An inner and outer end face processing fixture of a generator intermediate plate

Abstract

The utility model relates to processing fixture technical field and disclose a kind of inner and outer end face processing fixture of generator middle plate, including rotating plate, index rotary table, left and right arrangement outer end face processing clamping assembly and inner end face processing clamping assembly on rotating plate, outer end face processing clamping assembly includes a plurality of first positioning pin for with the positioning hole cooperation of generator middle plate and first pressure closer, and the inner end face processing clamping assembly includes a plurality of second positioning pin for with the positioning hole cooperation of generator middle plate and a plurality of second pressure closer. By setting outer end face processing clamping assembly and inner end face processing clamping assembly on rotating plate simultaneously, two generator middle plates can be clamped simultaneously to process inner and outer end face, utilize index rotary table to drive rotating plate to overturn to complete side hole processing, orderly complete the multi-pass processing procedure of inner end face, outer end face and side hole, significantly improve production efficiency, reduce processing time consumption.

Description

Technical Field

[0001] This utility model relates to the field of machining fixture technology, and in particular to a machining fixture for the inner and outer end faces of a generator intermediate plate. Background Technology

[0002] The generator intermediate plate is a key structural component inside the generator, primarily serving to connect, support, and seal. Since the generator intermediate plate is mainly cast using die casting, the mounting surfaces on both the inner and outer end faces require precision milling. Furthermore, to reduce subsequent clamping operations and improve machining efficiency, the two side holes located next to the long shaft hole also need to be precision machined simultaneously. Therefore, it is urgently necessary to design a machining fixture specifically for this generator intermediate plate to facilitate machining on a CNC machine tool.

[0003] It is evident that existing technologies still need improvement and enhancement. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a machining fixture for the inner and outer end faces of a generator intermediate plate, which aims to complete the multi-stage machining of the inner end face, outer end face and side holes of the generator intermediate plate in an orderly manner.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A machining fixture for the inner and outer end faces of a generator intermediate plate includes a laterally extending rotating plate, an indexing turntable for driving the rotating plate to rotate, an outer end face machining clamping assembly and an inner end face machining clamping assembly arranged left and right on the rotating plate. The outer end face machining clamping assembly includes a plurality of first positioning pins for engaging with positioning holes in the generator intermediate plate, and a plurality of first clamping devices for pressing the generator intermediate plate. The inner end face machining clamping assembly includes a plurality of second positioning pins for engaging with positioning holes in the generator intermediate plate, and a plurality of second clamping devices for pressing the generator intermediate plate. When the rotating plate is placed horizontally, after the outer end face machining clamping assembly clamps the generator intermediate plate, the outer end face of the generator intermediate plate faces upward and a side hole adjacent to the long shaft hole faces forward. After the inner end face machining clamping assembly clamps the generator intermediate plate, the inner end face of the generator intermediate plate faces upward and another side hole adjacent to the long shaft hole faces forward.

[0007] As a further improvement to the above technical solution, the rotating plate is provided with multiple water spray nozzles for cleaning the first positioning pin, the first clamping device, the second positioning pin, and the second clamping device.

[0008] As a further improvement to the above technical solution, a first drain outlet is provided on the rotating plate, and the first positioning pin and the first clamping device are arranged around the first drain outlet; a second drain outlet is also provided on the rotating plate, and the second positioning pin and the second clamping device are arranged around the second drain outlet.

[0009] As a further improvement to the above technical solution, the rotating plate is provided with an internal water supply channel connected to the flushing nozzle.

[0010] As a further improvement to the above technical solution, a clearance hole is provided on one side of the second drain outlet to avoid the long shaft hole of the generator intermediate plate.

[0011] As a further improvement to the above technical solution, the outer end face machining clamping assembly further includes a first support cylinder disposed on the rotating plate, and the inner end face machining clamping assembly further includes a second support cylinder disposed on the rotating plate.

[0012] As a further improvement to the above technical solution, both the first clamping device and the second clamping device are lever cylinders, and the rotating plate is provided with an air supply channel. The bottom air inlet of the lever cylinder is connected to the air supply channel.

[0013] As a further improvement to the above technical solution, the outer end face machining clamping assembly further includes a first anti-reverse block disposed on the rotating plate; the inner end face machining clamping assembly further includes a second anti-reverse block disposed on the rotating plate.

[0014] As a further improvement to the above technical solution, the indexing turntable includes a base plate, a main turntable and a tailstock mounted on the base plate, and the output shafts of the main turntable and the tailstock are both provided with L-shaped plates to support the turntable.

[0015] As a further improvement to the above technical solution, the base plate is provided with a guide groove and a drainage hole located below the rotating plate.

[0016] The beneficial effects of this utility model are as follows: The internal and external end face machining fixture provided by this utility model can simultaneously clamp two generator intermediate plates for internal and external end face machining by setting an external end face machining clamping component and an internal end face machining clamping component on the rotating plate at the same time. The side hole machining is completed by using the indexing turntable to drive the rotating plate to rotate. With the workpiece position changed in the middle, multiple machining processes of internal end face, external end face and side hole are completed in an orderly manner, giving full play to the machining capabilities of CNC machine tools. Compared with the traditional multiple clamping machining method, it significantly improves production efficiency and reduces machining time. Attached Figure Description

[0017] Figure 1 A perspective view of the internal and external end face machining fixture provided by this utility model.

[0018] Figure 2A perspective view of the internal and external end face machining fixtures provided for this utility model for clamping the generator intermediate plate.

[0019] Figure 3 This is a schematic diagram of the outer end face of the generator intermediate plate, showing the part to be machined at point A in the diagram.

[0020] Figure 4 This is a schematic diagram of the inner end face of the generator intermediate plate, showing the part to be machined at point B.

[0021] Explanation of main component symbols: 1-rotating plate, 11-first drain outlet, 12-second drain outlet, 13-avoidance hole, 2-indexing turntable, 21-base plate, 211-guide channel, 22-main turntable, 23-tailstock, 24-L-shaped plate, 3-outer end face machining clamping assembly, 31-first positioning pin, 32-first clamping device, 33-first support cylinder, 34-first anti-reverse block, 4-inner end face machining clamping assembly, 41-second positioning pin, 42-second clamping device, 43-second support cylinder, 44-second anti-reverse block, 5-flushing nozzle, 6-generator intermediate plate, 61-outer end face, 62-inner end face, 63-long shaft hole, 64-side hole. Detailed Implementation

[0022] This utility model provides a machining fixture for the inner and outer end faces 61 of a generator intermediate plate 6. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit the scope of protection of this utility model.

[0023] Please see Figures 1 to 4 This utility model provides a machining fixture for the inner and outer end faces of a generator intermediate plate, including a laterally extending rotating plate 1, an indexing turntable 2 for driving the rotating plate 1 to rotate, an outer end face machining clamping assembly 3 and an inner end face machining clamping assembly 4 arranged on the rotating plate 1. The outer end face machining clamping assembly 3 includes a plurality of first positioning pins 31 for engaging with positioning holes in the generator intermediate plate 6, and a plurality of first clamping devices 32 for pressing the generator intermediate plate 6. The inner end face machining clamping assembly 4 includes a plurality of first positioning pins 31 for engaging with positioning holes in the generator intermediate plate 6. The second positioning pin 41 is fitted with a positioning hole, and a plurality of second clamping devices 42 are used to press the generator intermediate plate 6. When the rotating plate 1 is placed horizontally, after the outer end face machining clamping assembly 3 clamps the generator intermediate plate 6, the outer end face 61 of the generator intermediate plate 6 faces upward and a side hole 64 next to the long shaft hole 63 faces forward. After the inner end face machining clamping assembly 4 clamps the generator intermediate plate 6, the inner end face 62 of the generator intermediate plate 6 faces upward and another side hole 64 next to the long shaft hole 63 faces forward.

[0024] In actual operation, the machining fixture for the inner and outer end faces 61 of the generator intermediate plate 6 provided by this utility model forms a machining station for the outer end face 61 and a machining station for the inner end face 62, which can process two generator intermediate plates 6 at the same time. Specifically, the first generator intermediate plate 6 is first placed on the outer end face machining clamping assembly 3 on the rotating plate 1. The first positioning pins 31 are engaged with the positioning holes of the generator intermediate plate 6 to achieve precise positioning. Then, the generator intermediate plate 6 is firmly pressed by the first clamping device 32. At the same time, the second generator intermediate plate 6 is placed on the inner end face machining clamping assembly 4. Similarly, the second positioning pins 41 are engaged with the positioning holes to achieve positioning, and the second clamping device 42 is used to press it.

