Manufacturing of segmented wind turbine blade

A method of manufacturing a wind turbine blade having a profiled contour including a pressure side and a suction side, and a leading edge and a trailing edge with a chord having a chord length extending therebetween, the wind turbine blade extending in a spanwise direction between a root end and a tip end, the method comprising:

• manufacturing a pressure side shell half and a suction side shell half over an entire length of the wind turbine blade;
• arranging a spar structure (62) within one of the pressure side and suction side shell halves, the spar structure (62) comprising a first part (64) and a second part (66), the first part (64) and the second part (66) being releasably coupled to each other when arranged within one of the pressure side and suction side shell halves, wherein the first part (64) comprises a sheath member for at least partly enclosing the second part (66), wherein the second part (66) of the spar structure (62) comprises a spar beam or a spar box, wherein the sheath member is box-shaped, and wherein the sheath member is a conductive sheath member which is part of a lightning protection system of the wind turbine blade;
• closing and joining the pressure side and suction side shell halves for obtaining a closed shell;
• cutting the closed shell along a cutting plane (69) normal to the spanwise direction of the closed shell to obtain a first blade segment (68) and a second blade segment (70), each of the first and the second blade segments comprising part of the pressure side shell half and part of the suction side shell half, wherein the spar structure (62) extends across the cutting plane (69), and wherein the second part (66) of the spar structure (62) extends beyond the second blade segment (70) into the first blade segment (68);
• uncoupling the first part (64) of the spar structure (62) from the second part (66) of the spar structure (62);
• separating the first blade segment (68) from the second blade segment (70);
• and
• joining and sealing the first blade segment (68) to the second blade segment (70) for obtaining the wind turbine blade.