JPH09285933A - Center height adjusting device between edged tool and workpiece and method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily adjust center height of an edged tool, whose tip is formed into a rotation symmetric shape, with high precision by forming a chuck part with a workpiece rotating means base and providing a measuring means measuring a distance from an optional reference point clamped in a workpiece rotating means to the edged tool. SOLUTION: By means of a workpiece chuck 2, a workpiece rotation shaft is made to coincide with that of a θ rotation shaft 4 on the θ rotation shaft 4, and a workpiece or a center height adjusting device 1 is held. In an optional position, a reference face of the center height adjusting device 1, in other words, a distance L1 from the end face of a non-contact type length measuring sensor 16 to the surface of an edged tool 15, is measured. Then, the θrotation shaft 4 is rotated by 180 degrees, and a distance L2 between the reference face of the center height adjusting device 1 and the edged tool 15 is measured. Subsequently, a spindle unit 13 and the edged tool 15 are moved upward/downward by means of Z-axis positioning means 12 so that a difference between the distances L1, L2 is brought close to 0. When the difference between the distances L1, L2 becomes 0, the edged tool 15 and workpiece chuck 2, in other words, a center of the workpiece rotation shaft, coincide with each other, and center height adjustment is finished.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for performing center alignment of a cutting tool and a work of a multi-axis control machine such as a grinding machine or a lathe, that is, so-called center height alignment, with high accuracy and simplicity.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, FIG. 6 and FIG. 7, for adjusting the core height of a multi-axis control machine such as a grinding machine or a lathe, a dummy work 17 is held on a work chuck 2 and a cutting tool 15 is used. First, the tip shape of the cutting tool 15 is transferred to the dummy work 17 to form a transfer mark 18. Next, the θ rotation shaft 4, that is, the work chuck 2 is rotated 180 degrees, and the tip shape of the cutting tool 15 is transferred to the dummy work 17 in the same manner as described above to form a transfer mark 19. A general method is to measure the distance L3 between the center lines of the transfer traces 18 and 19 and repeat the transfer operation so that the distance L3 becomes zero.

[0003]

When the accuracy of core height alignment is low, not only the shape accuracy of the work accuracy of the work is affected, but also the life of the machine body and the cutting tool is adversely affected. Are known.

However, in the center height adjusting method described in the above-mentioned prior art, there is an error in the measurement of the distance L3, the dummy work 17 is removed from the work chuck 2 when measuring the distance L3, and the dummy is again measured after the measurement. It is necessary to have skill to perform highly accurate core height alignment such as an attachment error when the work 17 is gripped by the work chuck 2, and an apparatus and a method capable of performing the core height alignment with ease and high accuracy have been desired.

Therefore, the present invention solves such a problem, and particularly in the case of core height adjustment, an apparatus and method for performing core height adjustment with high accuracy and simplicity, particularly when a blade tool having a rotationally symmetric tip is used. To provide.

[0006]

The present invention achieves the above-mentioned object. It is an X-axis positioning means for performing linear positioning in the horizontal direction, and a Y-axis for performing linear positioning in the horizontal direction orthogonal to the X-axis positioning means. Positioning means, a rotationally symmetrical cutting tool, a spindle shaft having means for mounting the cutting tool on a shaft, means for rotating the spindle shaft, and the spindle joined to the X-axis positioning means or the Y-axis positioning means. A Z-axis positioning means for positioning the shaft portion in the vertical direction, and an angle indexing function for holding and rotating the work, which has a rotary shaft joined to the X-axis positioning means or the Y-axis positioning means in a direction orthogonal to the spindle axis. In the device for aligning the center height of the cutting tool and the work, which comprises a multi-axis control machine having the work rotating means, Has a chuck portion made of rotating means criteria, the gripped by the workpiece rotating means, characterized in that it comprises a measuring means for measuring the distance from an arbitrary reference point to the cutting tool.

