CN105710497A - Splicing technology of H-shaped steel - Google Patents

Abstract

The invention discloses a splicing technology of H-shaped steel. The splicing technology comprises the following steps of (1) performing preparation before splicing; (2) processing bevels; and (3) performing splicing: (3.1) performing appropriate backward deformation on splicing plates with single V-shaped bevels during assembly, so as to guarantee that steel plates after being welded are as level as possible; (3.2) performing tack welding, wherein tack welding needs to be performed by a qualified welding worker, used welding materials need to be equivalent to formal welding, the quality requirements of welding seams of the tack welding need to be the same as those of final welding seams, the thickness of the welding seams of the tack welding does not exceed two thirds of the designed thickness of the welding seams preferably, the length of the welding seams of the tack welding is preferably larger than 40mm, the intervals are preferably 500-600mm, and arc craters need to be fully filled; (3.3) mounting run-on plates and arc blowout plates at two ends of spliced seams of the steel plates in a welding manner, wherein the materials and bevel forms are the same as those of formal weldments, the length is two times greater than the thickness of the plates and is not smaller than 100mm, the width is larger than 80mm, and the thickness is not smaller than 10mm. The splicing technology disclosed by the invention is reasonable in working procedure, and low in manufacturing cost, parameters are reasonable and coordinative in collocation, and the product quality and the production efficiency can be effectively improved.

Description

A kind of splicing process of H profile steel

Technical field

The present invention relates to the splicing process of a kind of H profile steel.

Background technology

The splicing process of existing H profile steel exists that procedure arrangement is unreasonable, operation is various, and technological parameter selects unreasonable, and the collocation of each technological parameter is unreasonable and operator's skill requirement is higher so that production cost is higher, product quality is on the low side, yield rate is not high.

Summary of the invention

Because the drawbacks described above of prior art, the technical problem to be solved be to provide a kind of operation rationally, the splicing process of the H profile steel of low cost of manufacture.

For achieving the above object, the invention provides

The splicing process of a kind of H profile steel, comprises the steps:

1), the preparation before jigsaw

1.1) steel plate being rule, after splicing, the surplus of length direction is 30mm；

1.2) wing plate splicing length is no less than 2 times of plate width, and web splice width is no less than 300mm, and length is no less than 600mm；When wing web is intended to splice, it should be noted that should not spell on same cross section, splicing welding joint at least should stagger more than 200mm mutually；

2), retaining wall on slope:

(1) adopting semi auto cutting machine that groove is processed, groove type answers the requirement of the technological documents such as strict implement process examination book, design drawing.

(2) line of cut of steel plate should meet the following requirements with the tolerance of number stockline: hand cut: ± 1.5mm；Semi-automatic cutting: ± 1.0mm；

(3) tolerance of gas cutting: evenness of cutting surface is 0.05t, and not should be greater than 2.0mm；Depth of cutting veins is 0.3mm；Local notch depth is 1.0mm；

(4) clean for (to-be-welded region) polishing within the scope of groove face and groove both sides 20mm and maintenance are dried, must not have oil, rust and other dirt；

3), splicing；

3.1) for the jigsaw of single double V-groove, during assembling, should there is suitable reversible deformation, smooth as far as possible with steel plate after ensureing welding；

3.2) tack welding: tack-weld must be served as by qualification welder, welding material used should be suitable with formal welding；Tack welding weld seam should have identical prescription with final weld seam；Tack welding throat depth is no more than the 2/3 of design throat depth, and tack welding fusion length is preferably greater than 40mm, and interval is preferably 500～600mm, and should fill up arc crater；

3.3) steel plate piece two ends welding equipment run-on tab and arc-extinguishing plate, its material and groove type should be identical with formal weldment, and its length should be 2 times of thickness of slab and is not less than 100mm, and its width should be greater than 80mm, and thickness should be not less than 10mm.

The invention has the beneficial effects as follows: operation of the present invention is reasonable, low cost of manufacture, each parameter collocation reasonable coordination, it is possible to be effectively improved product quality and production efficiency.

