Special welding gun with guide head for edge covering of square bar steel grating

Abstract

The utility model discloses a special welding gun with a guide head for edge covering of a square bar steel grating, which comprises a welding gun body, the guide head is arranged on a protective sleeve of the welding gun body, the guide head comprises a pipe clamp and two positioning components arranged on the pipe clamp, and each positioning component comprises a fixing plate, a first limiting plate, a second limiting plate, a telescopic rod, a rolling body and a rolling shaft. The pipe clamp is connected with the protective sleeve and connected with one end of the fixing plate, the other end of the fixing plate is connected with the first limiting plate, the first limiting plate is connected with the second limiting plate through the telescopic rod, the two inner side faces of the first limiting plate and the second limiting plate are symmetrically provided with two mounting grooves, a rolling shaft is arranged in each mounting groove, and the rolling shafts are rotationally arranged. A conductive elbow is arranged at the lower end of a conductive nozzle of the welding gun body, a positioning plate is arranged on the protective sleeve, external threads are arranged on the protective sleeve, and the positioning plate is fixed on the protective sleeve through a central threaded hole of the positioning plate. The welding seam of the square rod steel grating can be quickly positioned and guided to be welded, and the welding efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of steel grating welding equipment, in particular to a special welding gun for edging square bar steel gratings with a guide head. Background Art

[0002] The welding gun uses the high current and high voltage of the welding machine to generate heat that accumulates at the terminal of the welding gun, melting the welding wire. The molten welding wire penetrates into the part to be welded. After cooling, the welded objects are firmly connected into one. The current steel grating edging requires automatic welding of several vertical corner welds by a welding gun. Due to the tolerances caused by processes such as pressure welding and sawing of the steel grating, and the deformation of each flat steel of the steel grating after welding with the edging plate, the welding position of the next flat steel and the edging plate is affected, resulting in deviations in the welding position. The conductive nozzle of an ordinary welding gun is straight, and the welding wire comes out from the center hole of the protective nozzle. Due to the narrow welding space of the steel grating edging, the ordinary welding gun cannot be tilted to the appropriate angle and the welding wire cannot be adjusted to the accurate welding position, affecting the regularity of the steel grating shape and the welding quality; if robot welding is used, ordinary robots cannot accurately locate the welding position every time using the teaching method, and the use of robot visual scanning and positioning method will increase the completion time of each weld by about 1 / 3 of the scanning and positioning time, seriously affecting the welding efficiency. If it is completed manually, a steel grating with an outer size of 1mX4m will have more than a thousand welds when fully welded. The welding positioning is difficult, and it takes two welders one day to process one piece, and it also costs more than a thousand welding fees. Manual welding is inefficient. Utility Model Content

[0003] The utility model provides a special welding gun for edging square bar steel grating with a guide head, which solves the problem that traditional argon arc welding guns cannot quickly locate the full weld seam of steel grating, resulting in low welding efficiency and high manual welding cost.

[0004] The utility model provides a special welding gun for edging square bar steel grating with a guide head, comprising a welding gun body, a guide head arranged on the protective cover of the welding gun body, the guide head comprising a pipe clamp and two positioning components arranged on the pipe clamp, each positioning component comprising a fixed plate, a first limiting plate, a second limiting plate, a telescopic rod, a rolling body, and a rolling shaft, the pipe clamp is connected to the protective cover, the pipe clamp is connected to one end of the fixed plate, the other end of the fixed plate is connected to the first limiting plate, the first limiting plate is connected to the second limiting plate through the telescopic rod, two mounting grooves are symmetrically arranged on the inner side surfaces of the first limiting plate and the second limiting plate, a plurality of rolling shafts are arranged in each mounting groove, a rolling body is rotatably arranged on each rolling shaft, and a conductive elbow is arranged at the lower end of the conductive nozzle of the welding gun body.

[0005] In the above technical solution, further, a positioning plate is provided on the protective sleeve, an external thread is provided on the outer wall of the protective sleeve, and the positioning plate is threadedly fixed to the external thread of the protective sleeve through a central threaded hole thereof.

[0006] In the above technical solution, further, the telescopic rod includes a fixed rod, a guide rod, and a telescopic spring. One end of the fixed rod is fixedly connected to the first limit plate, and the other end is axially provided with a guide hole. One end of the guide rod is fixedly connected to the second limit plate, and the other end is partially inserted into the guide hole. A telescopic spring is sleeved on the guide rod, and one end of the telescopic spring is elastically fixedly connected to the fixed rod, and the other end is elastically fixedly connected to the limit boss arranged on the outer wall of the guide rod along the circumferential direction.

[0007] In the above technical solution, further, the telescopic spring is a tension spring.

[0008] In the above technical solution, further, the first limiting plate and the second limiting plate are respectively connected to the pipe clamp through a plurality of first screws.

[0009] In the above technical solution, further, the pipe clamp and the side wall of the protective sleeve are positioned and fixed by a second screw.

[0010] It can be seen from the above technical solutions that the utility model provides a special welding gun for edging square bar steel grating with a guide head.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The utility model installs a guide head on the protective cover of the welding gun body, guides the welding gun body to be inserted into the grille hole of the steel grating for welding through the guide head, and cooperates with the two steel plates connected to the weld seam through two positioning components, so that the first limit plate and the second limit plate of the two positioning components respectively contact the steel plate through their corresponding rolling bodies during the downward movement and clamp the two side surfaces of the steel plate to guide the movement downward for welding positioning, so that the conductive elbow of the welding gun body guides the welding wire to bend from the vertical direction to the horizontal direction to weld the vertical weld of the steel grating, with high welding efficiency, reduced positioning difficulty during welding, guaranteed consistency in the appearance of each weld, no empty weld phenomenon, and increased welding strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for implementation. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0014] Figure 1 This is a top view of the structure of a special welding gun for square bar steel grating hemming with a guide head proposed by the utility model in use;

[0015] Figure 2 This is a schematic diagram of the installation position structure of the pipe clamp of a special welding gun for square bar steel grating hemming with a guide head proposed by the utility model on the welding gun body;

[0016] Figure 3 The utility model provides a schematic diagram of the installation structure of the positioning assembly of a special welding gun for square bar steel grating edging with a guide head.

[0017] Figure 4 The utility model provides a schematic cross-sectional view of the overflow pipe structure of a special welding gun for square bar steel grating edging with a guide head.

[0018] In the picture:

[0019] 1- welding gun body; 11- protective cover; 12- conductive nozzle; 13- conductive elbow; 14- positioning plate;

[0020] 2- pipe clamp;

[0021] 3-positioning assembly; 31-fixed plate; 32-first limiting plate; 33-second limiting plate; 34-telescopic rod; 35-rolling element; 36-rolling shaft; 37-mounting slot; 341-fixed rod; 342-guide rod; 343-telescopic spring; 344-guide hole; 345-limiting boss.

[0022] 4-Steel grating; 41-Steel plate; 42-Welding seam; 43-Welding wire. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0024] Example 1:

[0025] See also Figure 1-4A special welding gun for square bar steel grating hemming with a guide head includes a welding gun body 1, a guide head is set on the protective cover 11 of the welding gun body 1, and the guide head includes a pipe clamp 2 and two positioning components 3 set on the pipe clamp 2. The pipe clamp 2 is made of PVC material. The open end of the pipe clamp 2 facilitates the protective cover 11 to enter the pipe clamp 2 and fix it. The pipe clamp 2 is used to install and fix the two positioning components 3 on the welding gun body 1. Each positioning component 3 includes a fixing plate 31, a first limiting plate 32, and a second limiting plate 33, telescopic rod 34, rolling body 35, rolling shaft 36, the outer clamp of pipe clamp 2 is fixedly connected to the outer wall of protective sleeve 11, pipe clamp 2 is fixedly connected to one end of fixing plate 31, the other end of fixing plate 31 is welded and fixedly connected to the first limiting plate 32, the first limiting plate 32 is connected to the second limiting plate 33 through telescopic rod 34, the distance between the first limiting plate 32 and the second limiting plate 33 can be adjusted by telescopic rod 34, so that the first limiting plate 32 can be limited to the steel plate through the second limiting plate 33 and telescopic rod 34. On the side surface corresponding to the weld of the plate 41, two vertical mounting grooves 37 are symmetrically provided on the inner side surfaces of the first limiting plate 32 and the second limiting plate 33. Three horizontal rolling shafts 36 are provided in each mounting groove 37. The two ends of the rolling shaft 36 are fixedly connected to the two inner side walls of the mounting groove 37. A rolling body 35 is rotatably provided on each rolling shaft 36. The rolling body 35 is cylindrical and is sleeved on the rolling shaft 36 through its axial through hole and can rotate relative to the rolling shaft 36. The rolling surface of the rolling body 35 is partially exposed. The mounting groove 37 is provided so that when the inner side surface of the first limit plate 32 approaches the side surface of the steel plate, the rolling surface of the rolling body 35 first contacts the side surface of the steel plate. The first limit plate 32 can be rolled in cooperation with the side surface of the steel plate through the rolling body 35. The rolling body 35 is guided to move vertically by the side surface of the steel plate, which can facilitate the driving of the welding gun body 1. A conductive elbow 13 is provided at the lower end of the conductive nozzle 12 of the welding gun body 1. The conductive elbow 13 is used to guide the welding wire 43 to bend from the vertical direction to the horizontal direction to weld the vertical weld 43 of the steel grating.

[0026] In this embodiment, see Figure 1 、 2 A horizontal positioning plate 14 is provided on the protective cover 11. The positioning plate 14 is circular, and an external thread is provided on the outer wall of the protective cover 11. The positioning plate 14 is threadedly fixed to the external thread of the protective cover 11 through its central threaded hole. The threaded connection structure facilitates the adjustment of the installation height of the positioning plate 14 on the protective cover 11. During the vertical welding process of the welding gun, the installation height of the positioning plate 14 is adjusted by the length of the weld. When the weld is welded to the lowest point, the bottom surface of the positioning plate 14 touches the upper end surface of the steel plate 41 of the steel grating 4, which is convenient for protecting the welding gun and preventing the welding gun body 1 from continuing to move downward to cause empty welding, thereby increasing the effectiveness of welding and increasing the efficiency of welding.

[0027] In this embodiment, see Figure 1 、 34. The telescopic rod 34 includes a fixed rod 341, a guide rod 342, and a telescopic spring 343. One end of the fixed rod 341 is fixedly connected to the first limit plate 32, and the other end is axially provided with a guide hole 344. One end of the guide rod 342 is fixedly connected to the second limit plate 33, and the other end is partially sleeved in the guide hole 344. The telescopic spring 343 is sleeved on the guide rod 342. One end of the telescopic spring 343 is elastically fixedly connected to the fixed rod 341, and the other end is elastically fixedly connected to a limiting boss 345 provided on the outer wall of the guide rod 342 along the circumferential direction.

[0028] In this embodiment, specifically, the telescopic spring 343 is a tension spring. Through the tensioning action of the telescopic spring 343, the first limiting plate 32 and the second limiting plate 33 can be elastically limited to the two sides of the steel plate, thereby realizing the rapid positioning of the first limiting plate 32 and the second limiting plate 33, preventing the welding gun body 1 from moving horizontally or vertically, ensuring that the welding wire 43 is positioned and moved along the vertical weld, increasing the welding accuracy, ensuring the consistency of the weld, and preventing the occurrence of empty welding, thereby increasing the strength of the welding.

[0029] In this embodiment, see Figure 1 、 2 Specifically, the first limiting plate 32 and the second limiting plate 33 are respectively connected to the pipe clamp 2 through a plurality of first screws. The first limiting plate 32 and the second limiting plate 33 are respectively provided with screw holes, and threaded holes are provided at corresponding positions on the side wall of the pipe clamp 2. The first screws pass through the screw holes and are threadedly connected to the threaded holes on the side wall of the pipe clamp 2. The first limiting plate 32 and the second limiting plate 33 are easy to remove from the pipe clamp 2 for repair and maintenance.

[0030] In this embodiment, see Figure 1 、 2 Specifically, the pipe clamp 2 and the side wall of the protective cover 11 are positioned and fixed by a second screw, and the pipe clamp 2 and the protective cover 11 are detachably connected and fixed by the second screw, so that the installation height of the pipe clamp 2 can be quickly adjusted according to different weld lengths, thereby realizing welding of welds of different lengths.

[0031] It can be seen from the above technical solution that when in use, the welding gun body 1 is installed on a manipulator or a CNC machine tool, the guide head is installed on the protective cover 11 of the welding gun body 1, the weld position is located by a visual sensor, and the welding is guided by the guide head. First, the welding gun body 1 is driven by a manipulator or a CNC machine tool to insert into the grille hole of the steel grating 4. During the process, the two positioning components 3 are respectively coordinated with the two steel plates 41 connected to the weld 42 for positioning. During the downward movement of the first limit plate 32 and the second limit plate 33 of one positioning component 3, the corresponding rolling body 35 first contacts the steel plate 41 and clamps the two sides of the steel plate 41, and guides it downward along the side of the steel plate 41, so that the conductive elbow 13 of the welding gun body 1 guides the welding wire 43 to bend from the vertical direction to the horizontal direction to weld the vertical weld 43 of the steel grating. When the weld is welded to the lowest point, the installation height of the positioning plate 14 is used to facilitate the limiting of the welding depth of the welding gun.

[0032] Those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered merely as exemplary; the true scope of the invention is indicated by the claims.

[0033] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The above-described embodiments of the present invention do not constitute a limitation on the scope of protection of the present invention.

Claims

1. A special welding gun for square bar steel grating hemming with a guide head, comprising a welding gun body (1), characterized in that: A guide head is provided on the protective cover (11) of the welding gun body (1), and the guide head includes a pipe clamp (2) and two positioning components (3) provided on the pipe clamp (2), each positioning component (3) includes a fixed plate (31), a first limiting plate (32), a second limiting plate (33), a telescopic rod (34), a rolling body (35), and a rolling shaft (36), the pipe clamp (2) is connected to the protective cover (11), the pipe clamp (2) is connected to one end of the fixed plate (31), and the fixed plate (3 1) The other end is connected to a first limiting plate (32), the first limiting plate (32) is connected to the second limiting plate (33) through a telescopic rod (34), two mounting grooves (37) are symmetrically arranged on the inner side surfaces of the first limiting plate (32) and the second limiting plate (33), a plurality of rolling shafts (36) are arranged in each of the mounting grooves (37), and a rolling body (35) is rotatably arranged on each of the rolling shafts (36), and a conductive elbow (13) is arranged at the lower end of the conductive nozzle (12) of the welding gun body (1).

2. The special welding gun for square bar steel grating hemming with a guide head according to claim 1 is characterized in that: A positioning plate (14) is provided on the protective sleeve (11), an external thread is provided on the outer wall of the protective sleeve (11), and the positioning plate (14) is threadedly fixed on the external thread of the protective sleeve (11) through its central threaded hole.

3. The special welding gun for square bar steel grating hemming with a guide head according to claim 1 is characterized in that: The telescopic rod (34) includes a fixed rod (341), a guide rod (342), and a telescopic spring (343). One end of the fixed rod (341) is fixedly connected to the first limiting plate (32), and the other end is provided with a guide hole (344) along the axial direction. One end of the guide rod (342) is fixedly connected to the second limiting plate (33), and the other end is partially sleeved in the guide hole (344). The telescopic spring (343) is sleeved on the guide rod (342). One end of the telescopic spring (343) is elastically fixedly connected to the fixed rod (341), and the other end is elastically fixedly connected to a limiting boss (345) provided on the outer wall of the guide rod (342) along the circumferential direction.

4. The special welding gun for square bar steel grating hemming with a guide head according to claim 3 is characterized in that: The telescopic spring (343) is a tension spring.

5. The special welding gun for square bar steel grating hemming with a guide head according to claim 1 is characterized in that: The first limiting plate (32) and the second limiting plate (33) are respectively connected to the pipe clamp (2) via a plurality of first screws.

6. The special welding gun for square bar steel grating hemming with a guide head according to claim 1 is characterized in that: The pipe clamp (2) and the side wall of the protective sleeve (11) are positioned and fixed by a second screw.

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