阅读说明：本技术 一种用于加工碳纤维增强树脂基复合材料和铝合金的叠层构件的手工钻头 (Manual drill bit for processing laminated member of carbon fiber reinforced resin matrix composite and aluminum alloy ) 是由 黄文亮 王振国 吕涛 程谟力 于 2021-10-28 设计创作，主要内容包括：一种用于加工碳纤维增强树脂基复合材料和铝合金的叠层构件的手工钻头,包括：依次连接的柄部与刃部,所述刃部包括依次相邻设置的横刃、第一主切削刃、第二主切削刃、第三主切削刃与副切削刃,所述副切削刃呈螺旋状设置,由于刃部包括依次相邻设置的横刃、第一主切削刃、第二主切削刃、第三主切削刃与副切削刃,刃部起切削作用。(A hand drill for machining a laminated member of a carbon fiber reinforced resin based composite material and an aluminum alloy, comprising: stalk portion and cutting part that connects gradually, the cutting part is including chisel edge, first main cutting edge, second main cutting edge, third main cutting edge and the vice cutting edge that adjacent set gradually, the vice cutting edge is the heliciform setting, because the cutting part is including chisel edge, first main cutting edge, second main cutting edge, third main cutting edge and the vice cutting edge that adjacent set gradually, the cutting part plays the cutting action.)

1. A hand drill for machining a laminated member of a carbon fiber reinforced resin-based composite material and an aluminum alloy, characterized by comprising: stalk portion (1) and cutting part (2) that connect gradually, cutting part (2) are including chisel edge (21), first main cutting edge (22), second main cutting edge (23), third main cutting edge (24) and vice cutting edge (25) that adjacent set up in proper order, vice cutting edge (25) are the heliciform setting, the length of chisel edge (21) is between 1/30 to 1/15 of drill diameter.

2. The hand drill for machining laminated members of carbon fiber reinforced resin based composite materials and aluminum alloys according to claim 1, wherein the apex angle of the first main cutting edge (22) is 110 to 150 °.

3. The hand drill for machining laminated members of carbon fiber reinforced resin based composite materials and aluminum alloys according to claim 1, wherein the apex angle of the second main cutting edge (23) is 50-90 °.

4. The hand drill for machining laminated members of carbon fiber reinforced resin based composite materials and aluminum alloys according to claim 1, wherein the apex angle of the third main cutting edge (24) is 140 to 180 °.

5. The hand drill for manufacturing a laminated member of carbon fiber reinforced resin based composite material and aluminum alloy as claimed in claim 1, wherein the amount of reverse taper of the secondary cutting edge (25) is 0.5/100-1.5/100.

6. The hand drill for machining a laminated member of a carbon fiber reinforced resin based composite material and an aluminum alloy according to any one of claims 1 to 4, wherein a rake angle of the first main cutting edge (22) and a rake angle of the second main cutting edge (23) are both 8 to 15 °.

7. The hand drill for machining laminated members of carbon fiber reinforced resin based composite material and aluminum alloy as claimed in any one of claims 1 to 4, wherein the relief angle of the first main cutting edge (22), the relief angle of the second main cutting edge (23) and the relief angle of the third main cutting edge (24) are each 10-12 °.

8. The hand drill for processing a carbon fiber reinforced resin based composite material and aluminum alloy laminate member as claimed in claim 1, wherein the helix angle of the secondary cutting edge (25) is 20 to 50 °.

9. The hand drill for machining a laminated member of carbon fiber reinforced resin based composite material and aluminum alloy according to claim 1, characterized in that the diameter of the blade portion (2) is d, and the core thickness of the blade portion (2) is d₀The size is 0.25-0.35 d.

10. Hand drill for machining laminated components of carbon fibre reinforced resin based composite material and aluminium alloy according to claim 1 or 5 or 8, characterised in that the width of the secondary cutting edge (25) is between 1/20 and 1/10 of the drill diameter.

