2015-08-21
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| Shaft diameter d | Grooves | Rings | |||
| d 1 | B | s | b | l | |
| 18.6 | 1.4 | 1.2 | 3.2 | 3.0 | |
| 23.5 | 3.6 | ||||
| 28.5 | 4.0 | ||||
| 33.0 | 1.9 | 1.7 | 4.9 | 6.0 | |
| 37.5 | 5.5 | ||||
| 42.5 | |||||
| 47.0 | 2.2 | 2.0 | 6.0 | ||
| 52.0 | |||||
| 57.0 | 6.5 | ||||
| 62.0 | 2.8 | 2.5 | 7.0 | ||
| 67.0 | |||||
| 72.0 | 8.0 | ||||
| 76.5 |
Possible constructions of welded drums are given in Fig.13.2. The rim and disks of the drum are made of steel sheet of thickness 8 mm. Ribs of the drum are produced from the strip of width 40 mm and thickness 6 mm.
Fig. 13.2. Welded drums
For determination sizes of the conveyer sprocket it is necessary to choose a pull chain (table 13.6).
Dimensions of the pull chain sprocket are determined in the following way:
– addendum circle diameter Da = D +0.25∙ D 1+6 mm;
– dedendum circle diameter Df = D – D 1;
– web thickness b =0.9∙ B bush;
where D is the nominal pitch circle diameter of the sprocket (look through the specification for the course paper)); D 1 is the diameter of the roller; Bbush is the bush width.
13.5. Design the welded frame.
Welded frames are used for mounting assembly units. They should correspond to certain requirements of accuracy to provide needed relative disposition of assembly units. Besides, the welded frame should have high rigidity.
Table 13.6
