JP2516419B2 - Blade runout measuring device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a blade edge deflection measuring device, and more particularly, to a blade edge deflection measurement device for a rotary tool such as a face milling cutter or a side cutter, which is capable of measuring the blade edge deflection with high accuracy. .

(Prior Art) Conventionally, the deflection of the cutting edge of a rotary tool is generally performed by a method according to JIS B4107 as shown in FIG. That is, the table (41) of the measuring device having the pair of center stands (40) is placed on the precision surface plate (42), and the side cutter (43) to be measured is the center stand. It is attached by a collared arbor (44) supported at both ends by (40) and a nut (45) screwed into it. Then, a dial gauge (46) is applied to the side blade of the side cutter (43), and the actual measurement value of each side blade is read by rotating the arbor (44) together with the maximum and minimum values. Is the measured value of the edge runout.

(Problems to be Solved by the Invention) However, in the above-described blade edge deflection measuring apparatus, there is a problem that the characteristic edge in the measuring apparatus is added, which is different from the blade edge deflection in a true rotary tool.

According to the present invention, by measuring the peculiar runout of the measuring device, decomposing the runout into two elements of the axial runout and the surface runout, and correcting the actually measured value of the blade runout based on the obtained decomposed value. The present invention is intended to provide a blade edge deflection measuring device capable of obtaining an accurate blade edge deflection value.

(Means for Solving the Problem) The present invention has been made in view of the above points, and the rotary tool and the measuring device attached to the measuring device are digitally shaken by the first sensor and the second sensor, respectively. The value is configured to be measured. Then, the second sensors are arranged as a pair at positions facing each other in a direction orthogonal to the axis center line so that the second sensor can be disassembled into two elements, that is, axial runout and surface runout of the placement.

Further, the blade tip deflection of the cutting blade tip measured by the first sensor is corrected and output by the computer based on the decomposition value obtained by the second sensor.

(Operation) In the blade edge shake measuring device of the present invention, the unique shake of the device itself is measured by the second sensor, which is composed of a pair and is capable of digital output. Since the second sensor has a positional relationship in which it faces each other in the direction orthogonal to the axis center line, it is decomposed into two elements, that is, the peculiar vibration and the surface vibration of the apparatus itself.

Further, the first sensor measures the blade edge deflection in the cutting edge tip of the rotary tool with a digital output, but the computer connected to the first sensor and the second sensor eliminates the deflection element unique to the apparatus. The measurement is corrected. Therefore, it is possible to measure the true edge deflection.

(Example) Hereinafter, one example of the blade edge shaker of the present invention will be described with reference to the drawings.

In FIG. 1, (1) is a cutting edge deflection measuring device, the table (2) of which is rotatable, and the upper surface of the table (2) has, for example, a rotary tool (3 consisting of front slices. ) Is placed. In this case, the rotary tool (3) is positioned by the fitting shaft (4) protruding from the table (2) and the fitting hole (5) of the rotary tool (3).

Thus, the rotary tool (3) has the cutting edge tip (6) attached to the upper end portion in the drawing. And
In the case shown, the locator (8) screwed into the mounting groove (7) is located and the cutting edge tip (6) is located.
Is fixed by a wedge piece (10) provided with a mounting screw (9).

Around the table (2), a first sensor (A) and a second sensor (B) capable of digital output are provided.
The supports (11) and (12) for mounting (B ') are located. In this case, the first sensor (A) is the cutting edge tip (6).
Of the table (2), and the second sensors (B) and (B ') are made up of a pair of sensors arranged opposite to each other and measure the inherent shake of the table (2).

That is, the second sensors (B) and (B ') are in the direction orthogonal to the axis center line (13) of the table (2),
They are arranged so as to face each other around the axis center line (13).

The second sensors (B) and (B ') are arranged in this way as shown in FIGS. 2 (a) (b) and 3 (a) (b). The peculiar runout can be decomposed into two elements, that is, axial runout and surface runout. This is because when the shake of the table (2) is measured, the two different factors of the axial shake and the surface shake described above are added and measured. Then, the shake value decomposed into these elements serves as a basis for correcting the actual measurement value by the first sensor (A), and the following equations and equations are established. In this case, assuming that the table (2) is sufficiently flat, the axial runout is a runout parallel to the orthogonal line of the axial centerline (13) as shown in FIGS. 2 (a) and 2 (b). . Therefore, the shake on the circumference of the table (2) is distributed in the vertical direction of the shaft center line (13) as the shaft shake. Under the same assumption, the surface wobbling is caused by the second sensor (B) as shown in FIGS. 3 (a) and 3 (b).
The measured values according to (B ') are equal. Then, in FIG. 3 (b), it is represented as a waveform diagram in which a dotted line overlaps a solid line.

Here, n, i, etc. are given as follows.

n; number of measurement points in table (2) i; i-th measurement point among measurement points 1 to n Bi; measurement value of i-th sensor B B′i; measurement value of i-th sensor B ′ δ1i; i-th Vibration value of shaft runout of δ2i; Vibration value of i-th shaft runout Further, the following expression is established as the correction expression in the A sensor.

Ki = Ai-δ1i-δ2i · R 2 / R 1 ... Thisゝa, Ai, R _1, R _2, etc., are given as follows.

Ai; Cutting edge runout measurement value of i-th cutting edge tip R ₁ ; Measuring radius of sensors B and B ′ R ₂ ; Measuring radius of sensor A Ki; True cutting edge deflection of cutting edge tip In this way, the cutting edge tip ( If the computer (20) corrects and calculates the blade edge runout of 6) according to the above equations, the true blade edge runout value can be obtained.

Note that FIG. 4 is a block diagram of the system in the cutting edge deflection measuring apparatus of the present invention, and FIG. 5 is an explanatory diagram showing the flow of the system calculated by the computer (20).

Further, FIG. 6 shows a modification of the blade edge runout measuring device (21) of the present invention. In this case, the rotary tool (3) is placed on the table (2), and the positioning thereof is performed by the support shaft having the rotary arm (21a) serving as the fitting shaft (4). It is performed by fitting with the fitting hole (5) forming the central mounting hole. Therefore, the first sensor (A) is attached to the rotating arm (21a).
And a second sensor (B) (B '). This is because the table (2) is rotatable in FIG. 1 described above, while the fitting shaft (4) side is rotatable in FIG.

Further, FIG. 7 shows another embodiment of the blade edge runout measuring device (31) of the present invention.

That is, the blade edge deflection measuring device (31) of the present invention is arranged on a precision surface plate (32), and a pair of center stands (34) (34) face each other on the table (33). It is provided in. And, in this center stand (34) (34),
The mandrel (35) is supported at both ends, and this mandrel (3
The rotary tool (3) is attached to the upper part by the nut (36).

The first sensor (A) and the second sensor (B) (B ') are attached to the support column (38) of the support base (37) arranged on the table (33). Is. In this case, the first sensor (A) measures the tip runout of the cutting edge tip (6) and the second sensor (B).
(B ') measures the runout on the circumference at the end face on the mandrel (35) side. And the runout at this side end surface is
Similar to the above, it is decomposed into two elements, axial runout and surface runout. This is a direction in which the second sensors (B) and (B ') are orthogonal to the rotation center line (13) of the mandrel (35) and are arranged to face each other with the rotation center line (13) as the center. Because.

The second sensor (B) (B ') thus obtained
The decomposed value by means of corrects the blade edge shake value by the first sensor (A). This correction is performed by the computer (20), and its specific procedure is performed based on FIG.

In addition, regarding the blade edge deflection corrected and output in this way, the position can be accurately adjusted if the rotary tool (3) is provided with an adjusting mechanism for the cutting blade tip (6). Further, in this embodiment, as the rotary tool (3), a front slice having a central mounting hole is shown, but it is needless to say that it can be applied to a front slice with a handle, a side cutter and the like. In this case, when applied to a front slice with a handle, the relationship between the fitting shaft (4) and the fitting hole (5) is reversed.

(Effects of the Invention) As described above, the present invention provides the first and second embodiments of the blade edge deflection measuring apparatus for the cutting edge tip (6) of the rotary tool (3) so as to eliminate the inherent deflection of the apparatus itself.
The sensors (A) (B) (B ') and the computer (20) of FIG.

Therefore, the blade edge deflection measuring device of the present invention has the advantages that the blade edge deflection of the cutting edge tip (6) can be measured with high accuracy and its operability is simple.

[Brief description of drawings]

FIG. 1 is a conceptual partially cutaway front view showing an embodiment of the blade edge runout measuring apparatus of the present invention, and FIGS. 2 (a) and 2 (b) are explanatory views showing the axial runout peculiar to the apparatus of the present invention, respectively. Fig. 3 (a)
(B) is an explanatory view showing the axial runout peculiar to the device of the present invention, respectively, FIG. 4 is an explanatory diagram showing the system configuration of the device of the present invention, FIG. 5 is an explanatory diagram showing the flow of the system, and FIG.
FIG. 7 is a conceptual partially cutaway front view showing a modified example of the device of the present invention, FIG. 7 is a conceptual partially cutaway front view showing another modified example, and FIG. 8 is a conventional example. It is a partially cutaway front view. (A) ...... First sensor (B) (B ') ...... Second sensor (2) (33) ...... Table, (3) ...... Rotary tool (4) ...... Mating shaft, (5 ) …… Mating hole (6) …… Cut blade tip, (20) …… Computer (34) …… Center stand, (35) …… Mandrel

Claims (2)

(57) [Claims] 1. A rotary tool (3) provided with a plurality of cutting edge tips (6) on a surface of a table (2) by utilizing a fitting shaft (4) and a fitting hole (5), A cutting edge that is positioned so that the cutting edge tip (6) is positioned on the upper end side, and is measured and corrected by each of the cutting edge deflection measuring sensors in these cutting edge tips (6) and the associated arrangement of the computer (20). In the shake measuring device, the measuring sensor comprises a first sensor (A) and a second sensor (B) (B ′) capable of digital output, and the first sensor (A) is a cutting blade tip ( 6) is located above the cutting edge tip (6) to measure the deflection of the cutting edge, and the second sensors (B) and (B ') are the axes of the fitting shaft (4) and the fitting hole (5). In the direction perpendicular to the center line, the positions are opposite to each other around the axis center line. Te, table (2)
The runout on the circumference of the mounting surface of the is measured, the computer (20), the second sensor (B)
Regarding the runout on the circumference of the mounting surface of the table (2) by (B ′), the runout of the shaft in the vertical direction of the axis centerline and the surface runout due to the rotation inclination about the axis centerline are 2
A blade edge shake measuring apparatus characterized in that the blade edge shaker is decomposed into two elements, and a measured value of the blade edge shake by the first sensor (A) is corrected and output based on the obtained decomposed value. 2. The cutting edge deflection measuring device according to claim 1, wherein the rotary tool (3) is supported by a horizontal mandrel (35) supported at both ends by a pair of center stands (34) on a table (33). Instead of the circumferential runout of the table (33) being positioned and measured by the second sensors (B) (B '), the circumferential runout at the side end face of the mandrel (35) is ) A cutting edge deflection measuring device adapted to be decomposed into two elements, that is, a horizontal axis deflection of the axis center line of (1) and a surface deflection due to a rotation inclination about the axis center line.