High-precision gear centering and clamping device based on inner hole centering and machining method of high-precision gear centering and clamping device

Abstract

The invention discloses a high-precision gear centering and clamping device based on inner hole centering and a machining method of the high-precision gear centering and clamping device. The high-precision gear centering and clamping device comprises a hydraulic module used for driving the whole device, and an expansion sleeve centering and clamping module used for clamping a gear. The expansion sleeve centering and clamping module is arranged at the upper end of the hydraulic module and comprises a frustum base and an elastic expansion sleeve matched with the frustum base. The elastic expansion sleeve is movably arranged on the frustum base in a sleeving manner and driven by the hydraulic module to axially move. The axial movement of the elastic expansion sleeve relative to the frustum base can be converted into radial deformation of the elastic expansion sleeve, and therefore the to-be-machined gear can be centered and clamped. Rapid self-centering of a gear inner hole and gear clamping can be easily finished, and the positioning precision and the production efficiency are improved. The device and the method are suitable for various gear grinding machining processes in which gears are aligned through inner holes, and the using effect is particularly obvious for high-precision gears produced on a large scale.

Description

technical field [0001] The present invention relates to a high-precision gear centering clamping device based on inner hole centering and its processing method, in particular to a high-precision gear fast centering clamping device and its use method for grinding teeth with the inner hole as the centering reference . Background technique [0002] The gears processed by the gear grinding process generally have high precision requirements. Alignment and centering with the inner hole has always been one of the most basic and important methods for gear grinding with inner holes. How to accurately align the inner hole before grinding Runout within the specified range of process drawings is directly related to the precision and quality of gear grinding. [0003] In mass production, if the gears cannot be quickly and accurately clamped and aligned, it will inevitably have a negative impact on product quality and processing efficiency. At present, the most commonly used method for ...

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Problems solved by technology

[0004] However, this method of manual alignment and clamping does have many deficiencies: 1. Manual alignment is performed based on personal feel and experience, and the operator needs to knock and watch over and over again. The orientation is very particular. Even a very skilled person needs to spend 20 minutes to complete the alignment. It is normal for an unskilled person to spend an hour or two. It is time-consuming and laborious, and is not suitable for mass production.

2. After the alignment is completed, it is necessary to use the pressure plate to compress the workpiece. At this time, the force is likely to change the position of the workpiece and destroy the accuracy of the alignment. In this way, it is necessary to loosen the pressure plate and repeat the manual alignment. During the process, if the pressure plate is not tightly pressed, the gear grinding may occur in the middle, and the workpiece shifts, resulting in unqualified grinding accuracy and poor stability.

Although the above scheme can achieve the purpose of gear fixing, the operation steps are relatively cumbersome and the fixing accuracy of the device is not high due to manual operation.

Most critically, the above-mentioned technical solution is difficult to ensure that the gear aligned with the inner hole is fixed and stable during the grinding process. Once the gear becomes loose, it will not only reduce the machining accuracy, but also cause damage to the gear, which will greatly reduce the production efficiency and Yield rate

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