Tail Forming Method of Flat Copper Wire Wave Winding with Small Span, Large Section and Small End Stretching and Twisting Nose

Abstract

The invention discloses a method for forming the tail of a wave winding of flat copper wire with a small span, large cross-section and small end stretching and twisting nose, which realizes high-efficiency overall folding of the tail of a flat copper wire wave winding with a small span, large cross-section and small end stretching and twisting nose Bending forming; through the combination of the bending positioning column at the end of the coil and the different connecting screw holes on the table, the forming of the outer splayed tail of coils of different sizes is realized, especially the L-shaped clamping plate is set at the bending place to bend the tail coil. The outward bulging during bending can effectively limit the position, which solves the defect of outward convex deformation at the bending part of the tail; in addition, the ingenious combination of the coil bending positioning column and the roller bending wrench of the present invention makes the wrench The upper roller squeezes the coil during rolling, realizing the damage-free bending and forming of the wave winding bend. The invention greatly improves the forming efficiency of the tail of the multi-layer stacked flat copper wire wave winding, protects the copper winding from being damaged during forming to the greatest extent, and greatly improves the forming quality of the tail coil.

Description

technical field [0001] The invention relates to a winding tool for a motor winding, in particular to a tail forming tool and a winding forming method for a flat copper wire wave winding with a small-span and large cross-section and a small-end extended twist nose. Background technique [0002] The windings in the stator and rotor of some motors are designed as flat copper wire wave windings. There is a twist nose at the center of the head of the flat copper wire wave windings. The flat copper wires put together, the straight section of the upper coil and the straight section of the lower coil are arranged parallel to each other, but not in the same plane, and the tail of the winding is set in a figure-eight shape with an outward opening; the wave winding coil is formed by twisting The nose realizes the reverse conversion between the upper layer coils arranged in multi-layer stacks and the lower layer coils arranged in multi-layer stacks, that is, the upper layer flat copper ...

AI Technical Summary

Problems solved by technology

[0007] The general idea of ​​the present invention: design a combined tooling that can satisfy the forming of each part of the flat copper wave winding, and achieve the purpose of conveniently realizing the overall one-time complete molding of the flat copper wave winding; before using the tooling of the present invention, it is necessary to first Wind the flat copper wire into a stacked shuttle shape with 5-11 layers, cut off the arc at one end of the shuttle coil to form a shuttle U-shaped coil with one end open, and then close the shuttle-shaped U-shaped coil The arc part of the end is inserted into the fixing fixture of the special mold, and the two straight sides of the shuttle-shaped U-shaped coil are held by both hands and separated to the two sides to form a figure-eight coil with a twisted nose; The “eight-shaped coil” is the initial processing coil. Through this tooling, it is processed into a flat copper wire wave winding with a small span, a large cross-section, and a small end with a twisted nose; the tooling of the present invention can be divided into the head forming tooling part of the wave winding. , the straight line side shaping and fixing tooling part and the outer figure-eight tail forming tooling part of the wave winding; the head forming tooling part of the wave winding mainly uses the nose positioning splint and positioning pin to place the twisted nose of the figure-of-eight coil with twisted nose After clamping and fixing, for the bevel bend of the head of the upper coil, the bending is realized through the cooperation of the positioning column of the coil bend and the roller bending wrench; for the bevel bend of the head of the lower coil, through The combination of the positioning column at the bending position of the coil, the lower coil hypotenuse beam and the roller bending wrench realizes the bending. The inclination angle of the surface is the same, so that in the process of pressing down, the lower layer coil will not be damaged or deformed during the downward and inward bending process, which saves the coil head forming time, improves the coil forming quality, and reduces the labor cost. Labor intensity; wherein the straight line edge shaping and fixing tooling part, the present invention mainly sets two angle steel beams parallel to each other but not on the same horizontal plane, as a tooling mold for coil straight line edge shaping and fixing, on the inner side of the angle steel beam, Equipped with a flap-type eccentric wheel clamping mechanism, after turning up the flap-type eccentric wheel clamping mechanism, it is convenient to bend the straight side of the coil and connect it. After the mechanism is turned down, by rotating the eccentric wheel on the flap, the eccentric wheel drives the coil clamping block to protrude toward the angle steel beam, clamping the coil, realizing the shaping and fixing of the coil, and creating conditions for the bending of the coil tail; The tail forming tooling part of the wave winding, through the combination of the bending positioning column at the tail of the coil and the different connection screw holes on the table, realizes the forming of the outer eight-character tail of coils of different sizes, especially the L-shaped clip is set at the bending place The holding plate can effectively limit the outward bulging of the tail coil when it is bent, and solve the defect of outward protrusion and deformation of the tail bend; in addition, the coil bending positioning column of the present invention and the roller bending The ingenious combination of the wrench makes the roller on the wrench squeeze the coil during rolling, realizing the non-damage bending forming of the wave winding bending

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