CN111299715A - Automatic foldable anti-scraper - Google Patents
Automatic foldable anti-scraper Download PDFInfo
- Publication number
- CN111299715A CN111299715A CN201911176275.XA CN201911176275A CN111299715A CN 111299715 A CN111299715 A CN 111299715A CN 201911176275 A CN201911176275 A CN 201911176275A CN 111299715 A CN111299715 A CN 111299715A
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- China
- Prior art keywords
- sliding block
- hole
- handle body
- cutter
- cutter head
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D79/00—Methods, machines, or devices not covered elsewhere, for working metal by removal of material
- B23D79/02—Machines or devices for scraping
- B23D79/04—Machines or devices for scraping with rotating cutting-tool, e.g. for smoothing linings of bearings
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
Abstract
An automatic folding type reverse scraper comprises a cutter head body and a cutter handle body, wherein a blade is arranged at the front end of the cutter head body, the rear part of the cutter head body is hinged to a cutter head mounting groove through a cylindrical pin, the cylindrical pin is located on the center line of the cutter handle body, an arc-shaped edge is arranged at the position, close to the hinged position, of the cutter head body, teeth are uniformly distributed on the arc-shaped edge, a rack shaft is arranged in an axial hole, a section of rack is arranged at the front end part of the rack shaft, a radial hole is formed in the middle of the cutter handle; the elastic telescopic sliding block is movably arranged at the radial hole; the elastic telescopic sliding block is of a step-shaped structure, the small head part is close to the central line of the knife handle body, the large head part is far away from the central line of the knife handle body, the small head part of the elastic telescopic sliding block is provided with a chute, and the rear end part of the rack shaft extends out of the axial hole and is arranged in the chute. The invention has simple operation, safe and reliable action, simple structure of the internal centrifugal device, small occupied space and no influence on the rigidity of the knife handle body.
Description
Technical Field
The invention belongs to the field of metal cutting machining, and particularly relates to a reverse scraper for a numerical control machine tool, which is mainly used for machining an inner end face of a hole.
Background
In the numerical control boring processing, the inner end face of some holes often needs to be processed in a reverse scraping mode, a common method is to use a rough boring cutter bar, firstly, the cutter bar extends into the holes, a reverse scraping cutter head is installed into a square hole of the cutter bar from the front end of the cutter bar, the extending length is adjusted, the reverse scraping cutter head is fixed through a screw, the reverse scraping end face processing is started, after the processing is finished, the reverse scraping cutter head is manually disassembled, then, the cutter bar is retreated out of the holes, and due to the fact that manual cutter installing, cutter adjusting and cutter disassembling are needed, the operation is complex, the efficiency is low, and the automatic processing is not facilitated.
The automatic telescopic reverse scraper in the market is characterized in that a shaft shoulder on a reverse scraper rod and the end face of a workpiece are in relative displacement to generate pressure, and a reverse scraper head is opened and self-locked through an internal key self-locking mechanism. When the tool bit retracts, the shaft shoulder on the reverse scraper rod and the end face of the workpiece are relatively displaced to generate pressure, and the reverse scraper head retracts and is self-locked through the internal key self-locking mechanism. The disadvantage is that the cutter bar of the reverse scraper must be about 200 mm longer than the actual length because the internal key self-locking mechanism needs a certain distance of compression stroke, so that the rigidity of the cutter bar is poor. In addition, the mechanism is complex and high in cost.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides the automatic folding type reverse scraper, wherein the reverse scraper head can automatically extend out by means of the centrifugal force generated by the rotation of the cutter handle body in the process of machining the reverse scraping end face; after the processing, the main shaft stops, and the reverse scraper head automatically retracts into the cutter handle body, so that automatic processing can be realized, and manual interference is not needed in the whole process.
