CN102151859B - Inner bore turning tool with special-section tool bar and supporting member thereof - Google Patents
Inner bore turning tool with special-section tool bar and supporting member thereof Download PDFInfo
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- CN102151859B CN102151859B CN 201110046344 CN201110046344A CN102151859B CN 102151859 B CN102151859 B CN 102151859B CN 201110046344 CN201110046344 CN 201110046344 CN 201110046344 A CN201110046344 A CN 201110046344A CN 102151859 B CN102151859 B CN 102151859B
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Abstract
The invention discloses an inner bore turning tool with a special-section tool bar and a supporting member thereof. The tool bar of the inner bore turning tool has higher rigidity than a round-section tool bar. The tuning tool comprises a tool head, a tool bar and a tool handle; if a hole with the minimum diameter into which the tool bar can extend is defined as a reference hole, the cross section of the tool bar is larger than pi(R-B/2)2, wherein R is the radius of the reference hole, and B is the extending length of the tool head. Under the condition that the size of the reference hole and the extending length of the tool head are same, the rigidity of the tool bar of the inner bore turning tool disclosed by the invention is higher than that of the tool bar of the traditional inner bore turning tool, the processing quality is better guaranteed, and simultaneously the application range of the inner bore turning technique is expanded, for example, turning processing can be applied to certain threads which can be processed only with a screw tap before. By the supporting member provided by the invention, the rigidity of the tool bar can be further improved and the quantity of the prepared tools can be reduced.
Description
Technical field
Employed lathe tool when the application relates to a kind of processing endoporus is specifically related to the knife bar of this lathe tool.The application also relates to a kind of when using this lathe tool, and the knife bar of lathe tool is implemented to support to improve the supporting member of its rigidity.
Background technology
Traditional internal lathe-tool consists of by cutter head, knife bar and handle of a knife.Cutter head or be installed in the head of knife bar by securing member, or be structure as a whole with knife bar; Handle of a knife then is positioned at the afterbody of knife bar, as the retaining part of lathe.At present, the knife bar of internal lathe-tool all is designed to the shape that is easy to process, and namely the cross section of knife bar is circular or square.The main way that guarantees arbor stiffness is exactly the width that increases knife bar.And the knife bar width of internal lathe-tool is subject to strict restriction.Turning inner hole is when (comprising internal thread hole), knife bar must be stretched in the hole of workpiece and process, so the width maximum of knife bar also can only equal diameter of bore and deducts necessary cutter head extension elongation and withdrawing burr and chip clearance.If the rigidity of knife bar can't meet the demands, add and will produce the phenomenons such as bending, vibration, cutter relieving man-hour, cause production efficiency low, the problem such as crudy is poor.Therefore, must consider to improve the way of internal lathe-tool arbor stiffness.
Now the rigidity of circular cross-section knife bar and square-section knife bar compared.Because knife bar stretches in the hole during cutting, if the hole of the diameter minimum that knife bar can be stretched into is defined as datum hole, when the cross section of knife bar is designed to square, as shown in Figure 4, the figure that the cross section of this cross section 3a and cutter head 2 consists of will in be connected to datum hole 10; At this moment, the area of cross section 3a (this area also is that the cross section when knife bar is designed to the maximum area in the square situation) is (2R-B)
2/ 2, wherein, R represents the radius of datum hole, and B represents the cutter head extension elongation; In the situation that parameters R is identical with B parameter, if the cross section of knife bar is circular, as shown in Figure 5, this moment, this cross section 3b area then was π (R-B/2)
2Draw by contrast, the area of cross section 3b is greater than the area of cross section 3a.Therefore, in the extension elongation of the size of datum hole, cutter head all under the identical condition, because the cross-sectional area of circular cross-section knife bar is larger than the cross-sectional area of square-section knife bar, therefore the rigidity of circular cross-section knife bar is relatively high.
Summary of the invention
The application aims to provide a kind of internal lathe-tool that has the knife bar of higher rigidity than the circular cross-section knife bar.
