EP2093019A2 - Procédé de ponçage proche du contour d'extrémité de contours arqués - Google Patents

Procédé de ponçage proche du contour d'extrémité de contours arqués Download PDF

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Publication number
EP2093019A2
EP2093019A2 EP09153433A EP09153433A EP2093019A2 EP 2093019 A2 EP2093019 A2 EP 2093019A2 EP 09153433 A EP09153433 A EP 09153433A EP 09153433 A EP09153433 A EP 09153433A EP 2093019 A2 EP2093019 A2 EP 2093019A2
Authority
EP
European Patent Office
Prior art keywords
contour
movement
deviations
path movement
path
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09153433A
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German (de)
English (en)
Inventor
Mark Geisel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MTU Aero Engines AG
Original Assignee
MTU Aero Engines GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MTU Aero Engines GmbH filed Critical MTU Aero Engines GmbH
Publication of EP2093019A2 publication Critical patent/EP2093019A2/fr
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/14—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding turbine blades, propeller blades or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/14—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the temperature during grinding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/16—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the load
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B51/00—Arrangements for automatic control of a series of individual steps in grinding a workpiece

Definitions

  • the invention relates to the field of machining of workpieces, in particular by CNC machine tools, and in particular by grinding machines. More specifically, it is a method of near-net-shape grinding arcuate contours, such as occur in the manufacture of engine blades and the like.
  • the grinding process is used to produce precisely shaped surfaces.
  • grinding processes belong to the processing methods with a geometrically indefinite cutting edge.
  • a release agent embedded in a binder sharp-edged grains of certain sizes are often used.
  • loose abrasives may also be used, which may be in liquid or pasty form and placed between the workpiece and a grinding wheel.
  • the processing takes place analogously under pressure and with repetitive, for example circular relative movements between the tool and the workpiece.
  • fresh abrasive for example by a central bore of the grinding tool, spent and enriched with abraded material abrasive is removed from the contact area of the tool.
  • arcuate contours such as turbine blades so-called “Vane” - or “Blade Crrinder” (blade blade grinder) are used. Since the control of such machine tools due to the complex geometries is not trivial, also appropriate programs (grinding operations, grinding cycles) are required, which must be provided by the machine manufacturers or independent suppliers or even be programmed by the user himself. In the case of curved contours, such control programs are also referred to as bow grinding operations. The achievable quality depends both on the precision of the machine tool and on the quality of the control software.
  • the object of the invention is therefore to provide a method for near net shape grinding of arcuate contours by means of 2D or 3D sheet grinding operations.
  • a compensated path movement of a tool of a CNC machine tool programmed deviating from a target contour so that the processing result after the end of the process to a high approximation reflects the target contour.
  • suitable compensation functions in particular interpolating and approximating cubic splines, are used so that a minimization of the shape error during bow grinding can be achieved.
  • the method of the present invention provides increased dimensional accuracy in performing both 2D and 3D sheet grinding operations as well as analog grinding operations.
  • the method therefore serves for near-net shape 2D and 3D grinding of arcuate contours and is characterized in that the path S movement of a CNC machine tool is programmed differently from a nominal contour K, so that the processing result after processing end to a high approximation, the target contour K reflects.
  • the arcuate contours may be, for example, the contours of engine blades, which are characterized in particular by a very high form fidelity or small deviations from a precisely determined desired shape.
  • CNC computer numerical controlled, computer-controlled
  • the method according to the invention serves to program a path movement deviating from a nominal contour K, which results in the almost complete cancellation of form deviations that would otherwise result from the application of a programming of the unchanged nominal contour when using this path movement.
  • the processing result reflects the target contour K after the end of the process to a high degree.
  • the required deviations ⁇ x of the movement sequence from the nominal contour K are determined by taking into account the force and / or temperature field acting during the machining.
  • numerical and / or analytical methods can be used.
  • Particularly preferred is the use of simulation models in which both the geometric data and the physical behavior of the workpiece during processing depending on relevant parameters such as temperature, pressure, material, etc. are stored.
  • Such models allow, in addition to the optimization of the web movement, also a check of, for example, analytically determined path movements, without the need for tedious and costly real experiments.
  • the required deviations S of the movement sequence from the nominal contour K are determined by testing. For this purpose, therefore, at least one real attempt is necessary in which the workpiece is first attempted to be finished with a path movement corresponding to the desired contour.
