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Machining method for hollow transmission shafts

A processing method and transmission shaft technology, applied in the field of mechanical processing, can solve the problems of failing to pass the torsional fatigue test and dynamic balance test, and the structure of metal materials does not meet the requirements, so as to reduce production costs, improve production efficiency, and simplify the processing process Effect

Inactive Publication Date: 2016-04-27
SHAANXI YIPINDA PETROCHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the deformation caused by welding and the metal structure of the welding part does not meet the requirements, it cannot pass the l000N·m torsion fatigue test and dynamic balance test

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The hollow transmission shaft processing method of the present invention comprises the following steps:

[0025] The first step is to prepare materials, select seamless pipes, leave 10mm processing allowance in the length direction, cold-draw seamless pipes, have no hidden dangers of cracks, allow wall thickness tolerances of less than 0.3mm, and full-length straightness errors of less than 0.3mm;

[0026] The second step is forging, upsetting the outer diameter and wall thickness of both ends of the tube blank, reaming, upsetting, and roll forming;

[0027] The third step is to turn and turn the outer circle of the workpiece until the light comes out, and leave a machining allowance of 2mm-5mm;

[0028] The fourth step is turning, taking the outer circle of the turning as the positioning reference, one clamp and one support, turning the inner hole at the right end of the workpiece, leaving a machining allowance of 1mm-2mm in the length direction;

[0029] The fifth st...

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Abstract

The invention relates to the machining field, in particular to a machining method for hollow transmission shafts. The machining method for the hollow transmission shafts comprises the steps of preparing material, selecting seamless tubes, preserving the machining allowance of 10 mm in the length direction and cold-drawing the seamless tubes, wherein the hidden danger of cracks is avoided, the wall thickness tolerance is smaller than 0.3 mm, and the overall straightness error is smaller than 0.3 mm; forging and upsetting the outer diameters and the wall thickness of the two ends of tube blanks and carrying out chambering, upsetting and rolling formation; carrying out turning and one clamping and one supporting with outer turned circles as the locating basis, turning inner holes of the right ends of work-pieces and preserving the machining allowance of 1-2 mm in the length direction; carrying out turning and one clamping and one supporting with outer circles of the work-pieces as the locating basis, drilling and expanding the inner holes to D of the required size, adopting deep hole drilling, removing a carriage in a lathe, installing a drill stem fixing base on the large carriage and connecting a drill stem to a special reamer bit, wherein high pressure oil enters the drill stem from the tail part of the drill stem and is sprayed from a cutting edge of the bit. According to the invention, the machining process is simple, manufacturing is easy, the machining quality and the dimensional accuracy of the work-pieces can be guaranteed, the production efficiency can be improved, and the production cost can be lowered.

Description

technical field [0001] The invention relates to the field of mechanical processing, in particular to a processing method for a hollow transmission shaft. Background technique [0002] The car hollow drive shaft is improved and developed on the basis of the traditional car drive shaft. It can transmit high-power torque and has good dynamic balance performance when running at high speed. However, due to the particularity of the structure, the processing performance requirements of the car hollow drive shaft: need Passed 1000N·ml00000 forward and reverse torsion tests; under the premise of ensuring the coaxiality of the outer circles of each gear, the wall thickness tolerance of the middle part of the part is not greater than 0.15mm. At the beginning of the trial production, due to the special structure of the middle hole, considering the difficulty of the overall processing, the part blank is composed of three components, the left, the middle and the right. The left and right...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/14
CPCB23P15/14B23P2700/50F16C3/02
Inventor 李长英
Owner SHAANXI YIPINDA PETROCHEM CO LTD
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