CN202240082U - Automatic elevation angle welding system for the outer transverse weld seam of end wall and end beam of gondola car - Google Patents

Abstract

The utility model provides an automatic overhead welding system for transverse welding seams outside end walls and end beams of a gondola car, which comprises a welding seam tracking device; the welding seam tracking device comprises a mounting bracket, an angle adjusting plate, a tracking cylinder, a tracking head, a tracking wheel and a welding gun; the angle adjusting plate is connected with the mounting bracket, the tracking cylinder is connected with the tracking head, and the tracking head drives the tracking wheel and a welding gun arranged on the tracking wheel; the angle adjusting plate slides up and down along the mounting bracket. The utility model discloses an automatic welding system that faces upward of horizontal welding seam outside headwall and end beam to automatic weld replaces manual welding, can keep the exact parameter throughout in aspects such as welder angle, welding wire front end and welding seam central distance, the interval internal movement speed of welding seam, thereby guarantees that the formation of the angle welding seam that faces upward is good.

Description

Automatic elevation angle welding system for the outer transverse weld seam of end wall and end beam of gondola car

technical field

The utility model relates to the welding problem of the elevation angle welds formed after the end walls and end beams at both ends of the railway freight car gondola are assembled, in particular to an automatic elevation angle welding system and welding method for the outer transverse welds of the end walls and end beams. the

Background technique

For a long time, in the manufacturing technology of the C70A open car in the entire railway wagon manufacturing industry, the welding of the 2700mm-long elevation weld formed after the end wall and end beam are assembled has always been done by manual overhead welding. The specific method is as follows; firstly, the assembled gondola car body is placed horizontally on the bench of the welding station, and then the electric welding operator uses CO2 gas shielded welding to carry out manual welding in the form of overhead welding. In order to ensure the good formation of the angled weld, the welding operator should first adjust the welding current and voltage according to the process requirements. Then make the welding torch form an angle of 40°-50° with the vertical plane where the welding seam is located, and always keep the distance between the front end of the welding wire and the center of the welding seam at about 2mm, and at the same time as the welding is in progress, the welding seam should be welded from the arc starting point to the arc ending point of the welding seam. Move laterally at a uniform speed as much as possible within the interval of the point. In the entire railway freight car manufacturing industry, the welding of the two elevation welds of the end wall and end beam of the C70A open car has always been completed by electric welding operators in the form of manual overhead welding. The requirements are very high, and the welding efficiency is low and the labor intensity is high. Therefore, the welding quality of this weld is extremely unstable and affects the appearance quality of the vehicle. the

Utility model content

In order to solve the technical problems existing in the background technology, the utility model proposes an automatic elevation angle welding system for the outer transverse welds of the end wall and the end beam. The distance, the movement speed in the welding seam interval and other aspects are always kept correct parameters, so as to ensure the good formation of the elevation welding seam. the

The technical solution of the utility model is: an automatic elevation angle welding system for the outer transverse welds of the end wall of the gondola car and the end beam, which is special in that: the elevation angle welding system includes a seam tracking device; Support, angle adjustment plate, tracking cylinder, tracking head, tracking wheel and welding torch; the angle adjustment plate is connected with the tracking cylinder, the tracking cylinder is connected with the tracking head, and the tracking head drives the tracking wheel and the welding torch arranged on the tracking wheel; The angle adjustment plate slides up and down along the mounting bracket. the

The above-mentioned welding system also includes a welding operation control device and a welding position changing device, the welding position changing device is connected with the welding seam tracking device through a lifting mechanism, the welding seam tracking device can rotate around the rotating shaft, and the welding operation controlling device is connected with the welding position changing device . the

The seam tracking device also includes a mounting bracket perpendicular to the rotating shaft and connected to the welding position changing device; a first spring is set between the tracking head support plate and the tracking head; a second spring is set between the tracking cylinder and the mounting bracket. the

Between the tracking head and the tracking cylinder of the above-mentioned welding seam tracking device, a tracking head support plate and a linear guide rail slider for driving the tracking head to move are arranged, and the tracking head is arranged on the linear guide rail slider. the

The above-mentioned welding position changing device includes a whole machine fast moving device, a gantry slow moving device and a tracking steering device, and the whole machine fast moving device includes a programmable terminal, a programmable controller, a frequency converter and a fast moving motor, and the fast moving motor Drive the worm gear reducer and the sprocket chain pair to drive the wheels to rotate; the gantry slow moving device includes a programmable terminal, a programmable controller, a frequency converter and a gantry moving motor, and the gantry moving motor is connected to the bevel gear, the bevel gear Drive the screw to rotate, and the screw drives the automatic elevation welding system to move; the tracking steering device includes a programmable terminal, a programmable controller, a frequency converter and a worm drive motor, and the tracking steering device passes through the lifting device and the weld seam tracking device connect. the

