CN103381487A - Semi-automatic back-tool lathe with lead linkage between central carriage and molding tool rest - Google Patents

Semi-automatic back-tool lathe with lead linkage between central carriage and molding tool rest Download PDF

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Publication number
CN103381487A
CN103381487A CN2013103131024A CN201310313102A CN103381487A CN 103381487 A CN103381487 A CN 103381487A CN 2013103131024 A CN2013103131024 A CN 2013103131024A CN 201310313102 A CN201310313102 A CN 201310313102A CN 103381487 A CN103381487 A CN 103381487A
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CN
China
Prior art keywords
balladeur train
center
helical pitch
lathe
forming cutter
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CN2013103131024A
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CN103381487B (en
Inventor
邓道彬
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FOSHAN SHUNDE JUNLIAN HONGHUI MACHINERY MANUFACTURE Co Ltd
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FOSHAN SHUNDE JUNLIAN HONGHUI MACHINERY MANUFACTURE Co Ltd
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Priority to CN201310313102.4A priority Critical patent/CN103381487B/en
Publication of CN103381487A publication Critical patent/CN103381487A/en
Application granted granted Critical
Publication of CN103381487B publication Critical patent/CN103381487B/en
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Abstract

The invention relates to a semi-automatic back-tool lathe with lead linkage between a central carriage and a molding tool rest, which comprises a lathe body, a spindle head fork, a tailstock ejector pin, the central carriage and a rough blank tool rest, wherein the molding tool rest is mounted at the rear end, on the side opposite to the central carriage, of the lathe body; the central carriage is glidingly seated at the front end of the lathe body via a central sliding assembly; an oil cylinder capable of driving the central sliding assembly to slide along a slide rail is fixed on one side of the lathe body; a lifting assembly is mounted at the rear end of the lathe body; a guide rail base is connected onto the lifting assembly; a guide rail extending in the direction of the front and rear end of the lathe body is arranged on the guide rail base; a tool rest backup plate is seated on the guide rail; the molding tool rest is mounted on the tool rest backup plate in an inclined manner; a lead slide rail is fixed on the tool rest backup plate on one side of the molding tool rest; the carriage extends towards the lead slide rail to form a lead support arm; the lead support arm is glidingly connected with the lead slide rail via a lead slide base; the semi-automatic back-tool lathe is simple and reasonable in structure, can realize synchronous turning of rough turning and finish turning by virtue of a mechanical structure, is stable in structure and high in machining precision.

