Ejector pin type special lathe for rotor machining

Abstract

The invention relates to the technical field of rotor machining, in particular to an ejector pin type special lathe for rotor machining. Comprising an ejector pin device, a supporting device and a turning device. The ejector pin devices are erected on the two sides of the supporting device. The turning device corresponds to the supporting device; the supporting device is used for supporting a to-be-machined rotor; the supporting device comprises a supporting roller, a transmission structure and a power motor; the supporting roller is arranged on the side, close to the ground, of the rotor. The supporting roller can be attached to the side wall of the rotor; the power motor is in transmission connection with the supporting roller through a transmission structure so as to drive the supporting roller to slide in the radial direction of the rotor. In the prior art, a rotor has the characteristic that the middle is heavy and the two ends are light, so that in the machining process of the rotor, the influence of gravity center change can be amplified in high-speed rotation, the clamping burden of an ejector pin type lathe is large, and the machining precision is influenced. Compared with the prior art, a rotor can be effectively supported, so that the clamping burden is relieved, and the machining precision is improved to a certain degree.

Description

Technical Field

[0001] The present invention relates to the technical field of rotor processing, in particular to a special-purpose thimble-type lathe for rotor processing. Background Art

[0002] The ejector-type lathe is a common metalworking machine tool, primarily used for machining shaft parts. Its characteristic feature is that the workpiece is secured by two front and rear ejectors, ensuring stability and precision during rotation. The front ejector is mounted on the spindle and rotates with it, while the rear ejector is fixed to the tailstock for support. This structure is suitable for processes such as turning, drilling, and tapping long shaft parts. Ejector-type lathes offer excellent rigidity and high machining accuracy. Therefore, they are often used for machining rotor surfaces.

[0003] Due to its inherent structure, the rotor has a smaller diameter and lighter weight at both ends, while the middle diameter and weight are larger. However, when machining the rotor, a thimble-type lathe must maintain continuous rotation. Due to the rotor's weight distribution, this places a heavy clamping burden on the thimble-type lathe during machining, resulting in uncontrollable errors during the clamping process, affecting the final machining accuracy. Summary of the Invention

[0004] In view of the technical problems of the prior art, the present invention provides a special-purpose thimble-type lathe for machining rotors.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A special-purpose thimble-type lathe for rotor processing comprises: an thimble device, a support device, and a turning device; the thimble device is mounted on both sides of the support device; the turning device corresponds to the support device; the support device is used to support the rotor to be processed; the support device comprises a support roller, a transmission structure, and a power motor; the support roller is arranged on the side of the rotor close to the ground; the support roller can fit against the side wall of the rotor; the power motor is connected to the support roller through the transmission structure to drive the support roller to slide along the radial direction of the rotor.

[0007] Furthermore, the number of the support rollers is three; the support rollers are arranged along the circumference of the rotor.

[0008] Furthermore, the support roller includes a roller shaft and an assembly block; the assembly block is arranged on the side of the rotor close to the ground; the assembly block is arranged along the radial direction of the rotor; the roller shaft is rotatably arranged at one end of the assembly block close to the rotor.

[0009] Furthermore, the transmission structure includes a power gear, a transmission rack, a track rack, and an output gear; the output gear is connected to the output end of the power motor; the power gear corresponds to the support roller; the transmission rack is meshed with the output gear and the power gear; the track rack is arranged on one side of the support roller; the track rack is arranged along the radial direction of the rotor; and the track rack is meshed with the power gear.

[0010] Furthermore, slide rails are provided on the transmission rack and the track rack.

[0011] Furthermore, the power gear includes a main power gear; the transmission rack includes a main transmission rack; the track rack includes a main track rack; the main power gear is rotatably connected to the support roller; the main transmission rack is meshed with the main power gear and the output gear; the main transmission rack is parallel to the main track rack; the main track rack is arranged along the radial direction of the rotor; and the main track rack is meshed with the main power gear.

[0012] Furthermore, the power gear includes a side power gear; the transmission rack includes a side transmission rack; the track rack includes a side track rack; the side power gear corresponds to the support roller; the side transmission rack is meshed with the side power gear and the output gear; an angle is set between the side transmission rack and the side track rack; the side track rack is arranged along the radial direction of the rotor; and the side track rack is meshed with the side power gear.

[0013] Furthermore, there are two side transmission racks; an angle is set between the side transmission racks; and the side transmission racks are respectively arranged on the upper and lower sides of the output gear.

[0014] Furthermore, it also includes an assembly shell; a cavity for accommodating the support device is opened in the assembly shell; and the support roller protrudes from the assembly shell.

[0015] Furthermore, a groove is provided on the assembly shell; the groove is arc-shaped; and the groove corresponds to the rotor.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] During the rotor machining process, the rotor in a rotating state can be effectively supported, thereby alleviating the adverse effects of the rotor weight distribution on the machining accuracy to a certain extent.

[0018] When the rotor diameter changes, the power motor is activated, driving the support rollers to move synchronously along the rotor's radial direction at the same speed. During this movement, the support rollers maintain their position along the same arc. This allows the present invention to accommodate rotors of any diameter within a specified range, significantly expanding its scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1: Overall structure diagram.

[0020] Figure 2 : Front view of the overall structure.

[0021] Figure 3 : Overall internal structure diagram of the support device.

[0022] Figure 4 : Internal side view of the support device.

[0023] Figure 5 : Schematic diagram of the main power gear.

[0024] Figure 6 : Schematic diagram of the matching relationship of support roller A.

[0025] Figure 7 : Schematic diagram of the matching relationship of support roller B.

[0026] Figure 8 : Schematic diagram of the transmission structure operating status.

[0027] In the figure: 1. ejector device; 2. supporting device; 21. supporting roller; 22. transmission structure; 23. power motor; 211. roller shaft; 212. assembly block; 221. power gear; 222. transmission rack; 223. track rack; 224. output gear; 2211. main power gear; 2221. main transmission rack; 2231. main track rack; 2212. side power gear; 2222. side transmission rack; 2232. side track rack; 3. turning device; 4. assembly shell; 41. groove. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0029] A special-purpose rotor machining thimble-type lathe comprises: an thimble device 1, a support device 2, a turning device 3, and an assembly housing 4. The assembly housing 4 defines a cavity for accommodating the support device 2. The assembly housing 4 defines a groove 41. The groove 41 is arc-shaped. The groove 41 corresponds to the rotor. Specifically, the diameter of the groove 41 corresponds to the diameter of the largest rotor that can be supported. The thimble device 1 is mounted on both sides of the support device 2. The turning device 3 corresponds to the support device 2.

[0030] The support device 2 is used to support the rotor to be processed. The support device 2 includes a support roller 21, a transmission structure 22, and a power motor 23. The support roller 21 protrudes from the assembly shell 4. There are three support rollers 21. The support rollers 21 are arranged along the circumference of the rotor. The support roller 21 includes a roller shaft 211 and an assembly block 212. The assembly block 212 is arranged on the side of the rotor close to the ground. The assembly block 212 is arranged along the radial direction of the rotor. The roller shaft 211 is rotatably arranged at one end of the assembly block 212 close to the rotor. A slide rail is also provided on the assembly block 212, and a slide groove matching the slide rail is provided in the assembly shell 4 so that the assembly block 212 can slide along the radial direction of the rotor.

[0031] The transmission structure 22 includes a power gear 221, a transmission rack 222, a track rack 223, and an output gear 224. The output gear 224 is connected to the output end of the power motor 23. The power gear 221 corresponds to the support roller 21. The transmission rack 222 meshes with the output gear 224 and the power gear 221. The track rack 223 is arranged on one side of the support roller 21. The track rack 223 is arranged along the radial direction of the rotor. The track rack 223 meshes with the power gear 221. Slide rails are provided on the transmission rack 222 and the track rack 223. At the same time, a slide groove corresponding to the aforementioned slide rail is provided in the assembly housing 4 to enable the transmission rack 222 and the track rack 223 to slide along a specified direction.

[0032] Specifically, the power gear 221 includes a main power gear 2211. The transmission rack 222 includes a main transmission rack 2221. The track rack 223 includes a main track rack 2231. The main power gear 2211 is rotatably connected to the support roller 21. The main transmission rack 2221 meshes with the main power gear 2211 and the output gear 224. The main transmission rack 2221 is parallel to the main track rack 2231. The main track rack 2231 is arranged radially along the rotor. The main track rack 2231 meshes with the main power gear 2211.

[0033] The power gear 221 includes a side power gear 2212. The transmission rack 222 includes a side transmission rack 2222. The track rack 223 includes a side track rack 2232. The side power gear 2212 corresponds to the support roller 21. The side transmission rack 2222 meshes with the side power gear 2212 and the output gear 224. An angle is set between the side transmission rack 2222 and the side track rack 223. The side track rack 2232 is arranged along the radial direction of the rotor. The side track rack 2232 meshes with the side power gear 2212. There are two side transmission racks 2222. An angle is set between the side transmission racks 2222. The side transmission racks 2222 are respectively arranged on the upper and lower sides of the output gear 224. It is worth noting that the diameter of the power gear 221 is equal to the diameter of the output gear 224.

[0034] In the default state, as shown in the accompanying drawings, the rotor diameter carried is the maximum value that the present invention can carry.

[0035] When the rotor diameter reaches the maximum capacity supported by the present invention, the rotor to be processed can be placed directly into the groove 41 of the assembly housing 4. At this point, the rotor's sidewalls are in contact with the roller shaft 211 of the support roller 21. Once the rotor is stabilized, the ejector assembly 1 is activated, allowing the ejector pins to clamp the rotor. Subsequently, the turning assembly 3 is activated, and the turning assembly 3 processes the rotor's sidewalls. During the machining process, the rotor continuously rotates, driven by the ejector assembly 1, allowing the turning tool of the turning assembly 3 to cut specific areas of the rotor. Meanwhile, as the rotor rotates, the roller shaft 211 rotates synchronously due to the friction between the two. Because the rotor is already a cylindrical structure that does not meet product specifications before machining, its center of gravity is offset (not aligned with the rotor's axis). The machining process removes material from the rotor, further shifting the center of gravity. The impact of this shift is amplified when the rotor is continuously rotating and the weight of the central region is greater. The present invention effectively supports the rotor through the support roller 21, thereby effectively alleviating the aforementioned influence and further improving the processing accuracy to a certain extent.

[0036] When the diameter of the rotor to be machined is smaller than the diameter of groove 41, the rotor is placed in a position corresponding to groove 41 in the assembly housing 4. Due to the rotor's smaller diameter, the rotor axis does not coincide with the axis of the ejector pin on the ejector assembly 1. Once the rotor is stabilized, the power motor 23 of the support assembly 2 is started. From the perspective shown in the accompanying drawings, the output shaft of the power motor 23 rotates clockwise. Driven by the power motor 23, the output gear 224 continuously rotates. This causes the output gear 224 to slide vertically upward, which in turn, through the main rail rack 2231, synchronously drives the main power gear 2211 to rotate clockwise. Because the main power gear 2211 is rotatably connected to the support roller 21, which is fixedly mounted within the assembly housing 4, the clockwise rotation of the main power gear 2211 synchronously drives the support roller 21 upward along the main rail rack 2231. Wherein, the main track rack 2231 is arranged along the radial direction of the rotor, and the corresponding support roller 21 will gradually move toward the center of the rotor.

[0037] For ease of description, the support roller 21 on the left side of the drawing will be referred to as support roller A, and the support roller 21 on the right side of the drawing will be referred to as support roller B. When the output gear 224 rotates, the corresponding side drive rack 2222 will be synchronously driven to slide in the direction from the side power gear 2212 to the output gear 224. When the side drive rack 2222 slides, it will synchronously drive the corresponding side power gear 2212 to rotate counterclockwise. Because the side power gear 2212 is rotatably mounted within the assembly housing 4, and the side track rack 2232 is fixedly connected to support roller A, counterclockwise rotation of the corresponding side power gear 2212 will synchronously drive the side track rack 2232 to slide. The side track rack 2232 is positioned radially along the rotor. Consequently, the side track rack 2232 will drive support roller A toward the center of the rotor.

[0038] For support roller B, because the two side drive racks 2222 are located above and below the output gear 224, when the output gear 224 rotates, it can also drive the corresponding side drive rack 2222 to slide in the direction from the side power gear 2212 to the output gear 224. When the side drive rack 2222 slides, it simultaneously drives the corresponding side power gear 2212 to rotate clockwise. Because the corresponding side power gear 2212 is rotatably mounted within the assembly housing 4, and the side track rack 2232 is fixedly connected to support roller B, when the corresponding side power gear 2212 rotates clockwise, it simultaneously drives the side track rack 2232 to slide. The side track rack 2232 is arranged radially along the rotor. Consequently, the side track rack 2232 drives support roller B toward the center of the rotor.

[0039] In summary, when the power motor 23 drives the output gear 224 to rotate, it will synchronously drive the three support rollers 21 to slide along the radial direction of the rotor. The diameter of the output gear 224 is equal to the diameter of the main power gear 2211 and the side power gear 2212. The moving speed of the three support rollers 21 is the same. Therefore, when the three support rollers 21 move, the roller shafts 211 on the three support rollers 21 are always located on the same arc. During the movement of the support rollers 21, the support rollers 21 will push the rotor. When the support rollers 21 move to the specified position, the axis of the rotor coincides with the axis of the ejector of the ejector device 1. At this time, the ejector device 1 can be started to support the rotor. Subsequently, during the turning process of the turning device 3, the support rollers 21 can effectively support the rotor.

