CN108406405A - A kind of cylindric part doffer one by one - Google Patents

A kind of cylindric part doffer one by one Download PDF

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Publication number
CN108406405A
CN108406405A CN201810385364.4A CN201810385364A CN108406405A CN 108406405 A CN108406405 A CN 108406405A CN 201810385364 A CN201810385364 A CN 201810385364A CN 108406405 A CN108406405 A CN 108406405A
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CN
China
Prior art keywords
blanking
cylindric part
cylindric
ring
doffer
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CN201810385364.4A
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Chinese (zh)
Other versions
CN108406405B (en
Inventor
张锴
彭志平
黄玮文
黄其仁
黄天财
王平江
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Quanzhou Huazhong University Of Science And Technology Institute Of Manufacturing
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Quanzhou Huazhong University Of Science And Technology Institute Of Manufacturing
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Priority to CN201810385364.4A priority Critical patent/CN108406405B/en
Publication of CN108406405A publication Critical patent/CN108406405A/en
Application granted granted Critical
Publication of CN108406405B publication Critical patent/CN108406405B/en
Active legal-status Critical Current
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q7/00Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q7/00Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting
    • B23Q7/10Arrangements for handling work specially combined with or arranged in, or specially adapted for use in connection with, machine tools, e.g. for conveying, loading, positioning, discharging, sorting by means of magazines

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Catching Or Destruction (AREA)
  • Feeding Of Articles To Conveyors (AREA)

Abstract

The present invention discloses a kind of cylindric part doffer one by one, including workbench, delivery device on the table and the blanking mechanism below delivery device are installed, blanking mechanism includes the material-falling hopper of rounding mesa-shaped, material-falling hopper includes the blanking ring and the more elastic guide pieces in horn-like distribution being located at below blanking ring for being fixed on workbench bottom, each elastic guide piece surrounds a material chamber for accepting cylindric part, and the lower end of each elastic guide piece is formed with the distensible blanking birdsmouth for blanking, the internal diameter of blanking ring is more than the outer diameter of cylindric part, the green diameter size of blanking birdsmouth is advisable with the outer diameter no more than cylindric part, the position that workbench corresponds to material-falling hopper offers blanking opening.A kind of cylindric part of present invention doffer one by one can ensure part blanking in an orderly manner one by one, while save manpower.

