4results about How to "Reduce flow stress" patented technology

This invention relates to the field of sheet metal processing equipment, and discloses a multi-source ultrasonic friction stirring processing device, including a fixed outer cylinder, a stationary shoulder, an ultrasonic probe, an amplitude transformer, a transducer, a first ultrasonic generator, a tool holder, a stirring head, an amplitude transformer transducer, a conductive slip ring, a second ultrasonic generator, and a feeding mechanism. The lower end of the fixed outer cylinder is connected to the stationary shoulder. The tool holder is located inside the fixed outer cylinder. The stirring head is connected to the lower end of the tool holder, and the lower end of the stirring head is flush with the lower end of the stationary shoulder. A stirring needle is provided at the lower end of the stirring head. The ultrasonic probe, amplitude transformer, transducer, and first ultrasonic generator are connected sequentially, and the ultrasonic probe is connected to the stationary shoulder. The amplitude transformer transducer is located on the tool holder. The conductive slip ring is sleeved and connected to the outside of the amplitude transformer transducer and is electrically connected to the second ultrasonic generator. The feeding mechanism communicates with the interior of the stationary shoulder. This invention can smoothly promote material softening and flow, reduce material rheological stress, and prevent a significant temperature increase.

This invention discloses a corrosion-resistant free-machining brass alloy, its preparation method, and its applications. The corrosion-resistant free-machining brass alloy is composed of the following components by mass percentage: Cu: 58.0~62.5%, Si: 0.3~1.2%, Ni: 0.1~0.5%, Mn: 0.3~0.7%, B: 0.005~0.025%, with the balance being Zn and unavoidable impurity elements, wherein the total content of unavoidable impurity elements is <0.3%. The brass alloy of this invention possesses excellent machinability, corrosion resistance, and mechanical properties, and is lead-free, meeting environmental protection requirements and satisfying the needs of various fields for brass alloy materials.

This invention relates to the field of semi-solid materials and discloses a semi-solid pulping machine, including a frame, a pulping component and an ejection mechanism below the pulping component on the frame, a vertical channel penetrating the upper and lower sides of the pulping component on the pulping component, and an ejection mechanism including an injection rod with a punch at the top of the injection rod. The punch has a hollow structure and is slidably connected to the vertical channel and can close the lower end of the vertical channel. The top of the punch is perpendicular to the side wall of the vertical channel to produce aluminum material and prevent material from sticking.

This invention discloses a multi-energy field assisted deep drawing device and method for difficult-to-deform alloys with equivalent draw beads, belonging to the field of sheet metal deep drawing processes. It includes a deep drawing punch, a blank holder slidably fitted around the periphery of the deep drawing punch, and a deep drawing die. The deep drawing punch can be inserted into the deep drawing die. A temperature system is symmetrically arranged around the blank holder and the overlapping portion of the deep drawing die and blank holder. The temperature system includes a ring-shaped heating zone centered on the deep drawing punch, a cooling zone, and a second heating zone. The cooling zone is located between the first and second heating zones. When the billet is deep-drawn, the temperature of the cooling zone is lower than that of the first and second heating zones. Since the yield strength of the material varies at different temperatures, controlling the local cooling temperature increases the radial tensile stress in that section of the material, thereby avoiding circumferential wrinkling and improving forming quality. This method allows for applying different temperatures to different materials to change the radial tensile stress, exhibiting greater adaptability.