CN205733143U - A kind of three traverse drill reaming step drill - Google Patents
A kind of three traverse drill reaming step drill Download PDFInfo
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- CN205733143U CN205733143U CN201520788481.7U CN201520788481U CN205733143U CN 205733143 U CN205733143 U CN 205733143U CN 201520788481 U CN201520788481 U CN 201520788481U CN 205733143 U CN205733143 U CN 205733143U
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Abstract
This utility model provides a kind of three traverse drill reaming step drill, including working portion and the clamping part of connection working portion one end, working portion is made up of the chip pocket formed between three cutting portions and each two cutting portion, and each cutting portion is formed by cutting edge and chisel edge.The beneficial effects of the utility model are: chisel edge and the main cutting edge of working portion front end increase anterior angle at drill core through reconditioning, decrease the length of chisel edge.Which reducing cutting resistance and axial drag, the drill bit drill core thickness after improvement is big, and rigidity and guidance quality are good, and centering is accurately.Cutting edge is become after three grooves from two grooves simultaneously so that feed of every rotation increases, and can carry out high-efficient cutting thus can be greatly shortened and improve work efficiency process time.Due to three sword stable cutting, can improve machining accuracy, the cylindricity of hole shape, surface roughness, rectilinearity all have more improvement.Size can reach semifinishing precision.
Description
Technical field
This utility model relates to a kind of step drill, a kind of three traverse drill reaming step drill.
Background technology
Step drill is generally used for thickness at below 10mm sheet material Drilling operation.Bit diameter is made multistage from φ 3-φ 60,
It uses step cutting edge at most can save with 14.The structure of drill bit is formed and is typically processed as two grooves, grooved have straight trough profile of tooth, etc.
Helical pitch helical tooth and equal helix angle helical tooth three kinds.Step drill cutting tip is by 90 ° of cutting edges and the cylinder of multistage different-diameter
Part composition, cutting edge foremost is the same with fluted drill is split into 135 ° of drift angle cutting edges.90 ° of cutting edge relief grinding relief angles respectively,
Column part relief grinding back draught and circumference relief angle.Shank is generally divided into hexagonal handle, cylindrical handle and three bone knobs three kinds.Because drill bit
One joint diameter is little so centering very well, can cut the hole of different-diameter, boring, reaming can be combined into a feed and be added again
Work completes.Therefore it is widely used in decoration, five metals, automobile and other industries.
Along with developing rapidly of modern manufacturing industry, the directions such as cutting tool forward is accurate, efficient, energy-conservation are developed, to step
Bore the concern being also not only abrasion durability, also the precision in processed hole, roughness, burr etc. are carried out overall merit.By
Drilling into two grooves in tradition step, its construction features determines that it can only achieve boring roughing requirement, adds to be easily generated man-hour and shakes
Dynamic, it cannot be guaranteed that aperture size precision when reaming, hole wall surface roughness quality is the lowest, and two groove step drill are in many occasions
Do not reach the prescription to processing plate hole.
Therefore, need to design a kind of three traverse drill reaming step drill for the problem in above-mentioned.
Utility model content
The technical problems to be solved in the utility model is to overcome existing defect, it is provided that a kind of three traverse drill reaming step drill,
It is provided with three main cutting edges, three chisel edges and three chip pockets.
In order to solve above-mentioned technical problem, this utility model provides following technical scheme:
This utility model provides a kind of three traverse drill reaming step drill, including working portion and connect described working portion one
The clamping part of end, it is characterised in that described working portion is by the appearance formed between cutting portion described in three cutting portions and each two
Bits groove composition, each described cutting portion is formed by cutting edge and chisel edge.
As a kind of optimal technical scheme of the present utility model, described cutting edge is by the main cutting being located at working portion one end
Sword and minor cutting edge composition, the top of described main cutting edge is 135 °, and described minor cutting edge is the most straight with multistage by 90 ° of cutting edges
The cylinder cutting edge composition in footpath.
As a kind of optimal technical scheme of the present utility model, described clamping part connects driving means.
The beneficial effects of the utility model are: chisel edge and the main cutting edge of working portion front end increase drill core through reconditioning
Place's anterior angle, decreases the length of chisel edge.Which reducing cutting resistance and axial drag, the drill bit drill core thickness after improvement is big,
Rigidity and guidance quality are good, and centering is accurately.Cutting edge is become after three grooves from two grooves simultaneously so that feed of every rotation increases, and can carry out
High-efficient cutting thus can be greatly shortened and improve work efficiency process time.Due to three sword stable cutting, machining accuracy can be improved,
The cylindricity of hole shape, surface roughness, rectilinearity all have more improvement.Size can reach semifinishing precision.
Accompanying drawing explanation
Accompanying drawing is used for providing being further appreciated by of the present utility model, and constitutes a part for description, with this practicality
Novel embodiment is used for explaining this utility model together, is not intended that restriction of the present utility model.
In the accompanying drawings:
Fig. 1 is structural representation of the present utility model；
Fig. 2 is end face close-up schematic view of the present utility model；
Fig. 3 is the chisel edge grooving schematic diagram in B-B direction in Fig. 2；
Fig. 4 is grinding wheel structure schematic diagram of the present utility model；
Label in figure: 1, working portion；2, clamping part；3, cutting portion；301, main cutting edge；302, minor cutting edge；3021、
90 ° of cutting edges；3022, cylinder cutting edge；4, chip pocket；5, chisel edge；6, emery wheel；7, grooving.
Detailed description of the invention
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is illustrated, it will be appreciated that described herein excellent
Select embodiment to be merely to illustrate and explain this utility model, being not used to limit this utility model.
