Automatic plug welding machine for air spring machining

Abstract

The invention relates to the technical field of gas spring processing, in particular to an automatic plug welding machine for gas spring processing, which comprises a welding machine and a rack, the welding machine is provided with a vertically moving welding head, a left clamp and a right clamp are transversely mounted on the rack in a sliding manner, and a processing rod for inserting a gas spring tube body is further mounted on the rack. A guide column rotationally connected with the rack is fixedly installed at the bottom end of the machining rod, a three-gear sliding groove is formed in the peripheral face of the guide column, a transmission rod is slidably installed in the three-gear sliding groove, the transmission rod is fixedly connected with the left clamp or the right clamp, and when the transmission rod is located at the end, close to a welding head, of a three-gear spring, the transmission rod is connected with the left clamp or the right clamp. When the transmission rod is located in the middle of the third-gear sliding groove, the included angle between the machining rod and the welding head is an acute angle, and when the transmission rod is located at the other end of the third-gear sliding groove, the machining rod faces the lower portion of the horizontal plane.

Description

Technical Field

[0001] The present invention relates to the technical field of gas spring processing, and particularly relates to an automatic plug welding machine for gas spring processing. Background Art

[0002] A gas spring is a device that utilizes gas pressure to generate elastic force and is commonly used in fields such as automobiles and furniture. Its key part is the tail, and the firmness of the welding at the tail directly affects the service life and safety of the gas spring. To ensure the sealing and durability of the gas spring, a plug is usually welded to the tail of the gas spring. Welding the plug of the gas spring refers to the process of connecting the end of the gas spring with the plug through a welding process. Generally, an energy storage welding machine is used to weld the tail of the gas spring and the plug. During welding, the plug needs to be manually placed on the welding head by hand, the gas spring is inserted into the processing rod, then the hydraulic system is operated to move the processing rod to be vertically placed directly below the welding head, and then the fixture is operated to clamp and weld the gas spring. After welding, the gas spring is manually withdrawn from the processing rod, and finally a gas spring with a plug is obtained; The existing energy storage welding machine requires manual operations for loading and unloading the gas spring and loading the plug, and the degree of automated production needs to be improved.

[0003] The above information disclosed in the background art section is only used to enhance the understanding of the background of the present disclosure, and thus it may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0004] The purpose of the present invention is to design a welding device that does not require manual insertion of the gas spring tube for loading and extraction for unloading, and can automatically load and unload and move to be directly below the welding head for welding, so as to solve the above deficiencies in the technology.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An automatic plug welding machine for gas spring processing, including a welding machine and a frame. The welding machine has a vertically movable welding head. A left fixture and a right fixture are horizontally slidably installed on the frame. A processing rod for inserting the gas spring tube is also installed on the frame. The bottom end of the processing rod is fixedly installed with a guiding column rotatably connected to the frame. A three - gear sliding groove is provided on the outer peripheral surface of the guiding column, and a transmission rod is slidably installed in the three - gear sliding groove. The transmission rod is fixedly connected to the left fixture or the right fixture. When the transmission rod is located at one end of the three - gear spring close to the welding head, the processing rod is perpendicular to between the left fixture and the right fixture. When the transmission rod is located in the middle of the three - gear sliding groove, the included angle between the processing rod and the welding head is an acute angle. When the transmission rod is located at the other end of the three - gear sliding groove, the processing rod faces below the horizontal plane; Through different distances between the left fixture and the right fixture, the processing rod has three angular forms for welding, loading, and unloading.

[0006] Preferably, the three - stage sliding groove includes a first sliding groove, a second sliding groove, a third sliding groove, a fourth sliding groove and a fifth sliding groove formed on the outer peripheral surface of the guiding column. The first sliding groove, the third sliding groove and the fifth sliding groove are all parallel to the central axis of the guiding column. The two ends of the second sliding groove are respectively communicated with the ends of the first sliding groove and the third sliding groove, and the two ends of the fourth sliding groove are respectively communicated with the two ends of the third sliding groove and the fifth sliding groove. The first sliding groove, the second sliding groove, the third sliding groove, the fourth sliding groove and the fifth sliding groove are all slidably connected with the transmission rod.

[0007] Preferably, the included angle between the first sliding groove and the third sliding groove is an acute angle, and the included angle between the first sliding groove and the fifth sliding groove is an obtuse angle.

[0008] Preferably, the included angle between the first sliding groove and the third sliding groove is 30° - 60°, and the included angle between the first sliding groove and the fifth sliding groove is 120° - 150°.

[0009] Preferably, the first sliding groove, the third sliding groove and the fifth sliding groove have the same length, and the length of the fourth sliding groove is twice the length of the second sliding groove.

