CN202639611U - Arc length regulator - Google Patents
Arc length regulator Download PDFInfo
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- CN202639611U CN202639611U CN 201220161080 CN201220161080U CN202639611U CN 202639611 U CN202639611 U CN 202639611U CN 201220161080 CN201220161080 CN 201220161080 CN 201220161080 U CN201220161080 U CN 201220161080U CN 202639611 U CN202639611 U CN 202639611U
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- arc length
- stepper motor
- welding
- controller
- transmission mechanism
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Abstract
An arc length regulator comprises a drive device, a transmission mechanism, a clamping mechanism and a controller, wherein a stepping motor is adopted on the drive device, the output end of the stepping end is in a transmission connection with the clamping mechanism through the transmission mechanism, a lead screw nut is adopted for the transmission of the transmission mechanism, an output shaft of the stepping motor is coaxially connected with a rotary lead screw of a regulating mechanism, and the stepping motor is in a control connection with the controller; and a single chip microcomputer is adopted as the core of the controller. The arc length regulator has the advantages of being high in control accuracy of arc length and convenient to regulate manually.
Description
Technical field
The utility model relates to the adjusting device of welding arc height in the TIG welding process, particularly a kind of arc length adjuster.
Background technology
As the Heliarc welding of nonconsumable electrode, utilize electric arc between tungsten electrode and the workpiece to make metal molten and form weld seam with pure tungsten or activation tungsten (thorium tungsten, cerium tungsten, zirconium tungsten, lanthanum tungsten).Tungsten electrode does not melt in the welding process, only plays electrode.While sends argon gas to by the nozzle of welding torch or helium is protected.Also can add in addition as required metal, this being welded on is commonly referred to as the TIG weldering in the world.The major advantage of TIG welding is that the material ranges that can weld is wide, comprise that thickness is at 0.6mm and above workpiece thereof, material comprises steel alloy, aluminium, magnesium, copper and alloy thereof, grey cast-iron, ordinary steel, various bronze, nickel, silver, titanium and lead. main application is thin and workpiece intermediate gauge of welding, uses as root run on thicker cross section.It is harsh that yet the TIG welding requires environment wind-force, when environment wind-force during greater than 4m/s, will affect the protection effect of gas, and welding efficiency is low, the welding of more suitable fine product members.
In many automatic welding production processes, there is the level of many welded pieces to become shaped form to change, for example two pipes will be done the vertical connection of 90 degree, the level of this road weld seam becomes the state that constantly changes, belong to typical saddle-shape weld seam, this weld seam often runs in boiler manufacturing and petroleum chemical industry.Connect the welding work pieces of this class for pipe fitting, require welding gun to keep constant with respect to the height (arc length) of workpiece, therefore guarantee welding process stable require the height of welding gun will follow curve surface of workpiece in welding process and do continuous adjusting.Present solution has the scheme that adopts the imitative type of machinery to follow the tracks of, but this scheme has significant limitation, if can also use for a kind of workpiece design one cover special equipment, but the various shapes of plane of bending workpiece in the factory has, if the mode that all adopts the imitative type of machinery to follow the tracks of is to be difficult to realize, does not see the imitative type plant engineering of the machinery that is applicable to various workpieces at present yet and use.Also has a kind of welding gun with respect to the workpiece height automatic adjusting device, the long automatic regulator of TIG welding arc.The arc length automatic regulator that uses in the factory at present, the drive motors of its mechanical adjusting mechanism all is to adopt DC servo motor, the shortcoming of this drive motors is that machinery inertial is larger, when control is sent when starting or stoping signal, starting or stoping of motor all will postpone 0.3-0.4 second (measured value), because the inertial delay of servomotor, so that the arc length control accuracy is lower, when many Product jointings of having relatively high expectations, cause welding gun larger with respect to the height change of workpiece, can't satisfy the quality requirement of Product jointing.
The utility model content
The purpose of this utility model is to propose a kind of arc length adjuster, and is lower to the arc length control accuracy when having solved the TIG welding, can't satisfy the problem of Product jointing quality.
For reaching this purpose, the utility model by the following technical solutions:
A kind of arc length adjuster, comprise drive unit, transmission mechanism, clamping device and controller, described drive unit adopts stepper motor, be in transmission connection by transmission mechanism between the output of described stepper motor and the clamping device, described transmission mechanism adopts screw nut driven, the output shaft of described stepper motor is coaxial the connection with the rotational lead screw of governor motion, described stepper motor and controller control connection.
As a preferred version, be connected by shaft coupling between the output shaft of described stepper motor and the leading screw.
As further preferred version, be set with feed screw nut on the leading screw of described transmission mechanism, described feed screw nut upper end also has two guiding feed rods parallel with leading screw, two linear slide bearings respectively are installed on the described guiding feed rod, the bearing holder (housing, cover) place of described linear bearing is connected with slide plate, on the described slide plate welding torch clamping mechanism is installed.
As preferred version further, the opposite end of described stepper motor output shaft is coaxially installed with an initial alignment that is used for manual adjustments welding gun height before the welding and at the manual adjustment wheel of welding process manual adjustments welding gun height.
