CN109092976A - A kind of cavity plate for sheet stamping - Google Patents
A kind of cavity plate for sheet stamping Download PDFInfo
- Publication number
- CN109092976A CN109092976A CN201811127777.9A CN201811127777A CN109092976A CN 109092976 A CN109092976 A CN 109092976A CN 201811127777 A CN201811127777 A CN 201811127777A CN 109092976 A CN109092976 A CN 109092976A
- Authority
- CN
- China
- Prior art keywords
- cavity plate
- hole
- annular groove
- punching
- formed punch
- 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.)
- Granted
Links
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
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/14—Dies
-
- 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
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
Abstract
The invention proposes a kind of cavity plates for sheet stamping, formed punch, cavity plate are easy the defect of tipping damage when for overcoming high speed blanking thin sheet material, the cavity plate has a punching through-hole, wherein, the annular groove of an axis direction perpendicular to the punching through-hole, the annular groove are formed with around the inner surface of the punching through-hole) it is located above the stroke minimum point of formed punch.Cavity plate for sheet stamping of the invention, the inner surface for being punched through-hole is designed into the structure with annular groove, portion of air can be retained in annular groove, destroy the negative pressure state in punching through-hole, it effectively prevents waste material and is brought again into cavity plate, to avoiding stuck the destructions formed punch of waste material and cavity plate, effectively prevention is brought back tipping phenomenon caused by working face because of waste material absorption formed punch, avoids formed punch resulting from, cavity plate tipping damages.
Description
Technical field
It can be used for thin plate high speed stamping the present invention relates to a kind of mold that can be used for high speed stamping field, especially one kind to add
The cavity plate of work.
Background technique
In Modern Mold production, for the demand for meeting stamping parts, realized often through drawing velocity is improved.And
When thin plate class high speed stamping is processed, formed punch breakage phenomenon frequent occurrence.Sometimes the waste material swept away appears in press work face,
Piece surface is caused to scratch.These situations not only mold damage but also seriously affect ram efficiency and part yield.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of cavity plates for sheet stamping, front institute is reduced or avoided
The problem of mentioning.
Specifically, described to be used for sheet stamping the present invention provides a kind of improved cavity plate for sheet stamping
Formed punch, cavity plate are easy the defect of tipping damage when cavity plate can effectively overcome high speed blanking thin sheet material.
In order to solve the above technical problems, the invention proposes a kind of cavity plates for sheet stamping, for overcoming high-speed punching
Formed punch, cavity plate are easy the defect of tipping damage when cutting out thin sheet material, and the cavity plate has a punching through-hole, wherein surrounds
The inner surface of the punching through-hole is formed with the annular groove of an axis direction perpendicular to the punching through-hole, the annular
Groove) it is located above the stroke minimum point of formed punch.
Preferably, the punching through-hole inner surface is the downward widened conical surface.
Preferably, it is described punching through-hole inner surface the conical surface taper be 2-5 degree, preferably 3 degree or so.
Preferably, the width a of the annular groove is 0.2~1.0mm.
Preferably, the mean depth b of the annular groove is 0.2~1.0mm.
Preferably, the height h of upper end cutting edge of the top of the annular groove apart from the cavity plate is 2-5mm.
Preferably, the cavity plate is in circular ring shape, and outer surface is the downward widened conical surface.
Preferably, the taper of the conical surface of the outer surface of the cavity plate be 1-5 degree, preferably 2 degree or so.
Preferably, the cavity plate is removably disposed in the hole of a pedestal.
The above-mentioned cavity plate for sheet stamping of the invention, the inner surface for being punched through-hole is designed into annular groove
Structure can retain portion of air in annular groove, destroy the negative pressure state in punching through-hole, effectively prevent waste material quilt
Again cavity plate is brought into, to avoid the stuck destruction formed punch of waste material and cavity plate, effectively prevention is brought back work because waste material adsorbs formed punch
Tipping phenomenon caused by face avoids formed punch resulting from, the damage of cavity plate tipping.