[0025] The CNC machine tool is started, and the outer end face 61 and inner end face 62 of the two generator intermediate plates 6 can be milled simultaneously. After the outer end face 61 of the first generator intermediate plate 6 and the inner end face 62 of the second generator intermediate plate 6 are milled, the indexing rotary table 2 drives the rotating plate 1 to rotate 90°, so that the side hole 64 on the first generator intermediate plate 6 changes from facing forward to facing upward, and the side hole 64 on the second generator intermediate plate 6 also changes from facing forward to facing upward. At this time, the CNC machine tool can perform drilling and milling on the side hole 64. After the side hole 64 is machined, the rotating plate 1 is reset to a horizontal state under the drive of the indexing rotary table 2. The clamping of the generator intermediate plates 6 is released, the two generator intermediate plates 6 are swapped and re-clamped, and the above machining steps are repeated, so that the inner end face 62, outer end face 61 and two side holes 64 of the two generator intermediate plates 6 are all machined.

[0026] The machining fixture for inner and outer end faces 61 provided by this utility model can simultaneously clamp two generator intermediate plates 6 for machining inner and outer end faces 61 by setting an outer end face machining clamping component 3 and an inner end face machining clamping component 4 on a rotating plate 1. The rotating plate 1 is driven to rotate by an indexing turntable 2 to complete the machining of the side hole 64. With the workpiece position being changed midway, multiple machining processes of inner end face 62, outer end face 61 and side hole 64 are completed in an orderly manner, giving full play to the machining capabilities of CNC machine tools. Compared with the traditional multi-clamping machining method, it significantly improves production efficiency and reduces machining time.

[0027] During the machining of the generator intermediate plate 6, impurities such as chips and oil stains easily adhere to the first locating pin 31, the first clamping device 32, the second locating pin 41, and the second clamping device 42, affecting the clamping accuracy and stability. Therefore, the rotating plate 1 is equipped with multiple water spray nozzles 5 for cleaning the first locating pin 31, the first clamping device 32, the second locating pin 41, and the second clamping device 42. The water spray nozzles 5 can promptly remove chips, oil stains, and other impurities adhering to the locating pins and clamping devices, preventing impurities from affecting the fitting accuracy between the locating pins and the locating holes of the generator intermediate plate 6, preventing uneven clamping force due to impurities, and ensuring accurate positioning and firm clamping each time the generator intermediate plate 6 is clamped. This, in turn, guarantees the machining accuracy of the inner end face 62, the outer end face 61, and the side hole 64, reducing the scrap rate caused by clamping errors.

[0028] Furthermore, the rotating plate 1 is provided with a first drain outlet 11, and the first positioning pin 31 and the first clamping device 32 are arranged around the first drain outlet 11; the rotating plate 1 is also provided with a second drain outlet 12, and the second positioning pin 41 and the second clamping device 42 are arranged around the second drain outlet 12. Wastewater generated by the water spray nozzle 5 and liquids such as coolant generated during processing can be quickly discharged through the nearest first drain outlet 11 and second drain outlet 12, preventing liquid accumulation on the rotating plate 1. Of course, providing the first drain outlet 11 and the second drain outlet 12 also contributes to weight reduction.

[0029] Preferably, the rotating plate 1 is provided with an internal water supply channel connected to the water spray head 5. Integrating the internal water supply channel inside the rotating plate 1 eliminates the need for a large number of water supply pipes on the outside of the rotating plate 1, reducing the space occupied by external pipelines, making the entire processing fixture structure more compact, avoiding pipeline interference with the rotation of the rotating plate 1, workpiece clamping and other operations, optimizing the space utilization of the equipment, and also making the processing site more tidy and orderly, facilitating worker operation and equipment management.

[0030] In the machining station of the inner end face 62, since the long shaft hole 63 of the generator intermediate plate 6 faces the rotating plate 1, in order to avoid interference between the long shaft hole 63 and the rotating plate 1, a clearance hole 13 is provided on one side of the second drain outlet 12 to avoid the long shaft hole 63 of the generator intermediate plate 6. During the clamping process, sufficient space is reserved for the long shaft hole 63 to avoid interference between the fixture structure and the long shaft hole 63, which would cause the generator intermediate plate 6 to be unable to be installed correctly or not clamped properly, ensuring that the machining operation can be carried out smoothly and meeting the machining process requirements of the generator intermediate plate 6.

[0031] The outer end face machining clamping assembly 3 also includes a first support cylinder 33 mounted on the rotating plate 1, and the inner end face machining clamping assembly 4 also includes a second support cylinder 43 mounted on the rotating plate 1. The first support cylinder 33 and the second support cylinder 43 provide additional support force to the workpiece when clamping the generator intermediate plate 6. Especially for generator intermediate plates 6 with large dimensions and irregular shapes, the support cylinders can effectively disperse the clamping force, preventing the workpiece from shaking or shifting due to uneven force, ensuring the workpiece remains stable during machining, and laying the foundation for high-quality machining. Stable support also reduces workpiece vibration during machining, reducing dimensional deviations and surface roughness problems caused by vibration. Whether milling the inner and outer end faces 61 or drilling and milling the side holes 64, the support cylinders can ensure the relative positional accuracy between the tool and the workpiece, thereby improving the machining accuracy of each machined surface and hole of the generator intermediate plate 6 and increasing the product qualification rate.

[0032] In this embodiment, both the first clamping device 32 and the second clamping device 42 are lever cylinders. Lever cylinders utilize the lever principle to output a large clamping force with a small amount of air power, and the degree of clamping on the generator intermediate plate 6 can be precisely controlled by adjusting the air supply pressure. Whether the structure is thin-walled or the component is thick, reliable fixation is ensured while preventing workpiece deformation due to excessive pressure, ensuring workpiece stability during processing and effectively improving processing accuracy and product quality.

[0033] The rotating plate 1 is equipped with an internal air supply channel, and the bottom air inlet of the lever cylinder is connected to the internal air supply channel. The internal air supply channel is hidden inside the rotating plate 1, providing a stable air source for the lever cylinder. This avoids problems such as bending, wear, and air leakage that may occur due to exposed external air pipes, reducing the probability of equipment failure. At the same time, the lever cylinder has a compact structure and stable performance, enabling it to work continuously for a long time, ensuring the stable operation of the fixture under high-load processing tasks, and reducing the frequency and cost of equipment maintenance.

[0034] The outer end face machining clamping assembly 3 further includes a first anti-reverse mounting block 34 disposed on the rotating plate 1; the inner end face machining clamping assembly 4 further includes a second anti-reverse mounting block 44 disposed on the rotating plate 1. Since the outer end face machining clamping assembly 3 and the inner end face machining clamping assembly 4 clamp the generator intermediate plate 6 in opposite directions, to prevent incorrect clamping direction from causing the machining to completely deviate from the design requirements, the first anti-reverse mounting block 34 and the second anti-reverse mounting block 44, through unique shape and position design, match the specific structure of the generator intermediate plate 6, forming a mechanical limit during clamping. If the workpiece is mounted in reverse, the anti-reverse mounting block will prevent it from reaching its correct position, allowing the operator to visually detect the clamping error, avoiding the generation of machining defects due to reverse mounting, ensuring that each workpiece is processed in the correct orientation, and improving the product qualification rate.

[0035] Specifically, the indexing rotary table 2 includes a base plate 21, a main rotary table 22 and a tailstock 23 mounted on the base plate 21. The output shafts of both the main rotary table 22 and the tailstock 23 are equipped with L-shaped plates 24 to support the rotating plate 1. The base plate 21, as a basic support component, provides a stable mounting platform, effectively distributing the forces on the main rotary table 22, tailstock 23, and rotating plate 1 during processing, reducing vibration transmission. The main rotary table 22 and tailstock 23 work together, supporting the rotating plate 1 from both ends through the L-shaped plates 24 on the output shafts, forming a stable support structure and preventing the rotating plate 1 from wobbling or shifting during rotation. The stable rotary table structure ensures the generator intermediate plate 6 is precisely positioned during processing. Whether milling the end face or drilling the side holes 64, it effectively reduces processing errors caused by rotary table instability, improving product processing accuracy. The indexing rotary table 2 is actually a mature existing technology, and those skilled in the art can purchase it from the market according to their actual needs.

[0036] Furthermore, the base plate 21 is provided with a guide channel 211 and a drain hole located below the rotating plate 1. During the processing of the generator intermediate plate 6 and the cleaning of the clamping assembly using the water spray nozzle 5, a large amount of coolant, rinsing wastewater, and processing debris are generated. The guide channel 211 can concentrate and guide the liquid and debris below the rotating plate 1, allowing them to flow along the channel to the drain hole and be quickly discharged outside the equipment.

[0037] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of this utility model.

Claims

1. A jig for machining the inner and outer end faces of a generator intermediate plate, characterized in that, The system includes a laterally extending rotating plate, an indexing turntable for driving the rotating plate to rotate, and outer end face machining and clamping assemblies and inner end face machining and clamping assemblies arranged on the rotating plate. The outer end face machining and clamping assemblies include multiple first locating pins for engaging with locating holes in the generator intermediate plate, and multiple first clamping devices for pressing the generator intermediate plate. The inner end face machining and clamping assemblies include multiple second locating pins for engaging with locating holes in the generator intermediate plate, and multiple second clamping devices for pressing the generator intermediate plate. When the rotating plate is placed horizontally, after the outer end face machining and clamping assemblies clamp the generator intermediate plate, the outer end face of the generator intermediate plate faces upward and one side hole adjacent to the long shaft hole faces forward. After the inner end face machining and clamping assemblies clamp the generator intermediate plate, the inner end face of the generator intermediate plate faces upward and another side hole adjacent to the long shaft hole faces forward.

2. The machining fixture for the inner and outer end faces of the generator intermediate plate according to claim 1, characterized in that, The rotating plate is equipped with multiple water spray nozzles for cleaning the first positioning pin, the first clamping device, the second positioning pin, and the second clamping device.

3. The machining fixture for the inner and outer end faces of the generator intermediate plate according to claim 2, characterized in that, The rotating plate is provided with a first drain outlet, and the first positioning pin and the first clamping device are arranged around the first drain outlet; the rotating plate is also provided with a second drain outlet, and the second positioning pin and the second clamping device are arranged around the second drain outlet.

4. The machining fixture for the inner and outer end faces of the generator intermediate plate according to claim 2 or 3, characterized in that, The rotating plate is provided with an internal water supply channel that is connected to the flushing nozzle.

5. The machining fixture for the inner and outer end faces of the generator intermediate plate according to claim 3, characterized in that, A clearance hole is provided on one side of the second drain outlet to avoid the long shaft hole of the generator intermediate plate.

6. The machining fixture for the inner and outer end faces of the generator intermediate plate according to claim 1, characterized in that, The outer end face machining clamping assembly further includes a first support cylinder disposed on the rotating plate, and the inner end face machining clamping assembly further includes a second support cylinder disposed on the rotating plate.

7. The machining fixture for the inner and outer end faces of the generator intermediate plate according to claim 1, characterized in that, Both the first and second clamping devices are lever cylinders. The rotating plate is provided with an internal air supply channel, and the bottom air inlet of the lever cylinder is connected to the internal air supply channel.

8. The machining fixture for the inner and outer end faces of the generator intermediate plate according to claim 1, characterized in that, The outer end face machining clamping assembly further includes a first anti-reverse block disposed on the rotating plate; the inner end face machining clamping assembly further includes a second anti-reverse block disposed on the rotating plate.

9. The machining fixture for the inner and outer end faces of the generator intermediate plate according to claim 1, characterized in that, The indexing turntable includes a base plate, a main turntable and a tailstock mounted on the base plate, and the output shafts of the main turntable and the tailstock are each provided with an L-shaped plate to support the turntable.

10. The machining fixture for the inner and outer end faces of the generator intermediate plate according to claim 9, characterized in that, The base plate has a guide groove and a drainage hole located below the rotating plate.

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