CN210847956U - Noise reduction type stamping die - Google Patents
Noise reduction type stamping die Download PDFInfo
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- CN210847956U CN210847956U CN201921482696.0U CN201921482696U CN210847956U CN 210847956 U CN210847956 U CN 210847956U CN 201921482696 U CN201921482696 U CN 201921482696U CN 210847956 U CN210847956 U CN 210847956U
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Abstract
The utility model discloses a type of making an uproar stamping die falls, comprising a base plate, the lower surface of bottom plate and the top fixed connection of four supporting legs, the lower surface of bottom plate and the last fixed surface of U-shaped board are connected, the lower surface of U-shaped inboard wall and the bottom overlap joint of connecting rod, the right flank of connecting rod is provided with the handle, two through-holes have been seted up to the right flank of connecting rod, and are provided with latch device in the through-hole of top, the latch device joint is at the left surface of U-shaped board. This type of making an uproar stamping die falls through the cooperation between connecting rod, through-hole, latch device, handle, trapezoidal piece, pulley, slider, first connecting plate, second spring, pivot, bearing, resilient means, baffle, kelly and the draw-in groove, and then makes the process of dismouting bed die need not use specific instrument, and then has reduced the time that people overhauld or changed the bed die, has guaranteed people's work efficiency.
Description
Technical Field
The utility model relates to the technical field of mold, specifically be a type of making an uproar stamping die falls.
Background
The stamping die is a special process equipment for processing materials (metal or nonmetal) into parts (or semi-finished products) in cold stamping, and is called cold stamping die (commonly called cold stamping die). Stamping is a press working method in which a die mounted on a press is used to apply pressure to a material at room temperature to cause separation or plastic deformation of the material, thereby obtaining a desired part.
The type of making an uproar stamping die makes stamping die's a, and the type of making an uproar stamping die that falls now uses the screw to fix the mould when fixed, needs people to use specific instrument to pull down when dismantling, when needs are changed or are maintained the mould, and the process of dismantling the mould can cost a large amount of time to reduce people's work efficiency.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
The utility model provides a to prior art not enough, the utility model provides a type of making an uproar stamping die falls has solved and has fallen type of making an uproar stamping die when fixed, and the majority uses the screw to fix the mould, needs people to use specific instrument to pull down when dismantling, when needs are changed or are maintained the mould, and the process of dismantling the mould can cost a large amount of time to reduce people's work efficiency's problem.
(II) technical scheme
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a type of making an uproar stamping die falls, includes the bottom plate, the lower surface of bottom plate and the top fixed connection of four supporting legs, the lower surface of bottom plate and the last fixed surface of U-shaped board are connected, the lower surface of U-shaped inboard wall and the bottom overlap joint of connecting rod, the right flank of connecting rod is provided with the handle, two through-holes have been seted up to the right flank of connecting rod, and are provided with latch device in the through-hole of top, the latch device joint is at the left surface of U-shaped board, the lower fixed surface of first recess and trapezoidal piece is passed on the top of connecting rod, the lower surface at the bottom plate is seted up to first recess, the both sides face of trapezoidal piece all overlaps and has the pulley, and the right-hand member of right side pulley and slider's left end fixed connection, slider's upper surface passes.
The upper surface at the inner wall of first recess is seted up to the second recess, slider's right-hand member and the left surface overlap joint of first connecting plate, the right flank of first connecting plate passes through the right flank fixed connection of second spring with third recess inner wall, the positive joint of first connecting plate has the pivot, the bearing has all been cup jointed at the both ends of pivot, and two bearings joint respectively at the front and the back of third recess inner wall, the right flank at second recess inner wall is seted up to the third recess, the left surface overlap joint of third recess and second connecting plate is passed to the upper surface of first connecting plate.
The right side face of the second connecting plate is connected with an elastic device in a clamping mode, the right end of the elastic device is fixedly connected with the right side face of the inner wall of a fourth groove, the upper surface of the inner wall of a third groove is formed in the fourth groove, the left end of the elastic device is fixedly connected with the right side face of the baffle, the left side face of the second connecting plate is fixedly connected with the right end of the clamping rod, a fifth groove is formed in the upper surface of the bottom plate, a lower die is arranged in the fifth groove, clamping grooves are formed in the positions, corresponding to the clamping rod, of the two side faces of the lower die, an upper die is arranged on the upper surface of the lower die, the upper surface of the upper die is fixedly connected with the lower surface of the top plate through an electric push rod, and the lower surface of the.
