CN115722765B - Arc welding control method and system - Google Patents
Arc welding control method and system Download PDFInfo
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- CN115722765B CN115722765B CN202211461815.0A CN202211461815A CN115722765B CN 115722765 B CN115722765 B CN 115722765B CN 202211461815 A CN202211461815 A CN 202211461815A CN 115722765 B CN115722765 B CN 115722765B
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Abstract
The invention discloses an arc welding control method and system, which relate to the technical field of arc welding, and have the technical scheme that: controlling the welding wire to forward feed to the welding object in one direction according to the feeding speed; when the welding wire is fed forward to the welding object in one direction, controlling the welding wire to rotate in one direction according to the rotation angular velocity; wherein, the welding wire and the welding object generate electric arc to realize welding. When the welding wire is controlled to forward feed to a welding object in one direction according to the feeding speed, the welding wire is controlled to rotate in one direction according to the rotation angular speed, so that the formation of a new stress interface is reduced under the action of thrust force of metal atoms on the periphery of the rotation plane; the air discharge of the welding part is enhanced, and the generation of welding air holes is reduced; meanwhile, under the condition of meeting the requirement of a certain welding thickness, the sputtering range is reduced.
Description
Technical Field
The invention relates to the technical field of arc welding, in particular to an arc welding control method and an arc welding control system.
Background
Arc welding is a welding method in which a metal to be welded is used as one electrode, a welding rod is used as the other electrode, and when the two electrodes are close to each other, an arc is generated to melt the metal and the welding rod. With the continuous development of automation and intelligence technology and the high importance of welding quality, automatic welding has been developed into an advanced manufacturing technology, and the application range of automatic welding is expanding rapidly because the automatic welding plays an increasing role in the application of various industries.
The existing arc welding technology mainly controls welding wires to move towards a metal object at a certain feeding speed through arc welding equipment so as to enable the metal object to realize steady-state welding, but sputtering is very easy to occur in the process, and the welding surface is uneven. For this reason, an arc welding control method for controlling movement of a welding wire toward a metal object in a decelerating state or a reciprocating motion is disclosed in the prior art, thereby reducing impact on a welding portion and realizing low sputtering. However, due to the change of the moving speed and the moving direction, metal atoms at the welding part are very easy to form different stress sections under different impact actions, so that the soldering tin is easy to crack under the action of external force; in addition, the complex and changeable metal atom movement also easily forms changeable sputtering surge, so that tiny air holes are formed in the soldering tin; in addition, under the impact action of a single direction, the welding part is sputtered in a conical shape or a counter bore shape, and is also a main reason for causing the welding part to be concave, and a certain concave exists even if the feeding speed is reduced.
Therefore, how to study and design an arc welding control method and system capable of overcoming the above-mentioned defects is an urgent problem to be solved.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide an arc welding control method and an arc welding control system, which are used for controlling the unidirectional rotation of a welding wire according to a rotation angular velocity when the unidirectional forward feeding of the welding wire to a welding object is controlled according to a feeding speed, so that new stress interface formation is reduced under the action of thrust force of metal atoms on the periphery of a rotation plane; the air discharge of the welding part is enhanced, and the generation of welding air holes is reduced; meanwhile, under the condition of meeting the requirement of a certain welding thickness, the sputtering range is reduced.
The technical aim of the invention is realized by the following technical scheme:
in a first aspect, there is provided an arc welding control method comprising the steps of:
controlling the welding wire to forward feed to the welding object in one direction according to the feeding speed;
when the welding wire is fed forward to the welding object in one direction, controlling the welding wire to rotate in one direction according to the rotation angular velocity;
wherein, the welding wire and the welding object generate electric arc to realize welding.
Further, the feeding speed is kept unchanged in the unidirectional forward feeding process of the welding wire to the welding object;
or, the feed speed is changed in a decreasing manner during the unidirectional forward feeding of the welding wire to the weld.
