粘接夹具加工工艺研究

粘接夹具是同步器生产制造过程中使用的一种专用夹具,其核心零件是底座和压锥,它们的加工精度决定了粘接夹具的装配精度。底座和压锥的锥面大头尺寸的公差非常小,在加工过程中使用普通的量具无法直接测量准确,须送精测室使用三坐标测量仪测其实际值,在磨削的过程中需多次测量,这样就严重影响了生产效率。笔者提出将锥面大头尺寸及公差转换到高度方向,有效将其公差范围放大,通过保证高度方向尺寸及公差,间接保证锥面大头尺寸及公差。实际应用表明:笔者所采用的方法简单实用,废品率低,并且能提高生产效率,从而具有普遍的推广性。

粘接夹具锥面大端尺寸检测专用检具的设计

粘接夹具的核心零件是底座和压锥。由于底座和压锥的锥面大端尺寸公差非常小,使用普通量具无法直接准确测量,使用专用的校对塞规、校对环规检测时废品率偏高。因此,设计两种检测锥面大端尺寸的专用检具。以校准件为基准,调整千分表,将加工产品放入专用检具,若千分表的变动量在锥面大端尺寸公差范围内,则加工的产品合格。实际应用表明此锥面大端尺寸专用检具使用方便,检测精度高。

Evaluation of Adhesive Joints for Combined Load Test-Fixtures

Abstract： In a test-fixture that the authors were using, steel tabs adhesively bonded to an aluminum panel debonded before the design load on the real test panel was fully applied. Therefore, studying behavior of adhesive joints for joining dissimilar materials was deemed to be necessary. To determine the failure load responsible for debonding of adhesive joints of two dissimilar materials, stress distributions in adhesive joints as obtained by a nonlinear finite element model of the test-fixture were studied under a gradually increasing compression-shear load. It was observed that in-plane stresses were responsible for the debonding of the steel tabs. To achieve a better understanding of adhesive joints of dissimilar materials, finite element models of adhesive lap joints and ADCB （asymmetric double cantilever beam） were studied, under loadings similar to the loading faced by the test-fixture. The analysis was performed using ABAQUS, a commercially available software, and the cohesive zone modeling was used to study the debonding growth.

无骨架线圈组件成形夹具

简介了无骨架线圈组件的结构和优点，着重介绍了试制该组件的夹具结构。