A broaching device for arc-shaped mortise and tenon grooves

Abstract

The present invention discloses a broaching device for an arc-shaped tenon groove, which relates to the field of mechanical processing. The device comprises a broaching disc, a turbine disc drive mechanism, and a turbine disc clamping mechanism. The broaching disc is connected to the broaching disc drive mechanism. The broaching disc comprises a broaching disc base and a sliding broaching tool holder. The surface of the broaching disc base is provided with multiple linear guides, and a lead screw is installed in the linear guide. One end of the lead screw is connected to the broaching tool drive mechanism. The sliding broaching tool holder is threadedly engaged with the lead screw, and one or more broaches are mounted on the sliding broaching tool holder. The turbine disc drive mechanism comprises a turbine disc rotating mechanism and a turbine disc telescopic mechanism. The turbine disc is mounted on the turbine disc rotating mechanism, and the turbine disc rotating mechanism is connected to the turbine disc telescopic mechanism. The turbine disc clamping mechanism comprises a bidirectional slide rail structure, and the turbine disc telescopic mechanism is fixed to the bidirectional slide rail structure. The present invention can accurately machine an arc-shaped tenon groove that matches the arc radius of the tenon groove, thereby improving processing efficiency and quality.

Description

Technical Field

[0001] The invention relates to the field of mechanical processing, and in particular to a broaching device for arc-shaped tenon grooves. Background Art

[0002] Broaching involves a broaching tool moving linearly along the workpiece surface, removing material layer by layer to ultimately achieve the desired shape and size. It is primarily used to machine various internal and external surfaces, such as keyways, splines, and square holes. Currently, research is ongoing into arc-shaped mortise and tenon broaching, with circularly arranged broaches forming a disc-type base becoming an important research direction. Currently, arc-shaped turbine disc mortise and tenon processing is primarily done by milling, grinding, and electrochemical machining, but these methods are complex and inefficient. For example:

[0003] CN114918482A discloses a process for machining wide tenons in turbine disks. The process involves machining a tenon using a test piece made of the same material as the turbine disk. The tenon is first cut using wire cutting, leaving a margin on one side. High-speed broaching is then used to finalize the final dimensions. The dimensions and technical specifications of the test piece's tenon are checked to ensure they meet the design requirements for a single tenon, verifying the accuracy of the wire cutting procedure and broaching tool. Two symmetrical grooves are then machined on a large test piece. The wire cutting and high-speed broaching process is repeated, and the distance from the tenon's working surface to the center of the turbine disk and the correctness of the inclination angle are checked. After the test piece and large test piece have passed the machining process, the turbine disk is officially machined using the same wire cutting and high-speed broaching process, with all tenons machined to final dimensions. The annular groove at the tenon's mouth is then machined. This process combines wire cutting and broaching for the tenon, but is inefficient and requires changing machining methods during the process.

[0004] CN116728089A discloses a combined laser cutting and broaching process and equipment for turbine disc mortise and tenon grooves. The process includes a frame, a workbench mounted on the frame, a laser cutting module, a broaching module, a thermal imager, and a cooling device. The workbench is used to secure the turbine disc blank and drive it to rotate about its axis. The laser cutting module performs preliminary cutting of the turbine disc blank. The broaching module performs further cutting of the laser-cut turbine disc blank. The thermal imager monitors the temperature of the turbine disc blank. The cooling device cools the laser-cut turbine disc blank. This process combines laser cutting and broaching, but heat accumulation is prone to occur during laser cutting, which can easily lead to surface burns and makes it difficult to ensure machining accuracy.

[0005] CN204818258U discloses a broaching machine and broach for machining circular arc grooves, comprising a broach, a broach driving mechanism for driving the broach, and a workpiece positioning mechanism for positioning a workpiece. The broach comprises a turntable and a tooth portion connected to the turntable; the tooth portion comprises a plurality of teeth distributed between a first end and a second end of the tooth portion; and the broach driving mechanism is configured to drive the broach to rotate about a first axis to machine a circular arc groove on the workpiece. The teeth are integrated with the machine tool, and the broach needs to be replaced as a whole when worn, which is inconvenient to install. Frequent adjustment of the tool position and cutting parameters limits the cutting speed, resulting in low machining efficiency. Furthermore, the tool needs to be replaced as a whole when worn, which is costly. Furthermore, broaching of circular arc grooves of different sizes is not possible.

