Portable engine silencer intake pipe flange welding tool

Abstract

The utility model discloses portable engine silencer air inlet pipe flange welding frock, include, bottom plate, vertical board, upper cross board, flange positioning mechanism and air inlet pipe positioning mechanism, the bottom plate is rectangle board, the vertical board is long strip board, vertical fixed in the bottom plate rear side surface, the upper cross board is long strip, and the horizontal fixed is in the vertical board just above, and this constitutes the basic frame of welding frock, the flange positioning mechanism is fixed in the bottom plate front side surface, and includes, the positioning step, the flat mouth positioning column, the bolt positioning column, the pressure head support, the pressure rod, cylinder I and cylinder seat I, the air inlet pipe positioning mechanism is fixed below the upper cross board front end, and includes, round mouth positioning column and cylinder II. The utility model discloses portable engine silencer air inlet pipe flange welding frock's beneficial technical effects are accurate to the flange and air inlet pipe are positioned and clamped, and the product after welding can satisfy all design requirements simultaneously.

Description

Technical Field

[0001] This utility model relates to a welding technology for the intake pipe flange of a portable engine muffler, and particularly to a welding fixture for the intake pipe flange of a portable engine muffler. Background Technology

[0002] The portable engine muffler's intake pipe is an irregularly shaped tube, with one end round and the other flat, and the entire pipe's axis is a three-dimensional curve. Additionally, a flange is welded to the flat end for connection to the intake pipe, and the flange plane forms an angle with the plane of the other end (see appendix). Figure 1 , 2 (3, 4). According to relevant technical requirements, the welded flange plane must be parallel to the flat end plane of the intake pipe and at a set angle to the round end plane of the intake pipe. In addition, the line connecting the two bolt holes of the flange must coincide with the symmetry line of the flat end.

[0003] The existing portable engine muffler intake pipe flange welding method uses a simple clamp to clamp and weld the flange and intake pipe. Due to vibration and deformation during welding, it is difficult for the welded product to meet the above design requirements at the same time.

[0004] Clearly, the existing welding method for the intake pipe flange of portable engine mufflers has problems such as difficulty in meeting all design requirements at the same time. Summary of the Invention

[0005] To address the problem that existing portable engine muffler intake pipe flange welding methods cannot simultaneously meet all design requirements, this utility model proposes a portable engine muffler intake pipe flange welding fixture.

[0006] This utility model relates to a portable engine muffler intake pipe flange welding fixture, comprising a base plate, a vertical plate, an upper horizontal plate, a flange positioning mechanism, and an intake pipe positioning mechanism. The base plate is rectangular; the vertical plate is a long strip fixed vertically to the rear surface of the base plate; the upper horizontal plate is a long strip fixed horizontally above the vertical plate, thus forming the basic framework of the welding fixture. The flange positioning mechanism is fixed to the front surface of the base plate and includes a positioning step, a flat-mouth positioning post, a bolt positioning post, a pressure head support, a pressure rod, cylinder I, and cylinder seat I. The cross-sectional shape of the positioning step is similar to that of the flange outer... The positioning steps are identical in shape, and their surfaces are inclined. The inclination angle of the inclined surface of the positioning step is such that the axis of the circular section of the qualified air intake pipe is vertical after the flat end face of the qualified air intake pipe is placed on the positioning step surface. The cross-sectional shape of the flat-mouth positioning post matches the inner hole of the flange and the inner hole of the qualified air intake pipe, and is fixed in the middle of the positioning step surface. The bolt positioning posts are two cylinders with the same diameter as the flange bolt holes, and are fixed on both sides of the flat-mouth positioning post. The line connecting the centers of the two bolt positioning posts coincides with the line of symmetry of the flat-mouth positioning post, and the spacing is the same as that of the flange. The bolt holes are identical; the pressure head support is fixed between the vertical plate and the flat-mouth positioning post; the pressure rod is L-shaped, and the bent part of the L-shaped pressure rod is hinged to the pressure head support; the front end of the L-shaped pressure rod is provided with a U-shaped opening, thereby forming two pressure feet, and a blind hole with a diameter matching the bolt positioning post is provided on the lower end face of the pressure feet; the rear end of the L-shaped pressure rod is hinged to the end of the piston of cylinder I; the fixed position and height of the pressure rod are such that when the piston of cylinder I extends and pushes the pressure rod to the pressing position, the blind holes on the two pressure feet at the front end of the pressure rod are just fitted onto the bolt positioning post; Cylinder I is hinged and fixed to the inside of the vertical plate via cylinder seat I; the intake pipe positioning mechanism is fixed below the front end of the upper horizontal plate and includes a round-mouth positioning post and cylinder II; the front end of the round-mouth positioning post is provided with a cylindrical step with a diameter matching the inner diameter of the round opening of the qualified intake pipe, and the rear end is fixedly connected to the piston end of cylinder II; the piston of cylinder II is fixed vertically downward on the bottom surface of the upper horizontal plate, and its fixed position is based on the fact that the axis of the round-mouth positioning post connected to the piston end of cylinder II coincides with the axis of the round opening section of the qualified intake pipe after the flat end face of the qualified intake pipe is placed on the surface of the positioning step.

[0007] Furthermore, a triangular reinforcing rib I is provided between the base plate and the vertical edge.

[0008] Furthermore, a triangular reinforcing rib II is provided between the vertical plate and the upper horizontal plate.

[0009] The beneficial technical effect of this portable engine muffler intake pipe flange welding fixture is that it can accurately position and clamp the flange and intake pipe, ensuring that the welded product can meet all design requirements at the same time. Attached Figure Description

[0010] Appendix Figure 1 This is a three-dimensional schematic diagram of the intake pipe of a portable engine muffler;

[0011] Appendix Figure 2 This is a three-dimensional schematic diagram of the intake pipe of a portable engine muffler from another angle;

[0012] Appendix Figure 3 This is a three-dimensional schematic diagram of the intake pipe of a portable engine muffler from another angle;

[0013] Appendix Figure 4 This is a cross-sectional view of the intake pipe of a portable engine muffler;

[0014] Appendix Figure 5 This is a three-dimensional schematic diagram of the portable engine muffler intake pipe flange welding fixture of this utility model;

[0015] Appendix Figure 6 This is a three-dimensional schematic diagram of the welding fixture for the intake pipe flange of the portable engine muffler of this utility model in the clamping state.

[0016] In the diagram, a is the intake pipe, b is the flange, 1 is the base plate, 1-1 is the triangular reinforcing rib I, 1-2 is the triangular reinforcing rib II; 2 is the vertical plate, 3 is the upper horizontal plate; 4 is the flange positioning mechanism, 4-1 is the positioning step, 4-2 is the flat-mouth positioning post, 4-3 is the bolt positioning post, 4-4 is the pressure head support, 4-5 is the pressure rod, 4-6 is the blind hole, 4-7 is the cylinder I, 4-8 is the cylinder seat I; 5 is the intake pipe positioning mechanism, 5-1 is the round-mouth positioning post, 5-2 is the cylinder II.

[0017] The following description, in conjunction with the accompanying drawings and specific embodiments, further illustrates the welding fixture for the intake pipe flange of the portable engine muffler of this utility model. Detailed Implementation

[0018] See appendix Figure 5 , 6This utility model relates to a portable engine muffler intake pipe flange welding fixture, comprising a base plate 1, a vertical plate 2, an upper horizontal plate 3, a flange positioning mechanism 4, and an intake pipe positioning mechanism 5. The base plate is rectangular; the vertical plate is a long strip fixed vertically to the rear surface of the base plate; the upper horizontal plate is a long strip fixed horizontally above the vertical plate, thus forming the basic framework of the welding fixture. The flange positioning mechanism is fixed to the front surface of the base plate and includes a positioning step 4-1, a flat-mouth positioning post 4-2, a bolt positioning post 4-3, a pressure head support 4-4, a pressure rod 4-5, a cylinder I 4-7, and a cylinder seat I 4. -8; The cross-sectional shape of the positioning step is the same as that of the flange, and the surface of the positioning step is an inclined surface; the inclination angle of the inclined surface of the positioning step is based on the fact that the axis of the circular section of the qualified air intake pipe is vertical after the flat end face of the qualified air intake pipe is placed on the surface of the positioning step; the cross-sectional shape of the flat-mouth positioning post matches the inner hole of the flange and the inner hole of the flat mouth of the qualified air intake pipe, and is fixed in the middle of the surface of the positioning step; the bolt positioning post is a cylinder with the same diameter as the flange bolt hole, and there are two of them, which are fixed on both sides of the flat-mouth positioning post respectively; the line connecting the centers of the two bolt positioning posts is aligned with the line connecting the two bolt positioning posts. The lines are aligned and the spacing is the same as the flange bolt holes; the pressure head support is fixed between the vertical plate and the flat-mouth positioning post; the pressure rod is L-shaped, and the bent part of the L-shaped pressure rod is hinged to the pressure head support; the front end of the L-shaped pressure rod is provided with a U-shaped opening, thereby forming two pressure feet, and the lower end face of the pressure feet is provided with blind holes 4-6 with a diameter matching the bolt positioning post; the rear end of the L-shaped pressure rod is hinged to the end of the piston of cylinder I; the fixed position and height of the pressure rod are such that when the piston of cylinder I extends and pushes the pressure rod to the pressing position, the blind holes on the two pressure feet at the front end of the pressure rod are just fitted onto the bolt positioning post. The cylinder I is hinged and fixed to the inner side of the vertical plate via the cylinder seat I; the air intake pipe positioning mechanism is fixed below the front end of the upper horizontal plate, including a round-mouth positioning post 5-1 and a cylinder II 5-2; the front end of the round-mouth positioning post is provided with a cylindrical step with a diameter matching the inner diameter of the round opening of the qualified air intake pipe, and the rear end is fixedly connected to the piston end of the cylinder II; the piston of the cylinder II is fixed vertically downward on the bottom surface of the upper horizontal plate, and its fixed position is based on the fact that after the axis of the round-mouth positioning post connected to the piston end of the cylinder II is placed on the surface of the positioning step, the axis of the round opening section of the qualified air intake pipe coincides.In practical use, the flange is placed on the positioning step manually or with a robotic arm. Since the cross-section of the flat-mouth positioning post matches the inner hole of the flange, and the spacing between the two bolt positioning posts is the same as the flange bolt holes, the flange is actually fitted onto the flat-mouth positioning post and the bolt positioning post, achieving accurate flange positioning. Cylinder I is activated, pushing the pressure rod downwards. The blind hole on the pressure foot at the front end of the pressure rod fits onto the bolt positioning post and clamps the flange, ensuring its positioning and clamping. The flat end of the intake pipe to be welded is placed on the positioning step manually or with a robotic arm. Since the cross-section of the flat-mouth positioning post matches the inner hole of the qualified intake pipe flat end, the spatial orientation of the intake pipe flat end is initially positioned by the flat-mouth positioning post when placed on the positioning step. Activate cylinder II to push the circular positioning pin downwards. The cylindrical step at the front end of the positioning pin extends into the inner hole of the intake pipe's circular opening. Since the diameter of the cylindrical step at the front end of the positioning pin matches the inner diameter of the qualified intake pipe's circular opening, accurate positioning and clamping of the intake pipe are achieved once the cylindrical step at the front end of the positioning pin extends into the inner hole of the intake pipe's circular opening. Under these conditions, whether welding manually or mechanically, even with slight vibration or deformation, the stable clamping ensures good welding quality, guaranteeing that the welded product meets all design requirements.

[0019] As one of the preferred technical solutions, a triangular reinforcing rib I1-1 is provided between the base plate and the vertical side; a triangular reinforcing rib II1-2 is provided between the vertical plate and the upper horizontal plate. This further increases the strength and rigidity of the welding fixture frame, thus further ensuring welding quality.

[0020] Obviously, the beneficial technical effect of this portable engine muffler intake pipe flange welding fixture is that it can accurately position and clamp the flange and intake pipe, ensuring that the welded product can meet all design requirements at the same time.

Claims

1. A portable engine muffler intake pipe flange welding fixture, characterized in that, The welding fixture includes a base plate, a vertical plate, an upper horizontal plate, a flange positioning mechanism, and an air inlet pipe positioning mechanism; the base plate is a rectangular plate; the vertical plate is a long strip plate, which is vertically fixed to the rear surface of the base plate; The upper horizontal plate is elongated and fixed horizontally above the vertical plate, thus forming the basic framework of the welding fixture. The flange positioning mechanism is fixed to the front surface of the base plate and includes a positioning step, a flat-mouth positioning post, a bolt positioning post, a pressure head support, a pressure rod, cylinder I, and cylinder seat I. The cross-sectional shape of the positioning step is the same as that of the flange, and the surface of the positioning step is an inclined surface. The inclination angle of the inclined surface of the positioning step is based on the fact that the axis of the circular section of the qualified air intake pipe is vertical after the flat end face of the qualified air intake pipe is placed on the surface of the positioning step. The cross-sectional shape of the flat-mouth positioning post matches the inner hole of the flange and the inner hole of the flat mouth of the qualified air intake pipe, and is fixed in the middle of the surface of the positioning step. The bolt positioning post is a cylinder with the same diameter as the flange bolt hole, and there are two of them, which are fixed on both sides of the flat-mouth positioning post. The line connecting the centers of the two bolt positioning posts coincides with the line of symmetry of the flat-mouth positioning post, and the spacing is the same as that of the flange bolt holes. The pressure head support is fixed between the vertical plate and the flat-mouth positioning post. The pressure rod is L-shaped, and the bending of the L-shaped pressure rod is... The L-shaped pressure rod is hinged to the pressure head support; the front end of the L-shaped pressure rod has a U-shaped opening, forming two pressure feet, and the lower end face of the pressure feet has a blind hole with a diameter matching the bolt positioning post; the rear end of the L-shaped pressure rod is hinged to the end of the piston of cylinder I; the fixed position and height of the pressure rod are such that when the piston of cylinder I extends and pushes the pressure rod to the pressing position, the blind holes on the two pressure feet at the front end of the pressure rod just fit onto the bolt positioning post; cylinder I is hinged and fixed to the inside of the vertical plate through cylinder seat I; the... The intake pipe positioning mechanism is fixed below the front end of the upper horizontal plate and includes a round-mouth positioning post and cylinder II. The front end of the round-mouth positioning post is provided with a cylindrical step with a diameter matching the inner diameter of the round opening of the qualified intake pipe, and the rear end is fixedly connected to the piston end of cylinder II. The piston of cylinder II is fixed vertically downward on the bottom surface of the upper horizontal plate. Its fixed position is based on the fact that after the axis of the round-mouth positioning post connected to the piston end of cylinder II is placed on the surface of the positioning step, the axis of the round opening section of the qualified intake pipe coincides.

2. The portable engine muffler intake pipe flange welding fixture according to claim 1, characterized in that, A triangular reinforcing rib I is provided between the base plate and the vertical side.

3. The portable engine muffler intake pipe flange welding fixture according to claim 1 or 2, characterized in that, A triangular reinforcing rib II is provided between the vertical plate and the upper horizontal plate.

Images