Transformer iron core and positioning clamp for stacking iron core

The iron core comprises iron yokes which are arranged in parallel, the end portions of the same sides of the iron yokes are connected through side columns, the iron yokes and the side columns form a quadrilateral structure, and half holes are formed in the outer edges of the connecting ends of the iron yokes and the side columns respectively. The positioning clamp structurally comprises a clamping sleeve assembly, the clamping sleeve assembly is provided with attaching parts matched with the two side edges of the iron core corner, the attaching parts are magnetic, the inner side of each attaching part is provided with a positioning column, and the positioning columns are matched with the half holes. Therefore, the process holes are formed in the corners of the iron core, the silicon steel sheets are well butted at the joints of the corners while the silicon steel sheets are positioned in the iron core stacking process, the stacking efficiency is ensured, the stacking quality is optimized, the loss of the iron