Fixing tool for welding automobile silencer

Abstract

The utility model discloses a fixing tool for welding an automobile silencer, which comprises a tool bottom plate, and supporting legs are fixedly mounted at the lower end of the tool bottom plate; two clamping structures are symmetrically arranged on the tool bottom plate, and a position adjusting structure used for driving the two clamping structures to be close to each other or away from each other is installed on the tool bottom plate. The clamping structure comprises a base and a pressing seat, and a lifting structure used for driving the pressing seat to ascend and descend is installed on the base. The base is provided with two lower vertical plates which are arranged at an interval, two upper vertical plates are fixed on the pressing seat and right opposite to the lower vertical plates, the lower vertical plate and the upper vertical plate which are positioned on the inner side are respectively provided with a semicircular cylinder supporting opening, the lower vertical plate and the upper vertical plate which are positioned on the outer side are respectively provided with a semicircular pipeline supporting opening, and balls are embedded in the cylinder supporting openings and the pipeline supporting openings; an end pressing structure is further installed on one side of the base. The fixing tool for welding the automobile silencer has the advantages of being capable of achieving synchronous clamping, high in precision, convenient to rotate and low in cost.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive muffler production equipment, and in particular to a fixing fixture for welding automotive mufflers. Background Technology

[0002] The car muffler is a cylindrical structure with an air inlet on one side and an air outlet on the other side. The air inlet is connected to the air intake pipe, and the air outlet is connected to the air outlet pipe. The gas is silenced inside the muffler.

[0003] For currently used cylindrical silencers, the cylindrical body is coaxially arranged with the inlet and outlet pipes located at both ends. The inlet pipe is fixedly mounted on the inlet end plate, and the outlet pipe is fixedly mounted on the outlet end plate. During the production process, the inlet and outlet end plates need to be welded to the cylindrical body. Currently, the following two methods are used for welding:

[0004] 1. Manual welding: The cylindrical body is clamped and fixed to the air inlet or outlet pipe respectively. The operator holds a welding gun to weld one end and then welds the other end. This method is inefficient and the toxic and harmful gases produced during welding pose a threat to the health of the operators.

[0005] 2. Automated welding: The cylindrical body, air inlet pipe and air outlet pipe are clamped and fixed separately. The welding gun is driven by a robotic arm to rotate around them to achieve welding. However, clamping three workpieces separately increases the welding error. In addition, the method of welding by driving the welding gun around them with a robotic arm is costly and occupies a lot of space. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the technical problem to be solved by this patent application is how to provide a fixing fixture for welding automotive mufflers that can achieve synchronous clamping, high precision, easy rotation, and low cost.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A fixture for welding automotive mufflers includes a fixture base plate, wherein a support leg is fixedly mounted on the lower end of the fixture base plate.

[0009] Two clamping structures are symmetrically arranged on the tooling base plate. The tooling base plate is equipped with a position adjustment structure for moving the two clamping structures closer or further apart. The clamping structure includes a base and a pressure seat. The base is equipped with a lifting structure for moving the pressure seat up and down. The base has two spaced-apart lower upright plates. The pressure seat has two upper upright plates fixed opposite the lower upright plates. The lower and upper upright plates on the inner side are provided with semi-circular cylinder support openings, and the lower and upper upright plates on the outer side are provided with semi-circular pipe support openings. Both the cylinder support opening and the pipe support opening are embedded with ball bearings. An end clamping structure is also installed on one side of the base.

[0010] The following steps are included when welding the muffler:

[0011] 1. Based on the length of the muffler, adjust the positions of the two clamping structures using the position adjustment structure, placing both ends of the cylinder on the cylinder support opening of the lower upright plate; place the inlet and outlet pipes located on both sides on the pipe support opening, with the inlet end plate and outlet end plate connected to the inlet and outlet pipes located between the two lower upright plates. Drive the pipe ends to move through the end clamping structure, so that the inlet end plate and outlet end plate are pressed against the end of the cylinder. The lifting structure drives the pressure seat to descend, so that the ball bearings on the upper upright plate contact the cylinder and pipes, completing the clamping.

[0012] 2. Both the cylinder support opening and the pipe support opening are embedded with ball bearings. The ball bearings can roll and protrude from the upper and lower vertical plates and contact the cylinder and the pipe. During the welding process, the cylinder can be rotated manually to achieve synchronous rotation of the cylinder with the air inlet pipe and the air outlet pipe. The welding torch can be kept in a fixed welding position to achieve welding of the cylinder with the air inlet pipe or the air outlet pipe.

[0013] This fixture allows for rapid and synchronous fixing of the cylinder to the inlet and outlet pipes, improving welding precision. Furthermore, the welding robot only needs to move the welding torch to the welding position, eliminating the need to rotate around the muffler, thus reducing costs and improving operational convenience. The ball bearing design reduces friction, and the clamping force at both ends ensures synchronous rotation of the inlet and outlet pipes during cylinder rotation, simplifying operation and facilitating muffler welding.

