Main points of single-phase ei transformer laminations operation

- Nov 10, 2018-

When operating single-phase ei transformer laminations, be familiar with the drawings and quality requirements and prepare the materials, parts, tools and tooling required in the lamination process; then transfer the unqualified waste sheets and clean the upper and lower splints with cloth. And put the clamps and insulation and sealing pieces, pay attention to check the upper and lower clamps and the upper end surface of the auxiliary channel steel on the same plane with the level ruler.


For single-phase ei transformer laminations, two-piece stacks are generally used, and the middle pillars are placed in the order of "middle, left, and right", and each three layers is a loop. When each stack is over one level or the thickness exceeds 15mm, apply copper or flatten the block with bakelite to knock the end face of the iron core once, reduce the seam, eliminate the jaggedness of the joint and the end face, and perform shaping and self-test.


Pay attention to the thickness of the sheet when laminating. When there is an uneven thickness of the iron chip, it should be evenly placed on the top of the pillar without the level to avoid the inconsistency of the stack thickness of the stem. If necessary, use three stacks for the thinner side. The thickness of each stage shall be in accordance with the thickness specified in the drawings when measuring with the caliper or steel ruler in the pressing state. Note that there is a certain margin, and the main thickness should have a positive deviation.


A better piece should be selected as the upper and lower cover sheets of each stage. Special care should be taken to ensure that the upper yokes must all use the better pieces. Each layer of creased or uncoated pieces must be separated by a good piece. When stacking to the last three stages, temporarily tighten the core and measure the total thickness with a caliper. Adjust the thickness of the last three stages according to the error, so that the total thickness is controlled within +2mm, and comprehensive inspection and shaping are performed.