Powder metallurgy mold with deviation prevention structure

Abstract

This utility model provides a powder metallurgy mold with an anti-deviation structure, relating to the field of mold technology, including a mold body; the mold body is provided with a bearing mold sleeve block, the top end face of the bearing mold sleeve block is provided with a bearing circular groove, the bottom wall of the bearing circular groove of the bearing mold sleeve block is provided with a through hole extending vertically, the left and right ends of the bottom wall of the bearing circular groove of the bearing mold sleeve block are provided with insertion holes extending vertically, the upper part of the inner circumference of the bearing circular groove of the bearing mold sleeve block is provided with a thread, and the upper left and right inner walls of the bearing circular groove of the bearing mold sleeve block are provided with upward through strip grooves, which facilitates the installation of a female mold cooling box inside the bearing mold sleeve block and connection with external pipes to achieve water circulation. It is convenient to control the temperature of the forming female mold cylinder through the water circulation of the female mold cooling box, which solves the problem that the powder metallurgy mold generates heat during the pressing process, and the mold overheating will cause the lubricant to decompose and fail at high temperature, thereby aggravating mold wear.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology, and in particular relates to a powder metallurgy mold with an anti-deviation structure. Background Technology

[0002] Powder metallurgy molds are key tools used for forming powder metallurgy products. They are usually composed of a female mold, a punch, and a mandrel. The main types include pressing molds, finishing molds, and repressing molds. Their core function is to ensure the geometry, dimensional accuracy, and density distribution of the blank after forming by designing the mold structure. Metal powder is pressed into a blank of a predetermined shape under high pressure, and then sintered and hardened to form the final part.

[0003] Based on the above, the inventors have discovered the following shortcomings in existing powder metallurgy molds:

[0004] 1. Powder metallurgy molds generate heat during the pressing process. Overheating of the mold can cause the lubricant to decompose and fail at high temperatures, thereby aggravating mold wear.

[0005] 2. The female mold is installed inside the mold sleeve by multiple hexagon socket head cap screws. Uneven distribution of the clamping force of the hexagon socket head cap screws can easily cause the female mold to shift. Utility Model Content

[0006] To address the aforementioned technical problems, this utility model provides a powder metallurgy mold with an anti-deviation structure. This solves the problem that existing powder metallurgy molds generate heat during the pressing process, and overheating of the mold can cause the lubricant to decompose and fail at high temperatures, thus aggravating mold wear. Furthermore, the female mold is installed inside the mold sleeve by multiple internal hexagonal bolts, which can easily cause the female mold to shift due to uneven distribution of the clamping force of the internal hexagonal bolts.

[0007] The purpose and effect of this utility model of powder metallurgy mold with anti-deviation structure are achieved by the following specific technical means:

[0008] A powder metallurgical mold with an anti-deviation structure includes a mold body; the mold body is provided with a bearing mold sleeve block, the top end face of the bearing mold sleeve block is provided with a bearing circular groove, the bottom wall of the bearing circular groove of the bearing mold sleeve block is provided with a through hole extending vertically, the left and right ends of the bottom wall of the bearing circular groove of the bearing mold sleeve block are provided with insertion holes extending vertically, the upper part of the inner circumference of the bearing circular groove of the bearing mold sleeve block is provided with a thread, the upper left and right sides of the inner wall of the bearing circular groove of the bearing mold sleeve block are provided with upward through strip grooves, a female mold cooling box is placed at the bottom of the bearing circular groove of the bearing mold sleeve block, the female mold cooling box is a cylindrical structure, the inner wall of the female mold cooling box is provided with a cavity, the left and right ends of the bottom end face of the female mold cooling box are provided with connecting pipes extending to the cavity, and the connecting pipes of the female mold cooling box are inserted into the insertion holes of the bearing mold sleeve block.

[0009] Furthermore, the lower die punch is provided with a blank hole mandrel inside, and a wear-resistant layer is provided on the outer circumferential surface of the blank hole mandrel.

[0010] Furthermore, a pressing lower die is inserted into the through hole of the bearing mold block. The pressing lower die has a cylindrical structure and wear-resistant layers are provided on both the inner and outer circumferential surfaces.

