In recent years, five-axis CNC machining centres have made a big splash in the machining field, winning over many manufacturers with their high efficiency and quality features. Five-axis machine tools, that is, on the basis of the traditional X, Y, Z three linear moving axes, add two rotary axes

In a variety of mechanical structures, bolted and welded connections are the two most common forms of connection. This paper mainly through the bolt and welding characteristics to the comparative analysis, summarise the advantages and disadvantages of the two main connection.