Processing cover flange and universal adjustable jig parts

This article describes the process flange and cover parts Universal adjustable jig machining industry in the United States to meet the requirements of flexible production design and the use of a new jig.
A. Jig structure and working principle

Processing cover flange and adjustable jig common parts of the structure shown in Figure 1.

1. Column 2. Open Bushing 3. Drilling template 4. Can be set for drilling
5. Fixed drill sleeve 6. Screw 7. Handle 8,9. Lock slider
10. Indexing Table 11. Scale ring 12. Bolt
1.3. Indexing ring gear 14. Jig body 15. Screw

Figure 1 Schematic jig

Drilling template three column one can turn around at any angle and can be different according to the thickness of the workpiece moved up and down along the column. Drilling template in the column on the location determined, with a cut to tighten the clamping device. Tangential clamping device shown in Figure 1, Ⅰ - Ⅰ section below, 8,9 for the two locking slide, pulling the handle 7 and tighten the screw 6, it will be opening clamping sleeve 2, which fixed drilling template position. 4 sets of equipment for drilling can be fixed within the drill sleeve 5. The length of the drill template shall be guaranteed around the column rotates, the axis lines can be set for drilling circular sweep of the fan-shaped path to pass the center of indexing table 10. Indexing table can rotate around the jig body 14, which is equipped with a 48 tooth with sub-degree ring gear 13. Indexing ring gear rotate in place, with a bolt 12 fixed. Indexing the table with jaw chuck to be within the workpiece positioning holes or cylindrical workpiece. 15 fixed with screws in the scale of indexing the table 11 on the ring engraved with 48 bisector, jigs also have a fixed body groove, can calculate the values of the sub-degree indexing.

2. Adjustment and use of drilling mode

Before drilling, drilling template release clamping device, according to the workpiece thickness will increase or decrease drilling template to the desired height. Insert a drill comprising a fixed diameter d1 of the standard test mandrel (shown in Figure 2) and three-jaw chuck clamping a diameter d2 at the standard test mandrel. Amount of the selected test block, gauge block thickness of H calculated by the formula: H = (D-d1-d2) / 2, where D is the workpiece to be machined hole diameter of attainment. Rotational drill template, drill kit test until a fixed mandrel and mandrel test of three-jaw chuck capacity between the blocks just let slip up, then tighten the drill template, drill mode in this position the centerline dimensions shall be processed decile hole diameter D.

1. Test mandrel (d1) 2. Amount of block 3. Test mandrel (d2)
Figure 2 to calculate the amount of block size test diagram of H values

After adjustment, remove the test mandrel, can be loaded can be set for drilling drilling. No. 1 drill holes completed, unplug the plug, turn indexing table, under the scale ring on the scale and the inscription on the jig body dividing lines, and sequential processing of the rest of the hole.
This versatile adjustable jig for the processing of attainment diameter ≤ 24mm, workpiece diameter ≤ 400mm hole center circle of the flange parts and a variety of end caps on the decile hole. Use is proved that the drilling mold has the following characteristics:
(1) a model multi-purpose, wide application, can be adapted to all kinds of flange and cover different parts of the decile Hole diameter;
(2) processing quality, and can meet the general precision hole diameter tolerance and the attainment angle tolerance requirements;
(3) Manufacturing flexibility is good, low cost, especially for the size of product range and specifications change frequently and more varieties of batch processing.