[0011] Furthermore, a pressing upper die punch is inserted into the upper part of the inner cavity of the female die fixing cylinder. The pressing upper die punch has a cylindrical structure and wear-resistant layers are provided on both the inner and outer circumferential surfaces.

[0012] Furthermore, a closed annular plate is inserted between the rotating blind holes of the female mold fixing cylinder, and four insertion posts are arranged in an annular array on the bottom end face of the closed annular plate. Downward insertion plates are arranged on both the left and right sides of the outer circumference of the closed annular plate.

[0013] Furthermore, a female mold fixing cylinder is threadedly installed on the upper part of the inner circumference of the bearing groove of the bearing mold sleeve block. The outer circumference of the female mold fixing cylinder is threaded, a protruding ring is provided on the inner side of the top end face of the female mold fixing cylinder, and four rotating blind holes are arranged in an annular array on the outer side of the top end face of the female mold fixing cylinder.

[0014] Furthermore, a forming female mold cylinder is installed between the strip grooves of the bearing mold block. An annular groove is opened on the lower outer circumference of the forming female mold cylinder, and anti-rotation blocks are provided on both the left and right sides of the upper outer circumference of the forming female mold cylinder.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The design allows for convenient installation of the female mold cooling box inside the supporting mold sleeve block and connection to external pipes for water circulation. This facilitates temperature control of the forming female mold cylinder through water circulation within the cooling box, solving the problem of heat generation during powder metallurgy mold pressing, which can lead to lubricant decomposition and failure at high temperatures, thus accelerating mold wear.

[0017] It facilitates the insertion of the forming female mold cylinder into the bearing mold sleeve block to prevent rotation, and facilitates the installation of the female mold fixing cylinder inside the bearing mold sleeve block via threads to press and fix the forming female mold cylinder. This solves the problem that when the female mold is installed inside the mold sleeve with multiple hexagonal bolts, the uneven distribution of the clamping force of the hexagonal bolts can easily cause the female mold to shift. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0019] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0020] Figure 3 This is a disassembled structural diagram of the present invention.

[0021] Figure 4 This is a bottom view of the closed annular plate of this utility model.

[0022] Figure 5 This is a top view of the bearing mold block of this utility model.

[0023] Figure 6 This is a top view of the female mold fixing cylinder of this utility model.

[0024] In the diagram: 1. Mold body; 2. Bearing mold sleeve block; 3. Female mold cooling box; 4. Forming female mold cylinder; 5. Female mold fixing cylinder; 6. Closed annular plate; 7. Pressing upper die punch; 8. Pressing lower die punch; 9. Blank hole core rod. Detailed Implementation

[0025] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0026] Example 1: As shown in the attached document Figure 1 To be continued Figure 6 As shown:

[0027] This utility model provides a powder metallurgy mold with an anti-deviation structure, including a mold body 1; the mold body 1 is provided with a bearing mold sleeve 2, which facilitates the bearing of various components, and the bearing mold sleeve 2 is in a cut-off state. The top end face of the bearing mold sleeve 2 has a bearing circular groove, which facilitates the placement of various components inside. The bottom wall of the bearing circular groove of the bearing mold sleeve 2 has a through hole that extends vertically, which facilitates the insertion of the pressing die punch 8 into the interior. The left and right ends of the bottom wall of the bearing circular groove of the bearing mold sleeve 2 have through insertion holes that extend vertically, which facilitate the insertion of the connecting pipe of the female mold cooling box 3 into the interior, and prevent the female mold cooling box 3 from rotating through the connecting pipe. The upper part of the inner circumference of the bearing circular groove of the bearing mold sleeve 2 has a thread, which facilitates the disassembly and assembly of the female mold fixing cylinder 5 through the thread. The upper left and right inner walls of the bearing circular groove of the bearing mold sleeve 2 have upward through-slots, which facilitate the placement and anti-rotation of the forming female mold cylinder 4. The bottom of the bearing groove of the bearing mold sleeve 2 is equipped with a female mold cooling box 3, which facilitates temperature control of the forming female mold cylinder 4. The female mold cooling box 3 has a cylindrical structure, which facilitates mutual fitting with the forming female mold cylinder 4. The cavity is provided in the inner wall of the female mold cooling box 3, which facilitates the entry of cooling water into the interior. Both ends of the bottom end face of the female mold cooling box 3 are provided with connecting pipes that pass through the cavity, which facilitates connection with external pipes to form water circulation. The connecting pipe of the female mold cooling box 3 is inserted into the insertion hole of the bearing mold sleeve 2, which facilitates the anti-rotation of the female mold cooling box 3. The forming female mold cylinder 4 is installed between the strip grooves of the bearing mold sleeve 2, which facilitates the placement of the forming female mold cylinder 4 to prevent rotation. The lower outer circumference of the forming female mold cylinder 4 is provided with an annular groove, which facilitates mutual fitting with the female mold cooling box 3. The upper outer circumference of the forming female mold cylinder 4 is provided with anti-rotation blocks on both sides, which facilitates the anti-rotation blocks to be placed inside the strip groove of the bearing mold sleeve 2 to prevent rotation.