[0040] When it is necessary to match a rotor with a larger diameter again, the power motor 23 can be controlled to rotate in the opposite direction. Thus, the position of the roller 211 can be adjusted arbitrarily within a set range, thereby effectively adapting to rotors of different diameters.

[0041] It is worth noting that the control method of the power motor 23 of the present invention can be in the following form: since the power motor 23 always maintains a uniform speed during operation, and the operating parameters of the power motor 23 are known values, the moving distance of the support roller 21 per unit time, that is, the movement speed of the support roller 21 is a known value. On the other hand, the diameter of the rotor to be processed is a known value. The maximum diameter of the rotor that the present invention can support is a known value, and the difference between the two can be obtained. The difference is the distance that the support roller 21 needs to move starting from the aforementioned default state. In summary, the speed is known, and the distance required to move is known, so the time required for the power motor 23 to run can be calculated. Therefore, by controlling the running time of the power motor 23, the support roller 21 can be controlled to match rotors of different diameters. Other control processes can be implemented using existing technologies and will not be described here.

[0042] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0043] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0044] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A special-purpose thimble-type lathe for rotor machining, characterized in that: include: Ejector device (1), supporting device (2), turning device (3); The ejector device (1) is mounted on both sides of the supporting device (2); The turning device (3) corresponds to the supporting device (2); The supporting device (2) is used to support the rotor to be processed; The supporting device (2) comprises a supporting roller (21), a transmission structure (22), and a power motor (23); The support roller (21) is arranged on a side of the rotor close to the ground; The support roller (21) is capable of fitting with the side wall of the rotor; The power motor (23) is connected to the support roller (21) through the transmission structure (22) to drive the support roller (21) to slide along the radial direction of the rotor.

2. The rotor machining thimble-type special lathe according to claim 1, characterized in that: The number of the support rollers (21) is three; The supporting roller (21) is arranged along the circumference of the rotor.

3. The rotor machining thimble-type special lathe according to claim 2, characterized in that: The supporting roller (21) comprises a roller shaft (211) and an assembly block (212); The assembly block (212) is arranged on a side of the rotor close to the ground; The assembly block (212) is arranged along the radial direction of the rotor; The roller shaft (211) is rotatably arranged on one end of the assembly block (212) close to the rotor.

4. The rotor machining thimble-type special lathe according to claim 1, characterized in that: The transmission structure (22) includes a power gear (221), a transmission rack (222), a track rack (223), and an output gear (224); The output gear (224) is connected to the output end of the power motor (23); The power gear (221) corresponds to the support roller (21); The transmission rack (222) is meshed with the output gear (224) and the power gear (221); The track rack (223) is arranged on one side of the support roller (21); The track rack (223) is arranged along the radial direction of the rotor; The track rack (223) is meshed with the power gear (221).

5. The rotor machining thimble-type special lathe according to claim 4, characterized in that: Slide rails are provided on the transmission rack (222) and the track rack (223).

6. The rotor machining thimble-type special lathe according to claim 4, characterized in that: The power gear (221) includes a main power gear (2211); The transmission rack (222) includes a main transmission rack (2221); The track rack (223) includes a main track rack (2231); The main power gear (2211) is rotatably connected to the support roller (21); The main transmission rack (2221) is meshed with the main power gear (2211) and the output gear (224); The main transmission rack (2221) is parallel to the main track rack (2231); The main track rack (2231) is arranged along the radial direction of the rotor; The main track rack (2231) is meshed with the main power gear (2211).

7. The rotor machining thimble-type special lathe according to claim 4, characterized in that: The power gear (221) includes a side power gear (2212); The transmission rack (222) includes a side transmission rack (2222); The track rack (223) includes a side track rack (2232); The side power gear (2212) corresponds to the support roller (21); The side transmission rack (2222) is meshed with the side power gear (2212) and the output gear (224); An included angle is provided between the side transmission rack (2222) and the side track rack (223); The side track rack (2232) is arranged along the radial direction of the rotor; The side track rack (2232) is meshed with the side power gear (2212).

8. The rotor machining thimble-type special lathe according to claim 6, characterized in that: The number of the side transmission racks (2222) is two; An angle is set between the side transmission racks (2222); The side transmission racks (2222) are respectively arranged on the upper and lower sides of the output gear (224).

9. The rotor machining thimble-type special lathe according to any one of claims 1 to 8, characterized in that: Also included is an assembly housing (4); A cavity for accommodating the supporting device (2) is provided in the assembly housing (4); The supporting roller (21) protrudes from the assembly shell (4).

10. The rotor machining thimble-type special lathe according to claim 9, characterized in that: The assembly housing (4) is provided with a groove (41); The groove (41) is arc-shaped; The groove (41) corresponds to the rotor.

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