JP2530993Y2 - Spindle run-out detection mechanism of processing equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a mechanism for optically detecting a runout of a main shaft of a processing apparatus having a tool changing mechanism.

[0002]

2. Description of the Related Art Next, the construction of a conventional spindle runout measuring mechanism will be described with reference to FIG. In FIG. 7, 4 is the spindle, 5 is the test bar, 5A is the tool ring, 8 is the indicator,
9 is a magnet stand, 10 is a chuck section, 11 is X
It is a table.

[0003] A test bar 5 is attached to the main shaft 4, an indicator 8 is attached to a magnet stand 9, and fixed to an X table 11. The indicator 8 is applied to a specific position of the test bar 5 (for example, a position 12.5 mm from the lower end of the chuck unit 10), and the test bar 5 is rotated once by hand to read the maximum and minimum values indicated by the indicator 8. The deflection of the main shaft 4 is the difference between the maximum value and the minimum value indicated by the indicator 8.

[0004]

In FIG. 7, the test bar 5, the indicator 8, and the magnet stand 9 must be set every time measurement is performed. Also, since the measuring means is manual, it takes time and effort. The object of the present invention is to provide a mechanism for optically measuring the runout of the spindle 4 using an automatic tool change mechanism of the processing apparatus.

[0005]

In order to achieve this object, according to the present invention, a tool base 3 provided with one or more posts 2 for taking in and out of a tool 1 is housed in the post 2,
The light of the light source 6A is applied to the test bar 5 attached to and detached from the main shaft 4 and the test bar 5 attached to the main shaft 4, the main shaft 4 is rotated, and the amplitude of the shadow 7 of the test bar 5 is measured by the line image sensor 6B. And a shake measuring device 6 for optically detecting the shake of the main shaft 4.

Next, the configuration of the spindle runout detecting mechanism according to the present invention will be described with reference to FIG. 1 is a tool, 2 is a post, 3 is a tool stand, 6A is a light source, 6B is a line image sensor, 6C is a sampling unit, and 6D is a calculation unit. The shake measuring device 6 includes a light source 6A, a line image sensor 6B, a sampling unit 6C, and a calculation unit 6D. The tool base 3 is provided with one or more posts 2 for taking in and out the tool 1. The test bar 5 is usually connected to the post 2
And is attached to and detached from the main shaft 4.

Next, an external view of the test bar 5 will be described with reference to FIG. The test bar 5 is formed by attaching a tool ring 5A to a straight cylindrical bar. Tool ring 5
A serves as a stopper when the test bar 5 is attached to the main shaft 4.

In FIG. 1, the test bar 5 attached to the main shaft 4 is lowered between the light source 6A and the line image sensor 6B, and the test bar 5 is irradiated with light from the light source 6A. Spindle 4
Is rotated, and the amplitude of the shadow 7 of the test bar 5 is measured by the line image sensor 6B. The deflection of the main shaft 4 is detected by the sampling unit 6C and the calculation unit 6D.

Next, an external view of the processing apparatus according to the present invention will be described with reference to FIG. 3 is a Y table, 13 is a Z table, 14 is a processing device, and the other components are the same as those in FIG. In addition, FIG. 3 shows that the applicant
FIG. 4 is an improved version of FIG. 4 of the “tool changing mechanism of a processing device” filed for utility model registration on the 18th.

The X table 11, the Y table 12, and the Z table 13 move in the X axis direction, the Y axis direction, and the Z axis direction, respectively. The spindle 4 is fixed to the Z table 13 and moves together with the Z table 13. The tool base 3 is connected to the X table 11 and moves together with the X table 11. The post 2 stores the tool 1 or the test bar 5. The runout measuring device 6 is connected to the tool stand 3 and moves together with the X table 11.

When measuring the deflection of the main shaft 4, a test bar 5 is attached to the main shaft 4. The spindle 4 is raised, and the test bar 5 is lowered between the light source 6A and the line image sensor 6B as shown in FIG. After lowering the test bar 5, the spindle 4
To rotate. The test bar 5 may be rotated simultaneously with the lowering.

The light source 6A projects a shadow 7 of the test bar 5 on a line image sensor 6B. The distance L from the end of the line image sensor 6B obtained from the output of the line image sensor 6B to the rising edge of the shadow 7 changes to a continuous mountain shape as shown in FIG. 4 is periodically sampled by the sampling unit 6C at a high speed of, for example, 5 μs.
The values are sequentially provided to the calculation unit 6D. The operation unit 6D holds the maximum value L2 and the minimum value L1 of the given data. The minimum value L1 is the distance shown in FIG. 5, and the maximum value L2 is the distance shown in FIG.
Is the distance indicated by The runout of the main shaft 4 is calculated by L2−L1.

After the measurement is completed, the rotation of the spindle 4 is stopped, the spindle 4 is raised, the spindle 4 is moved on the post 2, and the spindle 4 is moved.
To return the test bar 5 to the post 2. If the runout of the main shaft 4 is normal, the tool 1 is attached to the main shaft 4. When an abnormality is detected, the rotating light is turned on or off, and a warning of a run-out abnormality of the spindle 4 is displayed on the CRT of the processing device 14.

[0014]

According to the present invention, the runout of the main shaft is optically measured using the automatic tool changing mechanism of the processing apparatus, so that the runout of the main shaft can be automatically measured.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a spindle runout detecting mechanism according to the present invention.

FIG. 2 is an external view of a test bar 5;

FIG. 3 is an external view of a processing apparatus according to the present invention.

FIG. 4 is a change diagram of a distance L accompanying rotation of a main shaft 4.

FIG. 5 is a state diagram when the distance L has reached a minimum value L1.

FIG. 6 is a state diagram when the distance L reaches a maximum value L2.

FIG. 7 is a configuration diagram of a spindle shake detection mechanism according to a conventional technique.

[Explanation of symbols]

 Reference Signs List 1 tool 2 post 3 tool stand 4 spindle 5 test bar 6 runout measuring instrument 6A light source 6B line image sensor 6C sampling unit 6D calculation unit 7 shadow 11 X table 12 Y table 13 Z table 14 Processing device

Claims (1)

(57) [Scope of request for utility model registration] 1. A tool table (3) provided with at least one post (2) for taking in and out a tool (1), and a test bar (5) housed in the post (2) and attached to and detached from a spindle (4). ) And spindle (4)
The light of the light source (6A) is applied to the test bar (5) attached to the test bar, the spindle (4) is rotated, and the amplitude of the shadow (7) of the test bar (5) is measured by the line image sensor (6B). 1. A main shaft runout detecting mechanism of a machining apparatus, comprising: a runout measuring device (6) for optically detecting the runout of a main shaft (4).