Split type root crown supporting seat of turbine blade forge piece drilling tool

Abstract

The steam turbine blade forge piece drilling tool split type root crown supporting seat comprises a ruler, a first positioning block and a second positioning block, the first positioning block and the second positioning block are both slidably connected to the ruler, the front end of the first positioning block is in threaded connection with a first tightening bolt parallel to the ruler in a screwed mode, and the front end of the second positioning block is in threaded connection with a second tightening bolt parallel to the ruler. The top end of the second positioning block is in threaded connection with a second tightening bolt perpendicular to the scale, the rear side of the second positioning block is further in threaded connection with a plurality of third tightening bolts parallel to the scale, a pair of penetrating grooves are symmetrically formed in the two ends of the scale in a penetrating mode, and sliding nuts are slidably connected into the penetrating grooves. The first positioning block and the second positioning block are connected with the sliding nuts in a locking mode through connecting bolts. Parts for forming the blade root supporting seat and the blade crown supporting seat are universal, redesign and remanufacturing of each product are not needed, the manufacturing period of a drilling tool is shortened, manufacturing of a blade root drill plate and a blade crown drill plate of each product is not needed, the material cost and the machining cost are saved, and the production efficiency is high.

Description

Technical Field

[0001] The present invention relates to the technical field of processing tools for steam turbine blade forgings, in particular to a split root and crown support seat for a drill for steam turbine blade forgings. Background Art

[0002] To facilitate the subsequent processing of steam turbine die-forged blades from forgings to parts, it is necessary to find the central axis of the blade by drilling a central hole in the forging. The drilling positions are usually a single hole at the crown end and three holes at the root end of the blade. These holes are commonly referred to as thimble holes in the industry.

[0003] Currently, when drilling, it is necessary to fix the blade forging in the drill through a support seat. In order to make the drilling positions of the root and crown of the forging blade placed in the existing drill for the forging support seat correspond to the drilling holes on the root drill template and crown drill template of the drill, a forging support seat that is individually designed and matched for each forging is adopted. After the forging is placed, the drilling positions required for the root and crown of the forging exactly correspond to the drilling holes on the root drill template and crown drill template of the drill, and then drilling can be carried out quickly. As Figure 1 shown, the forging support seat includes a root support seat A and a crown support seat B. Both the root support seat A and the crown support seat B are integrated and are respectively consistent with the outer contours of the corresponding forging root and crown. Since it is necessary to manufacture a corresponding forging support seat for each forging, there are problems such as cumbersome design, long manufacturing cycle, high manufacturing cost, and low production efficiency.

[0004] Therefore, we propose a split root and crown support seat for a drill for steam turbine blade forgings to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a split root and crown support seat for a drill for steam turbine blade forgings to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: Split root crown support seat for turbine blade forging drill, including two scales, on which a first positioning block and a second positioning block are slidably connected. A tightening bolt one parallel to the scale is screwed at the front end of the first positioning block. A tightening bolt two perpendicular to the scale is screwed at the top of the second positioning block, and several tightening bolts three parallel to the scale are also screwed at the rear side of the second positioning block. A pair of through slots are symmetrically opened at both ends of the scale, and a sliding nut is slidably connected inside the through slots. The first positioning block and the second positioning block are locked and connected to the sliding nut through connecting bolts. Among them, the first positioning block is of a special-shaped structure, and the second positioning block is of a Z-shaped structure. The special-shaped first positioning block has a vertical surface and an inclined surface. The vertical surface contacts the vertical part of the second positioning block, and the inclined surface forms an angle with the vertical part. The bottom of the turbine blade forging is supported on the inclined surface, and its back relies on the vertical part of the second positioning block. The middle of the first positioning block is hollow.

[0007] In a further embodiment, a chute is opened on the upper surface of the scale, and convex ribs matching the chute are provided on the lower surfaces of the first positioning block and the second positioning block.

[0008] In a further embodiment, a pair of connection holes are also opened through the middle of the scale.

[0009] In a further embodiment, scale lines are evenly provided along the length direction on the side of the scale.

[0010] In a further embodiment, the angle between the inclined surface and the vertical part of the second positioning block is 60°.

[0011] In a further embodiment, the upper notch size of the through slot is smaller than its lower notch size, and the sliding nut is matched with the lower notch of the through slot.

[0012] In a further embodiment, five tightening bolts three are provided, and the tightening bolts three are equidistantly distributed along the vertical direction of the second positioning block.

[0013] Another object of the present invention is to provide a general drill for turbine blade forgings, including a split root crown support seat, and further including a first drill base and a second drill base that are slidably connected to each other. The horizontal parts of the first drill base and the second drill base are stacked up and down, and the two horizontal parts are slid through a slider rail. Both the first drill base and the second drill base are L-shaped. One scale is directly placed on the horizontal part of the first drill base, and the other scale is placed on the horizontal part of the second drill base through a cushion block. A cushion block is also provided at the bottom of the first drill base. The two cushion blocks are used to keep the two scales at the same height. The vertical parts of the first drill base and the second drill base are a blade root drill template and a blade crown drill template respectively. Drill holes corresponding to the thimble holes required to be drilled at the blade root and blade crown of the turbine blade forging are respectively provided on the blade root drill template and the blade crown drill template.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the present invention, the root and crown support seat includes a blade root support seat and a blade crown support seat. The blade root support seat and the blade crown support seat have the same structure, and both the blade root support seat and the blade crown support seat are split-type. This root and crown support seat is no longer a customized type, but can be adapted to forgings of different specifications, and it can ensure that after different forgings are placed, the positions of the holes required for the blade root and blade crown of the forging can be adjusted, that is, the positions of the holes required for the blade root and blade crown of the forging correspond to the holes on the blade root drill template and the blade crown drill template of the drill tool respectively. Specifically: By moving the first positioning block and the second positioning block to the designated positions on the scale, the positions of the holes required for the blade root and blade crown of the forging can be made to be adjacent to the holes on the blade root drill template and the blade crown drill template of the drill tool respectively. Then, by observing the data on the scale and further adjusting the first positioning block, since the inclined plane of the first positioning block supports the bottom of the forging, when the first positioning block moves, the forging can be made to move in the horizontal and vertical directions until the positions of the holes required for the blade root and blade crown of the forging correspond exactly to the holes on the blade root drill template and the blade crown drill template of the drill tool.

[0015] 2. Short manufacturing cycle: The parts that make up the blade root and blade crown support seats are all common, and there is no need to redesign and remanufacture each product, which shortens the manufacturing cycle of the drill tool.

[0016] 3. Low manufacturing cost: There is no need to manufacture a blade root drill template and a blade crown drill template for each product, saving material costs and machining costs.

[0017] 4. High production efficiency: After processing one product, directly loosen the connecting bolts, slide the positioning block to the next working position, and then tighten the connecting bolts, and the drill tool can be quickly adjusted. The adjustment time of the drill tool is greatly shortened, and the production efficiency is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the prior art; Figure 2 is a schematic structural diagram of the application state of the present invention; Figure 3 is a schematic structural diagram of the present invention; Figure 4 is a schematic top view structural diagram of the scale of the present invention; Figure 5 is a schematic bottom view structural diagram of the scale of the present invention; Figure 6 is a schematic structural diagram of the connection between the first positioning block and the sliding nut of the present invention.

[0019] Appendix Figure 2-6The description is as follows: 1. Scale; 11. Slot; 12. Slide groove; 13. Connecting hole; 2. First positioning block; 21. Inclined plane; 3. Second positioning block; 4. First tightening bolt; 5. Second tightening bolt; 6. Third tightening bolt; 7. Sliding nut; 8. Connecting bolt; 9. Convex rib; 10. First drill base; 20. Second drill base. Specific implementation mode

[0020] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention 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, and thus should not be construed as a limitation to the present invention. In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0021] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection" and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to Figure 2-6, The split root crown support seat of the drill for steam turbine blade forgings includes two scales 1. On both scales 1, a first positioning block 2 and a second positioning block 3 are slidably connected and can slide along the length direction of the scale 1. A tightening bolt 1 parallel to the scale 1 is threadedly connected to the front end of the first positioning block 2 for pressing against the front end face of the blade forging. A tightening bolt 2 perpendicular to the scale 1 is threadedly connected to the top of the second positioning block 3 for pressing against the upper edge of the blade forging. And several tightening bolts 3 parallel to the scale 1 are also threadedly connected to the rear side of the second positioning block 3. There are five tightening bolts 3, and the tightening bolts 3 are equally spaced along the vertical direction of the second positioning block 3, which are used to assist in locking the blade forging with an irregular rear side. A pair of through slots 11 are symmetrically opened through both ends of the scale 1. The through slots 11 penetrate the upper and lower surfaces of the scale 1, and a sliding nut 7 is slidably connected inside the through slots 11. The sliding nut 7 also slides along the length direction of the scale 1. The first positioning block 2 and the second positioning block 3 are locked and connected to the sliding nut 7 through connecting bolts 8. Specifically, at least two connecting bolts 8 are provided for each positioning block to make the connection more stable.

[0024] To ensure the convenient sliding of the positioning blocks on the scale 1, a chute 12 is provided on the upper surface of the scale 1, and convex ribs 9 matching the chute 12 are provided on the lower surfaces of the first positioning block 2 and the second positioning block 3. The depth of the chute 12 is equal to the protruding thickness of the convex ribs 9, and the width of the chute 12 is 1-2 mm larger than the width of the convex ribs 9, so as to facilitate the smooth sliding of the convex ribs 9 in the chute 12.

[0025] A pair of connection holes 13 are also penetrated through the middle of the scale 1, which are used to facilitate the connection between the scale 1 and the bottom plate of the first drill base 10 or the second drill base 20 through bolts.

[0026] Scale lines are evenly provided along the length direction on the side of the scale 1, and scale values are marked on the scale lines, so as to facilitate the user to adjust the sliding distance of the positioning blocks according to the scale lines, provide numerical indication for the correct installation position of the positioning blocks, quickly position by sliding the positioning blocks to the designated position on the scale, and adjust the central axis of the forging to be basically coincident with the central axis of the drill.

[0027] The first positioning block 2 is of a special-shaped structure, and the second positioning block 3 is of a Z-shaped structure. The special-shaped first positioning block 2 has a vertical surface and an inclined surface 21. The vertical surface contacts the vertical part of the second positioning block 3, and the inclined surface 21 forms an angle with the vertical part. The bottom of the steam turbine blade forging is supported on the inclined surface 21, and its back is relied on the vertical part of the second positioning block 3.

[0028] The upper notch size of the through slot 11 is smaller than its lower notch size, and the width and thickness of the sliding nut 7 are consistent with the width and depth of the lower notch of the through slot 11. When the position of the positioning block on the scale 1 is adjusted, the loading position of the forging can be fixed by tightening the sliding nut 7, and the relative position can be readjusted after loosening.

[0029] A general drilling tool for steam turbine blade forgings, including the above-mentioned split root crown support base, further includes a first drilling tool base 10 and a second drilling tool base 20 that are slidably connected to each other, used to control the distance between the two scales 1 to meet the dimensional requirements of the blade forgings. The horizontal parts of the first drilling tool base 10 and the second drilling tool base 20 are stacked vertically, and the two horizontal parts slide through a slider rail. Both the first drilling tool base 10 and the second drilling tool base 20 are L-shaped. One scale 1 is directly mounted on the horizontal part of the first drilling tool base 10, and the other scale 1 is mounted on the horizontal part of the second drilling tool base 20 through a cushion block. A cushion block is also provided at the bottom of the first drilling tool base 10. The two cushion blocks are used to keep the two scales 1 at the same height. The vertical parts of the first drilling tool base 10 and the second drilling tool base 20 are the root drill template and the crown drill template of the steam turbine blade forgings respectively. Drill holes corresponding to the thimble holes required at the root and crown of the steam turbine blade forgings are provided on the root drill template and the crown drill template respectively.

[0030] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0031] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. Split root crown support seat for drill of steam turbine blade forging, characterized in that: It includes two scales (1), on which a first positioning block (2) and a second positioning block (3) are slidably connected. A tightening bolt one (4) parallel to the scale (1) is screwed at the front end of the first positioning block (2). A tightening bolt two (5) perpendicular to the scale (1) is screwed at the top of the second positioning block (3). And several tightening bolts three (6) parallel to the scale (1) are also screwed at the rear side of the second positioning block (3). A pair of through grooves (11) are symmetrically formed through both ends of the scale (1), and a sliding nut (7) is slidably connected inside the through groove (11). The first positioning block (2) and the second positioning block (3) are tightly connected to the sliding nut (7) through a connecting bolt (8).

2. The split root crown support seat of the drill for steam turbine blade forgings according to claim 1, characterized in that: The first positioning block (2) is of a special-shaped structure, and the second positioning block (3) is of a Z-shaped structure. The first positioning block (2) of the special-shaped structure has a vertical surface and an inclined surface (21). The vertical surface contacts the vertical part of the second positioning block (3), and the inclined surface (21) forms an angle with the vertical part. The bottom of the steam turbine blade forging is supported on the inclined surface (21), and its back leans against the vertical part of the second positioning block (3).

3. The split root crown support seat of the drill for steam turbine blade forgings according to claim 1, characterized in that: The middle of the first positioning block (2) is hollow.

4. The split root crown support seat of the drilling tool for steam turbine blade forgings according to claim 1, characterized in that: A chute (12) is formed on the upper surface of the scale (1), and convex ribs (9) matching the chute (12) are provided on the lower surfaces of the first positioning block (2) and the second positioning block (3).

5. The split root crown support seat of the drilling tool for steam turbine blade forgings according to claim 1, characterized in that: A pair of connection holes (13) are also formed through the middle of the scale (1).

6. The split root crown support seat of the drill for steam turbine blade forgings according to claim 1, characterized in that: Scale lines are evenly arranged along the length direction on the side of the scale (1).

7. The split root and crown support seat of the drilling tool for steam turbine blade forgings according to claim 2, characterized in that: The angle between the inclined surface (21) and the vertical part of the second positioning block (3) is 60°.

8. The split root crown support seat of the drill for steam turbine blade forgings according to claim 1, characterized in that: The upper notch size of the through groove (11) is smaller than its lower notch size, and the sliding nut (7) is matched with the lower notch of the through groove (11).

9. The split root crown support seat of the drilling tool for steam turbine blade forgings according to claim 1, characterized in that: Five tightening bolts three (6) are provided, and the tightening bolts three (6) are equidistantly distributed along the vertical direction of the second positioning block (3).

10. A general drill for steam turbine blade forgings, characterized in that: It includes the split root and crown support seat described in claim 1, and further includes a first drill base (10) and a second drill base (20) that are slidably connected to each other. The horizontal parts of the first drill base (10) and the second drill base (20) are stacked vertically, and the two horizontal parts slide through a slider rail. Both the first drill base (10) and the second drill base (20) are L-shaped. One scale (1) is directly placed on the horizontal part of the first drill base (10), and the other scale (1) is placed on the horizontal part of the second drill base (20) through a cushion block. A cushion block is also provided at the bottom of the first drill base (10). The two cushion blocks are used to keep the two scales (1) at the same height; The vertical parts of the first drill base (10) and the second drill base (20) are a blade root drill template and a blade crown drill template respectively. Drill holes corresponding to the thimble holes required to be drilled at the blade root and blade crown of the steam turbine blade forging are provided on the blade root drill template and the blade crown drill template respectively.

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