CN203209750U - Step drill - Google Patents
Step drill Download PDFInfo
- Publication number
- CN203209750U CN203209750U CN 201320205164 CN201320205164U CN203209750U CN 203209750 U CN203209750 U CN 203209750U CN 201320205164 CN201320205164 CN 201320205164 CN 201320205164 U CN201320205164 U CN 201320205164U CN 203209750 U CN203209750 U CN 203209750U
- Authority
- CN
- China
- Prior art keywords
- step drill
- cutter
- chip removal
- blade
- blade part
- 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.)
- Expired - Lifetime
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- Drilling Tools (AREA)
Abstract
The utility model aims to provide a step drill with a small diameter, which can improve step drill bit strength and a chip removal effect, then prolongs the service life of a cutter and saves use cost of a customer. The step drill comprises a handle part and a blade part, wherein a chip removal groove is formed in the blade part, and critically, the core thickness of the blade part is larger than or equal to 38% of the diameter of the end part of the blade part. The step drill provided by the utility model has larger core thickness and groove width and shallower grooving, thereby improving the cutter strength, enhancing chip removal effect and prolonging service life of the cutter, and besides, the step drill has good practicability and has a smaller diameter.
Description
Technical field
The utility model belongs to cutter manufacturing technology field, specially refers to a kind of step drill.
Background technology
Drill bit is mainly used in the roughing in hole as an important component part in the machining usefulness cutter.Along with the development of mechanical industry, the 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 minor diameter step drill core thickness rate of traditional design is less, and the cutter strength ratio is relatively poor, and groove width is smaller, and the chip removal effect is bad, occurs breaking phenomenon easily.
The utility model content
The purpose of this utility model is the step drill that proposes a kind of minor diameter, can improve intensity and the chip removal effect of step drill drill bit, thereby improves the life-span of cutter, saves client's use cost.
Step drill of the present utility model comprises shank and blade, and blade is provided with chip area, and key is that the core of described blade is thick in 38% of blade end diameter.The core thickness rate of step drill is bigger like this, and it is superficial to slot, and has improved cutter intensity greatly.
Further, the groove width/across back of the chip area of described blade has strengthened the chip removal effect more than or equal to 1.5, thereby has improved the service life of cutter, has saved use cost.
The core thickness rate of step drill of the present utility model is bigger, and it is superficial to slot, and groove width is bigger, thereby has both improved the intensity of cutter, has strengthened the chip removal effect again, has improved the service life of cutter, has good practicability, is specially adapted to the less step drill of diameter.
Description of drawings
Fig. 1 is the structural representation of step drill of the present utility model.
The specific embodiment
Contrast accompanying drawing below, by the description to embodiment, the effect of the mutual alignment between the shape of the specific embodiment of the present utility model such as related each member, structure, the each several part and annexation, each several part and operation principle etc. are described in further detail.
Embodiment:
As shown in Figure 1, the step drill of present embodiment utilizes numerical control five-axle interlock grinding machine, independently writes knives routine and processes, and its matrix material adopts carbide alloy, and the surface is provided with the TIALN coating.Specifically, drill bit comprises shank 1 and blade 2, and blade 2 is provided with chip area 3, the core of blade 2 is thick to be 38% of blade end 4 diameters, and the ratio of the groove width of chip area 3 and its across back 5 equals 1.5, and the core thickness rate of step drill is bigger like this, it is superficial to slot, and has improved cutter intensity greatly; Strengthen the chip removal effect simultaneously, thereby improved the service life of cutter, saved use cost.
Claims (2)
1. a step drill comprises shank and blade, and blade is provided with chip area, it is characterized in that the core of described blade is thick in 38% of blade end diameter.
2. step drill according to claim 1 is characterized in that the groove width/across back of chip area of described blade is more than or equal to 1.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320205164 CN203209750U (en) | 2013-04-22 | 2013-04-22 | Step drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320205164 CN203209750U (en) | 2013-04-22 | 2013-04-22 | Step drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203209750U true CN203209750U (en) | 2013-09-25 |
Family
ID=49199321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320205164 Expired - Lifetime CN203209750U (en) | 2013-04-22 | 2013-04-22 | Step drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203209750U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108405935A (en) * | 2018-06-11 | 2018-08-17 | 常熟市磊王合金工具有限公司 | A kind of drill bit using multitool access slot |
-
2013
- 2013-04-22 CN CN 201320205164 patent/CN203209750U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108405935A (en) * | 2018-06-11 | 2018-08-17 | 常熟市磊王合金工具有限公司 | A kind of drill bit using multitool access slot |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130925 |