公开(公告)号：US4291448A

公开(公告)日：1981-09-29

申请号：US029571

申请日：1979-04-12

Applicant: Salvatore J. Cretella ,  Matthew Bernardo ,  Ralph T. DeMusis

Inventor： Salvatore J. Cretella ,  Matthew Bernardo ,  Ralph T. DeMusis

IPC: B23P6/00 ,  F01D5/00 ,  B23P15/02 ,  B23P7/00

CPC classification number: B23P6/007 ,  F01D5/005 ,  Y10T29/49318 ,  Y10T29/49728 ,  Y10T29/49746 ,  Y10T29/49986

Abstract: A method of restoring the shroud of a turbine blade which has become worn, and particularly those edges of the shroud in the vicinity of what is commonly known as the Z-notch, which comprises the steps of grinding down the shroud in the vicinity of said notch to an accurately predetermined dimension with respect to the original geometry of the shroud, placing the blade in a fixture having a masking member with a slot in it, such that the Z-notch of the blade is disposed substantially in alignment with the slot, and depositing, by means of a plasma spray, a metal alloy onto those edges in an amount just sufficient to build up the same essentially to their original dimensions. Following the plasma spraying, the built-up edges are sintered at a temperature on the order of 1900.degree. F. or more, to more firmly bond the built-up layer to the base metal. The blade is then cooled. The resulting edges conform so closely to the original geometry of a new blade that no additional refinishing or grinding operations are normally required after the sintering.

Abstract translation: 一种恢复已经磨损的涡轮叶片的护罩的方法，特别是在通常称为Z形切口的附近的护罩的那些边缘，其包括以下步骤：在所述的切口附近研磨护罩 相对于护罩的原始几何形状准确地预定尺寸，将刀片放置在具有掩模构件的夹具中，其中具有狭槽，使得刀片的Z形凹口基本上与槽对齐， 以及通过等离子体喷涂将金属合金以足以使其基本上与其原始尺寸相同的量沉积到这些边缘上。 在等离子体喷涂之后，积层边缘在大约1900°F或更高的温度下烧结，以更牢固地将堆积层与基体金属结合。 然后将刀片冷却。 所得到的边缘与新刀片的原始几何形状紧密相符，烧结后通常不需要额外的修补或研磨操作。

公开(公告)号：US4128929A

公开(公告)日：1978-12-12

申请号：US777674

申请日：1977-03-15

Applicant: Ralph T. DeMusis

Inventor： Ralph T. DeMusis

IPC: B23P6/00 ,  B23P6/04 ,  F01D5/00 ,  B23P15/02 ,  B23P13/02

CPC classification number: B23P6/002 ,  F01D5/005 ,  Y10T29/49318 ,  Y10T29/49746

Abstract: The method of restoring the worn edge surfaces of the shroud portion of a turbine component, such as a blade of the type having a ribbed mounting base at one end, which involves the steps of applying welding material to the worn edges of the shroud portion so as to build up the same beyond the dimensions of the shroud of a new component, and thereafter clamping the blade by its base in a fixture having a reference surface with a fixed position-relationship with respect to one edge of the shroud of a new blade of the type being refurbished when said new blade is similarly clamped in the fixture, and grinding off the added or overlay metal from the one edge of the built-up shroud until such edge is restored and duplicates the fixed relationship with respect to the reference surface. Thereafter the blade is clamped in a second fixture which has a supporting surface so arranged as to back up the one restored edge and thereby accurately position the blade with respect to the fixture, and then a remaining one of the built-up edges is restored. Finally, the blade is clamped in a third fixture having multiple surfaces backing up respectively the one restored edge and the remaining restored edge, while a third edge of the shroud is resurfaced. The method is characterized by high accuracy and good repeatability; excellent uniformity between successive units being refurbished thereby results.

