JPH0562810U - Material diameter measuring device - Google Patents

Abstract

(57) [Summary] [Purpose] In measuring the material diameter of circular materials, the measuring structure is simple, there is no danger of contact when handling the material, and automatic measurement is easy. To do. A length measuring device having a circular outer diameter D of material, the material receiving portion 5 having a V groove 3 for mounting the material W at a position not on the transfer line of the material W, and each corner portion 13 of the V groove 3. From the above to the lower surface of the placed material W, the detecting means 7 for detecting the length S ₁ and the calculating means 15 for calculating the material diameter D from the detected value.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a material measuring device for measuring the diameter of a material having a circular outer shape (hereinafter referred to as a circular material) such as a round bar or a circular pipe.

[0002]

[Prior Art]

 In recent years, in particular, the operations related to material handling, such as cutting of materials, supply of materials to processing machines, and unloading of processed products, have been fully automated.

For circular materials, when considering a series of automated operations such as material feeding, cutting, and product transportation, the material that is a characteristic of this material before entering these series of operations (system). It is important to detect the diameter accurately.

For example, when supplying a material to a three-dimensional system in which the processing space and the like are reduced, human error cannot be avoided if only the material diameter measurement is manually performed, and a material having an incorrect diameter is supplied. Will be done.

When the measurement of the material diameter is largely wrong, the operation of the system itself is disturbed, and even if the cutting is completed, it is impossible to obtain a predetermined product by processing the material having the different diameter.

A conventional example of a device for automatically measuring the diameter of a circular material is shown in FIG. This measures the material diameter D of the material W on, for example, the material transfer line 101 in the three-dimensional system.

The L-shaped probe 103 in a front view is caused to project the piston rod 107 of the cylinder 105 to sandwich the material W between the side wall 109 of the material transfer line 101 and the probe 103, and the light projecting unit 111 Is transmitted through the small hole 113 of the tracing stylus 103 and is received by the light receiving unit (not shown), the position of the tracing stylus 103 at this time is input to the arithmetic unit 115 as an electric signal, and the material diameter D of the material W Is measured.

Since the tracing stylus 103 is provided on the material transfer line 101, this automatic measuring device requires timing control so that the piston rod 107 is projected after the movement of the material W is stopped. The control mechanism becomes complicated, and the material W may come into contact with or collide with the probe 103 during the transfer operation.

[0009]

[Problems to be solved by the device]

 The purpose of this invention is to solve such a problem in measuring the diameter of a circular material, to simplify the measurement structure, to avoid the risk of contact during handling of the material, and to easily measure the diameter of the material. A length measuring device is provided.

[0010]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention is a length measuring device for a material having a circular outer diameter, which has a material receiving portion having a V groove for mounting the material at a position not on the material transfer line, and a corner of the V groove. The material diameter measuring device is provided with a detecting means for detecting the length from the corner to the lower surface of the material placed above, and a calculating means for calculating the material diameter from the detected value.

Further, the detecting means is configured as a material diameter measuring device for detecting the length by the contact of the probe with the lower surface of the material.

Alternatively, the detection means may be configured to detect the length without contacting the position of the lower surface of the material.

[0013]

[Action]

 The material diameter is calculated by the calculation means based on the angle of the V groove and the value detected by the detection means.

Since the detection operation is performed by placing the material on the material receiving portion that is not on the material transfer line, there is no fear that the detection means or the like will be damaged by contact of the material when handling the material.

The detection means may be configured to detect the length by contact of the probe with the lower surface of the material, or to detect the length without contacting the position of the lower surface of the material. This makes it possible to easily measure the diameter of the placed material.

[0016]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an example of a material diameter measuring device, and FIG. 2 is an enlarged front view of a main part thereof.

A plurality of material receiving portions 5 each having a V-shaped groove 3 are arranged at intervals on a material replenishing table 1 installed off a material transfer line (not shown). The V groove 3 is formed at an angle of 90 °.

A linear gauge 7, which is an example of a detection means, is attached to the material replenishing stand 1 below the V groove 3, and a stylus 11 that can freely move in and out of the gauge body 9 is mounted on the V groove 3 of the material receiving portion 5. It is positioned on a straight line passing through the center C of the placed material W and the corner portion 13 of the V groove 3 (intersection line of two inclined planes forming the V groove 3).

The linear gauge 7 inputs the projecting length of the probe 11 as an electric signal to the computing means 15, and the computing means 15 calculates the material based on the angle of the V groove 3 and the projecting length of the probe 11. This is a configuration for calculating the diameter D.

That is, as shown in FIG. 2, the length from the center C of the material W to the corner portion 13 of the V groove 3 is L _1, and the length from each corner portion 13 to the lower surface of the material W is S. When _{1, D / 2 = L 1} sin45 ° becomes also because it is _{D / 2 = L 1 -S 1} , these give the L ₁ ≒ 0.2071D, material diameter D ≒ S _1/0. It becomes 2071.

Therefore, by detecting the length S ₁ from the corner portion 13 to the lower surface of the material W by the linear gauge 7, the calculation means 15 can automatically measure the material diameter D.

When the automatic measurement of the material diameter D by the linear gauge 7 and the calculation means 15 is completed, the crane hook 19 of the crane 17 illustrated in FIG. 1 moves from below the material receiving parts 5 and 5 to below the material W. The material W is transferred from the material replenishing stand 1 to, for example, a conveyer conveyor or the like by the lifting and lateral movement operations of the crane 17 except the above.

The detection operation is performed by placing the material W on the material receiving portion 5 which is not on the transfer line of the material W, so that when the material is handled, the linear gauge 7 or the like may contact the material W or the like. There is no risk of damage.

No timing control is required for the stop operation of the material W transfer operation and the detection operation, and the control mechanism may be simple.

The linear gauge 7 is sufficient to detect the length S ₁ from the corner portion 13 of the V groove 3 to the lower surface of the material W by the contact of the probe 11 with the lower surface of the material W.

The material receiving portion 21 as another embodiment shown in the front view in FIG. 3 is formed by forming the angle of the V groove 23 into a non-rectangular α, and the corner angle of the V groove 23 from the center C of the material W. If the length to the portion 25 is L ₂ and the length from the corner portion 25 to the lower surface of the material W is S ₂ , then D / 2 = L ₂ sin α, and D / 2 = L ₂ − since in S _2, the these, give _{S 2 = D / 2 {(} 1 / sinα) -1}, as a material diameter _{D = 2S 2 / (1 /} sinα) -1.

Even in the case where the non-right angle V groove 23 is formed in this manner, the length S ₂ from the corner portion 25 to the lower surface of the material W is the same as the material receiving portion 5 of the right angle V groove 3 in FIG. The linear gauge 7 can detect the material diameter D automatically, and there is no risk that the linear gauge 7 will be damaged by the contact of the material W when handling the material. 7 can be a simple one.

In another embodiment of the detecting means shown in the front view in FIG. 4, the length S ₁ from the corner portion 13 of the V groove 3 to the lower surface of the material W ₁ is non-contacted by using the photoelectric detector 27. It is detected by the state.

That is, a large number of light projecting portions 29 and light receiving portions 31 are vertically arranged so as to sandwich the V groove 3, and the highest light receiving portion 31 which receives the light beam from the light projecting portion 29 is arranged. The position is input as an electric signal to the calculating means 33, and the calculating means 33 calculates the length S ₁ from the corner portion 13 of the V groove 3 to the lower surface of the material W and calculates the angle of the V groove 3 as well. , And the material diameter D is calculated based on the length S ₁ .

Since the length S ₁ to the lower surface of the material W is detected in a non-contact state, no error due to wear or damage due to contact of the measuring element occurs.

Although not shown in the drawings, the detection means measures the amount of movement of the gauge contacting the lower surface of the material with respect to the corner portion of the V groove by enlarging it with a helper or the like. Various well-known means such as mechanical means, electrical means, or optical for optically enlarging and measuring can be used without trouble.

Further, the shapes of the corner portions 13 and 25, which are the measurement reference points of the lengths S ₁ and S ₂ , do not have to be rectangular as in the above illustrated example, and are convenient for forming the V grooves 3 and 23. Therefore, for example, even if it is formed in a U-shaped groove, the intersecting line (imaginary intersecting line) of the two inclined planes forming the V-shaped grooves 3 and 23 is defined as the measurement reference of the lengths S ₁ and S ₂ . As a point, the length from this measurement reference point to the lower surface of the material W is measured, or the length from a fixed position to the lower surface of the material W is measured with respect to the measurement reference point, and the length is measured. It suffices to calculate S ₁ and S ₂ .

[0034]

[Effect of the device]

 As described above, according to the present invention, the material diameter is calculated by the calculating means based on the angle of the V groove and the value detected by the detecting means, and this detecting operation is performed at the position not on the material transfer line. Since the material is placed on the receiving part, there is no risk of damage to the detection means due to contact with the material when handling the material.

Since the detection operation is performed at a position that is not on the material transfer line, timing control for stopping the material transfer operation and the detection operation is completely unnecessary, and the control mechanism may be simple.

The detection means may be configured to detect the length by the contact of the probe with the lower surface of the material, or to detect the length without contacting the position of the lower surface of the material. This makes it possible to easily measure the diameter of the placed material.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a material diameter measuring device of the present invention.

FIG. 2 is an enlarged front view of a main part in FIG.

FIG. 3 is an enlarged front view of the essential parts of the second embodiment of the present invention.

FIG. 4 is an enlarged document view of an essential part of the third embodiment of the present invention.

FIG. 5 is a front view showing an example of a conventional material diameter measuring device.

[Explanation of symbols]

3,23 V groove 5,21 Material receiving portion 7 Linear gauge (detecting means) 13,25 Corner portion 15,33 Computing means 27 Photoelectric detector (detecting means) W Material S ₁ , S ₂ Length D Material diameter

Claims (3)

[Scope of utility model registration request] 1. A length measuring device for measuring a diameter of a material having a circular outer shape,
A material receiving portion having a V groove for mounting the material at a position not on the material transfer line, a detection means for detecting a length from a corner portion of the V groove to the lower surface of the material placed above, and this detection An apparatus for measuring a material diameter, comprising: an arithmetic means for calculating the material diameter based on a value. 2. The material diameter measuring apparatus according to claim 1, wherein the detecting means is configured to detect the length by contact of a measuring element with a lower surface of the material. 3. The material diameter measuring device according to claim 1, wherein the detecting means is configured to detect the length without contacting the position of the lower surface of the material.