CN220093045U - Powder blank forming die - Google Patents
Powder blank forming die Download PDFInfo
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- CN220093045U CN220093045U CN202321591103.0U CN202321591103U CN220093045U CN 220093045 U CN220093045 U CN 220093045U CN 202321591103 U CN202321591103 U CN 202321591103U CN 220093045 U CN220093045 U CN 220093045U
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- die
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- inserts
- female mold
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- 239000000843 powder Substances 0.000 title claims abstract description 42
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 150000001875 compounds Chemical class 0.000 claims description 2
- 238000005299 abrasion Methods 0.000 abstract description 4
- 238000005336 cracking Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004663 powder metallurgy Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
Abstract
The utility model relates to a powder blank forming die, which comprises an upper die, a lower die and a female die, wherein the female die comprises a female die sleeve, and a plurality of guide grooves are formed in the inner peripheral surface of the female die sleeve; a plurality of female mold inserts corresponding to the guide grooves, wherein each female mold insert is arranged in the corresponding guide groove in a sliding manner; the female die comprises a plurality of ejector rods corresponding to female die inserts and a plurality of guide rail seats corresponding to the ejector rods, wherein one end of each ejector rod is connected with the corresponding female die insert, and the other end of each ejector rod is arranged in the corresponding guide rail seat in a sliding manner. According to the powder blank forming die, through the sliding fit of the female die inserts and the guide grooves, when the die is removed, the female die inserts are separated from each other along the circumferential direction, and the powder blank is radially separated from the female die inserts, so that the die removing force is eliminated, the powder blank is directly ejected out of the female die subsequently, the abrasion loss of the die is reduced, the service life of the die is prolonged, and the phenomenon of cracking of the powder blank caused by overlarge or uneven die removing force is avoided.
Description
Technical Field
The utility model relates to the technical field of powder metallurgy, in particular to a powder blank forming die.
Background
The preparation method of large-scale powder metallurgy products, such as ceramic reinforced aluminum matrix composite brake discs for rail transit, generally comprises the steps of placing powder raw materials into a forming die, pressing the powder raw materials into powder cakes under high pressure, and then sintering and shaping the powder cakes. However, in actual production, the fact that the ceramic content in the powder raw material is high shows that the existing forming die has serious abrasion after being pressed for hundreds of times, and the inverted buckle generated by the concave abrasion position can lead to the product not to deviate from or the demolding force is doubled, so that the product is cracked. Therefore, the forming die needs to be maintained or replaced in time once worn, which can increase equipment cost and reduce production efficiency.
In addition, because the ceramic content in the powder raw material is higher, the press forming can be realized only by providing larger pressure during forming, the existing demoulding mode can be taken off only by larger demoulding force, and the powder blank is cracked due to the overlarge demoulding force or uneven demoulding force, so that the ultrasonic permeation of the shaped product is disqualified.
Disclosure of Invention
Based on this, it is necessary to provide a powder compact forming die which does not require a large demolding force and has a long service life.
The utility model provides a powder blank forming die, includes mould, lower mould and female die, after the compound die, upper mould and lower mould enclose and close and form the die cavity in the female die, the female die includes:
the female die sleeve is provided with a plurality of guide grooves on the inner peripheral surface;
the female mold inserts are corresponding to the guide grooves, and each female mold insert is slidably arranged in the corresponding guide groove;
the female mold inserts are arranged on the guide rail seats, and the female mold inserts are arranged on the guide rail seats;
in the press forming state, each female die insert is embedded in the corresponding guide groove, and the female die inserts are connected with each other along the circumferential direction to form a cavity wall;
in the demoulded state, each female mold insert slides at least partially out of the corresponding guide groove, the female mold inserts are separated from each other in the circumferential direction, and the powder blank is separated from the female mold inserts in the radial direction.
In one embodiment, each guide groove is tapered in the axial direction, and the taper is 1-20 degrees.
