Novel automatic welding method for surfacing blowout preventer horse race form area

Abstract

The invention discloses a novel automatic welding method for a build-up welding blowout preventer horse race form area, the horse race form area is build-up welded on a blowout preventer, the horse race form area is an arc and straight line runway type area with equal upper and lower widths, and the horse race form area comprises an arc area, a straight line section area and a side face perforation area; the two linear segment areas are tangent to the two arc areas, the two linear segment areas are arranged in parallel, and the middle connecting lines of the arc areas and the linear segment areas at the two ends are symmetrically distributed; the side surface perforation area passes through the marquee form area; during surfacing, a plurality of annular welding seams are surfaced, and the welding seams are arranged side by side in parallel or arranged side by side in an overlapped mode. According to the invention, surfacing is carried out in the marquee form area, a plurality of annular welding seams are surfaced, and the welding seams are arranged side by side in parallel or overlapped side by side, so that the welding efficiency is improved, the surfacing is uniform, the welding seams are coherent, the thickness of the welding layer is consistent, and the novel automatic marquee surfacing method is high in quality.

Description

Technical Field

[0001] The invention relates to surfacing welding, in particular to a novel automatic welding method for surfacing a racetrack-shaped area of ​​a blowout preventer. Background Art

[0002] In production practice, there is a need to perform racetrack-style regional surfacing on the blowout preventer. The existing technology often uses manual semi-automatic adjustment of the weld bead for welding, which not only has low welding efficiency, but also easily leads to discontinuous welds and inconsistent thickness, affecting the overall welding effect.

[0003] Therefore, it is necessary to develop a new automatic welding method for the racecourse-shaped area of ​​the cladding blowout preventer to overcome the shortcomings of the existing technology. Summary of the invention

[0004] Purpose of the invention: In view of the shortcomings and defects of the prior art, the present invention provides a new automatic welding method for surfacing the racetrack-shaped area of ​​a blowout preventer, in which surfacing welding is performed in the racetrack-shaped area, and a number of annular welds are surfacing and the welds are arranged in parallel or superimposed side by side, thereby improving welding efficiency, ensuring uniform surfacing, continuous welds and consistent weld layer thickness, and providing a high-quality new automatic surfacing racetrack method.

[0005] Technical solution: A novel automatic welding method for surfacing the racetrack-shaped area of ​​a blowout preventer of the present invention is characterized in that: a racetrack-shaped area is surfacing on the blowout preventer, the racetrack-shaped area is a runway-shaped area of ​​an arc with equal width above and below and a straight line, the racetrack-shaped area includes an arc area, a straight line segment area and a side perforated area, two straight line segment areas are tangent to two arc areas, the two straight line segment areas are arranged in parallel, and the arc areas at both ends are symmetrically distributed with the connecting lines of the middle parts of the straight line segment areas; the side perforated area passes through the racetrack-shaped area; during the surfacing welding, a plurality of annular welds are surfacing, and the welds are arranged in parallel side by side or superimposed side by side.

[0006] Wherein, the center spacing between the surfacing welds is 2.5mm to 3.5mm.

[0007] Wherein, the thickness of the cladding weld is 1.5 mm to 2.5 mm.

[0008] The welds are stacked side by side, 2 to 3 weld layers are stacked, and the welds of adjacent weld layers are staggered.

[0009] Wherein, the weld is a 625 nickel alloy weld.

[0010] The novel automatic welding method for the racetrack-shaped area of ​​the surfacing blowout preventer of the present invention comprises the following steps:

[0011] 1) Place the blowout preventer to be welded on the tooling of the welding equipment, and make the straight section of the racetrack area to be welded parallel to the forward movement direction of the beam of the welding equipment;

[0012] 2) Turn on the main power, welding power, and welding shielding gas. After the equipment is turned on and running stably, enter the workpiece surfacing mode interface on the remote control and select the racecourse surfacing mode;

[0013] 3) Input the corresponding racecourse dimensions in the racecourse surfacing mode, including arc diameter, straight line segment size and diameter, perforation diameter, and perforation bottom height;

[0014] 4) After the remote control is used to control the moving crossbeam, the position and level of the blowout preventer are adjusted, and the moving welding gun workpiece path is calibrated; after calibration, the welding gun is moved to the bottom of the perforation in the side perforation area, and the bottom calibration is clicked, and then the welding gun is prepared for the arc starting position, and the starting point is clicked to confirm; and then the arc starting angle is clicked;

[0015] 5) Determine the arc starting position X, move the welding gun to the starting point of the X axis, then move the radius axis slide to calibrate the rotation radius;

[0016] 6) Move the welding gun to the arc starting position;

[0017] 7) After calibrating the position, the remote controller returns to the automatic interface and inputs the welding parameters including welding speed 28cm / min~30cm / min, wire feeding speed 1.8m / min~2.0m / min, welding voltage 12V~15V, hot wire current 40A~60A, hot wire voltage 5V~6V, pulse frequency 2.5Hz, duty cycle 60%, arc voltage tracking accuracy 0.5V, arc voltage adjustment increment 0.1V, and back off 2.0mm after welding;

[0018] 8) Start welding and proceed according to the welding route designed according to the set dimensions until the cladding is completed.

[0019] Among them, the arc starting position height in the step 4) must be the same as the set value to avoid inaccurate closed hole height.

[0020] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: the present invention performs surfacing welding in a racecourse-shaped area, surfacing welding several annular welds and the welds are arranged in parallel or superimposed side by side, thereby improving welding efficiency, ensuring uniform surfacing, continuous welds and consistent weld layer thickness, and providing a high-quality new automatic surfacing racecourse method. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The structure of the racecourse area of ​​the present invention is shown in FIG. Figure 1 ; A is the arc area and the straight line segment area;

[0022] Figure 2 The structure of the racecourse area of ​​the present invention is shown in FIG. Figure 2 ; B is the side perforation area;

[0023] Figure 3 The structure of the racecourse after surfacing welding of the present invention is shown in FIG. Figure 1 ; A is the arc area and the straight line segment area;

[0024] Figure 4 The structure of the racecourse after surfacing welding of the present invention is shown in FIG. Figure 2 ; B is the side perforation area. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0026] The novel automatic welding method for surfacing the racetrack-shaped area of ​​a blowout preventer of the present invention comprises surfacing the racetrack-shaped area on the blowout preventer, the racetrack-shaped area being a runway-shaped area of ​​a circular arc with equal width at the top and the bottom plus a straight line, the racetrack-shaped area comprising a circular arc area, a straight line segment area and a side perforated area, two straight line segment areas are tangent to two circular arc areas, the two straight line segment areas are arranged in parallel, the circular arc areas at both ends and the middle connecting lines of the straight line segment areas are symmetrically distributed; the side perforated area passes through the racetrack-shaped area; during surfacing welding, a plurality of annular welds are surfacing, and the welds are arranged in parallel side by side or in superposition side by side.

[0027] The center spacing between the cladding welds of the present invention is 2.5 mm to 3.5 mm. The thickness of the cladding weld is 1.5 mm to 2.5 mm. The welds are arranged side by side, 2 to 3 weld layers are arranged, and the welds of adjacent weld layers are arranged in a staggered manner. The welds are 625 nickel alloy welds.

[0028] The novel automatic welding method for the racetrack-shaped area of ​​the surfacing blowout preventer of the present invention comprises the following steps:

[0029] 1) Place the blowout preventer to be welded on the tooling of the welding equipment, and make the straight section of the racetrack area to be welded parallel to the forward movement direction of the beam of the welding equipment;

[0030] 2) Turn on the main power, welding power, and welding shielding gas. After the equipment is turned on and running stably, enter the workpiece surfacing mode interface on the remote control and select the racecourse surfacing mode;

[0031] 3) Input the corresponding racecourse dimensions in the racecourse surfacing mode, including arc diameter, straight line segment size and diameter, perforation diameter, and perforation bottom height;

[0032] 4) After the remote control is used to control the moving crossbeam, the position and level of the blowout preventer are adjusted, and the moving welding gun workpiece path is calibrated; after calibration, the welding gun is moved to the bottom of the perforation in the side perforation area, and the bottom calibration is clicked, and then the welding gun is prepared for the arc starting position, and the starting point is clicked to confirm; then the arc starting angle is clicked; the arc starting position height must be the same as the set value to avoid inaccurate closed hole height;

[0033] 5) Determine the arc starting position X, move the welding gun to the starting point of the X axis, then move the radius axis slide to calibrate the rotation radius;

[0034] 6) Move the welding gun to the arc starting position;

[0035] 7) After calibrating the position, the remote controller returns to the automatic interface and inputs the welding parameters including welding speed 28cm / min~30cm / min, wire feeding speed 1.8m / min~2.0m / min, welding voltage 12V~15V, hot wire current 40A~60A, hot wire voltage 5V~6V, pulse frequency 2.5Hz, duty cycle 60%, arc voltage tracking accuracy 0.5V, arc voltage adjustment increment 0.1V, and back off 2.0mm after welding;

[0036] 8) Start welding and proceed according to the welding route designed according to the set dimensions until the cladding is completed.

[0037] The present invention performs surfacing welding in a racecourse-shaped area, surfacing welding a plurality of annular welds and arranging the welds in parallel or overlapping each other, thereby improving welding efficiency, achieving uniform surfacing welding, continuous welds and consistent weld layer thickness, and providing a high-quality new automatic surfacing racecourse method.

Claims

1. A novel automatic welding method for the racetrack area of ​​a surfacing blowout preventer, characterized in that: A racetrack-shaped area is welded on the blowout preventer. The racetrack-shaped area is a runway-shaped area with an arc of equal width at the top and the bottom and a straight line. The racetrack-shaped area includes an arc area, a straight line segment area and a side perforated area. Two straight line segments are tangent to two arc areas. The two straight line segments are arranged in parallel. The arc areas at both ends are symmetrically connected to the middle parts of the straight line segments. The side perforated area passes through the racetrack-shaped area. During the welding, a plurality of annular welds are welded, and the welds are arranged in parallel or superimposed side by side.

2. The new automatic welding method for the racetrack area of ​​the surfacing blowout preventer according to claim 1 is characterized by: The center spacing between the surfacing welds is 2.5 mm to 3.5 mm.

3. The new automatic welding method for the racetrack area of ​​the surfacing blowout preventer according to claim 1 is characterized by: The thickness of the cladding weld is 1.5 mm to 2.5 mm.

4. The novel automatic welding method for the racetrack-shaped area of ​​the surfacing blowout preventer according to claim 1 is characterized by: The welds are arranged in parallel and stacked, 2 to 3 weld layers are stacked, and the welds of adjacent weld layers are arranged in a staggered manner.

5. The novel automatic welding method for the racetrack area of ​​the surfacing blowout preventer according to claim 1 is characterized by: The weld is a 625 nickel alloy weld.

6. The novel automatic welding method for the racetrack-shaped area of ​​a surfacing blowout preventer according to any one of claims 1 to 5, characterized in that: The steps include: 1) Place the blowout preventer to be welded on the tooling of the welding equipment, and make the straight section of the racetrack area to be welded parallel to the forward movement direction of the beam of the welding equipment; 2) Turn on the main power, welding power, and welding shielding gas. After the equipment is turned on and running stably, enter the workpiece surfacing mode interface on the remote control and select the racecourse surfacing mode; 3) Input the corresponding racecourse dimensions in the racecourse surfacing mode, including arc diameter, straight line segment size and diameter, perforation diameter, and perforation bottom height; 4) After the remote control is used to control the moving crossbeam, the position and level of the blowout preventer are adjusted, and the moving welding gun workpiece path is calibrated; after calibration, the welding gun is moved to the bottom of the perforation in the side perforation area, and the bottom calibration is clicked, and then the welding gun is prepared for the arc starting position, and the starting point is clicked to confirm; and then the arc starting angle is clicked; 5) Determine the arc starting position X, move the welding gun to the starting point of the X axis, then move the radius axis slide to calibrate the rotation radius; 6) Move the welding gun to the arc starting position; 7) After calibrating the position, the remote controller returns to the automatic interface and inputs the welding parameters including welding speed 28cm / min~30cm / min, wire feeding speed 1.8m / min~2.0m / min, welding voltage 12V~15V, hot wire current 40A~60A, hot wire voltage 5V~6V, pulse frequency 2.5Hz, duty cycle 60%, arc voltage tracking accuracy 0.5V, arc voltage adjustment increment 0.1V, and back off 2.0mm after welding; 8) Start welding and proceed according to the welding route designed according to the set dimensions until the cladding is completed.

7. The novel automatic welding method for surfacing the racetrack area of ​​a blowout preventer according to claim 6 is characterized by: In step 4), the arc starting position height must be the same as the set value to avoid inaccurate closed hole height.

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