3results about How to "Uniform roughness" patented technology

The invention discloses a grinding and polishing clamp for a plate-shaped tensile sample, and relates to the technical field of material processing engineering, the grinding and polishing clamp comprises a mounting disc, a liquid storage box and a clamping part; the mounting disc serves as a basic supporting part, a rotating shaft connector externally connected with a rotating driving device is arranged in the center of the mounting disc, the liquid storage box is arranged above the mounting disc, and the clamping part is arranged on the surface, away from the liquid storage box, of the mounting disc; the liquid storage box is used for storing and outputting polishing liquid or water, and the clamping part is used for clamping and positioning a plate-shaped tensile sample; according to the grinding and polishing clamp for the plate-shaped tensile sample, through the clamping block, the adjusting gasket and the anti-loosening structure, a thin plate sample is stably fixed, deviation and warping are avoided, meanwhile, the clamp can adapt to samples with different thicknesses and widths, the machining process is standardized, manual operation is replaced by automatic grinding, and the design of laminar flow liquid supply and flow adjustment of the guide plate is matched; the surface flatness and the roughness uniformity are ensured, the scale distance section machining area is accurately locked, and the characterization requirements of SEM and EBSD are met.

This invention is a steel billet grinding process with a constant grinding wheel linear speed. First, the steel billet is automatically fed, positioned, and locked. A laser rangefinder detects the actual length of the steel billet and calibrates the grinding wheel to align with the billet's length center. Then, the grinding wheel is controlled to apply pressure and adhere to the steel billet, driving the billet to translate and complete the grinding of both sides. During the grinding stage at the billet's ends, the speed and pressure are automatically reduced to avoid over-grinding and sharpening at the ends. A trolley tilting mechanism rotates the billet 45° multiple times, cyclically grinding all sides and edges of the billet, using a repeated grinding method with decreasing feed depth to ensure grinding accuracy. Simultaneously, photoelectric switches on both sides of the grinding wheel monitor the wear on the outer circumference of the grinding wheel in real time, dynamically adjusting the grinding wheel motor speed to maintain a constant grinding linear speed, and simultaneously calibrating the distance between the grinding wheel and the billet to stabilize the grinding pressure. This invention effectively ensures uniform overall grinding quality of the steel billet and improves the grinding accuracy and stability of the billet's sides and edges.

The application discloses a preparation process and system of an ultralow-temperature heat-conducting basalt fiber yarn, and the preparation process comprises the following steps: after coating particles enter a target area, the coating particles float; the target area forms a floating area; the basalt fiber yarn moves through the floating area, and the coating particles in the floating area are adhered to the basalt fiber yarn; and after drying, a heat preservation layer is formed on the surface of the basalt fiber yarn. The application can form a heat preservation layer on the surface of the moving basalt fiber yarn, and a high-voltage electric field does not need to be formed between the basalt fiber yarn and the coating particles in the coating process, thereby avoiding a safety hidden danger caused by a continuously changing electric field caused by the continuously moving basalt fiber yarn, and improving the safety of the preparation process.