【正文】 The buyer is expected in payment, best first before the final purpose, from the machine known possible nao variables, parts of the bending radius etc carefully consider what to buy.WorkpieceThe first consideration is important to you is to buy a key parts, finish machining task and workbench shortest, number of minimum machine.Consider carefully material and thickness of the biggest brands and length. If most of the work is thickness gauge, 16 maximum length ten feet, bending strength low need more than 50 tons. However, if in the bottom of forming, may be considered a 150 tons of machine tools. Assuming the thick material is 1/4 inch, 10 feet to 165 tons, bending and bottom bend (correction need at least 600 tons of bending). If a majority of workpiece is 5 feet or shorter, number, thus greatly reduced almost halve the purchae cost. To determine the length of the new machine parts of the specification is quite important.Flexible variableIn the same load, 10 feet machine table and slider appear variable is 5 feet of 4 times. This means that shorter machine requires less gasket, can produce qualified parts. Reduce gaskets adjustment and shorten the time.Material is one of the key factors. Grades Compared with low carbon steel, stainless steel to load, and usually increased by 50%, most grades of soft aluminum is reduced by 50%. You can always from bending machine manufacturers of get machine, the display in the decimal tons of different thickness and different materials under each foot length required number estimation.Parts of the bending radiusUsing free bending, bending radius of openings for times. In the process of bending die from should open, the thickness of metal material is 8 times. For example, using 1/2 inch opening from forming and gauge lowcarbon steel, parts of the bending radius about inches. If the bending radius nearly to the thickness shall be bottom of forming. However, the forming of bottom pressure is four times as big bending.If the bending radius, less than material thickness should be used in front of less than material thickness round angleradius punch, and turn to stamping bending method. So, need 10 times in bending stress.Free bends, punch and die by 85 ? or less than 85 176。 processing (smaller as well). Using this group of mould, note the punch and die in stroke, and enough space at the bottom of the springback pensation and maintain material about 90 176。. Usually, the bending free in new bending machine produces the springback Angle than 2 176。, bending radius equal to the distance openings.For bottom bend Angle of monly, mould for 8690 176。. At the bottom of the trip, intensive between due a slightly higher than the thickness of the material. Forming Angle to improve, because the number of bottom bend large (about 4 times of bending free), and reduced the bending radius scope of stress caused by the springback normally.Pressure seal bending and bottom bend, just the same punch to the frontend processing to the bending radius, and stroke bottom clearances between less material thickness. Due to exert enough pressure (about 10 times the bending is forcing punch frontend contact materials, basically avoided the rebound.In order to select the lowest number specification, the best material thickness for more than the bending radius, and plan for as far as possible using free bending method. Bending radius, often do not affect the quality and to use.PrecisionBending accuracy is a need to reconsider the factors, the factors, decision you need to consider a CNC bending machine or manually controlled bending machine. If the bending accuracy 177。 1 176。 and cannot be changed, you must focus on CNC machine.CNC bending machine slider repeat precision is 177。 inches, forming precision Angle must use the accuracy and good mould. Hand point bending machine slider reproducible accuracy 177。 inches, and using the appropriate mold conditions generally produce 177。 2 ~ 3 176。 deviation. In addition, CNC bending machine for fast loading mode, when you need to prepare many small batch parts bending, which is considered one of the unquestionable.MouldEven if you are full of mould, don39。t think shelves in the mould suitable for the new machine. Must be checked every one of the mold, the measurement method is worn the punch to the front stage shoulder length and platform between the shoulder length.For general mold, each feet in 177。 deviation, and total length inch deviation less than 177。 inches. For fine grinding, each foot precision mould should be 177。 inches, total precision not greater than 177。 inches. The best mould for CNC bending machine, conventional mould for manual bending machine. Curved piece lengthAssume a 10 feet along the gauge lowcarbon steel plate bend 1090 176。, bending machine probably must exert extra pressure plate top tons, and operator must for 280 pounds to prepare straight down. Make the parts may need several strong workers even a crane. Bending machine operators often require bending long side parts, but aware of how they work.Now there is a feeder suitable for this job in the workshop, the device can according to new and old machine needs to improve. Use this device, forming long side parts need one operator.Bending machine usageAccording to the mon hydraulic bending machining Q235 sheet to do simple introduction. first is the switch on the power, on the control panel, click open keys switch pump startup, so you can hear the sound of the pump rotation. This machine is not action travel adjustment, bending machine must pay attention to adjust, be sure to bend in the trial. Bending machine mould downward to the bottom must ensure a thickness of clearance. Otherwise it will cause damage to the mold and the machine. The trip is adjusting quick adjustment of manual and electric stomach., should choose to notch monly the thickness of the width of the slot eight times. If the sheet