Sawtooth-shaped PCD cutting tool

Abstract

The utility model discloses a zigzag PCD cutting tool, which relates to the technical field of cutting tools, and comprises a tool body and a processing end arranged at the tail end of the tool body, cutting edges are axially arranged on the surface of the processing end, the cutting edges are uniformly and annularly arrayed around the processing end, and cutting tooth groups are intermittently arranged on the surfaces of the cutting edges. Every two axially adjacent cutting tooth sets are arranged in a staggered mode in the horizontal direction, in the machining process, the portions, provided with the cutting tooth sets, of the surfaces of the cutting edges cut out tooth-groove-shaped lines on the surface of a workpiece, then the tooth-groove-shaped line portions on the surface of the workpiece make contact with the complete cutting edge portions, and the line portions are cut off and flattened by the complete cutting edge portions. In the whole process, the cutting edges make contact with the workpiece in a staggered mode, the contact positions of the cutting edges and the workpiece are different and are not in complete contact, high temperature generated in the cutting work is reduced, the service life of the cutting tool is prolonged, the contact positions of the cutting edges and the workpiece are limited all the time, the passivation period of the cutting edges is prolonged, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to cutting tool technical field especially relates to a zigzag PCD cutting tool. BACKGROUND

[0002] PCD cutting tool refers to the cutting tool that adopts polycrystalline diamond as cutting edge, has high hardness, wear resistance, good thermal conductivity, low friction coefficient and low thermal expansion coefficient and other characteristics, is widely used in aerospace, automobile parts processing, wind power accessories and other fields.

[0003] Usually cutting tool is mainly used for groove milling, boring, plane milling and other processes, and the main cutting method is to cut the metal on the workpiece surface by rotating the tool or moving the tool horizontally to make the workpiece plastic, and the cutting tool needs to be polished to ensure sharpness after a certain period of use in the processing process to avoid the phenomenon of insufficient sharpness, burr on the processing surface or insufficient processing progress.

[0004] In the case of opening, reaming and slotting, the operator usually chooses to use a groove drill tool, which has fast processing speed and good chip removal effect, but in the actual use process, the contact area with the metal workpiece is large, and the cutting edge of the groove drill keeps intermittent contact with the workpiece and cutting in each rotation cycle, which causes the cutting edge to blunt too fast and needs to be polished regularly, shortening the service life. SUMMARY

[0005] In order to make up for the shortcomings of the prior art, the purpose of the utility model is to solve the problems existing in the prior art: the cutting edge of the groove drill tool always keeps intermittent contact with the processing surface of the workpiece during use, the blunting speed is too fast during cutting processing, and regular polishing is needed, so the service life is short.

[0006] In order to solve the problems of the prior art, the technical scheme of the utility model is as follows: a tool body and a processing end arranged at the end of the tool body are included, the surface of the processing end is axially provided with a cutting edge, the cutting edge is uniformly arranged in a ring array around the processing end, the cutting edge surface is intermittently provided with a cutting tooth group, and the two adjacent cutting tooth groups are staggered along the horizontal direction.

[0007] Further, the cutting tooth group is composed of a plurality of arc-shaped teeth, the arc-shaped teeth extend along the cutting edge edge to the processing end and gradually decrease, so that the metal chips can smoothly move along the arc-shaped teeth and leave to be excluded outward, guiding the movement of iron chips.

[0008] Further, the cutting tooth group is arranged on one side of the cutting edge edge.

[0009] Further, the overall length of the cutting tooth group is less than the interval between the two axially adjacent cutting tooth groups, so that the overall structure is in contact with the workpiece at the same position in the rotation process.

[0010] Further, the cutting tooth group is spaced between each arc-shaped tooth, and the cutting edge width at the interval is equal to the width of the arc-shaped tooth.

[0011] Further, the machining end and the connecting part of the cutting edge and the cutter body are provided with an inclined surface, so that the iron filings generated in the machining process can be smoothly discharged outward.

[0012] Further, the top end edge of the cutting edge is provided with a smooth chamfer, which reduces stress concentration, reduces vibration of the overall structure in work, strengthens stability, and prolongs service life.

[0013] Compared with the prior art, the advantages of the utility model are as follows:

[0014] The utility model discloses a cutting edge on the machining end surface of the cutter body is used for machining the workpiece, and the part of the cutting tooth group on the surface of the cutting edge is used for cutting the tooth groove pattern on the surface of the workpiece in the machining process, then the tooth groove pattern part on the surface of the workpiece is contacted with the complete cutting edge part, and the pattern part is cut and flattened by the complete cutting edge part, the cutting edge is staggered and contacted with the workpiece in the whole process, and the contact position with the workpiece is different each time and is not complete, the high temperature generated in the cutting work is reduced, the cutting tool life is prolonged, and the position of the contact part of the cutting edge and the workpiece is always limited, the passivation period of the cutting edge is prolonged, and the service life is increased. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is the overall structure schematic diagram of the utility model.

[0016] Fig. 2 It is the machining end structure enlarged schematic diagram of the utility model.

[0017] Reference signs: 1, cutter body, 2, machining end, 3, cutting edge, 4, cutting tooth group. DETAILED DESCRIPTION

[0018] The technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments.

[0019] As Figs. 1-2As shown, a kind of sawtooth PCD cutting tool, including cutter body 1 and the processing end 2 of the end of cutter body 1, the surface of processing end 2 is axially provided with cutting edge 3, cutting edge 3 is uniformly annular array around processing end 2, cutting edge 3 is intermittently provided with cutting tooth group 4, the part of cutting edge 3 provided with cutting tooth group 4 is sawtooth, the junction of processing end 2 and cutting edge 3 with cutter body 1 is provided with inclined surface, so that the iron filings generated in the machining process can be smoothly discharged outward, the top of cutting edge 3 one end edge is provided with smooth chamfer, reduce stress concentration, and reduce the vibration generated in the work of overall structure, strengthen stability, prolong service life;

[0020] Cutting tooth group 4 is composed of several arc teeth, the arc teeth extend along the edge of cutting edge 3 to the direction of processing end 2 and gradually reduce, so that metal chips can be smoothly moved along the arc teeth and leave outwardly excluded, guide the movement of iron filings, the two cutting tooth groups 4 adjacent in axial direction are staggered in horizontal direction, the side of cutting tooth group 4 close to the edge of cutting edge 3 penetrates cutting edge 3, the overall length of cutting tooth group 4 is less than the interval between the two adjacent cutting tooth groups 4 in axial direction, so that the workpiece is contacted with cutting tooth group 4 and cutting edge 3 in the rotating process of overall structure in interval, there is a spacing between each arc tooth of cutting tooth group 4, and the width of cutting edge 3 at the spacing is equal to the width of the arc tooth.

[0021] Working principle is explained as follows: firstly, the overall structure is rotated in the use process, and is contacted with the machining surface of workpiece in the rotating process, the part of cutting edge 3 provided with cutting tooth group 4 cuts the surface of workpiece into sawtooth tooth groove shape in the contacting process, then the part of cutting edge 3 not provided with cutting tooth group 4 cuts the sawtooth tooth groove shape part of workpiece surface, so that the workpiece surface is cut flat, the workpiece machining surface contacted by cutting edge 3 is limited each time, so as to avoid rapid passivation of cutting edge 3, and prolong service life.

[0022] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A serrated PCD cutting tool, comprising a tool body (1) and a machining end (2) disposed at the end of the tool body (1), characterized in that: The surface of the processing end (2) is provided with a cutting edge (3) axially. The cutting edge (3) is arranged in a uniform ring array around the processing end (2). The surface of the cutting edge (3) is provided with cutting tooth groups (4) intermittently. Two axially adjacent cutting tooth groups (4) are staggered in the horizontal direction.

2. The serrated PCD cutting tool according to claim 1, characterized in that: The cutting gear assembly (4) consists of several arc-shaped teeth, which extend along the cutting edge (3) toward the machining end (2) and gradually shrink.

3. A serrated PCD cutting tool according to claim 1, characterized in that: The cutting tooth assembly (4) penetrates the cutting edge (3) on the side near the edge of the cutting edge (3).

4. A serrated PCD cutting tool according to claim 1, characterized in that: The overall length of the cutting tooth group (4) is less than the distance between two adjacent cutting tooth groups (4) in the axial direction.

5. A serrated PCD cutting tool according to claim 2, characterized in that: The cutting tooth group (4) has a gap between each arc tooth, and the width of the cutting edge (3) at the gap is equal to the width of the arc tooth.

6. A serrated PCD cutting tool according to claim 1, characterized in that: An inclined surface is provided at the connection between the machining end (2) and the cutting edge (3) and the tool body (1).

7. A serrated PCD cutting tool according to claim 1, characterized in that: The cutting edge (3) has a smooth chamfer at one end.

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