液压式传动，有机动滑块行程调节结构和机动后挡料调节机构，带手动微调器，并有计数器显示数值，在上模上方装有斜楔式精度调整机构，以保证工作加工精度。

They adopt the hydraulic downstroke driving mechanism , and eauip with power adjusting devices for the ram stroke and the back gauge with a manual fineadjusting mechanism and a counterdisplaying the position of the siop . An adjusting device of wedge type s fixed on the top of upper tool to ensure precise bending work .