CN202894328U - Die and automatic molding press thereof - Google Patents
Die and automatic molding press thereof Download PDFInfo
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- CN202894328U CN202894328U CN 201220511033 CN201220511033U CN202894328U CN 202894328 U CN202894328 U CN 202894328U CN 201220511033 CN201220511033 CN 201220511033 CN 201220511033 U CN201220511033 U CN 201220511033U CN 202894328 U CN202894328 U CN 202894328U
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Abstract
The utility model discloses a molding die, which comprises a female die, a core rod, an upper inner stamping, an upper outer stamping, a lower inner stamping and a lower outer stamping, wherein the upper inner stamping is sleeved in the upper outer stamping, the upper outer stamping is sleeved on the upper portion of the inner wall of the female die, the lower inner stamping is sleeved in the lower outer stamping, the lower outer stamping is sleeved on the lower portion of the inner wall of the female die, the upper inner stamping, the upper outer stamping and the core rod form an upper step cavity of a die cavity, a ring cavity of the die cavity is formed between the female cavity and the core rod, and the lower inner stamping, the lower outer stamping and the core rod form a lower step cavity of the die cavity. The utility model further relates to an automatic molding press. The automatic molding press presses and forms a complex shape of product which is provided with two end surfaces on the upper and the lower directions through the unique automatic pressing die and a molding press. Compared with a traditional manual pressing mode, the die and the automatic molding press thereof have the advantages of high production efficiency and steady production quality and the like.
Description
Technical field
The utility model relates to a kind of mould, especially a kind of mould of powder metallurgy product, particularly a kind of automatic press-moulding die of powder metallurgy product.
The utility model also relates to a kind of automatic forming press that adopts above-mentioned mould.
Background technology
All the time, two step rings (11 that middle part as shown in Figure 2 has annular solid 12 structures and has outside projection at above-below direction, when 13) product of (cross section is annular) adopts powder metallurgy forming technique, all adopt manual mode compressing at hydraulic single column press.Mould structure as shown in Figure 1, the upper punch that is comprised of upper interior punching 1 and upper outwash 2, heelpiece 5, sleeve 4, undershoot 8, eliminator (3,6), two-way 7 and core bar 10 form up and down.The working face of upper Nei Chong, upper outwash, heelpiece, undershoot and core bar structure shaping mold cavity.Powder is packed in the die cavity, and the press power that press applies from top makes the mutual displacement of upper outwash and sleeve and heelpiece, and the powder in the die cavity is subject to the pressing pressure that transmits toward the bottom from top, and compressed closely knit one-tenth has the compacting semi-finished product 9 of definite shape and size.
But adopt manually compacting, production efficiency is low.And all has a complicated shape product of two protruding end faces for this type of above-below direction, in manual pressing process, the upper outside powder that sweeps away face directly is subject to pressing pressure, and mobile, in mobile, also be subject to opposite frictional force, so the annulus density at stampings middle part is best.After one-shot forming, remove again two-way, press applies press power to mould again from top, and this moment, undershoot can produce a displacement that makes progress by relative heelpiece, make the bottom step ring on undershoot top be subject to pressing pressure, so the step ring density of bottom was taken second place.Because the space that upper Nei Chong and upper outwash form is constant all the time, so it is less to enter the cemented carbide powder in the space that Nei Chong and upper outwash form, be in pressing process, mutually to push between powder to cause a small part to enter the space of Nei Chong and the formation of upper outwash, so other position of the relative stampings of density of stampings upper end step ring is far short of what is expected.And the good position of stampings density is little in the sintering after-contraction, sinter corresponding position size is larger, the position of stampings density contrast is shunk large, its sinter corresponding position size is less, so the interior hole dimension of the step ring of sinter upper end is little, the interior hole dimension of the annulus at middle part is large, has formed calabash shaped 14 as shown in Figure 3.In addition because step ring density and the middle part annulus density of upper surface differs greatly, and the part elastic after effect that stampings density is large is large, and the part elastic after effect that density is little is little, the as easy as rolling off a log formation crackle in step place of topping bar and encircling at stampings.
