Metal part welding equipment and process thereof

Abstract

The invention relates to the technical field of welding, and discloses metal part welding equipment and a technology thereof.The metal part welding equipment comprises two symmetrically-arranged discs, the two discs are each rotationally provided with a limiting mechanism, and each limiting mechanism comprises a rotating ring rotationally connected with the corresponding disc; a plurality of supporting rods arranged in the circumferential direction are slidably connected to the gear ring in an inserted mode, the ends of the supporting rods are fixedly connected with the rotating ring, and the supporting rods are sleeved with second tension springs with one ends fixedly connected with the supporting rods and the other ends fixedly connected with the gear ring; the clamping blocks define a clamping area allowing the metal piece to be inserted therein. In the preparation work before welding of two metal pieces, after the driving number is reduced, fitting work and limiting work of two pipe fittings can still be achieved, and meanwhile the situation that the fitting procedure and the limiting procedure of the two pipe fittings are carried out separately can be avoided, so that time is saved.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to a metal piece welding device and a process thereof. Background Art

[0002] Welding technology is mainly used on metal base materials. Commonly used methods include arc welding, argon arc welding, laser welding, electroslag pressure welding, etc. Arc welding and argon arc welding are more widely used. Argon arc welding is a welding technology based on the principle of ordinary arc welding. It uses argon gas to protect metal welding materials. High current is used to melt the welding materials into liquid on the base material to form a molten pool, so that the metal to be welded and the welding materials can achieve metallurgical bonding. The principle is that the welding wire is continuously transported to the conductive nozzle through the wire feeding mechanism to conduct electricity, and an arc is generated between the base material and the welding wire, so that the welding wire and the base material are melted, and the inert gas argon is used to protect the arc and the molten metal for welding.

[0003] For welding between two pipe fittings, it is usually necessary to first move the two pipe fittings onto a welding bracket, and then push the two pipe fittings through a special adjustment mechanism to make the opposite surfaces of the two pipe fittings fit together to present a weld. Then, it is necessary to limit the two pipe fittings through a limiting mechanism to prevent outward force from being generated between the two pipe fittings during welding, so as to make the welding more stable. Then, adjust the distance between the conductive nozzle and the weld, and finally drive the two pipe fittings to rotate through a driving mechanism for automatic welding.

[0004] For example, the invention patent with application number CN202411102355.1, publication (announcement) number CN118635772B, and name “An automatic welding machine” discloses that “two pipe fittings are placed on the front and rear sides of the outer wall of the driving roller respectively, so that the driving rollers on both sides complete the support for the pipe fittings, and then the user can control the adjustment motor to start, so that the adjustment motor can realize the synchronous inward movement of the sliding platforms on both sides through the rotation control of the double-headed screw, until the position of the limit wheel enters the range of the pipe fitting and stops moving, and then control the clamping cylinder so that the two clamping cylinders facing opposite directions respectively control the limit wheels on the upper and lower sides to move inward to complete the clamping process of the inner and outer walls of the lower edge of the pipe fitting, and finally control the adjustment motor so that the fitting of the limit wheel drives the pipe fittings on both sides to move inward until they fit, thus completing the fully automatic weld fitting process before pipe welding”, and then adjust the distance between the conductive nozzle and the weld to carry out welding.

[0005] In the preparation work before welding two pipe fittings, the welding machine in the above-mentioned invention patent first controls the movement of the sliding platforms on both sides by adjusting the motor so that the position of the limiting wheel enters the range of the pipe fitting, and then drives the limiting wheels on the upper and lower sides to move inward by the clamping cylinder to complete the clamping of the inner and outer walls of the lower edge of the pipe fitting, thereby achieving the limitation of the pipe fitting, and then drives the limiting wheels by adjusting the motor to push the two pipe fittings inward until they fit together to present the weld to be welded. It can be seen that the adjustment motor in the above patent is equivalent to the adjustment mechanism in the prior art, and the two clamping cylinders are equivalent to the limiting mechanism in the prior art. The operation process before welding the two pipe fittings is still similar to that in the prior art. Not only does it need to adjust the motor to realize the bonding effect on the two pipe fittings, but it also needs to realize the limiting effect on the two pipe fittings respectively through the two clamping cylinders. Not only the number of driving mechanisms has not been reduced, making it difficult to further reduce the cost, but the bonding and limiting processes of the two pipe fittings are still carried out separately, but there are changes before and after. It is precisely because the bonding process and the limiting process of the two pipe fittings are operated separately that not only each process needs to consume the time required for its corresponding operation, but also a time difference is generated between the two processes, which further increases the time consumption, thereby greatly increasing the total time required for the preparation work before welding, making the work efficiency low. It can be seen that how to reduce the number of drivers in the preparation work before welding the two pipe fittings, while still being able to realize the bonding and limiting work of the two pipe fittings, and at the same time avoiding the bonding process and the limiting process of the two pipe fittings being carried out separately to save time is a technical problem that needs to be solved urgently. Summary of the invention

[0006] The object of the present invention is to provide a metal welding device and a process thereof to solve the above-mentioned deficiencies in the prior art.

[0007] In order to achieve the above object, the present invention provides the following technical solution: a metal welding device, comprising two symmetrically arranged discs, each of which is rotatably mounted with a limiting mechanism, the limiting mechanism comprising: a rotating ring, which is rotatably connected to the disc; A gear ring, on which a plurality of support rods arranged circumferentially are slidably inserted, the ends of the plurality of support rods are fixedly connected to the rotating ring, and a second tension spring is sleeved on the support rod, one end of which is fixedly connected to the support rod and the other end of which is fixedly connected to the gear ring; A plurality of clamping blocks, which enclose a clamping area for inserting a metal part, wherein the plurality of clamping blocks are located in the inner circle of the gear ring and are equidistantly arranged around the axis of the gear ring in the circumferential direction, and the clamping blocks are elastically slidably connected to the gear ring along the radial direction of the gear ring; A pressure ring, which is located in the inner circle of the gear ring and is coaxial with the gear ring, and the plurality of clamping blocks are located in the inner circle of the pressure ring, and the pressure ring is in sliding contact with the outer inclined surfaces of the plurality of clamping blocks; A driving member, which is mounted on the disc and is rotatably connected to the pressure ring, and is used to drive the pressure ring to move axially; The two metal parts are inserted into the two clamping areas one by one. The driving part drives the two pressure rings to slide toward each other so that the pressure ring squeezes multiple clamping blocks to slide toward the metal parts and then clamps the metal parts to a limited position. In the process, the pressure ring pushes the gear ring and multiple clamping blocks to slide elastically along the support rod so that the two metal parts located in the clamping area move toward each other until the end faces are in contact.

[0008] In the above-mentioned metal parts welding equipment, a plurality of groups of epitaxial plates corresponding to a plurality of clamping blocks are fixedly mounted on the gear ring, two telescopic rods are fixedly connected between each group of the epitaxial plates and the corresponding clamping blocks, the gear ring is located between the two telescopic rods, a first tension spring is sleeved on the telescopic rods, one end of the first tension spring is fixedly connected to the epitaxial plate, and the other end is fixedly connected to the clamping block.

[0009] In the above-mentioned metal welding equipment, two clearance holes are provided on the outer inclined surface of the clamping block, which are plugged into the two telescopic rods one by one. The bottom ends of the two telescopic rods are fixedly connected to the bottom surfaces of the clearance holes. Based on the setting of the clearance holes, the lengths of the two telescopic rods are the same, and the lengths of the two first tension springs are also the same to make the force on the clamping block more balanced.

[0010] In the above-mentioned metal welding equipment, an extrusion block is fixedly installed on the inner circumferential surface of the pressure ring, which is in sliding contact with the outer inclined surfaces of the multiple clamping blocks in a one-to-one corresponding manner. When the two pressure rings move toward each other, the extrusion block is driven to slide along the outer inclined surface of the clamping block. Based on the inclination of the outer inclined surface of the clamping block, the extrusion block squeezes the clamping block toward the metal part. When the clamping block moves, it pulls the first tension spring to produce elastic deformation. When the two pressure rings move in opposite directions, the corresponding clamping blocks are driven to move toward the outside of the metal part under the action of the elastic force of the first tension spring.

[0011] The above-mentioned metal parts welding equipment, the driving part includes a driving motor fixedly connected to the disc, the power output end of the driving motor is connected to a screw, the outer side of the screw is threaded with a push-pull column, two symmetrically arranged fixing ears are fixedly installed on the push-pull column, and two limit rods slidably plugged in one-to-one correspondence with the two fixing ears are fixedly installed on the disc, the limit rods are used to limit the rotation of the push-pull column, the end of the push-pull column is rotatably connected with a joint, and the joint is fixedly connected to the pressure ring through a plurality of L-shaped plates arranged circumferentially, and the screw is driven to rotate by starting the driving motor, and the rotation of the screw drives the push-pull column to move axially, and then drives the pressure ring to move axially.

[0012] In the above-mentioned metal welding equipment, a threaded hole is opened in the center of the end face of the joint, a threaded rod is screwed in the threaded hole, an end plate is fixedly installed at the end of the threaded rod, the end plate corresponds to the clamping area, and the end face of the metal part is abutted and matched with the end face of the end plate.

[0013] In the above-mentioned metal welding equipment, the threaded rod has a variety of specifications with different lengths, which are used to adapt to metal parts of different lengths, so that the welds of metal parts of different lengths are always located at specific positions during welding.

[0014] The above-mentioned metal welding equipment also includes a conductive nozzle and a reduction motor. The conductive nozzle is located between the two limiting mechanisms and on one side of the weld. The power output end of the reduction motor is connected to a roller. The roller includes two meshing teeth that mesh with two gear rings in a one-to-one correspondence. The reduction motor drives the roller to rotate so that the two meshing teeth drive the two gear rings to rotate synchronously in a one-to-one correspondence, thereby driving the two metal parts with their end faces in contact to rotate so that the conductive nozzle welds the weld.

[0015] The above-mentioned metal welding equipment also includes a fixedly installed vertical pole, on which a knocking ball is installed through an elastic member, the knocking ball is located on one side of the weld and opposite to the conductive nozzle, an arc rod is fixedly installed on the knocking ball, and a hook plate that abuts against the arc rod is fixedly installed on the rotating roller. During the rotation of the rotating roller, the hook plate is driven to intermittently abut against the arc rod and pull the arc rod and the knocking ball to move to the side away from the weld, and after the hook plate is separated from the arc rod, the elastic force of the elastic member drives the knocking ball to knock on the welding slag on the weld to separate the welding slag.

[0016] A metal parts welding process, based on the above metal parts welding equipment, comprises the following steps: S1: Welding parts placement: insert the two metal parts to be welded into the clamping areas of the two limiting mechanisms one by one; S2: Fitting and limiting the two welding parts: start the two driving parts at the same time, so that the driving parts drive the two pressure rings to move toward each other, and the movement of the pressure ring achieves two functions: first, push the gear ring and the multiple clamping blocks to slide elastically along the support rod so that the two metal parts located in the clamping area move toward each other until the end faces fit together; second, squeeze the multiple clamping blocks to slide elastically toward the metal parts until the metal parts are clamped and limited; S3: Adjust the position of the conductive nozzle: adjust the front and rear position of the conductive nozzle so that the distance between the conductive nozzle and the weld is within the required range. Since the axial centerline position of metal parts of different diameters remains unchanged when they are clamped and limited by the clamping block, it is only necessary to adjust the front and rear position when adjusting the position of the conductive nozzle, eliminating the need for up, down, left, and right adjustments, making the adjustment of the conductive nozzle faster; and the threaded rod has a variety of specifications with different lengths, which are used to adapt to metal parts of different lengths, so that the welds of metal parts of different lengths are always located at a specific position during welding. Therefore, the position of the conductive nozzle does not need to be adjusted when welding metal parts of different lengths, that is, the operation of adjusting the conductive nozzle is omitted when welding metal parts of different lengths; S4: Welding: Start the reduction motor to drive the roller to rotate so that the two meshing teeth drive the two gear rings to rotate synchronously in a one-to-one manner, and then drive the two metal parts with their end faces touching each other to rotate so that the conductive nozzle can weld the weld. Since the metal parts rotate, the distance between the conductive nozzle and the rotating metal parts remains unchanged, so that the conductive nozzle can achieve continuous welding for metal parts with different diameters.

[0017] Beneficial effects: 1. In the above technical scheme, the present invention can realize the process of clamping and limiting the metal parts and the process of fitting the end faces of the two metal parts at the same time by creatively designing the limiting mechanism and using the driving member to drive the corresponding pressure ring to move. The two processes can use the same set of driving mechanisms, and there is no need to drive and implement different driving mechanisms as in the prior art, thereby eliminating a set of driving mechanisms, and both processes are implemented by limiting mechanisms, without the need for other mechanisms, thereby reducing the design of the structure, and both of these conveniences reduce the cost of the equipment; furthermore, the clamping and limiting process of the metal parts and the fitting process of the end faces of the two metal parts are carried out simultaneously, rather than separately in the prior art, so that the two processes do not need to consume time separately, and the time difference between the two processes is also eliminated, thereby greatly reducing the time required for the preparation of the metal parts before welding. It can be seen that the present invention can still achieve the fitting and limiting work of the two pipes by reducing the number of drivers in the preparation work before welding of the two metal parts, and at the same time can avoid the fitting and limiting processes of the two pipes being carried out separately to save time, which can effectively solve the shortcomings of the prior art; 2. The present invention configures a plurality of threaded rods of different lengths for the push-pull column, so that when welding metal parts of different lengths, not only can the end faces of the two metal parts be fitted together, but also the lengths of the ends of the two metal parts protruding from the outside of the clamping block can be the same when the two metal parts of different lengths are inserted into the corresponding clamping area and abut against the end plate, thereby making the left and right positions of the welds unchanged, so that there is no need to adjust the left and right positions of the conductive nozzles during welding, thereby reducing the number of steps for adjusting the conductive nozzles; at the same time, in the present invention, the port of the conductive nozzle is aligned with the axis of the metal part, and since the plurality of clamping blocks clamp the metal part along the radial direction of the gear ring, for metal parts of different diameters, when the plurality of clamping blocks clamp the metal part, the axis position of the metal part remains unchanged, which makes it easier to adjust the position of the conductive nozzle, and only the position of the conductive nozzle needs to be adjusted forward and backward, and no adjustment is required up and down, thereby further reducing the number of steps for adjusting the conductive nozzle; 3. In the present invention, the limiting mechanism not only clamps and limits the metal parts to prevent relative movement of the two metal parts during the rotation welding process, but also can realize the automatic fitting of the end faces of the two metal parts, and can also realize the support of the metal parts. It can be seen that the limiting mechanism plays multiple roles, thereby saving the structure in the equipment and making the manufacturing cost of the equipment lower; 4. In the present invention, a striking ball connected to an elastic part is provided on one side of the weld, an arc rod is fixedly installed on the striking ball, and a hook plate abutting against the arc rod is fixedly installed on the roller. In the process of the reduction motor driving the roller to rotate to drive the metal part to rotate and weld, the hook plate can also be driven to drive the striking ball to hit the welding slag on the weld, so that the welding slag automatically falls off, which solves the technical problem that the newly melted welding wire will directly cover the welding slag, thereby reducing the strength of the welding. At the same time, it also saves the operator from the operation of separately cleaning and collecting the welding slag after the welding is completed. It can be seen that the process of the reduction motor driving the roller to rotate has an unexpected technical effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A schematic structural diagram of a metal piece welding device provided by an embodiment of the present invention when the metal piece is not installed in a clamping area; Figure 2 The embodiment of the present invention provides Figure 1 A schematic diagram of the enlarged structure of part A; Figure 3 The embodiment of the present invention provides Figure 1 A schematic diagram of the enlarged structure of part B in FIG. Figure 4 A schematic structural diagram of a metal component welding device when two metal component end surfaces are bonded together according to an embodiment of the present invention; Figure 5 The embodiment of the present invention provides Figure 4 Schematic diagram of the enlarged structure of part C; Figure 6 The embodiment of the present invention provides Figure 4 Schematic diagram of the enlarged structure of the D part; Figure 7 A schematic diagram of the disassembled structure of a metal welding device provided in an embodiment of the present invention; Figure 8 A schematic diagram of the structure of the roller, the hook plate, the vertical rod, the elastic member and the elastic member provided in an embodiment of the present invention; Fig. 9 A schematic diagram of the disassembly of the disc, the outer limiting ring and the inner limiting ring provided in an embodiment of the present invention; Fig.10 A schematic diagram of the structure of two metal parts provided in an embodiment of the present invention when they are clamped by two limiting mechanisms; Fig.11 The embodiment of the present invention provides Fig.10 Schematic diagram of the enlarged structure of part E in FIG. Fig.12 The embodiment of the present invention provides Fig.10 Schematic diagram of the splitting; Fig.13 A schematic diagram of the structure of a driving member, a pressure ring and a plurality of clamping blocks provided in an embodiment of the present invention; Fig.14 A schematic cross-sectional structure diagram of a push-pull column and a joint provided in an embodiment of the present invention.

[0020] Description of reference numerals: 1. Support frame; 101. Support plate; 102. Pier seat; 103. Guide rail; 104. Cross plate; 2. Gear ring; 201. Extension plate; 3. First tension spring; 4. Telescopic rod; 5. Clamp; 501. Clearance hole; 6. Pressure ring; 601. Extrusion block; 602. L-shaped plate; 7. Second tension spring; 8. Support rod; 801. Fixed plate; 9. Roller; 901. Meshing teeth; 10. Coupling; 11. Reducer motor; 12. Vertical pole; 13. Knocking ball; 14. Elastic member; 15. Arc rod; 16. Hook plate; 17 , connecting plate; 1701, clamp; 18, conductive nozzle; 19, electric cylinder; 20, vertical frame; 21, driving motor; 22, screw; 23, push-pull column; 2301, end plate; 2302, threaded rod; 2303, fixing ear; 2304, joint; 23041, threaded hole; 24, rotating ring; 25, disc; 2501, outer limit ring; 2502, inner limit ring; 2503, concave hole; 2504, annular groove; 26, metal parts; 27, limit rod; 28, sphere; 29, ball; 30, collection box. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0022] The words related to directions and positions in the present invention are relative to the drawings. The "metal member" involved in the present invention is a cylindrical tube.

[0023] First embodiment: like Figure 1-14 As shown, a metal welding device provided by an embodiment of the present invention includes two symmetrically arranged discs 25, and a limiting mechanism is rotatably mounted on each of the two discs 25. The limiting mechanism includes: a rotating ring 24, which is rotatably connected to the disc 25; A gear ring 2, on which a plurality of support rods 8 arranged circumferentially are slidably inserted, the ends of the plurality of support rods 8 are fixedly connected to the rotating ring 24, and a second tension spring 7 is sleeved on the support rod 8, one end of which is fixedly connected to the support rod 8 and the other end of which is fixedly connected to the gear ring 2; A plurality of clamping blocks 5, which enclose a clamping area for inserting the metal member 26, the plurality of clamping blocks 5 are located in the inner circle of the gear ring 2 and are equidistantly arranged around the axis of the gear ring 2, and the clamping blocks 5 are elastically slidably connected to the gear ring 2 along the radial direction of the gear ring 2; A pressure ring 6 is located in the inner circle of the gear ring 2 and is coaxial with the gear ring 2. A plurality of clamping blocks 5 are located in the inner circle of the pressure ring 6. The pressure ring 6 is in sliding contact with the outer inclined surfaces of the plurality of clamping blocks 5. A driving member, which is mounted on the disc 25 and is rotatably connected to the pressure ring 6, and is used to drive the pressure ring 6 to move axially; The two metal parts 26 are inserted into the two clamping areas one by one. The driving part drives the two pressure rings 6 to slide toward each other so that the pressure rings 6 squeeze the multiple clamping blocks 5 to slide toward the metal parts 26 and then clamp the metal parts 26 to limit the position. During this process, the pressure ring 6 pushes the gear ring 2 and the multiple clamping blocks 5 to slide elastically along the support rod 8 so that the two metal parts 26 located in the clamping area move toward each other until the end faces are in contact.

[0024] The metal welding equipment provided in this embodiment is used for welding metal parts, and can achieve efficient welding for metal parts 26 with different diameters or lengths. Specifically, two symmetrically arranged discs 25 are fixedly installed on two support frames 1 in a one-to-one correspondence, and the two support frames 1 are fixedly connected. A vertical frame 20 is fixedly installed on the support frame 1, and an electric cylinder 19 is fixedly installed on the vertical frame 20. The electric cylinder 19 can also be replaced by a cylinder. A connecting plate 17 is fixedly installed on the power output end of the electric cylinder 19, and a conductive nozzle 18 is detachably installed on one end of the connecting plate 17 through a clamp 1701. The conductive nozzle 18 can be controlled to move up and down by the electric cylinder 19. At the same time, based on the clamping of the conductive nozzle 18 by the clamp 1701, the position of the conductive nozzle 18 can be adjusted forward and backward when the clamp 1701 is loosened. In the present invention, based on the special structural design, there is no need to adjust the conductive nozzle 18 in the left and right directions, thereby reducing the cumbersome steps of adjusting the conductive nozzle 18, which will be described in detail below. Two limiting mechanisms are rotatably mounted on two disks 25 in a one-to-one manner, and the two limiting mechanisms are symmetrically arranged. The two limiting mechanisms correspond to the two metal parts 26 in a one-to-one manner, and the limiting mechanisms have multiple functions, such as supporting the metal parts 26, clamping and limiting the metal parts 26, and forming a weld by fitting the metal parts 26. The limiting mechanism includes a rotating ring 24 rotatably connected to the disk 25, and the rotating ring 24 rotates. Specifically, an annular groove 2504 adapted to the rotating ring 24 is provided on the disk 25, and the rotating ring 24 is rotatably embedded in the annular groove 2504. An outer limiting ring 2501 and an inner limiting ring 2502 are fixedly mounted on the disk 25 by screws, and the outer limiting ring 2501 abuts against the outer part of the side of the rotating ring 24, and the inner limiting ring 2502 abuts against the inner part of the side of the rotating ring 24 so that the rotating ring 24 will not be separated from the annular groove 2504, thereby limiting the rotating ring 24.

[0025] The limiting mechanism also includes a plurality of support rods 8, the ends of which are fixedly connected to the rotating ring 24 and are equidistantly arranged around the axis of the gear ring 2. The number of support rods 8 is preferably three, so that the support rods 8 can provide stable support for the gear ring 2 without hindering the placement of the metal part 26 in the clamping area. The plurality of support rods 8 are slidably plugged into the gear ring 2 so that the gear ring 2 can move axially along the support rods 8, and a second tension spring 7 is installed between the gear ring 2 and the support rods 8. A fixed disk 801 is integrally provided on the support rod 8, one end of the second tension spring 7 is fixedly connected to the fixed disk 801 on the support rod 8, and the other end is fixedly connected to the side of the gear ring 2. When the gear ring 2 moves, the second tension spring 7 is driven to produce elastic deformation. The function of the second tension spring 7 is to provide sliding resistance to the gear ring 2 while realizing the resetting of the gear ring 2.

[0026] The limiting mechanism also includes a plurality of clamping blocks 5, which are located in the inner circle of the gear ring 2 and are equidistantly arranged around the axial center line of the gear ring 2. The number of the clamping blocks 5 is preferably three. The plurality of clamping blocks 5 together form a clamping area for inserting the metal part 26, which is used to clamp the metal part 26. The clamping blocks 5 are elastically slidably connected to the gear ring 2 along the radial direction of the gear ring 2, so that the plurality of clamping blocks 5 can move back and forth in the direction pointing to the center of the gear ring 2, so that when the plurality of clamping blocks 5 move toward the metal part 26 and clamp the metal part 26, the metal part 26 is coaxial with the gear ring 2. Even if the diameters of the metal part 26 are different, the metal part 26 can be coaxial with the gear ring 2 when the plurality of clamping blocks 5 clamp the metal part 26. In the initial state, the minimum inscribed circle diameter of the clamping area is larger than the diameter of the metal piece 26, so that the metal piece 26 can be smoothly inserted into the clamping area, and the maximum spacing between the multiple clamping blocks 5 is smaller than the diameter of the metal piece 26, so that when the metal piece 26 is placed in the clamping area, the clamping blocks 5 can support the metal piece 26, so that the metal piece 26 will not be separated from the clamping area. The role of the elastic sliding of the clamping block 5 is to increase the sliding resistance of the clamping block 5 under the action of elastic force, and at the same time, to achieve the reset of the clamping block 5.

[0027] The limiting mechanism also includes a pressure ring 6, which is located in the inner circle of the gear ring 2 and is coaxial with the gear ring 2. Multiple clamping blocks 5 are located in the inner circle of the pressure ring 6. The pressure ring 6 slides and abuts against the outer inclined surfaces of the multiple clamping blocks 5. The inner side of the clamping block 5 is used to abut against the outer side surface of the metal part 26 to clamp the metal part 26. The outer inclined surface of the clamping block 5 has an inclination, which is used to slide and abut against the pressure ring 6. When the pressure ring 6 moves, it can simultaneously squeeze the multiple clamping blocks 5 toward the center direction of the metal part 26 under the inclination of the outer inclined surface of the clamping block 5, so that the multiple clamping blocks 5 clamp the metal part 26, and the movement of the pressure ring 6 can also push the multiple clamping blocks 5 to move together with the gear ring 2, so that the two metal parts 26 move toward each other so that their ends fit together.

[0028] The limiting mechanism also includes a driving member, which is used to drive the pressure ring 6 to move axially back and forth.

[0029] Its working principle is: the two metal parts 26 to be welded are successively passed through the gap between the two adjacent support rods 8 and then inserted into the corresponding clamping area. At this time, the clamping block 5 supports the metal part 26. Then, the two driving members are started at the same time, so that the driving members drive the two pressure rings 6 to move toward each other. The movement of the pressure ring 6 pushes the gear ring 2 and multiple clamping blocks 5 to slide elastically along the support rod 8 to continuously stretch the second tension spring 7, while squeezing multiple clamping blocks 5 to slide elastically toward the center of the metal part 26. When multiple clamping blocks 5 move along the support rod 8, they drive the corresponding metal parts 26 to follow the movement, so that the two metal parts 26 are continuously approached. So that the end faces of the two metal parts 26 are fitted together, thereby forming a weld that needs to be welded, and the multiple clamping blocks 5 elastically slide toward the center of the metal part 26 so that the multiple clamping blocks 5 are constantly close to the metal part 26 so that the multiple clamping blocks 5 clamp the metal part 26 to limit the position. When the metal part 26 is clamped and limited, the end faces of the two metal parts 26 are also fitted together. The two processes are carried out simultaneously instead of separately, thereby eliminating the time difference between the two processes and avoiding the situation where the two processes consume time separately. In addition, the two processes are realized through the same structure and the same driving member, which reduces the number of driving mechanisms in the prior art and effectively saves costs.

[0030] It can be seen that in the present invention, through the creative design of the limiting mechanism, the process of clamping and limiting the metal part 26 and the process of fitting the end faces of the two metal parts 26 can be simultaneously realized by using a driving member to drive the corresponding pressure ring 6 to move. The two processes can use the same set of driving mechanisms, and there is no need to use different driving mechanisms to drive and implement them as in the prior art, thereby eliminating a set of driving mechanisms. Moreover, both processes are implemented through the limiting mechanism, without the need for other mechanisms, thereby reducing the structural design. Both of these conveniences reduce the cost of the equipment. Furthermore, the clamping and limiting process of the metal part 26 and the end face fitting process of the two metal parts 26 are carried out simultaneously, instead of being carried out separately as in the prior art, so that the two processes do not need to consume time separately, and the time difference between the two processes is also eliminated, thereby greatly reducing the time required for the preparation work of the metal part 26 before welding. It can be seen that the present invention can achieve the fitting and limiting work of the two pipes by reducing the number of drives during the preparation work before welding the two metal parts 26, and at the same time avoid the separation of the fitting and limiting processes of the two pipes to save time, which can effectively solve the shortcomings of the prior art.

[0031] In this embodiment, multiple groups of extension plates 201 corresponding to multiple clamping blocks 5 are fixedly installed on the gear ring 2, and two telescopic rods 4 are fixedly connected between each group of extension plates 201 and the corresponding clamping blocks 5. The gear ring 2 is located between the two telescopic rods 4, and a first tension spring 3 is sleeved on the telescopic rod 4. One end of the first tension spring 3 is fixedly connected to the extension plate 201, and the other end is fixedly connected to the clamping block 5. Specifically, there are two extension plates 201 in each group of extension plates 201, and they are fixedly installed on the left and right sides of the gear ring 2 in a one-to-one correspondence. The telescopicity of the telescopic rod 4 can provide a moving space for the clamping block 5, and at the same time, the moving direction of the clamping block 5 can be limited, so that the clamping block 5 can only move along the radial direction of the gear ring 2. The elastic force of the first tension spring 3 can realize the elastic movement of the clamping block 5, and the first tension spring 3 is always in a stretched state.

[0032] Among them, the outer side surface of the clamp block 5 is an inclined surface, which is used to abut against the pressure ring 6, and the inner side surface of the clamp block 5 is an arc-shaped surface, which is used to abut against the outer peripheral surface of the metal part 26 to clamp the metal part 26. Two clearance holes 501 that are plugged into the two telescopic rods 4 one by one are opened on the outer inclined surface of the clamp block 5. The bottom ends of the two telescopic rods 4 and the bottom end of the first tension spring 3 are fixedly connected to the bottom surface of the clearance hole 501. Based on the setting of the clearance hole 501, the lengths of the two telescopic rods 4 are the same, and the lengths of the two first tension springs 3 are also the same to make the force on the clamp block 5 more balanced.

[0033] In this embodiment, an extrusion block 601 is fixedly installed on the inner circumferential surface of the pressure ring 6, which is in sliding contact with the outer inclined surfaces of the multiple clamping blocks 5 in a one-to-one corresponding manner. When the two pressure rings 6 move toward each other, the extrusion block 601 is driven to slide along the outer inclined surface of the clamping block 5. Based on the inclination of the outer inclined surface of the clamping block 5, the extrusion block 601 squeezes the clamping block 5 to move toward the metal part 26 to clamp the metal part 26 to limit the position. When the clamping block 5 moves, it pulls the first tension spring 3 to produce elastic deformation. When the two pressure rings 6 move in opposite directions, the corresponding clamping block 5 is driven to move toward the outside of the metal part 26 under the action of the elastic force of the first tension spring 3 to release the clamping of the metal part 26, thereby facilitating the removal of the welded metal part 26.

[0034] When removing the welded metal part 26, the driving part drives the two pressure rings 6 to move away from each other, thereby pulling the multiple clamping blocks 5 away from the metal part 26 under the elastic force of the first tension spring 3, so that the clamping area is opened, thereby releasing the clamping of the metal part 26, and at the same time, the two toothed rings 2 are pulled away from each other under the elastic force of the second tension spring 7. The movement of the toothed rings 2 drives the multiple clamping blocks 5 to move synchronously until the vertical distance between the clamping blocks 5 in the two limiting mechanisms is close to equal to the length of the welded metal part 26, then the operation of the driving part is stopped, and finally the metal part 26 is removed from the clamping blocks 5.

[0035] The vertical distance between the clamping blocks 5 in the two limiting mechanisms is close to the length of the welded metal part 26, which can be understood as when the axial length of the abutment portion between the end of the metal part 26 and the clamping block 5 supporting its bottom is less than 1 cm, the metal part 26 will not detach from the clamping area, and there is space for the metal part 26 to move after the clamping area is opened, so that the clamping block 5 will not hinder the removal of the metal part 26.

[0036] In this embodiment, the driving member includes a driving motor 21 fixedly connected to the disc 25, and a screw rod 22 is connected to the power output end of the driving motor 21. A push-pull column 23 is screwed on the outer side of the screw rod 22, and two symmetrically arranged fixing ears 2303 are fixedly installed on the push-pull column 23. Two limit rods 27 that are slidably plugged in one-to-one correspondence with the two fixing ears 2303 are fixedly installed on the disc 25. The limit rods 27 are used to limit the rotation of the push-pull column 23. The end of the push-pull column 23 is rotatably connected to a joint 2304, and the joint 2304 is fixedly connected to the pressure ring 6 through a plurality of circumferentially arranged L-shaped plates 602. The driving motor 21 is started to rotate to drive the screw rod 22 to rotate, and the rotation of the screw rod 22 drives the push-pull column 23 to move axially, and then drives the pressure ring 6 to move axially. The center of the disk 25 is provided with a recessed hole 2503, and the driving motor 21 is fixedly installed in the recessed hole 2503. The driving motor 21 can rotate in the positive direction, and when rotating in the positive direction, the two pressure rings 6 are driven to move toward each other, and when rotating in the reverse direction, the two pressure rings 6 are driven to move away from each other. The rotational connection between the push-pull column 23 and the joint 2304 ensures that when the pressure ring 6 rotates, its rotational force will not be transmitted to the push-pull column 23, so that the push-pull column 23 will not hinder the rotation of the pressure ring 6, and at the same time, the push-pull column 23 can pull and push the pressure ring 6 to move back and forth. The opposite ends of the push-pull column 23 and the joint 2304 are rotatably embedded with a ball 28, and the two balls 28 are integrally connected by a connecting rod. The end surface of the push-pull column 23 is also rollingly embedded with a plurality of balls 29 circumferentially arranged around the axial center line of the push-pull column 23. The balls 29 protrude from the push-pull column 23 and abut against the end surface of the joint 2304 to reduce the friction between the push-pull column 23 and the joint 2304.

[0037] Furthermore, a threaded hole 23041 is provided at the center of the end face of the joint 2304, a threaded rod 2302 is threaded in the threaded hole 23041, an end plate 2301 is fixedly installed at the end of the threaded rod 2302, the end plate 2301 corresponds to the clamping area, and the end face of the metal part 26 is abutted against the end face of the end plate 2301. Specifically, when the metal part 26 is inserted into the corresponding clamping area, the end face of the metal part 26 may or may not abut against the end plate 2301. In the non-abutting state, when the two limiting mechanisms push the two metal parts 26 to move toward each other and the end faces fit together, the two metal parts 26 exert force on each other to make the two metal parts 26 slide toward the direction of the corresponding end plate 2301 respectively so that the end face of the metal part 26 abuts against the corresponding end plate 2301. After that, when the two limiting mechanisms continue to move toward each other, the two metal parts 26 always maintain a state of end face fitting. At the same time, under the extrusion of the two pressure rings 6, the clamping block 5 is driven to continue to move toward the metal part 26 to clamp and limit the metal part 26.

[0038] Furthermore, the threaded rod 2302 has a plurality of specifications with different lengths, and is used to adapt to metal parts 26 of different lengths, so that the weld seams of the metal parts 26 of different lengths are always located at specific positions during welding. Specifically, when welding two metal parts 26, the lengths of the metal parts 26 have different specifications, and when the metal parts 26 are inserted into the clamping area and abut against the end plate 2301, the end of the metal part 26 should protrude from the clamping block 5 by a certain length. If the length of the metal part 26 is shorter, the end of the metal part 26 cannot protrude from the outside of the clamping block 5 when the metal part 26 is inserted into the clamping area and abuts against the end plate 2301, thereby making it impossible to achieve end surface fitting of the two metal parts 26. For this reason, in the present invention, by configuring a plurality of threaded rods 2302 of different lengths, threaded rods 2302 corresponding to their lengths can be selected when welding metal parts 26 of different lengths, so that when metal parts 26 of different lengths are inserted into the clamping area and abut against the end plate 2301, the end of the metal part 26 can all protrude from the outside of the clamping block 5 by a certain length, so that the device can also achieve fitting of metal parts 26 of different lengths. At the same time, when the two metal parts 26 to be welded are of different lengths, the left and right (left and right refer to the axial direction of the gear ring 2) position of the weld formed by the end faces of the two metal parts 26 will change direction, so it is necessary to adjust the left and right position of the conductive tip 18, resulting in an increase in the steps of adjusting the conductive tip 18. To this end, in the present invention, by configuring a plurality of threaded rods 2302 of different lengths, the ends of the two metal parts 26 protruding from the outside of the clamping block 5 can be made to have the same length when the two metal parts 26 of different lengths are inserted into the corresponding clamping area and abut against the end plate 2301, thereby making the left and right position of the weld unchanged, so that there is no need to adjust the left and right position of the conductive tip 18 during welding, thereby reducing the steps of adjusting the conductive tip 18.

[0039] It can be seen that in the present invention, by configuring a plurality of threaded rods 2302 of different lengths for the push-pull column 23, when welding metal pieces 26 of different lengths, not only can the end faces of the two metal pieces 26 be fitted, but also the lengths of the ends of the two metal pieces 26 protruding from the outside of the clamping block 5 can be the same when the two metal pieces 26 of different lengths are inserted into the corresponding clamping area and abut against the end plate 2301, thereby making the left and right positions of the welds unchanged, so that there is no need to adjust the left and right positions of the conductive nozzle 18 during welding, thereby reducing the adjustment steps of the conductive nozzle 18. At the same time, in the present invention, the port of the conductive nozzle 18 is aligned with the axis of the metal piece 26. Since the plurality of clamping blocks 5 clamp the metal piece 26 along the radial direction of the gear ring 2, for metal pieces 26 of different diameters, when the plurality of clamping blocks 5 clamp the metal piece 26, the axis position of the metal piece 26 remains unchanged, which makes it easier to adjust the position of the conductive nozzle 18. It is only necessary to adjust the position of the conductive nozzle 18 forward and backward, and there is no need to adjust it up and down, thereby further reducing the adjustment steps of the conductive nozzle 18.

[0040] In the present invention, the limiting mechanism not only clamps and limits the metal part 26 to prevent relative movement between the two metal parts 26 during rotation welding, but also enables automatic fitting of the end faces of the two metal parts 26, and also enables support for the metal parts 26. It can be seen that the limiting mechanism plays multiple roles, thereby saving structure in the equipment and lowering the manufacturing cost of the equipment.

[0041] The present embodiment also includes a conductive nozzle 18 and a reduction motor 11. The reduction motor 11 can also be replaced by a servo motor. The conductive nozzle 18 is located between the two limit mechanisms and on one side of the weld. The power output end of the reduction motor 11 is connected to a roller 9 through a coupling 10. The coupling 10 is a prior art and will not be described in detail. The roller 9 includes two meshing teeth 901 that mesh with the two gear rings 2 in a one-to-one manner. The meshing teeth 901 and the gear rings 2 can move relative to each other in the axial direction, so that when the gear rings 2 move, the meshing teeth 901 will not block the gear rings 2. At the same time, the meshing teeth 901 have a supporting effect on 2 to prevent the support rod 8 from deforming. The reduction motor 11 drives the roller 9 to rotate so that the two meshing teeth 901 drive the two gear rings 2 to rotate synchronously in a one-to-one manner, and then drives the two metal parts 26 with the end faces in contact to rotate so that the conductive nozzle 18 welds the weld. The welding wire is continuously supplied by a conveying mechanism, and the conveying mechanism of the welding wire is a prior art and will not be described in detail. Among them, two support plates 101 arranged opposite to each other are fixedly installed on the support frame 1, and a pier 102 is fixedly installed on each of the two support plates 101. The reduction motor 11 is fixedly installed on one of the piers 102. One end of the roller 9 is connected to the power output end of the reduction motor 11, and the other end is rotationally connected to the pier 102 away from the reduction motor 11.

[0042] Furthermore, since welding wires usually include flux-cored welding wires and solid welding wires, the flux components of the flux-cored welding wires will react with metals at high temperatures to form slag, which will become welding slag after cooling; while solid welding wires have no flux components, so a large amount of slag will not be generated during the welding process. However, if there are impurities such as oil, rust, dust, etc. on the surface of the welding wire, or the current is too large, a small amount of welding slag may be generated. It can be seen that both flux-cored welding wires and solid welding wires are very easy to generate welding slag during welding. After the welding slag is generated, if it is not cleaned in time, the newly melted welding wire will directly cover the welding slag, thereby greatly reducing the strength of the welding. If the weld is only welded for one week, although the newly melted welding wire will not cover the welding slag, the operator needs to clean and collect the welding slag separately after the welding is completed, which will also increase the workload of the operator.

[0043] Based on the above technical problems, the present embodiment further includes a fixedly installed vertical pole 12, on which a knocking ball 13 is installed through an elastic member 14, the knocking ball 13 is located on one side of the weld and opposite to the conductive nozzle 18, an arc rod 15 is fixedly installed on the knocking ball 13, and a hook plate 16 that abuts against the arc rod 15 is fixedly installed on the rotating roller 9. During the rotation of the rotating roller 9, the hook plate 16 is driven to intermittently abut against the arc rod 15 and pull the arc rod 15 and the knocking ball 13 to move away from the weld. After the hook plate 16 is separated from the arc rod 15, the elastic force of the elastic member 14 drives the knocking ball 13 to knock the welding slag on the weld to separate the welding slag. Specifically, in the initial state, the knocking ball 13 does not contact the weld, but only uses the elastic force of the elastic member 14 to enable the knocking ball 13 to collide with the welding slag on the weld during the swinging process. Among them, a horizontal plate 104 is fixedly installed on the support frame 1, and the vertical rod 12 is fixedly installed on the horizontal plate 104. The vertical rod 12 is bent so that the vertical rod 12 will not contact the hook plate 16. The elastic member 14 is in a vertical state. One end of the elastic member 14 is fixedly connected to the vertical rod 12, and the other end is fixedly connected to the bottom of the knocking ball 13. The elastic member 14 supports the knocking ball 13 and the arc rod 15. The end of the hook plate 16 is hook-shaped. When the hook plate 16 abuts against the arc rod 15, the hook plate 16 abuts against the arc rod 15. A pulling force is generated away from the metal part 26. At this time, the hook plate 16 pulls the arc rod 15 and the knocking ball 13 away from the weld, and the elastic part 14 produces elastic deformation of bending. The elastic part 14 is a spring or a spring. As the hook plate 16 continues to rotate, the hook plate 16 is separated from the arc rod 15. After separation, the knocking ball 13 and the arc rod 15 are driven to swing toward the weld under the elastic force of the elastic part 14, and the knocking ball 13 can hit the weld, thereby knocking off the welding slag generated on the weld, thereby realizing automatic removal of the welding slag.

[0044] It can be seen that in the present invention, a knocking ball 13 connected to the elastic member 14 is provided on one side of the weld, an arc rod 15 is fixedly installed on the knocking ball 13, and a hook plate 16 abutting against the arc rod 15 is fixedly installed on the roller 9, so that in the process of the reduction motor 11 driving the roller 9 to rotate to drive the metal part 26 to rotate for welding, the hook plate 16 can also be driven to drive the knocking ball 13 to hit the welding slag on the weld, so that the welding slag automatically falls off, which solves the technical problem that the newly melted welding wire will directly cover the welding slag, thereby reducing the strength of the welding. At the same time, it also saves the operator from the operation of separately cleaning and collecting the welding slag after the welding is completed. It can be seen that the process of the reduction motor 11 driving the roller 9 to rotate has an unexpected technical effect.

[0045] In this embodiment, a collection box 30 for collecting welding slag is also included. The collection box 30 is located below the weld and is staggered with the hook plate 16. The knocking ball 13 knocks the welding slag so that the welding slag is separated from the weld and falls into the collection box 30 to be collected. A guide rail 103 is fixedly installed at the bottom of the two support plates 101, and the collection box 30 is slidably plugged into the two guide rails 103.

[0046] In this embodiment, since the knocking ball 13 and the conductive nozzle 18 are located on opposite sides and the rotation speed of the metal part 26 is relatively slow, there is a cooling time when the conductive nozzle 18 rotates to the knocking ball 13 after welding, so that the welding slag is formed, so that the knocking ball 13 can separate the welding slag from the weld when knocking.

[0047] Second embodiment: Reference Figure 1-14 , a metal parts welding process, comprising the following steps: S1: Welding parts placement: insert two metal parts 26 to be welded into the clamping areas of the two limiting mechanisms one by one; S2: Fitting and limiting the two welding parts: start the two driving parts at the same time, so that the driving parts drive the two pressure rings 6 to move toward each other, and the movement of the pressure ring 6 achieves two functions: first, push the gear ring 2 and the multiple clamping blocks 5 to slide elastically along the support rod 8 so that the two metal parts 26 located in the clamping area move toward each other until the end faces fit together; second, squeeze the multiple clamping blocks 5 to slide elastically toward the metal part 26 until the metal part 26 is clamped and limited; S3: Adjust the position of the conductive nozzle 18: adjust the front and rear positions of the conductive nozzle 18 so that the distance between the conductive nozzle 18 and the weld is within the required range. Since the axial centerline position of the metal parts 26 of different diameters remains unchanged when they are clamped and limited by the clamp block 5, it is only necessary to adjust the front and rear positions when adjusting the position of the conductive nozzle 18, eliminating the need for up, down, left, and right adjustments, making the adjustment of the conductive nozzle 18 faster; and the threaded rod 2302 has a variety of specifications with different lengths, which are used to adapt to metal parts 26 of different lengths, so that the welds of metal parts 26 of different lengths are always located at a specific position during welding. Therefore, the position of the conductive nozzle 18 does not need to be adjusted when welding metal parts 26 of different lengths, that is, the operation of adjusting the conductive nozzle 18 is omitted during welding of metal parts 26 of different lengths; S4: Welding: Start the reduction motor 11 to drive the roller 9 to rotate so that the two meshing teeth 901 drive the two gear rings 2 to rotate synchronously in a one-to-one manner, and then drive the two metal parts 26 with their end faces touching each other to rotate so that the conductive nozzle 18 can weld the weld. Since the metal part 26 is rotating, the distance between the conductive nozzle 18 and the rotating metal part 26 remains unchanged, so that the conductive nozzle 18 can achieve continuous welding for metal parts 26 with different diameters.

[0048] In step S4, a fixedly mounted vertical pole 12 is included, a knocking ball 13 is mounted on the vertical pole 12 through an elastic member 14, the knocking ball 13 is located on one side of the weld and opposite to the conductive nozzle 18, an arc rod 15 is fixedly mounted on the knocking ball 13, a hook plate 16 that abuts against the arc rod 15 is fixedly mounted on the rotating roller 9, and during the rotation of the rotating roller 9, the hook plate 16 is driven to intermittently abut against the arc rod 15 and pull the arc rod 15 and the knocking ball 13 to move away from the weld, and after the hook plate 16 is separated from the arc rod 15, the elastic force of the elastic member 14 drives the knocking ball 13 to knock the welding slag on the weld to separate the welding slag. Specifically, in the initial state, the knocking ball 13 does not contact the weld, but only uses the elastic force of the elastic member 14 to enable the knocking ball 13 to collide with the welding slag on the weld during the swinging process. Among them, a horizontal plate 104 is fixedly installed on the support frame 1, and the vertical rod 12 is fixedly installed on the horizontal plate 104. The vertical rod 12 is bent so that the vertical rod 12 will not contact the hook plate 16. The elastic member 14 is in a vertical state. One end of the elastic member 14 is fixedly connected to the vertical rod 12, and the other end is fixedly connected to the bottom of the knocking ball 13. The elastic member 14 supports the knocking ball 13 and the arc rod 15. The end of the hook plate 16 is hook-shaped. When the hook plate 16 abuts against the arc rod 15, the hook plate 16 abuts against the arc rod 15. A pulling force is generated away from the metal part 26. At this time, the hook plate 16 pulls the arc rod 15 and the knocking ball 13 away from the weld, and the elastic part 14 produces elastic deformation of bending. The elastic part 14 is a spring or a spring. As the hook plate 16 continues to rotate, the hook plate 16 is separated from the arc rod 15. After separation, the knocking ball 13 and the arc rod 15 are driven to swing toward the weld under the elastic force of the elastic part 14, and the knocking ball 13 can hit the weld, thereby knocking off the welding slag generated on the weld, thereby realizing automatic removal of the welding slag.

[0049] In this embodiment, through the above-mentioned welding process, the process of clamping and limiting the metal part 26 and the process of bonding the end faces of the two metal parts 26 can be simultaneously realized. The two processes can use the same set of driving mechanisms, and there is no need for different driving mechanisms to drive and realize them as in the prior art, thereby eliminating a set of driving mechanisms, and both processes are realized by limiting mechanisms, without the need for other mechanisms, thereby reducing the design of the structure, and both of these conveniences reduce the cost of the equipment; furthermore, the clamping and limiting process of the metal part 26 and the bonding process of the end faces of the two metal parts 26 are carried out simultaneously, rather than separately in the prior art, so that the two processes do not need to consume time separately, and the time difference between the two processes is also eliminated, thereby greatly reducing the time required for the preparation of the metal part 26 before welding; and when welding metal parts 26 of different lengths or metal parts 26 of different diameters, the operation steps of adjusting the position of the conductive nozzle 18 can be reduced, thereby greatly reducing the total welding time to improve the welding efficiency.

[0050] Moreover, in the process of the reduction motor 11 driving the rotating roller 9 to rotate and drive the metal part 26 to rotate for welding, it can also drive the bent hook plate 16 to drive the knocking ball 13 to hit the welding slag on the weld, so that the welding slag automatically falls off, solving the technical problem that the newly melted welding wire will directly cover the welding slag, thereby reducing the strength of the welding. At the same time, it also saves the operator from the operation of separately cleaning and collecting the welding slag after the welding is completed.

[0051] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A metal welding device, comprising two symmetrically arranged discs (25), each of which has a limit mechanism rotatably mounted thereon, characterized in that: The limiting mechanism comprises: a rotating ring (24) rotatably connected to the disc (25); a gear ring (2) on which a plurality of support rods (8) arranged circumferentially are slidably inserted, the ends of the plurality of support rods (8) being fixedly connected to a rotating ring (24), and a second tension spring (7) being sleeved on the support rod (8) with one end fixedly connected to the support rod (8) and the other end fixedly connected to the gear ring (2); A plurality of clamping blocks (5) which enclose a clamping area for inserting a metal member (26), wherein the plurality of clamping blocks (5) are located in the inner circle of the gear ring (2) and are equidistantly arranged around the axis of the gear ring (2) in the circumferential direction, and the clamping blocks (5) are elastically slidably connected to the gear ring (2) along the radial direction of the gear ring (2); a pressure ring (6) located in the inner circle of the gear ring (2) and coaxial with the gear ring (2); a plurality of clamping blocks (5) located in the inner circle of the pressure ring (6); and the pressure ring (6) and the outer inclined surfaces of the plurality of clamping blocks (5) are in sliding contact with each other; A driving member, which is mounted on the disc (25) and is rotatably connected to the pressure ring (6), and is used to drive the pressure ring (6) to move axially; Two metal parts (26) are inserted into the two clamping areas one by one. The driving part drives the two pressure rings (6) to slide towards each other so that the pressure rings (6) squeeze the multiple clamping blocks (5) to slide towards the metal parts (26) and then clamp the metal parts (26) to limit the position. In the process, the pressure ring (6) pushes the gear ring (2) and the multiple clamping blocks (5) to slide elastically along the support rod (8) so that the two metal parts (26) located in the clamping area move towards each other until the end faces are in contact.

2. The metal welding equipment according to claim 1, characterized in that: A plurality of groups of extension plates (201) corresponding to a plurality of clamping blocks (5) are fixedly mounted on the gear ring (2); two telescopic rods (4) are fixedly connected between each group of the extension plates (201) and the corresponding clamping block (5); the gear ring (2) is located between the two telescopic rods (4); a first tension spring (3) is sleeved on the telescopic rod (4); one end of the first tension spring (3) is fixedly connected to the extension plate (201), and the other end is fixedly connected to the clamping block (5).

3. The metal welding equipment according to claim 2, characterized in that: Two clearance holes (501) are provided on the outer inclined surface of the clamp block (5) and are plugged into the two telescopic rods (4) in a one-to-one correspondence. The bottom ends of the two telescopic rods (4) are fixedly connected to the bottom surfaces of the clearance holes (501). Based on the arrangement of the clearance holes (501), the two telescopic rods (4) have the same length, and the lengths of the two first tension springs (3) are also the same, so that the force on the clamp block (5) is more balanced.

4. The metal welding equipment according to claim 2, characterized in that: An extrusion block (601) is fixedly mounted on the inner circumferential surface of the pressure ring (6) and is in sliding contact with the outer inclined surfaces of the plurality of clamping blocks (5) in a one-to-one corresponding manner. When the two pressure rings (6) move toward each other, the extrusion block (601) is driven to slide along the outer inclined surface of the clamping block (5). Based on the inclination of the outer inclined surface of the clamping block (5), the extrusion block (601) squeezes the clamping block (5) toward the metal part (26). When the clamping block (5) moves, it pulls the first tension spring (3) to produce elastic deformation. When the two pressure rings (6) move in opposite directions, the corresponding clamping block (5) is driven to move toward the outside of the metal part (26) under the action of the elastic force of the first tension spring (3).

5. The metal welding equipment according to claim 1, characterized in that: The driving member comprises a driving motor (21) fixedly connected to the disc (25); a screw (22) is connected to the power output end of the driving motor (21); a push-pull column (23) is threadedly connected to the outer side of the screw (22); two symmetrically arranged fixing ears (2303) are fixedly mounted on the push-pull column (23); two limit rods (27) are fixedly mounted on the disc (25) and are slidably plugged in one-to-one correspondence with the two fixing ears (2303); the limit rods (27) are used to limit the rotation of the push-pull column (23); a joint (2304) is rotatably connected to the end of the push-pull column (23); the joint (2304) is fixedly connected to the pressure ring (6) via a plurality of circumferentially arranged L-shaped plates (602); the driving motor (21) is started to rotate to drive the screw (22) to rotate; the rotation of the screw (22) drives the push-pull column (23) to move axially, thereby driving the pressure ring (6) to move axially.

6. The metal welding equipment according to claim 5, characterized in that: A threaded hole (23041) is provided at the centre of the end face of the joint (2304), a threaded rod (2302) is threadedly connected inside the threaded hole (23041), an end plate (2301) is fixedly mounted at the end of the threaded rod (2302), the end plate (2301) corresponds to the clamping area, and the end face of the metal part (26) is in abutment with the end face of the end plate (2301).

7. The metal welding equipment according to claim 6, characterized in that: The threaded rod (2302) has a plurality of specifications with different lengths, and is used to adapt to metal pieces (26) of different lengths, so that the weld seams of the metal pieces (26) of different lengths are always located at specific positions during welding.

8. The metal welding equipment according to claim 1, characterized in that: It also includes a conductive nozzle (18) and a reduction motor (11), wherein the conductive nozzle (18) is located between the two limit mechanisms and on one side of the weld, and the power output end of the reduction motor (11) is connected to a roller (9), wherein the roller (9) includes two meshing teeth (901) meshing with the two gear rings (2) in a one-to-one correspondence, and the reduction motor (11) drives the roller (9) to rotate so that the two meshing teeth (901) drive the two gear rings (2) to rotate synchronously in a one-to-one correspondence, thereby driving the two metal parts (26) whose end surfaces are in contact with each other to rotate so that the conductive nozzle (18) welds the weld.

9. The metal welding equipment according to claim 8, characterized in that: It also includes a fixedly mounted vertical pole (12), on which a knocking ball (13) is mounted via an elastic member (14), the knocking ball (13) being located on one side of the weld and opposite to the conductive nozzle (18), an arc rod (15) being fixedly mounted on the knocking ball (13), and a curved hook plate (16) abutting against the curved rod (15) being fixedly mounted on the rotating roller (9), the curved hook plate (16) being driven to intermittently abut against the curved rod (15) during the rotation of the rotating roller (9) to pull the curved rod (15) and the knocking ball (13) to move away from the weld, and after the curved hook plate (16) is separated from the curved rod (15), the elastic force of the elastic member (14) drives the knocking ball (13) to knock against the welding slag on the weld to remove the welding slag.

10. A metal parts welding process, based on the metal parts welding equipment as described in any one of claims 1 to 9, characterized in that: The following steps are involved: S1: Welding parts placement: inserting two metal parts (26) to be welded into the clamping areas of the two limiting mechanisms in a one-to-one correspondence; S2: Fitting and limiting the two welding parts: two driving parts are started at the same time, so that the driving parts drive the two pressure rings (6) to move towards each other, and the movement of the pressure ring (6) achieves two functions: first, pushing the gear ring (2) and the plurality of clamping blocks (5) to slide elastically along the support rod (8) so that the two metal parts (26) located in the clamping area move towards each other until the end faces fit together; second, squeezing the plurality of clamping blocks (5) to slide elastically towards the metal parts (26) until the metal parts (26) are clamped and limited; S3: Adjusting the position of the conductive nozzle (18): adjusting the front and rear positions of the conductive nozzle (18) so that the distance between the conductive nozzle (18) and the weld is within the required range. Since the axial centerline position of the metal pieces (26) of different diameters remains unchanged when they are clamped and limited by the clamp block (5), it is only necessary to adjust the front and rear position when adjusting the position of the conductive nozzle (18), eliminating the need for up, down, left, and right adjustments, making the adjustment of the conductive nozzle (18) faster. Moreover, the threaded rod (2302) has a plurality of different lengths and specifications for adapting to metal pieces (26) of different lengths, so that the welds of the metal pieces (26) of different lengths are always located at a specific position during welding. Therefore, when welding metal pieces (26) of different lengths, the position of the conductive nozzle (18) does not need to be adjusted, that is, the operation of adjusting the conductive nozzle (18) is eliminated during welding of metal pieces (26) of different lengths. S4: Welding: Start the reduction motor (11) to drive the roller (9) to rotate so that the two meshing teeth (901) drive the two gear rings (2) to rotate synchronously in a one-to-one manner, thereby driving the two metal parts (26) whose end faces are in contact with each other to rotate so that the conductive nozzle (18) welds the weld seam. Since the metal part (26) rotates, the distance between the conductive nozzle (18) and the rotating metal part (26) remains unchanged, so that the conductive nozzle (18) can achieve continuous welding of metal parts (26) of different diameters.

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