High-precision cutting machine for turbine casting sprue

Abstract

The utility model discloses a turbine casting inner gate high accuracy cutting machine belongs to mechanical processing equipment technical field. The cutting machine includes frame, workstation, cutting assembly and clamping assembly. The U type groove of the positioning plate of clamping assembly is matched with turbine boss and realizes radial positioning, and the arc surface that the profiling structure sticks together turbine blade forms provides axial support, thereby realizes the steady clamping to turbine, and combines the cross slide fine adjustment, and ensures the precision of workpiece cutting. The cutting assembly adopts the elastic suspension structure, and the adjusting bearing is installed in the motor base through the adjusting plate, and cooperates the reset spring and absorbs the vibration, and the grinding wheel main shaft assembly passes through the precision bearing and the sealed structure and guarantees the main shaft stability. The intelligent compensation system monitors the grinding wheel piece position in real time through the laser displacement sensor, and links cross slide dynamic compensation cutting depth.

Description

Technical Field

[0001] This utility model relates to the field of machining equipment technology, specifically to a high-precision cutting machine for the inner gate of a turbine casting. Background Technology

[0002] Turbine castings have complex structures, with thin-walled blades and a dense spatial distribution, requiring extremely high cutting precision and stability during the removal of the ingate. While existing casting cutting equipment (such as the casting cutting machine with application number 201820980740.X) can clamp turbine castings, it struggles to meet the high precision requirements. The remaining ingate portion of the cut turbine casting usually still requires subsequent grinding. Specific drawbacks are as follows: 1. The fixture mainly serves a positioning function, but it is difficult to firmly hold the irregular contour of the turbine casting. Cutting vibration can easily cause workpiece displacement and affect the flatness of the cut. 2. Simply cutting the turbine from the inner gate is difficult to control precisely during the cutting process, requiring secondary grinding; 3. After prolonged cutting, the grinding wheel becomes thinner, and when the cutting reference surface changes, there is a lack of a real-time compensation mechanism. Utility Model Content

[0003] The purpose of this invention is to overcome the defects in the existing technology and provide a high-precision cutting machine for the inner gate of turbine castings that has stable clamping, accurate positioning, and good dynamic stability.

[0004] To achieve the above objectives, the technical solution of this utility model is to design a high-precision cutting machine for the inner gate of a turbine casting, including a frame, a worktable, a cutting assembly, and a clamping assembly. The worktable is mounted on the frame, and both the cutting assembly and the clamping assembly are mounted on the worktable. The cutting assembly includes a motor base mounted on the worktable. Adjusting bearing seats are installed at both ends of the upper side of the motor base, and adjusting bearings are installed inside the adjusting bearing seats. The adjusting bearings are fitted onto both ends of the adjusting plate shaft, and an adjusting plate is mounted on the adjusting plate shaft. A motor, a grinding wheel spindle assembly, and a pressing handle are mounted on the adjusting plate. The output shaft of the motor and the input end of the grinding wheel spindle assembly are connected by a pulley and a belt drive. A grinding wheel is installed at the output end of the grinding wheel spindle assembly. A limit rod and a return spring are respectively installed between the motor base and the adjusting plate. The clamping assembly is located below the grinding wheel spindle assembly, and the turbine casting to be cut is placed on the clamping assembly. The preferred grinding wheel is made of high-precision, ultra-thin, and ultra-hard material. Its advantages, such as high precision, small kerf, and good surface finish, can further improve cutting accuracy and quality.

[0005] Specifically, the clamping assembly includes a clamping bracket and a positioning bracket mounted on the worktable. A clamping cylinder is mounted on the clamping bracket, and one end of the clamping cylinder is connected to a push plate via a push rod. A positioning plate is mounted on the positioning bracket, and the positioning plate has a U-shaped groove that mates with a turbine boss on the turbine's side away from the turbine backplate. The U-shaped groove is concentric with the push rod. The side of the positioning plate near the clamping cylinder has a contoured structure that conforms to the arc surface formed by all turbine blades on the turbine casting away from the turbine backplate. The U-shaped groove precisely mates with the turbine boss on the turbine casting away from the turbine backplate, achieving radial positioning. The contoured structure closely matches the arc surface formed by all turbine blades on the turbine casting away from the turbine backplate, providing a large-area, highly conforming axial support surface, greatly suppressing blade deformation and displacement caused by cutting vibration, and further improving cutting accuracy. Different positioning plates are required for different turbine models. The tolerances of components such as the positioning bracket and positioning plate must meet requirements to ensure cutting accuracy.

[0006] Furthermore, the clamping assembly also includes a cross slide, which is mounted on the worktable, and the clamping bracket and positioning bracket are mounted above the cross slide. For different models of turbines, the cross slide can quickly and accurately achieve concentricity between the U-shaped groove and the push rod, thereby ensuring cutting accuracy. The preferred adjustment method for the cross slide is both manual adjustment and controllable electric drive adjustment. The cross slide is a precision motion platform composed of two sets of linear slides vertically combined along the X and Y axes. Its appearance is a cross shape due to the coincidence of the two axis centers. Its core transmission method includes synchronous belt drive and ball screw drive, enabling fixed-point motion, linear displacement, and curve interpolation motion within a planar coordinate system.

[0007] Furthermore, a sliding groove is provided above the cross slide table, and a slider matching the sliding groove is fixedly installed at the bottom of the clamping bracket and the positioning bracket. The clamping bracket and the positioning bracket are fixed to the top of the cross slide table by locking bolts. The clamping bracket and the positioning bracket can slide on the cross slide table to accommodate turbines of different sizes. For turbines of different sizes with large size differences, it is necessary to replace the clamping bracket and the positioning bracket, as well as the clamping cylinder and the positioning plate above, to ensure that the U-shaped groove is concentric with the push rod.

[0008] Specifically, the grinding wheel spindle assembly includes a grinding wheel spindle housing, a bushing cover, and a grinding wheel spindle. The grinding wheel spindle housing is mounted on an adjusting plate and has an oil injection nozzle. The bushing cover is sealed at both ends of the grinding wheel spindle housing using O-rings. The grinding wheel spindle is supported within the grinding wheel spindle housing by grinding wheel bearings. A skeleton oil seal is fitted onto the grinding wheel spindle, and the skeleton oil seal is fitted outside the bushing cover. A grinding wheel is mounted on one end of the grinding wheel spindle, and a pulley is mounted on the other end. Preferably, the grinding wheel is fixed to the grinding wheel spindle using a cutting disc clamping plate and a nut. This structure of the grinding wheel spindle assembly, instead of using a single shaft to drive the grinding wheel, reduces the vibration of the grinding wheel spindle, improves the stability of the grinding wheel during cutting, and thus improves the accuracy of cutting.

[0009] Furthermore, the worktable has a discharge port located below the turbine cutting position. The discharge port connects to a collection bin, which is installed below the worktable and contains shock-absorbing pads. The discharge port and collection bin improve cutting efficiency, and the shock-absorbing pads prevent damage to the turbine when it falls.

[0010] Furthermore, a protective cover is provided above the workbench, with an operating opening on the side of the protective cover near the turbine cutting position. The cutting assembly and clamping assembly are both located inside the protective cover. The protective cover further enhances safety protection and improves the working environment for workers.

[0011] Furthermore, a dust collection port is provided on the workbench, and a tabletop dust collection hood is provided above the dust collection port. The tabletop dust collection hood is located on the side of the turbine cutting position away from the operating port, and a dust collection bin is provided below the dust collection port. The dust collection port and dust collection bin are provided to improve the working environment, reduce the impact of dust on the equipment and workers, and reduce dust adsorption on the equipment, thereby reducing the reduction of cutting accuracy.

[0012] Furthermore, a laser displacement sensor is installed on the positioning bracket. The laser emission line of the laser displacement sensor is parallel to the axis of the grinding wheel, and the laser displacement sensor is linked with the cross slide. During the pressing and lifting of the grinding wheel, the laser displacement sensor can measure and monitor the distance between the cutting surface of the grinding wheel near the clamping mechanism and the laser displacement sensor, and feed the signal back to the control system. After noise reduction processing, the control system drives the cross slide to perform fine-tuning compensation, achieving dynamic high-precision control of the cutting depth.

[0013] Preferably, a switch device is provided at the pressing handle. The switch device, motor, clamping cylinder, cross slide, laser displacement sensor and other equipment are electrically connected to the control system and are linked together.

[0014] The advantages and beneficial effects of this utility model are as follows: 1. The positioning plate uses a dual positioning system of U-shaped groove and contoured structural surface, combined with cross slide table fine adjustment, to improve the positioning accuracy of turbine castings and ensure that the cutting surface is strictly consistent with the design datum.

