CN101927367B - Cutter assembly with adjustable cutting turn radius - Google Patents
Cutter assembly with adjustable cutting turn radius Download PDFInfo
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- CN101927367B CN101927367B CN 201010267794 CN201010267794A CN101927367B CN 101927367 B CN101927367 B CN 101927367B CN 201010267794 CN201010267794 CN 201010267794 CN 201010267794 A CN201010267794 A CN 201010267794A CN 101927367 B CN101927367 B CN 101927367B
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Abstract
The invention discloses a cutter assembly with an adjustable cutting turn radius, which comprises a cutter holder body and a cutting component arranged on the cutter holder body, wherein the holding part of the cutter holder body is provided with a cavity arranged in the axial direction and more than two radial threaded holes distributed in the circumferential direction, the threaded holes are communicated with the cavity, a fastening screw is arranged in each radial threaded hole, and the positioning part of the cutting component is positioned in the cavity and is compressed and positioned by the fastening screws. The cutter assembly with the adjustable cutting turn radius has the advantages of free adjustment of the cutting turn radius, simple and convenient adjustment and stable and reliable holding.
Description
Technical field
The present invention relates to the cutter holder of cutting tool, relate in particular to the toolbox of adjustable cutting turn radius.
Background technology
People are in order to improve tool sharpening efficient and to reduce the cutter manufacturing cost, and external diameter is adjustable, and cutter holder rotation class cutter is widely used in the indexable drilling cutters.Usually, the adjustable cutter holder of external diameter is by a kind of special structure the lathe transmission of power to be arrived cutting part, this cutter holder except can be directly and lathe connect transferring power, also has the center tunable arrangement, namely pass through to adjust the distance between cutting part central shaft and the cutter holder central shaft, thereby realize that cutting part is with respect to the change of the radius of gyration of cutter holder central shaft.This kind cutter holder does not more have the adjustable cutter holder in center, have that complex structure, annex quantity are many, quality large, long characteristics overhang, long owing to overhanging in working angles, quality causes greatly general machine tool chief axis power under-supply, and machined surface quality is not good, the processing dimension fluctuation is large, machining accuracy is lower thereby cause in process.In addition, the device that general center is adjustable is to adopt the drill holder of the cylindrical surface structure with inside and outside decentraction or interiorly be the drill holder of cylindrical structure outward for oval structure, its principle all be by change drill holder and cutting part shank contact position to tool holder body central shaft between distance, thereby change the cutting part cutting tip with respect to the radius of gyration of central shaft, the former defective mainly is to adjust cutting turn radius, just must change different drill holders such as the cutting turn radius that needs are different, its cost is too high; The latter's defective mainly is that oval structure is the line contact with contacting of cylindrical structure, and tool holder body is less to the chucking power of cutting part, when high-efficient cutting, because of the little and stressed large vibration that produces easily of chucking power.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, provides a kind of cutting turn radius to regulate arbitrarily, and regulates the toolbox of the adjustable cutting turn radius simple and convenient, that clamping is reliable and stable.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of toolbox of adjustable cutting turn radius, comprise tool holder body and the cutting part that is installed on the tool holder body, the clamping part of described tool holder body is provided with circumferential two the above radial screw bore that distribute of die cavity and edge of offering vertically, described radial screw bore communicates with described die cavity, all be equiped with trip bolt in each radial screw bore, the localization part of described cutting part places in the die cavity and by trip bolt and compresses the location.
Be provided with an above compact heap in the described die cavity, the localization part of described cutting part is provided with at least one plane of orientation, the total quantity of described compact heap and plane of orientation equates with the quantity of described radial screw bore, each radial screw bore is corresponding with a compact heap or a plane of orientation, and the localization part that described trip bolt acts on compact heap and the plane of orientation described cutting part compresses the location.
Described plane of orientation is provided with one, and the radial screw bore corresponding with described plane of orientation is other to be provided with scale mark, and the trip bolt that is installed in this radial screw bore is provided with dial at its end surfaces.
