JPH06254747A - Tool attaching position regulating method and measuring tool for regulation - Google Patents

Abstract

PURPOSE:To perform simple and accurate regulation of the-positioning of the cutting edge of a tool on the axis of a work by using a known dial gauge without needing troublesome trial cutting. CONSTITUTION:A dial gauge 2 is attached to the chuck C of a machine tool orthogonally to 0 on a chuck axis through a work piece 1. With this state, operation is effected by using a proper setting gauge 3 so that the measuring probe 4 of the dial gauge 2 is positioned in O above the axis of a work piece 1. The position of O above the axis is read by means of the pointer 5 of the dial gauge 2. The read position of the pointer 5 is set to a zero point and the attaching position of the tool cutting edge is regulated until the tool cutting edge is brought into contact with the measuring probe 4 and the positioned of the pointer 5 is adjusted to the zero point.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adjusting method for accurately adjusting and attaching a cutting tool attached to a tool holder such as an NC lathe to the tool holder, and a measuring tool for the adjustment.

[0002]

2. Description of the Related Art As shown in FIG. 5, a tool holder H such as an NC lathe is removably mounted with a cutting tool K such as a binder. Then, the workpiece W which is gripped by the chuck C of the machine tool by the cutting tool K and rotates in the arrow direction
When cutting is performed, the cutting edge Ka of the cutting tool K must be accurately positioned on the axis O of the workpiece W.

For example, in FIG. 6, if the cutting edge Ka of the cutting tool K is positioned on the axis O of the workpiece W as shown by the solid line, the cutting tool K reaches the axis Oa during the end face machining. Even if the cutting progresses, the central portion can be completely cut, but if the cutting edge Ka of the cutting tool K is deviated from the axis of the workpiece W as shown by the chain line, the cutting tool K is cut. However, even if the cutting progresses to the central portion, the core Wa remains at the shaft center, and the end face processing cannot be completely performed.

Further, in FIG. 7, a cutting tool K shown by a solid line
If the cutting edge Ka of the cutting tool K is located on the axis O of the work material W, it is possible to perform cutting processing to a predetermined accurate cutting diameter, but as shown by the chain line, the cutting edge Ka of the cutting tool K is on the axis center. If it is out of O, it is cut to a diameter larger than a predetermined diameter, and it is impossible to perform a cutting process to an accurate cutting diameter.

Further, if the cutting edge Ka of the cutting tool K is not accurately located on the axis O, the cutting edge will be overloaded during cutting and this will shorten the life of the cutting edge.

For this reason, conventionally, as shown in FIG. 5, when the cutting tool K is once attached to the tool holder H and the end surface of the workpiece W is thinly trial-cut and cut to the center thereof, As shown in FIG. 6, it is checked whether the core Wa does not remain in the center portion. If the core Wa remains, an adjustment plate S is interposed between the cutting tool K and the tool holder H as shown in FIG. By doing so, the mounting position of the cutting tool K was adjusted to come to O on the axis.

[0007]

As described above, in the prior art, the end face of the material to be cut is once thinly trial-cut, and thereby whether or not the mounting state of the cutting tool is accurate is measured. Naturally, even if it was found that the measurement work was troublesome and there was an error in the mounting position of the cutting tool, it was not possible to measure the accurate error because it could be measured only by the amount of division.

In view of the above-mentioned problems, it is an object of the present invention to solve the mounting error of the cutting tool with respect to the tool holder quickly, easily and accurately.

[0009]

In order to solve the above-mentioned problems, the present invention provides a tool mounting position adjusting method according to the first aspect of the present invention. A dial gauge 2 is attached to C through a suitable work piece 1 at right angles to the chuck axis O, and in this state, a measuring gauge 4 of the dial gauge 2 is used as a work piece 1 by using a suitable setting gauge 3. Is operated so as to be located on the axis O of the dial gauge 2, and the position of the axis O is read by the pointer 5 of the dial gauge 2, and the read position of the pointer 5 is set to a zero point, which is then mounted on a tool holder or the like. It is characterized in that the tool cutting edge Ka is brought into contact with the tracing stylus 4 and the mounting position of the tool cutting edge Ka is adjusted until the position of the pointer 5 reaches the zero point.

