特征：八孔定位，设有加固边，借助定位夹具更精准。

Feature: eight hole placement stronger and precise connection by an additional strip and placement tool.

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一种利用蜗杆蜗轮传动无级调节偏心的双偏心轮定位夹具。

A new stepless-adjusted jig using worm and worm gear driving is introduced in this article.

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与V形块定位夹具相比，该夹具具有结构简单、制造及装配工艺性好等特点。

Compared with the traditional jig using V-block, this jig is of simple structure and easy assembling.

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