Electrode rod axis independent positioning structure for EDM / electrolysis machine tools

Abstract

The invention discloses an independent axis positioning structure of an electrode rod of an electric spark / electrolysis machine tool, comprising a frame, on which is provided: a support assembly, on which the electrode rod is mounted, the support assembly comprising an upper support and a lower support, the upper support and the lower support being used to limit the radial movement of the electrode rod; a driven rotating part fixed on the electrode rod; an active rotating part, wherein the axis of the active rotating part and the axis of the electrode rod have two states of overlap or non-overlap, the active rotating part links the driven rotating part through a swing arm, the axis of the active rotating part and the axis of the electrode rod have no associated connection, the patent does not need to ensure that the axis of the electrode rod is coaxial with the axis of the active rotating part, the axis of the electrode rod is positioned and locked by an independent support assembly, thereby improving the accuracy of the electrical machining of the electrode rod.

Description

Technical Field

[0001] The invention relates to an electrode rod positioning device, and in particular to an electrode rod axis independent positioning structure of an electric spark / electrolysis machine tool. The electrode rod positioning structure is independent of a rotation drive structure, which is convenient for positioning the electrode rod axis. Background Art

[0002] Electrical discharge machining (EDM), also known as electrical discharge machining or electro-erosion machining, is a process in which pulsed spark discharge is continuously generated between the tool and the workpiece during the machining process, and the metal material is eroded by the instantaneous local high temperature generated during the discharge; the tool and the workpiece are not in contact during the machining process. This technology has been widely used in the micro-machining of hard and difficult-to-machine materials such as cemented carbide, die steel, hardened steel, polycrystalline diamond, and can also be used for the micro-machining of low-rigidity and complex-shaped workpieces.

[0003] Microelectrochemical machining refers to a processing method that uses electrochemical machining to obtain high-precision, small-sized parts within the micromachining range (1μm~1mm). It is now widely used in precision and ultra-precision micromachining of special-shaped parts such as cylindrical parts, spline holes, internal gears, molds, valve plates, etc.

[0004] Existing wire cutting machines are generally four-axis machining. For example, the machining quality of the Japanese Sodick slow-feed wire cutting machine AQ400LS is Ramax = 0.2-0.5μm, and the dimensional accuracy is 2μm. However, when the wire cutting machine is machining an inclined surface, the UV axis that adjusts the wire cutting machining angle has poor machining accuracy, which is not conducive to machining. In addition, the cutting line of the wire cutting machine is thin, and the cutting line may float during the impact cooling of the coolant, making the machined surface uneven. When the workpiece machining height is 100mm, the unevenness can reach 10μm. For this reason, it is hoped that the wire cutting machine can be replaced by an electrode rod processing machine.

[0005] The 2005 supplement of Volume 32 of Machinery, "Electro-Spark Contour Machining", introduced the A35R-E EDM contour machining machine tool of Japan Sodick, which can actually achieve a surface roughness Ramax = 10-5μm and a dimensional accuracy of 10-5μm. The EDM contour machining machine tool and the above-mentioned wire cutting machine are both produced by Sodick, and the transmission components, CNC system, and temperature control technology of the electric machining power supply of the machine tool are basically the same, but the processing quality of the two is very different.

[0006] After research and comparison, it was found that the electrode rods of EDM contour machining machines are generally installed on the rotating axis, and the positioning, clamping and rotation drive are all completed by the rotating axis.

[0007] For example, a simple micro-EDM / EC machining spindle with publication number CN111283278A includes a power source module, a power transmission module, and a power induction module. The power induction module includes a tool electrode chuck and a tool electrode. The tool electrode is clamped in the tool electrode chuck, and the tool electrode chuck can drive the tool electrode to rotate.

[0008] Problems of existing EDM contour machining machines: 1. The electrode rod is installed on the electric spindle used to drive the rotation. The axis of the electrode rod needs to coincide with the axis of the electric spindle. However, it is difficult to ensure that the axis of the electrode rod and the electric spindle coincide when assembling the electrode rod, resulting in an increase in machining errors.

[0009] Second, during electrolytic machining, the electrode rod does not need to be rotated because there is no loss in the electrode rod. However, it is difficult to locate the axis of the electrode rod when assembling it. After electrolytic machining, the electrode rod needs to be removed and repaired, and the axis of the repaired electrode rod needs to be repositioned, making assembly and positioning difficult. Summary of the invention

[0010] The technical problem to be solved by the present invention is to provide an independent axis positioning structure for an electrode rod of an electric spark / electrolysis machine, in particular to limit the radial movement of the electrode rod by upper and lower supports, thereby positioning the axis of the electrode rod.

[0011] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: an independent axis positioning structure of the electrode rod of the electric spark / electrolysis machine tool, including a frame, a support assembly arranged on the frame, and an electrode rod is installed on the support assembly. It is characterized in that the support assembly includes an upper support and a lower support, and the upper support and the lower support are used to limit the radial movement of the electrode rod. The working edge shape of the electrode rod used for electrical machining is consistent with the side shape of the workpiece after being processed by the electrode rod.

[0012] A further optimization scheme of the present invention is: a tapered center hole is provided on the end faces of the upper and lower ends of the electrode rod, and a pin matching the shape of the center hole is provided on the upper support and the lower support. The two pins are respectively placed in the center holes of the upper and lower end faces of the electrode rod to support the electrode rod.

[0013] A further optimization scheme of the present invention is that the upper support and the lower support include V-shaped grooves;

[0014] The electrode rod comprises two installation sections for cooperating with the upper support and the lower support, and a processing section for processing. The two installation sections of the electrode rod are respectively placed against the V-shaped groove wall of the upper support and the V-shaped groove wall of the lower support to locate the axis of the electrode rod.

