CN107685103A - A kind of punched head for being easy to replace mould - Google Patents
A kind of punched head for being easy to replace mould Download PDFInfo
- Publication number
- CN107685103A CN107685103A CN201711003935.5A CN201711003935A CN107685103A CN 107685103 A CN107685103 A CN 107685103A CN 201711003935 A CN201711003935 A CN 201711003935A CN 107685103 A CN107685103 A CN 107685103A
- Authority
- CN
- China
- Prior art keywords
- fixedly connected
- spur gear
- support case
- mold
- rotating shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/34—Perforating tools; Die holders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/36—Perforating, i.e. punching holes using rotatable work or tool holders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/04—Movable or exchangeable mountings for tools
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The invention discloses a kind of punched head for being easy to replace mould,Including support case,Top plate and hydraulically extensible bar,The top of the support case is fixedly connected with top plate,Activity is plugged with hydraulically extensible bar in the top plate,The bottom of the hydraulically extensible bar is fixedly connected with active box,The first spur gear is provided with the active box,Pass through the first spur gear,The combination of trapezoid block and motor,Punching die is realized to change and clamp easily and fast,Second spur gear can ensure that mold presss from both sides cylinder energy Quick-clamped mold with engaging for the first spur gear,First lower plate and the second lower plate can clamp lower mould jointly,During more mold exchange,Reversely stir forward-reverse switch,Mold folder cylinder will be shifted up the clamping for departing from folder jacket casing,Mold, which can loosen, to drop,Spring promotes the lower mould of trapezoid block ejection,While realizing the quick-replaceable of punching die,Instrument is avoided to prize the damage caused to lower mould.
Description
Technical field
The present invention relates to machining technology field, specially a kind of punched head for being easy to replace mould.
Background technology
Hydraulic piercing press is electrodynamic pump and the first two part composition that works, suitable for various steel, iron, copper, aluminium sheet, into shaped steel,
The drilling operations such as channel-section steel, I-steel, small volume is in light weight, easily operated, laborsaving and quick punching, for hole of different shapes
, it is necessary to change different punching dies, existing hydraulic piercing press needs to change upper and lower mould manually, wastes time and energy in hole, and
It cannot be guaranteed that mould is clamped during installation, being easily caused pass during punching is not marked, and mould is easily damaged.
The content of the invention
It is an object of the invention to provide a kind of punched head for being easy to replace mould, to solve to carry in above-mentioned background technology
The problem of going out.
To achieve the above object, the present invention provides following technical scheme：A kind of punched head for being easy to replace mould, including
Support case, top plate and hydraulically extensible bar, the top of the support case are fixedly connected with top plate, in the top plate activity be plugged with liquid
Expansion link is pressed, the bottom of the hydraulically extensible bar is fixedly connected with active box, the first spur gear is provided with the active box, described
The bottom of first spur gear is fixedly connected with mold folder cylinder, and the mold folder cylinder activity runs through the bottom wall of active box, described
Screw thread is socketed with folder jacket casing on mold folder cylinder, and the both sides of the folder jacket casing pass through head rod and the lateral wall of active box
It is fixedly connected, the first spur gear activity runs through the side wall of active box, and is engaged with the second spur gear, second straight-tooth
Wheel activity runs through the side wall of support case, and the center of the second spur gear is fixed and is plugged with first rotating shaft, solid in the first rotating shaft
Surely there is socket second bevel gear, fixed plate is fixedly connected with the madial wall of the support case, the first rotating shaft is away from second
One end of spur gear is rotatably connected in fixed plate, is engaged with first bevel gear below the second bevel gear, and described first
The center of bevel gear is fixed and is plugged with the second rotating shaft, and fixed cover is connected to the second flywheel, second rotating shaft in second rotating shaft
One end away from first bevel gear is fixedly connected with the output end of motor, and the motor passes through forward-reverse switch and external power source phase
Connection, and motor is fixedly connected on the madial wall of support case, second flywheel is connected with the first flywheel by belt, described
The center rotating of first flywheel is plugged with the 3rd rotating shaft, and the 3rd rotating shaft is fixedly connected on the madial wall of support case, and described first
The other end of flywheel is fixedly connected with screw rod, and swivel nut is socketed with the screw rod, and the top of the swivel nut is slided by the first sliding block
On the first chute that the dynamic bottom for being connected to fixed plate is opened up, side of the swivel nut away from the first flywheel passes through the second connection
Bar is fixedly connected with the first lower plate, and the bottom of first lower plate is fixedly connected with the second sliding block, and the first lower plate is remote
Side from swivel nut is provided with trapezoid block, and the second chute is offered on the trapezoid block, and second sliding block is slidably connected at the 3rd
On chute, the bottom of the trapezoid block is connected by multiple springs with the inner bottom wall of support case, and the trapezoid block is away from second
The side of chute is fixedly connected with the second rack, and the opposite side of the second rack is engaged with the 3rd spur gear, the 3rd straight-tooth
Wheel is rotatably connected on the inwall of support case, and the opposite side of the support case is engaged with the first rack, and first rack slides
It is connected on the 3rd chute that the madial wall of support case is opened up, the top of first rack is fixedly connected with jacking block, described
The top of jacking block is provided with rotating disk, and the rotating disk is rotatably connected on the inwall of support case, and push rod is fixedly connected with the rotating disk,
The side of madial wall of the rotating disk away from support case is provided with the second lower plate, and second lower plate is slided by L-type bar to be connected
It is connected on the 4th chute that support case inner roof wall is opened up.
