阅读说明：本技术 一种纤维增强复合材料钻头 (Fiber reinforced composite drill bit ) 是由 程谟力 王振国 吕涛 龙重旺 于 2021-10-09 设计创作，主要内容包括：本发明涉及制孔加工技术领域,公开了一种纤维增强复合材料钻头,包括：依次设置的柄部、切削部与钻尖,所述钻尖上依次设有第一回勾刃与第二回勾刃,所述第一回勾刃与所述第二回勾刃沿所述钻尖的轴向间隔设置并呈上下交错分布于所述钻尖的周向。通过钻尖与切削部的切削作用,对叠层材料进行钻孔加工,由于第一回勾刃与第二回勾刃沿钻尖的轴向间隔设置并呈上下交错分布于钻尖的周向,进而提供了一种纤维增强复合材料钻头,可实现毛刺的分级去除,提升了复材加工质量,同时保证钻尖的切削能力和加工过程的稳定性,消除了钻孔过程中的卡钻现象及钻出孔时的前冲现象。(The invention relates to the technical field of drilling processing, and discloses a fiber reinforced composite drill bit, which comprises: the drill point is provided with a handle part, a cutting part and a drill point, wherein the drill point is sequentially provided with a first back hook blade and a second back hook blade, the first back hook blade and the second back hook blade are arranged at an axial interval of the drill point and are distributed in the circumferential direction of the drill point in an up-and-down staggered manner. Through the cutting action of drill point and cutting portion, carry out drilling processing to the lamination material, because the first time colludes the sword and the second time colludes the sword and sets up and be crisscross distribution from top to bottom in the circumference of drill point along the axial interval of drill point, and then provides a fiber reinforced composite drill bit, can realize getting rid of in grades of burr, promoted the combined material processingquality, guarantee the cutting ability of drill point and the stability of course of working simultaneously, eliminated the sticking of drill phenomenon among the drilling process and the dash phenomenon when drilling the hole.)

1. A fiber reinforced composite drill bit, comprising: stalk portion (1), cutting part (2) and drill point (3) that set gradually, be equipped with first time on drill point (3) and collude sword (31) and second back and collude sword (32) in proper order, first time collude sword (31) with the second returns and colludes sword (32) and follows the axial interval of drill point (3) sets up and be crisscross distribution from top to bottom in the circumference of drill point (3).

2. The drill bit of claim 1, wherein the number of the first hooking edges (31) is two, and the two first hooking edges (31) are symmetrically distributed on the drill tip (3).

3. The drill bit of fiber reinforced composite material according to claim 1 or 2, wherein the number of the second back-hooking edges (32) is two, and the two second back-hooking edges (32) are symmetrically distributed on the drill tip (3).

4. The drill bit of claim 1, wherein the first re-hooking edge (31) and the second re-hooking edge (32) are symmetrically spaced apart along the axial direction of the drill tip (3).

5. The fiber-reinforced composite drill according to claim 1 or 2, characterized in that the first return edge (31) comprises a first counter edge (311) and a first scraping edge (312) arranged in succession.

6. The drill bit according to claim 1, wherein the second hooking edge (32) comprises a second counter edge (321) and a second scraping edge (322) arranged in sequence.

7. The drill bit of claim 1, characterized in that the drill tip (3) is provided with a main cutting edge (33) and the cutting portion (2) is provided with a secondary cutting edge (21) for cutting engagement with the main cutting edge (33).

8. The fiber reinforced composite drill bit according to claim 7, characterized in that the drill tip (3) is provided with chip flutes.

9. The fiber-reinforced composite drill bit according to claim 1 or 7, characterized in that the cutting portion (2) is helically arranged.

Technical Field

The invention relates to the technical field of hole making processing, in particular to a fiber reinforced composite drill bit.

Background

The novel reinforced composite material represented by the carbon fiber reinforced composite material (CFRP) and the glass fiber reinforced composite material (GFRP) has excellent physical and chemical properties such as light weight, high specific strength, high specific stiffness, corrosion resistance, high temperature resistance and the like, and with the continuous development of the production and forming process, the application of the high-performance composite material in key technical equipment of military, aerospace, ships and ocean engineering in China is accelerated and promoted. The laminated material made of the fiber composite material and the aluminum alloy has the advantages of high strength and hardness of the carbon fiber and toughness of the aluminum alloy, and is typically applied to parts such as fuselages, wings, flaps, vertical tails and the like of latest generation airplanes.

