Electric spark small hole machining machine tool

Abstract

The invention discloses an electric spark small hole machining machine tool, and relates to the field of electric spark machining. The device comprises a machining platform, a copper tungsten wire supporting mechanism is arranged on the machining platform, the copper tungsten wire supporting mechanism comprises a fixed guide block, a workpiece supporting piece, a transparent protection arc plate, a sliding column and a movable copper tungsten wire supporting block, a horn-shaped penetrating hole is formed in the fixed guide block, and the workpiece supporting piece is installed at the bottom of the fixed guide block; the transparent protection arc plate is rotationally connected to the fixed guide block, the sliding column is fixedly connected to the top end of the fixed guide block, and the movable copper tungsten wire supporting block is slidably connected to the sliding column. According to the device, by arranging the arc-shaped transparent plate, mistaken touch or safety problems are prevented, meanwhile, dust is blocked for the electrode wire, electrode wire damage caused by too large vibration amplitude is prevented, in addition, the collecting tank is arranged to be used for collecting insulating liquid on the top and transferring the insulating liquid downwards to the bottom end for machining, and dust is prevented from contaminating the electrode wire.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical discharge machining, and particularly to an electrical discharge machining machine tool for small holes. Background Art

[0002] An electrical discharge machining machine tool for small holes is a special machine tool based on the principle of electrical discharge machining, which is specifically used for machining micro-holes on conductive materials, and is particularly suitable for the precision drilling requirements of high-hardness, high-toughness or complex alloy materials. The core working principle of the electrical discharge machining machine tool for small holes is to generate high-frequency discharges between the electrode wire and the workpiece through a pulse power supply, melt the material using instantaneous high temperature, and wash away the erosion products by the working fluid.

[0003] Since the electrode wire will be worn during use, generally a relatively long section of the electrode wire will be set for use, and the electrode wire is installed in the feeding device. When the electrode wire is worn, the electrode wire will be moved downward by the feeding device and then reattached to the workpiece for machining. However, due to the relatively long electrode wire, a relatively long exposed circuit is formed after being energized, which easily causes safety problems. At the same time, the electrode wire will generate a certain vibration during machining. After the vibration acts on the long electrode wire, the vibration will gradually become larger and damage the electrode wire. In addition, during machining, the electrode wire is prone to cause the machining position of the machining hole to shift due to the inclination of the workpiece, resulting in machining failure. In view of the above situations, the present invention provides an electrical discharge machining machine tool for small holes to solve the above problems. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides an electrical discharge machining machine tool for small holes, which solves the problems that due to the relatively long electrode wire, a relatively long exposed circuit is formed after being energized, which easily causes safety problems, at the same time, the electrode wire will generate a certain vibration during machining. After the vibration acts on the long electrode wire, the vibration will gradually become larger and damage the electrode wire. In addition, during machining, the electrode wire is prone to cause the machining position of the machining hole to shift due to the inclination of the workpiece, resulting in machining failure.

[0005] To achieve the above object, the present invention is realized through the following technical solutions: An electrical discharge machining machine tool for small holes includes a machining platform, and a copper-tungsten wire support mechanism is arranged on the machining platform. The copper-tungsten wire support mechanism includes a fixed guiding block, a workpiece support, a transparent protection arc plate, a sliding column, and a movable copper-tungsten wire support block. A trumpet-shaped insertion hole is opened in the fixed guiding block, and the trumpet-shaped insertion hole is used for inserting the copper-tungsten wire. The workpiece support is installed at the bottom of the fixed guiding block and is used for extruding the workpiece downward. The transparent protection arc plate is rotatably connected to the fixed guiding block, and the transparent protection arc plate is used for isolating the energized copper-tungsten wire. The sliding column is fixedly connected to the top of the fixed guiding block, and the movable copper-tungsten wire support block is slidably connected to the sliding column. The movable copper-tungsten wire support block is used for supporting the copper-tungsten wire.

[0006] Preferably, a processing base is provided at the bottom of the processing platform. The processing base is used to support the processing platform. One end of the processing base is fixedly connected with a support arm, and the copper-tungsten wire support mechanism is arranged on the support arm.

[0007] Preferably, the processing platform includes a first moving seat, a second moving seat and a processing fixing plate. The first moving seat is used for displacement adjustment in the X-axis direction. The second moving seat is used for displacement adjustment in the Y-axis direction. The processing fixing plate is installed on the second moving seat. The workpiece support is used to fit with the processing fixing plate to clamp the workpiece to be processed.

[0008] Preferably, a third moving column, a rotating displacement disk and a downward feeding component are further arranged on the support arm. The third moving column is slidably connected to the support arm. A connecting plate is further arranged in the copper-tungsten wire support mechanism. The connecting plate is installed at the bottom end of the third moving column. The fixed guiding block is fixedly connected to one end of the third moving column. The rotating displacement disk is rotatably connected to the support arm. The rotating displacement disk is used to drive the third moving column for rough up and down adjustment. The copper-tungsten wire support mechanism is installed on the downward feeding component. The downward feeding component is used to drive the copper-tungsten wire for fine up and down adjustment.

[0009] Preferably, a lower rotating ring is fixedly connected to the bottom end of the transparent protection arc plate. An upper rotating ring is fixedly connected to the top end of the transparent protection arc plate. An upper fixed limiting plate is fixedly connected to the top end of the sliding column. A rotating top ring is fixedly connected to the top end of the upper fixed limiting plate. The upper rotating ring is rotatably connected to the rotating top ring.

[0010] Preferably, a rotating groove, a limiting fixing groove and a limiting side block are arranged in the fixed guiding block. The rotating groove is opened at the center of the fixed guiding block. The lower rotating ring is rotatably connected in the rotating groove. The limiting fixing groove is opened at one end of the fixed guiding block. One end of the transparent protection arc plate abuts against the limiting fixing groove. The limiting side block is fixedly connected to the other end of the fixed guiding block. The other end of the transparent protection arc plate abuts against the limiting side block.

[0011] Preferably, the downward feeding component includes a cylinder, an insulating liquid storage tank, a power output rod and an insulating liquid spray port. The cylinder is fixedly connected to the third moving column. The insulating liquid storage tank is fixedly connected to the third moving column. The power output rod is arranged at the bottom end of the cylinder. The power output rod is used to drive the copper-tungsten wire to move downward. The insulating liquid spray port is opened at the bottom end of the power output rod. The insulating liquid spray port is used to clamp the copper-tungsten wire and let the insulating liquid flow out along the copper-tungsten wire.

[0012] Preferably, a sliding groove, a tightening bolt and a collecting groove are provided on the movable copper-tungsten wire support block. The sliding groove is formed on the movable copper-tungsten wire support block, the sliding column is slidably connected in the sliding groove, the tightening bolt is threadedly connected to the movable copper-tungsten wire support block, and the tightening bolt is used to fix the movable copper-tungsten wire support block on the sliding column. The collecting groove is fixedly connected to the copper-tungsten wire, and the collecting groove is used to gather the insulating liquid dripping from above and drip it downward.

[0013] Preferably, the workpiece support includes a support short column, a spring and a support ring. The support short column is fixedly connected to the fixed guiding block, the spring is fixedly connected to the bottom end of the support short column, and the support ring is fixedly connected to the bottom end of the spring. The support ring is used to press and vertically hold the workpiece.

[0014] The present invention discloses an electric discharge machining machine for small holes, and its beneficial effects are as follows: 1. For this electric discharge machining machine for small holes, by providing a rotatable transparent protective arc plate, an arc-shaped transparent plate is arranged between the electrode wire and the operator during machining to prevent accidental contact or safety problems. At the same time, the transparent protective arc plate is used to block dust for the electrode wire.

[0015] 2. For this electric discharge machining machine for small holes, by providing an adjustable movable copper-tungsten wire support block, the electrode wire has a support along the way to prevent damage to the electrode wire caused by excessive vibration amplitude. In addition, a collecting groove is provided to collect the insulating liquid at the top and transfer it downward until it reaches the bottom for machining, preventing dust from contaminating the electrode wire.

[0016] 3. For this electric discharge machining machine for small holes, by providing a workpiece support at the bottom, during machining, the upper workpiece support applies a vertical downward pressure to the workpiece to prevent the workpiece from skewing and causing machining failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 It is a schematic front view of the whole of the present invention; Figure 2 It is a schematic side view of the whole of the present invention; Figure 3 It is a schematic partial view of the support arm of the present invention; Figure 4 It is a schematic partial view of the copper-tungsten wire support mechanism of the present invention; Figure 5 This is a schematic diagram of the partial structure of the copper-tungsten wire support mechanism of the present invention; Figure 6 This is a schematic diagram of the partial structure of the copper-tungsten wire support mechanism of the present invention; Figure 7 This is a schematic diagram of the overall structure of the movable copper-tungsten wire support block of the present invention; Figure 8 This is a schematic diagram of the partial structure of the copper-tungsten wire support mechanism of the present invention.

[0019] In the figure: 1. Processing base; 2. Processing platform; 21. First moving seat; 22. Second moving seat; 23. Processing fixed plate; 3. Support arm; 31. Third moving column; 32. Rotating displacement disk; 33. Pressing and feeding assembly; 331. Cylinder; 332. Insulating liquid storage tank; 333. Power output rod; 334. Insulating liquid spray port; 4. Copper-tungsten wire support mechanism; 41. Connecting plate; 42. Fixed guiding block; 421. Rotating groove; 422. Limit fixing groove; 423. Flared penetration hole; 424. Limit side block; 43. Workpiece support; 431. Support short column; 432. Spring; 433. Support ring; 44. Transparent protection arc plate; 441. Lower rotating ring; 442. Upper rotating ring; 45. Sliding column; 46. Movable copper-tungsten wire support block; 461. Chute; 462. Tightening bolt; 463. Collection groove; 47. Upper fixed limit plate; 471. Rotating top ring. Detailed implementation manners

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] By providing an electric discharge machining small hole machine tool in the embodiments of the present application, the problems are solved that since the electrode wire is relatively long, a relatively long exposed circuit is formed after being energized, which easily causes safety problems, and at the same time, the electrode wire will generate a certain vibration during machining, and the vibration will gradually increase and damage the electrode wire after acting on the long electrode wire. In addition, the electrode wire is prone to cause the machining position of the machining hole to shift due to the inclination of the workpiece during machining, resulting in machining failure.

[0022] To better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the accompanying drawings of the specification and specific implementation manners.

[0023] The embodiments of the present invention disclose an electric discharge machining small hole machine tool.

[0024] Example 1 According to the attached Figure 1-8 shown It includes a processing platform 2. A copper-tungsten wire support mechanism 4 is arranged on the processing platform 2. The copper-tungsten wire support mechanism 4 includes a fixed guiding block 42, a workpiece support 43, a transparent protective arc plate 44, a sliding column 45 and a movable copper-tungsten wire support block 46. A trumpet-shaped insertion hole 423 is opened in the fixed guiding block 42. The trumpet-shaped insertion hole 423 is used for inserting the copper-tungsten wire. The workpiece support 43 is installed at the bottom of the fixed guiding block 42 and is used for pressing the workpiece downward. The transparent protective arc plate 44 is rotatably connected to the fixed guiding block 42. The transparent protective arc plate 44 is used for isolating the energized copper-tungsten wire. The sliding column 45 is fixedly connected to the top of the fixed guiding block 42. The movable copper-tungsten wire support block 46 is slidably connected to the sliding column 45. The movable copper-tungsten wire support block 46 is used for supporting the copper-tungsten wire. When in use, the copper-tungsten wire is placed into the copper-tungsten wire support mechanism 4. The workpiece is pressed downward by the workpiece support 43. The movable copper-tungsten wire support block 46 is fixed by the sliding column 45. The copper-tungsten wire is supported by the movable copper-tungsten wire support block 46.

[0025] A processing base 1 is arranged at the bottom of the processing platform 2. The processing base 1 is used for supporting the processing platform 2. One end of the processing base 1 is fixedly connected with a support arm 3. The copper-tungsten wire support mechanism 4 is arranged on the support arm 3. The processing platform 2 includes a first moving seat 21, a second moving seat 22 and a processing fixing plate 23. The first moving seat 21 is used for adjusting the displacement in the X-axis direction. The second moving seat 22 is used for adjusting the displacement in the Y-axis direction. The processing fixing plate 23 is installed on the second moving seat 22. The workpiece support 43 is used for fitting with the processing fixing plate 23 to clamp the workpiece to be processed.

[0026] The support arm 3 is further provided with a third moving column 31, a rotating displacement disc 32 and a downward feeding assembly 33. The third moving column 31 is slidably connected to the support arm 3. A connecting plate 41 is further arranged inside the copper-tungsten wire support mechanism 4. The connecting plate 41 is installed at the bottom end of the third moving column 31. A fixed guiding block 42 is fixedly connected to one end of the third moving column 31. The rotating displacement disc 32 is rotatably connected to the support arm 3. The rotating displacement disc 32 is used to drive the third moving column 31 for rough up and down adjustment. The copper-tungsten wire support mechanism 4 is installed on the downward feeding assembly 33. The downward feeding assembly 33 is used to drive the copper-tungsten wire for fine up and down adjustment. The downward feeding assembly 33 includes a cylinder 331, an insulating liquid storage tank 332, a power output rod 333 and an insulating liquid spray port 334. The cylinder 331 is fixedly connected to the third moving column 31. The insulating liquid storage tank 332 is fixedly connected to the third moving column 31. The power output rod 333 is arranged at the bottom end of the cylinder 331. The power output rod 333 is used to drive the copper-tungsten wire to move downward. The insulating liquid spray port 334 is opened at the bottom end of the power output rod 333. The insulating liquid spray port 334 is used to clamp the copper-tungsten wire and let the insulating liquid flow out along the copper-tungsten wire. The copper-tungsten wire is installed into the insulating liquid spray port 334 from below. The insulating liquid flows downward along the copper-tungsten wire from the insulating liquid spray port 334 until it reaches the bottom layer.

[0027] Embodiment 2: On the basis of Embodiment 1, according to the attached Figure 1-8 as shown, The bottom end of the transparent protection arc plate 44 is fixedly connected with a lower rotating ring 441, and the top end of the transparent protection arc plate 44 is fixedly connected with an upper rotating ring 442. The top end of the sliding column 45 is fixedly connected with an upper fixed limiting plate 47, and the top end of the upper fixed limiting plate 47 is fixedly connected with a rotating top ring 471. The upper rotating ring 442 is rotatably connected to the rotating top ring 471. A rotating groove 421, a limiting fixed groove 422 and a limiting side block 424 are arranged inside the fixed guiding block 42. The rotating groove 421 is opened at the axis of the fixed guiding block 42. The lower rotating ring 441 is rotatably connected to the rotating groove 421. The limiting fixed groove 422 is opened at one end of the fixed guiding block 42. One end of the transparent protection arc plate 44 abuts against the limiting fixed groove 422. The limiting side block 424 is fixedly connected to the other end of the fixed guiding block 42. The other end of the transparent protection arc plate 44 abuts against the limiting side block 424. During processing, the transparent protection arc plate 44 abuts against the limiting side block 424. When disassembling the copper-tungsten wire after processing, the transparent protection arc plate 44 is rotated to the end close to the limiting fixed groove 422 for placement.

[0028] The movable copper-tungsten wire support block 46 is provided with a chute 461, a tightening bolt 462 and a collection groove 463. The chute 461 is opened on the movable copper-tungsten wire support block 46. The sliding column 45 is slidably connected in the chute 461. The tightening bolt 462 is threadedly connected to the movable copper-tungsten wire support block 46. The tightening bolt 462 is used to fix the movable copper-tungsten wire support block 46 on the sliding column 45. The collection groove 463 is fixedly connected to the copper-tungsten wire. The collection groove 463 is used to gather the insulating liquid dripping from above and drip it downward, preventing some insulating liquid from splashing out from the copper-tungsten wire, and the collection groove 463 collects this part of the insulating liquid.

[0029] The workpiece support 43 includes a support short column 431, a spring 432 and a support ring 433. The support short column 431 is fixedly connected to the fixed guide block 42. The spring 432 is fixedly connected to the bottom end of the support short column 431. The support ring 433 is fixedly connected to the bottom end of the spring 432. The support ring 433 is used to press the vertical workpiece tightly.

[0030] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art 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. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A small-hole electric discharge machining machine tool, comprising a machining platform (2), characterized in that, A copper-tungsten wire support mechanism (4) is provided on the processing platform (2), and the copper-tungsten wire support mechanism (4) includes: A fixed guiding block (42) is provided with a trumpet-shaped insertion hole (423) for inserting a copper-tungsten wire. A workpiece support (43) is installed at the bottom of the fixed guiding block (42) for extruding the workpiece downward. A transparent protective arc plate (44) is rotatably connected to the fixed guiding block (42) for isolating the energized copper-tungsten wire. A sliding column (45) is fixedly connected to the top of the fixed guiding block (42). A movable copper-tungsten wire support block (46) is slidably connected to the sliding column (45) for supporting the copper-tungsten wire.

2. The electric spark small hole machining machine tool according to claim 1, characterized in that: A processing base (1) is provided at the bottom of the processing platform (2) for supporting the processing platform (2). One end of the processing base (1) is fixedly connected to a support arm (3), and the copper-tungsten wire support mechanism (4) is provided on the support arm (3).

3. The electric spark small hole machining machine tool according to claim 1, characterized in that: The processing platform (2) includes: A first moving seat (21) for adjusting the displacement in the X-axis direction. A second moving seat (22) for adjusting the displacement in the Y-axis direction. A processing fixing plate (23) is installed on the second moving seat (22), and the workpiece support (43) is used to fit with the processing fixing plate (23) for clamping the workpiece to be processed.

4. A small-hole EDM machine tool according to claim 2, characterized in that: The following are also provided on the support arm (3): A third moving column (31) is slidably connected to the support arm (3). A connecting plate (41) is further provided in the copper-tungsten wire support mechanism (4). The connecting plate (41) is installed at the bottom end of the third moving column (31), and the fixed guiding block (42) is fixedly connected to one end of the third moving column (31). A rotating displacement disk (32) is rotatably connected to the support arm (3) for driving the third moving column (31) to perform rough up and down adjustment. A downward feeding component (33), and the copper-tungsten wire support mechanism (4) is installed on the downward feeding component (33) for driving the copper-tungsten wire to perform fine up and down adjustment.

5. A small-hole electric discharge machining machine tool according to claim 1, characterized in that: The bottom end of the transparent protective arc plate (44) is fixedly connected to a lower rotating ring (441), and the top end of the transparent protective arc plate (44) is fixedly connected to an upper rotating ring (442). The top end of the sliding column (45) is fixedly connected to an upper fixed limiting plate (47), and the top end of the upper fixed limiting plate (47) is fixedly connected to a rotating top ring (471). The upper rotating ring (442) is rotatably connected to the rotating top ring (471).

6. The electric spark small hole machining machine tool according to claim 5, characterized in that: The following are provided in the fixed guiding block (42): The rotation groove (421) is opened at the axis of the fixed guiding block (42), and the lower rotation ring (441) is rotatably connected in the rotation groove (421); The limit fixing groove (422) is opened at one end of the fixed guiding block (42), and one end of the transparent protection arc plate (44) abuts against the limit fixing groove (422); The limit side block (424) is fixedly connected to the other end of the fixed guiding block (42), and the other end of the transparent protection arc plate (44) abuts against the limit side block (424).

7. An electric discharge machining small hole machine tool according to claim 4, characterized in that: The downward pressing and feeding assembly (33) includes: The air cylinder (331) is fixedly connected to the third moving column (31); The insulating liquid storage tank (332) is fixedly connected to the third moving column (31); The power output rod (333) is arranged at the bottom end of the air cylinder (331), and the power output rod (333) is used to drive the copper-tungsten wire to move downward; The insulating liquid spray port (334) is opened at the bottom end of the power output rod (333), and the insulating liquid spray port (334) is used to clamp the copper-tungsten wire and let the insulating liquid flow out along the copper-tungsten wire.

8. A small-hole EDM machine tool according to claim 1, characterized in that: The mobile copper-tungsten wire support block (46) is provided with: The sliding groove (461) is opened on the mobile copper-tungsten wire support block (46), and the sliding column (45) is slidably connected in the sliding groove (461); The tightening bolt (462) is threadedly connected to the mobile copper-tungsten wire support block (46), and the tightening bolt (462) is used to fix the mobile copper-tungsten wire support block (46) on the sliding column (45); The collection groove (463) is fixedly connected to the copper-tungsten wire, and the collection groove (463) is used to gather the insulating liquid dripping from above and drip it downward.

9. A small-hole electric discharge machining machine tool according to claim 1, characterized in that: The workpiece support (43) includes: The support short column (431) is fixedly connected to the fixed guiding block (42); The spring (432) is fixedly connected to the bottom end of the support short column (431); The support ring (433) is fixedly connected to the bottom end of the spring (432), and the support ring (433) is used to press the vertical workpiece tightly.

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