CN100593452C - High temperature insulation method of location pin inside cast fixture - Google Patents
High temperature insulation method of location pin inside cast fixture Download PDFInfo
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- CN100593452C CN100593452C CN200810177347A CN200810177347A CN100593452C CN 100593452 C CN100593452 C CN 100593452C CN 200810177347 A CN200810177347 A CN 200810177347A CN 200810177347 A CN200810177347 A CN 200810177347A CN 100593452 C CN100593452 C CN 100593452C
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- casting fixture
- blade
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Abstract
The invention relates to a heat resistance and insulation method for a positioning pin of a casting clamp for mechanically machining a precision forging blade of an aviatic military and a civil engineturbine and a pressure engine. The invention adopts a method of spraying oxide ceramics on the surface on which the positioning pin is contacted with a clamp substrate; after the clamp is heated, thepositioning pin has small heat expansion and insulation, thereby improving the positioning precision of a precise positioning clamp and ensuring the precision requirement of a cast alloy block benchmark with low melting point; the dimension precision between the clamp positioning and the alloy block benchmark can reach between negative 0.01mm and positive 0.01 mm; the oxide ceramics have the characteristics of good insulation, high-temperature resistance and high strength, can work at the temperature of about 180 DEG C; a substrate of the positioning pin does not deform in order that the situation of the positioning and contact of the blade and the positioning pin is clear and distinct in the operating process and the machining quality and the production efficiency of the blade are promoted; and the method improves the positioning precision of the blade in order that the positioning is more reliable and intuitional, reduces repairing and scrap of parts and improves production benefit.
Description
Technical field
The present invention relates to the military, civilian engine turbine of aviation and press steam turbine finish forge blade mechanism to process the method for alignment pin high temperature insulation in a kind of casting fixture of usefulness.
Background technology
Casting fixture is a crucial frock of setting up reliable benchmark for the follow-up machining integral shroud of no-residual length leaf and tenon.The blank blade that finish forge goes out does not have surplus, adopt precision positioning, make the datum level of the alignment pin that correctly contacts with 6 datum marks of blade and anchor clamps casting positioning chamber keep accurate requirement, to positioning chamber casting low-melting alloy, cooled alloy is solidified as one with blade and self, utilizes this regular alloy block to make benchmark then, divides the positions such as installation listrium, integral shroud, tenon of some operations processing blades again, after the assay was approved, melt low-melting alloy.Obviously, in the process of cast alloys piece, because of blade covers alignment pin, whether anchor point contacts with blade can not be directly perceived, so connect a holding wire for each anchor point of blade.The signal of six anchor points shows the location situation of blade.Alignment pin is except that with workpiece contacts, and itself and chuck body contact portion must insulate, so as not to short circuit current, the signal disorder.The precision positioning operation require the position dimension tolerance between each anchor point and the alloy block datum level be ± 0.03, so anchor clamps alignment pin and alloy block datum-plane position tolerance must be controlled at ± 0.01 scope in.Often occur overproof when the postorder blade processing and scrap, searching reason is the alignment pin generation play of casting type precision location clamp, is seriously restricting leaf quality and payment.Existing each alignment pin of anchor clamps blade is that employing method of socket insulation sleeve outside the alignment pin matrix insulate, and the used material of the insulation sleeve of alignment pin and clip base is a fabroil.Anchor clamps are heated with the casting time growth under the operating temperature more than 180 ℃, cause the insulation sleeve expanded by heating, and alignment pin position also changes thereupon, causes location dimension seriously overproof.
Summary of the invention
Goal of the invention of the present invention provides a kind of anchor clamps be heated after, the method for alignment pin high temperature insulation in a kind of casting fixture of the very little and insulation of alignment pin expanded by heating, technical solution of the present invention is:
1) alignment pin selects hot die steel to carry out initial manufacture, the plane of alignment pin and casting fixture matrix contact site is reduced direction processing to the alignment pin matrix, decrease 0.1～0.15mm, the outside diameter dimensioned that matches with hole on the casting fixture matrix is to less than required size 0.2～0.3mm, heat-treat the hardness number HRC55-60 after the heat treatment;
2) carry out surface treatment at the position that alignment pin contacts with the casting fixture matrix, carry out blasting treatment and clean out with 100～200 order quartz sands;
3) blasting treatment finished in 120 minutes, at sand blasted surface flame-spraying oxide ceramics, and 8000 ℃ of flame temperatures, the thickness of spray-on coating is 0.2～0.3mm;
4) fine finishining is carried out on the alignment pin surface that sprayed, with diamond-impregnated grinding wheel to the sprayed surface grinding, the emery wheel linear velocity 30m/s of grinding, the linear velocity 15m/min of alignment pin, lateral feed 0.01mm/dst, moving speed of table 0.0025mm/s, the alignment pin installing hole keeps gap 0.0015mm～0.0030mm on alignment pin and casting fixture matrix.
The matrix material of alignment pin is 5CrNiMo.Described oxide ceramics is-325 a purposes white alundum (Al.
Advantage that the present invention has and beneficial effect: the present invention adopts the method at alignment pin matrix surface spraying oxide ceramics, make after anchor clamps are heated, the alignment pin expanded by heating is very little, and insulation, thereby improved the positioning accuracy of precision location clamp, the low-melting alloy piece that can guarantee to cast (for follow-up mechanical processing and positioning with) required precision of benchmark, the anchor clamps location can reach ± 0.01mm with the dimensional accuracy of alloy block benchmark, by the oxide ceramics good insulation performance, high temperature resistant, high-intensity characteristic, under the temperature about 180 ℃, work, the alignment pin matrix is indeformable, make in operating process blade and alignment pin to contact situation clear, the efficient of processing of leaves quality and production is got a promotion, for good basis has been established in the payment on time of product.The blade that has solved the production scene is located an inaccurate difficult problem, improves the blade positioning accuracy, makes its location reliable more directly perceived, reduces reprocessing and scrapping of part, improves productivity effect.
Description of drawings
The schematic diagram of Fig. 1 alignment pin of the present invention.
The specific embodiment
1) alignment pin selects hot die steel to carry out initial manufacture, the plane of alignment pin and casting fixture matrix contact site is reduced direction processing to its matrix, decrease 0.1～0.15mm, the outside diameter dimensioned that matches with hole on the casting fixture matrix is to less than required size 0.2～0.3mm, heat-treat the hardness number HRC55-60 after the heat treatment;
2) carry out surface treatment at the position that alignment pin contacts with the casting fixture matrix, carry out blasting treatment and clean out with 100～200 order quartz sands;
3) blasting treatment finished in 120 minutes, at sand blasted surface flame-spraying oxide ceramics, and 8000 ℃ of flame temperatures, the thickness of spray-on coating is 0.2～0.3mm;
4) fine finishining is carried out on the alignment pin surface that sprayed, with diamond-impregnated grinding wheel to the sprayed surface grinding, the emery wheel linear velocity 30m/s of grinding, the linear velocity 15m/min of alignment pin, lateral feed 0.01mm/dst, moving speed of table 0.0025mm/s, the alignment pin installing hole keeps gap 0.0015mm～0.0030mm on alignment pin and casting fixture matrix.
The matrix material of alignment pin is 5CrNiMo.
Described oxide ceramics is-325 a purposes white alundum (Al.
The alignment pin insulation mode is, will be installed on the clip base 5 by position 2 on the alignment pin 1, and holding wire 4 is fixed between felt pad 3 and the nut 6.
Embodiment one
The preparation alignment pin, 1) alignment pin selects hot die steel 5CrNiMo to carry out initial manufacture, the plane of alignment pin and casting fixture matrix contact site is reduced direction processing to its matrix, decrease 0.1mm, the outside diameter dimensioned that matches with hole on the casting fixture matrix is to less than required size 0.2mm, heat-treat the hardness number HRC55-60 after the heat treatment;
2) carry out surface treatment at the position that alignment pin contacts with the casting fixture matrix, carry out blasting treatment and clean out with 100～200 order quartz sands;
3) blasting treatment finished in 120 minutes, and at sand blasted surface flame-spraying oxide ceramics, oxide ceramics is 8000 ℃ of-325 purposes white alundum (Al flame temperatures, and the thickness of spray-on coating is 0.2mm;
4) fine finishining is carried out on the alignment pin surface that sprayed, with diamond-impregnated grinding wheel to the sprayed surface grinding, the emery wheel linear velocity 30m/s of grinding, the linear velocity 15m/min of alignment pin, lateral feed 0.01mm/dst, moving speed of table 0.0025mm/s, the alignment pin installing hole keeps gap 0.0015mm～0.0030mm on alignment pin and casting fixture matrix.
Embodiment two
The preparation alignment pin, 1) alignment pin selects hot die steel 5CrNiMo to carry out initial manufacture, the plane of alignment pin and casting fixture matrix contact site is reduced direction processing to its matrix, decrease 0.15mm, the outside diameter dimensioned that matches with hole on the casting fixture matrix is to less than required size 0.3mm, heat-treat the hardness number HRC55-60 after the heat treatment;
2) carry out surface treatment at the position that alignment pin contacts with the casting fixture matrix, carry out blasting treatment and clean out with 100～200 order quartz sands;
3) blasting treatment finished in 120 minutes, and at sand blasted surface flame-spraying oxide ceramics, oxide ceramics is 8000 ℃ of-325 purposes white alundum (Al flame temperatures, and the thickness of spray-on coating is 0.3mm;
4) fine finishining is carried out on the alignment pin surface that sprayed, with diamond-impregnated grinding wheel to the sprayed surface grinding, the emery wheel linear velocity 30m/s of grinding, the linear velocity 15m/min of alignment pin, lateral feed 0.01mm/dst, moving speed of table 0.0025mm/s, the alignment pin installing hole keeps gap 0.0015mm～0.0030mm on alignment pin and casting fixture matrix.
Claims (3)
1. the method for alignment pin high temperature insulation in the casting fixture is characterized in that,
1) alignment pin selects hot die steel to carry out initial manufacture, the plane of alignment pin and casting fixture matrix contact site is reduced direction processing to the alignment pin matrix, decrease 0.1～0.15mm, the outside diameter dimensioned that matches with hole on the casting fixture matrix is to less than required size 0.2～0.3mm, heat-treat the hardness number HRC55-60 after the heat treatment;
2) carry out surface treatment at the position that alignment pin contacts with the casting fixture matrix, carry out blasting treatment and clean out with 100～200 order quartz sands;
3) blasting treatment finished in 120 minutes, at sand blasted surface flame-spraying oxide ceramics, and 8000 ℃ of flame temperatures, the thickness of spray-on coating is 0.2～0.3mm;
4) fine finishining is carried out on the alignment pin surface that sprayed, with diamond-impregnated grinding wheel to the sprayed surface grinding, the emery wheel linear velocity 30m/s of grinding, the linear velocity 15m/min of alignment pin, lateral feed 0.01mm/dst, moving speed of table 0.0025mm/s, the alignment pin installing hole keeps gap 0.0015mm～0.0030mm on alignment pin and casting fixture matrix.
2. the method for alignment pin high temperature insulation is characterized in that in a kind of casting fixture according to claim 1, and the matrix material of alignment pin is 5CrNiMo.
3. the method for alignment pin high temperature insulation is characterized in that in a kind of casting fixture according to claim 1, and described oxide ceramics is-325 a purposes white alundum (Al.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810177347A CN100593452C (en) | 2008-11-18 | 2008-11-18 | High temperature insulation method of location pin inside cast fixture |
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| CN200810177347A CN100593452C (en) | 2008-11-18 | 2008-11-18 | High temperature insulation method of location pin inside cast fixture |
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| CN101412181A CN101412181A (en) | 2009-04-22 |
| CN100593452C true CN100593452C (en) | 2010-03-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI560126B (en) * | 2014-11-17 | 2016-12-01 | Hon Hai Prec Ind Co Ltd | Positioning mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103203592A (en) * | 2012-12-20 | 2013-07-17 | 贵州黎阳航空动力有限公司 | Process method for improving rigidity of large titanium alloy ring groove thin-wall part |
| CN108517483A (en) * | 2018-04-23 | 2018-09-11 | 中国航发哈尔滨东安发动机有限公司 | A kind of method of tungsten carbide coating reparation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI560126B (en) * | 2014-11-17 | 2016-12-01 | Hon Hai Prec Ind Co Ltd | Positioning mechanism |
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Owner name: XIAN AVIATION POWER CO., LTD. Free format text: FORMER OWNER: XI'AN AERONAUSTIC ENGINE (GROUP) CO., LTD. Effective date: 20140528 |
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Effective date of registration: 20140528 Address after: Weiyang Xu Jia Wan 710021 Shaanxi city of Xi'an Province Patentee after: XI'AN AVIATION POWER Co.,Ltd. Address before: 710021 Beijiao, Shaanxi province Xu Bay Patentee before: Xi'an Aero-Engine(Group) Ltd. |
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Address after: Weiyang Xu Jia Wan 710021 Shaanxi city of Xi'an Province Patentee after: AECC AVIATION POWER CO,LTD. Address before: Weiyang Xu Jia Wan 710021 Shaanxi city of Xi'an Province Patentee before: AVIC AVIATION ENGINE Corp.,PLC Address after: Weiyang Xu Jia Wan 710021 Shaanxi city of Xi'an Province Patentee after: AVIC AVIATION ENGINE Corp.,PLC Address before: Weiyang Xu Jia Wan 710021 Shaanxi city of Xi'an Province Patentee before: XI'AN AVIATION POWER Co.,Ltd. |