A method for installing a bushing on a shell and the used pressure sleeve tooling

Abstract

The invention discloses a method for mounting a bush on a shell and a used bush pressing tool. The bush pressing tool is adopted to mount the bush on the shell rapidly; the bush pressing tool comprises a bush pressing rod, and the bush pressing rod consists of three sections of cylinders with different diameters; before mounting, the bush is placed in liquid nitrogen to be frozen, meanwhile the shell is placed in a heating furnace to be fast heated to 180 DEG C; during mounting, the shell is taken out of an orifice from the heating furnace and is upwards placed on a working platform, then the bush is taken out of the liquid nitrogen to be sleeved on the small-diameter cylinder of the bush pressing rod, a force applying boss between the small-diameter cylinder and the medium-diameter cylinder on the bush pressing rod applies force to the bush, and the bush is pressed in a bush hole of the shell. The bush pressing tool is smart in concept, simple in structure, convenient to clamp and low in production cost, and working time of bush pressing is effectively shortened, such that the bush pressing process can be finished at the instant when a shell hole and the bush make contact to raise temperature, and product quality is ensured.

Description

technical field [0001] The invention relates to a method for installing a bushing on a housing and a press-fitting tool used, belonging to the technical field of mechanical assembly. Background technique [0002] In some hydraulic products, by installing some hydraulic parts in the housing, the housing contains multiple oil circuits that constitute the hydraulic system. Therefore, the processing of the housing is difficult, the cycle is long, and many types of work are involved. Therefore, when installing hydraulic parts , if the shell is scrapped, the loss will be very large. In the production of a certain product, it is necessary to install a bush on the processed shell. Since the parts such as the bush and the shell are tightly fitted, and there are many oil holes on the bush that communicate with the oil passage in the shell, so When installing the bushing, accurate positioning is required to ensure reliable alignment of the oil hole on the bushing with the oil passage ...

AI Technical Summary

Problems solved by technology

In the current method of installing the bushing, the bushing is often unqualified due to inaccurate positioning of the bushing, the oil hole on the bushing is not aligned with the oil passage in the casing, or the bushing is too long, and the bushing needs to be returned for repair. It even caused the whole casing to be scrapped, which not only affected the delivery of the product, but also led to the scrapping of the casing, which greatly increased the production cost of the product

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