CN101879649B - Automatic profiling welding device for automobile - Google Patents

Abstract

An automatic profiling welding device for automobiles, which includes a carbon dioxide shielded welding machine, a welding torch moving mechanism and a welding trigger mechanism, the welding torch moving mechanism is composed of a rodless cylinder, a vertical guide rail, a welding torch holding arm and a profiling guide rail The rod cylinder is installed horizontally on the equipment base; the vertical guide rail is fixed on the rodless cylinder slider through the guide rail bracket; The profiling guide rail is supported on the base and matches the welding bead curve of the workpiece, and a guide wheel is set between the welding torch holding arm and the profiling guide rail; a workpiece positioning and clamping device is also provided on the equipment base. Compared with the existing welding device, the device not only has the advantages of convenient operation, fast welding speed and low labor intensity of workers, but also has simple structure, low cost, convenient maintenance and repair, and high welding precision.

Description

An automatic profiling welding device for automobiles

technical field

The invention relates to an automatic welding device, in particular to a pneumatic automatic profiling welding device used in an automobile production line, and belongs to the field of welding technology.

Background technique

At present, three welding methods are usually used in the production process of automobile frames: manual welding, robot welding and ordinary profiling automatic welding. Among them, manual welding is carbon dioxide shielded welding performed by the operator holding a welding torch. Its disadvantages are low welding efficiency, high labor intensity for workers, harsh production environment, and the welding accuracy and welding consistency cannot be effectively guaranteed. Robot welding can realize the welding of complex-shaped weld beads. It has the advantages of high welding quality, fast welding speed, and low labor intensity. However, the structure of the robot is complex, the parameter adjustment and program setting are cumbersome, and it has high requirements for operators and maintenance High expense. Ordinary profiling automatic welding uses the motor as the driving force to drive the profiling wheel and welding gun to move through the screw or rack and pinion. Equipped with welding automatic monitoring device, the control degree of welding cycle is relatively low. In addition, this kind of profiling automatic welding uses profiling rails and springs to control the vertical displacement of the welding torch, and the control accuracy is low, which affects the welding quality to a certain extent. Therefore, it is of great significance to design an automatic welding device with a simple structure in order to maximize the simplification of the equipment structure, reduce the production cost and improve the welding accuracy while improving the production efficiency and reducing the labor intensity of the workers.

Contents of the invention

The object of the present invention is to overcome the deficiencies of the prior art and provide an automatic profiling welding device for automobiles with simple structure, convenient operation, high welding quality and fast welding speed.

Problem described in the present invention is realized with following technical scheme:

An automatic profiling welding device for automobiles, which includes a carbon dioxide shielded welding machine, a welding torch moving mechanism and a welding trigger mechanism. The welding torch moving mechanism is composed of a rodless cylinder, a vertical guide rail, a welding torch holding arm and a profiling guide rail. The rod cylinder is installed horizontally on the equipment base; the vertical guide rail is fixed on the rodless cylinder slider through the guide rail bracket; It is supported on the base by profiling guide rails that match the curve of the workpiece weld bead. A guide wheel is set between the welding torch holding arm and the profiling guide rails; a workpiece positioning and clamping device is also provided on the equipment base.

The above-mentioned automatic profiling welding device for automobiles, the welding trigger mechanism is composed of a proximity switch and its trigger plate, the proximity switch is installed on the slider of the rodless cylinder, and its contacts control the carbon dioxide protection welding machine; The rod cylinder is arranged and corresponds to the weld bead on the workpiece.

The above-mentioned automatic profiling welding device for automobiles is also provided with a rod cylinder on the guide rail bracket, and the rod cylinder is vertically installed below the welding torch holding arm.

The above-mentioned automatic profiling welding device for automobiles is provided with a travel switch corresponding to the guide rail bracket at the end of the rodless cylinder, and the travel switch controls the solenoid valves of the rodless cylinder and the rod cylinder.

The above-mentioned automatic profiling welding device for automobiles is provided with a counterweight on the guide rail bracket.

The invention uses a rodless cylinder to drive the welding torch holding arm to move along the vertical guide rail and the profiling guide rail, thereby driving the welding torch to move along the welding bead of the workpiece, which greatly simplifies the structure of the welding torch moving mechanism, reduces the volume of the welding torch moving mechanism, and reduces the The manufacturing cost of the equipment; the welding torch holding arm moves vertically along the linear guide rail under the action of gravity, which has higher profiling accuracy than traditional automatic welding equipment; the trigger plate is used to trigger the proximity switch when the welding torch moves to the welding place, so that it is turned on The power supply of the welding machine controls the work of the welding machine. The function of the rod cylinder is to jack up the welding torch holding arm when the rodless cylinder drives the welding torch holding arm to return or replace the profiling guide rail, which makes the operation more convenient. The counterweight is used to balance the weight of the welding torch. Compared with the existing welding device, the device not only has the advantages of convenient operation, fast welding speed and low labor intensity of workers, but also has simple structure, low cost, convenient maintenance and repair, and high welding precision.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing.

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the right view of Fig. 1;

Figure 3 is a top view of the welding trigger mechanism.

The labels in the figure are: 1. Base; 2. Profiled guide rail; 3. Guide wheel; 4. Rodless cylinder; 5. Trigger plate; 6. Rodless cylinder slider; 7. Proximity switch; 8. Counterweight ;9, guide rail bracket; 10, vertical guide rail; 11, guide rail slider; 12, rod cylinder; 13, welding torch handle arm; 14, welding torch; 15, workpiece; ; 18, weld bead.

Detailed ways

A rodless cylinder refers to a cylinder that uses a piston to connect directly or indirectly to an external actuator and makes it reciprocate following the piston. The biggest advantage of this cylinder is to save installation space. The piston of the rodless cylinder used in this device is connected and integrated with the slider outside the cylinder. There is a rubber seal (outsourcing steel belt) on the cylinder, and the connecting part of the piston slides over the rubber seal. The seal is opened, and it is closed when it is slid over. There is no air leakage, and the design is very ingenious.

Referring to Fig. 1 and Fig. 2, the present invention includes a carbon dioxide shielded welding machine, a base 1, a welding torch moving mechanism and a welding trigger mechanism, and the welding torch moving mechanism includes a rodless cylinder 4, a rod cylinder 12, a profiling guide rail 2, a guide wheel 3, a vertical Straight guide rail 10, guide rail slider 11, welding torch holding arm 13, welding trigger mechanism includes trigger plate 5, proximity switch 7, and travel switch 17 in addition.

A rodless cylinder 4, a profiling guide rail 2 and a workpiece positioning and clamping mechanism 16 are fixedly installed on the base 1; On the rodless cylinder slide block 6, a guide rail support 9 is fixed, on the guide rail support 9, a vertical guide rail 10 and a rod cylinder 12 are fixed, on the guide rail slide block 11 of the vertical guide rail 10, a welding gun handle arm 13 is installed, The lower part of the welding torch holding arm 13 is provided with a guide wheel 3, and a welding torch holding mechanism is provided at the end of the welding torch holding arm 13. The welding torch holding mechanism fixes the welding torch 14 and can adjust the angle of the welding torch 14 and the relative position with the workpiece to ensure The welding torch 14 can perform the welding operation on the workpiece 15 at the beginning of the welding cycle. When the welding cycle begins, the cylinder rod of the rod cylinder 12 is retracted, and the vertical guide rail 10 guides the welding torch holding arm 13 to slide downward; On the shaped guide rail 2, the rodless cylinder 4 is powered by compressed air, and the welding torch 14 is driven by the welding torch holding arm 13 to complete the profiling action. When the rodless cylinder 4 drives the welding torch holding arm 13 to return, the cylinder rod of the rod cylinder 12 stretches out and jacks up the welding torch holding arm 13 .

The welding trigger mechanism controls the welding cycle. When the proximity switch 7 passes through the trigger plate 5, it sends a control signal, and controls the action of the welder through the relay; 5 and the relative position of the profiling guide rail 2; the counterweight 8 balances the gravity of the welding torch. When the guide rail bracket 9 triggers the travel switch 17, a control signal is sent to control the action of the solenoid valves of the rodless cylinder 4 and the rod cylinder 12 through a relay.

Press the start button, the working process starts. The cylinder rod of the rod cylinder 12 retracts quickly before the action of the rodless cylinder 4, and the welding torch holding arm 13 is under the action of gravity, so that the guide wheel 3 is pressed on the profiling guide rail 2, and the rodless cylinder 4 pushes the welding torch holding arm 13 forward , the guide wheel 3 rolls along the profiling guide rail 2, and in the process of walking, when the proximity switch 7 passes the trigger plate 5, the proximity switch 7 outputs a welding signal to the welder, and the welder starts welding, and the signal disappears after the proximity switch 7 moves away from the trigger plate 5 After that, the welder stops welding. As a result, segmental welding during the welding process can be realized. After the welding stroke is completed, the travel switch 17 acts, the solenoid valve resets, and the cylinder rod of the rod cylinder 12 stretches out quickly before the action of the rodless cylinder 4, and the welding torch holding arm 13 is jacked up; the rodless cylinder 4 pushes the welding torch holding arm 13 backstroke , waiting for the next welding cycle.

The device only needs to manually clamp the workpiece, and press the start button to realize automatic welding, which reduces the labor intensity of workers and improves the welding accuracy. Compared with other automatic welding technologies, the structure is simple, the cost is low, and it is easy to realize on the production site.

Claims (4)

1. automatic profiling welding device for automobile; It is characterized in that; It comprises CO2 shield welder, welding gun travel mechanism and welding trigger mechanism; Said welding gun travel mechanism is made up of Rodless cylinder (4), upright guide rail (10), welding gun control arm (13) and profiling guide rail (2), and said Rodless cylinder (4) level is installed on the plant bottom case (1); Said upright guide rail (10) is fixed on the stockless cylinder slipper (6) through rail brackets (9); Said welding gun control arm (13) one ends are fixed on the upright guide rail slide block (11); The other end is installed welding gun (14); The center by be fixed in that base (1) is gone up and with profiling guide rail (2) supporting that is complementary of workpiece welding bead curve, between welding gun control arm (13) and profiling guide rail (2), be provided with directive wheel (3); On plant bottom case (1), also be provided with work piece positioning and tightly install (16);

Said welding trigger mechanism is by forming near switch (7) and trigger board (5) thereof, saidly is installed on the stockless cylinder slipper (6) its contact control CO2 shield welder near switch (7); Said trigger board (5) is along Rodless cylinder (4) layout and corresponding with the welding bead (18) on the workpiece.

2. according to the said automatic profiling welding device for automobile of claim 1, it is characterized in that, on rail brackets (9), also be provided with bar cylinder (12), the said below that has bar cylinder (12) vertically to be installed on welding gun control arm (13).

3. according to the said automatic profiling welding device for automobile of claim 2; It is characterized in that; End at Rodless cylinder (4) is provided with the travel switch (17) corresponding with rail brackets (9), and said travel switch (17) is controlled Rodless cylinder (4) and the magnetic valve of bar cylinder (12) is arranged.

4. according to the said automatic profiling welding device for automobile of claim 3, it is characterized in that, balancing weight (8) is set on rail brackets (9).

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