Stepped drilling reamer for machining planet carrier segment difference hole
By designing a step drilling reamer that includes thick drill bits, expansion stages and fine hinge stages, the positioning error problem when processing planetary frame segments is solved, efficient and low-cost hole processing effect is achieved, and the quality and coaxiality of the hole wall are improved.
Patent Information
- Application Number
- CN202421691271.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-07-17
AI Technical Summary
In the prior art, when processing planetary frame segments, positioning errors occur when changing the tool, resulting in low quality and efficiency of hole processing and high cost.
A step drilling reamer is used to process planetary frame segment difference holes, including thick drill bits, expansion stages and fine hinge stages. The margin is uniformly removed and position accuracy is corrected through multi-step design, and the support blade belt is combined to ensure coaxiality and stability, avoid tool change errors.
Improves hole processing efficiency and quality, reduces costs, and enhances tool stability and coaxial requirements of hole walls.
Smart Images
Figure CN223056771U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of processing stepped holes of a planetary carrier, in particular to a stepped drill reamer for processing stepped holes of a planetary carrier. Background Art
[0002] When processing the stepped holes of a planetary carrier, for the conventional process, first use a drill bit for rough drilling, and then use a reamer for finish machining. This set of solutions has a high cost, and positioning errors may occur during tool change, resulting in problems such as coaxiality deviation in the subsequent reaming of the hole, affecting the hole processing quality and efficiency, and also affecting the tool service life.
[0003] In the prior art, in order to solve the problems of ordinary processes and tools in processing holes of such high - requirement stepped - hole parts, it is necessary to ensure the consistency, accuracy of part feature processing, as well as the hole wall quality, processing rhythm and tool cost. Summary of the Utility Model
[0004] The utility model mainly provides a stepped drill reamer for processing stepped holes of a planetary carrier, which has high processing efficiency and improves the hole wall quality.
[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a stepped drill reamer for processing stepped holes of a planetary carrier, including a composite drill body, a rough drill bit is arranged on one side of the outer wall of the composite drill body, a step - expanding stage is arranged on one side of the outer wall of the composite drill body, a finish - reaming stage is arranged on one side of the outer wall of the composite drill body, and a support cutting edge band is fixedly installed on the outer surface wall of the composite drill body.
[0006] Preferably, one side of the outer wall of the step - expanding stage is behind the rough drill bit. The stepped drill reamer first passes through the rough drill bit of the first step to leave a margin for subsequent finish machining, and then through the action of the second - step step - expanding stage, it plays a role in correcting the position degree of the first - step rough drilling and uniformly removing the margin to ensure the quality of subsequent finish machining.
[0007] Preferably, one side of the outer wall of the finish - reaming stage is behind the step - expanding stage. After passing through the second - step step - expanding stage, it then passes through the third - step finish - reaming stage, ensuring the processing quality of the hole wall and meeting the dimensional requirements of the hole diameter.
[0008] Preferably, one side of the outer wall of the support cutting edge band is behind the finish - reaming stage. Through the action of the support cutting edge band and combined with the design of the support cutting edge band, it ensures the coaxiality requirement between stepped holes and also plays a stabilizing role to avoid vibration of the tool. The position of the support band ensures that the third step has been supported when entering the first breakthrough hole.
[0009] Preferably, the width of the rough drill bit is D1, and the depth of the rough drill bit is L1.
[0010] Preferably, the width of the expanding stage is D2, and the depth of the expanding stage is L2.
[0011] Preferably, the width of the fine reaming stage is D3, and the length of the fine reaming stage is L3.
[0012] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:
[0013] 1. In the present utility model, the rough drill bit is the first-stage rough drill, the expanding stage is the second-stage expansion, and the fine reaming stage is the third-stage fine reaming. Thus, by using the first-stage rough drill and the second-stage expansion, the allowance can be evenly removed and the position accuracy can be corrected. Then, through the third-stage fine reaming with a composite tool, the positioning error caused by tool changing can be avoided, thereby improving the hole processing efficiency and quality, reducing costs, and combining with the rear support cutting edge band to better provide the stability of tool processing, thus improving the use effect of the stepped drill reamer for processing the stepped holes of the planet carrier. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 FIG. 1 is a front view of a stepped drill reamer for processing stepped holes of a planet carrier proposed by the present utility model;
[0015] Figure 2 FIG. 2 is a left view of a stepped drill reamer for processing stepped holes of a planet carrier proposed by the present utility model;
[0016] Figure 3 FIG. 3 is a right view of a stepped drill reamer for processing stepped holes of a planet carrier proposed by the present utility model;
[0017] Figure 4 FIG. 4 is a dimensional schematic diagram of a stepped drill reamer for processing stepped holes of a planet carrier proposed by the present utility model.
[0018] LEGEND DESCRIPTION:
[0019] 1. Composite drill body; 2. Rough drill bit; 3. Expanding stage; 4. Fine reaming stage; 5. Support cutting edge band. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0020] In order to more clearly understand the above objects, features, and advantages of the present utility model, the following further describes the present utility model with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.
[0021] In the following description, many specific details are set forth to fully understand the present utility model. However, the present utility model may be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.
[0022] Please refer toFigures 1-4 , the present utility model provides a technical solution: a stepped drill reamer for processing the stepped holes of a planetary carrier, which includes a composite drill body 1. A rough drill bit 2 is arranged on one side of the outer wall of the composite drill body 1, an expansion stage 3 is arranged on one side of the outer wall of the composite drill body 1, a fine reaming stage 4 is arranged on one side of the outer wall of the composite drill body 1, and a support cutting edge band 5 is fixedly installed on the outer surface wall of the composite drill body 1.
[0023] As Figure 1 、 Figure 2 and Figure 4 shown, one side of the outer wall of the expansion stage 3 is behind the rough drill bit 2 of the first step. This stepped drill reamer first passes through the rough drill bit 2 of the first step to leave a margin for subsequent finish machining. Then, through the action of the second-step expansion stage 3, it corrects the position accuracy of the first-step rough drilling and evenly removes the margin to ensure the quality of subsequent finish machining.
[0024] As Figure 1 and Figure 4 shown, one side of the outer wall of the fine reaming stage 4 is behind the expansion stage 3. When passing through the second-step expansion stage 3, and then through the third-step fine reaming stage 4, it ensures the machining quality of the hole wall and meets the dimensional requirements of the hole diameter.
[0025] As Figure 1 and Figure 4 shown, one side of the outer wall of the support cutting edge band 5 is behind the fine reaming stage 4. Through the action of the support cutting edge band 5 and combined with the design of the support cutting edge band 5, it ensures the coaxiality requirement between the stepped holes and also plays a stabilizing role to avoid chatter. Among them, the position of the support cutting edge band 5 ensures that it has been supported when the third step enters the first broken hole.
[0026] As Figure 1 、 Figure 2 and Figure 4 shown, the width of the rough drill bit 2 is D1, and the depth of the rough drill bit 2 is L1.
[0027] As Figure 1 and Figure 4 shown, the width of the expansion stage 3 is D2, and the depth of the expansion stage 3 is L2.
[0028] As Figure 1 and Figure 4 shown, the width of the fine reaming stage 4 is D3, and the length of the fine reaming stage 4 is L3.
[0029] The usage method and working principle of this device: First, the rough drill bit 2 is the first-step rough drilling, the expansion stage 3 is the second-step expansion, and the fine reaming stage 4 is the third-step fine reaming. Then as Figure 4As shown, the width of the rough drill bit 2 is D1, the depth of the rough drill bit 2 is L1, the hole diameter - D1 = 0.3 mm, the width of the expansion stage 3 is D2, the depth of the expansion stage 3 is L2, D3 - D2 = 0.01, and then the width of the finish reaming stage 4 is D3, and the length of the finish reaming stage 4 is L3. Thus, through the action of the first-step rough drill bit 2, a margin is left for subsequent finish machining. Then, through the action of the second-step expansion stage 3, the margin can be evenly removed and the position accuracy can be corrected. Finally, through the action of the third-step finish reaming stage 4, not only the quality of the hole wall machining is ensured, but also the requirements for the hole diameter size are met. Combining with the design of the support cutting edge band 5, the coaxiality requirement between the stepped holes is ensured and it also plays a stabilizing role to avoid chatter. Among them, the position of the support cutting edge band 5 ensures that the third-step finish reaming stage 4 is supported when it enters the first broken hole. Thus, by using the first-step rough drill bit 2 and the second-step expansion stage 3 to evenly remove the margin and correct the position accuracy, and combining the third-step finish reaming stage 4 into one tool to avoid the positioning error caused by tool change, the hole machining efficiency and quality are improved, the cost is reduced, and combining with the rear support cutting edge band 5 better provides the stability of tool machining, thereby improving the use effect of the stepped drill reamer for machining the stepped holes of the planet carrier.
[0030] The above is only a preferred embodiment of the present invention, and it is not a limitation to the present invention in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims
1. A stepped drill reamer for machining the stepped hole of a planetary carrier, comprising a composite drill body (1), characterized in that: On one side of the outer wall of the composite drill body (1), a rough drill bit (2) is provided. On one side of the outer wall of the composite drill body (1), an expansion stage (3) is provided. On one side of the outer wall of the composite drill body (1), a finish reaming stage (4) is provided. A support land (5) is fixedly installed on the outer surface wall of the composite drill body (1).
2. The stepped drill reamer for machining the step hole of the planet carrier according to claim 1, characterized in that: On one side of the outer wall of the expansion stage (3) is behind the rough drill bit (2).
3. The stepped drill reamer for machining the step hole of the planet carrier according to claim 1, wherein: On one side of the outer wall of the finish reaming stage (4) is behind the expansion stage (3).
4. A stepped drill reamer for machining the stepped hole of a planet carrier according to claim 1, characterized in that: On one side of the outer wall of the support land (5) is behind the finish reaming stage (4).
5. A stepped drill reamer for machining the stepped hole of a planetary carrier according to claim 2, characterized in that: The width of the rough drill bit (2) is D1, and the depth of the rough drill bit (2) is L1.
6. A stepped drill reamer for machining the stepped hole of a planet carrier according to claim 2, characterized in that: The width of the expansion stage (3) is D2, and the depth of the expansion stage (3) is L2.
7. A stepped drill reamer for machining the stepped hole of a planetary carrier according to claim 3, characterized in that: The width of the finish reaming stage (4) is D3, and the length of the finish reaming stage (4) is L3.