Double-tilting type clamp device for milling turbine blade

Abstract

The utility model discloses a double-tilting type clamp device for milling a turbine blade, and relates to the field of tool clamps for machining and assembling the turbine blade, the double-tilting type clamp device comprises a positioning base, a rotating base and a rotating cushion block, the rotating base and the rotating cushion block can independently rotate around respective rotating axes, and the blade to be repaired and assembled is fixed on the rotating cushion block by a fan-shaped pressing plate; the rotating angles of the rotating base and the rotating cushion block can be changed to machining accurate angles by adjusting the adjusting cushion block, and the rotating base and the rotating cushion block are locked and fixed by the rotating positioning bolt; the double-axis rotating mode is adopted, machining of the radial complex angle plane of the blade can be completed after clamping and positioning, the blade clamping and fixing effect, the positioning precision and the machining stability of the tool are improved, the structure is simple, operation is convenient and fast, and the application range is wide.

Description

Technical Field

[0001] The utility model relates to the field of tooling fixtures for the processing and assembly of steam turbine blades, and particularly to a double-tilting fixture device for milling steam turbine blades. Background Technique

[0002] The blade is the "heart" of a steam turbine and is a very important part of the steam turbine. It undertakes the function of converting the thermal energy of steam or gas into mechanical energy. During the blade assembly process, it is required that the blade root must have precise thickness and taper. On the one hand, it can make the last blade fit accurately at the locking port of the wheel groove, and on the other hand, it can also ensure that all the blades in the wheel groove fit tightly. Therefore, a certain margin is reserved for the back arc part of individual blades during processing and is further trimmed according to the assembly situation.

[0003] Steam turbine blade products have the characteristics of a wide variety and small batch size. The back arc radial plane of some blades is a complex-angle plane, which rotates a radial angle α relative to the xoz plane and also rotates an angle β relative to the xoy plane. When trimming the back arc surface of such blades on a milling machine, it cannot be directly clamped, and there are also problems such as poor machining accuracy and low efficiency, which seriously affect the subsequent blade assembly link. Therefore, it is urgent to design a general-purpose tooling fixture to ensure the smooth progress of the blade trimming and processing work. Content of the Utility Model

[0004] The purpose of the utility model is to provide a double-tilting fixture device for milling steam turbine blades, so as to solve the technical problems such as poor machining accuracy and low efficiency caused by improper clamping of blades in the prior art.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: a double-tilting fixture device for milling steam turbine blades, including a positioning base and a rotating base arranged between the left and right side plates of the base. The rotating base is L-shaped, and a rotating pad is arranged on the rotating base. The rotating base and the rotating pad cooperate to form a space for accommodating the steam turbine blade; a rotating support rod is arranged through the rotating base along the length direction of the bottom of the rotating base, and both ends of the rotating support rod pass through the side plates of the positioning base, so that the whole rotating base can rotate around the rotating support rod. A first limiting component for adjusting the rotation angle of the rotating base is arranged below the front end of the positioning base; the rotating pad is fixed to the front side of the back plate of the rotating base by two bolts, and the rotating pad can rotate around the axis of one of the bolts. A second limiting component for adjusting the rotation angle of the rotating pad is arranged below one end of the rotating pad, and a sector-shaped pressing plate is installed on the front side of the other end of the rotating pad. The sector-shaped pressing plate is used to clamp the steam turbine blade from the side.

[0006] Preferably, the first limiting component includes a first fixing plate, a second adjusting bolt and a first adjusting pad. The first fixing plate is arranged on the front end face of the positioning base. The first adjusting pad is located behind the first fixing plate. The second adjusting bolt passes through the first fixing plate and then is connected to the first adjusting pad. The surface of the first adjusting pad in contact with the rotating base is a slope surface, and the slope surface of the first adjusting pad is used to adjust and support the rotating base.

[0007] Preferably, the first fixing plate is fixed to the front end face of the positioning base by welding.

[0008] Preferably, the second limiting component includes a second fixing plate, a third adjusting bolt and a second adjusting pad. The second fixing plate is arranged at one inner end of the rotating base. The third adjusting bolt passes through the second fixing plate from the side and then is connected to the second adjusting pad. The surface of the second adjusting pad in contact with the rotating pad is a slope surface, and the slope surface of the second adjusting pad is used to adjust and support the rotating pad.

[0009] Preferably, the second fixing plate is fixed to one inner end of the rotating base by welding.

[0010] Preferably, rotating positioning holes and rotating axis holes are arranged at upper and lower intervals on both side plates of the positioning base. The rotating positioning holes are arc-shaped. A first rotating positioning bolt connected to the rotating base penetrates through the rotating positioning holes. The whole rotating base can rotate along the rotating positioning holes. Both ends of the rotating support rod are installed in the rotating axis holes.

[0011] Preferably, bolt holes and waist-shaped positioning holes are formed in the back surface of the rotating base. A rotating support bolt is connected between the bolt hole and the rotating pad. A second rotating positioning bolt connected to the rotating pad penetrates through the waist-shaped positioning hole. The length direction of the waist-shaped positioning hole is perpendicular to the direction of the rotating support rod.

[0012] Preferably, an opening groove is arranged on the bottom plate of the positioning base and is fixed to the milling machine workbench by fixing bolts.

[0013] Preferably, a copper gasket is arranged between the rotating pad and the rotating base to avoid knocking and abrasion on both side faces of the blade.

[0014] Preferably, the sector pressing plate is installed on the rotating pad through a first adjusting bolt.

[0015] According to the above technical solution, the beneficial effects of the present utility model are as follows:

[0016] 1. In the present utility model, through the arrangement of the rotating pad and the sector pressing plate, the contact mode between the blade to be repaired and the tooling is surface contact, so that the blade is fixed firmly and the force is uniform, improving the clamping and fixing effect of the blade and making it more stable during processing.

[0017] 2. Each rotating device of the present utility model adopts a dual positioning form of adjusting cushion blocks for support and fixing bolts for locking, effectively improving the positioning accuracy and processing stability of the blades, and avoiding dimensional errors caused by frequent manual positioning adjustment during the processing.

[0018] 3. The structure of the present utility model is simple and the operation is convenient. At the same time, it has strong applicability to different types of blades, effectively solving the problem that a large number of special fixture tools need to be invested for small batches and various types of steam turbine blades. It not only shortens the product manufacturing cycle but also reduces the production cost. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the present utility model;

[0020] Figure 2 is a schematic structural diagram of another perspective of the present utility model.

[0021] Markings in the figure: 1. positioning base, 2. rotating support rod, 3. first rotating positioning bolt, 4. rotating base, 5. rotating cushion block, 6. copper gasket, 7. blade, 8. sector pressing plate, 9. first adjusting bolt, 10. fixing bolt, 11. second adjusting bolt, 12. first fixing plate, 13. first adjusting cushion block, 14. second adjusting cushion block, 15. third adjusting bolt, 16. second fixing plate, 17. rotating support bolt, 18. second rotating positioning bolt. Specific Embodiments

[0022] The following further details the present utility model in conjunction with the drawings and specific embodiments.

[0023] The structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limited conditions under which the present utility model can be implemented. Therefore, they do not have technical essential significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model.

[0024] Meanwhile, it should be noted that unless otherwise specified, the orientation or positional relationship indicated by terms such as "upper", "lower", "front end", "back end", etc. is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. The change or adjustment of its relative relationship, without substantial change in the technical content, should also be regarded as the scope within which the present utility model can be implemented. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0025] As Figure 1 , Figure 2 shown, the device mainly includes parts such as a positioning base 1, a rotating base 4, a rotating cushion block 5, a first adjusting cushion block 13, a second adjusting cushion block 14, a first rotating positioning bolt 3, a second rotating positioning bolt 18, a first adjusting bolt 9, a second adjusting bolt 11, a third adjusting bolt 15, a first fixing plate 12, a second fixing plate 16, a rotating support rod 2, a rotating support bolt 17, a sector pressing plate 8, etc.

[0026] In this embodiment, the bottom plate of the positioning base 1 is rectangular, and two open slots are respectively provided on the front end face and the back end face. The open slots are stepped surfaces, and the positioning base 1 is fixed to the milling machine workbench by installing fixing bolts 10 through the open slots.

[0027] Both side ends of the positioning base 1 are provided with two side plates, and the two side plates are L-shaped. Rotating positioning holes and rotating axis holes are provided at intervals up and down on the two side plates. The rotating positioning holes are arc-shaped. Two first rotating positioning bolts 3 pass through the rotating positioning holes and are fixedly connected to the side wall of the rotating base 4. A rotating support rod 2 is arranged through the bottom of the rotating base 4 along its length direction. Both ends of the rotating support rod 2 are installed in the rotating axis holes. The rotating base 4 is rotationally arranged on the two side plates of the positioning base 1 through the rotating support rod 2 and the axes of the two first rotating positioning bolts 3. The whole rotating base 4 can rotate along the axis of the rotating support rod 2. A first limiting component for restricting the rotation angle of the rotating base 4 is arranged below the front end of the positioning base 1.

