CN216990308U - Automatic welding production line for end ribs of steel bar truss - Google Patents

Abstract

The utility model provides an automatic welding production line for end reinforcements of a steel bar truss, relates to the technical field of truss support seat welding, and particularly relates to an automatic welding production line for end reinforcements of the steel bar truss. It includes end muscle conveyor, end muscle conveyor's material loading end is provided with violently erects muscle welding set, violently erect muscle welding set's both sides and be provided with horizontal muscle sieve separator and perpendicular muscle sieve separator respectively, horizontal muscle sieve separator and perpendicular muscle sieve separator all are connected through material feeding unit and violently erects muscle welding set, end muscle conveyor's discharge end is provided with truss welding set, truss welding set includes that truss fixed station and end muscle press from both sides tight feed mechanism, end muscle conveyor's discharge end sets up and presss from both sides between tight feed mechanism in truss fixed station and end muscle, truss fixed station top is provided with end muscle welding set. The problems that in the prior art, in the welding process of the steel bar bevel truss and the end ribs, the carbon dioxide arc welding is adopted, so that the economic cost is high, and automation is difficult to realize are solved.

Description

Automatic welding production line for end ribs of steel bar truss

Technical Field

The utility model relates to the technical field of truss support seat welding, in particular to an automatic welding production line for end reinforcements of a steel bar truss.

Background

The metal welding is divided into three categories of fusion welding, pressure welding and brazing according to the characteristics of the technological process, wherein carbon dioxide arc welding belongs to one of fusion welding and is a common welding technical means in the welding process, carbon dioxide arc welding adopts carbon dioxide to isolate the atmosphere so as to protect the electric arc and the molten pool rate during welding, and the metal welding has the characteristics of high production efficiency, good electric arc visibility, convenience for observation and the like; resistance welding belongs to one of pressure welding, is a welding method for realizing connection by melting a contact surface between two workpieces by resistance heat generated when current passes through the workpieces under the action of certain electrode pressure, and has the characteristics of heat concentration, small welding deformation, easy realization of mechanization and automation and the like.

The end of the steel bar angle folding truss needs to be welded with an end rib to improve the strength of the truss, in the prior art, the welding mode of the end rib adopts manual carbon dioxide shielded welding or welding rod welding, so that the efficiency is low, waste gas generated in the welding process is large, the environment is not protected, the consumption of the welding rod and the welding wire is high, and the economic cost is high; in addition, the carbon dioxide arc welding is difficult to realize automation, can be finished by professional welders and is not suitable for an industrial system with high automation degree.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model provides an automatic welding production line for end ribs of a steel bar truss, and aims to solve the problems that in the prior art, carbon dioxide arc welding is adopted in the welding process of a steel bar bevel truss and the end ribs, the economic cost is high, and automation is difficult to realize.

In order to achieve the purpose of the utility model, the technical scheme adopted by the utility model is as follows:

the utility model provides a steel bar truss end muscle automatic weld production line, it includes end muscle conveyor, end muscle conveyor's material loading end is provided with violently erects muscle welding set, it is provided with horizontal muscle sieve separator and perpendicular muscle sieve separator respectively to violently erect muscle welding set's both sides, horizontal muscle sieve separator and perpendicular muscle sieve separator all are connected with violently erecting muscle welding set through material feeding unit, end muscle conveyor's discharge end is provided with truss welding set, truss welding set includes that truss fixed station and end muscle press from both sides tight feed mechanism, end muscle conveyor's discharge end sets up and presss from both sides between the tight feed mechanism of truss fixed station and end muscle, truss fixed station top is provided with end muscle welding set.

Further, the end rib welding device comprises a positive electrode head and a negative electrode head, the positive electrode head is installed on the installation frame through the pressing mechanism, the negative electrode head is installed at one end, close to the truss fixing table, of the end rib clamping and feeding mechanism, the distribution box is installed on the installation frame, and the positive electrode head and the negative electrode head are both electrically connected with the distribution box. The truss is compressed and fixed through the compressing mechanism, when the end rib clamping and feeding mechanism conveys the end rib to the truss and is tightly attached to the truss, positive electricity and negative electricity are respectively introduced into the positive electrode head and the negative electrode head to perform resistance welding, the welding device and the compressing device are combined into a whole, the structure is compact, and the space is saved.

Further, the positive electrode head and the negative electrode head are electrically connected with the distribution box through the flexible copper strips. The flexible copper strip is adopted to be connected with the flexible lead in the heavy current equipment, so that the flexible copper strip has the advantages of safety, reliability, no vibration and noise, and auxiliary heat dissipation.

Furthermore, the end rib conveying device comprises a first conveying mechanism and a second conveying mechanism, an end rib overturning device is arranged between the first conveying mechanism and the second conveying mechanism, the transverse rib welding device and the vertical rib welding device are arranged on one side of the feeding end of the first conveying mechanism, and the truss fixing table and the end rib clamping and feeding mechanism are respectively arranged on two sides of the discharging end of the second conveying mechanism. Transporting the frame welding set department with the end muscle through first conveying mechanism and second conveying mechanism and welding, transporting the period at the end muscle and overturning the end muscle through end muscle turning device for the horizontal muscle of end muscle is under, when end muscle welding set compressed tightly the welding, and horizontal muscle has improved the stability when the welding of end muscle down.

Furthermore, the first conveying mechanism comprises a transmission mechanism, end rib placing frames are uniformly distributed on the transmission mechanism, the transmission mechanism is provided with two conveying chains which are arranged side by side, and a gap through which vertical ribs on the end ribs can pass is formed between the two conveying chains. The end ribs are supported by the end rib placing frame, so that the subsequent end rib overturning device is more convenient to grab, and the detection of the first photoelectric sensing device is also facilitated; leave the space between two transfer chains, can supply the perpendicular muscle on the end muscle to pass through for the position of end muscle on first conveying mechanism 11 is lower, and the in-process of end muscle at the transport is more stable.

Further, a first photoelectric sensing device is installed at the blanking end of the first conveying mechanism. When the first photoelectric sensing device senses the end ribs, the first conveying mechanism stops conveying, and the situation that the end ribs are rolled into the first conveying mechanism through continuous conveying on the first conveying mechanism to cause chain jamming or damage of the first conveying mechanism is avoided.

Further, the first photoelectric sensing devices comprise mounting seats and diffuse reflection type photoelectric sensors, the diffuse reflection type photoelectric sensors are mounted on the rack of the first conveying mechanism through the mounting seats, and the first photoelectric sensing devices are arranged in pairs and symmetrically arranged along the first conveying mechanism. The distance between the end part of the transverse rib of the end rib and the sensor is detected through the diffuse reflection type photoelectric sensor, the length of the transverse rib of the end rib is calculated through the difference value of the distance between the sensors at the two ends and the detected distance, and when the length of the transverse rib of the end rib is inconsistent with a set value, the end rib overturning device cannot grab the end rib, so that the purpose of accurate feeding is achieved.

Further, material feeding unit is including setting up in the straight line module of violently erecting muscle welding set top, installs the crane on the straight line module, installs the electro-magnet on the crane. After horizontal muscle sieve separator or perpendicular muscle sieve separator screened out horizontal muscle or perpendicular muscle, control the electro-magnet through the crane and descend to adsorb horizontal muscle or perpendicular muscle, transport horizontal muscle or perpendicular muscle welding set through sharp module again.

Furthermore, a cable drag chain is installed at one end of the linear module. The cable and the air pipe required by the feeding mechanism are arranged in the cable drag chain, so that the grabbing mechanism can reciprocate freely in the feeding process of the feeding mechanism, and the cable and the air circuit are protected.

Furthermore, a second photoelectric sensing device is installed on the truss fixing table. Whether the truss enters the truss fixing table or not is sensed by the second photoelectric sensing device, the size of the truss is detected, and the situation that the truss and the end ribs are different in size after welding is avoided.

The beneficial effects of the utility model are as follows:

screwing out matched transverse ribs and vertical ribs by a transverse rib screening machine and a vertical rib screening machine, and then feeding the transverse ribs and the vertical ribs into a transverse rib welding device and a vertical rib welding device by a feeding device; after the end ribs are welded, the end ribs are conveyed to the position of the truss welding device through the end rib conveying device, and then the end ribs are grabbed through the end rib clamping and feeding mechanism and conveyed to the truss fixing platform to be positioned on the truss for welding. The whole process greatly reduces the manual participation and realizes the automatic production of the welding of the truss end ribs; resistance welding is carried out through the end rib welding device, carbon dioxide protection welding with high economic cost is eliminated, meanwhile, waste gas is avoided, and the effect of protecting the environment is achieved.

Drawings

Fig. 1 is a top view of an automatic welding production line for end bars of a steel bar truss.

Fig. 2 is a structural diagram of a transverse bar screening machine.

Fig. 3 is a structural view of the feeding device.

Fig. 4 is a structural diagram of a transverse and vertical rib welding device.

Fig. 5 is an enlarged view of a portion a in fig. 4.

Fig. 6 is a configuration diagram of the first conveyance mechanism.

Fig. 7 is an enlarged view of fig. 6 at B.

Fig. 8 is a structural view of the first photoelectric sensing device.

Fig. 9 is a structural view of the tip tendon inverting apparatus.

Fig. 10 is a side view of the tip tendon inverting apparatus.

Fig. 11 is a structural view of a welding part of the truss.

Fig. 12 is a structural view of an end bead welding apparatus.

Fig. 13 is a side view of the end bead welding apparatus.

Wherein, 1, end tendon is conveyed and loaded; 11. a first conveying mechanism; 111. a transmission mechanism; 112. placing a rack for the end ribs; 113. a vertical plate; 114. a horizontal plate; 12. a second conveying mechanism; 13. an end rib turning device; 2. a transverse and vertical rib welding device; 21. a working disc; 22. a cam divider; 23. a transverse rib positioning groove; 24. A vertical rib positioning groove; 25. resistance welding joint; 26. a first station; 27. a second station; 28. a third station; 29. A fourth station; 3. a transverse bar screening machine; 31. a material twisting mechanism; 32. a hopper; 33. a conveyor chain; 4. a vertical bar screening machine; 5. a feeding device; 51. a linear module; 52. a lifting frame; 53. an electromagnet; 54. a cable drag chain; 6. a truss welding device; 61. a truss fixing table; 62. the end reinforcement clamps the feed mechanism; 621. a clamp arm; 622. a drive device; 623. a support frame; 624. a telescopic cylinder; 7. an end reinforcement welding device; 71. A positive electrode tip; 72. a negative electrode; 73. a hold-down mechanism; 74. a distribution box; 75. soft connection of copper strips; 8. a mounting frame; 9. a first photoelectric sensing device; 91. a mounting base; 92. a diffuse reflection type photoelectric sensor 10 and a second photoelectric sensing device.

Detailed Description

The embodiment of the utility model provides an automatic welding production line for end ribs of a steel bar truss, and solves the problems that in the prior art, carbon dioxide arc welding is adopted in the welding process of a steel bar bevel truss and the end ribs, the economic cost is high, and automation is difficult to realize.

In order to better understand the technical scheme, the technical scheme is described in detail in the following with reference to the attached drawings of the specification and specific embodiments.

This steel bar truss end muscle automatic weld production line includes end muscle conveyor 1, the material loading end of end muscle conveyor 1 is provided with violently erects muscle welding set 2, the both sides of violently erecting muscle welding set 2 are provided with horizontal muscle sieve separator 3 and erect muscle sieve separator 4 respectively, horizontal muscle sieve separator 3 and erect muscle sieve separator 4 all are connected with violently erecting muscle welding set 2 through material feeding unit 5, the discharge end of end muscle conveyor 1 is provided with truss welding set 6, truss welding set 6 includes that truss fixed station 61 and end muscle press from both sides tight feed mechanism 62, the discharge end of end muscle conveyor 1 sets up in truss fixed station 61 and the tight feed mechanism 62 of end muscle clamp, truss fixed station 61 top is provided with end muscle welding set 7.

The transverse rib screening machine 3 and the vertical rib screening machine 4 are consistent in structure and are correspondingly installed at the positions of a first station 26 and a second station 27 of the transverse and vertical rib welding device 2 respectively for screening out proper transverse ribs and vertical ribs. The transverse rib screening machine 3 comprises a material twisting mechanism 31, a hopper 32 is installed on one side of the material twisting mechanism 31, the bottom of the hopper 32 inclines towards the material twisting mechanism 31, and a conveying chain 33 is installed at one end, far away from the hopper 32, of the material twisting mechanism 31. After the transverse ribs are put into the hopper 32, the transverse ribs are collected to the material rubbing mechanism 31, the material rubbing mechanism 31 screens out the transverse ribs with proper length and sends the transverse ribs to the conveying chain 33, and the transverse ribs are sent to the feeding end of the feeding device 5 through the conveying chain 33.

The feeding device 5 comprises a linear module 51 arranged above the horizontal and vertical rib welding device 2, a lifting frame 52 is installed on the linear module 51, and an electromagnet 53 is installed on the lifting frame 52. After horizontal muscle sieve separator 3 or perpendicular muscle sieve separator 4 screened out horizontal muscle or perpendicular muscle, control electro-magnet 53 through crane 52 and descend and adsorb horizontal muscle or perpendicular muscle, drive crane 52 through sharp module 51 again and transport horizontal muscle or perpendicular muscle to violently erect muscle welding set 2. A cable drag chain 54 is mounted at one end of the linear module 51. The cables and air pipes required by the feeding mechanism 5 are arranged in the cable drag chain 54, so that the linear module 51 can reciprocate back and forth more freely in the feeding process of the feeding mechanism 5, and the cable and air circuit protection function is achieved.

The transverse and vertical rib welding device 2 comprises a rotary welding mechanism, the rotary welding mechanism is used for installing a working disc 21 on a cam divider 22, the cam divider 22 drives the working disc 22 to rotate, four stations are accurately positioned in the circumferential direction, a transverse rib sent by a feeding device 5 is received and positioned at a station I26 through a transverse rib positioning groove 23, the cam divider 22 rotates to position a vertical rib sent by another feeding device 5 through a vertical rib positioning groove 24 at a station II 27, the transverse rib and the vertical rib are overlapped into a T shape at the moment, then the transverse rib and the vertical rib rotate to a station III 28 through the cam divider 22, a resistance welding head 25 above the station III 28 descends to weld the overlapping part of the transverse rib and the vertical rib to form an end rib, the cam divider 22 rotates to a station IV 29 again, then the end rib is clamped through an electromagnet chuck, the electromagnet chuck is installed on a straight line module through a vertical telescopic cylinder, when the electromagnet chuck clamps the end ribs, the end ribs are conveyed to the upper part of the first conveying mechanism 11 through the linear module, and then the end ribs are placed on the end rib placing frame 112 of the first conveying mechanism 11 through the vertical telescopic cylinder.

The end rib conveying device 1 comprises a first conveying mechanism 11 and a second conveying mechanism 12, an end rib overturning device 13 is arranged between the first conveying mechanism 11 and the second conveying mechanism 12, the transverse rib welding device 2 is arranged on one side of the feeding end of the first conveying mechanism 11, and the truss fixing table 61 and the end rib clamping and feeding mechanism 62 are respectively arranged on two sides of the discharging end of the second conveying mechanism 12.

The first conveying mechanism 11 includes a transmission mechanism 111, the transmission mechanism 111 may be a chain transmission mechanism or a belt transmission mechanism, and end rib placing frames 112 are uniformly distributed on a transmission chain or a synchronous belt of the transmission mechanism. Drive mechanism 111 includes the drive wheel and cup joints conveying chain or the hold-in range on the drive wheel, preferably, set up conveying chain or hold-in range into two side by side, make on the both ends of the horizontal muscle of end muscle can be fixed in end muscle rack 112 on two conveying chains or hold-in ranges respectively, the space between two conveying chains or the hold-in range can supply the perpendicular muscle on the end muscle to pass through, make the position of end muscle on first conveying mechanism 11 lower, the in-process of end muscle at the transport is more stable.

The end bar placing frame 112 comprises two vertical plates 113 and a horizontal plate 114, the horizontal plate 114 is arranged on the chain, the horizontal plate 114 and the two rows of chains are perpendicular to each other, and the two vertical plates 113 are respectively and vertically arranged at two ends of the horizontal plate 114; the middle position of the top of the vertical plate 113 is provided with an arc groove, the middle part of the horizontal plate 114 close to one side of the second conveying mechanism 12 is also provided with an arc groove, and when the end ribs are placed on the end rib placing frame 112, the arc groove can play a role in positioning the end ribs.

First photoelectric sensing device 9 is installed to the discharge end of first conveying mechanism 11, and first photoelectric sensing device 9 is used for detecting whether have the end muscle on the end muscle rack 112 to and whether the end muscle on the detection end muscle rack 112 is qualified. The first photoelectric sensing devices 9 include a mounting seat 91 and a diffuse reflection type photoelectric sensor 92, the diffuse reflection type photoelectric sensor 92 is mounted on the rack of the first conveying mechanism 11 through the mounting seat 91, and the first photoelectric sensing devices 9 are arranged in pairs and symmetrically arranged along the first conveying mechanism 11. The distance between the end part of the transverse rib of the end rib and the sensor is detected through the diffuse reflection type photoelectric sensor 92, the length of the transverse rib of the end rib is calculated through the difference value of the distance between the sensors at the two ends and the detected distance, and when the length of the transverse rib of the end rib is inconsistent with a set value, the end rib cannot be grabbed by the end rib overturning device 13, so that the purpose of accurate feeding is achieved.

Be provided with end muscle turning device 13 at first conveying mechanism 11's discharge end, overturn 180 to the end muscle through end muscle turning device 13, end muscle turning device 13 specifically includes a horizontal telescopic cylinder, and the chuck is installed to the output of horizontal telescopic cylinder, and horizontal telescopic cylinder installs in revolving cylinder's output, and revolving cylinder passes through the crane and installs on mounting bracket 8, and end muscle turning device 13 sets up in same one side of second conveying mechanism 12 with end muscle clamp feed mechanism 62.

Second conveying mechanism 12 is used for carrying the end muscle to truss welding set 6 department, waits for the end muscle to press from both sides tight feed mechanism 62 clamp and get the end muscle, and second conveying mechanism 12 includes end muscle fixing base and sharp module, and end muscle fixing base is installed on sharp module through a vertical telescopic cylinder, and the tow chain is installed to sharp module top for protection circuit and gas circuit. An elastic clip is arranged on the end rib fixing seat, a clamping groove capable of wrapping three-quarters arc surface of the vertical rib is formed in one end, close to the second conveying mechanism 12, of the elastic clip, and the length direction of the clamping groove is vertical; when end muscle turning device 13 overturns the end muscle to directly over the end muscle fixing base, the vertical telescopic cylinder of control rises and will erects the muscle card in the draw-in groove, send the end muscle to the end muscle through sharp module again and press from both sides tight feed mechanism 62 department of feed, at the in-process that the end muscle presss from both sides tight feed mechanism 62 of clamp, the operation that the end muscle presss from both sides tight feed mechanism 62 can not be influenced to the spring clip. The first conveying mechanism 11 and the second conveying mechanism 12 are perpendicular to each other, and in order to reduce the space occupied by the production line, the transverse and vertical rib welding device 2, the truss fixing table 61 and the end rib clamping and feeding mechanism 62 are all arranged on the same side of the first conveying mechanism 11.

The truss fixing table 61 is arranged on one side of the discharge end of the second conveying mechanism 12 and used for fixing a truss and providing a welding station, and the second photoelectric sensing device 10 is installed on the truss fixing table 61. In this embodiment, the second photoelectric sensing devices 10 are identical to the first photoelectric sensing devices 9 in structure, and the second photoelectric sensing devices 10 are symmetrically mounted on the mounting frames 8 on both sides of the truss fixing table 61 in pairs. Whether there is the truss to get into truss fixed station 61 through the response of second photoelectric sensing device 10, detects out the size of truss simultaneously, avoids appearing the unmatched condition of welding back truss and end muscle size.

The end bar clamping and feeding mechanism 62 is arranged on one side of the discharge end of the second conveying mechanism 12, which is far away from the truss fixing table 61. The end tendon clamping and feeding mechanism 62 comprises a clamping arm 621, a driving device 622 is mounted at one end, far away from the welding head, of the clamping arm 621, the clamping arm 621 is mounted on a guide rail through a support frame 623, and a telescopic cylinder 624 is mounted at one end, far away from the welding head, of the support frame 623. When the second conveying mechanism 12 conveys the end rib to the truss welding device 6, the driving device drives the clamping arm 621 to clamp the end rib, and then the telescopic cylinder 624 conveys the end rib to the truss fixing table 61, so that the end rib is tightly attached to the truss.

End muscle welding set 7 with be fixed in the top of truss fixed station 61 through mounting bracket 8 for the welding of truss and end muscle, end muscle welding set 7 specifically includes positive electrode head 71 and negative electrode head 72, positive electrode head 71 passes through hold-down mechanism 73 and installs on mounting bracket 8, negative electrode head 72 is installed and is pressed from both sides the one end of sending mechanism 62 to be close to truss fixed station 61 in the end muscle, install block terminal 74 on mounting bracket 8, positive electrode head 71 and negative electrode head 72 all with block terminal 74 electric connection.

The positive electrode head 71 comprises an upper electrode head and a lower electrode head, the pressing mechanism 73 comprises a supporting block, and the supporting block is arranged on the mounting frame 8 through a telescopic cylinder; the telescopic cylinder is vertically arranged on the mounting frame 8, and the supporting block is hinged with an output shaft of the telescopic cylinder; a guide rail is vertically arranged on one side of the telescopic cylinder, the guide rail and the telescopic cylinder are arranged in parallel, and a supporting block is arranged on a sliding block of the guide rail; a pressing block is arranged at one end of the bottom surface of the supporting block, which is far away from the end rib clamping and feeding mechanism 62, and a bevel clamping groove is arranged at the lower end of the pressing block; the upper electrode head is arranged at one end, close to the end rib, of the bottom surface of the supporting block, which clamps the feeding mechanism 62, an insulating plate is further arranged between the upper electrode head and the pressing block, the lower electrode head is provided with two long copper rods, the lower electrode head is arranged on the mounting frame 8 through two telescopic cylinders, the insulating plate is further arranged between the output end of each telescopic cylinder and the lower electrode head, and the telescopic cylinders and the lower electrode heads are both vertically arranged; still be provided with the guide block on the mounting bracket 8, be provided with on the guide block with lower electrode tip assorted guiding hole, lower electrode tip passes the guiding hole, is provided with insulating washer between lower electrode tip and the guiding hole, the guide block is installed on mounting bracket 8 through a vertical connecting plate. And a conductive block is arranged under the positive electrode head 71, the conductive block can play a role in conducting and supporting during welding, and the auxiliary pressing mechanism 73 fixes the truss.

The positive electrode head 71 and the negative electrode head 72 are electrically connected to a distribution box 74 through a flexible copper strip 75. The flexible copper strip 75 is connected with a flexible lead in high-current equipment, so that the flexible copper strip is safe and reliable, does not generate vibration and noise, and plays a role in auxiliary heat dissipation.

The working process of the utility model is as follows:

selecting proper transverse bars by a material twisting mechanism 31 in the transverse bar screening machine 3, conveying the transverse bars to the feeding end of a feeding device 5 through a conveying chain 33, driving an electromagnet 53 to descend through a lifting frame 52 to adsorb the transverse bars, conveying the transverse bars to a first station 26 of the transverse and vertical bar welding device 2 through a linear module 51, and placing the transverse bars in a transverse bar positioning groove 23; rotating the working disc 21 through the cam divider 22, screening proper vertical ribs by the vertical rib screening machine 4, then conveying the vertical ribs to a second station 27 of the transverse and vertical rib welding device 2 by the feeding device 5 at the vertical rib screening machine 4, placing the vertical ribs in the vertical rib positioning grooves 24, and overlapping the vertical ribs with the transverse ribs to form a T-shaped structure; the cam divider 22 rotates the working disc 21 to the third station 28 again, the resistance welding head 25 above the third station 28 descends to weld the lap joint of the transverse rib and the vertical rib to form an end rib, and the cam divider 22 rotates to the fourth station 29 again; the end ribs are clamped by the electromagnet clamping heads and then placed on the end rib placing frame 112 of the first conveying mechanism 11 through the vertical telescopic cylinder.

Conveying the end ribs to an end rib turning device 13 through a first conveying mechanism 11, and detecting whether the end ribs are qualified or not through a first photoelectric sensing device 9; when the end ribs meet the set values, the end rib overturning device 13 completes overturning to enable the transverse ribs of the end ribs to be under, and stability of the end ribs during welding is improved. The vertical telescopic cylinder in the second conveying mechanism 13 extends out, the vertical ribs of the end ribs are clamped in clamping grooves in the elastic clamps, and the end ribs are conveyed to the end rib clamping and feeding mechanism 62 through a linear module in the second conveying mechanism 13. The end bar clamping and feeding mechanism 62 clamps the end bar and feeds the end bar to the truss fixing table 10, and a worker places the truss on the truss fixing table 61 and contacts with the end bar; after the second photoelectric sensing device 10 detects whether the truss is qualified or not and the truss accords with a set value, the pressing mechanism 73 descends to press and fix the truss, positive electricity and negative electricity are respectively introduced into the positive electrode head 71 and the negative electrode head 72 through the distribution box 74 to be welded, after welding of end ribs is completed, the pressing mechanism 73 is lifted and the end ribs are withdrawn from the end rib clamping and feeding mechanism 62, and the welded truss is taken out by workers.

It should be apparent to those skilled in the art that while the preferred embodiments of the present invention have been described, additional variations and modifications in these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the utility model. It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the machine equivalent technology of the claims of the present invention, it is intended that the present invention also include such modifications and variations.

Claims (10)

1. The automatic welding production line for the end ribs of the steel bar truss is characterized by comprising an end rib conveying device (1), wherein a transverse rib welding device (2) is arranged at the feeding end of the end rib conveying device (1), a transverse rib screening machine (3) and a vertical rib screening machine (4) are respectively arranged on two sides of the transverse rib welding device (2), the transverse rib screening machine (3) and the vertical rib screening machine (4) are respectively connected with the transverse rib welding device (2) through corresponding feeding devices (5), a truss welding device (6) is arranged at the discharge end of the end rib conveying device (1), the truss welding device (6) comprises a truss fixing table (61) and an end rib clamping and feeding mechanism (62), the discharge end of the end rib conveying device (1) is arranged between the truss fixing table (61) and the end rib clamping and feeding mechanism (62), an end rib welding device (7) is arranged above the truss fixing table (61).

2. The automatic welding production line for the end ribs of the steel bar truss according to claim 1, wherein the end rib welding device (7) comprises a positive electrode head (71) and a negative electrode head (72), the positive electrode head (71) is installed on the installation frame (8) through a pressing mechanism (73), the negative electrode head (72) is installed at one end, close to the truss fixing table (61), of the end rib clamping and feeding mechanism (62), a distribution box (74) is installed on the installation frame (8), and the positive electrode head (71) and the negative electrode head (72) are both electrically connected with the distribution box (74).

3. The automatic welding production line for the end ribs of the steel bar truss according to claim 2, characterized in that the positive electrode head (71) and the negative electrode head (72) are electrically connected with the distribution box (74) through soft copper connecting strips (75).

4. The automatic welding production line for the end bars of the steel bar truss according to claim 1 is characterized in that the end bar conveying device (1) comprises a first conveying mechanism (11) and a second conveying mechanism (12), an end bar overturning device (13) is arranged between the first conveying mechanism (11) and the second conveying mechanism (12), the transverse and vertical bar welding device (2) is arranged on one side of the feeding end of the first conveying mechanism (11), and the truss fixing table (61) and the end bar clamping and feeding mechanism (62) are respectively arranged on two sides of the discharging end of the second conveying mechanism (12).

5. The automatic welding production line for the end ribs of the steel bar trusses according to claim 4, wherein the first conveying mechanism (11) comprises a transmission mechanism (111), end rib placing frames (112) are uniformly distributed on the transmission mechanism (111), the transmission mechanism (111) is provided with two conveying chains which are arranged side by side, and a gap through which a vertical rib on the end rib can pass is formed between the two conveying chains.

6. The automatic welding production line for the end reinforcement of the steel bar truss according to claim 4, wherein a first photoelectric sensing device (9) is installed at the discharge end of the first conveying mechanism (11).

7. The automatic welding production line for the end reinforcement of the steel bar truss according to claim 6, wherein the first photoelectric sensing device (9) comprises a mounting seat (91) and a diffuse-reflection type photoelectric sensor (92), the diffuse-reflection type photoelectric sensor (92) is mounted on the rack of the first conveying mechanism (11) through the mounting seat (91), and the first photoelectric sensing devices (9) are arranged in pairs and symmetrically arranged along the first conveying mechanism (11).

8. The automatic welding production line for the end ribs of the steel bar truss according to claim 1, wherein the feeding device (5) comprises a linear module (51) arranged above the transverse and vertical rib welding device (2), a lifting frame (52) is installed on the linear module (51), and an electromagnet (53) is installed on the lifting frame (52).

9. An automatic welding production line for end bars of steel bar trusses according to claim 8, wherein a cable drag chain (54) is installed at one end of the linear module (51).

10. The automatic welding production line for the end bars of the steel bar trusses as claimed in claim 1, wherein a second photoelectric sensing device (10) is mounted on the truss fixing table (61).

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