CN211759200U - Special laser-electric arc composite efficient welding clamp for thick plate high-strength steel - Google Patents
Special laser-electric arc composite efficient welding clamp for thick plate high-strength steel Download PDFInfo
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- CN211759200U CN211759200U CN201922365528.XU CN201922365528U CN211759200U CN 211759200 U CN211759200 U CN 211759200U CN 201922365528 U CN201922365528 U CN 201922365528U CN 211759200 U CN211759200 U CN 211759200U
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Abstract
The utility model provides a compound high-efficient welding special fixture of thick plate high-strength steel laser-electric arc, this anchor clamps include: a bottom plate (1) and a pressure plate (2); a bottom plate groove (1-1) is formed in the middle of the bottom plate (1), and the pressing plates (2) are arranged on two sides of the bottom plate groove (1-1); one end of the bottom plate groove (1-1) is provided with an air receiving port (6). Compared with other technologies, the utility model has the advantages of as follows: 1. by adopting the clamp, the position of the bolt can be adjusted to adapt to workpieces to be welded with different models and sizes; 2. the whole base is protected by the copper gasket, and when the copper gasket needs to be replaced, so that the base does not need to be replaced integrally; 3. the copper gasket is more convenient and faster to disassemble due to the arrangement of the ejector head.
Description
Technical Field
The utility model belongs to the technical field of the material processing, concretely relates to compound high-efficient welding method of thick plate high-strength steel laser-electric arc, the utility model discloses still relate to a welding jig of this method.
Background
With the development of industry, the application of thick plates in welding structures is increasingly widespread. At present, conventional welding methods (manual arc welding, submerged arc automatic welding, fuse gas shield welding, etc.) are often used for thick plate welding. Although the cost of the traditional welding method is relatively low, the defects of unfused, undercut, welding beading and the like are easily generated, the welding efficiency is low, and the traditional welding method can not meet the use requirement gradually along with the development of the world economic technology, so that a novel welding technology gradually appears.
In the face of these welding techniques, the structure of the existing welding fixture is not reasonable enough, the fixture cannot be adjusted in the face of materials of different models, in addition, after welding every time, the damage of welding residues to the fixture is large, and the fixture is frequently replaced.
SUMMERY OF THE UTILITY MODEL
Utility model purpose:
the utility model discloses a compound high-efficient welding method of thick plate high-strength steel laser-electric arc and welding jig thereof, its purpose is to solve the not enough of traditional welding method.
The technical scheme is as follows:
the utility model provides a compound high-efficient welding jig of thick plate high-strength steel laser-electric arc, this anchor clamps include: a bottom plate (1) and a pressure plate (2);
a bottom plate groove (1-1) is formed in the middle of the bottom plate (1), and the pressing plates (2) are arranged on two sides of the bottom plate groove (1-1); one end of the bottom plate groove (1-1) is provided with an air receiving port (6).
The bottom plate (1) is provided with a positioning pin hole (3).
The pressing plate (2) is provided with bolt holes (4) for bolts to pass through;
the position of the bottom plate (1) corresponding to the bolt hole (4) is provided with a positioning hole for screwing the bolt in and matching with the bolt thread.
The clamp also comprises a copper gasket (5) which is just placed in the bottom plate groove (1-1).
The copper gasket (5) is provided with a gas through hole (5-1).
The top of the side wall in the bottom plate groove (1-1) is provided with a boss (9), a copper gasket (5) is lapped on the boss, and the upper surface of the copper gasket (5) is flush with the upper surface of the bottom plate (1).
A slope surface (5-2) is arranged at the bottom of one end of the copper gasket (5), and a pin hole (1-2) corresponding to the slope surface (5-2) when in use is arranged on the side wall of the bottom plate groove (1-1);
the copper gasket is characterized in that a top head (10) capable of moving along the pin hole (1-2) is arranged in the pin hole (1-2), the rear end of the top head (10) is connected with a driving rod (11), the rear end of the driving rod (11) penetrates through a plug (15) of the pin hole (1-2) and then extends out of the pin hole (1-2), a handle (13) is arranged at the rear end of the driving rod (11), and when the copper gasket is used, the top head (10) extends to the slope surface (5-2) and jacks up the copper gasket (5) by pushing the handle (13).
