JPS594243B2 - Machining head with cutting tool angle correction device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an apparatus that performs hole drilling etc. by rotating the cutting tool while making one revolution, and the angle of the rotating axis with respect to the revolving axis can be arbitrarily changed to freely adjust the angle of the cutting edge. The present invention relates to a processing head capable of correction.

Conventionally, in the machining head of a device that performs hole drilling etc. by revolving around the blade while rotating, it was not possible to adjust the angle of the cutting edge with respect to the revolving axis. In this case, the machining must be interrupted and the angle of the cutting edge must be polished to adjust the angle relative to the revolution axis.Also, if the rotation axis of the machining head becomes misaligned for some reason, it will not be possible to drill the specified hole. etc., it is troublesome to have to interrupt the machining and correct the error.

The present invention has been made in view of the above-mentioned drawbacks of conventional machining heads, and has been made for the purpose of providing a machining head that can easily and quickly adjust the angle of the cutting edge with respect to the axis of revolution without interrupting machining. The configuration will be explained below based on the embodiment shown in the figure.

FIG. 1 is a longitudinal sectional side view of a processing head according to the present invention, FIG. 2 is a front view seen from the left side of FIG. 1, and FIG. 3 is a
It is an A-line sectional view.

In FIG. 1, reference numeral 1 denotes a cylindrical machining head housing, the lower part of which is a sliding table 1 having a nut member 1b on the lower surface.
a and mounted on the sliding base 2, the nut member 1b is screwed into a feed screw 2a installed along the longitudinal direction inside the sliding base 2, and the feed screw 2a is It is connected to a servo motor 2b provided on the rear end side via a coupling 2c, and when the feed screw 2a is rotated by the motor 2b, the housing 1 is moved in the longitudinal direction (first direction) of the sliding base 2. It can be slid in the horizontal direction (in the left and right directions in the figure).

Thus, the motor 2b functions as a motor for advancing and retracting a cutting tool, which will be described later.

Reference numeral 3 denotes a cylindrical revolution main shaft which is rotatably inserted into the housing 1 via a bearing 4, and has a lid portion 3a on the front surface (left side in FIG. 1), and a central portion of the lid portion 3a. A wide guide groove 3b as shown in FIG. 2 is formed in the vertical direction, and the outer periphery of the rear end of this main shaft 3 (on the right side in FIG.
K is attached to the annular external gear 3c.

The gear 3c is connected to a servo motor 1c provided rearward on a mounting plate 1b provided at the rear end of the No-Ujifugu 1.
The motor 1c is meshed with the output gear 1d via the intermediate gear 1e, and transmits the rotational output of the motor 1c to the revolution main shaft 3.

Therefore, the motor 1c functions as a revolving motor for a cutting tool, which will be described later.

In FIG. 1, if and Ig are the front and rear covers of the housing 10, 3d is the holding nut of the bearing 4, and 3e is the external gear 3.
This is the mounting nut c.

Reference numeral 5 denotes a cylindrical slide housing inserted into the revolution main shaft 3, the outer diameter of which is smaller than the inner diameter of the main shaft 3, and a flange-like piece 5a provided vertically protruding from the front end. The rear surface side is formed as a sliding surface 5b that is tightly and loosely fitted into a guide groove 3b formed on the front side of the revolution main shaft 3.

Therefore, this slide housing 5 has the sliding surface 5b fitted into and supported by the guide groove 3b, so that the main shaft for revolution 3
The sliding surface 5b slides while being guided by the guide groove 3b, so that it is positioned coaxially or eccentrically with respect to the rotation center of the main shaft 30 for revolution, and the main shaft 3 for revolution
It is rotated as one.

Therefore, the sliding of the slide housing 5 is achieved by a screw thread 5 parallel to the sliding surface 5b screwed onto the lower flange-like piece 5a.
A male screw 5e rotated by a servo motor 5d provided on a mounting base 5f protruding from the lower end of the guide groove 3b at the front end of the revolution main shaft 3 is screwed into c, and the male screw 5e rotates. This is done by

That is, the sliding surface 5b moves up and down within the guide groove 3b by the left and right rotation of the male screw 5e, so that the center axis of the slide housing 5 is moved parallel to the rotation axis of the main shaft for revolution 30.

Therefore, the motor 5d that rotates the male screw 5e functions as a motor for moving the axis of the slide housing 5, in other words, a motor for moving the axis of the cutting tool described later, which adjusts the eccentricity between the axis of rotation and the axis of revolution.

Reference numeral 6 denotes a rotating main shaft which is equipped with an arbitrary cutting tool 7 on the front end so that it can be replaced via a chuck or the like, and the main shaft 6 is equipped with a bearing 8.
The quill 9 is rotatably housed in the cylindrical main shaft quill 9 via the quill 9.

Here, a taper tap is attached as the cutting tool 7.

