Workpiece clamping device of electric spark micro-hole machining machine tool

Abstract

The utility model belongs to the field of electric spark micropore processing machine tools, and particularly relates to a workpiece clamping device of an electric spark micropore processing machine tool, which comprises a mounting plate, a first positioning plate and a second positioning plate symmetrically arranged on two sides of the upper surface of the mounting plate, a controller fixedly connected to the bottom of the mounting plate, and a fixing mechanism arranged at the bottom of the mounting plate. Self-adjusting mechanisms are arranged on the front surface and the rear surface of the mounting plate; by arranging the fixing mechanism, during fixing, air in an inner cavity of a hollow box and an inner cavity of a communicating pipe can be pumped out under connection of a pressure pumping pipe by opening a pressure pumping pump, negative pressure is formed in the inner cavity, and then fixing of a workpiece is completed; by means of the device, outside air can enter the hollow box, at the moment, the workpiece can be taken down from the mounting plate, the production cost can be effectively reduced, meanwhile, operation is easy, and the workpiece cannot be damaged.

Description

Technical Field

[0001] The utility model relates to the field of electric discharge machining machine tools for micro holes, in particular to a workpiece clamping device for an electric discharge machining machine tool for micro holes. Background Technique

[0002] An electric discharge machining machine tool for micro holes is a special machine tool dedicated to machining micro holes. The electric discharge machining machine tool for micro holes uses the principle of electric discharge machining. During the machining process, the machine tool generates electric discharges between the tool and the workpiece through a high-frequency pulse power supply, and uses the high temperature and high pressure effects of the spark discharges to remove materials, thereby realizing the machining of micro holes. The numerically controlled electric discharge machining machine for micro holes is mainly used for machining various workpieces that require high-precision and high-surface-finish micro holes.

[0003] Currently, when an electric discharge machining machine tool for micro holes fixes a planar workpiece, a fixture is generally used for fixing it. However, the fixture usually needs to be customized and designed to meet the requirements of different workpiece sizes and shapes. This customized design and manufacturing process results in a relatively high cost of the fixture. For small-batch production or single-piece production, the high cost of the fixture may significantly increase the production cost. In addition, the installation, adjustment, and disassembly of the fixture also require certain techniques and experience. The complex use may lead to low operating efficiency and even damage to the workpiece or the fixture due to improper operation. Therefore, a workpiece clamping device for an electric discharge machining machine tool for micro holes is proposed for the above problems. Content of the Utility Model

[0004] In order to make up for the deficiencies of the prior art, that is, the high cost of the fixture and the problem that it is cumbersome to use and easily damages the workpiece, the utility model proposes a workpiece clamping device for an electric discharge machining machine tool for micro holes.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a workpiece clamping device for an electric discharge machining machine tool for micro holes, including a mounting plate. On both sides of the upper surface of the mounting plate, a first positioning plate and a second positioning plate are symmetrically arranged. A controller is fixedly connected to the bottom of the mounting plate. A fixing mechanism is arranged at the bottom of the mounting plate. Self-adjusting mechanisms are arranged on both the front surface and the rear surface of the mounting plate.

[0006] The fixing mechanism includes a through groove. The through groove is opened in the middle of the upper surface of the mounting plate. A communicating pipe is fixedly sleeved in the inner cavity of the through groove. A hollow box is fixedly connected to the bottom of the mounting plate. The bottom end of the communicating pipe penetrates into the inside of the hollow box. A pressure stabilizing pipe and a pumping and pressing pipe are respectively fixedly connected to both sides of the hollow box. One end of the pumping and pressing pipe is fixedly connected to a pumping and pressing pump. A pressure sensor is fixedly installed on the inner wall of the hollow box.

[0007] Preferably, the self - adjusting mechanism includes two rectangular grooves which are respectively formed on the front surface and the rear surface of the mounting plate. Springs are fixedly connected to both ends of the inner cavity of each rectangular groove. Two sliding blocks are movably sleeved in the inner cavity of each rectangular groove. One end of each spring is connected to one side of the corresponding sliding block. The two sliding blocks are respectively connected to the first positioning plate and the second positioning plate.

[0008] Preferably, the suction - pressure pump is fixedly installed at the bottom of the mounting plate, and the hollow box, the pressure - stabilizing pipe and the suction - pressure pipe are interconnected.

[0009] Preferably, a mounting groove is formed on the upper surface of the mounting plate. The mounting groove and the through - groove are interconnected. A protective net is arranged in the inner cavity of the mounting groove.