Abstract translation: 涡轮机部件的护罩部分的磨损的边缘表面的恢复方法，例如在一端具有肋状安装基座的类型的刀片，其包括将焊接材料施加到护罩部分的磨损边缘的步骤， 以便在新部件的护罩的尺寸之外建立相同的尺寸，然后通过其基部将刀片夹紧在具有与新刀片的护罩的一个边缘具有固定位置关系的基准表面的固定装置中 当所述新刀片被类似地夹紧在固定装置中时被翻新的类型，并且从组合护罩的一个边缘磨除添加的或覆盖的金属，直到这样的边缘被恢复并且相对于参考表面复制固定的关系 。 此后，将刀片夹紧在具有支撑表面的第二固定装置中，该支撑表面设置成支撑一个已恢复的边缘，从而相对于固定装置精确地定位刀片，然后恢复其余的一个积木边缘。 最后，刀片被夹紧在具有多个表面的第三夹具中，分别具有一个复原边缘和剩余的复原边缘，同时护罩的第三边缘重新表面。 该方法的特点是精度高，重复性好; 因此，连续的被翻新的单元之间具有良好的均匀性。

公开(公告)号：US4028788A

公开(公告)日：1977-06-14

申请号：US648388

申请日：1976-01-12

Applicant: Ralph T. DeMusis

Inventor： Ralph T. DeMusis

IPC: B23P6/00 ,  B23P15/04 ,  B24B21/00 ,  F01D5/00 ,  B23P15/02 ,  B23P7/00

CPC classification number: B24B21/165 ,  B23P15/04 ,  B23P6/007 ,  F01D5/005 ,  Y10T29/49318 ,  Y10T29/49719 ,  Y10T29/49746

Abstract: A method of refurbishing the air seal flanges of turbine blades which have become worn, comprising the steps of adding a bead of welding material to the opposite side portions and the edge portions of the flange so as to build up those areas which have been worn away, and thereafter removing controlled amounts of the built up areas so as to restore the piece to its original geometry. In the latter step, the blade is clamped in a first machine having a pair of abrasive belts and a pair of pivotally mounted pressure shoes engageable with the backs of the belts respectively, such that their abrasive surfaces can be brought into engagement with the opposite sides of the air seal flanges. Controlled quantities of the built-up flange can be removed, depending on the degree of advancement of the shoes. In another machine, the blade is placed on a slide which approaches an abrasive belt backed by a special curved contour shoe, whereby as the edge of the seal engages the abrasive surface of the belt, the latter yields an extent, conforming to the particular contour of the shoe. This has the effect of imparting a predetermined, desired profile to the flange. Following the welding and refinishing operations, the geometry and physical characteristics of the refurbished blade closely resemble those of a new blade. By the above method, considerably less expense is entailed over that involved with discarding the old blades and fabricating new ones.

Abstract translation: 一种翻新已经磨损的涡轮机叶片的空气密封凸缘的方法，包括以下步骤：将焊接材料珠加入凸缘的相对侧部和边缘部分，以便建立已经磨损的区域 ，然后去除受控量的建立区域，以便将片恢复到其原始几何形状。 在后一步骤中，叶片被夹紧在具有一对研磨带和一对可枢转地安装的压力靴的第一机器中，所述一对可枢转地安装的压力靴分别与带的后部接合，使得它们的研磨表面可以与相对侧接合 的气密法兰。 根据鞋子的进步程度，可以去除受控量的积木法兰。 在另一台机器中，刀片被放置在接近由特殊弯曲轮廓靴支撑的研磨带的滑块上，由此当密封件的边缘接合皮带的研磨表面时，其产生符合特定轮廓的程度 的鞋子。 这具有赋予凸缘预定的期望的轮廓的效果。 在焊接和修补操作之后，翻新刀片的几何形状和物理特性与新刀片的几何形状和物理特性非常相似。 通过上述方法，与丢弃旧刀片并制造新刀片相关的费用要低得多。

公开(公告)号：US4121894A

公开(公告)日：1978-10-24

申请号：US745165

申请日：1976-11-26

Applicant: Salvatore J. Cretella ,  Matthew Bernardo ,  Ralph T. DeMusis

Inventor： Salvatore J. Cretella ,  Matthew Bernardo ,  Ralph T. DeMusis

IPC: B23P6/00 ,  F01D5/00 ,  F01D5/28

CPC classification number: C22F1/10 ,  B23K10/027 ,  B23K31/02 ,  B23K35/0244 ,  B23K35/3046 ,  B23K35/3607 ,  B23P6/007 ,  F01D5/005 ,  F01D5/288 ,  B23K2201/001 ,  Y02T50/673 ,  Y10T29/49318 ,  Y10T29/49746

Abstract: A refurbished turbine vane or blade. Used turbine vanes and blades are cleaned, annealed and in some cases slotted adjacent their ends, after which any cooling passages are welded closed and all cracks welded over, on both leading and trailing edges. The trailing edge, for a vane or blade having a short chord, is built up by welding along its full length with an alloy wire, after which any slots that were cut adjacent the ends are closed, also by welding. Then the worn surfaces of the vane or blade are built-up by a plasma spray process, using a metal powder with added silica, to a thickness as great as 30 to 40 thousandths of an inch. The built-up vane or blade is then sintered and thereafter surface finished to conform to the original contour of the component when new. Any cooling holes are finally recut, and the vane or blade polished as required and inspected.

Abstract translation: 翻新的涡轮叶片或叶片。 使用的涡轮叶片和叶片被清洁，退火并且在某些情况下在其端部附近开槽，之后任何冷却通道被焊接封闭，并且所有裂纹焊接在前缘和后缘上。 用于具有短弦的叶片或叶片的后缘通过使用合金丝沿着其全长进行焊接来建立，之后通过焊接将所有切割的任何槽都封闭。 然后叶片或叶片的磨损表面通过等离子体喷涂工艺，使用添加有二氧化硅的金属粉末构成，厚度为30至40千分之一英寸。 然后将积木式叶片或叶片烧结，此后，当新的时候，表面加工完成以符合组件的原始轮廓。 任何冷却孔最后重新开始，叶片或叶片根据需要进行抛光和检查。

公开(公告)号：US3984212A

公开(公告)日：1976-10-05

申请号：US574563

申请日：1975-05-05

Applicant: Ralph T. DeMusis

Inventor： Ralph T. DeMusis

IPC: B24B21/00 ,  B24B21/06 ,  B24B21/16

CPC classification number: B24B21/165

Abstract: Disclosed is a machine for refinishing the side surfaces of air seal flanges which are located at the extremities of turbine blades and which have been resurfaced by welding. The machine comprises a pair of cutting belts arranged to have portions of their cutting surfaces juxtaposed and facing each other at a work-performing station, on a bench or table. The belts are power driven, and at the work-performing station pass between a pair of pivotally mounted pressure shoes which can be actuated by the machine operator to press against the back surfaces of the belts, so as to bring the belt cutting surfaces closer together. On the machine bench there is a movable slide, to which a turbine blade can be clamped in a manner to advance and place the built-up air seal flange thereof between the spaced-apart cutting belts at the work-performing station. A guide on the machine bench facilitates the positioning of the turbine blade seal between the belts. The pressure shoes are pivotally actuated by handles which are manipulated by the machine operator in a manner that the shoes can apply pressure to, and laterally shift the cutting belts against the opposite sides of the built-up air seal. This removes the excess metal from both sides of the seal simultaneously. Adjustable stops on the bench limit the extent of pivoting movement of the pressure shoes, and thus determine the amount of material which must be removed from the side surfaces of the seal flanges.

