Novel welding method for stainless steel guide rail

Abstract

The invention discloses a novel welding method for a stainless steel guide rail. The novel welding method comprises the following steps: 1) blank preparation: preparing a guide rail blank according to the thickness of a finished product + 3mm, the width of the finished product + 10mm and the total length of the finished product + 100mm; pre-bending the guide rail blank; (2) procedure preparation is conducted, specifically, a guide rail is welded to an anti-deformation tool, the length of spot welding seams is 80-150 mm, and the spot welding seams are arranged at the interval of 50 mm; (3) preheating before welding; 4) surfacing a transition layer; 5) surfacing a surface layer; (6) postweld heat treatment; (7) the tool is dismantled; 8) first linear cutting: linearly cutting the side surface of the guide rail; (9) second linear cutting is conducted, specifically, the alloy surface of the linear cutting guide rail T800 or STL.6 is bright; (10) grinding; 11, third linear cutting, wherein linear cutting is conducted on assembly faces at the two ends of the guide rail and a C7 inclined face; 12, fourth linear cutting, wherein arc angles around the guide rail are cut; and 13) grinding. By means of the anti-deformation tool and pre-bending of the product, waste of product materials is greatly reduced; the manual and machining cost is saved, the welding efficiency is improved, and the welding quality is also improved.

Description

Technical Field

[0001] The invention relates to the field of welding, and in particular to a novel welding method for a stainless steel guide rail. Background Art

[0002] When welding long rails, the traditional welding method is to weld the long rails in sections and then assemble them. In this case, there is a serious waste and welding defects are easy to occur. The welding of long rails requires more than double the thickness of the parent material, or divide them into different small sections, which undoubtedly increases the welding cost and material cost.

[0003] Therefore, it is necessary to develop new methods for welding tracks in a targeted manner to reduce material costs and processing costs while improving welding quality. Summary of the invention

[0004] Purpose of the invention: In view of the shortcomings and defects of the prior art, the present invention provides a new welding method for stainless steel guide rails, which greatly reduces the waste of product materials through anti-deformation tooling and pre-bending of products, saves labor and machining costs, improves welding efficiency, and also improves welding quality.

[0005] Technical solution: A novel welding method for stainless steel guide rails of the present invention is characterized by comprising the following steps:

[0006] 1) Blank preparation: The guide rail blank is prepared according to the finished product thickness + 3mm, width + 10mm, and total length + 100mm; the guide rail blank is pre-bent;

[0007] 2) Process preparation: The guide rail is welded to the anti-deformation tooling, the spot welding weld length is 80mm-150mm, and a weld is set at an interval of 50mm;

[0008] 3) Preheating before welding: Preheating temperature before welding ≥ 200℃;

[0009] 4) Transition layer cladding: cladding the transition layer Co21 or STL.6 according to the process requirements of the drawing;

[0010] 5) Surface cladding: T800 or STL.6 cladding is carried out according to the process requirements;

[0011] 6) Post-weld heat treatment: raise both ends of the guide rail for heat treatment;

[0012] 7) Tooling removal: After the workpiece is completely cooled to room temperature after being taken out of the furnace, the tooling is removed;

[0013] 8) Wire cutting 1: Wire cutting guide rail side to drawing size requirements;

[0014] 9) Wire cutting 2: Wire cutting guide rail T800 or STL.6 alloy surface exposed to light;

[0015] 10) Grinding: Grinding on T800 or STL.6 alloy surface and back side;

[0016] 11) Wire cutting three: Wire cutting of the assembly surfaces at both ends of the guide rail and the C7 bevel to the required size;

[0017] 12) Wire cutting 4: cutting the arc angle around the guide rail;

[0018] 13) Grinding: The guide rail is polished to a bright finish to meet the roughness requirements of the drawing.

[0019] Wherein, the heat treatment temperature in step 6) is 720°C, the heating rate is 80°C / h, the temperature is kept for 4h, and the furnace is cooled.

[0020] Wherein, in the step 8), the side surface of the guide rail is a non-surfacing surface.

[0021] Wherein, in the step 13), after grinding, coding is performed according to the coding requirements of the list.

[0022] Wherein, the guide rail is made of stainless steel H321.

[0023] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: The present invention develops a new stainless steel rail welding method, which greatly reduces the waste of product materials through anti-deformation tooling and pre-bending of products. It also saves labor and machining costs, increases the pre-bending size of the long rail before welding, and then welds through the anti-deformation tooling, which greatly reduces the thickness of the welded plate, improves welding efficiency, and also improves welding quality. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described below in conjunction with specific implementation methods.

