Positioning device for machining valve stem of internal combustion engine

Abstract

The utility model discloses a positioning device for internal combustion engine valve rod processing relates to internal combustion engine processing technical field, the utility model discloses, including: workstation, the top fixed connection of workstation has fixed device, the fixed device carries out clamping fixed to the stem of processing object, through setting the cooperation of fixed device and positioning device, the cooperation structure of fixed device adopts vertical board and rotatable fixed plate, and the locking mode of combination fixed column and bolt can form stable rigid clamping to the valve rod of specific specification, effectively resist the cutting force and vibration influence in the processing process, avoid the displacement or loosening of valve rod, and the double location of positioning device through the placement groove and positioning plate, cooperate the restraint of limiting block and positioning block to valve rod end, realize the unity of positioning reference, accurate limit the space position of valve rod, and rubber pad and valve rod surface flexible contact can avoid the surface damage caused by hard contact, and can increase the purpose of contact friction.

Description

Technical Field

[0001] This utility model relates to the field of internal combustion engine processing technology, specifically a positioning device for processing internal combustion engine valve stems. Background Technology

[0002] As a core component of the engine's intake and exhaust system, the valve stem of an internal combustion engine directly affects the engine's sealing performance, intake efficiency, and operational stability. Therefore, the reliability and precision of positioning and clamping are extremely important during the valve stem machining process.

[0003] In valve stem machining, the positioning device is a key piece of equipment to ensure machining accuracy. It needs to achieve precise radial and axial positioning of the valve stem, while resisting the influence of external forces such as cutting forces and vibrations, and preventing displacement, deformation, or surface damage to the valve stem. However, some existing positioning devices for internal combustion engine valve stem machining are complex in design, with a large number of parts and complicated connections. This not only makes the assembly process complicated and the debugging difficult, but also requires the disassembly of multiple parts for subsequent maintenance. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a positioning device for machining valve stems of internal combustion engines, which solves the problem of insufficient positioning accuracy in existing valve stem positioning devices.

[0005] (II) Technical Solution

[0006] To solve the above problems, this utility model achieves the following technical solution: a positioning device for machining valve stems of internal combustion engines, comprising: a worktable, a fixing device fixedly connected to the top of the worktable, the fixing device clamping and fixing the rod body of the workpiece, the positioning device fixedly connected to the top of the worktable, the fixing device including a vertical plate, a fixing plate rotatably connected to the inner wall of the vertical plate, a fixing column slidably connected to the inner wall of the fixing plate, the fixing column locking the fixing plate with bolts, the fixing device adopts a combination structure of vertical plate and rotatable fixing plate, combined with the locking method of fixing column and bolts, can form a rigid clamping of valve stem bodies of a specific diameter, the clamping force is stable and not easy to loosen, effectively offsetting the influence of external forces such as cutting force and vibration during the machining process, and avoiding radial or axial displacement of the valve stem.

[0007] Preferably, the bottom end of the upright plate is fixedly connected to the top end of the workbench, and the bottom ends of the upright plate are arranged in a linear array along the top end of the workbench, while the bottom end of the fixed column is fixedly connected to the top end of the workbench.

[0008] Preferably, a limiting block is fixedly connected to the bottom end of the fixed plate, and a positioning block is fixedly connected to the top end of the worktable. The bottom end of the limiting block and the inner wall of the positioning block are in contact with the workpiece. The core components such as the upright plate, fixed plate, and positioning plate are all connected by direct fixing, sliding, or rotation. The assembly process is simple and does not require complicated debugging.

[0009] Preferably, the positioning device includes a positioning plate, and a placement groove is provided at the top of the worktable. The inner wall of the placement groove is in contact with the outer wall of the workpiece. The positioning device accurately limits the radial position of the valve stem through the dual limiting of the placement groove and the positioning plate. Combined with the axial constraint of the valve stem end by the limiting block and the positioning block, the positioning reference is unified.

[0010] Preferably, the sidewall of the positioning plate is in contact with the outer wall of the workpiece, and the bottom end of the positioning plate is fixedly connected to the top end of the worktable.

[0011] Preferably, the positioning device further includes a rubber pad, the bottom end of which is bonded to the top of the worktable, and the top end of which is in contact with the outer wall of the workpiece. The rubber pad can increase the friction between the positioning surface and the valve stem, further improve the clamping stability, and reduce product scrap caused by slight slippage during processing.

[0012] Beneficial effects

[0013] This utility model provides a positioning device for machining valve stems of internal combustion engines. It has the following advantages:

[0014] This utility model, through the combination of a fixing device and a positioning device, uses a structure of a vertical plate and a rotatable fixing plate, combined with a locking method of fixing columns and bolts, to form a stable and rigid clamp for valve stems of specific specifications. This effectively resists the effects of cutting forces and vibrations during processing, preventing displacement or loosening of the valve stem. The positioning device, through the dual limiting of the placement groove and the positioning plate, combined with the constraint of the valve stem end by the limiting block and the positioning block, achieves a unified positioning reference and accurately defines the spatial position of the valve stem. The rubber pad makes flexible contact with the valve stem surface, which not only avoids surface damage caused by hard contact but also increases contact friction, further enhancing positioning stability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the positioning device of this utility model;

[0017] Figure 3 This is a schematic diagram of the fixing device of this utility model;

[0018] Figure 4This is a cross-sectional structural diagram of the fixing device of this utility model.

[0019] In the diagram: 1. Workbench; 2. Fixing device; 20. Vertical plate; 21. Fixing plate; 22. Fixing column; 23. Limiting block; 24. Positioning block; 3. Positioning device; 30. Positioning plate; 31. Placement groove; 32. Rubber pad. Detailed Implementation

[0020] 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.

[0021] Example

[0022] Please see Figures 1-4 This utility model provides a technical solution: a positioning device for machining valve stems of internal combustion engines, comprising:

[0023] Workbench 1, with a fixing device 2 fixedly connected to the top of workbench 1. The fixing device 2 clamps and fixes the rod of the workpiece. A positioning device 3 is fixedly connected to the top of workbench 1. In use, the positioning device 3 for processing valve rod of this internal combustion engine uses workbench 1 as the installation base. Through the coordinated cooperation of fixing device 2 and positioning device 3, accurate positioning and stable clamping are achieved in the valve rod processing process.

[0024] The fixing device 2 includes a vertical plate 20, with a fixing plate 21 rotatably connected to the inner wall of the vertical plate 20. A fixing column 22 is slidably connected to the inner wall of the fixing plate 21. The fixing column 22 locks the fixing plate 21 with bolts. The bottom end of the vertical plate 20 is fixedly connected to the top end of the worktable 1, and the bottom end of the vertical plate 20 is arranged in a linear array along the top end of the worktable 1. The bottom end of the fixing column 22 is fixedly connected to the top end of the worktable 1. A limit block 23 is fixedly connected to the bottom end of the fixing plate 21. A positioning block 24 is fixedly connected to the top end of the worktable 1. The bottom end of the limit block 23 and the inner wall of the positioning block 24 are in contact with the workpiece. After the radial position of the valve stem is initially determined, axial constraint is achieved through the positioning block 24 and the limit block 23. The positioning block 24 is fixed to the top end of the worktable 1, and the limit block 23 is connected to the bottom end of the fixing plate 21. When the valve stem... When the valve stem is in contact with the inner wall of the positioning block 24, the fixing plate 21 connected to the inner wall of the vertical plate 20 is rotated so that the bottom end of the limiting block 23 contacts the outer wall of the valve stem, forming a bidirectional axial limiting to ensure that the valve stem will not move axially during processing. After positioning, the fixing device 2 is used for rigid clamping. The fixing plate 21 rotates along the inner wall of the vertical plate 20 to a position that fits the valve stem. Its inner wall slides with the fixing column 22. After adjusting to a suitable clamping angle, the fixing plate 21 is locked with bolts to form a stable connection between the fixing plate 21 and the fixing column 22, applying a uniform clamping force to the valve stem. The vertical plates 20 are arranged in an orderly manner along the top of the worktable 1, which can provide multi-point uniform support for the valve stem. Combined with the rigid clamping of the fixing plate 21, it can effectively resist the cutting force and vibration during processing and prevent the valve stem from radial or axial displacement.

[0025] The positioning device 3 includes a positioning plate 30. A placement groove 31 is provided at the top of the worktable 1. The inner wall of the placement groove 31 is in contact with the outer wall of the workpiece. The side wall of the positioning plate 30 is in contact with the outer wall of the workpiece. The bottom end of the positioning plate 30 is fixedly connected to the top of the worktable 1. Before processing, the valve seat of the valve stem is placed in the placement groove 31 at the top of the worktable 1. The inner wall of the placement groove 31 is in contact with the outer wall of the valve seat of the valve stem, which initially defines the radial reference position of the valve stem. The side wall of the positioning plate 30 is in close contact with the bottom end of the valve stem and valve seat, which further enhances the radial limiting effect and prevents the valve stem from lateral displacement. At the same time, the rubber pad 32 at the top of the worktable 1 is in flexible contact with the side wall of the valve stem and valve seat. This reduces the risk of damage caused by hard contact through the buffering properties of the rubber material and improves the initial stability of the valve stem after placement by means of the friction of the contact surface.

[0026] The positioning device 3 also includes a rubber pad 32. The bottom end of the rubber pad 32 is bonded to the top end of the worktable 1, and the top end of the rubber pad 32 is in contact with the outer wall of the workpiece. During the processing, the rubber pad 32 continuously makes flexible contact with the outer wall of the valve stem, and the clamping stability is further improved by friction. The limiting block 23 and the positioning block 24 always maintain the constraint on the valve stem body. The positioning plate 30 and the placement groove 31 continuously limit the radial position. The fixing device 2 after the bolt is locked forms a rigid clamping structure that cannot be loosened. The three together constitute a comprehensive stability guarantee system.

