CN115026389A - Welding method suitable for groove weld of shield beam bent cover plate of hydraulic support - Google Patents
Welding method suitable for groove weld of shield beam bent cover plate of hydraulic support Download PDFInfo
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- CN115026389A CN115026389A CN202210755786.2A CN202210755786A CN115026389A CN 115026389 A CN115026389 A CN 115026389A CN 202210755786 A CN202210755786 A CN 202210755786A CN 115026389 A CN115026389 A CN 115026389A
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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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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Abstract
The invention provides a welding method suitable for a groove weld of a bent cover plate of a shield beam of a hydraulic support, which comprises the following steps of: dividing a welding bead of the single V-shaped groove into at least one manual sliding seam welding bead, a robot backing welding bead, at least one layer of filling single welding bead, one layer of filling double welding bead and one layer of cover multi-welding bead from bottom to top in sequence, wherein the thickness of each welding bead in the horizontal section is approximately equal to that of each bending section; carrying out manual seam welding on the manual seam welding track; placing the shield beam on a robot welding platform to enable the horizontal section to be in a horizontal position, and continuously welding the backing weld bead of the robot by using a welding robot; filling welding is carried out on the filling welding bead by adopting a welding robot; and adopting a welding robot to perform facing welding on the facing welding bead. The welding method suitable for the bevel weld of the bent cover plate of the hydraulic support shield beam has the advantages of high welding efficiency, smooth transition of the bent part, high welding quality and good welding forming.
Description
Technical Field
The invention relates to a welding method for a hydraulic support structural part, in particular to a welding method suitable for a bevel weld of a bent cover plate of a shield beam of a hydraulic support.
Background
The shield beam body is an important component of the hydraulic support, and is collectively called as three major parts of the hydraulic support together with the top beam body and the base body. The shield beam is limited by the structural characteristics of the shield beam, the shield beam is a multi-box type medium-thickness plate high-strength steel welding structure, the cover plate at the upper part of a box body is mostly a bent cover plate, the common length of the bent cover plate of the shield beam is within the range of 2-4m, the plate thickness is generally 20mm or 25mm, 18-40-degree grooves or 23-40-degree grooves are designed on the periphery of the bent cover plate, the bent cover plate and surrounding main ribs or other parts form 18-40-degree or 23-40-degree single V-shaped groove welding seams, in order to guarantee the strength, the right-angle side in the single V-shaped groove is higher than the bevel side, and the welding seams are continuously raised and welded with 5mm angle welding seams after the grooves are filled up.
The bent cover plate of the shield beam is divided into a horizontal section and a non-horizontal section, and the included angle between the non-horizontal section and the horizontal section is generally 15-35 degrees. For the welding process of the traditional robot solid welding wire for gas shielded welding, when the gradient of a welding line exceeds 15 degrees, the phenomenon of flowing is easy to occur under the action of the metal gravity of a liquid molten pool of the welding line, so that the forming of the welding line and the improvement of the welding efficiency are seriously restricted. Particularly, for the shield beam composed of medium-thickness plate high-strength steel, the groove size is large, the strength of the base metal is high, the welding seam is complex, the welding quantity is large, and the requirement on welding heat input is strict.
The applicant provided a method for welding a climbing workpiece of a welding robot in a patent with application number 201810441649.5, which adopts crescent swing welding hydraulic support for climbing welding, has low efficiency and overlarge welding heat input, is limited by the number of layers of welding seams of climbing welding, cannot be unified with the number of layers of welding seams at a horizontal position, causes too many welding joints, and seriously affects the quality of the welding seams.
In order to solve the above problems, people are always seeking an ideal technical solution.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a welding method suitable for a bevel weld of a bent cover plate of a hydraulic support shield beam, which has the advantages of high welding efficiency, smooth transition of a bent part, high weld quality and good welding forming.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the welding method of the groove weld of the curved cover plate of the shield beam suitable for the hydraulic support comprises a horizontal section and a bent section, wherein an included angle between the bent section and the horizontal section is 145-165 degrees, two sides of the bent cover plate and a main rib of the shield beam form a single V-shaped groove, and the groove angle of the single V-shaped groove is 40 degrees, and the welding method comprises the following steps:
step S1, sequentially dividing the welding bead of the single V-shaped groove into at least one manual seam welding bead, a robot backing welding bead, at least one layer of filling single welding bead, one layer of filling double welding bead and one layer of cover multi-welding bead from bottom to top, wherein the thickness of each welding bead in the horizontal section is approximately equal to that of each bending section;
step S2, carrying out manual seam welding on the manual seam welding track;
s3, placing the shield beam on a robot welding platform to enable the horizontal section to be in a horizontal position, continuously welding the backing weld bead of the robot by adopting a welding robot, and adopting a solid welding wire of 1.6mm and Ar +20% CO during welding 2 The protective gas of (2):
welding a backing weld bead of the robot in the horizontal section, wherein the welding parameters are as follows: the welding current is 390-410A, the voltage is 30-32V, the wire feeding speed is 7-8m/min, the welding speed is 40-45cm/min, the swing form is sine swing, the swing amplitude is 3mm, and the swing frequency is 1.68 Hz;
and then carrying out uphill welding on the robot backing weld bead at the bending section, wherein the welding parameters are as follows: welding current 270-290A, voltage 29-31V, wire feeding speed 4-5m/min, welding speed 20-30cm/min, sine pendulum, pendulum amplitude 6mm, pendulum frequency 2.68Hz, 0.35s dwell time on two sides, and included angle between welding gun and welding bead is kept at 110-120 deg;
step S4, performing filling welding on the filling weld bead by adopting a welding robot, and during welding, adopting a solid welding wire of 1.6mm and Ar +20% CO 2 The shielding gas is continuously applied for each filling welding pass:
firstly, welding the filling welding bead in the horizontal section, wherein the welding parameters are as follows: the welding current is 460-500A, the voltage is 33-36V, the wire feeding speed is 10-12m/min, the welding speed is 55-70cm/min, the swing mode is sine swing, the swing amplitude is 3-5mm, and the swing frequency is 1.68 Hz;
and then carrying out uphill welding on the filling welding bead positioned in the bending section, wherein the welding parameters are as follows: the current is 300-320A, the voltage is 31-34V, the wire feeding speed is 4.5-5.5m/min, the welding speed is 20-30cm/min, the swinging mode is a sine pendulum, the swinging amplitude is 5-7mm, the swinging frequency is 2.68Hz, the residence time of 0.35s is respectively increased on two sides, and the included angle between a welding gun and the welding bead is kept between 110 degrees and 120 degrees;
step S5, adopting a welding robot to perform facing welding on the facing weld bead, and adopting a solid welding wire with the diameter of 1.6mm and Ar +20% CO when in welding 2 The shielding gas is continuously welded aiming at each cover surface welding bead, and the thickness of the cover surface welding bead is not more than 3 mm:
firstly, carrying out downhill welding on the cover surface welding bead at the bending section, wherein the welding parameters are as follows: the current is 300-320A, the voltage is 32-36V, the welding speed is 25-35cm/min, the wire feeding speed is 4.5-5.5m/min, the swinging mode is a sine pendulum, the swinging amplitude is 4-6mm, the swinging frequency is 2.08Hz, the residence time of 0.15s is respectively increased on two sides, and the included angle between a welding gun and the welding bead is kept between 110 and 120 degrees;
welding the cover surface welding bead in the horizontal section, wherein the welding parameters are as follows: the welding current is 450-480A, the voltage is 33-35V, the wire feeding speed is 9-11m/min, the welding speed is 55-70cm/min, the swing mode is sine swing, the swing amplitude is 4mm, and the swing frequency is 1.68 Hz.
Based on the above, when the depth of the single V-shaped groove is 18mm, a layer of filling single welding bead is arranged, a layer of filling double welding bead is arranged from the straight edge of the single V-shaped groove to the oblique edge, and two facing welding beads are arranged from the oblique edge of the single V-shaped groove to the straight edge; when the depth of the single V-shaped groove is 23mm, two layers of filling single welding beads are arranged, one layer of filling double welding beads are arranged from the straight edge of the single V-shaped groove to the oblique edge, three cover surface welding beads are arranged, and the three cover surface welding beads are arranged from the oblique edge of the single V-shaped groove to the straight edge.
Based on the above, in step S2, when performing manual seam welding, a solid wire with a diameter of 1.4mm and Ar +20% CO were used 2 The welding parameters of the mixed gas are as follows:
when the splicing gap of the single V-shaped groove is 0-2mm, a manual sliding seam welding bead is arranged, the welding current is 280-300A, the welding voltage is 29-31V, and the welding speed is 45-55 cm/min;
when the assembling clearance of the single V-shaped groove is larger than 2mm, two manual sliding welding beads are arranged, the two manual sliding welding beads are distributed from the straight edge to the inclined edge of the single V-shaped groove, for the first manual sliding welding bead, the welding current is 250-280A, the welding voltage is 26-28V, the welding speed is 45-55cm/min, and a welding gun points to the main rib and does not swing; aiming at the second manual seam welding pass, the welding current is 280-300A, the welding voltage is 28-30V, the welding speed is 50-55cm/min, the welding gun points to the center of the groove, the swing mode adopts elliptical swing, and the swing amplitude is 1-3 mm.
Based on the above, in steps S3-S5, the arc tracking function is turned on when the welding robot performs welding.
Based on the above, before step S2, the weld needs to be cleaned, impurities such as rust, oil stain, scum, etc. within a range of 20mm on both sides of the weld are removed, and an angle grinder is used to polish the surface of the weld bead until the metal luster appears.
Compared with the prior art, the invention has outstanding substantive characteristics and remarkable progress, and particularly has the following advantages:
(1) different welding parameters and welding methods are set for the horizontal section and the bending section of each welding bead, so that the welding parameters of the horizontal section and the bending section can be matched with each other, the thickness of each welding bead in the horizontal section and the thickness of each welding bead in the bending section are approximately equal, the welding seams can be smoothly transited at the bending positions and can be continuously welded, and the problems that the quantity of the welding beads of the horizontal section and the bending section cannot be unified and the number of welding joints in the traditional climbing welding is large are effectively solved; meanwhile, in the welding process of the welding robot, the solid welding wires of 1.6mm are adopted in each welding pass, the welding parameters of the horizontal section and the bending section can be matched with each other, meanwhile, the welding robot is well suitable for welding of the solid welding wires of 1.6mm, the problems that the welding heat is too large, the burning loss of alloy elements of the welding wires is serious, the welding defects are more, the toughness of welding seams is poor and the like which often occur in the welding process of the solid welding wires of 1.6mm in diameter are effectively solved, and the requirement of a shield beam structural part on the welding seams can be met, so that the welding deposition rate can reach 5kg/h, and compared with the deposition rate of 3kg/h of the traditional crescent swing, the welding efficiency can be improved by more than 60%;
(2) the welding robot adopts the uphill welding in backing welding and filling welding, the characteristic of large fusion depth of the uphill welding is effectively exerted, the first 1-2 layers of filling welding beads adopt single welding beads, the swing width is larger compared with the traditional double welding beads or multi-welding beads, two ends of the welding beads can be directly connected with two side walls of the single V-shaped groove, the forming is better, the last layer of filling welding beads adopts double welding beads, the fusion depth is larger, the fusion between the welding beads is better, and the proper welding parameters are matched, so that the full fusion between each welding bead can be ensured, and the welding bead can be better formed; the cover welding adopts downhill welding, the characteristics of good spreadability and good forming of the downhill welding pool are fully exerted, a wide and thin cover welding bead is obtained by matching appropriate welding parameters, and meanwhile, the thickness of backing welding and filling welding can be thicker, so that good appearance and overall welding strength are considered;
(3) the robot does not need to increase the retention time of two sides when backing up and welding the welding seams of the bending section, thereby ensuring the sensitivity and the accuracy of electric arc tracking and laying a good foundation for continuous and automatic welding of each welding seam;
(4) according to different assembling gaps, different welding bead quantities and different welding parameters are adopted for manual seam welding, the defects of the single V-shaped groove during assembling can be conveniently overcome through manual operation, and a foundation is laid for continuous welding of a follow-up welding robot.
Drawings
Fig. 1 is a side view of a curved cover plate of a shield beam according to the present invention.
Fig. 2 is a cross-sectional view of a box structure of a shield beam before a single V-groove is welded in the present invention.
FIG. 3 is a schematic view of the welding direction of the bending section welding seam in the robot backing welding and filling welding.
FIG. 4 is a schematic view of the welding direction of the bent section welding seam in the robot cover welding process.
FIG. 5 is a schematic diagram of the arrangement of weld beads in a single V-shaped groove with an assembly gap smaller than 2mm and a depth of 18 mm.
FIG. 6 is a schematic view showing arrangement of weld beads in a single V-shaped groove with an assembly gap of more than 2mm and a depth of 18 mm.
FIG. 7 is a schematic diagram of the arrangement of weld beads in a single V-shaped groove with an assembly gap smaller than 2mm and a depth of 23 mm.
FIG. 8 is a schematic diagram of the arrangement of weld beads in a single V-shaped groove with an assembly gap larger than 2mm and a depth of 23 mm.
In the figure: 1. bending the cover plate; 2. a main rib; 3. a single V-shaped slope; 4. a horizontal segment; 5. and (6) bending the section.
Detailed Description
The technical solution of the present invention is further described in detail by the following embodiments.
As shown in fig. 1 to 8, a welding method suitable for a bevel weld of a curved cover plate of a hydraulic support shield beam, where the curved cover plate 1 includes a horizontal section 4 and a bent section 5, an included angle between the bent section 5 and the horizontal section 4 is 145 ° to 165 °, two sides of the curved cover plate 1 and a main rib 2 of the shield beam form a single V-shaped bevel 3, and a bevel angle of the single V-shaped bevel 3 is 40 °, includes the following steps:
(1) dividing the welding bead of the single V-shaped groove 3 into at least one manual seam welding bead, one robot backing welding bead, at least one layer of filling single welding bead, one layer of filling double welding bead and one layer of cover multi-welding bead from bottom to top in sequence, wherein the thickness of each welding bead in the horizontal section 4 is approximately equal to that of the bending section 5;
as shown in fig. 5, when the depth of the single V-shaped groove 3 is 18mm and the splicing gap is less than 2mm, a total of 7 welding passes are provided, welding pass 1 is a manual seam welding pass, welding pass 2 is a backing welding pass of a robot, welding pass 3 is a filling single welding pass, welding passes 4-5 are filling double welding passes, welding passes 6-7 are cover welding passes, one layer of filling double welding passes is arranged from the straight edge of the single V-shaped groove 3 to the oblique edge, and two cover welding passes are arranged from the oblique edge of the single V-shaped groove 3 to the straight edge;
as shown in fig. 6, when the depth of the single V-shaped groove 3 is 18mm and the splicing gap is greater than 2mm, 8 welding beads are provided in total, the welding beads (1) and (2) are manual seam welding beads, welding bead 2 robot backing welding beads, welding bead 3 is a filling single welding bead, welding beads 4-5 are filling double welding beads, and welding beads 6-7 are capping welding beads, one layer of filling double welding beads are arranged from the straight edge of the single V-shaped groove 3 to the oblique edge, and two capping welding beads are arranged from the oblique edge of the single V-shaped groove 3 to the straight edge;
as shown in fig. 7, when the depth of the single V-shaped groove 3 is 23mm and the splicing gap is less than 2mm, 9 welding passes are provided, welding pass 1 is a manual seam welding pass, welding pass 2 is a backing welding pass of a robot, welding passes 3-4 are filling single welding passes, welding passes 5-6 are filling double welding passes, welding passes 7-9 are cover welding passes, one layer of filling double welding passes is arranged from the straight edge of the single V-shaped groove 3 to the oblique edge, and two cover welding passes are arranged from the oblique edge of the single V-shaped groove 3 to the straight edge;
and as shown in fig. 8, when the depth of the single V-shaped groove 3 is 23mm and the splicing gap is less than 2mm, 10 welding passes are arranged, the welding passes (1) and (2) are manual seam welding passes, the welding pass 2 is a backing welding pass of a robot, the welding pass 3-4 is a filling single welding pass, the welding pass 5-6 is a filling double welding pass, the welding pass 7-9 is a cover welding pass, one layer of the filling double welding pass is arranged from the straight edge of the single V-shaped groove 3 to the oblique edge, and the two cover welding passes are arranged from the oblique edge of the single V-shaped groove 3 to the straight edge.
(2) Cleaning the welding seam, removing impurities such as rust, oil stain, scum and the like within the range of 20mm at the two sides of the welding seam, and polishing the surface of the welding seam by adopting an angle grinder until the surface of the welding seam appears metallic luster.
(3) Carrying out manual seam welding on the manual seam welding track by adopting a solid welding wire with the diameter of 1.4mm and Ar +20% CO 2 The welding parameters of the mixed gas are as follows:
when the splicing gap of the single V-shaped groove 3 is 0-2mm, the welding current of the welding bead 1 is 280-300A, the welding voltage is 29-31V, and the welding speed is 45-55 cm/min;
when the assembling clearance of the single V-shaped groove 3 is more than 2mm, aiming at the welding bead (1), the welding current is 250-280A, the welding voltage is 26-28V, the welding speed is 45-55cm/min, and the welding gun points to the main rib and does not swing; aiming at the welding bead (2), the welding current is 280-300A, the welding voltage is 28-30V, the welding speed is 50-55cm/min, the welding gun points to the center of the groove, the swinging mode adopts an elliptical swing, and the swinging amplitude is 1-3 mm.
(4) Placing the shield beam on a robot welding platform to enable the horizontal section 4 to be in a horizontal position, continuously welding the backing weld bead of the robot by using a welding robot, starting an electric arc tracking function during welding, and adopting a solid welding wire of 1.6mm and Ar +20% CO 2 The protective gas of (2):
firstly, welding a backing weld bead of the robot in the horizontal section 4, wherein the welding parameters are as follows: the welding current is 390-410A, the voltage is 30-32V, the wire feeding speed is 7-8m/min, the welding speed is 40-45cm/min, the swing form is sine swing, the swing amplitude is 3mm, and the swing frequency is 1.68 Hz;
and then carrying out uphill welding on the robot backing weld bead at the bending section 5, wherein the welding parameters are as follows: welding current 270-290A, voltage 29-31V, wire feeding speed 4-5m/min, welding speed 20-30cm/min, swing form is sine swing, swing amplitude 6mm, swing frequency 2.68Hz, residence time of 0.35s is respectively increased on two sides, and included angle between the welding gun and the welding bead is kept between 110 degrees and 120 degrees.
(5) Filling welding is carried out on the filling welding bead by adopting a welding robot, when welding is carried out, an electric arc tracking function is started, and a welding bead with the diameter of 1.6mm is adoptedSolid wire and Ar +20% CO 2 The shielding gas is continuously applied for each filling welding pass:
firstly, welding the filling welding bead in the horizontal section 4, wherein the welding parameters are as follows: the welding current is 460-500A, the voltage is 33-36V, the wire feeding speed is 10-12m/min, the welding speed is 55-70cm/min, the swing mode is sine swing, the swing amplitude is 3-5mm, and the swing frequency is 1.68 Hz;
and then carrying out uphill welding on the filling welding bead positioned at the bending section 5, wherein the welding parameters are as follows: the current is 300-320A, the voltage is 31-34V, the wire feeding speed is 4.5-5.5m/min, the welding speed is 20-30cm/min, the swinging form is a sine pendulum, the swinging amplitude is 5-7mm, the swinging frequency is 2.68Hz, the residence time of 0.35s is respectively increased on the two sides, and the included angle between the welding gun and the welding bead is kept between 110 and 120 degrees.
(6) Adopting a welding robot to perform cover welding on the cover welding bead, starting an electric arc tracking function during welding, and adopting a solid welding wire of 1.6mm and Ar +20% CO 2 The shielding gas is continuously welded aiming at each capping welding bead, and the thickness of the capping welding bead is not more than 3 mm:
firstly, carrying out downhill welding on the cover surface welding bead at the bending section 5, wherein the welding parameters are as follows: the current is 300-320A, the voltage is 32-36V, the welding speed is 25-35cm/min, the wire feeding speed is 4.5-5.5m/min, the swinging mode is a sine pendulum, the swinging amplitude is 4-6mm, the swinging frequency is 2.08Hz, the residence time of 0.15s is respectively increased on two sides, and the included angle between a welding gun and the welding bead is kept between 110 and 120 degrees;
welding the cover surface welding bead in the horizontal section 4, wherein the welding parameters are as follows: the welding current is 450-480A, the voltage is 33-35V, the wire feeding speed is 9-11m/min, the welding speed is 55-70cm/min, the swing mode is sine swing, the swing amplitude is 4mm, and the swing frequency is 1.68 Hz.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the invention, it is intended to cover all modifications within the scope of the invention as claimed.
Claims (5)
1. The welding method of the groove weld of the curved cover plate of the shield beam suitable for the hydraulic support comprises a horizontal section and a bent section, an included angle between the bent section and the horizontal section is 145-165 degrees, two sides of the bent cover plate and a main rib of the shield beam form a single V-shaped groove, and the groove angle of the single V-shaped groove is 40 degrees, and the welding method is characterized by comprising the following steps of:
step S1, sequentially dividing the welding bead of the single V-shaped groove into at least one manual seam welding bead, a robot backing welding bead, at least one layer of filling single welding bead, one layer of filling double welding bead and one layer of cover multi-welding bead from bottom to top, wherein the thickness of each welding bead in the horizontal section is approximately equal to that of each bending section;
step S2, carrying out manual seam welding on the manual seam welding track;
s3, placing the shield beam on a robot welding platform to enable the horizontal section to be in a horizontal position, continuously welding the backing weld bead of the robot by adopting a welding robot, and adopting a solid welding wire of 1.6mm and Ar +20% CO during welding 2 The protective gas of (2):
welding a backing weld bead of the robot in the horizontal section, wherein the welding parameters are as follows: the welding current is 390-410A, the voltage is 30-32V, the wire feeding speed is 7-8m/min, the welding speed is 40-45cm/min, the swing form is sine swing, the swing amplitude is 3mm, and the swing frequency is 1.68 Hz;
and then carrying out uphill welding on the robot backing weld bead at the bending section, wherein the welding parameters are as follows: welding current 270-290A, voltage 29-31V, wire feeding speed 4-5m/min, welding speed 20-30cm/min, sine pendulum, pendulum amplitude 6mm, pendulum frequency 2.68Hz, 0.35s dwell time on two sides, and included angle between welding gun and welding bead is kept at 110-120 deg;
step S4, performing filling welding on the filling weld bead by adopting a welding robot, and during welding, adopting a solid welding wire of 1.6mm and Ar +20% CO 2 The shielding gas is continuously applied for each filling welding pass:
firstly, welding the filling welding bead in the horizontal section, wherein the welding parameters are as follows: the welding current is 460-500A, the voltage is 33-36V, the wire feeding speed is 10-12m/min, the welding speed is 55-70cm/min, the swing form is sine swing, the swing amplitude is 3-5mm, and the swing frequency is 1.68 Hz;
and then carrying out uphill welding on the filling weld bead positioned in the bending section, wherein the welding parameters are as follows: the current is 300-320A, the voltage is 31-34V, the wire feeding speed is 4.5-5.5m/min, the welding speed is 20-30cm/min, the swinging mode is a sine pendulum, the swinging amplitude is 5-7mm, the swinging frequency is 2.68Hz, the residence time of 0.35s is respectively increased on two sides, and the included angle between a welding gun and the welding bead is kept between 110 degrees and 120 degrees;
step S5, adopting a welding robot to perform facing welding on the facing weld bead, and adopting a solid welding wire with the diameter of 1.6mm and Ar +20% CO when in welding 2 The shielding gas is continuously welded aiming at each capping welding bead, and the thickness of the capping welding bead is not more than 3 mm:
firstly, carrying out downhill welding on the cover surface welding bead at the bending section, wherein the welding parameters are as follows: the current is 300-320A, the voltage is 32-36V, the welding speed is 25-35cm/min, the wire feeding speed is 4.5-5.5m/min, the swinging mode is a sine pendulum, the swinging amplitude is 4-6mm, the swinging frequency is 2.08Hz, the residence time of 0.15s is respectively increased on two sides, and the included angle between a welding gun and the welding bead is kept between 110 and 120 degrees;
welding the cover surface welding bead in the horizontal section, wherein the welding parameters are as follows: the welding current is 450-480A, the voltage is 33-35V, the wire feeding speed is 9-11m/min, the welding speed is 55-70cm/min, the swing mode is sine swing, the swing amplitude is 4mm, and the swing frequency is 1.68 Hz.
2. The method for welding the bevel weld of the curved cover plate of the hydraulic support shield beam according to claim 1, wherein the method comprises the following steps: when the depth of the single V-shaped groove is 18mm, arranging a layer of filling single welding beads, arranging a layer of filling double welding beads from the straight edge of the single V-shaped groove to the oblique edge, arranging two cover surface welding beads, and arranging the two cover surface welding beads from the oblique edge of the single V-shaped groove to the straight edge; when the depth of the single V-shaped groove is 23mm, two layers of filling single welding beads are arranged, one layer of filling double welding beads are arranged from the straight edge of the single V-shaped groove to the oblique edge, three cover surface welding beads are arranged, and the three cover surface welding beads are arranged from the oblique edge of the single V-shaped groove to the straight edge.
3. The method for welding the bevel weld of the curved cover plate of the hydraulic support shield beam according to claim 1 or 2, which is characterized in that: in step S2, when manual seam welding is performed, a solid wire with a diameter of 1.4mm and Ar +20% CO are used 2 The welding parameters of the mixed gas are as follows:
when the splicing gap of the single V-shaped groove is 0-2mm, a manual sliding seam welding bead is arranged, the welding current is 280-300A, the welding voltage is 29-31V, and the welding speed is 45-55 cm/min;
when the assembling clearance of the single V-shaped groove is larger than 2mm, two manual sliding welding beads are arranged, the two manual sliding welding beads are distributed from the straight edge to the inclined edge of the single V-shaped groove, for the first manual sliding welding bead, the welding current is 250-280A, the welding voltage is 26-28V, the welding speed is 45-55cm/min, and a welding gun points to the main rib and does not swing; aiming at the second manual sliding seam welding bead, the welding current is 280-300A, the welding voltage is 28-30V, the welding speed is 50-55cm/min, the welding gun points to the center of the groove, the swinging mode adopts an elliptical swing, and the swinging amplitude is 1-3 mm.
4. The method for welding the bevel weld of the curved cover plate of the hydraulic support shield beam according to claim 3, wherein the method comprises the following steps: in steps S3-S5, the arc tracking function is started when the welding robot performs welding.
5. The method for welding the bevel weld of the bent cover plate of the hydraulic support shield beam according to claim 4, which is characterized by comprising the following steps of: before the step S2, the welding seam needs to be cleaned, impurities such as rust, oil stain and scum within the range of 20mm on the two sides of the welding seam are removed, and an angle grinder is adopted to grind the surface of the welding seam until the metal luster appears.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210755786.2A CN115026389B (en) | 2022-06-30 | 2022-06-30 | Welding method suitable for welding groove weld of bent cover plate of hydraulic support shield beam |
| PCT/CN2023/088912 WO2024001438A1 (en) | 2022-06-30 | 2023-04-18 | Welding method suitable for groove weld of hydraulic support shield beam bent cover plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210755786.2A CN115026389B (en) | 2022-06-30 | 2022-06-30 | Welding method suitable for welding groove weld of bent cover plate of hydraulic support shield beam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115026389A true CN115026389A (en) | 2022-09-09 |
| CN115026389B CN115026389B (en) | 2023-07-25 |
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| WO (1) | WO2024001438A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024001438A1 (en) * | 2022-06-30 | 2024-01-04 | 郑州煤矿机械集团股份有限公司 | Welding method suitable for groove weld of hydraulic support shield beam bent cover plate |
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| JP2003290921A (en) * | 2002-03-27 | 2003-10-14 | Hitachi Ltd | Multi-layer welding method, and multi-layer automatic welding equipment |
| CN112059371A (en) * | 2020-08-26 | 2020-12-11 | 郑州煤矿机械集团股份有限公司 | Automatic welding method for narrow groove of hydraulic support structural part |
| CN113275710A (en) * | 2021-05-31 | 2021-08-20 | 郑州煤矿机械集团股份有限公司 | Non-preheating welding method for 750MPa grade high-strength steel medium plate for hydraulic support |
| CN113275711A (en) * | 2021-05-31 | 2021-08-20 | 郑州煤矿机械集团股份有限公司 | Method for welding hydraulic support structural part by using welding wire with diameter of 1.4mm |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3572985B2 (en) * | 1999-03-10 | 2004-10-06 | Ｊｆｅエンジニアリング株式会社 | Multi-electrode submerged arc welding method |
| JP5470576B2 (en) * | 2009-06-23 | 2014-04-16 | 株式会社神戸製鋼所 | Hydraulic excavator attachment |
| CN102151942B (en) * | 2011-03-17 | 2013-04-17 | 山东矿机集团股份有限公司 | Hydraulic support self-preheating and automatic step-by-step welding process |
| CN113172302A (en) * | 2021-04-12 | 2021-07-27 | 中煤北京煤矿机械有限责任公司 | Welding method for fusion welding of hydraulic support structural part |
| CN115026389B (en) * | 2022-06-30 | 2023-07-25 | 郑州煤矿机械集团股份有限公司 | Welding method suitable for welding groove weld of bent cover plate of hydraulic support shield beam |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2003290921A (en) * | 2002-03-27 | 2003-10-14 | Hitachi Ltd | Multi-layer welding method, and multi-layer automatic welding equipment |
| CN112059371A (en) * | 2020-08-26 | 2020-12-11 | 郑州煤矿机械集团股份有限公司 | Automatic welding method for narrow groove of hydraulic support structural part |
| CN113275710A (en) * | 2021-05-31 | 2021-08-20 | 郑州煤矿机械集团股份有限公司 | Non-preheating welding method for 750MPa grade high-strength steel medium plate for hydraulic support |
| CN113275711A (en) * | 2021-05-31 | 2021-08-20 | 郑州煤矿机械集团股份有限公司 | Method for welding hydraulic support structural part by using welding wire with diameter of 1.4mm |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024001438A1 (en) * | 2022-06-30 | 2024-01-04 | 郑州煤矿机械集团股份有限公司 | Welding method suitable for groove weld of hydraulic support shield beam bent cover plate |
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| WO2024001438A1 (en) | 2024-01-04 |
| CN115026389B (en) | 2023-07-25 |
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