Laser photoelectric protection device of bending machine

Abstract

The utility model provides a laser photoelectric protection device for a bending machine, which is mounted at two ends of the bending machine through sliding blocks, is used for forming a protection area between an upper moving point and a lower moving point of the bending machine, and comprises a light emitter, a receiver and a single chip microcomputer, the light emitter is used for emitting a pulse light beam, and the receiver is provided with a plurality of photosensitive diodes and is used for receiving the light beam emitted by the pulse; the receiver is electrically connected with the single-chip microcomputer. The device is applied to the machining industry of bending machine equipment or metal plate bending equipment, in a protection area, when a human hand or other objects mistakenly enter a protection range and block light beams, the bending machine stops running, when the objects leave, the light beams are not blocked, the bending machine works normally, and when a cutter reaches a slow-down point, the bending machine protection device stops protection. And the box can be normally bent.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of bending machine equipment, in particular to a bending machine laser photoelectric protection device. BACKGROUND

[0002] The existing light curtain protection device is not high in safety factor because the emitted signal is easily affected by factors such as light. In the bending production process of the bending machine, hand injury accidents caused by improper operation are common. Even if safety production is trained, human-caused accidents are inevitable in production. How to produce safely in the existing production process has become the top priority for equipment manufacturers. SUMMARY

[0003] Technical scheme: in order to solve the above technical problems, the utility model provides a bending machine laser photoelectric protection device, specifically the device is installed at both ends of the bending machine through the sliding block, and is used for forming a protection area between the upper moving point and the slow lower point of the bending machine, wherein the device comprises a light emitter, a receiver and a single-chip microcomputer; the light emitter is used for emitting a pulse light beam, the receiver is provided with a plurality of photosensitive diodes and is used for receiving the pulse emitted light beam; the receiver is electrically connected with the single-chip microcomputer.

[0004] As an improvement, it further comprises two mounting brackets, which are T-shaped detachable structures inverted to one side, each mounting bracket is arranged to be side-slidingly mounted, comprising a horizontal direction one end mounted at the end of the bending machine through the sliding block, and the vertical direction bottom independently mounting the light emitter or the receiver, wherein the light emitter and the receiver are mounted on the same horizontal plane and are oppositely arranged.

[0005] As an improvement, the laser wavelength of the pulse light beam emitted by the light emitter is 635nm.

[0006] As an improvement, the photosensitive diode is provided with three, each is independently electrically connected with the single-chip microcomputer, and three different signal lamps are independently connected correspondingly.

[0007] As an improvement, the cable length of the light emitter is 5-10m, and the cable length of the receiver is 2-6m.

[0008] As an improvement, it further comprises an acrylic panel, which is used for the panel outer assembly plate of the receiver, and the thickness is 1.5-3mm.

[0009] Beneficial effects: the light curtain protection device provided by the utility model is applied to the bending machine equipment, is installed at both ends of the equipment sliding block, a protection area is formed between the upper moving point and the slow lower point of the bending machine, when the hand or other objects of a person mistakenly enter the protection area and shield the light beam, the bending machine stops running, when the objects leave, the light beam is not shielded, the bending machine normally works, when the knife reaches the slow lower point, the bending machine protection device stops protection, and the normal bending and box folding can be carried out. It is mainly applied to the sheet metal bending equipment processing industry. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a structure schematic view of the utility model device.

[0011] Figure 2 It is a structure schematic view of the utility model receiver acrylic panel, a is transparent and non-hollow structure, b is filled black structure, c is box folding state, d is slow lower state, e is shielding state, f is the sign of laser strong light, please do not look directly.

[0012] Figure 3 It is a working principle schematic view of the utility model light curtain protection device.

[0013] In the drawing: bending machine 1, mounting bracket 2, light emitter 3, receiver 4, photosensitive diode 5. DETAILED DESCRIPTION

[0014] The specific embodiment of the utility model will be described in further detail in combination with the embodiments. The following embodiments are used to illustrate the utility model, but not to limit the scope of the utility model.

[0015] See Figure 1 As shown in the drawing, the bending machine laser photoelectric protection device includes a light emitter, a receiver and a single-chip microcomputer; the light emitter 3 is used to emit a pulse light beam, the receiver 4 is provided with a plurality of photosensitive diodes and is used to receive the pulse emitted light beam; the receiver 4 is electrically connected with the single-chip microcomputer.

[0016] It also includes two mounting brackets 2, which are T-shaped detachable structures inverted to one side, each mounting bracket is provided with side sliding installation, including the end in horizontal direction is installed at the end of the bending machine 1 through the sliding block, the bottom in vertical direction is independently installed the light emitter 3 or the receiver 4, wherein the light emitter 3 and the receiver 4 are installed at the same horizontal plane and are oppositely arranged.

[0017] The light curtain protection device in this invention uses a 635-nanometer laser wavelength layer as the emitter, which emits a frequency-controlled signal to eliminate the influence of light on the signal, forming a high-safety-factor protection zone. When a person or other object accidentally enters the protection zone and blocks the light beam, the bending machine stops operating, maximizing safety in production and reducing the occurrence of production accidents. This adds an extra layer of safety to the traditional bending process.

[0018] See Figure 3 As shown, the working principle of this utility model is as follows: the emitter 3 of the light curtain protection device emits a pulsed beam of light, and the receiver has three photodiodes 5 that receive the laser emission signal. The microcontroller then outputs a command signal. After receiving the signal, in order to prevent the photoresistor from being affected by factors such as sunlight, the laser emits a band-type signal using a 635 nanometer wave band frequency. The signal given by the diode receiver is also band-type, which can effectively eliminate interference from the 635 nanometer wave band of light.

[0019] LED 3 is a high-frequency pulse transmitter, and receiver 4 is also a high-frequency receiver; the LEDs and receiver need to be frequency-matched. After frequency matching, the signal is output to the microcontroller. The microcontroller receives the signals from three indicator lights, E1, E2, and E3, and programs them to form different modes. When indicator lights E1 and E2 are lit and E3 is blocked, the system is operational. When all three indicator lights are blocked, the system enters a shielded mode, outputting a PNP NC signal directly to the system to halt operation.

[0020] When the equipment is operating, the slider descends. If a person or object blocks the beam, the cutter stops. The equipment can stop even when a person or object is not necessarily below the cutter edge, provided the equipment is facing forward. When the first indicator light (E1) is blocked, the system issues a command to stop the cutter. When the second indicator light (E2) is blocked, the equipment must stop. Indicator lights E2 and E3 provide a lead time for the equipment to stop, ensuring safe production.

[0021] In another specific embodiment of this utility model, the mounting bracket 2 of the light curtain protection device is a novel side-sliding installation, preferably using a cable with a light emitter length of 5~10m, especially 8 meters, and a receiver cable length of 2~6m, especially 4 meters. A controller for the bending machine protection device is also included (required for some bending machines). The process involves selecting a suitable beam distance based on the bending machine table width, determining the bending machine's up / down movement, the installation location dimensions, selecting a single-point / three-point mounting bracket, determining whether cable lengthening is needed, and selecting the appropriate controller.

[0022] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A laser photoelectric protection device for a bending machine, characterized by: The device is installed at both ends of the bending machine through a sliding block to form a protection area between the upper moving point and the slow lower point of the bending machine, wherein the device comprises a light emitter, a receiver and a single-chip microcomputer; the light emitter is used to emit a pulse light beam; the receiver is provided with a plurality of photosensitive diodes for receiving the pulse emitted light beam; and the receiver is electrically connected with the single-chip microcomputer.

2. The laser photoelectric protection device for bending machine according to claim 1, characterized in that: Two mounting brackets are further included, each being a T-shaped detachable structure inverted to one side, each mounting bracket being provided as a side sliding installation, comprising a horizontal direction one end installed at the end of the bending machine through a sliding block, and a vertical direction bottom independently installed with the light emitter or the receiver, wherein the light emitter and the receiver are installed at the same horizontal plane and oppositely arranged.

3. The laser photoelectric protection device for bending machine according to claim 1, characterized in that: The laser wavelength of the pulse light beam emitted by the light emitter is 635 nm.

4. The laser photoelectric protection device for bending machine according to claim 1, characterized in that: The photosensitive diodes are provided with three, each independently electrically connected with the single-chip microcomputer, and correspondingly independently connected with three different signal lights.

5. The laser photoelectric protection device for bending machine according to claim 1, characterized in that: The cable length of the light emitter is 5-10 m, and the cable length of the receiver is 2-6 m.

6. The laser photoelectric protection device for bending machine according to claim 1, characterized in that: An acrylic panel is further included for the panel outer assembly plate of the receiver, with a thickness of 1.5-3 mm.

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