[0027] When in use, the positioning device 3 for machining valve stems of internal combustion engines uses the worktable 1 as the installation base. Through the coordinated cooperation of the fixing device 2 and the positioning device 3, the precise positioning and stable clamping of the valve stem during the machining process are achieved.

[0028] Before processing, the valve seat of the valve stem is placed in the placement groove 31 at the top of the workbench 1. The inner wall of the placement groove 31 fits against the outer wall of the valve seat of the valve stem, initially defining the radial reference position of the valve stem. The side wall of the positioning plate 30 is in close contact with the bottom end of the valve stem and valve seat, further enhancing the radial limiting effect and preventing the valve stem from lateral displacement. At the same time, the rubber pad 32 at the top of the workbench 1 is in flexible contact with the side wall of the valve stem and valve seat. This reduces the risk of damage caused by hard contact through the buffering properties of the rubber material, and also improves the initial stability of the valve stem after placement by means of the friction of the contact surface.

[0029] After the radial position of the valve stem is initially determined, axial constraint is achieved through positioning block 24 and limiting block 23. Positioning block 24 is fixed to the top of workbench 1, and limiting block 23 is connected to the bottom end of fixing plate 21. When the valve stem body is in contact with the inner wall of positioning block 24, the fixing plate 21 connected to the inner wall of vertical plate 20 is rotated, so that the bottom end of limiting block 23 contacts the outer wall of valve stem body, forming a bidirectional axial limit to ensure that the valve stem will not move axially during processing. After positioning is completed, rigid clamping is achieved through fixing device 2. 1. Rotate along the inner wall of the vertical plate 20 to fit the valve stem body. Its inner wall slides with the fixed column 22. After adjusting to a suitable clamping angle, use bolts to lock the fixed plate 21, so that the fixed plate 21 and the fixed column 22 form a stable connection, and apply a uniform clamping force to the valve stem body. The vertical plates 20 are arranged in an orderly manner along the top of the worktable 1, which can form a multi-point uniform support for the valve stem. Combined with the rigid clamping of the fixed plate 21, it can effectively resist the cutting force and vibration during the processing and avoid radial or axial displacement of the valve stem.

[0030] During processing, the rubber pad 32 continuously makes flexible contact with the outer wall of the valve stem, further improving the clamping stability through friction. The limiting block 23 and the positioning block 24 always maintain the constraint on the valve stem body. The positioning plate 30 and the placement groove 31 continuously limit the radial position. The fixing device 2 after the bolt is locked forms a rigid clamping structure that cannot be loosened. The three together constitute a comprehensive stability guarantee system.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0032] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A positioning device for machining valve stems of internal combustion engines, comprising: A workbench (1) is characterized in that: a fixing device (2) is fixedly connected to the top of the workbench (1), the fixing device (2) clamps and fixes the rod of the workpiece, and a positioning device (3) is fixedly connected to the top of the workbench (1); the fixing device (2) includes a vertical plate (20), a fixing plate (21) is rotatably connected to the inner wall of the vertical plate (20), a fixing column (22) is slidably connected to the inner wall of the fixing plate (21), and the fixing column (22) locks the fixing plate (21) with bolts.

2. The positioning device for machining valve stems of an internal combustion engine according to claim 1, characterized in that: The bottom end of the upright plate (20) is fixedly connected to the top end of the workbench (1), and the bottom end of the upright plate (20) is arranged in a linear array along the top end of the workbench (1). The bottom end of the fixed column (22) is fixedly connected to the top end of the workbench (1).

3. The positioning device for machining valve stems of an internal combustion engine according to claim 1, characterized in that: The bottom end of the fixed plate (21) is fixedly connected to a limiting block (23), and the top end of the worktable (1) is fixedly connected to a positioning block (24). The bottom end of the limiting block (23) and the inner wall of the positioning block (24) are in contact with the workpiece.

4. The positioning device for machining valve stems of an internal combustion engine according to claim 1, characterized in that: The positioning device (3) includes a positioning plate (30), and a placement groove (31) is provided at the top of the workbench (1). The inner wall of the placement groove (31) is in contact with the outer wall of the workpiece.

5. A positioning device for machining valve stems of an internal combustion engine according to claim 4, characterized in that: The side wall of the positioning plate (30) is in contact with the outer wall of the workpiece, and the bottom end of the positioning plate (30) is fixedly connected to the top end of the worktable (1).

6. A positioning device for machining valve stems of an internal combustion engine according to claim 4, characterized in that: The positioning device (3) also includes a rubber pad (32), the bottom end of which is bonded to the top end of the worktable (1), and the top end of which is in contact with the outer wall of the workpiece.

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