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  • Torsional error tolerance

    Torsional error tolerance

    20 Nov 2017

    Hob vertical feed direction and gear box bore axis direction deviation too much. When machining helical gears, there is additional movement is not correct (1) For machine tools and fixtures: a: column triangle rail and table axis is not parallel b: T...

  • Tooth angle is wrong

    Tooth angle is wrong

    13 Nov 2017

    The reason:   1) Hob  angle error is too large.   2) Hob grinding, the radial error of the front blade surface.   3) Hob mounting angle error. Countermeasures:  1) reasonable choice hob accuracy.   2) control hob grinding quality.   3) Re-adjust the ...

  • Blade finishing

    Blade finishing

    06 Nov 2017

    The finishing steps are:    1 that the blade has been grinding good (no spark), then do not give feed, let the knife reciprocate a few trips on their own, the number of trips depending on the length of the blade, short stroke less.    2. Remove the b...

  • High speed steel tool material characteristics

    High speed steel tool material characteristics

    01 Nov 2017

       High-speed steel is a high-alloy steel with the addition of tungsten, molybdenum, chromium, vanadium and other alloying elements. High-speed steel has a high strength, bending strength of the general carbide 2 to 3 times; toughness is also high, s...

  • The beating of the ring gear is extremely poor

    The beating of the ring gear is extremely poor

    30 Oct 2017

    The center of the workpiece bore does not coincide with the center of rotation of the machine table   The reason A   related machine tools, fixtures:   1) Worktable radial runout large   2) mandrel wear or radial runout large   3) the upper and lower...

  • Tooth profile periodic error

    Tooth profile periodic error

    25 Oct 2017

    Reason   1) After the hob is installed, the radial runout or the axial movement is large   2) Machine table rotation is not uniform   3) Cross-wheel or sub-tooth exchange gear installation eccentric or tooth surface bump   4) The turret skateboard is...