JPS61182876A - Welding equipment having grinding equipment - Google Patents

Abstract

PURPOSE:To reduce a construction cost and equipment cost, to shorten a welding and grinding times and to increase the efficiency in processing line by integrating in block a grinding equipment inside welding equipment. CONSTITUTION:The supporting bed 11 of welding torch 10 is moved by being guided by the ball screw 18 for welding torch moving to weld welding zone 5, which is clamped by the upper part clamping die 36a and the lower part clamping die 37a. The grindstone 12b for grinding the weld lower part is guided by the guide rails 27, 28 for moving in the welding line direction the lower part grindstone and the grindstone 12a for cutting the weld upper part is guided by the guide rails 27, 28 on the rail for moving the welding torch and the grindstone is moved by ball screws 17, 29 in the welding line direction.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a welding device having a grinding device, and is a welding device that incorporates a grinding device into a device for butt welding steel strip or plate-shaped materials. There are laser, plasma, MIG, and TIG welding devices as ta devices.

[Conventional technology]

Conventionally, laser welding, MIG welding equipment, etc. have been used as equipment for butt welding steel plates or plate-shaped materials, but as shown in Fig. 2, after welding, the trailing plate 4a and the leading plate 4
In the welded part 5 with b, build-up or undercut as shown in Fig. 3 may occur. , stress concentrates on such irregularities and causes the weld to break. For this reason, a grinding device is generally provided on the downstream side of the welding device, the welded portion is sent to the position of the grinding device and stopped, and the welded portion is ground by the grinding device. Figure 4 is a side view of a process line with such equipment rows, where l is the welding equipment, 2 is the grinding equipment, 3 is the grinding wheel, and 4 is the welding equipment.
shows the plate material to be welded. Conventionally, it takes about 100 seconds to pass the plate through this grinding device, align the welding area with the center of the grinding wheel, and complete the grinding process, which greatly increases the efficiency of the process line. It was lowering it. Additionally, the construction and equipment costs of the grinding device itself were extra, creating a heavy burden.

On the other hand, as a welding machine that performs upset welding and cutting of the excess weld at the same position, an apparatus has been proposed in which the weld excess is cut by a flash trimmer at the welding position. (JP-A-51-121452, JP-A-52-6114
3) These devices are equipped with a shearer for cutting the ends of the leading and trailing steel plates and a flash trimmer on one side of the welding machine, and are configured to be used by inserting these into the internal space of the welding machine. ing. Clamping during cutting is done using a dedicated clamping device or an electrode on the exposed side, but in either case, an auxiliary clamping device is required, making the structure and operation complicated. Cutting work cannot be performed until welding is completed.

In addition, welds are corrected by cutting, but when there is a difference in thickness between the steel plates to be welded, it is difficult to completely remove excess metal, and undercuts cannot be corrected. However, there is still a problem when rolling is performed in the next step, for example.

[Problem that the invention seeks to solve]

The purpose of the present invention is to provide a device that reduces construction and equipment costs by integrating a grinding device into a welding device, shortens welding and grinding time, and improves the efficiency of a process line. do.

In addition, the present invention not only allows for the correction of undercuts in addition to cutting off excess metal, but also allows for a configuration in which grinding can be carried out sequentially as welding progresses, as necessary, to prevent problems caused by welding defects. The aim is to eliminate this problem and shorten work time.

[Means for solving problems]

In order to solve the above problems, the present invention provides a welding device for butting and welding plate materials such as steel strips.

(1) A grinding device for grinding the welded part after welding is attached to the welding device.

(2) The grinding device is configured such that the grinding wheel is movable along the weld joint from behind the welding device in the welding direction.

(3) The upper clamp die that clamps the end of the plate material is provided with a mechanism that can change the position between the welding clamp position and the grinding clamp position.

Furthermore, as an embodiment of the apparatus of the present invention, (4) the upper clamp die and welding back bar are divided into a plurality of pieces in the sheet width direction, and a position change mechanism is provided for each divided upper clamp die and back bar. establish. This position change mechanism is configured to freely change the positions of the upper clamp die located at the welding completed portion to a clamp position during grinding and the back bar to a retracted position as the welding torch moves.

(5) Preferably, the upper grinding device is configured to be moved by a rail for moving the welding torch.

(6) If the lower grinding device is moved by a rail for moving the shears built into the welding device, the overall structure will be simplified.

[Effect]

゛The welding equipment for butt welding plate materials such as strip steel is integrated with a grinding device for correcting excess thickness or undercuts in the weld, which reduces equipment costs and speeds up the weld correction process. Moreover, troubles such as breakage of welded parts during rolling etc. in downstream processes are reliably prevented.

〔Example〕

FIG. 1 shows an embodiment of the present invention. FIG. 1(a) is an overall front view of the device of the present invention, FIG. 1(b) is a side view showing the welding process, and FIG. 1(C) FIG. 2 is a side view showing the grinding process. The welding device 1 has a basic structure in which a grinding device 2 is added to a device consisting of a shearer that shears a welded portion 5 and a welding torch that clamps and welds this welded portion, and these are integrated on a common base 6. It becomes.

