Valve body machining and welding device

Abstract

The invention discloses a valve body machining and welding device, and relates to the technical field of valve body machining, the valve body machining and welding device comprises a base, the top of the base is provided with a cover body, the top of the cover body is provided with a controller, the center of the top of the base is provided with a positioning mechanism, and the top of the cover body is provided with an electric welding equipment main body; a shell with a downward opening is arranged on the inner wall of the top of the cover body, a welding mechanism is arranged on the inner side of the shell, a valve body workpiece and a flange plate workpiece can be located on the same axis after being positioned, dislocation caused by butt joint of the valve body workpiece and the flange plate workpiece is avoided, meanwhile, through multi-point-position rotating welding, welding efficiency is improved, and welding quality is improved. It is guaranteed that each time of spot welding is not affected by the heat of the last time of welding, and the welded welding face is smooth and attractive.

Description

Technical Field

[0001] The invention relates to the technical field of valve body processing, in particular to a valve body processing welding device. Background Art

[0002] The valve body is a major component in the valve. The valve is a device that controls the direction, pressure, and flow of the fluid, and can make the liquid, gas, and powder media in the piping and equipment flow or stop. In the valve production process, welding is an important link in valve production, which is related to the sealing and structural strength of the valve. The inside of the valve body is welded by using a welding device to ensure that its structure is firm and its sealing is good. The end of the valve body is usually welded to the flange. The flange can be connected to the flange in the pipeline when it is installed in the pipeline later. In terms of welding methods, arc welding is usually used for welding. In arc welding, the metal to be welded is used as one pole and the welding rod is used as the other pole. When the two poles are close, an arc is generated. The heat generated by the arc discharge is used to melt the welding rod and the workpiece together and form a weld after condensation.

[0003] The existing valve body processing welding device manually uses an electric welding gun connected to the main equipment to align with the joint between the valve body and the flange to perform single-point mobile welding. During the continuous movement of the end of the electric welding gun, an arc is generated at the previous point and heat is generated at the same time. The heat is absorbed by the valve body and then transferred to the outside, causing the point that has absorbed part of the heat after the movement to be repeatedly heated by the heat of the arc discharge, and the solder will melt prematurely. It is difficult to manually control the movement speed of the electric welding gun, which will cause uneven weld surface after welding. Summary of the invention

[0004] The technical solution of the present invention aims at the technical problem that the existing technical solution is too single, and provides a solution that is significantly different from the existing technology. Specifically, the purpose of the present invention is to provide a valve body processing welding device to solve the problem of uneven welding surface when manually controlling the electric welding gun to perform single-point mobile welding proposed in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a valve body processing and welding device, comprising a base, a cover body is arranged on the top of the base, a controller is installed on the top of the cover body, a positioning mechanism is arranged at the top center of the base, a welding equipment body is installed on the top of the cover body, a shell with an opening facing downward is arranged on the top inner wall of the cover body, and a welding mechanism is arranged on the inner side of the shell.

[0006] Preferably, the positioning mechanism includes a cylinder arranged at the top center of the base, side columns are arranged at equal angles on the outer walls of the upper and lower ends of the cylinder, the outer wall of the cylinder is located inside the side column and is connected to a first spring, the end of the first spring is connected to a first piston that slides with the side column, the outer wall of the first piston is connected to a positioning column, a second piston that slides with the first piston is arranged inside the cylinder, and the top of the second piston is connected to a threaded rod that is threadedly connected to the top of the cylinder.

[0007] Preferably, an air hole is provided at the top of the cylinder on one side of the threaded rod, and an oil filling port is provided on the outer wall of the upper end of the cylinder, and an oil delivery hole connected to the side column is provided on the outer wall of the cylinder.

[0008] Preferably, the welding mechanism includes a turntable arranged at the bottom end of the shell, the inner wall of the shell is provided with a ball bearing that fits the bottom of the turntable, a servo motor is installed on the top inner wall of the cover body, the output end of the servo motor is connected to a rotating shaft that penetrates into the turntable, a hole groove is opened on the top of the turntable on the outside of the rotating shaft, a rotating ring is sleeved on the outside of the bottom of the rotating shaft, a first vortex spring is connected between the rotating shaft and the rotating ring, a fixed ring located on the outside of the rotating ring is fixedly provided on the inner wall of the bottom end of the turntable, a second vortex spring is connected between the rotating ring and the fixed ring, six groups of electric welding guns are arranged at equal angles on the bottom of the turntable, and an auxiliary drive assembly is arranged inside the turntable.

[0009] Preferably, six groups of rotating rods are equi-angle-rotatably connected to the bottom of the turntable, and the six groups of rotating rods are respectively arranged corresponding to the six groups of electric welding guns, the top of the rotating ring and the outer wall of one side of the six groups of rotating rods are respectively connected with a traction rope, the inner wall of the turntable and the outer wall of the other side of the six groups of rotating rods are respectively connected with a second spring, and the lower ends of the six groups of rotating rods are respectively fixed to the upper ends of the six groups of rotating rods.

[0010] Preferably, the bottom end of the turntable is located on the outside of the six groups of rotating rods and movable grooves are respectively opened, and the inner wall of the bottom end of the turntable is located on one side of the traction rope and a guide wheel is correspondingly arranged.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a positioning mechanism, rotates the threaded rod, the threaded rod rotates and moves downward and pushes the second piston, the second piston squeezes the oil, because the first spring elastic force in the upper side column is the same and smaller than the first spring elastic force in the lower side column, the oil will first be injected into the three groups of side columns above through the oil delivery hole, the oil will push the first piston and pull the first spring, the first piston will push the positioning column to move, the positioning columns in the three groups of side columns above will first press against the inner wall of the valve body workpiece, and similarly the positioning columns in the three groups of side columns below will press against the inner wall of the flange workpiece, so that the valve body workpiece and the flange workpiece are coaxial after positioning, avoiding misalignment of the valve body workpiece and the flange workpiece when they are connected, which affects the subsequent welding process; The present invention drives the electric welding gun to perform multi-point welding through the turntable during welding. After the turntable starts to rotate, the electric welding gun moves away from the welding position. When the turntable stops rotating, spot welding can be performed on the point where the electric welding gun lands. The turntable rotates indirectly, first rotating six times in sequence, each rotating angle is 10 degrees, and spot welding is performed at the moment of each rotation stop, ensuring that each point will not be affected by the heat of the adjacent points during spot welding. If there is still a gap between the points, the electric welding gun can be indirectly rotated in the same way on the next arc segment with an angle of 60 degrees, and the position of each stop is located at the midpoint of the arc segment between the welded points, and spot welding is performed again. The solder has a state of outward diffusion after melting, and spot welding can be performed in the middle of the spot welded points, and so on, until there is no gap between the welding points, so that the points on both sides of the position of the next spot welding are the positions of the initial spot welding of the previous time, the heat has cooled down, and will not be affected by the heat, and the welded surface is smooth and beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front cross-sectional structural schematic diagram of the present invention; Figure 2 It is a top view distribution structure diagram of the cylinder and the side column of the present invention; Figure 3 For the present invention Figure 1 A in the enlarged view; Figure 4 It is a schematic diagram of a top cross-sectional structure of a turntable of the present invention; Figure 5 It is a schematic diagram of the welding trajectory of the present invention.

[0013] In the figure: 1. base; 2. cover; 3. controller; 4. cylinder; 41. side column; 42. first spring; 43. first piston; 44. positioning column; 45. second piston; 46. threaded rod; 5. welding equipment body; 6. shell; 7. turntable; 71. servo motor; 72. rotating shaft; 73. rotating ring; 74. first vortex spring; 75. fixing ring; 76. second vortex spring; 77. rotating rod; 78. traction rope; 79. guide wheel; 710. second spring; 711. welding gun. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] See also Figure 1-5 The present invention provides a technical solution: a valve body processing and welding device, including a base 1, a cover body 2 is arranged on the top of the base 1, a controller 3 is installed on the top of the cover body 2, a positioning mechanism is arranged at the top center of the base 1, a welding equipment body 5 is installed on the top of the cover body 2, a shell 6 with an opening facing downward is arranged on the top inner wall of the cover body 2, and a welding mechanism is arranged on the inner side of the shell 6.

[0016] The positioning mechanism includes a cylinder 4 arranged at the top center of the base 1, and side columns 41 are arranged at equal angles on the outer walls of the upper and lower ends of the cylinder 4. The outer wall of the cylinder 4 is located inside the side column 41 and is connected to a first spring 42. The end of the first spring 42 is connected to a first piston 43 that slides with the side column 41, and the outer wall of the first piston 43 is connected to a positioning column 44. A second piston 45 that slides with the first piston 43 is arranged inside the cylinder 4, and the top of the second piston 45 is connected to a threaded rod 46 that is threadedly connected to the top of the cylinder 4.

[0017] An air hole is provided at the top of the cylinder 4 on one side of the threaded rod 46 , and an oil filling port is provided on the upper outer wall of the cylinder 4 . An oil delivery hole connected to the side column 41 is provided on the outer wall of the cylinder 4 .

[0018] The welding mechanism includes a turntable 7 arranged at the bottom end of the shell 6, and the inner wall of the shell 6 is provided with a ball bearing that fits the bottom of the turntable 7. A servo motor 71 is installed on the top inner wall of the cover body 2, and the output end of the servo motor 71 is connected to a rotating shaft 72 that penetrates into the turntable 7. A hole groove is opened on the top of the turntable 7 on the outside of the rotating shaft 72, and a rotating ring 73 is sleeved on the outside of the bottom of the rotating shaft 72. A first vortex spring 74 is connected between the rotating shaft 72 and the rotating ring 73. A fixed ring 75 located on the outside of the rotating ring 73 is fixedly provided on the inner wall of the bottom end of the turntable 7, and a second vortex spring 76 is connected between the rotating ring 73 and the fixed ring 75. Six groups of electric welding guns 711 are arranged at equal angles at the bottom of the turntable 7, and an auxiliary drive component is arranged inside the turntable 7.

[0019] The bottom of the turntable 7 is rotatably connected with six groups of rotating rods 77 at equal angles, and the six groups of rotating rods 77 are respectively arranged corresponding to the six groups of electric welding guns 711. The top of the rotating ring 73 and the outer wall of one side of the six groups of rotating rods 77 are respectively connected with a traction rope 78, the inner wall of the turntable 7 and the outer wall of the other side of the six groups of rotating rods 77 are respectively connected with a second spring 710, and the lower ends of the six groups of rotating rods 77 are respectively fixed to the upper ends of the six groups of rotating rods 77.

[0020] The bottom end of the turntable 7 is located on the outside of the six groups of rotating rods 77 and is respectively provided with movable grooves. The inner wall of the bottom end of the turntable 7 is located on one side of the traction rope 78 and is correspondingly provided with a guide wheel 79.

[0021] Working principle: When using the valve body processing and welding device, first, the flange workpiece and the valve body workpiece are sequentially sleeved on the outside of the positioning mechanism. Since the inner groove of the flange workpiece matches the inner groove of the valve body workpiece, the oil is filled through the oil filling port on the side wall of the cylinder 4. At this time, the threaded rod 46 is rotated, and the threaded rod 46 rotates downward and pushes the second piston 45. The second piston 45 squeezes the oil. Since the elastic force of the first spring 42 in the upper side column 41 is the same and smaller than the elastic force of the first spring 42 in the lower side column 41, the oil will first pass through the oil delivery hole to the three groups of side columns on the upper side synchronously. Oil is injected into the column 41, and the oil pushes the first piston 43 and pulls the first spring 42, and the first piston 43 pushes the positioning column 44 to move, and the positioning columns 44 in the upper three groups of side columns 41 first abut against the inner wall of the valve body workpiece, and similarly, the positioning columns 44 in the lower three groups of side columns 41 abut against the inner wall of the flange workpiece, so that the valve body workpiece and the flange workpiece are positioned on the same axis, avoiding misalignment of the valve body workpiece and the flange workpiece when they are connected, which affects the subsequent welding process, and vice versa, the valve body workpiece and the flange workpiece after welding can be taken out by reversing the threaded rod 46; Then, the workpiece is electrically connected to one pole of the electric welding setting body 5, and the six groups of electric welding guns 711 are electrically connected to the other pole of the electric welding setting body 5, and the ends of the six groups of electric welding guns 711 are located at equal angles at the connection between the flange workpiece and the valve body workpiece. The six groups of electric welding guns 711 divide the circular welding trajectory into six arc segments, and the angle between the ends of every two groups of electric welding guns 711 is 60°. The electric welding equipment body 5 is started, and spot welding is first performed on the six points on the circular welding trajectory. At the same time, the servo motor 71 is controlled by the controller 3 to drive the rotating shaft 72 to rotate counterclockwise. Since the elastic force of the first vortex spring 74 is less than the elastic force of the second vortex spring 76, and the first vortex spring 74 and the second vortex spring 76 are smaller than the weight of the housing 6. The rotation of the rotating shaft 72 first drives the first vortex spring 74 to rotate and deform to the maximum extent. The rotating shaft 72 starts to drive the rotating ring 73 to rotate. After the rotating ring 73 drives the second vortex spring 76 to rotate and deform to the maximum extent, it can drive the fixed ring 75 to make the turntable 7 start to rotate. At the same time, the rotating ring 73 first pulls the traction rope 78. The traction rope 78 synchronously pulls the rotating rod 77 to rotate in the movable groove through the wire wheel 79. The rotating rod 77 then pulls the second spring 710. At this time, the rotating rod 77 drives the electric welding gun 711 at the lower end to move, so that the welding heads of the six groups of electric welding guns 711 are synchronously moved outward to the welding position; Finally, the turntable 7 starts to rotate, and the turntable 7 drives the six groups of welding guns 711 to rotate. By controlling the servo motor 71, the turntable 7 is rotated indirectly. It rotates six times for the first time, and the rotation angle is 10° each time. At the moment of each rotation stop, the second vortex spring 76 and the first vortex spring 74 are reset, and drive the rotating ring 73 to rotate and reset. When the traction rope 78 has no traction force, the second spring 710 pulls the rotating rod 77 to reset, so that the welding guns 711 are reset, and the welding guns 711 perform spot welding on the welding points. Before the turntable 7 rotates again, the welding guns 711 can be opened in the same way to form six unwelded arc segments. , thereby ensuring that each point will not be affected by the heat of the adjacent points during spot welding, and the heating is more uniform. If there is still a gap between the points, the electric welding gun 711 can be indirectly rotated in the next arc segment with an angle of 60°, and the position of each stop is located at the midpoint of the arc segment between the welded points. Spot welding is performed again. The solder has a state of spreading outward after melting. Spot welding can be performed in the middle of the spot welded points, and so on, until there is no gap between the welds. The points on both sides of the next spot welding position are the positions of the last initial spot welding. The heat has cooled down and will not be affected by the heat. At the same time, the welded surface is smoother and more beautiful.

[0022] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A valve body processing and welding device, comprising a base (1), characterized in that: A cover body (2) is arranged on the top of the base (1), a controller (3) is installed on the top of the cover body (2), a positioning mechanism is arranged at the top center of the base (1), a welding equipment body (5) is installed on the top of the cover body (2), a shell (6) with an opening facing downward is arranged on the top inner wall of the cover body (2), and a welding mechanism is arranged on the inner side of the shell (6).

2. A valve body processing and welding device according to claim 1, characterized in that: The positioning mechanism comprises a cylinder (4) arranged at the top center of the base (1); side columns (41) are arranged at equal angles on the outer walls of the upper end and the lower end of the cylinder (4); the outer wall of the cylinder (4) is located inside the side column (41) and is connected to a first spring (42); the end of the first spring (42) is connected to a first piston (43) that is slidably matched with the side column (41); the outer wall of the first piston (43) is connected to a positioning column (44); a second piston (45) that is slidably matched with the second piston (45) is arranged inside the cylinder (4); and the top of the second piston (45) is connected to a threaded rod (46) that is threadedly connected to the top of the cylinder (4).

3. A valve body processing and welding device according to claim 2, characterized in that: An air hole is provided at the top of the cylinder (4) on one side of the threaded rod (46), and an oil filling port is provided on the upper outer wall of the cylinder (4). An oil delivery hole communicating with the side column (41) is provided on the outer wall of the cylinder (4).

4. The valve body processing and welding device according to claim 1, characterized in that: The welding mechanism comprises a rotating disk (7) arranged at the bottom end of a housing (6); a ball bearing which fits the bottom of the rotating disk (7) is arranged on the inner wall of the housing (6); a servo motor (71) is installed on the inner wall of the top of the cover (2); an output end of the servo motor (71) is connected to a rotating shaft (72) which penetrates the inside of the rotating disk (7); a hole groove is provided on the top of the rotating disk (7) on the outside of the rotating shaft (72); a rotating ring (73) is sleeved on the outside of the bottom of the rotating shaft (72); a first vortex spring (74) is connected between the rotating shaft (72) and the rotating ring (73); a fixed ring (75) located on the outside of the rotating ring (73) is fixedly arranged on the inner wall of the bottom end of the rotating disk (7); a second vortex spring (76) is connected between the rotating ring (73) and the fixed ring (75); six groups of electric welding guns (711) are arranged at equal angles on the bottom of the rotating disk (7); and an auxiliary driving assembly is arranged inside the rotating disk (7).

5. A valve body processing and welding device according to claim 4, characterized in that: The bottom of the rotating disk (7) is connected to six groups of rotating rods (77) for rotation at equal angles, and the six groups of rotating rods (77) are respectively arranged corresponding to the six groups of electric welding guns (711). The top of the rotating ring (73) and the outer walls of one side of the six groups of rotating rods (77) are respectively connected to traction ropes (78). The inner wall of the rotating disk (7) and the outer walls of the other side of the six groups of rotating rods (77) are respectively connected to second springs (710). The lower ends of the six groups of rotating rods (77) are respectively fixed to the upper ends of the six groups of rotating rods (77).

6. A valve body processing and welding device according to claim 5, characterized in that: The bottom end of the rotating disk (7) is located on the outside of the six groups of rotating rods (77) and is respectively provided with movable grooves. The inner wall of the bottom end of the rotating disk (7) is located on one side of the traction rope (78) and is correspondingly provided with a guide wheel (79).

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