An automatically positioned turbine blade machining device

Abstract

The application relates to the technical field of intelligent manufacturing equipment industry, and discloses an automatic-positioning steam turbine blade machining device, which comprises a guide sliding base, two ends of the top of the guide sliding base are symmetrically provided with support plates, the support plates are provided in two groups, the inner sides of the two groups of support plates are respectively provided with a group of butt joint assemblies and a group of clamping assemblies, the clamping assemblies are in sliding fit with the guide sliding base, and the butt joint assemblies comprise hydraulic rods. The automatic-positioning steam turbine blade machining device is characterized in that the two side support plates are driven by driving screws to feed synchronously, the hydraulic rod inner support mechanism and the clamping disc embracing mechanism move synchronously, the blade inner hole self-centering support and the outer circle embracing clamping are completed at one time, the inner and outer clamping coaxialities are high, the annularly and uniformly distributed inner support protrusions and the arc-shaped clamping strips are uniformly stressed at multiple points, the blade is constrained from the inside and outside, the radial deviation in the machining process is prevented, the steam turbine blade profile profile degree and the blade root coaxiality machining precision are improved, and the batch machining size consistency is high.

Description

Technical Field

[0001] This invention relates to the field of intelligent manufacturing equipment technology, specifically to an automatic positioning steam turbine blade processing device. Background Technology

[0002] Steam turbine blades are precision irregular curved surface components and are the core power-generating parts of a steam turbine. Their machining accuracy and clamping stability directly determine the turbine's operating efficiency and service life. Current steam turbine blade machining tooling suffers from the following defects: traditional tooling often uses a single-sided external clamping structure, relying solely on a single point of force on the outer wall during clamping. The blade's inner bore lacks support and positioning, making it prone to radial displacement and slight deformation during milling and grinding. Blade profile and root dimensional tolerances are difficult to control, resulting in poor consistency in batch production.

[0003] The existing equipment has an internal support positioning mechanism and an external clamping mechanism that are operated independently in two steps. The internal support is tightened first and then the external clamping is locked. This step-by-step operation increases the clamping time. Furthermore, the internal and external clamping forces are not linked and matched, which can easily lead to excessive internal support causing deformation of the blade's inner hole, or loosening of the external clamping causing vibration of the blade, resulting in a high scrap rate.

[0004] Different specifications of blade roots and different outer diameter blades require the replacement of a complete set of tooling fixtures. The replacement process is cumbersome. The clamping surfaces of the fixtures are mostly hard metal that directly contacts the blade blank. Under cutting vibration, the blade surface is easily scratched, resulting in indentations and bumps. Subsequent grinding processes increase processing costs.

[0005] The clamping position of the fixture base is fixed, and the distance between the two sets of clamping mechanisms cannot be adjusted according to the blade length and processing steps. The lead screw guide sliding structure lacks synchronous guide limit, the centering deviation of the clamping plates on both sides is large, the concentricity is difficult to guarantee, and the processing coaxiality index does not meet the standard. Summary of the Invention

[0006] The purpose of this invention is to provide an automatic positioning turbine blade processing device to solve the problems mentioned in the background art, which are that traditional tooling often adopts a single-sided external clamping structure, which relies on a single point of force on the outer wall during clamping, and the blade inner hole is not supported for positioning. During the milling and grinding process, the blade is prone to radial displacement and slight deformation, and the blade surface profile and blade root size tolerance are difficult to control, resulting in poor consistency of batch processed products.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an automatic positioning turbine blade processing device, comprising: a guide slide, with support plates symmetrically installed at both ends of the top of the guide slide; two sets of support plates are provided, and a docking assembly and a clamping assembly are respectively assembled on the inner side of the two sets of support plates; the clamping assembly is slidably adapted to the guide slide; the operator locks and fixes the base of the guide slide to the worktable of the turbine blade CNC machining machine tool using four-corner flange bolts, ensuring that the central axis of the device is coaxial with the machining spindle of the machine tool. The synchronous motors of the drive screws on both sides are synchronously adjusted to ensure that the sliding displacement of the left and right support plates is completely synchronized.

