Process for machining special winding gears for transformers with roll iron cores

Abstract

The invention discloses a process for machining special winding gears for transformers with roll iron cores. The process includes steps of selecting materials; machining outer circles and end surfaces; machining inner circles; drilling holes, tapping threads and milling the holes and grooves; hobbing gears; carrying out high-frequency induction heat treatment on the gears; grinding the gears; linearly cutting the gears; positioning, clamping and machining the gears, and the like. The process for machining the special winding gears for the transformers with the roll iron cores has the advantages that positioning triangles are arranged on workpieces, each workpiece is cut into halves, and accordingly the special winding gears and frameworks of winding machines can be conveniently mounted and conveniently assembled; T-shaped bosses are arranged on the workpieces by means of machining, low-voltage line holes and oblong slotted holes are formed in the workpieces by means of machining, and accordingly winding can be facilitated to a great extent; the integral workpieces are made of number-45 steel, high-frequency induction heat treatment and grinding treatment are combined with each other, accordingly, the hardness, the abrasion resistance and the precision of the integral gears can be guaranteed, and the gears are long in service life.

Description

technical field [0001] The invention relates to the field of processing winding devices for wound iron core transformers, in particular to a processing technology for winding gears specially used for wound iron core transformers. Background technique [0002] One of the key technologies of wound core transformers is how to conveniently and quickly wind coils on closed three-dimensional wound core transformers. The existing three-dimensional wound core transformer coil winding technology is to install a positioning device with a winding gear on the core column of the three-dimensional wound core, and then place cardboard or epoxy cloth board on the edge of the gear. [0003] The disadvantage of this winding method is that the installation of the positioning device is relatively high, and the concentricity of the positioning devices at both ends must be ensured to be high, otherwise the iron core will be easily rubbed during winding, resulting in the failure to complete the wi...

AI Technical Summary

Problems solved by technology

[0003] The disadvantage of this winding method is that the requirements for installing the positioning device are relatively high, and the concentricity of the positioning devices at both ends must be ensured to be high, otherwise the iron core will be easily rubbed during winding, resulting in the failure to complete the winding, so the installation time is longer

The second disadvantage is that if cardboard is used as the inner support of the winding, the friction of the core column is also prone to occur during winding. If there is a problem during winding, it cannot be returned and rewound, and the entire coil must be rewound.

Moreover, in the relatively humid environment in the south, the cardboard is easy to soften, causing the gears to fail to rotate, which will also affect the winding of the coil, and even cause the entire coil to be scrapped.

Therefore, the production efficiency of this method is not high, and problems are prone to occur in the winding process and cause waste.

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