Reamer

Abstract

The invention discloses a hole-enlarging device which comprises a cylinder body, a hole-enlarging piece, an ejecting piece and a driving device, wherein the hole-enlarging piece is arranged in the cylinder body, the hole-enlarging piece comprises a hole-enlarging mouth, a through hole and a groove communicated with the through hole are formed in the hole-enlarging mouth, the ejecting piece comprises a thimble, the thimble is a shaft of which at least part of diameter is greater than the diameter of the through hole, the thimble is inserted into the through hole, and the driving device drives the thimble to go deep into the hole-enlarging mouth. When the hole-enlarging device is used, a workpiece of which the hole needs to be enlarged is covered on the hole-enlarging mouth, and the driving device drives the thimble to go deep into the hole-enlarging mouth. The diameter of the thimble is greater than the inner diameter of the through hole, so that when the thimble goes deep into the hole-enlarging mouth, the hole-enlarging mouth is enlarged, the diameter of the hole-enlarging mouth is enlarged, and the diameter of the through hole in the corresponding workpiece is enlarged, so that a hole-enlarging step can be completed. When the hole is enlarged, an axial force can not be generated, so that the yield of the workpiece can be greatly increased, and the hole-enlarging step can be wholly mechanically completed. The production efficiency can be improved.

Description

technical field [0001] The invention relates to equipment for producing sealing rings, in particular to a hole reamer. Background technique [0002] The raw material of the sealing ring is a stepped shaft with two cylinders with different diameters, and the end of the cylinder with a larger diameter is provided with a hole, and the length of the cylinder with a smaller diameter on the stepped shaft and the depth of the hole should be kept the same. [0003] In actual use, the diameter of the hole needs to be enlarged before it can be used. The method adopted is to adopt the same round rod as the gauge plug, and directly insert the hollow end manually to force the hollow end to expand. There is a big problem with the manual reaming method: the raw material of the seal and the round rod, which is the same as the gauge plug, have relative movement, and are subjected to a large axial force during the entire reaming process. During manual reaming, the raw material of the seal w...

AI Technical Summary

Problems solved by technology

Using the manual reaming method, there is a big problem: the round rod, which is the same as the raw material of the seal and the gauge plug, has relative movement, and is subjected to a large axial force during the entire reaming process.

During manual reaming, the raw material of the seal will move axially, and the workers will manually compensate for the axial movement. This operation is very cumbersome and complicated.

Moreover, due to the large axial force, workers with low technical level will easily damage the workpiece, which is also the reason for the low yield of the seal.

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