Further, the rotation angular velocity is kept unchanged in the unidirectional rotation process of the welding wire;
the rotation angular velocity is in decreasing change in the unidirectional rotation process of the welding wire;
or the rotation angular velocity presents increasing variation in the unidirectional rotation process of the welding wire.
Further, the feed speed is maintained constant during unidirectional forward feed of the wire to the weld, and the rotational angular velocity is increasingly varied during unidirectional rotation of the wire.
Further, the feed speed is maintained constant during unidirectional forward feeding of the welding wire to the weld, and the rotational angular velocity is maintained constant during unidirectional rotation of the welding wire.
Further, the feed speed is changed in a decreasing manner during unidirectional forward feeding of the welding wire to the weld, and the rotational angular velocity is changed in a decreasing manner during unidirectional rotation of the welding wire.
Furthermore, the feed speed and the rotation angular speed are synchronously regulated and controlled according to a pre-constructed balance correlation function.
Further, the expression of the balance correlation function is specifically:
wherein w is t A rotation angular velocity indicating unidirectional rotation of the welding wire at time t; v t Indicating the feeding speed of the welding wire in one-way forward feeding at the time t; h represents the solder thickness; s represents the flowing distance of soldering tin at the rotation angular velocity in the arc welding process; r represents the welding wire radius; r represents the upper limit value of the radius of solder sputtering.
Further, the flow distance obtaining process specifically includes:
establishing a fluid field according to welding wire material parameters, welding object material parameters and a welding range;
and determining the flow distance by a hydrodynamic analysis method after the feed rate is added to the fluid field.
In a second aspect, there is provided an arc welding control system comprising an arc welding robot and a power supply, the arc welding robot configured with:
a feeding control part for controlling the unidirectional forward feeding of the welding wire to the welding object according to the feeding speed;
a rotation control unit for controlling unidirectional rotation of the welding wire according to the rotation angular velocity when the welding wire is unidirectional fed forward to the welding object;
wherein, the welding wire and the welding object generate electric arc to realize welding.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the arc welding control method provided by the invention, when the welding wire is controlled to be positively fed to a welding object in one direction according to the feeding speed, the welding wire is also controlled to unidirectionally rotate according to the rotation angle speed, so that the formation of a new stress interface is reduced under the action of thrust force of metal atoms on the periphery of a rotation plane; the air discharge of the welding part is enhanced, and the generation of welding air holes is reduced; meanwhile, under the condition of meeting the requirement of a certain welding thickness, the sputtering range is reduced;
2. according to the invention, the unidirectional feeding and unidirectional rotation of the welding wire are controlled according to the balance correlation function, so that the resultant force of the impact force generated by unidirectional feeding and the thrust force generated by unidirectional rotation is mutually perpendicular to the sputtering critical surface, and the sputtering range can be minimized when the feeding speed is higher to meet the requirement of larger welding thickness.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention. In the drawings:
FIG. 1 is a flow chart in an embodiment of the invention;
fig. 2 is a system block diagram in an embodiment of the invention.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present invention and the descriptions thereof are for illustrating the present invention only and are not to be construed as limiting the present invention.
Example 1: an arc welding control method, as shown in fig. 1, includes the steps of:
step S1: controlling the welding wire to forward feed to the welding object in one direction according to the feeding speed;
step S2: when the welding wire is fed forward to the welding object in one direction, controlling the welding wire to rotate in one direction according to the rotation angular velocity; wherein, the welding wire and the welding object generate electric arc to realize welding.
The feeding speed can be kept unchanged in the process of unidirectional forward feeding of the welding wire to the welding object, and the feeding speed can also be changed in a decreasing manner in the process of unidirectional forward feeding of the welding wire to the welding object.
The rotation angular velocity can be kept unchanged in the unidirectional rotation process of the welding wire, the rotation angular velocity can also be changed in a descending manner in the unidirectional rotation process of the welding wire, and the rotation angular velocity can also be changed in an increasing manner in the unidirectional rotation process of the welding wire.
The unidirectional forward and unidirectional rotation can be controlled independently or simultaneously.