The advantages and effects are as follows:
for solving the technical problem, the utility model discloses a technical scheme is that, welding jig includes: the bottom plate, the clamp plate, the locating pin, the bolt, the copper gasket connects the gas port, and the bottom plate has one, and the bottom plate passes through the locating pin to be fixed it on welded platform, and the clamp plate has two, fixes it on the panel upper surface by welding through bolt and packing ring, and the copper gasket has one, puts it in the groove of bottom plate. The fixture can be quickly and fixedly installed, and can accurately position the workpiece, the workpiece cannot deviate in the welding process, the protection effect of the back of the welding seam is better, and the quality of the welding seam can be higher.
Compared with other technologies, the utility model has the advantages of as follows:
1. by adopting the clamp, the position of the bolt can be adjusted to adapt to workpieces to be welded with different models and sizes;
2. the whole base is protected by the copper gasket, and when the copper gasket needs to be replaced, so that the base does not need to be replaced integrally;
3. the copper gasket is more convenient and faster to disassemble due to the arrangement of the ejector head.
Drawings
FIG. 1 is a schematic diagram of a groove of a thick plate high-strength steel laser-MAG hybrid welding
FIG. 2 is a schematic view of a heat source sequence of thick plate high strength steel laser-MAG hybrid welding, which is a side view of FIG. 1, and the A _ A direction in FIG. 2 is in the form of FIG. 1;
FIG. 3 is a photograph of the front weld forming of the thick-plate high-strength steel laser-MAG hybrid welding.
FIG. 4 is a photograph of a thick plate high strength steel laser-MAG hybrid welding back side weld formation.
FIG. 5 is a schematic view of a welding jig for thick-plate high-strength steel laser-MAG hybrid welding.
Fig. 6 is a schematic view of a copper shim.
FIG. 7 is a view showing a state where the pressing plate presses the welded plate material.
Fig. 8 is a partial cross-sectional view of a copper shim installation.
Fig. 9 is a schematic view showing the structure of the plug.
In fig. 1: h-base metal thickness, theta-groove angle, H-truncated edge height, and alpha-welding gun and horizontal plane included angle.
In fig. 5: 1-bottom plate, 2-clamp plate, 3-locating pin, 4-bolt, 5-copper gasket, 6-connect the gas port.
Detailed Description
A laser-electric arc composite efficient welding method for thick plate high-strength steel is characterized by comprising the following steps: the method comprises the following process steps:
a) groove machining: the thickness of the high-strength steel plate for the ship is 18mm, a welding groove form is adopted at a welding position to be in Y-shaped groove butt joint, a groove angle theta is 20-30 degrees, a truncated edge height h is 9-11mm, heat input can be reduced by reducing the groove angle and increasing the truncated edge height, and then production efficiency is improved.
b) Welding materials: welding wires with the diameter of 1.2mm are selected as welding filling materials (GHS50NS, ST-80CM and THQ-80) according to the characteristics of the marine high-strength steel, and the mechanical property of a welding joint is ensured.
c) Welding protective gas: in the laser-MAG composite welding process, the volume fraction of the adopted protective gas is (80-90)% Ar + (10-20)% CO2Mixed gas (both gases are pure Ar gas and pure CO which are commonly used at present2The existing finished product can be directly purchased, which is commonly used protective gas in the field and has no special part), and the back of the weldment is protected by pure argon;
d) the welding process comprises the following steps: when the laser-MAG composite welding process is adopted, the laser power is 9-10kW, the defocusing amount is (-2) -0mm, the distance between the optical fibers is 1-3mm, the welding current is 350A-400A, the inclination angle (alpha) of a welding gun and the horizontal plane is 25-45 degrees, and the welding speed is 1.2-1.5 m/min.
The method is applied to a thick plate marine high-strength steel which is an EH36 steel plate, and the plate thickness (H) is 18 mm; the joint is in a Y-shaped groove butt joint mode, the groove angle theta is 20-30 degrees, and the blunt edge height h is 9-11 mm; adopting a GHS50NS welding wire with phi being 1.2 mm; the welding method is laser-MAG composite welding, and the welding process is single-pass one-step forming.