[0006] Therefore, the main problems in the current turbine disc tenon and groove processing include: 1. The current arc tenon and groove processing mainly adopts milling processing, which has low processing efficiency, poor tenon and groove processing accuracy and surface integrity; 2. Due to factors such as the easy deviation of the arc degree and chord length of the arc tenon and groove, and the easy fluctuation of the depth and width dimensions, the existing broaching tools are not suitable for processing arc-shaped tenon and groove. Summary of the Invention

[0007] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a circular arc mortise broaching device that can accurately machine a circular arc mortise that matches the arc radius of the mortise, thereby improving machining efficiency and quality.

[0008] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0009] An embodiment of the present invention provides a broaching device for an arc-shaped tenon groove, comprising:

[0010] A broaching disc is connected to a broaching disc drive mechanism. The broaching disc includes a broaching disc base and a sliding broaching handle. A plurality of linear guide rails are provided on the surface of the broaching disc base. A lead screw is installed in the linear guide rail. One end of the lead screw is connected to the broaching disc drive mechanism. The sliding broaching handle is threadedly matched with the lead screw. One or more broaches are installed on the sliding broaching handle.

[0011] The turbine disc driving mechanism includes a turbine disc rotating mechanism and a turbine disc telescopic mechanism, wherein the turbine disc is mounted on the turbine disc rotating mechanism, and the turbine disc rotating mechanism is connected to the turbine disc telescopic mechanism;

[0012] The turbine disc clamping mechanism comprises a bidirectional slide rail structure, and the turbine disc telescopic mechanism is fixed to the bidirectional slide rail structure.

[0013] As a further implementation, the linear guide rails are arranged radially along the broaching disc base, and a plurality of linear guide rails are evenly distributed along the circumference of the broaching disc base.

[0014] As a further implementation, the broach drive mechanism includes a transmission gear, a drive gear and a first drive motor, the transmission gear is connected to one end of the lead screw, and the transmission gear is meshed with the drive gear, and the drive gear is connected to the first drive motor.

[0015] As a further implementation, the sliding broach handle includes a handle base, two baffles are arranged opposite to each other on the top of the handle base, and a broach installation space is formed between the two baffles.

[0016] As a further implementation method, a groove is formed on the top of the sliding broach handle, a plurality of partitions are distributed in the groove, and positioning grooves are formed between adjacent partitions; the broach is arranged in the positioning groove.

[0017] As a further implementation, the broach is a multi-tool structure, comprising rough cutting teeth, transition teeth and fine cutting teeth arranged in sequence.

[0018] As a further implementation, a screw is provided on the top of the sliding broach handle, and a threaded hole adapted to the screw is provided on the bottom of the broach.

[0019] As a further implementation, the sliding broach handle includes a handle base, a spring sleeve and a spring collet. The handle base is threadedly connected to the spring sleeve, and multiple spring collets are clamped on the inner side of the spring sleeve to form an installation space for the broach handle.

[0020] As a further implementation, the inner wall of the spring jacket is provided with a limiting groove, and the spring chuck is provided with a limiting ring adapted to the limiting groove.

[0021] As a further implementation, the turbine disc telescopic mechanism includes an inner cylinder and an outer cylinder that are sleeved together, the inner side of the inner cylinder is threadedly connected to a screw, and the screw passes through the outer cylinder to connect to a drive motor;

[0022] The inner cylinder is fixed to the turbine disk, and the outer cylinder is fixed to the turbine disk clamping mechanism.

[0023] The beneficial effects of the present invention are as follows:

[0024] (1) The present invention includes a broaching disc, a turbine disc driving mechanism and a turbine disc clamping mechanism. The broaching disc can rotate under the action of the broaching disc driving mechanism. Under the joint action of the turbine disc driving mechanism and the turbine disc clamping mechanism, the turbine disc can perform three-dimensional spatial motion in addition to its rotation. Thus, the broaching disc and the broach can cooperate to achieve stable processing of the arc-shaped mortise and tenon.

[0025] (2) The broaching disc of the present invention itself has a circular profile. By controlling the rotation and feed motion of the broaching disc, a circular arc-shaped mortise that matches the arc radius of the mortise can be accurately processed. For circular arc mortise with different curvature radii, it is only necessary to select a broach with a matching radius. When the broaching disc processes the circular arc-shaped mortise, its cutting edge cuts continuously in the circumferential direction. The continuous cutting method can make the processed surface smoother.

[0026] (3) The broaching disc of the present invention is provided with a plurality of linear guide rails, which are engaged with the sliding broaching tool holder through a lead screw in the linear guide rail, and the lead screw connects the transmission gear and the driving gear. Under the action of the gear meshing and the lead screw transmission, the sliding broaching tool holder is stably displaced, thereby realizing the adjustment of the radius of the circular arc tenon groove of the turbine disc to meet the processing requirements of the circular arc tenon groove of the turbine disc of different sizes; and the sliding broaching tool holder is provided in various forms, and one or more broaches can be installed, thereby increasing the scope of application of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0028] Figure 1 is a schematic diagram of the overall structure of a broaching device according to one or more embodiments of the present invention;

[0029] Figure 2 is an exploded view of a broaching disc drive mechanism according to one or more embodiments of the present invention;

[0030] Figure 3 is an exploded view of a turbine disk drive mechanism according to one or more embodiments of the present invention;

[0031] Figure 4 is an exploded view of a turbine disk clamping mechanism according to one or more embodiments of the present invention;

[0032] FIG5( a ) is a schematic diagram of the structure of a broaching disc according to one or more embodiments of the present invention;

[0033] FIG5( b ) is a schematic diagram of the meshing of a transmission gear and a driving gear according to one or more embodiments of the present invention;

[0034] Figure 5(c) is a front view of the broach according to embodiment 1 of the present invention;

[0035] Figure 5(d) is a perspective view of the broach according to embodiment 1 of the present invention;

[0036] FIG6( a ) is a schematic diagram of the installation of a lead screw and a linear guide rail according to one or more embodiments of the present invention;

[0037] FIG6( b ) is a schematic diagram of the installation of a sliding broach handle and a lead screw according to one or more embodiments of the present invention;

[0038] FIG7( a ) is a schematic diagram of the base structure of a broach disc according to one or more embodiments of the present invention;

[0039] FIG7( b ) is a partial schematic diagram of a linear guide rail according to one or more embodiments of the present invention;

[0040] FIG8( a ) is a perspective view of a sliding broach handle according to Example 1 of the present invention;

[0041] FIG8( b ) is a top view of the sliding broach handle of Example 1 of the present invention;

[0042] Figure 9 is a schematic diagram of a drive gear structure according to one or more embodiments of the present invention;

[0043] Figure 10 is a schematic structural diagram of a screw sleeve according to one or more embodiments of the present invention;

[0044] FIG11( a ) is an isometric view of an inner barrel according to one or more embodiments of the present invention;

[0045] FIG11( b ) is a cross-sectional view of an inner cylinder according to one or more embodiments of the present invention;

[0046] FIG12( a ) is an isometric view of an outer cylinder according to one or more embodiments of the present invention;

[0047] FIG12( b ) is a cross-sectional view of an outer cylinder according to one or more embodiments of the present invention;

[0048] Figure 13 2 is a schematic diagram of the broach structure of Example 2 of the present invention;

[0049] FIG14( a ) is a front view of the installation of the broach and the sliding broach handle according to Example 2 of the present invention;

[0050] Figure 14(b) is a side view of the broach and the sliding broach handle installed in Example 2 of the present invention;

[0051] FIG14( c ) is a top view of the broach and the sliding broach handle of Example 2 of the present invention;

[0052] Figure 15 (a) is a perspective view of a sliding broach handle according to Example 2 of the present invention;

[0053] Figure 15(b) is a top view of the sliding broach handle of Example 2 of the present invention;

[0054] Figure 16 Schematic diagram of the installation of the broach according to embodiment 3 of the present invention;

[0055] Figure 17 1 is a schematic structural diagram of a sliding broach handle according to embodiment 3 of the present invention;

[0056] Figure 18 2 is a schematic diagram of the broach structure of Example 3 of the present invention;

[0057] Figure 19 1 is a schematic structural diagram of a sliding broach handle according to embodiment 4 of the present invention;

[0058] FIG20( a ) is a schematic structural diagram of a handle base according to Example 4 of the present invention;

[0059] Figure 20 (b) is a cross-sectional view of the handle base of Example 4 of the present invention;

[0060] FIG21( a ) is a schematic structural diagram of a spring jacket according to Example 4 of the present invention;

[0061] FIG21( b) is a cross-sectional view of a spring jacket according to Example 4 of the present invention;

[0062] Figure 22 It is a schematic diagram of the broach structure of embodiment 4 of the present invention.

[0063] FIG23( a ) is a front view of a spring chuck according to embodiment 4 of the present invention;

[0064] FIG23( b ) is a side view of a spring chuck according to Example 4 of the present invention;

[0065] FIG23( c ) is an axonometric view of a spring chuck according to Example 4 of the present invention;

[0066] Among them, I, broaching disc, II, turbine disc driving mechanism, III, turbine disc clamping mechanism;

[0067] I-1, screw, I-2, cover plate, I-3, drive gear, I-4, flange, I-5, broach base, I-6, first drive motor, I-7, bearing, I-8, transition shaft, I-9, coupling, I-10, reducer, I-11, second drive motor, I-12, encoder, I-13, broach, I-14, transmission gear, I-15, positioning hole, I-16, broach end face, I-17, set screw, I-18, shaft end retaining ring, I-19, mounting hole, I-20, sliding broach handle, I -21, axial positioning hole, I-22, lead screw, I-23, spherical bearing, I-24, linear guide, I-25, lead screw sleeve, I-26, partition, I-27, positioning groove, I-28, positioning hole, I-29, rough-cut teeth, I-30, transition teeth, I-31, fine-cut teeth, I-32, screw, I-33, external thread, I-34, internal thread, I-35, spring sleeve, I-36, limit ring, I-37, spring chuck end face, I-38, spring chuck, I-39, tool holder, I-40, limit groove;

[0068] II-1, cover plate, II-2, turbine disk, II-3, vibration sensor, II-4, flange, II-5, third drive motor, II-6, controller, II-7, inner cylinder, II-8, threaded rod, II-9, outer cylinder, II-10, universal joint coupling, II-11, fourth drive motor;

[0069] III-1, horizontal slide rail, III-2, slider, III-3, longitudinal slide rail, III-4, support plate, III-5, connecting hole. DETAILED DESCRIPTION

[0070] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0071] Example 1:

[0072] This embodiment provides a broaching device for an arc-shaped tenon groove, such as Figure 1 and Figure 2 As shown, it includes a broaching disc I, a turbine disc driving mechanism II and a turbine disc clamping mechanism III. The broaching disc I is connected to the turbine disc driving mechanism II, the turbine disc driving mechanism II is installed on the turbine disc clamping mechanism III, and the turbine disc clamping mechanism III is arranged on one side of the broaching disc I.

[0073] The upper surface of the broaching disc 1 is provided with a plurality of evenly distributed linear guide rails 1-24. The linear guide rails 1-24 are arranged along the radial direction of the broaching disc 1. A lead screw 1-22 is installed in the linear guide rail 1-24. The sliding broaching handle 1-20 is threadedly engaged with the lead screw 1-22 to form a lead screw nut mechanism. The broach 1-13 is assembled on the sliding broaching handle 1-20. The broach 1-13 can be a single-blade structure, that is, only one broaching blade 1-13 is installed on each sliding broaching handle 1-20 to achieve the overall broaching of the arc-shaped mortise and tenon. Of course, in other embodiments, the broach 1-13 can also be a multi-blade structure to improve processing efficiency. Alternatively, the broach 1-13 can be a mixed blade structure, with different numbers of blades set according to different broaching allowances, thereby improving broaching efficiency and broaching accuracy.

[0074] When broaching circular arc tenons of different radii, the lead screw I-22 is driven to rotate, so that the broach I-13 is fed along the sliding broach handle I-20 on the linear guide rail I-24, and the broach I-13 is moved to the required radius position before the broaching action is performed; thereby, the radius of the circular arc tenon of the turbine disk II-2 is adjusted to meet the processing requirements of the circular arc tenon of the turbine disk II-2 of different sizes.

[0075] The broaching disc I is connected to the broaching disc drive mechanism. When it is detected that the turbine disc II-2 moves to the set position, the broaching disc drive mechanism drives the broaching disc I to rotate at the set speed for broaching. Figure 2 As shown, the broaching disc drive mechanism includes a second drive motor I-11 and a reducer I-10. The reducer I-10 is mounted at the output end of the second drive motor I-11. The reducer I-10 is connected to one end of a transition shaft I-8 via a coupling I-9. The other end of the transition shaft I-8 is connected to the broaching disc I via a bearing I-7. In this embodiment, the second drive motor I-11 is a servo motor and is equipped with an encoder I-12.

[0076] As shown in FIG6(a) and FIG6(b), a screw sleeve I-25 is provided in the linear guide rail I-24. Figure 10 As shown, its cross-section is semicircular. Screw I-22 engages with screw sleeve I-25 via spherical bearing I-23, allowing screw I-22 to rotate within linear guide rail I-24. In this embodiment, the screw I-22 is installed with an accuracy of ±0.05 mm, ensuring that the center of rotation of the screw I-22 coincides with the axis of the entire transmission system.

[0077] The sliding broach handle 1-20 can be clamped or externally threaded. The appropriate sliding broach handle 1-20 can be selected according to different materials, broaching parameters, etc. In this embodiment, as shown in Figures 8(a) and 8(b), the sliding broach handle 1-20 includes a handle base. The bottom of the handle base is provided with threads that are compatible with the lead screw 1-22. Two baffles are arranged on the top of the handle base, forming a broach installation space between the two baffles; the baffles are arranged in the axial direction of the lead screw 1-22. In the other direction perpendicular to the baffle installation direction (the radial direction of the lead screw 1-22), there is a raised structure, which cooperates with the slot on the side wall of the linear guide 1-24 (as shown in Figures 7(a) and 7(b)).

[0078] When assembled with the broach I-13, the side without the baffle fits tightly against the broach disc base I-5, while the side with the baffle tightly wraps around the broach I-13 and is fixed to the handle base with screws. The broaches I-13 are evenly distributed around the center of the broach disc I, as shown in Figures 5(c) and 5(d). The broaches I-13 are flanked by broach end faces I-16. Mounting holes I-19 are provided at the bottom handle of the broach I-13. These mounting holes I-19 correspond to the axial positioning holes I-21 of the sliding broach handle I-20, which are then connected via connectors. The broach end face I-16 can be arc-shaped, or can be a complex shape such as a gradient arc or a three-dimensional arc surface, depending on the arc-shaped mortise and tenon to be machined.

[0079] As shown in Figure 5(a) and Figure 5(b), the lead screw I-22 is connected to the transmission gear I-14. Shaft end retaining rings I-18 are provided at both ends of the transmission gear I-14. The shaft end retaining rings I-18 are fixed by set screws I-17, and the set screws I-17 can be used to prevent loosening. Each transmission gear I-14 is engaged with the drive gear I-3, as shown in Figure 5(a) and Figure 5(b). Figure 9 As shown, the driving gear I-3 is circular as a whole, with a positioning hole I-15 in the center, and gear teeth are provided on the edge of the driving gear I-3, and the transmission gear I-14 is engaged with the gear teeth; the driving gear I-3 is connected to the first driving motor I-6, and the transmission gear I-14, the driving gear I-3 and the first driving motor I-6 constitute a broach driving mechanism, and the first driving motor I-6 drives the driving gear I-3 to rotate, and drives the transmission gear I-14 to rotate under the meshing action, thereby rotating the screw I-22.

[0080] like Figure 2 As shown, a cover plate I-2 is located on the upper side of the drive gear I-3, and a flange I-4 is located on the lower side. The cover plate I-2, drive gear I-3, and flange I-4 are connected by screws I-1. Flange I-4 is fixedly connected to the first drive motor I-6, which is located at the end face of the transition shaft I-8 to ensure the concentricity and stability of the entire drive device.

[0081] The turbine disc drive mechanism II includes a turbine disc rotating mechanism and a turbine disc telescopic mechanism. The turbine disc II-2 is installed on the turbine disc rotating mechanism, and the turbine disc rotating mechanism is connected to the turbine disc telescopic mechanism, so that the turbine disc II-2 can be rotated and its position can be changed horizontally. Figure 3 As shown, the turbine disk rotation mechanism of this embodiment is realized by the third drive motor II-5, the third drive motor II-5 is connected to the flange II-4, the turbine disk II-2 is installed between the flange II-4 and the cover plate II-1, and the turbine disk II-2 is driven to rotate by the third drive motor II-5.

[0082] The turbine disc telescopic mechanism includes an inner cylinder II-7, an outer cylinder II-9 and a threaded rod II-8, and one end of the inner cylinder II-7 is inserted into the outer cylinder II-9; as shown in Figures 12(a) and 12(b), the outer cylinder II-9 is provided with a accommodating chamber that cooperates with the inner cylinder II-7, and a through hole connected to the accommodating chamber; as shown in Figures 11(a) and 11(b), the inner cylinder II-7 is a cylindrical structure as a whole, and a through hole is opened in the center of the inner cylinder II-7; the threaded rod II-8 passes through the through hole of the inner cylinder II-7 and the through hole of the outer cylinder II-9, and is connected to the fourth drive motor II-11 through the universal joint coupling II-10 provided on the outside of the outer cylinder II-9. Among them, the through hole is a threaded hole, so that the inner cylinder II-7 and the threaded rod II-8 form a threaded fit. When the fourth drive motor II-11 drives the threaded rod II-8 to rotate, the inner cylinder II-7 is extended and retracted relative to the outer cylinder II-9, thereby changing the horizontal position of the turbine disk II-2, that is, by controlling the telescopic movement of the turbine disk telescopic mechanism, the turbine disk II-2 is driven to achieve feed and retract, thereby meeting the needs of different processing stages.

[0083] It is understandable that in other embodiments, the turbine disc telescopic mechanism may also be implemented in other ways.

[0084] The turbine disk II-2 is equipped with a vibration sensor II-3. The vibration sensor II-3 and the third drive sensor II-8 are respectively connected to the controller II-6 through wires. The vibration sensor II-3 detects the vibration state of the turbine disk II-2. The controller II-6 receives the signal and feeds it back to the third drive sensor II-8. The third drive sensor II-8 adjusts the speed of the turbine disk II-2 or stops the processing process.

[0085] like Figure 4As shown, the turbine disc clamping mechanism III includes a bidirectional slide rail structure, comprising a transverse slide rail III-1 and a longitudinal slide rail III-3. The longitudinal slide rail III-3 is slidably connected to the transverse slide rail III-1 via a slider III-2, and a support plate III-4 is slidably connected to the longitudinal slide rail III-3. The support plate III-4 has a connecting hole III-5, which is adapted to the diameter of the outer cylinder II-9. The outer cylinder II-9 is installed in the connecting hole III-5 with the axis aligned, allowing the turbine disc II-2 to move in both the transverse and longitudinal directions. After the turbine disc II-2 is installed in the turbine disc clamping mechanism III, the turbine disc II-2 is controlled to move to the feed position of the broaching disc I.

[0086] The working process of the broaching device in this embodiment is as follows:

[0087] Step 1: Clean the surface of the workpiece to be processed.

[0088] Step 2: Installation:

[0089] Install the broach I-13 on the broach disc I, install the turbine disc II-2 on the turbine disc clamping mechanism III, and check the installation accuracy.

[0090] Step 3: Broaching process:

[0091] Move the turbine disc II-2 to the initial broaching position of the broaching disc I; the first drive motor I-6 moves the broaching disc I-13 to the required radius for arc tenon broaching through the engagement of the transmission gear I-14 and the drive gear I-3, and sets the broaching parameters; start the broaching disc I, and complete the first arc tenon broaching after the broaching disc I rotates one circle; then the turbine disc II-2 rotates a certain angle to the next tenon to be processed, drives the broaching disc I to rotate for arc tenon broaching, and repeats the above steps until all tenon broaching is completed.

[0092] Among them, the broaching parameters include broaching feed speed and broaching depth, which are determined according to the turbine disk II-2 material and the mortise and tenon processing requirements; in this embodiment, the broaching stage feed speed is set to 2-20m / min; and the cutting depth is set to 0.1-1mm.

[0093] The broaching disc I of this embodiment inherently has a circular profile. By controlling its rotation and feed motion, it can precisely machine a circular mortise that matches the mortise's arc radius. For mortise arcs with different radii of curvature, simply select a broach I-13 with a matching radius. When machining the circular mortise, the broaching disc I-13's cutting edge continuously cuts in a circular direction, resulting in a smoother machined surface. Compared to broaches with non-broaching disc structures, the more evenly distributed mass produces less vibration during cutting, and the broaching disc exhibits better balance during rotation.

[0094] The turbine disc clamping mechanism III of this embodiment cooperates with the turbine disc driving mechanism II to realize linear movement of the three-dimensional spatial coordinate axis, that is, precise displacement of the turbine disc II-2 in the vertical direction, horizontal direction and horizontal direction; the turbine disc II-2 also has rotational movement, thereby realizing all-round movement in space.

[0095] Example 2:

[0096] This embodiment provides a broaching device for an arc-shaped tenon groove, as shown in FIG15(a) and FIG15(b). In this embodiment, the sliding broach handle I-20 includes not only a handle base but also a broach mounting seat. The top of the broach mounting seat is grooved, and a plurality of partitions I-26 are evenly distributed in the groove. Positioning grooves I-27 are formed between adjacent partitions I-26. Figure 14(a)-Figure 14(c) As shown, the broach I-13 is installed in the positioning groove I-27, that is, the sliding broach handle I-20 of this embodiment is equipped with multiple broaches I-13.

[0097] like Figure 13 As shown, the teeth of broach I-13 are divided into roughing teeth I-29, transition teeth I-30, and finishing teeth I-31. The overall tooth structure of the roughing teeth is triangular, which can be further divided and subdivided into multiple blades for quickly removing most of the excess on the workpiece. The transition teeth I-30 are located between the roughing teeth I-29 and the finishing teeth I-31, playing a transition and connecting role. A number of triangular teeth are arranged on both sides of the transition teeth I-30, with a tooth lift between the roughing teeth I-29 and the finishing teeth I-31, for gradually reducing the cutting thickness. The finishing teeth I-31 are located at the end of the cutting part and are mainly used to complete the final finishing of the workpiece. The tooth shape on both sides is curved, and the tooth lift is small (usually 0.005 to 0.015 mm).

[0098] The other structures are the same as those in Example 1 and will not be described again here.

[0099] Example 3:

[0100] This embodiment provides a broaching device for an arc-shaped tenon groove. In this embodiment, as Figure 17 As shown, the sliding broach handle I-20 adopts an external thread type, and a screw I-32 is provided on the top of the sliding broach handle I-20; Figure 18 As shown, the bottom of the broach I-13 is provided with a threaded hole adapted to the screw rod I-32. When assembling the broach I-13, the broach I-13 is rotated and screwed into the interior of the sliding broach handle I-20 to form a Figure 16 The assembly structure shown.

[0101] Among them, the length of the screw rod I-32 increases in sequence according to the height of the broach I-13, and the height of the screw rod I-32 is more than two-thirds of the overall length of the broach I-13.

[0102] The other structures are the same as those in Example 1 and will not be described again here.

[0103] Example 4:

[0104] This embodiment provides a broaching device for an arc-shaped tenon groove. In this embodiment, as shown in Figures 20(a) and 20(b), the sliding broach handle I-20 includes a handle base, a cylindrical structure is provided on the top of the handle base, and the cylindrical structure is provided with an external thread I-33; as shown in Figure 23, a cylindrical protrusion is provided at the bottom of the broach I-13, namely the handle I-39, and an installation space for the handle I-39 is reserved at the center of the sliding broach handle I-20.

[0105] The spring collet I-38 is installed at the cylindrical structure of the sliding broach handle I-20 through the spring sleeve I-35, as shown in Figure 21(a) and Figure 21(b). The spring sleeve I-35 is a cylindrical structure as a whole, and is provided with an internal thread I-34 that is compatible with the external thread I-33. A limiting groove I-40 is provided near one end. The limiting groove I-40 is an annular groove provided along the inner wall of the spring sleeve I-35.

[0106] As shown in Figures 23(a), 23(b) and 23(c), the spring chuck I-38 is an elastic cylindrical component with evenly distributed longitudinal grooves on its circumference, so that the spring chuck I-38 can produce elastic deformation when subjected to external force; and a limiting ring I-36 is provided on the outer ring of the spring chuck I-38. The limiting ring I-36 is arranged near one end of the spring chuck I-38, so that the spring chuck I-38 is divided into two relatively arranged frustum-shaped structures, so that it can cooperate with the spring sleeve I-35 due to its elastic action.

[0107] When assembling the broach I-13, first install the spring chuck I-38 into the spring sleeve I-35, so that the limiting ring I-36 is stuck in the limiting groove I-40, and the spring chuck end face I-37 is aligned with the spring sleeve I-35. Align the spring chuck I-38 with the internal hole position of the sliding broach handle I-20, and screw the spring sleeve I-35 into the sliding broach handle I-20. Finally, insert the handle I-39 of the broach I-13 into the inner hole of the spring chuck I-38, so that the inner wall of the spring chuck I-38 is in close contact with the outer wall of the handle I-39.

[0108] The other structures are the same as those in Example 1 and will not be described again here.

[0109] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A broaching device for an arc-shaped mortise and tenon groove, characterized in that: include: A broaching disc connected to a broaching disc drive mechanism, wherein the broaching disc comprises a broaching disc base and a sliding broaching handle. A plurality of linear guide rails are provided on the surface of the broaching disc base, and a lead screw is installed in the linear guide rail. One end of the lead screw is connected to the broaching disc drive mechanism; The linear guide rails are arranged radially along the base of the broaching disc, and a plurality of linear guide rails are evenly distributed along the circumference of the base of the broaching disc; The sliding broach handle is threadably matched with the lead screw, and the sliding broach handle is provided with one or more broaches; The broach is a multi-tool structure, comprising rough cutting teeth, transition teeth and fine cutting teeth arranged in sequence; The top of the sliding broach handle is grooved, and a plurality of partitions are distributed in the groove, and positioning grooves are formed between adjacent partitions; the broach is arranged in the positioning groove; The turbine disc driving mechanism includes a turbine disc rotating mechanism and a turbine disc telescopic mechanism, wherein the turbine disc is mounted on the turbine disc rotating mechanism, and the turbine disc rotating mechanism is connected to the turbine disc telescopic mechanism; The turbine disc telescopic mechanism comprises an inner cylinder and an outer cylinder which are sleeved together, wherein the inner side of the inner cylinder is threadedly connected to a screw, and the screw passes through the outer cylinder and is connected to a drive motor; Wherein, the inner cylinder is fixed to the turbine disk, and the outer cylinder is fixed to the turbine disk clamping mechanism; The turbine disc clamping mechanism comprises a bidirectional slide rail structure, and the turbine disc telescopic mechanism is fixed to the bidirectional slide rail structure.

2. A broaching device for an arc-shaped tenon groove according to claim 1, characterized in that: The broach driving mechanism includes a transmission gear, a driving gear and a first driving motor. The transmission gear is connected to one end of the lead screw and meshes with the driving gear. The driving gear is connected to the first driving motor.

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