CN210877727U

CN210877727U - Double-side limiting obliquely-penetrating locking replaceable drill point

Info

Publication number: CN210877727U
Application number: CN201921942655.5U
Authority: CN
Inventors: 刘伟
Original assignee: Suzhou Woti Industrial Technology Co ltd
Current assignee: Suzhou Woti Industrial Technology Co ltd
Priority date: 2019-11-12
Filing date: 2019-11-12
Publication date: 2020-06-30
Anticipated expiration: 2029-11-12

Abstract

The utility model relates to a double-sided limiting obliquely-penetrating locking replaceable drill point, the lower part of which is provided with a first limiting surface and a second limiting surface to form a dovetail structure with a narrow top and a wide bottom; the lower end of the drill rod mounting structure is provided with a first positioning surface and a second positioning surface which are V-shaped and matched with the two bottom surfaces of the drill rod mounting structure, so that the replaceable drill tip and the drill rod are coaxial by a common axis CL; a fastening through hole is arranged at a position close to the center of the solid body, and the fastening through hole is orthogonal to the axis CL; the replaceable drill bit is provided with a first cutting edge and a second cutting edge, and the uppermost end of the replaceable drill bit extends from the central axis CL to the maximum diameter positions on two sides; the left side and the right side are provided with a first edge and a second edge. The lower part of the replaceable drill point is provided with a V-shaped positioning surface which is matched with the V-shaped positioning structure of the drill rod to ensure that the positioning surface is coaxial with the common axis CL; two spacing faces form the forked tail structure of width under the narrow, prevent that interchangeable drill point from taking off from the drilling rod pine through stop screw rather than butt. And a fastening through hole is formed, and the replaceable drill point is stably fixed on the drill rod through a fastening screw.

Description

Double-side limiting obliquely-penetrating locking replaceable drill point

Technical Field

The utility model relates to a two-sided spacing lock interchangeable drill point of wearing to one side belongs to cutting tool technical field.

Background

In the current hole processing technology, a hard alloy drill bit is widely adopted, but in the large-diameter drilling processing, the whole hard alloy drill bit is expensive in manufacturing cost; especially in high-speed and high-efficiency drilling, the manufacturing cost of the internal-cooling type integral hard alloy drill bit is higher, and the drill bit is an inevitable technical path for low-cost processing. The prior art scheme has the following defects:

for example, PCT/IL2005/000999 discloses a "cutting tool, cutting head and cutting tool assembly" which, when applied to a drilling tool, presents the problem of the shank receiving portion being too thin, and the clamping force being reduced after multiple drill tip changes, thereby leading to bit failure.

Chinese patent No. 201510252190.0 discloses a "drill bit with replaceable bit type structure", which is positioned by a pin and fastened by a screw on the lateral side of the pin. There is also a problem that the mounting portion of the blade holder is structurally thin.

Chinese patent No. 201710517688.4 discloses a "high stability self-centering drill bit" which is mounted on a tool holder by rotational locking using a pin for positioning. The mounting mode is accurate in positioning, but the biggest problem is that the mounting part of the cutter bar is single-thin in structure, fatigue is easy to occur after multiple clamping, and the situation that the clamping force is reduced to further cause the failure of the drill bit with the replaceable drill point exists.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough of prior art existence, provide a two-sided spacing to wear to lock interchangeable drill point to one side, the mountable makes up into two-sided spacing locking formula drill bit that trades that draws to one side on interchangeable drill point drilling rod for carry out drilling processing.

The purpose of the utility model is realized through the following technical scheme:

the double-sided limiting obliquely-penetrating locking replaceable drill point is characterized in that the replaceable drill point is centrosymmetric in 360 degrees around an axis CL, the lower part of the replaceable drill point is provided with a sheet structure of a first limiting surface and a second limiting surface, and the first limiting surface and the second limiting surface form a dovetail structure with a narrow top and a wide bottom;

the lower end of the drill rod mounting structure is provided with a first positioning surface and a second positioning surface, the first positioning surface and the second positioning surface are V-shaped, and the V-shaped first positioning surface and the V-shaped second positioning surface are matched with two bottom surfaces of the drill rod mounting structure, so that the replaceable drill point and the drill rod are coaxial by a common axis CL;

a fastening through hole is arranged at a position close to the center of the solid body, and the fastening through hole is orthogonal to the axis CL;

the replaceable drill point is arranged on the center of the central axis CL, and is provided with a first cutting edge and a second cutting edge which are distributed in a 360-degree central symmetry mode according to the central axis CL;

the left side and the right side are provided with a first edge and a second edge, and the first edge and the second edge are parts of the outermost edge imaginary cylinder of the first cutting edge and the second cutting edge, have width and are spiral.

Further, the replaceable drill point is locked in a double-sided limiting and obliquely penetrating mode, wherein the included angle between the first positioning surface and the second positioning surface ranges from 120 degrees to 140 degrees.

Further, the replaceable drill point is locked in a double-sided limiting and obliquely penetrating mode, wherein the fastening through hole and the first mounting surface or the second mounting surface form an included angle of 50-70 degrees in an inclined mode.

Further, the replaceable drill point is locked in a double-sided limiting and obliquely penetrating mode, wherein the first cutting edge and the second cutting edge are linear, arc or space curve shapes suitable for cutting.

Further, the replaceable drill point is locked in the double-sided limiting inclined penetrating mode, wherein the outermost edge tangent line of the first edge and the outermost edge tangent line of the second edge form a spiral angle with the axis CL, and the spiral angle ranges from 15 degrees to 35 degrees.

Further, the changeable drill point is locked in the two-sided limiting inclined penetrating mode, wherein the width of the first edge and the width of the second edge are 0.05-0.1 times of the diameter of the changeable drill point.

Further, the changeable drill point is locked in the spacing wearing to one side of foretell two-sided, and wherein, the distance of first edge and second edge in axis CL's direction is edge length, and edge length is 0.3 ~ 1.0 times of changeable drill point diameter.

Further, the replaceable drill tip is locked in a double-sided limiting and obliquely penetrating mode, wherein a first chip groove and a second chip groove are formed in the position, adjacent to the first cutting edge and the second cutting edge, of the first edge and the second edge, and the first chip groove and the second chip groove are formed in the position, with the first edge and the second edge as edges; the first chip flute and the second chip flute are formed by a first cutting edge and a second cutting edge which naturally extend along the first edge and the second edge in a spiral mode on the basis of the axis CL on the replaceable drill point.

Compared with the prior art, the utility model have apparent advantage and beneficial effect, the concrete aspect that embodies is in following:

① the utility model has simple structure, accurate positioning, reliable fastening, and V-shaped positioning surface at the lower part of the replaceable drill tip, which has the same angle with the V-shaped positioning structure of the drill rod and can be matched with the V-shaped positioning structure, and after installation, the replaceable drill tip and the drill rod have a common axis CL to ensure that the replaceable drill tip and the drill rod are coaxial with the common axis CL;

② the replaceable drill points are distributed in 360 degree central symmetry according to the axis CL, and have two limiting surfaces which form a dovetail structure with narrow top and wide bottom, when in installation, the replaceable drill points are prevented from loosening from the drill rod by the abutting of the limiting screws;

③ fastening through holes are arranged at the position of the replaceable drill tip near the center of the solid body, the replaceable drill tip is stably fixed on the drill rod through fastening screws, and the replaceable drill tip and the drill rod are distributed in a sandwich manner and are firmly connected to form a whole;

④ the cutting is smooth when working according to the CCW direction, the material trade mark and the geometrical character of different replaceable drill points can be selected according to the workpiece material, the processing cost is low, the economy is good.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1: the utility model can change the front view of the drill point;

FIG. 2: the utility model can change the side view of the drill point;

FIG. 3: the utility model can change the local side assembly drawing of the drill point;

FIG. 4: the utility model is assembled with an X-X sectional view;

FIG. 5: the utility model is a top view of a replaceable drill point;

FIG. 6: the utility model is a partial three-dimensional assembly drawing;

FIG. 7: the utility model discloses the assembly relation sketch map of interchangeable drill point.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the directional terms and the sequence terms and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.

