JP2010052120A - Device for and method of adjusting machining diameter in machine tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for and a method of adjusting a machining diameter of a tool machine capable of ensuring and facilitating the adjustment of the machining diameter in the machine tool with a face plate, and improving its working efficiency and machining accuracy. <P>SOLUTION: In the device 50 for adjusting the machining diameter in the machine tool with the face plate, a rotation diameter measuring means 10 measuring the rotation diameter D2 of a cutting edge 6 rotating at a rotating speed in machining by a laser beam L, and a rotation diameter error calculating means obtaining the difference between a measured rotation diameter and a target diameter are provided, and the rotation diameter D2 is adjusted by moving a slide part 4 in a U-axis direction based on the difference. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a machining diameter adjusting device and a machining diameter adjusting method using the same in a machine tool with a face plate.

Conventionally, a machine tool with a face plate, on which a slide part equipped with a tool fixing device is attached on a face plate attached to the tip of the main shaft so as to be movable in a direction perpendicular to the rotation axis of the main shaft (U-axis direction). Is known (see, for example, Patent Document 1).
According to this machine tool with a face plate, it is possible to perform hole machining and face machining while appropriately changing the machining diameter by displacing the position of the cutting tool attached to the slide part by moving the slide part with respect to the face plate. .
JP-A-6-55387

  By the way, in the machine tool with a face plate as described above, the cutting tool is usually located at a position separated from the rotation axis of the face plate in the U-axis direction together with the slide part. Thereby, a centrifugal force acts on the cutting tool when the face plate rotates. This centrifugal force becomes more prominent as the cutting tool is separated from the rotating shaft and as the rotational speed of the face plate increases.

Therefore, even if the slide part is moved in the U-axis direction and the position of the cutting edge of the cutting tool is moved to be the same as the target diameter in the preparatory stage for cutting, the centrifugal force due to the rotation during processing There is a problem that the position of the cutting edge is displaced to the outside in the radial direction of the face plate, and the rotation diameter becomes larger than the target diameter.
In order to cope with this problem, conventionally, cutting is performed in a state where the rotational diameter of the cutting tool is slightly smaller than the target diameter in advance, and the target diameter is set again after correcting the difference from the target diameter based on this. Cutting was performed in two stages, such as cutting.

However, this complicates the work and requires time for processing, resulting in a decrease in productivity, and the correction work requires many years of experience and skill, so the rotating diameter is set to the target diameter. There was a problem that it was difficult to make it match exactly.
Further, when the cutting edge is worn, the machining diameter changes. Therefore, after stopping the rotation of the face plate and interrupting the machining, it is necessary to measure the machining diameter again and perform correction.
Even if the position of the slide portion is the same, if the rotational speed of the face plate is changed, the centrifugal force acting on the cutting tool changes, and the machining diameter also changes accordingly. Therefore, in this case as well, there is a problem that it is necessary to temporarily stop the processing and perform correction, and the work becomes complicated.

  The present invention has been made in view of such problems, and it is possible to reliably and easily adjust the machining diameter in a machine tool with a face plate, and to adjust the machining diameter of the machine tool capable of improving work efficiency and machining accuracy. An object is to provide an apparatus and a processing diameter adjustment method.

In order to solve the above problems, the present invention proposes the following means.
That is, the machining diameter adjusting device in a machine tool according to the present invention has a face plate that is relatively movable in the three-dimensional direction and rotates around the central axis, and reciprocates in the U-axis direction orthogonal to the central axis. In a machining diameter adjusting device in a machine tool provided with a movable slide portion and a cutting tool provided with a cutting blade attached to the slide portion, the rotational diameter of the cutting blade rotating at the number of revolutions during machining is measured. A rotation diameter measuring means; and a rotation diameter error calculating means for obtaining a difference between a rotation diameter measured by the rotation diameter measuring means and a preset target diameter, and the slide portion is moved in the U-axis direction based on the difference. The rotation diameter is adjusted by moving to the position.

  According to the machining diameter adjusting device in a machine tool having such characteristics, the rotational diameter of the cutting blade in a rotating state is measured at the number of revolutions during machining. The rotating diameter can be measured. Then, by performing fine adjustment by moving the slide portion based on the difference between the measured rotation diameter and a preset target diameter, the rotation diameter can be adjusted easily and with high accuracy.

  The machine tool diameter adjusting apparatus according to the present invention further includes a comparison / determination unit that determines whether or not the difference is within a preset allowable value range. When the value exceeds the value, the slide portion is moved again in the U-axis direction based on the difference to finely adjust the rotation diameter.

