WO2008098429A1 - A method for processing aspheric - Google Patents

A method for processing aspheric Download PDF

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Publication number
WO2008098429A1
WO2008098429A1 PCT/CN2007/001322 CN2007001322W WO2008098429A1 WO 2008098429 A1 WO2008098429 A1 WO 2008098429A1 CN 2007001322 W CN2007001322 W CN 2007001322W WO 2008098429 A1 WO2008098429 A1 WO 2008098429A1
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WO
WIPO (PCT)
Prior art keywords
workpiece
processing
aspherical
tool
lens
Prior art date
Application number
PCT/CN2007/001322
Other languages
French (fr)
Chinese (zh)
Inventor
Zhong'an Wang
Original Assignee
Wang Zhong An
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
Priority claimed from CN 200710034425 external-priority patent/CN101042440A/en
Priority claimed from CN 200710034546 external-priority patent/CN101046521A/en
Application filed by Wang Zhong An filed Critical Wang Zhong An
Publication of WO2008098429A1 publication Critical patent/WO2008098429A1/en

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Classifications

    • 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
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/04—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor grinding of lenses involving grinding wheels controlled by gearing
    • B24B13/046—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor grinding of lenses involving grinding wheels controlled by gearing using a pointed tool or scraper-like tool
    • 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
    • B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
    • B24B13/06—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor grinding of lenses, the tool or work being controlled by information-carrying means, e.g. patterns, punched tapes, magnetic tapes
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces

Definitions

  • This invention relates to a method for processing an aspherical lens or a mold, and more particularly to a method for processing an aspherical lens or a mold which is finished by machining an aspherical lens or a mold and having a small interference phenomenon.
  • the aspherical surface is divided into asymmetrical aspherical surface and asymmetric aspherical surface.
  • the asymmetric aspherical surface is also called the free surface.
  • the symmetric aspherical lens is a typical geometrical optical component used as a lens in astronomy, aerospace, aviation, medical, photography. It is widely used in fields such as ophthalmic products. It overcomes the shortcomings of spherical lenses when only paraxial rays can be concentrated, and the aberrations are large.
  • thermal deformation processing methods such as high-density high-temperature ceramic molding
  • injection molding I ⁇ molding, hot press molding, and mechanical cold processing.
  • the non-symmetric aspherical surface can be used as a special-purpose lens, especially as a personalized lens. It can solve the problem that some special vision people need to wear special lenses.
  • the lens is usually made of resin.
  • the material is cold worked.
  • the most representative one is the invention of the aspherical processing method and the aspherical forming method disclosed in Japanese Patent No. CH1522831A, published on August 25, 2004 by the Japanese Seiko Epson Co., Ltd., which uses an encoder to control the rotating workpiece.
  • the feed pitch is such that the tool is machined on the rotating workpiece along the X-axis and the Y-axis to cut the aspheric surface.
  • the encoder is used to process the workpiece with the feed pitch. It is an orthogonal machining method. (See Figure 1 for the working principle.) It is only suitable for the roughing of the lens.
  • the machining method is used to finish the aspheric surface, the tool is used. The position of the cutting edge will change on the same surface element line, that is, the normal angle of the cutting edge on the same surface element line will increase from the center of the surface to the edge of the surface, that is, the main cutting of the tool from the center.
  • the cutting of the cutting edge becomes the cutting edge of the minor cutting edge, resulting in the formation of a flange between the main and auxiliary cutting edges of the tool and the curved surface, which causes interference when cutting.
  • the interference phenomenon is more serious, which reduces the processing accuracy of the aspherical surface and affects the imaging effect of the aspherical lens. Recognizing the shortcomings of the above-mentioned orthogonal processing method, Germany's first Lislauer and the United States Gerber Coburn have successively introduced the aspherical surface with a small-diameter diamond cutter for single-point dry cutting. The interference is less, but since there is no In the grinding stage, it is difficult to meet the requirements of direct polishing surface accuracy and finish after cutting.
