CN103521908A - Induction welding device and method for sectional materials - Google Patents
Induction welding device and method for sectional materials Download PDFInfo
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- CN103521908A CN103521908A CN201310451455.0A CN201310451455A CN103521908A CN 103521908 A CN103521908 A CN 103521908A CN 201310451455 A CN201310451455 A CN 201310451455A CN 103521908 A CN103521908 A CN 103521908A
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- section bar
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- 238000003466 welding Methods 0.000 title claims abstract description 114
- 230000006698 induction Effects 0.000 title claims abstract description 110
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000000463 material Substances 0.000 title abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 42
- 238000001816 cooling Methods 0.000 claims abstract description 27
- 238000006073 displacement reaction Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000009721 upset forging Methods 0.000 abstract 2
- 210000001503 joint Anatomy 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000002826 coolant Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- -1 rail Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
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Classifications
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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
- B23K13/00—Welding by high-frequency current heating
- B23K13/01—Welding by high-frequency current heating by induction heating
- B23K13/015—Butt welding
-
- 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
- B23K13/00—Welding by high-frequency current heating
- B23K13/08—Electric supply or control circuits therefor
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/003—Cooling means
-
- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Induction Heating (AREA)
Abstract
Provided are an induction welding device and method for sectional materials. The device comprises an induction welding device body, a PLC control system, a hydraulic system, a cooling system and an induction heating power supply, and further comprises a left mounting plate, a right mounting plate and two sub-coils. The method includes the following steps that two pieces of sectional materials to be welded are located through locating pieces installed on the lower portion of a center shaft of the induction welding device body in a connected mode; a clamping oil cylinder drives two sets of clamp bodies to rotate around the center shaft respectively to clamp and center the sectional materials to be welded; an opening-closing induction heating coil moves the butt joint of the sectional materials with the help of an auxiliary oil cylinder, a locating oil cylinder pushes and wraps the two sub-coils and makes contact with an electrode structure; the PLC control system starts the induction heating coil to heat; when the preset welding temperature is reached, the induction heating power supply is closed, the locating oil cylinder separates the two sub-coils, and an upset forging oil cylinder applies set upset forging force in a heating process of the but joint of the sectional materials all the time to enable end faces of the sectional materials to be welded together; a jaw opens, and the sectional materials are loosened. The induction welding device achieves automatic operation and is high in efficiency.
Description
Technical field
The present invention relates to the solder technology of section bar, particularly about induction welding equipment and method.
Background technology
At present, the section bar such as common rail, reinforcing bar, steel pipe, U-steel is used electric butt welding, induction welding, friction welding (FW) all belong to Pressure Welding category.Pressure Welding in welding process without filling welding material, and low consumption environment protection.Friction welding (FW) is subject to the restriction of spindle motor power, cannot weld heavy in section section bar; And the contact flash welding being widely used at present, all more difficult control of its lintel current density, contact resistance, the fire hole degree of depth, and easily generate the weld defects such as greyness, the quality of Welded Joints and life-span will produce considerable influence.On the other hand, flash welding monitoring process parameter is more, and the process debugging cycle is long, and affected by the factors such as mother metal, machine condition, environment, and joint quality is relatively wayward.
Induction welding is the eddy current effect heating section bar utilizing on alternating magnetic field-electric field induction medium section, makes section bar fusing, thereby realizes a kind of method of welding.Eddy-current heating can be divided into according to the frequency difference of electric current used: high-frequency induction heating (100 kHz ~ 1000kHz), Frequency Induction Heating (1kHz ~ 10kHz) and line-frequency induction heating (50Hz).Intermediate frequency (1 ~ 10KHZ) heat penetration is 2-10mm, is generally used for axle class and the heating of big-and-middle forging section bar that diameter is large.Induction welding because of its welding monitoring process parameter comparatively simple, joint quality is relatively easy to control.At present, on market, disclose some for can be used for the welder of induction welding, but the automaticity of ubiquity induction welding device is low, the problem that welding efficiency is not high.In addition also less stable of the quality of welding point.
Summary of the invention
The first object of the present invention is to provide a kind of automation, section bar induction welding device that efficiency is high.
The second object of the present invention is to provide a kind of automation, section bar induction welding method that efficiency is high.
