• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a method for processing a blank in a processing machine, in particular milling machine. It is primarily characterized in that at least two processing units (1, 2, 3, 4) are provided which produce a non-symmetrical workpiece (5) with three-dimensional shape and offset-synchronously edit, in particular mill, wherein the processing units (1, 2 , 3, 4) are controlled together. The invention also relates to a processing machine for carrying out the method. As a result, the processing times can be greatly reduced.
    公开号:AT516093A1
    申请号:T602/2014
    申请日:2014-07-30
    公开日:2016-02-15
    发明作者:Josef Ing Krasser；Martin Ing Preitler-Höller；Maximilian Zach；Adolf Klambauer；Markus Dipl Ing Maier
    申请人:Andritz Ag Maschf；
    IPC主号:
    专利说明:

    The invention relates to a method for processing a blank in a processing machine, in particular a milling machine, and a processing machine for carrying out the method.
    When processing blanks, large volumes often have to be machined. This is especially true in the production of Pelton wheels from Schmiederohlingen. But other components such as turbine wheels, pump impellers or gears can be made from a forging blank by machining. The components can have a gross weight of up to 50 tons, of which up to two-thirds arise as chips. Such workpieces are produced today with large milling machines, wherein they are mounted on a machining table. During processing, the processing machine, for example, milling machine moves in two directions, i. substantially horizontally and vertically on the workpiece while the table is rotating radially. After completion of the processing on a Pelton cup, the workpiece is rotated by an angle, so that the processing can be started on the next Pelton cup.
    This often takes several weeks to complete before the workpiece is finished. When machining, a complex, three-dimensional free-form component geometry must be used, such as e.g. a Pelton mug is made out of the full material. In order to reduce the processing time and throughput time, one could easily use two or more processing units at the same time. However, this does not lead to success, since most workpieces are asymmetrical, i. an odd number of pelton cups, an odd number of teeth on the gear, an odd number of blades on a Francis turbine wheel, etc. Here, in opposing tools of, for example, two processing units, the tools are always at different positions of the component surface, e.g. positioned the Pelton cup, whereby a movement of the workpiece is not possible.
    The aim of the invention is now for a machining of blanks with a large cutting capacity to greatly reduce the processing time and processing time of the workpiece, while maintaining the surface quality.
    The invention is therefore characterized in that at least two processing units are provided which produce a non-symmetrical workpiece with three-dimensional shape and offset-synchronously edit, in particular mill, wherein the processing units are controlled together, with four processing units offset-synchronously can work on a workpiece , Due to the common control is always the respective position of the workpiece and tools known and the tools can be optimally controlled according to the design specifications, the positions of the tools on each component are at different locations.
    An advantageous development of the invention is characterized in that the machining units move or drive during machining in all spatial directions.
    This can be achieved with the tool every position on the blank / workpiece.
    A favorable embodiment of the invention is characterized in that the workpiece is arranged stationary and optionally further moved stepwise about an axis. By the stationary arrangement, the position of the workpiece is fixed during the machining, wherein the workpiece for a next processing step, i. Processing a new (Peltonbecher-) surface is rotated by an angle.
    The workpiece may be a Pelton impeller, a pump impeller or for example a gear. But other complex three-dimensional surfaces such as e.g. (Kaplan) turbine blades can be processed in a very short time, as always the exact position of the tools in relation to the workpiece is known. The Kaplanschaufeln can be rotatably clamped about a horizontal axis and processed from both sides on the surface simultaneously.
    The invention will now be described by way of example with reference to the drawings, in which Fig. 1 shows a variant of the invention with two processing units,
    2 shows a variant of the invention with four processing units,
    3 is a plan view of a processing step,
    4 is a side view of the processing step of FIG. 3,
    Fig. 5 is a plan view of another processing step and Fig. 6 is a side view of another processing step.
    In Fig. 1, a variant of a processing machine according to the invention with two processing units 1, 2 is shown. Here, these processing units are exemplified as traveling column machines. In principle, however, they can also be replaced by industrial robots with milling processing units. This is essentially dependent on the size of the workpiece and the material, which also results in the applied forces. In order to maintain the accuracy and also to achieve correspondingly high cutting speeds, traveling column machines are to be preferred for large workpieces.
    As an example of a workpiece 5, a large forging disc is shown here as a semi-finished product for a Pelton runner. But it could also be a large forged disc for a large gear or a large forging for a Francislaufrad. The tool carrier 6, 7 can each be moved in the tangential direction 10, 11 along the workpiece 5 and in the direction perpendicular thereto 12, 13 in the direction of the workpiece 5. However, the tool carrier 6, 7 is also movable in the vertical direction (i.e., out of the plane of the drawing). As a result, all degrees of freedom are spatially given and it can be set virtually any position of the tool. However, this is different for each tool.
    2, an arrangement of four processing units 1, 2, 3, 4 is shown. Each processing unit is assigned its own tool carrier 6, 7, 8, 9. The movement of the individual processing units, which are shown as traveling column machines, can take place in a practically tangential direction 10, 11, 14, 15 and in the direction 12, 13, 16, 17 into the workpiece. Of course, a vertical movement of all machining units and thus the corresponding tools can be done, with all movements can be performed independently. This allows all desired three-dimensional geometries to be worked out and their surfaces to be processed.
    The processing of a blank is now shown in more detail on the basis of a blank for a Pelton runner. In this case, in a first step, a pre-turning of the semifinished product for the outer shape, as well as the processing of various holes.
    In a further step, a large part of the material volume is removed. The milling head has an angular position of 90 °. In this machining step, milling is only performed on the upper workpiece half. The next step is milling with angled angle head position to work the inner cup contour as deeply as possible. Of course, this step takes place once for the upper half of the workpiece. This is followed by a turning of the workpiece and a repetition of the milling with angular head position 90 ° and subsequently with oblique angle head position for the not yet machined workpiece half. Subsequently, the finishing of the inside of the cup, the back of the cup and the cutting edge takes place.
    Fig. 3 shows a plan view in a horizontal processing. In this case, the processing unit 1 with the tool carrier (milling head) 6 is the main machine with which only all machining programs are tested. The angle of rotation α of the angle head (milling head) 6 of the processing unit 1 is essentially dependent on the diameter of the workpiece 5 and the tool accessibility of the component geometry. The angle β between the angle head (milling head) 6 of the processing unit 1 and the angle head (milling head) 7 of the processing unit 2 results from the total number of Peltonbecher to be produced and the number of odd cup rotation. This results in that the processing unit 1 always processes the even cup distributions and the processing unit 2 always the odd cup divisions. This division ensures that the two processing units never process one and the same distribution of cups. Have the two processing units 1, 2 completed the processing of such a pair of cups and are the angular heads 6.7 in a defined and collision-free with the workpiece position, the work table is further rotated by two cup angular pitches. So all cups are processed in turn. The machining by the two angular heads 6, 7 takes place offset synchronous, that is, both tools work synchronously with the same NC program, the processing start of the tool heads is, however, offset in time.
    In addition to the processing units 1, 2 and the angle heads (milling heads) 6, 7 can be seen here also the work table 18, which is designed as a rotary table and on which the workpiece 5 is clamped ,
    5 and 6 show a subsequent processing step with vertical machining. The processing units 1, 2 with the corresponding angular heads (milling heads) 6,7 are positioned here in height so that the angular heads (milling heads) 6, 7 can reach the full depth of the Pelton cups. In this way, the exact finishing of the inside of the cup, the back of the cup and the cutting edge takes place.
    For other components, such as Gears could not be required to turn the forge.
    权利要求:
    Claims (10)
    [1]
    Claims: 1. Method for processing a blank in a processing machine, in particular a milling machine, characterized in that at least two processing units (1, 2, 3, 4) are provided which produce a non-symmetrical workpiece (3) with a three-dimensional shape and offset edit synchronously, in particular mill, wherein the processing units (1, 2, 3,4) are controlled together.
    [2]
    2. The method according to claim 1, characterized in that four processing units (1, 2, 3, 4) offset-synchronously a workpiece (5) edit.
    [3]
    3. The method according to claim 1 or 2, characterized in that move the machining units (1, 2, 3, 4) during processing in all spatial directions or drive.
    [4]
    4. The method according to any one of claims 1 to 3, characterized in that the workpiece (5) is arranged stationary and optionally further moved stepwise about an axis.
    [5]
    5. The method according to any one of claims 1 to 4, characterized in that the workpiece (5) is a Pelton impeller, a pump impeller or a gear.
    [6]
    6. The method according to any one of claims 4 or 5, characterized in that the workpiece (5) is moved by a double angle division, for example, the Pelton cup, the impeller blades or the teeth.
    [7]
    7. Processing machine, in particular milling machine, for processing a blank, characterized in that at least two processing units (1, 2, 3, 4) are provided which produce a non-symmetrical workpiece (5) with three-dimensional shape and edit synchronously, in particular mill, wherein the processing units (1, 2, 3,4) are connected to a common control unit.
    [8]
    8. Processing machine according to claim 7, characterized in that four processing units (1, 2, 3, 4) are provided.
    [9]
    9. Processing machine according to claim 7 or 8, characterized in that the processing units (1, 2, 3, 4) are designed to be movable or mobile in all spatial directions.
    [10]
    10. Processing machine according to one of claims 7 to 9, characterized in that the workpiece (5) is arranged stationarily on a work table (18) and the work table (18) is optionally further moved stepwise about an axis.
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    同族专利:
    公开号 | 公开日
    AT516093B1|2016-10-15|
    MX2015009848A|2016-01-29|
    EP2979809A1|2016-02-03|
    CN105312646A|2016-02-10|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE2500446A1|1974-01-12|1975-07-17|Mitsubishi Heavy Ind Ltd|MILLING MACHINE FOR PROCESSING PROPELLERS, IN PARTICULAR SHIP SCREWS|
    LU82096A1|1980-01-21|1981-09-10|Know How Ets Ind|IMPROVEMENTS ON MACHINE TOOLS OF THE MACHINING CENTER TYPE|
    DE10027509A1|2000-06-06|2001-12-13|Fotec Forschungs Und Technolog|Numerically controlled gantry milling machine has gantry in form of arc of circle fixed to foundation at both arc ends|
    JP4068611B2|2004-10-12|2008-03-26|株式会社協和エクシオ|Branching pipe connection opening drilling apparatus and processing method|
    DE102010041481A1|2010-09-27|2012-05-10|Mag Ias Gmbh|Machine tool for the production of gears|
    DE102011009793B4|2011-01-29|2013-05-23|Shw Werkzeugmaschinen Gmbh|Double milling machine with central working bridge|CN106141267B|2016-08-29|2018-01-16|南通纳侬精密机械有限公司|Root of blade numerical control hobbing lathe|
    CN106424877A|2016-10-15|2017-02-22|中国计量大学|Generating method for milling tool path of novel robot|
    CN108393524A|2018-02-13|2018-08-14|西安工程大学|A kind of nonstandard guide vane processing unitand processing method|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA602/2014A|AT516093B1|2014-07-30|2014-07-30|Method and device for processing a blank|ATA602/2014A| AT516093B1|2014-07-30|2014-07-30|Method and device for processing a blank|
    EP15176019.6A| EP2979809A1|2014-07-30|2015-07-09|Method and device for processing a blank|
    CN201510765302.2A| CN105312646A|2014-07-30|2015-07-29|Method and device for processing a blank|
    MX2015009848A| MX2015009848A|2014-07-30|2015-07-30|Method and device for processing a blank.|
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