JPH07132384A - Device for welding with pressure of sheet bar - Google Patents

Abstract

PURPOSE:To realize the smooth biting into a rolling machine by suppressing the vibration in the frictional sliding. CONSTITUTION:The rear end of a preceding sheet bar 32a is clamped by a preceding holding block 4 from the top and the bottom, and the forward end of a succeeding sheet bar 32 is aligned to the rear end of the preceding sheet bar 32 by a succeeding holding block 5 and clamped from the top and the bottom. The preceding holding block 4 and the succeeding holding block 5 are reciprocated with the phase of 180 deg. in the width direction of the sheet bar 32 while the succeeding holding block 5 is brought close to the preceding holding block 4 by pressing a pushing beam 12 with an upset cylinder 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for friction welding of a sheet bar made of a metal material such as steel or a non-metal material.

[0002]

2. Description of the Related Art Conventionally, as a method of joining sheet bars, an electric heating device electrically heats a rear end portion of a preceding sheet bar and a leading end portion of a succeeding sheet bar and presses them with a pressing device to join them. Methods have been used. However, in this case, a large capacity electric heating device was required. For this reason, Japanese Patent Laid-Open No. 5-303 proposes a method in which frictional heat is generated by rubbing the joining surfaces to join them.

[0003]

In the above-mentioned joining method using frictional heat, the trailing end of the preceding sheet bar is clamped by the preceding sheet bar gripping block, and the leading end of the following sheet bar is clamped by the following sheet bar gripping block. While pressing the upset drive mechanism, one of the blocks is reciprocated in the plate thickness direction or the width direction of the seat bar by the reciprocating mechanism. However, this reciprocating motion causes an unbalanced load, which causes vibration in the entire apparatus. In addition, there is a problem that the welded portion that is press-contacted is greatly raised and an impact is given to the rolling mill when the rolling mill is engaged in the subsequent process. This bulge became especially large when the sheet bar reciprocated in the plate thickness direction. For this reason, a method of mechanically removing the large bulge at the joint is also used, but a large-scale cutting device is required, and it is often difficult to secure a place for installing the cutting device, resulting in an increase in cost.

The present invention has been made in view of the above problems, and suppresses the occurrence of vibration during frictional sliding, reduces the protrusions at the joint, and smoothly engages the rolling mill in the subsequent process. It is an object of the present invention to provide a pressure bar joining apparatus for a seat bar that can perform the above.

[0005]

To achieve the above object, a leading gripping block for clamping the trailing end of a leading seat bar from above and below and a leading end of a trailing seat bar are aligned with a trailing end of the leading seat bar. In this state, the trailing gripping block is clamped from above and below, the upsetting mechanism that presses the leading gripping block and the trailing gripping block toward each other in the longitudinal direction of the seat bar, and the leading gripping block and the trailing gripping block. And a reciprocating mechanism that reciprocates in the width direction of the seat bar so that the phases thereof are opposite to each other.

Further, a leading gripping block for clamping the trailing end of the leading sheet bar from above and below and a trailing gripping block for clamping the trailing end of the trailing sheet bar from above and below with the leading end of the leading sheet bar aligned. An upset mechanism that presses the block, the leading gripping block, and the trailing gripping block toward each other in the longitudinal direction of the seat bar, and moves the leading gripping block, the trailing gripping block, and the upsetting mechanism in the longitudinal direction of the seat bar. And a recessed portion is provided along the width direction of the seat bar at a position facing the upper and lower clamp surfaces of the preceding gripping block or the trailing gripping block, and the moving mechanism travels at the same speed as the seat bar. The middle leading gripping block clamps the trailing edge of the preceding sheet bar, and the trailing gripping block clamps the leading edge of the trailing sheet bar, Of the leading sheet bar and trailing sheet bar by the mounting mechanism, and after releasing the clamps of the leading gripping block and the trailing gripping block, the traveling speed of the moving mechanism is adjusted so that the joining portion of the seat bar is recessed. The gripping block having a recess is used to clamp the seat bar to correct the protrusion at the joint.

[0007]

[Operation] The trailing edge of the preceding sheet bar is clamped by the preceding grasping block, and the leading edge of the trailing sheet bar is aligned with the trailing edge of the preceding sheet bar so that the trailing edge of the trailing sheet bar is not misaligned. Then, while the upset mechanism presses the leading gripping block and the trailing gripping block so that they are close to each other, the reciprocating mechanism reciprocates the leading gripping block and the trailing gripping block so that their phases are opposite to each other in the width direction of the seat bar. To move. As a result, the unbalanced load due to the reciprocating motion is eliminated, and the vibration due to the reciprocating motion in the width direction of the seat bar can be prevented. Also, since it reciprocates in the width direction, there is little swelling at the joint.

While the moving mechanism is running at the same speed as the seat bar, the leading grip block clamps the trailing end of the preceding seat bar, the trailing grip block clamps the leading end of the trailing sheet bar, and the upset mechanism grips the leading grip block. And the trailing grip block are joined so as to be close to each other. After joining, the clamps of the leading gripping block and the trailing gripping block are released, and the traveling speed of the moving mechanism is adjusted so that the joining part is located in the concave part of one of the gripping blocks. If there is a recess in the preceding grip block, the traveling speed of the moving mechanism may be slower than the traveling speed of the seat bar.If there is a recess in the trailing grip block, the traveling speed of the moving mechanism may be lower than the traveling speed of the seat bar. You should do it soon. When the joint bar comes into the recess, when the sheet bar is clamped by the grip block having the recess, the protrusion of the joint is corrected to be lower than the height of the recess. Since the temperature of the sheet bar is usually about 1000 ° C., the protrusion can be smoothed by pressing the joint portion.
After pressing, the clamp is released and the moving mechanism is stopped.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of this embodiment, and FIG. 2 is A of FIG.
-A sectional view, FIG. 3 is a BB sectional view of FIG. 1, FIG. 4 is a CC sectional view of FIG. 3, and FIG. 5 is a DD sectional view of FIG.

In this device, two square frames 1, two beams 2 connecting the two at the upper part, and two vertical walls 3 connecting the two frames 1 form a main structure. The main structure travels on the rail 34 by the moving mechanism 30. A roll 31 is provided in the main structure, and a seat bar 32 runs on the roll 31.

The leading gripping block 4 and the trailing gripping block 5 penetrate through an opening formed in the vertical wall 3, are suspended by a link 6 attached to the beam 2, and move horizontally in the width direction of the seat bar 32. It is possible. The preceding grip block 4 includes an upper block 4a and a lower block 4b,
And an upper clamp plate 4c provided at the lower end of the upper block 4a and a lower clamp plate 4d provided at the upper end of the lower block 4b. Similarly, the trailing grip block 5 includes an upper block 5a, a lower block 5b, and an upper clamp plate 5c provided at a lower end of the upper block 5a.
Lower clamp plate 5 provided on the upper end of lower block 5b
d. The upper clamp plate 4c and the lower clamp plate 4d of the preceding grip block 4 are provided with upper recesses 4e and lower recesses 4f at opposing positions along the width direction of the seat bar 32 at opposing positions. FIG. 9B shows an arrangement state of the upper recess 4e and the lower recess 4f. Each recess 4
The shapes of e and 4f are not limited to the rectangle shown in the figure, but a triangle,
The shape may be a trapezoid.

In the preceding gripping block 4, the upper block 4a and the lower block 4b are integrally connected by the restraint frame 7 shown in FIG. In order to be integrated, the lower block 4b is pressed by the clamp cylinder 9, and the upper block 4a is pressed down via the restraint frame 7. Similarly to the trailing gripping block 5, the upper block 5a and the lower block 5b are integrally coupled by the clamp cylinder 9 via the restraint frame 8 shown in FIG.

The vertical wall 3 is provided with an opening through which the leading gripping block 4 and the trailing gripping block 5 pass. As shown in FIG. 2, an upset cylinder 11 and a push beam 12 are provided in this opening to press the trailing grip block 5 toward the leading grip block 4 side. The upset cylinder 11 and the push beam 12 form an upset mechanism 10. The stroke of the upset cylinder 11 is about several mm.

The left end of the leading gripping block 4 and the right end of the trailing gripping block are connected to the brazing alloy tool 14 via pins 13. A shaft hole is provided at one end of the pre-alloy tool 14,
An eccentric shaft 15 which has the same center as the center a of the shaft hole and rotates around a position b which is away from the center a by an eccentric amount d is fitted in the shaft hole. When the eccentric shaft 15 is rotated around the position b, the shaft hole of the pre-alloy tool 14 moves up, down, left and right, but the up and down movement component is only moved up and down around the pin 13, and is not transmitted. Only the moving component in the left-right direction is transmitted to the preceding gripping block 4 and the trailing gripping block 5 via the pin 13 to reciprocate these blocks 4, 5. The value of the amount of eccentricity d is several mm. The eccentric shaft 15 is rotatably supported by bearings 16 on both sides thereof, and is connected to a reciprocating motor 19 via a clutch 17 and a brake 18. The pin 13, the alloying tool 14, the eccentric shaft 15, the bearing 16, the clutch 17, the brake 18, and the reciprocating motor 19 include a reciprocating mechanism 20.
Make up.

FIG. 6 shows another embodiment of the reciprocating mechanism 20. Eccentricity d different from each other by 180 °
The eccentric shaft 15 is provided with an eccentric part, and the eccentric part is adapted to be fitted to the pre-alloy tool 14. Other than that, the structure is the same as that shown in FIG. Is
Reciprocating motor 1 via clutch 17 and brake 18
9 is connected. The pin 13, the alloying tool 14, the eccentric shaft 15, the bearing 16, the clutch 17, the brake 18 and the reciprocating motor 19 constitute a reciprocating mechanism 20.

The moving mechanism 30 comprises wheels 25, a traveling motor 26, a speed reducer 27, a universal joint 28 for transmitting the output of the speed reducer 27 to the wheels 25, and a traveling motor control device (not shown). A roll 31 is provided on the traveling path of the seat bar 32 to rotatably support the seat bar 32.

FIG. 7 is a view for explaining a line in which the seat bar friction welding device 35 having the above-mentioned structure is provided. The friction welding device 35 is a coil box 3 that winds and unwinds the sheet bar 32 in the hot rolling line.
6 and the finishing rolling mill 37. (A) is for joining while traveling at the same speed as the seat bar 32,
The moving mechanism 30 is attached to the friction welding device 35 as in the present embodiment.
Must be provided. (B) is for joining the sheet bar 32 in a stationary state, and the finish rolling mill 37 is used even during the joining period.
In order to supply the sheet bar 32 to the sheet bar 32, an accumulator 38 that stores the sheet bar 32 by raising and lowering the roll is provided between the friction welding device 35 and the finish rolling mill 37. In this case, the friction welding device 35 includes a moving mechanism 30.
Is unnecessary. The case (a) will be described below.
The present invention can be easily applied to the case (b).

Next, the operation will be described. The preceding sheet bar 32a unwound from the coil box 36 is
The sheet bar 32a is passed through the stationary friction welding device 35 and enters the finishing rolling mill 37 to be rolled.
When the rewinding is completed, the rewinding of the succeeding sheet bar 32b is started, and the rewinding is performed with the trailing end of the preceding sheet bar 32a and the leading end of the following sheet bar 32b being in contact with each other. When the rewinding of the preceding seat bar 32a is completed, the friction welding device 35 also starts moving in the traveling direction of the seat bar 32, and the position where the trailing end of the preceding seat bar 32a and the leading end of the following seat bar 32b are in contact with each other. However, when it comes to the middle of the preceding grip block 4 and the trailing grip block 5, the traveling motor control device controls so that the traveling speeds of the sheet bar 32 and the friction welding device 35 become the same.

In such a state, the clamp cylinder 9 of the preceding grip block 4 operates and the lower block 4b.
Of the preceding seat bar 32 with the upper clamp plate 4c and the lower clamp plate 4d.
a Clamp the rear end. Then, the clamp cylinder 9 of the trailing gripping block 5 operates, and the leading end of the trailing sheet bar 32b is clamped by the upper clamp plate 5c and the lower clamp plate 5d.

When the trailing end of the preceding sheet bar 32a and the leading end of the trailing sheet bar 32b are clamped in this state, the sheet bar 32 is lifted above the upper surface of the roll 31 and is separated from the roll 31. Next, the upset cylinder 11 operates to press the trailing grip block 5 via the push beam 12. Since the leading grip block 4 is constrained from moving in the traveling direction of the seat bar 32 by the opening edge of the vertical wall 3, the pressing force of the upset cylinder 11 is applied to the trailing end of the leading seat bar 32a and the trailing seat bar 32.
b Add to the joining surface at the front end.

In this state, the reciprocating motor 19 is rotated to operate the reciprocating mechanism 20. Preceding grip block 4
So that the reciprocating mechanism 20 connected to the reciprocating mechanism 20 and the reciprocating mechanism 20 connected to the trailing gripping block 5 have a moving phase difference of 180 °, that is, when the leading gripping block 4 moves to the right. The block 5 is adjusted to move to the left by the same distance. Thus, it is possible to prevent the occurrence of vibration due to the operation of the reciprocating mechanism 20. Figure 8 is 180 °
2 shows a state in which the left and right reciprocating mechanisms 20 are operated with a phase difference of. Even in the case of the other reciprocating mechanism 20 shown in FIG. 6, the leading gripping block 4 and the trailing gripping block 5 reciprocate with a phase difference of 180 °, and vibration can be prevented from occurring.

Pressing by the upset cylinder 11,
By the reciprocating motion of the reciprocating mechanism 20, the rear end surface of the preceding seat bar 32a and the front end surface of the following seat bar 32b are
Oxide scales formed on the surface slide against each other and are destroyed and removed, and the contact portion is heated by frictional heat to be activated and pressed.

The joint portion 33 thus pressure-welded is
As shown in FIG. 9 (a), the shape is largely swelled up and down, and if it is left as it is, a great impact is given to the finish rolling mill 37. For this reason, the recesses 4e and 4f provided so as to face the clamping surfaces of the upper clamp plate 4c and the lower clamp plate 4d of the preceding grip block 4 have a smooth shape.

When the joining portion 33 is formed by pressure welding, the clamps of the leading gripping block 4 and the trailing gripping block 5 are released, and the traveling speed of the friction welding device 35 is reduced by the moving mechanism 30 to form the joining portion 33. The pre-gripping block 4 has a recess 4e provided on the upper clamp plate 4c and a recess 4f provided on the lower clamp plate 4d so that the pre-gripping is performed again at the same speed as the seat bar 32. The seat bar 32 is clamped at block 4. Since the temperature of the seat bar 32 is about 1000 ° C., the sheet bar 32 is clamped, so that a large bulge of the joint 33 is pressed to have a smooth shape as shown in FIG. 9B. After this, the clamp is opened, the traveling of the friction welding device 35 is stopped, and the device returns to the initial position in preparation for the next welding.

FIG. 10 is a view showing the relationship between the seat bar 32, the leading gripping block 4 and the trailing gripping block 5.
(A) shows a state where the seat bar 32 is not joined and the seat bar 32 is traveling between the clamp plates of the preceding grip block 4 and the following grip block 5 at a constant speed. In this case, the friction welding device 35 is stopped. (B) shows a state of pressure contact, and the friction pressure welding device 35 travels at the same speed as the seat bar 32. (C) is the joint 3
3 shows a state in which a large bulge of No. 3 is pressed by the recesses 4e and 4f provided in the preceding grip block 4 to make it smooth,
The friction welding device 35 runs at the same speed as the seat bar 32.

In the above-mentioned embodiment, the concave portion is preliminarily held by the grasping block 4
However, it may be provided on the trailing grip block 5. In this case, the speed of the friction welding device 35 needs to be faster than the speed of the seat bar 32 in order to bring the joint 33 to the recess position. Further, although the reciprocating mechanism 20 and the upsetting mechanism 10 frictionally press-contact with each other, the upsetting mechanism 10 alone can also be pressure-welded.

[0027]

As is apparent from the above description, the present invention reciprocates by reciprocating the leading gripping block and the trailing gripping block for friction bonding so that their phases are opposite to each other. Vibration can be prevented. Further, the joint portion can be pressed by the concave portion provided in the preceding grip block or the trailing grip block to smooth the protrusion portion formed in the joint portion.

[Brief description of drawings]

FIG. 1 is a plan view of the present embodiment.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a sectional view taken along line CC of FIG.

5 is a cross-sectional view taken along the line DD of FIG.

FIG. 6 is a diagram showing another example of a reciprocating mechanism.

FIG. 7 is a diagram showing an installation position of the present embodiment in a hot rolling line.

FIG. 8 is a diagram illustrating a reciprocating operation of a reciprocating mechanism.

FIG. 9 is a diagram illustrating a shape of a joint portion and a state in which the joint portion is corrected.

FIG. 10 is a diagram showing a relationship between a seat bar and a grip block at the time of non-bonding, at the time of bonding, and at the time of correcting a bonded portion.

[Explanation of symbols]

 1 frame 2 beam 3 vertical wall 4 leading gripping block 5 trailing gripping block 4a, 5a upper block 4b, 5b lower block 4c, 5c upper clamp plate 4d, 5d lower clamp plate 4e upper recess 4f lower recess 6 link 7, 8 restraint Frame 9 Clamp cylinder 10 Upset mechanism 11 Upset cylinder 12 Push beam 13 Pin 14 Alloy alloy tool 15 Eccentric shaft 16 Bearing 17 Clutch 18 Brake 19 Reciprocating motor 20 Reciprocating mechanism 25 Wheels 26 Traveling motor 27 Reducer 28 Universal joint 30 moving mechanism 31 roll 32 seat bar 32a leading seat bar 32b trailing seat bar 33 joining portion 34 rail

Claims (2)

[Claims] 1. A leading grip block that clamps a trailing end of a leading sheet bar from above and below, and a trailing grip that clamps the trailing end of a trailing sheet bar from above and below with the leading end of the trailing sheet bar aligned. An upset mechanism that presses the block, the leading gripping block and the trailing gripping block close to each other in the longitudinal direction of the seat bar, and the leading gripping block and the trailing gripping block have opposite phases in the width direction of the seat bar. And a reciprocating mechanism that reciprocates so that the sheet bar is pressed and joined. 2. A leading gripping block that clamps a trailing end of a leading seat bar from above and below, and a trailing gripping block that clamps the trailing end of a trailing sheet bar from above and below while aligning the leading end of the trailing sheet bar with the trailing end of the leading sheet bar. An upset mechanism that presses the block, the leading gripping block, and the trailing gripping block toward each other in the longitudinal direction of the seat bar, and moves the leading gripping block, the trailing gripping block, and the upsetting mechanism in the longitudinal direction of the seat bar. A moving mechanism for moving the seat bar at the same speed as the seat bar is provided at a position facing the upper and lower clamp surfaces of the preceding grip block or the trailing grip block along the width direction of the seat bar. The middle leading gripping block clamps the trailing edge of the leading sheet bar, and the trailing gripping block clamps the leading edge of the trailing sheet bar, After joining the end face of the preceding sheet bar and the end face of the following sheet bar by the mechanism and releasing the clamp of the preceding grip block and the trailing grip block, the traveling speed of the moving mechanism is adjusted and the joint part of the seat bar comes to the recess. The seat bar pressure welding device is characterized in that the seat bar is clamped by a gripping block having a concave portion to correct the protrusion of the joint part.