3results about How to "Avoid casting defects" patented technology

The utility model discloses a five-open-die hub structure die which comprises a bottom plate and side dies, the center of the top of the bottom plate is connected with a lower die, the top of the lower die is provided with an upper die, the top of the upper die is connected with an upper die plate, a plurality of sets of side dies are arranged between the bottom plate and the upper die plate, and the lower die and the upper die are arranged among the plurality of sets of side dies. A triangular block is arranged between every two adjacent sets of side dies, a liquid rising pipe is arranged in the center of the bottom of the bottom plate, a die cavity is formed between the lower die and the upper die and communicated with the liquid rising pipe, and the five oil cylinders drive the five side dies to be opened at the same time. The casting defects caused by non-uniform cooling are effectively avoided, the qualified product percent of pass of the five-spoke hub casting is greatly improved, and the improvement of the qualified product percent of pass means that the number of unqualified products is reduced in the production process, so that the production cost is reduced, and the waste of materials is reduced.

The utility model relates to the technical field of steering systems, in particular to a lightweight steering engine shell structure capable of increasing structural strength. A lightweight steering gear shell structure capable of increasing structural strength is characterized in that a claw rib is arranged between one side of a driving gear pipe wall and a rack pipe wall, the claw rib is of a Y-shaped structure, a transverse rib at one end of the claw rib is connected with the rack pipe wall, the other end of the claw rib is forked to form an upper side wing plate and a lower side wing plate, and the upper side wing plate and the lower side wing plate are connected with the driving gear pipe wall. An upper side wing plate of the cleat rib is connected with the outer side of the pipe wall of the driving gear, and a lower side wing plate of the cleat rib is connected with the outer side surface of the bearing hole; a first reinforcing rib is arranged between the other side of the driving gear pipe wall and the rack pipe wall. Compared with the prior art, the horn rib structure is designed, so that the strength of the shell is obviously improved under the conditions that the thin wall thickness is kept and the weight of the shell is increased slightly; and meanwhile, the local thickness can be prevented from being too large, so that the casting defect caused by non-uniform cooling in the casting process can be better avoided.

The invention discloses an intelligent control method for the casting temperature of a thick and large nodular iron casting, and relates to intelligent manufacturing of casting equipment. Real-time temperature distribution data of the thick and large nodular iron casting are collected, and a three-dimensional temperature field is reconstructed in real time according to the real-time temperature distribution data; calculating the actual average temperature change rate of the thick and large nodular iron casting according to the temperature field data of the three-dimensional temperature field, and comparing the actual average temperature change rate with a preset target change rate value to generate a temperature change rate error signal; and the temperature change rate error signal is input into a PID controller optimized through a genetic algorithm to be subjected to closed-loop processing so as to output a dynamic adjusting instruction, and operation of cooling equipment used for controlling the casting temperature of the thick and large nodular iron casting and an electromagnetic induction heating module is controlled according to the dynamic adjusting instruction. The invention further discloses a device and a medium. According to the method, accurate balance of cooling rates of all areas of the casting is achieved, and casting defects caused by local temperature change rate differences are effectively prevented.