Method for processing commutator strengthening ring

Abstract

This invention relates to a processing method for strengthening rings of commutators characterizing in including the following steps: 1, preparing a resin glue, 2, dipping it in the glue, 3, removing the organic solvent, 4, installing a mold: circling a dried product around a yarn drum then winding the product on a die bar with a winding machine, 5, solidifying: baking the die bar in step 4 in an oven to solidify it, and the temperature is increased steadily in a ladder mode, the solidified temperature is 80-180deg.C and the solidified time is 5-10 hours, then the product is cooled to 60 deg.C or below to be taken out of the oven, 6, removing the mold, 7, removing the feather and processing the outer diameter, 8, rolling and cleaning it.

Description

technical field [0001] The invention relates to a plastic molding processing method, in particular to a processing method of a commutator reinforcement ring, and belongs to the technical field of plastic processing methods in the Ministry of Operations and Transportation. Background technique [0002] The commutator applied to the motor is generally composed of commutator pieces and mica pieces arranged at intervals. Its overall strength is poor, it is easy to deform during use, and it is difficult to withstand the huge centrifugal force generated by the motor under high-speed and high-temperature conditions. High scrap rate. For this reason, a kind of reinforcing ring applied on the commutator has been produced, which can improve the quality of the commutator and prolong the service life of the commutator. [0003] Initially, steel reinforcement rings were used, but their use was limited due to poor insulation. Now plastic reinforcement rings are commonly used. Plastic rei...

AI Technical Summary

Problems solved by technology

The tensile strength of the reinforcing ring prepared by the above method is 600-700 MPa in practical application, and the high temperature resistance can only be maintained at 200 ° C. The low temperature resistance of the product is easy to ooze out from the commutator and mica pieces of the commutator , forming the phenomenon of "glue seepage", which affects the operation of the motor

[0004] Due to the unsatisfactory tensile strength and high temperature resistance level, the Chinese invention patent application: 200610008263.2 discloses "Manufacturing method and special manufacturing equipment for high temperature resistant reinforcing ring for commutator" (publication number: CN1819369A). F51 epoxy resin, 504 curing agent and titanium dioxide are used as resin glue, SC8-960 alkali-free glass fiber yarn is used as impregnation, and combined with two gradient heating methods for baking, this method has the following disadvantages: first, use two times of baking , accelerates the aging of the product, shortens the service life of the product, and increases the waste of materials and energy; secondly, due to the use of punching punches to form semi-finished reinforcement rings, it is easy to cause product damage, increase stress, and reduce tensile strength

In addition, the same applicant disclosed a "Manufacturing Method of High Temperature Resistant Reinforcing Ring for Commutator" in Chinese invention patent application: 200410032030.7 (publication number: CN1585212A). The yarn is dipped in glue. The above-mentioned manufacturing method has improved the tensile strength and high temperature resistance of the product, but the improvement is limited. Moreover, due to the "adhesive bleeding" caused by the limitation of high temperature resistance, the scrap rate of the finished product is high.

With reference to the Chinese invention patent application again: 200610050356.1, discloses " a kind of manufacturing method of commutator reinforcing ring " (publication number: CN1585212A), uses phenolic resin as curing agent in this application, adopts air blast drying technology and The pre-winding technology improves the stability of the product and reduces the scrap rate, but the actual tensile strength of the product can only reach 1000Mpa and needs to be further improved

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