JP3973781B2 - Parts presence detection device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a component presence detection device that detects the presence of a component that is assembled to a workpiece, and particularly relates to a component presence detection device that can detect the presence of a plurality of components.
[0002]
[Prior art]
Conventionally, when a part is press-fitted into a workpiece by a processing device using a press-fitting device or the like, an operator has confirmed whether or not the component is set on the workpiece by visual observation. For example, when a valve guide and a valve seat are press-fitted into an engine cylinder head, whether or not the operator has set the valve guides and valve seats on all intake valves and exhaust valves in the engine cylinder head. It was confirmed visually and the cylinder head was positioned on the mounting table of the press-fitting device.
[0003]
[Problems to be solved by the invention]
However, in confirming the affiliation of parts to be mounted on such conventional workpieces, the operator's attention is dulled in continuous processing by a series of flow operations, etc. There was a possibility of overlooking the part that was not set or the part that was not set correctly.
[0004]
Also, for example, when a plurality of valve guides are press-fitted into the engine cylinder head, the set valve guides protrude from the engine of a predetermined size, so there are places hidden from the operator's line of sight, and forgetting to set the places. And there was a risk of overlooking the set.
[0005]
As described above, when the work such as press-fitting is performed on the work in a state where no parts are set on the work, there is a problem that the work may be damaged by the press-fitting head or the like.
[0006]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a component presence detection device that can cope with such problems and can detect the presence of a component that is assembled to a workpiece before processing the workpiece.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 detects the presence of a plurality of valve guides press-fitted into the upper surface of the cylinder head, and press-fitting into the lower surface of the cylinder head inverted upside down by the reversing device. the component enrolled detecting device for detecting the enrolled multiple valve sheets, fine light projected onto the object to be detected, a plurality of optical fiber sensor for detecting the presence or absence of an object to be detected by receiving the reflected light Driving means that is supported by a support frame fixed to a frame of a press working apparatus for press-fitting the valve guide and the valve seat, and that causes the optical fiber sensor to approach and separate in the vertical direction with respect to the upper surface or the lower surface of the cylinder head; the provided, said plurality of optical fiber sensor, viewed from the upper and lower surfaces of the vertical direction of the cylinder head, the valve guide and valve Disposed at a position over bets are overlapped, by close vertically spaced optical fiber sensor with respect to the upper surface or lower surface of the cylinder head by the driving means, a plurality of valve guide that is positioned below the optical fiber sensor Alternatively, it is characterized by detecting the presence of a valve seat .
[0008]
According to this configuration, the presence of a plurality of components attached to the workpiece is detected by the optical fiber sensor that is brought close to the workpiece by the driving means .
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in FIG. 1, the multi-tasking machine to which the component presence detection device of this embodiment is applied includes a press working device 1, a reversing device 2, a transfer device 3, a transfer device 19, and a component presence detection device 20. The workpiece whose surface is pressed by the press working device 1 is transported to the reversing device 2 by the transfer device 19, the front and back are reversed by the reversing device 2, and then again the transport device. 3 is conveyed to the press working apparatus 1 to press the back surface. And before the surface processing of a workpiece | work and before a back surface processing, the registration in the workpiece | work of the components assemble | attached to a workpiece | work is detected by the component registration detector 20. These series of operations are controlled by the control panel 4.
[0013]
As shown in FIG. 3, the workpiece subjected to press working by the press working apparatus 1 is a cylinder head 100 into which a valve guide 101 and a valve seat 102 are press-fitted. The cylinder head 100 is used for an in-line 6-cylinder engine, and two intake valves and two exhaust valves are provided for each cylinder. Further, a guide press-fitting portion 103 as a hole into which a valve guide 101 for guiding a shaft portion of an intake / exhaust valve (not shown) is press-fitted, and a hole into which a valve seat 102 abutting on the umbrella portion of the intake / exhaust valve is press-fitted A sheet press-fit portion 104 is formed. The intake / exhaust valves are arranged along a straight line (see FIG. 4) inclined by a predetermined angle θ with respect to the cylinder row direction in consideration of swirl generation and the like. Further, a side wall 106 is extended around the upper surface of the cylinder head 100 (upper side in the drawing in which the valve guide 101 is press-fitted) so that a bearing portion 105 that supports a camshaft (not shown) does not protrude from the end surface. As shown, the lower surface and the upper surface of the cylinder head 100 are formed in a shape that is not parallel.
[0014]
The press working apparatus 1 press-fits the valve guide 101 in a state where the guide press-fitting portion 103 of the cylinder head 100 is positioned upward (hereinafter referred to as “upright state”), and a state where the seat press-fitting portion 104 is positioned upward (hereinafter referred to as “upright state”). This is a press-fitting device for press-fitting the valve seat 102 in an “inverted position”.
[0015]
For this reason, as a press-fitting head, a guide press-fitting tool 5 for valve guide press-fitting and a seat press-fitting tool 6 for valve seat press-fitting and caulking are provided, and a slide plate 7 on which these are arranged is slid by a cylinder 8, A press-fit load applied from the press ram 9 is selected. That is, when the cylinder head 100 is in the upright position, the guide press-fitting tool 5 is positioned below the press ram 9, and when inverted, the cylinder 8 is operated so that the sheet press-fitting tool 6 is positioned below the press ram 9. Let
[0016]
The reversing device 2 has a side wall 10 formed in a cylindrical shape, and reverses the cylinder head 100 transported therein by the transfer device 19 from an upright state to an inverted state. That is, the chain 11a wound around the outer peripheral surface of the side wall 10 is driven by the drive source 11 to rotate the side wall 10, thereby reversing the cylinder head 100 stored therein.
[0017]
In addition, two guide rails 13b extending in the direction in which the cylinder head 100 is carried in and out are disposed inside, and these guide rails 13b are arranged at the rotation end of the side wall 10 (when rotating from an upright state to an inverted state). Or a stop position when rotated from an inverted state to an upright state) and is formed so as to form a straight line with a guide rail 13a on the press working apparatus 1 side described later.
[0018]
The transport device 3 transports the cylinder head 100 placed on the pallet 18, and in particular, transport between the transport device 3 and the reversing device 2 is performed by a transfer device. The transfer device includes a transfer bar 12, a drive cylinder 14 that moves the transfer bar 12 back and forth, a guide rail 13 that is arranged in parallel to the transfer bar 12, a bracket 15 that supports the rear end of the transfer bar 12, A connecting means 16 that slides on a support rail, which will be described later, while being supported by the guide rail 13, and a support rail (not shown) that is disposed in parallel with the guide rail 13 and is fixed to the apparatus frame. .
[0019]
The component presence detection device 20 includes an optical fiber sensor 21 and a drive cylinder 22 as drive means.
The optical fiber sensor 21 detects whether the valve guide 101 and the valve seat 102 are normally registered in the guide press-fitting portion 103 and the seat press-fitting portion 104 of the cylinder head 100, respectively. The optical fiber sensor 21 is moved up and down in the drawing by the drive cylinder 22 to approach and separate from the cylinder head 100, and the drive cylinder 22 is supported by a support frame 23 fixed to the frame of the press working apparatus 1. Yes.
[0020]
Further, the optical fiber sensor 21 is arranged so as to move up and down at the position shown in FIG. 4, and the sensor sensing portions are respectively located at positions corresponding to the two valve seats 102 (four valve guides 101 in the upright state). Therefore, a plurality of these valve guides 101 or valve seats 102 can be detected simultaneously. When the cylinder head 100 is sent to the press processing apparatus 1 at a predetermined pitch for the press-fitting process, the presence of the valve guide 101 or the valve seat 102 positioned below the optical fiber sensor 21 is detected in the order of sending.
[0021]
The detection of the presence of a component is performed by projecting fine light from the optical fiber sensor 21 onto the upper end surface of the valve guide 101 or the valve seat 102 and detecting all reflected light (when the reflection angle is 180 degrees). Alternatively, it is detected that the valve seat 102 is normally enrolled. On the other hand, when the optical fiber sensor 21 does not detect the reflected light (when the reflection angle is other than 180 degrees), it is detected that the valve guide 101 or the valve seat 102 is not enrolled or is not enrolled normally.
[0022]
Further, when the optical fiber sensor 21 detects that the valve guide 101 or the valve seat 102 is not enrolled or is not enrolled normally, the detection signal is transmitted to the control panel 4 to be careful of the operator. A display to call out. In this case, the machining control may be stopped together with the display.
[0023]
Although the present embodiment has been described above, the present invention is not limited to this, and includes five or more sensing units of an optical fiber sensor to detect the presence of five or more valve guides or valve seats. May be. In this case, the number of detection units is preferably a multiple of 2 in view of the layout of the intake / exhaust valves arranged in the cylinder head.
[0024]
【The invention's effect】
Since the present invention is configured as described above, according to the component registration detecting device according to claim 1, the registration of a plurality of valve guides and valve seats attached to the cylinder head can be detected by the optical fiber sensor. Can prevent mistakes in enrollment confirmation .
[Brief description of the drawings]
FIG. 1 is a side view showing a multi-tasking machine to which a component presence detection device according to the present invention is applied. FIG. 2 is a side view showing a component presence detection device according to the present invention. FIG. 4 is a side view showing the cylinder head to be used. FIG. 4 is a top view showing the cylinder head detected by the component presence detection apparatus according to the present invention.
21 ... Optical fiber sensor 22 ... Drive cylinder (drive means)
100 ... Cylinder head 101 ... Valve guide 102 ... Valve seat

Claims (1)

This is a parts presence detection device that detects the presence of a plurality of valve guides that are press-fitted into the upper surface of the cylinder head, and detects the presence of a plurality of valve seats that are press-fitted into the lower surface of the cylinder head that is turned upside down by the reversing device . And
A plurality of optical fiber sensors that project fine light onto a detection object and receive the reflected light to detect the presence or absence of the detection object;
A driving means supported by a support frame fixed to a frame of a press working apparatus for press-fitting the valve guide and the valve seat, and causing the optical fiber sensor to approach and separate in the vertical direction with respect to the upper surface or the lower surface of the cylinder head;
Provided,
The plurality of optical fiber sensors are disposed at positions where the valve guide and the valve seat overlap when viewed from the vertical direction of the upper surface and the lower surface of the cylinder head, and the optical fiber sensors are attached to the upper surface or the cylinder head by the driving means. A component presence detection device that detects the presence of a plurality of valve guides or valve seats positioned below the optical fiber sensor by being closely spaced apart from each other in the vertical direction with respect to the lower surface .

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