JPH0724197Y2 - Machining hole inspection device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a machined hole inspection apparatus for inspecting the presence or absence of a groove such as a circlip groove of a workpiece in a machine tool together with a hole inspection.

[Conventional technology]

In the production line according to the conventional technique, the presence or absence of a groove such as a circlip groove in the workpiece after the predetermined cutting is not inspected.

[Problems to be solved by the device]

In the production line like the above-mentioned conventional technology, if there is no inspection for the presence of grooves such as circlip grooves in the workpiece after the predetermined cutting, if a defective product occurs due to wear or chipping of the bite, all There was a problem that it was discovered after the processing of No. 1 was finished or defective products flowed to the subsequent process.

Therefore, if an attempt is made to inspect the presence or absence of general grooves such as circlip grooves in a production line, it is necessary to install a dedicated inspection station and jigs are added, which leads to an increase in cost.

[Means for Solving the Problems]

The machined hole inspection device of the present invention comprises a sensor on the outer peripheral surface facing the inner peripheral surface of the hole to be inspected, and a hole diameter inspection head that can be inserted into the hole to be inspected and a hole to be inspected. A groove detecting device for detecting a groove formed on a peripheral surface is provided on a member that integrally advances and retracts in the axial direction, and the groove detecting device together with the hole diameter measuring head in a substantially parallel state. A bell-crank-shaped detection arm pivotally mounted such that a tip end portion thereof that can be inserted into a measurement hole can be displaced substantially in a radial direction and a base end portion thereof can be displaced substantially in an axial direction. A groove confirmation claw that is provided on the outer side of the distal end portion and that is engageable with the groove, and a drive device that is connected to the detection arm so as to displace and drive the base end portion of the detection arm in the axial direction via an elastic member. And a detector for detecting the presence or absence of a predetermined axial displacement of the base end of the detection arm.

[Action]

In the above-described machined hole inspection device, when the member that advances and retracts in the axial direction advances to a predetermined position, the hole diameter inspection head and the tip end of the detection arm of the groove detection device are both inserted into the inspection hole, The sensor of the diameter measuring head faces the inner peripheral surface of the hole to be measured, and the groove checking claw at the tip of the detection arm faces the groove of the inner peripheral surface of the hole to be measured.

The drive device is actuated to rotate the tip end of the detection arm so as to spread in the radial direction of the hole to be measured. That is, the groove checking claw is displaced toward the groove of the hole to be measured.

At that time, if the groove of the hole to be inspected is present normally, the tip of the groove confirmation claw is not disturbed until it engages with the groove, so the base end of the detection arm is displaced in the predetermined axial direction. Is detected by the detector, and it is confirmed that the groove processing of the hole to be measured is normal.

If the groove of the hole to be inspected does not exist normally, the tip of the groove check claw comes into contact with the peripheral surface of the hole to be inspected and further displacement of the groove check claw is prevented and Also prevents the detection arm from rotating. As a result, since the predetermined displacement in the axial direction of the base end portion of the detection arm is not detected by the detector, it is confirmed that the groove processing of the hole to be inspected is abnormal.

At the same time as checking the groove for normality / abnormality, the diameter of the hole is determined by the sensor of the hole diameter inspection head inserted into the hole to be inspected up to the predetermined inspection position together with the tip of the detection arm. To be inspected.

When the processing hole inspection is completed, the drive device returns to return the detection arm to its original state, and the member that advances and retracts in the axial direction retracts to the original position, and the tip of the detection arm of the hole diameter inspection head and groove detection device. Both the parts are taken out from the hole to be measured.

[Embodiment] An embodiment of the present invention will be described with reference to the drawings.

In the machined hole inspection device, as shown in FIGS. 1 and 2, the bed 1 is provided with guide rods 2, 2 which are parallel to each other, and the groove detection head 3 and the hole diameter inspection head 4, The carriage 5 to which 4 is mounted is supported by the guide rods 2, 2 and is slidable in the axial direction. A fluid pressure cylinder 6 is provided at the rear end of the bed 1 in the axial direction, and the tip of a piston rod 61 thereof is connected to the carriage 5. Then, the front end of the bed 1 is provided with an adjustable screw stopper 51 that regulates the forward movement position of the carriage 5.

On the upright portion 52 at the front end of the carriage 5, hole diameter measuring heads 4 and 4 are axially mounted parallel to each other with the groove detecting head 3 as the center.

The groove detecting head 3 will be described. As shown in FIGS. 1 and 3 to 5, the groove detecting head main body 7 sandwiches the upright portion 52 on the front surface of the upright portion 52, and the fluid pressure cylinder 8 sandwiches the upright portion 52 on the rear surface thereof. Both are axially fixed in a coaxial relationship. The piston rod 81 of the fluid pressure cylinder 8 penetrates the center hole 71 of the groove detection head body 7 and projects from the tip end surface of the groove detection head body 7.
Pressure switch actuating nozzles 9, 9 are fixed to both ends of the groove detection head main body 7 in parallel with each other in the axial direction with the piston rod 81 as the center, and the end face of each nozzle 9 is a reference sheet. Functions as 91. The ejection hole 92 of each nozzle 9 is connected to a pressure switch (not shown) through each ventilation hole 72 of the groove detection head body 7.

On both sides of the front portion of the groove detecting head body 7, there are formed protruding arm portions 10, 10 having a fork-like tip toward the front by expanding outward.
The bell crank 11 is attached to the fork-shaped tip of each protruding arm 10.
Is pivotally attached. An inward hook-shaped groove checking claw 12 is fixed to the tip of each bell crank 11, and an inner end thereof is also engaged with each engaging rod 3 fixed to the tip of the piston rod 81 in the axial direction. .

Explaining the engagement structure, the mounting head 82 integrally formed at the tip of the piston rod 81 is provided with vertically parallel implant holes 83, 83 in the axial direction. Each implantation hole 83
The bases of the engaging rods 13 are fitted into the respective fitting holes, are screwed into the mounting heads 82 in the radial direction of the respective implantation holes 83, and are fixed by the tightening screws 14.

Fixing piece 15 fixed to the tips of both engaging rods 13 and 13 and both engaging rods 1
A compression spring (17) is fitted on each engaging rod (13) between the sliding piece (16) loosely fitted on the engaging rods (3, 13) and at the same time, each engaging rod (13).
A flat notch 131 in the axial direction is formed on each of the members 13 so as to face each other. Thus, the inner end of each bell crank 11 is engaged with each notch 131 between the mounting head 82 and the sliding piece 16.

Therefore, when the piston rod 81 is extended, the inner end of the bell crank 11 is pressed in the forward direction by the mounting head 82, and the tip ends of both bell cranks 11 and 11, that is, the groove check claws 12,
It will be expanded between 12th. Then, when the piston rod 81 is retracted, the inner end of the bell crank 11 is
Until at least a predetermined spring force of the compression spring 17 abuts the tip surface of the nozzle 9 that is the reference sheet 91.
The fixing piece 15 presses it in the backward direction via the compression spring 17 and the sliding piece 16, and the ends of the bell cranks 11, that is, the groove checking claws 12, 12 are contracted and closed. Then, Bell Crank 11
The contact of a part of the nozzle with the tip surface of the nozzle means that the ejection hole 92 is closed, and when the ejection hole 92 is closed, a pressure switch (not shown) connected to the ventilation hole 72 is closed. Has become.

The hole diameter measuring head 4 will be described. As shown in FIGS. 1, 3, and 4, the support shaft 181 of the damper mechanism 18 axially fixed to the back surface of the upright portion 52 is the upright portion 52. A hole diameter measuring head main body 19 is attached to the front end of the hole diameter measuring head main body 19. The damper mechanism 18 moves the inspection head body 19 backward when the inspection head body 19 does not enter the inspection hole H because the hole diameter of the inspection hole H of the workpiece W is small. A spring etc. is installed to let it escape.

The hole diameter inspection head main body 19 has a cylindrical shape that can be inserted into the hole H to be inspected of the workpiece W, and a part of the inner peripheral surface is a flat surface portion 191 in the axial direction. An electric coil type sensor 20 is provided on the cylindrical surface portion, and a measurement signal is sent to a measuring device (not shown) via a conductor 21. The bell crank 11 and the groove confirmation claw 12 of the groove detection head 7 are adjacent to the flat surface portion 191, so that the hole diameter inspection head body 19 and the groove confirmation claw 12 can be simultaneously inserted into the hole H to be measured. It has become.

The operation and operation of the above-described machined hole inspection device will be described.

First, the piston rod 61 of the fluid pressure cylinder 6 is in a retracted state, and the piston rod 81 of the fluid pressure cylinder 8 is in an extended state.

When the fluid pressure cylinder 6 is operated to extend the piston rod 61, the carriage 5 advances to a predetermined position where it abuts the screw stopper 51. Then, the groove checking claw 12 of the groove detecting head 3 and the hole diameter measuring head 4 adjacent to the groove detecting head 3 simultaneously penetrate the guide sleeve S and are held in a predetermined position in the hole W to be measured of the workpiece W held at a predetermined position. When it reaches the depth, the tip of the groove checking claw 12 is located at a position facing the circlip groove C of the processing hole H.

Then, when the fluid pressure cylinder 8 is operated to retract the piston rod 81, the engaging rod 12, that is, the fixed piece 15 is retracted, and the inside of both bell cranks 11, 11 via the compression spring 17 and the sliding piece 16. Since the end is pushed in the axial direction, both bell cranks 11,11
Are rotated in opposite directions, and the ends of the bell cranks 11, that is, the groove check claws 12, 12 are contracted.

At that time, if a predetermined circlip groove C exists in the hole H to be measured of the workpiece W, the displacement of the tip of the groove checking claw 12 is not disturbed, and a part of the bell crank 11 becomes a reference sheet. The bell crank 11 can rotate until it comes into contact with the tip surface of the nozzle 9 which is 91 with at least a predetermined spring force of the compression spring 17. As a result, the ejection hole 92 is closed by the bell crank 11 and the ejection of compressed air is stopped, so a pressure switch (not shown) is closed via the ventilation hole 72, and a circlip groove presence signal is output by an appropriate device. , It is accurately confirmed that the workpiece W is normal.

If the predetermined circlip groove C does not exist in the hole to be measured H of the workpiece W, the tip of the groove checking claw 12 abuts on the peripheral surface of the hole to be measured H to check the groove. Further displacement of 12 is prevented, and thus rotation of the bell crank 11 is also prevented. As a result, part of the bell crank 11 is
No contact with the tip end surface of the nozzle 9 and the ejection hole 92 is not blocked by the bell crank 11 and the ejection of compressed air cannot be stopped. Therefore, a pressure switch (not shown) remains an open contact, and a circlip groove exists. No signal is output, confirming that the workpiece W is abnormal.

The hole diameter inspection is performed at the same time as the existence confirmation inspection of the circlip groove C. As described above, the hole diameter inspection head 4 is positioned at an appropriate inspection position by the advance of the carriage 5. Then, the hole diameter is measured by the sensor 20 of the hole diameter measuring head 4 facing the inner peripheral surface of the hole, and the measurement signal is sent to the measuring device (not shown) via the lead wire 21.

After the inspection of the machined hole of the workpiece W, each fluid pressure cylinder 6,8
Needless to say, the above-mentioned operation is performed in reverse to the above-mentioned operation, and each part of the apparatus returns to the original position / state.

[Effect of device]

According to this invention, the presence or absence of a groove such as a circlip groove in a workpiece before a predetermined grinding process can be inspected in a production line without installing a dedicated inspection station. As a result, there is no increase in space or jig.

[Brief description of drawings]

FIG. 1 is a partial sectional plan view of a machined hole inspection apparatus according to an embodiment of the present invention, FIG. 2 is a front view of the same, FIG. 3 is an enlarged partial view of FIG. 1, and FIG. 3 is a partial sectional view taken along line IV-IV of FIG. 3, and FIG. 5 is a partial sectional view taken along line VV of FIG. 1: Bed, 2: Guide rod, 3: Groove detecting head 4: Hole diameter measuring head, 5: Reciprocating table, 51: Screw stopper 52: Upright part, 6, 8: Fluid pressure cylinder 61, 68: Piston rod, 7: Groove detection head body, 71: Center hole 72: Vent hole, 82: Mounting head, 83: Implant hole 9: Pressure switch actuating nozzle, 91: Reference sheet 92: Jet hole, 10: Projecting arm part, 11 : Bell crank 12: Groove check claw, 13: Engagement rod, 131: Notch 14: Tightening screw, 15: Fixed piece, 16: Sliding piece 17: Compression spring, 18: Damper mechanism, 19: Hole diameter inspection Head body 191: Flat part, 20: Sensor, 21: Conductor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Tatsumi Kaetsu, Toyota-cho, Toyota-cho, Toyota-shi, Aichi Prefecture, Japan (56) References: Actual public Sho 60-35533 (JP, Y2)

Claims (1)

[Scope of utility model registration request] 1. A hole diameter measuring head that can be inserted into the hole to be measured, and a sensor that is provided on the outer peripheral surface of the sensor to face the inner surface of the hole to be measured, and the inner peripheral surface of the hole to be measured. A groove detecting device for detecting the formed groove is integrally provided on a member that moves forward and backward in the axial direction, and the groove detecting device is in parallel with the hole diameter measuring head together with the hole to be measured. A bell-crank-shaped sensing arm pivotally mounted such that the distal end thereof can be displaced substantially in the radial direction and the proximal end can be displaced in the substantially axial direction, and the outer side of the distal end of the sensing arm. And a drive device connected to the detection arm so as to displace and drive the base end portion of the detection arm in the axial direction via an elastic member, the groove confirmation pawl being engageable with the groove. A machined hole inspection device comprising a detector for detecting the presence or absence of a predetermined axial displacement of a base end portion of an arm.