A root clearing slot end mill

Abstract

This utility model belongs to the field of machining tool technology, specifically providing a root clearing slot end mill, including a tool shank and a tool body. The tool body is polygonal, with a cutting edge at each corner. The end face of the tool shank has a plurality of slots evenly distributed around its center, which fit the tool body. The tool body is placed in the slots. The side of the tool body has a mounting surface and a clearance surface from top to bottom. The inward indentation of the clearance surface forms a step with the mounting surface. The mounting surface is in close contact with the side of the slot, and the lower end face of the tool body is in close contact with the bottom surface of the slot. The clearance surface ensures that the tool body will not interfere with the slot during installation, reducing the grinding area of ​​the mounting surface, shortening the manufacturing cycle, and reducing manufacturing costs. It also concentrates the force on the upper mounting surface during operation. Furthermore, the polygonal tool body has multiple cutting edges, each of which is indexable, increasing the tool body's service life.

Description

Technical Field

[0001] This utility model relates to the field of machining tool technology, and in particular to a root clearing slot milling cutter. Background Technology

[0002] In machining, mold manufacturing, and parts design, root removal refers to the process of removing excess material from corners, roots, or joints of parts to bring the corners closer to the ideal design shape (such as right angles, acute angles, or specific rounded corners). Its core purpose is to eliminate "root nodules," "burrs," or excess material remaining at corners after machining or forming due to process limitations, ensuring that the parts meet design accuracy, assembly requirements, or functional needs.

[0003] Currently, in the machining process of bearing mounting holes in new energy motor housings, there is usually a need for root cleaning at the bottom of the bearing housing. The shape of this root cleaning groove is quite special, and the commonly used slot milling cutters on the market cannot meet the requirements. The current common machining method usually uses non-standard design and manufacturing of solid carbide tools, which leads to increased tool usage costs, long manufacturing cycles, and high costs.

[0004] Therefore, it is necessary to design a root clearing slot end mill to address the aforementioned technical issues, meet customer needs, significantly reduce customer usage costs, and shorten manufacturing costs and cycle time. Utility Model Content

[0005] In view of the above-mentioned problems in the existing technology, this utility model provides a root clearing slot end mill, which aims to solve the above-mentioned technical problems.

[0006] Technical Solution: To achieve the above objectives, this utility model provides a root clearing slot end mill, including a shank and a cutter body. The cutter body is polygonal, with a cutting edge at each corner. The end face of the shank has a plurality of slots evenly distributed around its center, which fit the cutter body. The cutter body is disposed in the slots. The side of the cutter body has a mounting surface and a clearance surface from top to bottom. The inward indentation of the clearance surface forms a step with the mounting surface. The mounting surface is in close contact with the side of the slot, and the lower end face of the cutter body is in close contact with the bottom surface of the slot.

[0007] In this invention, the tool body is provided with a tool body mounting surface and a tool body mounting avoidance surface. The tool body mounting avoidance surface ensures that the tool body will not interfere with the tool groove during installation, reduces the grinding area of ​​the tool body mounting surface, shortens the manufacturing cycle, and reduces manufacturing costs. At the same time, it can also concentrate the force on the upper tool body mounting surface during operation. In addition, the polygonal tool body is provided with multiple cutting edges, each of which is indexable, thereby improving the service life of the tool body.

[0008] Furthermore, the tool groove is provided with a tool tip cutting edge avoidance part, which can accommodate one tool tip cutting edge.

[0009] Furthermore, the blade body has a screw mounting hole at its center, and the blade groove has a corresponding threaded hole on its upper surface. The blade body is detachably mounted in the blade groove by means of screws.

[0010] Furthermore, the screw mounting hole is die-cast and has rounded corners and arc transitions inside.

[0011] Furthermore, the flatness of the mounting surface and the lower end surface of the blade body is within 0.01mm, ensuring that they can make close contact with the side and bottom surfaces of the blade groove.

[0012] Furthermore, the end of the cutting edge of the blade tip is provided with a blade tip forming rounded corner, and the radius of the rounded corner is 0.3~0.6mm.

[0013] Furthermore, the cutting edge of the blade tip is inclined towards the upper end face of the blade body, with an inclination angle R1 = 3°~5°, a rake angle R2 = 0°~20°, a profile angle R3 = 30°~60°, and a width W = 1.5mm.

[0014] Furthermore, the upper surface of the cutter body is provided with an end face cleaning surface, which is a countersunk hole 0.2-0.5 mm lower than the end face of the cutter body. The end face cleaning surface can effectively prevent interference between the end face of the cutting edge of the cutter tip and the surface of the part when in use.

[0015] Furthermore, the blade body is made of cermet or cemented carbide, and the surface of the cutting edge of the blade tip is provided with a wear-resistant coating to enhance the durability of the cutting edge of the blade tip.

[0016] Compared with the prior art, the root clearing slot end mill provided by this utility model has the following beneficial effects:

[0017] 1. The tool body in this utility model is polygonal, with a cutting edge at each corner. This cutting edge can be rotated multiple times, improving the tool body's service life. By providing a tool body mounting avoidance surface, the lower part of the tool body does not interfere with the rounded corners in the tool groove, affecting the installation of the tool body 200. Furthermore, the tool body mounting surface and the tool body mounting avoidance surface ensure that only the upper tool body mounting surface contacts the side of the tool groove, eliminating the influence of the tool groove's side slope. During use, the force is concentrated on the upper tool body mounting surface rather than the bottom, allowing for a tighter lock between the tool body and the tool groove, reducing vibration during machining and minimizing impact on machining accuracy. In addition, the tool body mounting avoidance surface reduces the area of ​​the tool body mounting surface, decreasing the area requiring grinding on the tool body, thus lowering the manufacturing cycle and cost.

[0018] 2. The root clearing slot end mill provided by this utility model can achieve standardized production, solving the problems of long manufacturing cycle and high manufacturing cost of previous non-standard solid carbide end mills.

[0019] 3. The tool mounting structure is simple, with a vertical insert design, resulting in a more compact tool structure and maximum tool rigidity. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a root-cleaning slot milling cutter according to the present invention;

[0021] Figure 2 This is a schematic diagram of the installation of the blade body and the blade groove according to this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the tool holder described in this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the blade body described in this utility model;

[0024] Figure 5 This is a side view of the blade body described in this utility model;

[0025] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0026] Figure 7 This is a front view of the blade body described in this utility model;

[0027] Figure 8 for Figure 7 Enlarged view of point B in the middle;

[0028] Figure 9 This is a schematic diagram of machining using the root-clearing milling cutter described in this utility model.

[0029] In the diagram: 100-tool holder, 101-tool groove, 1011-tool tip cutting edge clearance part, 1012-threaded hole;

[0030] 200-Tool body, 201-Tool tip cutting edge, 2011-Tool tip forming radius, 202-Tool body mounting surface, 203-Tool body mounting clearance surface, 204-Screw mounting hole, 205-End face cleaning surface. Detailed Implementation

[0031] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings, so that the advantages and features of this utility model can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of this utility model. The embodiments of this utility model include the following parts:

[0032] like Figure 1-4 As shown, a root clearing slot end mill includes a shank 100 and a cutter body 200. The cutter body 200 is polygonal, with a cutting edge 201 at each corner. The end face of the shank 100 has a plurality of slots 101 evenly distributed around its center, which fit into the cutter body 200. The cutter body 200 is disposed within the slots 101. The side surface of the cutter body 200 has a mounting surface 202 and a clearance surface 203 from top to bottom. The inward indentation of the clearance surface 203 forms a step with the mounting surface 202. The mounting surface 202 is in close contact with the side surface of the slot 101, and the lower end face of the cutter body 200 is in close contact with the bottom surface of the slot 101.

[0033] In this embodiment, the cutter body 200 is triangular, and each of the three corners of the cutter body 200 is provided with a cutting edge 201. The cutting edge 201 can be rotated three times, which improves the service life of the cutter body 200. In the actual machining of the tool groove 101, the transition between the side and bottom surfaces of the tool groove 101 cannot be a perfect right angle; it is generally a rounded corner with a slight angle. By setting the cutter body mounting avoidance surface 203, the lower part of the cutter body 200 does not interfere with the rounded corner in the tool groove, thus affecting the installation of the cutter body 200. In addition, the side surface of the tool groove 101 cannot be a perfectly vertical and horizontal plane. By setting the cutter body mounting surface 202 and the cutter body mounting avoidance surface 203, only the upper cutter body mounting surface 202 contacts the side surface of the tool groove 101. During use, the force is concentrated on the upper cutter body mounting surface 202 rather than the bottom. In this way, the cutter body 200 and the tool groove 101 can be locked more tightly, and vibration during machining is less likely to affect the machining accuracy. In addition, in order to improve machining accuracy, the tool body 200 and the tool groove 101 need to be precisely installed, which requires fine grinding of the contact surfaces. After setting the tool body mounting avoidance surface 203, the area of ​​the tool body mounting surface 202 is reduced, the area that needs to be ground on the tool body 200 is reduced, and the manufacturing cycle and cost are reduced.

[0034] like Figure 5-8 As shown, the tool groove 101 is provided with a tool tip cutting edge avoidance part 1011, which can accommodate a tool tip cutting edge 201.

[0035] The blade body 200 has a screw mounting hole 204 at its center, and the blade groove 101 has a corresponding threaded hole 1012 on its upper surface. The blade body 200 is detachably mounted in the blade groove 101 by screws. The screw mounting hole 204 is die-cast and has rounded corners and arc transitions inside.

[0036] Specifically, the flatness of the mounting surface 202 and the lower end surface of the blade body 200 is within 0.01mm.

[0037] The cutting edge 201 has a rounded corner 2011 at its end, the radius of which ranges from 0.3 to 0.6 mm depending on the shape of the root groove on the part. The cutting edge 201 is inclined towards the upper surface of the tool body 200 at an angle R1 of 3° to 5°. The rake angle R2 of the cutting edge 201 can be selected from 0° to 20° depending on the material being processed. The profile angle R3 of the cutting edge 201 ranges from 30° to 60° depending on the shape of the root groove. The width W of the cutting edge 201 is 1.5 mm. The profile formed by R1, R2, R3, and W is the profile of the root groove to be machined. The angles and widths of these areas can vary depending on the size and shape of the root groove, allowing for various specifications to be derived to meet different part requirements.

[0038] Specifically, the upper surface of the cutter body 200 is provided with an end face cleaning surface 205, which is a countersunk hole 0.2-0.5 mm lower than the end face of the cutter body.

[0039] Specifically, the blade body 200 is made of cermet or cemented carbide, and the surface of the cutting edge 201 at the tip is provided with a wear-resistant coating.

[0040] The root-cleaning slotting cutter provided by this utility model feeds along the center of the workpiece during operation. After reaching the designated position, it begins interpolation until the end face and root of the part are machined. Figure 9 As shown.

[0041] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A root clearing slot end mill, comprising a tool holder (100) and a tool body (200), characterized in that, The blade body (200) is polygonal, and each corner of the blade body (200) is provided with a cutting edge (201). The end face of the blade shank (100) is provided with a plurality of grooves (101) that fit with the blade body (200) evenly distributed around its center. The blade body (200) is located in the grooves (101). The side of the blade body (200) is provided with a blade mounting surface (202) and a blade mounting clearance surface (203) from top to bottom. The inward indentation of the blade mounting clearance surface (203) forms a step with the blade mounting surface (202). The blade mounting surface (202) is in close contact with the side of the groove (101). The lower end face of the blade body (200) is in close contact with the bottom surface of the groove (101).

2. The root-cleaning slot milling cutter according to claim 1, characterized in that, The tool groove (101) is provided with a cutting edge avoidance part (1011), which can accommodate a cutting edge (201).

3. A root-cleaning slot milling cutter according to claim 1, characterized in that, The blade body (200) has a screw mounting hole (204) at its center, and the blade groove (101) has a corresponding threaded hole (1012) on its upper surface. The blade body (200) is detachably mounted in the blade groove (101) by screws.

4. A root-cleaning slot milling cutter according to claim 3, characterized in that, The screw mounting hole (204) is die-cast and has rounded corners and arc transitions inside.

5. A root-cleaning slot milling cutter according to claim 1, characterized in that, The flatness of the mounting surface (202) and the lower end surface of the blade (200) is within 0.01 mm.

6. A root-cleaning slot milling cutter according to claim 1, characterized in that, The end of the cutting edge (201) is provided with a cutting edge forming rounded corner (2011), and the radius of the rounded corner (2011) is 0.3~0.6mm.

7. A root-cleaning slotting cutter according to claim 1, characterized in that, The cutting edge (201) is inclined towards the upper end face of the blade body (200) with an inclination angle R1 = 3°~5°, the rake angle of the cutting edge (201) R2 = 0°~20°, the profile angle of the cutting edge (201) R3 = 30°~60°, and the width of the cutting edge (201) W = 1.5mm.

8. A root-cleaning slot milling cutter according to claim 1, characterized in that, The upper surface of the cutter body (200) is provided with an end face cleaning surface (205), which is a countersunk hole 0.2-0.5 mm lower than the end face of the cutter body.

9. A root-cleaning slot milling cutter according to claim 1, characterized in that, The blade body (200) is made of cermet or cemented carbide, and the surface of the cutting edge (201) of the blade tip is provided with a wear-resistant coating.

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