[0028] The upper part of the inner circumference of the bearing groove of the bearing mold sleeve block 2 is threaded with a female mold fixing cylinder 5 for easy clamping and fixing of the forming female mold cylinder 4. The outer circumference of the female mold fixing cylinder 5 is threaded for easy disassembly and assembly. A raised ring is provided on the inner side of the top end face of the female mold fixing cylinder 5 for easy alignment with the closed annular plate 6. Four rotating blind holes are arranged in an annular array on the outer side of the top end face of the female mold fixing cylinder 5 for easy rotation and disassembly using tools. The closed annular plate 6 is inserted between the rotating blind holes of the female mold fixing cylinder 5 to facilitate the closure of the rotating blind holes of the female mold fixing cylinder 5 and the strip groove of the bearing mold sleeve block 2. Four insertion posts are arranged in an annular array on the bottom end face of the closed annular plate 6 for easy insertion into the rotating blind holes of the female mold fixing cylinder 5. Downward insertion plates are provided on both the left and right sides of the outer circumference of the closed annular plate 6 for easy insertion of bearing mold sleeve block 2. The slotted part of the mold carrier block 2 has a pressing upper die punch 7 inserted into the upper part of the female die fixing cylinder 5, which facilitates the forming of the top of the blank. The pressing upper die punch 7 has a cylindrical structure, which facilitates the insertion of the blank hole mandrel 9 into the interior. Both the inner and outer circumferential surfaces of the pressing upper die punch 7 are provided with wear-resistant layers to extend the service life of the pressing upper die punch 7. The through hole of the mold carrier block 2 has a pressing lower die punch 8 inserted into the interior, which facilitates the forming of the bottom of the blank. The pressing lower die punch 8 has a cylindrical structure, which facilitates the insertion of the blank hole mandrel 9 into the interior. Both the inner and outer circumferential surfaces of the pressing lower die punch 8 are provided with wear-resistant layers to extend the service life of the pressing lower die punch 8. The pressing lower die punch 8 has a blank hole mandrel 9 inside, which facilitates the formation of the blank inner hole through the blank hole mandrel 9. The outer circumferential surface of the blank hole mandrel 9 is provided with a wear-resistant layer to extend the service life of the blank hole mandrel 9.

[0029] The specific usage and function of this embodiment are as follows:

[0030] In this utility model, such as Figure 2As shown, the mold body 1 is in the state of pressing and forming the blank. The blank is between the upper pressing die 7 and the lower pressing die 8, located on the outer circumference of the blank hole mandrel 9, and on the inner circumference of the forming female mold cylinder 4 and the female mold fixing cylinder 5. The bearing mold sleeve block 2 is in the cut-off state. The lower ends of the lower pressing die 8 and the blank hole mandrel 9 are in the cut-off state. The upper end of the upper pressing die 7 is in the cut-off state. The lower end of the connecting pipe of the female mold cooling box 3 is in the cut-off state. When the female mold cooling box 3 is working, cooling water enters the cavity of the female mold cooling box 3 through the connecting pipe at the bottom of the female mold cooling box 3, forming a closed loop. The circulating water absorbs the heat conducted by the forming female mold cylinder 4 as it flows through the cavity of the female mold cooling box 3, maintaining a constant temperature of the mold. This solves the problem that powder metallurgy molds generate heat during the pressing process, and that overheating of the mold can cause the lubricant to decompose and fail at high temperatures, thus aggravating mold wear. The female mold fixing cylinder 5 is screwed into the interior of the bearing mold sleeve block 2 through threads. The female mold fixing cylinder 5 generates uniform pressure on the forming female mold cylinder 4, which solves the problem that the female mold is installed inside the mold sleeve by multiple internal hex bolts, which can easily cause the female mold to shift due to uneven distribution of the clamping force of the internal hex bolts.

[0031] Example 2: The difference from Example 1 is that the bottom end face of the female mold fixing cylinder 5 can also be set as a frosted surface, thereby increasing the friction between the bottom end face of the female mold fixing cylinder 5 and the forming female mold cylinder 4, and preventing the female mold fixing cylinder 5 from rotating and loosening.

[0032] Example 3: The difference from Example 1 is that a wear-resistant layer can also be provided on the inner circumferential surface of the female mold fixing cylinder 5, thereby increasing the wear resistance of the inner circumferential surface of the female mold fixing cylinder 5 and extending the service life of the female mold fixing cylinder 5.

Claims

1. A powder metallurgy mold with an anti-deviation structure, characterized in that: The mold body (1) includes a bearing mold sleeve block (2). The top end face of the bearing mold sleeve block (2) is provided with a bearing circular groove. The bottom wall of the bearing circular groove of the bearing mold sleeve block (2) is provided with a through hole that runs vertically through the center. The left and right ends of the bottom wall of the bearing circular groove of the bearing mold sleeve block (2) are provided with insertion holes that run vertically through the center. The upper part of the inner circumference of the bearing circular groove of the bearing mold sleeve block (2) is provided with a thread. The upper left and right inner walls of the bearing circular groove of the bearing mold sleeve block (2) are provided with upward through strip grooves. A female mold cooling box (3) is placed at the bottom of the bearing circular groove of the bearing mold sleeve block (2). The female mold cooling box (3) is a cylindrical structure. A cavity is provided inside the cylinder wall of the female mold cooling box (3). The left and right ends of the bottom end face of the female mold cooling box (3) are provided with connecting pipes that run through the cavity. The connecting pipes of the female mold cooling box (3) are inserted into the insertion holes of the bearing mold sleeve block (2).

2. The powder metallurgy mold with anti-deviation structure as described in claim 1, characterized in that: A forming female mold cylinder (4) is installed between the strip grooves of the bearing mold block (2). An annular groove is opened on the lower outer circumference of the forming female mold cylinder (4), and anti-rotation blocks are provided on both the left and right sides of the top outer circumference of the forming female mold cylinder (4).

3. The powder metallurgy mold with anti-deviation structure as described in claim 2, characterized in that: The upper part of the inner circumference of the bearing groove of the bearing mold sleeve block (2) is threadedly installed with a female mold fixing cylinder (5). The outer circumference of the female mold fixing cylinder (5) is threaded. A protruding ring is provided on the inner side of the top end face of the female mold fixing cylinder (5). Four rotating blind holes are arranged in an annular array on the outer side of the top end face of the female mold fixing cylinder (5).

4. The powder metallurgy mold with anti-deviation structure as described in claim 3, characterized in that: A closed annular plate (6) is inserted between the rotating blind holes of the female mold fixing cylinder (5). Four insertion posts are arranged in annular array on the bottom end face of the closed annular plate (6). Downward insertion plates are arranged on both the left and right sides of the outer circumference of the closed annular plate (6).

5. A powder metallurgy mold with an anti-deviation structure as described in claim 4, characterized in that: The upper part of the inner cavity of the female mold fixing cylinder (5) is inserted with a pressing upper die punch (7). The pressing upper die punch (7) is a cylindrical structure, and wear-resistant layers are provided on both the inner and outer circumferential surfaces of the pressing upper die punch (7).

6. The powder metallurgy mold with anti-deviation structure as described in claim 3, characterized in that: The bearing mold block (2) has a pressing lower die punch (8) inserted inside the through hole. The pressing lower die punch (8) is a cylindrical structure, and wear-resistant layers are provided on both the inner and outer circumferential surfaces of the pressing lower die punch (8).

7. A powder metallurgy mold with an anti-deviation structure as described in claim 6, characterized in that: The pressing die (8) has a blank hole mandrel (9) inside, and a wear-resistant layer is provided on the outer circumferential surface of the blank hole mandrel (9).

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