In one embodiment, each of the female inserts includes an integrally formed circumferential connection portion and T-shaped insert portion; in the press-formed state, the circumferential connecting portions of the female mold inserts are connected to each other to form the cavity wall; in the release state, the circumferential connections of the individual female mold inserts are separated from one another.
In one embodiment, each female mold insert further comprises a hanging table covering the top surfaces of the circumferential connecting portion and the T-shaped insert portion, and each guide groove is provided with a groove wall matched with the hanging table.
In one embodiment, there are 4 to 12 female mold inserts.
In one embodiment, each guide rail seat is provided with a first guide rail and a second guide rail which are communicated with each other, and the second guide rail is arranged in a deflection manner relative to the first guide rail; in the press forming state, each ejector rod relatively slides in the first guide rail of the corresponding guide rail seat; in the demolding state, the ejector rods slide relatively in the second guide rail of the corresponding guide rail seat.
In one embodiment, each guide rail seat is further provided with a third guide rail communicated with the second guide rail, and the third guide rail is arranged in a deflection manner relative to the second guide rail; and when each ejector rod slides in the third guide rail of the corresponding guide rail seat, the powder blank is ejected out of the female die.
In one embodiment, the powder blank forming die further comprises a lower die oil cylinder, wherein the lower die oil cylinder is respectively connected with the lower die and the guide rail seat and is used for driving the lower die and the guide rail seat to synchronously move.
In one embodiment, the compact forming die further comprises a stem assembly connected to the lower die cylinder.
In one embodiment, the stem assembly comprises a stem cylinder and a stem connected with the stem cylinder, an axial channel is arranged at the center of the lower die, and the stem is driven by the stem cylinder to axially move in the axial channel.
According to the powder blank forming die, through the sliding fit of the female die inserts and the guide grooves, when the die is removed, the female die inserts are separated from each other along the circumferential direction, and the powder blank is radially separated from the female die inserts, so that the die removing force is eliminated, the powder blank is directly ejected out of the female die subsequently, the abrasion loss of the die is reduced, the service life of the die is prolonged, and the phenomenon of cracking of the powder blank caused by overlarge or uneven die removing force is avoided.
Drawings
FIG. 1 is a schematic view of a powder blank forming die according to an embodiment;
FIG. 2 is a schematic view showing the assembly of the female mold insert and the female mold sleeve in a press-formed state;
FIG. 3 is a schematic structural view of a female mold insert according to an embodiment;
FIG. 4 is a schematic view of a guide rail seat according to an embodiment;
FIG. 5 is a schematic view showing a press-formed state according to an embodiment;
FIG. 6 is a schematic diagram of a demolding state of an embodiment;
fig. 7 is a schematic diagram illustrating an ejection state according to an embodiment.
Detailed Description
The present utility model will be described more fully hereinafter in order to facilitate an understanding of the present utility model, and preferred embodiments of the present utility model are set forth. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
Referring to fig. 1, a powder blank forming mold 10 according to an embodiment includes an upper mold 110, a lower mold 120, and a female mold 130, wherein after the mold is closed, the upper mold 110 and the lower mold 120 enclose a cavity in the female mold 130.
Wherein, the female die 130 comprises a female die sleeve 132, and the inner peripheral surface of the female die is provided with a plurality of guide grooves (not shown); a plurality of female mold inserts 134 corresponding to the guide grooves; a plurality of ejector pins 136 corresponding to the female mold insert 134; a plurality of guide rail seats 138 corresponding to the push rods 136.
Specifically, each female mold insert 134 is slidably disposed in a corresponding guide slot, and one end of each ejector pin 136 is connected to the corresponding female mold insert 134, and the other end is slidably disposed in a corresponding guide rail seat 138. That is, a push rod 136 is slidably disposed in one guide seat 138, the other end of the push rod 136 is connected to a corresponding female mold insert 134, and the female mold insert 134 is slidably disposed in a corresponding guide groove.
In the press-formed state, each female mold insert 134 is fitted into a corresponding guide groove of the female mold sleeve 132, and the female mold inserts 134 are connected to each other in the circumferential direction to form a cavity wall (as shown in fig. 2), i.e., a cavity wall of the above-mentioned cavity, for forming the outer contour of the powder compact.
In the demolded state, each of the die inserts 134 slides at least partially out of the corresponding guide slot, and the die inserts 134 are circumferentially separated from one another, with the powder compact radially separated from the die inserts 134, eliminating the demolding force, facilitating subsequent ejection of the powder compact out of the die 130.
In the present embodiment, each guide groove is tapered in the axial direction. Preferably, the taper is 1 to 20.
Through setting up the guide way that is certain tapering, even the mould produces the back-off because of wearing and tearing appear in long-time use, also can realize smooth drawing of patterns, further extension mould's life improves production efficiency.
Referring to fig. 3, each female mold insert 134 includes a circumferential connection portion 1342, a T-shaped insert portion 1344, and a hanging stand 1346. Wherein, the circumferential connection portion 1342 and the T-shaped embedded portion 1344 are integrally formed, and the hanging stand 1346 may cover the top surfaces of the circumferential connection portion 1342 and the T-shaped embedded portion 1344 by integrally forming or mechanically connecting. In the present embodiment, the hanging table 1346 covers the top surfaces of the circumferential connection portion 1342 and the T-shaped insert portion 1344 by means of bolting for easy replacement.
It will be appreciated that after the female mold insert 134 is inserted into the guide slot, the portion of the hooking portion 1346 beyond the T-shaped insertion portion 1344 just abuts against the wall of the guide slot that matches the guide slot, thereby preventing the problems of inconsistent height and powder entering the guide slot after assembly of each female mold insert.
Further, the number of female mold inserts is 4 to 12. Further, the number of female mold inserts is 5 to 8.
Referring to fig. 4, each guide rail seat 138 is provided with a first guide rail 1382, a second guide rail 1384 and a third guide rail 1386 which are sequentially communicated, wherein the second guide rail 1384 is biased towards the first guide rail 1382, and the third guide rail 1386 is biased towards the second guide rail 1384.
In the present embodiment, the first rail 1382 is provided in a direction parallel to the axial direction; the deflection angle of the second guide 1384 is 0-70 degrees, i.e. the included angle between the second guide 1384 and the horizontal direction is 0-70 degrees; the third rail 1384 is disposed in a direction parallel to the axial direction.
In the press-formed state, each jack 136 slides relatively within the first rail 1382 of the corresponding rail seat 138.
In the released state, each ram 136 slides relatively within the corresponding second rail 1384 of the rail seat 138.
In this embodiment, the powder blank forming mold 10 further includes a lower mold cylinder (not shown), where the lower mold cylinder is connected to the lower mold 120 and the rail seat 138, respectively, for driving the lower mold 120 and the rail seat 138 to move synchronously.
In operation of the powder compact forming die 10, the upper die 110 descends to provide a pressing force from top to bottom, the lower die 120 ascends to provide a pressing force from bottom to top, the lower die cylinder drives the lower die 120 and the guide rail seat 138 to ascend synchronously until the ejector rod 136 in the guide rail seat 138 moves relatively to the end of the first guide rail 1382 (as shown in fig. 5), during this process, each female die insert 134 is embedded in a corresponding guide groove to remain stationary, and each circumferential connecting portion 1342 is connected to each other to form a cavity wall to provide a pressing force from outside to inside.
After pressing, the upper die 110 is raised to disengage the female die 130, and the lower die 120 and rail seat 138 continue to be raised synchronously until the ram 136 moves relatively to the end of the second rail 1384 (as shown in fig. 6), during which the female die inserts 134 are raised under the reaction force of the ram and circumferentially separated from each other, and the preform and female die insert are no longer in contact, due to the biasing of the second rail 1384.
The lower die 120 and rail seat 138 continue to rise synchronously until the ram 136 moves relatively to the end of the third rail 1386 (as shown in fig. 7), at which point both the negative mold insert 134 and the lower die 120 rise to a highest level and the preform is above the top surface of the negative mold insert and the preform is removed smoothly.
For forming a compact with a central hole, the compact forming die 10 may further include a stem assembly (not shown) connected to the lower die cylinder and synchronously moved by the lower die cylinder.
Specifically, the stem assembly includes a stem and a stem cylinder connected to the stem, and an axial channel is provided at the center of the lower mold 120, in which the stem moves axially under the driving of the stem cylinder.
In addition, it should be noted that, in the present utility model, the powder blank forming mold further includes an upper mold cylinder for powering the upper mold and a mold frame for carrying the corresponding components, which are generally provided in the forming mold, and these are all conventional arrangements, and are not described herein.
The foregoing examples illustrate only a few embodiments of the utility model and are described in detail herein without thereby limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. The utility model provides a powder blank forming die, includes mould, lower mould and female die, after the compound die, go up mould and lower mould and enclose and close and form the die cavity in the female die, its characterized in that, the female die includes:
the female die sleeve is provided with a plurality of guide grooves on the inner peripheral surface;
the female mold inserts are corresponding to the guide grooves, and each female mold insert is slidably arranged in the corresponding guide groove;
the female mold inserts are arranged on the guide rail seats, and the female mold inserts are arranged on the guide rail seats;
in the press forming state, each female die insert is embedded in the corresponding guide groove, and the female die inserts are connected with each other along the circumferential direction to form a cavity wall;
in the demoulded state, each female mold insert slides at least partially out of the corresponding guide groove, the female mold inserts are separated from each other in the circumferential direction, and the powder blank is separated from the female mold inserts in the radial direction.
2. A compact forming die according to claim 1, wherein each of the guide grooves is tapered in the axial direction, the taper being 1 ° to 20 °.
3. The powder compact forming die of claim 1, wherein each female mold insert includes an integrally formed circumferential connection and T-shaped insert; in the press-formed state, the circumferential connecting portions of the female mold inserts are connected to each other to form the cavity wall; in the release state, the circumferential connections of the individual female mold inserts are separated from one another.
4. A powder compact forming die as claimed in claim 3, wherein each female die insert further comprises a hanging table covering the top surfaces of the circumferential connecting portion and T-shaped insert portion, each guide slot being provided with a slot wall matching the hanging table.
5. A compact forming die according to claim 1, 3 or 4, wherein there are 4 to 12 female inserts.
6. The powder compact forming die of claim 1, wherein each of the rail mounts is provided with a first rail and a second rail in communication with each other, and the second rail is biased toward the first rail; in the press forming state, each ejector rod relatively slides in the first guide rail of the corresponding guide rail seat; in the demolding state, the ejector rods slide relatively in the second guide rail of the corresponding guide rail seat.
7. The powder compact forming die of claim 6, wherein each of the rail mounts is further provided with a third rail in communication with the second rail, and the third rail is biased toward the second rail; and when each ejector rod slides relatively in the third guide rail of the corresponding guide rail seat, the powder blank is ejected out of the female die.
8. The powder compact forming die of claim 1, further comprising a lower die cylinder connected to the lower die and the rail mount, respectively, for driving the lower die and the rail mount to move synchronously.
9. The soot-forming die of claim 8, further comprising a stem assembly, said stem assembly being connected to said lower die cylinder.
10. The powder compact forming die of claim 9, wherein the stem assembly comprises a stem cylinder and a stem connected with the stem cylinder, an axial channel is arranged at the center of the lower die, and the stem moves axially in the axial channel under the drive of the stem cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321591103.0U CN220093045U (en) | 2023-06-21 | 2023-06-21 | Powder blank forming die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321591103.0U CN220093045U (en) | 2023-06-21 | 2023-06-21 | Powder blank forming die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220093045U true CN220093045U (en) | 2023-11-28 |
Family
ID=88865079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321591103.0U Active CN220093045U (en) | 2023-06-21 | 2023-06-21 | Powder blank forming die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220093045U (en) |
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2023
- 2023-06-21 CN CN202321591103.0U patent/CN220093045U/en active Active
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