CN222002110U - Thread milling cutter - Google Patents

Abstract

The utility model belongs to the technical field of precision machining tools, and particularly discloses a thread milling cutter, which comprises: a cutterhead; the periphery of the cutter disc is provided with a plurality of cutter teeth at intervals, and the cutter teeth are provided with a cutting side face and two end faces; the cutting side surface is positioned at the front side of the rotation direction of the cutter tooth, and the edge of the cutting side surface of the cutter tooth and the edge of the end surface of the cutter tooth form a first cutting edge; the end face of the cutter tooth is provided with a plurality of first chip removal grooves; the edge of the first chip groove facing the first cutting edge and the edge of the end face of the cutter tooth form a second cutting edge, and the angles of the first cutting edge and the second cutting edge are different. Because the cutting angle of the second cutting edge is different from that of the first cutting edge, the cut part can be ground more effectively, the grinding effect on the threads is enhanced, the thread surface is smoother, the smoothness is high, the thread maintainability is good, and the workload of the subsequent polishing process is reduced.

Description

Thread milling cutter

Technical Field

The utility model relates to the technical field of precision machining tools, in particular to a thread milling cutter.

Background

The thread milling cutter can be used for machining threads of a workpiece, and the thread milling cutter is provided with a plurality of cutting cutter teeth, and can cut through holes of the workpiece when rotating so as to machine the threads. Cutting edges of cutter teeth of thread milling cutters on the market are all located on the side faces of the cutter teeth, each cutter tooth only cuts a workpiece once when rotating for one circle, and if the cutting edges are damaged or passivated, the situation that the sizes of the cut parts are different from the designed sizes is easy to occur, so that the machining precision of the workpiece is affected.

Disclosure of utility model

The purpose of the utility model is that: the thread milling cutter is provided to solve the technical problems that the size of a cutting part and the design size are more different when a cutting edge is machined in the prior art, and the machining precision is affected.

In order to achieve the above object, the present utility model provides a thread milling cutter comprising:

The cutter head is provided with a plurality of cutter teeth at intervals on the periphery, and each cutter tooth is provided with a cutting side face, a front end face and a rear end face; the cutting side surface is positioned at the front side of the cutter tooth in the rotating direction; the front end face and the rear end face of the cutter tooth are respectively positioned at two sides of the cutting side face of the cutter tooth, and the edge of the cutting side face of the cutter tooth and the edge of the front end face and/or the rear end face close to the cutting side face form a first cutting edge; a plurality of first chip grooves are formed in the front and/or rear end surfaces of the cutter teeth; the edge of the first chip groove facing the first cutting edge and the adjacent edge of the end face of the cutter tooth form a second cutting edge, and the angles of the first cutting edge and the second cutting edge are different.

Preferably, the end face provided with the first chip groove is further provided with a second chip groove, and the second chip groove is intersected with and communicated with the first chip groove.

Preferably, the edge of the second chip groove facing the first cutting edge and the edge of the end surface of the cutter tooth form a third cutting edge, and the angle of the first cutting edge and the third cutting edge are the same.

Preferably, the first junk slot is an arc slot.

Preferably, the first junk slot is an S-shaped slot.

Preferably, the first junk slot is a straight line slot.

Preferably, the first chip grooves extend from the intersection of the end surface of the cutter tooth and the cutter head to the outer peripheral surface, the rear corner surface, or the side surface of the rear side in the rotation direction of the cutter tooth, respectively.

Preferably, the width of the end, close to the cutterhead, of the first chip groove is smaller than the width of the end, away from the cutterhead, of the first chip groove.

Preferably, the cutting side surface is helical.

Preferably, the cutterhead is further provided with a spindle connection.

The thread milling cutter provided by the utility model has the beneficial effects that: the thread milling cutter is provided with the first chip removal groove, so that the second cutting edge is formed on the end face of the cutter tooth, the second cutting edge can cut the cut position of the first cutting edge for the second time, and the cut part can be ground due to the fact that the cutting angles of the second cutting edge and the first cutting edge are different, the grinding effect on threads is improved, the thread surface is smoother, the thread smoothness is high, and the workload of a subsequent polishing procedure is reduced.

Additional aspects and advantages of the utility model 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 utility model.

Drawings

FIG. 1 is a schematic view of a thread milling cutter according to an embodiment of the present utility model having a first flute and a second flute;

FIG. 2 is a schematic view of the thread milling cutter of FIG. 1 from another perspective;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 1;

FIG. 4 is a schematic view of a thread milling cutter with S-shaped grooves as the first chip grooves according to an embodiment of the present utility model;

FIG. 5 is an enlarged schematic view of the structure at C in FIG. 4;

FIG. 6 is a schematic view of a thread milling cutter with a first flute as a linear flute according to an embodiment of the present utility model;

Fig. 7 is an enlarged schematic view of the structure at B in fig. 6.

In the figure, 100, a cutter head; 110. a main shaft connecting part; 200. cutter teeth; 201. cutting the side surface; 202. an end face; 203. an outer peripheral surface; 204. a rear corner surface; 205. a back side; 210. a first cutting edge; 220. a first junk slot; 230. a second cutting edge; 240. a second junk slot; 250. and a third cutting edge.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 1 to 7, a thread milling cutter according to an embodiment of the present utility model will be described.

As shown in fig. 1 to 2, the thread milling cutter according to the embodiment of the present utility model is mainly used for machining threads, and includes a cutter head 100; a plurality of cutter teeth 200 are arranged at intervals on the periphery of the cutter head 100, the cutter teeth 200 form two end faces 202 in the axial direction of the cutter head 100, the front side of the cutter teeth 200 in the rotation direction is a cutting side face 201, namely, the cutter teeth 200 are provided with the cutting side face 201, a front end face 202 and a rear end face 202; the two end surfaces 202 of the cutter tooth 200 are respectively located at two sides of the cutting side surface 201 of the cutter tooth 200, and the edge of the cutting side surface 201 of the cutter tooth 200 and the edge of the front and/or rear end surfaces 202 of the cutter tooth 200 form a first cutting edge 210; the edges of the cutting side surfaces 201 intersecting the front and/or rear end surfaces 202 of the cutter teeth 200 form the edges of the first cutting edge 210, the edges forming the first cutting edge 210 with the solid edges adjacent to the edges, the first cutting edge 210 utilizing the edges to cut a workpiece.

Referring to fig. 2 and 3, in this embodiment, the front and rear end surfaces 202 of the cutter tooth 200 are provided with a plurality of first junk slots 220, and of course, may alternatively be provided on only one of the end surfaces; the edge of the first flute 220 facing the first cutting edge 210 and the edge of the end face 202 of the cutter tooth 200 adjacent the first flute 220 form a second cutting edge 230; i.e., second cutting edges 230 are formed on both end surfaces 202 of the cutter tooth 200. The edge of the first chip groove 220 where the groove surface intersects the end surface 202 of the cutter tooth 200 is a knife edge, the knife edge faces the first cutting edge 210, and the knife edge and the solid edge close to the knife edge form a second cutting edge 230, i.e. the second cutting edge 230 can cut the workpiece attached to the end surface 202. The angle of the first cutting edge 210 is different from the angle of the second cutting edge 230, i.e., the cutting angle of the first cutting edge 210 is different from the cutting angle of the second cutting edge 230 during cutting.

In the primary rotation cutting process of the thread milling cutter, the second cutting edge 230 can perform secondary cutting, namely grinding, on the position where the first cutting edge 210 is cut, and due to the fact that the cutting angles of the second cutting edge 230 and the first cutting edge 210 are different, the cut part can be ground more effectively, the grinding effect on threads is enhanced, the thread surface is smoother, the smoothness is high, the thread maintainability is good, and the workload of the subsequent polishing process is reduced.

And the second cutting edge 230 can be considered as a supplementary edge of the first cutting edge 210, so that the cut part is subjected to one supplementary cutting, the cutting times of the first cutting edge 210 on the same cutting part can be reduced, and the abrasion degree of the first cutting edge 210 can be reduced.

It should be noted that, the second cutting edge 230 may generate chip powder during the cutting process, and the chip powder may fall into the first chip groove 220 and then be discharged through the first chip groove 220, so as to avoid the chip powder from being clamped between the cutter tooth 200 and the workpiece, and affecting the machining precision of the workpiece.

In the present embodiment, the cutter head 100 has four cutter teeth 200, and is disposed in sequence around the rotation axis of the cutter head 100 at the outer periphery of the cutter head 100. In addition, the number of the cutter teeth 200 on the cutter head 100 may be set according to practical situations, and may be set to two, three, five or the like cutter teeth 200.

Referring to fig. 1 and 2, the cutting side surface 201 is spiral, and the edge of the first cutting edge 210 formed by the intersection of the cutting side surface 201 and the front and rear end surfaces 202 is also spiral to machine the thread. In addition, in order to facilitate the connection of the machine tool spindle, the cutterhead 100 also has a spindle connection 110 for facilitating the assembly with the machine tool spindle.

In a preferred embodiment of the present utility model, referring to fig. 1 to 3, in order to better discharge the chip powder, the end surface 202 of the cutter tooth 200 is provided with a second chip groove 240, and the second chip groove 240 intersects with and communicates with the first chip groove 220, i.e., a plurality of second chip grooves 240 communicate with the first chip groove 220, so that the chip powder generated by the processing of the second cutting edge 230 can be discharged through the second chip groove 240 and the first chip groove 220, i.e., can be discharged through more chip grooves, to better discharge the chip powder. On the basis of the above, the edge of the second chip groove 240 facing the first cutting edge 210 and the edge of the end surface 202 of the cutter tooth 200 form a third cutting edge 250, and the angle between the first cutting edge 210 and the third cutting edge 250 is the same. The edge where the groove surface of the second junk slot 240 intersects the end surface 202 of the cutter tooth 200 is a cutter edge, the cutter edge faces the first cutting edge 210, and a third cutting edge 250 is formed by the cutter edge and the solid edge close to the cutter edge, that is, the third cutting edge 250 can cut a workpiece attached to the end surface 202. The angle of the first cutting edge 210 is the same as the angle of the third cutting edge 250, i.e., the cutting angle of the first cutting edge 210 is the same as the cutting angle of the third cutting edge 250 during cutting.

Similarly, the third cutting edge 250 can cut the cut position of the first cutting edge 210 twice, so that the number of times of cutting the same cutting position by the first cutting edge 210 can be reduced, and the wear degree of the first cutting edge 210 can be reduced.

It should be noted that, the third cutting edge 250 may generate chip powder during the cutting process, and the chip powder may fall into the second chip groove 240 and then be discharged through the second chip groove 240, so as to avoid the chip powder from being blocked between the cutter tooth 200 and the workpiece, and affecting the machining precision of the workpiece. On the basis of the above, the first junk slots 220 are arc-shaped slots, that is, the first junk slots 220 are arc-shaped, so that the first junk slots can better intersect with the second junk slots 240, and the chip powder can be conveniently discharged from a plurality of positions.

In some embodiments of the utility model, the first junk slots 220 may also be configured as S-shaped slots, as shown in fig. 4 and 5. That is, the first chip groove 220 has an S-shaped trend, and the second cutting edge 230 formed by the groove surface of the first chip groove 220 and the end surface 202 of the cutter tooth 200 is also an S-shaped trend, so that a plurality of cutting angles are formed between the second cutting edge 230 and the first cutting edge 210, thereby increasing the grinding angle and enhancing the grinding effect.

In some embodiments of the utility model, the first junk slots 220 may also be provided as linear slots, as shown in fig. 6 and 7. That is, the first chip groove 220 has a straight line, and the second cutting edge 230 formed by the groove surface of the first chip groove 220 and the end surface 202 of the cutter tooth 200 is also a straight line, so that the chip groove with the straight line is more convenient for discharging the chip powder, and the influence of the chip powder on cutting is avoided.

In the S-shaped chip grooves and the linear chip grooves described above, referring to fig. 5 and 7, the first chip groove 220 extends from the intersection of the end surface 202 of the cutter tooth 200 and the cutterhead 100 to the outer peripheral surface 203, the relief surface 204, or the side surface of the rear side of the cutter tooth 200 in the rotation direction, respectively. The outer circumferential surface 203 of the cutter tooth 200 is a circumferential surface of the cutter tooth 200 deviating from the cutter head 100 and is a cylindrical surface; the rear corner surface 204 connects the outer peripheral surface 203 and the side surface of the rear side of the cutter tooth 200 in the rotation direction, the rear corner surface 204 is a plane, and a gap is formed between the rear corner surface 204 and the machined surface of the workpiece, so that friction is reduced, and heat generated in the machining process of the cutter tooth 200 is reduced. The back surface 205 of the surface of the rear side in the rotation direction of the cutter tooth 200 is a surface which does not participate in the cutting process. The ports at both ends of the first chip groove 220 are not communicated with the first cutting edge 210, so that the chip powder is discharged from the first chip groove 220, and the cutting of the thread milling cutter is not hindered, and the cutting is performed normally.

Furthermore, on the basis of the above, the width of the end of the first flutes 220 adjacent to the cutterhead 100 is smaller than the width of the end of the first flutes 220 facing away from the cutterhead 100. Due to the centrifugal force, the chip powder is concentrated at the outer end part of the chip groove, so that the volume of the outer end part of the chip groove is increased, the chip powder is prevented from being clamped between a workpiece and a milling cutter, and chip removal is better.

In summary, the thread milling cutter of the present embodiment, by providing the first chip groove 220, the second cutting edge 230 is formed on the end face 202 of the cutter tooth 200, so that the second cutting edge 230 can cut the cut position of the first cutting edge 210 for the second time, and since the cutting angles of the second cutting edge 230 and the first cutting edge 210 are different, the cut portion can be ground, the grinding effect on the thread is increased, the thread surface is smoother, the thread smoothness is high, and the workload of the subsequent polishing process is reduced.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.

Claims (10)

1. A thread milling cutter, comprising: A cutter disc, wherein a plurality of teeth are arranged at intervals on the outer periphery of the cutter disc, and the teeth have a cutting side surface and front and rear end surfaces; the cutting side surface is located at the front side of the rotation direction of the tooth; the front and rear end surfaces of the tooth are respectively located on both sides of the cutting side surface of the tooth, and the edge of the cutting side surface of the tooth and the edge of the front and/or rear end surface close to the cutting side surface constitute a first cutting edge; a plurality of first chip grooves are arranged on the front and/or rear end surface of the tooth; the edge of the first chip groove facing the first cutting edge and the adjacent edge of the end surface of the tooth constitute a second cutting edge, and the angles of the first cutting edge and the second cutting edge are different. 2 . The thread milling cutter according to claim 1 , wherein the end surface provided with the first chip removal groove is also provided with a second chip removal groove, and the second chip removal groove intersects and communicates with the first chip removal groove. 3. The thread milling cutter according to claim 2, characterized in that the edge of the second chip groove facing the first cutting edge and the edge of the end face of the tooth form a third cutting edge, and the first cutting edge and the third cutting edge have the same angle. 4 . The thread milling cutter according to claim 3 , wherein the first chip removal groove is an arc-shaped groove. 5 . The thread milling cutter according to claim 1 , wherein the first chip removal groove is an S-shaped groove. 6 . The thread milling cutter according to claim 1 , wherein the first chip removal groove is a straight groove. 7. The thread milling cutter according to claim 1, 5 or 6, characterized in that the first chip groove extends from the intersection of the end face of the tooth and the cutter disc to the outer peripheral surface of the tooth, the back angle surface or the side surface of the tooth on the rear side in the rotation direction. 8 . The thread milling cutter according to claim 7 , wherein a width of an end of the first chip removal groove close to the cutter disc is smaller than a width of an end of the first chip removal groove away from the cutter disc. 9. The thread milling cutter according to claim 1, wherein the cutting side surface is spiral. 10. The thread milling cutter according to claim 1, characterized in that the cutter disc is further provided with a spindle connecting portion.