The parameters of the laser-MAG composite welding single-pass forming welding process are 10kW of laser power, 400A of welding current, 1.5m/min of welding speed and 20L/min of gas flow (the volume fraction of welding protective gas is 80% Ar + 20% CO)2Mixed gas), the back protection is pure argon, and the flow of the argon gas is 15L/min. Under the conditions, the high-strength steel plate (EH36) for the ship with 18mm is melted through in one pass.
Compared with single laser self-fluxing welding, due to the addition of the electric arc, the cooling speed of a welding area is reduced, and the crack sensitivity of a welding joint is reduced; due to the coupling of the laser and the electric arc, the advantages of the two heat sources are fully utilized, namely the arc welding increases the margin of the assembly gap and the laser welding increases the penetration depth, so that the high-efficiency and high-quality laser-MAG composite welding is realized. Realizes the welding process of single-pass one-time single-side welding and double-side forming.
This anchor clamps include: a bottom plate (1) and a pressure plate (2);
the middle part of the bottom plate (1) is provided with a bottom plate groove (1-1), and the pressure plates (2) are arranged on two sides of the length direction (generally, the length direction of a welding line) of the bottom plate groove (1-1); one end of the bottom plate groove (1-1) is provided with an air receiving port (6).
The bottom plate (1) is provided with a positioning pin hole (3). (when in use, the bottom plate (1) is positioned on the welding platform by the positioning pin passing through the positioning pin hole (3)
The pressing plate (2) is provided with a plurality of bolt holes (4) for bolts to pass through (the bolts are inserted into different bolt holes to adapt to materials to be welded with different types and sizes);
the position of the bottom plate (1) corresponding to the bolt hole (4) is provided with a positioning hole for screwing the bolt in and matching with the bolt thread. (when in use, the bolt 7 passes through the bolt hole (4) and extends into the positioning hole, and the pressure is applied to the welded plate 8 through the lower pressing plate (2) to realize clamping)
The clamp also comprises a copper gasket (5) which is just placed in the bottom plate groove (1-1). The copper gasket (5) has a piece which is placed in a groove of the base plate (1) to prevent the base plate from being damaged. (the principle of preventing damage is that the welding residual substance directly falls on the copper gasket (5), and then the copper gasket (5) is directly replaced, otherwise, the whole bottom plate (1) is replaced)
The copper gasket (5) is provided with a gas through hole (5-1). The gas through holes (5-1) are uniformly arranged along the length direction of the copper gasket (5). (that is, the intervals between the gas through holes (6-1) are the same)
The top of the side wall in the bottom plate groove (1-1) is provided with a boss (9), the copper gasket (5) is lapped on the boss, and the upper surface of the copper gasket (5) is flush with the upper surface of the bottom plate (1) (as shown in figure 8).
A slope surface (5-2) is arranged at the bottom of one end of the copper gasket (5), and a pin hole (1-2) corresponding to the slope surface (5-2) when in use is arranged on the side wall of the bottom plate groove (1-1);
the copper gasket lifting device is characterized in that a top head (10) capable of moving along the pin hole (1-2) is arranged in the pin hole (1-2) (the front end of the top head (10) is an inclined plane adaptive to the inclination of the slope surface (5-2)), the rear end of the top head (10) is connected with a driving rod (11), the rear end of the driving rod (11) penetrates through a plug (15) of the pin hole (1-2) and then extends out of the pin hole (1-2), a handle (13) is arranged at the rear end of the driving rod (11), and when the copper gasket lifting device is used, the top head (10) extends to the slope surface (5-2) and then jacks up the copper gasket (5) by pushing the handle (13. When the copper gasket lifting device is used, as shown in fig. 9, the handle (13) is pushed leftwards, so that the ejector (10) extends below the slope surface (5-2), and the copper gasket (5) is gradually jacked up along with the handle (13) is gradually pushed leftwards, so that the copper gasket (5) is convenient to take down. At the moment, the return spring is compressed, after the copper gasket (5) is dismounted, the handle (13) is loosened, and the ejector (10) retracts into the pin hole (1-2) again under the action of the return spring.
