Stable welding device for metal pipe fittings

Abstract

The utility model provides a stable welding device for metal pipe fittings, which relates to the technical field of pipe fitting welding and comprises a welding table, two-way lead screws are rotatably connected to the inner walls of the two sides of the welding table through bearings, worm wheels are fixedly sleeved outside the two-way lead screws, and threaded blocks which are symmetrically distributed are in threaded connection with the outside of the two-way lead screws. A first servo motor is fixedly installed on the inner bottom wall of the welding table, a worm is fixedly installed on an output shaft of the first servo motor through a coupler, the outer surface of the worm is meshed with the tooth surface of a worm gear, and metal pipe fittings of different sizes can be stably clamped through the center clamping mechanism and fixed in the middle; the universality and the application range of the device are improved, it is guaranteed that the circle center position of the pipe fitting is stable in the welding process, the situation that the distance of a welding head needs to be adjusted frequently due to the fact that the circle center deviates is avoided, and therefore tedious operation steps are reduced, the working intensity of operators is reduced, and the welding quality and efficiency are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipe fitting welding technical field especially relates to a metal pipe fitting stable welding device. BACKGROUND

[0002] Welding is also called fusion welding, it is a kind of manufacturing process and technology that metal or other thermoplastic materials such as plastic are joined by heating, high temperature or high pressure, and pressure is usually needed to join the welding parts during this process, in addition to using in the factory, welding can also be carried out in various environments, such as field, underwater, etc., the corresponding welding device is often used by the operator during the production process of metal pipe fitting, so as to carry out welding operation on the metal pipe fitting, but the existing welding device has basic welding function in the actual use, but the general welding device can only clamp and weld the pipe fitting of fixed size, cannot be applied to pipe fittings of different sizes, reduces the application range of the welding device, and brings inconvenience to the welding operation of the operator.

[0003] For example, a metal pipe fitting forming welding device (publication number: CN221891308U) is disclosed in Chinese patent documents, this patent can clamp and fix pipe fittings of different sizes through the fixed frame, clamping block, concave block, threaded rod and vertical groove, the operator places the pipe fitting to be welded into the fixed frame, then rotates the rotating block, which makes the threaded rod rotate and pushes the clamping block to vertically descend along the vertical groove, finally the clamping block and the concave block cooperate to clamp and fix the pipe fitting, achieving the purpose of clamping and fixing pipe fittings of different sizes, improving the application range of the welding device and facilitating the welding operation of the operator.

[0004] However, when clamping and fixing metal pipe fittings of different diameters, the center of the pipe fitting often deviates from the center of the large gear, in this case, when the large gear rotates during welding, the welding head is driven to rotate along the metal pipe fitting by the air cylinder.

[0005] However, due to the deviation of the center of the pipe fitting from the center of the large gear, the welding head needs to be frequently adjusted in distance by the air cylinder during rotation to adapt to the position change of the pipe fitting, which not only is relatively cumbersome, but also greatly reduces the welding efficiency of the metal pipe fitting, and frequent adjustment of the distance not only increases the complexity of the operation, but also may cause instability of welding, affecting the welding quality. UTILITY MODEL CONTENTS

[0006] The utility model aims at solving the shortcomings in the prior art, at present, when welding and fixing metal pipe fittings, the distance of the welding head needs to be frequently adjusted, which reduces the pipe welding efficiency, and the cumbersome operation also easily reduces the welding quality.

[0007] In order to achieve the above object, the utility model adopts the following technical scheme:

[0008] A metal pipe fitting stable welding device, including the welding platform, the both sides inner wall of welding platform is rotationally connected with the two-way screw rod through the bearing, the outside fixed sleeve of two-way screw rod is connected with the worm, the outside screw thread of two-way screw rod is connected with the screw block of symmetry distribution, the inner bottom wall of welding platform is fixedly installed with first servo motor, the output shaft of first servo motor is fixedly installed with the worm through the shaft coupling, the outer surface of worm is engaged with the tooth surface of worm,

[0009] The upper end of welding platform is equipped with the moving groove of symmetry distribution, the inner wall of moving groove is connected with the moving block of sliding, the lower end of moving block is fixedly connected with the upper end of screw block;

[0010] The upper end of moving block is provided with center clamping mechanism, the center clamping mechanism includes moving table, the upper end of moving table is fixedly connected with the support block of symmetry distribution, the upper end of two support blocks is fixedly connected with fixed tube, the outside of fixed tube is rotatably connected with annular rotating block through bearing, the side of annular rotating block is equipped with the inclined slot of annular array distribution, the outside of annular rotating block is fixedly connected with arc external gear ring.

[0011] Preferably, the upper end of the moving table is fixedly installed with a first servo electric cylinder, one end of the piston rod of the first servo electric cylinder is fixedly connected with a pressure connecting block, one side of the pressure connecting block is fixedly connected with a drive rack.

[0012] Preferably, the tooth surface of the drive rack is engaged with the tooth surface of the arc external gear ring, the outside of the fixed tube is equipped with the movable hole of annular array distribution, the inner wall of the movable hole is movably sleeved with a telescopic block, the lower end of the telescopic block is fixedly connected with an arc clamping block.

[0013] Preferably, the outer side of the arc clamping block is fixedly connected with a contraction spring, one end of the contraction spring is fixedly connected with the inner wall of the fixed tube, one side of the telescopic block is fixedly connected with a drive rod.

[0014] Preferably, one end of the drive rod is slidably inserted into the inner wall of the inclined slot, the upper end of the welding platform is fixedly connected with a fixed block, the inner wall of the fixed block is rotatably connected with a rotating ring through a bearing.

[0015] Preferably, one side of the outer side of the rotating ring is fixedly sleeved with an annular external gear ring, the inner wall of the rotating ring is fixedly connected with a fixed base, the upper end of the fixed base is fixedly installed with a second servo electric cylinder.

[0016] Preferably, one end of the second servo motor cylinder piston rod is provided with a welding head, the upper end of the fixed block is fixedly installed with a second servo motor, the output shaft of the second servo motor is fixedly installed with a rotating shaft through a shaft coupling, the outer end of the rotating shaft is fixedly sleeved with a spur gear, and the tooth surface of the spur gear is meshed with the tooth surface of the annular external gear ring.

[0017] Compared with the prior art, the utility model has the advantages that:

[0018] In the utility model, the central clamping mechanism can stably clamp metal pipe fittings of different sizes and centrally fix the metal pipe fittings, improves the versatility and application range of the device, ensures the stability of the center position of the pipe fitting during welding, avoids the frequent adjustment of the distance of the welding head due to the center deviation, reduces the complicated operation steps, reduces the working strength of the operator, and improves the welding quality and efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A main body structure schematic view of the metal pipe fitting stable welding device is provided in the utility model.

[0020] Figure 2 A welding table structure perspective view of the metal pipe fitting stable welding device is provided in the utility model.

[0021] Figure 3 A moving table structure perspective view of the metal pipe fitting stable welding device is provided in the utility model.

[0022] Figure 4 An explosion view of the fixed pipe structure of the metal pipe fitting stable welding device is provided in the utility model.

[0023] Figure 5 A fixed block structure perspective view of the metal pipe fitting stable welding device is provided in the utility model.