Summary of the invention
The utility model purpose is: for the problem of above-mentioned existence, the automatically mould of compacting of a kind of carbide alloy is provided, and the automatic forming press that adopts this mould, thereby enhance productivity greatly, and employing the utility model, in the time of can making the middle part for annular solid and have the hart metal product moulding of two step rings up and down, the even density at top and the bottom and middle part.
The mould that the utility model adopts, comprise upper punch, undershoot, former and core bar, upper punch, undershoot, former and core bar consist of die cavity, described upper punch comprises Nei Chong and upper outwash, punching is socketed in the outwash in upper, and upper outwash is socketed on the former upper inside wall, and described undershoot comprises lower inside punching and lower outwash, lower inside punching is socketed in the lower outwash, and lower outwash is socketed on former inwall bottom; Core bar is set in interior rush core hole and lower inside the punching in the core hole; Form die cavity between upper Nei Chong, upper outwash, former, lower inside punching, lower outwash, the core bar; Wherein go up the cavity of topping bar of Nei Chong, upper outwash, core bar formation die cavity, consist of the ring cavity of die cavity between former and the core bar, lower inside punching, lower outwash and core bar consist of the cavity of getting out of a predicament or an embarrassing situation of die cavity.
The upper punch of present mo(u)ldenpress all adopts single upper punch, the upper punch that namely is connected with the upper punch platen, if upper punch is made the step cavity of required form, will be the same with manual compacting when then suppressing, can't guarantee the density at product upper step position, and adopt the upper punch of upper Nei Chong and the combination of upper outwash, the cavity size that Nei Chong and upper outwash form on then can changing in pressing process, namely improve the compression ratio of powder compaction process, regulate the top bar density at position of stampings.The undershoot of lower inside punching and lower outwash combination by the relative displacement of upper Nei Chong and upper outwash, changes the density that product lower step position is regulated in the space of lower inside punching and lower outwash formation.This mould is used for automatic forming press, can realizes the mechanization moulding to complex product, regulate each position density of stampings, solve the crackle and the endoporus calabash shaped that cause owing to density unevenness, improve production efficiency and product quality.
Further improve and be: described upper Nei Chong, upper outwash, lower inside punching and lower outwash are cirque structure.The product of producing is two stepped ring forging products that the middle part has cirque structure and has outside projection at above-below direction.
Adopt the automatic forming press of the utility model mould to comprise successively from top to bottom the upper punch platen, the former platen, undershoot platen and stationary platen, base, upper punch platen, former platen, undershoot platen and base can move up and down; Be fixed into mould in the press, described mould comprises upper punch, undershoot, former and core bar, and former is fixed in the former platen, and core bar is fixed on the base; The upper punch platen of described press be connected precompressed carrier gas cylinder and piston rod, upper interior qi of chong channel ascending adversely cylinder and piston rod, upper outside qi of chong channel ascending adversely cylinder and piston rod; Be provided with in the upper outwash piston rod and keep supplying the interior hole that piston rod passes that rushes.
The upper punch of described mould comprises Nei Chong and upper outwash, and upper interior punching is socketed in the outwash; Punching is connected with the upper interior piston rod that rushes of upper punch platen in upper, and upper outwash and upper outwash piston rod are connected;
The undershoot of described mould comprises lower inside punching and lower outwash, and lower inside punching is socketed in the lower outwash, and lower outwash is socketed on former inwall bottom; Lower inside punching and fixed head are connected, and lower outwash and undershoot platen are connected;
Described core bar passes the lower inside core hole that rushes, and flushes with the former upper surface; Core bar and former, lower inside punching, lower outwash consist of the charging die cavity.
When upper punch pressed down, upper outwash was socketed on the former upper inside wall, consisted of shaping mold cavity between upper Nei Chong, upper outwash, former, lower inside punching, lower outwash, the core bar; Wherein go up the cavity of topping bar of Nei Chong, upper outwash, core bar formation die cavity, consist of the ring cavity of die cavity between former and the core bar, lower inside punching, lower outwash and core bar consist of the cavity of getting out of a predicament or an embarrassing situation of die cavity.
Mo(u)ldenpress of the present utility model, for improved mould, qi of chong channel ascending adversely cylinder parts and upper outside qi of chong channel ascending adversely cylinder parts on upper punch platen bottom has increased, make the upper Nei Chong that is connected with it and the upper outwash can single movement, and before compacting, form larger, the more powder of filling in the cavity, and in compacting, the reaction that powder produces under larger pressing pressure moves upper outside rushing to, and the step cavity is diminished, powder in the cavity is produced larger compression stress, the density at position but the compression ratio Effective Raise semi-finished product of increase are topped bar.
Further improve and be: arrange on the described fixed head and regulate the lower inside device of rushing in into the charging cavity depth; The undershoot platen arranges regulates the lower outside device of rushing in into the charging cavity depth; Arrange on the upper outwash piston rod and regulate the upper outside parts of rushing in into the charging cavity depth; Also comprise and regulate the top bar parts 36 of height of stampings.Above-mentioned adjusting position device can change the space size that upper Nei Chong and upper outwash form, and the space size of lower inside punching and the formation of lower outwash, thereby changes the density at corresponding product position.
In sum, owing to adopted technique scheme, the utility model is by unique automatic compacting tool and press, a kind of automatic briquetting process that the complicated shape product of two end faces is respectively arranged for above-below direction is provided, compare with traditional manual pressing mode, have the advantages such as production efficiency height, the quality of production be stable.
Description of drawings
The utility model will illustrate by embodiment and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is the manual forming die structure schematic diagram of existing product.
Fig. 2 is the half-finished structural representation of compacting.
Fig. 3 is the shape schematic diagram behind the semi-finished product sintering.
Fig. 4 is mould structure schematic diagram of the present utility model.
Fig. 5 is the structural representation of mo(u)ldenpress of the present utility model.
Fig. 6 is the structural representation after the utility model mould and the press assembling.
Fig. 7 is forming principle figure of the present utility model.
The specific embodiment
Disclosed all features in this specification, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
The utility model mould as shown in Figure 4 comprises former 17 and core bar 39, also comprises the upper punch that interior punching 15 and upper outwash 16 form, and upper interior punching is socketed in the outwash, and upper outwash is socketed on the former upper inside wall; Also comprise the undershoot that lower inside punching and lower outwash form, lower inside punching is socketed in the lower outwash, and lower outwash is socketed on former inwall bottom; Core bar is set in interior rush core hole and lower inside the punching in the core hole; Form die cavity between upper Nei Chong, upper outwash, former, lower inside punching, lower outwash, the core bar; Wherein go up the cavity of topping bar of Nei Chong, upper outwash, core bar formation die cavity, consist of the ring cavity of die cavity between former and the core bar, lower inside punching, lower outwash and core bar consist of the cavity of getting out of a predicament or an embarrassing situation of die cavity.
Such as Fig. 5,6, the utility model automatic forming press comprises upper punch platen 21 from top to bottom successively, former platen 24, undershoot platen 25 and stationary platen 28, base 30, and some fixedly guide pillars 26.In the pressing process, the undershoot platen maintains static, and hydraulic press drives upper punch platen, former platen, undershoot platen, 31 reciprocating motions of base connection platen.The upper punch platen top of press be connected hydraulic press compression leg 20 and precompressed carrier gas cylinder and piston rod (not shown), upper punch platen bottom be connected upper interior qi of chong channel ascending adversely cylinder and piston rod 22, upper outside qi of chong channel ascending adversely cylinder and piston rod 23; Upper outwash piston rod is loop configuration, and the upper interior piston rod that rushes can move up and down by upper outwash piston rod annular distance; Lower outside punching press limited block 27(processed is set between stationary platen and the undershoot platen, and it is Height Adjustable).The bottom of former platen is provided with lower outwash demoulding apparatus for adjusting position 35.
Arrange on the stationary platen and regulate the lower inside parts 38 of rushing in into the charging cavity depth, these parts can be an adjusting nut; Arrange on the undershoot platen and regulate the lower outside parts 29 of rushing in into the charging cavity depth; Regulate the top bar parts 36 of height of stampings; Arrange on the upper outwash piston rod and regulate the upper outside screw shell 37 of rushing in into the charging cavity depth, the screw shell lower end is connected with the lower outwash of annular.
