CN106735810A - Automatic butt-welding device - Google Patents

Abstract

The invention relates to a butt welding device, especially an automatic butt welding device, which includes a rotary table, a clamping device, a welding fixture, a rotary drive device, a mechanical arm and a butt welding device; the rotary table is movably mounted on a rotary platform, The rotary table is connected with the rotary drive device, the rotary drive device drives the rotary table to rotate, the clamping device is installed on the rotary table, the clamping device clamps the welding fixture, the welding fixture clamps the welding assembly, and the mechanical arm is located on the rotary table On one side of the machine, a butt welding device is installed on the robotic arm. The automatic butt welding device provided by the invention has high degree of automation, wide application range, convenient and quick replacement of welding fixtures, high welding efficiency and good welding quality.

Description

Automatic butt welding device

technical field

The invention relates to a butt welding device, in particular to an automatic butt welding device.

Background technique

The shell of the heat exchanger is a cuboid, with flange joints at both ends. The flange joint and the shell of the heat exchanger need to be welded at several points first to fix the flange joint and the shell of the heat exchanger, and then melt the nano Nickel powder for caulk welding. The existing method uses TIG (non-melting inert gas tungsten shielded welding) welding for fixing, but when the product is TIG welded, whether it is manual welding or machine welding, it will cause weld penetration due to the thin wall thickness of the base metal of the product itself. There are many scraps and production costs are increased, so it is necessary to change the welding method. Since each heat exchanger requires front and back welding, the workload is heavy, and the efficiency of manual welding is too low. Machine welding also requires manual turning of the heat exchanger, and there are many types of heat exchangers, requiring a large number of different fixtures, high cost, Efficiency gains are limited.

Contents of the invention

In order to solve the above problems, the present invention provides an automatic butt welding device that is not easy to weld through and fully automatic welding. The copper electrode is used to pressurize and melt weld the flange joint and the heat exchanger shell. The specific technical solution is:

The automatic butt welding device includes a rotary table, a clamping device, a welding fixture, a rotary driving device, a mechanical arm and a butt welding device; Drive the rotary table to rotate, the clamping device is installed on the rotary table, the clamping device clamps the welding fixture, the welding fixture clamps the welding assembly, the mechanical arm is located on one side of the rotary platform, and the mechanical arm is equipped with a butt welding device .

Both ends of the turntable are equipped with a rotating shaft, the rotating shaft is installed on a bearing seat, the bearing seat is fixed on the top of the rotating stand, the rotating shaft is connected with a rotating drive device, and the rotating table rotates around the rotating shaft.

The rotary driving equipment includes a rack, a gear and a rotary cylinder; the gear is fixed on the rotating shaft, the rack is movably installed under the gear, the rack is meshed with the gear, and one end of the rack is connected to the piston rod of the rotary cylinder , the rotary cylinder is fixed on the rotary platform.

The rotary driving device includes a motor and a reducer, and the reducer is connected to the motor and the rotating shaft respectively.

The clamping device includes a clamping cylinder, a connecting plate and a pressing plate; one end of the pressing plate is provided with a pressing hole, the other end is provided with a pressure head, and the middle is provided with a connection hole, and the pressure head is pressed on the welding fixture; There are four clamping cylinders, which are symmetrically fixed on the rotary table. The clamping cylinder is equipped with a lower fixing plate, and the lower fixing plate is provided with a connecting hole. The end of the clamping piston rod of the clamping cylinder is equipped with a The pressure plate is connected with the fixed plate, and the pressure plate connecting plate is movably connected with the pressing hole of the pressure plate through the shaft, one end of the connecting plate is movably connected with the connecting hole in the middle of the pressure plate through the shaft, and the other end of the connecting plate is connected with the lower fixed plate through the shaft. The connecting holes are movably connected; the pressing plate presses the welding fixture on the rotary table through the clamping cylinder.

The bottom of the welding fixture is provided with four fixture connecting plates, the clamping connecting plates are symmetrically fixed on the bottom of the welding fixture, and the pressure head is pressed against the clamping connecting plates.

The welding assembly is located at the center of the welding fixture and directly above the rotating shaft.

The butt welding device includes a welding cylinder, a push plate, a pressure regulating valve and a resistance welding head; the resistance welding head is fixed on the push plate, the push plate is fixed on the welding cylinder, and the welding cylinder is fixed on the welding frame At the top, the welding frame is fixed at the end of the mechanical arm; there is a guide rail inside the welding frame, and the push plate is located inside the welding frame and is movably mounted on the guide rail through a linear bearing; the pressure regulating valve is connected with the welding cylinder .

There are two resistance welding heads, which are symmetrically fixed on the push plate.

The rotary table can rotate 360 degrees. When the heat exchanger is installed on the rotary table through the welding fixture, the mechanical arm drives the welding device to weld one side of the heat exchange, and then the rotary table rotates 180 degrees, which is convenient for the mechanical arm to weld the heat exchanger on the other side. Weld on one side.

The welding device is equipped with a welding cylinder, which provides the pressing force during welding, and the size of the pressing force is adjusted by the pressure regulating valve. The resistance welding head is connected with the welding cylinder through the push plate, and the push plate is movably installed on the guide rail through the linear bearing, and the push plate transmits the radial force received during welding to the guide rail to protect the welding cylinder.

The mechanical arm has six degrees of freedom and can move freely. When the rotary table rotates, the mechanical arm drives the welding device to move backward to prevent interference. After the rotation is completed, the mechanical arm moves to the top of the welding assembly for welding. The positioning is accurate and can change according to the force Keep the position constant to facilitate the application of pressure during welding.

The rotary driving device uses a rotating cylinder to drive the rack, the rack drives the gear, and the gear drives the rotating shaft to rotate. Since the front and back are usually welded, it only needs to rotate 180 degrees. Therefore, with the cylinder, only the initial state of the cylinder and the piston are used. In the state of extending to the maximum stroke, the structure is relatively simple, the cost is low, and the rotation speed is fast.

Some heat exchangers need to be welded on all four sides. At this time, the rotary drive device adopts a motor and a reducer, which can be set at any angle, and multiple stop points can be set to improve the application range of the automatic butt welding device.

Welding fixtures are designed and manufactured according to different heat exchangers, but they all use the same fixture connecting plate, and the installation position of the fixture connecting plate at the bottom of the welding fixture is the same, which is convenient for the welding fixture to be installed on the rotary table. The welding fixtures are equipped with cylinders for automatic clamping.

The fixture device provides clamping force through four clamp cylinders. When changing the welding fixture, open the clamping cylinder, replace the welding fixture, close the clamping cylinder, and press the welding fixture on the rotary table. It is very convenient to use and does not need to be adjusted. Tedious loading and unloading.

The welding assembly is located in the center of the welding fixture and directly above the rotating shaft, which reduces the eccentric moment formed during welding, helps to ensure that the position of the rotary table does not change during welding, and improves welding quality.

There are two resistance welding heads symmetrically, which can weld two welding points at one time, and the welding efficiency is high.

When working, select the relevant welding fixture according to the heat exchanger model. When the rotary table is in a horizontal state, start the clamping cylinder, the clamping piston rod of the clamping cylinder retracts, the piston rod fixing plate at the end of the clamping piston rod drives one end of the pressure plate to move down, and the pressure head at the other end of the pressure plate lifts up. Since the connecting plate is movably connected with the lower fixing plate and the pressing plate through the shaft, the pressing plate moves toward the clamping piston rod as a whole when the clamping piston rod is retracted, which facilitates the installation or removal of the welding fixture. Place the welding jig, start the jig cylinder, move the clamping piston rod upwards, and drive the pressure plate to compress the welding jig. Fast and convenient replacement of welding fixtures.

Adjust the pressure of the pressure regulating valve according to the model of the heat exchanger to provide a suitable welding pressure.

Select the corresponding welding program in the control system, place the welding assembly on the welding fixture, start the cylinder on the welding fixture, clamp the welding assembly, the mechanical arm drives the welding device to move above the welding assembly, start the welding cylinder, and turn the resistance welding head Press on the welding assembly, the mechanical arm keeps the position unchanged, the welding cylinder provides the pressing force, the resistance welding head performs welding, the welding is completed, the mechanical arm drives the welding device to move, the other side of the welding fixture faces upward, and the mechanical arm drives the welding assembly Move over the soldered component and solder. After the welding is completed, the mechanical arm drives the welding device to move, avoiding the rotation range of the welding fixture and the rotary table, the rotary cylinder is activated, the rotary table is turned to a horizontal state, the cylinder on the welding fixture is activated, and the welding assembly is released.

Compared with the prior art, the present invention has the following beneficial effects:

The automatic butt welding device provided by the invention has high degree of automation, wide application range, convenient and quick replacement of welding fixtures, high welding efficiency and good welding quality.

Description of drawings

Fig. 1 is the front view of the present invention;

Fig. 2 is a left side view of the present invention.

detailed description

The specific embodiment of the present invention will now be described in conjunction with the accompanying drawings.

As shown in Figures 1 and 2, the automatic butt welding device includes a rotary table 3, a clamping device, a welding fixture, a rotary drive device, a mechanical arm 6 and a butt welding device; the rotary table 3 is movably installed on the rotary table 1 Above, the rotary table 3 is connected with the rotary drive device, and the rotary drive device drives the rotary table 3 to rotate. The clamping device is installed on the rotary table 3, and the clamping device clamps the welding jig, and the welding jig clamps the welding assembly. The arm is located at one side of the rotating platform 1, and the butt welding device is installed on the mechanical arm.

Both ends of the turntable 3 are equipped with a rotating shaft 44, the rotating shaft 44 is installed on the bearing block 2, and the bearing block 2 is fixed on the top of the rotating stand 1, and the rotating shaft 44 is connected with a rotating drive device, and the rotating shaft 44 The stage 3 rotates about the rotation axis 44 .

The rotary drive equipment includes a rack 41, a gear 42 and a rotary cylinder 43; the gear 42 is fixed on the rotating shaft 44, the rack 41 is movably installed below the gear 42, the rack 41 meshes with the gear 42, and the rack 41 is engaged with the gear 42. One end of 41 is connected with the piston rod of rotary cylinder 43, and described rotary cylinder 43 is fixed on the rotary platform 1.

The clamping device includes a clamping cylinder, a connecting plate 54 and a pressing plate 53; one end of the pressing plate 53 is provided with a pressing hole, the other end is provided with a pressure head, and the middle is provided with a connection hole, and the pressure head is pressed against the welding fixture. Above; the clamping cylinder is provided with four, symmetrically fixed on the rotary table 3, the clamping cylinder is equipped with a lower fixing plate 55, the lower fixing plate 55 is provided with a connection hole, the clamping of the clamping cylinder The end of the piston rod 51 is equipped with a pressing plate connecting plate 52, the pressing plate connecting plate 52 is movably connected with the pressing hole of the pressing plate 53 through a shaft, and one end of the connecting plate 54 is movably connected with the connecting hole in the middle of the pressing plate 53 through the shaft, The other end of the connecting plate 54 is movably connected with the connecting hole of the lower fixing plate 55 through a shaft;

The bottom of the welding fixture is provided with four fixture connecting plates, the clamping connecting plates are symmetrically fixed on the bottom of the welding fixture, and the pressure head is pressed against the clamping connecting plates.

The welding assembly is located at the center of the welding fixture and directly above the rotating shaft 44 .

The butt welding device includes a welding cylinder 71, a push plate 73, a pressure regulating valve and a resistance welding head 74; the resistance welding head 74 is fixed on the push plate 73, and the push plate 73 is fixed on the welding cylinder 71, and the welding head 73 is fixed on the welding cylinder 71. The welding cylinder 71 is fixed on the top of the welding frame 75, and the welding frame 75 is fixed on the end of the mechanical arm; the inside of the welding frame 75 is provided with a guide rail 72, and the push plate 73 is located inside the welding frame 75, and moves through a linear bearing Installed on the guide rail 72; the pressure regulating valve is connected with the welding cylinder 71.

There are two resistance welding heads 74 , which are symmetrically fixed on the push plate 73 .

When working, select the relevant welding fixture according to the heat exchanger model. When the rotary table is in the horizontal state, start the clamping cylinder, the clamping piston rod 51 of the clamping cylinder retracts, the piston rod fixing plate 52 at the end of the clamping piston rod 51 drives one end of the pressure plate 53 to move downward, and the pressure head at the other end of the pressure plate 53 lift up. Since the connecting plate 54 is movably connected with the lower fixing plate 55 and the pressing plate 53, the pressing plate 53 moves to the clamping piston rod 51 as a whole when the clamping piston rod 51 retracts, which facilitates the installation or removal of the welding fixture. Place the welding jig, start the jig cylinder, and move the clamping piston rod 51 upwards to drive the pressing plate 53 to compress the welding jig. Fast and convenient replacement of welding fixtures.

Adjust the pressure of the pressure regulating valve according to the model of the heat exchanger to provide a suitable welding pressure.

Select the corresponding welding program in the control system, place the welding assembly on the welding fixture, the cylinder on the welding fixture starts to clamp the welding assembly, the mechanical arm drives the welding device to move above the welding assembly, the welding cylinder 71 starts, and the resistance welding The head 74 is pressed on the welding assembly, the mechanical arm keeps the position unchanged, the welding cylinder provides the pressing force, the resistance welding head 74 performs welding, and the welding is completed, the mechanical arm drives the welding device to move, the other side of the welding fixture faces upward, and the mechanical arm Drive the welding assembly to move above the welding assembly for welding. After the welding is completed, the mechanical arm drives the welding device to move, avoiding the rotation range of the welding fixture and the rotary table 3, the rotary cylinder is activated, the rotary table 3 is turned over to a horizontal state, the cylinder on the welding fixture is activated, and the welding assembly is released.

Claims (9)

1. automatic butt-welding device, it is characterised in that including turntable（3）, clamping device, weld jig, rotating driving device, machine Tool arm（6）And butt-weld device；The turntable（3）It is movably arranged on rotary stand（1）On, turntable（3）Filled with rotation driving Connection is put, rotating driving device is rotated platform（3）Rotation, the clamping device is arranged on turntable（3）On, clamping device folder Tight weld jig, weld jig clamps weld assembly, and the mechanical arm is located at rotary stand（1）Side, be equipped with mechanical arm Butt-weld device.

2. automatic butt-welding device according to claim 1, it is characterised in that the turntable（3）Two ends equipped with rotation Axle（44）, rotary shaft（44）Installed in bearing block（2）On, bearing block（2）It is fixed on rotary stand（1）Top, the rotation Axle（44）It is connected with rotating driving device, the turntable（3）Around rotary shaft（44）Rotation.

3. automatic butt-welding device according to claim 1 and 2, it is characterised in that the rotation driving equipment includes tooth bar （41）, gear（42）And rotary cylinder（43）；The gear（42）It is fixed on rotary shaft（44）On, the tooth bar（41）Activity peace Mounted in gear（42）Lower section, tooth bar（41）With gear（42）Engagement, tooth bar（41）One end and rotary cylinder（43）Piston rod Connection, the rotary cylinder（43）It is fixed on rotary stand（1）On.

4. automatic butt-welding device according to claim 1 and 2, it is characterised in that the rotating driving device includes motor And reductor, the reductor respectively with motor and rotary shaft（44）Connection.

5. automatic butt-welding device according to claim 1, it is characterised in that the clamping device includes clamping cylinder, even Fishplate bar（54）And pressing plate（53）；The pressing plate（53）One end be provided with hold-down apertures, the other end is provided with pressure head, and centre is provided with connection Hole, the pressure head is pressed on weld jig；The clamping cylinder is provided with four, is symmetrically fixed on turntable（3）On, clamping cylinder It is upper that bottom plate is housed（55）, the bottom plate（55）It is provided with connecting hole, the clamping piston bar of the clamping cylinder（51） End connect fixed board equipped with pressing plate（52）, the press plate connection board（52）By axle and pressing plate（53）Hold-down apertures be flexibly connected, The connecting plate（54）One end pass through axle and pressing plate（53）Middle connecting hole is flexibly connected, connecting plate（54）The other end lead to Cross axle and bottom plate（55）Connecting hole be flexibly connected；The pressing plate（53）Weld jig is pressed on by rotation by clamping cylinder Turntable（3）On.

6. automatic butt-welding device according to claim 5, it is characterised in that the weld jig bottom is provided with four fixtures Connecting plate, the clamping connecting plate is symmetrically fixed on the bottom of weld jig, and the pressure head is pressed on clamping connecting plate.

7. automatic butt-welding device according to claim 6, it is characterised in that the weld assembly is located in weld jig Heart position, and positioned at rotary shaft（44）Surface.

8. automatic butt-welding device according to claim 1, it is characterised in that the butt-weld device includes weld cylinder （71）, push pedal（73）, pressure regulator valve and resistance soldering tip（74）；The resistance soldering tip（74）It is fixed on push pedal（73）On, the push pedal （73）It is fixed on weld cylinder（71）On, the weld cylinder（71）It is fixed on weld holder（75）Top, the weld holder （75）It is fixed on the end of mechanical arm；The weld holder（75）Inside is provided with guide rail（72）, the push pedal（73）Positioned at weld holder （75）Inside, and guide rail is movably arranged on by linear bearing（72）On；The pressure regulator valve and weld cylinder（71）Connection.

9. automatic butt-welding device according to claim 1, it is characterised in that the resistance soldering tip（74）It is provided with two, it is right Title is fixed on push pedal（73）On.