8results about How to "Reduce rebound" patented technology

The utility model relates to a kind of rock breaking rods, it includes: including main body and hammer head, main body is covered with flexible layer outside, main body is equipped with movable cavity inside, movable cavity is arranged close to the bottom end of main body, several movable members are filled in movable cavity, and movable member can freely move in movable cavity. Hammer head is located below main body, and is connected with the bottom end of main body. Inertial motion of movable member can absorb and offset part of kinetic energy that bounces back to rock breaking rod, so as to significantly reduce rock breaking rod echo, improve rock breaking effect. Movable member shakes in movable cavity can significantly reduce the vibration of rock breaking rod and the intensity of high-frequency noise radiated outward, so as to be conducive to ecological environmental protection. Flexible layer covered outside main body buffers the vibration of main body, and reduces the noise propagated outward by main body. Therefore, the rock breaking rod can reduce the adverse effects of energy bouncing back to rock breaking rod.

The application relates to a flattening device for carton production, which comprises a frame body, a conveyor for conveying carton boards arranged on the frame body, a plurality of guide rollers arranged along the length of the conveyor in sequence, a flattening mechanism arranged on the frame body and used for flattening the carton boards, characterized in that a heat source roller is arranged above the conveyor and used for hot pressing the carton boards, and a driving member is arranged on the frame body and used for driving the heat source roller to rotate. The flattening device can be used in cooperation with the heat source roller, the driving member and the flattening mechanism, the carton boards can be hot-pressed before being flattened, the carton boards are subjected to the joint action of heat and pressure, the flexibility of the carton boards is reduced, the resilience of the carton boards is weakened, the required pressure and time for subsequent flattening are reduced, the carton boards can reach the flatness requirement through one or a small number of flattening operations, and the production efficiency is improved.

This invention provides a skeleton oil seal for large interference fit. The outer periphery of its rubber layer has radially protruding first, second, and third stepped sections from top to bottom. The bottom end of the third stepped section has an auxiliary chamfer. The interference fit of the three stepped sections is different, with the second stepped section having the largest interference fit. This simplifies the interference fit installation of the skeleton oil seal and optimizes stress distribution, reducing the maximum shear force. The auxiliary chamfer helps reduce the interference fit during initial press fit, facilitating smooth alignment of the bottom end of the skeleton oil seal and its forward insertion into the bearing. Multiple annular protrusions are provided on the outer sides of the three stepped sections, forming a wavy, concave-convex structure. This reduces the rebound of the skeleton oil seal after assembly, ensuring it is in the correct assembly position. While maintaining sealing performance, this reduces rubber compression, thus preserving rubber elasticity and extending the service life of the skeleton oil seal.

The application discloses a kind of high density low rebound shotcrete and preparation method thereof, it is related to shotcrete field, and preparation method includes: (1), respectively to cementitious material, fine aggregate, coarse aggregate is using MAA model to be packed and the design ratio of each raw material in interior is obtained;(2), cementitious material, fine aggregate, coarse aggregate and the rebounding agent of design ratio obtained according to step (1) are fully mixed, water, water reducing agent is mixed, then by the way of mixing with pressurized air, incorporate accelerator, obtain high density low rebound shotcrete.The application uses early strength rebounding agent, improves the pumpability of shotcrete, accelerates the early hydration of concrete, under the joint action of alkali-free accelerator, rapidly improves the early mechanical properties of shotcrete, improves shotcrete construction efficiency.Multiple close packing is used, and cementitious material, fine aggregate, coarse aggregate respectively form close packing structure, effectively improve the plastic viscosity of paste and the compactness of concrete.

The application discloses a three-way catalyst reducer shaping tool composite die set, which comprises a fixed die seat, the upper end face of which is provided with a lower die seat in parallel, two symmetrically arranged side die frames, which are symmetrically fixed on the fixed die seat and located on the two sides of the lower die seat, an upper stamping seat arranged above the fixed die seat, a first forming die set and a second forming die set, each of which is composed of two model plates arranged in an up-down mode, a die closing mechanism arranged below the lower die seat, and a plurality of reducer units, each of which is arranged at two reducer shaping ports of the first forming die set and the second forming die set. The double die set design of the application combines pre-reducing with accurate reducing, step-by-step forming is realized, size out-of-control caused by single large deformation is avoided, and a micro dynamic spinning shaping force is applied to the inside of the shell, so that the rebound is significantly reduced and the size stability after reducing is ensured.

The utility model discloses a torsion spring and buffer's combination reset device is provided with torsion spring reset mechanism and buffer in the door leaf side part, the torsion spring reset mechanism is equipped with the lower limit position cover, the pivot and upper limit position cover that connect in proper order, and the pivot outside is equipped with the sheath and torsion spring, and is equipped with the locating sleeve and locating block at the upper limit position cover, the one end of torsion spring is connected with lower limit position cover, and the other end is connected with metric shaft sleeve and intermediate limit position cover, the utility model discloses through torsion spring + buffer and realizes the automatic reset of door leaf, and through increasing buffer, the resilience of door is reduced, prevents the back and forth movement of door leaf in the middle position, improves security.

The application discloses a forming method of a large-size high-temperature alloy curved generatrix single-wall section product, which comprises the following steps: preparing a fan-shaped spread material; rolling and bending the fan-shaped spread material to form a conical cylinder by forming and combining welding; performing flanging forming on the conical cylinder, and the flanging angle is 30-35 degrees; performing bulging forming on the product obtained by the flanging forming; and performing solid solution treatment on the product obtained by the bulging forming, and the shape correction is realized by adopting the method of re-bulging forming, so that the springback is reduced. The application further discloses a forming device of a large-size curved generatrix single-wall section product, which comprises a flanging die, a female die and a bulging die; wherein the flanging die and the female die are used for realizing flanging forming; and the bulging die and the female die are used for realizing bulging forming. The product obtained by the application has high shape and size precision, low forming period and manufacturing cost, and small springback of the high-temperature alloy product after forming, and is suitable for batch production of large-size high-temperature alloy single-wall section products.

The application discloses a laser and gas mist synergistic shape control device for robot incremental forming, which comprises a first robot and a second robot arranged on two sides of a plate respectively; the first robot and the second robot are kept relatively static at all times; the first robot is fixedly provided with a first tool head, a first laser and a first gas mist nozzle, and the first tool head, the first laser and the first gas mist nozzle are kept relatively static at all times; the first laser and the first gas mist nozzle are located on two sides of the first tool head respectively; the area of a coverage area of gas mist sprayed by the first gas mist nozzle is 1.5-5 times the area of an irradiation area of laser emitted by the first laser; the second robot is fixedly provided with a second laser and a second gas mist nozzle, and the second laser and the second gas mist nozzle are kept relatively static at all times; the area of a coverage area of gas mist sprayed by the second gas mist nozzle is 1.5-5 times the area of an irradiation area of laser emitted by the second laser. The device can improve forming precision and forming quality.