Welding device and technique of axle housing assembly Y-shaped weld joint

[0014] Example 1:

[0015] Welding equipment includes bed 2, active head 3, beam assembly 4, center positioning device 5, welding torch pneumatic lifting mechanism 6, welding torch adjusting mechanism 7, driven head 8, oscillator 9, automatic welding controller 10, electrical control System 11. Welding power source 12. The driving head 3 and the driven head 8 are connected to the two ends of the mounting rail surface of the bed 2 through positioning keys, rotating screws and bolts. The driving head 3 and driven head 8 are concentric and centered. The positioning device 5 is connected to the middle of the installation rail surface of the bed 2 by positioning keys and bolts. The center positioning device 5 is equipped with up and down adjustment devices. After the center positioning device 5 is installed, the height of the upper length can be adjusted up and down to ensure that the workpiece is placed on the center positioning device. 5 The center height of the two ends of the rear workpiece corresponds to the center height of the driving head 3 and the driven head 8. The beam assembly 4 is connected to the rear side of the bed 2 by bolts, and the left and right rotary heads are respectively passed through deep groove ball bearings, Centripetal bearings and bolts are connected with the active machine head box and the driven machine head box to form the active machine head 3 and the driven machine head 8. The two machine heads are equipped with turning devices; the oscillator 9 is connected with the welding gun adjustment mechanism 7 through bolts The welding torch adjusting mechanism 7 is connected to the welding torch pneumatic lifting mechanism 6 by bolts, and the welding torch pneumatic lifting mechanism 6 is connected to the sliding guide rails of the beam assembly 4 through sliding guides and bolts. The cylinders on the active head 3 and the driven head 8 The cylinder and the cylinder on the center positioning device 5 and the cylinder on the welding gun pneumatic lifting mechanism 6 are connected to the electrical control system 11 through the air pipe and the air pipe joint, and the welding power source 12 and the electrical control system 11 are connected to the automatic welding controller 10 through wires. .

[0016] The mounting rail surface of the bed 2 is the basic surface for the installation and combination of the components of the main machine. The active head 3 and the driven head 8 are installed on the rail surface, with a welding slag receiving tray in the middle, and an automatic welding controller installed on the front. 10; The beam assembly 4 is fixed at the back of the bed, and a triple piece of air source treatment is installed; all the wires and air pipes of the host should be placed inside the bed as much as possible.

[0017] The left slewing head is connected with the AC deceleration motor and the deceleration transmission mechanism, which has a compact structure and stable transmission. The right revolving head has no power transmission, and only supports and conducts electricity. Two indexing detection devices are installed on the inner main shaft of the left rotary head to realize the fixed speed forward and reverse rotation of the main shaft. There is a welding power supply positive or negative cable terminal next to the geared motor on the back of the rotary head.

[0018] The center positioning device 5 adjusts the height through a positioning disc, the left and right are automatically centered and clamped by a mandrel or a double V-shaped clamp, the driving part is connected with the air cylinder, and the movement of the driving part is completed by the air cylinder. The pneumatic positioning fixture of the axle housing should consider the rapid and reliable replacement of multiple products.

[0019] The beam assembly 4 includes two uprights, a crossbeam and an electric carriage. The lower ends of the two uprights are fixedly connected to the bed 2, and the upper ends of the two uprights are connected with the crossbeam; the crossbeam is provided with a two-way inlet linear guide surface, straight There is a rack on the guide surface of the slide rail, and the electric carriage is hung upside down on the linear slide. The electric carriage includes a carriage, a drive motor and a transmission gear; the drive motor is a stepping motor, and the gear on the output shaft meshes with the rack , The carriage is also equipped with a wire reel and its support, a wire feeding operation box and a support, and a lifting mechanism. The gear and the rack are engaged with a floating device to eliminate the transmission gap.

[0020] The welding gun lifting mechanism of the welding gun lifting mechanism 6 is divided into two parts: a pneumatic lifting mechanism and an electric lifting mechanism. The pneumatic lifting mechanism is driven by a cylinder and guided by a linear slide, which is fast and reliable; the electric lifting mechanism uses a stepping motor as the driving power, and the screw nut is driven to lift. Limit. Pneumatic lifting can be realized quickly, saving auxiliary time; electric lifting can realize the tracking and adaptation of weld height direction.

[0021] The welding gun adjustment mechanism 7 has the functions of centering adjustment in the X, Y, and Z directions and adjustment of the welding gun angle.

[0022] Welding power source 12 is 2 sets of NB-500 welding power source with single function and special mechanical welding configuration produced by Beijing Times Group

[0023] The air circuit system consists of air source processing triples, electronically controlled air valves, cylinders and exhaust throttle valves, pipelines and other components. Rotate the handle of the three-piece intermediate pressure regulating valve to adjust the output air pressure.

[0024] The electrical control system is composed of an electrical control cabinet, an operating box and connecting wires. It adopts the PLC programmable controller of Mitsubishi Corporation of Japan as the main control unit, and is equipped with an industrial touch screen for parameter setting and control. The control system completes the cylinder control through the PLC program controller. Functions of motion, motor, wire feeder, welding power control and other functions. The walking and lifting of the welding torch are driven by imported drivers, and the walking speed is digitally displayed.

[0025] Take the Y-shaped welding seam welding of a certain axle housing wood body assembly as an example. First, according to the welding process requirements, design a control program that automatically controls the welding torch driving mechanism, the welding power source arc starting, closing and clamping device, and the program controls each The motion mechanism works according to the required welding process motion mode; the specific operation is as follows: first place the axle housing body assembly on the center positioning mechanism 5, press the start button on the automatic welding controller 10, and the program controls the active machine head 2 and the driven machine head 6 Position and clamp the workpiece. At the same time, the welding gun will be lifted up and down pneumatically, and the driving mechanism 4 will drive the welding torch down to the specified position, and then press the operation button on the automatic welding controller 10, the program will control the pneumatic up and down of the welding torch, and the driving mechanism 4 will drive the welding torch to the welding position. Press the welding button on the automatic welding controller 10, the program controls the torch to lift up and down pneumatically, and the drive mechanism 4 drives the torch to weld according to the weld track of the workpiece; after welding the first side, follow the above steps to weld the other weld.