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一、前言目前广泛采用的金属模拉延方法,在减少拉延工序,降低模具成本,对形状复杂零件的拉延,应付多品种小批量的生产方式,提高表面质量,避免板厚局部减薄等问题上受到了一定限制。为了解决这些实际问题,1958年日本春日等人提出了“压力润滑拉延法”;1966年F·J·Fuchs提出了从板料凸缘外周施加径向压力的对向液压拉延方法。1977年我国安徽拖拉机厂首次应用了充液凹模拉延工艺。最近日本中村等人在对向液压
I. INTRODUCTION Nowadays, the extensive use of die drawing method can reduce the drawing process, reduce the cost of the die, draw on the complex shape parts, cope with the production of many kinds of small batch, improve the surface quality, and avoid the local thinning of the plate thickness And other issues subject to certain restrictions. In order to solve these practical problems, Japan’s spring day in 1958 put forward the “pressure lubrication drawing method”; in 1966 F · J. Fuchs proposed opposite hydraulic pulling method of applying radial pressure to the periphery of the sheet flange. 1977 China’s Anhui Tractor Factory for the first time the application of liquid-filled die drawing process. Recently, Japan’s Nakamura and others in the hydraulic pressure