Fixture for drilling flange surface of automobile exhaust pipe
By designing a multi-directional positioning fixture, the problem of positioning the complex shape of the exhaust pipe body was solved, achieving high-precision and efficient clamping effect, and ensuring the stable installation and processing quality of the exhaust pipe.
Patent Information
- Application Number
- CN202423310813.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Existing fixtures are insufficient for effectively positioning and securing complex-shaped exhaust pipe bodies, resulting in inadequate machining accuracy and affecting installation.
A fixture for drilling automotive exhaust pipe flanges has been designed, comprising a worktable, mounting base, clamping device, U-shaped fixing frame, and floating plate. It achieves stable clamping through multi-directional positioning and the elasticity of the floating plate, and ensures accurate installation by combining positioning blocks and inspection holes.
This improved machining accuracy and clamping efficiency, ensuring the stability and accuracy of the exhaust pipe body, preventing loosening, and enhancing machining quality.
Smart Images
Figure CN223834023U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of clamping equipment technology, and in particular to a clamp for drilling holes in the flange face of an automobile exhaust pipe. Background Technology
[0002] A fixture is a process device used during machining to quickly secure the workpiece and keep the machine tool, cutting tool, and workpiece in the correct relative position.
[0003] One type of exhaust pipe is called the exhaust manifold, a crucial component of a car engine's exhaust system. In current technology, the exhaust manifold's function is to collect exhaust gases from each cylinder of the engine and safely release them into the atmosphere. The exhaust manifold's inlet corresponds to the intake port of the car engine cylinder, and its end face is connected to the engine block via an intake flange and connecting bolts. The exhaust main pipe's inlet is the exhaust port, and its end face is connected to the turbocharger via an exhaust flange and connecting bolts. The turbocharger is externally connected to the exhaust main pipe. The primary functional requirement of this exhaust system is to release exhaust gases from the cylinders into the atmosphere through the exhaust manifold, exhaust main pipe, catalytic converter, and muffler with minimal exhaust resistance and noise. Therefore, the exhaust passages inside the exhaust manifold and the mounting portions at both ends require high geometric precision.
[0004] There is a kind of Figure 9 and Figure 10 The exhaust manifold shown includes an exhaust pipe body 100, a circular port 101 at the lower end of the exhaust pipe body 100, and an oblique port 102 at the upper end of the exhaust pipe body 100. The opening of the circular port 101 is provided with a stepped portion 1011. The end face of the opening of the oblique port 102 is set at an angle α with the end face of the opening of the circular port 101. A protruding post 103 is provided on the side of the oblique port 102. The exhaust pipe body 100 is also provided with a tubular portion 104 protruding from the exhaust pipe body 100. During the processing of the exhaust manifold, the end face and inner wall of the inclined port 102 and the end face of the protrusion 103 need to be milled. At the same time, the inclined port 102 and the protrusion 103 also need to be drilled. Due to the complex shape of the exhaust pipe body 100, traditional fixtures have difficulty in positioning and fixing such a complex exhaust pipe body 100, resulting in insufficient milling and drilling accuracy, which affects the installation of the exhaust pipe body 100.
[0005] Therefore, it is necessary to improve the existing technology. Utility Model Content
[0006] The purpose of this utility model is to solve the problem that in the prior art, due to the complex shape of the exhaust pipe body, traditional fixtures are difficult to position and fix such complex-shaped exhaust pipe bodies, resulting in insufficient milling and drilling accuracy, which affects the installation of the exhaust pipe body. Therefore, a fixture for drilling the flange surface of automotive exhaust pipes is proposed.
