Shaping is a gear cutting process where the cutting tool is in the form of a spur/helical gear. The gear teeth are relieved to form cutting edges. The cutting tool and the gear blank mesh on parallel axes as if they are two completed gears in pairs with tool gear having zo teeth and the work piece having z teeth. It means if the tool rotates at n’o rpm, the work piece is made to rotate at n’ rpm, such that –
n' = n’o X zo/z
The tool is fed downward at a feed rate f which is dependent on the material being cut (assuming a vertical configuration of the shaping machine). During the downward stroke, cutting takes place. On the upward stroke, the tool disengages from the job. This disengagement may take place with the table moving out of position. On some newer machines nowadays, the whole spindle assembly moves out of disengagement from the work piece. Up-down axial motion of the tool is normally with crank or lever arrangement. From these basic motions (Fig. 8), it will be seen that shaping is an intermittent generating process as compared with hobbing which is a continuous generating process.
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I was browsing through blogs and got hold of yours. I think this is a much sorted text and I would like to follow up on this.While gears are available in many shapes, sizes and designs especial tools are need to cut, carve and shape these gears. As simple as gears may be, the gear shaper cutters are as complex machines with specialised gear cutters at heart of the machinery. These shaper cutters are highly versatile in their functions.
India is a growing country for all kind of Industrial Machines.. Thanks for sharing
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Great blog nice n useful information , it is very helpful for me , I realy appreciate thanks for sharing. I would like to read more information thanks.
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