JP3154363B2 - Mold density inspection method - Google Patents
Mold density inspection methodInfo
- Publication number
- JP3154363B2 JP3154363B2 JP30742393A JP30742393A JP3154363B2 JP 3154363 B2 JP3154363 B2 JP 3154363B2 JP 30742393 A JP30742393 A JP 30742393A JP 30742393 A JP30742393 A JP 30742393A JP 3154363 B2 JP3154363 B2 JP 3154363B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- emitting device
- density
- laser
- laser emitting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims description 14
- 238000007689 inspection Methods 0.000 title claims 2
- 239000002245 particle Substances 0.000 claims description 9
- 239000011819 refractory material Substances 0.000 claims description 3
- 230000001678 irradiating effect Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
Landscapes
- Length Measuring Devices By Optical Means (AREA)
- Lasers (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、耐火材粒子により構成
される生型、シェル型等の鋳型の密度を検査する方法に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for inspecting the density of a mold, such as a green mold or a shell mold, composed of refractory particles.
【０００２】[0002]
【従来技術と課題】従来、鋳型の品質を表示する手段と
して鋳型の硬度、強度および通気度を用いていたが、こ
れらを測定するには、各種の計測器を鋳型に押し当てる
などして計測器を鋳型に直接接触させて行う必要があ
り、その結果、鋳型を損傷・破損させたりするなどの問
題があった。本発明は上記の事情に鑑みてなされたもの
で、鋳型の品質を表示する手段の一つである鋳型の密度
を、測定器を鋳型に直接接触させることなく検査するこ
とができる方法を提供することを目的とする。2. Description of the Related Art Conventionally, the hardness, strength and air permeability of a mold have been used as a means for indicating the quality of the mold. However, these can be measured by pressing various measuring instruments against the mold. It is necessary to perform the process by bringing the vessel into direct contact with the mold, and as a result, there are problems such as damage and breakage of the mold. The present invention has been made in view of the above circumstances, and provides a method capable of inspecting the density of a mold, which is one of means for indicating the quality of a mold, without directly contacting a measuring instrument with the mold. The purpose is to.
【０００３】[0003]
【課題を解決するための手段】上記の目的を達成するた
めに第１発明における鋳型密度検出方法は、耐火材粒子
により構成される鋳型の密度を検査する方法であって、
レーザ発射装置により鋳型表面上にレーザビームを照射
するとともに鋳型表面上のレーザスポットを受光器によ
って観測しながらレーザ発射装置および受光器を一体的
に前記鋳型表面に沿って所定距離移動させ、このレーザ
発射装置および受光器が所定距離移動する間に、前記受
光器がレーザスポットを観測することができない回数を
カウントし、もって、鋳型の密度を検査することを特徴
とする。Means for Solving the Problems To achieve the above object, a method for detecting a mold density according to the first invention is a method for inspecting the density of a mold composed of refractory material particles,
While irradiating a laser beam on the mold surface with a laser emitting device and observing a laser spot on the mold surface with a light receiving device, the laser emitting device and the light receiving device are integrally moved a predetermined distance along the mold surface, and the laser While the launching device and the light receiver move a predetermined distance, the number of times the light receiver cannot observe the laser spot is counted, and the density of the mold is inspected.
【０００４】また、第２発明における鋳型密度検出方法
は、耐火材粒子により構成される鋳型の密度を検査する
方法であって、レーザ発射装置により鋳型表面上にレー
ザビームを照射するとともに鋳型表面上のレーザスポッ
トを受光器によって観測しながらレーザ発射装置および
受光器を一体的に前記鋳型表面に沿って所定距離移動さ
せ、このレーザ発射装置および受光器が所定距離移動す
る間に、レーザ発射装置と前記鋳型表面との間の距離の
変化を測定して鋳型表面の凹凸程度を検出し、もって、
鋳型の密度を検査することを特徴とする。A mold density detecting method according to a second aspect of the present invention is a method for inspecting the density of a mold composed of refractory particles. The method includes irradiating a laser beam onto a mold surface with a laser emitting device, While observing the laser spot with a light receiver, the laser emitting device and the light receiver are integrally moved along the mold surface by a predetermined distance, and while the laser emitting device and the light receiver move by a predetermined distance, the laser emitting device and By measuring the change in distance between the mold surface and detecting the degree of unevenness of the mold surface, with,
It is characterized by inspecting the density of the mold.
