中国地质大学长城学院本科毕业设计外文资料翻译系 别： 工程技术系 专 业：机械设计制造及其自动化 姓 名： 牛建辉 学 号： 05211613 2015年 4 月 27 日Bending machine structure designingWith bending machine control system development, its function more and morecomplete, operating more and more convenient. Although with numerical control system for the control system of bending machine production efficiency, and will be high quality also is very good, but these for copper platoon and LvPai bend it, the consumption of cost is higher, solid we take the common design structure, using hydraulic control system. Such not only can satisfy the production conditions also can save money. The knee bend machine-packed includes the support, the work table and the clamp board, the work table puts on the support, the work table by the foundation and the clamp constitution, the foundation is connected through the hinge and the clamp board, the foundation by the place shell, the coil and the lap is composed, the coil puts in the place shell hollowly, the hollow crown duplicate has the lap. When use by wire to coil circular telegram, after the circular telegram, has the attraction to the clamp, thus realizes to between the clamp and the foundation the thin steel plate clamp. Because has used the electromagnetic force clamp, causes the clamp to be possible to make many kinds of work piece requests, moreover may to have the sidewall work piece to carry on the processing, in the operation is also very simple. Anticipated customer before payment, should better flexure variable which, components aspects and so on bevelling radius from machines final use, the known machine possibly occurs consider carefully first buys anything. workpiece The first one is worth considering important item is your production parts, the main point is buying a can finish machining task and workbench shortest, the minimum number of machines. Consider carefully material and the largest machining grades thickness and length. If a majority of work is thickness gauge, maximum length 16 10 inches of low carbon steel, so free bending force not greater than 50 tons. However, if engaged in a lot of bottom of dies.the forming, may be considered a 150 tonnage of machine tools. Ok, assuming the thickest material is 1/4 inch, 10 feet free bending need 165 tons, bottom dies.the bending (adjusted bending) will need at least 600 tons. If a majority of workpiece is 5 feet or shorter, number almost halve, which will greatly reduce the acquisition cost. Parts to determine the length of new machines specification is quite important. Flinch change In the same load, 10 feet machine table and the slider appear nao variable is 5 feet machine 4 times. This means that shorter machines need less gaskets adjustment, can produce qualified parts. Reduce gaskets adjusting preparation time shortened again. Materials brand is also a key factor. Compared with low carbon steel, stainless steel need load usually adds about 50 percent, while most of the brand of soft aluminum reduce 50%. You can always from bending machine manufacturers get machine tons, this table shows in decimal different thickness and different materials under each foot length required number estimation. Parts of the bending radius Using free warped, bending radius is concave die from the mouth 0.156 times. In a free bending process, dies.the openings from should be metal material thickness of eight times. For example, using 1/2 inch opening from forming 16 gauge, low-carbon steel parts bending radius about 0.078 inches. If the bending radius nearly small to material thickness shall be bottom of dies.the forming. However, a bottom concave die forming equal pressure than free bending big 4 times the left and right sides. If less than bending radius material thickness, should be used in front-end fillet radius of less than material thickness of the punch, and turn to embossing bending method. So, need 10 times in liberty bending stress. Free bends, convex molding and according to 85 dies.the or less than 85 processing (smaller as well). Using this group of mould, notice the punch and concave die in stroke at the bottom of the gap, and cover springback and make the materials about 90 to keep excessive flex. Usually, free bending die in new bending machine produces the springback Angle acuities 2 , bending radius equal distance of dies.the openings 0.156 times. For a bottom dies.the bend, mould Angle general for 86 90 . In the end, the concavo-convex trip mode between due a slightly higher than the material thickness clearance. Forming Angle to improve, because the number of dies.the bottom bend large (about four times for freedom bending), reduce the bending radius range usually cause rebound of stress. Stamped with a bottom bend dies.the same, just to bend the punch the front-end processing became need bending radius, and stroke bottom clearanc