JPH028632Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a device for automatically transferring coated arc welding rods on a cart after drying onto a conveyor, for example to an accumulation hopper.

(Prior Art) During the manufacturing process of coated arc welding rods, there is a process of painting flux around the core wire. Multiple frameworks with flux-coated welding rods placed side by side are stacked on top of each other and placed on a trolley and sent to a drying oven. After drying, the welding rods are placed on a trolley in the stacked framework and pulled out to the drying oven outlet, and then all of the welding rods are pulled out in the framework on the trolley and sequentially transferred to a conveyor heading to a collection hopper. Ru. Conventional methods for this transfer include: - A method for extracting the welding rod from each frame by input; A method for attracting and rotating the welding rod with a magnetic roller to pull out the welding rod from the frame; A method for tilting the frame and allowing the welding rod to fall freely. There is also a method in which the frame carrying the stacked welding rods is moved onto the accumulation hopper conveyor and transferred one frame at a time.Also, there is a device that uses an electromagnet to attract, transfer, and deposit multiple welding rods from above the frame. However, with this device, there is no problem in removing the welding rod on the top frame, but when taking out the welding rod on the next frame, the upper frame becomes an obstacle and cannot be transferred. Therefore, it took many man-hours to remove the upper frame, which could not be said to be efficient. In the above-mentioned work, the balance between the welding rod manufacturing processes could not be maintained, creating a bottleneck in the process, and there were problems in terms of occupational safety and health, such as dust disposal caused by friction between the welding rods and back pain due to working posture. This has led to a strong desire for improvement.

(Problem to be solved by the invention) The invention efficiently pulls out a large number of welding rods lined up on a stacked framework from the stacked framework, and arranges them on the adjacent conveyor. The purpose of the present invention is to provide an efficient, inexpensive, and occupational safety and health-friendly transfer device for transferring items so that they can be arranged in the same state as they are.

(Means for Solving the Problems) The present invention provides a frame lifting device that places a coated coated arc welding rod on a frame and lifts and lowers the stacked frames by a controlled height, and the coated arc welding rod. A movable electromagnet that moves an electromagnet that has an attractive surface corresponding to the end surface of the rod and can perform magnetization and demagnetization back and forth over a controlled distance horizontally in the rod length direction of the covered arc welding rod with respect to the end surface of the covered arc welding rod. The subject matter is an automatic transfer device for coated arc welding rods, which is characterized by being equipped with a device.

(Function) The present invention is a cycle operation in which coated arc welding rods arranged on a frame stacked on a trolley are pulled out horizontally in the rod length direction by sequentially attracting the end faces of the rods from the upper row using electromagnets. , relates to a device that operates in a controlled manner to carry the electromagnetic attraction to a conveyor and cut it off.

The proposed device operates as follows.

The welding rods are aligned on the framework stacked on the trolley, and the framework is raised and lowered to the height of the electromagnet.
The end face of the welding rod is attracted to the electromagnet while it is magnetized by passing an electric current through it, and by moving the electromagnet horizontally in the length direction of the welding rod, the welding rod is moved to the conveyor position, and at that position. The current of the electromagnet is cut off, the welding rod is demagnetized, and the welding rod is dropped onto the conveyor. Timing and speed of movement of the framework to the lifting position,
Welding rods are efficiently and automatically transferred by sequentially controlling the moving distance, the time and amount of current applied to the electromagnet, and the moving timing, speed, and moving distance of the moving electromagnet device.

When the end face of the welding rod is attracted to the electromagnet, the welding rod cannot be avoided to be slightly longer or shorter within the range specified by JIS due to processing deviations. A device that has an elastic contact plate such as a rubber plate that adapts to changes in length and moves and presses the rod end by a required amount brings the welding rod into contact with the electromagnet attraction surface to prevent the welding rod from being attracted to the electromagnet and leaking. improve efficiency.

In addition, if there is residual magnetism in the welding rod on the conveyor, it will have a negative effect on the welding work using that welding rod and on the weld metal, so it is necessary to demagnetize the residual magnetism in the welding rod that has been previously attracted by an electromagnet. Equipment included. The welding rod demagnetizing device can be installed near the welding rod on the conveyor, or it can be installed inside or outside the electromagnetic device.

(Example) Next, embodiments of the present invention and their effects will be described.

FIG. 1 shows an embodiment of the present invention, and FIG. 1 shows a plan view, FIG. As shown in Figure B, the welding rod carrier 1 sent from the drying oven has the following:
Frames in which welding rods 3 are arranged are loaded on frames 2 that are stacked one after another. The truck is constructed by pressurizing oil into the lower part of the hydraulic cylinder 4 from the inlet 4', thereby aligning devices 5, 12, 13 and moving electromagnet devices 7, 8.
It will rise to the appropriate position where it can operate and stop. The number of stages of the frame to be pulled out can be set as desired, from one frame to multiple stages, depending on the structure of the framework and the size of the welding rod.
A limit switch consisting of a solenoid valve (not shown) and a phototube switch 24 is provided to adjust the supply of pressure oil to the hydraulic cylinder 4 to the required height, and the dimensional tolerance during elevation is controlled within ±5 mm.

As shown in Figure A, the electromagnet 7 is magnetized by receiving a controlled magnetizing current at a position close to the end surface 16 of the welding rod 3, and attracts the end surface 16 of the welding rod 3. At the same time, the non-magnetic stainless steel plate 12 with a surface abutting the elastic member 19 is swung back and forth by a distance controlled by the air cylinder 13 serving as a power source and the rod end aligning arm 5, so that the welding rod 3 described above is exposed. The welding rod is moved by an amount corresponding to the length of the welding rod 3 so that the coated end surface 17 opposite to the core wire end surface 16 is pushed and reliably pressed against the electromagnet adsorption surface 18. Elastic material 19 attached to the front of stainless steel plate 12 For example, rubber material has elasticity, so the error in rod length within JIS standards is ±2 mm.
Even if this occurs, there will be no problem with adsorption. Further, the suction part of the welding rod is not limited to the above description, as the required work can be performed using either the coated end surface or the bare wire end described above.