[0015] The upper support and the lower support include a pressing piece, which extends into the V-shaped groove and is used to press the electrode rod tightly;

[0016] The support assembly further comprises an axial limiter, which is used to limit the axial movement of the electrode rod.

[0017] A further optimization scheme of the present invention is that the clamping piece includes a horizontal frame plate connected to the two side walls of the V-shaped groove, the horizontal frame plate is provided with screw holes for studs to be inserted, and one end of the stud is provided with an elastically deformable extrusion end, and the extrusion end is pressed on the surface of the electrode rod.

[0018] Another topic: The electrode rod axis independent positioning structure of the electric spark / electrolysis machine tool includes a frame, which is characterized in that the frame is provided with:

[0019] A support assembly, on which an electrode rod is mounted, the support assembly comprising an upper support and a lower support, the upper support and the lower support being used to limit radial movement of the electrode rod;

[0020] A driven rotating member is fixed on the electrode rod;

[0021] The active rotating part has an axis that is either coincident or non-coincident with the axis of the electrode rod. The active rotating part is linked to the driven rotating part through a swing arm, and the axis of the active rotating part and the axis of the electrode rod are not associated and connected.

[0022] A further optimization scheme of the present invention is: a tapered center hole is provided on the end faces of the upper and lower ends of the electrode rod, and a pin matching the shape of the center hole is provided on the upper support and the lower support. The two pins are respectively placed in the center holes of the upper and lower end faces of the electrode rod to support the electrode rod.

[0023] A further optimized solution of the present invention is: the upper support and the active rotating member are connected to the same lifting frame, the lower support is fixed on the frame, and the lifting frame can move up and down relative to the frame.

[0024] A further optimization scheme of the present invention is: the upper support is fixed on the lifting frame, the outer side of the upper support is sleeved with a bearing, the inner ring of the bearing is connected to the upper support, the active rotating part is a driven wheel, the driven wheel is sleeved on the bearing and connected to the outer ring, the lifting frame is provided with a driving motor, the output shaft of the driving motor is connected to a driving wheel, a transmission belt is connected between the driving wheel and the driven wheel, and the driving motor drives the active rotating part to rotate through the driving wheel.

[0025] A further optimized solution of the present invention is: the upper support and the lower support include V-shaped grooves;

[0026] The electrode rod comprises two installation sections for cooperating with the upper support and the lower support, and a processing section for processing. The two installation sections of the electrode rod are respectively placed against the V-shaped groove wall of the upper support and the V-shaped groove wall of the lower support to locate the axis of the electrode rod.

[0027] The upper support and the lower support include a pressing piece, which extends into the V-shaped groove and is used to press the electrode rod tightly;

[0028] The support assembly further comprises an axial limiter, which is used to limit the axial movement of the electrode rod.

[0029] A further optimized solution of the present invention is: the active rotating member is connected to the lifting frame, the upper support and the lower support are fixed on the frame, and the lifting frame can drive the active rotating member to move up and down relative to the frame.

[0030] A further optimization scheme of the present invention is: the swing arm has an extension length in the vertical direction, the driven rotating part is provided with a closed-loop or non-closed-loop slot hole, or a push arm, the swing arm leans against the inner wall of the slot hole or the push arm, the swing arm can move freely in the axial and radial directions relative to the slot hole or the push arm, and the swing arm can rotate the driven rotating part by pushing the inner wall of the slot hole or the push arm.

[0031] Compared with the prior art, the advantage of the present invention is that the radial movement of the electrode rod is limited by the upper support and the lower support, so as to locate the axis of the electrode rod, which can prevent the axis of the electrode rod from shifting and has better stability.

[0032] The active rotating member is linked to the driven rotating member fixed on the electrode rod through a swing arm. The axis of the active rotating member and the axis of the electrode rod are not associated and connected. The active rotating member only drives the electrode rod to rotate through the swing arm, and the positioning and clamping of the electrode rod are completed by another supporting component independent of the active rotating member. There is no need to ensure that the axis of the electrode rod coincides with the axis of the active rotating member, thereby improving the accuracy of the assembly of the electrode rod axis. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0034] Figure 1 The overall structure of the machine tool in Example 1 Figure 1 ;

[0035] Figure 2 The overall structure of the machine tool in Example 1 Figure 2 ;

[0036] Figure 3 The overall structure of the upper support and the lower support for clamping and positioning the electrode rod in Example 1 Figure 1 ;

[0037] Figure 4 The overall structure of the upper support and the lower support for clamping and positioning the electrode rod in Example 1 Figure 2 ;

[0038] Figure 5 It is a cross-sectional view of the upper support and the lower support for clamping and positioning the electrode rod in the first embodiment;

[0039] Figure 6 This is a state diagram of the upper support and the active rotating member of the first embodiment when they move upward;

[0040] Figure 7 The overall structure of the machine tool in the second embodiment Figure 1 ;

[0041] Figure 8 The overall structure of the machine tool in the second embodiment Figure 2 ;

[0042] Fig. 9 The overall structure of the upper support and the lower support for clamping and positioning the electrode rod in the second embodiment Figure 1 ;

[0043] Fig.10 The overall structure of the upper support and the lower support for clamping and positioning the electrode rod in the second embodiment Figure 2 ;

[0044] Fig.11 The connection structure of the upper support, the lower support and the co-positioned retainer of the second embodiment;

[0045] Fig.12 This is a cross-sectional view of the upper support and the lower support for clamping and positioning the electrode rod in Example 2;

[0046] Fig.13 This is a state diagram of the active rotating member of the second embodiment when it moves upward.

