CN106424674B - A kind of hydraulic oil cylinder driving punching trimming mode structure and its punching method for cutting edge - Google Patents
A kind of hydraulic oil cylinder driving punching trimming mode structure and its punching method for cutting edge Download PDFInfo
- Publication number
- CN106424674B CN106424674B CN201610872267.9A CN201610872267A CN106424674B CN 106424674 B CN106424674 B CN 106424674B CN 201610872267 A CN201610872267 A CN 201610872267A CN 106424674 B CN106424674 B CN 106424674B
- Authority
- CN
- China
- Prior art keywords
- upper mold
- punching
- oil cylinder
- trimming
- hydraulic oil
- 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.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D31/00—Cutting-off surplus material, e.g. gates; Cleaning and working on castings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Punching Or Piercing (AREA)
Abstract
The invention discloses a kind of hydraulic oil cylinder driving punching trimming mode structure, including upper mold seat, die holder, it is separately positioned on upper mold seat, cope plate on die holder, lower template and upper mold, lower die, the upper mold periphery is equipped with the taper profiling edge of a knife, lower die is equipped with punching pin moving up and down, upper mold, lower die, which is bolted, to be separately fixed in cope plate and lower template, upper mold seat and upper mold cushion block, cope plate is bolted, die holder and lower die cushion block, lower template is bolted, drive cylinder has been bolted on die holder, drive cylinder drives punching pin to move up and down by connecting plate.The invention also discloses a kind of punching method for cutting edge using the hydraulic oil cylinder driving punching trimming mode structure.Excision product cinder ladle, runner, product blank hole inner burr can be achieved in the present invention, reduces manual labor amount, completely burr work can be replaced to work, while improves production efficiency, reduces production cost.
Description
Technical field
The present invention relates to blank product trimming and burr removal technology field, and in particular to a kind of hydraulic oil cylinder driving punching edger
Structure and its punching method for cutting edge.
Background technology
At present, the Exhausting Systems such as cinder ladle, exhaust fan can be equipped with casting when die casting or moulding design, its purpose exists
Gas in by cavity is discharged to outside mould, and distalmost end cold burden is discharged in cinder ladle, to reduce product defects, lifts product
Intensity, while the blank that Foundry Production goes out is usually with some overlaps, burr etc..
After the completion of die casting, cinder ladle and more clouts can be ejected together with casting, in order to facilitate the implementation of subsequent process steps,
Cinder ladle and product burr must first be removed.Traditional approach is by blank periphery cinder ladle and more by first worker using waddy
Clout directly removes, and then transfers to second worker to remove the particularly hole inner burr of unnecessary burr in blank using file.People
The shortcomings that work removes is：Worker's amount of labour is big, deburring precision is low, and low production efficiency, is unfavorable for product mass production.
The content of the invention
In order to solve the problems, such as that existing production process is cumbersome, the present invention provides one kind can efficiently remove product blank periphery slag
The hydraulic oil cylinder driving punching trimming mode structure and its punching method for cutting edge of bag, runner and hole inner burr.
The concrete scheme of the present invention is as follows：
A kind of hydraulic oil cylinder driving punching trimming mode structure, including upper mold seat, die holder, it is separately positioned on upper mold seat, die holder
On cope plate, lower template and upper die and lower die, upper mold periphery is equipped with the taper profiling edge of a knife, lower die equipped with can on move down
Dynamic punching pin, upper die and lower die, which are bolted, to be separately fixed in cope plate and lower template, upper mold seat and upper die-cushion
Block, cope plate are bolted, and die holder is bolted with lower die cushion block, lower template, and drive cylinder has been bolted on die holder,
Drive cylinder drives punching pin to move up and down by connecting plate.
Further, the connecting plate is pulled to connect with first and pulled including the second connection that superposition up and down is set, and described first
Connecting plate lower face is equipped with the T-slot for being used for connecting the T-shaped telescopic shaft in oil cylinder front end, and the first connecting plate and the second connecting plate utilize spiral shell
Tether and connect.