Detailed description of the invention

Below in conjunction with embodiment, the invention will be further described:

The splicing process of a kind of H profile steel, comprises the steps:

1), the preparation before jigsaw

1.1) steel plate being rule, after splicing, the surplus of length direction is 30mm；

1.2) wing plate splicing length is no less than 2 times of plate width, and web splice width is no less than 300mm, and length is no less than 600mm；When wing web is intended to splice, it should be noted that should not spell on same cross section, splicing welding joint at least should stagger more than 200mm mutually；

2), retaining wall on slope:

(1) adopting semi auto cutting machine that groove is processed, groove type answers the requirement of the technological documents such as strict implement process examination book, design drawing.

(2) line of cut of steel plate should meet the following requirements with the tolerance of number stockline: hand cut: ± 1.5mm；Semi-automatic cutting: ± 1.0mm；

(3) tolerance of gas cutting: evenness of cutting surface is 0.05t, and not should be greater than 2.0mm；Depth of cutting veins is 0.3mm；Local notch depth is 1.0mm；

(4) clean for (to-be-welded region) polishing within the scope of groove face and groove both sides 20mm and maintenance are dried, must not have oil, rust and other dirt；

3), splicing；

3.1) for the jigsaw of single double V-groove, during assembling, should there is suitable reversible deformation, smooth as far as possible with steel plate after ensureing welding；

3.2) tack welding: tack-weld must be served as by qualification welder, welding material used should be suitable with formal welding；Tack welding weld seam should have identical prescription with final weld seam；Tack welding throat depth is no more than the 2/3 of design throat depth, and tack welding fusion length is preferably greater than 40mm, and interval is preferably 500～600mm, and should fill up arc crater；

3.3) steel plate piece two ends welding equipment run-on tab and arc-extinguishing plate, its material and groove type should be identical with formal weldment, and its length should be 2 times of thickness of slab and is not less than 100mm, and its width should be greater than 80mm, and thickness should be not less than 10mm.

Claims (1)

1. a splicing process for H profile steel, is characterized in that: comprise the steps:

1), the preparation before jigsaw

1.1) steel plate being rule, after splicing, the surplus of length direction is 30mm；

1.2) wing plate splicing length is no less than 2 times of plate width, and web splice width is no less than 300mm, and length is no less than 600mm；When wing web is intended to splice, it should be noted that should not spell on same cross section, splicing welding joint at least should stagger more than 200mm mutually；

2), retaining wall on slope:

(1) adopting semi auto cutting machine that groove is processed, groove type answers the requirement of the technological documents such as strict implement process examination book, design drawing；

(2) line of cut of steel plate should meet the following requirements with the tolerance of number stockline: hand cut: ± 1.5mm；Semi-automatic cutting: ± 1.0mm；

(3) tolerance of gas cutting: evenness of cutting surface is 0.05t, and not should be greater than 2.0mm；Depth of cutting veins is 0.3mm；Local notch depth is 1.0mm；

(4) clean for polishing within the scope of groove face and groove both sides 20mm and maintenance are dried, must not have oil, rust and other dirt；

3), splicing；

3.1) for the jigsaw of single double V-groove, during assembling, should there is suitable reversible deformation, smooth as far as possible with steel plate after ensureing welding；

3.2) tack welding: tack-weld must be served as by qualification welder, welding material used should be suitable with formal welding；Tack welding weld seam should have identical prescription with final weld seam；Tack welding throat depth is no more than the 2/3 of design throat depth, and tack welding fusion length is preferably greater than 40mm, and interval is preferably 500～600mm, and should fill up arc crater；

3.3) steel plate piece two ends welding equipment run-on tab and arc-extinguishing plate, its material and groove type should be identical with formal weldment, and its length should be 2 times of thickness of slab and is not less than 100mm, and its width should be greater than 80mm, and thickness should be not less than 10mm.