CN113118486B - Rough and fine boring cutter - Google Patents
Rough and fine boring cutter Download PDFInfo
- Publication number
- CN113118486B CN113118486B CN202110445267.1A CN202110445267A CN113118486B CN 113118486 B CN113118486 B CN 113118486B CN 202110445267 A CN202110445267 A CN 202110445267A CN 113118486 B CN113118486 B CN 113118486B
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- bearing
- cutter body
- rough
- cutter
- push rod
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/10—Cutting tools with special provision for cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
- B23B29/03—Boring heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
- B23B29/03—Boring heads
- B23B29/034—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings
- B23B29/03432—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings radially adjustable during manufacturing
- B23B29/03467—Boring heads with tools moving radially, e.g. for making chamfers or undercuttings radially adjustable during manufacturing by means of gears and racks
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling And Boring (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
Abstract
The invention discloses a rough and fine boring cutter, which comprises: the cutter body is internally provided with a cooling liquid cavity communicated with the cooling liquid injection pipe; a piston disposed within the coolant cavity; the cutter body sliding block is arranged in the cutter body, is provided with an accommodating groove and can slide along the axial direction of the cutter body; the connecting rod is arranged in the cutter body, one end of the connecting rod is hinged with the piston, a boss extending outwards is arranged on the connecting rod, and the boss is positioned in the accommodating groove; the gear is arranged in the cutter body through a gear shaft, and the gear shaft is positioned in the accommodating groove and hinged with the boss; the rack is meshed with the gear, and two ends of the rack are respectively connected with the rough boring cutter head and the fine boring cutter head; the first bearing is sleeved on the periphery of the front end of the cutter body, and a first bearing spring is arranged between the first bearing and the cutter body; the second bearing is sleeved on the periphery of the cutter body, and a second bearing spring is arranged between the second bearing and the cutter body; a push rod which is arranged in the cutter body and is arranged at the downstream of the connecting rod, and the push rod can slide along the axial direction of the cutter body; and the push rod spring is arranged between the inner end surface of the cutter body and the push rod in a leaning manner.
Description
Technical Field
The invention relates to a machining instrument, in particular to a machining tool.
Background
As is known, the cylinder block is one of the most complex parts of the engine structure, and the process difficulty of machining the balance shaft hole is the greatest in the process of machining the cylinder block hole system, and the machining difficulty is mainly represented by high machining precision and small surface roughness of the balance shaft hole.
At present, the balance shaft hole processing technology in the prior art generally adopts the following processes: boring a side balance shaft hole of the speed reducer, boring a side balance shaft hole of the chain wheel, and boring a middle hole of the balance shaft. In the actual processing process, because the length-diameter ratio of the holes is smaller when the balance shaft hole on the reducer side and the balance shaft hole on the sprocket wheel side are bored, the adopted cutter is also shorter, the rigidity is better, and the processing process is also more stable.
However, it should be noted that, in the prior art, when the middle hole of the balance shaft is machined, the length-diameter ratio of the structure for machining the middle-gear balance shaft hole is limited by the structure of the cylinder body, and at this time, the overhang of the tool is large and the rigidity is poor. Therefore, there is a great cutting vibration during machining, and the precision and surface roughness of the surface of the balance shaft hole of the middle gear are often out of tolerance.
In order to solve the above problems in the prior art, some researchers have performed related optimization designs, and have obtained the following improvements:
1. the shockproof boring cutter with the damping function is used.
2. And adjusting cutting parameters, and adopting a machining strategy of small feed and low rotating speed.
3. The optimized geometric angle of the cutter uses a large main deflection angle and a small cutter tip circular arc. By increasing the sharpness of the tool, the cutting resistance is reduced.
