CN201823976U - Twist drill - Google Patents

Twist drill Download PDF

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Publication number
CN201823976U
CN201823976U CN2010205122163U CN201020512216U CN201823976U CN 201823976 U CN201823976 U CN 201823976U CN 2010205122163 U CN2010205122163 U CN 2010205122163U CN 201020512216 U CN201020512216 U CN 201020512216U CN 201823976 U CN201823976 U CN 201823976U
Authority
CN
China
Prior art keywords
drill bit
blades
drill
angle
fore
Prior art date
Application number
CN2010205122163U
Other languages
Chinese (zh)
Inventor
濮春辉
Original Assignee
濮春辉
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 濮春辉 filed Critical 濮春辉
Priority to CN2010205122163U priority Critical patent/CN201823976U/en
Application granted granted Critical
Publication of CN201823976U publication Critical patent/CN201823976U/en

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Abstract

The utility model relates to a twist drill, which comprises a drill handle and a drill bit, wherein the drill bit adopts a twisted drill bit. The twist drill is characterized in that the drill bit is in a stepped structure; the diameter of the front end part of the drill bit is smaller than that of the rear end part of the drill bit; two blades are respectively arranged at each of front end part and the rear end part of the drill bit; and the included angle between the two blades at the front end part is the same as the included angle between the two blades at the rear end part. The utility model has the advantages of simple structure, high drilling efficiency and favorable drilling quality and is convenient to use.

Description

A kind of fluted drill

Technical field

The utility model relates to a kind of drill bit, relates in particular to a kind of fluted drill.

Background technology

At present workpiece is carried out for there is higher precision in the hole that guarantees to process, needs subdrilling one aperture, and then carrying out reaming in the processing of hole.Present way is exactly to get out aperture with the path drill bit earlier, changes the drill bit reaming of big footpath then, and operation bothers very much like this, and inefficiency.Also have to be exactly that offset tool easily takes place in reaming after changing big footpath drill bit, to cause the reaming failure.Therefore, need a kind of new technical scheme to solve above-mentioned technical problem.

The utility model content

The purpose of this utility model provides a kind of brill, expands the compound fluted drill of one.

The technical solution adopted in the utility model is:

A kind of fluted drill, comprise drillstock and drill bit, described drill bit is a fried dough twist formula drill bit, described drill bit is a step structure, the fore-end diameter of described drill bit is less than rear end part, be equipped with two blades on described chisel edge part and the rear end part, angle equates between two blades between two blades on the described fore-end on angle and the rear end part.

Described angle is 120-140 °.

Drill bit of the present utility model adopts step structure, and the fore-end diameter of drill bit is less than rear end part, and on chisel edge part and rear end part, be equipped with two blades, fore-end gets out aperture earlier like this, rear end part carries out reaming to aperture simultaneously, need not tool changing, saves time, reduce trouble, improve drilling efficiency; Offset tool takes place during for fear of reaming, and angle between two blades on angle between two blades on the fore-end and the rear end part is designed to equate.

The utility model has the advantages that: simple in structure, easy to use, drilling efficiency is high, drilling quality is good.

Description of drawings

Fig. 1 is an overall structure schematic diagram of the present utility model.

Wherein: 1, drillstock, 2, drill bit, 3, fore-end, 4, rear end part, 5, blade.

The specific embodiment

As shown in Figure 1, a kind of fluted drill comprises drillstock 1 and fried dough twist formula drill bit 2, and drill bit 2 is a step structure, and fore-end 3 diameters of drill bit 2 are less than rear end part 4, and on chisel edge part 3 and rear end part 4, be equipped with two blades 5, and fore-end 3 gets out aperture earlier like this, and 4 pairs of apertures of rear end part carry out reaming simultaneously, need not tool changing, save time, reduce trouble, improve drilling efficiency; Offset tool takes place during for fear of reaming, and 5 angles of two blades on the fore-end 3 are designed to equate with 5 angles of two blades on the rear end part 4, and are and are 120-140 °.

Claims (2)

1. fluted drill, comprise drillstock and drill bit, described drill bit is a fried dough twist formula drill bit, it is characterized in that: described drill bit is a step structure, the fore-end diameter of described drill bit is less than rear end part, be equipped with two blades on described chisel edge part and the rear end part, angle equates between two blades between two blades on the described fore-end on angle and the rear end part.
2. a kind of fluted drill according to claim 1 is characterized in that: described angle is 120-140 °.
CN2010205122163U 2010-08-30 2010-08-30 Twist drill CN201823976U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010205122163U CN201823976U (en) 2010-08-30 2010-08-30 Twist drill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010205122163U CN201823976U (en) 2010-08-30 2010-08-30 Twist drill

Publications (1)

Publication Number Publication Date
CN201823976U true CN201823976U (en) 2011-05-11

Family

ID=43962534

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010205122163U CN201823976U (en) 2010-08-30 2010-08-30 Twist drill

Country Status (1)

Country Link
CN (1) CN201823976U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102825304A (en) * 2011-06-17 2012-12-19 马克托罗工业株式会社 Drill bit
CN104416202A (en) * 2013-09-02 2015-03-18 天工爱和特钢有限公司 Multi-sectional drill bit
CN105458354A (en) * 2014-09-12 2016-04-06 贵州西南工具(集团)有限公司 Novel composite material drilling bit and manufacturing method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102825304A (en) * 2011-06-17 2012-12-19 马克托罗工业株式会社 Drill bit
CN104416202A (en) * 2013-09-02 2015-03-18 天工爱和特钢有限公司 Multi-sectional drill bit
CN105458354A (en) * 2014-09-12 2016-04-06 贵州西南工具(集团)有限公司 Novel composite material drilling bit and manufacturing method thereof

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Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110511

Termination date: 20110830

C17 Cessation of patent right