As shown in fig. 1, 2 and 3, the replaceable drill tip is locked in a double-sided limiting and obliquely penetrating manner, is centrosymmetric in 360 degrees around an axis CL, and has a sheet structure with a first limiting surface 204A and a second limiting surface 204B at the lower part, the first limiting surface 204A and the second limiting surface 204B form a dovetail structure with a narrow top and a wide bottom, and a first mounting surface 207A or a second mounting surface 207B which are parallel to each other are arranged at the front side and the rear side of the sheet structure; during installation, the first limiting screw 400A and the second limiting screw 400B are screwed into the first limiting screw hole 104A and the second limiting screw hole 104B of the drill rod 100 and are in abutting contact with the first limiting surface 204A and the second limiting surface 204B, so that the replaceable drill tip 200 is prevented from loosening;

the lower end of the drill rod mounting structure is provided with a first positioning surface 205A and a second positioning surface 205B, the first positioning surface 205A and the second positioning surface 205B are V-shaped, the included angle between the first positioning surface 205A and the second positioning surface 205B is 120-140 degrees, and the V-shaped first positioning surface 205A and the V-shaped second positioning surface 205B are matched with the two bottom surfaces of the drill rod mounting structure, so that the replaceable drill tip 200 and the drill rod are coaxial with each other by a common axis CL.

As shown in fig. 1 and 4, a fastening through hole 206 is provided near the center of the solid, and the fastening through hole 206 is orthogonal to the axis CL; the fastening through hole 206 and the first mounting surface 207A or the second mounting surface 207B form an included angle of 50-70 degrees; the replaceable drill tip 200 is stably fixed on the drill rod 100 through the fastening screw 300, and the replaceable drill tip 200 and the drill rod 100 are distributed in a sandwich mode and are firmly connected and integrated into a whole.

As shown in fig. 1 and 5, the first cutting edge 202A and the second cutting edge 202B are arranged in a 360 ° central symmetrical distribution according to the axis CL, and perform a cutting action during operation, the first cutting edge 202A and the second cutting edge 202B extend from the axis CL to the maximum diameter positions on both sides from the uppermost end of the replaceable drill tip 200, and the first cutting edge 202A and the second cutting edge 202B are in a shape of a straight line, an arc or a space curve adapted to the cutting action;

as shown in fig. 2 and 5, a first edge 201A and a second edge 201B are provided on the left and right sides, and the first edge 201A and the second edge 201B are parts of an imaginary cylinder of the outermost edges of the first cutting edge 202A and the second cutting edge 202B, have a width, and are in a spiral shape; the outermost edge tangents of the first edge 201A and the second edge 201B form a helix angle 220 with the axis CL, and the helix angle 220 is 15-35 degrees; the width of the first edge 201A and the second edge 201B is 0.05-0.1 times of the diameter of the replaceable drill tip 200, the distance between the first edge 201A and the second edge 201B in the direction of the axis CL is the edge length, and the edge length is 0.3-1.0 times of the diameter of the replaceable drill tip 200.

As shown in fig. 1, 2 and 6, adjacent to the first cutting edge 202A and the second cutting edge 202B, a first chip groove 203A and a second chip groove 203B are provided, with the first edge 201A and the second edge 201B as edges; the first chip flute 203A and the second chip flute 203B are the natural extension of the first cutting edge 202A and the second cutting edge 202B on the exchangeable drill tip 200 with reference to the axis CL in a spiral manner and following the first edge 201A and the second edge 201B.

As shown in fig. 6 and 7, the replaceable drill tip 200 is retained by the first and

second retaining screws

400A and 400B, the first and second

retaining screws

400A and 400B are screwed into the first and second retaining screw holes 104A and 104B of the drill rod 100, abut against the first and

second retaining surfaces

204A and 204B, and the replaceable drill tip 200 is stably fixed to the drill rod 100 by the fastening screws 300.

The lower portion of the interchangeable drill tip 200 has a V-shaped locating feature, namely a first locating surface 205A and a second locating surface 205B, the first locating surface 205A and the second locating surface 205B being spatially angled and engageable with the first bottom surface 110A and the second bottom surface 110B of the mounting feature 102 of the drill rod 100. After installation, the interchangeable drill tip 200 and the drill rod 100 share a common axis CL, ensuring that during operation the interchangeable drill tip 200 and the drill rod 100 rotate as a whole in the CCW direction about the common axis CL.

To sum up, the utility model discloses the structure is succinct, and the location is accurate, and the fastening is reliable, and the lower part of interchangeable drill point has the V-arrangement locating surface, and is the same and can cooperate with the V-arrangement location structure space angle of drilling rod, and the installation back, interchangeable drill point and drilling rod possess common axis CL, ensure that interchangeable drill point and drilling rod are coaxial with common axis CL.

The interchangeable drill point is 360 central symmetric distributions according to axis CL, has two spacing faces, and two spacing faces form under the narrow wide forked tail structure, during the installation, prevent through stop screw rather than butt that the interchangeable drill point from the drilling rod pine and take off.

The position that is close entity central authorities of interchangeable point of drill is provided with the fastening via hole, fixes the interchangeable point of drill on the drilling rod through fastening screw steadily, and the interchangeable point of drill is "sandwich" distribution with the drilling rod, and firm in connection just becomes a whole.

The cutting is carried out according to the CCW rotating direction during the work, and the cutting is stable. In the implementation example, different material marks and geometric characteristics of the replaceable drill point can be selected according to the material of the workpiece; has the advantages of low processing cost, good economy and the like.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Claims

1. Two-sided spacing lock interchangeable drill point of wearing to one side, its characterized in that: the dovetail structure is in central symmetry of 360 degrees around an axis CL, the lower part of the dovetail structure is provided with a first limiting surface (204A) and a second limiting surface (204B), and the first limiting surface (204A) and the second limiting surface (204B) form a dovetail structure with a narrow top and a wide bottom;

the lower end of the replaceable drill point (200) is provided with a first positioning surface (205A) and a second positioning surface (205B), the first positioning surface (205A) and the second positioning surface (205B) are V-shaped, and the V-shaped first positioning surface (205A) and the V-shaped second positioning surface (205B) are matched with two bottom surfaces of the drill rod mounting structure, so that the replaceable drill point (200) and the drill rod are coaxial by a common axis CL;

a fastening through hole (206) is arranged at a position close to the center of the solid, and the fastening through hole (206) is orthogonal to the axis CL;

the replaceable drill point is centrally and symmetrically distributed in 360 degrees according to an axis CL, and is provided with a first cutting edge (202A) and a second cutting edge (202B), wherein the first cutting edge (202A) and the second cutting edge (202B) extend from the central axis CL to the maximum diameter positions at two sides by the uppermost end of the replaceable drill point (200);

the left side and the right side are provided with a first edge (201A) and a second edge (201B), the first edge (201A) and the second edge (201B) are parts of an imaginary cylinder of the outermost edges of the first cutting edge (202A) and the second cutting edge (202B), have width and are spiral.

2. The double-sided limiting obliquely penetrating locking replaceable drill tip as claimed in claim 1, wherein: the included angle between the first positioning surface (205A) and the second positioning surface (205B) is 120-140 degrees.

3. The double-sided limiting obliquely penetrating locking replaceable drill tip as claimed in claim 1, wherein: the fastening through hole (206) and the first mounting surface (207A) or the second mounting surface (207B) form an included angle of 50-70 degrees.

4. The double-sided limiting obliquely penetrating locking replaceable drill tip as claimed in claim 1, wherein: the first cutting edge (202A) and the second cutting edge (202B) are linear, circular, or spatially curvilinear in shape to accommodate the cutting action.

5. The double-sided limiting obliquely penetrating locking replaceable drill tip as claimed in claim 1, wherein: the outermost tangent of the first edge (201A) and the second edge (201B) forms a helix angle (220) with the axis CL, and the helix angle (220) is 15-35 degrees.

6. The double-sided limiting obliquely-penetrating locking replaceable drill tip as claimed in claim 1 or 5, wherein: the width of the first edge (201A) and the width of the second edge (201B) are 0.05-0.1 times of the diameter of the replaceable drill point (200).

7. The double-sided limiting obliquely-penetrating locking replaceable drill tip as claimed in claim 1 or 5, wherein: the distance between the first edge (201A) and the second edge (201B) in the direction of the axis CL is the edge length which is 0.3-1.0 times of the diameter of the replaceable drill tip (200).

8. The double-sided limiting obliquely penetrating locking replaceable drill tip as claimed in claim 1, wherein: a first chip groove (203A) and a second chip groove (203B) are arranged adjacent to the first cutting edge (202A) and the second cutting edge (202B) and take the first edge (201A) and the second edge (201B) as edges; the first chip flute (203A) and the second chip flute (203B) are formed by a first cutting edge (202A) and a second cutting edge (202B) which naturally extend along the first edge (201A) and the second edge (201B) in a spiral mode on the replaceable drill point (200) by taking the axis CL as a reference.