CN115255523B - Six-axis linkage electric spark forming machine tool - Google Patents
Six-axis linkage electric spark forming machine tool Download PDFInfo
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- CN115255523B CN115255523B CN202211186826.2A CN202211186826A CN115255523B CN 115255523 B CN115255523 B CN 115255523B CN 202211186826 A CN202211186826 A CN 202211186826A CN 115255523 B CN115255523 B CN 115255523B
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- 238000010892 electric spark Methods 0.000 title claims abstract description 15
- 230000008093 supporting effect Effects 0.000 claims description 49
- 238000007789 sealing Methods 0.000 claims description 35
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 27
- 229910052799 carbon Inorganic materials 0.000 claims description 27
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 23
- 229910052802 copper Inorganic materials 0.000 claims description 23
- 239000010949 copper Substances 0.000 claims description 23
- 239000007788 liquid Substances 0.000 claims description 18
- 238000003754 machining Methods 0.000 claims description 15
- 230000033001 locomotion Effects 0.000 claims description 13
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000009760 electrical discharge machining Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 13
- 239000012530 fluid Substances 0.000 description 12
- 230000008569 process Effects 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 5
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- 230000009471 action Effects 0.000 description 4
- 239000012224 working solution Substances 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H1/00—Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
Abstract
The utility model relates to a digit control machine tool technical field especially relates to a six-axis linkage electric spark forming machine tool. The six-axis linkage electric spark forming machine tool comprises a base assembly, an electrode assembly and a connecting assembly suitable for connecting the base assembly and the electrode assembly; the base assembly comprises a base body and a workpiece rotary table, and the workpiece rotary table is rotatably connected with the base body; through the connecting component, the electrode assembly can move along three directions which are vertical to each other, and is matched with the linkage of the three rotating shafts, so that the six-shaft linkage processing of workpieces can be realized, and the processing of complex space curved surface workpieces is facilitated; the electrode assembly includes a clamp assembly adapted to hold an electrode and a mount that allows the electrode to be moved to a desired position to machine complex spatial surfaces of a workpiece.
Description
Technical Field
The utility model relates to a digit control machine tool technical field especially relates to a six-axis linkage electric spark forming machine tool.
Background
In recent years, with rapid development in the fields of energy sources, compressors and the like, key workpieces such as large-sized space curved surfaces are increasing. Such workpieces are key parts of engines and large compressors. However, because of complex structure, many spatial curved surfaces and high precision requirement, the common three-axis, four-axis and even five-axis machine tool can adjust the electrode along multiple directions, but can not ensure that the curved surface structure formed by the adjusting path of the electrode completely conforms to the expected curved surface structure of the workpiece, and the linkage matching degree of the machine tool rotating shaft is low. In the process of machining a workpiece, the machining angle of the workpiece needs to be adjusted for multiple times by using the existing machine tool, the workpiece with an expected curved surface structure cannot be directly obtained, the machining precision of the workpiece cannot be guaranteed due to the fact that the machining angle of the workpiece is adjusted for multiple times, and the requirement for one-step forming of the workpiece is difficult to meet.
Disclosure of Invention
To solve the technical problem or at least partially solve the technical problem, the present disclosure provides a six-axis linkage electric discharge machine.
The present disclosure provides a six-axis linkage electric discharge machining tool comprising a base assembly, an electrode assembly, and a connecting assembly adapted to connect the base assembly and the electrode assembly, wherein,
the base assembly comprises a base body and a workpiece rotary table, the workpiece rotary table is rotatably connected with the base body, and the electrode assembly and the workpiece rotary table are oppositely arranged;
the connecting assembly is suitable for enabling the electrode assembly to have freedom degrees of movement relative to the base body along a first direction, a second direction and a third direction respectively, wherein the first direction is perpendicular to the second direction, the third direction is perpendicular to a plane where the first direction and the second direction are located, and the third direction is a vertical direction;
electrode subassembly is including being suitable for anchor clamps subassembly and the mount pad of centre gripping electrode, the mount pad with coupling assembling rotates to be connected, the rotation center line of mount pad with the third direction is perpendicular, anchor clamps subassembly with the mount pad rotates to be connected, the mount pad drive anchor clamps subassembly rotates around self axis and predetermines the angle.
Optionally, two first supporting portions are arranged on two sides of the base body, and the two first supporting portions are arranged at intervals and are suitable for being slidably connected with two ends of the connecting assembly;
and a second supporting part is arranged between the two first supporting parts, and one end of the second supporting part, which is far away from the workpiece rotary table, protrudes out of the end part of the first supporting part along the first direction.
Optionally, coupling assembling includes along the first direction with first supporting part with second supporting part sliding connection's walking beam, one side of walking beam is stepped structure, stepped structure includes a plurality of step portions, wherein, at least one be provided with guide rail assembly on the step portion, at least one be provided with lead screw assembly on the step portion, lead screw assembly's one end is provided with and is used for the drive the first driver part of lead screw assembly motion.
Optionally, the connecting assembly further includes a ram, and the ram is connected to the movable beam along the second direction in a sliding manner through the guide rail assembly and the lead screw assembly.
Optionally, the connection assembly further includes a column adapted to mount the electrode assembly, the column being slidably connected to the ram along the third direction.
Optionally, the connection assembly further includes a first turntable, the electrode assembly is rotatably connected to the column through the first turntable, and a rotation center line of the first turntable is parallel to the first direction.
