Main transmission device of large turbine disc mortise broaching machine

Abstract

The invention relates to the technical field of broaching machines, and particularly discloses a large turbine disc mortise broaching machine main transmission device which comprises a machine shell, a machine cover is hinged to the top of the machine shell, a notch is formed in the surface of the machine cover, strip-shaped openings are formed in the two sides of the machine shell, and a surrounding plate is fixedly installed on the inner bottom wall of the machine shell. According to the main transmission device of the large turbine disc mortise broaching machine, the displacement driving motor drives the lead screw to rotate, the lead screw drives the two lead screw sleeves to synchronously draw close, and the rack assembly, the driving assembly and the cleaning assembly can slide on the sliding rods through the sliding sleeves to be folded; and the main transmission motor drives the driving helical teeth to rotate, the driving helical teeth drive the rack shell, the sliding strip and the broach to slide in the guide rail shell, and the side face of the broach makes contact with the outside of the turbine disc, so that broaching and cutting are achieved, and the purpose of conveniently cutting the outer surface of the turbine disc is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of broaching machines, in particular to a main transmission device of a large turbine disc tongue and groove broaching machine. Background Art

[0002] As a key component of aircraft engines and gas turbines, the turbine disc is made of high-temperature alloy, which has material properties such as high strength, high heat resistance, and low heat transfer coefficient. It has high requirements for processing accuracy and surface performance.

[0003] The prior art discloses a high-stability driving device for a CNC broaching machine and a method of using the device, comprising a base, a clamping mechanism and an auxiliary driving mechanism, wherein a groove is provided on the upper surface of the base, and an electric hydraulic cylinder is provided on the right inner wall of the groove, one end of a hydraulic telescopic rod is slidably connected to the inner wall of the electric hydraulic cylinder, and the other end of the hydraulic telescopic rod is fixedly connected to the right outer wall of a slider, wherein the left outer wall of the slider is detachably connected to the clamping mechanism by means of bolts provided; the present invention realizes a clamping fixation suitable for materials of various sizes through the clamping mechanism, and the clamping speed is fast and stable, and also realizes that the friction between the slider and the slide rail can be kept balanced under the action of the auxiliary driving mechanism, so that the slider can slide stably on the slide rail, thereby improving the use speed and use effect of the CNC broaching machine, ensuring the stable drive operation of the device, and being suitable for being widely promoted and used.

[0004] The above document has the following defects: the broaching machine is driven by a hydraulic rod and can only cut the inner wall of the workpiece, but is not convenient for cutting the outer surface of the turbine disc. At the same time, after the broaching cuts, iron filings remain on the surface, which will affect the next use if not cleaned in time. Summary of the invention

[0005] In order to solve the above technical problems existing in the existing turbine disk processing process, the present invention provides a main transmission device of a large turbine disk tenon and groove broaching machine, which has the advantages of conveniently cutting the outer surface of the turbine disk and cleaning the debris on the broach surface.

[0006] The technical solution of the present invention is as follows: a main transmission device of a large turbine disc tongue and groove broaching machine comprises a casing, a cover is hingedly connected to the top of the casing, a notch is provided on the surface of the cover, strip openings are provided on both sides of the casing, a panel is fixedly installed on the inner bottom wall of the casing, a protective shell is fixedly installed on the inner side of the panel, a turbine disc fixing assembly is arranged inside the protective shell for clamping the turbine disc; a displacement assembly is arranged on the inner bottom wall of the casing, a rack assembly is slidably installed above the displacement assembly, a driving assembly is arranged on the side of the rack assembly for driving displacement of the rack assembly; a cleaning assembly is provided on the outer side of the rack assembly for cleaning the tooth gap of the rack assembly.