The technical scheme of the invention is as follows: the cutter comprises a cutter head body and a cutter handle body, wherein a blade is arranged at the front end of the cutter head body, the rear part of the cutter head body is hinged to a cutter head mounting groove at the front end of the cutter handle body through a cylindrical pin, the cylindrical pin is positioned on the center line of the cutter handle body, an arc-shaped edge is arranged at the position, close to the hinged position, of the cutter head body, teeth are uniformly distributed on the arc-shaped edge, a rack shaft is arranged in an axial hole which is axially arranged in the cutter handle body, a distance is reserved between the axial hole axis and the cutter handle body axis, a section of rack which is meshed with the teeth on the cutter head body is arranged at the front end part of; the tool holder further comprises an elastic telescopic sliding block which can do centrifugal/centripetal motion along the radial hole when the tool holder body rotates, and the elastic telescopic sliding block is movably arranged at the radial hole; the elastic telescopic sliding block is of a step-shaped structure, the small head part is close to the central line of the tool holder body, the large head part is far away from the central line of the tool holder body, the small head part of the elastic telescopic sliding block is provided with a chute which is used for driving the rack shaft to move forwards and backwards along the axial hole so as to drive the tool bit body to rotate so as to open/retract the tool bit mounting groove, and the rear end part of the rack shaft extends out of the axial hole and is arranged in the chute.
The slide block is of a step-shaped structure and comprises a small end and a large end, the chute is positioned on the front side of the small end of the slide block, a boss is arranged on the rear side of the small end of the slide block, one end of the spring abuts against the boss, and the other end of the spring abuts against a cover plate arranged at the hole opening of the radial hole; the sliding block and the spring form an elastic telescopic sliding block.
The radial hole is a step-shaped hole and comprises a large hole part and a small hole part, the large hole part is a step-shaped hole matched with the sliding block, and the boss is matched with the small hole part; the joint of the boss and the sliding block forms a step surface matched with the radial hole.
The boss has a cylindrical portion adapted to the inner diameter of the spring.
The chute is the little oblique T type groove of big notch portion in tank bottom portion, including the big slot portion that is located the bottom, the little slot portion that links to each other with big slot portion, big slot portion tank bottom is the inclined plane, and the scope of the contained angle C between inclined plane and the handle of a knife body are radial 23 ~ 27.
The rack shaft rear portion side symmetry is equipped with two plane portions with little trough portion complex, and there is cylindrical arch plane portion end, and big trough portion is arranged in to cylindrical arch.
The tool holder body is of a stepped cylindrical structure, the front end of the tool holder body is a thin cylindrical part, the rear end of the tool holder body is a thick cylindrical part, and the radial hole is formed in the thick cylindrical part.
The tool bit mounting groove is an inclined mounting groove, and an included angle B = 18-24 degrees between the bottom surface of the inclined mounting groove and the axis of the tool handle body; the front end of the knife handle body is provided with a square hole which is communicated along the radial direction, and the left end of the square hole is communicated with the knife head mounting groove and is used for mounting the knife head body. The cutter head body is plugged into the square hole along the radial direction.
The inclined plane on the sliding block is intersected with the axial hole of the tool shank body. The slide block moves along the radial direction, is vertical to the central line of the tool holder body and is positioned at the position of the rack shaft, and the slide block can drive the rack shaft to axially move and drive the head body to rotate to open after moving outwards under the centrifugal force when the tool holder body rotates; when the knife handle body stops rotating, the sliding block retracts into the knife handle body under the elastic force of the spring, the rack shaft can be driven to axially move, and the driving head body retracts into the knife handle body; the axis of the rack shaft is parallel to the axis of the tool holder body.
The modulus of the teeth of the rack shaft and the teeth of the cutter head is 0.5 +/-0.1; the distance A between the axis of the tool shank body and the axis of the axial hole is 10 +/-2 mm. When the knife handle body rotates until the spring elasticity borne by the sliding block is smaller than the centrifugal force borne by the sliding block, the sliding block moves outwards along the radial hole; when the knife handle body rotates until the spring force borne by the sliding block is larger than the centrifugal force borne by the sliding block, the sliding block moves inwards along the radial hole.
The extension and contraction of the cutter head body are controlled by the centrifugal force generated by the rotation of the cutter handle body. When the cutter handle rotates, the reverse scraping head extends out, and the reverse scraping end face machining is started; when the rotation of the knife handle stops, the reverse scraper head is automatically folded and retracted into the knife handle body. The cutter head can automatically extend and retract, and automatic machining can be realized without manual intervention in the whole process; the operation is simple and convenient, the action is safe and reliable, the structure of the internal centrifugal device is simple, the occupied space is small, and the rigidity of the knife handle body is not influenced.
