JPS62124806A - Fixing method for cutting edge tip and tool - Google Patents

Abstract

PURPOSE:To enable a cutting edge to be used as a throw away type, by providing cutting edge insertion holes in a base plate and inserting the cutting edge into these holes while a gradient hollow screw into a gradient stud tap hole to be tightened so that the cutting edge is pressed and fixed to the base plate. CONSTITUTION:Cutting edge insertion holes 3 are provided in the internal peripheral part of a doughnut-shaped circular plate 1. Cutting edges 2 are inserted into these holes. A flexible part 11 of the base plate forms a slit 6, having a gradient stud tap hole 4, to be placed approaching the insertion hole 3. The flexible part 11 flexes in the direction of an arrow head (a) in the drawing by inserting a gradient hollow screw 5 into the tap hole 4 to be tightened, and the cutting edge 2 is pressed and fixed to a nonflexible part 12. Accordingly, the cutting edge 2 is removably mounted to the insertion hole 3.

Description

[Detailed description of the invention] A cutting tip is inserted into a relatively thin tool substrate such as a parting tool or a circular saw, and fixed using a unique method. The present invention relates to a method for fixing a cutting edge tip to prevent the tip from detaching from a substrate.

By using this method, it is possible to easily manufacture thin indexable type (disposable) tools, which has been considered difficult in the past.

A detailed explanation will be given below based on usage examples. The figure above shows this method applied to a donut-shaped internal saw blade.Re-sharpening the cutting blade is very troublesome for this type of tool, so it is convenient to use a slow-way type (the cutting blade is disposable). However, there was no conventional method for fixing the cutting blade to a thin substrate that had a simple structure and functioned well, and the cutting blade was generally fixed by brazing, which caused wear and tear. It took time and effort to resharpen the blade, resulting in high costs. Therefore, there are parting tools on the market that use a method in which the upper and lower surfaces of the cutting blade are formed into a slope and are fixed by driving into a similarly sloped hole in the board using a mallet, etc. The current situation is that it is not used extensively except by a few customers because it detaches due to expansion and is not functionally sufficient.

The present invention covers the above-mentioned defects and fixes the cutting blade functionally.The cutting blade is inserted into the cutting blade insertion hole 3 formed from the inside of the donut-shaped substrate 1 shown in the figure, and the cutting blade is inserted into the slit 6. By inserting and tightening the gradient hollow screw 5 into the gradient adjustment tap hole 4 provided at the center of the board, the board flexible part 11 presses and fixes the flexible cutting blade 2 against the board non-flexible part 12 in the direction of arrow A. The slope tapped hole 4 and the slope hollow screw 5 are machined so that the end surface of the sloped hollow screw 5 and the board surface are on the same plane when fastened, or the screw end surface is slightly retracted from the board surface, and the end surface of the sloped screw 5 is machined during cutting. It does not interfere with the workpiece, and since it is hollow, it has a certain degree of elasticity, so it absorbs load vibrations.
This has the effect of preventing the substrate from becoming distorted due to detachment of the cutting edge or thermal expansion. Since the through hole of the gradient hollow screw is formed into a square shape, a square wrench can be used to tighten and loosen the screw, and the cutting blade can be attached and detached freely.

A cutting blade fixing method and a doughnut-shaped inner circumferential saw blade are characterized in that the cutting blade 2 is compressed and fixed in this way.

[Brief explanation of drawings]

An enlarged cross-sectional view taken in the direction of arrow A', and the third figure is an enlarged view taken in the direction of arrow B in the O diagram. 1... Donut-shaped disc 2... Cutting blade 3... Cutting blade insertion hole 4... Gradient entry tap hole 5... Gradient hollow screw 6... Slit 7... Concave pilot groove 8 ...Convex protrusion 9...Tool mounting hole 10...Board outer periphery insert part 11...Board flexible portion 12...Board non-flexible portion 13...Chip chip groove Fig. 2

Claims (1)

[Scope of Claims] 1. A flexible portion and a slit are provided above the cutting blade insertion hole in a circular substrate or a parting tool shank, and a slope tapped hole is provided in the center of the slit, and the cutting blade is inserted into the cutting blade insertion hole. A cutting blade fixing method characterized by inserting and tightening a gradient hollow screw into a gradient tap hole, thereby elastically deforming a flexible portion relative to a non-flexible portion and compressing and fixing the upper surface of the cutting blade. 2 Donut-shaped circular substrate (1) A cutting blade insertion hole (3) with smooth upper and lower surfaces on the inner periphery and a spigot groove (7) for regulating the side of the cutting blade on the lower center surface, and a slit (6) with a slope in the center of the slit. A cutting blade (2) is provided with a tap hole (4), a chip groove (13), etc., and has a convex protrusion (8) for side regulation on the lower surface.
), and insert and tighten the gradient hollow screw (5) into the gradient vertical tap hole (4) to elastically deform the flexible part (11) relative to the non-flexible part (12), and the cutting blade (2) A donut-shaped inner peripheral saw blade that is compressed and fixed and has mounting holes (9) evenly distributed near the outer periphery.