A flaring die for an automobile exhaust pipe
By designing a hydraulically driven vertical elbow clamp and an X-axis moving stage for flaring automotive exhaust pipes, the complexity and instability of traditional flaring methods have been solved, achieving efficient and precise flaring processing with strong adaptability and easy maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DALIAN WINSTAR AUTOPARTS CO LTD
- Filing Date
- 2025-08-14
- Publication Date
- 2026-07-14
AI Technical Summary
Traditional exhaust pipe flaring methods are complex to operate, inefficient, lack precision, have poor stability, are difficult to guarantee consistency and accuracy, and are difficult to maintain.
A mold for flaring an automotive exhaust pipe was designed. It uses a vertical elbow clamp driven by a hydraulic cylinder and a clamping groove for precise clamping. Combined with an X-axis moving table and auxiliary slide rails, it enables rapid and precise flaring of the exhaust pipe.
It improves the flexibility and precision of flaring operations, enhances flaring efficiency and stability, saves space, is easy to maintain and replace, adapts to different sizes of exhaust pipes, and expands the applicability of the mold.
Smart Images

Figure CN224487432U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of exhaust pipe technology, specifically to a flaring mold for automobile exhaust pipes. Background Technology
[0002] In the automotive manufacturing industry, the exhaust pipe is a crucial component, its quality directly impacting vehicle performance and emission standards. The exhaust pipe manufacturing process involves multiple steps, with the flaring process being a key one. The purpose of the flaring process is to expand the end of the exhaust pipe to facilitate connection with other components. Traditional flaring methods often employ manual or semi-automated mechanical devices, which suffer from problems such as complex operation, low efficiency, insufficient precision, and poor stability.
[0003] Manual flaring methods rely on the operator's skill, making it difficult to guarantee consistency and accuracy in each flaring attempt. Furthermore, they are labor-intensive and have low production efficiency. While semi-automated mechanical devices improve production efficiency to some extent, they still suffer from problems such as inaccurate positioning, complex operation, and difficult maintenance. Utility Model Content
[0004] The purpose of this utility model is to provide a mold for widening an automotive exhaust pipe to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a mold for flaring an automotive exhaust pipe, comprising a base plate, a first support platform and a second support platform on the base plate, the first support platform having a lower clamping groove; a vertical elbow clamp on the second support platform, a triangular seat on the base plate, a first hydraulic cylinder hinged to the triangular seat, the drive end of the first hydraulic cylinder being hinged to the lever of the vertical elbow clamp, causing the clamping head of the vertical elbow clamp to move longitudinally; a lower pressure plate at the lower end of the clamping head of the vertical elbow clamp, an upper clamping groove on the lower side of the lower pressure plate, the upper clamping groove corresponding to the lower clamping groove, and an exhaust pipe to be flared clamped between the upper clamping groove and the lower clamping groove; a bracket on the base plate, a second hydraulic cylinder on the bracket, and a flaring nozzle at the end of the drive shaft of the second hydraulic cylinder.
[0006] Preferably, the number of the second support platform is 2, and the corresponding number of the vertical elbow clamp, the triangular seat and the first hydraulic cylinder are all 2, and they are set one by one.
[0007] Preferably, an X-axis moving stage is provided between the bracket and the base plate, the bracket is located above the X-axis moving stage, and the X-axis moving stage is located on the base plate.
[0008] Preferably, the X-axis moving platform is provided with an auxiliary slide rail, and a support seat is slidably mounted on the auxiliary slide rail, with the drive shaft of the second hydraulic cylinder passing through the support seat.
[0009] Compared with the prior art, the beneficial effects of this utility model are:
[0010] 1. Improved operational flexibility and precision: By using a hydraulically driven vertical elbow clamp and clamping slot, the exhaust pipe can be quickly and accurately clamped and positioned.
[0011] 2. Improved flaring efficiency: By setting up an X-axis moving stage, precise movement of the flaring head can be achieved, thereby improving the efficiency of flaring operations.
[0012] 3. Enhanced stability: The design of the auxiliary slide rail and support seat makes the drive shaft of the second hydraulic cylinder more stable, reducing vibration during the flaring process and improving the flaring quality.
[0013] 4. Compact structure and space saving: Through reasonable layout design, the mold structure is compact, saving workshop space.
[0014] 5. Easy to maintain and replace: Due to the modular design of the mold, each component, such as the vertical elbow clamp and hydraulic cylinder, is easy to maintain and replace, which improves the service life and maintenance efficiency of the mold.
[0015] 6. Enhanced adaptability: Since the second support platform, vertical elbow clamp, triangular seat and the first hydraulic cylinder are two in number and are set in a one-to-one correspondence, the mold can more stably perform flaring operations on exhaust pipes of different sizes, increasing the applicability of the mold. Attached Figure Description
[0016] Figure 1 This is a front view schematic diagram of the present invention;
[0017] Figure 2 This is a side view of the cross-sectional structure of the present invention.
[0018] In the diagram: 1. Base plate; 2. First support platform; 3. Second support platform; 4. Clamping slot; 5. Vertical elbow clamp; 6. Triangular seat; 7. First hydraulic cylinder; 8. Lower pressure plate; 9. Upper clamping slot; 10. Bracket; 11. Second hydraulic cylinder; 12. Expanding mouth; 13. X-axis moving stage; 14. Auxiliary slide rail; 15. Support seat. Detailed Implementation
[0019] 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.
[0020] Please see Figure 1-2 This utility model provides a technical solution: a mold for flaring an automotive exhaust pipe, which mainly consists of a base plate 1, on which a first support platform 2 and a second support platform 3 are provided. The first support platform 2 is specially designed with a lower clamping groove 4 for fixing specific parts of the exhaust pipe.
[0021] On the second support platform 3, this mold is designed with a vertical elbow clamp 5 for precise positioning and clamping of the exhaust pipe. A triangular seat 6 is also provided on the base plate 1, and a first hydraulic cylinder 7 is hinged to the triangular seat 6. The drive end of the first hydraulic cylinder 7 is hinged to the lever of the vertical elbow clamp 5. Thus, when the hydraulic cylinder 7 operates, it can drive the clamping head of the vertical elbow clamp 5 to move longitudinally, thereby clamping or releasing the exhaust pipe.
[0022] To further ensure the stability and accuracy of the exhaust pipe, a lower pressure plate 8 is specially designed at the lower end of the clamping head of the vertical elbow clamp 5. An upper clamping groove 9 is provided on the lower side of the lower pressure plate 8, and the positions of the upper clamping groove 9 and the lower clamping groove 4 correspond. In this way, the exhaust pipe to be flared can be clamped between the upper clamping groove 9 and the lower clamping groove 4, ensuring that the position of the exhaust pipe remains fixed during the flaring process, thus improving the accuracy and efficiency of the flaring.
[0023] In addition, a bracket 10 is provided on the base plate 1, and a second hydraulic cylinder 11 is mounted on the bracket 10. The drive shaft end of the second hydraulic cylinder 11 is specially designed with a flaring nozzle 12 for flaring the exhaust pipe. Through the extension and retraction of the hydraulic cylinder 11, the flaring nozzle 12 can precisely flare the exhaust pipe, ensuring that the flaring size and shape of the exhaust pipe meet the design requirements.
[0024] Specifically, in this design, there are two second support platforms 3, and correspondingly, there are also two vertical elbow clamps 5, triangular seats 6, and first hydraulic cylinders 7. These components are designed in a one-to-one correspondence to ensure the coordination and functionality of the entire structure.
[0025] Specifically, an X-axis moving stage 13 is specially designed between the bracket 10 and the base plate 1. The bracket 10 is cleverly placed above the X-axis moving stage 13, while the X-axis moving stage 13 is stably set on the surface of the base plate 1.
[0026] To elaborate further, the X-axis moving stage 13 includes auxiliary slide rails 14 designed to support sliding motion. Support seats 15 are provided on these auxiliary slide rails 14 to support and carry related components. Specifically, the drive shaft of the second hydraulic cylinder 11 is designed to pass through and be fixed inside the support seat 15, thereby ensuring the stability and precise control of the drive shaft.