Further, an X-axis positioning means for linearly positioning in the horizontal direction, a Y-axis positioning means for linearly positioning in the horizontal direction orthogonal to the X-axis positioning means, a rotationally symmetrical cutting tool, and the cutting tool are provided. A spindle shaft having means for attaching to the shaft; a means for rotating the spindle shaft; a Z-axis positioning means joined to the X-axis positioning means or the Y-axis positioning means for vertically positioning the spindle shaft portion; Using a multi-axis control machine having X-axis positioning means or work rotating means joined to the Y-axis positioning means and having a rotation axis in a direction orthogonal to the spindle axis and having an angle indexing function for holding and rotating the work. In a method of aligning the core height of a cutting tool and a work, having a chuck portion made on the basis of the work rotating means, A device for aligning the core height of the cutting tool and the work, which is gripped by the work rotating means and has a measuring means for measuring the distance from the arbitrary reference point to the cutting tool, is used to rotate the device by the work rotating means. It is characterized in that the distance between the arbitrary reference point and the cutting tool at the time of normal rotation and at the time of reverse rotation is measured and the difference between the respective measured distances is obtained.

[0008]

According to the apparatus and method for aligning the center height of a cutting tool and a work of the present invention, X-axis positioning means for performing linear positioning in the horizontal direction and Y-axis positioning means for performing linear positioning in the horizontal direction orthogonal to the X-axis positioning means. A cutting tool having a rotationally symmetric shape, a spindle shaft having a means for mounting the cutting tool on a shaft, a means for rotating the spindle shaft, and the spindle shaft portion joined to the X-axis positioning means or the Y-axis positioning means. To position the machine vertically
A shaft positioning means and a work rotating means joined to the X-axis positioning means or the Y-axis positioning means and having a rotation axis in a direction orthogonal to the spindle axis and having an angle indexing function for holding and rotating the work. An apparatus for aligning the core heights of a cutting tool and a work, which comprises an axis control machine, and a method for aligning the center heights of the cutting tool and the work by using such a multi-axis control machine, having a chuck portion made on the basis of the work rotating means. Then, using a device that matches the core height of the cutting tool and the work, which is gripped by the work rotating means and has a measuring means for measuring the distance from an arbitrary reference point to the cutting tool, and the device is arbitrarily operated by the work rotating means. 180 degrees forward and reverse from the rotational position of, the distance between the arbitrary reference point and the cutting tool at the time of forward rotation and reverse rotation is measured, and the difference between the measured distances is obtained. By aligning the center i.e. the center height of over click the center and cutting tool, it is possible to match the considerably high precision and simple center height compared to the conventional method.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings, but the invention is not limited thereto.

FIG. 1 is a side view of the multi-axis control machine of the embodiment and the center height adjusting device gripped by a work chuck, and FIG. 2 is an enlarged view of the center height adjusting device and the cutting tool portion of the embodiment.

In FIG. 1 and FIG. 2, 1 is a core height adjusting device of the present invention, and 16 is a length measuring sensor. Reference numeral 5 is an X-axis positioning means for performing linear positioning in a substantially horizontal direction, and 6 is a motor and an encoder for driving the X-axis. Reference numeral 8 is a Y-axis positioning means for performing linear positioning in a substantially horizontal direction orthogonal to the X-axis positioning means 5, and 9 is a Y-axis driving motor and encoder. Reference numeral 13 is a spindle unit for incorporating a motor (not shown) for rotating the cutting tool, 14 is a spindle shaft, and 15 is a shape error of +0.00.
The cutting tool has a radius of curvature of 5 to -0.005 [mm] and 2 [mm]. The blade 15 is attached to the shaft end of the spindle shaft 14 such that the rotation axis of the spindle shaft 14 and the rotation axis of the blade 15 coincide with each other. Reference numeral 12 is a Z-axis positioning means capable of positioning in a substantially vertical direction. The spindle unit 13 and the cutting tool 15 are the Z-axis positioning means 1
Since it can be moved by 2, it is possible to perform vertical positioning in accordance with the height of a work (not shown) or the center height adjusting device. Reference numeral 11 is a Z-axis driving motor and encoder.

