CN102990193B - Arc swinging device applied to automatic metal welding - Google Patents

Abstract

The invention relates to an arc swing device for metal automatic welding, which includes a welding torch, a swing arc crank linkage mechanism, a welding torch clamping and a weld seam width adjustment mechanism, and the swing arc crank linkage mechanism includes a base plate, a DC motor, an eccentric wheel and The connecting rod and the swing guide plate, the DC motor is connected to the base plate, the output shaft of the DC motor is connected to one side of the eccentric wheel, the two sides of the connecting rod are respectively hinged on the eccentric wheel and the swing guide plate, and the swing guide plate is fixed on the base plate Above; the welding torch clamping and welding seam width adjustment mechanism includes a sliding plate and a clamping block. The gun rod of the welding torch is installed between the sliding plate and the clamping block and can be adjusted axially. The sliding plate can be adjusted and installed on the swing guide plate. There are welding seam width indicator lines on the guide plate and sliding plate. The invention has the characteristics of reasonable and concise structure, convenient maintenance, low manufacturing cost, convenient maintenance and easy control.

Description

Swing arc device for metal automatic welding

technical field

The invention relates to an arc swing device for automatic metal welding, which belongs to the technical field of automatic welding.

Background technique

In recent years, with the development of digitization, automation, computer and mechanical design technology, and the high emphasis on welding quality, automatic metal welding has developed into an advanced manufacturing technology, and automatic welding equipment has played an important role in the application of various industries The role is getting bigger and bigger, and the scope of application is expanding rapidly. In modern industrial production, the mechanization and automation of the welding production process is an inevitable trend in the modernization of the welding mechanism manufacturing industry.

At present, one type of arc swing device on metal automatic welding equipment uses a servo motor to drive a rack and pinion transmission mechanism, or a servo motor to drive a bevel gear pair transmission mechanism, and controls the swing of the welding torch through a servo motor to drive a gear transmission mechanism. The above structure is complicated. In particular, there is a transmission gap, and the servo motor needs to rotate forward and backward alternately during arc swing, which is not only difficult to control, but also has extremely high requirements on the performance and life of the motor, and the manufacturing cost is high. Another structure of the swing arc device is to use magnetically controlled arc swing, its structure and control are more complicated, maintenance is difficult, and the cost is high. Furthermore, the swing amplitude of many arc swing devices is fixed at present, and the weld seam width cannot be adjusted, so it cannot be applied to metal welding under different working conditions.

Contents of the invention

The object of the present invention is to provide an arc swing device for automatic metal welding with reasonable structure, simple structure, convenient maintenance, low manufacturing cost, convenient maintenance and easy control.

The technical solution of the present invention to achieve the above object is: an arc swing device for automatic metal welding, which is characterized in that it includes a welding torch, a swing arc crank linkage mechanism, a welding torch clamping and a weld width adjustment mechanism, and the The swing arc crank linkage mechanism includes a base plate, a DC motor, an eccentric wheel, a connecting rod and a swing guide plate. The DC motor is connected to the base plate, the output shaft of the DC motor is connected to one side of the eccentric wheel, and the two sides of the connecting rod are respectively hinged on the The eccentric wheel and the swing guide plate, and the swing guide plate is fixed on the base plate; the welding torch clamping and weld width adjustment mechanism includes a sliding plate and a clamping block, and the gun rod of the welding torch is installed between the sliding plate and the clamping block And can be adjusted axially, the sliding plate can be adjusted and installed on the swing guide plate, the swing guide plate and the slide plate are provided with a weld width indicator line, the slide plate is provided with a notch or guide bump, the swing guide plate The guide bump on the slide plate is set in the notch of the slide plate; or the guide bump on the slide plate is set in the guide groove on the swing guide plate, the fastener connects the slide plate to the swing guide plate, and the swing guide plate The indicator line is the reference line, and the indicator line on the sliding plate is the weld width scale line.

The present invention adopts the above technical scheme to have the following advantages:

1. The swinging arc device of the present invention adopts a crank-link transmission mechanism composed of an eccentric wheel, a connecting rod, a swinging guide plate and a base plate, and drives the eccentric wheel through a DC motor to drive the connecting rod to drive the swinging guide plate to drive the welding torch to clamp and weld. The seam width adjustment mechanism acts, and the welding torch clamping formed on the sliding plate and the clamping block and the welding seam width adjustment mechanism clamp the welding torch to make it move along the set swing arc trajectory. The structure is reasonable and simple. Due to the crank connecting rod transmission mechanism There is no transmission gap, not only the manufacturing cost is low, but also the disassembly and maintenance are convenient.

2. The arc swinging device of the present invention uses a DC motor to drive the crank connecting rod transmission mechanism to drive the clamping of the welding torch and the action of the welding seam width adjustment mechanism. During operation, the DC motor only needs to rotate in one direction, and does not need to rotate forward and reverse alternately. The swing frequency is controlled by the DC motor. The rotation speed is determined, the swing frequency is linearly related to the rotation speed, the control is simple, and compared with other servo motors, the price is lower and the cost is saved.

3. The arc swing device of the present invention adopts a welding torch clamping and weld width adjustment mechanism composed of a sliding plate and a clamping block. The gun rod of the welding torch is installed between the sliding plate and the clamping block and can be adjusted axially, so the welding torch can be adjusted The height of the welding seam can be adjusted at will, and the sliding plate is installed on the swing guide plate and can be adjusted, so the swing amplitude can be adjusted by adjusting the installation position of the sliding plate and the swing guide plate, so as to facilitate the adjustment of the weld width and the weld width It has a linear relationship with the moving distance of the sliding plate. Since the height and width of the weld seam can be adjusted at will, the adjustment and control are simple, and it can be used for metal welding under different working conditions.

Description of drawings

Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Fig. 1 is a structural schematic diagram of an arc swing device for automatic metal welding according to the present invention.

Fig. 2 is a schematic diagram of the sectional structure of the eccentric wheel of the present invention.

Fig. 3 is a structural schematic diagram of the eccentric wheel of the present invention.

Fig. 4 is a structural schematic diagram of the swing guide plate of the present invention.

Fig. 5 is a schematic diagram of the structure of the sliding plate of the present invention.

Fig. 6 is a schematic structural view of the clamping block of the present invention.

Fig. 7 is a schematic diagram of the swing arc crank linkage mechanism of the present invention.

Fig. 8 is a diagram of the swing trajectory of the end of the welding torch in the present invention.

Among them: 1—DC motor, 1-1—output shaft, 2—motor seat, 3—eccentric wheel, 3-1—installation hole, 3-2—eccentric shaft, 3-3—threaded hole, 4—base plate, 5 —fastener, 6—connecting rod, 7—swing guide plate, 7-1—guiding bump, 8—welding torch, 8-1—gun shaft, 9—clamping block, 10—sliding plate, 10-1—slot mouth. .

Detailed ways

As shown in FIG. 1 , the swing arc device for automatic metal welding of the present invention includes a welding torch 8 , a swing arc crank linkage mechanism, and a welding torch clamping and welding seam width adjustment mechanism.

As shown in Figures 1-4, the swing arc crank linkage mechanism of the present invention includes a base plate 4, a DC motor 1, an eccentric wheel 3, a connecting rod 6 and a swing guide plate 7, the DC motor 1 is connected to the base plate 4, and the DC motor 1 A DC motor with a deceleration mechanism can be used, as shown in Figure 1, the DC motor 1 of the present invention is installed on the angular motor base 2, and the other side of the motor base 2 is installed on the base plate 4 by a fastener 5, the DC The output shaft 1-1 of the motor 1 is connected with the eccentric wheel 3, and the two sides of the connecting rod 6 are respectively hinged on the eccentric wheel 3 and the swing guide plate 7, and the eccentric wheel 3 is driven to rotate by the DC motor 1 to drive the connecting rod 6 to move. As shown in Figures 1-3, the eccentric wheel 3 of the present invention is provided with a mounting hole 3-1, and the mounting hole 3-1 of the eccentric wheel 3 is set on the output shaft 1-1 of the DC motor 1 and passed through the fastener 5 or Key connection, the eccentric shaft 3-2 on the eccentric wheel 3 is connected with the connecting rod 6, and the mounting hole on one side of the connecting rod 6 is sleeved on the eccentric shaft 3-2. As shown in Figures 1 and 3, the two sides of the eccentric wheel 3 of the present invention are two planes and distributed symmetrically to the center, one side of which is provided with a threaded hole 3-3, and the fastener 5 is screwed into the threaded hole 3 of the eccentric wheel 3 -3 and on the output shaft 1-1 of the DC motor 1. The other side of the connecting rod 6 of the present invention is connected with the swing guide plate 7 through a pin shaft, the connecting rod 6 is hinged on the swing guide plate 7 , and the swing guide plate 7 is fixed on the base plate 4 . As shown in Fig. 4, the swing guide plate 7 of the present invention is in the shape of steps, each step is provided with a mounting hole and a pin hole, so that the swing guide plate 7 is fixed on the base plate 4 and hinged with the connecting rod 6, the structure is reasonable and simple, The transmission is reliable. In the present invention, a positioning hole is provided on the base plate 4, and the base plate 4 is installed on the welding tool through the positioning hole.

1, 5, and 6, the welding torch clamping and weld width adjustment mechanism of the present invention includes a sliding plate 10 and a clamping block 9, and the gun shaft 8-1 of the welding torch 8 is installed between the sliding plate 10 and the clamping block 9. and can be adjusted axially, the sliding plate 10 and the clamping block 9 are provided with an arc-shaped clamping surface, the fastener passes through the clamping block 9 and is connected to the sliding plate 10, and the clamping block 9 is fixed on the sliding plate 10 Clamp the gun shaft 8-1 of the welding torch 8, the length of the gun shaft 8-1 of the welding gun 8 of the present invention is 500-800mm, such as the length of 600mm, 650mm and 700mm or 750mm, etc., and the longer gun shaft 8-1 has Large adjustment range, the bending angle β130-145° at the bottom of the gun rod 8-1 of the present invention, such as the bending angle β at the bottom of the gun rod 8-1 is at 135° or 138° or 140°, etc., the welding torch 8 can be adjusted by loosening the fastener height position to adjust the weld height. Referring to Fig. 1 , the sliding plate 10 of the present invention can be adjusted and installed on the swing guide plate 7, and a weld width indicator line is provided on the swing guide plate 7 and the slide plate 10 to facilitate the adjustment of the weld width.

As shown in Figures 1, 4, and 5, the slide plate 10 of the present invention is provided with a notch 10-1 or a guide bump, and the guide bump 7-1 on the swing guide plate 7 is arranged on the notch 10 of the slide plate 10. -1, as shown in Figure 4, the sliding plate 10 of the present invention can be a U-shaped structure, the two sides of the sliding plate 10 are respectively provided with notches 10-1 symmetrical along the center, and the notches 10-1 on one side of the sliding plate 10- 1 cooperates with the guide projection 7-1 on the swing guide plate 7, and the notch 10-1 on the other side of the sliding plate 10 is used to pass through the fastener and facilitate the adjustment of its position. The plate 10 is connected to the swing guide plate 7 and adjusts the width of the weld seam. In the present invention, the guiding lug on the sliding plate 10 can also be arranged on the guiding groove on the swinging guiding plate 7, and the fastener 5 connects the sliding plate 10 on the swinging guiding plate 7, and the sliding plate 10 is also adjusted to realize the welding seam. Width adjustment. The indicator line on the swing guide plate 7 of the present invention is the reference line, and the indicator line on the slide plate 10 is the scale line of the weld width. By adjusting the position of the slide plate 10 on the swing guide plate 7, it is possible to visually observe the The weld width tick marks control the weld width.

As shown in Figures 1 and 7, when the present invention works, when the DC motor 1 rotates to drive the eccentric wheel 3 to rotate, the eccentric wheel 3 drives the connecting rod 6 to move, drives the swing guide plate 7 fixed on the base plate 4 to swing, and finally drives and swings The sliding plate 10 connected to the guide plate 7 swings, and the sliding plate 10 drives the welding torch 8 to swing, and the swing frequency of the welding torch 8 is directly determined by the rotation speed of the DC motor 1. FIG. 8 is the swing trajectory of the welding torch end of the present invention.

As shown in Figure 1, when the weld width needs to be adjusted, first loosen the fastener 5 connected to the slide plate 10 and the swing guide plate 7, then move the slide plate 10 to the required weld width scale line, and finally Screw the fastener 5 to fix the slide plate 10 on the swing guide plate 7 . And when adjusting the height of the weld seam, loosen the fasteners connected to the slide plate 10 and the clamping block 9, adjust the height position of the welding torch 8 to the required requirements, then tighten the fasteners to fix the clamping block 9 on the slide board 10.

Claims (5)

1. the balance arc device for metal automatic welding, it is characterized in that: comprise welding gun (8) and swinging arc toggle and welding gun and clamp and weld width governor motion, described swinging arc toggle comprises substrate (4), direct current generator (1), eccentric wheel (3) and connecting rod (6) and swing guide plate (7), direct current generator (1) is connected on substrate (4), the output shaft (1-1) of direct current generator (1) is connected with eccentric wheel (3), the both sides of connecting rod (6) are hinged on eccentric wheel (3) respectively and swing on guide plate (7), and swing guide plate (7) is fixed on substrate (4), described welding gun clamping comprises sliding panel (10) and clamp (9) with weld width governor motion, the barral of a gun (8-1) of welding gun (8) to be arranged between sliding panel (10) and clamp (9) and can axial adjustment, adjustable being arranged on of sliding panel (10) swings on guide plate (7), swing guide plate (7) and sliding panel (10) are provided with weld width index line, described sliding panel (10) is provided with notch (10-1) or guiding projection, the guiding projection (7-1) swung on guide plate (7) is arranged in the notch (10-1) of sliding panel (10), or the guiding projection on sliding panel (10) is arranged in the gathering sill in swing guide plate (7), sliding panel (10) is connected to and swings on guide plate (7) by securing member (5), the index line swung on guide plate (7) is datum line, and the index line on sliding panel (10) is weld width graduation mark.

2. the balance arc device for metal automatic welding according to claim 1, it is characterized in that: described sliding panel (10) is U-shaped structure, sliding panel (10) both sides are respectively equipped with centrally symmetrical notch (10-1).

3. the balance arc device for metal automatic welding according to claim 1, it is characterized in that: described eccentric wheel (3) is provided with installing hole (3-1), the installing hole (3-1) of eccentric wheel (3) is enclosed within direct current generator (1) output shaft (1-1) and is connected by securing member or key, and the eccentric shaft (3-2) on eccentric wheel (3) is connected with connecting rod (6).

4. the balance arc device for metal automatic welding according to claim 1, it is characterized in that: described direct current generator (1) is arranged on the motor cabinet (2) in dihedral, and the opposite side of motor cabinet (2) is arranged on the side of substrate (4) by securing member.

5. a kind of balance arc device for metal automatic welding according to claim 1, it is characterized in that: barral of a gun (8-1) length of described welding gun (8) is at 500-800mm, and barral of a gun (8-1) bottom bend angle beta 130-145 °.