  • the object of the present invention is to provide an aspherical processing method with high processing precision, small processing interference, simplified process, and high production efficiency.
  • the object of the invention is as follows:
  • the processing method of the invention is: the workpiece to be processed is mounted on the rotating main shaft, and rotates around the rotating main shaft, and a tool with a swing angle 0 and a swing radius R that can be changed is arranged at a relative position of the curved surface of the workpiece to be processed, and the swing support point of the cutter Located on the center line of the workpiece to be machined, the cutting edge of the tool is cut or ground relative to the workpiece according to the same motion track as the curved surface of the workpiece to be processed, thereby completing the machining of the aspherical workpiece.
  • the design principle of the present invention is shown in Fig. 2, and the inventor's use is a new design concept. It is completely different from the orthogonal movement of the tool axes X and Y in the CNC machining in the prior art.
  • the polar coordinate method is adopted. With the oscillating support point of the tool as the pole of the polar coordinate, the oscillating support point of the tool to the center point of the lens can be set as the polar coordinate axis, and the oscillating angle ⁇ can be set as the angle between the tool and the polar coordinate axis.
  • the tool's oscillating radius R can be adjusted to the required length.
  • a tool capable of changing the swinging angle and the swinging radius R is provided at a position opposite to the curved surface of the workpiece.
  • the radius of curvature of the aspherical workpiece is programmed into a digital signal, and the digital signal is used to simultaneously control the change of the swing angle and the swing radius of the tool, so that the cutting edge of the tool produces the same motion trajectory as the curved surface of the aspheric workpiece, which is matched with the rotation.
  • the workpiece completes the machining of the aspherical workpiece.
  • the method of the invention can well control the swing angle of the cutter and the swing radius thereof, and simultaneously control the rotation angle of the cutter.
  • the master of the cutter When the radius of curvature of the curved surface changes and the position of the cutting point changes, the master of the cutter The cutting edge is always in tangent contact with the curved surface, and the tool does not interfere with the surface.
  • the processing method of the asymmetric aspherical lens of the invention can simultaneously control the swing angle and the swing radius of the tool and the rotation angle of the main shaft by using a digital signal three-axis CNC numerical control system, so that the cutting edge generates a curved surface with the asymmetric aspheric lens.
  • the same motion track can simultaneously control the swing angle and the swing radius of the tool and the rotation angle of the main shaft by using a digital signal three-axis CNC numerical control system, so that the cutting edge generates a curved surface with the asymmetric aspheric lens. The same motion track.
  • the method of the invention can be programmed into different digital signals according to the radius of curvature of the workpiece with various specifications and parameters, and the processing of different aspherical workpieces can be completed by the method of the invention, the processing interference is small, and the processing precision is high productivity.
  • Fig. 1 is a working principle diagram of an orthogonal processing method in a conventional processing method.
  • M represents the interference phenomenon of the tool.
  • 2 is a working principle diagram of the polar coordinate method of the invention of FIG.
  • FIG. 3 is a plan view showing a processing apparatus of a method for processing an aspherical lens of the present invention
  • Figure 4 is a cross-sectional view taken along line A- of Figure 3,
  • the processing device of the present invention is provided with a rough-worked semi-finished lens 1; a rotating spindle 2, which can drive the lens to rotate around the spindle; and the cutter 6 is a movable rotary grinding head or a diamond cutter.
  • the spindle 2 is provided with a servo motor 11119 with an encoder, the spindle 2 is disposed on the carriage 3, and the carriage guide 4 is provided under the carriage 3.
  • a chuck 9 is fixed to the spindle 2 end, and a lens 1 is mounted on the chuck 9.
  • the oscillating plate 7 is disposed on the right side of the frame 5 opposite to the curved surface of the lens 1.
  • the oscillating plate 7-end is movably connected to the upper end of the rotating shaft 10, and the lower end of the rotating shaft 10 is fixed on the spindle axis position on the base 5, in the oscillating plate 7
  • a gear plate 15 is fixedly mounted on the lower end of the other end, and a drive gear 14 is mounted on the base 5 at the lower portion of the swing plate 7.