The main shaft 6 for rotation is connected via a speed reduction mechanism 6b to a servo motor 6a coaxially attached to the rear end of the quill 9, so this motor 6a is used as a motor for rotation of the cutting tool 7. Function.

The main shaft quill 9, which is equipped with a main shaft 6 for rotation and a motor 6a for driving the main shaft 6, is loosely mounted in the above-mentioned slide no. , and two adjusting screws 1 whose rear ends are orthogonal to this swivel pin 10.
1.12 on the slide housing 5.

When the adjustment screws 11 and 12 are moved back and forth, the main shaft quill 9 is displaced in the rear end side or in the vertical direction around the swivel pin 10, so that the rotation main shaft 6 and the cutting tool 7 rotate 30 times on the revolving main shaft. This allows the axis of rotation to be at an angle with respect to the axis.

FIG. 4 shows a side cross section of the processing head of the present invention, showing a state in which the rotational main shaft 6 is eccentric with respect to the rotation center of the revolutional main shaft 30 and an angle is attached to one rotational axis of the rotational main shaft 6. , the eccentricity α of the rotation main shaft 6 becomes the depth of cut of the cutting tool in the workpiece 13, that is, the radius of the machined hole, and the deviation angle β becomes the correction amount of the cutting edge angle of the cutting tool 7.

Therefore, in order to cut a tapered hole or the like using the processing head of the present invention, the main shaft 6 for rotation is rotated by its motor 6a, the processing head housing 1 is advanced by the motor 2b, and the cutting tool 7 is inserted into the hole in the workpiece 13. 14, and further, while rotating the revolution main shaft 3 by its motor 1c, the slide housing 5 is moved by its moving motor 5.
This is done while changing the revolution radius, that is, the depth of cut of the cutting tool I by moving it by d.

Here, even if the cutting edge angle of the cutting tool 7 is reduced, it can be coped with by changing the angle of the rotation axis of the rotation spindle using the adjustment screw 11.12.

In this way, the processing head according to the present invention has an adjustment screw 1L.
12 to adjust the angle of the cutting tool 7 with respect to the rotational axis of the main shaft 30 for revolution to the desired angle around the swivel pin 10. It is convenient to be able to deal with the wear of the cutting tool by adjusting the angle of the cutting edge without the need for corner polishing, and the rotation radius of the cutting tool 7 is similar to that of the main axis for revolution 3 and Since it can be changed even during the rotation of the rotation main shaft 60, and this change can be made continuously, it is possible to cut a tapered hole while cooperating with the above-mentioned angle adjustment of the cutting blade.

Furthermore, when machining taper screws, the rotations of the servo motor 1c for revolution and the servo motor 2b for cutting feed are linked by numerical control etc. to maintain a constant pitch, and the rotation of the feed motor 2b and shaft feed motor 5d is It is possible to continuously reduce the radius of revolution by controlling these in relation to each other.

If the workpiece 13 changes and the cutting speed needs to be changed, this can be done immediately by controlling the feed motor 2b and the spindle motor 6a in a related manner.

The present invention is as described above, and is extremely useful as a kneader for a device in which a cutting tool rotates and revolves around its axis to perform hole drilling, etc.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional side view of an example of the processing head of the present invention, Fig. 2 is a front view of -flJ of the processing head of the invention seen from the left side of Fig. 1, and Fig. 3 is a line A-A in Fig. 2. The sectional view, FIG. 4, is a longitudinal sectional side view of the processing head of the present invention in a state where the main axis for rotation is eccentric and angled. 1... Processing head housing, 1c... Servo motor for revolution, 2... Sliding base, 2b... Servo motor for advancing and retreating, 3... Main shaft for revolution, 3b... Guide Groove, 3c... External gear, 4... Bearing, 5.
...Slide housing, 5a...Flanged piece, 5
b... Sliding surface, 5d... Servo motor for shaft center feeding, 5e... Male screw, 6... Spindle for autorotation, 7... Cutting tool, 8... Bearing, 9...・・Main shaft quill, 1
0...Swivel axis, 1L12...Adjustment screw.

Claims (1)

[Claims] 1 A cylindrical revolution spindle whose tip surface is formed into a guide groove orthogonal to the central axis is rotatably inserted into the cylindrical machining head housing, and a rear surface of the tip side is inserted into the revolution spindle. A cylindrical slide housing with a sliding part that fits tightly and loosely into the guide groove is inserted with the sliding part supported by the guide groove. A main shaft tile equipped with a rotatable main shaft equipped with a cutting tool is provided with a swivel pin oriented perpendicularly to the guide groove on the tip side of the tile, and a cam or adjustment screw oriented perpendicularly to the swivel pin on the rear end side of the tile. A machining head with a cutting tool angle correction device, characterized in that it is supported and inserted by a cutting tool.