Flange butt welding machine and its welding process

Abstract

This invention discloses a flange butt welding machine and its welding process, relating to the field of flash butt welding machines. It solves the problem that long-term wear of a single clamping part in existing flange butt welding machines and their welding processes affects clamping stability and welding accuracy. The machine includes a body, a welding mechanism, a switching mechanism, and a grinding mechanism. The body has a first device box and a second device box. The welding mechanism includes a fixed box and a lifting box, each with a clamping disc. The switching mechanism includes a threaded shaft, and the grinding mechanism includes a grinding rod. This flange butt welding machine and its welding process facilitate the movement of the second device box and the lifting box via the welding mechanism, enabling the clamping and contact flash welding operation of the flange. The switching mechanism, in conjunction with the threaded shaft, rotates at a set angle to fine-tune the position of the clamping discs. The grinding mechanism simultaneously and rapidly grinds four sets of clamping discs, ensuring consistent and controllable grinding thickness, thus extending the service life of the clamping discs.

Description

Technical Field

[0001] The invention relates to the technical field of flash butt welding machines, in particular to a flange butt welding machine and a welding process thereof. Background Art

[0002] The basic principle of the flash welding machine is the same as that of resistance welding. It uses the resistance heat generated when the current passes through the workpiece to heat the weldment, and then achieves the purpose of welding through upsetting (extrusion). When the current passes between the two workpieces, due to the large resistance between the contact points of the two workpieces, the end faces are quickly heated due to the electrothermal effect. The contact surfaces of the two workpieces are uneven in microscopic terms, so the first contact points are some protruding points. After these contact points are energized, they are instantly heated to a molten state, thereby forming multiple liquid metal beams between the contact surfaces of the workpieces. These beams are "exploded" and destroyed during further heating, causing the molten metal to fly out of the gaps in the contact surfaces of the workpieces, forming flashes, and at the same time, further heating the workpieces. Through continued heating and continuous flashing, the temperature of the end faces of the workpieces gradually becomes uniform, forming a thin layer of molten metal to prevent the intrusion of surrounding gases. At the same time, the upsetting force is quickly applied to force the welding surfaces to squeeze each other, so that the crater formed during the flash is fully closed, and all the liquid metal is squeezed out to weld the two workpieces into one.

[0003] When using the existing flash butt welding machine, two sets of clamps (each set of clamps includes two clamping blocks) are generally used to clamp the two sets of workpieces to be welded. Since the workpieces will also wear the surface of the clamping blocks during the clamping and extrusion process, if the same workpiece is processed for a long time, the specific position on the clamping block will be constantly worn, resulting in slight deviations when controlling the position of the clamping block, affecting the accuracy of welding. Frequent replacement of clamping blocks will increase production costs and reduce processing efficiency. To this end, we propose a flange butt welding machine and its welding process. Summary of the invention

[0004] The purpose of the present invention is to provide a flange butt welding machine and a welding process thereof which are convenient for reducing the local wear intensity of the clamping part and prolonging the service life of the equipment, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a flange butt welding machine, comprising a machine body, a welding mechanism, a switching mechanism and a grinding mechanism, wherein a first device box is fixedly connected to the machine body, a second device box is slidably connected to the machine body in a horizontal direction, the welding mechanism comprises two groups of fixed boxes respectively fixedly installed on the first device box and the second device box, the first device box and the second device box are respectively slidably connected to a lifting box in a vertical direction, the fixed box and the lifting box are respectively provided with a clamping plate, the welding mechanism is used to drive the second device box and the lifting box to move, so as to realize the clamping and contact flash welding operation of the flange, the switching mechanism comprises four groups of threaded shafts rotatably connected to the lifting box and the fixed box, respectively. The clamping disk is provided with a threaded groove threadably connected to the threaded shaft. The switching mechanism is used to link the threaded shaft to rotate a set angle each time the welding mechanism runs, so as to complete the fine adjustment of the position of the clamping disk to avoid repeated wear of the same position each time clamping. The grinding mechanism includes four groups of grinding rods installed on the machine body. When the surface of the clamping disk is severely worn, the grinding mechanism is used to control the four groups of clamping disks to rotate synchronously and rapidly, and at the same time drive the four groups of grinding rods to synchronously resist the surface of the clamping disk to realize the grinding operation. The grinding thickness remains consistent and the thickness is controllable, so that the clamping disk after grinding can still perform synchronous and stable clamping and welding operations, which is convenient for reducing the local wear intensity of the clamping part and extending the service life of the equipment.

[0006] Preferably, the welding mechanism also includes a guide rail fixedly mounted on the machine body, a sliding block is slidably connected in the guide rail along the horizontal direction, the top of the sliding block is fixedly connected to the bottom of the second device box, a first electric telescopic rod is fixedly connected to the guide rail, the telescopic end of the first electric telescopic rod is fixedly connected to one side of the sliding block, and a lifting member is provided on the machine body for driving the lifting box to perform lifting and lowering adjustment, so as to facilitate the clamping and abutment flash welding operations of the flange.

[0007] Preferably, the switching mechanism also includes a first worm gear coaxially fixedly connected to the threaded shaft, the fixed box and the lifting box are respectively rotatably connected with a first worm gear meshing with the first worm gear, the two groups of the first worm gears located on one side of the first device box are respectively coaxially fixedly connected with a first sliding sleeve, the first worm gears located on one side of the second device box are respectively coaxially fixedly connected with a first sliding rod that can be slidably connected to the inner wall of the first sliding sleeve in a horizontal direction, and the second device box is provided with a rotating part for driving the first worm gear to rotate intermittently, so that each time the welding mechanism runs once, the threaded shaft is linked to rotate a set angle to complete the fine adjustment of the position of the clamping disk to avoid repeated wear of the same position during each clamping.

[0008] Preferably, the rotating member includes two groups of second worm wheels coaxially fixedly installed on one end of the first worm gears near one side of the second device box, the fixed box and the lifting box are both rotatably connected with a second worm gear meshing with the second worm wheel, one group of the second worm gears is coaxially fixedly connected with a second sliding sleeve, and the other group of the second worm gears is coaxially fixedly connected with a second sliding rod slidably connected to the inner wall of the second sliding sleeve in a vertical direction, and the sliding block is provided with a driving member for driving the second worm gear to rotate intermittently, so as to drive the first worm gear to rotate intermittently.

[0009] Preferably, the driving member includes a driving disk rotatably connected to the sliding block, the bottom end of the second worm is coaxially fixedly connected to the driving disk, the outer wall of the driving disk is evenly rotatably connected to multiple groups of ratchets through a spring shaft, and a bevel gear block is fixedly connected to the side of the guide rail to facilitate driving the second worm to rotate intermittently.

[0010] Preferably, the grinding mechanism also includes a second electric telescopic rod fixedly mounted on the first device box, the telescopic end of the second electric telescopic rod is fixedly connected to a connecting frame, and the connecting frame is fixedly connected to two groups of guide rods, and the two groups of guide rods are respectively slidably connected to two groups of guide blocks in a vertical direction, and the four groups of grinding rods are respectively plugged and fixed with the four groups of guide blocks, and the first device box is provided with a control member for controlling the opening and closing of the grinding rods at a set position, and the sliding block is fixedly connected to a driving motor, and the output end of the driving motor is coaxially fixedly connected to the bottom of the driving disk, so that when the surface of the clamping disk is severely worn, the four groups of grinding rods are controlled to synchronously contact the surface of the clamping disk to realize the grinding operation, and the grinding thickness remains consistent and the thickness is controllable, so that the clamping disk after grinding can still perform synchronous and stable clamping and welding operations.

[0011] Preferably, the control component includes a mounting frame fixedly mounted on the first device box, two groups of trapezoidal blocks are fixedly connected to the mounting frame, and a triangular block is fixedly connected to the guide block. The inclined surface of the triangular block can slide and fit with the inclined surface of the trapezoidal block, so as to facilitate the control of the opening and closing of the grinding rod at a set position.

[0012] Preferably, the lifting member includes a third electric telescopic rod fixedly mounted on the machine body, the telescopic end of the third electric telescopic rod is fixedly connected to a guide frame, and the top end of the lifting box is fixedly connected to a driving block that is slidably connected to the guide frame in a horizontal direction, so as to drive the lifting box to be lifted and lowered.

[0013] Preferably, the upper and lower ends of the guide rod are respectively fixedly connected with fixed blocks, and the guide block is fixedly connected with an elastic member fixedly connected to the adjacent fixed block. The elastic member is a spring to facilitate pushing and buffering the position of the guide block.

[0014] The welding process of flange butt welding machine includes the following steps:

[0015] S1. Place the two sets of flange workpieces to be welded on the clamping plates on the fixed boxes on both sides respectively, start the welding mechanism, drive the lifting box to move downward, so that the clamping plates on the upper and lower sides are close to each other to complete the clamping of the workpieces, and then push the second device box toward the first device box so that the welding points of the workpieces on both sides are in conflict with each other, and then energize the clamping plates on both sides to complete the flash welding operation. After the welding is completed, control the second device box to slide back and reset, and the lifting box moves up and reset;

[0016] S2. When the second device box completes a reciprocating sliding operation, the switching mechanism will be linked to drive the threaded shaft to rotate the set angle, thereby completing the switching of the clamping point of the clamping disk to avoid repeated wear of the same position each time the clamping is performed;

[0017] S3. When the surface of the clamping disk is severely worn, the grinding mechanism controls the four groups of clamping disks to rotate rapidly and synchronously, and at the same time drives the four groups of grinding rods to synchronously resist the surface of the clamping disk to achieve the grinding operation, and the grinding thickness remains consistent and controllable, so that the clamping disk after grinding can still perform synchronous and stable clamping and welding operations.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The flange butt welding machine and the welding process thereof provided by the present invention solve the problem that the long-term wear of a single clamping part during use of the existing flange butt welding machine and the welding process thereof affects the clamping stability and welding accuracy. The two groups of flange workpieces to be welded are respectively placed on the clamping plates on the fixed boxes on both sides, the welding mechanism is started, and the lifting box is driven to move downward so that the upper and lower clamping plates are close to each other to complete the clamping of the workpieces, and then the second device box is pushed toward the first device box so that the welding points of the workpieces on both sides contact each other, and then the clamping plates on both sides are energized to complete the flash welding operation. After the welding is completed, the second device box is controlled to slide in the opposite direction and reset, and the lifting box is moved up and reset, and a reciprocating sliding operation is completed in the second device box. During dynamic operation, the switching mechanism will be linked to drive the threaded shaft to rotate the set angle, thereby completing the switching of the clamping point of the clamping disk to avoid repeated wear of the same position each time clamping. When the surface of the clamping disk is severely worn, the grinding mechanism controls the four groups of clamping disks to rotate synchronously and quickly, and at the same time drives the four groups of grinding rods to synchronously resist the surface of the clamping disk to achieve the grinding operation. The grinding thickness remains consistent and controllable, so that the clamping disk after grinding can still perform synchronous and stable clamping and welding operations. The device is easy to operate and has a high degree of automation. It can automatically control the clamping disk for fine-tuning without a motor, avoiding continuous wear at a single position, and effectively extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the welding mechanism structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the internal structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the grinding mechanism structure of the present invention;

[0024] Figure 5 It is a schematic diagram of the structure of the switching mechanism of the present invention;

[0025] Figure 6 for Figure 5 A magnified image of area A;

[0026] Figure 7 It is a schematic diagram of the structure of the driving member of the present invention;

[0027] Figure 8 for Figure 7 Enlarged view of area B;

[0028] Fig. 9 for Figure 7 Enlarged view of area C in the middle;

[0029] Fig.10 It is a schematic diagram of the structure of the rotating part of the present invention;

[0030] Fig.11 This is a schematic diagram of the control structure of the present invention;

[0031] Fig.12 for Fig.11 Enlarged view of area D in the middle.

[0032] In the figure: 1-body; 2-first device box; 3-second device box; 4-welding mechanism; 5-fixed box; 6-lifting box; 7-clamping plate; 8-switching mechanism; 9-threaded shaft; 10-threaded groove; 11-grinding mechanism; 12-grinding rod; 13-guide rail; 14-sliding block; 15-first electric telescopic rod; 16-lifting member; 17-first worm gear; 18-first worm; 19-first sliding sleeve; 20-first sliding rod; 21-rotating member; 22-second worm Wheel; 23-second worm; 24-second sliding sleeve; 25-second sliding rod; 26-driving member; 27-driving plate; 28-ratchet; 29-bevel gear block; 30-second electric telescopic rod; 31-connecting frame; 32-guide rod; 33-guide block; 34-control member; 35-mounting frame; 36-trapezoidal block; 37-triangular block; 38-third electric telescopic rod; 39-guide frame; 40-driving block; 41-fixed block; 42-elastic member; 43-driving motor. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0034] See also Figure 1-Figure 12The flange butt welding machine shown in the figure includes a machine body 1, a welding mechanism 4, a switching mechanism 8 and a grinding mechanism 11. A first device box 2 is fixedly connected to the machine body 1, and a second device box 3 is slidably connected to the machine body 1 in the horizontal direction. The welding mechanism 4 includes two groups of fixed boxes 5 respectively fixedly installed on the first device box 2 and the second device box 3. The first device box 2 and the second device box 3 are respectively slidably connected to the lifting box 6 in the vertical direction. The fixing box 5 and the lifting box 6 are respectively provided with a clamping plate 7. The welding mechanism 4 is used to drive the second device box 3 and the lifting box 6 to move to realize the clamping and contact flash welding operation of the flange. The switching mechanism 8 includes four groups of lifting boxes 6 and the fixing box 5 respectively rotatably connected The threaded shaft 9 and the clamping plate 7 are provided with a threaded groove 10 which is threadedly connected to the threaded shaft 9. The switching mechanism 8 is used to link the threaded shaft 9 to rotate the set angle each time the welding mechanism 4 runs, so as to complete the fine adjustment of the position of the clamping plate 7 to avoid repeated wear of the same position each time clamping. The grinding mechanism 11 includes four groups of grinding rods 12 installed on the body 1. The grinding mechanism 11 is used to control the four groups of clamping plates 7 to rotate synchronously and quickly when the surface of the clamping plate 7 is severely worn, and at the same time drive the four groups of grinding rods 12 to synchronously resist the surface of the clamping plate 7 to realize the grinding operation. The grinding thickness remains consistent and the thickness is controllable, so that the clamping plate 7 after grinding can still perform synchronous and stable clamping and welding operations.

[0035] See also Figure 1-Figure 12 The welding process of the flange butt welding machine shown in the figure includes the following steps:

[0036] S1. Place the two sets of flange workpieces to be welded on the clamping plates 7 on the fixed boxes 5 on both sides, start the welding mechanism 4, drive the lifting box 6 to move down, so that the upper and lower clamping plates 7 are close to each other to complete the clamping of the workpieces, and then push the second device box 3 toward the first device box 2, so that the welding points of the workpieces on both sides are in conflict with each other, and then energize the clamping plates 7 on both sides to complete the flash welding operation. After the welding is completed, control the second device box 3 to slide back and reset, and move the lifting box 6 up and reset;

[0037] S2. When the second device box 3 completes a reciprocating sliding operation, the switching mechanism 8 will be linked to drive the threaded shaft 9 to rotate the set angle, thereby completing the switching of the clamping point of the clamping plate 7 to avoid repeated wear of the same position each time the clamping is performed;

[0038] S3. When the surface of the clamping disk 7 is severely worn, the grinding mechanism 11 controls the four groups of clamping disks 7 to rotate rapidly and synchronously, and at the same time drives the four groups of grinding rods 12 to synchronously resist the surface of the clamping disk 7 to achieve the grinding operation, and the grinding thickness remains consistent and the thickness is controllable, so that the clamping disk 7 after grinding can still perform synchronous and stable clamping and welding operations.

[0039] In this embodiment, the four groups of clamping plates 7 are screwed onto the threaded shafts 9 for installation, and the two groups of flange workpieces to be welded are placed on the clamping plates 7 on the fixed boxes 5 on both sides, respectively. The welding mechanism 4 is started to drive the lifting box 6 to move downward, so that the upper and lower clamping plates 7 are close to each other to complete the clamping of the workpieces, and then the second device box 3 is pushed toward the first device box 2, so that the welding points of the workpieces on both sides are in conflict with each other, and then the clamping plates 7 on both sides are energized to complete the flash welding operation. After the welding is completed, the second device box 3 is controlled to slide in the opposite direction and reset, and the lifting box 6 is moved up and reset. When the second device box 3 completes a reciprocating sliding operation, the switching mechanism 8 will be linked to drive the threaded shaft 9 to rotate the set angle, thereby completing the switching of the clamping points of the clamping plates 7 to avoid the same position being clamped each time. Repeated wear, when the surface of the clamping disk 7 is severely worn, the grinding mechanism 11 controls the four groups of clamping disks 7 to rotate rapidly and synchronously, and at the same time drives the four groups of grinding rods 12 to synchronously resist the surface of the clamping disk 7 to achieve the grinding operation, and the grinding thickness remains consistent and the thickness is controllable, so that the clamping disk 7 after grinding can still perform synchronous and stable clamping and welding operations. The device is easy to operate and has a high degree of automation. It can automatically control the clamping disk 7 for fine-tuning without a motor, avoiding continuous wear at a single position, effectively extending the service life of the equipment, and the main circuit eliminates the traditional two-phase input and uses a three-phase variable frequency power input, so that the three-phase power grid is balanced, and the power factor reaches above 0.95, which greatly reduces the loss of energy consumption and improves the utilization rate of electric energy. Example 2

[0040] See also Figure 1-Figure 9 Embodiment 2 is described. This embodiment further describes Embodiment 1. The welding mechanism 4 shown in the figure also includes a guide rail 13 fixedly mounted on the body 1. A sliding block 14 is slidably connected in the guide rail 13 along the horizontal direction. The top of the sliding block 14 is fixedly connected to the bottom of the second device box 3. A first electric telescopic rod 15 is fixedly connected to the guide rail 13. The telescopic end of the first electric telescopic rod 15 is fixedly connected to one side of the sliding block 14. A lifting member 16 for driving the lifting box 6 to perform lifting and adjustment is provided on the body 1. The lifting member 16 includes a third electric telescopic rod 38 fixedly mounted on the body 1. The telescopic end of the third electric telescopic rod 38 is fixedly connected to a guide frame 39. The top of the lifting box 6 is fixedly connected to a driving block 40 slidably connected to the guide frame 39 along the horizontal direction.

[0041] See also Figure 5-Figure 10The switching mechanism 8 shown in the figure also includes a first worm gear 17 coaxially fixedly connected to the threaded shaft 9, and the first worm 18 meshing with the first worm gear 17 is rotatably connected in the fixed box 5 and the lifting box 6 respectively. The two groups of first worm gears 18 located on one side of the first device box 2 are coaxially fixedly connected to the first sliding sleeve 19 respectively, and the first worm gears 18 located on one side of the second device box 3 are coaxially fixedly connected to the first sliding rod 20 that can be slidably connected to the inner wall of the first sliding sleeve 19 in the horizontal direction. The second device box 3 is provided with a rotating member 21 for driving the first worm gear 18 to rotate intermittently.

[0042] See also Figure 5-Figure 10 The rotating member 21 shown in the figure includes a second worm wheel 22 coaxially fixedly installed at one end of two groups of first worm gears 18 near one side of the second device box 3. The fixed box 5 and the lifting box 6 are both rotatably connected with a second worm gear 23 meshing with the second worm gear 22. A second sliding sleeve 24 is coaxially fixedly connected to one group of second worm gears 23, and a second sliding rod 25 is coaxially fixedly connected to the inner wall of the second sliding sleeve 24 in a vertical direction on the other group of second worm gears 23. A driving member 26 for driving the second worm gear 23 to rotate intermittently is provided on the sliding block 14. The driving member 26 includes a driving disk 27 rotatably connected to the sliding block 14. The bottom end of the second worm gear 23 is coaxially fixedly connected to the driving disk 27. The outer wall of the driving disk 27 is evenly rotatably connected to multiple groups of ratchet teeth 28 through a spring shaft, and a bevel gear block 29 is fixedly connected to the side of the guide rail 13.

[0043] In this embodiment, the third electric telescopic rod 38 is used to drive the guide frame 39 to rise and fall, so that the driving block 40 and the lifting box 6 are adjusted to rise and fall, and the upper clamping plate 7 is controlled to press down to clamp the workpiece, and then the sliding block 14 is pushed and pulled by the first electric telescopic rod 15, thereby driving the second device box 3 to move horizontally back and forth, so that the welding points of the flange workpieces on both sides are energized after being contacted to complete flash welding, and the telescopic distance of the first electric telescopic rod 15 and the third electric telescopic rod 38 adopts an incremental PID control algorithm to achieve precise control.

[0044] It should be noted that: when the first electric telescopic rod 15 pushes the sliding block 14 and the second device box 3 to move and weld, the ratchet 28 on the sliding block 14 slides on the arc surface and the inclined surface of the bevel gear block 29. At this time, the bevel gear block 29 will not drive the ratchet 28 and the drive plate 27 to rotate, which also makes the position of the clamping plate 7 remain relatively stable during the clamping welding process and will not drive the workpiece to rotate together. When the welding is completed, the sliding block 14 slides in the opposite direction and resets. At this time, the tip of the ratchet 28 will gradually conflict with the vertical surface of the bevel gear block 29, thereby shifting the ratchet 28 and driving the drive plate 27 to rotate one grid. The rotation of the drive plate 27 drives the second worm 23 to rotate, the second worm 23 drives the second worm wheel 22, the second worm wheel 22 drives the first worm 18 to rotate, the first worm 18 drives the first worm wheel 17 to make the four groups of threaded shafts 9 rotate synchronously, and the threaded shaft 9 drives the clamping plate 7 to rotate finely.

[0045] Among them, by setting the first sliding sleeve 19 and the second sliding sleeve 24, the synchronous rotation relationship between the two groups of second worm gears 23 can always be maintained when the lifting box 6 is lifted or lowered, and the synchronous rotation relationship between the first worm gears 18 on both sides can be maintained when the second device box 3 slides horizontally. Since only one group of bevel gear blocks 29 is provided and is in a position where the sliding block 14 is about to be completely reset, the workpiece has been welded at this time, and the rotation of the clamping plate 7 can push the workpiece outward to assist in unloading. The device is easy to operate and has a high degree of automation. It can automatically control the clamping plate 7 for fine adjustment without the need for a motor. The drive adjustment by the worm driving the worm wheel to rotate can realize automatic limiting of the rotation angle of the worm wheel. There is no need to additionally set a limiting mechanism to limit the rotation angle of the clamping plate 7 one by one. The direction in which the threaded groove 10 is screwed into the threaded shaft 9 is opposite to the direction of rotation adjustment of the threaded shaft 9, so as to avoid the loosening of the clamping plate 7 caused by the continuous rotation of the threaded shaft 9. Example 3

[0046] See also Figure 4-Figure 12 Embodiment 3 is described. This embodiment further describes Embodiment 1. The grinding mechanism 11 shown in the figure also includes a second electric telescopic rod 30 fixedly mounted on the first device box 2. The telescopic end of the second electric telescopic rod 30 is fixedly connected to a connecting frame 31. Two groups of guide rods 32 are fixedly connected to the connecting frame 31. Two groups of guide blocks 33 are respectively connected in the two groups of guide rods 32 for sliding in the vertical direction. The four groups of grinding rods 12 are respectively plugged and fixed with the four groups of guide blocks 33. The first device box 2 is provided with a control member 34 for controlling the opening and closing of the grinding rods 12 at a set position. A driving motor 43 is fixedly connected to the sliding block 14. The model of the driving motor 43 is preferably YYHS-40. The output end of the driving motor 43 is coaxially fixedly connected to the bottom of the driving disk 27.

[0047] See also Figure 10-12The control member 34 shown in the figure includes a mounting frame 35 fixedly mounted on the first device box 2, two sets of trapezoidal blocks 36 are fixedly connected to the mounting frame 35, a triangular block 37 is fixedly connected to the guide block 33, the inclined surface of the triangular block 37 can slide and fit with the inclined surface of the trapezoidal block 36, the upper and lower ends of the guide rod 32 are respectively fixedly connected with fixed blocks 41, and the guide block 33 is fixedly connected with an elastic member 42 fixedly connected to the adjacent fixed block 41, and the elastic member 42 is a spring.

[0048] In this embodiment, when the surface of the clamping disk 7 is severely worn, some deeper grooves may appear, which may easily cause deviation when clamping the workpiece, causing the workpiece to slide into the groove, affecting the docking of the welding point. At the same time, due to the different depths of the grooves, it is difficult to accurately control the clamping and moving distance of the clamping disk 7. At this time, it is necessary to grind the surface of the clamping disk 7. Since the lifting and lowering of the clamping disk 7 are synchronously controlled by the third electric telescopic rod 38, if only one group of clamping disks 7 is grinded at this time, the spacing between the clamping disks 7 on both sides will be inconsistent, affecting the clamping effect of the workpiece. Therefore, if the four groups of clamping disks 7 are not replaced at the same time, the four groups of clamping disks 7 need to be uniformly polished to the same degree so that the clamping disks 7 can continue to be used stably.

[0049] The first electric telescopic rod 15 and the third electric telescopic rod 38 are controlled to be in a retracted reset state, and the drive motor 43 is started to drive the drive disk 27 to rotate rapidly clockwise, so that the four groups of clamping disks 7 can be driven to rotate rapidly synchronously through the second worm 23, the second worm gear 22, the first worm 18 and the first worm gear 17. The second electric telescopic rod 30 is started to push out the connecting frame 31, so that the guide rod 32 pushes the guide block 33 to slide to one side of the trapezoidal block 36, and the grinding rod 12 can be extended to the position between the four groups of clamping disks 7. When the inclined surface of the triangular block 37 conflicts with the inclined surface of the trapezoidal block 36, the sliding distance of the guide block 33 to both sides can be controlled as the second electric telescopic rod 30 continues to extend, so as to achieve grinding. The precise adjustment of the position of the rod 12 also ensures that the four groups of grinding rods 12 slide the same distance on the upper and lower sides, thereby realizing synchronous and uniform grinding of the four groups of clamping plates 7. After the grinding is completed, the second electric telescopic rod 30 is pulled back to drive the grinding rod 12 to move closer to the middle and recover and reset at the same time. The grinding rod 12 can be removed for replacement, and the guide block 33 is reset with the assistance of the elastic member 42. After each grinding is completed, the machine body 1 will adjust the next telescopic distance of the third electric telescopic rod 38 according to the grinding distance, so that the next downward clamping distance is increased by twice the grinding distance on the basis of the original distance, so that stable clamping can continue to be performed, and the grinding accuracy and clamping accuracy can be more accurately controlled.

[0050] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Flange welding machine, characterized in that: include: A machine body (1), a first device box (2) being fixedly connected to the machine body (1), and a second device box (3) being slidably connected to the machine body (1) in a horizontal direction; A welding mechanism (4), the welding mechanism (4) comprising two sets of fixing boxes (5) respectively fixedly mounted on the first device box (2) and the second device box (3), the first device box (2) and the second device box (3) are respectively connected with a lifting box (6) in a vertically sliding manner, the fixing box (5) and the lifting box (6) are respectively provided with a clamping plate (7), the welding mechanism (4) is used to drive the second device box (3) and the lifting box (6) to move, so as to realize the clamping and contact flash welding operation of the flange, the The welding mechanism (4) further comprises a guide rail (13) fixedly mounted on the machine body (1), a sliding block (14) being slidably connected in a horizontal direction in the guide rail (13), a top end of the sliding block (14) being fixedly connected to a bottom of the second device box (3), a first electric telescopic rod (15) being fixedly connected to the guide rail (13), a telescopic end of the first electric telescopic rod (15) being fixedly connected to one side of the sliding block (14), and a lifting member (16) for driving the lifting box (6) to be lifted and lowered is provided on the machine body (1); A switching mechanism (8), the switching mechanism (8) comprising four groups of threaded shafts (9) respectively rotatably connected to the lifting box (6) and the fixing box (5), the clamping plate (7) being provided with threaded grooves (10) threadably connected to the threaded shafts (9), the switching mechanism (8) being used to link the threaded shafts (9) to rotate a set angle each time the welding mechanism (4) operates, thereby completing fine adjustment of the position of the clamping plate (7); A grinding mechanism (11), the grinding mechanism (11) comprising four groups of grinding rods (12) mounted on the machine body (1), the grinding mechanism (11) being used to control the four groups of the clamping disks (7) to rotate synchronously and rapidly when the surface of the clamping disk (7) is severely worn, and to drive the four groups of the grinding rods (12) to synchronously contact the surface of the clamping disk (7) to achieve a grinding operation, the switching mechanism (8) further comprising a first worm gear (17) coaxially fixedly connected to the threaded shaft (9), the fixed box (5) and the lifting box (6) are respectively rotatably connected to first worms (18) meshing with the first worm wheel (17); the two groups of the first worms (18) located on one side of the first device box (2) are respectively coaxially fixedly connected to first sliding sleeves (19); the first worms (18) located on one side of the second device box (3) are respectively coaxially fixedly connected to first sliding rods (20) capable of slidingly connecting to the inner wall of the first sliding sleeve (19) in a horizontal direction; the second device box (3) is provided with a first worm gear (18) for driving the first worm gear (18) to move An intermittently rotating rotating member (21), the rotating member (21) comprising two groups of second worm wheels (22) coaxially fixedly mounted on one end of the first worm gears (18) close to one side of the second device box (3), the fixed box (5) and the lifting box (6) both rotatably connected with second worm gears (23) meshing with the second worm wheels (22), one group of the second worm gears (23) coaxially fixedly connected with a second sliding sleeve (24), and the other group of the second worm gears (23) coaxially fixedly connected with a second sliding sleeve (24). A second sliding rod (25) is slidably connected to the wall in a vertical direction, and a driving member (26) is provided on the sliding block (14) for driving the second worm gear (23) to intermittently rotate, and the driving member (26) includes a driving disk (27) rotatably connected to the sliding block (14), and the bottom end of the second worm gear (23) is coaxially fixedly connected to the driving disk (27), and the outer wall of the driving disk (27) is evenly rotatably connected to multiple groups of ratchet teeth (28) through a clockwork shaft, and a helical tooth block (29) is fixedly connected to the side of the guide rail (13).

2. The flange butt welding machine according to claim 1, characterized in that: The grinding mechanism (11) further comprises a second electric telescopic rod (30) fixedly mounted on the first device box (2); the telescopic end of the second electric telescopic rod (30) is fixedly connected to a connecting frame (31); two groups of guide rods (32) are fixedly connected to the connecting frame (31); two groups of guide blocks (33) are respectively slidably connected in the two groups of guide rods (32) along the vertical direction; the four groups of grinding rods (12) are respectively plugged and fixed to the four groups of guide blocks (33); the first device box (2) is provided with a control member (34) for controlling the grinding rods (12) to open and close at a set position; the sliding block (14) is fixedly connected to a driving motor (43); the output end of the driving motor (43) is coaxially fixedly connected to the bottom of the driving disk (27).

3. The flange butt welding machine according to claim 2, characterized in that: The control member (34) comprises a mounting frame (35) fixedly mounted on the first device box (2), two groups of trapezoidal blocks (36) being fixedly connected to the mounting frame (35), a triangular block (37) being fixedly connected to the guide block (33), and an inclined surface of the triangular block (37) being capable of slidingly fitting with an inclined surface of the trapezoidal block (36).

4. The flange butt welding machine according to claim 1, characterized in that: The lifting member (16) comprises a third electric telescopic rod (38) fixedly mounted on the machine body (1); the telescopic end of the third electric telescopic rod (38) is fixedly connected to a guide frame (39); and the top end of the lifting box (6) is fixedly connected to a driving block (40) that is slidably connected to the guide frame (39) in a horizontal direction.

5. The flange butt welding machine according to claim 2, characterized in that: The upper and lower ends of the guide rod (32) are respectively fixedly connected to fixed blocks (41), and the guide block (33) is fixedly connected to an elastic member (42) fixedly connected to an adjacent fixed block (41).

6. A welding process of a flange butt welding machine according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Place the two sets of flange workpieces to be welded on the clamping plates (7) on the fixed boxes (5) on both sides respectively, start the welding mechanism (4), drive the lifting box (6) to move downward, so that the clamping plates (7) on the upper and lower sides are close to each other to complete the clamping of the workpieces, then push the second device box (3) toward the first device box (2), so that the welding points of the workpieces on both sides are in contact with each other, and then energize the clamping plates (7) on both sides to complete the flash welding operation. After the welding is completed, control the second device box (3) to slide in the opposite direction and reset, and the lifting box (6) moves up and resets; S2. When the second device box (3) completes a reciprocating sliding operation, the switching mechanism (8) will be linked to drive the threaded shaft (9) to rotate a set angle, thereby completing the switching of the clamping point of the clamping plate (7) to avoid repeated wear of the same position during each clamping; S3. When the surface of the clamping disk (7) is severely worn, the grinding mechanism (11) controls the four groups of clamping disks (7) to rotate rapidly and synchronously, and at the same time drives the four groups of grinding rods (12) to synchronously contact the surface of the clamping disk (7) to achieve the grinding operation, and the grinding thickness remains consistent and the thickness is controllable, so that the clamping disk (7) after grinding can still perform synchronous and stable clamping and welding operations.

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