[0008] The docking assembly includes a hydraulic rod, which is fixedly installed on the outside of the support plate. The output shaft of the hydraulic rod passes through the support plate and is connected to a mounting base. An inner support member is coaxially fixed to the end of the mounting base.

[0009] Furthermore, the clamping assembly includes an assembly plate fixed inside the support plate. Multiple sliding rods are parallel to each other on the surface of the assembly plate. Each sliding rod has a connecting frame and a clamping disc connected to its two ends. The clamping disc is coaxially sleeved on the outside of the inner support member. For blade specification adaptation and replacement, based on the outer diameter and inner bore size of the turbine blade to be processed, the original positioning clamping member in the clamping disc slot is disassembled, and a positioning clamping member with a matching curvature is selected. The snap-fit ​​block is then embedded into the slot to complete the arc-shaped clamping strip assembly. Simultaneously, an inner support member with a corresponding outer diameter is matched and locked and fixed to the end of the mounting base, completing the adaptation of the inner and outer clamping specifications.

[0010] Furthermore, a positioning ring is provided at the center of the clamping disc, and multiple sets of positioning clamps are evenly arranged circumferentially around the positioning ring. A groove is formed between the positioning clamps and the clamping disc. The actuation slide rod, paired with a drive cylinder, pulls the connecting frame, causing the clamping disc to slide axially along the slide rod, adjusting the axial distance between the clamping disc and the inner support to match the axial length of the current turbine blade. A return spring assists the slide rod in quickly returning to its original position, reserving a blade clamping position.

[0011] Furthermore, the slide rods are evenly arranged circumferentially along the assembly plate, and a return spring is fitted on the outer side of each slide rod. The connecting frame is connected to an external cylinder drive, which drives the slide rods to move the clamping plate back and forth axially to accommodate turbine blades of different lengths. The two side mechanisms synchronously center and move closer together, driving the lead screws to rotate synchronously in opposite directions. The hydraulic rods on the two side support plates feed synchronously towards each other along the slide rail. The left and right inner supports and the clamping plate synchronously move closer to both ends of the blade. The inner supports pass through the central positioning ring of the clamping plate and extend coaxially into the inner holes at both ends of the turbine blade.

[0012] Furthermore, the positioning clamp includes an arc-shaped locking strip, which is arranged along the arc of the positioning ring. Friction protection teeth are evenly arranged on the inner sidewall of the arc-shaped locking strip. A locking block is provided at the end of the arc-shaped locking strip, and the locking block is engaged in a slot for detachable assembly of the positioning clamp and the clamping plate.

[0013] Furthermore, the clamping discs on both sides move closer together synchronously with the support plate. The arc-shaped clamping strip encircles the outer wall of the blade, used for synchronous automatic positioning of the blade's inner support and outer clamping. The positioning clamps are detachably engaged with the slots via snap-fit ​​blocks, allowing for quick replacement of positioning clamps with different curvatures according to the turbine blade's outer diameter specifications. After the clamping mechanism releases the processing step, the hydraulic rod retracts synchronously, pulling the mounting base backward and causing the extrusion protrusion to retract radially, releasing the blade's inner hole support. The sliding rod and its matching cylinder pull the clamping discs back slightly, disengaging the arc-shaped clamping strip from the blade's outer wall and releasing the outer encircling clamping. The support plate opens, and the unloading drive screw rotates forward. The hydraulic rods on both support plates drive the clamping and docking components to slide along the slide rails to both ends, fully opening the two sets of clamping and docking components and releasing the processed turbine blade. The robotic arm picks up the finished blade and transports it to the unloading station. The tooling reset standby cylinder, hydraulic rod, and drive screw are all reset to their initial positions, waiting for the next batch of turbine blades to be loaded, and the automatic positioning and processing process is executed in a cycle.

[0014] Furthermore, the inner support includes a positioning shaft with multiple sets of extrusion protrusions evenly distributed around its outer circumference. Extrusion strips are fixed to the outer sides of the extrusion protrusions, and elastic pads cover the outer walls of the extrusion strips. Limiting blocks are provided at the ends of the extrusion protrusions. Simultaneously, the outer ring grips and positions the blade. While the inner support completes the centering of the inner hole, the hydraulic rod on the support plate continuously feeds in small increments. The clamping discs on both sides adhere to the outer walls of both ends of the blade, and multiple sets of arc-shaped clamping strips encircle the outer circumference of the blade on the inner side of the positioning ring. Friction protection teeth tightly adhere to the outer wall of the blade, increasing the clamping friction. Together with the internal support, this forms a bidirectional synchronous clamping constraint between the inner support and the outer grip, completing the fully automatic coaxial positioning of the turbine blade.

[0015] Furthermore, the elastic pad is a polyurethane buffer pad, and the friction protection teeth are arc-shaped flexible toothed structures. The elastic pad and friction protection teeth flexibly fit into the inner hole and outer wall of the blade, respectively. During processing, the elastic pad of the inner support and the friction protection teeth of the clamping plate flexibly buffer cutting vibration, absorb processing vibration force, and avoid slight blade vibration. The drive screws and slide rails on both sides continuously lock the position of the support plate, and the slide bar return spring locks the clamping plate, ensuring that the blade concentricity and clamping stiffness remain unchanged throughout the processing. Multiple sets of ring-arranged positioning clamps and inner support are evenly stressed at multiple points, resulting in balanced blade stress, no local extrusion deformation, and stable assurance of blade processing contour accuracy.

[0016] Furthermore, the hydraulic rod extends and retracts synchronously, causing the inner support members on both sides to extend synchronously into the inner hole of the turbine blade, and the extrusion protrusion expands radially for self-centering support of the inner hole of the blade.

[0017] Furthermore, the guide slide includes a base, which is horizontally positioned. A slide rail is fixed to the upper surface of the base, and a drive screw parallel to the slide rail is installed inside the base. The support plates open to avoid the control drive screw rotating in the forward direction, causing the hydraulic rods on the left and right support plates to slide in the opposite direction along the slide rail towards both ends of the base. The two sets of docking components and clamping components open synchronously, forming an intermediate workstation for blade loading. The robotic arm transports the turbine blades to be processed to the coaxial position between the two sets of clamping mechanisms.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] (i) This automatic positioning turbine blade processing device synchronously drives the two side support plates to feed via a drive screw. The hydraulic rod inner support mechanism and the clamping disc circumferential mechanism operate synchronously, completing the self-centering support of the blade's inner hole and the outer circumferential clamping in one operation, achieving high coaxiality between the inner and outer clamping. The evenly distributed annular inner support protrusions and arc-shaped clamping strips exert force evenly at multiple points, constraining the blade from both inside and outside, preventing radial displacement during processing. This improves the processing accuracy of the turbine blade profile and root coaxiality, resulting in strong dimensional consistency in batch processing.

[0020] (II) This automatic positioning turbine blade processing device, through outer circumferential synchronous clamping and external positioning, simultaneously completes the inner hole centering of the inner support component. Meanwhile, the hydraulic rod on the support plate continuously feeds in small increments. The clamping discs on both sides adhere to the outer walls of both ends of the blade, and multiple sets of arc-shaped clamping strips on the inner side of the positioning ring encircle the outer circle of the blade. Friction protection teeth tightly adhere to the outer wall of the blade, increasing the clamping friction force. Together with the internal support component, this forms a bidirectional synchronous clamping constraint between the inner support and the outer clamping, completing the fully automatic coaxial positioning of the turbine blade.

[0021] (III) This automatic positioning turbine blade machining device uses the elastic pads of the inner support and the friction protection teeth of the clamping disc to flexibly buffer cutting vibrations during machining, absorbing machining vibration forces and preventing slight blade vibration. The slide bar return spring locks the clamping disc, ensuring that the blade concentricity and clamping stiffness remain unchanged throughout the machining process. Multiple sets of annularly arranged positioning clamps and inner support are evenly stressed at multiple points, resulting in balanced blade stress, no local extrusion deformation, and stable assurance of blade machining profile accuracy.

[0022] (iv) This automatic positioning turbine blade processing device adjusts the distance between the two support plates via a drive screw to accommodate blades of different total lengths. The sliding rod drives the clamping plate to move axially, allowing for fine adjustment of the axial distance between the clamping plate and the inner support. Different radii of positioning clamps and different expansion sizes of inner support components can be replaced. One set of tooling can accommodate turbine blades of various outer diameters, inner holes, and lengths. The tooling is highly versatile, eliminating the need for custom-made fixtures for each type of blade, significantly reducing equipment procurement costs.

[0023] (v) The automatic positioning turbine blade processing device has polyurethane elastic pads on the outer side of the inner support, and flexible friction protective teeth on the inner arc-shaped clamping strip of the clamping disc. All contact surfaces between the tooling and the blade adopt a flexible buffer structure. On the one hand, it buffers cutting vibration and reduces machining burrs and dimensional deviations caused by vibrating cutters. On the other hand, it avoids direct squeezing and scratching of the blade blank surface by hard metal clamps, prevents indentation and bump defects, reduces subsequent polishing and grinding processes, and reduces processing losses and scrap rate. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is another schematic diagram of the overall structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the clamping component structure of the present invention;

[0027] Figure 4 This is a disassembled schematic diagram of the clamping component and docking component structure of the present invention;

[0028] Figure 5 This is a schematic diagram of the docking component structure of the present invention;

[0029] Figure 6 This is a schematic diagram of the structure of the present invention;

[0030] Figure 7 This is a disassembled schematic diagram of the docking component structure of the present invention;

[0031] Figure 8 This is a schematic diagram of the guide slide and clamping assembly structure of the present invention;

[0032] Figure 9 This is a schematic diagram of the clamping component structure of the present invention;

[0033] Figure 10 This is a disassembled schematic diagram of the clamping component structure of the present invention;

[0034] Figure 11 This is an enlarged schematic diagram of structure A of the present invention.

[0035] In the diagram: 1. Support plate; 2. Guide slide; 21. Base; 22. Drive screw; 23. Slide rail; 3. Connecting assembly; 31. Hydraulic rod; 32. Mounting seat; 33. Inner support; 331. Positioning shaft; 332. Extrusion protrusion; 333. Elastic pad; 334. Extrusion strip; 335. Limiting block; 4. Clamping assembly; 41. Clamping disc; 42. Assembly plate; 43. Slide rod; 44. Connecting frame; 45. Positioning ring; 46. Slot; 47. Positioning clamp; 471. Arc-shaped clamping strip; 472. Friction protection teeth; 473. Clamping block. Detailed Implementation

[0036] Example 1, as Figures 1 to 11 As shown, the present invention provides a technical solution: an automatic positioning turbine blade processing device, comprising: a guide slide 2, with support plates 1 symmetrically installed at both ends of the top of the guide slide 2; the support plates 1 are provided in two sets, and a docking assembly 3 and a clamping assembly 4 are respectively assembled on the inner side of the two sets of support plates 1; the clamping assembly 4 is slidably adapted to the guide slide 2; the operator locks and fixes the base 21 of the guide slide 2 to the worktable of the turbine blade CNC machining machine tool with four corner flange bolts, ensuring that the central axis of the device is coaxial with the machining spindle of the machine tool. The synchronous motors of the drive screws 22 on both sides are synchronously adjusted to ensure that the sliding displacement of the left and right support plates is completely synchronized.

