CN104128636A - Small-cavity inner hole belt supporting modularized boring tool and use method - Google Patents
Small-cavity inner hole belt supporting modularized boring tool and use method Download PDFInfo
- Publication number
- CN104128636A CN104128636A CN201410368467.1A CN201410368467A CN104128636A CN 104128636 A CN104128636 A CN 104128636A CN 201410368467 A CN201410368467 A CN 201410368467A CN 104128636 A CN104128636 A CN 104128636A
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- boring
- cutter
- handle
- knife
- cutter head
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Classifications
-
- 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
- B23B29/02—Boring bars
-
- 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
- B23B29/02—Boring bars
- B23B29/027—Steadies for boring bars
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2215/00—Details of workpieces
- B23B2215/76—Components for turbines
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Abstract
The invention discloses a small-cavity inner hole belt supporting modularized boring tool which comprises a cutter handle, a cutter bit, a supporting sleeve and a boring cutter. The cutter handle and the cutter bit are of a split connecting structure and can be conveniently installed in a small cavity. The supporting sleeve is installed on the cutter handle. The boring cutter is installed at the top end of the cutter bit. A sliding bearing is naturally formed in the machining process of the supporting sleeve. Under the condition that accuracy of a machined hole system is not damaged, rigidity of a boring rod is fully improved. The supporting sleeve has certain axial locating adjustment amount and is large in coverage size. The problems that a boring rod is large in suspended extending length, poor in deflection and the like when a high-accuracy circular hole inside a typical small-opening large-belly cavity is bored are effectively solved. The cutter handle and the cutter bit are designed in a split mode, the operation requirement for machining a small cavity is met, and accuracy and strength of the boring rod are guaranteed. By the adoption of a modularized thought, a connecting mode of main parts such as the cutter handle, the cutter bit, a supporting block and the like of the tool is simple and reliable, all the main parts can be modified according to the actual condition, and use is convenient and rapid.
Description
Technical field
The present invention relates to the endoporus processing of the narrow and small chamber that young tripe is large.Pore area support module boring instrument and using method in a kind of capacitor specifically.
Background technology
Industrial steam turbine is the crucial chain drive of all kinds of Large Scale Industrial Process.According to its specific use, industrial steam turbine is widely used in the industrial circles such as chemical industry, metallurgy, electric power, light industry, power station.With respect to power station steam turbine, the important spare part of industrial steam turbine usually has some special Design and manufacture requirements of formulating according to its specific use.Because the bearing housing structure size of some industrial steam turbine is little, box inner structure is complicated, requires machining accuracy high, at the endoporus that need to carry out the narrow and small chamber that the young tripe of bearing housing bearing guard is large, adds man-hour, larger with the processing difference of traditional bearing box of steam turbine.Existing processing scheme is: use the anti-boring of dedicated boring rod to process this bearing guard front and back two place's brearing bores.Although adopt existing processing scheme can guarantee positioning precision and the dimensional requirement of front end brearing bore in bearing guard, but because its rear end brearing bore is far away apart from bearing housing front end face, about 200mm, the draw ratio of boring bar surpasses 5, in processing, boring bar amount of deflection is poor, directly affect the machining accuracy of brearing bore, cause actual center line the decentraction of former and later two brearing bores.
Summary of the invention
The object of the invention is in order to overcome above-mentioned technical problem, pore area support module boring instrument and using method in a kind of capacitor are provided, solved well the internal bore boring quality problems in mouthful narrow and small cavity that large tripe is little, met the high requirement of machining accuracy.
Realizing technical scheme of the present invention is: pore area support module boring instrument in a kind of capacitor, comprises handle of a knife, cutter head, splicing sleeve and boring cutter; Described handle of a knife, cutter head are split type syndeton; Described splicing sleeve is socketed on handle of a knife; Described boring cutter is arranged on cutter head top; Described handle of a knife, cutter head be split type be mainly to install in order to be convenient in capacitor inside.
