CN102133673B - TIG (Tungsten Inert Gas) automatic surfacing method for projectile copper alloy conduction band - Google Patents
TIG (Tungsten Inert Gas) automatic surfacing method for projectile copper alloy conduction band Download PDFInfo
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Abstract
The invention aims to provide a TIG (Tungsten Inert Gas) automatic surfacing method for a projectile copper alloy conduction band by using a hot-cold wire double wire feeding system and a PLC (Programmable Logic Controller) control system. A welding process comprises the following steps of: presetting welding current, projectile body rotating speed and a rotating mode consisting of a uniform speed mode and a stepping mode by using the PLC, and introducing cooling water before ignition of welding electric arc to cool a welding gun and a projectile body, wherein the uniform-speed rotating mode is adopted during the surfacing of a narrow projectile band, and the stepping rotating mode is adopted during the surfacing of a wide projectile band; moving the welding gun to an appropriate position, igniting hot wire electric arc, welding main welding electric arc, and feeding a hot wire and a cold wire at the same time; and after surfacing and arc starting, surfacing for 5-10 millimeters at low current and low wire feeding speed. The method has the advantages of simplifying a machining process, lowering the production cost, reducing the machining procedures of the conventional process, shortening the production time, reducing the workload, increasing the production efficiency, lowering the material consumption and saving cost; and the welding process has high repeatability, and is easy to realize automatic production.
Description
(1) technical field
The present invention relates to solder technology, is exactly shell copper alloy conduction band TIG automatic surfacing method specifically.
(2) background technology
Steel matrix surface heap applies conduction, heat conductivility and the case hardness that copper alloy layer can improve steel, and this technology is widely used in aerospace field and weapons manufacture field.The for example assembling of shell bearing band, traditional handicraft adopts mechanical system chimeric copper alloy ring on steel matrix, this mode has increased stress and has concentrated, weakened body intensity, the wall thickness at annular groove place can make this body endoporus aperture, place dwindle, thereby increased the technology difficulty of processing body, reduced explosive payload, reduced brisance.Simultaneously, when body processing annular groove is taken a lot of work, cutter, increase production cost.
The development trend of world today's shell is heavy caliber, thin bullet wall, multiple warhead, a bullet multipotency, the developing intellectual resource shell.The key technology that improves bullet fighting capacity is the band assembly technology, is the technical bottleneck that puzzlement China shell manufactures and designs for many years always, adopts the band assembly of mechanical chimeric mode can not adapt to the development trend of following shell.
Carry out the remarkable advantage of band assembly in view of adopting welding procedure, the bearing band solder technology has been launched widely research both at home and abroad, the welding method that relates to comprises that diffusion welding (DW) bearing band coupling technique, Laser Welding technology, flame spray welding technology, electron beam axis are to solder technology etc., these methods all have certain difficulty and limitation, are not applied in the actual production.Since built-up welding be with matrix as an electrode, and electric arc heated temperature and heat are inhomogeneous, and matrix very easily melts.Conventional built-up welding dilution rate even if strip surfacing also has sizable dilution rate, is oozed technological difficulties and the key factor that affects welding performance that iron has become bead-welding technology often greater than 10%.Because iron and copper alloy have larger physical property difference, when excessive iron enters copper alloy layer, can in copper alloy layer, cause great stress to concentrate and serious infiltration crack defect.Simultaneously, excessive iron also can make the hardness of copper alloy layer sharply raise, and makes the friction and wear behavior of copper alloy layer occur greatly to change.In Aero-Space and the manufacturing product manufacturing of weapons, often require extremely low dilution rate even require zero dilution rate namely without fusion penetration.And manual electric arc pile up welding technique is adopted at present domestic built-up welding mostly, and not only welding efficiency is low, and poor welding quality, overlay cladding dilution rate are low.Thereby welding procedure and the corresponding shell automatic soldering device of research high-quality, high efficiency, ultra-thin fusion penetration to improving the development of shell production efficiency and China's national defense cause, have important theory significance and practical significance.
(3) summary of the invention
The object of the present invention is to provide a kind of bearing band welding procedure that can guarantee high-quality, adopt heated filament, cold silk mariages wire feed system, improve welding efficiency, reduce overlay cladding dilution rate, adopt the shell copper alloy conduction band TIG automatic surfacing method of PLC control system.