[0028] The first limiting component includes a first fixing plate 12, a first adjusting cushion block 13 and a first adjusting cushion block 13. The first fixing plate 12 is welded on the front end face of the positioning base 1. The first adjusting cushion block 13 is located behind the first fixing plate 12. Two second adjusting bolts 11 are provided. After passing through the first fixing plate 12, the two second adjusting bolts 11 are connected to the first adjusting cushion block 13. The first adjusting cushion block 13 is an inclined surface cushion block. The surface of the first adjusting cushion block 13 in contact with the rotating base 4 is a slope surface. The slope surface of the first adjusting cushion block 13 is used to fixedly support the rotating base 4.

[0029] A rotating base 4 is arranged between the left and right side plates of the positioning base 1, and a rotating cushion block 5 is arranged on the rotating base 4. The rotating base 4 is L-shaped. Bolt holes and waist-shaped positioning holes are formed in the back surface of the rotating base 4. The length direction of the waist-shaped positioning hole is perpendicular to the direction of the rotating support rod 2. The rotating support bolt 17 passes through the bolt hole and is connected to the rotating cushion block 5. The second rotating positioning bolt 18 is connected to the rotating cushion block 5 through the waist-shaped positioning hole. The rotating cushion block 5 is arranged on the rotating base 4 through the rotating support bolt 17 and the second rotating positioning bolt 18. The whole rotating cushion block 5 can rotate around the axis of the rotating support bolt 17. The rotating cushion block 5 and the rotating base 4 cooperate to form a space for accommodating the steam turbine blade 7. A second limiting component for limiting the rotation angle of the rotating cushion block 5 is arranged below one end of the rotating cushion block 5 and below the front end of the positioning base 1. The middle part of the rotating cushion block 5 can place the blade 7 to be repaired and matched. A sector pressing plate 8 is installed on the front side of the other end of the rotating cushion block 5. The sector pressing plate 8 is installed on the rotating cushion block 5 through the first adjusting bolt 9. The sector pressing plate 8 can clamp the blade 7 to be repaired and matched from the side.

[0030] The second limiting component includes a second fixing plate 16, a third adjusting bolt 15 and a second adjusting cushion block 14. The second fixing plate 16 is fixed to the inner end of the rotating base 4. An inner hole is provided on the second fixing plate 16 to connect the third adjusting bolt 15. The third adjusting bolt 15 passes through the inner hole and is connected to the second adjusting cushion block 14. The second adjusting cushion block 14 is an inclined plane cushion block. The surface of the second adjusting cushion block 14 in contact with the rotating cushion block 5 is a slope surface. The slope surface of the second adjusting cushion block 14 is used to fixedly support the rotating cushion block 5.

[0031] In this embodiment, a copper gasket 6 is arranged between the rotating cushion block 5 and the rotating base 4. The copper gasket 6 is strip-shaped to avoid knocking and wearing on both sides of the blade 7.

[0032] When in use, first loosen the first adjusting bolt 9, place the blade 7 to be repaired on the rotating pad 5, place the copper pad 6 at the rear end of the blade 7, rotate the first adjusting bolt 9, and drive the fan-shaped pressure plate 8 to clamp the blade 7 to be repaired from the side; secondly, loosen the rotating support bolt 17 and the second rotating positioning bolt 18, loosen the third adjusting bolt 15, adjust the position of the second adjusting pad 14, and adjust the rotation angle of the rotating pad 5 by the slope surface of the second adjusting pad 14 close to the bottom surface of the rotating pad 5. As the rotation angle changes, one end of the rotating pad 5 slides in the length direction of the waist-shaped positioning hole through the second rotating positioning bolt 18. After the second adjusting pad 14 adjusts the rotating pad 5 to the optimal processing position, tighten the third adjusting bolt 15 to lock and fix the position of the second adjusting pad 14, tighten the rotating support bolt 17 and the second rotating positioning bolt 18 to lock and fix the position of the rotating pad 5, and the locking of the rotating support bolt 17 and the second rotating positioning bolt 18 and the slope surface of the second adjusting pad 14 The support and clamping play a double positioning role for the rotating pad 5; then, loosen the two first rotation positioning bolts 3, loosen the two second adjusting bolts 11, adjust the position of the first adjusting pad 13, and drive the rotating angle of the rotating base 4 to be adjusted by the slope surface of the first adjusting pad 13 close to the bottom surface of the rotating base 4. As the rotation angle changes, the upper end of the rotating base 4 slides in the length direction of the arc-shaped rotation positioning hole through the two first rotation positioning bolts 3. After the first adjusting pad 13 adjusts the rotating base 4 to the optimal processing position, tighten the two second adjusting bolts 11 to lock and fix the position of the first adjusting pad 13, tighten the two first rotation positioning bolts 3 to lock and fix the position of the rotating base 4, and the rotating base 4 is double positioned by the locking of the two first rotation positioning bolts 3 and the supporting clamping of the slope surface of the first adjusting pad 13; at this point, the clamp can realize the clamping and fixing of the blade 7 and the adjustment of the angle of the plane to be processed, which meets the design requirements of the double-tilt clamp device.

[0033] It should be noted that the above embodiments are only used to illustrate the present utility model, but the present utility model is not limited to the above embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model fall within the protection scope of the present utility model.

Claims

1. A double-tilting fixture device for milling steam turbine blades, characterized in that: It includes a positioning base (1) and a rotating base (4) arranged between the left and right side plates of the base. The rotating base (4) is L-shaped, and a rotating cushion block (5) is arranged on the rotating base (4). The rotating base (4) and the rotating cushion block (5) cooperate to form a space for accommodating the steam turbine blade (7). A rotating support rod (2) is arranged through the bottom of the rotating base (4) along its length direction. Both ends of the rotating support rod (2) pass through the two side plates of the positioning base (1), so that the whole rotating base (4) can rotate around the rotating support rod (2). A first limiting component for adjusting the rotation angle of the rotating base (4) is arranged below the front end of the positioning base (1). The rotating cushion block (5) is fixed to the front side of the back plate of the rotating base (4) by two bolts, and the rotating cushion block (5) can rotate around the axis of one of the bolts. A second limiting component for adjusting the rotation angle of the rotating cushion block (5) is arranged below one end of the rotating cushion block (5). A sector pressing plate (8) is installed on the front side of the other end of the rotating cushion block (5), and the sector pressing plate (8) is used to clamp the steam turbine blade (7) from the side.

2. The double-tilting fixture device for milling steam turbine blades according to claim 1, characterized in that: The first limiting component includes a first fixing plate (12), a second adjusting bolt (11) and a first adjusting cushion block (13). The first fixing plate (12) is arranged on the front end face of the positioning base (1). The first adjusting cushion block (13) is located at the rear side of the first fixing plate (12). The second adjusting bolt (11) passes through the first fixing plate (12) and then is connected to the first adjusting cushion block (13). The surface of the first adjusting cushion block (13) in contact with the rotating base (4) is a slope surface, and the slope surface of the first adjusting cushion block (13) is used to adjust and support the rotating base (4).

3. The double-tilting fixture device for milling steam turbine blades according to claim 2, characterized in that: The first fixing plate (12) is fixed to the front end face of the positioning base (1) by welding.

4. The double-tilting fixture device for milling steam turbine blades according to claim 1, wherein: The second limiting component includes a second fixing plate (16), a third adjusting bolt (15) and a second adjusting cushion block (14). The second fixing plate (16) is arranged at one inner end of the rotating base (4). The third adjusting bolt (15) passes through the second fixing plate (16) from the side and then is connected to the second adjusting cushion block (14). The surface of the second adjusting cushion block (14) in contact with the rotating cushion block (5) is a slope surface, and the slope surface of the second adjusting cushion block (14) is used to adjust and support the rotating cushion block (5).

5. The double-tilting fixture device for milling steam turbine blades according to claim 4, characterized in that: The second fixing plate (16) is fixed to one inner end of the rotating base (4) by welding.

6. The double-tilting fixture device for milling steam turbine blades according to claim 1, characterized in that: Rotating positioning holes and rotating axis holes are arranged at upper and lower intervals on the two side plates of the positioning base (1). The rotating positioning holes are arc-shaped. A first rotating positioning bolt (3) connected to the rotating base (4) is arranged through the rotating positioning holes. The whole rotating base (4) can rotate along the rotating positioning holes. Both ends of the rotating support rod (2) are installed in the rotating axis holes.

7. The double-tilting fixture device for milling steam turbine blades according to claim 1, characterized in that: Boltholes and waist-shaped positioning holes are formed on the back of the rotating base (4). A rotating support bolt (17) is connected between the bolthole and the rotating cushion block (5). A second rotating positioning bolt (18) connected to the rotating cushion block (5) is arranged through the waist-shaped positioning hole. The length direction of the waist-shaped positioning hole is perpendicular to the direction of the rotating support rod (2).

8. The double-tilting fixture device for milling steam turbine blades according to claim 1, characterized in that: The bottom plate of the positioning base (1) is provided with an opening groove and is fixed to the milling machine workbench through a fixing bolt (10).

9. The double-tilting fixture device for milling steam turbine blades according to claim 1, characterized in that: A copper gasket (6) is provided between the rotating pad (5) and the rotating base (4) to avoid knocking and wear on both sides of the blade (7).

10. The double-tilting fixture device for milling steam turbine blades according to claim 1, characterized in that: The sector pressing plate (8) is installed on the rotating pad (5) through a first adjusting bolt (9).

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