Welding equipment for exhaust manifold

Abstract

The exhaust manifold welding equipment comprises a bottom plate and a welding placement frame, the welding placement frame is connected with the bottom plate, a plurality of placement grooves are formed in the upper surface of the welding placement frame, side plates are arranged on the left side and the right side of the welding placement frame, air inlets are symmetrically formed in the right side plate, and an air outlet is formed in the left side plate; a plurality of supporting sleeves are arranged in the welding containing frame, the upper ends of the supporting sleeves penetrate through the containing groove, and the supporting sleeves are connected with the bottom plate. A locking assembly is arranged in the supporting sleeve; a cooling coil pipe is fixedly arranged on the inner wall of the welding placement frame below the placement groove, the cooling coil pipe comprises a plurality of annular cooling frames, and every two annular cooling frames communicate with each other through a pipeline; the two sides of the upper end face of the welding containing frame are obliquely arranged, and a plurality of air exhaust grooves are formed in the inclined face. According to the welding flue gas treatment device, welding flue gas can be effectively treated, and the safety of the welding process is improved.

Description

Technical Field

[0001] This invention relates to the field of automotive parts processing technology, and in particular to a welding device for exhaust manifolds. Background Technology

[0002] The exhaust manifold is a crucial component of a car engine's exhaust system. Its structure typically includes an intake passage corresponding to the exhaust port of the engine cylinders, with an intake flange at the intake. This flange has a connection port corresponding to the exhaust manifold's intake port. During manufacturing, the exhaust manifold's intake port must be aligned with this connection port on the flange, and then welded along the connection port to attach the flange to the exhaust manifold. During welding, the flange and exhaust manifold must be secured to ensure that the exhaust manifold's intake port remains aligned with the flange's connection port throughout the welding process, preventing misalignment. Existing fixing devices are complex, have poor positioning accuracy, and are inconvenient to operate. Furthermore, the fumes generated during welding can obstruct the operator's vision, and direct contact with these fumes can harm their health.

[0003] A search revealed that patent document CN111761280B discloses a dual radiator for welding exhaust manifold flanges, comprising: a cold water delivery assembly including annular cooling positions and a first connecting channel connecting adjacent annular cooling positions, with inlets and outlets at both ends of the cold water delivery assembly; a cold air delivery assembly including air supply positions corresponding to each annular cooling position and a second connecting channel connecting adjacent air supply positions; an air inlet at one end of the cold air delivery assembly; cooling chambers communicating with each air supply position on the same side, with each cooling chamber able to pass through an opening at the center of the corresponding annular cooling position; an air outlet at the top of each cooling chamber; and a receiving platform containing the cold water delivery assembly and the cold air delivery assembly. This invention can avoid defects caused by flange bending deformation through multiple interactive heat exchange during the exhaust manifold flange welding process, thus ensuring the flatness of the finished product.

[0004] When using the aforementioned dual radiator, the exhaust manifold is positioned using a cooling chamber with a hemispherical top. However, additional auxiliary fixing mechanisms are still needed to secure the exhaust manifold, or manual pressing of the exhaust manifold is required to ensure its stability during welding, which is quite troublesome. Summary of the Invention

[0005] The purpose of this invention is to provide a welding device for exhaust manifolds, which can initially position the exhaust manifold using a support sleeve, and then fix the position of the exhaust manifold with a high-pressure coolant-driven locking assembly. This effectively reduces the use of cumbersome external fixing mechanisms during the welding process, improves the welding efficiency of exhaust manifolds, and can effectively treat welding fumes, thereby improving the safety of the welding process.

[0006] The present invention adopts the following technical solution: A welding device for an exhaust manifold includes a base plate and a welding placement frame. The welding placement frame is connected to the base plate. The upper surface of the welding placement frame is provided with several placement slots for placing flange plates. Side plates are provided on both the left and right sides of the welding placement frame. The right side plate is symmetrically provided with air inlets, and the left side plate is provided with air outlets. The welding placement frame is equipped with several support sleeves, the same number as the placement slot. The upper end of the support sleeve passes through the placement slot and is connected to the base plate. The support sleeve is equipped with a locking component for locking the exhaust manifold. A cooling coil is fixedly installed on the inner wall of the welding placement frame below the placement slot. The cooling coil includes several annular cooling frames, and each pair of annular cooling frames is connected by a pipe. The upper surface of the welding placement frame is inclined on both sides, and several neatly arranged air extraction grooves are opened on the inclined surface.

[0007] Optionally, the dimensions of the placement slot are adapted to the flange plate, and the dimensions of the support sleeve are adapted to the exhaust manifold.

[0008] Optionally, an annular groove is provided on the circumferential surface of the support sleeve, the position of which corresponds to the welding position of the flange plate and the exhaust manifold. A through groove communicating with the inner cavity is symmetrically provided on the circumferential surface of the support sleeve near the upper position of the annular groove.

[0009] Optionally, the upper and lower walls of the annular groove are provided with several interconnected ventilation slots in a circular pattern.

[0010] Optionally, a top cover is provided on the upper end face of the support sleeve, the top cover is threaded with the support sleeve, and air inlet slots are symmetrically opened on the surface of the top cover.

[0011] Optionally, the locking assembly includes a lower frame, an upper frame, and symmetrically arranged T-shaped top blocks. The lower frame and the upper frame are fixed together, and the upper frame is fixed to the top cover. Sliding grooves are symmetrically provided in both the lower frame and the upper frame, and a connecting groove is provided between the two sliding grooves.

[0012] Optionally, the T-shaped top block is slidably disposed in the slide groove, and the outer surface of the T-shaped top block is an arc-shaped surface that matches the inner wall of the exhaust manifold. Two sets of return springs are symmetrically fixedly connected between the T-shaped top block and the inner wall of the slide groove.

[0013] Optionally, connecting blocks are symmetrically slidably arranged in the connecting groove. Two slide rails are fixedly arranged on both sides of the inner wall of the connecting groove. The connecting blocks slide in the slide rails. A groove is opened on the inner side of the T-shaped top block. Two connecting rods are rotatably arranged in the groove. The other ends of the two connecting rods are respectively hinged to the upper and lower connecting blocks.

[0014] Optionally, a water inlet frame is provided on the lower surface of the lower frame, and a push block is vertically slidably arranged inside the water inlet frame. A connecting shaft is provided on the upper surface of the push block. The connecting shaft passes through the upper end face of the water inlet frame and the lower end face of the lower frame and slides in contact with it. A spring is sleeved on the outside of the connecting shaft.

[0015] Optionally, the lower end of the water inlet frame is connected to an L-shaped water inlet pipe, the upper end of the water inlet pipe corresponds to the position of the push block, the left side of the water inlet frame is connected to a connecting pipe one, between every two water inlet frames, one end of the water inlet pipe is connected to the connecting pipe one, the outer end of the leftmost connecting pipe one is connected to the leftmost annular cooling frame by a connecting pipe two, a support plate is fixedly installed below the support sleeve, the water inlet pipe passes through the support plate, and the support plate supports the water inlet pipe.

[0016] In summary, the present invention has the following beneficial effects: 1. In this invention, the exhaust manifold can be initially positioned by the support sleeve, and then the position of the exhaust manifold can be fixed by the high-pressure coolant driven locking component, which effectively reduces the use of cumbersome external fixing mechanisms during the welding process and improves the welding efficiency of the exhaust manifold. 2. In this invention, when air enters through the air inlet, cold air will pass through the inner cavity of the welding placement frame from right to left, causing negative pressure in the air extraction groove. Then, the outside gas will be drawn into the inner cavity of the welding placement frame through the air extraction groove. At this time, the fumes generated during the welding process will also enter the welding placement frame along the air extraction groove and then be discharged through the air outlet. The fumes will no longer obstruct the operator's vision and will not be inhaled by the operator, effectively avoiding the harm of welding fumes to the operator and improving the safety of the welding process. 3. In this invention, as welding begins, the external air supply mechanism starts to send cold air into the air inlet. The cold air passes through the inner cavity of the welding placement frame and is discharged from the air outlet. During this process, the cold air will carry away the heat on the cooling coil. At the same time, the welding fumes generated can be drawn into the welding placement frame through the air extraction groove and then discharged through the air outlet. When the cold air passes through, the external cold air will be drawn into the support sleeve from the exhaust outlet at the upper end of the exhaust manifold through the air inlet groove of the top cover, and then enter the welding placement frame from the lower end of the support sleeve. This can effectively cool the support sleeve. The cold air will also pass through the ventilation groove on the annular groove to carry away the heat at the weld position, greatly improving the welding effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the welding placement frame of the present invention; Figure 3 This is an exploded view of the present invention; Figure 4 A cross-sectional view of the present invention Figure 1 ; Figure 5 This is a schematic diagram of the support sleeve of the present invention; Figure 6 A cross-sectional view of the support sleeve of the present invention. Figure 1 ; Figure 7 In this invention Figure 6 A magnified view of the details at point A; Figure 8 This is a schematic diagram of the locking component of the present invention. Figure 1 ; Figure 9 This is a schematic diagram of the locking component of the present invention. Figure 2 ; Figure 10 A cross-sectional view of the support sleeve of the present invention. Figure 2 ; Figure 11 A cross-sectional view of the support sleeve of the present invention. Figure 3 ; Figure 12 This is a schematic diagram of the cooling coil structure of the present invention; Figure 13 A cross-sectional view of the entire invention Figure 2 ; Figure 14 In this invention Figure 13 A magnified view of the details at point B; Figure 15 In this invention Figure 13 A magnified view of the details at point C.

[0018] In the diagram: 1. Base plate; 2. Welding placement frame; 3. Flange plate; 4. Exhaust manifold; 5. Drain pipe; 6. Support sleeve; 7. Locking assembly; 8. Cooling coil; 21. Side plate; 211. Air inlet; 22. Placement slot; 23. Exhaust slot; 24. Air outlet; 51. Water inlet pipe; 52. Connecting pipe one; 53. Water inlet frame; 61. Annular groove; 611. Support plate; 62. Ventilation slot; 63. Through groove; 64. Top cover; 641. Air inlet slot; 71. Lower frame; 711. Slide groove; 712. Slide rail; 713. Connecting groove; 72. Upper frame; 73. T-shaped top block; 731. Return spring one; 732. Groove; 74. Push block; 741. Spring two; 75. Connecting block; 76. Connecting rod; 81. Connecting pipe two. Detailed Implementation

[0019] The principles and spirit of the present invention will be explained in detail below with reference to several representative embodiments.

[0020] Please see Figure 1-15 The present invention will now be described in detail with reference to the accompanying drawings and embodiments: like Figure 1-2 As shown, a welding device for an exhaust manifold includes a base plate 1 and a welding placement frame 2. The welding placement frame 2 is fixed to the upper surface of the base plate 1 by bolts. The upper surface of the welding placement frame 2 is provided with a plurality of placement slots 22 for placing flange plates 3. The size of the placement slots 22 is adapted to the flange plates 3, and the flange plates 3 are positioned by the placement slots 22. The welding placement frame 2 is provided with side plates 21 on both the left and right sides. The right side plate 21 is symmetrically provided with air inlets 211, and the left side plate 21 is provided with air outlets 24. Cold air is introduced into the air inlets 211 through an external air supply mechanism to carry out the welding heat in the welding placement frame 2, and then discharged through the air outlets 24. The welding placement frame 2 is provided with a number of support sleeves 6, which are the same number as the placement groove 22. The upper end of the support sleeve 6 passes through the placement groove 22 and does not affect the placement of the flange plate 3. The lower end of the support sleeve 6 is fixed to the base plate 1 by bolts. The size of the support sleeve 6 is adapted to the exhaust manifold 4. The branch pipe opening of the exhaust manifold 4 is put on the support sleeve 6 to initially limit the exhaust manifold 4. The support sleeve 6 is equipped with a locking component 7, which locks the position of the exhaust manifold 4 that is sleeved on the support sleeve 6, so that the operator does not need to hold the exhaust manifold 4 by hand during the welding process. A cooling coil 8 is fixedly installed on the inner wall of the welding placement frame 2 below the placement groove 22. The cooling coil 8 includes several annular cooling frames, and each pair of annular cooling frames is connected by a pipe. The cooling coil 8 can effectively carry away the welding heat and improve the heat dissipation effect during the welding process.

[0021] The aforementioned air supply mechanism is existing technology and will not be drawn or described in detail here.

[0022] like Figure 2-4 As shown, in this embodiment, the upper surface of the welding placement frame 2 is inclined on both sides, and a number of neatly arranged air extraction grooves 23 are provided on the inclined surface. The air extraction grooves 23 are connected to the inner cavity of the welding placement frame 2. The exhaust trough 23 is set at an angle. When air enters through the air inlet 211, the cold air will pass through the inner cavity of the welding placement frame 2 from right to left, causing the exhaust trough 23 to generate negative pressure. Then, the outside air will be drawn into the inner cavity of the welding placement frame 2 through the exhaust trough 23. At this time, the fumes generated during the welding process will also enter the welding placement frame 2 along the exhaust trough 23 and then be discharged through the air outlet 24. The fumes will no longer obstruct the operator's vision and will not be inhaled by the operator, effectively avoiding the harm of welding fumes to the operator and improving the safety of the welding process.

[0023] like Figure 5-7 As shown, in this embodiment, an annular groove 61 is provided on the circumferential surface of the support sleeve 6. The position of the annular groove 61 corresponds to the welding position of the flange plate 3 and the exhaust manifold 4. The welding position is reserved by the annular groove 61 to avoid deformation of the weld during the welding process, which would cause the exhaust manifold 4 to be connected to the support sleeve 6. The upper and lower walls of the annular groove 61 are provided with several interconnected ventilation grooves 62. The heat from the weld can be carried away through the ventilation grooves 62, thereby improving the heat dissipation effect of the welding.

