2results about How to "Reduce the roughness value" patented technology

The invention discloses an ultrasonic vibration auxiliary milling method for a Ti2AlNb material, and belongs to the technical field of alloy material machining. The method comprises the following steps: removing a surface oxide layer from a Ti2AlNb material piece; the Ti2AlNb material piece is subjected to longitudinal-torsional composite ultrasonic vibration auxiliary milling machining; wherein the longitudinal-torsional composite ultrasonic vibration is used for assisting milling, and the vibration parameters of the longitudinal-torsional composite ultrasonic vibration are as follows: the torsional vibration tangential line amplitude is 4-8 microns, the ultrasonic frequency is 20-30 kHz, the longitudinal vibration amplitude is 3-6 microns, and the phase difference is 90 degrees. According to the method, the Ti2AlNb material piece with the machining surface small in roughness value and large in residual compressive stress value is finally obtained, harmful tensile stress of the machining surface obtained through pure milling machining is converted into compressive stress, generation of microcracks can be effectively restrained, and the service life of the material is prolonged.

The application discloses a cord fabric unwinding and wrinkle removing device and a production method of an unwinding roller, and belongs to the technical field of cord fabric manufacturing. The unwinding and wrinkle removing device comprises an unwinding roller, a main hot moistening positioning roller and an auxiliary hot moistening pressing roller. Cord fabric on a cord fabric winding disc sequentially passes through the unwinding roller, the main hot moistening positioning roller and the auxiliary hot moistening pressing roller. The unwinding roller is used to apply a force to the cord fabric, so that the cord fabric is stretched along the width direction of the cord fabric. The main hot moistening positioning roller is used to moisten and fix the unwound cord fabric. The auxiliary hot moistening pressing roller is used to assist in moistening the cord fabric. The unwinding and wrinkle removing device integrates unwinding, setting and moistening. When the cord fabric is unwound, the unwound state can be fixed, and the cord fabric surface can be smoothed and wrinkle-free in time through moistening, so that the cord fabric is prevented from being stained with glue due to wrinkles.