Refabrication method of waste chain wheels for mining

A remanufacturing and sprocket technology, which is applied in the field of remanufacturing of mine waste sprockets, can solve problems affecting equipment transmission accuracy, low chain socket shape accuracy, and affecting chain meshing, etc., to improve repair efficiency and product consistency , quality and reliable effect

Inactive Publication Date: 2013-02-13
NINGXIA TIANDI BENNIU IND GRP
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  • Application Information

AI Technical Summary

Problems solved by technology

The repair process of the traditional sprocket does not remove the hidden danger of fine fatigue cracks in the fatigue layer, the efficiency of surfacing is low, the s...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Select the waste sprocket, and select the waste sprocket without broken teeth and fatigue cracks;

[0020] (2) Compile the CNC machining program according to the shape of the waste sprocket chain socket, and carry out milling processing by a CNC high-speed milling machine to remove the fatigue layer and hardened layer of irregular wear, and the processing depth is 15mm equidistantly processed on the basis of the original chain socket size;

[0021] (3) Install the waste sprocket on the welding positioner, cooperate with the welding robot, adopt the melting electrode gas shielded welding process, and use the surfacing material GFC-103 to carry out surfacing welding layer by layer. The welding requirements are before the back weld seam is pressed 1 / 3 of the first pass welding seam; among them, the chain socket of the sprocket is welded symmetrically, and the thickness of the welding layer is 4mm higher than that of the normal chain socket, that is, the chain socket of ...

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Abstract

The invention relates to a refabrication method of waste chain wheels for mining. The refabrication method is characterized by including the following steps that (1) the waste chain wheels are selected and waste chain wheels which do not have broken teeth and fatigue cracks are picked out; (2) the waste chain wheels are milled by a numerical control high-speed milling machine according to the chain nest shape of waste chain wheels, irregularly-abraded fatigue layers and hardening layers are removed, the depth of equidistant machining based on the size of an original chain nest is 12-18 mm; (3) the waste chain wheels are arranged on a welding positioner and are matched with a welding robot, consumable electrode gas is used to protect welding technology, build-up-welding materials are used to achieve build-up welding layer by layer, welding requirements are that a back pass weld covers 1/3-2/5 of a front pass weld; (4) the build-up-welded chain wheel nest is milled by the numerical control high-speed milling machine, and the original size of the milled chain nest is recovered. Tests prove that according to the method, the repairing efficiency of the waste chain wheels can be obviously improved, the repaired wheel chains are reliable in quality, and the homogeneity of products is good.

Description

technical field [0001] The invention relates to a method for remanufacturing waste sprockets used in mines. Background technique [0002] Mining sprocket is an important part of mining scraper conveyor and reloader transmission. The traction chain of the conveyor is driven by a sprocket. When the sprocket rotates, the teeth of the sprocket mesh with the chain ring in turn to drag the scraper chain to move continuously to play the role of conveying; the sprocket shaft group also bears the maximum torque of the entire equipment during work, and mainly bears the sliding And rolling pressure, bearing pulsating load and additional load, the working conditions are very harsh, and the failure form is mainly the wear and tear failure of the sprocket chain socket. The sprocket is a vulnerable part, and its life is only 1 / 4 to 1 / 3 of the life of the whole machine. [0003] The repair process of the traditional sprocket is to directly use welding wire to carry out manual surfacing on...

Claims

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Application Information

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IPC IPC(8): B23P6/00
Inventor 宋智丽王荣武
Owner NINGXIA TIANDI BENNIU IND GRP
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