Described handle of a knife diameter is slightly less than the outer bore dia of workpiece; Described splicing sleeve is circular sleeve, and its inner circle matches with handle of a knife, its cylindrical and workpiece front end endoporus matched in clearance; Between described splicing sleeve and handle of a knife seam, pad Gaskets; The effect of splicing sleeve is the rigidity that improves boring bar.
There are two symmetrical place's positioning splines described handle of a knife both sides, have respectively positioning screw hole in groove, and two screws are dislocation layout; Positioning spline is provided with locating piece, and this locating piece can be adjusted vertically position in groove; On described locating piece, have kidney slot, with holding screw, through kidney slot, locating piece is fixed on handle of a knife, and after installing, splicing sleeve diameter can not be given prominence in holding screw top.
Described handle of a knife is completed and is connected by the pin-and-hole structure on end face and end bond structure with cutter head.
Described cutter head front end face has straight pin, and this straight pin front end is with conical surface guide frame; The front end face of described handle of a knife has cylinder pin hole; Described straight pin and cylinder pin hole are suitable.
The two symmetrical place's keyway arrangements that are useful on transmitting torque between described handle of a knife and cutter head have the fixedly screw of handle of a knife cutter head on this keyway.
Described handle of a knife upper end key is arcuation, has the keyway arrangements supporting with shank end key on cutter head, and this structure is easy to process.
There is the square boring cutter cutter groove that boring cutter is installed described cutter head end, described boring cutter by square toes holding screw coordinate with radial compaction screw, boring cutter axial compression screw coordinates tightening with axial compression screw.
A method of using pore area support module boring instrument in above-mentioned capacitor, comprises the steps:
1) first on workpiece, boring, as outer hole and the front end endoporus of installing hole, and simultaneously at front end boring one basic circle of rear end endoporus, is shown in light, for boring cutter tool setting, looks for;
2) handle of a knife is mounted to boring spindle;
3) travelling table, passes hole as installing hole from outside using handle of a knife;
4) from the inner side in outer hole, splicing sleeve is arranged on handle of a knife; Between splicing sleeve and handle of a knife seam, pad Gaskets and adjust splicing sleeve position; The adjustment of splicing sleeve position is installed locating piece after determining in the positioning spline of handle of a knife both sides, makes locating piece press closer splicing sleeve, and with holding screw by the kidney slot stationary positioned piece on locating piece; And after installing, splicing sleeve diameter can not be given prominence in holding screw top;
5) cutter head is installed, by cutter head front end face with conical surface guide frame straight pin, insert the front end face cylinder pin hole of handle of a knife; To between handle of a knife and cutter head, be useful on two symmetrical place's keyway arrangements of transmitting torque simultaneously, with holding screw through end the tightening hole on key, then penetrate on this keyway the fixedly screw of handle of a knife cutter head, and tightening;
6) boring cutter is installed, boring cutter is installed on to the square boring cutter cutter groove of cutter head end, use square toes holding screw coordinates with radial compaction screw, boring cutter axial compression screw coordinates tightening with axial compression screw, by boring cutter pretension;
7) by the front end basic circle of rear end endoporus, complete boring cutter tool setting, during tool setting, can be used in conjunction with standard clearance gauge, finally determine boring cutter position, and finally by step 6), fix this boring cutter, heavy boring rear end endoporus, monolateral made allowance;
8) by the endoporus of having processed, check center, and right boring endoporus.
The invention has the beneficial effects as follows:
1, introduced splicing sleeve structure, this splicing sleeve is sliding bearing of self-assembling formation in process, in the situation that not destroying manufactured hole and being precision, has fully improved the rigidity of boring bar.Splicing sleeve has certain axial location adjustment amount, and support size is large.The problems such as that the boring bar existing while efficiently solving the large chamber interior high accuracy of the young tripe circular hole boring of typicalness overhangs is long, amount of deflection is poor.
2, adopt the split-type design of handle of a knife and cutter head, met the operational requirements of capacitor processing, guaranteed precision and the intensity of boring bar.
