Copper pipe penetration induction short circuit prevention device of spark erosion drilling machine

Abstract

The utility model provides a copper pipe penetration induction short circuit prevention device of a spark erosion drilling machine, which is positioned at the lower part of a workpiece to be processed and comprises a pipe body movably connected to a stand column of a machine table, the pipe body is connected with an auxiliary slag discharge device, the auxiliary slag discharge device comprises a frame body, the frame body is rotatably connected with a turning plate, and the turning plate is connected with the pipe body. A turning plate is arranged on the frame body, a balancing weight is fixed on the turning plate, the balancing weight is eccentrically arranged, a stop block is arranged on the turning plate, and the stop block protrudes out of the frame body and is pressed on the lower surface of a workpiece to be machined; according to the device, the turning plate, the balancing weight and the stop block are arranged at the bottom of the to-be-machined part, when a copper pipe penetrates through the to-be-machined part for the first time, the end of the copper pipe can press the stop block, water in the copper pipe is limited to flow out, pressure maintaining is achieved, and after the turning plate is pushed to rotate and the balancing weight makes contact with a signal line, a copper wire returning signal is given out through the host; according to the scheme, the problems that the copper pipe cannot completely penetrate through the workpiece in the perforating process and whether the workpiece is completely penetrated or not is automatically detected after penetrating through the workpiece are solved.

Description

Technical Field

[0001] The utility model relates to the field of electric spark punching equipment, in particular to a copper tube penetration induction short-circuit prevention device of an electric spark punching machine. Background Art

[0002] Unlike wire-cut EDM machines and forming machines, the EDM perforator uses a hollow copper tube as the electrode for the electric pulse. High-pressure water flows through the small hole in the center of the copper tube, providing cooling and chip removal. Because the discharge between the electrode and the metal generates high-temperature corrosion to achieve the purpose of perforation, it is widely used in precision mold processing. However, during the processing, the copper tube is continuously consumed. When the length of the copper tube cannot meet the processing requirements, it needs to be replaced. EDM perforators generally have a copper tube replacement device, such as CN 116967547. A disclosed rotary clamping device and an automatic copper tube changing device for an electrospark punching machine, as well as a copper tube blanking and tube-piercing device for an electrospark punching machine and an electrospark punching machine disclosed in CN221185002U, both disclose how to change copper tubes. During the punching process, high-pressure water is continuously injected into the copper tube to remove carbon slag generated by the copper tube during the punching process. However, during the actual punching process, when the copper tube just penetrates the workpiece (the hole is not yet fully formed), the water in the copper tube will be discharged along the copper tube, and the water pressure will be relieved, and the water discharge will stop, while the actual workpiece is still not processed. When the copper tube continues to be processed, carbon slag will be generated, resulting in a short circuit and the copper tube will retreat, resulting in low work efficiency. Utility Model Content

[0003] In order to solve the above technical problems, the utility model proposes a copper tube penetration induction anti-short circuit device for an electric spark perforator, which is located at the lower part of the workpiece to be processed and includes a tube body movably connected to the machine column, the tube body is connected to an auxiliary slag discharge device, the auxiliary slag discharge device includes a frame, a flip plate is rotatably connected to the frame, a counterweight is fixed on the flip plate, the counterweight is eccentrically arranged, and a blocking block is provided on the flip plate, the blocking block protrudes from the frame and presses on the lower surface of the workpiece to be processed;

[0004] The frame is a conductor, and a signal line is provided at one end;

[0005] After passing through the workpiece, the copper tube is pressed on the blocking block and pushes the flip plate and the counterweight block to rotate, and the counterweight block contacts the signal line.

[0006] Preferably, the tube body is connected to the machine column via a transverse movement device, and the transverse movement device includes a horizontally arranged double-headed cylinder, the output ends of the double-headed cylinder are respectively fixed to connecting plates, and the tube body is fixed to the connecting plates.

[0007] Preferably, the frame body includes a frame-shaped structure, the frame-shaped structure is provided with a hanging ear, and the flip plate is connected to the hanging ear via a rotating shaft.

[0008] Preferably, the counterweight block is a columnar structure, and the flip plate is eccentrically connected to the end surface of the counterweight block.

[0009] Preferably, an insulating material is provided on one side of the frame end close to the counterweight, and the signal line is provided on the insulating material.

[0010] Preferably, the auxiliary slag discharge device includes a water spray block, the water spray block is provided with a water spray port, and the water spray port is connected to the pipe body.

[0011] The copper tube penetration sensing and anti-short-circuit device of the electric spark punching machine proposed by the utility model has the following beneficial effects: the device is equipped with a flip plate, a counterweight block and a blocking block at the bottom of the workpiece to be processed. When the copper tube passes through the workpiece for the first time, the end of the copper tube will be pressed on the blocking block to limit the outflow of water in the copper tube to achieve pressure maintenance until the flip plate is pushed to rotate and the counterweight block contacts the signal line, and the copper wire retraction signal is given by the main machine. This solution solves the problem that the copper tube cannot completely penetrate the workpiece during punching processing and automatically detects whether the workpiece is completely penetrated after penetrating the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments.

[0013] Figure 1 This is a schematic diagram of the three-dimensional structure of the auxiliary slag discharge device of Example 1 of the present utility model;

[0014] Figure 2 This is a schematic diagram of the three-dimensional structure of the auxiliary slag discharge device of Example 1 of the present utility model;

[0015] Figure 3 This is an exploded view of Example 1 of the present utility model;

[0016] Figure 4 This is a schematic diagram of embodiment 1 of the present invention installed on a machine platform;

[0017] Figure 5 This is an exploded view of Example 2 of the present utility model;

[0018] Figure 6 This is a schematic diagram of embodiment 2 of the present invention installed on a machine platform;

[0019] Among them, 1. workpiece to be processed; 2. pipe body; 3. machine column; 4. auxiliary slag discharge device; 5. frame; 6. counterweight block; 7. blocking block; 8. signal line; 9. flip plate; 10. transverse movement device; 11. connecting plate; 12. hanging ear; 13. water spray block; 14. water spray outlet; 15. positive electrode; 16. negative electrode. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0021] Example 1

[0022] like Figure 1 、 Figure 2 、 Figure 4 As shown, the utility model proposes a copper tube penetration induction anti-short-circuit device for an electric spark punching machine, which is located at the lower part of the workpiece 1 to be processed, and includes a tube body 2 movably connected to the machine column 3, and the tube body 2 can adjust its direction in the horizontal direction, specifically by arranging a transverse movement device 10 on the machine column 3, and the transverse movement device 10 includes a horizontally arranged double-headed cylinder, and the output ends of the double-headed cylinder are respectively fixed with connecting plates 11, and the tube body 2 is fixed on the connecting plate 11. The double-headed cylinder can control the movement of the tube body 2 in the lateral position, thereby adjusting the position of the alignment.

[0023] The pipe body 2 is connected to an auxiliary slag discharge device 4. In this embodiment, Figure 1 、 Figure 2 、 Figure 3 As shown, the auxiliary slag discharge device 4 includes a frame 5, and a flip plate 9 is rotatably connected to the frame 5. The frame 5 is a frame-shaped structure, and a pair of hanging ears 12 are provided at the lower part of the frame-shaped structure. The flip plate 9 is connected to the hanging ears 12 by a rotating shaft, and a fixed block is also provided at the end of the flip plate 9 for connecting with the counterweight 6. The counterweight 6 can be set to be cylindrical, and the two circular end faces are connected to the flip plate 9 and are eccentrically fixed on the counterweight 6. Of course, the shape of the counterweight 6 is not limited, and it can be other forms. The eccentric setting can ensure that the heavier end of the counterweight 6 remains at the bottom, ensuring that the flip plate 9 is normally in a raised horizontal state, and a blocking block 7 is provided on the flip plate 9. The blocking block 7 protrudes from the frame 5 and presses on the lower surface of the workpiece 1 to be processed. 5 is provided with a signal line 8 at the end, and the end of the frame 5 close to the counterweight 6 is provided with an insulating material, and the signal line 8 is arranged on the insulating material. The entire frame 5 is a conductor, and the end of the frame 5 away from the counterweight 6 can be connected to the positive pole, and the signal line 8 is connected to the negative pole. During operation, when the copper tube is wire-cut through the workpiece 1 to be processed, it will be pressed on the blocking block 7. At this time, the water in the copper tube is blocked on the blocking block 7, and the internal water will not release pressure, but will achieve a pressure-maintaining state. The flushing continues, and the copper wire can continue to descend, ensuring that the carbon residue in the copper wire is completely removed. When the copper wire descends until the flip plate 9 rotates, and because the counterweight 6 is eccentrically set, the protruding part of the counterweight 6 contacts the signal line 8 to achieve conduction, giving a signal to the host to control the return of the copper tube. The control system of the host is existing technology, and its control principle will not be repeated in this embodiment.

[0024] Example 2

[0025] This embodiment proposes a copper tube penetration induction anti-short circuit device for an electric spark punching machine, which is the same as that in embodiment 1 and is also located at the lower part of the workpiece 1 to be processed. Figure 5 、 Figure 6 As shown, it includes a tube body 2 movably connected to the machine column 3. The tube body 2 can adjust its direction in the horizontal direction. Specifically, a transverse movement device 10 is set on the machine column 3. The transverse movement device 10 includes a horizontally arranged double-headed cylinder. The output ends of the double-headed cylinder are respectively fixed to a connecting plate 11. The tube body 2 is fixed to the connecting plate 11. The double-headed cylinder can control the movement of the tube body 2 in the lateral position, thereby adjusting the alignment position. In this embodiment, the end of the tube body 2 is connected to the water pump. The auxiliary slag discharge device 4 includes a water spray block 13. The water spray block 13 is provided with a water spray port 14. The water spray port 14 is connected to the tube body 2. By pumping water into the tube body 2 and the water spray block continuously spraying water upward, water can be continuously sprayed to the end of the copper tube, which can assist in removing carbon slag in the copper tube and ensure that the copper tube does not short-circuit and continues to be perforated.

[0026] In this embodiment, the water spray block is a conductor, the water spray block can be connected to the positive pole, and the copper wire is connected to the negative pole. When it continues to move downward and touches the water spray block, it is conductive, giving a signal to the host to control the return of the copper tube.

Claims

1. A copper tube penetration induction short-circuit prevention device for an electric spark punching machine, located at the lower part of a workpiece (1) to be processed, characterized in that: The machine comprises a tube body (2) movably connected to a machine column (3), an auxiliary slag discharge device (4) being connected to the tube body (2), the auxiliary slag discharge device (4) comprising a frame (5), a flip plate (9) being rotatably connected to the frame (5), a counterweight (6) being fixed to the flip plate (9), the counterweight (6) being eccentrically arranged, a blocking block (7) being provided on the flip plate (9), the blocking block (7) protruding from the frame (5) and pressing on the lower surface of the workpiece (1) to be processed; The frame (5) is a conductor, and a signal line (8) is provided at one end; After passing through the workpiece, the copper tube is pressed on the blocking block (7) and pushes the flip plate (9) and the counterweight block (6) to rotate, and the counterweight block (6) contacts the signal line (8).

2. The copper tube penetration induction short-circuit prevention device of the electric spark punching machine according to claim 1, characterized in that: The pipe body (2) is connected to the machine column (3) via a transverse movement device (10). The transverse movement device (10) comprises a horizontally arranged double-headed cylinder, the output ends of which are respectively fixed on connecting plates (11), and the pipe body (2) is fixed on the connecting plates (11).

3. The copper tube penetration induction short-circuit prevention device of the electric spark punching machine according to claim 1, characterized in that: The frame (5) comprises a frame-shaped structure, a hanging ear (12) is provided on the frame-shaped structure, and the flip plate (9) is connected to the hanging ear (12) via a rotating shaft.

4. The copper tube penetration induction short-circuit prevention device of the electric spark punching machine according to claim 3, characterized in that: The counterweight (6) is a columnar structure, and the flip plate (9) is eccentrically connected to the end surface of the counterweight (6).

5. The copper tube penetration induction short-circuit prevention device of the electric spark punching machine according to claim 1, characterized in that: An end of the frame (5) close to the counterweight (6) is provided with an insulating material, and a signal line (8) is provided on the insulating material.

6. The copper tube penetration induction short-circuit prevention device of the electric spark punching machine according to claim 1, characterized in that: The auxiliary slag discharge device (4) comprises a water spray block (13), the water spray block (13) is provided with a water spray port (14), and the water spray port (14) is communicated with the pipe body (2).

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