  Thus, only when the difference exceeds the allowable value, by adjusting the rotation diameter by moving the slide portion again, the rotation diameter matches the target diameter when the difference is within the allowable value range. Can be considered. Therefore, by adjusting the permissible value, it is possible to appropriately change the machining accuracy according to the situation, and it is possible to speed up the rotation diameter adjustment work.

Further, in the machining diameter adjusting device for a machine tool according to the present invention, the rotational diameter measuring means includes a pair of a projector and a light receiver that irradiates a laser beam in a direction orthogonal to the central axis, and the cutting tool is the laser The rotating diameter is calculated based on a coordinate value when the cutting blade is made to approach by being relatively moved from a predetermined direction and the cutting blade blocks the laser beam.
This makes it possible to easily and accurately measure the rotation diameter of the cutting tool during rotation.

  A method for adjusting a machining diameter of a machine tool according to the present invention includes a face plate that can move in a three-dimensional direction and that rotates about a central axis, and can be reciprocated on the face plate in a U-axis direction orthogonal to the central axis. A machining diameter adjusting method in a machine tool provided with a sliding part, and a cutting tool provided with a cutting blade attached to the sliding part, wherein the face plate is rotated at a rotational speed at the time of machining, and the sliding part is Based on the difference between the first step for temporary positioning by moving in the U-axis direction, the second step for measuring the rotation diameter of the cutting blade, and the measured rotation diameter and a preset target diameter, the slide unit And a third step of performing fine adjustment of the rotation diameter by moving in the U-axis direction.

  According to the machining diameter adjustment method of a machine tool having such characteristics, after rotating the face plate at the number of rotations during machining, the slide part is moved to perform temporary positioning, and the rotation diameter of the cutting blade is measured in this state. In addition, the rotational diameter can be easily and reliably adjusted by moving the slide portion based on the difference between the measured rotational diameter and a preset target value and performing fine adjustment.

  According to the processing diameter adjusting device and the processing diameter adjusting method of the machine tool of the present invention, the rotational diameter of the cutting blade in the rotating state is measured, and the sliding diameter is moved based on the measured rotational diameter. Therefore, the machining diameter can be adjusted easily and accurately, and the working efficiency and machining accuracy can be improved.

Hereinafter, a machining diameter adjusting device and a machining diameter adjusting method for a machine tool according to the present invention will be described in detail with reference to FIGS.
FIG. 1 is a front view schematically showing a machine tool with a face plate provided with a machining diameter adjusting device according to an embodiment of the present invention, and FIG. 2 is a work with a face plate equipped with a machining diameter adjusting device according to an embodiment of the invention. 3 is a side view of the machine, FIG. 3 is a block diagram of a U-axis control unit that moves the slide unit, and FIG. 4 is a flowchart for explaining a machining diameter adjusting method by the U-axis control unit.
The machining diameter adjusting device 50 of the present embodiment measures the rotation diameter D2 that is a rotation locus drawn by the cutting blade 6 of the cutting tool 5 in the machine tool 1 with a face plate by the rotation diameter measuring means 10, and uses the measured rotation diameter D2 as the measured rotation diameter D2. Based on this, the machining diameter of the workpiece can be adjusted.

The machine tool 1 with a face plate is provided with a column 2 and a table (not shown) on a base (not shown), the table is in the X-axis direction (left-right direction in FIG. 1), and the column 2 is in the Z-axis direction (depth direction in FIG. 1). Thus, the workpiece provided on the table can be moved in the X-axis direction and the Z-axis direction, that is, in a horizontal plane.
On the front surface of the column 2, a face plate 3 which is substantially disc-shaped and is connected to a main shaft (not shown) and rotatable about the central axis O is located in the Y-axis direction (vertical direction in FIG. 1) with respect to the column 2. It is attached to be movable. Thus, the face plate 3 is configured to be arbitrarily movable in the XYZ directions with respect to the table by the movement on the horizontal plane by the column 2 and the vertical movement of the face plate 3 itself.

The face plate 3 has a slide portion 4 which can be reciprocated in the U-axis direction perpendicular to the central axis O on the face plate 3 and parallel to the Y axis at the origin position in the rotation direction of the face plate 3. Is provided. The slide unit 4 is configured such that the position in the U-axis direction can be arbitrarily changed by a U-axis control unit 20 described later.
Further, a cutting tool 5 is detachably supported on the slide portion 4, and in this embodiment, the cutting tool 5 has a longitudinal direction parallel to the central axis O and the tip of the cutting tool 5. Is supported so that the cutting edge 6 provided on the outer side faces the radially outer side of the face plate 3.

  In such a machine tool 1 with a face plate, the position in the XYZ direction is determined by the movement of the column 2 and the face plate 3, and the rotational diameter D2 of the cutting edge 6 in the cutting tool 5 by the movement of the slide portion 4 in the U-axis direction. Is determined, and the face plate 3 is sent in the Z-axis direction, whereby the workpiece is cut with a desired machining diameter.

Here, in the present embodiment, a projector 11 that projects a linear laser beam L and a light receiver 12 that receives the laser beam L from the projector 11 are used as the rotation diameter measuring means 10.
The projector 11 and the light receiver 12 are installed in a direction orthogonal to the central axis O and so that the laser light L is parallel to the horizontal plane. Then, after the face plate 3 is moved to the measurement position by moving in the XYZ directions and the slide part 4 is moved to a position of a predetermined diameter in the U-axis direction, the face plate is rotated, and the face plate 3 is moved to the face plate 3 via the slide part 4. Based on the coordinate value Y2 in the Y-axis direction when the cutting blade 6 of the attached cutting tool 5 blocks the laser light L, a turning radius R2 that is the distance between the central axis O and the cutting blade 6 is measured. Based on this, a rotation diameter D2 (= 2 × R2) which is a rotation locus drawn by the cutting blade 6 is calculated.
Note that the distance between the center axis O of the cutting tool 5 to be measured and the cutting edge 6 is the Y axis when the cutting edge 60 of the reference tool 50 attached via the slide portion 4 blocks the laser light L. It is obtained from the coordinate value Y0 of the direction. More specifically, as shown in FIG. 5, a0: distance between the central axis O and the reference tool 50 center, r0: distance between the reference tool 50 center and the cutting edge 60, Y0: the reference tool 50 blocks the laser light L. If the coordinate value in the Y-axis direction when the cutting tool 5 cuts off the laser beam L, the coordinate value in the Y-axis direction when the cutting tool 5 blocks the laser beam L, that is, the distance between the central axis O and the cutting edge, that is, the turning radius R2 is R2. = A0 + r0 + Y0−Y2, and the rotation diameter D2 is calculated based on this.

In addition, as shown in FIG. 6, the rotation diameter D0 (= 2 × R0) of the reference tool 50 is obtained as follows.
First, the reference tool 50 is attached to the slide part 4 and the face plate 3 is rotated. Then, as shown in FIG. 6A, the reference plate 50 is moved from the lower position to the upper position along the Y-axis by moving the face plate 3 in the U-axis direction, and the interruption of the laser beam L is detected. The Y-axis coordinate at that time is Y01. Next, as shown in FIG. 6B, the face plate 3 is moved in the U-axis direction, the reference tool 50 is moved from the upper position to the lower position, the interruption of the laser beam L is detected, and the Y-axis coordinates at that time are detected. Is Y02. From these values Y01 and Y02, the rotation diameter D0 (= 2 × R0 = 2 × (a0 + r0)) of the reference tool 50 in the state of receiving the centrifugal force at the time of rotating the face plate 3 is calculated as D0 = Y02−Y01. Can be obtained.

Next, the U-axis control unit 20 that adjusts the rotation diameter D2 by moving the slide unit 4 in the machining diameter adjusting device 50 of the present embodiment will be described with reference to the block diagram of FIG.
The U-axis control unit 20 includes a temporary positioning operation unit 21, a rotation diameter error calculation unit 22, a comparison determination unit 23, and a minute amount adjustment unit 24.

  The temporary positioning operation unit 21 has a function of temporarily positioning the slide unit 4 by moving it in the U-axis direction. Specifically, the temporary positioning operation unit 21 is set by a target diameter setting unit 15 provided outside the U-axis control unit 20. When the set target diameter D1 is input, the sliding portion 4 is moved in the U-axis direction according to the value of the target diameter D1, and temporary positioning is performed.

  The rotation diameter error calculation means 22 compares the target diameter D1 input from the target diameter setting means 15 with the rotation diameter D2 measured and calculated by the rotation diameter measurement means 10, and calculates the difference ΔD (= | D1-D2 |) is output to the comparison determination means 23.

The comparison discriminating means 23 discriminates whether or not the difference ΔD is within a preset allowable value E, that is, whether or not | ΔD | ≦ E is satisfied, and the difference ΔD is allowed. When the value E is exceeded, a signal is sent to the minute amount adjusting means 24.
When the minute amount adjusting unit 24 receives a signal from the comparison determining unit 23, the minute amount adjusting unit 24 displaces the slide unit 4 by a minute amount so that the rotation diameter D2 approaches the target diameter D1.

