CN214640520U - Ball head cutter - Google Patents

Abstract

The application discloses bulb cutter, including handle of a knife and the tool bit that is connected, the preceding terminal surface of tool bit is the plane. The tool bit includes first cutting edge, the second cutting edge, the third cutting edge, first convex body, the second convex body, third convex body and chip groove, first cutting edge, second cutting edge and third cutting edge set gradually along the circumference of handle of a knife, first cutting edge, second cutting edge and third cutting edge intersect in a shared central plane, first cutting edge, the one side that the tool bit center pin was kept away from to second cutting edge and third cutting edge is the arcwall face, first cutting edge is located to first convex body, the second cutting edge is located to the second convex body, the third cutting edge is located to the third convex body, first convex body, the one side that the tool bit center pin was kept away from to second convex body and third convex body is the arcwall face, the chip groove is located first cutting edge, between second cutting edge and the third cutting edge. The first cutting edge, the second cutting edge and the third cutting edge share one central plane, the three cutting edges can mill a plane for a workpiece, and the first boss, the second boss and the third boss can mill a curved surface for the workpiece.

Description

Ball head cutter

Technical Field

The application relates to the technical field of cutter processing, in particular to a ball head cutter.

Background

When a curved surface and a plane are machined by using the cutter, a single curved surface cutter is generally adopted for curved surface machining, then a single plane cutter is utilized for plane machining, or sequential multiple matching is carried out according to specific requirements, for example, a ball end mill is utilized when the curved surface is machined, and an end face mill is utilized when the plane is machined. However, during operation, the straight-surface tool and the curved-surface tool need to be replaced, so that the machining efficiency is low, and certain machining risks exist.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need for a ball end cutter to solve the above problems.

An embodiment of the application provides a bulb cutter, including handle of a knife and the tool bit that is connected, bulb cutter has a center pin, just the preceding terminal surface of tool bit is the plane. The cutter head includes:

the cutter comprises a cutter handle, a first cutting edge, a second cutting edge and a third cutting edge, wherein the first cutting edge, the second cutting edge and the third cutting edge are arranged at the front end of the cutter handle in sequence along the circumferential direction of the cutter handle, the first cutting edge, the second cutting edge and the third cutting edge are intersected on a common central plane, and the surfaces, far away from the central axis of the cutter head, of the first cutting edge, the second cutting edge and the third cutting edge are arc-shaped surfaces;

the first convex body, the second convex body and the third convex body are respectively arranged on the first cutting edge, the second cutting edge and the third cutting edge, and the surfaces, far away from the central axis of the tool bit, of the first convex body, the second convex body and the third convex body are all arc surfaces;

chip grooves are formed among the first cutting edge, the second cutting edge and the third cutting edge.

In one embodiment, each of the first, second and third cutting edges comprises a first rake surface, a first flank surface, a second flank surface and a third flank surface, and the first rake surfaces of the first, second and third cutting edges and the central surface comprise a front end surface of the insert.

In one embodiment, a first transition groove is formed between the first side blade surface and the adjacent third side blade surface, the first transition groove extends along the central axis direction, and the first side blade surface, the third side blade surface and the first transition groove form the chip groove.

In one embodiment, the flutes are helical in configuration.

In one embodiment, the flute has a helix angle in the range of 25 ° to 28 °.

In one embodiment, the first convex body, the second convex body and the third convex body are all provided on the second side face, and each of the first convex body, the second convex body and the third convex body is composed of a second rake face, a first flank face, a second flank face, a third flank face and a fourth flank face, the second rake face and the fourth flank face are disposed opposite to each other, and the first flank face and the third flank face are disposed opposite to each other.

In one embodiment, the second rake face, the first flank face, the second flank face, the third flank face and the fourth flank face are all arc-shaped faces, and the second rake face and the fourth flank face are all equal, and the first flank face and the third flank face are all equal.

In one embodiment, the diameter D of the circumcircle where the front end surface of the cutter head is located satisfies: d is larger than or equal to 6mm, and the radius r of the circle where the second front cutter face and the fourth rear cutter face are located meets the following requirements: r is less than 0.1 mm.

In one embodiment, an inclined surface is arranged between the outer surface of the handle and the second side tool surface, and an included angle a formed by the inclined surface and the second side tool surface satisfies: a is more than or equal to 25 degrees and less than or equal to 45 degrees.

In an embodiment, a second transition groove is arranged between the inclined surface and the second flank surface.

In this embodiment, the first cutting edge, the second cutting edge and the third cutting edge which are arranged at the front end of the knife handle share one central plane, and the three cutting edges can achieve the effect of synchronously milling the same plane of the workpiece. Furthermore, the first cutting edge, the second cutting edge and the third cutting edge are respectively provided with a first convex body, a second convex body and a third convex body, one surface of the first convex body, one surface of the second convex body and one surface of the third convex body, which are far away from the central shaft of the tool bit, are arc-shaped surfaces, and curved surfaces can be milled on a workpiece by utilizing the arranged first boss, the second boss and the third boss. Therefore, the ball head cutter in the embodiment can be used for milling a curved surface and a plane on a workpiece. Meanwhile, chip removal grooves formed among the first cutting edge, the second cutting edge and the third cutting edge can remove chips generated in the process of milling the workpiece.

Drawings

Fig. 1 is a schematic structural diagram of a ball head cutter in an embodiment of the present application.

Fig. 2 is a partial structural schematic diagram of a first angle of the ball head cutter in an embodiment of the present application.

Fig. 3 is a partial structural schematic diagram of a second angle of the ball nose tool in an embodiment of the present application.

Description of the main elements

Ball head cutter 10

Knife handle 110

Tool bit 120

Center shaft 102

Front end face 1200

First blade 1210

Second blade 1220

Third cutting edge 1230

The central surface 1234

First convex body 1240

Second convex body 1250

Third convex body 1260

Chip groove 1270

First rake surface 1201

First flank surface 1202

Second flank surface 1203

The third flank 1204

First transition groove 1205

Second rake surface 1211

First clearance face 1212

Second relief surface 1213

Third flank surface 1214

Fourth clearance surface 1215

Inclined plane 1101

Second transition groove 1102

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

Referring to fig. 1, an embodiment of the present application provides a ball-end tool 10 for milling curved surfaces and flat surfaces, the ball-end tool 10 includes a shank 110 and a tool tip 120 connected together, the ball-end tool 10 has a central axis 102, and a front end face 1200 of the tool tip 120 is a flat surface.

The tool bit 120 comprises a first cutting edge 1210, a second cutting edge 1220, a third cutting edge 1230, a first convex body 1240 arranged on the first cutting edge 1210, a second convex body 1250 arranged on the second cutting edge 1220, and a third convex body 1260 arranged on the third cutting edge 1230, wherein the first convex body 1240 is positioned between the front end face 1200 and the tool handle 110, the second convex body 1250 is positioned between the front end face 1200 and the tool handle 110, the third convex body 1260 is positioned between the front end face 1200 and the tool handle 110, and chip discharge grooves 1270 are formed among the first cutting edge 1210, the second cutting edge 1220 and the third cutting edge 1230.

In an embodiment, the first cutting edge 1210, the second cutting edge 1220, and the third cutting edge 1230 are disposed at the front end of the handle 110, the first cutting edge 1210, the second cutting edge 1220, and the third cutting edge 1230 are sequentially disposed along the circumferential direction of the handle 110, the first cutting edge 1210, the second cutting edge 1220, and the third cutting edge 1230 intersect at a common central plane 1234, the surfaces of the first cutting edge 1210, the second cutting edge 1220, and the third cutting edge 1230, which are far away from the central axis 102 of the tool bit 120, are all arc surfaces, and the surfaces of the first protrusion 1260, the second protrusion 1250, and the third protrusion 1260, which are far away from the central axis 102 of the tool bit 120, are all arc surfaces.

In this embodiment, the first cutting edge 1210, the second cutting edge 1220 and the third cutting edge 1230, which are disposed at the front end of the tool holder 110, share a central plane 1234, and the three cutting edges can achieve the effect of synchronously milling the same plane of the workpiece. Furthermore, the first cutting edge 1210, the second cutting edge 1220 and the third cutting edge 1230 are respectively provided with a first convex body 1240, a second convex body 1250 and a third convex body 1260, and one surfaces of the first convex body 1240, the second convex body 1250 and the third convex body 1260, which are far away from the central axis 102 of the tool bit 120, are arc-shaped surfaces, and curved surfaces can be milled on a workpiece by using the first convex body 1240, the second convex body 1250 and the third convex body 1260. Thus, the ball head cutter 10 in the embodiment can mill a workpiece to have two effects of a curved surface and a plane. At the same time, the chip groove 1270, which is located between the first, second and third cutting edges 1210, 1220 and 1230, may discharge chips generated during milling of the workpiece.

Referring to fig. 1 and fig. 2, in an embodiment, the first cutting edge 1210, the second cutting edge 1220 and the third cutting edge 1230 are respectively composed of a first rake surface 1201, a first flank surface 1202, a second flank surface 1203 and a third flank surface 1204, and the first rake surface 1201 and the central surface 1234 of the first cutting edge 1210, the second cutting edge 1220 and the third cutting edge 1230 form the front end surface 1200 of the tool tip 120.

In one embodiment, a first transition groove 1205 is formed between the first flank surface 1202 and the adjacent third flank surface 1204, the first transition groove 1205 extends along the central axis 102, and the first flank surface 1202, the third flank surface 1204 and the first transition groove 1205 form a chip groove 1270.

The arrangement of the first transition groove 1205 can increase the capacity of containing chips in the chip discharge groove 1270 in the machining process, and meanwhile, a step-shaped structure is formed between the first transition groove 1205 and the first side tool face 1202 and the third side tool face 1204, so that the chips contained in the chip discharge groove 1270 can be crushed for the second time, and the probability of blocking the chip discharge groove 1270 caused by dense and agglomerated chips is reduced.

In one embodiment, the flutes 1270 are helical to facilitate smooth discharge of debris. It will be appreciated that in other embodiments, the flutes 1270 may also be configured according to the particular shape of the cutting edge.

In one embodiment, the flute 1270 has a helix angle in the range of 25 ° to 28 °, and the above parameters are used to facilitate the machining of the ball nose cutter 10 while meeting the strength requirements between the cutting edges.

In one embodiment, the first protrusion 1240, the second protrusion 1250, and the third protrusion 1260 are all disposed on the second side surface 1203, the first protrusion 1240, the second protrusion 1250, and the third protrusion 1260 are all composed of a second rake surface 1211, a first relief surface 1212, a second relief surface 1213, a third relief surface 1214, and a fourth relief surface 1215, the second rake surface 1211 is disposed opposite to the fourth relief surface 1215, and the first relief surface 1212 is disposed opposite to the third relief surface 1214. Thus, the first protrusion 1240, the second protrusion 1250, and the third protrusion 1260 may be formed to mill a curved surface.

In one embodiment, the first relief surface 1212 is continuous with the first flank surface 1202, i.e., the first relief surface 1212 is continuous with the first flank surface 1202, and the third relief surface 1214 is continuous with the third flank surface 1204, i.e., the third relief surface 1214 is continuous with the third flank surface 1204.

In one embodiment, the second rake surface 1211, the first relief surface 1212, the second relief surface 1213, the third relief surface 1214 and the fourth relief surface 1215 are all arcuate surfaces, and the second rake surface 1211 and the fourth relief surface 1215 are congruent, and the first relief surface 1212 and the third relief surface 1214 are congruent. Thus, the processing of the first protrusions 1240, the second protrusions 1250, and the third protrusions 1260 is facilitated.

Referring to fig. 3, in an embodiment, the diameter D of the circumscribed circle of the front end face 1200 of the tool tip 120 satisfies: d is more than or equal to 6mm, the strength of the cutter head 120 is ensured, and the radius r of a circle where the second rake surface 1211 and the fourth relief surface 1215 are located satisfies the following condition: r is less than 0.1mm, and the connection strength of the first convex body 1240, the second convex body 1250 and the third convex body 1260 and the second side surface 1203 is ensured.