The cutter tip inboard of described cutting part studs with inner blade, and the described cutter tip outside studs with outer blade, and described outer blade has a radially outer cutting edge, and described radially outer cutting edge is orthogonal to plane of orientation.
The localization part of described cutting part is provided with the surface of revolution, and described compact heap comprises at least a in rigidity briquetting and the elastic press, and described rigidity briquetting is provided with an inner peripheral surface that cooperates with the described surface of revolution; Described elastic press is provided with a plurality of inner peripheral surfaces that cooperate with the described surface of revolution, and be provided with clearance plane between adjacent two inner peripheral surfaces, described inner peripheral surface, clearance plane and the surface of revolution are the face of cylinder, and described inner peripheral surface and the surface of revolution have common radius R 1, the radius of described clearance plane is R2, and R1＞R2.
Described radial screw bore and trip bolt are equipped with four, and described compact heap is provided with three, and described plane of orientation is provided with one, and in three compact heaps, the compact heap that is positioned at the plane of orientation opposite is the rigidity briquetting, and other two compact heaps are elastic press.
Be provided with compact heap in the described die cavity, the quantity of described compact heap and position are corresponding one by one with quantity and the position of radial screw bore, and the localization part that described trip bolt acts on the compact heap described cutting part compresses the location.
There is one to be provided with dial at its end surfaces in the described trip bolt, the other scale mark that is provided with of the radial screw bore corresponding with this trip bolt.
The inwall of described die cavity is provided with the compact heap mounting groove, described compact heap places in the compact heap mounting groove, compact heap is provided with screwed hole, the trip bolt that is connected on the compact heap is stepped, its path section is connected with described screwed hole, large footpath section is connected with described radial screw bore, and large footpath section pitch is greater than path section pitch.
The hole central axis of described radial screw bore and the central axis of tool holder body are coplanar.
Compared with prior art, the invention has the advantages that:
The toolbox of adjustable cutting turn radius of the present invention makes the central axis of tool holder body and the central shaft of cutting part produce relative distance by the degree of depth that is screwed into of regulating trip bolt, thereby change the processing external diameter of cutting part, this regulative mode is simple and convenient, cutting turn radius can be regulated arbitrarily, and tool holder body can form reliable strong clamping to cutting part by trip bolt, guarantees the cutting quality after cutting part is setovered.Cooperate with scale mark by dial, can be to the eccentric distance quantitative adjusting of cutting part when realizing adjusting trip bolt, thereby reach the purpose of accurate control cutting part processing external diameter, other trip bolt mainly is to make tool holder body and cutting part close-coupled, strengthen tool holder body to the cutting part clamping force, guarantee that tool holder body can be with the power effective communication to cutting part.The outer blade of cutter tip has a radially outer cutting edge, radially outer cutting edge is orthogonal to plane of orientation, when with the trip bolt of dial the position of plane of orientation quantitatively being regulated, the direction of motion of cutting part is the axis direction with the trip bolt of dial, make outer cutting edge just in time make the position adjustments of synchronous equal amount in the cutting depth direction, thus the easier control actual cut radius of gyration.Compact heap comprises at least a in rigidity briquetting and the elastic press, the easier surface of revolution close contact with cutting part of rigidity briquetting, elastic press has better adaptive ability when off-centre is adjusted, the present invention can all establish four with radial screw bore and trip bolt, compact heap is established three, plane of orientation is established one, in three compact heaps, the compact heap that is positioned at the plane of orientation opposite is the rigidity briquetting, other two compact heaps are elastic press, as the processing external diameter value △ d that adjusts cutting part, all need the central axis of relative tool holder body to adjust △ d/2 with the trip bolt of dial and the rigidity briquetting on this trip bolt opposite, at this moment the rigidity briquetting forms fully with localization part and contacts, and elastic press then contacts with localization part fully by strain, increase its contact area, keep good clamping stability.The trip bolt that is connected on the compact heap is stepped, its path section is connected with described screwed hole, large footpath section is connected with described radial screw bore, and large footpath section pitch is greater than path section pitch, under the effect of this pitch difference, in the process that trip bolt is tightened, the distance between compact heap and the compact heap mounting groove increases gradually, and compresses the localization part of cutting part by compact heap; Compact heap discharges the clamping to localization part when unscrewing trip bolt, so that cutting part can take off from tool holder body, compact heap is owing to keep being threaded and can not coming off with trip bolt, and convenient again clamping cutting part makes the replacing of cutting part and dismantles easier.
