METHOD FOR THERMAL TREATMENT OF HALF-FINISHED ABRASIVE TOOLS ON ORGANIC THERMOSETTING BINDERS

摘要

FIELD: technological processes. ^ SUBSTANCE: group of half-finished abrasive tools prior to thermal treatment is placed into thermally insulated steam and gas permeable radiolucent thermostat. Full cycle of mentioned half-finished articles thermal treatment is carried out. Cycle includes stages of preliminary heating and hardening of half-finished items group in microwave field of SHF-chamber with frequency of 2,450 MHz for abrasive tools with thickness of up to 100 mm and frequency of 890...915 MHz for abrasive tools with thickness of more than 100 mm to achieve temperature of organic thermosetting binder complete polymerisation with further maintenance at this temperature. In process of SHF thermal treatment volatile substances are forcedly and uniformly removed from free volume of thermostat through slots arranged in front and back walls of thermostat. Possibility for vapours of volatile substances to be saturated is eliminated with preservation of maximum possible effect of thermostat working area thermal insulation effect and provision of half-finished items temperature difference that does not exceed ±10% of its average level inside thermostat. ^ EFFECT: improved performance characteristics of device.