[0037] The docking assembly 3 includes a hydraulic rod 31, which is fixedly installed on the outside of the support plate 1. The output shaft of the hydraulic rod 31 passes through the support plate 1 and is connected to a mounting base 32. An inner support member 33 is coaxially fixed to the end of the mounting base 32.

[0038] Furthermore, the clamping assembly 4 includes an assembly plate 42, which is fixed to the inner side of the support plate 1. Multiple sliding rods 43 are parallel to each other on the surface of the assembly plate 42. Each sliding rod 43 has a connecting frame 44 and a clamping disc 41 connected to its two ends. The clamping disc 41 is coaxially sleeved on the outer side of the inner support member 33. For blade specification adaptation and replacement, based on the outer diameter and inner hole size of the turbine blade to be processed, the original positioning clamp 47 in the slot 46 of the clamping disc 41 is disassembled. A positioning clamp 47 with a matching curvature is selected, and the snap-fit ​​block 473 is embedded into the slot 46 to complete the assembly of the arc-shaped clamping strip 471. Simultaneously, an inner support member 33 with a corresponding outer diameter is matched and locked and fixed to the end of the mounting base 32, completing the adaptation of the inner and outer clamping specifications.

[0039] Furthermore, a positioning ring 45 is provided at the center of the clamping disk 41, and multiple sets of positioning clamps 47 are evenly arranged circumferentially on the positioning ring 45. A groove 46 is formed between the positioning clamps 47 and the clamping disk 41. The starting slide rod 43, paired with a driving cylinder, pulls the connecting frame 44, causing the clamping disk 41 to slide axially along the slide rod 43, adjusting the axial distance between the clamping disk 41 and the inner support member 33 to match the axial length of the current turbine blade. A return spring assists the slide rod 43 in quickly returning to its original position, reserving a blade clamping position.

[0040] Furthermore, the slide rods 43 are evenly arranged circumferentially along the assembly plate 42, and a return spring is fitted on the outer side of the slide rods 43. The connecting frame 44 is connected to an external cylinder for drive. The cylinder drives the slide rods 43 to move the clamping plate 41 back and forth along the axial direction to adapt to turbine blades of different lengths. The two side mechanisms are synchronously aligned and close together, driving the lead screw 22 to rotate synchronously in opposite directions. The hydraulic rods 31 on the two side support plates 1 are synchronously fed towards each other along the slide rail 23. The left and right inner support members 33 and the clamping plate 41 synchronously move towards both ends of the blade. The inner support members 33 pass through the central positioning ring 45 of the clamping plate 41 and extend coaxially into the inner holes at both ends of the turbine blade.

[0041] Furthermore, the positioning clamp 47 includes an arc-shaped retaining strip 471, which is arranged along the arc of the positioning ring 45. Friction protection teeth 472 are evenly arranged on the inner sidewall of the arc-shaped retaining strip 471. A retaining block 473 is provided at the end of the arc-shaped retaining strip 471. The retaining block 473 is engaged in the retaining groove 46 for detachable assembly of the positioning clamp 47 and the clamping plate 41.

[0042] Furthermore, the clamping discs 41 on both sides move closer together with the support plate 1. The arc-shaped clamping strip 471 encircles the outer wall of the blade, used for automatic positioning of the blade's inner support and outer clamping. The positioning clamp 47 is detachably clamped to the slot 46 via the clamping block 473, allowing for quick replacement of positioning clamps 47 with different curvatures according to the turbine blade's outer diameter specifications. After the clamping mechanism releases the processing step, the hydraulic rod 31 retracts synchronously, pulling the mounting base 32 backward, causing the extrusion protrusion 332 to retract radially, releasing the blade's inner hole support. The sliding rod 43, paired with a cylinder, pulls the clamping disc 41 backward slightly, causing the arc-shaped clamping strip 471 to detach from the blade's outer wall, releasing the outer encircling clamping. The support plate opens to unload the material, driving the screw 22 to rotate forward. The hydraulic rods 31 on both sides of the support plate 1 drive the clamping assembly 4 and the docking assembly 3 to slide along the slide rail 23 to both ends. The two sets of clamping assemblies 4 and docking assemblies 3 fully open, releasing the processed turbine blade. The robotic arm picks up the finished turbine blades and transports them to the unloading station. The tooling resets, and the standby cylinders, hydraulic rods, and drive screws are all reset to their initial positions, ready to receive the next batch of turbine blades. The automatic positioning and processing process is executed cyclically.

[0043] Example 2, based on Example 1, such as Figures 3 to 6As shown, the inner support 33 further includes a positioning shaft 331. Multiple sets of extrusion protrusions 332 are evenly distributed around the outer periphery of the positioning shaft 331. Extrusion strips 334 are fixed to the outer sides of the extrusion protrusions 332. Elastic pads 333 cover the outer walls of the extrusion strips 334. Limiting blocks 335 are provided at the ends of the extrusion protrusions 332. While the inner support 33 completes the inner hole centering, the hydraulic rod 31 on the support plate 1 continuously feeds in small increments. The clamping discs 41 on both sides adhere to the outer walls of both ends of the blade, and multiple sets of arc-shaped clamping strips 471 encircle the outer circle of the blade on the inner side of the positioning ring 45. Friction protection teeth 472 tightly adhere to the outer wall of the blade, increasing the clamping friction. Together with the internal support, this forms a bidirectional synchronous clamping constraint between the inner support and the outer clamp, completing the fully automatic coaxial positioning of the turbine blade.

[0044] Furthermore, the elastic pad 333 is a polyurethane buffer pad, and the friction protection tooth 472 is an arc-shaped flexible tooth structure. The elastic pad 333 and the friction protection tooth 472 are flexibly fitted to the inner hole and outer wall of the blade, respectively. During the processing, the elastic pad 333 of the inner support 33 and the friction protection tooth 472 of the clamping plate 41 flexibly buffer the cutting vibration, absorb the processing vibration force, and avoid slight blade vibration. The drive screws 22 and slide rails 23 on both sides continuously lock the position of the support plate 1, and the slide rod 43 returns the spring to lock the clamping plate 41, ensuring that the blade concentricity and clamping stiffness remain unchanged throughout the processing. Multiple sets of annularly arranged positioning clamps 47 and inner support 33 are subjected to force at multiple points evenly, the blade is subjected to balanced force, there is no local compression deformation, and the blade processing contour accuracy is stably guaranteed.

[0045] Furthermore, the hydraulic rod 31 extends and retracts synchronously, causing the inner support members 33 on both sides to extend synchronously into the inner hole of the turbine blade, and the extrusion protrusion 332 expands radially for self-centering support of the inner hole of the blade.

[0046] Example 3, based on Examples 1 and 2, such as Figure 7 As shown, the guide slide 2 further includes a base 21, which is horizontally positioned. A slide rail 23 is fixed on the upper surface of the base 21, and a drive screw 22 parallel to the slide rail 23 is installed inside the base 21. The support plate opens to avoid the control drive screw 22 rotating in the forward direction, causing the hydraulic rods 31 on the left and right support plates 1 to slide in the opposite direction along the slide rail 23 towards both ends of the base 21. The two sets of docking components 3 and clamping components 4 open synchronously to form an intermediate station for blade loading. The robot arm transports the turbine blade to be processed to the coaxial position between the two sets of clamping mechanisms.

[0047] During use, the operator secures the base 21 of the guide slide 2 to the worktable of the CNC machining center for turbine blades using four corner flange bolts, ensuring that the central axis of the device is coaxial with the machining spindle of the machine tool. The synchronous motors of the drive screws 22 on both sides are then synchronously adjusted to ensure that the sliding displacement of the left and right support plates is completely synchronized.

