Method for Improving Spline Accuracy of Torsion Bar Shaft and Its Products

Abstract

The method for improving the spline accuracy of the torsion bar shaft is characterized in that the torque is transmitted to the middle section of the torsion bar shaft to drive the torsion bar shaft to rotate, and the hobbing cutter of the double-headed gear machine tool is used to simultaneously process the splines at both ends of the torsion bar shaft. Before machining, finely adjust the coaxiality and circular runout at both ends of the torsion bar shaft and improve the straightness and stiffness of the torsion bar shaft to improve the machining accuracy of the splines at both ends of the torsion bar shaft and reduce the deviation of the splines at both ends of the torsion bar shaft. Thereby, the precision series of the splines at both ends of the torsion bar shaft is improved. The invention overcomes the defect that the spline of the slender torsion bar shaft is easily deformed due to gravity and torque transmission during the processing of the spline, improves the stability of the torsion bar shaft during the spline processing, thereby improving the processing accuracy of the spline and reducing splines at both ends. The height deviation of the top circle of the key tooth and the angle deviation of the corresponding teeth make the angle deviation of the torsion arm connected with the spline not exceed 0.2°. The present invention also provides a torsion bar shaft processed by the method for improving the spline precision of the torsion bar shaft mentioned above.

Description

technical field [0001] The invention relates to a method for improving the spline precision of a torsion bar shaft and a product thereof, which are used for processing the spline at the end of the torsion bar shaft. Background technique [0002] According to the bogie design and process assembly requirements, there are currently three main modes of assembly of the torsion bar shaft and the torsion arm at home and abroad: 1) The torsion arm and the torsion bar shaft are interference fit through the shrink-fit cylindrical surface. After this structure is assembled, the torsion bar The shaft and torsion arm cannot be disassembled, and if the interference of the torsion arm and torsion bar shaft of this structure is not enough, it is easy to slip in the circumferential direction, and it is also easy to slip under the condition of large ultimate vertical load; 2) torsion arm and torsion bar The shaft is fit through the spline gap, and then the torsion arm and the torsion bar shaf...

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Problems solved by technology

[0004] The method for improving the spline accuracy of the torsion bar shaft and its products provided by the present invention improve the processing method in which one end of the torsion bar shaft transmits the torque and the other end processes the splines in the current technology, to transmit the torque in the middle and process the splines at both ends synchronously. finely adjust the coaxiality and circular runout at both ends of the torsion bar shaft before processing to ensure that the coaxiality and circular runout of the spline addendum circles processed at both ends are the same, and by improving the straight line of the torsion bar shaft before processing It overcomes the defect that the spline of the slender torsion bar shaft is easily deformed due to gravity and torque transmission during the processing of the spline, and improves the stability of the torsion bar shaft during the spline processing, thereby improving the processing accuracy of the spline and reducing the two The height deviation of the tip circle of the spline at the end and the angle deviation of the corresponding teeth make the angle deviation of the torsion arm connected with the spline not exceed 0.2°

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