In order to reach above-mentioned the first object, technical scheme of the present invention is: a kind of section bar induction welding device, comprises induction welding device, PLC control system, hydraulic system, cooling system and induction heating power, induction welding device comprises first group of caliper body, second group of caliper body, central shaft, clamping cylinder, upset oil cylinder and jaw, wherein first group of caliper body and second group of caliper body are jointly hinged on central shaft and form two pairs of pincerlike clamping devices, clamping cylinder are all housed to drive first group of caliper body between the caliper body of every pair of pincerlike clamping device, second group of caliper body rotated around central shaft respectively, first group of caliper body with second group of caliper body all by being connected with upset oil cylinder the relative motion realizing along center shaft axis direction, the bottom of described first group of caliper body and second group of caliper body is equipped with jaw, between described first group of caliper body and second group of caliper body, is also provided with a left side, right installing plate, a described left side, right installing plate is hinged on central shaft by the first through hole respectively, and left, right installing plate is slidably matched and is nested with on corresponding upset cylinder piston rod by the second through hole respectively, on described left and right installing plate, corresponding positional cylinder is all housed, described induction welding device also comprises the load coil of open-close type, the load coil of described open-close type comprises two subcoils, two subcoils respectively with corresponding positional cylinder load, two subcoils have the cavity adapting with section bar to be welded cross section after closing up, on one of described left and right installing plate, be fixed with electrode structure, electrode structure comprises first, second electrode, and when two subcoils close up, described first, second electrode contacts with the top of two subcoils respectively, and the bottom of two subcoils contacts with each other, form galvanic circle, an auxiliary cylinder is all housed in each caliper body of described second group of caliper body, the piston rod of two auxiliary cylinders respectively with corresponding left and right installing plate load, the bottom of described central shaft is fitted with keeper, also include oil circuit allocation block, on described oil circuit allocation block, pressure sensor is housed, described central shaft is provided with displacement transducer, and described left installing plate or right installing plate are provided with temperature sensor, and displacement transducer, temperature sensor and pressure sensor are all electrically connected to PLC control system.
Described electrode structure is positioned at the first place, through hole below on one of left and right installing plate.
Described positional cylinder has four, and the upper and lower part of left and right installing plate is respectively equipped with one.
The piston rod of described two auxiliary cylinders is by guiding slide bar and corresponding left and right installing plate load, and guiding slide bar and second group of caliper body are slidably matched.
On described left and right installing plate, be sliding combined with respectively guide plate, guide plate is fixed with the piston rod of corresponding positional cylinder, and two subcoils are installed in respectively on corresponding guide plate.
On described central shaft, be also set with two lifting axle sleeves, described two lifting axle sleeves lay respectively between the caliper body of every pair of pincerlike clamping device, and a clip is also equipped with respectively at the two ends of described central shaft; On described lifting axle sleeve and clip, be all fitted with keeper.
The first electrode of described electrode structure and the second electrode connect respectively the output of induction heating power, and conducting copper is intersected and is fixed between the first electrode and the second electrode by heat resistance insulating sheet; There is the first, the 5th coil contact the upper end of a subcoil in two subcoils of load coil, there is the second, the 6th coil contact bottom, there is the 4th, the 8th coil contact the upper end of another subcoil, and there is the 3rd, the 7th coil contact bottom.
The first electrode of described electrode structure and the second electrode connect respectively the output of induction heating power, between the first electrode and the second electrode, heat resistance insulating sheet are housed; There is respectively first, second coil contact in the upper and lower end portion of a subcoil in two subcoils of load coil, and the upper and lower end portion of another subcoil has respectively the 4th, tertiary coil contact.
In order to reach above-mentioned the second object, technical scheme of the present invention is: a kind of section bar induction welding method that adopts said apparatus, comprises the following steps:
A, the keeper by two section bars to be welded by the central shaft bottom load of induction welding device are realized location; By PLC control system, control induction welding device, hydraulic system, cooling system and induction heating power and carry out follow-up action;
Two clamping cylinders on b, induction welding device drive two groups of caliper body around central shaft, to rotate respectively, and the jaw of two groups of caliper body bottoms is clamped two section bars to be welded centering respectively;
Upset oil cylinder on c, induction welding device applies initial upset force the end face of two section bar joints to be welded is adjacent to, the load coil of open-close type moves to the joint of two section bars to be welded by auxiliary cylinder, positional cylinder is pushed two subcoils of load coil to section bar to be welded, and the joint bag of two section bars to be welded is held together, first, second electrode contact of the electrode structure of load is gone up respectively on the top of two subcoils with one of left and right installing plate, and the bottom of two subcoils contacts with each other, form galvanic circle;
D, PLC control system start induction heating power load coil are switched on, and load coil obtains after electric the joint of section bar to be welded is heated; PLC control system Controlled cooling system carries out cooling to load coil;
E, when by the time load coil is heated to predetermined welding temperature by the joint temperature of two section bars to be welded, PLC control system is closed induction heating power, positional cylinder separates by two subcoils of load coil, upset oil cylinder is carried out the instruction of PLC control system, the joint of section bar to be welded is applied in heating process always to the upset force of setting, thereby the end face of two section bars to be welded is welded together, auxiliary cylinder is return initial bit by load coil, returns a side of second group of caliper body;
F, clamping cylinder drive two groups of caliper body that jaw is opened, and unclamp section bar, thereby complete the induction welding of section bar.
