Chamfer milling cutter

Abstract

A chamfer milling cutter comprises a cutter handle and a cutting portion arranged at one end of the cutter handle, the cutting portion comprises three spiral cutting edges and sleeking edges, the spiral cutting edges and the sleeking edges are distributed in the circumferential direction and used for cutting workpieces, a chip containing groove is formed between every two adjacent spiral cutting edges, and the included angles between the three spiral cutting edges are not equal. And the sleeking edge is arranged on one side of the corresponding spiral cutting edge and is used for polishing a workpiece cut by the spiral cutting edge. According to the chamfering milling cutter, the included angles among the three spiral cutting edges are unequal, the resonance influence of the chamfering milling cutter and a machine table can be reduced, machining resistance is effectively dispersed, and therefore the service life of the chamfering milling cutter is prolonged. The sleeking edge is arranged on one side of each spiral cutting edge, the sleeking edges can improve the impact resistance of the spiral cutting edges and reduce the surface roughness of a workpiece, the tool lines on the surface of the workpiece are improved, and therefore the machining quality of the workpiece is improved.

Description

Technical Field

[0001] The present application relates to the technical field of tooling, and in particular to a chamfering milling cutter. Background Art

[0002] After hot drilling of titanium, the chamfered surface of the hot-drilled hole needs to be high-gloss chamfered. Due to the changes in the internal material of titanium after hot drilling, the Vickers hardness of titanium increases, which will cause the cutting edge of the chamfering tool to wear during cutting and produce serious knife marks on the titanium, such as vertical lines and haziness, resulting in low processing quality of the processed titanium. Utility Model Content

[0003] In view of this, it is necessary to provide a chamfering milling cutter that can improve the tool marks and improve the workpiece processing quality.

[0004] An embodiment of the present application provides a chamfer milling cutter, comprising a shank and a cutting portion arranged at one end of the shank, the cutting portion comprising three spiral cutting edges and a wiper edge distributed along the circumferential direction for cutting a workpiece, a chip groove is provided between two adjacent spiral cutting edges, the angles between the three spiral cutting edges are not equal, the wiper edge is provided on one side of the corresponding spiral cutting edge, and is used for grinding the workpiece cut by the spiral cutting edge.

[0005] The above-mentioned spiral cutting edge is arranged in a spiral shape so that the blade can gradually cut into and away from the workpiece to make the cutting smooth and light. The spiral blade can also allow the chip groove to be arranged in a corresponding spiral shape. The spiral chip groove can achieve a better chip removal effect and reduce the risk of chips cutting the workpiece surface for the second time. By making the angles between the three spiral cutting edges unequal, the resonance effect between the chamfering cutter and the machine can be reduced, and the processing resistance can be effectively dispersed, thereby increasing the service life of the chamfering cutter. By arranging a finishing blade on one side of each spiral cutting edge, the finishing blade can increase the impact resistance of the spiral cutting edge and reduce the surface roughness of the workpiece, thereby improving the knife marks on the workpiece surface and improving the processing quality of the workpiece.

[0006] In some embodiments, the difference in included angles between every two adjacent spiral cutting edges is equal.

[0007] In some embodiments, the cutting portion further includes a rake face and a flank face connected to the rake face, the wiper edge is provided at an end of the rake face away from the flank face, and the spiral cutting edge is formed between the rake face and the wiper edge.

[0008] In some embodiments, the width of the wiper edge at one end close to the tool handle axis is smaller than the width of the wiper edge at one end away from the tool handle axis.

[0009] In some embodiments, three avoidance grooves are respectively provided at one end of the cutting portion away from the tool handle, and the three avoidance grooves are connected to each other and are respectively connected to the three chip grooves one by one.

[0010] In some embodiments, the shank includes a mounting section and a transition section, wherein two ends of the transition section are respectively connected to the mounting section and the cutting portion, and an outer diameter of the transition section gradually decreases from one end adjacent to the mounting section toward one end adjacent to the cutting portion.

[0011] In some embodiments, the cutting portion has a conical structure at one end away from the tool handle, and the cone angle of the conical structure is an obtuse angle.

[0012] In some embodiments, a diameter of an end of the tapered structure away from the tool handle is smaller than a diameter of an end of the tapered structure close to the tool handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the three-dimensional structure of a chamfer milling cutter provided in one embodiment of the present application.

[0014] Figure 2 yes Figure 1 The chamfer milling cutter is shown in a schematic three-dimensional structure at an angle.

[0015] Figure 3 yes Figure 1 The three-dimensional structure schematic diagram of the chamfer milling cutter at another angle is shown.

