A taper hole boring tool

Abstract

The application provides a taper hole boring tool, and relates to the technical field of boring equipment, which comprises a tool head with a mounting hole in the tool head, the axis of the mounting hole intersecting the axis of the tool head; an adjusting rod sliding through the mounting hole; a blade installed at one end of the adjusting rod; an elastic piece movably arranged in the mounting hole and located between the adjusting rod and a pressing plate; the pressing plate movably arranged in the mounting hole and located between the elastic piece and a fastening screw; the fastening screw being in threaded connection with the tool head; the rod part of the fastening screw being capable of being pressed against the side of the pressing plate away from the elastic piece; and the length of the elastic piece and the length of the pressing plate both being greater than the diameter of the rod part of the fastening screw. After the extension length of the adjusting rod is changed, the fastening screw is tightened, the arc-shaped elastic piece is flattened, the contact area between the elastic piece and the adjusting rod is increased, and thus the situation that the adjusting rod is unevenly stressed and is not stably fastened due to the fact that the adjusting rod is only partially stressed is avoided.

Description

Technical Field

[0001] This utility model relates to the field of boring equipment technology, and in particular to a tapered boring tool. Background Technology

[0002] Many of our connector parts feature a double-sided 24° tapered hole structure. This tapered hole is located at the lug in the middle of the part. Due to the part's structure, the lug has poor rigidity, and machining both sides of the tapered hole requires relatively long cutting tools. The traditional machining method involves milling to leave a allowance of 0.02-0.05mm, then having a fitter polish it to a allowance of 0.01-0.02mm, and finally grinding it to the acceptable dimensions using a custom grinding rod. This method demands exceptionally high fitter skills, is time-consuming and labor-intensive, and carries a significant risk of exceeding tolerances and scrapping the parts.

[0003] Therefore, after milling, boring is now used instead of bench polishing. Boring refers to further machining of a hole. Boring can enlarge the hole diameter, improve accuracy, reduce surface roughness, and also better correct the original hole axis misalignment. Boring cutters are used for boring operations. With the adoption of boring, a tapered hole boring cutter needs to be designed, and considering that future parts may have tapered hole structures with different angles, the boring angle of the tapered hole boring cutter should be adjustable.

[0004] The prior art (patent document with application number CN202320078879.6) discloses a special tool for boring tapered holes, which can meet the requirement of adjustable boring angle. However, there is an assembly gap between the boring tool and the tool holder. The boring tool is only fastened by adjusting bolts, resulting in a small contact area and defects such as uneven force on the boring tool and unsatisfactory fastening force. There is still room for further improvement. Utility Model Content

[0005] In view of the above situation, this utility model provides a tapered hole boring tool, which aims to solve the technical problems in the prior art where there is an assembly gap between the boring tool and the tool holder, and the boring tool is only fastened by adjusting bolts, resulting in a small contact area, uneven force on the boring tool, and unsatisfactory fastening force.

[0006] To achieve the above objectives, this utility model provides the following technical solution: This utility model provides a tapered boring tool, comprising: A cutting head having a mounting hole therein, the axis of which intersects the axis of the cutting head; The adjusting rod slides through the mounting hole; A blade is mounted on one end of the adjusting rod; A spring clip is movably disposed within the mounting hole and located between the adjusting rod and the pressure plate; The pressure plate is movably disposed within the mounting hole and located between the spring and the fastening screw; A fastening screw is threadedly connected to the cutter head; The shank of the fastening screw can be pressed against the side of the pressure plate away from the spring piece; the lengths of both the spring piece and the pressure plate are greater than the diameter of the shank of the fastening screw; the spring piece is arc-shaped in its natural state.

[0007] In some embodiments of this utility model, the cutter head further comprises a guide hole, a screw hole, and a receiving hole that are connected in sequence. The guide hole is connected to the mounting hole, the screw hole is used to connect the fastening screw, and the receiving hole is located on the end face of the cutter head.

[0008] In some embodiments of this utility model, the tapered boring tool further includes a sliding column, which is connected to one side of the pressure plate and slidably connected to the guide hole.

[0009] In some embodiments of this invention, one side of the slide column faces the fastening screw and is horizontal.

[0010] In some embodiments of this utility model, the tapered boring tool further includes a guide rod, one end of which is connected to the middle of the spring piece, and the other end slides through the pressure plate and is slidably connected to the sliding column.

[0011] In some embodiments of this utility model, the cutter head is connected to a cutter bar, and the cutter bar includes multiple segments, which are threadedly connected to each other.

[0012] In some embodiments of this utility model, the tapered boring tool further includes an adjusting roller, which is rotatably disposed inside the tool head, and the adjusting rod is located between the adjusting roller and the spring piece, with the circumferential side of the adjusting roller in rolling contact with the side wall of the adjusting rod.

[0013] In some embodiments of this utility model, the tapered boring tool further includes an adjusting screw, which is connected to one end of the adjusting roller.

[0014] The embodiments of this utility model have at least the following advantages or beneficial effects: 1. After loosening the fastening screw, the boring angle of the cutting tool can be indirectly adjusted by changing the extension length of the adjusting rod.

[0015] 2. After changing the extension length of the adjusting rod, tighten the fastening screw. The fastening screw presses against the pressure plate, and the pressure plate then presses against the spring piece located between the adjusting rod and the pressure plate, flattening the arc-shaped spring piece and increasing the contact area between the spring piece and the adjusting rod. This avoids uneven force on the adjusting rod and unstable fastening caused by only localized force on the adjusting rod.

[0016] 3. When the fastening screw is loosened or even completely loosened, the spring is arc-shaped, and the apex of the arc can make point contact with the adjusting rod. There is still friction between the two to prevent the adjusting rod from suddenly slipping out and falling when the fastening screw is loosened. That is, when loosening the fastening screw, there is no need to hold the adjusting rod, and it can be operated with one hand.

[0017] Other features and advantages of this invention will be set forth in the following description. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a tapered boring tool; Figure 2 This is a schematic diagram of the cutter head and adjusting rod. Figure 3 This is a schematic diagram of the adjusting roller and adjusting screw.

[0020] icon: 1-Tool holder, 2-Tool shaft 3-Cutter head, 31-Mounting hole, 32-Guide hole, 33-Threaded hole, 34-Receiving hole 4-Adjusting rod, 5-Blade 6-Strip, 61-Guide rod, 7-Pressure plate, 71-Sliding column, 8 - Adjusting roller, 9 - Adjusting screw. Detailed Implementation

[0021] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention.

[0022] In the description of the embodiments of this utility model, it should be understood that the terms "length", "inner", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of 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 the embodiments of this utility model.

[0023] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" 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 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. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0024] The embodiments of this utility model will be described in detail below.

[0025] Example 1

[0026] See Figures 1-2 This embodiment provides a tapered boring tool, which includes a tool holder 1, a tool bar 2 and a tool head 3 connected in sequence by threads, and also includes an adjusting rod 4, a cutting blade 5, a spring 6, a pressure plate 7 and a fastening screw.

[0027] Tool holder 1 is used to connect to the horizontal turning face of a horizontal boring machine.

[0028] The tool holder 2 comprises multiple segments connected by threads, allowing for flexible adjustment of its length to meet different needs, such as long or short tool holders. The tool holder 2 is made of alloy steel, such as 42CrMoA alloy steel.

[0029] The cutter head 3 has a mounting hole 31, which is inclined and its axis intersects with the axis of the cutter head 3. The cutter head 3 also has a guide hole 32, a screw hole 33, and a receiving hole 34 that are coaxial and connected in sequence. The inner wall of the screw hole 33 has threads. The guide hole 32 is connected to the mounting hole 31. The receiving hole 34 is located on the end face of the cutter head 3. The diameters of the guide hole 32 and the screw hole 33 are equal, but the diameter of the screw hole 33 is smaller than the diameter of the receiving hole 34. The receiving hole 34 is used to accommodate the head of the fastening screw.

[0030] The adjusting rod 4 slides through the mounting hole 31, and one end of the adjusting rod 4 has a cutting groove. The adjusting rod 4 is inclined relative to the cutting head 3.

[0031] The blade 5 is mounted in the tool groove by screws and is used for boring.

[0032] The spring piece 6 is movably disposed within the mounting hole 31 and located between the adjusting rod 4 and the guide hole 32. The spring piece 6 is made of a flexible metal material. The spring piece 6 is arc-shaped in its natural state.

[0033] The pressure plate 7 is movably disposed within the mounting hole 31 and is located between the spring piece 6 and the guide hole 32.

[0034] The shank of the fastening screw connects to the screw hole 33, and the end face of the shank of the fastening screw can press against the side of the pressure plate 7 away from the spring piece 6. The lengths of both the spring piece 6 and the pressure plate 7 are greater than the diameter of the shank of the fastening screw.

[0035] After loosening the fastening screw, the boring angle of the blade 5 can be indirectly adjusted by changing the extension length of the adjusting rod 4. After changing the extension length of the adjusting rod 4, tightening the fastening screw causes the screw to press against the pressure plate 7, which in turn presses against the spring piece 6 located between the adjusting rod 4 and the pressure plate 7. This flattens the arc-shaped spring piece 6, increasing the contact area between the spring piece 6 and the adjusting rod 4. This prevents uneven force distribution and unstable fastening of the adjusting rod 4 due to only localized force. Furthermore, even when the fastening screw is loosened or completely loosened, the arc-shaped spring piece 6 can make point contact with the adjusting rod 4, maintaining friction between them. This prevents the adjusting rod 4 from suddenly slipping out and falling when the fastening screw is loosened. In other words, the adjusting rod 4 can be operated with one hand without holding it while the fastening screw is loosened.

[0036] Example 2

[0037] See Figures 1-2 The tapered boring tool also includes a sliding column 71 and a guide rod 61.

[0038] The slide column 71 is connected to one side of the pressure plate 7 and is slidably connected to the guide hole 32. One side of the slide column 71 faces the fastening screw and is horizontal.

[0039] One end of the guide rod 61 is connected to the middle of the spring piece 6, and the other end slides through the pressure plate 7 and is slidably connected to the slide column 71.

[0040] By setting the sliding column 71, on the one hand, it can guide the movement of the pressure plate 7, and on the other hand, the horizontal side of the sliding column 71 has a larger contact area with the fastening screw, making the fastening force more stable.

[0041] Example 3

[0042] See Figures 1-3 The tapered boring tool also includes an adjusting roller 8 and an adjusting screw 9.

[0043] The adjusting roller 8 is rotatably disposed inside the cutter head 3, and the adjusting rod 4 is located between the adjusting roller 8 and the spring plate 6. The circumferential side of the adjusting roller 8 rolls in contact with the side wall of the adjusting rod 4. The adjusting roller 8 is used to change the extension length of the adjusting rod 4.

[0044] The adjusting screw 9 is connected to one end of the adjusting roller 8. The adjusting screw 9 allows for easy rotation of the adjusting roller 8 to change the extension length of the adjusting rod 4.

[0045] After loosening the fastening screw, the adjusting screw 9 can be rotated to rotate the adjusting roller 8. The friction between the adjusting roller 8 and the adjusting rod 4 (provided by the force of the spring 6 restoring its original shape) causes the adjusting rod 4 to slide within the mounting hole 31, thereby conveniently changing the extension length of the adjusting rod 4. This is especially suitable for fine-tuning the extension length of the adjusting rod 4 (rotating the adjusting screw 9 is more controllable than sliding the adjusting rod 4 by hand).

[0046] Furthermore, a scale is provided on one side of the adjusting rod 4 to reflect the extension length of the adjusting rod 4, which makes it more intuitive.

[0047] Finally, it should be noted that the above are merely preferred embodiments of this application and are not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Without conflict, the embodiments and features described in the embodiments of this application can be arbitrarily combined with each other. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A tapered boring tool, characterized in that, include: A cutting head having a mounting hole therein, the axis of which intersects the axis of the cutting head; The adjusting rod slides through the mounting hole; A blade is mounted on one end of the adjusting rod; A spring clip is movably disposed within the mounting hole and located between the adjusting rod and the pressure plate; The pressure plate is movably disposed within the mounting hole and located between the spring and the fastening screw; A fastening screw is threadedly connected to the cutter head; The shank of the fastening screw can be pressed against the side of the pressure plate away from the spring piece; the lengths of both the spring piece and the pressure plate are greater than the diameter of the shank of the fastening screw; the spring piece is arc-shaped in its natural state.

2. The tapered boring tool according to claim 1, characterized in that, The cutter head also has a guide hole, a screw hole, and a receiving hole connected in sequence. The guide hole is connected to the mounting hole, the screw hole is used to connect the fastening screw, and the receiving hole is located on the end face of the cutter head.

3. The tapered boring tool according to claim 2, characterized in that, The tapered boring tool also includes a sliding column, which is connected to one side of the pressure plate and slidably connected to the guide hole.

4. The tapered boring tool according to claim 3, characterized in that, One side of the slide bar faces the fastening screw and is horizontal.

5. The tapered boring tool according to claim 3, characterized in that, The tapered boring tool also includes a guide rod, one end of which is connected to the middle of the spring piece, and the other end slides through the pressure plate and is slidably connected to the sliding column.

6. The tapered boring tool according to claim 1, characterized in that, The cutter head is connected to a cutter bar, which includes multiple segments connected by threads.

7. The tapered boring tool according to any one of claims 1 to 6, characterized in that, The tapered boring tool also includes an adjusting roller, which is rotatably disposed inside the tool head. The adjusting rod is located between the adjusting roller and the spring plate, and the circumferential side of the adjusting roller makes rolling contact with the side wall of the adjusting rod.

8. The tapered boring tool according to claim 7, characterized in that, The tapered boring tool also includes an adjusting screw, which is connected to one end of the adjusting roller.

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