End mill and machine tool

Abstract

The utility model discloses an end mill and a machine tool, and the end mill comprises a cutter handle which is provided with a threaded connection section; the tool bit is connected to one end of the tool handle, the end, away from the tool handle, of the tool bit is a machining end, a chip groove extending from the machining end to the tool handle is formed in the outer side wall of the tool bit, a cutting edge corresponding to the chip groove is formed in the machining end, the cutting edge comprises a main cutting edge and a chamfering edge adjacent to the main cutting edge, and an included angle is formed between the chamfering edge and the main cutting edge. The end mill disclosed by the utility model can be matched with the installation of a machine tool with a threaded hole in the cutter connecting part of the main shaft, and the end mill disclosed by the utility model can flexibly switch to use the main blade or the chamfering blade to chamfer a workpiece, so that the machining is convenient, and the application range is wide. In addition, when the end mill cuts the workpiece, generated cuttings can be discharged through the chip discharging groove, accumulation of the cuttings can be reduced, cutting resistance can be reduced, cutting efficiency can be improved, and meanwhile the risk that the cuttings scratch the workpiece can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of machining tool technology, and in particular to an end mill and a machine tool. Background Technology

[0002] In the field of machining, end mills are a commonly used type of cutting tool, widely used in various machining operations such as planar milling, contour milling, and slot milling.

[0003] 1. An end mill consists of a shank and a cutter head. The most common type of shank is the round shank. This type of shank holds the end mill by means of friction between the end mill holder and the outer surface of the shank. However, some special machine tools can only use a threaded connection to fix the end mill.

[0004] 2. For certain specific machining needs, some existing end mills have certain limitations, as they only have a single cutting edge and their application range is limited. Utility Model Content

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an end mill.

[0006] This utility model also proposes a machine tool having the above-mentioned end mill.

[0007] An end mill according to a first aspect of the present invention includes: a shank having a threaded connection section; a cutter head connected to one end of the shank, the end of the cutter head away from the shank being a machining end, the outer side wall of the cutter head having a chip removal groove extending from the machining end toward the shank, the machining end having a cutting edge corresponding to the chip removal groove, the cutting edge including a main cutting edge and a chamfering edge disposed adjacent to the main cutting edge, the chamfering edge being disposed at an angle to the main cutting edge.

[0008] The end mill according to the embodiments of this utility model has at least the following beneficial effects:

[0009] This end mill is compatible with machine tools where the spindle's tool connection section has a threaded hole. The end mill can machine the workpiece using either the main cutting edge or the chamfering edge, and the main cutting edge can also chamfer the workpiece. Thus, this end mill allows for flexible switching between the main cutting edge and the chamfering edge for chamfering, making machining convenient and applicable to a wide range of situations. Furthermore, during cutting, the chips generated by the end mill can be discharged through the chip vent, reducing chip accumulation, lowering cutting resistance, improving cutting efficiency, and also reducing the risk of chips scratching the workpiece.

[0010] According to some embodiments of the present invention, the chip removal groove has a chip removal surface, and the cutting head also has a first rear cutting surface connected to the side of the chip removal surface away from the handle and disposed opposite to the chip removal surface, wherein the first rear cutting surface cooperates with the chip removal surface to form the main cutting edge;

[0011] The cutter head also has a second rear cutting surface connected to the side of the chip removal surface away from the handle and disposed opposite to the chip removal surface, the second rear cutting surface cooperating with the chip removal surface to form the chamfering edge.

[0012] According to some embodiments of the present invention, the cutter head further has a third rear cutting surface connected to the side of the first rear cutting surface away from the main cutting edge and disposed opposite to the chip removal surface.

[0013] According to some embodiments of the present invention, the angle between the first flank face and the cutting plane of the main cutting edge is α1, and the angle between the third flank face and the cutting plane of the main cutting edge is α2; satisfying: α2>α1.

[0014] According to some embodiments of this utility model, 28°≤α1≤32°; 43°≤α2≤47°.

[0015] According to some embodiments of the present invention, the chip removal surface is set at an angle to the rotation center axis of the end mill.

[0016] According to some embodiments of this utility model, the angle between the chip removal surface and the rotation center axis of the end mill is β, which satisfies: 3°≤β≤8°.

[0017] According to some embodiments of the present invention, the cutter head is provided with a plurality of chip removal grooves arranged along the circumference of the end mill, and each chip removal groove is correspondingly provided with the cutting edge.

[0018] According to some embodiments of the present invention, one end of the tool holder is provided with a mounting groove, and the end of the tool tip away from the processing end passes through the mounting groove, and the tool tip is welded to the tool holder.

[0019] A machine tool according to a second aspect of the present invention includes: a spindle having a threaded hole; and an end mill from the above embodiment, wherein the threaded connecting section passes through the threaded hole.

[0020] The end mill according to the embodiments of this utility model has at least the following beneficial effects:

[0021] This end mill is compatible with machine tools where the spindle's tool connection section has a threaded hole. The end mill can machine the workpiece using either the main cutting edge or the chamfering edge, and the main cutting edge can also chamfer the workpiece. Thus, this end mill allows for flexible switching between the main cutting edge and the chamfering edge for chamfering, making machining convenient and applicable to a wide range of situations. Furthermore, during cutting, the chips generated by the end mill can be discharged through the chip vent, reducing chip accumulation, lowering cutting resistance, improving cutting efficiency, and also reducing the risk of chips scratching the workpiece.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0024] Figure 1 This is a schematic diagram of the structure of an end mill according to an embodiment of the present invention;

[0025] Figure 2 for Figure 1 The left view of the figure shown;

[0026] Figure 3 This is a partially enlarged view of an end mill according to an embodiment of the present invention;

[0027] Figure 4 This is a partially enlarged view of the blade head according to an embodiment of the present invention;

[0028] Figure 5 This is a blank drawing of the knife handle according to one embodiment of the present utility model.

[0029] Icon labels:

[0030] 100. Tool holder; 110. Threaded connection section; 120. Round shank; 130. Positioning table; 131. Mounting slot; 132. Flat face; 140. Empty tool groove;

[0031] 200, cutting head; 210, machining end; 220, chip removal groove; 221, chip removal surface; 230, first flank face; 240, second flank face; 250, third flank face; 260, main cutting edge; 270, chamfering edge. Detailed Implementation

[0032] The embodiments of this utility model 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 this utility model, and should not be construed as limiting this utility model.

[0033] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 utility model based on the specific circumstances.

[0035] like Figure 1 As shown, an embodiment of the present invention provides an end mill including a shank 100 and a cutter head 200. The cutter head 200 is connected to the shank 100, and the shank 100 is used to support the cutter head 200.

[0036] The tool holder 100 has a threaded connection section 110. Specifically, the outer surface of one section of the tool holder 100 is provided with external threads.

[0037] It is understandable that for some machine tools, the spindle has a threaded hole in the part where the tool is installed. By setting a threaded connection section 110 on the tool holder 100 and inserting the threaded connection section 110 into the threaded hole of the machine tool spindle, the tool can be fixed. Therefore, the end mill of this utility model can be adapted to machine tools where the spindle has a threaded hole in the part where the tool is installed.

[0038] Furthermore, the tool holder 100 also has a round shank 120 and a positioning table 130, wherein the threaded connecting section 110, the round shank 120 and the positioning table 130 are arranged sequentially along the axial direction of the tool holder 100, and the tool head 200 is connected to the positioning table 130.

[0039] In some embodiments, a hollow groove 140 is provided between the threaded connection section 110 and the round shank 120, and between the round shank 120 and the positioning table 130.

[0040] Understandably, the 140mm empty slot can remove excess material, reduce the overall weight of the tool, optimize the center of gravity distribution, and improve operational flexibility and control precision.

[0041] In some embodiments, the positioning stage 130 is further provided with a flat surface 132.

[0042] Understandably, the flat face 132 can be used in conjunction with other stop components on the machine tool to reduce the risk of slippage of the end mill when it is rotating at high speed or under force. At the same time, the design of the flat face 132 allows the flat face 132 to be clamped with a wrench or special tool to assist in installation or disassembly and avoid damage caused by directly clamping the cutting edge.

[0043] It should be noted that the above only shows some forms of the tool holder 100, and the specific form of the tool holder 100 can be changed in other ways.

[0044] like Figure 1 As shown, the cutter head 200 is connected to one end of the tool holder 100, and the cutter head 200 and the tool holder 100 are coaxially arranged. The end of the cutter head 200 away from the tool holder 100 is defined as the machining end 210. Specifically, when machining a workpiece using an end mill, the end of the cutter head 200 away from the tool holder 100 (machining end 210) acts on the workpiece to cut it.

[0045] Specifically, one end of the cutter head 200 is provided with a mounting groove 131, and one end of the cutter head 200 passes through the mounting groove 131. The cutter head 200 is welded to the cutter shank 100.

[0046] More specifically, the positioning table 130 has a mounting groove 131 at the end away from the threaded connection section 110, and the end of the cutting head 200 away from the machining end 210 passes through the mounting groove 131 and is welded to the tool holder 100 by insert welding.

[0047] Understandably, the cutter head 200 and the tool holder 100 are fixed by insert welding, which can ensure the connection strength between the two, enabling the end mill to withstand greater cutting forces and effectively reducing the risk of the cutter head 200 falling off during machining.

[0048] Combination Figure 1 , Figure 2 and Figure 3 Furthermore, the outer wall of the cutter head 200 is provided with a chip removal groove 220 extending from the machining end 210 to the tool holder 100. Specifically, the chip removal groove 220 is provided on the outer wall of the cutter head 200, and penetrates the end face of the machining end 210 and extends toward the tool holder 100. When the end mill cuts the workpiece, the generated chips can be discharged through the chip removal groove 220, which can reduce the accumulation of chips, reduce cutting resistance, improve cutting efficiency, and at the same time reduce the risk of chips scratching the workpiece.

[0049] Furthermore, the machining end 210 is formed with a cutting edge corresponding to the chip removal groove 220. The cutting edge includes a main cutting edge 260 and a chamfering edge 270. The chamfering edge 270 is arranged adjacent to the main cutting edge 260 and the chamfering edge 270 is arranged at an angle to the main cutting edge 260.

[0050] Specifically, the chip removal groove 220 has a chip removal surface 221, and the cutter head 200 also has a first rear cutting surface 230 connected to the side of the chip removal surface 221 away from the handle 100 and disposed opposite to the chip removal surface 221. The first rear cutting surface 230 is disposed at an angle to the chip removal surface 221, and the first rear cutting surface 230 and the chip removal surface 221 cooperate to form the main cutting edge 260.

[0051] like Figure 4 As shown, the angle between the chip removal surface 221 and the rotation center axis of the end mill is β, satisfying: 3°≤β≤8°, where β can be set to 3°, 4°, 5°, 6°, 7°, or 8°, but is not limited to the listed values. Furthermore, the chip removal surface 221 is spaced apart from the rotation center axis of the end mill in the radial direction of the end mill.

[0052] It should be noted that the main cutting edge 260 is set perpendicular to the rotation center axis of the end mill.

[0053] Combination Figure 3 and Figure 4 Furthermore, the angle between the cutting plane of the first flank face 230 and the main cutting edge 260 is α1, which satisfies: 28°≤α1≤32°.

[0054] Specifically, α1 is also the angle of the first back angle of the main cutting edge 260. The value of α1 can be set to 28°, 29°, 30°, 31°, or 32°, but is not limited to the listed values.

[0055] Combination Figure 2 and Figure 3Furthermore, the cutter head 200 also has a second rear cutting surface 240 connected to the side of the chip removal surface 221 away from the handle 100 and disposed opposite to the chip removal surface 221. The second rear cutting surface 240 is disposed at an angle to the chip removal surface 221, and the second rear cutting surface 240 and the chip removal surface 221 cooperate to form a chamfering edge 270. The chamfering edge 270 is disposed adjacent to the main cutting edge 260, and the chamfering edge 270 is disposed at an angle to the main cutting edge 260.

[0056] Specifically, the second flank face 240 and the first flank face 230 are arranged adjacent to each other on the side length direction of the edge of the chip removal groove 220 away from the handle 100. The second flank face 240 and the chip removal groove 220 cooperate to form a chamfering edge 270. The chamfering edge 270 and the main cutting edge 260 are not on the same straight line, but at a certain angle.

[0057] The angle between the chamfering edge 270 and the main cutting edge 260 can be between 100° and 150°. For example, 100°, 110°, 120°, 130°, 140°, 150°, but not limited to the listed values.

[0058] It should be noted that the back angle of the chamfering edge 270 can be between 28° and 32°. For example, 28°, 29°, 30°, 31°, and 32°, but it is not limited to the listed values.

[0059] It is understandable that the end mill can use either the main cutting edge 260 to machine the workpiece or the chamfering edge 270 to chamfer the workpiece. The main cutting edge 260 can also chamfer the workpiece. Therefore, the end mill of this invention can flexibly switch between using the main cutting edge 260 or the chamfering edge 270 to chamfer the workpiece, making machining convenient.

[0060] Combination Figure 2 and Figure 3 In some embodiments, the cutter head 200 also has a third rear cutting surface 250 connected to the side of the first rear cutting surface 230 away from the main cutting edge 260 and disposed opposite to the chip removal groove 220. The third rear cutting surface 250 is set at an angle to the first rear cutting surface 230, wherein the second rear cutting surface 240 plays a role in preventing air from entering.

[0061] Furthermore, the angle between the cutting plane of the third flank face 250 and the main cutting edge 260 is α2, which satisfies: α2>α1.

[0062] Specifically, α2 is also the angle of the second back angle of the main cutting edge 260, where 43°≤α2≤47°. The value of α2 can be set to 43°, 44°, 45°, 46°, or 47°, but is not limited to the listed values.

[0063] like Figure 3As shown, it should be noted that the cutter head 200 is provided with multiple chip removal grooves 220 arranged along the circumference of the end mill, and each chip removal groove 220 is correspondingly provided with a cutting edge. In this way, the cutting capability can be improved.

[0064] Specifically, in this embodiment, there are two chip removal grooves 220, which are symmetrically arranged along a plane passing through the rotation center axis of the end mill. Each chip removal groove 220 is also provided with a cutting edge.

[0065] The manufacturing process of the end mill of this utility model is as follows:

[0066] Machining with the help of a lathe Figure 5 The tool holder blank shown;

[0067] Insert the cutter blank into the mounting groove 131 of the cutter shank blank and weld it;

[0068] Clamp the tool holder blank to make the center hole for shank positioning, and then rough and finish turn the outer circle of the tool holder blank.

[0069] The tool holder 100 is machined using an external cylindrical grinding machine until the outer diameter is within acceptable limits;

[0070] A CNC universal tool grinder is used to open chip removal grooves 220 on the tool blank until its surface roughness is qualified;

[0071] The second flank face 240 is machined using a CNC universal tool to achieve the cutting function;

[0072] The first flank face 230 and the third flank face 250 are machined with the help of a CNC universal tool to achieve the cutting function;

[0073] Machining the flat surface 132 on the positioning table 130;

[0074] Machining threaded connection section 110.

[0075] This utility model also provides a machine tool, including a spindle and an end mill as described in the above embodiment, wherein the spindle is provided with a threaded hole, and the threaded connection section 110 of the end mill passes through the threaded hole.

[0076] This end mill is compatible with machine tools where the spindle's tool connection portion has a threaded hole. The end mill can machine the workpiece using either the main cutting edge 260 or the chamfering edge 270, where the main cutting edge 260 can also chamfer the workpiece. Thus, this end mill allows for flexible switching between the main cutting edge 260 and the chamfering edge 270 for chamfering, offering convenient processing and a wide range of applications. Furthermore, during cutting, the chips generated can be discharged through the chip vent 220, reducing chip accumulation, lowering cutting resistance, improving cutting efficiency, and minimizing the risk of chips scratching the workpiece.

[0077] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0078] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An end mill characterized by, include: The tool holder has a threaded connection section; A cutting head is connected to one end of the tool holder. The end of the cutting head away from the tool holder is the machining end. The outer wall of the cutting head is provided with a chip removal groove extending from the machining end to the tool holder. The machining end is formed with a cutting edge corresponding to the chip removal groove. The cutting edge includes a main cutting edge and a chamfering edge disposed adjacent to the main cutting edge. The chamfering edge is disposed at an angle to the main cutting edge.

2. The end mill according to claim 1, characterized in that The chip removal groove has a chip removal surface, and the cutter head also has a first rear cutting surface connected to the side of the chip removal surface away from the handle and disposed opposite to the chip removal surface. The first rear cutting surface and the chip removal surface cooperate to form the main cutting edge. The cutter head also has a second rear cutting surface connected to the side of the chip removal surface away from the handle and disposed opposite to the chip removal surface, the second rear cutting surface cooperating with the chip removal surface to form the chamfering edge.

3. The end mill according to claim 2, wherein The cutter head also has a third rear cutting surface connected to the side of the first rear cutting surface away from the main cutting edge and disposed opposite to the chip removal surface.

4. The end mill according to claim 3, wherein The angle between the first flank face and the cutting plane of the main cutting edge is α1, and the angle between the third flank face and the cutting plane of the main cutting edge is α2; satisfying: α2>α1.

5. The end mill according to claim 4, wherein 28°≤α1≤32°；43°≤α2≤47°。 6. The end mill according to claim 2, wherein The chip removal surface is set at an angle to the rotation center axis of the end mill.

7. The end mill according to claim 2, wherein The angle between the chip removal surface and the rotation center axis of the end mill is β, which satisfies: 3°≤β≤8°.

8. The end mill of claim 1, wherein, The cutter head is provided with a plurality of chip removal grooves arranged along the circumference of the end mill, and each chip removal groove is provided with a corresponding cutting edge.

9. The end mill of claim 1, wherein, One end of the tool holder is provided with a mounting groove, and the end of the tool tip away from the processing end passes through the mounting groove. The tool tip is welded to the tool holder.

10. A machine tool, characterized by include: The spindle is equipped with a threaded hole; The end mill according to any one of claims 1 to 9, wherein the threaded connection section passes through the threaded hole.

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