CN107378075A - Inclined cutting hole saw - Google Patents
Inclined cutting hole saw Download PDFInfo
- Publication number
- CN107378075A CN107378075A CN201710760140.2A CN201710760140A CN107378075A CN 107378075 A CN107378075 A CN 107378075A CN 201710760140 A CN201710760140 A CN 201710760140A CN 107378075 A CN107378075 A CN 107378075A
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- CN
- China
- Prior art keywords
- sawtooth
- cutting edge
- cutting
- hole saw
- saw
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- 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.)
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Classifications
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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
- B23B51/04—Drills for trepanning
Abstract
The invention belongs to cutting tool technical field, and in particular to a kind of inclined cutting hole saw.The sawtooth cutting edge that the rake face that the hole saw is oriented to tooth, right sawtooth and left sawtooth is formed with rear knife face intersecting lens is angled straight lines, and incline direction is identical, and the rake face of the sawtooth is curve slope.The cutting edge for being different from prior art hole saw is horizontal linear, i.e. cutting edge inclination is 0 °, the cutting edge of the present invention is the inclined cutting of angled straight lines, and cutting edge inclination angle uses negative value, so as to change the outflow direction of chip, enable chip fast and effective along rake face is tilted to external chip discharging, improve chip removal efficiency, machined piece surface will not be scratched, improves piece surface crudy；It is at first point contact workpiece in working angles to make hole saw simultaneously, cutting edge is gradually permeated in workpiece, avoids skidding of the horizontal linear cutting edge in working angles, improve centering ability, improve stationarity during cutting, lower vibration during cutting, improve processing efficiency.
Description
Technical field
The invention belongs to cutting tool technical field, is related to the hole saw that circular port is processed in industry or engineering, and in particular to
A kind of inclined cutting hole saw.
Background technology
Hole saw is also referred to as hole making drill, and it is electronic installed in electric hand drill, impact drill etc. as a kind of practical aperture knife tool
On instrument or radial drill, it is widely used in perforate on metal or non-metal workpiece.At present, master of the existing hole saw in working angles
Want difficult point to be the exclusion how to effectively control chip, while realize quick, smoothly cutting, ensure the matter of as-machined workpiece surface
Amount.First, as the increase of cutting depth, chip can not smoothly be discharged, be easily accumulated in teeth groove, hole saw drilling speed is reduced
Degree, influences processing efficiency, while the chip easy damaged sawtooth gathered in teeth groove, reduces the service life of sawtooth；Secondly, hole saw is opened
When beginning to cut, cutting edge, which is not easy to cut in workpiece, easily occurs skidding, is easily vibrated in working angles, influences the matter of cutting
Amount；Then, because chip and drilled inwall are rubbed, the surface quality of drilled inwall will be influenceed, sees Figure of description
Middle Fig. 6 (b).Therefore, in order to improve chip removal problem of the hole saw in working angles, it is necessary to which prior art hole saw is changed
Enter.
The content of the invention
For above-mentioned existing hole saw problem present in working angles, cut the invention provides one kind in working angles
Bits can be discharged fast and effeciently, realize hole saw that is quick, steadily cutting.
The concrete technical scheme of the present invention is as follows：
Inclined cutting hole saw, including saw body, sawtooth and base, saw body lower end are connected with base, and saw body sidewall is provided with equal
The side-wall hole of even distribution, saw body upper end are provided with sawtooth, and the sawtooth is made up of multigroup sawtooth of cycle arrangement, every group of sawtooth bag
The right sawtooth on internal surface, the left sawtooth of deviation saw external surface are sawed containing deviation and are oriented to tooth, right sawtooth, left sawtooth and guiding tooth
It is staggered, it is characterised in that the rake face of the sawtooth is curve slope, described tooth, right sawtooth and the left sawtooth of being oriented to
The sawtooth cutting edge that rake face is formed with rear knife face intersecting lens is angled straight lines, and incline direction is identical.
The sawtooth cutting edge that the rake face of described sawtooth is formed with rear knife face intersecting lens is angled straight lines, and is tilted
Direction is identical, that is, is oriented to tooth, the inclined cutting edge inclination λ s scopes of the cutting edge of right sawtooth and left sawtooth are -20 ° to -8 °.
Described guiding tooth cutting edge peak, right sawtooth cutting edge peak and left sawtooth cutting edge peak height phase
Together.
The cutting edge peak to tilt chip area top edge depth capacity h sawtooth tooth depth is directly proportional corresponding thereto
Relation, depth capacity h are the 97%~103% of its corresponding sawtooth tooth depth.