[0047] In the figure: 1. machine tool bed; 2. X-axis displacement mechanism; 21. X-axis motor; 22. X-axis fixed guide rail; 23. X-axis screw rod; 24. X-axis moving guide rail; 3. clamping seat; 31. support seat; 32. positioning column; 33. screw rod; 34. pressing nut; 35. pressing plate; 4. Y-axis displacement mechanism; 41. Y-axis motor; 42. Y-axis fixed guide rail; 43. Y-axis moving guide rail; 44. Y-axis screw rod; 5. frame; 51. horizontal frame; 52. column; 6. lifting frame; 61. Z-axis motor; 62. Z-axis screw rod; 63. Z-axis fixed guide rail; 64. Z-axis moving guide rail; 7. workpiece; 8. electrode rod; 81. installation section; 82. processing section; 9. support Support assembly; 91, lower support; 92, ejector pin; 93, upper support; 94, center hole; 95, V-shaped groove; 96, cross frame plate; 97, extrusion end; 98, stud; 100, driven rotating member; 101, driving motor; 102, driving wheel; 103, driving belt; 104, active rotating member; 105, thrust arm; 106, swing arm; 107, bearing; 108, same-position retaining frame; 109, axial limit member; 110, horizontal support; 111, vertical support; 112, positioning groove; 113, fixing seat; 114, locking bolt; 115, limiting long groove; 116, light rod; 117, annular limiting groove; 118, center column. DETAILED DESCRIPTION

[0048] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It will be appreciated by those skilled in the art that these descriptions are only illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0049] It should be noted that like reference numerals denote similar items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0050] Embodiment 1

[0051] Modern electrospark machining or electrolytic machining is performed by immersing the tool cathode and the workpiece anode in the working pool at the same time. The pulse discharge between the two electrodes produces electro-erosion, and the surface of the workpiece 7 is processed. Finally, the surface shape of the workpiece 7 is made to match the working edge shape of the tool cathode used for electrical machining. The workpiece anode is the workpiece 7 to be processed installed on the machine tool bed 1, and the workpiece 7 is connected to the anode. The tool cathode is an electrode rod 8 installed on the machine tool bed 1 and connected to the cathode.

[0052] Figure 1-Figure 6 As shown, the EDM / electrolysis machine tool comprises a machine bed 1 on which a clamping seat 3 for clamping a workpiece 7 to be processed, a frame 5, an X-axis displacement mechanism 2 and a Y-axis displacement mechanism 4 are provided.

[0053] Figure 1 , Figure 2 As shown, the X-axis displacement mechanism 2 includes an X-axis fixed guide rail 22 fixed on the machine tool bed 1, an X-axis movable guide rail 24 slidably arranged on the X-axis fixed guide rail 22, and an X-axis motor 21. The X-axis motor 21 is fixed on the machine tool bed 1. An X-axis screw rod 23 is connected to the output shaft of the X-axis motor 21, and an X-axis nut is sleeved on the X-axis screw rod 23. The X-axis movable guide rail 24 is fixedly connected to the X-axis nut. The X-axis screw rod 23 is arranged along the X-axis direction. When the X-axis motor 21 drives the X-axis screw rod 23 to rotate, the X-axis screw rod 23 drives the X-axis movable guide rail 24 to move in the X-axis direction. The X-axis displacement mechanism 2 is the same as the displacement drive mechanism on the machine tools on the existing market.

[0054] The clamping seat 3 is fixed on the X-axis moving guide rail 24 . The clamping seat 3 includes two support seats 31 arranged on the left and right. There is a space between the two support seats 31 . The support seats 31 are fixed on the X-axis moving guide rail 24 .

[0055] A pressing plate 35 that can move up and down in the vertical direction is provided on the support seat 31. The support seat 31 is provided with a screw rod 33 arranged in the Z-axis direction, and a through hole is provided on the pressing plate 35 for the screw rod 33 to pass through. The pressing plate 35 is sleeved on the screw rod 33 and can move up and down in the Z-axis direction. A pressing nut 34 is sleeved on the screw rod 33, and the pressing nut 34 is located above the pressing plate 35. When the workpiece 7 is placed on the two support seats 31, the pressing nut 34 is screwed down so that the pressing nut 34 presses the pressing plate 35 tightly on the workpiece 7. The pressing plates 35 on the two support seats 31 press both sides of the workpiece 7 on the upper surfaces of the two support seats 31 to fix the workpiece 7. The workpiece 7 is provided with a hole or surface to be processed.

[0056] In addition, the support seat 31 is provided with a positioning column 32 arranged in the Z-axis direction. There are two positioning columns 32, and the two positioning columns 32 are located on both sides of the screw rod 33. The pressure plate 35 is provided with a positioning hole that matches the positioning column 32. The two positioning columns 32 are inserted into the positioning holes to limit the pressure plate 35 to move in the Z-axis direction to prevent the pressure plate 35 from swinging left and right.

[0057] The Y-axis displacement mechanism 4 includes a Y-axis fixed guide rail 42 fixed on the machine tool bed 1, a Y-axis movable guide rail 43 slidably arranged on the Y-axis fixed guide rail 42, and a Y-axis motor 41. The Y-axis motor 41 is fixed on the machine tool bed 1. A Y-axis screw rod 44 is connected to the output shaft of the Y-axis motor 41. A Y-axis nut is sleeved on the Y-axis screw rod 44. The Y-axis movable guide rail 43 is fixedly connected to the Y-axis nut. The Y-axis screw rod 44 is arranged along the Y-axis. When the Y-axis motor 41 drives the Y-axis screw rod 44 to rotate, the Y-axis screw rod 44 drives the Y-axis movable guide rail 43 to move in the Y-axis direction. The Y-axis displacement mechanism 4 is the same as the displacement drive mechanism on the machine tools on the existing market.