  • the resulting deviations ⁇ x can then be detected metrologically.
  • the detection can be carried out quasi-continuously (for example by means of a stylus method) or discretely (for example by means of touch probes), the latter variant being preferred, since a smaller amount of data must be recorded for this, which can sometimes lead to a considerable time advantage.
  • the scanning of complex curved surfaces, such as those with undercuts can be operated only with great time and metrological effort. In the case of individual discrete measuring points, however, care must be taken to ensure that the surface to be described can also be represented sufficiently accurately by the measuring points.
  • the path movement at time t thus corresponds to that path which the tool has to follow in order to compensate for the shape or measurement deviations ⁇ x and thus to achieve a contoured machining result.
  • the nominal contour K (t) is predetermined from the construction; the correction function may need to be determined otherwise or initially assumed to be constant.
  • the path movements S to be programmed be interpolated or approximated by a function S '.
  • this approximation is useful in the embodiment of the test, since under certain circumstances initially only a small number of measuring points (interpolation points) is available, but the path deviation S (t) to be programmed must be quasi-continuously available, in order to achieve this Due to the preference of recording only a small number of measuring points, which are available as support points for such interpolating or approximating functions S ', the approximation of the path movements S to be programmed is particularly preferred interpolating or approximating functions S 'used by a very small number of free parameters such as Support points are marked.
  • interpolation or approximation of the path movements S to be programmed are particularly preferably used, in particular interpolating or approximating spline functions S ', such as B-splines or most prefers cubic splines. Alternatively, however, higher-order polynomials, piecewise interpolations, etc. can also be used.
  • the calculations can be carried out particularly preferably by means of a commercially available PC.
  • For the detection of the measurement deviation .DELTA.x can also serve an automatic or semi-automatic method using a corresponding device; if necessary, the corresponding measuring points are to be specified manually beforehand, but they can also be carried out by means of an automated evaluation and planning software, which reads in the nominal contour and determines the optimum position of measuring points from it. The starting and measuring at these support points is then preferably again automatically.
  • all of the steps described in the previous paragraph are automated. This results in the shortest possible cycle time from the first calibration to the determination of the interpolating or approximating function S '. In addition, the result is reproducible in that the influence of possibly different operators is largely excluded.
  • FIG. 1 shows a flowchart of both variants of the method according to the invention.
  • a setpoint contour K (t) is predetermined, which corresponds to the desired workpiece shape after machining.
  • the physical behavior of the workpiece during processing is deposited by means of a corresponding model.
  • deviation .DELTA.x and setpoint contour K (t) essentially corresponds to the actual path movement S (t) to be programmed.
  • the tool then follows the path predetermined by the spline function S '(t).
  • the measurement deviation ⁇ x can be determined from the nominal value contour K (t). Preferably, as few discrete measuring points are approached, which are nevertheless sufficient to approximate the actual contour with sufficiently good agreement.
  • a correction function f (t) should still be known for which f (t) ⁇ 0 applies at all times.
  • the function f (t) can also be constant.
  • the tool then follows the path predetermined by the spline function S '(t).
  • FIG. 2 shows by way of example and simplifies the exemplary course of a nominal contour K, an actual contour I, and a path movement S.
  • contours are entered in an axbox, which is symbolized by the thin, mutually perpendicular lines.
  • the nominal contour K is a symmetrical to the Y-axis semicircle, which in the FIG. 2 is shown as a thick semi-circular line.
  • the actual contour I resulting from a first, non-optimized machining is to be recognized as a thick, dotted line deviating significantly from the nominal contour K.
  • the radius of the actual contour I is significantly greater than the radius of the nominal contour K. Between the two contours, therefore, there is a measuring distance ⁇ x, which is given here by way of example for a single location or production time t.
  • a web movement S (dashed thin line) can now be determined which, if it serves to control the tool instead of the desired contour, leads to the desired conformal production of the workpiece.
  • this path movement results by subtracting the measurement deviation ⁇ x from the nominal contour K, possibly with the aid of a correction function f (t), not shown here.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Numerical Control (AREA)
EP09153433A 2008-02-25 2009-02-23 Procédé de ponçage proche du contour d'extrémité de contours arqués Withdrawn EP2093019A2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008010982A DE102008010982A1 (de) 2008-02-25 2008-02-25 Verfahren zum endkonturnahen Schleifen bogenförmiger Konturen

Publications (1)

Publication Number Publication Date
EP2093019A2 true EP2093019A2 (fr) 2009-08-26

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EP09153433A Withdrawn EP2093019A2 (fr) 2008-02-25 2009-02-23 Procédé de ponçage proche du contour d'extrémité de contours arqués

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US (1) US20090215361A1 (fr)
EP (1) EP2093019A2 (fr)
DE (1) DE102008010982A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106383495A (zh) * 2016-09-12 2017-02-08 华南理工大学 基于非线性双闭环控制的曲面轮廓恒力跟踪方法及应用装置
CN113941905A (zh) * 2021-10-25 2022-01-18 湖南工学院 一种高效精密加工扬矿管道的误差与路径补偿方法
CN114004043A (zh) * 2021-11-11 2022-02-01 江苏苏鑫装饰(集团)公司 高端铝合金装饰型材模具型面数控加工光顺刀路生成方法
CN116900808A (zh) * 2023-09-14 2023-10-20 成都航空职业技术学院 一种航空发动机叶片数控铣销变形的误差补偿方法和系统
CN114004043B (zh) * 2021-11-11 2024-08-27 江苏苏鑫装饰(集团)公司 铝合金装饰型材模具型面数控加工光顺刀路生成方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113441598A (zh) * 2021-06-30 2021-09-28 武汉重型机床集团有限公司 一种旋压机高精度录返方法
CN114523341B (zh) * 2022-03-10 2022-12-13 西安交通大学 一种非球面圆弧包络磨削的对刀误差补偿方法及系统
CN115171820A (zh) * 2022-06-29 2022-10-11 成都飞机工业（集团）有限责任公司 一种空间连续多弯构件弯曲成形精确动态补偿方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5285572A (en) * 1992-08-12 1994-02-15 General Electric Company Method and system for machining contoured parts
US5917726A (en) * 1993-11-18 1999-06-29 Sensor Adaptive Machines, Inc. Intelligent machining and manufacturing
EP0751447B1 (fr) * 1995-06-26 2001-12-19 Siemens Aktiengesellschaft Méthode de commande numérique
US6242880B1 (en) * 1998-09-08 2001-06-05 Cimplus, Inc. Tolerance based motion control system
US6934601B2 (en) * 1999-09-20 2005-08-23 Hitachi, Ltd. Numerically controlled curved surface machining unit
US6782306B2 (en) * 1999-12-16 2004-08-24 Siemens Energy & Automation Motion control system and method utilizing spline interpolation
DE10144459A1 (de) * 2001-09-10 2003-04-03 Werner Kluft Überwachung von Werkzeugmaschinen-Komponenten mit einem Überwachungssystem
DE10157964B4 (de) * 2001-11-26 2011-06-22 Siemens AG, 80333 Verfahren zur Optimierung einer Oberflächengüte eines zu fertigenden Werkstücks anhand von CNC-Programmdaten
US7366583B2 (en) * 2005-09-01 2008-04-29 General Electric Company Methods and systems for fabricating components

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106383495A (zh) * 2016-09-12 2017-02-08 华南理工大学 基于非线性双闭环控制的曲面轮廓恒力跟踪方法及应用装置
CN106383495B (zh) * 2016-09-12 2019-10-18 华南理工大学 基于非线性双闭环控制的曲面轮廓恒力跟踪方法及应用装置
CN113941905A (zh) * 2021-10-25 2022-01-18 湖南工学院 一种高效精密加工扬矿管道的误差与路径补偿方法
CN114004043A (zh) * 2021-11-11 2022-02-01 江苏苏鑫装饰(集团)公司 高端铝合金装饰型材模具型面数控加工光顺刀路生成方法
CN114004043B (zh) * 2021-11-11 2024-08-27 江苏苏鑫装饰(集团)公司 铝合金装饰型材模具型面数控加工光顺刀路生成方法
CN116900808A (zh) * 2023-09-14 2023-10-20 成都航空职业技术学院 一种航空发动机叶片数控铣销变形的误差补偿方法和系统
CN116900808B (zh) * 2023-09-14 2023-12-26 成都航空职业技术学院 一种航空发动机叶片数控铣销变形的误差补偿方法和系统

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US20090215361A1 (en) 2009-08-27

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