A piercing penetration sensing device for an electrical discharge piercing machine

Abstract

The utility model provides a kind of piercing penetration induction device of electric spark puncher, including the adjusting support of installation on the machine table of electric spark puncher, ultraviolet light sensor device is fixed on the adjusting support, the ultraviolet light sensor device is located the side of the metal plate body to be perforated and points to its below, when perforating copper pipe passes through the metal plate body to be perforated, ultraviolet light sensor device senses the ultraviolet of the lower part perforation spark of the metal plate body to be perforated, and signal is transmitted to control system, the device is by ultraviolet sensor setting in the side of the metal plate body to be perforated, by the ultraviolet of the ultraviolet light sensor device after inductive electric spark passing through plate body to copper pipe return signal, the inductive wavelength of ultraviolet is between 185~260 nanometers, can induct the weak ultraviolet of electric spark generation, and setting in the side below of metal plate body, water and spark generated after copper pipe perforation cannot influence inductive device, delay service life and reduce misjudgment phenomenon.

Description

Technical Field

[0001] This utility model relates to the field of electrical discharge drilling machine equipment, and in particular to a drilling penetration sensing device for an electrical discharge drilling machine. Background Technology

[0002] An electrical discharge machining (EDM) drilling machine is a special machine tool that uses EDM technology for precision drilling, mainly used to process high-hardness metal materials or complex-shaped micro-holes. For its specific principle, please refer to the applicant's earlier application CN220838314U, "Rotating Clamping Device and Automatic Copper Tube Changing Device for EDM Drilling Machine." In that case, when the copper tube pierces the metal plate, the control circuit receives a signal after the copper tube passes through the metal plate via gravity sensing and water flushing. This signal confirms that drilling is complete, and the circuit board then moves the copper tube upwards for another drilling attempt. However, the gravity sensing and water flushing method has poor sensitivity in practical applications and can lead to misjudgments.

[0003] The electric spark drilling device disclosed in patent publication number CN 217859196 U uses a flame sensor placed below the perforated copper tube. Patent publication number CN 217749741 U discloses a device that uses a spark detector, an infrared sensor, and a brightness sensor or a photosensitive sensor placed below the electrode tube (i.e., the copper tube). In both of these structures, the sensors are placed below the copper tube. However, a large amount of water is discharged after each drilling, and the high temperature will affect the lifespan of the sensor. Furthermore, the sensor often misjudges during the water flushing process, resulting in the hole not being fully penetrated before returning directly, or the hole being penetrated but the copper tube not returning. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model proposes a penetration sensing device for an electrical discharge machining (EDM) machine, comprising:

[0005] The adjustment bracket is installed on the machine base of the EDM machine.

[0006] An ultraviolet light sensor is fixed on the adjustment bracket. The ultraviolet light sensor is located on the side of the metal plate to be perforated and points downwards. When the perforating copper tube passes through the metal plate, the ultraviolet light sensor senses the ultraviolet light emitted by the perforation spark at the bottom of the metal plate and converts the light signal into an electrical signal, which is then transmitted to the control system.

[0007] Preferably, the machine base is provided with a positioning fixture, which is used to fix the metal plate to be perforated.

[0008] Preferably, the ultraviolet light sensing device includes a sensor body and a protective sleeve covering the outside of the sensor body.

[0009] Preferably, the other end of the sensor body is also fitted with an installation sleeve, which is fixedly connected to the adjustment bracket, and the positive and negative poles of the sensor body pass through the installation sleeve and are connected to the circuit control board.

[0010] Preferably, the adjusting bracket includes a fixed base, a first telescopic arm is rotatably connected to the fixed base, a second telescopic arm is movably connected to the other end of the first telescopic arm, a positioning block is movably connected to the other end of the second telescopic arm, and the ultraviolet light sensing device is fixedly connected to the positioning block.

[0011] Preferably, the connection between the fixed base, the first telescopic arm, the second telescopic arm, and the positioning block is locked with screws and is adjustable.

[0012] Preferably, the sensor body is an ultraviolet (UV) sensor, and the detected ultraviolet wavelength is 185nm~260nm.

[0013] The perforation and penetration sensing device for the EDM perforation machine proposed in this utility model has the following beneficial effects: This device places an ultraviolet light sensor on the side of the metal plate to be perforated. It sends an upward signal to the copper tube by sensing the ultraviolet light emitted after the electric spark passes through the plate. The sensing wavelength of the ultraviolet light is between 185 and 260 nanometers, which can sense the weak ultraviolet light generated by the electric spark. Furthermore, since it is placed below the side of the metal plate, the water and sparks generated after the copper tube is perforated will not affect the sensing device, thus extending its service life and reducing the occurrence of false judgments. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0015] Figure 1 This is a three-dimensional structural diagram of the sensing device of this utility model;

[0016] Figure 2 This is an explosion diagram of the sensing device of this utility model;

[0017] Figure 3 This is a schematic diagram of the induction device of this utility model installed on the EDM machine stand;

[0018] Among them, 1. machine base; 2. ultraviolet light sensor; 21. fixed base; 22. first telescopic arm; 23. second telescopic arm; 24. positioning block; 25. screw; 31. protective sleeve; 32. sensor body; 33. mounting sleeve; 4. metal plate to be perforated; 5. positioning fixture. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0020] like Figure 1 As shown, this utility model proposes a penetration sensing device for an electrical discharge machining (EDM) machine, including an adjusting bracket installed on the machine base 1 of the EDM machine. The structure of the machine base 1 can be varied and is not limited to the embodiment shown in the figure. Figure 3 The machine tool 1 shown in the image is equipped with a positioning fixture 5, which is used to fix the metal plate 4 to be perforated. An adjusting bracket is set on the machine tool 1, and an ultraviolet light sensor 2 is set on the adjusting bracket. The ultraviolet light sensor 2 is located on the side of the metal plate 4 to be perforated and points downwards. When the copper wire is passed through the metal plate 4, the ultraviolet light sensor 2 senses the ultraviolet light emitted by the perforation spark at the bottom of the metal plate 4 and converts the light signal into an electrical signal and transmits it to the control system. At this time, the copper wire has been perforated. After receiving the signal, the control system controls the copper wire to be pulled back to perform perforation of the next hole.

[0021] The ultraviolet light sensor 2 is positioned on the machine base 1, ensuring that it is aligned with the copper tube and that its end points towards the bottom of the plate to be perforated. However, it is not positioned below the perforation location, as this can effectively prevent water sprayed from the copper tube during perforation from affecting the sensor.

[0022] To accommodate different products, the adjustment is set to be adjustable up and down as well as forward and backward, which also makes it easier to adjust the optimal sensor position during initial installation. Specifically: Figure 2 As shown, the adjusting bracket includes a fixed base 21, on which a first telescopic arm 22 is rotatably connected. A second telescopic arm 23 is movably connected to the other end of the first telescopic arm 22, and a positioning block 24 is movably connected to the other end of the second telescopic arm 23. The sensor body 32 is fixedly connected to the positioning block 24 via a mounting tube 33. The first telescopic arm 22 and the second telescopic arm 23 can be folded after rotation to adjust their height. Adjusting the angle between the first telescopic arm 22 and the fixed base 21 allows the sensor to be moved closer to or further away from the metal plate 4 to be perforated. The connection between the fixed base 21, the first telescopic arm 22, the second telescopic arm 23, and the positioning block 24 is secured by screws 25 and is adjustable. Loosening the screws 25 allows adjustment of the angle between the fixed base 21, the first telescopic arm 22, the second telescopic arm 23, and the positioning block 24; tightening the screws 25 fixes the angle.

[0023] To ensure that the sensor is not affected by sparks or water, a protective sleeve 31 is installed on the outside of the sensor. After the hole is made, the ultraviolet light from the electric spark will be detected by the sensor along the protective sleeve 31. Since the equipment is generally indoors, the ultraviolet light from sunlight will not be detected indoors. Furthermore, the ultraviolet wavelength detected by the sensor is 185 nanometers to 260 nanometers, which is unresponsive to sunlight and will not cause false detection.

[0024] To better secure the sensor body 32, an installation sleeve 33 is fitted onto the other end of the sensor body 32. The installation sleeve 33 is fixedly connected to the adjustment bracket. The installation sleeve 33 passes through the positioning block 24 on the adjustment bracket and fits perfectly into the hole on the positioning block 24. The positive and negative terminals of the sensor body 32 pass through the installation sleeve 33 and are connected to the circuit control board.

Claims

1. A perforation and penetration sensing device for an electrical discharge machining (EDM) machine, characterized in that, include The adjustment bracket is installed on the machine base of the EDM machine. An ultraviolet light sensor is fixed on the adjustment bracket. The ultraviolet light sensor is located on the side of the metal plate to be perforated and points downwards. When the perforating copper tube passes through the metal plate, the ultraviolet light sensor senses the ultraviolet light emitted by the perforation spark at the bottom of the metal plate. The light signal is converted into an electrical signal and transmitted to the control system.

2. The perforation and penetration sensing device for an EDM drilling machine according to claim 1, characterized in that, The machine base is equipped with a positioning fixture, which is used to fix the metal plate to be perforated.

3. The perforation and penetration sensing device for an EDM drilling machine according to claim 1, characterized in that, The ultraviolet light sensing device includes a sensor body and a protective sleeve covering the outside of the sensor body.

4. The perforation and penetration sensing device for an EDM drilling machine according to claim 3, characterized in that, The other end of the sensor body is also fitted with an installation sleeve, which is fixedly connected to the adjustment bracket. The positive and negative poles of the sensor body pass through the installation sleeve and are connected to the circuit control board.

5. The perforation and penetration sensing device for an EDM drilling machine according to claim 1 or 4, characterized in that, The adjustment bracket includes a fixed base, on which a first telescopic arm is rotatably connected. A second telescopic arm is movably connected to the other end of the first telescopic arm, and a positioning block is movably connected to the other end of the second telescopic arm. The ultraviolet light sensor is fixedly connected to the positioning block.

6. The perforation and penetration sensing device for an EDM drilling machine according to claim 5, characterized in that, The connection between the fixed base, the first telescopic arm, the second telescopic arm, and the positioning block is secured with screws and is adjustable.

7. The perforation and penetration sensing device for an EDM drilling machine according to claim 3, characterized in that, The sensor body is an ultraviolet (UV) sensor, which detects ultraviolet wavelengths of 185nm to 260nm.

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