A round tube automatic drawing welding machine

Abstract

The invention discloses an automatic round tube welding machine, which belongs to the field of profile processing, and more specifically, relates to an automatic round tube welding machine, comprising a machine body provided with a working surface, a roller for driving the round tube to rotate, a roller for pressing the round tube, a clamping device for clamping an end welding piece and driving the end welding piece to rotate synchronously with the round tube, and a welding head for welding; the round tube is in linear contact with the roller and two rollers respectively. In the invention, the roller is used as a clamping device to clamp the round tube, thereby increasing the acting force between the round tube and the roller, and then increasing the friction between the two, so that the round tube is not prone to slipping, and the roller can rotate synchronously with the round tube, thereby reducing the hindering force of the clamping device on the round tube.

Description

Technical Field

[0001] The invention belongs to the field of profile processing, and more specifically, relates to an automatic round tube drawing and welding machine. Background Art

[0002] Round tube is a common profile, which often appears in various processing fields. In many round tube applications, both ends of the round tube are often sealed.

[0003] There are usually two ways to weld round tubes. The first is the more common manual pull welding. Manual pull welding is not convenient for positioning during welding, resulting in slow welding speed and low efficiency. Only small amounts of sporadic processing can be performed. Moreover, the workers are relatively close to the workpiece during welding, which can easily cause injuries.

[0004] Based on manual pull welding, someone has designed a pull welding machine, which uses machines to replace workers' operation. This pull welding machine adopts drive shafts arranged side by side, and the drive shafts are arranged at intervals. The round tube is located between the two drive shafts. When the two drive shafts rotate in the same direction, the round tube is driven to rotate. The other end of the round tube is set on the rotating part of the driven rotating end welding part, and the welding gun is set at the place where the round tube needs to be welded. The end welding part and the round tube achieve synchronous rotation through the friction between the two, and the circumferential welding of the round tube is achieved under the action of the welding gun.

[0005] There is a problem with this type of pull welding machine, that is, the basis for the synchronous rotation between the round tube and the drive shaft is the friction generated between the surface of the drive shaft and the surface of the round tube, and some relatively light round tubes are not sufficient to generate enough friction to drive the round tube to rotate, resulting in the round tube slipping. Once the round tube slips, it causes relative rotation between the end weld and the round tube, which leads to uneven welding at the welding point. Especially in the initial welding, when the end weld and the round tube have not yet formed a firm weld, once the two rotate relative to each other, it is easy to cause welding leakage or overlap welding, reducing the safety of the product.

[0006] Therefore, there is an urgent need for a machine on the market to make up for the problem of leak welding or overlap welding that the existing products are prone to. Summary of the invention

[0007] The main purpose of the invention is to provide an automatic round tube drawing welding machine to solve the problem that the existing products are prone to leaking welding points.

[0008] The technical solution adopted by the present invention is: an automatic round tube welding machine, comprising:

[0009] A machine body, wherein the machine body is provided with a working surface;

[0010] A transmission device is arranged on the working surface, the transmission device comprises two rollers rotating in the same direction, and the two rollers are arranged horizontally and spaced apart;

[0011] A pressing device, comprising a roller disposed above the two rollers;

[0012] A clamping device is provided at one end of the two rollers and is used to install the end welding piece, and the clamping device drives the end welding piece to rotate synchronously with the round tube;

[0013] A welding device, the welding device comprising a welding head, the welding head is arranged at the contact position between the end welding piece and the round tube to weld the end welding piece and the round tube;

[0014] The round tube is in linear contact with the roller and the two rollers respectively.

[0015] In this technical solution, the roller can be pressed tightly against the round tube so that the round tube is subjected to a sufficiently large force to ensure that a sufficiently large friction force is generated between the round tube and the two rollers to prevent the round tube from slipping; then the clamping device that can rotate synchronously with the round tube can cooperate to further reduce the probability of relative rotation between the end weldment and the round tube.

[0016] According to a further optimized technical solution, the clamping device includes a chuck, an end positioning piece and a rotating shaft, wherein the chuck is arranged at one end of the rotating shaft, the chuck clamps the end positioning piece, and the end positioning piece is provided with a mounting portion.

[0017] In this technical solution, the clamping device is optimized to ensure that the clamping device can better fix the end weldment.

[0018] According to a further optimized technical solution, the transmission device further comprises a power assembly, wherein the power assembly drives the rotating shaft and the two rollers respectively, and the rotating shaft and the rollers rotate in opposite directions and at the same speed.

[0019] In this technical solution, the rollers and the rotating shaft rotate in opposite directions but at the same speed, ensuring that the round tubes on the two rollers and the rotating shaft maintain the same rotation direction and speed, and no speed difference will occur due to inconsistent speeds of the rollers or the rotating shaft.

[0020] A further optimized technical solution is that the power assembly includes a motor, a driving shaft and a driven shaft, the motor is drivingly connected to the driving shaft, the driving shaft is meshing with the driven shaft, a first belt drive is used between the roller and the driving shaft, and the driven shaft and the rotating shaft are connected by a second belt.

[0021] In this technical solution, the same motor is used to drive the rotating shaft and the driving shaft, which further ensures that the rotation speeds of the two are consistent.

[0022] According to a further optimized technical solution, the clamping device further comprises a lifting assembly, and the rotating shaft is arranged on the lifting assembly to adjust the height between the chuck and the working surface.

[0023] In the present technical solution, the lifting assembly is used to adjust the height of the end welding piece in order to adapt to round tubes with different apertures.

[0024] According to a further optimized technical solution, the clamping device further comprises a guide wheel, and the guide wheel is in elastic contact with the second belt.

[0025] In the technical solution, the length of the movement path of the second belt is changed by the guide wheel to ensure that the second belt does not slip during transmission.

[0026] According to a further optimized technical solution, the clamping device further comprises a moving component, the roller is arranged on the moving component, and the moving component is used to control the distance between the roller and the round tube.

[0027] In the technical solution, the clamping device has the function of moving up and down, can adapt to round tubes with different aperture sizes, and ensure that the roller can be in linear contact with the round tube.

[0028] According to a further optimized technical solution, the welding device further comprises a swinging assembly, wherein the swinging assembly comprises a longitudinal sliding member and a rotating member, wherein the rotating member is arranged on the longitudinal sliding member, and the welding head is placed on the rotating member.

[0029] In the technical solution, the welding head has the functions of moving up and down and rotating, so that the welding head can adapt to more situations during welding.

[0030] According to a further optimized technical solution, the round tube automatic drawing welding machine also includes a PLC, and the PLC is respectively connected to the motor and the welding head signals.

[0031] One of the above technical solutions of the present invention has at least one of the following advantages or beneficial effects:

[0032] In the present invention, a roller is used as a clamping device to clamp the round tube, thereby increasing the force between the round tube and the roller, thereby increasing the friction between the two, making it less likely for the round tube to slip. Moreover, the roller can rotate synchronously with the round tube, reducing the resistance of the clamping device to the round tube.

[0033] The automatic round tube welding machine can be used to automatically weld round tubes, which can effectively reduce the area of ​​weld scars and reduce the damage of weld scars to the pipes. After welding, it is more convenient to grind the welded parts of the round tubes. The tolerance of the automatic welding of round tubes can be reduced to 0.1mm, and the welding cost can be significantly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0035] Figure 1 It is an overall schematic diagram of the present invention;

[0036] Figure 2 yes Figure 1 The enlarged schematic diagram of part A in the middle;

[0037] Figure 3 It is a schematic diagram of the connection between the transmission device and the clamping device.

[0038] Among them, 1-body, 2-transmission device, 3-pressing device, 4-clamping device, 5-welding device, 21-roller, 22-power assembly, 221-motor, 222-driving shaft, 223-driven shaft, 224-first belt, 31-roller, 32-rolling assembly, 321-first guide column, 322 roller frame, 323-cylinder, 41-end positioning member, 42-rotating shaft, 43-second belt, 44-lifting assembly, 45-adjusting assembly, 451-slide plate, 452-baffle, -elastic member, 454-guide wheel, 51-swinging assembly, 511-longitudinal sliding member, 512-rotating member, 513-welding head, 6-round tube. DETAILED DESCRIPTION

[0039] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0040] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be internal connection between two elements, indirect connection, or an interactive relationship between two elements.

[0044] The following disclosure provides many different embodiments or examples for implementing different solutions of the present invention.

[0045] like Figure 1-3 The automatic round tube welding machine shown in the figure includes a machine body 1, on which a working surface is arranged. A transmission device 2 is arranged above the working surface, and the transmission device 2 includes a roller 21, and the roller 21 includes two rollers 21, which are arranged horizontally with an interval, and the two rollers 21 have the same rotation direction and speed. Specifically, a bracket is arranged on the working surface, and the two rollers 21 are arranged on the bracket, and the two rollers 21 are respectively arranged on the bracket through a first bearing. Above the two rollers 21 is a working space for placing the round tube 6.

[0046] The transmission device 2 also includes a power assembly 22, which includes a motor 221, the motor 221 is connected to a driving shaft 222, and two first belts 224 are provided on the driving shaft 222. The two first belts 224 are respectively connected to different rollers 21, and the function of the first belts 224 is to transmit the power of the driving shaft 222 to the roller 21. Since the two first belts 224 are connected to the same motor 221, the rotation direction and rotation speed of the two rollers 21 are the same, which prevents the round tube 6 placed on the two rollers 21 from deflecting due to the different rotation speeds of the two rollers 21. Preferably, the surface of the roller 21 is provided with an anti-slip pattern.

[0047] A clamping device 3 is also arranged above the transmission device 2. The clamping device 3 includes a moving assembly 32 and a roller 31. The moving assembly 32 includes a first guide column 321. The first guide column 321 is arranged on the working surface. A cylinder 323 is arranged on the first guide column 321. The roller 31 is arranged at the telescopic end of the cylinder 323. Further, a roller frame 322 is arranged at the telescopic end of the cylinder 323. At least one roller 31 is arranged on the roller frame 322. Each roller 31 is arranged in a colinear manner, and the roller 31 is located above the working space. When the cylinder 323 is extended, the roller 31 is in linear contact with the round tube 6. The roller 31 can be a passive roller 31 or an active roller 31. The passive roller 31 refers to a roller without a power source, and the rotation of the roller 31 is realized by the friction between the roller 31 and the round tube 6. The active roller 31 refers to a roller with a power source, and the synchronous rotation of the roller 31 and the round tube 6 is realized by the power source. In this embodiment, two driven rollers 31 are selected and provided.

[0048] The roller 31 can be in linear contact with the circular tube 6, and the roller 31 continuously applies a downward force to the circular tube 6, so that a sufficiently large friction force is generated between the circular tube 6 and the two rollers 21, and the circular tube 6 is driven to rotate by the two rollers 21. In addition, since the roller 31 and the circular tube 6 can rotate, it is different from the conventional pressure applied to the circular tube 6, which is not only in the vertical downward direction, but also easily generates a force in the horizontal direction, and cannot ensure the force balance of the circular tube 6.

[0049] A clamping device 4 is also provided on the working surface, and the clamping device 4 includes a chuck and a rotating shaft 42. The chuck is fixed at one end of the rotating shaft 42, and the chuck is connected to the rotating shaft 42 through a flange. When the rotating shaft 42 rotates, the chuck can rotate synchronously with the rotating shaft 42. The rotating shaft 42 is connected to a driven shaft 223 through a second belt 43. The driven shaft 223 is a part of the power assembly 22. The driving shaft 222 is meshed with the driven shaft 223 through gears. The driving shaft 222 can drive the driven shaft 223 through gears, and the driven shaft 223 is transmitted to the rotating shaft 42 and the chuck through the second belt 43. The gears on the driven shaft 223 and the driving shaft 222 are selected to be 1:1 transmission to ensure that the driving shaft 222 and the driven shaft 223 have the same rotation speed. At this time, the driving shaft 222 and the driven shaft 223 rotate in opposite directions.

[0050] Since the end welding parts are mostly thin sheets with through holes in the middle, in order to facilitate the installation of the end welding parts on the chuck, an end positioning part 41 is also clamped on the chuck. The end positioning part 41 is a part used to assist in the installation of the end welding parts. The end positioning part 41 is divided into a mounting part and a clamping part, wherein the clamping part is used to be clamped by the chuck, and the mounting part is used to install the end welding parts. The mounting part and the clamping part are both cylindrical, and the diameter of the mounting part is smaller than the diameter of the clamping part. The diameter of the mounting part is consistent with the aperture size of the end welding part, and the mounting part is provided with an external thread. When welding the end welding part and the round tube 6, the end positioning part 41 is clamped by the chuck, and the through hole of the end welding part is screwed to the mounting part and screwed to the bottom end of the mounting part. At this time, the mounting part not only plays the role of placing the end welding part, but also plays the role of positioning.

[0051] The transmission device 2 further includes a lifting assembly 44, on which the rotating shaft 42 is arranged for adjusting the distance between the rotating shaft 42 and the working surface, and the lifting assembly 44 includes a second guide column and a second bearing, the second guide column is arranged on the working surface, the second bearing is slidably arranged on the second guide column, and the second bearing is used to connect the rotating shaft 42. When the height of the second bearing is adjusted, the longitudinal distance between the rotating shaft 42 and the drum 21 can be adapted to round tubes 6 of different diameters.

[0052] Since the driven shaft 223 and the rotating shaft 42 are driven by a belt, when the height of the rotating shaft 42 is adjusted or the second belt 43 is used for a long time, the second belt 43 may be too loose and easily slip. For this reason, the clamping device 4 also includes an adjustment component 45, which is arranged on the working surface. The adjustment component 45 includes a slide plate 451 and a baffle plate 452. The slide plate 451 is slidably connected to the working surface. A guide wheel 454 is arranged at one end of the slide plate 451. An elastic member is arranged between the baffle plate 452 and the slide plate 451. The guide wheel 454 abuts against the second belt 43. When the rotating shaft 42 is adjusted downward, the second belt 43 becomes loose. At this time, the guide wheel 454 pushes the second belt 43 under the action of the elastic member, so that the second belt 43 is still in a tight state, avoiding the idle rotation of the driven shaft 223; on the contrary, when the second belt 43 is in a tight state, the second belt 43 presses the guide wheel 454 to rebound, and the guide wheel 454 abuts against the second belt 43, and is driven to rotate by the second belt 43.

[0053] A welding device 5 is also provided in the workspace. The welding device 5 includes a welding head 513 and a swing assembly 51. The swing assembly 51 specifically includes a longitudinal sliding member 511 and a rotating member 512. The longitudinal sliding member 511 includes a third guide column and a bottom plate. The bottom plate is detachably arranged on the third guide column. The rotating member 512 is arranged on the bottom plate and can rotate relative to the bottom plate. The rotating member 512 includes a rotating plate. The welding head 513 is arranged on the rotating plate. An arc groove is arranged on the rotating plate. The arc groove is arranged on the left and right sides of the rotating plate. Fastening screws are arranged in the arc groove to fix the rotating plate to the bottom plate. When the rotating plate rotates relative to the bottom plate, the welding head 513 rotates with the rotating plate at the same time.

[0054] The aforementioned welding head 513 is also connected to a welding machine, and the connection between the welding machine and the welding head 513 is connected using existing technology.

[0055] In order to realize automatic control, the round tube automatic drawing welding machine also includes a PLC, and the PLC signal is connected to the motor 221, the cylinder 323 and the welding head 513 and is controlled by the control panel.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A round tube automatic drawing welding machine, characterized in that: include: A machine body (1), wherein the machine body (1) is provided with a working surface; A transmission device (2) is arranged on the working surface, the transmission device (2) comprising two rollers (21) rotating in the same direction, the two rollers (21) being arranged horizontally and spaced apart; A pressing device (3), comprising a roller (31) disposed above the two rollers (21); A clamping device (4) is arranged at one end of the two rollers (21) and is used to install an end welding piece. The clamping device (4) drives the end welding piece and the round tube (6) to rotate synchronously. The clamping device (4) comprises a chuck, an end positioning piece (41) and a rotating shaft (42). The chuck is arranged at one end of the rotating shaft (42). The chuck clamps the end positioning piece (41). The end positioning piece (41) is provided with a mounting portion. The diameter of the mounting portion is consistent with the hole size of the end welding piece. The mounting portion is provided with an external thread. The transmission device (2) comprises a power assembly (22). The power assembly (22) comprises a motor (221), a driving shaft (222) and a driven shaft (223). The motor (221) is drivingly connected to the driving shaft (222). The driving shaft (222) is meshed with the driven shaft (223); the roller (21) and the driving shaft (222) are driven by a first belt (224); the driven shaft (223) and the rotating shaft (42) are connected by a second belt (43); the power assembly (22) drives the rotating shaft (42) and the two rollers (21) respectively; the rotating shaft (42) and the rollers (21) rotate in opposite directions and at the same speed; the clamping device (4) further comprises a lifting assembly (44); the rotating shaft (42) is arranged on the lifting assembly (44) to adjust the height between the chuck and the working surface; the clamping device (4) further comprises a guide wheel (454); the guide wheel (454) is elastically abutted against the second belt (43); A welding device (5), the welding device (5) comprising a welding head (513), the welding head (513) being arranged at a contact point between the end welding piece and the round tube (6) for welding the end welding piece and the round tube (6); The circular tube (6) is in linear contact with the roller (31) and the two rollers (21) respectively.

2. The round tube automatic drawing welding machine according to claim 1 is characterized in that: The pressing device (3) further comprises a moving component (32), the roller (31) being arranged on the moving component (32), and the moving component (32) being used to control the distance between the roller (31) and the round tube (6).

3. The round tube automatic drawing welding machine according to claim 1 is characterized in that: The welding device (5) further comprises a swing assembly (51), wherein the swing assembly (51) comprises a longitudinal sliding component (511) and a rotating component (512), wherein the rotating component (512) is arranged on the longitudinal sliding component (511), and the welding head (513) is placed on the rotating component (512).

4. The round tube automatic drawing welding machine according to claim 1 is characterized in that: The round tube automatic drawing welding machine also includes a PLC, and the PLC is respectively connected to the motor (221) and the welding head (513) by signals.

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