12kw engine muffler exhaust pipe and support welding tooling

Abstract

The utility model discloses 12KW engine silencer exhaust pipe and support welding frock, include, bottom plate, cylinder body position, exhaust pipe I position, exhaust pipe II position and support position, the bottom plate is rectangle board, cylinder body position sets up in bottom plate rear side, and includes: cylinder body support, end head support, exhaust hole position, support board I, cylinder I and air inlet pipe pressure plate, exhaust pipe I position and exhaust pipe II position all include flange clamp, flange clamp includes: support board II, cylinder II, chuck and flange seat, support position sets up in the middle part of bottom plate, and includes: position plate, support board III, pressure plate I, support board IV, cylinder III, cylinder IV and pressure plate II, the utility model discloses 12KW engine silencer exhaust pipe and support welding frock's beneficial technical effects can be accurate positioning and clamping to silencer, exhaust pipe I, exhaust pipe II and support simultaneously, has simplified the operation, has guaranteed that each spare part after welding can satisfy the design requirement.

Description

Technical Field

[0001] This utility model relates to a welding technology for the exhaust pipe and support of a 12KW engine muffler, and particularly to a welding fixture for the exhaust pipe and support of a 12KW engine muffler. Background Technology

[0002] To utilize waste heat, the 12kW engine muffler is equipped with two exhaust pipes. One pipe discharges exhaust gas, and the other reuses a portion of the exhaust gas. Due to space constraints in the 12kW engine muffler installation, the two exhaust pipes are S-shaped and welded side-by-side to the upper end face of one end of the muffler body. The S-shaped exhaust pipe is relatively long, with one end welded to the muffler body (welded end) and the other end welded with a flange (flange end). During welding, the connecting lines of the flange through holes of the two exhaust pipes must be perpendicular to the line connecting the exhaust holes on the muffler body. Additionally, an L-shaped support needs to be welded to the outer circumference of the muffler body. The two legs of the L-shaped support each have through holes, and an arc matching the outer circumference of the muffler body is provided at the bend of the L-shaped support, through which the support is welded to the outer circumference of the muffler body. During welding, the horizontal side of the L-shaped support must be parallel to the line connecting the exhaust holes on the muffler body (see Appendix). Figure 1 In the diagram, A represents the muffler body, B represents exhaust pipe I, C represents exhaust pipe II, and D represents the support. Current technology for welding the exhaust pipes and supports of a 12kW engine muffler involves using multiple clamps to individually hold and fix the two exhaust pipes and the support at the welding point, and then welding them one by one. Due to the multiple clamping, fixing, and welding processes, the operation is not only cumbersome but also makes it difficult to ensure that the welding positions of the two exhaust pipes and the support meet the design requirements.

[0003] Obviously, the existing welding method for the exhaust pipe and support of the 12KW engine muffler has problems such as complicated operation and difficulty in ensuring that the welding positions of the two exhaust pipes and the support meet the design requirements. Summary of the Invention

[0004] To address the problems of complex operation and difficulty in ensuring that the welding positions of the two exhaust pipes and the support meet the design requirements in the existing welding methods for 12KW engine mufflers and exhaust pipes, this utility model proposes a welding fixture for 12KW engine mufflers and exhaust pipes.

