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Numerical control machining method for harmonic reducer flexible gear bi-directional crowned tooth profile

A technology of harmonic reducer and processing method, which is applied in the direction of gear teeth, components with teeth, metal processing equipment, etc. Deformation and other problems, to achieve the effect of high cost performance, ensure accuracy and efficiency, and easy to use

Inactive Publication Date: 2015-05-20
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the thin wall and high flexibility of the flexspline in the harmonic reducer, the tooth profile of the external ring gear is easily deformed, so it is difficult to process the bidirectional drum-shaped flexspline

Method used

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  • Numerical control machining method for harmonic reducer flexible gear bi-directional crowned tooth profile
  • Numerical control machining method for harmonic reducer flexible gear bi-directional crowned tooth profile
  • Numerical control machining method for harmonic reducer flexible gear bi-directional crowned tooth profile

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Embodiment Construction

[0024] Combine below Figure 4~6 The embodiments of the present invention will be further described.

[0025] For a bidirectional drum-shaped stub flexspline harmonic gear, the flexspline processing includes the following steps:

[0026] (1) turning the flexible spline blank on a precision lathe to make the flexible spline semi-finished product 10;

[0027] (2) Set the semi-finished flexspline 10 on the thin-walled sleeve 6, and fill the ring groove of the clamp body 5 with liquid plastic 7. When the rotating screw 9 pressurizes the cavity through the plunger 8, the liquid plastic 7 transmits pressure in all directions, and under the action of the pressure, the thin-walled sleeve 6 produces uniform elastic deformation in the radial direction, and is fixed by nuts 13 and gaskets 11 The bottom of the flexspline cup, and then the drum-shaped surface of the tooth top along the tooth direction is machined;

[0028] (3) A precision alignment instrument is used to precisely align ...

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Abstract

The invention discloses a numerical control machining method for a harmonic reducer flexible gear bi-directional crowned tooth profile, and relates to a harmonic reducer. The method comprises the steps that a rough machined flexible gear workblank is machined into a flexible gear semi-finished product on a precision lathe; a liquid plastic thin wall sleeve fixture is sleeved with the obtained flexible gear semi-finished product, positioning and clamping are carried out on the flexible gear semi-finished product, a nut and a gasket are used for fixing the cup bottom of the flexible gear, and then a tooth crest crowned surface in the tooth direction is lathed on a precision numerical control lathe; a precision aligning instrument is used for enabling a numerical control precision gear shaping with a gear cutter or a gear hobbing machine tool with a gear cutter to be precisely aligned to the lathed workpiece, and an elliptical core shaft fixture is used for positioning the flexible gear; a tooth thickness crowned surface in the tooth direction of the flexible gear is machined through multi-axis linkage control on the numerical control gear shaping or the gear hobbing machine, when the machining is performed, the long shaft direction of the elliptical core shaft fixture is fixed, and the midpoint of the cutter axis is ensured to be aligned to a long shaft of an elliptical core shaft; meanwhile, the flexible gear rotates around the elliptical core shaft, and the flexible gear tooth profile is machined through the generating motion of the gear cutter and the flexible gear.

Description

technical field [0001] The invention relates to a harmonic reducer, in particular to a numerical control machining method for a bidirectional drum-shaped tooth profile of a flexspline of a harmonic reducer. Background technique [0002] The harmonic reducer is a transmission gear device that relies on the elastic deformation of flexible gears to realize motion and power transmission. like figure 1 As shown, the harmonic reducer is composed of basic components such as wave generator 1, flexible spline 2, rigid spline 3 and flexible bearing 4. The wave generator is installed inside the flexspline, and its outline is an ellipse or a nearly elliptical curve. During the relative rotation between the wave generator and the flexspline, the flexspline is forced to produce elliptical radial deformation at its long axis end according to a certain rule. During work, the teeth at both ends of the long axis of the flexible spline mesh with the rigid spline, while they are completely d...

Claims

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Application Information

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IPC IPC(8): B23P15/14B23Q3/00B23F5/20B23F23/06
CPCB23F5/202B23F23/06B23P15/14B23Q3/00B23Q2703/02Y02P70/10
Inventor 姚斌冯伟王萌萌吕颖沈志煌张祥雷腾伟斌
Owner XIAMEN UNIV
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