CN216938833U

CN216938833U - Independent positioning structure for electrode bar axis of electric spark/electrolysis machine tool

Info

Publication number: CN216938833U
Application number: CN202220695677.1U
Authority: CN
Inventors: 潘旭华
Original assignee: Zhejiang Yawei Precision Machine Tool Co Ltd
Current assignee: Zhejiang Yawei Precision Machine Tool Co Ltd
Priority date: 2022-03-28
Filing date: 2022-03-28
Publication date: 2022-07-12
Anticipated expiration: 2032-03-28

Abstract

The utility model discloses an electrode bar axis independent positioning structure of an electric spark/electrolysis machine tool, which comprises a frame, wherein the frame is provided with: the electrode rod supporting device comprises a supporting assembly, a supporting assembly and a positioning assembly, wherein the supporting assembly is provided with an electrode rod and comprises an upper support and a lower support, and the upper support and the lower support are used for limiting the radial movement of the electrode rod; the driven rotating part is fixed on the electrode rod; the axis of the electrode rod is coaxial with the axis of the driving rotating part without being connected in a related manner, and the axis of the electrode rod is positioned and locked by an independent supporting component, so that the precision of the electrode rod electromachining is improved.

Description

Independent positioning structure for electrode bar axis of electric spark/electrolysis machine tool

Technical Field

The utility model relates to positioning equipment of an electrode rod, in particular to an electrode rod axis independent positioning structure of an electric spark/electrolysis machine tool, which is independent of a rotary driving structure and convenient for positioning the axis of the electrode rod.

Background

Electrical Discharge Machining (EDM), which is also called Electrical Discharge Machining or electroerosion Machining, is a process in which pulsed spark Discharge is continuously generated between a tool and a workpiece, and a metal material is eroded by using instantaneous local high temperature generated during the Discharge; the tool does not contact the workpiece during machining. The technology is widely applied to micro-machining of hard and difficult-to-machine materials such as hard alloy, die steel, quenched steel, polycrystalline diamond and the like, and can also be used for micro-machining of workpieces with low rigidity and complex shapes.

Micro electrochemical machining (electrochemical machining) refers to a machining method for obtaining a high-precision and small-size part by applying electrochemical machining within a micro machining range (1 μm to 1mm), and is widely applied to precision ultra-precision micro machining of special-shaped parts such as cylindrical parts, spline holes, internal gears, molds, valve plates and the like.

The existing wire cutting machine is generally a four-axis machine, for example, the japanese sandick slow-moving wire cutting machine AQ400LS can process a workpiece with a Ramax of 0.2-0.5 μm and a dimensional accuracy of 2 μm, but when the wire cutting machine processes an inclined plane, the UV axis for adjusting the cutting angle of the wire cutting machine has a poor processing accuracy, which is not favorable for processing, and when the cutting line of the wire cutting machine is thin, the cutting line may float and the processed surface may be uneven when the cooling liquid is cooled by impact. When the workpiece machining height is 100mm, the unevenness can reach 10 μm, and for this reason it is desirable to replace the wire cutter by an electrode bar machining tool.

In 2005, volume 32 of "spark contour machining" of the supplement to sandeck, japan, introduced a35R-E spark contour machining tool, which actually achieved machining quality with a surface roughness Ramax of 10-5 μm and a dimensional accuracy of 10-5 μm. The electric spark contour machining tool and the wire cutting machine are both produced by sandek corporation, and the technologies of various transmission parts of the machine tool, a numerical control system, the temperature control of an electric machining power supply and the like are basically consistent, but the difference of the machining quality of the electric spark contour machining tool and the machining quality of the electric machining power supply is extremely large.

Through research and comparison, the electrode bar of the electric spark contour machining tool is generally arranged on a rotating shaft, and positioning, clamping and rotary driving are all completed by the rotating shaft.

For example, a simple micro electric discharge machining/electrolytic machining spindle with publication number CN111283278A includes a power source module, a power transmission module, and an electricity leading module, where the electricity leading 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.

The problems of the existing electric spark profile processing machine tool are as follows: firstly, the electrode bar is arranged on an electric main shaft for driving rotation, the axis of the electrode bar needs to be overlapped with the axis of the electric main shaft, but when the electrode bar is assembled, the axis of the electrode bar is difficult to be overlapped with the axis of the electric main shaft, so that the machining error is enlarged.

Secondly, the electrode bar does not need to rotate because the electrode bar is not damaged in electrolytic machining, but the axis of the electrode bar is difficult to position when the electrode bar is assembled, the electrode bar needs to be detached and repaired after electrolytic machining, the axis of the repaired electrode bar needs to be repositioned, and the assembly and the positioning are difficult.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an independent positioning structure for the axis of an electrode rod of an electric spark/electrolysis machine tool, and particularly limits the radial movement of the electrode rod through an upper support and a lower support so as to position the axis of the electrode rod.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the electrode rod axis independent positioning structure of the electric spark/electrolysis machine tool comprises a frame and a supporting assembly arranged on the frame, wherein the supporting assembly is provided with an electrode rod.

The further optimization scheme of the utility model is as follows: the end faces of the upper end face and the lower end face of the electrode rod are respectively provided with a tapered central hole, the upper support and the lower support are respectively provided with a thimble matched with the shape of the central hole, and the two thimbles are respectively propped in the central holes of the upper end face and the lower end face of the electrode rod for supporting the electrode rod.

The further optimization scheme of the utility model is as follows: the upper support and the lower support comprise V-shaped grooves;

the electrode rod comprises two mounting sections for matching the upper support and the lower support and a processing section for processing, and the two mounting sections of the electrode rod are respectively leaned against the wall of the V-shaped groove of the upper support and the wall of the V-shaped groove of the lower support for positioning the axis of the electrode rod;

the upper support and the lower support comprise pressing pieces, and the pressing pieces extend into the V-shaped grooves and are used for tightly propping against the electrode rods;

the support assembly further comprises an axial limiting part, and the axial limiting part is used for limiting the axial movement of the electrode rod.

The further optimization scheme of the utility model is as follows: the compressing part comprises a transverse frame plate connected to two side walls of the V-shaped groove, a screw hole for the stud to be inserted is formed in the transverse frame plate, an extrusion end capable of elastically deforming is arranged at one end of the stud, and the extrusion end is pressed on the surface of the electrode rod.

Another subject is: the electrode bar axis independent positioning structure of the electric spark/electrolysis machine tool comprises a frame, and is characterized in that:

the electrode rod supporting device comprises a supporting assembly, a supporting assembly and a positioning assembly, wherein the supporting assembly is provided with an electrode rod and comprises an upper support and a lower support, and the upper support and the lower support are used for limiting the radial movement of the electrode rod;

the driven rotating piece is fixed on the electrode rod;

the driving rotating part is in a state of coincidence or non-coincidence with the axis of the electrode rod, the driving rotating part is linked with the driven rotating part through the swing arm, and the axis of the driving rotating part is not in associated connection with the axis of the electrode rod.

The further optimization scheme of the utility model is as follows: the upper support and the active rotating part are connected to the same lifting frame, the lower support is fixed on the rack, and the lifting frame can move up and down relative to the rack.

The further optimization scheme of the utility model is as follows: the upper support is fixed on the lifting frame, a bearing is sleeved on the outer side of the upper support, the inner ring of the bearing is connected with the upper support, the driving rotating piece is a driven wheel, the driven wheel is sleeved on the bearing and is connected with the outer ring, a driving motor is arranged on the lifting frame, an output shaft of the driving motor is connected with a driving wheel, a transmission belt is connected between the driving wheel and the driven wheel, and the driving motor drives the driving rotating piece to rotate through the driving wheel.

The further optimization scheme of the utility model is as follows: the upper and lower supports comprise V-shaped grooves;

The further optimization scheme of the utility model is as follows: the driving rotating part is connected to the lifting frame, the upper support and the lower support are fixed to the rack, and the lifting frame can drive the driving rotating part to move up and down relative to the rack.

The further optimization scheme of the utility model is as follows: the swing arm has an extension length in the vertical direction, a closed-loop or non-closed-loop slotted hole or a pushed arm is arranged on the driven rotating part, the swing arm leans against the inner wall of the slotted hole or the pushed arm, the swing arm can freely move relative to the slotted hole or the pushed arm in the axial direction and the radial direction, and the swing arm can enable the driven rotating part to rotate by pushing the inner wall of the slotted hole or the pushed arm.

Compared with the prior art, the utility model has the advantages that the radial movement of the electrode rod is limited by the upper support and the lower support so as to position the axis of the electrode rod, the axis offset of the electrode rod can be prevented, and the stability is stronger.

The driving rotating part is fixed on the driven rotating part on the electrode rod through the swing arm in a linkage mode, the axis of the driving rotating part is not in linkage connection with the axis of the electrode rod, the driving rotating part only drives the electrode rod to rotate through the swing arm, positioning and clamping of the electrode rod are completed through another supporting component independent of the driving rotating part, the axis of the electrode rod is not required to be guaranteed to coincide with the axis of the driving rotating part, and therefore the assembling accuracy of the axis of the electrode rod is improved.

Drawings

The present invention will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of illustrating the preferred embodiments and therefore should not be taken as limiting the scope of the utility model. Furthermore, unless specifically stated otherwise, the drawings are merely schematic representations based on conceptual representations of elements or structures depicted and may contain exaggerated displays and are not necessarily drawn to scale.

FIG. 1 is a first overall view of a machine tool according to an embodiment;

FIG. 2 is a second overall view of a machine tool according to an embodiment;

FIG. 3 is a first overall structure diagram of the clamping and positioning electrode rod of the upper support and the lower support according to the first embodiment;

FIG. 4 is a second overall structure diagram of the upper support and the lower support clamping positioning electrode bar in the first embodiment;

FIG. 5 is a sectional view of the upper support and the lower support chuck positioning electrode rod according to the first embodiment;

FIG. 6 is a diagram illustrating the upper support and the driving rotary member moving upward according to an embodiment;

FIG. 7 is a first drawing showing an overall configuration of a machine tool according to a second embodiment;

FIG. 8 is a second drawing showing an overall configuration of a machine tool according to a second embodiment;

FIG. 9 is the first overall structure diagram of the upper support and the lower support clamping positioning electrode rod of the second embodiment;

FIG. 10 is a second drawing showing the overall structure of the upper support and the lower support chuck-positioning electrode rod according to the second embodiment;

FIG. 11 is a connecting structure of the upper support, the lower support and the co-located holder according to the second embodiment;

FIG. 12 is a sectional view of the upper support and the lower support chuck positioning electrode rod according to the second embodiment;

FIG. 13 is a diagram illustrating the second embodiment of the present invention when the driving rotating member moves upward.

In the figure: 1. a machine tool body; 2. an X-axis displacement mechanism; 21. an X-axis motor; 22. an X-axis fixed guide rail; 23. an X-axis lead screw; 24. an X-axis movable guide rail; 3. a holder; 31. a supporting seat; 32. a positioning column; 33. a screw; 34. pressing the nut; 35. pressing a plate; 4. a Y-axis displacement mechanism; 41. a Y-axis motor; 42. a Y-axis fixed guide rail; 43. a Y-axis movable guide rail; 44. a Y-axis lead screw; 5. a frame; 51. a cross frame; 52. a column; 6. a lifting frame; 61. a Z-axis motor; 62. a Z-axis lead screw; 63. a Z-axis fixed guide rail; 64. a Z-axis movable guide rail; 7. a workpiece; 8. an electrode rod; 81. an installation section; 82. a processing section; 9. a support assembly; 91. a lower support; 92. a thimble; 93. an upper support; 94. a central bore; 95. a V-shaped groove; 96. a transverse frame plate; 97. extruding the end; 98. a stud; 100. a driven rotary member; 101. a drive motor; 102. a driving wheel; 103. a drive belt; 104. a driving rotation member; 105. a pushed arm; 106. swinging arms; 107. a bearing; 108. a co-located cage; 109. an axial stopper; 110. a horizontal support; 111. a vertical support; 112. positioning a groove; 113. a fixed seat; 114. locking the bolt; 115. a limiting long groove; 116. a polish rod; 117. an annular limiting groove; 118. a central column.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that the description is illustrative only, and is not to be construed as limiting the scope of the utility model.

It should be noted that: like reference numerals refer to like items in the following figures, and thus, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

Example one

In modern electric spark machining or electrolytic machining, a tool cathode and a workpiece anode are immersed in a working pool at the same time, pulse discharge is generated between the two poles to generate an electric erosion effect, the surface of a workpiece 7 is machined, finally, the surface shape of the workpiece 7 is matched with the shape of a working edge of the tool cathode for electric machining, the workpiece anode is the workpiece 7 to be machined and is arranged on a machine tool body 1, the workpiece 7 is connected with the anode, and the tool cathode is an electrode rod 8 which is arranged on the machine tool body 1 and is connected with the cathode.

As shown in fig. 1-6, the electric spark/electrolysis machine tool comprises a machine tool body 1, and the machine tool body 1 is provided with 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.

As shown in fig. 1 and 2, the X-axis displacement mechanism 2 includes an X-axis fixed guide rail 22 fixed on the machine tool body 1, an X-axis movable guide rail 24 and an X-axis motor 21 slidably disposed on the X-axis fixed guide rail 22, the X-axis motor 21 is fixed on the machine tool body 1, an output shaft of the X-axis motor 21 is connected to an X-axis lead screw 23, an X-axis nut is sleeved on the X-axis lead screw 23, the X-axis movable guide rail 24 is fixedly connected to the X-axis nut, the X-axis lead screw 23 is axially disposed along the X axis, and when the X-axis motor 21 drives the X-axis lead screw 23 to rotate, the X-axis lead screw 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 a displacement drive mechanism on a machine tool on the existing market.

The clamping seat 3 is fixed on the X-axis movable guide rail 24, the clamping seat 3 comprises two supporting seats 31 arranged on the left and the right, a space is formed between the two supporting seats 31, and the supporting seats 31 are fixed on the X-axis movable guide rail 24.

The supporting seat 31 is provided with a pressing plate 35 which can move up and down in the vertical direction. The supporting seat 31 is provided with a screw 33 arranged in the Z-axis direction, the pressing plate 35 is provided with a through hole for the screw 33 to pass through, the pressing plate 35 is sleeved on the screw 33 and can move up and down in the Z-axis direction, the screw 33 is sleeved with a pressing nut 34, the pressing nut 34 is positioned above the pressing plate 35, when the workpiece 7 is placed on the two supporting seats 31, the pressing nut 34 is screwed down to enable the pressing plate 35 to be tightly pressed on the workpiece 7 through the pressing nut 34, the pressing plates 35 on the two supporting seats 31 evenly press the two sides of the workpiece 7 on the upper surfaces of the two supporting seats 31 to fix the workpiece 7, and the workpiece 7 is provided with a hole or a surface to be processed.

In addition, the supporting seat 31 is provided with two positioning columns 32 arranged in the Z-axis direction, the two positioning columns 32 are located on two sides of the screw 33, the pressing plate 35 is provided with a positioning hole matched with the positioning columns 32, and the two positioning columns 32 are inserted into the positioning hole to limit the movement of the pressing plate 35 in the Z-axis direction, so that the pressing plate 35 is prevented from swinging left and right.

The Y-axis displacement mechanism 4 comprises a Y-axis fixed guide rail 42 fixed on the machine tool body 1, a Y-axis movable guide rail 43 and a Y-axis motor 41 which are arranged on the Y-axis fixed guide rail 42 in a sliding mode, the Y-axis motor 41 is fixed on the machine tool body 1, an output shaft of the Y-axis motor 41 is connected with a Y-axis lead screw 44, a Y-axis nut is sleeved on the Y-axis lead screw 44, the Y-axis movable guide rail 43 is fixedly connected with the Y-axis nut, the Y-axis lead screw 44 is arranged along the Y axis direction, and when the Y-axis motor 41 drives the Y-axis lead screw 44 to rotate, the Y-axis lead screw 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 a displacement drive mechanism on a machine tool on the existing market.

The frame 5 is fixed on the Y-axis movable guide rail 43.

As shown in fig. 3 and 4, a support assembly 9 is arranged on the frame 5, an electrode rod 8 for electric machining is mounted on the support assembly 9, the support assembly 9 includes an upper support 93 and a lower support 91, and the upper support 93 and the lower support 91 are used for limiting radial movement of the electrode rod 8, so as to position the axis of the electrode rod 8 and prevent the axis of the electrode rod 8 from shifting.

The frame 5 includes a cross frame 51 and a vertical column 52 fixed to the Y-axis moving rail 43.

The cross frame 51 extends from the Y-axis movable rail 43 in the Y-axis direction, and the lower support 91 is fixed to the cross frame 51.

The vertical column 52 is provided with a lifting frame 6 capable of moving in the Z-axis direction. Specifically, the method comprises the following steps: the vertical column 52 is fixed with a Z-axis fixed guide rail 63 and a Z-axis motor 61, the Z-axis fixed guide rail 63 is connected with a Z-axis movable guide rail 64 in a sliding manner, an output shaft of the Z-axis motor 61 is fixedly connected with a Z-axis lead screw 62, a Z-axis nut is sleeved on the Z-axis lead screw 62, the Z-axis movable guide rail 64 is fixedly connected with the Z-axis nut, the Z-axis lead screw 62 is arranged along the Z axis, when the Z-axis motor 61 drives the Z-axis lead screw 62 to rotate, the Z-axis lead screw 62 drives the Z-axis movable guide rail 64 to ascend and descend in the Z axis direction, the lifting frame 6 is fixed on the Z-axis movable guide rail 64, and the Z-axis movable guide rail 64 drives the lifting frame 6 to ascend and descend. The structure of the matched movement of the Z-axis fixed guide rail 63 and the Z-axis movable guide rail 64 is the same as that of a displacement driving mechanism on a machine tool on the existing market.

The upper support 93 is fixed on the crane 6, and the upper support 93 is positioned above the lower support 91 and opposite to the lower support 91.

The upper support 93 and the lower support 91 respectively abut against the end faces of the upper end and the lower end of the electrode rod 8 and are used for fixing the upper end and the lower end of the electrode rod 8, so that the axial movement and the radial movement of the electrode rod 8 are limited, and the axis of the electrode rod 8 is positioned.

As shown in fig. 5, the end surfaces of the upper and lower ends of the electrode rod 8 are respectively provided with a center hole 94 with a taper, the upper support 93 and the lower support 91 are respectively provided with a thimble 92 with a shape matched with the shape of the center hole 94, the taper of the center hole 94 positioned on the upper end surface of the electrode rod 8 is used as a guide edge to gather the thimble 92 of the upper support 93 on the axis of the electrode rod 8, the taper of the center hole 94 positioned on the lower end surface of the electrode rod 8 is used as a guide edge to gather the thimble 92 of the lower support 91 on the axis of the electrode rod 8, the two thimbles 92 are respectively propped against the center holes 94 on the upper and lower end surfaces of the electrode rod 8 for supporting the electrode rod 8, the thimble 92 of the upper support 93 and the thimble 92 of the lower support 91 are gradually adjusted in the process of being inserted into the center holes 94 on both ends of the electrode rod 8, the axis of the electrode rod 8 is positioned when the thimble 92 of the upper support 93 and the thimble 92 of the lower support 91 are completely inserted into the center holes 94 on both ends of the electrode rod 8, the axis of the electrode rod 8 is always on the two-point connection line of the thimble 92 of the upper support 93 and the thimble 92 of the lower support 91. The upper support 93 and the lower support 91 are used here both for limiting the axial and radial movements of the electrode rod 8 and for positioning the axis of the electrode rod 8.

The thimble 92 of the upper support 93 and the thimble 92 of the lower support 91 are only inserted into the central holes 94 at the upper and lower ends of the electrode rod 8 for positioning the axis of the electrode rod 8 and limiting the axial and radial movement of the electrode rod 8, and the thimble 92 of the upper support 93 and the thimble 92 of the lower support 91 do not have strong pressure on the electrode rod 8 in the middle and do not affect the rotation of the electrode rod 8.

Preferably, the central holes 94 at the upper and lower ends of the electrode rod 8 are in a horn shape, a cone shape or a circular truncated cone shape, and the inner walls of the central holes 94 converge toward the axis of the electrode rod 8.

The machine frame 5 is further provided with a driving rotating part 104 and a driven rotating part 100, the driven rotating part 100 is fixed on the electrode rod 8, the driving rotating part 104 and the electrode rod 8 have two states of coincidence or non-coincidence, the driving rotating part 104 is linked with the driven rotating part 100 through a swing arm 106, the driving rotating part 104 is linked with the driven rotating part 100 through the swing arm 106 when rotating, so that the driven rotating part 100 is driven to rotate, the driven rotating part 100 drives the electrode rod 8 to rotate, the axis of the driving rotating part 104 is not linked with the axis of the electrode rod 8, namely, the axis of the electrode rod 8 is not linked with the axis of the driving rotating part 104.

The driving rotating part 104 and the upper support 93 are arranged on the same lifting frame 6, the swing arm 106 is fixed on the driving rotating part 104, the swing arm 106 is eccentric to the axis of the driving rotating part 104, the swing arm 106 has an extension length in the vertical direction, a closed loop or an open loop slot hole is arranged on the driven rotating part 100, or a pushed arm 105 is arranged on the driven rotating part 100, the swing arm 106 leans against the inner wall of the slot hole or the pushed arm 105, the swing arm 106 can freely move relative to the slot hole or the pushed arm 105 in the axial direction and the radial direction, when the driving rotating part 104 drives the swing arm 106 to eccentrically rotate, the swing arm 106 leans against the inner wall of the slot hole or the pushed arm 105 to push the driven rotating part 100 to rotate, and then the electrode rod 8 is driven to rotate by the driving rotating part 100. The swing arm 106 can freely move in the axial direction and the radial direction relative to the slotted hole or by the push arm 105, so that the vibration of the driving rotating piece 104 can not be transmitted to the electrode rod 8 through the swing arm 106, the stability of the electrode rod 8 is prevented from being influenced, and the structure of the swing arm 106 can not influence the positioning of the axle center of the electrode rod 8.

Preferably, the driving rotating member 104 is a driven wheel, a bearing 107 is sleeved outside the upper support 93, the driven wheel is sleeved outside the bearing 107, an inner ring of the bearing 107 is connected with the upper support 93, an outer ring of the bearing 107 is connected with the driven wheel, a driving motor 101 is fixed on the lifting frame 6, an output shaft of the driving motor 101 is connected with a driving wheel 102, a transmission belt 103 is connected between the driving wheel 102 and the driven wheel, when the driving wheel 102 is driven by the driving motor 101 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, and the driven wheel rotates to drive the swing arm 106 to rotate eccentrically. Because the bearing 107 deflects between the inner ring and the outer ring when rotating, the axis of the active rotating element 104 deflects, so that the axis of the active rotating element 104 and the axis of the electrode rod 8 have two states of coincidence or non-coincidence.

Above-mentioned driven rotating member 100 is a lantern ring, and the lantern ring cup joints on electrode bar 8, and the lantern ring can pass through screw and electrode bar 8 fixed connection, and the lantern ring also can cup joint with electrode bar 8 tight fit.

When the electrode rod 8 is needed to perform electric machining on the workpiece 7, the driving rotating part 104 drives the swing arm 106 to eccentrically rotate, the swing arm 106 drives the driven rotating part 100 to rotate, so that the electrode rod 8 rotates, the X-axis displacement mechanism 2 and the Y-axis displacement mechanism 4 drive the rack 5 and the clamping seat 3 to relatively move on the X axis and the Y axis, so that the electrode rod 8 can machine a side with a required shape in a hole or an outer surface of the workpiece 7 to be machined, the shape of the working side of the electrode rod 8 is matched with the shape of the side machined through the electrode rod 8 on the workpiece 7, for example, the shape of the working side of the electrode rod 8 is a bevel side, and the shape of the side of the workpiece 7 machined through the electrode rod 8 is also a bevel side matched with the working side of the electrode rod 8.

As shown in fig. 6, 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 upwards relative to the frame 5, so that the upper part of the electrode rod 8 is not supported, and a worker can take out the electrode rod 8 upwards.

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

Example two

Modern electric spark machining or electrolytic machining is characterized in that a tool cathode and a workpiece anode are immersed in a machine tool simultaneously, pulse discharge between the two electrodes generates an electroerosion effect to machine the surface of a workpiece 7, finally the surface shape of the workpiece 7 is matched with the shape of a working edge of the tool cathode for electric machining, the workpiece anode is the workpiece 7 to be machined and arranged on a machine tool body 1, the workpiece 7 is communicated with the anode, and the tool cathode is an electrode rod 8 which is arranged on the machine tool body 1 and connected with the cathode.

As shown in fig. 7-13, the electric spark/electrolysis machine comprises a machine tool body 1, and the machine tool body 1 is provided with 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.

As shown in fig. 7 and 8, the X-axis displacement mechanism 2 includes an X-axis fixed guide rail 22 fixed on the machine tool body 1, an X-axis movable guide rail 24 and an X-axis motor 21 slidably disposed on the X-axis fixed guide rail 22, the X-axis motor 21 is fixed on the machine tool body 1, an output shaft of the X-axis motor 21 is connected with an X-axis lead screw 23, an X-axis nut is sleeved on the X-axis lead screw 23, the X-axis movable guide rail 24 is fixedly connected with the X-axis nut, the X-axis lead screw 23 is disposed along the X-axis direction, and when the X-axis motor 21 drives the X-axis lead screw 23 to rotate, the X-axis lead screw 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 machine tools on the existing market.

The clamping seat 3 is fixed on the X-axis movable guide rail 24, the clamping seat 3 comprises two supporting seats 31 arranged on the left and the right, a space is arranged between the two supporting seats 31, and the supporting seats 31 are fixed on the X-axis movable guide rail 24.

The supporting seat 31 is provided with a pressing plate 35 which can move up and down in the vertical direction. The supporting seat 31 is provided with a screw 33 arranged in the Z-axis direction, the pressing plate 35 is provided with a through hole for the screw 33 to pass through, the pressing plate 35 is sleeved on the screw 33 and can move up and down in the Z-axis direction, the screw 33 is sleeved with a pressing nut 34, the pressing nut 34 is positioned above the pressing plate 35, when the workpiece 7 is placed on the two supporting seats 31, the pressing nut 34 is screwed down to tightly press the pressing plate 35 on the workpiece 7, the pressing plates 35 on the two supporting seats 31 press the two sides of the workpiece 7 on the upper surfaces of the two supporting seats 31 in a pressure equalizing manner, so that the workpiece 7 is fixed, and the workpiece 7 is provided with a hole or a surface to be processed.

The Y-axis displacement mechanism 4 comprises a Y-axis fixed guide rail 42 fixed on the machine tool body 1, a Y-axis movable guide rail 43 and a Y-axis motor 41 which are arranged on the Y-axis fixed guide rail 42 in a sliding mode, the Y-axis motor 41 is fixed on the machine tool body 1, an output shaft of the Y-axis motor 41 is connected with a Y-axis lead screw 44, a Y-axis nut is sleeved on the Y-axis lead screw 44, the Y-axis movable guide rail 43 is fixedly connected with the Y-axis nut, the Y-axis lead screw 44 is arranged along the Y axis direction, and when the Y-axis motor 41 drives the Y-axis lead screw 44 to rotate, the Y-axis lead screw 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 machine tools on the existing market.

The frame 5 is fixed on the Y-axis movable guide rail 43.

As shown in fig. 9 and 10, a support assembly 9 is arranged on the frame 5, an electrode rod 8 for electric machining is mounted on the support assembly 9, the support assembly 9 includes an upper support 93 and a lower support 91, and the upper support 93 and the lower support 91 are used for limiting radial movement of the electrode rod 8, so as to position the axis of the electrode rod 8 and prevent the axis of the electrode rod 8 from shifting.

The frame 5 includes a mounting plate fixed to the top surface of the Y-axis movable rail 43, and a co-located holder 108 and the column 52 are fixed to the mounting plate.

The homothetic retainer 108 extends out from the Y-axis movable guide rail 43 along the Y-axis direction, the upper support 93 and the lower support 91 are fixed on the homothetic retainer 108, both the upper support 93 and the lower support 91 comprise V-shaped grooves 95, and the V-shaped grooves 95 of the upper support 93 and the V-shaped grooves 95 of the lower support 91 are parallel and correspond to each other in the upper and lower positions.

As shown in fig. 11, the apposition holder 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 above, the lower support 91 is fixed on the horizontal support 110 located below, positioning grooves 112 are provided on both the two horizontal supports 110, the positioning grooves 112 are V-shaped, the shapes of the upper support 93 and the lower support 91 are matched with 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 on the two horizontal supports 110 by screws. The positioning groove 112 facilitates positioning of the V-shaped grooves 95 of the upper and

lower supports

93 and 91.

As shown in fig. 12, the electrode rod 8 includes two mounting sections 81 for engaging 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, and the two mounting sections 81 of the electrode rod 8 respectively abut 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 for positioning the axis of the electrode rod 8.

The upper support 93 and the lower support 91 comprise pressing parts, and when the V-shaped grooves 95 of the upper support 93 and the V-shaped grooves 95 of the lower support 91 position the axis of the electrode rod 8, the pressing parts extend into the V-shaped grooves 95 and are used for tightly pressing the electrode rod 8, so that the radial movement of the electrode rod 8 is limited.

The compressing part comprises a transverse frame plate 96 connected to two side walls of the V-shaped groove 95, a first screw hole for the stud 98 to be inserted is formed in the transverse frame plate 96, an extrusion end 97 capable of elastic deformation is arranged at one end of the stud 98, when the stud 98 is screwed into the V-shaped groove 95, the extrusion end 97 is pressed on the surface of the electrode rod 8 to tightly push the electrode rod 8, and as the two installation sections 81 of the electrode rod 8, which are used for being matched with the upper support 93 and the lower support 91, have the same diameter, when the extrusion end 97 tightly pushes the electrode rod 8 on 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 position the axis of the electrode rod 8, so that the radial movement of the electrode rod 8 is limited.

Preferably, the pressing end 97 is a pressing spring, and the elastic force of the pressing spring presses the electrode rod 8 against both side walls of the V-shaped groove 95. The jacking force of the jacking spring can be adjusted by screwing in or out the stud 98, and the jacking spring only provides jacking force for the electrode rod 8, but does not influence the rotation of the electrode rod 8.

The support assembly 9 further comprises an axial stop 109, the axial stop 109 being adapted to limit the axial movement of the electrode rod 8. The electrode rod 8 is provided with an annular limiting groove 117, the axial limiting piece 109 is fixed on the co-located retainer 108, the axial limiting piece 109 is inserted into the annular limiting groove 117 to limit the axial movement of the electrode rod 8, and the width of the axial limiting piece 109 is equal to the width of the annular limiting groove.

Preferably, the axial position-limiting member 109 is a polish rod 116, the fixed seat 113 is fixed on the apposition holder 108, the fixed seat 113 has a through hole for the polish rod 116 to pass through, the through hole faces the annular position-limiting groove 117 on the electrode rod 8, the polish rod 116 passes through the through hole and is inserted into the annular position-limiting groove 117 of the electrode rod 8, the polish rod 116 is provided with a position-limiting long groove 115 extending along the length direction, the fixed seat 113 is provided with a second screw hole, the second screw hole is communicated with the through hole, a locking bolt 114 is screwed in the second screw hole, the locking bolt 114 is inserted into the position-limiting long groove 115 to limit the polish rod 116 to move on the Y axis, and when the polish rod 116 needs to be locked, the locking bolt 114 is screwed downwards to press the polish rod 116 against the inner wall of the through hole to be locked. The position of the polish rod 116 can be adjusted by the locking bolt 114 to fit electrode rods 8 of different diameters. The polished rod 116 is inserted into the annular limiting groove 117, so that the rotation of the electrode rod 8 is not influenced.

The column 52 is provided with a crane 6 movable in the Z-axis direction. Specifically, the method comprises the following steps: the vertical column 52 is fixed with a Z-axis fixed guide rail 63 and a Z-axis motor 61, the Z-axis fixed guide rail 63 is connected with a Z-axis movable guide rail 64 in a sliding manner, an output shaft of the Z-axis motor 61 is fixedly connected with a Z-axis lead screw 62, a Z-axis nut is sleeved on the Z-axis lead screw 62, the Z-axis movable guide rail 64 is fixedly connected with the Z-axis nut, the Z-axis lead screw 62 is arranged along the Z axis, when the Z-axis motor 61 drives the Z-axis lead screw 62 to rotate, the Z-axis lead screw 62 drives the Z-axis movable guide rail 64 to ascend and descend in the Z axis direction, the lifting frame 6 is fixed on the Z-axis movable guide rail 64, and the Z-axis movable guide rail 64 drives the lifting frame 6 to ascend and descend. The structure of the matched movement of the Z-axis fixed guide rail 63 and the Z-axis movable guide rail 64 is the same as that of a displacement driving mechanism on a machine tool on the existing market.

The driving rotating member 104 is arranged on the lifting frame 6, the swing arm 106 is fixed on the driving rotating member 104, the swing arm 106 is eccentric to the axis of the driving rotating member 104, the swing arm 106 has an extension length in the vertical direction, a closed loop or an open loop slot is arranged on the driven rotating member 100, or a pushed arm 105 is arranged on the driven rotating member 100, the swing arm 106 leans against the inner wall of the slot or the pushed arm 105, the swing arm 106 can freely move relative to the slot or the pushed arm 105 in the axial direction and the radial direction, when the driving rotating member 104 drives the swing arm 106 to eccentrically rotate, the swing arm 106 leans against the inner wall of the slot or the pushed arm 105 to push the driven rotating member 100 to rotate, and then the electrode rod 8 is driven to rotate from the driving rotating member 100. The swing arm 106 can move freely in the axial direction and the radial direction relative to the slotted hole or by the push arm 105, so that the vibration of the driving rotating piece 104 can not be transmitted to the electrode rod 8 through the swing arm 106, the stability of the electrode rod 8 is prevented from being influenced, and the structure of the swing arm 106 can not influence the positioning of the axis of the electrode rod 8.

Preferably, the driving rotating member 104 is a driven wheel, a center post 118 is fixed on the lifting frame 6, a bearing 107 is sleeved on the outer side of the center post 118, the driven wheel is sleeved outside the bearing 107, the inner ring of the bearing 107 is connected with the center post 118, the outer ring of the bearing 107 is connected with the driven wheel, a driving motor 101 is fixed on the lifting frame 6, an output shaft of the driving motor 101 is connected with a driving wheel 102, a transmission belt 103 is connected between the driving wheel 102 and the driven wheel, when the driving wheel 102 is driven by the driving motor 101 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, and the driven wheel rotates to drive the swing arm 106 to rotate eccentrically. The inner and outer rings of the bearing 107 will deflect when rotating, so that the axis of the active rotating member 104 will deflect, and the active rotating member 104 and the electrode rod 8 will have two states of coincidence or non-coincidence.

Two sections of installation sections 81 of the electrode rod 8 can be arranged at the upper end and the lower end of the electrode rod 8, a processing section 82 of the electrode rod 8 is arranged in the middle, and the workpiece 7 is processed through the middle electrode rod 8; the two sections of the mounting sections 81 of the electrode rod 8 can be arranged at the upper part, 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.

As shown in fig. 13, when the electrode rod 8 needs to be removed, the lifting frame 6 drives the driving rotating member 104 to move upward relative to the frame 5, so that the upper part of the electrode rod 8 is not blocked, a worker can screw the stud 98 out of the V-shaped groove 95, so that the jacking spring does not exert jacking force on the electrode rod 8, and then the axial limiting member 109 is adjusted to not limit the axial displacement of the electrode rod 8, so that the worker can take out the electrode rod 8 upward.

The upper support 93 and the lower support 91 can also be used for clamping the electrode rods 8 with different diameters of the two mounting sections 81, for example: the V-shaped groove 95 positioned above and the V-shaped groove 95 positioned below are arranged in a staggered manner from front to back, and the staggered distance between the upper V-shaped groove 95 and the lower V-shaped groove 95 is calculated according to the diameters of the mounting sections 81 at the two ends of the electrode rod 8, so that when the two mounting sections 81 are respectively leaned against the inner walls of the upper V-shaped groove 95 and the lower V-shaped groove 95, the axis of the electrode rod 8 is in a vertical state, and the two V-shaped grooves are the same; or the opening angles of the upper V-shaped groove 95 and the lower V-shaped 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 V-shaped groove 95 and the lower V-shaped groove 95, the axis of the electrode rod 8 is in a vertical state.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "inner", "outer", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that are usually placed when the products of the present invention are used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The above description is provided in detail for the independent positioning structure of the electrode rod axis of the electric spark/electrolysis machine tool, and the principle and the implementation of the present invention are explained by applying specific examples, and the description of the above embodiments is only provided to help understanding the present invention and the core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. The electrode rod axis independent positioning structure of the electric spark/electrolysis machine tool comprises a frame and a supporting assembly arranged on the frame, wherein the supporting assembly is provided with an electrode rod.

2. The structure for independently positioning the axial center of an electrode rod for an electric spark/electrolysis machine as claimed in claim 1, wherein the upper and lower ends of the electrode rod are provided with tapered center holes, the upper and lower supports are provided with ejector pins having a shape matching the center holes, and the two ejector pins are respectively abutted against the center holes of the upper and lower ends of the electrode rod for supporting the electrode rod.

3. The electric spark/electrolysis machine tool electrode rod axial center independent positioning structure according to claim 1, wherein the upper support and the lower support comprise V-shaped grooves;

4. The structure for independently positioning the axial center of an electrode rod of an electric spark/electrolysis machine according to claim 3, wherein the pressing member comprises a cross frame plate connected to both side walls of the V-shaped groove, the cross frame plate is provided with a screw hole for inserting the stud, one end of the stud is provided with an elastically deformable pressing end, and the pressing end presses against the surface of the electrode rod.

5. The electrode bar axis independent positioning structure of the electric spark/electrolysis machine tool comprises a frame, and is characterized in that: the electrode rod supporting device comprises a supporting assembly, a supporting assembly and a positioning assembly, wherein the supporting assembly is provided with an electrode rod and comprises an upper support and a lower support, and the upper support and the lower support are used for limiting the radial movement of the electrode rod;

the driven rotating part is fixed on the electrode rod;

6. The structure for independently positioning the axial center of an electrode rod for an electric spark/electrolysis machine as claimed in claim 5, wherein the upper and lower ends of the electrode rod are provided with tapered center holes, the upper and lower supports are provided with ejector pins having a shape matching the center holes, and the two ejector pins are respectively abutted against the center holes of the upper and lower ends of the electrode rod for supporting the electrode rod.

7. The electric spark/electrolysis machine tool electrode rod axis independent positioning structure according to claim 6, characterized in that 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.

8. The electric spark/electrolysis machine tool electrode bar axis independent positioning structure as claimed in claim 7, wherein the upper support is fixed on the lifting frame, a bearing is sleeved outside the upper support, an inner ring of the bearing is connected with the upper support, the driving rotating member is a driven wheel, the driven wheel is sleeved on the bearing and connected with an outer ring, the lifting frame is provided with a driving motor, an output shaft of the driving motor is connected with a driving wheel, a transmission belt is connected between the driving wheel and the driven wheel, and the driving motor drives the driving rotating member to rotate through the driving wheel.

9. The electric spark/electrolysis machine tool electrode rod axial center independent positioning structure according to claim 5, wherein the upper support and the lower support comprise V-shaped grooves;

10. The electric spark/electrolysis machine tool electrode rod axis independent positioning structure according to claim 9, wherein the active rotating member is connected to a 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.

11. The electric spark/electrolysis machine tool electrode bar axis independent positioning structure according to claim 5, wherein the swing arm has an extension length in a vertical direction, the driven rotating member is provided with a closed-loop or non-closed-loop slot hole, or a pushed arm, the swing arm leans against an inner wall of the slot hole or the pushed arm, the swing arm can freely move relative to the slot hole or the pushed arm in an axial direction and a radial direction, and the swing arm can rotate the driven rotating member by pushing the inner wall of the slot hole or the pushed arm.