[0005] This utility model relates to a welding fixture for a 12KW engine muffler exhaust pipe and support, comprising a base plate, a cylinder positioning system, an exhaust pipe I positioning system, an exhaust pipe II positioning system, and a support positioning system. The base plate is rectangular. The cylinder positioning system is located on the rear side of the base plate and includes: a cylinder support, an end support, an exhaust port positioning system, a support plate I, a cylinder I, and an intake pipe pressure plate. The cylinder support consists of two pieces, fixed at intervals in the middle of the rear side of the base plate. A semi-circular notch I with a diameter matching the muffler cover is provided on the upper part of the cylinder support. The end support is located on the outer side of the left cylinder support, and a semi-circular annular groove matching the raised step of the cylinder end is provided at the front end of the upper part of the end support. The exhaust port positioning system is located on the rear side of the end support, and a groove matching the raised step of the cylinder end is provided on the upper part. The exhaust port flange is matched with a semicircular notch II; the fixed position and height of the exhaust port positioning are based on the fact that after the cylinder is fixed in the set position, the exhaust port flange on the cylinder just contacts the semicircular notch II; the support plate I is fixed on the outside of the right side of the cylinder support; the piston of the cylinder I is fixed above the support plate I; the intake pipe pressure plate is fixed on the piston end of the cylinder I, and its outer end face is provided with a concave step that matches the intake pipe end of the muffler; the piston, semicircular notch I, semicircular notch II and semicircular annular groove of the cylinder I are coaxial; the positioning of exhaust pipe I and exhaust pipe II both include flange clamps; the flange clamp includes: support plate II, cylinder II, clamp and flange seat; the support plate II is fixed at intervals on the left side of the base plate; the cylinder II The piston is fixed outward above the support plate II; the clamp is U-shaped, with its two legs slidingly mounted above the support plate II through the support plate II, and the crossbeam connected to the piston end of the cylinder II; the two legs of the clamp are provided with barbs and are located above and below the flange seat respectively; the flange seat is fixed on the inner surface of the support plate II, and its shape is the same as the exhaust pipe flange. Positioning pins matching the inner diameter of the exhaust pipe and the flange through hole are provided on the surface of the flange seat, and the line connecting the positioning pins of the flange through hole is perpendicular to the base plate surface; after the flange clamp is fixed in the set position by the cylinder, the welded ends of exhaust pipe I and exhaust pipe II are respectively inserted into the corresponding exhaust holes on the cylinder, and the flange ends of exhaust pipe I and exhaust pipe II are respectively fitted with... The positioning pins are installed on the flange seat and are corresponding to the positioning pins. The support positioning is set in the middle of the base plate and includes: a positioning plate, a support plate III, a pressure plate I, a support plate IV, a cylinder III, a cylinder IV, and a pressure plate II. The front of the positioning plate is provided with a positioning pin I that matches the lower through hole of the support. Its fixed position and height are such that when the support is placed in the set welding position after the cylinder is fixed in the set position, the lower through hole of the support is just fitted onto the positioning pin I. The upper surface of the support plate III is provided with a positioning pin II that matches the upper through hole of the support. Its fixed position and height are such that when the support is placed in the set welding position after the cylinder is fixed in the set position, the upper through hole of the support is just fitted onto the positioning pin II. The piston of the cylinder IV is fixed to the lower side of the support plate III with the positioning plate I pointing towards it.The pressure plate I is fixed to the piston end of cylinder IV. A blind hole is provided on the front end face of pressure plate I, and the blind hole is coaxial with positioning post I. The support plate IV is L-shaped and is fixed upside down to the side of support plate III. The piston of cylinder III is fixed to the horizontal side of support plate IV, pointing towards the bottom plate. The pressure plate II is fixed to the piston end of cylinder III. A blind hole is provided on the front end face of pressure plate II, and the blind hole is coaxial with positioning post II. The set position of the cylinder refers to the position where the muffler is placed on the cylinder support, the protruding step at the end of the cylinder enters the semi-circular groove of the end support, the intake pipe pressure plate presses against the intake pipe end of the muffler, and the line connecting the exhaust holes on the cylinder is parallel to the surface of the bottom plate.

[0006] Furthermore, the positioning of the exhaust pipe II also includes an exhaust pipe II support. The upper end face of the exhaust pipe II support is provided with a semi-circular groove that matches the exhaust pipe II. The fixed position and height of the exhaust pipe II support are determined by fixing the cylinder to a set position, inserting the welded end of the exhaust pipe II into the exhaust hole on the cylinder, and fitting the flange end onto the positioning post on the flange seat, so that the middle section of the exhaust pipe II is placed exactly in the semi-circular groove on the exhaust pipe II support.

[0007] The beneficial technical effect of this utility model of welding fixture for 12KW engine muffler exhaust pipe and support is that it can accurately position and clamp the muffler, exhaust pipe I, exhaust pipe II and support at the same time, which simplifies the operation and ensures that all components after welding can meet the design requirements. Attached Figure Description

[0008] Appendix Figure 1 This is a three-dimensional schematic diagram of the muffler exhaust pipe and support of a 12KW engine before and after welding.

[0009] Appendix Figure 2 This is a three-dimensional schematic diagram of the welding fixture for the exhaust pipe and support of the 12KW engine muffler of this utility model.

[0010] Appendix Figure 3 This is a three-dimensional schematic diagram of the flange clamp of this utility model;

[0011] Appendix Figure 4 This is a three-dimensional schematic diagram of the support positioning of this utility model;

[0012] Appendix Figure 5 This is a three-dimensional schematic diagram of the support positioning of this utility model from another angle;

[0013] Appendix Figure 6 This is a three-dimensional schematic diagram of the welding fixture for the exhaust pipe and support of the 12KW engine muffler of this utility model.

[0014] In the diagram, A is the cylinder body, B is exhaust pipe I, C is exhaust pipe II, and D is the support; 1 is the base plate; 2 is the cylinder body positioning, 2-1 is the cylinder body support, 2-2 is the end support, 2-3 is the exhaust hole positioning, 2-4 is the support plate I, 2-5 is the cylinder I, and 2-6 is the intake pipe pressure plate; 3 is the exhaust pipe I positioning; 4 is the exhaust pipe II positioning, and 4-1 is the exhaust pipe II support; 5 is the support positioning, 5-1 is the positioning plate I, 5-2 is the support plate III, 5-3 is the pressure plate I, 5-4 is the support plate IV, 5-5 is the cylinder III, 5-6 is the cylinder IV, and 5-7 is the pressure plate II; 6 is the flange clamp, 6-1 is the support plate II, 6-2 is the cylinder II, 6-3 is the clamp, and 6-4 is the flange seat.

[0015] The following description, in conjunction with the accompanying drawings and specific embodiments, further illustrates the welding fixture for the exhaust pipe and support of the 12KW engine muffler of this utility model. Detailed Implementation

[0016] See appendix Figures 2-6As shown in the figure, the welding fixture for the exhaust pipe and support of the 12KW engine muffler of this utility model includes a base plate 1, a cylinder positioning 2, an exhaust pipe I positioning 3, an exhaust pipe II positioning 4, and a support positioning 5; the base plate is a rectangular plate; the cylinder positioning is set on the rear side of the base plate and includes: a cylinder support 2-1, an end support 2-2, an exhaust port positioning 2-3, a support plate I 2-4, a cylinder I 2-5, and an intake pipe pressure plate 2-6; the cylinder support consists of two pieces, fixed at intervals in the middle of the rear side of the base plate, and a semi-circular notch I with a diameter matching the muffler cover is provided on the upper part of the cylinder support; the end support is set on the outer side of the left cylinder support, and a protrusion matching the end of the cylinder is provided at the front end of the upper part of the end support. A semi-circular groove matching the step; the exhaust port is positioned on the rear side of the end support, with a semi-circular notch II on the upper part matching the exhaust port flange on the cylinder; the fixed position and height of the exhaust port positioning are such that after the cylinder is fixed in the set position, the exhaust port flange on the cylinder just contacts the semi-circular notch II; the support plate I is fixed on the outside of the right cylinder support; the piston of cylinder I is fixed above the support plate I; the intake pipe pressure plate is fixed to the piston end of cylinder I, and its outer end face is provided with a concave step matching the intake pipe end of the muffler; the piston, semi-circular notch I, semi-circular notch II and semi-circular groove of cylinder I are coaxial; the positioning of exhaust pipe I and exhaust pipe II both include The system includes a flange clamp 6; the flange clamp comprises: a support plate II 6-1, a cylinder II 6-2, a chuck 6-3, and a flange seat 6-4; the support plate II is fixed at intervals on the left side of the base plate; the piston of the cylinder II is fixed outwardly above the support plate II; the chuck is U-shaped, with its two legs slidingly mounted above the support plate II through the support plate II, and its crossbeam connected to the piston end of the cylinder II; the two legs of the chuck are provided with barbs and are respectively located above and below the flange seat; the flange seat is fixed to the inner surface of the support plate II, and its shape is the same as that of the exhaust pipe flange. Positioning pins matching the inner diameter of the exhaust pipe and the flange through hole are provided on the surface of the flange seat, and the line connecting the positioning pins of the flange through hole is perpendicular to the surface of the base plate. The flange clamp is fixed at a position and height such that after the cylinder is fixed in the set position, the welded ends of exhaust pipe I and exhaust pipe II are respectively inserted into the corresponding exhaust holes on the cylinder, and the flange ends of exhaust pipe I and exhaust pipe II are respectively fitted onto the corresponding positioning pins on the flange seat; the support positioning is set in the middle of the base plate, including: positioning plate 5-1, support plate III 5-2, pressure plate I 5-3, support plate IV 5-4, cylinder III 5-5, cylinder IV 5-6, and pressure plate II 5-7; the front of the positioning plate is provided with positioning pin I that matches the through hole on the lower side of the support, and its fixed position and height are such that after the cylinder is fixed in the set position, when the support is placed in the set welding position, the through hole on the lower side of the support is just fitted onto positioning pin I;The upper surface of the support plate III is provided with a positioning post II that matches the through hole on the upper side of the support. Its fixed position and height are such that, after the cylinder is fixed in the set position, when the support is placed in the set welding position, the through hole on the upper side of the support is exactly fitted onto the positioning post II. The piston of the cylinder IV is fixed to the lower side of the positioning plate I. The pressure plate I is fixed to the piston end of the cylinder IV, and a blind hole is provided on the front end face of the pressure plate I, and the blind hole is coaxial with the positioning post I. The support plate IV is L-shaped and fixed upside down. The side of support plate III; the piston of cylinder III is fixed to the horizontal side of support plate IV; pressure plate II is fixed to the piston end of cylinder III, and a blind hole is provided on the front end face of pressure plate II, and the blind hole is coaxial with positioning post II; wherein, the set position of the cylinder body refers to the position when the muffler is placed on the cylinder body support, the convex step of the cylinder body end enters the semi-circular groove of the end support, the intake pipe pressure plate presses on the intake pipe end of the muffler, and the line connecting the exhaust holes on the cylinder body is parallel to the surface of the base plate. The beneficial technical effect of the 12KW engine muffler exhaust pipe and support welding fixture of this utility model is that it can accurately position and clamp the muffler, exhaust pipe I, exhaust pipe II and support at the same time, and weld them at the same time, simplifying the operation and ensuring that all components after welding can meet the design requirements. During the welding process, the muffler is placed on the cylinder support. The muffler is rotated until the exhaust port flange on the cylinder contacts the semi-circular notch II. At this point, the line connecting the exhaust ports on the cylinder is parallel to the surface of the base plate. The cylinder is pushed so that the raised step at the end of the cylinder enters the semi-circular groove of the end support, thus positioning the cylinder more precisely. Cylinder I is activated, pushing the intake pipe pressure plate against the intake pipe end of the muffler, precisely positioning and clamping the muffler cylinder. The welding ends of exhaust pipes I and II are inserted into the corresponding exhaust ports on the cylinder, and the flanges of exhaust pipes I and II are... The ends are respectively fitted onto the positioning posts of the corresponding flange seats; cylinder II is activated, pushing the chuck outward, and the barbs on the chuck's support legs clamp the flanges on exhaust pipe I and exhaust pipe II onto the flange seats. At this time, exhaust pipe I and exhaust pipe II are precisely positioned and clamped; the support is placed at the intended welding position, so that the lower through hole of the support is fitted onto positioning post I, and the upper through hole of the support is fitted onto positioning post II. Cylinders III and IV are activated in sequence, pushing pressure plate II and pressure plate I to press the upper and lower sides of the support tightly onto support plate III and positioning plate respectively. At this time, the support is precisely positioned and clamped. Under these conditions, welding of exhaust pipe I, exhaust pipe II, and support, whether done manually or by a robot, can effectively ensure that all welded components meet the design requirements.

[0017] As one of the preferred technical solutions, the positioning of the exhaust pipe II further includes an exhaust pipe II support 4-1. The upper end face of the exhaust pipe II support is provided with a semi-circular groove that matches the exhaust pipe II. The fixed position and height of the exhaust pipe II support are determined such that after the cylinder is fixed in the set position, the welded end of the exhaust pipe II is inserted into the exhaust hole on the cylinder, and the flange end is fitted onto the positioning post on the flange seat, with the middle section of the exhaust pipe II just placed in the semi-circular groove on the exhaust pipe II support. Because the exhaust pipe II is long and heavy, it may shift position during clamping. Adding an exhaust pipe II support can make the center of gravity of the exhaust pipe II more stable and avoid position shift.

[0018] Obviously, the beneficial technical effect of this utility model of 12KW engine muffler exhaust pipe and support welding fixture is that it can accurately position and clamp the muffler, exhaust pipe I, exhaust pipe II and support at the same time, which simplifies the operation and ensures that all components after welding can meet the design requirements.

Claims

1. A welding fixture for the exhaust pipe and support of a 12KW engine muffler, characterized in that, The welding fixture includes a base plate, a cylinder positioning element, an exhaust pipe I positioning element, an exhaust pipe II positioning element, and a support positioning element. The base plate is rectangular. The cylinder positioning element is located on the rear side of the base plate and includes a cylinder support, an end support, an exhaust port positioning element, a support plate I, a cylinder I, and an intake pipe pressure plate. The cylinder support consists of two pieces, fixed at intervals in the middle of the rear side of the base plate. A semi-circular notch I with a diameter matching the muffler cover is provided on the upper part of the cylinder support. The end support is located on the outer side of the left cylinder support, and a semi-circular annular groove matching the raised step of the cylinder end is provided at the front end of the upper part of the end support. The exhaust port positioning element is located on the rear side of the end support, and a semi-circular notch II matching the exhaust port flange on the cylinder is provided on the upper part. The exhaust port positioning element is fixed at a specific position. The position and height are determined by ensuring that the exhaust port flange on the cylinder is in contact with the semicircular notch II after the cylinder body is fixed in the set position; the support plate I is fixed on the outside of the right side of the cylinder body support; the piston of cylinder I is fixed above the support plate I, pointing towards the cylinder body support; the intake pipe pressure plate is fixed to the piston end of cylinder I, and its outer end face is provided with a concave step that matches the end of the muffler intake pipe; the piston, semicircular notch I, semicircular notch II, and semicircular annular groove of cylinder I are coaxial; the positioning of exhaust pipe I and exhaust pipe II both include flange clamps; the flange clamp includes: support plate II, cylinder II, clamp and flange seat; the support plate II is fixed at intervals on the left side of the base plate; the piston of cylinder II is fixed outward above the support plate II; the clamp is U-shaped, and its two U-shaped clamps The support legs slide above the support plate II, and the crossbeam is connected to the piston end of the cylinder II. The two support legs of the clamp are equipped with barbs and are located above and below the flange seat, respectively. The flange seat is fixed to the inner surface of the support plate II, and its shape is the same as the exhaust pipe flange. Positioning pins matching the inner diameter of the exhaust pipe and the flange through-hole are provided on the surface of the flange seat, and the line connecting the positioning pins of the flange through-hole is perpendicular to the surface of the base plate. The fixed position and height of the flange clamp are determined by fixing the cylinder to the set position, inserting the welded ends of exhaust pipe I and exhaust pipe II into the corresponding exhaust holes on the cylinder, and then fitting the flange ends of exhaust pipe I and exhaust pipe II onto the corresponding positioning pins on the flange seat. The support positioning is located in the middle of the base plate and includes: a positioning plate, a support... The system comprises plate III, pressure plate I, support plate IV, cylinder III, cylinder IV, and pressure plate II. The front of the positioning plate is provided with a positioning post I that matches the lower through hole of the support. Its fixed position and height are such that when the cylinder is fixed in the set position and the support is placed in the set welding position, the lower through hole of the support is precisely fitted onto the positioning post I. The upper surface of the support plate III is provided with a positioning post II that matches the upper through hole of the support. Its fixed position and height are such that when the cylinder is fixed in the set position and the support is placed in the set welding position, the upper through hole of the support is precisely fitted onto the positioning post II. The piston of cylinder IV is fixed to the lower side of the support plate I, pointing towards the positioning plate I. The pressure plate I is fixed to the piston end of cylinder IV, and a blind hole is provided on the front end face of the pressure plate I, with the blind hole coaxial with the positioning post I.The support plate IV is L-shaped and fixed upside down to the side of the support plate III; the piston of the cylinder III is fixed to the horizontal edge of the support plate IV, pointing towards the bottom plate; the pressure plate II is fixed to the piston end of the cylinder III, and a blind hole is provided on the front end face of the pressure plate II, and the blind hole is coaxial with the positioning post II; wherein, the set position of the cylinder body refers to the position when the muffler is placed on the cylinder body support, the protruding step at the end of the cylinder body enters the semi-circular groove of the end support, the air inlet pipe pressure plate presses against the end of the muffler air inlet pipe, and the line connecting the exhaust holes on the cylinder body is parallel to the surface of the bottom plate.

2. The welding fixture for the 12KW engine muffler exhaust pipe and support according to claim 1, characterized in that, The positioning of the exhaust pipe II also includes an exhaust pipe II support. The upper end face of the exhaust pipe II support is provided with a semi-circular groove that matches the exhaust pipe II. The fixed position and height of the exhaust pipe II support are determined by fixing the cylinder to a set position, inserting the welded end of the exhaust pipe II into the exhaust hole on the cylinder, and fitting the flange end onto the positioning post on the flange seat. The middle section of the exhaust pipe II is then positioned exactly in the semi-circular groove on the exhaust pipe II support.

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