Description of drawings
Fig. 1 is main TV structure schematic diagram of the present invention;
Fig. 2 is the three-dimensional structural representation that splits of the present invention;
Fig. 3 is tool holder body front view of the present invention;
Fig. 4 is the B-B cutaway view of Fig. 3;
Fig. 5 is the cutting part front view among the present invention;
Fig. 6 is rigidity briquetting the first stereogram among the present invention;
Fig. 7 is rigidity briquetting the second stereogram among the present invention;
Fig. 8 is elastic press the first stereogram among the present invention;
Fig. 9 is elastic press the second stereogram among the present invention;
Figure 10 is the scale trip bolt stereogram among the present invention;
Figure 11 is without the trip bolt stereogram of scale among the present invention;
Figure 12 is the A-A cutaway view of Fig. 1;
Figure 13 is the perspective view of another embodiment of the present invention;
Figure 14 is the front view of cutting part in another embodiment of the present invention;
Figure 15 is the mounting structure schematic diagram of compact heap in another embodiment of the present invention.
Each label represents among the figure:
100, tool holder body; 101, body afterbody; 102, clamping part; 103, power face; 104, fairing face; 105, technique plane; 106, hole central axis; 107, radial screw bore; 108, die cavity; 109, scale mark; 110, compact heap mounting groove; 111, central axis; 200, trip bolt; 201, end surfaces; 202, hexagon is recessed; 203, dial; 300, compact heap; 300a, rigidity briquetting; 300b, elastic press; 301, inner peripheral surface; 302, clearance plane; 303, screwed hole; 400, cutting part; 401a, inner blade; 401b, outer blade; 402, chip area; 403, central shaft; 404, the surface of revolution; 405, localization part; 406, cutter tip; 407, datum plane; 408, radially outer cutting edge; 409, plane of orientation.
The specific embodiment
Fig. 1 to Figure 12 shows the toolbox embodiment of a kind of adjustable cutting turn radius of the present invention, this toolbox comprises tool holder body 100 and the cutting part 400 that is installed on the tool holder body 100, tool holder body 100 comprises body afterbody 101 and clamping part 102, the clamping part 102 of tool holder body 100 is provided with circumferential two the above radial screw bore 107 that distribute of die cavity 108 and edge of offering vertically, radial screw bore 107 communicates with die cavity 108, each radial screw bore 107 interior trip bolt 200 that all are equiped with, the localization part 405 of cutting part 400 places in the die cavity 108, be provided with the gap between the inwall of localization part 405 and die cavity 108, localization part 405 compresses by trip bolt 200 and is positioned in the die cavity 108, in the present embodiment, body afterbody 101 is provided with the power face 103 of pyramidal structure, this power face 103 is used for being connected with lathe, and the moment of torsion that lathe is produced is delivered to tool holder body 100, clamping part 102 outer surfaces are fairing face 104, uniform some techniques plane 105 on fairing face 104 is in order to offer radial screw bore 107 at clamping part 102.By regulating the central shaft 403 generation relative distances that the degree of depth makes central axis 111 with the cutting part 400 of tool holder body 100 that are screwed into of trip bolt 200, thereby change the processing external diameter of cutting part 400, this regulative mode is simple and convenient, cutting turn radius can be regulated arbitrarily, and tool holder body 100 can form reliable strong clamping to cutting part 400 by trip bolt 200, guarantees the cutting quality after cutting part 400 is setovered.
In the present embodiment, be provided with at least one compact heap 300 in the die cavity 108, the localization part 405 of cutting part 400 is provided with at least one plane of orientation 409, the total quantity of compact heap 300 and plane of orientation 409 equates with the quantity of radial screw bore 107, each radial screw bore 107 is corresponding with a compact heap 300 or plane of orientation 409, trip bolt 200 outer ends are provided with for the hexagon that inserts spanner recessed 202, act on after trip bolt 200 is tightened that the localization part 405 to cutting part 400 compresses the location on compact heap 300 and the plane of orientation 409.In the present embodiment, radial screw bore 107 and trip bolt 200 are provided with four, the hole central axis 106 of radial screw bore 107 is coplanar with the central axis 111 of tool holder body 100, compact heap 300 is provided with three, plane of orientation 409 is provided with one, radial screw bore 107 other the be provided with scale marks 109 corresponding with plane of orientation 409, the trip bolt 200 that is installed in this radial screw bore 107 is provided with dial 203 at its end surfaces 201, dial 203 cooperates with scale mark 109, can be to the eccentric distance quantitative adjusting of cutting part 400 when realizing adjusting trip bolt 200, thereby reach the purpose of accurate control cutting part 400 processing external diameters, and other trip bolt 200 mainly is to make tool holder body 100 and cutting part 400 close-coupled, strengthen 100 pairs of cutting part 400 clamping forces of tool holder body, guarantee that tool holder body 100 can be with the power effective communication to cutting part 400.In the external diameter adjustment process, unclamp first the trip bolt 200 without dial 203, adjust the cutting external diameter by the trip bolt 200 that dial 203 is arranged, when 0 scale place of dial 203 and scale mark 109 alignment, the cutting turn radius adjusted value of cutting part 400 is zero, increase and the minimizing that can realize that by rotating this trip bolt 200 with dial 203 external diameter is adjusted, concrete adjustment amount is determined according to dial 203 and the relative position of scale mark 109, after adjusting to the right place, alternately slowly adjust again the trip bolt 200 without dial 203, realize effective clamping of the localization part 405 of 100 pairs of cutting parts 400 of tool holder body.In the present embodiment, the cutter tip 406 of cutting part 400 is provided with chip area 402, cutter tip 406 inboards stud with inner blade 401a, cutter tip 406 outsides stud with outer blade 401b, outer blade 401b has a radially outer cutting edge 408, radially outer cutting edge 408 is orthogonal to plane of orientation 409, therefore, when quantitatively regulating by this position with 200 pairs of plane of orientations 409 of trip bolt of dial 203, the direction of motion of cutting part 400 is this axis direction with the trip bolt 200 of dial 203, make radially outer cutting edge 408 just in time make the position adjustments of synchronous equal amount in the cutting depth direction, thereby easier control make the actual cut radius of gyration.
In the present embodiment, the inwall of die cavity 108 is provided with compact heap mounting groove 110, compact heap 300 places in the compact heap mounting groove 110, compact heap 300 is provided with screwed hole 303, the trip bolt 200 that is connected on the compact heap 300 is stepped, its path section is connected with screwed hole 303, large footpath section is connected with radial screw bore 107, and large footpath section pitch is greater than path section pitch, under the effect of this pitch difference, in the process that trip bolt 200 is tightened, the distance between compact heap 300 and the compact heap mounting groove 110 increases gradually, and compresses the localization part 405 of cutting part 400 by compact heap 300; The clamping that compact heap 300 discharges localization part 405 when unscrewing trip bolt 200, so that cutting part 400 can take off from tool holder body 100, compact heap 300 is owing to keeping being threaded and can not coming off with trip bolt 200, convenient again clamping cutting part 400 makes the replacing of cutting part 400 and dismounting easier.
The localization part 405 of cutting part 400 is provided with the surface of revolution 404, and compact heap 300 is rigidity briquetting 300a or elastic press 300b, and rigidity briquetting 300a is provided with the inner peripheral surface 301 that cooperates with the surface of revolution 404; Elastic press 300b is provided with a plurality of inner peripheral surfaces 301 that cooperate with the surface of revolution 404, and be provided with clearance plane 302 between adjacent two inner peripheral surfaces 301, inner peripheral surface 301, clearance plane 302 are the face of cylinder with the surface of revolution 404, inner peripheral surface 301 has common radius R 1 with the surface of revolution 404, can maximum rigidity briquetting 300a to the thrust of localization part 405; The radius of clearance plane 302 is R2, and R1＞R2, and in addition, clearance plane 302 can also be the arbitrary surface with respect to inner peripheral surface 301 indents.In three compact heaps 300 of present embodiment, the compact heap 300 that is positioned at plane of orientation 409 opposites is rigidity briquetting 300a, and other two compact heaps 300 are elastic press 300b.When adjusting the processing external diameter value △ d of cutting part 400, all need the central axis 111 of relative tool holder body 100 to adjust △ d/2 with the trip bolt 200 of dial 203 and the rigidity briquetting 300a on these trip bolt 200 opposites, if at this moment other two compact heaps 300 also are that rigidity briquetting 300a then can not contact fully with localization part 405 formation, the elastic press 300b that adopts in the present embodiment then can contact with localization part 405 fully by strain, increase its contact area, keep good clamping stability.
Figure 13 to Figure 15 shows the toolbox embodiment of another kind of adjustable cutting turn radius of the present invention, present embodiment and above-described embodiment are basic identical, difference only is to be provided with in the die cavity 108 four compact heaps 300, the localization part 405 of cutting part 400 is not set bit plane 409, be provided with near localization part 405 places with outer blade 401b radially outside the datum plane 407 of cutting edge 408 quadratures, in four compact heaps 300, the compact heap 300 that is positioned at datum plane 407 sides and datum plane 407 opposite side is rigidity briquetting 300a, and other two compact heaps 300 are elastic press 300b; Four trip bolts 200 act on respectively that the localization part 405 to cutting part 400 compresses the location on the compact heap 300, wherein a trip bolt 200 is provided with dial 203 at its end surfaces 201, radial screw bore 107 other the be provided with scale marks 109 corresponding with this trip bolt 200, this trip bolt 200 is perpendicular to datum plane 407, in order to carry out quantitatively eccentric the adjustment during installation.
Above-mentioned is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction.Although the present invention discloses as above with preferred embodiment, yet is not to limit the present invention.Any those of ordinary skill in the art in the situation that does not break away from the technical solution of the present invention scope, can utilize the technology contents of above-mentioned announcement that technical solution of the present invention is made many possible changes and modification, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical solution of the present invention, all should drop in the scope of technical solution of the present invention protection any simple modification, equivalent variations and modification that above embodiment does according to the technology of the present invention essence.
Claims (5)
1. the toolbox of an adjustable cutting turn radius, comprise tool holder body (100) and be installed in cutting part (400) on the tool holder body (100), it is characterized in that: the clamping part (102) of described tool holder body (100) is provided with circumferential two the above radial screw bore (107) that distribute of die cavity (108) and edge of offering vertically, described radial screw bore (107) communicates with described die cavity (108), all be equiped with trip bolt (200) in each radial screw bore (107), the localization part (405) of described cutting part (400) places in the die cavity (108) and by trip bolt (200) and compresses the location, be provided with an above compact heap (300) in the described die cavity (108), the localization part (405) of described cutting part (400) is provided with at least one plane of orientation (409), the total quantity of described compact heap (300) and plane of orientation (409) equates with the quantity of described radial screw bore (107), each radial screw bore (107) is corresponding with a compact heap (300) or a plane of orientation (409), and described trip bolt (200) acts on compact heap (300) and the upper localization part (405) to described cutting part (400) of plane of orientation (409) compresses the location.
2. the toolbox of adjustable cutting turn radius according to claim 1, it is characterized in that: described plane of orientation (409) is provided with one, the radial screw bore (107) corresponding with described plane of orientation (409) is other to be provided with scale mark (109), and the trip bolt (200) that is installed in this radial screw bore (107) is provided with dial (203) at its end surfaces (201).
3. the toolbox of adjustable cutting turn radius according to claim 2, it is characterized in that: cutter tip (406) inboard of described cutting part (400) studs with inner blade (401a), described cutter tip (406) outside studs with outer blade (401b), described outer blade (401b) has a radially outer cutting edge (408), and described radially outer cutting edge (408) is orthogonal to plane of orientation (409).
