Continuous casting roller driving roller shaft spline repairing method

A repair method and continuous casting roll technology, which is applied in the field of spline repair and can solve problems such as scrapping of driving rolls

Active Publication Date: 2020-06-26
安徽马钢重型机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems in the prior art that the drive rollers with failed splines are usually scrapped, the present invention proposes a method for repairing the splines of the drive roller shafts of continuous casting rollers. The spline can meet the new product standard, avoiding re-making and saving costs

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  • Continuous casting roller driving roller shaft spline repairing method
  • Continuous casting roller driving roller shaft spline repairing method
  • Continuous casting roller driving roller shaft spline repairing method

Examples

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Effect test

Embodiment 1

[0050] A method for repairing the spline of the continuous casting roll driving roll shaft in this embodiment, such as Figure 1-2 shown, including the following steps:

[0051] Step 1. Finite element analysis: Simulate the meshing force of the spline, and analyze the distance between the strain generated by the stress and the root of the tooth, so as to determine the length of the old spline tooth removed before welding;

[0052]Step 2. Preheating: Since the material of the continuous casting roll is prone to defects such as cracks, the workpiece is preheated before submerged arc automatic welding. The heating rate is 30-50°C / h, preheated to 250-350°C, and kept 1-2h. During local welding, local preheating treatment can be carried out with the torch flame on the repair welding place and its surrounding area of ​​75mm;

[0053] Step 3. Clean up the repaired welding surface: Thoroughly clean the repaired welding surface and the rust and other dirt within 25mm nearby;

[0054]...

Embodiment 2

[0071] The method for repairing the spline of the driving roller shaft of the continuous casting roller in this embodiment has the same basic structure as that in Embodiment 1, the difference and improvement are: in step 1, the analysis module of proe5.0 is used to simulate the meshing force of the spline 3 ,Such as Figure 4 As shown, the spline 3 torque T1 is calculated according to the calculation formula of the circumferential force, radial force and normal force, where T1=Fr, the torque T1 is converted into the load force, and the spline 3 pitch circle and the width of the tooth surface Add the load at the intersection of the directions, and make the stress, strain and displacement finite element model of the spline 3 after being subjected to the rotational moment. According to the deformation per unit length generated under the maximum stress, the distance between the strain caused by the stress and the root of the tooth is obtained by analysis. , so as to determine the ...

Embodiment 3

[0077] A method for repairing the spline of the continuous casting roller driving roller shaft in this embodiment, the basic structure is the same as that of Embodiment 2, the difference and improvement lies in that it also includes a pre-welding preparation step, including:

[0078] Step A, determination of welding materials:

[0079] i) Use Φ3.2mm flux-cored wire CY430 with SJ604 flux (or flux HJ260) to weld the transition layer, ensuring that the single side is about 3mm;

[0080] ii) Use Φ3.2mmH2Cr13 flux-cored welding wire with SJ604 flux (or flux HJ260) to weld the wear-resistant layer on the cover surface, and the welding direction reciprocates;

[0081] Step B, process specification: the flux is baked at 250° C. for more than 2 hours, and used after cooling out of the oven.

[0082] In this embodiment, considering the fusion of the spline 3 body and the welding material, the material of the continuous casting roll is 21CrMoV5, and the welding material should contain e...

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Abstract

The invention discloses a continuous casting roller driving roller shaft spline repairing method, and belongs to the technical field of spline repairing. The continuous casting roller driving roller shaft spline repairing method comprises the following steps that a welding material which is well welded and fused with a parent material and has chemical components close to those of the parent material is selected, integral surfacing is conducted to repair a spline, and after welding, a proper heat treatment mode is adopted to relieve stress and improve mechanical performance; and then stress analysis is carried out on the spline, the size of a stress-affected zone pitch tooth root is calculated, a finite element model is manufactured, the size of an outer circle of the spline subjected to overall turning is determined, and finally gear hobbing is carried out on the spline. The process of repairing the spline through the integral surfacing method comprises the steps of old tooth removing,integral surfacing and re-machining. According to the repairing method, the repaired spline can reach a new product standard, re-manufacturing is avoided, and the cost is saved.

Description

technical field [0001] The invention relates to the technical field of spline repair, in particular to a method for repairing the spline of a drive roller shaft of a continuous casting roll. Background technique [0002] The continuous casting roll is the core component of the continuous casting machine equipment. During the working process, the temperature is alternately cold and hot, and the gas and liquid are corrosive. The working environment of continuous casting rolls is extremely harsh, and they need to be replaced or repaired every 2-6 months depending on the installation location. Therefore, improving the quality and service life of continuous casting rolls will directly affect the maintenance cost, product quality and caster operating rate. Improving its regenerative life by reconditioning can result in significant savings in repair costs and downtime. The driving roller spline is DIN5480-W150x5x30x28x8s, which is different from the gear. The involute spline work...

Claims

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Application Information

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IPC IPC(8): B23P6/04
CPCB23P6/04
Inventor 程采金葛国华高安阳王成
Owner 安徽马钢重型机械制造有限公司
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