A mold for flaring out automobile exhaust pipes

Abstract

This utility model belongs to the field of exhaust pipe flaring technology, specifically a molding die for flaring automotive exhaust pipes. It includes a mold frame, a moving mold inside, and a positioning clamp at the bottom. A flaring block is detachably installed at the lower end of the moving mold, and a coaxial through hole is formed inside the flaring block. A hollow tube is movably installed inside the through hole, and a tapered, adjustable-angle folding tube is fixedly connected to the lower end of the hollow tube. The lower end of the folding tube is flared outwards. The hollow tube and the folding tube have a double-layer structure, forming a cavity between the two layers. A filter membrane permeable to lubricating fluid is installed on the outer side of the lower end of the folding tube. This utility model can automatically apply lubricating fluid before the flaring operation, eliminating the need for additional application steps. Furthermore, the flaring operation can be performed directly after application without waiting, allowing the lubricating fluid to fully function and ensuring stable flaring operations.

Description

Technical Field

[0001] This utility model belongs to the field of exhaust pipe flaring technology, and in particular relates to a molding die for flaring automobile exhaust pipes. Background Technology

[0002] Automotive exhaust pipe flaring usually refers to the process or structure in which, after the exhaust pipe is formed, the opening is widened into a trumpet or cone shape by a hydraulic cylinder driving a flaring block at a specific location. This type of flaring is commonly found at the interface between exhaust pipe sections, such as the inlet / outlet end of the muffler, the connection between the middle section and the front / tail section, etc.

[0003] A search revealed Chinese utility model patent CN222519759U, which discloses a flaring mold for an automotive exhaust pipe. The mold includes a base plate with a bracket connected to its top. A first hydraulic cylinder is connected through one side of the bracket, and a flaring block is connected to the output end of the first hydraulic cylinder. This utility model, through its centering component structure, allows for rapid centering of the exhaust pipe body. The exhaust pipe body passes through two connecting plates via a centering groove. Twisting the connecting block causes two screws to rotate, resulting in relative movement of two pressure plates on the screws and rods. The arc groove clamps the exhaust pipe body, positioning it in the center of the centering groove. This achieves rapid centering of the exhaust pipe body with the flaring block, improving the flaring efficiency and enhancing the flaring quality of the exhaust pipe body.

[0004] However, when this device flares the pipe, it is the same as the traditional flaring method. It is necessary to apply lubricating oil to the inner wall of the pipe port in advance. The inconvenience of application affects the overall work efficiency and cannot adapt to the short construction period of large-scale flaring operations.

[0005] To address the aforementioned issues, this application proposes a mold for forming the flaring of an automotive exhaust pipe. Utility Model Content

[0006] The purpose of this utility model is to provide a mold for forming the flaring of an automobile exhaust pipe, which solves the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0008] This utility model is a mold for forming an flared exhaust pipe for automobiles, including a mold frame and its internal moving mold and bottom positioning clamp;

[0009] A flared block is detachably installed at the lower end of the moving mold, and a coaxial through hole is provided inside the flared block;

[0010] A hollow tube is movably installed inside the through hole. A tapered, angle-adjustable folded tube is fixedly connected to the lower end of the hollow tube. The lower end of the folded tube is outwardly flared. The hollow tube and the folded tube are a double-layer structure, with a cavity formed between the two layers. A filter membrane permeable to lubricating fluid is installed on the outer side of the lower end of the folded tube.

[0011] Preferably, a laterally movable clamping block is installed below the moving mold via an electric telescopic device, and is fitted onto the outside of the support column at the upper end of the flared block.

[0012] Preferably, an electric telescopic rod is fixedly installed inside the hollow tube, and a push block is fixedly connected to its lower movable end for driving the folding tube to expand outward.

[0013] Preferably, an elastic curtain is fixedly installed at the lower end of the folding tube to close the lower opening of the hollow tube and drive the folding tube to retract.

[0014] Preferably, the upper outer side of the hollow tube is fitted with a cap, and a screw-in ring is provided in the plate extending downward from its outer ring, which is spirally connected to the annular groove at the upper end of the flared block.

[0015] Preferably, a bolt is inserted through the center of the cap, and its lower end is spirally connected to the upper end of the hollow tube.