According to the measuring tool for adjusting the mounting position of the tool according to the second aspect of the present invention, the measuring tool main body 1 having the shank portion 6 held by the chuck C of the machine tool is attached to the measuring tool main body 1. The dial gauge 2 is mounted so as to be orthogonal to the axis O, and the contact point 4 of the dial gauge 2 is regulated by contacting the contact point 4 so that it is positioned on the axis O of the probe main body 1. At the same time, a settling gauge 3 that can be released from the regulation and separated is provided, and a dial 7 is provided with a knob 7 for regulating the amount of movement of the probe 4 in the descending direction. It is what

[0011]

According to the first aspect of the present invention, the dial gauge 2 is attached to the chuck C of the machine tool through the appropriate workpiece 1 at a right angle to the center O of the chuck, and in this state. Using an appropriate setting gauge 3, the contact point 4 of the dial gauge 2 is on the axis of the workpiece 1
The pointer 5 of the dial gauge 2 is read with the pointer 5 of the dial gauge 2, and the read pointer 5 is set to the zero point. As is well known, the probe 4 is always urged downward by a built-in spring, and the probe 4 and the pointer 5 are interlocked with each other.
Since the zero point is set through the pointer 5 in the measuring step described above, even if the position of the zero point of the pointer 5 fluctuates by moving the tracing stylus 4 up and down, Touch the object to be measured and move it up and down.
When the pointer moves and the pointer 5 reaches the position of the zero point, the probe 4 is positioned on the axis O.

Therefore, the pointer 5 is set to the zero point as described above, and then the cutting edge Ka of the tool K temporarily fixed to the tool holder H (FIG. 5) is brought into contact with the probe 4, and the position of the pointer 5 is set to the zero point. Until the point is reached, the tip of the tool 5 reaches the zero point when the pointer 5 reaches the zero point by adjusting the stylus 4 against the biasing force of the spring built into the dial gauge 2. Since it is located on the upper side O, it is sufficient to fix the tool K to the tool holder H at this position in earnest.

In order to fix the tool K to the tool holder H at a predetermined position, a thin adjusting plate S is interposed between the tool K and the tool holder H as shown in FIG. Adjust so that it is at the height of the upper O position, and then bolt B
The cutting edge Ka of the tool K may be replaced with a tip having a predetermined height if the tip Ka of the tool K is a throw-away tip. Alternatively, the shank portion Kb of the tool K may be cut to adjust the height.

According to the second aspect of the present invention, the measuring tool body 1 having the dial gauge 2 attached to the chuck C of the machine tool is gripped via the shank portion 6. At this time, the tracing stylus 4 is restricted by the knob 7 from moving in the descending direction. Therefore, the knob 7 is operated to separate the tracing stylus 4 above the axial center O. In this state, the setting gauge 3 having the contact surface 8 on the axis O of the main body 1 is set on the measuring tool main body 1. Then, the knob 7 is operated again to move the probe 4 downward to bring the probe 4 into contact with the contact surface 8 of the setting gauge 3. This contact operation does not require any accuracy. In other words, if the tracing stylus 4 descends to a position where it comes into contact with the contact surface 8, even if the knob 7 is rotated more than necessary, even if the regulation in the descending direction of the tracing stylus 4 is loosened, Since 4 does not move from the contact surface 8, the position of the pointer 5 interlocking with the probe 4 is
The dial plate 2 of the dial gauge 2 is rotationally adjusted with respect to the pointer 5 at the stop position so that the 0 point of the dial 10 is aligned with the pointer 5. That is, the zero point adjustment is performed.

