4results about How to "Avoid bending stress" patented technology

The application relates to the technical field of welding tooling, and particularly discloses an automobile part machining and welding tooling which comprises a tooling base and hydraulic clamping arms, further comprises a plurality of positioning pins, and a fitting assembly is composed of two detachable upper and lower parts; a temperature control assembly is connected with the fitting assembly; the automobile part machining and welding tooling adopts one-to-one corresponding dot matrix telescopic supporting columns for the fitting assembly, so as to adapt to the arc-shaped surface of a workpiece and stamping tolerance, the tooling transformation cost is low, the upper and lower counter-pressure structure makes the force of the workpiece uniform, the temperature of the fitting area of the fitting assembly is detected through the set temperature control assembly, the clamping force between the fitting assembly and the workpiece is increased when the temperature of the workpiece in the supporting area of the fitting assembly is increased, and the warping deformation of the supporting surface of the workpiece is avoided.

This utility model discloses a conveyor belt drive device, including a drive frame, a roller mounting base, and a roller. The roller's main shaft is rotatably mounted on the roller mounting base at both ends via bearing seats and connected to a motor via a reducer. The reducer has a reducer base, and the reducer base has a connector with a connecting hole. The roller mounting base has a reducer mounting seat with two limiting plates. The limiting plates have limiting plate through holes corresponding to the connecting hole. A pin is inserted to achieve a positioning connection between the connector and the limiting plates. This utility model supports the pin with double limiting plates on the reducer mounting base. The reducer base is connected to the pin. By supporting both ends of the pin, damage to the pin can be effectively avoided, ensuring stable and reliable installation of the reducer base. It can withstand the downward pressure and rotational torque from the reducer, thus ensuring the stability of the reducer and motor and the smooth rotation of the roller.

This application discloses a turbine blade strength design method and system, belonging to the field of blade strength design technology. The turbine blade strength design method includes the following steps: establishing a blade airfoil model, wherein the center of the stacking axis of the blade in the airfoil model coincides with the centroid of the blade; determining and obtaining the execution tolerance of the blade based on the airfoil model; establishing a tolerance influence assessment calculation model based on the execution tolerance; and optimizing the blade airfoil model based on the tolerance influence assessment calculation model. This improves the accuracy of determining and obtaining the execution tolerance, and enables theoretical analysis of the execution tolerance of the blade airfoil during forward design. It avoids the problem that the execution tolerance influence exceeds the reserve coefficient required by the blade design criteria during actual production, reduces the risk of fatigue fracture of the blade, improves the actual life of the blade, and ensures that the strength of the turbine blade meets the actual requirements of strength design and engineering production.

The utility model discloses a lifting device and a lifting connection device. The lifting device comprises a supporting structure, the supporting structure comprises at least one supporting assembly, the supporting assembly is used for containing a base plate, each supporting assembly comprises a first base, the first base is provided with a plurality of sets of supporting units, and the supporting units are connected with the base plate; the lifting structure comprises a driving part, the output end of the driving part is provided with a steering assembly, the steering assembly is connected with at least one lifting assembly and converts rotary motion into vertical motion, and the lifting assemblies are connected with the first base so as to drive the base plate to ascend or descend. According to the utility model, the single driving piece drives the lifting assemblies through the steering assembly, so that synchronous lifting of multiple supporting points is ensured, and inclination or clamping stagnation of the substrate is avoided; the steering assembly converts the horizontal rotating motion of the driving piece into the vertical direction, and the problem that the precision of a traditional pneumatic / hydraulic system is insufficient due to pressure fluctuation is solved.