Каталог Tungaloy зубофрезерование - страница 28

HOB SOLUTIONS General Description The Tungaloy hobs are the result of continuous further development by our engineers. The experience and individual requirements of our customers were carefully included in the development and conception. These tools allow an economical machining of gears from module 6 and upwards. With the application of carbide inserts a high chip removal can be achieved at high cutting speeds. Hobbing of a helical gear Tungaloy hobs consist of individual segments which are positioned by means of high-precision cross slots. Large fitting surfaces allow us form- fit support of each segment in the spiral. These segments are connected with clamping screws via two end caps. Because a 360° spiral forms a segment, the production tolerances within one rotation are minimized, which has a positive effect on the quality class of the hobs. The Tungaloy segment design makes an extension of the tool - an enlargement of the cutting length – comparatively simple. Only longer pull bars are required. Moreover, easy assembly and disassembly is guaranteed. With the further development of the insert with an inclined bore the problem of exchanging an insert has also been solved. It is now possible to exchange the insert with a standard screwdriver while the hob is assembled. A further advantage is that the position of the insert can be exactly defined because of the inclined bore. The insert can no longer be inadvertently assembled incorrectly. Furthermore, a larger thread percentage contact area can be achieved thanks to this inclined position of the insert screw which stabilizes the insert pocket as well as the tool itself. 28