CN110961762A

CN110961762A - Arc welding robot control system based on PLC control

Info

Publication number: CN110961762A
Application number: CN201911180263.4A
Authority: CN
Inventors: 林国盛
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2020-04-07

Abstract

The invention discloses a PLC-based control system of an arc welding robot, which comprises a base, a PLC programmable controller, a lower swing arm, an upper swing arm, a rotary arm and a welding mechanism, wherein the welding mechanism consists of a welding gun, a positioning telescopic mechanism, a splash guard, a thread groove, a telescopic rod and a limiting support ring, the PLC programmable controller is used for controlling the positioning telescopic mechanism to drive the splash guard to move up and down on the surface of the welding gun so as to protect the protection work of a user and the arc welding robot, the splash guard can drive the oscillating mechanism to rotate through the thread groove by the welding gun, the oscillating mechanism can knock the inner wall of the welding gun so as to lead welding slag on the outlet at the bottom end of the oscillating mechanism to fall off, thereby avoiding the blockage of a wire outlet of the welding gun, the welding slag on the surface of the welding gun is scraped by a heat dissipation scraper, the heat dissipation effect is provided when the, the manual labor force is reduced.

Description

Arc welding robot control system based on PLC control

Technical Field

The invention relates to the field of Programmable Logic Controllers (PLC), in particular to a control system for controlling an arc welding robot based on PLC.

Background

The arc welding robot is mainly applied to the welding production of various automobile parts, and is an industrial robot for automatic arc welding, and the composition and the principle of the arc welding robot are basically the same as those of a spot welding robot; when the existing arc welding robot uses a welding gun for welding, sparks are sputtered, a user cannot be protected through system control, the arc welding robot cannot be protected through the system control, the arc welding robot needs to be manually maintained after being used, the service life durability of the arc welding robot is guaranteed, and the labor amount is increased.

Disclosure of Invention

Aiming at the defects of the prior art, the invention is realized by the following technical scheme: a control system based on PLC control arc welding robot structurally comprises a machine base, a PLC programmable controller, a lower swing arm, an upper swing arm, a rotating arm and a welding mechanism, wherein the PLC programmable controller is installed inside the machine base;

welding mechanism constitute by welder, location telescopic machanism, splashproof cover, thread groove, telescopic link, spacing support ring, the inboard intermediate position of splashproof cover on install welder, welder on the surface be equipped with the thread groove, the thread groove have spacing support ring, welder and spacing support ring fixed connection, splashproof cover top right side on be equipped with the telescopic link, splashproof cover and telescopic link be connected, splashproof cover top left side on install location telescopic machanism.

As a further optimization of the technical scheme, the positioning telescopic mechanism comprises an electric hydraulic cylinder, a telescopic push-pull rod and a sliding sheet, the telescopic push-pull rod is arranged below the electric hydraulic cylinder, the electric hydraulic cylinder is mechanically connected with one end of the telescopic push-pull rod, the sliding sheet is arranged at the other end of the telescopic push-pull rod, and the telescopic push-pull rod is fixedly connected with the sliding sheet.

As the further optimization of the technical scheme, the splash guard further comprises an oscillating mechanism and an annular guide rail, the annular guide rail is arranged at the top end of the splash guard, the four oscillating mechanisms are distributed on the inner side of the splash guard at equal intervals, and the splash guard is connected with the oscillating mechanism.

As a further optimization of this technical scheme, oscillating mechanism constitute by bracing piece, arc attaching plate, coil spring, fixed axle, swinging arms, one of bracing piece serve and be equipped with arc attaching plate, bracing piece and arc attaching plate fixed connection, arc attaching plate on the surface be equipped with the fixed axle, arc attaching plate and fixed axle adopt clearance fit, the fixed axle on the surface equidistant distribution be equipped with three swinging arms, fixed axle and swinging arms mechanical connection, the fixed axle install the coil spring on the surface.

As a further optimization of the technical scheme, the middle position of the inner side surface of the arc-shaped attaching plate is provided with a heat dissipation scraper, and the arc-shaped attaching plate and the heat dissipation scraper are welded through electric welding.

As a further optimization of the technical scheme, the telescopic rod and the telescopic push-pull rod are parallel to each other and are positioned on the same horizontal plane.

As further optimization of the technical scheme, the PLC is electrically connected with the welding mechanism.

As the further optimization of the technical scheme, the splash guard is made of polycarbonate materials, is high-temperature resistant and impact resistant, and cannot be stuck by sparks.

As the further optimization of the technical scheme, the inner side position of the top end of the splash guard is provided with a raised thread which is used for matching with the thread groove on the surface of the welding gun to rotate.

Advantageous effects

The invention relates to a control system based on control arc welding robot, when a rotating arm is welded by a welding gun, a PLC programmable controller is used for controlling an electric hydraulic cylinder to work, the electric hydraulic cylinder converts electric energy into kinetic energy by a telescopic push-pull rod, the telescopic push-pull rod drives a splash guard to move downwards, the splash guard is meshed with a thread groove on the surface of the welding gun through a raised thread, so that the splash guard is driven to rotate and descend, the telescopic push-pull rod can only be matched with an annular guide rail on the splash guard to rotate and slide through a sliding sheet, the splash guard is connected with the annular guide rail in a sliding way by a telescopic rod to stabilize the rotation and descending work of the splash guard, the range of splashed sparks during the work of the welding gun can be controlled by the upward and downward movement of the splash guard, the arc-shaped binding plate is driven to rub against the surface of the welding, the inner wall of the welding gun is knocked when the swing rod rotates due to the fact that the fixed shaft transmits the swing rod, welding slag on the bottom outlet of the swing rod drops, blockage of a wire outlet hole of the welding gun is avoided, the arc-shaped attaching plate utilizes the heat dissipation scraper to scrape off welding slag on the surface of the welding gun, and a heat dissipation effect is provided for the welding gun during working.

Compared with the prior art, the invention has the beneficial effects that: utilize PLC programmable controller control location telescopic machanism to drive the splashproof cover and reciprocate on the welder surface, the protection work of protection user and arc welding robot, welder lets the splashproof cover can drive the rotatory work of oscillating mechanism through the thread groove, let oscillating mechanism beat the welder inner wall, let the welding slag on its bottom export drop, avoid causing the jam of welder wire outlet, utilize the heat dissipation scraper blade to strike off the welding slag on the welder surface, and provide the radiating effect for welder during operation, the maintenance of butt welder has been improved, and welder's life has been increased, the hand labor has been reduced.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic structural diagram of a control system for controlling an arc welding robot based on a PLC according to the present invention.

FIG. 2 is a schematic structural view of the welding mechanism in a static state in front view.

Fig. 3 is a schematic structural view of a front cross-section working state of the welding mechanism of the present invention.

Fig. 4 is a schematic top view of the welding mechanism of the present invention.

FIG. 5 is an enlarged view of A in FIG. 2 according to the present invention.

Fig. 6 is a schematic structural diagram of the oscillating mechanism of the present invention.

In the figure: the device comprises a machine base-1, a PLC (programmable logic controller) -2, a lower swing arm-3, an upper swing arm-4, a rotating arm-5, a welding mechanism-6, a welding gun-6 a, a positioning telescopic mechanism-6 b, a splash guard-6 c, a thread groove-6 d, a telescopic rod-6 e, a limiting support ring-6 f, an electric hydraulic cylinder-6 b1, a telescopic push-pull rod-6 b2, a sliding sheet-6 b3, an oscillating mechanism-6 c1, an annular guide rail-6 c2, a support rod-6 c11, an arc-shaped jointing plate-6 c12, a coil spring-6 c13, a fixed shaft-6 c14, a swing rod-6 c15 and a heat dissipation scraper-g 1.

Detailed Description

In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easy to understand, the following description and the accompanying drawings further illustrate the preferred embodiments of the invention.

Examples

Referring to fig. 1-6, the invention provides a PLC-based arc welding robot control system, which comprises a machine base 1, a PLC programmable controller 2, a lower swing arm 3, an upper swing arm 4, a rotating arm 5, and a welding mechanism 6, wherein the PLC programmable controller 2 is installed inside the machine base 1, the lower swing arm 3 is installed on the top end of the machine base 1, the bottom ends of the machine base 1 and the lower swing arm 3 are mechanically connected, the head end of the lower swing arm 3 is provided with the upper swing arm 4, the bottom ends of the lower swing arm 3 and the upper swing arm 4 are matched, the head end of the upper swing arm 4 is provided with the rotating arm 5, the upper swing arm 4 is connected with the rotating arm 5, the surface of the rotating arm 5 is provided with the welding mechanism 6, the welding mechanism 6 is composed of a welding gun 6a, a positioning telescopic mechanism 6b, a splash guard 6c, a thread groove 6d, a telescopic rod 6e, and a limit, the inboard intermediate position of splashproof cover 6c on install welder 6a, welder 6a be equipped with thread groove 6d on the surface, thread groove 6d have spacing support ring 6f, welder 6a and spacing support ring 6f fixed connection, 6c top right side of splashproof cover on be equipped with telescopic link 6e, 6c of splashproof cover be connected with telescopic link 6e, 6c top left side of splashproof cover on install location telescopic machanism 6 b.

The positioning telescopic mechanism 6b is composed of an electric hydraulic cylinder 6b1, a telescopic push-pull rod 6b2 and a sliding piece 6b3, a telescopic push-pull rod 6b2 is arranged below the electric hydraulic cylinder 6b1, the electric hydraulic cylinder 6b1 is mechanically connected with one end of a telescopic push-pull rod 6b2, the sliding piece 6b3 is arranged at the other end of the telescopic push-pull rod 6b2, and the telescopic push-pull rod 6b2 is fixedly connected with the sliding piece 6b 3.

The sliding piece 6b3 is used to prevent the annular guide rail 6c2 on the splash guard 6c from sliding off the telescopic push-pull rod 6b 2.

The splash guard 6c still include oscillating mechanism 6c1, annular guide 6c2, splash guard 6c top on be equipped with annular guide 6c2, the inboard equidistance of splash guard 6c distribute and be equipped with four oscillating mechanism 6c1, splash guard 6c and oscillating mechanism 6c1 be connected.

The annular guide rail 6c2 is used to prevent the support frame from derailing when the splash guard 6c rotates.

The oscillating mechanism 6c1 comprises a support rod 6c11, an arc-shaped attaching plate 6c12, a coil spring 6c13, a fixed shaft 6c14 and a swinging rod 6c15, wherein one end of the support rod 6c11 is provided with the arc-shaped attaching plate 6c12, the support rod 6c11 is fixedly connected with the arc-shaped attaching plate 6c12, the surface of the arc-shaped attaching plate 6c12 is provided with the fixed shaft 6c14, the arc-shaped attaching plate 6c12 and the fixed shaft 6c14 are in clearance fit, the surface of the fixed shaft 6c14 is provided with three swinging rods 6c15 at equal intervals, the fixed shaft 6c14 is mechanically connected with the swinging rods 6c15, and the surface of the fixed shaft 6c14 is provided with the coil spring 6c 13.

The above-described coil spring 6c13 is for providing a rotary striking power source for the swinging lever 6c 15.

The middle position of the inner side surface of the arc-shaped attaching plate 6c12 is provided with a heat dissipation scraper g1, and the arc-shaped attaching plate 6c12 and the heat dissipation scraper g1 are welded through electric welding.

Telescopic link 6e and flexible push-pull rod 6b2 between the two be parallel to each other and be in same horizontal plane on, PLC programmable controller 2 be connected with welding mechanism 6 electricity, splash guard 6c adopt the preparation of polycarbonate material, high temperature resistant, the protecting against shock to can not be pasted by the spark, splash guard 6c top inboard position on be equipped with protruding screw thread for the screw thread groove 6d on the cooperation welder 6a surface is rotatory.

The principle of the invention is as follows: when the rotating arm 5 is welded by the welding gun 6a in a butt welding mode, the PLC 2 is used for controlling the electric hydraulic cylinder 6b1 to work, the electric hydraulic cylinder 6b1 converts electric energy into kinetic energy by using the telescopic push-pull rod 6b2, the telescopic push-pull rod 6b2 drives the splash guard 6c to move downwards, the splash guard 6c is meshed with a thread groove 6d on the surface of the welding gun 6a through convex threads, so that the splash guard 6c is driven to rotate and descend, the telescopic push-pull rod 6b2 can only match with an annular guide rail 6c2 on the splash guard 6c through a sliding sheet 6b3 to rotate and slide, the splash guard 6c is connected with the annular guide rail 6c2 in a sliding mode through the telescopic rod 6e to stabilize the rotation and descending work of the splash guard 6c, the splash guard 6c can control the range of sparks emitted when the welding gun 6a works by moving upwards and downwards, the splash guard 6c drives the arc-shaped joint plate 6c12, make swinging arms 6c15 receive friction drive, lead to coil spring 6c13 with elastic force, transmit for swinging arms 6c15 through fixed axle 6c14, lead to swinging arms 6c15 rotatory time to knock welder 6a inner wall, let the welding slag on its bottom exit drop, avoid causing welder 6a to go out the jam of silk hole, arc attaching plate 6c12 utilizes heat dissipation scraper g1 to scrape off the welding slag on welder 6a surface, and provide the radiating effect for welder 6a during operation.

The method for solving the problems comprises the following steps: utilize PLC programmable controller 2 control location telescopic machanism 6b to drive splatter shield 6c and reciprocate on welder 6a surface, the protection work of protection user and arc welding robot, welder 6a lets splatter shield 6c can drive oscillating mechanism 6c1 rotary work through thread groove 6d, let oscillating mechanism 6c1 beat welder 6a inner wall, let the welding slag on its bottom outlet drop, avoid causing the jam of welder 6a wire outlet, utilize heat dissipation scraper blade g1 to strike off welder 6a welding slag on the surface, and provide the radiating effect for welder 6a during operation, the maintenance of butt welder 6a has been improved, and increased welder 6 a's life, the hand labor has been reduced.

While there have been shown and described what are at present considered the fundamental principles of the invention, the essential features and advantages thereof, it will be understood by those skilled in the art that the present invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but rather, is capable of numerous changes and modifications in various forms without departing from the spirit or essential characteristics thereof, and it is intended that the invention be limited not by the foregoing descriptions, but rather by the appended claims and their equivalents.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a control system based on PLC control arc welding robot, its structure includes frame (1), PLC programmable controller (2), lower swing arm (3), goes up swing arm (4), swinging boom (5), welding mechanism (6), frame (1) internally mounted have PLC programmable controller (2), frame (1) top on be equipped with down swing arm (3), frame (1) and lower swing arm (3) bottom mechanical connection, lower swing arm (3) head end on be equipped with swing arm (4), lower swing arm (3) and last swing arm (4) bottom cooperate, last swing arm (4) head end on be equipped with swinging boom (5), last swing arm (4) and swinging boom (5) be connected, swinging boom (5) install welding mechanism (6), its characterized in that on the surface:

welding mechanism (6) constitute by welder (6a), location telescopic machanism (6b), splash guard (6c), thread groove (6d), telescopic link (6e), spacing support ring (6f), inboard intermediate position of splash guard (6c) on install welder (6a), welder (6a) be equipped with thread groove (6d) on the surface, thread groove (6d) have spacing support ring (6f), welder (6a) and spacing support ring (6f) fixed connection, splash guard (6c) top right side on be equipped with telescopic link (6e), splash guard (6c) and telescopic link (6e) be connected, splash guard (6c) top left side on install location telescopic machanism (6 b).

2. The PLC-based control arc welding robot control system according to claim 1, characterized in that: the positioning telescopic mechanism (6b) is composed of an electric hydraulic cylinder (6b1), a telescopic push-pull rod (6b2) and a sliding piece (6b3), wherein the telescopic push-pull rod (6b2) is arranged below the electric hydraulic cylinder (6b1), the electric hydraulic cylinder (6b1) is mechanically connected with one end of the telescopic push-pull rod (6b2), the sliding piece (6b3) is arranged at the other end of the telescopic push-pull rod (6b2), and the telescopic push-pull rod (6b2) is fixedly connected with the sliding piece (6b 3).

3. The PLC-based control arc welding robot control system according to claim 1, characterized in that: splash guard (6c) still include oscillating mechanism (6c1), annular guide rail (6c2), splash guard (6c) top on be equipped with annular guide rail (6c2), inboard equidistance of splash guard (6c) distribute and be equipped with four oscillating mechanism (6c1), splash guard (6c) and oscillating mechanism (6c1) be connected.

4. The PLC-based control arc welding robot control system according to claim 3, characterized in that: oscillation mechanism (6c1) constitute by bracing piece (6c11), arc rigging board (6c12), coil spring (6c13), fixed axle (6c14), swinging arms (6c15), bracing piece (6c11) one end on be equipped with arc rigging board (6c12), bracing piece (6c11) and arc rigging board (6c12) fixed connection, arc rigging board (6c12) on the surface be equipped with fixed axle (6c14), arc rigging board (6c12) and fixed axle (6c14) adopt clearance fit, fixed axle (6c14) on the surface equidistant distribution be equipped with three swinging arms (6c15), fixed axle (6c14) and swinging arms (6c15) mechanical connection, fixed axle (6c14) on the surface install coil spring (6c 13).

5. The PLC-based arc welding robot control system according to claim 4, wherein: arc attaching plate (6c12) inboard surface intermediate position on be equipped with heat dissipation scraper blade (g1), arc attaching plate (6c12) and heat dissipation scraper blade (g1) pass through electric welding.