In c step: two subcoils of load coil are installed in respectively on hinged left and right installing plate by corresponding positional cylinder, auxiliary cylinder drives left and right installing plate to move along center shaft axis direction, caliper body, when central shaft rotates, can drive left and right installing plate to rotate around central shaft.
In e step: adopt the temperature sensor of installing on induction welding device to measure the temperature of section bar to be welded, measurement data is delivered to PLC control system.
Described cooling system adopts water to carry out cooling to load coil.
In described e step, described predetermined welding temperature is 850 ℃～1430 ℃.
Adopt after said structure and method, the present invention has following beneficial effect:
The present invention adopts PLC to control, in ingehious design by positional cylinder, auxiliary cylinder, left and right installing plate and load coil in induction welding device and induction welding device, the parts such as clamping cylinder, upset oil cylinder cooperatively interacts, clamping, induction welding and the upset of section bar induction welding process have been realized, automaticity is high, reduce human factor impact, reduced labor operation intensity; The temperature, pressure and the displacement data that utilize temperature, pressure and displacement transducer collection to return, make PLC control whole welding process, and technological parameter is simple, be easy to debugging, and not affected by the factors such as mother metal, machine condition, environment, quality of weld joint is stable, can improve stability of the welding quality; Induction butt welding is different from melting, without adding packing material and protective gas, greatly reduces welding cost.The present invention is widely used in the welding of various section bars (such as I-steel, rail, steel pipe etc.).And the present invention also can heat-treat the heat treated section bar welding point of needs after welding, be equivalent to can realize welding and two functions of heat treatment in same equipment, can greatly improve welding and heat treatment efficiency, minimizing equipment investment.
Accompanying drawing explanation
The present invention is further detailed explanation for the embodiment providing below in conjunction with accompanying drawing.
Fig. 1 is the structural principle block diagram of section bar induction welding device of the present invention;
Fig. 2 is schematic side view of the present invention;
Fig. 3 is main TV structure schematic diagram of the present invention, the i.e. left view of Fig. 2;
Fig. 4 is the cutaway view along A-A line (being rotated counterclockwise after 90 °) of Fig. 2;
Fig. 5 is the syndeton schematic diagram of left and right installing plate in the present invention, load coil, positional cylinder;
Fig. 6 is the top view of Fig. 5;
Fig. 7, the 8th, the folding moving structure schematic perspective view of the load coil in the present invention;
The top view of two subcoils section bar cephalad direction separately time when Fig. 9 is two circles loop;
The upward view of two subcoils section bar bottom direction separately time when Figure 10 is two circles loop;
When Figure 11 is single turn loop, two subcoils are separately time
section barthe top view of cephalad direction;
When Figure 12 is single turn loop, two subcoils are separately time
section barthe upward view of bottom direction.