  • the drive gear 14 meshes with the gear plate 15.
  • the drive gear 14 is mounted on the base 5 with an encoder.
  • the servo motor 1 13 is driven so that the swinging plate 7 can be swung around the rotating shaft 10 to change the swing angle ⁇ of the cutter 6.
  • a moving plate 8 movable along the moving rail 16 is disposed on the swinging plate 7, and the moving plate 8 is connected to the encoder servo motor II 18 via the screw 17, so that the tool 6 swings by the movement of the moving plate 8 A change has occurred.
  • a high-speed motor 12 is fixedly mounted on the moving plate 8, and the high-speed motor 12 is connected to the cutter 6.
  • the tool 6 on the moving plate 8 is oscillating while the tool 6 has a swing radius relative to The surface can be changed at the same time, so that the tool 6 swings while rotating, and its swing radius changes at the same time while swinging.
  • the high-speed motor 12 is removed, and the tool 6 can be turned into a single-point dry cut using a diamond knife to complete the roughing of the aspherical workpiece.
  • the combined digital signal of the three motions of the swing angle 0 and the swing radius R and the spindle rotation angle controlled by the encoder using the radius of curvature of the surface of the asymmetric aspheric lens and the range of the change region are used, and the three-axis is used.
  • the CNC box 11 system controls the mutual motion of the three movements, so that the rotary grinding head (the cutting edge of the tool) produces the same motion trajectory as the curved surface of the asymmetric aspheric lens, thereby completing the mechanical mechanism of the asymmetric aspheric lens surface.
  • the device is the same as the first embodiment, according to the combined digital signal of the swing angle ⁇ and the swing radius R of the curved radius of curvature of the surface of the symmetric aspherical lens or the mold and the range of the change region, the numerical control box only controls the cutter according to the input computer.
  • the oscillating angle ⁇ and the oscillating radius R can be processed into a symmetrical aspherical lens or mold.
  • the other device is the same as the first embodiment except that the lead screw 17 and the servo motor 18 are removed, and the linear servo motor is replaced by the moving plate 8.
  • the length of the swing radius R can also be adjusted.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)

Abstract

A method for processing an aspheric, in which a workpiece prepared for processing is fixed on a main rotation axis (2), and rotated by the main rotation axis, a cutter (6) whose swing angle q and swing radius R is changeable is setted opposite with the curved surface of the workpiece prepared for processing, the support point for the cutter swinging is on the center line of the workpiece prepared for processing, the main cutting edge of the cutter always be tangent with the curved surface during cutting.

Description

一种非球面的加工方法  Aspherical processing method
技术领域 Technical field
本发明涉及一种非球面透镜或模具的加工方法，特别是涉及精加工非球面透 镜或模具， 加工干涉现象小的一种非球面透镜或模具的加工方法。  BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a method for processing an aspherical lens or a mold, and more particularly to a method for processing an aspherical lens or a mold which is finished by machining an aspherical lens or a mold and having a small interference phenomenon.