[0010] Preferably, a bolt is threadedly sleeved on the top of the protective net. The bottom of the bolt penetrates through the outer side of the bottom end of the protective net and extends into the interior of the mounting plate.

[0011] Preferably, the pressure - stabilizing pipe is composed of a first connecting pipe and a second connecting pipe. A first one - way valve is fixedly installed at the connection part of the first connecting pipe and the second connecting pipe. The suction - pressure pipe is composed of a third connecting pipe and a fourth connecting pipe. A second one - way valve is fixedly installed at the connection part of the third connecting pipe and the fourth connecting pipe. One ends of the second connecting pipe and the third connecting pipe are respectively connected to both sides of the hollow box.

[0012] Preferably, handles are fixedly connected to one side of both the first positioning plate and the second positioning plate. A protective sleeve is fixedly sleeved on the outer side of each handle.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. By setting the fixing mechanism, when fixing, the suction - pressure pump is turned on. Under the connection of the suction - pressure pipe, the air in the inner cavities of the hollow box and the connecting pipe can be pumped out, making the inside form a negative pressure, thus completing the fixing of the workpiece. When disassembly is required, under the action of the pressure - stabilizing pipe, the outside air can enter the interior of the hollow box, and at this time, the workpiece can be taken off from the mounting plate. Using this device can effectively reduce production costs, and at the same time, the operation is simple and the workpiece will not be damaged.

[0015] 2. When the self - adjusting mechanism is provided in the utility model to automatically adjust the position of the workpiece, the workpiece is placed inside the first positioning plate and the second positioning plate. At this time, the two springs contract to different degrees. Then, under the action of the spring return force, the position of the workpiece can be adjusted until the contraction lengths of the two springs are the same. At this time, the automatic adjustment of the workpiece position is completed. By adjusting the position of the workpiece, the center of the workpiece can be located at the position of the fixing mechanism, so as to ensure the stability of the fixing mechanism during fixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following - described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 is the overall structural schematic diagram of the present utility model;

[0018] Figure 2 is the bottom - view structural schematic diagram of the present utility model;

[0019] Figure 3 is the front - view sectional structural schematic diagram of the present utility model;

[0020] Figure 4 is of the present utility model Figure 3 structural schematic diagram at position A.

[0021] In the figure: 1, mounting plate; 2, first positioning plate; 3, second positioning plate; 4, controller; 5, fixing mechanism; 501, through - groove; 502, connecting pipe; 503, hollow box; 504, voltage - stabilizing tube; 505, pumping and pressing pipe; 506, pumping and pressing pump; 507, mounting groove; 508, protective net; 509, bolt; 510, air - pressure sensor; 511, first connecting pipe; 512, second connecting pipe; 513, first check valve; 514, third connecting pipe; 515, fourth connecting pipe; 516, second check valve; 6, handle; 7, self - adjusting mechanism; 701, rectangular groove; 702, spring; 703, sliding block; 8, protective sleeve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] 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. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0023] The following will further elaborate on this application Figures 1-4 in more detail.

[0024] An embodiment of this application discloses a workpiece clamping device for an electric discharge micro-hole machining machine tool. Referring to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , a workpiece clamping device for an electric discharge micro-hole machining machine tool includes a mounting plate 1. On both sides of the upper surface of the mounting plate 1, a first positioning plate 2 and a second positioning plate 3 are symmetrically arranged. A controller 4 is fixedly connected to the bottom of the mounting plate 1. A fixing mechanism 5 is arranged at the bottom of the mounting plate 1. Self-adjusting mechanisms 7 are arranged on both the front surface and the rear surface of the mounting plate 1. By setting the fixing mechanism 5, rapid fixation of the workpiece can be achieved. By setting the self-adjusting mechanism 7, the position of the workpiece can be automatically adjusted, thereby ensuring the stability of the fixing mechanism 5 during fixation.

