JPH0710867Y2 - Speed controller for welding equipment - Google Patents

Description

[Detailed description of the device]

[0001]

[Field of Industrial Application] This invention is a welding system in which welding speeds of welding equipment such as a rotating positioner for welding, a traveling carriage for welding, and a turning roller for welding can be set easily and with good reproducibility. A speed controller for equipment.

[0002]

2. Description of the Related Art A welding apparatus, for example, a small rotary positioner 1 shown in FIG. Is provided.

A chuck 6 for fixing an object to be welded (hereinafter referred to as a work) 7 is attached to the table 3, and the work 7 is held by the chuck 6 and fixed on the axis of the table 3. Has become. On the other hand, the table rotation motor 4 is adapted to drive the table 3 via the speed reducer 8. The work 7 is fixed to the table 3 and the handle 9 is operated to move the welding surface on the side surface of the work 7. The table 3 is tilted so that the welding opening of the welding torch 61 fixed to the welding jig faces each other, and the table 3 is rotated by operating the motor 4 to weld the circumference of the work 7.

At this time, the welding speed applied between the work 7 and the torch 61 varies depending on the diameter of the work 7.
Since the peripheral speed of the work 7 is different, the rotation speed of the table 3 is different. Therefore, at the time of welding, the rotation speed of the rotary table 3 is set to the welding speed / welding speed according to the diameter of the work 7.
In order to set the rotation speed of the table 3 to the calculated rotation speed by calculating the work diameter, for example, rotation of the control box 10 provided on the side of the base 2 and connected to the table rotation motor 4 Adjustment is performed by operating the adjustment knob 11.

The dial knob 11 is connected to the speed setting potentiometer of the servo circuit of the table rotation motor 4 provided in the control box 10.
The dial (display board) is marked with a scale.

[0006] However, the above scale is shown for the sake of convenience and does not correspond to the actual number of rotations of the table 3,
In order to facilitate the adjustment work at the site, for example, the number of revolutions of the table 3 corresponding to the scale is actually measured to create a conversion table, which is used as a guide when setting the speed.

[0007]

However, the above is troublesome because the number of rotations of the rotary table has to be calculated and adjusted every time the diameter of the work changes.

Also, since the adjustment is an analog setting which is made by adjusting the speed setting volume, it is difficult to make a fine adjustment especially between the scales and the reproducibility is poor. Therefore, even if the conversion table is used, there is a problem that the setting speed varies depending on the individual difference of the adjusting operator.

Therefore, an object of the present invention is to enable speed adjustment of a rotary device such as a rotary table easily and with good reproducibility.

[0010]

In order to solve the above-mentioned problems, an input means for setting a rotation diameter of a rotating device for giving a predetermined welding speed between an object to be welded and a welding torch and the welding speed thereof, An arithmetic processing unit for calculating the rotation speed of the rotating device from the setting data of the input unit, and a motor of the rotating device are connected to drive the motor to rotate the rotating device at the rotation speed calculated by the arithmetic processing unit. It is composed of control means.

The rotating device may be a welding rotary positioner having a rotating table, and the rotating diameter may be the diameter of the object to be welded placed on the rotating table.

The rotating device may be a welding turning roller, and the rotating diameter may be the roller diameter of the turning roller.

The rotating device may be a traveling carriage for driving having drive wheels, and the rotation diameter may be the drive wheel diameter.

The input means may be a digital switch.

[0015]

The welding machine speed controller thus configured sets the rotation diameter of the rotating device and the welding speed in the input means. For example, in the case of a rotating positioner for welding, such as a rotating positioner for welding, a workpiece placed on a rotating table is rotated by the rotation of the rotating table to give a welding speed between the workpiece and the torch for welding. , The work diameter is set. Further, in the case of a welding turning roller that applies a welding speed by rotating a work placed on the roller by rotating the roller, the diameter of the roller that gives rotation to the work is set. On the other hand, in the case of a traveling carriage for welding, in which the carriage travels on the workpiece by the rotation of traveling wheels provided on the carriage, and a welding torch attached to the carriage is provided with welding speed, the traveling wheel diameter is set. To do. The rotation diameter of the rotating device thus set is input to the arithmetic processing means together with the welding speed required between the work and the welding torch set in the input means at the same time, for example, welding speed / workpiece diameter. Is divided, and in the rotary positioner,
The angular velocity for obtaining the welding speed corresponding to the diameter of the work, that is, the rotation speed of the rotary table corresponding to the diameter of the work is output. Similarly, the turning roller outputs the rotation speed of the roller for obtaining the welding speed, and the traveling carriage outputs the rotation speed of the drive wheel. Based on this output value, the control means controls the motor so that the welding speed is applied between the work and the torch of each rotating device by driving the motor.

In the case of using a digital switch as the input means, the input data is set numerically. Therefore, reproducibility is good without causing individual differences in setting values when setting data. Moreover, the setting can be done easily.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 5 and FIG. 6 showing a conventional example. Speed controller for welding equipment shown in FIG. 1 (hereinafter referred to as controller) 2
0 is a rotating diameter setting digital switch 23 for setting the rotating diameter of the rotating device for giving a predetermined welding speed between the object to be welded and the torch for welding to the front panel 22 of the case 21, and the welding thereof. A welding speed setting digital switch 24 for setting the speed in units of 1 mm / min is provided. For these digital switches, for example, thumb rotary switches, dip switches, etc. that set data by the displayed numerical values are used, and the set value is set every time data is set, as in the case of using a volume. It is easy for anyone to set the data without changing.

In addition to the switches 23 and 24, the front panel 22 has a rotary fine adjustment volume 25, a rotation direction changeover switch 26, a lamp 27 for indicating an abnormal rotation, and a foot switch 28 for operating the controller 20.
Is provided with a connection connector 29 of the rear panel 30,
A power cord 31 and a motor output cord 32 are provided.

On the other hand, as shown in FIGS. 2 and 3, the case 21 is provided with an arithmetic processing means 33 and a control means 34 connected to the both digital switches 23 and 24, and the arithmetic processing means. For example, as shown in FIG. 2, 33 includes a D / A converter 35 and a first quadrant analog division circuit 36 using log amplifiers A, B, and C.

The D / A converter 35 converts the welding speed setting value and the rotating diameter setting value set by the digital switches 23 and 24 into predetermined analog voltages and inputs them to the analog dividing circuit 36. That is, the welding speed setting voltage is input to the log amp A, while the rotating diameter setting voltage is input to the log amp B and each logarithmically converted, and the output thereof is added to the subtraction circuit 37 and the welding speed / rotation is performed. The diameter is divided. Since this division calculation power is a logarithmic value, the log amp C
Inverse logarithmic conversion is carried out and output to the control means 34.

As the control means 34, for example, a DC servo motor control circuit 38 shown in FIG. 3 or the like is used. The control circuit 38 detects the voltage of the motor armature 40 by the detection resistor 39 and feeds it back to compare (match) with the speed setting voltage, that is, the output E ₀ of the arithmetic processing means, and according to the deviation value, the triac 41. The firing speed of the motor 4 is controlled by controlling the firing phase of. The control circuit 38 also includes the welding speed setting digital switch 24 in accordance with the characteristics of the motor 4 to be connected, the load, the presence / absence of a reduction gear, the reduction ratio, and the like.
For example, a correction circuit 42 for adjusting the gain of the input amplifier 41 for correcting the output E _{0 of the} arithmetic processing means is provided so that the work 7 can be moved at the welding speed set to.
Further, an adjustment voltage of the rotary fine adjustment volume 25 of the front panel 22 is applied to the addition point 43 so that the deviation of the rotation speed can be adjusted.

Further, the output circuit to the motor 4 is provided with a relay circuit 44 which is operated by the table rotation direction changeover switch 26 of the front panel 22, and the switch 26 reverses the connection to the motor 4 to rotate the same. You can change the direction.

Next, a method of using the controller 20 will be described. First, when the controller 20 is used in a circumferential welding device for a workpiece 7 such as the conventional welding rotary positioner 1 shown in FIG. 6, a speed controller 10 and a table rotation motor 4 which are provided in advance in the positioner 1 are used. Is disconnected, the motor output cord 32 of the controller 20 is connected to the table rotation motor 4 of the positioner 1, the correction circuit 42 is adjusted according to the motor 4 of the positioner 1 and the speed reducer, and then the work 7 is rotated. Attach to table 3. Next, front panel 2
The welding speed between the work 7 and the welding torch 61 and the rotation diameter at which the rotary table 3 gives the welding speed to the work 7, that is, the work diameter is directly set by a numeral on the digital switches 23 and 24 of 2, and the foot is connected to the connector 29. When the switch 28 is connected and the switch 28 is stepped on, the controller 20
The analog divider 36 of the digital switch 2
The welding speed / workpiece diameter is divided from the set values of 3 and 24 to calculate the angular speed of the rotary table 3, that is, the speed setting voltage corresponding to the rotational speed, and output to the servo circuit 34.
With this output, the servo circuit 34 drives the motor 4, and the drive causes the rotary table 3 to rotate at a welding speed corresponding to the work diameter, and the torch 61 performs welding. When the welding of the work 7 is completed and, for example, the diameter of the work 7 attached next to the rotary table 3 is different from that of the previous work 7, the diameter of the work 7 is directly set on the rotary diameter setting digital switch 23. When it is redone and the same operation as described above is performed, the analog divider 36 becomes
Calculate the number of rotations of the rotary table 3 with different work diameters,
Based on the calculated value, the servo circuit 34 rotates the rotary table 3 at a rotation speed at which a predetermined welding speed is obtained. On the other hand, even when the welding speed is different, the rotary table 3 can be easily rotated according to the welding speed by changing the setting of the welding speed setting digital switch 24 as in the above. Of course, even if the welding speed and the work diameter are both set differently, it suffices to change the settings of both digital switches 23 and 24. In this way, the digital switch 23,
Only by setting the work diameter and the welding speed to 24, a predetermined welding speed according to the work diameter is applied between the work 7 and the welding torch 61.

Next, a case where the controller 20 is used for the turning roller 49 shown in FIG. 4 will be described.
The turning roller 49 is provided on a rotating device including a motor 4 and a multi-wheel roller 50 driven by the motor 4.
A cylindrical work 7 is mounted, the work 7 is directly rotated by the roller 50, and the work 7 is welded and cut by a welding torch. Similarly to the above, the output code 32 of the controller 20 is used. Turning roller 4
9 is connected to the motor 4, and the correction circuit 42 is adjusted according to the motor 4 and the speed reducer. At this time, the diameter value of the roller 50 is set in the rotation diameter setting digital switch 23 regardless of the work diameter on the roller 50, and the welding speed of the work 7 is set in the welding speed setting digital switch 24. That is, in this example, as shown in the same drawing, the welding speed is applied to the work 7 by the rotation of the outer periphery of the roller 50 which is in contact with the work 7. Therefore, when the controller 20 is operated with this setting, the work 7 rotates at a predetermined rotation speed, and a predetermined welding speed is applied between the work 7 and the welding torch.

Further, the case where the controller 20 is used in the traveling carriage 59 shown in FIG. 5 will be described. The traveling carriage 59 is provided with a rotating device including a motor and drive wheels 62 driven by the motor on the carriage 60, and the flat work 7 is provided.
Welding torch 6 mounted on a trolley 60 running above
The welding is performed by the controller 1, and the controller 2
Connect the output code 32 of 0 to the motor of the traveling carriage 59,
The correction circuit 42 is adjusted according to the motor and the speed reducer. At this time, the diameter value of the drive wheel 62 is set in the rotation diameter setting digital switch 23, and the welding speed is set in the welding speed setting digital switch 24. That is, similarly to the above, since the welding speed is imparted by the rotation of the drive wheel 62, the traveling carriage 20 travels at a predetermined welding speed and is used for welding the carriage 62 when the controller 20 is operated at this setting. A predetermined welding speed is applied between the torch 62 and the work 7.

Although the controller 20 is composed of an analog circuit as the arithmetic processing means 33, the arithmetic processing means 33 may be composed of a digital circuit such as a microprocessor instead of the analog circuit. At that time, the division process may be performed by software, but a table in which the calculation result for the setting data is written may be prepared in advance. Further, the controller 20 may be directly incorporated in welding equipment.

[0027]

[Effect] Since the present invention is configured as described above, it is possible to easily set the welding speed of various welding equipment without looking at a conversion table and obtain a predetermined welding speed.

Further, in the case of using the digital switch, the welding speed can be set with good reproducibility and without causing individual difference in setting.

[Brief description of drawings]

FIG. 1 is a perspective view showing the appearance of an embodiment.

FIG. 2 is a block diagram showing a partial internal circuit of the embodiment.

FIG. 3 is a block diagram showing a partial internal circuit of the embodiment.

FIG. 4 is a perspective view of a turning roller.

FIG. 5 is a perspective view of a traveling carriage

FIG. 6 is a perspective view of a welding positioner showing a conventional example.

[Explanation of symbols]

 3 Rotary Table 4 Motor 7 Workpiece 23 Rotation Diameter Setting Digital Switch 24 Welding Speed Setting Digital Switch 35 D / A Converter 36 Analog Divider 38 Servo Circuit 42 Correction Circuit 61 Torch

Claims (5)

[Scope of utility model registration request] 1. Input means for setting a rotation diameter of a rotating device for applying a predetermined welding speed between a workpiece and a torch for welding and a welding speed thereof, and rotation of the rotating device based on setting data of the input means. A speed controller for welding equipment, comprising: arithmetic processing means for calculating the number; and control means connected to the motor of the rotating device and driving the motor to rotate the rotating device at the rotation speed calculated by the arithmetic processing means. 2. The speed controller for welding equipment according to claim 1, wherein the rotating device is a rotating positioner for welding having a rotating table, and the rotating diameter is a diameter of an object to be welded placed on the rotating table. For speed controller. 3. The speed controller for welding equipment according to claim 1, wherein the rotating device is a welding turning roller, and the rotation diameter is a roller diameter of the turning roller. 4. The speed controller for welding equipment according to claim 1, wherein the rotating device is a welding traveling carriage having drive wheels, and the rotation diameter is a drive wheel diameter. 5. The speed controller for welding equipment according to claim 1, 2, 3 or 4, wherein the input means is a digital switch.