CN115156595A - Long-life ladder drill bit - Google Patents
Long-life ladder drill bit Download PDFInfo
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- CN115156595A CN115156595A CN202210566130.6A CN202210566130A CN115156595A CN 115156595 A CN115156595 A CN 115156595A CN 202210566130 A CN202210566130 A CN 202210566130A CN 115156595 A CN115156595 A CN 115156595A
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- 238000005553 drilling Methods 0.000 claims abstract description 13
- 238000003754 machining Methods 0.000 claims abstract description 5
- 230000002093 peripheral effect Effects 0.000 claims description 30
- 238000000034 method Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/009—Stepped drills
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- Mechanical Engineering (AREA)
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Abstract
The invention relates to a long-life stepped drill tool which is used for machining a stepped hole and comprises a tool handle, a front end drilling tool part, a first stepped tool part and a second stepped tool part, wherein the second stepped tool part is staggered with the first stepped tool part, the first stepped tool part is provided with a stepped tool tip, and the second stepped tool part is provided with an inclined neck surface; when the stepped drill bit rotates, the distance between the track circle of the stepped drill bit and the orthographic projection circle of the stepped drill bit on the inclined neck surface is equal to the length of a second-stage step of the stepped hole to be machined. The invention provides a long-life stepped drill bit, the regrinding times of the stepped drill bit are not influenced by the length of a step, repeated regrinding can be realized, and the use cost of the tool is greatly reduced.
Description
Technical Field
The invention relates to the field of twist drills, in particular to a long-life step drill tool.
Background
Twist drills are tools for drilling round holes in workpieces by rotary cutting relative to a fixed axis, and are known as twist drills because the chip flutes are helical. The traditional twist drill has two forms of a straight flute and a spiral flute, no matter which form of the tool, the front end of the tool comprises a front end cutting edge, one or more rear end cutting edges which are steps are arranged behind the front end cutting edge, and the extension lines of the rear end cutting edges and the front end cutting edges are arranged, the regrindable times and the service life of the step tool with the structure are determined by the step length, the regrindable times of the tool with the shorter step length are less, as shown in figure 4, the step drill is used for processing a step hole, and the second step hole of the step hole is 2.33mm, so that the length of the side edge 02 corresponding to the cutting edge 01 is 2.33mm, only the side edge of 2.33mm determines that the tool is difficult to regrindate, and most of the tool can only regrindly be regrindly done once, thereby causing the use cost of the step short tool to be high, the tool consumption is large, so that the product processing cost is high, and needs to be improved urgently.
Disclosure of Invention
In view of the above, the invention provides a long-life stepped drill, the regrinding frequency of which is not affected by the length of the steps, and the repeated regrinding can be realized, so that the use cost of the tool is greatly reduced.
The purpose of the invention is realized by the following technical scheme:
a long-life stepped drill tool is used for machining a stepped hole and comprises a tool handle, a front end drilling tool part, a first stepped tool part and a second stepped tool part, wherein the second stepped tool part is staggered with the first stepped tool part, the first stepped tool part is provided with a stepped tool tip, and the second stepped tool part is provided with an inclined neck surface; when the stepped drill bit rotates, the distance between the track circle of the tip of the stepped drill bit and the orthographic projection circle of the tip of the stepped drill bit on the inclined neck surface is equal to the length of a second-stage step of the stepped hole to be machined.
This ladder boring cutter is wrong sword structure, second ladder sword portion staggers with first ladder sword portion, its regrinding mode is obviously different with traditional ladder boring cutter, at first regrind the ladder knife tip of first ladder sword portion, then use the ladder knife tip as the benchmark, regrind the scarf of second ladder sword portion, the orbit circle of ensureing the ladder knife tip equals the second grade ladder length of waiting to process the shoulder hole rather than the distance of the orthographic projection circle of scarf, so its regrind number of times does not receive the influence of shoulder length, can realize many times regrind, greatly reduced cutter's use cost.
Optionally, in a possible implementation manner, the tool diameter of the first stepped tool part is larger than that of the front end drilling tool part.
The stepped hole has a first-stage step with a smaller aperture and a second-stage step with a larger aperture, the front-end drilling cutter portion is used for processing the first-stage step, and the second-stage step with the larger aperture is obtained by processing the first-stage cutter portion.
Optionally, in a possible implementation manner, the front end drilling cutter part includes a front end cutter point located at the foremost end, a front end side edge connected with the front end cutter point, and a front end peripheral edge connected with the front end cutter point and the front end side edge, and the front end peripheral edge is a tapered edge.
The front end tool nose is the most important cutting edge part of the front end drilling tool part, the area is the main force application part for processing a first-stage step, the first-stage step is obtained by processing the front end tool nose, when the stepped drill tool rotates, the track circle formed by the front end tool nose along with the rotating track of the stepped drill tool, and the aperture of the first-stage step is determined by the diameter of the track circle of the front end tool nose and is equal to the diameter of the track circle.