[0025] The fixing mechanism 5 includes a through groove 501. The through groove 501 is opened in the middle of the upper surface of the mounting plate 1. A communicating pipe 502 is fixedly sleeved in the inner cavity of the through groove 501. A hollow box 503 is fixedly connected to the bottom of the mounting plate 1. The bottom end of the communicating pipe 502 penetrates into the inside of the hollow box 503. A pressure stabilizing pipe 504 and a pumping and pressing pipe 505 are respectively fixedly connected to both sides of the hollow box 503. One end of the pumping and pressing pipe 505 is fixedly connected to a pumping and pressing pump 506. A pressure sensor 510 is fixedly installed on the inner wall of the hollow box 503. The pumping and pressing pump 506 is fixedly installed at the bottom of the mounting plate 1. The hollow box 503, the pressure stabilizing pipe 504 and the pumping and pressing pipe 505 communicate with each other. When fixing the workpiece, the workpiece is placed on the mounting plate 1. At this time, the workpiece seals the top end of the through groove 501. By turning on the pumping and pressing pump 506, under the connection of the pumping and pressing pipe 505, the air in the inner cavities of the hollow box 503 and the communicating pipe 502 can be pumped out, making the inside form a negative pressure, and thus completing the fixation of the workpiece. When disassembly is required, under the action of the pressure stabilizing pipe 504, the outside air can enter the inside of the hollow box 503, and at this time, the workpiece can be removed from the mounting plate 1.

[0026] Referring to Figure 1, the self-adjusting mechanism 7 includes two rectangular grooves 701 which are respectively opened on the front surface and the rear surface of the mounting plate 1. At both ends of the inner cavity of the rectangular groove 701, springs 702 are fixedly connected. Two sliding blocks 703 are movably sleeved in the inner cavity of the rectangular groove 701. One end of the spring 702 is connected to one side of the sliding block 703. The two sliding blocks 703 are respectively connected to the first positioning plate 2 and the second positioning plate 3. When automatically adjusting the position of the workpiece, the workpiece is placed inside the first positioning plate 2 and the second positioning plate 3. At this time, the two springs 702 are contracted to different degrees. At this time, under the action of the restoring force of the springs 702, the position of the workpiece can be adjusted until the contraction lengths of the two springs 702 are the same. At this time, the automatic adjustment of the position of the workpiece is completed. By adjusting the position of the workpiece, the center of the workpiece can be located at the position of the fixing mechanism 5, so as to ensure the stability of the fixing mechanism 5 during fixing.

[0027] Refer to Figure 4 , an installation groove 507 is opened on the upper surface of the mounting plate 1. The installation groove 507 and the through groove 501 communicate with each other. A protective net 508 is arranged in the inner cavity of the installation groove 507. By arranging the protective net 508, a protective effect can be achieved to prevent impurities from entering the hollow box 503 through the connecting pipe 502. By arranging the installation groove 507, the protective net 508 can be installed to prevent the protective net 508 from protruding and affecting the fixing of the workpiece. The top of the protective net 508 is threadedly sleeved with a bolt 509. The bottom of the bolt 509 penetrates through the outer side of the bottom end of the protective net 508 and extends into the mounting plate 1. By arranging the bolt 509, it is convenient to fix or disassemble the protective net 508.

[0028] Refer to Figure 3 , the voltage stabilizing tube 504 is composed of a first connecting pipe 511 and a second connecting pipe 512. A first one-way valve 513 is fixedly installed at the connection part of the first connecting pipe 511 and the second connecting pipe 512. The pressure extraction pipe 505 is composed of a third connecting pipe 514 and a fourth connecting pipe 515. A second one-way valve 516 is fixedly installed at the connection part of the third connecting pipe 514 and the fourth connecting pipe 515. One ends of the second connecting pipe 512 and the third connecting pipe 514 are respectively connected to both sides of the hollow box 503. By arranging the first one-way valve 513, during pressure extraction, the first one-way valve 513 can be closed to prevent the air pressure in the hollow box 503 from changing. By arranging the second one-way valve 516, during the process of fixing the workpiece after pressure extraction, the second one-way valve 516 can be closed to maintain the fixing of the workpiece.

[0029] Refer to Figure 4, on one side of the first positioning plate 2 and the second positioning plate 3, a handle 6 is fixedly connected. A protective sleeve 8 is fixedly sleeved on the outer side of the handle 6. By providing the handle 6, it is convenient to pull the first positioning plate 2 and the second positioning plate 3 outwards. By providing the protective sleeve 8, a protective effect can be achieved.