The welding torch IO is suspended from a welding torch support bed 11 via a welding torch support part 9, and this support bed 11 moves on a welding torch movement rail 43 guided by a welding torch movement ball screw 18. , welding part 5
to weld.

The welding part 5 with the trailing plate 4b is connected to the upper clamp die 36a, 3.
6b, and a lower clamp die 37a.

37b.

The grinding wheel 12a for grinding the upper part of the weld is guided on the rail 43 for moving the welding torch, and the grinding wheel 12b for grinding the lower part of the weld is guided by guide rails 27 and 28 for moving the lower grinding wheel in the direction of the weld line. ball screw 17.2
Move by 9. 13a and 13b are hydraulic motors for rotating the grindstone, 14a and 14b are cylinders for raising and lowering the grindstone head, 16a and 16b are guides for raising and lowering the grindstone, and 20 is an interlocking connection for simultaneously driving the ball screw for moving the grindstone up and down. The shafts 19a and 19b are connecting gears for transmitting their rotation, 22 is a motor for moving the grindstone, and 21 is a speed reducer.

Normally, in the welding process, the material to be welded 4 is moved to the welding part clamp die 3.
6a and 37a, and shear blades 51 and 52 cut the ends of both the entry and exit sides of the base material. 50 is the shear frame. After cutting, the shear frame 50 moves along the rail 7 to the standby position (offline) shown in FIG. 1(a).
Move to. Thereafter, as shown in FIG. 1(b), the moving table upper block 49, the upper clamp die 36b, and the lower clamp die 37b are integrated by the moving cylinder 48 and moved to the fixed table upper clamp die 36a and lower clamp die 37a sides. It is brought together and stopped right near the end face of the cut plate material 4 to be welded.

After stopping, the welding torch 10 moves in the direction of the cutting line to the welding position, and then descends to reach the welding position. At this time, the back bar 45 is rotated upward by the back bar lifting cylinder 44 around the bin 45a, and pressurizes the cut end of the welded part to be at the same level as the upper surface of the lower clamp die 37a, 37b. Then start welding,
The welding torch 10 moves in the direction of the cutting line to weld the welded portion.

In the apparatus of the present invention, the clamp positions of the clamp dies 36a, 36b are changed after welding is completed or while the welding torch 10 is moving, and the grinding is performed so as to follow the welding torch 10.

First, the operation when grinding is performed after welding is completed will be described. The back par 45 is lowered by the cylinder 44 to the retracted position. The clamp of the upper clamp die 36a on the fixed base side is released, the clamp die 36a is moved backward by the cylinder 42a, and it is pressurized downward in line with the tip of the lower clamp die 37a.Next, the upper clamp die 36a on the movable base side 3
6b is released, the cylinder 42b moves the clamp die 36a backward, and the lower clamp die 37b
Apply downward pressure to the tip of the

In addition, as a method for changing the clamp position of this clamp die,
A case will be described in which a vertical adjustment device (not shown) is built into the lower clamp on the movable table side. After releasing the clamp of the upper clamp die 36b of the moving table, the cylinder 42b moves the clamp die 36b rearward and pressurizes it downward in line with the tip of the lower clamp die 37b, and then the clamp of the upper clamp die 36a of the fixed table side is released. Open and cylinder 4
2a moves the clamp die 36a backward, and then aligns it with the tip of the lower clamp die 37a.Next, the clamp die on the movable table side is raised slightly while gripping the workpiece, and the moving cylinder is placed in the most advantageous position for grinding. 48 to adjust the position, the clamp die on the movable table side is lowered to the initial level. After that, the upper clamp die 36a on the fixed base side
Pressurize downward. In this way, the moving side lower clamp die 3
By providing a vertical adjustment device in 7a, it is possible to align the welded portion at the most suitable position for grinding, which is particularly advantageous when, for example, grinding is to be performed multiple times.

After the clamping is completed, the upper grinding machine is moved along the guide rail 43 and the lower grinding machine is moved along the guide rails 27 and 28 to the position of the workpiece 4 to be welded. This drive is performed by a motor 22. The rotation of the motor 22 is transmitted to the connecting shaft 20 via the reducer 21, and then to the ball screw 17.29 via the connecting gears 19a and 19b, so that the upper and lower grinders move at the same speed. . When the grinding machine reaches the position of the workpiece 4, the cylinder 14a for raising and lowering the upper and lower grindstones.

14b for positioning, and cylinders 15a and 15b for fine adjustment of pressure at the welded part to obtain optimum grinding conditions. In addition, if the weld position is out of alignment with the center position of the grinder, or if the target grinding position is moved away from the weld line, the motor 24a drives the ball screw 23a of the upper grindstone.
The lower grinding wheel is moved by rotating the motor 2.
4b by rotating the ball screw 23b. Further, before the part to be welded comes into contact with the grinder, the grindstones are rotated by the motors 13a and 13b, and finally the grinder is moved along the weld line by the motor 22 for grinding.

Here, the guide rail 43 of the upper grinding machine is connected to the welding torch l.
It is preferable to use the same guide rail as O (
(See FIG. 1(C)), the lower grinding machine 12b can be simplified in its entire structure by using the moving rail 7 of the shearing machine frame as shown in FIG.

In addition, in order to further shorten the welding and grinding time, a grinder 12a is installed to follow the movement of the welding torch 10.
, 12b can also be moved.

This has upper clamp dies 36a, 36b and a back par 45 30a for each cylinder.

This is achieved by dividing the cylinder block into a large number of cylinder blocks such as 30b, 31a, 31b, . . . and making the clamp die for each cylinder block individually operable. Each time the welding torch 10 passes through each clamp section, the clamp position of the upper clamp die is changed and the back bar is opened to allow the grinding device to enter that section. Thereby, it is possible to proceed with the grinding process without waiting for the welding torch to complete welding over the entire width of the welded material.

Furthermore, by controlling the position of the grinding wheel, sufficient grinding is possible even if there is a difference in thickness between the connected plates or if there is an undercut.

〔Effect of the invention〕

According to the present invention, the installation space, construction cost, and equipment cost of equipment for welding and grinding plate materials can be significantly reduced, and productivity in the process line can be significantly improved by shortening the welding and grinding processes. can. Furthermore, since a grinding device is used, there is an advantage in that even if there is a difference in thickness between the plates to be connected, excess thickness or undercuts can be completely removed.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the present invention, (a) is a front view, Cb
) is a side view showing the welding process, (c) is a side view showing the grinding process, Figure 2 is a cross-sectional view of the welded part of the plate with build-up, and Figure 3 is a cross-sectional view of the welded part of the plate with undercut. , 4th
The figure is a schematic side view of a process line showing the layout of a conventional welding machine and a grinding machine, and FIG. 5 is a partial side view showing a partially modified form of FIG. 1(C). l... Welding device 2... Grinding device 3... Grindstone 4... Welded material 4a... Trailing plate
4b... Leading plate 5... Welding part 6...
・Common base 7...Shearing machine moving rail 8...Shearing machine moving roller 9...Welding torch support part 10...Welding torch 11...Welding torch support head 12a, 12b...Grinding Grinding wheels 13a, 13b... Grinding wheel rotation motors 14a, 14b
...Cylinder 15a, 15b for raising and lowering the grindstone...Cylinder 16a, 16b for fine adjustment of pressure...Guide l7 for raising and lowering the grindstone...Ball screw 18 for moving the upper grinding machine...
・Ball screws 19a, 19b for moving welding torch・
...Ball screw series connection gear for moving the grinder 20...Connection shaft for moving the grinder 21...Reducer for moving the grinder 22...Motors 23a, 23b for moving the grinder...Welding position of the grindstone Ball screws for alignment 24a, 24b...motor 25 for welding position alignment of grindstone
a, 25b...Rail 26a for welding positioning of the grindstone;
26b... Roller for welding position alignment of grindstone 27.28...
・Guide rail 29 for moving the lower grinding machine...Ball screws 30a, 31a, 32a, 33a for moving the lower grinding machine
, 34a. 35a... Fixed base upper clamp cylinder 30b, 31
b, 32b, 33b, 34b. 35b...Moving table upper clamp cylinder 36a...
Fixed base upper clamp die 36b...Moving base upper clamp die 37a...Fixed base lower clamp die 37b...Moving base lower clamp die 40a, 40b...Upper clamp die movement rails 41a, 41b... Upper clamp die moving roller 42
a, 42b...Cylinder for moving the upper clamp die 43...Rail for moving the welding torch 44...Cylinder for raising and lowering the back bar 45...Back bar 46...Rail for moving the moving platform 47...Movement Roller for moving the table 48... Cylinder for moving the table 49... Upper block of the moving table 50... Shearing machine frame 51, 52... Shear blade

Claims (1)

[Claims] 1. In a welding device that butts and welds plate materials such as steel strips, an upper clamp die that clamps the ends of the plate materials,
A mechanism that can change the position between the clamp position during welding and the clamp position during grinding is attached, and a grinding device for grinding the welded part after welding is attached to the rear of the welding movement direction of the welding torch, and the grinding device welds the grinding wheel. A welding device having a grinding device configured to be movable along a joint. 2 The upper clamp die and back bar for welding are divided into multiple parts in the plate width direction, and each of the divided upper clamp dies and back bars is equipped with a mechanism that can change the position between the welding position and the grinding position. A welding device according to claim 1. 3. The welding device according to claim 1 or 2, wherein the upper grinding device is moved by a rail for moving a welding torch. 4. The welding device according to claim 1 or 2, wherein the lower grinding device is moved by a moving rail of a shearing machine.