共查询到19条相似文献,搜索用时 375 毫秒
1.
简要介绍了一种新式圆盘切边剪--双头回转式圆盘剪的工作原理和结构特点。并对圆盘剪上下刀盘的间隙和重叠量调整机构、刀架回转机构及刀盘锁紧机构等进行了分析和说明;对剪切力、刀盘间隙和重叠量调整等设计参数的选择作了分析和探讨,对于圆盘剪的设计和计算具有一定的参考价值。 相似文献
2.
3.
切边圆盘剪是带钢精整设备的核心设备之一。本文阐述了圆盘剪的组成、结构、关键零件,并提出了一种圆盘剪刀片重叠量、剪切间隙的调整机构,研究、分析了圆盘剪参数的选择、力能参数的计算,对悬臂式圆盘剪的设计和计算作了一些探讨。 相似文献
4.
5.
6.
《重型机械》2016,(2)
某冷轧厂使用乔格公司生产的圆盘剪剪切超薄规格的取向硅钢。对该圆盘剪的结构原理进行分析;并针对该圆盘剪剪切厚度为0.23mm极薄规格取向硅钢时遇到两个问题:一是剪刃崩刀频繁;二是带钢切边后边浪严重进行研究。通过测量,发现刀轴在轴向的窜动量达到30μm,上下剪刃直接碰撞导致崩刀。采用更换刀轴推力轴承组件的方法使崩刀问题得到了解决。采用了5项措施:1优化剪切间隙及重叠量,使剪切力对边部板形影响最小;2加强润滑维护,保证刀轴旋转阻力最小;3调整带边导向压辊与带钢速度匹配关系减少带边张力影响;4通过调整溜槽角度以减少带边弯曲力影响;5对圆盘剪八字型布置的角度进行调整,减少向外的扭力。最终使剪切边浪幅度由原来的1%,下降为0.8%,边浪密集度大幅减少,可以满足用户的使用要求。 相似文献
7.
文章通过介绍涟钢酸洗切边剪的设备构造及工作原理,分析圆盘剪刀片装配对切边质量的影响、切边时带钢的变形过程以及圆盘剪间隙量与重叠量对带钢切边质量的影响。简单介绍了对切边质量的要求,在普碳钢剪切参数的基础上对深冲钢剪切参数进行了探讨,阐述了影响带钢切边质量的影响因素,并介绍了克服这些影响因素的方法。 相似文献
8.
9.
设计了一种新型碎边剪,分析了刀盘在刀轴上的几种安装方式及安装方式对刀片侧间隙调整的影响。根据设计结构,推导出了侧间隙调整数学模型,为剪刃侧间隙调整机构自动化奠定了基础。对新机型与旧机型进行了对比分析,便于剪切设备的选型。 相似文献
10.
公差设计中的边界控制法 总被引:2,自引:0,他引:2
从零件在互换性设计过程中尺寸公差和形位公差的相互关系着手,通过动态公差图,分析了不同相关要求的功能及合格条件。并提出一种边界控制法,以求在零件几何精度设计中更加灵活、合理地应用各种相关要求。 相似文献
11.
A deburring tool for intersecting holes is proposed. The tool has a hemispherical cutter head mounted on a pivoted shaft which is loaded against the burr edge by a set of springs. The cutter head is inserted into an intersecting hole up to the burr edge and is subsequently rotated counterclockwise with a return stroke. The cutter head size is selected such that the cutter head has maximum accessibility to the three dimensional burr edge. The cutting edge is designed to maintain proper ranges of rake angle and relief angle during deburring. The efficiency of the tool in terms of deburring speed is verified by a set of deburring tests on Al6061-T6. The measured depth of cut on the burr edge confirms the complete removal of burrs. 相似文献
12.
通过建立细长轴对称式双刀车削模型,推导出刀具加工点理论让刀量公式。对细长轴双刀车削进行静力学仿真分析,得到刀具在加工点让刀量数据。考虑到刀具径向力与背吃刀量的关系,以及引起刀具让刀量误差的其他因素,在刀具加工点理论让刀量公式中引入修正系数k,对仿真曲线和预测理论曲线进行对比分析,确定修正系数k的大小。最后进行数控车削试验,结果表明:将优化后的理论让刀量公式作为补偿函数车削细长轴能显著提高其加工精度。 相似文献
13.
针对航空发动机涡轮轴-轴盘对接装配过程中因人工操作引起的对接点位置精度低、装配稳定性差以及效率低等问题,设计一套集测量、调姿、装配于一体的闭环控制系统。利用高精度测量探头对涡轮轴与轴盘内外表面位置进行测量。通过空间几何和坐标转换原理对涡轮轴和轴盘的姿态分别进行调整,保证涡轮轴面和轴盘轴面处于同一平面、涡轮轴轴心和轴盘轴心共线。针对测量过程中存在的误差,将装配过程中运动轴伺服参数实时反馈至PC端,利用PC端与控制器全闭环实现装配过程位置的检测和调整;调姿装配结束后,利用高精度传感器测量涡轮轴与轴盘对接处缝隙值并与目标值对比,以保证装配精度。通过试验对测量、调姿、装配过程进行验证,得到装配缝隙值小于2 mm。试验结果表明:涡轮轴与轴盘表面位置测量准确度高,对接装配过程稳定性强,测量装配精度满足实际要求,该系统具有一定应用价值。 相似文献
14.
15.
Klaus Weinert Shangjian Du Patrick Damm Marc Stautner 《International Journal of Machine Tools and Manufacture》2004,44(6):216
To enhance the accuracy of five-axis milling processes, a simulation based NC-path optimization provides an efficient approach. The key to a reliable simulation of cutting processes is the accurate geometric modeling of engagement conditions and the resulting workpiece geometry. The article proposes a novel approach to calculate the cutter profile for modeling swept volume with respect to trajectory of the cutter. In terms of envelope theory, a swept volume is created as a NURBS surface representation. The proposed method is robust and the results can be applied to material removal simulations based on Boolean operation, as well as discrete methods. 相似文献
16.
17.
Inserted cutters are widely used in roughing and finishing of parts. The insert geometry and distribution of inserts on the cutter body vary significantly in industry depending on the application. This paper presents a generalized mathematical model of inserted cutters for the purpose of predicting cutting forces, vibrations, dimensional surface finish and stability lobes in milling. In this paper, the edge geometry is defined in the local coordinate system of each insert, and placed and oriented on the cutter body using the cutter's global coordinate system. The cutting edge locations are defined mathematically, and used in predicting the chip thickness distribution along the cutting zone. Each insert may have a different geometry, such as rectangular, convex triangular or a mathematically definable edge. Each insert can be placed on the cutter body mathematically by providing the coordinates of the insert center with respect to the cutter body center. The inserts can be oriented by rotating them around the cutter body, thus each insert may be assigned to have different lead and axial rake angles. By solving the mechanics and dynamics of cutting at each edge point, and integrating them over the contact zone, it is shown that the milling process can be predicted for any inserted cutter. A sample of inserted cutter modeling and analysis examples are provided with experimental verifications. 相似文献
18.
19.
叶片是航空发动机关键零部件之一,具有复杂的几何形状、极高的几何精度和表面质量要求.其中,叶片进排气边作为影响整机性能的关键区域,其较小的半径尺寸、急剧的曲率变化使得数控自动化抛光难以实现.为此,提出一种采用电镀超硬磨料柔性抛光轮定轨迹抛光的方法.通过优化线速度和预压量等抛光工艺关键参数,建立相应的抛光去除量和表面粗糙度... 相似文献