After this zero point adjustment work, the setting gauge 3 is moved away from the contact position with the probe 4. When the setting gauge 3 is moved away from the tracing stylus 4, the tracing stylus 4 is urged by a spring built in the dial gauge 2 and extends downward, and accordingly, the pointer 5 is also displaced from the zero point position. Next, the blade tip Ka of the tool K temporarily fixed to the tool holder H is brought into contact with the downwardly extending gauge head 4, and the blade tip Ka pushes up the gauge head 4 against the urging force of the spring. Pointer 5 interlocking with 4 is 0 on scale 10.
Since the tool cutting edge Ka reaches the axial center O by coming to the position of the point, the tool K may be fixed to the tool holder H at this position in earnest.

As described above, since the displacement of the tool edge Ka can be numerically measured by the dial gauge 2 in units of several microns to several hundreds of microns, the subsequent adjustment work can be performed extremely accurately.

Further, the measurement work can be performed easily as easily as the operation of a normal dial gauge.

[0018]

1 to 3 are a front view and a side view showing an embodiment of the present invention, in which a measuring tool main body 1 has a cylindrical shank so as to be accurately gripped by a chuck C of a machine tool. The measuring tool main body 1 has a portion 6, and an attaching portion 11 having an L shape when viewed from the front. The main body 1 is attached to the attaching portion 11 having the L shape.
The dial gauge 2 is attached so as to be orthogonal to O on the axis. In this mounting structure, as shown in FIG. 3, a part 12 on the rear side of the mounting part 11 is left, and a kerf 13 which penetrates vertically from the rear side to the front side is provided as shown in the figure, and the central part thereof is provided. A through circular hole 15 into which the stem 14 of the dial gauge 2 is fitted is provided in the dial gauge 2, and the stem 14 of the dial gauge 2 is fitted into the through circular hole 15 and tightened with a bolt 16. It is designed to be installed in place. By loosening the bolt 16, the dial gauge 2 can be oriented in any direction. It goes without saying that the mounting structure of the dial gauge 2 and the measuring tool main body 1 is not limited to this embodiment, and may be an integrated structure of both.

A deep hole 17 is bored in the measuring tool body 1 from its end face in the axial direction, and a setting piece 3 forming a setting gauge can be precisely fitted into this. . The setting piece 3 is formed with a contact surface 8 which coincides with the axis O of the measuring tool body 1, and when the setting piece 3 is fitted into the deep hole 17, the dial is attached to the attachment portion 11. The gauge head 4 of the gauge 2 contacts the contact surface 8. A ball spring 18 holds the setting piece 3 in the deep hole 17.

As shown in FIGS. 1 and 2, the structure of the dial gauge 2 itself is well known, but the present invention utilizes the dial gauge 2 of this well-known structure and adds some construction thereto. Is. That is, as shown in FIG. 2, the dial gauge 2 has a pin 19 for restricting the descending amount of the probe 4.
Is incorporated, and the probe 4 cannot move further downward due to the restriction of the pin 19, but it can move upward against the biasing force of the built-in spring. It is like this. The present invention utilizes the restriction pin 19 to extend it outward from the peripheral surface of the dial gauge 2, screw the knob 7 into the extension portion 19a, and rotate the knob 7 to move the pin 19 up and down. It can be moved to.

However, an NC lathe or the like is provided with a rotary type tool holder H which holds a large number of tools, and various tool cutting tools for cutting the outer circumference or the inner circumference are held on the tool holder H. Has been done.

When a workpiece W is gripped by the chuck C of the machine tool and cuts the work W by a required cutting tool, for example, a cutting tool K for cutting the outer periphery, as shown in FIG. 5, before the cutting work, In order to measure whether or not the cutting edge Ka of the tool K is held by the tool holder H located on the axis O of the workpiece W, the chuck C holds the measuring tool body 1 as shown in FIG. Along with the deep hole 17 of the measuring tool body 1,
Then, the setting piece 3 is precisely fitted. Since the tracing stylus 4 interferes when the setting piece 3 is fitted in the deep hole 17, the knob 7 is operated to retract the tracing stylus 4 upward. Next, the knob 7 is operated to lower the probe 4, and the probe 4 is brought into contact with the contact surface 8 of the setting piece 3. The operation of the knob 7 does not require any accuracy. As long as the probe 4 contacts the contact surface 8, the measurement is not affected even if the amount of rotation of the knob 7 is large. By contacting the contact surface 8 of the setting piece 3 with the probe 4, the probe 4 is moved to the measuring tool body 1
Since it can be seen that the pointer 5 is located on the axis O of the dial, the pointer 5 at this position is rotated at the outer ring 20 of the dial gauge 2 so that the dial 5 is linked with the pointer 5 at the 0-point scale. Adjust to 10. That is, the zero point is set.

Next, as shown in FIG. 4, the knob 7 is operated to retract the tracing stylus 4 upward to set the setting piece 3.
Is removed from the deep hole 17 and the tool holder H is operated to move the blade edge Ka of the tool K temporarily fixed to the tool holder H close to the probe 4, and the knob 7 is operated again to move the probe 4 to the scale plate 9. Set it to the 0 scale of 10.

Since the point at which the tool tip Ka comes into contact with the probe 4 when the tool K is moved is located on the axis O of the workpiece of the tool tip Ka, the tool K is placed on the tool holder H at this position. You can fix it to. For this position adjustment, an adjustment plate S is interposed between the tool holder H and the tool K, for example, as shown in FIG. 4, or when the cutting edge Ka is a throw-away tip, it is replaced with a tip having a predetermined height. Alternatively, the height may be adjusted by cutting the shank portion Kb itself of the cutting tool K.

The cutting tool described in the present invention naturally includes a drilling tool such as a so-called drill, and whether or not the drill is positioned on the axis of the work can be easily and accurately determined by the present invention. It can also be measured.

[0026]

According to the first aspect of the present invention, the cutting edge of the tool can be easily and accurately used with the well-known dial gauge without the need for troublesome trial cutting as in the prior art. Can be adjusted on top.

According to the second aspect of the present invention, the measuring tool main body having a simple structure is used, and the known cutting edge is simply and accurately added to the axis of the workpiece. The position can be adjusted on the mind.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a vertical sectional side view of the same portion.

FIG. 3 is a cross-sectional plan view of the same portion.

FIG. 4 is a front view showing the same usage state.

FIG. 5 is a front view showing a state in which the cutting edge is positioned on the axis of the material to be cut and cut by the cutting tool held by the tool holder.

FIG. 6 is a diagram showing cutting trajectories when the tool edge is located on the axis of the work and when it is not located.

FIG. 7 is a diagram showing cutting trajectories when the tool edge is located on the axis of the work and when it is not located.

[Explanation of symbols]

 1 Measuring tool main body (workpiece) 2 Dial gauge 3 Setting gauge (setting piece) 4 Measuring element 5 Pointer 6 Shank part 7 Knob 8 Contact surface 9 Scale plate 10 Scale 11 Mounting part

Claims (2)

[Claims] 1. A dial gauge is attached to a chuck of a machine tool through a suitable work piece at a right angle to the center of the chuck, and in this state, an appropriate setting gauge is used to measure the work piece of the dial gauge. Operate so that it is located on the axis of the piece, read the position on the axis with the pointer of the dial gauge, set the position of the read pointer to zero, and then measure the tool edge attached to the tool holder etc. A method for adjusting the mounting position of a tool in which the mounting position of the tool cutting edge is adjusted until it touches the child and the position of the pointer becomes zero. 2. A dial gauge is attached to a main body of a measuring tool having a shank portion which is gripped by a chuck of a machine tool so as to be orthogonal to the axis of the main body, and a gauge head of the dial gauge measures. In addition to regulating the contact point so that it is located on the axis of the child body, a settug gauge that can be released from the restriction and separated from the regulation element is provided, and the dial gauge is set in the descending direction of the contact point. A measuring tool for adjusting the mounting position of a tool, which is provided with a knob for regulating the amount of movement.