JPH05337794A - Method and facility for tracing machining - Google Patents

Abstract

PURPOSE:To easily carry out tracing processing for complicated contours by chucking the shank of a rotary tool in which a rotatable journal bearing is provided at the tip of a cutting edge, and supporting the spindle to drive the tool shank with resilience so as to be movable in the direction vertical to the tool axis. CONSTITUTION:To chamfer the top part of a work 8 by reference to its surface, a cutting edge 1 is set to the specified dimensions telative to the periphery of a journal bearing 3. The dimension over the height for the work 8 is held fixed, and the spindle of the processing facility concerned is moved in conformity to X, Y program which was determined coarsely. When in this condition the processing facility is moved, the spindle draws a profile approximated to the tracing surface 9 of the work 8 substantially. The outer surface of the journal bearing 3 at the tip of the cutting edge moves while pressed by a spring 6 alongside the tracing surface 9. Therefore, the relation of the journal outer surface to the cutting edge 1 is held fixed, which permits performing the processing along the tracing surface even though it is a cast surface having poor surface precision.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing facility for profile processing and a processing method using the processing facility.

[0002]

2. Description of the Related Art Conventionally, when chamfering / paragraphing is formed into a shape that follows a complicated finish curved surface, the finished curved surface must be fixed on the machine where it is processed, or additional machining must be performed. Positioned and fixed with high precision in the equipment of, and processed with equipment with a high precision NC control device.

[0003]

Therefore, in the prior art, the equipment cost is high, and it takes time to design and mount the jig. Further, when the dimensional tolerance of the shape along the finished surface is strict, the accuracy of positioning and fixing the workpiece is required, and the equipment and the jig must be highly accurate. For the above reason
Since it was not possible to form a complicated shape by the profile processing, it was necessary to perform processing with high-precision NC control, and it took a long processing time and processing cost. In addition, it was not possible to perform highly accurate contour machining on a surface to be machined such as a cast surface where the shape accuracy varies.

The present invention is intended to solve the above-mentioned problems of the conventional example, and an object thereof is to make it possible to easily carry out highly precise profile machining of a complex shape.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention chucks a shank portion of a rotary tool cutting edge provided with a rotatable journal bearing at the tip of the cutting edge, and a main shaft for driving the chuck. It is supported by a spring property so as to be movable in the direction perpendicular to the tool axis. Further, the rotatable journal bearing is pressed against the workpiece, and the contour processing is performed with the surface as a reference.

[0006]

With the above-mentioned technical means, the cutting edge is moved while pressing it against the outer periphery of the journal bearing attached to the tip of the cutting edge on a workpiece having a complicated shape. It is easy and inexpensive to perform contouring with good accuracy along the surface. In addition, it is possible to easily and accurately perform machining when the dimensional tolerance of the shape along the finished surface is severe.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of the present invention. In the figure, 8 is a work piece, and this work piece is chamfered with high accuracy along the surface of 9 (for example, C0.1 ± 0.0).
An example of performing 5) will be shown.

The cutting edge 1 is fixed to the shank 2,
A cutting edge (milling cutter) having an angle of 45 ° to the tool axis (axis of shank) is set. A journal bearing 3 is installed on the tip side of the cutting edge 1 opposite to the shank portion 2. The present journal bearing is a ball bearing in this example, but may be a needle bearing, a roller bearing, or a slide bearing.

The other end of the shank 2 is connected to a chuck 7 at the tip of the processing equipment spindle 5. The main shaft is driven by a motor 10 and supported by a main bearing 4, and the main shaft and the main bearing system are supported by a spring 6 which is movable in a direction perpendicular to the axial direction.

When chamfering the upper end of the workpiece 8 with the surface of the workpiece 8 as a reference, the cutting edge 1 is set to a predetermined size with respect to the outer circumference of the journal bearing 3. Fix the dimension in the height direction (Z direction) with respect to the work piece and move the machining equipment spindle along the roughly determined X and Y programs (X axis
One of the Y axes is not shown. ).

The X and Y programs are set so that they are substantially close to the contour surface 9 of the workpiece. Even if the outer surface of the workpiece is a casting or the like and has a large variation from the reference profile, or if the reference coordinates are slightly displaced due to poor positioning and fixing of the workpiece to the jig, the program does not need to be corrected.

When the machining equipment is moved in this state, the spindle draws a profile which is substantially close to the contour surface 9 of the workpiece 8. Since the outer surface of the journal bearing 3 at the tip of the cutting edge moves along the profile surface 9 while pressing it with the spring 6, the positional relationship between the outer surface of the journal and the cutting edge 1 is fixed. Even if the casting surface is bad, it can be processed along the casting surface.

Further, even if the mounting accuracy of the workpiece is somewhat poor, it is possible to form a uniform and highly accurate chamfered shape as a whole. For this reason, it is not necessary to consider the accuracy of mounting the work piece to the jig, and the mounting time can be greatly reduced. Also, it is not necessary to demand extremely high accuracy of the mounting jig, and an inexpensive jig can be used. It will be possible.

As another embodiment, a three-axis structure is provided in which a shaft movably supported in a direction perpendicular to the tool shaft is supported with a spring property, a vertical Z-axis, and a rotary shaft on the workpiece side. Equipment is considered, and it becomes easier to process a workpiece with many curved surfaces.

Further, in the embodiment shown in FIG. 1, it is conceivable to provide an embodiment of a processing equipment which has a four-axis structure by providing a rotary shaft on the side of a workpiece to enable processing of a more complicated shape.

Further, the present processing method is effective for accurately chamfering a complicated shape profile such as chamfering of the wrap end face in a scroll compressor.

[0017]

As is apparent from the above description, according to the present invention, the shank portion of the rotary tool cutting edge having the rotatable journal bearing at the tip of the cutting edge is chucked, and the main shaft for driving the chuck is the tool shaft. And is supported by a spring property so as to be movable in the vertical direction. Further, the rotatable journal bearing is pressed against the workpiece, and the contour processing is performed with the surface as a reference. As a result, it is possible to easily perform a profile process having a complicated shape. Further, since the workpiece is used as a reference, high processing accuracy can be realized. Furthermore, it can be applied to casting surfaces where the contoured surface is inaccurate. and,
Since the positioning accuracy of the work piece is automatically corrected, there are various advantages such as shortening the mounting time and making the mounting jig inexpensive.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a tool and a processing method according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing a conventional contouring process.

[Explanation of symbols]

 1 Cutting Edge 2 Shank Part 3 Journal Bearing 4 Main Bearing 5 Processing Equipment Main Spindle 6 Spring 7 Chuck 8 Workpiece 9 Profile Surface

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshimi Yotsuya 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (3)

[Claims] 1. A processing facility in which a shank portion of a rotary tool having a rotatable journal bearing provided at a tip of a cutting edge is chucked and a spindle for driving the chuck is supported by a spring property so as to be movable in a direction perpendicular to the tool axis. 2. A chuck for a shank portion of a rotary tool having a rotatable journal bearing at the tip of a cutting edge, and a spindle for driving the chuck is supported by a spring property so as to be movable in a direction perpendicular to the tool axis. A contour processing method in which a free journal bearing is pressed against a workpiece and the surface is used as a reference. 3. The profile processing method according to claim 2, wherein the pressed surface is a non-processed surface such as forging, casting, or resin molding.