Description

The semi-automatic back knife lathe of a kind of center balladeur train and the interlock of forming cutter rest helical pitch
Technical field
The present invention relates to a kind of semi-automatic back knife lathe technical field, the semi-automatic back knife lathe of especially a kind of center balladeur train and the interlock of forming cutter rest helical pitch.
Background technology
At present, the forming cutter rest of semi-automatic back knife lathe and center balladeur train operated by rotary motion have independent dynamical system to control, and the crude green body knife rest is arranged on the balladeur train of center, when workpiece rotates, the center balladeur train slides along the workpiece bearing of trend, and the crude green body knife rest carries out rough turn for the first time to workpiece, simultaneously, forming cutter rest carries out moulding turning immediately following the back, thereby completed the turning process of workpiece, this structure is owing to existing two to overlap independently feed arrangement, and its synchronism is relatively poor, and manufacturing cost is high, complex structure.
Summary of the invention
The object of the invention is to solve above-mentioned the deficiencies in the prior art, and improve a kind of simple and reasonable for structure, low cost of manufacture, machining accuracy is high, stable performance, the semi-automatic back knife lathe that the good center balladeur train of rough turn and finish turning synchronism and forming cutter rest helical pitch link.
The technical solution adopted for the present invention to solve the technical problems is:
the semi-automatic back knife lathe of a kind of center balladeur train and the interlock of forming cutter rest helical pitch, comprise lathe bed, the lathe bed both sides are equipped with mainshaft fork and the tailstock center at clamping work pieces two ends, lathe bed front end between mainshaft fork and tailstock center is equipped with the center balladeur train, offer on the balladeur train of center and be suitable for the central hole that workpiece passes, the crude green body knife rest is installed on the balladeur train of center, the lathe bed rear end of corresponding center balladeur train opposite side is equipped with forming cutter rest, it is characterized in that, described center balladeur train slides to sit by the central slide assembly and is located at the lathe bed front end, lathe bed one side is fixed with and drives the oil cylinder that the central slide assembly slides along slide rail, the lathe bed rear end is equipped with lifting assembly, be connected with track base on lifting assembly, be provided with the guide rail that arranges along lathe bed front and back end extension on track base, slide on guide rail to sit and be provided with the knife rest backup plate, forming cutter rest is tilting and is arranged on the knife rest backup plate, be fixed with the helical pitch slide rail on the knife rest backup plate of forming cutter rest one side, the center balladeur train is extended with the helical pitch supporting arm toward helical pitch slide rail direction, the helical pitch supporting arm is slidably connected by helical pitch slide and helical pitch slide rail, when hydraulic oil cylinder driving center balladeur train slides along slide rail, helical pitch slide on the helical pitch supporting arm slides along the helical pitch slide rail, driving forming cutter rest slides along guide rail, forming cutter on forming cutter rest is cut toward the feeding of workpiece direction.
adopt the semi-automatic back knife lathe of this structure, the center balladeur train is connected into integral body with the knife rest backup plate that forming cutter rest is installed by helical pitch supporting arm and helical pitch slide rail, make the sliding feed of the molding cutter on forming cutter rest not need to install power set, save manufacturing cost, when the center balladeur train slides, slided along the helical pitch slide rail by the helical pitch slide by the helical pitch supporting arm, thereby driving forming cutter rest slides along guide rail, realize that molding cutter on forming cutter rest is to the feeding turning of workpiece processing, it is simple in structure, rationally, realize rough turn and the synchronous turning of finish turning by frame for movement, Stability Analysis of Structures, machining accuracy is high.
The present invention can also adopt following technical measures to solve:
Described central slide assembly comprises center balladeur train planker, center balladeur train planker lid, center balladeur train slide, the end face of lathe bed front end and side are fixed with respectively end face guide rail and side guide, center balladeur train slide slides to sit by end face slide block and side slide block respectively and is located on end face guide rail and side guide, center balladeur train planker is fixed on center balladeur train slide end face, center balladeur train planker lid is slidably connected on the balladeur train planker of center, and center balladeur train lifting is slidably connected on the vertical plane of center balladeur train planker lid; The connection that center balladeur train planker is connected with center balladeur train planker, make the center balladeur train realize the front and back slidable adjustment along the front and back end of lathe bed, the setting of end face guide rail and side guide, make center balladeur train slide more stable when sliding, stressed more stable, effectively improve the turning machining accuracy, the center balladeur train can also be along realizing the oscilaltion adjusting on the vertical plane of center balladeur train planker lid.
Described lifting assembly comprises lifting planker, elevator chamber, elevating screw, worm gear case, side, lathe bed rear end laterally is provided with the guide rail boss that is slidably matched with the lifting planker, elevator chamber is connected on the lifting planker by elevating screw and worm gear case slip lifting, track base is fixed on the elevator chamber top, and the lift adjustment handwheel also is installed on worm gear case; The setting of lifting assembly, can make the knife rest backup plate realize the oscilaltion adjusting, elevator chamber slip lifting is connected on the lifting planker, during adjusting, worm gear case is fixed on elevator chamber, and connect with elevating screw, only need to rotate the lift adjustment handwheel, make elevator chamber rise or descend along elevating screw, realize the oscilaltion of forming cutter rest.
Described tailstock center is arranged on lathe bed one side by tailstock, is fixed with the tailstock cylinder that drives tailstock center on tailstock; Tailstock air cylinder driven tailstock center is flexible, top tight workpiece one end.
Described lathe bed opposite side is provided with main spindle box, and the mainshaft fork is rotatably connected on main spindle box by main shaft, and the spindle motor of the main shaft other end bottom being arranged on lathe bed drives and be connected; The mainshaft fork by the connection of spindle motor, belt and belt pulley, realizes that the power output of mainshaft fork is rotated as driving shaft.
Described helical pitch supporting arm is comprised of support arm body and expansion link, and support arm body one end is connected with the center balladeur train, and the other end is provided with vertical sleeve, and expansion link is the telescopic adjustment formula and is set on vertical sleeve, and the helical pitch slide is arranged on the expansion link bottom; The effect of expansion link is the height that can regulate the helical pitch slide, adapts to the lift adjustment of knife rest backup plate.
Be fixed with the helical pitch slide rail that be arranged in parallel with forming cutter rest on the knife rest backup plate of described forming cutter rest one side; When this structure can make the helical pitch slide slide along the helical pitch slide rail, its amount of feeding can be more even, and feeding adjusting is more prone to regulate.
On lathe bed between described mainshaft fork and tailstock center, at least two material drag frame components are installed, each material supporting rack assembly comprises fixed mount, crane and lift cylinder, fixed mount is fixed on groove between mainshaft fork and tailstock center, crane is vertical configuration and is slidably connected on fixed mount, lift cylinder is arranged on the fixed mount bottom, and drives with the crane lifting and be connected; Support workpiece when this structure can realize charging has the support groove on crane.
The invention has the beneficial effects as follows:
the semi-automatic back knife lathe of a kind of center balladeur train of the present invention and the interlock of forming cutter rest helical pitch, the center balladeur train is connected into integral body with the knife rest backup plate that forming cutter rest is installed by helical pitch supporting arm and helical pitch slide rail, make the sliding feed of the molding cutter on forming cutter rest not need to install power set, save manufacturing cost, when the center balladeur train slides, slided along the helical pitch slide rail by the helical pitch slide by the helical pitch supporting arm, thereby driving forming cutter rest slides along guide rail, realize that molding cutter on forming cutter rest is to the feeding turning of workpiece processing, it is simple in structure, rationally, realize rough turn and the synchronous turning of finish turning by frame for movement, Stability Analysis of Structures, machining accuracy is high.
Description of drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of another angle of the present invention.
Fig. 3 is the structural representation of another angle of the present invention.
Fig. 4 is the structural representation of another angle of the present invention.
The specific embodiment
The present invention is further described below in conjunction with drawings and Examples.
as shown in Figures 1 to 4, the semi-automatic back knife lathe of a kind of center balladeur train and the interlock of forming cutter rest helical pitch, comprise lathe bed 1, lathe bed 1 both sides are equipped with mainshaft fork 3 and the tailstock center 4 at clamping work pieces 2 two ends, lathe bed 1 front end between mainshaft fork 3 and tailstock center 4 is equipped with center balladeur train 5, offer on center balladeur train 5 and be suitable for the central hole 501 that workpiece 2 passes, crude green body knife rest 6 is installed on center balladeur train 5, lathe bed 1 rear end of corresponding center balladeur train 5 opposite sides is equipped with forming cutter rest 7, it is characterized in that, described center balladeur train 5 slides to sit by central slide assembly 9 and is located at lathe bed 1 front end, lathe bed 1 one sides are fixed with and drive the oil cylinder 10 that central slide assembly 9 slides along lathe bed 1 front end, lathe bed 1 rear end is equipped with lifting assembly 11, be connected with track base 12 on lifting assembly 11, be provided with the guide rail 13 that arranges along lathe bed 1 front and back end extension on track base 12, slide on guide rail 13 to sit and be provided with knife rest backup plate 14, forming cutter rest 7 is tilting and is arranged on knife rest backup plate 14, be fixed with helical pitch slide rail 15 on the knife rest backup plate 14 of forming cutter rest 14 1 sides, center balladeur train 5 is extended with helical pitch supporting arm 16 toward helical pitch slide rail 15 directions, helical pitch supporting arm 16 is slidably connected by helical pitch slide 17 and helical pitch slide rail 15, when oil cylinder 10 drives center balladeur train 5 along lathe bed 1 front end slip, helical pitch slide 17 on helical pitch supporting arm 16 slides along helical pitch slide rail 15, driving forming cutter rest 7 slides along guide rail 13, forming cutter on forming cutter rest 7 is cut toward workpiece 2 direction feedings.
