CN104801625A - Automatic material receiving device for punching machine - Google Patents
Automatic material receiving device for punching machine Download PDFInfo
- Publication number
- CN104801625A CN104801625A CN201510258146.0A CN201510258146A CN104801625A CN 104801625 A CN104801625 A CN 104801625A CN 201510258146 A CN201510258146 A CN 201510258146A CN 104801625 A CN104801625 A CN 104801625A
- Authority
- CN
- China
- Prior art keywords
- connecting rod
- punch press
- automatic material
- adjustment connecting
- activity splicing
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/20—Storage arrangements; Piling or unpiling
- B21D43/22—Devices for piling sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
- B21D45/06—Stripping-off devices
- B21D45/08—Stripping-off devices interrelated with motion of tool
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Press Drives And Press Lines (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention relates to an automatic material receiving device for a punching machine. Angles of a short connecting rod and a long connecting rod are regulated on site, the short connecting rod and the long connecting rod are connected to an upper movable shaft in a welding manner, two ends of the upper movable shaft are supported and mounted in a bearing seat, and the bearing seat is mounted on an upper fixed bracket; the upper end of an upper regulating connecting rod is connected to the end of the short connecting rod through a pin shaft, and the lower end of the upper regulating connecting rod is connected to a middle supporting seat through the pin shaft; the right end of a fixed groove plate is hinged to a lower bracket, a movable material receiving body is mounted in the fixed groove plate and can freely move left and right, and a movable material receiving plate is mounted in the movable material receiving body in an embedding manner; the left end of a lower regulating connecting rod is hinged to the lower end of the long connecting rod, the right end of the lower regulating connecting rod is hinged to an upper fixed bracket for movably receiving materials , and the upper fixed bracket for movably receiving materials is fixedly connected to the movable material receiving body. The automatic material receiving device disclosed by the invention is simple in structure and reasonable in design, under the premise that the safety is ensured, requirements of automatically stacking workpieces are satisfied and the operation is convenient, the overall speed of the whole punching process is improved, the production safety and the production efficiency are improved, and the labor intensity is reduced.
Description
Technical field
The present invention relates to the auxiliary mould equipment that the punching of electromechanics trade all types of serial motors stator and rotor adds man-hour on corresponding punch press, specifically a kind of punch press automatic material connection device, belongs to mechanical frock equipment technical field.
Background technology
In prior art, the stator and rotor punching of all types of serial motors adds man-hour on corresponding punch press, stacks neat after normally utilizing its magnetic to be taken out by workpiece the special magnetic sheet of motor stator and rotor punching swept away by operating punch machine work more on request.Because this work relies on the qualification of operative employee purely, add the particularity of work---back and forth frequent operation, as easy as rolling off a log generation is tired, the labour intensity of operative employee is very large, and operating efficiency is on the low side, bring severe compromise to production, the security incident incidence in operating punch machine process is always very high.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of punch press automatic material connection device is provided, its structure is simple, reasonable in design, guaranteeing safety and meeting under workpiece stacks requirement and easy to operate prerequisite automatically, improve the bulk velocity of whole punching course, improve production security and production efficiency, greatly reduce the labour intensity of punching operation work when punching press.
According to technical scheme provided by the invention: punch press automatic material connection device, is characterized in that: comprise fixed support, lower adjustment connecting rod, long connecting rod, bearing block, upper movable axis and upper fixed support in short connecting rod, upper adjustment connecting rod, middle bearing, activity splicing plate, lower carriage, fixing frid, activity splicing body, activity splicing; Described short connecting rod and long connecting rod are adjusted angle at the scene and are welded to connect on upper movable axis, and described upper movable axis two supports is arranged in bearing block, and described bearing block is arranged on fixed support; Described upper adjustment small end by pinned connection in short connecting rod end, described upper adjustment connecting rod lower end by pinned connection on middle bearing; Described fixing frid right-hand member is hinged on lower carriage, and described activity splicing body is contained in fixing frid and also can moves freely left and right, and described activity splicing plate is inlaid in activity splicing body; Described lower adjustment connecting rod left end and long connecting rod lower end hinged, in lower adjustment connecting rod right-hand member and activity splicing, fixed support is hinged, and in described activity splicing, fixed support is fixedly connected on activity splicing body.
