JPH09159577A - Through-hole confirmation method for machined parts and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately confirm the drilled state of a through-hole by making judgement about whether the through-hole is in a proper state on the basis of the oscillation amount of an oscillation member laid at one side of the through-hole in the axial direction thereof. SOLUTION: The piston bore 1 of a connecting rod W is coupled to a reference pin 14 and a shaft hole 2 is coupled to an air blow head 11 on a placement seat 10, thereby placing the connecting rod W at a proper inspection position. Then, an operation button is operated and the air fed from an air supply source to the air blow hole 12 of the air blow head 11 is delivered to the through-hole 3 of the connecting rod W. As a result, the air delivered to the through-hole 3 blows toward the front A of an oscillation member 16, while removing chips residual inside. Then, the delivery pressure of the air pushes the oscillation member 16 backward, and an inspection instrument 18 is actuated. Also, the indicator lamp of a display 19 is made to light with the detection signal of the instrument 18, thereby informing a worker of the proper state of the through-hole 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for confirming whether or not a through hole provided in a machined part such as a connecting rod is suitable for penetration.

[0002]

2. Description of the Related Art As a device for inspecting the state of a through hole, air is discharged into the through hole, and the device that has been used so far for inspecting the through state of the through hole by changing the air pressure at that time Even if the powder is tightly clogged in the through hole,
If there is a gap between the swarf and the through hole, it may be mistaken for the normal piercing, or the swarf may fall off after the parts are assembled, and this may get stuck between other parts. It had the inconvenience of causing trouble.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem.
It is an object of the present invention to provide a new method and apparatus for confirming the through hole of a machined part, which can accurately confirm the through state of the through hole.

[0003]

That is, according to the present invention, as a method of confirming a through hole of a machined part for achieving such a problem, the machined part supported in a regular position is
The oscillating member, which is disposed at a distance in one axial direction of the through hole, is oscillated by blowing air blown from the other of the through holes, and based on the oscillating amount of the oscillating member. , Including the support state of the machined part, to confirm the suitability of the through state of the through hole, and as a device for this, in the positioning support portion of the machined part having the through hole, A mounting table provided with an air discharge hole that matches the through hole, a swing member that is spaced apart in the axial direction of the through hole with respect to the workpiece that is positioned and supported, and the swing member. The detection means is provided behind the member with a certain swing amount.

[0004]

Embodiments of the present invention will be described below. The figure shows an apparatus according to an embodiment of the present invention used for a method of confirming the state of a through hole provided in a connecting rod.

In the figure, reference numeral 10 is a mounting table for positioning and supporting a connecting rod W which is an object to be inspected.
An air blow head 11 that fits into the shaft hole 2 of the connecting rod W is integrally formed on the upper side of the shaft 0, so that a constant pressure of air is supplied to the air blow head 11 from an air supply source (not shown). The air discharge hole 12 is formed, and the tip of the air discharge hole 12 is positioned so as to face the nozzle-shaped through hole 3 that extends obliquely outward from the inner wall surface of the shaft hole 2 of the connecting rod W. It is open.

On the other hand, the positioning member 13 provided apart from the mounting table 10 is provided with a reference pin 14 which fits into the piston pin hole 1 of the connecting rod W, and the air blow head 11 of the mounting table 10 and this. By connecting rod W
Is positioned and supported at a predetermined inspection position.

On the other hand, reference numeral 16 in the drawing denotes a swing member suspended and supported by a support member 15 so as to swing, and the swing member 16 is provided with respect to the connecting rod W positioned and supported. It is arranged on the axis of the through hole 3 and is configured to swing by receiving the discharge pressure of the air discharged from the through hole 3. A detector 18, such as a limit switch, is provided behind the swinging member 16 and comes into contact with the swinging member 16 when the swinging member 16 swings at a predetermined angle. Here, a display 19 which operates by a detection signal from the detector 18 is provided.

Next, a method of confirming the propriety of the supporting state of the connecting rod W and the propriety of the penetrating state of the through hole by using the apparatus thus constructed will be described.

First, the piston pin hole 1 of the connecting rod W is fitted to the reference pin 14, the shaft hole 2 is fitted to the air blow head 11 on the mounting table 10, and the connecting rod W is properly mounted at the inspection position. In addition, by operating an operation button (not shown), the air sent from the air supply source (not shown) to the air discharge hole 12 of the air blow head 11 is discharged to the through hole 3 provided in the connecting rod W.

As a result, the air blown into the through hole 3 is
The chips remaining inside are discharged and discharged toward the front surface A of the rocking member 16, and the discharge pressure pushes the rocking member 16 rearward to activate the detector 18, which is indicated by the detection signal. The indicator lamp of the container 19 is turned on to inform the operator that the through hole 3 is normally pierced.

On the other hand, the connecting rod W is mounted on the mounting table 10.
When the operation button is operated without being placed on the top, the air from the air discharge hole 12 is discharged as it is in the state of being diffused to the outside, which is necessary for operating the detector 18. Since the rocking member 16 cannot be rocked by an amount, the indicator lamp keeps the non-lighting state to inform the operator of this abnormal condition.

When the connecting rod W is mounted on the mounting table 10 in the opposite direction, the air from the through hole 3 is
Since the ejection is performed in a direction different from the front surface A of the swing member 16,
As before, the detection by the detector 18 is disabled.

On the other hand, when the chips remain in the through hole 3 without being blown off by the air, the air blown into the through hole 3 collides with the chips and is dispersed. The swing member 16 is not swung sufficiently, the detecting operation of the detector 18 is disabled, the operator is informed of the abnormality of the through hole, and similarly, the through hole 3 is not formed in the connecting rod W. In that case, the state can be detected from the abnormal display.

Although the above-mentioned embodiment has been described as an example in which it is applied to a connecting rod as an object to be inspected, it is obvious that the present invention can be applied to a clogging inspection of other parts having through holes. Further, as the detector of the swinging member, in addition to the limit switch, it is possible to use a non-contact type proximity switch or an optical detection switch including a light emitting element and a light receiving element. Further, when a plurality of through holes are formed in the processed part, it is possible to provide the support member of the device under test with air discharge holes corresponding to the number of these holes.

[0015]

As described above, according to the present invention, with respect to the machined component supported at the regular position, the swing member provided at one side in the axial direction is blown from the other side of the through hole. Since the air is blown and the state inside the through hole is confirmed based on the swing amount of the swing member at that time, the through hole is not provided depending on the swing amount of the swing member. In addition to being able to confirm the penetration state of the through hole such as whether there is a blockage in the through hole, it also detects whether or not the inspection object is placed and the orientation of the placement is appropriate. Further, through the confirmation operation of discharging the air into the through hole, the chips remaining inside can be discharged at the same time.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the whole of an apparatus according to an embodiment of the present invention.

[Explanation of symbols]

 10 Mounting Table 11 Air Blow Head 12 Air Discharge Hole 16 Swing Member 18 Detector W Processed Parts

Front page continuation (72) Inventor Takahiro Ota 1907 Hirata-cho, Suzuka-shi, Mie Honda Motor Co., Ltd. Suzuka Factory (72) Inventor Atsushi Nanzan 1907, Hirata-cho, Suzuka-shi, Mie Honda Suzuka Inside the factory

Claims (2)

[Claims] 1. A swinging member, which is disposed with a space on one side in the axial direction of the through hole of the processed part supported in a regular position, is blown from the other side of the through hole. It is possible to check whether the through state of the through hole is appropriate, including the supporting state of the processed part, based on the swing amount of the swinging member by blowing in the entrapped air and swinging it. The method of checking the through hole of the featured processed parts. 2. A mounting table in which a positioning support portion of a machined part having a through hole is provided with an air discharge hole matching the through hole.
An oscillating member provided in the axial direction of the through hole with respect to the processed part in a state of being positioned and supported, and a oscillating amount provided behind the oscillating member at a certain oscillating amount. A through-hole confirmation device for processed parts, which comprises a detection means.