A tool for machining small-diameter internal holes

Abstract

The utility model discloses a tool for small aperture inner hole processing, including the tool bar and the tool bit, the tool bar is connected with the tool bit through the installation screw rod, the inside of tool bar is provided with movable moving plate, the tool bit and installation screw rod top part are provided with the spacing column and extruding column respectively to the tool bit and installation screw rod extrusion, spacing column and extruding column move with moving plate moves and moves, compared with the prior art, the utility model has the beneficial effects that can realize double spacing structure, cooperate spring telescopic link and the linkage of moving plate, realize accurate extrusion fixed of installation screw rod and tool bit, when the tool cutting produces the vibration, extruding column closely fits installation screw rod top, spacing column closely fits tool bit top, effectively suppresses the loosening of installation screw rod because of vibration, avoids tool bit deviation or drop, ensures that tool bit always keeps steady cutting posture in the small aperture inner hole processing, reduces the workpiece rejection rate caused by tool loosening.

Description

Technical Field

[0001] This utility model relates to the field of cutting tool technology, specifically a cutting tool for machining small-diameter internal holes. Background Technology

[0002] CNC cutting tools are tools used for cutting processes in mechanical manufacturing. They are also called cutting tools. In a broad sense, cutting tools include not only cutting tools but also grinding tools. In addition to cutting inserts, CNC cutting tools also include accessories such as tool holders and tool shanks. When machining the inside of small holes, specific hole-machining tools with specific diameters are required.

[0003] Traditional cutting tools often use a single screw or snap-fit ​​structure to fix the tool head and tool holder. When cutting at high speed or machining materials with high hardness, cutting vibration can easily cause the fixing structure to loosen, resulting in tool head displacement. This not only affects the dimensional accuracy and surface roughness of internal hole machining, but may also cause tool head breakage, workpiece scrap, or even safety accidents. Based on this, this utility model designs a cutting tool for machining small-diameter internal holes to solve the above problems. Utility Model Content

[0004] This utility model provides a cutting tool for machining small-diameter internal holes, which can effectively solve the problems mentioned in the background art. Traditional cutting tools often use a single screw or snap-fit ​​structure to fix the cutting head and tool holder. When cutting at high speed or machining materials with high hardness, cutting vibration can easily cause the fixing structure to loosen, causing the cutting head to deviate. This not only affects the dimensional accuracy and surface roughness of the internal hole machining, but may also cause the cutting head to break, the workpiece to be scrapped, or even cause safety accidents.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cutting tool for machining small-diameter internal holes, comprising a tool shank and a tool head, wherein the tool shank and the tool head are connected by a mounting screw, a movable moving plate is provided inside the tool shank, and a limiting post and a pressing post for pressing the tool head and the mounting screw are respectively provided on the top of the tool head and the mounting screw, wherein the limiting post and the pressing post move with the moving plate.

[0006] A cutting tool for machining small-diameter internal holes, preferably, has a movable plate slidably connected inside the tool holder, a fixed rod installed at one end of the top of the movable plate by screws, a fixed block integrally formed at one end of the fixed rod, a rotating plate rotatably connected at one end of the fixed block, an extrusion column welded to one end of the bottom of the rotating plate, and a limit post welded to one end of the bottom of the rotating plate near the extrusion column.

[0007] A cutting tool for machining small-diameter internal holes, preferably wherein the extrusion post is located on the top surface inside the mounting screw, and the limiting post is located on the top surface of the cutting head.

[0008] A cutting tool for machining small-diameter internal holes, preferably, has a corresponding groove at the position of the tool holder corresponding to the position of the moving plate, and the outer side of the moving plate is in contact with the inner wall of the corresponding groove.

[0009] A cutting tool for machining small-diameter internal holes, preferably, has spring telescopic rods installed at both ends of the tool holder by screws, and the tops of the two spring telescopic rods are connected by a movable plate.

[0010] A cutting tool for machining small-diameter internal holes, preferably, has a movable block evenly embedded and slidably connected to the outside of the tool holder, a connecting rod welded to one end of the movable block, a limit ring connected to the top of the connecting rod by a screw, and a fixing screw connected to the inside of the limit ring by a thread.

[0011] A cutting tool for machining small-diameter internal holes, preferably, has a moving groove at the position of the moving block corresponding to the tool holder, and both the moving block and the moving groove have a T-shaped longitudinal section.

[0012] A cutting tool for machining small-diameter internal holes, preferably wherein the inner diameter of the limiting ring is equal to the width of the corresponding groove, and the limiting ring is located at the top of the tool holder.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: The structure of this utility model is scientific and reasonable, and it is safe and convenient to use. It can realize a double limiting structure, which, together with the linkage of the spring telescopic rod and the moving plate, can achieve precise compression and fixation of the mounting screw and the cutter head. When the cutting tool vibrates, the extrusion column is tightly attached to the top of the mounting screw and the limiting column is tightly attached to the top of the cutter head, which effectively suppresses the loosening of the mounting screw due to vibration, avoids the cutter head from shifting or falling off, and ensures that the cutter head always maintains a stable cutting posture during the machining of small-diameter inner holes. After the extrusion screw passes through the limit ring, it can be fixed again by rotating the fixing screw to further prevent the extrusion screw from loosening, thereby ensuring the reliability of the tool fixation, significantly improving the dimensional accuracy and surface quality of the inner hole machining, and reducing the workpiece scrap rate caused by tool loosening. Attached Figure Description

[0014] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0015] In the attached diagram: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the limiting ring installation structure of this utility model; Figure 3 This is a schematic diagram of the installation structure of the spring telescopic rod of this utility model; Figure 4 This is a schematic diagram of the extrusion screw installation structure of this utility model; The following are the labels in the diagram: 1. Tool holder; 2. Tool head; 3. Mounting screw; 4. Spring telescopic rod; 5. Moving plate; 6. Fixed rod; 7. Fixed block; 8. Rotating plate; 9. Extrusion column; 10. Limiting column; 11. Moving block; 12. Connecting rod; 13. Limiting ring; 14. Fixed screw. Detailed Implementation

[0016] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0017] Example: Figure 1-4 As shown, this utility model provides a technical solution for machining small-diameter internal holes, including a tool holder 1 and a tool head 2. The tool holder 1 and the tool head 2 are connected by a mounting screw 3. Both ends of the tool holder 1 are fitted with spring telescopic rods 4 by screws. The tops of the two spring telescopic rods 4 are connected by a moving plate 5. A fixing rod 6 is fitted with a screw at one end of the top of the moving plate 5. A fixing block 7 is integrally formed at one end of the fixing rod 6. A rotating plate 8 is rotatably connected to one end of the fixing block 7. An extrusion column 9 is welded to one end of the bottom of the rotating plate 8. A limit post 10 is welded to one end of the bottom of the rotating plate 8 near the extrusion column 9.

[0018] The extrusion column 9 is located on the top surface inside the mounting screw 3, and the limiting column 10 is located on the top surface of the cutter head 2. The limiting measures are applied to the top of the mounting screw 3 and the cutter head 2 respectively, ensuring the stability of the cutter head 2 and the mounting screw 3.

[0019] The tool holder 1 has a corresponding groove at the position of the moving plate 5. The outer side of the moving plate 5 is in contact with the inner wall of the corresponding groove to ensure the stability of the movement of the moving plate 5.

[0020] A sliding block 11 is evenly embedded on the outer side of the tool holder 1. A connecting rod 12 is welded to one end of the sliding block 11. A limit ring 13 is connected to the top of the connecting rod 12 by a screw. A fixing screw 14 is connected to the inside of the limit ring 13 by a thread.

[0021] A moving groove is provided at the position of the tool holder 1 corresponding to the moving block 11. Both the moving block 11 and the moving groove have a T-shaped longitudinal section to prevent the moving block 11 from falling off.

