CN218926342U

CN218926342U - Replaceable blade

Info

Publication number: CN218926342U
Application number: CN202223107630.8U
Authority: CN
Inventors: 董辉; 王飞佳; 金安生; 黄海明; 季能; 郁振辉; 姚红飞
Original assignee: ZHEJIANG XINXING TOOLS CO Ltd
Current assignee: ZHEJIANG XINXING TOOLS CO Ltd
Priority date: 2022-11-23
Filing date: 2022-11-23
Publication date: 2023-04-28
Anticipated expiration: 2032-11-23

Abstract

The application relates to a replaceable blade, replaceable blade bottom is provided with central constant head tank and locating surface, and replaceable blade middle part is provided with two screw holes for the symmetrical configuration of replaceable blade central line, characterized by: two sides of the upper part of the replaceable blade are respectively provided with a large circumference cutting edge, a small circumference cutting edge is arranged in front of the large circumference cutting edge, the small circumference cutting edge is arranged behind the small circumference cutting edge, two S-shaped center rear knife faces are symmetrically arranged in the middle of the top of the replaceable blade, a chisel edge apex angle is formed between two center chisel edges, the size of the chisel edge apex angle is between 90 degrees and 160 degrees, and the large circumference cutting edge, the small circumference cutting edge, the S-shaped center rear knife faces and the main cutting edge are symmetrically arranged relative to the center line of the replaceable blade. The drilling centering device is strong in centering capability and good in stability.

Description

Replaceable blade

Technical Field

The application relates to a replaceable blade, which is mainly suitable for drilling work in the machining industry.

Background

The existing market replaces the disposable cutter of the common twist drill, and is divided into a cutter bar and a cutter blade, wherein the cutter blade adopts the existing standard drill point, and under the normal condition of moderate cutting resistance, the cutting is relatively stable, and the cutting effect is good. However, when the power of the equipment is insufficient or the drilling working condition is unstable, the cutting instability condition is easy to generate, so that the processing quality is affected.

Disclosure of Invention

The technical problem that this application solved is to overcome the above-mentioned not enough that exists among the prior art, and provides a removable blade that centering ability is strong, stability is good when drilling.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a interchangeable formula blade, interchangeable formula blade bottom is provided with central constant head tank and locating surface, and interchangeable formula blade middle part is provided with two screw holes for interchangeable formula blade central line symmetry configuration, characterized by: two sides of the upper part of the replaceable blade are respectively provided with a large circumference cutting edge, a small circumference cutting edge is arranged in front of the large circumference cutting edge, the small circumference cutting edge is arranged behind the small circumference cutting edge, two S-shaped center rear knife faces are symmetrically arranged in the middle of the top of the replaceable blade, a chisel edge apex angle is formed between two center chisel edges, the size of the chisel edge apex angle is between 90 degrees and 160 degrees, and the large circumference cutting edge, the small circumference cutting edge, the S-shaped center rear knife faces and the main cutting edge are symmetrically arranged relative to the center line of the replaceable blade. The balance stability is improved by symmetrically arranging the circumference cutting edge margin, the S-shaped center relief surface, the center chisel edge and the main cutting edge on the center line of the replaceable blade; the mutual matching of the two circumference cutting edges which are larger and smaller improves the orientation capability and the stability capability of the application; the S-shaped center rear cutter surface can reduce drilling resistance, improve cutting heat at the center chisel edge, reduce displacement and improve centering capacity; the top angle of the chisel edge is between 90 degrees and 160 degrees, so that the centering force can be enhanced, and the drilling stability can be improved.

The front side and the rear side of the upper part of the replaceable blade are provided with two circular arc pit cuts, so that the effect of chip separation can be achieved, and meanwhile, the strength of the cutting edge is increased.

The utility model provides a interchangeable formula blade upper portion both sides are provided with the circular arc chisel edge coping for interchangeable formula blade central line symmetry configuration, can improve chip removal ability, reduce axial force and torque, chip removal that can be better when feeding greatly.

The two chip breakers symmetrically configured relative to the center line of the replaceable blade are arranged on the front side corner and the rear side corner of the replaceable blade, so that the shape of scrap iron can be controlled, the volume of the scrap iron is reduced, and chip removal is facilitated. The head of each chip breaker groove is provided with a negative chamfer of the cutting edge, the width of the negative chamfer of the cutting edge is between 0.05 and 0.5 millimeter, and the angle of the negative chamfer of the cutting edge is between-10 degrees and-60 degrees, so that the strength of the cutting edge can be improved, and the service life of a cutter can be prolonged.

The middle of the upper part of the replaceable blade is provided with two flutes symmetrically configured relative to the center line of the replaceable blade, and the two flutes symmetrically configured are convenient for discharging chips generated by the center chisel edge and have good stability.

Compared with the prior art, the application has the following advantages and effects: the centering capability is strong and the stability is good during drilling.

Drawings

Fig. 1 is a front view of an embodiment of the present utility model.

Fig. 2 is a view A-A (schematic view of chamfer structure) of fig. 1.

Fig. 3 is an enlarged schematic view at B in fig. 2.

Fig. 4 is a top view of fig. 1.

Fig. 5 is a left side view of fig. 1.

Fig. 6 is a schematic perspective view illustrating a direction of an embodiment of the present utility model.

Fig. 7 is a partial view in the F direction of fig. 6.

Fig. 8 is a D-direction view of fig. 1.

Fig. 9 is a partial view at E of fig. 8.

Fig. 10 is a schematic perspective view illustrating another direction according to an embodiment of the present application.

