CN203076665U - Stepped twist drill - Google Patents
Stepped twist drill Download PDFInfo
- Publication number
- CN203076665U CN203076665U CN 201320078843 CN201320078843U CN203076665U CN 203076665 U CN203076665 U CN 203076665U CN 201320078843 CN201320078843 CN 201320078843 CN 201320078843 U CN201320078843 U CN 201320078843U CN 203076665 U CN203076665 U CN 203076665U
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- Prior art keywords
- drill
- drill body
- stage casing
- segment
- drillstock
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Abstract
The utility model relates to a stepped twist drill. The utility model aims to provide the stepped twist drill which has a simple structure and is convenient to process to enable the drilling advance process of the twist drill to be smoother. The stepped twist drill comprises a drill bit and a drillstock and is characterized in that the drill bit is divided into a drill point, a middle-segment drill body and a rear-segment drill body in sequence; the diameter of the middle-segment drill body is 0.8 times that of the rear drill body; the diameter of the drill point is 0.8 that of the middle-segment drill body; the drill point and the middle-segment drill body as well as the middle-segment drill body and the rear-segment drill body transit via connection segments; and the sides of chip pockets of the connection segments are polished sharp. The stepped twist drill is applicable to machining tools.
Description
Technical field
The utility model relates to a kind of fluted drill, especially a kind of staged fluted drill.Be applicable to machine tool.
Background technology
Fluted drill is that rotary cutting by its relative fixed axis is with the instrument of the circular hole of drilling workpiece.At present, workpiece holed adds man-hour, advances situation of difficult because the fluted drill bit diameter tends to run into drill bit more greatly, also can cause the damage that can not repair to drill bit when serious.
Summary of the invention
The technical problems to be solved in the utility model is: at the problem of above-mentioned existence, provide a kind of staged fluted drill simple in structure, easy to process, so that Twist Drill is more smooth and easy when advancing.
The technical scheme that the utility model adopted is: a kind of staged fluted drill, form by drill bit and drillstock, it is characterized in that: described drill bit is divided into apex point, stage casing drill body and back segment drill body successively, described stage casing drill body diameter is 0.8 of a back segment drill body diameter, described apex point diameter is 0.8 of a stage casing drill body, between apex point and the stage casing drill body, between stage casing drill body and the back segment drill body all through the linkage section transition; The chip pocket trough rim polishing of described linkage section is sharp.
Described drillstock is provided with screw thread and is furnished with nut.
Axial hollow in the described drillstock, the aluminium section of plug-in mounting good heat conductivity in it.
The beneficial effects of the utility model are: 1, the utility model drill bit is divided into three parts, and reduces successively to the bit point of the drill diameter from the drillstock side, the resistance when reducing the drill bit propelling, and it is lighter that drill bit is crept into.2, the utility model is simple in structure, easily manufactured, thread handle is set on drillstock is furnished with nut, and drill bit pierces rear nut will be stuck in the place, aperture, so can determine the degree of depth that pierces of fluted drill by the distance of regulating nut and bit point of the drill.3, the better aluminium section of present embodiment plug-in mounting heat conductivility in drillstock, the heat that can effectively the drill bit place be produced passes to fast and dissipates, and effectively avoids drill bit overheated.
Description of drawings
Fig. 1 is the structural representation of embodiment.
Fig. 2 is the left view of embodiment.
The specific embodiment
As shown in Figure 1 and Figure 2, present embodiment is a kind of staged fluted drill, is made up of drill bit 1 and drillstock 2.Drill bit 1 is divided into apex point 101, stage casing drill body 102 and back segment drill body 103 successively in the present embodiment, wherein drill body 102 diameters in stage casing are 0.8 of back segment drill body 103 diameters, apex point 101 diameters are 0.8 of stage casing drill body 102, and between apex point 101 and the stage casing drill body 102, between stage casing drill body 102 and the back segment drill body 103 all through linkage section 104 smooth transition.For guaranteeing normally bore operation of drill bit, that the chip pocket trough rim polishing of linkage section 104 is sharp.
Be provided with screw thread 3 in this example and be furnished with nut 4 on drillstock 2, this nut is smooth by the smooth surface of drill bit side.Drill bit pierces object rear nut 4 will be stuck in the place, aperture, so can determine the degree of depth that pierces of fluted drill by the distance of regulating nut 4 and bit point of the drill.
Axial hollow in the drillstock section in the present embodiment, the aluminium section 5 of plug-in mounting good heat conductivity in it passes to fast with the heat that effectively the drill bit place is produced and to dissipate, and effectively avoids drill bit overheated.
Certainly, above-mentioned explanation is not to restriction of the present utility model, and the utility model also is not limited to above-mentioned giving an example; those skilled in the art; in scope of the present utility model, the variation of making, change and add or replace, all should belong to protection domain of the present utility model.
Claims (3)
1. staged fluted drill, form by drill bit (1) and drillstock (2), it is characterized in that: described drill bit (1) is divided into apex point (101), stage casing drill body (102) and back segment drill body (103) successively, described stage casing drill body (102) diameter is 0.8 of back segment drill body (a 103) diameter, described apex point (101) diameter is 0.8 of a stage casing drill body (102), between apex point (101) and the stage casing drill body (102), between stage casing drill body (102) and the back segment drill body (103) all through linkage section (104) transition; The chip pocket trough rim polishing of described linkage section (104) is sharp.
2. staged fluted drill according to claim 1 is characterized in that: described drillstock (2) is provided with screw thread (3) and is furnished with nut (4).
3. fluted drill according to claim 1 and 2 is characterized in that: axial hollow in the described drillstock (2), the aluminium section (5) of plug-in mounting good heat conductivity in it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320078843 CN203076665U (en) | 2013-02-20 | 2013-02-20 | Stepped twist drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320078843 CN203076665U (en) | 2013-02-20 | 2013-02-20 | Stepped twist drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203076665U true CN203076665U (en) | 2013-07-24 |
Family
ID=48822542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320078843 Expired - Fee Related CN203076665U (en) | 2013-02-20 | 2013-02-20 | Stepped twist drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203076665U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105458355A (en) * | 2015-12-03 | 2016-04-06 | 洛阳丰泰铝业有限公司 | Multifunctional spiral bit |
| CN107498095A (en) * | 2017-09-20 | 2017-12-22 | 江苏天工工具有限公司 | A kind of left-handed three swords milling is bored |
| CN107511512A (en) * | 2017-09-20 | 2017-12-26 | 江苏天工工具有限公司 | A kind of right rotation three-wing bit |
-
2013
- 2013-02-20 CN CN 201320078843 patent/CN203076665U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105458355A (en) * | 2015-12-03 | 2016-04-06 | 洛阳丰泰铝业有限公司 | Multifunctional spiral bit |
| CN107498095A (en) * | 2017-09-20 | 2017-12-22 | 江苏天工工具有限公司 | A kind of left-handed three swords milling is bored |
| CN107511512A (en) * | 2017-09-20 | 2017-12-26 | 江苏天工工具有限公司 | A kind of right rotation three-wing bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130724 Termination date: 20140220 |