Disposable cutting insert for boring cutter

a cutting insert and boring cutter technology, which is applied in the direction of cutting inserts, wood boring tools, manufacturing tools, etc., can solve the problems of long manufacturing time and higher cost, high cost of internal micro-lender burnishing tools, and naturally high manufacturing cos

Active Publication Date: 2008-07-31
CHANG SC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

1. During the manufacture, it is necessary to change the internal microller burnishing tool, and thus this method incurs a longer manufacturing time and a higher cost.
2. The cost of the internal microller burnishing tool is high, and thus the manufacturing cost is naturally high as well.
3. After the internal microller burnishing tool has been used for many times, bits produced by the extrusion will be accumulated in the roll beads (cylinder), and it is necessary to clean the tool from time to time. However, a small amount of bits will remain, and the remained bits will be extruded and adhered onto the surface of the work piece and produces a friction with the surface that may blacken the manufacturing surface.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022]Referring to FIGS. 1 and 2 for the present invention, a disposable cutting insert 10 for a boring process is comprised of a polygonal body, and defined by an upper plane 11, a lower plane 12 and a plurality of side surfaces 13, 14, 15, 16, wherein a stepped hole 17 penetrates a center position of the disposable cutting insert 10, and each side surface 13, 14, 15, 16 has an appropriate inclination α, β, and the inclination α of the side surface 13, 14 is approximately equal to 11°, and the inclination β of the side surface 15, 16 is approximately equal to 7°, and the upper plane 11 is a cut plane of a cut work piece that produces iron bits, and the lower plane 12 is provided for supporting, and a long blade edge 181 (or the long cutting edge) is formed between the upper plane 11 and the side surface 14, and a cutting edge (the corner radius cutting edge) 19 is formed between two adjacent side surfaces 13, 14, and the long blade edge 18 is substantially a large arc blade edge. R...

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PUM

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Abstract

A disposable cutting insert for a boring cutter can reduce the roughness of a cut surface and achieve a mirror-like surface effect. The disposable cutting insert has a long curved blade edge, and the radius vertex of the long blade edge is deviated slightly from an external side of a vertex of the radius of cutting edge. A short curved blade edge is formed between the radius arc vertex and the radius arc vertex of the cutting edge. The vertical distance of the short curved blade edge is greater than the feed rate. The cutting edge cuts the work piece and the short curved blade edge can scrape a small size of material precisely for scraping the peak cut by the cutting edge and lower the height of the peak, so as to lower the surface roughness, and produce a mirror-like surface for an internal periphery of a bored hole.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a disposable cutting insert for a boring cutter, and more particularly to a disposable cutting insert used for the precision boring manufacture of a metal work piece that requires a mirror-like surface for a bored surface.BACKGROUND OF THE INVENTION[0002]In general, a conventional internal boring manufacture that requires a mirror-like surface effect on the surface roughness has to go through three cutting tools: a coarse boring cutter, a fine boring cutter and an internal microller burnishing tool. The coarse boring cutter carries out a coarse boring operation and reserves ψ0.2˜0.3 mm for a fine boring manufacture, and the fine boring cutter completes a fine boring operation by a feed rate of f=0.04˜0.1 mm / rev and reserves ψ0.02˜0.04 mm for the polish by the internal microller burnishing tool, such that a mirror-like surface effect with a surface roughness up to Rmax=0.04˜1.2 μm can be achieved. This manufacturing method ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B27G15/00
CPCB23B27/007B23B27/145B23B29/02B23B2200/0423B23B2200/085B23B2200/123Y10T408/90B23B2200/202B23B2200/207B23B2200/208Y10T407/24Y10T407/235Y10T407/23B23B2200/201
Inventor CHANG, HSIN-TIEN
Owner CHANG SC
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