CN214922433U - Positioning fixture for machining thin-wall gear ring - Google Patents
Positioning fixture for machining thin-wall gear ring Download PDFInfo
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- CN214922433U CN214922433U CN202120861852.5U CN202120861852U CN214922433U CN 214922433 U CN214922433 U CN 214922433U CN 202120861852 U CN202120861852 U CN 202120861852U CN 214922433 U CN214922433 U CN 214922433U
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- gear ring
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Abstract
A positioning fixture for machining a thin-wall gear ring comprises a hydraulic mandrel, wherein one end of the hydraulic mandrel is a clamping end, and the other end of the hydraulic mandrel is an expansion shaft; the gear ring sleeve is further included, the inner hole is smooth, and the outer circle is provided with an outer gear ring; the inner hole is in sliding fit with the expansion shaft, and the outer gear ring is in clearance fit with the inner gear ring of the thin-wall gear ring; the gear ring sleeve is alternately provided with a forward groove and a reverse groove at equal intervals, the openings of the forward groove and the reverse groove are respectively provided with the left end and the right end of the gear ring sleeve, the forward groove and the reverse groove are parallel to the axis of the gear ring sleeve, and the length of the forward groove and the reverse groove is smaller than that of the gear ring sleeve. Because the gear ring sleeve which can be expanded simultaneously along with the hydraulic mandrel is arranged, the outer gear ring of the expanded gear ring sleeve is tightly meshed with the inner gear ring of the thin-wall gear ring to be processed, so that the thin-wall gear ring to be processed is firmly and uniformly clamped by the gear ring sleeve under stress, and the roundness in the thin-wall gear ring cannot be influenced. And through one-time clamping of the positioning reference A, the other parts of the thin-wall gear ring can be machined in a reference unified mode, and the machining precision of the thin-wall gear ring is guaranteed.
Description
Technical Field
The utility model belongs to a location frock specifically is a positioning fixture for processing thin wall ring gear.
Background
As shown in fig. 1 and 2, the thin-walled ring gear 1 includes a thin-walled cylindrical member and an end surface seat 5 vertically provided on an outer edge of one end of the cylindrical member. The front section of the inner wall of the cylindrical part is an inner gear ring 2, and the rear section is a smooth inner hole 3. The end seat 5 is located at one end of the bore 3. When the precision of the thin-wall gear ring 1 is measured, the reference circle of the inner gear ring 2 is taken as a reference A, and the end face of the end face seat 5 is taken as a reference B. The coaxiality of the bore 3 of the thin-wall gear ring 1 and the reference A is required to be 0.05, and the perpendicularity of the reference B relative to the reference A is required to be 0.025. However, the thin-walled gear ring 1 is extremely easy to deform in the machining process, so the detection requirements of finished parts do not easily reach the standard. The reason is that in the processing process of the existing thin-wall gear ring 1, if the gear blank is processed and then the tooth part is processed, the positioning processing can not be carried out through the inner hole 3 of the thin-wall gear ring 1, but only through the outer circle 4 of the thin-wall gear ring 1. Because the excircle 4 and the inner hole 3 are not clamped at one time, the conversion of reference positioning can cause the size of a product to be out of tolerance. If the machining process is changed, the reference A, namely the inner gear ring 2, needs to be machined firstly. After the machining is finished, the inner gear ring 2 is positioned to realize one-time clamping and finish the subsequent machining. However, in the conventional ring gear positioning jig, three points are selected on the circumference of the ring gear to perform positioning and clamping. Because the part to be processed is the thin-wall gear ring 1, if the part is positioned at three points, the part can deform, and after the clamp is removed after the part is processed, the roundness and other dimensions of the outer circle 4 of the gear ring can be influenced.
Therefore, in order to improve the machining precision of the thin-wall gear ring 1, a clamping tool which can be used for clamping once according to the same standard, is stressed uniformly and does not cause roundness deformation of parts needs to be designed.
Disclosure of Invention
In view of this, the utility model provides a positioning fixture for processing thin wall ring gear to the benchmark A of thin wall ring gear carries out a clamping, and applys even clamping-force to the thin wall ring gear, has avoided the deformation of part circularity.
