龙门剪床一般都在后面设有下料定位装置,成批剪切图1所示零件时,需在剪床后面多次定位。而在用后定位下料过程中,当薄板(0.5～2mm)伸出下刀片约250～350mm尚末到达定位杆时,就会因自重而变形,造成尺寸超差。为此,设计了一套双导轨平托式前定位装置,安装在Q11-4×2000型的龙门剪床上,经实际使用证明,产品能达到设计要求。 Gantry shears are generally located in the back of the material positioning device, batch cutting Figure 1 shows the parts, the need to locate multiple times behind the shears. In the process of using the positioning and blanking, when the sheet (0.5 ~ 2mm) extends out of the lower blade about 250 ~ 350mm yet reach the positioning rod, it will be deformed due to self-weight, resulting in size tolerance. For this reason, a set of double guide rail Pivot front positioning device is designed and installed on the Q11-4 × 2000 gantry shear bed. The actual use proved that the product can meet the design requirements.