However, the three improved schemes still have certain defects, when the scheme 1 is adopted, the shockproof boring cutter with the damping function is used, the cutter cost is greatly increased, and the shockproof frequency has a certain range and has certain limitations. When the scheme 2 is adopted, the production efficiency can be seriously reduced, and the production takt can be prolonged. In the case of the above-mentioned embodiment 3, the durability of the tool is greatly reduced.
Therefore, in order to solve the above problems in the prior art, the present invention is directed to a rough and fine boring tool, which adopts an optimized structural design, and not only can improve the rigidity of the tool by using the machined two-side balancing shaft holes as supports, but also can realize the feeding of the tool and the extension of the tool bit by injecting a cooling liquid into the tool body and using a hydraulic pressure as a power source.
Disclosure of Invention
The invention aims to provide a rough and fine boring cutter which adopts an optimized structural design, can improve the rigidity of the cutter by using the processed balance shaft holes on two sides as supports, and can realize the feeding of the cutter and the extension of a cutter head by injecting cooling liquid into a cutter body and using hydraulic pressure as a power source.
The rough and fine boring cutter is simple in structure, convenient to maintain, high in reliability, convenient to use, remarkable in effect of improving the rigidity of the cutter, and very good in popularization prospect and application value.
In order to achieve the above object, the present invention provides a rough and fine boring tool, comprising:
the cutter body is internally provided with a cooling liquid cavity which is communicated with a cooling liquid injection pipe;
a piston disposed within the coolant cavity;
the cutter body sliding block is arranged in the cutter body and can slide along the axial direction of the cutter body, and an accommodating groove is formed in the cutter body sliding block;
the connecting rod is arranged in the cutter body, one end of the connecting rod is hinged with the piston, a boss extending outwards is arranged on the connecting rod, and the boss is positioned in the accommodating groove;
the gear is arranged in the cutter body through a gear shaft, and the gear shaft is positioned in the accommodating groove and is hinged with the boss of the connecting rod;
the rack is meshed with the gear, and two ends of the rack are respectively connected with a rough boring cutter head and a fine boring cutter head;
the first bearing is sleeved on the periphery of the front end of the cutter body, and a first bearing spring is arranged between the first bearing and the cutter body;
the second bearing is sleeved on the periphery of the cutter body, and a second bearing spring is arranged between the second bearing and the cutter body;
a push rod which is arranged in the cutter body and is arranged at the downstream of the connecting rod, and the push rod can slide along the axial direction of the cutter body;
the push rod spring is arranged between the inner end surface of the cutter body and the push rod in an abutting mode so as to apply axial elastic force to the push rod;
when cooling liquid is injected into the cooling liquid cavity through the cooling liquid injection pipe, the cooling liquid pressure pushes the piston to move in the axial direction towards the direction of the first bearing, and then the connecting rod is driven to drive the gear shaft to rotate in the first rotating direction, so that the rack is driven to linearly move in the first radial direction, and the rough boring cutter head is pushed out; when the pressure of the cooling liquid is removed, the axial elastic force of the push rod spring pushes the push rod to move towards the direction of the second bearing in the axial direction, and then the connecting rod is driven to drive the gear shaft to rotate in a second rotating direction opposite to the first rotating direction, so that the rack is driven to linearly move in a second radial direction opposite to the first radial direction, and the fine boring cutter head is pushed out.
Further, in the rough and fine boring tool, the first bearing is axially positioned on the tool body through a first bearing limiting clamp spring.
Further, in the rough and fine boring tool, the second bearing is axially positioned on the tool body through a second bearing limiting clamp spring.
Further, in the rough and fine boring tool of the present invention, the tool body has an adjustable throttle valve on a wall of the coolant cavity.
Further, in the rough and fine boring tool according to the present invention, a radial dimension of the first bearing is smaller than a radial dimension of the second bearing.
In the technical scheme of the invention, the first bearing with a slightly smaller radial dimension can be used for being matched with the small hole of the balance shaft of the engine cylinder block, and the second bearing with a slightly larger radial dimension can be used for being matched with the large hole of the balance shaft of the engine cylinder block.
Further, in the rough and fine boring cutter, the first bearing is used for being matched with the small hole of the balance shaft of the engine block, and the second bearing is used for being matched with the large hole of the balance shaft of the engine block.
Further, in the rough and fine boring tool according to the present invention, the first bearing includes a first bearing holder and a first bearing roller embedded in the first bearing holder.
Further, in the rough and fine boring tool according to the present invention, the second bearing includes a second bearing holder and a second bearing roller embedded in the second bearing holder.
Further, in the rough and fine boring tool of the present invention, the tool body is further sleeved with a chip-preventing sleeve, the chip-preventing sleeve is provided with an axially extending groove, and the rough boring tool bit and the fine boring tool bit can extend out of the groove.
In the technical scheme of the invention, the cutter body can be sleeved with the chip-preventing sleeve, the chip-preventing sleeve can play a role in protection, and the chip-preventing sleeve can protect the internal mechanism of the cutter body from chip pollution.
Compared with the prior art, the rough and fine boring cutter has the advantages and beneficial effects as follows:
the rough and fine boring cutter adopts an optimized structural design, can improve the rigidity of the cutter by using the processed balance shaft holes on two sides as supports, can realize the feeding of the cutter and the extension of a cutter head by injecting cooling liquid into the cutter body and using hydraulic pressure as a power source, and uses a spring as a power source for the retraction of the cutter.
The measuring device is simple in structure, convenient to maintain, high in reliability and convenient to use, has a remarkable effect of improving the rigidity of the cutter, and has very good popularization prospect and application value.
Drawings
Fig. 1 is a schematic structural diagram of a rough and fine boring tool according to an embodiment of the present invention from a view angle.
Fig. 2 schematically shows a structural diagram of the rough and fine boring tool according to an embodiment of the invention after the chip-preventing sleeve is hidden.
Fig. 3 shows a schematic structural diagram of a rough and fine boring tool according to an embodiment of the present invention, in which a tool body is partially broken.
FIG. 4 is a front view of a rough and fine boring tool according to an embodiment of the present invention.
Fig. 5 is a cross-sectional view a-a of the structure shown in fig. 4.
Fig. 6 schematically shows a structure diagram of the rough and fine boring cutter according to the invention in which the rough boring cutter head of the rack is extended under one embodiment.
Fig. 7 is a schematic diagram showing a structure that a rough and fine boring tool according to the present invention is extended from a fine boring tool bit of a rack in one embodiment.
FIG. 8 is a front view of a rough and fine boring tool according to an embodiment of the present invention from a further perspective.
Fig. 9 is a B-B cross-sectional view of the structure shown in fig. 8.
Detailed Description
The rough and fine boring tool according to the present invention will be further explained and illustrated with reference to the drawings and the specific embodiments, which, however, should not be construed to unduly limit the technical solution of the present invention.
Fig. 1 is a schematic structural diagram of a rough and fine boring tool according to an embodiment of the present invention from a view angle.
Fig. 2 schematically shows a structural diagram of the rough and fine boring tool according to an embodiment of the invention after the chip-preventing sleeve is hidden.
As shown in fig. 1 and 2, in the present embodiment, the rough and fine boring tool according to the present invention may include: a cutter body 1 and a chip-preventing sleeve 18. The chip-preventing sleeve may be provided with an axially extending groove (not shown), so that a rough boring cutter head 701 (shown in fig. 6) and a fine boring cutter head 702 (shown in fig. 7) on the rack 7 (shown in fig. 5) can extend out of the groove of the chip-preventing sleeve 18. The chip-proof sleeve 18 can play a role in protection, and can protect the internal mechanism of the cutter body from chip pollution.
In the present invention, a plurality of components are provided in the cutter body 1, and the cutter body 1 may be partially broken to obtain a schematic view shown in fig. 3 below in order to show the components in the cutter body 1 and analyze the structure of the rough and fine boring tool according to the present invention.
