CN2622376Y - Bull step shaped three-cutter drill bit - Google Patents
Bull step shaped three-cutter drill bit Download PDFInfo
- Publication number
- CN2622376Y CN2622376Y CN 03227457 CN03227457U CN2622376Y CN 2622376 Y CN2622376 Y CN 2622376Y CN 03227457 CN03227457 CN 03227457 CN 03227457 U CN03227457 U CN 03227457U CN 2622376 Y CN2622376 Y CN 2622376Y
- Authority
- CN
- China
- Prior art keywords
- sword sheet
- utility
- central
- sheet
- model
- 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 - Fee Related
Links
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model relates to a straight line staircase three point bit, which belongs to the rock drilling tools. The utility model is to solve defects of poor powder discharging, slow tunneling, fast abrasion, high cost and heavy waste of alloy of outdated slice shape hard alloy bits and button alloy bits. The utility model contains a drilling body with a cone hole; the straight line staircase shape on the top of the drilling body is provided with a central cutting blade and a pair of cutting blades laterally positioned, and the height between is h; a compensation block is positioned between the central cutting blade and the laterally positioned cutting blades; a pair of inclined through holes go through the outer wall of the drilling body and the cone hole. The utility model is mainly used as a rock drilling tool.
Description
Technical field
The utility model relates to an a kind of word ladder three sword bore bits, and it belongs to drill rod.
Background technology
Bore bit is mounted in the instrument that is used for Drilling borehole on the rock on the hammer drill drill steel.Old-fashioned sheet carbide bore bit, its carbide alloy cutting edge are overlooked cross section and are the approximate rectangular of two ends circular arc, and the bottom surface is the plane, and its defective is the waste alloy, and row's powder is poor, and driving speed is slow, and impact resistance is also poor; Spherical tooth drill bit, carbide alloy cutting edge are sphere or wedge shape, and the bottom surface is the plane, and its defective is an alloy property requirement height, and manufacture difficulty is big, and the cutting edge of can not refacing, and waste of material is big.
Summary of the invention
The purpose of this utility model is to provide an a kind of word ladder three sword bore bits, to overcome the multiple deficiency of original sheet carbide bore bit and ball tooth hard alloy drill.
The so-called word ladder of the utility model three sword bore bits contain the pricker body 1 of being with taper hole 8, it is characterized in that, be provided with a central sword sheet 2 and a pair of side sword sheet 3 at the top of described pricker body 1 a word ladder, the difference in height of the two is h, between central sword sheet 2 and side sword sheet 3, be situated between and be provided with compensation block 4, simultaneously, between described pricker body 1 outer wall and taper hole 8, tiltedly passed through a pair of limbers 5.
Described central sword sheet 2 its both ends of the surface width equate that its bottom surface is plane or cambered surface.
Described side sword sheet 3 its both ends of the surface width do not wait or equate that its bottom surface is the plane, cambered surface, the garden conical surface or wedge surface.
Described central sword sheet 2 and side sword sheet 3 are carbide alloy sword sheet, and the difference in height h＜10mm of central sword sheet 2 and side sword sheet 3.
The utlity model has following advantage: at first, because central sword sheet and a pair of limbers have been arranged, it has higher driving speed; Secondly, between central sword sheet and side sword sheet, compensation block is arranged, add that the volume of side sword sheet outer face increases, both obviously improved its impact resistance, also prolonged its application life; At last, it makes originally also lower.
Description of drawings
Accompanying drawing 1 is the structural representation of a kind of embodiment of the utility model.
Accompanying drawing 2 is that the A of accompanying drawing 1 is to view.
Accompanying drawing 3 and accompanying drawing 4 are respectively the structural representations of a kind of embodiment of the utility model used side sword sheet and central sword sheet.
Among the figure: 1 pricker body, 2 central sword sheets, 3 side sword sheets, 4 compensation blocks, 5 limberss, the cutting edge of 6 sword sheets, the end face of 7 sword sheets.
The specific embodiment
Example 1
Referring to accompanying drawing, centre sword sheet 2 and side sword sheet 3 are the stepped arrangement of in-line among the pricker body top as can be known, and the difference in height of central sword sheet and side sword sheet is h (for example, making h=5mm), and the indexs such as hardness of compensation block 4 are lower than the sword sheet certainly.During rock drilling, press water flows to working position, pricker body top by taper hole 8 toward a pair of limbers 5, and one cools off the sword sheet at pricker body top, and two are beneficial to the rock slag discharges.The bottom surface of central here sword sheet is a cambered surface, and the bottom surface of side sword sheet also is a cambered surface.
Example 2
The sword sheet arranging situation of bore bit and the course of work such as example 1 only are that used sword sheet bottom surface, pricker body top is the plane.
Claims (4)
1, a word ladder three sword bore bits contain the pricker body (1) of band taper hole (8), it is characterized in that: be provided with a central sword sheet (2) and a pair of side sword sheet (3) at the top of described pricker body (a 1) word ladder, the difference in height of the two is h, between central sword sheet (2) and side sword sheet, be situated between and be provided with compensation block (4), simultaneously, between described pricker body (1) outer wall and taper hole (8), tiltedly passed through a pair of limbers (5).
By the described bore bit of claim 1, it is characterized in that 2, its both ends of the surface width of described central sword sheet (2) equates that its bottom surface is plane or cambered surface.
By the described bore bit of claim 1, it is characterized in that 3, its both ends of the surface width of described side sword sheet (3) does not wait or equates that its bottom surface is the plane, cambered surface, the garden conical surface or wedge surface.
4, by the described bore bit of claim 1, it is characterized in that described central sword sheet (2) and side sword sheet (3) are carbide alloy sword sheet, and the difference in height h＜10mm of central sword sheet (2) and side sword sheet (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03227457 CN2622376Y (en) | 2003-04-22 | 2003-04-22 | Bull step shaped three-cutter drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03227457 CN2622376Y (en) | 2003-04-22 | 2003-04-22 | Bull step shaped three-cutter drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2622376Y true CN2622376Y (en) | 2004-06-30 |
Family
ID=34246871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03227457 Expired - Fee Related CN2622376Y (en) | 2003-04-22 | 2003-04-22 | Bull step shaped three-cutter drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2622376Y (en) |
-
2003
- 2003-04-22 CN CN 03227457 patent/CN2622376Y/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1422196A (en) | Drill with improved cutting insert formation | |
| CN2622376Y (en) | Bull step shaped three-cutter drill bit | |
| CN1434754A (en) | Drill bit | |
| CN112191893A (en) | Twist drill with positioning alloy tool bit | |
| CN202208064U (en) | Drilling and cutting tool | |
| CN2822839Y (en) | Composition type step drilling machine | |
| CN216828695U (en) | Hole machining tool | |
| CN202804280U (en) | Ladder structure dill bit | |
| CN206344312U (en) | Build work drill bit | |
| CN212823119U (en) | Stepped reamer | |
| CN203305323U (en) | Flat wing drill | |
| CN202655694U (en) | E2-type twist drill and straight fluted drill with cutting angle | |
| CN215238043U (en) | High-strength flat-bottom drill | |
| CN216656468U (en) | Stepping hole-opening drill bit | |
| CN205270958U (en) | Superhard composite drill bit and blade, drilling rod thereof | |
| CN216938580U (en) | Hollow drilling and reaming cutter | |
| CN218253051U (en) | Tungsten steel auger bit | |
| CN201997766U (en) | Central drill | |
| CN208380504U (en) | A kind of reaming bit | |
| CN213317896U (en) | Positive and negative chamfer burring drill bit | |
| CN217889606U (en) | Improved hollow drill bit | |
| CN217529347U (en) | Clamping quick installation type drilling and milling cutter | |
| CN104227151A (en) | Tapping knife | |
| CN216372614U (en) | Blind hole drill for wood processing | |
| CN214221093U (en) | Rock drilling cross opening bore bit |
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: 20040630 Termination date: 20100422 |