Processing method of ferrous metal super-finishing surface

A ferrous metal and processing method technology, applied in metal processing equipment, metal processing mechanical parts, metal material coating technology and other directions, can solve the problems of gaps and limited effect of diamond tool wear, achieve inhibition of wear and improve chemical reduction. The effect of grinding

Inactive Publication Date: 2012-07-04
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned single method has a limited effect on reducing the wear of diam

Method used

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  • Processing method of ferrous metal super-finishing surface
  • Processing method of ferrous metal super-finishing surface
  • Processing method of ferrous metal super-finishing surface

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0037] Embodiment 1: It is used to process super-precision surfaces with conductable curvature. This type of surface includes flat, spherical, quadratic and cubic curved surfaces. At this time, the present invention includes the following implementation steps:

[0038] 1) Preparation before processing: an ultra-precision or precision CNC lathe must be provided, which has at least a main shaft and two linear servo axes x and z to turn complex surfaces; the ultrasonic excitation device is installed vertically as a functional component On the base of the lathe, the lower end is connected to the base of the lathe through a flange, and the upper end is equipped with a diamond tool; the piezoelectric ceramic drive power is prepared and connected to the electrode of the ultrasonic excitation device transducer; the carbon-containing cutting fluid is prepared, and the Under simple conditions, the graphite powder particles can be used as printer toner, and the cutting fluid after adding gra...

Example Embodiment

[0043] Embodiment 2: It is used to process super-precision surfaces with non-conductive curvature, such as Fresnel mirrors, groove array surface structures, etc. At this time, the present invention includes the following implementation steps:

[0044] 1) Preparation before processing: Same as the first embodiment.

[0045] 2) Rough cutting: same as the first embodiment.

[0046] 3) Semi-finishing: The tool is changed to a CVD thick-film diamond tool with a rake angle of 0, a back angle of 10, and a sharp cutting edge; the rest is the same as the first embodiment; during the machining process, the CNC program is used to initially cut the contour.

[0047] 4) Perform surface ion nitriding treatment on the semi-finished workpiece; the same as the first embodiment.

[0048] 5) Final cutting processing: processing with a natural single crystal diamond tool with sharp cutting edges; cutting tool rake angle 0, relief angle 5, tool tip angle and fillet are designed according to the shape to be ...

Example Embodiment

[0049] Embodiment 3: In the case of limited nitriding treatment conditions or strict time and cost control, the nitriding treatment on the surface of the workpiece can be omitted; because the ultrasonic vibration of the tool and the protection of the cutting fluid atmosphere can also be used at the same time to achieve better Diamond tool wear reduction effect; if the physical and chemical properties of the workpiece surface are required at the same time, quenching treatment can be added before the final machining. At this time, the specific implementation is as follows:

[0050] 1) Preparation before processing: Same as the first embodiment.

[0051] 2) Rough cutting: same as the first embodiment.

[0052] 3) Semi-finishing: According to the characteristics of the processed surface, the corresponding steps of Embodiment 1 or Embodiment 2 are adopted accordingly.

[0053] 4) If there are physical and chemical performance requirements for the surface of the workpiece, surface quenching...

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Abstract

The invention relates to a processing method of a ferrous metal super-finishing surface, and the processing method is characterized in that: the end of a ferrous metal workpiece is directly cut by a diamond cutter on a precision or super-precision numerical control lathe; an excitation device is arranged to drive the cutter to vibrate ultrasonically, a spray device is arranged and carbon containing cutting fluid is prepared; and in processing, the diamond cutter cuts in the composite state of ultrasonic vibration and the protection of the carbon containing cutting fluid, so that the coupling of the cutter in physical and chemical wear reduction principles is realized, and the wear when the diamond cutter cuts ferrous metal is effectively reduced. According to the processing method of the ferrous metal super-finishing surface, rough cutting, half-precision cutting and final cutting procedures are carried out through an artificial polycrystalline diamond cutter, a chemical vapor deposition (CVD) thick film diamond cutter and a natural monocrystalline diamond cutter, so that the whole process is completed on the same set of equipment; the surface of the workpiece is nitrided before final cutting, so that the wear of the natural diamond cutter is further reduced; the method has good operability, the high-precision and high-efficiency processing with lower cost to the ferrous metal super-finishing surface is realized, and the method can be widely applied to aerospace, optics, mould industry and other fields.

Description

technical field [0001] The invention relates to a processing method for an ultra-precision profiled surface, in particular to a processing method for a ferrous metal ultra-precise profiled surface. Background technique [0002] Processing ultra-precision surface on ferrous metal materials (general surface roughness<Ra12.5nm, surface accuracy<0.5μm), has increasingly important applications in the fields of aerospace, optics and mold industry. For the processing of this type of ferrous metal ultra-precision surface, the current mainstream final processing process in the industry is generally grinding or polishing. Such as figure 1 As shown, the process route at this time is cutting, heat treatment, grinding and polishing in sequence, and the roughness after polishing can generally reach Ra2~5nm. Although this type of method can achieve good surface roughness, the processing cost is relatively high, the efficiency is low, and the precision consistency is not good during...

Claims

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Application Information

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IPC IPC(8): B23B1/00B23B27/00B23Q11/10C23C8/38
Inventor 李勇谢晓丹阿蒙杨锦荣
Owner TSINGHUA UNIV
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