Split root crown support seat for drill tool of steam turbine blade forging

Abstract

The present invention discloses a split root crown support seat for a steam turbine blade forging drill, comprising a scale, a positioning block 1 and a positioning block 2. The positioning block 1 and the positioning block 2 are both slidably connected to the scale. The front end of the positioning block 1 is threadedly connected to a tightening bolt 1 parallel to the scale, the top end of the positioning block 2 is threadedly connected to a tightening bolt 2 perpendicular to the scale, and the rear side of the positioning block 2 is also threadedly connected to a plurality of tightening bolts 3 parallel to the scale. A pair of through slots are symmetrically provided at both ends of the ruler, and sliding nuts are slidably connected inside the through slots. The positioning block 1 and the positioning block 2 are locked with the sliding nuts by connecting bolts. The parts of the blade root and blade crown support seats designed by the present invention are universal, and there is no need to redesign and remanufacture each product, which shortens the manufacturing cycle of the drilling tool and does not require the manufacture of blade root drilling templates and blade crown drilling templates for each product, saving material costs and machining costs, and achieving high production efficiency.

Description

Technical Field

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

[0002] In order to facilitate the subsequent processing of turbine die-forged blades from forgings to parts, it is necessary to find the center axis of the blade by drilling a center hole on the forging for subsequent processing. The drilling position is usually a single hole at the crown end and three holes at the root end. This hole is called a thimble hole in the industry.

[0003] At present, when drilling, the blade forging needs to be fixed in the drill tool through a support seat. The forging support seat in the existing forging blade drilling tool is designed to make the positions of the holes required for the blade root and blade crown of the forging to be placed correspond to the holes drilled on the blade root drilling template and blade crown drilling template of the drilling tool. A forging support seat corresponding to it is designed separately for each forging. In this way, after the forging is placed, the positions of the holes required for the blade root and blade crown of the forging to be drilled just correspond to the holes drilled on the blade root drilling template and blade crown drilling template of the drilling tool, so that drilling can be done quickly. Figure 1 As shown, the forging support seat includes a blade root support seat A and a blade crown support seat B. The blade root support seat A and the blade crown support seat B are both integrated and consistent with the outer contours of the corresponding forging blade root and blade crown respectively. Since a corresponding forging support seat needs to be made for each forging, there are problems such as complicated design, long manufacturing cycle, high manufacturing cost and low production efficiency.

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

[0005] The object of the present invention is to provide a split root-crown support seat for a steam turbine blade forging drill tool, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The top of the positioning block 2 is screwed on a tightening bolt 2 which is parallel to the scale, and the rear side of the positioning block 2 is also screwed on a plurality of tightening bolts 3 which are parallel to the scale. A pair of through-slots are symmetrically opened at both ends of the positioning block, and a sliding nut is slidably connected with the through-slots. The positioning block 1 and the positioning block 2 are locked with the sliding nuts by connecting bolts. The positioning block 1 is a special-shaped structure, and the positioning block 2 is a Z-shaped structure. The positioning block 1 of the special-shaped structure has a vertical surface and an oblique surface. The vertical surface contacts the vertical part of the positioning block 2, and the oblique surface forms an angle with the vertical part. The bottom of the turbine blade forging is supported on the oblique surface, and its back relies on the vertical part of the positioning block 2. The middle of the positioning block 1 is hollow.

[0008] In a further embodiment, a sliding groove is provided on the upper surface of the ruler, and ridges matching the sliding groove are provided on the lower surfaces of the positioning block 1 and the positioning block 2.

[0009] In a further embodiment, a pair of connection holes are further provided through the middle of the ruler.

[0010] In a further embodiment, the side of the ruler is evenly provided with scale marks along the length direction.

[0011] In a further embodiment, the angle between the beveled surface and the vertical portion of the second positioning block is 60°.

[0012] In a further embodiment, the size of the upper notch of the through slot is smaller than the size of the lower notch thereof, and the sliding nut and the lower notch of the through slot are matched with each other.

[0013] In a further embodiment, five tightening bolts three are provided, and the tightening bolts three are equidistantly distributed along the vertical direction of the positioning block two.

[0014] Another object of the present invention is to provide a universal drilling tool for turbine blade forgings, comprising a split root-crown support seat, and also comprising a drill tool base 1 and a drill tool base 2 that are slidably connected to each other, the transverse parts of the drill tool base 1 and the drill tool base 2 are stacked up and down, and the two transverse parts slide between each other through a slider rail, the drill tool base 1 and the drill tool base 2 are both L-shaped, one of the rulers is directly mounted on the transverse part of the drill tool base 1, and the other ruler is mounted on the transverse part of the drill tool base 2 through a pad, and a pad is also provided at the bottom of the drill tool base 1, and the two pads are used to keep the two rulers at the same height, the vertical parts of the drill tool base 1 and the drill tool base 2 are respectively a blade root drilling template and a blade crown drilling template, and the blade root drilling template and the blade crown drilling template are respectively provided with drill holes corresponding to the pin holes required to be drilled at the blade root and blade crown of the turbine blade forging.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The root crown support seat in the present invention 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. Both the blade root support seat and the blade crown support seat are split. The root crown support seat is no longer customized, but can adapt to forgings of different specifications. It can ensure that after different forgings are placed, the positions of the holes required for drilling of the blade roots and blade crowns of the forgings can be adjusted. That is, the positions of the holes required for drilling of the blade roots and blade crowns of the forgings correspond to the holes drilled on the blade root drilling template and the blade crown drilling template of the drilling tool, respectively. Specifically:

[0017] By moving positioning block 1 and positioning block 2 to the specified position of the ruler, the positions of the holes required for the blade root and blade crown of the forging can be made to correspond closely to the holes drilled on the blade root drilling template and blade crown drilling template of the drilling tool respectively. Then, observing the data on the ruler, positioning block 1 can be further adjusted. Since the beveled surface of positioning block 1 supports the bottom of the forging, when positioning block 1 moves, the forging can be moved in the horizontal and vertical directions until the positions of the holes required for the blade root and blade crown of the forging completely correspond to the holes drilled on the blade root drilling template and blade crown drilling template of the drilling tool respectively.

[0018] 2. Short manufacturing cycle: The parts that make up the blade root and blade crown support seat are universal, and there is no need to redesign and remanufacture each product, which shortens the manufacturing cycle of the drilling tool.

[0019] 3. Low manufacturing cost: There is no need to manufacture blade root drilling templates and blade crown drilling templates for each product, saving material costs and machining costs.

[0020] 4. High production efficiency: After processing a product, simply loosen the connecting bolts, slide the positioning block to the next station, and then tighten the connecting bolts to quickly adjust the drill tool. The drill tool adjustment time is greatly shortened and the production efficiency is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the prior art;

[0022] Figure 2 This is a schematic diagram of the application state structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the top view of the scale structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the ruler of the present invention when viewed from above;

[0026] Figure 6This is a schematic diagram of the connection structure between the positioning block 1 and the sliding nut of the present invention.

[0027] Attachment Figure 2-6 The description is as follows: 1. Ruler; 11. Through groove; 12. Slide groove; 13. Connecting hole; 2. Positioning block 1; 21. Beveled surface; 3. Positioning block 2; 4. Tightening bolt 1; 5. Tightening bolt 2; 6. Tightening bolt 3; 7. Sliding nut; 8. Connecting bolt; 9. Raised ridge; 10. Drill base 1; 20. Drill base 2. DETAILED DESCRIPTION

[0028] In the description of the present invention, it should be understood that terms such as "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are used solely to facilitate and simplify the description of the present invention and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0029] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] See also Figure 2-6The split root crown support seat of the steam turbine blade forging drilling tool includes two rulers 1. Both rulers 1 are slidably connected with a positioning block 2 and a positioning block 2 3, which can slide along the length direction of the ruler 1. The front end of the positioning block 2 is threadedly connected with a tightening bolt 4 parallel to the ruler 1, which is used to tighten the front end face of the blade forging. The top of the positioning block 2 3 is threadedly connected with a tightening bolt 2 5 perpendicular to the ruler 1, which is used to tighten the upper edge of the blade forging, and the rear side of the positioning block 2 3 is also threadedly connected with a number of tightening bolts 3 6 parallel to the ruler 1. The tightening bolts 3 6 There are five of them, and the tightening bolts three 6 are equidistantly distributed along the vertical direction of the positioning block two 3, which are used to assist in locking the blade forging with an irregular surface on the rear side. A pair of through slots 11 are symmetrically opened at both ends of the scale 1. The through slots 11 pass through 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 positioning blocks one 2 and two 3 are locked with the sliding nuts 7 by connecting bolts 8. Specifically, each positioning block is provided with at least two connecting bolts 8 to make its connection more stable.

[0032] In order to ensure that the positioning block can slide easily on the ruler 1, a slide groove 12 is provided on the upper surface of the ruler 1, and the lower surfaces of the positioning block 1 2 and the positioning block 2 3 are provided with a ridge 9 matching the slide groove 12. The depth of the slide groove 12 is equal to the protruding thickness of the ridge 9, and the width of the slide groove 12 is 1-2 mm larger than the width of the ridge 9, so as to facilitate the ridge 9 to slide smoothly in the slide groove 12.

[0033] A pair of connection holes 13 are also provided through the middle of the ruler 1 for facilitating the connection between the ruler 1 and the bottom plate of the drill base 10 or the drill base 2 20 by bolts.

[0034] The side of the ruler 1 is evenly provided with scale lines along the length direction, and the scale values are marked on the scale lines, so that the user can adjust the sliding distance of the positioning block according to the scale lines, provide a numerical indication of the correct installation position of the positioning block, and quickly position the positioning block by sliding it to the position specified by the ruler, so that the center axis of the forging is basically aligned with the center axis of the drill bit.