[0014] The position adjustment structure includes a bidirectional screw, the threads on the bidirectional screw have opposite directions of rotation from the middle to both ends, and both ends of the bidirectional screw are threadedly connected to nut blocks, the nut blocks are fixedly installed on the connecting blocks, the tooling base plate has a sliding groove that slides with the connecting blocks, and the bases of the two clamping structures are fixedly connected to the two connecting blocks respectively.

[0015] Supports are fixedly installed on both sides of the lower end of the tooling base plate. The bidirectional screw is connected to the support through bearings. One end of the bidirectional screw is fixedly connected to the output shaft of the servo motor. The servo motor is fixedly installed on the tooling base plate.

[0016] The lifting structure includes two lifting cylinders fixedly installed on the base, with the cylinder rods of the lifting cylinders facing upwards and fixedly connected to the pressure seat.

[0017] The end clamping structure includes a slide block, a slide rail is fixedly installed on the base, the slide block has a slide groove that slides with the slide rail, a rotating shaft is rotatably installed on the slide block via a bearing, and a turntable is fixedly installed at the end of the rotating shaft facing the clamping structure; a telescopic cylinder is fixedly installed on the lower upright plate, and the cylinder rod of the telescopic cylinder is fixedly connected to the slide block.

[0018] The slide is L-shaped and a reinforcing block is fixedly installed at the bend of the slide.

[0019] In summary, the fixture used for welding automotive mufflers has the advantages of enabling synchronous clamping, high precision, easy rotation, and low cost. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a fixing fixture for welding automotive mufflers according to the present invention.

[0021] Figure 2 for Figure 1 The intended use state.

[0022] Figure 3 for Figure 2 A diagram showing another location.

[0023] Figure 4 for Figure 3 A diagram showing another location.

[0024] Figure 5 This is a schematic diagram of a muffler. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings. In the description of the present invention, it should be understood that directional terms such as "upper," "lower," "top," and "bottom" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of the present invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0026] like Figure 1-5 As shown, a fixing fixture for welding automotive mufflers includes a fixture base plate 1, and a support leg is fixedly installed at the lower end of the fixture base plate.

[0027] Two clamping structures are symmetrically arranged on the tooling base plate. The tooling base plate is equipped with a position adjustment structure for moving the two clamping structures closer or further apart. The clamping structure includes a base 2 and a pressure seat 3. The base is equipped with a lifting structure for moving the pressure seat up and down. The base has two spaced lower upright plates 4. The pressure seat is fixed with two upper upright plates 5 opposite to the lower upright plates. The lower and upper upright plates on the inner side are provided with semi-circular cylinder support openings 6, and the lower and upper upright plates on the outer side are provided with semi-circular pipe support openings 7. The cylinder release opening and the pipe release opening are embedded with ball bearings 8. An end clamping structure is also installed on one side of the base.

[0028] The following steps are included when welding the muffler:

[0029] 1. Based on the length of the silencer, adjust the positions of the two clamping structures using the position adjustment structure, and place both ends of the cylinder 9 on the cylinder support opening of the lower upright plate; place the inlet and outlet pipes 10 located on both sides on the pipe support opening, and place the inlet end plate 11 and outlet end plate connected to the inlet and outlet pipes between the two lower upright plates. Drive the pipe ends to move through the end pressing structure, so that the inlet end plate and outlet end plate are pressed against the end of the cylinder. The lifting structure drives the pressure seat to descend, so that the ball bearings on the upper upright plate contact the cylinder and pipe, completing the clamping.

[0030] 2. Both the cylinder support opening and the pipe support opening are embedded with ball bearings. The ball bearings can roll and protrude from the upper and lower vertical plates and contact the cylinder and the pipe. During the welding process, the cylinder can be rotated manually to achieve synchronous rotation of the cylinder with the air inlet pipe and the air outlet pipe. The welding torch can be kept in a fixed welding position to achieve welding of the cylinder with the air inlet pipe or the air outlet pipe.

[0031] This fixture allows for rapid and synchronous fixing of the cylinder to the inlet and outlet pipes, improving welding precision. Furthermore, the welding robot only needs to move the welding torch to the welding position, eliminating the need to rotate around the muffler, thus reducing costs and improving operational convenience. The ball bearing design reduces friction, and the clamping force at both ends ensures synchronous rotation of the inlet and outlet pipes during cylinder rotation, simplifying operation and facilitating muffler welding.

[0032] Specifically, ball bearings are embedded in the support openings of the upper and lower upright plates, which is existing technology and is designed with reference to the ball bearing platform structure. The purpose is to reduce friction and facilitate the rotation of the cylinder and pipe.

[0033] In implementation, the position adjustment structure includes a bidirectional screw 12, the threads on the bidirectional screw have opposite directions of rotation from the middle to both ends, and both ends of the bidirectional screw are threadedly connected to nut blocks, the nut blocks are fixedly installed on the connecting block 13, the tooling base plate has a sliding groove that slides with the connecting block, and the bases of the two clamping structures are fixedly connected to the two connecting blocks respectively.

[0034] Supports are fixedly installed on both sides of the lower end of the tooling base plate. The bidirectional screw is connected to the support through bearings. One end of the bidirectional screw is fixedly connected to the output shaft of the servo motor 14. The servo motor is fixedly installed on the tooling base plate.

[0035] In this way, when adjusting the position of the clamping structure, the servo motor drives a bidirectional screw to rotate. Since the threads on the bidirectional screw turn in opposite directions from the middle to both ends, the base can be moved closer or further apart via two nut blocks and a connecting block, allowing for rapid position adjustment. The bidirectional screw is an existing structure.

[0036] In implementation, the lifting structure includes two lifting cylinders 15 fixedly installed on the base. The cylinder rods of the lifting cylinders are upwardly positioned and fixedly connected to the pressure seat. The lifting cylinders drive the pressure seat to lift and lower. The two lifting cylinders are respectively connected to both sides of the pressure seat.

[0037] In implementation, the end clamping structure includes a slide block 16, a slide rail 17 fixedly mounted on the base, a groove on the slide block that slides with the slide rail, a rotating shaft rotatably mounted on the slide block via a bearing, and a turntable 18 fixedly mounted on the end of the rotating shaft facing the clamping structure; a telescopic cylinder 19 is fixedly mounted on the lower upright plate, and the cylinder rod of the telescopic cylinder is fixedly connected to the slide block. When clamping the inlet and outlet pipes, the telescopic cylinder drives the slide block to move, causing the turntable to contact and abut against the pipes. The turntable is positioned directly opposite the pipe support opening for better contact with the pipes. The groove improves the stability and reliability of the slide block's movement.

[0038] In practice, the slide is L-shaped, and a reinforcing block is fixedly installed at the bend of the slide to improve stability.

[0039] Specifically, it also includes a PLC control cabinet that is fixedly installed at the bottom of the tooling base plate, which is connected to the servo motor, lifting cylinder and telescopic cylinder to control the operation of electrical components.

[0040] Finally, it should be noted that those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A fixing fixture for welding automotive mufflers, characterized in that, Includes a tooling base plate (1), and a support leg is fixedly installed at the lower end of the tooling base plate; Two clamping structures are symmetrically arranged on the tooling base plate. The tooling base plate is equipped with a position adjustment structure for moving the two clamping structures closer or further apart. The clamping structure includes a base (2) and a pressure seat (3). The base is equipped with a lifting structure for moving the pressure seat up and down. The base has two spaced lower upright plates (4). The pressure seat is fixed with two upper upright plates (5) opposite the lower upright plates. The lower and upper upright plates on the inner side are provided with semi-circular cylinder support openings (6). The lower and upper upright plates on the outer side are provided with semi-circular pipe support openings (7). The cylinder support openings and pipe support openings are embedded with ball bearings (8). An end clamping structure is also installed on one side of the base.

2. The fixing fixture for welding automotive mufflers according to claim 1, characterized in that, The position adjustment structure includes a bidirectional screw (12), the threads on the bidirectional screw have opposite directions of rotation from the middle to both ends, both ends of the bidirectional screw are threaded with nut blocks, the nut blocks are fixedly installed on the connecting block (13), the tooling base plate has a sliding groove that slides with the connecting block, and the bases of the two clamping structures are fixedly connected to the two connecting blocks respectively. Supports are fixedly installed on both sides of the lower end of the tooling base plate. The bidirectional screw is connected to the support through a bearing. One end of the bidirectional screw is fixedly connected to the output shaft of the servo motor (14). The servo motor is fixedly installed on the tooling base plate.

3. The fixing fixture for welding automotive mufflers according to claim 2, characterized in that, The lifting structure includes two lifting cylinders (15) fixedly installed on the base, with the cylinder rods of the lifting cylinders facing upwards and fixedly connected to the pressure seat.

4. The fixing fixture for welding automotive mufflers according to claim 3, characterized in that, The end clamping structure includes a slide block (16), a slide rail (17) is fixedly installed on the base, the slide block has a slide groove that slides with the slide rail, a rotating shaft is rotatably installed on the slide block through a bearing, and a turntable (18) is fixedly installed at the end of the rotating shaft facing the clamping structure; a telescopic cylinder (19) is fixedly installed on the lower upright plate, and the cylinder rod of the telescopic cylinder is fixedly connected to the slide block.

5. A fixing fixture for welding automotive mufflers according to claim 4, characterized in that, The slide is L-shaped and a reinforcing block is fixedly installed at the bend of the slide.

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