[0007] Preferably, the turbine disc fixing assembly includes a top shell and a bottom shell, the top shell and the bottom shell are telescopically connected by two symmetrically arranged pneumatic rods A, the inner sides of the top shell and the bottom shell are rotatably connected to the drive rollers, the shaft end of the drive roller is fixedly connected to the output end of the drive motor, the inner part of the top shell and the bottom shell and the inner side of the drive roller are fixedly inserted with a pneumatic rod B, the output end of the pneumatic rod B is fixedly installed with a displacement splint, the surface of the top shell and the bottom shell is fixedly installed with a fixed splint located between the two pneumatic rods A, and a ball is movably installed between the opposite surfaces of the displacement splint and the fixed splint.

[0008] Preferably, the bottom shell is installed inside the protective shell, the two pneumatic rods A are connected by a connecting rod, the drive rollers extend to the outside of the top shell and the bottom shell respectively, and the turbine disk is placed between the four drive rollers, and an opening corresponding to the turbine disk is opened on the top of the protective shell, the output end of the pneumatic rod B passes through and extends to the outside, the displacement clamp and the drive motor are located on the same side, and the drive motor is respectively mounted on the outer surfaces of the top shell and the bottom shell.

[0009] Preferably, the displacement assembly includes three pairs of support seats arranged at equal intervals and installed on the inner bottom wall of the casing, a sliding rod is inserted between the left and right pairs of support seats, a sliding sleeve is mounted on the outer side of the sliding rod, a screw rod is inserted between the middle pair of support seats, a limiting ring is fixedly installed on the middle ends of the sliding rod and the screw rod, a screw rod sleeve is threadedly connected to the outer side of the screw rod, two thread grooves with opposite threads are opened on the outer surface of the screw rod, a transmission gear is fixedly installed on the outer side of the screw rod and close to the support seat, a driving gear is meshed on the side of the transmission gear, the axis of the driving gear is fixedly connected to the output end of the displacement drive motor, and the bottom of the displacement drive motor is fixedly connected to the inner wall of the casing through a connecting plate.

[0010] Preferably, the rack assembly includes a guide rail shell, both ends of the guide rail shell are inserted into the strip-shaped opening, the bottom of the guide rail shell is fixedly connected to the sliding sleeve and the screw sleeve respectively, the rack shell is slidably installed inside the guide rail shell, the sliding bar is slidably installed inside the rack shell, a broach is fixedly installed on the side of the sliding bar, a spring 1 is embedded on the side of the sliding bar close to the rack shell, a chuck is fixedly installed on the other end of the spring 1, limiting sliders corresponding to the sliding bar are slidably installed on both ends of the rack shell, and a locking bolt is threadedly connected to the side of the rack shell.

[0011] Preferably, the internal groove of the rack housing and the outer cross-section of the slide bar are in an I-shape, the upper and lower surfaces of the broach are provided with limiting grooves, the inner wall of the guide rail housing is fixedly installed with a limiting strip corresponding to the limiting groove, the inner wall of the rack housing is provided with a clamping groove corresponding to the clamping head, one end of the locking bolt extends to the side threaded hole of the limiting slider, and an extension rod is fixedly installed on the surface of the limiting slider.

[0012] Preferably, the driving assembly includes a bracket installed on the side of the rack housing, a driving bevel gear meshing with the side of the rack housing is rotatably installed inside the bracket, the axis of the driving bevel gear is aligned with the main transmission motor, a lubricating oil shell is sleeved on the outside of the driving bevel gear, an oil shell cover is clamped on the top of the lubricating oil shell, an extrusion plate is arranged inside the lubricating oil shell and below the driving bevel gear, and a spring 2 is fixedly installed on the bottom of the extrusion plate.

[0013] Preferably, a docking port corresponding to the driving bevel gear is opened on the side of the rack housing, and one side of the driving bevel gear extends into the interior of the docking port. The top of the main drive motor is fixedly mounted on the bracket, the lubricating oil shell is semicircular, and an oil filling nozzle is fixedly mounted on the top of the oil shell cover.