Preferably, the clamping device includes first slide bar, first slide bar is located the through-hole, the left end of first slide bar and the right flank fixed connection of limiting plate, first sliding sleeve has been cup jointed on the surface of first slide bar, first sliding sleeve joint is at the left surface of U-shaped plate, first spring has been cup jointed on the surface of first slide bar, the both ends of first spring respectively with the opposite face fixed connection of limiting plate and first sliding sleeve.
Preferably, the sliding device comprises a second sliding rod, a second sliding sleeve is sleeved on the surface of the second sliding rod, and the upper surface of the second sliding sleeve is fixedly connected with the lower surface of the fixed block.
Preferably, the elastic device comprises a third sliding rod, two ends of the third sliding rod are respectively fixedly connected with the right side surface of the fourth groove inner wall and the right side surface of the baffle, a third sliding sleeve is sleeved on the surface of the third sliding rod, the third sliding sleeve is connected to the right side surface of the second connecting plate in a clamping manner, a third spring is sleeved on the surface of the third sliding rod, and two ends of the third spring are respectively fixedly connected with the right side surface of the third groove inner wall and the right side surface of the third sliding sleeve.
Preferably, the left side surface of the supporting plate is fixedly connected with the right side surface of the power supply, and the left side surface of the power supply is fixedly connected with the right side surface of the switch.
Preferably, the output end of the power supply is electrically connected with the input end of the switch, and the output end of the switch is electrically connected with the input end of the electric push rod.
(III) advantageous effects
The utility model provides a type of making an uproar stamping die falls possesses following beneficial effect:
(1) this type of making an uproar stamping die falls, through the connecting rod, the through-hole, latch device, the handle, the trapezoidal piece, the pulley, slider, first connecting plate, the second spring, the apparatus further comprises a rotating shaft, a bearing, resilient means, a baffle, cooperation between kelly and the draw-in groove, when people need install the bed die, stimulate the limiting plate left, make first slide bar and through-hole separation, then make connecting rod upward movement through promoting the handle, then trapezoidal piece top movable pulley keeps away from first recess motion, thereby second slide bar top movable first connecting plate rotates, first connecting plate top movable second connecting plate motion, then the kelly card advances the draw-in groove, and then the process that makes the dismouting bed die need not use specific instrument, and then the time that people overhauld or changed the bed die has been reduced, people's work efficiency has been guaranteed.
(2) This type of making an uproar stamping die falls through setting up first slide bar, and the shape of first slide bar is the rectangle, when making first slide bar be connected with the through-hole, the connecting rod can not rotate, makes the trapezoidal piece more stable with being connected of pulley, therefore the second slide bar top moves first connecting plate pivoted process more stable.
(3) This type of making an uproar stamping die falls through setting up the fixed block, makes the fixed more stable of second sliding sleeve, makes the side-to-side motion of second slide bar more stable, and then makes the motion of second connecting plate and kelly more stable to the process that the draw-in groove was advanced to the kelly card is more stable, just the utility model discloses compact structure, reasonable in design, the practicality is strong.
Drawings
Fig. 1 is a schematic front view of a cross-sectional structure of the present invention;
FIG. 2 is a front view of the present invention;
fig. 3 is a schematic structural diagram of the right side view of the present invention.
