KR101633228B1 - Manufacturing method of drill tool for processing composite material - Google Patents
Manufacturing method of drill tool for processing composite material Download PDFInfo
- Publication number
- KR101633228B1 KR101633228B1 KR1020150113624A KR20150113624A KR101633228B1 KR 101633228 B1 KR101633228 B1 KR 101633228B1 KR 1020150113624 A KR1020150113624 A KR 1020150113624A KR 20150113624 A KR20150113624 A KR 20150113624A KR 101633228 B1 KR101633228 B1 KR 101633228B1
- Authority
- KR
- South Korea
- Prior art keywords
- cutter
- composite material
- adapter
- cfrp
- drill
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools
- B23P15/32—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools twist-drills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/02—Twist drills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/08—Side or plan views of cutting edges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/24—Overall form of drilling tools
-
- B23K2203/18—
Abstract
The present invention relates to a cutter for cutting a workpiece made of a composite material having different kinds of materials and forming a hole in the workpiece, Wherein the cutter is made of a cemented carbide, the adapter is made of a heat-treated material, and the cutter and the adapter are joined by blading. The method of manufacturing a drill tool for processing a composite material according to claim 1, .
As described above, the method of manufacturing a drill tool for processing a composite material according to the present invention has a remarkable effect such that the tip is made of a cemented carbide and the adapter is bonded by blading so as to be made of a heat treatment material, .
Description
The present invention relates to a method of manufacturing a drill tool for forming a hole in a work material made of a composite material in which different kinds of materials are laminated, and more particularly, to a method of manufacturing a composite tool The present invention relates to a method for manufacturing a drill tool for processing a composite material, which comprises a cemented carbide cutter and a heat-treated adapter suited for machining.
Recently, aircraft structures that have been made of Al materials have been widely changed to composite (CFRP) sheaths and metal (Al, Ti) stiffeners for lighter weight. The characteristics of CFRP materials, In order to reduce the resistance, there is a tendency to be changed to a combination of a plate head bolt and a nut.
Fig. 1 is an outline view showing the condition of a machining hole of a composite material, and Fig. 2 is a photograph showing a phenomenon occurring at the time of machining a single material machining drill.
Most assembly of aircraft structure is more than 60% of drilling process.
It is difficult to realize the added value due to the increase of the process time and the increase of the tool cost.
When the hole tolerance is also set to Tight (Max .03mm) and CFRP material is composed of metal material and multi stacking as difficult material, it is difficult to drill to the desired dimension at once, so that at least 2 ~ 5 times of hole size are achieved.
It is difficult to realize the added value due to the increase of the process time and the increase of the tool cost.
Cutter Geomety developed for conventional single material processing is compatible with aircraft material composed of multi stack and unstable dimensional stability and it is difficult to process in full size at once. It is difficult to process CFRP part, Ti part deterioration, Al Part Melt phenomenon, There is a problem that a cutter is damaged or a part is deformed due to a severe processing resistance.
In order to solve such a problem, prior art related to a drill for processing a composite material is a drill for a composite material which is made by cutting a material to be processed including at least a part of a fiber reinforced composite material in the publication No. 2012-0089685, A tapered portion formed in a tapered shape by a difference in diameter between a tip end portion formed and a rear end side of the tip end portion and having a distal end outer diameter and a rear end outer diameter larger than the distal end outer diameter; And a straight portion formed to have a diameter equal to or larger than the outer diameter of the rear end of the taper portion so as to be able to form a finishing diameter larger than the outer diameter of the rear end portion of the taper portion, wherein an outer peripheral cutting edge twisted in a helical shape is formed on the outer circumference of the taper portion, And the diameter of the perforations is set to be larger. Drills for composite materials are disclosed.
Another conventional drill body includes a drill body and a shank formed at one end of the drill body. The drill body includes a rib formed in a spiral shape along the axial direction of the drill body, And a drill head formed at the other end of the drill main body in which the shank is not formed, wherein the drill head is formed in a multi-stage so that a first cutting edge and a second cutting edge, And the second cutting edge is formed in a direction toward the drill head, the point angle of the first cutting edge is 90to 130 degrees, and the angle of incision of the second cutting edge is 5 to 15 degrees And the twist angle formed by the chip discharge groove with the rotation axis of the drill main body is 20 to 40 degrees.
However, the drill tool for processing a composite material used in the prior art is mainly made of a single material having the same portion to be punched in the material and the portion to be bonded to the air tool, and the portion to be punched and the portion to be bonded to the air tool However, it is disadvantageous in that drills are manufactured in conformity with the hole drilling portion made of mostly expensive materials, and thus the manufacturing cost is very high. In addition, there is a disadvantage in that the drill is very vulnerable to the thrust resistance due to the straight line.