Optionally, a second rotary table is embedded in the mounting seat, a rotary joint is arranged on the second rotary table, a hollow connecting part is arranged between the second rotary table and the clamp assembly, an air pump is further arranged on the mounting seat, a pneumatic pipeline is arranged in the center of the connecting part in a penetrating mode, one end of the pneumatic pipeline is connected with the clamp assembly, the other end of the pneumatic pipeline is connected with the rotary joint, and the rotary joint is connected with the air pump through a pipeline.
Optionally, the outer periphery of the connecting component is provided with a carbon brush, the carbon brush comprises a carbon brush ring, the carbon brush ring is installed on the shell of the second rotary table, a plurality of automatic jacking devices distributed along the circumference are arranged in the carbon brush ring, each automatic jacking device comprises a copper seat, an elastic piece and a copper block, the copper seats are fixedly arranged in the carbon brush ring, the elastic pieces are installed between the copper blocks, and the copper blocks are abutted against the outer periphery of the connecting component.
Optionally, a working fluid bath is arranged on the base body, the workpiece rotary table is arranged in the working fluid bath, the workpiece rotary table comprises a bearing table body, a rotating shaft and a second driving part suitable for driving the rotating shaft to rotate, a sealing cover is arranged on the outer peripheral side of the rotating shaft, the rotating shaft is in sealing connection with the sealing cover, and the edge of the sealing cover, which is far away from the rotating shaft, is in sealing connection with the base body;
the sealing cover and the base body are formed with a cavity, an oil guide structure is arranged in the cavity, and at least part of the oil guide structure is correspondingly arranged at the connecting position of the rotating shaft and the sealing cover.
Optionally, still include tool setting appearance and flexible subassembly, the tool setting appearance passes through flexible subassembly with first supporting part is connected.
According to the six-axis linkage electric spark forming machine tool, the connecting assembly is arranged, so that the electrode assembly can move along the first direction and the second direction which are perpendicular to each other and the third direction which is vertical to each other, and the six-axis linkage processing of the workpiece can be realized by the electrode by matching with the linkage of three rotating shafts of the machine tool in the processing process of the workpiece, so that the processing of the workpiece with a complicated space curved surface is facilitated; and the rotation preset angle of the electrode can be realized by arranging the clamp assembly to be rotationally connected with the mounting seat, so that the electrode can be processed at a proper angle on a space curved surface to be processed, namely, the entry point of the electrode can be adjusted, and the processing which is realized by the rotation of the electrode can be completed. The six-axis linkage system is formed by the arrangement of the structure, so that the electrodes can move and rotate to required positions to process each complex space curved surface of the workpiece, the processing difficulty is reduced, the processing precision of the workpiece can be ensured, and the requirement of one-step forming of the workpiece is met.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a schematic structural view of a six-axis linkage EDM machine according to an embodiment of the disclosure;
FIG. 2 is a schematic structural diagram of a base body of a six-axis linkage EDM machine according to an embodiment of the disclosure;
FIG. 3 is a schematic structural view of a movable beam of the six-axis linkage electric discharge machine according to the embodiment of the present disclosure;
FIG. 4 is a side view of a movable beam of a six-axis linkage EDM machine according to an embodiment of the disclosure;
FIG. 5 is a schematic structural view of a ram of a six-axis linkage EDM machine according to an embodiment of the disclosure;
FIG. 6 is a schematic structural diagram of a column of a six-axis linkage EDM machine according to an embodiment of the present disclosure;
FIG. 7 is a schematic structural view of a column and a first turntable of a six-axis linkage EDM machine according to an embodiment of the disclosure;
FIG. 8 is a schematic structural view of a mounting base and a second turntable of a six-axis linkage EDM machine according to an embodiment of the disclosure;
FIG. 9 is a schematic structural view of a clamp assembly of a six-axis linkage EDM machine according to an embodiment of the present disclosure;
FIG. 10 is a front view of a second turret and clamp assembly of a six axis linked EDM machine according to an embodiment of the present disclosure;
FIG. 11 is a cross-sectional view of a carbon brush ring of a six-axis linked EDM machine according to an embodiment of the present disclosure;
FIG. 12 is a schematic structural view of a workpiece turret of a six-axis linkage EDM machine according to an embodiment of the disclosure;
FIG. 13 is a cross-sectional view of a base body and a working fluid tank of a six-axis linkage EDM machine tool according to an embodiment of the disclosure
FIG. 14 is a schematic structural view of a working fluid tank of a six-axis linkage EDM machine according to an embodiment of the disclosure;
FIG. 15 is a schematic view of a sealing structure between a working fluid bath portion and a workpiece rotary table of a six-axis linkage EDM machine according to an embodiment of the disclosure;
FIG. 16 is a front view of a liquid level limiter of a workpiece turret of a six axis linked EDM machine according to an embodiment of the present disclosure;
fig. 17 is a schematic structural view of a tool setting gauge and a telescopic member of a six-axis linkage electric discharge machine according to an embodiment of the present disclosure.
Wherein, 1, a base component; 11. a base body; 12. a workpiece rotary table; 13. a first support section; 14. a second support portion; 15. a sealing cover; 16. an oil guiding structure; 17. a rotary joint; 18. a liquid level restriction; 2. an electrode assembly; 21. a clamp assembly; 22. a mounting seat; 23. a second turntable; 24. an air pump; 25. a pneumatic line; 26. a connecting member; 3. a connecting assembly; 31. a movable beam; 311. a rear tail; 32. a ram; 321. a slider; 322. a slider mounting surface; 33. a column; 331. a slide rail; 34. a first turntable; 35. mounting grooves; 4. tool setting gauge; 5. a telescopic assembly; 51. moving the support; 52. a rodless cylinder; 53. a speed regulating device; 6. a carbon brush; 61. a carbon brush ring; 62. an automatic jacking device; 7. a working fluid bath body; 8. a lift gate assembly; 9. A guide rail assembly; 10. a lead screw assembly; 20. and an air blowing member.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.
