Tool for lathing thin-wall ring piece
By designing a machining fixture for thin-walled ring parts and adopting a base block, circular positioning block, and pressure block structure, the problem of poor coaxiality of the stop point during machining of thin-walled ring parts was solved, thereby improving the production qualification rate and applicability.
Patent Information
- Application Number
- CN202422530060.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-18
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-10-18
AI Technical Summary
In the current thin-walled ring manufacturing process, the poor coaxiality of the two end stops leads to a high rate of production defects and easy deformation of the outer ring.
Design a machining fixture for thin-walled ring parts. The fixture adopts a base block, a circular positioning block and a pressure block structure, which is fixed to the spindle of a horizontal lathe by three bolts to achieve stable clamping of the thin-walled ring parts. The outer stop and the inner stop are precision machined to ensure coaxiality. The countersunk mounting hole and the groove structure facilitate drill bit avoidance and aluminum chip removal.
It improves the production qualification rate of thin-walled ring parts and the coaxiality of the machining of the two end stops, reduces the production defect rate, and is applicable to the machining of thin-walled ring parts of different sizes.
Smart Images
Figure CN223617293U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of geared motor manufacturing, specifically relating to a tooling for machining thin-walled ring parts. Background Technology
[0002] A thin-walled ring component 1' is used as a connecting transition component between a motor and a reducer. It is an existing thin-walled ring component manufactured by our company, such as... Figure 6 and Figure 7 As shown, it includes a thin-walled ring body. One end of the thin-walled ring body has an outer stop 2' and the other end has an inner stop 3'. The cross-section of the central through hole 4' in the thin-walled ring body is convex. The narrow opening of the central through hole 4' is located on the side of the outer stop 2', and the wide opening of the central through hole 4' is located on the side of the inner stop 3'. Four lugs 5' are equidistantly arranged on the outer circular surface of the thin-walled ring body. The upper end face of each lug 5' has a countersunk hole 6' and a through hole 7'. The countersunk hole 6' penetrates the upper and lower end faces of the lug 5', and the wide opening of the countersunk hole 6' is located on the side of the inner stop 3'. The through hole 7' penetrates the upper and lower end faces of the lug 5'. The production process of this thin-walled ring includes the fabrication of the thin-walled ring blank and the processing of the thin-walled ring blank. The thin-walled ring blank is formed by casting aluminum, and the cast aluminum thin-walled ring blank includes the central through hole 4'. The thin-walled ring blank is machined by milling an outer stop 2' at one end of the thin-walled ring body and an inner stop 3' at the other end. Countersunk holes 6' and through holes 7' are drilled on the lugs 5'. Previously, during the machining of the thin-walled ring blank, our company clamped the outer surface of the thin-walled ring blank using chucks on a lathe, and then first machined the outer stop 2' end (including finishing the outer stop 2' and the outer stop 2'). After the outer stop 2' is machined, the thin-walled ring blank is reversed and clamped to machine the inner stop 3' end (including the finishing of the inner stop 3' and the finishing of the hole on the side where the inner stop 3' is located). The thin-walled ring blank is clamped by the lathe jaws twice. This not only reduces the coaxiality of the machining of the two stops, but also increases the probability of deformation of the thin-walled ring due to the force on the outer ring, that is, increases the production defect rate of the thin-walled ring. Utility Model Content
[0003] Design objective: To overcome the shortcomings of the prior art, this paper designs a machining fixture for thin-walled ring parts that can not only improve the production qualification rate of thin-walled ring parts, but also improve the machining coaxiality of the two end stops, while having good performance and applicability.
[0004] Design scheme: To achieve the above design objectives.
