CN209318664U - A kind of automatic charging device of screw-rolling machine - Google Patents
A kind of automatic charging device of screw-rolling machine Download PDFInfo
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- CN209318664U CN209318664U CN201822183046.8U CN201822183046U CN209318664U CN 209318664 U CN209318664 U CN 209318664U CN 201822183046 U CN201822183046 U CN 201822183046U CN 209318664 U CN209318664 U CN 209318664U
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- rolling machine
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Abstract
The utility model discloses a kind of automatic charging devices of screw-rolling machine, it is related to the technical field of rolled thread processing ancillary equipment, including board, the lifting of board upper surface is provided with top plate, and board upper surface is tiltedly installed with upper flitch in the side of top plate, and the other side is fixed with feeding platform, the fixed plate that feeding platform is obliquely installed, movable plate is hingedly connected on board, the free end of movable plate is abutted with fixed plate, is provided with blanking channel below movable plate；Feeding platform upper surface is respectively and fixedly provided with bracket in top plate both ends, and rotation is provided with crossbeam between two brackets, and crossbeam peripheral wall is fixed with multiple limit plates, and limit plate free end is abutted with feeding platform, and board upper surface is provided with adjusting component.The utility model realizes the automatic charging one by one of material bar, and feeding is more stable, while being suitable for the material bar of different model size, material bar can marshalling and orderly automatically into screw-rolling machine, improve the processing efficiency for expecting bar.
Description
Technical field
The utility model relates to rolled thread processing ancillary equipment technical field, more particularly, to a kind of screw-rolling machine it is automatic on
Expect device.
Background technique
Rolled thread cold rolling technique is a kind of advanced no machining, can effectively improve inherence and the surface matter of workpiece
Amount, the radial compressive stress that when processing generates, can significantly improve the fatigue strength and torsional strength of workpiece, be it is a kind of efficiently, energy conservation,
The ideal technology of low consumption.Come to carry out rolled thread processing to material bar usually using screw-rolling machine in existing processing.Screw-rolling machine is a kind of more function
Energy cold-extrusion shaping lathe, rolled thread function roll in pressure limit at it and carry out screw thread, straight grain, twill rolling etc. to workpiece under cold conditions
Processing；The rolling of straight-tooth, helical teeth and oblique spline gear；Alignment, undergauge, tumbling and various formings rolling.
Patent announcement number is the Chinese patent of CN207479480U, proposes a kind of screw-rolling machine, including support plate, support plate
The two sides of bottom are fixedly connected to supporting leg, and screw-rolling machine ontology, the positive table of screw-rolling machine ontology are fixedly connected at the top of support plate
The bottom in face is connected with driven cylinder, and fixed plate, screw-rolling machine ontology are fixedly connected on the left of screw-rolling machine ontology front surface
Movable plate is connected on the right side of front surface.The utility model passes through setting metal decking, metallic rod, winding conducting wire, electric power storage
Pond, conductor rods, movable conductor ring, electric telescopic rod, insulation board and conducting wire can generate magnetic principle by electrified wire
Metal decking is set to generate the performance for attracting metal, therefore the metal debris that can be generated to screw thread process process is attracted and received
Collection, ensure that the normal operation of equipment.
It is fixed that prior art among the above has the following deficiencies: that screw-rolling machine needs master worker to feed manually in feeding
Position, screw-rolling machine again to material bar carry out rolled thread processing, can not operate simultaneously more machines, not only increased the workload of master worker but also
It is difficult to improve production efficiency.
Utility model content
The purpose of the utility model is to provide a kind of automatic charging devices of screw-rolling machine for being adapted to a variety of material bars.
The utility model has the technical scheme that
A kind of automatic charging device of screw-rolling machine, including board, the board upper surface lifting are provided with top plate, the machine
Platform upper surface is tiltedly installed with upper flitch in the side of the top plate, and the other side is fixed with feeding platform, and the feeding platform is far from institute
The side for stating upper flitch is fixed with the fixed plate being obliquely installed, and the side edge of the board upper surface far from the upper flitch is hinged
It is connected with movable plate, the free end of the movable plate is abutted with the fixed plate, is provided with blanking channel below the movable plate；
The feeding platform upper surface is respectively and fixedly provided with bracket in the top plate both ends, rotates and is provided between two brackets
Crossbeam, the crossbeam peripheral wall are fixed with multiple limit plates, and the limit plate free end is abutted with the feeding platform, on the board
End face is provided with the adjusting component for driving the crossbeam and the movable plate to rotate synchronously.