In the figure: the cutting insert comprises a central positioning groove 1, screw holes 2, a circumferential cutting edge margin 3, a large circumferential cutting edge margin 31, a small circumferential cutting edge margin 32, an arc pit notch 4, a chip flute 5, a positioning surface 6, a chip breaker 7, a cutting edge negative chamfer 8,S type central relief surface 9, a chisel edge apex angle theta, an angle alpha of the cutting edge negative chamfer, a replaceable insert center line 10, a large arc chisel edge sharpening 11, a central chisel edge 15, a main cutting edge 16 and a base surface 17 of the replaceable insert (the base surface refers to a plane passing through a cutting edge selected point and being perpendicular to a cutting direction).

Detailed Description

The present application is further described in detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present application and not limited to the following examples. The directions described herein are relative to fig. 1 unless specifically indicated.

Referring to fig. 1-10, an embodiment of the present application is a replaceable blade: the bottom of the replaceable blade is provided with a central positioning groove 1 and a positioning surface 6, the middle of the replaceable blade is provided with two screw holes 2 which are symmetrically configured relative to the central line of the embodiment, and the central positioning groove 1, the screw holes 2 and the positioning surface 6 are used for positioning connection with a cutter bar.

The embodiment of the application mainly comprises the following design points:

the two sides of the upper part of the replaceable blade are provided with a large circumferential cutting edge zone 3 and a small circumferential cutting edge zone 3, wherein the large circumferential cutting edge zone 31 is positioned in front (positioned in front of the cutting direction) and has a guiding function; the small circumferential cutting margin 32 is rearward (located rearward in the cutting direction) and has a supporting function; the small circumferential cutting edge 32 acts to stabilize the drill bit as it drills through or has intersecting holes therethrough.

The front side and the rear side of the upper part of the replaceable blade are provided with two circular arc pit cuts 4, so that the effect of chip separation can be achieved, and meanwhile, the strength of the cutting edge is increased.

The two symmetrical chip grooves 5 are arranged in the middle of the upper part of the replaceable blade, and the chip produced by the central chisel edge 15 is convenient to discharge (the discharge directions are opposite and are not easy to interfere with each other) and has good stability.

The two chip breakers 7 symmetrically configured relative to the center line 10 of the replaceable blade are arranged on the front and rear side corners of the replaceable blade, so that the shape of scrap iron can be controlled, the volume of the scrap iron is reduced, and chip removal is facilitated. The nose of each chip breaker groove 7 is provided with a negative cutting edge chamfer 8, the width L of the negative cutting edge chamfer 8 is between 0.05 and 0.5 millimeter, the angle alpha of the negative cutting edge chamfer 8 (the included angle between the base surface 17 and the negative cutting edge chamfer 8) is usually between-10 degrees and-60 degrees, the strength of the cutting edge can be improved, and the service life of a cutter can be prolonged.

The middle symmetry of this application interchangeable blade top sets up two S type center back knife faces 9, two center chisel edge 15, and S type center back knife face 9 can reduce drilling resistance, improves the cutting heat of center chisel edge 15 department, and two center chisel edge 15 form chisel edge apex angle theta, reduces the displacement and improves the ability of centering.

The replaceable blade is provided with a chisel edge angle θ in the middle of the upper part, the chisel edge angle θ being the angle between the two center chisel edges 15 (see fig. 6). The angle theta of the chisel edge is between 90 degrees and 160 degrees, the angle theta of the chisel edge is more optimally between 120 degrees and 150 degrees, the centering force can be enhanced, and the drilling stability is improved.

The utility model provides a interchangeable formula blade upper portion both sides are provided with and grind 11 for interchangeable formula blade central line 10 symmetrical configuration's circular arc chisel edge, can improve chip removal ability, reduce axial force and torque, can better chip removal when feeding greatly.

All simple variations or combinations of technical solutions and technical features of the embodiments of the present utility model should be considered as falling within the protection scope of the present utility model.

Claims

1. The utility model provides a interchangeable formula blade, interchangeable formula blade bottom is provided with central constant head tank and locating surface, and interchangeable formula blade middle part is provided with two screw holes for interchangeable formula blade central line symmetry configuration, characterized by: two sides of the upper part of the replaceable blade are respectively provided with a large circumference cutting edge, a small circumference cutting edge is arranged in front of the large circumference cutting edge, the small circumference cutting edge is arranged behind the small circumference cutting edge, two S-shaped center rear knife faces are symmetrically arranged in the middle of the top of the replaceable blade, a chisel edge apex angle is formed between two center chisel edges, the size of the chisel edge apex angle is between 90 degrees and 160 degrees, and the large circumference cutting edge, the small circumference cutting edge, the S-shaped center rear knife faces and the main cutting edge are symmetrically arranged relative to the center line of the replaceable blade.

2. The replaceable blade of claim 1, wherein: the front side and the rear side of the upper part of the replaceable blade are provided with two circular arc pit cuts.

3. The replaceable blade of claim 1, wherein: and the two sides of the upper part of the replaceable blade are provided with large arc chisel edges which are symmetrically arranged relative to the center line of the replaceable blade.

4. The replaceable blade of claim 1, wherein: two chip breakers symmetrically arranged relative to the center line of the replaceable blade are arranged on the front side corner and the rear side corner of the replaceable blade, the head of each chip breaker is provided with a negative cutting edge chamfer, the width of the negative cutting edge chamfer is between 0.05 and 0.5 millimeter, and the angle of the negative cutting edge chamfer is between-10 degrees and-60 degrees.

5. The replaceable blade of claim 1, wherein: the middle of the upper part of the replaceable blade is provided with two flutes which are symmetrically arranged relative to the center line of the replaceable blade.