A device for processing deep and long blind hole of aviation spline shaft

Abstract

The utility model discloses a kind of deep long blind hole processing devices for aviation spline shaft, it is related to spline shaft processing tool technical field, including pedestal, the inner wall rear end upper end of pedestal is horizontally installed with limit plate, and the top surface, bottom surface and one side of pedestal inner wall front end are all set with limit slot, form sliding slot between two limit plates, the inner bottom surface of pedestal is installed with fixed mechanism, drilling mechanism for spline shaft trepanning is installed in sliding slot;The utility model is cooperated with the cooperation of guide plate and guide rubber ring, it is convenient to stabilize drill rod when drilling, prevent vibration due to drill rod too long from affecting drilling;Through the cooperation of motorized spindle, rotary connector and drill rod, it is convenient to realize that cutting fluid flows into drilling, it is convenient to quickly cool drill rod and workpiece, improve the precision of drilling, through the above structure, the problem that the deep long blind hole processing device of existing aviation spline shaft is prone to form vibration in rotation and affect drilling precision due to drill rod too long in use is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of spline shaft machining tools, and in particular to a deep and long blind hole machining device for aerospace spline shafts. Background Technology

[0002] The deep and long blind hole machining device for aerospace spline shafts is a high-precision machining equipment used for key components of aero-engine transmission systems. It primarily solves the machining challenges of deep and long blind holes inside spline shafts, ensuring hole position accuracy, surface quality, and coaxiality to meet the stringent requirements of the aerospace industry for lightweight, high strength, and reliability. Existing deep and long blind hole machining devices for aerospace spline shafts typically use a fixing mechanism to secure the workpiece, followed by drilling using a horizontally movable drilling mechanism. Simultaneously, an electric spindle with center-outlet cooling capability introduces cutting fluid into the drill hole to cool the drilling area. However, this device suffers from the problem of excessively long drill rods causing vibrations during high-speed rotation, which affects machining accuracy. Therefore, improvements are needed to address these issues. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a deep and long blind hole machining device for aerospace spline shafts.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a deep and long blind hole machining device for aerospace spline shafts, comprising a base, wherein limit plates are horizontally installed at the upper and lower ends of the inner wall of the base, and limit grooves are formed on the top surface, bottom surface and one side surface of the front end of the inner wall of the base, a sliding groove is formed between the two limit plates, a fixing mechanism is installed on the inner bottom surface of the base, and a drilling mechanism for opening holes in the spline shaft is installed in the sliding groove.

[0005] Preferably, the fixing mechanism includes a mounting box installed on one side of the inner bottom surface of the base. Mounting grooves are provided on both sides of the interior of the mounting box. Mounting plates are vertically fixed within the mounting grooves. Guide rings are fixed to the distal sides of the two mounting plates. Multiple first guide grooves are equidistantly provided around the periphery of the guide rings. A positioning groove is transversely provided through the middle of the mounting box and the mounting plates. The mounting groove communicates with the positioning groove. Driven gear rings are rotatably connected to the distal sides of the two mounting plates. The driven gear rings are sleeved on the guide rings, and multiple through arc-shaped movable grooves are equidistantly provided around the periphery of the driven gear rings. A drive gear is engaged at the upper end of the driven gear ring.

[0006] Preferably, the drive gear is rotatably connected to the mounting plate, and a second motor is installed on the adjacent sides of the two drive gears. The adjacent sides of the second motor are fixed inside the mounting box, and the drive shaft of the second motor passes through the mounting plate and is fixedly connected to the drive gear. A clamping block is slidably connected in the first guide groove, and a rubber block is fixedly connected to the adjacent ends of multiple clamping blocks at the same end. The clamping block has an L-shaped cross-section, and one end of the clamping block is placed in the movable groove for slidable connection.

