JPS60180689A - Clamping device of steel strip for butt welding - Google Patents

Abstract

PURPOSE:To enable joining by welding with high accuracy by providing a supporting member which supports a moving side clamp and moves and a stopper mechanism which controls the movement thereof and turning the supporting member at the forward limit of the movement. CONSTITUTION:The ends of the preceding and succeeding steel strips clamped by inlet and outlet side clamps 3a, 3b are sheared by a shearing machine 2. When the inlet side clamp 3a is advanced by the operation of a cylinder 16, the clamp 3a moves first in parallel with the line. When the clamp 3a comes to the forward end of butting, a guide wheel on the side near the outlet side clamp 3b engages with the notch 34a of a wall 34. The clamp 3a stops after swiveling in the direction where the gap at the other end is made to zero. The butt parts are brought into tight contact with each other by such method by which the welding with high accuracy is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a steel strip clamping device for butt welding, and is particularly suitable for butt laser welding in which butt precision is strictly required. We propose a steel strip clamping device suitable for clamping steel strips.

Generally, in annealing process lines in the steel industry,
Leading and trailing steel strips are connected at the input side of the line and sent out to predetermined processing steps. General-purpose automatic welding machines used for this purpose include seam welding machines, flash butt welding machines, and T-work G-WIG welding machines, but in recent years laser welding has become popular due to its low heat input and high-speed welding capabilities. It has been attracting attention.

However, in a laser bath welding machine, the focal diameter of the focused laser beam is very small, so when butt welding steel plates together, a fairly high precision welding line is required.

However, in a general steel process, for example, when butt welding leading and trailing steel strips, the leading and trailing copper strips are cut with a double cut shear, etc., and the cut surfaces are butted and welded. There is. That is, one side of the copper strip cut with a double cut shear as shown in Figure 3 is moved to the other side to form a welding joint surface, but if it is cut in accordance with the conventional method, it will be cut as shown in Figure 8 (4). , as shown in (1) of (B),
The cutting line where the mating surfaces are in the board width direction is not a clean straight line, and there is a large gap G between the operating side and the driving side of the line.
small values (Gmax, Gm1n, ) occur. This gap G is for a board with a thickness of 1.0 to 3.0 mm, and although it varies depending on various cutting conditions, it is approximately 0.1 #lIm, and especially in shears equipped with blades with rake angles, it is difficult to finish cutting I. 111j tends to become narrower.

For this reason, if one of the metals to be bathed (steel strip) is simply moved in parallel to form a walf;j, the gap difference remains as is as shown in Figure 8-(3), and laser welding is performed. In some cases, it is unsuitable, especially if filler wire is not used, making welding virtually impossible.

In view of such circumstances, the present invention provides a lamp device in which the end faces of the butted steel strips come into close contact with each other over the entire width of the steel strips, making it well suited for laser welding. It is an object of the present invention to provide, and to accomplish that object, a clamping device as set forth in the claims set forth in the preamble of this specification. The details of the configuration of the present invention will be explained below based on the drawings.

First, the specific configuration of the present invention shown in the illustrated example will be summarized and explained. In a clamping device consisting of a pair of clamps, at least one of which is held movably in the line direction, the movable side clamp't is supported via a gate-shaped sliding saddle (support member) on the base plate of the machine base. A pair of stopper mechanisms are provided at two locations on the supporting member t-, the line operating side and the driving side where the pace plate is attached, respectively, in order to restrict the saddle and cherry blossom movement limits, as well as a pair of stopper mechanisms that engage with the lower surface of the saddle. A notch is connected to a pair of cylinders provided to reciprocate in the line direction, and one end of the abutting side faces inward on both walls of the operation side and drive side along the line of the core base grate. A support member guiding device is provided which forms a guide wall with a section, and a guide wheel attached to the portal leg of the support member saddle is brought into contact with the guide wall of the guide device, so that the saddle is a moving precursor. The feature is that it can be turned to either side within the horizontal plane.

Specifically, the support member (sliding saddle) that supports the movable side clamp is in an unrestrained state when moved for butting, and is supported so that one side is a fulcrum and the other side turns in a horizontal plane. It is configured to achieve a tight joint, and the stopper that restricts the forward movement of the movable clamp can be set at different positions on the operation side and the drive side, and the gap G after butting can be adjusted as appropriate. It is composed of

- The present invention will be explained below using an example of a clamp device used when butt welding the tail end of a leading copper strip and the tip of a trailing copper strip using a laser welding machine.

In Figures 1 to 3, ■ is a laser oscillator installed offline, 2 is a shearing machine placed offline, 8a
, ab are clamp devices, and a laser source emitted from a Z0 oscillator 1 is focused on a laser torch 4 that can move in the width direction of the copper strip, and irradiates the joint surface of the copper strip to perform welding.

The clamping device includes an exit clamp 8b that clamps the tail of the leading copper strip, and an entry clamp 8a that clamps the tip of the trailing copper strip. An example of movement toward the side clamp 8b will be explained.

Each clamp device is supported on a machine base 1, and the entry side clamp 8a on the movable side is supported via a sliding saddle 17 on a base plate 11a on the machine base. This sliding saddle 174'1. It reciprocates along the line direction toward the outlet clamp 18b via the cylinder 16, and slides between the saddle 17 and the lower fixed clamp 15a and the upper lifting clamp 12a. , and a cylinder 14af for raising and lowering supported by the upper frame la& (on which an entry side clamp 18a is placed; reference numeral 13k in the drawing), 13b
.

Reference numerals 14b and 15b show fixed-side exit clamps 8b that are disposed opposite to each other.

The clamping method is a pair of upper and lower clamps 12a.

Upper clamp 12a for steel strip S passing between 15a
The entire lifting cylinder 14a is lowered and clamped.

Next, a mechanism for moving the steel @S clamped as described above toward the other outlet clamp device 3bfIII, that is, a support member guide device will be described. The movement is performed via cylinders 16 and 16' installed separately on the operating side and drive side of the line 1 on the base play) 11a, and the free end of the rod that retracts from the cylinder 16.16' is The base plate lla is locked to the lower surface of a sliding saddle 17 that is arranged to straddle the base plate lla,
By operating this cylinder )...-18,16"k, the sliding saddle 17 and the entry clamp itself placed on it are moved forward and backward, and the steel strips are butted tightly to form a weld line. Get a face.

Next, the device S for regulating the movement width (advance limit of movement) of the entry side clamp 8a will be described with reference to Fig. 4.5.

The sliding saddle 17 has an arm 1 equipped with a hook at the rear.
7a is protruding, and the advancement of the saddle 17a is based on the base play).The following stopper machine 4 is placed on 11a.
6” regulated by N.

This stopper mechanism is composed of a stopper 18, a screw shaft 27 that directly meshes with the stopper, and a motor 82 that is connected via a shaft 81 and gears 28, 29, 80 provided on an extension thereof. 32 is driven by the detected pressure of a pressure detector 25 such as a load cell that is in contact with the hook of the saddle arm 17a attached to the rear end of the screw shaft 27, and is located on the operating side and the driving side of the line, respectively. The stopper 18.18' is configured so that different positions can be set. Therefore, the saddle, that is, the entry side clamp 3a whose advancement width is regulated by the stoppers 18 and 18' can change the position of the advancement limit depending on the width direction of the copper strip.

Next, the rotating mechanism of the sliding saddle 17, that is, the entry side clamp 3a, will be explained based on FIGS. 5 to 7. The saddle] 7 is the base play)] 1a on the cylinder 16, 1
In order to make the movement smooth, guide walls 84° 34' are provided on both sides of the base plate 11a, and the guide walls 84 and 84 are moved by the operation of the base plate 11a.
', a plurality of guide wheels 85 attached to the portal leg 17b of the saddle are brought into rolling contact. Therefore, the saddle, that is, the clamp 3a, which is arranged to straddle the pace grate, reciprocates in the line direction via the guide walls a 4 and 34' guide wheel 85.

By the way, the saddle 17 moves forward in a parallel state until its arm 17a touches either one of the stoppers 18, 18', but then the saddle 17 moves forward along the line until it touches the other stopper. Since the saddle 17 is operated to push forward, the first saddle 17 is tilted and substantially rotates. In order to assist the pivoting movement of the saddle 17, cutouts a4a' are provided at the ends of the guide walls 84 and 34' on the abutting sides so as to face inward toward each other, and the guide wheel 35 is inserted into the cutouts 8a.
4a, the saddle 17 reliably pivots to completely correct the uneven gap occurring in the width direction of the copper strip and form a closely abutted bath tangent line as shown in FIG. 8(1). make.

In addition, in the above description, the stopper 18. ! I gave an example where the motor that drives 8' is common, but this is on the operating side,
It may be separate from the small fihOIII. Further, although the movable clamp is limited to the entry side, it may be provided on the other side (output side) or both.

Next, the operation of the device of the present invention will be explained based on FIG.

・First, the example in Figure 8) (example without filler wire): The leading copper strip and the trailing steel strip are fed to a predetermined position and stopped.
When it stops, cylinder 1 of input/output side clamps aa and ab
Activate 4a and 14bi to clamp the leading and trailing copper bands. Next, the shearing machine is advanced into the 2fc line to cut the ends of the light and trailing copper bands. After cutting, the shearing machine 2 moves back to a predetermined position. Next, the cylinder 16 is actuated to move the entry side clamp 8a forward. At this time, the stopper 18 is set slightly wider than the distance between the end faces of the copper strips cut by the shearing machine (referred to as the cutting interval). In this way, the entry side clamp 3
Initially, a moves parallel to the line, and the entrance side clamp 8
When point a comes to the forward end of the butt, the guide wheel on the side closer to the outlet clamp 8b engages with the notch 34a of the guide wall 34. In this state, the entry side clamp 8a must be unrestrained in the horizontal plane and can move further if the cylinder 16 is operated.

That is, as shown in (2) and (8) of FIG. 8, when one end of the copper strip in the width direction comes into contact with each other, the entry side clamp 3a turns and stops in the direction that makes the gap g at the other end zero.

As a result, the gap at the time of butting can be made smaller than when the entry side clamp 8a is moved straight forward in a direction parallel to the line.

At this time, the trailing copper strip becomes oblique to the line due to the rotation of the entry clamp, but the value is 0°"/1000.
There is no problem if it is around 1111+1.

・Example of Figure 8 (A) (4/ when using filler wire)
In this example, the position of the stopper 18 is set smaller than the cutting interval, and the saddle, that is, the entry clamp 8a moves forward in a direction parallel to the line, and the guide wheel 35 near the exit clamp side 8b moves forward as a guide. Notch 84a in wall 84
, and the entry side clamp 3a becomes unrestricted in the horizontal plane. When the cylinder 16 is further actuated, the arm 17a of the saddle that supports the entry side clamp comes into contact with the stopper 18, resulting in the state shown in Fig. 8 (3), where it stops with a slight gap g' between the cut end faces. 5. Next, when the butt is completed, a filler wire is supplied and the laser torch 4 is moved in the width direction of the steel strip to perform welding to fill the gap g'.

As explained above, according to the clamping device of the present invention, it is possible to bring the abutting portions that form the welding line in laser welding or the like into close contact and to perform highly accurate welding.

In the above embodiment, a guide wheel is provided on the sliding saddle and a notch is provided on the base plate on the fixed side, but conversely, a guide wheel is provided on the base plate side with a notch on the sliding saddle side. You can. Furthermore, the sliding side and fixed 1
111 It may be reversed, and there are four modes including the above embodiments0

[Brief explanation of drawings]

Figure 1 is a plan view of the laser welding machine for copper strips, Figures 2 and 3 are a front view (Figure 2) and a side view (Figure 3) of the laser welding machine installed in the line. Figure 4 is a front view of the transfer #JO1ll crank device, No. 5
Figure (A) is a plan view showing the stopper mechanism on the base plate, Figure (B) is a route map showing how the saddle turns, and Figure 6 is a guide wall and guide car showing the saddle movement position. FIG. 7 is an explanatory diagram showing the relationship between the saddle and the cylinder. FIG. 8 is an explanatory diagram showing the relationship between the saddle and the cylinder. FIG. 8 is an explanatory diagram showing the relationship between the saddle and the cylinder. FIG. It is an explanatory diagram. 1... Laser oscillator 2... Shearing machine aa, ab
... Clamp device 4 ... Laser torch 11 ... filla ...
Base plates 12a, 12b...upper clamps 18a, 1
8b... Upper frame 14, a, 14b... Lifting cylinder 15a, i5b... Lower clamp i6
, 1 (J'... Cylinder 17... Saddle (supporting member) 17a... Saddle arm 18... Stopper 25... Pressure detector 26... Guide z7.
...Screw shaft 28, 29, 30...Gear 3
1... Shaft 32... Motor 34... Guide R84a... Guide wall notch 35.
...Guide car. Figure 4 Figure 5 Figure 6 Figure 7 Figure 7 Figure 8 (A) (B,)

Claims (1)

[Scope of Claims] L A pair of copper strips, at least one of which is held movable in the line direction, for tightly joining the tail and tip portions of leading and trailing copper strips to suit butt welding. A crank device comprising: a support member for supporting the movable side clamp; a guide device for guiding the movement of the support portion in the line direction; and a guide device for causing the support member of the movable side clamp to slide on the guide device. It consists of a drive device and a stopper mechanism provided to regulate the limit of movement during movement, a guide wheel is provided on either one of the support member of the movable clamp and the guide device, and among the support member and the guide device, A notch is provided at the end of the guide wall that abuts against the guide wheel that is not provided with the guide wheel, so that the support member of the movable clamp can be rotated in a horizontal plane in the movable precursor. - Copper strips for butt welding, crank devices.