In an embodiment, an inclined surface 1101 is arranged between the outer surface of the tool shank 110 and the second flank surface 1203, and an included angle a formed between the inclined surface 1101 and the second flank surface 1203 satisfies: a is more than or equal to 25 degrees and less than or equal to 45 degrees. Therefore, the tool holder 110 and the tool bit 120 have strong connectivity, and simultaneously, the angle ranges required when the first convex body 1240, the second convex body 1250 and the third convex body 1260 mill a curved surface are met.

In an embodiment, a second transition groove 1102 is provided between the inclined surface 1101 and the second flank surface 1203. The buffering effect on chips generated in the process of milling the workpiece by the ball head cutter 10 is facilitated in the discharging process, and meanwhile, the processing of the chip discharge groove 1270 is facilitated.

It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present application and not for limiting, and although the present application is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present application without departing from the spirit and scope of the technical solutions of the present application.

Claims (10)

1. The utility model provides a bulb cutter, includes handle of a knife and the tool bit that is connected, its characterized in that, bulb cutter has a center pin, just the preceding terminal surface of tool bit is the plane, the tool bit includes:

the cutter comprises a cutter handle, a first cutting edge, a second cutting edge and a third cutting edge, wherein the first cutting edge, the second cutting edge and the third cutting edge are arranged at the front end of the cutter handle in sequence along the circumferential direction of the cutter handle, the first cutting edge, the second cutting edge and the third cutting edge are intersected on a common central plane, and the surfaces, far away from the central axis of the cutter head, of the first cutting edge, the second cutting edge and the third cutting edge are arc-shaped surfaces;

the first convex body, the second convex body and the third convex body are respectively arranged on the first cutting edge, the second cutting edge and the third cutting edge, and the surfaces, far away from the central axis of the tool bit, of the first convex body, the second convex body and the third convex body are all arc surfaces;

and the chip groove is formed among the first cutting edge, the second cutting edge and the third cutting edge.

2. The ball nose tool of claim 1, wherein the first, second, and third cutting edges are each comprised of a first rake surface, a first flank surface, a second flank surface, and a third flank surface, the first rake surfaces of the first, second, and third cutting edges and the central surface comprising a front end surface of the insert.

3. The ball nose tool according to claim 2, wherein a first transition groove is provided between the first flank face and the adjacent third flank face, the first transition groove extending in the central axis direction, and the first flank face, the third flank face and the first transition groove forming the chip groove.

4. The ball nose tool of claim 3, wherein the flutes are of helical configuration.

5. The ball nose tool of claim 4, wherein the flute has a helix angle in the range of 25 ° to 28 °.

6. The ball nose tool of claim 2, wherein the first, second, and third protrusions are provided on the second side surface, and wherein the first, second, and third protrusions each comprise a second rake surface, a first flank surface, a second flank surface, a third flank surface, and a fourth flank surface, the second rake surface being disposed opposite the fourth flank surface, and the first flank surface being disposed opposite the third flank surface.

7. The ball nose tool according to claim 6, wherein the second rake face, the first flank face, the second flank face, the third flank face, and the fourth flank face are all arc-shaped faces, and the second rake face and the fourth flank face are congruent, and the first flank face and the third flank face are congruent.

8. The ball nose tool according to claim 7, wherein a diameter D of a circumscribed circle on the front end surface of the tool bit satisfies: d is larger than or equal to 6mm, and the radius r of the circle where the second front cutter face and the fourth rear cutter face are located meets the following requirements: r is less than 0.1 mm.

9. The ball nose tool of claim 8, wherein an inclined plane is arranged between the outer surface of the shank and the second side tool surface, and an included angle a formed by the inclined plane and the second side tool surface satisfies: a is more than or equal to 25 degrees and less than or equal to 45 degrees.

10. The ball nose tool of claim 9, wherein a second transition groove is provided between the rake face and the second flank face.

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