Fixture for preventing thermal deformation of welded pipe orifice of half shell of exhaust manifold
By designing a clamp for welding half-shell of exhaust manifold, the coordination of limit blocks and pressure sensors is used to solve the problem of thermal deformation during welding, precise control and protection of the pipe ports are achieved, and the manufacturing accuracy and engine performance of the exhaust manifold are improved.
Patent Information
- Application Number
- CN202421027123.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-13
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-05-13
AI Technical Summary
During the half-shell welding of the exhaust manifold, the thermal stress generated by the welding causes thermal deformation of the pipe mouth, affecting the manifold accuracy and engine performance.
A fixture including a bracket, arc block, connecting block, fixture, fixture, limit block, pressure sensor and clamping drive assembly is designed. Through the cooperation of limit block and pressure sensor, precise control and protection of the pipe port is achieved.
It effectively reduces the impact of thermal deformation on the performance of exhaust manifolds, and through real-time monitoring of pressure sensors and automatic adjustment of clamping drive components, precise control and protection of pipe port size is achieved.
Smart Images
Figure CN222643616U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of exhaust manifold half-shell welding, in particular to a clamp for preventing exhaust manifold half-shell welding pipe openings from thermal deformation. Background Art
[0002] With the rapid development of the automobile industry, automobile exhaust manifolds are an important part of the engine, and their manufacturing quality is directly related to the performance and life of the car. In the manufacturing process of exhaust manifolds, half-shell welding is one of the key processes. However, due to the thermal stress generated during the welding process, the exhaust manifold often undergoes thermal deformation, which not only affects the accuracy of the manifold, but may also cause the engine performance to decline.
[0003] In the prior art, welding clamps are often used to fix the pipe mouths. However, in actual production, the fixing effect of the clamps alone is limited, and it is still difficult to completely control thermal deformation. Utility Model Content
[0004] The utility model aims to solve the defect that the exhaust manifold half shell welding pipe mouth is easy to be deformed in the prior art, and proposes a clamp to prevent the exhaust manifold half shell welding pipe mouth from thermal deformation.
[0005] In order to solve the problems existing in the prior art, the utility model adopts the following technical solutions:
[0006] A clamp for preventing thermal deformation of exhaust manifold half-shell welding pipe openings comprises a bracket, an arc block is fixedly provided on the upper end of the bracket, a connecting block is sleeved on the arc block, a fixing frame is fixedly provided at one end of the connecting block, two clamps are slidably provided in the fixing frame, limit blocks are fixedly provided at the ends of the two clamps, pressure sensors are fixedly provided in the two limit blocks, a clamping drive assembly is provided on the fixing frame, and a moving assembly is provided on the connecting block.
[0007] Preferably, an arc groove and a V-shaped groove are provided on the inner side of the limit block, and the arc groove and the V-shaped groove are connected.
[0008] Preferably, the clamping drive assembly includes a bidirectional screw rotatably mounted in a fixed frame, threads at both ends of the bidirectional screw are threadedly connected to one end of the clamp, a first motor is fixedly provided at the upper end of the fixed frame, and an output end of the first motor is fixedly connected to the end of the bidirectional screw.
[0009] Preferably, the moving component includes a second motor, a mounting ring is fixedly provided on the outer wall of the second motor, the lower end of the mounting ring is fixedly connected to the upper surface of the connecting block, a driving wheel is fixedly provided at the output end of the second motor, a plurality of gear columns are fixedly provided on one side of the arc block, and the driving wheel is meshed with the gear columns.
[0010] Preferably, baffles are fixedly provided at both ends of the arc block, and the area of the baffles is larger than the area of the cross section of the arc block.
[0011] Preferably, one end of the clamp is T-shaped, and the one end of the clamp is in contact with the inner wall of the fixing frame.
[0012] Preferably, a clamping block is clamped in a groove at one end of the limit block, and the detection end of the pressure sensor passes through the limit block.
[0013] Compared with the prior art, the beneficial effects of the utility model are:
[0014] 1. In the utility model, a high temperature resistant limit block is arranged at the end of the fixture, and a pressure sensor is arranged in the limit block. The limit block is closely attached to the exhaust manifold to reduce the occurrence of deformation. The pressure sensor is used to achieve precise control of the size of the pipe orifice, effectively reducing the influence of thermal deformation on the performance of the exhaust manifold;
[0015] 2. In the present invention, the clamping drive assembly is controlled by a pressure sensor to drive the limit block to clamp and contract, and the moving assembly is controlled to make the limit block move in a circle, thereby changing the clamping position of the limit block and improving the protection of the exhaust manifold. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:
[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0018] Figure 2 It is a side view structural schematic diagram of the utility model;
[0019] Figure 3 This is a schematic diagram of the structure of the mobile component of the utility model;
[0020] Figure 4 It is a schematic diagram of the structure of the clamping drive assembly of the utility model.
[0021] Serial numbers in the figure: 1. bracket; 11. arc block; 12. connecting block; 13. fixing frame; 14. clamp; 15. limit block; 16. pressure sensor; 17. clamping block; 2. arc groove; 21. V-shaped groove; 3. bidirectional screw; 31. first motor; 4. second motor; 41. mounting ring; 42. driving wheel; 43. gear column; 5. baffle. DETAILED DESCRIPTION
[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0023] Embodiment: This embodiment provides a fixture to prevent thermal deformation of exhaust manifold half shell welding nozzles, see Figure 1-4 Specifically, it includes a bracket 1, an arc block 11 is fixedly provided on the upper end of the bracket 1, a connecting block 12 is sleeved on the arc block 11, a fixed frame 13 is fixedly provided at one end of the connecting block 12, two clamps 14 are slidably provided in the fixed frame 13, and limit blocks 15 are fixedly provided at the ends of the two clamps 14. Pressure sensors 16 are fixed in the two limit blocks 15. One end of the clamp 14 is T-shaped, and one end of the clamp 14 is in contact with the inner wall of the fixed frame 13. A clamping block 17 is clamped in the groove at one end of the limit block 15. An arc groove 2 and a V-shaped groove 21 are opened on the inner side of the limit block 15, and the arc groove 2 and the V-shaped groove 21 are connected. The detection end of the pressure sensor 16 passes through the limit block 15, a clamping drive component is provided on the fixed frame 13, and a moving component is provided on the connecting block 12;
[0024] The limit block 15 is made of high temperature resistant material. The two clamps 14 are driven to move toward the middle of the fixed frame 13 through the clamping drive assembly. The clamp 14 drives the limit block 15 to fix the exhaust manifold. The arc groove 2 on the limit block 15 is in contact with the outer wall of the exhaust manifold, and the side wall of the V-shaped groove 21 will contact the outer wall of the exhaust manifold. Since the detection end of the pressure sensor 16 is located in the middle of the V-shaped groove 21 of the exhaust manifold, the detection end of the pressure sensor 16 will be in contact with the outer wall of the exhaust manifold. The detection end of the pressure sensor 16 is set to be spring-controlled. When the pipe mouth is displaced due to thermal deformation, the pressure sensor 16 can sense this change and transmit the signal to the control system. The control system controls the operation of the clamping drive assembly to allow the limit block 15 to shrink and adapt to the deformation of the exhaust manifold. The control system can also control the moving assembly to change the clamping position of the limit block 15, thereby effectively reducing the impact of thermal deformation on the performance of the exhaust manifold.
[0025] In the specific implementation process, Figure 2 and Figure 4 As shown, the clamping drive assembly includes a bidirectional screw 3 rotatably mounted in a fixed frame 13, both ends of the bidirectional screw 3 are threadedly connected to one end of the clamp 14, a first motor 31 is fixedly disposed on the upper end of the fixed frame 13, and an output end of the first motor 31 is fixedly connected to the end of the bidirectional screw 3;
[0026] The bidirectional screw 3 is driven to rotate by the first motor 31, and the bidirectional screw 3 drives the clamp 14 to move in the opposite direction synchronously, and the clamp 14 drives the limit block 15 to move synchronously to achieve clamping. The first motor 31 is connected to the control system.
[0027] In the specific implementation process, Figure 2 and Figure 3 As shown, the moving assembly includes a second motor 4, a mounting ring 41 is fixedly provided on the outer wall of the second motor 4, the lower end of the mounting ring 41 is fixedly connected to the upper surface of the connecting block 12, a driving wheel 42 is fixedly provided at the output end of the second motor 4, a plurality of tooth columns 43 are fixedly provided on one side of the arc block 11, the driving wheel 42 is meshed with the tooth columns 43, baffles 5 are fixedly provided at both ends of the arc block 11, and the area of the baffle 5 is larger than the area of the cross section of the arc block 11;
[0028] The driving wheel 42 is driven to rotate by the second motor 4, and the driving wheel 42 moves along the gear column 43. Since the second motor 4 is fixedly connected to the connecting block 12, the connecting block 12 is driven to move along the arc block 11. Before the connecting block 12 moves, the limit block 15 must leave the exhaust manifold to facilitate the connecting block 12 to drive the clamping drive assembly to move, change the position of the limit block 15, and then clamp, thereby effectively reducing the influence of thermal deformation on the performance of the exhaust manifold.
[0029] Specifically, the working principle and operation method of the utility model are as follows:
[0030] When the pipe mouth is displaced due to thermal deformation, the pressure sensor 16 can sense this change and transmit the signal to the control system. The control system issues a command to allow the first motor 31 to drive the bidirectional screw 3 to rotate, and the bidirectional screw 3 drives the clamp 14 to move in the opposite direction synchronously. The clamp 14 drives the limit block 15 to move synchronously, so that the limit block 15 can adapt to the deformation and fit closely to the outer wall of the exhaust manifold. The control system will also control the second motor 4 to drive the driving wheel 42 to rotate through the second motor 4, and the driving wheel 42 moves along the gear column 43. Since the second motor 4 is fixedly connected to the connecting block 12, it drives the connecting block 12 to move along the arc block 11. Before the connecting block 12 moves, the limit block 15 must leave the exhaust manifold to facilitate the connecting block 12 to drive the clamping drive assembly to move, change the position of the limit block 15, and then clamp, thereby effectively reducing the impact of thermal deformation on the performance of the exhaust manifold.
[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A fixture for preventing thermal deformation of exhaust manifold half-shell welding nozzles, comprising a bracket (1), characterized in that: An arc block (11) is fixedly provided at the upper end of the bracket (1), a connecting block (12) is sleeved on the arc block (11), a fixing frame (13) is fixedly provided at one end of the connecting block (12), two clamps (14) are slidably provided in the fixing frame (13), a limit block (15) is fixedly provided at the end of each of the two clamps (14), a pressure sensor (16) is fixedly provided in each of the two limit blocks (15), a clamping drive assembly is provided on the fixing frame (13), and a moving assembly is provided on the connecting block (12).
2. A fixture for preventing thermal deformation of exhaust manifold half-shell welding nozzles according to claim 1, characterized in that: An arc-shaped groove (2) and a V-shaped groove (21) are provided on the inner side of the limit block (15), and the arc-shaped groove (2) and the V-shaped groove (21) are connected.
3. A fixture for preventing thermal deformation of exhaust manifold half-shell welding nozzles according to claim 1, characterized in that: The clamping drive assembly comprises a bidirectional screw (3) rotatably mounted in a fixed frame (13), threads at both ends of the bidirectional screw (3) being threadedly connected to one end of a clamp (14), a first motor (31) being fixedly disposed at the upper end of the fixed frame (13), and an output end of the first motor (31) being fixedly connected to an end of the bidirectional screw (3).
4. A fixture for preventing thermal deformation of exhaust manifold half-shell welding nozzles according to claim 1, characterized in that: The moving assembly comprises a second motor (4), a mounting ring (41) is fixedly provided on the outer wall of the second motor (4), the lower end of the mounting ring (41) is fixedly connected to the upper surface of the connecting block (12), a driving wheel (42) is fixedly provided on the output end of the second motor (4), a plurality of tooth columns (43) are fixedly provided on one side of the arc block (11), and the driving wheel (42) is meshed with the tooth columns (43).
5. A fixture for preventing thermal deformation of exhaust manifold half-shell welding nozzles according to claim 1, characterized in that: Baffles (5) are fixedly provided at both ends of the arc-shaped block (11), and the area of the baffles (5) is larger than the area of the cross section of the arc-shaped block (11).
6. A fixture for preventing thermal deformation of exhaust manifold half-shell welding nozzles according to claim 1, characterized in that: One end of the clamp (14) is T-shaped, and one end of the clamp (14) is in contact with the inner wall of the fixing frame (13).
7. A fixture for preventing thermal deformation of exhaust manifold half-shell welding nozzles according to claim 1, characterized in that: A clamping block (17) is clamped in a groove at one end of the limit block (15), and a detection end of the pressure sensor (16) passes through the limit block (15).