4. the toolbox of adjustable cutting turn radius according to claim 3, it is characterized in that: the localization part (405) of described cutting part (400) is provided with the surface of revolution (404), described compact heap (300) comprises at least a in rigidity briquetting (300a) and the elastic press (300b), and described rigidity briquetting (300a) is provided with an inner peripheral surface (301) that cooperates with the described surface of revolution (404); Described elastic press (300b) is provided with a plurality of inner peripheral surfaces (301) that cooperate with the described surface of revolution (404), and be provided with clearance plane (302) between adjacent two inner peripheral surfaces (301), described inner peripheral surface (301), clearance plane (302) are the face of cylinder with the surface of revolution (404), described inner peripheral surface (301) has common radius R 1 with the surface of revolution (404), the radius of described clearance plane (302) is R2, and R1＞R2.
5. the toolbox of adjustable cutting turn radius according to claim 4, it is characterized in that: described radial screw bore (107) and trip bolt (200) are equipped with four, described compact heap (300) is provided with three, described plane of orientation (409) is provided with one, in three compact heaps (300), the compact heap (300) that is positioned at plane of orientation (409) opposite is rigidity briquetting (300a), and other two compact heaps (300) are elastic press (300b).
6
.The toolbox of each described adjustable cutting turn radius in 5 according to claim 1, it is characterized in that: the inwall of described die cavity (108) is provided with compact heap mounting groove (110), described compact heap (300) places in the compact heap mounting groove (110), compact heap (300) is provided with screwed hole (303), the trip bolt (200) that is connected on the compact heap (300) is stepped, its path section is connected with described screwed hole (303), large footpath section is connected with described radial screw bore (107), and large footpath section pitch is greater than path section pitch.
7
.According to claim 1, the toolbox of each described adjustable cutting turn radius in 5, it is characterized in that: the hole central axis (106) of described radial screw bore (107) is coplanar with the central axis (111) of tool holder body (100).
8
.The toolbox of adjustable cutting turn radius according to claim 6 is characterized in that: the hole central axis (106) of described radial screw bore (107) is coplanar with the central axis (111) of tool holder body (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010267794 CN101927367B (en) | 2010-08-31 | 2010-08-31 | Cutter assembly with adjustable cutting turn radius |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010267794 CN101927367B (en) | 2010-08-31 | 2010-08-31 | Cutter assembly with adjustable cutting turn radius |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210287877.4A Division CN102773526B (en) | 2010-08-31 | 2010-08-31 | Tool assembly capable of adjusting cutting rotation radius |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101927367A CN101927367A (en) | 2010-12-29 |
| CN101927367B true CN101927367B (en) | 2013-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010267794 Active CN101927367B (en) | 2010-08-31 | 2010-08-31 | Cutter assembly with adjustable cutting turn radius |
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| Country | Link |
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| CN (1) | CN101927367B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113702807A (en) * | 2021-08-25 | 2021-11-26 | 长鑫存储技术有限公司 | Chip carrier and chip detection device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1493051A (en) * | 1922-09-15 | 1924-05-06 | William L O'brien | Boring tool |
| CN1958231A (en) * | 2006-04-18 | 2007-05-09 | 邱寿山 | Method for fine adjusting amount of feed of boring cutter tool, and adjustment device |
| CN101262969A (en) * | 2005-09-13 | 2008-09-10 | 彗星集团控股有限公司 | Device for detachably coupling two parts |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1621273B1 (en) * | 2004-07-15 | 2008-10-22 | Heinz Kaiser AG | Boring tool |
-
2010
- 2010-08-31 CN CN 201010267794 patent/CN101927367B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1493051A (en) * | 1922-09-15 | 1924-05-06 | William L O'brien | Boring tool |
| CN101262969A (en) * | 2005-09-13 | 2008-09-10 | 彗星集团控股有限公司 | Device for detachably coupling two parts |
| CN1958231A (en) * | 2006-04-18 | 2007-05-09 | 邱寿山 | Method for fine adjusting amount of feed of boring cutter tool, and adjustment device |
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| Publication number | Publication date |
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| CN101927367A (en) | 2010-12-29 |
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