CN87208373U - Reamer - Google Patents

Abstract

The utility model relates to a reamer which is a cutter for precision processing to holes of various metal parts. Edge teeth are arranged on the circumference in the way of large distances and unequal division, and vibration is avoided in cutting process. The utility model has the advantages of high precision, long service life and good surface quality, and has the advantages that the utility model can replace and update current reamers and can also replace broaches and expensive diamond reamers. The taper and the roundness can reach 1 mu, and the finish can reach from delta 8 to delta 10.

Description

Reamer

The utility model relates to a kind of machining cutter.

The general reamer that uses, its sword are that five equilibrium is arranged on circumference, in working angles, produce periodic vibration inevitably, thereby the hole of cutting with scissors out with it, and surface quality is poor, and fineness is low, have polygon or axially striped and spiral lamination.The life-span of reamer is also very low.

The sword tooth not five equilibrium arrangement on circumference that proposed to adopt reamer is also arranged on the books and periodicals past such as the fifties, but the center angle difference of adjacent two-edged tooth is too little, be generally 1 °～2 °, 5 ° at most only～6 °, but also be not same all be 5 °～6 ° all adjacent sword tooth center angle differences on the reamer.Thereby very nearly the same with the reamer of five equilibrium arrangement sword tooth, so come out.

The purpose of the reamer described in the utility model just is to eliminate above-mentioned defective, promptly eliminates periodic vibration in working angles, improves surface quality, geometric accuracy and the service life in hole.

Reamer described in the utility model is applicable to various metals is carried out Precision Machining as the hole on cast iron, brass and the steel part.

In the utility model, the sword tooth of reamer adopts big distance not arrange (as figure) in five equilibrium ground on circumference, and the center angle difference of adjacent two-edged tooth is more than 8 °, and just not a pair of, but all each to difference all be more than 8 °, as this reamer N tooth arranged, N sword tooth center angle then arranged, ω on it ₁-ω ₂, ω ₂-ω ₃, ω ₃-ω ₄, ω ₄-ω ₅, ω ₅-ω ₆, ω _N-1-ω _n, ω _n-ω ₁Its absolute value is all greater than 8 °.The reamer of this structure has almost completely been eliminated periodic vibration.With the hole that it cuts with scissors out, surface quality is good, does not have polygon or vertical bar line, and fineness can reach

, circularity and tapering can reach 1 μ m; Life-span is higher 10 times even 100 times than general reamer.As with its ream H ₇,

The cast iron hole, the life-span can reach about 10,000.

This reamer is applied widely, both can replace existing reamer, also can replace more expensive broaching tool and expensive diamond reamer.On automatic machine tool, transfer matic, use, can save the miscellaneous work of a large amount of replacings and adjustment cutter.Simplified tool management work simultaneously.

Estimate the whole nation year consumption reamer, comprise the special manufacturer and use homemade nearly 1,000 ten thousand of factory, use this reamer only to need just can replace it below 1/10, not only can save up to ten thousand tons of steel and valuable alloy, can also make the qualification rate of hole processing improve the economic benefit highly significant greatly.

Claims (1)

1. A kind of reamer is characterized in that: the sword tooth is the five equilibrium ground arrangement of big distance on circumference, the center angle difference of adjacent two-edged tooth be not a pair of but every pair all be more than 8 °.

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