CN207668409U - Oil press for forging - Google Patents
Oil press for forging Download PDFInfo
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- CN207668409U CN207668409U CN201721638637.9U CN201721638637U CN207668409U CN 207668409 U CN207668409 U CN 207668409U CN 201721638637 U CN201721638637 U CN 201721638637U CN 207668409 U CN207668409 U CN 207668409U
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- oil
- way
- forging
- directional control
- control valve
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Abstract
The utility model discloses oil press for forging, including forging and pressing workbench, at least three guide posts being fixedly connected with forging and stamping workbench, the oil pressure machine walking beam being slidably matched with guide post, the hydraulic press for being fixedly connected on guiding column end determines beam, it is fixed at hydraulic press and determines the oil cylinder on beam and the first oil pump of drive cylinder work, the piston rod of oil cylinder is fixedly connected with oil pressure machine walking beam, the input terminal of first oil pump is connected with fuel tank, output end is connected by oil pipe with oil cylinder, first reversal valve is set on oil pipe, it further include the oil piping system for making its pushing process of cylinder efficient stroke become faster.The utility model so that the impulse stroke of forging shortens and frequency increases, and forges its mechanical performance of wind power principal axis come in this way and forges the wind power principal axis come better than conventional forging hydraulic press；And realize that the backhaul in impulse stroke is fast and process is slowly to meet requirement when forging by the special setting of sliding rail shape；And it can realize quick idle stroke by the setting of ladder oil cylinder, save working hour.
Description
Technical field
The utility model is related to oil press for forging.
Background technology
For hydraulic press in eharge stroke, backhaul, aided process and smaller required operating pressure, hydraulic pump all cannot be abundant
It utilizes, especially the hydraulic press of large-tonnage, usage factor are very low.Therefore, hydraulic press tends to operating rate and operating pressure
Carry out stepped transmission.
Utility model content
The purpose of this utility model is that overcoming defect existing in the prior art, oil press for forging is provided, forging
Impulse stroke shortens and frequency increases, and it is excellent to forge wind power principal axis its mechanical performance come；Pass through the special setting of sliding rail shape
Realize that backhaul in impulse stroke is fast and process is slowly to meet requirement when forging.
To achieve the above object, the technical solution of the utility model is a kind of oil press for forging of design, including forging and stamping work
Make platform, at least three guide posts being fixedly connected with forging and stamping workbench, the oil pressure machine walking beam being slidably matched with guide post, fixed company
It is connected on and is oriented to the hydraulic press of column end and determine beam, is fixed at that hydraulic press determine oil cylinder on beam and that drive cylinder works is first oily
Pump, the piston rod of oil cylinder is fixedly connected with oil pressure machine walking beam, and the input terminal of the first oil pump is connected with fuel tank, output end by oil pipe and
Oil cylinder is connected, and the first reversal valve is arranged on oil pipe, further includes the oil piping system for making its pushing process of cylinder efficient stroke become faster.Packet
Include forging and stamping workbench, at least three guide posts being fixedly connected with forging and stamping workbench, the oil hydraulic press dynamic being slidably matched with guide post
Beam is fixedly connected on and is oriented to the hydraulic press of column end and determines beam, be fixed at hydraulic press and determine the oil cylinder on beam and drive cylinder work
The piston rod of the oil pump of work, oil cylinder is fixedly connected with oil pressure machine walking beam, and the input terminal of oil pump is connected with fuel tank, and output end passes through oil pipe
It is connected with oil cylinder, reversal valve is set on oil pipe, further includes the slider-crank mechanism for making change-over valve core fast reciprocating move.Crank
Slide block mechanism makes the movement of change-over valve core fast reciprocating become larger with frequency when realizing forging, the wind power principal axis forged in this way
Mechanical performance is more preferable, also improves efficiency.Oil cylinder can also be arranged to ladder oil cylinder, i.e. setting is one small on a large tank
The piston rod of oil cylinder, small oil tank is fixedly connected on the piston of large tank, and by three oil pipes, (one is connected in small oil tank again in this way
Rodless cavity on, another two be connected in respectively on the rod chamber of large tank and rodless cavity on) setting quick null may be implemented
Journey, and impulse stroke then realizes the forging of wind power principal axis with large tank, then coordinate above-mentioned slider-crank mechanism that can realize height
The forging of frequency forges the wind power principal axis of good mechanical performance.
Further technical solution is that oil piping system includes the second oil pump, and first reversal valve commutates for 3-position 4-way
Switch contact is arranged in valve on a side wall of the first reversal valve, and switch contact is electrically connected with controller, controller and electromagnetism
Ferroelectricity connects, and electromagnet controls the spool movement of the second reversal valve after being powered, and the second reversal valve is that two four-way electromagnetics commutate
Valve, the second reversal valve are arranged on the oil pipe that the second oil pump is connected with oil cylinder.In this way in rod chamber oil inlet of the oil pump to oil cylinder
The second oil pump also rod chamber oil inlet to oil cylinder simultaneously so that the backhaul forged in process (i.e. impulse stroke) becomes faster, and improves
Efficiency saves working hour.
Further technical solution is that the output end of the first oil pump is connected with the P of three position four-way directional control valve mouths, 3-position 4-way
The A mouths of reversal valve are connected with the rodless cavity of oil cylinder, and the rod chamber of oil cylinder is connected by oil pipe with the B of three position four-way directional control valve mouths,
The T mouths of three position four-way directional control valve are connected with fuel tank.
Further technical solution is that the output end of the second oil pump is connected with the P of two four-way electromagnetic reversing valves mouths, two
The A mouths of four-way electromagnetic reversing valve are connected with the rodless cavity of oil cylinder, and the rod chamber of oil cylinder is commutated by oil pipe and two four-way electromagnetics
The B mouths of valve are connected, and the T mouths of two four-way electromagnetic reversing valves are connected with fuel tank.
Further technical solution is that oil piping system includes the crude oil pipe and and oil cylinder rodless being connected with cylinder rod chamber
The connected thin oil pipe of chamber, first reversal valve are three position four-way directional control valve, the B mouth phases of crude oil pipe and three position four-way directional control valve
Even, the T mouths of three position four-way directional control valve are connected with fuel tank；Thin oil pipe is connected with the A of three position four-way directional control valve mouths, 3-position 4-way commutation
The P mouths of valve are connected with the output end of the first oil pump.In rod chamber oil inlet of the oil pump to oil cylinder, flow becomes larger in this way so that forges
Backhaul in process (i.e. impulse stroke) becomes faster, and improves efficiency, saves working hour.
Further technical solution is that oil piping system includes being arranged in first to be connected with the first oil pump output end on oil pipe
2/2-way solenoid directional control valve and an oil return speedup oil pipe that cylinder rod chamber is connected to from oil cylinder rodless cavity, oil return speedup oil pipe
The second 2/2-way solenoid directional control valve of upper setting；First reversal valve is three position four-way directional control valve, the two of the first reversal valve
Switch contact is set on a side wall, and switch contact is electrically connected with controller, and controller is changed with the first 2/2-way electromagnetism respectively
The electromagnet of electromagnet and the second 2/2-way solenoid directional control valve to valve is electrically connected, control the first two after electromagnet is powered
The spool of two electric change valves or the second 2/2-way solenoid directional control valve moves.Rodless cavity oil inlet in this way in from oil pump to oil cylinder
When (when that position of the left side of three position four-way directional control valve communicates) the first 2/2-way solenoid directional control valve communicate, and the second two
Two electric change valve access failures, normal work is into being forged at this time, in rod chamber oil inlet of the oil pump to oil cylinder (three four
When logical that position of the right of reversal valve communicates) the second 2/2-way solenoid directional control valve communicates, and the first 2/2-way electromagnetism changes
To valve access failure, then the oil of rodless cavity returns to rod chamber so that the flow of this process becomes larger, and (i.e. oil return returns at oil inlet：Have
Rod cavity that), accelerate the speed of backhaul in forging process so that the backhaul forged in process (i.e. impulse stroke) becomes faster, improve
Efficiency, saves working hour.
Further technical solution is that reversal valve is three position four-way directional control valve.
Further technical solution is that the ex-situ operations portion of its spool of three position four-way directional control valve is operating lever.