The specific embodiment
As Fig. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, shown in 12, a kind of section bar induction welding device of the present invention, comprises induction welding device 1, PLC control system, hydraulic system, cooling system and induction heating power, induction welding device 1 comprises first group of caliper body 10, second group of caliper body 6, central shaft 12, clamping cylinder 3, upset oil cylinder 7 and jaw 11, wherein first group of caliper body 10 and second group of caliper body 6 are jointly hinged on central shaft 12 and form two pairs of pincerlike clamping devices, clamping cylinder 3 are all housed to drive first group of caliper body 10 between the caliper body of every pair of pincerlike clamping device, second group of caliper body 6 rotated around central shaft 12 respectively, first group of caliper body 10 with second group of caliper body 6 all by being connected with upset oil cylinder 7 relative motion realizing along central shaft 12 axis directions, the bottom of described first group of caliper body 10 and second group of caliper body 6 is equipped with jaw 11, between described first group of caliper body 10 and second group of caliper body 6, is also provided with a left side, right installing plate 13, 14, a described left side, right installing plate 13, 14 respectively by the first through hole 13-1, 14-1 is hinged on central shaft 12, and left, right installing plate 13, 14 respectively by the second through hole 13-2, 14-2 is slidably matched and is nested with on corresponding upset cylinder piston rod 7-1, on described left and right installing plate 13,14, corresponding positional cylinder 15 is all housed, described induction welding device 1 also comprises the load coil 8 of open-close type, the load coil 8 of described open-close type comprises two subcoil 8-a, 8-b, two subcoil 8-a, 8-b respectively with corresponding positional cylinder 15 loads, two subcoil 8-a, 8-b have the cavity adapting with section bar to be welded 20 cross sections after closing up, on one of described left and right installing plate 13,14, be fixed with electrode structure 19, electrode structure 19 comprises first, second electrode 19-1,19-2, when two subcoil 8-a, 8-b close up, described first, second electrode 19-1,19-2 contact with the top of two subcoil 8-a, 8-b respectively, and the bottom of two subcoil 8-a, 8-b contacts with each other, form galvanic circle, the piston rod that 9, two auxiliary cylinders 9 of an auxiliary cylinder are all housed in each caliper body of described second group of caliper body 6 respectively with corresponding left and right installing plate 13,14 loads, the bottom of described central shaft 12 is fitted with keeper 21, also include oil circuit allocation block 5, on described oil circuit allocation block 5, pressure sensor 25 is housed, described central shaft 12 is provided with displacement transducer 12-1, described left installing plate 13 or right installing plate 14 are provided with temperature sensor 4, and displacement transducer 12-1, temperature sensor 4 and pressure sensor 25 are all electrically connected to PLC control system.
Because left and right installing plate 13,14 is hinged on central shaft 12, and be slidably matched and be nested with on corresponding upset cylinder piston rod 7-1, and corresponding positional cylinder 15 and auxiliary cylinder 9 are housed; Two subcoil 8-a, 8-b of load coil 8 respectively with corresponding positional cylinder 15 loads, therefore, load coil 8 can move to the joint of two section bars rapidly, exactly, section bar is heated, thereby can further improve speed of welding and the efficiency of section bar.
Hydraulic system can be comprised of hydraulic pump, hydraulic control valve, fluid pressure line etc.
Cooling system, as adopted water as cooling medium, can be comprised of water pump, valve, cooling line etc.Certainly, cooling system also can as required, adopt other cooling medium beyond dewatering.Keeper 21 is generally for being pressed in the block part at section bar to be welded top.
Preferably, on described central shaft 12, be also set with two lifting axle sleeves 23, described two lifting axle sleeves 23 lay respectively between the caliper body of every pair of pincerlike clamping device, and a clip 24 is also equipped with respectively at the two ends of described central shaft 12; On described lifting axle sleeve 23 and clip 24, be all fitted with keeper 21.This is because when carrying out section bar 20 welding, not only need to fix two section bars 20, but also to guarantee 20 alignment of two section bars, that just need to carry out accurately location centering to two section bars 20, and therefore the effect of 4 keepers 21 is under the cooperation with jaw 11, to guarantee that two section bars 20 locate and centering more accurately, more accurately and more quickly.Wherein 4 keepers 21 are one group between two, every group of keeper 21 section bars 20 in location, adopted the principle of 2 definite straight lines, thereby, under the clamping of jaw 11 coordinates, can realize two section bars 20 are carried out fast and accurate location centering, simultaneously because 4 keepers 21 can guarantee the centering location that section bar 20 is quicker accurate, induction welding device 1 directly falls to putting on section bar 20, can guarantee 20 alignment of two section bars, does not need to do other adjustment again.
As shown in Figure 5,6, described electrode structure 19 is positioned at the place, the first through hole 13-1,14-1 below on one of left and right installing plate 13,14.
As shown in Fig. 5,6,7,8, described positional cylinder 15 has four, and the upper and lower part of left and right installing plate 13,14 is respectively equipped with one.Like this, more steady when two subcoil 8-a, 8-b move, position is more accurate.
