Fastening tool, a bolt assembling device and a method for assembling a high pressure compressor rotor

A fastening tool characterized in comprising:

• a base part, provided with a top part guiding portion, a pressing part guiding portion and a transmission part guiding slot;
• a top part, at least part of which is placed in the base part and provided with a top part guiding matching portion, wherein the top part guiding matching portion engages the top part guiding portion in a sliding fit;
• a pressing part, provided with an inclined transmission surface and a pressing part guiding matching portion, wherein the pressing part guiding matching portion engages the pressing part guiding portion in a sliding fit to guide the sliding of the pressing part;
• a lever, provided with a first end, a second end and a hinging portion between the first end and the second end, wherein the hinging portion is hinged to the base part;
• a transmission part, engaging the transmission part guiding slot in a sliding fit;
• wherein the transmission part is driven to slide by the inclined transmission surface of the pressing part when the pressing part is driven to slide towards a fastening direction, the lever is driven to rotate as a force is applied by the transmission part to the second end of the lever, then the top part is driven to slide outwards the base part as a force is applied by the first end of the lever to the top part, so as to push a workpiece upwards;
• due to a reaction force acting on the inclined transmission surface by the transmission part and a friction between the pressing part guiding matching portion and the pressing part guiding portion, the pressing part remains to be self-locked by friction, which can constrain the sliding fit between the pressing part guiding matching portion and the pressing part guiding portion, and the slided top part is locked.