[0022] The inner diameter of the limiting ring 13 is equal to the width of the corresponding groove. The limiting ring 13 is located at the top of the tool holder 1, so that the extrusion screw on the tool holder can pass through the limiting ring 13 and extrusion screw can extrude the moving plate 5.

[0023] After the operator places the cutter bar 1 on top of the cutter, the operator rotates the rotating plate 8 to rotate the extrusion column 9 and the limiting column 10 to the top of the cutter head 2 and the mounting screw 3. The operator then uses the extrusion screw on the cutter to extrude force on the cutter bar 1. The extrusion screw pushes the moving plate 5 to move, which in turn moves the fixing rod 6 and the fixing block 7, thereby moving the extrusion column 9 and the limiting column 10. Through the extrusion column 9 and the limiting column 10 extruding force on the mounting screw 3 and the cutter head 2, the stability of the mounting screw 3 and the cutter head 2 during use is further ensured. This prevents the mounting screw 3 from loosening due to vibration during cutting, thus ensuring the accuracy of the cutter head 2 in cutting the parts. When the operator presses the moving plate 5 with the pressing screw, the operator causes the pressing screw to pass through the limiting ring 13. When the operator presses the tool bar 1 with the pressing screw, the operator further fixes the pressing screw by rotating the fixing screw 14, thereby ensuring the stability of the tool fixation and ensuring the use of the tool. Furthermore, the position of the limiting ring 13 can be adjusted by moving the moving block 11, allowing the tool to be placed in different positions on the tool holder to achieve tool fixation.

[0024] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A cutting tool for machining small-diameter internal holes, comprising a tool holder (1) and a tool head (2), characterized in that: The cutter bar (1) and the cutter head (2) are connected by a mounting screw (3). The cutter bar (1) is provided with a movable moving plate (5). The cutter head (2) and the mounting screw (3) are respectively provided with a limiting post (10) and a pressing post (9) for pressing the cutter head (2) and the mounting screw (3). The limiting post (10) and the pressing post (9) move with the moving plate (5).

2. The cutting tool for machining small-diameter internal holes according to claim 1, characterized in that, The tool holder (1) is slidably connected to a movable plate (5). A fixing rod (6) is installed on the top end of the movable plate (5) by screws. A fixing block (7) is integrally formed on one end of the fixing rod (6). A rotating plate (8) is rotatably connected to one end of the fixing block (7). An extrusion column (9) is welded to one end of the bottom of the rotating plate (8). A limit column (10) is welded to one end of the bottom of the rotating plate (8) near the extrusion column (9).

3. A cutting tool for machining small-diameter internal holes according to claim 2, characterized in that, The extrusion column (9) is located on the top surface inside the mounting screw (3), and the limiting column (10) is located on the top surface of the cutter head (2).

4. A cutting tool for machining small-diameter internal holes according to claim 2, characterized in that, The tool holder (1) has a corresponding groove at the position of the moving plate (5), and the outer side of the moving plate (5) is in contact with the inner wall of the corresponding groove.

5. A cutting tool for machining small-diameter internal holes according to claim 2, characterized in that, Both ends of the cutter bar (1) are fitted with spring telescopic rods (4) by screws, and the tops of the two spring telescopic rods (4) are connected by a moving plate (5).

6. A cutting tool for machining small-diameter internal holes according to claim 1, characterized in that, The tool holder (1) is uniformly embedded and slidably connected with a moving block (11). A connecting rod (12) is welded to one end of the moving block (11). A limit ring (13) is connected to the top of the connecting rod (12) by a screw. A fixing screw (14) is connected to the inside of the limit ring (13) by a thread.

7. A cutting tool for machining small-diameter internal holes according to claim 6, characterized in that, The tool holder (1) has a moving groove at the position corresponding to the moving block (11), and both the moving block (11) and the moving groove have a T-shaped longitudinal section.

8. A cutting tool for machining small-diameter internal holes according to claim 6, characterized in that, The inner diameter of the limiting ring (13) is equal to the width of the corresponding groove, and the limiting ring (13) is located at the top of the tool holder (1).

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