[0048] For blade specification adaptation and replacement, based on the outer diameter and inner bore size of the turbine blade to be processed, disassemble the original positioning clamp 47 in the slot 46 of the clamping disc 41, select a positioning clamp 47 with matching curvature, and embed the snap-fit ​​block 473 into the slot 46 to complete the assembly of the arc-shaped clamping strip 471. At the same time, match the inner support 33 with the corresponding outer diameter, and lock and fix the inner support 33 to the end of the mounting base 32 to complete the adaptation of the inner and outer clamping specifications.

[0049] The starter slide rod 43 is equipped with a drive cylinder, which pulls the connecting frame 44 to drive the clamping plate 41 to slide axially along the slide rod 43, adjusting the axial distance between the clamping plate 41 and the inner support 33 to match the axial length of the current turbine blade. The return spring assists the slide rod 43 to quickly return to its original position, reserving a blade clamping position.

[0050] The support plate opens to avoid the control drive screw 22 rotating in the forward direction, causing the hydraulic rods 31 on the left and right support plates 1 to slide in the opposite direction along the slide rail 23 towards both ends of the base 21. The two sets of docking components 3 and clamping components 4 open synchronously to form the intermediate station for blade loading. The robot arm transports the turbine blade to be processed to the coaxial position between the two sets of clamping mechanisms. The two mechanisms synchronously center and move closer together, and the drive screw 22 rotates synchronously in the opposite direction. The hydraulic rods 31 on the two support plates 1 move synchronously towards each other along the slide rail 23. The left and right inner support members 33 and clamping disks 41 move synchronously towards both ends of the blade. The inner support members 33 pass through the central positioning ring 45 of the clamping disk 41 and extend coaxially into the inner holes at both ends of the turbine blade.

[0051] While the inner support member 33 completes the centering of the inner hole, the hydraulic rod 31 on the support plate 1 continuously feeds in small increments. The clamping discs 41 on both sides fit against the outer walls of both ends of the blade, and multiple sets of arc-shaped clamping strips 471 on the inner side of the positioning ring 45 encircle the outer circle of the blade. The friction protection teeth 472 fit tightly against the outer wall of the blade, increasing the clamping friction. Together with the internal support member, they form a two-way synchronous clamping constraint of inner support and outer clamping, completing the fully automatic coaxial positioning of the turbine blade.

[0052] During machining, the elastic pads 333 of the inner support 33 and the friction protection teeth 472 of the clamping disc 41 flexibly buffer cutting vibrations, absorb machining vibration forces, and prevent slight blade vibration. The slide rod 43 returns to the spring and locks the clamping disc 41, ensuring that the blade concentricity and clamping stiffness remain unchanged throughout the machining process. Multiple sets of annularly arranged positioning clamps 47 and inner support 33 are subjected to force at multiple points evenly, resulting in balanced force on the blade, no local extrusion deformation, and stable assurance of the blade machining profile accuracy.

[0053] After the clamping mechanism releases the machining process, the hydraulic rod 31 retracts synchronously, pulling the mounting base 32 backward, causing the extrusion protrusion 332 to retract radially, releasing the inner hole support of the blade. The sliding rod 43, with its matching cylinder, pulls the clamping plate 41 backward slightly, causing the arc-shaped clamping strip 471 to detach from the outer wall of the blade, releasing the outer clamping grip. The drive screw 22 rotates forward, and the hydraulic rods 31 on the two side support plates 1 drive the clamping assembly 4 and the docking assembly 3 to slide along the slide rail 23 to both ends. The two sets of clamping assemblies 4 and docking assemblies 3 fully open, releasing the machined turbine blade. The robotic arm picks up the finished blade and transports it to the unloading station. The tooling resets, and the standby cylinder, hydraulic rod, and drive screw all reset to their initial positions, waiting for the next batch of turbine blades to be loaded, cyclically executing the automatic positioning and machining process.