As shown in Fig. 4,7,8, the piston rod of described two auxiliary cylinders 9 is by guiding slide bar 18 and corresponding left and right installing plate 13,14 loads, and guiding slide bar 18 and second group of caliper body 6 are slidably matched.Like this, more steady when left and right installing plate 13,14 moves, position is more accurate.
As shown in Fig. 5,6,7,8, on described left and right installing plate 13,14, be sliding combined with respectively guide plate 17, guide plate 17 is fixed with the piston rod of corresponding positional cylinder 15, and two subcoil 8-a, 8-b are installed in respectively on corresponding guide plate 17.Like this, guaranteed when two subcoil 8-a, 8-b close up more accurate, not yielding.
As shown in Fig. 9,10; when load coil 8 adopts two circles loop; electrode structure 19 is: described the first electrode 19-1 and the second electrode 19-2 connect respectively the output of induction heating power, and conducting copper 22 is intersected and is fixed between the first electrode 19-1 and the second electrode 19-2 by heat resistance insulating sheet 27; The structure of load coil 8 is: there are the first, the 5th coil contact 8-1,8-5 in the upper end of a subcoil 8-a in two subcoil 8-a, 8-b, there are the second, the 6th coil contact 8-2,8-6 in bottom, there are the 4th, the 8th coil contact 8-4,8-8 in the upper end of another subcoil 8-b, and there are the 3rd, the 7th coil contact 8-3,8-7 in bottom.Certainly,
conduction copper bar 22 is preferably zigzag, can be also other shapes such as step.
When two subcoil 8-a, 8-b close up, the top first of load coil 8, the 4th, the 5th, the 8th coil contact 8-1,8-4,8-5,8-8 contact with the first contact 22-1, the second contact 22-2 and the second electrode 19-2 of the first electrode 19-1, conducting copper 22 respectively; The bottom second of load coil 8, the 6th coil contact 8-2,8-6 contact with the 3rd, the 7th coil contact 8-3,8-7 respectively, form thus two circles loop.
The first electrode 19-1 of take connects induced-current and is output as positive direction as example, induced-current flows to: induced-current flows into from electrode 19-1, through the first contact 22-1 of the first coil contact 8-1, the second coil contact 8-2, tertiary coil contact 8-3, the 4th electrode contacts 8-4, conducting copper 22 and the second contact 22-2, the 5th coil contact 8-5, the 6th coil contact 8-6, the 7th coil contact 8-7, the 8th coil contact 8-8, last electric current flows out from the second electrode 19-2, forms thus two circles loop.
As shown in Figure 11,12, during single turn loop, electrode structure 19 is: described the first electrode 19-1 and the second electrode 19-2 connect respectively the output of induction heating power, between the first electrode 19-1 and the second electrode 19-2, heat resistance insulating sheet 27 is housed; The structure of load coil 8 is: there are respectively first, second coil contact 8-1,8-2 in the upper and lower end portion of a subcoil 8-a in two subcoil 8-a, 8-b, has respectively the 4th, tertiary coil contact 8-4,8-3 in the upper and lower end portion of another subcoil 8-b.
When two subcoil 8-a, 8-b close up, the top first of load coil 8, the 4th coil contact 8-1,8-4 contact with first, second electrode 19-1,19-2 respectively; The bottom second coil contact 8-2 of load coil 8 contacts with tertiary coil contact 8-3, forms thus single turn loop.
The first electrode 19-1 of take connects induced-current and is output as positive direction as example, induced-current flows to: induced-current flows into from the first electrode 19-1, through the first coil contact 8-1, the second coil contact 8-2, tertiary coil contact 8-3, the 4th coil contact 8-4, last electric current, from the second electrode 19-2, flow out, form thus single turn loop.
