JPS58135794A - Automatic supply device for coated electrode - Google Patents

Abstract

PURPOSE:To stabilize the removing work of coated electrodes from an electrode placing hopper in a production stage for coated electrodes by constituting said hopper tiltably and disposing an oscillating table on the discharge gate side of the hopper. CONSTITUTION:A hopper 6 contg. a prescirbed amt. of coated electrodes W is placed on a supporting member 14, and is titled around a fulcrum 0 by the operation of a cylinder 15. As the hopper 6 tilts, the electrodes W therein flow out by gravity by each piece through a gate 7, roll on a transfer guide 8 and enter the inside of the small hopper 10 in an oscillating talbe 11, where the electrodes are stored temproarily. When a specified amt. of the electrodes are stored therein, the table 11 starts oscilating, so that the electrodes are conveyed by each piece rightward on the table 11 and are transferred by a sooping conveyor 12 onto a screening conveyor 13. Since the hopper 6 is made tiltable, the need for inclining the bottom surface thereof is eliminated, and the storage capacity of the hopper is increased; in addition, the biasing of the electrodes owing to the abrasion of the covering material of the electrodes is eliminated, whereby the electrodes are moved smoothly and productivity is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic supply device for coated arc welding rods, and more specifically, in the production process of coated arc welding rods, dried rods are loaded into a hopper, and the rods are automatically taken out from the hopper and sent to a sorting conveyor. Relating to an automatic feeding device.

When producing coated arc welding rods, the welding rods coated with a coating agent are loaded into a hopper after being dried, and then fed in fixed quantities to a sorting conveyor.

Fig. 1 shows an example of a conventional welding rod feeding device. As shown in the figure, a stopper 2 for preventing leakage is provided at the outlet of a hopper 1 into which welding rods W are loaded, and a stopper 2 is provided at the outlet side of the hopper I. A hook-up type delivery guide 3 is disposed, and, following the delivery kit 3, a pick-up chain 4 for picking up bars and a horizontal sorting conveyor 5 are installed.

In the apparatus shown in FIG. 1, the bottom of the hopper is formed to be inclined (12 degrees in terms of sliding angle) toward the outlet so that the welding rod W can easily come out of the hopper 1. Welding rod W
The rod is released by manually opening gate 2,
Then, the delivery kite 3 is made into a gauze by a gauze chain 4 and fed to a sorting conveyor 5. The supply amount was adjusted by increasing or decreasing the area of the chain with blades using a vertical guide in the papermaking section or by adjusting the speed of the chain.

However, the conventional device described above often has the following drawbacks.

(1) Since the bottom of the hopper is sloped, the loading capacity is reduced accordingly.

(2) The welding rods are pushed out of the hopper by the loading pressure, but when the loading capacity decreases, it is difficult to get them out, so it is necessary to manually push them out to the exit side.

Therefore, it is labor intensive and inefficient.

(3) Friction between the welding rods at the front of the outlet may cause uneven wear of the coating material, which may cause the rod to skew and become impossible to discharge (usually once per hopper);
In such cases, the rods were aligned manually, but many defects (chips on the surface) occurred in the rods.

(4) The amount of paper taken out by the vertical guide in the paper removal section was adjusted, but the amount of paper taken out from the hopper was large in the first half and decreased in the second half, making it impossible to supply a constant quantity.

(5) Since the rods were moved and aligned in order to make them parallel in the papermaking section, the surfaces of the rods rubbed against each other, which was one of the causes of surface chipping.

The present invention eliminates or improves the above-mentioned drawbacks of the prior art, and
The purpose is to smoothly and automatically supply a fixed amount of welding rods, thereby improving the quality of coated arc welding rods and improving work efficiency in welding rod manufacturing. To achieve this object, the automatic welding rod feeding device of the present invention has a welding rod loading hopper equipped with a discharge gate that can be opened and closed at the bottom so that it can be tilted at any angle. The present invention is characterized in that a vibrating table is disposed to receive the welding rods flowing out due to the tilting of the hopper via a delivery guide and to supply the rods to the cutting conveyor in fixed quantities by vibration.

In the present invention, by tilting the hopper, the internal welding rod is allowed to flow out from the gate under its own weight, but in this case, the gate is automatically opened depending on the tilting position of the hopper. In addition, the vibration table has a small hopper on the entry side that receives the rods flowing out from the discharge gate via a guide and temporarily stores them.The vibration of the table aligns and feeds the rods, and By adjusting the amount of vibration, it is possible to feed the rod in a fixed quantity.

Embodiments of the present invention will be described below based on the drawings.

FIGS. 2 and 3 are an overall plan view and a side view showing an example of an automatic feeding device according to the present invention. As shown in the figure, the supply device includes a welding rod loading hopper 6 which has a discharge gate 7 on the lower side and the side and is installed so as to be tiltable in the welding rod supply direction, and a delivery guide 8 provided outside the discharge gate 7. , a gate opening/closing device 9 disposed at a position connected to the gate 7 when the hopper 6 is tilted (when the bar tilts to an angle where its own weight flows out), and a small hopper provided on the entry side following the delivery kite 8. It is composed of a vibrating table 11 having a diameter of 10 mm, a papermaking conveyor 12 connected to the output side of the vibration table 11, and a sorting conveyor 13 connected to the papermaking conveyor 12.

The four tilting operations of the welding rod loading hopper 6 are performed by an L-shaped support member 14f on which the box-shaped hopper 6 is placed, as shown in FIG.
A fulcrum O is provided on the discharge side of the supporting member 14, and a tilting cylinder 15 is installed at the lower part of the opposite side, and by operating the cylinder 15, the hopper 6 is tilted at an arbitrary angle as shown by the chain line, and the internal welding is performed. The rod W is discharged by its own weight. Therefore, there is no need to slope the bottom surface of the hopper 6 as in the conventional case, and the loading capacity can be increased. The tilting mechanism of the hopper 6 is not limited to the illustrated type, but other known mechanisms may also be adopted.

Next, details of the hopper gate opening/closing section will be explained based on FIG. 4, which is a detailed view of a portion of FIG. 3, and FIG. 5, which is a plan view thereof.

First, the delivery guide 8 is pivotally supported so as to be able to swing freely in the direction of inclination of the hopper 6, and a push spring 1 is attached to the back surface of the delivery guide 8.
6 is installed. Further, the upper surface of the guide 8 is formed so as to be substantially flush with the bottom surface of the hopper 6 when the hopper 6 is tilted as shown in FIG.

Further, a rack is carved on the outer surface of the gate 7 that rises and lowers at the lower opening of the hopper 6, and is held by a holder 17. The opening/closing device 9 that opens and closes the gate 7 is arranged at a position where it comes into contact with the gate 7 when the hopper 6 is tilted, and is composed of, for example, a pinion 18 that meshes with the rack of the gate and a forward/reverse motor 19 that rotates the pinion. Ru. As shown in FIG. 5, at least two gates 7 are required with an interval between them, and the same number of pinions 18 that mesh with the gates 7 are required.Furthermore, the driving force from the motor 19 is transmitted by two belts 20,
' 21 and the shafts n, 23 to the pinion 18. Further, the opening/closing device 9 is pushed toward the hopper by a separate push spring. 5 is a bearing that holds the shaft 22.

In addition, gate. Opening/closing device 9Il'i Mechanical means other than the rack-binion system may be substituted, and the opening/closing mechanism is not limited to the type that engages when the hopper is tilted as shown, but the opening/closing mechanism may be connected directly to the gate from the beginning. It is also possible.

Furthermore, the vibration table 11 installed following the delivery guide 8 is composed of, for example, an electromagnetic feeder that has been conventionally used as one of the feeders. This electromagnetic feeder uses an electromagnet as a vibrator to apply intermittent suction force to vibrate the table in the horizontal direction, and gradually moves the table by utilizing the inertia of the article placed on the upper surface. On the entrance side of the vibrating table 11, there is a small hopper l for temporarily storing a small amount of welding rods falling from the delivery guide 8.
An upper limit switch 27 and a lower limit switch 4 (or a proximity switch may also be used) are arranged above and below the hopper 10.

The final papermaking conveyor 12 is a known type equipped with blades for holding bars, followed by a sorting conveyor 13.
It also consists of a regular chain conveyor.

The operation of the automatic feeding device of the present invention configured as described above will be explained below.

After the hopper 6 containing a predetermined amount of coated welding rods W is placed in a fixed position on the L-shaped support member 14 by the transport device, the tilting cylinder 15 is started to tilt the hopper 6 about the fulcrum 0. When the inclination angle reaches a sufficient angle to allow the dead weight of the rod to flow out, the inclination confirmation limit switch 4 operates to stop the cylinder 15. In this tilted state of the hopper 6, the gate 7
contacts the pinion 18 of the opening/closing device 9, and the outflow end of the bottom surface of the hopper 6 engages with the delivery kite 8. The gate opening/closing device 9 and the delivery guide 8 come into contact with the hopper 6 elastically by the action of the springs u and 16.

Next, when the rack (gate) 7 is moved upward and opened by driving the motor 19 and rotating the pinion 18, the welding rod W in the hopper 6 begins to flow out and rolls through the delivery guide 8 to the vibration table 11. The water flows into the small hopper 10 and is stored therein.

When a certain amount of rods are stored in the small hopper 10, this is detected by an upper limit switch nail and the vibrating table 11 starts vibrating to start feeding the rods.

If the hopper side end of the vibrating table 11 is closed and the bars are fed from the small hopper 10 onto the table, the bars will be sequentially conveyed in the direction of the papermaking conveyor 12 as the table vibrates. In order to approximately balance the amount of rods discharged from the opening of the hopper 6 and the amount of rods fed by the vibration table 11, it is necessary to adjust the width of the opening by moving the gate 7 and adjust the frequency of vibration of the vibration table 11. Just go. When the amount of rods stored in the hopper 6 decreases, the pressing force of the rods decreases and the flow rate also decreases, so in this case, the cylinder 1
5, it is necessary to increase the inclination angle of Pa 1.6.

When all the rods are discharged from the hopper 6 yen (confirm by applying the limit switch), the rods in the small hopper IO also decrease and when they are completely discharged, the lower limit switch is activated.
The motor 19 of the gate opening/closing device 9 rotates in reverse to lower the gate 7 and close the opening. Then, the tilting cylinder 15 is also lowered to return the hopper 6 to its original horizontal position and replaced with another new hopper.

On the other hand, the bars fed in fixed quantities from the vibrating table 11 are picked up by the pick-up conveyor 12, and then transferred to the sorting conveyor 13 and sent to the sorting process.

According to the automatic feeding device of the present invention described above, the following effects can be obtained.

■ Everything from discharging the welding rods from the hopper to supplying them to the sorting conveyor can be done automatically, and since the hopper can be tilted at any angle, the rods can be discharged smoothly and quantitatively. is now also possible.

■ Since a vibrating chill pull is used as the rod feeding means, the rods can be stably fed in an aligned state, and there is also the advantage that the amount of rods fed can be adjusted by adjusting the amount of vibration.

■ The rod discharge gate opens and closes automatically, making work more efficient, and the amount of rod discharge can be controlled by adjusting the movement of the gate.

- Due to the above advantages, the overall transportation of the bar was smooth and the balance was good, so defects such as surface chipping were virtually eliminated.

■ Since the bottom of the hopper is not tilted, the loading capacity has been increased by approximately 10 inches compared to conventional hoppers.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an example of a conventional welding rod feeding device, FIG. 2 is an overall plan view showing an embodiment of the feeding device of the present invention, and FIG.
The figure is a side view of FIG. 2, FIG. 4 is a detailed view of the hopper gate opening/closing part in FIG. 3, and FIG. 5 is a plan view of FIG. 4. W...Welding rod, 6...Welding rod loading hopper, 7...
・Discharge gate, 8...Delivery kite, 9...Gate opening/closing device, 10...Small hopper, 11...Vibration table, 12...Paper finishing conveyor, 13...Sorting conveyor, 14... ...Supporting member, 15...Inclination cylinder,
16, 24...Press spring, 17,...Kate holder, 18...Pinion, 19...Motor, 27
゜28.29-...Limit switch. Patent applicant agent

Claims (1)

[Claims] A welding rod loading hopper with a discharge gate that can be opened and closed by an appropriate opening/closing device on the lower side is installed so that it can be tilted at any angle, and the hopper is discharged via a delivery guide on the outside of the discharge gate side and the input side of the hopper. An automatic supply device for coated arc welding rods, characterized by having a vibrating table having a temporary storage part continuous with a gate and connected to a welding rod pick-up conveyor at the outlet side.