[0016] Main component symbols

[0017] Chamfering cutter 100

[0018] Handle 10

[0019] Installation Section 11

[0020] Transition 12

[0021] Cutting part 20

[0022] Spiral cutting edge 21

[0023] Wiper 22

[0024] Chip groove 23

[0025] Rake face 24

[0026] Flank 25

[0027] Avoidance slot 26 DETAILED DESCRIPTION

[0028] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0029] In the description of the present application, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, in the description of the present application, it should be noted that the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0030] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0032] See also Figure 1 An embodiment of the present application provides a chamfer milling cutter 100 that can be used for chamfering a workpiece (not shown), especially a frame-type workpiece. The chamfer milling cutter 100 includes a shank 10 and a cutting portion 20 .

[0033] The tool handle 10 is usually used to be clamped and installed on a device for cutting, and the cutting portion 20 is provided at one end of the tool handle 10. The cutting portion 20 and the tool handle 10 are integrally formed. Of course, in other embodiments, the cutting portion 20 and the tool handle 10 can also be connected by welding, screwing, etc. The cutting portion 20 includes three spiral cutting edges 21 and a wiper edge 22 distributed along the circumferential direction for cutting the workpiece. The spiral cutting edge 21 extends spirally around the axis L of the chamfering milling cutter 100. A chip groove 23 is provided between two adjacent spiral cutting edges 21. The angles between the three spiral cutting edges 21 are not equal. The wiper edge 22 is provided on one side of the corresponding spiral cutting edge 21 for grinding the workpiece cut by the spiral cutting edge 21.

[0034] The spiral cutting edge 21 in the chamfering cutter 100 of the embodiment of the present application is arranged in a spiral shape, so that the blade can gradually cut into and cut away from the workpiece, so that the cutting becomes smooth and light. The spiral blade can also allow the chip groove 23 to be arranged in a spiral shape accordingly. The spiral chip groove 23 can achieve a better chip removal effect and reduce the risk of chips cutting the workpiece surface for the second time. By making the angles between the three spiral cutting edges 21 unequal, the resonance effect between the chamfering cutter 100 and the machine can be reduced, and the processing resistance can be effectively dispersed, thereby increasing the service life of the chamfering cutter 100. By arranging a finishing edge 22 on one side of each spiral cutting edge 21, the finishing edge 22 can increase the impact resistance of the spiral cutting edge 21 and reduce the surface roughness of the workpiece, thereby improving the knife marks on the workpiece surface and improving the processing quality of the workpiece.

[0035] In some embodiments, the difference between the angles of each two adjacent spiral cutting edges 21 is equal. Figure 2 As shown, the angles between two adjacent spiral cutting edges 21 are 113°, 120°, and 127°, respectively. Therefore, the difference between the angles between two adjacent spiral cutting edges 21 is 7°. Of course, in other embodiments, the difference between the angles between two adjacent spiral cutting edges 21 can also be other values, such as 6°, but not limited thereto. In this way, during the cutting process, the time for each spiral cutting edge 21 to contact the workpiece can be changed, reducing the resonance effect between the chamfering cutter 100 and the machine, thereby improving the chamfering vertical lines.

[0036] Please also see Figure 1 and Figure 2 In some embodiments, the cutting portion 20 further includes a rake face 24 and a flank face 25 connected to the rake face 24, the wiper edge 22 is disposed at one end of the rake face 24 away from the flank face 25, and the spiral cutting edge 21 is formed between the rake face 24 and the wiper edge 22. In this way, the cutting strength of the spiral cutting edge 21 can be increased, the cutting effect of the spiral cutting edge 21 can be improved, the rake face 24 can participate in cutting the workpiece, and the flank face 25 can dissipate heat and remove chips during cutting.

[0037] In some embodiments, the width of the wiper edge 22 at one end close to the axis L of the tool handle 10 is smaller than the width of the wiper edge 22 at one end away from the axis L of the tool handle 10. In this way, the grinding effect of the wiper edge 22 can be improved.

[0038] In some embodiments, the end of the cutting portion 20 away from the tool handle 10 is further provided with three avoidance grooves 26, which are connected to each other and are respectively connected to the three chip grooves 23. In this way, it is convenient to machine the wiper edge 22 on the chamfering milling cutter 100, and the chips after grinding the wiper edge 22 can be discharged into the chip groove 23 through the avoidance groove 26, so as to avoid the machined surface of the workpiece from becoming hazy.

[0039] See also Figure 3 In some embodiments, the tool handle 10 includes a mounting section 11 and a transition section 12. The mounting section 11 is a columnar structure for clamping. The two ends of the transition section 12 are respectively connected to the mounting section 11 and the cutting portion 20. The outer diameter of the transition section 12 gradually decreases from one end adjacent to the mounting section 11 toward one end adjacent to the cutting portion 20. In some embodiments, the taper angle of the transition section 12 is γ, γ is an acute angle, and the value range of γ can be 28°-32°. In this way, when the chamfer milling cutter 100 is working, due to the effect of the transition section 12, the tool handle 10 can avoid the workpiece, so that the cutting can have a longer working stroke in a narrow space, thereby improving the application range of the chamfer milling cutter 100.

[0040] In some embodiments, the cutting portion 20 is a conical structure at one end away from the handle 10, and the cone angle of the conical structure is β, β is an obtuse angle, and the value range of β can be 125°-127°. In this way, the cutting angle of the spiral cutting edge 21 is good, and has a good cutting effect, so that the finish of the processed workpiece is better.

[0041] Furthermore, the diameter of the end of the tapered structure away from the handle 10 is smaller than the diameter of the end of the tapered structure close to the handle 10. In this way, the strength of the cutting portion 20 can be ensured so that the cutting portion 20 can withstand a larger cutting force.

[0042] In some embodiments, the length of the spiral cutting edge 21 along the axis L of the chamfering cutter 100 is L1, and the value range of L1 is 0.5 mm-0.7 mm. In this way, it can be ensured that the cutting strength of the spiral cutting edge 21 meets the requirements.

[0043] In some embodiments, the length of the cutting portion 20 along the axis L of the chamfering cutter 100 is L2, and the value range of L2 is 2.8 mm-3.2 mm. In this way, not only can the cutting strength of the spiral cutting edge 21 meet the requirements, but also the cutting can have a longer working stroke in a narrow space, thereby improving the application range of the chamfering cutter 100.

[0044] The working process of the chamfer milling cutter 100 in the above embodiment is as follows:

[0045] The mounting section 11 of the tool holder 10 is clamped by a cutting device, and then the mounting section 11 is driven to move to the chamfer hole of the workpiece, thereby sequentially performing rough chamfering, medium chamfering and fine chamfering on the chamfer hole of the workpiece. Since the angles between the three spiral cutting edges 21 are set to be unequal and a finishing edge 22 is set on one side of each spiral cutting edge 21, the contact time of each spiral cutting edge 21 with the workpiece can be changed during the cutting process, thereby reducing the resonance effect between the chamfering cutter 100 and the machine, effectively dispersing the machining resistance, further increasing the service life of the chamfering cutter 100, and improving the chamfer surface quality.

[0046] It is obvious to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present application.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person of ordinary skill in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A chamfering cutter, It is characterized in that The utility model comprises a tool handle and a cutting part arranged at one end of the tool handle, wherein the cutting part comprises three spiral cutting edges and a wiping edge distributed along the circumferential direction for cutting a workpiece, a chip groove is arranged between two adjacent spiral cutting edges, and the angles between the three spiral cutting edges are not equal. The wiping edge is arranged on one side of the corresponding spiral cutting edge and is used for grinding the workpiece cut by the spiral cutting edge.

2. The chamfering cutter according to claim 1, It is characterized in that The difference in the included angles between any two adjacent spiral cutting edges is equal.

3. The chamfering cutter according to claim 1, It is characterized in that The cutting portion further comprises a rake face and a flank face connected to the rake face, the wiper edge is arranged at an end of the rake face away from the flank face, and the spiral cutting edge is formed between the rake face and the wiper edge.

4. The chamfering cutter according to claim 3, It is characterized in that The width of the wiper edge at one end close to the tool handle axis is smaller than the width of the wiper edge at one end away from the tool handle axis.

5. The chamfering cutter according to claim 4, It is characterized in that The cutting portion is further provided with three avoidance grooves at one end away from the tool handle, and the three avoidance grooves are connected to each other and are connected to the three chip grooves one by one.

6. The chamfering cutter according to claim 1, It is characterized in that The tool handle includes a mounting section and a transition section, two ends of the transition section are respectively connected to the mounting section and the cutting portion, and the outer diameter of the transition section gradually decreases from one end adjacent to the mounting section toward one end adjacent to the cutting portion.

7. The chamfering cutter according to claim 1, It is characterized in that The cutting portion has a conical structure at one end away from the tool handle, and the cone angle of the conical structure is an obtuse angle.

8. The chamfering cutter according to claim 7, It is characterized in that The diameter of the tapered structure at one end away from the tool handle is smaller than the diameter of the tapered structure at one end close to the tool handle.

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