2results about How to "Reduce temperature stress" patented technology

The application provides a peanut drying machine and drying method based on microwave and hot air cooperation, wherein the drying machine comprises a drying main cabin, a multifunctional treatment cabin is connected to one side of the drying main cabin, and a driving device drives a material bucket to revolve around a hot air duct and revolve around a central axis of the material bucket. The material bucket is exchanged between the drying main cabin and the multifunctional treatment cabin through a transfer track, a plurality of microwave devices are arranged in the circumference of the shell of the drying main cabin, the microwave devices are used for emitting microwaves to dry the peanuts in the material bucket, and the outer part of the multifunctional treatment cabin is respectively connected with a feeding device and a discharging device. The application seamlessly integrates three key processes of preheating, drying and tempering in one equipment, realizes automatic switching through physical rotation, forms a complete closed-loop processing chain, greatly simplifies the production line and reduces the material turnover loss. Through the uniform temperature in the preheating stage and the slow recovery in the tempering stage, the color, flavor and nutritional ingredients of the peanuts can be better maintained.

This invention discloses a method for forming ultra-thin stainless steel pipe fittings, relating to the field of stainless steel pipe production and processing technology. It aims to solve the problems of branch pipe rupture and inner wrinkling during the current hydroforming process of ultra-thin stainless steel pipe fittings. The method includes: S1: billet preparation and pretreatment; S2: mold and sealing assembly; S3: staged collaborative forming; S301: pre-expansion and mold-fitting stage, where the internal pressure is increased to 0.8 MPa at a rate of 0.1 MPa / s and maintained stably; S302: main forming precise material replenishment stage, employing a gradient pressure increase strategy; S303: forming stress release stage, maintaining a stable internal pressure of 6-7 MPa for 10 seconds to ensure the billet completely fits the mold cavity, followed by a staged pressure relief method. This invention, through the application of a nano-lubricating film coating on the inner wall of the billet, low-temperature preheating treatment, stress-dispersing mold design, and the collaborative control of gradient pressure increase and real-time monitoring and material replenishment during the main forming stage, achieves effective dispersion of tensile stress concentration at the top of the branch pipe of the ultra-thin stainless steel pipe fitting and precise material replenishment, significantly reducing the risk of rupture.