[0024] Legend: 1, welding table; 2, bidirectional screw rod; 3, worm gear; 4, threaded block; 5, first servo motor; 6, worm; 7, moving groove; 8, moving block; 9, moving table; 91, supporting block; 92, fixed pipe; 93, annular rotating block; 94, inclined groove; 95, arc-shaped external gear ring; 96, first servo motor cylinder; 97, pressure connecting block; 98, driving rack; 99, movable hole; 910, telescopic block; 911, arc-shaped clamping block; 912, contraction spring; 913, driving rod; 914, fixed block; 915, rotating ring; 916, annular external gear ring; 917, fixed base; 918, second servo motor cylinder; 919, welding head; 920, second servo motor; 921, rotating shaft; 922, spur gear. DETAILED DESCRIPTION

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0026] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] Example

[0030] like Figures 1-5 As shown, this utility model provides a technical solution: a stable welding device for metal pipe fittings, including a welding table 1. Both sides of the inner wall of the welding table 1 are rotatably connected to a bidirectional lead screw 2 via bearings. A worm gear 3 is fixedly sleeved on the outside of the bidirectional lead screw 2. At the fixed sleeve joint between the bidirectional lead screw 2 and the worm gear 3, an interference fit or key connection is used to ensure the firmness and reliability of the connection.

[0031] The external thread of the bidirectional lead screw 2 is connected to symmetrically distributed threaded blocks 4. The internal threads of the threaded blocks 4 match the threads of the bidirectional lead screw 2 to ensure the meshing accuracy and transmission efficiency of the threads. The inner bottom wall of the welding table 1 is fixedly installed with a first servo motor 5. The output shaft of the first servo motor 5 is fixedly installed with a worm gear 6 through a coupling. The outer surface of the worm gear 6 meshes with the tooth surface of the worm wheel 3. The helical tooth profile of the worm gear 6 is precisely designed and machined to ensure the meshing accuracy with the worm wheel 3.

[0032] The upper end of the welding table 1 is provided with a moving groove 7 arranged symmetrically, the inner wall of the moving groove 7 is slidably connected with a moving block 8, the lower end of the moving block 8 is fixedly connected with the upper end of the threaded block 4, and the inner wall of the moving groove 7 is finely processed to ensure the surface flatness and smoothness, so as to reduce the friction and wear of the moving block 8.

[0033] The upper end of the moving block 8 is provided with a center clamping mechanism, which comprises a moving table 9, the lower end of the moving table 9 is provided with a sliding rail, so as to ensure the stable movement of the moving table 9, the upper end of the moving table 9 is fixedly connected with a support block 91 arranged symmetrically, the upper end of each of the two support blocks 91 is fixedly connected with a fixed pipe 92, the outer part of the fixed pipe 92 is rotatably connected with an annular rotating block 93 through a bearing, the annular rotating block 93 is provided with a plurality of inclined grooves 94 arranged in an annular array on one side, and the inclination angle and depth of the inclined grooves 94 are accurately designed to ensure good cooperation with the driving rod 913.

[0034] The outer part of the annular rotating block 93 is fixedly connected with an arc-shaped outer gear ring 95, the arc-shaped outer gear ring 95 is made of high-strength alloy steel, has good wear resistance and transmission efficiency, and the tooth shape of the arc-shaped outer gear ring 95 is accurately designed and processed to ensure the meshing accuracy with the driving rack 98.

[0035] The upper end of the moving table 9 is fixedly installed with a first servo electric cylinder 96, one end of the piston rod of the first servo electric cylinder 96 is fixedly connected with a pressure connecting block 97, one side of the pressure connecting block 97 is fixedly connected with a driving rack 98, and a pressure sensor arranged between the pressure connecting block 97 and the piston rod of the first servo electric cylinder 96 can monitor the pressure value of the pressure connecting block 97 in real time, so as to ensure that the clamping force of the metal pipe reaches the preset value.

[0036] The tooth surface of the driving rack 98 is meshed with the tooth surface of the arc-shaped outer gear ring 95, and the length and width of the driving rack 98 are designed according to actual requirements to meet the driving requirements of the annular rotating block 93.

[0037] The outer part of the fixed pipe 92 is provided with a plurality of movable holes 99 arranged in an annular array, the inner wall of each movable hole 99 is movably sleeved with an expansion block 910, the lower end of the expansion block 910 is fixedly connected with an arc-shaped clamping block 911, the arc-shaped clamping block 911 is made of high-strength alloy steel or rubber material, and has good clamping force and wear resistance.

[0038] The outer side of the arc-shaped clamping block 911 is fixedly connected with a contraction spring 912, the elastic coefficient and length of the contraction spring 912 are designed according to actual requirements, so that the arc-shaped clamping block 911 can be quickly and smoothly reset.

[0039] One end of the contraction spring 912 is fixedly connected with the inner wall of the fixed pipe 92, and one side of the telescopic block 910 is fixedly connected with the driving rod 913.

[0040] One end of the driving rod 913 is slidably inserted with the inner wall of the inclined groove 94, and the upper end of the welding table 1 is fixedly connected with the fixed block 914.

[0041] The outer side of one side of the rotating ring 915 is fixedly sleeved with the annular external gear ring 916, the inner wall of the rotating ring 915 is fixedly connected with the fixed base 917, the upper end of the fixed base 917 is fixedly installed with the second servo electric cylinder 918, and the teeth shape of the annular external gear ring 916 is accurately designed and processed to ensure the meshing accuracy with the spur gear 922.

[0042] The outer diameter and width of the annular external gear ring 916 are designed according to actual requirements to meet the transmission requirements of the spur gear 922.

[0043] The upper end of the fixed block 914 is fixedly installed with the second servo motor 920, the output shaft of the second servo motor 920 is fixedly installed with the rotating shaft 921 through a shaft coupling, the outer side of one end of the rotating shaft 921 is fixedly sleeved with the spur gear 922, the tooth surface of the spur gear 922 is engaged with the tooth surface of the annular external gear ring 916, the spur gear 922 is made of high-strength alloy steel and has good wear resistance and transmission efficiency, and the tooth shape of the spur gear 922 is accurately designed and processed to ensure the meshing accuracy with the annular external gear ring 916.

[0044] The working process of the utility model is as follows:

[0045] Step one, when the metal pipe is put into the fixed pipe 92, the first servo electric cylinder 96 is started, the piston rod of the first servo electric cylinder 96 pushes the pressure connecting block 97 to move, the driving rack 98 on the pressure connecting block 97 is engaged with the arc-shaped outer gear ring 95, the annular rotating block 93 is driven to rotate, the inclined slot 94 on the annular rotating block 93 cooperates with the driving rod 913 on one side of the telescopic block 910, the driving rod 913 slides in the inclined slot 94, so that the telescopic block 910 moves in the movable hole 99 of the fixed pipe 92, the telescopic block 910 drives the arc-shaped clamping block 911 to move to clamp the metal pipe, at this time the contraction spring 912 is stretched, since the pressure sensor is arranged between the pressure connecting block 97 and the first servo electric cylinder 96, when the pressure value of the pressure connecting block 97 reaches the preset value, the first servo electric cylinder 96 stops working, since the inclined slot 94 is arranged in an annular array, stable clamping of pipe fittings of different sizes can be realized;

[0046] Step two, the first servo motor 5 is started, the output shaft drives the worm 6 to rotate, the worm 6 is engaged with the worm gear 3, so that the bidirectional screw rod 2 is driven to rotate, the threaded block 4 on the bidirectional screw rod 2 moves under the action of the screw rod rotation, the threaded block 4 drives the moving block 8 to slide in the moving groove 7, thereby adjusting the distance between the two center clamping mechanisms, so that the two metal pipes relatively move and contact to wait for welding;

[0047] Step three, the second servo motor 920 is started, the output shaft drives the rotating shaft 921 to rotate through the shaft coupling, the spur gear 922 on the rotating shaft 921 is engaged with the annular outer gear ring 916 on the rotating ring 915, so that the rotating ring 915 is driven to rotate, the second servo electric cylinder 918 and the welding head 919 are installed on the fixed base 917 on the inner wall of the rotating ring 915, the rotation of the rotating ring 915 makes the welding head 919 rotate around the metal pipe to perform welding work, and the second servo electric cylinder 918 can drive the welding head 919 to move according to the diameter of the pipe.

[0048] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to the embodiments without departing from the principles and spirits of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A metal pipe fitting stable welding device comprising a welding table (1), characterized in that: Both sides of the welding table (1) are rotatably connected with a bidirectional screw rod (2) through a bearing, the outside of the bidirectional screw rod (2) is fixedly sleeved with a worm gear (3), the outside of the bidirectional screw rod (2) is threadedly connected with symmetrically distributed threaded blocks (4), the inner bottom wall of the welding table (1) is fixedly installed with a first servo motor (5), the output shaft of the first servo motor (5) is fixedly installed with a worm (6) through a shaft coupling, the outer surface of the worm (6) is meshed with the tooth surface of the worm gear (3); The upper end of the welding table (1) is provided with symmetrically distributed moving grooves (7), the inner wall of the moving groove (7) is slidably connected with a moving block (8), the lower end of the moving block (8) is fixedly connected with the upper end of the threaded block (4); The upper end of the moving block (8) is provided with a center clamping mechanism, the center clamping mechanism comprises a moving table (9), the upper end of the moving table (9) is fixedly connected with symmetrically distributed support blocks (91), the upper end of each of the two support blocks (91) is fixedly connected with a fixed tube (92), the outside of the fixed tube (92) is rotatably connected with an annular rotating block (93) through a bearing, one side of the annular rotating block (93) is provided with annularly arrayed inclined grooves (94), the outside of the annular rotating block (93) is fixedly connected with an arc-shaped outer gear ring (95).

2. A device for stabilizing the welding of a metal pipe according to claim 1, characterized in that: The upper end of the moving table (9) is fixedly installed with a first servo electric cylinder (96), one end of the piston rod of the first servo electric cylinder (96) is fixedly connected with a pressure connecting block (97), one side of the pressure connecting block (97) is fixedly connected with a driving rack (98).

3. A device for stabilizing the welding of a metal pipe according to claim 2, characterized in that: The tooth surface of the driving rack (98) is meshed with the tooth surface of the arc-shaped outer gear ring (95), the outside of the fixed tube (92) is provided with annularly arrayed movable holes (99), the inner wall of the movable hole (99) movably sleeved with a telescopic block (910), the lower end of the telescopic block (910) is fixedly connected with an arc-shaped clamping block (911).

4. A device for stabilizing the welding of a metal pipe according to claim 3, characterized in that: The outer side of the arc-shaped clamping block (911) is fixedly connected with a contraction spring (912), one end of the contraction spring (912) is fixedly connected with the inner wall of the fixed tube (92), one side of the telescopic block (910) is fixedly connected with a driving rod (913).

5. A device for stabilizing the welding of a metal pipe according to claim 4, characterized in that: One end of the driving rod (913) is slidably inserted into the inner wall of the inclined groove (94), the upper end of the welding table (1) is fixedly connected with a fixed block (914), the inner wall of the fixed block (914) is rotatably connected with a rotating ring (915) through a bearing.

6. A device for stabilizing the welding of a metal pipe according to claim 5, characterized in that: One side of the rotating ring (915) is fixedly sleeved with an annular outer gear ring (916), the inner wall of the rotating ring (915) is fixedly connected with a fixed base (917), the upper end of the fixed base (917) is fixedly installed with a second servo electric cylinder (918).

7. A device for stabilizing the welding of a metal pipe according to claim 6, characterized in that: One end of the second servo motor (920) is fixedly installed on the upper end of the fixed block (914), the output shaft of the second servo motor (920) is fixedly installed with a rotating shaft (921) through a shaft coupling, the outer end of the rotating shaft (921) is fixedly sleeved with a spur gear (922), and the tooth surface of the spur gear (922) is in meshing connection with the tooth surface of the annular outer gear ring (916).

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