The welding operation control device includes a programmable terminal, a programmable controller, a frequency converter, an AC servo driver, and an AC servo motor; the rotation of the AC servo motor drives the carriage to move linearly after being driven by a rack and pinion pair; Tracking steering device, lifting device, welding operation control device and welding seam tracking device are set on the carriage. the

The utility model has the advantages of:

1) The automatic elevation angle welding system for the outer transverse welds of the end wall and the end beam of the utility model can always maintain the correct angle of the welding torch, the distance between the front end of the welding wire and the center of the weld, and the movement speed in the weld interval through the mechanical overall system. parameters, so as to ensure that the elevation welding seam is well formed, and the system automatically completes a series of tasks such as tracking and positioning, so that the welding quality can get rid of the dependence on the technical level of the welding operator and other personal factors. the

2) According to the set parameters, it can weld 800mm per minute, and the welding seam is uniform and well formed. However, ordinary electric welding operators can weld about 400 millimeters per minute with the overhead welding method, and the welding seam is uneven and the shape is poor. The production efficiency of the utility model is doubled compared with that of manual welding, and the qualified rate of the welding seam almost reaches 100%. the

3) The welding position transformation system proposed by this utility model is to complete the welding position transformation through the mutual cooperation of the various mechanisms of the automatic welding device itself. It can also be replaced by adding auxiliary tooling or changing the process flow to complete the welding position transformation of the workpiece. The welding position transformation method in the utility model scheme is flexible in form. the

4) The control device adopts open-loop control. The open-loop control method has the characteristics of good system stability and timely response, and its operating accuracy can be as high as 0.01 mm. Therefore, it can meet the requirements of precise movement along the X-axis direction of the weld according to the set welding speed and point coordinates. the

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is the structural block diagram of the utility model welding position changing device;

Fig. 3 is the structural representation of the utility model seam tracking device;

Detailed ways

Referring to Fig. 1 and Fig. 2, the automatic elevation angle welding system for the outer transverse weld of the end wall and the end beam of the utility model includes a welding position changing device 1, a welding seam tracking device 2 and a welding operation control device 3, and the welding position changing device 1 includes the whole Machine fast moving device 10, gantry slow moving device 11 and tracking steering device 12. The whole machine fast moving motor 102 of the whole machine fast moving device 10 rotates through the transmission of the worm gear reducer 103 and the sprocket chain pair 104 to drive the wheels to rotate, and the automatic elevation welding system moves the whole machine quickly and reaches the set position Stop immediately afterwards; the rotary motion of the gantry moving motor 112 of the gantry slow moving device 11 drives the lead screw 114 to rotate after being transmitted by the bevel gear 113, and the rotating lead screw drives the gantry 13 of the automatic elevation welding system slowly from one end of the complete machine Move to the other end, stop moving immediately when the gantry 13 reaches the set position; the rotary motion of the worm drive motor 121 of the tracking steering device 12 drives the seam tracking device 2 to rotate around the Z axis after being driven by the worm and worm gear pair 122 , when the rotation angle reaches 180°, it stops immediately. The fast moving device 10 of the whole machine, the slow moving device 11 of the gantry and the tracking steering device 12 are all controlled by touch programmable terminals, programmable controllers and frequency converters. When the tracking steering device 12 is in operation, the lifting device 14 is controlled by the touch programmable terminal and the programmable controller to lift the seam tracking device 2 to the top, and then rotate around the Z axis. Through the cooperative movement of the three parts of the fast moving device 10 of the whole machine, the slow moving device 11 of the gantry and the tracking steering device 12, the welding position changing device 1 of the present invention can conveniently perform welding positions at both ends of the C70A gondola car according to the order of the operator. transformation. the

The welding operation control device 3 controls the AC servo motor 31 to rotate precisely according to the set coordinates and speed by the touch-type programmable terminal, the programmable controller, and the AC servo driver. After the rotation of the AC servo motor 31 is driven by the rack and pinion pair 32, the carriage 33 and the components installed on it are driven to perform precise linear motion along the X-axis direction. During the welding operation, when the X-axis coordinates are the same as the set welding arc start point coordinates, the welding starts; when the X-axis coordinates are the same as the set welding arc end point coordinates, the welding ends. the

Referring to FIG. 3 , the seam tracking device 2 adopts a mechanical tracking device, which is connected to a mounting bracket 21 through a rotating shaft 20 and the seam tracking device 2 can rotate around the rotating shaft 20 . When the angle adjustment plate 22 is slid upward, the initial included angle between the seam tracking device 2 and the horizontal plane increases; when the angle adjustment plate 22 is slid downward, the initial included angle between the seam tracking device 2 and the horizontal plane decreases. The initial height and initial extension distance of the tracking wheel 27 can be controlled by adjusting the size of the initial included angle between the seam tracking device 2 and the horizontal plane. Tracking cylinder 23 links to each other with tracking head supporting plate 24, can drive tracking head supporting plate 24 and linear guide slide block 25, tracking head 26 installed on it and stretch out together when tracking cylinder 23 stretches out. Tracking head 26 links to each other with tracking head supporting plate 24 by linear guide slide block 25, and tracking wheel 27, welding torch 28, welding torch regulator 29 are installed on tracking head 26. The first spring 210 is installed between the tracking head 26 and the tracking head support plate 24 , and the second spring 211 is connected to the mounting bracket 21 and the tracking cylinder 23 . the

During the welding process, firstly, the whole machine fast moving device 10 of the welding position changing device 1 is used to run to a set point near the workpiece. Then, the gantry slow moving device 11 of the welding position changing device 1 is used to make the welding seam tracking device 2 run accurately to the set distance from the elevation welding seam. Tracking head 26, tracking wheel 27 and welding torch 28 can stretch out together when tracking cylinder 23 stretches out. Since the tracking cylinder 23 extends farther than the distance between the tracking wheel 27 and the workpiece, the tracking wheel 27 has run into the vertical surface of the workpiece when the tracking cylinder 23 is not fully stretched out. Since the tracking wheel 27 receives the force of the workpiece, the seam tracking device 2 rotates counterclockwise around the rotating shaft 20, and the second spring 211 stretches to make the tracking wheel 27 stick to the surface of the workpiece. The tracking cylinder 23 pushes the tracking wheel 27 to continue sliding along the surface of the workpiece until the outer edge of the tracking wheel 27 reaches the position of the elevation weld seam. onto the tracking head 26 and pre-compresses the first spring 210 . When the automatic welding device of the present invention performs welding movement along the X-axis direction, the tracking wheel 27 is always in close contact with the surface of the workpiece and against the welding seam under the action of the first spring 210 and the second spring 211 . When the weld seam deviates in the Y-axis or Z-axis direction, the first spring 210 automatically compresses or relaxes correspondingly, so that the tracking head 26 retracts or pops up, thereby compensating for the offset in the Y-axis or Z-axis direction in time, It is ensured that the front end of the welding wire of the welding torch 28 keeps a constant distance from the center of the welding seam all the time. the

Claims (6)

1. The automatic elevation angle welding system for the outer transverse welds of the end wall and the end beam of the gondola car, characterized in that: the elevation angle welding system includes a seam tracking device; the seam tracking device includes a mounting bracket, an angle adjustment plate, a tracking cylinder, a tracking head, tracking wheel and welding gun; the angle adjustment plate is connected with the tracking cylinder, the tracking cylinder is connected with the tracking head, and the tracking head drives the tracking wheel and the welding torch arranged on the tracking wheel; the angle adjustment plate slides up and down along the mounting bracket. 2. The automatic elevation angle welding system of the end wall of the gondola car and the outer transverse weld of the end beam according to claim 1, characterized in that: the welding system also includes a welding operation control device and a welding position changing device, and the welding position changing device is lifted The mechanism is connected with the seam tracking device, which can rotate around the rotating shaft, and the welding operation control device is connected with the welding position changing device. 3. The automatic elevation angle welding system for the outer transverse welds of the end wall and the end beam of the gondola car according to claim 2, characterized in that: the seam tracking device also includes a mounting bracket perpendicular to the rotating shaft and connected to the welding position changing device; A first spring is arranged between the tracking head and the tracking head supporting plate; a second spring is arranged between the tracking cylinder and the mounting bracket. 4. The automatic elevation angle welding system of the end wall of the gondola car and the outer transverse weld of the end beam according to claim 3, characterized in that: a tracking head and a tracking cylinder of the welding seam tracking device are provided between the tracking head and the tracking cylinder to drive the tracking head to move. The tracking head supporting plate and the linear guide rail slider, the tracking head is arranged on the linear guide rail slider. 5. The automatic elevation angle welding system of the end wall of the gondola car and the outer transverse weld of the end beam according to claim 1 or 2 or 3 or 4, characterized in that: the welding position changing device includes a fast moving device for the whole machine, a slow moving gantry The moving device and the tracking steering device, the fast moving device of the whole machine include a programmable terminal, a programmable controller, a frequency converter and a fast moving motor, and the fast moving motor drives the worm gear reducer and the sprocket chain pair to drive the wheels to rotate; The gantry slow moving device includes a programmable terminal, a programmable controller, a frequency converter, and a gantry moving motor. The gantry moving motor is connected to a bevel gear, and the bevel gear drives a lead screw to rotate, and the lead screw drives the automatic elevation welding system to move The tracking and steering device includes a programmable terminal, a programmable controller, a frequency converter and a worm drive motor, and the tracking and steering device is connected with the seam tracking device through a lifting device. 6. The automatic elevation angle welding system of the end wall of the gondola car and the outer transverse weld of the end beam according to claim 5, characterized in that: the welding operation control device includes a programmable terminal, a programmable controller, a frequency converter, an AC servo Driver and AC servo motor; the rotation of the AC servo motor drives the carriage to move linearly after being driven by the rack and pinion pair; the carriage is equipped with a tracking steering device, a lifting device, a welding operation control device, and a seam tracking device. the

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