Multi-machine collaborative welding method for grooves of thick plate winding drums

Abstract

The invention relates to a thick plate winding drum groove multi-machine collaborative welding method in the technical field of crane manufacturing, which comprises the following steps of: rolling a thick plate into winding drum sections, and forming a Y-shaped groove at a welding seam; the winding drum sections are placed on a supporting frame of multi-machine collaborative welding equipment, and it is guaranteed that the Y-shaped grooves are placed upwards; a ceramic gasket with a forced welding line forming groove type structure is pasted on the back face of the Y-shaped groove; adjusting multi-machine collaborative welding equipment according to the position of the welding seam; an MAG welding gun of the multi-machine collaborative welding equipment is used for welding the welding seam with the gap larger than 1.5 mm; one SAW welding gun in front of the multi-machine collaborative welding equipment and two SAW welding guns arranged in parallel behind the multi-machine collaborative welding equipment are used for welding the weld joints at the same time; according to the method, the welding seam of the thick plate roll simple groove is welded in an MAG + SAW composite welding mode, efficient welding of seam filling, backing welding and filling welding is achieved, the manufacturing period is greatly shortened, and the manufacturing efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of crane manufacturing, and in particular to a multi-machine collaborative welding method for thick plate drum grooves. Background Art

[0002] The drum is a key component in lifting and transport machinery, mainly used to wind ropes and transmit power, and bear the weight of the hoisted object. The drum transmits the driving force to the wound wire rope through its own rotational motion, and relies on the linear motion of the wire rope to realize the handling and transfer of goods.

[0003] At present, most of the reels of large lifting and transportation equipment are welded reels, which have obvious performance advantages due to their light weight and strong bearing capacity. However, welding reels require a large amount of welding work, and single-wire submerged arc welding is generally used. If there is a large gap in the welded joint, manual welding is required to fill the gap, which seriously restricts the production efficiency of the product. Therefore, the existing welding method needs to be improved urgently.

[0004] To this end, we provide a multi-machine collaborative welding method for thick plate drum beveling. Summary of the invention

[0005] In order to overcome the deficiencies in the background technology, the present invention discloses a multi-machine collaborative welding method for thick plate drum grooves.

[0006] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme: A multi-machine collaborative welding method for thick plate drum grooves comprises the following steps: Step 1: Roll the thick plate into roll segments and make a Y-shaped groove at the weld; Step 2: Place the drum segment on the support frame of the multi-machine collaborative welding equipment, and ensure that the Y-shaped groove is placed upward; Step 3: Paste a ceramic liner with a forced weld forming groove structure on the back of the Y-shaped groove; Step 4: Adjust the multi-machine collaborative welding equipment according to the weld position; Step 5: Use the MAG welding gun of the multi-machine collaborative welding equipment to weld the welds with a gap greater than 1.5 mm; Step 6: Use a SAW welding gun in front and two SAW welding guns in parallel at the rear of the multi-machine collaborative welding equipment to weld the weld at the same time; wherein, the SAW welding gun in front performs base welding, and the two SAW welding guns in the rear perform filling welding; the three SAW welding guns are distributed in a triangle, the spacing between the SAW welding gun in front and the SAW welding gun in the rear is 45~55mm, the gap between the two SAW welding guns in the rear is 30~50mm, and they are inclined 15±2° to the center of the weld; Step 7: Repeat step 6 until the groove filling welding is completed.

[0007] Preferably, the slope angle of the Y-shaped groove is 60±2°, and the blunt edge length is 1~2mm.

[0008] Preferably, the welding wire diameter of the MAG welding gun is 1.2 mm, the welding current is 250-270 A, and the welding speed is 500-650 mm / min.

[0009] Preferably, the welding wire diameter of the front SAW welding gun is 4 mm, the welding current is 580-620 A, and the welding speed is 550-600 mm / min; the welding wires of the two rear SAW welding guns are 2 mm, and the welding current is 360-390 A.

[0010] Preferably, when performing step six for the first time, the SAW welding gun is operated together with the MAG welding gun, and the welding speed is 550-600 mm / min; Among them, the front SAW welding gun is located 50~100mm behind the MAG welding gun, and the welding current of the front SAW welding gun is 550~600A.

[0011] Preferably, before MAG welding or SAW welding, the weld is pre-scanned using a visual sensor of the multi-machine collaborative welding equipment, and the start and end positions and height of the multi-machine collaborative welding equipment are adjusted according to the weld information.

[0012] Preferably, the multi-machine cooperative welding equipment comprises a support frame and a front and rear slide rail pair installed on one side thereof, the sliding parts of the front and rear slide rail pair are provided with a vertical slide rail pair, the sliding part of the vertical slide rail pair is provided with a left and right slide rail pair, and the sliding parts of the left and right slide rail pairs are provided with a mounting frame at one end of the support frame corresponding to one end of the support frame; A MAG welding gun, a SAW welding gun and two SAW welding guns are sequentially arranged along the mounting frame from front to back, wherein the three SAW welding guns are distributed in a triangle.

[0013] Preferably, the mounting frame is further provided with a visual sensor located in front of the MAG welding gun.

[0014] Preferably, the support frame includes two support wheel groups spaced apart at the front and rear, and the support wheel group has two support wheels spaced apart at the left and right, so as to stably support the reel segment.

[0015] Preferably, the mounting frame is horizontally rotatable and is arranged at one end of the sliding part of the left and right slide rail pairs. After step six, the mounting frame is horizontally rotated a certain angle, and the operation of repeating step six is ​​completed during the return process of the sliding part of the front and rear slide rail pairs.

[0016] Due to the adoption of the above-mentioned technical solution, the present invention has the following beneficial effects: 1. The MAG+SAW composite welding method is used for the welding of thick plate coil groove welds, which realizes the efficient welding of caulking, base welding and filling welding, greatly shortens the manufacturing cycle and improves the manufacturing efficiency. The three SAW welding guns are distributed in a triangle, and the two SAW welding guns at the rear are tilted, which can increase the distance between the SAW welding guns, so that the position of the molten pool in the parent material accounts for about 2 / 3 of the molten pool. The heat dissipation depends on the parent material to ensure the impact performance of the weld and the heat-affected zone and the stability of the weld quality; 2. The operation of the SAW welding gun together with the MAG welding gun enables the SAW welding gun to effectively utilize the residual heat after the MAG welding gun is used. While ensuring the welding quality, the welding current of the SAW welding gun is effectively reduced, achieving the effect of energy saving; 3. The design of Y-shaped groove and ceramic liner helps to form a good shape on the back of the weld, avoiding common welding defects such as weld nodules or incomplete penetration; 4. For weld gaps greater than 1.5 mm, use a MAG welding gun to process them first to ensure that the subsequent SAW welding gun performs fill welding under more ideal conditions. This not only improves the welding quality, but also increases the adaptability of the process to different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the multi-machine cooperative welding equipment in the present invention; Figure 2 It is a schematic diagram of the assembly structure of the mounting frame and the welding gun in the present invention; Figure 3 It is a rear view of the mounting frame of the present invention; Figure 4 It is a right side view of the mounting frame in the present invention.

[0018] In the figure: 1. support frame; 11. support wheel group; 111. support wheel; 2. front and rear slide rail pairs; 3. vertical slide rail pairs; 4. left and right slide rail pairs; 5. mounting frame; 6. MAG welding gun; 7. SAW welding gun; 8. visual sensor. DETAILED DESCRIPTION

[0019] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. indicating directions or positional relationships, they only correspond to the drawings of the present application and are for the convenience of describing the present invention; it should be understood that if there are terms such as "end", "side", "end portion", "lateral", "lateral", "transverse", "longitudinal", etc. indicating directions or positional relationships, they only correspond to the length and width of the corresponding components, that is, the "end portion" indicates the head and tail areas in the length direction of the corresponding component, and the "side portion" indicates the head and tail areas in the width direction of the corresponding component; this is for the convenience of describing the present invention and is not to indicate or imply that the device or element referred to must have a specific direction.

[0020] Embodiment 1, in combination with the attached Figure 1-4 , a multi-machine collaborative welding method for thick plate drum groove, comprising the following steps: Step 1: Roll the thick plate into roll segments and make a Y-shaped groove at the weld.

[0021] According to the needs, the slope angle of the Y-type groove is 60 ± 2°, and the blunt edge length is 1~2mm.

[0022] Specifically, a plate rolling machine is used to roll the thick plate into roll segments.

[0023] Step 2: Place the drum segment on the support frame 1 of the multi-machine collaborative welding equipment, and ensure that the Y-shaped groove is placed upward; It should be noted that: when the weld is a circular weld, the reel only needs to be placed horizontally, and there is no need to rotate and adjust the angle of the reel.

[0024] According to the needs, the support frame 1 includes two support wheel groups 11 spaced apart in the front and rear, and the support wheel group 11 has two support wheels 111 spaced apart in the left and right, that is, the reel segment is stably supported by the two support wheel groups 11; specifically, the spacing between the two support wheel groups 11 is set according to the axial length of the reel segment, preferably, the spacing between the two support wheel groups 11 is 2 / 3 to 3 / 4 of the axial length of the reel segment. Specifically, the support wheel group 11 also has a wheel frame for fixing the two support wheels 111.

[0025] As required, the support wheel set 11 may also have a structure for braking the support wheel 111. In this way, the angle of the reel can be adjusted when the support wheel 111 is not braked, and the reel segment can be ensured to be stable and not rotated when the support wheel 111 is braked.

[0026] Step 3: Paste the ceramic liner on the back of the Y-shaped groove; ensure that the back weld is formed during the base welding. It should be noted that the ceramic liner itself has a groove structure that forces the weld to be formed. The molten pool flows into the groove structure of the ceramic liner and solidifies into the shape of the weld along the shape of the groove.

[0027] Step 4: Adjust the multi-machine collaborative welding equipment according to the weld position; Step 5: Use the MAG welding gun 6 of the multi-machine collaborative welding equipment to weld the position where the weld gap is greater than 1.5 mm.

[0028] As required, the welding wire diameter of the MAG welding gun 6 is 1.2 mm, the welding current is 250-270 A, and the welding speed is 500-650 mm / min.

[0029] As needed, the multi-machine collaborative welding equipment includes a support frame 1 and a front and rear slide rail pair 2 installed on one side thereof, the sliding part of the front and rear slide rail pair 2 is provided with a vertical slide rail pair 3, the sliding part of the vertical slide rail pair 3 is provided with a left and right slide rail pair 4, and the sliding part of the left and right slide rail pairs 4 is provided with a mounting frame 5 corresponding to one end of the support frame 1; the MAG welding gun 6 is installed on the mounting frame 5.

[0030] According to needs, in order to improve the practicability of the multi-machine cooperative welding equipment, the mounting frame 5 can be horizontally rotatably arranged on the sliding part of the left and right slide rail pairs 4.

[0031] Furthermore, the mounting frame 5 is correspondingly connected to the sliding parts of the left and right slide rail pairs 4 through a rotating structure with a locking function, so that the mounting frame 5 can be rotated to a certain angle when it needs to be rotated, and its position can be kept fixed when it does not need to be rotated. The above-mentioned rotating structure can adopt the structure of manually rotating the mounting frame 5 in the prior art, and can also be equipped with a power system to realize the function of automatically rotating the mounting frame 5. For example, it includes a vertically arranged rotating rod, a sleeve sleeved on the outside of the rotating rod, and a locking screw screwed on the sleeve body, and the position of the rotating rod and the sleeve is fixed by the locking screw, wherein the rotating rod or the sleeve is fixed to the mounting frame 5, and the sleeve or the rotating rod is fixed to the sliding part of the left and right slide rail pairs 4.

[0032] Step 6: Use the front SAW welding gun 7 and the rear two SAW welding guns 7 of the multi-machine cooperative welding equipment to weld the weld at the same time; wherein the front SAW welding gun 7 performs base welding, and the rear two SAW welding guns 7 perform filling welding; According to the needs, the welding wire diameter of the front SAW welding gun 7 is 4mm, the current is 580~620A, and the welding speed is 550~600mm / min; the welding wires of the two rear SAW welding guns 7 are 2mm, and the current is 360~390A.

[0033] It should be noted that: since the front SAW welding gun 7 and the rear SAW welding gun 7 operate simultaneously, the welding speed of the rear SAW welding gun 7 is the same as the welding speed of the front SAW welding gun 7.

[0034] As required, three SAW welding guns 7 are distributed in a triangle shape and are all installed on the mounting frame 5; the distance between the front SAW welding gun 7 and the rear SAW welding gun 7 is 45-55 mm, and the gap between the two rear SAW welding guns 7 is 30-50 mm; in this way, the two rear SAW welding guns 7 can utilize the residual heat after welding by the front SAW welding gun 7, and appropriately reduce the welding current of the two rear SAW welding guns 7 while ensuring the welding quality. The two rear SAW welding guns 7 are tilted 15±2° toward the center of the weld; in this way, the distance between the two rear SAW welding guns 7 can be increased, so that the position of the molten pool in the parent material accounts for about 2 / 3 of the molten pool, and the heat can be dissipated by relying on the parent material to ensure the impact performance of the weld and the heat-affected zone. It should be noted that there is a certain relationship between the welding speed of the SAW welding gun 7 and the spacing between the three SAW welding guns 7, as well as the tilt angle of the two rear SAW welding guns 7. Otherwise, the following situations are likely to occur: 1. When the welding speed is higher than the limit value, poor weld formation and incomplete penetration of the base weld are likely to occur; 2. When the welding speed is lower than the limit value, the triangular arrangement of the three SAW welding guns 7 will cause heat concentration, weld penetration and excessive heat input per unit length, which will affect the mechanical properties of the weld. However, the tilted arrangement of the two rear SAW welding guns 7 reduces the lower limit of the welding speed by using the base material to dissipate heat.

[0035] It should be noted that the front and rear orientation is defined according to the direction in which the welding gun moves during the welding process; specifically, the direction in which the welding gun moves is forward.

[0036] Step 7: Repeat step 6 until the groove filling welding is completed.

[0037] During operation, before performing step seven, the mounting frame 5 can be horizontally rotated to a certain angle as needed to complete the return process of the sliding parts of the front and rear slide rail pairs 2 and repeat step six.

[0038] Embodiment 2, combined with the attached Figure 1-4 A multi-machine collaborative welding method for thick plate drum groove is different from the embodiment 1 in that step 5 and step 6 in the embodiment 1 are combined and executed so that the MAG welding gun 6 and the SAW welding gun 7 work simultaneously.

[0039] At this time, the welding speed is: 550 ~600mm / min.

[0040] In this embodiment, the SAW welding gun 7 is located 50-100 mm behind the MAG welding gun 6 .

[0041] It should be noted that: since the waste heat generated by the operation of the MAG welding gun 6 (the temperature at the weld will increase to a certain extent) will be used by the SAW welding gun 7 in front, the current input of the SAW welding gun 7 can be appropriately reduced while ensuring the welding quality. At this time, the welding current of the SAW welding gun 7 in front is 550~600A, thereby achieving the effect of energy saving.

[0042] It should be noted that: when step 6 is executed for the first time, step 6 and step 5 are executed simultaneously; when step 6 is repeated later, only the three SAW welding guns 7 are operated, and the MAG welding gun 6 is no longer operated. Embodiment 3, in combination with the attached Figure 1-4 , a thick plate drum groove multi-machine collaborative welding method, which is different from the embodiment 1 in that a visual sensor 8 is also installed at the position of the mounting frame 5 located in front of the MAG welding gun 6.

[0043] At this time, step five in Example 1 is changed to: use the visual sensor 8 of the multi-machine collaborative welding equipment to pre-scan the weld, adjust the starting and ending positions and height of the multi-machine collaborative welding equipment according to the weld information, and use the MAG welding gun 6 of the multi-machine collaborative welding equipment to weld the position where the weld gap is greater than 1.5 mm.

[0044] In this embodiment, as required, the MAG welding gun 6 can be mounted on the mounting frame 5 through a linear slide rail pair arranged in the left and right directions, and the left and right positions of the MAG welding gun 6 can be adjusted in real time through a larger weld gap position. Specifically, the multi-machine collaborative welding equipment also has a control system connected to the visual sensor 8, and the left and right positions of the MAG welding gun 6 can be adjusted in real time through the interaction between the visual sensor 8 and the control system.

[0045] It should be noted that the adjustment of the left and right position of the MAG welding gun 6 is a small distance adjustment, and the general adjustment range is within 5 mm, so the length of the linear guide rail pair does not need to be designed to be too long.

[0046] As required, the MAG welding gun 6 can also be mounted on the mounting frame 5 by an oscillator, and when the MAG welding gun 6 is not in use, the height of the MAG welding gun 6 is raised by the oscillator. That is, when the SAW welding gun is repeatedly performed, the height of the MAG welding gun 6 is raised by the oscillator. Of course, when the oscillator is not equipped, the height of the MAG welding gun 6 can be raised manually.

[0047] Embodiment 4, in combination with the attached Figure 1-4 , a thick plate drum groove multi-machine collaborative welding method, which is different from the third embodiment in that a visual sensor 8 is also installed at the position of the mounting frame 5 located in front of the MAG welding gun 6.

[0048] Steps 5 and 6 in the third embodiment are combined and executed so that the MAG welding gun 6 and the SAW welding gun 7 operate simultaneously.

[0049] At this time, the welding speed is: 550 ~600mm / min.

[0050] In this embodiment, the SAW welding gun 7 is located 50-100 mm behind the MAG welding gun 6 .

[0051] It should be noted that: since the waste heat generated by the operation of the MAG welding gun 6 (the temperature at the weld will increase to a certain extent) will be used by the SAW welding gun 7 in front, the current input of the SAW welding gun 7 can be appropriately reduced while ensuring the welding quality. At this time, the welding current of the SAW welding gun 7 in front is 550~600A, thereby achieving the effect of energy saving.

[0052] It should be noted that the above-mentioned linear guide rail pairs all adopt existing equipment equipped with a power source, which will not be described in detail at this time.

[0053] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the present invention.

Claims

1. A multi-machine collaborative welding method for thick plate drum groove, characterized in that: The following steps are involved: Step 1: Roll the thick plate into roll segments and make a Y-shaped groove at the weld; Step 2: Place the drum segment on the support frame (1) of the multi-machine collaborative welding equipment, and ensure that the Y-shaped groove is placed upward; Step 3: Paste a ceramic liner with a forced weld forming groove structure on the back of the Y-shaped groove; Step 4: Adjust the multi-machine collaborative welding equipment according to the weld position; Step 5: Use the MAG welding gun (6) of the multi-machine collaborative welding equipment to weld the weld with a gap greater than 1.5 mm; Step 6: using a front SAW welding gun (7) and two rear SAW welding guns (7) of the multi-machine collaborative welding equipment to weld the weld at the same time; the front SAW welding gun (7) performs base welding, and the rear two SAW welding guns (7) perform filling welding; The three SAW welding guns (7) are arranged in a triangle shape, the distance between the front SAW welding gun (7) and the rear SAW welding gun (7) is 45-55 mm, the gap between the two rear SAW welding guns (7) is 30-50 mm, and they are inclined 15 ± 2° toward the center of the weld; Step 7: Repeat step 6 until the groove filling welding is completed.

2. The thick plate drum groove multi-machine collaborative welding method according to claim 1 is characterized in that: The Y-shaped groove has a slope angle of 60 ± 2° and a blunt edge length of 1 to 2 mm.

3. The thick plate drum groove multi-machine collaborative welding method according to claim 1 is characterized in that: The welding wire diameter of the MAG welding gun (6) is 1.2 mm, the welding current is 250-270 A, and the welding speed is 500-650 mm / min.

4. The thick plate drum groove multi-machine collaborative welding method according to claim 1 is characterized in that: The welding wire diameter of the front SAW welding gun (7) is 4 mm, the welding current is 580-620 A, and the welding speed is 550-600 mm / min; the welding wires of the two rear SAW welding guns (7) are 2 mm, and the welding current is 360-390 A.

5. The thick plate drum groove multi-machine collaborative welding method according to claim 1 is characterized in that: When performing step 6 for the first time, the SAW welding gun (7) is operated together with the MAG welding gun (6), and the welding speed is 550-600 mm / min; The front SAW welding gun (7) is located 50 to 100 mm behind the MAG welding gun (6), and the welding current of the front SAW welding gun (7) is 550 to 600 A.

6. The multi-machine coordinated welding method for thick plate drum groove according to any one of claims 1 to 5, characterized in that: Before MAG welding or SAW welding, the weld is pre-scanned using a visual sensor (8) of the multi-machine collaborative welding device, and the start and end positions and height of the multi-machine collaborative welding device are adjusted according to the weld information.

7. The thick plate drum groove multi-machine collaborative welding method according to claim 1 is characterized in that: The multi-machine cooperative welding equipment comprises a support frame (1) and a front and rear slide rail pair (2) mounted on one side thereof, the sliding part of the front and rear slide rail pair (2) being provided with a vertical slide rail pair (3), the sliding part of the vertical slide rail pair (3) being provided with a left and right slide rail pair (4), and the sliding part of the left and right slide rail pair (4) being provided with a mounting frame (5) at one end of the support frame (1); The mounting frame (5) is provided with a MAG welding gun (6), a SAW welding gun (7) and two SAW welding guns (7) in sequence from front to back, wherein the three SAW welding guns (7) are distributed in a triangle.

8. The thick plate drum groove multi-machine collaborative welding method according to claim 6 is characterized in that: The multi-machine cooperative welding equipment comprises a support frame (1) and a front and rear slide rail pair (2) mounted on one side thereof, the sliding part of the front and rear slide rail pair (2) being provided with a vertical slide rail pair (3), the sliding part of the vertical slide rail pair (3) being provided with a left and right slide rail pair (4), and the sliding part of the left and right slide rail pair (4) being provided with a mounting frame (5) at one end of the support frame (1); The mounting frame (5) is provided with a visual sensor (8), a MAG welding gun (6), a SAW welding gun (7) and two SAW welding guns (7) in sequence from front to back, wherein the three SAW welding guns (7) are distributed in a triangle.

9. The thick plate drum groove multi-machine collaborative welding method according to claim 7 or 8, characterized in that: The support frame (1) comprises two support wheel groups (11) spaced apart at the front and rear, and the support wheel group (11) comprises two support wheels (111) spaced apart at the left and right, for stably supporting the reel segment.

10. The thick plate drum groove multi-machine collaborative welding method according to claim 7 or 8, characterized in that: The mounting frame (5) is horizontally rotatable and is arranged at one end of the sliding part of the left and right slide rail pairs (4). After step six, the mounting frame (5) is horizontally rotated by a certain angle, and the operation of repeating step six is ​​completed during the return process of the sliding part of the front and rear slide rail pairs (2).

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