[0025] The novel welding method of the stainless steel guide rail of the present invention comprises the following steps:

[0026] 1) Blank preparation: The guide rail blank is prepared according to the finished product thickness + 3mm, width + 10mm, and total length + 100mm; the guide rail blank is pre-bent; the guide rail is made of stainless steel H321;

[0027] 2) Process preparation: The guide rail is welded to the anti-deformation tooling, the spot welding weld length is 80mm-150mm, and a weld is set at an interval of 50mm;

[0028] 3) Preheating before welding: Preheating temperature before welding ≥ 200℃;

[0029] 4) Transition layer cladding: cladding the transition layer Co21 or STL.6 according to the process requirements of the drawing;

[0030] 5) Surface cladding: T800 or STL.6 cladding is carried out according to the process requirements;

[0031] 6) Post-weld heat treatment: The two ends of the guide rail are raised for heat treatment; the heat treatment temperature is 720℃, the heating rate is 80℃ / h, the heat preservation is 4h, and the furnace is cooled;

[0032] 7) Tooling removal: After the workpiece is completely cooled to room temperature after being taken out of the furnace, the tooling is removed;

[0033] 8) Wire cutting 1: Wire cutting the side of the guide rail (non-welding surface) to the size requirements of the drawing;

[0034] 9) Wire cutting 2: Wire cutting guide rail T800 or STL.6 alloy surface exposed to light;

[0035] 10) Grinding: Grinding on T800 or STL.6 alloy surface and back side;

[0036] 11) Wire cutting three: Wire cutting of the assembly surfaces at both ends of the guide rail and the C7 bevel to the required size;

[0037] 12) Wire cutting 4: cutting the arc angle around the guide rail;

[0038] 13) Grinding: The guide rail is polished to meet the roughness requirements of the drawing;

[0039] 14) Coding: Coding shall be performed according to the list coding requirements.

[0040] The present invention develops a new type of stainless steel rail welding method, which greatly reduces the waste of product materials through anti-deformation tooling and pre-bending of products. It also saves labor and machining costs. The pre-bending size of the long rail is increased before welding, and then the anti-deformation tooling is used for welding, which greatly reduces the thickness of the welded plate, improves welding efficiency, and also improves welding quality.

Claims

1. A new welding method for stainless steel guide rails, characterized in that: The steps include: 1) Blank preparation: The guide rail blank is prepared according to the finished product thickness + 3mm, width + 10mm, and total length + 100mm; the guide rail blank is pre-bent; 2) Process preparation: The guide rail is welded to the anti-deformation tooling, the spot welding weld length is 80mm-150mm, and a weld is set at an interval of 50mm; 3) Preheating before welding: Preheating temperature before welding ≥ 200℃; 4) Transition layer cladding: cladding the transition layer Co21 or STL.6 according to the process requirements of the drawing; 5) Surface cladding: T800 or STL.6 cladding is carried out according to the process requirements; 6) Post-weld heat treatment: raise both ends of the guide rail for heat treatment; 7) Tooling removal: After the workpiece is completely cooled to room temperature after being taken out of the furnace, the tooling is removed; 8) Wire cutting 1: Wire cutting guide rail side to drawing size requirements; 9) Wire cutting 2: Wire cutting guide rail T800 or STL.6 alloy surface exposed to light; 10) Grinding: Grinding on T800 or STL.6 alloy surface and back side; 11) Wire cutting three: Wire cutting of the assembly surfaces at both ends of the guide rail and the C7 bevel to the required size; 12) Wire cutting 4: cutting the arc angle around the guide rail; 13) Grinding: The guide rail is polished to a bright finish to meet the roughness requirements of the drawing.

2. The novel welding method for stainless steel guide rails according to claim 1 is characterized in that: The heat treatment temperature in step 6) is 720°C, the heating rate is 80°C / h, the temperature is kept for 4h, and the furnace is cooled.

3. The novel welding method for stainless steel guide rails according to claim 1 is characterized in that: In the step 8), the side surface of the guide rail is a non-surfacing surface.

4. The novel welding method for stainless steel guide rails according to claim 1 is characterized in that: After grinding in step 13), coding is performed according to the coding requirements of the list.

5. The novel welding method for stainless steel guide rails according to claim 1 is characterized in that: The guide rail is made of stainless steel H321.