Drawings
Fig. 1 is one of the structural schematic diagrams of the present invention (the cutter head body 3 is in an open state);
FIG. 2 is a second schematic structural view of the present invention (the tool bit body 3 is retracted);
FIG. 3 is an enlarged view of a portion of FIG. 1;
FIG. 4 is an enlarged view of a portion of FIG. 2;
FIG. 5 is a schematic view of the shank body 5;
FIG. 6 is a bottom view of FIG. 5;
FIG. 7 is a top view of FIG. 5;
fig. 8 is a schematic structural view of the slider 7;
FIG. 9 is a left side view of FIG. 8;
FIG. 10 is a top view of FIG. 8;
fig. 11 is a schematic structural view of the rack shaft 6;
fig. 12 is a top view of fig. 11.
Detailed Description
In fig. 1-12, the cutting edge of the tool bit body 3 is in the form of an indexable insert 2, which is fixed to a tool bit mounting groove by two insert locking screws 1, the tool bit mounting groove is an inclined mounting groove, and the bottom surface of the inclined mounting groove forms an angle B =18 ° with the axis of the tool holder body 5. The blade has 1 blade, and it is convenient to change. The left end of the knife handle body 5 is a 7:24 standard taper shank, the right end of the knife handle body is provided with a square hole and a chute and used for installing the knife head body 3, the square hole is provided with a round hole and used for inserting the cylindrical pin 4 and fixing the knife head body 3, the knife head body 3 can rotate around the axis of the cylindrical pin 4 and can retract into the knife handle body 5, the middle of the knife handle body 5 is provided with a square hole and used for installing the sliding block 7, the sliding block 7 can freely slide in the square hole, the right end face of the knife handle body is provided with a hole which is axially communicated and used for installing the rack shaft 6, the right end of the rack shaft 6 is provided with a section of rack 63, and the left end of the rack shaft is. The slider 7 is plate-shaped, and one end is the rectangle, and with the square hole sliding fit in the middle of the handle of a knife, has an oblique T type groove above, and two cylindrical protrusions of the left end of rack shaft 6 cooperate with the oblique T type groove of slider 7, can follow oblique T type groove and slide. One end of the cutter head body 3 is provided with a part of gear which is meshed with a rack at the right end of the rack shaft 6, and the sliding block 7 is fixed on the cutter handle body 5 through a spring 8, a cover plate 9 and a screw 10 and can slide outwards along a square hole in the middle of the cutter handle body 5 under the action of centrifugal force. The diameter of the steel wire of the spring 8 is 1mm, the middle diameter is 11mm, the free length is 52mm, when the cutter head body 3 is in a folded state, the compression amount of the spring is 10mm, and the elastic force of the spring is 0.75 Kg; when the cutter head body 3 is in an open state, the compression amount of the spring is 30mm, and the elastic force of the spring is 2.15 Kg. The mass of the sliding block 7 is 0.25Kg, the working speed of the knife handle body 5 is 500-550 rpm when the knife head body 3 is opened, and the generated centrifugal force (driving force) is 30-36 Kg. The distance A between the axis of the knife handle body 5 and the axis of the axial hole is 10 mm.
The sliding block 7 is of a step-shaped structure and comprises a small end 75 and a large end 76, the chute is located on the front side of the small end of the sliding block 7, a boss 74 is arranged on the rear side of the small end of the sliding block 7, one end of the spring 8 abuts against the boss 74, and the other end of the spring 8 abuts against a cover plate 9 arranged at a hole opening of the radial hole. The projection 74 has a cylindrical portion 741 adapted to the inner diameter of the spring 8.
The inclined T-shaped groove comprises a large groove part 71 located at the bottom and a small groove part 72 connected with the large groove part, the bottom of the large groove part is an inclined surface 73, and the included angle C between the inclined surface 73 and the radial direction of the tool holder body 5 is 23 degrees. Two plane parts 62 matched with the small groove part 72 are symmetrically arranged on the side surface of the rear part of the rack shaft 6, a cylindrical protrusion 61 is arranged at the end part of the plane part 62, and the cylindrical protrusion 61 is arranged in the large groove part 71.
When the tool is in operation, when the tool holder body 5 rotates on the main shaft, under the action of centrifugal force, the sliding block 7 overcomes the pressure of the spring 8 to move outwards to drive the rack shaft 6 to move leftwards, the rack drives the tool bit body 3 to rotate clockwise, and the tool bit body 3 is opened and extends out of the tool holder, so that the machining of the reverse scraping end face can be started (see fig. 1); after the machining is finished, the cutter handle body 5 stops rotating, the sliding block 7 is pushed to the center of the cutter handle body 5 under the action of the spring 8, the rack shaft 6 is driven to move rightwards, the rack drives the cutter head body 3 to rotate anticlockwise, and the cutter head body 3 retracts into the cutter handle body 5 (see fig. 2).
Claims (10)
1. An automatic foldable anti-scraper which characterized in that: the cutter head comprises a cutter head body (3) and a cutter handle body (5), wherein a blade (2) is arranged at the front end of the cutter head body (3), the rear part of the cutter head body (3) is hinged to a cutter head mounting groove at the front end of the cutter handle body (5) through a cylindrical pin (4), the cylindrical pin (4) is positioned on the central line of the cutter handle body (5), an arc-shaped edge is arranged at the position, close to the hinged part, of the cutter head body (3), teeth are uniformly distributed on the arc-shaped edge, a rack shaft (6) is arranged in an axial hole which is axially arranged in the cutter handle body (5), a distance is reserved between the axial hole axis and the axis of the cutter handle body (5), a section of rack (63) which is meshed with the teeth on the cutter head body (3) is arranged at the front end part of the rack shaft (6), a radial; the tool also comprises an elastic telescopic sliding block which can do centrifugal/centripetal motion along the radial hole when the tool handle body (5) rotates, and the elastic telescopic sliding block is movably arranged at the radial hole; the elastic telescopic sliding block is of a step-shaped structure, the small head part is close to the center line of the knife handle body (5), the large head part is far away from the center line of the knife handle body (5), the small head part of the elastic telescopic sliding block is provided with a chute which is used for driving the rack shaft (6) to move forwards and backwards along the axial hole so as to drive the knife head body (3) to rotate to open/retract the knife head mounting groove, and the rear end part of the rack shaft (6) extends out of the axial hole and is arranged in the chute.
2. The automatic folding reverse scraper according to claim 1, characterized in that: the sliding block (7) is of a step-shaped structure and comprises a small end (75) and a large end (76), the chute is positioned on the front side of the small end of the sliding block (7), a boss (74) is arranged on the rear side of the small end of the sliding block (7), one end of the spring (8) abuts against the boss (74), and the other end of the spring (8) abuts against a cover plate (9) arranged at the hole opening of the radial hole; the sliding block (7) and the spring (8) form an elastic telescopic sliding block.
3. The automatic folding reverse scraper according to claim 2, characterized in that: the radial hole is a step-shaped hole and comprises a large hole part and a small hole part, the large hole part is a step-shaped hole matched with the sliding block (7), and the boss (74) is matched with the small hole part; the joint of the boss and the sliding block (7) forms a step surface matched with the radial hole.
4. The automatic folding reverse scraper according to claim 2, characterized in that: the boss (74) has a cylindrical portion (741) adapted to the inner diameter of the spring (8).
5. The automatic folding reverse scraper according to claim 1, characterized in that: the chute is the little oblique T type groove of big notch portion in tank bottom portion, including big notch portion (71) that are located the bottom, little notch portion (72) that link to each other with big notch portion, big notch portion tank bottom is inclined plane (73), and the radial contained angle C's between inclined plane (73) and handle of a knife body (5) scope is 23 ~ 27.
6. The automatic folding reverse scraper according to claim 5, characterized in that: the rack shaft (6) is characterized in that two plane parts (62) matched with the small groove part (72) are symmetrically arranged on the side surface of the rear part of the rack shaft (6), a cylindrical protrusion (61) is arranged at the end part of each plane part (62), and the cylindrical protrusion (61) is arranged in the large groove part (71).
7. The automatic folding reverse scraper according to claim 1, characterized in that: the tool holder body (5) is of a stepped cylindrical structure, the front end of the tool holder body is a thin cylindrical part, the rear end of the tool holder body is a thick cylindrical part, and the radial hole is formed in the thick cylindrical part.
8. The automatic folding reverse scraper according to claim 1, characterized in that: the tool bit mounting groove is an inclined mounting groove, and an included angle B = 18-24 degrees between the bottom surface of the inclined mounting groove and the axis of the tool handle body (5); the front end of the knife handle body (5) is provided with a square hole which is communicated along the radial direction, and the left end of the square hole is communicated with the knife head mounting groove.
9. The automatic folding reverse scraper according to claim 1, characterized in that: the inclined plane on the sliding block (7) is intersected with the axial hole of the tool shank body (5).
10. The automatic folding reverse scraper according to claim 1, characterized in that: the modulus of the teeth of the rack shaft (6) and the teeth of the cutter head (3) is 0.5 +/-0.1; the distance A between the axis of the knife handle body (5) and the axis of the axial hole is 10 +/-2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911176275.XA CN111299715A (en) | 2019-11-26 | 2019-11-26 | Automatic foldable anti-scraper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911176275.XA CN111299715A (en) | 2019-11-26 | 2019-11-26 | Automatic foldable anti-scraper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111299715A true CN111299715A (en) | 2020-06-19 |
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ID=71154298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911176275.XA Pending CN111299715A (en) | 2019-11-26 | 2019-11-26 | Automatic foldable anti-scraper |
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| Country | Link |
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| CN (1) | CN111299715A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113927053A (en) * | 2021-11-05 | 2022-01-14 | 二重（德阳）重型装备有限公司 | Tool and method for machining intersecting fillet of wall of closed inner arc hole of small deep hole |
| CN114559077A (en) * | 2022-03-14 | 2022-05-31 | 贵阳博亚机械制造有限公司 | Tool for facing machining of narrow-cavity inner groove hole and machining method |
| CN118268614A (en) * | 2024-06-03 | 2024-07-02 | 宁波江丰芯创科技有限公司 | Machining tool and machining method for reverse groove of gas distribution plate |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103008791A (en) * | 2012-12-07 | 2013-04-03 | 上海锅炉厂有限公司 | Multilevel-positioning scraping plate of rotary cutter |
| CN104785861A (en) * | 2014-01-17 | 2015-07-22 | 上海派尼科技实业有限公司 | Centrifugal chamfer cutter |
| CN204912868U (en) * | 2015-09-07 | 2015-12-30 | 泰富重工制造有限公司 | Foldable anti - countersink utensil |
| CN208825750U (en) * | 2018-09-04 | 2019-05-07 | 常州鑫佳顺工具制造有限公司 | A kind of anti-scraper |
| KR20190083864A (en) * | 2018-01-05 | 2019-07-15 | 조권희 | Insert back counter bar |
| CN209224234U (en) * | 2019-01-03 | 2019-08-09 | 深圳市粤百翔科技有限公司 | A kind of accurate cutting die of high tolerance |
-
2019
- 2019-11-26 CN CN201911176275.XA patent/CN111299715A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103008791A (en) * | 2012-12-07 | 2013-04-03 | 上海锅炉厂有限公司 | Multilevel-positioning scraping plate of rotary cutter |
| CN104785861A (en) * | 2014-01-17 | 2015-07-22 | 上海派尼科技实业有限公司 | Centrifugal chamfer cutter |
| CN204912868U (en) * | 2015-09-07 | 2015-12-30 | 泰富重工制造有限公司 | Foldable anti - countersink utensil |
| KR20190083864A (en) * | 2018-01-05 | 2019-07-15 | 조권희 | Insert back counter bar |
| CN208825750U (en) * | 2018-09-04 | 2019-05-07 | 常州鑫佳顺工具制造有限公司 | A kind of anti-scraper |
| CN209224234U (en) * | 2019-01-03 | 2019-08-09 | 深圳市粤百翔科技有限公司 | A kind of accurate cutting die of high tolerance |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113927053A (en) * | 2021-11-05 | 2022-01-14 | 二重（德阳）重型装备有限公司 | Tool and method for machining intersecting fillet of wall of closed inner arc hole of small deep hole |
| CN114559077A (en) * | 2022-03-14 | 2022-05-31 | 贵阳博亚机械制造有限公司 | Tool for facing machining of narrow-cavity inner groove hole and machining method |
| CN118268614A (en) * | 2024-06-03 | 2024-07-02 | 宁波江丰芯创科技有限公司 | Machining tool and machining method for reverse groove of gas distribution plate |
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Application publication date: 20200619 |