Safety protection device for machine tool machining equipment

Abstract

The utility model relates to the technical field of machine tool processing, in particular to a safety protection device for machine tool processing equipment, which is triggered by a magnetic glove worn by an operator to stop the machine tool processing equipment, and comprises an array magnetic switch circuit and a machine tool sudden stop circuit, the array magnetic switch circuit comprises an array magnetic switch and a relay K1, a coil of the relay K1 is connected with the array magnetic switch in series and then is connected with a power supply to form the array magnetic switch circuit, the array magnetic switch is formed by connecting a plurality of normally-closed magnetic induction switches in series, and the array magnetic switch is arranged on the working surface of the machine tool; a group of normally open contacts of the relay K1 are connected with a machine tool sudden stop circuit; when the magnetic glove triggers the normally-closed magnetic induction switch, the array magnetic switch circuit is disconnected, the relay K1 is powered off, the machine tool sudden stop circuit is synchronously disconnected, and the machine tool machining equipment stops working. The utility model has the advantages of simple structure, low cost and convenience in installation, and can be applied to the transformation of the existing machine tool and the new machine tool.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tool processing, and particularly relates to a safety protection device for machine tool processing equipment. Background Art

[0002] In today's industrial production field, machine tool processing equipment plays a crucial role. At present, many machine tool processing equipment on the market, such as shearing machines, bending machines, punching machines, etc., during operation, are often accompanied by high-speed rotating tools, strong pressure, and complex mechanical movements. Once an operator accidentally touches these dangerous areas, it is very likely to cause serious personal injuries. In order to reduce the occurrence of safety accidents, the common protection methods for such equipment mainly include protective covers and infrared point-to-point detection, but the above protection methods all have certain defects.

[0003] The method of using a protective cover can indeed separate the workpiece from the human body to a certain extent and provide a certain degree of safety protection for the operator. However, after adding the protective cover, when the operator is operating, they need to frequently open and close the protective cover, or operate under the restriction of the protective cover, which undoubtedly greatly increases the complexity and time cost of the operation. In some processing processes that require frequent adjustment of the workpiece position or fine operation, the protective cover may seriously obstruct the operator's line of sight and movement, making the operation extremely inconvenient, thus significantly reducing the work efficiency.

[0004] Although the infrared point-to-point detection method can detect the situation of a human body approaching a dangerous area to a certain extent, thereby triggering corresponding safety measures, such as stopping the equipment operation, etc. However, this detection method also has many drawbacks. First of all, it has obvious blind spots. Due to the point-to-point detection method, its detection range is very limited and it is difficult to fully cover the entire dangerous area. In some complex machine tool processing equipment, there may be dangerous points at multiple angles and positions, and it is difficult for infrared point-to-point detection to fully cover these areas, which is likely to leave potential safety hazards. Secondly, this detection method is extremely easy to be blocked or interfered by workpieces. During the processing process, the shapes, sizes, and positions of workpieces are different, and it is very likely to block the infrared detection points, resulting in the interruption or misjudgment of the detection signal. In addition, dust, oil stains, etc. generated during the processing process may also interfere with the infrared detection and affect the accuracy of the detection. Moreover, the infrared point-to-point detection method often requires adjustment and maintenance. Since its detection effect is easily affected by workpiece and environmental factors, in order to ensure the accuracy and reliability of the detection, it needs to be adjusted and maintained frequently. This not only increases the maintenance cost, but also may affect the normal operation time of the equipment and bring unnecessary trouble to production.

[0005] In summary, the protection methods of the current machine tool processing equipment on the market all have relatively large limitations and cannot fully meet the requirements of safe production. Summary of the Invention

[0006] The utility model provides a safety protection device for machine tool processing equipment to solve the technical problem that the existing safety protection device of machine tool processing equipment cannot meet the requirements of safe production.

[0007] To solve the above problems, a safety protection device for machine tool processing equipment provided by the utility model adopts the following technical solutions:

[0008] A safety protection device for machine tool processing equipment is triggered by a magnetic glove worn by an operator to stop the operation of the machine tool processing equipment. The safety protection device includes an array magnetic switch circuit and a machine tool emergency stop circuit. The array magnetic switch circuit includes an array magnetic switch and a relay K1. The coil of the relay K1 is connected in series with the array magnetic switch and then connected to the power supply to form an array magnetic switch circuit. The array magnetic switch is composed of a plurality of normally closed magnetic induction switches connected in series. The array magnetic switch is arranged on the working surface of the machine tool; a set of normally open contacts of the relay K1 is connected to the machine tool emergency stop circuit;

[0009] When the magnetic glove triggers the normally closed magnetic induction switch, the array magnetic switch circuit is opened, the relay K1 is powered off, and the machine tool emergency stop circuit is synchronously disconnected, and the machine tool processing equipment stops working.

[0010] As a preferred technical solution of the utility model, the plurality of magnetic induction switches are distributed in a linear array, a two-dimensional matrix, a circular distribution or an irregular distribution.

[0011] As a preferred technical solution of the utility model, the distance between adjacent magnetic induction switches is 3-5 cm. The distance between adjacent magnetic induction switches can be adjusted as needed. The shorter the distance, the denser the detection area.

[0012] As a preferred technical solution of the utility model, the magnetic induction switch is an anti-interference magnetic induction switch.

[0013] As a preferred technical solution of the utility model, the power supply is a 12V, 24V or 36V safety DC power supply.

[0014] As a preferred technical solution of the utility model, the machine tool emergency stop circuit is provided with an alarm.

[0015] Working principle: When the magnetic gloves worn by the operator approach the working surface of the machine tool and trigger the magnetic induction switch, the array magnetic switch circuit is opened, the relay K1 is powered off, the normally open contact of the relay K1 is in the open state, the emergency stop circuit of the machine tool is disconnected, and the machining equipment of the machine tool stops running. When the magnetic gloves are far away from the working surface of the machine tool, the magnetic induction switch is in the closed state, and the normally open contact of the relay K1 remains closed, that is, both the array magnetic switch circuit and the emergency stop circuit of the machine tool are in the normal conduction state, and the machine tool equipment starts normally at this time.

[0016] The beneficial effects are as follows:

[0017] 1. The utility model can prevent safety accidents where the operator's hand enters the working space of the machine tool machining equipment during operation. By arranging an array magnetic switch at the position to be protected on the working surface of the machine tool, connecting the coil of the relay K1 in series with the array magnetic switch and then connecting it to the power supply to form a circuit, and connecting a set of normally open contacts of the relay K1 in series with the emergency stop circuit of the machine tool; when the magnetic gloves worn by the operator enter / approach the working surface of the machine tool and trigger the array magnetic switch, the relay K1 is powered off and released, the emergency stop circuit of the machine tool is disconnected, and the machine tool stops working, thus avoiding safety accidents.

[0018] 2. The utility model has a simple structure, low cost and convenient installation, and can be applied to the transformation of existing machine tools and newly developed machine tools, with broad application prospects. Description of the Drawings

[0019] By referring to the following detailed description with reference to the drawings, the above and other objects, features and advantages of the exemplary embodiments of the present utility model will become readily understood. In the drawings, several embodiments of the present utility model are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0020] Figure 1 is a schematic structural diagram of the present utility model;

[0021] Figure 2 is a schematic circuit principle diagram of the present utility model.

[0022] Description of the Reference Numerals in the Drawings:

[0023] 1. Machine tool; 2. Magnetic gloves; 3. Array magnetic switch; 4. Emergency stop circuit of the machine tool. Detailed Embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] The quantity of any element in the accompanying drawings is for illustration rather than limitation, and any naming is only for distinction without any limiting meaning.

[0026] Next, the principles and spirit of the present utility model will be elaborated in detail with reference to several representative embodiments of the present utility model.

[0027] In existing machine tool processing equipment, it is usually inevitable that workers' misoperations cause their limbs to enter the shearing area of the machine tool processing equipment, thus triggering safety accidents. For example Figure 1 and 2 As shown in a safety protection device for a machine tool processing equipment, a magnetic glove 2 worn by an operator triggers an emergency stop circuit of the machine tool, causing the machine tool processing equipment to stop running, thereby preventing accidents in advance. The safety protection device includes an array magnetic switch circuit and an emergency stop circuit 4 of the machine tool. The array magnetic switch circuit includes an array magnetic switch 3 and a relay K1. The coil of the relay K1 is connected in series with the array magnetic switch 3 and then connected to a power supply to form an array magnetic switch circuit. A set of normally open contacts of the relay K1 is connected in series with the emergency stop circuit 4 of the machine tool.

[0028] The array magnetic switch 3 is composed of a plurality of normally closed magnetic induction switches connected in series. The array magnetic switch is mounted on the working surface of the machine tool 1 and is used to detect that when the magnetic glove 2 approaches the working surface of the machine tool, the magnetic induction switch is disconnected, thereby realizing the disconnection control of the array magnetic switch circuit. The working surface of the machine tool refers to the surface on the machine tool for placing workpieces and performing processing operations. When the magnetic glove 2 approaches the working surface of the machine tool 1 and triggers the magnetic induction switch, the emergency stop circuit 4 of the machine tool immediately takes effect and stops the operation of the machine tool 1. The triggering distance of the emergency stop action of the machine tool 1 can be adjusted by the installation position of the magnetic induction switch. In this embodiment, the array magnetic switch 3 is mounted on the upper working surface of the machine tool 1, and the array magnetic switch 3 is distributed in a linear array. Of course, in other embodiments, the array magnetic switch 3 can also be mounted on the lower working surface of the machine tool 1, and the array magnetic switch 3 can also be distributed in a two-dimensional matrix, a circular distribution or an irregular distribution.

[0029] The two-dimensional matrix distribution is arranged in regular rows and columns like a chessboard grid, forming a planar detection area. This allows for the detection of the approach of the magnetic glove 2 from multiple directions simultaneously, improving the detection accuracy and comprehensiveness. For example, on the working surface of a large-area machine tool 1, magnetic switches can be set at the intersections of rows and columns at different positions to more accurately determine the specific position and approach direction of the magnetic glove 2 on the plane.

[0030] The annular distribution is arranged in a ring around the key parts or specific operating areas of the working surface of the machine tool 1. This distribution method is particularly suitable for some circular machining areas that need to be protected or around rotating components. When the magnetic glove 2 approaches the annular area, magnetic switches at different positions can be triggered in sequence, providing more accurate approach information and also enabling monitoring from all angles to prevent operators from accidentally approaching dangerous areas from different directions.

[0031] The irregular distribution is arranged irregularly in a personalized manner according to the specific shape of the working surface of the machine tool 1, the characteristics of the machining process, and potential dangerous areas. This distribution method can fully consider the special structure and operating requirements of the machine tool 1, densely arrange magnetic switches at the positions where danger is most likely to occur, and appropriately reduce the distribution in relatively safe areas to achieve more efficient detection and protection, while also saving costs and resources.

[0032] The magnetic induction switch is a normally closed magnetic induction switch with strong anti-interference ability. The normally closed magnetic induction switch is in a closed state under normal conditions and is in an open state when a magnet acts. In this embodiment, the magnetic induction switch is a magnetic induction proximity switch. The distance between adjacent magnetic induction switches is 3 cm. Of course, in other embodiments, the distance between adjacent magnetic induction switches can also be set to 4 cm or 5 cm.

[0033] In this embodiment, the power supply is the 24V DC power supply inside the machine tool. Of course, in other embodiments, the power supply can also be a 12V or 36V safe DC power supply.

[0034] Of course, in other embodiments, an alarm can also be connected to the emergency stop circuit 4 of the machine tool. Once the magnetic glove 2 approaches the working surface of the machine tool and triggers the array magnetic switch circuit, causing the emergency stop circuit 4 of the machine tool to disconnect, the machine tool processing equipment stops running and the alarm immediately sounds an alarm.

[0035] The safety protection device of this machine tool processing equipment has a simple structure, is easy to install, and has a low cost. It can be applied to the transformation of existing machine tools and can also be used for newly developed machine tools, with broad application prospects.

[0036] The positive pole of the DC24V power supply inside the machine tool 1 reaches the positive pole of the relay K1 coil through the array magnetic induction switches (normally closed) J1~Jn and then returns to the negative pole of the DC24V power supply to form a closed-loop circuit (i.e., the array magnetic switch circuit).

[0037] When the machine tool processing equipment is operating normally, all magnetic induction switches are in the conducting state, the relay K1 is in the attracted state, and the emergency stop circuit 4 of the machine tool is connected in series to a set of normally open contacts of the relay K1. At this time, this set of normally open contacts is in the closed state, that is, the emergency stop circuit 4 of the machine tool is in the normal conducting state.

[0038] When the magnetic glove 2 worn by the operator approaches the processing surface of the machine tool 1 and triggers any normally closed magnetic induction switch of the array magnetic switch 3, the magnetic induction switch is turned off, the relay K1 loses power, and the normally open contacts of the relay K1 are opened, causing the emergency stop circuit 4 of the machine tool to be disconnected, and the machine tool 1 stops working, thus avoiding equipment damage and personal accidents.

[0039] In the description of this specification, the meaning of "a plurality of" is at least two, such as two, three or more, etc., unless otherwise specifically defined.

Claims

1. A safety protection device for machine tool processing equipment, wherein the safety protection device is triggered by a magnetic glove (2) worn by an operator to stop the operation of the machine tool processing equipment, characterized in that: The safety protection device comprises an array magnetic switch circuit and a machine tool emergency stop circuit (4), wherein the array magnetic switch circuit comprises an array magnetic switch (3) and a relay K1, wherein a coil of the relay K1 is connected in series with the array magnetic switch (3) and then connected to a power source to form an array magnetic switch circuit, wherein the array magnetic switch (3) is formed by a plurality of normally closed magnetic induction switches connected in series, and the array magnetic switch (3) is arranged on a working surface of a machine tool (1); a group of normally open points of the relay K1 is connected to the machine tool emergency stop circuit (4); When the magnetic glove (2) triggers the normally closed magnetic induction switch, the array magnetic switch circuit is disconnected, the relay K1 is powered off, the machine tool emergency stop circuit (4) is disconnected synchronously, and the machine tool (1) stops working.

2. A safety protection device for machine tool processing equipment according to claim 1, characterized in that: The plurality of magnetic induction switches are distributed in a linear array, a two-dimensional matrix, a ring, or an irregular distribution.

3. A safety protection device for machine tool processing equipment according to claim 2, characterized in that: The distance between adjacent magnetic induction switches is 3-5 cm.

4. A machine tool processing equipment safety protection device as claimed in claim 2 or 3, characterized in that: The magnetic induction switch is an anti-interference magnetic induction switch.

5. A safety protection device for machine tool processing equipment according to claim 1, characterized in that: The power supply is a 12V, 24V or 36V safe DC power supply.

6. A safety protection device for machine tool processing equipment according to claim 1, characterized in that: The machine tool emergency stop circuit is provided with an alarm.

Images