Optionally, in a possible implementation manner, the first step cutter portion includes a step surface connected to the front end peripheral edge, a step cutter point located at an edge of the step surface, a step side edge connected to the step cutter point, and a step peripheral edge connected to the step cutter point and the step side edge.
The step tool nose is the most important cutting edge part of the first step tool nose, the area is the main force application part for processing the second step, the second step is obtained by processing the step tool nose, when the step drill tool rotates, the track circle of the step tool nose rotating along with the step drill tool forms, and the aperture of the second step is determined by the diameter of the track circle of the step tool nose and is equal to the diameter of the track circle of the step tool nose.
Optionally, in a possible implementation manner, the first stepped cutter portion further includes a second stepped peripheral edge connected to the first stepped peripheral edge.
After the step tool nose is processed for a plurality of times, the cutting edge becomes blunt, at this time, the cutting edge needs to be reground, and during regrinding, the grinding is carried out from the old step tool nose to the direction of the second step peripheral edge, so that the sharp step tool nose cutting edge is obtained again. And after the step tool nose is reground, regrinding the inclined neck surface according to the position of a new step tool nose, and ensuring that the distance between the track circle of the step tool nose and the orthographic projection circle of the step tool nose on the inclined neck surface is equal to the length of a second-stage step of the step hole to be processed.
Optionally, in a possible implementation, the stepped peripheral edge extends to the shank, and the second stepped peripheral edge extends to the shank.
Because second ladder week sword extends to the handle of a knife always, so second ladder week sword has longer length, and the regrinding length of this cutter is very close with second ladder week sword's length, and to the shorter cutter of second grade ladder, the life-span promotion is very big, and this series of cutters will not receive the restriction of second grade ladder length, can realize regrinding many times, and life is promoted at double.
Optionally, in a possible implementation, the first stepped cutter portion and the second stepped cutter portion are separated by a small chip flute.
First ladder sword portion and second ladder sword portion are separated through the little chip groove, form wrong sword for the cutter does not receive the restriction of second grade ladder length, can realize many times regrinding, and life improves at double.
Optionally, in one possible implementation, the tapered neck surface extends to the shank.
The inclined neck surface can be processed towards the handle of the knife as required, the inclined neck surface plays a limiting role, the length of a second-level step is determined by the position of the inclined neck surface, the distance between a track circle of the step knife tip and an orthographic projection circle of the inclined neck surface is very important, the numerical value of the inclined neck surface is required to be accurate after each regrinding, and the length of the inclined neck surface is equal to the length of the second-level step of a step hole to be processed.
Optionally, in a possible implementation, the front end drilling cutter portion, the first stepped cutter portion and the second stepped cutter portion constitute a set of cutting sets, the number of the cutting sets is plural, and the plural cutting sets are spaced apart by the main chip flute.
A plurality of cutting external members evenly distributed to distribute into the heliciform, make the cutting atress more steady.
Optionally, in a possible implementation, the helical direction of the primary flutes is left-handed or right-handed.
The spiral distribution can be a left spiral or a right spiral, and can be selected according to actual needs.
Compared with the prior art, the invention has the beneficial effects that:
the step drill tool is of a staggered-edge structure, the second step tool part is staggered with the first step tool part, the regrinding mode of the step drill tool is obviously different from that of the traditional step drill tool, firstly, the step tool tip of the first step tool part is reground, then, the inclined neck surface of the second step tool part is reground by taking the step tool tip as a reference, the distance between the track circle of the step tool tip and the orthographic projection circle of the step tool tip on the inclined neck surface is ensured to be equal to the length of the second step of a step hole to be processed, the regrinding frequency is not influenced by the length of the step, multiple regrinding can be realized, and the use cost of the tool is greatly reduced.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a structural view of a long-life stepped drill according to an embodiment of the present invention.
FIG. 2 is a partial trajectory supplementary view of a state of a long-life stepped drill according to an embodiment of the present invention.
FIG. 3 is a side view of a long life stepped drill in accordance with an embodiment of the present invention.
Fig. 4 is a structural view of a prior art stepped drill.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures. In the description of the embodiments of the present application, it should be understood that the terms "upper", "lower", "vertical", "horizontal", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when products of the application are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are used merely for convenience of description and simplification of the description, and do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The technical solution in the present application will be described below with reference to the accompanying drawings.
The embodiment provides a long-life stepped drill tool which is used for machining a stepped hole and comprises a tool handle 1, a front end drilling tool part 2, a first stepped tool part 3 and a second stepped tool part 4, wherein the second stepped tool part 4 is staggered with the first stepped tool part 3, the first stepped tool part 3 is provided with a stepped tool tip 31, and the second stepped tool part 4 is provided with an inclined neck surface 41; when the stepped drill bit rotates, the distance between the track circle of the stepped tool nose 31 and the orthographic projection circle of the stepped tool nose on the inclined neck surface 41 is equal to the length of the second-level step of the stepped hole to be machined.
As shown in fig. 4, the stepped drill is used for machining a stepped hole, the second stepped hole of the stepped hole is 2.33mm, so the length of the side edge 02 corresponding to the cutting edge 01 is 2.33mm, only the side edge of 2.33mm determines that the tool is difficult to regrind, and regrind only once is possible at most, which results in high use cost of the stepped short tool and large tool consumption. The step drill of the embodiment is of a staggered-edge structure, the second step tool part 4 is staggered with the first step tool part 3, and the regrinding mode of the step drill is obviously different from that of the traditional step drill, firstly, the step tool nose 31 of the first step tool part 3 is reground, then, the inclined neck surface 41 of the second step tool part 4 is reground by taking the step tool nose 31 as a reference, so that the distance between the track circle of the step tool nose 31 and the orthographic projection circle of the track circle on the inclined neck surface 41 is equal to the length of the second-level step of the step hole to be machined, the regrinding times are not influenced by the length of the steps, multiple times of regrinding can be realized, and the use cost of the tool is greatly reduced.
In this embodiment, the cutting diameter of the first stepped cutter portion 3 is larger than the cutting diameter of the leading end drill portion 2.
The stepped hole has a first-stage step with a smaller aperture and a second-stage step with a larger aperture, the front end drilling cutter part 2 is used for processing the first-stage step, and the second-stage step with the larger aperture is obtained by processing the first-stage cutter part 3.
In the present embodiment, the distal drill portion 2 includes the distal edge 21 positioned at the forefront, the distal peripheral edge 23 contacting the distal edge 21 and the distal peripheral edge 22, and the distal peripheral edge 23 is a tapered edge.
The front end nose 21 is the most important cutting edge part of the front end drilling cutter part 2, the region is the main force application part for processing a first step, the first step is obtained by processing the front end nose 21, when the stepped drill rotates, the front end nose 21 forms a track circle along with the rotating track of the stepped drill, and the aperture of the first step is determined by the diameter of the track circle of the front end nose 21 and is equal to the diameter of the track circle.
In particular, in the present embodiment, the first stepped blade portion 3 includes a stepped surface 32 contacting the distal end peripheral edge 23, a stepped blade edge 31 positioned at an edge of the stepped surface 32, a stepped side edge 33 contacting the stepped blade edge 31, and a stepped peripheral edge 34 contacting the stepped blade edge 31 and the stepped side edge 33.
The step nose 31 is the most important cutting edge part of the first step nose 3, the region is the main force application part for processing the second step, the second step is processed by the step nose 31, when the step drill rotates, the track of the step nose 31 rotating along with the step drill forms a track circle, and the aperture of the second step is determined by the diameter of the track circle of the step nose 31 and is equal to the diameter.
In the present embodiment, the first stepped blade portion 3 further includes a second stepped peripheral edge 35 that is in contact with the first stepped peripheral edge 34.
After the step nose 31 is machined for many times, the cutting edge becomes dull, at this time, the cutting edge needs to be reground, and during regrinding, the old step nose 31 is ground towards the second step peripheral edge 35, so that the sharp cutting edge of the step nose 31 is obtained again. After the step nose 31 is reground, the inclined neck surface 41 is reground according to the position of a new step nose 31, and the distance between the track circle of the step nose 31 and the orthographic projection circle of the track circle on the inclined neck surface 41 is ensured to be equal to the length of a second-level step of the step hole to be processed.
Specifically, in the present embodiment, the stepped peripheral edge 34 extends to the shank 1, and the second stepped peripheral edge 35 extends to the shank 1.
Because the second step peripheral edge 35 extends to the cutter handle 1, the second step peripheral edge 35 has a longer length, the regrinding length of the cutter is very close to the length of the second step peripheral edge 35, the service life of the cutter is greatly prolonged, the cutter series is not limited by the length of the second step, repeated regrinding can be realized, and the service life of the cutter series is prolonged in multiples.
In the present embodiment, the first stepped blade portion 3 and the second stepped blade portion 4 are separated from each other by the small chip groove 5.
First ladder sword portion 3 and second ladder sword portion 4 separate through the little chip groove, form wrong sword for the cutter does not receive the restriction of second grade ladder length, can realize many times regrinding, and life improves at double.
In this embodiment, the inclined neck surface 41 extends to the holder 1.
The inclined neck surface 41 can be machined towards the tool holder 1 as required, the inclined neck surface 41 plays a limiting role, the length of a secondary step is determined by the position of the inclined neck surface 41, the distance between a track circle of the stepped tool nose 31 and an orthographic projection circle of the stepped tool nose on the inclined neck surface 41 is very important, each regrinding process needs to ensure the accuracy of the numerical value, and the length of the regrinding process is equal to the length of the secondary step of a stepped hole to be machined.
In the present embodiment, the leading end boring cutter portion 2, the first stepped cutter portion 3, and the second stepped cutter portion 4 constitute a set of a plurality of cutting sets, and the plurality of cutting sets are spaced apart by the main chip flutes 6.
A plurality of cutting external members evenly distributed to distribute into the heliciform, make the cutting atress more steady.
In the present embodiment, the spiral direction of the main chip flute is a left spiral, but in other embodiments, the spiral direction may be a right spiral, and may be selected according to actual needs.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The long-life stepped drill tool is characterized by being used for machining a stepped hole and comprising a tool handle, a front end drilling tool part, a first stepped tool part and a second stepped tool part, wherein the second stepped tool part is staggered with the first stepped tool part, the first stepped tool part is provided with a stepped tool tip, and the second stepped tool part is provided with an inclined neck surface; when the stepped drill bit rotates, the distance between the track circle of the stepped drill bit and the orthographic projection circle of the stepped drill bit on the inclined neck surface is equal to the length of a second-stage step of the stepped hole to be machined.
2. The long life stepped drill insert of claim 1, wherein said first stepped insert portion has an insert diameter greater than that of the leading end drill insert portion.
3. The long life stepped drill according to claim 1, wherein the leading end drilling portion includes a leading end cutting edge located at the foremost end, a leading end side edge connected to the leading end cutting edge, and a leading end peripheral edge connected to the leading end cutting edge and the leading end side edge, and the leading end peripheral edge is a tapered edge.
4. The long-life stepped drill according to claim 3, wherein the first stepped portion includes a stepped surface connected to the front end peripheral edge, a stepped nose at an edge of the stepped surface, a stepped side edge connected to the stepped nose, and a stepped peripheral edge connected to the stepped nose and the stepped side edge.
5. The long life stepped drill insert of claim 4, wherein said first stepped insert portion further comprises a second stepped peripheral edge contiguous with said first stepped peripheral edge.
6. The long life stepped drill bit of claim 5, wherein said stepped peripheral edge extends to the shank and said second stepped peripheral edge extends to the shank.
7. The long life stepped drill insert of claim 1, wherein said first and second stepped insert portions are separated by small chip flutes.
8. The long life stepped drill bit of claim 1, wherein said tapered neck surface extends to a shank.
9. The long life stepped drill insert of claim 1, wherein said nose drill portion, first stepped cutter portion and second stepped cutter portion comprise a plurality of cutting sets, said plurality of cutting sets being spaced apart by a primary flute.
10. The long life stepped drill insert of claim 9, wherein said primary flutes are helically left or right handed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210566130.6A CN115156595A (en) | 2022-05-24 | 2022-05-24 | Long-life ladder drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210566130.6A CN115156595A (en) | 2022-05-24 | 2022-05-24 | Long-life ladder drill bit |
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| Publication Number | Publication Date |
|---|---|
| CN115156595A true CN115156595A (en) | 2022-10-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210566130.6A Pending CN115156595A (en) | 2022-05-24 | 2022-05-24 | Long-life ladder drill bit |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007007831A (en) * | 2005-07-04 | 2007-01-18 | Osg Corp | Stepped drill |
| CN106624080A (en) * | 2016-12-20 | 2017-05-10 | 大连理工大学 | Drilling and countersinking integrated drill bit with stepped micro teeth and double edge strips |
| CN209598276U (en) * | 2019-02-22 | 2019-11-08 | 上汽通用五菱汽车股份有限公司 | A kind of novel repeatable reconditioning molding brill |
| CN110480066A (en) * | 2019-09-17 | 2019-11-22 | 苏州阿诺精密切削技术有限公司 | A kind of variable diameter step drill |
| CN212144642U (en) * | 2020-03-25 | 2020-12-15 | 一汽奔腾轿车有限公司 | Stepped drill bit |
-
2022
- 2022-05-24 CN CN202210566130.6A patent/CN115156595A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007007831A (en) * | 2005-07-04 | 2007-01-18 | Osg Corp | Stepped drill |
| CN106624080A (en) * | 2016-12-20 | 2017-05-10 | 大连理工大学 | Drilling and countersinking integrated drill bit with stepped micro teeth and double edge strips |
| CN209598276U (en) * | 2019-02-22 | 2019-11-08 | 上汽通用五菱汽车股份有限公司 | A kind of novel repeatable reconditioning molding brill |
| CN110480066A (en) * | 2019-09-17 | 2019-11-22 | 苏州阿诺精密切削技术有限公司 | A kind of variable diameter step drill |
| CN212144642U (en) * | 2020-03-25 | 2020-12-15 | 一汽奔腾轿车有限公司 | Stepped drill bit |
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