Technical Field

The invention relates to the technical field of hole making of laminated components, in particular to a manual drill for processing a laminated component made of carbon fiber reinforced resin matrix composite and aluminum alloy.

Background

Carbon fiber reinforced resin matrix Composite (CFRP) and aluminum alloy (Al) are widely applied to the field of aerospace due to the characteristics of high strength and light weight. CFRP/Al laminated components are used in a large number for parts such as wing rib plates, fuselage barrel sections and the like. Because the size of the parts of the equipment in the aerospace field is huge, the parts cannot be installed and enter a numerical control machine tool, hole machining needs to be carried out on an assembly site, and the hole machining process is limited by space. For some narrow stations, large-scale automatic hole making equipment such as a mechanical arm cannot enter, and manual hole making must be carried out by means of a drill gun held by a worker.

Due to the difference of the material properties of the CFRP and the Al, different processing parameters are required to be used for processing during hole processing, and variable parameter processing can be realized by hole-making equipment such as a numerical control machine tool or a mechanical arm. In the face of the processing of the CFRP/Al laminated component, compared with the drilling equipment such as a numerical control machine tool or a mechanical arm, the manual drilling faces more serious challenges, the processing parameters cannot be automatically adjusted in the manual drilling process, the axial feeding force needs to be controlled by the experience of workers, and the stability of the drilling quality is difficult to ensure. And CFRP and aviation aluminum alloy all belong to typical difficult processing material, CFRP access & exit is very easy to appear burr, layering, defect such as tearing, and the aluminum alloy export is very easy to appear turn-ups, burr. If the CFRP orifice has damage such as burrs, tearing, layering and the like, the performance of the component can be greatly reduced, even the component is scrapped, if the Al orifice has damage such as flanging, burrs and the like, the qualification rate can be influenced, the machining efficiency can be seriously influenced by additionally increasing a deburring process, and the machining cost is increased. When carrying out manual system hole with ordinary fluted drill and current various types of brill, still can appear the drilling hard, system hole inefficiency scheduling problem.

Therefore, it is an urgent technical problem to provide a hand drill for machining a laminated member of a carbon fiber reinforced resin matrix composite and an aluminum alloy so as to facilitate high-quality and high-efficiency hole machining of the laminated member.

Disclosure of Invention

The invention aims to provide a manual drill for processing a laminated member of a carbon fiber reinforced resin matrix composite and an aluminum alloy, so as to conveniently process holes on the laminated member.

To this end, according to a first aspect, embodiments of the present invention disclose a hand drill for machining a laminated member of a carbon fiber reinforced resin-based composite material and an aluminum alloy, comprising: stalk portion and cutting part that connect gradually, the cutting part is including the chisel edge, first main cutting edge, second main cutting edge, third main cutting edge and the vice cutting edge of adjacent setting in proper order, vice cutting edge is the heliciform setting, the length of chisel edge is between 1/30 to 1/15 of drill diameter, is favorable to guaranteeing the centering ability of drill bit to reduce the axial force of drill bit, and then reduce the lamination component deformation and the export processing damage of carbon fiber reinforced resin matrix combined material and aluminum alloy. If the chisel edge length is less than 1/30 the bit diameter will result in low strength, unstable penetration and the tendency for chipping. If the chisel edge length is greater than 1/15 the bit diameter will cause too much drilling axial force, resulting in delamination, tearing damage at the composite port.

The vertex angle of the first main cutting edge is 110-150 degrees, and the vertex angle of the first main cutting edge, which is different from the common value, of 110-150 degrees is adopted, so that the drill bit can easily drill materials, and the drilling process is more labor-saving.

The vertex angle of the second main cutting edge is 50-90 degrees, and the vertex angle of the second main cutting edge which is smaller than the vertex angle of the second main cutting edge of 50-90 degrees is adopted in the invention, so that the axial force can be reduced, the CFRP hole making damage can be inhibited, and the hole making quality can be obviously improved.

