Preparation process of anti-DC transformer iron core

Abstract

The invention discloses a preparation process of an anti-DC transformer iron core. The preparation process comprises the following steps that a, mounting is conducted, specifically, the annular iron core is fixed to a clamp of an electric spark cutting machine; b, parameters of electric spark line cutting are set, specifically, the current is 1.5-3 A, the cutting speed is 1.0-1.5 mm/min, the diameter of an electrode wire is phi 0.16 mm, and the unilateral discharge gap is 0.01 mm; c, cutting is conducted, specifically, the electric spark cutting machine is started, thus a cutting tool conductscutting according to the linear trajectory passing through the circular center of the annular iron core, and an air gap is cut in the annular iron core; and d, an insulating sheet is mounted, specifically, the electric spark cutting machine is stopped, the annular iron core is removed from the clamp of the electric spark cutting machine, the insulating sheet with the required thickness is sandwiched in the machined air gap, and the size of the air gap is controlled. The preparation process is simple, the skill requirements for production workers are lowered, and the manufactured single-air-gap iron core has high consistency and is suitable for mass production.

Description

technical field [0001] The invention belongs to the technical field of current transformers, and relates to a preparation process of an anti-DC transformer iron core. Background technique [0002] The anti-DC transformer is a component that is used in conjunction with the watt-hour meter to measure electricity consumption through magnetic induction transmission. The anti-DC transformer is composed of iron core and winding. The general production process of the iron core in the anti-DC transformer is: use low-loss and high-permeability cold-rolled oriented high-quality silicon steel material to form a ring-shaped iron core, and then use wire cutting or grinding wheel Cut the annular iron core to make the iron core form two semicircles, and then glue the two semicircles together. The gap between the two semicircles is the air gap. This kind of iron core is called double air gap iron core. , by adjusting the size of the air gap, the performance index of the anti-DC transformer...

AI Technical Summary

Problems solved by technology

[0004] First, cut the annular iron core into two semicircles, and polish the incision. If the angles of the four surfaces are not aligned with the center of the circle after the cut surface is polished, the air gap width cannot be guaranteed at all, and the product performance and pass rate will be out of the question. Not to mention mass production;

[0005] Second, during production, the two s