Although not shown, X-axis positioning means 5, Y-axis positioning means 8 and Z-axis positioning means 12
Has a built-in linear scale as position detecting means.

Next, reference numeral 4 has a rotary shaft on the X-axis positioning means 5 in a substantially horizontal direction orthogonal to the rotary shaft of the spindle shaft 14, and it is possible to control the angular position for holding and rotating the work (not shown) or the center height adjusting device 1. It is a possible θ rotation axis. A work chuck 2 holds the work or the center height adjusting device 1 on the θ rotation shaft 4 by aligning the rotation shaft of the θ rotation shaft 4 with the rotation shaft of the work.

Next, a method of adjusting the core height with these configurations will be described.

First, the spindle shaft 14 is rotated at an appropriate number of revolutions, and at the position of the cutting tool 15 and the center height adjusting device 1 shown in FIG. The distance L1 from to the surface of the cutting tool 15 is measured. Next, from the position shown in FIG.
Rotate degrees. This state is shown in FIG. In the state shown in FIG. 4, similarly to the above, the distance L2 between the reference surface of the center height adjusting device 1 and the cutting tool 15 is measured.

Next, the spindle unit 13 and the cutting tool 15 are vertically moved with respect to the center height adjusting device by the Z-axis positioning means 12 so that the difference between L1 and L2 approaches zero. L1 is measured by measuring L1 and L2 and vertically positioning using the Z-axis positioning means 12.
When the difference between L2 and L2 becomes zero, the center of the cutting tool 15 and the center of the work chuck 2, that is, the center of the work rotation shaft are aligned with each other, and the center height alignment is completed.

On the other hand, the conventional method is shown in FIGS. 5, 6 and 7. First, an appropriate amount of incision is made by the Y-axis positioning means 8, and the tip shape of the cutting tool 15 is cut and transferred to the dummy work 17 to form a transfer mark 18 as shown in FIG. Next, the θ rotation shaft 4 is rotated 180 degrees from the position shown in FIG. 5 and the tip shape of the cutting tool 15 is cut and transferred to the dummy work 17 in the same manner.
Number 9 This state is shown in FIG.

Then, transfer marks 18 and 19 are cut and transferred to the dummy work 17, as shown in FIG. Figure 7
The core height was adjusted by measuring the length of L3 shown in (3) and moving relatively by half the length of L3.

As a result of comparing the accuracy of the core height between the core height adjusting method shown in the embodiment and the conventional method, it was confirmed that the core height adjusting was performed with about 20 times higher accuracy than the conventional method. In addition, the machining accuracy of the work became 5 times higher than the conventional one, and it was confirmed that the machining accuracy was improved.

In this embodiment, a cutting tool having a radius of curvature of 2 [mm] was used, but it is needless to say that the radius of curvature is limited to a specific radius as long as it has a rotationally symmetrical shape.

Further, in this embodiment, the non-contact type sensor was used as the length measuring sensor, but it is needless to say that the contact type sensor can be used to perform highly accurate center height alignment.

[0022]

As described above, according to the center height aligning apparatus and method for the cutting tool and the work of the present invention, the X-axis positioning means, the Y-axis positioning means, the rotationally symmetrical cutting tool, and the cutting tool as the axis. A spindle shaft for mounting and rotating, a Z-axis positioning means for positioning the spindle shaft portion in a vertical direction, and a work rotating means having a rotation axis in a direction orthogonal to the spindle shaft and having an angle indexing function for holding and rotating the work. A device for aligning the core heights of a cutting tool and a work, which comprises a multi-axis control machine having the method, and a method for performing the center height alignment of the cutting tool and the work using such a multi-axis control machine, in which a chuck part made on the basis of the work rotating means is used. Which is held by the work rotating means and has a measuring means for measuring the distance from an arbitrary reference point to the cutting tool, and aligns the center height of the cutting tool with the work. That using the apparatus, the apparatus was 180 ° forward and reverse rotation from an arbitrary rotation position by the workpiece rotating means,
By measuring the distance between the arbitrary reference point during normal rotation and reverse rotation and the cutting tool, find the difference between the measured distances, and match the center of the work with the center of the cutting tool, that is, the core height. Compared with the method, there is an effect that the core height can be adjusted significantly more accurately and easily.