To this, the application has proposed a kind of internal lathe-tool with odd-shaped cross section knife bar, and this lathe tool comprises cutter head, knife bar and handle of a knife, is datum hole if define the hole of the diameter minimum that this knife bar can stretch into, and then the cross-sectional area of described knife bar is greater than π (R-B/2)
2Wherein, R represents the radius of datum hole, and B represents the cutter head extension elongation.
" odd-shaped cross section " of the application's indication comprises that except existing circular cross-section and square-section, all satisfy the cross sectional shape of above-mentioned condition.The application thinks like this: under the identical condition of radius R, the cutter head extension elongation B of datum hole, as long as the cross-sectional area of knife bar is greater than π (R-B/2)
2, illustrate that then the cross-sectional area of this knife bar is larger than the cross-sectional area of circular cross-section knife bar, thus knife bar rigidity also just higher.In the application's the specific embodiment, will provide the technique scheme that a plurality of embodiment support that the application proposes.
In these embodiments, consider the convenience of knife bar processing, the preferred mode of the application is: the cross section of described knife bar is for oval, and described cutter head is positioned on this oval short-axis direction.On this basis, the knife bar size preferably meets the following conditions: H=φ-2A, D=φ-2A-B; Wherein, H represents the knife bar Breadth Maximum, and D represents the knife bar minimum widith, and φ represents diameter of bore (during the machining internal thread hole, φ represents the path of internal thread hole), and A represents one-sided withdrawing burr and chip clearance, and B represents the cutter head extension elongation.Condition like this, the area of knife bar cross section will be area maximum in all possible elliptic cross-section, therefore rigidity is also just the highest.
The cross section of knife bar is designed to oval benefit also to be: cutter head is arranged on this oval short-axis direction, and when cutting knife bar bear the direction of main cutting force on the long axis direction of ellipse, therefore, the knife bar cross-sectional area mainly is increased in and bears the main cutting force direction, can significantly improve the cutter rigidity.
Consider equally the convenience of knife bar processing, the application also preferably mode be: the cross section of described knife bar is by the circular arc of angle of bend 〉=180 ° and connects the closed figure that the straight line of this circular arc initiating terminal and clearing end consists of; Described cutter head is positioned at this straight line one side.On this basis, the knife bar size preferably meets the following conditions: H=2R, D=2R-B; Wherein, H represents the knife bar Breadth Maximum, and D represents the knife bar minimum widith, and R represents the radius of datum hole, and B represents the cutter head extension elongation.Condition like this, the area of knife bar cross section will be area maximum in all possible such cross section, therefore rigidity is also just the highest.
The cutter head of the application's internal lathe-tool can be installed in the head of knife bar by securing member, in order to change.Such as, can at the head processing one axial screw of described knife bar and the radial hole that communicates with this axial screw, described cutter head be clamped in the radial hole by the trip bolt that cooperates with this axial screw.The cutter head of the application's internal lathe-tool also can be structure as a whole with knife bar.
It is a kind of when using this lathe tool that the application also will provide, and the knife bar of lathe tool is implemented to support to improve the supporting member of its rigidity.
For this reason, this supporting member comprises a support component that can be clamped on the lathe saddle, but is provided with the device of clamping knife bar on this support component.Concrete, have groove on the described support component and communicate with this groove and with the perpendicular screw of the bearing of trend of this groove, the trip bolt that cooperates with described screw is clamped to knife bar on this groove.Certainly, support component also can be by other various ways clamping knife bar, such as using circle holding etc.
Use the benefit of supporting member to be, because supporting member has increased the supporting role to knife bar, therefore the length of knife bar can increase accordingly, need only the extension elongation of suitably selecting knife bar during use, just can satisfy the processing request of the different endoporus of the degree of depth, therefore just can reduce the quantity of preparation cutter.
The application's beneficial effect is: in the extension elongation of the size of datum hole, cutter head all under the identical condition, the knife bar rigidity of the application's lathe tool is higher than the knife bar rigidity of traditional internal lathe-tool, better guaranteed crudy, enlarged simultaneously the scope of application of endoporus turning process, such as making the screw thread that needs screw tap to process before some realize turning processing.The application says that the supporting member that provides can further improve knife bar rigidity, reduces the quantity of preparation cutter.
Description of drawings
Fig. 1 is the application's internal lathe-tool and the annexation schematic diagram of its supporting member.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is the schematic diagram of the application's of being structure as a whole of cutter head and knife bar internal lathe-tool structure.
Fig. 4 uses state diagram for the internal lathe-tool of existing square sectional knife bar.
Fig. 5 uses state diagram for the internal lathe-tool of existing circular cross-section knife bar.
Fig. 6 is the use state diagram of the application's odd-shaped cross section knife bar embodiment 1 (oval cross section).
Fig. 7 is the use state diagram of the application's odd-shaped cross section knife bar embodiment 2.
Fig. 8 is the comparison diagram of knife bar cross-sectional area among Fig. 4, Fig. 5 and Fig. 7.
Fig. 9 is the use state diagram of the application's odd-shaped cross section knife bar embodiment 3.
Figure 10 is the comparison diagram of knife bar cross-sectional area among Fig. 4, Fig. 5 and Fig. 9.
Fig. 4～Figure 10 is along hole to be processed or the orthographic drawing of lathe tool axis direction.
The specific embodiment
Below in conjunction with drawings and Examples the application is described further.
Such as Fig. 1, Fig. 2 and shown in Figure 3, cutter head 2 or be installed in the head of knife bar 3 by securing member, or be structure as a whole with the head of knife bar 3; Handle of a knife 5 should be designed to rectangle, so that clamping.With cutter head 2 by securing member be installed in knife bar 3 head can so that tool setting 2 change.In Fig. 1 and Fig. 2, the radial hole 12 that the head of knife bar 3 is processed with an axial screw 7 and communicates with this axial screw 7, cutter head 2 is clamped in the radial hole 12 by the trip bolt 1 that cooperates with this axial screw 7.This structure does not take any chip removal space, and easy to process, can guarantee the chucking power to cutter head 2.
As depicted in figs. 1 and 2, when the length of knife bar 3 is longer, should consider to use supporting member.Support component 4 should be clamped on the lathe saddle, during use, both clamps handle of a knife 5 by lathe saddle, implements to support fixing by 4 pairs of knife bars of support component 3 again simultaneously.Wherein, support component 4 is that a cross section is the strip structure of rectangle, have groove 13 near the position of its end and communicate with this groove 13 and with the perpendicular screw 8 of the bearing of trend of this groove 13, the trip bolt 6 that cooperates with described screw 8 is for knife bar 3 is clamped to this groove 13.According to the degree of depth in hole to be processed, the extension elongation of knife bar 3 on groove 13 can be adjusted accordingly.
Such as Fig. 4, Fig. 5, Fig. 6, Fig. 7 and Fig. 9, knife bar must stretch in the endoporus 9 during cutting, if the hole of the diameter minimum that knife bar can be stretched into is defined as datum hole 10, in any case then, datum hole 10 all will be external in the cross section of knife bar and the figure that the cutter head cross section consists of.And the minimum diameter of the endoporus 9 that lathe tool can be processed, the diameter that also should equal datum hole 10 adds necessary withdrawing burr and chip clearance.
When the diameter phi of the extension elongation B of the radius R of datum hole 10 shown in Fig. 4, Fig. 5, Fig. 6, Fig. 7 and Fig. 9, cutter head 2 and endoporus 9 all in the identical situation, for situation shown in Figure 4, because the cross section 3a of knife bar is square, can obtain 2R=B+D (D is the catercorner length of cross section 3a) herein, according to the area formula D of cross section 3a
2/ 4, the area that can further calculate cross section 3a is (2R-B)
2/ 2; For situation shown in Figure 5, because the cross section 3b of knife bar is circular, can obtain 2R=B+D (D is the diameter of cross section 3b) herein, according to the area formula π D of cross section 3b
2/ 4, the area that can further calculate cross section 3a is π (R-B/2)
2By comparing the big or small of cross section 3a and cross section 3b or directly with reference to figure 8 and Figure 10, can drawing the area of cross section 3b greater than the area of cross section 3a.
Under the identical condition of radius R, the cutter head extension elongation B of datum hole, as long as the cross-sectional area of knife bar is greater than π (R-B/2)
2, illustrate that then the cross-sectional area of this knife bar 3 is larger than the cross-sectional area of circular cross-section knife bar, thus knife bar rigidity also just higher.
Embodiment 1
As shown in Figure 6, the cross section 3c of knife bar 3 is oval, and described cutter head 2 is positioned on this oval short-axis direction.On this basis, knife bar 3 sizes preferably meet the following conditions: H=φ-2A, D=φ-2A-B; Wherein, H represents knife bar 3 Breadth Maximums, and D represents knife bar 3 minimum widiths, and φ represents the diameter (during the machining internal thread hole, φ represents the path of internal thread hole) of endoporus 9, and A represents one-sided withdrawing burr and chip clearance, and B represents cutter head 2 extension elongations.Condition like this, the area of cross section 3c is π HD/4, and the area of cross section 3b is π D
2/ 4, because H is greater than D, so the area of cross section 3c is greater than the area of cross section 3b.The cross section of knife bar 3 is designed to oval benefit also to be: cutter head 2 is arranged on this oval short-axis direction, and when cutting knife bar 3 bear the direction of main cutting force on the long axis direction of ellipse, therefore, knife bar 3 cross-sectional areas mainly are increased in and bear the main cutting force direction, can significantly improve the cutter rigidity.When the cross section 3c of knife bar 3 was ellipse, the knife bar of this oval cross section can directly in the method machined moulding of engine lathe by the car ellipse, therefore be processed convenience very.
As shown in Figure 7, the cross section 3d of knife bar 3 is greater than 180 ° circular arc and connect the closed figure that the straight line of this circular arc initiating terminal and clearing end consists of by an angle of bend; Described cutter head 2 is positioned at this straight line one side.On this basis, knife bar 3 sizes meet the following conditions: H=2R, D=2R-B; Wherein, H represents knife bar 3 Breadth Maximums, and D represents knife bar 3 minimum widiths, and R represents the radius of datum hole 10, and B represents cutter head 2 extension elongations.Condition like this, as shown in Figure 8, the area of cross section 3d will be area maximum in all possible such cross section, therefore rigidity is also just the highest.The knife bar in such cross section can carry out the conventional machine add mode moulding such as grinding or milling again after the engine lathe system of getting on the bus, have advantages of equally easy to process.
As shown in Figure 9, the cross section 3e of knife bar 3 is irregular flats, and its periphery is close to the edge of datum hole 10 all the time.According to as shown in figure 10, the area of cross section 3e is equally greater than the area of cross section 3b, so the rigidity of knife bar 3 is still greater than the circular cross-section knife bar.But, because the shape matching of this cross section 3e is complicated, therefore be not easy processing.
Claims (4)
1. the internal lathe-tool that has the odd-shaped cross section knife bar, comprise cutter head (2), knife bar (3) and handle of a knife (5), the hole of the diameter minimum that this knife bar (3) can stretch into is referred to as datum hole (10), the center of this datum hole (10) is the pivot of knife bar (3), it is characterized in that: the cross-sectional area of described knife bar (3) is greater than π (R-B/2)
2Wherein, R represents the radius of datum hole, and B represents the cutter head extension elongation; The cross section (3c) of described knife bar (3) is oval, and described cutter head (2) is positioned on this oval short-axis direction; Knife bar (3) size meets the following conditions: H=φ-2A, D=φ-2A-B; Wherein, H represents the knife bar Breadth Maximum, and D represents the knife bar minimum widith, and φ represents diameter of bore, and A represents one-sided withdrawing burr and chip clearance, and B represents the cutter head extension elongation.