The electromagnet 7 is held by a mounting support 8, and the mounting support 8 is connected to a forward end limit switch 2 to ensure safety by feeding two ball screws 9 ₁ and 9 ₂ .
5. The maximum feed amount is limited by the reverse end limit switch 26, and the rod length of the welding rod 3 is 250 to 900 mm.
DC motor 1 is adjusted according to the distance range from the frame position of the welding rod end to the conveyor position according to changes in
4, it is electrically reciprocated. The rotation of the DC motor 14 simultaneously rotates the ball screws 9 ₁ and 9 ₂ via bevel gears 15 ₁ and 15 ₂ . The rotation of the DC motor 14 is controlled by the number of pulses by an electric motor 10 serving as a driving source and an NC controller 11 to be described later.

When the adsorption of the welding rod 3 by the electromagnet 7 is completed,
The electromagnet 7 and the mounting support 8 begin to move backward due to the rotation of the ball screw 9, and the welding rod 3 is pulled out from the frame 2 in the rod length direction. In this case, the adsorption force in the electromagnet 7 is adjusted in accordance with changes in the rod length of the welding rod from 250 to 900 mm and core wire diameter of 2.0 to 9.0 mm, and moreover, the attraction force in the electromagnet 7 is adjusted according to the change in the rod length of the welding rod from 250 to 900 mm and the core wire diameter from 2.0 to 9.0 mm. It has enough suction power to withstand it. In this way, the welding rod 3 can be easily taken out with the frames 2 stacked together.

When the electromagnet 7 is at the retreat end 7', the coil current is cut off, the electromagnet is demagnetized, and the welding rod is dropped onto a conveyor driven by a motor 23 and moved in the direction of the arrow 21, as shown in Figure C. It is accumulated in the stack hopper 22.

Further, the electromagnet 7 has a function of demagnetizing the welding rod 3 by applying a demagnetizing alternating current to the coil before the welding rod is dropped. By demagnetizing the welding rod 3, the residual magnetism of the welding rod 3 can be reduced to 60 Gauss or less, and problems such as mutual attraction due to magnetism on the conveyor can be prevented.

The NC controller 11 is an electrical control device, and controls the arbitrary distance, time, and opening/closing of current for reciprocating motion, applying pressure oil to the upper and lower hydraulic cylinders 4 of the bogie, magnetizing and demagnetizing the electromagnet 7, and aligning the ends of the rods. The air to the air cylinder 13 of the device, the welding rod demagnetizing device 7, and the moving electromagnet devices 7 and 8 are each controlled by inputting signals from the phototube switch 24, the forward end limit switch 25, the backward end limit switch 26, and others (not shown). It is something that can be done.

Each of the above steps constitutes one cycle, and each device repeatedly operates to pull out the welding rod 3 from the frame 2 and send it onto the conveyor 20.

FIGS. 1A, 1B, and 1C show one embodiment, and other design changes may be made without changing the gist of the present invention.

(Effects of the invention) This makes it possible to transfer the coated arc welding rods in the stacked frames on the cart as they are from the drying oven onto the conveyor in an orderly manner, which has an effect on production. is extremely large.

[Brief explanation of the drawing]

Figure 1 is a diagram illustrating a device according to an embodiment of the present invention, in which A is a plan view, B is an elevational view taken along A-A, and C is B.
- It is an elevational view of B arrow direction. 1: Welding rod carrier, 2: Frame, 3: Welding rod,
4: Hydraulic cylinder, 4': Inlet, 5: Bar end alignment arm, 7: Electromagnet, 8: Mounting support, 9: Ball screw, 10: Electric motor, 11: NC controller, 12: Stainless steel plate, 13 : Air cylinder, 14: DC motor, 15: Bevel gear,
16: Bare wire end, 17: Covered end, 18: Electromagnetic attraction surface, 19: Rubber material, 20: Conveyor, 21: Arrow, 22: Laminated hopper, 23: Motor, 24: Phototube switch, 25 : Forward end limit switch, 26: Reverse end limit switch.

Claims (1)

[Claims for Utility Model Registration] (1) Covered arc welding rods 3 arranged in a frame 2
A framework 2 configured to be able to pull out the rod in the longitudinal direction,
3, a frame lifting device 4, 4' for lifting and lowering the stacked frames by a controlled height, and a suction surface 18 corresponding to the end surface of the coated arc welding rod for controlling magnetization and demagnetization. The coating is characterized in that it is equipped with moving electromagnet devices 7 and 8 that move an electromagnet 7 back and forth in a controlled distance in the horizontal direction of the rod length of the covered arc welding rod with respect to the end surface 16 of the covered arc welding rod. Automatic transfer device for arc welding rods. (2) having a contact surface of the elastic material 19 corresponding to the other end surface 17 of the coated arc welding rods arranged in the frame;
It is characterized by having alignment devices 5, 12, 13 that move the corresponding surface by a controlled amount of movement in the direction of the other end surface of the covered arc welding rod and bring the covered arc welding rod into contact with the attraction surface 18 of the moving electromagnet device. An automatic transfer device for coated arc welding rods according to claim (1) of the above-mentioned utility model registration. (3) The utility model according to claim 1 or 2, characterized in that it is equipped with a demagnetizing device 7 for a covered arc welding rod that is attracted to and moved by an electromagnet of a moving electromagnet device. Automatic transfer device for coated arc welding rods.