The invention discloses a method and a device for variable material conveying of
metal coil
numerical control punching. The method comprises the following steps of firstly, conveying a to-be-processed
metal coil from one end of a transverse fixing material carrying table to the other end through a transverse conveying roll
assembly, upwards wounding over a T-shaped turning guide rod, changing the direction by 90 degrees, conveying to a transverse slide material carrying table, and conveying to a
punch press through a longitudinal conveying roll
assembly to complete the longitudinal material conveying; when the to-be-processed
metal coil is transversely conveyed relative to the
punch press, enabling the transverse slide material carrying table to drive the to-be-processed metal coil to transversely swing. The device mainly consists of an uncoiling
machine, the transverse fixing material carrying table, the transverse slide material carrying table, the transverse conveying roll
assembly, the longitudinal conveying roll assembly and the T-shaped turning guide rod, wherein the uncoiling
machine is vertical to the
punch press, the transverse fixing material carrying table is opposite to the uncoiling
machine, and the transverse slide material carrying table is arranged above the transverse fixing material carrying table. The method and the device have the characteristics that the structure is simple, the working is stable, the operation is accurate, and the two-dimensional
numerical control punching of the wide metal coil without mutual interference between transverse material conveying and longitudinal material conveying is realized.