In the figure: 1, 2 support legs, 3U-shaped plates, 4 connecting rods, 5 through holes, 6 clamping devices, 61 a first sliding rod, 62 a first sliding sleeve, 63 a first spring, 64 a limiting plate, 7 handles, 8 a first groove, 9 a trapezoidal block, 10 pulleys, 11 sliding devices, 111 a second sliding rod, 112 a second sliding sleeve, 12 a fixed block, 13 a second groove, 14 a first connecting plate, 15 a second spring, 16 a third groove, 17 a rotating shaft, 18 bearings, 19 a fourth groove, 20 a second connecting plate, 21 an elastic device, 211 a third sliding rod, 212 a third sliding sleeve, 213 a third spring, 22 a baffle, 23 clamping rods, 24 clamping grooves, 25 lower dies, 26 a fifth groove, 27 upper dies, 28 electric push rods, 29 top plates, 30 support plates, 31 power supplies and 32 switches.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1-3, the utility model provides a technical solution: a noise reduction type stamping die comprises a bottom plate 1, wherein the lower surface of the bottom plate 1 is fixedly connected with the top ends of four supporting legs 2, the lower surface of the bottom plate 1 is fixedly connected with the upper surface of a U-shaped plate 3, the fixing of a connecting rod 4 is more stable by arranging the U-shaped plate 3, further, the up-and-down movement of a trapezoidal block 9 is more stable, the lower surface of the inner wall of the U-shaped plate 3 is lapped with the bottom end of the connecting rod 4, the right side surface of the connecting rod 4 is provided with a handle 7, the up-and-down movement of the connecting rod 4 is more conveniently controlled by people by arranging the handle 7, the right side surface of the connecting rod 4 is provided with two through holes 5, a clamping device 6 is arranged in each through hole 5 above, the clamping device 6 comprises a first sliding rod 61, the first sliding rod 61 is positioned in each through hole 5, the left end of, the first sliding sleeve 62 is clamped on the left side surface of the U-shaped plate 3, the surface of the first sliding rod 61 is sleeved with a first spring 63, two ends of the first spring 63 are respectively fixedly connected with the opposite surfaces of the limiting plate 64 and the first sliding sleeve 62, by arranging the first sliding rod 61, and the shape of the first sliding rod 61 is rectangular, when the first sliding rod 61 is connected with the through hole 5, the connecting rod 4 cannot rotate, so that the connection between the trapezoidal block 9 and the pulley 10 is more stable, the rotating process of the first connecting plate 14 pushed by the second sliding rod 111 is more stable, the clamping device 6 is clamped on the left side surface of the U-shaped plate 3, the top end of the connecting rod 4 penetrates through the first groove 8 to be fixedly connected with the lower surface of the trapezoidal block 9, the first groove 8 is arranged on the lower surface of the bottom plate 1, the pulleys 10 are respectively overlapped on two side surfaces of the trapezoidal block 9, and the pulley 10 is arranged to more conveniently push the trapezoidal block 9 to move, thereby more conveniently controlling the rotation of the first connecting plate 14, and the right end of the right side pulley 10 is fixedly connected with the left end of the sliding device 11, the sliding device 11 comprises a second sliding rod 111, a second sliding sleeve 112 is sleeved on the surface of the second sliding rod 111, the upper surface of the second sliding sleeve 112 is fixedly connected with the lower surface of the fixed block 12, the upper surface of the sliding device 11 is fixedly connected with the upper surface of the inner wall of the second groove 13 through the fixed block 12, through the arrangement of the fixed block 12, the fixation of the second sliding sleeve 112 is more stable, and further the movement of the second sliding rod 111 is more stable, so that the rotation of the first connecting plate 14 is more stable, and further the movement of the second connecting plate 20 is more stable, and further the process of clamping the clamping rod 23 into the clamping groove 24 is more stable.
The second groove 13 is arranged on the upper surface of the inner wall of the first groove 8, the right end of the sliding device 11 is lapped with the left side surface of the first connecting plate 14, the right side surface of the first connecting plate 14 is fixedly connected with the right side surface of the inner wall of the third groove 16 through the second spring 15, through the arrangement of the second spring 15, when the pulley 10 is separated from the trapezoidal block 9, the second spring 15 can drive the first connecting plate 14 to rotate through self elasticity, the process of dismounting the mould 25 by people is quicker, the front surface of the first connecting plate 14 is clamped with the rotating shaft 17, the two ends of the rotating shaft 17 are respectively sleeved with the bearings 18, through the arrangement of the rotating shaft 17 and the bearings 18, the first connecting plate 14 can better rotate, the process of pushing the first connecting plate 14 against the second connecting plate 20 is more flexible, the two bearings 18 are respectively clamped on the front surface and the back surface of the inner wall of the third groove 16, the third groove 16 is arranged on the right side surface of the inner wall of, the upper surface of the first connecting plate 14 passes through the third groove 16 to overlap with the left side surface of the second connecting plate 20.
The right side of the second connecting plate 20 is connected with an elastic device 21 in a clamping manner, the elastic device 21 is connected with the clamping rod 23 more tightly by arranging the second connecting plate 20, and further, people can control the movement of the clamping rod 23 more conveniently, the elastic device 21 comprises a third sliding rod 211, two ends of the third sliding rod 211 are respectively fixedly connected with the right side of the inner wall of the fourth groove 19 and the right side of the baffle 22, the surface of the third sliding rod 211 is sleeved with a third sliding sleeve 212, the third sliding sleeve 212 is connected with the right side of the second connecting plate 20 in a clamping manner, the surface of the third sliding rod 211 is sleeved with a third spring 213, two ends of the third spring 213 are respectively fixedly connected with the right side of the inner wall of the third groove 16 and the right side of the third sliding sleeve 212, and by arranging the third spring 213, when the first connecting plate 14 is separated from the second connecting plate 20, the third spring 213 can pull the third sliding rod 211 and the clamping rod 23 to move by, thereby the process of detaching the lower die 25 is faster, the right end of the elastic device 21 is fixedly connected with the right side surface of the inner wall of the fourth groove 19, the fourth groove 19 is arranged on the upper surface of the inner wall of the third groove 16, the left end of the elastic device 21 is fixedly connected with the right side surface of the baffle 22, the left side surface of the second connecting plate 20 is fixedly connected with the right end of the clamping rod 23, the clamping rod 23 is arranged, the clamping rod 23 is rectangular, the clamping rod 23 is more tightly connected with the clamping groove 24, the lower die 25 is more stably fixed, the upper surface of the bottom plate 1 is provided with a fifth groove 26, the lower die 25 is arranged in the fifth groove 26, the clamping grooves 24 are arranged on the two side surfaces of the lower die 25 corresponding to the clamping rod 23, the upper die 27 is arranged on the upper surface of the lower die 25, the upper surface of the upper die 27 is fixedly connected with the lower surface of the top plate 29 through the electric push rod 28, the lower surface of the top plate 29 is fixedly, the left side of backup pad 30 and the right flank fixed connection of power 31, the left side of power 31 and the right flank fixed connection of switch 32, the output of power 31 is connected with switch 32's input electricity, switch 32's output is connected with electric putter 28's input electricity, through setting up switch 32, and switch 32's model is LW5D-16, make things convenient for people's operating control to electric putter 28's operating condition more, through setting up power 31, can be better supply power to electric putter 28.
When the lower die 25 needs to be installed, when people need to install the lower die 25, firstly, the limiting plate 64 is pulled to enable the first sliding rod 61 to move leftwards, the first spring 63 is shortened, after the first sliding rod 61 is separated from the through hole 5, people push the connecting rod 4 upwards, the connecting rod 4 moves upwards to push the trapezoidal block 9 to move upwards, the trapezoidal block 9 pushes the pulley 10 to move away from the first groove 8, then the second sliding rod 111 pushes the first connecting plate 14 to rotate, meanwhile, the second spring 15 is shortened, the first connecting plate 14 pushes the second connecting plate 20 to move close to the clamping groove 24, meanwhile, the third spring 213 extends, then the clamping rod 23 is clamped into the clamping groove 24 to move, when the clamping rod 23 moves into the clamping groove 24 and the lower through hole 5 moves to the position of the first sliding rod 61, the limiting plate 64 is loosened, then the first spring 63 pulls the first sliding rod 61 to move rightwards by self-pulling force, then the first sliding rod 61 is clamped into the through hole 5, and then the installation of the, when the first slide bar 61 needs to be detached, the limit plate 64 is pulled to move the first slide bar 61 to the left, and the first spring 63 is shortened, when the first sliding rod 61 is separated from the through hole 5, people pull the connecting rod 4 downwards, and the through hole 5 at the lower part moves to the position of the first sliding rod 61, the limit plate 64 is loosened, then the first spring 63 pulls the first slide bar 61 to move rightwards by self-pulling force, then the first slide bar 61 is clamped into the through hole 5, the connecting rod 4 moves downwards to drive the trapezoidal block 9 to move downwards, when the trapezoidal blocks 9 are separated from the pulley 10, the second spring 15 pushes the first link plate 14 to rotate with its own thrust, then the first connecting plate 14 is separated from the second connecting plate 20, then the third spring 213 pulls the third sliding rod 211 and the catch rod 23 away from the catch groove 24 with its own pulling force, after the clamping rod 23 moves into the fourth groove 19, the lower mold 25 can be removed by people, and the people can finish disassembling the lower mold 25 at the moment.
In conclusion, 1 the noise reduction type stamping die, through the cooperation among the connecting rod 4, the through hole 5, the latch device 6, the handle 7, the trapezoidal block 9, the pulley 10, the sliding device 11, the first connecting plate 14, the second connecting plate 20, the second spring 15, the rotating shaft 17, the bearing 18, the elastic device 21, the baffle 22, the clamping rod 23 and the clamping groove 24, when people need to mount the lower die 25, the limiting plate 64 is pulled leftwards to separate the first sliding rod 61 from the through hole 5, then the connecting rod 4 is moved upwards by pushing the handle 7, then the trapezoidal block 9 pushes the pulley 10 to move away from the first groove 8, so that the second sliding rod 111 pushes the first connecting plate 14 to rotate, the first connecting plate 14 pushes the second connecting plate 20 to move, then the clamping rod 23 is clamped into the clamping groove 24, further, no special tool is used in the process of dismounting and mounting the lower die 25, and the time of people for overhauling or replacing the lower die 25 is reduced, the working efficiency of people is ensured.
2. This type of making an uproar stamping die falls through setting up first slide bar 61, and the shape of first slide bar 61 is the rectangle, and when making first slide bar 61 be connected with through-hole 5, connecting rod 4 can not rotate, makes the connection of trapezoidal piece 9 and pulley 10 more stable, and consequently second slide bar 111 pushes up the process of moving first connecting plate 14 pivoted more stable.
3. This type of making an uproar stamping die falls through setting up fixed block 12, makes second sliding sleeve 112 fixed more stable, makes second slide bar 111's side-to-side motion more stable, and then makes the motion of second connecting plate 20 and kelly 23 more stable to the process that makes kelly 23 card advance draw-in groove 24 is more stable, just the utility model discloses compact structure, reasonable in design, the practicality is strong.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a type of making an uproar stamping die falls, includes bottom plate (1), its characterized in that: the lower surface of the bottom plate (1) is fixedly connected with the top ends of the four supporting legs (2), the lower surface of the bottom plate (1) is fixedly connected with the upper surface of the U-shaped plate (3), the lower surface of the inner wall of the U-shaped plate (3) is in lap joint with the bottom end of the connecting rod (4), the right side surface of the connecting rod (4) is provided with a handle (7), the right side surface of the connecting rod (4) is provided with two through holes (5), a clamping device (6) is arranged in the through hole (5) above, the clamping device (6) is clamped on the left side surface of the U-shaped plate (3), the top end of the connecting rod (4) penetrates through a first groove (8) to be fixedly connected with the lower surface of a trapezoidal block (9), the first groove (8) is arranged on the lower surface of the bottom plate (1), two side surfaces of the trapezoidal block (9) are respectively lapped with pulleys (10), and the right end of the right pulley, the upper surface of the sliding device (11) is fixedly connected with the upper surface of the inner wall of the second groove (13) through a fixing block (12);
the second groove (13) is formed in the upper surface of the inner wall of the first groove (8), the right end of the sliding device (11) is in lap joint with the left side surface of the first connecting plate (14), the right side surface of the first connecting plate (14) is fixedly connected with the right side surface of the inner wall of the third groove (16) through a second spring (15), a rotating shaft (17) is clamped on the front surface of the first connecting plate (14), bearings (18) are sleeved at two ends of the rotating shaft (17), the two bearings (18) are respectively clamped on the front surface and the back surface of the inner wall of the third groove (16), the third groove (16) is formed in the right side surface of the inner wall of the second groove (13), and the upper surface of the first connecting plate (14) penetrates through the third groove (16) to be in lap joint with the left side surface of the second connecting plate (20);
the right side surface of the second connecting plate (20) is connected with an elastic device (21) in a clamping manner, the right end of the elastic device (21) is fixedly connected with the right side surface of the inner wall of a fourth groove (19), the fourth groove (19) is formed in the upper surface of the inner wall of a third groove (16), the left end of the elastic device (21) is fixedly connected with the right side surface of the baffle (22), the left side surface of the second connecting plate (20) is fixedly connected with the right end of the clamping rod (23), the upper surface of the bottom plate (1) is provided with a fifth groove (26), a lower die (25) is arranged in the fifth groove (26), clamping grooves (24) are formed in positions, corresponding to the clamping rod (23), of the two side surfaces of the lower die (25), an upper die (27) is arranged on the upper surface of the lower die (25), and the upper surface of the upper die (27) is fixedly connected with the lower surface of the top plate (29) through an electric push rod, the lower surface of the top plate (29) is fixedly connected with the upper surface of the bottom plate (1) through a support plate (30).
2. The noise reduction type press die according to claim 1, wherein: clamping device (6) include first slide bar (61), first slide bar (61) are located through-hole (5), the left end of first slide bar (61) and the right flank fixed connection of limiting plate (64), first sliding sleeve (62) have been cup jointed on the surface of first slide bar (61), the left surface of first sliding sleeve (62) joint at U-shaped plate (3), first spring (63) have been cup jointed on the surface of first slide bar (61), the both ends of first spring (63) respectively with the opposite face fixed connection of limiting plate (64) and first sliding sleeve (62).
3. The noise reduction type press die according to claim 1, wherein: the sliding device (11) comprises a second sliding rod (111), a second sliding sleeve (112) is sleeved on the surface of the second sliding rod (111), and the upper surface of the second sliding sleeve (112) is fixedly connected with the lower surface of the fixed block (12).
4. The noise reduction type press die according to claim 1, wherein: elastic device (21) includes third slide bar (211), the both ends of third slide bar (211) respectively with the right flank of fourth recess (19) inner wall and the right flank fixed connection of baffle (22), third sliding sleeve (212) has been cup jointed on the surface of third slide bar (211), third sliding sleeve (212) joint is at the right flank of second connecting plate (20), third spring (213) has been cup jointed on the surface of third slide bar (211), the both ends of third spring (213) respectively with the right flank of third recess (16) inner wall and the right flank fixed connection of third sliding sleeve (212).
5. The noise reduction type press die according to claim 1, wherein: the left side of backup pad (30) and the right side fixed connection of power (31), the left surface of power (31) and the right flank fixed connection of switch (32).
6. The noise reduction type press die according to claim 5, wherein: the output end of the power supply (31) is electrically connected with the input end of the switch (32), and the output end of the switch (32) is electrically connected with the input end of the electric push rod (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921482696.0U CN210847956U (en) | 2019-09-07 | 2019-09-07 | Noise reduction type stamping die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921482696.0U CN210847956U (en) | 2019-09-07 | 2019-09-07 | Noise reduction type stamping die |
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| Publication Number | Publication Date |
|---|---|
| CN210847956U true CN210847956U (en) | 2020-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921482696.0U Expired - Fee Related CN210847956U (en) | 2019-09-07 | 2019-09-07 | Noise reduction type stamping die |
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| CN (1) | CN210847956U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112170560A (en) * | 2020-10-30 | 2021-01-05 | 李爽 | Metal plate stamping arc-shaped die |
-
2019
- 2019-09-07 CN CN201921482696.0U patent/CN210847956U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112170560A (en) * | 2020-10-30 | 2021-01-05 | 李爽 | Metal plate stamping arc-shaped die |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200626 Termination date: 20210907 |
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| CF01 | Termination of patent right due to non-payment of annual fee |