Three-edge milling cutter with replaceable cutter point

Abstract

The utility model belongs to the technical field of milling cutters, and particularly relates to a three-edge milling cutter with a replaceable cutter tip, which aims at solving the problem that the existing cutter tip is not easy to replace, and adopts the following scheme that the three-edge milling cutter comprises a cutter bar, and a dismounting mechanism is arranged below the cutter bar; the dismounting mechanism comprises a limiting block, the limiting block is fixedly installed at the bottom end of the cutter bar, a limiting groove is formed in one side of the limiting block, and an insertion block penetrates out of the limiting groove. Firstly, the limiting block and the limiting groove at the bottom end of the cutter bar and the insertion block and the abutting groove at the top end of the cutter point are mutually spliced and limited; then a sleeve is arranged at the splicing position in a sleeving mode and is in threaded connection with the limiting block and the inserting block at the same time, the tool bar and the tool nose can be rapidly spliced, the tool nose can be replaced, waste caused by overall replacement is avoided, the abutting block abuts against the inserting block from the lower portion, the splicing stability is further improved, and the limiting block and the inserting block abut against each other; and the torque force when the tool bar drives the tool nose to rotate can be kept.

Description

Technical Field

[0001] This utility model relates to a three-flute end mill, specifically a three-flute end mill with interchangeable cutting tips, belonging to the field of end mill technology. Background Technology

[0002] Three-flute end mills are a common type of machine tool cutter. They are installed on machine tools such as milling machines. The cutter rotates, and the workpiece feeds relative to the cutter. The cutting edge contacts the workpiece and removes material through cutting force to form the required shape and size. The three cutting edges cut simultaneously, resulting in a fast feed rate and higher machining efficiency than single-flute or double-flute end mills.

[0003] In the prior art, such as the three-flute end mill disclosed in CN221435065U, by setting three unequal end cutting edges and unequal cutting grooves, the resonance problem generated during end milling can be effectively solved, which can greatly improve the processing efficiency and extend the service life of the tool.

[0004] However, in implementing the relevant technology, the following problems were found in the design of the three-flute end mill: In the prior art, the processing efficiency can be improved by the cooperation of components such as the end cutting edge and the cutting groove. However, in actual use, the end mill is prone to wear on the cutting tip during the drilling process, and it needs to be replaced regularly. However, in general, the cutting bar and cutting tip are integrated, and the whole thing needs to be replaced, which will result in waste of resources and increased costs. In view of this, a three-flute end mill with a replaceable cutting tip is provided to overcome the above defects. Utility Model Content

[0005] This invention addresses the problem of wear on the cutting tip during the drilling process of milling cutters, which necessitates periodic replacement. However, since the cutting shank and tip are typically integrated, requiring complete replacement, this leads to resource waste and increased costs. Therefore, this invention provides a three-flute milling cutter with a replaceable cutting tip.

[0006] The present invention achieves the above objectives through the following technical solution: a three-flute end mill with interchangeable cutting tips, including a tool holder, wherein a disassembly and assembly mechanism is provided below the tool holder;

[0007] The disassembly and assembly mechanism includes a limiting block, which is fixedly installed at the bottom end of the blade bar. A limiting groove is provided on one side of the limiting block, and an insertion block extends through the limiting groove. An abutment groove is provided on one side of the insertion block, and a blade tip is fixedly installed at the bottom end of the limiting block.

[0008] As a further improvement of this utility model: a sleeve is fitted around the outside of the limiting block, and an abutment block is fixedly installed at the bottom inside the sleeve.

[0009] As a further embodiment of this utility model: the sleeve is threadedly connected to the limiting block, and the sleeve is also threadedly connected to the insertion block.

[0010] As a further improvement of this utility model: a fixing ring is fixedly installed on the outside of the sleeve, and a reinforcement mechanism is provided on the outside of the fixing ring.

[0011] As a further embodiment of this utility model: the reinforcing mechanism includes a sleeve ring, which is slidably connected to the outside of the tool bar, and the outer wall of the sleeve ring is provided with a mounting groove.

[0012] As a further improvement of this utility model: a rotating plate extends through the interior of the placement groove, and a support rod extends through the end of the rotating plate that enters the placement groove.

[0013] As a further embodiment of this utility model: a locking block is fixedly installed at the bottom end of the rotating plate, and a fastening ring is slidably connected to the outside of the rotating plate. A slot is provided on the outer wall of the fixing ring corresponding to the position of the rotating plate.

[0014] The beneficial effects of this utility model are as follows: First, the limiting block and limiting groove at the bottom of the tool bar are spliced ​​together with the insertion block and abutting groove at the top of the tool tip and limited. Then, a sleeve is fitted at the splicing position and threadedly connected to the limiting block and the insertion block. This allows the tool bar and the tool tip to be quickly assembled and the tool tip can be replaced, avoiding the waste of replacing the whole. The abutting block abuts against the insertion block from below, which further improves the stability of the assembly. And through the mutual abutment of the limiting block and the insertion block, the torque force when the tool bar drives the tool tip to rotate can be maintained.

[0015] After initial fixation by the sleeve, the position of the sleeve ring is adjusted, and the rotating plate is rotated in the mounting groove via the support rod, so that it can pass into the slot and allow the locking block to abut against the fixing ring. At the same time, the four rotating plates are externally threaded to the same fastening ring, which can improve the stability of the tool bar and tool tip after assembly by abutting against the fixing ring, and further improve the stability by limiting and pressing through the fastening ring. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the contact groove structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the contact block structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the support rod structure of this utility model.

[0020] In the diagram: 1. Tool holder; 2. Assembly / disassembly mechanism; 201. Limiting block; 202. Limiting groove; 203. Insertion block; 204. Contact groove; 205. Tool tip; 206. Sleeve; 207. Contact block; 3. Fixing ring; 4. Reinforcing mechanism; 401. Sleeve ring; 402. Placement groove; 403. Rotating plate; 404. Support rod; 405. Slot; 406. Locking block; 407. Fastening ring. Detailed Implementation

[0021] 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. Example 1

[0022] like Figures 1 to 4 As shown, a three-flute end mill with interchangeable cutting tips includes a tool holder 1, and a disassembly / assembly mechanism 2 is provided below the tool holder 1. The disassembly / assembly mechanism 2 includes a limiting block 201, which is fixedly installed at the bottom end of the tool holder 1. A limiting groove 202 is provided on one side of the limiting block 201, and an insertion block 203 extends through the limiting groove 202. An abutment groove 204 is provided on one side of the insertion block 203. A cutting tip 205 is fixedly installed at the bottom end of the limiting block 201. A sleeve 206 is sleeved on the outside of the limiting block 201, and an abutment block 207 is fixedly installed at the bottom end of the sleeve 206. The sleeve 206 is threadedly connected to the limiting block 201, and the sleeve 206 is connected to the insertion block 207. 03 Threaded connection; First, the limiting block 201 and limiting groove 202 at the bottom of the tool bar 1 are spliced ​​with the insertion block 203 and abutment groove 204 at the top of the tool tip 205 and limited. Then, a sleeve 206 is fitted at the splicing position and threadedly connected to the limiting block 201 and insertion block 203. This allows the tool bar 1 and tool tip 205 to be quickly assembled and the tool tip 205 can be replaced, avoiding the waste of replacing the whole. The abutment block 207 abuts against the insertion block 203 from below to further improve the stability of the assembly. The mutual abutment of the limiting block 201 and insertion block 203 can maintain the torque force when the tool bar 1 drives the tool tip 205 to rotate. Example 2

[0023] In addition to all the technical features in Embodiment 1, this embodiment also includes: a fixing ring 3 fixedly installed on the outside of the sleeve 206; a reinforcing mechanism 4 provided on the outside of the fixing ring 3; the reinforcing mechanism 4 includes a sleeve ring 401, which is slidably connected to the outside of the tool holder 1; a mounting groove 402 is formed on the outer wall of the sleeve ring 401; a rotating plate 403 extends through the inside of the mounting groove 402; a support rod 404 extends through the end of the rotating plate 403 that enters the mounting groove 402; a locking block 406 is fixedly installed at the bottom of the rotating plate 403; and the outside of the rotating plate 403 is slidably connected to... A fastening ring 407 is attached, and a slot 405 is provided on the outer wall of the fixed ring 3 corresponding to the position of the rotating plate 403. After being initially fixed by the sleeve 206, the position of the sleeve ring 401 is adjusted, and the rotating plate 403 is rotated in the placement groove 402 via the support rod 404, so that it can pass into the slot 405 and allow the locking block 406 to abut against the fixed ring 3. At the same time, the four rotating plates 403 are externally threaded to the same fastening ring 407, which can improve the stability of the tool bar 1 and the tool tip 205 after assembly by abutting against the fixed ring 3, and further improve the stability by limiting and pressing through the fastening ring 407.

[0024] Working principle: The limiting block 201 and limiting groove 202 of the tool bar 1 are spliced ​​with the insertion block 203 and abutment groove 204 of the tool tip 205 and can mutually limit each other, maintaining torque force during rotation. Then, the sleeve 206 is sleeved on the outside of the limiting block 201 and insertion block 203 and threadedly connected, which allows the tool bar 1 and the tool tip 205 to be quickly assembled and disassembled. The sleeve 206 abuts against the insertion block 203 from below through the fixed abutment block 207, further improving the assembly stability of the tool bar 1 and the tool tip 205. By adjusting the connection with the tool bar 1... The position of the threaded connection sleeve ring 401 allows the rotating plate 403 to rotate and adjust its angle within the mounting groove 402 via the support rod 404, enabling it to pass through the slot 405 of the fixing ring 3 and be abutted by the locking block 406. Simultaneously, a fastening ring 407 is fitted around the rotating plate 403 and threadedly connected, further enhancing the fastening effect of the rotating plate 403 and the locking block 406 on the fixing ring 3. This improves the stability and firmness of the tool holder 1 and the tool tip 205 after assembly, preventing loosening and shaking during the rotation process.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0026] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A three-cutter replaceable tip milling cutter comprising a cutter bar (1), characterised in that: The lower part of the cutter bar (1) is provided with a dismounting mechanism (2); The dismounting mechanism (2) comprises a limiting block (201), the limiting block (201) is fixedly installed at the bottom end of the cutter bar (1), one side of the limiting block (201) is provided with a limiting groove (202), the limiting groove (202) is provided with an insertion block (203) penetrating through the inside of the limiting groove (202), one side of the insertion block (203) is provided with an abutting groove (204), and the bottom end of the limiting block (201) is fixedly installed with a cutter tip (205).

2. A three-cutter replaceable tip milling cutter according to claim 1, characterized in that: The outside of the limiting block (201) is sleeved with a sleeve (206), and the inside bottom end of the sleeve (206) is fixedly installed with an abutting block (207).

3. A three-cutter replaceable tip milling cutter according to claim 2, wherein: The sleeve (206) is in threaded connection with the limiting block (201), and the sleeve (206) is in threaded connection with the insertion block (203).

4. A three-cutter replaceable tip milling cutter according to claim 2, wherein: The outside of the sleeve (206) is fixedly installed with a fixing ring (3), and the outside of the fixing ring (3) is provided with a reinforcing mechanism (4).

5. A three-cutter replaceable tip milling cutter according to claim 4, wherein: The reinforcing mechanism (4) comprises a sleeving ring (401), the sleeving ring (401) is in sliding connection on the outside of the cutter bar (1), and the outer wall of the sleeving ring (401) is provided with a placing groove (402).

6. A three-cutter replaceable tip milling cutter according to claim 5 wherein: The inside of the placing groove (402) is provided with a rotating plate (403), and the inside of one end of the rotating plate (403) penetrating into the placing groove (402) is provided with a supporting rod (404).

7. A three-cutter replaceable tip milling cutter according to claim 6, wherein: The bottom end of the rotating plate (403) is fixedly installed with a clamping block (406), and the outside of the rotating plate (403) is in sliding connection with a fastening ring (407), and the outer wall of the fixing ring (3) is provided with a clamping groove (405) corresponding to the position of the rotating plate (403).

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