Another technical solution is that the ex-situ operations portion of its spool of three position four-way directional control valve is the convex block that can be moved left and right,
It is integrally formed or is fixedly installed with spool, slot of the setting for convex block translation on valve body, and convex block stretches out slot, notch setting closing
Sealing ring is arranged with wrinkle piece is folded in the folding wrinkle piece of slot, convex block.
Further technical solution is that slider-crank mechanism includes a sliding slot being fixedly installed and is slidably arranged in sliding slot
Interior sliding block, the first connecting rod being rotatably connected on sliding block are rotatably connected on the second connecting rod of first connecting rod end, second connecting rod
With first connecting rod junction its backwards to first connecting rod surface pivots be arranged roller；Further include the fixed plate equipped with sliding rail, it is sliding
Rail is adapted with roller, is located at the sustained height that fixed plate is generally aligned in the same plane with sliding slot, in fixed plate at sliding rail center and is turned
The guide pad of dynamic setting rectangular tubular, second connecting rod are inserted into guide pad, and sliding block passes through connector and convex block or operating lever phase
Even.
Further technical solution is that the shape of sliding rail is to be made of the semiellipse of the semicircle of upper semisection and lower semisection.This
Sample can realize that the speed that sliding block is translated to one side is slower than the speed translated to another side.
Further technical solution is that connector is connecting pole or connecting rod, is fixedly connected on convex block.Such sliding block
Reciprocating motion i.e. realize spool reciprocating motion to realize being switched fast for oil circuit.
Further technical solution is that connector includes connecting rod, and one end is fixedly connected in shoe surface, the other end
It is rotatably connected on operating lever.The reciprocating motion of sliding block in this way realizes that operating lever swings back and forth to realize the quick of oil circuit
Switching.
Further technical solution is that the output end of oil pump is connected with the P of three position four-way directional control valve mouths, 3-position 4-way commutation
The A mouths of valve are connected with the rodless cavity of oil cylinder, and the rod chamber of oil cylinder is connected by oil pipe with the B of three position four-way directional control valve mouths, three
The T mouths of four-way reversing valve are connected with fuel tank.
Further technical solution is that motor is arranged in fixed plate in the one side of guide pad, and motor shaft, which passes through, to be fixed
Plate is connected with guide pad, flywheel of the fixed setting for energy storage on motor shaft.In this way after electric motor starting, guide pad rotation is inserted into
Second connecting rod in guide pad and then rotates, due to its end set of second connecting rod and the matched roller of sliding rail, second
Connecting rod has stretching motion also relative to guide pad when rotated, and due to the rotation of second connecting rod, first connecting rod back and forth pushes sliding block
The alternating translational for realizing sliding block, thereby realizes the alternating translational of spool, realizes being switched fast for oil circuit.The setting of flywheel
Play the role of energy storage, certain electric energy can be saved.Sliding slot and fixed plate can be fixed on a pedestal, pedestal away from
Not far from hydraulic press, the position of sliding slot and fixed plate is advisable with the convex block or operating lever that facilitate connection reversal valve；Fixed plate
It is preferably shaped to discoid.
The advantages of the utility model and advantageous effect are：The utility model makes the impulse stroke of forging shorten and frequency
It increases, forges its mechanical performance of wind power principal axis come in this way and forge the wind power principal axis come better than conventional forging hydraulic press；And
And realize that the backhaul in impulse stroke is fast and process is slowly to meet requirement when forging by the special setting of sliding rail shape；And
Quick idle stroke can be realized by the setting of ladder oil cylinder, save working hour；Slider-crank mechanism so that change-over valve core is quick
Reciprocating movement is become larger with frequency when realizing forging, and the wind power principal axis mechanical performance forged in this way is more preferable, also improves efficiency.
Description of the drawings
Fig. 1 is that the utility model oil press for forging embodiment one removes the schematic diagram after oil pump, slider-crank mechanism；
Fig. 2 is the hydraulic circuit figure for the oil pump part being connected with oil cylinder；
Fig. 3 is the sectional side elevation of reversal valve in Fig. 2；
Fig. 4 is the decomposition diagram of slider-crank mechanism and reversal valve；
Fig. 5 is the status diagram that sliding block moves to left end in Fig. 4；
Fig. 6 is the right view after Fig. 4 removal sliding slot sliding blocks；
Fig. 7 is the right view after Fig. 5 removal sliding slot sliding blocks；
Fig. 8 is the enlarged diagram of sliding rail in Fig. 4；
Fig. 9 is the schematic diagram of three different conditions after slider-crank mechanism removal sliding rail；
Figure 10 is the schematic diagram of two sliding slot of the utility model embodiment and commutation valve portion；
Figure 11 is the schematic diagram for the oil circuit being connected with oil cylinder in the utility model embodiment three；
Figure 12 is the schematic diagram for the oil circuit being connected with oil cylinder in the utility model embodiment four；
Figure 13 is the schematic diagram for the oil circuit being connected with oil cylinder in the utility model embodiment five.
In figure：1, workbench is forged and pressed；2, guide post；3, oil pressure machine walking beam；4, hydraulic press determines beam；5, oil cylinder；6, the first oil
Pump；7, piston rod；8, the first reversal valve；9, operating lever；10, convex block；11, slot；12, wrinkle piece is folded；13, sliding slot；14, sliding
Block；15, first connecting rod；16, second connecting rod；17, roller；18, sliding rail；19, fixed plate；20, guide pad；21, connecting rod；22、
Third connecting rod；23, motor；24, flywheel；25, the second oil pump；26, the second reversal valve；27, crude oil pipe；28, thin oil pipe；29,
One or two two electric change valve；30, oil return speedup oil pipe；31, the second 2/2-way solenoid directional control valve.
Specific implementation mode
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is further described.Implement below
Example is only used for clearly illustrating the technical solution of the utility model, and the protection model of the utility model cannot be limited with this
It encloses.
Embodiment one：
As shown in Figures 1 to 9, the utility model is oil press for forging, including forging and stamping workbench 1 and forging and stamping workbench 1
Four guide posts 2 being fixedly connected, are fixedly connected on 2 end of guide post at the oil pressure machine walking beam 3 being slidably matched with guide post 2
Hydraulic press determines beam 4, is fixed at the first oil pump 6 that hydraulic press determines oil cylinder 5 on beam 4 and drive cylinder 5 works, oil cylinder 5
Piston rod 7 is fixedly connected with oil pressure machine walking beam 3, and the input terminal of the first oil pump 6 is connected with fuel tank, and output end passes through oil pipe and oil cylinder 5
It is connected, the first reversal valve 8 is set on oil pipe, further includes the slider-crank mechanism for making 8 spool fast reciprocating of the first reversal valve move.
First reversal valve 8 is the first reversal valve of 3-position 4-way 8.The ex-situ operations portion of 8 its spool of the first reversal valve of 3-position 4-way is can be left
The convex block 10 moved right is integrally formed or is fixedly installed with spool, the slot 11 that setting is translated for convex block 10 on valve body, convex block
10 stretch out slot 11, and the folding wrinkle piece 12 of enclosed slot 11 is arranged in notch, and sealing ring is arranged with wrinkle piece 12 is folded in convex block 10.Crank
Slide block mechanism includes a sliding slot 13 being fixedly installed and the sliding block 14 being slidably arranged in sliding slot 13, is rotatably connected on sliding block 14
On first connecting rod 15, be rotatably connected on the second connecting rod 16 of 15 end of first connecting rod, second connecting rod 16 with first connecting rod 15
Junction its backwards to first connecting rod 15 surface pivots be arranged roller 17；Further include the fixed plate 19 equipped with sliding rail 18, sliding rail 18
It is adapted with roller 17, at the sustained height that fixed plate 19 is generally aligned in the same plane with sliding slot 13, sliding rail 18 is located in fixed plate 19
At center rotation setting rectangular tubular guide pad 20, second connecting rod 16 be inserted into guide pad 20 in, sliding block 14 by connector with
Convex block 10 is connected.The shape of sliding rail 18 is to be made of the semiellipse of the semicircle of upper semisection and lower semisection.Connector be connecting pole or
Connecting rod 21 is fixedly connected on convex block 10.The P mouth phases of the output end of first oil pump 6 and the first reversal valve of 3-position 4-way 8
Even, the A mouths of the first reversal valve of 3-position 4-way 8 are connected with the rodless cavity of oil cylinder 5, and the rod chamber of oil cylinder 5 passes through oil pipe and three four
The B mouths of logical first reversal valve 8 are connected, and the T mouths of the first reversal valve of 3-position 4-way 8 are connected with fuel tank.Fixed plate 19 is oriented to backwards
Motor 23 is set in the one side of block 20, and 23 axis of motor is connected with guide pad 20 across fixed plate 19, is fixedly installed on 23 axis of motor
Flywheel 24 for energy storage.
