CN220073269U - Powder metallurgy friction ring sintering tool - Google Patents
Powder metallurgy friction ring sintering tool Download PDFInfo
- Publication number
- CN220073269U CN220073269U CN202320188710.6U CN202320188710U CN220073269U CN 220073269 U CN220073269 U CN 220073269U CN 202320188710 U CN202320188710 U CN 202320188710U CN 220073269 U CN220073269 U CN 220073269U
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- cavity plate
- limiting
- powder metallurgy
- cavity
- chassis
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- 238000004663 powder metallurgy Methods 0.000 title claims abstract description 51
- 238000005245 sintering Methods 0.000 title claims abstract description 49
- 230000000670 limiting effect Effects 0.000 claims abstract description 83
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000002783 friction material Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000001272 pressureless sintering Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Powder Metallurgy (AREA)
Abstract
The utility model discloses a powder metallurgy friction ring sintering tool, which comprises a chassis, two layers of cavity discs and a pressure disc which are stacked in sequence from bottom to top, wherein: the chassis is provided with a plurality of chassis limiting grooves for placing limiting rings, the cavity plate is provided with a plurality of cavity plate cavity holes, both ends of the cavity plate cavity holes are provided with cavity plate limiting grooves for placing the limiting rings, the positions and the number of the chassis limiting grooves are corresponding to those of the cavity plate limiting grooves, limiting rings are arranged between the chassis and the bottom layer cavity plate, between the bottom layer cavity plate and the top layer cavity plate and between the top layer cavity plate and the pressure plate, powder metallurgy friction rings are placed in the cavity plate cavity holes, and both end faces of the powder metallurgy friction rings are respectively contacted with the end faces of the two limiting rings; and inserting a core rod into the inner hole of the limiting ring and the inner hole of the powder metallurgy friction ring. The sintered powder metallurgy friction ring not only can meet the external dimension and performance requirements of the process technology, but also can reduce the sintering cost and improve the sintering efficiency.
Description
Technical Field
The utility model relates to a powder metallurgy friction ring sintering tool.
Background
The powder metallurgy friction material is widely used in the fields of sliding electric contact materials, self-lubricating materials, engineering machinery brake clutches and the like due to the good comprehensive performance of the powder metallurgy friction material. Sintering is a key procedure in the manufacturing process of the powder metallurgy friction material, and the main reason is that the bonding state between powder particles of the pressed powder of the friction body is changed from mechanical engagement into crystal bonding among atoms in the sintering process, the defect of pressed pores is gradually reduced, the densification degree is continuously increased, the physical and mechanical properties of the friction body are obviously improved, and the powder metallurgy friction material meeting the requirements of the external dimension and the technological properties is finally obtained.
The traditional sintering method is to perform pressureless sintering on the powder metallurgy friction ring pressed compact in a natural state (directly placing the pre-pressed friction ring in a sintering furnace) or perform pressurized sintering on two end surfaces of the friction ring pressed compact, so as to ensure the height of a sintered finished product. However, most powder metallurgy friction materials can expand radially and axially in the sintering process, so that cylindricity and coaxiality of the inner circle and the outer circle of a sintered finished product are difficult to meet standard requirements, the fluctuation of the external dimensions of the product is large, and the performance of the product is inconsistent, and therefore the assembly, installation, use and operation of the powder metallurgy friction ring are affected. In addition, the existing sintering method has the problems of low working efficiency, high sintering cost, energy waste and the like.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model provides a powder metallurgy friction ring sintering tool, so that the sintered powder metallurgy friction ring can not only meet the requirements on the external dimension and the performance of the process technology, but also reduce the sintering cost and improve the sintering efficiency.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides a powder metallurgy friction ring sintering frock, includes from bottom to top chassis, two-layer chamber dish and the pressure disk that stacks gradually, wherein: the chassis is provided with a plurality of chassis limiting grooves for placing limiting rings, the cavity plate is provided with a plurality of cavity plate cavity holes, both ends of the cavity plate cavity holes are provided with cavity plate limiting grooves for placing the limiting rings, the positions and the number of the chassis limiting grooves are corresponding to those of the cavity plate limiting grooves, limiting rings are arranged between the chassis and the bottom layer cavity plate, between the bottom layer cavity plate and the top layer cavity plate and between the top layer cavity plate and the pressure plate, powder metallurgy friction rings are placed in the cavity plate cavity holes, and both end faces of the powder metallurgy friction rings are respectively contacted with the end faces of the two limiting rings; and inserting a core rod into the inner hole of the limiting ring and the inner hole of the powder metallurgy friction ring.
Compared with the prior art, the utility model has the following positive effects:
(1) The good limiting effect of the sintering tool provided by the utility model ensures uniformity and stability of the product size and ensures that all performances of the sintered product meet technical requirements;
(2) The sintering tool breaks through the traditional thinking and settling of precisely controlling the pressure to ensure the product height, ensures that the size of the sintered finished product is consistent in height through ingenious structural design, and simultaneously effectively improves the sintering efficiency, saves the energy consumption and the production cost;
(3) According to the sintering tool, the central holes are designed on the chassis, the cavity disc and the pressure disc, and gaps are reserved among the discs, so that the infiltration and circulation of sintering atmosphere in the sintering process can be ensured, and the sintering quality is ensured.
(4) The sintering tool disclosed by the utility model can effectively control the overall dimension of the sintered product, and ensure that the height, cylindricity and inner and outer circle coaxiality of the product can meet the standard requirements.
(5) The sintering tool provided by the utility model can effectively avoid fluctuation of the sintering size and the sintering performance of the product caused by fluctuation of the pressure of the sintering equipment.
(6) The sintering tool can be assembled in a circulating and overlapping mode, has high sintering efficiency, can save energy and reduces the production cost of products.
Drawings
The utility model will now be described by way of example and with reference to the accompanying drawings in which:
FIG. 1 is a schematic structural view of an assembled pressureless sintering tool;
fig. 2 is a schematic structural view of the chassis 100;
fig. 3 is a schematic structural view of the stop collar 200;
FIG. 4 is a schematic diagram of the structure of a chamber plate 300;
FIG. 5 is a schematic view of a mandrel 500;
FIG. 6 is a schematic view of the platen 600;
FIG. 7 is a schematic structural view of a powder metallurgy friction ring 400;
reference numerals in the drawings include: 100-chassis, 110-chassis center round through holes, 120-chassis limit grooves, 200-limit rings, 210-limit ring inner holes, 300-cavity plates, 310-cavity plate center round through holes, 320-cavity plate cavity holes, 330-cavity plate limit grooves, 400-powder metallurgy friction rings, 410-powder metallurgy friction ring inner holes, 500-core rods, 600-pressure plates and 610-pressure plate center round through holes.
Detailed Description
As shown in fig. 1, the friction ring sintering tool provided by the utility model comprises: chassis 100, cavity plate 300, mandrel 500, stop collar 200 and platen 600, wherein:
as shown in fig. 2, the chassis 100 is provided with a chassis center circular through hole 110, and a plurality of chassis limiting grooves 120 are arranged around the chassis center circular through hole.
As shown in fig. 3, the stop collar 200 is provided with a stop collar bore 210.
As shown in fig. 4, the center of the cavity plate 300 is provided with a cavity plate center circular through hole 310, a plurality of cavity plate cavity holes 320 are arranged around the cavity plate center circular through hole, and both ends of the cavity plate cavity holes are provided with cavity plate limiting grooves 330.
The structure of the core rod 500 is shown in fig. 5, the bottom round end surface of the core rod 500 contacts with the bottom of the bottom plate limiting groove 120, and the top round end surface of the core rod 500 is flush with the top surface of the top cavity plate 300, as shown in fig. 1.
As shown in fig. 6, the platen 600 is provided with a platen center circular through hole 610.
As shown in fig. 7, the powder metallurgy friction ring 400 is provided with a powder metallurgy friction ring inner hole 410.
As shown in fig. 1, the stop collar 200 is engaged with the chassis stop slot 120 or with the cavity plate stop slot 330. The powder metallurgy friction ring 400 is matched with the cavity plate cavity hole 320, and two end surfaces of the powder metallurgy friction ring are respectively contacted with the end surfaces of the two limiting rings 200; the core rod 500 is respectively matched with the limiting ring inner hole 210 and the powder metallurgy friction ring inner hole 410; the pressure plate 600 is in end-face contact with the stop collar 200. The chassis limit slots 120 correspond to the positions and the number of the cavity plate limit slots 330. After the assembly of the sintering tool is completed, a certain gap is reserved between the chassis 100 and the bottom cavity plate 300, a certain gap is reserved between the bottom cavity plate 300 and the top cavity plate 300, a certain gap is reserved between the pressure plate 600 and the top cavity plate 300, and the length of the core rod 500 is equal to the distance between the top surface of the top cavity plate and the bottom surface of the chassis limiting groove.
The chassis 100, the limiting ring 200, the cavity plate 300, the core rod 500 and the pressing plate 600 of the sintering tool are all made of high-strength graphite.
Embodiments are described below:
1) Placing the sintering pallet 100 on a bell jar furnace base;
2) A plurality of limiting rings 200 are respectively arranged in the chassis limiting grooves 120;
3) Correspondingly placing a plurality of cavity plate limiting grooves 330 on the bottom surface of the cavity plate 300 on the limiting ring 200 in the step 2), wherein a certain distance gap is reserved between the chassis 100 and the cavity plate 300 because the sum of the depth of the chassis limiting groove 120 and the depth of the cavity plate limiting groove 330 is smaller than the height of the limiting ring 200;
4) Placing a plurality of powder metallurgy friction rings 400 in the cavity plate cavity holes 320 of the cavity plate 300 in the step 3);
5) Placing a plurality of limiting rings 200 in the limiting grooves 330 of the top surface of the cavity plate 300 in the step 3);
6) And (5) correspondingly placing a plurality of cavity plate limiting grooves 330 on the bottom surface of the other cavity plate 300 on the limiting ring 200 in the step 5), wherein a certain distance gap is reserved between the two cavity plates because the sum of the depths of the two cavity plate limiting grooves 330 is smaller than the height of the limiting ring 200.
7) Another plurality of powder metallurgy friction rings 400 are respectively placed in the cavity plate cavity holes 320 of the cavity plate 300 in step 6).
8) And (6) placing a plurality of limiting rings 200 in the limiting grooves 330 of the top surface of the cavity plate 300.
9) Penetrating a plurality of core rods 500 into the inner hole 210 of the limiting ring in step 8), the inner hole of the friction ring of powder metallurgy in step 7), the inner hole of the limiting ring in step 5), the inner hole of the friction ring of powder metallurgy in step 4) and the inner hole of the limiting ring in step 2) in sequence, wherein the round end face of the bottom of the core rod 500 contacts with the bottom of the limiting groove 120 of the chassis, and the round end face of the top of the core rod 500 is flush with the top surface of the top cavity plate 300.
10 Placing the pressure plate 600 on the top round end surfaces of the limiting rings 200 in the step 8).
11 Repeating the steps 1) to 10) to form a sintering tower body with a set height, and applying pressure on a top pressure plate of the tower body in the sintering process.
The working principle of the utility model is as follows:
according to the friction ring sintering tool provided by the utility model, through the limiting effect of the limiting rings and the core rods at the upper end and the lower end of the cavity plate, the coaxiality of the inner circle and the outer circle of the sintered powder metallurgy friction ring can be effectively ensured; under the action of the cavity holes of the cavity plate and the core rod, the cylindricity of the sintered powder metallurgy friction ring is effectively ensured. In the sintering process, a certain pressure is applied to the pressing plate at the top, and when the end face of the limiting ring is not contacted with the bottom face of the limiting groove or is in contact with the bottom face of the limiting groove, the limiting ring directly pressurizes the powder metallurgy friction ring; when the end face of the limiting ring is in full contact with the bottom face of the limiting groove, the limiting ring can not continuously pressurize the powder metallurgy friction ring, so that the height of the sintered powder metallurgy friction ring is guaranteed to be the design height, and meanwhile, the stability and uniformity of the performance of the sintered powder metallurgy friction ring are guaranteed.
Claims (9)
1. A powder metallurgy friction ring sintering tool is characterized in that: including from bottom to top stacked chassis, two-layer chamber dish and pressure disk in proper order, wherein: the chassis is provided with a plurality of chassis limiting grooves for placing limiting rings, the cavity plate is provided with a plurality of cavity plate cavity holes, both ends of the cavity plate cavity holes are provided with cavity plate limiting grooves for placing the limiting rings, the positions and the number of the chassis limiting grooves are corresponding to those of the cavity plate limiting grooves, limiting rings are arranged between the chassis and the bottom layer cavity plate, between the bottom layer cavity plate and the top layer cavity plate and between the top layer cavity plate and the pressure plate, powder metallurgy friction rings are placed in the cavity plate cavity holes, and both end faces of the powder metallurgy friction rings are respectively contacted with the end faces of the two limiting rings; and inserting a core rod into the inner hole of the limiting ring and the inner hole of the powder metallurgy friction ring.
2. The powder metallurgy friction ring sintering tool according to claim 1, wherein: and a limiting ring is arranged in the chassis limiting groove and the cavity disk limiting groove on the bottom surface of the bottom cavity disk corresponding to the chassis limiting groove, and the height of the limiting ring is larger than the sum of the depth of the chassis limiting groove and the depth of the cavity disk limiting groove.
3. The powder metallurgy friction ring sintering tool according to claim 1, wherein: and a limiting ring is arranged in the cavity plate limiting groove on the top surface of the bottom cavity plate and the cavity plate limiting groove on the bottom surface of the top cavity plate, which corresponds to the cavity plate limiting groove, and the height of the limiting ring is larger than the sum of the depths of the two cavity plate limiting grooves.
4. The powder metallurgy friction ring sintering tool according to claim 1, wherein: and a limiting ring is arranged in a cavity disc limiting groove on the top surface of the top cavity disc, and the height of the limiting ring is greater than the depth of the cavity disc limiting groove.
5. The powder metallurgy friction ring sintering tool according to claim 1, wherein: the bottom round end face of the core rod is contacted with the bottom of the chassis limiting groove, and the top round end face of the core rod is flush with the top face of the top cavity plate.
6. The powder metallurgy friction ring sintering tool according to claim 1, wherein: the chassis is provided with a central round through hole.
7. The powder metallurgy friction ring sintering tool according to claim 1, wherein: the cavity plate is provided with a central circular through hole.
8. The powder metallurgy friction ring sintering tool according to claim 1, wherein: the pressure plate is provided with a central circular through hole.
9. The powder metallurgy friction ring sintering tool according to claim 1, wherein: the chassis, the limiting ring, the cavity plate, the core rod and the pressure plate are all made of high-strength graphite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320188710.6U CN220073269U (en) | 2023-01-30 | 2023-01-30 | Powder metallurgy friction ring sintering tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320188710.6U CN220073269U (en) | 2023-01-30 | 2023-01-30 | Powder metallurgy friction ring sintering tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220073269U true CN220073269U (en) | 2023-11-24 |
Family
ID=88822089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320188710.6U Active CN220073269U (en) | 2023-01-30 | 2023-01-30 | Powder metallurgy friction ring sintering tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220073269U (en) |
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2023
- 2023-01-30 CN CN202320188710.6U patent/CN220073269U/en active Active
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