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      Selection of bending die for bending machine

      CREATE_TIME:2018-6-25 VIEWS:4256
      The bending machine mold is generally composed of upper die, lower die, guide rail and die base.Angle 88 ° 90 ° and 30 ° three specifications (except special mould)Upper part: straight sword, straight sword (big, small) machete, goose neck (big, medium, small) machete, 30 degree sharp knife, flattening knife, simple mould, special mould, arc cutter, etc. Bottom part: dual V slot v4-v7 v5-v9 v6-v10 v7-v11 v8-v12 v15-v18, etc. Single V slot V4 V5 V6 V7 V8 V10 V12 etc. Part of mould base: single groove mould base and double groove mould base.There are three types of double slots: low station (55cm), middle station (75cm) and high station (135cm). Two, different materials because of its own structure is different, the tool used is not the same, the acid and alkali resistance, tensile strength, material hardness, tensile coefficient, plasticity are not the same.The choice of mold can be based on the machine pressure, structure, material, workpiece size, process requirements, surface treatment and other reasonable choice.In general, the width of the groove of the lower die is 5-6 times of the material thickness, not less than 4 times, not more than 8 times.Stainless steel select bottom die notch is material thickness of 6-8 times, not less than 5 times.Aluminum, copper optional lower die groove is 8-10 times the thickness of the material (should avoid bending surface crack). Three, the choice of upper die according to the workpiece to avoid, avoid nails, avoid nuts and other structures to make a reasonable choice, the workpiece needs to avoid the left and right can choose the curved knife or left and right ear knife, can also use special mold. The lower die according to the shape of the workpiece to choose the lower die or lower die reverse assembly, mainly used to avoid positions, avoid nails.When the size of the workpiece is smaller than the conventional size and the expansion size is small, under the premise of safe production, the method of bottom die eccentricity can be used to complete, the reasonable eccentricity is 1/4 of the width of V groove. When the ratio of v-groove to material thickness is 6 times, the workpiece expansion size shall be increased or decreased by 0.10mm for each unit (1mm) increase or decrease.There is no significant change when it increases to the limit. Special die selection according to its structure of its own shape, performance, size, appearance and the safety of the height of the machine, machine pressure and other reasonable use.The adjustment of the die is based on the size of the workpiece to adjust the size of the filling in the middle of the mold to control the size of the workpiece

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