Annular body weld joint intelligent welding unit and conveying device

Abstract

The invention discloses an annular body weld joint intelligent welding unit and a conveying device, and belongs to the technical field of welding devices, and the annular body weld joint intelligent welding unit comprises a frame body, a welding gun, a plurality of limiting shafts, a positioning column, a positioning pin and other key components. And a welding position is arranged in the frame body. The multiple limiting shafts jointly define a circular area tangent to the annular body, one limiting shaft can rotate to drive the annular body to rotate, and welding seam positioning is facilitated. The positioning pin can be accurately embedded into a welding seam for positioning when the annular body rotates, and manual intervention is not needed. After welding is completed, the positioning pin reversely slides to the opposite side of the welding seam, two sides of the welding seam are in tight butt joint in cooperation with pressure of the limiting shaft, and follow-up welding is facilitated. In addition, the welding unit is further integrated with a conveying device, the conveying device is connected with the conveying line through the penetrating channel, automatic conveying and welding of the annular body are achieved, and the production efficiency is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of welding devices, and in particular to an intelligent welding unit for annular welds and a conveying device. Background Art

[0002] In the vehicle manufacturing and processing industries, annular components such as wheel hubs are common. Traditionally, these annular components are made by bending long strips of metal sheets and then butting the two ends together in preparation for welding. This process is particularly tedious and mainly includes two key steps: first, manual positioning of the weld seam, which requires workers to accurately find and mark the exact location where the two ends of the sheet will butt together for subsequent welding; second, because metal sheets tend to maintain a certain outward expansion force after bending, manual force must be applied before welding to tightly squeeze the butt weld area together to ensure that the weld is as small as possible, thereby improving the welding quality and strength.

[0003] This manual welding method not only increases labor costs but also significantly reduces production efficiency. Workers need to spend a lot of time finding and squeezing the weld seam. At the same time, human factors may also affect the accuracy of the weld, thereby affecting the quality of the product. Summary of the Invention

[0004] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide an intelligent welding unit and conveying device for annular welds, which can realize automatic positioning of the welds.

[0005] To solve the above technical problems, the present invention adopts the following technical solution: The present invention provides an annular body weld intelligent welding unit, comprising: A frame, wherein a welding position is provided inside the frame; A welding gun, which is mounted on the frame and capable of welding the weld seam of the annular body at the welding position; A plurality of limiting shafts, each of which is slidably mounted inside the frame, wherein the plurality of limiting shafts can jointly define a circular area tangent to the outer edges of the plurality of limiting shafts at the welding position, and wherein the sliding directions of the plurality of limiting shafts are all toward the center point of the circular area; A positioning post is slidably mounted inside the frame, and the sliding direction of the positioning post is along the axis of the circular area, the axis of the positioning post coincides with the axis of the circular area, a positioning pin is provided inside the positioning post, and the positioning pin is radially slidably mounted inside the positioning post along a direction perpendicular to the axis of the positioning post, the positioning pin includes a positioning end, the positioning end can be pressed against the inner annular surface of the annular body, and when the positioning end moves to the weld position of the annular body, the positioning end can be embedded and pressed into the weld; Wherein, the end of the positioning pin away from the positioning end is a pressing end. When the pressing end presses against the annular body, the weld is in a closed state.

[0006] Preferably, the end of the welding gun, the positioning end of the positioning pin and the pressing end can jointly form a vertical limiting surface, and the number of the limiting axes is four, of which two limiting axes are symmetrically arranged on one side of the positioning end with the limiting surface as the symmetry plane, and the other two limiting axes are symmetrically arranged on one side of the pressing end with the limiting surface as the symmetry plane, and any one of the limiting axes has a rotation function.

[0007] Preferably, an inner pin is slidably installed inside the locating end of the locating pin, and the inner pin is slidably installed inside the locating pin through an elastic body, and the end of the inner pin is embedded in a freely rotatable sphere.

[0008] Preferably, the pressing end of the positioning pin is an arc surface, and the material of the arc portion is rubber.

[0009] Preferably, a gear is rotatably mounted inside the positioning column, and teeth are provided on a side of the positioning pin close to the gear, and the gear meshes with the teeth on the positioning pin.

[0010] Preferably, four pushing cylinders are fixed inside the frame, and the four limiting shafts are rotatably mounted on the output ends of the four pushing cylinders respectively.

[0011] Preferably, a stand is fixed on the frame, and a support block for supporting a welding gun is slidably mounted inside the stand.

[0012] A conveying device comprises the above-mentioned welding unit, wherein a through channel is opened inside the frame, and the width of the through channel is greater than the diameter of the annular body.

[0013] Preferably, the conveying device further comprises a conveying line for conveying the annular body, and the conveying line passes through a through channel on the frame.

[0014] The beneficial effects of the present invention are: The present invention configures multiple sets of limiting shafts at the welding station, including a rotatable limiting shaft, which not only securely clamps the annular body but also drives it to rotate automatically. During the annular body's rotation, built-in inner pins accurately identify and locate the weld seam, improving welding efficiency.

[0015] The present invention also utilizes a reverse sliding mechanism for the locating pin, enabling it to accurately move to the opposite side of the weld. The balanced pressure from the two limiting shafts ensures a tight fit between the two sides of the weld, resulting in a butt joint. This automatic butt joint function simplifies pre-weld preparation and significantly improves the overall quality and efficiency of the weld. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of the welding unit.

[0017] Figure 2 This is a cross-sectional view of the interior of the frame.

[0018] Figure 3 For the present invention Figure 2 A in the enlarged view.

[0019] Figure 4 It is a side view of the frame of the present invention.

[0020] Figure 5 It is a structural schematic diagram of the conveying device of the present invention.

[0021] Figure 6 Schematic diagram of the structure of the positioning column of the present invention.

[0022] In the figure: 1. frame, 2. welding gun, 3. limit shaft, 4. positioning column, 5. positioning pin, 6. inner pin, 7. gear, 8. stand. DETAILED DESCRIPTION

[0023] The present invention is described below with specific examples, but is not intended to be limiting of the invention.

[0024] Example 1 like Figures 1-4 As shown, in this embodiment, an annular body weld seam intelligent welding unit is provided, which includes a frame 1, multiple limiting shafts 3, positioning columns 4 and a welding gun 2.

[0025] The interior of the frame 1 features a welding station, an area specifically designed for welding the annular object. This welding unit works in conjunction with other components, such as an automated conveyor system for the annular object. When the conveyor system precisely transports the annular object to a predetermined welding station within the welding unit, the welding unit activates and welds the annular object at that station, achieving a precise welding process.

[0026] Multiple limit shafts 3 are slidably mounted inside the frame 1. Multiple limit shafts 3 can jointly define a circular area tangent to the outer edges of these limit shafts 3 at the welding position, and the sliding directions of multiple limit shafts 3 are all toward the center point of this circular area. The design of multiple limit shafts 3 allows them to converge toward the center or expand outward synchronously and at the same distance. This movement method ensures that the center point position remains fixed, and only the diameter of the circular area formed around the center point is changed. This mechanism is designed to flexibly adapt to annular bodies of different sizes. When the annular body is placed in the circular area and its outer diameter coincides with the diameter of the circular area, multiple limit shafts 3 will automatically fit and slightly rest on the outer edge of the annular body, thereby achieving inward regularization of the outward-expanding or irregularly shaped annular body, making its shape closer to a perfect circle, to facilitate subsequent welding work.

[0027] The positioning column 4 is slidably mounted inside the frame 1, and the sliding direction of the positioning column 4 is along the axis of the circular area. A cylinder for driving the positioning column 4 to slide is fixed on the frame 1. The output end of the cylinder passes through the upper side wall of the frame 1 and is fixed to the upper end of the positioning column 4. The cylinder can control the up and down sliding distance of the positioning column 4. The axis of the positioning column 4 coincides with the axis of the circular area. Figure 1 and Figure 2 As shown, the annular body is precisely transported to the welding position via horizontal transport. As the annular body gradually enters the welding position, the positioning post 4 will slide to the top of the welding position in a timely manner. This operation ensures that the annular body will not make unnecessary contact or collision with the positioning post 4 and any components mounted thereon during movement and positioning, thereby ensuring that the annular body is accurately positioned, creating favorable conditions for subsequent welding operations. A positioning pin 5 is provided inside the positioning post 4. The positioning pin 5 is radially slidably installed inside the positioning post 4 in a direction perpendicular to the axis of the positioning post 4. A sliding hole is designed inside the positioning post 4. This structure is specifically designed for the smooth sliding of the positioning pin 5. The positioning pin 5 is placed horizontally in the middle of the positioning post 4. When the positioning column 4 slides downward as needed until it is partially embedded in the interior of the annular body, the positioning pin 5 is also located exactly in the middle position of the annular body. The positioning pin 5 includes a positioning end, which can be pressed against the inner ring surface of the annular body, and when the positioning end moves to the weld position of the annular body, the positioning end can be embedded in the weld. When the positioning end is against the inner wall of the annular body, the annular body will rotate. When the weld on the annular body rotates to coincide with the positioning end, the positioning end will be stuck in the weld, making it impossible for the annular body to continue rotating.

