CN215431013U - Quick idle stroke press - Google Patents
Quick idle stroke press Download PDFInfo
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- CN215431013U CN215431013U CN202121008693.0U CN202121008693U CN215431013U CN 215431013 U CN215431013 U CN 215431013U CN 202121008693 U CN202121008693 U CN 202121008693U CN 215431013 U CN215431013 U CN 215431013U
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- 230000003014 reinforcing effect Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 3
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- 238000004080 punching Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
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- 238000012423 maintenance Methods 0.000 description 1
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Abstract
The utility model discloses a rapid idle stroke press; the fast-forward device comprises a rack, a power motor, a cam shaft, a connecting rod and a flywheel, wherein the cam shaft is rotatably arranged on the rack, the flywheel is fixedly arranged on the rear side section of the cam shaft, the top of the connecting rod is sleeved on the cam part of the cam shaft, the fast-forward device also comprises a fast-forward motor and a fast-forward upright post, the fast-forward upright post is arranged on the rack in a sliding manner, and the bottom of the fast-forward upright post is fixedly connected with a movable die mounting seat; the driving component is fixed in the fast-forward upright post and is in power connection with the fast-forward motor; one end of the limiting piece is connected with the pressure output end of the press machine, the other end of the limiting piece is in threaded connection with the driving assembly, and the connecting rod is hinged with the limiting piece; the driving part is driven to rotate by the motor, and the driving part reciprocates along the limiting part when rotating, so that acceleration is provided for the movement of the movable die in the working process of the press machine, and the movable die can move through the idle stroke more quickly.
Description
Technical Field
The utility model relates to the field of presses, in particular to a quick idle stroke press.
Background
The present stamping rapid prototyping is widely used in various fields, and the use of a press is more common. The traditional mechanical press machine adopts a crank block type mechanism, an asynchronous motor drives a flywheel through a triangle belt during working, the crank block mechanism is driven through a gear pair and a clutch, a slide block and a male die are made to go down linearly, and punching is completed. The mechanical structure is inseparable in the punching stroke and the idle stroke, so that large energy waste is caused in the idle stroke, and the stroke is difficult to adjust due to the limitation of the crank-slider mechanism.
Chinese patent CN105082592A, which describes a servo press with a main motor translational symmetric toggle rod for fast idle stroke and slow pressurization, wherein a servo motor drives a transmission shaft of an idle stroke device to rotate through a small belt pulley and a large belt pulley, two sides of the transmission shaft are provided with worms, the worms drive a worm wheel to rotate and drive a first nut thereon to rotate, so that a transmission screw rod moves downwards, wherein a lower end of the transmission screw rod is connected with an upper end of an upper toggle rod, a lower end of the upper toggle rod is connected with an upper end of a support seat, a lower end of the support seat is connected with an upper end of a connecting rod through a lower toggle rod, a lower end of the connecting rod is connected with an upper end of a main slider, the left and right sides of the main slider are connected with guide blocks, the guide blocks slide on guide rails, the guide rails are fixed on side walls of a machine body, the middle of the support seat is hinged with a left end of a main piston of a main transmission structure, the middle of the machine body is connected with a balance cylinder, one side of the balance cylinder is provided with a notch for introducing compressed air, a balance piston of the balance cylinder has an upward thrust under the pressure of the compressed air below, the lower end of the balance piston extends out of the middle of the lower cover and is fixed with the shell of the main transmission structure. The rigidity of the press machine shown by the scheme is insufficient, and the time of stamping a nominal pressure stroke is long.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems, an object of the present invention is to provide a press machine capable of fast forward idle stroke.
In order to achieve the purpose, the utility model adopts the following technical scheme: the cam shaft is rotatably arranged on a rack, the flywheel is fixedly arranged on the rear side section of the cam shaft, the top of the connecting rod is sleeved on the cam part of the cam shaft, the fast-forward motor and the fast-forward upright post are arranged on the rack, the fast-forward upright post is arranged on the rack in a sliding mode, and the bottom of the fast-forward upright post is fixedly connected with a movable die mounting seat; the driving component is fixed in the fast-forward upright post and is in power connection with the fast-forward motor; one end of the limiting part is connected with the pressure output end of the press machine, the other end of the limiting part is in threaded connection with the driving assembly, and the connecting rod is hinged to the limiting part.
Preferably, the driving assembly comprises a driving piece rotatably mounted in the fast-forward stand column, the driving piece is an internal thread shaft sleeve, the internal thread shaft sleeve is in power connection with the fast-forward motor, the limiting piece is provided with a driving end portion and a connecting end portion, the driving end portion is provided with threads, and the driving end portion is in threaded fit with the internal thread shaft sleeve.
Preferably, the device also comprises a fast-forward motor, and the fast-forward motor and the internally threaded shaft sleeve are in power connection through a transmission belt.
Preferably, the fast-forward motor is fixed to the outside of the fast-forward column.
Preferably, the fast-forward upright post is provided with an avoiding hole communicated with the inside, and the transmission belt passes through the avoiding hole.
Preferably, the driving assembly further comprises a sliding part, the sliding part is fixed in the fast-forward upright post, the internal thread shaft sleeve is rotatably connected to the bottom of the sliding part, and the limiting part is in sliding fit with the sliding part.
Preferably, the limiting member is provided with a sliding section, the sliding section is located between the driving end portion and the connecting end portion, and the diameter of the sliding section is larger than that of the driving end portion.
Preferably, the bottom of the connecting rod is provided with a notch, a hinge shaft is rotatably mounted in the notch, the connecting end part is positioned between the notches, the hinge shaft penetrates through the connecting end part of the limiting part, and the sliding section is in sliding connection with the fast-forward upright post.
Preferably, a second fixing plate is fixedly connected to the inside of the fast forward upright, the driving assembly is fixed to the top of the second fixing plate, and a force column is fixedly arranged between the second fixing plate and the movable die mounting seat.
Preferably, the flywheel is a hollow member, and the weight of the flywheel is increased by adding a filler to the inside of the flywheel.
In the scheme of the utility model, the driving part is driven to rotate by the motor, and the driving part reciprocates along the limiting part through threads when rotating, so that acceleration is provided for the movement of the movable die in the working process of the press machine, and the movable die can move through the idle stroke more quickly; meanwhile, under different working conditions, the working strokes of different heights required by workpieces of different specifications are met by controlling the sliding distance between the driving piece and the fast-forward upright post; the power output end of the press machine is provided with a fast forwarding device capable of quickly completing the idle stroke of the press machine, the fast forwarding of the idle stroke is realized on the basis of not greatly changing the original press machine, the working stroke of the press machine is powered by the original press machine, and therefore the improvement cost of the press machine is lower; in the scheme, the fast-forward upright post which can slide along the stroke direction of the press is driven by a thread structure, and the moving distance of the fast-forward upright post is accurately controlled by controlling the fast-forward speed and the fast-forward direction of the fast-forward device by a motor; the motor for fast forward is fixed at the outer side of the fast forward upright post, so that the fast forward motor and the fast forward upright post can keep synchronous, the output stability of the fast forward motor is ensured, on one hand, the internal space of the fast forward upright post can be saved, the fast forward upright post and components in the fast forward upright post are optimized and controlled, and a complex transmission structure can be avoided; the sliding connection between the sliding section of the limiting part and the sliding part of the driving assembly can reduce the shaking of the limiting part during the movement, so that the fast-forward device is more stable, and the service life of the limiting part is prolonged; the flywheel is a hollow part, and the weight of the flywheel is increased by adding fillers into the flywheel, so that the cost of the flywheel can be reduced under the condition of ensuring the punching force, and the fillers with different densities and different qualities can be filled in the same flywheel in different application scenes, so that the flywheel with the required weight is obtained; in the disassembly of the flywheel, the weight of the flywheel can be reduced by directly releasing the filler in the flywheel, and the aim of convenient disassembly and replacement is fulfilled.
Drawings
FIG. 1 is a schematic view of a press;
FIG. 2 is a schematic view of the structure of the fast forwarding apparatus;
FIG. 3 is a schematic structural diagram of a driving assembly;
FIG. 4 is a schematic structural diagram of a limiting member;
FIG. 5 is a schematic view of a portion of the power plant;
fig. 6 is a schematic structural view of the connecting rod.
Reference numerals: 1. a frame; 11. manufacturing a working area; 12. a fixed die mounting seat; 13. a slipping channel; 21. a flywheel; 22. a camshaft; 23. a connecting rod; 231. a connecting ring; 232. a hinge plate; 233. a reinforcing plate; 234. hinging a shaft; 24. a power motor; 25. a flywheel brake; 3. fast-forward upright columns; 31. a movable die mounting seat; 32. a first fixing plate; 33. a second fixing plate; 34. a force column; 4. A fast forward motor; 41. a motor mounting seat; 5. a drive assembly; 51. a drive member; 52. a slider; 521. a fixed part; 522. a limiting boss; 53. a base; 6. a limiting member; 61. a drive end portion; 62. a connecting end portion; 63. a slipping section; 64. avoiding the hole.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the reference position of each component in this embodiment, when the press is normally installed and used, the positions of the front of the press, such as the movable die installation seat and the fixed die installation seat 12, are the front end and the front part, and the positions of the rear of the press are the rear end and the rear part.