By using above-mentioned technical proposal, the material bar to rolled thread is placed in upper flitch, under the effect of gravity, expects bar edge
The inclined-plane of upper flitch tumbles the intersection to upper flitch and feeding platform, and top plate, which will rise, to expect on bar top to feeding platform, by limit plate
Stop to expect that bar is fixed on feeding platform, then adjusts Component driver crossbeam and drive limit plate rotation, material bar loses limit plate
Support along the abutting that feeding platform falls into fixed plate and movable plate, then adjust Component driver movable plate towards far from fixed plate
Side rotation, material bar fall into blanking channel.The utility model realizes the automatic charging one by one of material bar, and feeding is more stable,
Be suitable for the material bar of different model size simultaneously, material bar can marshalling and orderly automatically into screw-rolling machine, improve and expect bar
Processing efficiency.
Be further arranged to: the limit plate plate face offers notch, is equipped in the notch and the crossbeam peripheral wall
The caging bolt being screwed.
By using above-mentioned technical proposal, limit plate is bolted on crossbeam, is fixed on slot on limit plate by caging bolt
The different location adjustment limit plate lower end of mouth adapts to the demand of different-diameter material bar close to the distance of feeding platform, realizes automatic
Feeding device is applicable to the effect of different-diameter material bar, improves the utilization rate and economy of equipment.
Be further arranged to: the movable plate is fixed with multiple fixed knots, multiple fixations far from the side of the fixed plate
Bull stick is equipped in section, the bull stick is fixedly connected by the fixed knot with the movable plate, and the board upper surface is in leaning on
Multiple rotating cylinders are fixed at the nearly movable plate, the bull stick, which rotates coaxially, to be arranged in the rotating cylinder, the fixed knot and institute
It states and is fixedly connected with torsional spring between rotating cylinder.
By using above-mentioned technical proposal, when movable plate with bar rotation far from fixed plate when, torsional spring stress generates deformation,
When adjusting component stopping driving movable plate, driven by torsional spring torsion, movable plate can rotate immediately to abut with fixed plate, realizes work
Movable plate automatically resets, and fixed plate and movable plate can abut in time when preventing because of mechanical breakdown, to avoid more expecting that bar falls
The screw-rolling machine for entering lower section causes production order entanglement.
Be further arranged to: the adjusting component includes the feeding hydraulic cylinder for being fixed on the board upper surface, it is described on
Link assembly is provided between the piston rod of feed liquid cylinder pressure and the crossbeam and the bull stick, the link assembly includes two
The connecting rod being hingedly connected to one another.
By using above-mentioned technical proposal, feeding Hydraulic Cylinder piston rod is moved down, link assembly push crossbeam rotation with
The limit plate on crossbeam is caused to rotate towards the direction far from feeding platform, link assembly pushes bar rotation so that movable plate on bull stick
It is rotated towards the direction close to fixed plate, the material bar on feeding platform, which tumbles, at this time falls at the abutting of fixed plate and movable plate, realizes
The driving synchronous with bull stick to crossbeam of feeding hydraulic cylinder, simplifies the driving part of feeding device.
Be further arranged to: the feeding platform upper end is fixed with the boss along the feeding platform length direction, the feeding
Platform table top is fixed with a plurality of flange that direction setting is tumbled along material.
By using above-mentioned technical proposal, feeding platform upper end setting boss guarantee top plate will expect to have after feeding platform on bar top and
Only a material bar rests on feeding platform, to ensure that the feeding accuracy of automatic charging device, flange compares feeding platform
Table top reduces the contact area with material bar, so that frictional force is smaller, material bar tumbles speed faster, when shortening material bar and tumbling
Between.
Be further arranged to: the boss upper surface be inclined-plane and its be higher than close to the side of the upper flitch close to described
The side of fixed plate.
By using above-mentioned technical proposal, bar is expected by after on Roof to boss, boss is higher than close to the side of upper flitch
Close to the side of fixed plate, material bar is stuck in the clip slot that boss and limit plate are constituted, will not be because of mechanical oscillation and on rolling back to
Flitch.
It is further arranged to: being provided with lifting cylinder in the board, the piston rod end of the lifting cylinder is fixed on
The top plate lower end, the top plate upper end is arranged in inclined-plane and the side of the close upper flitch is higher.
By using above-mentioned technical proposal, lift cylinders drive top plate automation lifting, pause on top plate and guarantee in inclined-plane setting
The accuracy rate that top plate jacks up material bar is higher, and material bar will not slide halfway.
Be further arranged to: fixed plate one end sliding is provided with the positioning moved along the fixed plate length direction
Plate, the board upper end are fixed with pusher hydraulic cylinder, and the piston rod of the pusher hydraulic cylinder is fixedly connected with the positioning plate, institute
It states fixed plate and is fixed with baffle in one end far from the positioning plate.
By using above-mentioned technical proposal, the piston rod of pusher hydraulic cylinder pushes positioning plate that will expect that bar is connected on baffle,
Convenient for expecting the positioning of bar.
Be further arranged to: the upper flitch upper surface offers multiple threaded holes and is movably set with striker plate, described
Multiple positioning bolts being screwed with the threaded hole are equipped in striker plate.
By using above-mentioned technical proposal, when expecting that bar is deposited in upper flitch, end has irregular more, influences on subsequent
Expect operation, can be smooth to material bar progress in the striker plate in upper flitch by sliding, or screw positioning bolt and consolidate striker plate
It lives calmly, avoids material bar and stack the irregular influence to feeding operation.
To sum up, the advantageous effects of the utility model are as follows:
(1) synchronous rotation of limit plate and movable plate can be driven by link assembly, thus realize the feeding one by one of material bar,
Feeding process is stable and feeding is orderly, has ensured the accuracy of automatic charging；
(2) limit plate opens up notch and is fixed on crossbeam, limit plate can be realized to not by adjusting the fixed position of limit plate
With the limit of diameter material bar；
(3) feeding hydraulic cylinder is connect with crossbeam and bull stick by link assembly, realizes an actuator while driving two
A component cooperates, and simplifies mechanism setting.
Detailed description of the invention
Fig. 1 is the overall structure diagram one of the utility model；
Fig. 2 is the overall structure diagram two of the utility model；
Fig. 3 is the cross-sectional view of the line A-A along Fig. 2；
Fig. 4 is the portion B partial enlarged view in Fig. 2.
Appended drawing reference: 1, board；2, upper flitch；3, feeding platform；4, top plate；5, fixed plate；6, movable plate；7, blanking is logical
Road；8, bracket；9, crossbeam；10, limit plate；11, notch；12, caging bolt；13, bull stick；14, fixed knot；15, rotating cylinder；16,
Torsional spring；17, feeding hydraulic cylinder；18, connecting rod；19, boss；20, flange；21, lifting cylinder；22, positioning plate；23, pusher is hydraulic
Cylinder；24, baffle；25, threaded hole；26, positioning bolt；27, striker plate.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
It referring to Figure 1 and Figure 3, is a kind of automatic charging device of screw-rolling machine disclosed by the utility model, including board 1, machine
The lifting of 1 upper surface of platform is provided with top plate 4, and 1 upper surface of board is tiltedly installed with upper flitch 2 in the side of top plate 4, and the other side is fixed
There is feeding platform 3, lifting cylinder 21 is fixed with inside board 1 and drives the top plate 4 through 1 upper surface of board along feeding platform 3 close to upper
The side wall lifting carriage of flitch 2,4 upper surface of top plate in inclined-plane be arranged and inclined-plane close to the side of upper flitch 2 be higher than its close to upper
Expect the side of platform 3.Material bar is deposited in upper flitch 2, by its own gravity, is expected that bar is rolled down to close to the top of top plate 4, is risen
Sending down abnormally ascending cylinder 21 drives top plate 4 to jack up on material bar to feeding platform 3, and the inclined-plane of 4 upper end of top plate, which ensure that, expects bar not in uphill process
It can fall back in upper flitch 2, and the inclined-plane when rising to top of top plate 4 can also provide certain thrust and above push away material bar from top plate 4
To feeding platform 3.
Referring to Fig.1 and Fig. 4,3 upper surface of feeding platform are set as inclined-plane, and it is fixed to be located at 4 both ends of top plate on 1 upper surface of board
There is bracket 8, rotating turret is equipped with crossbeam 9 between two brackets 8, is equidistantly fixed with multiple limit plates 10 on 9 peripheral wall of crossbeam, limits
The setting orthogonal with crossbeam 9 of plate 10.10 side wall of limit plate offers notch 11 along its length, and limit spiral shell is equipped in notch 11
Bolt 12, caging bolt 12 cooperate fixed limit plate 10 in 9 peripheral wall of crossbeam, 10 free end of limit plate and feeding by bolting with nut
Platform 3 abuts.After expecting that bar is pushed up by top plate 4 onto feeding platform 3, limit plate 10 is abutted with feeding platform 3 is clamped in feeding platform 3 for material bar
On；10 lower end of limit plate is adjusted close to feeding platform 3 by the different location that caging bolt 12 is fixed on notch 11 on limit plate 10
Distance to adapt to the demand of different-diameter material bar, realize the effect that automatic charging device is applicable to different-diameter material bar,
Improve the utilization rate and economy of equipment.
Referring to Fig. 2 and Fig. 3,3 upper surface of feeding platform is fixed with close to the end of upper flitch 2 and sets along 3 length direction of feeding platform
The boss 19 set, 19 upper surface of boss is for inclined-plane and higher close to the side of upper flitch 2, between also waiting on the upper surface of feeding platform 3
Away from a plurality of flange 20 for tumbling direction along material bar is fixed with, flange 20 is arranged in wave.After expecting on bar top to boss 19, boss
19 with the clamping material bar of limit plate 10, prevent material bar from rolling back upper flitch 2, after limit plate 10 is far from feeding platform 3, expect bar along feeding platform 3
Inclined-plane slides, and the flange 20 on inclined-plane reduces the frictional force with material bar, and material bar gliding speed is faster.
Referring to Figure 1 and Figure 3, feeding platform 3 is fixed with the fixed plate 5 being obliquely installed far from the side of upper flitch 2, on board 1
End face is hingedly connected with movable plate 6 far from the side edge of upper flitch 2, and pivot center and the fixed plate 5 of movable plate 6 are arranged in parallel,
The free end of movable plate 6 is abutted with the lower end of fixed plate 5, and the two forms " V " font, board after fixed plate 5 is abutted with movable plate 6
Blanking channel 7 is offered in the underface of movable plate 6 on 1.7 face screw-rolling machine of blanking channel.
Movable plate 6 is equipped with bull stick 13 in the side of fixed plate 5, and multiple fixed knots 14 are fixed on bull stick 13, turns
Bar 13 is fixedly connected by fixed knot 14 with movable plate 6, and 1 upper surface of board is fixed with multiple rotating cylinders 15 at close movable plate 6,
Bull stick 13, which rotates coaxially, to be arranged in rotating cylinder 15, and torsional spring 16 is fixedly connected between fixed knot 14 and rotating cylinder 15.Movable plate 6 drives
Bull stick 13 is rotated far from fixed plate 5, and the material bar at 6 abutting of fixed plate 5 and movable plate is fallen into the blanking channel 7 of lower section, is turned
16 stress of torsional spring generates deformation after bar 13 rotates, and is driven by 16 torsion of torsional spring, and movable plate 6 can rotate immediately to abut with fixed plate 5,
Realize automatically reseting for movable plate 6.
Referring to Figures 1 and 2,1 upper surface of board is fixed with feeding hydraulic cylinder 17, feeding hydraulic cylinder 17 in the end of crossbeam 9
Piston rod be directed toward board 1 and it is provided with link assembly between crossbeam 9 and bull stick 13, link assembly include two mutually
The connecting rod 18 of articulated connection.Feeding hydraulic cylinder 17 pushes piston rod to move down, and link assembly pushes the rotation of crossbeam 9 so that on crossbeam 9
Limit plate 10 towards far from feeding platform 3 direction rotate, while link assembly push bull stick 13 rotate so that on bull stick 13
Movable plate 6 towards close to fixed plate 5 direction rotate, the material bar on feeding platform 3, which tumbles, at this time falls into fixed plate 5 and movable plate 6
Abutting at, realize feeding hydraulic cylinder 17 it is synchronous with bull stick 13 to crossbeam 9 driving, simplify the driving portion of feeding device
Part.
Referring to Fig.1,5 one end of fixed plate, which slides, is provided with the positioning plate 22 moved along 5 length direction of fixed plate, on board 1
End face is fixed with pusher hydraulic cylinder 23, and the piston rod of pusher hydraulic cylinder 23 is fixedly connected with positioning plate 22, and fixed plate 5 is in far from fixed
One end of position plate 22 is fixed with baffle 24, and baffle 24 and positioning plate 22 are arranged in parallel.Material bar is fallen in fixed plate 5 and activity
After at 6 abutting of plate, the piston rod of pusher hydraulic cylinder 23 pushes positioning plate 22 that will expect that bar is connected on baffle 24, convenient for determining for material bar
Position and subsequent processing.
Referring to Fig. 2, when material bar is deposited in upper flitch 2, end has irregular more, influences subsequent feeding operation, feeding
2 plate face of plate offers multiple threaded holes 25, and threaded hole 25 is arranged in two rows, and 2 upper surface of upper flitch slides along its length to be set
It is equipped with striker plate 27, the both ends of striker plate 27 are equipped with positioning bolt 26, and positioning bolt 26 is screwed with threaded hole 25.It is logical
It is smooth in 27 pairs of material bars progress of striker plate in upper flitch 2 to cross sliding, screws positioning bolt 26 and fixes striker plate 27, avoid
Material bar stacks the irregular influence to feeding operation.
It the implementation principle of the present embodiment and has the beneficial effect that
Material bar is deposited in upper flitch 2, and lifting cylinder 21 drives top plate 4 to jack up the material bar in upper flitch 2, and material bar is pushed away
Onto boss 19, limit plate 10 and boss 19 form grasping part, have and only a material bar is located in grasping part.Upper feed liquid
Cylinder pressure 17 starts, and drives limit plate 10 to rotate towards the direction far from boss 19 by link assembly, expects bar by gravity along upper
Material 3 inclined-plane of platform is slides quickly at the abutting of fixed plate 5 and movable plate 6, and feeding hydraulic cylinder 17 is driven by link assembly live simultaneously
Movable plate 6 is rotated towards the direction far from fixed plate 5, is between fixed plate 5 and movable plate 6 and is expected that bar is fallen into blanking channel 7,
And the screw-rolling machine for carrying out lower section carries out following process.
The utility model realizes the automatic charging one by one of material bar, and feeding is more stable, link assembly linkage area
The synchronous rotation of dynamic limit plate 10 and movable plate 6, simplifies driving mechanism, while being suitable for the material bar of different model size, expects
Bar can marshalling and orderly automatically into screw-rolling machine, improve the material subsequent processing efficiency of bar.
The embodiment of present embodiment is the preferred embodiment of the utility model, and not limitation is originally practical new according to this
The protection scope of type, therefore: the equivalence changes that all structures, shape, principle according to the utility model are done should all be covered by practical
Within novel protection scope.
Claims (9)
1. a kind of automatic charging device of screw-rolling machine, which is characterized in that including board (1), board (1) the upper surface lifting is set
It is equipped with top plate (4), board (1) upper surface is tiltedly installed with upper flitch (2) in the side of the top plate (4), and the other side is solid
Surely having feeding platform (3), the feeding platform (3) is fixed with the fixed plate (5) being obliquely installed far from the side of the upper flitch (2),
Board (1) upper surface is hingedly connected with movable plate (6) far from the side edge of the upper flitch (2), the movable plate (6)
Free end is abutted with the fixed plate (5), is provided with blanking channel (7) below the movable plate (6)；
Feeding platform (3) upper surface is respectively and fixedly provided with bracket (8) in the top plate (4) both ends, is turned between two brackets (8)
Dynamic to be provided with crossbeam (9), crossbeam (9) peripheral wall is fixed with multiple limit plates (10), limit plate (10) free end and institute
Feeding platform (3) abutting is stated, board (1) upper surface is provided with for driving the crossbeam (9) synchronous with the movable plate (6)
The adjusting component of rotation.
2. the automatic charging device of screw-rolling machine according to claim 1, it is characterised in that: limit plate (10) plate face offers
Notch (11), the notch (11) is interior to be equipped with the caging bolt (12) being screwed with the crossbeam (9) peripheral wall.
3. the automatic charging device of screw-rolling machine according to claim 2, it is characterised in that: the movable plate (6) is far from described solid
The side of fixed board (5) is fixed with multiple fixed knots (14), is equipped with bull stick (13) in multiple fixed knots (14), the bull stick (13)
It is fixedly connected by the fixed knot (14) with the movable plate (6), board (1) upper surface is in close to the movable plate
(6) it is fixed at multiple rotating cylinders (15), the bull stick (13) rotates coaxially setting in the rotating cylinder (15), the fixed knot
(14) it is fixedly connected between the rotating cylinder (15) torsional spring (16).
4. the automatic charging device of screw-rolling machine according to claim 1, it is characterised in that: the adjusting component includes being fixed on institute
State the feeding hydraulic cylinder (17) of board (1) upper surface, the piston rod of the feeding hydraulic cylinder (17) and the crossbeam (9) and described
Link assembly is provided between bull stick (13), the link assembly includes two connecting rods being hingedly connected to one another (18).
5. the automatic charging device of screw-rolling machine according to claim 1, it is characterised in that: feeding platform (3) upper end is fixed with
Along the boss (19) of the feeding platform (3) length direction, feeding platform (3) table top is fixed with a plurality of edge and expects that bar tumbles direction and sets
The flange (20) set.
6. the automatic charging device of screw-rolling machine according to claim 5, it is characterised in that: boss (19) upper surface is inclined-plane
And it is higher than close to the side of the upper flitch (2) close to the side of the fixed plate (5).
7. the automatic charging device of screw-rolling machine according to claim 1, it is characterised in that: be provided with lifting in the board (1)
Cylinder (21), the piston rod end of the lifting cylinder (21) are fixed on the top plate (4) lower end, and top plate (4) upper end is in
The side of inclined-plane setting and close the upper flitch (2) is higher.
8. the automatic charging device of screw-rolling machine according to claim 1, it is characterised in that: fixed plate (5) one end sliding is set
It is equipped with the positioning plate (22) along the movement of the fixed plate (5) length direction, board (1) upper end is fixed with pusher hydraulic cylinder
(23), the piston rod of the pusher hydraulic cylinder (23) is fixedly connected with the positioning plate (22), and the fixed plate (5) is in far from institute
The one end for stating positioning plate (22) is fixed with baffle (24).
9. the automatic charging device of screw-rolling machine according to claim 1, it is characterised in that: upper flitch (2) upper surface opens up
There are multiple threaded holes (25) and be movably set with striker plate (27), the multiple and threaded hole is equipped in the striker plate (27)
(25) positioning bolt (26) being screwed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822183046.8U CN209318664U (en) | 2018-12-24 | 2018-12-24 | A kind of automatic charging device of screw-rolling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822183046.8U CN209318664U (en) | 2018-12-24 | 2018-12-24 | A kind of automatic charging device of screw-rolling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209318664U true CN209318664U (en) | 2019-08-30 |
Family
ID=67728453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822183046.8U Expired - Fee Related CN209318664U (en) | 2018-12-24 | 2018-12-24 | A kind of automatic charging device of screw-rolling machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209318664U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110788416A (en) * | 2019-10-09 | 2020-02-14 | 甘肃省产品质量监督检验研究院 | Feeding system capable of simultaneously rolling threads at two ends of reinforcing steel bar |
-
2018
- 2018-12-24 CN CN201822183046.8U patent/CN209318664U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110788416A (en) * | 2019-10-09 | 2020-02-14 | 甘肃省产品质量监督检验研究院 | Feeding system capable of simultaneously rolling threads at two ends of reinforcing steel bar |
| CN110788416B (en) * | 2019-10-09 | 2021-08-20 | 甘肃省产品质量监督检验研究院 | Feeding system capable of simultaneously rolling threads at two ends of reinforcing steel bar |
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Granted publication date: 20190830 Termination date: 20211224 |