CN107639544B - Cooling structure device for grinding straight surface of blade root intermediate body of tenon tooth blade - Google Patents
Cooling structure device for grinding straight surface of blade root intermediate body of tenon tooth blade Download PDFInfo
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- CN107639544B CN107639544B CN201710947215.8A CN201710947215A CN107639544B CN 107639544 B CN107639544 B CN 107639544B CN 201710947215 A CN201710947215 A CN 201710947215A CN 107639544 B CN107639544 B CN 107639544B
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Abstract
The invention provides a cooling structure device for grinding the straight surface of the intermediate of a blade root of a tenon tooth blade, which can solve the problem of burn caused by grinding the straight surface of the intermediate of the blade root of the existing tenon tooth. The grinding fixture comprises an intermediate positioning block of the existing grinding fixture, wherein the intermediate positioning block comprises a positioning base and a cover plate which are obtained by cutting the middle part of the top surface of the intermediate positioning block; the middle part of the positioning base is provided with a horizontal through hole along the length direction, and the positioning base above the horizontal through hole is provided with a plurality of vertical through holes vertically communicated with the horizontal through hole along the length direction; the edge of the top surface of the positioning base positioned at the outer side of the cover plate is provided with first jet openings which are opposite to the vertical through holes one by one, and the first jet openings are obliquely communicated with the middle parts of the corresponding vertical through holes; blind holes which are opposite to the vertical through holes one by one are formed in the bottom surface of the cover plate, the diameter of each blind hole is larger than that of each vertical through hole, second jet ports which are opposite to the blind holes one by one are formed in the edge of the top surface of the cover plate, and the second jet ports are obliquely communicated with the middle parts of the corresponding blind holes.
Description
Technical Field
The invention relates to the field of turbine blade root grinding tools, in particular to a cooling structure device for grinding straight surfaces of blade root intermediates of tenon tooth blades.
Background
With the continuous progress of blade design and the requirement of high-power units, the straight surface M of the intermediate body of the blade root 2 of the tenon tooth blade 1 is designed to be longer and longer, and the length design of the straight surface M of the intermediate body of some large blades abroad even reaches 45mm, as shown in fig. 1 and 2. When the blade root of the tenon tooth blade is machined in a grinding mode, the blade is clamped and fixed by using a grinding clamp shown in fig. 1-3, wherein the blade crown 3 of the blade is tightly jacked by using the center 4, the clamp at the blade root 2 comprises supporting blocks 5, side positioning blocks 6, intermediate positioning blocks 7 and compacting blocks 8 at two sides, and schematic diagrams of the intermediate positioning blocks 7 are shown in fig. 4-6. After clamping and fixing the blade, the intermediate straight surface M is ground by means of a grinding wheel 9, see fig. 2 and 3. Since the front end face of the grinding wheel 9 is in surface-to-surface contact with the intermediate straight face M, the machine tool cooling device 10 located on the side face of the grinding wheel 9 cannot deliver cooling liquid to the grinding area, see fig. 7, and the surface is extremely prone to burn. The burn can cause the phenomena of cracks, tissue structure change, high hardness of the grinding surface and the like on the grinding surface of the product, and the product can not pass the subsequent flaw detection process and can only be scrapped; even if the burn trace generated in the grinding process is polished, the surface is temporarily invisible, and the shot blasting cannot be performed in the follow-up blade root shot blasting process because the grinding surface hardness is high, so that bright spots appear at the burn position and the problem is exposed again; the grinding burn trace can also cause the out-of-tolerance profile of the blade root, and the blade is directly scrapped due to the size.
For a long time, the problems of strong grinding and burn of the tenon tooth blade root are mainly solved by the following methods:
1. adjusting the angle of the nozzle;
2. increasing the pressure of the cooling system;
3. changing the model of the grinding wheel;
4. the number of nozzles is increased.
However, after the above methods are implemented, the burn problem cannot be completely solved, that is, only a mode of changing the grinding parameters and slowing down the grinding rhythm can be adopted, but the grinding efficiency is greatly reduced.
In summary, the problem of intermediate straight grinding burns of the blade root of the tooth has been a major problem for the intensive grinding process and has not been a satisfactory solution for a long time.
Disclosure of Invention
The invention provides a cooling structure device for grinding the straight surface of the blade root intermediate of a tenon blade, which can solve the problem of burn caused by grinding the straight surface of the intermediate of the blade root of the existing tenon blade, thereby ensuring the grinding quality of the straight surface of the blade root intermediate of the tenon blade.
The technical scheme is as follows: a cooling structure device for grinding of tenon tooth blade root midbody straight face, its midbody locating piece that includes current grinding anchor clamps, its characterized in that: the middle body positioning block comprises a positioning base and a cover plate, wherein the positioning base and the cover plate are obtained after the middle part of the top surface of the middle body positioning block is cut, and the cover plate covers the positioning base and is detachably connected with the positioning base; the middle part of the positioning base is provided with a horizontal through hole along the length direction, and the positioning base above the horizontal through hole is provided with a plurality of vertical through holes vertically communicated with the horizontal through hole along the length direction; the edge of the top surface of the positioning base positioned at the outer side of the cover plate is provided with first jet ports which are opposite to the vertical through holes one by one, and the first jet ports are obliquely communicated with the middle parts of the corresponding vertical through holes; the blind holes which are opposite to the vertical through holes one by one are formed in the bottom surface of the cover plate, the diameter of each blind hole is larger than that of each vertical through hole, second jet ports which are opposite to the blind holes one by one are formed in the edge of the top surface of the cover plate, and the second jet ports are obliquely communicated with the middle parts of the corresponding blind holes.
It is further characterized by:
the first jet orifice and the second jet orifice are kidney-shaped grooves.
The lengths of the first jet orifice and the second jet orifice are equal to the diameter of the vertical through hole.
The first and second jet ports have a width of 1.5mm.
And internal threads are machined at two ends of the horizontal through hole.
And an internal thread is processed at the upper end of the vertical through hole opposite to the first jet orifice.
The cover plate is provided with a plurality of counter bores along the length direction of the cover plate, the positioning base is provided with threaded holes which are opposite to the counter bores one by one, and the cover plate is fixedly connected to the positioning base through screws arranged in the counter bores and the threaded holes.
The beneficial effects of the invention are as follows:
1. according to the cooling structure device, by utilizing the installation position advantages of the intermediate positioning block on the existing grinding fixture, the horizontal through hole and the vertical through hole for conveying the cooling liquid, the first jet opening and the second jet opening for jetting the cooling liquid are processed on the existing intermediate positioning block, and the cooling liquid can be jetted obliquely through the first jet opening and the second jet opening, so that the cooling liquid can smoothly reach the cooling dead angle positions of the straight surface of the intermediate and the front end surface of the grinding wheel, the problem of easy burn of the area is effectively solved, the grinding efficiency of the blade root of the tenon tooth is improved by greatly improving the cooling effect of the area, the production bottleneck problem of the procedure is relieved, and the processing cost of the blade is reduced by improving the effect;
2. the jet orifice is designed into a kidney-shaped groove structure, so that a larger jet area and higher jet pressure can be obtained, and the cooling effect is further improved;
3. the cooling structure device disclosed by the invention is used for structurally modifying the existing intermediate positioning block, so that the processing and the manufacturing are easy, and the cost of the device is effectively saved.
Drawings
FIG. 1 is a schematic view of a structure for clamping a dovetail blade using a conventional grinding jig;
FIG. 2 is a left side view of FIG. 1 (with a grinding wheel);
FIG. 3 is a left side view of FIG. 2;
FIG. 4 is a front view of a prior art intermediate positioning block;
FIG. 5 is a top view of FIG. 4;
FIG. 6 is a left side view of FIG. 4;
FIG. 7 is a schematic view of a prior art grinding and cooling process;
FIG. 8 is a front view of the cover plate of the present invention;
FIG. 9 is a top view of FIG. 8;
FIG. 10 is a cross-sectional view taken along line A-A of FIG. 9;
FIG. 11 is a top view of the positioning base of the present invention;
FIG. 12 is a cross-sectional view taken along line B-B of FIG. 11;
FIG. 13 is a cross-sectional view taken along line C-C of FIG. 11;
FIG. 14 is a schematic view of the device of the present invention in use;
FIG. 15 is a cross-sectional view taken along line D-D of FIG. 14;
fig. 16 is a sectional view taken along line E-E of fig. 14.
Reference numerals: 20-positioning a base; 21-a threaded hole; 22-horizontal through holes; 23-vertical through holes; 24-a first injection port; 30-cover plate; 31-counter bore; 32-blind holes; 33-a second injection port; 40-screw.
Detailed Description
Referring to fig. 8-16, the cooling structure device for grinding the straight surface of the intermediate body of the blade root of the tenon tooth blade comprises an intermediate body positioning block of the existing grinding fixture, wherein a non-positioning area of the intermediate body positioning block, namely, the middle area of the top surface of the intermediate body positioning block is cut into a piece, the piece is divided into a positioning base 20 at the bottom and a cut cover plate 30, the cover plate 30 covers the positioning base 20, a plurality of counter bores 31 are formed in the cover plate 30 along the length direction of the cover plate 30, threaded holes 21 which are opposite to the counter bores 31 one by one are formed in the positioning base 20, and the cover plate 30 is fixedly connected to the positioning base 20 through screws 40 arranged in the counter bores 31 and the threaded holes 21; the middle part of the positioning base 20 is provided with a horizontal through hole 22 along the length direction (when in use, one end of the horizontal through hole is communicated with a delivery pipe of the cooling liquid, the other end is closed, a plurality of vertical through holes 23 which are vertically communicated with the horizontal through hole 22 are arranged on the positioning base 20 above the horizontal through hole 22 along the length direction, and the number and the distribution of the vertical through holes are designed according to the cooling requirement; the edge of the top surface of the positioning base 20 positioned outside the cover plate 30 is provided with first jet ports 24 which are opposite to the vertical through holes 23 one by one, and the first jet ports 24 are obliquely communicated with the middle parts of the corresponding vertical through holes 23 (when in use, the upper end of the vertical through hole opposite to the first jet port is closed); blind holes 32 which are opposite to the vertical through holes 23 one by one are formed in the bottom surface of the cover plate 30, the diameter of each blind hole 32 is larger than that of each vertical through hole 23, second jet openings 33 which are opposite to the blind holes 32 one by one are formed in the edge of the top surface of the cover plate 30, and the second jet openings 33 are obliquely communicated with the middle parts of the corresponding blind holes 32.
Referring to fig. 9 and 11, the first injection port 24 and the second injection port 33 are each kidney-shaped grooves, the lengths of the first injection port 24 and the second injection port 33 are equal to the diameter of the vertical through hole 23, and the widths of the first injection port 24 and the second injection port 33 are 1.5mm. By such design, a larger injection area and a higher injection pressure can be obtained.
Referring to fig. 13, both ends of the horizontal through hole 22 are provided with female screws, and the upper end of the vertical through hole 23 facing the first injection port 24 is provided with female screws. So designed, the hole is closed when being used conveniently.
Claims (7)
1. A cooling structure device for grinding of tenon tooth blade root midbody straight face, its midbody locating piece that includes current grinding anchor clamps, its characterized in that: the middle body positioning block comprises a positioning base and a cover plate, wherein the positioning base and the cover plate are obtained after the middle part of the top surface of the middle body positioning block is cut, and the cover plate covers the positioning base and is detachably connected with the positioning base; the middle part of the positioning base is provided with a horizontal through hole along the length direction, and the positioning base above the horizontal through hole is provided with a plurality of vertical through holes vertically communicated with the horizontal through hole along the length direction; the edge of the top surface of the positioning base positioned at the outer side of the cover plate is provided with first jet ports which are opposite to the vertical through holes one by one, and the first jet ports are obliquely communicated with the middle parts of the corresponding vertical through holes; the blind holes which are opposite to the vertical through holes one by one are formed in the bottom surface of the cover plate, the diameter of each blind hole is larger than that of each vertical through hole, second jet ports which are opposite to the blind holes one by one are formed in the edge of the top surface of the cover plate, and the second jet ports are obliquely communicated with the middle parts of the corresponding blind holes.
2. A cooling structure apparatus for grinding straight surfaces of blade root intermediates of a dovetail blade according to claim 1, wherein: the first jet orifice and the second jet orifice are kidney-shaped grooves.
3. A cooling structure apparatus for grinding straight surfaces of blade root intermediates of a dovetail blade according to claim 2, wherein: the lengths of the first jet orifice and the second jet orifice are equal to the diameter of the vertical through hole.
