我厂有一批小轴零件(见图1),一端有两个对称的大圆弧R1、R2。以往加工都是先由钳工划线然后由铣床找正后铣出,不仅费工费时,且质量较差。现在我们设计出一种不需划线找正即可加工的夹具(图2),该夹具一次可同时加工六件,工效提高了12倍。具体工作过程如下:首先将本体夹持在三爪卡盘上,将六件小轴分别装入本体上的六个定位孔内,然后用紧固螺钉7,压板5及顶紧螺钉4将六件小轴压紧在本体上,即可加工。注意在加工零件的第一个圆弧部分R1时应将定位片拿走(见图3),在加工第二个圆弧部分R2时,则将定位片装上。 I plant a number of small shaft parts (see Figure 1), one end has two symmetrical large arc R1, R2. In the past, the machining was firstly crossed by a fitter and then milled by a milling machine, which not only took time and labor, but also had poor quality. Now we have designed a fixture that can be machined without scribing (Figure 2). The fixture can process six pieces at a time, resulting in a 12x improvement in work efficiency. The specific working process is as follows: First, the body is clamped on the three-jaw chuck, the six small shaft were loaded into the body of the six positioning holes, and then use the fastening screw 7, the pressure plate 5 and the tight screw 4 will be six A small shaft pressed on the body, you can process. Note that the positioning piece should be removed when machining the first arcuate portion R1 of the part (see Figure 3) and the second arcuate portion R2 is being machined.