[0030] Working principle: When fixing a workpiece, first pull the first positioning plate 2 and the second positioning plate 3 outwards through the handle 6, and then place the workpiece inside the first positioning plate 2 and the second positioning plate 3. At this time, under the action of the restoring force of the spring 702, the position of the workpiece can be adjusted until the contraction lengths of the two springs 702 are the same. At this time, the automatic adjustment of the position of the workpiece is completed. At this time, the workpiece covers the opening at the top of the through groove 501. When using the fixing mechanism 5 to fix the workpiece, first close the first one-way valve 513 and open the second one-way valve 516. Under the connection of the suction and pressure pipe 505, the air in the inner cavities of the hollow box 503 and the communication pipe 502 can be pumped out to form a negative pressure inside. When the pressure reaches a certain value, the suction and pressure pump 506 and the second one-way valve 516 are automatically closed by the air pressure sensor 510. At this time, the fixing of the workpiece is completed. When it is necessary to disassemble the workpiece, the first one-way valve 513 is opened through the controller 4. At this time, the outside air enters the hollow box 503 through the first connecting pipe 511 and the second connecting pipe 512, and then the first positioning plate 2 and the second positioning plate 3 are pulled outwards to complete the disassembly of the workpiece.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A workpiece clamping device for an electric discharge micro-hole machining machine tool, characterized in that: It includes a mounting plate (1), on both sides of the upper surface of the mounting plate (1), a first positioning plate (2) and a second positioning plate (3) are symmetrically arranged. A controller (4) is fixedly connected to the bottom of the mounting plate (1). A fixing mechanism (5) is arranged at the bottom of the mounting plate (1). Self-adjusting mechanisms (7) are arranged on both the front surface and the rear surface of the mounting plate (1). The fixing mechanism (5) includes a through groove (501), the through groove (501) is opened in the middle of the upper surface of the mounting plate (1). A communicating pipe (502) is fixedly sleeved in the inner cavity of the through groove (501). A hollow box (503) is fixedly connected to the bottom of the mounting plate (1). The bottom end of the communicating pipe (502) penetrates into the inside of the hollow box (503). A pressure stabilizing pipe (504) and a pumping and pressing pipe (505) are respectively fixedly connected to both sides of the hollow box (503). One end of the pumping and pressing pipe (505) is fixedly connected to a pumping and pressing pump (506). A pressure sensor (510) is fixedly installed on the inner wall of the hollow box (503).

2. The workpiece clamping device of an electric discharge micro-hole machining machine tool according to claim 1, characterized in that: The self-adjusting mechanism (7) includes two rectangular grooves (701), the two rectangular grooves (701) are respectively opened on the front surface and the rear surface of the mounting plate (1). Springs (702) are fixedly connected to both ends of the inner cavity of the rectangular groove (701). Two sliding blocks (703) are movably sleeved in the inner cavity of the rectangular groove (701). One end of the spring (702) is connected to one side of the sliding block (703). The two sliding blocks (703) are respectively connected to the first positioning plate (2) and the second positioning plate (3).

3. The workpiece clamping device of an electric discharge micro-hole machining machine tool according to claim 1, characterized in that: The pumping and pressing pump (506) is fixedly installed at the bottom of the mounting plate (1). The hollow box (503), the pressure stabilizing pipe (504) and the pumping and pressing pipe (505) communicate with each other.

4. The workpiece clamping device of an electric discharge micro-hole machining machine tool according to claim 1, characterized in that: An installation groove (507) is opened on the upper surface of the mounting plate (1), and the installation groove (507) communicates with the through groove (501). A protective net (508) is arranged in the inner cavity of the installation groove (507).

5. The workpiece clamping device of an electric discharge micro-hole machining machine tool according to claim 4, characterized in that: The top of the protective net (508) is threadedly sleeved with a bolt (509), and the bottom of the bolt (509) penetrates through the outer side of the bottom end of the protective net (508) and extends into the inside of the mounting plate (1).

6. The workpiece clamping device of an electric discharge micro-hole machining machine tool according to claim 1, characterized in that: The pressure stabilizing pipe (504) is composed of a first connecting pipe (511) and a second connecting pipe (512). A first one-way valve (513) is fixedly installed at the connection of the first connecting pipe (511) and the second connecting pipe (512). The pumping and pressing pipe (505) is composed of a third connecting pipe (514) and a fourth connecting pipe (515). A second one-way valve (516) is fixedly installed at the connection of the third connecting pipe (514) and the fourth connecting pipe (515). One ends of the second connecting pipe (512) and the third connecting pipe (514) are respectively connected to both sides of the hollow box (503).

7. The workpiece clamping device of an electric discharge micro-hole machining machine tool according to claim 1, characterized in that: One side of the first positioning plate (2) and the second positioning plate (3) is fixedly connected with a handle (6), and a protective sleeve (8) is fixedly sleeved outside the handle (6).

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