Powder metallurgy part sintering tool
By designing a graphite substrate and clamping strips, the deformation problem of powder metallurgy parts caused by temperature changes during sintering was solved, achieving stable clamping and uniform heating of the parts, and improving the sintering quality.
Patent Information
- Application Number
- CN202423217006.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-25
AI Technical Summary
Existing powder metallurgy parts are prone to deformation due to temperature changes during the sintering process because the thin sheet parts have insufficient strength, and the lack of clamping and limiting also leads to deformation problems.
A sintering tool using a graphite substrate and clamping bars is used to clamp the sheet parts through the first and second clamping bars. By utilizing the high melting point and high density properties of graphite, combined with the graphite sheet and limiting structure, the stability and uniform heating of the parts are ensured during the heating and cooling process.
It effectively prevents thin sheet parts from deforming due to temperature changes during sintering, improves clamping stability and heating uniformity, and reduces the risk of part deformation.
Smart Images
Figure CN223616766U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of powder metallurgy parts manufacturing technology, and in particular to a sintering tool for powder metallurgy parts. Background Technology
[0002] After being pressed into shape, powder metallurgy parts typically require sintering. Some of these parts are quite thin, resembling sheets. Current sintering methods involve laying multiple parts flat on a plate for sintering, followed by cooling them on the plate after sintering before removing them. During this sintering process, because the product is thin, the blank strength is insufficient, and there are no tools to clamp and limit the parts, the parts are prone to deformation during heating and cooling due to temperature changes and their free movement in space. Utility Model Content
[0003] To address at least one of the aforementioned problems, this application provides a powder metallurgy parts sintering tool.
[0004] This application provides a sintering tool for powder metallurgy parts, which adopts the following technical solution:
[0005] A powder metallurgy sintering tool includes a substrate, a first clamping bar, and a second clamping bar. The first clamping bar and the second clamping bar are both located on the top of the substrate and are arranged at intervals. The second clamping bar can move closer to or away from the first clamping bar. Multiple sheet parts are vertically placed on the substrate. The first clamping bar and the second clamping bar are respectively located at both ends of the arrangement direction of the multiple sheet parts. The first clamping bar and the second clamping bar abut against the sheet parts at their corresponding ends to drive the multiple sheet parts to be closely arranged on the substrate. The top of the first clamping bar and the second clamping bar are provided with protrusions. The protrusions are adapted for workers to grip and move the first clamping bar or the second clamping bar. The substrate is a graphite plate, and the first clamping bar and the second clamping bar are both graphite strips.
[0006] Optionally, the first clamping bar has a plug-in post on the side near the substrate, and the top of the substrate has a slot, in which the plug-in post is inserted. The second clamping bar can move closer to or away from the first clamping bar.
[0007] Optionally, the top of the substrate is provided with two graphite side strips spaced apart. The two graphite side strips, together with the first clamping strip and the second clamping strip, form a rectangular frame. The first clamping strip and the second clamping strip are both located between the two graphite side strips.
[0008] Optionally, a plurality of graphite plates are spaced apart between the first clamping bar and the second clamping bar, the arrangement direction of the plurality of graphite plates is consistent with the arrangement direction of the plurality of sheet parts, and sheet parts are clamped between two adjacent graphite plates.
[0009] Optionally, the graphite sheet is provided with ear plates at both ends, and the two ear plates are respectively located on the top of the two graphite side strips and are attached to the top of the corresponding graphite side strips.
[0010] Optionally, the graphite sheet abuts against the substrate on the side closest to the substrate.
[0011] Optionally, each of the two graphite side strips has a through hole on its opposite side, the through holes on the two graphite side strips are interconnected, and a graphite limiting strip is provided between the two graphite side strips. The two ends of the graphite limiting strip are respectively inserted into the through holes on the two graphite side strips. The graphite limiting strip is located on the side of the second clamping strip away from the first clamping strip and abuts against the second clamping strip.
[0012] Optionally, each of the graphite side strips is provided with a plurality of through holes, and the plurality of through holes are arranged at intervals along the direction of movement of the second clamping strip.
