Once cold extrusion shaping method of automobile power steering gear jacketed screw and its multiple key and oil distributing groove

A power steering gear and screw technology, applied in steering gear, steering mechanism, fluid steering mechanism, etc., can solve the problems of repositioning in the circumferential direction, affecting production efficiency, and many processing procedures, so as to ensure relative position accuracy and dimensional accuracy, The effect of improving production efficiency and reducing production cost

Inactive Publication Date: 2004-11-10
马福生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No matter which processing method is used, there is a problem of repositioning in the circumferential direction. In addition, due to factors such as tool wear, it is difficult to ensure the relative position accuracy and dimensional accuracy of the spline and the oil groove.
In addition, due to the large number of processing procedures, the production efficiency is affected and the production cost of parts is increased.

Method used

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  • Once cold extrusion shaping method of automobile power steering gear jacketed screw and its multiple key and oil distributing groove
  • Once cold extrusion shaping method of automobile power steering gear jacketed screw and its multiple key and oil distributing groove
  • Once cold extrusion shaping method of automobile power steering gear jacketed screw and its multiple key and oil distributing groove

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Experimental program
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Effect test

Embodiment Construction

[0011] As shown in Figure 1 and Figure 2, a steel sleeve B is embedded in the upper end of the screw, the upper end surface of the steel sleeve B is ground together with the upper end surface of the screw rod, the lower end surface is flush with the upper end of the oil tank C, the inner diameter is equal to the diameter of the top circle of the oil tank C, and the outer diameter d 1 Greater than the root circle diameter d of the oil tank C 2 2-4mm, press fit is used between the steel sleeve B and the screw hole.

[0012] As shown in Figure 1 and Figure 3, the punch has extrusion teeth E and F for extrusion oil groove C and extrusion spline D on the position opposite to the spline and oil groove. The parts are processed on the press, and when the punch enters the screw, the oil groove C and the spline D are squeezed out at the same time. The cylindrical part G at the lower end of the punch enters the screw bearing hole H to play a guiding role during the extrusion process. ...

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Abstract

A processing method for making the sleeved screw arbor of power steering gear for car and its limiting spline and oil distributing slot by one-shot cold extrusion features that a steel sleeve is embedded in upper end of the screw arbor, the said steel sleeve has its upper end face flushed with the upper end face of screw arbor, the lower end face flushed with the upper end of oil slot, its internal diameter equal to the top diameter of oil slot and its external diameter greater than the root diameter of oil slot, and a male die is used for cold extrusion. Its advantages are high precision, high productivity and low cost.

Description

(1) Technical field [0001] The invention relates to a processing method for an automobile hydraulic power steering screw, its limiting splines and an oil distribution groove, in particular to a processing method for one-time cold extrusion forming of an automobile hydraulic power steering gear sleeve screw, its limiting splines, and an oil distribution groove. (2) Background technology [0002] At present, the screw rods of automobile power steering gears are all integral, and there are mainly two methods for processing the limit splines and oil distribution grooves of the screw rods. One method is to first process the limit spline by extrusion, and then position the limit spline on the flexing machine to cut the oil distribution groove. Each time a groove is cut, each groove needs to be re-indexed and clamped. Another method is also to locate with splines, and use a finger milling cutter to mill grooves on a milling machine. No matter which processing method is used, there...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D53/10B62D3/00B62D5/06
Inventor 马福生
Owner 马福生
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