JP3100882U - Metal saw for circular shaft - Google Patents

Abstract

[PROBLEMS] When the cutting edge is worn, the bite of the cutting edge is deteriorated, the degree of groove symmetry after machining of the split groove is deteriorated, and the width of the central groove on the side where the tool enters is widened. To provide a metal saw for a circular shaft with improved centripetality by preventing the occurrence of problems such as occasional clearance and inability to smoothly operate a control valve.
The cutting edges of the tools are all set at the same inclination angle α, and the inclination directions of the cutting edges are alternately changed so that the cutting edges are not applied to the arc vertices 6 of the circular shaft 1 at first, and each cutting edge is located on both sides 7 from the center of the arc. To improve the centripetality of the tool when machining the groove 3.
[Selection diagram] FIG.

Description

Detailed description of the invention

The present invention is an intake air control device

FIG.

The present invention relates to the shape of the cutting edge of a metal saw for processing the split groove 3 of the circular shaft 1 holding the control valve 2 of FIG.
This is a device for cutting the shape of the cutting edge of a metal saw for improving the accuracy of the split groove 3 of the circular shaft 1 so that the split groove 3 of the circular groove 1 can be accurately machined and the operation of the control valve 2 can be performed smoothly and accurately.

  Conventionally, metal saws for grooving use a standard blade type depending on the material and shape of the work material.

FIG.

And special blade type

FIG.

FIG.

We have tried to ensure the accuracy of the split groove 3 of the circular shaft 1.

Issues that the device is trying to solve

  When machining the split groove 3 of the circular shaft 1 with a metasaw, the cutting edge of the metal saw first hits the arc vertex 6 of the circular shaft 1 to start the processing, complete the split groove 3 into which the control valve 2 is inserted, and finish the processing. The bite of the cutting edge deteriorates with respect to the machined portion of the circular shaft 1 due to the wear of the cutting edge, etc., so that the tool enters obliquely and the degree of symmetry of the groove is deteriorated. Machining defects such as widening of groove width occur.

Means for solving the invention

  In order to improve the machining accuracy of the split groove 3 of the circular groove 1, the position where the cutting edge of the metal saw first hits is changed from the circular vertex 6 of the circular shaft 1 to both sides 7 shifted from the circular center to improve the centripetality of the tool. .

The angle of inclination α of the metal saw blade is set to 6 ° and the direction of inclination is alternately reversed, so that the number of blades is plural (56 in this embodiment). A metal saw was manufactured so as not to hit the arc vertex 6 of the shaft 1 but from both sides 7 and a processing test was performed.

Check the effect

As a result of machining the split groove 3 of the circular shaft 1 made of stainless steel, which is difficult to cut,

FIG.

Satisfies the standard value without taking any measures such as tool position correction until the tool life in the devised cutting die 5. With the conventional standard cutting die 4, the tool position is corrected four times near the upper limit of the groove symmetry specification. I have. Groove width

FIG.

The blade die 5 devised also has a good result in which the dimensional change of the groove width at the center portion on the tool insertion side is small as compared with the conventional standard blade die 4.

It is sectional drawing of an intake air control apparatus. It is a side view of a circular axis. It is sectional drawing of a circular axis. FIG. 4 is a catalog of the shape of a blade edge of a standard blade type metal saw. It is a cutting edge shape catalog figure of an alternating blade type metal saw. FIG. 3 is a catalog diagram of the shape of a blade edge of a high / low blade type metal saw. FIG. 4 is a schematic diagram in which a blade edge of a standard blade-type metal saw and a circular shaft first strike. It is a schematic diagram in which the blade tip of the devised blade type metal saw first hits the circular shaft. It is a processing test result of the groove symmetry with the devised blade type and the standard blade type. It is a processing test result of the groove width with the devised blade type and the standard blade type.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Circular shaft 2 Control valve 3 Circular groove of circular shaft 4 Standard blade type tool 5 Devised blade type tool 6 Position where standard blade type tool and circular shaft first hit 7 Devised blade type tool and circular shaft Position where the first hit α The inclination angle of the metal saw blade

Claims (1)

  The cutting edges of the grooving tools are all inclined at the same angle α, and the inclination directions of the cutting edges are alternately changed. The arc is not applied to the apex 6 of the circular shaft 1 for holding the control valve 2 of the intake air control device at first. A metal saw for a circular shaft having a plurality of blades formed such that each of the blade edges hits both sides 7 from the center of the circle.

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