CN110744176A - Cold arc welding wire feeder - Google Patents
Cold arc welding wire feeder Download PDFInfo
- Publication number
- CN110744176A CN110744176A CN201810812228.9A CN201810812228A CN110744176A CN 110744176 A CN110744176 A CN 110744176A CN 201810812228 A CN201810812228 A CN 201810812228A CN 110744176 A CN110744176 A CN 110744176A
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- wire feeder
- welding
- wire
- arc welding
- wire feeding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/12—Automatic feeding or moving of electrodes or work for spot or seam welding or cutting
- B23K9/133—Means for feeding electrodes, e.g. drums, rolls, motors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
- B23K9/321—Protecting means
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding Control (AREA)
Abstract
The invention relates to the technical field of welding machine equipment, in particular to a cold arc welding wire feeder, which comprises a DSP (digital signal processor) main control board, a wire feeder assembly, a welding gun mechanism assembly, a human-computer interface control unit, a manual wire feeding and gas detection unit, a shielding gas control unit and a port connected with a host, wherein the DSP main control board is respectively connected with other modules and regulates and controls the modules. The invention has the innovation that the wire feeding mechanism and the welding gun motor can synchronously act to finish the mutual alternate action of special wire drawing and wire feeding, thereby realizing the special welding requirements of cold arc welding and the like; the wire feeder is provided with a protective gas control unit for protecting the wire feeder; the wire feeder also comprises a diagnosis mode and a normal mode, so that the normal operation of the wire feeder and the timely diagnosis during the fault are ensured.
Description
Technical Field
The invention relates to the technical field of welding machine equipment, in particular to a cold arc welding wire feeder capable of accurately controlling the wire feeding speed.
Background
The conventional wire feeding equipment is unstable in wire feeding speed, so that the arc length is unstable during welding, a wire jacking phenomenon or an arc breaking phenomenon can occur, and the welding requirement is difficult to meet. Meanwhile, the setting interface of welding parameters is complex, long-time debugging is needed to achieve ideal wire feeding parameters, and high technical requirements are imposed on welding personnel.
The chinese invention with application publication number CN 108127295 a discloses a wire feeding control method and device, which specifically are: acquiring basic data table information of a welding power supply; obtaining wire feeding control parameters according to preset welding specifications and the basic data table information; realizing time sequence synchronization with the welding power supply through an Ethernet communication unit; and controlling the wire feeding according to the synchronized time sequence and the wire feeding control parameters. The time sequence synchronous wire feeding control is simple, the feedback synchronization is not timely enough, and creative improvement can be further made.
Disclosure of Invention
The invention aims to provide a mechanism for accurately controlling the speed of welding wires, aiming at the problems in the prior art, and the technical problem to be solved is to realize accurate wire feeding during welding and avoid the phenomena of wire jacking, arc breaking or splashing as much as possible.
A cold arc welding wire feeder is characterized by comprising a DSP (digital signal processor) main control board, a wire feeder assembly, a welding gun mechanism assembly, a human-computer interface control unit, a manual wire feeding and gas detection unit, a protective gas control unit and a host connection port, wherein the DSP main control board is respectively connected with other modules and regulates and controls the modules;
preferably, the DSP main control board includes an FPGA control system center, a DSP control system center, a communication part, an IO part, a display panel data exchange part, an encoder part, a driving part, an AD sampling part, and a power supply part;
furthermore, the FPGA control system center takes the latest EP3C10E144 as a core and is responsible for controlling an IO part, a display panel data exchange part, an encoder part and a driving part;
the DSP control system center consists of the latest DSP TMS320F28335 and is responsible for controlling communication and AD sampling and exchanging data with the FPGA; the functions are calculation and control of speed and unified process parameter control.
The communication part is in charge of communicating with the welding host machine and exchanging data, so that the feeding and the drawing of the welding wire and the control of the arc burning stage and the short circuit stage of the welding arc are kept synchronous;
the IO part is responsible for controlling the manual wire feeding and gas detection unit;
the data exchange part of the display panel is used for unifying process parameter adjustment and displaying welding current, voltage and wire feeding speed in real time;
the encoder part calculates the feedback speeds of the wire feeding mechanism and the welding gun mechanism, controls the speeds in real time and ensures the stable wire feeding of the wire feeding machine;
the driving part is used for driving the wire feeding mechanism and the welding gun servo motor;
the AD sampling part is used for collecting current and arc voltage samples when the wire feeding mechanism and the welding gun mechanism work;
the manual wire feeding and gas detection unit is used for manually testing wire feeding and gas detection;
the protective gas control unit outputs and turns off protective gas by controlling the electromagnetic valve;
the human-computer interface control unit is mainly used for adjusting centralized process parameters and setting current, voltage and wire feeding speed during welding;
the welding gun mechanism assembly comprises a servo motor, a speed reducer unit, a gas protection unit, a welding gun body unit and a welding gun water cooling unit; a welding gun servo motor is driven to work by driving a human-computer interface control unit;
furthermore, the servo motor adopts a synchronous servo motor, can realize positive and negative rotation, realizes the wire pushing and pulling function, and simultaneously accurately feeds back the speed of a welding gun motor to keep the molten drop transition and the welding wire movement synchronous.
The wire feeding mechanism assembly drives the wire feeding mechanism contained in the wire feeding mechanism assembly to feed back the speed in real time, so that the speed of the wire feeding mechanism is controlled, and the uniform wire feeding is realized;
the power supply part is specially used for supplying power for the DSP main control panel and the display panel;
the port connected with the host machine mainly provides a power supply required by the wire feeder.
The cold arc welding process control working principle is as follows:
the servo motor is in a wire feeding stage in an arc stage of welding electric arc, the servo motor rotates reversely in a short-circuit stage of molten drops to quickly draw back the welding wires, the liquid level of the molten drops is broken by mechanical force, the servo motor on the welding gun rotates forwards and backwards to realize a wire pushing and pulling function, meanwhile, the speed of the motor of the welding gun is accurately fed back to keep the molten drop transition and the welding wire movement synchronous, and the welding process is uniform and regular.
The working mode of the wire feeder has a diagnosis mode and a normal mode, and in the diagnosis mode, a user can carry out manual operation to carry out fault diagnosis and exception handling of the wire feeder, and independent operation of external switching value signals and the like; in the normal mode, a command from an arc welding host is received to carry out welding wire feeding operation, the welding wire feeding operation has two working states and a standby state, and when welding is not started or the welding is finished, the welding wire feeding operation enters the standby state to wait for the next command. The commands sent by the arc welding host machine mainly comprise wire feeding speed setting and gas protection control.
The current and the rotating speed sampled by the motor are converted into real-time wire feeding speed through algorithm processing of a DSP (digital signal processor) main control center of the wire feeder, and meanwhile, the speed data is informed to the running condition of the current wire feeder through a display screen sending and receiving thread, so that the wire feeding speed can be conveniently adjusted in real time according to the welding condition.
The unified welding process parameter adjusting and controlling unit is integrated by DSP main control board software, the integrated parameters comprise welding wires selected by an operator and optimal welding current and voltage parameters during gas welding, the process that the optimal working state needs to be found through repeated testing before welding is omitted, and ideal welding requirements can be met by using the unified welding parameters.
The invention has the innovation that the wire feeding mechanism and the welding gun motor can synchronously act to finish the mutual alternate action of special wire drawing and wire feeding, thereby realizing the special welding requirements of cold arc welding and the like; the wire feeder is provided with a protective gas control unit for protecting the wire feeder; the wire feeder also comprises a diagnosis mode and a normal mode, so that the normal operation of the wire feeder and the timely diagnosis during the fault are ensured.
Drawings
FIG. 1 is a control schematic block diagram of a preferred embodiment of the present invention.
FIG. 2 is a software control flow chart of a preferred embodiment of the present invention.
FIG. 3 is a flow chart of the data exchange between the DSP main control board and the display board according to a preferred embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments so that those skilled in the art can more clearly and completely understand the technical solutions of the present invention.
The wire feeder for cold arc welding comprises a DSP main control board, a wire feeder assembly, a welding gun mechanism assembly, a human-computer interface control unit, a manual wire feeding and gas detection unit, a protective gas control unit and a host connection port, wherein the DSP main control board is connected with other modules respectively and used for regulating and controlling the modules, and the human-computer interface control unit is connected with the host and the gas detection unit.
The DSP main control board comprises an FPGA control system center, a DSP control system center, a communication part, an IO part, a display board data exchange part, an encoder part, a driving part, an AD sampling part and a power supply part;
the FPGA control system center takes the latest EP3C10E144 as a core and is responsible for controlling an IO part, a display panel data exchange part, an encoder part and a driving part;
the DSP control system center consists of the latest DSP TMS320F28335 and is responsible for controlling communication and AD sampling and exchanging data with the FPGA; the functions are calculation and control of speed and unified process parameter control.
The communication part is in charge of communicating with the welding host machine and exchanging data, so that the feeding and the drawing of the welding wire and the control of the arc burning stage and the short circuit stage of the welding arc are kept synchronous;
the IO part is responsible for controlling the manual wire feeding and gas detection unit;
the data exchange part of the display panel is used for unifying process parameter adjustment and displaying welding current, voltage and wire feeding speed in real time;
the encoder part calculates the feedback speeds of the wire feeding mechanism and the welding gun mechanism, controls the speeds in real time and ensures the stable wire feeding of the wire feeding machine;
a servo welding gun driving part for driving the wire feeding mechanism and the welding gun servo motor;
the AD sampling part is used for collecting current and arc voltage samples when the wire feeding mechanism and the welding gun mechanism work;
the manual wire feeding and gas detection unit is used for manually testing wire feeding and gas detection;
the protective gas control unit outputs and turns off protective gas by controlling the electromagnetic valve;
the human-computer interface control unit is mainly used for adjusting centralized process parameters and setting the current, the voltage and the wire feeding speed during welding;
the welding gun mechanism assembly comprises a servo motor, a speed reducer unit, a gas protection unit, a welding gun body unit and a welding gun water cooling unit; the welding gun servo motor is driven to work by the driving control unit;
the servo motor adopts a synchronous servo motor, can realize positive and negative rotation, realizes the wire pushing and pulling function, and simultaneously carries out accurate feedback on the speed of a welding gun motor to ensure that molten drop transition and welding wire movement are kept synchronous.
The wire feeding mechanism assembly drives the wire feeding mechanism contained in the wire feeding mechanism assembly to feed back the speed in real time, so that the speed of the wire feeding mechanism is controlled, and the uniform wire feeding is realized;
the power supply part is specially used for supplying power for the DSP main control panel and the display panel;
and the port is connected with the host machine and mainly provides a power supply required by the wire feeder.
The cold arc welding process control working principle is as follows: the servo motor is in a wire feeding stage in an arc stage of welding electric arc, the servo motor rotates reversely in a short-circuit stage of molten drops to quickly draw back the welding wires, the liquid level of the molten drops is broken by mechanical force, the servo motor on the welding gun rotates forwards and backwards to realize a wire pushing and pulling function, meanwhile, the speed of the motor of the welding gun is accurately fed back to keep the molten drop transition and the welding wire movement synchronous, and the welding process is uniform and regular.
The software control flow chart is shown in fig. 2, the working mode of the wire feeder has two types, namely a diagnosis mode and a normal mode, in the diagnosis mode, the fault diagnosis and the abnormal processing of the wire feeder can be carried out by manual operation of a user, the external switching value signal is independently operated, and the like, in the normal mode, the wire feeder is operated by receiving a command from an arc welding host machine, and when the welding is not started or the welding is finished, the wire feeder enters a standby state to wait for the next command. The commands sent by the arc welding host machine mainly comprise wire feeding speed setting and gas protection control.
As shown in fig. 3, which is a data exchange flow chart of the DSP motherboard and the display panel, the current and the rotation speed sampled by the motor are converted into a real-time wire feeding speed through the algorithm processing of the DSP main control center of the wire feeder, and meanwhile, the speed data is informed to the user of the current running condition of the wire feeder through the display screen sending and receiving threads, so as to facilitate the real-time adjustment of the wire feeding speed according to the welding condition.
The unified welding process parameter adjusting and controlling unit is integrated by DSP main control board software, the integrated parameters comprise welding wires selected by an operator and optimal welding current and voltage parameters during gas welding, the process of repeatedly testing and finding the optimal working state before welding is omitted, and ideal welding requirements can be met by using the unified welding parameters
The above embodiments are only for the purpose of facilitating understanding of the technical solutions of the present invention, and should not be construed as limiting the present invention. Simple substitutions and modifications according to the technical solution of the present invention still fall within the protection scope covered by the claims and the specification of the present invention.
Claims (8)
1. The cold arc welding wire feeder is characterized by comprising a DSP (digital signal processor) main control board, a wire feeder assembly, a welding gun mechanism assembly, a human-computer interface control unit, a manual wire feeding and gas detection unit, a protective gas control unit and a host connection port, wherein the DSP main control board is respectively connected with other modules and regulates and controls the modules.
2. The cold arc welding wire feeder of claim 1, wherein the DSP main control board comprises an FPGA control system center, a DSP control system center, a power supply portion, a communication portion, an IO portion, a display panel data exchange portion, an encoder portion, a driving portion, and an AD sampling portion.
3. The cold arc welding wire feeder of claim 1, wherein the welding gun mechanism assembly comprises a servo motor, a reducer unit, a gas protection unit, a welding gun body unit and a welding gun water cooling unit, and the welding gun servo motor is driven to work by the human-computer interface control unit.
4. The cold arc welding wire feeder of claim 3, wherein the servo motor is a synchronous servo motor, and can rotate forward and backward to achieve a wire pushing and pulling function, and the speed of the welding gun motor is accurately fed back to keep the molten drop transition and the welding wire movement synchronous.
5. The cold arc welding wire feeder of claim 1, wherein the wire feeder assembly drives a wire feeder contained therein to feed back the speed in real time, thereby controlling the speed of the wire feeder and realizing a uniform wire feeding.
6. The cold arc welding wire feeder of claim 1, wherein the FPGA control system center is connected to and controls the IO portion, the display panel data exchange portion, the encoder portion, and the driving portion, respectively.
7. The cold arc welding wire feeder of claim 1, wherein the DSP control system center is responsible for controlling the communication part and the AD sampling part, and exchanges data with the FPGA control system center to calculate and control speed and control unified process parameters, so as to achieve synchronous implementation of real-time sampling feedback.
8. The cold arc welding wire feeder of claim 1, further comprising two modes of operation, a diagnostic mode and a normal mode, wherein a user can manually operate the wire feeder to perform fault diagnosis, exception handling, and independent operation of an external on-off signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810812228.9A CN110744176A (en) | 2018-07-23 | 2018-07-23 | Cold arc welding wire feeder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810812228.9A CN110744176A (en) | 2018-07-23 | 2018-07-23 | Cold arc welding wire feeder |
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| CN110744176A true CN110744176A (en) | 2020-02-04 |
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| CN201810812228.9A Pending CN110744176A (en) | 2018-07-23 | 2018-07-23 | Cold arc welding wire feeder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109304531A (en) * | 2018-11-20 | 2019-02-05 | 唐山松下产业机器有限公司 | Weld time sequence synchronous control method |
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| CN109304531A (en) * | 2018-11-20 | 2019-02-05 | 唐山松下产业机器有限公司 | Weld time sequence synchronous control method |
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Application publication date: 20200204 |
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