High-performance blade-replaceable hole machining tool
By designing a replaceable insert hole machining tool, the problems of insufficient hardness and rigidity of carbide tools and high cost of solid carbide drill bits were solved, achieving high-precision, low-cost hole machining and improving machining efficiency.
Patent Information
- Application Number
- CN202520192484.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-07
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-02-07
AI Technical Summary
Existing carbide cutting tools have insufficient hardness and rigidity when machining stainless steel holes, leading to problems such as core extrusion, scraping, and center runout. In addition, solid carbide drills are expensive, and drills with drillable tips have low precision and require secondary processing.
Design a high-performance interchangeable insert hole machining tool, including a tool holder, connecting bolt, transition section, chip removal section and cutting insert. The interchangeability of the insert is achieved by threaded connection, and the drill tip angle and chip removal groove design are optimized to improve rigidity and machining accuracy.
While ensuring high precision, costs are reduced by changing different cutting tools to adapt to different hole diameter requirements, thereby reducing the frequency of regrinding and improving processing efficiency.
Smart Images
Figure CN223889000U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of metal cutting tools, specifically a high-performance replaceable insert hole machining tool. Background Technology
[0002] Machining stainless steel places certain demands on cutting tools. For hole machining, the high hardness of stainless steel requires significant cutting forces, necessitating specific requirements for the hardness and rigidity of the cutting tools. Traditional twist drills, due to design limitations, even with the exception of high-speed steel tools (which have lower hardness and rigidity than carbide tools), still suffer from drawbacks such as core compression and scraping of the workpiece, and a tendency for center runout during machining. They fail to fully utilize the advantages of high hardness, high rigidity, and low cutting forces inherent in carbide. Currently available carbide cutting tools include solid carbide drills, which offer advantages such as high machining accuracy, the ability to complete machining in a single pass, and high feed rates. However, they suffer from drawbacks such as the need for multiple hole diameters, high tool costs leading to high per-hole costs, and the need for regrinding or even tool scrapping after a certain period of use due to the cutting edge becoming dull. Drill bits with drillable cutting heads are versatile and can cover a certain range of hole diameter requirements. They are low in cost and suitable for machining multi-hole parts, reducing the time spent changing drill bits and improving machining efficiency. However, the disadvantage is that the drilling accuracy is relatively low, often requiring secondary machining of the hole. Therefore, there is an urgent need for a device to solve the above problems. Summary of the Invention
[0003] The purpose of this invention is to provide a high-performance replaceable insert hole machining tool to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a high-performance replaceable insert hole machining tool, including a tool holder, a connecting bolt fixedly embedded inside the tool holder, a transition portion provided on the outside of the connecting bolt by threaded connection, a chip removal portion integrally formed on one side of the transition portion, a cutting insert portion integrally formed on one side of the chip removal portion, a heat dissipation hole opened on the chip removal portion to reduce the machining temperature, a drill core located on the right side of the cutting insert portion, and a plurality of chip removal grooves evenly opened on the outside of the chip removal portion.
[0005] Preferably, there are two heat dissipation holes, which are symmetrically located on both sides of the chip removal section.
[0006] Preferably, the chip removal groove is designed with a small helix angle b of 15°-25°, which improves chip removal and rigidity.
[0007] Preferably, the drill bit has a drill tip angle α of 130°-145° on the right side. A larger drill tip angle results in less radial force during machining, which can reduce tool runout during drilling.
[0008] Preferably, the mating surface angle c at the connection between the cutting blade portion and the chip removal portion is 140°-155°.
