Deep hole machining self-positioning taper reamer

Abstract

The utility model discloses a deep hole processing self -positioning taper reamer, including the light pole section, is provided with a plurality of self -positioning section to the part of light pole section close to the blade section, the blade section and light pole section junction still be provided with straight section, the self -positioning section and straight section are all not open the blade structure of slot, through setting the self -positioning section of not open the blade of slot in light pole section, and the straight section of not open the blade of slot in the blade section and light pole section junction also, the cutter in the process of stretching into deep hole blind hole, these non - cutting parts can be closely matched with the straight section hole wall of having been processed, realizes reliable self -positioning and guiding effect, effectively solved the reaming axial displacement error of current technique because of the inability self -positioning, has improved the stability of processing process significantly, has laid the foundation for high -precision processing. Guarantee straight section hole size accuracy, avoid the overproof, and effectively avoid the scratch that the forming tool can cause to the processed surface in the processing process.

Description

Technical Field

[0001] This utility model relates to the field of cutting tool processing technology, specifically to a self-positioning tapered reamer for deep hole machining. Background Technology

[0002] In the deep hole machining of rudder wings, the upper rudder surface is usually machined as a blind hole. There is a tapered hole section at the bottom of the blind hole. The formation of the tapered hole section is mainly related to the mating with the rotating shaft. Currently, the tapered machining of blind holes in rudder wings is carried out using ordinary form milling cutters. There is a mating error between the tapered surface of the machined hole and the mating surface of the rotating shaft. Self-positioning cannot be achieved during the reaming process, resulting in axial offset error after the reaming is completed, and high-precision tapered machining of blind holes cannot be achieved.

[0003] Existing technical solutions: The existing machining method uses a form milling cutter to machine the taper after making the bottom hole. The taper hole produced by this method has a large error. The diameter of the straight section hole connected to the taper hole is out of tolerance due to insufficient rigidity of the reamer. Because self-positioning cannot be achieved, and most of the deep holes of the rudder are quite deep with high machining accuracy requirements, the current method has low machining efficiency, cannot achieve self-positioning in the machining of deep hole blind hole tapers, has poor accuracy of the taper size after machining, and the form milling cutter is prone to scratching the machined surface during the taper hole reaming process.

[0004] Chinese invention patent CN109719347A discloses a multi-bladed left-handed high-spiral push reamer, including a shank and a guide rod. Multiple cooperating cutting edges are arranged along the circumference of the guide rod, and the cutting edges are sequentially divided into a roughing section, a straightening section, a semi-finishing section, and a finishing section from the head to the tail of the guide rod. The roughing section has a taper, and a left-handed straight groove is provided between two adjacent roughing sections. An axial straight groove is provided between two adjacent straightening sections. The machining diameter of the straightening section is smaller than the maximum machining diameter of the roughing section. A reverse tapered groove is provided on one side of the straightening section, connecting with the semi-finishing section. The semi-finishing section also has a taper, and left-handed high-spiral grooves are provided between two adjacent semi-finishing sections and between two adjacent finishing sections. The roughing section is used to mill 80%-90% of the total machining volume, and the semi-finishing section is used to mill 10%-20% of the total machining volume. This invention can form a channel in one step, with high machining quality and good stability, and can be manufactured using common materials, resulting in low cost. However, it lacks a positioning part. Summary of the Invention

[0005] The purpose of this invention is to provide a self-positioning tapered reamer for deep hole machining.

[0006] The technical solution of this utility model is: a self-positioning tapered reamer for deep hole machining, including a smooth rod section, a plurality of self-positioning sections are provided in the part of the smooth rod section near the cutting edge section, and a straight section is also provided at the connection between the cutting edge section and the smooth rod section;

[0007] Both the self-positioning section and the straight section are slotted, non-sharpened structures.

[0008] Preferably, the self-positioning section is a 6-slotted, non-slotted structure, and its outer diameter is larger than that of the smooth rod section.

[0009] Preferably, the optical rod segment is provided with two self-positioning segments.

[0010] Preferably, the cutting edge is tapered with a taper of 9°.

[0011] Preferably, the other end of the polished rod section is provided with a tool holder connecting section.

[0012] Preferably, the handle connecting section, polished rod section, self-positioning section, straight section and sharpening section are integrated into a single structure.

[0013] The beneficial effects of this utility model are:

[0014] 1. This reamer features a slotted, non-sharpened self-positioning section on the smooth shank and a similarly slotted, non-sharpened straight section at the connection between the sharpened and smooth shank sections. During insertion into deep or blind holes, these non-cutting parts tightly engage with the machined straight section hole wall, achieving reliable self-positioning and guiding. This effectively solves the axial offset error caused by the inability to self-position in existing technologies, significantly improving the stability of the machining process and laying the foundation for high-precision machining. It also ensures the dimensional accuracy of the straight section hole, avoiding deviations, and effectively prevents scratches on the machined surface that might be caused by the forming tool during machining.

[0015] 2. The integral structural design and self-positioning of this reamer provide machining stability, enabling smoother deep hole blind hole taper machining and reducing rework caused by inaccurate positioning and dimensional errors. This improves machining efficiency and better meets the machining requirements of deep holes in rudder wings. The overall rigidity and integral structure reduce vibration and deformation. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the specific embodiments of this utility model, 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a self-positioning tapered reamer structure for deep hole machining;

[0018] Attached reference numerals: 1-Handle connecting section, 2-Smooth shaft section, 3-Self-positioning section, 4-Straight section; 5-Sharpening section. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. However, it should not be construed that the scope of the subject matter of the present invention is limited to the following embodiments. Any modifications, substitutions and alterations made based on ordinary technical knowledge and conventional means in the art without departing from the above-described technical concept of the present invention are included within the scope of the present invention.

[0020] This invention enables the taper machining of the blind hole end of a deep hole, achieving a self-positioning effect during the machining process.

[0021] Reference Figure 1 This invention primarily adds a self-positioning section 3 to a deep hole taper tool. This self-positioning section 3 employs a slotted, non-sharpened method, with the two middle sections using a six-flute configuration. Due to the tool's long length and insufficient rigidity, its main function is chip removal and positioning. The front-end sharpened section 3 is tapered, with a length of 9.5mm and a taper of 9°. The straight section 4 connected to the sharpened section 3 also uses a slotted, non-sharpened method to prevent tool wobble during taper hole machining, which can easily lead to out-of-tolerance diameter issues in the straight section connected to the taper hole due to the large cutting force on the tapered surface. The application of this tool ultimately ensures the machining accuracy of taper deep blind holes while avoiding damage to the straight section of the hole. Simultaneously, it provides a reference for promoting the development of root taper machining in deep hole processing.

[0022] Example 1: The tool design mainly consists of: a smooth section 2 with a diameter of Φ11.9mm, and two 30mm long self-positioning sections 3. Each self-positioning section 3 is a 6-flute positioning post with a slotted, unsharpened structure and a diameter of Φ12mm. The self-positioning section 3 is connected to a sharpened section 5 via a straight section 4. The sharpened section 5 has a tapered structure with a taper of 9°. The tool holder connecting section 1 has a diameter of Φ12mm. The tool structure adopts an integral design method to achieve self-positioning machining of deep hole blind hole tapers.

[0023] The tool holder connecting section 1 is clamped onto the tool holder. After the tapered part of the cutting edge section 5 enters the hole, the self-positioning section 3 of the 6-edge positioning post and the straight section 4 of the slotted and uncut part only achieve hole self-positioning and do not participate in hole machining. The rear end light rod section 2 is used for guidance. Then the tool extends into the bottom of the deep hole and blind hole and performs tapering machining.

[0024] The self-positioning tapered reamer for deep hole machining provided by this utility model has been described in detail above. Specific examples have been used to illustrate the structure and working principle of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the scope of protection of the claims of this utility model.

Claims

1. A self-positioning tapered reamer for deep hole machining, characterized in that: Includes a smooth rod section (2), and a number of self-positioning sections (3) are provided in the part of the smooth rod section (2) near the sharpened section (5). A straight section (4) is also provided at the connection between the sharpened section (5) and the smooth rod section (2). Both the self-positioning section (3) and the straight section (4) are slotted, non-sharpened structures.

2. The deep hole machining self-positioning tapered reamer according to claim 1, characterized in that: The self-positioning section (3) is a 6-blade slotted but not bladed structure, and its outer diameter is larger than that of the smooth rod section (2).

3. The deep hole machining self-positioning tapered reamer according to claim 1, characterized in that: The optical rod section (2) is provided with two self-positioning sections (3).

4. The self-positioning tapered reamer for deep hole machining according to claim 1, characterized in that: The blade section (5) is tapered with a taper of 9°.

5. The deep hole machining self-positioning tapered reamer according to claim 1, characterized in that: The other end of the polished rod section (2) is provided with a handle connecting section (1).

6. The self-positioning tapered reamer for deep hole machining according to claim 5, characterized in that: The handle connecting section (1), smooth rod section (2), self-positioning section (3), straight section (4) and sharpening section (5) are integrated into a single structure.

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