Embodiment two：
With being different only in that for embodiment one, as shown in Figure 10, the ex-situ operations of 8 its spool of the first reversal valve of 3-position 4-way
Portion is operating lever 9.Sliding block 14 is connected by connector with operating lever 9.Connector includes connecting rod 21, and one end, which is fixed, to be connected
It is connected on 14 surface of sliding block, the other end is rotatablely connected third connecting rod 22, and third connecting rod 22 is fixedly connected on operating lever 9.
Embodiment three：
It is with the difference of embodiment one, as shown in figure 11, oil piping system includes the second oil pump 25, first reversal valve
For three position four-way directional control valve, switch contact is set on a side wall of the first reversal valve, switch contact electrically connects with controller
It connects, controller is electrically connected with electromagnet, and electromagnet controls the spool movement of the second reversal valve 26, the second reversal valve 26 after being powered
For two four-way electromagnetic reversing valves, the second reversal valve 26 is arranged on the oil pipe that the second oil pump 25 is connected with oil cylinder.Second oil pump
25 output end is connected with the P of two four-way electromagnetic reversing valves mouths, the rodless cavity of the A mouth and oil cylinder of two four-way electromagnetic reversing valves
It is connected, the rod chamber of oil cylinder is connected by oil pipe with the B of two four-way electromagnetic reversing valves mouths, the T of two four-way electromagnetic reversing valves
Mouth is connected with fuel tank.
Example IV：
It is with the difference of embodiment three, as shown in figure 12, oil piping system includes the crude oil pipe being connected with cylinder rod chamber
27 and the thin oil pipe 28 that is connected with oil cylinder rodless cavity, first reversal valve be three position four-way directional control valve, crude oil pipe 27 and three
The B mouths of position and four-way reversing valve are connected, and the T mouths of three position four-way directional control valve are connected with fuel tank；Thin oil pipe 28 and three position four-way directional control valve
A mouths be connected, the P mouths of three position four-way directional control valve are connected with the output end of the first oil pump.
Embodiment five：
Be with the difference of embodiment three, as shown in figure 13, oil piping system include setting with 6 output end phase of the first oil pump
Even the first 2/2-way solenoid directional control valve 29 and an oil return speedup that cylinder rod chamber is connected to from oil cylinder rodless cavity on oil pipe
The second 2/2-way solenoid directional control valve 31 is arranged on oil return speedup oil pipe 30 in oil pipe 30；First reversal valve is 3-position 4-way
Switch contact is arranged in reversal valve in the two side walls of the first reversal valve, and switch contact is electrically connected with controller, controller point
Do not connect with the electromagnetism ferroelectricity of the electromagnet of the first 2/2-way solenoid directional control valve 29 and the second 2/2-way solenoid directional control valve 31
It connects, electromagnet controls the first 2/2-way solenoid directional control valve 29 after being powered or the spool of the second 2/2-way solenoid directional control valve 31 moves
It is dynamic.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without deviating from the technical principle of the utility model, several improvements and modifications can also be made, these change
The scope of protection of the utility model is also should be regarded as into retouching.
Claims (6)
1. oil press for forging, which is characterized in that at least three be fixedly connected including forging and stamping workbench, with forging and stamping workbench lead
Xiang Zhu, the oil pressure machine walking beam being slidably matched with guide post, be fixedly connected on be oriented to column end hydraulic press determine beam, be fixed at
Hydraulic press determines the oil cylinder on beam and the first oil pump of drive cylinder work, the piston rod of oil cylinder are fixedly connected with oil pressure machine walking beam, the
The input terminal of one oil pump is connected with fuel tank, and output end is connected by oil pipe with oil cylinder, and the first reversal valve is arranged on oil pipe, further includes
The oil piping system for making its pushing process of cylinder efficient stroke become faster.