The rear part of the driving rod (11) is also sleeved with a return spring (12), the front end of the return spring (12) is propped against the plug (15), and the rear end is propped against the handle (13). The bottom plate (1) is provided with one plate, the bottom plate (1) is fixed on the welding platform through the positioning pin (3), the pressing plate (2) is provided with two plates, and the pressure of the pressing plate is applied to the welded plate through the bolt (4).
After the clamp is used for clamping, welding can be carried out.
Example 1:
a laser-electric arc composite efficient welding method for thick plate high-strength steel is characterized by comprising the following steps: the method comprises the following process steps:
a) groove machining: the welding part adopts a welding groove form of Y-shaped groove butt joint, and the groove angle theta is 20 degrees;
b) welding materials: selecting a welding wire with the diameter of 1.2mm as a welding filling material;
c) welding protective gas: in the laser-MAG composite welding process, the volume fraction of the adopted protective gas is 80% Ar + 20% CO2Mixing the gas, and protecting the back of the weldment to be pure argon; (protective gas is a direct purchase of finished products known in the art)
d) The welding process comprises the following steps: when the laser-MAG composite welding process is adopted, the laser power is 10kW, the defocusing amount is 0mm, the light wire interval is 1mm, the welding current is 400A, the inclination angle (alpha) of a welding gun and the horizontal plane is 45 degrees, and the welding speed is 1.5 m/min. The gas flow is 20L/min, the back protection is pure argon, and the argon gas flow is 15L/min.
The method is applied to the high-strength steel for thick plate ships, wherein the thickness (H) of the EH36 steel plate is 18 mm; the height h of the truncated edge of the Y-shaped groove is 9 mm; adopting a GHS50NS welding wire with phi being 1.2 mm; the welding method is laser-MAG composite welding, and the welding process is single-pass one-step forming.
The laser-MAG composite welding seam is well formed and has no welding defects such as cracks and the like; the fracture position of the tensile test of the welding joint is in the area of the base material, the joint is bent by 180 degrees, no crack appears on the surface, and the requirement of service performance is met.
Example 2:
a laser-electric arc composite efficient welding method for thick plate high-strength steel is carried out according to the following process steps:
a) groove machining: the welding part adopts a welding groove form of Y-shaped groove butt joint, and the groove angle theta is equal to 30 degrees;
b) welding materials: selecting a welding wire with the diameter of 1.2mm as a welding filling material;
c) welding protective gas: in the laser-MAG composite welding process, the volume fraction of protective gas adopted is 90% Ar + 10% CO2Mixing the gas, and protecting the back of the weldment to be pure argon; (the protective gases are allDirect purchase of finished products known in the art
d) The welding process comprises the following steps: when the laser-MAG composite welding process is adopted, the laser power is 9kW, the defocusing amount is-2 mm, the light wire spacing is 3mm, the welding current is 400A, the inclination angle (alpha) of a welding gun and the horizontal plane is 25 degrees, and the welding speed is 1.2 m/min. The gas flow is 20L/min, the back protection is pure argon, and the argon gas flow is 15L/min.
The method is applied to the high-strength steel for thick plate ships, wherein the thickness (H) of the EH36 steel plate is 18 mm; the height h of the truncated edge of the Y-shaped groove is 11 mm; adopting a GHS50NS welding wire with phi being 1.2 mm; the welding method is laser-MAG composite welding, and the welding process is single-pass one-step forming.
The laser-MAG composite welding seam is well formed and has no welding defects such as cracks and the like; the fracture position of the tensile test of the welding joint is in the area of the base material, the joint is bent by 180 degrees, no crack appears on the surface, and the requirement of service performance is met.
Example 3:
a laser-electric arc composite efficient welding method for thick plate high-strength steel is carried out according to the following process steps:
a) groove machining: the welding part adopts a welding groove form of Y-shaped groove butt joint, and the groove angle theta is 25 degrees;
b) welding materials: selecting a welding wire with the diameter of 1.2mm as a welding filling material;
c) welding protective gas: in the laser-MAG composite welding process, the volume fraction of the adopted protective gas is 85% Ar + 15% CO2Mixing the gas, and protecting the back of the weldment to be pure argon; (protective gas is a direct purchase of finished products known in the art)
d) The welding process comprises the following steps: when the laser-MAG composite welding process is adopted, the laser power is 9kW, the defocusing amount is-1 mm, the light wire spacing is 2mm, the welding current is 350A, the inclination angle (alpha) of a welding gun and the horizontal plane is 30 degrees, and the welding speed is 1.3 m/min. The gas flow is 20L/min, the back protection is pure argon, and the argon gas flow is 15L/min.
The method is applied to the high-strength steel for thick plate ships, wherein the thickness (H) of the EH36 steel plate is 18 mm; the height h of the truncated edge of the Y-shaped groove is 11 mm; adopting a GHS50NS welding wire with phi being 1.2 mm; the welding method is laser-MAG composite welding, and the welding process is single-pass one-step forming.
The laser-MAG composite welding seam is well formed and has no welding defects such as cracks and the like; the fracture position of the tensile test of the welding joint is in the area of the base material, the joint is bent by 180 degrees, no crack appears on the surface, and the requirement of service performance is met.
Example 4:
a laser-electric arc composite efficient welding method for thick plate high-strength steel is carried out according to the following process steps:
a) groove machining: the welding part adopts a welding groove form of Y-shaped groove butt joint, and the groove angle theta is 28 degrees;
b) welding materials: selecting a welding wire with the diameter of 1mm as a welding filling material;
c) welding protective gas: in the laser-MAG composite welding process, the volume fraction of the adopted protective gas is 85% Ar + 15% CO2Mixing the gas, and protecting the back of the weldment to be pure argon; (protective gas is a direct purchase of finished products known in the art)
d) The welding process comprises the following steps: when the laser-MAG composite welding process is adopted, the laser power is 10kW, the defocusing amount is-1 mm, the light wire spacing is 2mm, the welding current is 350A, the inclination angle (alpha) of a welding gun and the horizontal plane is 30 degrees, and the welding speed is 1.3 m/min. The gas flow is 15L/min, the back protection is pure argon, and the argon gas flow is 20L/min.
The method is applied to the high-strength steel for thick plate ships, wherein the thickness (H) of the EH36 steel plate is 18 mm; the height h of the truncated edge of the Y-shaped groove is 10 mm; adopting a GHS50NS welding wire with phi being 1.0 mm; the welding method is laser-MAG composite welding, and the welding process is single-pass one-step forming.
The laser-MAG composite welding seam is well formed and has no welding defects such as cracks and the like; the fracture position of the tensile test of the welding joint is in the area of the base material, the joint is bent by 180 degrees, no crack appears on the surface, and the requirement of service performance is met.
Example 5:
a laser-electric arc composite efficient welding method for thick plate high-strength steel is carried out according to the following process steps:
a) groove machining: the welding part adopts a welding groove form of Y-shaped groove butt joint, and the groove angle theta is equal to 30 degrees;
b) welding materials: selecting a welding wire with the diameter of 1.3mm as a welding filling material;
c) welding protective gas: in the laser-MAG composite welding process, the volume fraction of the adopted protective gas is 85% Ar + 15% CO2Mixing the gas, and protecting the back of the weldment to be pure argon; (protective gas is a direct purchase of finished products known in the art)
d) The welding process comprises the following steps: when the laser-MAG composite welding process is adopted, the laser power is 10kW, the defocusing amount is-1 mm, the light wire spacing is 2mm, the welding current is 350A, the inclination angle (alpha) of a welding gun and the horizontal plane is 30 degrees, and the welding speed is 1.3 m/min. The gas flow is 25L/min, the back protection is pure argon, and the argon gas flow is 10L/min.
The method is applied to the high-strength steel for thick plate ships, wherein the thickness (H) of the EH36 steel plate is 18 mm; the height h of the truncated edge of the Y-shaped groove is 10 mm; adopting a GHS50NS welding wire with phi being 1.2 mm; the welding method is laser-MAG composite welding, and the welding process is single-pass one-step forming.
The laser-MAG composite welding seam is well formed and has no welding defects such as cracks and the like; the fracture position of the tensile test of the welding joint is in the area of the base material, the joint is bent by 180 degrees, no crack appears on the surface, and the requirement of service performance is met.
To sum up, the laser-MAG composite welding is carried out on the thick-plate high-strength steel EH36 steel plate with the thickness of 18mm by adopting the utility model; adopting GHS50NS welding wire and single-pass one-time fusion-through forming, and single-side welding and double-side forming; the laser-MAG composite welding process parameters are as follows: the laser-MAG composite welding seam is well formed and has no welding defects such as cracks and the like; the fracture position of the tensile test of the welding joint is in the area of the base material, the joint is bent by 180 degrees, no crack appears on the surface, and the requirement of service performance is met.
The laser-MAG composite welding is carried out on the EH36 steel plate with the thickness of 18mm by adopting the utility model; the specific implementation mode is as follows: fix the bottom plate on the welding table with the locating pin earlier, put the copper gasket in the groove of bottom plate, will be welded the work piece and put on the bottom plate again for the welding seam keeps the middle part in groove, reuse clamp plate presses on the work piece that is welded, compresses tightly the work piece that is welded with the clamp plate with the bolt, thereby can install fixedly fast, and can carry out accurate location to the work piece, in welding process, insert the back protection trachea and connect in the gas pocket 6 and ventilate, make gas flow through 5 gas pockets 5-1 of copper gasket, thereby guarantee that the air current is stable, the protection is even.
In conclusion, the laser-MAG hybrid welding is carried out by adopting a 10kW fiber laser and 400A welding current, and a 18mm high-strength steel plate is penetrated through in a single pass, so that the high-efficiency and high-quality laser-arc hybrid welding is realized.
Claims (7)
1. The utility model provides a compound high-efficient welding special fixture of thick plate high-strength steel laser-electric arc which characterized in that: this anchor clamps include: a bottom plate (1) and a pressure plate (2);
a bottom plate groove (1-1) is formed in the middle of the bottom plate (1), and the pressing plates (2) are arranged on two sides of the bottom plate groove (1-1); one end of the bottom plate groove (1-1) is provided with an air receiving port (6).
2. The special laser-arc hybrid efficient welding clamp for the thick plate high-strength steel according to claim 1, which is characterized in that: the bottom plate (1) is provided with a positioning pin hole (3).
3. The special laser-arc hybrid efficient welding clamp for the thick plate high-strength steel according to claim 1, which is characterized in that: the pressing plate (2) is provided with bolt holes (4) for bolts to pass through;
the position of the bottom plate (1) corresponding to the bolt hole (4) is provided with a positioning hole for screwing the bolt in and matching with the bolt thread.
4. The special laser-arc hybrid efficient welding clamp for the thick plate high-strength steel according to claim 1, which is characterized in that: the clamp also comprises a copper gasket (5) which is just placed in the bottom plate groove (1-1).
5. The special laser-arc hybrid efficient welding clamp for the thick plate high-strength steel according to claim 4, characterized in that: the copper gasket (5) is provided with a gas through hole (5-1).
6. The special laser-arc hybrid efficient welding clamp for the thick plate high-strength steel according to claim 4, characterized in that: the top of the side wall in the bottom plate groove (1-1) is provided with a boss (9), a copper gasket (5) is lapped on the boss, and the upper surface of the copper gasket (5) is flush with the upper surface of the bottom plate (1).
7. The special laser-arc hybrid efficient welding clamp for the thick plate high-strength steel according to claim 6, characterized in that: a slope surface (5-2) is arranged at the bottom of one end of the copper gasket (5), and a pin hole (1-2) corresponding to the slope surface (5-2) when in use is arranged on the side wall of the bottom plate groove (1-1);
the copper gasket is characterized in that a top head (10) capable of moving along the pin hole (1-2) is arranged in the pin hole (1-2), the rear end of the top head (10) is connected with a driving rod (11), the rear end of the driving rod (11) penetrates through a plug (15) of the pin hole (1-2) and then extends out of the pin hole (1-2), a handle (13) is arranged at the rear end of the driving rod (11), and when the copper gasket is used, the top head (10) extends to the slope surface (5-2) and jacks up the copper gasket (5) by pushing the handle (13).
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