JPS592591B2 - Weld bead cutting device for flash butt welding machine for steel strips - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a weld bead cutting device for a flash butt welding machine for steel strips.

Immediately after flash butt welding for connecting steel strips, the weld bead is recently cut in a hot state by making an integral movement with respect to one electrode of the flash butt welding machine (usually the electrode on the fixed table side). A device in which a weld bead cutting device is placed on a guide rail arranged in this way and is made to run has come to be used.

FIG. 1 is an explanatory diagram of an example thereof, and in the figure, 1, 1 is a steel strip, 2 is a weld bead, 3 is an upper electrode on the fixed table side, 4 is a lower electrode on the same side, and 5 is an upper electrode on the movable table side. , 6 is the lower electrode, 1 is a hydraulic cylinder for clamping, 8, 8' are upper and lower guide rails, 9, 9' are upper and lower running bodies, 10, 10' are upper and lower part holders, 11, 11' is an upper and lower bead cutting tool. However, the problem with the device shown in FIG. 1 is that when there is a large difference in thickness between the leading steel strip 1 and the trailing steel strip 1', as shown in the side view in FIG. If the steel strip 1' on the opposite electrodes 5 and 6 is thicker than the steel strip 1 on the opposite electrodes 5 and 6 (the side of the fixing bases 3 and 4 in the figure), the height of the cutting surface of the cutting tool will be the smaller thickness of the steel strip 1.
Since it is adjusted according to the thickness of the steel strip 1', the steel strip 1' on the thicker side will be cut too much, and problems such as tool breakage will occur.

Therefore, in such a case, the bead cutting tools 11, 11' are cut using the tool holders 10, 10' so that the height of the cutting surface of the tools 11, 11' matches the height of the steel strip 1' on the thicker side.
The installation height of P must be corrected. Bits 11, 11' originally in bit holders 10, 10'
Although the height adjustment is possible because the installation depends on the screw fastening method, it requires a worker to get close to the device and manually adjust it, which takes 3 to 4 minutes per installation. I need it.

Although there are differences in the thickness of the steel strip, connection welding occurs constantly, so this adjustment work occurs frequently. Therefore, there are problems such as the necessity of permanently disposing personnel for this adjustment work. The present invention aims to advantageously solve this problem, and includes a traveling body mounted on a guide rail arranged to move as a unit with respect to each of the upper electrode and the lower electrode; It consists of a cutting tool holder fixed to the body, and the cutting tool holder has a function that allows the height of the cutting surface of the tool to be adjusted in multiple stages by remote control, and a function that allows the height of the cutting surface of the tool to be adjusted manually or automatically. This is a weld bead cutting device for a flash butt welder for steel strips, which is characterized by having a function that allows for continuous fine adjustment. It incorporates a device that has a function of adjusting the height of the cutting surface of the cutting tool in multiple stages by remote control, and a function of finely adjusting the height of the cutting surface of the cutting tool steplessly by manual or automatic operation.

According to the device of the present invention, when performing differential thickness welding that requires adjustment of the cutting surface height of the cutting tool, a certain level of adjustment height corresponding to the thickness difference is selected, and the operator can perform cutting by remote control. Adjustments can be made instantaneously without getting close to the device. However, since there is a slight margin for the cutting depth of the cutting tool, the amount of adjustment does not necessarily require stepless thickness adjustment to match the thickness of the steel plate V on the thicker side. This will now be explained with reference to a concrete example.

FIG. 3 is an overall view of the apparatus of the present invention seen from the side in a direction perpendicular to the steel strip weld line. Since the upper and lower parts have the same mechanism, we will explain only one side of the upper part.

A traveling body 9 is placed on a guide rail 8 parallel to the tangent line of the steel strip 1 via a traveling bearing 9, and this traveling body 9 is moved by a traveling body driving actuator 12 to 1 from one end in the width direction to the other end (leftward in the figure). At this time, the bead cutting tool 11 cuts the weld bead 2. When the cutting is completed, the clamp cylinder 7 shown in FIG. 1 rises to release the electrode clamp on the upper electrode 3, so the guide rail 8 also rises and the cutting tool 11 is separated from the surface of the steel strip 1. In this state, the traveling body driving actuator 12 returns the traveling body 9 in the opposite direction (from left to right) to return it to its original position. The cutting tool 11 is attached to the tool holder 10, and the tool holder 10 is connected to the traveling body 9.
installed on.

The tool cutting surface height manual adjustment device 15 is used to finely adjust the height of the cutting surface so that it correctly matches the cutting surface of the steel strip 1 when replacing a worn-out cutting tool 11 with a new one. As shown in FIG. 4, adjust the protruding length of the bead cutting tool 11 by loosening the holding bolt 16 and then screwing in and out the male head screw 18 screwed into the female thread 17. This is how it was done. The cutting surface height remote adjustment device 13 is for manually changing the height of the bead cutting tool 11 during differential thickness welding based on commands from the power and signal supply device 14 for operating the remote adjustment device. It is shown in the figure.

The motor 19 is rotated by the power for operating the remote control device and a signal from the signal supply device 14, and the motor 19 is rotated by a signal from the signal supply device 14.
Detects the amount of rotation and provides feedback.

The rotation of the motor 19 causes the screw shaft 21 to rotate,
Move the screw nut 22 laterally.

The link 26 performs a toggle motion around the first rotating shaft 24 fixed to the traveling body 9 according to the amount of lateral movement, and this causes the tool holder 10 to move around the second rotating shaft 25 fixed to the traveling body 9. The height of the cutting surface of the cutting tool 11 is adjusted by small rotation around the center. The adjustment dimensions in Example 2 are illustrated in the following table.

The mechanism illustrated above is just one example, and a hydraulic actuator is used instead of an electric motor, a wedge mechanism is used instead of a link mechanism, and the tool holder 10 is attached to the second rotating shaft 25. Many other mechanisms are conceivable, such as raising and lowering the bead cutting tool directly relative to the traveling body 9 instead of rotating it around, or making it possible to automatically and remotely control the manual fine adjustment mechanism 15 of the bead cutting tool 11. There is no problem at all as long as the mechanism satisfies the purpose explained in the content of the invention.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a conventionally known weld bead cutting device seen from the side, Fig. 2 is an explanatory diagram showing the situation when there is a large difference in the thickness of the preceding and following steel strips, and Fig. 3 is the welding line of the steel strips. FIG. 4 is an enlarged explanatory view of the l portion of FIG. 3. 1... Leading steel strip, 1''... Trailing steel strip,
2...Flash butt weld bead, 3...
...Upper electrode on the fixed base side, 4...Lower electrode on the fixed base side, 5...Upper electrode on the movable base side, 6...Lower electrode on the movable base side, 7. ...Hydraulic cylinder for clamp, 8, 8'... Upper and lower guide rail, 9,
9'... Upper and lower running body, 109101.
...Upper and lower tool holder, 11,1V...
... Upper and lower bead cutting tool, 12...
... Actuator for driving the traveling body 1, 13, 13'...
... Upper and lower tool cutting height remote adjustment device, 1
4, 14'... Power and signal supply device for operating upper and lower remote control devices, 15, 15'... Manual cutting height adjustment device for upper and lower cutting tools.

Claims (1)

[Claims] 1 Consisting of a traveling body placed on a guide rail arranged so as to move as one body with respect to each of the upper electrode and the lower electrode, and a cutting tool holder fixed to the traveling body,
In addition, the cutting tool holder has a function that allows the height of the cutting surface of the cutting tool to be adjusted in multiple stages by remote control, and a function that allows the height of the cutting surface of the cutting tool to be finely adjusted steplessly by manual or automatic operation. A weld bead cutting device for flash butt welding machines for steel strips.