Abstract translation: 公开了一种用于补充位于涡轮机叶片末端并且已通过焊接而重新浮起的空气密封凸缘的侧表面的机器。 该机器包括一对切割带，其布置成使其切割表面的一部分在工作台上在工作台或桌子上并排并面对彼此。 皮带是动力驱动的，并且在工作台站之间穿过一对可枢转地安装的压力鞋，其可由机器操作者致动以压靠皮带的后表面，以使带切割表面更靠近在一起 。 在机台上有一个可移动的滑动件，涡轮叶片可以以这样一种方式被夹紧到该可移动的滑动件上，以便在工作执行工位上推进并将其中积累的空气密封凸缘放置在间隔开的切割带之间。 机台上的引导件有助于涡轮叶片密封件在带之间的定位。 压力鞋由机械操作者操纵的手柄枢轴致动，鞋子可以施加压力并使切割带横向移动抵靠组合空气密封件的相对侧。 这同时从密封件的两侧移除多余的金属。 台架上的可调节挡块限制了压力鞋的枢转运动的程度，从而确定了必须从密封凸缘的侧表面移除的材料的数量。

公开(公告)号：US4065879A

公开(公告)日：1978-01-03

申请号：US687396

申请日：1976-05-17

Applicant: Salvatore J. Cretella ,  Matthew Bernardo ,  Ralph T. DeMusis

Inventor： Salvatore J. Cretella ,  Matthew Bernardo ,  Ralph T. DeMusis

IPC: B24B21/00 ,  B24B21/02 ,  B24B19/14

CPC classification number: B24B21/165

Abstract: A machine for resurfacing the air-foil surfaces of turbine vanes and the like, comprising a base and a carriage movable over the base toward a work-performing station thereof. The base carries a power-driven abrasive belt which extends past the work-performing station, for engagement with the air-foil surface of the vane to be resurfaced. The latter is rotatably mounted on the carriage so as to be capable of turning during its engagement with the belt. The movement of the carriage over the base is governed by a cam and cam follower on the two parts, respectively, and a linkage is provided for effecting simultaneous synchronous turning of the cam and the vane. The arrangement is such that the position of the carriage with respect to the base is determined by the rotary position of the cam, and thus the contour of the latter affects the amount of resurfacing of the vane which occurs.

Abstract translation: 一种用于再现涡轮叶片等的空气箔表面的机器，包括基座和可移动到基座上的工作台的工作台的工作台。 基座上装有动力研磨带，该研磨带延伸经过工作台，用于与待重新表面的叶片的气翼表面接合。 后者可旋转地安装在滑架上，以便能够在与皮带接合期间转动。 托架在基座上的移动分别由两部分上的凸轮和凸轮从动件控制，并且提供连杆以实现凸轮和叶片的同时同步转动。 该布置使得滑架相对于底座的位置由凸轮的旋转位置确定，因此后者的轮廓影响发生的叶片的表面重叠量。

公开(公告)号：US4050133A

公开(公告)日：1977-09-27

申请号：US693640

申请日：1976-06-07

Applicant: Salvatore J. Cretella ,  Matthew Bernardo ,  Ralph T. DeMusis

Inventor： Salvatore J. Cretella ,  Matthew Bernardo ,  Ralph T. DeMusis

IPC: C22C19/05 ,  B05D1/10 ,  B23K9/04 ,  B23P6/00 ,  B23P15/04 ,  C23C4/04 ,  C23C4/08 ,  F01D5/00 ,  F01D5/28 ,  F01D9/02 ,  B23P7/00 ,  B23P15/02

CPC classification number: B23P6/007 ,  B23P15/04 ,  F01D5/005 ,  Y02T50/673 ,  Y10T29/4932 ,  Y10T29/49746 ,  Y10T29/4975 ,  Y10T29/49805

Abstract: A method for repairing turbine vanes and the like which have become worn or cracked after extended periods of use. The method embraces the steps of applying molten metal containing a predetermined quantity of silicon to the cracks, and overall to the worn or eroded areas of the vane to build up the same beyond its original surface, sintering the vane in a furnace at a temperature of over 2,000.degree. F thereby burning off some of the silicon, allowing the vane to cool, and thereafter placing it in a high pressure furnace and subjecting it simultaneously to heating to a temperature in excess of 2,000.degree. F and a pressure in excess of 15,000 PSI to drive the build-up material into all of the cracks of the vane and simultaneously effect a densification of the material as well as improving the bond to the original eroded surfaces. Thereafter the vane is removed and allowed to cool, and the built-up surface of the vane is ground down so as to restore the dimensions of the piece substantially to those of a new part.

Abstract translation: 一种在延长使用期后已经磨损或破裂的涡轮叶片等的修复方法。 该方法包括以下步骤：将含有预定量的硅的熔融金属施加到裂纹上，并且总体上将其施加到叶片的磨损或侵蚀区域以将其构造成超过其原始表面，在炉中在温度为 超过2000°F，从而烧掉一些硅，允许叶片冷却，然后将其放置在高压炉中并同时加热至超过2000°F的温度和超过15,000PSI的压力 以将积聚材料驱动到叶片的所有裂缝中，并同时影响材料的致密化以及改善与原始侵蚀表面的结合。 此后，将叶片取出并使其冷却，将叶片的组合表面磨平，从而将片的尺寸基本上恢复到新部件的尺寸。

公开(公告)号：US4155152A

公开(公告)日：1979-05-22

申请号：US859438

申请日：1977-12-12

Applicant: Salvatore J. Cretella ,  Matthew Bernardo ,  Ralph T. DeMusis

Inventor： Salvatore J. Cretella ,  Matthew Bernardo ,  Ralph T. DeMusis

IPC: F01D5/22 ,  B23K9/04 ,  B23P6/00 ,  F01D5/00 ,  B23P15/02 ,  B23P7/00

CPC classification number: B23P6/007 ,  F01D5/005 ,  Y02T50/671 ,  Y02T50/673 ,  Y10T29/49318 ,  Y10T29/49746 ,  Y10T29/49986

Abstract: A method of restoring the shroud of a turbine blade which has become worn, and particularly that edge of the shroud in the vicinity of what is commonly known as the Z-notch, which comprises the steps of grinding down the shroud in the vicinity of said notch to an accurately predetermined dimension with respect to the original geometry of the shroud, placing the blade in a fixture having a masking member with a slot in it, such that the Z-notch of the blade is disposed substantially in alignment with the slot, and depositing, by means of a plasma spray, a metal alloy onto the edge in an amount just sufficient to build up the same essentially to its original dimension. Following the plasma spraying, the built-up edge is sintered at a temperature on the order of 1900.degree. F. or more, to more firmly bond the built-up layer to the base metal. The blade is then cooled. The resulting edge conforms so closely to the original geometry of a new blade that no additional refinishing or grinding operations are normally required after the sintering.

Abstract translation: 一种恢复已经磨损的涡轮机叶片的护罩的方法，特别是在通常称为Z形切口的附近的护罩的边缘，其包括以下步骤：将所述护罩在所述 相对于护罩的原始几何形状准确地预定尺寸，将刀片放置在具有掩模构件的夹具中，其中具有狭槽，使得刀片的Z形凹口基本上与槽对齐， 以及通过等离子体喷射将金属合金以足以使其基本上与其原始尺寸相同的量沉积在边缘上。 在等离子体喷涂之后，积层边缘在大约1900°F或更高的温度下烧结，以将结合层更牢固地结合到母材上。 然后将刀片冷却。 所得到的边缘与新刀片的原始几何形状紧密相符，在烧结后通常不需要额外的修补或研磨操作。

公开(公告)号：US3988126A

公开(公告)日：1976-10-26

申请号：US528839

申请日：1974-12-02

Applicant: Ralph T. DeMusis

Inventor： Ralph T. DeMusis

IPC: B23Q35/10 ,  B24B21/00 ,  B24B17/02 ,  B24B19/14

CPC classification number: B24B21/165 ,  B23Q35/104

Abstract: A resurfacing machine and method for repairing turbine vanes and the like, the machine comprising a bed carrying a pair of supports which are capable of limited advancing and retracting movement with respect to one another. One of the supports is slidably carried on a pair of substantially parallel, coextensive guide bars mounted by the bed, and has a camming device engageable with a cam follower disposed on the other support. The latter is mounted for pivotal movement on the bed, and carries a motor driven sanding belt adapted to engage a workpiece clamped in place on a work-performing station of the first support. The movement of the first support is such that the workpiece is brought into engagement with the sanding belt as the support moves. Simultaneously, the cam follower is engaged by the cam, causing pivotal movement of the second support in such a way that the particular contour or shape of the cam is imparted to the workpiece. Means are provided for effecting automatic advancing and retracting movement of the first support on the bed, and for halting such movement when predetermined positions have been attained. Additional means are provided for adjusting the position of the cam with respect to the first support and workpiece, thus enabling variation in the degree of resurfacing of the particular vane being machined.

Abstract translation: 一种用于修复涡轮叶片等的表面修复机和方法，该机器包括承载一对支撑件的床，其能够相对于彼此限制前进和后退运动。 一个支撑件可滑动地携带在由床安装的一对基本上平行的共同延伸的导杆上，并且具有可与设置在另一支撑件上的凸轮从动件接合的凸轮装置。 后者安装成用于在床上的枢转运动，并且携带电动机驱动的砂带，适于将夹紧在第一支撑件的工作执行站上的工件接合。 第一支撑件的移动使得当支撑件移动时工件与砂带接合。 同时，凸轮从动件由凸轮接合，从而使得第二支撑件枢转运动，使得凸轮的特定轮廓或形状被赋予工件。 提供了用于实现第一支撑件在床上的自动前进和后退运动的装置，并且用于在已经达到预定位置时停止这种运动。 提供附加装置用于调节凸轮相对于第一支撑件和工件的位置，从而能够改变正被加工的特定叶片的表面重铺面。

公开(公告)号：US3969848A

公开(公告)日：1976-07-20

申请号：US574564

申请日：1975-05-05

Applicant: Ralph T. DeMusis

Inventor： Ralph T. DeMusis

IPC: B24B21/00 ,  B24B21/08

CPC classification number: B24B21/165

Abstract: A machine for refinishing edge portions of air seal flanges on the ends of turbine blades, comprising a bench or base, an abrasive belt carried by multiple pulleys mounted on the base, means for driving the belt, a contoured shoe carried by the base at a work-performing station thereon, and a slide movable over an upper surface of the base toward and away from the work-performing station, the slide being adapted to carry the turbine blade being refinished. Means are provided on the slide for releasably clamping the blade in a position such that the air seal flange thereof is movable toward and away from the cutting surface of the abrasive belt. The contoured shoe is disposed in a position wherein it backs up the belt at its point of contact with the air seal flange. In addition, adjustable stop means are provided on the base for limiting the advancing movement of the slide (and turbine blade) toward the belt, wherein the operator merely urges the slide slowly in one direction until the stop means become operative. Such an arrangement limits the amount of material which is ground from the air seal flange, and thus imparts a predetermined desired contour thereto. In addition, indicator means are provided, carried by the base, for enabling periodic measurements to be made of the remaining flange dimension. As a result, greatly improved resurfacing characteristics are realized, as well as a high degree of repeatability from one unit to another.

Abstract translation: 一种用于修补涡轮叶片端部上的空气密封凸缘的边缘部分的机器，包括台架或基座，由安装在基座上的多个滑轮承载的研磨带，用于驱动皮带的装置，由基座承载的成型鞋 工作台，以及可在基座的上表面上朝向和远离工作执行站移动的滑块，滑块适于承载被修补的涡轮叶片。 装置设置在滑动件上，用于可释放地将叶片夹紧在使得其空气密封凸缘能够朝向和远离砂带的切割表面移动的位置。 成型的鞋子被设置在其与背部的空气密封凸缘接触的位置。 此外，在底座上设置有可调节的止动装置，用于限制滑块（和涡轮叶片）朝向皮带的前进运动，其中操作者仅在一个方向上缓慢地推动滑动，直到止动装置变得可操作。 这种布置限制了从空气密封凸缘研磨的材料的量，从而赋予预定的期望轮廓。 另外，提供由基座承载的指示装置，以便能够对剩余的凸缘尺寸进行周期性的测量。 结果，实现了显着改善的表面重新特性，以及从一个单元到另一个单元的高度的重复性。