High-precision machining fixture device for conical surface sealing parts

Abstract

The utility model discloses a high accuracy machining clamp device of conical surface sealing part, including base, two drive parts, two movable clamping blocks and a fixed clamping block, two drive parts are one hundred and twenty degree angle and are installed to the base, two movable clamping blocks are respectively installed to two drive parts, fixed clamping block movable installation is to the base, two movable clamping blocks with fixed clamping block originally surround the base and are equidistant annular distribution, this utility model switches the arc -shaped clamping groove on it and the workpiece matching through adjusting two movable clamping blocks to the workpiece, then rotates two drive parts and respectively drives two movable clamping blocks to cooperate fixed clamping block and clamps the positioning of workpiece outside, realizes clamping positioning, realizes the flexible matching of workpiece size with the arc -shaped clamping groove of different sizes on movable clamping block and fixed clamping block, and the device has the advantages that the workpiece of matching different sizes is more flexible, the frequency of replacing the clamp is reduced, and the processing efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of processing technology for conical sealing parts, and more specifically, to a high-precision processing fixture device for conical sealing parts. Background Technology

[0002] Conical surface seals are critical sealing structures in automobiles. Their design and manufacturing directly affect the performance of core components such as the braking system and engine. For example, brake line seals use a conical flared mouth that contacts a boss for sealing. The flared mouth undergoes elastic-plastic deformation to fill the gap through the preload of the nut. It can withstand high pressure without gaskets and achieves line sealing through sharp corner compression. The risk of leakage is reduced by 60% compared to traditional surface seals. The valve and valve seat use a 45° conical surface fit. The intake valve is made of medium carbon alloy steel, while the exhaust valve requires heat-resistant alloy steel and may be equipped with a hollow sodium cooling structure. The contact surfaces need to be regularly ground and maintained, and the cone angle error needs to be controlled within ±0.1° to ensure airtightness.

[0003] The processing technology requires precision control of the conical surface roundness error ≤0.01mm, surface roughness Ra≤0.4μm, and a 0.05-0.1mm flat head to prevent deformation at the cone tip. 90° conical surface sealing is recommended to be processed using CNC machine tools. During assembly, the tightening force must be strictly controlled within three-quarters of a rotation. 304 stainless steel is used for normal working conditions, 316L for acidic media, and Inconel 718 alloy is recommended for high temperature and high pressure environments. Hard alloy coating (such as tungsten carbide) can increase the service life by 3 times.

[0004] Currently, since these types of seals are generally small cylindrical workpieces, their end faces or ports are machined into conical surfaces. Due to the small size of the workpieces, the clamping area is small, and the size requirements of the formed workpieces are very diverse. Existing equipment requires frequent changes of fixtures to meet different size requirements, resulting in low processing efficiency and cumbersome operation. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a high-precision machining fixture device for conical sealing parts, so as to solve the problems in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution;

[0007] A high-precision machining fixture for conical sealing parts includes a base, two driving components, two movable clamping blocks, and one fixed clamping block. The two driving components are mounted on the base at a 120-degree angle. The two movable clamping blocks are movably mounted on the two driving components, and the fixed clamping block is movably mounted on the base. The two movable clamping blocks and the fixed clamping block are originally distributed in a ring at equal distances around the base. Each of the three corners of the movable and fixed clamping blocks has an arc-shaped groove of different size. The rotation angle of the movable and fixed clamping blocks is adjusted so that the three arc-shaped grooves of the same size face the center of the base. The two driving components drive the two movable clamping blocks to move towards the center to cooperate with the fixed clamping block to clamp the sealing part.

[0008] As a further description of the above technical solution: the driving component includes an adjusting screw and a sliding block. One end of the adjusting screw passes through and is rotatably connected to the interior of the base and is threadedly connected to the interior of the sliding block. The outer side of the sliding block is slidably connected to the base. The movable locking block is movably mounted on the sliding block.

[0009] As a further description of the above technical solution: a column and a first positioning rod are fixedly installed on the sliding block, the bottom of the movable block is sleeved on the column, the column supports the rotation and vertical sliding of the movable block, and the movable block is provided with three positioning through slots that cooperate with the first positioning rod.

[0010] As a further description of the above technical solution: a circular groove for supporting the vertical sliding and rotation of the fixed block is provided on the base, a second positioning rod is fixedly connected to the base, and three positioning through holes are provided on the supporting fixed block at equal distances, and the second positioning rod is inserted into the positioning through holes.

[0011] As a further description of the above technical solution: a concentric groove is provided at the center of the base, and a platform slides vertically inside the concentric groove. A vertical screw is threadedly connected to the center of the platform, and the bottom end of the vertical screw passes through to the bottom of the platform and is rotatably connected to the bottom of the concentric groove.

[0012] As a further description of the above technical solution: two guide posts are fixedly connected inside the concentric groove, and the top ends of the two guide posts penetrate through and slide into the interior of the stage.

[0013] Compared with existing technologies, the advantages of this utility model are:

[0014] This solution uses fixed and movable clamping blocks to facilitate the adjustment of arc-shaped clamping slots of different sizes to match workpieces of different sizes. At the same time, the vertical screw is used to adjust the height of the stage to match workpieces of different heights. Thus, the device has the advantages of being more flexible in matching workpieces of different sizes, reducing the frequency of fixture changes, and improving processing efficiency. Attached Figure Description

[0015] Figure 1 This is a top view of the structure of this utility model;

[0016] Figure 2 This is a top view cross-sectional structural diagram of the present invention;

[0017] Figure 3 This is a partial three-dimensional cross-sectional structural diagram of the present invention;

[0018] Figure 4 This is a frontal cross-sectional view of the present invention.

[0019] Explanation of the labels in the diagram:

[0020] 1. Base; 2. Drive component; 21. Adjusting screw; 22. Sliding block; 221. Column; 222. First positioning rod; 3. Movable locking block; 31. Positioning through groove; 4. Fixed locking block; 41. Positioning through hole; 5. Arc-shaped locking groove; 6. Circular groove; 7. Second positioning rod; 8. Concentric groove; 81. Guide post; 9. Platform; 10. Vertical screw. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model;

[0022] Please see Figure 1-4 In this utility model, a high-precision machining fixture for conical sealing parts includes a base 1, two driving components 2, two movable clamping blocks 3, and one fixed clamping block 4. The two driving components 2 are mounted on the base 1 at a 120-degree angle. The two movable clamping blocks 3 are respectively movably mounted on the two driving components 2. The fixed clamping block 4 is movably mounted on the base 1. The two movable clamping blocks 3 and the fixed clamping block 4 are originally distributed in a ring at equal distances around the base 1. The three corners of the movable clamping blocks 3 and the fixed clamping block 4 are respectively provided with arc-shaped grooves 5 of different sizes. The rotation angle of the movable clamping blocks 3 and the fixed clamping block 4 is adjusted so that the three arc-shaped grooves 5 of the same size face the center of the base 1. The two driving components 2 drive the two movable clamping blocks 3 to move towards the center to cooperate with the fixed clamping block 4 to clamp the sealing parts.

[0023] In this invention, the workpiece blank is placed vertically at the center of the base 1 with the workpiece blank facing upwards. Based on the workpiece's outer diameter, the fixed clamping block 4 is pulled upwards and then rotated to switch the arc-shaped clamping groove 5 that matches the workpiece to fit against the outer side of the workpiece, serving as a positioning support. Then, the two movable clamping blocks 3 are adjusted to switch the arc-shaped clamping groove 5 on them to face the workpiece. Finally, the two driving components 2 are rotated to drive the two movable clamping blocks 3 to cooperate with the fixed clamping block 4 to clamp and position the outer side of the workpiece, achieving clamping and positioning. The different sizes of the arc-shaped clamping grooves 5 on the movable and fixed clamping blocks 3 and 4 allow for flexible matching of workpiece dimensions, eliminating the need for frequent fixture changes. This results in a device that is more flexible in matching workpieces of different sizes, reduces the frequency of fixture changes, and improves processing efficiency. It solves the problems of existing technology where, due to the small size of the workpiece and limited clamping area, and the wide variety of size requirements for the formed workpieces, existing equipment requires frequent fixture changes to meet different size requirements, resulting in low processing efficiency and cumbersome operation.

[0024] Please see Figure 2 The driving component 2 includes an adjusting screw 21 and a sliding block 22. One end of the adjusting screw 21 passes through and is rotatably connected to the interior of the base 1 and is threadedly connected to the interior of the sliding block 22. The outer side of the sliding block 22 is slidably connected to the base 1. The movable locking block 3 is movably installed on the sliding block 22.

[0025] In this invention, by rotating the adjusting screw 21, the sliding block 22 is driven to slide linearly along the base 1, thereby driving the movable locking block 3 to achieve linear displacement toward the center, so that the two movable locking blocks 3 cooperate with the fixed locking block 4 to achieve triangular clamping and positioning of the workpiece.

[0026] Please see Figure 1 and Figure 2 The sliding block 22 is fixedly installed with a column 221 and a first positioning rod 222. The bottom of the movable block 3 is sleeved on the column 221. The column 221 supports the rotation and vertical sliding of the movable block 3. The movable block 3 is provided with three positioning through slots 31 that cooperate with the first positioning rod 222.

[0027] In this utility model, the column 221 is used to support the movable locking block 3, so that the movable locking block 3 can slide and rotate vertically. The positioning through groove 31 of the movable locking block 3 works with the first positioning rod 222 to position it, so that it can easily adjust the arc-shaped locking groove 5 of different sizes and simultaneously position it to make the clamping stable.

[0028] Please see Figure 1 and Figure 2The base 1 has a circular groove 6 for supporting the vertical sliding and rotation of the fixed block 4. The base 1 is fixedly connected with a second positioning rod 7. The fixed block 4 has three positioning through holes 41 arranged at equal distances. The second positioning rod 7 is inserted into the positioning through holes 41.

[0029] In this invention, the fixed block 4 can slide and rotate vertically on the base 1 through the circular groove 6, and the positioning is achieved by adjusting the different arc-shaped slots 5 using the positioning through hole 41 in conjunction with the second positioning rod 7. The adjustment is convenient and the clamping is stable.

[0030] Please see Figure 3 and Figure 4 The base 1 has a concentric groove 8 at its center. A platform 9 slides vertically inside the concentric groove 8. A vertical screw 10 is threadedly connected to the center of the platform 9. The bottom end of the vertical screw 10 passes through to the bottom of the platform 9 and is rotatably connected to the bottom of the concentric groove 8.

[0031] In this invention, the vertical screw 10 is rotated to drive the platform 9 to adjust its height vertically along the concentric groove 8. The platform 9 is used to place the workpiece, which facilitates the adjustment of the support height for small and short workpieces and makes it easier to match the movable clamping block 3 and the fixed clamping block 4 for clamping and positioning.

[0032] Please see Figure 3 and Figure 4 Among them, two guide posts 81 are fixedly connected inside the concentric groove 8, and the tops of the two guide posts 81 penetrate through and slide into the interior of the stage 9.

[0033] In this invention, the guide post 81 guides and stabilizes the platform 9, making its vertical adjustment more stable.

[0034] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A high-precision machining fixture for conical sealing parts, characterized in that: The device includes a base (1), two drive components (2), two movable locking blocks (3), and a fixed locking block (4). The two drive components (2) are mounted on the base (1) at a 120-degree angle. The two movable locking blocks (3) are respectively movably mounted on the two drive components (2). The fixed locking block (4) is movably mounted on the base (1). The two movable locking blocks (3) and the fixed locking block (4) are originally distributed in a ring at equal distances around the base (1). The three corners of the movable locking blocks (3) and the fixed locking block (4) are respectively provided with arc-shaped slots (5) of different sizes. The rotation angle of the movable locking blocks (3) and the fixed locking block (4) is adjusted so that the three arc-shaped slots (5) of the same size face the center of the base (1). The two drive components (2) drive the two movable locking blocks (3) to move towards the center to cooperate with the fixed locking block (4) to clamp the sealing parts.

2. The high-precision machining fixture device for conical sealing parts according to claim 1, characterized in that: The driving component (2) includes an adjusting screw (21) and a sliding block (22). One end of the adjusting screw (21) passes through and is rotatably connected to the interior of the base (1) and is threadedly connected to the interior of the sliding block (22). The outer side of the sliding block (22) is slidably connected to the base (1). The movable locking block (3) is movably installed on the sliding block (22).

3. The high-precision machining fixture device for conical sealing parts according to claim 2, characterized in that: The sliding block (22) is fixedly installed with a column (221) and a first positioning rod (222). The bottom of the movable block (3) is sleeved on the column (221). The column (221) supports the movable block (3) to rotate and slide vertically. The movable block (3) has three positioning through slots (31) that cooperate with the first positioning rod (222).

4. The high-precision machining fixture device for conical sealing parts according to claim 1, characterized in that: The base (1) has a circular groove (6) for supporting the vertical sliding and rotation of the fixed block (4). A second positioning rod (7) is fixedly connected to the base (1). The fixed block (4) has three positioning through holes (41) arranged at equal distances. The second positioning rod (7) is inserted into the positioning through holes (41).

5. The high-precision machining fixture device for conical sealing parts according to claim 1, characterized in that: The base (1) has a concentric groove (8) at its center. A platform (9) slides vertically inside the concentric groove (8). A vertical screw (10) is threadedly connected to the center of the platform (9). The bottom end of the vertical screw (10) extends through to the bottom of the platform (9) and is rotatably connected to the bottom of the concentric groove (8).

6. The high-precision machining fixture device for conical sealing parts according to claim 5, characterized in that: The concentric groove (8) has two guide posts (81) fixedly connected inside, and the tops of the two guide posts (81) penetrate and slide into the interior of the stage (9).

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