With die assembly in mo(u)ldenpress, first with core bar 39 screw threads for fastening on base 30, then lower inside punching 19 is passed its lower end of core bar and is fastened on the stationary platen 28, more lower outwash 18 is socketed in outside the lower inside punching, the lower end of lower outwash is placed on the undershoot platen 25.Then former 17 is fastened in the former platen 24, the former lower inner wall is socketed in lower outwash outer wall, and the former upper surface flushes with the core bar upper surface.Again upper interior punching 15 is connected with upper interior qi of chong channel ascending adversely cylinder piston rod 22, at last upper outwash 16 is put into former 17, move sweeping away in upper, treat that outwash and upper interior punching rush in aligning and being enclosed within, and then move sweeping away in upper, until upper outwash is had an appointment about 20mm in former, regulate simultaneously the lower outside position of rushing in into former, regulate fastening lower outwash behind the position, on move upper punch, make outwash break away from former, move down again, make outwash again enter former, if can enter smoothly former, fastening upper outwash again just, on move the position that is flushed to charging.
Before the formal compacting, should carry out pressure testing.Crawl, pressing stroke is adjusted to " 50 " (table of drop-down adjusting device shows numerical value) position at pressing stroke or pull-down stroke, open the material boots, open former platen pause function, to expect that boots cover top, former hole, the assurance powder is fully filled the charging die cavity, observe upper outside rushing in into cavity depth, control the upper outside cavity depth of rushing between 5-10mm, adjust first the height that highly reaches pressing conditions, the adjusting device 29 of then adjusting under the undershoot platen is adjusted the annulus height of getting out of a predicament or an embarrassing situation, and then slowly adjust pressing stroke and change the stampings substance, make stampings satisfy the substance requirement of pressing conditions, the size in Nei Chong and upper outwash formation space changes the density at the annulus position of topping bar on the adjustment dress powder position, the size of adjusting the dress lower inside punching in powder position and lower outwash formation space changes the density at the annulus position of getting out of a predicament or an embarrassing situation, adjust the top and press the density of stroke alteration middle part annulus, make stampings top, the annulus density of middle part and bottom is close, and be of the required size, just can large quantities ofly suppress, if size does not meet technological requirement, just according to the product position, continue to adjust the size in upper Nei Chong and upper outwash formation space, lower inside punching and lower outwash form size and the top in space and press stroke, until each spot size of stampings meets in the processing range.Open prestrain, adjust prestrain angle and cylinder pressure, angle and the cylinder pressure of interior qi of chong channel ascending adversely cylinder Push And Release equal the prestrain cylinder pressure as far as possible in the adjustment, adjust angle and the cylinder pressure of upper outside qi of chong channel ascending adversely cylinder Push And Release, make it equal the prestrain cylinder pressure.By above-mentioned adjustment, the top pressure stage, can keep Nei Chong and upper outwash position motionless, eliminate the crackle between compacting middle part annulus and the top and the bottom stepped ring forging, finally obtain qualified stampings.And carry out batch and suppress.
The forming principle of mo(u)ldenpress is seen Fig. 7, and details are as follows for process:
A: charging (dress powder), with powder packed in the charging die cavity that former, core bar and undershoot consist of.
B: compression leg presses down the drive upper punch with the upper punch platen and presses down, described upper punch comprises Nei Chong and upper outwash, when pressing down, qi of chong channel ascending adversely cylinder and upper outside qi of chong channel ascending adversely cylinder are opened in upper, Nei Chong and upper outwash relatively move in the drive, and (rush to as above and move, upper outside sweeping away moved, and also can only be that upper outside sweeping away moved, or rush in upper move), make between Nei Chong and the upper outwash formation cavity of topping bar;
C: upper punch continues to press down, upper outside rushing in the former, and the upper interior core hole that rushes penetrates in the core bar; Top bar cavity by the powder packed in the die cavity of feeding;
D: upper punch, former, core bar press down synchronously, the pressing pressure that upper punch presses down (5MPa is arranged approximately) passes to lower outwash by powder, drive lower outwash and together be displaced downwardly to lower outside punching press limited block processed (figure), the reaction force that the interior powder opposing compacting distortion of die cavity this moment produces is applied to the upper outside pressure that rushes to (about 0.5 MPa) above upper outside qi of chong channel ascending adversely cylinder, upper outside rushing to moved, the cavity of topping bar that outwash and upper interior punching form on this moment diminishes, make the powder of filling in the cavity produce larger compression, density improves.Lower inside punching maintains static.