As shown in Fig. 1,2,3,4,5,6,7,8,9,10,11,12, a kind of section bar induction welding method that adopts said apparatus of the present invention, comprises the following steps:
A, the keeper by two section bars 20 to be welded by the central shaft 12 bottom loads of induction welding device 1 21 are realized location; By PLC control system, control induction welding device 1, hydraulic system, cooling system and induction heating power and carry out follow-up action;
Two clamping cylinders 3 on b, induction welding device 1 drive two groups of caliper body 10,6 around central shaft 12, to rotate respectively, and the jaw 11 of two groups of caliper body 10,6 bottoms is clamped two section bars 20 to be welded centering respectively;
C, upset oil cylinder 7 on induction welding device 1 applies initial upset force the end face of two section bar 20 joints to be welded is adjacent to, the load coil 8 of open-close type moves to the joint of two section bars 20 to be welded by auxiliary cylinder 9, positional cylinder 15 is by two subcoil 8-a of load coil 8, 8-b pushes section bar 20 to be welded to, and the joint bag of two section bars 20 to be welded is held together, two subcoil 8-a, the top of 8-b respectively with a left side, right installing plate 13, first of the electrode structure 19 of one of 14 upper loads, the second electrode 19-1, 19-2 contact, and two subcoil 8-a, the bottom of 8-b contacts with each other, form galvanic circle,
D, PLC control system start induction heating power to load coil 8 energisings, load coil 8 the joint of section bar 20 to be welded is heated after electric; PLC control system Controlled cooling system carries out water cooling to load coil 8;
E, when by the time load coil 8 is heated to predetermined welding temperature by the joint temperature of two section bars 20 to be welded, PLC control system is closed induction heating power, positional cylinder 15 allows two subcoil 8-a, 8-b of load coil 8 divide out, upset oil cylinder 7 is carried out the instruction of PLC control system, the joint of section bar 20 to be welded is applied in heating process always to the upset force of setting, thereby the end face of two section bars 20 to be welded is welded together, auxiliary cylinder 9 is return initial bit by load coil 8, returns a side of second group of caliper body 6;
F, clamping cylinder 3 drive two groups of caliper body 10,6 that jaw 11 is opened, and unclamp section bar 20, thereby complete the induction welding of section bar.
In c step: two subcoil 8-a, 8-b of load coil 8 are installed in respectively on hinged left and right installing plate 13,14 by corresponding positional cylinder 15, auxiliary cylinder 9 drives left and right installing plate 13,14 to move along central shaft 12 axis directions, caliper body, when central shaft 12 rotates, can drive left and right installing plate 13,14 to rotate around central shaft 12.
In e step: adopt the temperature of 4 pairs of section bars 20 to be welded of temperature sensor of installing on induction welding device 1 to measure, measurement data is delivered to PLC control system.
Described cooling system adopts water to carry out cooling to load coil 8.Certainly, also can adopt other cooling medium to carry out cooling.
In described e step, described predetermined welding temperature is 850 ℃～1430 ℃.
As shown in Figure 1, 2, 3, section bar induction welding device of the present invention has adopted the induction welding technology of Automatic Control.Induction welding device 1 is as the equipment of whole equipment, directly completes the various actions such as clamping position to sectional material joint, induction welding, upset.
PLC control system is the control centre of whole equipment, except controlling induction welding device 1, complete above-mentioned various actions, guarantee that induction welding device 1 completes the automatic welding of section bar and realizes outside the feedback of Control Welding Process, but also control hydraulic system, cooling system, induction heating power, carry out follow-up action.Cooling system adopts external water circulation in welding process, makes water pass through load coil 8 hollow copper cores, avoids load coil 8 to produce superheating phenomenon.Displacement transducer, pressure sensor gather respectively various displacements and the pressure data in section bar welding process and calculate rear feedback output by PLC control system, thereby realize the various actions of induction welding device 1.Temperature sensor 4 gathers the real time temperature of section bar joints, feeds back to PLC control system after reaching design temperature, thereby closes or start induction heating power.
As shown in Fig. 1,2,3,4,5,6,7,8,9,10,11,12, the course of work of section bar induction welding device of the present invention is as follows:
When the present invention uses, first induction heating power is accessed to interchange out-put supply or the enough electric network sources of capacity that power source is also diesel generating set, then by clamping cylinder 3, two section bars 20 to be welded are clamped and automatic centering, upset oil cylinder 7 applies initial upset force the welding end surface of two section bars 20 to be welded is adjacent to, auxiliary cylinder 9 is pushed into the load coil of open-close type 8 joint of two section bars 20 to be welded, the closure that positional cylinder 15 is realized load coil 8 clamps, and whole load coil 8 wraps the welding point of two section bars 20 to be welded hold together completely.PLC control system starts induction heating power, to load coil 8 energisings, thereby the joint to two section bars 20 to be welded heats, Controlled cooling system carries out water cooling to load coil 8 simultaneously, controls the action of hydraulic system retaining clip locking oil cylinder 3 and upset oil cylinder 7.Treat that load coil 8 is heated to predetermined welding temperature by the connector temperature of two section bars 20 to be welded, PLC control system is closed induction heating power, controlling positional cylinder 15 opens two subcoil 8-a, 8-b of load coil 8 fast, and order upset oil cylinder 7 to apply setting upset force, the end face of two section bars 20 combines, and auxiliary cylinder 9 is return initial bit by load coil 8.In whole welding process, two section bars 20 to be welded remain fixing, and two end faces to be welded weld together, and reach the object of welding by the diffusion between metallic atom.