The machining diameter adjusting device 50 for a machine tool according to the present embodiment has the above-described configuration. Next, the operation thereof will be described with reference to the flowchart shown in FIG.
First, in adjusting the machining diameter, the target diameter D1, the rotational speed S of the face plate 3, and the allowable value E are input (step 101). Here, the rotation speed S is a value at the time of actual cutting.

Next, based on the input value of the rotational speed S, the face plate 3 to which the cutting tool 5 is attached via the slide part 4 is rotated at the rotational speed Smin ⁻¹ (step 102), and the temporary positioning operation means 21 is activated. The slide portion 4 is moved in the U-axis direction based on the input value of the target diameter D1, and the slide portion 4 is temporarily positioned to a position corresponding to the target diameter D1 (step 103).

Thereafter, the rotation path drawn by the cutting blade 6 is measured as the rotation diameter D2 by the rotation diameter measuring means 10 (step 104).
That is, as described above, the Y-axis direction when the cutting edge 6 blocks the laser beam L by the movement in the XYZ directions by the column 2 and the face plate 3 with respect to the laser beam L projected in the horizontal direction orthogonal to the central axis O. The rotation radius R2 is measured on the basis of the coordinate value Y2 and the coordinate value Y0 of the reference tool 50 in the Y-axis direction, and the rotation diameter D2 is calculated based on this.

  The rotation diameter D2 is input to the rotation diameter error calculation means 22, and the rotation diameter error calculation means 22 calculates the difference ΔD between the target diameter D1 and the rotation diameter D2 (step 105).

This difference ΔD is input to the comparison discriminating means 23, and it is discriminated whether or not it is within the range of the allowable value E preset by the comparison discriminating means 23, that is, whether or not | ΔD | ≦ E is satisfied. (Step 106).
When the difference ΔD exceeds the range of the allowable value E, the comparison determination unit 23 sends a signal to the minute amount adjusting unit 24, and the minute amount adjusting unit 24 uses the signal to cause the rotation diameter D2 to be the target diameter D1. The slide part 4 is displaced by a small amount in the U-axis direction so as to approach the angle, and the rotation diameter is finely adjusted (step 107).

  After the fine adjustment is performed, the rotational diameter D2 is measured again by the rotational diameter measuring means 10 (step 104), and the difference ΔD is calculated in the same procedure as described above and is within the allowable value E. It is determined whether or not there is (step 106). When the allowable value E is exceeded, the slide portion 4 is again displaced by a minute amount in the U-axis direction. That is, by repeating Step 104 to Step 107, the rotational diameter D2 gradually approaches the target diameter D1.

  If it is determined that the difference ΔD is within the range of the allowable value E after such fine adjustment by repetition (step 106), the process of adjusting the machining diameter is completed (step 108). ), The process proceeds to cutting by the machine tool 1 with a face plate.

According to the machining diameter adjustment operation by the machining diameter adjusting device 50 as described above, the rotational diameter D2 of the rotating cutting blade 6 in the rotating state is directly measured at the rotational speed at the time of machining. An accurate rotational diameter D2 can be measured in a state where displacement is also taken into account.
Then, based on the difference ΔD between the rotation diameter D2 and the target diameter D1, it is possible to easily and accurately adjust the rotation diameter D2 by repeating the operation of displacing the slide portion 4 by a small amount. .

  Further, the comparison / determination means 23 determines whether or not the difference ΔD is within the range of the allowable value E, and only when the difference ΔD exceeds the allowable value E, the slide part 4 is moved again to set the rotation diameter D2. By adjusting, when the difference ΔD is within the allowable value E, it can be considered that the rotation diameter D2 coincides with the target diameter D1, so that the cutting accuracy can be appropriately changed according to the situation. It becomes possible to speed up the adjustment work of the rotation diameter D2.

  Furthermore, by adopting the projector 11 and the light receiver 12 irradiated with the laser beam L as the rotation diameter measuring means 10, the rotation diameter D2 drawn by the rotating cutting blade 6 can be easily and accurately measured.

  And according to the processing diameter adjustment method using such a processing diameter adjustment apparatus 50, after rotating the face plate 3 with the rotation speed at the time of a process, the temporary positioning of the slide part 4 is performed, Then, the cutting blade 6 The rotational diameter D2 is measured, and the fine adjustment of the slide portion 4 is performed based on the difference ΔD between the measured rotational diameter D2 and the target value D1, thereby improving the efficiency of adjustment work and the processing accuracy of the machine tool 1 with a face plate. It becomes possible to improve.

  As mentioned above, although embodiment of the processing diameter adjustment apparatus 50 and the processing diameter adjustment method of the machine tool of this invention was described, this invention is not limited to this, It is suitably in the range which does not deviate from the technical idea of the invention. It can be changed.

  For example, in the present embodiment, the cutting tool 5 is supported so that the longitudinal direction thereof is parallel to the central axis O, and the cutting edge 6 is arranged so as to face the radially outer side of the face plate 3, but is not limited thereto. For example, as shown in FIG. 7, the cutting blade 6 may be arranged so as to face the radially inner side of the face plate 2 or the front direction of the face plate 2. In this case, a reference pin 70 is provided on a side surface facing the cutting edge 6 of the cutting tool 5 in the circumferential direction, and the rotation of the cutting edge 6 is measured by measuring the rotation diameter D2 ′ of the tip of the reference pin 70. The diameter D2 can be obtained. That is, if the distance between the cutting edge 6 and the reference pin 70 is T, the rotation diameter D2 can be obtained by the calculation formula of D2 = D2′−2T.

  In the present embodiment, the rotation diameter D2 is calculated based on the coordinate value when the cutting blade 6 blocks the laser beam L by the movement in the XYZ directions by the column 2 and the face plate 3 with respect to the projected laser beam L. The projector 10 and the light receiver 11 that project the laser beam L with the cutting edge 6 fixed may be configured to move in the XYZ directions.

It is a front view which shows the outline of the machine tool with a face plate provided with the processing diameter adjustment apparatus which concerns on embodiment of this invention. It is a side view of the machine tool with a face plate provided with the processing diameter adjustment device concerning an embodiment of the invention. It is a block diagram of the U-axis control part which moves a slide part. It is a flowchart explaining the processing diameter adjustment method by a U-axis control part. It is a figure explaining the method of calculating | requiring the rotation radius of a cutting tool. It is a figure explaining the method of calculating | requiring the rotation diameter of a reference | standard tool. It is a figure explaining a modification.

Explanation of symbols

1 Machine tool with face plate 3 Face plate
4 Slide part 5 Cutting tool 6 Cutting edge 10 Rotational diameter measuring means 11 Projector 12 Light receiver 20 U-axis control part 21 Temporary positioning actuating means 22 Rotational diameter error calculating means 23 Comparison determining means 24 Minute amount adjusting means 50 Machining diameter adjusting device D1 Target diameter D2 Rotating diameter △ D Difference L Laser beam

Claims (4)

The face plate has a face plate that is relatively movable in the three-dimensional direction and rotates about the center axis, and the face plate is provided with a slide portion that can reciprocate in the U-axis direction orthogonal to the center axis. In a machining diameter adjusting device in a machine tool to which a cutting tool provided with
Rotational diameter measuring means for measuring the rotational diameter of the cutting blade that rotates at the number of rotations during processing;
A rotation diameter error calculating means for calculating a difference between the rotation diameter measured by the rotation diameter measuring means and a preset target diameter;
A machining diameter adjusting device in a machine tool, wherein the rotating diameter is adjusted by moving the slide portion in the U-axis direction based on the difference.   Comparing / determining means for determining whether or not the difference is within a preset allowable value range, and when the difference exceeds the allowable value, the slide portion is again set based on the difference. 2. The machining diameter adjusting device for a machine tool according to claim 1, wherein the rotating diameter is finely adjusted by moving in the U-axis direction. The rotating diameter measuring means is
A pair of light projectors and light receivers that irradiate laser light in a direction perpendicular to the central axis,
The cutting tool is moved closer to the laser beam from a predetermined direction, and the rotation diameter is calculated based on a coordinate value when the cutting blade blocks the laser beam. 3. A machining diameter adjusting device for a machine tool according to claim 1, wherein the machining diameter is adjusted. A face plate that can move in a three-dimensional direction and that rotates about a central axis is provided on the face plate, and a slide portion that can reciprocate in the U-axis direction orthogonal to the central axis is provided on the slide portion. A machining diameter adjusting method in a machine tool to which a cutting tool provided with
A first step of rotating the face plate at the number of rotations at the time of processing and temporarily positioning the slide part by moving in the U-axis direction;
A second step of measuring the rotational diameter of the cutting blade;
And a third step of finely adjusting the rotation diameter by moving the slide portion in the U-axis direction based on a difference between the measured rotation diameter and a preset target diameter. Machine diameter adjustment method.

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