Description

A kind of cylindric part doffer one by one
Technical field
The present invention relates to part processing technique fields, and in particular to be a kind of cylindric part doffer one by one.
Background technology
Cylindric part is one of the typical part frequently encountered in Hardware fitting, it is mainly used to bearing transmission zero Part transmits torque and bears load, is generally made of the external cylindrical surface of concentric shafts, endoporus and corresponding end face, cylindric zero Part generally requires to be processed in the middle part of it or both ends in processing.Usually existing cylindric part machining production line setting There is corresponding feeding equipment, ensures that cylindric part can be one by one sent into each processing unit (plant) and be processed.Cylindric part It is sent into each different manufacturing procedure to realize often through transport mechanism, but cylindric part is put on the transfer mechanism, Existing mode is usually artificial placement, while placement must keep certain spacing, which, which may require that, consumes larger people Power, and the interval placed is unable to get guarantee.
Invention content
The purpose of the present invention is to provide a kind of cylindric part doffers one by one, can ensure part one by one in an orderly manner Blanking, while saving manpower.
In order to achieve the above objectives, solution of the invention is:
A kind of cylindric part doffer, including workbench one by one, be mounted on the workbench on delivery device and Blanking mechanism below the delivery device, the blanking mechanism include the layer of rounding mesa-shaped placed for buffer level Layer heap product cylindric part material-falling hopper, the material-falling hopper include be fixed on the workbench bottom blanking ring and more The elastic guide piece in horn-like distribution below the blanking ring, the upper end of each elastic guide piece respectively with institute The bottom corresponding position for stating blanking ring is fixedly connected, and the lower end of each elastic guide piece is connected in one by a spring ring It rises so that each elastic guide piece surrounds a material chamber for accepting cylindric part, and each elastic guide piece Lower end be formed with the distensible blanking birdsmouth for blanking, the internal diameter of the blanking ring is more than the outer diameter of cylindric part, The green diameter size of the blanking birdsmouth is advisable with the outer diameter no more than cylindric part, is fallen described in the workbench correspondence The position of hopper offers blanking opening.
The elastic guide piece is evenly distributed on the lower section of the blanking ring, and the elastic guide piece includes being located at upper end It is vertically arranged along the fixed part of the blanking ring radially extended, the external cylindrical surface along cylindric part positioned at lower end Guide part and the rake being connected between the fixed part and the guide part, the rake from top to bottom move closer to Cylindric part is obliquely installed, and the wearing sleeve part for wearing the spring ring is provided on the guide part.
The spring ring is telephone wire spring ring.
The material chamber is sized to ensure that each cylindric part is deposited in the material chamber in such a way that the center of circle is aligned Inside it is advisable.
The delivery device includes that push oil cylinder and the erecting bed for fixing the push oil cylinder, the erecting bed are logical Excessive root post is mounted on the workbench.
The central axial line of the push oil cylinder and the center of the blanking ring and the center of the blanking birdsmouth are equal It is located along the same line.
The upper surface of the lower end and the cylindric part of top layer in the material-falling hopper of the push rod of the push oil cylinder Between spacing be not less than cylindric part maximum height.
The blanking mechanism further includes guide ledges, and the guide ledges correspond to the material-falling hopper mounted on the workbench Top position on, the guide ledges include mounting ring and the guiding bulge loop being convexly equipped in the mounting ring, the installation Ring and the guiding bulge loop are coaxially disposed, the common shape of annular opening on the looping pit and the mounting ring being oriented on bulge loop At for cylindric part horizontal through guide channel.
The transport mechanism being also equipped on the workbench below the material-falling hopper.
With the above structure, a kind of cylindric part of present invention doffer one by one can cache multiple layers in material-falling hopper The cylindric part of layer heap product, the lower end of each elastic guide piece are chained together by a spring ring, when pushing away for push oil cylinder When bar being sent to push downwards, the cylindric part of the bottom can be strutted spring ring by downward push active force so that blanking Birdsmouth is expanded, can be by adjusting the size of this active force, to allow the cylindric part of the bottom to be fallen out of material-falling hopper, together When the spring ring that is softened retract automatically original state, blanking birdsmouth becomes smaller therewith so that cylindric the zero of layer second from the bottom Part continues to be buffered in material-falling hopper, until push oil cylinder carries out push action next time, pushes the time interval of cylinder action It can be set according to actual needs, to ensure that the interval that cylindric part is fallen is identical.
Therefore, a kind of cylindric part of present invention doffer one by one can ensure part blanking in an orderly manner one by one, simultaneously Save manpower.
Further, the elastic guide piece is evenly distributed on the lower section of the blanking ring, can ensure the cylinder for expecting intracavitary Shape part uniform stressed, is conducive to steady blanking.
The elastic guide piece includes positioned at upper end along the fixed part of the blanking ring radially extended, positioned at lower end The vertically arranged guide part of the external cylindrical surface along cylindric part and be connected to the fixed part and the guide part it Between rake, the rake from top to bottom moves closer to cylindric part and is obliquely installed, be arranged on the guide part useful In the wearing sleeve part for wearing the spring ring.The guide part of elastic guide piece lower end has guiding role to cylindric part, can protect It when demonstrate,proving cylindric part and falling, can vertically be fallen along guide part, ensure the stability in blanking direction.
Further, the transport mechanism being also equipped on the workbench below the material-falling hopper, cylindric part from It is directly fallen in transport mechanism in material-falling hopper, and one of manufacturing procedure is transmitted to down by transport mechanism.
Further, the blanking mechanism further includes guide ledges, and the guide ledges correspond to institute mounted on the workbench It states on the top position of material-falling hopper, the guide ledges include mounting ring and the guiding bulge loop being convexly equipped in the mounting ring, The mounting ring and the guiding bulge loop are coaxially disposed, and the annular on the looping pit and the mounting ring being oriented on bulge loop is opened Mouth be collectively formed for cylindric part horizontal through guide channel, guide channel to cylindric part have guiding role, when Cylindric part slightly it is crooked enter guide channel when, after the guiding role by guide channel, it is ensured that it flatly falls Enter in material-falling hopper, to ensure being smoothed out for blanking.
Further, need the push rod of adjustment push oil cylinder to the size for pushing active force of cylindric part, to protect Demonstrate,proving cylindric part can fall from blanking birdsmouth one by one, and push active force is too small, cause spring ring to strut amplitude small, even The cylindric part of the bottom can not all break through the constraint of spring ring, cannot achieve blanking, push active force is too big, may cause Spring ring to strut amplitude excessive so that cylindric part is continuously fallen, and the purpose of blanking one by one is not achieved, therefore, in general, Spacing in the lower end of the push rod of adjustable push oil cylinder and material-falling hopper between the upper surface of the cylindric part of top layer More than the maximum height of cylindric part, to realize the adjustment for carrying out push amount of force according to different cylindric parts Purpose, ensure blanking one by one.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of cylindric part of present invention doffer one by one;
Fig. 2 be a kind of cylindric part of the present invention one by one in doffer material-falling hopper structural schematic diagram.
In figure:
1 workbench 11 of workbench
Holder 12 pushes oil cylinder 21
22 column 23 of erecting bed
3 blanking ring 31 of material-falling hopper
32 wearing sleeve part 321 of elastic guide piece
33 material chamber 34 of telephone wire spring ring
4 link 5 of Transfer pipe
Mounting ring 61 is oriented to bulge loop 62
Cylindric part 1a
Specific implementation mode
In order to further explain the technical solution of the present invention, being explained in detail the present invention below by specific embodiment It states.
A kind of cylindric part doffer one by one, as shown in Figure 1, including workbench 1, pushing away on workbench 1 It includes that workbench 11 and four are used to support work to send mechanism and the blanking mechanism below delivery device, workbench 1 The holder 12 of platform 11, each holder 12 are fixedly connected with the bottom of the corresponding corner of workbench 11.
As shown in Figure 1, delivery device includes pushing oil cylinder 21 and the erecting bed 22 for fixed push oil cylinder 21, installation Platform 22 is mounted on the top of workbench 11 by four columns 23, and push oil cylinder 21 and the fixed form of erecting bed 22 are known Fixed form, such as fixed using flange.Push oil cylinder also can be replaced other well known pushing equipments, such as cylinder.
As Figure 1-Figure 2, blanking mechanism includes the cylindric part 1a of rounding mesa-shaped placed for buffer level Material-falling hopper 3, in material-falling hopper 3, bottom of the material-falling hopper 3 including being fixed on workbench 11 is fallen cylindric part 1a layer upon layer Expect that ring 31 and the more elastic guide pieces 32 for being located at 31 lower section of blanking ring, blanking ring 31 are screwed in workbench 11 Bottom, workbench 11 correspond to material-falling hopper 3 position offer be connected to the annular opening of blanking ring 31 blanking opening (schemes In be not shown).
Elastic guide piece 32 is made of the metal material with elastic deformation ability, such as 304 stainless steels, elastic guide piece 32 include positioned at upper end along the fixed part of blanking ring 31 radially extended, positioned at lower end along the outer of cylindric part 1a Rake cylindrical surface vertically arranged guide part and be connected between fixed part and guide part, rake are gradual from top to bottom It is obliquely installed close to cylindric part 1a, the fixed part of each elastic guide piece 32 passes through the bottom of screw and blanking ring 31 respectively Corresponding position be fixedly connected, wearing sleeve part 321, a telephone wire spring ring 33 are provided on the guide part of each elastic guide piece 32 It is set in the wearing sleeve part 321 of each elastic guide piece 32 and elastic guide piece 32 is chained together so that each elastic guide Piece 32 surrounds one for accepting the horn-like material chamber 34 with a narrow upper and lower width of cylindric part 1a, therefore, material chamber 34 also with fall Expect the annular opening connection of ring 31.Expect that the depth of chamber 34 is more than the height of cylindric part 1a so that at least can in material chamber 34 Accept the cylindric part 1a of two layer upon layer.
And the lower end of each elastic guide piece 32 is formed with the distensible blanking birdsmouth for blanking, blanking ring 31 it is interior Diameter is more than the outer diameter of cylindric part 1a so that cylindric part 1a can be fallen into material chamber 34, the green diameter of blanking birdsmouth Size is advisable with the outer diameter no more than cylindric part 1a so that blanking birdsmouth can accept cylindric part 1a.Push oil The central axial line of cylinder 21 and the center of the center of blanking ring 31 and blanking birdsmouth are respectively positioned on same straight line.Each elasticity The angle of inclination (obtuse angle) of the rake of guide pin 32 is generally higher than 90 ° and is less than 150 °, by adjusting elastic guide piece 32 Material chamber 34 is sized to ensure that each cylindric part 1a accumulates in such a way that the center of circle is aligned by the angle of inclination of rake In material chamber 34.
With the above structure, a kind of cylindric part of present invention doffer one by one can cache multiple layers in material-falling hopper 3 The cylindric part 1a of layer heap product, the lower end of each elastic guide piece 32 are chained together by a telephone wire spring ring 33, when When the push rod of push oil cylinder 21 pushes downwards, the cylindric part 1a of the bottom can be by phone by downward push active force Wire spring circle 33 struts so that blanking birdsmouth is expanded, can be by adjusting the size of this push active force, to allow the bottom Cylindric part 1a is fallen out of material-falling hopper 3, while the 33 automatic retraction original state of telephone wire spring ring being softened, blanking are held Interface becomes smaller therewith so that and the cylindric part 1a of layer second from the bottom continues to be buffered in material-falling hopper 3, until push oil cylinder 21 Push rod carries out push action next time, and the time interval that push oil cylinder 21 acts can be set according to actual needs, from And ensure that the interval that cylindric part 1a is fallen is identical.The guide part of 32 lower end of elastic guide piece, which has cylindric part 1a, leads To effect, it is ensured that when cylindric part 1a is fallen, can vertically be fallen along guide part, ensure the stability in blanking direction.
Therefore, a kind of cylindric part of present invention doffer one by one can ensure part blanking in an orderly manner one by one, simultaneously Save manpower.
Further, elastic guide piece 32 is evenly distributed on the lower section of blanking ring 31, can ensure to expect cylindric in chamber 34 Part 1a uniform stresseds, are conducive to steady blanking.
Further, as shown in Figure 1, being also equipped with the Transfer pipe 4 positioned at 3 lower section of material-falling hopper on workbench 1, Transfer pipe 4 are fixed on by a link 5 on holder 12, and cylindric part 1a can be directly fallen on Transfer pipe 4 from material-falling hopper 3, and One of manufacturing procedure is transmitted to down by Transfer pipe 4.
Further, as Figure 1-Figure 2, blanking mechanism further includes guide ledges, and guide ledges are mounted on workbench 11 On the top position of corresponding material-falling hopper 3, guide ledges include the mounting ring 61 being fixed on workbench 11 and are convexly equipped in peace The guiding bulge loop 62 on ring 61 is filled, mounting ring 61 and guiding bulge loop 62 are coaxially disposed, have an annular opening in mounting ring 61, lead There is a looping pit to bulge loop 62, the annular opening on looping pit and mounting ring 61 being oriented on bulge loop 62 is collectively formed for cylinder Shape part 1a horizontal through guide channel, guide channel is connected to the annular opening of blanking ring 31, and guide channel is to cylindric Part 1a has guiding role, when cylindric part 1a slightly crooked entrance guide channels, in the guiding by guide channel After effect, it is ensured that it flatly falls into the material chamber 34 of material-falling hopper 3, to ensure being smoothed out for blanking.
Further, as Figure 1-Figure 2, the push rod of adjustment push oil cylinder 21 is needed to make the push of cylindric part 1a Size firmly, to ensure that cylindric part 1a can be fallen from blanking birdsmouth one by one, push active force is too small, leads to electricity Words wire spring circle 33 struts that amplitude is small, and the cylindric part 1a of the bottom can not break through the beam of telephone wire spring ring 33 Tie up, cannot achieve blanking, push active force is too big, may cause telephone wire spring ring 33 to strut amplitude excessive so that cylinder Shape part 1a is continuously fallen, and the purpose of blanking one by one is not achieved, therefore, in general, the push rod of adjustable push oil cylinder 21 Spacing between the upper surface of the cylindric part 1a of the Liao Qiang34Nei top layers of lower end and material-falling hopper 3 is more than cylindric part The maximum height of 1a is protected to realize the purpose for the adjustment for carrying out push amount of force according to different cylindric part 1a Demonstrate,prove blanking one by one.
The product form and style of above-described embodiment and schema and the non-limiting present invention, any technical field it is common The appropriate changes or modifications that technical staff does it all should be regarded as the patent category for not departing from the present invention.

Claims (9)

1. a kind of cylindric part doffer, including workbench one by one, the delivery device being mounted on the workbench and position Blanking mechanism below the delivery device, it is characterised in that:The blanking mechanism includes rounding mesa-shaped for caching water The material-falling hopper of the cylindric part of the layer upon layer of placing flat, the material-falling hopper include the blanking for being fixed on the workbench bottom Ring and more are located at the elastic guide pieces in horn-like distribution below the blanking ring, each elastic guide piece it is upper End is fixedly connected with the bottom corresponding position of the blanking ring respectively, and the lower end of each elastic guide piece passes through a spring ring It is chained together so that each elastic guide piece surrounds a material chamber for accepting cylindric part, and each bullet Property guide pin lower end be formed with the distensible blanking birdsmouth for blanking, the internal diameter of the blanking ring is more than cylindric part Outer diameter, the green diameter size of the blanking birdsmouth is advisable with the outer diameter no more than cylindric part, the workbench pair The position of the material-falling hopper is answered to offer blanking opening.
2. a kind of cylindric part according to claim 1 doffer one by one, it is characterised in that:The elastic guide piece It is evenly distributed on the lower section of the blanking ring, the elastic guide piece includes that the radial direction along the blanking ring positioned at upper end is prolonged The fixed part stretched positioned at the vertically arranged guide part of the external cylindrical surface along cylindric part of lower end and is connected to described solid Determine the rake between portion and the guide part, the rake from top to bottom moves closer to cylindric part and is obliquely installed, institute State the wearing sleeve part being provided on guide part for wearing the spring ring.
3. a kind of cylindric part according to claim 1 doffer one by one, it is characterised in that:The spring ring is electricity Talk about wire spring circle.
4. a kind of cylindric part according to claim 1 doffer one by one, it is characterised in that:The size of the material chamber It is arranged to ensure that each cylindric part is deposited in the material intracavitary in such a way that the center of circle is aligned and is advisable.
5. a kind of cylindric part according to claim 1 doffer one by one, it is characterised in that:The delivery device packet It includes push oil cylinder and the erecting bed for fixing the push oil cylinder, the erecting bed is mounted on the work by more root posts Make on platform.
6. a kind of cylindric part according to claim 5 doffer one by one, it is characterised in that:The push oil cylinder Central axial line is respectively positioned on the center of the blanking ring and the center of the blanking birdsmouth on same straight line.
7. a kind of cylindric part according to claim 5 doffer one by one, it is characterised in that:The push oil cylinder Spacing in the lower end of push rod and the material-falling hopper between the upper surface of the cylindric part of top layer is not less than cylindric The maximum height of part.
8. a kind of cylindric part according to claim 1 doffer one by one, it is characterised in that:The blanking mechanism is also Including guide ledges, the guide ledges are corresponded to mounted on the workbench on the top position of the material-falling hopper, the guiding Boss includes mounting ring and the guiding bulge loop being convexly equipped in the mounting ring, and the mounting ring and the guiding bulge loop are coaxially set Set, it is described be oriented to bulge loop on looping pit and the mounting ring on annular opening be collectively formed for cylindric part horizontal through Guide channel.
9. a kind of cylindric part according to claim 1 doffer one by one, it is characterised in that:On the workbench also The transport mechanism being equipped with below the material-falling hopper.
CN201810385364.4A 2018-04-26 2018-04-26 Cylindric part doffer one by one Active CN108406405B (en)

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CN201810385364.4A CN108406405B (en) 2018-04-26 2018-04-26 Cylindric part doffer one by one

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Application Number Priority Date Filing Date Title
CN201810385364.4A CN108406405B (en) 2018-04-26 2018-04-26 Cylindric part doffer one by one

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CN108406405A true CN108406405A (en) 2018-08-17
CN108406405B CN108406405B (en) 2023-09-12

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113734500A (en) * 2021-09-10 2021-12-03 中北大学 Welding wire boxing guide device
CN114407058A (en) * 2022-01-24 2022-04-29 上海第二工业大学 Multipurpose reducing grabbing device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04173625A (en) * 1990-11-02 1992-06-22 Nippon Piston Ring Co Ltd Constant quantity takeoff device of piston ring
JPH11347963A (en) * 1998-06-05 1999-12-21 Unisia Jecs Corp Elastic ring mounting device
CN202162612U (en) * 2011-06-30 2012-03-14 台州田菱机械有限公司 Automatic feeding device of machine tool
CN202412788U (en) * 2012-01-07 2012-09-05 浙江锻压机床厂 Dumping device of pressure machine
CN104626727A (en) * 2013-11-13 2015-05-20 鸿富锦精密工业(深圳)有限公司 Feeding mechanism
CN206088054U (en) * 2016-08-30 2017-04-12 中银(宁波)电池有限公司 Improved generation battery packing pile up neatly equipment
CN206305859U (en) * 2016-12-06 2017-07-07 浙江工业大学 A kind of automatic doffer one by one of cylindric axial workpiece

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04173625A (en) * 1990-11-02 1992-06-22 Nippon Piston Ring Co Ltd Constant quantity takeoff device of piston ring
JPH11347963A (en) * 1998-06-05 1999-12-21 Unisia Jecs Corp Elastic ring mounting device
CN202162612U (en) * 2011-06-30 2012-03-14 台州田菱机械有限公司 Automatic feeding device of machine tool
CN202412788U (en) * 2012-01-07 2012-09-05 浙江锻压机床厂 Dumping device of pressure machine
CN104626727A (en) * 2013-11-13 2015-05-20 鸿富锦精密工业(深圳)有限公司 Feeding mechanism
CN206088054U (en) * 2016-08-30 2017-04-12 中银(宁波)电池有限公司 Improved generation battery packing pile up neatly equipment
CN206305859U (en) * 2016-12-06 2017-07-07 浙江工业大学 A kind of automatic doffer one by one of cylindric axial workpiece

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113734500A (en) * 2021-09-10 2021-12-03 中北大学 Welding wire boxing guide device
CN114407058A (en) * 2022-01-24 2022-04-29 上海第二工业大学 Multipurpose reducing grabbing device

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