A type of milling cutter

Abstract

This application relates to a milling cutter, used in the field of cutting tools, including a cutter head. The cutter head has several placement slots, and each of the slots contains a cutting insert that matches the slot. Each cutting insert has a cutting portion, and the bottom of each slot has a protrusion. Each cutting insert has a positioning groove that matches the protrusion, and the protrusion is inserted into the positioning groove. Each of the cutting inserts has a fixing component that secures the insert to the cutter head. The technical advantages of this application are: the positioning groove limits the position of the protrusion, reducing the possibility of relative displacement between the cutting insert and the protrusion on the cutter head, thereby reducing the possibility of cutting insert position deviation during machining, improving the stability of the cutting insert mounted on the cutter head, and thus optimizing the overall machining effect and efficiency of the milling cutter.

Description

Technical Field

[0001] This application relates to the field of cutting tool technology, and in particular to a milling cutter. Background Technology

[0002] A milling cutter is a rotating cutting tool with one or more cutting teeth used for milling operations. During operation, each cutting tooth intermittently removes the excess material from the workpiece.

[0003] In related technologies, milling cutters include a cutter head, on which several cutting inserts are arranged in a circumferential array on the end face. These inserts are directly threaded onto the end face of the cutter head by screws. During use, the machining equipment drives the cutter head to rotate, causing the inserts on the cutter head to perform chip cutting on the workpiece.

[0004] During use, several inserts of the aforementioned milling cutter are directly mounted on the end face of the cutter head. When the inserts are machining on the cutter head, their positions are prone to shift, resulting in unstable insert positions that affect the overall machining effect and efficiency of the milling cutter. Summary of the Invention

[0005] To address the problem in related technologies where milling cutters have multiple inserts directly mounted on the end face of the cutter head, leading to positional misalignment and instability during machining, thus affecting overall machining performance and efficiency, this application provides a milling cutter with the following technical solution: It includes a cutter head with multiple placement slots. Inserts matching the placement slots are placed in each slot. Each insert has a cutting portion. A protrusion is provided at the bottom of each placement slot. A positioning groove matching the protrusion is provided on each insert, and the protrusion is inserted into the positioning groove. Each insert has a fixing component for securing it to the cutter head.

[0006] In one specific implementation, the fixing component includes a mounting screw passing through the blade, the protrusion having a threaded groove that matches the mounting screw, and the mounting screw being threaded into the threaded groove.

[0007] In one specific implementation, the mounting screw is a fine-thread screw.

[0008] In one specific implementation, the cutting portion is provided with a front angle.

[0009] In one specific implementation, the cutting portion is provided with double rear angles.

[0010] In one specific implementation, the cutting part is provided with a helical cross-blade.

[0011] In one specific implementation, several blades are arranged along the circumference of the cutter head, and the angles between adjacent blades are not equal.

[0012] In one specific implementation scheme, the cutter head is provided with a mounting hole, and the wall of the mounting hole is provided with a plurality of drive keyways.

[0013] In one specific implementation, chip guide grooves are formed on several of the blades.

[0014] In one specific implementation, a retrieval slot is provided on the wall of the placement slot.

[0015] In summary, this application has the following beneficial technical effects: the positioning groove limits the position of the protrusion, reduces the possibility of relative displacement between the cutting tool and the protrusion on the cutter head, thereby reducing the offset of the cutting tool position during machining, improving the stability of the cutting tool mounted on the cutter head, and thus optimizing the overall machining effect and machining efficiency of the milling cutter. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0017] Figure 2 This is a schematic diagram illustrating the structure of the protrusion in the embodiments of this application.

[0018] Figure 3 This is a schematic diagram illustrating the structure of the spiral cross blade in the embodiments of this application.

[0019] Reference numerals: 1. Cutter head; 2. Placement slot; 3. Blade; 4. Protrusion; 5. Threaded groove; 6. Front angle; 7. Double clearance angle; 8. Helical cross blade; 9. Mounting hole; 10. Drive keyway; 11. Chip guide groove; 12. Pick-up groove. Detailed Implementation

[0020] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0021] This application discloses a milling cutter.

[0022] Reference Figure 1 and Figure 2 The milling cutter includes a cutter head 1, which has mounting holes 9 for connecting to machining equipment. Several drive keyways 10 are formed on the wall of the mounting holes 9. In this embodiment, the number of drive keyways 10 is set to two, and the two drive keyways 10 are asymmetrically arranged, with an included angle of 165° between their center lines. Therefore, when two cutter heads 1 need to be combined for machining, the cutter head 1 can be connected to the machining equipment via the drive keyways 10 at different positions, achieving staggered tooth installation during combined machining. This effectively reduces the instantaneous cutting force during machining and improves the machining stability and part quality of the cutter head 1.

[0023] Reference Figure 1 and Figure 2 The cutter head 1 has several placement slots 2, and each placement slot 2 contains a blade 3 that matches the size of the placement slot 2. In this embodiment, the number of placement slots 2 located on the same end face of the cutter head 1 is set to six. The slot walls of the placement slots 2 are provided with retrieval slots 12, which facilitates the operator to retrieve the blade 3 from the placement slots 2. The six blades 3 located on the same end face of the cutter head 1 are arranged along the circumference of the cutter head 1, and the angles between adjacent blades 3 are not equal, that is, the angle between the center of adjacent blades 3 and the center of the cutter head 1 is not equal. Preferably, in this embodiment, the angles are 62°, 58°, 64°, 57°, 63°, and 56°, respectively. The unequal tooth angle design in this embodiment can effectively reduce the resonance between the cutter head 1 and the part during processing and improve the stability of the cutter head 1 during processing.

