JPS5997808A - Shearing method of metal strip welded end and its device - Google Patents

Abstract

PURPOSE:To make a device small-sized and improve the cutting precision by connecting the upper end and lower end of a C-type frame with an arm holder at a shearing position. CONSTITUTION:A near-L-type bent section 16 is formed at the tip of both arms A, B. This bent section 16 enters into a near-U-type groove 17 formed inside a holder 15 from the vertical direction of the paper surface when a C-type frame 5 has reached its shearing position so that the arms A, B are coupled with the arm holder 15. The arm holder 15 is supported symmetrically up and down by a holder support member 19 provided on the line side. Accordingly, the overall device is made small-sized and a large gate-type frame is made unnecessary.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is mainly used for continuous processing of 11 lengths of metal strip material, such as pickling lines and annealing lines in steel plants, by butting and welding the preceding strip material and the subsequent strip material. The present invention relates to a method for shearing the advantageous end of a strip prior to welding and a shearing device therefor in order to ensure the precision of butt-matching of both strip materials.

Conventionally, when connecting both leading and trailing metal strips by TIG welding or laser welding, for example, the first
As shown in the figure, both leading and trailing strips are continuously fed onto the line by an entry side moving clamp device (2) and an exit side fixed clamp device (3) installed in the welding machine (1). After each end of the material is clamped, the shearing device (4) is advanced from the line side into the clamped end of the strip material, and the upper and upper cutting blades (7) are inserted.
(8), and then by advancing one movable clamping device (2), the two strip phase cut surfaces are butted against each other, and the welding torch (27) is placed on the welding line formed by the butt. ) during welding.

For the above-mentioned welding bars, either a guillotine shear type or a rotary shear type shearing device has been put into practical use. These shearing devices (4) are used to move the cutting blades (7) and (8) from the line side to the shearing position of the IJ tube edge.
A moving platform (5) commonly called a C-shaped frame is attached to a rail (9).
) is usually guided by rollers (11...) etc. and moved forward and backward by cylinders (12) etc. from the direction across the line.

This type of moving table, or C-shaped frame (5), is literally open on one side, so it needs to be rigid enough to withstand the enormous force during cutting, and in reality, the upper open end (5C) of the C-shaped frame A gate-shaped frame (6) and a support roller (al
), (62), etc., to receive the reaction force generated during cutting.

However, with such conventional methods and structures, although only the reaction force generated during cutting can be avoided, a huge shearing force is directly applied to the guide devices such as rollers and rails used to move the shearing device. The solution was to make the Ikioi guide device large and expensive due to the need for a strong structural design for the guide device, and even then, variations in cutting accuracy due to the guide device's drag that occurs during cutting cannot be avoided. There remained major problems to be solved.

The present invention solves the above-mentioned drawbacks, and when welding the terminal end of a metal strip material and the leading end of a subsequent strip, the two-part leading end and the lower leading end of the C-shaped frame are , and are connected by arm holders at the shearing position, so that the cutting force is absorbed within the C-shaped frame so that it is not applied to other guide devices, making the guide device small and reducing the size of the guide device. This eliminates the need for a gate-shaped frame and contributes to improving cutting accuracy.

Embodiments of the present invention will be described below based on the drawings. The shearing device (4) for carrying out the method according to the invention includes:
As shown in the example in Fig. 3, a C-shaped frame (5) used for transportation has cutting blades (7) and (8) at the top and bottom, and one of the upper blades (7) is connected to the frame (5). 5) is moved up and down by a cylinder (13) fixed to part 11, and the other lower blade (8) is moved up and down by a cylinder (14) fixed to the lower part of the frame (5). The C-shaped frame (5) + 1 is guided by rollers (11...) on the inner rail (9), and the cylinder (
12) etc.

Although the main structure as described above is the same as the conventional shearing device (4) shown in FIG.
) are provided with arms A and B facing each other at the upper end (5a) and lower end (5b) of the arm holder (■ 5) by engaging with "-
The upper and lower ends of the frame are connected to each other so that the shearing force is absorbed within the movable frame.

FIG. 4 shows an example of a method for connecting the tip (5a) and the lower tip of the C-shaped frame, and the figure shows an example of a method for connecting the tip (5a) of the C-shaped frame and the bottom tip of the arm A.
This is an example specifically showing the state of connection between B and the arm holder (15). Both arms A.

At the tip of B, a substantially rectangular folded portion (1) is formed.

When the C-shaped frame reaches the shearing position, the bent portion (16) enters a substantially U-shaped groove (17) formed inside the holder (15) from a direction perpendicular to the plane of the paper;
Automatically attach the above arms A, B and arm holder (15)
The structure is such that the two are combined. This arm holder (1
5) and the C-shaped frame (5) are provided symmetrically with respect to the line center line, and this arm holder (15) is supported symmetrically upward and downward by a boulder support member (19) provided on the line side. There is. And this holder (15)
An adjustment means (1) is provided at an intermediate position of the U-shaped folded portion (16) so that the height can be easily adjusted according to the height of the U-shaped folded portion (16). As in the example above, the main body case (20) is fixed in position to the holder support member (19), and the four parts (
21) is inserted with a pin (24) that dispenses the liquid by the force of a coil spring or disc spring (22). And this pin (24) and arm holder (
The insertion piece (25) interposed between the arm holder (1) and the arm holder (1) can be inserted and removed by arbitrarily turning an adjustment screw (26) attached to the outside of the arm holder (1). Attach the arm holder (1) with the setting screw (26).
5) can be adjusted to a height that allows the bending portion (16) to fit comfortably with the bending portion (16).

Next, the operation of the shearing device according to the present invention will be explained.

The leading strip material and the trailing strip material that are continuously fed on the line are each fixed by a clamping device (3).
and clamping by a moving clamping device (2), causing both strips to protrude slightly from the clamping position. Next, the C-shaped frame (5), which is covered with 100% foil, is moved from the direction across the line by the cylinder (12) to the rail (September), and is moved into a predetermined shearing position. In the shearing position, arms A and B provided at the upper and lower ends of the C-shaped frame are attached to arm holders (15).
to completely connect the upper and lower ends of the C-shaped frame (5). From this state, the upper blade (7),
Both the lower blades (8) operate with cylinders (+sX++), and both strip cutting ends remain in a clamped state.

When shearing is completed, the C-shaped frame (5) is moved back from the shearing position in the direction of returning to its original position, and both arms A and B are detached from the arm holder (15), returning the upper and lower ends of the C-shaped frame to their original positions. Open it up like this. Next, the movable clamping device (2) moves forward and abuts the cut surfaces of both the leading and trailing strip materials over the entire length of the strip +lJ so that the gap is at a predetermined size or zero.

Thereafter, the welding torch (27) is driven from the welding start point on the butt welding line, and welding is started at the same time. In this way, when the welding is completed, both clamping devices (2X3) are opened and the metal strip material is transported,
Both devices are put on standby in preparation for the next operation.

As described above, according to the present invention, when shearing the terminal end of the preceding strip material and the tip end of the succeeding strip material prior to welding, the upper part of the C-shaped frame can be sheared by simply advancing the shearing device to the shearing position of the metal strip material. Since the tip and lower tip are automatically connected at the shearing position, the frame structure can be easily changed from a C-shaped frame to a square frame during shearing, and the shear force generated during shearing can be easily changed. Since it can be effectively absorbed within the rectangular frame mentioned above, all troublesome problems such as the shear force being applied directly to the guide device for movement of the portal frame and the deflection that occurs in the guide device, as in the past, can be avoided. (It can be solved.

Therefore, the guide device used for moving the C-shaped frame only needs to have the necessary conditions for movement, and the structural design necessary to receive shear force is no longer necessary, and the structure of the guide device In addition to greatly simplifying the process and eliminating the need for the conventional portal frame, TIG
It can exhibit many excellent effects, such as improving the shear accuracy required for welding and laser welding, and creating a perfect butt state that leads to improved welding quality.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of a conventional shearing device used in a welding machine for connecting metal strips 47I. Figure 2 shows a C-shaped frame used as a moving platform for a conventional shearing device.
FIG. 7 is a front view showing an example of a state in which the line has entered a shearing position and is engaged with a portal frame. FIG. 3 is a side view showing an example of a case where the shearing device according to the present invention is used in a welding machine for connecting metal strips. Figure 4 shows the upper tip and lower light f:! of the C-shaped frame of the shearing device of the present invention. FIG. 3 is an enlarged front view of main parts showing an example of a case where A and A are connected by an arm holder in a shearing device. FIG. 5 is a sectional view of a main part showing a specific example of the arm holder position adjustment means. [Explanation of symbols] (4)...Shearing device (5)...C-shaped frame (5a)...Two-part tip (5b)...Lower tip (15)...Arm holder A, B...Arm inventor Masahiko Kaneko

Claims (1)

[Scope of Claims] 1. A shearing device is installed in the shearing device at both opposing ends of the leading strip material and the trailing strip material that are continuously fed on the line and the IJ strip material from the direction across the line. When the ends of both strips are sheared prior to welding by advancing the shearing device, the upper and lower ends of the C-shaped frame used for moving the shearing device are connected during the shearing. A method for shearing a welded end of a metal strip, in which the force during cutting is absorbed within the frame. 2. Advance the metal strip material in the direction across the C-shaped frame along the running line of the metal strip material, which is fed in a leading and trailing relationship.
A pair of cutting blades supported by this frame shear the ends of both strips clamped on the line.1) In the device, arms A and B are attached to the upper and lower ends of the frame. Place them facing each other,
A device for shearing the welded ends of metallurgical joints, characterized in that both of these arms are detachable from an arm holder fixed in position on the line side facing the frame.