背景技术 Background technique
非球面分为对称非球面和非对称非球面， 非对称非球面也叫自由面， 对称非 球面透镜是一种典型的几何光学元件， 它作为透镜使用， 在天文、 航天、 航空、 医疗、 摄影和眼用产品等领域、用途非常广泛， 它克服了球面透镜成像时只有近 轴光线才能汇聚一点， 像差大等缺陷。非球面透镜的加工方法有很多， 有热变形 加工方法 （如高密度高温陶瓷成型法)、 注: I†成型法、 热压成型法和机械冷加工 方法。而非对称非球面可以作为特别用途的镜片使用，特别是作为个性化的透镜 使用比较多， 它能解决一些特殊视觉的人需佩戴特殊镜片的问题， 具有特定的用 途，这种镜片通常由树脂材料冷加工而成。最具有代表性的是日本东京精工爱普 生株式会社于 2004年 8月 25日公开的， 公开号为 CN1522831A的非球面加工方 法和非球面形成方法的发明申请， 该申请是利用编码器控制旋转工件的进给节 距， 使刀具在旋转的工件上， 沿 X轴和 Y轴的移动进行加工， 切削出非球面， 由 于这种加工方法是其刀具是沿 X轴和 Y轴移动，使刀具在按编码器控制进给节距 的工件上加工， 是一种正交加工法， （工作原理参见图 1 ) 它只适用透镜的粗加 工，该加工方法在精加工非球面曲面素线时，其刀具切削刃带位置在同一曲面素 线上会发生变化，即在同一曲面素线上切削刃点所在的法线角度从曲面中心开始 到曲面边缘会越来越增大，即刀具从中心的主切削刃切削变为边缘的副切削刃切 削， 导致在刀具的主副切削刃与曲面之间形成凸缘， 切削时会产生干涉现象， 随 着曲面素线的曲率半径减小或使用宽刃刀具时， 干涉现象越严重， 从而会降低非 球面曲面的加工精度，影响非球面透镜的成像效果。 由于认识到上述正交加工法 的缺点，德国先利士劳尔、美国格柏 ·柯本公司先后推出用小半径金刚石刀具单 点干切来加工非球面， 干涉是少了， 但由于没有经过磨削阶段， 切削完后， 直接 抛光表面精度和光洁度很难达到要求。  The aspherical surface is divided into asymmetrical aspherical surface and asymmetric aspherical surface. The asymmetric aspherical surface is also called the free surface. The symmetric aspherical lens is a typical geometrical optical component used as a lens in astronomy, aerospace, aviation, medical, photography. It is widely used in fields such as ophthalmic products. It overcomes the shortcomings of spherical lenses when only paraxial rays can be concentrated, and the aberrations are large. There are many methods for processing aspherical lenses, such as thermal deformation processing methods (such as high-density high-temperature ceramic molding), and injection molding: I† molding, hot press molding, and mechanical cold processing. The non-symmetric aspherical surface can be used as a special-purpose lens, especially as a personalized lens. It can solve the problem that some special vision people need to wear special lenses. The lens is usually made of resin. The material is cold worked. The most representative one is the invention of the aspherical processing method and the aspherical forming method disclosed in Japanese Patent No. CH1522831A, published on August 25, 2004 by the Japanese Seiko Epson Co., Ltd., which uses an encoder to control the rotating workpiece. The feed pitch is such that the tool is machined on the rotating workpiece along the X-axis and the Y-axis to cut the aspheric surface. Since the machining method is such that the tool moves along the X-axis and the Y-axis, the tool is pressed. The encoder is used to process the workpiece with the feed pitch. It is an orthogonal machining method. (See Figure 1 for the working principle.) It is only suitable for the roughing of the lens. When the machining method is used to finish the aspheric surface, the tool is used. The position of the cutting edge will change on the same surface element line, that is, the normal angle of the cutting edge on the same surface element line will increase from the center of the surface to the edge of the surface, that is, the main cutting of the tool from the center. The cutting of the cutting edge becomes the cutting edge of the minor cutting edge, resulting in the formation of a flange between the main and auxiliary cutting edges of the tool and the curved surface, which causes interference when cutting. When the radius of curvature of the surface line is reduced or a wide-blade tool is used, the interference phenomenon is more serious, which reduces the processing accuracy of the aspherical surface and affects the imaging effect of the aspherical lens. Recognizing the shortcomings of the above-mentioned orthogonal processing method, Germany's first Lislauer and the United States Gerber Coburn have successively introduced the aspherical surface with a small-diameter diamond cutter for single-point dry cutting. The interference is less, but since there is no In the grinding stage, it is difficult to meet the requirements of direct polishing surface accuracy and finish after cutting.
发明内容 本发明的目的旨在提供一种加工精度高， 加工干涉性很小， 工艺简化， 生产 效率高一种非球面的加工方法。 Summary of the invention The object of the present invention is to provide an aspherical processing method with high processing precision, small processing interference, simplified process, and high production efficiency.
本发明的目的是通过下述方式的：  The object of the invention is as follows:
本发明加工方法为：被加工工件装于旋转主轴上，并以旋转主轴为中心旋转， 在被加工工件曲面相对位置上设置有摆动角度 0和摆动半径 R可变化的刀具，刀 具的摆动支撑点位于被加工工件的中心线上，刀具的切削刃按照与被加工工件曲 面素线相同的运动轨迹相对于被加工工件移动切削或磨削，从而完成非球面工件 的加工。  The processing method of the invention is: the workpiece to be processed is mounted on the rotating main shaft, and rotates around the rotating main shaft, and a tool with a swing angle 0 and a swing radius R that can be changed is arranged at a relative position of the curved surface of the workpiece to be processed, and the swing support point of the cutter Located on the center line of the workpiece to be machined, the cutting edge of the tool is cut or ground relative to the workpiece according to the same motion track as the curved surface of the workpiece to be processed, thereby completing the machining of the aspherical workpiece.
控制旋转主轴的转动角度， 则可以完成非对称非球面透镜的加工。  By controlling the angle of rotation of the rotating main shaft, the machining of the asymmetrical aspherical lens can be completed.
本发明的设计原理参见图' 2所示，发明人釆用是一种新的设计理念。与现有 技术中的数控切削加工中刀具坐标轴 X和 Y的正交移动完全不同。在对加工刀具 的控制上采用的是极坐标的方式。以刀具的摆动支撑点为极坐标的极点， 刀具的 摆动支撑点到透镜中心点可设为极坐标轴，所述的摆动角度 Θ可设置为刀具与极 坐标轴之间的角度。刀具的摆动半径 R可以调控到所需的长度。 由于非球面工件 固定装在旋转主轴上， 在工件曲面相对的位置上设置有可摆动角度和摆动半径 R 又可变化的刀具。将非球面工件的曲率半径编制成数字信号，用数字信号来同时 控制刀具的摆动角度和摆动半径的变化，使刀具的切削刃产生与非球面工件曲面 - 素线相同的运动轨迹， 配合旋转的工件， 完成非球面工件的机械加工。  The design principle of the present invention is shown in Fig. 2, and the inventor's use is a new design concept. It is completely different from the orthogonal movement of the tool axes X and Y in the CNC machining in the prior art. In the control of the machining tool, the polar coordinate method is adopted. With the oscillating support point of the tool as the pole of the polar coordinate, the oscillating support point of the tool to the center point of the lens can be set as the polar coordinate axis, and the oscillating angle Θ can be set as the angle between the tool and the polar coordinate axis. The tool's oscillating radius R can be adjusted to the required length. Since the aspherical workpiece is fixedly mounted on the rotating main shaft, a tool capable of changing the swinging angle and the swinging radius R is provided at a position opposite to the curved surface of the workpiece. The radius of curvature of the aspherical workpiece is programmed into a digital signal, and the digital signal is used to simultaneously control the change of the swing angle and the swing radius of the tool, so that the cutting edge of the tool produces the same motion trajectory as the curved surface of the aspheric workpiece, which is matched with the rotation. The workpiece completes the machining of the aspherical workpiece.
本发明的这种方式便可以很好地控制刀具的摆动角度和其摆动半径，同时控 制刀具的旋转角度，在加工过程中， 当曲面曲率半径发生变化和切削点位置发生 变化时，刀具的主切削刃始终与曲面相切接触，刀具在曲面上不会产生干涉现象。  The method of the invention can well control the swing angle of the cutter and the swing radius thereof, and simultaneously control the rotation angle of the cutter. During the machining process, when the radius of curvature of the curved surface changes and the position of the cutting point changes, the master of the cutter The cutting edge is always in tangent contact with the curved surface, and the tool does not interfere with the surface.
