A fishplating method

Abstract

The present application relates to a fish scale welding method and welding machine, belong to fish scale welding technical field, the method includes a plurality of welding cycle, each cycle includes pulse stage and arc breaking stage, the arc breaking stage includes: in response to the last pulse of pulse stage end, the positive wire feeding makes the welding wire into the molten pool; after the welding wire into the molten pool, continue positive wire feeding and continue for the first time; the first time after stopping wire feeding, so that the welding wire stays and keeps contact with the molten pool; the welding wire stays for the second time; the second time after reverse wire drawing makes the welding wire leave the molten pool to carry out the next welding cycle.The present application guarantees the stability of the molten pool through the process of welding wire into the molten pool and keeping, avoids the shock to make the fish scale surface without fine texture; at the same time, the welding wire can also play the role of heat dissipation to the molten pool, to reduce the purpose of heat input. Overall, the fish scale welding is more clear and beautiful, and the welding heat is lower, which is suitable for high appearance requirement welding occasion.

Description

Technical Field

[0001] This invention relates to a method for welding fish scale patterns, belonging to the field of fish scale pattern welding technology. Background Technology

[0002] In practical applications of MIG / MAG gas shielded welding, low heat input control and aesthetically pleasing fish-scale pattern formation are constantly pursued goals. Lower welding heat input allows for welding thinner plates, reducing welding costs. Aesthetically pleasing fish-scale patterns eliminate the need for post-weld processing and enhance the appearance of the finished product. However, most existing technologies employ pulse welding, which results in poor molten pool stability during the welding process, and fine textures are prone to appearing on the fish-scale surface. Summary of the Invention

[0003] The purpose of this invention is to provide a method for welding fish scale patterns. By adding an arc interruption stage and corresponding wire feeding control, the welding wire is extended into the molten pool and held, which can calm the molten pool and accelerate heat dissipation, thereby improving the stability of the molten pool and making the fish scale pattern clearer.

[0004] To achieve the above objectives, the present invention is implemented using the following technical solution.

[0005] In a first aspect, the present invention provides a method for welding fish-scale patterns, the method comprising multiple welding cycles, each cycle comprising a pulse phase and an arc-breaking phase, the arc-breaking phase comprising:

[0006] In response to the end of the last pulse of the pulse phase, the wire is fed forward to extend the welding wire into the molten pool;

[0007] After the welding wire extends into the molten pool, it continues to be fed forward and for an extended period of time.

[0008] After the first time period, wire feeding is stopped to allow the welding wire to remain in contact with the molten pool; the welding wire remains in contact for a second time.

[0009] After the second time, the wire is pulled in the reverse direction to remove the welding wire from the molten pool in order to proceed to the next welding cycle.

[0010] Optionally, the wire feeding speed during the pulse phase is 0-25 m / min; the wire feeding speed when the welding wire is fed into the molten pool in the forward direction is 0-15 m / min; and the wire pulling speed when the welding wire is pulled away from the molten pool in the reverse direction is 5-50 m / min.

[0011] Optionally, the formula for calculating the second time is:

[0012] t2=bI0+c*f+d*K+m,

[0013] Where t2 is the second time, b, c, d, and m are coefficients, I0 is the pulse current, f is the frequency, and K is the duty cycle.

[0014] Optionally, the reverse wire retraction after the second time to remove the welding wire from the molten pool for the next welding cycle includes:

[0015] The third time of reverse wire drawing causes the welding wire to leave the molten pool;

[0016] After the welding wire leaves the molten pool, the wire is continuously pulled in the opposite direction for the fourth time.

[0017] The spinning process stops after the fourth time interval, and the stoppage of spinning continues for the fifth time interval.

[0018] After the fifth time interval, the wire feeding speed is increased to the preset pulse wire feeding speed to enter the pulse phase of the next cycle.

[0019] Optionally, the first time is 10-200ms; the third time is 0-20ms; and the fourth time is 0-20ms.

[0020] Optionally, the fifth time is calculated as follows:

[0021] t5=T B -(t1+t2+t3+t4)

[0022] T B The time for the arc breaking phase is t1, t2, t3, and t4.

[0023] Optionally, in response to the end of the last pulse of the pulse phase, the welding voltage changes from the pulse voltage to the first voltage;

[0024] When the welding wire extends into the molten pool, the welding voltage changes from a first voltage to a second voltage;

[0025] When the welding wire leaves the molten pool, the welding voltage changes from the second voltage to the third voltage;

[0026] The second voltage is less than the first voltage; the second voltage is less than the third voltage.

[0027] Optionally, in response to the end of the last pulse of the pulse phase, the welding current is changed from the pulse current to the first current;

[0028] In response to the welding wire extending into the molten pool, the welding current changes from a first current to a second current;

[0029] In response to the second duration of the wire feeding stop, the welding current changes from a second current to a third current;

[0030] The second current is less than the first current; the second current is less than the third current.

[0031] Optionally, the wire feeding speed changes linearly with each adjustment, and the slope of the linear change is 0.1-10.

[0032] In a second aspect, the present invention provides a welding machine comprising:

[0033] Memory, used to store instructions;

[0034] A processor is configured to execute the instructions, causing the welding machine to perform operations that implement the welding control method.

[0035] Compared with existing technologies, the beneficial effects achieved by this invention are as follows: the process of the welding wire extending into and holding the molten pool ensures the stability of the molten pool, avoids vibration, and eliminates fine textures on the fish-scale pattern surface; at the same time, the welding wire also plays a role in heat dissipation for the molten pool, thereby reducing heat input. Overall, it results in a clearer and more aesthetically pleasing fish-scale pattern, with lower welding heat, making it suitable for welding applications where high appearance requirements are needed for thin plates. Attached Figure Description

[0036] Figure 1 The diagram shown is a schematic representation of the welding method in Example 1. Detailed Implementation

[0037] It should be noted that:

[0038] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present invention, rather than limitations thereof. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other.

[0039] The term "and / or" simply describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / " generally indicates that the preceding and following related objects have an "or" relationship. Example

[0040] This embodiment describes a fish-scale pattern welding method, which includes multiple welding cycles, each cycle including a pulse phase and an arc-breaking phase performed sequentially.

[0041] The time T of the pulse phase within each welding cycle A and the time T of the arc-breaking phase BThe pulse parameters are determined based on pre-acquired pulse parameters, such as pulse current, frequency, and duty cycle. The reciprocal of the frequency is the period, and the duty cycle refers to the proportion of pulse welding to one welding cycle. Specific calculation methods can be determined based on existing technology or extensive experimental results; this embodiment does not impose specific limitations. The wire feed speed V0 remains constant during the pulse phase. V0 is determined based on the pulse current, and the calculation method is as follows:

[0042] V0=aI0

[0043] Where a is the first coefficient and I0 is the pulse current; in a specific embodiment, the wire feeding speed V0 during the pulse phase is 0-25 m / min;

[0044] When pulse welding reaches T A A welding control method involving wire feed speed, welding current, and welding voltage is implemented after the pulse phase, the method including:

[0045] Step S1: In response to the end of the last pulse of the pulse phase, the wire is fed forward to extend the welding wire into the molten pool.

[0046] After the welding wire enters the molten pool, a short circuit occurs, extinguishing the arc and reducing heat generation to calm the molten pool. In a specific embodiment, after the pulse phase ends, the welding voltage and welding current are adjusted to a predetermined first voltage U1 and first current I1, respectively. Furthermore, the wire feed speed is adjusted from V0 with an acceleration of k1 to a first speed V1. The forward wire feed maintains the wire feed speed at the first speed V1 as the welding wire enters the molten pool. In actual operation, the first speed V1 is 0-15 m / min. Before the forward-fed welding wire enters the molten pool, the welding current is the first current I1, and the welding voltage is the first voltage U1. The first current I1 and the first voltage U1 are primarily for maintaining arc combustion and can be relatively low, even zero in extreme cases. This embodiment does not impose specific limitations.

[0047] Step S2: After the welding wire extends into the molten pool, the wire continues to be fed forward for a first time. The continuous wire feeding during the first time is to ensure that the welding wire fully contacts the molten pool, thereby achieving a better calming effect. In a specific embodiment, the forward wire feeding speed when the welding wire extends into the molten pool is 0-15 m / min, and the first time is 10-200 ms.

[0048] Furthermore, after the welding wire is inserted into the molten pool, both the welding voltage and welding current are reduced. The welding voltage is lowered from the first voltage U1 to a preset value to the second voltage U2, and the welding current is lowered from the first current I1 to a preset value to the second current I2. The purpose of this adjustment is to avoid high heat causing the welding wire to melt and affecting the calming effect. The preset values ​​for the reduction of welding voltage and welding current are all pre-set, and the specific values ​​can be determined based on a large number of experiments. This embodiment does not impose specific limitations.

[0049] Understandably, after the welding wire enters the molten pool, if the welding current and welding voltage are relatively high, the high heat will cause a large amount of welding wire to melt. Once the part of the welding wire that has entered the molten pool has completely melted, a new electric arc will be formed to cause the welding wire to leave the molten pool. If the welding wire leaves the molten pool, it will be difficult to achieve the effect of stabilizing the molten pool.

[0050] Step S3: After the first time t1, wire feeding is stopped to allow the welding wire to remain in contact with the molten pool; the welding wire remains in contact for a second time t2. In a specific embodiment, the first speed V1 decreases to zero with an acceleration of k2 to stop wire feeding. Typically, k2 can be a linear adjustment with a constant slope, or a multi-segment adjustment with a variable slope. In a more specific embodiment, the slope of the linear adjustment is 0.1-10. This embodiment does not impose a specific limitation.

[0051] In this embodiment, the purpose of the wire dwell time is to continuously calm the molten pool while ensuring the wire is in full contact with it, thereby preventing pool oscillation and ensuring the welding quality of the fish-scale pattern. The second time t2 in this embodiment cannot be too short or too long. In actual welding, if the second time t2 is too short, the wire will not be able to effectively calm the pool and reduce heat input due to the short dwell time. Conversely, if the second time t2 is too long, the molten pool will gradually cool during the dwell time, and the wire may stick to the pool, leading to poor welding. Therefore, the second dwell time t2 needs to be calculated using a specific formula to achieve the desired effect.

[0052] In one specific embodiment, the second time t2 is calculated using the following formula.

[0053] t2=bI0+c*f+d*K+m

[0054] Where t2 is the second time interval, b, c, d, and m are the second, third, fourth, and fifth coefficients, respectively, I0 is the pulse current, f is the frequency, and K is the duty cycle. The reciprocal of the frequency is the period, and the duty cycle refers to the proportion of a welding cycle occupied by pulse welding.

[0055] Furthermore, the value of the second time t2 will vary depending on the type of workpiece being welded. For example, the second time t2 can be set to different values ​​depending on the plate thickness and material type. Different plate thicknesses have different heat dissipation effects; the thicker the plate, the better the heat dissipation, and the easier it is for the molten pool to cool. Therefore, the value of the second time t2 needs to be set smaller. Different materials have different thermal conductivity, and the cooling rate of the molten pool is also different. The faster the cooling rate, the shorter the second time t2 needs to be to avoid the molten pool from overcooling and causing the welding wire to stick to the molten pool. Therefore, the second time t2 is different for different plate thicknesses and material types. In practice, the second, third, fourth, and fifth coefficients in the aforementioned second time t2 calculation formula can be adjusted according to the actual situation to adapt to different welding conditions.

[0056] Step S4: After the second time interval, reverse wire pulling removes the welding wire from the molten pool to proceed to the next welding cycle. Reverse wire pulling rekindles the arc after the welding wire leaves the molten pool, preventing further cooling of the molten pool and facilitating the next welding cycle. In one specific embodiment, the wire pulling speed for reverse wire pulling is 5-50 m / min. After the second time interval, the wire feed speed is adjusted from zero to the acceleration k3 for reverse wire pulling. k3 can be a linear adjustment of a single slope or a multi-segment adjustment of multiple slopes. In a more specific embodiment, the slope of the linear adjustment is 0.1-10; this embodiment does not impose a specific limitation.

[0057] Furthermore, in step S4, when the welding wire leaves the molten pool, the welding voltage is increased from the second voltage U2 to a preset value to the third voltage U3. The purpose of increasing the welding voltage is to accelerate the reignition of the arc and provide heat to the molten pool as a transition before entering the next pulse stage. In addition, regarding the welding current, in response to the second time t2 of the wire feeding stop, the welding current is increased from the second current I2 to the third current I3. The welding current is increased when the wire dwell time reaches the second time t2, thereby accelerating the melting of the welding wire to re-establish the arc in order to enter the next pulse stage.

[0058] In a specific embodiment, step S4 specifically includes: step S41: reverse wire drawing for a third time t3 to make the welding wire leave the molten pool; step S42: after the welding wire leaves the molten pool, reverse wire drawing continues for a fourth time t4; step S43: after the fourth time t4, wire drawing stops, and the stop wire drawing lasts for a fifth time t5; step S44: after the fifth time, the wire feeding speed is increased to a preset pulse wire feeding speed V0 to enter the pulse phase of the next cycle.

[0059] The third and fourth times are preset, and their specific values ​​can be adjusted according to different welding conditions based on experimental adaptability. In a specific embodiment, the third time is 0-20ms; the fourth time is 0-20ms; and the fifth time is calculated as follows:

[0060] t5=T B -(t1+t2+t3+t4)

[0061] T B The preset time for the arc breaking phase is t1, t2, t3, and t4.

[0062] In addition, the accelerator for reversing the wire drawing until it stops in step S43 is k4, and the acceleration for increasing the wire feeding speed to the preset pulse wire feeding speed V0 is k5. Both k4 and k5 are preset, and the specific values ​​can be set according to the actual welding conditions. This embodiment does not impose specific limitations.

[0063] This embodiment follows the above process for welding. The process of inserting and holding the welding wire into the molten pool ensures the stability of the molten pool, avoids vibration, and eliminates fine textures on the fish-scale pattern surface. At the same time, the welding wire also helps dissipate heat from the molten pool, thereby reducing heat input. Overall, this results in a clearer and more aesthetically pleasing fish-scale pattern, with lower welding heat, making it suitable for welding applications requiring high-quality appearance on thin plates. Example

[0064] Based on the same inventive concept as Embodiment 1, in one embodiment of this application, a welding machine is also disclosed, comprising: a memory for storing instructions; and a processor for executing the instructions, causing the welding machine to perform the operation of the welding control method of any of the above embodiments. The components of the welding machine may include, but are not limited to: at least one processor, at least one memory, and a bus connecting different system components (including the memory and the processor). The processor may be connected to the welding section of the welding machine, which generates heat in response to the welding current output by the processor to achieve welding of the workpiece.

[0065] The memory stores program code that can be executed by a processor, causing the processor to perform the steps described in the "Exemplary Methods" section above, based on various exemplary embodiments of the present invention. For example, the processor can perform actions such as... Figure 1The steps are shown. The memory may include readable media in the form of volatile memory, such as random access memory (RAM) and / or cache memory, and may further include read-only memory (ROM). The memory may also include programs / utilities having a set (at least one) of program modules, including but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment. The bus may represent one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, a graphics acceleration port, a processing unit, or a local bus using any of a variety of bus structures.

[0066] The welding machine can also communicate with one or more external devices (such as keyboards, pointing devices, Bluetooth devices, etc.), one or more devices that enable user interaction with the welding machine, and / or any device that enables the welding machine to communicate with one or more other computing devices (such as routers, modems, etc.). This communication can be achieved through input / output (I / O) interfaces. Furthermore, the welding machine can communicate with one or more networks (such as local area networks (LANs), wide area networks (WANs), and / or public networks, such as the Internet) via a network adapter. The network adapter communicates with other modules of the welding machine via a bus.

[0067] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0068] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0069] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0070] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0071] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

[0072] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A fishplating method, characterized by, The method comprises a plurality of welding cycles, each cycle comprising a pulse phase and an arc breaking phase, the arc breaking phase comprising: in response to the end of the last pulse of the pulse phase, forward wire feeding to extend the welding wire into the molten pool; after the welding wire extends into the molten pool, continuing the forward wire feeding for a first time; stopping the wire feeding after the first time to allow the welding wire to stay and keep contact with the molten pool; the welding wire stays for a second time; reverse wire withdrawing to move the welding wire away from the molten pool for the next welding cycle after the second time; in response to the end of the last pulse of the pulse phase, the welding voltage is changed from the pulse voltage to a first voltage; when the welding wire extends into the molten pool, the welding voltage is changed from the first voltage to a second voltage; when the welding wire moves away from the molten pool, the welding voltage is changed from the second voltage to a third voltage; the second voltage is less than the first voltage; the second voltage is less than the third voltage; in response to the end of the last pulse of the pulse phase, the welding current is changed from the pulse current to a first current; in response to the welding wire extending into the molten pool, the welding current is changed from the first current to a second current; in response to the stopping of the wire feeding for the second time, the welding current is changed from the second current to a third current; the second current is less than the first current; the second current is less than the third current; the second time is calculated by the following formula: t2 = bI0 + c*f + d*K + m, wherein t2 is the second time, b, c, d, m are coefficients, I0 is the pulse current; f is the frequency, K is the duty cycle; the reverse wire withdrawing to move the welding wire away from the molten pool for the next welding cycle after the second time comprises: reverse wire withdrawing for a third time to move the welding wire away from the molten pool; continuing the reverse wire withdrawing for a fourth time after the welding wire moves away from the molten pool; stopping the wire withdrawing after the fourth time, the stopping of the wire withdrawing lasts for a fifth time; after the fifth time, the wire feeding speed is increased to a preset pulse wire feeding speed to enter the pulse phase of the next cycle; the calculation method of the fifth time is: t5 = T B - (t1 + t2 + t3 + t4) T B t1 is the first time, t2 is the second time, t3 is the third time, and t4 is the fourth time for the arc interruption phase. each time the wire feeding speed is adjusted, the wire feeding speed changes linearly, and the slope of the linear change is 0.1-10.

2. The fishplating method of claim 1 wherein, the wire feeding speed of the pulse phase is 0-25 m / min; the wire feeding speed when the welding wire extends into the molten pool is 0-15 m / min, and the wire withdrawing speed when the welding wire moves away from the molten pool is 5-50 m / min.

3. The fishplating method of claim 1 wherein, the first time is 10-200 ms; the third time is 0-20 ms; the fourth time is 0-20 ms.

4. A welding machine characterized by, comprise: a memory for storing instructions; a processor for executing the instructions to allow the welding machine to perform the operations for implementing the welding control method according to any one of claims 1-3.

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