CN219703505U - Powder metallurgy forming die of belt pulley - Google Patents
Powder metallurgy forming die of belt pulley Download PDFInfo
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- CN219703505U CN219703505U CN202320630711.1U CN202320630711U CN219703505U CN 219703505 U CN219703505 U CN 219703505U CN 202320630711 U CN202320630711 U CN 202320630711U CN 219703505 U CN219703505 U CN 219703505U
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- 238000004663 powder metallurgy Methods 0.000 title claims abstract description 28
- 230000007704 transition Effects 0.000 claims description 8
- 238000007493 shaping process Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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Abstract
The utility model discloses a powder metallurgy forming die of a belt pulley, which comprises a forming female die, an upper punch, a lower triple punch and a forming core rod, wherein the upper punch is matched with the forming female die to form a belt pulley cavity, the upper punch is sleeved in the upper punch, the lower punch is positioned below the upper punch, the lower punch is sleeved in the lower punch, the lower triple punch is sleeved in the lower triple punch, and the forming core rod is sleeved in the lower triple punch, and the key point is that: an annular boss is arranged on the inner side of the lower end part of the upper punch, and the lower end surface of the upper punch is positioned above the lower end surface of the upper punch; the upper end face of the lower punch is positioned above the upper end face of the lower punch, and the upper end face of the lower punch is positioned between the upper end face of the lower punch and the upper end face of the lower punch. The special belt pulley is produced by designing the structure of the die and adopting the powder metallurgy technology, so that the cost is low, the production efficiency is high, and the labor intensity can be effectively reduced.
Description
Technical Field
The utility model belongs to the technical field of powder metallurgy, and particularly relates to a powder metallurgy forming die of a belt pulley.
Background
In the prior art, pulleys are relatively conventional parts that are typically formed by machining. Because the belt pulley is internally provided with structures such as lightening holes, bosses, grooves, chamfers and the like, the processing procedures are complex, the procedures are multiple, the material waste is serious, the production efficiency is low, the production cost is high, and the labor intensity of production personnel is high.
With the development of powder metallurgy technology, parts are manufactured through the processes of forming and sintering by using metal powder as a raw material, and the powder metallurgy material has a series of advantages of energy conservation, material saving, excellent performance, high precision, stability and the like, and is very suitable for mass production. When the belt pulley is produced by using the powder metallurgy technology, because the belt pulley is often a special-shaped workpiece designed according to the working condition, a special forming die is needed for compression forming, and the structure of the forming die is important for the forming quality of the belt pulley at the later stage.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a powder metallurgy forming die for a belt pulley, which can greatly reduce the processing procedures of the belt pulley and the waste of materials in the original mechanical processing, ensure the forming quality of the belt pulley, promote the production efficiency and reduce the labor intensity by designing a special die and processing the belt pulley through a powder metallurgy technology.
In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a powder metallurgy forming die of belt pulley, includes shaping bed die and with last dashing, the suit of shaping bed die cooperation formation belt pulley die cavity are in last dashing two dashes in last dashing, be located last dashing below next dashes, suit are in next dashes two dashes, suit are in next dashes down three dashes and suit is in the shaping plug of three dashes down, the key lies in: an annular boss is arranged on the inner side of the lower end part of the upper punch, and the lower end surface of the upper punch is positioned above the lower end surface of the upper punch;
the upper end face of the lower punch is positioned above the upper end face of the lower punch, and the upper end face of the lower triple punch is positioned between the upper end face of the lower punch and the upper end face of the lower punch;
and a guide part matched with the hollow cavity of the upper punch is arranged at the top of the forming core rod.
Further, the forming mandrel includes a support portion, a forming portion connected to the support portion and adapted to form a bearing mounting cavity, and a guide portion.
Further, the diameter of the forming part is larger than that of the supporting part, and the length of the forming part is smaller than that of the supporting part.
Further, a transition portion is provided between the forming portion and the guide portion.
Further, a conical boss is arranged between the transition part and the forming part, and the cone angle of the conical boss is 60-65 degrees.
Further, the radii of the inner chamfer and the outer chamfer of the annular boss are 1mm.
Further, the radii of the inner chamfer and the outer chamfer of the upper end part of the lower punch are 1mm.
Further, the unilateral clearance between the last punch and the cavity of the forming female die is 0.01-0.015mm.
Further, the unilateral clearance between the next punch and the cavity of the forming female die is 0.01-0.016mm.
