Crankshaft restoring method

A repair method and crankshaft technology, applied in the direction of the crankshaft, etc., can solve the problems of difficult to control welding quality, inability to process, not durable, etc.

Active Publication Date: 2014-05-28
CHINA COAL XINJI ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Emulsification pump crankshaft, sprocket shaft and other drive shafts work under heavy load conditions, so several failure forms such as bearing wear, thread segment wear, seal groove wear, and ring groove wear often occur, while the flowers in the middle and both ends of the shaft The key teeth are all in good condition. This type of shaft has great value for repair and reuse. Most of the shaft tolerance repairs in the existing technology use axle shafts, hot-fitting and inlaying complete sets, and fine turning to meet the tolerance requirements. It has been found through shaft repair practice that most shafts are due to design and manufacturing. When the diameter difference between adjacent shaft segments is small and limited by the structure of the keyway position, spring position, and shaft inner segment, the whole set of shr

Method used

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Experimental program
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Effect test

Embodiment 1

[0030] figure 1 It is a schematic diagram of the spline shaft before being repaired by a crankshaft repair method disclosed in the present invention. As shown in the figure, a crankshaft repair method of the present invention repairs the spline shaft. The repair steps are as follows:

[0031] (1) When milling the damaged part of the spline shaft, use a milling cutter to fix it, rotate the arc surface of the spline shaft, install a detachable rotating handle at the end of the spline shaft, and mill out the damaged part of the semicircular surface 1 of the spline shaft. Part of the semi-circular surface is arc groove-shaped, retaining the spring position of the spline shaft and the keyway 2; accurately grasping the arc surface of the shaft to be milled, controlling the damaged part of the shaft to be repaired, and avoiding the arc surface of the shaft to be milled by mistake. Wrong milling, improve accuracy;

[0032] (2) Support the bearing stands 3 at both ends of the spline s...

Embodiment 2

[0036] A crankshaft repair method of the present invention repairs the emulsification pump crankshaft, and the repair steps are as follows:

[0037] (1) When milling the damaged part of the crankshaft of the emulsification pump, fix it with a milling cutter, rotate the arc surface of the crankshaft of the emulsification pump, install a detachable rotating handle at the end of the crankshaft of the emulsification pump, mill out the partially damaged semicircular surface of the crankshaft of the emulsification pump, and mill out Part of the semicircular surface is in the shape of an arc groove, and the two sides of the keyway are reserved; accurately grasp the arc surface of the shaft to be milled, control the damaged part of the emulsification pump crankshaft, avoid the arc surface of the shaft to be milled by mistake or wrong milling, and improve Accuracy;

[0038] (2) Support the bearing platforms at both ends of the crankshaft of the emulsification pump and the middle part ...

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PUM

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Abstract

The invention discloses a crankshaft restoring method which includes milling and embedding inner segments of a to-be-restored shaft, manufacturing of a semicircular sleeve, fixing of the semicircular sleeve in an arc groove of the to-be-restored shaft, welding and finish machining. Restoring steps includes: (1) milling off partial damaged semicircular face of the to-be-restored shaft to enable the partial semicircular face to be in a shape of the arc groove, and retaining a snap spring position and a keyway of the to-be-restored shaft; (2) supporting the middle and bearing stands at two ends of the to-be-restored shaft; (3) manufacturing a closed shaft sleeve, halving the closed shaft sleeve to make the semicircular sleeve, adjusting positions of a keyway on the semicircular sleeve and the keyway on the to-be-restored shaft, and welding; (4) subjecting the to-be-restored shaft with the semicircular sleeve welded to finish machining. According to the technical scheme, abrasions can be restored to the maximum extent to restore a full size, restoring of inner abrasion bosses in the crankshaft can be guaranteed, and normality in use of the restored shaft is guaranteed.

Description

technical field [0001] The invention belongs to the field of mechanical processing, and more specifically, the invention relates to a method for repairing a crankshaft. Background technique [0002] Emulsification pump crankshaft, sprocket shaft and other drive shafts work under heavy load conditions, so several failure forms such as bearing wear, thread segment wear, seal groove wear, and ring groove wear often occur, while the flowers in the middle and both ends of the shaft The key teeth are all in good condition. This type of shaft has great value for repair and reuse. Most of the shaft tolerance repairs in the existing technology use axle shafts, hot-fitting and inlaying complete sets, and fine turning to meet the tolerance requirements. It has been found through shaft repair practice that most shafts are due to design and manufacturing. When the diameter difference between adjacent shaft segments is small and limited by the structure of the keyway position, spring posi...

Claims

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Application Information

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IPC IPC(8): B23P6/00
CPCB23P6/00F16C3/06
Inventor 陈伟汪夕伟刘俊生
Owner CHINA COAL XINJI ENERGY CO LTD
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