【０００５】[0005]
【実施例】以下、本発明の一実施例について図１〜図３
に基づき詳細に説明する。正面図である図１に示すよう
に、鋳型１の上方に配設したレーザ発射装置２から、密
度を検出すべき鋳型１の表面にレーザビーム３を照射す
るとともに、レーザビーム３が鋳型１上に形成する光学
的マークのレーザスポット４を、レーザ発射装置２に付
設した受光器５により観測する。そして、左側面図であ
る図２に示すように、レーザ発射装置２および受光器５
を鋳型１上面に沿って矢印方向へ水平に移動させるとと
もに、そのレーザスポット４を受光器５により観測す
る。この観測結果を図示しない記録器により記録して表
示すると、例えば、図３で示すようなグラフになる。な
お、図３において、横軸にはレーザ発射装置２および受
光器５の移動距離を、また縦軸にはレーザ発射装置２と
レーザスポット４との間の距離を採る。1 to 3 show an embodiment of the present invention.
This will be described in detail based on FIG. As shown in FIG. 1 which is a front view, a laser emitting device 2 disposed above a mold 1 irradiates a laser beam 3 onto a surface of the mold 1 whose density is to be detected, and the laser beam 3 The laser spot 4 of the optical mark formed on the laser emitting device 2 is observed by the light receiving device 5 attached to the laser emitting device 2. Then, as shown in FIG. 2 which is a left side view, the laser emitting device 2 and the light receiving device 5
Is moved horizontally in the direction of the arrow along the upper surface of the mold 1, and the laser spot 4 is observed by the light receiver 5. When this observation result is recorded and displayed by a recorder (not shown), for example, a graph as shown in FIG. 3 is obtained. In FIG. 3, the horizontal axis represents the moving distance of the laser emitting device 2 and the light receiver 5, and the vertical axis represents the distance between the laser emitting device 2 and the laser spot 4.
【０００６】このグラフにおいて、Ｎは、鋳型１表面に
おける耐火材粒子の詰まり具合が悪くレーザビーム３が
耐火材粒子間を通過して鋳型１内に進入するため、受光
器５がレーザスポット４を観測することができなかった
ことを示し、このＮの数は鋳型１表面の密度により異な
る。したがって、このＮの数をカウントすることによ
り、鋳型１表面の充填状態すなわち密度を間接的に検査
することができることとなる。In this graph, N indicates that the laser beam 3 passes between the refractory particles and enters the mold 1 because the degree of clogging of the refractory material particles on the surface of the mold 1 is poor. This indicates that the number could not be observed, and the number of N differs depending on the density of the surface of the template 1. Therefore, by counting the number of N, the filling state, that is, the density on the surface of the mold 1 can be indirectly inspected.
【０００７】なお、上記の実施例は、受光器５がレーザ
スポット４を観測できない部分がある場合のものである
が、レーザスポット４をほとんど全部観測することがで
きるにもかかわらず、鋳型１表面に密度の相違が見られ
る場合には、前記レーザ発射装置２および受光器５を用
いてレーザ発射装置２と鋳型１表面との間の距離Ｄを複
数回測定し（図２参照）、その測定値に基づき標準偏差
を算出する。この標準偏差に基づき鋳型１表面の凹凸程
度を検出することにより、鋳型１表面の密度を間接的に
検査することができる。In the above-described embodiment, the photodetector 5 has a portion where the laser spot 4 cannot be observed. In the case where there is a difference in density, the distance D between the laser emitting device 2 and the surface of the mold 1 is measured a plurality of times using the laser emitting device 2 and the light receiver 5 (see FIG. 2), and the measurement is performed. Calculate the standard deviation based on the value. By detecting the degree of irregularities on the surface of the mold 1 based on the standard deviation, the density of the surface of the mold 1 can be indirectly inspected.
【０００８】[0008]
【発明の効果】以上の説明から明らかなように第１の発
明は、耐火材粒子により構成される鋳型の密度を検査す
る方法であって、レーザ発射装置により鋳型表面上にレ
ーザビームを照射するとともに鋳型表面上のレーザスポ
ットを受光器によって観測しながらレーザ発射装置およ
び受光器を一体的に前記鋳型表面に沿って所定距離移動
させ、このレーザ発射装置および受光器が所定距離移動
する間に、前記受光器がレーザスポットを観測すること
ができない回数をカウントし、もって、鋳型の密度を検
査するようにし、また、第２の発明は、耐火材粒子によ
り構成される鋳型の密度を検査する方法であって、レー
ザ発射装置により鋳型表面上にレーザビームを照射する
とともに鋳型表面上のレーザスポットを受光器によって
観測しながらレーザ発射装置および受光器を一体的に前
記鋳型表面に沿って所定距離移動させ、このレーザ発射
装置および受光器が所定距離移動する間に、レーザ発射
装置と前記鋳型表面との間の距離の変化を測定して鋳型
表面の凹凸程度を検出し、もって、鋳型の密度を検査す
ることができるなどの優れた効果を奏する。As is apparent from the above description, the first invention is a method for inspecting the density of a mold composed of refractory particles, and irradiating a laser beam onto a mold surface with a laser emitting device. While observing the laser spot on the mold surface with the light receiver, the laser emitting device and the light receiver are integrally moved along the mold surface by a predetermined distance, and while the laser emitting device and the light receiver move by a predetermined distance, The number of times that the light receiver cannot observe the laser spot is counted, and the density of the mold is inspected. The second invention is a method of inspecting the density of the mold composed of refractory particles. Laser beam is irradiated on the mold surface by a laser emitting device, and the laser spot is observed on the mold surface by a light receiver. A launching device and a receiver are integrally moved along the mold surface by a predetermined distance, and while the laser emitting device and the receiver move a predetermined distance, a change in a distance between the laser emitting device and the mold surface is changed. An excellent effect is obtained such that the degree of irregularities on the surface of the mold can be detected by the measurement and the density of the mold can be inspected.
【図１】本発明の一実施例を示す概略正面図である。FIG. 1 is a schematic front view showing one embodiment of the present invention.
【図２】図１の左側面図である。FIG. 2 is a left side view of FIG.
【図３】測定結果を示すグラフである。FIG. 3 is a graph showing measurement results.
１ 鋳型 ２ レーザ発射装置 ４ レーザスポット ５ 受光器 DESCRIPTION OF SYMBOLS 1 Mold 2 Laser emitting device 4 Laser spot 5 Receiver
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭57−50643（ＪＰ，Ａ) 特開 昭57−108636（ＪＰ，Ａ) 特開 平２−165842（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B22C 9/00 G01B 11/00 - 11/30 G01N 15/08 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-57-50643 (JP, A) JP-A-57-108636 (JP, A) JP-A-2-165842 (JP, A) (58) Investigation Field (Int.Cl. 7 , DB name) B22C 9/00 G01B 11/00-11/30 G01N 15/08
Claims (2)
を検査する方法であって、レーザ発射装置により鋳型表
面上にレーザビームを照射するとともに鋳型表面上のレ
ーザスポットを受光器によって観測しながらレーザ発射
装置および受光器を一体的に前記鋳型表面に沿って所定
距離移動させ、このレーザ発射装置および受光器が所定
距離移動する間に、前記受光器がレーザスポットを観測
することができない回数をカウントし、もって、鋳型の
密度を検査することを特徴とする鋳型密度検査方法。1. A method for inspecting the density of a mold composed of refractory material particles, wherein a laser beam is irradiated on the mold surface by a laser emitting device and a laser spot on the mold surface is observed by a light receiver. The laser emitting device and the light receiver are integrally moved along the mold surface by a predetermined distance, and the number of times that the light receiving device cannot observe the laser spot during the movement of the laser emitting device and the light receiver by a predetermined distance. A mold density inspection method, comprising counting and then inspecting the density of a mold.
を検査する方法であって、レーザ発射装置により鋳型表
面上にレーザビームを照射するとともに鋳型表面上のレ
ーザスポットを受光器によって観測しながらレーザ発射
装置および受光器を一体的に前記鋳型表面に沿って所定
距離移動させ、このレーザ発射装置および受光器が所定
距離移動する間に、レーザ発射装置と前記鋳型表面との
間の距離の変化を測定して鋳型表面の凹凸程度を検出
し、もって、鋳型の密度を検査することを特徴とする鋳
型密度検査方法。2. A method for inspecting the density of a mold composed of refractory particles, wherein a laser beam is irradiated on the mold surface by a laser emitting device and a laser spot on the mold surface is observed by a light receiver. The laser emitting device and the light receiver are integrally moved along the mold surface by a predetermined distance, and the distance between the laser emitting device and the mold surface changes while the laser emitting device and the light receiver move by a predetermined distance. And measuring the density of the mold by detecting the unevenness of the surface of the mold by measuring the density of the mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30742393A JP3154363B2 (en) | 1993-11-12 | 1993-11-12 | Mold density inspection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30742393A JP3154363B2 (en) | 1993-11-12 | 1993-11-12 | Mold density inspection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07132345A JPH07132345A (en) | 1995-05-23 |
| JP3154363B2 true JP3154363B2 (en) | 2001-04-09 |
Family
ID=17968884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30742393A Expired - Fee Related JP3154363B2 (en) | 1993-11-12 | 1993-11-12 | Mold density inspection method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3154363B2 (en) |
-
1993
- 1993-11-12 JP JP30742393A patent/JP3154363B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07132345A (en) | 1995-05-23 |
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