The six-axis linked electric discharge machine will be described in detail below by way of specific examples: as shown in fig. 1 to 16, the present embodiment provides a six-axis linked electric discharge machining apparatus including a base assembly 1, an electrode assembly 2, and a connecting assembly 3 adapted to connect the base assembly 1 and the electrode assembly 2, wherein,
the base assembly 1 comprises a base body 11 and a workpiece rotary table 12, the workpiece rotary table 12 is rotatably connected with the base body 11, and the electrode assembly 2 is arranged opposite to the workpiece rotary table 12, and can be specifically arranged above the workpiece rotary table 12.
The connection assembly 3 is adapted to provide the electrode assembly 2 with freedom of movement relative to the base body 11 in a first direction, a second direction and a third direction, respectively, wherein the first direction is perpendicular to the second direction, the third direction is perpendicular to a plane in which the first direction and the second direction lie, and the third direction is a vertical direction. The first direction may be considered to be along the X-axis direction, the second direction along the Y-axis direction, and the third direction along the Z-axis direction.
The electrode assembly 2 comprises a clamp assembly 21 and a mounting seat 22, wherein the clamp assembly 21 is suitable for clamping an electrode, the mounting seat 22 is rotatably connected with the connecting assembly 3, the rotating center line of the mounting seat 22 is perpendicular to the third direction, and the clamp assembly 21 is rotatably connected with the mounting seat 22. A workpiece to be machined is placed on the workpiece rotary table 12, the electrode assembly 2 is enabled to move along a first direction, a second direction and a third direction by adjusting the connecting assembly 3, and the electrode can reach a required position on the workpiece to be machined by matching with the rotation of the workpiece rotary table 12; the installation seat 22 is rotatably connected with the connecting assembly 3, and the rotation center line of the installation seat 22 is parallel to the first direction, so that the electrode assembly 2 can be rotated to a required position to process each complex space curved surface of a workpiece; by arranging the clamp assembly 21 to be rotatably connected with the mounting seat 22, the electrode can be rotated by a preset angle, such as 10 degrees and 15 degrees, so that the machining can be performed on a curved surface of a space to be machined at a proper angle.
The workpiece rotary table 12 is rotatably connected with the base body 11, specifically, a bearing is arranged on the base body 11 opposite to the electrode assembly 2, the bearing penetrates through the base body 11 and is connected with the base body 11, the upper end of the bearing is connected with the workpiece rotary table 12, and a direct drive motor is adopted to drive the bearing to rotate, so that the workpiece rotary table 12 is driven to rotate, a workpiece on the workpiece rotary table 12 is rotated, the structure is simple and stable, errors are not easy to generate, and high repeated positioning accuracy can be ensured; by controlling the rotation degree of the direct drive motor, very high positioning accuracy can be ensured.
The bearing may be made of a high strength material, and the diameter of the bearing may be increased within a suitable range to reduce the stress per unit area under the same load, so that the workpiece turret 12 can bear a heavy weight; the direct drive motor can provide higher rotating speed, and the time for driving the workpiece to rotate to a required position is shorter, so that the non-processing time is reduced, and the production efficiency is improved.
In some embodiments, a worm wheel and a worm are arranged on the base body 11, the worm wheel is parallel to the plane of the base body 11, the top surface of the worm wheel is connected with the workpiece turntable 12, threads on the worm are meshed with a gear on the worm wheel, the rotation of the worm wheel can be driven by the rotation of the worm, and the rotation of the worm wheel drives the workpiece turntable 12 to rotate. The worm wheel and the worm are stably driven, and damage to the workpiece caused by instability of the workpiece rotary table 12 when the workpiece is machined is avoided. The diameter of the worm gear is equal to the diameter of the workpiece turret 12, providing more stable support for the workpiece turret 12.
In some embodiments, a roller and a cam are disposed on the base body 11, the roller is parallel to the plane of the base body 11, the top surface of the roller is connected to the workpiece turntable 12, needle bearings circumferentially distributed on the outer side of the roller can be inserted into the spaces between the thread-shaped protrusions on the cam and rotate, the rotation of the cam can drive the roller to rotate, and the rotation of the roller drives the workpiece turntable 12 to rotate. The roller is contacted with the cam in a rolling mode, is conducted in a flowing mode, has smaller friction and high conduction efficiency, and can rotate a workpiece with larger load mass under the same output power; the friction between the roller and the cam is small, the generated heat is less, on one hand, the thermal deflection is not generated, and the positioning precision is improved; on the other hand, even under high-speed operation, the generated heat is not enough to affect the operation, so that the workpiece rotary table 12 can rotate at a higher speed, the time for driving the workpiece to rotate to a required position is shorter, and the working efficiency is improved.
As shown in fig. 2, the base body 11 is provided with two first supporting portions 13 and a second supporting portion 14 disposed between the two first supporting portions 13, the two first supporting portions 13 are disposed at an interval and are adapted to be slidably connected to two ends of the connecting assembly 3, and the second supporting portion 14 is adapted to be slidably connected to a middle portion of the connecting assembly 3. The two first supporting portions 13 are plate bodies located on two sides of the base body 11 parallel to the first direction, and the length direction of the first supporting portions 13 is parallel to the first direction. The two first supporting portions 13 are adapted to be slidably connected to two ends of the connecting assembly 3, specifically, the top ends of the two first supporting portions 13 are both provided with the guide rail assembly 9 along the first direction, and two ends of the connecting assembly 3 are respectively slidably connected to the guide rail assembly 9, so that the connecting assembly 3 can move on the guide rail assembly 9 along the first direction.
The second supporting portion 14 is a plate body parallel to the first direction in the length direction, the second supporting portion 14 is located in the middle of the base body 11, three-point support is formed by the second supporting portion 14 and the two first supporting portions 13, firmer support is provided for the connecting assembly 3, and the six-axis linkage electric spark forming machine tool can still be guaranteed to have higher rigidity under the condition that the base body 11 has a larger span in the second direction.
The second supporting portion 14 is adapted to be slidably connected to a middle portion of the connecting assembly 3, and specifically, two guide rail assemblies 9 are disposed at intervals along the second direction on a top end of the second supporting portion 14, the two guide rail assemblies 9 may be respectively located on two sides of the top end of the second supporting portion 14, and the middle portion of the connecting assembly 3 is slidably connected to the two guide rail assemblies 9 respectively. The top of second supporting part 14, the centre of two guide rail set spare 9 is provided with servo motor and the lead screw subassembly 10 that sets up along the first direction, and the drive division of lead screw subassembly 10 is connected with coupling assembling 3, is provided with servo motor in one side of lead screw subassembly 10, drives lead screw subassembly 10 through servo motor and rotates to can drive coupling assembling 3 and follow the motion of first direction.
Above-mentioned screw subassembly 10 can be high accuracy ball, drives high accuracy ball through servo motor and works, and servo motor can turn into torque and rotational speed with the rotation of drive high accuracy ball with voltage signal, and high accuracy ball can turn into the linear motion of transmission part with the rotary motion of lead screw to drive coupling assembling 3 and follow the first direction motion. The friction resistance is very small when the ball moves, so that the friction loss of the high-precision ball screw is small, and the transmission efficiency is high; the high-precision ball screw has extremely small starting torque, can ensure to realize precise micro-advancing and micro-retreating and has high positioning precision; the axial clearance between the screw and the ball is very small, and the axial transmission precision and the axial rigidity are high. The servo motor can control the running speed according to the electric signal, so that the running speed is ensured, and meanwhile, the accurate position precision is obtained.
Specifically, one end of the second supporting portion 14, which is far away from the workpiece rotating table 12, protrudes out of the end of the first supporting portion 13 along the first direction, so that the supporting effect of a supporting structure formed by the first supporting portion 13 and the second supporting portion 14 on the connecting assembly 3 in the first direction is improved, and the supporting of the connecting assembly 3 is more stable.
Of course, the two first supporting portions 13 may be oppositely disposed on the base body 11, and the two first supporting portions 13 form a gantry structure to support the connecting assembly 3.
As shown in fig. 3 and 4, the connecting assembly 3 includes a walking beam 31 slidably connected to the base body 11 along the first direction, one side of the walking beam 31 is a stepped structure, the stepped structure includes a plurality of steps, at least one step is provided with a guide rail assembly 9, at least one step is provided with a lead screw assembly 10, and one end of the lead screw assembly 10 is provided with a first driving part for driving the lead screw assembly 10 to move.
The movable beam 31 may be a cast lightweight beam to reduce the weight of the movable beam 31. The movable beam 31 capable of moving along the first direction is arranged to drive the connecting assembly 3 to move along the first direction, so that the electrode assembly 2 connected to the connecting assembly 3 has a degree of freedom to move along the first direction relative to the base body 11.
Specifically, the stepped structure on one side of the movable beam 31 may include three steps, a guide rail assembly 9 is fixed on two steps on two sides along the second direction, a screw assembly 10 is arranged on the middle step along the second direction, a first driving part for driving the screw assembly 10 is arranged at one end of the screw assembly 10, specifically, the first driving part may be a servo motor, and the screw assembly 10 may be a high-precision ball screw.
Specifically, the middle of the lower portion of the movable beam 31 is provided with a rear tail 311, the rear tail 311 abuts against the second supporting portion 14, when the movable beam 31 moves to the rear portion of the first supporting portion 13, the rear tail 311 abuts against a portion, exceeding the first supporting portion 13, of the second supporting portion 14 in the length direction, support is provided for the movable beam 31, and deformation of the connecting assembly 3 in the first direction due to large overhang is reduced.
As shown in fig. 5, the connecting assembly 3 further includes a ram 32, and the ram 32 is slidably connected to the movable beam 31 in the second direction through the guide rail assembly 9 and the lead screw assembly 10. Specifically, the ram 32 is arranged on one side of the movable beam 31 far away from the rear tail 311; by providing the ram 32 movable in the second direction, it is achieved that the electrode assembly 2 connected to the connection assembly 3 has a degree of freedom of movement in the second direction with respect to the base body 11. The guide rail assembly 9 is slidably connected with the ram 32, and the ram 32 moves along the second direction through the guide rail assembly 9, so that the movement of the ram 32 is restrained and guided. The screw assembly 10 can ensure higher positioning precision and transmission speed and improve the integral rigidity of the machine tool. By providing a plurality of steps on the inclined surface, the ram 32 slidably connected to each step is restrained in the first direction and the third direction, so that the amount of deformation variation in the first direction and the third direction is reduced when the ram 32 moves in the second direction. The rear side of the ram 32 may be provided with depressions corresponding to the plurality of protrusions on the movable beam 31, so that the ram 32 and the movable beam 31 are more attached.
As shown in fig. 6, the connection assembly 3 further includes a column 33 adapted to mount the electrode assembly 2, and the column 33 is slidably connected to the ram 32 in the third direction. The pillar 33 capable of moving in the third direction is arranged to drive the connecting assembly 3 to move in the third direction, so that the electrode assembly 2 connected to the connecting assembly 3 has a degree of freedom of movement in the third direction relative to the base body 11.
In some embodiments, the upright 33 is provided with a slide rail assembly, wherein the slide rail 331 of the slide rail assembly is adapted to be connected with the upright 33, and the slide block 321 of the slide rail assembly is adapted to be connected with the ram 32. Specifically, two slide rails 331 along the third direction are disposed at an interval on one side of the upright column 33 close to the ram 32; one side of the ram 32 close to the upright column 33 is provided with mutually parallel sliding block mounting surfaces 322 which are suitable for being connected with the sliding blocks 321, the two sliding blocks 321 can move on the sliding rail 331 along the third direction, and the sliding blocks 321 are matched with the sliding rail 331, so that the larger stroke of the upright column 33 is realized. The slide rail 331 is provided with a slide rail clamp for preventing the column 33 from falling suddenly and damaging the electrode due to an emergency such as power failure or gas failure.
A screw rod assembly 10 and a servo motor are arranged between two sliding block mounting surfaces 322 on the ram 32, a transmission part of the screw rod assembly 10 is connected with the upright post 33, and the servo motor drives the screw rod assembly 10 to rotate so as to drive the upright post 33 to move along a third direction.
As shown in fig. 7, the connection assembly 3 further includes a first turntable 34, and the electrode assembly 2 is rotatably connected to the column 33 through the first turntable 34, and a rotation center line of the first turntable 34 is parallel to the first direction. Specifically, the first rotary table 34 is arranged at the lower part of the upright column 33, and by arranging the first rotary table 34 at the lower part of the upright column 33, the electrode assembly 2 connected with the first rotary table 34 can machine a spatial curved surface close to the workpiece rotary table 12, and a larger machining area is realized. The first turntable 34 includes a bearing and a turntable, and the first turntable 34 is rotatable with a direction parallel to the first direction as a rotation center line. One end of the bearing is connected with the upright column 33, the other end of the bearing is connected with the rotary table, and the rotary table is arranged outside the upright column 33. The bearing is driven to rotate through the direct drive motor, the rotary table on the bearing is driven to rotate, the structure is simple and stable, errors are not easy to generate, very high repeated positioning accuracy can be guaranteed, and the degree of rotation of the direct drive motor is controlled, so that very high positioning accuracy can be guaranteed. Thereby, the first turntable 34 can be rotated with the first direction as the rotation center line, and the electrode assembly 2 connected to the first turntable 34 is rotated with the parallel direction of the first direction as the rotation center line.
In some embodiments, the first turntable 34 includes a worm wheel, a worm, and a turntable, the worm wheel is located on a plane perpendicular to the first direction, the turntable is attached to a side of the worm wheel away from the column 33, threads on the worm are engaged with a gear on the worm wheel, rotation of the worm wheel is driven by rotation of the worm, and the turntable is driven by rotation of the worm wheel. The structure is compact, the length in the first direction is only the sum of the thicknesses of the worm wheel and the rotary table, and the space is saved.
In some embodiments, the first turntable 34 comprises a roller, a cam and a turntable, the roller is located on a plane perpendicular to the first direction, the turntable is attached to a side of the roller away from the column 33, needle bearings circumferentially distributed on the outer side of the roller can be inserted into the spaces between the thread-shaped protrusions on the cam and rotate, the rotation of the roller can be driven by the rotation of the cam, and the rotation of the roller drives the turntable to rotate. The roller contacts with the cam in a rolling mode, and the positioning precision is high.
As shown in fig. 6 and 7, the end of the pillar 33 is provided with a mounting groove 35 for mounting the first turntable 34. The mounting groove 35 may be a cylindrical groove having a diameter equal to that of the bearing, and the mounting groove 35 is coupled to the bearing such that the bearing is rotatable with respect to the mounting groove 35; the mounting groove 35 may be integrally formed with the pillar 33 to reduce the complexity of the structure; specifically, the bearing of the first rotating platform 34 is arranged in the mounting groove 35, so that the structure is more compact; the turntable portion of the first turntable 34 is disposed outside the mounting groove 35 to facilitate connection with the electrode assembly 2.
As shown in fig. 8, a second turntable 23 is embedded in the mounting seat 22, and an output end of the second turntable 23 is connected with the clamp assembly 21 and is suitable for driving the clamp assembly 21 to rotate around the axis of the clamp assembly 21. First revolving stage 34 is provided with first connecting plate on keeping away from the one side of stand 33, is provided with the arch on the first connecting plate, and one side of mount pad 22 is provided with the second connecting plate, is provided with on the both sides that the second connecting plate parallels with protruding matched with on the first connecting plate sunken, through the grafting cooperation of first connecting plate with the second connecting plate to fasten through connecting pieces such as bolts, mount pad 22 is connected with stand 33. The second rotary table 23 comprises a bearing and a rotary table, the bearing is embedded in the mounting seat 22, the lower end of the bearing is connected with the rotary table, and the rotary table is connected with the clamp assembly 21. The bearing is driven to rotate through the direct drive motor, so that the rotary table is driven to rotate, the clamp assembly 21 is driven to rotate, and high positioning accuracy and repeated positioning accuracy are guaranteed when the clamp assembly rotates through a simple structure. An air pump 24 is arranged on the mounting seat 22, and the air pump 24 is arranged outside the mounting seat 22 and used for controlling the opening and the clamping of the clamp assembly 21. By integrating the air pump 24 at the side of the mounting seat 22, a compact structure and a fast response speed to the signal and control of the jig assembly 21 are ensured.
In some embodiments, the second turntable 23 may be a motor, and the motor is connected to the clamp assembly 21, and the rotation of the motor drives the rotation of the clamp assembly 21, so that the structure is simple and stable.
As shown in fig. 9, a connecting member 26 is provided between the second turntable 23 and the jig assembly 21, and the carbon brush 6 is provided on the outer peripheral side of the connecting member 26. A connecting member 26 is provided on the lower side of the second turntable 23, the connecting member 26 is in a circular tube shape, the upper end of the connecting member 26 is connected to the second turntable 23, and the lower end is connected to the jig assembly 21. The clamp assembly 21 adopts a pneumatic clamp with the repeated positioning precision less than or equal to 0.003mm, so that the high repeated precision of electrode installation is ensured; since spark is generated by the electric discharge machining, the pneumatic tube 25 is provided inside the connecting member 26 to prevent the spark generated by the electric discharge machining from igniting the pneumatic tube 25. The pneumatic pipeline 25 penetrates through the circular pipe-shaped connecting part 26, one end of the pneumatic pipeline is connected with the clamp assembly 21, the other end of the pneumatic pipeline is led out from the upper side of the second rotary table 23 to be connected with the rotary joint 17, the rotary joint 17 is arranged on the upper side of the second rotary table 23, the rotary joint 17 is connected with the air pump 24 through a pipeline, and the influence of the rotation of the clamp assembly 21 on the pipeline is avoided.
As shown in fig. 10 and 11, a carbon brush 6 is provided outside the connecting member 26 for transmitting current. The carbon brush 6 includes a carbon brush ring 61, and is mounted on the housing of the second turntable 23 through the carbon brush ring 61, and an electric wire may be provided along the column 33 outside the connecting member 26, and connected to the carbon brush ring 61 to energize the carbon brush 6. Be provided with the automatic tight device 62 that pushes up of many places that distributes along the circumference in carbon brush ring 61, automatic tight device 62 that pushes up can set up 3 to 6 for example, automatic tight device 62 that pushes up can include the copper seat, copper billet and elastic component, the elastic component can be the spring, the copper seat inlays through the screw thread and establishes in carbon brush ring 61, the inside chamber that holds of seting up of copper seat, it is provided with spring and copper billet to hold the intracavity, the copper billet directly pushes up on adapting unit 26's the outside, the spring mounting is between copper billet and copper seat, be used for pushing up tight copper billet, make the copper billet support at adapting unit 26 periphery side, make gapless between copper billet and adapting unit 26, and along with the wearing and tearing of copper billet, also can not produce the clearance, thereby form reliable and stable carbon brush 6.
As shown in fig. 14, the base body 11 is provided with a working liquid tank, and the work piece turn table 12 is provided in the working liquid tank. The working fluid tank is filled with working fluid, and the workpiece on the workpiece rotary table 12 is soaked in the working fluid. The working solution can be insulated, and the processing of the workpiece is not influenced; the working fluid can cool the high temperature in the electric spark machining process to prevent fire, can precipitate carbon slag generated after the electric spark machining process, and avoids environmental pollution. The bottom surface of the working liquid tank is provided with a working liquid tank bottom plate, the plane of the working liquid tank bottom plate is an inclined plane, impurities precipitated at the bottom of the working liquid tank can be conveniently discharged together during oil unloading, and cleaning is convenient. The work cistern includes work cistern body 7 and lift door subassembly 8, and the height on the liquid level height in the work cistern body 7 and the lift door plant of lift door subassembly 8 goes up the edge equals, and cooperation lift door subassembly 8 adjusts the height of lift door plant, can realize that the liquid level follows.
As shown in fig. 13 and 15, the workpiece rotary table 12 includes a bearing table body, a rotating shaft, and a second driving part adapted to drive the rotating shaft to rotate, a sealing cover 15 is disposed on an outer peripheral side of the rotating shaft, the rotating shaft is in sealing connection with the sealing cover 15, and an edge of the sealing cover 15 away from the rotating shaft is in sealing connection with the base body 11. The sealing between the sealing cover 15 and the rotating shaft adopts a two-way sealing mode, a framework oil seal can be used for first sealing at the outer side of the rotating shaft, the framework oil seal has proper elasticity, an oil film exists between the framework oil seal and the rotating shaft, and under the action of liquid surface tension, the oil film and an air contact end form a cambered surface to prevent leakage, so that the sealing of the rotating shaft is realized. And a second seal sealed by a star-shaped seal ring can be arranged right below the first seal, the star-shaped seal ring is a seal member with elastic sealing capacity, and even if the pressure at the sealing connection part is continuously increased, the pressure of the star-shaped seal ring generated by elasticity is relatively increased, so that the tightness of sealing can be still kept. Through setting up twice sealed, prevent to add the working solution and reveal the pollution second drive disk assembly man-hour.
As shown in fig. 15, a cavity is formed between the sealing cover 15 and the base body 11, an oil guiding structure 16 is disposed in the cavity, the oil guiding structure 16 may be an inclined plane which is distributed on the outer side of the rotating shaft along the circumferential direction and inclines outwards, and at least a portion of the oil guiding structure 16 is disposed corresponding to the connecting position of the rotating shaft and the sealing cover 15, that is, at least a portion of the oil guiding structure 16 is disposed below the connecting position of the rotating shaft and the sealing cover 15, so that the working fluid leaking due to the loose sealing can flow down along the inclined plane, and the rotating shaft and the first driving part are prevented from being contaminated by the working fluid.
In some embodiments, set up liquid level limiter 18 in the edge of plummer body lower surface, liquid level limiter 18 is the loop configuration, attached in plummer body lower surface in a side of liquid level limiter 18, liquid level limiter 18 keeps away from the one end of plummer body and extends to sealed lid 15, in-process to the work cistern injection working solution, liquid level limiter 18 can play the effect that blocks working solution, make the space between plummer body and the sealed lid 15 leave the air, in order to improve the sealed effect of this position.
And, a gap seal is formed between the upper surface of the end of the sealing cover 15 close to the rotating shaft and the bottom surface of the bearing table body, and based on the two seals formed at the position, the gap seal forms one seal above the first seal, so that three seals are formed at the position, and the sealing effect at the position is effectively improved.
As shown in fig. 16, the six-axis linkage electric spark forming machine further includes a tool setting gauge 4 and a telescopic assembly 5, wherein the tool setting gauge 4 is connected with the base assembly 1 through the telescopic assembly 5. The tool setting gauge 4 is arranged to enable the tool setting gauge 4 to touch the electrode, so that the position of a program origin in a machine tool coordinate system is determined, and positioning and loss compensation of the electrode in the first direction, the second direction and the third direction are achieved.
The telescopic assembly 5 comprises a movable bracket 51 and a rodless cylinder 52, the rodless cylinder 52 is fixedly connected to the middle of one side of the first supporting part 13 close to the workpiece rotary table 12, the movable bracket 51 is connected to the movable part of the rodless cylinder 52, the tool setting gauge 4 is arranged on the movable bracket 51, and the tool setting gauge 4 can extend and retract along the second direction along with the forward and backward movement of the rodless cylinder 52, specifically, the movable bracket 51 is arranged below the rodless cylinder 52, a third connecting plate which faces downwards vertically is arranged on the movable part of the rodless cylinder 52, and the lower end of the third connecting plate is connected with the movable bracket 51 through a bolt. The tool setting gauge 4 is arranged on one side, far away from the upright column 33, of the movable support 51 and is closer to the electrode assembly 2, so that the tool setting gauge 4 is aligned with the electrode assembly 2 conveniently during tool setting, and the time required by tool setting is saved. Under the condition of equal stroke, the rodless cylinder 52 occupies smaller axial space and saves space compared with a common cylinder. The rodless cylinder 52 is provided with a speed regulating device 53, specifically, a speed regulating valve is arranged above one end of the rodless cylinder 52, and the moving speed of the cylinder is regulated by regulating the gas flow entering the rodless cylinder 52, so that the extending and retracting speed of the tool setting gauge 4 is proper, the phenomena of impact, rebound and the like caused by the too high moving speed of the tool setting gauge 4 are avoided, and the tool setting time is also prevented from being influenced by the too low moving speed of the tool setting gauge 4. On the movable support 51, an air blowing component 20 is arranged on the upper side of the tool setting gauge 4, and the air blowing component 20 is installed close to the tool setting gauge 4, so that the tool setting part of the tool setting gauge 4 can be cleaned and blown, and the tool setting precision is ensured. By arranging the telescopic assembly 5, when the tool setting gauge 4 extends out, the alignment process of the tool setting gauge 4 and the electrode assembly 2 during tool setting can be facilitated, when the electrode assembly 2 moves to a certain range, the tool setting gauge 4 is driven to touch the electrode assembly 2 through the rodless cylinder 52, the process of repeatedly adjusting the position of the electrode assembly 2 is avoided, the position of the electrode assembly 2 is accurately aligned, the original point of a program is determined, and the control of position errors of the electrode assembly 2 and the compensation of consumption of the electrode assembly 2 are realized; when the tool setting gauge 4 is retracted and attached to the first support part 13, the movement of the electrode assembly 2 is prevented from being influenced, so that the interference of the workpiece processing is reduced, and the electrode assembly 2 can obtain a larger processing range.
In some embodiments, the tool setting gauge 4 is fixedly connected to the base assembly 1, and when the tool is set, the electrode assembly 2 is aligned to the tool setting gauge 4 fixed on the base assembly 1 through a preset path until the tool setting gauge touches the tool setting gauge, so that an original point of a program is determined, and control over position errors of the electrode assembly 2 is achieved. Tool setting appearance 4 and base subassembly 1 fixed connection, the structure is simpler, easily realizes, and is not fragile. The electrode assembly 2 is automatically aligned through a fixed path, and the operation is simpler.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A six-axis linkage electric spark forming machine, characterized by comprising a base assembly (1), an electrode assembly (2) and a connecting assembly (3) suitable for connecting the base assembly (1) and the electrode assembly (2), wherein,
the base assembly (1) comprises a base body (11) and a workpiece rotary table (12), the workpiece rotary table (12) is rotatably connected with the base body (11), and the electrode assembly (2) is arranged opposite to the workpiece rotary table (12);
the connection assembly (3) being adapted to provide the electrode assembly (2) with freedom of movement relative to the base body (11) in a first direction, a second direction and a third direction, respectively, wherein the first direction is perpendicular to the second direction, the third direction is perpendicular to a plane in which the first direction and the second direction lie, and the third direction is a vertical direction, the connection assembly (3) comprising a column (33) adapted to mount the electrode assembly (2);
the electrode assembly (2) is located on one side of the stand column (33), the electrode assembly (2) comprises a clamp assembly (21) and a mounting seat (22) which are suitable for clamping electrodes, a mounting groove (35) is formed in the end portion of the stand column (33), a first rotary table (34) is embedded in the mounting groove (35), a bearing of the first rotary table (34) is arranged in the mounting groove (35), a rotary table portion of the first rotary table (34) is arranged outside the mounting groove (35), the mounting seat (22) is rotatably connected with the connecting assembly (3) through the first rotary table (34), a second rotary table (23) is embedded in the mounting seat (22), an output end of the second rotary table (23) is connected with the clamp assembly (21), a rotating center line of the mounting seat (22) is perpendicular to a third direction, the clamp assembly (21) is rotatably connected with the mounting seat (22), the mounting seat (22) drives the clamp assembly (21) to rotate around a self axis for a preset angle, a rotating center joint (17) is arranged on the second rotary table (23), a connecting component (26) is arranged between the second rotary table (23) and a pneumatic joint (26), and a pneumatic connecting component (22) is arranged in a pipeline (25), one end of the pneumatic pipeline (25) is connected with the clamp assembly (21), the other end of the pneumatic pipeline (25) is connected with the rotary joint (17), and the rotary joint (17) is connected with the air pump (24) through a pipeline; the utility model discloses a carbon brush of adapting unit, including adapting unit, the casing of second revolving stage (23), adapting unit, the casing of second revolving stage (26) is provided with carbon brush (6) periphery side, carbon brush (6) are including carbon brush ring (61), install carbon brush ring (61) on the casing of second revolving stage (23), be provided with in carbon brush ring (61) along a plurality of automatic tight devices (62) in top of circumference distribution, automatic tight device (62) in top includes copper seat, elastic component and copper billet, the copper seat is fixed to be set up in carbon brush ring (61), the elastic component is installed the copper billet with between the copper seat, the copper billet supports the top and is in the periphery side of adapting unit (26).
2. The six-axis linkage electric spark forming machine tool according to claim 1, wherein two first supporting parts (13) are arranged on two sides of the base body (11), and the two first supporting parts (13) are arranged at intervals and are suitable for being in sliding connection with two ends of the connecting assembly (3);
a second supporting part (14) is arranged between the two first supporting parts (13), and one end, far away from the workpiece rotary table (12), of the second supporting part (14) protrudes out of the end part of the first supporting part (13) along the first direction.
3. The six-axis linkage electric spark forming machine tool according to claim 2, wherein the connecting assembly (3) comprises a movable beam (31) slidably connected with the first supporting portion (13) and the second supporting portion (14) along the first direction, one side of the movable beam (31) is a stepped structure, the stepped structure comprises a plurality of stepped portions, at least one of the stepped portions is provided with a guide rail assembly (9), at least one of the stepped portions is provided with a lead screw assembly (10), and one end of the lead screw assembly (10) is provided with a first driving part for driving the lead screw assembly (10) to move.
4. The six-axis linkage electric discharge machining machine according to claim 3, wherein the connecting assembly (3) further comprises a ram (32), and the ram (32) is slidably connected with the movable beam (31) along the second direction through the guide rail assembly (9) and the lead screw assembly (10).
5. The six-axis coordinated electric discharge machining tool according to claim 4, wherein the column (33) is slidably connected to the ram (32) in the third direction.
6. The six-axis coordinated electric discharge machining tool according to claim 5, wherein the connection assembly (3) further comprises a first turntable (34), the electrode assembly (2) is rotatably connected to the column (33) through the first turntable (34), and a rotation center line of the first turntable (34) is parallel to the first direction.
7. The six-axis linkage electric spark forming machine tool according to claim 1, wherein a working liquid tank is arranged on the base body (11), the workpiece rotary table (12) is arranged in the working liquid tank, the workpiece rotary table (12) comprises a bearing table body, a rotary shaft and a second driving part suitable for driving the rotary shaft to rotate, a sealing cover (15) is arranged on the outer peripheral side of the rotary shaft, the rotary shaft is in sealing connection with the sealing cover (15), and the edge of the sealing cover (15) far away from the rotary shaft is in sealing connection with the base body (11);
a cavity is formed between the sealing cover (15) and the base body (11), an oil guide structure (16) is arranged in the cavity, and at least part of the oil guide structure (16) is correspondingly arranged at the connecting position of the rotating shaft and the sealing cover (15).
8. The six-axis linkage electric spark forming machine tool according to claim 2, further comprising a tool setting gauge (4) and a telescopic assembly (5), wherein the tool setting gauge (4) is connected with the first supporting part (13) through the telescopic assembly (5).
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Effective date of registration: 20231207 Address after: 261500 No. 3008, Haomai Road, Mishui street, Gaomi City, Weifang City, Shandong Province Patentee after: Shandong Haomai CNC Machine Tool Co.,Ltd. Address before: 261500 No.1 Haomai Road, Mishui science and Technology Industrial Park, Gaomi City, Weifang City, Shandong Province Patentee before: HIMILE MECHANICAL SCIENCE AND TECHNOLOGY (SHANDONG) Co.,Ltd. |
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