specific example was quantitatively analyzed and discussed using MATLAB software. The results show that the servo speeds have a large affect on the quick return characteristics and the punch speed in nominal pressure zone. When the speed ratio of servo crank to constant crank is between 0.5 and 2, the smaller ratio is suitable to drawing processing. However, the lager ratio is suitable to cutting processing, and is contribute to processing efficiency. Additionally, if the servo crank is fixed, the seven-link servo press would be easily converted to a six\|link general press, which would promote the adaptability for processing requirements. Moreover, the results from software analysis is very consistent with that of theoretical calculations, the synthesis method of the seven-link mechanism is reliable, and the mathematical model obtained is correct.

基金项目：

江苏省首批高校优秀中青年骨干教师和校长境外研修项目(JSE20110930)

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