As a further improvement on the present invention, described activity splicing body bottom portion is provided with little axle, and described little axle two ends are provided with rolling bearing, in the both sides conduit that described rolling bearing is placed in fixing frid and can Free-rolling.
As a further improvement on the present invention, described fixing frid right-hand member is hinged on lower carriage by spherical plain bearing rod end, and described spherical plain bearing rod end is fixed by nut check.
As a further improvement on the present invention, described lower carriage is provided with the lower carriage singletree for placing fixing frid.
As a further improvement on the present invention, described lower carriage side is provided with the backstay for leaning with punch press side.
As a further improvement on the present invention, described upper adjustment small end with between short connecting rod, upper adjustment connecting rod lower end with between middle bearing, lower adjustment connecting rod left end with between long connecting rod lower end, lower adjustment connecting rod right-hand member be all be connected by bearing pin and adjusting joint assembly between fixed support in activity splicing.
As a further improvement on the present invention, described adjusting joint assembly comprises forked type joint and locking nut, the two ends of described upper adjustment connecting rod, lower adjustment connecting rod are equipped with thread segment, described forked type joint and locking nut spiral shell are contained on described thread segment, and forked type joint is locked with locking nut after regulating and putting in place.
As a further improvement on the present invention, bottom described lower carriage, be provided with base angle angle steel, described base angle angle steel is fitted with base angle expansion bolt.
the present invention, compared with technology before, has the following advantages:structure of the present invention is simple, reasonable in design, guaranteeing safety and meeting under workpiece stacks requirement and easy to operate prerequisite automatically, improve the bulk velocity of whole punching course, improve production security and production efficiency, greatly reduce the labour intensity of punching operation work when punching press.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
Fig. 2 is that A-A in Fig. 1 is to office's sectional view.
Detailed description of the invention
Below in conjunction with concrete drawings and Examples, the invention will be further described.
As Fig. 1, shown in Fig. 2, punch press automatic material connection device in embodiment is primarily of bearing pin 1, short connecting rod 2, upper adjustment connecting rod 3, middle bearing 4, activity splicing plate 5, forked type joint 7, little axle 8, rolling bearing 10, backstay 11, lower carriage singletree 12, lower carriage 13, base angle angle steel 14, base angle expansion bolt 15, fixing frid 16, spherical plain bearing rod end 17, nut 18, activity splicing body 19, fixed support 20 in activity splicing, lower adjustment connecting rod 21, locking nut 22, long connecting rod 23, bearing block 24, upper movable axis 25, the compositions such as upper fixed support 26 and hex bolts 27.
As shown in Figure 1 and Figure 2, described short connecting rod 2 is adjusted angle at the scene with long connecting rod 23 and is welded to connect on upper movable axis 25, and described upper movable axis 25 two supports is arranged in bearing block 24, and described bearing block 24 is arranged on fixed support 26; Described upper adjustment connecting rod 3 upper end thereof is in short connecting rod 2 end, and described upper adjustment connecting rod 3 lower end is hinged on middle bearing 4, and described middle bearing 4 is connected on the movable cope match-plate pattern 6 of punch press, arranges punch press and fix lower bolster 9 immediately below the movable cope match-plate pattern 6 of punch press; Described fixing frid 16 right-hand member is hinged on lower carriage 13, and described activity splicing body 19 is contained in fixing frid 16 and also can moves freely left and right, and described activity splicing plate 5 is inlaid in activity splicing body 19; Described lower adjustment connecting rod 21 left end and long connecting rod 23 lower end hinged, in lower adjustment connecting rod 21 right-hand member and activity splicing, fixed support 20 is hinged, and in described activity splicing, fixed support 20 is fixedly connected on activity splicing body 19.
As shown in Figure 1 and Figure 2, in the embodiment of the present invention, be provided with little axle 8 bottom described activity splicing body 19, described little axle 8 two ends are provided with rolling bearing 10, in the both sides conduit that described rolling bearing 10 is placed in fixing frid 16 and can Free-rolling.Can ensure that the relative movement between activity splicing body 19 and fixing frid 16 can be smooth and easy without hindrance like this, reduce work noise.
As shown in Figure 1, in the embodiment of the present invention, described fixing frid 16 right-hand member is hinged on lower carriage 13 by spherical plain bearing rod end 17, and described spherical plain bearing rod end 17 is locked by nut 18.Described lower carriage 13 is provided with the lower carriage singletree 12 for placing fixing frid 16.Described lower carriage 13 side is provided with the backstay 11 for leaning with punch press side.
As shown in Figure 1, in the embodiment of the present invention, described upper adjustment connecting rod 3 upper end with between short connecting rod 2, upper adjustment connecting rod 3 lower end with between middle bearing 4, lower adjustment connecting rod 21 left end with between long connecting rod 23 lower end, lower adjustment connecting rod 21 right-hand member be all be connected by bearing pin 1 and adjusting joint assembly between fixed support 20 in activity splicing.Adjusting joint assembly in embodiment comprises forked type joint 7 and locking nut 22, the two ends of described upper adjustment connecting rod 3, lower adjustment connecting rod 21 are equipped with thread segment, described forked type joint 7 and locking nut 22 spiral shell are contained on described thread segment, forked type joint 7 is locked with locking nut 22 after regulating and putting in place, and described bearing pin 1 is connected on forked type joint 7.
As shown in Figure 1, in the embodiment of the present invention, bottom described lower carriage 13, be provided with base angle angle steel 14, described base angle angle steel 14 be fitted with base angle expansion bolt 15, the present invention firmly can be fixed by base angle expansion bolt 15.
During concrete installation application, the present invention is arranged on punch press side, fixed support 26 hex bolts 27 is fixedly mounted on the top position of side of corresponding punch press, backstay 11 on described lower carriage 13 leans at position on the lower with the side of corresponding punch press, determines the installation site of punch press automatic material connection device thus.The forked type joint 7 that upper adjustment connecting rod 3 and lower adjustment connecting rod 21 two ends connect regulates by on-the-spot actual size, then locks with locking nut 22 respectively; Be weldingly fixed on movable axis 25 after short connecting rod 2 and long connecting rod 23 adjust respective angles respectively at the scene, become an entirety, and this entirety can rotate easily.
During work, when the movable cope match-plate pattern 6 of punch press down moves, during the movable cope match-plate pattern 6 of punch press drives, bearing 4 synchronously moves downward, middle bearing 4 drives upper adjustment connecting rod 3, upper adjustment connecting rod 3 pulls downwards centered by short connecting rod 2 and long connecting rod more than 23 movable axis 25 and rotates, thus long connecting rod 23 lower end is swung to the right; Again because long connecting rod 23 lower end is connected with activity splicing body 19 with fixed support 20 in activity splicing by lower adjustment connecting rod 21, thus make activity splicing body 19 and the activity splicing plate 5 be inlaid in activity splicing body 19 moves right in fixing frid 16, complete the half of whole ramming motion; When the movable cope match-plate pattern 6 of punch press up moves, during the movable cope match-plate pattern 6 of punch press drives, bearing 4 synchronously moves upward, middle bearing 4 drives upper adjustment connecting rod 3, upper adjustment connecting rod 3 upwardly rotates centered by short connecting rod 2 and long connecting rod more than 23 movable axis 25, thus long connecting rod 23 lower end is swung left, and then make activity splicing body 19 and activity splicing plate 5 in fixing frid 16 to left movement, complete second half of whole ramming motion; At this moment punching can fall within activity splicing plate 5 by nature, and through activity splicing body 19, the automatic feed mechanism being arrived later process by its motional inertia completes automatic stacking.
The present invention can directly be installed on existing punch press, namely the mechanical movement (up and down reciprocatingly shuttling movement) of punch press itself is utilized, the stator and rotor punching swept away automatically is taken out after sweeping away, namely can carry out automatic material connection while punching press, and automatically realize stacking; Security improves greatly, gets the more quick and easy and safety of workpiece, greatly reduces the labour intensity of punching operation work in punching course, improves the production efficiency of punching press, for the punching press punching work of motor provides quality assurance reliable and secure very greatly.Operative employee, when concrete operations, only needs the raw material of punching press to be placed on corresponding punch press, adjusts punching can be carried out in the relevant positions such as blanking punching operation to workpiece.If the supporting automatic feeding of corresponding punch press energy, also can realize unattended.
