Machining method for thin-wall gear ring with small width-diameter ratio

Abstract

The invention provides a machining method for a thin-wall gear ring with a small width-diameter ratio, and solves the problem that the precision requirement of a spline plate gear ring cannot be met when a gear ring with the width of 15mm is machined by an existing machining process for the thin-wall gear ring with the small width-diameter ratio. The method comprises the following steps: 1) determining the axial width H of a blank, wherein H = mH1 + (m-1) a + 2b; m is an integer > = 2 and < = 4; h1 is the required axial width of the thin-wall gear ring with the small width-diameter ratio, a is cutting loss each time, and b is end face turning loss; (2) the end face A of the blank is clamped through a clamping jaw, and an inner hole and the end face B of the blank are turned; an annular cutting groove with the width of a is machined in the inner hole every H1 width from the end face B to the end face A, and chamfers are machined on the two sides of the annular cutting groove; (3) the blank piece is expanded through an expansion sleeve assembly, and the outer circle and the A end face of the blank piece are turned; and (4) a grooving cutter is used for cutting the position, corresponding to the annular cutting groove, of the outer circle of the blank from outside to inside, and machining of the m thin-wall gear rings with the small width-diameter ratio is completed.

Description

technical field [0001] The invention relates to a processing technology for a thin-walled ring gear with a small aspect ratio, in particular to a processing method for a thin-walled ring gear with a small aspect ratio. Background technique [0002] In the AT automatic box of a commercial vehicle, there is a thin-walled ring gear with a small aspect ratio, such as figure 1 As shown, the axial width H1 of the part is 15mm, and the diameter of the inner hole Outer diameter The ratio of the inner diameter or outer diameter of the ring gear to the width of the ring gear is as high as 24 times or more. According to the precision requirements of the gear part, it is necessary to ensure that the upper and lower flatness of the part is within 0.08mm in the finishing process. [0003] At present, for the processing technology of thin-walled ring gears with wide-diameter ratio, for example, the publication number is CN101659002A, and the patent name is the Chinese patent of thin-w...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem that the existing width-to-diameter ratio thin-walled ring gear processing technology processes a ring gear with a width of 15 mm, the plane parallelism of the processed parts is above 0.15, which cannot meet the precision requirements of the splined ring gear, the invention provides A processing method for thin-walled ring gear with small aspect ratio

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