Fig. 3 shows a schematic structural diagram of a rough and fine boring tool according to an embodiment of the present invention, in which a tool body is partially broken.
As shown in fig. 3, in the present embodiment, the rough and fine boring tool according to the present invention may further include, in addition to the tool body 1: the device comprises a piston 2, a cutter body slide block 3, a connecting rod 4, a gear 5 (shown in figure 4), a gear shaft 6, a rack 7, a first bearing 8, a first bearing spring 9, a second bearing 10, a second bearing spring 11, a push rod 12 and a push rod spring 13.
In the present invention, the push rod 12 is provided in the cutter body 1 and downstream of the connecting rod 4, and the push rod 12 can slide along the axial direction of the cutter body 1; a push rod spring 13 can be abuttingly provided between the inner end surface of the cutter body 1 and the push rod 12 to apply an axial elastic force to the push rod 12.
As can be seen from fig. 1 and fig. 3, in the present embodiment, a cooling liquid cavity 101 is reserved in the cutter body 1 according to the present invention, the cooling liquid cavity 101 can be communicated with a cooling liquid injection pipe 14, and the cooling liquid can be injected into the cooling liquid cavity 101 through the cooling liquid injection pipe 14.
In addition, in the present embodiment, the tool body 1 of the rough and fine boring tool according to the present invention may further be provided with an adjustable throttle valve 102 on the wall of the coolant cavity 101, which may be used to adjust the flow rate of the coolant injected into the coolant cavity 101.
In the present embodiment, the piston 2, the cutter body slider 3, the connecting rod 4, the gear 5, and the gear shaft 6 are all provided in the cutter body 1 according to the present invention. The cutter body slider 3 can slide along the axial direction of the cutter body 1, and is provided with an accommodating groove 301.
Accordingly, in the present embodiment, the piston 2 can be hinged to one end of the connecting rod 4, the connecting rod 4 has a boss 401 extending outward, and the boss 401 can be disposed in the accommodating groove 301 formed in the cutter body slider 3.
FIG. 4 is a front view of a rough and fine boring tool according to an embodiment of the present invention.
As shown in fig. 4, referring to fig. 1 and fig. 3, in the present embodiment, the first bearing 8 of the present invention can be sleeved on the periphery of the front end of the cutter body 1, and the first bearing spring 9 can be disposed between the first bearing 8 and the cutter body 1. Accordingly, in the present embodiment, the second bearing 10 according to the present invention may also be sleeved on the outer periphery of the cutter body 1, and the second bearing spring 11 is also disposed between the second bearing 10 and the cutter body 1.
As further shown in fig. 4, in the present embodiment, the first bearing 8 sleeved on the front end periphery of the cutter body 1 can be axially positioned on the cutter body 1 by the first bearing limit snap spring 15. Accordingly, the second bearing 10 sleeved on the periphery of the cutter body 1 can be axially positioned on the cutter body 1 by the second bearing limit snap spring 16/17.
It should be noted that, in the present embodiment, it is preferable to design the radial dimension of the first bearing 8 of the present invention to be smaller than the radial dimension of the second bearing 10. The first bearing 8 with a slightly smaller radial size can be used for being matched with a small hole of a balance shaft of an engine cylinder block, the second bearing 10 with a slightly larger radial size can be used for being matched with a large hole of the balance shaft of the engine cylinder block, and the design can effectively widen the applicability of the rough and fine boring cutter.
Further, it should be noted that, in the present embodiment, the first bearing 8 according to the present invention may include a first bearing retainer and a first bearing roller (not shown) embedded in the first bearing retainer; the second bearing 10 may include a second bearing retainer and a second bearing roller (not shown) embedded in the second bearing retainer. Such bearing structures are known in the art and will not be described in detail here.