The utility model adopts the technical proposal that: a positioning fixture for machining a thin-wall gear ring comprises a hydraulic mandrel, wherein one end of the hydraulic mandrel is a clamping end, and the other end of the hydraulic mandrel is an expansion shaft; the method is characterized in that: the gear ring is characterized by also comprising a gear ring sleeve, wherein the inner hole of the gear ring sleeve is smooth, and an outer ring is provided with an outer gear ring; the inner hole is in sliding fit with the expansion shaft, and the outer gear ring is in clearance fit with an inner gear ring of the thin-wall gear ring to be processed; the gear ring sleeve is provided with forward grooves and reverse grooves at equal intervals, the openings of the forward grooves and the reverse grooves are respectively arranged at the left end and the right end of the gear ring sleeve, the forward grooves and the reverse grooves are parallel to the axis of the gear ring sleeve, and the lengths of the forward grooves and the reverse grooves are smaller than that of the gear ring sleeve.
Further, the number of the forward grooves and the reverse grooves is 4.
Further, the length of the forward groove and the reverse groove is 80% of the length of the gear ring sleeve.
Further, the gap between the outer gear ring and the inner gear ring of the thin-wall gear ring to be processed is less than or equal to 0.1 mm.
Further, the expansion size of the expansion shaft is 0.1-0.3 mm.
The utility model has the advantages that: because the gear ring sleeve which can be expanded simultaneously along with the hydraulic mandrel is arranged, the outer gear ring of the expanded gear ring sleeve is tightly meshed with the inner gear ring of the thin-wall gear ring to be processed, so that the thin-wall gear ring to be processed is firmly and uniformly clamped by the gear ring sleeve under stress, and the roundness in the thin-wall gear ring cannot be influenced. And through one-time clamping of the positioning reference A, the other parts of the thin-wall gear ring can be machined in a reference unified mode, and the machining precision of the thin-wall gear ring is guaranteed.
Drawings
FIG. 1 is a schematic view of a thin-walled ring gear configuration.
FIG. 2 is a cross-sectional view of a thin-walled ring gear.
Fig. 3 is a schematic structural view of a hydraulic mandrel.
Fig. 4 is a structural schematic diagram of the tooth ring sleeve.
Fig. 5 is a cross-sectional view of the gear ring sleeve.
Fig. 6 is a schematic view of the usage state of the present invention.
In the figure: 1. the hydraulic expansion device comprises a thin-wall gear ring, 2 parts of an inner gear ring, 3 parts of an inner hole, 4 parts of an outer circle, 5 parts of an end face seat, 6 parts of a hydraulic mandrel, 7 parts of a clamping end, 8 parts of an expansion shaft, 9 parts of a gear ring sleeve, 10 parts of an outer gear ring, 11 parts of a forward groove, 12 parts of a reverse groove.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 3 to 6, the positioning fixture for machining the thin-walled gear ring comprises a hydraulic mandrel 6 and a gear ring sleeve 9. As shown in fig. 3, one end of the hydraulic mandrel 6 is a clamping end 7 for clamping by a lather; the other end is an expansion shaft 8, and the outer circle 4 of the expansion shaft 8 is expanded under the action of hydraulic expansion force. The expansion size of the excircle 4 of the expansion shaft 8 is 0.1-0.3 mm.
As shown in fig. 4 and 5, the inner hole of the gear ring sleeve 9 is smooth, and the outer circle 4 is provided with an outer gear ring 10. The outer gear ring 10 is in clearance fit with the inner gear ring 2 of the thin-wall gear ring 1, and the clearance is less than or equal to 0.1 mm. In the case that the expansion shaft 8 has no hydraulic expansion force, the inner hole of the gear ring sleeve 9 is in sliding fit with the outer circle 4 of the expansion shaft 8. When the expansion shaft 8 expands, the gear ring sleeve 9 is fastened on the outer circle 4 of the expansion shaft 8. In order to ensure that the gear ring sleeve 9 can be expanded, a forward groove 11 and a reverse groove 12 which are parallel to the axis of the gear ring sleeve 9 are formed in the gear ring sleeve 9, the opening of the forward groove 11 is arranged at the left end of the gear ring sleeve 9, and the opening of the reverse groove 12 is arranged at the right end of the gear ring sleeve 9. The forward grooves 11 and the reverse grooves 12 are alternately arranged at equal intervals, and 4 forward grooves 11 and 4 reverse grooves 12 can be respectively arranged. The length of the forward groove 11 and the reverse groove 12 is smaller than that of the gear ring sleeve 9. The length of the forward grooves 11 and the reverse grooves 12 is 80% of the length of the ring gear sleeve 9.
As shown in figure 6, when the utility model is used for clamping the thin-wall gear ring 1, the gear ring sleeve 9 is firstly sleeved on the expansion shaft 8 of the hydraulic mandrel 6, and then the inner gear ring 2 of the thin-wall gear ring 1 is meshed with the outer gear ring 10 of the gear ring sleeve 9. The hydraulic expansion force is applied to the hydraulic mandrel 6, so that the outer circle 4 of the expansion shaft 8 expands, the gear ring sleeve 9 and the expansion shaft 8 expand while being fastened, at the moment, the outer gear ring 10 of the gear ring sleeve 9 evenly and stably clamps the inner gear ring 2 of the thin-wall gear ring 1, and the clamping mode ensures that the roundness of the thin-wall gear ring 1 cannot be influenced. And through clamping the reference A once, the unified reference machining can be carried out on other parts of the thin-wall gear ring 1, and the machining precision of the thin-wall gear ring 1 is guaranteed.
Claims (5)
1. A positioning fixture for machining a thin-wall gear ring comprises a hydraulic mandrel, wherein one end of the hydraulic mandrel is a clamping end, and the other end of the hydraulic mandrel is an expansion shaft; the method is characterized in that: the gear ring is characterized by also comprising a gear ring sleeve, wherein the inner hole of the gear ring sleeve is smooth, and an outer ring is provided with an outer gear ring; the inner hole is in sliding fit with the expansion shaft, and the outer gear ring is in clearance fit with an inner gear ring of the thin-wall gear ring to be processed; the gear ring sleeve is provided with forward grooves and reverse grooves at equal intervals, the openings of the forward grooves and the reverse grooves are respectively arranged at the left end and the right end of the gear ring sleeve, the forward grooves and the reverse grooves are parallel to the axis of the gear ring sleeve, and the lengths of the forward grooves and the reverse grooves are smaller than that of the gear ring sleeve.
2. The positioning fixture for machining the thin-walled gear ring according to claim 1, wherein: the number of the forward grooves and the number of the reverse grooves are respectively 4.
3. The positioning fixture for machining the thin-walled gear ring according to claim 1, wherein: the length of the forward groove and the reverse groove is 80% of the length of the gear ring sleeve.
4. The positioning fixture for machining the thin-walled gear ring according to claim 1, wherein: and the clearance between the outer gear ring and the inner gear ring of the thin-wall gear ring to be processed is less than or equal to 0.1 mm.
5. The positioning fixture for machining the thin-walled gear ring according to claim 1, wherein: the expansion size of the expansion shaft is 0.1-0.3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120861852.5U CN214922433U (en) | 2021-04-25 | 2021-04-25 | Positioning fixture for machining thin-wall gear ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120861852.5U CN214922433U (en) | 2021-04-25 | 2021-04-25 | Positioning fixture for machining thin-wall gear ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214922433U true CN214922433U (en) | 2021-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120861852.5U Active CN214922433U (en) | 2021-04-25 | 2021-04-25 | Positioning fixture for machining thin-wall gear ring |
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| Country | Link |
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| CN (1) | CN214922433U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115255836A (en) * | 2022-08-15 | 2022-11-01 | 郑州机械研究所有限公司 | High-precision machining method for inner and outer annular thin-walled gear rings for high-speed planetary gear box |
-
2021
- 2021-04-25 CN CN202120861852.5U patent/CN214922433U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115255836A (en) * | 2022-08-15 | 2022-11-01 | 郑州机械研究所有限公司 | High-precision machining method for inner and outer annular thin-walled gear rings for high-speed planetary gear box |
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