JP3263905B2 - Rolling work abnormality detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work to be rolled on a flat rolling machine, in which the work takes an abnormal posture rising from a predetermined position or the head is eccentric. The present invention relates to a device for detecting an abnormal shape when the shape is abnormal.

[0002]

2. Description of the Related Art A work is supplied between a pair of fixed dies and a movable die having a molding die formed on a corresponding surface, and the work is rolled while being pressed between the molding dies of both dies by reciprocating motion of the movable die. The flat rolling machine that was rolled by running is used, for example, in an unmanned automatic production line for threading bolts, but due to a supply error to the flat rolling machine, etc. Bolts may be rolled between the two dies with their postures rising from a predetermined position,
In this case, the screw is not accurately cut, resulting in a defective product.

[0003] Further, the bolt may be formed into an abnormal shape in which the head of the bolt is eccentric at the stage of forging, so that even if the screw is normally cut, it naturally becomes a defective product.

Conventionally, in order to sort out such defective products, an inspection step is separately provided after a molding step using a flat rolling machine.

[0005]

Therefore, conventionally, since the inspection process must be separately provided, it is impossible to avoid a complicated and large-scale production line. In addition, since the detection of defective products is necessarily delayed, there is a risk that a large number of defective products may be produced depending on the cause. There has been a need for a device that can be quickly detected.

[0006]

SUMMARY OF THE INVENTION The abnormality detecting apparatus for a rolled work according to the present invention has been completed based on the above-mentioned demand, and has a fixed mounting member above the traveling path of the work of the flat rolling machine. The movable mounting body is mounted on the fixed mounting body so as to be rotatable around a first horizontal axis substantially parallel to the traveling direction of the work, and is mounted on the movable mounting body directly above the head of the traveling work. A detection body provided at the lower end with a first abutting portion located at a fixed position and a second abutting portion located at a fixed position on the side in the traveling direction of the head of the work is substantially the same as the traveling direction of the work. The detector is attached so as to be rotatable about a second horizontal axis at right angles, and is attached to the detection body integrally with the detection body in two directions about the first and second horizontal axes.
A detection rod that swings in the direction is protruded, and a detector that detects the swing of the detection rod is provided on the fixed mounting body.

[0007]

When the work is rolled up above a predetermined position when it is rolled, the head of the work hits a first abutment provided at a position immediately above the work in the course of traveling, and is moved forward. , Whereby the detection body rotates around a second horizontal axis substantially perpendicular to the traveling direction of the workpiece, and the detected rod also swings coaxially,
The swing is detected by the detector, and it is detected that the work is in an abnormal posture floating above a predetermined position.

When the work is formed into an abnormal shape with the head eccentric, the head of the work runs while shaking the head during rolling, and the head of the work is provided on the side of the work. 2
Hitting the abutting portion and pushing it sideways, whereby the detector together with the movable mount is in a first position substantially parallel to the traveling direction of the workpiece.
The rod to be detected pivots around the horizontal axis and pivots coaxially, and the pivoting is detected by the detector, thereby detecting that the workpiece has an abnormal shape in which the head is eccentric.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 1 denotes a fixed die fitted to a fixed frame of a rolling machine, and reference numeral 2 denotes a movable die which is fitted to a ram and reciprocates in the direction of arrow A at the front surface thereof. When the work a, which is a forged bolt material, is supplied between the two dies 1 and 2 by a feeder or the like (not shown), the movement of the movable die 2 causes the shaft of the work a to move between the forming dies of the two dies 1 and 2. Rolling and running in the direction of arrow B while being pinched, the screw is cut in the shaft portion of the work a.

Next, a description will be given of an apparatus for detecting an abnormality of a rolled work. A fixed attachment 4 whose tip projects above the traveling path of the work a is attached to the attachment frame 3 provided on the body frame of the rolling machine.
A movable mounting body 5 is rotatably mounted on a first horizontal axis 6 parallel to the traveling direction of the workpiece a.

On the side surface of the movable mounting member 5, the upper end of the hanging detector 8 has a second horizontal shaft 9 perpendicular to the traveling direction of the workpiece a.
It is attached so as to be rotatable around.

At the lower end of the detector 8, a work a of a normal shape is provided.
Is rolled in a normal posture, a first abutment plate 11 reaching a position immediately above the head b of the work a is attached, and a work piece is also provided on a side surface of the first abutment plate 11. A second abutment plate 12 adjacent to the side of the head b when a is normally rolled is attached.

