CN116786946A - Girth welding device for net rack rod piece and end fitting - Google Patents

Abstract

The invention relates to the technical field of steel pipe processing devices, and specifically to a circumferential welding device for grid rods and end fittings, which includes a robot arm, a cone-head bolt matching mechanism and a steel pipe circumferential welding mechanism; the cone-head bolt matching mechanism includes a matching base , sliding track, bolt extractor, cone head support holder and cone head magnetic holder. High-strength bolts, cone heads and sleeves form the cone head assembly; both ends of the steel pipe ring welding mechanism are equipped with welding guns and cone head buffer fixations. and the steel pipe fixed rotator. The cone head buffer holder and steel pipe fixed rotator on the right end move along the length of the support base until there is a 1~3mm gap between the end of the steel pipe and the large head of the cone head. The welding gun is on the top surface of the gap. Three-point electric welding is performed on the two sides, and the fixed rotator of the steel pipe drives the steel pipe and the cone head assembly to roll to complete the circumferential welding of the steel pipe and the cone head; the entire operation process of the invention is controllable and avoids the need for the bolt rod to penetrate the cone head again during the construction phase. Cumbersome operation.

Description

A circumferential welding device for grid rods and end fittings

Technical field

The invention relates to the technical field of steel pipe processing devices, and specifically to a circumferential welding device for grid rods and end fittings.

Background technique

After the steel pipe is rolled and formed, the weld seam is cleaned and other processes, it is then welded with bolts and cone heads (sealing plates are used when the diameter of the steel pipe is small) to form the rods of the bolt ball grid structure. The center of the cone head is provided with a through hole that allows the threaded section of the bolt to protrude. During installation, put a long hexagonal sleeve on the threaded section of the bolt extending out of the cone head, connect the bolt and the long hexagonal sleeve with a pin or fastening screw, and directly twist the long hexagonal sleeve. The pin or fastening screw drives the bolt to rotate, so that the bolt is screwed into the ball until the bolt head is in close contact with the inner surface of the sealing plate or cone head, and the installation is completed.

Chinese patent CN 110480295A discloses an automatic bolt placement unit of a grid connecting rod automatic welding production system. The bolts are placed into the end of the steel pipe through an automatic bolt placement electronic control device, and then through a sealing plate or cone head pushing device and an automatic bolt placement unit. The welding unit completes the welding work of the steel pipe and the cone head. However, during the construction of the rod, workers usually need to support the rod body so that the rod of the bolt passes through the round hole of the cone head. The electronic control device that automatically inserts the bolt can only ensure the orientation of the bolt inside the steel pipe, but cannot control the real-time angle between the bolt shaft and the center line of the steel pipe. Therefore, the worker needs to make multiple attempts after setting up the rod body before the bolt rod can be properly aligned. Pass through the round hole of the cone head, and then operate the bolt and cone head at the other end of the steel pipe again. The number of attempts is uncontrollable and the operation is cumbersome.

Contents of the invention

In view of the shortcomings of the above-mentioned prior art, the present invention provides a girth welding device for grid rods and end fittings, which stably connects the bolts and the cone heads before the welding process of the cone heads and the steel pipes, ensuring that the bolts and the cone heads are securely connected. After the cone head and the steel pipe are welded, the end of the bolt faces the steel pipe, and the bolt's rod passes through the cone head. The entire operation process is controllable, avoiding the tedious operation of the bolt's rod passing through the cone head again during the construction stage.

A girth welding device for grid rods and end fittings, including a robot arm, a cone-head bolt matching mechanism and a steel pipe girth welding mechanism;

The cone head bolt matching mechanism includes a matching base, a sliding track, a bolt extractor, a cone head support holder and a cone head magnetic holder. The cone head support holder and cone head magnetic holder are used to place the cone head, and the bolt extractor is used to place the cone head. The round ends of high-strength bolts are absorbed, and the high-strength bolts are equipped with rectangular grooves;

The bolt extractor moves along the sliding track and pushes the shank of the high-strength bolt into the round hole that passes through the small head of the cone. A robot arm grabs the sleeve so that the sleeve covers the shank of the high-strength bolt. The through-thread of the sleeve The hole is aligned with the rectangular groove of the high-strength bolt. Another robot arm grabs the pin and rotates the pin into the through-screw hole of the sleeve. It is used to connect the sleeve to the high-strength bolt. It consists of a high-strength bolt, a cone head, a sleeve and a pin. Cone head assembly;

Both ends of the steel pipe ring welding mechanism are equipped with welding guns, cone head buffer holders and steel pipe fixed rotators. The robot arm places the cone head assembly on the cone head buffer holder, and the steel pipe enters the steel pipe fixed rotator through the roller. The cone head buffer holder and steel pipe fixed rotator on the right end move along the length of the support base until there is a 1~3mm gap between the end of the steel pipe and the big end of the cone head. The master control system issues an instruction to start the welding gun, first in the gap. Three-point electric welding is performed on the top surface and two sides of the steel pipe, and then the steel pipe fixed rotator drives the steel pipe and the cone head assembly to roll, completing the circumferential welding of the steel pipe and the cone head.

Furthermore, the bolt extractor uses an electromagnet to absorb the rounded ends of high-strength bolts.

Furthermore, the bolt extractor is provided with a track that moves up and down, which is used to adjust the height of the high-strength bolts so that the rods of the high-strength bolts pass through the round holes of the conical heads of different specifications.

Further, the small head of the cone head is placed on the cone head support holder through a robot arm, and the cone head magnetic holder absorbs the large head of the cone head through an electromagnet.

Furthermore, the steel pipe fixed rotator is provided with a V-shaped groove, and the V-shaped groove is provided with balls along the V-shaped edge.

Further, the cone head buffer holder absorbs the sleeve of the cone head assembly through an electromagnet. After the welding gun completes three-point welding, the electromagnet of the cone head buffer holder is powered off and moves downward. The steel pipe fixed rotator drives the steel pipe and cone head. Component scrolls.

Due to the adoption of the above technical solution, compared with the prior art, the beneficial effects of the present invention include:

The present invention uses a cone head bolt matching mechanism to make high-strength bolts, cone heads, sleeves and pins form a cone head assembly. Before the welding process of the cone head and the steel pipe, the bolt and the cone head are stably connected to ensure the relative state of the bolt and the cone head. After the cone head is welded to the steel pipe, the end of the bolt faces the steel pipe, and the bolt's shank passes through the cone head. The entire operation process is controllable, avoiding the tedious operation of the bolt shank passing through the cone head again during the construction stage;

Before the rods composed of steel pipes, cone heads and high-strength bolts are connected to the bolt balls, the sleeves and pins are detachable, and the removed sleeves and pins can be reused, simplifying construction operations without causing a waste of materials;

First perform three-point electric welding on the top and two sides of the gap between the end of the steel pipe and the cone head, and then rotate the steel pipe and cone head assembly to complete the circumferential welding. The welding process is stable and reliable, and avoids large movements of the welding gun;

The bolt extractor is equipped with an up-and-down track, allowing high-strength bolts to move up and down, and can adapt to different specifications of cone heads and high-strength bolts. During the installation stage of the cone head assembly, the high-strength bolts can always be inserted into the round hole of the small head of the cone head;

The cone-head buffer holder and steel pipe fixed rotator on the left end of the support base are in a fixed state. The cone-head buffer holder and steel pipe fixed rotator on the right end can move along the length of the support base and can adapt to steel pipes of different lengths.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of the present invention;

Figure 2 is a schematic structural diagram of the tapered head bolt to be assembled;

Figure 3 is a schematic structural diagram of the cone head bolt being assembled;

Figure 4 is a schematic structural diagram of the installation sleeve;

Figure 5 is a schematic structural diagram of the assembled tapered head bolts;

Figure 6 is a schematic diagram of the side structure of the sleeve.

Figure 7 is a schematic diagram of the front structure of the sleeve.

Figure 8 is a schematic structural diagram of the pin;

Figure 9 is a schematic structural diagram of the transfer of the cone head assembly to the cone head buffer holder;

Figure 10 is a schematic structural diagram of the roller table;

Figure 11 is a schematic structural diagram of a steel pipe fixed rotator;

Reference signs, 1-robot arm, 2-support base, 3-welding gun, 4-roller, 5-pairing base, 6-sliding track, 7-bolt extractor, 8-high-strength bolt, 9-cone head, 10 - Cone head support holder, 11 - Cone head magnetic holder, 12 - Sleeve, 13 - Pin, 14 - Steel pipe, 15 - Cone head buffer holder, 16 - Steel pipe fixed rotator, 17 - Ball.

Detailed ways

The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other implementations or equivalent substitutions obtained by those skilled in the art without making creative efforts are all within the protection scope of the present invention.

Please refer to Figures 1-11. The present invention provides a circumferential welding device for grid rods and end fittings, which includes a cone-head bolt matching mechanism and a steel pipe circumferential welding mechanism. The cone-head bolt pairing mechanism includes a matching base 5 and a sliding track 6 , the bolt extractor 7, the cone head support holder 10 and the cone head magnetic holder 11, the sliding track 6, the cone head support holder 10 and the cone head magnetic holder 11 are all installed on the matching base 5, the bolt extractor 7 moves along the sliding track 6 through the zigzag track. Under the instruction of the general control system, the bolt absorber 7 absorbs the round head of the high-strength bolt 8 through the electromagnet. The high-strength bolt 8 is placed in the material frame. The bolt absorber 7 is set There is a track that moves up and down, so that the high-strength bolt 8 can move up and down to adapt to different specifications of the cone head 9 and the high-strength bolt 8, and always keep the high-strength bolt 8 able to be inserted into the round hole of the small head of the cone head 9;

The cone head 9 is placed on the cone head support holder 10 and the cone head magnetic holder 11 through the robot arm 1. The small head of the cone head 9 is placed on the cone head support holder 10. In order to prevent the cone head 9 from falling down, The cone head magnetic holder 11 uses an electromagnet to fix the cone head 9, and when energized, it stabilizes the cone head 9 through adsorption;

The bolt extractor 7 absorbs the high-strength bolt 8 grabbed by the robot arm 1, moves along the sliding track 6, and pushes the high-strength bolt 8 into and through the round hole of the small head of the cone head 9. The robot arm 1 grabs the sleeve 12 and ensures that The circular screw hole on the side of the sleeve 12 is aligned with the rectangular groove of the high-strength bolt 8. Another robot arm 1 grabs the pin 13 and rotates the pin 13 into the circular hole of the sleeve 12 to achieve the high-strength bolt 8 and the cone head. 9, high-strength bolt 8, cone head 9, sleeve 12 and pin 13 form the cone head assembly;

When the cone head magnetic holder 11 is powered off, the adsorption of the cone head 9 is released, the cone head 9 can be transferred, and the cone head assembly can be transferred to the steel pipe ring welding mechanism through the robot arm 1;

The steel pipe ring welding mechanism is provided with a cone head buffer holder 15 and a steel pipe fixed rotator 16 at both ends of the support base 2. The cone head buffer holder 15 at the left end is fixed with the steel pipe fixed rotator 16, and the cone head buffer holder 15 at the right end is fixed. The steel pipe fixed rotator 15 and the steel pipe fixed rotator 16 can move along the length direction of the support base 2 to adapt to steel pipes 14 of different lengths. The steel pipe fixed rotator 16 is provided with a V-shaped groove, and the V-shaped groove is provided with balls 17 along the V-shaped edge;

The robot arm 1 places the cone head assembly on the cone head buffer holder 15. At the same time, the steel pipe 14 enters the steel pipe fixed rotator 16 through the roller 4. The cone head buffer holder 15 and the steel pipe fixed rotator 16 at the right end are on the support base. 2 moves up to bring the cone head components at both ends close to the steel pipe 14 until there is a 1~3mm gap between the big end of the cone head 9 and the end of the steel pipe 14. The robot arm 1 drives the welding gun 3 to align it with the gap between the cone head 9 and the steel pipe 14. gap, the master control system issues an instruction to start the welding gun 3 to perform three-point electric welding on the top surface and two sides. Then the steel pipe fixed rotator 16 drives the steel pipe 14 and the cone head assembly to roll through the rotation of the ball 17, thus realizing the connection between the steel pipe 14 and the cone head. 9's circumferential welding, the number of circumferential welding rings is determined according to the diameter, wall thickness, welding process parameters, etc. of the steel pipe 14.

The material of the cone head 9 is 45# steel. The robot arm 1 that absorbs the cone head 9 is equipped with a visual recognition system. The visual recognition features are the diameters of the big and small heads of the cone head 9 and the diameter of the circular hole in the middle of the small head. The robot arm 1 grabs the big end of the cone head 9 and places it on the cone head support holder 10 and the cone head magnetic holder 11. The cone head magnetic holder 11 absorbs the cone head 9, and the robot arm 1 releases the hold on the cone head 9. After the adsorption and installation of the cone head assembly is completed, the robot arm 1 grabs the big end of the cone head 9 again and transfers it to the cone head buffer holder 15. The cone head buffer holder 15 absorbs the sleeve 12 of the cone head assembly, and the robot arm 1 is released. Adsorption of cone head 9.

The end of the high-strength bolt 8 has a round head shape, and a rectangular groove is engraved near the round head. The rectangular groove is provided with rounded corners. The rectangular groove function is used to fix the pin 13. The outside of the sleeve 12 is hexagonal and the inside is It is a round hole, used to cover the stem of the high-strength bolt 8. The sleeve 12 is provided with a circular screw hole through the thickness on the side. The hole diameter and thread correspond to the thread on the pin 13, forming a front and back thread, which matches firmly.

During construction, before the rod composed of the steel pipe 14, the cone head 9 and the high-strength bolt 8 is connected to the bolt ball, the disassembled sleeve 12 and pin 13 can be reused.

The operation process of the present invention is: a) Placement of the cone head: the robot arm 1 grabs the big head of the cone head 9 and places it on the cone head support fixture 10 and the cone head magnetic fixation fixture 11. The cone head magnetic fixation fixture 11 Adsorb the cone head 9, and the robot arm 1 releases the adsorption of the cone head 9; b) Installation of the cone head assembly: the bolt extractor 7 pushes the high-strength bolt 8 into and through the round hole of the small head of the cone head 9, and the robot arm 1 grasps the cone head 9. Take the sleeve 12 and cover the stem of the high-strength bolt 8. Another robot arm 1 grabs the pin 13 and rotates it into the circular screw hole of the sleeve 12; c) Transfer and fixation of the cone head assembly: Robot arm 1 again Grab the big end of the cone head 9 and transfer it to the cone head buffer holder 15. The cone head buffer holder 15 absorbs the sleeve 12 of the cone head assembly. The robot arm 1 releases the adsorption of the cone head 9; d) Steel pipe, cone head Distance adjustment: The right end of the cone head buffer holder 15 and the steel pipe fixed rotator 16 move on the support base 2, so that the cone head components at both ends are close to the steel pipe 14, and there is a gap of 1 between the big end of the cone head 9 and the end of the steel pipe 14. ~3mm gap; e) Welding: first three-point electric welding, then rotate the steel pipe 14 and the cone head assembly to complete the circumferential welding.

The preferred embodiments of the invention disclosed above are only intended to help illustrate the invention. The preferred embodiments do not describe all details, nor do they limit the invention to specific implementations. Obviously, many modifications and variations are possible in light of the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can better understand and utilize the present invention. The invention is limited only by the claims and their full scope and equivalents.

Claims (6)

1. A circumferential welding device for grid rods and end fittings, which is characterized in that it includes a robot arm (1), a cone-head bolt matching mechanism and a steel pipe circumferential welding mechanism, The cone head bolt matching mechanism includes a matching base (5), a sliding track (6), a bolt extractor (7), a cone head support holder (10) and a cone head magnetic holder (11). The cone head support holder (11) 10) and the magnetic cone head holder (11) are used to place the cone head (9), and the bolt extractor (7) is used to absorb the round head of the high-strength bolt (8), which is equipped with a rectangular groove. ; The bolt extractor (7) moves along the sliding track (6), pushing the rod of the high-strength bolt (8) into the round hole passing through the small head of the cone head (9), and a robot arm (1) grabs the sleeve (12) ), so that the sleeve (12) covers the rod of the high-strength bolt (8), the through-screw hole of the sleeve (12) is aligned with the rectangular groove of the high-strength bolt (8), and the other robot arm (1) grabs the pin (13), rotate the pin (13) into the through-screw hole of the sleeve (12), which is used to connect the sleeve (12) and the high-strength bolt (8). The high-strength bolt (8), cone head (9), and sleeve The barrel (12) and the pin (13) form the cone head assembly; Both ends of the steel pipe ring welding mechanism are equipped with a welding gun (3), a cone head buffer holder (15) and a steel pipe fixed rotator (16). The robot arm (1) places the cone head assembly on the cone head buffer holder (15). ), the steel pipe (14) enters the steel pipe fixed rotator (16) through the roller (4), and the cone head buffer holder (15) at the right end and the steel pipe fixed rotator (16) are along the length direction of the support base (2) Move until there is a 1~3mm gap between the end of the steel pipe (14) and the big end of the cone head (9). The master control system issues an instruction to start the welding gun (3), first on the top and two sides of the gap. Three-point electric welding, and then the steel pipe fixed rotator (16) drives the steel pipe (14) and the cone head assembly to roll, completing the circumferential welding of the steel pipe (14) and the cone head (9). 2. The circumferential welding device of grid rods and end fittings according to claim 1, characterized in that the bolt absorber (7) absorbs the end round heads of high-strength bolts (8) through electromagnets. 3. The circumferential welding device of grid rods and end fittings as claimed in claim 1, characterized in that the bolt absorber (7) is provided with an up-and-down track for adjusting the high-strength bolts (8). height, so that the rod part of the high-strength bolt (8) passes through the round hole of the small head of the cone head (9) of different specifications. 4. The circumferential welding device of grid rods and end fittings according to claim 1, characterized in that: the cone head (9) places the small head on the cone head support fixture ( 10), the cone head magnetic holder (11) absorbs the big end of the cone head (9) through an electromagnet. 5. The circumferential welding device of grid rods and end fittings according to claim 1, characterized in that: the steel pipe fixed rotator (16) is provided with a V-shaped groove, and the V-shaped groove is along the V-shaped edge. Provided with ball bearings (17). 6. The circumferential welding device of grid rods and end fittings according to claim 1, characterized in that: the cone head buffer holder (15) absorbs the sleeve (12) of the cone head assembly through an electromagnet, and the welding gun ( 3) After completing the three-point electric welding, the electromagnet of the cone head buffer holder (15) is powered off and moves downward, and the steel pipe fixed rotator (16) drives the steel pipe (14) and the cone head assembly to roll.