4. A cooling structure apparatus for grinding straight surfaces of blade root intermediates of a dovetail blade according to claim 3, wherein: the first and second jet ports have a width of 1.5mm.
5. The cooling structure device for grinding straight surfaces of blade root intermediates of a tenon tooth blade according to any one of claims 1-4, wherein: and internal threads are machined at two ends of the horizontal through hole.
6. A cooling structure apparatus for grinding straight surfaces of blade root intermediates of a dovetail blade according to claim 5, wherein: and an internal thread is processed at the upper end of the vertical through hole opposite to the first jet orifice.
7. A cooling structure apparatus for grinding straight surfaces of blade root intermediates of a dovetail blade according to claim 6, wherein: the cover plate is provided with a plurality of counter bores along the length direction of the cover plate, the positioning base is provided with threaded holes which are opposite to the counter bores one by one, and the cover plate is fixedly connected to the positioning base through screws arranged in the counter bores and the threaded holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710947215.8A CN107639544B (en) | 2017-10-12 | 2017-10-12 | Cooling structure device for grinding straight surface of blade root intermediate body of tenon tooth blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710947215.8A CN107639544B (en) | 2017-10-12 | 2017-10-12 | Cooling structure device for grinding straight surface of blade root intermediate body of tenon tooth blade |
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| Publication Number | Publication Date |
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| CN107639544A CN107639544A (en) | 2018-01-30 |
| CN107639544B true CN107639544B (en) | 2023-05-23 |
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| CN201710947215.8A Active CN107639544B (en) | 2017-10-12 | 2017-10-12 | Cooling structure device for grinding straight surface of blade root intermediate body of tenon tooth blade |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003275958A (en) * | 2002-03-22 | 2003-09-30 | Toyoda Mach Works Ltd | Grinding fluid feeding method and device |
| CN1571909A (en) * | 2001-10-17 | 2005-01-26 | 沃斯特-阿尔派因工业设备制造股份有限公司 | Cooling plate with reinforcement |
| CN103350358A (en) * | 2013-07-29 | 2013-10-16 | 四川省自贡市海川实业有限公司 | Blade tenon tooth milling clamp |
| CN205927972U (en) * | 2016-08-29 | 2017-02-08 | 中航动力股份有限公司 | Fan big blades profile mills quick resilient mounting positioner |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3022391B2 (en) * | 1997-04-02 | 2000-03-21 | ショーボンド建設株式会社 | Dust absorption type grinding machine |
| JPH10296633A (en) * | 1997-04-30 | 1998-11-10 | Nissan Motor Co Ltd | Grinding fluid supply device for grinder |
| CN101758420B (en) * | 2008-12-08 | 2016-04-20 | 香港科技大学 | A kind of system, device and method that cooling is provided |
| CN202479860U (en) * | 2012-01-29 | 2012-10-10 | 无锡透平叶片有限公司 | Blade locating clamping device for tenon tooth blade root processing |
| CN102699462B (en) * | 2012-06-06 | 2013-11-20 | 江南大学 | Working solution variable fluidic device adopting high-speed electric spark line cutting |
| CN105538096B (en) * | 2015-12-10 | 2018-11-27 | 中国南方航空工业(集团)有限公司 | Blade tenon clamp |
| CN207309731U (en) * | 2017-10-12 | 2018-05-04 | 无锡透平叶片有限公司 | A kind of cooling structure device for facing grinding directly for tenon tooth blade blade root intermediate |
-
2017
- 2017-10-12 CN CN201710947215.8A patent/CN107639544B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1571909A (en) * | 2001-10-17 | 2005-01-26 | 沃斯特-阿尔派因工业设备制造股份有限公司 | Cooling plate with reinforcement |
| JP2003275958A (en) * | 2002-03-22 | 2003-09-30 | Toyoda Mach Works Ltd | Grinding fluid feeding method and device |
| CN103350358A (en) * | 2013-07-29 | 2013-10-16 | 四川省自贡市海川实业有限公司 | Blade tenon tooth milling clamp |
| CN205927972U (en) * | 2016-08-29 | 2017-02-08 | 中航动力股份有限公司 | Fan big blades profile mills quick resilient mounting positioner |
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