[0007] To achieve the above objectives, the present invention adopts the following technical solution:
[0008] A jig for drilling the flange face of an automotive exhaust pipe includes a worktable with multiple stations for installing the exhaust pipe body. Each station includes a mounting base, a clamping device movably connected to the mounting base, and a U-shaped fixing frame disposed beside the mounting base. A floating plate corresponding to the circular port of the exhaust pipe body is movably disposed on the mounting base. The U-shaped fixing frame is used to position the tubular portion. The upper surface of the worktable is horizontal, and the upper surface of the mounting base is at an angle α to the upper surface of the worktable, so that the end face of the oblique port of the installed exhaust pipe body is parallel to the upper surface of the worktable.
[0009] Furthermore, an elastic element is provided between the floating disk and the mounting base so that the floating disk always has an upward tendency to move relative to the mounting base.
[0010] Furthermore, the elastic element is a butterfly spring.
[0011] Furthermore, the workstation is also provided with positioning blocks, which are evenly distributed around the circumference of the floating disk. The outer side wall of the positioning block abuts against the inner side wall of the circular port of the exhaust pipe body, and the upper surface of the positioning block abuts against the stepped portion of the circular port.
[0012] Furthermore, the outer wall of the positioning block is provided with an arc-shaped surface that matches the inner wall of the circular port of the exhaust pipe body.
[0013] Furthermore, the upper surface of the positioning block is provided with inspection air holes, which correspond to and cooperate with the step portion.
[0014] Furthermore, the clamping device includes a clamping block and a power source that provides clamping power to the clamping block.
[0015] Furthermore, the power source is a hydraulic cylinder.
[0016] Furthermore, the workbench and the mounting base cooperate to form an oil supply pipeline that communicates with the hydraulic cylinder.
[0017] Furthermore, the workbench and the mounting base cooperate to form an air supply pipeline that communicates with the inspection air hole.
[0018] The beneficial effects of this utility model after adopting the above structure are as follows:
[0019] (1) The present invention provides a fixture for drilling the flange face of an automotive exhaust pipe, comprising a worktable with multiple stations for installing the exhaust pipe body. Each station includes a mounting base, a clamping device movably connected to the mounting base, and a U-shaped fixing frame disposed beside the mounting base. A floating plate corresponding to the circular port of the exhaust pipe body is movably disposed on the mounting base. The U-shaped fixing frame is used to position the tubular portion. The upper surface of the worktable is horizontal, and the upper surface of the mounting base is at an angle α to the upper surface of the worktable, so that the end face of the oblique port of the installed exhaust pipe body is parallel to the upper surface of the worktable. The present invention uses the mounting base, clamping device, U-shaped fixing frame, and floating plate to position the exhaust pipe body in multiple directions, resulting in a firm clamping and high stability. The exhaust pipe body is not easily loosened during processing, thereby improving processing accuracy. The fixture has multiple stations, allowing multiple exhaust pipe bodies to be clamped simultaneously, thus improving clamping efficiency.
[0020] (2) The fixture for drilling the flange face of an automobile exhaust pipe according to this utility model has the upper surface of the mounting base and the upper surface of the worktable at an angle α, and the end face of the inclined port of the exhaust pipe body and the end face of the circular port at an angle α. During installation, the circular port of the exhaust pipe body corresponds to the floating plate on the mounting base, so that the end face of the inclined port of the exhaust pipe body after installation is parallel to the upper surface of the worktable, so as to facilitate milling the end face of the inclined port.
[0021] (3) The fixture for drilling the flange surface of an automobile exhaust pipe according to this utility model has an inspection air hole on the upper surface of the positioning block, which corresponds to and cooperates with the stepped part. By setting the inspection air hole, it is possible to check whether the stepped part of the circular port of the exhaust pipe body is tightly abutted against the upper surface of the positioning block. When the stepped part of the circular port of the exhaust pipe body is not tightly abutted against the upper surface of the positioning block, that is, when the installation and positioning of the exhaust pipe body is unreliable, the machining program cannot be started, thus ensuring the accuracy and reliability of the installation and positioning of the exhaust pipe body, and thus ensuring the machining accuracy. Attached Figure Description
[0022] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0023] Figure 1This is a schematic diagram of the overall structure of this utility model;
[0024] Figure 2 This is a cross-sectional view of the overall structure of this utility model;
[0025] Figure 3 This is a schematic diagram showing the connection between the mounting base, clamping device, floating plate, U-shaped fixing frame and exhaust pipe body of this utility model.
[0026] Figure 4 This is a schematic diagram showing the connection between the mounting base, clamping device, floating plate, and U-shaped fixing frame of this utility model.
[0027] Figure 5 This is the utility model Figure 4 Enlarged schematic diagram of the structure at point A;
[0028] Figure 6 This is a cross-sectional view of the workbench of this utility model;
[0029] Figure 7 This is a cross-sectional view of the mounting base of this utility model. Figure 1 ;
[0030] Figure 8 This is a cross-sectional view of the mounting base of this utility model. Figure 2 ;
[0031] Figure 9 This is a three-dimensional schematic diagram of the exhaust pipe body of this utility model. Figure 1 ;
[0032] Figure 10 This is a three-dimensional schematic diagram of the exhaust pipe body of this utility model. Figure 2 .
[0033] Figures 1 to 10 The winning number is:
[0034] 1. Workbench; 2. Mounting base; 3. Clamping device; 31. Clamping block; 32. Hydraulic cylinder; 4. U-shaped fixing frame; 5. Floating plate; 6. Butterfly spring; 7. Positioning block; 71. Arc-shaped surface; 72. Inspection air hole; 8. Oil pipeline; 9. Air pipeline; 100. Exhaust pipe body; 101. Circular port; 1011. Stepped part; 102. Angled port; 103. Protruding column; 104. Tubular part. Detailed Implementation
[0035] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0036] In the description of this utility model, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, the term "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0039] In this utility model, unless otherwise explicitly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact, or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0040] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this invention are for illustrative purposes only and do not represent the only possible implementation.
[0041] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.
[0042] like Figures 1 to 10 As shown, a jig for drilling the flange face of an automotive exhaust pipe includes a workbench 1. The workbench 1 has multiple stations for installing the exhaust pipe body 100. Each station includes a mounting base 2, a clamping device 3 movably connected to the mounting base 2, and a U-shaped fixing frame 4 disposed beside the mounting base 2. A floating disk 5 corresponding to the circular port 101 of the exhaust pipe body 100 is movably disposed on the mounting base 2. The U-shaped fixing frame 4 is used to position the tubular part 104. The upper surface of the workbench 1 is horizontal, and the upper surface of the mounting base 2 is at an angle α to the upper surface of the workbench 1, so that the end face of the inclined port 102 of the exhaust pipe body 100 after installation is parallel to the upper surface of the workbench 1.
[0043] Based on the above embodiments, the present invention aims to provide a fixture for drilling the flange surface of an automotive exhaust pipe, including a workbench 1. The workbench 1 is provided with multiple workstations for installing the exhaust pipe body 100. Each workstation includes a mounting base 2, a clamping device 3 movably connected to the mounting base 2, and a U-shaped fixing frame 4 disposed beside the mounting base 2. A floating disk 5 corresponding to and cooperating with the circular port 101 of the exhaust pipe body 100 is movably disposed on the mounting base 2. The U-shaped fixing frame 4 is used to position the tubular part 104. The upper surface of the workbench 1 is horizontally arranged, and the upper surface of the mounting base 2 is set at an angle α with the upper surface of the workbench 1, so that the end face of the inclined port 102 of the exhaust pipe body 100 after installation is parallel to the upper surface of the workbench 1. This utility model uses a mounting base 2, a clamping device 3, a U-shaped fixing frame 4, and a floating plate 5 to position and fix the exhaust pipe body 100 in multiple directions, resulting in a firm clamping and high stability. The exhaust pipe body 100 is less likely to loosen during processing, thus improving processing accuracy. The fixture has multiple workstations, allowing for the simultaneous clamping of multiple exhaust pipe bodies 100, improving clamping efficiency.
