Blade processing sander

Abstract

The present application is suitable for the field of polishing equipment, and particularly relates to a blade processing polishing machine, which comprises a rack, a support plate arranged on the rack, a guide rod fixedly installed on the support plate and the top of the inner cavity of the rack, a group of sliding blocks slidingly arranged on the guide rod, a group of feeding telescopic rods rotatably installed on the rack, and the end of the feeding telescopic rod being rotatably connected with the sliding block; a positioning mechanism connected with the two groups of sliding blocks, the positioning mechanism being used for fixing and clamping a steam turbine blade and driving the steam turbine blade to swing; and a dynamic polishing mechanism fixedly installed on the outer wall of the rack. Through the arrangement of the two groups of clamps, one group of clamps is used for fixing standard workpieces, and the other group of clamps is used for fixing workpieces needing to be processed. Through profiling processing, the workpieces can be polished on both sides, the consistency of processing is ensured, and the workpieces of different sizes and shapes can be adapted, so that the practicability is high.

Description

Technical Field

[0001] The invention belongs to the technical field of grinding equipment, in particular to a grinding machine for blade processing. Background Art

[0002] A steam turbine, also known as a steam turbine engine, is a rotary steam-powered device. High-temperature, high-pressure steam passes through a fixed nozzle, accelerating into an airflow and then spraying onto blades. This causes the rotor, equipped with rows of blades, to rotate, simultaneously producing work. Steam turbines are a staple of modern thermal power plants and are also used in the metallurgical and chemical industries, as well as in ship propulsion systems.

[0003] During the production process of steam turbines, the turbine blades need to be polished to reduce the roughness of the turbine blade surface and thereby reduce the airflow resistance. However, turbine blades are special-shaped parts, and even blades on the same turbine come in a variety of sizes. Existing polishing equipment is unable to polish turbine blades of various sizes and shapes. Summary of the Invention

[0004] The purpose of the embodiment of the present invention is to provide a blade processing grinder, aiming to solve the problem that turbine blades are special-shaped parts, and even blades on the same turbine have various sizes, and existing grinding equipment cannot grind turbine blades of various sizes and shapes.

[0005] The embodiment of the present invention is implemented as follows: a blade processing grinding machine, the blade processing grinding machine comprising:

[0006] A frame, wherein a support plate is provided on the frame, a guide rod is fixedly installed on the support plate and the top of the frame cavity, a group of sliders are slidably provided on the guide rod, a group of feed telescopic rods are rotatably installed on the frame, and the ends of the feed telescopic rods are rotatably connected to the sliders;

[0007] A positioning mechanism connected to the two sets of sliders, the positioning mechanism is used to fix and clamp the turbine blades and drive the turbine blades to swing;

[0008] A dynamic grinding mechanism is fixedly mounted on the outer wall of the frame and is used for performing profile grinding on the turbine blades.

[0009] Preferably, the dynamic grinding mechanism includes a mounting bracket, wherein a horizontally arranged first cantilever and a second cantilever are fixedly mounted on the mounting bracket, the first cantilever is slidably connected to the first movable plate through a group of first sliding rods, the bottom of the first sliding rod is fixedly connected to the first U-shaped plate, a first spring is sleeved on the outer periphery of the first sliding rod, the two ends of the first spring are respectively fixedly connected to the first U-shaped plate and the first movable plate, a first electromagnet and a first magnet are respectively fixedly mounted on the first cantilever and the first movable plate, a movable probe is fixedly mounted on the bottom of the first movable plate, and a fixed probe is fixedly mounted on the top of the first U-shaped plate; the second cantilever is slidably connected to the second movable plate through a group of second sliding rods The movable plate, the second slide rod is fixedly connected to the second U-shaped plate at the bottom, the second slide rod is outerly sleeved with a second spring, the two ends of the second spring are respectively fixedly connected to the second U-shaped plate and the second movable plate, the second cantilever and the second movable plate are respectively installed with a second electromagnet and a second magnet, a second grinding head is provided at the bottom of the second movable plate, and a first grinding head is provided at the top of the second U-shaped plate, the first grinding head and the second grinding head are connected through a driving assembly, and the driving assembly is used to control the rotation of the first grinding head and the second grinding head; the first movable plate and the second movable plate are both provided with a first induction plate, and the first U-shaped plate and the second U-shaped plate are both provided with a second induction plate.

[0010] Preferably, the driving assembly includes a grinding motor, which is fixedly mounted on the second movable plate, a hollow shaft is connected to the rotating shaft of the second movable plate, a square shaft is sleeved in the hollow shaft, and the square shaft is rotatably mounted on the second U-shaped plate, a second pulley is connected to the first grinding head, a first pulley is mounted on the second grinding head, a third pulley is fixedly mounted on the hollow shaft, a fourth pulley is fixedly mounted on the square shaft, the first pulley and the third pulley are connected by a second transmission belt, and the second pulley and the fourth pulley are connected by the first transmission belt.

[0011] Preferably, the positioning mechanism includes a mounting shell, two groups of inner rings are provided in the mounting shell, an outer gear is fixed to the outer diameter of the inner ring, a plurality of positioning planetary gears are simultaneously engaged with the periphery of the outer gear, the positioning planetary gears are rotatably connected to the mounting shell, a group of power gears are rotatably provided on the mounting shell, the power gears are simultaneously engaged with the two groups of outer gears, the power gears are driven by a swing motor provided on the mounting shell, two groups of positioning telescopic rods are fixedly provided in the inner ring, and a threaded splint is fixedly installed on the positioning telescopic rods.

[0012] Preferably, five sets of positioning planetary gears are arranged on the periphery of the outer gear, and the five sets of positioning planetary gears are evenly distributed.

[0013] Preferably, two groups of avoidance holes are provided on the frame, and the avoidance holes are used for passing the workpiece.

[0014] Preferably, a positioning assembly is provided at the bottom of the frame.

[0015] A blade processing grinder provided in an embodiment of the present invention is provided with two sets of clamps, one set of clamps fixes a standard workpiece, and the other set of clamps fixes the workpiece to be processed. By performing profiling processing, the workpiece can be double-sided ground, thereby ensuring the consistency of processing and being adaptable to workpieces of different sizes and shapes, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a blade grinding machine provided in an embodiment of the present invention;

[0017] Figure 2 A right side view of a dynamic grinding mechanism provided by an embodiment of the present invention;

[0018] Figure 3 A schematic structural diagram of a positioning mechanism provided in an embodiment of the present invention;

[0019] Figure 4 A schematic structural diagram of a steam turbine blade provided in an embodiment of the present invention.

[0020] In the figure: 1, frame; 2, feeding telescopic rod; 3, support plate; 4, guide rod; 5, fixed seat; 6, slide block; 7, swing motor; 8, avoidance hole; 9, mounting bracket; 10, positioning rod; 11, first cantilever; 12, second cantilever; 13, first movable plate; 14, first U-shaped plate; 16, first electromagnet; 17, first magnet; 18, fixed probe; 19, movable probe; 20, first spring; 21, first slide block; 22, second electromagnet; 23, second magnet; 24, second movable plate; 25, Second U-shaped plate; 26. First grinding head; 27. First pulley; 28. Second grinding head; 29. ​​Second pulley; 30. First induction plate; 31. Second induction plate; 32. Grinding motor; 33. Third pulley; 34. Hollow shaft; 35. Square shaft; 36. Fourth pulley; 37. First transmission belt; 38. Second transmission belt; 39. Positioning planetary gear; 40. External gear; 41. Inner ring; 42. Positioning telescopic rod; 43. Threaded clamp; 44. Power gear; 100. Positioning mechanism; 200. Dynamic grinding mechanism. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0023] like Figure 1 FIG. 1 is a structural diagram of an xx device provided by one embodiment of the present invention, wherein the blade processing grinding machine includes:

[0024] A frame 1 is provided with a support plate 3, a guide rod 4 is fixedly installed on the support plate 3 and the top of the inner cavity of the frame 1, a group of sliders 6 are slidably provided on the guide rod 4, a group of feed telescopic rods 2 are rotatably installed on the frame 1, and the ends of the feed telescopic rods 2 are rotatably connected to the sliders 6;

[0025] A positioning mechanism 100, which is connected to the two sets of sliders 6, and is used to fix and clamp the turbine blades and drive the turbine blades to swing;

[0026] The dynamic grinding mechanism 200 is fixedly mounted on the outer wall of the frame 1 and is used for performing contour grinding on the turbine blades.

[0027] In this embodiment, during grinding, a group of polished standard parts are placed in the positioning mechanism 100 and fixed by the positioning mechanism 100. In the subsequent processing, the turbine blades to be processed are also placed in the positioning mechanism 100, and both are fixed at the same time. During processing, the dynamic grinding mechanism 200 is used for contour control to grind the workpiece according to the standard parts, and the feeding telescopic rod 2 can drive the slider 6 to move the entire positioning mechanism 100 forward by extending, and in this process, the positioning mechanism 100 can control the standard parts and the turbine blades to swing at the same time to achieve grinding of various positions on the turbine blades.