In the invention, a special supporting structure is formed by matching the first bearing retainer, the first bearing roller, the first bearing spring 9, the first bearing limit snap spring 15, the second bearing retainer, the second bearing roller, the second bearing spring 11 and the second bearing limit snap spring 16/17. When the rough and fine boring cutter is used for machining, the corresponding bearing can be extruded by the spring, so that the retainer of the corresponding bearing is extruded on the end surface of the hole to be machined, the bearing can be inserted into the internal structure of the balance shaft hole, and the rigidity of the cutter is improved.
Fig. 5 is a cross-sectional view a-a of the structure shown in fig. 4.
As shown in fig. 4 and 5, and as can be seen by referring to fig. 3, in the present embodiment, the rough and fine boring tool according to the present invention further includes: and a gear 5. The gear 5 can be arranged in the cutter body 1 through the gear shaft 6, and the gear shaft 6 in the cutter body 1 can be positioned in the accommodating groove 301 on the cutter body sliding block 3 and hinged with the boss 401 of the connecting rod 4.
In the present embodiment, the rack 7 is engaged with the gear 5, and the rough boring bit 701 and the fine boring bit 702 may be connected to both ends of the rack 7. The rack 7 engaged with the gear 5 can be controlled to move up and down in the radial direction by rotating the gear 5, so that the rough boring cutter head 701 or the fine boring cutter head 702 on the rack 7 is extended and the machining is performed in cooperation. Wherein, the rough boring cutter head 701 and the fine boring cutter head 702 can be detachably arranged on the rack 7 in a bolt connection manner, and the structural schematic diagram of the rough boring cutter head 701 or the fine boring cutter head 702 when extending can refer to the following fig. 6 and fig. 7.
Fig. 6 schematically shows a structure diagram of the rough and fine boring cutter according to the invention in which the rough boring cutter head of the rack is extended under one embodiment. Fig. 7 is a schematic diagram showing a structure that a rough and fine boring tool according to the present invention is extended from a fine boring tool bit of a rack in one embodiment.
It should be noted that, in the rough and fine boring tool of the present invention, the friction between the tool body sliding block 3 and the tool body 1 can be controlled to be greater than the friction generated by the gear 5 driving the rack 7 to move.
FIG. 8 is a front view of a rough and fine boring tool according to an embodiment of the present invention from a further perspective.
Fig. 9 is a B-B cross-sectional view of the structure shown in fig. 8.
In the invention, the rough and fine boring tool of the invention can realize the feeding of the tool and the extension of the rough boring tool bit 701 or the fine boring tool bit 702 by injecting cooling liquid into the cooling liquid cavity 101 of the tool body 1 and using hydraulic pressure as a power source.
As shown in fig. 8 and 9, and as can be seen by referring to fig. 3 and 5, in the present embodiment, when the rough and fine boring tool of the present invention is used for machining, the tool may be moved to the cylinder bore to be machined, and then the tool may be moved into the cylinder balance shaft hole. The first bearing retainer and the first bearing roller are inserted into the balance shaft small hole. The step surface of the first bearing retainer can be jointed with the step surface of the small hole of the cylinder balance shaft and extrude the first bearing spring 9. Accordingly, the second bearing retainer and the second bearing roller are inserted into the cylinder balance shaft large hole. The step surface of the second bearing retainer can be attached to the step surface of the large hole of the cylinder balance shaft and extrude the second bearing spring 11.
After the position of the rough and fine boring cutter is set, a main shaft of a mechanical device connected with the rough and fine boring cutter can be controlled to rotate to drive the rough and fine boring cutter to rotate, and after a certain rotating speed is reached, cooling liquid is injected into the cooling liquid cavity 101 through the cooling liquid injection pipe 14.
When cooling liquid is injected into the cooling liquid cavity 101 through the cooling liquid injection pipe 14, the cooling liquid pressure pushes the piston 2 to move in the axial direction towards the direction of the first bearing 8, and further drives the connecting rod 4 to drive the gear shaft 6 to rotate in the first rotating direction, and at the moment, the cutter body sliding block 3 can be forced to slide in the axial direction of the cutter body 1 towards the direction of the first bearing 8; accordingly, the gear shaft 6 rotates in the first rotation direction to enable the gear 5 to synchronously rotate in the first rotation direction, so as to drive the rack 7 to linearly move in the first radial direction, and further push out the rough boring cutter head 701 on the rack 7, and the rough boring cutter head 701 is utilized for machining.
When the pressure of the cooling liquid is removed, the axial elasticity of the push rod spring 13 pushes the push rod 12 to move towards the direction of the second bearing 10 in the axial direction, so as to drive the connecting rod 4 to drive the gear shaft 6 to rotate in a second rotating direction opposite to the first rotating direction, and at the moment, the cutter body sliding block 3 can be forced to slide towards the direction of the second bearing 10 along the axial direction of the cutter body 1; correspondingly, the gear shaft 6 rotates in the second rotation direction, so that the gear 5 synchronously rotates in the second rotation direction, and the rack 7 is driven to linearly move in a second radial direction opposite to the first radial direction, and then the fine boring tool bit 702 on the rack 7 is pushed out, and the fine boring tool bit 702 is used for machining.
After the rough and fine boring cutter is adopted to carry out machining and cutting, the rough and fine boring cutter stops rotating, and cooling liquid with small flow can be applied under the control of a program to reset the rack 7. The rough and fine boring cutter provided by the invention exits from the balance shaft hole, and the processing cycle is finished.
In conclusion, the rough and fine boring cutter can not only utilize the machined balance shaft holes on two sides as supports to improve the rigidity of the cutter, but also can realize the feeding of the cutter and the extension of the cutter head by injecting cooling liquid into the cutter body and utilizing hydraulic pressure as a power source. The measuring device is simple in structure, convenient to maintain, high in reliability and convenient to use, has a remarkable effect of improving the rigidity of the cutter, and has very good popularization prospect and application value.
It should be noted that the combination of the features in the present application is not limited to the combination described in the claims of the present application or the combination described in the embodiments, and all the features described in the present application may be freely combined or combined in any manner unless contradicted by each other.
It should also be noted that the above-mentioned embodiments are only specific embodiments of the present invention. It is apparent that the present invention is not limited to the above embodiments and similar changes or modifications can be easily made by those skilled in the art from the disclosure of the present invention and shall fall within the scope of the present invention.
Claims (9)
1. A rough and fine boring cutter, characterized by comprising:
the cutter body is internally provided with a cooling liquid cavity which is communicated with a cooling liquid injection pipe;
a piston provided in the cooling liquid cavity near a tail of the cutter body;
the cutter body sliding block is arranged in the cutter body and can slide along the axial direction of the cutter body, and an accommodating groove is formed in the cutter body sliding block;
the connecting rod is arranged in the cutter body, one end of the connecting rod is hinged with the piston, a boss extending outwards is arranged on the connecting rod, and the boss is positioned in the accommodating groove;
the gear is arranged in the cutter body through a gear shaft, and the gear shaft is positioned in the accommodating groove and is hinged with the boss of the connecting rod;
the rack is meshed with the gear, and two ends of the rack are respectively connected with a rough boring cutter head and a fine boring cutter head;
the first bearing is sleeved on the periphery of the front end of the cutter body, and a first bearing spring is arranged between the first bearing and the cutter body;
the second bearing is sleeved on the periphery of the middle part of the cutter body, and a second bearing spring is arranged between the second bearing and the cutter body;
a push rod which is arranged in the cutter body and is closer to the first bearing relative to the connecting rod, and the push rod can slide along the axial direction of the cutter body;
the push rod spring is arranged between the inner end surface of the cutter body and the push rod in an abutting mode so as to apply axial elastic force to the push rod;
the friction force between the cutter body sliding block and the cutter body is greater than the friction force of the gear driving the rack to move;
when cooling liquid is injected into the cooling liquid cavity through the cooling liquid injection pipe, the cooling liquid pressure pushes the piston to move in the axial direction towards the direction of the first bearing, and then the connecting rod drives the gear shaft to rotate in the first rotating direction so as to drive the rack to linearly move in the first radial direction to push out the rough boring cutter head, and at the moment, the connecting rod is abutted to the push rod and compresses the push rod spring; when the pressure of the cooling liquid is removed, the axial elastic force of the push rod spring pushes the push rod to move towards the direction of the second bearing in the axial direction, and then the connecting rod is driven to drive the gear shaft to rotate in a second rotating direction opposite to the first rotating direction, so that the rack is driven to linearly move in a second radial direction opposite to the first radial direction, and the fine boring cutter head is pushed out.
