3results about How to "Guarantee internal quality" patented technology

This invention discloses a high-precision centering and positioning steam-water nozzle for dual-section continuous casting, belonging to the field of metallurgical equipment technology. It includes a nozzle body, a connector, and a nozzle head. The nozzle body has a cuboid structure with a groove for connection to the connector, and two slots within the groove. One end of the connector is detachably equipped with the nozzle head, and the other end has a locking nut and a positioning pin. The locking nut is fixedly fitted onto the end of the connector, and the connector is threadedly connected to the groove on the nozzle body via the locking nut. Two positioning pins are symmetrically positioned on the end of the connector with the locking nut, and these pins are adapted to the slots within the nozzle body. The nozzle has a simple structure, is easy to use, reduces maintenance time when changing sections, and accurately, efficiently, and conveniently meets the installation requirements for the vertical dimension and centering accuracy of the nozzle head relative to the billet end face during production of different sections, ensuring the uniformity of secondary cooling of the continuously cast billet during actual production.

The present application relates to the field of blade shaping, in particular to a low-cost shaping process method for titanium and titanium alloy blades, comprising the following steps: step one, scanning the incoming blade with a three-dimensional scanner to obtain the actual three-dimensional curve of the blade; step two, comparing the actual three-dimensional curve with the three-dimensional model of the blade; step three, marking the lack of value on the blade compared with the model; step four, drawing the deviation 0 line; step five, if the deviation 0 line is at the free end of the blade and is not a closed line, set the welding groove for shaping; step six, welding with welding wire; step seven, using a three-dimensional scanner to perform secondary scanning to obtain the corrected three-dimensional curve of the blade, comparing the corrected three-dimensional curve with the three-dimensional model of the blade, if they coincide, performing step eight, if they do not coincide, returning to step three; step eight, performing ray detection to exclude welding defects; step nine, heat treatment. The present application solves the problems that the blade type value cannot be measured and the shaping cannot be positioned, and corresponding shaping methods are adopted according to different situations.

The application discloses a casting method of a cast-state QT700-3 gear hub, and comprises the following steps: step one, determining the placing state of the gear hub in the sand mold as a placing mode with a small opening downward and a large opening upward; step two, determining that one gear hub is placed in the sand mold of each sand box; step three, determining a riser structure, the riser is designed to be integrated with the gear hub, the cross section of the riser extends along the large opening direction of the gear hub, and the cross section is Y-shaped; step four, determining that the parting mode of the gear hub during casting is horizontal parting along the top of the riser of the gear hub, and the sand mold is divided into two parts; and step five, determining a gating system structure, the sprue gate and the runner are located on the upper sand mold, and the position, at which the top of the sprue gate is connected with the outside of the mold, is a funnel-shaped top structure of the sprue gate. The casting method of the cast-state QT700-3 gear hub can reduce casting defects such as inclusions, pores and loose in the gear hub during the casting process, improves the internal quality of the gear hub, and meets the performance requirements of the QT700-3 material in the cast state.