Claims (13)
1. a section bar induction welding device, comprises induction welding device (1), PLC control system, hydraulic system, cooling system and induction heating power, it is characterized in that:
A, induction welding device (1) comprises first group of caliper body (10), second group of caliper body (6), central shaft (12), clamping cylinder (3), upset oil cylinder (7) and jaw (11), wherein first group of caliper body (10) and second group of caliper body (6) are hinged on two pairs of pincerlike clamping devices of the upper formation of central shaft (12) jointly, clamping cylinder (3) is all housed to drive first group of caliper body (10) between the caliper body of every pair of pincerlike clamping device, second group of caliper body (6) rotated around central shaft (12) respectively, first group of caliper body (10) with second group of caliper body (6) all by being connected with upset oil cylinder (7) relative motion realizing along central shaft (12) axis direction, the bottom of described first group of caliper body (10) and second group of caliper body (6) is equipped with jaw (11), it is characterized in that:
Between b, described first group of caliper body (10) and second group of caliper body (6), be also provided with left and right installing plate (13,14), it is upper that described left and right installing plate (13,14) is hinged on central shaft (12) by the first through hole (13-1,14-1) respectively, and left and right installing plate (13,14) is slidably matched and is nested with on corresponding upset cylinder piston rod (7-1) by the second through hole (13-2,14-2) respectively;
C, described left and right installing plate are all equipped with corresponding positional cylinder (15) on (13,14);
D, described induction welding device (1) also comprise the load coil (8) of open-close type, the load coil of described open-close type (8) comprises two subcoils (8-a, 8-b), two subcoils (8-a, 8-b) respectively with corresponding positional cylinder (15) load, two subcoils (8-a, 8-b) have the cavity adapting with section bar to be welded (20) cross section after closing up;
On one of e, described left and right installing plate (13,14), be fixed with electrode structure (19), electrode structure (19) comprises first, second electrode (19-1,19-2), when two subcoils (8-a, 8-b) close up, described first, second electrode (19-1,19-2) contacts with the top of two subcoils (8-a, 8-b) respectively, and the bottom of two subcoils (8-a, 8-b) contacts with each other, form galvanic circle;
An auxiliary cylinder (9) is all housed in each caliper body of f, described second group of caliper body (6), the piston rod of two auxiliary cylinders (9) respectively with corresponding left and right installing plate (13,14) load;
The bottom of g, described central shaft (12) is fitted with keeper (21);
H, also include oil circuit allocation block (5), pressure sensor (25) is housed on described oil circuit allocation block (5), described central shaft (12) is provided with displacement transducer (12-1), described left installing plate (13) or right installing plate (14) are provided with temperature sensor (4), and displacement transducer (12-1), temperature sensor (4) and pressure sensor (25) are all electrically connected to PLC control system.
2. section bar induction welding device according to claim 1, is characterized in that: described electrode structure (19) is positioned at the place, the first through hole (13-1,14-1) below on one of left and right installing plate (13,14).
3. section bar induction welding device according to claim 1, is characterized in that: described positional cylinder (15) has four, and the upper and lower part of left and right installing plate (13,14) is respectively equipped with one.
4. section bar induction welding device according to claim 1, it is characterized in that: the piston rod of described two auxiliary cylinders (9) is by guiding slide bar (18) and corresponding left and right installing plate (13,14) load, and guiding slide bar (18) is slidably matched with second group of caliper body (6).
5. section bar induction welding device according to claim 1, it is characterized in that: described left and right installing plate is sliding combined with respectively guide plate (17) on (13,14), guide plate (17) is fixed with the piston rod of corresponding positional cylinder (15), and two subcoils (8-a, 8-b) are installed in respectively on corresponding guide plate (17).
6. section bar induction welding device according to claim 1, it is characterized in that: on described central shaft (12), be also set with two lifting axle sleeves (23), described two lifting axle sleeves (23) lay respectively between the caliper body of every pair of pincerlike clamping device, and a clip (24) is also equipped with respectively at the two ends of described central shaft (12); On described lifting axle sleeve (23) and clip (24), be all fitted with keeper (21).
7. section bar induction welding device according to claim 1; it is characterized in that: first electrode (19-1) of described electrode structure (19) and the second electrode (19-2) connect respectively the output of induction heating power, conducting copper (22) is intersected and is fixed between the first electrode (19-1) and the second electrode (19-2) by heat resistance insulating sheet (27); There is the first, the 5th coil contact (8-1,8-5) upper end of the subcoil (8-a) in two subcoils (8-a, 8-b) of load coil (8), there is the second, the 6th coil contact (8-2,8-6) bottom, there is the 4th, the 8th coil contact (8-4,8-8) upper end of another subcoil (8-b), and there is the 3rd, the 7th coil contact (8-3,8-7) bottom.
8. section bar induction welding device according to claim 1; it is characterized in that: first electrode (19-1) of described electrode structure (19) and the second electrode (19-2) connect respectively the output of induction heating power, between the first electrode (19-1) and the second electrode (19-2), heat resistance insulating sheet (27) is housed; There is respectively first, second coil contact (8-1,8-2) in the upper and lower end portion of the subcoil (8-a) in two subcoils (8-a, 8-b) of load coil (8), and the upper and lower end portion of another subcoil (8-b) has respectively the 4th, tertiary coil contact (8-4,8-3).
9. adopt a section bar induction welding method for one of claim 1 ~ 8 described device, it is characterized in that: comprise the following steps:
A, the keeper (21) by two section bars to be welded (20) by central shaft (12) the bottom load of induction welding device (1) are realized location; By PLC control system, control induction welding device (1), hydraulic system, cooling system and induction heating power and carry out follow-up action;
Two clamping cylinders (3) on b, induction welding device (1) drive two groups of caliper body (10,6) around central shaft (12), to rotate respectively, and the jaw (11) of two groups of caliper body (10,6) bottom is clamped two section bars to be welded (20) centering respectively;
C, upset oil cylinder (7) on induction welding device (1) applies initial upset force the end face of two section bars to be welded (20) joint is adjacent to, the load coil of open-close type (8) moves to the joint of two section bars to be welded (20) by auxiliary cylinder (9), positional cylinder (15) is by two subcoil (8-a of load coil (8), 8-b) push section bar to be welded (20) to, and the joint bag of two section bars to be welded (20) is held together, two subcoil (8-a, top 8-b) respectively with a left side, right installing plate (13, 14) one of first of the electrode structure (19) of upper load, the second electrode (19-1, 19-2) contact, and two subcoil (8-a, bottom 8-b) contacts with each other, form galvanic circle,
D, PLC control system start induction heating power to load coil (8) energising, load coil (8) the joint of section bar to be welded (20) is heated after electric; PLC control system Controlled cooling system carries out cooling to load coil (8);
E, when load coil (8) is heated to predetermined welding temperature by the joint temperature of two section bars to be welded (20) by the time, PLC control system is closed induction heating power, positional cylinder (15) allows two subcoil (8-a of load coil (8), 8-b) separately, upset oil cylinder (7) is carried out the instruction of PLC control system, the joint of section bar to be welded (20) is applied to the upset force of setting in heating process always, thereby the end face of two section bars to be welded (20) is welded together, auxiliary cylinder (9) is return initial bit by load coil (8), return a side of second group of caliper body (6),
F, clamping cylinder (3) drive two groups of caliper body (10,6) that jaw (11) is opened, and unclamp section bar (20), thereby complete the induction welding of section bar.
10. section bar induction welding method according to claim 9, it is characterized in that: in c step: two subcoils (8-a, 8-b) of load coil (8) are installed in respectively on hinged left and right installing plate (13,14) by corresponding positional cylinder (15), auxiliary cylinder (9) drives left and right installing plate (13,14) to move along central shaft (12) axis direction, caliper body, when central shaft (12) rotates, can drive left and right installing plate (13,14) to rotate around central shaft (12).
11. section bar induction welding methods according to claim 9, it is characterized in that: in e step: adopt the upper temperature sensor (4) of installing of induction welding device (1) to measure the temperature of section bar to be welded (20) joint, measurement data is delivered to PLC control system.
12. section bar induction welding methods according to claim 9, is characterized in that: described cooling system adopts water to carry out cooling to load coil (8).
13. section bar induction welding methods according to claim 9, is characterized in that: in described e step, described predetermined welding temperature is 850 ℃～1430 ℃.
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