用薄板制作水桶等器皿时,为了与底的结合和提高强度,要在下边翻出一道边沿和压出一道凸线(见图1)。中小批量生产一般是在压线机上分别用滚轮压制,不但效率低,而且筒的接缝易松动,压后圆筒失圆,还需另加整形工序。为此,我们设计了一种复合压轮,在挡板上增加 When making a container such as a bucket with a thin plate, a border and a protruding line are pushed out underneath (see FIG. 1) for the purpose of bonding to the bottom and increasing the strength. Small and medium-sized batches are generally pressed on the roller were pressed, not only inefficient, but also easy to loose the joints of the tube, the cylinder after the circle is out of round, plus an additional shaping process. To this end, we designed a compound pressure wheel, added on the baffle