CN113134669A - Heating device in plasma welding box - Google Patents
Heating device in plasma welding box Download PDFInfo
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- CN113134669A CN113134669A CN202110452574.2A CN202110452574A CN113134669A CN 113134669 A CN113134669 A CN 113134669A CN 202110452574 A CN202110452574 A CN 202110452574A CN 113134669 A CN113134669 A CN 113134669A
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- heating
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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
- B23K10/00—Welding or cutting by means of a plasma
- B23K10/02—Plasma welding
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Abstract
The invention discloses a heating device in a plasma welding box, which comprises a heating chamber outer shell, a plasma welding gun arranged at the upper end of the heating chamber outer shell, a heating platform positioned in the heating chamber outer shell and a heating pipe arranged on the heating platform; the heating pipe is externally connected with a heating control system, and is also provided with a temperature monitoring module which is electrically connected with the heating control system and is used for transmitting a temperature signal of the heating pipe to the heating control system; the heating device also comprises a plurality of layers of refractory bricks and water cooling plates which are positioned below the heating platform. The heating device heats the workpiece in a heat conduction mode, and performs heat preservation and slow cooling treatment, so that cracks of the workpiece caused by stress concentration can be effectively avoided, the specified temperature can be set in the heat conduction heating mode, and the temperature error can be controlled in a smaller range; the sliding module is arranged on the heating chamber outer shell to adjust the position of the plasma welding gun, so that the welding gun can be effectively protected.
Description
Technical Field
The invention belongs to the technical field of welding equipment, and particularly relates to a heating device in a plasma welding box.
Background
Plasma welding is a high-energy beam fusion welding method, which utilizes high voltage and high-frequency oscillation to break down air to form plasma arc, and the plasma arc melts a workpiece to realize welding. Compared with the traditional argon arc welding, the plasma welding has the characteristics of high energy density, high welding speed, large depth-to-width ratio, small stress deformation and the like.
When the plasma welding method is adopted, due to the fact that the temperature of a welding seam is sharply increased and the cooling rate is too high after welding, cracks are often generated on the surface of a workpiece and the welding seam due to stress concentration, and the workpiece is prone to cracking particularly when the workpiece is a brittle metal material. The occurrence of cracks, which seriously affect the performance of the workpiece and subsequent applications, should be avoided. Pre-weld preheating and post-weld heat preservation are generally adopted to solve the problems, so that a heating device is extremely necessary to be arranged in a welding box.
Generally, the heating device can be classified into contact heating and non-contact heating. Chinese patent (publication No. CN102962611A) discloses a dynamic welding device for large-scale thick-wall workpieces, which comprises a heating furnace, wherein the heating furnace is provided with a cylindrical cavity with an open upper end, a heat-insulating layer is arranged on the inner side wall and the inner bottom wall of the cavity, a plurality of burners are arranged on the upper bottom surface of the heat-insulating layer at the bottom, and the workpieces are heated by heat sprayed by the burners. This patent pertains to non-contact heating, where rotation is used to heat the workpiece more uniformly, but it is difficult to control the heating temperature.
Chinese patent (publication No. CN208033953U) discloses a welding heating device, which includes an upper welding seat and a lower welding seat, wherein heating devices are disposed inside the upper welding seat and the lower welding seat, the heating devices are disc-type induction coils, a first graphite plate is disposed at the lower end of the upper welding seat, a second graphite plate is disposed at the upper end of the lower welding seat, and the first graphite plate and the second graphite plate are heated by the disc-type induction coils, so as to heat a clamped workpiece.
Chinese patent (publication No. CN111055055A) discloses a cylinder inner wall circular seam welding heating device, which comprises an electric heating belt and an elastic steel belt, wherein the electric heating belt is laid on the inner wall of a cylinder along a circular seam, the elastic steel belt is curled to be annularly overlapped on the electric heating belt, and the electric heating belt is tightly attached to the inner wall of the cylinder by utilizing the elasticity of the elastic steel belt.
Both of the above patents utilize contact heating, but are directed to welded workpieces of specific shapes and lack specific heat retention measures.
Disclosure of Invention
The heating device in the plasma welding box provided by the invention can be arranged in the plasma welding box, the clamp is adjusted according to the shape of a workpiece, and a good heat preservation device and a protection device for a plasma welding gun are arranged. In addition, the invention can realize integral heating of the workpiece and accurately control the heating temperature.
The heating device comprises a heating chamber outer shell, a plasma welding gun arranged at the upper end of the heating chamber outer shell, a heating platform positioned in the heating chamber outer shell and a heating pipe arranged on the heating platform;
the heating pipe is externally connected with a heating control system, the heating pipe is further provided with a temperature monitoring module, the temperature monitoring module is electrically connected with the heating control system, and the temperature monitoring module is used for transmitting a temperature signal of the heating pipe to the heating control system.