[0024] like Figure 5-7 As shown, in this embodiment, a top cover 64 is provided on the upper end face of the support sleeve 6. The top cover 64 is threadedly engaged with the support sleeve 6. The surface of the top cover 64 is symmetrically provided with air inlet slots 641. External cold air can pass through the air inlet slots 641 from the exhaust outlet of the exhaust manifold 4 into the support sleeve 6, and then enter the welding placement frame 2 from the lower end of the support sleeve 6. The circumferential surface of the support sleeve 6 is symmetrically provided with a through groove 63 that communicates with the inner cavity.

[0025] like Figure 8-9 As shown, in this embodiment, the locking component 7 includes a lower frame 71, an upper frame 72 and symmetrically arranged T-shaped top blocks 73. The lower frame 71 and the upper frame 72 are fixedly connected by bolts, the upper frame 72 is fixedly connected to the top cover 64 by bolts, and the T-shaped top blocks 73 slide through the through groove 63. The lower frame 71 and the upper frame 72 are symmetrically provided with sliding grooves 711, and a connecting groove 713 is provided between the two sliding grooves 711. The T-shaped top block 73 is slidably disposed in the sliding groove 711, and the outer side of the T-shaped top block 73 is an arc-shaped surface that is adapted to the inner wall of the exhaust manifold 4. Two sets of return springs 731 are symmetrically fixed between the T-shaped top block 73 and the inner wall of the slide groove 711. The T-shaped top block 73 is used to lock and limit the inner wall of the exhaust manifold 4, and the T-shaped top block 73 is then reset by the return springs 731.

[0026] like Figure 8-9 As shown, in this embodiment, a connecting block 75 is symmetrically slidably arranged in the connecting groove 713. Two slide rails 712 are fixedly arranged on both sides of the inner wall of the connecting groove 713. The connecting block 75 slides in the slide rails 712. The slide rails 712 guide the connecting block 75 to prevent the connecting block 75 from deviating when sliding. The inner side of the T-shaped top block 73 is provided with a groove 732. Two connecting rods 76 are arranged crosswise and rotatably in the groove 732. The other ends of the two connecting rods 76 are respectively hinged to the upper and lower connecting blocks 75. The lifting and lowering of the lower connecting block 75 drives the connecting rod 76 to push the outer T-shaped top block 73 to slide within the slide groove 711.

[0027] like Figure 8-9 As shown, in this embodiment, a water inlet frame 53 is fixedly installed on the lower surface of the lower frame 71 by bolts. A push block 74 is vertically slidably installed inside the water inlet frame 53. A connecting shaft is fixedly installed on the upper surface of the push block 74. The connecting shaft passes through the upper end face of the water inlet frame 53 and the lower end face of the lower frame 71 and slides in cooperation. A spring 741 is sleeved on the outside of the connecting shaft to assist the push block 74 in resetting.

[0028] like Figure 8-9 and Figure 15 As shown, in this embodiment, the lower end face of the water inlet frame 53 is connected to an L-shaped water inlet pipe 51, and the upper end of the water inlet pipe 51 corresponds to the position of the push block 74. The coolant lifts the push block 74 through the water inlet pipe 51, thereby driving the connecting block 75 to move. The left side of the water inlet frame 53 is connected to the connecting pipe 52. Between every two water inlet frames 53, one end of the water inlet pipe 51 is connected to the connecting pipe 52. The rightmost water inlet pipe 51 is connected to the water inlet end of the external coolant inlet mechanism. The outer end of the leftmost connecting pipe 52 is connected to the leftmost annular cooling frame by the connecting pipe 81. The rightmost annular cooling frame is connected to the inlet end of the coolant inlet mechanism; The coolant inlet mechanism discharges coolant into the inlet pipe 51, and then through the connecting pipe 81 into the annular cooling frame, carrying away the welding heat on the flange plate 3.

[0029] The aforementioned coolant inlet mechanism is existing technology and will not be drawn or described in detail here.

[0030] like Figure 10 As shown in this embodiment, a support plate 611 is fixedly installed below the support sleeve 6, and the water inlet pipe 51 passes through the support plate 611 to support the water inlet pipe 51.

[0031] The working principle of this equipment is as follows: Place the flange plates 3 to be welded into the placement groove 22 in sequence, and then insert the exhaust manifold 4 into the support sleeve 6. At this time, the flange plates 3 and the exhaust manifold 4 are in contact with each other, and the support sleeve 6 can provide initial support for the exhaust manifold 4 so that the exhaust manifold 4 will not shake. Then, the external coolant inlet mechanism is activated to send high-pressure coolant into the inlet pipe 51. Then, the push block 74 is lifted up, the push block 74 rises, the spring 2 741 is compressed, the upper and lower connecting blocks 75 move relative to each other, driving the connecting rods 76 on both sides to push the T-shaped top block 73 to contact the inner wall of the exhaust manifold 4 and lock the exhaust manifold 4. Then the coolant enters the annular cooling frame through each inlet pipe 51 and connecting pipe 52. After passing through the cooling coil 8, the coolant re-enters the coolant inlet mechanism to form a circulation. Then the welding process can begin. As welding begins, the external air supply mechanism starts to send cold air into the air inlet 211. The cold air passes through the inner cavity of the welding placement frame 2 and is discharged from the air outlet 24. During this process, the cold air will carry away the heat on the cooling coil 8. At the same time, the welding fumes generated can be drawn into the welding placement frame 2 through the air extraction groove 23 and then discharged through the air outlet 24. When the cold air passes through, the external cold air will be drawn into the support sleeve 6 through the air inlet groove 641 of the top cover 64 from the exhaust outlet at the upper end of the exhaust manifold 4. Then it will enter the welding placement frame 2 from the lower end of the support sleeve 6, which can effectively cool the support sleeve 6. The cold air will also pass through the ventilation groove 62 on the annular groove 61 to carry away the heat at the weld position, greatly improving the welding effect.

[0032] The specification and claims use certain terms to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0033] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0034] The foregoing description illustrates and describes several preferred embodiments of this application. However, as previously stated, it should be understood that this application is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the application concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this application should be within the protection scope of the appended claims.

Claims

1. A welding apparatus for an exhaust manifold, characterized by: The welding placement frame is connected with the bottom plate, and the upper surface of the welding placement frame is provided with a plurality of placement grooves for placing flange plates. A plurality of support sleeves are arranged in the welding placement frame, and the number of the support sleeves is the same as that of the placement grooves. The support sleeve is connected with the bottom plate. The support sleeve is provided with a locking assembly for locking the exhaust manifold. The cooling coil is fixedly arranged on the inner wall of the welding placement frame below the placement groove, and the cooling coil comprises a plurality of annular cooling frames.

2. A welding apparatus for an exhaust manifold as defined in claim 1, wherein: The upper end surface of the welding placement frame is obliquely arranged, and a plurality of air extraction grooves are arranged on the inclined surface.

3. A welding apparatus for an exhaust manifold as defined in claim 1, wherein: The size of the placement groove is matched with the flange plate, and the size of the support sleeve is matched with the exhaust manifold.

4. A welding apparatus for an exhaust manifold as defined in claim 3, wherein: The circumferential surface of the support sleeve is provided with an annular groove, and the position of the annular groove corresponds to the welding position of the flange plate and the exhaust manifold.

5. The exhaust manifold welding apparatus of claim 1, wherein: The upper and lower walls of the annular groove are both provided with a plurality of ventilation grooves.

6. A welding apparatus for an exhaust manifold as defined in claim 1, wherein: The upper end surface of the support sleeve is provided with a top cover, and the top cover is threadedly connected with the support sleeve.

7. A welding apparatus for an exhaust manifold as defined in claim 6 wherein: The locking assembly comprises a lower frame body, an upper frame body and a T-shaped top block arranged symmetrically.

8. A welding apparatus for an exhaust manifold as defined in claim 7, wherein: The T-shaped top block is slidably arranged in the sliding groove, and the outer side surface of the T-shaped top block is an arc surface matched with the inner wall of the exhaust manifold.

9. A welding apparatus for an exhaust manifold as defined in claim 8, wherein: The inner wall of the sliding groove is fixedly provided with two groups of reset springs.

10. A welding apparatus for an exhaust manifold as defined in claim 9, wherein: The connecting block is slidably arranged in the connecting groove, and the inner side surface of the T-shaped top block is provided with a groove. The lower surface of the lower frame body is provided with a water inlet frame, and the water inlet frame is vertically slidably provided with a pushing block. The lower end surface of the water inlet frame is connected with an L-shaped water inlet pipe, and the upper end of the water inlet pipe corresponds to the position of the pushing block. The left side surface of the water inlet frame is connected with a connecting pipe, and one end of the water inlet pipe is connected with the connecting pipe. The support sleeve is fixedly provided with a support plate below, and the water inlet pipe penetrates through the support plate.

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