CN203197326U - Half-moon drill bit for deep hole - Google Patents
Half-moon drill bit for deep hole Download PDFInfo
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- CN203197326U CN203197326U CN 201320147793 CN201320147793U CN203197326U CN 203197326 U CN203197326 U CN 203197326U CN 201320147793 CN201320147793 CN 201320147793 CN 201320147793 U CN201320147793 U CN 201320147793U CN 203197326 U CN203197326 U CN 203197326U
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- cutting
- deep hole
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Abstract
The utility model relates to a half-moon drill bit for a deep hole. According to the half-moon drill bit for the deep hole, a head portion and a handle portion of the drill bit are coaxial cylinders which take an identical central axis as the center, the front end of the head portion is a half cylinder, a cooling hole is formed in the half cylinder, and the missing half cylinder forms a chip discharge groove which is used for containing cutting chips. The head portion is provided with two sections of cutting edges, wherein the included angle between the first cutting edge and the axis is 60 degrees, the second cutting edge is located in the position close to the axis, and the included angle between the second cutting edge and the axis is -70 degrees. Two edges are arranged on the circumference of the head portion, wherein the first edge is arranged beside the first cutting edge and the included angle between the second edge and the first edge is 120 degrees. The half-moon drill bit for the deep hole has the advantages that a cutter is concise in structure and easy to produce, and quality control is easy; the other half cylinder which is ground is used as the chip discharge space used for discharging the cutting chips; double-angle design is applied to the cutting edges, radial cutting force can be balanced by different angles of the cutting edges, abrasion of a cutter body is reduced, and the service life of the cutter is prolonged. The half-moon drill bit for the deep hole further has the advantages of being applicable to deep-hole machining of fragile materials, and capable of achieving machining of plastic materials through the arrangement of a chip breaker groove.
Description
Technical field
The utility model relates to the efficient high-speed precision cutting tool, relates in particular to a kind of first quarter moon drill bit of using for deep hole machining, belongs to the light mechanical and electrical integration field.
Background technology
At present, deep hole machining often adopts drill gun, and such as Fig. 1, gun barrel 2 all adopts welding manner to be connected with shank 1, rifle head 3 with gun barrel 2, and working (machining) efficiency is compared the high-speed steel parabolic bit and improved more than the twice, and the processing linear degree is good, surface quality is high.But drill gun adopts Welding Structure, and welding quality is unstable, feed speed is low is the principal element that affects its popularization.
The utility model content
The purpose of this utility model is to overcome the deficiency that prior art exists, and a kind of first quarter moon drill bit of deep hole machining of the low cost of charp tool is provided, and solves integrity problem in the fragile material deep hole machining.
The purpose of this utility model is achieved through the following technical solutions:
Deep hole first quarter moon drill bit, comprise shank and head, head and shank are the coaxial clyinders centered by same central axis, and characteristics are: the front end of described head is the hemicycle column, be provided with Cooling Holes in the hemicycle column, the space that the hemicycle column of disappearance is formed for holding smear metal is chip area; Described head is provided with two sections cutting edges, and the first cutting edge and axis are 60 ° of angles, and the second cutting edge is in the position near axis, is-70 ° of angles with axis; Described head is provided with two seamed edges at circumference, and the first seamed edge is arranged at by the first cutting edge, and the second seamed edge and the first seamed edge are 120 ° of angles.
Further, above-mentioned deep hole first quarter moon drill bit, the effective length ratio of described the first cutting edge and the second cutting edge is 1.05 ~ 1.15:1.
Further, above-mentioned deep hole first quarter moon drill bit, described the first cutting edge and the size of the second cutting edge on diametric(al) are 1/4 of diameter.
Again further, above-mentioned deep hole first quarter moon drill bit, the position that is parallel to the first cutting edge at head is provided with chip-breaker.
The substantive distinguishing features of technical solutions of the utility model and progressive being mainly reflected in:
1. the utility model cutter structure is succinct, is easy to produce and quality control, and cutter hub adopts semicolumn, and second half cylinder that is ground off is as the chip removal space that is used for discharging smear metal; The semicolumn that forms cutter hub is provided with straight hole, is beneficial to internal cooling and forces chip removal;
2. cutting edge adopts two angle design, comes the balance radial cutting force by the angle of different cutting edges, reaches to reduce the effect that the cutter hub wearing and tearing prolong cutter life; At circumference two seamed edges are set, in order to playing guide effect when the drilling, and guarantee bore diameter;
3. than the deep hole machining that is more suitable for fragile material, also can provide additional deformation to plasticity cutting by chip-breaker is set, make smear metal can stablize chip breaking, to guarantee the smooth discharge of smear metal, to realize the processing of plastic material;
4. cutter hub is semicolumn, and the large and cutter hub good toughness of chip space is particularly suitable for such as workpiece rotating and the static processing occasion of cutter.
Description of drawings
Below in conjunction with accompanying drawing technical solutions of the utility model are described further:
Fig. 1: the structural representation of background technology drill gun;
Fig. 2: structural representation of the present utility model;
The cross section structure schematic diagram of Fig. 3: Fig. 2;
Fig. 4: the structural representation of two sections cutting edges;
The B-B cross-sectional schematic of Fig. 5: Fig. 4
The specific embodiment
Such as Fig. 2, shown in Figure 3, deep hole first quarter moon drill bit, comprise shank 1 and head 4, head 4 and shank 1 are the coaxial clyinders centered by same central axis, shank 1 and the head 4 whole employing trades mark are the ISO-K40 Hardmetal materials, shank 1 is one section higher cylinder of cylindricity precision, comes the clamping shank with transmission lathe power by chuck, thereby so that the cutter rotation possesses cutting power; The front end of head 4 is the hemicycle column, is provided with Cooling Holes 10 in the hemicycle column, cooling fluid can be delivered directly to cutting edge, and cutting edge is carried out effective cooling, if the cooling pressure of lathe during greater than 0.7Mpa, can also play the effect of forcing chip removal; The space that the hemicycle column of disappearance is formed for holding smear metal is chip area 9; Head is provided with two seamed edges at circumference, and in order to play guide effect and to guarantee bore diameter when the drilling, it is other that the first seamed edge 7 is arranged at the first cutting edge 5, and the second seamed edge 8 and the first seamed edge 7 are 120 ° of angles.As shown in Figure 4, head is provided with two sections cutting edges, the first cutting edge 5 is 60 ° of angles with axis, plays main shear action, and the second cutting edge 6 is in the position near axis, cutting speed is lower, bear main axial force, be-70 ° of angles with axis, and can carry out balance to the cutter radial load by the variation of angle, reach and slow down the effect that the cutter hub wearing and tearing prolong cutter life, the effective length ratio of the first cutting edge 5 and the second cutting edge 6 is 1.05 ~ 1.15:1; As shown in Figure 5, the position that head is parallel to the first cutting edge arranges chip-breaker 11, and 15 ° of anterior angles of the general employing of the geometric angle of chip-breaker also cooperate the relief angle with 20 °, and the chip-breaker root adopts arc transition, concentrates to avoid stress.
At present the carbide alloy bar trade mark is various, needs the trade mark of selected the most suitable gun drilling.Selection principle: 1) bending strength 3200N/mm
2The trade mark; 2) grain size, grain size have directly determined the toughness of carbide alloy, and be particularly important in deep hole machining, and the bar grain size should be not more than 0.4-0.5 μ m.Deep hole first quarter moon drill bit adopts the whole hard alloy material to make, and can select the different trades mark according to the working depth difference, and selection principle is that deep hole machining adopts ISO-K40, and this toughness of material is good, and bending strength is high, relatively is fit to the comparatively abominable occasion of deep hole machining.Because deep hole first quarter moon drill bit adopts the whole hard alloy material, does not have the sealing-off phenomenon when the coating temperature of 400 ~ 500 ℃ of temperature, can adopt the CVD coating process, to improve cutter life.
The utility model has reduced the drill bit difficulty of processing, and is less demanding to machine tool.Plain external grinding machine can be finished periphery processing, but should be noted the control of grinding depth and feed speed in grinding process, oval and out-of-alignment situation must not occur; Fluting can be finished at the hand-operated tools grinding machine, needs this moment to adopt V-block to support, with near the surface roughness assurance flatness and the cutting edge; Put the first edge on a knife or a pair of scissors and can finish at numerical control tool grinder, also can finish at the hand-operated tools grinding machine, this moment, fits best optics auxiliary equipment was to guarantee the accuracy of manufacture at Double Tops angle.
Deep hole first quarter moon drill bit is applicable to preferably lathe of the rigidity such as machining center, machined material HT250 casting pig, and hardness HB230-275, concrete cutting parameter and contrast see Table 1.
Table 1
In sum, the utility model deep hole first quarter moon drill bit is fit to gun drilling, because manufacturing process is simple, cost is low, can substitute drill gun in the certain applications occasion, and have higher reliability, is fit to very much the safe processing request of workpiece.In addition, because cutter hub is semicolumn, the large and cutter hub good toughness of chip space also is particularly suitable for such as workpiece rotating and the static processing occasion of cutter.
What need to understand is: the above only is preferred embodiment of the present utility model; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (4)
1. deep hole first quarter moon drill bit, comprise shank and head, head and shank are the coaxial clyinders centered by same central axis, it is characterized in that: the front end of described head is the hemicycle column, be provided with Cooling Holes in the hemicycle column, the space that the hemicycle column of disappearance is formed for holding smear metal is chip area; Described head is provided with two sections cutting edges, and the first cutting edge and axis are 60 ° of angles, and the second cutting edge is in the position near axis, is-70 ° of angles with axis; Described head is provided with two seamed edges at circumference, and the first seamed edge is arranged at by the first cutting edge, and the second seamed edge and the first seamed edge are 120 ° of angles.
2. deep hole first quarter moon drill bit according to claim 1, it is characterized in that: the effective length ratio of described the first cutting edge and the second cutting edge is 1.05 ~ 1.15:1.
3. deep hole first quarter moon drill bit according to claim 1, it is characterized in that: the position that head is parallel to the first cutting edge is provided with chip-breaker.
4. deep hole first quarter moon drill bit according to claim 1, it is characterized in that: described the first cutting edge and the size of the second cutting edge on diametric(al) are 1/4 of diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320147793 CN203197326U (en) | 2013-03-28 | 2013-03-28 | Half-moon drill bit for deep hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320147793 CN203197326U (en) | 2013-03-28 | 2013-03-28 | Half-moon drill bit for deep hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203197326U true CN203197326U (en) | 2013-09-18 |
Family
ID=49141466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320147793 Withdrawn - After Issue CN203197326U (en) | 2013-03-28 | 2013-03-28 | Half-moon drill bit for deep hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203197326U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103143750A (en) * | 2013-03-28 | 2013-06-12 | 苏州阿诺精密切削技术股份有限公司 | Deep hole half-moon drill bit |
-
2013
- 2013-03-28 CN CN 201320147793 patent/CN203197326U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103143750A (en) * | 2013-03-28 | 2013-06-12 | 苏州阿诺精密切削技术股份有限公司 | Deep hole half-moon drill bit |
| CN103143750B (en) * | 2013-03-28 | 2016-05-18 | 苏州阿诺精密切削技术股份有限公司 | Deep hole first quarter moon drill bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130918 Effective date of abandoning: 20160518 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |