Inner arc positioning block and machining method thereof

The invention relates to an inner arc positioning block and a machining method thereof. According to the inner arc positioning block and the machining method thereof, as for the structure characteristics and machining condition of the inner arc positioning block, the size machining precision of the inner arc positioning block is ensured, and structural deformation of the inner arc positioning block is prevented. The inner arc positioning block comprises a block body which is a long-strip-shaped block body, the upper surface of the block body is an upwards-protruding R-shaped arc surface, and afirst through groove and a second through groove are formed in the upper surface of the block body in the length direction of the block body sequentially. The inner arc positioning block and the machining method thereof are used for the field of machining of steam turbine working parts. 种内弧定位块及其加工方法，它涉及种内位块及其加工方法。本发明为是针对内弧定位块结构特点及加工状况，为保证该部件尺寸加工的精度，防止其结构变形，发明了种内弧定位块及其加工方法。本发明保护的种内弧定位块及其加工方法，所述种内弧定位块包括块体，所述块体为长条形块体，块体的上表面