As the preferred version in a nearlyer step, described stepper motor and controller control connection, described controller adopts single-chip microcomputer, is provided with control panel and display floater on the described controller.
As preferred version further, described leading screw pitch is 2mm.
The beneficial effects of the utility model are: adopt stepper motor to drive, by the coaxial connection screw of stepper motor, the rotation pitch of screw will drive the skateboarding that links to each other with linear bearing on the feed rod, and be fixed on that welding torch clamping mechanism on the slide plate will be followed the rotation of stepper motor and the height of regulating welding gun, thereby reach the purpose of regulating arc length; Adopt stepper motor driven its control accuracy of arc length adjuster far above the servomotor arc length adjuster of present use, the arc length that can effectively solve in the welding process is stable, can guarantee welding process and welding quality stable; By at the coaxial manual adjustment wheel of installing of stepper motor, can make things convenient for the welder to use, can be before welding manual adjustments welding gun height, also can be in welding process manual adjustments welding gun height; This arc length adjuster also can be by the up-down adjustment of the manual crawl welding gun of control panel on controller height, also can in welding process, regulate arc length according to given arc length data closed-loop adaptation, being in a ratio of the operator with other arc length adjusters provides multiple operation to select, and this arc length adjuster has easily advantage of the high and manual adjustments of arc length control accuracy.
Description of drawings
Fig. 1 is the utility model overall structure schematic diagram;
Fig. 2 is the control system schematic diagram of controller.
Among the figure:
1, stepper motor; 2, manual adjustment wheel; 3, leading screw; 4, shaft coupling; 5, bearing; 6, feed screw nut; 7, guiding feed rod; 8, linear slide bearing; 9, slide plate; 10, welding torch clamping mechanism; 11, welding gun; 12, controller; 13, arc voltage filter circuit; 14, A/D conversion; 15, single-chip microcomputer; 16, interface circuit; 17, photoelectric isolating circuit; 18, stepper motor driving circuit; 19, the arc voltage numeral shows.
The specific embodiment
Further specify the technical solution of the utility model below in conjunction with accompanying drawing and by the specific embodiment.
As shown in Figure 1, structural principle schematic diagram for the utility model specific embodiment, this arc length adjuster comprises drive unit, transmission mechanism, clamping device and controller, described drive unit adopts stepper motor 1, be in transmission connection by transmission mechanism between the output of described stepper motor 1 and the clamping device, described transmission mechanism adopts screw nut driven, the output shaft of described stepper motor 1 adopts 4 coaxial connections of shaft coupling with the leading screw of governor motion 3, described stepper motor 1 and controller 12 control connections; Described leading screw pitch is 2mm.
As further preferred version, be set with feed screw nut 6 on the leading screw 3 of described transmission mechanism, described feed screw nut 6 upper ends also have two guiding feed rods 7 parallel with leading screw 3, two linear slide bearings 8 respectively are installed on the described guiding feed rod 7, the bearing holder (housing, cover) place of described linear slide bearing 8 is connected with slide plate 9, on the described slide plate 9 welding torch clamping mechanism 10 is installed, clamping has welding gun 11 on it;
The opposite end of described stepper motor 1 output shaft is coaxially installed with an initial alignment that is used for manual adjustments welding gun height before the welding and at the manual adjustment wheel 2 of welding process manual adjustments welding gun height.
Described controller adopts single-chip microcomputer, is provided with control panel and display floater on the described controller.
Stepper motor 1 in the present embodiment can replace prior art servomotor commonly used, and its advantage is that the machinery inertial of stepper motor is obviously little, and the precision of regulating arc length is high, and controllability is good; It is the rectilinear motion of the corner of stepper motor 1 being realized welding gun 11 by leading screw 3 helical rotation that arc length is regulated, to reach the adjusting of arc length; The effect of feed screw nut 6 is that the screw with leading screw 3 converts rectilinear motion to, and drives slide plate 9 and do rectilinear motion; Two parallel guiding feed rods 7 are arranged in the both sides of leading screw 3, and its effect is that the rotational transform with leading screw 3 becomes stably rectilinear motion, and resistance to sliding is little, makes feed screw nut 6 carrying load abilities strong; For mechanical adjusting mechanism is operated steadily, carrying load ability is strong, on two guiding feed rods 7 two groups of linear slide bearings 8 is housed respectively; Connect one slide-plate 9 on the feed screw nut 6, connect welding torch clamping mechanism 10 at slide plate 9, welding gun 11 is fastened in the welding torch clamping mechanism.
Figure 2 shows that the control system schematic diagram that the utility model adopts, comprise arc voltage filter circuit 13, its function is with executed arc voltage feedback waveform filtering interference signals, gets its mean value as the reference value of arc length; The function of A/D conversion 14 is that the analog quantity with the arc voltage signal converts data signal to; Single-chip microcomputer 15 is core control systems of a whole set of arc length adjuster, its function is: after the arc length adjuster is opened, single-chip microcomputer 15 under programme-control at first by the startup time-delay knob 0-10S on the A/D sampling Read Controller panel, corresponding 0-5V voltage, send into single-chip microcomputer 15 by A/D conversion 14 for data signal, after program judges that the 0-10S time-delay is finished, the given numerical value of arc voltage of sampling respectively again, arc voltage feedback numerical value, the arc voltage control accuracy.When arc voltage feedback numerical value was higher than the given numerical value of arc voltage, single-chip microcomputer 15 was by interface circuit 16, photoelectric isolating circuit 17, and stepper drive circuit 18, control step motor 1 backward rotation then is downward adjusting corresponding to the height of welding gun 11.When arc voltage feedback numerical value was lower than the given numerical value of arc voltage, welding gun 11 was highly then to adjusted.The distance that welding gun 11 is regulated up or down depends on presetting of arc voltage control accuracy on the controller panel, the arc voltage control accuracy is divided into 10 grades, is respectively 0.05V, 0.10V, 0.20V, 0.30V, 0.40V, 0.50V, 0.60V, 0.70V, 0.80V, 0.90V.The arc voltage numeral shows that 19 can show arc voltage numerical value in real time in welding process.Also be provided with rising and decline inching button by 2 interrupt interfaces of single-chip microcomputer, the up and down height of at any time crawl adjusting welding gun 11 also being provided with on the controller panel simultaneously and rising and the decline demonstration.
Employing stepper motor described in the utility model drives, by the coaxial connection screw of stepper motor, the rotation pitch of screw will drive the skateboarding that links to each other with linear bearing on the feed rod, and be fixed on that welding torch clamping mechanism on the slide plate will be followed the rotation of stepper motor and the height of regulating welding gun, thereby reach the purpose of regulating arc length; Adopt stepper motor driven its control accuracy of arc length adjuster far above the servomotor arc length adjuster of present use, the arc length that can effectively solve in the welding process is stable, can guarantee welding process and welding quality stable; By at the coaxial manual adjustment wheel of installing of stepper motor, can make things convenient for the welder to use, can be before welding manual adjustments welding gun height, also can be in welding process manual adjustments welding gun height; This arc length adjuster also can be by the up-down adjustment of the manual crawl welding gun of control panel on controller height, also can in welding process, regulate arc length according to given arc length data closed-loop adaptation, being in a ratio of the operator with other arc length adjusters provides multiple operation to select, and this arc length adjuster has easily advantage of the high and manual adjustments of arc length control accuracy.
Claims (6)
1. arc length adjuster, comprise drive unit, transmission mechanism, clamping device and controller, it is characterized in that: described drive unit adopts stepper motor, be in transmission connection by transmission mechanism between the output of described stepper motor and the clamping device, described transmission mechanism adopts screw nut driven, the output shaft of described stepper motor is coaxial the connection with the rotational lead screw of governor motion, described stepper motor and controller control connection.
2. a kind of arc length adjuster according to claim 1 is characterized in that, is connected by shaft coupling between the output shaft of described stepper motor and the leading screw.
3. a kind of arc length adjuster according to claim 1, it is characterized in that, be set with feed screw nut on the leading screw of described transmission mechanism, described feed screw nut upper end also has two guiding feed rods parallel with leading screw, two linear slide bearings respectively are installed on the described guiding feed rod, the bearing holder (housing, cover) place of described linear bearing is connected with slide plate, on the described slide plate welding torch clamping mechanism is installed.
4. a kind of arc length adjuster according to claim 1, it is characterized in that the opposite end of described stepper motor output shaft is coaxially installed with an initial alignment that is used for manual adjustments welding gun height before the welding and at the manual adjustment wheel of welding process manual adjustments welding gun height.
5. a kind of arc length adjuster according to claim 1 is characterized in that, described stepper motor and controller control connection, and described controller adopts single-chip microcomputer, is provided with control panel and display floater on the described controller.
6. according to claim 1 to 5 arbitrary described a kind of arc length adjusters, it is characterized in that: described leading screw pitch is 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220161080 CN202639611U (en) | 2012-04-16 | 2012-04-16 | Arc length regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220161080 CN202639611U (en) | 2012-04-16 | 2012-04-16 | Arc length regulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202639611U true CN202639611U (en) | 2013-01-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220161080 Expired - Fee Related CN202639611U (en) | 2012-04-16 | 2012-04-16 | Arc length regulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202639611U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102615400A (en) * | 2012-04-16 | 2012-08-01 | 北京华巍中兴电气有限公司 | Arc length adjuster |
| CN103587973A (en) * | 2013-09-24 | 2014-02-19 | 丹阳琦瑞机械有限公司 | Feed device capable of controlling feed amount |
-
2012
- 2012-04-16 CN CN 201220161080 patent/CN202639611U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102615400A (en) * | 2012-04-16 | 2012-08-01 | 北京华巍中兴电气有限公司 | Arc length adjuster |
| CN103587973A (en) * | 2013-09-24 | 2014-02-19 | 丹阳琦瑞机械有限公司 | Feed device capable of controlling feed amount |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20140416 |