JPH01314908A - Device and method for measuring outer diameter of thin filament - Google Patents

Abstract

PURPOSE:To maintain tension at the time of setting a filament constant as well as to measure roundness of the filament by a method wherein the filament can be applied with relative rotation while being supported on vacuum suction chucks. CONSTITUTION:When an end of a filament 10 is made close to a suction hole 2a of a nozzle 2 which is being evacuated, this end is sucked as indicated by a white arrow in the figure A and tension due to this suction is added. Since this tension is caused by abrasion of air flowing round the filament 10 and tension is applied via a so-to-call air cushion, there is no danger that abnormal tension is applied after the filament 10 is sucked straight. The filament 10 is fixed in the suction hole 2a of the nozzle 2 with a fixing knob 4 turned in this state. By carrying out this manipulation as regards both upper and lower chucks 1, 1, the filament 10 can be properly set in a measurement range 20. Measuring an outer diameter in this manner enables the tension applied to a specimen to be stably maintained at a desired constant tension.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to an outer diameter measuring machine that can efficiently measure the outer diameter of extremely thin filament bodies having an outer diameter of, for example, 0.1rnt+ or less, and an outer diameter measuring machine using the same. This paper relates to a method for measuring the outer diameter.

[Prior Art] In recent years, electronic equipment has become much smaller and more precise, and enamelled wires and the like used therein have come to be made of ultra-fine wires of, for example, 50 μm or less. Along with this, a new issue has emerged as a means to accurately measure the outer diameter of such ultra-fine wires.

To measure the outer diameter of this type of ultra-fine wire, it is appropriate to use an optical outer diameter measuring device that measures the wire diameter in a non-contact manner by irradiating a laser beam at right angles to the filament.

In this case, it is necessary to set the filament to be measured straight and at right angles within the measurement area of the laser beam.

FIG. 3 shows a conventional method of setting the filament 10 in the measurement area 20 of the laser outside diameter measuring device 6 using guide pulleys 7.7 for measuring the outer diameter, and FIG. 4 shows a method using double-sided tape. 9
．． Attach the striatal body 10 to the holder 8 to which X is attached.
- A conventional method of setting within the measurement area using a Y stage is shown.

[Problems to be Solved by the Invention] When setting a sample to be measured using the above-mentioned conventional method, no matter which method is used, the tension applied to the filament 10 is unstable and not constant, especially when the wire diameter is When it comes to ultra-fine wires of 50 μm or less, the influence of tension is very large and becomes a major factor in the variation in measured values.

In addition, because the filament is fixed to a pulley or holder to guide it to the measurement area, the outer diameter of the filament can only be measured from one direction, and fluctuations in the outer diameter in the same cross section, that is, eccentricity, cannot be measured. It's impossible to know.

It is an object of the present invention to solve the problems of the prior art as described above, to maintain a constant tension when setting the striatum, and to make it possible to measure the roundness of the striatum. The present invention aims to provide an outer diameter measuring device and a measuring method.

[Means for Solving the Problems] The present invention consists first in that a vacuum suction chuck is used when setting the striatal body, and the striatal body The specimen to be measured can always be set straight with stable tension without the risk of applying unreasonable tension to the specimen. The second feature is that relative rotation can be applied to the filament while supported on the chuck, thereby rotating the filament in the same cross section and suppressing variations in wire diameter over 360°. Since it is measurable, it is also possible to accurately detect the roundness of the filament to be measured.

[Example] The present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory diagram showing an embodiment of the outer diameter measuring machine according to the present invention. In FIG. 6, 1 is a vacuum suction chuck, 2 is a nozzle, 3 is an air suction port, and 4 is a line sucked into the chuck 1. A fixing knob 5 that fixes the strip 10 in that state is held by the chuck 1.1 &! A rotating device that rotates the rod 10 times, 6 a laser outer diameter measuring device, and 20 a measurement area in which the outer diameter can be measured using a laser beam of the laser outer diameter measuring device.