2. The rough and fine boring tool of claim 1, wherein the first bearing is axially positioned on the tool body by a first bearing retaining snap spring.
3. The rough and fine boring tool of claim 1, wherein the second bearing is axially positioned on the tool body by a second bearing retaining snap spring.
4. The rough and fine boring tool as recited in claim 1, wherein the tool body has an adjustable restrictor on a wall of the coolant cavity.
5. The rough-finish boring tool of claim 1, wherein a radial dimension of the first bearing is less than a radial dimension of the second bearing.
6. The rough and fine boring tool as recited in claim 5, wherein the first bearing is adapted to fit the engine block balance shaft small bore and the second bearing is adapted to fit the engine block balance shaft large bore.
7. The rough boring tool of claim 1, wherein the first bearing comprises a first bearing retainer and a first bearing roller embedded within the first bearing retainer.
8. The rough boring tool of claim 6, wherein the second bearing comprises a second bearing retainer and a second bearing roller embedded within the second bearing retainer.
9. The rough-finish boring cutter according to claim 6, wherein a chip-preventing sleeve is further sleeved outside the cutter body, an axially extending groove is formed in the chip-preventing sleeve, and the rough-boring cutter head and the finish-boring cutter head can extend out of the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110445267.1A CN113118486B (en) | 2021-04-25 | 2021-04-25 | Rough and fine boring cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110445267.1A CN113118486B (en) | 2021-04-25 | 2021-04-25 | Rough and fine boring cutter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113118486A CN113118486A (en) | 2021-07-16 |
| CN113118486B true CN113118486B (en) | 2022-05-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110445267.1A Active CN113118486B (en) | 2021-04-25 | 2021-04-25 | Rough and fine boring cutter |
Country Status (1)
| Country | Link |
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| CN (1) | CN113118486B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE7936754U1 (en) * | 1979-12-29 | 1981-06-11 | Komet Stahlhalter- Und Werkzeugfabrik Robert Breuning Gmbh, 7122 Besigheim | TURNING HEAD, IN PARTICULAR PANEL TURNING HEAD |
| JPS5828404A (en) * | 1981-07-31 | 1983-02-19 | Toyota Motor Corp | Recessing tool |
| DE4125106A1 (en) * | 1991-07-30 | 1993-02-04 | Wozar Tiberius | Turning-tool arrangements with centrifugal adjusters - have built-in weights which adjust the tool relative to the rotational speed of the spindle |
| CN2732395Y (en) * | 2004-08-19 | 2005-10-12 | 陈硕 | Radial feeding groove boring cutter |
| CN101961793B (en) * | 2009-08-18 | 2012-03-21 | 西安航空发动机（集团）有限公司 | Tip-extension type deep hole boring cutter rod |
| CN205834275U (en) * | 2016-06-08 | 2016-12-28 | 湖北三环汽车方向机有限公司 | A kind of adjustable reverse boring cutter |
-
2021
- 2021-04-25 CN CN202110445267.1A patent/CN113118486B/en active Active
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| CN113118486A (en) | 2021-07-16 |
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