Off-axis free surface turning method by actively changing spindle rotating speed

A spindle speed and spindle technology, applied in the direction of automatic control devices, feeding devices, manufacturing tools, etc., can solve problems such as uneven processing surface quality, and achieve the effect of uniform processing surface quality

Active Publication Date: 2012-05-30
德扬智能装备(苏州)股份有限公司
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Problems solved by technology

[0004] In summary, one of the problems of the existing optical free-form surface diamond turning method is that the cutting speed of the contact point of the diamond tool depends on the coordinate position of the contact point, and the different cutting speeds will result in machining at different contact points. The quality of the surface is not uniform, which is especially important in precision and ultra-precision machining

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  • Off-axis free surface turning method by actively changing spindle rotating speed
  • Off-axis free surface turning method by actively changing spindle rotating speed
  • Off-axis free surface turning method by actively changing spindle rotating speed

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Embodiment Construction

[0029] figure 1 A schematic diagram of the off-axis arrangement of two or more free-form surface workpieces 3 on the fixture positioning reference plane 2 is shown. by figure 1 It can be seen that in the circumferential direction coaxial with the center of rotation of the spindle 1, two or more workpieces are installed on the fixture at equal intervals, figure 1 Take 4 workpieces as an example to ensure the inertia balance of two or more workpieces during the rotation of the spindle, and make the minimum radius of gyration of the diamond tool contact point on the free-form surface deviate from the center of rotation of the spindle.

[0030] figure 2 It shows the machining movement required for off-axis turning to create a free-form surface. For free-form surface workpieces, whether it is installed coaxially or off-axis, it is difficult to eliminate the non-rotational symmetry of the surface to be processed, which makes the tool must perform rapid reciprocating motion on the X ...

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Abstract

The invention relates to an off-axis free surface turning method by actively changing spindle rotating speed, and belongs to an ultra-precision cutting and complex surface optical part cutting method. The method comprises the following steps of: performing off-axis mounting of two or more free surface workpieces in an equally spaced mode, wherein the off-axis mounting position and posture are adjustable; and actively changing the spindle rotating speed according to a coordinate position of a contact point of a diamond cutter so as to ensure consistency of the cutting speed on the machined surface. The invention has the advantages that: the dependence of the cutting speed on the contact point position of the diamond cutter is decoupled, a free surface is formed due to off-axis turning, anduniform and consistent quality of the machined surface can be obtained; moreover, the method is simple and convenient, and is easy to implement.

Description

Technical field [0001] The invention belongs to the technical fields of ultra-precision processing and complex curved surface optical parts processing, etc., and relates to an off-axis turning free-form surface method that actively changes the spindle speed. Background technique [0002] Optical free-form surfaces have many unparalleled advantages. They have increasing application requirements in important industrial fields such as national defense, aerospace, microelectronics and optoelectronics. Therefore, there is an urgent need to provide an efficient, precise and low-cost processing for the industry. Method of creating optical free-form surfaces. So far, diamond turning based on Fast Tool Servo (FTS) is considered to be the most promising method, but there are still many problems. [0003] In the existing diamond turning method, the free-form surface workpiece and the diamond lathe spindle are usually installed coaxially, that is, the geometric axis of the free-form surface t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23Q15/10B23B1/00
Inventor 周晓勤朱志伟赵绍昕邹青
Owner 德扬智能装备(苏州)股份有限公司
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