Embodiment 1
As it is shown in figure 1, this utility model provides a kind of three traverse drill reaming step drill, including working portion 1 and connection institute
Stating the clamping part 2 of working portion 1 one end, working portion 1 is by the appearance bits formed between three cutting portions 3 and each two cutting portion 3
Groove 4 forms, and each cutting portion 3 is formed by cutting edge and chisel edge 5.
Cutting edge is made up of the main cutting edge 301 and minor cutting edge 302 being located at working portion 1 one end, main cutting edge 301
Top is 135 °, and minor cutting edge 302 is made up of the cylinder cutting edge 3022 of 90 ° of cutting edges 3021 and multistage different-diameter, cuts for 90 °
Cut sword 3021 relief grinding relief angle, cylinder cutting edge 3022 relief grinding back draught and circumference relief angle respectively.
Three groove step drill are bigger with torque to power than common step auger spindle, therefore to select relatively thin drill core as far as possible, its
Sharpening pattern below is identical with common fluted drill, two adjacent after be crossed to form a curved chisel edge 5, such three
Bar chisel edge 5 junction and the pointed cone of drill core, have the anterior angle that negative value is bigger.Chisel edge 5 must be carried out reconditioning for improving cutting state,
Increase anterior angle at apex point.
Clamping part 2 is generally fabricated to hexagonal handle, is clamped in and has on the hand-operated tools of fast interface or hand-held during use
On electric tool.
As in Figure 2-4, when emery wheel 6 carries out slotting reconditioning to chisel edge 5, emery wheel is gradually cut, shallower at drill core,
Grooving 7 is near adjacent chisel edge 5, but does not cuts through.The groove of grooving 7 is low constitutes oblique angle with axis, and general oblique angle is 30 °-40 °, cuts
Low circular arc R 1=0.5-1mm of groove of groove 7.Due to three cutting lands, the cylindricity in the good processed hole of drilling guidance quality has substantially
Improving, the most anti-radial impact ability is strong, and reaming precision is high, can reach semifinishing requirement.
Chisel edge 5 and the main cutting edge 301 of working portion front end of the present utility model increase anterior angle at drill core through reconditioning,
Decrease the length of chisel edge 5.Which reducing cutting resistance and axial drag, the drill bit drill core thickness after improvement is big, rigidity and
Guidance quality is good, and centering is accurately.Cutting edge is become after three grooves from two grooves simultaneously so that feed of every rotation increases, and can efficiently cut
Cut thus can be greatly shortened and improve work efficiency process time.Due to three sword stable cutting, machining accuracy can be improved, hole shape
Cylindricity, surface roughness, rectilinearity all have more improvement.Size can reach semifinishing precision.
Last it is noted that the foregoing is only preferred embodiment of the present utility model, it is not limited to this
Utility model, although being described in detail this utility model with reference to previous embodiment, for those skilled in the art
For, the technical scheme described in foregoing embodiments still can be modified by it, or to wherein portion of techniques feature
Carry out equivalent.All within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made, all
Within protection domain of the present utility model should be included in.
Claims (3)
1. a three traverse drill reaming step drill, including working portion and the clamping part that connects described working portion one end, it is special
Levying and be, described working portion is made up of the chip pocket formed between cutting portion described in three cutting portions and each two, Mei Gesuo
State cutting portion to be formed by cutting edge and chisel edge.
A kind of three traverse drill reaming step drill the most according to claim 1, it is characterised in that described cutting edge is described by being located at
The main cutting edge of working portion one end and minor cutting edge composition, the top of described main cutting edge is 135 °, described minor cutting edge by
The cylinder cutting edge composition of 90 ° of cutting edges and multistage different-diameter.
A kind of three traverse drill reaming step drill the most according to claim 1, it is characterised in that described clamping part connects driving dress
Put.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520788481.7U CN205733143U (en) | 2015-10-09 | 2015-10-09 | A kind of three traverse drill reaming step drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520788481.7U CN205733143U (en) | 2015-10-09 | 2015-10-09 | A kind of three traverse drill reaming step drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205733143U true CN205733143U (en) | 2016-11-30 |
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ID=57388900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520788481.7U Active CN205733143U (en) | 2015-10-09 | 2015-10-09 | A kind of three traverse drill reaming step drill |
Country Status (1)
| Country | Link |
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| CN (1) | CN205733143U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106563839A (en) * | 2015-10-09 | 2017-04-19 | 镇江市丹徒区甬江工具厂 | Three-slot reaming step drill |
| CN110434570A (en) * | 2019-08-27 | 2019-11-12 | 四川科思精密模具有限公司 | A kind of processing method of hard mold centre hole |
-
2015
- 2015-10-09 CN CN201520788481.7U patent/CN205733143U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106563839A (en) * | 2015-10-09 | 2017-04-19 | 镇江市丹徒区甬江工具厂 | Three-slot reaming step drill |
| CN110434570A (en) * | 2019-08-27 | 2019-11-12 | 四川科思精密模具有限公司 | A kind of processing method of hard mold centre hole |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180622 Address after: 212124 Zhenjiang, Dantu, Jiangsu, Fengzhen, Xun Huang Huang Village West Yellow Patentee after: Jiangsu Yong run Tools Co., Ltd. Address before: 212141 Zhenjiang, Dantu, Jiangsu, Fengzhen, Xun Huang Huang Village West Yellow Patentee before: Zhenjiang city Dantu District Yongjiang Tools Factory |
|
| TR01 | Transfer of patent right |