CN218396083U

CN218396083U - Drill bit structure with negative angle second grade blade cutting face

Info

Publication number: CN218396083U
Application number: CN202222898514.6U
Authority: CN
Inventors: 陈泽; 肖小明
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-11-01
Filing date: 2022-11-01
Publication date: 2023-01-31
Anticipated expiration: 2032-11-01

Abstract

The utility model discloses a drill bit structure with a negative angle secondary cutting edge cutting surface, wherein a cutting surface for removing a burr is arranged on a front cutter surface; the deburring cutting surface is inclined towards the negative angle direction of the main cutting edge; the starting end of the deburring cutting surface is arranged on an excircle turning point position connected with the auxiliary cutting edge and the main cutting edge, and the tail end of the deburring cutting surface extends to the middle section position of the main cutting edge; can make the drilling processing of soft material realize the effect that the single processing can be shaped, reduce the secondary operation and remove the process of draping over one's shoulders the cutting edge of a knife or a sword, effectual improvement machining efficiency can effectually avoid the hole edge to receive destructive damage simultaneously, improves processingquality.

Description

Drill bit structure with negative angle second grade blade cutting face

Technical Field

The utility model belongs to the technical field of the drilling cutter, a drill bit structure with negative angle degree second grade blade cutting face is related to.

Background

The process of drilling a hole in a solid material with a drill bit is known as drilling. Drilling is one of basic methods for hole machining, and a drill bit of the drilling tool is the most common machining tool for realizing drilling machining, is mainly used for forming holes or machining the surface of the holes, and is mostly a high-speed steel drill bit and a hard alloy drill bit;

in the current industry, aiming at the drilling processing of some relatively soft (relative to common metal processing) material materials, because of the influence of material characteristics, burr flash residue inevitably occurs on the surface of the processing material, which influences the subsequent processing procedure and the appearance of the product, so that the product can not be directly applied subsequently,

in prior art, after the drilling process of soft material is completed, the burr removing process is required to be carried out, so that the processing process is increased, the processing efficiency is influenced, and meanwhile, in the process of removing the burr residue, the cutter is easily contacted with the hole edge, the hole edge is damaged, the defective product is generated, and the subsequent processing process is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model adopts the following technical scheme:

a drill bit structure with a negative-angle secondary cutting edge cutting surface comprises a handle part, a spiral section and a processing part; the machining part at least comprises two drilling parts for realizing hole machining; the drilling portion includes: a rake face and a relief face; the drilling front surface is provided with a main cutting edge and an auxiliary cutting edge; the front knife face is provided with a burr removing cutting face; the deflashing cutting surface is inclined towards the negative angle direction of the main cutting edge; the secondary cutting edge and the main cutting edge are connected to form a secondary cutting edge, the beginning of the burr removing cutting surface is arranged on the position of the secondary cutting edge connected with the secondary cutting edge and the main cutting edge, and the tail end of the burr removing cutting surface extends to the middle section of the main cutting edge.

As a further aspect of the present invention: the range of the negative angle of the deflashing cutting face to the main cutting edge includes but is not limited to: 0 to 2 degrees.

As a further aspect of the present invention: the spiral section is provided with a spirally extending margin, and the rake angle position in the main cutting edge is at least intersected with the bottom line of the margin.

The utility model has the advantages that: aiming at the drilling processing work of soft materials, when the main cutting edge is drilled, the newly added burr cutting surface is used for realizing the contact with the hole edge after the cutting of the main cutting edge, and the burr which is not cut on the hole edge is cut by the burr cutting surface which is inclined towards the negative angle direction of the main cutting edge; can make the drilling processing of soft material realize the effect that the single processing can be shaped, reduce the secondary operation and remove the process of draping over one's shoulders the cutting edge of a knife or a sword, effectual improvement machining efficiency can effectually avoid the hole edge to receive destructive damage simultaneously, improves processingquality.

Drawings

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

Fig. 2 is a schematic structural view of the drilling part of the present invention.

Detailed Description

The technical solutions in the embodiments of the present application will be described below clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it should be understood that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments, and that the present application is not limited by the exemplary embodiments disclosed and described herein. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as fixed or detachable connections or as an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

The utility model provides a drill bit structure with a negative angle secondary cutting edge cutting surface, which comprises a basic structure of a drill bit consisting of a handle part 1, a spiral section 2 and a processing part 3, and is shown in figures 1-2; wherein realize drilling by processing portion 3, it is concrete, include two drilling portions that are used for realizing spot facing work in the processing portion 3 at least, this structure is for common twolip drill bit structure promptly, and the quantity of drilling portion also can increase according to actual demand, for example: three-edged drill, four-edged drill and the like;

the drilling portion includes: a rake face 34 and a relief face 36; when chips flow out of the spiral groove during machining, the surface of the drill in contact with the chips is the rake surface 34 of the drill; the surface facing the bottom of the hole, called the flank surface 36 of the drill;

the drilling front face is provided with a main cutting edge 35 and an auxiliary cutting edge 31; during machining, the main cutting edge 35 and the auxiliary cutting edge 31 are responsible for main drilling work; the front knife face 34 is provided with a flash removing cutting face 33; the deflasher cutting face 33 is inclined towards the negative angle direction of the main cutting edge 35;

the secondary cutting edge 31 and the main cutting edge 35 are connected to form a secondary cutting edge 32, the width distance between the secondary cutting edges 32 on the two sides is equal to the diameter of the processed hole, the beginning of the deflashing cutting surface 33 is arranged on the position of the secondary cutting edge 32 where the secondary cutting edge 31 and the main cutting edge 35 are connected, and the tail end of the deflashing cutting surface extends to the middle section of the main cutting edge 35;

in the drilling work of soft material, when the main cutting edge 35 is drilled, the newly added burr cutting surface 33 will contact with the hole edge after the cutting of the main cutting edge 35, and the uncut burr on the hole edge is cut by the burr removing cutting surface 33 inclined toward the negative angle direction of the main cutting edge 35.

Preferably, the optimum deflection angle of the deflashing cutting face 33 to the negative angle direction of the main cutting edge 35 is 0 to 2 degrees, the contact effect between the deflashing cutting face 33 and the hole edge in the deflection angle is better, the deflashing on the hole edge can be better eliminated, and no destructive damage can be caused to the hole edge.

Further, the helical segment 2 is provided with a spirally extending land 372, and the rake angle position of the main cutting edge 35 intersects at least the bottom line 372 of the land 372, and may also intersect the upper line 372 of the land 372 beyond the bottom line 372.

It should be noted that, the drill bit structure in this application further includes: the basic drill structure of the prior art, such as drill point, helical flute, chisel edge, etc., is not claimed in the present application, so the corresponding description is not necessary in the present application.

It is further 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. The term "comprising", without further limitation, means that the element so defined is not excluded from the group consisting of additional identical elements in the process, method, article, or apparatus that comprises the element.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A drill bit structure with a negative angle secondary cutting edge cutting surface comprises a handle part, a spiral section and a processing part; the machining part at least comprises two drilling parts for realizing hole machining; the drilling portion includes: a rake face and a relief face; a main cutting edge and an auxiliary cutting edge are arranged on the drilling front surface; it is characterized in that the front knife face is provided with a cutting face for removing burrs; the deburring cutting surface is inclined towards the negative angle direction of the main cutting edge;

the secondary cutting edge and the main cutting edge are connected to form a secondary cutting edge, the beginning of the burr removing cutting surface is arranged on the position of the secondary cutting edge connected with the secondary cutting edge and the main cutting edge, and the tail end of the burr removing cutting surface extends to the middle section of the main cutting edge.

2. The drill bit structure with negative secondary edge cutting face as claimed in claim 1 wherein the range of negative angle deviation of the deflashing cutting edge from the negative direction of the main cutting edge includes but is not limited to: 0 to 2 degrees.

3. The drill bit construction having a negative secondary edge cutting face as claimed in claim 1 wherein said helical portion has a helically extending land, and wherein the rake position of the main cutting edge intersects at least the bottom line of the land.