Method for improving hot saw cutting efficiency of bar metal saw

The invention relates to the field of bar machining, in particular to a method for improving the hot sawing efficiency of a bar metal saw, which comprises the following steps: determining the initial sawing speed VDi of the metal saw based on the diameter Di of a to-be-cut bar; the metal saw carries out sawing at the initial sawing speed VDi, after the metal saw makes contact with the to-be-cut bar, the sawing speed vDI is adjusted in real time based on the current current I of a sawing motor, the current sawing temperature T and the diameter Di of the bar, and the bar is sawn; and in the bar sawing process, after the current I of the sawing motor reaches the preset proportion of the rated current for the first time, the sawing speed vDI is adjusted in real time based on the strategy that the current I of the sawing motor is inversely proportional to the sawing speed vDI. The problem that in the existing production process, due to the fact that the service life of a metal saw blade of a hot saw is short, the