[0058] The frame 5 is fixed on the Y-axis moving guide rail 43.

[0059] Figure 3 , Figure 4 As shown, a support assembly 9 is provided on the frame 5, and an electrode rod 8 for electrical machining is installed on the support assembly 9. The support assembly 9 includes an upper support 93 and a lower support 91. The upper support 93 and the lower support 91 are used to limit the radial movement of the electrode rod 8, thereby positioning the axis of the electrode rod 8 and preventing the axis of the electrode rod 8 from shifting.

[0060] The frame 5 includes a cross frame 51 and a column 52 fixed on the Y-axis moving guide rail 43.

[0061] The horizontal frame 51 extends from the Y-axis movable guide rail 43 along the Y-axis direction, and the lower support 91 is fixed on the horizontal frame 51 .

[0062] The column 52 is provided with a lifting frame 6 that can move in the Z-axis direction. Specifically, a Z-axis fixed guide rail 63 and a Z-axis motor 61 are fixed on the column 52, a Z-axis moving guide rail 64 is slidably connected to the Z-axis fixed guide rail 63, a Z-axis screw rod 62 is fixedly connected to the output shaft of the Z-axis motor 61, a Z-axis nut is sleeved on the Z-axis screw rod 62, the Z-axis moving guide rail 64 is fixedly connected to the Z-axis nut, the Z-axis screw rod 62 is arranged along the Z-axis direction, when the Z-axis motor 61 drives the Z-axis screw rod 62 to rotate, the Z-axis screw rod 62 drives the Z-axis moving guide rail 64 to move up and down in the Z-axis direction, the lifting frame 6 is fixed on the Z-axis moving guide rail 64, and the Z-axis moving guide rail 64 moves up and down with the lifting frame 6. The structure of the coordinated movement of the Z-axis fixed guide rail 63 and the Z-axis moving guide rail 64 is the same as the displacement drive mechanism on the machine tools on the existing market.

[0063] The upper support 93 is fixed on the lifting frame 6 , and the upper support 93 is located above the lower support 91 and opposite to the lower support 91 .

[0064] The upper support 93 and the lower support 91 are respectively pressed against the upper and lower end surfaces of the electrode rod 8 to fix the upper and lower ends of the electrode rod 8, thereby limiting the axial and radial movement of the electrode rod 8 and positioning the axis of the electrode rod 8.

[0065] Figure 5As shown, the end surfaces of the upper and lower ends of the electrode rod 8 are provided with a tapered center hole 94, and the upper support 93 and the lower support 91 are provided with a pin 92 matching the shape of the center hole 94. The taper of the center hole 94 located at the upper end surface of the electrode rod 8 serves as a guide edge to gather the pin 92 of the upper support 93 to the axis of the electrode rod 8, and the taper of the center hole 94 located at the lower end surface of the electrode rod 8 serves as a guide edge to gather the pin 92 of the lower support 91 to the axis of the electrode rod 8. The two pins 92 are respectively pushed against The center holes 94 on the upper and lower end surfaces of the electrode rod 8 are used to support the electrode rod 8. The ejector pins 92 of the upper support 93 and the ejector pins 92 of the lower support 91 gradually adjust the position of the electrode rod 8 during the process of inserting into the center holes 94 at both ends of the electrode rod 8. When the ejector pins 92 of the upper support 93 and the ejector pins 92 of the lower support 91 are fully inserted into the center holes 94 at both ends of the electrode rod 8, the axis of the electrode rod 8 is positioned so that the axis of the electrode rod 8 is always on the line connecting the two points of the ejector pins 92 of the upper support 93 and the ejector pins 92 of the lower support 91. The upper support 93 and the lower support 91 are used to limit the axial and radial movement of the electrode rod 8 and to position the axis of the electrode rod 8.

[0066] The ejector pin 92 of the upper support 93 and the ejector pin 92 of the lower support 91 are only inserted into the center holes 94 at the upper and lower ends of the electrode rod 8 to locate the axis of the electrode rod 8 and limit the axial and radial movement of the electrode rod 8. The ejector pin 92 of the upper support 93 and the ejector pin 92 of the lower support 91 do not exert strong pressure on the middle electrode rod 8 and will not affect the rotation of the electrode rod 8.

[0067] Preferably, the center holes 94 at the upper and lower ends of the electrode rod 8 are trumpet-shaped, conical-shaped, or truncated cone-shaped, and the inner wall of the center hole 94 converges toward the axis of the electrode rod 8 .

[0068] The frame 5 is also provided with an active rotating member 104 and a driven rotating member 100. The driven rotating member 100 is fixed on the electrode rod 8. The active rotating member 104 and the electrode rod 8 have two states of overlap or non-overlap. The active rotating member 104 is linked to the driven rotating member 100 through the swing arm 106. When the active rotating member 104 rotates, it is linked with the driven rotating member 100 through the swing arm 106, thereby driving the driven rotating member 100 to rotate, and the driven rotating member 100 drives the electrode rod 8 to rotate. The axis of the active rotating member 104 and the axis of the electrode rod 8 are not associated and connected, that is, the axis of the electrode rod 8 is not connected to the axis of the active rotating member 104.