The serrated slot curve slope top edge is 1.0mm~2.0mm with following intermarginal maximum grinding depth H scopes.
SaW pitch is proportional corresponding thereto by the polishing width F of the serrated slot curve slope lower edge, grinding
Width F is the 45%~65% of its corresponding SaW pitch.
Groove between adjacent saw-tooth is serrated slot, and the serrated slot outer surface is the inclination chip removal with curve slope
Groove.
The present invention operation principle be：In machining, cutting edge is not orthogonal to the cutting in cutting speed direction, is referred to as
For inclined cutting.During inclined cutting, due to cutting edge and cutting speed direction out of plumb, it is allowed to produce the speed along cutting edge direction
Component and the velocity component perpendicular to cutting edge direction are spent, because the presence of the velocity component in cutting edge direction makes cutting lay flat
Metal plastic flowing is produced on the direction of row cutting edge, causes the direction of cutting lay shearing slip to change, changes cutting
Direction is flowed out, makes the outflow direction of chip not in cutting edge Normal plane, but one is formed with cutting edge Normal plane
Angle, the outflow direction of chip is referred to as chip-flow angle with the angle of cutting edge normal on rake face.When cutting edge inclination is less than 45 °
When, rule of thumb formula chip-flow angle is approximately equal to cutting edge inclination, and the present invention changes chip flow outgoing direction by changing cutting edge inclination.
Cutting edge inclination can not only influence chip removal direction, and tool working angle can be had an impact,
During inclined cutting, the approximate formula of working orthogonal rake of tool is：
Sin γ e=sin Ψλsinλs+cosΨλcosλs sinγn
Wherein：γ e --- working rake angle；Ψλ--- chip-flow angle；λ s --- cutting edge inclination；γ n --- method anterior angle.
Rule of thumb formula chip-flow angle is approximately equal to cutting edge inclination, and now the approximate formula of working orthogonal rake of tool is writeable
For：Sin γ e=sin2λs+cos2λs sinγn
When method anterior angle is constant, the increase of cutting edge inclination absolute value increases the working rake angle of cutter, and working rake angle increases,
Main cutting force can effectively be reduced and improve processing efficiency, and cutting edge roundness arc radius value also correspondingly reduces, and is advantageous to
The incision of cutting edge, cutting deformation is reduced, therefore the plastic deformation influence for cutting lay underlying materials is smaller, has added workpiece
The surface roughness value on work surface decreases.In addition, because cutting edge inclination increases, make the increase of rake face inclined degree, be unfavorable for
Generation, growth and the presence of built-up edge, correspondingly also reduce the surface roughness value of machined surface.
Meanwhile when cutting edge inclination is 0 °, whole cutting edge cuts workpiece simultaneously, increases the impact load on cutting edge,
And cutting edge inclination angle of the present invention is not zero, it is at first point contact workpiece in working angles to make hole saw, cutting edge is gradually permeated
In workpiece, skidding of the horizontal linear cutting edge in working angles is avoided, improves centering ability, putting down when improving cutting
Stability, lower vibration during cutting.
Compared with the prior art, the invention has the advantages that：Be different from the guiding tooth of prior art hole saw, left sawtooth and
The cutting edge of right sawtooth is horizontal linear, i.e., cutting edge inclination is 0 °, and the cutting edge that the present invention is oriented to tooth, left sawtooth and right sawtooth is
The inclined cutting of angled straight lines, and cutting edge inclination angle uses negative value, absolute value is not zero, and changes chip-flow angle, is cut so as to change
The outflow direction of bits, enable chip fast and effective along rake face is tilted to external chip discharging, improve chip removal efficiency, improve processing effect
Rate.Simultaneously as cutting edge inclination increases, make the increase of rake face inclined degree, be unfavorable for the generation, growth and presence of built-up edge, phase
Also reduce the roughness of machined surface with answering, improve piece surface crudy.
Further, since inclined cutting, cutting edge inclination is not zero, and it is at first point contact workpiece in working angles to make hole saw, is made
Cutting edge is gradually permeated in workpiece, is avoided skidding of the horizontal linear cutting edge in working angles, is improved centering ability,
Improve stationarity during cutting, lower vibration during cutting.
In addition, serrated slot is changed to curve slope by arc flat structure, also more conducively chip fast and effeciently excludes.
Brief description of the drawings
Fig. 1 is the stereogram of the present invention；
Fig. 2 is the expanded view of present invention saw body；
Fig. 3 is Fig. 2 partial enlarged drawing；
Fig. 4 is the physical dimension schematic diagram of the chip area in Fig. 3；
Fig. 5 is Fig. 4 top view；
Fig. 6 be the hole inwall that invention and prior art hole saw process same material surface quality to according to
Piece, (a) are present invention cutting hole surface, and (b) is prior art hole saw hole surface.