[0044] In this embodiment, as Figure 2 As shown, the upper surface of the mounting base 2 is set at an angle α to the upper surface of the worktable 1, and the end face of the oblique port 102 of the exhaust pipe body 100 is set at an angle α to the end face of the circular port 101. During installation, the circular port 101 of the exhaust pipe body 100 corresponds to the floating disk 5 on the mounting base 2, so that the end face of the oblique port 102 of the exhaust pipe body 100 after installation is parallel to the upper surface of the worktable 1. This facilitates milling the end face of the oblique port 102. In this embodiment, the upper surface of the floating disk 5 is parallel to the upper surface of the mounting base 2, and during installation, the end face of the circular port 101 of the exhaust pipe body 100 is parallel to both the upper surface of the floating disk 5 and the upper surface of the mounting base 2.
[0045] In this embodiment, as Figure 3 As shown, the U-shaped fixing frame 4 is used to position the tubular part 104 to prevent the tubular part 104 from shaking during processing and to ensure processing accuracy.
[0046] As another preferred embodiment of this utility model, an elastic element is provided between the floating disk 5 and the mounting base 2, so that the floating disk 5 always has an upward tendency to move relative to the mounting base 2. The elastic element is a disc spring 6. In this embodiment, as... Figure 2As shown, during installation, the clamping device 3 applies a downward clamping force to the exhaust pipe body 100, and the floating disk 5 applies an upward force to the exhaust pipe body 100 under the elastic force of the butterfly spring 6. In this way, the exhaust pipe body 100 is positioned and fixed upward and downward. At the same time, the exhaust pipe body 100 is circumferentially positioned and fixed by the positioning block 7 set on the circumference of the mounting base 2.
[0047] As another preferred embodiment of this utility model, the workstation is further provided with positioning blocks 7, which are evenly distributed along the circumference of the floating disk 5. The outer wall of the positioning block 7 abuts against the inner wall of the circular port 101 of the exhaust pipe body 100, and the upper surface of the positioning block 7 abuts against the stepped portion 1011 of the circular port 101. The outer wall of the positioning block 7 is provided with an arc-shaped surface 71 that matches the inner wall of the circular port 101 of the exhaust pipe body 100. In this embodiment, as... Figure 3 and Figure 4 As shown, the positioning block 7 circumferentially limits the circular port 101 from its inner wall, thereby preventing horizontal slippage of the exhaust pipe body 100 during processing. In this embodiment, as... Figure 4 As shown, the design of the arc-shaped surface 71 makes the positioning block 7 fit more closely to the inner wall of the circular port 101, making the circumferential positioning of the exhaust pipe body 100 more reliable.
[0048] As another preferred embodiment of this utility model, the upper surface of the positioning block 7 is provided with an inspection air hole 72, which corresponds to and cooperates with the stepped portion 1011. The workbench 1 and the mounting base 2 cooperate to form an air supply pipe 9 communicating with the inspection air hole 72. In this embodiment, as... Figure 5 As shown, by checking the setting of the inspection vent 72, it is possible to check whether the stepped portion 1011 of the circular port 101 of the exhaust pipe body 100 is tightly abutted against the upper surface of the positioning block 7. When the stepped portion 1011 of the circular port 101 of the exhaust pipe body 100 is not tightly abutted against the upper surface of the positioning block 7, that is, when the installation and positioning of the exhaust pipe body 100 is unreliable, the machining program cannot be started, thus ensuring the accuracy and reliability of the installation and positioning of the exhaust pipe body 100, and thereby ensuring the machining accuracy. In this embodiment, as... Figure 6 and Figure 7 As shown, the gas supply pipeline 9 is configured such that the inspection air holes 72 on all the positioning blocks 7 are connected to the gas source, which can realize the synchronous detection of the installation status of the exhaust pipe body 100 at each workstation and improve the detection efficiency.
