Milling jig for machining aviation thin-walled cylinder tail bin piece

Abstract

The utility model relates to a milling jig for machining an aviation thin-walled cylinder tail bin piece, which comprises a base provided with a bottom support, two supporting bodies arranged on the base, two ends of a cylinder workpiece connected with the supporting bodies, the bottom support positioned below the workpiece, a base shaft connected with a seat disc, the seat disc positioned below the base, a side bracket arranged on the seat disc, and a side bracket arranged on the side bracket, an adjusting shaft penetrates through the side position support, the adjusting shaft is connected with an inner support, the inner support is located in the cylinder type workpiece, and when the adjusting shaft is screwed, the inner support is controlled to apply inner supporting force to the cylinder type workpiece; compared with the prior art, the clamp has the advantages that an advanced profiling limiting method is adopted for design, accurate positioning and multi-point supporting of a machining part during part machining are achieved, machining deformation of the part is limited, the clamping, positioning and machining deformation preventing effects on similar special-shaped parts are extremely obvious, the clamp can be used for batch production and machining of the parts, and the machining efficiency is improved. The machining efficiency is improved, and the part alignment time is shortened.

Description

Technical Field

[0001] This utility model belongs to the field of milling machine fixtures, specifically relating to a milling machine fixture for machining thin-walled cylindrical irregular parts. Background Technology

[0002] The tail section is one of the more important parts of a certain type of aero-engine. The part is about 500mm long and only 4mm thick. It has an irregular shape and various notches and openings on its surface. The machining parts are located at both ends and the middle of the part. In addition to machining the inner surface, multiple holes are also machined. The dimensions and technical precision requirements are high.

[0003] Because of its irregular shape and thin-walled cylindrical nature, it is impossible to accurately position the part when using a general clamping method to process it. The actual reference of the processed part deviates from the design reference, and the part is deformed, resulting in the part's dimensions and technical requirements exceeding tolerances, leading to the scrapping of the part and potentially causing significant economic losses. Utility Model Content

[0004] The purpose of this utility model is to provide a milling machine fixture that can position and clamp thin-walled cylindrical tail compartment parts such as tail compartments, and can reduce machining deformation.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is a milling machine fixture for machining thin-walled cylindrical tail compartment parts for aviation. It includes a base with a bottom support, two support bodies on the base, and the two ends of the cylindrical workpiece connected to the support bodies. The bottom support is located below the workpiece. A seat plate is axially connected to the base and is located below the base. A side bracket is provided on the seat plate, and an adjusting shaft passes through the side bracket. The adjusting shaft is connected to an inner support, which is located inside the cylindrical workpiece. When the adjusting shaft is turned, it controls the inner support to apply an internal supporting force to the cylindrical workpiece. An outer clamping component is provided on the support body, and the outer clamping component applies a clamping force to the cylindrical workpiece.

[0006] Furthermore, the inner support includes an inner support seat with a central opening. An inner support rod passes through the inner support seat, with one end of the inner support rod located inside the central opening. A central frame is installed inside the central opening and is connected to the adjustment shaft.

[0007] Furthermore, the adjusting shaft is provided with an external thread, and the side bracket is provided with a horizontal through threaded hole. The adjusting shaft passes through the threaded hole, and when the adjusting shaft is turned, it controls the movement of the inner support inside the cylindrical workpiece.

[0008] Furthermore, the side support consists of a support body and an insert block. A threaded hole is provided on the insert block, and a limit socket is provided on the support body. The insert block is inserted into the limit socket.

[0009] Furthermore, the inner end of the adjusting shaft is connected to an adjusting seat, which is connected to the center frame. When the insert block moves out of the limiting insertion hole, the adjusting seat moves axially along the adjusting shaft.

[0010] Furthermore, the adjusting seat includes two end plates, with a pull shaft connecting the two end plates. A limit block is provided on the pull shaft, and the pull shaft passes through the central frame.

[0011] Furthermore, the central frame includes an annular outer frame, which is connected to the inner support via a diagonal support arm. The annular outer frame is connected to a rotatable central disc, which is connected to a pull shaft.

[0012] Furthermore, the outer ring frame is provided with an arc-shaped slot, and a locking arm is fixed on the central plate. The locking arm passes through the arc-shaped slot, and when the central plate rotates, it drives the locking arm to move, and the locking arm applies a thrust to the inner support rod.

[0013] Furthermore, the central plate is provided with a mating groove, into which the limiting block can be inserted. The mating groove is connected to a shaft hole, which extends through to the end face of the central plate, through which the pull shaft passes.

[0014] Furthermore, the inner support rod includes an outer tube and an inner rod. One end of the inner rod is located inside the outer tube, and the other end is fixed with a support pad. A compression return spring is installed inside the outer tube.

[0015] Compared with the existing technology, the beneficial effects of this utility model are: it adopts an advanced method of contour limiting design, which realizes precise positioning and multi-point support for the machining parts during processing, and limits the deformation of the parts during processing. It has a very obvious effect on clamping, positioning and preventing machining deformation of similar irregular parts. It can be used for mass production of parts, improves processing efficiency and reduces the time for part alignment.

[0016] When internally supporting a part, the movement of the internal support within the part is controlled by adjusting the shaft. Once the internal support has moved to the designated position, the internal support applies an internal supporting force to the part by turning the adjusting shaft. This eliminates the need for workers to reach inside the part to adjust the position of the internal support, reducing the labor intensity of the operator. Attached Figure Description

[0017] Figure 1 This is a schematic diagram showing the docking state of the support body and the parts of this utility model;

[0018] Figure 2 This is a schematic diagram showing the connection between the internal support and the parts of this utility model;

[0019] Figure 3 This is a schematic diagram of the main structure of this utility model;

[0020] Figure 4 This is a schematic diagram showing the connection between the adjustment shaft and the side bracket of this utility model;

[0021] Figure 5 This is a schematic diagram showing the connection between the adjusting shaft and the central disc of this utility model;

[0022] Figure 6 This is a schematic diagram of the internal support structure of this utility model;

[0023] Among them, 1-seat plate, 2-base, 3-support body, 4-irregular opening, 5-bottom support, 6-inner support, 7-roller, 8-outer clamping component, 9-slide rail, 10-slider, 11-side bracket, 12-adjusting shaft, 13-control panel, 14-inner support seat, 15-center opening, 16-inner support rod, 17-ring outer frame, 18-slanted support arm, 19-center plate, 20-locking support arm, 21-guide plate, 22-guide notch, 23-positioning rod, 24-fitting groove, 25-shaft hole, 26-end plate, 27-pull shaft, 28-limiting block, 29-support body, 30-insertion block, 31-limiting insertion hole, 32-horizontal hole, 33-short sleeve. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. It should be understood that the preferred embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model. In the embodiments, the components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application.

[0025] See Figures 1 to 6As shown, a milling machine fixture for machining thin-walled cylindrical tail section parts for aircraft includes a base plate 1 and a base 2. The base 2 is located above the base plate 1. A central shaft is installed in the middle of the base 2. A recess is provided in the center of the base plate 1, and a bearing is installed in the recess. The central shaft is inserted into the bearing, allowing the base 2 to rotate. Two supports 3 are provided on the base 2, each with a shaped opening 4 that matches the cross-section of the part. A bottom support 5 is also provided on the base 2. Between the support bodies 3, when positioning the part, the end of the part is inserted into the irregular opening 4 on the support body 3. At this time, the bottom support 5 supports the part. Then, the inner support 6 is installed inside the part. Rollers 7 are provided on the bottom surface of the inner support 6 so that the inner support 6 tensions and supports the middle position of the part. At the same time, an outer clamping component 8 is provided on the support body 3. The outer clamping component 8 applies clamping force to the end position of the workpiece. At this time, the part is in a relatively stable state, and the inner surface of the part can be processed to reduce processing deformation.

[0026] A slide rail 9 is provided on the base 2, and a slider 10 is fixed to the bottom of the support body 3. The slider 10 is assembled in the slide rail 9. At this time, the support body 3 can slide on the base 2. When positioning the workpiece, the workpiece is first placed on the bottom support 5, which is a strip plate. At this time, the workpiece is located between the two support bodies 3. Then, the two support bodies 3 are slid to allow the end of the workpiece to enter the irregular opening 4. Then, the support body 3 is locked in position. For example, a bolt is screwed on the slider 10. By tightening the bolt, the slider 10 is locked in position, thereby locking the support body 3 in position. Then, the inner support 6 is moved into the workpiece.

[0027] A side support 11 is provided on the base plate 1, and an adjustment shaft 12 passes through the side support 11. This adjustment shaft 12 is connected to the inner support 6. By rotating the adjustment shaft 12, the inner support 6 can be moved along the axial direction of the adjustment shaft 12. Specifically, the adjustment shaft 12 is provided with an external thread, and the outer end of the adjustment shaft 12 is connected to a control panel 13. The side support 11 is provided with a horizontal through threaded hole, through which the adjustment shaft 12 passes. At this time, the inner end of the adjustment shaft 12 is connected to the inner support 6. By rotating the control panel 13, the adjustment shaft 12 is turned, thereby adjusting the position of the inner support 6 connected to its inner end within the workpiece.

[0028] After the inner support 6 reaches the desired position, the adjusting shaft 12 controls the inner support 6 to apply an internal supporting force to the workpiece. The inner support 6 includes an inner support seat 14, on which a center opening 15 is provided. An inner support rod 16 passes through the inner support seat 14, with one end of the inner support rod 16 located inside the center opening 15. This inner support rod 16 can be axially translated. A center frame is installed inside the center opening 15. The center frame is used to connect the adjusting shaft 12. In order to enable the adjusting shaft 12 to control the axial movement of the inner support rod 16 to apply a supporting force to the workpiece, the center frame includes... The system includes an annular outer frame 17, which is connected to the inner support base 14 via inclined support arms 18. The inner support rod 16 is positioned between two adjacent inclined support arms 18. The annular outer frame 17 has an arc-shaped opening. A rotatable central disc 19 is connected to the annular outer frame 17, and a locking support arm 20 is fixed to the central disc 19. The locking support arm 20 passes through the arc-shaped opening. Rotation of the central disc 19 causes the locking support arm 20 to move. A guide plate 21 is fixed to the inner end of the inner support rod 16, and the guide plate 21 has an arc-shaped guide notch 22. The guide notch 22 extends from one end of the guide plate 21 to the other, and the distance between it and the center of the annular outer frame 17 gradually decreases. One end of the guide notch 22 is open, and the other end is closed. A locking rod 23 is fixed to the free end of the locking arm 20. After the central disc 19 rotates, the locking rod 23 moves in an arc trajectory until it enters the guide notch 22. As the central disc 19 continues to rotate, the locking rod 23 moves to the closed end of the guide notch 22. Because the locking arm 20... Since the length remains unchanged, the guide plate 21 will move away from the annular outer frame 17 during this process. The locking arm 20 applies a thrust to the inner support rod 16, so that the outer end of the inner support rod 16 abuts against the inner surface of the workpiece. The inner support rod 16 includes an outer tube and an inner rod. The cross-section of the outer tube is square. The guide plate 21 is fixed to the inner end of the outer tube. A compression return spring is provided inside the outer tube. One end of the inner rod is located inside the outer tube, and the other end is fixed with a support pad. The support pad contacts the inner surface of the workpiece, thereby providing sufficient internal support force to the workpiece.

[0029] The rotation of the locking arm 20 is controlled by the adjusting shaft 12. Therefore, a mating groove 24 is provided on the center plate 19. This mating groove 24 is a square groove. The mating groove 24 is connected to the shaft hole 25. The shaft hole 25 extends from the end face of the center plate 19 to the mating groove 24 until the two are connected. The center plate 19 is connected to the adjusting seat through this structure. The adjusting seat is fixed to the inner end of the adjusting shaft 12. The adjusting seat includes two end plates 26. A pull shaft 27 is connected between the two end plates 26. The pull shaft 27 passes through the shaft hole 25. A limit block 28 is provided on the pull shaft 27. The limit block 28 is also square. When the adjusting shaft 12 is axially translated but the position of the center plate 19 remains unchanged, the limit block 28 enters the mating groove 24. At this time, controlling the rotation of the adjusting shaft 12 can drive the center plate 19 to rotate, thereby driving the locking arm 20 to move.

[0030] However, when the aforementioned adjusting shaft 12 rotates to control the movement of the locking arm 20, the adjusting shaft 12 needs not to move axially. Therefore, the side bracket 11 is designed to consist of a bracket body 29 and a plug 30. The bracket body 29 is provided with a limiting insertion hole 31, which is connected to a horizontal hole 32. The plug 30 is inserted into the limiting insertion hole 31. The plug 30 can be translated to move out of or into the limiting insertion hole 31. When the plug 30 is located in the limiting insertion hole 31, the plug 30 cannot rotate. A threaded hole is provided on the plug 30. The adjusting shaft 12 is composed of... The threaded hole on the insert 30 passes through, and a short sleeve 33 is mated at the end of the insert 30. The short sleeve 33 passes through the horizontal hole 32 and has a circular cross-section. When the inner support 6 is moved by adjusting the shaft 12, the insert 30 is located in the limiting insertion hole 31. When the inner support 6 reaches the required position, the adjusting shaft 12 is moved to make the insert 30 move out of the limiting insertion hole 31. At this time, the limiting block 28 enters the mating groove 24 on the center plate 19. Then, by turning the adjusting shaft 12, the center plate 19 can be rotated, and the inner support force is applied to the workpiece through the inner support rod 16.

[0031] At this point, one side of the workpiece can be machined. Once this side is machined, the inner support 6 is removed, and then the base 2 is rotated so that the inner support 6 can enter the workpiece from the machined side, allowing the inner surface of the other side of the workpiece to be machined.

[0032] The external clamping component 8 in this technical solution includes a screw rod. A through screw hole is provided on the support body. The screw rod is screwed into the through screw hole. When the screw rod is screwed, the inner end of the screw rod can enter the irregular opening. Similarly, the inner end of the screw rod is connected to a washer. The washer can contact the outer surface of the workpiece to apply clamping force to the workpiece.

[0033] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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; they can refer to an electrical connection; they can refer to a hydraulic connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be primarily defined by the scope of the claims.

Claims

1. A milling machine fixture for machining thin-walled cylindrical tail section parts for aircraft, comprising a base with a bottom support, two support bodies mounted on the base, both ends of the cylindrical workpiece being connected to the support bodies, and the bottom support body being located below the workpiece, characterized in that: The base is connected to a seat plate on the shaft. The seat plate is located below the base. A side bracket is provided on the seat plate. An adjustment shaft passes through the side bracket. The adjustment shaft is connected to an inner support. The inner support is located inside the cylindrical workpiece. When the adjustment shaft is turned, it controls the inner support to apply an internal support force to the cylindrical workpiece. The support body is provided with an external clamping component, which applies a clamping force to the cylindrical workpiece.

2. A milling machine fixture for machining thin-walled cylindrical tail section parts for aircraft, as described in claim 1, characterized in that: The inner support includes an inner support base with a central opening. An inner support rod passes through the inner support base, with one end of the inner support rod located inside the central opening. A central frame is installed inside the central opening and is connected to an adjustment shaft.

3. A milling machine fixture for machining thin-walled cylindrical tail section parts for aircraft, as described in claim 1 or 2, characterized in that: The adjusting shaft is provided with an external thread, and the side bracket is provided with a horizontal through threaded hole. The adjusting shaft passes through the threaded hole, and when the adjusting shaft is turned, it controls the movement of the inner support inside the cylindrical workpiece.

4. A milling machine fixture for machining thin-walled cylindrical tail section parts for aircraft, as described in claim 3, characterized in that: The side support consists of a support body and a plug. A threaded hole is provided on the plug, and a limit hole is provided on the support body. The plug is inserted into the limit hole.

5. A milling machine fixture for machining thin-walled cylindrical tail section parts for aircraft, as described in claim 3, characterized in that: The inner end of the adjusting shaft is connected to an adjusting seat, which is connected to the center frame. When the insert block moves out of the limiting insertion hole, the adjusting seat moves along the axial direction of the adjusting shaft.

6. A milling machine fixture for machining thin-walled cylindrical tail section parts for aircraft, as described in claim 5, characterized in that: The adjustment seat includes two end plates, with a pull shaft connecting the two end plates. A limit block is provided on the pull shaft, and the pull shaft passes through the central frame.

7. A milling machine fixture for machining thin-walled cylindrical tail section parts for aircraft, as described in claim 6, characterized in that: The central frame includes an annular outer frame, which is connected to an inner support via a diagonal support arm. A rotatable central disc is connected to the annular outer frame, and the central disc is connected to a pull shaft.

8. A milling machine fixture for machining thin-walled cylindrical tail section parts for aircraft, as described in claim 7, characterized in that: The annular outer frame is provided with an arc-shaped slot, and a locking arm is fixed on the central plate. The locking arm passes through the arc-shaped slot. When the central plate rotates, it drives the locking arm to move, and the locking arm applies a thrust to the inner support rod.

9. A milling machine fixture for machining thin-walled cylindrical tail section parts for aircraft, as described in claim 7, characterized in that: The central disk is provided with a mating groove, into which the limiting block can be inserted. The mating groove is connected to a shaft hole, which extends through to the end face of the central disk, and the pull shaft passes through the shaft hole.

10. A milling machine fixture for machining thin-walled cylindrical tail section parts for aircraft, as described in claim 2 or 8, characterized in that: The inner support rod includes an outer tube and an inner rod. One end of the inner rod is located inside the outer tube, and the other end is fixed with a support pad. A compression return spring is installed inside the outer tube.

Images