Wedge block type indexable milling cutter head structure

Abstract

The utility model discloses a wedge block type indexable milling cutterhead structure which comprises a plurality of cutter grain placing grooves, milling cutter grains are arranged in the grooves, and the cutter grains are pressed through pressing placing grooves and cutter grain pressing blocks made of elastic materials. Threaded connecting grooves are formed in the pressing containing grooves, and the pressing force can be adjusted through the threaded connecting grooves by tightening bolts. And when the bolt is gradually tightened, the cutter grain pressing block generates elastic deformation and uniformly applies pressure to the milling cutter grains, so that the cutter grains are ensured to be stably fixed on the cutter head. The shape of the cutter blade pressing block is matched with that of the pressing placing groove, and the cutter blade pressing block is provided with an inclined plane. By means of accurate contact design, the stability of the cutter blade is effectively improved, and the service life of the cutter blade is effectively prolonged.

Description

Technical Field

[0001] This utility model relates to the field of milling technology, and in particular to a wedge-type indexable milling cutter head structure. Background Technology

[0002] In modern machining, milling cutters are widely used in various cutting operations, especially in the metal processing industry where they play a crucial role. The design of the milling cutter directly affects machining efficiency and tool life. Traditional milling cutters typically use a fixed mounting method, with the milling inserts directly mounted on the cutter head and secured by bolts or other fastening devices. However, during long-term cutting operations, factors such as cutting forces, temperature changes, and vibrations can cause the connection between the inserts and the cutter head to loosen, affecting cutting performance and even causing inserts to fall off. This not only impacts machining accuracy but also reduces tool life and increases production costs.

[0003] To improve the stability of milling inserts, some milling cutter heads employ clamping devices to enhance the bond between the inserts and the cutter head. For example, some milling cutter heads are designed with adjustable clamping blocks, which apply pressure to the inserts using an elastic material, thereby preventing the inserts from loosening. However, existing clamping devices still have some shortcomings: on the one hand, adjusting the clamping force is relatively complex and cannot be adjusted in real time during cutting; on the other hand, the shape of the clamping blocks in traditional designs is poorly adapted to the cutter head, easily leading to uneven force on the inserts, affecting their stability and service life.

[0004] Therefore, how to design a milling cutter head structure that can effectively improve the bonding force between the milling insert and the cutter head, prevent the insert from loosening, and accurately adjust the clamping force has become an urgent problem to be solved in current technology. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a wedge-type indexable milling cutter head structure to improve the clamping structure of the milling cutter bits and enhance the stability and long service life of the milling cutter bits.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a wedge-type indexable milling cutter head structure, including a milling cutter head, wherein the milling cutter head has multiple tool placement slots, and milling tools are placed in the tool placement slots. The milling cutter head also has a clamping placement slot, and a tool clamping block made of elastic material is placed in the clamping placement slot. The shape of the tool clamping block is adapted to the shape of the clamping placement slot. A threaded connection slot is also provided on the inner side of the clamping placement slot. A tightening bolt is provided through the tool clamping block. The tightening bolt is threaded into the threaded connection slot. The tightening bolt is inclined toward the side of the milling tool.

[0007] The cutting tool clamping block is inclined to one side of the milling tool to form an inclined surface. The inclined surface includes a first inclined surface, a second inclined surface, and a third inclined surface connected in sequence. The second inclined surface is closest to the milling tool. The intersection of the first inclined surface and the second inclined surface forms an intersecting connecting line. The intersecting connecting line is inclined towards the milling tool. The intersecting connecting line is provided with a nearest contact point, which is the point on the intersecting connecting line that is closest to the milling tool.

[0008] As the tightening bolt is gradually tightened in the threaded groove, the cutting tool clamping block undergoes elastic deformation toward the side of the milling tool, and the nearest contact point, the intersecting connecting line, and the second inclined surface sequentially contact the milling tool until the milling tool is clamped.

[0009] Furthermore, the tightening bolt is provided with a self-locking washer. When the tightening bolt is threadedly connected to the threaded connection groove, the self-locking washer locks the tightening bolt and the threaded connection groove in the opposite direction.

[0010] Furthermore, both the inner surface of the threaded connection groove and the outer surface of the tightening bolt are provided with an anti-corrosion coating.

[0011] Furthermore, the second inclined surface of the cutting tool clamping block that contacts the milling tool is an arc-shaped curved surface.

[0012] Furthermore, the surfaces of the milling cutter head and the tool placement groove are provided with an anti-stick coating.

[0013] Furthermore, the outer edge of the milling cutter head is provided with a plurality of chip removal holes, which are connected to the clamping and placing groove.

[0014] Furthermore, the outer edge of the milling cutter head is provided with a plurality of airflow guiding grooves, the airflow guiding grooves are inclined toward the rotation direction of the milling cutter head during operation, and the airflow guiding grooves are connected to the chip removal hole.

[0015] The beneficial effects of this utility model are:

[0016] 1. Improve the uniformity of clamping force: The inclined surface design of the cutting tool clamping block allows the clamping force to be evenly distributed on the surface of the milling tool, effectively avoiding damage or uneven wear of the cutting tool due to uneven pressure, and improving the service life of the milling tool.

[0017] 2. Improved tool life: Because the tool clamping block applies uniform and stable pressure to the milling tool, the risk of the milling tool loosening or falling off is reduced, thereby extending the overall service life of the milling cutter head and reducing production costs.

[0018] 3. Adjustable clamping force: The clamping force can be adjusted by tightening the bolts, so that the bonding force between the milling insert and the milling cutter head can be precisely adjusted according to actual needs, ensuring the best insert fixing effect, and can be optimized according to different cutting conditions.

[0019] 4. Improve the stability of the cutting insert: By setting up a clamping groove and a cutting insert clamping block, it is possible to effectively prevent the cutting insert from loosening due to vibration, cutting force and other factors during long-term cutting, so as to ensure the stable fixation of the cutting insert and improve cutting accuracy and machining quality. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the wedge-type indexable milling cutter head structure in this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the blade clamping block in this utility model;

[0022] Figure 3 This is a schematic diagram of the blade placement groove and the pressing placement groove in this utility model.

[0023] Reference numerals: 1. Milling cutter head; 2. Cutter insert placement groove; 3. Cutter insert clamping block; 4. Milling insert; 5. Clamping placement groove; 6. Tightening bolt; 7. Threaded connection groove; 8. First inclined plane; 9. Second inclined plane; 10. Third inclined plane; 11. Intersecting connection line; 12. Nearest contact point; 13. Chip removal hole; 14. Airflow guide groove. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0025] Example 1, referring to Figures 1 to 3This is the first embodiment of the present invention. This embodiment provides a wedge-type indexable milling cutter head structure, which can improve the stability and long service life of the milling inserts 4. It includes a milling cutter head 1, which has multiple insert placement slots 2. Milling inserts 4 are placed in the insert placement slots 2. The milling cutter head 1 also has a clamping placement slot 5. An insert clamping block 3 made of elastic material is placed in the clamping placement slot 5. The shape of the insert clamping block 3 is adapted to the shape of the clamping placement slot 5. A threaded connection slot 7 is also provided on the inner side of the clamping placement slot 5. A tightening bolt 6 is provided through the insert clamping block 3. The tightening bolt 6 is threaded in the threaded connection slot 7. The tightening bolt 6 is inclined towards the side of the milling insert 4.

[0026] The cutting insert clamping block 3 is inclined to one side of the milling insert 4 to form an inclined surface. The inclined surface includes a first inclined surface 8, a second inclined surface 9 and a third inclined surface 10 connected in sequence. The second inclined surface 9 is closest to the milling insert 4. The intersection of the first inclined surface 8 and the second inclined surface 9 forms an intersecting connecting line 11. The intersecting connecting line 11 is inclined towards the milling insert 4. The nearest contact point 12 is provided on the intersecting connecting line 11. The nearest contact point 12 is the point on the intersecting connecting line 11 that is closest to the milling insert 4.

[0027] As the bolt 6 is gradually tightened in the threaded groove 7, the cutting tool clamping block 3 undergoes elastic deformation toward the milling tool 4. The nearest contact point 12, the intersecting connecting line 11, and the second inclined surface 9 successively contact the milling tool 4 until the milling tool 4 is clamped.

[0028] Working principle of Example 1:

[0029] First, the milling inserts 4 are installed into multiple insert placement slots 2 on the milling cutter head 1. The insert placement slots 2 are designed to accommodate inserts of different sizes to meet different machining requirements. Then, the insert clamping block 3 is placed into the clamping placement slot 5 on the milling cutter head 1. The insert clamping block 3 is made of an elastic material and has a certain elastic deformation capability, which can produce elastic deformation when subjected to pressure, thereby applying pressure to the milling inserts 4.

[0030] After installation, the operator tightens the bolts 6 located in the clamping groove 5. The bolts are connected to the cutting tool clamping block 3 via the threaded connection groove 7. When the bolts 6 are tightened, their inclined thread design causes the bolts to exert pressure towards the cutting tool side. As the bolts are gradually tightened, the cutting tool clamping block 3 undergoes elastic deformation, tilting towards the milling tool 4 side and forming a certain clamping force.

[0031] The inclined surface design of the cutting tool clamping block 3 (including the first inclined surface 8, the second inclined surface 9 and the third inclined surface 10) allows the pressure to be evenly distributed on the surface of the milling tool 4. In particular, as the tightening bolt 6 is gradually screwed in, the contact surface between the cutting tool clamping block 3 and the milling tool 4 gradually increases. In particular, the part of the second inclined surface 9 that contacts the cutting tool first forms a clamping effect, ensuring that the milling tool 4 can be evenly and firmly pressed onto the milling cutter head 1.

[0032] Throughout the cutting process, the operator can adjust the tightness of the bolts as needed, thereby changing the elastic deformation of the cutting insert clamping block 3 and achieving precise adjustment of the clamping force of the cutting insert. This design ensures that the milling insert 4 can maintain optimal fixation under different working conditions, avoiding loosening or damage of the cutting insert due to excessive or insufficient pressure.

[0033] Through this clamping design, the contact force between the milling insert 4 and the milling cutter head 1 is evenly distributed, effectively preventing problems such as loosening or falling off of the milling insert 4, and improving the stability and service life of the milling insert 4. At the same time, the shape of the insert clamping block 3 and the action of the bolts enable the milling insert 4 to withstand greater cutting forces and vibrations during the cutting process, maintaining a long-term stable working state.

[0034] In summary, this embodiment, through a precisely adjustable clamping structure, ensures the secure fixing of the milling insert 4, preventing loosening and improving the overall performance and tool life of the milling cutter head 1. This structural design is simple and easy to implement, while possessing good adaptability and adjustability, making it suitable for various complex metal processing environments.

[0035] Example 2 is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a self-locking washer, which can improve the engagement force between the bolt and the threaded groove. The tightening bolt 6 is provided with a self-locking washer. When the tightening bolt 6 is threadedly connected to the threaded connection groove 7, the self-locking washer locks the tightening bolt 6 and the threaded connection groove 7 in the opposite direction.

[0036] Working principle of Example 2:

[0037] By setting a self-locking washer on the tightening bolt 6, when the tightening bolt 6 is threadedly connected to the threaded connection groove 7, the self-locking washer locks the tightening bolt 6 and the threaded connection groove 7 in the opposite direction, which improves the biting force between the bolt and the thread groove, so that the bolt can maintain a high fastening stability during long-term use and avoid loosening due to factors such as vibration and cutting force.

[0038] Preferably, both the inner surface of the threaded connection groove 7 and the outer surface of the tightening bolt 6 are provided with an anti-corrosion coating.

[0039] Specifically, in this embodiment, the anti-corrosion coating can be formed by nitriding or nickel plating the inner surface of the threaded connection groove 7 and the outer surface of the tightening bolt 6. By providing the anti-corrosion coating, the corrosion resistance of the inner surface of the threaded connection groove 7 and the outer surface of the tightening bolt 6 can be increased. When used in high temperature or humid environments, it can effectively improve the service life of the tightening bolt 6 and the threaded connection groove 7, and reduce loosening and wear caused by environmental factors.

[0040] Preferably, the second inclined surface 9 in contact with the milling cutter 4 of the cutting tool clamping block 3 is an arc-shaped curved surface.

[0041] Specifically, in this embodiment, by setting the shape of the second inclined surface 9 as an arc-shaped curved surface, the cutting tool clamping block 3 provides a more uniform pressure distribution when it comes into contact with the milling cutting tool 4, thereby avoiding uneven force on the milling cutting tool 4 and improving the durability of the milling cutting tool 4.

[0042] Example 3 is the third embodiment of the present invention. Unlike the previous embodiment, this embodiment provides an anti-stick coating, chip removal holes 13 and airflow guiding grooves 14, which can prevent residual chips from accumulating between the milling cutter head 1 and the cutting tool clamping block 3, which would cause the cutting tool to loosen or reduce the cutting accuracy. The surfaces of the milling cutter head 1 and the cutting tool placement groove 2 are provided with an anti-stick coating.

[0043] Preferred, such as Figure 3 As shown, the outer edge of the milling cutter head 1 is also provided with multiple chip removal holes 13, which are connected to the pressing and placing groove 5.

[0044] Preferably, the outer edge of the milling cutter head 1 is provided with a plurality of airflow guiding grooves 14, the airflow guiding grooves 14 are inclined toward the rotation direction of the milling cutter head 1 during operation, and the airflow guiding grooves 14 are connected to the chip discharge hole 13.

[0045] Working principle of Example 3:

[0046] The anti-stick coating is made of materials with a low coefficient of friction, including Teflon coatings and ceramic coatings. These materials have excellent anti-stick properties, effectively reducing the adhesion of chips and impurities to the cutter head surface or groove walls. By setting the airflow guide groove 14 and chip discharge hole 13, the milling cutter head 1 rotates during operation to generate compressed air. The compressed air generates negative pressure, causing the chips in the clamping placement groove 5 and the cutting tool placement groove 2 to flow sequentially through the chip discharge hole 13 into the airflow guide groove 14, and finally out to the outside, achieving self-cleaning of the chips. This prevents chips from accumulating between the milling cutter head 1 and the cutting tool clamping block 3, which could lead to loosening of the cutting tools or reduced cutting accuracy, thus improving the durability of the milling cutter head 1.

[0047] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A structure of a wedge-type indexable milling cutter disc, comprising a milling cutter disc (1), a plurality of cutter grain placing grooves (2) are formed on the milling cutter disc (1), and a milling cutter grain (4) is arranged in the cutter grain placing groove (2), characterized in that, The milling cutter head (1) is further provided with a pressing placement groove (5), an elastic material made cutter particle pressing block (3) is arranged in the pressing placement groove (5), the shape of the cutter particle pressing block (3) is matched with the shape of the pressing placement groove (5), a threaded connection groove (7) is further arranged on the inner side of the pressing placement groove (5), a tightening bolt (6) is arranged through the cutter particle pressing block (3), the tightening bolt (6) is threadedly connected in the threaded connection groove (7), and the tightening bolt (6) is inclined towards the side of the milling cutter particle (4). The side of the cutter particle pressing block (3) towards the milling cutter particle (4) is inclined to form an inclined surface, the inclined surface comprises a first inclined surface (8), a second inclined surface (9) and a third inclined surface (10) connected in sequence, the second inclined surface (9) is closest to the milling cutter particle (4), the intersection of the first inclined surface (8) and the second inclined surface (9) forms an intersection connection line (11), the intersection connection line (11) is inclined towards the milling cutter particle (4), and the intersection connection line (11) is provided with a nearest contact point (12), which is the point on the intersection connection line (11) closest to the milling cutter particle (4). When the tightening bolt (6) is gradually screwed in the threaded connection groove (7), the cutter particle pressing block (3) is elastically deformed towards the side of the milling cutter particle (4), the nearest contact point (12), the intersection connection line (11) and the second inclined surface (9) contact the milling cutter particle (4) in sequence, and the milling cutter particle (4) is pressed.

2. The wedge insert indexable milling head (1) structure according to claim 1, characterized in that: A self-locking washer is arranged on the tightening bolt (6), when the tightening bolt (6) is threadedly connected with the threaded connection groove (7), the self-locking washer reversely locks the tightening bolt (6) and the threaded connection groove (7).

3. The wedge insert indexable milling head (1) structure according to claim 1, characterized in that: The inner surface of the threaded connection groove (7) and the outer surface of the tightening bolt (6) are both provided with an anticorrosion coating.

4. The wedge loctite milling cutter (1) structure according to claim 1, characterized in that: The second inclined surface (9) of the cutter particle pressing block (3) in contact with the milling cutter particle (4) is an arc curved surface.

5. The wedge loctite milling cutter (1) structure according to claim 1, characterized in that: The surface of the milling cutter head (1) and the cutter particle placement groove (2) is provided with an anti-sticking coating.

6. The wedge loctite milling cutter (1) structure according to claim 1, characterized in that: The outer edge of the milling cutter head (1) is further provided with a plurality of chip removal holes (13), and the chip removal holes (13) are communicated with the pressing placement groove (5).

7. The wedge loctatable milling head (1) structure according to claim 6, characterized in that: The outer edge of the milling cutter head (1) is provided with a plurality of airflow guide grooves (14), the airflow guide grooves (14) are inclined towards the rotation direction of the milling cutter head (1) during work, and the airflow guide grooves (14) are communicated with the chip removal holes (13).

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