Further, first connecting plate is equipped with the trapezoid groove structure of connection punching pin, passes through the first connecting plate, the
Two connecting plates fix punching pin.
Further, second connecting plate is equipped with counter sink, for connecting punching pin.
Further, the cope plate is vertically installed with guide sleeve, and vertical be equipped with is slidably matched with the guide sleeve in lower template
Guide post.
Further, the die holder is equipped with limited block.
Further, the punching pin coordinates with product objective interporal lacuna, 0.1 ~ 0.5mm of fit clearance.
A kind of punching method for cutting edge using the hydraulic oil cylinder driving punching trimming mode structure, includes the following steps：
1）Control upper mold seat to be maintained at upper mold and lower die in certain distance by trimming control system of machine, drive at the same time
Dynamic cylinder oil unloading so that punching pin keeps returning to the following state of lower mould surface, is at this time placed on target blank product imitative
In shape lower die, trimming and punching are waited；
2）Upper mold seat drives upper mold to move down, and blank periphery is now removed using the outer peripheral taper imitation-shaped knife cause for gossip of upper mold
Cinder ladle and running gate system effect, the upper mold does downwards retarded motion during trimming, and translational speed is by fast and slow；
3）To ensure that punching acts on precision, upper mold is kept product impaction state is motionless after the completion of trimming, and drive cylinder is led to
Oil loading, driving punching pin move up, and remove blank hole inner burr, oil cylinder stroke is by being eliminated depending on the length of hole；
4）Trimming is unloaded with hydraulic oil after the completion of punching, and drive cylinder is first retracted, after oil cylinder to be driven is retracted, the upper mold
Delay retracts original state and keeps certain distance with lower die after a certain period of time, gives certain placement blank product space, so far rushes
Hole, trimming terminate, and take out product.
Further, the upper mold does downwards the uniformly retarded motion of 1m/s to 0.1m/s during trimming.
Further, the upper mold retracts original state after postponing 2 ~ 5s and keeps certain distance with lower die.
Compared with prior art, beneficial effects of the present invention are as follows：The mode that punching of the present invention is combined with trimming, to casting
Make production blank and carry out the peripheral cinder ladle of disposable excision, runner effect, while hole internal hair is realized by hydraulic oil cylinder driving punching pin
The clearing process of thorn, realizes efficient deburring effect, and the present invention greatly reduces manual labor amount, can replace burr work work completely
Make, improve production efficiency, reduce production cost.
Brief description of the drawings
Fig. 1 is the punching edger overall structure diagram of the embodiment of the present invention.
Fig. 2 is the trimming effect schematic diagram of the embodiment of the present invention.
Fig. 3 is the punching effect schematic diagram of the embodiment of the present invention.
Fig. 4 is the lower die structure figure of the embodiment of the present invention.
In figure：1st, upper mold seat, 2, cope plate, 3, guide sleeve, 4, guide post, 5, punching pin, 6, lower template, 7, lower die cushion block, 8,
Die holder, 9, drive cylinder, 10, limited block, the 11, first connecting plate, the 12, second connecting plate, 13, lower die, 14, blank product,
15th, upper mold, 16 upper mold cushion blocks.
Embodiment
Below in conjunction with Figure of description and embodiment, the invention will be further described：
As shown in Figs 1-4, a kind of hydraulic oil cylinder driving punching trimming mode structure, including upper mold seat 1, cope plate 2, upper mold 15, under
Die holder 8, lower template 6, cushion block, lower die 13, guide post 4, guide sleeve 3, limited block 10, drive cylinder 9, punching pin 5, connecting plate, upper mold
Through hole is equipped with seat 1, die holder 8 and each cushion block, correspondence position cope plate 2, lower template 6 are equipped with threaded hole, and bolt passes through
Upper mold seat 1, die holder 8 and each cushion block are connected with cope plate 2, lower template 6 respectively, and upper mold 15, lower die 13 are bolted point
Cope plate 2 is not fixed on, in lower template 6, the periphery of upper mold 15 is equipped with the taper profiling edge of a knife, on cope plate 2, lower template 6
Guide sleeve 3, guide post 4 are respectively equipped with, guide post 4,3 rear end of guide sleeve are designed to step type, while also are provided with cope plate 2, lower template 6
Corresponding counter sink, guide post 4, guide sleeve 3 are placed in counter sink, and are locked guide post 4, guide sleeve 3 using cushion block, upper mold seat 1,
Upper mold 15 can be moved up and down along 4 direction of guide post, be bolted on die holder 8 and be fixed with drive cylinder 9, hydraulic oil cylinder driving connecting plate is simultaneously
Punching pin 5 is driven to be moved up and down along 4 direction of guide post.
