CN212469902U

CN212469902U - Indexable drilling blade

Info

Publication number: CN212469902U
Application number: CN202021068205.0U
Authority: CN
Inventors: 张长军; 张娇
Original assignee: Luoyang Zhongshun Precision Machinery Co ltd
Current assignee: Luoyang Zhongshun Precision Machinery Co ltd
Priority date: 2020-06-11
Filing date: 2020-06-11
Publication date: 2021-02-05
Anticipated expiration: 2030-06-11

Abstract

An indexable drilling blade relates to an indexable blade, wherein a convex boss plane which protrudes outwards and has a tooth-shaped edge is arranged on the surface of the indexable blade, the tooth shape is formed by connecting a plurality of arc sections end to end, and a chip breaker groove is formed between each arc section and a cutting edge of the indexable blade; the center hole of the indexable insert is taken as the center, the axis B, the axis A and the axis C divide the indexable insert into A, B, C equally-divided regions, the vertical line from the center of the center hole to the lower edge of the indexable insert is taken as the axis A, the axis B and the axis C are symmetrically arranged along the upward extension line of the axis A, the three regions have the same structure, each region is internally provided with two cutting edges and a smoothing edge in transitional connection between the two cutting edges, the upward extension line of the axis A divides the region A into a symmetrical left side surface and a right side surface, and arcs at the edges of the left side surface and the right side surface are provided with four sections and are symmetrically arranged; the utility model discloses cutting resistance is little, the chip removal chip breaking is good, the pore wall roughness is good.

Description

Indexable drilling blade

Technical Field

The utility model belongs to the technical field of machining and specifically relates to a but transposition drilling blade is related to.

Background

As is known, drilling is always an indispensable procedure in the field of machining and is also a difficult-to-machine procedure, and high-speed steel and hard alloy twist drills are generally used as main drilling means in the industry; with the advancement of technology and the innovation of materials, in recent years, drilling tools in a modular combination mode which is high in efficiency and environment-friendly are in endlessly. According to the depth of drilling, the diameter demand of drilling, drilling tool commonly used is as shown in figure 1, and it includes outside blade and center drill point, and this kind of drilling tool drilling is efficient, convenient and fast, only need when the cutter became invalid change center drill point or outside blade can, and to drilling processing, the chip removal is good is first requirement, secondly is blade life-span, because poor chip removal can lead to iron fillings to build up in the hole usually, unable normal discharge, and then leads to cutter to become invalid and the work piece is scrapped. Therefore, when designing the chip breaker groove of the outer blade, all the brand cutter manufacturers are designed with pertinence; however, in the use of various drilling products, we have found that these blades tend to suffer from the following problems: 1. the chip removal and breaking are good, but the machine tool is loaded, the cutting resistance is large, and the roughness of the hole wall is high; 2. the machine tool has light load and light and quick cutting, but has poor chip removal and chip breaking, even iron chips are wound to damage a drilling tool, and the smoothness of the hole wall is poor; therefore, the chip groove structure of the drilling cutter segment with small cutting resistance, good chip removal and breaking performance and good hole wall roughness is provided, and becomes the basic appeal of the technical personnel in the field.

Disclosure of Invention

In order to overcome the deficiency in the background art, the utility model discloses an indexable drilling blade.

In order to realize the purpose, the utility model adopts the following technical scheme:

an indexable drilling insert comprises an indexable insert, wherein the indexable insert is a W-shaped indexable hard alloy insert and is provided with a central hole;

the surface of the indexable insert is provided with a convex boss plane, the edge of the convex boss plane is in a tooth shape, the tooth shape is formed by connecting a plurality of arc sections end to end, and a chip breaker groove is formed between each arc section and the cutting edge of the indexable insert;

the center hole of the indexable insert is taken as the center, the axis B, the axis A and the axis C divide the indexable insert into A, B, C equally-divided regions, the vertical line from the center of the center hole to the lower edge of the indexable insert is taken as the axis A, the axis B and the axis C are symmetrically arranged along the upward extension line of the axis A, the three regions have the same structure, each region is internally provided with two cutting edges and a smoothing edge in transitional connection between the two cutting edges, the upward extension line of the axis A divides the region A into a symmetrical left side surface and a right side surface, and arcs at the edges of the left side surface and the right side surface are provided with four sections and are symmetrically arranged;

two groups of spherical bumps A, spherical bumps B, spherical bumps C, spherical bumps D and spherical bumps E which are symmetrically arranged are arranged in the chip breaker groove in any one area, the spherical bumps A, the spherical bumps B, the spherical bumps C, the spherical bumps D and the spherical bumps E are arranged at intervals, the spherical centers of the spherical bumps A, the spherical bumps B, the spherical bumps C and the spherical bumps D are collinear, the connecting line of the spherical centers of each group of spherical bumps is respectively arranged in parallel with the edge line of the corresponding cutting edge, and the spherical center of the spherical bump E is superposed with the axis C.

The width of the cutting edge of the indexable drilling blade is 0.1-0.15mm, the included angle between the rake face and the boss plane is a rake angle, the rake angle value is 15-20 degrees, the groove depth value of the chip breaker groove is 0.08-0.11mm, and the groove depth is the vertical distance between the groove bottom plane and the cutting edge plane.

The included angles among the axes A, B and C of the indexable drilling insert are all 120 degrees.

In the indexable drilling blade, the radius value of the circular arc section in the A, B, C area is 0.4-0.7mm, and the distance between the centers of adjacent circular arc sections is 1-1.3 mm.

The radius value of the spherical salient point A of the indexable drilling blade is 0.3-0.6mm, the radius values of the spherical salient point B, the spherical salient point C and the spherical salient point D are the same and are 0.4-0.8mm, and the radius value of the spherical salient point D is 0.6-1 mm.

In the indexable drilling blade, the vertical distance from the spherical center of each group of spherical salient point A, spherical salient point B, spherical salient point C and spherical salient point D to the corresponding cutting edge plane in the same region is 0.2-0.3 mm; the vertical distance from the spherical center of the spherical convex point E to the plane of the cutting edge is 0.3-0.4 mm.

The ball center connecting line of each group of spherical salient points B, C and D in the same region of the indexable drilling blade is parallel to the edge line of the corresponding cutting edge, and the distance value is 0.45-0.62 mm.

The length distance of the convex point sphere center connecting line arranged at the tool tip of the indexable drilling blade is 0.75-0.95 mm.

Since the technical scheme is used, the utility model discloses following beneficial effect has:

the indexable drilling blade of the utility model is provided with the convex boss planes at the edges of the convex boss planes which are tooth-shaped and are arranged on the front and back surfaces of the indexable drilling blade, and the convex boss planes are connected end to end by a plurality of arc sections, so that the widths of the chip breaking grooves are different, the deformation degree of chips can be greatly increased, the chips can be broken, and the chips can be removed; the utility model discloses a parameter and chip breaker structure to the chip breaker improve to reach the purpose that product cutting resistance is little, the chip removal chip breaker is good, the pore wall roughness is good.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

3 FIG. 3 2 3 is 3 a 3 cross 3- 3 sectional 3 view 3 A 3- 3 A 3 of 3 FIG. 3 1 3; 3

FIG. 3 is an enlarged view at A in FIG. 2;

in the figure: 1. spherical salient point spherical center; 2. spherical salient points E; 3. spherical salient points D; 4. spherical salient points C; 5. spherical salient points B; 6. spherical salient points A; 7. an axis C; 8. an axis A; 9. an axis B; 10. a cutting edge line; 11. a circular arc section; 12. a cutting edge; 13. smoothing the edge; 14. a chip breaker groove; 15. a tool point; 16. a boss plane; 17. a groove bottom plane; 18. a rake face; 19. and (5) returning scraps.

Detailed Description

The invention will be explained in more detail by the following examples, which disclose the invention and are intended to protect all technical improvements within the scope of the invention.

The indexable drilling insert described in connection with fig. 1-3 comprises an indexable insert, which is a W-shaped indexable cemented carbide insert with a central hole;

a convex boss plane 16 with a tooth shape at the edge is arranged on the surface of the indexable insert, the tooth shape is formed by connecting a plurality of arc sections 11 end to end, and a chip breaker groove 14 is formed between the arc sections 11 and the cutting edge 12 of the indexable insert;

the center hole of the indexable insert is taken as a center, the axis B9, the axis A8 and the axis C7 divide the indexable insert into A, B, C three equal-divided regions, the vertical line from the center of the center hole to the lower edge of the indexable insert is taken as the axis A8, the axis B9 and the axis C7 are symmetrically arranged along the upward extension line of the axis A8, the three regions are identical in structure, two cutting edges 12 and a smoothing edge 13 in transition connection between the two cutting edges 12 are arranged in each region, the upward extension line of the axis A8 divides the region A into a symmetrical left side surface and a right side surface, and arcs at the edges of the left side surface and the right side surface are provided with four sections and are symmetrically arranged;

two groups of spherical salient points A6, spherical salient points B5, spherical salient points C4, spherical salient points D3 and spherical salient points E2 which are symmetrically arranged are arranged in the chip breaker 14 in any one region, the spherical salient points A6, the spherical salient points B5, the spherical salient points C4, the spherical salient points D3 and the spherical salient points E2 are arranged at intervals, the spherical centers of the spherical salient points A6, the spherical salient points B5, the spherical salient points C4 and the spherical salient points D3 are collinear, the spherical center connecting line of each group of spherical salient points is respectively arranged in parallel with the corresponding cutting edge line 10, and the spherical center of the spherical salient point E2 is coincided with the axis C7.

In the indexable drilling insert, the width of the cutting edge 12 is 0.1-0.15mm, an included angle between a rake face 18 and a boss plane 16 is a rake angle, the rake angle value is 15-20 degrees, the groove depth of the chip breaker groove 14 is 0.08-0.11mm, and the groove depth is the vertical distance between a groove bottom plane 17 and the plane of the cutting edge 12.

The included angles among the axis A8, the axis B7 and the axis C9 of the indexable drilling insert are all 120 degrees.

In the indexable drilling insert, the radius values of the circular arc sections 11 in the A, B, C area are all 0.4-0.7mm, and the circle center distance between the adjacent circular arc sections 11 is 1-1.3 mm.

The radius value of the spherical salient point A of the indexable drilling blade is 0.3-0.6mm, the radius values of the spherical salient point B, the spherical salient point C and the spherical salient point D are the same and are 0.4-0.8mm, and the radius value of the spherical salient point D is 0.6-1 mm;

in the indexable drilling blade, the vertical distance from the spherical center of each group of spherical convex point A2, spherical convex point B3, spherical convex point C4 and spherical convex point D5 to the plane of the corresponding cutting edge 12 in the same region is 0.2-0.3 mm; the perpendicular distance from the spherical center of the spherical convex point E6 to the plane of the cutting edge is 0.3-0.4 mm.

In the indexable drilling blade, the connecting line of the spherical centers of the spherical convex points B, the spherical convex points C and the spherical convex points D in each group in the same region is parallel to the edge line 10 of the corresponding cutting edge, and the distance value is 0.45-0.62 mm.

The length distance of the convex point sphere center connecting line of the indexable drilling blade arranged at the tool nose 15 is 0.75-0.95 mm.

Implement the indexable drilling blade of the utility model, the indexable blade appearance that the utility model adopts is W type indexable carbide blade, is equipped with the centre bore, the surface of the indexable blade is equipped with boss plane 16, the outer edge size of boss plane 16 is less than the outer edge size of the indexable blade, the edge of boss plane 16 is connected end to end by a plurality of circular arc sections 11, on the surface of the indexable blade, form chip breaker groove 14 between a plurality of circular arc sections 11 and cutting edge 12 of the indexable blade, interval is equipped with a plurality of spherical bumps in chip breaker groove 14, a plurality of spherical bumps all have spherical bump centre of sphere 1;

the center hole of the indexable insert is taken as a center, the axis B9, the axis A8 and the axis C7 divide the indexable insert into A, B, C three equal areas, the three areas are all designed uniformly, as shown in FIG. 1, the upward extension line of the axis A8 can divide the area A into a left side surface and a right side surface which are symmetrical, and the arc sections at the edges of the left side surface and the right side surface are provided with four sections and are symmetrically arranged; similarly, the extension line of the axis C7 divides the area B into two symmetrical surfaces, the extension line of the axis B9 divides the area C into two symmetrical surfaces, and the two surfaces are provided with four arc sections 11 and are symmetrically arranged;

A. the radius values of the circular arc sections 11 in the B, C area are all 0.4-0.7mm, and the circle center distance between the adjacent circular arc sections 11 is 1-1.3 mm; the radius value of the spherical salient point A is 0.3-0.6mm, the radius values of the spherical salient point B, the spherical salient point C and the spherical salient point D are the same and are 0.4-0.8mm, and the radius value of the spherical salient point D is 0.6-1 mm; the vertical distance from the spherical center of each group of the spherical salient point A2, the spherical salient point B3, the spherical salient point C4 and the spherical salient point D5 in the same region to the plane of the corresponding cutting edge 12 is 0.2-0.3 mm; the vertical distance from the spherical center of the spherical salient point E6 to the plane of the cutting edge is 0.3-0.4 mm; the connecting line of the spherical centers of the spherical salient points B, C and D in each group in the same region is parallel to the corresponding edge line 10 of the cutting edge, and the distance value is 0.45-0.62 mm. The length distance of the convex point sphere center connecting line arranged at the tool nose part 15 is 0.75-0.95 mm.

As shown in fig. 3, the width of the cutting edge 12 is 0.1-0.15mm, the included angle between the rake face 18 and the boss plane 16 is a rake angle, the rake angle value is 15-20 °, the groove depth of the chip breaker 14 is 0.08-0.11mm, the groove depth is the perpendicular distance between the groove bottom plane 17 and the cutting edge 12 plane, the side surface of the boss plane 16 is a chip return surface 19, and the plurality of arc sections 11 are connected end to end, so that the width of the chip breaker is different, the deformation degree of chips can be greatly increased, the chip breaking is facilitated, and the chip removal is facilitated.

The part of the utility model not detailed is prior art.

The embodiments selected for the purpose of disclosing the invention, are presently considered to be suitable, it being understood, however, that the invention is intended to cover all variations and modifications of the embodiments, which fall within the scope of the concept and the utility model.

Claims

1. The indexable drilling insert comprises an indexable insert, wherein the indexable insert is a W-shaped indexable hard alloy insert and is provided with a central hole, and the indexable drilling insert is characterized in that: the surface of the indexable insert is provided with a convex boss plane, the edge of the convex boss plane is in a tooth shape, the tooth shape is formed by connecting a plurality of arc sections end to end, and a chip breaker groove is formed between each arc section and the cutting edge of the indexable insert;

2. The indexable drilling insert of claim 1 wherein: the width of the cutting edge is 0.1-0.15mm, the included angle between the rake face and the boss plane is a rake angle, the rake angle value is 15-20 degrees, the groove depth value of the chip breaker groove is 0.08-0.11mm, and the groove depth is the vertical distance between the groove bottom plane and the cutting edge plane.

3. The indexable drilling insert of claim 1 wherein: the included angles among the axis A, the axis B and the axis C are all 120 degrees.

4. The indexable drilling insert of claim 1 wherein: A. the radius values of the circular arc sections in the B, C area are all 0.4-0.7mm, and the distance between the centers of adjacent circular arc sections is 1-1.3 mm.

5. The indexable drilling insert of claim 1 wherein: the radius value of the spherical salient point A is 0.3-0.6mm, the radius values of the spherical salient point B, the spherical salient point C and the spherical salient point D are the same and are 0.4-0.8mm, and the radius value of the spherical salient point D is 0.6-1 mm.

6. The indexable drilling insert of claim 1 wherein: the vertical distance from the spherical center of each group of spherical salient point A, spherical salient point B, spherical salient point C and spherical salient point D to the corresponding cutting edge plane in the same region is 0.2-0.3 mm; the vertical distance from the spherical center of the spherical convex point E to the plane of the cutting edge is 0.3-0.4 mm.

7. The indexable drilling insert of claim 1 wherein: the sphere center connecting line of each group of spherical salient points B, C and D in the same region is parallel to the edge line of the corresponding cutting edge, and the distance value is 0.45-0.62 mm.

8. The indexable drilling insert of claim 1 wherein: the length distance of the connecting line of the ball centers of the salient points arranged at the cutter point is 0.75-0.95 mm.