For example, as an alternative embodiment, the feed speed is kept constant during the unidirectional forward feeding of the welding wire to the weld, and the rotational angular velocity is increasingly changed during the unidirectional rotation of the welding wire, so that the welding requirement of a larger thickness can be satisfied without expanding the sputtering range. The larger circumferential thrust generated at the feeding terminal position can enlarge the space at the bottom of the sputtering form, so that the movement of the soldering tin along the sputtering critical surface is blocked, and the expansion effect on the sputtering range at the feeding initial position can be counteracted.
As another alternative, the feed rate is maintained during unidirectional forward feed of the wire to the weld, and the rotational angular velocity is maintained during unidirectional rotation of the wire.
As a further alternative embodiment, the feed speed is progressively varied during unidirectional forward feed of the wire to the weld, and the rotational angular velocity is progressively varied during unidirectional rotation of the wire.
If the feeding speed and the rotation angular speed are in the same variation trend, the feeding speed and the rotation angular speed can be synchronously regulated and controlled according to a pre-constructed balance correlation function.
In this embodiment, the expression of the balance correlation function is specifically:
wherein the method comprises the steps of，w t A rotation angular velocity indicating unidirectional rotation of the welding wire at time t; v t Indicating the feeding speed of the welding wire in one-way forward feeding at the time t; h represents the solder thickness; s represents the flowing distance of soldering tin at the rotation angular velocity in the arc welding process; r represents the welding wire radius; r represents the upper limit value of the radius of solder sputtering.
According to the invention, the unidirectional feeding and unidirectional rotation of the welding wire are controlled according to the balance correlation function, under the condition that the characteristics of the soldering tin thickness, the welding wire radius and the welding wire and the welding material are considered, the resultant force of the impact force generated by unidirectional feeding and the thrust force generated by unidirectional rotation is mutually perpendicular to the sputtering critical surface, and the sputtering range is minimized when the feeding speed is higher than the feeding speed given under the condition of meeting the larger welding thickness.
It should be noted that the equilibrium correlation function may be constructed by adjusting the resultant force direction, and is not limited to being vertical in this embodiment.
The flow distance is obtained by the following steps: establishing a fluid field according to welding wire material parameters, welding object material parameters and a welding range; and determining the flow distance by a hydrodynamic analysis method after the feed rate is added to the fluid field.
Example 2: an arc welding control system, as shown in fig. 2, includes an arc welding robot and a power supply, the arc welding robot is provided with a feed control part and a rotation control part, and other components necessary for a welding device, such as components for realizing current, voltage control, analysis and/or processing, can be provided without limitation.
Wherein, the feeding control part is used for controlling the welding wire to be positively fed to the welding object in one direction according to the feeding speed; a rotation control unit for controlling unidirectional rotation of the welding wire according to the rotation angular velocity when the welding wire is unidirectional fed forward to the welding object; an arc is generated between the welding wire and the welding object to realize welding.
The mounting position between the feeding control unit and the rotation control unit is not limited, and the feeding control unit may be mounted on the rotation control unit or the rotation control unit may be mounted on the feeding control unit.
Working principle: when the welding wire is controlled to forward feed to a welding object in one direction according to the feeding speed, the welding wire is controlled to rotate in one direction according to the rotation angular speed, so that the formation of a new stress interface is reduced under the action of thrust force of metal atoms on the periphery of the rotation plane; the air discharge of the welding part is enhanced, and the generation of welding air holes is reduced; meanwhile, under the condition of meeting the requirement of a certain welding thickness, the sputtering range is reduced.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (3)
1. An arc welding control method, characterized by comprising the steps of:
controlling the welding wire to forward feed to the welding object in one direction according to the feeding speed;
when the welding wire is fed forward to the welding object in one direction, controlling the welding wire to rotate in one direction according to the rotation angular velocity;
wherein, electric arc is generated between the welding wire and the welding object to realize welding;
the feeding speed is kept unchanged in the unidirectional forward feeding process of the welding wire to the welding object, and the rotation angle speed is kept unchanged in the unidirectional rotation process of the welding wire; or the feeding speed is changed in a descending way in the unidirectional forward feeding process of the welding wire to the welding object, and the rotation angle speed is changed in a descending way in the unidirectional rotation process of the welding wire;
controlling unidirectional feeding and unidirectional rotation of the welding wire according to the balance correlation function, so that resultant force of impact force generated by unidirectional feeding and thrust force generated by unidirectional rotation is mutually perpendicular to a sputtering critical surface;
the expression of the balance correlation function is specifically:
wherein w is t A rotation angular velocity indicating unidirectional rotation of the welding wire at time t; v t Indicating the feeding speed of the welding wire in one-way forward feeding at the time t; h represents the solder thickness; s represents the flowing distance of soldering tin at the rotation angular velocity in the arc welding process; r represents the welding wire radius; r represents the upper limit value of the radius of solder sputtering.
2. The arc welding control method according to claim 1, wherein the flow distance obtaining process specifically comprises:
establishing a fluid field according to welding wire material parameters, welding object material parameters and a welding range;
and determining the flow distance by a hydrodynamic analysis method after the feed rate is added to the fluid field.
3. An arc welding control system comprising an arc welding robot and a power supply, characterized in that the arc welding robot is configured with:
a feeding control part for controlling the unidirectional forward feeding of the welding wire to the welding object according to the feeding speed;
a rotation control unit for controlling unidirectional rotation of the welding wire according to the rotation angular velocity when the welding wire is unidirectional fed forward to the welding object;
wherein, electric arc is generated between the welding wire and the welding object to realize welding;
the feeding speed is kept unchanged in the unidirectional forward feeding process of the welding wire to the welding object, and the rotation angle speed is kept unchanged in the unidirectional rotation process of the welding wire; or the feeding speed is changed in a descending way in the unidirectional forward feeding process of the welding wire to the welding object, and the rotation angle speed is changed in a descending way in the unidirectional rotation process of the welding wire;
controlling unidirectional feeding and unidirectional rotation of the welding wire according to the balance correlation function, so that resultant force of impact force generated by unidirectional feeding and thrust force generated by unidirectional rotation is mutually perpendicular to a sputtering critical surface;
the expression of the balance correlation function is specifically:
wherein w is t A rotation angular velocity indicating unidirectional rotation of the welding wire at time t; v t Indicating the feeding speed of the welding wire in one-way forward feeding at the time t; h represents the solder thickness; s represents the flowing distance of soldering tin at the rotation angular velocity in the arc welding process; r represents the welding wire radius; r represents the upper limit value of the radius of solder sputtering.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211461815.0A CN115722765B (en) | 2022-11-17 | 2022-11-17 | Arc welding control method and system |
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| CN202211461815.0A CN115722765B (en) | 2022-11-17 | 2022-11-17 | Arc welding control method and system |
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| CN115722765A CN115722765A (en) | 2023-03-03 |
| CN115722765B true CN115722765B (en) | 2023-07-25 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2751744B2 (en) * | 1992-07-07 | 1998-05-18 | 日本鋼管株式会社 | Welding current control method for multi-electrode high-speed rotating arc |
| JP2905800B2 (en) * | 1996-09-09 | 1999-06-14 | 川崎重工業株式会社 | Consumable electrode type arc welding method and arc welding apparatus |
| JP3466166B2 (en) * | 2001-04-17 | 2003-11-10 | 川崎重工業株式会社 | Rotary arc welding equipment and welding speed setting equipment |
| CN102896400B (en) * | 2012-10-31 | 2015-07-15 | 哈尔滨工业大学（威海） | Solder wire rotating type consumable electrode welding method and device |
| US10543551B2 (en) * | 2013-09-16 | 2020-01-28 | Illinois Tool Works Inc. | Synchronized rotating arc welding method and system |
| CN206839378U (en) * | 2017-05-10 | 2018-01-05 | 北京新能源汽车股份有限公司 | Wire feeding mechanism |
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