The connecting plate include up and down superposition set second connection pull 12 and first connection pull 11, first connecting plate
11 lower faces are equipped with the T-slot for being used for connecting the T-shaped telescopic shaft in oil cylinder front end, and the first connecting plate 11 and the second connecting plate 12 utilize spiral shell
Tether and connect.First connecting plate 11 is equipped with T-slot and is used to connect the T-shaped telescopic shaft in 9 front end of drive cylinder, the first connecting plate 11 and the
Two connecting plates 12 are bolted, and punching pin 5 is fixed in counter sink set in the second connecting plate 12, utilize the first connection
Plate 11 locks punching pin 5, and the punching pin coordinates with product objective interporal lacuna, 0.1 ~ 0.5mm of fit clearance, preferably 0.3mm.Under
Die holder 8 is equipped with limited block 10, for connecting plate lower limit.
The present embodiment is by the taper profiling edge of a knife designed in upper mold 15 by blank product periphery cinder ladle, running gate system one
Secondary property removes, and ensures trimming direction by guide sleeve 3 set by upper mold 15, lower die 13, guide post 4, lifts trimming precision, utilize lower die
Set drive cylinder 9 on 8 is sat, the first connecting plate 11 of driving is moved up with the second connecting plate 12 and punching pin 5, to remove
Burr is remained in blank product hole.
As shown in Figures 2 and 3, using the punching method for cutting edge of the hydraulic oil cylinder driving punching trimming mode structure, including it is as follows
Step：
1）Upper mold seat 1 is controlled to be maintained at upper mold 15 and lower die 13 in certain distance by trimming control system of machine,
9 oil pressure unloading of drive cylinder at the same time so that punching pin 5 keeps returning to the following state in 13 surface of lower die, at this time by target blank
Product is placed in profiling lower die, waits trimming and punching；
2）Upper mold seat 1 drives upper mold 15 to move down, and defeathering is now removed using the outer peripheral taper imitation-shaped knife cause for gossip of upper mold 15
Base periphery cinder ladle and running gate system effect, 15 translational speed of upper mold is the uniformly retarded motion of 1m/s to 0.1m/s by fast and slow, anti-
Only cut wound product；
3）To ensure that punching acts on precision, upper mold 15 keeps that product impaction state is motionless after the completion of trimming, drive cylinder 9
Logical oil loading, driving punching pin 5 move up, and remove blank hole inner burr, oil cylinder stroke is by being eliminated depending on the length of hole；
4）Trimming is unloaded with hydraulic oil after the completion of punching, and drive cylinder 9 is first retracted, and oil cylinder 9 to be driven retracts rear upper mold 15
Also original state is retracted after 2 ~ 5s of delay and keeps certain distance with lower die, gives and necessarily places blank product space, so far punching,
Trimming terminates, and takes out product.
Traditional mode of production mode is, it is necessary to which two workers go completion to take cinder ladle, cast respectively after blank product is produced
System and repair burr work, so in product mass production, worker labour and production cost will be considerably increased, at the same time
Since two procedures use manual type, the production cycle time is adds somewhat to, reduces production efficiency.
The present embodiment feature is punching, trimming two procedures, the first step such as Fig. 2 can be achieved at the same time compared with traditional approach
Shown upper mold 15 separates holding certain distance with lower die 13, and blank product is positioned in lower die 13；Second step, upper mold 15 are downward
Mobile to realize that trimming works, after the completion for the treatment of trimming, upper mold 15 remains stationary as upward into the 3rd step, lower end hydraulic oil cylinder driving punching pin
Mobile to realize that cleaning hole inner burr works, so far punching, trimming are completed；Four steps, drive cylinder 9 are first retracted, subsequent upper mold
15 move up reset.
In another embodiment, a kind of punching method for cutting edge using the hydraulic oil cylinder driving punching trimming mode structure, including
Following steps：
1）Motionless, 9 oil pressure unloading of drive cylinder at upper mold 15 and 13 distance 1000mm of lower die is kept, at the first connecting plate 11
Above limited block 10, contacted with limited block 10, blank product is placed in lower die 13 by a worker, and manually slight adjustment
Product, is ajusted；
2）Press and start trimming machine start button, bead cutter control system will drive upper mold 15 to move down, mobile speed
Degree is arranged to initial velocity 1m/s, and uniformly retarded motion, speed is reduced to when the edge of a knife distance product upper surface 20mm of upper mold 15
0.1m/s, to ensure trimming quality；
3）After the completion of trimming, upper mold 15 keeps compression Product Status motionless, the logical oil of drive cylinder 9, driving pressure 50MPa,
Driving punching pin 5 to drive up realization goes pore burr removing to act on, oil cylinder stroke 12mm, the long 10mm of holes of products, punching pin and production
Sample wells clearance fit, fit clearance take 0.1mm；
4）After the completion of trimming, punching, drive cylinder 9 hydraulic oil in lower end first unloads so that and punching pin 5 moves down, and first
Connecting plate 11 falls on limited block 10, and upper mold 15 moves up die sinking and resets after postponing 2s afterwards, waits second.
The mode that punching of the present invention is combined with trimming, Foundry Production blank is carried out the peripheral cinder ladle of disposable excision,
Runner acts on, while the clearing process of hole inner burr is realized by hydraulic oil cylinder driving punching pin, and utilization and its work substitute artificial labor
It is dynamic, deburring efficiency and precision are improved, the present invention greatly reduces manual labor amount, completely burr work can be replaced to work, improved
Production efficiency, reduces production cost.
The above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not to the present invention
Embodiment restriction.For those of ordinary skill in the field, can also make on the basis of the above description
Other various forms of changes or variation.There is no necessity and possibility to exhaust all the enbodiments.It is all the present invention
All any modification, equivalent and improvement made within spirit and principle etc., should be included in the protection of the claims in the present invention
Within the scope of.
Claims (9)
1. a kind of hydraulic oil cylinder driving punching trimming mode structure, including upper mold seat, die holder, it is separately positioned on upper mold seat, on die holder
Cope plate, lower template and upper die and lower die, it is characterised in that：The upper mold periphery is equipped with the taper profiling edge of a knife, and lower die is equipped with
Punching pin moving up and down, upper die and lower die, which are bolted, to be separately fixed in cope plate and lower template, upper mold seat with
Upper mold cushion block, cope plate are bolted, and die holder is bolted with lower die cushion block, lower template, and drive has been bolted on die holder
Dynamic oil cylinder, drive cylinder drive punching pin to move up and down by connecting plate；
The connecting plate is pulled to connect with first and pulled including the second connection that superposition up and down is set, and the first connecting plate lower face is set
The T-slot of the connection T-shaped telescopic shaft in oil cylinder front end is useful for, the first connecting plate is utilized with the second connecting plate and is bolted.
A kind of 2. hydraulic oil cylinder driving punching trimming mode structure according to claim 1, it is characterised in that：First connecting plate
The trapezoid groove structure of connection punching pin is equipped with, is fixed punching pin by the first connecting plate, the second connecting plate.
A kind of 3. hydraulic oil cylinder driving punching trimming mode structure according to claim 1, it is characterised in that：Second connection
Plate is equipped with counter sink, for connecting punching pin.
A kind of 4. hydraulic oil cylinder driving punching trimming mode structure according to claim 1, it is characterised in that：The cope plate is vertical
Guide sleeve is provided with, the guide post being slidably matched with the guide sleeve is vertically equipped with lower template.
A kind of 5. hydraulic oil cylinder driving punching trimming mode structure according to claim 1, it is characterised in that：On the die holder
Equipped with limited block.
A kind of 6. hydraulic oil cylinder driving punching trimming mode structure according to claim 1, it is characterised in that：The punching pin and production
Items mark interporal lacuna coordinates, 0.1 ~ 0.5mm of fit clearance.
7. a kind of punching method for cutting edge using the hydraulic oil cylinder driving punching trimming mode structure as any one of claim 1 to 6,
Include the following steps：
1）Control upper mold seat to be maintained at upper mold and lower die in certain distance by trimming control system of machine, while drive oil
Cylinder oil pressure unloading so that punching pin keeps returning to the following state of lower mould surface, and target blank product is placed under profiling at this time
On mould, trimming and punching are waited；
2）Upper mold seat drives upper mold to move down, and blank periphery cinder ladle is now removed using the outer peripheral taper imitation-shaped knife cause for gossip of upper mold
And running gate system effect, the upper mold does downwards retarded motion during trimming, and translational speed is by fast and slow；
3）To ensure that punching acts on precision, upper mold is kept product impaction state is motionless after the completion of trimming, and drive cylinder is led to oil and added
Carry, driving punching pin moves up, and removes blank hole inner burr, oil cylinder stroke is by being eliminated depending on the length of hole；
4）Trimming is unloaded with hydraulic oil after the completion of punching, and drive cylinder is first retracted, after oil cylinder to be driven is retracted, the upper mold delay
Original state is retracted after a certain period of time and keeps certain distance with lower die, gives certain placement blank product space, so far punching, cut
While terminating, product is taken out.
8. punching method for cutting edge according to claim 7, it is characterised in that：The upper mold is downwards 1m/s extremely during trimming
The uniformly retarded motion of 0.1m/s.
9. punching method for cutting edge according to claim 8, it is characterised in that：The upper mold retracts original state after postponing 2 ~ 5s
And keep certain distance with lower die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610872267.9A CN106424674B (en) | 2016-09-29 | 2016-09-29 | A kind of hydraulic oil cylinder driving punching trimming mode structure and its punching method for cutting edge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610872267.9A CN106424674B (en) | 2016-09-29 | 2016-09-29 | A kind of hydraulic oil cylinder driving punching trimming mode structure and its punching method for cutting edge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106424674A CN106424674A (en) | 2017-02-22 |
| CN106424674B true CN106424674B (en) | 2018-05-15 |
Family
ID=58172832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610872267.9A Expired - Fee Related CN106424674B (en) | 2016-09-29 | 2016-09-29 | A kind of hydraulic oil cylinder driving punching trimming mode structure and its punching method for cutting edge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106424674B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107363246A (en) * | 2017-07-27 | 2017-11-21 | 成都市龙泉通惠实业有限责任公司 | A kind of vertical two pistons of processing cut overlap machine |
| CN108436054A (en) * | 2018-03-06 | 2018-08-24 | 广东鸿泰南通精机科技有限公司 | The process units of overflow cinder ladle and clout handle is removed in automation without edge of a knife punching type |
| CN110385414A (en) * | 2018-04-19 | 2019-10-29 | 昆山汉鼎精密金属有限公司 | Automatically remove slag turn-up mechanism |
| CN108687241B (en) * | 2018-07-19 | 2023-10-27 | 浙江跃进锻造有限公司 | Rocker arm trimming and punching correction composite die |