[0010] Preferably, when the transmission rod just slides from the first sliding groove into the second sliding groove, the distance between the left clamp and the right clamp is greater than the outer diameter of the air spring tube body.

[0011] Preferably, a feeding device is further installed on the frame. The feeding device includes a conveyor belt assembly and a guiding shell fixedly installed on the frame. The guiding shell is fixedly connected with the conveyor belt assembly. A through - hole is opened at one end of the guiding shell close to the processing rod. When the transmission rod is located in the middle of the three - stage sliding groove, the through - hole coincides with the central axis of the processing rod.

[0012] Preferably, a plurality of equally - spaced convex strips are fixedly installed on the surface of the conveyor belt of the conveyor belt assembly, and there is an air spring tube body between two adjacent convex strips.

[0013] Preferably, the thickness of the side of the guiding shell where the through - hole is opened is 0.1 - 0.2 times the length of the air spring tube body.

[0014] Preferably, a through - groove is opened on the frame. The height of the through - groove is higher than that of the guiding column. When the processing rod drives the air spring tube body to pass through the through - groove, the air spring tube body does not contact the frame. A collection box is also placed at the bottom of the frame.

[0015] In the above technical solution, the technical effects and advantages provided by the present invention are: The present invention drives the processing rod to have three angular forms of welding, loading, and unloading through the clamping and releasing actions of the left fixture and the right fixture in the prior art, so as to realize the automatic loading and unloading of the gas spring tube body and the welding of the plug, without manual picking and placing of the gas spring tube body on the processing rod, optimizing the automation degree of the existing equipment; When the transmission rod is located in the third chute in the present invention, the central axes of the processing rod and the through hole coincide, so that the gas spring tube bodies conveyed in the conveyor belt assembly will automatically slide out of the through hole under the action of gravity and sleeved on the processing rod, without manually inserting the gas spring on the processing rod as in the prior art, reducing the manual labor; At the same time, in the unloading stage of the present invention, the transmission rod drives the guide post to rotate downward, thereby driving the processing rod to rotate downward. When rotating downward, a centrifugal force will be generated, cooperating with the self-gravity of the gas spring tube body on the processing rod, enabling the gas spring tube body with the plug welded to automatically slide off the processing rod and fall into the collection box; The structure of the present invention is relatively simple, without significantly changing the layout and structure of the prior art products, and is easy to directly upgrade and transform on the existing equipment. At the same time, without operating the hydraulic system in the prior art to swing the processing rod, it can be used to assist in loading and unloading, saving the expenditure of the hydraulic system. Description of the Drawings

[0016] 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.

[0017] Figure 1 Schematic diagram of the overall structure of the present invention; Figure 2 Side view of the present invention; Figure 3 Schematic diagram of the left fixture and the right fixture of the present invention in the clamped state; Figure 4 Schematic diagram of the internal structure of the transmission rod of the present invention located in the third chute; Figure 5 Schematic diagram of the internal structure of the transmission rod of the present invention located in the fifth chute; Figure 6 Schematic diagram of the coincidence of the central axes of the through hole and the processing rod of the present invention; Figure 7 Schematic diagram of the connection between the conveyor belt assembly and the convex strip of the present invention; Figure 8 Schematic diagram of the three-speed chute structure on the guide post of the present invention;

[0018] Description of the reference numerals: 1. Welding machine; 2. Frame; 3. Welding head; 4. Left clamp; 5. Right clamp; 6. Processing rod; 7. Guide post; 8. Three-gear chute; 8a. First chute; 8b. Second chute; 8c. Third chute; 8d. Fourth chute; 8e. Fifth chute; 9. Transmission rod; 10. Feeding device; 10a. Conveyor belt assembly; 10b. Guide housing; 10c. Through hole; 10d. Rib; 11. Through groove; 12. Collection box. Detailed implementation manner

[0019] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0020] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the accompanying drawings of the specification and specific implementation manners.