Detailed description of the invention
The following drawings are only intended to schematically illustrate and explain the present invention, not delimit the scope of the invention.Wherein,
The schematic cross-sectional view that light sheet material is punched by stamping die is shown in Fig. 1；
The cross-sectional view of the cavity plate for sheet stamping of a specific embodiment according to the present invention is shown in Fig. 2；
The cross-sectional view of the cavity plate for sheet stamping of another specific embodiment according to the present invention is shown in Fig. 3.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, this hair of Detailed description of the invention is now compareed
Bright specific embodiment.Wherein, identical component uses identical label.
As described in background, when thin plate class high speed stamping is processed, formed punch breakage phenomenon frequent occurrence.And it is this existing
As but seldom occurring in usual speed punch process.Statistics discovery, 500-800 beats/min of high speed stamping sheet parts
When, the formed punch formed punch of the probability of generation when being less than 200 beats/min of the same part of usual speed punching press that fractures fractures
10-20 times of probability of happening, this is clearly extremely odd phenomenon.By checking mold, formed punch Breaking Accident, The Reason is searched, is checked punching
Head and non-blade port part tipping；And general service wear is unlikely to cause to be broken；It is answered if it is formed punch material and in being heat-treated
Can only be accidental scene caused by power, but when high speed blanking, especially ironing plate light and small part when, in work a period of time
After occur as soon as formed punch fracture, the phenomenon that cutting edge of die tipping.Obviously this and improper mold are lost, but the formed punch in punching
Certain foreign matter is hit, is generated caused by huge drag.
Through analyze foreign matter generation, be not by mold material falls back or part blank defect cause, applicant
Judge that this is likely due to caused by the waste material that formed punch is swept away returns stamped area, but the waste material that punching removes why
Gravity can be overcome to return to stamped area? by comparison, applicant eliminate material magnetization factor (light sheet material be aluminium close
Gold, it is impossible to generate magnetic), also eliminating the factor of frictional static suction, (aluminium alloy is good conductor, can not be gathered enough quiet
Electricity generates the suction for being enough to overcome waste material gravity), last applicant accidentally judges that being likely due to aerodynamics factor makes
At, this is clearly non-obvious, is unexpected for a person skilled in the art.
As shown in Figure 1, the schematic cross-sectional view for being punched light sheet material by stamping die is shown in it, as schemed institute
Show, in high speed blanking, formed punch 1 contacts and then be downwardly into cavity plate 3 with light sheet material 2, sweeps away waste material 4 and forms a hole
5, during formed punch 1 declines, the edge of the hole 5 of 1 surface of formed punch and light sheet material 2 is in close contact, due to drawing velocity
The edge slot very little of (up to 500-800 beats/min) quickly, 1 surface of formed punch and hole 5 also has little time to suck from top enough
Air, and what the air in cavity plate 3 was inherently rapidly discharged under being pressed against of formed punch 1 and waste material 4, therefore in high-speed punching
When pressure, 6 moment of region that formed punch 1 can be made to enter 5 lower section of hole forms negative pressure state.
Therefore when waste material 4 is made of the aluminium alloy sheet of low-density and when small volume in itself, its own very light in weight,
To when formed punch 1 returns to upward (drawing velocity quickly, the speed that formed punch returns down and then up quickly, almost
The conversion process that moment completes), waste material 4 can be adsorbed on the bottom surface of formed punch 1 with formed punch 1 together under the action of above-mentioned negative pressure
It moves upwards.
When formed punch 1 is upwardly separated from hole 5, negative pressure state is eliminated, and waste material 4 can block (hole by the edge of hole 5
5 edge always can some deformations of extending so that waste material 4 can be slightly larger than the area of hole 5) and fall at random into cavity plate 3.This
When light sheet material 2 be moved to new position, formed punch 1 sweeps away downwards new waste material again and enters cavity plate 3, the bottom of formed punch 1 with
And new waste material can be collided with the waste material 4 in falling, and in most cases waste material 4 can be gone out cavity plate 3, but it is also possible that meeting
Waste material 4 is expressed to stuck destruction formed punch 1 and cavity plate 3 or waste material 4 in the edge slot of formed punch 1 and cavity plate 3 together with multiple
New waste material is sucked up together in the edge slot for being then easier to be stuck in first 1 and cavity plate 3 upwards, therefore is rushed in continuous high speed
After pressing a period of time, formed punch, the damage of cavity plate tipping will soon be caused.
By it is above-mentioned it is non-obvious, have now surprisingly been found that, formed punch when for high speed blanking light sheet material, cavity plate hold
The problem of easy tipping damage, the present invention provides a kind of improved cavity plates for sheet stamping.As shown in Fig. 2, its display
It is the cross-sectional view of the cavity plate for sheet stamping of a specific embodiment according to the present invention, wherein of the invention being used for is thin
Formed punch, cavity plate are easy the defect of tipping damage when the cavity plate 3 of plate punching press can be used for overcoming high speed blanking thin sheet material, described recessed
Mould 3 have a punching through-hole 31, with Fig. 1 cavity plate the difference is that, in the present embodiment, around be punched through-hole 31 inner surface
It is formed with the annular groove 32 of an axis direction perpendicular to punching through-hole 31, annular groove 32 is located at the stroke of formed punch 1 most
Above low spot.
It is recessed to be designed into band annular by the above-mentioned cavity plate 3 for sheet stamping of the invention for the inner surface for being punched through-hole 31
The structure of slot 32, its advantage is that formed punch 1 and waste material 4 will be punched the air in through-hole 31 when formed punch 1 sweeps away thin sheet material 2
Downwards discharge, but annular groove 32 perpendicular to punching through-hole 31 axis direction, that is, perpendicular to punching through-hole 31 in
Air-flow discharge direction, thus portion of air can be retained in annular groove 32, it is logical that the air that this part is retained destroys punching
Negative pressure state in hole 31, (in annular groove 32 when formed punch 1 travels downward through annular groove 32 with waste material 4
Top still has negative pressure), the air in annular groove 32 can instantaneously enter the contact surface between formed punch 1 and waste material 4, release
Negative pressure state, when formed punch 1 returns up movement, waste material 4 will not be sucked by formed punch 1 and move upwards, to effectively prevent giving up
Material 4 is brought again into cavity plate 3, to avoid the stuck destruction formed punch 1 of waste material 4 and cavity plate 3, effectively prevention is because of waste material absorption formed punch quilt
Tipping phenomenon caused by working face is taken back, formed punch resulting from, the damage of cavity plate tipping are avoided.
In addition, due to the presence of annular groove 32, so that being additionally provided one perpendicular to axis side in punching through-hole 31
To extending space, thus when waste material 4 is by annular groove 32, the state (as shown in Figure 1) of 4 Pressing Deformation of waste material can be with
Sufficiently reply straightened condition (as shown in Figure 2), further avoid irregular form waste material 4 it is stuck formed punch 1 and cavity plate 3 it
Between gap in, improve the service life of mold.
In a further advantageous embodiment, as shown in Fig. 2, the inner surface of punching through-hole 31 is designed as downward widened cone
Face.The cutting edge of this widened conical surface form downwards, the waste material or part of punching can directly be fallen from punching through-hole 31, and
It is more bigger down to be punched through-hole 31, is not easy to accumulate material in through-hole, it is also small that small suffered pressure is worn in aperture, especially suitable for this
The high speed blanking of invention.Further, in a preferred embodiment, the cone of the conical surface of punching 31 inner surface of through-hole
Degree is 2-5 degree, and preferably 3 degree or so, which is easier to blanking when high speed blanking.
In addition, in order to effectively destroy negative pressure state, the relative dimensions parameter of annular groove 32 be also it is critically important, it is optimal
Under scheme, optimal air retention effect should be obtained with processing capacity small as far as possible to be advisable, and can both obtain the effect for destroying negative pressure
Fruit can also save processing cost.For instance, it is preferred that the width a of the annular groove 32 is 0.2~1.0mm.At another
In preferred embodiment, the mean depth b of the annular groove 32 is 0.2~1.0mm, in where the setting of annular groove 32
Side be it is inclined, depth of the annular groove 32 on medial surface is not all identical, thus preferred depth should be defined as putting down
Equal depth is advisable.
Furthermore the position where annular groove 32 is also the ring for needing optimal setting, i.e. annular groove 32 will not only be set
It sets in the stroke range of formed punch 1, and more on the lower in view of 1 stroke of formed punch, the negative pressure of formation is bigger, needs more air
Negative pressure state could be destroyed completely, and therefore, in a further advantageous embodiment, the top of annular groove 32 is apart from the cavity plate
The height h of 3 upper end cutting edge is 2-5mm.
In order to preferably prevent that crackle and stress are concentrated, the annular groove 32 intersects with the punching through-hole 31
Corner (301,302) can be arc transition angle at upper and lower two, for example, it may be being processed as the arc transition that radius is 0.1mm
Angle.
The cross-sectional view of the cavity plate for sheet stamping of another specific embodiment according to the present invention is shown in Fig. 3,
Wherein, the internal structure of the cavity plate 3 in Fig. 3 is identical with Fig. 2, the difference is that, the design of cavity plate 3 of the present embodiment is in
Circular ring shape, outer surface are the downward widened conical surface.The advantages of this design is that cavity plate 3 has been designed to modular structure,
It only needs to replace the female mold part of circular ring shape after cutting edge of die abrasion, part size can be effectively ensured.In addition, it
So being to realize the quick-replaceable after cutting edge of die abrasion, the i.e. conical surface using the outer surface of downward widened conical surface form
The cavity plate module of form can be removably arranged in the hole of a pedestal 10, can be easily from pedestal 10 after damage
In remove, it is stuck in the hole of pedestal 10 that conical surface form can avoid cavity plate from deforming, and has saved the take-down time.On the other hand, it adopts
With the cavity die structure of Fig. 3 form, and exist with the punching through-hole 31 of conical surface form certain associated, that is, previous embodiment
In, the taper for being punched the conical surface of 31 inner surface of through-hole is 2-5 degree, and preferably 3 degree or so, although which is easier to
Blanking when high speed blanking, but the angular range is but compared to angle (one used by certain cavity plates for sheet stamping
As for cylinder there is no a taper, the taper that tolerance is formed is generally less than 0.5 degree) it is much bigger, in the case where high-volume high-speed production,
The cutting edge of die rate of wear is fast, therefore, in a preferred embodiment of the invention, will be in the outer surface of the cavity plate 3 of circular ring shape
The conical surface taper design be 1-5 degree, preferably 2 degree or sos, in this way dismount all than common cylinder facilitate and reliably, improve
Production efficiency.
In conclusion the cavity plate for sheet stamping of the invention, which passes through, is designed into band for the inner surface for being punched through-hole
The structure of connected in star can retain portion of air in annular groove, destroy the negative pressure state in punching through-hole, effectively prevent
Waste material is brought again into cavity plate, to avoid the stuck destruction formed punch of waste material and cavity plate, effectively prevention adsorbs formed punch quilt because of waste material
Tipping phenomenon caused by working face is taken back, formed punch resulting from, the damage of cavity plate tipping are avoided.
It will be appreciated by those skilled in the art that although the present invention is described in the way of multiple embodiments,
It is that not each embodiment only contains an independent technical solution.So narration is used for the purpose of for the sake of understanding in specification,
The skilled in the art should refer to the specification as a whole is understood, and by technical solution involved in each embodiment
Regard as and can be combined with each other into the modes of different embodiments to understand protection scope of the present invention.
The foregoing is merely the schematical specific embodiment of the present invention, the range being not intended to limit the invention.It is any
Those skilled in the art, made equivalent variations, modification and combination under the premise of not departing from design and the principle of the present invention,
It should belong to the scope of protection of the invention.
Claims (7)
1. a kind of cavity plate for sheet stamping, formed punch, cavity plate are easy tipping damage when for overcoming high speed blanking thin sheet material
Bad defect, the cavity plate (3) have a punching through-hole (31), which is characterized in that around the interior of punching through-hole (31)
Surface is formed with the annular groove (32) of an axis direction perpendicular to punching through-hole (31), the annular groove (32)
Above the stroke minimum point of formed punch (1), punching through-hole (31) inner surface is the downward widened conical surface, the cavity plate
It (3) is in circular ring shape, outer surface is the downward widened conical surface, and the annular groove (32) is intersected with punching through-hole (31)
Corner (301,302) are arc transition angle at upper and lower two.
2. being used for the cavity plate of sheet stamping as described in claim 1, which is characterized in that the width a of the annular groove (32)
For 0.2~1.0mm.
3. being used for the cavity plate of sheet stamping as described in claim 1, which is characterized in that the average depth of the annular groove (32)
Degree b is 0.2~1.0mm.
4. being used for the cavity plate of sheet stamping as described in claim 1, which is characterized in that the top of the annular groove (32)
The height h of upper end cutting edge apart from the cavity plate (3) is 2-5mm.
5. being used for the cavity plate of sheet stamping as described in claim 1, which is characterized in that the cavity plate (3) is removably disposed
In the hole of a pedestal (10).
6. being used for the cavity plate of sheet stamping as described in claim 1, which is characterized in that the outer surface of the cavity plate (3)
The conical surface taper be 1-5 degree.
7. being used for the cavity plate of sheet stamping as claimed in claim 6, which is characterized in that the outer surface of the cavity plate (3)
The conical surface taper be 2 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811127777.9A CN109092976B (en) | 2016-06-28 | 2016-06-28 | Female die for stamping thin plate |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610479542.0A CN105921595B (en) | 2016-06-28 | 2016-06-28 | A kind of high speed stamping cavity plate |
| CN201811127777.9A CN109092976B (en) | 2016-06-28 | 2016-06-28 | Female die for stamping thin plate |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610479542.0A Division CN105921595B (en) | 2016-06-28 | 2016-06-28 | A kind of high speed stamping cavity plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109092976A true CN109092976A (en) | 2018-12-28 |
| CN109092976B CN109092976B (en) | 2021-01-01 |
Family
ID=56829217
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811127717.7A Active CN109108151B (en) | 2016-06-28 | 2016-06-28 | Female die for high-speed stamping of thin plate |
| CN201811127777.9A Active CN109092976B (en) | 2016-06-28 | 2016-06-28 | Female die for stamping thin plate |
| CN201610479542.0A Active CN105921595B (en) | 2016-06-28 | 2016-06-28 | A kind of high speed stamping cavity plate |
| CN201811127779.8A Active CN109108152B (en) | 2016-06-28 | 2016-06-28 | Female die for high-speed stamping |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811127717.7A Active CN109108151B (en) | 2016-06-28 | 2016-06-28 | Female die for high-speed stamping of thin plate |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610479542.0A Active CN105921595B (en) | 2016-06-28 | 2016-06-28 | A kind of high speed stamping cavity plate |
| CN201811127779.8A Active CN109108152B (en) | 2016-06-28 | 2016-06-28 | Female die for high-speed stamping |
Country Status (1)
| Country | Link |
|---|---|
| CN (4) | CN109108151B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6810265B2 (en) * | 2017-06-28 | 2021-01-06 | 貴嗣 飯塚 | Cutting method of metal plate, manufacturing method of metal molded body and metal molded body |
| CN111940662B (en) * | 2020-07-01 | 2022-07-05 | 湖北三环锻造有限公司 | Remanufacturing method of forging trimming die |
| CN113134522A (en) * | 2021-04-20 | 2021-07-20 | 湖南泰嘉新材料科技股份有限公司 | Method and system for identifying weld seams and/or defects in steel strip used to produce saw blades |
| CN113231532A (en) * | 2021-06-09 | 2021-08-10 | 东风柳州汽车有限公司 | Stamping and slitting method and stamping die |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN105921595B (en) | 2018-11-13 |
| CN109092976B (en) | 2021-01-01 |
| CN109108151A (en) | 2019-01-01 |
| CN109108152B (en) | 2020-12-01 |
| CN109108152A (en) | 2019-01-01 |
| CN105921595A (en) | 2016-09-07 |
| CN109108151B (en) | 2020-12-01 |
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Inventor after: He Wangjun Inventor after: Su Bo Inventor after: Ling Changyue Inventor after: Zou Jiebo Inventor after: Chen Bin Inventor after: Jin Qiqi Inventor after: Nie Huiping Inventor after: Tang Xiongjiang Inventor before: He Wangjun |
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