Four-station rotary welding mechanism

Abstract

The invention discloses a four-station rotary welding mechanism which is mainly used in the field of automobile body-in-white welding. The cam divider is installed on the fixing plate, the stepping motor and the cam divider are connected with the motor installation plate, an output shaft of the stepping motor and an input shaft of the cam divider are respectively provided with a synchronous belt wheel, the synchronous belt wheels are connected through a synchronous belt, and an output shaft of the cam divider is provided with an index plate. A slide rail mounting plate and a linear bearing are respectively mounted in four symmetrical directions of the index plate, a slide rail is mounted on the slide rail mounting plate, a guide rod is mounted in the linear bearing, a compression spring is sleeved on the guide rod, the slide rail is connected with a clamp mounting seat in a sliding manner, and the guide rod is fixedly connected with the clamp mounting seat; an input shaft of the cam divider is provided with induction iron, and an inductor support and a proximity switch are arranged beside the induction iron. The device is high in universality, convenient to switch, good in flexibility and high in welding efficiency, the machining, manufacturing, maintaining and labor cost can be greatly reduced, potential safety hazards in the welding process are eliminated, and the welding positioning stability and the manufacturing quality are improved.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical manufacturing, in particular to a high-flexibility four-station rotary welding mechanism used for welding standard parts in an automated production line. Background Art

[0002] In the prior art, in the automated production of automobile body-in-white standard parts welding, for small workpieces that only have one standard part to be welded, because the workpiece is small and only one standard part is to be welded, there is usually no tooling fixture, and the workpiece is manually held and welded at a fixed point. This will lead to increased labor costs, low production efficiency, and very large safety hazards. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a four-station rotary welding mechanism to facilitate switching of workpieces and improve welding efficiency.

[0004] To achieve the above-mentioned purpose of the invention, the cam divider of the present invention is installed on a fixed plate by bolts, the stepper motor and the cam divider are connected to the motor mounting plate, the output shaft of the stepper motor and the input shaft of the cam divider are respectively equipped with synchronous pulleys, the two synchronous pulleys are connected by a synchronous belt, and the output shaft of the cam divider is equipped with a dividing plate; the four symmetrical directions of the dividing plate are respectively equipped with a slide rail mounting plate and a linear bearing, the slide rail mounting plate is equipped with a slide rail, the linear bearing is equipped with a guide rod, a compression spring is sleeved on the guide rod, the slide rail is slidably connected to the fixture mounting seat, and the guide rod is connected and fixed to the fixture mounting seat; an induction iron is installed on the input shaft of the cam divider, a sensor bracket and a proximity switch are installed next to the induction iron, and the proximity switch is installed on the sensor bracket.

[0005] Furthermore, four sets of fixture assemblies are evenly installed on the dividing plate at 90 degrees, forming four workstations: a loading workstation, a welding workstation, a testing workstation, and a unloading workstation; and the fixture assemblies are connected and fixed to the fixture mounting seat.

[0006] Furthermore, there are two linear bearings in the four symmetrical directions of the dividing plate respectively; the bottom surface of the fixture mounting seat is pressed on the upper plane of the compression spring, and the lower plane of the compression spring is against the upper plane of the linear bearing.

[0007] Furthermore, the fixture mounting seat can float up and down under pressure during welding operation.

[0008] Compared with the prior art, the present invention is mainly used for the automated production line for welding standard parts of automobile body-in-white, has strong versatility, convenient switching, good flexibility, high welding efficiency, can greatly reduce processing, manufacturing, maintenance and labor costs, eliminate safety hazards in the welding process, and improve welding positioning stability and manufacturing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural diagram of the present invention.

[0010] Figure 2 for Figure 1 A simplified diagram of the structure in the other direction.

[0011] Figure 3 for Figure 1 Top view of the . DETAILED DESCRIPTION

[0012] like Figure 1 , Figure 2 , Figure 3 As shown, the cam divider 13 of the present invention is installed on the fixed plate 1 by bolts, the stepper motor 2 and the cam divider 13 are connected to the motor mounting plate 3, the output shaft of the stepper motor 2 and the input shaft of the cam divider 13 are respectively equipped with synchronous pulleys 4, the two synchronous pulleys 4 are connected by a synchronous belt 5, and the output shaft of the cam divider 13 is equipped with a dividing plate 6, and the dividing plate 6 is evenly installed with four sets of fixture assemblies 12 at 90 degrees to form a loading station 18, a welding station 19, a detection station 20, and a unloading station 21. The fixture assembly 12 is connected and fixed to the fixture mounting seat 11; the four symmetrical directions of the dividing plate 6 are respectively equipped with a slide rail mounting plate 9, two linear bearings 7, and the slide rail mounting plate 9 A slide rail 10 is installed on it, and the slide rail 10 is slidably connected to the fixture mounting seat 11; a guide rod 17 is installed in the linear bearing 7, and a compression spring 8 is sleeved on the guide rod 17. The guide rod 17 is connected and fixed to the fixture mounting seat 11, and the bottom surface of the fixture mounting seat 11 is pressed on the upper plane of the compression spring 8, and the lower plane of the compression spring 8 is against the upper plane of the linear bearing 7. The fixture mounting seat 11 can float up and down under pressure during welding to adapt to welding electrodes of different heights, ensuring that the workpiece and the welding electrode fit well and have good adaptability; an induction iron 16 is installed on the input shaft of the cam divider 13, and a sensor bracket 15 and a proximity switch 14 are installed next to the induction iron 16, and the proximity switch 14 is installed on the sensor bracket 15.

[0013] At the origin loading station 18, the induction iron 16 is aligned with the proximity switch 14, and the proximity switch 14 light is on. Since the induction iron 16 is connected to the input shaft of the cam divider 13, when the input shaft of the cam divider 13 rotates, the induction iron 16 rotates accordingly and moves away from the proximity switch 14, and the proximity switch 14 light is off. After the input shaft of the cam divider 13 rotates completely for one circle, the induction iron 16 is aligned with the proximity switch 14 again, and the proximity switch 14 light is on again. The PLC receives the signal and the stepper motor 2 stops rotating; that is, when the cam divider 13 and the dividing plate 6 rotate, the proximity switch 14 light is off. When the cam divider 13 and the dividing plate 6 stop rotating and the fixture assembly 12 reaches four stations, the proximity switch 14 light is on. When the stepper motor 2 receives the signal of completion of loading, it drives the input shaft of the cam divider 13 to rotate one circle, and the output shaft of the cam divider 13 drives the fixture assembly 12 on the indexing plate 6 to rotate a quarter of a circle, that is, to the welding station 19; start welding, after the stepper motor 2 receives the signal of completion of welding, it drives the input shaft of the cam divider 13 to rotate one circle, and the output shaft of the cam divider 13 drives the fixture assembly 12 on the indexing plate 6 to rotate a quarter of a circle, that is, to the detection station 20; the light of the proximity switch 14 is on, the cam divider 13 stops rotating, and the detection starts. After the stepper motor 2 receives the signal of completion of detection, it drives the input shaft of the cam divider 13 to rotate one circle, and the output shaft of the cam divider 13 drives the fixture assembly 12 on the indexing plate 6 to rotate a quarter of a circle, that is, to the unloading station 21; the light of the proximity switch 14 is on, the cam divider 13 stops rotating, and the fixture assembly 12 is opened, and the unloading is completed. The cam divider 13 rotates continuously in a cycle, and the loading, welding, detection, and unloading actions are completed in sequence.

Claims

1. A four-station rotary welding mechanism, characterized in that: The cam divider (13) is mounted on the fixing plate (1) by means of bolts. The stepper motor (2) and the cam divider (13) are connected to the motor mounting plate (3). The output shaft of the stepper motor (2) and the input shaft of the cam divider (13) are respectively provided with synchronous pulleys (4). The two synchronous pulleys (4) are connected by means of a synchronous belt (5). The output shaft of the cam divider (13) is provided with a dividing plate (6). The four symmetrical directions of the dividing plate (6) are respectively provided with slide rail mounting plates (9) and linear bearings (7). A slide rail (10) is mounted on a slide rail mounting plate (9), a guide rod (17) is mounted in a linear bearing (7), a compression spring (8) is sleeved on the guide rod (17), the slide rail (10) is slidably connected to a fixture mounting seat (11), and the guide rod (17) is fixedly connected to the fixture mounting seat (11); an induction iron (16) is mounted on an input shaft of a cam divider (13), a sensor bracket (15) and a proximity switch (14) are mounted next to the induction iron (16), and the proximity switch (14) is mounted on the sensor bracket (15).

2. The four-station rotary welding mechanism according to claim 1 is characterized in that: Four sets of fixture assemblies (12) are evenly distributed at 90 degrees on the indexing plate (6), forming four workstations: a loading workstation (18), a welding workstation (19), a testing workstation (20), and a unloading workstation (21); the fixture assemblies (12) are connected and fixed to the fixture mounting seat (11).

3. The four-station rotary welding mechanism according to claim 1 is characterized in that: The dividing plate (6) has two linear bearings (7) in four symmetrical directions respectively; the bottom surface of the clamp mounting seat (11) is pressed on the upper plane of the compression spring (8), and the lower plane of the compression spring (8) is pressed against the upper plane of the linear bearing (7).

4. The four-station rotary welding mechanism according to claim 1 is characterized in that: The clamp mounting seat (11) can float up and down when under pressure during welding operation.

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