E: upper punch presses down separately again, and remaining part is motionless, improves middle part annulus density, and the powder in the charging die cavity is pressed into the middle part to have loop configuration and have two outwards stampings of the step ring of projection at above-below direction.
F: press on the top: the precompressed carrier gas cylinder is opened, and upper punch is applied pre-ballast power, by upper punch certain pressure is acted on the stampings, until the demoulding is finished, just changes upper punch precompressed carrier gas cylinder direction, can alleviate stampings elastic after effect rate of release; At this moment, former, core bar move down synchronously, and lower outwash and lower insidely rush motionlessly in demoulding step, realizes the two-way compacting to the ring of getting out of a predicament or an embarrassing situation.
G: former, core bar continue to move down, when arriving lower outwash demoulding position, lower outwash and former, core bar move down synchronously, to upper surface and the lower inside end face that rushes to of former, core bar, after stampings are deviate from former fully, the pre-ballast power of removal upper punch, the moving upper punch of belt is moved on rapidly on the compression leg, go up the cylinder startup of Nei Chong and upper outwash simultaneously, and upper interior punching relatively upper outside sweeping away moves, make outwash and upper in sweep away end face, be returned to steps A dress powder (charging) initial position.
H: former, core bar, lower outside punching are returned to steps A dress powder (charging) initial position.Not shown.
Press repeats above-mentioned steps, realizes continuously compacting.
Upper Nei Chong, upper outwash, lower inside punching and lower outwash, former can be preferably cirque structure in above-described embodiment.Powder is cemented carbide powder, and the product of production is two stepped ring forging hart metal products that the middle part has cirque structure and has outside projection at above-below direction.Because the adjustment of automatic drawing method of the present utility model each several part density during to formed product is flexible, in the selection of compound forming agent, can abandon rubber and select paraffin, thus the control of carbon amount when being conducive to the product sintering.
The utility model adopts the upper punch of Nei Chong and the combination of upper outwash, by changing the space size of upper Nei Chong and upper outwash formation, regulates the top bar density at position of stampings.The undershoot of lower inside punching and lower outwash combination by the relative displacement of upper Nei Chong and upper outwash, changes the density that product lower step position is regulated in the space of lower inside punching and lower outwash formation.This mould is used for automatic forming press, can realizes the mechanization moulding to complex product, regulate each position density of stampings, solve the crackle and the endoporus calabash shaped that cause owing to density unevenness, improve production efficiency and product quality.
Although according to preferred embodiment the utility model has been carried out example and description, the utility model is not limited to the aforesaid specific embodiment.Under not deviating from the situation of the present utility model of setting forth in claims, the utility model can expand to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (6)
1. mould, comprise upper punch, undershoot, former and core bar, upper punch, undershoot, former and core bar consist of die cavity, it is characterized in that: described upper punch comprises Nei Chong and upper outwash, punching is socketed in the outwash in upper, and upper outwash is socketed on the former upper inside wall, and described undershoot comprises lower inside punching and lower outwash, lower inside punching is socketed in the lower outwash, and lower outwash is socketed on former inwall bottom; Core bar is set in interior rush core hole and lower inside the punching in the core hole; Form die cavity between upper Nei Chong, upper outwash, former, lower inside punching, lower outwash, the core bar; Wherein go up the cavity of topping bar of Nei Chong, upper outwash, core bar formation die cavity, consist of the ring cavity of die cavity between former and the core bar, lower inside punching, lower outwash and core bar consist of the cavity of getting out of a predicament or an embarrassing situation of die cavity.
2. mould according to claim 1, it is characterized in that: described upper Nei Chong and upper outwash can be done relative displacement, change the cavity volume of topping bar.
3. mould according to claim 1, it is characterized in that: described lower inside punching and lower outwash can be done relative displacement, change the cavity volume of getting out of a predicament or an embarrassing situation.
4. mould according to claim 1, it is characterized in that: described upper Nei Chong, upper outwash, lower inside punching and lower outwash are cirque structure.