[0024] Reference Figure 1 and Figure 2 A protrusion 4 is fixedly connected to the bottom of the slot 2. The sharp edge of the protrusion 4 has a rounded chamfer. The cutting blade 3 has a positioning groove matching the size of the protrusion 4, and the protrusion 4 is inserted into the positioning groove. Each cutting blade 3 is equipped with a fixing component to secure it to the cutter head 1. Therefore, the positioning groove limits the position of the protrusion 4, reducing the possibility of relative displacement between the cutting blade 3 and the protrusion 4 on the cutter head 1. This reduces the possibility of the cutting blade 3 shifting position during machining, improves the stability of the cutting blade 3 mounted on the cutter head 1, and thus optimizes the overall machining effect and efficiency of the milling cutter.

[0025] Reference Figure 1 and Figure 2 The fixing component includes a mounting screw passing through the blade 3. A threaded groove 5 matching the size of the mounting screw is formed on the protrusion 4, and the mounting screw is threaded into the threaded groove 5. In this embodiment, the mounting screw is a fine-pitch screw. Fine-pitch screws have tighter threads and a smaller distance between adjacent thread crests, which allows them to provide greater tightening force after tightening, thereby enhancing the stability of the connection between the cutter head 1 and the blade 3. Under vibration or impact environments, fine-pitch screws exhibit superior self-locking performance due to their smaller pitch and thread helix angle, making them less prone to loosening.

[0026] Therefore, the operator can connect the blade 3 to the cutter head 1 by screw installation and removal. Since the cutter head 1 is relatively thin, the contact length of the thread can be increased when the mounting screw is tightened by the protrusion 4. At the same time, the fine thread is used to further increase the tightening force when the mounting screw is tightened.

[0027] Reference Figure 2 and Figure 3The insert 3 is equipped with a cutting section, which has a rake angle 6, a double clearance angle 7, and a helical chisel edge 8. In this embodiment, one insert 3 can have four cutting sections. When the cutting section used for machining becomes worn after long-term use, the insert 3 can be rotated to adjust its position and replace it with an unworn insert 3 for machining. This application adopts a special cutting edge design for the insert 3, which ensures that the insert 3 has a relatively sharp rake angle 6 while using a double clearance angle 7, thus ensuring both the sharpness and strength of the cutting edge. The form of the rake angle 6 on the cutter head 1 can effectively control the direction of chip removal, reducing the possibility of chips scratching the workpiece. In this embodiment, the entire chisel edge is helical, which can effectively reduce instantaneous cutting resistance and improve the stability of the tool during intermittent cutting.

[0028] Reference Figure 2 and Figure 3 Each cutting tool 3 has a chip guide groove 11, which guides the chips and facilitates their removal after machining. In this embodiment, instead of using the full-circle turning method found in related technologies, the excess cutting material is individually removed from the machining center along the circumference of each cutting tool 3 to form the chip guide groove 11. This ensures maximum rigidity of the cutting tool 3 while providing sufficient space for the cutting material to accommodate the chips, reducing the possibility of chips getting stuck between the cutting material and the workpiece.

[0029] Furthermore, in this embodiment, both the front and back end faces of the cutter head 1 can be used as mounting surfaces to install the cutting blades 3. The six cutting blades 3 on the front side and the six cutting blades 3 on the back side are staggered, thereby enabling the cutting blade head 1 to process the workpiece on both the front and back end faces, further improving the processing efficiency of the milling cutter.

[0030] The implementation principle of this application embodiment is as follows: the positioning groove limits the position of the protrusion 4, reduces the possibility of relative displacement between the blade 3 and the protrusion 4 on the cutter head 1, thereby reducing the positional deviation of the blade 3 during processing, improving the stability of the blade 3 mounted on the cutter head 1, and thus optimizing the overall processing effect and processing efficiency of the milling cutter.

[0031] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A milling cutter characterized by: The tool includes a cutting disc (1), which has several placement slots (2). Each of the several placement slots (2) has a blade (3) that matches the placement slot (2). Each blade (3) has a cutting part. The bottom of each placement slot (2) has a protrusion (4). Each blade (3) has a positioning slot that matches the protrusion (4). The protrusion (4) is inserted into the positioning slot. Each of the several blades (3) has a fixing component that fixes the blade (3) to the cutting disc (1).

2. The milling cutter according to claim 1, characterized in that: The fixing component includes a mounting screw that passes through the blade (3), and the protrusion (4) has a threaded groove (5) that matches the mounting screw. The mounting screw is threaded into the threaded groove (5).

3. The milling cutter according to claim 2, characterized in that: The mounting screws are fine-thread screws.

4. The milling cutter of claim 1, wherein: The cutting part is provided with a front angle (6).

5. The milling cutter according to claim 1, characterized in that: The cutting part is provided with double rear angles (7).

6. The milling cutter according to claim 1, characterized in that: The cutting part is provided with a helical cross-blade (8).

7. The milling cutter according to claim 1, characterized in that: Several blades (3) are arranged along the circumference of the cutter head (1) and the angles between adjacent blades (3) are not equal.

8. The milling cutter of claim 1, wherein: The cutter head (1) has a mounting hole (9), and the wall of the mounting hole (9) has a plurality of drive keyways (10).

9. The milling cutter of claim 1, wherein: Each of the blades (3) has a chip guide groove (11).

10. The milling cutter according to claim 1, characterized in that: The placement groove (2) has a retrieval groove (12) on its groove wall.

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