JP2003340688A - Tool adjustment method in lathe processing equipment - Google Patents

Abstract

(57) [Problem] To provide a method of adjusting a cutting tool in a lathe processing apparatus capable of favorably adjusting a position of a cutting tool in a height direction of a cutting edge. SOLUTION: A moving table is moved forward while a reference point forming tool for forming a reference point serving as a reference for comparing the mounting height of a cutting tool 10 is attached to a spindle rotating unit 1 and rotated. A tool as a reference point is formed by marking the tool holder 12 with the reference point forming tool by bringing the tool holder 12 that moves integrally with the moving table 11 into contact with the reference point forming tool. The CCD camera 7 attached to the rotating unit 1 images the hole and the cutting edge of the cutting tool 10, and compares the heights of the hole and the cutting edge of the cutting tool 10 in the respective captured images, so that the moving table 11 can be obtained. The cutting edge height of the cutting tool 10 is adjusted with the cutting tool holder 12 still attached.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turning tool adjusting method in a lathe processing apparatus.

[0002]

2. Description of the Related Art A lathe machining apparatus (hereinafter referred to as a lathe) is equipped with a cutting tool. Since the height of the cutting edge of the cutting tool during lathe processing has a great influence on the processing accuracy required for machined parts and the stabilization of the cutting surface etc., it has been customary to adjust the cutting edge height of the cutting tool. Accurately adjust the height of the cutting edge of this cutting tool to the set height (usually, the height of the cutting edge of the cutting tool is the same as the height of the spindle axis of the lathe processing machine) It is desirable to do.

In the conventional method for adjusting a cutting tool in a lathe processing apparatus, generally, a jig for adjusting the height position of the cutting edge of the cutting tool is provided at a position outside the machine different from the lathe processing apparatus to which the cutting tool is attached. Adjustment is performed by a height position adjusting jig (hereinafter referred to as an adjusting jig).

The structure of a general adjusting jig is shown in FIGS.
Shown in. As shown in FIG. 4, the adjustment jig 30 is attachable to and detachable from the support base 31, and the height from the spindle axis of the lathe to the moving table 11 (see FIG. 6) to which the bite 10 is attached. A master 32 having a reference position corresponding to the above and a magnifying scope 33 for observing the blade position of the master 32 and the cutting tool 10 (see FIG. 5) are provided. The magnifying scope 33 is provided with an objective lens section 34 and an eyepiece lens section 35, so that the positions of the cutting edges of the master 32 and the cutting tool 10 can be magnified and observed. Further, the enlargement scope 33 can be adjusted by freely moving its position in the vertical and horizontal directions as well as the front and rear directions by means of the vertical position adjusting screw 36, the horizontal position adjusting screw 37 and the front and rear position adjusting screw 38. Further, cursor lines are added to the eyepiece lens portion 35 in the XY directions (left and right directions and up and down directions).

As shown in FIG. 5, the adjusting jig 3
In the place where the master 32 is attached to the support base 31 of 0, instead of the master 32, the bite holder 12
Is said to be removable. The bite holder 12 is provided with a height adjusting screw 9 having a sliding surface that allows the bite 10 to be moved up and down in the height direction (direction a).

Conventionally, the position of the cutting edge height of the cutting tool 10 was adjusted in the following manner while using the adjusting jig 30 having such a configuration. First, as shown in FIG. 4, with the master 32 attached to the support base 31 of the adjustment jig 30, the magnifying scope 33 is moved to a position where the reference position of the master 32 can be recognized to focus on it. Next, of the XY cursor lines added to the magnifying scope 33, the line in the horizontal direction (X direction) is aligned with the reference point of the master 32 and is aligned with the line parallel to the surface on which the master 32 is attached. After that, even when the position of the magnifying scope 33 is moved, the vertical movement that affects the height direction is not performed.

Next, the bite holder 1 which removes the master 32 from the support base 31 and attaches it to a lathe instead
2 is attached to the support base 31. Further, the target bite 10 is fixed to the bite holder 12, and the magnifying scope 3
Focus on 3 and check the deviation from the horizontal line. Then, the height adjusting screw 9 of the cutting tool holder 12 is adjusted so that the cutting edge of the cutting tool 10 coincides with the line in the lateral direction (X direction) of the magnifying scope 33, and is fixed in the same state.

After adjusting the height of the cutting edge of the cutting tool 10 as described above, the cutting tool holder 12 to which the cutting tool 10 is fixed is mounted and fixed on the moving table 11 (see FIG. 6) of the lathe. When there are a plurality of cutting tools 10 and cutting tool holders 12, the adjustment work of the target cutting tool 10 and the cutting tool holder 12 is sequentially repeated.

[0009]

However, even when the height of the cutting tool 10 is strictly adjusted by the above-mentioned conventional adjusting method, the cutting tool holder 12 having the cutting tool 10 fixed thereto must be attached to the moving table 11 of the lathe after this. Therefore, the cutting edge height of the cutting tool 10 fixed on the moving table 11 of the lathe is as shown in FIGS. 6 (a) and 6 (b).
Previously cut chips 42, and the same unevenness 43 of the mounting surface of the bite holder 12 to the moving table 11 as described above,
There is a problem that the position of the bite holder 12 is not always constant due to scratches or the like, resulting in an unstable combination of elements. Therefore, when the cutting tool holder 12 is fixed to the moving table 11, the position of the cutting edge of the cutting tool 10 deviates from the height H0 that coincides with the spindle axis 2 of the lathe.
Occurs, and the locus of movement of the cutting tool 10 during lathe machining passes through a plane that does not coincide with the spindle axis 2 of the lathe.

When such a slight deviation b of the cutting edge position of the cutting tool 10 occurs, there arises a problem that stable machining accuracy cannot be obtained particularly in precision cutting with a small diameter. Further, in the small-diameter boring process, the ratio L between the outer diameter D and the protruding length L of the boring bar 10 to be used is L.
When / D becomes large, resistance due to cutting acts on the cutting edge of the cutting tool 10 during the cutting process, and the shank portion of the cutting tool 10 for boring is processed in a slightly bent state. Under such a condition, the adjustment position in the height direction of the cutting edge of the cutting tool 10 may be offset in consideration of the above-described slight bending amount. The position adjustment of the cutting tool 10 in the cutting edge height direction in such a situation is difficult with a conventional adjustment method having no repeatability.

The present invention solves the above problems, and an object of the present invention is to provide a method for adjusting a cutting tool in a lathe processing apparatus, which can favorably adjust the position of the cutting tool in the height direction of the cutting edge.

[0012]

In order to solve the above problems, the present invention provides a movable table which is movable in a front-rear direction parallel to a spindle axis and in a left-right direction orthogonal to the spindle axis.
A method for adjusting the mounting height of a cutting tool attached to a cutting tool holder fixed to the moving table, in a lathe processing apparatus including a spindle rotating section that rotates about a spindle axis, the mounting height of the cutting tool A moving table which moves the moving table in the forward direction while moving a moving table in a forward direction while mounting and rotating a reference point forming tool for forming a reference point serving as a reference for comparing By bringing the side member into contact with the reference point forming tool, the moving table side member is marked by the reference point forming tool to form a reference point, and the image pickup means arranged on the spindle rotating part side The height of the cutting edge of the cutting tool is confirmed by imaging the reference point and the cutting edge of the cutting tool, and comparing the heights of the reference point and the cutting edge of the cutting tool in each captured image. And adjusting by.

According to the present invention, since the height of the cutting edge of the cutting tool can be adjusted while the cutting tool holder is still attached to the moving table, minute irregularities, scratches, and scratches on the moving table and the mounting surface of the cutting tool can be adjusted. The tip of the cutting edge of the cutting tool is not affected by scraped chips, etc.
The bite can be fixed so that it is always located at a constant and stable height position.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is a movable table which is movable in a front-rear direction parallel to the spindle axis and in a left-right direction orthogonal to the spindle axis, and a spindle which rotates about the spindle axis. A method for adjusting the mounting height of a cutting tool attached to a cutting tool holder fixed to the moving table in a lathe processing apparatus including a rotating part, which is a reference point for comparing the mounting height of cutting tools. A reference table forming tool for forming a reference point forming tool is attached to the main spindle rotating part and is rotated to move the moving table forward to move the movable table side member integrally with the moving table. By touching the tool,
The moving table side member is marked with the reference point forming tool to form a reference point, and the reference point and the cutting edge of the cutting tool are imaged by the image pickup means arranged on the spindle rotating portion side, and the reference point is set. It is characterized in that the height of the cutting edge of the cutting tool is recognized and adjusted by comparing the heights of the cutting edge of the cutting tool and the cutting edge of each cutting image.

According to this method, the height of the cutting edge of the cutting tool can be adjusted with the cutting tool attached to the moving table, so that minute unevenness, scratches, and scratches on the moving table and the mounting surface of the cutting tool can be adjusted. It is possible to fix the cutting tool so that the tip of the cutting edge of the cutting tool is always located at a constant and stable position in the height direction without being affected by scraped chips and the like.

The invention described in claim 2 is the same as claim 1
In the method for adjusting a turning tool in the lathe machining apparatus described above, the image pickup means is arranged on the spindle axis of the spindle rotating portion at the time of image pickup.

According to this method, by disposing the image pickup means on the spindle axis of the spindle rotating portion, the adjustment of the cutting tool can be stably and accurately performed without separately providing a space for disposing the image pickup means. It can be carried out.

(Embodiment of the Invention) An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is an external perspective view showing a lathe processing apparatus (hereinafter referred to as a lathe) used in a tool adjusting method according to an embodiment of the present invention. As an example, in the case of a general comb blade type NC lathe Is shown. In FIG. 1, reference numeral 1 denotes a spindle rotating portion that is driven to rotate about a spindle axis 2 by a drive source (not shown), has a clamp device (not shown) at its tip, and is cut by a cutting tool 10. Not only the object to be cut but also the rotary cutting tool 3 described later and a CCD as an image pickup means
The camera 7 can also be assembled. The spindle rotating part 1 has a structure that can be fixed in the rotating direction.

In this adjusting method, as shown in FIG. 1, a rotary cutting tool 3 such as a drill is attached to a spindle rotating portion 1 of a lathe at a position of a spindle axis 2. The moving table 11 of the lathe is reversible with respect to the spindle axis 2 by a drive source (not shown) in the left-right direction (the c direction) orthogonal to the spindle axis 2 and in the front-rear direction (the d direction) parallel to the spindle axis 2. A bite holder 12 for fixing the bite 10 is mounted. A circular hole 4 is formed in the bite holder 12 as a reference point centered on the spindle axis 2 by being cut by the rotary cutting tool 3 described above. Further, the bite holder 12 is provided with a height adjusting screw 9 as an example of height adjusting means for adjusting the mounting height of the bite 10.

FIG. 2 is an external perspective view schematically showing a state in which the adjusting method of the bite is being performed. As shown in FIG. 2, a CCD camera 7 as an image pickup means is provided on the main spindle rotating portion 1 of the lathe via a shaft centering portion 5 and an angle adjusting portion 6.
And the objective lens 8 is attached. Further, as shown in FIG. 3, the CCD camera 7 is connected with a monitor 13 as a display means and an image processing device 17 including a microcomputer for processing the image picked up by the CCD camera 7 and displaying it on the monitor 13. This monitor 13 has a CCD
The image taken by the camera 7 can be displayed. CC is adjusted by the centering screw 14 provided on the shaft centering unit 5 or the angle adjusting screw 15 provided on the angle adjusting unit 6.
The D camera 7 and the objective lens 8 can be adjusted so as to be located on the main axis line 2. Further, reference numeral 16 in FIG. 2 denotes an illumination device that illuminates an object to be imaged. Also,
As shown in FIG. 3, on the screen of the monitor 13, an XY cursor line 13 that can set an arbitrary position of a projected object is displayed.
a, 13b are plural (in FIG. 3, in order to make it easy to see, 1
Only books are shown).

Next, a method of adjusting the height of the cutting tool 10 will be described. As shown in FIG. 1, first, the rotary cutting tool 3 is clamped on the spindle rotating portion 1. And the spindle rotating part 1
The moving table 11 is moved in the left-right direction (direction c) so that the end surface of the bite holder 12 faces the main spindle axis 2. Next, while the rotary cutting tool 3 is being rotated by the spindle rotating unit 1, the moving table 11 is moved in the forward direction (d direction), and the rotary cutting tool 3 makes a circular hole on the end face of the bite holder 12. 4 is cut and formed. In this way
A circular hole 4 as a reference point is formed at a height corresponding to the spindle axis 2 of the spindle rotating portion 1 in the bite holder 12.

Next, the rotary cutting tool 3 is removed from the main spindle rotating portion 1, and the main shaft rotating portion 1 is fixed so as not to rotate and the shaft centering portion 5 is attached. The angle adjusting unit 6, the CCD camera 7 and the objective lens 8 are assembled. After that, the movable table 11 is moved in the c direction so that the circular hole 4 as the reference point formed on the end surface of the bite holder 12 is within the display area on the monitor 13. (Therefore, the size of the hole 4 as the reference point is set in advance within the range displayed in the display area of the monitor 13.) Then, at the center of the hole 4 displayed on the screen of the monitor 13. , XY cursor line 13
While aligning a and 13b, the main shaft rotating unit 1 is released so that the horizontal line (for example, the X cursor line 13a) is parallel to the horizontal moving direction (c direction) of the moving table 11, and the moving table is moved. While repeating the reciprocating movement of 11 in the c direction, the horizontal position of the CCD camera 7 is adjusted and the spindle rotating portion 1 is fixed again. At this time, if the center of the hole 4 as the reference point cannot be displayed on the screen of the monitor 13 due to the magnifying power of the objective lens 8,
The angle adjusting screw 15 of the angle adjusting unit 6 and the centering screw 14 of the shaft centering unit 5 are adjusted so that the center of the hole 4 can be projected on the screen of the monitor 13. Then, a horizontal line that coincides with the center of the hole 4 is recognized (a person may store or record the image, or if the image processing device 17 is connected to the monitor 13, the image processing is performed. It may be stored in the device 17).

Next, the moving table 11 is moved in the direction c so that the tip of the cutting edge of the cutting tool 10 to be adjusted is within the display area on the monitor 13, and the tip of the cutting edge of the cutting tool 10 is displayed on the screen of the monitor 13. Project. Then, the position of the tip of the cutting edge of the cutting tool 10 is set to the XY cursor lines 13a, 13
Compared with the vertical line of b (the line parallel to the Y cursor line 13b or the Y cursor line 13b), the height adjusting screw 57 is operated to adjust the height to an appropriate level. Therefore,
When the height of the tip of the cutting edge of the cutting tool 10 is made to coincide with the spindle axis 2 of the spindle rotating part 1, the image 10 of the cutting tool 10 is placed at the center position L1 of the recognized image 4'of the hole 4 with respect to the vertical line. The height adjusting screw 9 is adjusted so that the position L2 of the tip of the cutting edge of 'is matched. In addition, when there are a large number of horizontal lines and a horizontal line (a line parallel to the X cursor line 13a or the X cursor line 13a) that coincides with the center position of the hole 4, the moving table 11 is moved to c. While moving in the direction, 10 bits are set on the horizontal line.
The height adjusting screw 9 may be adjusted so that the tips of the blade edges of the two are aligned.

According to the above procedure, the height of the cutting edge of the cutting tool 10 can be adjusted with the cutting tool 10 and the cutting tool holder 12 attached to the NC lathe. Accordingly, the tip of the cutting edge is always located at a constant and stable position in the height direction without being affected by minute irregularities on the moving table 11 and the mounting surface of the bite holder 12, scratches, chips that have been previously cut, and the like. The bite 10 can be fixed in position. As a result, it is possible to obtain stable machining accuracy particularly in precision cutting of small diameter.
The original cutting ability of can be maximized.

In the above embodiment, the CCD
The case where the camera 7 and the objective lens 8 are adjusted by manually rotating the adjusting screws 14 and 15 provided on the axis centering unit 5 and the angle adjusting unit 6 has been described, but the present invention is not limited to this and, for example, Alternatively, an actuator using a piezoelectric element may be used as a substitute for the adjusting screws 14 and 15 and the adjusting portion may be electrically driven to perform the adjustment by remote control.

Further, in the above embodiment, the CCD
Although the configuration in which the camera 7, the shaft centering unit 5, and the angle adjusting unit 6 are attached to the spindle rotating unit 1 is shown, the present invention is not limited to this. That is, it suffices that the image focus area of the CCD camera 7 is within a range in which the tip of the cutting edge of the cutting tool 10 mounted on the moving table 11 of the lathe processing apparatus can be observed. The mechanism for adjusting the image rotation direction by the CCD camera 7 may be installed in a place other than the spindle rotating unit 1, and can be easily added by the conventional general design and parts processing. . Furthermore, the adjustment device can be freely recombined.

However, as in the above embodiment, the CCD camera 7, the shaft centering unit 5, and the angle adjusting unit 6 are attached to the main shaft rotating unit 1.
By adopting the structure to be mounted on the moving table 11, the CCD camera 7, the axis centering portion 5, and the angle adjusting portion 6 are not required to be separately disposed, and the moving table 11 is provided with a plurality of cutting tools 1.
Even if 0 and the bite holders 12 are arranged side by side, each bite 10 within the image pickup range of the CCD camera 7 is simply moved by moving the moving table 11 in the c direction.
There is an advantage that the tip of the blade can be positioned and adjustment is easy.

In the above embodiment, the hole 4 as the reference point is formed in the bite holder 12. In this case, the bite holder 12 also functions as a moving table side member, and the reference point is set as the reference point. Although there is an advantage that it is not necessary to separately provide a component for forming, the present invention is not limited to this, and a movable table side member integrally provided with the movable table 11 and the bite holder 12 may be separately provided. Good.

[0029]

As described above, according to the turning tool adjusting method in the lathe processing apparatus of the present invention, the moving table is moved forward while the reference point forming tool is attached to the main spindle rotating portion and is rotated. And contact the moving table side member to the reference point forming tool, and mark the moving table side member with the reference point forming tool to form a reference point,
The reference point and the cutting edge of the cutting tool are respectively imaged by the imaging means arranged on the spindle rotating section side, and the heights of the reference point and the cutting edge of the cutting tool in the respective picked-up images are compared, whereby the cutting table is moved to the moving table. It is possible to recognize and adjust the cutting edge height of the cutting tool with the holder and cutting tool attached. Therefore, the tip of the cutting edge is always located at a constant and stable position in the height direction without being affected by minute irregularities on the moving table and the mounting surface of the cutting tool holder, scratches, chips that have been previously cut, etc. You can fix the bite like so. As a result, it is possible to obtain stable machining accuracy, especially in precision cutting with a small diameter, and to maximize the original cutting ability of the cutting tool.

Further, by arranging the image pickup means on the spindle axis of the spindle rotation part during image pickup, stable and accurate adjustment of the bite can be performed without separately providing a space for disposing the image pickup means. You can

[Brief description of drawings]

FIG. 1 is a perspective view showing a lathe processing apparatus used in a tool adjusting method according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which the tip of the cutting edge of the cutting tool is imaged by a CCD camera in the adjusting method of the cutting tool.

FIG. 3 is a front view schematically showing a state in which a bite or the like is displayed on a monitor in the same bite adjusting method.

FIG. 4 is a perspective view showing a state in which a master is visually recognized with an expansion scope in a conventional bite adjusting method.

FIG. 5 is a perspective view showing a state in which the bite is visually recognized with a magnifying scope in the conventional method for adjusting the bite.

6 (a) to 6 (d) are views for explaining problems in the conventional method for adjusting a bite.

[Explanation of symbols]

1 Spindle rotating part 2 Spindle axis 3 Rotary cutting tools (reference point forming tools) 4 holes (reference point) 7 CCD camera (imaging means) 8 Objective lens 9 Adjustment screw (height adjustment means) 10 bytes 11 Moving table 12-bit holder (moving table side member) 13 Monitor (display means) 17 Image processing device

Claims (2)

[Claims] 1. A lathe processing apparatus comprising: a movable table which is movable in a front-rear direction parallel to a spindle axis and a left-right direction orthogonal to the spindle axis; and a spindle rotating section which rotates about the spindle axis. A method for adjusting the mounting height of a cutting tool attached to a cutting tool holder fixed to the moving table, comprising a reference point forming tool for forming a reference point serving as a reference for comparing the mounting heights of the cutting tools. While being attached to the main spindle rotating portion and being rotated, the movable table is moved in the forward direction, and the movable table side member that moves integrally with the movable table is brought into contact with the reference point forming tool, whereby the reference point A reference point is formed by marking the moving table side member with a forming tool, and the reference point and the cutting edge of the cutting tool are set by the image pickup means arranged on the spindle rotating portion side. Respectively by imaging, by comparing the height of each captured image of the cutting edge of the reference point and the byte,
A method for adjusting a cutting tool in a lathe machining apparatus, which comprises recognizing and adjusting the cutting edge height of the cutting tool. 2. The method of adjusting a cutting tool in a lathe processing apparatus according to claim 1, wherein the image pickup means is arranged on a spindle axis of the spindle rotating portion at the time of image pickup.