本发明的非对称非球面透镜的加工方法可釆用数字信号三轴 CNC 数控系统 来同时控制刀具的摆动角度和摆动半径以及主轴的旋转角度，使切削刃产生与非 对称非球面透镜曲面素线相同的运动轨迹。  The processing method of the asymmetric aspherical lens of the invention can simultaneously control the swing angle and the swing radius of the tool and the rotation angle of the main shaft by using a digital signal three-axis CNC numerical control system, so that the cutting edge generates a curved surface with the asymmetric aspheric lens. The same motion track.
本发明的方法可根据各种不同规格参数的工件的曲率半径，编制成不同的数 字信号， 用本发明的方法就可完成不同非球面工件的加工， 其加工干涉性很小， 且加工精度和生产效率高。  The method of the invention can be programmed into different digital signals according to the radius of curvature of the workpiece with various specifications and parameters, and the processing of different aspherical workpieces can be completed by the method of the invention, the processing interference is small, and the processing precision is high productivity.
附图说明  DRAWINGS
图 1为现有加工方法中的正交加工法的工作原理图。 M表示刀具的干涉现象。 图 2为 ί发明的极坐标法的工作原理图。 Fig. 1 is a working principle diagram of an orthogonal processing method in a conventional processing method. M represents the interference phenomenon of the tool. 2 is a working principle diagram of the polar coordinate method of the invention of FIG.
图 3是本发明非球面透镜的加工方法的加工装置平面示意图，  3 is a plan view showing a processing apparatus of a method for processing an aspherical lens of the present invention,
图 4是图 3的 A- Α剖视图，  Figure 4 is a cross-sectional view taken along line A- of Figure 3,
在图 3、 图 4中， 1、 透镜 2、 主轴 3、 拖板 4、 导轨 5、 机座 6、 刀 具 7、 摆动板 8、 移动板 9、 卡盘 10、 转轴 11、 数控箱 12、 高速电机 13、伺服电机 I 14、驱动齿轮 15、齿轮板 16、移动导轨 17、丝杆 18、 伺服电机 II 19、 伺服电机 III  3, 4, 1, lens 2, spindle 3, carriage 4, guide rail 5, base 6, cutter 7, swing plate 8, moving plate 9, chuck 10, shaft 11, CNC box 12, high speed Motor 13, servo motor I 14, drive gear 15, gear plate 16, moving guide 17, screw 18, servo motor II 19, servo motor III
具体实施方式  detailed description
以下实施例旨在说明本发明而不是对本发明的限定。  The following examples are intended to illustrate the invention and not to limit the invention.
实施例 1  Example 1
下面结合图 3和图 4进行具体说明。本发明的加工装置设有一经粗加工的半 成品透镜 1 ; 旋转主轴 2, 可带动透镜以该主轴为中心旋转； 刀具 6为可移动的 旋转磨头或金刚石刀。  The details will be described below with reference to Figs. 3 and 4. The processing device of the present invention is provided with a rough-worked semi-finished lens 1; a rotating spindle 2, which can drive the lens to rotate around the spindle; and the cutter 6 is a movable rotary grinding head or a diamond cutter.
主轴 2上设有带编码器的伺服电机 11119， 主轴 2设置在拖板 3上， 拖板 3下 设有拖板导轨 4。  The spindle 2 is provided with a servo motor 11119 with an encoder, the spindle 2 is disposed on the carriage 3, and the carriage guide 4 is provided under the carriage 3.
在主轴 2—端固定装有卡盘 9， 卡盘 9上装有透镜 1。  A chuck 9 is fixed to the spindle 2 end, and a lens 1 is mounted on the chuck 9.
透镜 1加工曲面相对的机座 5右侧设有摆动板 7， 摆动板 7—端与转轴 10 上端活动相连， 转轴 10下端固定在机座 5上的主轴轴心线位置上， 在摆动板 7 另一端下部固定装有齿轮板 15， 在摆动板 7下部的机座 5上装有驱动齿轮 14， 驱动齿轮 14与齿轮板 15相啮合， 驱动齿轮 14用装在机座 5上的带编码器的伺 服电机 1 13来驱动， 从而可使摆动板 7可绕转轴 10摆动， 使刀具 6的摆动角度 Θ发生变化。  The oscillating plate 7 is disposed on the right side of the frame 5 opposite to the curved surface of the lens 1. The oscillating plate 7-end is movably connected to the upper end of the rotating shaft 10, and the lower end of the rotating shaft 10 is fixed on the spindle axis position on the base 5, in the oscillating plate 7 A gear plate 15 is fixedly mounted on the lower end of the other end, and a drive gear 14 is mounted on the base 5 at the lower portion of the swing plate 7. The drive gear 14 meshes with the gear plate 15. The drive gear 14 is mounted on the base 5 with an encoder. The servo motor 1 13 is driven so that the swinging plate 7 can be swung around the rotating shaft 10 to change the swing angle Θ of the cutter 6.
在摆动板 7上面设有可沿移动导轨 16运动的移动板 8， 移动板 8—端通过 丝杆 17与带编码器伺服电机 II 18相连， 从而通过移动板 8的移动使刀具 6摆动 半径 R发生变化。  A moving plate 8 movable along the moving rail 16 is disposed on the swinging plate 7, and the moving plate 8 is connected to the encoder servo motor II 18 via the screw 17, so that the tool 6 swings by the movement of the moving plate 8 A change has occurred.
在移动板 8上固定装有高速电机 12， 高速电机 12与刀具 6相连， 当摆动板 和移动板同时分别摆动和移动时， 移动板 8上刀具 6在摆动的同时， 其刀具 6 摆动半径相对曲面可同时发生变化，使刀具 6在旋转的同时又摆动，在摆动的同 时其摆动半径同时又发生变化。 去掉高速电机 12， 刀具 6釆用的是金刚石刀就可以变成单点干切， 完成非 球面工件的粗加工。 A high-speed motor 12 is fixedly mounted on the moving plate 8, and the high-speed motor 12 is connected to the cutter 6. When the swinging plate and the moving plate are respectively swung and moved at the same time, the tool 6 on the moving plate 8 is oscillating while the tool 6 has a swing radius relative to The surface can be changed at the same time, so that the tool 6 swings while rotating, and its swing radius changes at the same time while swinging. The high-speed motor 12 is removed, and the tool 6 can be turned into a single-point dry cut using a diamond knife to complete the roughing of the aspherical workpiece.
根据输入计算机内的，利用非对称非球面透镜的曲面曲率半径及其变化区域 范围编制的摆动角度 0和摆动半径 R 以及由编码器控制的主轴旋转角度三种运 动的组合数字信号，用三轴 CNC数控箱 11系统来控制三种运动的相互组合运动， 使旋转磨头 (刀具的切削刃）产生与非对称非球面透镜曲面素线相同的运动轨迹， 从而完成非对称非球面透镜曲面的机械加工，利用上述数控切削装置加工非对称 非球面透镜， 当透镜曲面曲率半径变化值较小或用窄刃刀具加工时， 曲面加工不 会产生干涉现象， 当曲面曲率半径变化值较大或釆用宽刃刀具时，加工产生干涉 性很小。  According to the input computer, the combined digital signal of the three motions of the swing angle 0 and the swing radius R and the spindle rotation angle controlled by the encoder using the radius of curvature of the surface of the asymmetric aspheric lens and the range of the change region are used, and the three-axis is used. The CNC box 11 system controls the mutual motion of the three movements, so that the rotary grinding head (the cutting edge of the tool) produces the same motion trajectory as the curved surface of the asymmetric aspheric lens, thereby completing the mechanical mechanism of the asymmetric aspheric lens surface. Machining, using the above-mentioned numerical control cutting device to process asymmetric aspherical lens, when the lens surface curvature radius change value is small or when machining with a narrow-edged tool, the surface machining does not cause interference phenomenon, when the surface curvature radius changes value is large or used When the wide-blade tool is used, the machining has little interference.
实施例 2  Example 2
装置同实施例 1， 根据输入计算机内的， 利用对称非球面透镜或模具的曲面 曲率半径及其变化区域范围编制的摆动角度 Θ和摆动半径 R两种运动的组合数 字信号， 数控箱只控制刀具的摆动角度 Θ和摆动半径 R， 则可加工对称非球面透 镜或模具。  The device is the same as the first embodiment, according to the combined digital signal of the swing angle Θ and the swing radius R of the curved radius of curvature of the surface of the symmetric aspherical lens or the mold and the range of the change region, the numerical control box only controls the cutter according to the input computer. The oscillating angle Θ and the oscillating radius R can be processed into a symmetrical aspherical lens or mold.
实施例 3  Example 3
其它装置同实施例 1， 只是去掉丝杆 17、 伺服电机 18， 换成直线伺服电机 拖动移动板 8， 同样可以调控摆动半径 R的长度。  The other device is the same as the first embodiment except that the lead screw 17 and the servo motor 18 are removed, and the linear servo motor is replaced by the moving plate 8. The length of the swing radius R can also be adjusted.

Claims

权 利 要 求 Rights request
1、 一种非球面加工方法， 其特征在于： 被加工工件装于旋转主轴上， 并以 旋转主轴为中心旋转，在被加工工件曲面相对位置上设置有摆动角度 Θ和摆动半 径 R可变化的刀具， 刀具的摆动支撑点位于被加工工件的中心线上，刀具的切削 刃按照与被加工工件曲面素线相同的运动轨迹相对于被加工工件移动切削或磨 肖 I」， 从而完成非球面工件的加工。  1. An aspherical processing method, characterized in that: the workpiece to be processed is mounted on a rotating main shaft and rotated about a rotating main shaft, and a swing angle Θ and a swing radius R are set at a relative position of the curved surface of the workpiece to be processed. The oscillating support point of the tool is located on the center line of the workpiece to be machined, and the cutting edge of the tool moves or cuts relative to the workpiece according to the same trajectory as the curved surface of the workpiece to complete the aspheric workpiece. Processing.
2、 根据权利要求 1所述的一种非球面加工方法， 其特征在于： 控制旋转主 轴的旋转角度， 完成非对称非球面工件的加工。  2. An aspherical machining method according to claim 1, wherein: the rotation angle of the rotating main shaft is controlled to complete the machining of the asymmetrical aspherical workpiece.
PCT/CN2007/001322 2007-02-13 2007-04-23 A method for processing aspheric WO2008098429A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN 200710034425 CN101042440A (en) 2007-02-13 2007-02-13 Processing method for aspheric lens and lens moulds
CN200710034425.4 2007-02-13
CN 200710034546 CN101046521A (en) 2007-03-16 2007-03-16 Process of producing asymmetric aspheric lens
CN200710034546.9 2007-03-16

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JP2004154888A (en) * 2002-11-06 2004-06-03 Olympus Corp Grinding process for convex-shaped object
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CN1693021A (en) * 2005-06-13 2005-11-09 长春理工大学 Method and apparatus for processing non-spherical surface by using cutter oscillation

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3842713A (en) * 1973-06-04 1974-10-22 Mc Donnell Douglas Corp Aspheric lens generator
US4928435A (en) * 1985-05-21 1990-05-29 Matsushita Electric Industrial Co., Ltd. Apparatus for working curved surfaces on a workpiece
JPH09248748A (en) * 1996-03-12 1997-09-22 Nikon Corp Machining device
JPH09300189A (en) * 1996-05-21 1997-11-25 Olympus Optical Co Ltd Curved face cutting and machining method
JP2004154888A (en) * 2002-11-06 2004-06-03 Olympus Corp Grinding process for convex-shaped object
JP2005279902A (en) * 2004-03-31 2005-10-13 Olympus Corp Polishing device and polishing method
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