CN206344312U - Build work drill bit - Google Patents
Build work drill bit Download PDFInfo
- Publication number
- CN206344312U CN206344312U CN201621370834.2U CN201621370834U CN206344312U CN 206344312 U CN206344312 U CN 206344312U CN 201621370834 U CN201621370834 U CN 201621370834U CN 206344312 U CN206344312 U CN 206344312U
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- CN
- China
- Prior art keywords
- drilling rod
- drill bit
- center cutter
- blade
- work drill
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model provides one kind and builds work drill bit, including drilling rod and blade, and the blade is fixed on the front end of the drilling rod, the drilling rod side is provided with helical flute, the rear end of the drilling rod is formed with the clamping handle matched with impact device, wherein, the helical flute is three helical flutes；The blade includes center cutter and three side knives；The center cutter is in spike, the axis centre position positioned at the drilling rod front end face；Three side knives distinguish 120 degree of angle, are distributed on the outside of the center cutter；Three helical flute is extended respectively between the angle of three side knives so that each side knife broken material of cutting in drilling enters the helical flute.The utility model has the characteristics of centering is good, efficient, chip removal is smooth, the life-span is high.
Description
Technical field
The utility model is related to cutting-tool engineering field, and more particularly to one kind builds work drill bit.
Background technology
It is a kind of common instrument in work of building to build work drill bit, and also referred to as electric hammer drill, impact drill, masonry drill, stone material are bored, and is used
In the drilling of hard brittle material in architectural engineering, such as punched on cement concrete, wall brick, stone material.Build work drill bit general by steel
Weld carbide bit on matter drilling rod to be formed, drilling rod one end is the installing handle matched with impact device, and the other end inlays hard
Alloy cutter head.During drilling, impact device sends the impact strength of the certain frequency of drill bit and dynamics to by installing handle, crushes hard crisp
Material, while driving bit, broken material is sent out by chip removal helicla flute, so as to realize the quick of hard brittle material
Drilling.
Common work drill bit helical flute groove profile of building has double spiral groove and four helicla flutes, and it, which carries, cuts hard alloy
Cut broken material to send out, drill bit is smoothly entered in drilling without being blocked.Good helical flute design is not only
Bit life, which can be extended, can also guide drilling process.Multinomial patent or patent application publication are improved setting for transmission characteristic
Meter, such as it is (main that the patent No. or number of patent application mention the design of four helicla flutes for US7137461B2, WO99/29998 document etc.
Helical flute, auxiliary helical flute)；Number of patent application mentions the method raising for improving channel volume for EP657617 document
Transfer capability.
One quality for building work bit performance depends not only on chip removal performance, life-span height, in addition in boring procedure
Stability and drilling efficiency.Many patent documents are it is also mentioned that improve the top design in cutter tip center, such as Patent No.
US7520703B2, CN200420066043.1 document, it discloses blade center and protrudes nose part design, for improving
Drilling starting when centering performance and drilling process it is steady；For the groove design of cutting tip cutting edge, and blade position
Layout is improved with Labor-saving high-efficiency, also just like Patent No. US6446741B1 document etc..
But, the helical flute of prior art there are no three helicla flutes, and consistent with tip shapes, obtain good association
Same-action.
The content of the invention
The purpose of this utility model is that providing one kind builds work drill bit, to realize that centering is good, chip removal is smooth, the life-span is high
Design requirement.
To achieve these goals, the utility model provides following technical scheme：
One kind builds work drill bit, including drilling rod and blade, and the blade is fixed on the front end of the drilling rod, the drilling rod side
Provided with helical flute, the rear end of the drilling rod is formed with the clamping handle matched with impact device, wherein, the helical flute
For three helical flutes；The blade includes center cutter and three side knives；The center cutter is in spike, positioned at the drilling rod front end
The axis centre position in face；Three side knives distinguish 120 degree of angle, are distributed on the outside of the center cutter；The three spirals row
Bits groove is extended respectively between the angle of three side knives so that each side knife broken material of cutting in drilling enters
The helical flute.
Preferably, built above-mentioned in work drill bit, the blade is embedded in the front end of the drilling rod.
Preferably, built above-mentioned in work drill bit, the front end face of the center cutter includes three inclined-planes shunk to central point,
The back edge on the inclined-plane is downwardly extending between three rectangular surfaces, the adjacent inclined-plane, the adjacent rectangular surfaces
Between be provided with vertical V-shaped groove.
Preferably, the V-shaped groove is corresponding with the chip removal extension slot.
Preferably, the top view of the center cutter is similar to edge, the end of Y-shaped, the inclined-plane and the rectangular surfaces
It is round and smooth shape.
Preferably, built above-mentioned in work drill bit, the upper surface of the side knife is that top sword, the lateral surface tilted down is vertical
Side sword, and the top sword exposes the front end face of the drilling rod, and the side sword exposes the side of the drilling rod, the top sword
Seamlessly transitted between the blade of the center cutter.
Preferably, built above-mentioned in work drill bit, the outside of the side knife rotates the diameter to be formed and is more than the straight of the drilling rod
Footpath.
Preferably, built above-mentioned in work drill bit, the outside of the side knife rotates the diameter to be formed more than the drill pipe diameter
2-3mm。
Preferably, built above-mentioned in work drill bit, the height that the rectangular surfaces of the center cutter expose the drilling rod end face is
2.5-3.5mm。
Analysis understands that chip removal groove profile of the present utility model is three helical flutes, and chip removal volume is big, by center cutter and side knife
The tip shapes of composition are similar to Y-shaped, and every chip area one hard alloy chip knife of correspondence, the broken material of each blade is suitable
Profit enters in correspondence helicla flute, discharges chip glibly in time.Generally speaking, the utility model have centering it is good, efficient, row
The characteristics of bits are smooth, the life-span is high.
Brief description of the drawings
The structural representation of Fig. 1 the utility model embodiments；
The enlarged drawing that Fig. 2 is part K in Fig. 1；
Fig. 3 is the top view of the utility model embodiment；
Fig. 4 is the top view of the center cutter of the utility model embodiment；
Fig. 5 is the stereogram of the center insert of the utility model embodiment；
Fig. 6 is the stereogram of the side knife of the utility model embodiment.
Wherein, the description of reference numerals in figure is as follows：
1- clamping handles, 2- drilling rods, 3- helical flutes, 4- center cutters, 5- sides knife,
30- chip removal extension slots, 40-V shape grooves, 41- inclined-planes, 42- rectangular surfaces,
51- pushes up sword, 52- sides sword
Embodiment
The utility model is described in further details with reference to the accompanying drawings and detailed description.
As shown in Figure 1, Figure 2 and Figure 3, the utility model embodiment is integrally in shaft-like, including drilling rod 2 and blade, wherein knife
Piece includes center cutter 4 and side knife 5 again.Center cutter 4 and side knife 5 are carbide chip.Center cutter 4 and side knife 5 are fixed on brill
The front end of bar 2, the side of drilling rod 2 is provided with helical flute 3, and the rear end of drilling rod 2 is formed with the clamping handle 1 matched with impact device.
Clamping handle 1 can be 5 holes, so as to be connected on 5 hole electric hammers, naturally it is also possible to carry out adaptive change as needed.
The helical flute 3 of the present embodiment is three helical flutes.As shown in Figure 4, Figure 5, it is in spike that center cutter 4 is overall,
Positioned at the axis centre position of the front end face of drilling rod 2.Three side knives 5 distinguish 120 degree of angle, are distributed on the outside of center cutter 4.In order to protect
Demonstrate,prove the stability of blade, center cutter 4, the front end of the embedded drilling rod 2 of a part of side knife 5, while welding is with before fixed to drilling rod 2
End.The blade of the present embodiment is split, the drill bit of the drill bit, such as 20mm diameters in big footpath in being relatively adapted to.It is small for diameter
Drill bit, designs more suitable using overall Y-shaped blade.
Three helical flutes 3 are extended respectively between the angle of three side knives 5, form chip removal extension slot three sections shorter
30 so that the broken material of cutting in drilling of each side knife 5 enters helical flute 3.
Again as shown in Figure 4, Figure 5, the front end face of center cutter 4 includes three inclined-planes 41 shunk to central point, inclined-plane 41
Back edge is downwardly extending three rectangular surfaces 42, and (similar supporting leg is welded, it is ensured that center cutter beneficial to the accurate screens of center cutter
Location accuracy), vertical V-shaped groove 40, V-shaped groove 40 and row are provided between adjacent inclined-plane 41, between adjacent rectangular surfaces 42
Consider the correspondence of extension slot 30 to be worth doing.Generally speaking, the top view of center cutter 4 is similar to Y-shaped, when drilling starts, the top small energy of contact surface
Rapid accurately pound positions into material, it is to avoid abnormal shake displacement.You need to add is that, inclined-plane 41, the edge of rectangular surfaces 42, end
Portion is round and smooth shape, and the intersecting end face on such as inclined-plane 41 is a less plane, to prevent stress concentration, therefore, inclined-plane
41st, on rectangular surfaces 42 and non-critical geometric meaning tapered plane, rectangular surfaces.
It is that top sword 51, the lateral surface tilted down is vertical while sword 52 in the upper surface of knife 5 as shown in Fig. 3, Fig. 6, and
Top sword 51 exposes the front end face of drilling rod 2, and side sword 52 exposes the side of drilling rod 2, put down between top sword 51 and the blade of center cutter 4
Slip over and cross.Preferably, the diameter D that the rotation of outside 52 of side knife 5 is formed is more than the diameter d of drilling rod 2, to prevent the contact brill of drilling rod 2
The hole wall in hole, increase friction.Further, the diameter D that the rotation of outside 52 of side knife 5 is formed is more than the diameter d about 2- of drilling rod 2
3mm。
Preferably, the height that the rectangular surfaces 42 of center cutter 4 expose the end face of drilling rod 2 is 2.5-3.5mm.
To sum up, the utility model is composited by drilling rod and carbide chip welding.The active section of drilling rod includes two：
Three helical flutes and drilling head.Drilling head is embedded with carbide chip, including center cutter and three side knives.Center cutter is in
Center spike is located at drill axis center, and 120 degree of angle is centrally located on the outside of knife side knife respectively, is combined into tripodia pagoda
Shape cutting end.Three helical flutes are extended respectively in the cutter holder angle of three sides, and each side knife broken material of cutting in drilling leads to
Cross outside helical flute rotation tap.Carbide chip undertakes cutting fragmentation, and drilling rod undertakes connection impact device, passed
The effect of delivery apparatus active force and the broken scrap of transmission discharge.It can be seen that, the utility model have long lifespan, drilling centering it is good,
The high advantage of drilling efficiency.
As known by the technical knowledge, the utility model can be by the realities of other essence or essential feature without departing from its spirit
Scheme is applied to realize.Therefore, embodiment disclosed above, for each side, is all merely illustrative, and is not only
's.All changes in the range of the utility model or in the range of the utility model is equal to are by the utility model bag
Contain.
Claims (9)
1. one kind builds work drill bit, including drilling rod and blade, the blade is fixed on the front end of the drilling rod, and the drilling rod side is set
There is helical flute, the rear end of the drilling rod is formed with the clamping handle matched with impact device, it is characterised in that the spiral row
Bits groove is three helical flutes；
The blade includes center cutter and three side knives；The center cutter is in spike, in the axis in the drilling rod front end face
Heart position；Three side knives distinguish 120 degree of angle, are distributed on the outside of the center cutter；Three helical flute prolongs respectively
Between the angle for extending three side knives so that each side knife broken material of cutting in drilling is arranged into the spiral
Consider groove to be worth doing.
2. according to claim 1 build work drill bit, it is characterised in that the blade is embedded in the front end of the drilling rod.
3. according to claim 1 build work drill bit, it is characterised in that the front end face of the center cutter includes three Ge Xiang centers
The inclined-plane that point shrinks, the back edge on the inclined-plane is downwardly extending between three rectangular surfaces, the adjacent inclined-plane, adjacent
The rectangular surfaces between be provided with vertical V-shaped groove.
4. according to claim 3 build work drill bit, it is characterised in that the V-shaped groove is corresponding with the chip removal extension slot.
5. according to claim 3 build work drill bit, it is characterised in that the top view of the center cutter is similar to Y-shaped, institute
Edge, the end for stating inclined-plane and the rectangular surfaces are round and smooth shape.
6. according to claim 1 build work drill bit, it is characterised in that the upper surface of the side knife is the top tilted down
Sword, lateral surface are vertical side sword, and the top sword exposes the front end face of the drilling rod, and the side sword exposes the drilling rod
Side, seamlessly transit between the blade of the top sword and the center cutter.
7. according to claim 6 build work drill bit, it is characterised in that the outside of the side knife rotates the diameter to be formed and is more than
The diameter of the drilling rod.
8. according to claim 7 build work drill bit, it is characterised in that the outside of the side knife rotates the diameter to be formed and is more than
The drill pipe diameter 2-3mm.
9. according to claim 3 build work drill bit, it is characterised in that the rectangular surfaces of the center cutter expose the drilling rod
The height of end face is 2.5-3.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621370834.2U CN206344312U (en) | 2016-12-14 | 2016-12-14 | Build work drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621370834.2U CN206344312U (en) | 2016-12-14 | 2016-12-14 | Build work drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206344312U true CN206344312U (en) | 2017-07-21 |
Family
ID=59321249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621370834.2U Active CN206344312U (en) | 2016-12-14 | 2016-12-14 | Build work drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206344312U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2016
- 2016-12-14 CN CN201621370834.2U patent/CN206344312U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| GR01 | Patent grant |