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六、常见机床钣金构件的展开机床钣金构件多为薄板异形件,棱角多、形状候少对称性,多数采用计算法,由于构件多,下面介绍部分典型构件的展开(每种图形均有展开图,必要时介绍其计算方法): 1.直角展开图例(图26)。 2.斜角展开图例(图27)。 3.灯插弯角展开图例(图28、29)。 4.二面直角一面圆弧角的展开图例(图30、31)。 5.门角展开图例(图32,33)。 6.柜角展开图例(图34、35)。 7.两面直一面带斜度的构件展开(图36)。图36a所示的构件可用整料展开和带补料法展开。(1)整料展开:在图36 a的正视图上作出展开半径(取板厚中心),在俯视图上将圆弧分成3等分其点为1、2、3、4选取钣料面积(斜长+a-δ)×(斜长+b)。以O为圆心10为展开半径画圆弧(图36 b)按扇形坐标法,画出
Sixth, the common development of machine tool sheet metal parts Sheet metal parts are mostly sheet metal parts, edges and corners, the shape of less symmetry, most of the calculation method, due to more components, the following describes some of the typical components of the expansion (each figure has Expand the graph and introduce its calculation method if necessary): 1. Right-angle expand the legend (Figure 26). 2. Bevel expand the legend (Figure 27). 3. Lamps angled to expand the legend (Figure 28,29). 4. Expand two-sided rectangular arc angle legend (Figure 30,31). 5. Door angle expand the legend (Figure 32,33). 6. Cabinet Corner Expand Legend (Figure 34, 35). 7. Both straight, sloped members unfold (Figure 36). The components shown in Figure 36a can be unrolled with monoliths and uncoiled. (1) monolith expansion: in the front view of Figure 36a to make the expansion radius (take the plate thickness center), in the top view of the arc is divided into three equal points for its 1,2,3,4 Select sheet area ( Oblique length + a-δ) × (Oblique length + b). O as the center of the circle 10 for the development of arc radius (Figure 36 b) according to fan-shaped coordinate method, draw