[0014] Preferably, the cleaning assembly includes a sliding seat fixedly mounted on the outside of the guide rail shell, a slide plate is slidably mounted inside the sliding seat, a side plate is fixedly mounted on one side of the slide plate, a semicircular shell is fixedly mounted on the other side of the slide plate, a cleaning shaft is rotatably connected inside the semicircular shell, a wire brush is fixedly mounted on the outside of the cleaning shaft, the shaft of the cleaning shaft is fixedly connected to the cleaning motor, the surface of the side plate is detachably mounted on the output end of the cylinder, and the cylinder is fixedly mounted on the side of the guide rail shell.

[0015] The present invention has the following beneficial effects:

[0016] (1) The displacement drive motor drives the screw to rotate, and the screw drives the two screw sleeves to move together synchronously. The rack assembly, the drive assembly and the cleaning assembly will slide and close on the slide rod through the sliding sleeve until the end of the side of the broaching tool without teeth is attached to the outer side of the turbine disk. Then the main drive motor drives the helical gear to rotate, and the helical gear drives the rack housing, the slide bar and the broaching tool to slide in the guide rail housing. The side of the broaching tool contacts the outside of the turbine disk to achieve broaching, thereby facilitating the purpose of cutting the outer surface of the turbine disk;

[0017] (2) The side plate is pushed to slide by the expansion of the cylinder, and the slide plate slides in the slide seat, and the semicircular shell and the cleaning shaft are moved closer to the rack assembly until the wire brush is attached to the side with teeth of the broach, and then the cleaning motor is driven to rotate with the cleaning shaft and the wire brush. The wire brush can effectively clean the residual iron filings on the surface of the broach, thereby achieving the purpose of cleaning the debris on the surface of the broach;

[0018] (3) A lubricating oil shell is installed on the outer side of the driving helical gear. The lubricating oil can be pumped into the inner part of the lubricating oil shell by using the oil filling nozzle on the oil shell cover. Spring 2 will push the extrusion plate upward, pushing the lubricating oil upward to contact the rotating driving helical gear. The driving helical gear is meshed with the tooth groove on the side of the rack shell, thereby reducing the wear between the transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the closed structure of the cover of the present invention;

[0020] Figure 2 This is a schematic diagram of the cover opening structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the present invention after removing the casing;

[0022] Figure 4 This is a schematic diagram of the structure of the present invention after removing the casing;

[0023] Figure 5 It is a schematic diagram of the cutaway structure of the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the displacement assembly of the present invention;

[0025] Figure 7 It is a schematic diagram of the structure of the displacement assembly, rack assembly and drive assembly of the present invention;

[0026] Figure 8 It is a schematic diagram of the exploded structure of the rack assembly and the drive assembly of the present invention;

[0027] Fig. 9 It is a schematic diagram of the exploded structure of the rack assembly and the drive assembly of the present invention;

[0028] Fig.10 For the present invention Fig. 9 Schematic diagram of the structure at A in the middle;

[0029] Fig.11 It is a schematic diagram of the structure of the cleaning assembly and the rack assembly of the present invention;

[0030] Fig.12 It is a schematic diagram of the partial structure of the rack assembly of the present invention;

[0031] Fig.13 This is a schematic diagram of the decomposed structure of the cleaning component of the present invention;

[0032] Fig.14 This is a schematic diagram of the cleaning component structure of the present invention;

[0033] Fig.15 This is a front structural schematic diagram of a turbine disk fixing assembly of the present invention;

[0034] Fig.16 This is a schematic diagram of the back structure of the turbine disk fixing assembly of the present invention;

[0035] Fig.17 This is a schematic diagram of the structure of the turbine disk fixing assembly of the present invention;

[0036] Fig.18 It is a schematic diagram of the structure of the turbine disk fixing assembly of the present invention.

[0037] The symbols in the accompanying drawings are:

[0038] 100- housing; 200- cover; 300- strip-shaped opening; 400- enclosure; 500- housing; 600- turbine disk fixing assembly; 700- displacement assembly; 800- rack assembly; 900- driving assembly; 1000- cleaning assembly;

[0039] 601-top shell; 602-bottom shell; 603-pneumatic rod A; 604-driving roller; 605-driving motor; 606-pneumatic rod B; 607-displacement splint; 608-fixed splint; 609-ball;

[0040] 701-support seat; 702-slide rod; 703-slide sleeve; 704-screw rod; 705-screw rod sleeve; 706-transmission gear; 707-driving gear; 708-displacement drive motor;

[0041] 801-guide rail housing; 802-rack housing; 803-slide bar; 804-broach; 805-spring 1; 806-chuck; 807-limit slider; 808-locking bolt;

[0042] 901- bracket; 902- driving helical gear; 903- main drive motor; 904- lubricating oil shell; 905- oil shell cover; 906- extrusion plate; 907- spring 2;

[0043] 1001-slide seat; 1002-slide plate; 1003-side plate; 1004-semicircular shell; 1005-cleaning shaft; 1006-wire brush; 1007-cylinder; 1008-cleaning motor. DETAILED DESCRIPTION

[0044] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0045] See also Figure 1-5The main transmission device of a large turbine disc tenon-and-groove broaching machine includes a casing 100, a cover 200 hinged on the top of the casing 100, a notch on the surface of the cover 200 for installing the turbine disc; strip openings 300 are provided on both sides of the casing 100 to facilitate the displacement and sliding of the rack assembly 800; a shroud 400 is fixedly installed on the inner bottom wall of the casing 100 for collecting liquid oil sprayed for cooling; a protective shell 500 is fixedly installed on the inner side of the shroud 400, and an opening corresponding to the turbine disc is provided on the top of the protective shell 500 to facilitate the installation of the turbine disc.

[0046] See also Figure 1-5 A turbine disk fixing assembly 600 is arranged inside the protective shell 500 for clamping the turbine disk; a displacement assembly 700 is arranged on the inner bottom wall of the casing 100 for moving the distance between the rack assembly 800 to facilitate the broach to get close to the outer contour of the turbine disk; a rack assembly 800 is slidably installed above the displacement assembly 700 for pulling and cutting the turbine disk; a driving assembly 900 is arranged on the side of the rack assembly 800 for driving and displacing the rack assembly 800; a cleaning assembly 1000 is arranged on the outer side of the rack assembly 800 for cleaning the tooth gap of the rack assembly 800.

[0047] See also Figure 6-7 The displacement assembly 700 includes three pairs of support seats 701 arranged at equal intervals and installed on the inner bottom wall of the casing 100, with two pairs of support seats 701 in a symmetrical arrangement; a slide bar 702 is inserted between the left and right pairs of support seats 701, and a slide sleeve 703 is sleeved on the outer side of the slide bar 702; a screw rod 704 is inserted between the middle pair of support seats 701, and the middle ends of the slide bar 702 and the screw rod 704 are fixedly installed with limit rings, and the outer side of the screw rod 704 is threadedly connected with a screw rod sleeve 705, and the outer surface of the screw rod 704 is provided with two sections of thread grooves with opposite threads, which can control the approach and separation of the screw rod sleeve 705.

[0048] See also Figure 6-7 A transmission gear 706 is fixedly installed on the outer side of the screw rod 704 and at one end close to the support seat 701. A driving gear 707 is meshed with the side of the transmission gear 706. The axis of the driving gear 707 is fixedly connected to the output end of the displacement driving motor 708. The bottom of the displacement driving motor 708 is fixedly connected to the inner wall of the casing 100 through a connecting plate. The displacement driving motor 708 is used to drive the screw rod 704 to rotate, and the two displacement components 700 can be controlled to move closer to and separate from each other along the sliding rod 702.

[0049] See also Figure 8-12The rack assembly 800 includes a guide rail shell 801, both ends of which are inserted into the interior of the strip-shaped opening 300, and the bottom of the guide rail shell 801 is fixedly connected to the sliding sleeve 703 and the screw sleeve 705 respectively. A rack shell 802 is slidably installed inside the guide rail shell 801, and a slide bar 803 is slidably installed inside the rack shell 802. The internal groove of the rack shell 802 and the external cross-section of the slide bar 803 are in the shape of an I-beam, and a broach 804 is fixedly installed on the side of the slide bar 803. The upper and lower surfaces of the broach 804 are provided with limiting grooves, and the inner wall of the guide rail shell 801 is fixedly provided with limiting strips corresponding to the limiting grooves to prevent the broach 804 from rotating itself.

[0050] See also Figure 8-12 A spring 805 is embedded on one side of the slide bar 803 close to the rack housing 802, and a clamping head 806 is fixedly installed on the other end of the spring 805. A groove corresponding to the clamping head 806 is opened on the inner wall of the rack housing 802. When the broach is assembled, when the slide bar 803 is pushed into the interior of the rack housing 802, once a "click" sound of the clamping head 806 hitting the groove is heard, it indicates that the slide bar 803 is installed in place.

[0051] See also Figure 8-12 , limiting sliders 807 corresponding to the slide bar 803 are slidably installed at both ends of the rack housing 802 to prevent the installed slide bar 803 from sliding and running; an extension rod is fixedly installed on the surface of the limiting slider 807, which is convenient for pulling the limiting slider 807 out of the two ends of the rack housing 802 by hand during disassembly; a locking bolt 808 is threadedly connected to the side of the rack housing 802, and one end of the locking bolt 808 extends to the side threaded hole of the limiting slider 807. Once the locking bolt 808 is screwed into the threaded hole, the position of the limiting slider 807 can be locked to prevent it from sliding and deviating.

[0052] See also Figure 9-10 The driving assembly 900 includes a bracket 901 installed on the side of the rack housing 802, and a driving bevel gear 902 meshing with the side of the rack housing 802 is rotatably installed inside the bracket 901. The side of the rack housing 802 is provided with a docking interface corresponding to the driving bevel gear 902, and one side of the driving bevel gear 902 extends into the inside of the docking interface. The axis of the driving bevel gear 902 is fixed to the main transmission motor 903, and the top of the main transmission motor 903 is fixedly installed to the bracket 901. The main transmission motor 903 drives the driving bevel gear 902 to rotate, and the driving bevel gear 902 drives the rack housing 802 and the broach 804 to move forward or backward to achieve cutting of the outer surface of the turbine disc.

[0053] See also Figure 9-10The outer side of the driving bevel gear 902 is provided with a lubricating oil shell 904, which is semicircular, and the top of the lubricating oil shell 904 is clamped with an oil shell cover 905, and the top of the oil shell cover 905 is fixedly provided with an oiling nozzle. An extrusion plate 906 is provided inside the lubricating oil shell 904 and below the driving bevel gear 902, and a second spring 907 is fixedly provided at the bottom of the extrusion plate 906, and the second spring 907 is installed on the inner bottom wall of the lubricating oil shell 904. Once the driving bevel gear 902 rotates, the second spring 907 pushes the extrusion plate 906 upward, and pushes the lubricating oil upward to contact the driving bevel gear 902, thereby reducing the mutual wear between the driving bevel gear 902 and the rack housing 802.

[0054] See also Figure 13-14 The cleaning component 1000 includes a slide seat 1001 fixedly installed on the outside of the guide rail shell 801, a slide plate 1002 is slidably installed inside the slide seat 1001, a side plate 1003 is fixedly installed on one side of the slide plate 1002, and a semicircular shell 1004 is fixedly installed on the other side of the slide plate 1002, and a cleaning shaft 1005 is rotatably connected inside the semicircular shell 1004, a wire brush 1006 is fixedly installed on the outside of the cleaning shaft 1005, the shaft of the cleaning shaft 1005 is fixedly connected to the cleaning motor 1008, the surface of the side plate 1003 and the output end of the cylinder 1007 are detachably installed, and the cylinder 1007 is fixedly installed on the side of the guide rail shell 801. The expansion of the cylinder 1007 can push the wire brush 1006 close to the broach 804, and then the cleaning motor 1008 drives the wire brush 1006 to clean the surface of the broach 804.

[0055] See also Figure 15-18 The turbine disk fixing assembly 600 includes a top shell 601 and a bottom shell 602. The bottom shell 602 is installed inside the protective shell 500. The top shell 601 and the bottom shell 602 are telescopically connected by two symmetrically arranged pneumatic rods A603. The two pneumatic rods A603 are connected by a connecting rod. Both sides of the top shell 601 and the bottom shell 602 are rotatably connected to drive rollers 604. The drive rollers 604 extend to the outside of the top shell 601 and the bottom shell 602 respectively, and the turbine disk is placed between the four drive rollers 604. The shaft end of the drive roller 604 is fixedly connected to the output end of the drive motor 605. The drive motor 605 drives the drive roller 604 to rotate, and the drive roller 604 drives the turbine disk to rotate slowly, which is convenient for the cutting of the broach 804.

[0056] See also Figure 15-18A pneumatic rod B606 is fixedly inserted inside the top shell 601 and the bottom shell 602 and located on the inner side of the driving roller 604. The driving motor 605 is respectively installed on the outer surface of the top shell 601 and the bottom shell 602. The output end of the pneumatic rod B606 passes through and extends to the outside. A displacement splint 607 is fixedly installed on the output end of the pneumatic rod B606. The displacement splint 607 and the driving motor 605 are located on the same side. A fixed splint 608 is fixedly installed on the surface of the top shell 601 and the bottom shell 602 and located between the two pneumatic rods A603. A ball 609 is movably installed between the opposite surfaces of the displacement splint 607 and the fixed splint 608. The pneumatic rod B606 can be used to control the displacement and contraction of the displacement splint 607, and the displacement splint 607 will clamp the turbine disk. At the same time, the setting of the ball 609 will not affect the rotation of the turbine disk.

[0057] Working principle: When in use, the displacement drive motor 708 drives the screw rod 704 to rotate, and the screw rod 704 drives the two screw rod sleeves 705 to move together synchronously, and the rack assembly 800, the drive assembly 900 and the cleaning assembly 1000 will slide and close on the slide rod 702 through the sliding sleeve 703 until the end of the side of the broach 804 without teeth is attached to the outer side of the turbine disk, and then the main transmission motor 903 drives the driving bevel gear 902 to rotate, and the driving bevel gear 902 drives the rack housing 802, the slide bar 803 and the broach 804 to slide in the guide rail housing 801, and the side of the broach 804 contacts the outside of the turbine disk to achieve broaching, thereby facilitating the purpose of cutting the outer surface of the turbine disk.

[0058] The side plate 1003 is pushed to slide by the expansion of the cylinder 1007, the slide plate 1002 slides in the slide seat 1001, and the semicircular shell 1004 and the cleaning shaft 1005 move closer to the rack assembly 800 until the wire brush 1006 sticks to the toothed side of the broach 804, and then the cleaning motor 1008 is driven to rotate with the cleaning shaft 1005 and the wire brush 1006. The wire brush 1006 can clean up the residual iron filings on the surface of the broach 804, thereby achieving the purpose of cleaning the debris on the surface of the broach 804.

[0059] By removing the locking bolts 808 , the limiting sliders 807 can be removed from both ends of the rack housing 802 , and then the slide bar 803 is pushed to slide out of the rack housing 802 , thereby achieving the purpose of replacing and installing the broach 804 .

[0060] A lubricating oil shell 904 is mounted on the outer side of the driving helical gear 902, and the lubricating oil can be pumped into the interior of the lubricating oil shell 904 using the oil filling nozzle on the oil shell cover 905. The spring 907 will push the extrusion plate 906 upward, pushing the lubricating oil upward to contact the rotating driving helical gear 902. The driving helical gear 902 is meshed with the tooth grooves on the side of the rack housing 802, thereby reducing the wear between the transmission.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The main transmission device of large turbine disc mortise and tenon broaching machine is characterized by: The invention comprises a casing (100), a cover (200) is hingedly connected to the top of the casing (100), a notch is provided on the surface of the cover (200), strip-shaped openings (300) are provided on both sides of the casing (100), a shroud (400) is fixedly installed on the inner bottom wall of the casing (100), a protective shell (500) is fixedly installed on the inner side of the shroud (400), and a turbine disk fixing assembly (600) is arranged inside the protective shell (500) for The invention relates to a method for clamping a turbine disk; a displacement assembly (700) is provided on the inner bottom wall of the casing (100); a rack assembly (800) is slidably mounted above the displacement assembly (700); a driving assembly (900) is provided on the side of the rack assembly (800) for driving and displacing the rack assembly (800); and a cleaning assembly (1000) is provided on the outer side of the rack assembly (800) for cleaning the tooth gap of the rack assembly (800).

2. The main transmission device of the large turbine disc tongue and groove broaching machine according to claim 1 is characterized in that: The turbine disk fixing assembly (600) comprises a top shell (601) and a bottom shell (602), wherein the top shell (601) and the bottom shell (602) are telescopically connected via two symmetrically arranged pneumatic rods A (603), and both sides of the interior of the top shell (601) and the bottom shell (602) are rotatably connected to a driving roller (604), and the shaft end of the driving roller (604) is fixedly connected to the output end of a driving motor (605). A pneumatic rod B (606) is fixedly inserted inside (602) and located on the inner side of the driving roller (604), and a displacement clamp (607) is fixedly installed on the output end of the pneumatic rod B (606). A fixed clamp (608) is fixedly installed on the surface of the top shell (601) and the bottom shell (602) and located between the two pneumatic rods A (603), and a ball (609) is movably installed between the opposite surfaces of the displacement clamp (607) and the fixed clamp (608).

3. The main transmission device of the large turbine disc tongue and groove broaching machine according to claim 2 is characterized in that: The bottom shell (602) is installed inside the protective shell (500), the two pneumatic rods A (603) are connected by a connecting rod, the driving rollers (604) extend to the outside of the top shell (601) and the bottom shell (602) respectively, and the turbine disk is placed between the four driving rollers (604), the top of the protective shell (500) is provided with an opening corresponding to the turbine disk, the output end of the pneumatic rod B (606) passes through and extends to the outside, the displacement clamp (607) and the driving motor (605) are located on the same side, and the driving motor (605) is respectively installed on the outer surface of the top shell (601) and the bottom shell (602).

4. The main transmission device of the large turbine disc tongue and groove broaching machine according to claim 1 is characterized in that: The displacement assembly (700) comprises three pairs of support seats (701) arranged at equal intervals and mounted on the inner bottom wall of the housing (100); a slide bar (702) is inserted between the left and right pairs of support seats (701); a slide sleeve (703) is sleeved on the outer side of the slide bar (702); a screw rod (704) is inserted between the middle pair of support seats (701); a limit ring is fixedly mounted on the middle ends of the slide bar (702) and the screw rod (704); and a screw rod sleeve is threadedly connected to the outer side of the screw rod (704). (705), the outer surface of the screw rod (704) is provided with two sections of thread grooves with opposite threads, a transmission gear (706) is fixedly installed on the outer side of the screw rod (704) and at one end close to the support seat (701), a driving gear (707) is meshed with the side of the transmission gear (706), the axis of the driving gear (707) is fixedly connected to the output end of the displacement drive motor (708), and the bottom of the displacement drive motor (708) is fixedly connected to the inner wall of the housing (100) through a connecting plate.

5. The main transmission device of the large turbine disc tongue and groove broaching machine according to claim 4 is characterized in that: The rack assembly (800) includes a guide rail housing (801), both ends of which are inserted into the interior of the strip-shaped opening (300), the bottom of the guide rail housing (801) is fixedly connected to the sliding sleeve (703) and the screw sleeve (705) respectively, the interior of the guide rail housing (801) is slidably mounted with a rack housing (802), the interior of the rack housing (802) is slidably mounted with a sliding bar (803), a broach (804) is fixedly mounted on the side of the sliding bar (803), a spring (805) is embedded on the side of the sliding bar (803) close to the rack housing (802), the other end of the spring (805) is fixedly mounted with a chuck (806), both ends of the rack housing (802) are slidably mounted with limiting sliders (807) corresponding to the sliding bar (803), and the side of the rack housing (802) is threadedly connected with a locking bolt (808).

6. The main transmission device of the large turbine disc tongue and groove broaching machine according to claim 5 is characterized in that: The internal groove of the rack housing (802) and the cross-section of the sliding bar (803) are in the shape of an I-beam. The upper and lower surfaces of the broach (804) are provided with limiting grooves. The inner wall of the guide rail housing (801) is fixedly provided with a limiting strip corresponding to the limiting groove. The inner wall of the rack housing (802) is provided with a clamping groove corresponding to the clamping head (806). One end of the locking bolt (808) extends to the side threaded hole of the limiting slider (807), and an extension rod is fixedly provided on the surface of the limiting slider (807).

7. The main transmission device of the large turbine disc tongue and groove broaching machine according to claim 5 is characterized by: The driving assembly (900) includes a bracket (901) mounted on the side of the rack housing (802); a driving bevel gear (902) meshing with the side of the rack housing (802) is rotatably mounted inside the bracket (901); the axis of the driving bevel gear (902) is aligned with the main transmission motor (903); a lubricating oil shell (904) is sleeved on the outer side of the driving bevel gear (902); an oil shell cover (905) is clamped on the top of the lubricating oil shell (904); an extrusion plate (906) is arranged inside the lubricating oil shell (904) and below the driving bevel gear (902); a spring 2 (907) is fixedly mounted on the bottom of the extrusion plate (906).

8. The main transmission device of the large turbine disc tongue and groove broaching machine according to claim 7 is characterized in that: A docking port corresponding to the driving bevel gear (902) is provided on the side of the rack housing (802), one side of the driving bevel gear (902) extends into the interior of the docking port, the top of the main drive motor (903) is fixedly mounted on the bracket (901), the lubricating oil shell (904) is semicircular, and an oiling nozzle is fixedly mounted on the top of the oil shell cover (905).

9. The main transmission device of the large turbine disc tongue and groove broaching machine according to claim 7 is characterized by: The cleaning assembly (1000) comprises a sliding seat (1001) fixedly mounted on the outside of the guide rail shell (801), a sliding plate (1002) slidably mounted inside the sliding seat (1001), a side plate (1003) fixedly mounted on one side of the sliding plate (1002), and a semicircular shell (1004) fixedly mounted on the other side of the sliding plate (1002).

10. The main transmission device of the large turbine disc tongue and groove broaching machine according to claim 9, characterized in that: The interior of the semicircular shell (1004) is rotatably connected to a cleaning shaft (1005), the outer side of the cleaning shaft (1005) is fixedly mounted with a wire brush (1006), the shaft of the cleaning shaft (1005) is fixedly connected to a cleaning motor (1008), the surface of the side plate (1003) and the output end of the cylinder (1007) are detachably mounted, and the cylinder (1007) is fixedly mounted on the side of the guide rail shell (801).

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