阅读说明：本技术 一种用于片头子口的二氧焊接工艺 (Dioxygen welding process for sheet head seam allowance ) 是由 于克跃 于 2019-05-22 设计创作，主要内容包括：本发明公开了一种用于片头子口的二氧焊接工艺,S1、子母口片头预处理：对子母口片头制作坡口,使得片头子口与片头母口之间呈V型对接坡口,对子母口片头焊接坡口及坡口两侧20-30mm的表面用砂纸打磨出金属光泽,涉及散热器加工技术领域。该用于片头子口的二氧焊接工艺,通过采用二氧化碳气体环境下焊接,使得电流密度较大,电弧能量集中,焊丝的熔化效率高,母材的熔透深度大,焊接速度快,同时,焊后残渣较少,提高了焊接效率,在焊接前对子母口片头预热,避免了子母口片头在焊接时出现开裂的现象,采用耐高温焊接焊丝进行焊接,提高了焊接面的强度,同时提高了抗冷裂纹的能力,同时焊接工艺简单,便于推广。(The invention discloses a dioxygen welding process for a leader seam allowance, which comprises the following steps of S1, primary and secondary leader preprocessing: a groove is manufactured on a head of a son-mother port, a V-shaped butt joint groove is formed between the head of the son port and the head of the son port, and metal luster is polished on the welding groove of the head of the son port and the surface of 20-30mm of the two sides of the groove by using abrasive paper, and the technical field of radiator processing is related. This a two oxygen welding process for leader seam allowance, through adopting the welding under the carbon dioxide gas environment, make current density great, the electric arc energy is concentrated, the melting efficiency of welding wire is high, the penetration depth of parent metal is big, welding speed is fast, and simultaneously, the postweld residue is less, welding efficiency has been improved, preheat the child seam allowance before the welding, the phenomenon of fracture appears when the welding of child seam allowance, adopt high temperature resistant welding wire to weld, the intensity of face of weld has been improved, cold crack resistance's ability has been improved simultaneously, welding process is simple simultaneously, and convenient for popularize.)

1. A dioxygen welding process for a leader seam allowance is characterized by comprising the following steps of:

s1, primary and secondary oral tablet heads pretreatment: making a groove on the head of the master and slave ports, making a V-shaped butt joint groove between the head of the master and the head of the slave, polishing the welding groove of the head of the master and the surface of 20-30mm at two sides of the groove with abrasive paper to obtain metallic luster, so that the surface of the head of the slave has no impurities such as burrs, slag, oil, rust and the like, and then washing the groove with a sodium hydroxide solution for 2-4 times;

s2, preheating before welding: heating the to-be-welded area of the primary and secondary port head by using heating equipment, monitoring the surface temperature of the primary and secondary port head by using a thermodetector during heating until the surface temperature of the primary and secondary port head reaches 150-;

s3, welding environment control: spraying carbon dioxide gas by using gas spraying equipment to enable the area where the film head sub-port and the film head mother port need to be welded to be in a carbon dioxide environment;

s4, backing welding: selecting a welding wire, enabling the welding wire to be in contact with the groove of the primary and secondary opening film heads through the secondary opening film head, melting the welding wire through a welding gun, selecting a bottoming welding starting point through a spot welding mode, controlling the distance between each welding point to be 3-6mm, completing bottoming welding after the distance between the last welding point and the initial welding point is 3-6mm, and immediately removing welding slag on the surfaces of the welding points after the bottoming welding is completed;

s5, filling and welding: after the backing welding in the S4 is finished, adopting a high-temperature-resistant welding wire, melting the welding wire by using a welding gun, so as to fill the V-shaped groove, and continuing to perform filling welding after the V-shaped groove is filled by the welding wire, so that the welding surface is 5-8mm higher than the groove;

s6, cover surface welding: after the filling welding operation in the S5 is finished, continuously using the same high-temperature-resistant welding wire in the S5, melting the welding wire by using a welding gun, and enabling the welding wire melt to completely cover the welding surface in the S5 and extend to 10-20mm of two sides of the V-shaped groove;

s7, polishing treatment: pressing the polishing wheel to the welding position to enable the abrasive to roll and micro-cut the surface of the welding pipe body to obtain a bright processed surface, wherein the surface roughness reaches Ra0.5-0.08 micrometer;

s8, welding inspection: and (4) performing appearance inspection after repair welding, performing ultrasonic flaw detection, and finishing welding of the head and the seam if no crack exists at the welding position after detection.

2. The process of claim 1 for the welding of slugs with oxygen, wherein the welding process comprises the following steps: the high-temperature-resistant welding wire in the steps S5 and S6 comprises the following raw materials in parts by weight: 20-30 parts of calcium carbonate, 15-30 parts of magnesium carbonate, 6-12 parts of titanium dioxide, 3-6 parts of o-hydroxybenzoic acid, 8-12 parts of talcum powder, 9-16 parts of mica powder and 15-19 parts of silicon dioxide.

3. The process of claim 1 for the welding of slugs with oxygen, wherein the welding process comprises the following steps: the parameter current of the backing weld in the step S4 is 100-110A, and the voltage is 30-35V.

4. The process of claim 1 for the welding of slugs with oxygen, wherein the welding process comprises the following steps: in the step S5, the cover surface welding parameter current is 150-180A, the voltage is 15-25V, and the welding speed is 100-130 mm/min.

5. The process of claim 1 for the welding of slugs with oxygen, wherein the welding process comprises the following steps: the filling welding parameter current in the step S6 is 120-130A, the voltage is 25-30V, and the welding speed is 150-180 mm/min.

6. The process of claim 1 for the welding of slugs with oxygen, wherein the welding process comprises the following steps: the concentration of the carbon dioxide in the step S3 is 99.5% -99.8%, the diameter of the welding wire in the step S4 is 1-1.4mm, and the diameter of the welding wire in the step S5 and the step S6 is 1.6-1.8 mm.

Technical Field

The invention relates to the technical field of radiator processing, in particular to a dioxygen welding process for a sheet head seam allowance.

Background

The heating radiator is a terminal device for transferring heat to the indoor, and becomes an indispensable component in life, and the heating radiator is formed by connecting a plurality of unit radiating fins, wherein each unit radiating fin comprises an upper radiating fin head, a lower radiating fin head and a radiating column pipe connected between the two radiating fin heads, the unit radiating fins are mutually welded together through the radiating fin heads, and the welding process performed on the sub-openings of the radiating fin heads is not mature at present.

The existing dioxygen welding process for the tab opening is small in current density during welding, electric arc energy is not concentrated enough, the melting efficiency of a welding wire is low, the penetration depth of a base material is shallow, the welding speed is low, meanwhile, a large amount of welding slag needs to be cleaned after welding, the welding efficiency is reduced to a great extent, the tab opening of the tab opening is not preheated before welding, the phenomenon that the tab opening of the tab opening is cracked easily occurs during welding, the strength of a welding surface is not high, the cold crack resistance is not good, the welding process is complex, and the popularization is not facilitated.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a dioxygen welding process for a tab seam allowance, which solves the problems of low welding efficiency, low welding surface strength, complex welding process and inconvenience in popularization of the conventional dioxygen welding process for the tab seam allowance.

(II) technical scheme

Based on the technical problems in the background art, the invention provides a dioxygen welding process for a film head seam allowance, which comprises the following steps:

s1, primary and secondary oral tablet heads pretreatment: making a groove on the head of the master and slave ports, making a V-shaped butt joint groove between the head of the master and the head of the slave, polishing the welding groove of the head of the master and the surface of 20-30mm at two sides of the groove with abrasive paper to obtain metallic luster, so that the surface of the head of the slave has no impurities such as burrs, slag, oil, rust and the like, and then washing the groove with a sodium hydroxide solution for 2-4 times;

s2, preheating before welding: heating the to-be-welded area of the primary and secondary port head by using heating equipment, monitoring the surface temperature of the primary and secondary port head by using a thermodetector during heating until the surface temperature of the primary and secondary port head reaches 150-;

s3, welding environment control: spraying carbon dioxide gas by using gas spraying equipment to enable the area where the film head sub-port and the film head mother port need to be welded to be in a carbon dioxide environment;

s4, backing welding: selecting a welding wire, enabling the welding wire to be in contact with the groove of the primary and secondary opening film heads through the secondary opening film head, melting the welding wire through a welding gun, selecting a bottoming welding starting point through a spot welding mode, controlling the distance between each welding point to be 3-6mm, completing bottoming welding after the distance between the last welding point and the initial welding point is 3-6mm, and immediately removing welding slag on the surfaces of the welding points after the bottoming welding is completed;

s5, filling and welding: after the backing welding in the S4 is finished, adopting a high-temperature-resistant welding wire, melting the welding wire by using a welding gun, so as to fill the V-shaped groove, and continuing to perform filling welding after the V-shaped groove is filled by the welding wire, so that the welding surface is 5-8mm higher than the groove;

s6, cover surface welding: after the filling welding operation in the S5 is finished, continuously using the same high-temperature-resistant welding wire in the S5, melting the welding wire by using a welding gun, and enabling the welding wire melt to completely cover the welding surface in the S5 and extend to 10-20mm of two sides of the V-shaped groove;

s7, polishing treatment: pressing the polishing wheel to the welding position to enable the abrasive to roll and micro-cut the surface of the welding pipe body to obtain a bright processed surface, wherein the surface roughness reaches Ra0.5-0.08 micrometer;

s8, welding inspection: and (4) performing appearance inspection after repair welding, performing ultrasonic flaw detection, and finishing welding of the head and the seam if no crack exists at the welding position after detection.

Preferably, the high-temperature-resistant welding wire in the steps S5 and S6 comprises the following raw materials in parts by weight: 20-30 parts of calcium carbonate, 15-30 parts of magnesium carbonate, 6-12 parts of titanium dioxide, 3-6 parts of o-hydroxybenzoic acid, 8-12 parts of talcum powder, 9-16 parts of mica powder and 15-19 parts of silicon dioxide.

Preferably, the parameter current of the cover surface welding in the step S4 is 100-110A, and the voltage is 30-35V.

Preferably, the parameter current of the cover surface welding in the step S5 is 150-180A, the voltage is 15-25V, and the welding speed is 100-130 mm/min.

Preferably, the parameter current for the cover surface welding in the step S6 is 120-130A, the voltage is 25-30V, and the welding speed is 150-180 mm/min.

Preferably, the concentration of carbon dioxide in the step S3 is 99.5-99.8%, the diameter of the welding wire in the step S4 is 1-1.4mm, and the diameters of the welding wire in the steps S5 and S6 are 1.6-1.8 mm.

(III) advantageous effects

The invention provides a dioxygen welding process for a sheet head seam allowance. The method has the following beneficial effects: the dioxygen welding process for the leader seam allowance comprises the following steps of S1, primary and secondary opening leader pretreatment: making a groove on the head of the sub-mother port, so that a V-shaped butt joint groove is formed between the head of the sub-mother port and the head of the mother port, and preheating before welding S2: heating the to-be-welded area of the head of the mother plate by using a heating device, and controlling the welding environment by using S3: spraying carbon dioxide gas by using a gas spraying device, S4, backing welding: selecting a welding wire to enable the welding wire to be in contact with the groove of the primary and secondary opening sheet heads, and S5 filling welding: after the backing welding processing in the S4 is finished, adopting a high-temperature-resistant welding wire, and welding the cover surface in the S6: after the filling welding operation in the S5 is finished, the same high-temperature-resistant welding wire in the S5 is continuously used, and S7 and polishing treatment are carried out: pressing the polishing wheel to the welding position, S8, welding inspection: the postrepair welding appearance inspection is carried out, ultrasonic flaw detection is carried out, welding is carried out under the carbon dioxide gas environment, the current density is large, the electric arc energy is concentrated, the melting efficiency of a welding wire is high, the penetration depth of a base metal is large, the welding speed is high, meanwhile, postweld residues are less, the welding efficiency is improved to a great extent, the primary and secondary port stub is preheated before welding, the phenomenon that the primary and secondary port stub cracks when welding is carried out is avoided, welding is carried out by adopting a high-temperature-resistant welding wire, the strength of a welding surface is improved, the cold crack resistance is improved simultaneously, the welding process is simple, and the popularization is facilitated.

Drawings

FIG. 1 is a statistical table of comparative experimental data according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the embodiment of the present invention provides three technical solutions: a dioxygen welding process for a leader seam allowance specifically comprises the following embodiments: