Welding device for wheel production

Abstract

The invention discloses a welding device for wheel production, and relates to the wheel welding technology, the welding device comprises a mounting frame body, an annular plate mounting mechanism used for clamping an annular steel plate is arranged in the mounting frame body, a pressure welding mechanism and an arc-shaped jacking plate are further arranged on the mounting frame body, and a pressure sensor is arranged on the arc-shaped jacking plate; the pressure welding mechanism controls the extrusion amplitude based on the real-time pressure; according to the welding device for wheel production, the pressure welding mechanism is used for pressing downwards to provide pressure for the welding position of the annular steel plate, then welding work is carried out, the extrusion amplitude is controlled through the pressure welding mechanism based on the real-time pressure, the situation that the contact area is insufficient due to the fact that the pressure is too small is avoided, and the welding quality is improved. And the adverse effects of overlarge seam areas can be avoided, too small welding seams caused by overlarge pressure can be avoided, the adverse effects of bearing capacity and fatigue strength of welding positions are reduced, and the welding quality of the steel ring is ensured.

Description

Technical Field

[0001] The present invention relates to wheel welding technology, and particularly to a welding device for wheel production. Background Art

[0002] The wheel is an important part of the vehicle running mechanism. It not only supports the weight of the whole vehicle and alleviates the road impact, but also generates driving force and braking force through the adhesion of the tire to the road surface to ensure the normal driving of the vehicle. The wheel mainly consists of a rim, a spoke, a hub and a tire. Among them, the rim is also called a steel ring. In the process of manufacturing the rim, generally, the cut steel plate needs to be bent into a ring shape first, and then the connection part is welded with a welding torch.

[0003] For example, in the patent with the authorization announcement number CN112756878B, the authorization announcement date is July 29, 2022, and the name is a butt welding platform for electric vehicle hub production. It includes a machine base and a welding device. There is a welding area below the welding device. The machine base is provided with a circumferential alignment mechanism for clamping and aligning the connection parts of the steel ring to be welded. The circumferential alignment mechanism includes a first rotating arm and a second rotating arm which are identical in structure and symmetrically coaxially hinged on a fixed seat directly below the welding area. Both the first rotating arm and the second rotating arm are provided with a clamping mechanism for fixing the steel ring. The clamping mechanism is provided with a protection mechanism and a position adjustment mechanism for shielding the welding area. By setting the circumferential alignment mechanism and the protection mechanism, the present invention realizes the clamping and fixing of both sides of the steel ring seam, provides a tangential pressing force, plays a role in improving the welding effect, the protection structure plays a role in shielding spatter and sparks, and the protection mechanism relies on the clamping mechanism and has a linkage effect, ensuring the simplicity of the structure and reducing costs.

[0004] Another example is the patent with the authorization announcement number CN117900838B, the authorization announcement date is June 25, 2024, and the name is an efficient integrated processing equipment for automobile wheels. It includes a cutting, transporting and forming structure, a protection frame, a welding treatment structure and a belt. The front end of the cutting, transporting and forming structure is butt-connected and communicated with the welding treatment structure. The front end of the welding treatment structure is fixedly connected with a protection frame. The rear end of the cutting, transporting and forming structure is provided with a belt for power transmission in the cutting, transporting and forming structure. The cutting, transporting and forming structure includes a guiding and cutting component, a support frame and a forming and bending component. The lower end of the guiding and cutting component is fixedly supported by the support frame, and the bottom of the guiding and cutting component is butt-connected and communicated with the forming and bending component. The present invention is an efficient integrated processing equipment for automobile wheels. By setting the cutting, transporting and forming structure and the welding treatment structure, the purpose of efficient integrated processing of automobile wheels is realized.

[0005] In the prior art, in order to avoid excessive weld seams at the welding joints of the annular steel plates and affect the welding quality, it is often necessary to apply pressure to the welding joints of the annular steel plates. However, if the pressure is too small, it may lead to insufficient contact area and too large a joint area, affecting the welding effect. If the pressure is too large, it may lead to too small weld seams and reduce the bearing capacity and fatigue strength of the welding joints, affecting the connection quality of the welding joints. Summary of the Invention

[0006] The purpose of the present invention is to provide a welding device for wheel production to solve the above deficiencies in the prior art.

[0007] To achieve the above purpose, the present invention provides the following technical solutions:

[0008] A welding device for wheel production, which is used to weld the two ends of a steel plate rolled into a ring. It includes a mounting frame body. A ring plate mounting mechanism for clamping the annular steel plate is arranged inside the mounting frame body. A pressure welding mechanism and an arc-shaped top pressing plate are also arranged on the mounting frame body. The arc-shaped top pressing plate is used to cooperate with the pressure welding mechanism to squeeze the welding position of the annular steel plate. A pressure sensor is arranged on the arc-shaped top pressing plate, and the pressure sensor is used to detect the real-time pressure at the welding position of the annular steel plate; the pressure welding mechanism controls the extrusion amplitude based on the real-time pressure.

[0009] In the above-mentioned welding device for wheel production, the ring plate mounting mechanism includes an outer support plate fixed inside the mounting frame body. A plurality of limiting roller groups are also installed inside the mounting frame body, and the limiting roller groups are used to maintain the state of the annular steel plate during welding.

[0010] In the above-mentioned welding device for wheel production, the center of the arc-shaped top pressing plate and the center of the annular steel plate are on the same virtual circle.

[0011] In the above-mentioned welding device for wheel production, the pressure welding mechanism includes a fixed plate fixed inside the mounting frame body. A moving mounting plate is elastically installed on the fixed plate through a first spring rod. A hydraulic cylinder is also installed on the top wall of the mounting frame body, and the movable end of the hydraulic cylinder is connected to the moving mounting plate. A cooperating extrusion plate is formed on one side of the lower end of the moving mounting plate, and the cooperating extrusion plate and the arc-shaped top pressing plate are arranged in corresponding cooperation.

[0012] In the above-mentioned welding device for wheel production, the lower end surface of the cooperating extrusion plate is arc-shaped.

[0013] In the above-mentioned welding device for wheel production, the two ends of the annular steel plate are respectively a first end and a second end. The end of the second end is located above the end of the first end, and the cooperating extrusion plate is located on the side close to the second end.

[0014] The above-mentioned welding device for wheel production, on one side of the lower end of the movable mounting plate near the first end, a through groove is provided. On the upper end of the movable mounting plate, a linear guide rail is installed. An electric slider is slidably mounted on the linear guide rail. A welding gun is installed on the electric slider. The welding gun is located in the through groove and the muzzle of the welding gun is inclined.

[0015] In the initial state of the above-mentioned welding device for wheel production, there is a certain distance in the vertical direction between the welding gun and the welding position of the annular steel plate.

[0016] In the above-mentioned welding device for wheel production, the width of the through groove is not less than the width of the annular steel plate.

[0017] In the above-mentioned welding device for wheel production, the included angle between the welding gun and the movable mounting plate is 45 degrees.

[0018] In the above technical solution, the present invention provides a welding device for wheel production. The pressure welding mechanism is used to press down to provide pressure to the welding position of the annular steel plate and then perform welding work. The pressure at the welding position of the annular steel plate is detected in real time through a pressure sensor. The extrusion amplitude is controlled based on the real-time pressure by the pressure welding mechanism, avoiding the adverse effects of insufficient contact area and too large seam area caused by too small pressure, and also avoiding the adverse effects of too small weld seam and reduced bearing capacity and fatigue strength of the welded joint caused by too large pressure, ensuring the welding quality of the steel ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a three-dimensional structure diagram of a welding device for wheel production provided by an embodiment of the present invention.

[0021] Figure 2 It is a three-dimensional structure diagram of a pressure welding mechanism provided by an embodiment of the present invention.

[0022] Figure 3 It is a partial three-dimensional structure diagram of a pressure welding mechanism provided by an embodiment of the present invention.

[0023] Figure 4 It is a partial three-dimensional structure diagram of a pressure welding mechanism from the first perspective provided by another embodiment of the present invention.

[0024] Figure 5Partial three-dimensional structural schematic diagram of the pressure welding mechanism from the second perspective provided by another embodiment of the present invention.

[0025] Figure 6 Partial cross-sectional view of the cooperating extrusion plate provided by another embodiment of the present invention.

[0026] Figure 7 Cross-sectional view of the pressure welding mechanism provided by another embodiment of the present invention.

[0027] Figure 8 Cross-sectional view of the pressure welding mechanism provided by still another embodiment of the present invention.

[0028] Figure 9 For the present invention Figure 8 Local enlarged view at X.

[0029] Figure 10 Partial three-dimensional structural schematic diagram (removing the movable mounting plate) of the pressure welding mechanism provided by still another embodiment of the present invention.

[0030] Explanation of reference numerals:

[0031] 1. Mounting frame; 2. Ring plate mounting mechanism; 21. Outer support plate; 22. Limiting roller group; 3. Pressure welding mechanism; 31. Fixed plate; 32. Movable mounting plate; 321. Working groove; 322. Extrusion block; 323. Connecting groove; 324. L-shaped connecting piece; 325. Compression spring; 326. Driving rod; 327. Trapezoidal driving block; 328. Through groove; 329. Sliding shaft; 33. First spring rod; 330. Stopping portion; 331. Movable bracket; 332. Driving lead screw; 333. Pulling rope; 334. Oblique pressure rod; 335. Second spring rod; 34. Hydraulic cylinder; 35. Cooperating extrusion plate; 36. Passing through groove; 37. Linear guide rail; 38. Welding gun; 39. Support frame; 4. Arc-shaped top pressing plate; 41. Pressure sensor. Detailed implementation manners

[0032] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further introduced in detail below with reference to the accompanying drawings.

[0033] As Figures 1-10As shown in the figure, a welding device for wheel production provided by an embodiment of the present invention is used to weld the two ends of a steel plate rolled into a ring shape. It includes a mounting frame 1, and a ring plate mounting mechanism 2 for clamping the annular steel plate (i.e., the steel plate rolled into a ring shape) is arranged inside the mounting frame 1. A pressure welding mechanism 3 and an arc-shaped top pressing plate 4 are also arranged on the mounting frame 1. The arc-shaped top pressing plate 4 is used to cooperate with the pressure welding mechanism 3 to squeeze the welding position of the annular steel plate. A pressure sensor 41 is arranged on the arc-shaped top pressing plate 4, and the pressure sensor 41 is used to detect the real-time pressure at the welding position of the annular steel plate; the pressure welding mechanism 3 controls the extrusion amplitude based on the real-time pressure.

[0034] Specifically, in this embodiment, during the production process of the steel ring, a steel plate of a specific length needs to be bent into a structure approximately in the shape of a ring and then welded. This structure approximately in the shape of a ring is defined as the annular steel plate. The products in the steel ring production process are sequentially defined as: steel plate - annular steel plate - steel ring. It should be noted that during welding, the two ends of the annular steel plate are not aligned and abutted together, but one end is on the upper side and the other end is on the lower side. The two ends of the annular steel plate are respectively defined as the first end and the second end, and the end of the second end is located above the end of the first end. The distance between these two ends is the weld seam. This is to ensure the welding effect. After welding, the welded part also needs to be partially removed; the installation frame 1 is a box-shaped structure with an opening at the front in the shape of a square. The ring plate installation mechanism 2 is used to limit and install the annular steel plate to facilitate the welding work. The pressure welding mechanism 3 is used to apply a certain pressure to the welding position to facilitate synchronous welding. The arc-shaped top pressing plate 4 is an arc-shaped plate structure and is located directly below the welding position. It is used to provide an upward pressure to the first end of the welding position. When the pressure welding mechanism 3 moves downward to apply pressure to the welding position, the arc-shaped top pressing plate 4 provides an upward pressure so that both the upper and lower ends of the welding position are squeezed, and a pressure sensor 41 is provided on the squeezing path; in this way, the pressure sensor 41 is used to detect the real-time pressure applied by the pressure welding mechanism 3 to the welding position, which is prior art and will not be elaborated here. In addition, during the welding process, the pressure welding mechanism 3 can control its own downward squeezing amplitude according to the change speed of the real-time pressure. For example, it is always controlled that the squeezing pressure is between 1000N - 1200N. Obviously, rising can reduce the pressure and falling can increase the pressure. This is prior art and will not be elaborated;Specifically, during a complete welding process, first install the annular steel plate in the ring plate installation mechanism 2, make the first end fit on the arc-shaped top pressing plate 4 and press the pressure sensor 41. The welding position is located above the arc-shaped top pressing plate 4. Start the pressure welding mechanism 3 to move it downward to press the welding position (actually, only press the upper end of the second end), so that the weld seam gradually shrinks (the two ends of the annular steel plate gradually come into contact). The pressure value detected by the pressure sensor 41 fluctuates within a certain range. When the two ends of the annular steel plate are completely in contact, that is, when the volume of the weld seam approaches zero, the pressure value detected by the pressure sensor 41 increases rapidly. This is because the pressure applied by the pressure welding mechanism 3 to the second end is directly transmitted to the first end. Therefore, the pressure value detected by the pressure sensor 41 will rise rapidly. At this time, control the descending distance of the pressure welding mechanism 3 to control the pressing amplitude. In this way, the volume of the weld seam can be kept within a specific range (the first end and the second end are in contact but not tightly pressed together). In this way, by controlling the pressing amplitude of the pressure welding mechanism 3 based on the real-time pressure, it is possible to avoid the adverse effects of insufficient contact area and too large a joint area caused by too small pressure, and also avoid the adverse effects of too small a weld seam and reduced bearing capacity and fatigue strength at the welded joint caused by too large pressure, ensuring the welding quality of the steel ring.

[0035] In another embodiment provided by the present invention, the ring plate installation mechanism 2 includes an outer support plate 21 fixed in the installation frame 1. The outer support plate 21 is arc-shaped and is used for preliminarily supporting the annular steel plate. A plurality of limiting roller groups 22 are also installed in the installation frame 1. Each limiting roller group 22 includes two limiting rollers, and the two limiting rollers are arranged oppositely. The limiting roller group 22 is used to maintain the state of the annular steel plate during welding and facilitate the annular movement of the annular steel plate so that the welding position is aligned with the arc-shaped top pressing plate 4.

[0036] In another embodiment provided by the present invention, the center of the arc-shaped top pressing plate 4 and the center of the annular steel plate are on the same virtual circle. This is to make the upper end of the arc-shaped top pressing plate 4 and the welding position of the annular steel plate fit together better and facilitate maintaining a certain radian at the welding position.

[0037] In yet another embodiment provided by the present invention, the pressure welding mechanism 3 includes a fixed plate 31 fixed in the mounting frame 1. A moving mounting plate 32 is elastically mounted on the fixed plate 31 through a first spring rod 33. The moving mounting plate 32 is mounted through the first spring rod 33. A hydraulic cylinder 34 is further mounted on the top wall of the mounting frame 1. The movable end of the hydraulic cylinder 34 is connected to the moving mounting plate 32. A mating extrusion plate 35 is formed on one side of the lower end of the moving mounting plate 32. The mating extrusion plate 35 is arranged in corresponding cooperation with the arc-shaped top pressing plate 4. Preferably, the ends of both of them close to each other are arc surfaces. The rising and falling of the moving mounting plate 32 are controlled by the hydraulic cylinder 34, thereby controlling the extrusion amplitude of the mating extrusion plate 35. The lower end surface of the mating extrusion plate 35 is arc-shaped, so as to also make the welding position have a certain curvature. The mating extrusion plate 35 is located on the side close to the second end, so as to make the mating extrusion plate 35 only extrude the second end. Specifically, during operation, after the annular steel plate is installed, the hydraulic cylinder 34 is started to push the moving mounting plate 32 downward. At the same time, the mating extrusion plate 35 also moves downward and contacts the second end. The moving mounting plate 32 continues to move downward to reduce the weld seam. When the pressure sensor 41 detects that the real-time pressure rapidly increases to the set value or range, the movement of the moving mounting plate 32 is stopped and it is slightly moved upward to restore the weld seam.

[0038] In yet another embodiment provided by the present invention, a through slot 36 is opened on one side of the lower end of the moving mounting plate 32 close to the first end. A linearly driven linear guide rail 37 is mounted on the upper end of the moving mounting plate 32. The linear guide rail 37 is an electrically driven electric guide rail, which is prior art and will not be elaborated. The through slot 36 is square and parallel to the linear guide rail 37. An electric slider is slidably mounted on the linear guide rail 37. A welding gun 38 is mounted on the electric slider. The welding gun 38 is located in the through slot 36 and the muzzle of the welding gun 38 is inclined. When the adjustment of the pressure welding mechanism 3 is completed, the position pointed by the muzzle of the welding gun 38 is exactly the position where the weld seam is located. In the initial state, there is a certain distance in the vertical direction between the welding gun 38 and the welding position of the annular steel plate. This distance is for facilitating the installation of the annular steel plate. The width of the through slot 36 is not less than the width of the annular steel plate, so as to ensure that the welding gun 38 can completely contact the whole weld seam. The range of the angle between the welding gun 38 and the moving mounting plate 32 is 30 degrees to 60 degrees, preferably 45 degrees. Specifically, during operation, when the adjustment of the pressure welding mechanism 3 is completed, the linear guide rail 37 and the welding gun 38 are started simultaneously, so that the electric slider slides and drives the welding gun 38 to perform a linear motion along the extension direction of the weld seam. In this way, the welding position of the annular steel plate is linearly welded by the welding gun 38, and the first end and the second end are welded together.

[0039] Further, in order to ensure that when welding, the second end is bent on the upper side of the first end to prevent the second end from warping, it is necessary to cooperate with the pressing plate 35 to completely cover the end of the second end. However, when the pressing plate 35 is used to cover the end of the second end, welding slag is likely to remain on the pressing plate 35 after welding, and even partial adhesion may occur between the annular steel plate and the pressing plate 35 due to high temperature. Therefore, this embodiment provides a further solution to solve the above technical problems. A plurality of working grooves 321 are formed in the lower side of the pressing plate 35 near one end of the welding gun 38. An extrusion block 322 is slidably installed in the working grooves 321. The extrusion block 322 is integrally a square block structure and the lower end surface is slightly curved to adapt to the outer surface of the second end. When the pressure welding mechanism 3 contacts the second end, the length of the extrusion block 322 can cover the end of the second end. A connecting groove 323 is further formed in the upper end of the moving mounting plate 32. The connecting groove 323 penetrates through the moving mounting plate 32 and communicates with the working grooves 321. An L-shaped connecting piece 324 is fixedly provided at one end of the extrusion block 322 away from the welding gun 38. The L-shaped connecting piece 324 is formed by connecting a horizontal section and a vertical section. The horizontal section of the L-shaped connecting piece 324 is fixed on the extrusion block 322. The vertical section of the L-shaped connecting piece 324 is located on the side away from the welding gun 38. A compression spring 325 is connected between the vertical section of the L-shaped connecting piece 324 and the working grooves 321. A driving rod 326 is installed at one end of the electric slider away from the welding gun 38. The driving rod 326 extends into the connecting groove 323. A trapezoidal driving block 327 is fixedly provided at the lower end of the driving rod 326. The trapezoidal driving block 327 is horizontally arranged. The trapezoidal driving block 327 and the vertical section of the L-shaped connecting piece 324 are arranged in a corresponding and cooperative manner. When the trapezoidal driving block 327 slides in the connecting groove 323, it will contact and push the vertical section of the L-shaped connecting piece 324 to move. One end of the trapezoidal driving block 327 close to its moving direction is an inclined surface. When the trapezoidal driving block 327 moves linearly following the electric slider, the trapezoidal driving block 327 first contacts and pushes the vertical section of the L-shaped connecting piece 324 to move. The trapezoidal driving block 327 is located above the horizontal section of the L-shaped connecting piece 324. After the annular steel plate is installed in the ring plate mounting mechanism 2, the moving mounting plate 32 is driven to move downward and the extrusion block 322 moves synchronously. A plurality of extrusion blocks 322 then contact and press the second end. At this time, the plurality of extrusion blocks 322 can also achieve multi-point pressing on the second end to ensure the contact between the second end and the first end.After the adjustment of the pressure welding mechanism 3 is completed, the linear guide 37 and the welding gun 38 are started simultaneously. At this time, the electric slider drives the welding gun 38 to move linearly to weld the weld seam. At the same time, the driving rod 326 also moves synchronously and drives the trapezoidal driving block 327 to slide linearly in the connecting groove 323. Taking the first pressing block 322 as an example, before the welding gun 38 moves to the position of the first pressing block 322, the trapezoidal driving block 327 first contacts the vertical section of the first L-shaped connecting piece 324 and pushes it to move away from the welding gun 38, and the compression spring 325 is also squeezed accordingly. In this way, the first pressing block 322 is driven to shrink into the connecting groove 323 first to avoid the welding gun 38. At this time, the remaining pressing blocks 322 still press on the second end and continue to maintain a certain pressure. The electric slider continues to move. When the welding gun 38 moves beyond the first pressing block 322, the trapezoidal driving block 327 also separates from the L-shaped connecting piece 324. Under the elastic action of the compression spring 325, the first pressing block 322 resets. The electric slider continues to move, so that the plurality of pressing blocks 322 shrink one by one to avoid the welding gun 38 one by one. In this way, by the movement of the welding gun 38, the plurality of pressing blocks 322 shrink into the working groove 321 one by one to avoid the welding gun 38, and the pressure is continuously maintained by the non-shrunk pressing blocks 322. At this time, the pressing blocks 322 can not only ensure the pressure on the second end, but also passively shrink one by one by the movement of the welding gun 38 to avoid contact with the welding gun 38, thereby avoiding the residue of welding slag on the pressing blocks 322 and also avoiding welding between the annular steel plate and the pressing blocks 322.;

[0040] In addition, preferably, to ensure the normal operation of the electric guide rail and avoid the movement of the electric slider being blocked by the hydraulic cylinder 34, a support frame 39 can be provided on the moving mounting plate 32. The support frame 39 is of a U-shaped structure and is connected between the movable end of the hydraulic cylinder 34 and the moving mounting plate 32, and the driving rod 326 can pass below the support frame 39 during movement.

[0041] Furthermore, when the steel plate is bent into an annular steel plate, it is difficult to truly bend it into a circular structure. This is due to the nature of the steel plate itself. After bending, it will rebound to a certain extent, and the rebound amplitude is difficult to control, which will result in different sizes of the welds between the first end and the second end, and different degrees of warping of the second end (but still within a certain range). When the second end is extruded in the vertical direction, the distance moved by the second end is difficult to control, which will also make the lengths of the overlapping parts of the first end and the second end different, which may cause a certain deviation in the diameter of the steel ring after welding. For this reason, this embodiment provides a further solution to solve the above technical problems by extruding block 322 extruding block 322;In this embodiment, it should be noted that the installation position of the extrusion block 322 is different from that of the previous embodiment. A through groove 328 is formed in the side wall of the mating extrusion plate 35. The through groove 328 penetrates through a plurality of working grooves 321. A sliding shaft 329 is slidably installed in the through groove 328. An extrusion block 322 is installed on the sliding shaft 329 through a first torsion spring (not shown in the figure). The first torsion spring is used to maintain the initial state of the extrusion block 322 to ensure the pressure on the second end. It should also be noted that in this embodiment, a stop portion 330 is formed at one end of the extrusion block 322 close to the welding gun 38, and the stop portion 330 is closer to the welding gun 38 than the end of the second end. The stop portion 330 is a square block structure. When the sliding shaft 329 moves in the through groove 328 in a direction away from the welding gun 38, the extrusion block 322 also moves in a direction away from the welding gun 38. In addition, a moving bracket 331 is connected between the two ends of the sliding shaft 329. The moving bracket 331 is slidably arranged outside the moving mounting plate 32. A driving lead screw 332 is rotatably installed at the upper end of the moving mounting plate 32 through a second torsion spring (not shown in the figure). The second torsion spring is used to maintain the initial state of the driving lead screw 332 to facilitate its reset. The moving bracket 331 is threadedly connected to the driving lead screw 332. Preferably, the driving lead screw 332 is arranged on one side of the upper end of the moving mounting plate 32 to avoid blocking the movement of the driving rod 326. A pull rope 333 is also wound around the end of the driving lead screw 332. The pull rope 333 is connected to the fixed fixing plate 31. When the moving mounting plate 32 moves away from the fixing plate 31, the pull rope 333 is pulled and the driving lead screw 332 rotates. In addition, an inclined pressure rod 334 is formed at one end of the extrusion block 322 away from the welding gun 38. The inclined pressure rod 334 is composed of an upwardly inclined upper inclined portion and a horizontal portion connected. The upper inclined portion is connected to the extrusion block 322, and the horizontal portion is formed at one end of the upper inclined portion away from the welding gun 38. The inclined pressure rod 334 and the trapezoidal driving block 327 are arranged in corresponding cooperation. It should be particularly noted that in this embodiment, the trapezoidal driving block 327 is vertically arranged, and one end of the trapezoidal driving block 327 close to its moving direction (when welding) is a slope. A second spring rod 335 is also fixed on the moving mounting plate 32. The second spring rod 335 is used to fix the first end, and the lower end of the second spring rod 335 is a movable end. When the moving mounting plate 32 moves downward, the movable end first contacts the first end and performs preliminary limit on the first end.;

[0042] When the annular steel ring is installed, the first end is moved to a specific position and the annular steel ring is kept stationary (the specific position can be achieved by setting a mark to align the first end with it), and then the movable mounting plate 32 is driven to move downward. During the entire working process, two working strokes are included, namely, a first end fixed stroke, a second end moving stroke and a welding stroke. The two strokes are performed synchronously. During the first end fixed stroke, the movable mounting plate 32 moves downward to drive the second spring rod 335 to contact the upper surface of the first end first, and the movable mounting plate 32 continues to move downward, thereby increasing the pressure on the first end and restricting the first end; during the second end moving stroke, during the downward movement of the movable mounting plate 32 The pull rope 333 is pulled and drives the driving screw 332 to rotate, and the rotation of the driving screw 332 drives the movable bracket 331 to move in the direction away from the welding gun 38. At this time, the sliding shaft 329 also moves in the through groove 328 in the direction away from the welding gun 38, and synchronously drives the extrusion block 322 and the stopper 330 to move in the direction away from the welding gun 38. Obviously, the movement of the extrusion block 322 and the stopper 330 is a combination of horizontal movement and vertical downward movement. The extrusion block 322 and the stopper 330 move obliquely downward as a whole. When the degree of tilting of the second end is unknown, the oblique downward movement of the extrusion block 322 and the stopper 330 can make the stopper 330 contact and stop the end of the second end. The second end is pushed to move obliquely downward, and the movement can be stopped when it moves to the welding position. In this way, for different annular steel plates, when the degree of tilting of the second end is slightly different, the second end can still be driven back to the normal welding position through the extrusion block 322 and the stopper 330, thereby reducing the error in the diameter of the steel ring after welding; during the welding stroke, after the second end moves, the oblique pressure rod 334 also moves into the connecting groove 323. At this time, the linear guide rail 37 and the welding gun 38 are started at the same time, and the electric slider drives the welding gun 38 to move linearly to weld the weld. At the same time, the driving rod 326 also moves synchronously and drives the trapezoidal driving block 327 to move linearly in the connecting groove 323. Sliding, taking the first extrusion block 322 as an example, before the welding gun 38 moves to the position of the first extrusion block 322, the trapezoidal driving block 327 first contacts the first oblique pressure rod 334 and pushes it to rotate, so that the extrusion block 322 and the stopper 330 also rotate accordingly and the stopper 330 rotates away from the second end. At this time, the first torsion spring is working, and the remaining extrusion blocks 322 are still squeezed on the second end, and continue to maintain a certain pressure. The electric slider continues to move. When the welding gun 38 moves beyond the first extrusion block 322, the first extrusion block 322 is reset under the elastic action of the first torsion spring. In this way, the electric slider continues to move, and multiple extrusion blocks 322 can be rotated one by one to avoid the welding gun 38;Through the above technical solution, the extrusion block 322 has three functions. First, it can move obliquely downward to push the second end to the normal welding position to reduce the error of the steel ring diameter. Second, it can apply appropriate pressure to the second end to ensure the welding effect. Third, it can avoid the welding gun 38 one by one to prevent residual welding slag or welding to the steel ring.

[0043] Only some exemplary embodiments of the present invention have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of the claims of the present invention.

Claims

1. A welding device for wheel production, which is used to weld the two ends of a steel plate rolled into a ring, comprising a mounting frame, wherein a ring plate mounting mechanism for clamping the ring steel plate is arranged in the mounting frame, characterized in that: The mounting frame is also provided with a pressure welding mechanism and an arc-shaped top pressure plate, the arc-shaped top pressure plate is used to cooperate with the pressure welding mechanism to extrude the welding position of the annular steel plate, the arc-shaped top pressure plate is provided with a pressure sensor, the pressure sensor is used to detect the real-time pressure of the welding position of the annular steel plate; the pressure welding mechanism controls the extrusion amplitude based on the real-time pressure.

2. A wheel production welding device according to claim 1, characterized in that: The ring plate installation mechanism includes an outer support plate fixed in a mounting frame. A plurality of limiting roller groups are also installed in the mounting frame. The limiting roller groups are used to maintain the state of the ring steel plate during welding.

3. A wheel production welding device according to claim 1, characterized in that: The center of the arc-shaped top pressure plate and the center of the annular steel plate are on the same virtual circle.

4. A wheel production welding device according to claim 1, characterized in that: The pressure welding mechanism includes a fixed plate fixed in a mounting frame, a movable mounting plate is elastically mounted on the fixed plate via a first spring rod, a hydraulic cylinder is also mounted on the top wall of the mounting frame, the movable end of the hydraulic cylinder is connected to the movable mounting plate, a matching extrusion plate is formed on one side of the lower end of the movable mounting plate, and the matching extrusion plate is correspondingly arranged with the arc-shaped top pressure plate.

5. A wheel production welding device according to claim 4, characterized in that: The lower end surface of the matching extrusion plate is arc-shaped.

6. A wheel production welding device according to claim 5, characterized in that: The two ends of the annular steel plate are respectively a first end and a second end, the end of the second end is located above the end of the first end, and the matching extrusion plate is located on a side close to the second end.

7. A wheel production welding device according to claim 6, characterized in that: A through slot is provided on one side of the lower end of the movable mounting plate close to the first end, a linear guide rail is installed on the upper end of the movable mounting plate, an electric slider is slidably installed on the linear guide rail, a welding gun is installed on the electric slider, the welding gun is located in the through slot and the muzzle of the welding gun is inclined.

8. A wheel production welding device according to claim 7, characterized in that: In the initial state, there is a certain distance between the welding gun and the welding position of the annular steel plate in the vertical direction.

9. A wheel production welding device according to claim 7, characterized in that: The width of the through groove is not less than the width of the annular steel plate.

10. A wheel production welding device according to claim 7, characterized in that: The angle between the welding gun and the movable mounting plate is 45 degrees.

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