JPH05196403A - Method for detecting abnormality in dimensions of wire and line materials - Google Patents

Abstract

(57) [Abstract] [Purpose] Novel abnormality detection and dimension measurement that can continuously detect and measure abnormal parts or dimensional fluctuations over the entire length of the wire without lowering detection accuracy and cutting the wire. To provide a method. [Structure] A running wire rod 1 is provided with two pressing rollers 2a and 2b.
The holding member 2a of one pressing roller 2a fixes the supporting member 4a of the rotating shaft 3a to the wall 7a, and the supporting member 4b of the rotating shaft 3b of the other pressing roller 2b is attached to the wall 7b so as to be movable by the two pressing springs 5. At the same time, the strain gauge 6 is attached in parallel with the presser spring. The strain gauge 6 detects variations in the outer diameter of the wire to be measured as variations between the axes of the rollers. Since the running wire 1 to be measured is sandwiched by the press rolls 2a and 2b, the outer diameter variation of the wire is directly transmitted to the strain gauge 6 via the roller 2b. At this time, the function of the presser spring 5 is such that the presser roller 2b passes through the support tool 4b.
To maintain contact with the wire 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting dimensional abnormality (irregularities) and dimensional variation of a wire or strip.

[0002]

2. Description of the Related Art Conventionally, as a method for detecting a dimensional abnormality or a dimensional variation of a wire or strip, a flaw detector utilizing the principle of electromagnetic induction, an optical surface abnormality detector, or a dimension measuring instrument is used. The method used is widely used. Further, in the case of an enameled wire or the like, a method of using a detector using a die is also used for partial surface abnormality.

[0003]

However, in the flaw detector, the detection capability is lowered when the signal and noise levels are close to each other, and in the optical method, a blur (vibration) during traveling of the wire to be measured is generated. The detection accuracy becomes low. Further, the die type has a problem that if the abnormal portion becomes thicker than the die hole, the wire may be cut without passing through the hole.

An object of the present invention is to solve the above-mentioned drawbacks of the prior art, to reduce the detection accuracy, and to cut the wire or strip without causing abnormal portions or dimensions over the entire length of the wire or strip. It is to provide a new method for detecting abnormalities and measuring dimensions that can continuously detect and measure fluctuations.

[0005]

SUMMARY OF THE INVENTION The gist of the present invention is to improve the detection capability by detecting the dimensional variation of a wire / strip using a strain gauge.

That is, the above object of the present invention is to sandwich the both sides of the surface to be measured of the running wire or strip with two pressing rollers that rotate as the wire or strip runs, and measure the dimension between the measuring surfaces of the wire or strip. This is achieved by a method for detecting abnormal dimension of a wire / strip material, which is characterized in that the variation is converted into a variation between the rotating shafts of both the pressing rollers and the dimension variation is detected by a strain gauge.

In the present invention, the wire rod shall hereinafter include a strip material.

In the case of a wire rod, this is generally the surface on which the diameter is measured.

In the present invention, the fact that both sides of the surface to be measured are sandwiched by two pressing rollers that rotate as the strip runs means that the measuring surface of the wire and the rotating surface of the roller are in close contact. Therefore, the dimensional variation between the measurement surfaces of the wire can be converted into the variation between the rotating shafts of both the pressing rollers, and the dimensional variation can be detected by the strain gauge. In the present invention, a load cell is used as the strain gauge.

[0010]

Embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1) FIG. 1 shows a side view (A) and a plan view (B) of an embodiment of an apparatus for detecting abnormal dimension changes of a running wire according to the present invention. The traveling wire 1 is sandwiched by two pressing rollers 2a and 2b, one pressing roller 2a fixes a supporting tool 4 of its rotating shaft 3a to a wall 7a, and another supporting roller 4b of a rotating shaft 3b of the pressing roller 2b. The wall 7b is movably mounted by the two holding springs 5, and at the same time, the strain gauge 6 is mounted parallel to the holding springs. The strain gauge 6 detects variations in the outer diameter of the wire to be measured as variations between the axes of the rollers.

The running wire 1 to be measured is a pressing roll 2a,
Since it is sandwiched between 2b, the outer diameter variation of the wire is directly transmitted to the strain gauge 6 via the roller 2b.
At this time, the function of the pressing spring 5 is to keep the pressing roller 2b in contact with the wire 1 via the support 4b.

(Embodiment 2) FIG. 2 is a modification of the wire rod outer diameter variation measuring device shown in FIG. The outer diameter variation of the wire is transmitted to the strain gauge 6a by the relative variation of the two pressing rollers 2a and 2b. Alternatively, the frame (frame) of the presser roller is enlarged and extended to the opposite side via the fulcrum 8, and the relative variation amount between the presser rollers 2a and 2b is enlarged and detected through the strain gauge 6b.

[0014]

As described above, according to the wire rod dimension abnormality detecting method of the present invention, even if the outer diameter variation is directly transmitted to the strain gauge without deteriorating the detection accuracy of the wire rod and cutting the wire rod, the minute variation can be surely detected. To be done. Moreover, the magnitude of the variation is linearly responded to by the strain gauge, so that the variation can be accurately grasped.

[Brief description of drawings]

FIG. 1 is a front view (a) and a schematic plan view (b) of an embodiment of a mechanism for detecting a dimensional variation by attaching a traveling wire rod to an apparatus for carrying out a dimension abnormality detecting method of the present invention.

FIG. 2 is a front view of an apparatus according to another embodiment of the dimension abnormality detecting method of the present invention.

[Explanation of symbols]

 1 Running wire to be measured 2a, 2b Presser rollers 3a, 3b Rotating shafts of presser rollers 4a, 4b Supports 5 Presser springs 6, 6a, 6b Strain gauges (load cells) 7a, 7b Walls 8 Support points

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tadashi Naoki 4-10-1 Kawajiri-cho, Hitachi-shi, Ibaraki Hitachi Cable Ltd. Toyoura factory

Claims (1)

[Claims] [Claim 1] Both sides of the running wire or strip to be measured are sandwiched by two pressing rollers that rotate as the wire or strip runs.
A method for detecting abnormal dimension of a wire rod / strip material, which comprises converting a dimension variation between measurement surfaces of a strip material into a variation between rotation axes of both pressing rollers and detecting the dimension variation by a strain gauge.