Claims

1. An automatic positioning steam turbine blade processing device, characterized in that, Includes a guide slide (2), with support plates (1) symmetrically installed at both ends of the top of the guide slide (2). The support plates (1) are provided in two sets, and a docking component (3) and a clamping component (4) are respectively assembled on the inner side of the two sets of support plates (1). The clamping component (4) is slidably adapted to the guide slide (2). The docking assembly (3) includes a hydraulic rod (31), which is fixedly installed on the outside of the support plate (1). The output shaft of the hydraulic rod (31) passes through the support plate (1) and is connected to a mounting base (32). An inner support member (33) is coaxially fixed at the end of the mounting base (32).

2. The automatic positioning turbine blade processing device according to claim 1, characterized in that: The clamping assembly (4) includes an assembly plate (42), which is fixed inside the support plate (1). Multiple slide rods (43) are parallel to each other on the surface of the assembly plate (42). The two ends of the slide rods (43) are respectively connected to a connecting frame (44) and a clamping plate (41). The clamping plate (41) is coaxially sleeved on the outside of the inner support member (33).

3. The automatic positioning turbine blade processing device according to claim 2, characterized in that: A positioning ring (45) is provided at the center of the clamping plate (41). The positioning ring (45) is provided with multiple sets of positioning clamps (47) evenly arranged in the circumferential direction. A groove (46) is formed between the positioning clamps (47) and the clamping plate (41).

4. The automatic positioning turbine blade processing device according to claim 3, characterized in that: The slide rod (43) is evenly arranged around the assembly plate (42). A return spring is fitted on the outside of the slide rod (43). The connecting frame (44) is connected to an external cylinder. The cylinder drives the slide rod (43) to move the clamping plate (41) back and forth along the axial direction to adapt to turbine blades of different lengths.

5. The automatic positioning turbine blade processing device according to claim 4, characterized in that: The positioning clamp (47) includes an arc-shaped retaining strip (471), which is arranged along the arc of the positioning ring (45). Friction protection teeth (472) are evenly arranged on the inner sidewall of the arc-shaped retaining strip (471). A retaining block (473) is provided at the end of the arc-shaped retaining strip (471). The retaining block (473) is engaged in the retaining groove (46) for the positioning clamp (47) and the clamping plate (41) to be detachably assembled.

6. The automatic positioning turbine blade processing device according to claim 5, characterized in that: The clamping discs (41) on both sides move closer together with the support plate (1). The arc-shaped clip (471) surrounds the outer wall of the blade and is used for automatic positioning of the blade's inner support and outer clamp. The positioning clamp (47) is detachably connected to the slot (46) through the snap-fit ​​block (473). Positioning clamps (47) with different curvatures can be quickly replaced according to the outer diameter specifications of the turbine blade.

7. The automatic positioning turbine blade processing device according to claim 6, characterized in that: The inner support member (33) includes a positioning shaft (331), and multiple sets of extrusion protrusions (332) are evenly distributed around the outer periphery of the positioning shaft (331). An extrusion strip (334) is fixed on the outer side of the extrusion protrusion (332), and an elastic pad (333) is wrapped around the outer wall of the extrusion strip (334). A limiting block (335) is provided at the end of the extrusion protrusion (332).

8. The automatic positioning turbine blade processing device according to claim 7, characterized in that: The hydraulic rod (31) extends and retracts synchronously, driving the inner support members (33) on both sides to extend synchronously into the inner hole of the turbine blade. The extrusion protrusion (332) expands radially for self-centering support of the inner hole of the blade.

9. The automatic positioning turbine blade processing device according to claim 8, characterized in that: The elastic pad (333) is a polyurethane buffer pad, and the friction protection tooth (472) is an arc-shaped flexible tooth structure. The elastic pad (333) and the friction protection tooth (472) are flexibly attached to the inner hole and outer wall of the blade, respectively.

10. The automatic positioning turbine blade processing device according to claim 1, characterized in that: The guide slide (2) includes a base (21), which is horizontally arranged. A slide rail (23) is fixed on the upper surface of the base (21), and a drive screw (22) for the parallel slide rail (23) is installed inside the base (21).

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