Claims (8)
1. punch press automatic material connection device, is characterized in that: comprise fixed support (20), lower adjustment connecting rod (21), long connecting rod (23), bearing block (24), upper movable axis (25) and upper fixed support (26) in short connecting rod (2), upper adjustment connecting rod (3), middle bearing (4), activity splicing plate (5), lower carriage (13), fixing frid (16), activity splicing body (19), activity splicing; Described short connecting rod (2) and long connecting rod (23) are adjusted angle at the scene and are welded to connect on upper movable axis (25), described upper movable axis (25) two supports is arranged in bearing block (24), and described bearing block (24) is arranged on fixed support (26); Described upper adjustment connecting rod (3) upper end is connected to short connecting rod (2) end by bearing pin (1), and described upper adjustment connecting rod (3) lower end is connected on middle bearing (4) by bearing pin (1); Described fixing frid (16) right-hand member is hinged on lower carriage (13), and described activity splicing body (19) is contained in fixing frid (16) and also can moves freely left and right, and described activity splicing plate (5) is inlaid in activity splicing body (19); Described lower adjustment connecting rod (21) left end and long connecting rod (23) lower end hinged, in lower adjustment connecting rod (21) right-hand member and activity splicing, fixed support (20) is hinged, and in described activity splicing, fixed support (20) is fixedly connected on activity splicing body (19).
2. punch press automatic material connection device as claimed in claim 1, it is characterized in that: described activity splicing body (19) bottom is provided with little axle (8), described little axle (8) two ends are provided with rolling bearing (10), in the both sides conduit that described rolling bearing (10) is placed in fixing frid (16) and can Free-rolling.
3. punch press automatic material connection device as claimed in claim 1, is characterized in that: described fixing frid (16) right-hand member is hinged on lower carriage (13) by spherical plain bearing rod end (17), and described spherical plain bearing rod end (17) is locked by nut (18).
4. punch press automatic material connection device as claimed in claim 1, is characterized in that: described lower carriage (13) is provided with the lower carriage singletree (12) for placing fixing frid (16).
5. punch press automatic material connection device as claimed in claim 1, is characterized in that: described lower carriage (13) side is provided with the backstay (11) for leaning with punch press side.
6. punch press automatic material connection device as claimed in claim 1, is characterized in that: described upper adjustment connecting rod (3) upper end with between short connecting rod (2), between upper adjustment connecting rod (3) lower end with middle bearing (4), between lower adjustment connecting rod (21) left end with long connecting rod (23) lower end, lower adjustment connecting rod (21) right-hand member with activity splicing is all be connected by bearing pin (1) and adjusting joint assembly between fixed support (20).
7. punch press automatic material connection device as claimed in claim 6, it is characterized in that: described adjusting joint assembly comprises forked type joint (7) and locking nut (22), the two ends of described upper adjustment connecting rod (3), lower adjustment connecting rod (21) are equipped with thread segment, described forked type joint (7) and locking nut (22) spiral shell are contained on described thread segment, and forked type joint (7) is locked with locking nut (22) after regulating and putting in place.
8. punch press automatic material connection device as claimed in claim 1, is characterized in that: described lower carriage (13) bottom is provided with base angle angle steel (14), described base angle angle steel (14) is fitted with base angle expansion bolt (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510258146.0A CN104801625B (en) | 2015-05-19 | 2015-05-19 | Automatic material receiving device for punching machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510258146.0A CN104801625B (en) | 2015-05-19 | 2015-05-19 | Automatic material receiving device for punching machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104801625A true CN104801625A (en) | 2015-07-29 |
| CN104801625B CN104801625B (en) | 2017-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510258146.0A Active CN104801625B (en) | 2015-05-19 | 2015-05-19 | Automatic material receiving device for punching machine |
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| Country | Link |
|---|---|
| CN (1) | CN104801625B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105251903A (en) * | 2015-11-04 | 2016-01-20 | 六安江淮电机有限公司 | Unloading system of motor silicon steel sheet stamping part |
| CN106088602A (en) * | 2016-07-23 | 2016-11-09 | 尚梅 | A kind of construction of super highrise building elevator material-receiving device |
| CN106894714A (en) * | 2017-04-27 | 2017-06-27 | 武汉凌云建筑装饰工程有限公司 | Automatic blocking hangs window |
| CN108856553A (en) * | 2018-07-13 | 2018-11-23 | 杨朝轩 | A kind of automatic material connection device on press machine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030049091A (en) * | 2001-12-14 | 2003-06-25 | 주식회사 포스코 | A plate loading apparatus |
| CN201399523Y (en) * | 2009-04-17 | 2010-02-10 | 河北小蜜蜂工具集团有限公司 | Automatic material-receiving device of punch |
| CN102179454A (en) * | 2011-03-25 | 2011-09-14 | 西安交通大学 | Adjustable receiving disc mechanism for punching upper discharged component |
| CN202169310U (en) * | 2011-06-14 | 2012-03-21 | 万鼎硅钢集团有限公司 | Punching mechanism with reciprocating automatic material receiving device |
| CN204052697U (en) * | 2014-06-30 | 2014-12-31 | 苏州嘉瑞机械电器有限公司 | A kind of punch press with automatic discharging function |
| CN204685883U (en) * | 2015-05-19 | 2015-10-07 | 中达电机股份有限公司 | Punch press automatic material connection device |
-
2015
- 2015-05-19 CN CN201510258146.0A patent/CN104801625B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030049091A (en) * | 2001-12-14 | 2003-06-25 | 주식회사 포스코 | A plate loading apparatus |
| CN201399523Y (en) * | 2009-04-17 | 2010-02-10 | 河北小蜜蜂工具集团有限公司 | Automatic material-receiving device of punch |
| CN102179454A (en) * | 2011-03-25 | 2011-09-14 | 西安交通大学 | Adjustable receiving disc mechanism for punching upper discharged component |
| CN202169310U (en) * | 2011-06-14 | 2012-03-21 | 万鼎硅钢集团有限公司 | Punching mechanism with reciprocating automatic material receiving device |
| CN204052697U (en) * | 2014-06-30 | 2014-12-31 | 苏州嘉瑞机械电器有限公司 | A kind of punch press with automatic discharging function |
| CN204685883U (en) * | 2015-05-19 | 2015-10-07 | 中达电机股份有限公司 | Punch press automatic material connection device |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105251903A (en) * | 2015-11-04 | 2016-01-20 | 六安江淮电机有限公司 | Unloading system of motor silicon steel sheet stamping part |
| CN105251903B (en) * | 2015-11-04 | 2017-07-18 | 六安江淮电机有限公司 | The discharge system of dynamo sheet stamping parts |
| CN106088602A (en) * | 2016-07-23 | 2016-11-09 | 尚梅 | A kind of construction of super highrise building elevator material-receiving device |
| CN106088602B (en) * | 2016-07-23 | 2018-01-16 | 西安科技大学 | A kind of construction of super highrise building lift material-receiving device |
| CN106894714A (en) * | 2017-04-27 | 2017-06-27 | 武汉凌云建筑装饰工程有限公司 | Automatic blocking hangs window |
| CN106894714B (en) * | 2017-04-27 | 2019-01-08 | 武汉凌云建筑装饰工程有限公司 | Automatic blocking hangs window |
| CN108856553A (en) * | 2018-07-13 | 2018-11-23 | 杨朝轩 | A kind of automatic material connection device on press machine |
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| Publication number | Publication date |
|---|---|
| CN104801625B (en) | 2017-02-01 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Automatic material receiving device of punch press Effective date of registration: 20220216 Granted publication date: 20170201 Pledgee: Wuxi Xinwu sub branch of Agricultural Bank of China Ltd. Pledgor: ZHONGDA MOTORS Co.,Ltd. Registration number: Y2022320010072 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |