CN105278451A - Scram interlocking device and system - Google Patents

Abstract

The present invention relates to an emergency stop interlocking device and system, including a numerically controlled machine tool, N detection relays for detecting emergency stop signal generation and N control relays for controlling emergency stop signal input to a controller, N>1; Each CNC machine tool is equipped with an emergency stop signal generation circuit formed by connecting an emergency stop switch and a detection relay coil in series, and the corresponding contacts of N detection relays are connected in series with N parallel control relay coils to form an interlock control circuit ; One contact of each control relay is used to connect the emergency stop signal input terminal of the corresponding CNC machine tool controller. The interlock device has a simple structure, less wiring, and the control power supply of each device is isolated. The emergency stop signal of any device can be quickly fed back to other devices. The emergency stop switch on any piece of equipment realizes the problem of emergency stop of the whole line.

Description

An emergency stop interlock device and system

technical field

The invention relates to an emergency stop interlock device and system, in particular to an emergency stop interlock device and system for multiple numerical control machine tools.

Background technique

With the development of industrial modernization, automation, and intelligence, and the continuous advancement of Industry 4.0, the large-scale assembly line processing operations in enterprises have become more and more intelligent and automated. Using truss robots to connect multiple CNC machine tools into an unmanned Operation of automated production lines has become a trend. However, on the automated production line, the emergency stop switch is set on each single CNC machine tool. Pressing an emergency stop switch can only emergency stop one CNC machine tool, and other CNC machine tools are still in working condition, which makes the emergency stop machine in front of the machine tool The backlog of products and the cut-off of products after the emergency shutdown of the machine cause unnecessary losses for the enterprise. Therefore, a solution is urgently needed to solve this problem, so that the emergency stop can be realized by interlocking. Press the emergency stop switch of any machine tool, Realize the emergency stop of the entire assembly line operation.

Contents of the invention

The object of the present invention is to provide an emergency stop interlocking device, which is used to solve the problem that the emergency stop of the whole line cannot be realized by the emergency stop switch on any piece of equipment on the assembly line.

To achieve the above object, the solution of the present invention includes:

An emergency stop interlocking device, including N detection relays used to detect emergency stop signals and N control relays used to control the input of emergency stop signals to the controller, N>1; each device is equipped with An emergency stop switch and a detection relay coil are connected in series to form an emergency stop signal generating circuit, and the corresponding contacts of N detection relays are connected in series with N parallel control relay coils to form an interlock control circuit; one contact of each control relay Both are used to connect the emergency stop signal input terminal of the corresponding equipment controller.

Further, the emergency stop switch is a normally closed switch, the contact of the detection relay is a normally closed contact, the contact of the control relay is a normally closed contact, and the device controller is a PLC.

An emergency stop interlocking system, including N CNC machine tools, N detection relays for detecting emergency stop signal generation and N control relays for controlling emergency stop signal input to the controller, N>1; each CNC The machine tool is equipped with an emergency stop signal generation circuit formed by connecting an emergency stop switch and a detection relay coil in series, and the corresponding contacts of N detection relays are connected in series with N parallel control relay coils to form an interlock control circuit; each One contact of the control relay is connected to the corresponding emergency stop signal input terminal of the CNC machine tool controller.

Further, the emergency stop switch is a normally closed switch, the contact of the detection relay is a normally closed contact, and the contact of the control relay is a normally closed contact. The controller of CNC machine tool is PLC.

In the present invention, by adding two relays on each piece of equipment to form an emergency stop interlocking device, it can effectively solve the problem that each equipment in the assembly line cannot realize the emergency stop of the whole line through the emergency stop switch on any one of the equipment. The structure of the interlocking device Simple, less wiring, the control power of each device is isolated, the emergency stop signal of any device can be quickly fed back to other devices, and the emergency stop interlock response is fast.

Description of drawings

Fig. 1 is the schematic diagram of embodiment 1 of emergency stop interlocking system;

Fig. 2 is a schematic diagram of Embodiment 2 of the emergency stop interlocking system.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Example 1 of emergency stop interlocking system

The following specifically introduces an emergency stop interlock system for CNC machine tools.

As shown in Figure 1, for three CNC machine tools and corresponding emergency stop interlock devices, the emergency stop interlock devices include: each machine tool is provided with an emergency stop signal generation circuit, that is, the emergency stop signal generation circuit of the first CNC machine tool The loop is formed by the emergency stop switch SB1 and the detection relay coil KA1-1 in series, the emergency stop signal generating circuit of the second CNC machine tool is formed by the emergency stop switch SB2 and the detection relay coil KA1-2 in series, the emergency stop signal of the third CNC machine tool The signal input circuit is formed by the emergency stop switch SB1 and the detection relay KA1-3 in series, and the power supply of the three emergency stop signal generating circuits is 24V power supply. Three control relay coils KA2-1, KA2-2, KA2-3 connected in parallel and one normally open contact of detection relay KA1-1, one normally open contact of KA1-2, one normally open contact of KA1-3 The points are connected in series at both ends of the 24V power supply to form a control interlock circuit, and the power supply of the control interlock circuit is 24V power supply. The normally closed contacts of the three control relays KA2-1, KA2-2, and KA2-3 are respectively connected to the emergency stop signal input terminals of the corresponding CNC machine tools, that is, one normally closed contact of the control relay KA2-1 is connected to the emergency stop signal Input terminal I0.0-1, a normally closed contact of the control relay KA2-2 is connected to the emergency stop signal input terminal I0.0-2, and a normally closed contact of the control relay KA2-3 is connected to the emergency stop signal input terminal I0. 0-3, the other ends of the normally closed contacts of the three control relays are all connected to the positive pole of the 24V power supply.

