Thin Workholding

Abstract

The invention discloses a thin workpiece fixture, which includes two clamping devices, each clamping device includes a bearing part and a clamping part, the bearing part has a bearing part and a supporting part; the supporting part is arranged on the bearing part, and its top is provided with The stepped part has a bottom surface and a side surface with a slope; the clamping part has a clamping part and a damping part, and one side edge of the clamping part is a slope whose slope is the same as that of the side surface; the damping part consists of at least two layers The elastic layer and at least one metal layer are interspersed with the same slope as the side surface and the inclined surface. One elastic layer is connected with the inclined surface of the clamping part, and the other elastic layer is arranged on the supporting part.

Description

Technical field [0001] The invention relates to a workpiece fixture, in particular to a thin workpiece fixture with a multi-dimensional modal vibration damping inclined surface to achieve a vibration damping effect in each mode, which can reduce the vibration of the workpiece during the cutting process and is performed in a steady state. Background technique [0002] Regarding the cutting and manufacturing process of thin workpieces, such as thin-walled aerospace blades, simple fixtures or only screws are used to lock on the bed for processing. See Image 6 As shown, the existing clamping device 90 is clamped on opposite sides of a workpiece 20 respectively. The clamping device 90 is composed of a base 92 and a cover 91. Both the base 92 and the cover 91 are made of metal materials. After pressing and milling both sides of the workpiece 20, the workpiece 20 will be formed as Image 6 Thin parts shown in dashed lines. [0003] In the milling of the primary and middle embryos, the amo...

AI Technical Summary

Problems solved by technology

[0003] During the milling process of the embryo and the embryo, the amount of material removed is large, the processing efficiency is high, and it is easy to cause a large vibration, especially when the workpiece is cut and thinner, the rigidity becomes lower, and it is easy to vibrate or chatter. The cutting steady-state area will become smaller and smaller, and the choice of steady-state processing parameters will be limited, resulting in poor processing efficiency

Therefore, the workpiece needs to reduce the vibration during the machining process and process it in a steady state to avoid excessive vibration during cutting, which may cause poor precision or damage to the workpiece and cause yield problems.

[0004] The vibration damping devices of the existing workpieces are all externally hung or leaned on the outside of the workpiece, and are composed of springs. The design disadvantage of this aspect is that it can only dampen vibration for a single interval frequency (single mode), but the nature of the thin-walled workpiece Frequencies and mode shapes have a variety of shapes, and the influence of other modes cannot be fully reduced

[0005] Secondly, the existing vibration damping fixture can only damp vibration in a single direction, and the vibration mode of the workpiece is a three-dimensional movement. The maximum shear stress surface must be found through stress analysis to reduce the vibration mode.

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