5. a mo(u)ldenpress comprises the upper punch platen from top to bottom successively, the former platen, and undershoot platen and stationary platen, base, upper punch platen, former platen, undershoot platen and base can move up and down; Be fixed into mould in the press, described mould comprises upper punch, undershoot, former and core bar, and former is fixed in the former platen, and core bar is fixed on the base; It is characterized in that:
The upper punch platen of described press be connected upper interior qi of chong channel ascending adversely cylinder and piston rod, upper outside qi of chong channel ascending adversely cylinder and piston rod; Be provided with in the upper outwash piston rod and keep supplying the interior hole that piston rod passes that rushes;
The upper punch of described mould comprises Nei Chong and upper outwash, and upper interior punching is socketed in the outwash; Punching is connected with the upper interior piston rod that rushes of upper punch platen in upper, and upper outwash and upper outwash piston rod are connected;
The undershoot of described mould comprises lower inside punching and lower outwash, and lower inside punching is socketed in the lower outwash, and lower outwash is socketed on former inwall bottom; Lower inside punching and fixed head are connected, and lower outwash and undershoot platen are connected;
Described core bar passes the lower inside core hole that rushes, and flushes with the former upper surface; Core bar and former, lower inside punching, lower outwash consist of the charging die cavity.
When upper punch pressed down, upper outwash was socketed on the former upper inside wall, consisted of shaping mold cavity between upper Nei Chong, upper outwash, former, lower inside punching, lower outwash, the core bar; Wherein go up the cavity of topping bar of Nei Chong, upper outwash, core bar formation die cavity, consist of the ring cavity of die cavity between former and the core bar, lower inside punching, lower outwash and core bar consist of the cavity of getting out of a predicament or an embarrassing situation of die cavity.
6. mo(u)ldenpress as claimed in claim 5 arranges on the described fixed head and regulates the lower inside device of rushing in into the charging cavity depth; The undershoot platen arranges regulates the lower outside device of rushing in into the charging cavity depth; Arrange on the upper outwash piston rod and regulate the upper outside parts of rushing in into the charging cavity depth; Also comprise and regulate the top bar parts of height of stampings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220511033 CN202894328U (en) | 2012-09-30 | 2012-09-30 | Die and automatic molding press thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220511033 CN202894328U (en) | 2012-09-30 | 2012-09-30 | Die and automatic molding press thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202894328U true CN202894328U (en) | 2013-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220511033 Expired - Lifetime CN202894328U (en) | 2012-09-30 | 2012-09-30 | Die and automatic molding press thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103706787A (en) * | 2012-09-30 | 2014-04-09 | 自贡硬质合金有限责任公司 | Die and automatic forming press and forming method thereof |
| CN106079549A (en) * | 2016-08-16 | 2016-11-09 | 合肥波林新材料股份有限公司 | A kind of compound mould |
| CN108393490A (en) * | 2018-01-29 | 2018-08-14 | 苏州莱特复合材料有限公司 | A kind of up-stroke device for solving control panel and being stained with punching |
| CN110125391A (en) * | 2019-05-13 | 2019-08-16 | 自贡硬质合金有限责任公司 | Die and method for manufacturing pressed blank with step |
| CN111438361A (en) * | 2020-04-30 | 2020-07-24 | 燕山大学 | Core rod follow-up discharge sintering die |
-
2012
- 2012-09-30 CN CN 201220511033 patent/CN202894328U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103706787A (en) * | 2012-09-30 | 2014-04-09 | 自贡硬质合金有限责任公司 | Die and automatic forming press and forming method thereof |
| CN103706787B (en) * | 2012-09-30 | 2017-02-15 | 自贡硬质合金有限责任公司 | Die and automatic forming press and forming method thereof |
| CN106079549A (en) * | 2016-08-16 | 2016-11-09 | 合肥波林新材料股份有限公司 | A kind of compound mould |
| CN106079549B (en) * | 2016-08-16 | 2017-10-03 | 合肥波林新材料股份有限公司 | A kind of compound mould |
| CN108393490A (en) * | 2018-01-29 | 2018-08-14 | 苏州莱特复合材料有限公司 | A kind of up-stroke device for solving control panel and being stained with punching |
| CN110125391A (en) * | 2019-05-13 | 2019-08-16 | 自贡硬质合金有限责任公司 | Die and method for manufacturing pressed blank with step |
| CN111438361A (en) * | 2020-04-30 | 2020-07-24 | 燕山大学 | Core rod follow-up discharge sintering die |
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