The nozzle 2 has a configuration, for example, as shown in a cross-sectional view in FIG. The air suction port 3 is connected to a vacuum pump (not shown), and air is drawn as indicated by the arrow in the figure. The air drawing speed may be appropriately selected depending on the wire diameter of the filament 10 to be measured. As a result, the striatum 10
This can be said to be a unique effect of the present invention.

When the end of the filament 10 is brought close to the suction hole 2a of the nozzle 2 which is being air-drawn, the end is suctioned as indicated by the white arrow in FIG. 2, and tension is applied by the suction force. However, this tension is due to the flow friction of the air around the striatum 10, and since the tension is applied by the air force, so to speak, abnormal tension is applied after the striatum 10 is sucked straight. In this state, the fixing knob 4 is turned to fix the filament 10 in the suction hole 2a of the nozzle 2. The above operation is performed on both upper and lower chucks 1.1
By doing this, the striatum 10 is properly set in the measurement area 20.

If the outer diameter is measured in the manner described above, the tension applied to the sample can be stably maintained at a constant desired tension. No variation occurs.

In the present invention, the above-mentioned mechanism is further provided with a rotation device 5 that can rotate the filament body 10 and the measuring device relative to each other. The filament body 10 is rotated by the rotation device 5 while being held in the vacuum suction chuck 1.1, and without being rotated, its outer diameter is continuously measured by a laser outer diameter measurement fi6,
The results are displayed or recorded on a display device (not shown).

In this way, 3 in one cross section of the filament 10
The outer diameter in the 60° direction can be detected, and if the wire is drawn eccentrically or if there is a defect in the outer shape of the coating, it can be appropriately confirmed. Therefore, it is possible to play a role not only in measuring the outer diameter dimension but also in quality control of the filament.

In addition, although the above embodiment shows the case where the filamentous body 10 is rotated, the relative rotation amount (as long as it is in the system) is sufficient for both, and it is also possible to rotate the measuring device 6 side and fix the filamentous body 10. do not have.

In addition, although it is appropriate for the optical measuring device to use a laser beam, this is not restrictive, and other optical measuring devices may be used, and the outer diameter can be measured non-contact. All you have to do is do it.

[Effects of the Invention] As described above, according to the measuring device and measuring method according to the present invention, the following excellent effects can be achieved.

(1) Since the vacuum pressure can be adjusted using a vacuum pump and the tension applied to the filament can be adjusted, the tension applied to the filament can be maintained constant and variations in measured values due to tension can be eliminated.

(2) By rotating the filament body relative to the measuring machine, variations in the outer diameter in the circumferential direction can be measured, which greatly contributes to quality control by detecting the roundness of the filament body.

(3) By locating the circumference of the striatum, the measurement becomes two-dimensional instead of one-dimensional, and the measured values can be visually captured.

(4) Since the filamentous body is set in the measuring machine using a vacuum air chuck, the operation is easy and there is no variation in the measured values depending on the measurer.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an embodiment of a measuring device according to the present invention;
FIG. 2 is a sectional view of the nozzle, and FIGS. 3 and 4 are explanatory diagrams showing a conventional method for supporting and fixing a linear body. 1: Vacuum suction chuck, 2: Nozzle, 2a: Suction hole, 4: Fixing knob, 5: Rotating device, 6: Laser outer diameter measuring device, 10: Strain body. Agent Patent Attorney Fujio Sato Figure 1 IQ Dream μ Moxibustion Body Figure 3

Claims (2)

[Claims] (1) A vacuum suction chuck capable of guiding and fixing one end of the filament into a chuck hole by vacuum suction force, a filament rotation device capable of rotating the filament held by the chuck, and an optical outer diameter A measuring device for measuring the outer diameter of a thin filament. (2) The filament to be measured is suctioned and fixed by a vacuum suction chuck, and in this state, the outer diameter of the filament is measured using an optical outer diameter measuring device while rotating the filament and the measuring device relative to each other. , a method for measuring the outer diameter of a thin filament body by which variations in the outer diameter of the filament body in the same cross section are detected and displayed or recorded.