[0027] Working principle: When this utility model is in operation, the base plate 1 serves as the basic structure of the mold, supporting the other parts of the entire mold.
[0028] The first support platform 2 and the second support platform 3 are respectively set on the base plate 1 and are used to fix and support other parts of the mold.
[0029] The lower clamping groove 4 is located on the first support platform 2 and is used to position and fix the exhaust pipe to be processed.
[0030] The vertical elbow clamp 5 is mounted on the second support platform 3. The drive end of the first hydraulic cylinder 7 is hinged to the lever of the vertical elbow clamp 5, so as to realize the longitudinal movement of the clamping head of the vertical elbow clamp 5 in order to clamp or release the exhaust pipe.
[0031] The triangular seat 6 is fixed on the base plate 1 and hinged to the first hydraulic cylinder 7, so that the extension and retraction action of the hydraulic cylinder can be converted into the up and down movement of the vertical elbow clamp 5.
[0032] The lower pressure plate 8 is located at the lower end of the vertical elbow clamp 5, and its lower side is provided with an upper clamping groove 9, which corresponds to the lower clamping groove 4, for clamping the exhaust pipe.
[0033] The bracket 10 is fixed on the base plate 1 and is used to install the second hydraulic cylinder 11.
[0034] The second hydraulic cylinder 11 is mounted on the bracket 10, and its drive shaft end is provided with a flaring head 12 for flaring the exhaust pipe.
[0035] An X-axis moving stage 13 is provided between the bracket 10 and the base plate 1, so that the second hydraulic cylinder 11 can move along the X-axis direction to achieve precise control of the position of the exhaust pipe flare.
[0036] An auxiliary slide rail 14 is provided on the X-axis moving stage 13, and a support seat 15 slides on the slide rail. The drive shaft of the second hydraulic cylinder 11 passes through the support seat 15. The design of the auxiliary slide rail 14 and the support seat 15 ensures that the flaring head 12 is pushed more smoothly during the process, thereby improving the flaring efficiency.
[0037] With the above structure, the mold can achieve precise clamping and flaring of automobile exhaust pipes.
[0038] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0039] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.
[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A mold for flaring an automotive exhaust pipe, characterized in that: Includes a base plate (1), on which a first support platform (2) and a second support platform (3) are provided, and on which a lower clamping groove (4) is provided; The second support platform (3) is provided with a vertical elbow clamp (5), the base plate (1) is provided with a triangular seat (6), and a first hydraulic cylinder (7) is hinged on the triangular seat (6). The driving end of the first hydraulic cylinder (7) is hinged to the lever of the vertical elbow clamp (5), which drives the clamping head of the vertical elbow clamp (5) to move longitudinally. The lower end of the vertical elbow clamp (5) clamping head is provided with a lower pressure plate (8), and the lower side of the lower pressure plate (8) is provided with an upper clamping groove (9). The upper clamping groove (9) and the lower clamping groove (4) are positioned opposite each other. The exhaust pipe to be expanded is clamped between the upper clamping groove (9) and the lower clamping groove (4). The base plate (1) is provided with a bracket (10), and the bracket (10) is provided with a second hydraulic cylinder (11). The drive shaft end of the second hydraulic cylinder (11) is provided with a flared end (12).
2. The automobile exhaust pipe flaring mold according to claim 1, characterized in that: The number of the second support platform (3) is 2, and the corresponding number of the vertical elbow clamp (5), triangular seat (6) and first hydraulic cylinder (7) is 2, and they are set one by one.
3. The automobile exhaust pipe flaring mold according to claim 1, characterized in that: An X-axis moving stage (13) is provided between the bracket (10) and the base plate (1). The bracket (10) is located above the X-axis moving stage (13), and the X-axis moving stage (13) is located on the base plate (1).
4. The automobile exhaust pipe flaring mold according to claim 3, characterized in that: The X-axis moving stage (13) is provided with an auxiliary slide rail (14), and a support seat (15) is slidably provided on the auxiliary slide rail (14). The drive shaft of the second hydraulic cylinder (11) passes through the support seat (15).