[0016] Preferably, the upper end of the hollow tube has a filling port and a plug inside, located at the upper end of the cavity.

[0017] This utility model has the following beneficial effects:

[0018] This invention combines a hollow tube with a flaring block, which automatically applies lubricant from the folded tube to the inner wall of the tube during flaring operations through the contact between the filter membrane and the inner wall of the tube. This eliminates the hassle of manual application and has high application efficiency, making it suitable for the high-efficiency production needs of large-scale flaring operations.

[0019] This invention replaces the traditional pre-application method by performing lubricant application and flaring operations sequentially. The lubricant applied in this way can take effect immediately during the flaring operation, thus avoiding problems such as failure caused by the dwell time of pre-application.

[0020] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the three-dimensional appearance structure of the mold of this utility model;

[0023] Figure 2 This is a schematic diagram of the front view structure of the mold of this utility model;

[0024] Figure 3 This is a schematic diagram showing the exploded structure of the flared block and hollow tube of this utility model.

[0025] Figure 4 This is a schematic diagram of the combined flared block and hollow tube of this utility model and its partially enlarged structure;

[0026] Figure 5 This is a partially enlarged structural diagram of part A of this utility model;

[0027] The attached diagram lists the components represented by each number as follows:

[0028] In the picture:

[0029] 11. Mold frame; 12. Moving mold; 121. Clamping block; 13. Positioning clamp; 14. Flared block; 141. Support column; 1411. Annular groove; 142. Through hole; 15. Hollow tube; 151. Folded tube; 1511. Filter membrane; 1501. Cavity; 152. Elastic curtain; 153. Electric telescopic rod; 1531. Pushing block; 154. Cover; 1541. Screw ring; 1542. Bolt. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] In the description of this utility model, it should be understood that the terms "opening", "top and bottom", "thickness", "top", "middle", "length", "inner" and "around" indicate the orientation or positional relationship only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] Please see Figure 1-5 As shown, this utility model is a mold for forming an flared exhaust pipe for automobiles, including a mold frame 11, a moving mold 12 inside it, and a positioning clamp 13 at the bottom.

[0033] A flared block 14 is detachably installed at the lower end of the moving mold 12, and a coaxial through hole 142 is provided inside the flared block 14.

[0034] A hollow tube 15 is movably installed inside the through hole 142, which can be inserted from the bottom upwards. The lower end of the hollow tube 15 is fixedly connected to a cone-shaped folded tube 151 with an adjustable angle. When applying lubricant, it is in an expanded state and in a retracted state after application. The folded tube 151 is a cone-shaped structure with the upper end retracting inwards and the lower end expanding outwards. The hollow tube 15 and the folded tube 151 are a double-layer structure, with a cavity 1501 formed between the two layers. The inner layer is a hollow inner cavity. A filter membrane 1511 that can be permeated with lubricant is installed on the outer side of the lower end of the folded tube 151. When the filter membrane 1511 is against the inner wall of the tube, the lubricant in the cavity 1501 seeps outwards, and the application is formed as it moves downwards.

[0035] Furthermore, a laterally movable clamping block 121 is installed below the moving mold 12 via an electric telescopic device. The clamping blocks 121 are symmetrically distributed on the left and right and are fitted on the outside of the support column 141 at the upper end of the flared block 14, so that different flared blocks 14 can be replaced according to different pipe bodies.

[0036] Furthermore, an electric telescopic rod 153 is fixedly installed at the upper end of the inner cavity of the hollow tube 15, and a push block 1531 is fixedly connected to the lower movable end of the rod. The upper outer side of the push block 1531 is a conical surface that fits against the inner side of the inner layer of the folded tube 151. When the electric telescopic rod 153 drives the push block 1531 to retract, the conical surface pushes the folded tube 151 upward, thereby causing its lower part to expand outward and abut against the inner wall of the tube to be expanded.

[0037] Furthermore, an elastic curtain 152 is fixedly installed at the lower end of the folding tube 151 to close the lower opening of the hollow tube 15. After the coating operation, the electric telescopic rod 153 lowers the push block 1531, at which time the elastic curtain 152 pulls back the lower edge of the folding tube 151 to form a retraction.

