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Non-instantaneous-pole envelope grinding method of spiral curved surface of superfine milling cutter

A micro-milling cutter, helical surface technology, applied in milling cutters, parts of grinding machine tools, grinding/polishing equipment, etc.

Inactive Publication Date: 2014-06-18
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the precise manufacturing of micro-helical drilling and milling cutters still faces great challenges, and the processing methods to improve the shape accuracy of micro-tools need further research

Method used

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  • Non-instantaneous-pole envelope grinding method of spiral curved surface of superfine milling cutter
  • Non-instantaneous-pole envelope grinding method of spiral curved surface of superfine milling cutter
  • Non-instantaneous-pole envelope grinding method of spiral curved surface of superfine milling cutter

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] (1) According to the geometric angle parameters of the helical edge of the micro-milling cutter, the optimal geometry and installation angle of the grinding wheel are designed. Through numerical calculation, the non-instant center envelope of the simulated grinding wheel movement is developed into a helical surface section, and the grinding process is carried out. optimization.

[0014] (2) When the groove is processed, the center of the large end of the grinding wheel moves from the origin position to the initial position C when the x, y, z and w axes move according to the positions in Table 1. The grinding wheel keeps rotating, and the workpiece performs a spiral motion. When the workpiece moves from the initial position to the end position along the u-axis and A-axis, the complete groove can be machined. In Table 1, θs and θf are the change angles of the A-axis rotation when machining the flank groove and the flank, respectively, compared to the machining of the chi...

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Abstract

The side edge spiral curved surface of a superfine spiral end milling cutter is of a complex structure and is difficult to machine. A traditional grinding method cannot ensure machining accuracy of a part of a long and thin structure. The invention relates to a non-instantaneous-pole envelope grinding method of the spiral curved surface of the superfine milling cutter. When a cutter is ground, the shape and installation angle of a grinding wheel directly affect the shapes of the front corner, the rear corner and a chip groove of the side edge of the superfine milling cutter. The non-instantaneous-pole envelope principle and the homogeneous coordinate transform method are applied, a mathematical model is obtained by sectioning the spiral curved surface end generated by the standard conical grinding wheel in an envelope mode, and the method can be used for analyzing the influence on the geometric angle and the groove shape of the side edge of the superfine milling cutter from the installation angle and shape of the grinding wheel; in the model, the tilt angle of the grinding wheel is larger than the coangle of the spiral angle, the contact area decreases, and grinding force is reduced; the front cutter face, the rear cutter face and the chip groove are ground multiple times in an envelope generating mode, and the accuracy of geometrical parameters of the superfine milling cutter can be ensured. The non-instantaneous-pole envelope grinding method is suitable for accurate machining of superfine spiral structures with the high length-diameter ratio.

Description

technical field [0001] The invention relates to a non-instant center enveloping grinding method for a helical curved surface of a micro milling cutter. According to the processing characteristics of the spiral groove structure on the high aspect ratio cylindrical structure, through the non-instant center envelope principle and the homogeneous coordinate transformation method, using the relative motion and spatial relationship between the grinding wheel and the workpiece, the standard grinding wheel envelope is developed to form a small diameter cylinder The mathematical model of the upper spiral surface realizes the high-precision machining of such parts. [0002] The invention is mainly used for the precision machining of the helical curved surface on the structure with high length-to-diameter ratio, and can provide numerical simulation for the precise machining of the helical curved surface of the fine drilling and milling cutter, and guide the selection of the grinding whee...

Claims

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Application Information

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IPC IPC(8): B24B19/02
CPCB24B3/021B24B49/02
Inventor 刘志兵何理论王西彬周天丰梁志强解丽静焦黎
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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