CN216632586U - Forming die of thin-wall fixed inner gear ring - Google Patents
Forming die of thin-wall fixed inner gear ring Download PDFInfo
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- CN216632586U CN216632586U CN202123337440.0U CN202123337440U CN216632586U CN 216632586 U CN216632586 U CN 216632586U CN 202123337440 U CN202123337440 U CN 202123337440U CN 216632586 U CN216632586 U CN 216632586U
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Abstract
The utility model discloses a forming die for a thin-wall fixed inner gear ring, which comprises an upper punch, a middle die, a next punch and a lower second punch, wherein a cavity is arranged in the middle die, the next punch is sleeved on the outer wall of the lower second punch, the next punch comprises a sleeve and a rack, the rack is arranged on the inner wall of the sleeve and extends out of the top end of the sleeve, convex blocks are uniformly distributed on the outer side wall of the lower second punch in the axial direction, a lower positioning block is arranged in the middle of the outer side wall of each convex block, a tooth socket is arranged between adjacent convex blocks, the tooth socket is matched with the rack, the top end of the lower second punch is provided with a boss, the outer peripheral surface of the boss is provided with outer straight teeth, and the top end of the sleeve is provided with a slot matched with the lower positioning block; the outer wall of the upper punch is provided with an upper positioning block corresponding to the lower positioning block, the inner wall of the upper punch is provided with inner straight teeth matched with the outer straight teeth of the boss, and the inner wall of the cavity is provided with positioning grooves matched with the upper positioning block and the lower positioning block. The utility model can press and form the required workpiece at one time, and is simple and efficient.
Description
Technical Field
The utility model relates to the technical field of powder metallurgy, in particular to a forming die for a thin-wall fixed inner gear ring.
Background
At present, along with the increasing demand on the power of a motor, the requirement on the strength of a speed reducing mechanism in the motor is also higher, and an inner gear ring is taken as an important positioning part and needs to bear larger and larger torsion, so that a thin-wall fixed inner gear ring with a positioning block and a tooth claw is newly designed in our factory. However, the die is divided into a next punch, a next second punch and a core rod structure by using the traditional powder metallurgy pressing production process, the wall thickness of the outer claw and the involute large-diameter die corresponding to the next second punch is only 0.46 mm, and the die strength is extremely low under the condition, so that the requirement of batch production cannot be met.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a forming die for a thin-wall fixed inner gear ring, which can be used for manufacturing a novel thin-wall fixed inner gear ring through one-step forming and simultaneously improving the strength of the die.
In order to achieve the purpose, the utility model provides the following technical scheme:
a forming die for fixing an inner gear ring through a thin wall comprises an upper punch, a middle punch, a next punch and a next punch, wherein a cavity is arranged in the middle punch, the next punch is sleeved on the outer wall of the next punch, the next punch comprises a sleeve and a rack, the rack is arranged on the inner wall of the sleeve and extends out of the top end of the sleeve, the next punch is a columnar rigid body, convex blocks are uniformly distributed on the outer side wall of the next punch in the axial direction, grooves are formed in the top ends of the convex blocks, a lower positioning block is arranged in the middle of the outer side wall of each convex block, tooth grooves are formed between every two adjacent convex blocks, the tooth grooves are tightly inserted into the rack, a boss is arranged at the top end of the next punch, outer straight teeth are arranged on the outer peripheral surface of the boss, and a slot matched with the lower positioning block is formed in the top end of the sleeve; the outer wall of the upper punch is provided with an upper positioning block corresponding to the lower positioning block, the inner wall of the upper punch is provided with inner straight teeth matched with the outer straight teeth of the boss, and the inner wall of the cavity is provided with a positioning groove matched with the upper positioning block and the lower positioning block. And sleeving the next punch outside the lower second punch, inserting the rack of the next punch and the tooth socket of the lower second punch to form a tooth claw of the thin-wall fixed inner gear ring, forming a positioning boss of the thin-wall fixed inner gear ring by using the upper positioning block, the lower positioning block and the positioning groove in the cavity, filling powder into the cavity, and simultaneously pressing the upper punch and the lower punch in opposite directions to form the thin-wall fixed inner gear ring by one-step pressing. Meanwhile, the core rod and the lower punch are combined into a whole, so that the strength of the die is guaranteed.
Preferably, the racks are uniformly and symmetrically distributed at the top end of the sleeve, and the number of the racks is eight. The number of the racks can be adjusted according to the actual product requirement.
Preferably, the number of the bumps is eight. The number of the convex blocks corresponds to the number of the racks, and the convex blocks can be adjusted according to the actual product requirement.
Preferably, the lower positioning blocks at the top ends of the lugs are arranged at intervals, and the number of the lower positioning blocks is 4.
Preferably, the number of the upper positioning blocks is 4. The number of the upper positioning blocks corresponds to that of the lower positioning blocks.
Preferably, the length of the tooth groove is larger than that of the rack, and the rack keeps a distance from the top end of the tooth groove. And a tooth claw structure of the thin-wall fixed inner gear ring is formed by utilizing the space between the rack and the tooth groove.
Preferably, the bottom of the lower second punch is provided with a base. The base makes the mould more stable when suppressing.
Compared with the prior art, the utility model has the following advantages:
the forming die for the thin-wall fixed inner gear ring divides the lower punch into the next punch and the lower second punch, the next punch is sleeved with the lower second punch, the space between the rack and the lug forms a tooth claw of the inner gear ring, the lower positioning block and the upper positioning block form a positioning boss of the inner gear ring in a cavity of the middle die, and meanwhile, when the upper punch presses the die powder, the next punch and the lower second punch move upwards simultaneously along the pressing direction of the upper punch until the powder is completely compacted, the thin-wall fixed inner gear ring is formed by one-time pressing, the density of the thin-wall fixed inner gear ring is increased, the manufacturing process is reduced, the production cost is reduced, and the product quality is improved.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is an exploded sectional view of the present invention;
FIG. 4 is a schematic view of the installation of the next punch and the next punch;
FIG. 5 is a schematic view of a next punch;
FIG. 6 shows a thin-walled fixed ring gear made by the forming mold of the present invention;
wherein, 1-upper punch, 101-upper positioning block, 102-inner straight tooth, 2-middle die, 201-die cavity, 202-positioning groove, 3-next punch, 301-rack, 302-slot, 303-sleeve, 4-next punch, 401-lug, 402-positioning block, 403-base, 404-lug boss, 405-outer straight tooth, 5-thin wall fixed inner gear ring
Detailed Description
The following detailed description of the present invention will be further illustrated with reference to the accompanying drawings and detailed description, it is to be understood that these embodiments are merely illustrative of the present invention and are not intended to limit the scope of the present invention, and that various equivalent modifications thereof can be made by those skilled in the art without inventive faculty after reading the present invention, which fall within the scope of the appended claims of the present application.
As shown in fig. 1 to 6, a forming die for a thin-wall fixed ring gear comprises an upper punch 1, a middle punch 2, a next punch 3 and a next punch 4, wherein a cavity 201 is arranged in the middle punch 2, the next punch 3 is sleeved on the outer wall of the next punch 4, the next punch 3 comprises a sleeve 303 and a rack 301, the rack 301 is symmetrically distributed on the inner wall of the sleeve 303 and extends out of the top end of the sleeve 303, the next punch 4 is a columnar rigid body, eight bumps 401 are uniformly distributed on the outer side wall of the next punch 4 in the axial direction, a groove is arranged at the top end of the bump 401, a lower positioning block 402 is arranged in the middle of the outer side wall of the bump 401, a bump 401 without a lower positioning block 402 is arranged between adjacent lower positioning blocks 402, the number of the bumps 401 and the lower positioning blocks 402 can be adjusted according to actual requirements, a tooth space is arranged between adjacent bumps 401, the tooth space and the rack 301 can be tightly inserted, thereby being beneficial to forming of the ring gear, the distance between the top end of the rack 301 and the top end of the tooth groove is kept, the length of the tooth groove is larger than that of the rack 301, the top end of the lower secondary punch 4 is provided with a boss 404, the outer peripheral surface of the boss 404 is provided with outer straight teeth 405, the top end of the sleeve 303 is provided with a slot 302 matched with the lower positioning block 402, the sleeve is conveniently inserted on the lower secondary punch 4, the bottom of the lower secondary punch 4 is provided with a base 403, and the stability of the die during pressing is improved; an upper positioning block 101 corresponding to the lower positioning block 402 is axially arranged on the outer wall of the upper punch 1, inner straight teeth 102 matched with the outer straight teeth 405 of the boss are arranged on the inner wall of the upper punch 1, and a positioning groove 202 matched with the upper positioning block 101 and the lower positioning block 402 is formed in the inner wall of a middle die cavity 201.
The specific working process and principle of the utility model are as follows: sleeving the next punch 3 outside the lower second punch 4, extending the top ends of the next punch 3 and the lower second punch 4 into the lower part of a cavity 201 of a middle die from bottom to top, filling powder into the cavity 201, extending the bottom end of the upper punch 1 into the upper part of the cavity 201 from top to bottom, and continuing to press down until the inner straight teeth 102 on the inner wall of the upper punch 1 are matched with the outer straight teeth 405 of the lower second punch 4, and pressing the upper punch 1, the next punch and the second punch in opposite directions at the moment to press and form the thin-wall fixed ring gear at one time.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (7)
1. A forming die for fixing an inner gear ring through a thin wall comprises an upper punch, a middle punch, a next punch and a second punch, wherein a cavity is arranged in the middle punch; the outer wall of the upper punch is provided with an upper positioning block corresponding to the lower positioning block, the inner wall of the upper punch is provided with inner straight teeth matched with the outer straight teeth of the boss, and the inner wall of the cavity is provided with a positioning groove matched with the upper positioning block and the lower positioning block.
2. The forming die for the thin-wall fixed ring gear according to claim 1, wherein: the rack evenly symmetric distribution is in sleeve top, and rack quantity is eight.
3. The forming die for the thin-wall fixed ring gear according to claim 2, wherein: the number of the convex blocks is eight.
4. The forming die for the thin-wall fixed ring gear according to claim 3, wherein: the lower positioning blocks at the top ends of the convex blocks are arranged at intervals, and the number of the lower positioning blocks is 4.
5. The forming die for the thin-wall fixed inner gear ring according to claim 4, wherein: the number of the upper positioning blocks is 4.
6. The forming die for the thin-wall fixed ring gear according to claim 1, wherein: the length of the tooth groove is larger than that of the rack, and the distance between the rack and the top end of the tooth groove is kept.
7. The forming die for the thin-wall fixed ring gear according to claim 1, wherein: and a base is arranged at the bottom of the lower second punch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123337440.0U CN216632586U (en) | 2021-12-28 | 2021-12-28 | Forming die of thin-wall fixed inner gear ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123337440.0U CN216632586U (en) | 2021-12-28 | 2021-12-28 | Forming die of thin-wall fixed inner gear ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216632586U true CN216632586U (en) | 2022-05-31 |
Family
ID=81745753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123337440.0U Active CN216632586U (en) | 2021-12-28 | 2021-12-28 | Forming die of thin-wall fixed inner gear ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216632586U (en) |
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2021
- 2021-12-28 CN CN202123337440.0U patent/CN216632586U/en active Active
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