The vertex angle of the third main cutting edge is 140-180 degrees, and the adoption of the larger vertex angle of the third main cutting edge can reduce the burrs at the outlet of the aluminum alloy and further improve the hole making quality.

The invention is further provided that the amount of back taper of the secondary cutting edge is 0.5/100 to 1.5/100. The adoption of the larger back taper amount is beneficial to reducing the friction between the secondary cutting edge and the hole wall and reducing the generation of cutting heat and the abrasion of a cutter.

The invention is further arranged in such a way that the rake angle of the first main cutting edge and the rake angle of the second main cutting edge are both 8-15 degrees, and the sharpness of the fiber cutting machine is ensured and the fiber can be effectively cut off by optimally setting the rake angle of the first main cutting edge and the rake angle of the second main cutting edge.

The invention is further arranged in such a way that the relief angles of the first main cutting edge, the second main cutting edge and the third main cutting edge are 10-12 degrees, and the sharpness of the cutting edges is ensured by optimally setting the larger front relief angle, so that the cutting capability of the CFRP fiber can be enhanced.

The helix angle of the auxiliary cutting edge is 20-50 degrees, and the front angle of the third main cutting edge is the helix angle, so that the sharpness is ensured, the fibers can be effectively cut, burrs at an aluminum alloy outlet can be reduced, and the chips can be more smoothly discharged by setting the larger helix angle for optimization.

The invention is further provided that the diameter of the blade is d, and the core thickness of the blade is d₀0.25-0.35 d. According to the invention, through optimizing and setting the special diameter length proportion, the integral strength of the drill bit can be ensured and the chip containing space of the drill bit can be increased.

The invention further provides that the width of the secondary cutting edge is between 1/20 and 1/10 of the drill diameter d. According to the invention, through optimizing and setting a special diameter length proportion, the width of the secondary cutting edge enables the hole wall to have a certain supporting effect on tool setting, and the stability of a drilling process is ensured.

The invention has the following beneficial effects: the edge part comprises a chisel edge, a first main cutting edge, a second main cutting edge, a third main cutting edge and an auxiliary cutting edge which are sequentially and adjacently arranged, the edge part plays a cutting role and is matched with the numerical value optimization and matching of each structure, and the hole making effect is improved by the cooperation of the structure and parameters through the optimization and setting; the structural design of this cutting part has guaranteed the centering ability of drill bit, has reduced the axial force of drill bit, has guaranteed its sharpness simultaneously, can effectively cut off the fibre, also can reduce aluminum alloy export burr simultaneously. Therefore, the manual drill for processing the laminated member of the carbon fiber reinforced resin matrix composite and the aluminum alloy is provided, manual hole making processing is conveniently carried out on the laminated member of the carbon fiber reinforced resin matrix composite and the aluminum alloy, and the efficiency and the hole quality of manual hole making are improved.

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 structural view of a hand drill for machining a carbon fiber reinforced resin-based composite material and an aluminum alloy laminated member according to the present embodiment;

FIG. 2 is a top view of a hand drill for machining a carbon fiber reinforced resin based composite material and aluminum alloy laminate member according to the present embodiment;

FIG. 3 is an enlarged schematic view at I of FIG. 1;

fig. 4 is a schematic view of the cross-sectional structure C-C of fig. 1.

Reference numerals: 1. a handle; 2. a blade part; 21. a chisel edge; 22. a first main cutting edge; 23. a second main cutting edge; 24. a third main cutting edge; 25. and a secondary 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.

First embodiment

The embodiment of the invention discloses a hand drill for processing a laminated member of a carbon fiber reinforced resin matrix composite and an aluminum alloy, which comprises the following components in percentage by weight as shown in figures 1-4: the handle part 1 and the edge part 2 are connected in sequence, the edge part 2 comprises a chisel edge 21, a first main cutting edge 22, a second main cutting edge 23, a third main cutting edge 24 and an auxiliary cutting edge 25 which are arranged adjacently in sequence, the auxiliary cutting edge 25 is arranged spirally, and the length b of the chisel edge 21_ΨBetween 1/30 and 1/15 of the bit diameter d. In practice, the chisel edge 21 is extended by a length b_ΨAnd grinding to 1/20d, so that the drill bit can ensure good centering capability and reduce axial force, thereby reducing deformation of the laminated member of the carbon fiber reinforced resin matrix composite and the aluminum alloy and processing damage of an outlet.

It should be noted that, because the cutting part 2 includes the chisel edge 21, the first main cutting edge 22, the second main cutting edge 23, the third main cutting edge 24 and the auxiliary cutting edge 25 which are adjacently arranged in sequence, the cutting part 2 has a cutting function, and the structural design of the cutting part ensures the centering capability of the drill, reduces the axial force of the drill, ensures the sharpness of the drill, can effectively cut off fibers, and can also reduce the aluminum alloy outlet burrs. Therefore, the manual drill for machining the carbon fiber reinforced resin matrix composite and the aluminum alloy laminated member is further provided, manual hole machining is conveniently carried out on the carbon fiber reinforced resin matrix composite and the aluminum alloy laminated member, and the efficiency and the hole quality of manual hole machining are improved.

As shown in fig. 1 and 2, the apex angle of the first major cutting edge 22Is 110 to 150 degrees. In the specific implementation, the apex angle of the first major cutting edge 22At 140 deg., the larger apex angle of the first major cutting edge 22 facilitates easy penetration of the drill into the material, making the drilling process more labor-efficient.

As shown in fig. 1 and 2, the apex angle of the second major cutting edge 23 isIs 50 to 90 degrees. In the specific implementation, the vertex angle of the second main cutting edge 23 isThe vertex angle of the second main cutting edge is 50 degrees, so that the axial force can be reduced, the CFRP hole forming damage can be inhibited, and the hole forming quality can be obviously improved.

As shown in fig. 1 and 2, the apex angle of the third major cutting edge 24 isIs 140 to 180 degrees. In the specific implementation, the apex angle of the third major cutting edge 24 isIs 170 degrees, the top angle of the third main cutting edge 24 with larger angle can reduce the outlet burr of the aluminum alloy, and the hole making quality is further improved.

As shown in fig. 1 and 2, the reverse taper amount of the minor cutting edge 25 is 0.5/100 to 1.5/100. In the specific implementation process, the back taper amount of the secondary cutting edge 25 is 1/100, and the larger back taper amount is beneficial to reducing the friction between the secondary cutting edge 25 and the hole wall and reducing the generation of cutting heat and the abrasion of a cutter.

As shown in fig. 1 and 2, the rake angle γ of the first major cutting edge 22₁A rake angle gamma with the second major cutting edge 23₂All are 8-15 degrees. In the specific implementation, the rake angle γ of the first major cutting edge 22₁A rake angle gamma with the second major cutting edge 23₂Are all 10 degrees. Ensuring the sharpness and effectively cutting off the fiber.

As shown in fig. 1 and 2, the relief angle α of the first major cutting edge 22₁The relief angle alpha of the second main cutting edge 23₂Relief angle alpha with the third major cutting edge 24₃All are 10-12 degrees. In the specific implementation, the relief angle α of the first major cutting edge 22₁The relief angle alpha of the second main cutting edge 23₂Relief angle alpha with the third major cutting edge 24₃The cutting blade is 12 degrees, the sharpness of the cutting edge is ensured by the larger front and back angles, and the cutting capability of the CFRP fiber can be enhanced.