3, adopt modularization thinking, its main parts size, as simple and reliable in connecting modes such as handle of a knife, cutter head, rest pads, all can change a social system according to actual conditions, easy to use.
Accompanying drawing explanation
Fig. 1 is workpiece schematic appearance;
Fig. 2 is the A-A view of Fig. 1;
Fig. 3 is structural representation of the present invention;
Fig. 4 is Knife handle structure schematic diagram;
Fig. 5 is that the A of Fig. 4 is to view;
Fig. 6 is cutter head structure schematic diagram;
Fig. 7 is that the B of Fig. 6 is to schematic diagram;
Fig. 8 is positioning block structure schematic diagram;
Fig. 9 is the B-B view of Fig. 8.
Number in the figure: 1-handle of a knife, 2-cutter head, 3-splicing sleeve, 4-locating piece, 5-holding screw, 6-pad, 7-boring cutter axial compression screw, 8-square toes holding screw, 9-boring cutter, 10-the shaft part that contacts with outer hole, 11-splicing sleeve is installed shaft part, 12-positioning spline, 13-positioning screw hole, 14-cylinder pin hole, 15-end key, 16-tightening hole, 17-straight pin, 18-side keyway, 19-square boring cutter mounting groove, 20-boring cutter radial compaction screw, 21-boring cutter axial compression screw, 22-outer hole, 23-front end endoporus, 24-rear end endoporus, 25-workpiece, 26-kidney slot, 27-kidney slot step, Φ E-outer bore dia, Φ D-diameter of bore.
The specific embodiment
As shown in Figures 1 to 9, the bearing housing dead eye boring of certain type industrial steam turbine of take is example, and pore area support module boring instrument in a kind of capacitor, comprises handle of a knife 1, cutter head 2, splicing sleeve 3 and boring cutter 9; Described handle of a knife 1 has adopted the Φ 40 matching with numerical control borer numerical control interface to scabble handle structure.The outer hole 22 of workpiece 25 is bearing housing casing front end installing hole, and its outer bore dia Φ E is 40mm, and diameter of bore Φ D is greater than outer bore dia Φ E, is typical young tripe macrostructure.Endoporus is divided into front end endoporus 23 and rear end endoporus 24, and front end endoporus 23 is front end dead eye, and rear end endoporus 24 is rear end bearing hole.Consider the only structure of mounting hole of 40mm of bearing housing casing point diameter, shaft part 10 diameters that the diameter dimension of boring bar contacts with casing end face installing hole at handle of a knife 1 are Φ 39.5mm.In order to improve the rigidity of boring bar, this boring bar specialized designs splicing sleeve 3.Splicing sleeve 3 adopts brass (H62) material to make, and structure is a circular sleeve.Splicing sleeve 3 inner circles match with boring bar handle of a knife 1, and its fit tolerance is Φ 37H7/ h6.Consider that bearing housing front end endoporus 23 processing dimensions are Φ 50(+0.05,0), for guaranteeing that splicing sleeve 3 cylindricals match with bearing housing front end endoporus 23, its design size is Φ 49.5(+0.05,0).Feed stroke when the total length of splicing sleeve 3 should be able to cover boring rear bearing hole.For realizing splicing sleeve 3 in the location of boring bar and the position adjustment on axial direction, this Design of Boring Bar has locating piece 4.On this locating piece 4, have kidney slot 26, in groove, have kidney slot step 27, with holding screw 5, through kidney slot 26, locating piece 4 is fixed on handle of a knife 1, and after installing, splicing sleeve 3 diameters can not be given prominence in holding screw 5 tops.This locating piece 4 can be adjusted vertically position in groove, can realize the axial location adjustment of maximum 8mm.The Front-end Design of handle of a knife 1 has two symmetrical place's positioning splines 12, is designed with respectively M6-6H positioning screw hole 13 in groove, and two screws are dislocation layout.In working angles, splicing sleeve 3 is matched in clearance with front end endoporus 23, is equivalent to a sliding bearing, thereby plays good supporting role.Between described splicing sleeve 3 and handle of a knife 1 seam, pad Gaskets 6.For guaranteeing that in use splicing sleeve 3 is easy to location and adjusts, in handle of a knife 1, the diameter basic size of splicing sleeve installation shaft part 11 is designed to Φ 37mm.Because splicing sleeve 3 can only be at boring bar handle of a knife 1 through after bearing housing front end installing hole, from box inside, be installed to boring bar handle of a knife 1, and bearing housing cabinets cavity is narrow and small, complex structure, operating space is very limited, therefore, this boring bar adopts split-type structural, and handle of a knife 1 is completed and connected by the pin-and-hole structure on end face and end bond structure with cutter head 2.Wherein, cutter head 2 front end faces are designed with Φ 12H7 straight pin 17, the long 14.5mm of round pin, and front end is with 15 ° of conical surface guide frames.The front end face of handle of a knife 1 is designed with Φ 12h6 cylinder pin hole 14, hole depth 15mm.2 of handle of a knife 1 and cutter heads are also designed with the two symmetrical place's keyway arrangements for transmitting torque except completing location by pin-and-hole structure, and on this keyway, are designed with the fixedly Screw hole structure of handle of a knife 1 cutter head 2.Wherein, handle of a knife 1 upper end key 15 is arcuation, the wide 16mm of key, thick 6mm, length 14mm.On cutter head 2, be designed with the side keyway 18 supporting with shank end key 15, be designed with M6-6H tightening hole 16 simultaneously.Cutter head 2 ends are designed with wide 21mm, high 20(+0.05 ,+0.02) the square boring cutter mounting groove 19 of mm, for boring cutter 9 is installed.The tightening of boring cutter 9 by boring cutter radial compaction screw 20 and boring cutter axial compression screw 21, is screwed into respectively square toes holding screw 8 and boring cutter axial compression screw 7 is realized.It is worth mentioning that, due to boring bar cutter head 2 diameters Φ 37mm only, consider the position of boring cutter radial compaction screw 20, the radial centre lines of square boring cutter mounting groove 19 does not overlap with the center line of boring bar, therefore, design should be taken into account this difference during boring cutter 9, to guarantee that the nose center of boring cutter 9 crosses the center of boring bar.
A method of using pore area support module boring instrument in above-mentioned capacitor, comprises the steps:
1) first on workpiece, boring, as outer hole and the front end endoporus of installing hole, and simultaneously at front end boring one basic circle of rear end endoporus, is shown in light, for boring cutter tool setting, looks for;
2) handle of a knife is mounted to boring spindle;
3) travelling table, passes hole as installing hole from outside using handle of a knife;
4) from the inner side in outer hole, splicing sleeve is arranged on handle of a knife; Between splicing sleeve and handle of a knife seam, pad Gaskets and adjust splicing sleeve position; The adjustment of splicing sleeve position is installed locating piece after determining in the positioning spline of handle of a knife both sides, makes locating piece press closer splicing sleeve, and with holding screw by the kidney slot stationary positioned piece on locating piece; And after installing, splicing sleeve diameter can not be given prominence in holding screw top;
5) cutter head is installed, by cutter head front end face with conical surface guide frame straight pin, insert the front end face cylinder pin hole of handle of a knife; To between handle of a knife and cutter head, be useful on two symmetrical place's keyway arrangements of transmitting torque simultaneously, with holding screw through end the tightening hole on key, then penetrate on this keyway the fixedly screw of handle of a knife cutter head, and tightening;
6) boring cutter is installed, boring cutter is installed on to the square boring cutter cutter groove of cutter head end, use square toes holding screw coordinates with radial compaction screw, boring cutter axial compression screw coordinates tightening with axial compression screw, by boring cutter pretension;
7) by the front end basic circle of rear end endoporus, complete boring cutter tool setting, during tool setting, can be used in conjunction with standard clearance gauge, finally determine boring cutter position, and finally by step 6), fix this boring cutter, heavy boring rear end endoporus, monolateral made allowance;
8) by the endoporus of having processed, check center, and right boring endoporus.
Claims (9)
1. a pore area support module boring instrument in capacitor, is characterized in that: comprise handle of a knife, cutter head, splicing sleeve and boring cutter; Described handle of a knife, cutter head are split type syndeton; Described splicing sleeve is socketed on handle of a knife; Described boring cutter is arranged on cutter head top.
2. pore area support module boring instrument in capacitor according to claim 1, is characterized in that: described handle of a knife diameter is slightly less than the outer bore dia of workpiece; Described splicing sleeve is circular sleeve, and its inner circle matches with handle of a knife, its cylindrical and workpiece front end endoporus matched in clearance; Between described splicing sleeve and handle of a knife seam, pad Gaskets.
3. according to pore area support module boring instrument in capacitor described in claim 1 or 2, it is characterized in that: there are two symmetrical place's positioning splines described handle of a knife both sides, have respectively positioning screw hole in groove, and two screws are dislocation layout; Positioning spline is provided with locating piece, and this locating piece can be adjusted vertically position in groove; On described locating piece, have kidney slot, with holding screw, through kidney slot, locating piece is fixed on handle of a knife, and after installing, splicing sleeve diameter can not be given prominence in holding screw top.
4. pore area support module boring instrument in capacitor according to claim 1, is characterized in that: described handle of a knife with cutter head by the pin-and-hole structure on end face with hold bond structure to complete to connect.
5. according to pore area support module boring instrument in capacitor described in claim 1 or 4, it is characterized in that: described cutter head front end face has straight pin, this straight pin front end is with conical surface guide frame; The front end face of described handle of a knife has cylinder pin hole; Described straight pin and cylinder pin hole are suitable.
6. according to pore area support module boring instrument in capacitor described in claim 1 or 4, it is characterized in that: between described handle of a knife and cutter head, be useful on two symmetrical place's keyway arrangements of transmitting torque, on this keyway, have the fixedly screw of handle of a knife cutter head.
7. pore area support module boring instrument in capacitor according to claim 6, is characterized in that: described handle of a knife upper end key is arcuation, has the keyway arrangements supporting with shank end key on cutter head.
8. pore area support module boring instrument in capacitor according to claim 1, it is characterized in that: there is the square boring cutter cutter groove that boring cutter is installed described cutter head end, described boring cutter by square toes holding screw coordinate with radial compaction screw, boring cutter axial compression screw coordinates tightening with axial compression screw.
9. use a method for pore area support module boring instrument in above-mentioned capacitor, it is characterized in that, comprise the steps:
1) first on workpiece, boring, as outer hole and the front end endoporus of installing hole, and simultaneously at front end boring one basic circle of rear end endoporus, is shown in light, for boring cutter tool setting, looks for;
2) handle of a knife is mounted to boring spindle;
3) travelling table, passes hole as installing hole from outside using handle of a knife;
4) from the inner side in outer hole, splicing sleeve is arranged on handle of a knife; Between splicing sleeve and handle of a knife seam, pad Gaskets and adjust splicing sleeve position; The adjustment of splicing sleeve position is installed locating piece after determining in the positioning spline of handle of a knife both sides, makes locating piece press closer splicing sleeve, and with holding screw by the kidney slot stationary positioned piece on locating piece; And after installing, splicing sleeve diameter can not be given prominence in holding screw top;
5) cutter head is installed, by cutter head front end face with conical surface guide frame straight pin, insert the front end face cylinder pin hole of handle of a knife; To between handle of a knife and cutter head, be useful on two symmetrical place's keyway arrangements of transmitting torque simultaneously, with holding screw through end the tightening hole on key, then penetrate on this keyway the fixedly screw of handle of a knife cutter head, and tightening;
6) boring cutter is installed, boring cutter is installed on to the square boring cutter cutter groove of cutter head end, use square toes holding screw coordinates with radial compaction screw, boring cutter axial compression screw coordinates tightening with axial compression screw, by boring cutter pretension;
7) by the front end basic circle of rear end endoporus, complete boring cutter tool setting, during tool setting, can be used in conjunction with standard clearance gauge, finally determine boring cutter position, and finally by step 6), fix this boring cutter, heavy boring rear end endoporus, monolateral made allowance;
8) by the endoporus of having processed, check center, and right boring endoporus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410368467.1A CN104128636A (en) | 2014-07-30 | 2014-07-30 | Small-cavity inner hole belt supporting modularized boring tool and use method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410368467.1A CN104128636A (en) | 2014-07-30 | 2014-07-30 | Small-cavity inner hole belt supporting modularized boring tool and use method |
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| CN104128636A true CN104128636A (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410368467.1A Pending CN104128636A (en) | 2014-07-30 | 2014-07-30 | Small-cavity inner hole belt supporting modularized boring tool and use method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106735386A (en) * | 2016-12-26 | 2017-05-31 | 渤海造船厂集团有限公司 | Conical bore end-face processing method |
| CN114226789A (en) * | 2021-11-20 | 2022-03-25 | 济源市腾辉金属构件有限公司 | Device and method for forming curved surface of hammer head tool of precision forging machine |
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| EP0970770A1 (en) * | 1998-07-10 | 2000-01-12 | Gebr. Heller Maschinenfabrik GmbH | Apparatus and method for working drill holes |
| US6536997B1 (en) * | 1999-09-14 | 2003-03-25 | Mapal, Fabrik Fur Prazisionswerkzeuge Dr. Kress Kg | Process for chip-removing machining of bore surfaces |
| CN1994638A (en) * | 2006-12-30 | 2007-07-11 | 林先娥 | A combined multifunctional boring cutter |
| CN201300219Y (en) * | 2008-10-31 | 2009-09-02 | 北京南口轨道交通机械有限责任公司 | Boring shell toolbar |
| CN102784943A (en) * | 2012-07-31 | 2012-11-21 | 武汉船用机械有限责任公司 | Blind hole machining device |
| CN103372666A (en) * | 2012-04-26 | 2013-10-30 | 昆山江锦机械有限公司 | Processing method and concentricity measuring tool for coaxial hole of diesel engine oil supply unit casing |
| CN103706840A (en) * | 2013-12-18 | 2014-04-09 | 贵州赤天化集团有限责任公司 | Boring machining device convenient for use in limited space |
| CN103752883A (en) * | 2014-01-22 | 2014-04-30 | 上海振华重工集团（南通）有限公司 | Method for improving boring precision of trolley frame of container crane and boring tool |
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2014
- 2014-07-30 CN CN201410368467.1A patent/CN104128636A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0970770A1 (en) * | 1998-07-10 | 2000-01-12 | Gebr. Heller Maschinenfabrik GmbH | Apparatus and method for working drill holes |
| US6536997B1 (en) * | 1999-09-14 | 2003-03-25 | Mapal, Fabrik Fur Prazisionswerkzeuge Dr. Kress Kg | Process for chip-removing machining of bore surfaces |
| CN1994638A (en) * | 2006-12-30 | 2007-07-11 | 林先娥 | A combined multifunctional boring cutter |
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| CN103706840A (en) * | 2013-12-18 | 2014-04-09 | 贵州赤天化集团有限责任公司 | Boring machining device convenient for use in limited space |
| CN103752883A (en) * | 2014-01-22 | 2014-04-30 | 上海振华重工集团（南通）有限公司 | Method for improving boring precision of trolley frame of container crane and boring tool |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106735386A (en) * | 2016-12-26 | 2017-05-31 | 渤海造船厂集团有限公司 | Conical bore end-face processing method |
| CN114226789A (en) * | 2021-11-20 | 2022-03-25 | 济源市腾辉金属构件有限公司 | Device and method for forming curved surface of hammer head tool of precision forging machine |
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Application publication date: 20141105 |
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