Tramcar guard rail surfacing hardening process

Abstract

The invention discloses a surfacing hardening process for a guardrail of a tramcar, and relates to the technical field of guardrail repair, the surfacing hardening process comprises the following process steps: S1, early-stage preparation: carrying out detailed inspection on the guardrail, and determining the wear degree and the repair area; s2, site construction is conducted, specifically, a repairing area is cleaned, and greasy dirt, rust and other impurities are removed; layer-by-layer stacking welding is carried out in the repairing area; the welding area is precisely polished, and the guard rail is recovered to the needed size; s3, quality inspection is conducted, specifically, the repaired guard rail is subjected to size inspection, and it is ensured that the safety standard is met; the repaired guard rail is subjected to appearance inspection, and it is ensured that a welding area is smooth and free of defects; and S4, follow-up maintenance is conducted, specifically, a regular inspection mechanism for repairing the guard rail is established, and potential problems are found and processed in time. According to the method, the high-wear-resistance alloy steel welding material is adopted, surfacing repair is conducted on the working edge of the abraded guard rail, and then the size of the repaired guard rail is recovered to be within the safety standard range by accurately controlling welding parameters and conducting milling or polishing treatment.

Description

Technical Field

[0001] The invention relates to the technical field of guardrail repair, and in particular to a surfacing hardening process for tram guardrails. Background Art

[0002] In the tram system, the turnout spacing is a key factor in ensuring the safe passage of trains. However, as the operating time increases, the guardrail will gradually approach the safety limit due to wear, affecting the normal operation of the tram.

[0003] The conventional method of adjusting the width of the wheel flange groove of the guardrail often requires destroying the roadbed structure, which is complex and time-consuming to construct. Therefore, the present invention aims to achieve rapid, in-situ repair of the guardrail, improve maintenance efficiency, and extend the service life of the guardrail. Summary of the invention

[0004] The object of the present invention is to provide a tram guardrail surfacing hardening process to solve the above-mentioned defects caused by the prior art.

[0005] A tram guard rail surfacing hardening process includes the following process steps:

[0006] S1: Preliminary preparation:

[0007] Conduct detailed inspection of worn guardrails to determine the degree of wear and repair areas;

[0008] S2: On-site construction:

[0009] Clean the repair area, remove oil, rust and other impurities until the metallic luster is exposed;

[0010] Perform layer-by-layer stacking welding in the repair area;

[0011] Precisely grind the welding area to restore the guardrail to the required size;

[0012] S3: Quality Check:

[0013] Conduct dimensional inspection on repaired guardrails to ensure they meet safety standards;

[0014] Perform a visual inspection on the repaired guardrail to ensure that the welding area is smooth and free of defects;

[0015] S4: Subsequent maintenance:

[0016] Establish a regular inspection mechanism for repairing guardrails to promptly identify and address potential problems.

[0017] Preferably, in S1, construction equipment and materials are prepared, including a welding machine, high wear-resistant alloy steel welding materials and grinding tools.

[0018] Preferably, in S2, the welding area as a whole is in the shape of an isosceles trapezoid that is short at the top and long at the bottom.

[0019] Preferably, in S2, manual submerged arc welding is used for continuous welding, and the welding current is 120-160 mA.

[0020] Preferably, in S4, necessary training is provided to enable maintenance personnel to master the technology of layer-by-layer stacking welding repair.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. Improve maintenance efficiency: The use of surfacing technology can significantly shorten the guardrail repair time and reduce the construction period.

[0023] 2. Reduce maintenance costs: Reduce the need for new guardrails, and reduce material costs and construction costs.

[0024] 3. Extend the life of the guardrail: The use of high wear-resistant alloy steel welding materials improves the wear resistance of the guardrail and extends its service life.

[0025] 4. Improve driving safety: Ensure that the turnout inspection interval size always meets safety standards and improve train operation safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A 3D image of the weld area on the worn guardrail.

[0027] Figure 2 This is an electron microscope image of the welding area on the worn guardrail.

[0028] Among them: 10-wear guard rail; 20-welding area. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0030] like Figure 1 to Figure 2 As shown, a tram guard rail surfacing hardening process includes the following process steps:

[0031] S1: Preliminary preparation:

[0032] Conduct detailed inspection of worn guardrails to determine the degree of wear and repair areas;

[0033] S2: On-site construction:

[0034] Clean the repair area, remove oil, rust and other impurities until the metallic luster is exposed;

[0035] Perform layer-by-layer stacking welding in the repair area;

[0036] Precisely grind the welding area to restore the guardrail to the required size;

[0037] S3: Quality Check:

[0038] Conduct dimensional inspection on repaired guardrails to ensure they meet safety standards;

[0039] Perform a visual inspection on the repaired guardrail to ensure that the welding area is smooth and free of defects;

[0040] S4: Subsequent maintenance:

[0041] Establish a regular inspection mechanism for repairing guardrails to promptly identify and address potential problems.

[0042] In this embodiment, in S1, construction equipment and materials are prepared, including a welding machine, high wear-resistant alloy steel welding materials, and grinding tools.

[0043] In this embodiment, in S2, the welding area is in the shape of an isosceles trapezoid that is shorter at the top and longer at the bottom.

[0044] In this embodiment, in S2, manual submerged arc welding is used for continuous welding, and the welding current is 120-160 mA.

[0045] In this embodiment, in S4, necessary training is provided to enable maintenance personnel to master the technology of layer-by-layer stacking welding repair.

[0046] Working principle of a tram guardrail cladding hardening process:

[0047] The guardrail cladding process uses highly wear-resistant alloy steel welding materials to perform cladding repairs on the working edge of the worn guardrail. The size of the repaired guardrail is then restored to within the safety standard range through precise control of welding parameters and subsequent milling or grinding.

[0048] Technical advantages of a tram guardrail cladding hardening process:

[0049] (1) Compared with the traditional frog area which uses a combination of connecting rails and guard rails, this new guard rail structure uses a submerged arc welding process on the grooved rail to change the groove width of the grooved rail, and directly meets the structural safety requirements with only one connecting rail.

[0050] (2) In-situ repair: There is no need to remove or replace the entire guardrail, and the repair can be carried out directly on site.

[0051] (3) Efficient and fast: Compared with traditional methods, the cladding process has a short construction period and greatly reduces the workload, which significantly reduces the cost of replacing guardrails.

[0052] (4) High quality: Stainless steel welding materials provide excellent wear resistance. Compared with the mechanical properties of the rail base material, the mechanical properties of the cladding area are enhanced (hardness, wear resistance), extending the service life of the guardrail.

[0053] (5) Flexibility: The welding amount can be flexibly adjusted according to the wear of the guardrail to ensure the repair accuracy.

[0054] Therefore, the embodiments disclosed above are only illustrative in all aspects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A tram guard rail surfacing hardening process, characterized in that: The process steps include: S1: Preliminary preparation: Conduct detailed inspection of worn guardrails to determine the degree of wear and repair areas; S2: On-site construction: Clean the repair area, remove oil, rust and other impurities until the metallic luster is exposed; Perform layer-by-layer stacking welding in the repair area; Precisely grind the welding area to restore the guardrail to the required size; S3: Quality Check: Conduct dimensional inspection on repaired guardrails to ensure they meet safety standards; Perform a visual inspection on the repaired guardrail to ensure that the welding area is smooth and free of defects; S4: Subsequent maintenance: Establish a regular inspection mechanism for repairing guardrails to promptly identify and address potential problems.

2. A tram guard rail surfacing hardening process according to claim 1, characterized in that: In S1, construction equipment and materials are prepared, including welding machines, high wear-resistant alloy steel welding materials and grinding tools.

3. The surfacing hardening process for tram guardrail according to claim 1 is characterized in that: In S2, the overall welding area is in the shape of an isosceles trapezoid that is short at the top and long at the bottom.

4. The surfacing hardening process for tram guard rails according to claim 1 is characterized in that: In S2, manual submerged arc welding is used for continuous welding, and the welding current is 120-160mA.

5. The surfacing hardening process for tram guard rails according to claim 1 is characterized in that: In S4, necessary training is provided to enable maintenance personnel to master the technology of layer-by-layer stacking welding repair.

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