[0038] Furthermore, a cap 154 ​​is fitted on the outer side of the upper end of the hollow tube 15, and a screw ring 1541 is provided in the plate body extending downward from its outer ring. The inner side of the screw ring 1541 has a threaded structure and is spirally connected to the threaded structure on the inner wall surface of the annular groove 1411 at the upper end of the flared block 14.

[0039] Furthermore, a bolt 1542 is inserted through the center of the cover 154, and its lower end is spirally connected to the upper end of the hollow tube 15. When it is screwed down, the top plate presses down on the cover 154, thereby connecting the cover 154 and the hollow tube 15 into one piece, so that it is fixedly installed inside the flared block 14.

[0040] Furthermore, the upper end of the hollow tube 15 is provided with a filling port and a plug is installed inside, located at the upper end of the cavity 1501.

[0041] It is understood that this utility model can automatically apply lubricant before the flaring operation, without the need for additional application procedures, and the flaring operation can be carried out directly after application without waiting or stopping, so that the lubricant can play its full role and ensure the stable progress of the flaring operation.

[0042] A specific application of the operation process in this embodiment is as follows: During the flaring operation, the downward pressure of the flaring block 14 will cause the folded tube 151 at the lower end of the hollow tube 15 to first enter the tube body. Then, the electric telescopic rod 153 will drive the push block 1531 to rise, thereby expanding the folded tube 151 outward so that the filter membrane 1511 adheres to the inner wall of the tube body. Then, as it continues to slide down, the lubricant inside the folded tube 151 can be applied to the inner wall of the tube body. Afterward, the push block 1531 will be lowered to retract the folded tube 151. After this process, the entry of the flaring block 14 can achieve the best effect of the lubricant, and at the same time, the additional application process is eliminated. Furthermore, when the lubricant is consumed and needs to be replenished, the bolt 1542 and the screw ring 1541 are rotated out one after the other. The plug at the upper end of the cavity 1501 can be directly pulled out for replenishment, or the hollow tube 15 can be directly pulled out for replenishment.

[0043] In the description of this specification, references to terms such as "an embodiment," "example," and "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A mold for forming an flared end of an automotive exhaust pipe, characterized in that: Includes the mold frame (11) and its internal moving mold (12) and the bottom positioning clamp (13); A flared block (14) is detachably installed at the lower end of the moving mold (12), and a coaxial through hole (142) is provided inside the flared block (14); A hollow tube (15) is movably installed inside the through hole (142). A tapered folded tube (151) with an adjustable angle is fixedly connected to the lower end of the hollow tube (15). The lower end of the folded tube (151) is outwardly flared. The hollow tube (15) and the folded tube (151) are double-layered structures, and a cavity (1501) is formed between the two layers. A filter membrane (1511) that can be permeated with lubricating fluid is installed on the outer side of the lower end of the folded tube (151).

2. The automotive exhaust pipe flaring forming mold according to claim 1, characterized in that: The moving mold (12) is equipped with a laterally movable clamping block (121) below it via an electric telescopic device, which is fitted onto the outside of the support column (141) at the upper end of the flared block (14).

3. The automotive exhaust pipe flaring forming mold according to claim 1, characterized in that: An electric telescopic rod (153) is fixedly installed in the inner cavity of the hollow tube (15), and a push block (1531) is fixedly connected to its lower movable end, which is used to drive the folding tube (151) to expand outward.

4. The automotive exhaust pipe flaring forming mold according to claim 3, characterized in that: An elastic curtain (152) is fixedly installed at the lower end of the folding tube (151) to close the lower opening of the hollow tube (15) and drive the folding tube (151) to retract.

5. The automotive exhaust pipe flaring forming mold according to claim 1, characterized in that: The upper outer side of the hollow tube (15) is fitted with a cap (154), and a screw ring (1541) is provided in the plate extending downward from its outer ring, which is spirally connected to the annular groove (1411) at the upper end of the flared block (14).

6. The automotive exhaust pipe flaring forming mold according to claim 5, characterized in that: A bolt (1542) is inserted through the center of the cover (154), and its lower end is spirally connected to the upper end of the hollow tube (15).

7. The automotive exhaust pipe flaring forming mold according to claim 1, characterized in that: The upper end of the hollow tube (15) is provided with a filling port and a plug is placed inside, located at the upper end of the cavity (1501).

Images