CN215033596U

CN215033596U - Hot-pressing graphite die for square powder metallurgy part

Info

Publication number: CN215033596U
Application number: CN202121355287.1U
Authority: CN
Inventors: 杨振远
Original assignee: Beijing Jinglong Special Carbon Technology Co ltd
Current assignee: Beijing Jinglong Special Carbon Technology Co ltd
Priority date: 2021-06-17
Filing date: 2021-06-17
Publication date: 2021-12-07
Anticipated expiration: 2031-06-17

Abstract

The utility model relates to a hot-pressing graphite die for square powder metallurgy parts, which comprises a graphite disc, a plurality of graphite stop blocks and graphite core blocks in one-to-one correspondence with the graphite stop blocks, wherein the side wall of the graphite disc is provided with an open slot for accommodating the graphite stop blocks, a first step is arranged in the middle of the bottom of the open slot, and two sides of the first step are respectively provided with a second step; the graphite check block is characterized in that a third step matched with the first step is arranged in the middle of the inner side wall of the graphite check block, the third step and the first step form a containing groove used for containing the graphite check block, and fourth steps matched with the second step are arranged on two sides of the third step. The hot-pressing graphite die for the square powder metallurgy part can be used for hot-pressing a plurality of square powder metallurgy parts at one time, and the efficiency is high; the powder metallurgy die has the advantages of simple structure, convenience in installation and disassembly, small die-removing difficulty after powder metallurgy, reusability, contribution to saving cost and good implementation effect.

Description

Hot-pressing graphite die for square powder metallurgy part

Technical Field

The utility model relates to a square powder metallurgy spare hot pressing graphite jig belongs to graphite products technical field.

Background

Powder metallurgy is a process technique for producing metal powder or metal powder (or a mixture of metal powder and nonmetal powder) as a raw material, and then forming and sintering the raw material to produce metal materials, composite materials and various products. The powder metallurgy method has similar places to the production of ceramics and belongs to the powder sintering technology, so a series of new powder metallurgy technologies can also be used for preparing ceramic materials. Due to the advantages of the powder metallurgy technology, the powder metallurgy technology becomes a key for solving the problem of new materials, and plays a significant role in the development of the new materials.

At present, most of the moulds for powder metallurgy are composed of sleeves or base-fitted pressurizing columns with grooves. The mould has the defects of difficult demoulding, and can only finish the manufacture of a square powder metallurgy part generally, so the metallurgical efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model provides a square powder metallurgy spare hot pressing graphite jig to the not enough of prior art existence, concrete technical scheme as follows:

a hot-pressing graphite die for a square powder metallurgy part comprises a graphite disc, a plurality of graphite stop blocks and graphite core blocks which correspond to the graphite stop blocks one to one, wherein the side wall of the graphite disc is provided with an open slot for accommodating the graphite stop blocks, a first step is arranged in the middle of the bottom of the open slot, and two sides of the first step are respectively provided with a second step; the graphite check block is characterized in that a third step matched with the first step is arranged in the middle of the inner side wall of the graphite check block, the third step and the first step form a containing groove used for containing the graphite check block, and fourth steps matched with the second step are arranged on two sides of the third step.

As an improvement of the technical scheme, the outer side wall of the graphite stop block is of a cambered surface structure, the periphery of the graphite disc is of a circular structure, and the radius of the outer side wall of the graphite stop block is equal to that of the periphery of the graphite disc.

As an improvement of the technical scheme, the number of the graphite stop blocks and the number of the open grooves are three.

As an improvement of the above technical solution, a round structure is arranged at the middle turning point of the first step, a round structure is arranged at the middle turning point of the second step, a round structure is arranged at the middle turning point of the third step, and a round structure is arranged at the middle turning point of the fourth step.

As an improvement of the technical scheme, the cross section of the graphite core block is square.

As an improvement of the technical scheme, the side edges of the two opposite corners of the graphite core block are provided with rounding parts.

As an improvement of the technical scheme, the graphite core block is in clearance fit with the accommodating groove.

The hot-pressing graphite die for the square powder metallurgy part can be used for hot-pressing a plurality of square powder metallurgy parts at one time, and the efficiency is high; the powder metallurgy die has the advantages of simple structure, convenience in installation and disassembly, small die-removing difficulty after powder metallurgy, reusability, contribution to saving cost and good implementation effect.

Drawings

FIG. 1 is a schematic structural view of a square powder metallurgy hot-pressing graphite mold according to the present invention;

FIG. 2 is a schematic distribution diagram of the graphite disc and the graphite stopper according to the present invention;

fig. 3 is a schematic structural view (in a top view) of the graphite disc according to the present invention;

fig. 4 is a schematic structural view (side view) of the graphite disc of the present invention;

FIG. 5 is a schematic view of the graphite disc and the graphite stop of the present invention during assembly;

fig. 6 is a schematic structural diagram of the graphite pellet of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in fig. 1 to 5, the square powder metallurgy hot-pressing graphite mold comprises a graphite disc 10, a plurality of graphite stoppers 20, and graphite core blocks 30 corresponding to the graphite stoppers 20 one by one, wherein an open groove 11 for accommodating the graphite stoppers 20 is formed in a side wall of the graphite disc 10, a notch of the open groove 11 extends to the periphery of the graphite disc 10, a first step 111 is formed in the middle of a groove bottom of the open groove 11, and second steps 112 are respectively formed on two sides of the first step 111; the middle of the inner side wall of the graphite stopper 20 is provided with a third step 21 matched with the first step 111, the third step 21 and the first step 111 form an accommodating groove 40 for accommodating the graphite stopper 20, and both sides of the third step 21 are provided with fourth steps 22 matched with the second step 112.

When the square powder metallurgy part hot-pressing graphite mold is used, the graphite stop block 20 is inserted into the opening groove 11, and the fourth step 22 is butted with the second step 112, so that the third step 21 and the first step 111 are oppositely arranged, and the accommodating groove 40 for accommodating the graphite stop block 20 is formed at the third step 21 and the first step 111. And pouring weighed powder to be metallurgical into the accommodating groove 40, and then installing the graphite core block 30 at the accommodating groove 40. When the assembled hot-pressing graphite die for the square powder metallurgy part is placed into a metallurgical furnace, pressure is applied to the graphite core block 30 at the same time, powder metallurgy is performed inside the metallurgical furnace, and the powder metallurgy process is a mature prior art and is not described herein again. After the metallurgy is finished, the graphite disc 10, the graphite stop block 20 and the graphite core block 30 are all made of graphite materials, so that the demolding difficulty is low, and the demolding process is as follows: firstly taking out the graphite stop block 20, then detaching the graphite core block 30, taking out the square powder metallurgy piece after metallurgy from the open slot 11, and then cleaning the surfaces of the graphite disc 10, the graphite stop block 20 and the graphite core block 30. If the surfaces of the graphite disc 10, the graphite stopper 20 and the graphite core block 30 are damaged, the corresponding graphite disc 10, the graphite stopper 20 and the graphite core block 30 can be replaced. The graphite disc 10, the graphite stop block 20 and the graphite core block 30 can be repeatedly used, and cost reduction is facilitated. The graphite disc 10, the graphite stop block 20 and the graphite core block 30 are simple and convenient to install and disassemble, the demolding difficulty is low, and the implementation effect is good. The hot-pressing graphite die for the square powder metallurgy parts can finish the manufacture of a plurality of square powder metallurgy parts at one time, and is beneficial to improving the metallurgical efficiency; and the square powder metallurgy parts obtained by metallurgy in the same furnace are made of graphite, the graphite has excellent thermal conductivity and small heat loss in the heat transfer process, so that the performance similarity of a batch of square powder metallurgy parts finally subjected to hot pressing is converged, and the stability is high.

Furthermore, the square powder metallurgy part is convenient to mount and dismount, and the influence of the gap on the square powder metallurgy part is reduced to the maximum extent; the graphite core blocks 30 are in a clearance fit with the receiving slots 40.

In the present embodiment, the graphite core blocks 30 have a square cross-section.

Example 2

In the present embodiment, the graphite stoppers 20 and the open grooves 11 are provided in three numbers.

Example 3

The outer side wall of the graphite stop block 20 is of an arc surface structure, the periphery of the graphite disc 10 is of a circular structure, and the radius of the outer side wall of the graphite stop block 20 (the arc surface has a corresponding radius due to the arc surface structure) is equal to the radius of the periphery of the graphite disc 10.

The graphite stop block 20 and the graphite disc 10 are designed in such a way that when the graphite stop block 20 is inserted into the open slot 11, the periphery of the graphite stop block is ensured to be in the same circular structure, and the subsequent cylinder fixing is facilitated.

Example 4

In order to further reduce the abrasion caused by collision during installation, the middle turning part of the first step 111 is provided with a rounding structure, the middle turning part of the second step 112 is provided with a rounding structure, the middle turning part of the third step 21 is provided with a rounding structure, and the middle turning part of the fourth step 22 is provided with a rounding structure.

Example 5

As shown in fig. 6, rounded portions 31 are provided at the side edges of the graphite core blocks 30 at the opposite corners.

Because the other two opposite corners of the graphite core block 30 are not provided with the rounding parts 31 which are sharp structures, on one hand, the excessive gap between the graphite stop block 20 and the open slot 11 is avoided; on the other hand, since there is certainly a slight gap (e.g., smaller than mm) between the graphite stopper 20 and the open groove 11, there is certainly a burr or a rib at this position, and therefore, it is certainly necessary to perform trimming subsequently, and in order to ensure a sufficient trimming margin, there is left a side edge where two opposite corners are located without providing the rounded portion 31. The mode of diagonal arrangement is adopted to ensure even stress.

After demolding, the side edges of the two remaining round portions 31 which are not provided with the round portions 31 may be optionally rounded to form new round portions 31.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a square powder metallurgy spare hot pressing graphite jig which characterized in that: the graphite core block structure comprises a graphite disc (10), a plurality of graphite stop blocks (20) and graphite core blocks (30) which correspond to the graphite stop blocks (20) one by one, wherein an open groove (11) used for accommodating the graphite stop blocks (20) is formed in the side wall of the graphite disc (10), a first step (111) is arranged in the middle of the bottom of the open groove (11), and second steps (112) are respectively arranged on two sides of the first step (111); the graphite check block is characterized in that a third step (21) matched with the first step (111) is arranged in the middle of the inner side wall of the graphite check block (20), the third step (21) and the first step (111) form a containing groove (40) used for containing the graphite check block (20), and fourth steps (22) matched with the second step (112) are arranged on two sides of the third step (21).

2. The square powder metallurgy hot-pressing graphite die according to claim 1, wherein: the outer side wall of the graphite stop block (20) is of a cambered surface structure, the periphery of the graphite disc (10) is of a circular structure, and the radius of the outer side wall of the graphite stop block (20) is equal to that of the periphery of the graphite disc (10).

3. The square powder metallurgy hot-pressing graphite die according to claim 1, wherein: the graphite stop blocks (20) and the open grooves (11) are all arranged in three.

4. The square powder metallurgy hot-pressing graphite die according to claim 1, wherein: the middle turning part of the first step (111) is provided with a rounding structure, the middle turning part of the second step (112) is provided with a rounding structure, the middle turning part of the third step (21) is provided with a rounding structure, and the middle turning part of the fourth step (22) is provided with a rounding structure.

5. The square powder metallurgy hot-pressing graphite die according to claim 1, wherein: the cross section of the graphite core block (30) is square.

6. The square powder metallurgy hot-pressing graphite die according to claim 5, wherein: and the side edges of the two opposite corners of the graphite core block (30) are provided with rounding parts (31).

7. The square powder metallurgy hot-pressing graphite die according to claim 1, wherein: the graphite core block (30) and the accommodating groove (40) are in clearance fit.