A press machine as shown in fig. 1-6, which includes a frame 1, a fast forwarding device for fast forwarding idle stroke is installed on the frame 1, a power device 2 is also installed on the frame 1, the power device 2 includes a flywheel 21, a cam shaft 22, a connecting rod 23 and a power motor 24, the power motor 24 is fixedly installed on the frame 1, the cam shaft 22 is rotatably installed on the frame 1, the flywheel 21 is rotatably installed on the rear section of the cam shaft 22, a rear flywheel brake 25 is installed between the flywheel 21 and the cam shaft 22, the flywheel 21 is in power connection with the power motor 24, and the top of the connecting rod 23 is sleeved on the cam portion of the cam shaft 22; the front end of frame 1 caves in backward has and makes the district 11, make district 11 and cave in upward and form the passageway 13 that slides, the bottom in the district 11 of doing is installed cover half mount pad 12 or workstation.
2-4, the fast-forward device comprises a fast-forward upright post 3 which is hollow up and down, the fast-forward upright post 3 is arranged in a press in a sliding way, the fast-forward upright post 3 can reciprocate along the stroke direction, and the bottom of the fast-forward upright post 3 is fixedly connected with a movable die mounting seat 31; the fast-forward motor 4 is used for providing kinetic energy for the movement of the fast-forward upright post 3; the fast-forward component is used for connecting the press and limiting the movement of the fast-forward upright post 3; the fast forward assembly comprises a driving assembly 5 and a limiting piece 6, the driving assembly 5 is fixed in the fast forward upright post 3, and the driving assembly 5 is in power connection with the fast forward motor 4; one end of the limiting part 6 is connected with the pressure output end of the press machine, and the limiting part 6 is in threaded connection with the driving assembly 5.
In this embodiment, the fast forwarding device is located in the sliding channel 13, the fast forwarding column 3 is slidably connected with the sliding channel 13, a sliding rail and a guide rail are slidably fitted between the fast forwarding column 3 and the sliding channel 13, the cam shaft 22 penetrates through the sliding channel 13, the connecting rod 23 is located in the sliding channel 13, and the bottom of the connecting rod 23 is hinged to the limiting piece 6 in the fast forwarding device; in this embodiment, the bottom of the connecting rod 23 is the pressure output end of the press. According to the arrangement, when the press machine works, a workpiece to be processed is placed and mounted on the fixed die mounting seat 12, the movable die is mounted on the movable die mounting seat 31, the power motor 24 drives the flywheel 21 to rotate, the flywheel 21 drives the camshaft 22 to rotate, the camshaft 22 drives the connecting rod 23 to move downwards from the highest point, the connecting rod 23 drives the fast-forward device to move downwards, and the fast-forward device 23 drives the movable die to move downwards so as to complete stamping; in the action process, the fast-forward device finishes the action of fast-forwarding the idle stroke.
In this embodiment, the driving assembly 5 includes a driving member 51 rotatably connected and disposed in the fast-forward column 3, the driving member 51 is in threaded engagement with the limiting member 6, and the fast-forward motor 4 is in power engagement with the driving member 51; the fast forward motor 4 is a controllable servo motor.
It is further preferred that the fast forward motor 4 is fixedly installed at the outside of the fast forward column 3, and the fast forward motor 3 moves along with the fast forward column 3. In this embodiment, the fast forward column 3 is fixedly connected with a motor mounting base 41 at the rear side, and the fast forward motor 4 is fixedly mounted on the motor mounting base. By the arrangement, the fast-forward motor 4 and the fast-forward upright post 3 can be kept synchronous, and the output stability of the fast-forward motor 4 is ensured; the space inside the fast forward column 3 can be saved, and the fast forward column 3 and the components inside the fast forward column can be optimized and controlled.
Further preferably, power connection is realized through the drive belt between the power take off end of fast-forward motor 4 and driving piece 51, set up the inside hole 64 of dodging of intercommunication on the fast-forward stand 3, the hole 64 of dodging is used for making the drive belt that drives between fast-forward motor 4 and the driving piece 51 to pass through.
In the scheme, the driving part 51 is an internal thread shaft sleeve, the limiting part 6 is arranged on a driving end part 61 and a connecting end part 62, the driving end part 61 is provided with threads and is in threaded connection with the internal thread shaft sleeve, and the connecting end part 62 is used for connecting the output end of the press; according to the arrangement, when the press machine needs to rapidly move to the idle stroke, the express piece motor 4 is started to drive the driving piece 51, namely, the internal thread shaft sleeve to rotate, the driving piece 51 moves downwards along the driving end part 61 of the limiting piece 6 when rotating, the driving piece 51 drives the fast-forward upright post 3 to move downwards, the driven upright post 3 drives the movable die mounting base 31 to move downwards, and thus, the corresponding fast-forward action is completed; above-mentioned scheme can be accurate control idle stroke's length through the screw thread, can realize through nimble control fast forward motor 3, to different parts, different processing requirements such as technology that do not use.
In this embodiment, the driving assembly 5 further includes a sliding member 52 fixed inside the fast-forward column 3, and the limiting member 6 is slidably engaged with the sliding member 52. So set up, rock when reducing locating part 6 and moving, make fast forward device's stability strengthened, still can increase the life of locating part 6.
Further preferably, the sliding member 52 is a sliding sleeve, the inner diameter of the sliding sleeve is larger than the outer diameter of the driving member 51, i.e. the inner threaded sleeve, the limiting member 6 is further provided with a sliding section 63, the sliding section 63 is located between the driving end portion 61 and the connecting end portion 62, the diameter of the sliding section 63 is larger than that of the driving end portion 61, and the sliding section 63 of the limiting member 6 is located inside the sliding member 52 and is in sliding fit.
Further preferably, the bottom of the sliding sleeve protrudes inwards to form an annular limiting boss 522, and the driving element 51 is rotatably connected with the limiting boss 522; so set up, when driving piece 51 resets and moves upwards, when the bottom of the slippage section 63 of locating part 6 contradicts with spacing boss 522, and then reaches fast-forward stand 3's stroke upper limit, fast-forward motor 4 stops immediately, so both can set up the upper limit for driving piece 51, provide the protection for fast-forward device and press simultaneously.
Preferably, a hollow first fixing plate 32 is fixedly arranged in the fast-forward upright 3, a fixing part 521 is protruded outside the sliding sleeve of the sliding part 52, the sliding part 52 is compressed downwards through the hollow position of the first fixing plate 32, and the fixing part 521 of the sliding part 52 is positioned at the upper side of the first fixing plate 32 and is fixedly connected through a fastener; so set up, conveniently dismantle and change the interior subassembly of stand 3 fast forward, improve the efficiency of work and maintenance.
Preferably, a second fixing plate 33 is fixedly connected to the inside of the fast-forward upright 3, the second fixing plate 33 is located at the lower side of the driving assembly 5, a base 53 is rotatably installed at the bottom of a driving part 51 of the driving assembly 5, the base 53 is fixedly installed at the top of the second fixing plate 33, and a force column 34 is fixedly connected between the second fixing plate 33 and the movable die installation seat 31; by the arrangement, the situation that the driving piece 51 directly pushes the movable die mounting seat 31 when the press works, and the device and the die are damaged is avoided.
In this embodiment, the connecting rod 23 includes a connecting ring 231, the connecting ring 231 is rotatably mounted on the cam of the cam shaft 22, two hinge plates 232 extending downward are symmetrically fixed on the outer side of the connecting ring 231, a reinforcing plate 233 is fixed between the two hinge plates 232, the reinforcing plate 233 is located at the end of the hinge plate 232, the top of the reinforcing plate 233 is fixed on the outer side of the connecting ring 231, so that recesses opening downward are formed at the bottom sections of the two hinge plates 232 and the bottom of the reinforcing plate 233, the connecting end portion 62 of the position-limiting member 6 is located between the recesses, a hinge shaft 234 penetrates through the connecting end portion 62 of the position-limiting member 6, and both ends of the hinge shaft 234 are respectively rotatably mounted at the bottoms of the two hinge plates 232, so that the position-limiting member 6 and the connecting rod 23 are hinged.
In this embodiment, the flywheel 21 is a hollow member, the inside of the flywheel 21 is reinforced by a plurality of support rods, and the weight of the flywheel 21 is increased by adding fillers into the inside; by the arrangement, on one hand, the cost of the flywheel 21 can be reduced, and on the other hand, in different application scenes, fillers with different densities and different masses can be filled in the same flywheel 21, so that the flywheel with the required weight can be obtained; in the process of disassembling the flywheel 21, the weight of the flywheel can be reduced by directly releasing the filler in the flywheel 21, and the aim of convenient disassembly and replacement is fulfilled.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.
Claims (10)
1. The utility model provides a quick idle stroke press, includes frame (1), motor power (24), camshaft (22), connecting rod (23) and flywheel (21), camshaft (22) rotate and install in frame (1), flywheel (21) fixed mounting is on the rear portion section of camshaft (22), connecting rod (23) top cover is established the cam part of camshaft (22), its characterized in that: the fast-forward device is characterized by further comprising a fast-forward upright post (3) and a fast-forward motor (4) which are installed on the rack, wherein the fast-forward upright post (3) is arranged on the rack (1) in a sliding mode, and the bottom of the fast-forward upright post (3) is fixedly connected with a movable die installation seat (31); the fast-forward device is characterized by further comprising a driving assembly (5) and a limiting piece (6), wherein the driving assembly (5) is fixed in the fast-forward upright post (3), and the driving assembly (5) is in power connection with the fast-forward motor (4); one end of the limiting part (6) is connected with the pressure output end of the press machine, the other end of the limiting part (6) is in threaded connection with the driving assembly (5), and the connecting rod (23) is hinged to the limiting part (6).
2. A rapid lost motion press as claimed in claim 1, wherein: drive assembly (5) are including rotatable driving piece (51) of installing in fast-forwarding stand (3), driving piece (51) be the internal thread axle sleeve, the internal thread axle sleeve with fast-forward motor (4) power connection, be equipped with drive tip (61) and connection end portion (62) on locating part (6), be equipped with the screw thread on drive tip (61), drive tip (61) and internal thread axle sleeve screw-thread fit.
3. A rapid lost motion press as claimed in claim 2, wherein: the fast forward motor (4) and the internal thread shaft sleeve are in power connection through a transmission belt.
4. A rapid lost motion press according to claim 3, wherein: the fast-forward motor (4) is fixed on the outer side of the fast-forward upright post (3).
5. A rapid lost motion press according to claim 4, wherein: the fast-forward upright post (3) is provided with an avoiding hole (64) communicated with the inside, and the transmission belt passes through the avoiding hole (64).
6. A rapid lost motion press as claimed in claim 2, wherein: the driving assembly (5) further comprises a sliding part (52), the sliding part (52) is fixed in the fast-forward upright post (3), the internal thread shaft sleeve is rotatably connected to the bottom of the sliding part (52), and the limiting part (6) is in sliding fit with the sliding part (52).
7. A rapid lost motion press as claimed in claim 2, wherein: the limiting piece (6) is provided with a sliding section (63), the sliding section (63) is located between the driving end portion (61) and the connecting end portion (62), the diameter of the sliding section (63) is larger than that of the driving end portion (61), and the sliding section (63) is connected with the fast-forward stand column (3) in a sliding mode.
8. A rapid lost motion press according to claim 7, wherein: the connecting rod (23) is provided with a notch at the bottom, a hinge shaft (234) is rotatably arranged in the notch, the connecting end part (62) is positioned between the notches, and the hinge shaft (234) penetrates through the connecting end part (62) of the limiting part (6).
9. A rapid lost motion press as claimed in claim 1, wherein: fixedly connected with second fixed plate (33) in fast-forward stand (3), drive assembly (5) are fixed on the top of second fixed plate (33), and power post (34) have set firmly between second fixed plate (33) and movable mould mount pad (31).
10. A rapid lost motion press as claimed in claim 1, wherein: the flywheel (21) is a hollow part, and the flywheel (21) is filled with fillers.
Priority Applications (1)
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CN202121008693.0U CN215431013U (en) | 2021-05-12 | 2021-05-12 | Quick idle stroke press |
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CN202121008693.0U CN215431013U (en) | 2021-05-12 | 2021-05-12 | Quick idle stroke press |
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CN215431013U true CN215431013U (en) | 2022-01-07 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN117087226A (en) * | 2023-10-18 | 2023-11-21 | 山东圣德智能装备有限公司 | Press machine |
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2021
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN117087226A (en) * | 2023-10-18 | 2023-11-21 | 山东圣德智能装备有限公司 | Press machine |
CN117087226B (en) * | 2023-10-18 | 2023-12-15 | 山东圣德智能装备有限公司 | Press machine |
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Effective date of registration: 20231101 Address after: 116000 yinggeshi village, dongjiagou street, Dalian Economic and Technological Development Zone, Liaoning Province Patentee after: Dalian same honeycomb paper products Co.,Ltd. Address before: 313219 LEIDIAN Town Industrial Park, Deqing County, Huzhou City, Zhejiang Province Patentee before: ZHEJIANG BOLEI HEAVY MACHINE TOOL MANUFACTURING Co.,Ltd. |
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