[0015] 2. The elastic suspension of the cutting assembly effectively absorbs high-frequency vibration; the precision bearing support and sealing design of the grinding wheel spindle assembly reduces spindle runout; the large-area contour support greatly suppresses workpiece vibration and deformation. The above measures work together to ensure that the entire equipment has high cutting accuracy.

[0016] 3. The laser displacement sensor is linked with the cross slide to compensate for tool wear or clamping errors in real time, ensuring consistent cutting depth in batches.

[0017] 4. Specifically designed for turbine castings, it features quick and secure clamping, high cutting precision, and high-quality residual surface of the ingate after cutting. It typically requires no secondary grinding or only minor grinding to meet the requirements. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the cutting machine of this utility model; Figure 2 This is a schematic diagram of the cutting component structure of the cutting machine of this utility model; Figure 3 This is a schematic diagram of the cutting machine grinding wheel spindle assembly structure of this utility model; Figure 4 This is a schematic diagram of the structure of the cutting machine clamping assembly of this utility model; Figure 5 This is a schematic diagram of the positioning plate structure of this utility model; Figure 6 This is an exploded view of the positioning plate of this utility model.

[0019] In the diagram: 1. Frame; 2. Worktable; 3. Cutting assembly; 301. Motor base; 302. Adjusting bearing seat; 303. Press-down handle; 304. Adjusting bearing; 305. Adjusting plate shaft; 306. Adjusting plate; 307. Motor; 38. Grinding wheel spindle assembly; 381. Grinding wheel spindle housing; 382. Bushing cover; 383. Grinding wheel spindle; 384. Oil nozzle; 385. O-ring seal; 386. Grinding wheel bearing; 387. Oil seal; 309. Grinding wheel; 310. Limit rod; 311. Return spring; 312. Pulley; 313. Belt; 4. Clamping assembly; 401. Clamping bracket; 402. Positioning bracket; 403. Clamping cylinder; 404. Push rod; 405. Push plate; 406. Positioning plate; 407. U-shaped groove; 408. Contouring structure; 409. Cross slide; 410. Slide groove; 411. Slider; 412. Locking bolt; 5. Turbine; 501. Turbine back plate; 502. Turbine boss; 503. Turbine blade; 61. Discharge port; 62. Collection bin; 63. Shock-absorbing pad; 7. Protective cover; 81. Ash collection port; 82. Tabletop ash collection cover; 83. Ash collection bin; 9. Laser displacement sensor. Detailed Implementation

[0020] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0021] according to Figures 1-4 As shown, this utility model is a high-precision cutting machine for the inner gate of a turbine casting, including a frame 1, a worktable 2, a cutting assembly 3, and a clamping assembly 4. The worktable 2 is mounted on the frame 1, and both the cutting assembly 3 and the clamping assembly 4 are mounted on the worktable 2. The cutting assembly 3 includes a motor base 301 mounted on the worktable 2. Adjusting bearing seats 302 are mounted on both ends of the upper side of the motor base 301, and adjusting bearings 304 are installed inside the adjusting bearing seats 302. The adjusting bearings 304 are fitted onto both ends of an adjusting plate shaft 305. An adjustment plate 306 is installed on the upper part of the machine. A motor 307, a grinding wheel spindle assembly 38, and a pressing handle 303 are installed on the adjustment plate 306. The output shaft of the motor 307 and the input end of the grinding wheel spindle assembly 38 are driven and connected through a pulley 312 and a belt 313. A grinding wheel 309 is installed on the output end of the grinding wheel spindle assembly 38. A limit rod 310 and a return spring 311 are respectively installed between the motor base 301 and the adjustment plate 306. The clamping assembly 4 is located below the grinding wheel spindle assembly 38, and the turbine casting 5 to be cut is placed on the clamping assembly 4.

[0022] according to Figures 4-6As shown, in any embodiment, the clamping assembly 4 includes a clamping bracket 401 and a positioning bracket 402 mounted on the worktable 2. A clamping cylinder 403 is mounted on the clamping bracket 401. One end of the clamping cylinder 403 is connected to a push plate 405 via a push rod 404. A positioning plate 406 is mounted on the positioning bracket 402. A U-shaped groove 407 is provided on the positioning plate 406. The U-shaped groove 407 cooperates with the turbine boss 502 on the turbine 5 away from the turbine back plate 501. The U-shaped groove 407 is concentrically arranged with the push rod 404. The side of the positioning plate 406 near the clamping cylinder 403 is a contour structure 408. The contour structure 408 is adapted to the arc surface formed by all the turbine blades 503 on the turbine casting to be cut away from the turbine back plate 501.

[0023] according to Figure 3 As shown, in any embodiment, the grinding wheel spindle assembly 38 includes a grinding wheel spindle housing 381, a bushing cover 382, ​​and a grinding wheel spindle 383. The grinding wheel spindle housing 381 is mounted on an adjusting plate 306. An oil injection nozzle 384 is provided on the grinding wheel spindle housing 381. The bushing cover 382 is sealed at both ends of the grinding wheel spindle housing 381 by O-ring seals 385. The grinding wheel spindle 383 is supported inside the grinding wheel spindle housing 381 by a grinding wheel bearing 386. A skeleton oil seal 387 is fitted on the grinding wheel spindle 383. The skeleton oil seal 387 is fitted on the outside of the bushing cover 382. A grinding wheel 309 is mounted on one end of the grinding wheel spindle 383, and a pulley 312 is fitted on the other end.

[0024] A switch is provided at the pressing handle 303.

[0025] The working principle is as follows: Select a suitable positioning plate 406 according to the turbine 5 model to be cut, and install the positioning plate 406 on the positioning bracket 402. Determine the cutting reference surface according to the cutting distance of the turbine 5 model, and install the positioning bracket 402 in a suitable position on the worktable 2. Ensure that the cut height of the inner gate on the turbine casting 5 after cutting meets the design requirements (within the tolerance range). Press the grinding wheel 309 down repeatedly to the preset cutting position to test whether the cutting depth and the cutting surface meet the set requirements. Then, install the clamping cylinder 403 on the clamping bracket 401, and ensure that the U-shaped groove 407 of the positioning plate 406 and the push rod 404 of the clamping cylinder 403 are concentrically set. Adjust the clamping bracket 401 to a suitable position and then fix it on the worktable 2. During operation, the worker holds the turbine casting to be cut with one hand and places the turbine boss 502 at the inlet into the U-shaped groove 407 of the positioning plate 406. The worker also ensures that the contouring structure 408 fits against the arc surface formed by all the turbine blades 503 on the turbine casting away from the turbine back plate 501. With the other hand, the worker pushes the pressing handle 303. During the pressing process, the switch at the pressing handle 303 is activated, and the motor 307 starts. At the same time, the clamping cylinder 403 starts and pushes the push plate 405 to hold the turbine 5. At this time, due to the cooperation of the contouring structure 408 and the U-shaped groove 407, as well as the support provided by the worker's hand, the turbine casting to be cut has good clamping stability, and the cutting position is fixed each time, thus meeting the requirements of high-precision cutting. The worker continuously pushes the downward handle 303, and the grinding wheel 309 rotates and slowly feeds downward under the drive of the motor 307, starting to cut the inner gate of the turbine casting 5; after the cutting is completed, the worker releases the downward handle 303, the motor 307 is turned off, the entire cutting assembly 3 bounces upward and resets under the elastic force of the return spring 311, and stays in the initial position under the restriction of the limit rod 310. At the same time, the clamping cylinder 403 retracts, the push plate 405 moves away from the turbine 5, the turbine 5 falls into the collection chamber 62 below, the entire cutting process is completed, the worker changes the turbine casting to be cut and continues to cut the next turbine 5.

[0026] according to Figure 2 and 4 As shown, in any embodiment, the clamping assembly 4 further includes a cross slide 409, which is mounted on the worktable 2, and the clamping bracket 401 and the positioning bracket 402 are mounted above the cross slide 409. The difference between this embodiment and other embodiments is that the cross slide 409 can more accurately and quickly fix the positions of the clamping bracket 401 and the positioning bracket 402.

[0027] according to Figure 2 and 4As shown, in any embodiment, a groove 410 is provided above the cross slide 409, and a slider 411 matching the groove 410 is fixedly provided at the bottom of the clamping bracket 401 and the positioning bracket 402. The clamping bracket 401 and the positioning bracket 402 are fixed above the cross slide 409 by locking bolts 412. The difference between this embodiment and other embodiments is that when cutting turbines 5 of different models, for turbines with large size differences, it is necessary to change or adjust the position of the clamping bracket 401 and the positioning bracket 402 so that the U-shaped groove 407 is concentric with the push rod 404, and the clamping cylinder 403 can also provide a suitable clamping force. The groove 410 and the slider 411 cooperate with each other to accurately control the distance between the clamping bracket 401 and the positioning bracket 402. Compared with bolt fixing, it can adapt to more models.

[0028] according to Figure 4 As shown, in any embodiment, the workbench 2 has a discharge port 61 located below the turbine 5 cutting position. The discharge port 61 connects to a collection chamber 62, which is installed below the workbench 2. A shock-absorbing pad 63 is installed inside the collection chamber 62. The difference between this embodiment and other embodiments is that the cut turbine 5 falls directly into the collection chamber 62 with the shock-absorbing pad 63 through the discharge port 61, thereby improving cutting efficiency. The shock-absorbing pad 63 prevents the turbine 5 from being damaged by impacts when it falls.

[0029] according to Figure 1 As shown, in any embodiment, a protective cover 7 is provided above the workbench 2. The protective cover 7 has an operating opening on the side near the cutting position of the turbine 5, and the cutting assembly 3 and the clamping assembly 4 are both located inside the protective cover 7. The difference between this embodiment and other embodiments is that the protective cover 7 is used to improve safety protection and improve the working environment for workers.

[0030] according to Figure 2 As shown, in any embodiment, the workbench 2 is provided with a dust collection port 81, and a tabletop dust collection cover 82 is provided above the dust collection port 81. The tabletop dust collection cover 82 is located on the side of the turbine 5 cutting position away from the operating port, and a dust collection bin 83 is provided below the dust collection port 81. The difference between this embodiment and other embodiments is that, during operation, during the cutting process, the dust and impurities cut off enter the dust collection bin 83 through the dust collection port 81, and the tabletop dust collection cover 82 can prevent dust and impurities from adsorbing onto the surface of other equipment.

[0031] according to Figure 4As shown, in any embodiment, a laser displacement sensor 9 is provided on the positioning bracket 402. The laser emission line of the laser displacement sensor 9 is parallel to the axis of the grinding wheel 309, and the laser displacement sensor 9 is linked with the cross slide 409. The difference between this embodiment and other embodiments is that the laser displacement sensor 9 can measure and monitor the distance between the cutting surface of the grinding wheel 309 near the clamping mechanism and the laser displacement sensor 9 during the pressing and lifting of the grinding wheel 309, and feed the signal back to the control system. After noise reduction processing, the control system drives the cross slide 409 to perform fine-tuning compensation, thereby achieving dynamic high-precision control of the cutting depth. During operation, the laser displacement sensor 9 activates to measure the distance to the front in real time and transmits the measurement data to the control system. When the worker pushes down the handle 303, the grinding wheel 309 passes the laser emission line of the laser displacement sensor 9, thereby calculating the distance between the two and inferring the distance between the cutting surface and the positioning plate 406. Because the laser displacement sensor 9 continuously emits laser light and receives reflected signals, it measures the distance from its laser emission line to the object in front (which may be the side of the grinding wheel, the workpiece being cut, or the air) in real time and transmits it back to the control system. The control system performs real-time filtering on the received distance measurement data and extracts the effective signal (mainly reflecting the position change of the side of the grinding wheel 309). The effective measurement value is compared with the preset reference value to calculate the grinding wheel wear or position deviation. Then, the control system generates a compensation command, driving the cross slide 409 to move the clamping assembly 4 and the workpiece 5 to perform precise micro-displacement compensation along the direction perpendicular to the cutting feed (i.e., the thickness direction of the grinding wheel) to dynamically maintain the set cutting depth.

[0032] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A high-precision cutting machine for the inner gate of a turbine casting, characterized in that, The system includes a frame (1), a worktable (2), a cutting assembly (3), and a clamping assembly (4). The worktable (2) is mounted on the frame (1). Both the cutting assembly (3) and the clamping assembly (4) are mounted on the worktable (2). The cutting assembly (3) includes a motor base (301) mounted on the worktable (2). Adjusting bearing seats (302) are mounted on both ends of the upper side of the motor base (301). Adjusting bearings (304) are installed inside the adjusting bearing seats (302). The adjusting bearings (304) are fitted onto both ends of an adjusting plate shaft (305). An adjusting plate (306) is mounted on the adjusting plate shaft (305). The adjustment plate (306) is equipped with a motor (307), a grinding wheel spindle assembly (38), and a pressing handle (303). The output shaft of the motor (307) and the input end of the grinding wheel spindle assembly (38) are connected by a pulley (312) and a belt (313). The output end of the grinding wheel spindle assembly (38) is equipped with a grinding wheel (309). A limit rod (310) and a return spring (311) are respectively installed between the motor base (301) and the adjustment plate (306). The clamping assembly (4) is located below the grinding wheel spindle assembly (38), and the turbine (5) casting to be cut is placed on the clamping assembly (4).

2. The high-precision cutting machine for the inner gate of a turbine casting according to claim 1, characterized in that, The clamping assembly (4) includes a clamping bracket (401) and a positioning bracket (402) mounted on the workbench (2). A clamping cylinder (403) is mounted on the clamping bracket (401). One end of the clamping cylinder (403) is connected to a push plate (405) via a push rod (404). A positioning plate (406) is mounted on the positioning bracket (402). A U-shaped groove (407) is formed on the positioning plate (406). 407) is matched with the turbine boss (502) on the side of the turbine (5) away from the turbine back plate (501). The U-shaped groove (407) is concentrically set with the push rod (404). The positioning plate (406) is a contour structure (408) on the side near the clamping cylinder (403). The contour structure (408) is adapted to the arc surface formed by all the turbine blades (503) on the turbine (5) casting to be cut away from the side of the turbine back plate (501).

3. A high-precision cutting machine for the inner gate of a turbine casting according to claim 2, characterized in that, The clamping assembly (4) also includes a cross slide (409), which is mounted on the worktable (2), and the clamping bracket (401) and the positioning bracket (402) are mounted above the cross slide (409).

4. A high-precision cutting machine for the inner gate of a turbine casting according to claim 3, characterized in that, A slide groove (410) is provided above the cross slide (409). The bottom of the clamping bracket (401) and the positioning bracket (402) are fixedly provided with sliders (411) that match the slide groove (410). The clamping bracket (401) and the positioning bracket (402) are fixed above the cross slide (409) by locking bolts (412).

5. A high-precision cutting machine for the inner gate of a turbine casting according to claim 1, characterized in that, The grinding wheel spindle assembly (38) includes a grinding wheel spindle housing (381), a bushing cover (382), and a grinding wheel spindle (383). The grinding wheel spindle housing (381) is mounted on an adjusting plate (306). An oil injection nozzle (384) is provided on the grinding wheel spindle housing (381). The bushing cover (382) is sealed at both ends of the grinding wheel spindle housing (381) by O-ring seals (385). The grinding wheel spindle (383) is supported inside the grinding wheel spindle housing (381) by a grinding wheel bearing (386). A skeleton oil seal (387) is fitted on the grinding wheel spindle (383). The skeleton oil seal (387) is fitted on the outside of the bushing cover (382). A grinding wheel (309) is installed at one end of the grinding wheel spindle (383), and a pulley (312) is fitted at the other end.

6. A high-precision cutting machine for the inner gate of a turbine casting according to claim 1, characterized in that, The workbench (2) is located below the cutting position of the turbine (5) and has a discharge port (61). The discharge port (61) is connected to the collection chamber (62). The collection chamber (62) is installed below the workbench (2) and is equipped with a shock-absorbing pad (63).

7. A high-precision cutting machine for the inner gate of a turbine casting according to claim 1, characterized in that, A protective cover (7) is provided above the workbench (2). The protective cover (7) has an operating port on the side near the turbine (5) cutting position. The cutting component (3) and the clamping component (4) are both located inside the protective cover (7).

8. A high-precision cutting machine for the inner gate of a turbine casting according to claim 1, characterized in that, The workbench (2) is provided with a dust collection port (81), and a table dust collection cover (82) is provided above the dust collection port (81). The table dust collection cover (82) is located on the side of the turbine (5) cutting position away from the operating port. A dust collection bin (83) is provided below the dust collection port (81).

9. A high-precision cutting machine for the inner gate of a turbine casting according to claim 3, characterized in that, A laser displacement sensor (9) is provided on the positioning bracket (402). The laser emission line of the laser displacement sensor (9) is parallel to the axis of the grinding wheel (309). The laser displacement sensor (9) is linked with the cross slide (409).

10. A high-precision cutting machine for the inner gate of a turbine casting according to claim 1, characterized in that, A switch is provided at the pressing handle (303).

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