[0013] In summary, this application includes at least one of the following beneficial technical effects:
[0014] 1. The first and second clamping bars can clamp multiple vertically arranged thin sheet parts, making the multiple thin sheet parts closely arranged. During the heating or cooling process of the thin sheet parts, the thin sheet parts are clamped and limited, so it is not easy to detect deformation.
[0015] 2. Since the sintering temperature of the sheet parts is relatively high and the melting point of graphite is particularly high, the substrate is set as a graphite plate and the first and second clamping strips are both set as graphite strips. This makes the substrate, the first clamping strip and the second clamping strip less likely to melt or expand and contract due to temperature changes during the sintering of the sheet parts. In addition, graphite itself has a high density and heavy weight, so the first and second clamping strips are more stable after clamping the sheet parts and are less likely to move.
[0016] 3. The first clamping bar is inserted into the substrate through the plug-in post. When the second clamping bar is driven to move closer to the first clamping bar to clamp the sheet part, the first clamping bar is not easy to move due to the pushing force of the second clamping bar, which further improves the stability of the first clamping bar and the second clamping bar when clamping the part.
[0017] 4. The two directions of the thickness of the thin sheet part are respectively pressed against the two adjacent graphite sheets. Graphite itself has good thermal conductivity, so when the part is sintered, the part can be heated more evenly in all directions and is less likely to deform due to uneven heating.
[0018] 5. After the second clamping bar moves closer to the first clamping bar to clamp the sheet part, the two ends of the graphite limiting bar can be inserted into the corresponding through holes on the two graphite side bars respectively, making it difficult for the second clamping bar to move away from the first clamping bar and cause the parts to loosen, thus further improving the stability of the parts after clamping. Attached Figure Description
[0019] Figure 1 This is a structural diagram of the substrate, the first clamping strip, and the second clamping strip in Embodiment 1 of this application.
[0020] Figure 2 This is a structural diagram of the sintering tool in Embodiment 2 of this application.
[0021] Figure 3 This is an exploded view of the sintering tool in Embodiment 2 of this application.
[0022] Explanation of reference numerals in the attached drawings: 1. Substrate; 11. Slot; 12. Graphite side strip; 121. Through hole; 13. Graphite sheet; 131. Ear plate; 2. First clamping strip; 21. Protrusion; 22. Insertion post; 3. Second clamping strip; 31. Graphite limiting strip. Detailed Implementation
[0023] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.
[0024] This application discloses a sintering tool for powder metallurgy parts.
[0025] Example 1: Refer to Figure 1 The powder metallurgy part sintering tool includes a substrate 1, a first clamping bar 2 and a second clamping bar 3 located on the top of the substrate 1 and spaced apart. The second clamping bar 3 can move closer to or away from the first clamping bar 2. Multiple sheet parts are vertically placed on the substrate 1 and located between the first clamping bar 2 and the second clamping bar 3. The first clamping bar 2 and the second clamping bar 3 are adapted to drive the multiple sheet parts to be closely arranged on the substrate 1.
[0026] After multiple thin sheet parts are placed vertically, adjacent thin sheet parts are attached to each other. When the first clamping bar 2 and the second clamping bar 3 are in close contact with the corresponding ends of the thin sheet parts, the first clamping bar 2 and the second clamping bar 3 can drive the multiple thin sheet parts to be closely arranged on the substrate 1, thus providing a clamping and fitting limiting effect between adjacent thin sheet parts, making it less likely for the thin sheet parts to deform during the heating sintering or cooling process.
[0027] Reference Figure 1 Both ends of the top of the first clamping strip 2 are integrally formed with protruding posts 21; similarly, both ends of the top of the second clamping strip 3 are also integrally formed with protruding posts 21. In this way, when picking up or placing the first clamping strip 2 or the second clamping strip 3, the staff can hold the protruding posts 21 to pick up and move the first clamping post or the second clamping post, which improves the convenience of moving the first clamping strip 2 and the second clamping strip 3.
[0028] In this design, substrate 1 is a graphite plate, and both the first clamping strip 2 and the second clamping strip 3 are graphite strips. Because the sintering temperature of the sheet parts is relatively high, and graphite has a particularly high melting point, substrate 1, the first clamping strip 2, and the second clamping strip 3 are not easily melted or subjected to thermal expansion and contraction due to temperature changes during sintering along with the sheet parts. Furthermore, graphite itself has a high density and is heavy, thus the first clamping strip 2 and the second clamping strip 3 provide relatively stable clamping for the sheet parts, preventing them from easily shifting.
