JPH07214404A - Cutting tool with minute adjustment mechanism - Google Patents

Abstract

PURPOSE:To prevent deterioration of a machined surface due to minute error in angle due to elastic deformation of a cutting tool when boring and finish cutting of a boring face are done by providing a tilting operation member which can tilt a shank in an upper end face at a tip of a holder when it is positioned on a connection face of the shank and holder and a tightening material is removed. CONSTITUTION:A knotched section 7 in which a wedge 6 can be fitted is provided in a shank 3, and a tilt position of the shank 3 can be changed depending on degree of fitting of the wedge 6 into the knotched section 7. When the shank 3 to be connected to a linear cutting blade 2 is moved and fixed by using the wedge 6, a bolt a and a screw are loosened, and the wedge 6 is fitted into the knotched section 7 to tilt the shank 3 due to elastic deformation and move the linear cutting blade 2 at a tip of the shank 3 to the workpiece side. Consequently, the relative position of a workpiece and the linear cutting blade 2 is changed, and the linear cutting blade 2 along a face to be machined is set. Then, the shank 3 is fixed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting tool with a fine adjustment mechanism for finishing and cutting a boring surface and a boring surface of a workpiece.

[0002]

2. Description of the Related Art In finishing cutting with an open working surface as shown in FIGS. 5, 6 and 7, the boring bar 31 to be used is not limited in thickness and a high-rigidity cutting tool 33 is used. be able to. Therefore, the nose R having a large curvature and the flat width W having a large plane portion are provided at the tip of the cutting edge of the cutting tool 33 to ensure the accuracy of the finished surface of the workpiece 30 and improve the finishing efficiency.

[0003]

However, in the boring cutting and boring cutting shown in FIG. 8 in which the machined surface is not open, the boring bar 31 to be used depends on the machining diameter 32 of the workpiece 30. Thickness is limited and its rigidity tends to be weak. Further, since the thickness of the boring bar 31 is limited, the cutting blade that is held by the boring bar 31 and processes the finished surface of the workpiece has a relatively small nose R bit 33.
However, a cutting tool 33 having a flat surface with a small flat portion is used to improve the efficiency of finish cutting.

At this time, when cutting with these cutting tools 33, a bending angle (δ) is generated in the boring bar 31 due to the cutting force generated when the workpiece 30 is cut, and the surface to be cut becomes a saw-toothed surface, and the surface accuracy is improved. It becomes difficult to secure the same, and the efficiency of finish cutting becomes impossible. The present invention has been made in view of this point, and an object thereof is to provide a cutting tool that can obtain high finished surface roughness and high cutting efficiency in finish cutting of boring or boring.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a shank for brazing or mechanically connecting a straight cutting edge at its tip end surface and a plurality of shanks on the side opposite to the straight cutting edge. A holder that joins at the top end surface with a fastening material, and a fold that is located on the joining surface of the shank and the holder with the fastening material removed,
A bite with a fine adjustment mechanism is characterized by comprising a tilting movement member capable of tilting the shank within the tip upper end surface of the holder.

[0006]

By moving the tilting movement member, the shank tilts due to elastic deformation, and the linear cutting edge at the tip of the shank moves to the workpiece side.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. A tool 1 with a fine adjustment mechanism shown in FIGS. 1 and 2 has a shank 3 for brazing or mechanically connecting a straight cutting edge 2 at its tip upper end surface, and a plurality of shanks 3 on the side opposite to the straight cutting edge 2 (this The holder 5 is connected to the tip upper end surface with four bolts 4 in the figure, and the shank 3 is positioned on the connecting surface of the shank 3 and the holder 5 and the bolt 4 is removed. It is composed of a tiltable wedge 6.

The shank 3 has a notch 7 into which the wedge 6 can be fitted, and the tilt position of the shank 3 is notched 7.
It can be changed depending on the degree of insertion of the wedge 6 into the. The wedge 6 is fixed to the shank 3 and the holder 5 by the screw 8 located at the head end of the wedge 6.

In the bite 1 with the fine adjustment mechanism constructed as described above, the movement and fixing of the shank 3 which is coupled to the linear cutting edge 2 by using the wedge 6 is performed as follows.

By loosening the bolt 4 and the screw 8 and inserting the wedge 6 into the notch 7, the shank 3 tilts due to elastic deformation, and the linear cutting edge 2 at the tip of the shank 3 moves to the workpiece side. As a result, the relative position between the workpiece and the linear cutting edge 2 changes, and the linear cutting edge 2 can be set along the machining surface. The shank 3 is fixed by tightening the bolt 4 and the screw 8.

FIG. 3 shows a second embodiment in which a shank 9 which is connected to the straight cutting edge 2 has a slit 10 which is cut out from the center of the upper end of the shank 9 toward the lower end, and the shank 9 which is orthogonal to the slit 10. Counterbore 11 provided at the upper end and counterbore 1
It is composed of a bolt 12 with a hole that is screwed into the screw 1. In this case, by tightening the holed bolt 12, the shank 9 is elastically deformed, and the straight cutting edge 2 can be tilted.

FIG. 4 shows a third embodiment, in which the shank 13 is provided on the upper end of the shank 13 which is orthogonal to the projecting portion 14 projecting from the center of the rear end portion of the shank 13 to the side opposite to the straight cutting edge 2. It is composed of a counterbore 15 and a bolt 16 with a hole that is screwed into the counterbore 15. In this case, a bolt with a hole 1
By tightening 6, the tip of the holed bolt 16 presses the protruding portion 14, whereby the shank 9 is elastically deformed, and the straight cutting edge 2 can be tilted.

[0013]

By using the cutting tool of the present invention, it is possible to prevent deterioration of the finishing surface due to a slight angular error due to elastic deformation of the cutting tool, which occurs when finishing cutting the boring and boring surfaces. High finished surface roughness and high cutting efficiency can be obtained.

[Brief description of drawings]

FIG. 1 is a plan view of a first embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a plan view of a second embodiment.

FIG. 4 is a plan view of a third embodiment.

FIG. 5 is a diagram showing a processing state when the processing surface is open.

FIG. 6 is a view showing a nose R of a bite.

FIG. 7 is a diagram showing a flat width W of a cutting tool.

FIG. 8 is a detailed view showing a conventional process for boring.

[Explanation of symbols] 1 Bit with fine adjustment mechanism 2 Straight cutting edge 3 Shank 4 Bolt 5 Holder 6 Wedge 7 Notch 8 Screw 9 Shank 10 Slot 11 Counterbore hole 12 Bolt with hole 13 Shank 14 Projection hole 15 Counterbore hole 16 hole bolt

Claims (3)

[Claims] 1. A shank for brazing or mechanically joining a straight cutting edge at its tip upper end surface, a holder for joining the opposite straight cutting edge side of the shank with a plurality of fastening materials at its tip upper end surface, and a shank. A bite with a fine adjustment mechanism, characterized in that it is composed of a tilting movement member which is located on the coupling surface of the holder and has a fastening material removed, and which can tilt the shank within the tip upper end surface of the holder. 2. A bite with a fine adjustment mechanism, wherein the tilting movement member in claim 1 is composed of a wedge. 3. A bite with a fine adjustment mechanism, wherein the tilting movement member according to claim 1 is composed of a bolt.