CN107470383A - A kind of aluminium section bar stretches tail jaw automatic positioning mechanism - Google Patents
A kind of aluminium section bar stretches tail jaw automatic positioning mechanism Download PDFInfo
- Publication number
- CN107470383A CN107470383A CN201710877776.5A CN201710877776A CN107470383A CN 107470383 A CN107470383 A CN 107470383A CN 201710877776 A CN201710877776 A CN 201710877776A CN 107470383 A CN107470383 A CN 107470383A
- Authority
- CN
- China
- Prior art keywords
- tail jaw
- rail
- tail
- jaw
- pin
- 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.)
- Pending
Links
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 23
- 239000004411 aluminium Substances 0.000 title claims abstract description 23
- 238000009434 installation Methods 0.000 claims abstract description 7
- 210000000080 chela (arthropods) Anatomy 0.000 claims description 4
- 229910000679 solder Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 24
- 238000001125 extrusion Methods 0.000 description 6
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C35/00—Removing work or waste from extruding presses; Drawing-off extruded work; Cleaning dies, ducts, containers, or mandrels
- B21C35/02—Removing or drawing-off work
- B21C35/03—Straightening the work
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Machines For Laying And Maintaining Railways (AREA)
Abstract
The invention belongs to shape to correct field,It is related to a kind of aluminium section bar and stretches tail jaw automatic positioning mechanism,Tail jaw two bottom sides installing wheel,The rail that tail jaw provides walking track is arranged to below wheel,Rail pin-and-hole is opened up on the length direction of rail both sides,The hydraulic motor that installation driving tail jaw is walked on rail on roller shaft,Bolt mechanism is arranged on tail jaw bottom,The position activity installation that perforate overlaps on slotted eye on the main connecting plate in plugging pin oil cylinder component both sides and connecting lever is oriented to connecting shaft,It is oriented to connecting shaft lower end and the latch being engaged with rail pin-and-hole is fixedly mounted,The sliding bearing being fixedly mounted on tail jaw is arranged outside latch,Plugging pin oil cylinder component is provided with stud connection plate with the position that main connecting plate is connected,The jointed shaft of installation and connecting lever rotation connection on the stud connection plate of plugging pin oil cylinder component both sides,The tail jaw for solving coupling type needs manual operation or semiautomatic control,Automaticity is not high,The problem of production efficiency is relatively low.
Description
Technical field
The invention belongs to shape to correct field, is related to a kind of aluminium section bar and stretches tail jaw automatic positioning mechanism.
Background technology
With the progress of modern industry, al profile extrusion line is just towards large-tonnage, high energy efficiency, the direction hair of automation
Exhibition, conventional small tonnage, low-energy-efficiency, how artificial board are gradually eliminated, and this is also just proposed to Extrusion Process of Aluminum Alloy Profile rear portion equipment
Higher production and technological process requirement.And drawing-in machine is as the section bar shaping straightening mechanism in the equipment of Extrusion Process of Aluminum Alloy Profile rear portion
Even more have many therefore and the problem of produce.
At present, when most of drawing-in machines need to adjust tail jaw position because of supplied materials length difference, the fixation side of tail jaw
Formula is mostly coupling type etc., needs manual operation or semiautomatic control, and automaticity is not high, and production efficiency is relatively low.
The content of the invention
In view of this, the present invention needs manual operation or semiautomatic control to solve the tail jaw of coupling type, automates journey
The problem of degree is not high, and production efficiency is relatively low, there is provided a kind of aluminium section bar stretches tail jaw automatic positioning mechanism.
To reach above-mentioned purpose, the present invention provides following technical scheme：Including U-shaped tail jaw and bolt mechanism, tail pincers
Mouth two bottom sides are provided with some roller shafts, and wheel is provided with the outside of roller shaft, and the lower section of wheel sets promising tail jaw to provide
Walk the rail of track, offer some rail pin-and-holes on the length direction of rail both sides, driving tail pincers are installed on roller shaft
The hydraulic motor that mouth is walked on rail, bolt mechanism are arranged on bottom of the tail jaw away from openend side, bolt mechanism bag
The plugging pin oil cylinder component for being fixedly mounted on tail jaw bottom and main connecting plate are included, the main connecting plate positioned at plugging pin oil cylinder component both sides
Upper to offer main connecting plate slotted eye and the connecting lever with perforate respectively, the position that perforate overlaps on main connecting plate slotted eye and connecting lever is lived
It is dynamic that guiding connecting shaft is installed, it is oriented to connecting shaft lower end and is installed with the latch being engaged with rail pin-and-hole, is arranged outside latch
There is the sliding bearing being fixedly mounted on tail jaw, the position that plugging pin oil cylinder component is connected with main connecting plate is provided with stud connection
Plate, the jointed shaft with connecting lever rotation connection is installed on the stud connection plate of plugging pin oil cylinder component both sides.
Further, the groove being engaged with latch is offered on sliding bearing, latch is fastened in groove.
Further, coded scale is installed on hydraulic motor, proximity switch is installed on plugging pin oil cylinder component.
Further, dead axle is installed, connecting lever is rotated centered on dead axle on the outside of main connecting plate.
Further, wheel fastening is assemblied on the roller shaft of tail jaw both sides, and bearing is provided with wheel.
Further, rail and tail jaw are integral solder frame structure.
Further, rail pin-and-hole is contour isometrical pin-and-hole, and rail pin-and-hole diameter is more than pin diameter, and rail pin-and-hole is close to tail
Jaw tension direction side is to face shape directly.
The beneficial effects of the present invention are：
1st, aluminium section bar of the present invention stretches tail jaw automatic positioning mechanism, and U-shaped tail jaw is seven-roll Abramsen machine to supplied materials
Realize fixing end during pulling action.Seven-roll Abramsen machine according to the difference of aluminium section bar supplied materials length, can adjust the fixation of tail jaw
Position.Tail jaw generally welding structure, head fastening two symmetrical nippers up and down, both sides assembling roller shaft, outside roller shaft
Side installing wheel, interior bottom portion fastening bolt mechanism, afterbody are fastenedly connected hydraulic motor.Hydraulic motor drives chain drive roller
Wheel on the outside of axle moves along rail, and according to the displacement for the coded scale precise determination tail jaw being configured at hydraulic motor,
So that the latch on bolt mechanism aligns with required rail pin-and-hole；It is installed on the bolt mechanism oil cylinder group of tail jaw body bottom surface
Part is stretched out, and fixation of the latch into rail pin-and-hole completion tail jaw is released by crutches arm.It is automatically fixed so to stretch tail jaw
Position mechanism can carry out normal supplied materials straightening operation after supplied materials is fixed.
2nd, aluminium section bar of the present invention stretches tail jaw automatic positioning mechanism, and rail is integral solder frame structure, and rail exists
It is fixed on seven-roll Abramsen machine.Plane provides walking track for tail jaw on rail, and rail both sides are provided with the longitudinal direction
Multiple contour isometrical rail pin-and-holes, rail pin-and-hole diameter are more than pin diameter, and rail pin-and-hole is close to tail jaw tension direction one
Side is faces shape directly so so that the stretching of latch rear molding by latch during pulling force and rail pin-and-hole is that face contacts rather than linear contact lay, latch energy
It is enough to be more firmly fixed in rail pin-and-hole.
3rd, aluminium section bar of the present invention stretches tail jaw automatic positioning mechanism, the main connecting plate and plugging pin oil cylinder group of bolt mechanism
Part is anchored on tail jaw bottom, and after being directed at the hole needed by the signal of coded scale, plugging pin oil cylinder component stretches out, and passes through jointed shaft
Connecting lever action is moved with stud connection strip, connecting lever is rotated centered on dead axle, drives the guiding connecting shaft on connecting lever top in main company
The spacing lower slider of fishplate bar slotted eye, so as to release the latch for being oriented to the fastening of connecting shaft bottom.Latch is flexible with plugging pin oil cylinder,
Slided in the sliding bearing for being anchored on tail jaw body, complete plug location action.Plugging pin oil cylinder drives stud connection when flexible
Plate and jointed shaft movement, the position that proximity switch can be directed at rail pin-and-hole according to latch on coded scale precise determination tail jaw are closed
System, the extreme position stretched out to plugging pin oil cylinder component provide signal so that the latch insertion rail pin-and-hole on plugging pin oil cylinder component
In, the position of whole tail jaw is fixed.
4th, aluminium section bar of the present invention stretches tail jaw automatic positioning mechanism, and experience and continuous development are used according to equipment for many years
Technical requirements, summarize domestic and international advanced experience and technology, using the processing and manufacturing ability of enterprise oneself, exploitation enterprise oneself
Device product, reduce business equipment investment and maintenance cost.New aluminium section bar stretches a whole set of in tail jaw automatic positioning mechanism
Without manual operation and monitoring, automaticity is high, improves aluminium section bar production efficiency and security for action, reduce employment into
This.
Brief description of the drawings
In order that the purpose of the present invention, technical scheme and beneficial effect are clearer, the present invention provides drawings described below and carried out
Explanation：
Fig. 1 is the structural representation that aluminium section bar of the present invention stretches tail jaw automatic positioning mechanism；
Fig. 2 is the structural representation of bolt mechanism in embodiment；
Fig. 3 is the front view that aluminium section bar of the present invention stretches tail jaw automatic positioning mechanism；
Fig. 4 is along the profile in A-A faces in embodiment 3.
Embodiment
The preferred embodiments of the present invention will be described in detail below.
Reference in Figure of description includes：
It is rail 1, tail jaw 2, bolt mechanism 3, wheel 4, hydraulic motor 5, rail pin-and-hole 6, plugging pin oil cylinder component 7, close
Switch 8, stud connection plate 9, jointed shaft 10, connecting lever 11, dead axle 12, main connecting plate 13, sliding bearing 14, latch 15, the company of guiding
Spindle 16.
Aluminium section bar as shown in Figure 1, Figure 3 stretches tail jaw automatic positioning mechanism, including U-shaped tail jaw 2 and such as Fig. 2
Two roller shafts that shown bolt mechanism 3, the left side of the bottom of tail jaw 2 and right side installation run through, the fastening of wheel 4 are assemblied in tail
On the roller shaft of the both sides of jaw 2, bearing is installed in wheel 4, can be added lubricating oil to entering to wheel 4 in bearing by lubricating cup
Row lubricated maintenance.The lower section of wheel 4 is arranged to the rail 1 that tail jaw 2 provides walking track, and rail 1 and tail jaw 2 are entirety
Lead frame structure.U-shaped tail jaw 2 clamps the aluminium alloy extrusions of aligning to be tensioned, and tail jaw 2 can enter along rail 1
Row movement.
Open up some rail pin-and-holes 6 on the length direction of the both sides of rail 1, rail pin-and-hole 6 is contour isometrical pin-and-hole, rail pin
The diameter of hole 6 is more than the diameter of latch 15, and rail pin-and-hole 6 is to face shape directly close to the tension direction side of tail jaw 2.So cause latch 15
Rear molding stretching is that face contacts rather than linear contact lay, latch 15 are fixed more firm with rail pin-and-hole 6 by latch during pulling force 15.
Installation drives the hydraulic motor 5 that tail jaw 2 is walked on rail 1 on roller shaft, and coding is installed on hydraulic motor 5
Chi, bolt mechanism 3 are arranged on bottom of the tail jaw 2 away from openend side, and bolt mechanism 3 includes being fixedly mounted on tail jaw 2
The plugging pin oil cylinder component 7 and main connecting plate 13 of bottom, the outside of main connecting plate 13 are provided with dead axle 12, and connecting lever 11 is with dead axle 12
Center rotating.
The main slotted eye of connecting plate 13 is offered respectively on the main connecting plate 13 of the left and right sides of plugging pin oil cylinder component 7 and is carried
The connecting lever 11 of perforate, the position activity installation that perforate overlaps on the main slotted eye of connecting plate 13 and connecting lever 11 are oriented to connecting shaft 16, are oriented to
The lower end of connecting shaft 16 is installed with the latch 15 being engaged with rail pin-and-hole 6, is arranged with outside latch 15 and is fixedly mounted on tail pincers
Sliding bearing 14 as shown in Figure 4 on mouthfuls 2, the groove being engaged with latch 15 is offered on sliding bearing 14, latch 15 blocks
It is located in groove.Proximity switch 8 is installed, the position peace that plugging pin oil cylinder component 7 is connected with main connecting plate 13 on plugging pin oil cylinder component 7
Stud connection plate 9 is filled, the hinge being rotatablely connected with connecting lever 11 is installed on the stud connection plate 9 of the both sides of plugging pin oil cylinder component 7
Spindle 10.
When the aluminium section bar stretches the work of tail jaw automatic positioning mechanism, aluminium alloy extrusions to be tensioned is placed in tail jaw
In 2 U-shaped mouth, the main connecting plate 13 and plugging pin oil cylinder component 7 of bolt mechanism 3 are anchored on the bottom of tail jaw 2, pass through hydraulic motor
After the pin-and-hole that the signal alignment of coded scale needs on 5, plugging pin oil cylinder is stretched out, and is driven and turned by jointed shaft 10 and stud connection plate 9
Arm 11 is acted, and connecting lever 11 is rotated centered on dead axle 12, drives the guiding connecting shaft 16 on the top of connecting lever 11 in the main groove of connecting plate 13
The spacing lower slider in hole, so as to release the latch 15 for being oriented to the fastening of the bottom of connecting shaft 16.Latch 15 is flexible with plugging pin oil cylinder,
Slided in the sliding bearing 14 for being anchored on the body of tail jaw 2, complete plug location action.Band dynamic hinge connects when plugging pin oil cylinder is flexible
Fishplate bar 9 and jointed shaft 10 move, and proximity switch 8 can be directed at rail pin-and-hole 6 according to latch 15 on coded scale precise determination tail jaw 2
Position relationship, to plugging pin oil cylinder component 7 stretch out extreme position provide signal so that the latch 15 on plugging pin oil cylinder component 7
Insert in rail pin-and-hole 6, the position of whole tail jaw 2 is fixed.By the cooperation of proximity switch 8 and coded scale, treat
The aluminium alloy extrusions of tension straingtening carries out intelligent tension straingtening, the entire exercise of seven-roll Abramsen machine without manual operation and monitoring,
Automaticity is high, improves production efficiency.
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical
Cross above preferred embodiment the present invention is described in detail, it is to be understood by those skilled in the art that can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (7)
1. a kind of aluminium section bar stretches tail jaw automatic positioning mechanism, it is characterised in that including U-shaped tail jaw and latch machine
Structure, tail jaw two bottom sides are provided with some roller shafts, and wheel is provided with the outside of roller shaft, and the lower section of wheel sets promising tail pincers
Mouth provides the rail of walking track, offers some rail pin-and-holes on the length direction of rail both sides, drive is provided with roller shaft
The hydraulic motor that dynamic tail jaw is walked on rail, bolt mechanism are arranged on bottom of the tail jaw away from openend side, latch
Mechanism includes being fixedly mounted on the plugging pin oil cylinder component of tail jaw bottom and main connecting plate, the master positioned at plugging pin oil cylinder component both sides
Offer main connecting plate slotted eye and the connecting lever with perforate on connecting plate respectively, on main connecting plate slotted eye and connecting lever perforate overlap
Position is movably installed with guiding connecting shaft, is oriented to connecting shaft lower end and is installed with the latch being engaged with rail pin-and-hole, latch
The sliding bearing being fixedly mounted on tail jaw is arranged with outside, the position installation that plugging pin oil cylinder component is connected with main connecting plate is hinged
Axis connection plate, the jointed shaft with connecting lever rotation connection is installed on the stud connection plate of plugging pin oil cylinder component both sides.
2. aluminium section bar as claimed in claim 1 stretches tail jaw automatic positioning mechanism, it is characterised in that the sliding bearing
On offer the groove being engaged with latch, latch is fastened in groove.
3. aluminium section bar as claimed in claim 1 stretches tail jaw automatic positioning mechanism, it is characterised in that the hydraulic motor
On coded scale is installed, proximity switch is installed on plugging pin oil cylinder component.
4. aluminium section bar as claimed in claim 2 stretches tail jaw automatic positioning mechanism, it is characterised in that the main connecting plate
Outside dead axle is installed, connecting lever is rotated centered on dead axle.
5. aluminium section bar as claimed in claim 4 stretches tail jaw automatic positioning mechanism, it is characterised in that the wheel fastening
It is assemblied on the roller shaft of tail jaw both sides, bearing is installed in the wheel.
6. the aluminium section bar as described in Claims 1 to 5 is any stretches tail jaw automatic positioning mechanism, it is characterised in that described
Rail and tail jaw are integral solder frame structure.
7. aluminium section bar as claimed in claim 6 stretches tail jaw automatic positioning mechanism, it is characterised in that the rail pin-and-hole
For contour isometrical pin-and-hole, the rail pin-and-hole diameter is more than pin diameter, and the rail pin-and-hole is close to tail jaw tension direction one
Side is to face shape directly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710877776.5A CN107470383A (en) | 2017-09-25 | 2017-09-25 | A kind of aluminium section bar stretches tail jaw automatic positioning mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710877776.5A CN107470383A (en) | 2017-09-25 | 2017-09-25 | A kind of aluminium section bar stretches tail jaw automatic positioning mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107470383A true CN107470383A (en) | 2017-12-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710877776.5A Pending CN107470383A (en) | 2017-09-25 | 2017-09-25 | A kind of aluminium section bar stretches tail jaw automatic positioning mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107470383A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107971361A (en) * | 2017-12-22 | 2018-05-01 | 中国重型机械研究院股份公司 | A kind of online seven-roll Abramsen machine coupling type adaptive location control device |
| CN108262376A (en) * | 2018-03-26 | 2018-07-10 | 佛山市腾华自动化机械有限公司 | A kind of drawing-in machine |
| CN108906899A (en) * | 2018-08-16 | 2018-11-30 | 中国重型机械研究院股份公司 | A kind of stretching aircraft tail shelf localization method and device |
| CN109351814A (en) * | 2018-12-26 | 2019-02-19 | 辽宁忠旺机械设备制造有限公司 | A kind of aluminum profile automatic positioning mechanism and aluminum profile drawing-in machine |
| CN112096685A (en) * | 2020-08-06 | 2020-12-18 | 宝钢特钢韶关有限公司 | Bolt jar and straightener |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB537264A (en) * | 1939-11-13 | 1941-06-16 | Head Wrightson & Co Ltd | A new and improved machine for stretching metals |
| JP2000237817A (en) * | 1999-02-17 | 2000-09-05 | Nippon Light Metal Co Ltd | Method for treating rear face of aluminum extruded shape and equipment for treating rear face |
| CN1712151A (en) * | 2005-06-10 | 2005-12-28 | 西安重型机械研究所 | Design method and device for hydraulic stretch flattener |
| CN204110822U (en) * | 2014-09-11 | 2015-01-21 | 北京睿力恒一物流技术股份公司 | A kind of guide tracked slide device |
| CN204700089U (en) * | 2015-06-15 | 2015-10-14 | 曾伟根 | A kind of hydraulic stretcher being applicable to large scale aluminium tube |
| CN105114407A (en) * | 2015-09-02 | 2015-12-02 | 中国重型机械研究院股份公司 | Bolt positioning mechanism |
| CN207188495U (en) * | 2017-09-25 | 2018-04-06 | 辽宁忠旺机械设备制造有限公司 | A kind of aluminium section bar stretches tail jaw automatic positioning mechanism |
-
2017
- 2017-09-25 CN CN201710877776.5A patent/CN107470383A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB537264A (en) * | 1939-11-13 | 1941-06-16 | Head Wrightson & Co Ltd | A new and improved machine for stretching metals |
| JP2000237817A (en) * | 1999-02-17 | 2000-09-05 | Nippon Light Metal Co Ltd | Method for treating rear face of aluminum extruded shape and equipment for treating rear face |
| CN1712151A (en) * | 2005-06-10 | 2005-12-28 | 西安重型机械研究所 | Design method and device for hydraulic stretch flattener |
| CN204110822U (en) * | 2014-09-11 | 2015-01-21 | 北京睿力恒一物流技术股份公司 | A kind of guide tracked slide device |
| CN204700089U (en) * | 2015-06-15 | 2015-10-14 | 曾伟根 | A kind of hydraulic stretcher being applicable to large scale aluminium tube |
| CN105114407A (en) * | 2015-09-02 | 2015-12-02 | 中国重型机械研究院股份公司 | Bolt positioning mechanism |
| CN207188495U (en) * | 2017-09-25 | 2018-04-06 | 辽宁忠旺机械设备制造有限公司 | A kind of aluminium section bar stretches tail jaw automatic positioning mechanism |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107971361A (en) * | 2017-12-22 | 2018-05-01 | 中国重型机械研究院股份公司 | A kind of online seven-roll Abramsen machine coupling type adaptive location control device |
| CN108262376A (en) * | 2018-03-26 | 2018-07-10 | 佛山市腾华自动化机械有限公司 | A kind of drawing-in machine |
| CN108906899A (en) * | 2018-08-16 | 2018-11-30 | 中国重型机械研究院股份公司 | A kind of stretching aircraft tail shelf localization method and device |
| CN109351814A (en) * | 2018-12-26 | 2019-02-19 | 辽宁忠旺机械设备制造有限公司 | A kind of aluminum profile automatic positioning mechanism and aluminum profile drawing-in machine |
| CN112096685A (en) * | 2020-08-06 | 2020-12-18 | 宝钢特钢韶关有限公司 | Bolt jar and straightener |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171215 |
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| RJ01 | Rejection of invention patent application after publication |