Milling tool

Abstract

This invention relates to the field of milling cutter technology, specifically disclosing a milling tool. The milling tool includes a cutter body, a first insert, and a second insert. The first insert is located at a first mounting position circumferentially on the cutter body, and has a first cutting edge. The distance between the first cutting edge and the axis L of the cutter body is H1. The second insert is located at a second mounting position circumferentially on the cutter body, and has a second cutting edge. The distance between the second cutting edge and the axis L of the cutter body is H2, where ΔH is the difference between H1 and H2, and ΔH is greater than zero. When the first insert chipps, it can be removed, and machining can continue after resetting the tool, saving the step of installing the second insert, reducing machining time, and improving machining efficiency. Furthermore, even if the first mounting position where the first insert is mounted suffers irreversible damage, it will not affect the second mounting position where the second insert is mounted, thus extending the tool's service life.

Description

Technical Field

[0001] This invention relates to the field of milling cutter technology, and more particularly to a milling tool. Background Technology

[0002] In the process of new product development, many destructive tests are often conducted. Because the lifespan and performance of new cutting tools vary, the cutting edge may chip during machining. To ensure continuous testing, all cutting tools need to be removed and replaced with new ones, reducing testing efficiency. Furthermore, chipped cutting tools damage the mounting points, requiring repair and maintenance of the tool head, further reducing testing efficiency. In more severe cases, irreversible damage to the tool head can occur, rendering it unusable and increasing testing costs.

[0003] Therefore, it is urgent to research a milling cutter to solve the problem that when one insert breaks, all inserts need to be replaced, resulting in low test efficiency and further reducing test efficiency after affecting the cutter head. It is also necessary to solve the problem that irreversible damage to the cutter head section where one insert is installed will lead to the scrapping of the cutter head. Summary of the Invention

[0004] The purpose of this invention is to provide a milling cutter that solves the problem that when one insert breaks, all inserts need to be replaced, resulting in low test efficiency and further reducing test efficiency after affecting the cutter head. It also solves the problem that irreversible damage to the cutter head section where one insert is installed leads to the scrapping of the cutter head.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This invention provides a milling tool, which includes:

[0007] Blade body;

[0008] A first blade is disposed at a first mounting portion in the circumferential direction of the blade body. The first blade has a first cutting edge, and the distance between the first cutting edge and the axis L of the blade body is H1.

[0009] The second blade is disposed at a second mounting position in the circumference of the blade body, and the second blade has a second cutting edge; the distance between the second cutting edge and the axis L of the blade body is H2, ΔH is the difference between H1 and H2, and ΔH is greater than zero.

[0010] Optionally, H1 is greater than H2, and ΔH is greater than or equal to 0.05 mm and less than or equal to 0.5 mm.

[0011] Optionally, the first blade and the second blade have the same structure, the distance between the first mounting part and the axis L of the blade body is K1, the distance between the second mounting part and the axis L of the blade body is K2, ΔK is the difference between K1 and K2, and ΔK is greater than zero.

[0012] Optionally, the first blade includes an upper end face, a lower end face, a front side face, a rear side face, a left side face, and a right side face, wherein the upper end face and the lower end face are arranged opposite to each other, the front side face and the rear side face are arranged opposite to each other, and the left side face and the right side face are arranged opposite to each other.

[0013] Optionally, the first blade is provided with a fixing hole that extends through the front side and the rear side; a fixing screw passes through the fixing hole and is screwed to the blade body.

[0014] Optionally, the blade body includes a blade disc and a connecting cylinder. The end face of the first end of the blade disc is connected to the connecting cylinder. The first mounting portion includes a first mounting groove located on the side of the blade disc and near the second end of the blade disc, and a third mounting groove located on the side of the blade disc and near the first end. The second mounting portion includes a second mounting groove located on the side of the blade disc and near the second end, and a fourth mounting groove located on the side of the blade disc and near the first end. The first blade is installed in both the first mounting groove and the third mounting groove, and the second blade is installed in both the second mounting groove and the fourth mounting groove.

[0015] Optionally, two adjacent first blades form a first cutting edge with a length of W1, and two adjacent second blades form a second cutting edge with a length of W2, where ΔW is the difference between W1 and W2, and ΔW is greater than zero.

[0016] Optionally, W1 is greater than W2, and ΔW is greater than or equal to 0.1 mm and less than or equal to 1 mm.

[0017] Optionally, adjacent first mounting slots and second mounting slots form a first slot group, and adjacent third mounting slots and fourth mounting slots form a second slot group. The first slot group and the second slot group are alternately arranged at the first end and the second end in a clockwise direction S of the blade body.

[0018] Optionally, the connecting cylinder includes a first cylinder, a second cylinder, and a third cylinder connected end to end, wherein the outer diameter of the second cylinder is smaller than the outer diameter of the first cylinder and smaller than the outer diameter of the third cylinder.

[0019] The beneficial effects of this invention are as follows:

[0020] This invention provides a milling cutter. By configuring a first insert and a second insert with different distances between the first and second cutting edges and the axis L, the first insert can be removed when it chipps. Since both inserts are pre-installed on the cutter body before machining, there is no need for resetting the tool. Machining can continue after compensation as needed, saving the step of installing the second insert during machining, reducing machining time, and improving efficiency. Furthermore, even if the first mounting point of the first insert suffers irreversible damage, it will not affect the second mounting point of the second insert, preventing the entire cutter from being scrapped and extending its service life. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a milling tool in an embodiment of the present invention, from a first-person perspective;

[0022] Figure 2 This is an exploded view of the milling tool in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the milling tool structure in an embodiment of the present invention, from a second perspective;

[0024] Figure 4 This is a schematic diagram of the structure of the first blade in an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the overlap between the first blade and the second blade in an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the milling tool structure in an embodiment of the present invention, from a third-person perspective;

[0027] Figure 7 This is a schematic diagram of the structure of a milling tool in an embodiment of the present invention, from a fourth perspective.

[0028] In the picture:

[0029] 1. Tool body; 11. Tool disc; 111. First mounting slot; 1111. Bottom positioning surface; 1112. Axial positioning surface; 1113. Tangential positioning surface; 112. Second mounting slot; 113. Third mounting slot; 114. Fourth mounting slot; 115. Chip removal groove; 12. Connecting cylinder; 121. First cylinder; 122. Second cylinder; 123. Third cylinder; 124. Keyway;

[0030] 2. First blade; 21. Upper end face; 22. Lower end face; 23. Front side face; 24. Left side face; 25. Long side cutting edge; 26. Short side cutting edge; 27. Corner cutting edge; 28. Fixing hole; 29. ​​Fixing screw;

[0031] 3. Second blade. Detailed Implementation

[0032] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Furthermore, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0036] In the process of new product development, many destructive tests are often conducted. Because the lifespan and performance of new cutting tools vary, the cutting edge may chip during machining. To ensure continuous testing, all cutting tools need to be removed and replaced with new ones, reducing testing efficiency. Furthermore, chipped cutting tools damage the mounting points, requiring repair and maintenance of the tool head, further reducing testing efficiency. In more severe cases, irreversible damage to the tool head can occur, rendering it unusable and increasing testing costs.

[0037] Therefore, this application provides a cutting tool to solve the problems of low blade testing efficiency and easy damage to the tool head during the testing process in the prior art.

[0038] like Figure 1-3 As shown in the figure, this embodiment provides a milling cutter, which includes a cutter body 1, a first insert 2, and a second insert 3. For ease of explanation, in the figures of this embodiment, C represents the first insert 2, D represents the second insert 3, and N represents the rotation direction of the cutter body 1. The first insert 2 is located at a first mounting position in the circumferential direction of the cutter body 1 and has a first cutting edge. The distance between the first cutting edge and the axis L of the cutter body 1 is H1. The second insert 3 is located at a second mounting position in the circumferential direction of the cutter body 1 and has a second cutting edge. The distance between the second cutting edge and the axis L of the cutter body 1 is H2. ΔH is the difference between H1 and H2, and ΔH is greater than zero.

[0039] This milling cutter features a first insert 2 and a second insert 3, with different distances between the first and second cutting edges and the axis L. Therefore, when the first insert 2 chipps, it can be removed. Since the first insert 2 and the second insert 3 are already installed on the cutter body 1 before machining, there is no need for re-setting the tool. After compensation as needed, machining can continue, saving the step of installing the second insert 3 during machining, reducing machining time, and improving efficiency. Furthermore, even if the first mounting point of the first insert 2 suffers irreversible damage, it will not affect the second mounting point of the second insert 3, preventing the entire tool from being scrapped and extending its service life. In this embodiment, the first insert 2 is assumed to be higher than the second insert 3. In other embodiments, if the first insert 2 is lower than the second insert 3, the second insert 3 must be used first. When the second insert 3 chipps, it can be removed and compensated before the first insert 2 can be used to continue machining. For ease of explanation, the following description uses the example of the first insert 2 being higher than the second insert 3, meaning the distance between the first cutting edge and the axis L is greater than the distance between the second cutting edge and the axis L.

[0040] The above configuration ensures that during the rotation of the tool body 1 around axis L, the cutting layers formed by the first cutting edge and the second cutting edge do not overlap. Therefore, the cutting processes of the first and second cutting edges do not interfere with each other during machining. Specifically, H1 is greater than H2, and ΔH is greater than or equal to 0.05mm and less than or equal to 0.5mm. For example, H1 is greater than H2, and ΔH is greater than or equal to 0.05mm and less than or equal to 0.25mm.

[0041] In this embodiment, the first blade 2 and the second blade 3 have identical structures. The distance between the first mounting part and the axis L of the blade body 1 is K1, and the distance between the second mounting part and the axis L of the blade body 1 is K2. ΔK is the difference between K1 and K2, and ΔK is greater than zero. This arrangement allows the first blade 2 and the second blade 3 to be interchangeable, thereby saving mold opening costs and reducing the processing cost of the blades. The aforementioned distances refer to the minimum straight-line distance between the mounting part and the axis L.

[0042] Of course, in other embodiments, the distance between the first mounting part and the axis L of the blade body 1 can be equal to the distance between the second mounting part and the axis of the blade body 1. At the same time, the structures of the first blade 2 and the second blade 3 can be different, and the same technical effect as the above embodiment can be achieved by reasonably setting the specific structures of the first blade 2 and the second blade 3.

[0043] In one embodiment, the length of the first cutting edge is greater than that of the second cutting edge to achieve milling of grooves of different widths.

[0044] When the width of the groove to be milled is larger, two cutting inserts are needed to overlap, meaning the two inserts are joined together to form a single, complete cutting edge. For details, please refer to [link / reference needed]. Figure 2 and Figure 7 The cutter body 1 includes a cutter disc 11 and a connecting cylinder 12. The end face of the first end of the cutter disc 11 is connected to the connecting cylinder 12. The first mounting portion includes a first mounting groove 111 located on the side of the cutter disc 11 near the second end of the cutter disc 11 and a third mounting groove 113 located on the side of the cutter disc 11 near the first end. The second mounting portion includes a second mounting groove 112 located on the side of the cutter disc 11 near the second end and a fourth mounting groove 114 located on the side of the cutter disc 11 near the first end. First blades 2 are installed in both the first mounting groove 111 and the third mounting groove 113, and second blades 3 are installed in both the second mounting groove 112 and the fourth mounting groove 114. In this embodiment, two first blades 2 overlap and two second blades 2 overlap to increase the width of the milling groove.

[0045] Alternatively, please refer to Figure 3 and Figure 5 ,in Figure 5The diagram shows the projections formed by the first blade 2 and the second blade 3 as they rotate with the tool body 1 during the cutting process. Thus, two adjacent first blades 2 overlap to form a first cutting edge with a length of W1, and two adjacent second blades 3 overlap to form a second cutting edge with a length of W2. ΔW is the difference between W1 and W2, and ΔW is greater than zero. Figure 5 The ΔY marked in the figure represents the difference between one side of the first cutting edge and one side of the second cutting edge. ΔW and ΔY can be independent parameters; ΔW is not necessarily equal to twice ΔY, although in some cases ΔW can be set to twice ΔY. This setting allows the milling tool in this embodiment to complete the milling of slots of two sizes. Of course, the second insert 3 can only be used for milling after the first insert 2 has been removed.

[0046] Specifically, W1 is greater than W2, and ΔW is greater than or equal to 0.1 mm and less than or equal to 1 mm. For example, W1 is greater than W2, and ΔW is greater than or equal to 0.1 mm and less than or equal to 0.3 mm. ΔW = 2ΔY, where ΔY is greater than or equal to 0.05 mm and less than or equal to 0.15 mm.

[0047] To improve the uniformity of blade distribution, please refer to... Figure 2 and Figure 3 In this embodiment, adjacent first mounting slots 111 and second mounting slots 112 form a first slot group, and adjacent third mounting slots 113 and fourth mounting slots 114 form a second slot group. The first and second slot groups are alternately arranged at the first and second ends in a clockwise direction S along the cutter body 1. In one embodiment, there is one first mounting location and one second mounting location, and the cutter disc 11 is provided with the first mounting slot 111, second mounting slot 112, third mounting slot 113, and fourth mounting slot 114 in a clockwise direction S. In another embodiment, there are two first mounting locations and two second mounting locations. Specifically, the cutter disc 11 is provided with the first mounting slot 111, second mounting slot 112, third mounting slot 113, and fourth mounting slot 114 in a clockwise direction S, wherein a chip removal groove 115 is provided between every two adjacent mounting slots. The four first blades 2 can be labeled C1, C2, C3, and C4 respectively, forming two first cutting edges. C1 and C2 overlap to form one first cutting edge, and C3 and C4 overlap to form another first cutting edge. The four second blades 3 can be labeled D1, D2, D3, and D4 respectively, forming two second cutting edges. D1 and D2 overlap to form one second cutting edge, and D3 and D4 overlap to form another second cutting edge.

[0048] Please refer to Figure 4The first blade 2 includes an upper end face 21, a lower end face 22, a front side face 23, a rear side face, a left side face 24, and a right side face. The upper end face 21 and the lower end face 22 are arranged opposite each other, the front side face 23 and the rear side face are arranged opposite each other, and the left side face 24 and the right side face are arranged opposite each other. The upper end face 21 has two opposite long-side cutting edges 25 and two opposite short-side cutting edges 26 on each of its four sides, and at least two opposite corners have corner cutting edges 27. Symmetrically, the lower end face 22 also has two opposite long-side cutting edges 25 and two opposite short-side cutting edges 26 on each of its four sides, and at least two opposite corners have corner cutting edges 27. In other embodiments, corner cutting edges 27 are provided at all four corners of the upper end face 21 and all four corners of the lower end face 22.

[0049] In specific applications, the first blade 2 and the second blade 3 can have the same structure, and are not limited to the blade structure in the above embodiments. Of course, in other embodiments, the structures of the first blade 2 and the second blade 3 can also be different, as long as the cutting ranges formed by the cutting edges of the first blade 2 and the second blade 3 are different.

[0050] In this embodiment, please continue to refer to Figure 4 The first blade 2 has a fixing hole 28 that extends through the front side 23 and the rear side. Both ends of the fixing hole 28 have countersunk holes to allow the first blade 2 to remain usable even after being flipped over. A fixing screw 29 passes through the fixing hole 28 and is screwed onto the blade body 1.

[0051] The first mounting groove 111 and the second mounting groove 112 have the same structure but different distances from the axis L. The first mounting groove 111 and the third mounting groove 113 are symmetrical about the center line of the first end and the second end. Taking the first mounting groove 111 as an example, please refer to... Figure 2 The first mounting groove 111 includes a bottom positioning surface 1111, an axial positioning surface 1112, and a tangential positioning surface 1113. When the first insert 2 is horizontally positioned, i.e., when the fixing screw 29 is perpendicular to the bottom positioning surface 1111, the rear side abuts against the bottom positioning surface 1111, the lower end surface 22 abuts against the tangential positioning surface 1113, and the right side abuts against the axial positioning surface 1112. At this time, the long-side cutting edge 25 and the corner cutting edge 27 can participate in the milling operation. When the first insert 2 is vertically positioned, i.e., when the fixing screw 29 is perpendicular to the axial positioning surface 1113, the left side surface 24 abuts against the bottom positioning surface 1111, the rear side abuts against the axial positioning surface 1113, and the lower end surface 22 abuts against the tangential positioning surface 1112. At this time, the short-side cutting edge 26 and the corner cutting edge 27 can participate in the milling operation.

[0052] The connecting cylinder 12 has an inner hole and includes a first cylinder 121, a second cylinder 122, and a third cylinder 123 connected end to end. The outer diameter of the second cylinder 122 is smaller than that of the first cylinder 121 and the third cylinder 123. This design facilitates handholding, improves grip, and effectively prevents the blade 1 from slipping from the hand.

[0053] The third cylinder 123 has a keyway 124 at the end furthest from the cutter head 11, so as to facilitate installation on the drive shaft of the milling machine.

[0054] Optionally, the milling cutter may further include a third insert, which is disposed circumferentially on the cutter body 1 and has a third cutting edge; the distance between the third cutting edge and the axis L of the cutter body 1 is H3, Δ1H is the difference between H2 and H3, and Δ1H is greater than zero. Specifically, H3 is less than H2, and Δ1H is greater than or equal to 0.05mm and less than or equal to 0.25mm.

[0055] In this embodiment, for example, two sets of mounting slots are provided at the first end and two sets of mounting slots are provided at the second end. The mounting slots at the first end and the second end are alternately arranged along the clockwise direction S of the cutter head 11. Each set of mounting slots has three slots. In each set of three mounting slots, the first blade 2, the second blade 3 and the third blade are arranged sequentially along the clockwise direction S of the cutter head 11.

[0056] The milling cutter provided in this embodiment of the invention features a first insert 2 and a second insert 3, with different distances between the first and second cutting edges and the axis L. Therefore, when the first insert 2 chipps, it can be removed. Since the first insert 2 and the second insert 3 are already installed on the cutter body 1 before machining, there is no need for tool setting. Machining can continue after compensation as needed, saving the step of installing the second insert 2 during machining, reducing machining time, and improving machining efficiency. Furthermore, even if the first mounting part of the first insert 2 suffers irreversible damage, it will not affect the second mounting part of the second insert 3, preventing the entire cutter from being scrapped and extending the tool's service life.

[0057] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A milling machining method, characterized in that, Includes a milling tool, said milling tool comprising: Blade body (1); The first blade (2) is located at the first mounting position in the circumferential direction of the blade body (1). The first blade (2) has a first cutting edge, and the distance between the first cutting edge and the axis L of the blade body (1) is H1. The second blade (3) is located at the second mounting position in the circumferential direction of the blade body (1). The second blade (3) has a second cutting edge. The distance between the second cutting edge and the axis L of the blade body (1) is H2, ΔH is the difference between H1 and H2, and ΔH is greater than zero. During the rotation of the blade (1) around the axis L, the cutting layer formed by the first blade and the cutting layer formed by the second blade do not overlap; H1 is greater than H2, and ΔH is greater than or equal to 0.05 mm and less than or equal to 0.5 mm; During the machining process, the first insert (2) is used for milling. When the first insert (2) breaks, it is removed from the tool body (1), and the second insert (3) is used to continue the subsequent machining task after tool compensation. During machining, the cutting layer formed by the first cutting edge or the cutting layer formed by the second cutting edge does not interfere with each other.

2. The milling method according to claim 1, characterized in that, The first blade (2) and the second blade (3) have the same structure. The distance between the first mounting part and the axis L of the blade body (1) is K1, and the distance between the second mounting part and the axis L of the blade body (1) is K2. ΔK is the difference between K1 and K2, and ΔK is greater than zero.

3. The milling method according to claim 2, characterized in that, The first blade (2) includes an upper end face (21), a lower end face (22), a front side face (23), a rear side face, a left side face (24), and a right side face. The upper end face (21) and the lower end face (22) are arranged opposite to each other, the front side face (23) and the rear side face are arranged opposite to each other, and the left side face (24) and the right side face are arranged opposite to each other.

4. The milling method according to claim 3, characterized in that, The first blade (2) is provided with a fixing hole (28), which passes through the front side (23) and the rear side; a fixing screw (29) passes through the fixing hole (28) and is screwed to the blade body (1).

5. The milling method according to any one of claims 1 to 4, characterized in that, The blade body (1) includes a blade disc (11) and a connecting cylinder (12). The end face of the first end of the blade disc (11) is connected to the connecting cylinder (12). The first mounting part includes a first mounting groove (111) located on the side of the blade disc (11) and near the second end of the blade disc (11) and a third mounting groove (113) located on the side and near the first end. The second mounting part includes a second mounting groove (112) located on the side and near the second end and a fourth mounting groove (114) located on the side and near the first end. The first blade (2) is installed in both the first mounting groove (111) and the third mounting groove (113), and the second blade (3) is installed in both the second mounting groove (112) and the fourth mounting groove (114).

6. The milling method according to claim 5, characterized in that, Two adjacent first blades (2) form a first cutting edge with a length of W1. Two adjacent second blades (3) form a second cutting edge with a length of W2. ΔW is the difference between W1 and W2, and ΔW is greater than zero.

7. The milling method according to claim 6, characterized in that, The W1 is greater than the W2, and the ΔW is greater than or equal to 0.1 mm and less than or equal to 1 mm.

8. The milling method according to claim 5, characterized in that, The adjacent first mounting slot (111) and the second mounting slot (112) form a first slot group, and the adjacent third mounting slot (113) and the fourth mounting slot (114) form a second slot group. The first slot group and the second slot group are alternately arranged at the first end and the second end in a clockwise direction S along the blade body (1).

9. The milling method according to claim 5, characterized in that, The connecting cylinder (12) includes a first cylinder (121), a second cylinder (122) and a third cylinder (123) connected end to end. The outer diameter of the second cylinder (122) is smaller than the outer diameter of the first cylinder (121) and smaller than the outer diameter of the third cylinder (123).

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