Spherical milling cutter

Abstract

The utility model relates to a spherical milling cutter which comprises a cutter handle, a cutter bar and a cutting head, the cutter handle is coaxially arranged at the rear end of the cutter bar, and the cutting head is arranged at the front end of the cutter bar; the cutting head is spherical, and a plurality of blades are detachably mounted on the cutting head; the blades are evenly arranged around the axis of the cutter bar, the outer ends of the blades extend out of the cutting head, and the outer ends of the blades are in an arc shape concentric with the cutting head. According to the spherical milling cutter, the cutter edge is arranged to be spherical, a hemispherical groove can be directly machined on the inner side of a blank only by installing the spherical milling cutter on a three-axis machining device, in addition, the blade can be independently replaced after being damaged, the production cost is reduced, and resource waste is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of milling cutter, specifically relates to a spherical milling cutter. BACKGROUND

[0002] At present, the milling cutter is used for processing the semispherical groove on the inner side of the automobile uncoupling, and the semispherical groove on the inner side of the automobile uncoupling can be processed only after the milling cutter is installed on the five-axis machining equipment, and the posture of the multiple blanks needs to be adjusted during the processing, so that the processing process is relatively complicated.

[0003] In addition, during use, the blades of the milling cutter cut the excess of the workpiece in turn and intermittently, and the blades and the workpiece rub against each other violently, so that the blades are damaged, and the milling cutter needs to be replaced as a whole after the blades are damaged, thereby causing waste of resources. CONTENT OF THE UTILITY MODEL

[0004] Based on the above description, the utility model provides a spherical milling cutter, by setting the cutting edge into a spherical shape, only the spherical milling cutter needs to be installed on the three-axis machining device, and the semispherical groove can be directly processed on the inner side of the blank, in addition, the blades can be replaced individually after being damaged, thereby reducing the production cost and avoiding waste of resources.

[0005] The technical scheme for solving the above technical problem is as follows: a spherical milling cutter, comprising a handle, a rod and a cutting head, the handle is coaxially arranged at the rear end of the rod, and the cutting head is arranged at the front end of the rod; the cutting head is spherical, and a plurality of blades are detachably mounted on the cutting head; the blades are uniformly arranged around the axis of the rod, and the outer ends of the blades extend out of the cutting head, and the outer ends of the blades are in the shape of a circular arc concentric with the cutting head.

[0006] On the basis of the above technical scheme, the utility model can also be improved as follows.

[0007] Further, the side wall of the cutting head is uniformly provided with mounting grooves corresponding to the blades one by one, and a pressing block is further arranged in each mounting groove; one side wall of the mounting groove is a mounting surface, the blades are tightly attached to the mounting surface, and the pressing block tightly presses the side of the blades away from the mounting surface; a through hole is further arranged on the cutting head and communicates with the side of the mounting groove away from the mounting surface, a bolt is screwedly arranged in the through hole and abuts against the side of the pressing block away from the blades.

[0008] Further, the included angle between the mounting surface and the side profile of the cutting head is 45°, so that the width of the mounting groove gradually increases from inside to outside.

[0009] Further, the installation surface is uniformly provided with a plurality of first corrugated grooves, the extension direction of the first corrugated grooves is parallel to the axis of the cutter bar; the side of the blade close to the installation surface is uniformly provided with a plurality of second corrugated grooves, the second corrugated grooves are matched with the first corrugated grooves.

[0010] Further, the pressing block is wedge-shaped, and the width of the pressing block gradually increases from the outside of the installation groove to the inside of the installation groove.

[0011] Further, the side of the pressing block away from the blade is provided with a counterbore matched with the bolt, and the end of the bolt is inserted into the counterbore.

[0012] Further, the side of each installation groove away from the installation surface is provided with at least two through holes.

[0013] Further, the end of the bolt away from the pressing block is sunk into the counterbore.

[0014] Further, the side wall of the cutter handle is uniformly provided with a plurality of spline grooves around the axis, and the extension direction of the spline grooves is parallel to the axis of the cutter handle.

[0015] Further, the diameter of the cutter bar gradually decreases from the rear to the front.

[0016] Compared with the prior art, the technical scheme of the present application has the following beneficial technical effects:

[0017] 1. According to the utility model, the cutting edge is arranged in a spherical shape, the spherical milling cutter is only needed to be installed on a three-axis machining device, and a hemispherical groove can be machined on the inner side of a blank directly;

[0018] 2. By arranging the replaceable blade, the blade can be replaced individually after being damaged, production cost is reduced, and resource waste is avoided;

[0019] 3. By matching the first corrugated groove and the second corrugated groove, when the blade is slightly worn, the blade can be pulled out by a certain length without replacing the blade, and production cost and resource waste are further reduced. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A structure schematic view of a spherical milling cutter is provided for the utility model embodiment;

[0021] Figure 2 A structure schematic view of a cutting head is provided for the utility model embodiment; Figure 1 A structure schematic view from another perspective;

[0022] Figure 3 A structure schematic view of a cutting head is provided for the utility model embodiment;

[0023] Figure 4The utility model discloses a structure schematic view of the blade in the embodiment of the utility model.

[0024] Figure 5 The utility model discloses a structure schematic view of the pressure block in the embodiment of the utility model.

[0025] In the drawings, the component list that each sign represents is as follows:

[0026] 1, handle of knife;11, spline groove;2, knife bar;3, cutting head;31, installation groove;32, installation face;33, first corrugated groove;34, through -hole;4, blade;41, second corrugated groove;5, pressure block;51, counterbore;6, bolt. Specific implementation

[0027] In order to facilitate understanding the present application, the present application will be described more fully below with reference to the accompanying drawings. The embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0029] It can be understood that spatially relative terms, such as "beneath", "below", "lower", "under", "above", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device in the figures is inverted, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device can also be oriented in the other direction (e.g., rotated 90 degrees or at other orientations) and the included spatially relative terms be interpreted accordingly. It will also be understood that the terms "first", "second", "third", etc. are used herein, if any, merely for purposes of description and are not intended to indicate or imply a relative importance or significance.

[0030] A ball milling cutter, comprising a handle 1, a knife bar 2 and a cutting head 3, the handle 1 is coaxially arranged at the rear end of the knife bar 2, and the cutting head 3 is arranged at the front end of the knife bar 2. The diameter of the knife bar 2 gradually decreases from rear to front. A plurality of spline grooves 11 are uniformly arranged on the side wall of the handle 1 around the axis, and the extension direction of the spline grooves 11 is parallel to the axis of the handle 1, so as to facilitate the installation of the handle 1 on a three-axis machining device.

[0031] In this embodiment, the cutting head 3 is spherical and has a plurality of blades 4 detachably mounted thereon. The blades 4 are evenly arranged around the axis of the cutter bar 2, and the outer ends of the blades 4 extend out of the cutting head 3 and are in the shape of an arc concentric with the cutting head 3.

[0032] In this embodiment, by setting the cutting edge into a spherical shape, it is only necessary to install the spherical milling cutter on a three-axis machining device, and the hemispherical groove can be directly machined on the inner side of the blank. In addition, the blade 4 can be replaced separately after being damaged, reducing production costs and avoiding waste of resources.

[0033] Specifically, the sidewalls of the cutting head 3 are uniformly provided with mounting slots 31 corresponding one to each blade 4. A pressure block 5 is also positioned within each mounting slot 31. One sidewall of the mounting slot 31 serves as a mounting surface 32, against which the blade 4 abuts, while the pressure block 5 compresses the side of the blade 4 facing away from the mounting surface 32. The cutting head 3 also has a through hole 34 connecting to the side of the mounting slot 31 facing away from the mounting surface 32. The through hole 34 is internally threaded with a thread 6, which abuts against the side of the pressure block 5 facing away from the blade 4.

[0034] Furthermore, each mounting groove 31 is provided with at least two through holes 34 on the side away from the mounting surface 32. The side of the pressing block 5 away from the blade 4 is provided with a countersunk hole 51 that matches the blade 6 one-to-one. The end of the blade 6 near the pressing block 5 is inserted into the countersunk hole 51, and the end of the blade 6 away from the pressing block 5 is sunk into the countersunk hole 51.

[0035] The angle between mounting surface 32 and the side profile of cutting head 3 is 45°, causing the width of mounting slot 31 to gradually increase from the inside to the outside. The force exerted by pressure block 5 on blade 4 pushes blade 4 inward, ensuring a more stable installation of blade 4. Pressure block 5 is wedge-shaped, and its width also gradually increases from the outside of mounting slot 31 to the inside.

[0036] When the blade 4 is damaged, the blade 4 can be replaced separately, which reduces production costs and avoids waste of resources.

[0037] Furthermore, a plurality of first corrugated grooves 33 are evenly distributed on the mounting surface 32, extending parallel to the axis of the shank 2. A plurality of second corrugated grooves 41 are evenly distributed on the side of the blade 4 closest to the mounting surface 32, matching the first corrugated grooves 41 with the first corrugated grooves 33. The coordination of the first corrugated grooves 33 and the second corrugated grooves 41 allows the blade 4 to be extended to a certain length when slightly worn, eliminating the need for blade replacement, further reducing production costs and resource waste.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A ball end mill characterized by, The tool comprises a handle, a shank and a cutting head, the handle is coaxially arranged at the rear end of the shank, and the cutting head is arranged at the front end of the shank; the cutting head is spherical, and a plurality of blades are detachably arranged on the cutting head; the blades are uniformly arranged around the axis of the shank, and the outer ends of the blades are arranged in the form of a circular arc concentric with the cutting head.

2. A ball cutter according to claim 1, wherein A mounting groove corresponding to each blade is uniformly arranged on the side wall of the cutting head, and a pressing block is further arranged in each mounting groove; one side wall of the mounting groove is a mounting surface, the blade is tightly attached to the mounting surface, and the pressing block presses the side of the blade away from the mounting surface; a through hole is further arranged on the cutting head and communicates with the side of the mounting groove away from the mounting surface, a bolt is screwedly arranged in the through hole, and the bolt abuts against the side of the pressing block away from the blade.

3. A ball cutter according to claim 2, wherein The included angle between the mounting surface and the side profile of the cutting head is 45°, so that the width of the mounting groove gradually increases from the inside to the outside.

4. A ball cutter according to claim 2 wherein, A plurality of first corrugated grooves are uniformly arranged on the mounting surface, and the extension direction of the first corrugated grooves is parallel to the axis of the shank; a plurality of second corrugated grooves are uniformly arranged on the side of the blade close to the mounting surface, and the second corrugated grooves are matched with the first corrugated grooves.

5. A ball cutter according to claim 2 wherein, The pressing block is wedge-shaped, and the width of the pressing block gradually increases from the outside of the mounting groove to the inside of the mounting groove.

6. A ball cutter according to claim 2 wherein, A counterbore matched with the bolt is arranged on the side of the pressing block away from the blade, and the end of the bolt is inserted into the counterbore.

7. A ball cutter according to claim 2 wherein, At least two through holes are arranged on the side of each mounting groove away from the mounting surface.

8. A ball cutter according to claim 6 wherein, The end of the bolt away from the pressing block is sunken into the counterbore.

9. A ball cutter according to claim 1 wherein, A plurality of spline grooves are uniformly arranged on the side wall of the handle around the axis, and the extension direction of the spline grooves is parallel to the axis of the handle.

10. The ball cutter according to claim 1, wherein The diameter of the shank gradually decreases from the rear to the front.

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