In figure：1st, hole-saw base, 2, saw body, 3, serrated slot, 4, sawtooth, 41, be oriented to tooth, 42, right sawtooth, 43, left sawtooth,
5th, side-wall hole, 6, rear knife face, 7, rake face, 8, sawtooth cutting edge, 9, rake face curve slope, 10, saw body lower end, 11, saw
Body upper end.
Embodiment
Technical scheme is further described in detail with reference to example.
Embodiment 1
As depicted in figs. 1 and 2, a kind of inclined cutting hole saw, including base 1, saw body 2 and sawtooth 4, saw the lower end of body 2 and bottom
Seat 1 connects, and the saw side wall of body 2 is provided with equally distributed side-wall hole 5, and saw body upper end 11 is provided with sawtooth 4, and the sawtooth 4 is by following
The multiple sets of teeth sawtooth composition of circle permutation, every group of sawtooth include deviation and saw the right sawtooth 42 on internal surface, are inclined to saw external surface
Left sawtooth 43 and guiding tooth 41, right sawtooth 42, left sawtooth 43 and guiding tooth 41 are staggered.
As shown in figure 3, the saw that the rake face 7 for being oriented to tooth 41, right sawtooth 42 and left sawtooth 43 is formed with the rear intersecting lens of knife face 6
Tooth cutting edge 8 is angled straight lines, and incline direction is identical, and the rake face 7 of the sawtooth is curve slope, adjacent saw-tooth it
Between groove be serrated slot 3, the outer surface of serrated slot 3 is the inclination chip area with curve slope；The sword of sawtooth cutting edge 8 inclines
Angle λ s scopes are -20 ° to -8 °；The peak of 41 cutting edge of tooth 8, the peak of 42 cutting edge of right sawtooth 8 and left sawtooth 43 is oriented to cut
The peak of sword 8 is highly identical.
As shown in figure 4, depth capacity h corresponding thereto sawtooth tooth of the peak of cutting edge 8 to the top edge of serrated slot 3
Plutonic proportional relation, depth capacity h are the 97%~103% of its corresponding sawtooth tooth depth；The serrated slot curve slope top
Edge is 1.0mm~2.0mm with following intermarginal maximum grinding depth H scopes；The grinding of the serrated slot curve slope lower edge
SaW pitch is proportional corresponding thereto by width F, and polishing width F is the 45%~65% of its corresponding SaW pitch.
Below contrast test, wherein hole saw B are carried out using the hole saw A of the embodiment of the present invention 1, hole saw B and prior art hole saw C
On the basis of prior art hole saw, it is curve slope only to change serrated slot, and cutting edge and rake face do not change.
The hole saw A of the embodiment of the present invention 1, the hole saw B and prior art hole saw C The concrete specifications size of progress contrast test are such as
Under：
Test one：Velocity contrast tests
Test tool：The hole saw A of the embodiment of the present invention 1, hole saw B and prior art hole saw.
Test condition is as follows：
| Hole saw diameter： | 44mm |
| Experiment examination base： | Q235 plate sizes：170*150*6mm hardness：≤156HB |
| Cutting fluid： | Water-emulsifiable liquid |
| The speed of mainshaft： | 300RPM |
| Load： | 8.3kg |
| Test equipment： | Upright drill |
| Stop examination to require： | Stop trying in 5 holes |
Test result is as follows：
Test two：Life span comparison tests
Test tool：The hole saw A of the embodiment of the present invention 1 and prior art hole saw C.
Test condition is as follows：
| Hole saw diameter： | 44mm |
| Experiment examination base： | SUS304 plate sizes：170*150*6mm hardness：≤187HB |
| Cutting fluid： | Water-emulsifiable liquid |
| The speed of mainshaft： | 300RPM |
| Load： | 12.6kg |
| Test equipment： | Upright drill |
| Stop examination to require： | Hole saw fails：Broken teeth, sawtooth heavy wear |
Test result is as follows：
Test result：Being tested by velocity contrast, hole saw A of the present invention reduces 26.9% with respect to hole saw B process times,
Hole saw A reduces 54.5% with respect to hole saw C process times；Understand that hole saw A of the present invention is with respect to hole saw by using life span comparison's test
The C life-spans improve 13%.As shown in fig. 6, hole saw of the present invention processes the table of the cutting hole inwall of same material with prior art hole saw
Face quality versus, the surface quality of hole saw hole of the present invention inwall are substantially better than the surface of prior art hole saw hole inwall
Quality.