[0069] The active rotating member 104 and the upper support 93 are arranged on the same lifting frame 6, the swing arm 106 is fixed on the active rotating member 104, the swing arm 106 is eccentric to the axis of the active rotating member 104, and the swing arm 106 has an extension length in the vertical direction. The driven rotating member 100 is provided with a closed-loop or non-closed-loop slot, or the driven rotating member 100 is provided with a push arm 105, the swing arm 106 leans against the inner wall of the slot or the push arm 105, and the swing arm 106 can move freely relative to the slot or the push arm 105 in the axial and radial directions. When the active rotating member 104 drives the swing arm 106 to rotate eccentrically, the swing arm 106 leans against the inner wall of the slot or the push arm 105 to push the driven rotating member 100 to rotate, and then drives the electrode rod 8 to rotate through the driven rotating member 100. The swing arm 106 can freely move relative to the slot or the thrust arm 105 in the axial and radial directions so that the vibration of the active rotating member 104 will not be transmitted to the electrode rod 8 through the swing arm 106, thereby avoiding affecting the stability of the electrode rod 8, and the structure of the swing arm 106 will not affect the positioning of the axis of the electrode rod 8.

[0070] Preferably, the active rotating member 104 is a driven wheel, the outer side of the upper support 93 is sleeved with a bearing 107, the driven wheel is sleeved on the outside of the bearing 107, the inner ring of the bearing 107 is connected to the upper support 93, the outer ring of the bearing 107 is connected to the driven wheel, a driving motor 101 is fixed on the lifting frame 6, the output shaft of the driving motor 101 is connected to the active wheel 102, a transmission belt 103 is connected between the active wheel 102 and the driven wheel, when the driving motor 101 drives the active wheel 102 to rotate, the active wheel 102 drives the driven wheel to rotate through the transmission belt 103, the swing arm 106 is fixed on the bottom surface of the driven wheel, and is eccentric to the axis of the driven wheel, and the rotation of the driven wheel drives the swing arm 106 to rotate eccentrically. Since the inner and outer rings of the bearing 107 will deflect when rotating, the axis of the active rotating member 104 will deflect, so that the axis of the active rotating member 104 and the axis of the electrode rod 8 have two states of coincidence or non-coincidence.

[0071] The driven rotating member 100 is a sleeve ring, which is sleeved on the electrode rod 8 . The sleeve ring can be fixedly connected to the electrode rod 8 by screws, and the sleeve ring can also be tightly matched with the electrode rod 8 .

[0072] When the electrode rod 8 is needed to perform electrical machining on the workpiece 7, the active rotating member 104 drives the swing arm 106 to rotate eccentrically, and the swing arm 106 rotates by pushing the driven rotating member 100, thereby rotating the electrode rod 8. The X-axis displacement mechanism 2 and the Y-axis displacement mechanism 4 drive the frame 5 and the clamping seat 3 to move relative to each other in the X-axis and the Y-axis, so that the electrode rod 8 can process the edge of the required shape in the hole to be processed or the outer surface of the workpiece 7. The working edge shape of the electrode rod 8 is consistent with the side shape of the workpiece 7 after being processed by the electrode rod 8. For example, the working edge shape of the electrode rod 8 is a bevel, and the side shape of the workpiece 7 after being processed by the electrode rod 8 is also a bevel that matches the working edge of the electrode rod 8.

[0073] Figure 6 As shown, when the electrode rod 8 needs to be removed, the lifting frame 6 drives the upper support 93 and the active rotating member 104 to move upward relative to the frame 5, so that the upper part of the electrode rod 8 is not supported, and the worker can take the electrode rod 8 out upward.

[0074] The upper support 93 and the lower support 91 can be used to repeatedly position the axis of the electrode rod 8.

[0075] Embodiment 2

[0076] Modern electrospark machining or electrolytic machining is performed by immersing the tool cathode and the workpiece anode in the working medium at the same time. The pulse discharge between the two electrodes produces electro-erosion, and the surface of the workpiece 7 is processed. Finally, the surface shape of the workpiece 7 is made to match the working edge shape of the tool cathode used for electrical machining. The workpiece anode is the workpiece 7 to be processed installed on the machine tool bed 1, and the workpiece 7 is connected to the anode. The tool cathode is an electrode rod 8 installed on the machine tool bed 1 and connected to the cathode.

[0077] Figure 7-Figure 13 As shown, the EDM / electrolysis machine tool comprises a machine bed 1 on which a clamping seat 3 for clamping a workpiece 7 to be processed, a frame 5, an X-axis displacement mechanism 2 and a Y-axis displacement mechanism 4 are provided.

[0078] Figure 7 , Figure 8 As shown, the X-axis displacement mechanism 2 includes an X-axis fixed guide rail 22 fixed on the machine tool bed 1, an X-axis movable guide rail 24 slidably arranged on the X-axis fixed guide rail 22, and an X-axis motor 21. The X-axis motor 21 is fixed on the machine tool bed 1. An X-axis screw rod 23 is connected to the output shaft of the X-axis motor 21, and an X-axis nut is sleeved on the X-axis screw rod 23. The X-axis movable guide rail 24 is fixedly connected to the X-axis nut. The X-axis screw rod 23 is arranged along the X-axis direction. When the X-axis motor 21 drives the X-axis screw rod 23 to rotate, the X-axis screw rod 23 drives the X-axis movable guide rail 24 to move in the X-axis direction. The X-axis displacement mechanism 2 is the same as the displacement drive mechanism on the machine tools on the existing market.

[0079] The clamping seat 3 is fixed on the X-axis moving guide rail 24 . The clamping seat 3 includes two support seats 31 arranged on the left and right. There is a space between the two support seats 31 . The support seats 31 are fixed on the X-axis moving guide rail 24 .

[0080] A pressing plate 35 that can move up and down in the vertical direction is provided on the support seat 31. The support seat 31 is provided with a screw rod 33 arranged in the Z-axis direction, and a through hole is provided on the pressing plate 35 for the screw rod 33 to pass through. The pressing plate 35 is sleeved on the screw rod 33 and can move up and down in the Z-axis direction. A pressing nut 34 is sleeved on the screw rod 33, and the pressing nut 34 is located above the pressing plate 35. When the workpiece 7 is placed on the two support seats 31, the pressing nut 34 is screwed down so that the pressing nut 34 presses the pressing plate 35 tightly on the workpiece 7. The pressing plates 35 on the two support seats 31 press both sides of the workpiece 7 on the upper surfaces of the two support seats 31 to fix the workpiece 7. The workpiece 7 is provided with a hole or surface to be processed.

[0081] In addition, the support seat 31 is provided with a positioning column 32 arranged in the Z-axis direction. There are two positioning columns 32, and the two positioning columns 32 are located on both sides of the screw rod 33. The pressure plate 35 is provided with a positioning hole that matches the positioning column 32. The two positioning columns 32 are inserted into the positioning holes to limit the pressure plate 35 to move in the Z-axis direction to prevent the pressure plate 35 from swinging left and right.

[0082] The Y-axis displacement mechanism 4 includes a Y-axis fixed guide rail 42 fixed on the machine tool bed 1, a Y-axis movable guide rail 43 slidably arranged on the Y-axis fixed guide rail 42, and a Y-axis motor 41. The Y-axis motor 41 is fixed on the machine tool bed 1. A Y-axis screw rod 44 is connected to the output shaft of the Y-axis motor 41. A Y-axis nut is sleeved on the Y-axis screw rod 44. The Y-axis movable guide rail 43 is fixedly connected to the Y-axis nut. The Y-axis screw rod 44 is arranged along the Y-axis. When the Y-axis motor 41 drives the Y-axis screw rod 44 to rotate, the Y-axis screw rod 44 drives the Y-axis movable guide rail 43 to move in the Y-axis direction. The Y-axis displacement mechanism 4 is the same as the displacement drive mechanism on the machine tools on the existing market.

[0083] The frame 5 is fixed on the Y-axis moving guide rail 43.

[0084] Fig. 9 , Fig.10 As shown, a support assembly 9 is provided on the frame 5, and an electrode rod 8 for electrical machining is installed on the support assembly 9. The support assembly 9 includes an upper support 93 and a lower support 91. The upper support 93 and the lower support 91 are used to limit the radial movement of the electrode rod 8, thereby positioning the axis of the electrode rod 8 and preventing the axis of the electrode rod 8 from shifting.

[0085] The frame 5 includes a mounting plate fixed on the top surface of the Y-axis moving guide rail 43, and a co-position retaining frame 108 and a column 52 are fixed on the mounting plate.

[0086] The isotropic retaining frame 108 extends from the Y-axis moving guide rail 43 along the Y-axis direction, and the upper support 93 and the lower support 91 are fixed on the same isotropic retaining frame 108. The upper support 93 and the lower support 91 both include a V-shaped groove 95. The V-shaped groove 95 of the upper support 93 and the V-shaped groove 95 of the lower support 91 are parallel and have corresponding upper and lower positions.

[0087] Fig.11 As shown, the same position retainer 108 includes a vertical support 111 and two horizontal supports 110 fixed on the upper and lower ends of the vertical support 111, the upper support 93 is fixed on the horizontal support 110 located at the upper end, and the lower support 91 is fixed on the horizontal support 110 located at the lower end. The two horizontal supports 110 are provided with positioning grooves 112, and the positioning grooves 112 are V-shaped. The shapes of the upper support 93 and the lower support 91 match the positioning grooves 112. The upper support 93 and the lower support 91 are respectively inserted into the positioning grooves 112 on the two horizontal supports 110 for positioning, and then the upper support 93 and the lower support 91 are fixed to the two horizontal supports 110 by screws. The positioning grooves 112 facilitate positioning of the V-shaped grooves 95 of the upper support 93 and the lower support 91.

[0088] Fig.12 As shown, the electrode rod 8 includes two mounting sections 81 for matching the upper support 93 and the lower support 91, and a processing section 82 for processing. The two mounting sections 81 have the same diameter. The two mounting sections 81 of the electrode rod 8 are respectively placed against the groove wall of the V-shaped groove 95 of the upper support 93 and the groove wall of the V-shaped groove 95 of the lower support 91 to position the axis of the electrode rod 8.

[0089] The upper support 93 and the lower support 91 include a clamping piece. When the V-shaped groove 95 of the upper support 93 and the V-shaped groove 95 of the lower support 91 locate the axis of the electrode rod 8, the clamping piece extends into the V-shaped groove 95 and is used to tighten the electrode rod 8, thereby limiting the radial movement of the electrode rod 8.

[0090] The pressing member includes a cross frame plate 96 connected to the two side walls of the V-shaped groove 95, and a first screw hole for inserting a stud 98 is provided on the cross frame plate 96. One end of the stud 98 is provided with an elastically deformable extrusion end 97. When the stud 98 is screwed into the V-shaped groove 95, the extrusion end 97 presses on the surface of the electrode rod 8 to tighten the electrode rod 8. Since the two mounting sections 81 of the electrode rod 8 used to match the upper support 93 and the lower support 91 have the same diameter, when the extrusion end 97 presses the electrode rod 8 against the two side walls of the V-shaped groove 95, the V-shaped groove 95 of the upper support 93 and the V-shaped groove 95 of the lower support 91 locate the axis of the electrode rod 8, thereby limiting the radial movement of the electrode rod 8.

[0091] Preferably, the extrusion end 97 is a tightening spring, and the elastic force of the tightening spring tightens the electrode rod 8 against the two side walls of the V-shaped groove 95. The tightening force of the tightening spring can be adjusted by screwing in or out the stud 98. The tightening spring only provides a tightening force to the electrode rod 8, but does not affect the rotation of the electrode rod 8.

[0092] The support assembly 9 further includes an axial limiter 109, which is used to limit the axial movement of the electrode rod 8. An annular limiter groove 117 is provided on the electrode rod 8, and the axial limiter 109 is fixed on the same position retainer 108. The axial limiter 109 is inserted into the annular limiter groove 117 to limit the axial movement of the electrode rod 8, and the width of the axial limiter 109 is equal to the width of the annular limiter groove.

[0093] Preferably, the axial limiting member 109 is a polished rod 116, and a fixing seat 113 is fixed on the same position retainer 108. The fixing seat 113 has a through hole for the polished rod 116 to pass through, and the through hole faces the annular limiting groove 117 on the electrode rod 8. The polished rod 116 passes through the through hole and is inserted into the annular limiting groove 117 of the electrode rod 8. The polished rod 116 is provided with a limiting long groove 115 extending along the length direction, and the fixing seat 113 is provided with a second screw hole, which is connected to the through hole, and a locking bolt 114 is screwed in the second screw hole. The locking bolt 114 is inserted into the limiting long groove 115 to limit the movement of the polished rod 116 on the Y axis. When the polished rod 116 needs to be locked, the locking bolt 114 is screwed downward to press the polished rod 116 against the inner wall of the through hole to lock it. The position of the polished rod 116 can be adjusted by the locking bolt 114 to adapt to electrode rods 8 of different diameters. The insertion of the light rod 116 into the annular limiting groove 117 does not affect the rotation of the electrode rod 8 .

[0094] The column 52 is provided with a lifting frame 6 that can move in the Z-axis direction. Specifically, a Z-axis fixed guide rail 63 and a Z-axis motor 61 are fixed on the column 52, a Z-axis moving guide rail 64 is slidably connected to the Z-axis fixed guide rail 63, a Z-axis screw rod 62 is fixedly connected to the output shaft of the Z-axis motor 61, a Z-axis nut is sleeved on the Z-axis screw rod 62, the Z-axis moving guide rail 64 is fixedly connected to the Z-axis nut, the Z-axis screw rod 62 is arranged along the Z-axis direction, when the Z-axis motor 61 drives the Z-axis screw rod 62 to rotate, the Z-axis screw rod 62 drives the Z-axis moving guide rail 64 to move up and down in the Z-axis direction, the lifting frame 6 is fixed on the Z-axis moving guide rail 64, and the Z-axis moving guide rail 64 moves up and down with the lifting frame 6. The structure of the coordinated movement of the Z-axis fixed guide rail 63 and the Z-axis moving guide rail 64 is the same as the displacement drive mechanism on the machine tools on the existing market.

[0095] The frame 5 is also provided with an active rotating member 104 and a driven rotating member 100. The driven rotating member 100 is fixed on the electrode rod 8. The active rotating member 104 and the electrode rod 8 have two states of overlap or non-overlap. The active rotating member 104 is linked to the driven rotating member 100 through the swing arm 106. When the active rotating member 104 rotates, it is linked with the driven rotating member 100 through the swing arm 106, thereby driving the driven rotating member 100 to rotate, and the driven rotating member 100 drives the electrode rod 8 to rotate. The axis of the active rotating member 104 and the axis of the electrode rod 8 are not associated and connected, that is, the axis of the electrode rod 8 is not connected to the axis of the active rotating member 104.

[0096] The active rotating member 104 is arranged on the lifting frame 6, and the swing arm 106 is fixed on the active rotating member 104. The swing arm 106 is eccentric to the axis of the active rotating member 104, and the swing arm 106 has an extension length in the vertical direction. The driven rotating member 100 is provided with a closed-loop or non-closed-loop slot, or the driven rotating member 100 is provided with a push arm 105. The swing arm 106 leans against the inner wall of the slot or the push arm 105, and the swing arm 106 can move freely relative to the slot or the push arm 105 in the axial and radial directions. When the active rotating member 104 drives the swing arm 106 to rotate eccentrically, the swing arm 106 leans against the inner wall of the slot or the push arm 105 to push the driven rotating member 100 to rotate, and then drives the electrode rod 8 to rotate through the driven rotating member 100. The swing arm 106 can freely move relative to the slot or the thrust arm 105 in the axial and radial directions so that the vibration of the active rotating member 104 will not be transmitted to the electrode rod 8 through the swing arm 106, thereby avoiding affecting the stability of the electrode rod 8, and the structure of the swing arm 106 will not affect the positioning of the axis of the electrode rod 8.

[0097] Preferably, the active rotating member 104 is a driven wheel, a central column 118 is fixed on the lifting frame 6, a bearing 107 is sleeved on the outer side of the central column 118, the driven wheel is sleeved on the outside of the bearing 107, the inner ring of the bearing 107 is connected to the central column 118, and the outer ring of the bearing 107 is connected to the driven wheel, a driving motor 101 is fixed on the lifting frame 6, a driving wheel 102 is connected to the output shaft of the driving motor 101, a transmission belt 103 is connected between the driving wheel 102 and the driven wheel, when the driving motor 101 drives the driving wheel 102 to rotate, the driving wheel 102 drives the driven wheel to rotate through the transmission belt 103, the swing arm 106 is fixed on the bottom surface of the driven wheel, and is eccentric to the axis of the driven wheel, the rotation of the driven wheel drives the swing arm 106 to rotate eccentrically. Since the inner and outer rings of the bearing 107 deflect when rotating, the axis of the active rotating member 104 deflects, so that the active rotating member 104 and the electrode rod 8 have two states of overlap or non-overlap.

[0098] The driven rotating member 100 is a sleeve ring, which is sleeved on the electrode rod 8 . The sleeve ring can be fixedly connected to the electrode rod 8 by screws, and the sleeve ring can also be tightly matched with the electrode rod 8 .

[0099] When the electrode rod 8 is needed to perform electrical machining on the workpiece 7, the active rotating member 104 drives the swing arm 106 to rotate eccentrically, and the swing arm 106 rotates by pushing the driven rotating member 100, thereby rotating the electrode rod 8. The X-axis displacement mechanism 2 and the Y-axis displacement mechanism 4 drive the frame 5 and the clamping seat 3 to move relative to each other in the X-axis and the Y-axis, so that the electrode rod 8 can process the edge of the required shape in the hole to be processed or the outer surface of the workpiece 7. The working edge shape of the electrode rod 8 is consistent with the side shape of the workpiece 7 after being processed by the electrode rod 8. For example, the working edge shape of the electrode rod 8 is a bevel, and the side shape of the workpiece 7 after being processed by the electrode rod 8 is also a bevel that matches the working edge of the electrode rod 8.

[0100] The two mounting sections 81 of the electrode rod 8 can be arranged at the upper and lower ends of the electrode rod 8, and the processing section 82 of the electrode rod 8 is arranged in the middle, and the workpiece 7 is processed through the electrode rod 8 in the middle; the two mounting sections 81 of the electrode rod 8 can both be arranged at the upper part, and the processing section 82 of the electrode rod 8 is arranged at the bottom end of the electrode rod 8, and the workpiece 7 is processed through the processing section 82 at the bottom end of the electrode rod 8.

[0101] Fig.13 As shown, when the electrode rod 8 needs to be removed, the lifting frame 6 drives the active rotating member 104 to move upward relative to the frame 5, so that the upper part of the electrode rod 8 is not blocked, and the worker can rotate the stud 98 outward from the V-shaped groove 95, so that the tightening spring no longer applies a tightening force to the electrode rod 8, and then adjusts the axial limit member 109 to no longer limit the axial displacement of the electrode rod 8, so that the worker can take the electrode rod 8 out upward.

[0102] The upper support 93 and the lower support 91 can be used to repeatedly position the axis of the electrode rod 8.

[0103] The upper support 93 and the lower support 91 can also be used to clamp the electrode rod 8 with two mounting sections 81 of different diameters. For example, the upper V-groove 95 and the lower V-groove 95 are staggered front and back, and the spacing of the upper and lower V-grooves 95 is calculated according to the diameters of the mounting sections 81 at both ends of the electrode rod 8, so that when the two mounting sections 81 are respectively against the inner walls of the upper and lower V-grooves 95, the axis of the electrode rod 8 is in a vertical state, and the two V-grooves are the same; or the opening angles of the upper V-groove 95 and the lower V-groove 95 are set according to the diameters of the two mounting sections 81 of the electrode rod 8, and when the electrode rod is clamped in the upper and lower V-grooves 95, the axis of the electrode rod 8 is in a vertical state.

[0104] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0105] The above is a detailed introduction to the electrode rod axis independent positioning structure of the electric spark / electrolysis machine provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the present invention and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An independent axis positioning structure for an electrode rod of an electric spark / electrolysis machine tool, comprising a frame, characterized in that: The rack is equipped with: A support assembly, on which an electrode rod is mounted, the support assembly comprising an upper support and a lower support, the upper support and the lower support being used to limit radial movement of the electrode rod; A driven rotating member is fixed on the electrode rod; An active rotating member, wherein the axis of the active rotating member and the axis of the electrode rod have two states of coincidence or non-coincidence, the active rotating member is linked to the driven rotating member through a swing arm, the axis of the active rotating member and the axis of the electrode rod are not associated and connected, the active rotating member drives the electrode rod to rotate only through the swing arm, and the positioning and clamping of the electrode rod are completed by another supporting assembly independent of the active rotating member, the swing arm has an extension length in the vertical direction, the driven rotating member is provided with a closed-loop or non-closed-loop slot, or a push arm, the swing arm rests on the inner wall of the slot or the push arm, the swing arm can freely move relative to the slot or the push arm in the axial and radial directions, and the swing arm can rotate the driven rotating member by pushing the inner wall of the slot or the push arm; The upper support and the active rotating member are connected to the same lifting frame, the lower support is fixed on the frame, the lifting frame can move up and down relative to the frame, the upper support is fixed on the lifting frame, the outer side of the upper support is sleeved with a bearing, the inner ring of the bearing is connected to the upper support, the active rotating member is a driven wheel, the driven wheel is sleeved on the bearing and connected to the outer ring, the lifting frame is provided with a driving motor, the output shaft of the driving motor is connected to a driving wheel, a transmission belt is connected between the driving wheel and the driven wheel, and the driving motor drives the active rotating member to rotate through the driving wheel.

2. The electrode rod axis independent positioning structure of the electric spark / electrolysis machine tool according to claim 1 is characterized in that: The upper and lower end surfaces of the electrode rod are provided with tapered center holes, and the upper support and the lower support are provided with ejector pins matching the shape of the center holes. The two ejector pins are respectively inserted into the center holes of the upper and lower end surfaces of the electrode rod to support the electrode rod.

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