[0005] 1. The upper end face of the base block is provided with a circular positioning block, the diameter of which matches the diameter of the orifice on the side where the outer stop is located in the thin-walled ring. The upper end face of the circular positioning block is provided with a threaded hole, the center line of which coincides with the center line of the circular positioning block. The threaded hole extends vertically downward to the base block. The upper end face of the base block is provided with two screw holes located outside the circular positioning block. The centers of the two screw holes are located on the circumference of the same circle, and the center of this circle coincides with the center of the circular positioning block. A positioning screw is screwed into each of the two screw holes. The upper end face of the circular pressure block is provided with a through-hole extending through both ends of the circular pressure block. The circular pressure block has a through hole, and the center line of symmetry of the circular pressure block coincides with the center line of symmetry of the through hole. The diameter of the circular pressure block is smaller than the diameter of the hole on the side where the inner stop is located in the thin-walled ring, and the diameter of the circular pressure block is larger than the diameter of the hole on the side where the outer stop is located in the thin-walled ring. The hole on the side where the outer stop is located in the thin-walled ring is inserted and fitted with the circular positioning block. After the two lugs in the thin-walled ring are respectively in contact with the corresponding positioning screws, the circular pressure block is placed in the central through hole of the thin-walled ring. The design of fixing the thin-walled ring on the circular positioning block by bolts after the circular pressure block through hole and the threaded hole are aligned is one of the technical features of this utility model. The purpose of this design is as follows: During use, a machining fixture for a thin-walled ring is fixedly mounted on the spindle of a horizontal lathe using three bolts. Before being installed into the fixture, the outer stop end of the thin-walled ring is machined (including finishing the outer stop and the hole on the side where the outer stop is located). Then, the hole on the side where the outer stop is located in the thin-walled ring is inserted into a circular locating block, and the two lugs in the thin-walled ring are respectively in contact with their corresponding locating screws. The circular pressure block is then placed in the central through hole of the thin-walled ring. After the through hole of the circular pressure block aligns with the threaded hole, the thin-walled ring is fixed in place by bolts, thus mounting the thin-walled ring onto the circular lathe spindle. On the positioning block, at this time, one of the lugs is located directly above the rectangular groove. Then, the horizontal lathe processes the inner stop end (including the finishing of the inner stop and the finishing of the hole on the side where the inner stop is located). After that, the horizontal lathe performs drilling operations on the thin-walled ring. Since the thin-walled ring is processed by clamping a tooling for machining thin-walled rings during the processing of the inner stop end and drilling, this not only reduces the coaxiality of the two ends of the stop (using a jig for one end of the stop is beneficial to ensure the coaxiality requirement of the two ends of the stop), but also increases the probability of the thin-walled ring deforming due to the force on the outer ring, thereby reducing the production defect rate of the thin-walled ring.
[0006] 2. The design of having three countersunk mounting holes on the upper end face of the base block, with the countersunk mounting holes penetrating both the upper and lower end faces of the base block, is the second technical feature of this utility model. The purpose of this design is that: with three countersunk mounting holes on the upper end face of the base block, and the countersunk mounting holes penetrating both the upper and lower end faces of the base block, this type of tooling for machining thin-walled ring parts can be fixedly mounted on a lathe by bolts.
[0007] 3. The design of having a circular groove on the lower end surface of the base block, with a depth of less than or equal to 6mm, is the third technical feature of this utility model. The purpose of this design is that the circular groove on the lower end surface of the base block, with a depth of less than or equal to 6mm, improves the flatness of the lower end surface of the base block.
[0008] 4. The design of having a rectangular groove on the upper surface of the base block, with one side of the rectangular groove extending outward and penetrating the outer wall of the base block, and the rectangular groove located directly below one of the lugs, is the fourth technical feature of this utility model. The purpose of this design is that the rectangular groove on the upper surface of the base block, with one side extending outward and penetrating the outer wall of the base block, and the rectangular groove located directly below one of the lugs, not only serves as a clearance groove for the drill bit when machining countersunk holes and through holes, but also facilitates the collection and cleaning of aluminum chips generated during drilling, thereby improving the usability of a tooling for machining thin-walled ring parts.
[0009] 5. The upper end face of the circular positioning block is provided with a circular positioning block 1, the diameter of the circular positioning block 1 is smaller than the diameter of the circular positioning block, and the symmetrical center line of the circular positioning block 1 coincides with the symmetrical center line of the circular positioning block. The upper end face of the base block is provided with two screw holes 1, and the two screw holes 1 are located on the outside of the circular positioning block. The center of the two screw holes 1 is located on the circumference of the same circle, and the center of the circle coincides with the center of the circular positioning block. This design is the fifth technical feature of this utility model. The purpose of this design is that: the upper end face of the circular positioning block is provided with a circular positioning block 1, the diameter of the circular positioning block 1 is smaller than the diameter of the circular positioning block, and the center line of symmetry of the circular positioning block 1 coincides with the center line of symmetry of the circular positioning block; the upper end face of the base block is provided with two screw holes 1, and the two screw holes 1 are located on the outer side of the circular positioning block; the center of the two screw holes 1 is located on the circumference of the same circle, and the center of the circle coincides with the center of the circular positioning block. This kind of machining fixture for thin-walled ring parts can process two different sizes of thin-walled ring parts, and its applicability is better.
[0010] Technical Solution: A machining fixture for thin-walled ring parts includes a base block and a circular pressure block. The upper surface of the base block has a circular positioning block, the diameter of which matches the diameter of the opening on the side of the outer stop in the thin-walled ring part. The upper surface of the circular positioning block has a threaded hole, the center line of which coincides with the center line of the circular positioning block. The threaded hole extends vertically downwards to the base block. The upper surface of the base block has two screw holes located outside the circular positioning block. The centers of the two screw holes are located on the circumference of the same circle, and the center of this circle coincides with the center of the circular positioning block. A positioning screw is screwed into each of the two screw holes. The upper end face of the circular pressure block is provided with a circular pressure block through hole that passes through both the upper and lower ends of the circular pressure block, and the symmetrical center line of the circular pressure block coincides with the symmetrical center line of the circular pressure block through hole. The diameter of the circular pressure block is smaller than the diameter of the hole on the side where the inner stop is located in the thin-walled ring and larger than the diameter of the hole on the side where the outer stop is located in the thin-walled ring. The hole on the side where the outer stop is located in the thin-walled ring is inserted and fitted with the circular positioning block, and the two lugs in the thin-walled ring are respectively in contact with the corresponding positioning screws. The circular pressure block is then placed in the central through hole of the thin-walled ring. After the circular pressure block through hole and the threaded hole are aligned, the thin-walled ring is installed on the circular positioning block by bolts.
[0011] Compared with the prior art, the present invention provides a machining fixture for thin-walled ring parts, which can not only improve the production qualification rate of thin-walled ring parts, but also improve the machining coaxiality of the two end stops. It has good performance and applicability. Attached Figure Description
[0012] Figure 1 This is a three-dimensional schematic diagram of a machining fixture for thin-walled ring parts (with the thin-walled ring parts to be machined clamped in place).
[0013] Figure 2 This is a top view schematic diagram of a tooling structure for machining thin-walled ring parts.
[0014] Figure 3 This is a top view schematic diagram of a machining tool for thin-walled ring parts (with the circular pressure block and bolts removed).
[0015] Figure 4 This is a bottom view schematic diagram of a machining tool for thin-walled ring parts (with the circular pressure block and bolts removed).
[0016] Figure 5 This is a bottom view schematic diagram of a machining tool for thin-walled ring parts (with an added circular positioning block).
[0017] Figure 6 This is a schematic diagram of the three-dimensional structure of a thin-walled ring in a top view.
[0018] Figure 7This is a schematic diagram of the three-dimensional structure of a thin-walled ring when viewed from below. Detailed Implementation
[0019] Example 1: Refer to Appendix Figures 1-4 A machining fixture for thin-walled ring parts includes a base block 1 and a circular pressure block 2. The upper surface of the base block 1 has a circular positioning block 3, the diameter of which matches the diameter of the opening on the side of the outer stop 2' in the thin-walled ring part 1'. The upper surface of the circular positioning block 3 has a threaded hole 4, the center line of which coincides with the center line of the circular positioning block 3. The threaded hole 4 extends vertically downwards to the base block 1. The upper surface of the base block 1 has two screw holes 5 located outside the circular positioning block 3. The centers of the two screw holes 5 are located on the circumference of the same circle, and the center of this circle coincides with the center of the circular positioning block 3. A positioning screw 6 is screwed into each of the two screw holes 5. The upper surface of the circular pressure block 2... The end face is provided with a circular pressure block through hole that passes through both the upper and lower ends of the circular pressure block 2, and the symmetrical center line of the circular pressure block 2 coincides with the symmetrical center line of the circular pressure block through hole. The diameter of the circular pressure block 2 is smaller than the diameter of the hole on the side where the inner stop 3' is located in the thin-walled ring 1' and larger than the diameter of the hole on the side where the outer stop 2' is located in the thin-walled ring 1'. The hole on the side where the outer stop 2' is located in the thin-walled ring 1' is inserted and matched with the circular positioning block 3. After the two lugs 5' in the thin-walled ring 1' respectively contact the corresponding positioning screws 6, the circular pressure block 2 is placed in the central through hole 4' of the thin-walled ring 1'. After the circular pressure block through hole and the threaded hole 4 are aligned, the thin-walled ring 1' is fixed by bolts 7 to install the thin-walled ring 1' on the circular positioning block 3.
[0020] The upper end face of the base block 1 is provided with three countersunk mounting holes 8, and the countersunk mounting holes 8 penetrate the upper and lower end faces of the base block 1. The lower end face of the base block 1 is provided with a circular groove 9, and the depth of the circular groove 9 is less than or equal to 6mm. The upper end face of the base block 1 is provided with a rectangular groove 10, and one side of the rectangular groove 10 extends outward and penetrates the outer wall surface of the base block 1. The rectangular groove 10 is located directly below one of the lugs 5'.
[0021] In use, a machining fixture for thin-walled ring parts is fixedly mounted on the spindle of a horizontal lathe using three bolts. Before being installed into the machining fixture, the thin-walled ring part is first machined at its outer stop 2' end (including finishing machining of the outer stop 2' and the hole on the side where the outer stop 2' is located). Then, the hole on the side where the outer stop 2' is located in the thin-walled ring part 1' is inserted and engaged with the circular positioning block 3, and the two lugs 5' in the thin-walled ring part 1' respectively contact the corresponding positioning screws 6. Then, the circular pressure block 2 is placed in the central through hole 4' of the thin-walled ring 1'. After the circular pressure block 2 is aligned with the threaded hole 4, the thin-walled ring 1' is fixed by bolts 7 to install it on the circular positioning block 3. At this time, one of the lugs 5' is located directly above the rectangular groove 10. Then, the horizontal lathe processes the end of the inner stop 3' (including the finishing of the inner stop 3' and the finishing of the hole on the side where the inner stop 3' is located). Then, the horizontal lathe performs drilling operations on the thin-walled ring.
[0022] Example 2: Based on Example 1, refer to Appendix Figure 5 The upper surface of the circular positioning block 3 is provided with a circular positioning block 11. The diameter of the circular positioning block 11 is smaller than the diameter of the circular positioning block 3, and the center line of symmetry of the circular positioning block 11 coincides with the center line of symmetry of the circular positioning block 3. The upper surface of the base block 1 is provided with two screw holes 12, which are located outside the circular positioning block 3. The centers of the two screw holes 12 are located on the circumference of the same circle, and the center of the circle coincides with the center of the circular positioning block 3. It also includes another circular pressure block 2, the diameter of which matches the corresponding thin-walled ring blank to be processed. Due to the setting of the circular positioning block 3 and the circular positioning block 11, this kind of tooling for machining thin-walled rings can process two different sizes of thin-walled rings.
[0023] It should be understood that although the above embodiments provide a relatively detailed textual description of the design concept of this utility model, these textual descriptions are merely simple textual descriptions of the design concept of this utility model, and not limitations on the design concept of this utility model. Any combination, addition, or modification that does not exceed the design concept of this utility model shall fall within the protection scope of this utility model.
Claims
1. A machining fixture for thin-walled ring parts, comprising a base block (1) and a circular pressure block (2), characterized in that: The upper end face of the base block (1) is provided with a circular positioning block (3), and the diameter of the circular positioning block (3) matches the diameter of the hole on the side where the outer stop (2') of the thin-walled ring (1') is located. The upper end face of the circular positioning block (3) is provided with a threaded hole (4), and the center line of the threaded hole (4) coincides with the center line of the circular positioning block (3). The threaded hole (4) extends vertically downward to the base block (1). The upper end face of the base block (1) is provided with two screw holes (5), and the two screw holes (5) are located outside the circular positioning block (3). The centers of the two screw holes (5) are located on the circumference of the same circle, and the center of the circle coincides with the center of the circular positioning block (3). A positioning screw (6) is screwed into each of the two screw holes (5). The upper end face of the circular pressure block (2) is provided with a through-circular pressure block (2). The circular pressure block through holes on both lower end faces and the symmetrical center line of the circular pressure block (2) coincides with the symmetrical center line of the circular pressure block through hole. The diameter of the circular pressure block (2) is smaller than the diameter of the hole on the side where the inner stop (3') is located in the thin-walled ring (1') and the diameter of the circular pressure block (2) is larger than the diameter of the hole on the side where the outer stop (2') is located in the thin-walled ring (1'). The hole on the side where the outer stop (2') is located in the thin-walled ring (1') is inserted and matched with the circular positioning block (3). After the two lugs (5') in the thin-walled ring (1') respectively contact the corresponding positioning screws (6), the circular pressure block (2) is placed in the central through hole (4') of the thin-walled ring (1'). After the circular pressure block (2) is connected with the threaded hole (4), the thin-walled ring (1') is fixed by bolts (7) and the thin-walled ring (1') is installed on the circular positioning block (3).
2. The machining fixture for thin-walled ring parts according to claim 1, characterized in that: The upper end face of the base block (1) is provided with three countersunk mounting holes (8), and the countersunk mounting holes (8) penetrate the upper and lower end faces of the base block (1).
3. The machining fixture for thin-walled ring parts according to claim 1, characterized in that: The lower end face of the base block (1) is provided with a circular groove (9) and the depth of the circular groove (9) is less than or equal to 6 mm.
4. The machining fixture for thin-walled ring parts according to claim 1, characterized in that: The upper surface of the base block (1) is provided with a rectangular groove (10), and one side of the rectangular groove (10) extends outward and penetrates the outer wall surface of the base block (1). The rectangular groove (10) is located directly below one of the lugs (5').
5. The machining fixture for thin-walled ring parts according to claim 1, characterized in that: The upper end face of the circular positioning block (3) is provided with a circular positioning block one (11). The diameter of the circular positioning block one (11) is smaller than the diameter of the circular positioning block (3), and the center line of symmetry of the circular positioning block one (11) coincides with the center line of symmetry of the circular positioning block (3). The upper end face of the base block (1) is provided with two screw holes one (12), and the two screw holes one (12) are located outside the circular positioning block (3). The center of the two screw holes one (12) is located on the circumference of the same circle, and the center of the circle coincides with the center of the circular positioning block (3).