JPS59127996A - Orderly winding device of welding wire - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a winding device for winding welding wire around a winding spool in multiple layers in an aligned manner.

In a winding device (hereinafter referred to as an alignment machine) that winds welding wire in multiple layers by aligning and closely contacting the body of a spool with flanges on both sides, the alignment winding is performed when a failure occurs during winding or at the end of winding. When trying to stop the machine, the welding wire becomes loose between the supply bobbin and the traverser. If the alignment winding machine is restarted without taking up the slack, the slack wire may kink or break due to excessive tension. Therefore, it is necessary to take up the slack before restarting the machine, but generally this is done manually by inching the alignment winding machine and carefully monitoring it visually, which of course increases the burden on the operator and the winding machine. The operating rate will drop significantly. In addition, if the welding wire is broken by starting the alignment winding machine without taking up the slack, not only is there a risk of danger to the worker, but it also takes time to repair the broken wire by welding the wire, which takes longer than the time it takes to correct the slack. Operation rate decreases.

Conventionally, a brake is attached to the winding spool and supply bobbin of an alignment winding machine to prevent slack, but the rotational inertia of the supply bobbin and winding spool changes as the amount of remaining wire and the amount of wire winding changes from moment to moment. The braking force required for stopping changes as the brake force changes, and this change is reversed, that is, one increases and the other decreases. Therefore, simply applying a constant braking force will cause the stop time of the take-up spool and the stop time of the supply bobbin to change. For example, the take-up spool may stop early, increasing the slack in the wire, or the supply bobbin may stop early, causing the wire to be pulled by the take-up spool and break. This problem of slack or wire breakage can be avoided by applying a braking force that corresponds to the amount of wire on the take-up spool and supply bobbin when stopped, but as the amount of wire changes from moment to moment as mentioned above, the adjustment process for this braking force is It's difficult. Dancer rollers are effective for solving the wire slack problem, but the dancer rollers installed in alignment winding machines are used to keep the winding tension constant during normal operation, and are not effective for this purpose. Although there is
When stopped, it descends to the lowest position and is not effective in preventing the wire from loosening when stopped.

The present invention has been made in view of the above-mentioned problems, and the wire is slackened when the winding is stopped, and this slack is absorbed by the slack prevention roller when the winding is stopped, which is provided separately from the dancer roller. I tried to prevent disconnection. That is, the present invention provides a welding wire aligning and winding device comprising a welding wire supply bobbin, a take-up spool, a dancer roller and a traverser provided therebetween, in which a welding wire winding device is provided between the supply bobbin and the traverser. The interior is characterized by being equipped with a loosening prevention roller that does not come into contact with the welding wire and that comes into contact with the wire to form a U-shaped portion when winding is stopped. will be explained in detail.

Figure 1 shows an alignment winding machine for welding wire! ! ll indicate the main points,
10 is a wire supply bobbin, 12 is a take-up spool, 12a
14 is a dancer roller for adjusting wire tension, 16 is a traverser, and 16a is its driving motor. In this device, a large amount of welding wire W is randomly wound around a bobbin 10, and the welding wire W is pulled out from the bobbin and wound in an aligned manner onto a spool 12, and when a predetermined amount is reached and winding is completed, the spool is replaced with a new spool. Instead, the same process is repeated from here on. Traverser 16 is spool 1
The wires are guided in a reciprocating motion so that the wires wound in two layers are closely wound and, when one layer is wound, the next layer is similarly wound closely together, that is, in alignment. The dancer roller mechanism 14 consists of a fixed roller 14a and a roller 14b that moves up and down. The wire W is wound between these rollers to form a loop. When the wire tension increases, the roller 14b moves up and the wire As the tension decreases, roller 14b lowers, thus keeping the wire tension constant. 18 is a loosening prevention roller mechanism provided in the present invention;
A roller 20 that is normally raised and not in contact with the wire W;
a pillar 22 that guides the vertical movement of the roller 20;
It is provided with a guide roller 26 and the like attached to the tip of an arm 24 that projects horizontally from.

FIG. 2 shows this loosening prevention roller mechanism 18 and the dancer.
FIG. 4 shows the roller mechanism 14 in more detail in a perspective view. The lower end of the support column 22 is movable on a rail 28, and the arm 30 supports a swing block 34 of a rewinding traverser 32.
connected to. An upper roller 14a of a dancer-roller mechanism is attached to the swing block 34, and a guide column 38 extending downward is attached to the guide column 38, and a lower roller 14b is slidably attached to the guide column 38. 36 is a horizontally extending guide arm, and the swing block 34 traverses along this guide arm. An air cylinder 44 for advancing and retracting a limit switch 40 and a catch 42 of the roller 20 is also attached to the upper part of the pillar 22 of the loosening prevention roller mechanism. 4
6 is a solenoid valve that sends compressed air to the cylinder 44 through pipes 48 and 50.

FIG. 3 is a diagram showing details of the roller 20 portion of the loosening prevention roller mechanism. The roller 20 is rotatably attached to a piece 20a, and this piece 20a fits in a groove 22a of the support column 22, and the groove wall, that is, the inner wall of the left and right nine columns 22,
0b, and is thus able to move up and down along the groove 22a. A horizontally extending arm 52 is attached to the piece 20a, and when the arm 52 comes into contact with the cone-shaped stopper 42, the roller 20 is held in the state shown in FIG. It engages with the operating arm of the switch 40 to operate the switch. FIG. 4 shows the arrangement and structure of the roller 20, the catch 42, the cylinder 44, etc. as viewed from the direction in which the wire travels.

During normal operation, the loosening prevention roller mechanism 18
is in the raised position and is not in contact with the wire W, which is the same as if it were not there. On the other hand, when the winding is stopped, the solenoid valve 46 is energized to send air to the cylinder 44, causing the catch 42 to retreat. As a result, the arm 52 and the catch 42 are disengaged, and the roller 20 falls freely and pushes the wire W downward. FIG. 5 is a diagram illustrating this state, where (8) is during normal winding and (b) is when winding is stopped. Normally, during winding, the wire W extends horizontally between the rollers 26 and 14a as shown in figure ta1, and is guided by these rollers and runs, but if the roller 20 falls when winding is stopped, +b
As shown in FIG. 1, the rollers 26 and 14a form a dogleg shape or even a deep U shape, thereby preventing the occurrence of slack. While stopped, the wire W remains in a U-shape between the rollers 26 and 14a, and when winding is resumed in this state, the wire W is pulled by the take-up spool 12, so the roller 20 The arm 52 is pushed upward and into a plucked-up shape and engages the limit switch 40 to operate it, that is, the switch 40 is operated. When the switch 40 is operated, the solenoid valve 46 is switched, and air is sent to the cylinder 44 in the opposite direction to move the catch 42 forward. This is done so quickly that before the lifted roller 20 falls, the catch 42 protrudes and engages the arm 52 to maintain the roller 20 in the state shown in FIG. In this way, normal aligned winding is started, and the lower roller 14b of the dancer roller 14 moves up and down to control the tension of the wire W at a constant level.

FIG. 6 shows a control circuit for this aligned winding machine. OIMH is the coil and contact of the power switch of the winding motor 12a.
In this case, the coil and contact are shown with the same symbol, the same applies to the others), 4M
C is that of the power switch of the reversing motor 12b. The reversing motor 12b is attached to the bobbin 10 and rewinds the wire from the spool 12 when irregular winding occurs. The swing block 34, dancer rolls 14a, 14b, etc. are traversed when the supply bobbin 10 is reversed so that the wire W climbs onto the bobbin 10 and is wound uniformly. 36 is a guide shaft for this traverse. 3φ is 3-phase AC power supply, Th+
, Th2 is the thermal relay, more specifically its heater,
Motors 2a and 12b are connected to the above power switches 01MR and 4M.
Power is supplied from a three-phase power supply via G and thermal relays Th+ and Th2. IOMR, 2MR, 8MR, 5MR are auxiliary relays, 2MT, 4MT are timers, TR is a transformer, RPC is a full wave rectifier, Bl, B2 are brakes, 46a
is the solenoid of the electromagnetic valve 46 mentioned above, which is connected to the single-phase AC power supply 1φ together with various contacts as shown in the figure.

To explain the operation, each contact is in the state shown in the figure when the power supplies 1φ and 3φ are not turned on. When the power is turned on, relay 2MR is energized, its normally closed contact (the contact with the bar on the left side of the pair of ○ marks) opens, and its normally open contact (the contact with the bar on the right side of the pair) closes.

When normally open contact 2MR closes, timer 2M7.4MT.

When the auxiliary relay 8MR is energized and the normally open contact 8MR is closed, the brake B1 of the supply bobbin 10 is energized to generate a braking force, and when the timer contact 4MT is closed, the brake B2 of the take-up spool 12 is also energized. These brakes generate braking force, but when timer contact 2MT opens, these brakes are deenergized and lose braking force. In other words, the brake operation when the power is turned on has no particular meaning.

When the starting pushbutton switch Pbl is pressed, its normally closed contact opens, so the auxiliary relay 2MR is deenergized and closes its normally closed contact, the power switch 01MR is energized and closes its normally open contact, and the winding motor 12a is activated. Activate. Push button switch Pbl
is opened after being pressed, so its normally open contact opens and its normally closed contact closes, but since the normally open contact of OIMH is connected in parallel to the normally open contact, the power switch 01MR is self-held, and Pbl Even if the normally closed contact of OIMR is closed, relay 2MR will not be energized because the normally closed contact of OIMR is open. When the take-up motor 12a starts, the limit switch 40 closes as described above. For this reason, IOMR, 2MR
, 40, the relay 5MR is energized, closes its normally open contact, energizes the solenoid 46a, and causes the catch 42 to protrude.

As a result, the roller 20 lifted up by the wire is held in the raised position.

To stop winding, push button switch Pb2 is pressed. This energizes the auxiliary relay 2MR, which opens its normally closed contact to de-energize the power switch 01MR and stop the take-up motor.It also closes its normally open contact to self-hold, and activates the timer as described above. 2MT, 4MT, auxiliary relay 8MR
energize. As a result, the supply side brake B1 and then the take-up side brake B2 are temporarily operated, and the normally closed contact of 2MR is opened, so that the relay 5MR is deenergized, the solenoid 46a is deenergized, and the catch 42 is activated. to retreat. As a result, the roll 20 falls, and if the tension in the wire W is small, the wire is bent into a dogleg or U shape to prevent it from loosening. The brake operates on the supply side first, but this is because the supply side has a larger capacity and greater inertia than the take-up side, so even if you do this, the brake will stop on the take-up side first, then the supply side. (Set the time etc. like this).

1 When reversing the take-up spool 12, push button switch Pb
Press 3. This switch has two normally open contacts, one of which energizes relay 2MR to perform the aforementioned braking action, and the other energizes power switch 4MC (but 2MT
After operation) close the normally open contact and turn the reverse rotation motor 12b
At the same time, the auxiliary relay 5MR is energized through the path of IOMR, AMC, and 40, and the receiver 42 is projected.

Since the roller 20 is stuck up even during the reverse rotation, the roller is in the state shown in FIG. 2.

The contact CT is a counter contact and closes when the take-up spool 12 rotates in a predetermined manner, and therefore when a predetermined amount of wire is wound onto the spool, thereby causing the auxiliary relay 10 to close.
MR is activated. This normally open contact energizes relay 2MR to perform the aforementioned braking operation, and the normally closed contact energizes relay 5MR.
The MR is deenergized, the catch 42 is moved backward, and if there is any slack in the wire, the slack is removed by bringing it into the state shown in FIG. 5Tb).

As explained above, in the present invention, the slack prevention roller is installed, and when the winding is stopped, the roller is lowered to absorb the slack by bending the wire into a dogleg or U shape, thereby preventing kinks in the wire. Does not occur and is valid. Further, since the slack prevention roller is not in contact with the wire at all times, that is, during winding, there is no need to increase the power required for winding and/or the wire tension.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the entire embodiment of the device of the present invention, and FIG.
3 and 4 are detailed views of a part of FIG. 2, FIG. 5 is an explanatory diagram of the slack removing operation, and FIG. 6 is a control circuit diagram. In the drawings, W is a welding wire, 10 is a supply bobbin, 12 is a take-up spool, 14 is a dancer roller, 16 is a traverser, and 18 is a slack prevention roller. Applicant: Nippon Steel Welding Industry Co., Ltd. Representative Patent Attorney Minoru Aoyagi 3

Claims (1)

[Claims] In a welding wire aligning and winding device comprising a welding wire supply bobbin, a take-up spool, a dancer roller and a traverser provided between these, a welding wire is provided between the supply bobbin and the traverser during winding. 1. A welding wire aligning and winding device, characterized in that a loosening prevention roller is installed which does not contact the wire and comes into contact with the wire to form a U-shaped portion when winding is stopped.