[Brief description of drawings]

FIG. 1 is a side view of a multi-axis control machine and a center height adjusting device gripped by a work chuck according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a core height adjusting device and a cutting tool portion according to an embodiment of the present invention.

FIG. 3 is a side view showing the measurement of the distance between the reference surface of the center height adjusting device and the surface of the cutting tool.

FIG. 4 is a side view showing the measurement of the distance between the reference surface of the center height adjusting device and the surface of the cutting tool at a position where the θ rotation axis is rotated 180 degrees from the position shown in FIG.

FIG. 5 is a side view showing a transfer of a cutting tool tip shape to a dummy work by a conventional core height adjusting method.

FIG. 6 is a side view showing transfer of a cutting tool tip shape onto a dummy work at a position obtained by rotating a θ rotation shaft by 180 degrees from the position shown in FIG. 5;

FIG. 7 is a diagram showing a transfer trace when the tip shape of the blade shown in FIGS. 5 and 6 is transferred to a dummy work and the tip shape of the blade is transferred to the workpiece.

[Explanation of symbols]

 1 Core Height Aligning Device 2 Work Chuck 3 θ Rotating Axis Driving Motor 4 θ Rotating Axis 5 X Axis Positioning Means 6 X Axis Driving Motor and Encoder 7 Bed 8 Y Axis Positioning Means 9 Y Axis Driving Motor and Encoder 10 Z Axis Column 11 Z-axis drive motor and encoder 12 Z-axis positioning means 13 Spindle unit 14 Spindle shaft 15 Cutting tool 16 Non-contact type measuring sensor 17 Dummy work 18 Transfer trace 19 Transfer trace 20 θ rotary shaft head

Claims (2)

[Claims] 1. An X-axis positioning means for performing linear positioning in the horizontal direction, a Y-axis positioning means for performing linear positioning in the horizontal direction orthogonal to the X-axis positioning means, a rotationally symmetrical cutting tool, and the cutting tool. A spindle shaft having means for attaching to the shaft; a means for rotating the spindle shaft; a Z-axis positioning means joined to the X-axis positioning means or the Y-axis positioning means for vertically positioning the spindle shaft portion; A cutting tool composed of a multi-axis control machine having: an X-axis positioning means or a Y-axis positioning means; and a work rotating means having a rotation axis in a direction orthogonal to the spindle axis and having an angle indexing function for holding and rotating a work. And a device for aligning the core height of the work, having a chuck portion made based on the work rotating means reference,
An apparatus for aligning the core height of a work with a cutting tool, which is gripped by the work rotating means and has a measuring means for measuring a distance from an arbitrary reference point to the cutting tool. 2. An X-axis positioning means for linearly positioning in the horizontal direction, a Y-axis positioning means for linearly positioning in the horizontal direction orthogonal to the X-axis positioning means, a rotationally symmetrical cutting tool, and the cutting tool. A spindle shaft having means for attaching to the shaft; a means for rotating the spindle shaft; a Z-axis positioning means joined to the X-axis positioning means or the Y-axis positioning means for vertically positioning the spindle shaft portion; Using a multi-axis control machine having X-axis positioning means or work rotating means joined to the Y-axis positioning means and having a rotation axis in a direction orthogonal to the spindle axis and having an angle indexing function for holding and rotating the work. In a method of aligning the core height of a cutting tool and a work, having a chuck portion made on the basis of the work rotating means,
A device for aligning the core height of the cutting tool and the work, which is gripped by the work rotating means and has a measuring means for measuring the distance from the arbitrary reference point to the cutting tool, is used to rotate the device by the work rotating means. Rotate 180 degrees forward and backward from the position, measure the distance between the arbitrary reference point during normal rotation and reverse rotation and the cutting tool, and find the difference between the measured distances to match the center height of the cutting tool and the work. How to do.