CN102990957A - Electric screw press - Google Patents

Electric screw press Download PDF

Info

Publication number
CN102990957A
CN102990957A CN201110276605XA CN201110276605A CN102990957A CN 102990957 A CN102990957 A CN 102990957A CN 201110276605X A CN201110276605X A CN 201110276605XA CN 201110276605 A CN201110276605 A CN 201110276605A CN 102990957 A CN102990957 A CN 102990957A
Authority
CN
China
Prior art keywords
plate
fixed
cylinder
nut
slide
Prior art date
Application number
CN201110276605XA
Other languages
Chinese (zh)
Inventor
夏巨谌
胡国安
吴彤
汪丽
邹树林
Original Assignee
麻城纳福传动机械有限公司
华中科技大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 麻城纳福传动机械有限公司, 华中科技大学 filed Critical 麻城纳福传动机械有限公司
Priority to CN201110276605XA priority Critical patent/CN102990957A/en
Publication of CN102990957A publication Critical patent/CN102990957A/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B15/00Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/04Frames; Guides
    • B30B15/041Guides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B1/00Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/18Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by screw means

Abstract

The invention discloses an electric screw press, belongs to forging forming equipment, solves the problem that a slider is long and has a small travel in the conventional electric screw press, and is used for producing clay bricks, refractory bricks, common die forgings and precision die forgings. The electric screw press comprises a press body, a main gear, a nut, a screw, a slider body, an ejection cylinder, a left motor, a right motor, a front brake cylinder and a rear brake cylinder; and a left piston cylinder and a right piston cylinder which are bilaterally symmetrical are fixed in the press body. The nut and the main gear are tightened and rotate under the drive of the left and right motors; and the screw and the slider body are connected into a whole and driven by the nut to linearly move vertically, the screw can extend out of the upper end face of the main gear, the length of the slider body is consistent with or is even less than the height of a slider of a friction screw press with the same nominal pressure and body dimensions, the travel of the slider body can be increased by more than 100mm, the hammering energy of the slider body is correspondingly increased, and the application range can be widened obviously.

