A manufacturing process of a commutator

Abstract

The invention discloses a manufacturing technology of a commutator. (1) Copper wires are rolled, pulled and punched to form commutator segments, and hook grooves are punched in the formed commutator segments; (2) the commutator segments are arranged in a plastic sleeve in sequence; (3) the commutator segments are put into a commutator forming die after arrangement of the commutator segments is completed, bakelite powder is punched into the commutator forming die, and the commutator segments and the bakelite powder are compressed to form the commutator; (4) the formed commutator is taken out, and the plastic sleeve is removed; (5) finally hooking is carried out on hook pins of the formed commutator. According to the manufacturing technology of the commutator, multiple steps for machining the commutator are reduced, production efficiency is improved greatly, cutting technology influences are gotten rid of, the internal stress of the commutator is small, fastness is strong, and the service life is long. In addition, due to the fact that cylindrical turning is not carried out, the thickness of the commutator segments is even, dynamic balance is good, and therefore the service life is prolonged.

Description

technical field [0001] The invention relates to a manufacturing process of a motor commutator. Background technique [0002] The manufacturing process of the commutator is very proficient, the main process includes the following steps, 1) Rolling and punching the copper wire to make the commutator piece; 2) Arranging the commutator piece in the plastic sleeve, the plastic sleeve makes the commutation piece The pieces are arranged in a cylindrical shape, and there are gaps between the commutation pieces, so there is no need to mill the mica groove; 3) Put it into the commutator forming mold, pour in bakelite powder, and press the commutator piece and bakelite powder; 4) Take out the formed commutator and remove the plastic sleeve; because the existing plastic sleeve for sheet arrangement cannot seal the hook feet of the commutator piece, the hook feet will not be punched out when punching the commutator piece, Otherwise, bakelite powder will stick to the hook feet of the com...

AI Technical Summary

Problems solved by technology

[0002] The manufacturing process of the commutator is very proficient, the main process includes the following steps, 1) Rolling and punching the copper wire to make the commutator piece; 2) Arranging the commutator piece in the plastic sleeve, the plastic sleeve makes the commutation piece The pieces are arranged in a cylindrical shape, and there are gaps between the commutation pieces, so there is no need to mill the mica groove; 3) Put it into the commutator forming mold, pour in bakelite powder, and press the commutator piece and bakelite powder; 4) Take out the formed commutator and remove the plastic sleeve; because the existing plastic sleeve for sheet arrangement cannot seal the hook feet of the commutator piece, the hook feet will not be punched out when punching the commutator piece, Otherwise, bakelite powder will stick to the hook feet of the commutator piece when filling with bakelite powder, and the bakelite powder needs to be cleaned again, which will not only increase the cleaning process, reduce production efficiency, but also damage the commutator piece; The existing plastic sleeve only plays the role of facilitating the arrangement of the commutator segments, and cannot ensure that the commutator segments are arranged in a circle, nor can they position the commutator segments, so the commutator segments cannot be positioned when pressed with bakelite powder. To maintain an absolute circular shape and poor concentricity, the formed commutator cannot meet the standard requirements. Therefore, 5) the process of turning the outer circle and 6) the process of milling the hook foot, that is, turning the commutator into a cylindrical shape to make it The concentricity reaches the standard; finally 7) the hook

The manufacturing process of the existing commutator is not only cumbersome, but also the internal stress of the commutator will be increased after multiple cutting processes such as milling the hook groove and turning the outer circle, which will reduce the strength of the commutator and affect its service life. The outer circle leads to uneven thickness of the commutator, which affects the strength of the commutator, reduces the dynamic balance of the commutator, and also affects the service life of the commutator

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