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过去用一般压力机校直型材时,由于其材质、断面形状、变形程度及两支承点的距离不同,压下量不易掌握,往往在一个点上要反复多次才能达到要求。因此生产率低,质量不易保证。我厂自行设计制造了一台新型的油压撑直机(图1)。撑直机的基本原理同油压机相似(图2)。它的压头(动横梁8)与支承(静梁3)的相对距离可随时精确地调整或固定,同时还能连续以15～30次/分速度,30～80毫米的幅度作脉冲往复运动。由于脉冲时间短(3秒左右)、幅度大(大于工件的回弹距离),因此
In the past, when using normal presses to straighten profiles, because of its different materials, cross-sectional shape, degree of deformation, and distances between the two support points, the amount of reduction is not easy to grasp, and it is often repeated several times at one point to meet the requirements. Therefore, the productivity is low and the quality is not easy to guarantee. Our factory designed and manufactured a new type of hydraulic straightening machine (Figure 1). The basic principle of the straightener is similar to that of a hydraulic press (Figure 2). Its relative distance between the indenter (moving beam 8) and the support (static beam 3) can be accurately adjusted or fixed at any time, and can also continuously reciprocate at a pulse speed of 15-30 times/minute and 30-80 millimeters. . Since the pulse time is short (about 3 seconds) and the amplitude is large (more than the rebound distance of the workpiece), therefore