CN113953705A

CN113953705A - Double-station welding machine

Info

Publication number: CN113953705A
Application number: CN202111411951.4A
Authority: CN
Inventors: 王震; 陈刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-01-21

Abstract

The invention belongs to the field of welding machines, and particularly relates to a double-station welding machine which comprises a machine tool, a guide rail, a first clamping mechanism, a second clamping mechanism, a first welding gun component, a second welding gun component, an electrical control box and an exhaust port, wherein the upper surface of the machine tool is fixedly connected with the guide rail, the lower surface of the first clamping mechanism, the lower surface of the second clamping mechanism and the upper surface of the guide rail are matched and slidably connected, the first welding gun component and the second welding gun component are respectively arranged above the machine tool from right to left, the exhaust port is positioned at the top of the left side of the welding machine and fixedly connected with a welding machine shell, an air vent pipeline is arranged in the first clamping mechanism, and an electric control air valve is arranged on the air vent pipeline. The survival efficiency is improved.

Description

Double-station welding machine

Technical Field

The invention belongs to the field of welding machines, and particularly relates to a double-station welding machine.

Background

Welding, also known as fusion welding, is a manufacturing process and technique for joining metals or other thermoplastic materials, such as plastics, by means of heat, high temperature or high pressure. During the welding process, the workpiece and the solder are melted to form a molten zone, and the molten pool is cooled and solidified to form the connection between the materials. In this process, pressure is also typically applied. The energy source for welding is widely varied and includes gas flame, electric arc, laser, electron beam, friction, ultrasonic, and the like. The earliest modern welding techniques appeared at the end of the 19 th century, with arc and oxygen gas welding first, and later resistance welding. In the early 20 th century, with the first and second world war, there was a great need for inexpensive and reliable connection methods for military equipment, thus promoting the development of welding technology. With the wide application of welding robots in industrial applications, researchers are still deeply researching the nature of welding and continue to develop new welding methods to further improve the welding quality.

In modern industrial production, the girth welding process is usually needed to be used to the bottom of cylindrical container, during production, the cylinder outer wall and bottom are processed respectively earlier, weld in advance and look the liquid mirror, go out side wall parts such as air inlet (liquid) mouth of pipe, then connect through the girth welding, for guaranteeing welding quality, need carry out gas detection or water detection to the work piece after the girth welding is finished in order to guarantee that welding seam department is flawless, no seepage, but most of current welding machine do not have the detection function, need transport the good work piece of welding to the check point and detect, need consume extra manpower and materials resources on the one hand, on the other hand has also greatly increased man-hour, reduced production efficiency.

Disclosure of Invention

The invention aims to provide a double-station welding machine, which solves the specific problems that most of the existing welding machines do not have a detection function, and welded workpieces need to be transported to a detection point for detection, so that on one hand, extra manpower and material resources need to be consumed, on the other hand, the working hours are greatly increased, and the survival efficiency is reduced.

In order to achieve the purpose, the invention provides the following technical scheme:

a double-station welding machine comprises a machine tool, a guide rail, a first clamping mechanism, a second clamping mechanism, a first welding gun assembly, a second welding gun assembly, an electric control box and an exhaust port, wherein the upper surface of the machine tool is fixedly connected with the guide rail, the lower surface of the first clamping mechanism, the lower surface of the second clamping mechanism and the upper surface of the guide rail are matched and slidably connected, the first welding gun assembly and the second welding gun assembly are respectively arranged above the machine tool from right to left, the first welding gun assembly and the second welding gun assembly are fixedly connected with the upper surface of a welding machine shell and are connected to the electric control box through pipelines, the exhaust port is positioned at the top of the left side of the welding machine and is fixedly connected with the welding machine shell, the first clamping mechanism comprises a first air cylinder assembly, a first multi-stage piston rod, a first clamping block and a first fixing disc, the first air cylinder assembly comprises a fixing plate and an air cylinder, the fixed plate is fixedly connected to the upper surface of the right side of the machine tool, the air cylinder is fixedly connected to the right side of the fixed plate, the piston is connected with the first multi-stage piston rod in a sliding manner, the first multi-stage piston rod is connected with the fixed plate in a sliding manner, the first multi-stage piston rod is fixedly connected with the first clamping block, by arranging the second piston rod, when the air cylinder works, the second piston rod is firstly ejected out by air pressure and then acts on the first stage piston rod after reaching a limit position, the working stroke of the air cylinder is effectively increased, the air cylinder is used for supporting large-stroke linear motion, the lower surface of the first clamping block is in sliding connection with the guide rail on the upper surface of the machine tool, the left surface of the first clamping block is provided with a cylindrical groove, the groove is in sliding connection with the first fixed disc through a bearing, and the bottom of the guide column of the first fixed disc is in sliding sealing connection with the bottom of the groove, the first fixed disc can freely rotate around the central axis on the premise of ensuring the sealing performance, an air duct is arranged in the first multi-stage piston rod, the air duct penetrates through the first fixed disc, the first clamping block, the first multi-stage piston rod and the piston to be connected with the left side of the first fixed disc and the inside of the cylinder, and an electric control air valve is arranged at the position, located at the first clamping block, of the air duct. After the work piece is welded twice, open automatically controlled pneumatic valve, directly let in the work piece with the high-pressure gas in the cylinder of left side in, pressurize a period, treat cylinder manometer registration stable back can judge whether there is the defect in the welding seam through observing whether the manometer registration descends, realized not changing under the condition of station direct airtight inspection after the welding, saved extra gas tightness inspection process, greatly reduced man-hour, promoted work efficiency.

Preferably, the second clamping mechanism comprises a second air cylinder assembly, a second multi-stage piston rod, a second clamping block and a second fixed disc, the second air cylinder assembly comprises a fixed plate and an air cylinder, the fixed plate is fixedly connected to the upper surface of the left side of the machine tool, the air cylinder is fixedly connected to the left side of the fixed plate, a piston is slidably connected in the air cylinder, the piston is fixedly connected with the second multi-stage piston rod, the second multi-stage piston rod is slidably connected with the fixed plate, the second multi-stage piston rod is fixedly connected with the second clamping block, the second clamping block is slidably connected with a guide rail on the upper surface of the machine tool, when a workpiece needs to be replaced on the machine tool, the two air cylinders can keep opposite working states, the two air cylinders cooperate with each other, so that the workpiece can automatically move on the machine tool, and can automatically move to the next station after the workpiece is processed at the position of the first welding gun assembly, a motor cavity is formed in the second clamping block, a heat dissipation window is formed above the second clamping block to dissipate heat in the motor cavity, a motor is fixedly connected in the motor cavity, a motor rotating shaft penetrates through the right side wall of the motor cavity and is in sliding connection with a penetrating position, a cylindrical groove is formed in the right side surface of the second fixing disc, four spring guide columns are arranged at the bottom of the groove and are uniformly and equidistantly distributed at the bottom of the groove, a second fixing disc is fixedly connected to the other end of each spring guide column, the fixing disc is stressed more uniformly by the four spring guide columns, the outer wall of the second fixing disc is in sliding connection with the side wall of the groove, the motor rotating shaft is fixedly connected with the bottom of the second fixing disc, the motor can drive the second fixing disc to rotate together, a cylindrical groove is formed in the right side surface of the second fixing disc, and a circular groove with the outer diameter equal to that of the cylindrical groove is formed in the bottom of the groove, the cylindrical workpiece bottom cover can be clamped into the circular groove and rotates together with the second fixed disk under the action of friction force, the first fixed disk comprises a sealing layer, a clamping layer and a guide pillar, the left surface of the sealing layer is of a conical structure, the right side of the clamping layer is of an inverted conical structure, the two surfaces can be matched with each other, the clamping layer comprises eight fan-shaped electromagnets with the same size and shape, the size of each fan-shaped electromagnet is smaller than that of a fan-shaped area of the sealing layer, the fan-shaped electromagnets are fixedly connected with the guide pillar through springs, when a workpiece is placed on a station, the left side of the workpiece bottom cover is clamped into the circular groove of the second fixed disk, a right side air cylinder pressurizes, the first fixed disk enters the inside of the workpiece under the driving of the first clamping block, then the fan-shaped electromagnets of the clamping layer are electrified, the electromagnets are displayed to be of the same magnetism, mutual repulsion force is generated, and the first fixed disk is radially expanded under the limitation of the sealing layer, produce even thrust to the work piece internal surface, the sealing layer is extruded simultaneously and is produced deformation, sealing layer side and work piece internal surface in close contact with, through mutually supporting of first fixed disk and second fixed disk, the axial fixity effect to the work piece is whole has been realized, the degree of consistency of girth welding has been promoted, make the work piece realize sealed when the prerequisite that does not have the top cap through first fixed disk simultaneously, so that carry out the gas tightness inspection to the girth welding quality of work piece, after the gas tightness inspection, the accessible closes the electro-magnet and makes first fixed disk recover, the high-pressure gas in work piece and the vent pipe spouts into the welding machine, also can make the welding waste gas in the welding machine discharge through the gas vent more soon.

Preferably, the sealing layer of first fixed disk is the rubber material, can make its deformation that produces when receiving the extrusion force of electro-magnet more obvious, has realized better leakproofness simultaneously, makes the result of gas tightness inspection more reliable, the second fixed disk is the rubber material, and second fixed disk and spring guide pillar cooperate and can play the cushioning effect when two clamp blocks press from both sides tight work piece and move, have also played the protection welding machine and not receive the impact damage when protecting work piece integrality.

Preferably, first welder subassembly includes arm and first welder, arm fixed connection is on welder shell top right side, first welder fixed connection is terminal at the arm, and first welder subassembly has obtained the high degree of freedom as power component through setting up the arm, is convenient for change the frock simultaneously, and accessible electrical control box controls the arm, realizes multiple welding process to the work piece lateral wall, like spot welding, girth welding or resistance welding of seeing liquid mirror, gas-liquid import and export etc. smallclothes part.

Preferably, the second welding gun assembly comprises a hydraulic lifting frame and a second welding gun, two feet of the hydraulic lifting frame are fixed to the front side and the rear side of the welding machine, the second welding gun is fixedly connected to the middle of the hydraulic lifting frame, and the axis of the second welding gun is perpendicular to the horizontal plane. The second welding gun component is matched with the second clamping block, the girth welding function is realized, and meanwhile, the second welding gun component is matched with the first welding gun component, so that the double-station double functions of the whole welding machine are realized, the effect of one machine with multiple purposes is achieved, the working efficiency is improved, and the time for replacing workpieces among different machine tools is saved.

Preferably, the two welding slag shovels are fixedly connected to the two sides of the first clamping block and the two sides of the second clamping block and the sliding connection position of the guide rail respectively, and in the process that the clamping blocks move, the welding slag shovels can clean up welding slag on the guide rail, so that the running accuracy and stability of a welding machine are prevented from being reduced due to accumulation of the welding slag on the guide rail, and hidden dangers are brought to the machining process.

Compared with the prior art, the invention has the beneficial effects that:

1. after the work piece is welded twice, open automatically controlled pneumatic valve, directly let in the work piece with the high-pressure gas in the cylinder of left side in, pressurize a period, treat cylinder manometer registration stable back can judge whether there is the defect in the welding seam through observing whether the manometer registration descends, realized not changing under the condition of station direct airtight inspection after the welding, saved extra gas tightness inspection process, greatly reduced man-hour, promoted work efficiency.

2. When a workpiece is placed on a station, the left side of a bottom cover of the workpiece is clamped into a circular groove of a second fixing disc, a right cylinder is used for pressurizing, a first fixing disc enters the workpiece under the driving of a first clamping block, then a fan-shaped electromagnet of a clamping layer is electrified, the electromagnets are displayed to be of the same magnetism and generate mutual repulsion force, the first fixing disc is radially expanded along the first fixing disc under the limitation of a sealing layer to generate uniform thrust on the inner surface of the workpiece, the sealing layer is extruded to generate deformation, the side surface of the sealing layer is tightly contacted with the inner surface of the workpiece, the axial fixing effect on the whole workpiece is realized through the mutual matching of the first fixing disc and the second fixing disc, the uniformity of girth welding is improved, meanwhile, the workpiece is sealed on the premise of no top cover through the first fixing disc, so that the girth welding quality of the workpiece is subjected to air tightness inspection, after the air tightness inspection is finished, the accessible closes the electro-magnet and makes first fixed disk recover, and the high-pressure gas in work piece and the vent pipe spouts into the welding machine in, also can make the welding waste gas in the welding machine discharge through the gas vent more fast.

3. The second welding gun component is matched with the second clamping block, the girth welding function is realized, and meanwhile, the second welding gun component is matched with the first welding gun component, so that the double-station double functions of the whole welding machine are realized, the effect of one machine with multiple purposes is achieved, the working efficiency is improved, and the time for replacing workpieces among different machine tools is saved.

Drawings

FIG. 1 is a schematic view of the overall mechanism of the present invention, excluding the housing;

FIG. 2 is a schematic structural diagram of a top view of the present invention;

FIG. 3 is an enlarged view of the invention at I in FIG. 2;

FIG. 4 is a left side view of the first fixed disk of the present invention;

fig. 5 is a schematic structural view of a left side view of the first fixed disk of the present invention.

In the figure: the welding machine comprises a machine tool 1, a guide rail 2, a first clamping mechanism 3, a first cylinder assembly 31, a first multi-stage piston rod 32, a first clamping block 33, a first fixed disc 34, a sealing layer 341, a clamping layer 342, a guide pillar 343, an electromagnet 344, a ventilation pipeline 35, an electric control air valve 36, a second clamping mechanism 4, a second air cylinder assembly 41, a second multi-stage piston rod 42, a second clamping block 43, a second fixed disc 44, a motor cavity 45, a heat dissipation window 46, a spring guide pillar 47, a first welding gun assembly 5, a mechanical arm 51, a first welding gun 52, a second welding gun assembly 6, a hydraulic lifting frame 61, a second welding gun 62, an electric control box 7, an air outlet 8 and a welding slag shovel 9.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 5, in an embodiment of the present invention, a double-station welding machine includes a machine tool 1, a guide rail 2, a first clamping mechanism 3, a second clamping mechanism 4, a first welding gun assembly 5, a second welding gun assembly 6, an electrical control box 7 and an exhaust port 8, the upper surface of the machine tool 11 is fixedly connected with the guide rail 22, the lower surface of the first clamping mechanism 3 and the lower surface of the second clamping mechanism 4 are both matched and slidably connected with the upper surface of the guide rail 22, the first welding gun assembly 5 and the second welding gun assembly 6 are respectively arranged from right to left above the machine tool 11, the first welding gun assembly 5 and the second welding gun assembly 6 are fixedly connected with the upper surface of a welding machine housing and are connected to the electrical control box 7 through pipelines, the exhaust port 8 is located at the top of the left side of the welding machine and is fixedly connected with the welding machine housing, the first clamping mechanism 3 includes a first cylinder assembly 31, a first multi-stage piston rod 32, a second multi-stage piston rod 32, The first clamping block 33 and the first fixing disc 34, the first cylinder assembly 31 comprises a fixing plate and a cylinder, the fixing plate is fixedly connected to the upper surface of the right side of the machine tool 1, the cylinder is fixedly connected to the right side of the fixing plate, the cylinder is connected with a piston in a sliding manner, the piston is fixedly connected with the first multi-stage piston rod 32, the first multi-stage piston rod 32 is connected with the fixing plate in a sliding manner, the surface of the right side of the first clamping block 33 is fixedly connected with the first multi-stage piston rod 32, the piston rod is of a multi-stage structure, when the cylinder works, the second multi-stage piston rod is firstly ejected out by air pressure and then used as the first multi-stage piston rod after reaching a limit position, the working stroke of the cylinder is effectively increased, the lower surface of the first clamping block 33 is connected with the guide rail 22 on the upper surface of the machine tool 11 in a sliding manner, a cylindrical groove is formed in the surface of the left side of the first clamping block 33, the groove is connected with the first fixing disc 34 in a sliding manner through a bearing, and the bottom of the guide pillar 343 of the first fixing disc 34 is connected with the bottom of the groove in a sliding and sealing manner, the first fixed disk 34 can freely rotate around the central axis on the premise of ensuring the sealing performance, the first multi-stage piston rod 32 is internally provided with a ventilation pipeline 35, the ventilation pipeline 35 penetrates through the first fixed disk 34, the first clamping block 33, the first multi-stage piston rod 32 and the piston to be connected with the left side of the first fixed disk 34 and the inside of the cylinder, and the ventilation pipeline 35 is provided with an electric control air valve 36 at the position of the first clamping block 33. After the workpiece is welded twice, the electric control air valve 36 is opened, high-pressure gas in the right cylinder is directly introduced into the workpiece, pressure is maintained for a period of time, after the reading of a cylinder pressure gauge is stable, whether a welding seam has a defect or not can be judged by observing whether the reading of the pressure gauge is reduced, direct airtight inspection under the condition that a station is not changed after welding is finished is realized, additional air tightness inspection procedures are saved, working hours are greatly reduced, and the working efficiency is improved.

As an embodiment of the present invention, the second clamping mechanism 4 includes a second cylinder assembly 41, a second multi-stage piston rod 42, a second clamping block 43 and a second fixing plate 44, the second cylinder assembly 41 includes a fixing plate and a cylinder, the fixing plate is fixedly connected to the upper surface of the left side of the machine tool 11, the cylinder is fixedly connected to the left side of the fixing plate, the cylinder is slidably connected with a piston, the piston is fixedly connected with the second multi-stage piston rod 42, the second multi-stage piston rod 42 is slidably connected with the fixing plate, the second multi-stage piston rod 42 is fixedly connected with the second clamping block 43, the second clamping block 43 is slidably connected with the guide rail 22 of the upper surface of the machine tool 11, when a workpiece needs to be replaced on the machine tool 11, the two cylinders can maintain opposite working states, the two cylinders cooperate to realize automatic movement of the workpiece on the machine tool 11, and can automatically move to the next station after the workpiece is processed on the first welding gun assembly 5, a motor cavity 45 is arranged in the second clamping block 43, a heat dissipation window 46 is arranged above the second clamping block 43 to dissipate heat in the motor cavity 45, a motor is fixedly connected in the motor cavity 45, a motor rotating shaft penetrates through the right side wall of the motor cavity 45 and is in sliding connection with a penetrating position, a cylindrical groove is arranged on the right side surface of the second fixing disc 44, four spring guide columns 47 are arranged at the bottom of the groove, the four spring guide columns 47 are uniformly and equidistantly distributed at the bottom of the groove, the other end of each spring guide column 47 is fixedly connected with the second fixing disc 44, the four spring guide columns 47 enable the fixing discs to be stressed more uniformly, the outer wall of the second fixing disc 44 is in sliding connection with the groove side wall, the motor rotating shaft is fixedly connected with the bottom of the second fixing disc 44, the motor can drive the second fixing disc 44 to rotate together, the right side surface of the second fixing disc 44 is provided with the cylindrical groove, and the bottom of the groove is provided with a circular groove with the same outer diameter as the cylindrical groove, the bottom cover of the cylindrical workpiece can be clamped into the circular groove and can rotate together with the second fixing disk 44 under the action of friction force, the first fixing disk 34 comprises a sealing layer 341, a clamping layer 342 and a guide post 343, the left side surface of the sealing layer 341 is in a conical structure, the right side of the clamping layer 342 is in an inverted conical structure, the two surfaces can be matched with each other, the clamping layer 342 comprises eight fan-shaped electromagnets 344 with the same size and shape, the size of the fan-shaped electromagnet 344 is smaller than that of the fan-shaped area of the sealing layer 341, the fan-shaped electromagnet 344 is fixedly connected with the guide post 343 through a spring, when the workpiece is placed on a station, the left side of the bottom cover of the workpiece is clamped into the circular groove of the second fixing disk 44, a right side air cylinder is pressurized, the first fixing disk 34 enters the inside of the workpiece under the driving of the first clamping block 33, then the fan-shaped electromagnets 344 of the clamping layer 342 are electrified, the electromagnets 344 have the same magnetism, and generate mutual repulsion force, expand radially along first fixed disk 34 under the restriction of sealing layer 341, produce even thrust to the work piece internal surface, sealing layer 341 produces deformation by the extrusion simultaneously, sealing layer 341 side and work piece internal surface in close contact with, through mutually supporting of first fixed disk 34 and second fixed disk 44, the holistic horizontal axial fixity effect of work piece has been realized, the degree of consistency of girth welding has been promoted, make the work piece realize sealed when not having under the prerequisite of top cap through first fixed disk 34 simultaneously, so that carry out the gas tightness inspection to the girth welding quality of work piece, after the gas tightness inspection, the accessible closes electro-magnet 344 and makes first fixed disk 34 recover, the high-pressure gas in work piece and the vent pipe 35 spouts into the welding machine, also can make the welding waste gas in the welding machine discharge through gas vent 8 more soon.

As an embodiment of the present invention, the sealing layer 341 of the first fixing plate 34 is made of rubber, so that the deformation of the first fixing plate when the sealing layer is pressed by the electromagnet 344 is more obvious, and better sealing performance is achieved, so that the result of the air tightness inspection is more reliable, the second fixing plate 44 is made of rubber, and the second fixing plate 44 and the spring guide post 47 are matched to play a role in buffering when the two clamping blocks clamp the workpiece to move, so as to protect the integrity of the workpiece and protect the welding machine from being damaged by impact.

According to one embodiment of the invention, the first welding gun assembly 5 comprises a mechanical arm 51 and a first welding gun 52, the mechanical arm 51 is fixedly connected to the right side of the top of the welding machine shell, the first welding gun 52 is fixedly connected to the tail end of the mechanical arm 51, the first welding gun assembly 5 obtains high degree of freedom by arranging the mechanical arm 51 as a power assembly, meanwhile, the tool is convenient to replace, and the mechanical arm 51 can be controlled through the electric control box 7, so that various welding processes of the side wall of a workpiece, such as spot welding, girth welding or resistance welding of small parts such as a liquid sight glass, a gas-liquid inlet and outlet and the like, can be realized.

As an embodiment of the invention, the second welding gun assembly 6 comprises a hydraulic lifting frame 61 and a second welding gun 62, two feet of the hydraulic lifting frame 61 are fixed on the front side and the rear side of the welding machine, the second welding gun 62 is fixedly connected in the middle of the hydraulic lifting frame 61, and the axis of the second welding gun 62 is vertical to the horizontal plane. The second welding gun component 6 is matched with the second clamping block 43 to realize the girth welding function, and is matched with the first welding gun component 5 to realize the double-station double functions of the whole welding machine, so that the effect of one machine with multiple purposes is achieved, the working efficiency is improved, and the time for replacing workpieces among different machine tools is saved.

As an embodiment of the invention, two welding slag shovels 9 are fixedly connected to the sliding connection positions of the two sides of the first clamping block 33 and the second clamping block 43 and the guide rail 22 respectively, and in the moving process of the clamping blocks, the welding slag shovels 9 can clean the welding slag on the guide rail 22, so that the reduction of the operation precision and stability of the welding machine caused by the accumulation of the welding slag on the guide rail 22 is prevented, and hidden troubles are brought to the machining process.

The working principle is as follows: when a workpiece is placed on a station, the left side of the bottom cover of the workpiece is clamped into the circular groove of the second fixing disc 44, the cylinder on the right side is pressurized, the first fixing disc 34 enters the inside of the workpiece under the driving of the first clamping block 33, the sector-shaped electromagnets 344 of the clamping layer 342 are then energized, the electromagnets 344, which are shown as being of the same magnetic nature, produce opposing forces with respect to each other, expand radially along the first mounting plate 34 under the restriction of the sealing layer 341, uniform thrust is generated on the inner surface of the workpiece, the sealing layer 341 is extruded to deform, the side surface of the sealing layer 341 is tightly contacted with the inner surface of the workpiece, the first fixing disc 34 and the second fixing disc 44 are matched with each other, so that the axial fixing effect on the whole workpiece is realized, the ring welding uniformity is improved, meanwhile, the first fixing disc 34 is used for sealing the workpiece on the premise of no top cover, so that the subsequent gas tightness inspection of the girth welding quality of the workpiece is facilitated; then, the workpiece is welded on the first welding gun component 5, after welding, the right cylinder is pressurized, the left cylinder is depressurized, the first clamping block 33 and the second clamping block 43 drive the workpiece to move leftwards to the second welding gun component 6 for girth welding, the motor in the motor cavity 45 is started, the cylinders on the two sides are pressurized, the workpiece is driven to rotate axially through the resistance action of the first fixing disc 34 and the second fixing disc 44, the girth welding process is completed, in order to ensure the welding quality, the rotation angle of the workpiece is not less than 360 degrees from the start of the second welding gun 62 to the close of the second welding gun, after the girth welding is completed, the motor is closed, an air (liquid) inlet and outlet of a cylindrical shell of the workpiece is blocked, the electric control air valve 36 is opened, high-pressure air in the right cylinder is directly introduced into the workpiece, pressure maintaining is carried out for a period of time, and after the indication of a pressure gauge of the cylinder is stable, whether the welding seam has defects can be judged by observing whether the indication of the pressure gauge is reduced or not, the airtightness inspection is directly carried out under the condition that the station is not changed after the welding is finished, after the airtightness inspection is finished, the electromagnet 344 is closed to restore the first fixed disk 34, the two cylinders are reset, the workpiece and high-pressure gas in the vent pipeline 35 are scattered and sprayed into the welding machine, welding waste gas in the welding machine is discharged through the exhaust port 8 more quickly, then the workpiece can be taken down, and the machining is finished.

The technical features of the above embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist, the above embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but cannot therefore be understood as a limitation to the scope of the invention; it should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which are within the protection scope of the present invention; therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A double-station welding machine comprises a machine tool (1), a guide rail (2), a first clamping mechanism (3), a second clamping mechanism (4), a first welding gun component (5), a second welding gun component (6), an electrical control box (7) and an exhaust port (8), wherein the upper surface of the machine tool (1) is fixedly connected with the guide rail (2), the lower surface of the first clamping mechanism (3), the lower surface of the second clamping mechanism (4) and the upper surface of the guide rail (2) are matched and slidably connected, the upper part of the machine tool (1) is respectively provided with the first welding gun component (5) and the second welding gun component (6) from right to left, the first welding gun component (5) and the second welding gun component (6) are fixedly connected with the upper surface of a welding machine shell and are connected to the electrical control box (7) through pipelines, the exhaust port (8) is positioned at the top of the left side of the welding machine and is fixedly connected with the welding machine shell, the method is characterized in that: the first clamping mechanism (3) comprises a first cylinder assembly (31), a first secondary piston rod (32), a first clamping block (33) and a first fixed disc (34), the first cylinder assembly (31) comprises a fixing plate and a cylinder, the fixing plate is fixedly connected to the upper surface of the right side of the machine tool (1), the cylinder is fixedly connected to the right side of the fixing plate, the piston is connected to the first secondary piston rod (32) in the cylinder in a sliding manner, the piston is fixedly connected to the first secondary piston rod (32), the first secondary piston rod (32) is connected to the fixing plate in a sliding manner, the first secondary piston rod (32) is connected to the first clamping block (33) in a sliding manner, the lower surface of the first clamping block (33) is connected to the guide rail (2) on the upper surface of the machine tool (1) in a sliding manner, a cylindrical groove is formed in the surface of the left side of the first clamping block (33), and the groove is connected to the first fixed disc (34) in a sliding manner through a bearing, the bottom of the guide column (343) of the first fixed disc (34) is connected with the bottom of the groove in a sliding and sealing mode, a ventilation pipeline (35) is arranged in the first secondary piston rod (32), the ventilation pipeline (35) penetrates through the first fixed disc (34), the first clamping block (33), the first secondary piston rod (32) and the piston to be connected with the left side of the first fixed disc (34) and the inside of the cylinder, and an electric control air valve (36) is arranged at the position, located on the first clamping block (33), of the ventilation pipeline (35).

2. The double station welder according to claim 1, characterized in that: the second clamping mechanism (4) comprises a second air cylinder assembly (41), a second secondary piston rod (42), a second clamping block (43) and a second fixing disc (44), the second air cylinder assembly (41) comprises a fixing plate and an air cylinder, the fixing plate is fixedly connected to the upper surface of the left side of the machine tool (1), the air cylinder is fixedly connected to the left side of the fixing plate, a piston is connected in the air cylinder in a sliding mode, the piston is fixedly connected with the second secondary piston rod (42), the second secondary piston rod (42) is connected with the fixing plate in a sliding mode, the second secondary piston rod (42) is fixedly connected with the second clamping block (43), the second clamping block (43) is connected with a guide rail (2) on the upper surface of the machine tool (1) in a sliding mode, a motor cavity (45) is formed in the second clamping block (43), and a heat dissipation window (46) is formed above the second clamping block (43), the motor is fixedly connected in the motor cavity (45), a motor rotating shaft penetrates through the right side wall of the motor cavity (45) and is in sliding connection with a penetrating position, a cylindrical groove is formed in the surface of the right side, four spring guide pillars (47) are arranged at the bottom of the groove, the four spring guide pillars (47) are uniformly and equidistantly distributed at the bottom of the groove, a second fixing disc (44) is fixedly connected to the other end of each spring guide pillar (47), the outer wall of the second fixing disc (44) is in sliding connection with the side wall of the groove, the motor rotating shaft is fixedly connected with the bottom of the second fixing disc (44), a cylindrical groove is formed in the surface of the right side of the second fixing disc (44), and a circular groove with the outer diameter equal to that of the cylindrical groove is formed in the bottom of the cylindrical groove; the first fixing disc (34) comprises a sealing layer (341), a clamping layer (342) and a guide post (343), the left side surface of the sealing layer (341) is in a conical structure, the right side of the clamping layer (342) is in an inverted conical structure, the sealing layer (341) and the clamping layer (342) can be matched with each other, the clamping layer (342) comprises eight fan-shaped electromagnets (344) with the same size and shape, the size of each electromagnet (344) is smaller than that of a fan-shaped area of the sealing layer (341), and the electromagnets (344) are fixedly connected with the guide post (343) through springs.

3. The double station welder according to claim 2, characterized in that: the sealing layer (341) of the first fixed tray (34) is made of rubber, and the second fixed tray (44) is made of rubber.

4. The double station welder according to claim 1, characterized in that: the first welding gun assembly (5) comprises a mechanical arm (51) and a first welding gun (52), the mechanical arm (51) is fixedly connected to the right side of the top of the welding machine shell, and the first welding gun (52) is fixedly connected to the tail end of the mechanical arm (51).

5. The double station welder according to claim 1, characterized in that: the second welding gun assembly (6) comprises a hydraulic lifting frame (61) and a second welding gun (62), two feet of the hydraulic lifting frame (61) are fixed on the front side and the rear side of the welding machine, the second welding gun (62) is fixedly connected to the middle of the hydraulic lifting frame (61), and the axis of the second welding gun (62) is perpendicular to the horizontal plane.

6. The double station welder according to claim 2, characterized in that: two welding slag shovels (9) are fixedly connected to the sliding connection positions of the two sides of the first clamping block (33) and the second clamping block (43) and the guide rail (2) respectively.