The method for manufacturing a drill tool for machining a composite material according to the present invention has been devised to solve the above-mentioned problems, and a method of manufacturing a drill tool for machining a composite material has been proposed in order to solve the above- The present invention provides a method of manufacturing a drill tool for processing a composite material.
A drill tool for forming a hole in a work material made of a composite material according to the present invention, the cutter contacting the composite material to form a hole, and an adapter coupled to an air tool positioned at a rear end of the cutter to drive the cutter. In the manufacturing method, the cutter and the adapter are made of dissimilar metals, and are bonded to each other by blading.
As described above, the method of manufacturing a drill tool for processing a composite material according to the present invention has a remarkable effect such that the tip is made of a cemented carbide and the adapter is bonded by blading so as to be made of a heat treatment material, .
BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic diagram showing conditions of a processing hole of a composite material. Fig.
Fig. 2 is a photograph showing a phenomenon occurring in machining a single material processing drill. Fig.
3 is an outline view showing a cutter shape of a drill required for each material.
4 is an outline photograph of a drill tool for processing a composite material according to the present invention.
5 is a photograph showing an oil hole of a conventional drill tool.
6 is a photograph showing an oil hole of a drill tool for working a composite material according to the present invention.
7 is a partial enlarged schematic view for explaining a forming portion of an oil hole of a drill tool for working a composite material of the present invention.
8 is a schematic view of a drill tool for processing a composite material according to the present invention, to which a double point angle is applied.
9 is a photograph showing the tip shape of a conventional drill tool.
10 is a photograph showing a facet of a drill tool for processing a composite material according to the present invention.
11 is an enlarged view showing a chisel edge of a drill tool for processing a composite material according to the present invention.
12 is an enlarged photograph showing a streamlined tip end point of a drill tool for processing a composite material according to the present invention.
The
A protrusion is formed on the
The
Hereinafter, a method of manufacturing a drill tool for processing a composite material according to the present invention will be described in detail with reference to the accompanying drawings.
3 is a schematic view showing a cutter shape of a drill required for each material.
In the case of airplanes, the types of material used for each aircraft part and the method of lamination were different, and standardized cutters could not meet the characteristics of each material.
Particularly, CFRP requires high RPM, high speed FEED and minimum cooling. Among Al, RPM, medium speed FEED and intermediate cooling are required. Ti requires low RPM, low speed FEED and maximum cooling.
The optimal cutter shape required for each material is different.
For CFRP, the angle of cutter tip point is small (90 ~ 120 °)
Al - Cutter The angle of the tip point is intermediate (120 ~ 135 °)
Ti - Cutter Tip angle is large (135 ~ 150 °)
4 is an outline photograph of a drill tool for processing a composite material according to the present invention.
As shown in FIG. 4, the present invention relates to a
The
Particularly, the
In detail, the
However, since the cemented carbide is expensive, the adapter (120) to be coupled with the air tool is characterized in that the
SMC refers to chromium molybdenum steel, and the SMC four series contains 0.38-0.43 wt% carbon.
The heat treatments of four kinds of SMCs were hardened by high frequency heat treatment.
The
Blazing is a method of melting a metal (flux) having a melting point lower than that of the base material without melting the base material and bonding the joints with the suction force by surface tension.
That is, the
On the other hand, before bonding, grease is applied to the
Particularly, in the present invention, a sharp V-shaped protrusion is formed at the rear end of the
Silver-copper-zinc alloy is also included in silver-copper alloy. It is good in fluidity, can make solderless parts without groove, has excellent strength and ductility of soldered area, , But there is a very low characteristic of the freezing point.
The
FIG. 5 is a photograph showing the oil hole of the conventional drill tool, FIG. 6 is a photograph showing the oil hole of the drill tool for working the composite material of the present invention, and FIG. This is a partial enlarged schematic view.
5 to 6, the two
5, the
A facet refers to a cut surface such as a jewel. In the present invention, the cut surface formed on the
On the other hand, in theory, the
FIG. 8 is a photograph showing a tip shape of a conventional drill tool, FIG. 9 is a photograph showing a facet of a drill tool for processing a composite material of the present invention, and FIG. 10 is a schematic view of a double point angle of a drill tool for processing a composite material of the present invention.
The
8, a cutting
That is, the
As shown in FIG. 10, in order to process a metal having high toughness so as to be suitable for a double material structure of a composite material and a metal, a tool angle must be large. In order to prevent peeling of the composite material, Angle was applied.
If Al and carbon fiber reinforced plastic (CFRP) are stacked, the first cutting surface is formed to be 120 to 135 degrees so as to be suitable for cutting the AL layer in the lower layer, and the second cutting surface is formed to be 30 to 90 degrees When the edge of the drill penetrates the CFRP of the upper layer, the bottom surface is not peeled off.
In addition, when Ti and carbon fiber reinforced plastic (CFRP) are laminated, the first cutting surface is formed at 135 to 150 degrees to be suitable for infiltration of Ti in the lower layer, and the second cutting surface is formed at 30 to 90 degrees, When the edge of the CFRP passes through the CFRP of the upper layer, the bottom surface is not peeled off.
11 is an enlarged view showing a chisel edge of a drill tool for working a composite material according to the present invention.
As shown in FIG. 11, the width of the
If the width of the
12 is an enlarged photograph showing the streamlined tip end point of the drill tool for working the composite material of the present invention.
Generally, the tip of the
That is, the shape of the tip of the
As described above, the method of manufacturing a drill tool for processing a composite material according to the present invention has a remarkable effect such that the tip is made of a cemented carbide and the adapter is bonded by blading so as to be made of a heat treatment material, .
100. Drill tool
110.
111b.
114. Cutting
120.
130. Joint surface
Claims (3)
The cutter 110 and the adapter 120 are made of dissimilar metals and joined together by blading,
A protrusion is formed on a joint surface 130 of one of the cutter 110 and the adapter 120 and a groove is formed on another joint surface 130 corresponding to the protrusion,
The cutter 110 is composed of a chisel edge 115 which is a vertex which is positioned at a tip and directly contacts a work material to make a hole and a plurality of facets 111 which are inclined rearward with respect to the chisel edge 115 The facet 111 has a first cutting surface 111a formed as a mildly inclined surface behind the chisel edge 115 and a second cutting surface 111b extending from the rear end of the first cutting surface 111a and formed as a steeply inclined surface ),
When the workpiece is made of Al and carbon fiber reinforced plastic (CFRP), the first cutting surface is formed to be 120 to 135 ° so as to fit the AL layer of the lower layer, and the second cutting surface is formed to be 30 to 90 ° So that when the edge of the drill passes through the CFRP of the upper layer, the bottom surface is not peeled off,
When the workpiece is made of Ti and carbon fiber reinforced plastic (CFRP), the first cutting surface is formed to be 135 to 150 degrees so as to be suitable for infiltrating Ti in the lower layer and the second cutting surface is formed to be 30 to 90 degrees. When the edge of the CFRP passes through the CFRP of the upper layer, the bottom surface is not peeled off,
Wherein a width of the chisel edge (115) is less than 0.03 mm in order to facilitate positioning when the cutter (110) is initially inserted and to minimize the thrust resistance.
Priority Applications (1)
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KR1020150113624A KR101633228B1 (en) | 2015-08-12 | 2015-08-12 | Manufacturing method of drill tool for processing composite material |
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KR1020150113624A KR101633228B1 (en) | 2015-08-12 | 2015-08-12 | Manufacturing method of drill tool for processing composite material |
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KR101633228B1 true KR101633228B1 (en) | 2016-06-23 |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108044189A (en) * | 2017-12-12 | 2018-05-18 | 中航成飞民用飞机有限责任公司 | The Sandwich assemblies method for drilling of carbon fiber-containing composite material |
CN108995055A (en) * | 2018-09-06 | 2018-12-14 | 舟山飞达工具有限公司 | A kind of L slot cement brill |
KR20190102582A (en) | 2018-02-26 | 2019-09-04 | 창원대학교 산학협력단 | hole drilling device for composite materials |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02126710U (en) * | 1989-03-24 | 1990-10-18 | ||
JPH11114712A (en) * | 1997-10-17 | 1999-04-27 | Kanefusa Corp | Rotary drilling tool |
KR20030090976A (en) * | 2002-05-24 | 2003-12-01 | 김웅환 | Process for connecting cemented carbide part to steel special use stainless part and product produced thereby |
JP2009172708A (en) * | 2008-01-23 | 2009-08-06 | Sumitomo Electric Ind Ltd | Drilling tool and drilling method for fiber-reinforced composite material |
-
2015
- 2015-08-12 KR KR1020150113624A patent/KR101633228B1/en active IP Right Grant
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02126710U (en) * | 1989-03-24 | 1990-10-18 | ||
JPH11114712A (en) * | 1997-10-17 | 1999-04-27 | Kanefusa Corp | Rotary drilling tool |
KR20030090976A (en) * | 2002-05-24 | 2003-12-01 | 김웅환 | Process for connecting cemented carbide part to steel special use stainless part and product produced thereby |
JP2009172708A (en) * | 2008-01-23 | 2009-08-06 | Sumitomo Electric Ind Ltd | Drilling tool and drilling method for fiber-reinforced composite material |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108044189A (en) * | 2017-12-12 | 2018-05-18 | 中航成飞民用飞机有限责任公司 | The Sandwich assemblies method for drilling of carbon fiber-containing composite material |
KR20190102582A (en) | 2018-02-26 | 2019-09-04 | 창원대학교 산학협력단 | hole drilling device for composite materials |
CN108995055A (en) * | 2018-09-06 | 2018-12-14 | 舟山飞达工具有限公司 | A kind of L slot cement brill |
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