As a further explanation of the present invention, a plurality of jacks distributed horizontally are disposed on the heating platform, and the heating pipe is assembled in the jacks.
As a further explanation of the invention, the heating device further comprises a plurality of layers of refractory bricks and a water cooling plate which are positioned below the heating platform, the plurality of layers of refractory bricks are positioned between the water cooling plate and the heating platform, and the water cooling plate is externally connected with the water cooling device.
As a further explanation of the invention, the heating platform, the refractory bricks and the water cooling plate are all provided with threaded holes which are vertically distributed, so that the heating platform, the refractory bricks and the water cooling plate can be connected and fixed by matching screws with the threaded holes.
As a further explanation of the invention, the heating device also comprises heat insulation cotton and a coaming, the peripheries of the heating platform and the refractory bricks are matched and connected with the heat insulation cotton, and the peripheries of the heat insulation cotton are connected with the coaming.
As a further explanation of the present invention, a T-shaped groove is provided on the heating platform.
As a further explanation of the present invention, the heating chamber outer casing includes two parts, a heating chamber upper casing and a heating chamber lower casing, and the heating chamber upper casing is slidably mounted on a horizontal moving frame at an upper end of the heating chamber lower casing so that the heating chamber upper casing can be moved out of the heating chamber lower casing.
As a further explanation of the invention, the upper end of the upper shell of the heating chamber is further provided with an opening, the plasma welding torch extends into the outer shell of the heating chamber through the opening, one side of the opening is provided with a sliding module, the sliding module is connected with the upper end of the plasma welding torch, and the sliding module is used for extending the plasma welding torch into and out of the outer shell of the heating chamber.
As a further explanation of the present invention, a heat insulation cover plate is further disposed on the opening.
As a further description of the invention, the heating chamber outer shell is formed by fixedly connecting an inner aluminum silicate plate and an outer metal plate, and heat insulation cotton is stuffed between the aluminum silicate plate and the metal plate.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention designs a heating device in a plasma welding box, aiming at the problem that the traditional plasma welding workpiece is easy to crack. The heating device heats the workpiece in a heat conduction mode, and performs heat preservation and slow cooling treatment, so that cracks of the workpiece caused by stress concentration can be effectively avoided. The heating mode of heat conduction can be set to be a designated temperature, and the temperature error can be controlled in a smaller range, so that great help is brought to experimental research; in addition, the heating device is also provided with a sliding module to adjust the position of the plasma welding gun, so that the welding gun can be effectively protected.
Drawings
FIG. 1 is a schematic structural view of a heating device in a plasma welding chamber according to the present invention;
fig. 2 is a schematic structural diagram of a sliding module for controlling a plasma welding gun according to the present invention.
Description of reference numerals:
1. welding the outer shell of the box; 11. an upper housing of the heating chamber; 111. an opening; 112. a heat insulating cover plate; 12. a heating chamber lower housing; 2. a plasma welding gun; 3. a heating platform; 31. a T-shaped slot; 32. a threaded hole; 4. heating a tube; 5. heat insulation cotton; 6. enclosing plates; 7. a refractory brick; 8. a water-cooling plate; 9. a sliding module.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The technical solution of the present invention will be explained with reference to specific embodiments.
As shown in fig. 1, a heating device in a plasma welding chamber comprises a heating chamber outer shell 1, a plasma welding gun 2 arranged at the upper end of the heating chamber outer shell 1, a heating platform 3 positioned in the heating chamber outer shell 1 and a heating pipe 4 arranged on the heating platform 3;
the heating pipe 4 is externally connected with a heating control system, a temperature monitoring module is further arranged on the heating pipe 4, the temperature monitoring module is electrically connected with the heating control system, and the temperature monitoring module is used for transmitting a temperature signal of the heating pipe 4 to the heating control system.
In order to effectively improve the uniform heating performance of the heating tube 4 on the heating platform 3, a plurality of jacks distributed horizontally are arranged on the heating platform 3, and the heating tube 4 is assembled in the jacks.
In an achievable form, as shown in fig. 1, the heating device further comprises a plurality of layers of refractory bricks 7 and a water-cooled plate 8 located below the heating platform 3, the plurality of layers of refractory bricks 7 being located between the water-cooled plate 8 and the heating platform 3, the water-cooled plate 8 externally connecting a water-cooling device; the heating device further comprises heat insulation cotton 5 and a coaming 6, the peripheries of the heating platform 3 and the refractory bricks 7 are matched and connected with the heat insulation cotton 5, and the peripheries of the heat insulation cotton 5 are connected with the coaming 6;
the arrangement of the heat insulation cotton 5 and the refractory bricks 7 can reduce the heat loss of the heating platform 3 and prevent the enclosing plate 6 from being damaged by contacting with the heating platform 3; the water cooling plate 8 plays a role in heat dissipation, a water cooling device externally connected with the water cooling plate 8 can adopt a circulating water cooling machine, the circulating water cooling machine leads output cooling water into the water cooling plate 8, and the water carrying heat is circulated to the water cooling machine for cooling after the cooling.
In order to conveniently and fixedly connect the heating platform 3, the refractory bricks 7 and the water cooling plate 8, as shown in fig. 1, threaded holes 32 which are vertically distributed are formed in the heating platform 3, the refractory bricks 7 and the water cooling plate 8, so that the heating platform 3, the refractory bricks 7 and the water cooling plate 8 can be connected and fixed by matching the threaded holes 32 with screws.
As shown in fig. 1, a T-shaped groove 31 is provided on the heating platform 3, and a fixture for clamping a sample to be welded can be easily assembled on the T-shaped groove 31 and can be moved to change positions according to welding requirements.
When the heating device in the plasma welding box is used, the heating device is placed in the plasma welding box, the heating control system and the water cooling device are externally connected to the outer side of the plasma welding box, the position of the clamp can be adjusted according to the shape of a workpiece, and the heating device is provided with a good heat preservation function and a good water cooling device, so that the integral heating of the workpiece can be realized, and the heating temperature can be accurately controlled.
A heating chamber is formed between the heating chamber outer shell 1 and the heating platform 3, and the plasma welding torch 2 needs to be operated in the heating chamber during welding.
In a practical form, as shown in fig. 1, the heating chamber outer casing 1 includes two parts, a heating chamber upper casing 11 and a heating chamber lower casing 12, and the heating chamber upper casing 11 is slidably mounted on a horizontal moving frame at the upper end of the heating chamber lower casing 12, so that the heating chamber upper casing 11 can move out of the heating chamber lower casing 12, thereby exposing the heating chamber for placing and taking samples.
As shown in fig. 1 and 2, an opening 111 is further formed in the upper end of the heating chamber upper shell 11, the plasma welding torch 2 extends into the heating chamber outer shell 1 through the opening 111, a sliding module 9 is arranged on one side of the opening 111, the sliding module 9 is connected with the upper end of the plasma welding torch 2, and the sliding module 9 is used for extending the plasma welding torch 2 into and out of the heating chamber outer shell 1.
When the temperature of the heating stage 3 gradually rises, the plasma torch 2, which is in the heating chamber for a long time, is damaged due to heat radiation. Therefore, a slide module 9 is installed on the opening 111 side of the upper housing 11 of the heating chamber, and can control the elevation and the small displacement adjustment in the horizontal direction of the plasma torch 2.
As shown in fig. 2, an insulating cover plate 112 is further disposed on the opening 111; in the temperature rising stage, the heat insulation cover plate 112 is closed, so that the heat loss can be effectively prevented, and the plasma welding gun 2 is positioned outside the upper shell 11 of the heating chamber. During welding, the heat insulation cover plate 112 is opened, the sliding module 9 is started, and the plasma welding torch 2 extends into the heating chamber for welding. After the welding is finished, the sliding module 9 is started, the plasma welding torch 2 is lifted to leave the heating chamber, and the heat insulation cover plate 112 is closed, so that the plasma welding torch 2 is protected.
In order to reduce heat loss and realize good heat preservation effect, the heating chamber shell body 1 is composed of an inner side aluminum silicate plate and an outer side metal plate which are fixedly connected, and heat insulation cotton 5 is stuffed between the aluminum silicate plate and the metal plate.
The use principle of the plasma welding box is as follows:
when the heating device provided by the invention is used, the heating device is arranged in the chargeable argon plasma welding box so as to meet the requirement that argon is required to be introduced as shielding gas during plasma welding.
Before welding, the heating chamber upper housing 11 is moved, the jig with the workpiece mounted thereon is fixed to the heating stage 3, and the heating chamber upper housing 11 is closed. The heating pipe 4 is started, the specified temperature is set in the heating control system, the heating pipe 4 is kept warm after reaching the specified temperature, and due to heat conduction, the heating platform 3 and the workpiece can be gradually heated and reach the specified temperature. The invention adopts a heat conduction heating mode and good heat preservation measures, and can accurately control the temperature of the workpiece during welding. After the workpiece reaches the specified temperature, the plasma welding gun 2 can be started for welding. After welding, the workpiece can be continuously subjected to heat preservation or slow cooling treatment. In the whole welding process, the sample is in an argon atmosphere.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The utility model provides a heating device in plasma welding case which characterized in that: the plasma welding device comprises a heating chamber outer shell (1), a plasma welding gun (2) arranged at the upper end of the heating chamber outer shell (1), a heating platform (3) positioned in the heating chamber outer shell (1) and a heating pipe (4) arranged on the heating platform (3);
the heating pipe (4) is externally connected with a heating control system, a temperature monitoring module is further arranged on the heating pipe (4), the temperature monitoring module is electrically connected with the heating control system, and the temperature monitoring module is used for transmitting a temperature signal of the heating pipe (4) to the heating control system.