Furthermore, a die sleeve is sleeved outside the forming female die, and the forming female die is in interference fit with the die sleeve.
The special belt pulley is produced by designing the structure of the die and combining the powder metallurgy technology, so that the cost is low, the production efficiency is high, and the labor intensity can be effectively reduced.
The present utility model will be described in detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic view of a powder metallurgy forming die of a pulley according to the present utility model;
FIG. 2 is a schematic diagram of the structure of the upper punch in the powder metallurgy forming die of the belt pulley of the present utility model;
FIG. 3 is a schematic view of the structure of a forming core rod in a powder metallurgy forming die of the pulley of the present utility model;
FIG. 4 is an enlarged view of a portion of FIG. 3 at A;
FIG. 5 is a schematic view of the structure of the pulley after the powder metallurgy forming die of the pulley is formed;
fig. 6 is a schematic view of the structure of the belt pulley machine of fig. 5 after machining.
In the drawing, 11, a forming female die, 12, a die sleeve, 13, an upper punch, 13-1, an annular boss, 14, an upper punch, 15, a lower punch, 16, a lower punch, 17, a lower triple punch, 18, a forming core rod, 18-1, a supporting part, 18-2, a forming part, 18-3, a transition part, 18-4, a guiding part, 18-5, a conical boss, 1, a first groove, 2, a second groove, 3, a first boss, 4, a second boss, 5 and a groove.
Detailed Description
Referring to fig. 1, 2 and 5, the utility model provides a powder metallurgy forming die of a belt pulley, which comprises a forming female die 11, an upper punch 13 matched with the forming female die 11 to form a belt pulley cavity, an upper two punches 14 sleeved in the upper punch 13, a lower punch 15 positioned below the upper punch 13, a lower two punches 16 sleeved in the lower punch 15, a lower three punches 17 sleeved in the lower two punches 16 and a forming core rod 18 sleeved in the lower three punches 17. The upper punch 13, the upper punch 14, the lower punch 15, the lower punch 16 and the lower punch 17 are hollow structures for sleeving matched parts. The inner side of the lower end part of the upper punch 13 is provided with an annular boss 13-1 extending axially, the radiuses of an inner chamfer and an outer chamfer of the annular boss 13-1 are 1mm, the lower end surface of the upper punch 14 is positioned above the lower end surface of the upper punch 13, and the design can enable the upper end surface of the formed belt pulley to be provided with an annular first groove 1 and a first boss 3 positioned inside the first groove 1 and extending outwards to the outer side of the upper end surface so as to be convenient for installing a dust cover; the upper end face of the lower punch 16 is located above the upper end face of the lower punch 15, the upper end face of the lower punch 17 is located between the upper end face of the lower punch 16 and the upper end face of the lower punch 15, and by means of the design, the lower end face of the belt pulley is provided with the annular second groove 2 and the second boss 4 which is located inside the second groove 2 and extends outwards so as to control the installation distance between the belt pulley and the matched installation shaft, and the second boss 4 is integrally located in the groove. The radii of the inner chamfer and the outer chamfer of the upper end of the lower punch 16 are 1mm.
The forming female die 11 is sleeved with a die sleeve 12, and the forming female die 11 is in interference fit with the die sleeve 12.
The unilateral clearance between the upper punch 13 and the cavity of the forming female die 11 is 0.01-0.015mm. The unilateral clearance between the next punch 15 and the cavity of the forming female die 11 is 0.01-0.016mm.
Referring to fig. 3 and 4, the forming mandrel 18 includes a support portion 18-1, a forming portion 18-2 connected to the support portion 18-1 for forming a bearing mounting cavity, a guide portion 18-4 cooperating with the hollow cavity of the upper punch 14, and a transition portion 18-3 located between the forming portion 18-2 and the guide portion 18-4. The diameter of the forming portion 18-2 is larger than the diameter of the supporting portion 18-1 and the length is smaller than the length of the supporting portion 18-1. The transition 18-3 is located below the end face of the annular boss 13-1. A conical boss 18-5 is arranged between the transition part 18-3 and the forming part 18-2, the cone angle of the conical boss 18-5 is preferably 60-65 degrees, and the specific design can be selected according to the product requirement.
The use process of the die disclosed by the utility model is as follows: the forming female die 11, the upper punch 13, the upper punch 14, the lower punch 15, the lower punch 16 and the forming core rod 18 are connected with matched driving devices such as a hydraulic press, an oil cylinder and the like. The next punch 15, the second punch 16, the third punch 17 and the forming mandrel 18 are moved upwards to position the end parts thereof in the cavity of the forming female die 11, then metal powder is added into the cavity, and finally the first punch 13 and the second punch 14 are moved downwards to be matched with the next punch 15, the second punch 16, the third punch 17 and the forming mandrel 18 to be pressed into a belt pulley blank body, as shown in fig. 5. After compression molding, the upper punch 13 and the upper punch 14 move upwards for resetting, the molding female die 11, the molding core rod 18 and the like move downwards, and demolding of the belt pulley blank body is completed.
After demolding of the pulley blank, the final pulley is formed by sintering and subsequent machining and/or heat treatment processes, as shown in fig. 6. A groove 5 is machined into the inner wall of the pulley first groove 1 to facilitate the installation of the dust cap.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same; while the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present utility model or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the utility model, it is intended to cover the scope of the utility model as claimed.
Claims (10)
1. The utility model provides a powder metallurgy forming die of belt pulley, includes shaping bed die (11) and with last dashing (13) of shaping bed die (11) cooperation formation belt pulley die cavity, suit last two dashes (14) in last dashes (13), be located last dashes (15) below of (13), suit is in next dashes (15) in lower two dashes (16), suit is in lower three dashes (17) and suit is in shaping plug (18) in lower three dashes (17) down, its characterized in that: an annular boss (13-1) is arranged on the inner side of the lower end part of the upper punch (13), and the lower end surface of the upper two punches (14) is positioned above the lower end surface of the upper punch (13);
the upper end face of the lower two punches (16) is positioned above the upper end face of the lower punch (15), and the upper end face of the lower three punches (17) is positioned between the upper end face of the lower two punches (16) and the upper end face of the lower punch (15);
the top of the forming core rod (18) is provided with a guide part (18-4) matched with the hollow cavity of the upper punch (14).
2. The powder metallurgy forming die of a pulley according to claim 1, wherein: the forming mandrel (18) comprises a supporting part (18-1), a forming part (18-2) connected with the supporting part (18-1) and used for forming a bearing installation cavity, and a guiding part (18-4).
3. The powder metallurgy forming die of the pulley according to claim 2, wherein: the diameter of the forming part (18-2) is larger than that of the supporting part (18-1), and the length is smaller than that of the supporting part (18-1).
4. The powder metallurgy forming die of the pulley according to claim 2, wherein: a transition section (18-3) is provided between the forming section (18-2) and the guide section (18-4).
5. The powder metallurgy forming die for a pulley according to claim 4, wherein: a conical boss (18-5) is arranged between the transition part (18-3) and the forming part (18-2), and the cone angle of the conical boss (18-5) is 60-65 degrees.
6. The powder metallurgy forming die of a pulley according to claim 1, wherein: the radii of the inner chamfer and the outer chamfer of the annular boss (13-1) are 1mm.
7. The powder metallurgy forming die of a pulley according to claim 1, wherein: the radii of the inner chamfer and the outer chamfer of the upper end part of the lower punch (16) are 1mm.
8. The powder metallurgy forming die for a pulley according to any one of claims 1 to 7, wherein: the unilateral clearance between the upper punch (13) and the cavity of the forming female die (11) is 0.01-0.015mm.
9. The powder metallurgy forming die for a pulley according to any one of claims 1 to 7, wherein: the unilateral clearance between the next punch (15) and the cavity of the forming female die (11) is 0.01-0.016mm.
10. The powder metallurgy forming die for a pulley according to any one of claims 1 to 7, wherein: a die sleeve (12) is sleeved outside the forming female die (11), and the forming female die (11) is in interference fit with the die sleeve (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320630711.1U CN219703505U (en) | 2023-03-28 | 2023-03-28 | Powder metallurgy forming die of belt pulley |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320630711.1U CN219703505U (en) | 2023-03-28 | 2023-03-28 | Powder metallurgy forming die of belt pulley |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219703505U true CN219703505U (en) | 2023-09-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320630711.1U Active CN219703505U (en) | 2023-03-28 | 2023-03-28 | Powder metallurgy forming die of belt pulley |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219703505U (en) |
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2023
- 2023-03-28 CN CN202320630711.1U patent/CN219703505U/en active Active
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