CN104174902A - High-precision inner-cooling stepped drill - Google Patents

High-precision inner-cooling stepped drill Download PDF

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Publication number
CN104174902A
CN104174902A CN201310188709.4A CN201310188709A CN104174902A CN 104174902 A CN104174902 A CN 104174902A CN 201310188709 A CN201310188709 A CN 201310188709A CN 104174902 A CN104174902 A CN 104174902A
Authority
CN
China
Prior art keywords
blade
precision
drill
cooling
stepped 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.)
Pending
Application number
CN201310188709.4A
Other languages
Chinese (zh)
Inventor
李振丰
孔小波
奚旭东
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SUZHOU TIMA PRECISION MACHINERY Co Ltd
Original Assignee
SUZHOU TIMA PRECISION MACHINERY Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SUZHOU TIMA PRECISION MACHINERY Co Ltd filed Critical SUZHOU TIMA PRECISION MACHINERY Co Ltd
Priority to CN201310188709.4A priority Critical patent/CN104174902A/en
Publication of CN104174902A publication Critical patent/CN104174902A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B51/00Tools for drilling machines
    • B23B51/009Stepped drills
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B51/00Tools for drilling machines
    • B23B51/06Drills with lubricating or cooling equipment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B2251/00Details of tools for drilling machines
    • B23B2251/04Angles, e.g. cutting angles
    • B23B2251/043Helix angles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B2251/00Details of tools for drilling machines
    • B23B2251/18Configuration of the drill point

Abstract

The invention aims at providing a high-precision inner-cooling stepped drill, capable of improving strength and abrasive resistance, improving processing precision, prolonging the service life of a tool and reducing the use cost of a client. The high-precision inner-cooling stepped drill provided by the invention comprises a hilt part and a blade part; a water inlet passage is formed in the hilt part in a penetrating manner; a chip groove and a side blade are arranged along the axial direction of the blade part. The high-precision inner-cooling stepped drill is characterized in that the end part of the blade part is a flat base, and an R angle is set at the end part; the helical angle of the inner-cooling stepped drill is smaller than or equal to 25 degrees; an outfall 7 communicated with the water inlet passage is formed in the side face of the end part of the blade part; the outfall 7 faces the direction of the chip groove. According to the high-precision inner-cooling stepped drill provided by the invention, the smaller helical angle is set, and a chamfering mode is adopted by a tool nose, so that the tool is higher in strength, and the abrasion resistance of the tool nose is improved, and therefore the service life of the tool is prolonged; moreover, auxiliary edges 8 are respectively arranged at both sides of the side blade, so that the processing precision is improved.

Description

A kind of high-precision inner-cooling step drill
Technical field
The invention belongs to cutter manufacturing technology field, specially refer to a kind of high-precision inner-cooling step drill.
Background technology
Drill bit, as an important component part in cutter for machining, is mainly used in the roughing in hole.Along with the development of machinery industry, user is to having proposed requirements at the higher level delivery date of the crudy of product, process reliability, working (machining) efficiency, cutter etc.The point of a knife of the step drill of traditional design is taked 140 ° of drift angle forms, and its helical angle is 30 °, and easily serious wear, cutter break.
Summary of the invention
The object of the invention is to propose a kind of high-precision inner-cooling step drill, can improve intensity and wearability, and improve the life-span of machining accuracy and cutter, save client's use cost.
High-precision inner-cooling step drill of the present invention comprises shank and blade, and described shank runs through and is provided with into aquaporin, and described blade offers chip area and side edge vertically, and the end that it is characterized in that described blade is flat, and described end is provided with R angle; The helical angle of described interior cold step drill is less than or equal to 25 degree; The side of described blade end is provided with described and enters the discharge outlet 7 that aquaporin communicates, and described discharge outlet 7 is towards chip area direction.
The end of blade is provided with R angle, can before boring, first remove surplus, has protected point of a knife, and wearing and tearing also can be smaller, contributes to reduce the surface roughness of machining hole; Traditional interior cold step drill adopts top form, and centering is unstable, and blade of the present invention end is flat, and centering is stable, has improved the positional precision of machining hole.In addition, the helical angle of interior cold step drill of the present invention is less than or equal to 25 degree, slot superficial, thereby it is thick to have increased core, has improved the intensity of cutter, is difficult for breaking.In addition, discharge outlet 7 is arranged on to the end of chip area and towards chip area, is conducive to go out the iron filings that gather in chip area, not only improved chip removal performance, and iron filings can take away a large amount of heats, thereby reduce the temperature of blade, improve crudy, extended the service life of cutter.
Further, the both sides of described side edge are equipped with auxiliary seamed edge, auxiliary seamed edge can make the contact force between side edge and the inwall of boring increase gradually, thereby avoids contact force to increase suddenly and cause side edge to damage or drill hole inner wall crumbles, and then guarantees precision and the smoothness of drill hole inner wall.
High-precision inner-cooling step drill of the present invention passes through less helical angle is set, and takes chamfering form at point of a knife, makes cutter have higher intensity, improved the abrasion resistance of point of a knife, thereby improved the service life of cutter, and by the both sides at side edge, auxiliary seamed edge 8 has been set, improved machining accuracy.
Accompanying drawing explanation
Fig. 1 is the structural representation of high-precision inner-cooling step drill of the present invention.
Fig. 2 is the end face structure schematic diagram of Fig. 1.
The specific embodiment
Contrast accompanying drawing below, by the description to embodiment, the specific embodiment of the present invention is described in further detail as the effect of the mutual alignment between the shape of each related member, structure, each several part and annexation, each several part and operation principle etc.
Embodiment:
As shown in Figure 1, 2, the high-precision inner-cooling step drill of the present embodiment comprises shank 1 and blade 2, and described shank 1 runs through and is provided with into aquaporin 3, and described blade 2 offers chip area 4 and side edge 5 vertically, the end that it is characterized in that described blade 2 is flat, and described end is provided with R angle 6; The pitch angle alpha will of described interior cold step drill is 25 degree; The side of described blade 2 ends is provided with described and enters the discharge outlet 7 that aquaporin 3 communicates, and described discharge outlet 7 is towards chip area 4 directions.
Further, the both sides of described side edge 5 are equipped with auxiliary seamed edge 8, auxiliary seamed edge 8 can make the contact force between the inwall of side edge 5 and boring increase gradually, thereby avoids contact force to increase suddenly and cause side edge 5 to damage or drill hole inner wall crumbles, and then precision and the smoothness of assurance drill hole inner wall.
The end of blade 2 is provided with R angle 6, can before boring, first remove surplus, has protected point of a knife, and wearing and tearing also can be smaller, contributes to reduce the surface roughness of machining hole; Traditional interior cold step drill adopts top form, and centering is unstable, and blade of the present invention 2 ends are flat, and centering is stable, has improved the positional precision of machining hole.In addition, the helical angle of interior cold step drill of the present invention is less than or equal to 25 degree, slot superficial, thereby it is thick to have increased core, has improved the intensity of cutter, is difficult for breaking.In addition, discharge outlet 7 is arranged on to the end of chip area 4 and towards chip area 4, be conducive to go out interior the gathered iron filings of chip area 4, not only improved chip removal performance, and iron filings can be taken away a large amount of heats, thereby the temperature that has reduced blade 2, has improved crudy, has extended the service life of cutter.

