JPH09122903A - Inspection instrument of casting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically execute inspection of a blind hole of a casting by supplying a ball in a bottomed hole and discriminating whether the number of balls to fill a bottomed hole is normal or abnormal. SOLUTION: Inspection of casting (a) is executed as follows, a ball B is supplied to an opening part 1a of a blind hole 1 through a guide G. The ball B supplied are detected through a sensor S and the detected signal is inputted to a detector D. When the blind hole 1 is filled with the ball B, supply of the ball is stopped thereafter. At this timing, that is, the sensor does not detect the ball B for a prescribed time, the number of the balls B detected and the number of the set value beforehand are compared. In the case the number of the balls detected and the number of the set value coincide, it is discriminated the blind hole 1 is correctly formed, and the signal to that effect is displayed to a monitor board from the detector D. Also, in the case of not reaching a prescribed number, abnormality is discriminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting product inspection apparatus for inspecting a bottomed hole, which is a so-called blind hole, formed when casting a casting product.

[0002]

2. Description of the Related Art Conventionally, for example, when a cast product is an intake manifold, a blind hole (bottomed hole) may be formed in the cast product by a core. That is, after casting, the core sand is removed to complete the blind hole, but whether the core sand is completely removed or the blind hole is formed as specified, and In order to inspect whether or not burrs are generated, inspection using a steel ball is performed.

FIG. 3 is a schematic configuration diagram of a conventional cast product in an inspection state. This casting a has a blind hole 1 curved inside.
Is provided.

For the inspection of the blind hole 1, an inspection apparatus in which a ball b of a steel ball having a diameter slightly smaller than the hole diameter of the blind hole 1 is provided at the tip of a thin flexible wire 10 made of a piano wire or the like. Is used. For example, when the diameter of the blind hole 1 is 10 mm, a ball b having a diameter of 8.5 mm is used.

The inspection is performed by an inspector inserting a ball b into the opening 1a of the blind hole 1 and further pushing the wire rod 10 into the blind hole 1. That is, if the position of the opening 1a of the wire rod 10 that does not enter further even if the wire rod 10 is pushed in is as specified, the blind hole 1 is determined to be normally formed. If the wire rod 10 stops on the way, the blind hole 1 is determined to be abnormal, and the cast product a is returned to the sand removing step or the like again.

[0006]

However, inspecting a cast product using the conventional inspection device having a ball at the tip of the above-mentioned wire rod is performed by an inspector by directly inserting the ball into a blind hole. However, the inspection efficiency is inferior because the inspection is performed by.

Therefore, the present invention has been made to solve the above-mentioned drawbacks, and an object thereof is to provide a casting product inspection apparatus capable of automatically inspecting blind holes. .

[0008]

In order to achieve the above object, a casting product inspection device according to the present invention is a casting product inspection device for inspecting a bottomed hole formed in a casting product. Ball supply means for supplying balls to the holes, detection means for detecting the number of supplied balls, and the number of detected balls when the number of the bottomed holes is a predetermined number filled with the balls. The bottom hole is determined to be normal, and when the number of detected balls is less than the predetermined number, the bottomed hole is determined to be abnormal. Further, in a casting product inspection device for inspecting a bottomed hole formed in the cast product, a ball ejection means for ejecting a ball from the bottomed hole, a detection means for detecting the number of ejected balls, and a detection means. When the number of balls formed is a predetermined number that the bottomed holes are filled with balls, it is determined that the bottomed holes are normal, and when the number of detected balls is less than the predetermined number. Has a determination means for determining the bottomed hole as abnormal.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a schematic configuration of a casting product inspection apparatus according to an embodiment. The same components as those in FIG. 3 will be described using the same reference numerals.

The casting a is the same as that shown in FIG.
That is, the blind hole 1 which is curved inside is provided in the cast product a. And this casting a is
As shown in FIG. 1, the blind hole 1 is set so that the opening 1a is at the upper position.

The guide G is located above the opening 1a,
The ball B from a ball supply mechanism (not shown) is inserted into the opening 1a.
It is configured to lead to.

The ball B used here is a steel ball having a diameter slightly smaller than that of the blind hole 1. For example, when the blind hole 1 has a diameter of 10 mm, the ball B has a diameter of 8.5 mm. To be elected.

In the figure, S is a sensor, which is provided at the lower end of the guide G and is configured so that the ball B moving from the guide G to the opening 1a can be accurately detected. As the sensor used here, a photo sensor can be used, but a sensor that detects passage of the ball B as a change in inductance can also be used. In any case, any type of sensor can be used as long as it can accurately detect the passing ball B.

The detector D comprises a counter circuit and a comparison circuit. That is, in this detector D,
An arbitrary number can be set in advance, and a detection signal can be output by comparing the set number with the number detected by the sensor S. .

The number preset in the detector D is the number when the blind hole 1 of the casting a is normally formed and the blind hole 1 is filled with the ball B, for example, 20 pieces. Is.

When the casting a is inspected by the inspection device having the above-described structure, the ball B is inserted into the opening 1a of the blind hole 1 through the guide G.
Is supplied. The supplied ball B is detected by the sensor S, and the detection signal is input to the detector D.

When the blind hole 1 is filled with the ball B, the supply of more balls is stopped. When the supply of the balls is stopped, that is, when the sensor S stops detecting the balls B for a predetermined fixed time, the number of the balls B detected until then is compared with a preset number. .

When the number of detected balls B coincides with the preset number, it is judged that the blind hole 1 is normally formed, and a signal to that effect is sent from the detector D to a monitoring board (not shown). It is output and displayed.

The inspected casting a is half-turned by a reversing mechanism (not shown) and the ball B in the blind hole 1 is discharged. Then, the discharged balls B are collected again for the inspection of the next cast product.

By the way, when the number of detected balls B is less than a preset number, that is, when core sand remains in the blind hole 1 or there is a burr in the blind hole 1 When the specified number of balls B cannot be inserted into the blind hole 1, for example, when the preset number (specified number) is 20 and the number of detected balls B is 18, the blind hole 1 is Since it is abnormal, in this case, the abnormality is displayed on the monitoring panel. The cast product a relating to the abnormality display is returned again to the sand removing process or the like.

FIG. 2 shows an apparatus for inspecting a cast product a according to another embodiment of the present invention.
The ball B is inserted in the blind hole 1, and then the number of balls B is detected by the sensor S when the casting a is half-turned and the inserted ball is discharged to the hopper H.

Also in this case, if the blind hole 1 is normally formed, the number of balls B ejected matches the specified number, and if the blind hole 1 is abnormal, the number of balls B ejected is specified. Since the number is smaller than the number, the inspection can be automatically performed in the same manner as described above.

By using the device of the present invention, it is possible to detect even if the blind hole 1 is formed longer than the specified length. Therefore, when it is necessary to detect whether or not the blind hole 1 is formed longer than the specified length in this way, the comparator circuit of the detector D detects when the number of balls larger than the specified number is detected. It is configured to deliver a detection signal.

[0023]

According to the casting product inspection apparatus of the present invention, the ball supply means for supplying the balls to the bottomed holes, the detection means for detecting the number of the supplied balls, and the detected number of the balls are When the number of the bottomed holes is a predetermined number filled with balls, the bottomed hole is determined to be normal, and when the detected number of balls is less than the predetermined number, the bottomed hole is abnormal. Or a ball discharging means for discharging the ball from the bottomed hole, a detecting means for detecting the number of the discharged balls, and a number of the detected balls is the bottomed hole. When the number of balls is a predetermined number that is filled with balls, the bottomed hole is judged to be normal, and when the number of detected balls is less than the predetermined number, the bottomed hole is judged to be abnormal. With the means, it will automatically inspect the blind hole of casting Door can be.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a casting product inspection apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a casting product inspection apparatus according to another embodiment of the present invention.

FIG. 3 is a schematic configuration diagram of a conventional cast product inspection device.

[Explanation of symbols]

 1 Bottomed hole (blind hole) 1a Opening a Cast product B Ball S Sensor D Detector G Guide H Hopper

Claims (2)

[Claims] 1. A casting product inspection apparatus for inspecting a bottomed hole formed in a cast product, comprising: a ball supply means for supplying a ball to the bottomed hole; and a detection means for detecting the number of supplied balls. When the number of detected balls is a predetermined number in which the bottomed holes are filled with balls, the bottomed holes are determined to be normal,
A casting product inspection apparatus, comprising: a determining unit that determines that the bottomed hole is abnormal when the detected number of balls is less than the predetermined number. 2. A cast product inspection apparatus for inspecting a bottomed hole formed in a cast product, comprising: a ball discharging means for discharging a ball from the bottomed hole; and a detecting means for detecting the number of discharged balls. When the number of detected balls is a predetermined number in which the bottomed holes are filled with balls, the bottomed holes are determined to be normal,
A casting product inspection apparatus, comprising: a determining unit that determines that the bottomed hole is abnormal when the detected number of balls is less than the predetermined number.