A welding device for pipe fittings

Abstract

The present invention relates to the technical field of pipe welding, and specifically to a pipe welding device, comprising: a welding machine, a conveying device, a pipe, a groove opened at one end of the pipe, a fixing mechanism for fixing the pipe, and a processing mechanism for grinding the pipe; the fixing mechanism comprises a rotating assembly for driving the pipe to rotate, a clamping assembly for clamping the pipe; and a cylinder for pushing the processing mechanism to move. In the present invention, when the cylinder output shaft extends outward, it drives the push rod and the grinding assembly to contact the groove, and then the cylinder output shaft continues to extend, so that the push rod slides inside the spring groove through the slider and squeezes the reset spring 1. At this time, the cleaning assembly contacts the groove and cleans the groove after grinding. The use effect is good, and the grinding and cleaning work of the pipe is completed at the same time. It can also identify the larger weld nodules on the weld after welding is completed, so as to remind the staff in time.

Description

Technical Field

[0001] The invention relates to the technical field of pipe fitting welding, and in particular to a pipe fitting welding device. Background Art

[0002] Stainless steel pipes are widely used in industrial production and life, such as the transmission of fluids such as water, oil, and gas. In order to make stainless steel pipes more versatile, safe and reliable in application, they need to be welded.

[0003] In order to ensure the quality of welding, a groove will be opened at the end of the stainless steel pipe. The groove of the stainless steel pipe has different forms according to the different uses of the stainless steel pipe. It is generally divided into U-type, V-type and Y-type grooves. When using stainless steel pipes under high temperature conditions, U-type grooves can be used to reduce the impact of thermal stress on the weld.

[0004] The invention with application number CN202310532879.3 relates to the technical field of pipe processing, specifically a pipe welding device with groove pretreatment function, including a welding lower support, both ends of the upper side surface of the welding lower support are connected with alignment ring sleeves through a support seat, each alignment ring sleeve is distributed with a locking ring sleeve on one side close to the middle of the welding lower support, and a rotating part is provided on the outer ring surface of the two locking ring sleeves and on one end close to each other, a working top plate is installed between the two rotating parts, and a grinding part is installed on the lower side of the working top plate; the present invention can coaxially and stably lock two pipe fittings to be welded, increase the alignment accuracy of the two pipe fittings to be welded, the present invention can rotate with the pipe fitting as a reference, and simultaneously grind the blunt edges and grooves of the two pipe fittings through the grinding part, thereby ensuring that the two pipe fittings to be welded are at the same grinding degree, and the present invention is suitable for pipe fittings with different blunt edge distances and different groove angles, thereby solving the technical problems existing in the prior art.

[0005] It can be seen from this application that the existing problems in welding pipe fittings are as follows: the stainless steel pipe groove is polished based on manual experience, and then fixed to the welding device for welding, and then the weld is polished after welding. First of all, the grinding methods for grooves of different shapes are different. It is more difficult to control the grinding amount through manual experience judgment and operation, and it is impossible to guarantee the grinding degree of the grooves of the two groups of stainless steel pipe fittings. Moreover, the process is complicated and the efficiency is low. When grinding the weld nodules, welding slag, and weld spatter at the weld, it is necessary to make manual judgment again, and the steps are cumbersome.

[0006] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Summary of the invention

[0007] The object of the present invention is to provide a pipe welding device which can effectively solve the above technical problems.

[0008] In order to achieve the purpose of the present invention, the following technical scheme is adopted:

[0009] A pipe welding device, comprising: a welding machine, a conveying device, a pipe, a groove formed at one end of the pipe, a fixing mechanism for fixing the pipe, and a processing mechanism for grinding the pipe; the fixing mechanism comprises a rotating assembly for driving the pipe to rotate, a clamping assembly for clamping the pipe; and a cylinder for pushing the processing mechanism to move;

[0010] The processing mechanism includes a push rod, a baffle, a grinding component for grinding the groove, and a cleaning component for cleaning the groove;

[0011] The cleaning assembly comprises a connecting rod 1 rotatably connected to the cylinder, a connecting rod 2 rotatably mounted on the connecting rod 1, a cleaning sheet rotatably mounted on the connecting rod 2, a rotating shaft 2 penetrating the connecting rod 1, and a rotating shaft 3 penetrating the connecting rod 2; the rotating shaft 2 and the rotating shaft 3 are both rotatably connected to the surface of the baffle;

[0012] The grinding assembly includes a positioning groove provided on the pushing rod, a second return spring fixedly connected to the positioning groove, a grinding sheet fixedly connected to one end of the second return spring, and a rotating shaft rotatably mounted on the grinding sheet; the rotating shaft 1 is mounted on the surface of the pushing rod;

[0013] The rotating assembly includes a driving motor, a gear fixedly connected to one end of the driving motor, an outer rotating sleeve meshing on the surface of the gear, and an inner rotating sleeve fixedly connected to the outer rotating sleeve;

[0014] The clamping assembly includes a cushion block detachably mounted on the inner rotating sleeve, an arc-shaped protrusion fixedly mounted on the inner rotating sleeve, a connecting block slidably connected to the arc-shaped protrusion, a limiting groove provided on the connecting block, an extrusion rod fixedly connected to the connecting block, and a clamping block fixedly connected to one end of the extrusion rod;

[0015] It also includes: a fixed sleeve fixedly mounted on the inner rotating sleeve, a limit block fixedly mounted on the extrusion rod, and a tension spring fixedly mounted on the limit block; the other end of the tension spring is fixedly connected to the surface of the fixed sleeve.

[0016] Furthermore, the polishing sheet is divided into three layers: a hard layer, a polishing layer, and a flexible layer.

[0017] Furthermore, a micro switch is also provided on the propulsion rod.

[0018] Furthermore, two groups of cleaning components are arranged on the cylinder, and the heights of the two groups of cleaning components are different.

[0019] Furthermore, the processing mechanism also includes a telescopic component arranged on the cylinder.

[0020] Furthermore, the telescopic assembly includes a spring groove opened on the cylinder, a return spring 1 fixedly installed on the spring groove, and a slider fixedly connected to the return spring 1; a push rod is fixedly connected to one side surface of the slider.

[0021] Furthermore, the present invention includes the following method:

[0022] S1. The pipe is docked using the conveying device and moved toward the welding machine;

[0023] S2. The pipe after docking is fixed by the fixing mechanism, and the pipe is driven to rotate;

[0024] S3. When the pipe is rotating, the cylinder pushes the push rod to move, so that the grinding sheet opens and contacts the groove for grinding. After the grinding is completed, the welding machine welds the pipe.

[0025] S4. After the pipe is welded, the cleaning assembly is used to grind and clean the weld at the groove.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention provides a welding device for pipe fittings. When the cylinder output shaft extends outward, it drives the push rod and the grinding component to contact the groove. Then the cylinder output shaft continues to extend, so that the push rod slides inside the spring groove through the slider and squeezes the reset spring. At this time, the cleaning component contacts the groove and cleans the groove after grinding. The use effect is good, and the grinding and cleaning work of the pipe fitting is completed at the same time. Moreover, the larger weld nodules on the weld after welding can be identified so as to remind the staff in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0029] Figure 1 It is a structural schematic diagram of a pipe welding device of the present invention;

[0030] Figure 2 A welding device for a pipe fitting according to the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0031] Figure 3 It is a cross-sectional structural schematic diagram of a rotating assembly of a pipe welding device of the present invention;

[0032] Figure 4 It is a schematic cross-sectional structure diagram of a clamping assembly of a pipe welding device of the present invention;

[0033] Figure 5 A schematic diagram of the cylinder structure of a pipe welding device of the present invention;

[0034] Figure 6 A welding device for a pipe fitting according to the present invention Figure 5 The enlarged structural diagram at B in the middle;

[0035] Figure 7 It is a schematic cross-sectional structure diagram of a telescopic assembly of a pipe welding device of the present invention;

[0036] Figure 8 It is a schematic cross-sectional structure diagram of a grinding assembly of a pipe welding device of the present invention;

[0037] Fig. 9 It is a schematic diagram of the state of a first embodiment of a welding device for a pipe fitting of the present invention;

[0038] Fig.10 A schematic diagram of a second embodiment of a pipe welding device according to the present invention;

[0039] Fig.11 This is a schematic diagram of the state of a third embodiment of a pipe welding device of the present invention.

[0040] In the figure: 1, welding machine; 2, conveying device; 3, pipe fitting; 31, groove; 4, fixing mechanism; 41, rotating assembly; 411, driving motor; 412, gear; 413, outer rotating sleeve; 414, inner rotating sleeve; 42, clamping assembly; 421, cushion block; 422, arc-shaped protrusion; 423, connecting block; 424, limiting groove; 425, extrusion rod; 426, fixing sleeve; 427, limiting block; 428, tension spring; 429 , clamping block; 5, cylinder; 6, handling mechanism; 61, telescopic assembly; 611, spring slot; 612, reset spring one; 613, slider; 62, push rod; 63, grinding assembly; 631, positioning slot; 632, reset spring two; 633, grinding sheet; 634, rotating shaft one; 64, baffle; 65, cleaning assembly; 651, connecting rod one; 652, connecting rod two; 653, cleaning sheet; 654, rotating shaft two; 655, rotating shaft three. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments.

[0042] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. When a mechanism is referred to as being "fixed to" another mechanism, it may be directly on the other mechanism or there may also be a centered mechanism. When a mechanism is considered to be "connected to" another mechanism, it may be directly connected to the other mechanism or there may be a centered mechanism at the same time. When a mechanism is considered to be "set on" another mechanism, it may be directly set on the other mechanism or there may be a centered mechanism at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0043] like Figures 1 to 11 As shown, the present invention is a welding device for pipe fittings.

[0044] The present invention discloses a pipe welding device, comprising: a welding machine 1, a conveying device 2, and a pipe 3. The conveying device 2 is provided with two groups on the left and right sides of the welding machine 1. Two groups of pipes 3 are transported from the two groups of conveying devices 2 to the welding position of the welding machine 1, and the pipes 3 are welded. A groove 31 is provided at one end of the pipe 3. The opening form of the groove 31 depends on the purpose and material of the pipe 3. The groove 31 can enhance the strength of the weld after the two groups of pipes 3 are welded. A fixing mechanism 4 is provided to fix the pipe 3. The pipe 3 is welded at the welding position. During the connection process, the two groups of pipe fittings 3 need to be fixed to ensure the stability of the pipe fittings 3 during welding. At the same time, the pipe fittings 3 need to be driven to rotate at a uniform speed to ensure the quality of welding between the pipe fittings 3. The processing mechanism 6 for grinding the pipe fittings 3 can grind and clean the welding parts on the surfaces of the pipe fittings 3 to ensure that there are no foreign objects at the upper slope 31 of the pipe fittings 3 that affect the stability and strength of the pipe fittings 3 after welding; the cylinder 5 that pushes the processing mechanism 6 to move drives the processing mechanism 6 to move through the cylinder 5 so as to process the pipe fittings 3.

[0045] The processing mechanism 6 includes a push rod 62, a baffle 64, a grinding assembly 63 supported by the push rod 62, a grinding assembly 63 for grinding the groove 31, and a cleaning assembly 65 for cleaning the groove 31; the cleaning assembly 65 cleans the residue left by the grinding assembly 63.

[0046] During the welding process of the pipe fitting 3, the shape of the groove 31 of the pipe fitting 3 and the foreign matter remaining on the surface will affect the quality of the pipe fitting 3 after welding, and will reduce the welding quality of the welding part. These impurities may produce defects such as pores and cracks during the welding process, resulting in reduced strength and sealing of the weld, and may also cause safety hazards such as stress concentration and embrittlement in the welded joint. These hidden dangers may cause accidents such as leakage and fracture during the operation of the equipment, affecting the normal operation and safety of the equipment. After the welding of the pipe fitting 3 is completed, due to unexpected situations during welding, weld nodules may appear on the weld, which will lead to reduced appearance quality, reduced joint strength, and stress concentration leading to fractures at the connection of the pipe fitting.

[0047] The grinding assembly 63 includes a positioning groove 631 opened on the push rod 62, and a positioning for the installation of the second reset spring 632. The second reset spring 632 is installed inside the positioning groove 631, which can reduce the area of ​​the second reset spring 632 exposed to the air, thereby reducing the possibility of damage to the second reset spring 632. The second reset spring 632 is fixedly connected to the positioning groove 631, a grinding sheet 633 is fixedly connected to one end of the second reset spring 632, and a rotating shaft 634 is rotatably installed on the grinding sheet 633; ​​after the grinding sheet 633 rotates through the rotating shaft 634, it drives the second reset spring 632 to expand and contract and deform, and under the reaction force after the deformation, the grinding sheet 633 is pulled to reset, and the rotating shaft 634 is installed on the surface of the push rod 62.

[0048] During use, the push rod 62 is pulled upward so that during the transportation of the pipe 3, one end of the pipe 3 squeezes the grinding sheet 633 and rotates through the rotating shaft 1 634, so that the grinding sheet 633 is close to the surface of the groove 31 of the pipe 3, and under the reaction force of the reset spring 2 632, the grinding sheet 633 can be driven to reset.

[0049] Here, since the grinding sheet 633 is divided into three layers, the bottom surface is a hard layer connected to the reset spring 2 632 and the rotating shaft 1 634. The hard layer is a connecting layer and has a certain flexibility. The grinding layer contacts the groove 31 and grinds the groove 31. The grinding layer can be made of grinding paper, sandpaper and other materials. A flexible layer is arranged between the hard layer and the grinding layer. Due to the arrangement of the flexible layer, the grinding sheet 633 is affected by the shape of the groove 31 after rotating through the rotating shaft 1 634, and can be completely attached to the groove 31 to complete the grinding of different grooves 31.

[0050] After welding is completed, the cylinder 5 drives the push rod 62 to move, so that the grinding sheet 633 is close to the weld, and the pipe 3 rotates at the same time, and the grinding sheet 633 grinds the weld. On the one hand, the groove 31 is grinded and cleaned by the grinding sheet 633 to improve the welding quality of the pipe 3. On the other hand, the weld after welding is completed is grinded to improve the flatness of the weld, eliminate residues on the weld, avoid stress concentration, and reduce the welding quality of the pipe 3.

[0051] like Fig. 9 As shown, in this embodiment, a micro switch is also provided on the push rod 62. When the grinding assembly 63 is grinding the weld, a larger weld nodule will squeeze the grinding sheet 633 to trigger the micro switch, thereby notifying the staff to promptly check whether the weld nodule will affect the normal use of the pipe fitting 3.

[0052] When the pipe fittings 3 are transported through the conveying device 2, the two groups of pipe fittings 3 are transported forward through the conveying device 2 at different times, resulting in the pipe fittings 3 being dislocated at the docking position, exceeding the welding range of the welding machine 1, making it impossible to weld. Furthermore, after the pipe fittings 3 are docked, the coaxiality of the two pipe fittings 3 needs to be ensured. If the coaxiality is different, the welding of the pipe fittings 3 will fail.

[0053] The cylinder 5 is arranged at a vertical position with respect to the interface of the pipe fitting 3, and will not interfere with the welding of the pipe fitting 3 by the welding machine 1. At the same time, when the pipe fitting 3 is butt-jointed, the cylinder 5 can position the butt-jointed position of the pipe fitting 3. For example, the cylinder 5 drives the push rod 62 upward, and the pipe fitting 3 is conveyed forward by the conveying device 2 and stops after contacting the push rod 62, so that both pipe fittings 3 contact the push rod 62. Then the cylinder 5 retracts, and then controls the conveying device 2 to convey forward synchronously, so that the two groups of pipe fittings 3 are butt-jointed. At this time, the cylinder 5 drives the push rod 62 to support one end of the two pipe fittings 3 upward to ensure the coaxiality of the butt-jointed pipe fittings 3. When the pipe fittings 3 are butt-jointed, the coaxiality is a key parameter, which reflects the mutual alignment of the axes of the two pipe fittings to be butt-jointed in space, that is, whether they are on the same axis. When the coaxiality error is large, the butt-jointed positions of the pipe fittings 3 are greatly different. At this time, there is a greater probability of failure in welding, and the connection strength of the two pipe fittings 3 will also be insufficient.

[0054] Therefore, by changing the way the push rod 62 is used, the pipe 3 can be polished on the one hand, and the pipe 3 can be coaxially docked on the other hand, and the consistency of the docking position of the pipe 3 can be ensured, thereby ensuring the strength and stability of the pipe 3 after welding.

[0055] The cylinder 5 pushes the push rod 62 to drive the grinding assembly 63 to move up to the groove 31 of the pipe fitting 3, so that the grinding assembly 63 contacts the groove 31 and grinds the groove 31. At the same time, after the cleaning assembly 65 contacts the groove 31, friction is generated with the groove 31, which can clean foreign matter and debris adhered to the groove 31 of the pipe fitting 3, thereby ensuring that there is no foreign matter on the surface of the groove 31, avoiding affecting the welding quality of the pipe fitting 3.

[0056] The processing mechanism 6 also includes a telescopic component 61 and a baffle 64 arranged on the cylinder. The baffle 64 protects the cleaning component 65 to prevent foreign objects from hitting the cleaning component 65, causing the cleaning component 65 to be damaged and unusable. After the cylinder 5 pushes the push rod 62 to move, the grinding component 63 contacts the groove 31, and then the telescopic component 61 can continue to push upward, thereby moving the cleaning component 65 to the surface of the groove 31 to clean the groove 31.

[0057] The cleaning assembly 65 includes a connecting rod 1 651 rotatably connected to the cylinder, a connecting rod 2 652 rotatably installed on the connecting rod 1 651, and a cleaning sheet 653 rotatably installed on the connecting rod 2 652. The cleaning sheet 653 is installed on the connecting rod 2 652, and the cleaning sheet 653 can be replaced according to manual selection. For example, a grinding sheet 633 with different mesh sizes is replaced to assist the grinding assembly 63 in grinding the groove 31 and the weld. Another group of cleaning assemblies 65 replaces the cleaning sheet 653 for cleaning, thereby obtaining a better processing effect. A rotating shaft 2 654 passes through the connecting rod 1 651, and a rotating shaft 3 655 passes through the connecting rod 2 652; the rotating shaft 2 654 and the rotating shaft 3 655 are both rotatably connected to the surface of the baffle 64. The baffle 64 can both support the rotating shaft 2 654 and the rotating shaft 3 655, and protect the cleaning assembly 65 to prevent the cleaning assembly 65 from being damaged by the impact of foreign objects.

[0058] When the cylinder of the cylinder 5 extends outward, it pushes the connecting rod 1 651 to rotate through the rotating shaft 2 654, and drives the connecting rod 2 652 to rotate through the rotating shaft 3 655, and finally pushes the cleaning sheet 653 to move to the groove 31, and when the pipe fitting 3 rotates, the cleaning sheet 653 cleans the groove 31. The cleaning components 65 are provided in two groups on the cylinder, and the heights of the two groups of cleaning components 65 are different. The two groups of cleaning components 65 have different heights, which can make the cleaning sheet 653 contact the groove 31 after the cylinder of the cylinder 5 moves different distances, and clean to ensure the cleanliness of the surface of the groove 31 before welding. At the same time, after welding, the weld can also be cleaned, so that the staff can observe the weld more directly to confirm the welding quality of the pipe fitting 3.

[0059] The telescopic assembly 61 includes a spring groove 611 opened on the cylinder, a return spring 612 fixedly installed on the spring groove 611, and a slider 613 fixedly connected to the return spring 612; a push rod 62 is fixedly connected to a side surface of the slider 613, and the push rod 62 slides inside the spring groove 611 through the slider 613.

[0060] When the cylinder 5 extends outward, it drives the push rod 62 and the grinding assembly 63 to contact the groove 31, and then the cylinder 5 continues to extend, so that the push rod 62 slides inside the spring groove 611 through the slider 613 and squeezes the reset spring 612. At this time, the cleaning assembly 65 contacts the groove 31 and cleans the groove 31 after grinding. The use effect is good, and the grinding and cleaning work of the pipe fitting 3 is completed at the same time, and the larger weld nodules on the weld after welding are identified, so as to remind the staff in time.

[0061] The fixing mechanism 4 includes a rotating component 41 for driving the pipe 3 to rotate and a clamping component 42 for clamping the pipe 3. The rotating component 41 drives the clamping component 42 to clamp the pipe 3 during rotation, and can drive the pipe 3 to rotate, so that the pipe 3 rotates stably and at a uniform speed during welding, thereby ensuring the welding quality of the pipe 3 by the welding machine 1.

[0062] The rotating assembly 41 includes a driving motor 411, a gear 412 fixedly connected to one end of the driving motor 411, an outer rotating sleeve 413 meshing with the surface of the gear 412, the outer surface of the outer rotating sleeve 413 is provided with gear teeth meshing with the gear 412, and an inner rotating sleeve 414 fixedly connected to the outer rotating sleeve 413; the driving motor 411 is fixedly installed on a fixing frame; the outer rotating sleeve 413 is rotatably installed on the fixing frame.

[0063] The driving motor 411 drives the gear 412 to rotate, and the outer rotating sleeve 413 is driven to rotate through the meshing of the gear 412 and the outer rotating sleeve 413, and the card slot is rotated at the same time. When the inner wall surface of one end of the card slot contacts the card block, the inner rotating sleeve 414 can be driven to rotate through the card block.

[0064] The clamping assembly 42 includes a cushion block 421 detachably mounted on the inner rotating sleeve 414, a groove formed on the cushion block 421 that fits the pipe fitting 3 and can support the pipe fitting 3, an arc-shaped protrusion 422 fixedly mounted on the inner rotating sleeve 414, a connecting block 423 slidably connected to the arc-shaped protrusion 422, and a limiting groove 424 formed on the connecting block 423. When the outer rotating sleeve 413 rotates, the arc-shaped protrusion 422 moves and drives the connecting block 423 to move through the limiting groove 424, and the extrusion rod 42 fixedly connected to the connecting block 423 5. A fixed sleeve 426 fixedly mounted on the inner rotating sleeve 414, a limit block 427 fixedly mounted on the extrusion rod 425, and a connecting block 423 are moved and slide inside the fixed sleeve 426 through the extrusion rod 425 and the limit block 427. A clamping block 429 fixedly connected to one end of the extrusion rod 425 and a tension spring 428 fixedly mounted on the limit block 427; the other end of the tension spring 428 is fixedly connected to the surface of the fixed sleeve 426. During the sliding process of the limit block 427, the tension spring 428 will be squeezed to reset the clamping block 429.

[0065] The clamping block 429 is provided with two groups, as shown in the attached Figure 3 The clamp block 429 shown in the figure has two shapes, namely, an arc-shaped clamp block 429 for contacting the arc surface and a T-shaped clamp block 429 for contacting the flat surface. The clamp block 429 and the extrusion rod 425 are detachably connected to each other, and can be used for square pipe fittings 3, round pipe fittings 3 or as shown in the attached figure according to the usage scenario. Figure 2 The special-shaped pipe fittings 3 shown can all be stably fixed to ensure the welding effect of the pipe fittings 3 .

[0066] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0067] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A welding device for pipe fittings, characterized in that: include: A welding machine, a conveying device, a pipe fitting, a groove formed at one end of the pipe fitting, a fixing mechanism for fixing the pipe fitting, and a processing mechanism for grinding the pipe fitting; the fixing mechanism includes a rotating assembly for driving the pipe fitting to rotate, a clamping assembly for clamping the pipe fitting; and a cylinder for pushing the processing mechanism to move; The processing mechanism includes a push rod, a baffle, a grinding component for grinding the groove, and a cleaning component for cleaning the groove; The cleaning assembly comprises a connecting rod 1 rotatably connected to the cylinder, a connecting rod 2 rotatably mounted on the connecting rod 1, a cleaning sheet rotatably mounted on the connecting rod 2, a rotating shaft 2 penetrating the connecting rod 1, and a rotating shaft 3 penetrating the connecting rod 2; the rotating shaft 2 and the rotating shaft 3 are both rotatably connected to the surface of the baffle; The grinding assembly includes a positioning groove provided on the pushing rod, a second return spring fixedly connected to the positioning groove, a grinding sheet fixedly connected to one end of the second return spring, and a rotating shaft rotatably mounted on the grinding sheet; the rotating shaft 1 is mounted on the surface of the pushing rod; The rotating assembly includes a driving motor, a gear fixedly connected to one end of the driving motor, an outer rotating sleeve meshing on the surface of the gear, and an inner rotating sleeve fixedly connected to the outer rotating sleeve; The clamping assembly includes a cushion block detachably mounted on the inner rotating sleeve, an arc-shaped protrusion fixedly mounted on the inner rotating sleeve, a connecting block slidably connected to the arc-shaped protrusion, a limiting groove provided on the connecting block, an extrusion rod fixedly connected to the connecting block, and a clamping block fixedly connected to one end of the extrusion rod; It also includes: a fixed sleeve fixedly mounted on the inner rotating sleeve, a limit block fixedly mounted on the extrusion rod, and a tension spring fixedly mounted on the limit block; The other end of the tension spring is fixedly connected to the surface of the fixing sleeve.

2. A pipe welding device as claimed in claim 1, characterized in that: The grinding sheet is divided into three layers: a hard layer, a grinding layer, and a flexible layer.

3. A pipe welding device as claimed in claim 1, characterized in that: The propulsion rod is also provided with a micro switch.

4. A pipe welding device as claimed in claim 1, characterized in that: The cleaning components are arranged in two groups on the cylinder, and the heights of the two groups of cleaning components are different.

5. A pipe welding device as claimed in claim 1, characterized in that: The processing mechanism also includes a telescopic component arranged on the cylinder.

6. A pipe welding device as claimed in claim 5, characterized in that: The telescopic assembly includes a spring groove opened on the cylinder, a return spring 1 fixedly installed on the spring groove, and a sliding block fixedly connected to the return spring 1; a push rod is fixedly connected to one side surface of the sliding block.

7. A welding method using the pipe welding device according to claim 1, characterized in that: The steps include: S1. The pipe is docked using the conveying device and moved toward the welding machine; S2. The pipe after docking is fixed by the fixing mechanism, and the pipe is driven to rotate; S3. When the pipe rotates, the cylinder pushes the push rod to move, so that the grinding sheet opens and contacts the groove to grind. After the grinding is completed, the welding machine welds the pipe; S4. After the pipe is welded, the cleaning assembly is used to grind and clean the weld at the groove.

Images