Automatic cladding welding device for high-wear-resistance steel tooth roller bit

Abstract

The utility model belongs to the technical field of petroleum drilling equipment, and particularly relates to an automatic cladding welding device for a high-wear-resistance steel tooth roller bit, which comprises a double-shaft positioner, a six-shaft manipulator, a cooling-water machine, a manipulator programming touch screen window, a master console, a laser gun, a manipulator control cabinet, a laser and two powder feeders, the powder feeder is connected with the laser gun through a pipeline, powder is fed into the laser gun through argon, the laser gun is installed at the tail end of the six-axis mechanical arm, the double-axis positioner is located on one side of the six-axis mechanical arm, the six-axis mechanical arm is electrically connected with the mechanical arm control cabinet through a line, and the mechanical arm control cabinet is electrically connected with the powder feeder through a line. The mechanical arm control cabinet is electrically connected with the mechanical arm programming touch screen window through a circuit, and the mechanical arm control cabinet is electrically connected with the double-shaft positioner through a circuit. According to the utility model, automatic hardfacing of the steel-tooth roller bit, a large-size roller bit and a medium-size roller bit (more than 6 inches), especially a small-size steel-tooth roller bit, is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of petroleum drilling equipment, and particularly relates to an automatic cladding welding device for a high-wear-resistant steel tooth cone drill bit. Background Art

[0002] Roller cone drill bits are commonly used in the drilling process in industries such as petroleum and mining. Connected to the drill string or a mud motor, they rotate under the drive of a top drive or mud pump, applying weight on bit to drill into the formation. Common roller cone drill bits include steel-toothed and insert-toothed. The teeth of insert-toothed roller cone bits are made of cemented carbide (sintered from cobalt and tungsten carbide powder). External pressure is applied to press the carbide teeth into the tooth holes on the cone, securing them with an interference fit.

[0003] The other type is a steel-toothed roller drill bit. The roller body is made of steel, and the steel teeth are directly processed by machining equipment. The tooth surface is welded with wear-resistant materials. The most common method is to use oxyacetylene welding to melt the tubular tungsten carbide electrode (tungsten carbide powder is poured into the carbon steel tube) and then weld it to the tooth surface, which plays a role in wear resistance and rock crushing.

[0004] Generally speaking, steel-tooth roller bits are used in soft formations, while insert-tooth roller bits are used in relatively hard formations. Roller bits are further divided into different models based on tooth height, tooth shape, and tooth density, and are further subdivided for different soft and hard formations.

[0005] For steel-tooth roller drill bits, the common method is to use an oxyacetylene flame or argon arc welding to melt a wear-resistant electrode and then weld the wear-resistant layer onto the tooth surface. The electrode is a tungsten carbide-filled carbon steel tube. Due to the complex tooth profile and small spacing between teeth, automated cladding using plasma automatic welding is difficult for roller drill bits, especially small ones. Small drill bits, such as those 4 inches and below, or the short, small, and densely packed roller drill bits with IADC codes 217 and 317, are particularly difficult to achieve with oxyacetylene welding. Manual welding also presents challenges. Due to the short tooth surface, the weld layer is difficult to spread, and the tooth tips will have a spherical or quasi-spherical shape after cladding, which can affect penetration during use. Utility Model Content

[0006] The purpose of the utility model is to provide an automatic cladding welding device for a high-wear-resistant steel tooth cone drill bit to solve the problems existing in the prior art.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic cladding welding device for a high-wear-resistant steel tooth cone drill bit, comprising a dual-axis positioner, a six-axis manipulator, a chiller, a manipulator programming touch screen window, a main control console, a laser gun, a manipulator control cabinet, a laser and a powder feeder, wherein there are two powder feeders, the powder feeder is connected to the laser gun through a pipeline, and the powder is fed into the laser gun through argon gas, the laser gun is installed at the end of the six-axis manipulator, the dual-axis positioner is located on one side of the six-axis manipulator, a tool for fixing the cone is installed on the dual-axis positioner, and the six-axis manipulator is connected to the laser gun through a line. The circuit is electrically connected to the manipulator control cabinet, the manipulator control cabinet is electrically connected to the manipulator programming touch screen window through the circuit, the manipulator control circuit is electrically connected to the dual-axis positioner through the circuit, and the dual-axis positioner and the six-axis manipulator realize 8-axis linkage through the open communication window. The chiller is respectively connected to the laser gun and the laser through pipelines, and the manipulator control cabinet, laser, powder feeder, and chiller are connected to the main console through the circuit. The main console controls the laser power, the powder feeding speed of the powder feeder, and the temperature parameters of the chiller, and controls the simultaneous start-up of the manipulator control cabinet, laser, powder feeder, and chiller, or the start-up in sequence.

[0008] Preferably, the tooling includes an elastic expansion sleeve, a fixed tooling and a chuck, the elastic expansion sleeve is mounted on the fixed tooling, the bottom of the fixed tooling is fixed on the chuck, and the chuck is mounted on the dual-axis positioner.

[0009] Preferably, the robot programming touch screen window is used for robot trajectory programming and starting point setting. When the main console gives a signal, the six-axis robot runs to the starting point and starts to move according to the programmed program. At the same time, the main console gives a signal to start the laser, the powder feeder starts feeding powder, and the chiller starts.

[0010] The beneficial effects of the utility model are as follows: the utility model combines laser cladding technology with a six-axis robot and a dual-axis gapless positioner, and then realizes automatic wear-resistant surfacing of steel-tooth cone drill bits, large and medium-sized cones (drill bits above 6 inches), and especially small-sized steel-tooth cone drill bits by designing a special fast clamping tool and coordinating with specific wear-resistant materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a cross-sectional view of the steel tooth gear in the utility model;

[0012] Figure 2 This is a position diagram of the six-axis manipulator and the two-axis positioner in the utility model;

[0013] Figure 3 It is an enlarged view of the laser gun in the present utility model;

[0014] Figure 4 It is a three-dimensional diagram of the utility model;

[0015] Figure 5 It is a top view of the utility model;

[0016] Figure 6 It is a connection diagram of the circuit in the utility model;

[0017] Figure 7 It is a cross-sectional view of the tooling in the utility model;

[0018] Figure 8 This is a working state diagram of the six-axis manipulator and the two-axis positioner in the utility model;

[0019] Figure 9 It is a schematic diagram of laser cladding welding;

[0020] Figure 10 It is the trajectory diagram of surfacing welding;

[0021] Figure 11 It is a schematic diagram of the wear-resistant material trajectory after surfacing. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second" and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0024] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixedly connected," and "fixed connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art can understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0025] The specific implementation of the present invention is described in detail below with reference to the accompanying drawings and preferred embodiments.

[0026] like Figure 1 As shown, it is a cross-sectional view of the gear. The present utility model only relates to the steel tooth gear, so the cross-sectional view of the steel tooth gear is used, which includes steel teeth 1, a gear body 2 and an inner hole sliding bearing surface 3.

[0027] The utility model combines laser cladding technology with a six-axis robot and a dual-axis gapless positioner, and then realizes automatic wear-resistant surfacing of steel tooth cone drill bits, large and medium-sized cones (drill bits above 6 inches), especially small-sized steel tooth cone drill bits, by designing a special fast clamping tool and coordinating with specific wear-resistant materials.

[0028] See the overall layout Figure 2 The six-axis manipulator communicates with the two-axis RV positioner to achieve 8-axis linkage. The manipulator fixes the laser welding gun. The selected laser can be selected as 5KW, 6KW, 8KW, 12KW or higher power according to needs.

[0029] The laser cladding gun is driven by a robot to perform operations such as movement, swing, and angle shift.

[0030] The basic motion system of the overall system is a six-axis robot and a two-axis positioner that have been linked and communicated.

[0031] The cladding system includes a laser, a laser cladding gun, and a powder feeder. Powder is fed into the powder feeder using argon, which also serves as a shielding gas. The laser is cooled by circulating water from a water chiller.

[0032] like Figure 4 and Figure 5 As shown in the figure, it is the overall layout of the system, including a dual-axis positioner 4, a six-axis manipulator 5, a chiller 6, a manipulator programming touch screen window 7, a main control console 8, a laser gun 9, a manipulator control cabinet 10, a laser 11 and a powder feeder 12. The figure is equipped with two powder feeders, so two kinds of powder can be used for surfacing welding. If only one kind of powder is needed, then one powder feeder can be used. The powder feeder is connected to the laser gun through a pipeline, and the powder is fed into the gun through argon gas.

[0033] like Figure 6 As shown above, this is the logic diagram of lines, pipelines and communications.

[0034] The manipulator 5 is connected to the manipulator control cabinet 10 via line G, and the manipulator control cabinet 10 is connected to the manipulator programming touch screen window 7 via line A. This is a standard connection of a conventional manipulator system.

[0035] The manipulator control cabinet 10 is connected to the double-axis positioner 4 via a line H. By opening a communication window, the double-axis positioner 4 and the manipulator 5 realize 8-axis linkage.

[0036] The manipulator 5 fixes the laser gun 9, and the powder feeder 12 is connected to the laser gun 9 through a pipeline F to realize powder feeding and shielding gas feeding.

[0037] The chiller is connected to the laser gun 9 and the laser 11 through the pipeline J and the pipeline I respectively, so as to cool the laser gun 9 and the laser 11.

[0038] The manipulator control cabinet 10, the laser 11, the powder feeder 12, and the chiller 6 are connected to the main control console 8 through lines. The main control console 8 can also be called a process control console to achieve the coordinated work of the three. The main control console 8 controls the power of the laser 3, the powder feeding speed of the powder feeder 12, the temperature of the chiller 6 and other parameters, and at the same time controls the simultaneous start-up of the manipulator control cabinet 10, the laser 11, the powder feeder 12, and the chiller 6, or starts them one after another.

[0039] The robot programming touchscreen window 7 is primarily used for programming the robot's trajectory and setting its starting point. When the main control console 8 signals the robot 5 to its starting point, it begins its movement according to the programmed program. Simultaneously, the main control console 8 signals the laser 11 to start, the powder feeder 12 to begin feeding powder, and the chiller 6 to start.

[0040] At this time, powder and protective gas are fed into the laser gun 9, and a laser beam is generated on the surface of the workpiece to melt the powder and realize cladding.

[0041] Since the trajectory of the roller drill bit that needs to be surfacing is relatively complex, an 8-axis linkage system consisting of a manipulator 5 and a dual-axis positioner 4 is used.

[0042] As mentioned earlier, the IADC code for steel-tooth roller cone drill bits, such as the 6-1 / 8-inch 317 type roller cone (see the figure above), has small and dense teeth. Smaller models of roller cones, such as the 3-7 / 8-inch 317 type and the 2-7 / 8-inch 211 type shown in the figure, have very limited steel tooth sizes due to their relatively small size.

[0043] After manual welding, due to the very small tooth surface, the flow of the molten welding rod is restricted, and the head often becomes spherical or quasi-spherical. On the one hand, the appearance is poor, and on the other hand, the penetration is affected.

[0044] When using laser welding, the focus of the light beam is very small and is not sensitive to the influence of geometric contours. The focus can be moved back and forth to achieve surfacing, and the thickness can be controlled very finely, so the contour of the surfacing layer can be perfectly guaranteed.

[0045] Based on the 3D image of the cone itself, the machining trajectory program is automatically generated through offline programming software such as SPrutCAM. Similar software is available, but is not limited to this. The program written using the above hardware and software can complete the small drill mentioned above, as well as medium and large steel tooth cone drills.

[0046] like Figure 7 As shown above, this is an example of a tooling for fixing a steel toothed gear, but it is not limited to this tooling. It includes a chuck 16 mounted on a dual-axis positioner 4, a fixing tooling 15 positioned according to the inner hole of the gear, and an elastic expansion sleeve 14. The inner hole size can be used to quickly clamp the gear. Other designs can achieve fixed positioning of the gear. The above is only an example and is not limited to this. Figure 8 .

[0047] Figure 9 This is a schematic diagram of laser cladding welding. After the gear is fixed, the program and starting point are completed and cladding welding can be started. The trajectory is set during the cladding process to complete each tooth.

[0048] like Figure 10 As shown, the walking trajectory can refer to the above examples. In addition to horizontal reciprocating walking, vertical unilateral walking or reciprocating walking or adding swinging can also be completed. The above is only an example and is not limited to this.

[0049] like Figure 11 The figure shows an example of a wear-resistant material trace after surfacing welding. The material can be nickel-based tungsten carbide, with the tungsten carbide ratio adjusted as needed. Alternatively, it can be iron-based powder, or even powder containing synthetic diamond powder. The above is merely an example and is not intended to be limiting.

[0050] It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An automatic cladding welding device for a high wear-resistant steel tooth roller drill bit, characterized by: It includes a dual-axis positioner, a six-axis manipulator, a chiller, a manipulator programming touch screen window, a main console, a laser gun, a manipulator control cabinet, a laser and a powder feeder. There are two powder feeders, which are connected to the laser gun through a pipeline and feed the powder into the laser gun through argon gas. The laser gun is installed at the end of the six-axis manipulator. The dual-axis positioner is located on one side of the six-axis manipulator. A tool for fixing the gear is installed on the dual-axis positioner. The six-axis manipulator is electrically connected to the manipulator control cabinet through a line. The manipulator control cabinet is electrically connected to the manipulator control cabinet through a line. The circuit is electrically connected to the robot programming touch screen window, the robot control circuit is electrically connected to the dual-axis positioner, and by opening the communication window, the dual-axis positioner and the six-axis robot realize 8-axis linkage. The chiller is respectively connected to the laser gun and the laser through pipelines, and the robot control cabinet, laser, powder feeder, and chiller are connected to the main control console through circuits. The main control console controls the laser power, the powder feeding speed of the powder feeder, and the temperature parameters of the chiller, and controls the simultaneous start-up of the robot control cabinet, laser, powder feeder, and chiller, or the start-up in sequence.

2. The automatic cladding welding device for a high wear-resistant steel tooth roller drill according to claim 1 is characterized in that: The tooling includes an elastic expansion sleeve, a fixed tooling and a chuck. The elastic expansion sleeve is installed on the fixed tooling. The bottom of the fixed tooling is fixed on the chuck. The chuck is installed on the dual-axis positioner.

3. The automatic cladding welding device for a high wear-resistant steel tooth roller drill according to claim 1 is characterized in that: The robot programming touch screen window is used for robot trajectory programming and starting point setting. When the main console gives a signal, the six-axis robot moves to the starting point and starts to move according to the programmed program. At the same time, the main console gives a signal to start the laser, the powder feeder and the chiller.

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