• 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:

    公开号:DK200801596A
    申请号:DK200801596
    申请日:2008-11-17
    公开日:2009-05-21
    发明作者:Michael A Betz；Eric D Bretey
    申请人:Sauer Danfoss Inc；
    IPC主号:
    专利说明:

    The invention relates to a method for removing material from a surface. The invention specifically relates to a method for measuring applied pressure to control the material removal rate from a machined surface.
    In the manufacture of products, often to provide desired surfaces, a removal mechanism containing a abrasive surface thereon is used to thoroughly process components. In particular, for a typical application of a flat honing process (a method of removing material from a surface, usually a flat or nearly planar surface of a workpiece by rotating a hard, flexible, abrasive surface), the material removal rate will be a function of the age of the adhesive abrasive and the pressure applied to the workpiece, as well as other relative surface shifts
    The differences in material removal rates affect important tribological surfaces, such as topography or finish, and surface shape or flatness, as well as dimensional properties. The material removal rate of the current type of machinery shows that the typical removal rate decreases with an exponential rate for constant cycle time lengths and fixed applied pressures. This characteristic includes a variation in surface topography and surface shape even! as dimensional properties of the part to be honed plane,
    The prior art is limited by its ability to reduce variations as well as provide feedback to a control system to adjust the applied pressure to a workpiece thereby reducing the materiality and ultimately the total amount of material removed. Thus, there is a need to provide an improved method of optimizing both surface topography and shape while still minimizing manufacturing costs.
    Thus, a principal object of the invention is to provide an improved method for machining a planar working surface.
    Another object of the invention is to use a closed feedback circuit to change the machining process.
    Yet another object of the invention is to reduce the total manufacturing cost by providing an improved method of processing.
    These and other objects, features and advantages of the invention will become apparent from the following description and claims
    According to the invention, there is provided a method of adjusting the applied pressure to control the material removal rate on a workpiece. The method includes measuring the pressure applied to the workpiece by a pressure inducing mechanism, and in addition measuring the position of the pressure inducing mechanism. Next, the measured applied pressure and measured position of the pressure-inducing mechanism are transmitted to a master controller such that the master controller sets the pressure applied to the workpiece based on the data to produce a desired working surface property.
    The attached drawing shows a side cross-sectional view of a mechanism used to process a work surface
    The figure shows a machining mechanism 10 used to remove the surface 11 of a workpiece 12. The machining mechanism 10 has three main components, a pressure inducing mechanism 14, a pressure transducer 16, and a pressure applying mechanism 18, all interconnected.
    According to one embodiment, the pressure-inducing mechanism 14 is a pressure cylinder, such as an air cylinder or possibly an air cylinder. a ball screw actuator or the like. The pressure inducing mechanism 14 further has a sensor 20 attached thereto which is used to measure the linear position of the pressure inducing mechanism 14. In a preferred embodiment, the sensor 20 consists of a linear variable differential transformer (LVDT) connected electrically to a master controller 22 for transmitting a constant signal to the master controller 22 with information on the position of the pressure inducing mechanism 14.
    The pressure transducer 16 is considered a pressure cell and has an attachment portion 24 extending therefrom for attachment with the pressure-producing mechanism 14. In the embodiment shown in the figure, the attachment mechanism 24 may be a threaded shaft located through the pressure-producing mechanism 14 and secured therein. by means of a washer element 26 and a nut element 28. The pressure-inducing mechanism 14 cannot be rotated relative to the pressure transducer 16. Thus, the pressure transducer 16, by being connected to the master controller 22, allows the master controller to collect data such as applied pressure and position thereof. pressure inducing mechanism 14.
    From the pressure transducer, another attachment portion 30 connecting the pressure transducer 16 is rotatably connected to the pressure applying mechanism 18 through anti-friction bearings 32 Anti-friction bearings 32 allow relative rotation between the pressure-producing mechanism 14 and the pressure-applying mechanism 18 connected to the workpiece 12
    The workpiece 12 is then engaged with an abrasive material 34 which is used to work the workpiece 12
    In operation, the pressure-applying mechanism 18 rotates with respect to the pressure transducer 16 and the pressure-inducing mechanism 14 and affects the workpiece 12 The surface 11 of the workpiece 12 is thus worked with the abrasive material 34. When the surface 11 of the workpiece 12 is worked, the pressure transducer 16 communicates with the master controller. 22 to measure the pressure applied to the workpiece 12 from the pressurizing mechanism 14, while the sensor 20 measures the position of the pressurizing mechanism 14 The measured compressive forces are then transmitted to the master controller 22 so that the master controller 22 regulates the pressure applied to the workpiece 12 on this information. As a result, the measurement of current or voltage controls the pressure supplied by the pressure-inducing mechanism 14,
    By controlling the pressure provided by the pressure-producing mechanism 14 by means of the master controller 22, an improved, more efficient removal of material is provided. Not only does this machining process provide a better surface topography and shape in dimension, but additional costs are reduced in the manufacturing process. at least all the stated purposes have been met.
    It will be clear to those skilled in the art that other modifications could be made to the mechanism without departing from the spirit and scope of the invention. All such modifications and modifications fall within the scope of the claims and are envisaged to be covered.
    权利要求:
    Claims (7)
    [1]
    A method of adjusting applied pressure to control the material removal rate of a workpiece, comprising the following steps: measuring the pressure applied to the workpiece by a pressure-producing mechanism; measuring the position of the pressure-inducing mechanism; transmitting the measured, applied pressure and measured position of the pressure-producing mechanism to a master controller, and setting the pressure exerted on the workpiece based on the measured, applied pressure and the measured position of the pressure-producing mechanism.
    [2]
    A method according to claim 1, wherein the pressure-producing mechanism is a pressure cylinder
    [3]
    The method of claim 1, wherein the pressure-producing mechanism has a linearly variable differential transformer measuring the position of the pressure-producing mechanism.
    [4]
    A method according to claim 1, wherein the pressure-producing mechanism is attached to a pressure transducer.
    [5]
    A method according to claim 4, wherein the pressure transducer is a pressure cell.
    [6]
    A method according to claim 4, wherein a pressure-producing mechanism is rotatably attached to the pressure transducer.
    [7]
    The method of claim 3, wherein the linearly variable differential transformer is electrically connected and communicates with the master controller
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    同族专利:
    公开号 | 公开日
    US20090126512A1|2009-05-21|
    CN101486166A|2009-07-22|
    JP2009125926A|2009-06-11|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    US4027434A|1973-05-29|1977-06-07|Coburn Optical Industries, Inc.|Edging apparatus for ophthalmic lens|
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    DE69009890T2|1989-02-23|1994-09-22|Supfina Maschf Hentzen|METHOD AND DEVICE FOR FINISHING AND SUPFINING.|
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    JP4111860B2|2003-04-21|2008-07-02|富士通株式会社|Data generation method, program and apparatus for object processing|
    JP4926506B2|2006-03-13|2012-05-09|住友精密工業株式会社|Aircraft leg lift actuator with excellent snubbing function|CN102059649A|2010-12-03|2011-05-18|河源富马硬质合金股份有限公司|Method for monitoring radial grinding force of grinder and realizing constant-force feeding|
    JP5930871B2|2012-06-27|2016-06-08|コマツＮｔｃ株式会社|Grinding apparatus and control method thereof|
    CN104875101B|2014-02-28|2017-11-10|中国科学院宁波材料技术与工程研究所|Polishing method and system|
    WO2017039544A1|2015-09-01|2017-03-09|Nanyang Technological University|Instrumented tools for monitoring interaction dynamics during contact task|
    CN110039449B|2018-01-15|2020-07-10|上海铼钠克数控科技股份有限公司|Grinding method and system applied to grinding robot|
    法律状态:
    2010-01-25| AHS| Application shelved for other reasons than non-payment|
    优先权:
    申请号 | 申请日 | 专利标题
    US11/943,358|US20090126512A1|2007-11-20|2007-11-20|Method for sensing applied force for controlling the material removal rate for a flat fine machined surface|
    US94335807|2007-11-20|
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