As shown in fig. 1 and 2, the helix angle β of the secondary cutting edge 25 is 20 to 50 °. In the specific implementation, the rake angle γ of the third main cutting edge 24₃I.e. the helix angle. The sharpness of the aluminum alloy cutting head is guaranteed, fibers can be effectively cut off, burrs at the outlet of the aluminum alloy can be reduced, and chip removal is smoother through the optimization of the large spiral angle.

As shown in FIGS. 1 and 3, the radial width of the blade 2 is d, and the core thickness of the blade 2 is d₀0.25-0.35 d. In the specific implementation, the radial width d of the first major cutting edge 22₁0.4d, the radial width d of the second main cutting edge 23₂Was 0.67 d. In practice, due to the core thickness d₀The whole strength of the drill bit can be ensured and the chip containing space can be increased by 0.25-0.35 d.

As shown in fig. 1, the secondary cutting edge 25 has a width of between 1/20 and 1/12 of the drill diameter d. In the specific implementation process, the width of the secondary cutting edge 25 of 1/20d enables the hole wall to have a certain supporting effect on tool setting, and the stability of the drilling process is ensured.

The working principle is as follows: because cutting part 2 is including the chisel edge 21, first main cutting edge 22, second main cutting edge 23, third main cutting edge 24 and the vice cutting edge 25 that adjacent set up in proper order, cutting part 2 plays the cutting action, and the structural design of this cutting part has guaranteed the centering ability of drill bit, has reduced the axial force of drill bit, has guaranteed its sharpness simultaneously, can effectively cut off the fibre, also can reduce aluminum alloy export burr simultaneously. Therefore, the manual drill for machining the carbon fiber reinforced resin matrix composite and the aluminum alloy laminated member is further provided, manual hole machining is conveniently carried out on the carbon fiber reinforced resin matrix composite and the aluminum alloy laminated member, and the efficiency and the hole quality of manual hole machining are improved.

Second embodiment

The embodiment of the invention discloses a hand drill for processing a laminated member of a carbon fiber reinforced resin matrix composite and an aluminum alloy, which comprises the following components in percentage by weight as shown in figures 1-4: the handle part 1 and the edge part 2 are connected in sequence, the edge part 2 comprises a chisel edge 21, a first main cutting edge 22, a second main cutting edge 23, a third main cutting edge 24 and an auxiliary cutting edge 25 which are arranged adjacently in sequence, the auxiliary cutting edge 25 is arranged spirally, and the length b of the chisel edge 21_ΨBetween 1/30 and 1/15 of the bit diameter d. In practice, the chisel edge 21 is extended by a length b_ΨAnd grinding to 1/20d, so that the drill bit can ensure good centering capability and reduce axial force, thereby reducing deformation of the laminated member of the carbon fiber reinforced resin matrix composite and the aluminum alloy and processing damage of an outlet.

It should be noted that, because the cutting part 2 includes the chisel edge 21, the first main cutting edge 22, the second main cutting edge 23, the third main cutting edge 24 and the auxiliary cutting edge 25 which are adjacently arranged in sequence, the cutting part 2 has a cutting function, and the structural design of the cutting part ensures the centering capability of the drill, reduces the axial force of the drill, ensures the sharpness of the drill, can effectively cut off fibers, and can also reduce the aluminum alloy outlet burrs. Therefore, the manual drill for machining the carbon fiber reinforced resin matrix composite and the aluminum alloy laminated member is further provided, manual hole machining is conveniently carried out on the carbon fiber reinforced resin matrix composite and the aluminum alloy laminated member, and the efficiency and the hole quality of manual hole machining are improved.

As shown in fig. 1 and 2, the first major cutting edge22 corner angleIs 110 to 150 degrees. In the specific implementation, the apex angle of the first major cutting edge 22The 120 deg., larger top angle of the first main cutting edge 22 helps the drill bit to drill into the material easily, making the drilling process more labor-saving.