[0007] Preferably, an observation window is slidably connected within the limiting groove, and drainage holes are equidistantly opened at the rear end of the inner bottom surface of the base; two guide plates are installed in the middle of the inner bottom surface of the base, a movable plate is installed at the upper end of the guide plate, the rear end of the movable plate is movably hinged to the guide plate, and the front end of the movable plate is connected to the guide plate through a positioning bolt; a second guide groove is provided between the guide plate and the movable plate, and a guide rubber ring is rotatably connected within the second guide groove.

[0008] Preferably, the drilling mechanism includes a screw that is laterally rotatably connected in a groove, and a first motor is provided at the other end of the screw. The drive shaft of the first motor is connected to the screw through a coupling, and the first motor is fixed to the base through a mounting bracket. A slider is threadedly connected to the screw, the rear end of the slider is placed in the groove and slides, and an electric spindle is fixed to the front end of the slider. A drill rod is connected to one side of the electric spindle through a coupling.

[0009] Preferably, the rear end of the electric spindle is connected to a rotary connector via a flange, and the other side of the rotary connector is connected to a cutting fluid input pipe. A through-flow fluid guide groove is opened laterally inside the drill rod, and a V-shaped chip removal groove is opened laterally on the outer side of the drill rod. The guide rubber ring is fitted with a guide hole in the drill rod.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: In this utility model, the cooperation between the guide plate and the guide ring facilitates the stability of the drill rod during drilling, preventing vibration caused by excessive drill rod length from affecting the drilling; the cooperation between the screw and the first motor facilitates the control of the slider movement, thereby controlling the drilling depth; the cooperation between the electric spindle, the rotary connector, and the drill rod facilitates the flow of cutting fluid into the drill hole, facilitating rapid cooling of the drill rod and the workpiece, and improving the drilling accuracy. The above structure solves the problem that existing deep and long blind hole machining devices for aerospace spline shafts are prone to vibration during rotation due to excessive drill rod length, thus affecting drilling accuracy. Attached Figure Description

[0011] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a three-dimensional schematic diagram of the overall structure proposed in this utility model; Figure 2 This is a schematic diagram of the overall structure proposed in this utility model from another perspective; Figure 3 This is a three-dimensional schematic diagram of the installation state structure proposed in this utility model; Figure 4 This is a three-dimensional schematic diagram of a portion of the structure proposed in this utility model; Figure 5 This is a cross-sectional schematic diagram of the fixing structure proposed in this utility model; Figure 6 This is a three-dimensional schematic diagram of the internal structure of the fixed structure proposed in this utility model; Figure 7 This is a three-dimensional schematic diagram of the drill pipe structure proposed in this utility model.

[0012] The numbers in the diagram are: 1. Base; 2. Observation window; 3. Mounting box; 4. Slider; 5. Electric spindle; 6. Rotary connector; 7. Guide plate; 8. Screw; 9. First motor; 10. Guide rubber ring; 11. Second motor; 12. Drive gear; 13. Driven gear ring; 14. Mounting plate; 15. Guide ring; 16. Clamping block; 17. Drill rod. Detailed Implementation

[0013] 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. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0014] Example: See Figures 1 to 7This utility model discloses a deep and long blind hole machining device for aerospace spline shafts, comprising a base 1. Limiting plates are horizontally installed at the upper and lower ends of the inner wall of the base 1, and limiting grooves are formed on the top, bottom, and one side of the front end of the inner wall of the base 1. A sliding groove is formed between the two limiting plates. A fixing mechanism is installed on the inner bottom surface of the base 1, and a drilling mechanism for drilling spline shafts is installed in the sliding groove. The fixing mechanism and the drilling mechanism facilitate rapid drilling of the workpiece. The fixing mechanism includes a mounting box 3 installed on one side of the inner bottom surface of the base 1. Mounting grooves are formed on both sides of the interior of the mounting box 3, and mounting plates 14 are vertically fixed in the mounting grooves. Guide rings 15 are fixed to the distal sides of the two mounting plates 14. Multiple first guide grooves are equidistantly formed around the guide rings 15. A positioning groove is horizontally formed through the middle of the mounting box 3 and the mounting plates 14, and the mounting grooves communicate with the positioning grooves. The distal sides of the two mounting plates 14 can rotate. A driven gear ring 13 is connected and sleeved on a guide ring 15. Multiple through-arc movable slots are equidistantly opened on the circumference of the driven gear ring 13. A drive gear 12 is meshed at the upper end of the driven gear ring 13. The drive gear 12 is rotated by a second motor 11, which in turn drives the driven gear ring 13 to move the clamping block 16 inward to clamp the workpiece. The drive gear 12 is rotatably connected to the mounting plate 14. A second motor 11 is installed on the adjacent side of the two drive gears 12. The adjacent side of the second motor 11 is fixed inside the mounting box 3. The drive shaft of the second motor 11 passes through the mounting plate 14 and is fixed to the drive gear 12. A clamping block 16 is slidably connected in the first guide slot. A rubber block is fixed to the adjacent end of multiple clamping blocks 16 at the same end. The cross-section of the clamping block 16 is L-shaped, and one end of the clamping block 16 is placed in the movable slot for sliding connection. The displacement direction of the clamping block 16 can be easily controlled through the first guide slot and the movable slot.

