Expansion sleeve

Abstract

The invention discloses an expansion sleeve. The sleeve comprises an air bag inner shaft, the air bag inner shaft is fixedly sleeved with an air bag, a groove is formed in the position, correspondingto the inner wall of the air bag, of the outer circumference of the air bag inner shaft, an air cavity is formed between the groove and the air bag, an inflation channel is formed in the air bag innershaft, one end of the inflation channel communicates with the air cavity, a port in the other end of the inflation channel is located on the end of the air bag inner shaft and communicates with the exterior, an outward expansion sleeve is fixedly arranged on the air bag in a sleeving manner, and a circumference face is arranged on the outer wall of the outward expansion sleeve. Through air bag expansion, the size of the outer circumference face, matched with the inner rings of piston rings, of the outward expansion sleeve can be increased, the air pressure in the air cavity is changed, adapting to the honing amount of multiple specifications of the outer circles of the piston rings can be achieved, the outward expansion sleeve and the air bag are arranged to be in a cylinder shape, the air cavity is arranged to be in a multiple-ring shape, the outer circumference of the outward expansion sleeve can be sleeved with the multiple piston rings, a steel expansion sleeve is arranged betweenthe outward expansion sleeve and the air bag, uniform expansion of all portions of the outward expansion sleeve is ensured, the expansion degree of each piston ring is same, and it is ensured that the honing amount of the outer circle of each piston ring is consistent.

Description

technical field [0001] The invention relates to a piston ring processing tool, in particular to an expanding sleeve used for honing the outer circle of a piston ring. Background technique [0002] The piston ring is a metal elastic ring with a large outward expansion deformation, which is assembled into the annular groove corresponding to the section. The reciprocating and rotating piston rings rely on the pressure difference of gas or liquid to form a seal between the outer circular surface of the ring and the cylinder and one side of the ring and the ring groove. [0003] However, when honing the outer circle of the piston ring, each manufacturer has different processing methods when honing the outer circle of the piston ring, resulting in different processing quality of the products and a relatively large difference in processing efficiency. When honing the outer circle of the piston ring, since there are many specifications of the piston ring, if there are no tools suit...

AI Technical Summary

Problems solved by technology

[0003] However, when honing the outer circle of the piston ring, each manufacturer has different processing methods when honing the outer circle of the piston ring, resulting in different processing quality of the product and a relatively large difference in processing efficiency.

When honing the outer circle of the piston ring, since there are many specifications of the piston ring, if there are no tools suitable for various specifications, a variety of molds are required to fix the inner circle of the piston ring, which makes the production cost high and the operation is troublesome

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