Shallow Tan Zhui spends the design of spline core axis to make

In 02mm, relatively other part is right in the spare parts fiducial public errand asks to want small, think fiducial changeover is feasible accordingly. Spline of the gear of beautiful to having involute keyhole, inside and outside is covered, the spare parts such as land, all serve as a design in order to spend keyhole commonly fiducial, also be the reference circle that forms with tooth flank is a design actually fiducial, how to accomplish craft fixed position is standard with the design fiducial and unified, in tool production respect still has certain difficulty. So, at present a lot of units are handling this kind of craft to locate fiducial respect, still be the way that decides reference circle with deciding old way to replace, the rod of core of involute spline fixed position that uses old way to have taper namely will decide inside spline old way. The feasibility of 1 fiducial changeover can be denied have fiducial transition namely OK old way replaces reference circle to make fixed position fiducial, the key depends on both coaxial is spent whether achieve a requirement, for the spline that machines to broaching, the coaxial of the old way that basically is spline broach and reference circle is spent how, because broach decided to machine the precision of aperture of spare parts spline, basis " tensile technology condition " and actual measurement result, its coaxial spends a value to be in about 0.

In 02mm, relatively other part is right in the spare parts fiducial public errand asks to want small, think fiducial changeover is feasible accordingly. The design of design core axis of axis of core of 2 taper spline should consider stiffness on one hand, when making its are being machined, not easy below cutting knife action generation bends. In old way affirmatory already condition falls, should shorten as far as possible length: The dimension change that should consider spline Kong Dajing on the other hand and size of core axis taper, should be inside span of spline hole size still can wedge is close, and consider equipment size range of pipe bent even. Integrated above element, general core axis locates partial length takes 200 ～ 400mm. Additional, according to the dimension size of old way of axis of fixed position core, when Ø50mm of old way ≤ , core axis design is integral type: When old way > when Ø50mm, core axis design solders for fission type the structure is relatively ideal, its are basic the structure is shown like attached drawing place. Contact fixed position to there is old way only in axis of core of the spline when using, transverse tooth thickness of spline core axis must be decreased thin, reduce small amount ordinary control is comparing transverse tooth thickness of mark fiducial value small 0.

Inside limits of 9 ～ 1mm, below the circumstance of quality of the cone outside be not being affected at the same time, rolling cut of numerical value of requirement comparing par is deep 1.

5 ～ 2mm. The dimension of old way of spline core axis and public errand are decided really crucial to whole core axis, it is the key of success or failure, the beautiful keyhole that broaching machines, its are big by broach often old way decides the size of diameter, when reason asks to make broach, want to control its strictly old way dimension, with benefit at reducing the amount of spline core axis, raise rate of its repeated usage. The basis uses a case, material uses integral attune to come character for the core axis heat treatment of 40Cr 24 ～ 28HRC, old way surface quenchs to 42 ～ 46HRC, temper by dipping in water deep the method of 1 ～ 2mm, in order to assure its stiffness and wearability. Solder need to eliminate welding stress after solder of type core axis, be out of shape in case. Attached drawing 3 make reach the problem that in using, should note to be those who assure core axis to make precision, facilitate long grind, in axis of the core in making Kong Ying design is two upright centers 2 model. Transverse tooth thickness of spline core axis is due reduce small amount, only with assuring axis of core of the spline when using old way contacts fixed position. To raise the wearability of spline core axis, must locate to core axis the surface has heat treatment. Wear away to already appearing, the core axis that cannot continue to use, can adopt the idea that brushs plating hard chromium to try repair, film ply must exceed wear extent, so that can new treatment gives fixed position appearance. The cleanness of tool, workpiece spends immediate impact to machine precision, surface of fixed position of axis of central aperture, core has scrap, sundry etc, appear easily the unusual situation such as jumpy out of tolerance, the beard in using tries to notice. Additional, the tool should notice appropriate is custodial, best can upend condole is hanged deposit, lest appear,bend be out of shape, influence precision. CNC Milling