[0015] In this invention, an observation window 2 is slidably connected within the limiting groove, and drainage holes are equidistantly opened at the rear end of the inner bottom surface of the base 1. Two guide plates 7 are installed in the middle of the inner bottom surface of the base 1. A movable plate is installed on the upper end of the guide plate 7, and the rear end of the movable plate is movably hinged to the guide plate 7. The front end of the movable plate is connected to the guide plate 7 through a positioning bolt. A second guide groove is provided between the guide plate 7 and the movable plate. A guide rubber ring 10 is rotatably connected within the second guide groove. The guide plate 7, the movable plate, and the guide rubber ring 10 facilitate the maintenance of the stability of the drill rod 17 during drilling. The drilling mechanism includes a screw 8 that is laterally rotatably connected within a sliding groove. A first motor 9 is provided at the other end of the screw 8. The drive shaft of the first motor 9 is connected to the screw 8 through a coupling, and the first motor 9 is fixedly connected by a mounting bracket. On the base 1, a slider 4 is threadedly connected to the screw 8. The rear end of the slider 4 slides in the groove, and the front end of the slider 4 is fixedly connected to an electric spindle 5 (model CTS-2630). One side of the electric spindle 5 is connected to a drill rod 17 via a coupling. The first motor 9 and the electric spindle 5 facilitate the control of the rotation and movement of the drill rod 17 to process the workpiece. The rear end of the electric spindle 5 is connected to a rotary connector 6 via a flange. The other side of the rotary connector 6 is connected to a cutting fluid input pipe. A through-flow fluid guide groove is opened in the drill rod 17, and a V-shaped chip removal groove is opened in the outer side of the drill rod 17. A guide ring 10 is provided with a guide hole in cooperation with the drill rod 17. The fluid guide groove and the chip removal groove facilitate the cooling of the drill rod 17 and the workpiece during drilling, and the metal chips are discharged at the same time.

[0016] Working principle: When using this utility model, firstly, the guide ring 10 is sleeved on the drill rod 17 and rotatably connected in the second guide groove. Then, the movable plate and the guide plate 7 are fixed by the positioning bolt. Then, the drill rod 17 is connected to the electric spindle 5 through the coupling, and all electrical equipment is powered on. When drilling is required, first, the workpiece is placed in the positioning groove with its rear end abutting against the base 1. Then, the two second motors 11 are started to rotate in opposite directions, driving the driven gear ring 13 to rotate, thereby controlling the clamping block 16 to retract inward under the cooperation of the first guide groove and the movable groove, thus fixing the workpiece. After the workpiece is fixed, the electric spindle 5 can be started to drive the drill rod 17 closer to the drill rod. The workpiece is simultaneously guided by the rotating connector 6, which introduces cutting fluid into the electric spindle 5 and into the fluid guide groove of the drill rod 17. At this time, the first motor 9 is started to control the screw 8 to rotate, thereby driving the drill rod 17 to move and drill the workpiece. During drilling, the introduction of cutting fluid rapidly cools the workpiece and the drill rod, and at the same time, the metal chips generated during drilling are discharged through the chip removal groove. Simultaneously, the observation window 2 is moved to block the discharged impurities. After drilling is completed, the first motor 9 is reversed to drive the screw 8 to reverse, which pulls the drill rod 17 open. Then the electric spindle 5 is turned off. At the same time, the second motor 11 is reversed to control the clamping block 16 to move outward and release the workpiece. At this time, the workpiece can be taken out, and the machining is completed.

[0017] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A device for machining deep and long blind holes for aerospace spline shafts, comprising a base (1), characterized in that: Limiting plates are horizontally installed at the upper and lower ends of the inner wall of the base (1), and limiting grooves are opened on the top surface, bottom surface and one side surface of the inner wall of the base (1). A sliding groove is formed between the two limiting plates. A fixing mechanism is installed on the inner bottom surface of the base (1), and a drilling mechanism for opening holes in the spline shaft is installed in the sliding groove. The fixing mechanism includes a mounting box (3) installed on one side of the bottom surface of the base (1). The mounting box (3) has mounting grooves on both sides inside. Mounting plates (14) are vertically fixed in the mounting grooves. Guide rings (15) are fixed on the opposite sides of the two mounting plates (14). Multiple first guide grooves are equidistantly opened on the periphery of the guide rings (15). A positioning groove is horizontally opened through the middle of the mounting box (3) and the mounting plates (14). The mounting groove is connected to the positioning groove. Driven gear rings (13) are rotatably connected to the opposite sides of the two mounting plates (14). The driven gear rings (13) are sleeved on the guide rings (15). Multiple through arc-shaped movable grooves are equidistantly opened on the periphery of the driven gear rings (13). A drive gear (12) is meshed with the upper end of the driven gear rings (13). The drive gear (12) is rotatably connected to the mounting plate (14), and a second motor (11) is installed on the adjacent side of the two drive gears (12). The adjacent side of the second motor (11) is fixed inside the mounting box (3), and the drive shaft of the second motor (11) passes through the mounting plate (14) and is fixedly connected to the drive gear (12). A clamping block (16) is slidably connected in the first guide groove. A rubber block is fixedly connected to the adjacent end of a plurality of clamping blocks (16) at the same end. The clamping block (16) has an L-shaped cross section, and one end of the clamping block (16) is placed in the movable groove for slidable connection. An observation window (2) is slidably connected in the limiting groove. Drainage holes are equidistantly opened at the rear end of the inner bottom surface of the base (1). Two guide plates (7) are installed in the middle of the inner bottom surface of the base (1). A movable plate is installed at the upper end of the guide plate (7). The rear end of the movable plate is movably hinged to the guide plate (7). The front end of the movable plate is connected to the guide plate (7) through a positioning bolt. A second guide groove is opened between the guide plate (7) and the movable plate. A guide rubber ring (10) is rotatably connected in the second guide groove.

2. The apparatus for machining deep and long blind holes for aerospace spline shafts according to claim 1, characterized in that: The drilling mechanism includes a screw (8) that is laterally rotatably connected in a groove. The other end of the screw (8) is provided with a first motor (9). The drive shaft of the first motor (9) is connected to the screw (8) through a coupling. The first motor (9) is fixed to the base (1) through a mounting bracket. A slider (4) is threadedly connected to the screw (8). The rear end of the slider (4) is placed in the groove and slides. An electric spindle (5) is fixed to the front end of the slider (4). A drill rod (17) is connected to one side of the electric spindle (5) through a coupling.

3. The apparatus for machining deep and long blind holes for aerospace spline shafts according to claim 2, characterized in that: The rear end of the electric spindle (5) is connected to a rotary connector (6) via a flange. The other side of the rotary connector (6) is connected to a cutting fluid input pipe. A through-flow fluid guide groove is opened in the drill rod (17), and a V-shaped chip removal groove is opened in the outer side of the drill rod (17). The guide ring (10) is fitted with a guide hole in the drill rod (17).

Images