Preferably, the top of the trapezoid block offers cone tank.
Preferably, the one end of the push rod away from rotating disk is fixedly connected with rubber press.
Preferably, the number of the spring is no less than four, and is equally distributed on the bottom of trapezoid block.
Preferably, the teeth length of second spur gear is more than the teeth length of the first spur gear, and the second spur gear
Teeth length be less than folder jacket casing length.
Preferably, the length of the push rod is more than height of the 3rd spur gear apart from ground.
Preferably, the mold folder cylinder is made up of two discontiguous arc-like sheets.
Preferably, the first lower plate and the relative side of the second lower plate have been fixedly connected with block rubber.
Compared with prior art, the beneficial effects of the invention are as follows：By the combination of the first spur gear, trapezoid block and motor,
Realize punching die to change and clamp easily and fast, the second spur gear can ensure that mold presss from both sides with engaging for the first spur gear
Cylinder energy Quick-clamped mold, when the first lower plate and the second lower plate can clamp lower mould, more mold exchange jointly, is reversely stirred
Forward-reverse switch, mold folder cylinder will be shifted up the clamping for departing from folder jacket casing, and mold, which can loosen, to drop, and spring promotes trapezoid block top
Go out lower mould, while realizing the quick-replaceable of punching die, avoid instrument from prizing the damage caused to lower mould.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention.
In figure：Support case 1, top plate 2, hydraulically extensible bar 3, active box 4, the first spur gear 5, mold folder cylinder 6, folder jacket casing
7th, fixed plate 8, the first lower plate 9, the second lower plate 10, rotating disk 11, push rod 12, jacking block 13, the first rack 14, the 3rd spur gear
15th, spring 16, trapezoid block 17, the second spur gear 18, screw rod 19, swivel nut 20, the first flywheel 21, belt 22, first bevel gear 23,
Second flywheel 24, motor 25, second bevel gear 26, first rotating shaft 27.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Referring to Fig. 1, the present invention provides a kind of technical scheme：
A kind of punched head for being easy to replace mould, including support case 1, top plate 2 and hydraulically extensible bar 3, the top of support case 1
End be fixedly connected with top plate 2, in top plate 2 activity be plugged with hydraulically extensible bar 3, the bottom of hydraulically extensible bar 3 is fixedly connected with work
Dynamic case 4, active box 4 is interior to be provided with the first spur gear 5, and the bottom of the first spur gear 5 is fixedly connected with mold folder cylinder 6, mold
Folder cylinder 6 is made up of two discontiguous arc-like sheets, and the activity of mold folder cylinder 6 runs through the bottom wall of active box 4, and mold is pressed from both sides on cylinder 6
Screw thread is socketed with folder jacket casing 7, mold folder cylinder 6 is progressively clamped mold when moving down, and presss from both sides the both sides of jacket casing 7 by the
One connecting rod is fixedly connected with the lateral wall of active box 4, and the activity of the first spur gear 5 runs through the side wall of active box 4, and is engaged with
Second spur gear 18, the activity of the second spur gear 18 runs through the side wall of support case 1, and the center of the second spur gear 18 is fixed and is plugged with
First rotating shaft 27, the teeth length of the second spur gear 18 are more than the teeth length of the first spur gear 5, and the tooth of the second spur gear 18
Dental length is less than the length of folder jacket casing 7, it is ensured that the rotation of the first spur gear 5 does not depart from the second spur gear 18, first rotating shaft when moving down
Socket second bevel gear 26 is fixed with 27, is fixedly connected with fixed plate 8 on the madial wall of support case 1, first rotating shaft 27 is remote
One end of second spur gear 18 is rotatably connected in fixed plate 8, and the lower section of second bevel gear 26 is engaged with first bevel gear 23, the
The center of one bevel gear 23 is fixed and is plugged with the second rotating shaft, and fixed cover is connected to the second flywheel 24 in the second rotating shaft, and the second rotating shaft is remote
One end from first bevel gear 23 is fixedly connected with the output end of motor 25, and motor 25 passes through forward-reverse switch and external power source phase
Connection, and motor 25 is fixedly connected on the madial wall of support case 1, the second flywheel 24 is connected with the first flywheel by belt 22
21, the center rotating of the first flywheel 21 is plugged with the 3rd rotating shaft, and the 3rd rotating shaft is fixedly connected on the madial wall of support case 1, the
The other end of one flywheel 21 is fixedly connected with screw rod 19, and swivel nut 20 is socketed with screw rod 19, and the top of swivel nut 20 is slided by first
On the first chute that the bottom that block is slidably connected at fixed plate 8 is opened up, side of the swivel nut 20 away from the first flywheel 21 passes through
Two connecting rods are fixedly connected with the first lower plate 9, and the bottom of the first lower plate 9 is fixedly connected with the second sliding block, and first time folder
Side of the plate 9 away from swivel nut 20 is provided with trapezoid block 17, and the top of trapezoid block 17 offers cone tank, prevents after taking out lower mould,
The damage that mold drops to trapezoid block 17, the second chute is offered on trapezoid block 17, and the second sliding block is slidably connected at the 3rd cunning
On groove, the bottom of trapezoid block 17 is connected by multiple springs 16 with the inner bottom wall of support case 1, and the number of spring 16 is no less than four
It is individual, and the bottom of trapezoid block 17 is equally distributed on, side of the trapezoid block 17 away from the second chute is fixedly connected with the second rack, and
The opposite side of second rack is engaged with the 3rd spur gear 15, and the 3rd spur gear 15 is rotatably connected on the inwall of support case 1, support
The opposite side of case 1 is engaged with the first rack 14, the 3rd cunning that the madial wall that the first rack 14 is slidably connected at support case 1 is opened up
On groove, the top of the first rack 14 is fixedly connected with jacking block 13, and the top of jacking block 13 is provided with rotating disk 11, and rotating disk 11 is rotatably connected on
On the inwall of support case 1, push rod 12 is fixedly connected with rotating disk 11, the one end of push rod 12 away from rotating disk 11 is fixedly connected with rubber
Briquetting, the length of push rod 12 are more than height of the 3rd spur gear 15 apart from ground, and the one of madial wall of the rotating disk 11 away from support case 1
Side is provided with the second lower plate 10, and what the second lower plate 10 was slidably connected at that the inner roof wall of support case 1 opened up by L-type bar the 4th slides
On groove, the first lower plate 9 and the relative side of the second lower plate 10 have been fixedly connected with block rubber, increase and the friction of lower mould
Power.
Operation principle：By in mold insertion mold folder cylinder 6, lower mould is put into support case 1, stirs positive and negative turn on
Close, motor 25, which rotates, drives the flywheel 24 of first bevel gear 23 and second to rotate, and first bevel gear 23 engages second bevel gear 26
Rotate, drive the second spur gear 18 to engage the first spur gear 5 and rotate, drive the mold folder rotation of cylinder 6 to move down and connect with folder jacket casing 7
Connect, mold folder cylinder 6 is clamped mold, the second flywheel 24 drives the first flywheel 21 to rotate, and screw rod 19, which rotates, makes swivel nut 20 left
Move, drive the first lower plate 9 to move to left, while mould makes trapezoid block 17 move down the 3rd spur gear 15 of engagement under manual depression, makes the
One rack 14 moves up, and jacking block 13 pushes the second lower plate 10 of extruding of push rod 12 and moved to right, and after upper and lower mold cramping, closing motor is
Can, during more mold exchange, forward-reverse switch is reversely stirred, mold folder cylinder 6 will be shifted up, and loosen the clamping to mold, under second
Clamping plate 10 is moved to right, and lower die pressure is reduced and spring 16 can push lower mould and rise, and realizes the quick-replaceable of punching die.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of changes, modification can be carried out to these embodiments, replace without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (8)
1. a kind of punched head for being easy to replace mould, including support case (1), top plate (2) and hydraulically extensible bar (3), its feature
It is：The top of the support case (1) is fixedly connected with top plate (2), in the top plate (2) activity be plugged with hydraulically extensible bar
(3), the bottom of the hydraulically extensible bar (3) is fixedly connected with active box (4), and the first spur gear is provided with the active box (4)
(5), the bottom of first spur gear (5) is fixedly connected with mold folder cylinder (6), and described mold folder cylinder (6) activity runs through
The bottom wall of active box (4), the mold press from both sides screw thread on cylinder (6) and are socketed with folder jacket casing (7), and the both sides of the folder jacket casing (7) are equal
It is fixedly connected by head rod with the lateral wall of active box (4), the first spur gear (5) activity runs through active box (4)
Side wall, and be engaged with the second spur gear (18), the second spur gear (18) activity runs through the side wall of support case (1), and
The center of second spur gear (18) is fixed and is plugged with first rotating shaft (27), and the cone of socket second is fixed with the first rotating shaft (27)
Gear (26), fixed plate (8) is fixedly connected with the madial wall of the support case (1), the first rotating shaft (27) is away from second
One end of spur gear (18) is rotatably connected in fixed plate (8), and the first cone tooth is engaged with below the second bevel gear (26)
Take turns (23), the center of the first bevel gear (23), which is fixed, is plugged with the second rotating shaft, and fixed cover is connected to the in second rotating shaft
Two flywheels (24), the one end of second rotating shaft away from first bevel gear (23) are fixedly connected with the output end of motor (25), institute
State motor (25) by forward-reverse switch with external power source to be connected, and motor (25) is fixedly connected on the inner side of support case (1)
On wall, second flywheel (24) is connected with the first flywheel (21) by belt (22), and the center of first flywheel (21) turns
Dynamic to be plugged with the 3rd rotating shaft, the 3rd rotating shaft is fixedly connected on the madial wall of support case (1), first flywheel (21) it is another
End is fixedly connected with screw rod (19), swivel nut (20) is socketed with the screw rod (19), the top of the swivel nut (20) passes through first
On the first chute that the bottom that sliding block is slidably connected at fixed plate (8) is opened up, the swivel nut (20) is away from the first flywheel (21)
Side the first lower plate (9) is fixedly connected with by the second connecting rod, the bottom of first lower plate (9) is fixedly connected with
Second sliding block, and side of the first lower plate (9) away from swivel nut (20) is provided with trapezoid block (17), is opened up on the trapezoid block (17)
There is the second chute, second sliding block is slidably connected on the 3rd chute, and the bottom of the trapezoid block (17) passes through multiple springs
(16) inner bottom wall with support case (1) is connected, and side of the trapezoid block (17) away from the second chute is fixedly connected with second
Rack, and the opposite side of the second rack is engaged with the 3rd spur gear (15), the 3rd spur gear (15) is rotatably connected on support
On the inwall of case (1), the opposite side of the support case (1) is engaged with the first rack (14), and first rack (14), which is slided, to be connected
It is connected on the 3rd chute that the madial wall of support case (1) is opened up, the top of first rack (14) is fixedly connected with jacking block
(13), the top of the jacking block (13) is provided with rotating disk (11), and the rotating disk (11) is rotatably connected on the inwall of support case (1),
Push rod (12) is fixedly connected with the rotating disk (11), the side of madial wall of the rotating disk (11) away from support case (1) is provided with
Second lower plate (10), second lower plate (10) be slidably connected at that support case (1) inner roof wall opened up by L-type bar
On four chutes.
A kind of 2. punched head for being easy to replace mould according to claim 1, it is characterised in that：The trapezoid block (17)
Top offer cone tank.
A kind of 3. punched head for being easy to replace mould according to claim 1, it is characterised in that：The push rod (12) is remote
One end from rotating disk (11) is fixedly connected with rubber press.
A kind of 4. punched head for being easy to replace mould according to claim 1, it is characterised in that：The spring (16)
Number is no less than four, and is equally distributed on the bottom of trapezoid block (17).
A kind of 5. punched head for being easy to replace mould according to claim 1, it is characterised in that：Second spur gear
(18) teeth length is more than the teeth length of the first spur gear (5), and the teeth length of the second spur gear (18) is less than folder cylinder
Cover the length of (7).
A kind of 6. punched head for being easy to replace mould according to claim 1, it is characterised in that：The push rod (12)
Length is more than height of the 3rd spur gear (15) apart from ground.
A kind of 7. punched head for being easy to replace mould according to claim 1, it is characterised in that：The mold presss from both sides cylinder
(6) it is made up of two discontiguous arc-like sheets.
A kind of 8. punched head for being easy to replace mould according to claim 1, it is characterised in that：First lower plate (9)
Relative side has been fixedly connected with block rubber with the second lower plate (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711003935.5A CN107685103A (en) | 2017-10-24 | 2017-10-24 | A kind of punched head for being easy to replace mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711003935.5A CN107685103A (en) | 2017-10-24 | 2017-10-24 | A kind of punched head for being easy to replace mould |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107685103A true CN107685103A (en) | 2018-02-13 |
Family
ID=61154796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711003935.5A Withdrawn CN107685103A (en) | 2017-10-24 | 2017-10-24 | A kind of punched head for being easy to replace mould |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107685103A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108704971A (en) * | 2018-05-23 | 2018-10-26 | 安徽机电职业技术学院 | A kind of semi-automation perforating device |
| CN108789044A (en) * | 2018-06-25 | 2018-11-13 | 浙江长兴鼎昌金属制品有限公司 | A kind of aluminium alloy extrusions groove grinding device |
| CN109226528A (en) * | 2018-10-18 | 2019-01-18 | 浙江东信机械有限公司 | A kind of hardware mould and etching knife assist docking facilities |
| CN110153815A (en) * | 2019-05-14 | 2019-08-23 | 嘉兴贵复贸易有限公司 | A kind of wheel hub sander |
| CN110238694A (en) * | 2018-03-08 | 2019-09-17 | 王勇 | A kind of industrial machinery lathe anti-splash device |
| CN110238277A (en) * | 2018-03-09 | 2019-09-17 | 宁波君铭钣金有限公司 | A kind of metal plate punching mold of replaceable formed punch |
| CN112845760A (en) * | 2020-12-18 | 2021-05-28 | 江西省天奇汽车零部件有限公司 | Die pressing device |
| CN113020376A (en) * | 2021-03-02 | 2021-06-25 | 天津希利汽车部品有限公司 | Stamping device and control method thereof |
| CN113290103A (en) * | 2021-04-27 | 2021-08-24 | 芜湖中科飞机制造有限公司 | High-temperature die assembly for producing spare and accessory parts of aviation aircraft |
| CN113426898A (en) * | 2021-06-04 | 2021-09-24 | 刘欢 | Hot stamping die |
-
2017
- 2017-10-24 CN CN201711003935.5A patent/CN107685103A/en not_active Withdrawn
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110238694A (en) * | 2018-03-08 | 2019-09-17 | 王勇 | A kind of industrial machinery lathe anti-splash device |
| CN110238277A (en) * | 2018-03-09 | 2019-09-17 | 宁波君铭钣金有限公司 | A kind of metal plate punching mold of replaceable formed punch |
| CN108704971A (en) * | 2018-05-23 | 2018-10-26 | 安徽机电职业技术学院 | A kind of semi-automation perforating device |
| CN108789044A (en) * | 2018-06-25 | 2018-11-13 | 浙江长兴鼎昌金属制品有限公司 | A kind of aluminium alloy extrusions groove grinding device |
| CN108789044B (en) * | 2018-06-25 | 2020-08-14 | 泾县凡泽科技服务有限公司 | Aluminum alloy ex-trusions recess grinding device |
| CN109226528B (en) * | 2018-10-18 | 2024-01-23 | 浙江东信机械有限公司 | Auxiliary butt joint device for hardware die and etching knife |
| CN109226528A (en) * | 2018-10-18 | 2019-01-18 | 浙江东信机械有限公司 | A kind of hardware mould and etching knife assist docking facilities |
| CN110153815A (en) * | 2019-05-14 | 2019-08-23 | 嘉兴贵复贸易有限公司 | A kind of wheel hub sander |
| CN112845760B (en) * | 2020-12-18 | 2022-05-31 | 江西省天奇汽车零部件有限公司 | Die pressing device |
| CN112845760A (en) * | 2020-12-18 | 2021-05-28 | 江西省天奇汽车零部件有限公司 | Die pressing device |
| CN113020376A (en) * | 2021-03-02 | 2021-06-25 | 天津希利汽车部品有限公司 | Stamping device and control method thereof |
| CN113290103A (en) * | 2021-04-27 | 2021-08-24 | 芜湖中科飞机制造有限公司 | High-temperature die assembly for producing spare and accessory parts of aviation aircraft |
| CN113426898A (en) * | 2021-06-04 | 2021-09-24 | 刘欢 | Hot stamping die |
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Application publication date: 20180213 |
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