A welding wire constant tension automatic pay-off machine for welding robot and operation method thereof

Abstract

The present invention discloses a welding wire constant tension automatic pay-off machine for a welding robot and an operation method thereof. The welding wire constant tension automatic pay-off machine comprises an I-wheel clamping mechanism, a welding wire lead-out mechanism, an I-wheel for loading welding wire and a ball screw, the I-wheel is rotatably connected to the inside of the I-wheel clamping mechanism, the ball screw is fixedly connected to the top of the I-wheel clamping mechanism, the welding wire lead-out mechanism is laterally movable and connected to the ball screw, a window is provided at the top of the I-wheel clamping mechanism, the welding wire passes through the window and the welding wire lead-out mechanism in sequence, when welding, the welding wire lead-out mechanism moves with the change of the lead-out position of the welding wire on the I-wheel, and the I-wheel drive motor can actively adjust the rotation speed according to the change of the welding wire tension detected by the welding wire tension sensor, so as to make the tension of the welding wire constant. The present invention solves the problem of poor stability and continuity of welding wire conveying in automated welding.

Description

Technical Field

[0001] The present invention relates to the technical field of welding equipment, and in particular to a welding wire constant tension automatic pay-off machine for a welding robot and an operating method thereof. Background Art

[0002] Using automated welding equipment such as welding robots or special welding machines to replace manual welding operations has great advantages in ensuring welding quality, improving welding efficiency, and reducing welding costs. At the same time, it can greatly reduce the damage to welders in some special working environments. As a major equipment manufacturing country, China's automated welding is the current and future development trend.

[0003] At present, there are two forms of welding wire used in automated welding at home and abroad. One is coiled welding wire, that is, a plastic coil (or wire coil) is used as the core shaft. The maximum diameter of the plastic coil is 270-300mm. Each plastic coil can load 20 kg of steel welding wire or 7 kg of aluminum welding wire. The other is barreled welding wire, that is, the welding wire is loaded into a prefabricated paper tube. Each barrel of barreled welding wire can hold 250 kg of steel welding wire and up to 141 kg of aluminum welding wire.

[0004] For example, the utility model patent with the Chinese patent publication number CN207735818U discloses a welding robot, which relates to the technical field of production automation equipment; it includes a base, an X-axis, a Y-axis, a Z-axis, an R-axis, a ball screw mechanism, a servo motor, a reducer, a double-wheel wire feeder, a solenoid valve, a welding gun, an insulating bakelite board, and welding wire; the base is provided with an X-axis, the X-axis is fixed with a Z-axis, the Z-axis is fixed with a Y-axis, the X-axis, the Y-axis and the Z-axis are respectively provided with a ball screw mechanism, and the servo motor is connected to the ball screw mechanism by driving; the Y-axis is provided with an R-axis, and the R-axis is connected to the servo motor through a reducer; the Y-axis end is connected to a double-wheel wire feeder, and a solenoid valve is provided on the servo motor connected to the double-wheel wire feeder, and the welding wire is connected to the double-wheel wire feeder; the R-axis is connected to the welding gun, and an insulating bakelite board is installed on the welding gun. The utility model adopts an anti-collision welding gun and a double-wheel wire feeder, and the fixing method adopts a built-in ground foot method, which is more beautiful and novel in appearance.

[0005] There are at least the following problems in the prior art:

[0006] Whether it is coiled wire or barreled wire, in the welding machine system, it is passive wire feeding. During the welding process, the wire is pressed by the wire feeding wheel in front of the welding gun for feeding. The coiled wire has a small amount of wire and is neatly arranged on the wire reel. Although it is passive wire feeding, there is generally no problem of wire feeding obstruction. However, the barreled wire is easily twisted and knotted when the wire feeding wheel is dragged outward, resulting in poor wire feeding, arc breaking, welding nozzle burning and other problems, which seriously affect the welding quality and cause poor stability and continuity of the welding wire during the wire feeding process.

[0007] With regard to the problems of poor stability and continuity of welding wire during the wire feeding process in the prior art, no effective solution has been proposed so far. Summary of the invention

[0008] The object of the present invention is to provide a welding wire constant tension automatic pay-off machine for a welding robot and an operating method thereof in view of the deficiencies in the prior art.

[0009] The welding wire constant tension automatic pay-off machine comprises: an I-wheel clamping mechanism, a welding wire derivation mechanism, an I-wheel for loading the welding wire and a ball screw, the I-wheel is rotatably connected to the inside of the I-wheel clamping mechanism, the ball screw is fixedly connected to the top of the I-wheel clamping mechanism, the welding wire derivation mechanism is laterally movable and connected to the ball screw, a window is provided on the top of the I-wheel clamping mechanism, the welding wire passes through the window and the welding wire derivation mechanism in sequence, and when welding, the welding wire derivation mechanism moves as the derivation position of the welding wire on the I-wheel changes.

[0010] Furthermore, the welding wire delivery mechanism includes a wire arranging position sensor, a wire pulley, a connecting rod and a screw drive motor for driving the ball screw to rotate. The wire arranging position sensor and the wire pulley are fixedly connected to the connecting rod, and the connecting rod is laterally movable and connected to the ball screw. The wire arranging position sensor is electrically connected to the screw drive motor, and the screw drive motor is fixedly connected to one end of the ball screw. The welding wire passes through the wire arranging position sensor and the wire pulley in sequence. When welding, the screw drive motor drives the ball screw to rotate so that the connecting rod moves on the ball screw.

[0011] Furthermore, the I-shaped wheel clamping mechanism includes a frame and a dust cover, wherein the dust cover is arranged on the outside of the I-shaped wheel and is integrally connected to the frame.

[0012] Furthermore, the I-wheel clamping mechanism also includes two I-wheel tops, which are symmetrically arranged on both sides of the I-wheel, and the two I-wheel tops can rotate with the rotation of the I-wheel.

[0013] Furthermore, the welding wire constant tension automatic pay-off machine also includes a heating unit and a temperature control unit, the heating unit and the temperature control unit are both fixed inside the frame, and the heating unit and the temperature control unit are electrically connected.

[0014] Furthermore, the connecting rod includes a cross rod and a tilting rod, one end of the cross rod is fixedly connected to the ball screw, the other end of the cross rod is hinged to the middle of the tilting rod, and the axis of the tilting rod is parallel to the axis of the welding wire.

[0015] Furthermore, the I-shaped wheel clamping mechanism also includes a top cone, and the top cone is fixedly connected to one of the two I-shaped wheel tops.

[0016] Furthermore, the I-wheel clamping mechanism also includes an I-wheel drive motor and a welding wire tension sensor, the I-wheel drive motor and the welding wire tension sensor are electrically connected, the welding wire tension sensor is fixedly connected to the wire guide wheel, the I-wheel drive motor is fixedly connected to the other I-wheel top of the two I-wheel tops, and when the welding wire tension sensor detects the tension of the welding wire, the I-wheel drive motor drives the I-wheel to rotate so that the welding wire is actively led out.

[0017] Furthermore, the welding wire delivery mechanism includes three wire wheels, which are arranged on the tilting rod in sequence. The welding wire tension sensor is connected to the wire wheel located in the middle. The welding wire passes through the bottom, top and bottom of the three wire wheels in sequence, forming a curved trajectory on the three wire wheels.

[0018] The present invention also discloses an operation method of the welding wire constant tension automatic pay-off machine for a welding robot, comprising the following steps:

[0019] Step 1: Use a layer winding machine to wind the welding wire layer on the I-shaped wheel, and the diameter of the welding wire is 0.8-1.6mm.

[0020] Step 2, fix the spool on the frame through two symmetrically arranged spool tops, and the spool tops can rotate with the rotation of the spool.

[0021] Step 3: Use a top cone to tighten the I-shaped wheel.

[0022] Step 4, lead the welding wire out from the I-shaped wheel, the window, the wire arrangement position sensor, and the wire wheel in sequence.

[0023] Step 5, welding starts, and the wire pressing roller in front of the welding gun drives the welding wire to be fed.

[0024] Step 6, when the welding wire tension sensor detects the tension of the welding wire, the welding wire tension sensor sends a start signal to the I-wheel drive motor through the sending module, and the receiving module of the I-wheel drive motor receives the start signal, and starts the I-wheel drive motor through the control module, which drives the dial, the I-wheel, and the top of the I-wheel to rotate in turn, and actively releases the welding wire loaded on the I-wheel, and the I-wheel drive motor can actively adjust the speed according to the change of the welding wire tension detected by the welding wire tension sensor to keep the tension of the welding wire constant.

[0025] Step 7, when the angle between the wire arrangement position sensor and the welding wire is not between 0-10°, the wire arrangement position sensor sends an open signal to the screw drive motor through the sending module, and the acquisition module of the screw drive motor obtains the open signal, and starts the screw drive motor through the control module to drive the screw to rotate. The screw drives the nut, cross bar, and tilt rod to move horizontally in turn. When the angle between the wire arrangement position sensor and the welding wire is between 0-10°, the screw drive motor stops.

[0026] Compared with the prior art, the welding wire constant tension automatic pay-off machine of the present invention has the following remarkable advantages:

[0027] 1. The present invention adopts an I-shaped wheel to carry wire and actively pays off the wire. The welding wire is wound sequentially on the I-shaped wheel, which not only ensures the smoothness of wire feeding during welding, but also takes into account the large capacity of barreled welding wire. It is the best solution for automatic welding wire feeding guarantee and can be widely used in the welding of steel structures and non-ferrous metal structures, especially in the automatic welding of aluminum alloys. It has more technical advantages.

[0028] 2. The wire capacity of barreled welding wire is 250 kg per barrel for steel welding wire and 141 kg per barrel for aluminum welding wire. Compared with the wire capacity of coiled welding wire, which is 20 kg per coil for steel welding wire and 7 kg per coil for aluminum welding wire, the replacement cost per ton of welding wire is nearly 20 times that of coiled welding wire. The wire capacity of I-spool can reach more than 2 times that of barreled welding wire. Therefore, the present invention further reduces the cost of automatic welding.

[0029] 3. At present, the domestic medium-sized welding wire manufacturing enterprises, such as steel welding wire production, are all above 10,000 tons, and the aluminum welding wire production is above 3,000 tons. Large-scale welding wire production enterprises, such as Tianjin Jinqiao, produce more than 1.4 million tons of various welding wires annually. Under the current increasingly severe environmental pressure, some products use I-shaped wheel packaging instead of welding wire reels or welding wire barrels. This can save a large amount of social resources such as plastic, cardboard and wood of the manufactured welding wire reels or welding wire barrels every year. Moreover, as downstream welding users, these packaging materials have no recycling value and are generally thrown away at will, causing great pollution to the environment. Therefore, the application of the present invention will have good social and environmental effects.

[0030] 4. Using I-shaped wheels as welding wire carriers, and cooperating with welding wire constant tension automatic pay-off machine and automatic welding machine, it can not only ensure continuous and stable wire feeding, but also achieve a larger loading capacity, further reducing welding costs.

[0031] 5. The I-wheel pay-off is adopted, and the welding wire is not twisted during the delivery process, eliminating the wire jamming caused by the twisting of the welding wire during the wire feeding process. At the same time, due to the large loading capacity, and the elimination of the coiling and barreling processes and packaging costs, the production cost is further reduced under the premise of improving the wire feeding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a front cross-sectional schematic diagram of the welding wire constant tension automatic pay-off machine of the present invention;

[0033] Figure 2 It is a left view of the welding wire constant tension automatic pay-off machine described in the present invention.

[0034] Description of reference numerals:

[0035] 1-I-wheel clamping mechanism, 11-frame, 12-dust cover, 13-I-wheel top, 14-I-wheel drive motor, 15-welding wire tension sensor, 16-dial, 17-top cone, 18-bearing, 2-welding wire lead-out mechanism, 21-wire arrangement position sensor, 22-wire wheel, 23-connecting rod, 231-cross rod, 232-tilt rod, 24-screw drive motor, 3-I-wheel, 4-ball screw, 41-nut, 42-screw, 5-window, 6-welding wire, 50-support frame, 100-heating unit, 101-temperature control unit. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0037] like Figure 1 As shown, the welding wire constant tension automatic pay-off machine includes an I-wheel clamping mechanism 1, a welding wire lead-out mechanism 2, an I-wheel 3 for loading the welding wire 6 and a ball screw 4, the I-wheel 3 is rotatably connected to the inside of the I-wheel clamping mechanism 1, and is used to lead out the welding wire 6, the ball screw 4 is fixedly connected to the top of the I-wheel clamping mechanism 1 through a support frame 50, the welding wire lead-out mechanism 2 is laterally movable and connected to the ball screw 4, and is used to correspond to the lead-out position of the welding wire 6, a window 5 is provided on the top of the I-wheel clamping mechanism 1, and is used to lead out the welding wire 6, the welding wire 6 passes through the window 5 and the welding wire lead-out mechanism 2 in sequence, and when welding, the welding wire lead-out mechanism 2 moves with the change of the lead-out position of the welding wire 6 on the I-wheel 3, so as to keep the angle between the welding wire 6 and the welding wire lead-out mechanism 2 always between 0-10°.

[0038] Furthermore, if Figure 1 and Figure 2 As shown, the welding wire derivation mechanism 2 includes a wire arrangement position sensor 21, a wire pulley 22, a connecting rod 23 and a screw drive motor 24 for driving the ball screw 4 to rotate. The wire arrangement position sensor 21 and the wire pulley 22 are fixedly connected to the connecting rod 23. The ball screw 4 includes a nut 41 and a screw 42. The nut 41 is laterally movable and connected to the screw 42. The connecting rod 23 is fixedly connected to the nut 41. The wire arrangement position sensor 21 is electrically connected to the screw drive motor 24 for starting the screw drive motor 24 so that the screw drive motor 24 drives the screw 42 to rotate. The connecting rod 23 fixedly connected to the nut 41 moves laterally under the drive of the nut 41. The screw drive motor 24 is fixedly connected to one end of the screw 42 for driving the screw 42 to rotate. The welding wire 6 passes through the wire arrangement position sensor 21 and the wire pulley 22 in sequence. When welding, the screw drive motor 24 drives the screw 42 to rotate so that the nut 41 drives the connecting rod 23 to move laterally.

[0039] Furthermore, if Figure 1 and Figure 2As shown, the connecting rod 23 includes a cross bar 231 and a tilting rod 232. One end of the cross bar 231 is fixedly connected to the nut 41, so that the cross bar 231 can move with the movement of the nut 41. The other end of the cross bar 231 is hinged to the middle part of the tilting rod 232 to adjust the tilt angle of the tilting rod 232. The welding wire 6 is wound around the I-shaped wheel 3. The lead-out position of the welding wire 6 on the I-shaped wheel 3 changes with the consumption of the welding wire 6. In order to reduce the angle between the welding wire 6 and the wire wheel 22, the axis of the tilting rod 232 is always kept parallel to the axis of the welding wire 6, thereby ensuring the straightness of the welding wire 6 when entering the cable arrangement position sensor 21, which is used to reduce the influence of tension.

[0040] Furthermore, if Figure 1 and Figure 2As shown, the I-shaped wheel clamping mechanism 1 includes a frame 11, a dust cover 12, two I-shaped wheel tops 13, a top cone 17, an I-shaped wheel drive motor 14 and a welding wire tension sensor 15. The frame 11 is used to carry the I-shaped wheel 3, the I-shaped wheel drive motor 14, and a support frame 50. The frame 11 is made of welded steel plates and is through-connected on both sides. The dust cover 12 is made of transparent glass. The dust cover 12 is arranged on the outside of the I-shaped wheel 3 and is integrally connected to the through openings on both sides of the frame 11 to prevent dust from falling on the welding wire 6 and facilitate observation of the running status of the welding wire 6. The two I-shaped wheel tops 13 are symmetrically arranged on the welding wire 6. On both sides of the spool 3, two spool tops 13 are embedded in the grooves on both sides of the spool 3 (not shown in the figure) and fit with both sides of the spool 3 respectively, so as to tighten and lift the spool 3. The two spool tops 13 can rotate with the rotation of the spool 3. The top cone 17 is fixedly connected with the spool top 13 on the left side, so as to axially fix the spool 3. The top cone 17 is fixedly connected with the spool top 13 through the circular hole on the frame 11. When the spool 3 is tightened, the top cone 17 is rotated to push the spool top 13 toward the spool 3, so that the spool 3 is fixed on the frame 11, and the spool drive The motor 14 is electrically connected to the welding wire tension sensor 15, and the welding wire tension sensor 15 is fixedly connected to the wire wheel 22, and is used to send a start signal to the I-wheel drive motor 14 when the tension of the welding wire 6 is detected, so that the I-wheel drive motor 14 drives the I-wheel 3 to rotate. The I-wheel drive motor 14 is fixedly connected to the I-wheel top 13 on the right side through a bearing 18, and a dial 16 is provided on the bearing 18. One end of the dial 16 is fixedly connected to the bearing 18, and the other end of the dial 16 is stuck in a groove on the side of the I-wheel 3 (not shown in the figure), which is used to drive the I-wheel 3 to rotate, and the I-wheel 3 drives the two The top 13 of the I-wheel rotates so that the welding wire 6 is actively led out. The welding wire leading-out mechanism 2 includes three wire wheels 22, and the three wire wheels 22 are sequentially arranged on the tilting rod 232, wherein the welding wire tension sensor 15 is connected to the wire wheel 22 located in the middle. When the welding wire 6 is released, the wire wheel 22 located in the middle is displaced under the action of the tension of the welding wire 6. The welding wire tension sensor 15 detects the tension of the wire wheel 22, thereby controlling the driving of the I-wheel driving motor 14. The welding wire 6 passes through the bottom, top, and bottom of the three wire wheels 22 in sequence, forming a curved trajectory on the three wire wheels 22.

[0041] Furthermore, the welding wire constant tension automatic pay-off machine also includes a heating unit 100 and a temperature control unit 101, which are both fixed inside the frame 11, and the heating unit 100 and the temperature control unit 101 are electrically connected, and the heating unit 100 and the temperature control unit 101 are both connected to the mains, for controlling the internal temperature of the frame 11, keeping it dry, and preventing the welding wire 6 from getting damp.

[0042] Furthermore, the model of the welding wire tension sensor 15 is YHZL-5.

[0043] Furthermore, the cable position sensor 21 is a proximity switch. Specifically, the model of the cable position sensor 21 is B01AN35N.

[0044] Furthermore, the heating unit is a PTC heating element, and the model of the temperature control unit is MSP430.

[0045] It should be noted that in the production process of welding wire, the welding wire is firstly wound onto the I-shaped wheel. According to the existing supply requirements, the welding wire needs to be packed into the welding wire reel or welding wire barrel by the I-shaped wheel. The packing process consumes a lot of manpower and material resources, and increases the manufacturing cost. Taking steel welding wire and aluminum welding wire as examples, the packing cost is shown in Table 1:

[0046] Table 1 Comparison of packaging costs in welding wire production and manufacturing

[0047]

[0048] As can be seen from Table 1, the use of I-spools to load welding wire can save on the packaging process and packaging costs, thus reducing the manufacturing cost by RMB 700 to RMB 4,000 per ton of steel welding wire or aluminum welding wire.

[0049] Furthermore, the operation method of the welding wire constant tension automatic pay-off machine for the welding robot comprises the following steps:

[0050] Step 1: Use a layer winding machine to wind the welding wire 6 on the I-shaped wheel in layers, and the diameter of the welding wire 6 is 0.8-1.6 mm.

[0051] Step 2, fix the spool 3 on the frame 11 through two symmetrically arranged spool tops 13, and the spool tops 13 can rotate with the rotation of the spool 3.

[0052] Step 3, use the top cone 17 to tighten the I-shaped wheel 3.

[0053] Step 4, the welding wire 6 is led out from the I-shaped wheel 3, the window 5, the wire arrangement position sensor 21, and the wire wheel 22 in sequence.

[0054] Step 5, welding starts, and the wire pressing roller in front of the welding gun drives the welding wire 6 to be fed.

[0055] Step 6, when the welding wire tension sensor 15 detects the tension of the welding wire 6, the welding wire tension sensor 15 sends a start signal to the I-wheel drive motor 14 through the sending module, and the receiving module of the I-wheel drive motor 14 receives the start signal, and starts the I-wheel drive motor 14 through the control module, which drives the dial 16, the I-wheel 3, and the I-wheel top 13 to rotate in turn, and actively releases the welding wire 6 loaded on the I-wheel 3, and the I-wheel drive motor 14 can actively adjust the rotation speed according to the change of the tension of the welding wire 6 detected by the welding wire tension sensor 15, so as to keep the tension of the welding wire 6 constant.

[0056] Step 7, when the angle between the wire arrangement position sensor 21 and the welding wire 6 is not between 0-10°, the wire arrangement position sensor 21 sends an opening signal to the screw drive motor 24 through the sending module, and the acquisition module of the screw drive motor 24 obtains the opening signal, and starts the screw drive motor 24 through the control module, driving the screw 42 to rotate, and the screw 42 drives the nut 41, the cross bar 231, and the tilting rod 232 to move laterally in turn. When the angle between the wire arrangement position sensor 21 and the welding wire 6 is between 0-10°, the screw drive motor 24 stops.

[0057] Further, in step 6, the model of the transmitting module is JF24D-TX, the model of the receiving module is DZ3, and the model of the control module is stc89c52rc.

[0058] Furthermore, in step 7, the model of the sending module is JF24D-RX, the model of the acquiring module is XY-R03A, and the model of the control module is HAT72.

[0059] Furthermore, taking the production and welding of aluminum welding wire with a wire diameter of 1.2mm as an example, in the production of aluminum welding wire, after the last drawing and surface treatment, the finished wire is rolled onto the I-shaped wheel. In this case, the 800-type I-shaped wheel take-up machine can be used to take up the wire. A single 800-type I-shaped wheel is fully loaded with aluminum welding wire with a wire diameter of 1.2mm, and the net weight of the wire can reach 300kg. After the aluminum welding wire is fully loaded onto the I-shaped wheel, it will no longer enter the subsequent packaging process and can be directly packaged and sent to the welding user. The packaging method is simply to wrap the welding wire part on the I-shaped wheel with plastic film to play a moisture-proof role, saving money. A large number of cartons, plastic bags, pallets and other packaging materials have been dropped. After the I-spool is sent to the welding user, during welding, the operator will mount the I-spool on the welding pay-off machine, lead the welding wire out of the pay-off machine and pass it through the wire feed guide wheel in front of the welding gun according to the operating requirements, and then enter the welding gun to carry out normal welding. For welding users, each automatic welding machine is required to be equipped with an automatic pay-off machine for welding wire with constant tension. The welding user can choose the type of I-spool and the corresponding automatic pay-off machine for welding wire with constant tension. After the welding wire on the I-spool is used up, the I-spool can be returned to the welding wire manufacturer for reuse.

[0060] The 800-type I-shaped wheel is used to load 300kg of aluminum welding wire. Compared with the plastic reel loaded with 7kg of welding wire, the wire loading capacity is 42.8 times that of the plastic reel, which reduces the time of changing welding wire during welding by 857 minutes, which is about 14 hours. Compared with the welding wire barrel with a maximum loading capacity of 141kg of aluminum welding wire, the wire loading capacity is 2.12 times that of the barreled welding wire. Compared with the barreled welding wire, it not only increases the loading capacity, but the biggest advantage is that it avoids the twisting and tangling of the barreled welding wire during feeding, thus ensuring the welding quality.

[0061] Furthermore, taking the production and welding of 08Mn2Si steel welding wire with a commonly used wire diameter of 1.2mm as an example, in the production of welding wire, after the last drawing and surface treatment, the finished wire is rolled onto the I-shaped wheel. In this case, a 630-type I-shaped wheel take-up machine can be used to take up the wire. A single 630-type I-shaped wheel is fully taken up with steel welding wire with a wire diameter of 1.2mm, and the net weight of the taken-up welding wire can reach 350kg. After the welding wire is fully taken up on the I-shaped wheel, it will no longer enter the subsequent packaging process, and can be directly packaged and sent to the welding user. The packaging method is simply to wrap the welding wire part on the I-shaped wheel with plastic film to play a moisture-proof role. That is, a lot of cartons, plastic bags, pallets and other packaging materials are saved. After the I-spool is sent to the welding user, during welding, the operator will mount the I-spool on the welding pay-off machine, lead the welding wire out of the pay-off machine and pass it through the wire feed guide wheel in front of the welding gun according to the operating requirements, and then enter the welding gun to carry out normal welding. For welding users, each automatic welding machine is required to be equipped with an automatic pay-off machine for welding wire with constant tension. The welding user can choose the type of I-spool and the corresponding automatic pay-off machine for welding wire with constant tension. After the welding wire on the I-spool is used up, the I-spool can be returned to the welding wire manufacturer for reuse.

[0062] The 630-type I-shaped wheel is used to load 350kg of steel welding wire. Compared with the plastic reel loaded with 20kg of welding wire, the wire loading capacity is 17.5 times that of the plastic reel. The time for changing welding wire during welding is reduced by 350 minutes, which is about 5.8 hours. Compared with the welding wire barrel with a maximum loading capacity of 250kg of steel welding wire, the wire loading capacity is increased by 100kg. Compared with the barreled welding wire, it not only increases the loading capacity, but the biggest advantage is that it avoids the twisting and tangling of the barreled welding wire, thus ensuring the welding quality.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A welding wire constant tension automatic pay-off machine for a welding robot, characterized in that: include: An I-wheel clamping mechanism (1), a welding wire outlet mechanism (2), an I-wheel (3) for loading the welding wire (6), and a ball screw (4); The I-wheel (3) is rotatably connected to the inside of the I-wheel clamping mechanism (1); the ball screw (4) is fixedly connected to the top of the I-wheel clamping mechanism (1); the welding wire lead-out mechanism (2) is laterally movable and connected to the ball screw (4); a window (5) is provided on the top of the I-wheel clamping mechanism (1); the welding wire (6) passes through the window (5) and the welding wire lead-out mechanism (2) in sequence; when welding, the welding wire lead-out mechanism (2) moves as the lead-out position of the welding wire (6) on the I-wheel (3) changes; the welding wire lead-out mechanism (2) comprises a wire arrangement position sensor (21), a wire wheel (22), a connecting rod (23) and a screw drive motor (24) for driving the ball screw (4) to rotate; The wire arrangement position sensor (21) and the wire pulley (22) are both fixedly connected to the connecting rod (23), the connecting rod (23) is laterally movable and connected to the ball screw (4), the wire arrangement position sensor (21) is electrically connected to the screw drive motor (24), the screw drive motor (24) is fixedly connected to one end of the ball screw (4), the welding wire (6) passes through the wire arrangement position sensor (21) and the wire pulley (22) in sequence, and when welding, the screw drive motor (24) drives the ball screw (4) to rotate, so that the connecting rod (23) moves on the ball screw (4). The I-wheel clamping mechanism (1) comprises a frame (11) and a dust cover (12), wherein the dust cover (12) is arranged outside the I-wheel (3) and is integrally connected to the frame (11); the welding wire constant tension automatic pay-off machine further comprises a heating unit (100) and a temperature control unit (101), wherein the heating unit (100) and the temperature control unit (101) are both fixedly arranged inside the frame (11), and the heating unit (100) and the temperature control unit (101) are electrically connected; the I-wheel clamping mechanism (1) further comprises two I-wheel tops (13), wherein the two I-wheel tops (13) The two I-wheel tops (13) are symmetrically arranged on both sides of the I-wheel (3), and the two I-wheel tops (13) can rotate with the rotation of the I-wheel (3); the connecting rod (23) comprises a cross rod (231) and a tilting rod (232); one end of the cross rod (231) is fixedly connected to the ball screw (4), and the other end of the cross rod (231) is hinged to the middle of the tilting rod (232); the axis of the tilting rod (232) is parallel to the axis of the welding wire (6); the I-wheel clamping mechanism (1) also comprises a top cone (17), and the top cone (17) is fixedly connected to one of the I-wheel tops (13) of the two I-wheel tops (13). The I-wheel clamping mechanism (1) further comprises an I-wheel drive motor (14) and a welding wire tension sensor (15), wherein the I-wheel drive motor (14) and the welding wire tension sensor (15) are electrically connected, the welding wire tension sensor (15) is fixedly connected to the wire wheel (22), and the I-wheel drive motor (14) is fixedly connected to the other I-wheel top (13) of the two I-wheel tops (13), and when the welding wire tension sensor (15) detects the tension of the welding wire (6), the I-wheel drive motor (14) drives the I-wheel (3) to rotate so that the welding wire (6) is actively guided out;The welding wire derivation mechanism (2) comprises three wire wheels (22), the three wire wheels (22) are arranged on the tilting rod (232) in sequence, the welding wire tension sensor (15) is connected to the wire wheel (22) located in the middle, and the welding wire (6) passes through the bottom, top, and bottom of the three wire wheels (22) in sequence, forming a curved track on the three wire wheels (22).

2. An operating method of a welding wire constant tension automatic pay-off machine for a welding robot as claimed in claim 1, characterized in that: The steps include: Step 1, using a layer winding machine to wind the welding wire (6) on the I-shaped wheel, the diameter of the welding wire (6) is 0.8-1.6 mm; Step 2, fixing the spool (3) on the frame (11) by means of two symmetrically arranged spool tops (13), wherein the spool tops (13) can rotate along with the rotation of the spool (3); Step 3, using a top cone (17) to tighten the spool (3); Step 4, guiding the welding wire (6) through the I-shaped wheel (3), the window (5), the wire arrangement position sensor (21), and the wire wheel (22) in sequence; Step 5, welding is started, and the wire pressing roller in front of the welding gun drives the welding wire (6) to be fed; Step 6, when the welding wire tension sensor (15) detects the tension of the welding wire (6), the welding wire tension sensor (15) sends a start signal to the I-shaped wheel drive motor (14) through the sending module, and the receiving module of the I-shaped wheel drive motor (14) receives the start signal, and starts the I-shaped wheel drive motor (14) through the control module, which drives the dial (16), the I-shaped wheel (3), and the I-shaped wheel top (13) to rotate in sequence, and actively releases the welding wire (6) loaded on the I-shaped wheel (3), and the I-shaped wheel drive motor (14) can actively adjust the rotation speed according to the change of the tension of the welding wire (6) detected by the welding wire tension sensor (15), so as to keep the tension of the welding wire (6) constant; Step 7, when the angle between the wire arrangement position sensor (21) and the welding wire (6) is not between 0 and 10 degrees, the wire arrangement position sensor (21) sends a start signal to the screw drive motor (24) through the sending module, the acquisition module of the screw drive motor (24) acquires the start signal, and starts the screw drive motor (24) through the control module, driving the screw rod (42) to rotate, and the screw rod (42) drives the nut (41), the cross rod (231), and the tilt rod (232) to move horizontally in turn, and when the angle between the wire arrangement position sensor (21) and the welding wire (6) is between 0 and 10 degrees, the screw drive motor (24) stops.

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