[0009] Compared with the prior art, the beneficial effects of this utility model are:
[0010] This invention mounts the transition part to the outside of the tool holder via connecting bolts, allowing for the replacement of cutting inserts. This not only ensures high machining accuracy but also reduces costs by allowing different inserts to be replaced on the same tool body as needed. Furthermore, direct insert replacement minimizes the reduction in accuracy after re-grinding the cutting edge. By changing different inserts according to different hole diameters during machining, the time spent removing the tool from machine tools and other equipment can be reduced, thus improving machining efficiency. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the overall structure of a high-performance replaceable insert hole machining tool according to the present invention;
[0012] Figure 2 This is a schematic diagram of the heat dissipation hole opening of a high-performance replaceable insert hole machining tool according to the present invention;
[0013] Figure 3 This is a side view of the cutting insert portion of a high-performance replaceable insert hole machining tool according to this utility model.
[0014] In the diagram: 1. Tool holder; 2. Transition section; 3. Chip removal section; 4. Cutting insert section; 5. Connecting bolt; 6. Heat dissipation hole; 7. Drill core; 8. Chip removal groove. Detailed Implementation
[0015] 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.
[0016] Please see Figure 1-3This utility model provides a high-performance replaceable insert hole machining tool, including a tool holder 1. A connecting bolt 5 is embedded and fixed inside the tool holder 1. A transition portion 2 is provided on the outside of the connecting bolt 5 through a threaded sleeve. A chip removal portion 3 is integrally formed on one side of the transition portion 2. A cutting insert portion 4 is integrally formed on one side of the chip removal portion 3. A heat dissipation hole 6 is opened on the chip removal portion 3 to reduce the machining temperature. Two heat dissipation holes 6 are opened symmetrically on both sides of the chip removal portion 3. A drill core 7 is located on the right side of the cutting insert portion 4. Several chip removal grooves 8 are evenly opened on the outside of the chip removal portion 3. The chip removal grooves 8 adopt a small helix angle b of 15°-25° for better chip removal and better rigidity. The drill core 7 has a drill tip angle a of 130°-145° on the right side. The larger drill tip angle results in less radial force during machining, which can reduce tool runout during drilling. The mating surface angle c at the connection between the cutting insert portion 4 and the chip removal portion 3 is 140°-155°.
[0017] Working principle: The transition part 2 is installed on the outside of the tool holder 1 by connecting bolts 5. This allows for the replacement of cutting inserts and drill bits. While maintaining high machining accuracy, different cutting inserts can be replaced on the same tool body as needed to reduce costs. Direct replacement of cutting inserts also minimizes the reduction in accuracy after re-grinding the cutting edge. During machining, different cutting inserts can be replaced according to different hole diameters, which can reduce the time spent removing the tool from machine tools and other equipment and improve machining efficiency.
[0018] It should be noted that, in this document, relational terms such as "first" and "second" are used only 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 process, method, article, or apparatus.
[0019] 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 high-performance replaceable insert hole machining tool, comprising a tool holder (1), a chip removal part (3), a cutting insert part (4), a heat dissipation hole (6), and a drill core (7), characterized in that: The tool holder (1) is inlaid with a connecting bolt (5), and the connecting bolt (5) is threaded to the outside of a transition part (2). The chip removal part (3) is integrally formed on one side of the transition part (2), and the cutting blade part (4) is integrally formed on one side of the chip removal part (3). The heat dissipation hole (6) is opened on the chip removal part (3), and the drill core (7) is located on the right side of the cutting blade part (4). Several chip removal grooves (8) are evenly opened on the outside of the chip removal part (3).
2. The high-performance replaceable insert hole machining tool according to claim 1, characterized in that: Two heat dissipation holes (6) are provided, symmetrically located on both sides of the chip removal part (3).
3. The high-performance replaceable insert hole machining tool according to claim 2, characterized in that: The chip removal groove (8) is designed with a small helix angle b of 15°-25°.
4. The high-performance replaceable insert hole machining tool according to claim 3, characterized in that: The drill bit (7) has a drill tip angle of 130°-145° on the right side.
5. A high-performance replaceable insert hole machining tool according to claim 4, characterized in that: The angle c of the mating surface at the connection between the cutting blade part (4) and the chip removal part (3) is 140°-155°.