Claims (2)

1. a high-precision inner-cooling step drill, comprises shank and blade, and described shank runs through and is provided with into aquaporin, and described blade offers chip area and side edge vertically, and the end that it is characterized in that described blade is flat, and described end is provided with R angle; The helical angle of described interior cold step drill is less than or equal to 25 degree; The side of described blade end is provided with described and enters the discharge outlet 7 that aquaporin communicates, and described discharge outlet 7 is towards chip area direction.
2. interior cold step drill according to claim 1, is characterized in that the both sides of described side edge are equipped with auxiliary seamed edge.
CN201310188709.4A 2013-05-21 2013-05-21 High-precision inner-cooling stepped drill Pending CN104174902A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310188709.4A CN104174902A (en) 2013-05-21 2013-05-21 High-precision inner-cooling stepped drill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310188709.4A CN104174902A (en) 2013-05-21 2013-05-21 High-precision inner-cooling stepped drill

Publications (1)

Publication Number Publication Date
CN104174902A true CN104174902A (en) 2014-12-03

Family

ID=51956401

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310188709.4A Pending CN104174902A (en) 2013-05-21 2013-05-21 High-precision inner-cooling stepped drill

Country Status (1)

Country Link
CN (1) CN104174902A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108480722A (en) * 2018-06-11 2018-09-04 常熟市磊王合金工具有限公司 A kind of interior cold subland drill of shank grooving lap guard bits
CN110253055A (en) * 2019-06-11 2019-09-20 上海拓璞数控科技股份有限公司 PCD suitable for processing carbon fibre composite bores ream one compound tool

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1190917A (en) * 1995-07-14 1998-08-19 克纳门特尔-赫特尔刀具及硬质材料股份有限公司 Drill with cooling-lubricant channel
CN1192709A (en) * 1995-08-08 1998-09-09 克纳门特尔-赫特尔刀具及硬质材料股份有限公司 Method of providing rotating cutting tool with lubricating coolant, and tool and tool-holder for carrying out the method
CN101524769A (en) * 2009-04-20 2009-09-09 刘新平 Inner-cooling indexable step drill and method for fabricating step hole
CN102581356A (en) * 2012-03-21 2012-07-18 锑玛(苏州)精密工具有限公司 Internal cold drill
CN103042259A (en) * 2012-12-12 2013-04-17 锑玛(苏州)精密工具有限公司 Inner-cooling stepped drill

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1190917A (en) * 1995-07-14 1998-08-19 克纳门特尔-赫特尔刀具及硬质材料股份有限公司 Drill with cooling-lubricant channel
CN1192709A (en) * 1995-08-08 1998-09-09 克纳门特尔-赫特尔刀具及硬质材料股份有限公司 Method of providing rotating cutting tool with lubricating coolant, and tool and tool-holder for carrying out the method
CN101524769A (en) * 2009-04-20 2009-09-09 刘新平 Inner-cooling indexable step drill and method for fabricating step hole
CN102581356A (en) * 2012-03-21 2012-07-18 锑玛(苏州)精密工具有限公司 Internal cold drill
CN103042259A (en) * 2012-12-12 2013-04-17 锑玛(苏州)精密工具有限公司 Inner-cooling stepped drill

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108480722A (en) * 2018-06-11 2018-09-04 常熟市磊王合金工具有限公司 A kind of interior cold subland drill of shank grooving lap guard bits
CN110253055A (en) * 2019-06-11 2019-09-20 上海拓璞数控科技股份有限公司 PCD suitable for processing carbon fibre composite bores ream one compound tool

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Application publication date: 20141203

WD01 Invention patent application deemed withdrawn after publication