[0028] Among them, the end of the positioning pin 5 away from the positioning end is the pressing end, the positioning end and the pressing end are the two ends of the positioning pin 5, and only one end of the positioning pin 5 can be pressed on the annular body. When the pressing end is pressed on the annular body, the positioning end is away from the weld. When the pressing end is pressed on the annular body, the weld is in a closed state. The closed state of the weld is the best state for welding the annular body, and the weld can be welded by using the welding gun 2.

[0029] The welding gun 2 is mounted on the frame 1 , with the welding end of the welding gun 2 facing the positioning pin 5 . The end of the welding gun 2 can slide along a vertical line, which is the weld seam of the annular body.

[0030] Example 2 like Figures 1-6 As shown, based on the first embodiment, this embodiment provides a welding method for an annular body, which is as follows: The end of the welding gun 2, the positioning end of the positioning pin 5, and the pressing end together form a vertical limiting surface. There are four limiting shafts 3, and the combined pressure of the four limiting shafts 3 makes it easier for the annular body to form a circle. Two limiting shafts 3 are symmetrically arranged on one side of the positioning end, with the limiting surface as the plane of symmetry. The weld seam is essentially a notch in the annular body, and the presence of this notch makes the annular body prone to slight deformation when subjected to force. When the positioning end contacts the weld seam, the two limiting shafts 3 are symmetrically arranged on both sides. These two limiting shafts 3 can precisely adjust the force applied to the annular body, effectively correcting the deformation caused by the weld seam, thereby significantly reducing the negative impact of the weld seam on the overall structure and performance of the annular body. The other two limiting shafts 3 are symmetrically arranged on one side of the pressing end, with the limiting surface as the plane of symmetry. Any one of the limiting shafts 3 has a rotational function. The limiting shafts 3 are made of rubber, and friction exists between the limiting shafts 3 and the annular body. When the limiting shafts 3 rotate, they can synchronously drive the annular body to rotate.

[0031] An inner pin 6 is slidably installed inside the positioning end of the positioning pin 5. The inner pin 6 is slidably installed inside the positioning pin 5 through an elastomer. The cooperation between the inner pin 6 and the elastomer ensures that when the positioning end is in close contact with the annular body, the inner pin 6 can continue to be subjected to a stable pressing force. This pressing force mechanism allows the end of the inner pin 6 to be in close and fitting contact with the inner ring surface of the annular body. The end of the inner pin 6 is embedded in a sphere that can rotate freely. The sphere is tightly attached to the inner ring surface of the annular body, achieving rolling contact with the annular body. Compared with a sliding connection, this rolling connection significantly reduces the friction between the contact surfaces, thereby effectively preventing scratches on the surface of the annular body that may be caused by excessive friction.

[0032] The pressing end of the positioning pin 5 is an arc surface, and the material of the arc portion is rubber. Due to its inherent properties, the rubber material can ensure sufficient friction between the ring body and the ring body. This property can effectively prevent the ring body from unnecessary displacement when the pressing end applies force to the ring body.

[0033] Gear 7 is rotatably mounted inside positioning column 4. Positioning pin 5 has teeth on the side of gear 7 that mesh with the teeth on positioning pin 5. A motor is integrated within positioning column 4 to drive the rotation of gear 7. When the motor is activated, gear 7 begins to rotate, and this rotational motion causes positioning pin 5 to slide within positioning column 4. This design enables precise control of power transmission and mechanical motion.

[0034] Four pushing cylinders are fixed inside the frame 1, and four limit shafts 3 are rotatably installed on the output ends of the four pushing cylinders. The output ends of the pushing cylinders face the center of the welding position. When the pushing cylinders are oil cylinders, the four pushing cylinders are connected to the oil tank outside the welding unit through oil pipes. The oil inlet and return of the oil tank can synchronously control the extension and shortening of the output ends of the pushing cylinders.

[0035] A stand 8 is fixed on the frame 1, and a support block for supporting the welding gun 2 is slidably installed inside the stand 8. The position where the stand 8 is installed on the frame 1 is a vertical notch, and the stand 8 is installed at the vertical notch.

[0036] Example 3 like Figures 1-6 As shown, based on the first and second embodiments, this embodiment provides a conveying device, which is specifically as follows: Including the above-mentioned welding unit, a through channel is opened inside the frame 1, and the width of the through channel is greater than the diameter of the annular body.

[0037] The conveying device also includes a conveying line for conveying the annular body. The conveying line passes through the through channel on the frame 1 and passes through the bottom of the through channel. It can convey the annular body to the processing position, and the welding unit welds the annular body. The conveying line includes rollers arranged at both ends and a conveyor belt mounted on the rollers. The conveyor belt passes through the bottom of the welding position.

[0038] Working principle: The present invention integrates a conveyor and welding device to achieve an automated welding process. During this process, the conveyor first precisely transports the annular body to the predetermined welding position within the frame 1 and initially clamps the annular body using multiple limit shafts 3. In this state, the weld seam of the annular body is in an unclosed, preparatory state, facilitating subsequent operations.

[0039] Next, the positioning post 4 smoothly slides into the annular body's inner cavity, with the positioning pin 5 resting against the annular body's inner surface. Subsequently, by driving one of the limiting shafts 3 to rotate, its inner pin 6 always adheres to and acts on the inner surface of the annular body, generating a continuous driving force. This thrust not only causes the annular body to rotate, but also guides the weld seam to the tip of the inner pin 6, which now precisely embeds the weld seam, achieving precise positioning of the weld seam.

[0040] Once the weld is accurately positioned, welding can begin. After welding is complete, the system drives the positioning pin 5 in the opposite direction through the reverse rotation of gear 7, causing it to slide and abut against the inner surface of the annular body, this time precisely positioned opposite the weld. Simultaneously, the symmetrically arranged limit shafts 3 exert balanced inward pressure on the annular body. This design not only stabilizes the annular body's position but also ensures a tight fit between the two sides of the weld. Finally, after precise alignment, the welding gun 2 completes the final welding process, ensuring a high-quality weld connection.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. An intelligent welding unit for annular welds, characterized in that: include: A frame (1), wherein a welding position is provided inside the frame (1); A welding gun (2), the welding gun (2) being mounted on the frame (1) and capable of welding the weld seam of the annular body at the welding position; A plurality of limiting shafts (3), wherein the plurality of limiting shafts (3) are all slidably mounted inside the frame (1), and the plurality of limiting shafts (3) can jointly define a circular area tangent to the outer edges of the plurality of limiting shafts (3) at the welding position, and the sliding directions of the plurality of limiting shafts (3) are all toward the center point of the circular area; A positioning column (4), wherein the positioning column (4) is slidably mounted inside the frame (1), and the sliding direction of the positioning column (4) is along the axis of the circular area, the axis of the positioning column (4) coincides with the axis of the circular area, a positioning pin (5) is provided inside the positioning column (4), and the positioning pin (5) is radially slidably mounted inside the positioning column (4) along a direction perpendicular to the axis of the positioning column (4), and the positioning pin (5) includes a positioning end, the positioning end can be pressed against the inner annular surface of the annular body, and when the positioning end moves to the weld position of the annular body, the positioning end can be pressed into the weld; Wherein, the end of the positioning pin (5) away from the positioning end is a pressing end, and when the pressing end presses against the annular body, the weld is in a closed state.

2. The annular body weld intelligent welding unit according to claim 1, characterized in that: The end of the welding gun (2), the positioning end of the positioning pin (5), and the pressing end can jointly form a vertical limiting surface. The number of the limiting shafts (3) is four, two of which are symmetrically arranged on one side of the positioning end with the limiting surface as a symmetric plane, and the other two limiting shafts (3) are symmetrically arranged on one side of the pressing end with the limiting surface as a symmetric plane, and any one of the limiting shafts (3) has a rotation function.

3. The intelligent welding unit for annular weld seams according to claim 1, characterized in that: An inner pin (6) is slidably mounted inside the positioning end of the positioning pin (5), and the inner pin (6) is slidably mounted inside the positioning pin (5) via an elastic body, and the end of the inner pin (6) is embedded in a freely rotatable sphere.

4. The annular body weld intelligent welding unit according to claim 3, characterized in that: The pressing end of the positioning pin (5) is an arc surface, and the material of the arc portion is rubber.

5. The annular body weld intelligent welding unit according to claim 1, characterized in that: A gear (7) is rotatably mounted inside the positioning column (4), and teeth are provided on a side of the positioning pin (5) close to the gear (7), and the gear (7) meshes with the teeth on the positioning pin (5).

6. The annular body weld intelligent welding unit according to claim 2, characterized in that: Four pushing cylinders are fixed inside the frame (1), and the four limiting shafts (3) are rotatably mounted on the output ends of the four pushing cylinders respectively.

7. The annular body weld intelligent welding unit according to claim 1, characterized in that: A stand (8) is fixed on the frame (1), and a support block for supporting the welding gun (2) is slidably mounted inside the stand (8).

8. A conveying device, characterized in that: Comprising the welding unit according to any one of claims 1 to 7, a through channel is provided inside the frame (1), and the width of the through channel is greater than the diameter of the annular body.

9. The conveying device according to claim 8, characterized in that The conveying device also includes a conveying line for conveying the annular body, and the conveying line passes through a through channel on the frame (1).

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