The movable mounting member 5 and the detecting member 8 are always kept in a fixed posture by frictional engagement between the fixed mounting member 4 or the mounting surface of the movable mounting member 5 to which they are mounted. The first and second abutment plates 11 and 12 take the above-mentioned fixed positions for detection. Note that a combination of a rotation urging spring and a stopper may be used to more reliably maintain the mounting posture of the movable mounting body 5 and the detecting body 8.

A detection rod 14 is attached to the upper surface of the detection body 8 and extends from the rising end to the mounting frame 3 with its distal end bent. The extension end 14a of the detection rod 14 is attached to the detection rod 8. Is located just below O corresponding to the contact of the extension end 14a.
Detector 16 consisting of a proximity switch that outputs an N-OFF signal
Are provided by a bracket 17 erected on the mounting frame 3.

Next, the operation of this embodiment will be described. When the work a having the normal shape is in the normal posture, the head b of the work a does not hit any of the first and second abutting plates 11 and 12 as shown by the solid line in FIG. , Rolling is performed by passing through the lower surface and the side.

If the work a rises above a predetermined position during rolling, as shown by a chain line in FIG. 2, the head b of the work a is provided at a position directly above the work a during the traveling. One hitting plate 11 is pressed forward, whereby the detecting body 8 rotates around the second horizontal shaft 9 in the counterclockwise direction in FIG. The work a is in an abnormal posture in which the work a rises above a predetermined position due to the swinging, the extension end 14a being separated from the detector 16 to the side and the detection signal of the detector 16 being turned off. Is detected.

If the forged work a has an abnormal shape in which the head b is eccentric, the head b of the work a runs while shaking its head during rolling, and as shown by the chain line in FIG. The head b of the work a hits the second abutment plate 12 provided on the side thereof and pushes it to the side, whereby the detector 8 moves together with the movable mount 5 around the first horizontal axis 6. The detected rod 14 also pivots around the same axis 6 in the counterclockwise direction in FIG. 3, and the extended end 14a is separated upward from the detector 16 to turn off the detection signal. Thus, it is detected that the workpiece a has an abnormal shape in which the head b is eccentric.

By issuing a warning signal or the like upon detection of the above-described abnormality, it is possible to promptly take a countermeasure.

[0019]

As described above, according to the apparatus of the present invention, a workpiece takes an abnormal posture rising above a predetermined position during rolling or is formed into an abnormal shape in which the head is eccentric. In the case of the occurrence, it can be promptly detected during the rolling, and by taking a countermeasure, it is possible to reliably prevent the occurrence of a large number of defective products caused by the above.

Since the abnormality can be detected in the middle of the rolling process, it is not necessary to provide a separate inspection process as in the prior art, and the production line can be simplified.

Moreover, since the structure is such that the abnormal posture and the abnormal shape of the work can be detected at one place, there is an effect that the apparatus itself can be compactly assembled.

[Brief description of the drawings]

FIG. 1 is a perspective view of one embodiment of the present invention.

FIG. 2 is an explanatory diagram in a case where a floating of a work is detected.

FIG. 3 is an explanatory diagram in a case where eccentricity of a head of a work is detected.

[Explanation of symbols]

a: Work b: Head 1: Fixed die 2: Movable die 4: Fixed mount 5: Movable mount 6: First horizontal axis 8: Detector 9: Second horizontal axis 11: First abutment plate 12: Second butting plate 1
4: Detected rod 16: Detector

Claims (1)

(57) [Claims] 1. A work is supplied between a pair of fixed dies and a movable die having a forming die formed on a corresponding surface, and the work is pressed between the forming dies of the two dies by reciprocating motion of the movable die. The flat rolling machine that rolls by rolling and rolling,
A fixed mounting body is protruded above the work traveling path, and a movable mounting body is attached to the fixed mounting body in a first direction substantially parallel to the traveling direction of the work.
Attached so as to be rotatable around the horizontal axis,
The first, located at a certain position just above the head of the traveling workpiece
A detector provided at the lower end with an abutting portion and a second abutting portion located at a fixed position on the side of the traveling direction of the head of the workpiece is provided on a second horizontal axis substantially perpendicular to the traveling direction of the workpiece. The fixed mounting body is mounted so as to be rotatable around the detection body, and a detection rod swinging in two directions around the first and second horizontal axes is integrally provided with the detection body. A rolled work abnormality detection device, further comprising a detector for detecting the swing of the detected rod.