[0035] Positioning block 1 2 is a special-shaped structure, and positioning block 2 3 is a Z-shaped structure. The special-shaped positioning block 1 2 has a vertical surface and a beveled surface 21. The vertical surface contacts the vertical part of positioning block 2 3, and the beveled surface 21 forms an angle with the vertical part. The bottom of the turbine blade forging is supported on the beveled surface 21, and its back rests on the vertical part of positioning block 2 3.

[0036] The size of the upper notch of the through slot 11 is smaller than that of the lower notch, 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. After adjusting the position of the positioning block on the scale 1, the insertion position of the forging can be fixed by tightening the sliding nut 7, and its relative position can be readjusted after loosening it.

[0037] A universal drilling tool for turbine blade forgings includes the above-mentioned split root-crown support seat, and also includes a drill tool base 10 and a drill tool base 20 that are slidably connected to each other to control the spacing between two rulers 1 to adapt to the size requirements of the blade forgings. The transverse parts of the drill tool base 10 and the drill tool base 20 are stacked up and down, and the two transverse parts slide between slide rails. The drill tool base 10 and the drill tool base 20 are both L-shaped, one of the rulers 1 is directly mounted on the transverse part of the drill tool base 10, and the other ruler 1 is mounted on the transverse part of the drill tool base 20 through a pad. A pad is also provided at the bottom of the drill tool base 10. The two pads are used to keep the two rulers 1 at the same height. The vertical parts of the drill tool base 10 and the drill tool base 2 20 are respectively a blade root drilling template and a blade crown drilling template. The blade root drilling template and the blade crown drilling template are respectively provided with drill holes corresponding to the pin holes required to be drilled at the blade root and blade crown of the turbine blade forging.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0039] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. The split root crown support seat of the steam turbine blade forging drilling tool is characterized by: The invention comprises two scales (1), wherein a positioning block 1 (2) and a positioning block 2 (3) are both slidably connected to the scales (1), the front end of the positioning block 1 (2) is threadedly connected to a tightening bolt 1 (4) parallel to the scale (1), the top end of the positioning block 2 (3) is threadedly connected to a tightening bolt 2 (5) perpendicular to the scale (1), and the rear side of the positioning block 2 (3) is also threadedly connected to a plurality of tightening bolts 3 (6) parallel to the scale (1), a pair of through slots (11) are symmetrically opened at both ends of the scale (1), and a sliding nut (7) is slidably connected inside the through slot (11), and the positioning block 1 (2) and the positioning block 2 (3) are locked and connected to the sliding nut (7) by a connecting bolt (8).

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

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

4. The split root-crown support seat for a steam turbine blade forging drill according to claim 1, characterized in that: The upper surface of the ruler (1) is provided with a slide groove (12), and the lower surfaces of the positioning block 1 (2) and the positioning block 2 (3) are both provided with ridges (9) matching the slide groove (12).

5. The split root-crown support seat for a steam turbine blade forging drill according to claim 1, characterized in that: A pair of connection holes (13) are also provided through the middle of the ruler (1).

6. The steam turbine blade forging drill split root crown support seat according to claim 1, characterized in that: The side of the ruler (1) is evenly provided with scale lines along the length direction.

7. The split root-crown support seat for a steam turbine blade forging drill according to claim 2, characterized in that: The angle between the beveled surface (21) and the vertical portion of the second positioning block (3) is 60°.

8. The split root-crown support seat for a steam turbine blade forging drill according to claim 1, characterized in that: The size of the upper notch of the through slot (11) is smaller than the size of the lower notch thereof, and the sliding nut (7) and the lower notch of the through slot (11) are matched with each other.

9. The steam turbine blade forging drill split root crown support seat according to claim 1, characterized in that: There are five tightening bolts three (6), and the tightening bolts three (6) are evenly distributed along the vertical direction of the positioning block two (3).

10. A universal drilling tool for steam turbine blade forgings, characterized by: The invention comprises the split root crown support seat as described in claim 1, and further comprises a drill base 1 (10) and a drill base 2 (20) which are slidably connected to each other, the transverse parts of the drill base 1 (10) and the drill base 2 (20) are stacked up and down, and the two transverse parts slide between each other through a slider rail, the drill base 1 (10) and the drill base 2 (20) are both L-shaped, one of the scales (1) is directly mounted on the transverse part of the drill base 1 (10), and the other scale (1) is mounted on the transverse part of the drill base 2 (20) through a pad, and a pad is also provided at the bottom of the drill base 1 (10), and the two pads are used to keep the two scales (1) at the same height; The vertical parts of the drill base 1 (10) and the drill base 2 (20) are respectively the blade root drilling template and the blade crown drilling template, and the blade root drilling template and the blade crown drilling template are respectively provided with drilling holes corresponding to the thimble holes required to be drilled at the blade root and the blade crown of the turbine blade forging.

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