[0028] like Figure 1 、 Figure 2 and Figure 4As shown, as a preferred embodiment of the present invention, the dynamic grinding mechanism 200 includes a mounting bracket 9, on which a horizontally arranged first cantilever 11 and a second cantilever 12 are fixedly mounted, the first cantilever 11 is slidably connected to a first movable plate 13 through a group of first sliding rods 21, the bottom of the first sliding rod 21 is fixedly connected to a first U-shaped plate 14, a first spring 20 is sleeved on the outer periphery of the first sliding rod 21, the two ends of the first spring 20 are fixedly connected to the first U-shaped plate 14 and the first movable plate 13 respectively, a first electromagnet 16 and a first magnet 17 are fixedly mounted on the first cantilever 11 and the first movable plate 13 respectively, a movable probe 19 is fixedly mounted on the bottom of the first movable plate 13, and a fixed probe 18 is fixedly mounted on the top of the first U-shaped plate 14; the second cantilever 12 is connected to a first movable plate 13 through a group of second sliding rods A second movable plate 24 is slidably connected, and a second U-shaped plate 25 is fixedly connected to the bottom of the second slide rod. A second spring is sleeved on the outer periphery of the second slide rod, and both ends of the second spring are fixedly connected to the second U-shaped plate 25 and the second movable plate 24 respectively. A second electromagnet 22 and a second magnet 23 are installed on the second cantilever 12 and the second movable plate 24 respectively. A second grinding head 28 is provided at the bottom of the second movable plate 24, and a first grinding head 26 is provided at the top of the second U-shaped plate 25. The first grinding head 26 and the second grinding head 28 are connected through a driving assembly, and the driving assembly is used to control the rotation of the first grinding head 26 and the second grinding head 28; a first induction plate 30 is provided on both the first movable plate 13 and the second movable plate 24, and a second induction plate 31 is provided on both the first U-shaped plate 14 and the second U-shaped plate 25.

[0029] In this embodiment, during the contour grinding process, the thickness of the standard part at the current position is first measured, and then the corresponding position of the turbine blade is ground according to the thickness of the standard part. When the corresponding thickness is reached, the next processing area is switched to, and the grinding of the turbine blade is completed according to this process; the implementation steps of the above process are: the standard part and the turbine blade are fixed by the positioning mechanism 100 at the same time, and in order to facilitate the standard part to enter between the first U-shaped plate 14 and the first movable plate 13, the telescopic positioning rod 10 provided on the mounting bracket 9 is extended and inserted into the positioning hole on the first U-shaped plate 14 to limit the movement of the first U-shaped plate 14. At this time, the first electromagnet 16 is energized , control the first electromagnet 16 to maintain the opposite magnetic field to the first magnet 17, so that the two attract each other, then the distance between the first U-shaped plate 14 and the first movable plate 13 increases, which is convenient for the standard parts to enter. Based on the same principle, in order to facilitate the insertion of the turbine blades, the second electromagnet 22 is kept at the opposite magnetic pole to the second magnet 23, and the two attract each other, and the second U-shaped plate 25 is fixed by another set of telescopic positioning rods 10, then the distance between the second movable plate 24 and the second U-shaped plate 25 increases. After the standard parts and turbine blades are inserted, the magnetic poles of the first electromagnet 16 and the second electromagnet 22 are switched. At this time, the second electromagnet 22 maintains the same magnetic pole as the second magnet 23, and the two Mutual repulsion, control the first electromagnet 16 to maintain the same magnetic property as the first magnet 17, so that the two repel each other, and the telescopic positioning rod 10 is both out of the positioning hole. Then, under the action of the first spring 20 and the second spring, the distance between the first U-shaped plate 14 and the first movable plate 13 is reduced, and the distance between the second movable plate 24 and the second U-shaped plate 25 is reduced. The standard part is clamped between the movable probe 19 and the fixed probe 18. At this time, the distance between the first sensing plate 30 and the second sensing plate 31 is the distance between the movable probe 19 and the fixed probe 18. The distance between the first sensing plate 30 and the second sensing plate 31 is converted according to the capacitor principle, E = U / d, where , U is the potential difference, d is the distance between the two plates, and E is the electric field strength between the two plates, then d=U / E. By measuring the potential difference and the electric field strength, the distance between the two plates is determined, that is, the distance between the first induction plate 30 and the second induction plate 31. That is, the turbine blade needs to be polished to this thickness. Since the first cantilever 11 and the second cantilever 12 move synchronously, the measuring position of the standard part corresponds to the polishing position of the turbine blade. When the thickness at this polishing position is the same as the thickness of the standard part at this position, the first polishing head 26 and the second polishing head 28 stop polishing synchronously. At this time, the positioning mechanism 100 is used to drive the standard part and the turbine blade to swing or move synchronously to switch the polishing position.

[0030] like Figure 1 、 Figure 2 and Figure 4As shown, as a preferred embodiment of the present invention, the driving assembly includes a grinding motor 32, the grinding motor 32 is fixedly mounted on the second movable plate 24, the rotating shaft of the second movable plate 24 is connected with a hollow shaft 34, a square shaft 35 is sleeved in the hollow shaft 34, and the square shaft 35 is rotatably mounted on the second U-shaped plate 25, the first grinding head 26 is connected to the second pulley 29, the second grinding head 28 is mounted on the first pulley 27, the third pulley 33 is fixedly mounted on the hollow shaft 34, the fourth pulley 36 is fixedly mounted on the square shaft 35, the first pulley 27 and the third pulley 33 are connected by a second transmission belt 38, and the second pulley 29 and the fourth pulley 36 are connected by a first transmission belt 37.

[0031] In this embodiment, the process of driving the first grinding head 26 and the second grinding head 28 to rotate is: start the grinding motor 32, use the grinding motor 32 to drive the hollow shaft 34 to rotate, the inner cross-section of the hollow shaft 34 is rectangular, and the square shaft 35 can slide relative to the hollow shaft 34, but cannot rotate relative to the hollow shaft 34, then the square shaft 35 will rotate synchronously, then the third pulley 33 and the fourth pulley 36 will rotate synchronously, under the drive of the first transmission belt 37 and the second transmission belt 38, the first pulley 27 and the second pulley 29 also rotate synchronously, then the first grinding head 26 and the second grinding head 28 also rotate synchronously, due to the action of the second spring, the first grinding head 26 and the second grinding head 28 will be in close contact with the turbine blade to complete double-sided processing.

[0032] like Figure 1 and Figure 3 As shown, as a preferred embodiment of the present invention, the positioning mechanism 100 includes a mounting shell, and two groups of inner rings 41 are provided in the mounting shell. The outer diameter of the inner ring 41 is fixed with an outer gear 40, and the periphery of the outer gear 40 is simultaneously engaged with multiple positioning planetary gears 39. The positioning planetary gears 39 are rotatably connected to the mounting shell, and a group of power gears 44 are rotatably provided on the mounting shell. The power gears 44 are simultaneously engaged with the two groups of outer gears 40, and the power gears 44 are driven by a swing motor 7 provided on the mounting shell. Two groups of positioning telescopic rods 42 are fixedly provided in the inner ring 41, and a threaded clamp 43 is fixedly installed on the positioning telescopic rod 42.

[0033] In this embodiment, the clamping process is to place the standard parts and the blade roots of the turbine blades respectively into two sets of inner rings 41. The two sets of threaded clamps 43 in the inner rings 41 clamp the blade roots under the drive of the positioning telescopic rod 42 to complete the fixation. When it is necessary to control the swing of the standard parts or the turbine blades, the swing motor 7 is started, and the swing motor 7 drives the power gear 44 to rotate, and the power gear 44 drives the two sets of outer gears 40 to rotate synchronously. During this process, the positioning planetary gear 39 will limit the radial movement of the outer gear 40.

[0034] like Figure 1 As shown in FIG. 1 , as a preferred embodiment of the present invention, five sets of positioning planetary gears 39 are arranged on the periphery of the external gear 40 , and the five sets of positioning planetary gears 39 are evenly distributed.

[0035] like Figure 1 As shown, as a preferred embodiment of the present invention, two groups of avoidance holes 8 are provided on the frame 1, and the avoidance holes 8 are used to pass the workpiece.

[0036] like Figure 1 As shown, as a preferred embodiment of the present invention, a positioning assembly is provided at the bottom of the frame 1.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A blade processing grinding machine, characterized in that: The blade processing grinding machine includes: A frame (1), wherein a support plate (3) is provided on the frame (1), a guide rod (4) is fixedly installed on the support plate (3) and the top of the inner cavity of the frame (1), a group of sliders (6) are slidably provided on the guide rod (4), a group of feeding telescopic rods (2) are rotatably installed on the frame (1), and the ends of the feeding telescopic rods (2) are rotatably connected to the sliders (6); A positioning mechanism (100), the positioning mechanism (100) being connected to the two sets of sliders (6), the positioning mechanism (100) being used to fix and clamp the turbine blades and drive the turbine blades to swing; A dynamic grinding mechanism (200), the dynamic grinding mechanism (200) being fixedly mounted on the outer wall of the frame (1) and used for performing contour grinding on the turbine blades; The dynamic grinding mechanism (200) comprises a mounting bracket (9), on which a horizontally arranged first cantilever (11) and a second cantilever (12) are fixedly mounted, the first cantilever (11) is slidably connected to a first movable plate (13) via a set of first sliding rods (21), the bottom of the first sliding rod (21) is fixedly connected to a first U-shaped plate (14), a first spring (20) is sleeved on the periphery of the first sliding rod (21), the two ends of the first spring (20) are fixedly connected to the first U-shaped plate (14) and the first movable plate (13), a first electromagnet (16) and a first magnet (17) are fixedly mounted on the first cantilever (11) and the first movable plate (13), a movable probe (19) is fixedly mounted on the bottom of the first movable plate (13), and a fixed probe (18) is fixedly mounted on the top of the first U-shaped plate (14); the second cantilever (12) is slidably connected to a second movable plate (13) via a set of second sliding rods. A movable plate (24), a second U-shaped plate (25) is fixedly connected to the bottom of the second slide bar, a second spring is provided on the outer periphery of the second slide bar, and both ends of the second spring are fixedly connected to the second U-shaped plate (25) and the second movable plate (24), respectively. A second electromagnet (22) and a second magnet (23) are respectively installed on the second cantilever (12) and the second movable plate (24), a second grinding head (28) is provided at the bottom of the second movable plate (24), a first grinding head (26) is provided at the top of the second U-shaped plate (25), the first grinding head (26) and the second grinding head (28) are connected through a driving component, and the driving component is used to control the rotation of the first grinding head (26) and the second grinding head (28); a first induction plate (30) is provided on both the first movable plate (13) and the second movable plate (24), and a second induction plate (31) is provided on both the first U-shaped plate (14) and the second U-shaped plate (25).

2. The blade processing grinding machine according to claim 1, characterized in that: The driving assembly includes a grinding motor (32), the grinding motor (32) is fixedly mounted on the second movable plate (24), a hollow shaft (34) is connected to the rotating shaft of the second movable plate (24), a square shaft (35) is sleeved in the hollow shaft (34), and the square shaft (35) is rotatably mounted on the second U-shaped plate (25), a second pulley (29) is connected to the first grinding head (26), a first pulley (27) is mounted on the second grinding head (28), a third pulley (33) is fixedly mounted on the hollow shaft (34), a fourth pulley (36) is fixedly mounted on the square shaft (35), the first pulley (27) and the third pulley (33) are connected via a second transmission belt (38), and the second pulley (29) and the fourth pulley (36) are connected via a first transmission belt (37).

3. The blade grinding machine according to claim 1, characterized in that: The positioning mechanism (100) includes a mounting shell, wherein two groups of inner rings (41) are provided in the mounting shell, an outer gear (40) is fixed on the outer diameter of the inner ring (41), and a plurality of positioning planetary gears (39) are simultaneously meshed on the periphery of the outer gear (40), and the positioning planetary gears (39) are rotatably connected to the mounting shell, and a group of power gears (44) is rotatably provided on the mounting shell, and the power gears (44) are simultaneously meshed with the two groups of outer gears (40), and the power gears (44) are driven by a swing motor (7) provided on the mounting shell, and two groups of positioning telescopic rods (42) are fixedly provided in the inner ring (41), and a threaded clamp (43) is fixedly installed on the positioning telescopic rod (42).

4. The blade processing grinding machine according to claim 3, characterized in that: Five sets of positioning planetary gears (39) are arranged on the periphery of the external gear (40), and the five sets of positioning planetary gears (39) are evenly distributed.

5. The blade processing grinding machine according to claim 1, characterized in that: Two groups of avoidance holes (8) are provided on the machine frame (1), and the avoidance holes (8) are used for passing workpieces.

6. The blade grinding machine according to claim 1, characterized in that: A positioning assembly is provided at the bottom of the frame (1).

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