CN209127593U - A kind of bilateral doffer - Google Patents
A kind of bilateral doffer Download PDFInfo
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- CN209127593U CN209127593U CN201821872436.XU CN201821872436U CN209127593U CN 209127593 U CN209127593 U CN 209127593U CN 201821872436 U CN201821872436 U CN 201821872436U CN 209127593 U CN209127593 U CN 209127593U
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Abstract
The utility model discloses a kind of bilateral doffers in doffer field, including base, it is from left to right arranged successively on the base and is provided with several rotatable conveying rollers, conveying roller is horizontally disposed, each conveying roller is sequentially connected with rotary drive mechanism one, pipe fitting is horizontally supported on conveying roller, and being provided on the base can push away respectively pipe fitting the pusher for falling on front side feeding zone and rear side feeding zone, and pusher is arranged in a staggered manner mutually with conveying roller.The utility model can blanking falls on front side feeding zone and rear side feeding zone respectively by the steel pipe after cutting forming, qualified product pipe fitting and substandard products pipe fitting is sorted out, blanking is more efficient.
Description
Technical field
The utility model belongs to doffer field, in particular to a kind of bilateral doffer.
Background technique
In the prior art, coil of strip is first fixed on discharging frame, steel heading end is through storage device by welded tube in production and processing
It is sent into straightening mechanism smoothing, then steel band sequentially enters roller pressing forming machine molding, becomes tubulose, and then welded device is by pipe seam
Welding squeezes closing, then tracks and cut off through disconnecting device, then falls on a conveyor, process above is all continuously finished.
When cutting off welded tube after molding and transmitting on a conveyor, need to carry out blanking.
Chinese patent database discloses a kind of automatic bidirectional blanking machine, number of patent application: 201711413624 .6；
2017 .12 .24 of the applying date；Its structure includes base, and the upper end of the base is provided with blanking block, the blanking block it is upper
It holds and offsets with the outlet of the lower end of charging line, bearing block rotation is provided on the base of the blanking block side and is provided with
Screw rod, the side of the blanking block be provided with the mutually matched swivel nut of screw rod, be provided in one end of the screw rod driven
Gear is provided with servo deceleration motor on the base of the screw rod side, sets on the motor shaft of the servo deceleration motor
Be equipped with the mutually matched driving gear of driven gear, be provided with and led by support frame on the base of the blanking block other side
To bar, the other side of the blanking block be provided with the mutually matched guide sleeve of guide rod, at the both ends pair of the blanking block
Title is provided with blanking groove.The device can carry out quickly two-way blanking, the process of blanking block transverse shifting back and forth to ball workpiece
In simultaneously side blanking, two kinds of the other side splicing movement, material with splicing alternately.But disadvantage is that: it cuts into
For welded tube after type in conveying, it is rejected product that wherein there is part steel pipe, there may be flaws, is needed qualified steel pipe and substandard products
Steel pipe separates blanking, which is suitable for ball workpiece, can not be suitable for the two-way blanking of the steel pipe with certain length.
Utility model content
The purpose of the utility model is to provide a kind of bilateral doffers, the steel pipe after cutting forming can be distinguished blanking
Front side feeding zone and rear side feeding zone are fallen on, qualified product pipe fitting and substandard products pipe fitting are sorted out, blanking is more efficient.
Purpose of the utility model is realized as follows: a kind of bilateral doffer, including base, from a left side on the base
It is arranged successively to the right side and is provided with several rotatable conveying rollers, conveying roller is horizontally disposed, and each conveying roller drives with rotation
Motivation structure one is sequentially connected, and pipe fitting is horizontally supported on conveying roller, is provided with to push away respectively pipe fitting on the base and falls on
The pusher of front side feeding zone and rear side feeding zone, pusher are arranged in a staggered manner mutually with conveying roller.
When utility model works, the pipe fitting after more cutting formings is successively transferred on conveying roller, rotation driving
Mechanism one drives each conveying roller to rotate, and pipe fitting is transmitted along base, when pipe fitting is sent to base tail end, pusher work,
Blanking falls on front side feeding zone and rear side feeding zone respectively for qualified product pipe fitting and substandard products pipe fitting.Compared with prior art, this is practical
Novel beneficial effect is: can be realized and sorts out qualified product pipe fitting and substandard products pipe fitting, qualified product pipe fitting continues
The removal of interior weldering muscle, then collects and is packaged；After substandard products pipe fitting is collected packing, it is recycled.The utility model can be used
The bilateral blanking of welded tube after cutting forming, qualified product pipe fitting and substandard products pipe fitting are sorted out.
The pusher includes at least one set of two-way pushing material component as a further improvement of the utility model, two-way
Pushing material component includes preceding feeding plate and rear feeding plate, and two-way pushing material component is located at below pipe fitting, the upper inclination of the preceding feeding plate
It is correspondingly arranged tiltedly and with front side feeding zone, preceding feeding plate is arranged in a staggered manner with conveying roller, preceding feeding plate and a lift drive mechanism
Transmission connection；It is described after feeding plate incline upward and be correspondingly arranged with rear side feeding zone, rear feeding plate is staggered with conveying roller
Setting, rear feeding plate and a lift drive mechanism are sequentially connected.After pipe fitting is transferred to base tail end one by one, if inspection
Measuring is qualified product, and preceding feeding plate rises qualified pipe fitting top to preceding feeding zone, if detecting is substandard products, rear feeding plate rises
By substandard products pipe fitting top to rear feeding zone.
The lift drive mechanism is arranged on the rack and is located at two-way pusher as a further improvement of the utility model,
Below component, lift drive mechanism is cylinder, oil cylinder, lead screw assembly or linear motor.The preceding feeding plate of lift drive mechanism drive,
Feeding plate moves up and down afterwards.
The pusher includes several is sequentially disposed from left to right as a further improvement of the utility model,
Support on base is provided with shaft one at the top of support, and shaft one is parallel with pipe fitting axis, and one end of shaft one, which is arranged with, to be fallen
Material wheel, blanking wheel is circumferential outside to be uniformly arranged several pusher arms, the setting corresponding with pipe fitting of pusher arm, pusher arm and conveying roller
It is mutually staggered, the shaft one is sequentially connected with rotary drive mechanism two.Rotary drive mechanism two drives each shaft one to rotate, and falls
Material wheel also rotates, and when shaft one rotates forward, pusher arm shifts pipe fitting onto front side feeding zone, and when shaft one inverts, pusher arm is by pipe fitting
Shift rear side feeding zone onto.
The rotary drive mechanism two includes being set in the another of the shaft one as a further improvement of the utility model,
The sprocket wheel one of one end, rest base are provided with shaft two, and shaft two is located at below base, are arranged with sprocket wheel two, chain in shaft two
Wheel one is connect with sprocket wheel two by chain drive, and the shaft two on adjacent two support is connected by cardan drive, any one
Sprocket wheel two and drive sprocket in shaft two are sequentially connected, and drive sprocket is connect through retarder with motor drive.Motor is through slowing down
Device drives drive sprocket rotation after slowing down, drive sprocket band movable sprocket two rotates, and each shaft two all realizes rotation；Sprocket wheel two drives
Sprocket wheel one rotates, and each shaft one, which is realized, to be rotated synchronously, and blanking wheel is rotated forward therewith, inverted.
As a further improvement of the utility model, the rotary drive mechanism one include it is several with each conveying roller one by one
Corresponding gear, gear is interior to be equipped with mutually perpendicular shaft three and shaft four, and shaft three and pipe fitting axis are flat
Row, shaft four are coaxially disposed with the wheel shaft of corresponding conveying roller, are arranged with bevel gear, two bevel gears in shaft three and shaft four
It intermeshes, one end of the shaft four is stretched out gear and passed with wheel shaft one end of corresponding conveying roller by shaft coupling
Gear is stretched out at dynamic connection, the both ends of the shaft three, and three extension end of shaft of two neighboring gear passes through
Universal joint is connected, and the shaft three of any one gear is connect with motor drive.Motor drives a shaft three to rotate, respectively
Gear is connected by universal joint, each to turn axle linkage, and shaft three drives shaft four to rotate by bevel gear, four band of shaft
Dynamic conveying roller rotation, each conveying roller realize linkage.
It is located at the shaft three of the gear on right side as a further improvement of the utility model, successively through universal
Section, pulley mechanism and motor drive connect.The technical solution make it is compact-sized, be laid out it is more reasonable.
The wheel shaft other end of the conveying roller is rotatably supported in bearing block as a further improvement of the utility model,
On, bearing block is fixed on base.
Pipe end registration mechanism, pipe end registration mechanism are provided on the base as a further improvement of the utility model,
Including several alignment plain-barreled rolls, each plain-barreled roll that is aligned is arranged in a one-to-one correspondence with each conveying roller, and the roll shaft for being aligned plain-barreled roll is transmitted with corresponding
The wheel shaft other end of idler wheel is sequentially connected by shaft coupling, and alignment plain-barreled roll is mounted on roller seat, and roller seat is fixedly linked with base, machine
Seat tail end is provided with the end plate that is aligned being connected with spring, is aligned end plate setting corresponding with plain-barreled roll is aligned, and is aligned at end plate and is equipped with
Close to switch.Being aligned on plain-barreled roll is front side feeding zone, and after qualified product pipe fitting falls on front side feeding zone, it is qualified that alignment plain-barreled roll drives
Quality control part is mobile towards alignment end plate, and qualified product pipe fitting is aligned, after detecting pipe fitting in place close to switch, subsequent conveying dress
It sets and qualified product pipe fitting is transferred in removal in the processing unit of weldering muscle.
The front side feeding zone is qualified product area as a further improvement of the utility model, and rear side feeding zone is substandard products
Area is provided with the detection sensor of detection qualified product pipe fitting and substandard products pipe fitting on the base.After pipe fitting is transferred to base tail end,
Detection sensor can detecte out qualified product and substandard products, qualified product blanking be fallen on front side feeding zone, after substandard products blanking is fallen on
Side feeding zone.
Detailed description of the invention
Fig. 1 is the top view of the utility model.
Fig. 2 is the partial enlarged view of Fig. 1.
Fig. 3 is the main view of the utility model.
Fig. 4 is the partial enlarged view of Fig. 3.
Fig. 5 is the enlarged drawing in Fig. 3 at A.
Fig. 6 is the left view of the utility model.
Fig. 7 is the location diagram of conveying roller and pipe fitting.
Fig. 8 is the main view of another pusher of the utility model.
Fig. 9 is the main view of another pusher of the utility model.
Figure 10 is the structural schematic diagram of base upper bracket.
Figure 11 is the top view of another pusher of the utility model.
Figure 12 is the side view of another pusher of the utility model.
Figure 13 is the structural schematic diagram of blanking wheel and pipe fitting.
Wherein, 1 base, 2 conveying rollers, feeding plate before 3, feeding plate after 4,5 lift drive mechanisms, 6 supports, 7 shafts one,
8 blanking wheels, 8a pusher arm, 9 sprocket wheels one, 10 shafts two, 11 sprocket wheels two, 12 chains, 13 universal joints, 14 drive sprockets, 15 slow down
Device, 16 motors, 17 gears, 17a shaft three, 17b shaft four, 17c bevel gear, 18 pulley mechanisms, 19 bearing blocks, 20
It is aligned plain-barreled roll, 21 roller seats, 22 alignment end plates, 23 springs, 24 pipe fittings.
Specific embodiment
Embodiment 1
As shown in figs. 1-7, it is a kind of bilateral doffer, including base 1, is from left to right arranged successively setting on base 1
There are several rotatable conveying rollers 2, conveying roller 2 is horizontally disposed, and each conveying roller 2, which is driven with rotary drive mechanism one, to be connected
Connect, pipe fitting 24 is horizontally supported on conveying roller 2, be provided on base 1 pipe fitting 24 can be pushed away respectively fall on front side feeding zone and
The pusher of rear side feeding zone, pusher are arranged in a staggered manner mutually with conveying roller 2.The pusher includes at least one set
Two-way pushing material component, two-way pushing material component include preceding feeding plate 3 and rear feeding plate 4, and two-way pushing material component is located at 24 lower section of pipe fitting,
It the incline upward of preceding feeding plate 3 and is correspondingly arranged with front side feeding zone, preceding feeding plate 3 is arranged in a staggered manner with conveying roller 2, preceding blanking
Plate 3 and a lift drive mechanism 5 are sequentially connected；It the incline upward of feeding plate 4 and is correspondingly arranged afterwards with rear side feeding zone, rear blanking
Plate 4 is arranged in a staggered manner with conveying roller 2, and rear feeding plate 4 and a lift drive mechanism 5 are sequentially connected.The setting of lift drive mechanism 5 exists
In rack and it is located at below two-way pushing material component, lift drive mechanism 5 is cylinder, oil cylinder, lead screw assembly or linear motor 16.Institute
Stating rotary drive mechanism one includes several and one-to-one gear 17 of each conveying roller 2, is set in gear 17
There is mutually perpendicular three 17a of shaft and four 17b of shaft, three 17a of shaft is parallel with 24 axis of pipe fitting, and four 17b of shaft is passed with corresponding
The wheel shaft of defeated idler wheel 2 is coaxially disposed, and is arranged with bevel gear 17c on four 17b of three 17a of shaft and shaft, two bevel gear 17c are mutual
Engagement, one end of four 17b of shaft are stretched out gear 17 and are driven with wheel shaft one end of corresponding conveying roller 2 by shaft coupling
Connection, gear 17, three extension end 17a of shaft of two neighboring gear 17 are stretched out in the both ends of three 17a of shaft
It is connected by universal joint 13, three 17a of shaft and motor 16 of any one gear 17 are sequentially connected.Tooth positioned at right side
Three 17a of shaft for taking turns transmission case 17 is successively sequentially connected through universal joint 13, pulley mechanism 18 and motor 16.Conveying roller 2
The wheel shaft other end is rotatably supported on bearing block 19, and bearing block 19 is fixed on base 1.Pipe end alignment machine is provided on base 1
Structure, pipe end registration mechanism include several alignment plain-barreled rolls 20, and each plain-barreled roll 20 that is aligned is arranged in a one-to-one correspondence with each conveying roller 2, are aligned
The roll shaft of plain-barreled roll 20 is sequentially connected with the wheel shaft other end of corresponding conveying roller 2 by shaft coupling, and alignment plain-barreled roll 20 is mounted on roller
On seat 21, roller seat 21 is fixedly linked with base 1,1 tail end of base be provided be connected with spring 23 be aligned end plate 22, alignment end plate
22 settings corresponding with plain-barreled roll 20 is aligned are aligned at end plate 22 and are equipped with close to switch.The front side feeding zone is qualified product area, after
Side feeding zone is substandard products area, and the detection sensor of detection qualified product pipe fitting 24 and substandard products pipe fitting 24 is provided on base 1.
When the present apparatus works, the pipe fitting 24 after more cutting formings is successively transferred on conveying roller 2, and motor 16 drives
One three 17a of shaft rotation, each gear 17 are connected by universal joint 13, each three 17a of shaft linkage, and three 17a of shaft is logical
It crossing bevel gear 17c and drives four 17b of shaft rotation, four 17b of shaft drives conveying roller 2 to rotate, and each conveying roller 2 realizes linkage,
Pipe fitting 24 is transmitted along base 1, after pipe fitting 24 is transferred to 1 tail end of base one by one, if detection sensor detects
It is qualified product, preceding feeding plate 3, which rises, arrives preceding feeding zone for qualified pipe fitting 24 top, if detecting is substandard products, rear feeding plate 4 rises
Rear feeding zone is arrived on the top of substandard products pipe fitting 24.Being aligned on plain-barreled roll 20 is front side feeding zone, and alignment plain-barreled roll 20 drives qualified product pipe fitting
24 is mobile towards alignment end plate 22, and qualified product pipe fitting 24 is aligned, after detecting pipe fitting 24 in place close to switch, subsequent conveying
Qualified product pipe fitting 24 is transferred in removal in the processing unit of weldering muscle by device.The advantages of present apparatus is: can be realized will close
Lattice quality control part 24 and substandard products pipe fitting 24 sort out, and qualified product pipe fitting 24 continues the removal of interior weldering muscle, then collect and are packaged；
After substandard products pipe fitting 24 is collected packing, it is recycled.The utility model can be used for cutting off the bilateral of the welded tube after forming
Blanking sorts out qualified product pipe fitting 24 and substandard products pipe fitting 24.
Embodiment 2
As shown in figures 8-13, with embodiment 1 the difference is that, the pusher include it is several from left to right according to
The support 6 on base 1 is arranged in minor tick, and the top of support 6 is provided with shaft 1, and shaft 1 is parallel with 24 axis of pipe fitting,
One end of shaft 1 is arranged with blanking wheel 8, has circumferentially been uniformly arranged several pusher arm 8a, pusher arm 8a and pipe fitting outside blanking wheel 8
24 corresponding settings, pusher arm 8a are mutually staggered with conveying roller 2, and shaft 1 and rotary drive mechanism two are sequentially connected.It is described
Rotary drive mechanism two includes the sprocket wheel 1 for being set in the other end of shaft 1, and 6 bottom of support is provided with shaft 2 10, shaft
2 10 are located at 1 lower section of base, are arranged with sprocket wheel 2 11, sprocket wheel 1 and sprocket wheel 2 11 in shaft 2 10 and are connected by the transmission of chain 12
Connect, the shaft 2 10 on adjacent two support 6 is sequentially connected by universal joint 13, the sprocket wheel 2 11 in any one shaft 2 10 with
Drive sprocket 14 is sequentially connected, and drive sprocket 14 is sequentially connected through retarder 15 and motor 16.
When work, motor 16 drives drive sprocket 14 to rotate after the deceleration of retarder 15, and drive sprocket 14 is with movable sprocket two
11 rotations, each shaft 2 10 all realize rotation；2 11 band movable sprocket 1 of sprocket wheel rotates, and each shaft 1, which is realized, to be rotated synchronously, and falls
Material wheel 8 is rotated forward therewith, is inverted.When shaft 1 rotates forward, pusher arm 8a shifts pipe fitting 24 onto front side feeding zone, and shaft 1 inverts
When, pusher arm 8a shifts pipe fitting 24 onto rear side feeding zone.
The utility model is not limited to above-described embodiment, on the basis of technical solution disclosed by the utility model, this
For the technical staff in field according to disclosed technology contents, not needing creative labor can be special to some of which technology
Sign makes some replacements and deformation, these replacements and deformation are within the protection scope of the present utility model.
Claims (10)
1. a kind of bilateral doffer, including base, which is characterized in that be provided with if being from left to right arranged successively on the base
Rotatable conveying roller is done, conveying roller is horizontally disposed, and each conveying roller is sequentially connected with rotary drive mechanism one, pipe fitting
It is horizontally supported on conveying roller, is provided with pipe fitting can be pushed away respectively on the base and falls on front side feeding zone and rear side feeding zone
Pusher, pusher is arranged in a staggered manner mutually with conveying roller.
2. a kind of bilateral doffer according to claim 1, which is characterized in that the pusher includes at least one set
Two-way pushing material component, two-way pushing material component include preceding feeding plate and rear feeding plate, and two-way pushing material component is located at below pipe fitting, described
It the incline upward of preceding feeding plate and is correspondingly arranged with front side feeding zone, preceding feeding plate is arranged in a staggered manner with conveying roller, preceding feeding plate
It is sequentially connected with a lift drive mechanism；It is described after feeding plate incline upward and be correspondingly arranged with rear side feeding zone, rear blanking
Plate is arranged in a staggered manner with conveying roller, and rear feeding plate and a lift drive mechanism are sequentially connected.
3. a kind of bilateral doffer according to claim 2, which is characterized in that the lift drive mechanism is arranged in machine
On frame and it is located at below two-way pushing material component, lift drive mechanism is cylinder, oil cylinder, lead screw assembly or linear motor.
4. a kind of bilateral doffer according to claim 1, which is characterized in that the pusher includes several from a left side
It is successively arranged at intervals on the support on base to the right side, is provided with shaft one at the top of support, shaft one is parallel with pipe fitting axis, turns
One end of axis one is arranged with blanking wheel, has circumferentially been uniformly arranged several pusher arms outside blanking wheel, pusher arm is corresponding with pipe fitting to be set
It sets, pusher arm is mutually staggered with conveying roller, and the shaft one is sequentially connected with rotary drive mechanism two.
5. a kind of bilateral doffer according to claim 4, which is characterized in that the rotary drive mechanism two includes set
It is located at the sprocket wheel one of the other end of the shaft one, rest base is provided with shaft two, and shaft two is located at below base, shaft two
On be arranged with sprocket wheel two, sprocket wheel one is connect with sprocket wheel two by chain drive, and the shaft two on adjacent two support passes through universal joint
It is sequentially connected, the sprocket wheel two and drive sprocket in any one shaft two are sequentially connected, and drive sprocket is passed through retarder and motor
Dynamic connection.
6. a kind of bilateral doffer according to claim 1-5, which is characterized in that the rotary drive mechanism
One includes several and one-to-one gear of each conveying roller, is equipped with mutually perpendicular three He of shaft in gear
Shaft four, shaft three is parallel with pipe fitting axis, and shaft four is coaxially disposed with the wheel shaft of corresponding conveying roller, shaft three and shaft four
On be arranged with bevel gear, two bevel gears intermesh, and one end of the shaft four is stretched out gear and simultaneously transmitted with corresponding
Wheel shaft one end of idler wheel is sequentially connected by shaft coupling, and gear, two neighboring tooth are stretched out in the both ends of the shaft three
Three extension end of shaft for taking turns transmission case is connected by universal joint, and the shaft three and motor drive of any one gear connect
It connects.
7. a kind of bilateral doffer according to claim 6, which is characterized in that the gear positioned at right side
Shaft three successively through universal joint, pulley mechanism and motor drive connect.
8. a kind of bilateral doffer according to claim 6, which is characterized in that the wheel shaft other end of the conveying roller
It is rotatably supported on bearing block, bearing block is fixed on base.
9. a kind of bilateral doffer according to claim 6, which is characterized in that be provided with pipe end alignment on the base
Mechanism, pipe end registration mechanism include several alignment plain-barreled rolls, and each plain-barreled roll that is aligned is arranged in a one-to-one correspondence with each conveying roller, are aligned plain-barreled roll
Roll shaft and the wheel shaft other end of corresponding conveying roller be sequentially connected by shaft coupling, alignment plain-barreled roll is mounted on roller seat, roller seat
It is fixedly linked with base, base tail end is provided with the end plate that is aligned being connected with spring, and end plate is corresponding with plain-barreled roll is aligned sets for alignment
It sets, is aligned at end plate and is equipped with close to switch.
10. a kind of bilateral doffer according to claim 1-5, which is characterized in that the front side feeding zone
For qualified product area, rear side feeding zone is substandard products area, and the detection of detection qualified product pipe fitting and substandard products pipe fitting is provided on the base
Sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821872436.XU CN209127593U (en) | 2018-11-14 | 2018-11-14 | A kind of bilateral doffer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821872436.XU CN209127593U (en) | 2018-11-14 | 2018-11-14 | A kind of bilateral doffer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209127593U true CN209127593U (en) | 2019-07-19 |
Family
ID=67245052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821872436.XU Active CN209127593U (en) | 2018-11-14 | 2018-11-14 | A kind of bilateral doffer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209127593U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109178901A (en) * | 2018-11-14 | 2019-01-11 | 江苏省南扬机械制造有限公司 | A kind of bilateral doffer |
| CN111942867A (en) * | 2020-08-07 | 2020-11-17 | 新昌县诚隆轴承厂 | Steel construction is top tube mechanism for production line |
| CN112496442A (en) * | 2020-12-19 | 2021-03-16 | 周开言 | A intelligent lathe for steel sheet production |
-
2018
- 2018-11-14 CN CN201821872436.XU patent/CN209127593U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109178901A (en) * | 2018-11-14 | 2019-01-11 | 江苏省南扬机械制造有限公司 | A kind of bilateral doffer |
| CN111942867A (en) * | 2020-08-07 | 2020-11-17 | 新昌县诚隆轴承厂 | Steel construction is top tube mechanism for production line |
| CN111942867B (en) * | 2020-08-07 | 2021-10-26 | 青岛鹏晓金属结构有限公司 | Steel construction is top tube mechanism for production line |
| CN112496442A (en) * | 2020-12-19 | 2021-03-16 | 周开言 | A intelligent lathe for steel sheet production |
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