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Contour milling cutter and manufacture method of cutting part thereof

A form milling and blade technology, which is applied in the field of new form milling tools, can solve the problems of blade defect, blade fracture, and difficulty in industrial production, and achieve the effect of reducing material costs

Active Publication Date: 2013-01-02
HITACHI TOOL ENG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because it is made of cemented carbide with low toughness, accidents such as fracture of the blade and chipping of the blade may occur, and it is difficult to realize it in industrial production.

Method used

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  • Contour milling cutter and manufacture method of cutting part thereof
  • Contour milling cutter and manufacture method of cutting part thereof
  • Contour milling cutter and manufacture method of cutting part thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0104] A form milling tool with a cutting edge made of cemented carbide as an example of the present invention and a form milling tool with a cutting edge made of high-speed tool steel as a previous example were produced, and their performances were compared after cutting.

[0105] The specifications of the form milling cutter (Christmas tree milling cutter) manufactured for the above performance comparison are as follows. In addition, the numbers of the following examples of the present invention and previous examples are described with serial numbers including both.

[0106] As the example of the present invention and the previous examples, for having the same shape as figure 1 The shown Christmas tree milling cutter for rough machining of three convex parts (hereinafter simply referred to as "milling cutter") has its blades made of cemented carbide and high-speed tool steel, respectively. An example of the present invention is a cemented carbide blade, which is produced by...

Embodiment 2

[0114] The time required for grinding the blade was compared according to the different processing steps of the tool blade manufacturing method.

[0115] The sequence of the tool manufacturing process of the example 2 of the present invention used in embodiment 2 is as follows Figure 13 As shown in (a), after the manufacture of the green body, pre-sintering (calcination), sub-back processing, sintering, center polishing, centering interface polishing, bolt polishing, connection with the shank, cylindrical polishing, Groove processing and main rear processing, and finally the finished product. The sequence of the tool manufacturing process in the previous example 2 is as follows Figure 13 As shown in (b), after the production of green body, pre-sintering (calcination), sintering, center polishing, centering joint polishing, bolt part polishing, connection with shank, cylindrical part polishing, edge groove processing, The main rear surface processing and the removal process...

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PUM

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Abstract

The invention provides a cutting part integer as a hard solid core body and a contour milling cutter capable of reducing grinding processing load and breakage risk of the cutting part. The integer of the cutting part (1) is formed by hard alloy. The cutting part (1) is detachably connected with a handle (3) by a connection part (2) to obtain the contour milling cutter. A minor flank (7) connectedwith a main flank (9) of the cutting part (1) is used as the green compact processing surface. After manufacturing the green compact, the very part of the cutting groove is kept and the minor flank with smaller diameter than that of the main flank is formed and after casting the green compact to obtain the casting body, the a processing cutting groove (10) and the main flank (9) are grined at theleast at the concavity part of minimum diameter.

Description

technical field [0001] The present invention relates to a new form milling tool whose blade is entirely made of cemented carbide, and the cemented carbide blade with deep groove cutting edge is detachably connected to the shank through the connecting part, and the hardened A method of manufacturing a blade portion of a form milling tool made of an alloy. Background technique [0002] Among cutting tools, Christmas tree milling cutters and dovetail groove milling cutters are representative cutters for forming milling tools with a large diameter difference in the axial direction of the cutting edge from the cutting edge and deep grooves. The Christmas tree milling cutter is a tool for machining the Christmas tree-shaped connection grooves for attaching the turbine blades to the rotating shaft (impeller). This knife has a grooved edge corresponding to the shape of the groove for the Christmas tree connection. That is, the tip diameter of the outer peripheral cutting edge of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23C5/20
Inventor 金本浩
Owner HITACHI TOOL ENG LTD