2. oil press for forging as described in claim 1, which is characterized in that the oil piping system includes the second oil pump, described
First reversal valve is three position four-way directional control valve, and switch contact, switch contact and control are arranged on a side wall of the first reversal valve
Device processed is electrically connected, and controller is electrically connected with electromagnet, and electromagnet controls the second reversal valve spool after being powered moves, and second
Reversal valve is two four-way electromagnetic reversing valves, and the second reversal valve is arranged on the oil pipe that the second oil pump is connected with oil cylinder.
3. oil press for forging as claimed in claim 2, which is characterized in that the output end and 3-position 4-way of first oil pump
The P mouths of reversal valve are connected, and A mouths of three position four-way directional control valve is connected with the rodless cavity of oil cylinder, the rod chamber of oil cylinder by oil pipe and
The B mouths of three position four-way directional control valve are connected, and the T mouths of three position four-way directional control valve are connected with fuel tank.
4. oil press for forging as claimed in claim 3, which is characterized in that the output end of second oil pump and two four-ways
The P mouths of solenoid directional control valve are connected, and the A mouths of two four-way electromagnetic reversing valves are connected with the rodless cavity of oil cylinder, and the rod chamber of oil cylinder is logical
It crosses oil pipe with the B of two four-way electromagnetic reversing valves mouths to be connected, the T mouths of two four-way electromagnetic reversing valves are connected with fuel tank.
5. oil press for forging as described in claim 1, which is characterized in that the oil piping system includes and cylinder rod chamber phase
Crude oil pipe even and the thin oil pipe being connected with oil cylinder rodless cavity, first reversal valve are three position four-way directional control valve, crude oil pipe
It is connected with the B of three position four-way directional control valve mouths, the T mouths of three position four-way directional control valve are connected with fuel tank；Thin oil pipe commutates with 3-position 4-way
The A mouths of valve are connected, and the P mouths of three position four-way directional control valve are connected with the output end of the first oil pump.
6. oil press for forging as described in claim 1, which is characterized in that the oil piping system include setting with first oil
Pump output terminal be connected oil pipe on the first 2/2-way solenoid directional control valve and one be connected to cylinder rod chamber from oil cylinder rodless cavity
The second 2/2-way solenoid directional control valve is arranged on oil return speedup oil pipe in oil return speedup oil pipe；First reversal valve is three four
Switch contact is arranged in logical reversal valve in the two side walls of the first reversal valve, and switch contact is electrically connected with controller, controller
It is electrically connected respectively with the electromagnet of the electromagnet of the first 2/2-way solenoid directional control valve and the second 2/2-way solenoid directional control valve,
Electromagnet controls the spool movement of the first 2/2-way solenoid directional control valve or the second 2/2-way solenoid directional control valve after being powered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721638637.9U CN207668409U (en) | 2017-11-30 | 2017-11-30 | Oil press for forging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721638637.9U CN207668409U (en) | 2017-11-30 | 2017-11-30 | Oil press for forging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207668409U true CN207668409U (en) | 2018-07-31 |
Family
ID=62966475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721638637.9U Active CN207668409U (en) | 2017-11-30 | 2017-11-30 | Oil press for forging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207668409U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107913966A (en) * | 2017-11-30 | 2018-04-17 | 江阴振宏重型锻造有限公司 | Oil press for forging |
-
2017
- 2017-11-30 CN CN201721638637.9U patent/CN207668409U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107913966A (en) * | 2017-11-30 | 2018-04-17 | 江阴振宏重型锻造有限公司 | Oil press for forging |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 888, east section of Furong Avenue, Jiangyin City, Wuxi City, Jiangsu Province, 214400 Patentee after: Zhenhong heavy industry (Jiangsu) Co.,Ltd. Address before: No. 888, east section of Furong Avenue, Jiangyin City, Wuxi City, Jiangsu Province, 214400 Patentee before: JIANGYIN ZENKUNG FORGING Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |