【正文】 llowly, 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, ponents aspects and so on bevelling radius from machine39。s 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 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 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 times. In a free bending process, openings from should be metal material thickness of eight times. For example, using 1/2 inch opening from forming 16 gauge, lowcarbon steel parts bending radius about inches. If the bending radius nearly small to material thickness shall be bottom of 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 frontend 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 85 176。 or less than 85 176。 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 90 176。 to keep excessive flex. Usually, free bending die in new bending machine produces the springback Angle acuities 2 176。, bending radius equal distance of openings times. For a bottom bend, mould Angle general for 86 ~ 90 176。. In the end, the concavoconvex trip mode between due a slightly higher than the material thickness clearance. Forming Angle to improve, because the number of bottom bend large (about four times for freedom bending), reduce the bending radius range usually cause rebound of stress. Stamped with a bottom bend same, just to bend the punch the frontend processing became need bending radius, and stroke bottom clearances between less than material thickness. Due to exert enough pressure (about ten times) free bending force of the punch frontend contact materials, basically avoided rebound. In order to select the lowest number specifications, preferably for greater than material thickness of bending radius to plan, and as far as possible using free bending method. Bending radius is bigger, often do not affect the quality of into pieces and its future use. precision Bending accuracy requirement is a requires careful consideration。 it is this factors, decision you need to consider a CNC bending machine or manual control bending machine. If bending accuracy + 1 176。 and cannot be changed, you must focus on CNC machine. CNC bending machine slider repeat precision is + inches, forming the precise angular must adopt such accuracy and good mold. Manual control bending machine slider repeat precision for + inches long, and in adopting appropriate mold conditions will typically produce + 2 ~ 3 176。 deviation. In addition, CNC bending machine for quick pack mould ready, when you require bending many small batch spare parts, it is one of the unquestionable consider reason. mould Even though you have full shelf, do not assume that these mould moulds suitable for bought a new machine. Must be checked every one mold to wear, the method is to measure the punch frontend to Taiwan shoulder length and Taiwan shoulder length between. For general mold, each feet deviation should be in hospital inches, and total length deviation is not more than + inches. As for jingmo mould, each feet accuracy should be + inches, must not be more than the total precision CNC inches. The best jingmo mould in CNC bending machine, the conventional mould used to manually bending machine. Bending parts of side Hypothesis along one 5 x 10 feet of 1090 176。 gauge lowcarbon steel plate bend, bending machine probably must exert extra pressure plate tons top up, and the operator must for 280 pounds of straight edge whereabouts prepared. Make the parts may need several strong workers even a crane. Bending machine operator often require bending the lo