[0021] The present invention provides a Figure 1-8 shown automatic plug welding machine for gas spring processing, including a welding machine 1 and a frame 2 in the prior art. The welding machine 1 has a vertically movable welding head 3. The frame 2 has a left clamp 4 and a right clamp 5 slidably mounted horizontally. The left clamp 4 and the right clamp 5 are driven by a hydraulic cylinder to approach or move away from each other. A guide post 7 is rotatably mounted on the frame 2. A three-gear chute 8 composed of a first chute 8a, a second chute 8b, a third chute 8c, a fourth chute 8d, and a fifth chute 8e is provided on the guide post 7. A transmission rod 9 is slidably connected in the three-gear chute 8. The top of the transmission rod 9 is fixedly connected to the left clamp 4 or the right clamp 5. The first chute 8a, the third chute 8c, and the fifth chute 8e are all parallel to the central axis of the guide post 7. The two ends of the second chute 8b are respectively communicated with the ends of the first chute 8a and the third chute 8c. The two ends of the fourth chute 8d are respectively communicated with the two ends of the third chute 8c and the fifth chute 8e. The included angle between the first chute 8a and the third chute 8c is 30° - 60°. The included angle between the first chute 8a and the fifth chute 8e is 120° - 150°. In this way, it can be ensured that when the transmission rod 9 is located in the third chute 8c, the processing rod 6 extends obliquely upward, and when the transmission rod 9 is located in the fifth chute 8e, the processing rod 6 extends obliquely downward, which is convenient for automatic loading and unloading. An upper feeding device 10 composed of a belt drive assembly and a guide housing 10b is also installed on the frame 2. A through hole 10c is opened at one end of the guide housing 10b close to the processing rod 6. In order to ensure that the through hole 10c plays a guiding role, the thickness of the through hole 10c is 0.1 - 0.2 times the length of the air spring tube body. When the transmission rod 9 is located in the middle of the three-speed chute 8, the through hole 10c coincides with the central axis of the processing rod 6. In order to ensure the movement of the unprocessed air spring tube body in the belt drive assembly 10a, a plurality of equally spaced convex strips 10d are fixedly installed on the surface of the conveyor belt of the belt drive assembly 10a. There is an air spring tube body between two convex strips 10d. And for the convenience of blanking, a through groove 11 is opened on the frame 2. The height of the through groove 11 is higher than that of the guide post 7. When the processing rod 6 drives the air spring tube body to pass through the through groove 11, the air spring tube body does not come into contact with the frame 2. A collection box 12 is also placed at the bottom of the frame 2; Working steps of this equipment: Upper feeding step: At this time, the transmission rod 9 is in the third chute 8c. The hydraulic cylinder pauses to drive the left clamp 4 and the right clamp 5 to approach each other. At this time, the guide post 7 drives the processing rod 6 to extend obliquely upward towards the through hole 10c. The belt drive assembly moves for a predetermined time, so that the air spring tube body between two convex strips 10d moves to the end of the guide housing 10b. This air spring tube body will slide through the through hole 10c under the action of gravity and then be sleeved on the processing rod 6; Welding step: The user places the plug on the welding head 3 as in the prior art. Then the output shaft of the hydraulic cylinder continues to extend, so that the transmission rod 9 slides from the third chute 8c to the second chute 8b. At this time, the guide post 7 will drive the processing rod 6 to rotate downward below the welding head 3. When the transmission rod 9 slides from the second chute 8b to the first chute 8a, the distance between the left clamp 4 and the right clamp 5 is greater than the outer diameter of the air spring tube body to prevent the left clamp 4 and the right clamp 5 from colliding with the air spring tube body. Then the hydraulic cylinder drives the left clamp 4 and the right clamp 5 to clamp the air spring tube body, and the welding head 3 welds the plug to the tail of the air spring tube body according to the prior art; Blanking step: The left clamp 4 and the right clamp 5 move away from each other. When the distance between the left clamp 4 and the right clamp 5 is greater than the outer diameter of the air spring tube body, the transmission rod 9 slides from the first chute 8a into the second chute 8b. Since the second chute 8b is inclined, the guide post 7 will rotate under the cooperation of the second chute 8b and the transmission rod 9, so that the processing rod 6 drives the welded air spring out between the left clamp 4 and the right clamp 5. Then the transmission rod 9 will enter the third chute 8c from the second chute 8b. When entering the fourth chute 8d from the third chute 8c, it will gradually drive the processing rod 6 towards the lower oblique direction. When the transmission rod 9 enters the fifth chute 8e, the processing rod 6 is at 30° - 60°, preferably 45° towards the lower oblique direction. In this way, the air spring tube body with the plug welded on the processing rod 6 will, under the action of gravity, pass through the through groove 11 from the processing rod 6 and enter the collection box 12; Reset steps: The hydraulic cylinder drives the left fixture 4 and the right fixture 5 to approach each other, causing the transmission rod 9 to slide from the fifth chute 8e into the third chute 8c, and repeating the above steps again.

[0022] Importantly, it should be noted that the construction and arrangement of the present application shown in multiple different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those skilled in the art who refer to this disclosure should readily understand that many modifications are possible without materially departing from the novel teachings and advantages of the subject matter described in this application (e.g., variations in the dimensions, scales, structures, shapes and proportions of various elements, as well as parameter values (such as temperature, pressure, etc.), installation arrangements, use of materials, colors, orientations, etc.).

Claims

1. An automatic welding machine for plugging gas springs, comprising a welding machine (1) and a frame (2), the welding machine (1) having a welding head (3) that moves vertically, the frame (2) having a left clamp (4) and a right clamp (5) that are laterally slidably mounted, and the frame (2) also having a processing rod (6) that is inserted into a gas spring tube body, characterized in that: A guide column (7) rotatably connected to the frame (2) is fixedly installed at the bottom end of the processing rod (6), and a three-stage slide groove (8) is opened on the outer peripheral surface of the guide column (7). A transmission rod (9) is slidably installed in the three-stage slide groove (8), and the transmission rod (9) is fixedly connected to the left clamp (4) or the right clamp (5). When the transmission rod (9) is located at one end of the three-stage spring close to the welding head (3), the processing rod (6) is perpendicular to the left clamp (4) and the right clamp (5). When the transmission rod (9) is located in the middle of the three-stage slide groove (8), the angle between the processing rod (6) and the welding head (3) is an acute angle. When the transmission rod (9) is located at the other end of the three-stage slide groove (8), the processing rod (6) faces below the horizontal plane. By means of different spacings between the left clamp (4) and the right clamp (5), the processing rod (6) has three angles for welding, loading and unloading.

2. The automatic plug welding machine for gas spring processing according to claim 1 is characterized in that: The three-speed slide groove (8) includes a first slide groove (8a), a second slide groove (8b), a third slide groove (8c), a fourth slide groove (8d) and a fifth slide groove (8e) which are provided on the outer peripheral surface of the guide column (7); the first slide groove (8a), the third slide groove (8c) and the fifth slide groove (8e) are all parallel to the central axis of the guide column (7); two ends of the second slide groove (8b) are respectively connected to the ends of the first slide groove (8a) and the third slide groove (8c); two ends of the fourth slide groove (8d) are respectively connected to the ends of the third slide groove (8c) and the fifth slide groove (8e); the first slide groove (8a), the second slide groove (8b), the third slide groove (8c), the fourth slide groove (8d) and the fifth slide groove (8e) are all slidably connected to the transmission rod (9).

3. The automatic plug welding machine for gas spring processing according to claim 2 is characterized in that: The included angle between the first slide groove (8a) and the third slide groove (8c) is an acute angle, and the included angle between the first slide groove (8a) and the fifth slide groove (8e) is an obtuse angle.

4. The automatic plug welding machine for gas spring processing according to claim 2 is characterized in that: The included angle between the first slide groove (8a) and the third slide groove (8c) is 30°-60°, and the included angle between the first slide groove (8a) and the fifth slide groove (8e) is 120°-150°.

5. The automatic plug welding machine for gas spring processing according to claim 2 is characterized in that: The first slide groove (8a), the third slide groove (8c) and the fifth slide groove (8e) have the same length, and the length of the fourth slide groove (8d) is twice the length of the second slide groove (8b).

6. The automatic plug welding machine for gas spring processing according to claim 2 is characterized in that: When the transmission rod (9) just slides from the first sliding groove (8a) to the second sliding groove (8b), the distance between the left clamp (4) and the right clamp (5) is greater than the outer diameter of the gas spring tube body.

7. The automatic plug welding machine for gas spring processing according to claim 1 is characterized in that: The frame (2) is also provided with a loading device (10), the loading device (10) comprising a conveyor belt assembly and a guide shell (10b) fixedly mounted on the frame (2), the guide shell (10b) and the transmission belt assembly (10a) being fixedly connected, a through hole (10c) being formed at one end of the guide shell (10b) close to the processing rod (6), and when the transmission rod (9) is located in the middle of the third-gear slide groove (8), the through hole (10c) coincides with the central axis of the processing rod (6).

8. The automatic plug welding machine for gas spring processing according to claim 7 is characterized in that: A plurality of equidistantly distributed convex strips (10d) are fixedly mounted on the conveyor belt surface of the transmission belt assembly (10a), and a gas spring tube body is provided between two convex strips (10d).

9. The automatic plug welding machine for gas spring processing according to claim 7 is characterized in that: The thickness of the side of the guide shell (10b) having the through hole (10c) is 0.1-0.2 times the length of the gas spring tube body.

10. The automatic plug welding machine for gas spring processing according to claim 1, characterized in that: The frame (2) is provided with a through groove (11), the height of the through groove (11) is higher than the guide column (7), and when the processing rod (6) drives the gas spring tube body to pass through the through groove (11), the gas spring tube body does not come into contact with the frame (2), and a collection frame (12) is also placed at the bottom of the frame (2).

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