As shown in fig. 1 and 2, the apex angle of the second major cutting edge 23 isIs 50 to 90 degrees. In the specific implementation, the vertex angle of the second main cutting edge 23 isThe angle is 80 degrees, the smaller vertex angle of the second main cutting edge can help to reduce the axial force, inhibit the damage of CFRP hole making, and obviously improve the hole making quality.

As shown in fig. 1 and 2, the apex angle of the third major cutting edge 24 isIs 140 to 180 degrees. In the specific implementation, the apex angle of the third major cutting edge 24 isIs 160 degrees, the top angle of the third main cutting edge 24 with larger size can reduce the outlet burrs of the aluminum alloy, and the hole making quality is further improved.

As shown in fig. 1 and 2, the reverse taper amount of the minor cutting edge 25 is 0.5/100 to 1.5/100. In the specific implementation process, the back taper amount of the secondary cutting edge 25 is 1/100, and the larger back taper amount is beneficial to reducing the friction between the secondary cutting edge 25 and the hole wall and reducing the generation of cutting heat and the abrasion of a cutter.

As shown in fig. 1 and 2, the rake angle γ of the first major cutting edge 22₁A rake angle gamma with the second major cutting edge 23₂All are 8-15 degrees. In the implementation, the first main cutRake angle gamma of edge 22₁A rake angle gamma with the second major cutting edge 23₂Are all 14 degrees. Ensuring the sharpness and effectively cutting off the fiber.

As shown in fig. 1 and 2, the relief angle α of the first major cutting edge 22₁The relief angle alpha of the second main cutting edge 23₂Relief angle alpha with the third major cutting edge 24₃All are 10-12 degrees. In the specific implementation, the relief angle α of the first major cutting edge 22₁The relief angle alpha of the second main cutting edge 23₂Relief angle alpha with the third major cutting edge 24₃The cutting blade is 12 degrees, the sharpness of the cutting edge is ensured by the larger front and back angles, and the cutting capability of the CFRP fiber can be enhanced.

As shown in fig. 1 and 2, the helix angle β of the secondary cutting edge 25 is 20 to 50 °. In the specific implementation, the rake angle γ of the third main cutting edge 24₃I.e. the helix angle. The sharpness of the aluminum alloy cutting head is guaranteed, fibers can be effectively cut off, burrs at the outlet of the aluminum alloy can be reduced, and chip removal is smoother through the optimization of the large spiral angle.

As shown in FIGS. 1 and 3, the radial width of the blade 2 is d, and the core thickness of the blade 2 is d₀0.25-0.35 d. In the specific implementation, the radial width d of the first major cutting edge 22₁0.4d, the radial width d of the second main cutting edge 23₂Was 0.67 d. In practice, due to the core thickness d₀The whole strength of the drill bit can be ensured and the chip containing space can be increased by 0.25-0.35 d.

As shown in fig. 1, the secondary cutting edge 25 has a width of between 1/20 and 1/12 of the drill diameter d. In the specific implementation process, the width of the secondary cutting edge 25 of 1/20d enables the hole wall to have a certain supporting effect on tool setting, and the stability of the drilling process is ensured.

The working principle is as follows: because cutting part 2 is including the chisel edge 21, first main cutting edge 22, second main cutting edge 23, third main cutting edge 24 and the vice cutting edge 25 that adjacent set up in proper order, cutting part 2 plays the cutting action, and the structural design of this cutting part has guaranteed the centering ability of drill bit, has reduced the axial force of drill bit, has guaranteed its sharpness simultaneously, can effectively cut off the fibre, also can reduce aluminum alloy export burr simultaneously. Therefore, the manual drill for machining the carbon fiber reinforced resin matrix composite and the aluminum alloy laminated member is further provided, manual hole machining is conveniently carried out on the carbon fiber reinforced resin matrix composite and the aluminum alloy laminated member, and the efficiency and the hole quality of manual hole machining are improved.

The following table is a comparison of the cutting effect of a standard twist drill and various embodiments of the present invention:

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.