JPS5835372Y2 - Cutting shape measuring device after flush trim - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for measuring the cutting shape of a welded part after flush trimming in a steel strip welding operation.

Butt welding of steel strips is commonly used, and immediately after welding, the cross-sectional shape of the welded part has flashes 1 at the top and bottom, as shown in FIG.

Since this flash 1 causes scratches in the rolling rolls or local shape defects in the steel strip 2 in the post-welding process, the flash trimmer is used to cut off the flash portion.

A conventionally commonly used flash trimmer is provided as an independent device near a welding machine.

However, if the welding machine and flash trimmer are installed independently and in separate locations, it is necessary to align the welding position of the steel strip with the reference position of each device, which is troublesome and time-consuming. Welding machines have appeared in which a flash trimmer is provided in the same device and the flash is cut by the flash trimmer while the steel strip is clamped with an electrode without moving the welding position.

J-However, a welding machine that used to perform welding and flush trimming at the same time as this, with the steel strip clamped, was not able to perform flush trimming when the gap between the entry frame and the exit frame, which had a clamping mechanism, was narrow. Because of trimming, it is unclear at the time of cutting whether or not the flash has been properly cut.

The cutting shape of the flash is as shown in Figure 2 A, 2B and 8, where (A) shows a good cutting shape and (B) shows insufficient cutting (-
+-Jl), ←→ is excessive cutting (-, il).

With the above-mentioned welding machine, the cutting shape of such a flash is narrow between the entry frame and the exit frame, and when cutting the flash with a flash trimmer, it is difficult to know how the flash is being cut. For inspection, the welding position of the steel strip is moved outside the welding machine, the copper strip is stopped, and the judgment is made visually.

The present invention provides an extremely advantageous device for trimming the flash and simultaneously measuring the cut shape of the flash. In a welding machine that performs flash trimming by moving along This is a cutting shape measuring device after flash trim, in which one box with a built-in camera is fixed to the flash trimmer, and the other is provided so as to extend outside the welding machine line, and is movable as the flash trimmer moves.

In other words, the present invention is a device in which a box containing a laser oscillator, a concave mirror, a plane mirror, a television camera, and other cutting shape measurement instruments is fixed to a flash trimmer, and the flash trimmer is moved and the flash cut shape is measured immediately after the flash is cut. .

Next, the measurement principle of the cutting shape measuring device according to the present invention will be explained in the third section.
This will be explained using figures.

A laser oscillator 4 oscillates a laser, and a beam expander lens 5 generates a slit-shaped laser beam 6, which is projected onto a flash-trimmed welded joint 3 as an object to be measured.

At this time, if the weld joint 3 has been cut as shown in Figure 2 A, the projected slit-shaped laser beam 6 will be projected in the same shape, but if there is excess or deficiency in cutting as shown in Figure 2 A, welding will occur. Unevenness remains in the joint 3, and the laser beam 6 on the steel strip 2 does not form a straight line, but becomes a light beam with unevenness.

This light beam is photographed by a television camera 7, and a monitor television 8
The signal processing circuit 9 and the pass/fail judgment circuit 10 digitize the cutting excess/deficiency amount (+ll, -Jl) and judge whether it is within the allowable 41 range. If it is outside the allowable 41 range, an alarm 11 issues an alarm. It is intended to produce the following.

Next, the cutting shape measuring device after flash trim according to the present invention will be explained in detail with reference to FIGS. 4 and 5.

After the steel strip 2 is butt welded, the inlet frame 12 and the outlet frame 1 are assembled in the same state as before when the steel strip 2 was clamped.
A flash trimmer 15 that is moved by a cylinder 14 in the width direction between the three is provided on the front and back of the copper strip 20.

The flash trimmer 15 is provided with a shearing blade 16 for cutting off the flash 1 generated during butt welding.

A reason 17 is provided for one rule of this flash trimmer 15.

The base 17 has a frame (not shown) capable of withstanding considerable weight on the -17 side, and a space 18 on the other side of the base 17.
It is set up so that it has.

Moreover, as is clear from the plan view of FIG. 5, the space between the entrance frame 12 and the exit frame 13 is very narrow, and the space 17 leading to the outside of the welding machine is a wide space. There is.

The various devices of the present invention are built in 17 for this purpose, and the main body of the laser oscillator 4 and television camera 7 is -1.
It is fixed with bolts etc. within the wide space of 7.

That is, laser oscillator 4'J? The slit-shaped laser beam 6 projected by the beam expander lens 5 is -17 on the extension of the slit-shaped laser beam 6.
A concave mirror 20 provided on a side wall 19 projects the light onto the steel strip 2 with the beam width further narrowed.

The shape of the laser beam projected onto the steel strip 2 is reflected on a plane mirror 21 provided directly above.

The shape of the laser beam on the plane mirror 21 is photographed by the television camera 7, which is connected to the objective lens 23 via the television camera 70 body and the glass fiber 22, as shown in the figure.

These various cutting shape measuring instruments are fixed in one unit 17, which is integrally connected to the flash trimmer 15 and moves in the width direction as the flash trimmer 15 moves.

The main bodies of the laser oscillator 4 and the television camera 7 are arranged so that they extend outside the line even after all measurements in the central direction are completed, and the parts that go inside the line (between the entrance frame and the exit frame) are concave mirrors. 20, only a plane mirror 2L objective lens 23 and a glass fiber 22 are used, so the required volume is very small, and a flash trimmer 15 is installed in the welding machine.
This is a flash cutting shape measurement device suitable for welding machines with built-in.

The accuracy of this device is determined by the projection angle of the concave mirror, the reception angle of the plane mirror, the magnification of the monitor TV system including the objective lens, and the number of monitor TVs running. If the monitor TV system is used at a magnification of 10 times, the amount of excess or deficiency (+J l') of the flash trim of the object to be measured is
It is possible to measure the amount magnified 40 times, making it possible to create highly accurate measurements.

4 and 5 show a monitor television 8 and a signal processing circuit 9.
, a pass/fail determination circuit 10, and an alarm 11 are not shown, but are installed outside the welding machine line near the welding machine operation panel.

As described above, the flash cutting shape measuring device according to the present invention is extremely capable of measuring the flash cutting shape at the same time as flash trimming in a welding machine that performs welding of steel strips and flash trimming at the same position. It is advantageous.

[Brief explanation of drawings]

Figure 1 is an explanatory cross-sectional diagram of the welded part after butt welding of steel strips, Figure 2
Figures A5 and C are cross-sectional explanatory diagrams of the welded part after flash trimming, Figure 3 is a diagram of the principle of measuring the cutting shape of the welded part after flash trimming, and Figure 4 is a cross-sectional explanatory diagram of the cutting shape measuring device of the present invention. , and FIG. 5 are explanatory views of the same plane. In the drawing, 15 is a flash trimmer, 2 is a material to be welded, and 4 is a flash trimmer.
is a laser oscillator, 20 is a concave mirror, 21 is a plane boundary, 7 is a television camera, and 17 is a pipe.

Claims (1)

[Scope of utility model registration request] In a cutting shape measuring device for a device that welds a steel strip with a welding machine and moves a flash trimmer along the welding surface at the same position to perform flash IJ minking, a laser oscillator that emits a laser and a laser oscillator that reflects the laser to reflect the welded part are used. It has a built-in concave mirror that emits light, a plane mirror that reflects the welded area illuminated by the laser, and a television camera that captures the image of the plane mirror.The - side is fixed to the flash trimmer, and the other side is protruded outside the welding machine line. 1. A cutting shape measuring device after flash trim, characterized in that it is provided as shown in FIG.