CN202571413U - Machine bit for machining kevlar materials - Google Patents
Machine bit for machining kevlar materials Download PDFInfo
- Publication number
- CN202571413U CN202571413U CN 201220187026 CN201220187026U CN202571413U CN 202571413 U CN202571413 U CN 202571413U CN 201220187026 CN201220187026 CN 201220187026 CN 201220187026 U CN201220187026 U CN 201220187026U CN 202571413 U CN202571413 U CN 202571413U
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- angle
- round bar
- cutting edge
- bar shape
- shape structure
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Abstract
The utility model discloses a machine bit for machining kevlar materials. The machine bit comprises a round bar-shaped structure, wherein one end of the round bar-shaped structure is provided with a blade part; the blade part is provided with two spiral cutting edges and a scrap removal groove; the two spiral cutting edges are jointed on the central axis of the round bar-shaped structure; a V-shaped notch which is dented towards the inner section of one end face of the round bar-shaped structure is formed at the joint; the angle of the V-shaped notch is an obtuse angle; and the angle of a joint of the bottom edge of each spiral cutting edge and a circumferential edge is an acute angle. According to the structure, the drill point is designed into a manner that the obtuse angle is combined with the acute angle, so that the machining defects of material galling, material swelling at outlets and inlets, rough hole surfaces, size shrinkage and the like are overcome when the conventional ordinary bit drills kevlar material laminated boards, and the machining quality, the machining precision and the performance of the machined parts are ensured, when the kevlar material laminated boards are drilled.
Description
Technical field
The utility model relates to a kind of drill bit, particularly relates to the machine bit that a kind of processing Kev draws (Kevlar) material.
Background technology
The English original name Kevlar that Kev draws, also translations Kevlar.Be the brand name of a kind of aramid fiber material product of Dupont (Dupont) company development, material is former to be named as " PPTA ".Kev draws that material has that density is low, intensity is high, good toughness, high temperature resistant, be easy to process and the characteristics of moulding, Kev draws material to be made into laminate usually.Holing etc. at the laminate that draws material to process to Kev adds man-hour, need use drill bit, and existing common drill bit generally includes a round bar shape structure; One end of this round bar shape structure is made as blade; The other end is made as shank, and shank is used for fixing, and blade is used for boring; End at blade is provided with two spirality cutting edges by the termination in end, form the chip removal groove between the spirality cutting edge; Blade is made up of cutting edge and the core body that supports cutting edge; Cutting edge is provided with rake face and one or more back knife faces, and the junction between the rake face of cutting edge and the major first flank of cutting edge constitutes the cutting edge of cutting edge; The cutting edge (or cutting edge) that is in the end face of blade end is a shear blade, and the cutting edge (or cutting edge) that is in the perisporium place of round bar shape structure is the circumference sword; At the central axis place of round bar shape structure, the shear blade of two spirality cutting edges joins, and forms the apex point structure of protrusion outside end face in this joint; Existing common drill bit is exactly to utilize the apex point structure of this protrusion to realize boring.Because the bond strength of Kafra fiber material layer pressing plate is low; The adhesive strength of fiber and matrix is far below the tensile strength of fiber; Add man-hour when adopting common drill bit to draw the material layer pressing plate to hole, be easy to generate manufacturing deficiencies such as material plucking, gateway material protuberance, hole surface are coarse, dimensional contraction, cause the hole material around to be destroyed Kev; Influenced the bonding strength of composite, hidden danger easily causes the accident.
The utility model content
The purpose of the utility model is to overcome the deficiency of prior art; A kind of machine bit that Kev draws material of processing is provided; Through existing common drill bit is improved; Thereby manufacturing deficiencies such as being easy to generate material plucking, gateway material protuberance, hole surface are coarse, dimensional contraction when existing common drill bit draws the boring of material layer pressing plate to Kev have been overcome, the performance of crudy, machining accuracy and the processing parts in hole when having guaranteed that Kev drawn the boring of material layer pressing plate.
The utility model solves the technical scheme that its technical problem adopted: a kind ofly process the machine bit that Kev draws material, comprise a round bar shape structure, an end of this round bar shape structure is made as blade, and the other end is made as shank; End at blade is provided with two spirality cutting edges by the termination in end, form the chip removal groove between the spirality cutting edge; Blade is made up of cutting edge and the core body that supports cutting edge; The cutting edge that is in round bar shape structure one end end face is a shear blade, and the cutting edge that is in the perisporium place of round bar shape structure is the circumference sword; At the central axis place of round bar shape structure, two spirality cutting edges join mutually, be provided with the V-arrangement recess that section is absorbed in round bar shape structure one end end face in this phase junction, and the angle of this V-arrangement recess are the obtuse angle; Angle in the junction of the shear blade of each spirality cutting edge and circumference sword is made as acute angle.
The angle at said obtuse angle is 95 °～145 °.
The angle of said acute angle is 3 °～20 °.
The shear blade of said each spirality cutting edge is made as the recessed arcuate structure of section in round bar shape structure one end end face.
Described chip removal groove also is provided with and holds the bits deep trouth.
The angle of the helical angle of said spirality cutting edge is 25 °～40 °.
The utility model a kind of processes the machine bit that Kev draws material, is when apex point designs, to adopt acute angle to combine the design principle at obtuse angle, increases again at the normal chip area of drill bit place and holds the bits deep trouth.The acute angle design has guaranteed the sharpness of apex point, and the smear metal shunting is convenient in the obtuse angle design of bit central part, reduces smear metal winding and clogging, guarantees the smooth discharge of Kafra fiber smear metal.Hold the bits deep trouth in the increase of the normal chip area place of drill bit, cutter has enough chip spaces in the time of can guaranteeing to hole, and reduces smear metal to the fibrolaminar outward thrust in place that portals, and guarantees the crudy of portalling and locating.
The beneficial effect of the utility model is; Owing to adopted the apex point with original bit central protrusion to change the V-arrangement recess that section is absorbed in round bar shape structure one end end face into, and the angle of this V-arrangement recess is the obtuse angle, and changes the angle of the junction of the shear blade of each spirality cutting edge and circumference sword into acute angle by the obtuse angle; Through combining of peripheral acute angle and obtuse angle, center; Both guarantee the sharpness of apex point, be convenient to the smear metal shunting again, reduced smear metal winding and clogging; Hold the bits deep trouth owing to also increase, thereby cutter there are enough chip spaces when guaranteeing boring, reduces smear metal to the fibrolaminar outward thrust in place that portals, the crudy at the place that can guarantee to portal at the normal chip area place of drill bit.The processing Kev of this structure draws the machine bit of material effectively to overcome to be easy to generate when existing common drill bit draws the boring of material layer pressing plate to Kev manufacturing deficiencies such as material plucking, gateway material protuberance, hole surface are coarse, dimensional contraction, the performance of crudy, machining accuracy and the processing parts in hole when guaranteeing that Kev drawn the boring of material layer pressing plate.
Below in conjunction with accompanying drawing and embodiment the utility model is done further explain; But a kind of Kev of processing of the utility model draws the machine bit of material to be not limited to embodiment.
Description of drawings
Fig. 1 is the front view of the utility model;
Fig. 2 is the local enlarged diagram of the utility model;
Fig. 3 is the cutaway view along A-A line among Fig. 1;
Fig. 4 is the partial schematic diagram of the right direction of Fig. 1.
The specific embodiment
Embodiment, to shown in Figure 4, the utility model a kind of processes the machine bit that Kev draws material, comprises a round bar shape structure 10 referring to Fig. 1, and an end of this round bar shape structure 10 is made as blade 11, and the other end is made as shank 12; End at blade 11 is provided with formation chip removal groove 22 between 21, two spirality cutting edges 21 of two spirality cutting edges by the termination in end, owing to be provided with two spirality cutting edges 21 at the perisporium of round bar shape structure 10, therefore, chip removal groove 22 also is two; Blade 11 is made up of cutting edge 21 and the core body 20 that supports cutting edge; The cutting edge that is in round bar shape structure one end end face is a shear blade 211, and the cutting edge that is in the perisporium place of round bar shape structure is a circumference sword 212; At the central axis place of round bar shape structure, two spirality cutting edges join mutually, be provided with the V-arrangement recess 23 that section is absorbed in round bar shape structure one end end face in this phase junction, and the angle B of this V-arrangement recess 23 are the obtuse angle; Angle C in the junction 24 of the shear blade of each spirality cutting edge and circumference sword is made as acute angle.
The angle B at said obtuse angle is 95 °～145 °, and is as shown in Figure 2.
The angle C of said acute angle is 3 °～20 °, and is as shown in Figure 2, and the shear blade that this angle C is meant the spirality cutting edge is near the angle between a section of the circumference sword and the round bar shape structure one end end face.
The shear blade 211 of said each spirality cutting edge is made as the recessed arcuate structure of section in round bar shape structure one end end face.
Described chip removal groove 22 also is provided with and holds bits deep trouth 221.
The angle D of the helical angle of said spirality cutting edge is 25 °～40 °.
The utility model a kind of processes the machine bit that Kev draws material, is when apex point designs, to adopt acute angle to combine the design principle at obtuse angle, increases again at the normal chip area of drill bit place and holds the bits deep trouth.The acute angle design has guaranteed the sharpness of apex point, and the smear metal shunting is convenient in the obtuse angle design of bit central part, reduces smear metal winding and clogging, guarantees the smooth discharge of Kafra fiber smear metal.Hold the bits deep trouth in the increase of the normal chip area place of drill bit, cutter has enough chip spaces in the time of can guaranteeing to hole, and reduces smear metal to the fibrolaminar outward thrust in place that portals, and guarantees the crudy of portalling and locating.
The foregoing description only is used for further specifying the utility model a kind ofly processes the machine bit that Kev draws material; But the utility model is not limited to embodiment; Every technical spirit according to the utility model all falls in the protection domain of the utility model technical scheme any simple modification, equivalent variations and modification that above embodiment did.
Claims (6)
1. process the machine bit that Kev draws material for one kind, comprise a round bar shape structure, an end of this round bar shape structure is made as blade, and the other end is made as shank; End at blade is provided with two spirality cutting edges by the termination in end, form the chip removal groove between the spirality cutting edge; Blade is made up of cutting edge and the core body that supports cutting edge; The cutting edge that is in round bar shape structure one end end face is a shear blade, and the cutting edge that is in the perisporium place of round bar shape structure is the circumference sword; It is characterized in that: at the central axis place of round bar shape structure, two spirality cutting edges join mutually, be provided with the V-arrangement recess that section is absorbed in round bar shape structure one end end face in this phase junction, and the angle of this V-arrangement recess are the obtuse angle; Angle in the junction of the shear blade of each spirality cutting edge and circumference sword is made as acute angle.
2. processing Kev according to claim 1 draws the machine bit of material, it is characterized in that: the angle at said obtuse angle is 95 °～145 °.
3. processing Kev according to claim 2 draws the machine bit of material, it is characterized in that: the angle of said acute angle is 3 °～20 °.
4. draw the machine bit of material according to claim 1 or 2 or 3 described processing Kevs, it is characterized in that: the shear blade of said each spirality cutting edge is made as the recessed arcuate structure of section in round bar shape structure one end end face.
5. draw the machine bit of material according to claim 1 or 2 or 3 described processing Kevs, it is characterized in that: described chip removal groove also is provided with and holds the bits deep trouth.
6. draw the machine bit of material according to claim 1 or 2 or 3 described processing Kevs, it is characterized in that: the angle of the helical angle of said spirality cutting edge is 25 °～40 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220187026 CN202571413U (en) | 2012-04-27 | 2012-04-27 | Machine bit for machining kevlar materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220187026 CN202571413U (en) | 2012-04-27 | 2012-04-27 | Machine bit for machining kevlar materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202571413U true CN202571413U (en) | 2012-12-05 |
Family
ID=47240865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220187026 Expired - Lifetime CN202571413U (en) | 2012-04-27 | 2012-04-27 | Machine bit for machining kevlar materials |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202571413U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020113798A1 (en) * | 2018-12-05 | 2020-06-11 | 江苏锋菱超硬工具有限公司 | Long-service-life ultrathin sintering brazing hole drill for drilling of military armored kevlar layer and production process therefor |
-
2012
- 2012-04-27 CN CN 201220187026 patent/CN202571413U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020113798A1 (en) * | 2018-12-05 | 2020-06-11 | 江苏锋菱超硬工具有限公司 | Long-service-life ultrathin sintering brazing hole drill for drilling of military armored kevlar layer and production process therefor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121205 |
|
| CX01 | Expiry of patent term |