Silencer tank spot welding machine

Abstract

This utility model relates to a spot welding machine for silencer tanks, including a base, a mold core, clamping blocks, and a welding gun. The base is equipped with a working platform and a support plate. The mold core includes a positioning shaft and a mandrel sleeved on the positioning shaft. The mandrel is replaceable. One end of the positioning shaft is fixed to the support plate, while the other end is away from the support plate and supported by a telescopic arm pre-installed on the base. Two clamping blocks are respectively located on the left and right sides of the mold core. After the rolled profile is sleeved onto the mold core, the two clamping blocks press the profile from both sides, making the profile tightly adhere to the mold core and the sealing edges of the profile joined together. The welding gun is located on the upper side of the mold core and supported by a movable self-adaptive lifting system, allowing the welding gun to move along the axial direction of the mandrel and press down to spot weld the sealing edges of the profile. This utility model is suitable for processing tanks of different sizes; only the mandrel needs to be replaced. It is a multi-purpose machine with strong practicality and effectively reduces investment costs.

Description

Technical Field

[0001] This utility model relates to the field of silencer manufacturing technology, and in particular to welding equipment for welding silencer tanks. Background Technology

[0002] Silencers mainly use the appropriate combination of cavity and tube to reduce noise. The outer tank of a tank silencer is usually formed by rolling sheet material into shape. In order to shape the rolled profile, some machines add welding units to the rolling equipment to spot weld the rolled profile into shape. However, this increases the structural complexity of the rolling equipment, and the outer diameter of the tank that each rolling machine can process is fixed. Different equipment is needed to process tanks of different sizes. In this case, welding units are added to each rolling machine, resulting in high investment costs. Summary of the Invention

[0003] The purpose of this utility model is to provide a spot welding machine for silencer tanks, which is suitable for processing tanks of different sizes, and is multi-functional and highly practical.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A silencer tank spot welding machine includes a base and a mold core, clamping blocks, and a welding gun mounted on the base. The base has a working platform and a support plate, which is sideways and located on one side of the working platform. The mold core includes a positioning shaft and a mandrel sleeved on the positioning shaft. The mandrel is replaceable. One end of the positioning shaft is fixed to the support plate, while the other end is away from the support plate and supported by a telescopic arm pre-set on the base. The telescopic arm also simultaneously restricts the axial displacement of the corresponding end of the mandrel. There are two clamping blocks, which are respectively located on the left and right sides of the mold core. After the rolled profile is sleeved on the mold core, the two clamping blocks press the profile from both sides, making the profile fit tightly against the mold core and the sealing edge of the profile join together. The welding gun is located on the upper side of the mold core and is supported by a movable self-adaptive lifting system, allowing the welding gun to move along the axial direction of the mandrel and press down to spot weld the sealing edge of the profile.

[0005] A further improvement of the above scheme is that the inner side of the support plate is provided with a positioning template, which is replaceable and can move along the axial direction of the mandrel. The positioning template is provided with a positioning hole, which is adapted to position the mandrel. The replacement of the positioning template is matched with the mandrel.

[0006] The above solution is further described as follows: the telescopic arm is Y-shaped, with a U-shaped groove at the fork end of the telescopic arm, and the other end of the telescopic arm is fixed on a pre-set slide on the machine base. The slide is mounted on the work platform and is driven by the first cylinder to reciprocate, causing the telescopic arm to extend and retract. The extension and retraction direction of the telescopic arm is perpendicular to the axial direction of the positioning shaft. The U-shaped groove is adapted to engage with the corresponding end of the positioning shaft.

[0007] The above solution is further described in that the two clamping blocks are respectively mounted on the working platform via linear guide rails, and each clamping block is connected to a second cylinder. The second cylinder drives the clamping block to move closer to or away from the mold core. The clamping block has an arc-shaped part that is adapted to contact the profile.

[0008] The above-mentioned solution further includes a third cylinder, a lifting seat, and an adaptive floating connecting column. The welding gun is fixed on the lifting seat. The third cylinder is fixed on a movable truss and is suspended vertically. The movable truss is installed on the machine base and can move along the axial direction of the mandrel through drive control. The telescopic end of the third cylinder faces downward and is connected to the lifting seat through the adaptive floating connecting column. The adaptive floating connecting column is positioned on the machine base, so that the lifting seat can adaptively adjust its lifting and lowering to match different mandrel outer diameters through the adaptive floating connecting column, allowing the welding gun to perform spot welding.

[0009] The above solution is further described in that the positioning template is connected to the integrated seat via a connecting rod, and the integrated seat and the positioning template are respectively set on both sides of the support plate, while the connecting rod passes through a pre-set guide hole on the support plate; the integrated seat is connected to a fourth cylinder, so that the fourth cylinder drives the integrated seat to move the positioning template along the axial direction of the mandrel; the positioning template and the connecting rod are locked together by detachable bolts.

[0010] This utility model discloses a spot welding machine for silencer tanks, comprising a base and a mold core, clamping blocks, and a welding gun mounted on the base. The mold core includes a positioning shaft and a mandrel sleeved on the positioning shaft. The mandrel is replaceable to accommodate welding of profiles of different sizes after rolling. Two clamping blocks press the profile from both sides, ensuring the profile is tightly against the mold core and the sealing edges of the profile are joined together, guaranteeing profile stability and welding quality. The welding gun is supported by a movable self-adaptive lifting system, allowing it to move along the axial direction of the mandrel and press down on the sealing edges of the profile for spot welding, achieving spot welding within a certain length range. This utility model is suitable for processing tanks of different sizes, such as 4-inch, 4.5-inch, 5-inch, and 6-inch silencer tanks. Only the mandrel needs to be replaced, making it a versatile and practical machine that effectively reduces investment costs. Attached Figure Description

[0011] Appendix Figure 1 This is a schematic diagram of a preferred embodiment of the present invention; Appendix Figure 2 for Figure 1 A magnified schematic diagram of a local structure; Appendix Figure 3 for Figure 1 Another perspective structural diagram of the embodiment; Appendix Figure 4 for Figure 3 A magnified schematic diagram of a local structure; Appendix Figure 5 for Figure 1 Schematic diagram of the core rod replacement implementation in the embodiment; Appendix Figure 6 for Figure 5 A magnified schematic diagram of a local structure. Detailed Implementation

[0012] The following will further explain the concept, specific structure and technical effects of the utility model in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of the utility model.

[0013] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These terms are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0014] See Figure 1 , 2 Figures 3, 4, 5, and 6 are schematic diagrams of a preferred embodiment of this utility model. This utility model relates to a muffler tank spot welding machine, used to spot weld and seal the rolled profile to obtain the corresponding muffler tank, which is matched with the subsequent muffler assembly and manufacturing. The muffler mentioned here is mainly used on locomotives, such as lawnmowers. The muffler can be installed at the front or rear of the locomotive and connected to the corresponding exhaust gas treatment system through an external duct of the air intake system. This allows the exhaust gas of the locomotive to be introduced into the muffler, where it is silencing and reducing noise before being discharged, thereby reducing noise pollution.

[0015] The silencer tank spot welding machine of this utility model includes a base 1 and a mold core 2, a clamping block 3, and a welding gun 4 disposed on the base 1. The base 1 is horizontal and has a working platform 11 and a support plate 12. The support plate 12 is sideways and located on one side of the working platform 11. The mold core 2 includes a positioning shaft 21 and a mandrel 22 sleeved on the positioning shaft. The mandrel 22 is replaceable, making it easy to replace and match silencer tanks of different sizes. One end of the positioning shaft 21 is fixed to the support plate 12, and the other end of the positioning shaft 21 is away from the support plate and supported by a telescopic arm 13 pre-set on the base 1. The positioning shaft 21 is cantilevered at a certain height relative to the working platform 11, providing a reference and support, and facilitating the replacement of the mandrel 22. The telescopic arm 13 supports the positioning shaft 21, ensuring its operational stability. Simultaneously, the telescopic arm 13 restricts the axial displacement of the corresponding end of the mandrel 22, preventing it from exiting the positioning shaft 21. Two clamping blocks 3 are respectively positioned on the left and right sides of the mold core 2. After the rolled profile is fitted onto the mold core 2, the two clamping blocks 3 press against the profile from both sides, ensuring the profile is tightly against the mold core 2 and that the sealing edges of the profile are joined together. The welding gun 4 is positioned on the upper side of the mold core 2 and supported by a movable self-adaptive lifting system, allowing the welding gun 4 to move axially along the mandrel and press down to spot weld the sealing edges of the profile.

[0016] This invention can be used with pre-rolled profiles produced by different rolling equipment for welding processing. Only the mandrel needs to be changed to process tanks of different sizes, such as 4-inch, 4.5-inch, 5-inch, and 6-inch silencer tanks. It is multi-functional, highly practical, and effectively reduces investment costs. In use, the pre-rolled profile is fitted onto the mold core 2, which provides internal shaping support. Then, the telescopic arm 13 supports the corresponding end of the positioning shaft 21. Two clamping blocks 3 press the profile from both sides, making the profile tightly adhere to the mold core 2 and joining the sealing edges together. Subsequently, the welding gun 4 presses down to spot weld the sealing edges of the profile and can move along the axial direction of the mandrel to meet the spot welding length, which is set according to actual needs. After spot welding, the telescopic arm 13 retracts from the support, and the welded profile can be pulled out from the mold core 2, which is the silencer tank. This process can be repeated cyclically.

[0017] In this embodiment, a positioning template 14 is provided on the inner side of the support plate 12. The positioning template 14 is replaceable and can move along the axial direction of the mandrel. The positioning template 14 is provided with a positioning hole 141, which is adapted to position the mandrel 22. The size of the positioning hole 141 matches the outer diameter of the mandrel 22. When changing different mandrels, the corresponding positioning template 14 is replaced accordingly. In this embodiment, there is a corresponding shelf on the machine base for storing spare mandrels 22 and positioning templates 14, which facilitates quick replacement. The positioning template 14 is not only used to support the inner end of the positioning mandrel 22, but also to support the rolled profile, playing a positioning and limiting role. It can also be used to match the processing of profiles of different lengths by moving along the axial direction of the mandrel. In actual production, the positioning template 14 can also provide a reference for the start of the welding point, which is beneficial for the alignment welding and the setting of the spot welding length. In this embodiment, the positioning template 14 is connected to the integrated base 18 via a connecting rod 17. The integrated base 18 and the positioning template 14 are respectively disposed on both sides of the support plate 12, and the connecting rod 17 passes through a pre-set guide hole on the support plate 12. The integrated base 18 is connected to a fourth cylinder 19, which drives the integrated base 18 to move the positioning template 14 axially along the mandrel, thereby matching and supporting profile ends of different lengths to ensure welding processing. In this embodiment, the positioning template 14 and the connecting rod 17 are locked together by detachable bolts, forming a perpendicular relationship. The bolts pass through the positioning template 14 and are locked into the end hole of the connecting rod 17 from the front, facilitating quick assembly and disassembly.

[0018] In this embodiment, the telescopic arm 13 is Y-shaped. The fork end of the telescopic arm 13 is provided with a U-shaped groove 131, and the other end of the telescopic arm 13 is fixed on a slide 15 preset on the machine base 1. The slide 15 is installed on the working platform 11 and is driven by the first cylinder 16 to reciprocate, so that the telescopic arm 13 can extend and retract. The extension and retraction direction of the telescopic arm 13 is perpendicular to the axial direction of the positioning shaft 21. The U-shaped groove 131 is adapted to engage the corresponding end of the positioning shaft 21. The structure is simple and the telescopic method is conducive to loading or replacing the mandrel.

[0019] In this embodiment, the two clamping blocks 3 are symmetrically arranged and mounted on the work platform 11 via linear guide rails. Each clamping block 3 is connected to a corresponding second cylinder 5, which is mounted on the machine base 1. The extension and retraction of the second cylinder 5 drives the clamping blocks 3 to move closer to or away from the mold core 2. The linear guide rails provide guidance, ensuring that the two clamping blocks 3 can accurately press the profile from both sides, making the profile tightly adhere to the mold core 2. The clamping blocks 3 have arc-shaped portions 31 that are adapted to contact the profile, so that the profile is subjected to balanced force.

[0020] In this embodiment, the adaptive lifting system includes a third cylinder 61, a lifting seat 62, and an adaptive floating connecting column 63. The welding gun 4 is fixed on the lifting seat 62. The third cylinder 61 is fixed on the movable truss 7 and is vertically suspended. The movable truss 7 is mounted on the base 1 and can move along the axial direction of the mandrel through drive control. The movable truss 7 can be driven by a motor screw, motor rack, or power cylinder, etc., and is not limited to any particular method; it can be selected according to the actual situation. The telescopic end of the third cylinder 61 faces downward and is connected to the lifting seat 62 through the adaptive floating connecting column 63. The adaptive floating connecting column 63 is positioned on the base 1, allowing the lifting seat 62 to adaptively adjust its lifting and lowering to match different mandrel outer diameters, enabling the welding gun 4 to perform spot welding. The adaptive floating connecting column 63 can float by being supported by an elastic element, satisfying the lifting and lowering movement of the lifting seat 62. It can also adaptively adjust to match the downward pressure of the welding gun 4, ensuring welding processing while preventing accidental impact damage to the welding gun 4, thus ensuring production and protecting the equipment.

[0021] This utility model discloses a spot welding machine for silencer tanks, comprising a base and a mold core, clamping blocks, and a welding gun mounted on the base. The mold core includes a positioning shaft and a mandrel sleeved on the positioning shaft. The mandrel is replaceable to accommodate welding of profiles of different sizes after rolling. Two clamping blocks press the profile from both sides, ensuring the profile is tightly against the mold core and the sealing edges of the profile are joined together, guaranteeing profile stability and welding quality. The welding gun is supported by a movable self-adaptive lifting system, allowing it to move along the axial direction of the mandrel and press down on the sealing edges of the profile for spot welding, achieving spot welding within a certain length range. This utility model is suitable for processing tanks of different sizes, such as 4-inch, 4.5-inch, 5-inch, and 6-inch silencer tanks. Only the mandrel needs to be replaced, making it a versatile and practical machine that effectively reduces investment costs.

[0022] While the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention should not be limited to the same structure and operation as described above and the accompanying drawings. For those skilled in the art, many equivalent improvements and variations can be made to the above embodiments through logical analysis, reasoning or limited experiments without exceeding the concept and scope of the present invention, but these improvements and variations should all fall within the scope of protection claimed by the present invention.

Claims

1. A spot welding machine for silencer tanks, characterized in that, The device includes a base (1) and a mold core (2), a clamping block (3), and a welding gun (4) disposed on the base (1). The device is characterized in that: a working platform (11) and a support plate (12) are provided on the base (1), the support plate (12) being side-mounted and located on one side of the working platform (11); the mold core (2) includes a positioning shaft (21) and a mandrel (22) sleeved on the positioning shaft, the mandrel (22) being replaceable; one end of the positioning shaft (21) is fixed to the support plate (12), and the other end of the positioning shaft (21) is away from the support plate and connected to the base. (1) The upper pre-set telescopic arm (13) supports the core rod (22) and also simultaneously restricts the axial displacement of the corresponding end of the core rod (22); there are two clamping blocks (3) and they are respectively set on the left and right sides of the core rod (2) so that after the rolled profile is fitted onto the core rod (2), the two clamping blocks (3) press the profile from both sides so that the profile is tightly attached to the core rod (2) and the sealing edge of the profile is joined together; the welding gun (4) is set on the upper side of the core rod (2) and supported by a movable self-adaptive lifting system so that the welding gun (4) can move along the axial direction of the core rod and press down to spot weld the sealing edge of the profile.

2. The silencer tank spot welding machine according to claim 1, characterized in that, The inner side of the support plate (12) is provided with a positioning template (14), which is replaceable and can move along the axial direction of the mandrel. The positioning template (14) is provided with a positioning hole (141), which is adapted to position the mandrel (22).

3. The silencer tank spot welding machine according to claim 1, characterized in that, The telescopic arm (13) is Y-shaped. The fork end of the telescopic arm (13) is provided with a U-shaped groove (131), and the other end of the telescopic arm (13) is fixed on a slide (15) preset on the base (1). The slide (15) is installed on the working platform (11) and is driven to reciprocate by the first cylinder (16) to make the telescopic arm (13) telescopic. The telescopic direction of the telescopic arm (13) is perpendicular to the axial direction of the positioning shaft (21). The U-shaped groove (131) is adapted to engage the corresponding end of the positioning shaft (21).

4. The silencer tank spot welding machine according to claim 1, characterized in that, The two clamping blocks (3) are respectively installed on the working platform (11) via linear guide rails, and each clamping block (3) is connected to a second cylinder (5). The second cylinder (5) drives the clamping block (3) to approach or move away from the mold core (2). The clamping block (3) has an arc-shaped part (31) adapted to the contact profile.

5. The silencer tank spot welding machine according to claim 1, characterized in that, The adaptive lifting system includes a third cylinder (61), a lifting seat (62), and an adaptive floating connecting column (63). The welding gun (4) is fixed on the lifting seat (62). The third cylinder (61) is fixed on the movable truss (7) and is suspended vertically. The movable truss (7) is installed on the base (1) and can move along the axial direction of the mandrel through drive control. The telescopic end of the third cylinder (61) faces downward and is connected to the lifting seat (62) through the adaptive floating connecting column (63). The adaptive floating connecting column (63) is positioned on the base (1), so that the lifting seat (62) can adjust its lifting according to different mandrel outer diameters through the adaptive floating connecting column, allowing the welding gun (4) to perform spot welding.

6. The silencer tank spot welding machine according to claim 2, characterized in that, The positioning template (14) is connected to the integrated base (18) via a connecting rod (17). The integrated base (18) and the positioning template (14) are respectively set on both sides of the support plate (12), and the connecting rod (17) passes through the pre-set guide hole on the support plate (12). The integrated base (18) is connected to the fourth cylinder (19), so that the fourth cylinder (19) drives the integrated base (18) to drive the positioning template (14) to move along the axial direction of the mandrel. The positioning template (14) and the connecting rod (17) are locked together by detachable bolts.

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