A welding positioner for a hanger lug on a muffler end cap

Abstract

A welding positioner for a hanger lug on a muffler end cover comprises a base, a door-shaped frame is installed on the base through screws, a downward arm is installed on the geometric center position of the lower wall of the horizontal section of the door-shaped frame through screws, a concave sleeve is sleeved on the downward arm, and a positioning fork plate is welded on the concave sleeve. The utility model is positioned by two synchronous inward moving clamps on the ring piece, the axial direction of the ring piece coincides with the geometric center of the base and the length direction of the downward arm after positioning, the ring piece is positioned to prevent the ring piece from moving during welding and affecting the welding precision, and the positioning is performed in a synchronous inward abutting manner during positioning, so that the positioning precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of muffler processing technology, and in particular to a welding positioner for the lifting lugs on the end cap of a muffler. Background Technology

[0002] like Figure 3 This diagram shows the structure of the end cap for a nitrogen venting silencer. The end cap is welded to the upper end of a pipe fitting, which has multiple holes on its outer circumference. A lower cap is welded to the lower end of the pipe fitting, and an air inlet pipe is connected to the lower cap. The end cap includes a ring 9 welded to the upper end of the pipe fitting. The upper end of the ring 9 has an arc-shaped shell 90, and a lifting lug 91 is welded to the arc-shaped shell 90. The lifting lug 91 has an inverted V-shaped structure, and its upper end is arc-shaped. An installation hole 92 is provided at the upper end of the lifting lug 91, which is used for lifting the silencer. Therefore, the welding precision required on the end cap is high. Currently, the operator first marks the welding position on the arc-shaped shell 90, then places the lifting lug 91 within the marked frame before spot welding and welding. This welding method requires the operator to hold the lug during welding, which can easily lead to displacement during the welding process, affecting welding precision. Utility Model Content

[0003] This utility model provides a welding positioner for the lifting lugs on the end cap of a muffler, which solves the shortcomings of the prior art and addresses the problem of low welding precision, and has strong practicality.

[0004] In order to achieve the purpose of this utility model, the following technology is proposed to be adopted: A muffler end cap lifting lug welding positioner includes a base, a gantry frame is mounted on the base by screws, a lower extension arm is mounted on the lower wall of the horizontal section of the gantry frame by screws, a concave sleeve is fitted on the lower extension arm, and a positioning fork plate is welded on the concave sleeve.

[0005] Furthermore, the lower end of the positioning fork plate has a V-shaped slot, and the upper end of the slot has an arc-shaped structure.

[0006] Furthermore, the lower end of the lower extension arm is connected by a threaded fixing screw with an end cap.

[0007] Furthermore, a lower top rotating plate is connected to one side of the lower extension arm via a hinge shaft. The lower end of the lower top rotating plate has an arc-shaped structure and abuts against the upper end of the concave sleeve.

[0008] Furthermore, an upper extension plate is welded to the transverse section of the portal frame. A concave top piece is provided at the upper end of the upper extension plate via a rotating shaft. The lower end of the concave top piece has an arc-shaped structure. A lower pressure plate is fitted on the upper extension plate. When the concave top piece is in a vertical state, its lower end abuts against the upper wall of the lower pressure plate. Moving arms are respectively installed at both ends of the lower pressure plate via screws. A pressure rod is rotatably provided at the lower end of the moving arms. The vertical section of the portal frame is provided with a pair of through rods. The inner end of each pair of through rods is welded with a clamp plate, and the outer end of each pair of through rods is welded with an inner top recess. The two sides of the inner top recess are respectively provided with oblique holes. The pressure rod is inserted into the oblique hole, and the upper end of the oblique hole extends inward at an inclination.

[0009] Furthermore, the inner side of the clamp is formed with a concave arc-shaped groove.

[0010] The advantages of the above technical solution are: This invention first positions the ring by two synchronously inward-moving clamps. After positioning, the axial direction of the ring coincides with the geometric center of the base and the length direction of the lower extension arm. Positioning the ring prevents it from moving during welding and affecting the welding accuracy. Furthermore, the positioning is performed by synchronously abutting inward, thus improving the positioning accuracy.

[0011] This utility model uses the lower extension arm and its positioning fork plate to position the lifting lug. Since the positioning fork plate has a slot that matches and adapts to the lifting lug, the posture of the lifting lug during welding can be ensured. The fixing screw is inserted into the mounting hole of the lifting lug to fix the lifting lug, thus avoiding the problem of lifting lug displacement during welding. Attached Figure Description

[0012] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will provide a further detailed description of this utility model in conjunction with the accompanying drawings.

[0013] Figure 1 A three-dimensional structural diagram of one embodiment is shown.

[0014] Figure 2 A magnified view of point A is shown.

[0015] Figure 3 A three-dimensional structural diagram of the muffler end cap is shown. Detailed Implementation

[0016] like Figures 1-3 As shown, a muffler end cap lifting lug welding positioner includes a base 1, a gantry frame 2 mounted on the base 1 by screws, a lower extension arm 3 mounted on the lower wall of the horizontal section of the gantry frame 2 by screws, a concave sleeve 31 sleeved on the lower extension arm 3, a positioning fork plate 32 welded on the concave sleeve 31, a V-shaped slot with an open lower end of the positioning fork plate 32, an arc-shaped upper end of the slot, and a fixing screw 30 with an end cap threaded to the lower end of the lower extension arm 3.

[0017] In some embodiments, a lower top rotating plate is connected to one side of the lower extension arm 3 via a hinge shaft. The lower end of the lower top rotating plate has an arc-shaped structure and abuts against the upper end of the concave sleeve 31.

[0018] The transverse section of the portal frame 2 is welded with an upper extension plate 4. The upper end of the upper extension plate 4 is provided with a concave top piece 41 via a rotating shaft 40. The lower end of the concave top piece 41 has an arc-shaped structure. A lower pressure plate 400 is fitted on the upper extension plate 4. When the concave top piece 41 is in a vertical state, its lower end abuts against the upper wall of the lower pressure plate 400. The two ends of the lower pressure plate 400 are respectively equipped with movable arms 42 by screws. The lower end of the movable arms 42 is provided with a pressure rod 43.

[0019] A pair of through rods 44 are respectively installed on the vertical section of the portal frame 2. A clamping plate 45 is welded to the inner end of each pair of through rods 44. The inner side of the clamping plate 45 is formed with an inwardly concave arc groove. An inner top recess 46 is welded to the outer end of each pair of through rods 44. An inclined hole 47 is opened on both sides of the inner top recess 46. The pressure rod 43 is inserted into the inclined hole 47. The upper end of the inclined hole 47 extends inward at an inclination.

[0020] When in use, place the ring 9 on the end cap downwards on the base 1 and between the clamping plate 45.

[0021] Then the operator rotates the concave top part 41. When it rotates, its lower end will abut against the upper wall of the lower pressure plate 400, so that the lower pressure plate 400 moves downward along the vertical direction of the upper extension plate 4. During the movement, it will drive the pressure rod 43 to move downward and abut against the inner wall of the inclined hole 47. This will cause the inner top concave part 46 to drive the clamping plate 45 to move inward, and make the inner wall of the clamping plate 45 tightly adhere to the outer circumference of the ring part 9. Since the entire end cover is stamped and formed in one piece, its roundness and axial direction have strict precision. In this way, it can be ensured that the lifting lug 91 is located directly above the end cover.

[0022] Next, the operator inserts the fixing screw 30 into the mounting hole 92 and connects the fixing screw 30 to the lower end of the lower extension arm 3 via threads. This allows the inner end of the fixing screw 30's cap to abut against one side of the lifting lug 91, while the other side of the lifting lug 91 abuts against the side wall of the lower extension arm 3. Then, the positioning fork plate 32 is moved downwards so that the upper end of the lifting lug 91 is engaged in the slot. This ensures the verticality of the lifting lug 91 and that the lower end of the lifting lug 91 abuts against the outer periphery of the arc-shaped shell 90. Optionally, the lower top rotating plate can be rotated to fix the positioning fork plate 32, thus ensuring the stability of the positioning fork plate 32 in fixing the posture of the lifting lug 91. The above method ensures the accuracy of the relative position between the lifting lug 91 and the end cap.

[0023] Finally, the lifting lug 91 and the end cap are welded.

[0024] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Obviously, 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 of this utility model fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A lug weld positioner for a muffler end cap, comprising: Includes a base (1), a gantry frame (2) is installed on the base (1) by screws, a lower extension arm (3) is installed at the geometric center of the lower wall of the horizontal section of the gantry frame (2) by screws, a concave sleeve (31) is fitted on the lower extension arm (3), and a positioning fork plate (32) is welded on the concave sleeve (31).

2. The muffler end cap lifting lug welding positioner according to claim 1, characterized in that, The lower end of the positioning fork plate (32) is provided with a V-shaped slot, and the upper end of the slot is arc-shaped.

3. The muffler end cap lug welding positioner of claim 1, wherein, The lower end of the lower extension arm (3) is connected by a threaded fixing screw (30) with an end cap.

4. The muffler end cap lug welding positioner of claim 1, wherein, One side of the lower extension arm (3) is connected to a lower top rotating plate via a hinge shaft. The lower end of the lower top rotating plate has an arc-shaped structure and abuts against the upper end of the concave sleeve (31).

5. The muffler end cap lug welding positioner of claim 1 wherein, The transverse section of the portal frame (2) is welded with an upper extension plate (4). The upper end of the upper extension plate (4) is provided with a concave top piece (41) through a rotating shaft (40). The lower end of the concave top piece (41) has an arc-shaped structure. A lower pressure plate (400) is fitted on the upper extension plate (4). When the concave top piece (41) is in a vertical state, its lower end abuts against the upper wall of the lower pressure plate (400). The two ends of the lower pressure plate (400) are respectively installed with moving arms (42) by screws. The lower end of the moving arm (42) is provided with a pressure rod (43). The vertical section of the portal frame (2) is provided with a pair of through rods (44). Each pair of through rods (44) has a clamp plate (45) welded to its inner end and an inner top recess (46) welded to its outer end. The inner top recess (46) has oblique holes (47) on both sides. The pressure rod (43) is inserted into the oblique hole (47). The upper end of the oblique hole (47) extends inward at an inclination.

6. The silencer end cap lifting lug welding positioner according to claim 5, characterized in that, The inner side of the clamp (45) is formed with an inwardly concave arc-shaped groove.

Images