2. the internal lathe-tool that has the odd-shaped cross section knife bar, comprise cutter head (2), knife bar (3) and handle of a knife (5), the hole of the diameter minimum that this knife bar (3) can stretch into is referred to as datum hole (10), the center of this datum hole (10) is the pivot of knife bar (3), it is characterized in that: the cross-sectional area of described knife bar (3) is greater than π (R-B/2)
2Wherein, R represents the radius of datum hole, and B represents the cutter head extension elongation; The cross section (3d) of described knife bar (3) is by the circular arc of angle of bend 〉=180 ° and connects the closed figure that the straight line of this circular arc initiating terminal and clearing end consists of; Described cutter head (2) is positioned at this straight line one side; Knife bar (3) size meets the following conditions: H=2R, D=2R-B; Wherein, H represents the knife bar Breadth Maximum, and D represents the knife bar minimum widith, and R represents the radius of datum hole, and B represents the cutter head extension elongation.
3. the internal lathe-tool with odd-shaped cross section knife bar as claimed in claim 1 or 2, it is characterized in that: the radial hole (12) that the head of described knife bar (3) is processed with an axial screw (7) and communicates with this axial screw (7), described cutter head (2) is clamped in the radial hole (12) by the trip bolt (1) that cooperates with this axial screw (7).
4. the internal lathe-tool with odd-shaped cross section knife bar as claimed in claim 1 or 2 is characterized in that: described cutter head (2) is structure as a whole with knife bar (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110046344 CN102151859B (en) | 2011-02-25 | 2011-02-25 | Inner bore turning tool with special-section tool bar and supporting member thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110046344 CN102151859B (en) | 2011-02-25 | 2011-02-25 | Inner bore turning tool with special-section tool bar and supporting member thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102151859A CN102151859A (en) | 2011-08-17 |
| CN102151859B true CN102151859B (en) | 2013-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110046344 Expired - Fee Related CN102151859B (en) | 2011-02-25 | 2011-02-25 | Inner bore turning tool with special-section tool bar and supporting member thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020011394A1 (en) * | 2019-02-26 | 2020-01-16 | Kimmich Hubert | Device for securing a boring bar |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103372662A (en) * | 2012-04-24 | 2013-10-30 | 昆山江锦机械有限公司 | Cutter bar with large length-diameter ratio |
| CN104690320A (en) * | 2015-04-02 | 2015-06-10 | 植健 | Novel rigid cutter bar |
| CN111774674B (en) * | 2020-08-03 | 2022-11-15 | 贵州航天精工制造有限公司 | Combined device for turning internal thread tool setting |
| CN112091249A (en) * | 2020-09-04 | 2020-12-18 | 松源机械制造有限公司 | Bottle blank injection molding model machining tool and model machining method thereof |
| CN114054815B (en) * | 2022-01-18 | 2022-05-10 | 成都飞机工业（集团）有限责任公司 | High-precision special-shaped hole machining method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201267943Y (en) * | 2008-09-05 | 2009-07-08 | 江西江铃底盘股份有限公司 | Auxiliary clamper of boring bar for general lathe general-purpose inner bore |
| CN201565617U (en) * | 2009-11-13 | 2010-09-01 | 广州柴油机厂 | Tool for scraping counterbores reversely on numerical control machine |
-
2011
- 2011-02-25 CN CN 201110046344 patent/CN102151859B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201267943Y (en) * | 2008-09-05 | 2009-07-08 | 江西江铃底盘股份有限公司 | Auxiliary clamper of boring bar for general lathe general-purpose inner bore |
| CN201565617U (en) * | 2009-11-13 | 2010-09-01 | 广州柴油机厂 | Tool for scraping counterbores reversely on numerical control machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020011394A1 (en) * | 2019-02-26 | 2020-01-16 | Kimmich Hubert | Device for securing a boring bar |
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| CN102151859A (en) | 2011-08-17 |
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