[0049] In another preferred embodiment of this utility model, the clamping device 3 includes a clamping block 31 and a power source that provides clamping power to the clamping block 31. The power source is a hydraulic cylinder 32. The worktable 1 and the mounting base 2 cooperate to form an oil supply line 8 communicating with the hydraulic cylinder 32. In this embodiment, as... Figure 2 As shown, during installation, the exhaust pipe body 100 is fitted onto the floating disk 5. The positioning block 7 limits the inner circumference of the circular port 101 of the exhaust pipe body 100, and the clamping block 31 clamps the exhaust pipe body 100, achieving multi-point positioning and stable clamping of the exhaust pipe body 100. This prevents the exhaust pipe body 100 from loosening during processing, thereby improving processing accuracy. In this embodiment, as... Figure 6 and Figure 8 As shown, the hydraulic cylinders 32 of multiple stations on the workbench 1 are synchronously controlled by the oil pipeline 8, thereby improving the efficiency of clamping operations.
[0050] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this utility model.
Claims
1. A fixture for drilling holes in the flange face of an automotive exhaust pipe, comprising a worktable (1), characterized in that: The workbench (1) is provided with multiple workstations for installing the exhaust pipe body (100). Each workstation includes a mounting base (2), a clamping device (3) movably connected to the mounting base (2), and a U-shaped fixing frame (4) set on the side of the mounting base (2). A floating disk (5) corresponding to the circular port (101) of the exhaust pipe body (100) is movably set on the mounting base (2). The U-shaped fixing frame (4) is used to position the tubular part (104). The upper surface of the workbench (1) is horizontal. The upper surface of the mounting base (2) is set at an angle α with the upper surface of the workbench (1) so that the end face of the oblique port (102) of the installed exhaust pipe body (100) is parallel to the upper surface of the workbench (1).
2. The fixture for drilling holes in the flange face of an automotive exhaust pipe according to claim 1, characterized in that: An elastic element is provided between the floating disk (5) and the mounting base (2) so that the floating disk (5) always has an upward movement tendency relative to the mounting base (2).
3. The fixture for drilling holes in the flange face of an automotive exhaust pipe according to claim 2, characterized in that: The elastic element is a butterfly spring (6).
4. The fixture for drilling holes in the flange face of an automotive exhaust pipe according to claim 1, characterized in that: The workstation is also provided with a positioning block (7), which is evenly distributed around the circumference of the floating disk (5). The outer side wall of the positioning block (7) abuts against the inner side wall of the circular port (101) of the exhaust pipe body (100), and the upper surface of the positioning block (7) abuts against the stepped part (1011) of the circular port (101).
5. A fixture for drilling holes in the flange face of an automotive exhaust pipe according to claim 4, characterized in that: The outer wall of the positioning block (7) is provided with an arc-shaped surface (71) that is adapted to the inner wall of the circular port (101) of the exhaust pipe body (100).
6. A fixture for drilling holes in the flange face of an automotive exhaust pipe according to claim 4, characterized in that: The upper surface of the positioning block (7) is provided with an inspection air hole (72), which corresponds to and cooperates with the step portion (1011).
7. A fixture for drilling holes in the flange face of an automotive exhaust pipe according to claim 1, characterized in that: The clamping device (3) includes a clamping block (31) and a power source that provides clamping power to the clamping block (31).
8. A fixture for drilling holes in the flange face of an automotive exhaust pipe according to claim 7, characterized in that: The power source is a hydraulic cylinder (32).
9. A fixture for drilling holes in the flange face of an automotive exhaust pipe according to claim 8, characterized in that: The workbench (1) and the mounting base (2) cooperate to form an oil supply pipeline (8) that is connected to the hydraulic cylinder (32).
10. A fixture for drilling holes in the flange face of an automotive exhaust pipe according to claim 6, characterized in that: The workbench (1) and the mounting base (2) cooperate to form an air supply pipeline (9) that communicates with the inspection air hole (72).