[0029] The implementation principle of a powder metallurgy part sintering tool according to an embodiment of this application is as follows: First, multiple thin sheet parts are vertically placed on a substrate 1, with each thin sheet part positioned between a first clamping strip 2 and a second clamping strip 3. Then, the second clamping strip 3 is driven to move towards the first clamping strip 2. The first clamping strip 2 and the second clamping strip 3 can clamp the multiple vertically arranged thin sheet parts, making them tightly arranged. The first clamping strip 2 and the second clamping strip 3 are graphite strips with high density and heavy weight, resulting in higher stability after clamping. During the heating or cooling process of the thin sheet parts, deformation is not easily detected because the thin sheet parts are clamped and limited.
[0030] Secondly, since the temperature is high when the sheet parts are sintered, and graphite has a particularly high melting point and is relatively stable, the substrate 1, the first clamping strip 2 and the second clamping strip 3 are not easy to melt or expand and contract due to temperature changes when sintering with the sheet parts.
[0031] Example 2, refer to Figure 2 and Figure 3 The difference between this embodiment and Embodiment 1 is that: the first clamping strip 2 has an integrally formed insertion post 22 on the side near the substrate 1, and two insertion posts 22 are spaced apart along the extension direction of the first clamping post. Two slots 11 are spaced apart on the top of the substrate 1, and the two insertion posts 22 are respectively inserted into the two slots 11. When the second clamping strip 3 is driven to move closer to the first clamping strip 2 to clamp the sheet part, the first clamping strip 2 is not easily moved by the pushing force of the second clamping strip 3.
[0032] In addition, two graphite side strips 12 are spaced apart on the top of the substrate 1. The two graphite side strips 12, together with the first clamping strip 2 and the second clamping strip 3, form a rectangular frame. The first clamping strip 2 and the second clamping strip 3 are both located between the two graphite side strips 12. In this way, the two graphite side strips 12 will limit the clamping direction of the sheet part perpendicular to the first clamping strip 2 and the second clamping strip 3, further preventing the sheet part from deforming during sintering or cooling.
[0033] Reference Figure 2 and Figure 3 Multiple graphite plates 13 are spaced apart between the first clamping bar 2 and the second clamping bar 3. The arrangement direction of the multiple graphite plates 13 is consistent with the arrangement direction of the multiple sheet parts. A sheet part is clamped between two adjacent graphite plates 13. The two directions of the sheet part's thickness are respectively pressed against the two adjacent graphite plates 13. Graphite itself has good thermal conductivity, so it can make the parts heat up more evenly during sintering.
[0034] More specifically, both ends of the graphite sheet 13 are integrally formed with ear plates 131. The two ear plates 131 are located on the top of the two graphite side strips 12 and are attached to the top of the corresponding graphite side strips 12. The two ends of the graphite sheet 13 near the two graphite side strips 12 abut against the two graphite side strips 12 respectively. This allows the graphite sheet 13 to move in a specific direction when compressed, preventing it from shifting and failing to adhere to the sheet part. The side of the graphite sheet 13 near the substrate 1 abuts against the substrate 1, thereby enabling the substrate 1 to support the graphite sheet 13 and share the stress borne by the ear plates 131, making the ear plates 131 less prone to breakage.
[0035] Reference Figure 2 and Figure 3 A graphite limiting strip 31 is provided on the side of the second clamping strip 3 away from the first clamping strip 2. Each of the two graphite side strips 12 has a through hole 121 on its opposite side, through which the corresponding through hole 121 passes, thus connecting the two through holes 121. Each graphite side strip 12 has multiple through holes 121, which are spaced apart along the direction of movement of the second clamping strip 3. The two ends of the graphite limiting strip 31 are respectively inserted into the through holes 121 on the two graphite side strips 12, and the graphite limiting strip 31 is located on the side of the second clamping strip 3 away from the first clamping strip 2 and abuts against the second clamping strip 3. Thus, after the second clamping bar 3 moves toward the first clamping bar 2 to clamp the sheet part, the two ends of the graphite limiting bar 31 can be inserted into the corresponding through holes 121 on the two graphite side bars 12 respectively, making it difficult for the second clamping bar 3 to move away from the first clamping bar 2 and cause the parts to loosen.
[0036] The implementation principle of a powder metallurgy part sintering tool in this application embodiment is as follows: the two directions of the thickness of the thin sheet part are respectively pressed against two adjacent graphite thin plates 13. Graphite itself has good thermal conductivity, so when the part is sintered, the part can be heated more evenly in all positions and is not prone to deformation due to uneven heating.
[0037] When the second clamping bar 3 is driven closer to the first clamping bar 2 to clamp the sheet part, the first clamping bar 2 is less likely to move due to the pushing force of the second clamping bar 3. After the second clamping bar 3 moves closer to the first clamping bar 2 to clamp the sheet part, the two ends of the graphite limiting bar 31 can be inserted into the corresponding through holes 121 on the two graphite side bars 12 respectively, making it less likely for the second clamping bar 3 to move away from the first clamping bar 2 and cause the parts to loosen, thus further improving the stability of the parts after clamping.
[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A sintering tool for powder metallurgy parts, characterized in that: The system includes a substrate (1), a first clamping bar (2), and a second clamping bar (3). The first clamping bar (2) and the second clamping bar (3) are both located on the top of the substrate (1) and are arranged at intervals. The second clamping bar (3) can move closer to or away from the first clamping bar (2). Multiple sheet parts are vertically placed on the substrate (1). The first clamping bar (2) and the second clamping bar (3) are located at opposite ends of the arrangement direction of the multiple sheet parts. The first clamping bar (2) and the second clamping bar (3) abut against the sheet parts at their corresponding ends to drive the multiple sheet parts to be closely arranged on the substrate (1). The top of the first clamping bar (2) and the second clamping bar (3) are provided with protrusions (21). The protrusions are suitable for workers to hold and move the first clamping bar (2) or the second clamping bar (3). The substrate (1) is a graphite plate, and the first clamping bar (2) and the second clamping bar (3) are both graphite strips.
2. The powder metallurgy sintering tool according to claim 1, characterized in that: The first clamping bar (2) has a plug-in post (22) on the side near the substrate (1). The substrate (1) has a slot (11) on the top. The plug-in post (22) is inserted into the slot (11). The second clamping bar (3) can move closer to or away from the first clamping bar (2).
3. The powder metallurgy sintering tool according to any one of claims 1 or 2, characterized in that: The substrate (1) has two graphite side strips (12) spaced apart on the top. The two graphite side strips (12), together with the first clamping strip (2) and the second clamping strip (3), form a rectangular frame. The first clamping strip (2) and the second clamping strip (3) are both located between the two graphite side strips (12).
4. The powder metallurgy part sintering tool according to claim 3, characterized in that: A plurality of graphite plates (13) are spaced apart between the first clamping bar (2) and the second clamping bar (3). The arrangement direction of the plurality of graphite plates (13) is consistent with the arrangement direction of the plurality of sheet parts. A sheet part is clamped between two adjacent graphite plates (13).
5. The powder metallurgy part sintering tool according to claim 4, characterized in that: The graphite sheet (13) has ear plates (131) at both ends. The two ear plates (131) are located on the top of the two graphite side strips (12) and are attached to the top of the corresponding graphite side strips (12).
6. The powder metallurgy part sintering tool according to claim 5, characterized in that: The graphite sheet (13) abuts against the substrate (1) on the side closest to the substrate (1).
7. The powder metallurgy part sintering tool according to claim 6, characterized in that: Each of the two graphite side strips (12) has a through hole (121) on its opposite side. The through holes (121) on the two graphite side strips (12) are interconnected. A graphite limiting strip (31) is provided between the two graphite side strips (12). The two ends of the graphite limiting strip (31) are respectively inserted into the through holes (121) on the two graphite side strips (12). The graphite limiting strip (31) is located on the side of the second clamping strip (3) away from the first clamping strip (2) and abuts against the second clamping strip (3).
8. The powder metallurgy part sintering tool according to claim 7, characterized in that: Each of the graphite side strips (12) is provided with a plurality of through holes (121), and the plurality of through holes (121) are arranged at intervals along the direction of movement of the second clamping strip (3).