The object of the present invention is achieved like this: welding procedure is as follows:
Step 1: by the man-machine control of PLC interface, control welding head and welding work pieces motion, after the relative position of centering welding gun and workpiece, preset welding current, missile rotation speed and rotary mode by PLC, at the uniform velocity with two kinds of patterns of stepping, body adopts the uniform rotation pattern during the narrower bearing band of built-up welding, adopts the stepping rotation mode when built-up welding bearing band is wider, cold silk, heated filament wire feed rate, welding head amplitude of fluctuation and speed, put forward the parameter of arc time and electric current, Real Time Observation and adjusting;
Step 2: the welding arc front logical cooling water that ignites, cooling welding tool and body; Welding gun moves into place, the heated filament electric arc that ignites, welding main arc, and heated filament, cold silk are sent to simultaneously;
Step 3: after the built-up welding starting the arc, adopt little electric current, low wire feed rate built-up welding 5-10mm; Then adopt wire feed rate and the welding current that satisfies the requirement of bearing band forming dimension; During built-up welding one thoughtful built-up welding original position, promote the electric arc height, reduce simultaneously speed of welding, promote welding current, finish the bearing band overlap joint of section start 5-10mm length, overlap joint is finished the after-current decay, arc extinction, and wire feed stops, and finishes the welding of a bearing band;
Step 4: welding is closed the source of welding current after finishing, and moves lower workpiece by blanking device after stopping the supple of gas or steam, cutting off the water, and feed mechanism is fixed next shell body simultaneously, carries out the weld deposit process of next bearing band.
Simplified processing process of the present invention reduces production costs, and has reduced the manufacturing procedure of traditional handicraft, reduces production time and workload, has improved productivity ratio, and cutting down the consumption of raw materials is saved cost.Improve connection reliability, the welding procedure good reproducibility, easily be automated production.Optimize the body structure design, simplified the coyote hole structure, be conducive to solve trough of belt intensity difference, problem that margin of safety is little.Shell copper alloy conduction band TIG automatic surfacing method of the present invention, be a kind of efficient, automatically, the shell conduction band welder of low dilution rate, the bearing band welding procedure of high-quality can be provided, adopt heated filament, cold silk mariages wire feed system, improve the dilution rate of welding efficiency, reduction overlay cladding, adopt simultaneously the PLC control system, accurately control welding process parameter and tool locating, especially the strict control of welding current waveform, wire feed rate has guaranteed the particularly appearance of weld attractive in appearance of lap-joint of built-up welding bearing band layer.
(4) description of drawings
Fig. 1 is apparatus of the present invention overall structure schematic diagram;
Fig. 2 is heated filament systematic schematic diagram of the present invention;
Fig. 3 is the body automatic surfacing PLC of system control system block diagram of the present invention;
Fig. 4 is that welding current and body rotate, the wire feed rate curve;
Fig. 5 is bearing band automatic surfacing flow chart.
(5) specific embodiment
The invention will be further described for example below in conjunction with accompanying drawing.
Described welding system (21) comprises cold silk wire-feed motor (1), heated filament wire-feed motor (2), heater supply (3), the TIG built-up welding source of welding current (4), welding gun (5), cold silk wire feeding mouth (6), heated filament wire feeding mouth (7), body back water drenches pipe (8) and water tank (9), cold silk wire-feed motor (1) connects heated filament wire-feed motor (2), heated filament wire-feed motor (2) connects heater supply (3), the TIG built-up welding source of welding current (4) is arranged on the right side of device, welding gun (5) connects cold silk wire feeding mouth (6) and heated filament wire feeding mouth (7), body back water drenches the below that pipe (8) is arranged on cold silk wire feeding mouth (6) and heated filament wire feeding mouth (7), and water tank (9) is arranged on the right side of the TIG built-up welding source of welding current (4).
Described welding system motor adjustment mechanism (22) is by welding head lengthwise movement drive motors (10), welding head centering adjusting knob (11), welding head lengthwise movement system (12), welding head teeter system (13) and welding head teeter drive motors (14) form, welding head lengthwise movement drive motors (10) connecting welding head centering adjusting knob (11) and welding head lengthwise movement system (12), welding head teeter system (13) connecting welding head teeter drive motors (14).
Described body motion (23) comprises pneumatic cylinder (15), hold out against seat (16), (18) are driven in carriage (17) and body rotation, pneumatic cylinder (15) connection holds out against seat (16), carriage (17) is arranged on the device middle part, and the body rotation is driven (18) and is arranged on carriage (17) left side.
Among Fig. 1, (19) are control panel, and (20) are the built-up welding body.
Embodiment 2, in conjunction with Fig. 1, and Fig. 2, shell copper alloy conduction band TIG automatic surfacing method of the present invention, welding procedure is as follows:
Step 1: by the man-machine control of PLC interface, control welding head and welding work pieces motion, after the relative position of centering welding gun and workpiece, preset welding current, missile rotation speed and rotary mode by PLC, at the uniform velocity with two kinds of patterns of stepping, body adopts the uniform rotation pattern during the narrower bearing band of built-up welding, adopts the stepping rotation mode when built-up welding bearing band is wider, cold silk, heated filament wire feed rate, welding head amplitude of fluctuation and speed, put forward the parameter of arc time and electric current, Real Time Observation and adjusting;
Step 2: the welding arc front logical cooling water that ignites, cooling welding tool and body; Welding gun moves into place, the heated filament electric arc that ignites, welding main arc, and heated filament, cold silk are sent to simultaneously;
Step 3: after the built-up welding starting the arc, adopt little electric current, low wire feed rate built-up welding 5-10mm; Then adopt wire feed rate and the welding current that satisfies the requirement of bearing band forming dimension; During built-up welding one thoughtful built-up welding original position, promote the electric arc height, reduce simultaneously speed of welding, promote welding current, finish the bearing band overlap joint of section start 5-10mm length, overlap joint is finished the after-current decay, arc extinction, and wire feed stops, and finishes the welding of a bearing band;
Step 4: welding is closed the source of welding current after finishing, and moves lower workpiece by blanking device after stopping the supple of gas or steam, cutting off the water, and feed mechanism is fixed next shell body simultaneously, carries out the weld deposit process of next bearing band.
Embodiment 3, in conjunction with Fig. 1, realize shell copper alloy conduction band TIG automatic surfacing device of the present invention, have automatic charging and clamping mechanism, welding head can carry out automatic swing by bearing band width on request, welding head can be realized the freely-movable of X-Y two-dimensional directional, can realize the adjusting realization welding gun of Z direction and the centering of built-up welding body simultaneously; Body can carry out at the uniform velocity rotating two kinds of rotation modes with stepping under the effect of missile rotation drive system, and wherein at the uniform velocity rotation is suitable for narrower bearing band welding, and stepping is rotated and is suitable for wider bearing band welding.All welding parameters all can be preseted also by control panel can weld real-time control and adjusting.The workpiece motion s mode is: by hold out against seat, the carriage pneumatic means fixedly treats the built-up welding body, welding head can move along the Two Dimensional Free that the leading screw that moves carries out the X-Y direction by motor-driven; Also can under regulating, the centering adjusting knob carry out Z direction centering adjustment movement simultaneously; The built-up welding body can carry out at the uniform velocity rotating with stepping under motor-driven, finishes the welding of circumference bearing band; In the welding process, can control by the horizontal amplitude of oscillation of welding head the width of built-up welding bearing band; Adopt the independent wire feeder of two covers, control respectively the feed rate of cold silk and heated filament.
Shell copper alloy conduction band TIG automatic surfacing method of the present invention adopts cold silk, heated filament mariages wire feed system, improves built-up welding efficient and bearing band attractive in appearance and is shaped; Adopt body back water-cooling system, reduce the diffusion in the surfacing of Cu alloy-layer of Fe element in the steel matrix, reduce simultaneously the distortion of thin bullet wall matrix; Employing PLC is master controller, finishes the functions such as detection of control, welding parameter control and position signalling and the welding parameter of each execution action of welding process.For the automation that guarantees the bearing band weld deposit process and the shaping of controlling bearing band, after the built-up welding starting the arc, adopt little electric current, low wire feed rate built-up welding 5-10mm; Then adopt wire feed rate and the welding current that satisfies the requirement of bearing band forming dimension; During built-up welding one thoughtful built-up welding original position, promote the electric arc height, reduce simultaneously speed of welding, promote welding current, finish the bearing band overlap joint of initial section start 5-10mm length, overlap joint is finished the after-current decay, arc extinction, wire feed stops, and finishes the welding of a bearing band.
Embodiment 4, and in conjunction with Fig. 4, Fig. 5, shell copper alloy conduction band TIG automatic surfacing method of the present invention has following technical characterictic:
The independent wire feeder of employing two covers, the cold silk that melts simultaneously unlike material is shaped and performance with heated filament, raising welding efficiency, optimization bearing band; Adopt the back water-cooling pattern, reduction body fusing amount reaches the dilution rate to overlay cladding;
Adopt two main drive motors, drive respectively the automatic rotating of body in welding gun automatic swing and the welding process; Realize shell copper alloy conduction band TIG automatic surfacing device of the present invention, comprise the two cover sources of welding current, be respectively applied to preheating wire welding and filler wire is finished weld deposit process; Adopt automatic charging, cutting agency, realize the pipeline system automated production; By protection screen and console, can realize Real-Time Monitoring and control to welding process;
Employing PLC control system is controlled and is welded fixing and setting and real-time control mobile, welding parameter of mobile device and welding work pieces in the whole welding process;
Adopt variable-current shown in Figure 4, variation body rotating speed and alternate wire-feed speed to guarantee the shaping of bearing band lap-joint, the welding process figure of whole bearing band as shown in Figure 5.
Claims (1)
1. a shell copper alloy conduction band TIG automatic surfacing method is characterized in that, method is as follows:
Step 1: by the man-machine control of PLC interface, control welding head and welding work pieces motion, after the relative position of centering welding gun and workpiece, preset welding current, missile rotation speed and rotary mode by PLC, at the uniform velocity with two kinds of patterns of stepping, body adopts the uniform rotation pattern during the narrower bearing band of built-up welding, adopts the stepping rotation mode when built-up welding bearing band is wider, cold silk, heated filament wire feed rate, welding head amplitude of fluctuation and speed, put forward the parameter of arc time and electric current, Real Time Observation and adjusting; Welding head can move along the Two Dimensional Free that the leading screw that moves carries out the X-Y direction by motor-driven; Also can under regulating, the centering adjusting knob carry out Z direction centering adjustment movement simultaneously; The built-up welding body can carry out at the uniform velocity rotating with stepping under motor-driven, finishes the welding of circumference bearing band; In the welding process, control the width of built-up welding bearing band by the horizontal amplitude of oscillation of welding head; Adopt the independent wire feeder of two covers, control respectively the feed rate of cold silk and heated filament;
Step 2: the welding arc front logical cooling water that ignites, cooling welding tool and body; Welding gun moves into place, the heated filament electric arc that ignites, welding main arc, and heated filament, cold silk are sent to simultaneously;
Step 3: after the built-up welding starting the arc, adopt little electric current, low wire feed rate built-up welding 5-10mm; Then adopt wire feed rate and the welding current that satisfies the requirement of bearing band forming dimension; During built-up welding one thoughtful built-up welding original position, promote the electric arc height, reduce simultaneously speed of welding, promote welding current, finish the bearing band overlap joint of section start 5-10mm length, overlap joint is finished the after-current decay, arc extinction, and wire feed stops, and finishes the welding of a bearing band;
Step 4: welding is closed the source of welding current after finishing, and moves lower workpiece by blanking device after stopping the supple of gas or steam, cutting off the water, and feed mechanism is fixed next shell body simultaneously, carries out the weld deposit process of next bearing band.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110044345 CN102133673B (en) | 2009-03-26 | 2009-03-26 | TIG (Tungsten Inert Gas) automatic surfacing method for projectile copper alloy conduction band |
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| CN 201110044345 CN102133673B (en) | 2009-03-26 | 2009-03-26 | TIG (Tungsten Inert Gas) automatic surfacing method for projectile copper alloy conduction band |
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| CN200910071635XA Division CN101508049B (en) | 2009-03-26 | 2009-03-26 | Automatic building-up technique and device of shell copper alloy conduction band TIG |
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| CN102133673A CN102133673A (en) | 2011-07-27 |
| CN102133673B true CN102133673B (en) | 2013-04-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103071891B (en) * | 2012-12-28 | 2015-07-15 | 哈尔滨工业大学 | Method for welding composite bearing band of soft iron mixed with pure copper, and structure of composite bearing band |
| CN103817414B (en) * | 2014-02-17 | 2015-12-30 | 哈尔滨电气动力装备有限公司 | The tungsten argon arc hot wire welding bead-welding technology of main pump motor axle and flywheel |
| CN105798451A (en) * | 2016-05-23 | 2016-07-27 | 哈尔滨万洲焊接技术有限公司 | Method for preparing copper cartridge belt in self-propagating manner with assistance of mechanical vibration |
| CN105798452A (en) * | 2016-05-23 | 2016-07-27 | 哈尔滨万洲焊接技术有限公司 | Method for preparing copper cartridge belt in self-propagating manner with assistance of supersonic vibration |
| CN111250835B (en) * | 2020-02-05 | 2021-10-29 | 哈尔滨工业大学 | Annular elastic band lapping multi-parameter collaborative adjustment arc lifting and flow raising method |
| CN111730177B (en) * | 2020-05-20 | 2021-07-13 | 山东大学 | Low-dilution-rate double-filler-wire TIG surfacing process and application thereof |
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| CN1451507A (en) * | 2003-04-17 | 2003-10-29 | 西北工业大学 | Method for welding bearing band |
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Patent Citations (2)
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|---|---|---|---|---|
| CN1451507A (en) * | 2003-04-17 | 2003-10-29 | 西北工业大学 | Method for welding bearing band |
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Non-Patent Citations (4)
| Title |
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| 弹带的MIG钎堆焊技术研究;马王哲等;《第十一次全国焊接会议论文集》;20050401;第234－236页 * |
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