2. The heating apparatus in a plasma welding chamber of claim 1, wherein: the heating platform (3) is provided with a plurality of jacks which are horizontally distributed, and the heating pipe (4) is assembled in the jacks.
3. The heating apparatus in a plasma welding chamber of claim 1, wherein: the heating device further comprises a plurality of layers of refractory bricks (7) and a water cooling plate (8) which are positioned below the heating platform (3), the plurality of layers of refractory bricks (7) are positioned between the water cooling plate (8) and the heating platform (3), and the water cooling plate (8) is externally connected with a water cooling device.
4. The heating apparatus in a plasma welding chamber of claim 3, wherein: the heating platform (3), the refractory bricks (7) and the water cooling plate (8) are all provided with threaded holes (32) which are vertically distributed, so that the heating platform (3), the refractory bricks (7) and the water cooling plate (8) can be connected and fixed through the threaded holes (32) in a screw rod matching mode.
5. The heating apparatus in a plasma welding chamber of claim 3, wherein: the heating device further comprises heat insulation cotton (5) and a surrounding plate (6), the heating platform (3) and the periphery of the refractory brick (7) are connected with the heat insulation cotton (5) in a matched mode, and the periphery of the heat insulation cotton (5) is connected with the surrounding plate (6).
6. The heating apparatus in a plasma welding chamber of claim 1, wherein: and a T-shaped groove (31) is formed in the heating platform (3).
7. The heating apparatus in a plasma welding chamber of claim 1, wherein: the heating chamber outer shell (1) comprises an upper heating chamber shell (11) and a lower heating chamber shell (12), wherein the upper heating chamber shell (11) is slidably mounted on a horizontal moving frame at the upper end of the lower heating chamber shell (12), so that the upper heating chamber shell (11) can be moved out of the lower heating chamber shell (12).
8. The heating apparatus in a plasma welding chamber of claim 7, wherein: casing (11) upper end still sets up opening (111) on the heating chamber, plasma welding torch (2) pass through opening (111) stretches into in the heating chamber shell body (1), opening (111) one side sets up slip module (9), slip module (9) with plasma welding torch (2) upper end is connected, slip module (9) be used for with plasma welding torch (2) stretch into and stretch out heating chamber shell body (1).
9. The heating apparatus in a plasma welding chamber of claim 8, wherein: the opening (111) is also provided with a heat insulation cover plate (112).
10. The heating apparatus in a plasma welding chamber of claim 1, wherein: the heating chamber shell body (1) comprises inboard aluminum silicate board and outside metal sheet fixed connection, just aluminum silicate board with thermal-insulated cotton (5) are filled in between the metal sheet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110452574.2A CN113134669B (en) | 2021-04-26 | 2021-04-26 | Heating device in plasma welding box |
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| CN202110452574.2A CN113134669B (en) | 2021-04-26 | 2021-04-26 | Heating device in plasma welding box |
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| CN113134669A true CN113134669A (en) | 2021-07-20 |
| CN113134669B CN113134669B (en) | 2023-07-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113634862A (en) * | 2021-09-16 | 2021-11-12 | 无锡市新达共创纳米科技有限公司 | Plasma surfacing method for refractory brick mold surface |
| CN114918520A (en) * | 2022-06-21 | 2022-08-19 | 石河子大学 | Plasma surfacing control system for preventing inner hole cracks from being generated |
| CN114932300A (en) * | 2022-06-21 | 2022-08-23 | 石河子大学 | Plasma surfacing equipment for preventing inner hole cracks from being generated |
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| CN212822238U (en) * | 2020-07-31 | 2021-03-30 | 沈阳明日航材设备技术有限公司 | Prestressing force locking heating platform |
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| JP2006043768A (en) * | 2004-06-29 | 2006-02-16 | Nippon Steel Corp | Method and apparatus for coating thin metallic sheet onto thick metallic base material surface |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113634862A (en) * | 2021-09-16 | 2021-11-12 | 无锡市新达共创纳米科技有限公司 | Plasma surfacing method for refractory brick mold surface |
| CN114918520A (en) * | 2022-06-21 | 2022-08-19 | 石河子大学 | Plasma surfacing control system for preventing inner hole cracks from being generated |
| CN114932300A (en) * | 2022-06-21 | 2022-08-23 | 石河子大学 | Plasma surfacing equipment for preventing inner hole cracks from being generated |
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|---|---|
| CN113134669B (en) | 2023-07-07 |
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