In the initial stage of equipment development, the manual drilling for drilling has higher flexibility than the drilling of a machining center and a mechanical arm, but the operational convenience of the manual drilling limits the machining efficiency of the manual drilling. In addition, the manual drill can not ensure stable cutting processing parameters, and the defects of hole cracks, hole wall scratches and the like are easily caused in the processing process, so that the performance of the component is greatly reduced, and even the component is scrapped. Therefore, the structural design of the manual hole drilling drill bit made of the composite material and the laminated material with high performance and high quality has important significance.

The development of materials brings challenges to the development of processing technology and processing tools, and a plurality of scholars and experts have made relevant development and application to the processing tools of fiber composite materials and laminated materials. "a hand drill bit with back-hooking blade" that jia zheng yuan wai sword proposed, patent application number 201811199427.3, it has related to one kind and has been used for alleviateing the double vertex angle optimal design of the axial force in the drilling process to adopted back-hooking blade structure in order to restrain layering, burr and the tear damage of access & exit in the CFRP course of working, can satisfy the high quality, the high efficiency demand of the manual system hole of CFRP. "laminated material tool and method for machining" by je hei s, patent application No. 201580006976.2, which relates to a tool for machining laminated materials, wherein a cutting edge is segmented, a front end cutting edge is provided with spirally distributed small cutting grooves, a rear end cutting edge is in a variable helix angle structure, and two segments of the cutting edge can realize the adaptive machining of different materials in the laminated materials during the machining process.

In the prior art, the enhancement of the physical and chemical properties of the material can also lead to the increase of the cutting processing difficulty, the processing of the fiber reinforced composite material is easy to generate the processing damages such as layering, tearing and burrs due to the difference of the properties of a microscopic reinforcing phase and a matrix phase of the material, the laminated material aggravates the abrasion of a processing cutter of the fiber reinforced composite material due to the obvious processing interface, and meanwhile, the phenomena of drilling forward punching, drill sticking and the like are very easy to occur in the processing process of the material interface, so that the challenges are brought to the stability and the processing quality of manual hole making.

The structural design of the cutter can meet the basic processing requirements of CFRP and laminated materials, but along with the diversification of equipment materials, the original structure has certain limitations when being applied to the processing of novel fiber composite materials and laminated materials such as CFRP-aluminum alloy laminated materials, and the adaptability of the structure to manual hole processing and the stability of the processing process are also urgently required to be improved.

Therefore, it is an urgent need to solve the above-mentioned problems, how to provide a drill bit made of fiber reinforced composite material, so as to eliminate the drill sticking phenomenon during the drilling process and the forward thrust phenomenon during the drilling process.

Disclosure of Invention

The invention aims to solve the technical problem of how to provide a fiber reinforced composite drill bit to eliminate the phenomenon of drill jamming in the drilling process and the phenomenon of forward thrust in the drilling process.

To this end, according to a first aspect, embodiments of the present invention disclose a fiber reinforced composite drill bit, comprising: the drill point is provided with a handle part, a cutting part and a drill point, wherein the drill point is sequentially provided with a first back hook blade and a second back hook blade, the first back hook blade and the second back hook blade are arranged at an axial interval of the drill point and are distributed in the circumferential direction of the drill point in an up-and-down staggered manner. Through the cutting action of colluding the sword and colluding the sword back with the second in first time, can cut fibre reinforced composite such as CFRP material, because first collude the sword and collude the sword with the second back and follow the axial interval of drill point sets up and be crisscross distribution from top to bottom in the circumference of drill point, can cut in different positions respectively, be different from setting back the sword of colluding among the prior art on a plane, and then can realize getting rid of in grades of burr, also can be better reduce the abrasive action of burr to the drill bit, improve the cutting effect.

The invention is further provided that the number of the first back hooking edges is two, and the two first back hooking edges are symmetrically distributed on the drill point. Because the two first back hook edges are symmetrically distributed on the drill point, the stability of radial stress in the cutting process of the drill bit is ensured.

The invention is further provided that the number of the second back hooking blades is two, and the two second back hooking blades are symmetrically distributed on the drill point. Because the two second back-hooking edges are symmetrically distributed on the drill point, the stability of radial stress in the cutting process of the drill bit is ensured.

The invention is further provided that the first back-hooking blade and the second back-hooking blade can be arranged symmetrically along the axial direction of the drill point at intervals, so that the first back-hooking blade and the second back-hooking blade are in symmetrical positions, graded cutting can be uniformly realized in cutting, and the cutting efficiency is improved, and the number of the first back-hooking blade and the second back-hooking blade can be more than one.

The invention is further provided that the first back-hooking blade comprises a first reverse blade and a first scraping blade which are arranged in sequence. Through the cutting action of first reverse sword and first scraping cutting edge, conveniently get rid of fibre reinforced composite's such as CFRP material burr.

The invention is further provided that the second back hooking edge comprises a second reverse edge and a second scraping edge which are arranged in sequence. Through the cutting action of the second reverse blade and the second scraping blade, burrs of fiber reinforced composite materials such as CFRP materials are conveniently removed.

The invention is further provided that the drill tip is provided with a main cutting edge, and the cutting part is provided with an auxiliary cutting edge which is matched with the main cutting edge in a cutting way. The main cutting edge and the auxiliary cutting edge both have a cutting effect, so that fiber reinforced composite materials such as CFRP materials can be conveniently cut, and further manual hole making is realized.

The invention is further provided that the drill tip is provided with a chip groove. The chip removal groove has the chip removal effect, materials cut by the drill bit are quickly discharged, and drilling of fiber reinforced composite materials such as CFRP materials is facilitated.

The invention is further provided that the cutting portion is arranged spirally. The cutting part plays a cutting role, and the cutting part arranged spirally facilitates the drill to cut fiber reinforced composite materials such as CFRP materials quickly, so that manual hole making is realized.

The invention has the following beneficial effects: through the cutting action of drill point and cutting portion, carry out drilling process to the lamination material, because the first sword of colluding returns with the second and colludes the sword along the axial interval setting of drill point and be crisscross distribution from top to bottom in the circumference of drill point, through the cutting action of colluding the sword with the second back, can cut fibre reinforced composite such as CFRP material, because the first sword of colluding returns with the second and colludes the sword and follow the axial interval setting of drill point and be crisscross distribution from top to bottom in the circumference of drill point can cut in different positions respectively, be different from among the prior art with colluding the sword setting back on a plane, and then can realize getting rid of in grades of burr, also can be better reduce the wearing and tearing effect of burr to the drill bit, improve the cutting effect. Further, the fiber reinforced composite drill bit improves the processing quality of composite materials, ensures the cutting capability of a drill tip and the stability of the processing process, eliminates the phenomenon of drill sticking in the drilling process and the phenomenon of forward punching in the drilling process, and improves the hole forming quality of metal materials in laminated materials.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic perspective view of a drill bit made of a fiber reinforced composite material according to the present disclosure;

FIG. 2 is a top view of a fiber reinforced composite drill bit according to the present disclosure;

FIG. 3 is a schematic view of the parameters of a back-hooking blade of a drill bit made of a fiber reinforced composite material according to the present disclosure;

fig. 4 is a schematic illustration of the stepped removal of a fiber reinforced composite drill bit according to the present disclosure.

Reference numerals: 1. a handle; 2. a cutting portion; 21. a secondary cutting edge; 3. drilling a tip; 31. a first back hooking blade; 311. a first counter blade; 312. a first scraping edge; 32. a second back hooking blade; 321. a second counter blade; 322. a second scraping edge; 33. a main cutting edge.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The embodiment of the invention discloses a fiber reinforced composite drill bit, which comprises the following components in parts by weight as shown in figures 1-4: the handle portion 1, the cutting portion 2 and the drill point 3 that set gradually are equipped with in proper order on the drill point 3 and return to collude sword 31 and the second and collude sword 32, and collude sword 31 and the second back and collude sword 32 and set up and be crisscross distribution in the circumference of drill point 3 from top to bottom along the axial interval of drill point 3.

It should be noted that, through the cutting action of the drill point 3 and the cutting part 2, the laminated material is drilled, because the first back hooking blade 31 and the second back hooking blade 32 are arranged along the axial direction of the drill point 3 at intervals and are vertically staggered in the circumferential direction of the drill point 3, and a fiber reinforced composite drill is further provided, through the cutting action of the first back hooking blade and the second back hooking blade, the fiber reinforced composite material such as a CFRP material can be cut, because the first back hooking blade and the second back hooking blade are arranged along the axial direction of the drill point at intervals and are vertically staggered in the circumferential direction of the drill point, the cutting can be respectively carried out at different positions, which is different from the prior art that the back hooking blades are arranged on a plane, and further the stepped removal of burrs can be realized, the abrasion action of the burrs on the drill can be better reduced, and the cutting effect is improved. Meanwhile, the cutting capability of the drill tip and the stability of the machining process are ensured, the drill clamping phenomenon in the drilling process and the forward punching phenomenon in the hole drilling process are eliminated, and the hole forming quality of the metal material in the laminated material is improved.

As shown in fig. 1 and 2, the number of the first hooking edges 31 is two, and the two first hooking edges 31 are symmetrically distributed on the drill tip 3. Because the two first back-hooking edges 31 are symmetrically distributed on the drill point, the stability of radial stress in the cutting process of the drill bit is ensured.

As shown in fig. 1 and 2, the number of the second hooking edges 32 is two, and the two second hooking edges 32 are symmetrically distributed on the drill tip 3. Because the two second back-hooking edges 32 are symmetrically distributed on the drill tip, the stability of radial stress in the cutting process of the drill bit is ensured.

As shown in fig. 1 and 2, the first hooking edge 31 includes a first counter edge 311 and a first scraping edge 312, which are sequentially disposed. The burrs of the fiber reinforced composite material such as the CFRP material are conveniently removed by the cutting action of the first reverse blade 311 and the first scraping blade 312.

As shown in fig. 1 and 2, the second hooking edge 32 includes a second counter edge 321 and a second scraping edge 322 sequentially disposed. Through the cutting action of second opposite sword 321 and second scraping sword 322, conveniently get rid of fibre reinforced composite's such as CFRP material burr.

As shown in fig. 1 and 2, the drill tip 3 is provided with a major cutting edge 33, and the cutting portion 2 is provided with a minor cutting edge 21 which is engaged with the major cutting edge 33. In the specific implementation process, the working section of the auxiliary cutting edge 21 is of an inverted cone structure, the auxiliary cutting edge 21 is utilized to realize the functions of reaming and chip removal, and the hole wall machining quality is improved while the machining aperture precision is ensured. The main cutting edge 33 and the auxiliary cutting edge 21 both have a cutting function, so that fiber reinforced composite materials such as CFRP materials can be conveniently cut, and further manual hole making is realized.

As shown in fig. 1 and 2, the drill tip 3 is provided with chip flutes. The chip removal groove has the chip removal effect, materials cut by the drill bit are quickly discharged, and drilling of fiber reinforced composite materials such as CFRP materials is facilitated.

As shown in fig. 1 and 2, the cutting portion 2 is spirally disposed. Cutting portion 2 plays the cutting action, and the cutting portion 2 of spiral setting makes things convenient for the drill bit to cut fibre reinforced composite such as CFRP material fast, and then realizes manual system hole.

In the specific implementation, as shown in fig. 3, the hooking edge is composed of a reverse edge and a scraping edge, wherein the reverse edge includes a reverse edge angle α_h1Angle of scraping edge alpha_h2The overall dimension l of the hook blade_h1Length of the counter blade l_h2. The structural parameters of each level of the back-hooking blade are shown in fig. 3, and the size of the first back-hooking blade 31 can be reduced in an equal proportion according to the size of the second back-hooking blade 32, so as to realize the burr removal function with different scales.

As shown in fig. 4, for fiber reinforced composite materials such as CFRP materials, the two-stage back-hooking blade design can achieve the graded removal of burrs. For laminated materials such as CFRP laminated CFRP materials and CFRP laminated aluminum alloys, the stress of the drill bit is changed due to the change of the length of a cutting edge participating in cutting when the back hooking edge passes through the junction of the materials in the drilling process because the physical properties such as hardness, elastic modulus and the like of the materials have certain differences. The design of original single-stage back-hooking blade easily causes the condition of a drill in the drilling process, the drilling end is easy to punch downwards, the quality defects such as flanging of an aluminum alloy outlet and internal scratching of a hole wall are caused, the symmetrical staggered design improves the processing stability of the junction transition section of the laminated material while the burr removing effect of the back-hooking blade is guaranteed, and the operation experience of manual drilling is improved.

The working principle is as follows: through the cutting action of drill point 3 and cutting part 2, carry out drilling processing to the lamination material, because first time collude sword 31 and second time collude sword 32 and set up and be crisscross distribution from top to bottom in the circumference of drill point 3 along the axial interval of drill point 3, and then provide a fibre reinforced composite drill bit, can realize getting rid of in grades of burr, guarantee the cutting ability of drill point and the stability of course of working simultaneously, the dashing phenomenon when having eliminated the jamming of drilling among the drilling process and having bored the hole, metal material's pore-forming quality has been promoted in the lamination material.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.