adopt the semi-automatic back knife lathe of this structure, center balladeur train 5 is connected into integral body with the knife rest backup plate 14 that forming cutter rest 7 is installed by helical pitch supporting arm 16 and helical pitch slide rail 15, make the sliding feed of the molding cutter on forming cutter rest 7 not need to install power set, save manufacturing cost, when center balladeur train 5 slides, slided along helical pitch slide rail 15 by helical pitch slide 17 by helical pitch supporting arm 16, thereby driving forming cutter rest 7 slides along guide rail 13, realize that molding cutter on forming cutter rest 7 is to the feeding turning of workpiece 2 processing, it is simple in structure, rationally, realize rough turn and the synchronous turning of finish turning by frame for movement, Stability Analysis of Structures, machining accuracy is high.
More specifically embodiment as the present embodiment:
described central slide assembly 9 comprises center balladeur train planker 901, center balladeur train planker lid 902, center balladeur train slide 903, the end face 101 of lathe bed 1 front end and side 102 are fixed with respectively end face guide rail 905 and side guide 906, center balladeur train slide 903 slides to sit by end face slide block 905-1 and side slide block 906-1 respectively and is located on end face guide rail 905 and side guide 906, center balladeur train planker 901 is fixed on center balladeur train slide 903 end faces, center balladeur train planker lid 902 is slidably connected on center balladeur train planker 901, balladeur train 5 liftings in center are slidably connected on the vertical plane 902-1 of center balladeur train planker lid 902, center balladeur train planker 901 is connected 902 connection with center balladeur train planker, make center balladeur train 5 realize the front and back slidable adjustment along the front and back end of lathe bed 1, the setting of end face guide rail 905 and side guide 906, make center balladeur train slide 903 more stable when sliding, stressed more stable, effectively improve the turning machining accuracy, center balladeur train 5 can also be along realizing the oscilaltion adjusting on 902 vertical plane 902-1 of center balladeur train planker lid.
Described lifting assembly 11 comprises lifting planker 1101, elevator chamber 1102, elevating screw 1103, worm gear case 1104, lathe bed 1 side, rear end laterally is provided with the guide rail boss 103 that is slidably matched with lifting planker 1101, elevator chamber 1102 is connected on lifting planker 1101 by elevating screw 1103 and worm gear case 1104 slip liftings, track base 12 is fixed on elevator chamber 1102 tops, and lift adjustment handwheel 1105 also is installed on worm gear case 1104; The setting of lifting assembly 11, can make knife rest backup plate 14 realize the oscilaltion adjusting, elevator chamber slip lifting is connected on lifting planker 1101, during adjusting, worm gear case 1104 is fixed on elevator chamber 1102, and connect with elevating screw 1103, only need to rotate lift adjustment handwheel 1105, make elevator chamber 1102 rise or descend along elevating screw 1103, realize the oscilaltion of forming cutter rest 7.
Described tailstock center 4 is arranged on lathe bed one side by tailstock 18, is fixed with the tailstock cylinder 19 that drives tailstock center 4 on tailstock 18; It is flexible that tailstock cylinder 19 drives tailstock center 4, top tight workpiece 2 one ends.
Described lathe bed 1 opposite side is provided with main spindle box 20, and mainshaft fork 3 is rotatably connected on main spindle box 20 by main shaft 21, and main shaft 20 other ends are connected with spindle motor 22 drivings that are arranged on lathe bed 1 bottom; Mainshaft fork 3 by the connection of the parts such as spindle motor 22, belt and belt pulley, realizes that the power output of mainshaft fork 3 is rotated as driving shaft.
Described helical pitch supporting arm 16 is comprised of support arm body 1601 and expansion link 1602, support arm body 1,601 one ends are connected with center balladeur train 5, the other end is provided with vertical sleeve 1603, and expansion link 1602 is the telescopic adjustment formula and is set on vertical sleeve 1603, and helical pitch slide 17 is arranged on expansion link 1602 bottoms; The effect of expansion link 1602 is the height that can regulate helical pitch slide 17, adapts to the lift adjustment of knife rest backup plate 14.
Be fixed with the helical pitch slide rail 15 that be arranged in parallel with forming cutter rest 7 on the knife rest backup plate 14 of described forming cutter rest 7 one sides; Knife rest backup plate 14 and forming cutter rest 7 are be arranged in parallel, and when helical pitch slide 17 was slided along helical pitch slide rail 15, its amount of feeding can be more even, and feeding adjusting is more prone to regulate.
On lathe bed 1 between described mainshaft fork 3 and tailstock center 4, at least two material drag frame components 23 are installed, each material supporting rack assembly 23 comprises fixed mount 2301, crane 2302 and lift cylinder 2303, fixed mount 2301 is fixed on groove 104 between mainshaft fork 3 and tailstock center 4, crane 2302 is vertical configuration and is slidably connected on fixed mount 2301, lift cylinder 2303 is arranged on fixed mount 2301 bottoms, and drives with crane 2302 liftings and be connected; Support workpiece 2 when this structure can realize charging has support groove 2302-1 on crane 2302, be used for support workpiece 2.
Described crude green body knife rest 6 is arranged on a side of center balladeur train 5, and forming cutter rest 7 is arranged on the opposite side of center balladeur train 5, and in center balladeur train 5 sliding processes, at first workpiece 2 is cut by crude green body knife rest 6, then is whittled into type by forming cutter rest 7 immediately following carrying out essence thereafter.
Described central hole 501 can be installed bearing, in center balladeur train 5 sliding processes, contacts auxiliary rotary with workpiece 2.
Above-described specific embodiment only is preferred embodiment of the present invention, and the equivalent arrangements of such as doing according to the present patent application the scope of the claims all should be technology of the present invention and contains.

Claims (8)

1. the semi-automatic back knife lathe of a center balladeur train and forming cutter rest helical pitch interlock, comprise lathe bed (1), lathe bed (1) both sides are equipped with mainshaft fork (3) and the tailstock center (4) at clamping work pieces (2) two ends, lathe bed (1) front end between mainshaft fork (3) and tailstock center (4) is equipped with center balladeur train (5), offer on center balladeur train (5) and be suitable for the central hole (501) that workpiece (2) passes, crude green body knife rest (6) is installed on center balladeur train (5), lathe bed (1) rear end of corresponding center balladeur train (5) opposite side is equipped with forming cutter rest (7), it is characterized in that, described center balladeur train (5) slides to sit by central slide assembly (9) and is located at lathe bed (1) front end, lathe bed (1) one side is fixed with and drives the oil cylinder (10) that central slide assembly (9) slides along lathe bed (1) front end, lathe bed (1) rear end is equipped with lifting assembly (11), be connected with track base (12) on lifting assembly (11), be provided with the guide rail (13) that arranges along lathe bed (1) front and back end extension on track base (12), the upper seat that slides of guide rail (13) is provided with knife rest backup plate (14), forming cutter rest (7) is tilting and is arranged on knife rest backup plate (14), be fixed with helical pitch slide rail (15) on the knife rest backup plate (14) of forming cutter rest (14) one sides, center balladeur train (5) is extended with helical pitch supporting arm (16) toward helical pitch slide rail (15) direction, helical pitch supporting arm (16) is slidably connected by helical pitch slide (17) and helical pitch slide rail (15), when oil cylinder (10) driving center balladeur train (5) slides along lathe bed (1) front end, helical pitch slide (17) on helical pitch supporting arm (16) slides along helical pitch slide rail (15), driving forming cutter rest (7) slides along guide rail (13), forming cutter on forming cutter rest (7) is cut toward workpiece (2) direction feeding.
according to claim 1 center balladeur train and forming cutter rest helical pitch the interlock semi-automatic back knife lathe, it is characterized in that, described central slide assembly (9) comprises center balladeur train planker (901), center balladeur train planker lid (902), center balladeur train slide (903), the end face (101) of lathe bed (1) front end and side (102) are fixed with respectively end face guide rail (905) and side guide (906), center balladeur train slide (903) slides to sit by end face slide block (905-1) and side slide block (906-1) respectively and is located on end face guide rail (905) and side guide (906), center balladeur train planker (901) is fixed on center balladeur train slide (903) end face, center balladeur train planker lid (902) is slidably connected on center balladeur train planker (901), center balladeur train (5) lifting is slidably connected on the vertical plane (902-1) of center balladeur train planker lid (902).
according to claim 1 center balladeur train and forming cutter rest helical pitch the interlock semi-automatic back knife lathe, it is characterized in that, described lifting assembly (11) comprises lifting planker (1101), elevator chamber (1102), elevating screw (1103), worm gear case (1104), lathe bed (1) side, rear end laterally is provided with the guide rail boss (103) that is slidably matched with lifting planker (1101), elevator chamber (1102) is connected on lifting planker (1101) by elevating screw (1103) and worm gear case (1104) slip lifting, track base (12) is fixed on elevator chamber (1102) top, lift adjustment handwheel (1105) also is installed on worm gear case (1104).
According to claim 1 center balladeur train and forming cutter rest helical pitch the interlock semi-automatic back knife lathe, it is characterized in that, described tailstock center (4) is arranged on lathe bed one side by tailstock (18), is fixed with the tailstock cylinder (19) that drives tailstock center (4) on tailstock (18).
According to claim 1 center balladeur train and forming cutter rest helical pitch the interlock semi-automatic back knife lathe, it is characterized in that, described lathe bed (1) opposite side is provided with main spindle box (20), mainshaft fork (3) is rotatably connected on main spindle box (20) by main shaft (21), and the spindle motor (22) of main shaft (20) other end bottom being arranged on lathe bed (1) drives and be connected.
According to claim 1 center balladeur train and forming cutter rest helical pitch the interlock semi-automatic back knife lathe, it is characterized in that, described helical pitch supporting arm (16) is comprised of support arm body (1601) and expansion link (1602), support arm body (1601) one ends are connected with center balladeur train (5), the other end is provided with vertical sleeve (1603), expansion link (1602) is the telescopic adjustment formula and is set on vertical sleeve (1603), and helical pitch slide (17) is arranged on expansion link (1602) bottom.
according to claim 1 center balladeur train and forming cutter rest helical pitch the interlock semi-automatic back knife lathe, it is characterized in that, on lathe bed (1) between described mainshaft fork (3) and tailstock center (4), at least two material drag frame components (23) are installed, each material supporting rack assembly (23) comprises fixed mount (2301), crane (2302) and lift cylinder (2303), fixed mount (2301) is fixed on groove (104) between mainshaft fork (3) and tailstock center (4), crane (2302) is vertical configuration and is slidably connected on fixed mount (2301), lift cylinder (2303) is arranged on fixed mount (2301) bottom, and be connected with crane (2302) lifting driving.
According to claim 1 center balladeur train and forming cutter rest helical pitch the interlock semi-automatic back knife lathe, it is characterized in that, be fixed with the helical pitch slide rail (15) that be arranged in parallel with forming cutter rest 7 on the knife rest backup plate (14) of described forming cutter rest (7) one sides.
CN201310313102.4A 2013-07-24 2013-07-24 Semi-automatic back-tool lathe with lead linkage between central carriage and molding tool rest Active CN103381487B (en)

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Publication number Priority date Publication date Assignee Title
CN103737025A (en) * 2013-12-26 2014-04-23 上海通实机床制造有限公司 Numerically-controlled machine tool for machining sheet work-pieces
CN103801715A (en) * 2014-02-12 2014-05-21 杭州方兴表业有限公司 Inverted type knife rest component
CN107900794A (en) * 2017-11-17 2018-04-13 江门市江海区杰能机电科技有限公司 The workbench of double face abrading machine

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CN102886532A (en) * 2011-07-22 2013-01-23 宁波北仑立洲自动化机械制造有限公司 Efficient semi-automatic lathe
CN203448676U (en) * 2013-07-24 2014-02-26 佛山市顺德区俊联鸿徽机械制造有限公司 Semi-automatic back knife lathe with central sliding frame in linkage with forming tool rest lead

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Publication number Priority date Publication date Assignee Title
US20050034575A1 (en) * 2003-08-15 2005-02-17 Hsuan-Lung Wu Turret lathe with a clutch for operating between chambering and turninig operation modes
CN2813242Y (en) * 2005-07-22 2006-09-06 陈子初 Linked feeding system for woodworking turning mill
CN2930927Y (en) * 2006-08-18 2007-08-08 中山市正洲汽门有限公司 Automatic processing lathe
JP2008093808A (en) * 2006-10-16 2008-04-24 Tsugami Corp Lathe
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103737025A (en) * 2013-12-26 2014-04-23 上海通实机床制造有限公司 Numerically-controlled machine tool for machining sheet work-pieces
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CN103801715B (en) * 2014-02-12 2019-06-25 杭州方兴表业有限公司 A kind of inverted cutter holder assembly
CN107900794A (en) * 2017-11-17 2018-04-13 江门市江海区杰能机电科技有限公司 The workbench of double face abrading machine

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Denomination of invention: Semi-automatic back-tool lathe with lead linkage between central carriage and molding tool rest

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