JPH04130407U - Magnetization direction automatic switching device - Google Patents

Abstract

(57) [Summary] [Configuration] Magnetizing coil 2 for magnetizing the magnetized body 1
is connected to a power supply circuit 4 via a main relay 3 for switching the direction of flowing current. An auxiliary relay 8 controlled by a controller 7 is connected to the main relay 3 to perform its switching operation. An image recognition device 10 for recognizing the type of the magnetized body 1 is connected to the controller 7 via a model setting circuit 9. By switching the main relay 3 via the auxiliary relay 8 by the controller 7 according to the magnetization direction of each model of the magnetized body 1, the direction of the current flowing through the magnetization coil 2 is determined according to the forward or reverse direction of the magnetization direction. automatically switch. [Effect] It is possible to perform magnetization work by automatically switching between forward and reverse magnetization directions depending on the type of magnetized object, and
By checking the switching operation of the main relay 3 using each of the third contacts 5c and 6c, malfunction can be prevented.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a magnetization method that automatically switches the magnetization direction according to the type of magnetized object. This invention relates to an automatic direction switching device.

0002

[Conventional technology]

Conventionally, in a magnetizing machine for magnetizing a magnetized object, for example, DC1000V and A current of 3 to 4 kA is passed through the magnetizing coil to magnetize the object to be magnetized. covered The direction of magnetization may be reversed depending on the type of magnetized object, and the method of setting the magnetized object may be changed depending on the type of magnetized object. In order to magnetize without changing the direction, it is necessary to change the direction of the current flowing through the magnetizing coil as appropriate. It is a good idea to make it possible to do so. If the magnetization direction can be switched, there is a magnetization control. Some models have a large knife switch installed between the power supply circuit and the power supply circuit. When doing so, visually check the type of magnetized material and set the knife switch for each direction of magnetization. was operated manually.

0003 In the magnetizing machine with the above structure, the type of the object to be magnetized can be visually confirmed and the The knife switch is manually operated by determining whether the direction of magnetization is forward or reverse. There is a problem in that switching operations for different magnetization directions depending on the body are cumbersome.

0004

[Problem that the idea aims to solve]

In view of the problems of the conventional technology, the main purpose of the present invention is to Depending on the type of magnetization, the device switches the magnetization direction and performs magnetization. An object of the present invention is to provide an automatic magnetization direction switching device that can automate switching.

[0005]

[Means to solve the problem]

According to the present invention, this purpose is achieved by using a magnetizing coil for magnetizing a magnetized body. , the magnetizing coil and the power supply circuit can switch the direction of the current flowing through the magnetizing coil. is predetermined depending on the relay device installed between the a determination means for determining the forward or reverse direction of magnetization for each magnetized object; a controller for controlling the switching operation of the relay device according to the discrimination signal; and a device provided in the relay device to confirm the switching operation of the relay device. By providing an automatic magnetization direction switching device characterized by having a contact point with will be achieved.

[0006]

[Effect]

In this way, the discriminating means can determine whether the direction of magnetization is forward or reverse with respect to the magnetized object. Then, the controller switches the relay device according to the determination result. The direction of the current flowing through the magnetizing coil can be changed, making it possible to switch the direction of magnetization. It can be done automatically.

[0007]

【Example】

Hereinafter, the present invention will be described in detail with reference to specific embodiments with reference to the accompanying drawings.

[0008] FIG. 1 is a circuit diagram showing a magnetizer to which the present invention is applied, in which a magnetized object 1 is magnetized. In order to switch the direction of the current flowing through the magnetizing coil 2, A power supply circuit 4 is connected via a large-capacity main relay 3.

[0009] The main relay 3 has first and second relay parts 5 and 6 each having three normally open contacts. For example, DC1000V supplied from the power supply circuit 4 and 3kA. It can withstand a current capacity of about One terminal a of the magnetizing coil 2 and the power supply circuit and the positive terminal of the line 4 are connected to each other via the first contact 5a of the first relay section 5. , the other terminal b of the magnetizing coil 2 and the negative terminal of the power supply circuit 4 are connected to the second terminal of the first relay section 5. They are connected to each other via contacts 5b. Furthermore, the terminal a of the magnetizing coil 2 and the power supply circuit are The negative terminal of the line 4 is connected to each other via the first contact 6a of the second relay section 6, and magnetized. The terminal b of the coil 2 and the positive terminal of the power supply circuit 4 are connected via the second contact 6b of the second relay section 6. and are connected to each other. Further, the third contact 5c of the first relay section 5 is connected to the magnetizing machine. Connected between output terminal O1 and input terminal I1 of controller 7 for controlling The third contact 6c of the second relay section 6 is connected to the output terminal O1 of the controller 7. It is connected between terminal I2. The contact signals of both third contacts 5c and 6c and check each operation of the first and second relay parts 5 and 6 that constitute the relay device. Can be done.

0010 The output terminal O1 of the controller 7 has a small capacity auxiliary relay 8 with two positions selected. The common terminal of the type contact 8a is connected, and the normally closed terminal of the contact 8a is connected to the first line. It is connected to one end of the coil of the relay section 5. The other end of the coil of this first relay section 5 is grounded. The normally open terminal of the contact 8a of the auxiliary relay 8 is connected to the normally open terminal of the contact 8a of the auxiliary relay 8. It is connected to one end of the coil, and the other end of the coil is grounded. In addition, supplementary The coil of the auxiliary relay 8 is connected between the output terminal O2 of the controller 7 and the ground terminal E. It is continued. In this way, both relays 3 and 8 constitute a relay device. There is.

[0011] The input terminal I3 of the controller 7 receives the output of the model setting circuit 9 as a determination means. A signal is input to the model setting circuit 9, and an image recognition device 10 is input to the model setting circuit 9. A recognition signal is input from. This image recognition device 10 recognizes the type of the magnetized object 1. It consists of a known image processing structure. Another input end of controller 7 The child I4 includes a start switch 11 for selectively starting the power supply circuit 4. These switch signals are input. Depending on that switch signal, The signal output from the output terminal O3 of the controller 7 is connected to the switch terminal of the power supply circuit. It is designed to be input to SW.

0012 Next, the operating procedure of this magnetizing machine will be described below with reference to the flowchart of FIG.

[0013] In step ST1, for example, the magnetized coil 2 is sent from an automated line. Image processing of the shape of the magnetized object 1 set at a predetermined position nearby is performed. This is done by the recognition device 10. In the next step ST2, based on the image recognition data, The model of the magnetized body 1 is determined, and in step ST3, the magnetization set in advance for each model is Based on the forward and reverse direction data, if the magnetization is in the forward direction, proceed to step ST4; If the magnetization is in the opposite direction, the process proceeds to step ST5.

[0014] If it is a model that is magnetized in the forward direction and proceeds to step ST4, that step In step ST4, an excitation signal is output from the output terminal O2 of the controller 7 to provide assistance. Turn on relay 8. Then, the contact 8a of the auxiliary relay 8 moves to the normally open terminal side. Because of this switching, the second relay section 6 of the main relay 3 is turned on. And then the next In step ST6, it is determined whether or not the second relay section 6 is in the on state by checking its third contact. It is determined by the contact signal input from 6c to controller 7, and if it is on, the next Proceed to step ST7.

[0015] In step ST7, it is determined whether the other first relay section 5 is in the off state or not. The determination is made based on the contact signal input from the third contact 5c to the controller 7. That is, When the auxiliary relay 8 is in the on state, the second relay part 6 is in the on state and the first relay part 6 is in the on state. - section 5 is turned off, so if both conditions are met and it is normal, step Proceed to ST8, turn on the start switch 11 in step ST8, and proceed to step S. At T9, the power supply circuit 4 is turned on by the output signal from the output terminal O3 of the controller 7. Then, a current is applied to the magnetizing coil 2 in a direction corresponding to forward magnetization.

[0016] Also, if the model is magnetized in the opposite direction and proceeds to step ST5, then In step ST5, contrary to the above, the auxiliary relay 8 is turned off, and the next step is started. In step ST10 and step ST11, the first relay section 5 is turned on. It is determined whether the second relay section 6 is in the OFF state or not. auxiliary When the relay 8 is in the off state, the first relay part 5 is in the on state and the second relay part is in the on state. 6 is in the off state, so if both conditions are satisfied and normal, step ST 8 and step ST9, where the current is applied in a direction corresponding to reverse magnetization, which is opposite to the above. Flow.

[0017] Return from step ST9 to step ST1, repeat the above operation, and return to the line. The type of the magnetized body 1 that is sent is automatically determined and automatic magnetization work is performed.

[0018] By the way, if the contacts of each relay part 5 and 6 are welded, the auxiliary relay Since the relays 5 and 6 do not switch regardless of the operation of step 8, the above step If the second relay section 6 is in the off state in step ST6, or if the second relay section 6 is in the off state in step ST7, If the first relay part 5 is in the ON state in step ST10, or if the first relay part 5 is in the ON state in step ST10, If the relay section 5 is in the OFF state, or if the second relay section 6 is in the OFF state in step ST11. If it is in the ON state, it is determined that there is an abnormality and the process goes to step ST12. move on. In step ST12, the output terminal O of the controller 7 to the power supply circuit 4 is The signal from step ST13 is turned off to stop the magnetization work, and then to the next step ST13. Then, the controller 7 issues an alarm signal to an alarm device (not shown) and ends the process. do.

[0019]

[Effect of the idea]

In this way, according to the present invention, the object to be magnetized can be magnetized for each type by image recognition, for example. It determines whether the direction is forward or reverse, and switches the relay circuit according to the determination result. By changing the direction of the current flowing through the magnetic coil, the magnetization direction can be switched automatically. This allows you to visually recognize the magnetized object and manually operate knife switches, etc. There is no need to switch the magnetization direction by It can improve sex. Also, a relatively large current flows through the switching contacts of a relay device, but the The operation switching confirmation contact monitors whether the relay device has been properly switched. This makes it possible to prevent malfunctions due to abnormalities such as welding of contacts.

[Brief explanation of drawings]

FIG. 1 shows a circuit of a magnetizer to which the present invention is applied.

FIG. 2 shows the flow of magnetization work based on the present invention.

[Explanation of symbols]

1 Magnetized object 2 Magnetizing coil 3 Main relay 4 Power supply circuit 5 1st relay section 5a 1st contact 5b Second contact 5c 3rd contact 6 Second relay section 6a 1st contact 6b Second contact 6c 3rd contact 7 Controller 8 Auxiliary relay 8a Contact 9 Model setting circuit 10 Image recognition device 11 Start switch

Claims (1)

[Scope of utility model registration request] 1. A magnetizing coil for magnetizing a magnetized object, a relay device provided between the magnetizing coil and a power supply circuit so as to be able to switch the direction of a current flowing through the magnetizing coil, and a magnetizing coil. Discrimination means for determining for each magnetized body whether the direction of magnetization is forward or reverse, which is predetermined according to the type of the magnetized body;
It is characterized by comprising a controller for controlling the switching operation of the relay device in response to a discrimination signal from the discrimination means, and a contact provided on the relay device for confirming the switching operation of the relay device. Automatic magnetization direction switching device.