Description

A kind of electric screw press
Technical field
The invention belongs to excellent suitability for press forming equipment, be used for the production of clay brick and refractory brick and common forging part, precision die forgings.
Background technology
Have electric screw press both at home and abroad now, motor is through the one-level gear drive, be that a pinion is housed on the motor shaft, motor reaches the screw rod that connects as one with flywheel by pinion driving flywheel and rotates, and the screw rod of rotation drives the nut that is contained on the slide block makes slide block make upper and lower rectilinear motion realization forging function; Can drive simultaneously flywheel by pinion by multiple electric motors, therefore, can accomplish that specification is very large, maximum tonnage reaches 320MN in the world at present, is far longer than the tonnage of other forging equipments.See bear Xiao Hong etc., " CNC electric screw press ", forging technology, 2007, vol.32, NO.5:110-113; Zhang Yuanliang etc., " research and development of electric screw press ", forging and pressing equipment and manufacturing technology, the 1st phase: 12-14 in 2008; Forging and pressing association of Chinese Mechanical Engineering Society compiles, the 4th piece of chapter 3 electric screw press of forging and pressing handbook the 3rd volume, China Machine Press, 1993:459-467.
The nut of this electric screw press is the centre bore that is fixed on entablature from traditional friction press, change into being made of one of slide block and do, lower straight-line parts, because its length dimension of slide block with nut rises appreciably, thereby, the friction press identical with nominal pressure and fuselage size compared, its ram travel generally all reduces to some extent, and then cause the hammering energy of slide block also to reduce thereupon, therefore, the die forging production of this electric screw press metal forging that generally height dimension is less for horizontal projected area is large, the ram travel that is difficult to meet the demands is long, the large clay brick in dress modular space and refractory brick compressing, and the die-forging forming of the larger metal forging of height dimension.
Summary of the invention
The invention provides a kind of electric screw press, solve the problem that the existing existing slide block length dimension of electric screw press is long, ram travel is less, be used for clay brick, refractory brick is compressing and height dimension is larger metal die forging shaping.
A kind of electric screw press of the present invention, comprise entablature top board, left plate, right plate, sill base plate, gear wheel, nut, screw rod, slide body, eject cylinder, left motor, right motor, front brake cylinder, rear brake cylinder, it is characterized in that:
Described fuselage is tower structure, connected and composed by entablature top board, left plate, right plate, sill base plate, the upper and lower part is fixed with respectively upper plate and lower plate in the described fuselage, be fixed with left inside side plate, right inside side plate between described upper plate and the lower plate, fix left front guide rail, left back guide rail on the left inside side plate, fix right front guide rail, right back guide rail on the right inside side plate;
The centre of described entablature top board and upper plate is fixed with nut seat, nut cooperates by upper Plane Ball bearing, lower plane ball bearing with nut seat, described gear wheel is fixed in the nut upper end, and blind flange is fixed in the nut lower end, and upper and lower Plane Ball bearing is spacing;
Described screw rod epimere has external screw thread, hypomere is cylinder, and the screw rod epimere cooperates with nut thread, and the screw rod hypomere inserts in the centre bore of slide body, is fixed by screw and slide body by 2 semicircular ring fixed heads; The slide body front, rear, left and right are slidingly matched with left front, left back, right front, right back guide rail respectively, and the slide body lower surface is fixed with the slide block cushion block;
The lower plate upper surface is fixed with the workbench backing plate in the described fuselage, and the centre of lower plate and workbench backing plate has through hole coaxial and that be communicated with; Be fixed with on the sill base plate in the described fuselage and eject cylinder, the push rod that ejects cylinder is positioned at described through hole;
Described left and right motor is fixed on respectively the right and left of entablature cover top surface by left socle, right support, described left and right motor shaft is connected with left and right pinion shaft respectively, and left and right pinion meshes with described gear wheel respectively;
Described forward and backward brake cylinder is fixed on respectively the both sides, front and back of entablature cover top surface by forward and backward support, front brake block, rear brake block are connected respectively on the knock-pin of described forward and backward brake cylinder.
Described electric screw press, in the described fuselage, the nut seat both sides can be fixed with respectively symmetrical left piston cylinder, right piston-cylinder between described entablature top board and the upper plate, and the left piston bar of left and right piston-cylinder, right piston-rod lower end are hinged by the left cantilever on pivot pin and the slide body, right cantilever respectively.
When producing clay brick or refractory brick or metal forging, the course of work of the present invention is: punch or first die are installed on the slide block backing plate, lower cavity die is installed on the workbench backing plate;
Be in the upper limit position of forcing press when punch or first die, and the push rod that ejects cylinder is when being in the lower position, with clay, refractory material or the metal stock that heats place in the lower cavity die, start forcing press, front, when rear brake block unclamps, left, right motor is by left, right pinion drives gear wheel and the nut rotation that is connected, the nut drive screw of rotation and slide body and slide block backing plate are done accelerated motion downwards, when motor reaches the predetermined desired rotating speed of hammering energy, the energy that utilizes gear wheel and nut to store does work by punch or first die, making clay or formed refractory in the lower cavity die is clay brick or refractory brick, or metal stock is configured as the metal forging; After gear wheel and nut release energy; left and right motor drives gear wheel and nut counter-rotating by left and right pinion immediately; then drive screw rod and slide body and the backhaul of slide block backing plate behind the upper limit position of forcing press; left and right motor enters on-position; compressed air in the forward and backward brake cylinder promotes respectively forward and backward brake block with gear wheel and nut braking; when punch or first die with slide body and the backhaul of slide block backing plate during to upper limit position; eject the cylinder upward stroke and by push rod the brick in the lower cavity die or forging are ejected, a course of work finishes.
Left and right piston-cylinder consists of weight balancing system, its course of work is, when screw rod and slide body and slide block backing plate during to down stroke, it is descending that the left and right cantilever that is fixed in the left and right both sides of slide body spurs respectively left and right piston rod, then spur the descent of piston in the left and right piston-cylinder, the compressed air in the left and right piston-cylinder cavity of resorption is pushed back air accumulator; When screw rod and slide body and the backhaul of slide block backing plate, by left and right cantilever, left and right piston rod drives respectively the piston upward stroke in the left and right piston-cylinder, compressed air in the air accumulator enters the cavity of resorption of left and right piston-cylinder, play the effect of the weight of balance screw rod, slide body and slide block backing plate, both be conducive to accelerate opening speed, be conducive to again reduce the contact frictional resistance of screw rod and nut.
With existing through the gear-driven electric screw press of one-level relatively, electric screw press of the present invention, its nut are connected with gear wheel and are fastened as a whole and rotate under pinion drives; Screw rod and slide body connect as one under the driving of the nut of rotation and make upper and lower rectilinear motion, screw rod can protrude upward on the upper surface of nut and gear wheel, namely stretch out on the fuselage entablature, and the length dimension of slide body can unanimously even also shorten to some extent with the slide block height dimension of the friction press of identical nominal pressure and fuselage size, therefore, its slide body stroke can increase more than the 100mm, and the also corresponding increase of the hammering energy of slide body can significantly enlarge its range of application.
Description of drawings
Fig. 1 is the embodiments of the invention front view;
Fig. 2 is the embodiments of the invention top view;
Fig. 3 is the A-A cutaway view of Fig. 1;
Fig. 4 is the B-B cutaway view of Fig. 2.
The specific embodiment
Such as Fig. 1~shown in Figure 4, embodiments of the invention comprise entablature top board 6, left plate 18, right plate 24, sill base plate 19, gear wheel 3, nut 7, screw rod 8, slide body 15, eject cylinder 20, left motor 1, right motor 32, front brake cylinder 38, rear brake cylinder 40;
Described fuselage is tower structure, connected and composed by entablature top board 6, left plate 18, right plate 24, sill base plate 19, the upper and lower part is fixed with respectively upper plate 29 and lower plate 22 in the described fuselage, be fixed with left inside side plate 17, right inside side plate 25 between described upper plate 29 and the lower plate 22, fix left front guide rail 34, left back guide rail 35 on the left inside side plate 17, fix right front guide rail 36, right back guide rail 37 on the right inside side plate 25;
The centre of described entablature top board 6 and upper plate 29 is fixed with nut seat 30, nut 7 cooperates by upper Plane Ball bearing 5, lower plane ball bearing 10 with nut seat 30, described gear wheel 3 is fixed in nut 7 upper ends, blind flange 11 is fixed in nut 7 lower ends, and upper and lower Plane Ball bearing is spacing;
Described screw rod 8 epimeres have external screw thread, hypomere is cylinder, screw rod epimere and nut 7 threaded engagement, and the screw rod hypomere inserts in the centre bore of slide body 15, and is fixing by screw and slide body 15 by 2 semicircular ring fixed heads 14; Slide body 15 front, rear, left and right are slidingly matched with left front, left back, right front, right back guide rail respectively, and slide body 15 lower surfaces are fixed with slide block cushion block 16;
Lower plate 22 upper surfaces are fixed with workbench backing plate 23 in the described fuselage, and the centre of lower plate 22 and workbench backing plate 23 has through hole coaxial and that be communicated with; Be fixed with on the sill base plate 19 in the described fuselage and eject cylinder 20, the push rod 21 that ejects cylinder 20 is positioned at described through hole;
Described left and right motor is fixed on respectively the right and left of entablature cover top surface by left socle 2, right support 33, described left and right motor shaft is connected with left and right pinion shaft respectively, and left pinion 4, right pinion 31 mesh with described gear wheel 3 respectively;
Described forward and backward brake cylinder is fixed on respectively the both sides, front and back of entablature cover top surface by forward and backward support, front brake block 39, rear brake block 41 are connected respectively on the knock-pin of described forward and backward brake cylinder.
In the described fuselage, nut seat 30 both sides can be fixed with respectively symmetrical left piston cylinder 9, right piston-cylinder 28 between described entablature top board 6 and the upper plate 29, and the left piston bar 12 of left and right piston-cylinder, right piston rod 27 lower ends are hinged by the left cantilever 13 on pivot pin and the slide body 15, right cantilever 26 respectively.

Claims (2)

1. electric screw press, comprise entablature top board (6), left plate (18), right plate (24), sill base plate (19), gear wheel (3), nut (7), screw rod (8), slide body (15), eject cylinder (20), left motor (1), right motor (32), front brake cylinder (38), rear brake cylinder (40), it is characterized in that:
Described fuselage is tower structure, by entablature top board (6), left plate (18), right plate (24), sill base plate (19) connects and composes, on in the described fuselage, the bottom is fixed with respectively upper plate (29) and lower plate (22), be fixed with left inside side plate (17) between described upper plate (29) and the lower plate (22), right inside side plate (25), the upper fixing left front guide rail (34) of left inside side plate (17), left back guide rail (35), the upper fixing right front guide rail (36) of right inside side plate (25), right back guide rail (37);
The centre of described entablature top board (6) and upper plate (29) is fixed with nut seat (30), nut (7) cooperates by upper Plane Ball bearing (5), lower plane ball bearing (10) with nut seat (30), described gear wheel (3) is fixed in nut (7) upper end, blind flange (11) is fixed in nut (7) lower end, and upper and lower Plane Ball bearing is spacing;
Described screw rod (8) epimere has external screw thread, hypomere is cylinder, screw rod epimere and nut (7) threaded engagement, the screw rod hypomere inserts in the centre bore of slide body (15), and is fixing by screw and slide body (15) by 2 semicircular ring fixed heads (14); Slide body (15) front, rear, left and right are slidingly matched with left front, left back, right front, right back guide rail respectively, and slide body (15) lower surface is fixed with slide block cushion block (16);
Lower plate (22) upper surface is fixed with workbench backing plate (23) in the described fuselage, and the centre of lower plate (22) and workbench backing plate (23) has through hole coaxial and that be communicated with; Be fixed with on the sill base plate (19) in the described fuselage and eject cylinder (20), the push rod (21) that ejects cylinder (20) is positioned at described through hole;
Described left and right motor is fixed on respectively the right and left of entablature cover top surface by left socle (2), right support (33), described left and right motor shaft is connected with left and right pinion shaft respectively, and left and right pinion meshes with described gear wheel (3) respectively;
Described forward and backward brake cylinder is fixed on respectively the both sides, front and back of entablature cover top surface by forward and backward support, the front brake block (39) that is connected respectively on the knock-pin of described forward and backward brake cylinder, rear brake block (41).
2. electric screw press as claimed in claim 1 is characterized in that:
In the described fuselage, nut seat (30) both sides are fixed with respectively symmetrical left piston cylinder (9), right piston-cylinder (28) between described entablature top board (6) and the upper plate (29), and the left piston bar (12) of left and right piston-cylinder, right piston rod (27) lower end are hinged by the left cantilever (13) on pivot pin and the slide body (15), right cantilever (26) respectively.
CN201110276605XA 2011-09-16 2011-09-16 Electric screw press CN102990957A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201110276605XA CN102990957A (en) 2011-09-16 2011-09-16 Electric screw press

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201110276605XA CN102990957A (en) 2011-09-16 2011-09-16 Electric screw press

Publications (1)

Publication Number Publication Date
CN102990957A true CN102990957A (en) 2013-03-27

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Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104129092A (en) * 2014-07-31 2014-11-05 浙江立鑫高温耐火材料有限公司 Pressing mould for annular refractory brick
CN104309155A (en) * 2014-08-29 2015-01-28 合肥海德数控液压设备有限公司 Workbench for hydraulic press
CN104527116A (en) * 2014-11-07 2015-04-22 重庆麦斯特精密机械有限公司 Electronically controlled high-load material pressing machine
CN104841832A (en) * 2015-06-15 2015-08-19 周末 Hydraulic forging device used for forging metal device
CN105057533A (en) * 2015-08-12 2015-11-18 曹立新 Combined forging and pressing device
CN105081164A (en) * 2015-08-12 2015-11-25 曹立新 Method for achieving flash-free forging of blank of automotive front axle I beam
CN105081157A (en) * 2015-08-12 2015-11-25 曹立新 Flange-free forging method of heavy-duty car balance shaft
CN105081161A (en) * 2015-08-12 2015-11-25 曹立新 Method for achieving flash-free forging of forging blank of steering knuckle
CN105081160A (en) * 2015-08-12 2015-11-25 曹立新 Method for realizing non-flange forging of flange yoke forging blank
CN105081163A (en) * 2015-08-12 2015-11-25 曹立新 Method for achieving flash-free forging of forging blank
CN105081162A (en) * 2015-08-12 2015-11-25 曹立新 Method for achieving non-flash forging of universal joint fork forging blanks
CN105127343A (en) * 2015-08-12 2015-12-09 曹立新 Flash-free forging method of cylinder lug
CN105500749A (en) * 2016-01-22 2016-04-20 温州市欧起机械设备有限公司 Novel die equipment adopting thread transmission
CN105599332A (en) * 2016-01-22 2016-05-25 温州市欧起机械设备有限公司 Die manufacturing device convenient to maintain
CN105619859A (en) * 2016-01-22 2016-06-01 温州市欧起机械设备有限公司 Lockable transmission mold manufacturing device
CN105690855A (en) * 2016-01-22 2016-06-22 温州市欧起机械设备有限公司 Solar-powered mould manufacturing equipment
CN105690834A (en) * 2016-01-22 2016-06-22 温州市欧起机械设备有限公司 Power failure-preventing mould manufacturing equipment
CN105690832A (en) * 2016-01-22 2016-06-22 余苏祥 Mould manufacturing device driven by means of screw-thread fit
CN106142642A (en) * 2015-04-07 2016-11-23 合肥海德数控液压设备有限公司 Superplastic forming hydraulic press has the multidirectional moving workbench device of complex function
CN106311949A (en) * 2016-10-28 2017-01-11 青岛格林特环保设备有限公司 Electric screw oil hydraulic press adopting composite oil cylinders for maintaining pressure
WO2017025030A1 (en) * 2015-08-12 2017-02-16 曹立新 Combined forging and stamping device
CN106965480A (en) * 2017-04-05 2017-07-21 孙立民 A kind of mechanical seal filler automatic compacting device
CN109732967A (en) * 2018-12-27 2019-05-10 西安交通大学 The adjustable two motor drivens toggle link large-tonnage alternating current servo press of height of packing compact

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Publication number Priority date Publication date Assignee Title
EP0167987A2 (en) * 1984-07-10 1986-01-15 SMS HASENCLEVER Maschinenfabrik GmbH Screw press
CN2625140Y (en) * 2003-05-23 2004-07-14 华中科技大学 Electric helical press
CN201158151Y (en) * 2008-01-23 2008-12-03 淄博桑德机械设备有限公司 Electric program controlled worm gear press
CN101474888A (en) * 2009-01-20 2009-07-08 山东理工大学 Numerical control method for accurate striking of screw press
CN201456407U (en) * 2009-07-14 2010-05-12 十堰海岚机床有限公司 Servo press machine
CN201566144U (en) * 2009-11-06 2010-09-01 山东理工大学 Clutch type numerical control screw press
CN201712195U (en) * 2010-06-30 2011-01-19 青岛聚鑫锻压机械有限公司 Dual-drive electric screw press
CN102126302A (en) * 2011-04-08 2011-07-20 王一多 Electronic screw press

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0167987A2 (en) * 1984-07-10 1986-01-15 SMS HASENCLEVER Maschinenfabrik GmbH Screw press
CN2625140Y (en) * 2003-05-23 2004-07-14 华中科技大学 Electric helical press
CN201158151Y (en) * 2008-01-23 2008-12-03 淄博桑德机械设备有限公司 Electric program controlled worm gear press
CN101474888A (en) * 2009-01-20 2009-07-08 山东理工大学 Numerical control method for accurate striking of screw press
CN201456407U (en) * 2009-07-14 2010-05-12 十堰海岚机床有限公司 Servo press machine
CN201566144U (en) * 2009-11-06 2010-09-01 山东理工大学 Clutch type numerical control screw press
CN201712195U (en) * 2010-06-30 2011-01-19 青岛聚鑫锻压机械有限公司 Dual-drive electric screw press
CN102126302A (en) * 2011-04-08 2011-07-20 王一多 Electronic screw press

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104129092A (en) * 2014-07-31 2014-11-05 浙江立鑫高温耐火材料有限公司 Pressing mould for annular refractory brick
CN104309155A (en) * 2014-08-29 2015-01-28 合肥海德数控液压设备有限公司 Workbench for hydraulic press
CN104309155B (en) * 2014-08-29 2016-04-20 合肥海德数控液压设备有限公司 Hydraulic press workbench
CN104527116A (en) * 2014-11-07 2015-04-22 重庆麦斯特精密机械有限公司 Electronically controlled high-load material pressing machine
CN106142642A (en) * 2015-04-07 2016-11-23 合肥海德数控液压设备有限公司 Superplastic forming hydraulic press has the multidirectional moving workbench device of complex function
CN104841832A (en) * 2015-06-15 2015-08-19 周末 Hydraulic forging device used for forging metal device
CN104841832B (en) * 2015-06-15 2017-02-08 吴丽清 Motor forging device used for forging metal device
CN105057533A (en) * 2015-08-12 2015-11-18 曹立新 Combined forging and pressing device
CN105081164A (en) * 2015-08-12 2015-11-25 曹立新 Method for achieving flash-free forging of blank of automotive front axle I beam
CN105081163A (en) * 2015-08-12 2015-11-25 曹立新 Method for achieving flash-free forging of forging blank
CN105081162A (en) * 2015-08-12 2015-11-25 曹立新 Method for achieving non-flash forging of universal joint fork forging blanks
CN105127343A (en) * 2015-08-12 2015-12-09 曹立新 Flash-free forging method of cylinder lug
CN105081157A (en) * 2015-08-12 2015-11-25 曹立新 Flange-free forging method of heavy-duty car balance shaft
CN105081161A (en) * 2015-08-12 2015-11-25 曹立新 Method for achieving flash-free forging of forging blank of steering knuckle
CN105081160A (en) * 2015-08-12 2015-11-25 曹立新 Method for realizing non-flange forging of flange yoke forging blank
WO2017025030A1 (en) * 2015-08-12 2017-02-16 曹立新 Combined forging and stamping device
CN105690855A (en) * 2016-01-22 2016-06-22 温州市欧起机械设备有限公司 Solar-powered mould manufacturing equipment
CN105690834A (en) * 2016-01-22 2016-06-22 温州市欧起机械设备有限公司 Power failure-preventing mould manufacturing equipment
CN105690832A (en) * 2016-01-22 2016-06-22 余苏祥 Mould manufacturing device driven by means of screw-thread fit
CN105599332A (en) * 2016-01-22 2016-05-25 温州市欧起机械设备有限公司 Die manufacturing device convenient to maintain
CN105500749A (en) * 2016-01-22 2016-04-20 温州市欧起机械设备有限公司 Novel die equipment adopting thread transmission
CN105619859A (en) * 2016-01-22 2016-06-01 温州市欧起机械设备有限公司 Lockable transmission mold manufacturing device
CN106311949A (en) * 2016-10-28 2017-01-11 青岛格林特环保设备有限公司 Electric screw oil hydraulic press adopting composite oil cylinders for maintaining pressure
CN106311949B (en) * 2016-10-28 2018-01-09 青岛格林特环保设备有限公司 Composite oil cylinder protective voltage type electric screw hydraulic press
CN106965480A (en) * 2017-04-05 2017-07-21 孙立民 A kind of mechanical seal filler automatic compacting device
CN106965480B (en) * 2017-04-05 2018-12-04 重庆欣卓铸业有限公司 A kind of mechanical seal filler automatic compacting device
CN109732967A (en) * 2018-12-27 2019-05-10 西安交通大学 The adjustable two motor drivens toggle link large-tonnage alternating current servo press of height of packing compact

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Application publication date: 20130327