When the assembly line is working normally, each CNC machine tool is running normally, and the emergency stop switch is in the closed state at this time, and the detection relays KA1-1, KA1-2, KA1-3 and the control relays KA2-1, KA2-2, KA2-3 are all In the energized state, the normally open contacts of the detection relays KA1-1, KA1-2, and KA1-3 are closed, and the normally closed contacts of the control relays KA2-1, KA2-2, and KA2-3 are disconnected. At this time, each control There is no signal input to the emergency stop signal input terminals of the controller. When any emergency stop switch is pressed, the emergency stop signal input circuit of the CNC machine tool is opened, and the detection relay coil connected in series loses power. For example, when the emergency stop switch SB2 is pressed, the detection relay KA1-2 loses power. , so as to detect the contact action of the relay KA1-2, that is, the normally open contact KA1-2 is disconnected, the circuit where the normally open contact is located is disconnected, and the coils of the control relays KA2-1, KA2-2, and KA2-3 are disconnected. Electricity, the normally closed contacts KA2-1, KA2-2, and KA2-3 of the three control relays act, switching from the open state to the closed state, so that the emergency stop signal input terminals I0.0-1, I0.0- 2. There is an emergency stop signal input at I0.0-3, and the three CNC machine tools stop in an emergency at the same time.

Example 2 of emergency stop interlocking system

Above-mentioned embodiment 1 has provided the embodiment that the emergency stop switch is a normally closed switch, and the contact of the detection relay is a normally open contact. As other embodiments, the emergency stop switch can also be a normally open switch, and the contact of the detection relay is The normally closed contact, as shown in Figure 2, differs from Embodiment 1 only in that the emergency stop switch is a normally open switch, and the contacts of the detection relays KA1-1, KA1-2 and KA1-3 are normally closed contacts.

When the assembly line is working normally, each CNC machine tool is running normally. At this time, the emergency stop switch is in the disconnected state, the detection relays KA1-1, KA1-2, and KA1-3 are in the power-off state, and the control relays KA2-1, KA2-2 , KA2-3 is in the energized state, the normally closed contacts of the detection relays KA1-1, KA1-2, KA1-3 are closed, and the normally closed contacts of the control relays KA2-1, KA2-2, KA2-3 are disconnected, At this time, there is no signal input to the emergency stop signal input terminals of each controller. When any emergency stop switch is pressed, the emergency stop signal input circuit of the CNC machine tool is closed, the coil of the detection relay connected in series is energized, the coils of the three control relays are de-energized, and the normally closed contact of the detection relay From the closed state to the open state, the normally closed contacts KA2-1, KA2-2, and KA2-3 of the three control relays act, switching from the open state to the closed state, so that the emergency stop signal input terminal I0.0 -1, I0.0-2, and I0.0-3 all have emergency stop signal input, and the three CNC machine tools stop in an emergency at the same time.

The above embodiment provides the emergency stop interlocking control mode of three CNC machine tools. As other implementation modes, there may be two, four, or even more CNC machine tools for interlocking control.

The above-mentioned embodiment shows that the control relay contacts used are all normally closed contacts. As other implementation modes, the used control relay contacts can also be normally open contacts, and the control method is the same as that of Embodiment 1 and Embodiment 2. , just make corresponding changes to the program in the corresponding controller.

The above-mentioned embodiments give the implementation of the emergency stop interlock device and system on the CNC machine tool assembly line. As other implementation modes, the emergency stop interlock device and system can also be used in other assembly lines, such as glass grinding and other industries.

Example of emergency stop interlock device

The emergency stop interlocking device is exactly the same as the emergency stop interlocking device in the above system embodiments, so it will not be described again.

Specific embodiments of the present invention have been given above, but the present invention is not limited to the described embodiments. Under the idea given by the present invention, the technical means in the above-mentioned embodiments are transformed, replaced, and modified in ways that are easy for those skilled in the art, and the functions played are basically the same as those of the corresponding technical means in the present invention. 1. The purpose of the invention realized is also basically the same, and the technical solution formed in this way is formed by fine-tuning the above-mentioned embodiments, and this technical solution still falls within the protection scope of the present invention.

Claims (6)

1. An emergency stop interlock device, characterized in that, comprises N detection relays for detecting emergency stop signal generation and N control relays for controlling emergency stop signal input to the controller, N>1; each The equipment is equipped with an emergency stop signal generation circuit formed by a series connection of an emergency stop switch and a detection relay coil, and the corresponding contacts of N detection relays are connected in series with N control relay coils in parallel to form an interlock control circuit; each One contact of the control relay is used to connect the emergency stop signal input terminal of the corresponding equipment controller. 2. The emergency stop interlock device according to claim 1, wherein the emergency stop switch is a normally closed switch, the contact of the detection relay is a normally closed contact, and the contact of the control relay is Normally closed contact. 3. The emergency stop interlocking device according to claim 1, characterized in that the equipment controller is a PLC. 4. An emergency stop interlocking system, comprising N CNC machine tools, is characterized in that it also includes N detection relays for detecting the emergency stop signal generation and N control relays for controlling the emergency stop signal input to the controller , N>1; each CNC machine tool is equipped with an emergency stop signal generation circuit formed by a series connection of an emergency stop switch and a detection relay coil, and the corresponding contacts of N detection relays are connected in series with N control relay coils in parallel An interlock control loop is formed; one contact of each control relay is connected to the emergency stop signal input terminal of the corresponding CNC machine tool controller. 5. The emergency stop interlock system according to claim 4, wherein the emergency stop switch is a normally closed switch, the contact of the detection relay is a normally closed contact, and the contact of the control relay is Normally closed contact. 6. The emergency stop interlocking system according to claim 4, characterized in that, the controller of the numerically controlled machine tool is a PLC.