| CN109047737A (en) * | 2018-09-18 | 2018-12-21 | 广东万家乐燃气具有限公司 | A kind of die casting automatic trimming, deslagging, feeding-distribution device |
| CN112895341A (en) * | 2020-12-25 | 2021-06-04 | 广东文灿压铸股份有限公司 | Automatic stamping device capable of bidirectionally stamping slag removing bag |
| CN115042264A (en) * | 2022-04-15 | 2022-09-13 | 吉安奔达科技发展有限公司 | Automatic punching device for mud guard |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205074407U (en) * | 2015-06-24 | 2016-03-09 | 武汉理工大学 | Forming die of local grow degree drop stamping piece |
| CN205393329U (en) * | 2016-03-11 | 2016-07-27 | 北京京翰林模具制造有限公司 | Mould that forged aluminum alloy wheel hub reaming was cut edge and is punched a hole |
| CN205436984U (en) * | 2016-03-15 | 2016-08-10 | 洛阳华冠齿轮股份有限公司 | Gear side cut compound die that punches a hole |
| CN206200110U (en) * | 2016-09-29 | 2017-05-31 | 华南理工大学 | A kind of hydraulic oil cylinder driving punching trimming mode structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4646458B2 (en) * | 2001-07-26 | 2011-03-09 | パナソニック株式会社 | Apparatus and method for punching fine holes |
-
2016
- 2016-09-29 CN CN201610872267.9A patent/CN106424674B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205074407U (en) * | 2015-06-24 | 2016-03-09 | 武汉理工大学 | Forming die of local grow degree drop stamping piece |
| CN205393329U (en) * | 2016-03-11 | 2016-07-27 | 北京京翰林模具制造有限公司 | Mould that forged aluminum alloy wheel hub reaming was cut edge and is punched a hole |
| CN205436984U (en) * | 2016-03-15 | 2016-08-10 | 洛阳华冠齿轮股份有限公司 | Gear side cut compound die that punches a hole |
| CN206200110U (en) * | 2016-09-29 | 2017-05-31 | 华南理工大学 | A kind of hydraulic oil cylinder driving punching trimming mode structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106424674A (en) | 2017-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106424674B (en) | A kind of hydraulic oil cylinder driving punching trimming mode structure and its punching method for cutting edge | |
| CN105215771B (en) | Full-automatic lock core deburring equipment and debarring process | |
| CN209811011U (en) | Punching and blanking die with deburring function | |
| CN202715697U (en) | Die capable of removing burr of small holes | |
| CN205033001U (en) | Full -automatic lock core burring equipment and burring technology | |
| CN106735125B (en) | A kind of device for being used to remove the mouth of a river that LOGO throws lamp housing casting | |
| CN102729312B (en) | Pin removal demoulding apparatus for using after compression moulding of bamboo and wood integrated material | |
| CN209157060U (en) | A kind of middle-size and small-size, high-volume Steel Castings casting mould | |
| CN206200110U (en) | A kind of hydraulic oil cylinder driving punching trimming mode structure | |
| CN208894983U (en) | It is a kind of to bleed off pressure box cover die convenient for adjusting | |
| CN201309030Y (en) | Die for removing casting fins | |
| CN206344414U (en) | Automatic shearing mechanism in a kind of optical clear part gating pattern | |
| CN107030336A (en) | A kind of material head cutter device of die cast part | |
| CN206997943U (en) | A kind of material head cutter device of die cast part | |
| CN101890641A (en) | Batch processing method for porous filter cover plates | |
| CN203370976U (en) | Automatic flash pushing and removing device for workpiece trimming | |
| CN103567730A (en) | Dimension-reduction rapid prototyping process for rotary molding deep-cavity mold | |
| CN214293634U (en) | Mould-disassembly-free special-shaped silicon carbide brick mould capable of quickly forming brick | |
| CN214488744U (en) | Quick refrigerated casting mould | |
| CN107414499A (en) | A kind of spoke processing unit (plant) | |
| CN105598267A (en) | Stator coil shaping and cutting method and stator coil shaping and cutting all-in-one machine | |
| CN206838863U (en) | Quickly remove cast gate and deburring device | |
| CN206605020U (en) | Many runner die casting mold tools | |
| CN205767200U (en) | The most de-a kind of waste material device | |
| CN221604181U (en) | Mould for grinding wheel forming |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180515 Termination date: 20210929 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |