CN109365891B

CN109365891B - Grooving cutter

Info

Publication number: CN109365891B
Application number: CN201811478051.XA
Authority: CN
Inventors: 宋吉; 刘威; 李明; 陈指福
Original assignee: Taizhou Ruian Cemented Carbide Tools Co ltd
Current assignee: Taizhou Ruian Cemented Carbide Tools Co ltd
Priority date: 2018-12-05
Filing date: 2018-12-05
Publication date: 2020-08-28
Anticipated expiration: 2038-12-05
Also published as: CN109365891A

Abstract

The invention provides a grooving cutter, and belongs to the technical field of cutting tools. The grooving tool solves the problems that the existing grooving tool is easy to shake after being used for a long time and the machining is not stable enough. This grooving cutter, including being the body of three horn shapes, the middle part of body is equipped with the mounting hole that supplies the screw to pass, and the three extreme angle department of body all is equipped with the cutting edge, and the cutting edge all is located the side of body, is equipped with the chip breaker groove on the rake face of cutting edge, is equipped with the chip breaker platform in the chip breaker groove, is close to the inner of chip breaker groove on the body and is equipped with spacing recess, and the side of spacing recess sets up with the upper and lower terminal surface of body is perpendicular. This grooving cutter has the better and higher advantage of machining precision of locate effect.

Description

Grooving cutter

Technical Field

The invention belongs to the technical field of cutting tools, and relates to a grooving tool.

Background

At present, cutting machining is the main basic process of manufacturing technology worldwide, and is in the period of rapid development of manufacturing technology, and with the development of manufacturing technology, the development of new cutting technology and new machining method by high-speed cutting development has been advanced. The metal cutting tool is used as essential matched process equipment of a numerical control machine tool, enters the development stage of the numerical control tool under the drive of a numerical control machining technology, and has the characteristics of high efficiency, high precision and high reliability. Meanwhile, with the high rigidity, high speed and high precision of the machine tool, the high-performance cutter becomes an essential tool for high-speed, high-performance and high-precision machining. Most of the grooving cutters sold in the market at present are hard alloy cutters and high-speed steel coated cutters, and due to the fact that the cutting blades are low in cutting speed, the requirement for high-speed cutting cannot be met. The grooving cutter used at present is generally single-ended or double-ended, and the service life of a blade is short.

For example, an indexable triangular grooving cutter (application number: 201420790115.0) disclosed in the chinese patent document comprises a blade body, the blade body is a single-sided composite PCBN blade, the cross-sectional shape of the blade body is triangular, bosses extend from three corners of the blade body, and cutting edges are formed on the PCBN layer side of the three bosses. However, the side surfaces of the indexable triangular grooving tool are flat, so that the grooving tool is easy to shake after being mounted on the tool holder and used for a long time, and the machining is not stable enough.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a grooving cutter with good positioning effect and high machining precision.

The purpose of the invention can be realized by the following technical scheme: the utility model provides a grooving cutter, is including being the body of three horn shapes, the middle part of body be equipped with the mounting hole that supplies the screw to pass, the three extreme angle department of body all be equipped with the cutting edge, the cutting edge all be located the side of body, its characterized in that, the rake face of cutting edge on be equipped with the chip breaker, the chip breaker in be equipped with the chip breaker platform, the body on be close to the inner of chip breaker be equipped with spacing recess, spacing recess the side with the upper and lower terminal surface of body set up perpendicularly.

During the installation, inlay the body in the mounting groove of cutter handle, be equipped with on the inside wall of cutter handle's mounting groove with spacing protruding body of spacing recess assorted, consequently when this grooving to installing the mounting groove at cutter handle, have the better advantage of location effect to this grooving sword, make difficult production of this grooving sword rock, make this grooving sword more stable at the course of working, guaranteed the machining precision. Through the chip breaking table in the chip breaking groove, cutting chips generated by cutting can be cut off, the cutting chips can be smoothly discharged, impact damage of the winding of the cutting chips on a cutting edge is reduced, the service life of a cutter is prolonged, scraping damage of the winding of the cutting chips on a machined workpiece is reduced, the surface smoothness of the machined workpiece is improved, the chip removing strength of an operator is effectively reduced, and the production efficiency is improved.

In the grooving cutter, the limiting groove is hook-shaped and penetrates through the side surface of the body. The limiting groove is hook-shaped and is attached to the limiting convex body in the corresponding shape on the mounting groove, the rotation of the grooving tool caused by the cutting edge in the machining process is effectively inhibited, the grooving tool is more stable in the machining process, and the cutting precision is improved.

In an above-mentioned grooving tool, the chip-breaking platform including set up the chip-breaking groove in and convex preceding chip-breaking platform and back chip-breaking platform, preceding chip-breaking platform be located the cutting edge with back chip-breaking platform between, preceding chip-breaking platform with the cross-section of back chip-breaking platform be the arc just the curvature radius of preceding chip-breaking platform be greater than the curvature radius of back chip-breaking platform, back chip-breaking platform bulge out preceding chip-breaking platform. The front chip breaking table is in gentle transition with the front cutter face, cutting chips generated by guide machining bend upwards to form a C-shaped bend, and the rear chip breaking table protrudes out of the front chip breaking table, the curvature radius of the rear chip breaking table is larger than that of the front chip breaking table, so that the cutting chips bent by the front chip breaking table are broken through the rear chip breaking table, and the cutting chips can be smoothly discharged.

In the above grooving tool, the chip breaker includes a first-stage chip breaker and a second-stage chip breaker, the first-stage chip breaker, the second-stage chip breaker, a front chip breaker and a rear chip breaker are smoothly tangent to each other, the front chip breaker is located in the first-stage chip breaker, and the rear chip breaker is located in the second-stage chip breaker. By adopting the arrangement, the first-stage chip breaker, the second-stage chip breaker, the front chip breaker and the rear chip breaker are in smooth tangency and form curves with different bending curvature structures, so that the chip breaker has the advantages of better chip breaking effect, difficulty in stress concentration generation and longer service life.

In the grooving cutter, the front chip breaking table is arc-shaped and is in gentle transition with the front cutter face. By adopting the arrangement, the front chip breaking table can better guide the scrap iron generated by processing to bend upwards to form a C-shaped bend.

In the grooving cutter, the curvature radius r1 of the front chip breaking table is 0.8mm-1.5 mm. The radius of curvature r1 of the chip breaker as preferred is 1.2 mm.

In the grooving cutter, the curvature radius r2 of the rear chip breaking table is 0.3mm-0.8 mm. Preferably, the curvature radius r2 of the rear chip-breaker is 0.6mm

In one of the above described slot-cutting knifes, the rake surface forms an included angle θ 1 with the corresponding insert side surface of between 14 ° and 18 °. Preferably, the included angle θ 1 formed between the rake surface and the corresponding insert side surface is 16 °

In one of the above groove cutters, the rake surface forms an angle θ 2 with a tangent line of the rear chip breaking platform near the front chip breaking platform, which is 80-100 °. Preferably, the rake face forms an angle θ 2 of 86 ° with a tangent line of the rear chip-breaking land near the front chip-breaking land.

In the grooving cutter, the width L1 between the cutting edge of the cutting edge and the inner end edge of the chip breaker groove is 4.0-6.5 mm. Preferably, the width L1 between the tip of the cutting edge and the inner end edge of the chip breaker is 5.5 mm.

In the grooving cutter, the length L2 between the cutting edge of the cutting edge and the center of the rear chip breaking table is 3.0mm-6.0 mm. Preferably, the width L2 between the cutting edge tip and the center of the rear chip breaker is 4.76 mm.

In a foretell grooving cutter, spacing recess include two plane portion one and the plane portion two that form the contained angle with the side that the body corresponds, through an arc face transitional coupling between plane portion one and the plane portion two.

In the grooving cutter, the width L3 of the limiting groove is 3.0mm-6.0 mm. Preferably, the width L3 of the spacing groove is 4.10 mm.

In the groove-cutting blade, the included angle θ 3 formed by the first planar portion and the corresponding side surface of the body is 15-20 °. Preferably, the first planar portion forms an angle θ 3 of 17 ° with the side surface of the main body.

In the groove-cutting blade, the included angle θ 4 formed by the second planar portion and the corresponding side surface of the main body is 50-80 °. Preferably, the second planar portion forms an angle of 65 ° with the body side surface.

Compared with the prior art, this grooving cutter has following advantage:

1. the inner side wall of the mounting groove of the cutter handle is provided with the limiting convex body matched with the limiting groove, so that when the groove is cut in the mounting groove of the cutter handle, the groove cutter has the advantage of better positioning effect, the groove cutter is not easy to shake, the groove cutter is more stable in the processing process, and the processing precision is ensured;

2. the limiting groove is in a hook shape and is attached to the limiting convex body in the corresponding shape on the mounting groove, so that the rotation of the grooving cutter caused by the cutting edge in the machining process is effectively inhibited, the grooving cutter is more stable in the machining process, and the cutting precision is improved;

3. the first-stage chip breaker, the second-stage chip breaker, the front chip breaker and the rear chip breaker are in smooth tangency and form curves with different bending curvature structures, so that the chip breaker has a good chip breaking effect, is not easy to generate stress concentration, and has a long service life;

drawings

Fig. 1 is a perspective view of a grooving cutter according to the present invention.

Fig. 2 is a front view of a grooving tool according to the present invention.

Fig. 3 is a schematic enlarged view of a part a of fig. 2.

Fig. 4 is a schematic enlarged view of part B of fig. 2.

Fig. 5 is a schematic view of a grooving cutter of the present invention mounted on a tool handle.

In the figure, 1, a body; 2. mounting holes; 3. a cutting edge; 4. a rake face; 5. a front chip breaking table; 6. a rear chip breaking table; 7. a first-level chip breaker groove; 8. a secondary chip breaker groove; 9. a limiting groove; 9a, a first plane part; 9b, a second plane part; 9c, an arc surface part; 10. a tool handle; 11. and a limiting convex body.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 5, a grooving tool comprises a triangular body 1, wherein a mounting hole 2 for a screw to pass through is formed in the middle of the body 1, cutting edges 3 are arranged at three corners of the body 1, the cutting edges 3 are located on the side faces of the body 1, chip breakers are arranged on rake faces 4 of the cutting edges 3, and chip breakers are arranged in the chip breakers. The chip-breaking platform is including setting up in the chip-breaking groove and convex preceding chip-breaking platform 5 and back chip-breaking platform 6, and preceding chip-breaking platform 5 is the arc and gently passes through with rake face 4, and preceding chip-breaking platform 5 is located between cutting edge 3 and back chip-breaking platform 6, and preceding chip-breaking platform 5 is the arc and the curvature radius of preceding chip-breaking platform 5 is greater than the curvature radius of back chip-breaking platform 6 with the cross-section of back chip-breaking platform 6, and back chip-breaking platform 6 protrusion is in preceding chip-breaking platform 5. The chip breaker comprises a first-stage chip breaker 7 and a second-stage chip breaker 8, wherein the first-stage chip breaker 7, the second-stage chip breaker 8, a front chip breaker 5 and a rear chip breaker 6 are in smooth tangency, the front chip breaker 5 is located in the first-stage chip breaker 7, and the rear chip breaker 6 is located in the second-stage chip breaker 8. By adopting the arrangement, the primary chip breaker 7, the secondary chip breaker 8, the front chip breaker 5 and the rear chip breaker 6 are in smooth tangency and form curves with different bending curvature structures, so that the chip breaker has the advantages of better chip breaking effect, difficulty in stress concentration generation and longer service life.

The radius of curvature r1 of the front chip-breaker 5 is 0.8mm-1.5 mm. The radius of curvature r1 of the chip breaker as preferred is 1.2 mm. The curvature radius r2 of the rear chip-breaking platform 6 is 0.3mm-0.8 mm. Preferably, the radius of curvature r2 of the rear chip-breaker table 6 is 0.6 mm.

The rake surface 4 forms an included angle θ 1 with the corresponding insert side surface of 14-18 °. Preferably, the included angle θ 1 formed between the rake face 4 and the corresponding insert side face is 16 ° and the included angle θ 2 formed between the rake face 4 and a tangent line of the rear chip-breaking land 6 near the front chip-breaking land 5 is 80-100 °. Preferably, the rake surface 4 forms an angle θ 2 with a tangent line of the rear chip-breaking land 6 near the front chip-breaking land 5 of 86 °.

The width L1 between the tip of the cutting edge 3 and the inner end edge of the chip breaker groove is 4.0mm-6.5 mm. Preferably, the width L1 between the tip of the cutting edge 3 and the inner end edge of the chip breaker is 5.5 mm. The width L2 between the tip of the cutting edge 3 and the center of the rear chip breaker 6 is 3.0mm-6.0 mm. Preferably, the length L2 between the tip of the cutting edge 3 and the center of the rear chip breaker 6 is 4.76 mm.

The inner end of the body 1 close to the chip breaker groove is provided with a limiting groove 9, the side surface of the limiting groove 9 is perpendicular to the upper end surface and the lower end surface of the body 1, and the limiting groove 9 is in a hook shape and penetrates through the side surface of the body 1. The limiting groove 9 comprises a first plane part 9a and a second plane part 9b, included angles are formed between the two side faces corresponding to the body 1, and the first plane part 9a and the second plane part 9b are in transition connection through an arc surface part 9 c.

The width L3 of the limiting groove 9 is 3.0mm-6.0 mm. Preferably, the width L3 of the stopper groove 9 is 4.10 mm. The angle θ 3 formed by the first planar portion 9a and the corresponding side surface of the main body 1 is 15-20 °. Preferably, the angle θ 3 formed by the first plane portion 9a and the side surface of the main body 1 is 17 °. The side surfaces of the second planar portion 9b corresponding to the main body 1 form an included angle θ 4 of 50-80 °. Preferably, the second planar portion 9b forms an angle 65 ° with the side surface of the main body 1.

During the installation, inlay body 1 in the mounting groove of cutter handle 10, be equipped with on the inside wall of the mounting groove of cutter handle 10 with spacing protruding body 11 of spacing recess 9 assorted, consequently when this grooving to installing at the mounting groove of cutter handle 10, have the better advantage of location effect to this grooving cutter, make this grooving cutter difficult production rock, make this grooving cutter more stable at the course of working, guaranteed the machining precision. The limiting groove 9 is hook-shaped and is attached to the limiting convex body 11 of the corresponding shape on the mounting groove, so that the rotation of the grooving tool caused by the cutting edge 3 in the machining process is effectively inhibited, the grooving tool is more stable in the machining process, and the cutting precision is improved.

The front chip breaking table 5 is arc-shaped and is in smooth transition with the front tool face 4, so that the front chip breaking table 5 can better guide the bending of scrap iron generated by processing to upwards form a C-shaped bend, the rear chip breaking table 6 protrudes out of the front chip breaking table 5, the curvature radius of the rear chip breaking table 6 is larger than that of the front chip breaking table 5, cutting chips passing through the bend of the front chip breaking table 5 are broken through the rear chip breaking table 6, the cutting chips can be smoothly discharged, the impact damage of the winding of the cutting chips on the cutting edge 3 is reduced, the service life of a cutter is prolonged, the scraping damage of the winding of the cutting chips on a processed workpiece is reduced, the surface smoothness of the processed workpiece is improved, the chip removing strength of an operator is effectively reduced, and the production efficiency is improved.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Although the terms of the body 1, the mounting hole 2, the cutting edge 3, the rake face 4, the front chip breaker 5, the rear chip breaker 6, the primary chip breaker 7, the secondary chip breaker 8, the limit recess 9, the first flat portion 9a, the second flat portion 9b, the arc portion 9c, the tool handle 10, the limit projection 11, etc., are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims

1. The utility model provides a grooving cutter, includes body (1) that is three horn shapes, the middle part of body (1) be equipped with mounting hole (2) that supply the screw to pass, three extreme angle department of body (1) all be equipped with cutting edge (3), cutting edge (3) all be located the side of body (1), its characterized in that, the rake face (4) of cutting edge (3) on be equipped with the chip breaker, the chip breaker in be equipped with chip breaking platform, body (1) on be close to the inner of chip breaker be equipped with spacing recess (9), the side of spacing recess (9) with the upper and lower terminal surface of body (1) set up perpendicularly, spacing recess (9) be colluded just spacing recess (9) run through in the side of body (1), chip breaker including setting up in the chip breaker and convex preceding chip breaker (5) and back chip breaker (6), preceding chip-breaking platform (5) be located cutting edge (3) with back chip-breaking platform (6) between, preceding chip-breaking platform (5) with the cross-section of back chip-breaking platform (6) be the arc just preceding chip-breaking platform (5) the radius of curvature be greater than back chip-breaking platform (6) the radius of curvature, back chip-breaking platform (6) protrusion in preceding chip-breaking platform (5), the chip-breaking groove include one-level chip-breaking groove (7) and second grade chip-breaking groove (8), preceding chip-breaking platform (5) be located one-level chip-breaking groove (7) in, back chip-breaking platform (6) be located second grade chip-breaking groove (8) in, one-level chip-breaking groove (7), second grade chip-breaking groove (8), preceding chip-breaking platform (5) and back chip-breaking platform (6) be slick and sly tangent.

2. A slot-cutting knife according to claim 1, characterized in that the radius of curvature r1 of the front chip-breaker table (5) is 1.2-1.5 mm and the radius of curvature r2 of the rear chip-breaker table (6) is 0.3-0.8 mm.

3. A slot-cutting knife according to claim 1 or 2, characterized in that the rake surface (4) forms an angle θ 1 with the corresponding blade side surface of 14-18 °, and the rake surface (4) forms an angle θ 2 with a tangent line of the rear chip-breaker (6) near the front chip-breaker (5) of 80-100 °.

4. A slot-cutting knife according to claim 1 or 2, characterized in that the width L1 between the tip of the cutting edge (3) and the inner end edge of the chip breaker is 4.0-6.5 mm, and the width L2 between the tip of the cutting edge (3) and the center of the rear chip breaker (6) is 3.0-6.0 mm.

5. A grooving cutter as claimed in claim 1 or 2, wherein the limiting groove (9) comprises two first planar portions (9a) and two second planar portions (9b) forming an included angle with the corresponding side of the body (1), and the first planar portions (9a) and the second planar portions (9b) are transitionally connected through an arc portion (9 c).

6. A grooving cutter as claimed in claim 5, wherein the width L3 of the limiting groove (9) is 3.0mm-6.0 mm.

7. A slot-cutting knife according to claim 6, wherein the side face formation angle θ 3 of the first planar portion (9a) with respect to the body (1) is 15-20 °, and the side face formation angle θ 4 of the second planar portion (9b) with respect to the body (1) is 50-80 °.