Hole saw of the present invention makes chip fast and effeciently to be discharged in working angles, carried on the premise of the life-span is ensured
High chip removal efficiency, realize quick, steady cutting.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (7)
1. inclined cutting hole saw, including saw body, sawtooth and base, saw body lower end are connected with base, saw body sidewall is provided with uniform
The side-wall hole of distribution, saw body upper end are provided with sawtooth, and the sawtooth is made up of multigroup sawtooth of cycle arrangement, and every group of sawtooth includes
Deviation saws the left sawtooth and guiding tooth of the right sawtooth on internal surface, deviation saw external surface, and right sawtooth, left sawtooth and guiding tooth are handed over
Mistake arrangement, it is characterised in that the rake face of the sawtooth is curve slope, before described guiding tooth, right sawtooth and left sawtooth
The sawtooth cutting edge that knife face is formed with rear knife face intersecting lens is angled straight lines, and incline direction is identical.
2. inclined cutting hole saw according to claim 1, it is characterised in that described guiding tooth, right sawtooth and left sawtooth
The sawtooth cutting edge that is formed of rake face and rear knife face intersecting lens be angled straight lines, and incline direction is identical, that is, be oriented to tooth,
The inclined cutting edge inclination λ s scopes of the cutting edge of right sawtooth and left sawtooth are -20 ° to -8 °.
3. inclined cutting hole saw according to claim 1, it is characterised in that described guiding tooth cutting edge peak, the right side
Sawtooth cutting edge peak and left sawtooth cutting edge peak are highly identical.
4. inclined cutting hole saw according to claim 3, it is characterised in that the cutting edge peak to inclination chip area
Sawtooth tooth depth is proportional corresponding thereto by the depth capacity h of top edge, and depth capacity h is its corresponding sawtooth tooth depth
97%~103%.
5. inclined cutting hole saw according to claim 1, it is characterised in that the serrated slot curve slope top edge is with
Maximum grinding depth H scopes between edge are 1.0mm~2.0mm.
6. inclined cutting hole saw according to claim 1, it is characterised in that the mill of the serrated slot curve slope lower edge
Cutting width F, SaW pitch is proportional corresponding thereto, and polishing width F is the 45%~65% of its corresponding SaW pitch.
7. inclined cutting hole saw according to claim 1, it is characterised in that the serrated slot outer surface between adjacent saw-tooth is
Inclination chip area with curve slope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710760140.2A CN107378075A (en) | 2017-08-29 | 2017-08-29 | Inclined cutting hole saw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710760140.2A CN107378075A (en) | 2017-08-29 | 2017-08-29 | Inclined cutting hole saw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107378075A true CN107378075A (en) | 2017-11-24 |
Family
ID=60346343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710760140.2A Pending CN107378075A (en) | 2017-08-29 | 2017-08-29 | Inclined cutting hole saw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107378075A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108098026A (en) * | 2018-01-10 | 2018-06-01 | 广东凯西欧照明有限公司 | A kind of hole making drill for being used to open sink hole |
| CN109227822A (en) * | 2018-10-19 | 2019-01-18 | 大连金河精密工具有限公司 | Monolithic cylinder knife |
| CN110202188A (en) * | 2019-07-15 | 2019-09-06 | 扬州昇业机械有限公司 | A kind of multi-functional superhard alloy hole saw |
| CN114728349A (en) * | 2019-11-14 | 2022-07-08 | 米沃奇电动工具公司 | Hole saw with large carbide overhang |
| CN114770771A (en) * | 2022-05-23 | 2022-07-22 | 乐清大勇新工具有限公司 | Hole digger and processing technology thereof |
-
2017
- 2017-08-29 CN CN201710760140.2A patent/CN107378075A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108098026A (en) * | 2018-01-10 | 2018-06-01 | 广东凯西欧照明有限公司 | A kind of hole making drill for being used to open sink hole |
| CN109227822A (en) * | 2018-10-19 | 2019-01-18 | 大连金河精密工具有限公司 | Monolithic cylinder knife |
| CN110202188A (en) * | 2019-07-15 | 2019-09-06 | 扬州昇业机械有限公司 | A kind of multi-functional superhard alloy hole saw |
| CN114728349A (en) * | 2019-11-14 | 2022-07-08 | 米沃奇电动工具公司 | Hole saw with large carbide overhang |
| CN114770771A (en) * | 2022-05-23 | 2022-07-22 | 乐清大勇新工具有限公司 | Hole digger and processing technology thereof |
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