CN110076402B - Auxiliary device for wire cut electrical discharge machining - Google Patents
Auxiliary device for wire cut electrical discharge machining Download PDFInfo
- Publication number
- CN110076402B CN110076402B CN201910391682.6A CN201910391682A CN110076402B CN 110076402 B CN110076402 B CN 110076402B CN 201910391682 A CN201910391682 A CN 201910391682A CN 110076402 B CN110076402 B CN 110076402B
- Authority
- CN
- China
- Prior art keywords
- magnetic field
- wire
- electromagnet
- axis
- platform
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000009763 wire-cut EDM Methods 0.000 title claims abstract description 18
- 238000003754 machining Methods 0.000 claims abstract description 76
- 238000005520 cutting process Methods 0.000 claims abstract description 32
- 230000005284 excitation Effects 0.000 claims description 24
- 238000010892 electric spark Methods 0.000 claims description 16
- 230000001939 inductive effect Effects 0.000 claims description 16
- 239000002131 composite material Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 235000012970 cakes Nutrition 0.000 claims description 3
- 239000000463 material Substances 0.000 description 41
- 102000004310 Ion Channels Human genes 0.000 description 21
- 108090000862 Ion Channels Proteins 0.000 description 21
- 230000003746 surface roughness Effects 0.000 description 19
- 238000010586 diagram Methods 0.000 description 14
- 239000002245 particle Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000005406 washing Methods 0.000 description 5
- 239000012224 working solution Substances 0.000 description 5
- 241000699666 Mus <mouse, genus> Species 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 241000784732 Lycaena phlaeas Species 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000003247 decreasing Effects 0.000 description 2
- 238000002242 deionisation method Methods 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N Silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910000883 Ti6Al4V Inorganic materials 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N Tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000009760 electrical discharge machining Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000002708 enhancing Effects 0.000 description 1
- 230000003628 erosive Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 230000003287 optical Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- 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
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/02—Wire-cutting
Abstract
The invention discloses an auxiliary device for wire-cut electric discharge machining, which can apply a magnetic field perpendicular to a machining direction, a magnetic field perpendicular to a wire electrode direction and a magnetic field perpendicular to the ground simultaneously in the wire-cut electric discharge machining process, and can clamp a workpiece on a three-degree-of-freedom ultrasonic vibration platform. The device comprises a horizontal magnetic field electromagnet, a vertical magnetic field electromagnet and an ultrasonic transducer; the horizontal magnetic field electromagnet and the vertical magnetic field electromagnet can move along the guide rail, move along with the movement of the wire electrode in the machining process, control the electromagnet to move along the guide rail, change the distance between the two magnetic poles and enable the magnetic field intensity at the machining position to be unchanged. The power of the ultrasonic transducer is controlled to enable the workpiece to generate ultrasonic vibration, the amplitude and the frequency are adjustable, and residues can be removed stably and reliably. The device can construct the magnetic field intensity, the magnetic field direction and the ultrasonic vibration intensity which are stable and consistent throughout the whole wire cutting process, and provides stable and good auxiliary conditions for wire cut electrical discharge machining.
Description
Technical Field
The invention belongs to the technical field of special machining electric spark wire cutting machining, and particularly relates to an auxiliary device for electric spark wire cutting machining.
Background
With the development of modern industry, the quality requirement of mechanical products is higher and higher, the traditional processing method is difficult to meet the processing requirements of various super-precision new materials and new structures with complex surfaces, and a special processing method is required to process the materials or the structures. The special machining is characterized by non-mechanical contact, no macroscopic cutting force, but a machining method that uses non-mechanical energy (optical, electrical, magnetic, thermal, chemical, etc.) to remove material.
The wire cut electrical discharge machining is a special machining method for machining metal materials by using electric energy, and is a machining method for corroding and removing workpiece materials by using continuous pulse discharge of a metal electrode wire in a uniform wire traveling process. Wire cut electrical discharge machining has been widely used in various fields such as aviation, dies and automobiles, and compared with the conventional machining method, the wire cut electrical discharge machining is suitable for materials which are difficult to machine by the conventional machining method such as titanium alloy, tungsten steel and the like, and has high precision requirement, good surface quality, high hardness, high strength, high melting point and the like, and also has obvious advantages when machining workpieces with complex shapes and special requirements, and the wire cut electrical discharge machining has high machining precision and good surface quality.
Although wire electrical discharge machining precision is high and the obtained workpiece has good surface quality, in order to obtain good surface quality, the machining efficiency and the manufacturing cost are paid; the wire cut electrical discharge machining process is a violent thermal process, and uses heat energy generated instantly by discharge pulses to corrode a certain volume of material, so that the material at a pulse discharge point is melted, evaporated and ionized, and cracks, pits and recast layers are inevitably generated on the surface of a workpiece; the discharge is unstable, and when the residue in the discharge gap is not effectively and timely washed away by the working solution, the discharge channel is shortened, so that the machining efficiency is reduced and the surface quality of the workpiece is reduced.
Therefore, there is a need to develop a new auxiliary device for wire-cut electric discharge machining, which overcomes the problems of unstable discharge and incapability of timely washing away the residue.
Disclosure of Invention
In order to overcome the defects or the improvement requirements in the prior art, the invention provides an auxiliary device for wire-cut electric discharge machining, which aims to configure a magnetic field direction and a magnetic field strength which are stable and unchangeable from beginning to end in the whole wire-cut electric discharge machining process by arranging a plurality of pairs of magnetic fields which are mutually overlapped in space and move along with a machining position, and ensure the stable consistency of ultrasonic vibration in the whole wire-cut electric discharge machining process by arranging a workpiece to be machined on a three-dimensional ultrasonic platform, thereby solving the problem that the magnetic field strength, the direction and the ultrasonic strength in the wire-cut electric discharge machining assisted by an ultrasonic magnetic field in the prior art cannot be stably consistent.
In order to achieve the aim, the invention provides an auxiliary device for wire cut electrical discharge machining, which comprises a horizontal magnetic field electromagnet, a vertical magnetic field electromagnet and a three-degree-of-freedom ultrasonic vibration platform,
the horizontal magnetic field electromagnet is used for providing a horizontal plane uniform magnetic field which is simultaneously vertical to the processing direction and the wire electrode direction, the vertical magnetic field electromagnet is used for providing a vertical direction uniform magnetic field which is parallel to the wire electrode direction, the horizontal plane uniform magnetic field and the vertical direction uniform magnetic field jointly act to form a composite magnetic field,
the three-degree-of-freedom ultrasonic vibration platform comprises an X-axis vibration exciting table, a Y-axis vibration exciting table and a Z-axis vibration exciting table, wherein the X-axis vibration exciting table, the Y-axis vibration exciting table and the Z-axis vibration exciting table are respectively used for realizing ultrasonic vibration in the X direction, the Y direction and the Z direction of a workpiece to be processed, the whole three-degree-of-freedom ultrasonic vibration platform and the workpiece to be processed are fixed together for ensuring that the ultrasonic vibration parameters of the workpiece are always stable and consistent in the whole process of processing,
the electrode wire for processing is arranged in a composite magnetic field during working, and the relative position of the composite magnetic field and the electrode wire can be adjusted so as to ensure that the parameters of the composite magnetic field at the electrode wire are always stable and consistent in the whole processing process.
Furthermore, the horizontal magnetic field electromagnets are provided with a plurality of pairs which are oppositely arranged, the horizontal magnetic field electromagnets are distributed by taking the electrode wire as an axis, and horizontal magnetic field electromagnet sliding rails are arranged on the horizontal magnetic field electromagnets for adjusting the relative distance of the magnetic poles of each pair of horizontal magnetic field electromagnets along the horizontal direction, so that the adjustment of the magnetic induction intensity at the electrode wire is realized.
Furthermore, the horizontal magnetic field electromagnets are provided with three pairs which are oppositely arranged, and the three pairs of horizontal magnetic field electromagnets are uniformly distributed along the circumference.
Furthermore, the vertical magnetic field electromagnet is provided with a pair of oppositely arranged vertical magnetic field electromagnet sliding rails, so that the vertical magnetic field electromagnet can slide along the sliding rails to adjust the relative distance between the vertical magnetic field electromagnets, and further the adjustment of the magnetic induction intensity in the vertical direction at the electrode wire is realized.
The three-degree-of-freedom ultrasonic vibration platform is connected with the sensor and the oscilloscope, the sensor is used for detecting ultrasonic vibration on the three-degree-of-freedom ultrasonic vibration platform, and the oscilloscope is used for displaying vibration parameters of the three-degree-of-freedom ultrasonic vibration platform.
The ultrasonic vibration testing device further comprises an ultrasonic transducer, wherein the X-axis vibration platform, the Y-axis vibration platform and the Z-axis vibration platform are respectively connected with one end of the ultrasonic transducer, the other end of the ultrasonic transducer is connected with a power supply, during work, the vibration frequency of the ultrasonic transducer is adjusted by adjusting the power of the power supply, the vibration frequency is controlled to be 10-20KHz, and the three power supplies and the three ultrasonic transducers are respectively used for correspondingly adjusting the vibration frequencies of the X-axis vibration platform, the Y-axis vibration platform and the Z-axis vibration platform.
Furthermore, the base of the three-degree-of-freedom ultrasonic vibration platform is fixed at the top end of the lifting platform, a plurality of base cylinders which are parallel to each other are arranged inside the base of the three-degree-of-freedom ultrasonic vibration platform,
a sliding block which can freely move along the base cylinder is fixed on the bottom surface of the X-axis vibration platform, the X-axis vibration platform can vibrate along the base cylinder under the action of an ultrasonic transducer,
the X-axis vibration platform is internally provided with a plurality of X-axis vibration platform cylinders which are parallel to each other, the Y-axis vibration platform is arranged on the X-axis vibration platform cylinders and can move back and forth along the X-axis vibration platform cylinders, the Y-axis vibration platform can vibrate along the X-axis vibration platform cylinders under the action of the ultrasonic transducer, the upper surface of the Y-axis vibration platform is simultaneously provided with a plurality of Y-axis vibration platform cylinders which are parallel to each other, the Z-axis vibration platform is arranged on the Y-axis vibration platform cylinders and can move up and down along the Y-axis vibration platform cylinders, the Z-axis vibration platform can vibrate along the Y-axis vibration platform cylinders under the action of the ultrasonic transducer, and the surface of the Z-axis vibration platform is provided with a vice for fixing a workpiece.
Furthermore, the device comprises a direct current excitation power supply, wherein the direct current excitation power supply is used for providing direct current with adjustable size for the horizontal magnetic field electromagnet and the vertical magnetic field electromagnet, and the adjustment of the size of the horizontal magnetic field intensity and the size of the vertical magnetic field intensity is realized by adjusting the size of the direct current.
The magnetic induction intensity of the horizontal magnetic field is 200 mT-400 mT, and the magnetic induction intensity of the vertical magnetic field is 200 mT-400 mT.
Furthermore, the horizontal magnetic field electromagnet and the vertical magnetic field electromagnet are both in a round cake shape.
In the invention, the intensity of the magnetic field is adjusted by adjusting the direct current or the distance between the magnetic poles of the electromagnet, and when the voltage of the direct current excitation power supply reaches 80V and the current reaches 10A, the intensity of the magnetic field reaches the maximum.
The device comprises an ultrasonic transducer, one end of the ultrasonic transducer is connected with a power supply, the other end of the ultrasonic transducer is connected with an excitation platform, the vibration frequency of the ultrasonic transducer is controlled by controlling the power of the power supply, the vibration frequency is controlled to be 10-20KHz, the vibration frequencies of the three platforms can be respectively adjusted according to the three power supplies, the vibration frequencies are different when the power supplies are different, the vibration with different frequencies is carried out in different directions, and electric power is converted into mechanical power.
In the invention, a workpiece is fixed by a clamping device on the three-degree-of-freedom ultrasonic vibration platform, the vibration frequency and the vibration amplitude of the three-degree-of-freedom vibration platform are adjusted by controlling the power of the ultrasonic transducer, so that a discharge channel is easier to form, the working liquid is easier to cool and circulate under the action of the eddy current and the pump suction of ultrasonic, the deionization of a medium between electrodes is accelerated, residues can be better removed from the workpiece and the wire electrode under the influence of ultrasonic vibration, the generation of secondary discharge is prevented, the processing efficiency is improved, and the processing quality and the surface roughness are improved.
In the invention, the sensor is connected on the three-degree-of-freedom ultrasonic vibration platform, the vibration amplitude and the vibration frequency of the vibration excitation platform are displayed through the oscilloscope, the vibration amplitude and the vibration frequency are compared with the vibration amplitude and the vibration frequency which are designed in advance, the power of the ultrasonic transducer is corrected through the feedback data, and the parameters meeting the requirements are achieved, so that the auxiliary processing effect of the ultrasonic vibration is best, the processing speed is more effectively improved, and the surface quality is improved.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
(1) the direction during spark-erosion wire cutting is unfixed, and the invariable magnetic field of direction can only provide invariable lorentz force in a direction of motion of wire electrode, but just can not produce the help to the electricity processing when the wire electrode direction changes, consequently adopts compound magnetic field, makes the lorentz force that the wire electrode received the direction different under different magnetic fields, and horizontal magnetic field electromagnet group produces the magnetic field of horizontal direction for the wire electrode receives the lorentz force perpendicular with the processing direction and produces the vibration, gets rid of the residue around the wire electrode. The vertical magnetic field electromagnet enables the electrode wire to be subjected to Lorentz force along the movement direction, the processing speed is improved, and the material removal rate is improved.
(2) Compared with single-degree-of-freedom ultrasonic vibration, the three-degree-of-freedom ultrasonic excitation platform can simultaneously perform composite vibration in three directions, so that the flatness of the processed surface is changed, the contact between the electrode wire and the surface of the workpiece is better, and the generation of abnormal discharge is reduced. In addition, the ultrasonic vibration with multiple degrees of freedom can more effectively remove residues generated after processing, improve the processing speed of materials, reduce the surface roughness of the processed materials and improve the surface quality.
(3) The device of the invention obviously improves the washing efficiency of the residue in the discharge gap of the wire-electrode cutting, improves the proportion of effective discharge waveforms, and solves the problems of unstable discharge, incapability of effectively washing the residue in the discharge gap by working solution in time, crack pits and recasting layers generated in the machining process and the like in the existing wire-electrode cutting machining technology, thereby solving the problems of low wire-electrode cutting machining efficiency and poor surface quality.
Drawings
FIG. 1 is a schematic three-dimensional structure of a horizontal magnetic field electromagnet in the auxiliary device for electric discharge machining of a machine tool according to the present invention;
FIG. 2 is a schematic three-dimensional structure diagram of a horizontal magnetic field electromagnet arranged on a slide rail according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a three-degree-of-freedom ultrasonic vibration platform lifting structure in an embodiment of the present invention;
FIG. 4 is a schematic diagram of a three-dimensional structure of a three-degree-of-freedom ultrasonic vibration platform according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a three-dimensional structure of a vertical magnetic field electromagnet according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating the force applied by the electric spark discharge current in the magnetic field according to an embodiment of the present invention;
FIG. 7 is a diagram illustrating the stress of the current in the discharge channel in the magnetic field according to an embodiment of the present invention.
Throughout the drawings, like reference numerals refer to like structures or elements, wherein:
1-horizontal magnetic field electromagnet slide rail, 2-wire electrode, 3-electromagnet support, 4-horizontal magnetic field electromagnet, 5-horizontal magnetic field electromagnet pole, 6-fastening screw, 7-lifting platform, 8-rocker, 9-bevel gear, 10-control platform, 11-three-degree-of-freedom ultrasonic vibration platform base, 12-base cylinder, 13-X axis vibration table, 14-X axis vibration table cylinder, 15-Y axis vibration table, 16-Y axis vibration table cylinder, 17-Z axis vibration table, 18-vertical magnetic field electromagnet, 19-vertical magnetic field electromagnet slide rail, 20-vertical magnetic field electromagnet pole
A-magnetic field direction, B-Lorentz magnetic force direction, C-electric spark discharge current method and D-electric spark channel discharge current direction
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The invention discloses an auxiliary device for wire-cut electric discharge machining, which can apply a magnetic field perpendicular to a machining direction, a magnetic field perpendicular to a wire electrode direction and a magnetic field perpendicular to the ground simultaneously in the wire-cut electric discharge machining process, and can clamp a workpiece on a three-degree-of-freedom ultrasonic vibration platform. The device comprises a direct-current excitation power supply, an annular electromagnet and an ultrasonic transducer; the annular electromagnet can move along the guide rail, moves along with the wire electrode in the machining process, controls the annular electromagnet to move along the guide rail, and changes the distance between the two magnetic poles, so that the magnetic field intensity of the machining position is unchanged. The power of the ultrasonic transducer is controlled to enable the workpiece to generate ultrasonic vibration, the amplitude and the frequency are adjustable, and residues can be removed stably and reliably. The device can construct the magnetic field intensity, the magnetic field direction and the ultrasonic vibration intensity which are stable and consistent throughout the whole wire cutting process, and provides stable and good auxiliary conditions for wire cut electrical discharge machining.
The core concept of the device according to the invention is further explained in detail below. Before the present invention is explained in more detail, the following will be described with respect to wire electric discharge machining and general electric discharge machining:
wire electric discharge machining is very different from general electric discharge machining, and wire electric discharge machining cannot be simply equivalent to general electric discharge machining. The wire-cut electric discharge machining and the general electric discharge machining are the biggest differences: the electrode for wire cutting is a wire electrode with extremely fine size, generally not more than 0.25mm, the material can be brass wire, molybdenum wire and the like, the electrode has strong flexibility, and the electrode is different from a rigid electrode adopted in electric spark machining; meanwhile, the size of the wire cutting electrode is far smaller than that of a common electric spark electrode. In addition, the electrode wire does not stop carrying wire movement in the process of cutting the slow-moving wire, the electrode wire moves from the upper wire nozzle to the lower wire nozzle, and the electrode is disposable. Therefore, the wire-electrode cutting wire is easily affected by external force, and under the action of an external magnetic field, the motion rule of the electrode and the wire-electrode cutting mechanism are more complex, and the motion rule and the wire-electrode cutting mechanism are not equivalent to those of the common electric spark machining technology.
More specifically:
1) in the electrode aspect, the tool electrode for electric discharge machining is mostly a cylindrical bar or various other shapes and is not easily deformed, so the lorentz force generated by the magnetic field hardly acts on the electrode. On the contrary, the tool electrode for the slow-moving wire cutting is an extremely fine wire electrode, and is easily bent and vibrated by the lorentz force generated by the magnetic field, so that the magnetic field has a complicated action on the tool electrode. Meanwhile, the electrode wire can continuously move and change the current to pass through, and Lorentz force can be generated under the action of the magnetic field, so that the vibration of the electrode wire is more complex, and the processing efficiency and quality are difficult to improve by adopting a simple magnetic field device.
2) In the aspect of a discharge channel, the electric spark machining discharge channel is distributed in a plane, namely the electric spark machining discharge channel is concentrated on the contact surface of a tool electrode and a workpiece, and the action of a magnetic field on the electric spark machining discharge channel is simpler; in the slow wire cutting process, the discharge channels are distributed in a semicircular ring shape, so that the magnetic field has different effects on the discharge points at different positions of the circular ring shape, and the generated Lorentz forces are different.
3) In the aspect of residue discharge, the electric spark machining residues are discharged to the periphery under the action of discharge explosive force and Lorentz force, and the stress and mechanism are simple; in the slow-walking wire cutting process, due to the fact that deflection and vibration of the wire electrode and the distribution of discharge points are not uniform, stress of residues under a magnetic field is more complex, and the residues can be removed only by a more appropriate magnetic field device.
Fig. 1 is a schematic three-dimensional structure diagram of a horizontal magnetic field electromagnet in an auxiliary device for electric discharge machining of a machine tool of the present invention, and fig. 2 is a schematic three-dimensional structure diagram of a horizontal magnetic field electromagnet arranged on a slide rail in an embodiment of the present invention, as shown in fig. 1 and fig. 2, for example, six horizontal magnetic field electromagnet slide rails 1 with a length of 50cm are symmetrically fixed on a table of the machine tool with an electrode wire 2 as an axis, the bottom of an electromagnet support 3 used as a support is matched with the slide rail 1, the electromagnet support 3 can freely move along the slide rail 1, and the distance between the electromagnet pair is changed by adjusting the position of the electromagnet support 3, so as to change. Specifically, as can be seen from fig. 1, for example, two of the six horizontal magnetic field electromagnet slide rails are arranged in pairs, and the relative distance between a pair of horizontal magnetic field electromagnets can be adjusted to change the magnetic field intensity at the position of the wire electrode 2. Similarly, the relative distance between the three pairs of horizontal magnetic field electromagnets can be adjusted, and the composite electromagnetic field intensity at the position of the wire electrode 2 can be changed in this way. One end of the electromagnet bracket 3 is fixed with a horizontal magnetic field electromagnet 4 with the diameter of 30cm, for example, the horizontal magnetic field electromagnet is in a round cake shape, the central pole column 5 of the horizontal magnetic field electromagnet 4 has the diameter of 12cm, for example, and the height of 5cm, for example, and can generate a uniform magnetic field in the horizontal direction after being electrified. Three pairs of horizontal magnetic field electromagnets can be uniformly distributed along the same circumference, and every two electromagnets are adjacent to each other by 60 degrees. Or the three pairs of horizontal magnetic field electromagnets are flexibly distributed according to the requirement, do not need to be arranged on the same circumference, and have no requirement on the adjacent angles. The electromagnet support 3 is arranged in the supporting column, the electromagnet support 3 is fixed on the supporting column through the fastening screws, and the height of the electromagnet support 3 can be adjusted by screwing or unscrewing the fastening screws 6, so that the relative position of the horizontal uniform magnetic field in the height direction is controlled. In summary, the horizontal relative distance and height of the three pairs of horizontal magnetic field electromagnets can be flexibly adjusted to adjust the strength at the position of the wire electrode 2.
Fig. 3 is a schematic diagram of a three-degree-of-freedom ultrasonic vibration platform lifting structure in an embodiment of the present invention, as can be seen from the figure, the adjustable lifting platform 7 is arranged on the control platform 10, the three-degree-of-freedom ultrasonic vibration platform is integrally arranged at the top of the adjustable lifting platform 7, the control platform 10 is fixed on the machine tool, the bevel gear 9 is fixed on the rocker 8, the rocker 8 is shaken to drive the bevel gear 9 to rotate, the rotation of the bevel gear 9 drives another bevel gear engaged with the bevel gear 9 to rotate, the other bevel gear is positioned at the end part of a screw rod, the screw rod is arranged at the two sides of a control platform 10, the screw rod has a set length, the two sides of the lifting platform 7 are also connected with the screw rod, through the engagement between the bevel gears, thereby driving the screw rod to lift, the adjustable lifting platform 7 is arranged on the screw rod, further driving the lifting platform 7 to move up and down, the three-degree-of-freedom ultrasonic vibration platform works on the same height with the central magnetic field.
Fig. 4 is a schematic three-dimensional structure diagram of a three-degree-of-freedom ultrasonic vibration platform in an embodiment of the present invention, as can be seen from fig. 3 and 4, a bottom surface of a base 11 of the three-degree-of-freedom ultrasonic vibration platform is fixed at a top end of a lifting platform 7, a plurality of base cylinders 12 parallel to each other are disposed inside the base 11 of the three-degree-of-freedom ultrasonic vibration platform, a slider capable of freely moving along the base cylinders 12 is fixed at a bottom surface of an X-axis vibration table 13, the X-axis vibration table can vibrate along the base cylinders 12 under the action of an ultrasonic transducer, a plurality of X-axis vibration table cylinders 14 parallel to each other are disposed inside the X-axis vibration table 13, a Y-axis vibration table 15 is disposed on the X-axis vibration table cylinders 14 so as to move back and forth along the X-axis vibration table cylinders 14, under the action of the ultrasonic transducer, the Y-axis vibration table 15 can vibrate along the X-axis vibration table cylinders 14, a plurality of Y-axis vibration table, the Z-axis excitation platform 17 is arranged on the Y-axis excitation platform cylinder 16 and can move up and down along the Y-axis excitation platform cylinder 16, the Z-axis excitation platform 17 can vibrate along the Y-axis excitation platform cylinder 16 under the action of the ultrasonic transducer, and the surface of the Z-axis excitation platform 17 is provided with a vice for fixing a workpiece. The design can realize the vibration of the workpiece to be processed in three directions of an X axis, a Y axis and a Z axis.
Fig. 5 is a schematic diagram of a three-dimensional structure of a vertical magnetic field electromagnet according to an embodiment of the present invention, and it can be seen from the diagram that the height of the electromagnet 18 providing a vertical magnetic field is, for example, 50cm, the bottom end of the vertical magnetic field electromagnet 18 is disposed on a vertical magnetic field electromagnet slide rail 19 so as to be able to move freely along the vertical magnetic field electromagnet slide rail, the coil diameter of the vertical magnetic field electromagnet 18 is, for example, 30cm, and the diameter of the vertical magnetic field electromagnet pole 20 is, for example, 12cm, so as to provide a uniform magnetic field of. The direction of the magnetic field generated by the vertical magnetic field electromagnet is parallel to the wire electrode 2. The magnetic field in the horizontal direction and the magnetic field in the vertical direction have a comprehensive effect and can be changed along with the change of the processing position, so that the magnetic field intensity at the electrode wire can be flexibly adjusted according to the requirement.
In wire cut electrical discharge machining, the discharge ion channel provides necessary heat energy for material removal, so that workpiece materials are instantly liquefied and vaporized; after the pulse discharge is finished, the molten material forms a molten pool on the surface of the workpiece; the auxiliary magnetic field provided by the invention limits and compresses the discharge ion channel, so that the ion density in the discharge ion channel can be improved, and the mutual collision of charged particles in the ion channel is intensified. On the other hand, the magnetic field can weaken the disturbance of charged particles on the surface of the electrode, thereby improving the stability of the discharge ion channel. In addition, the ultrasonic vibration can enable the electrode wire to vibrate in the machining process, and the characteristics can increase the discharge contact points on the surface of the workpiece, so that the current density is increased, the material removal rate is improved, and the quality of the machined surface is improved.
Fig. 6 is a schematic diagram of a stress of an electric spark discharge current in a magnetic field in an embodiment of the present invention, and fig. 7 is a schematic diagram of a stress of a current in a discharge channel in a magnetic field in an embodiment of the present invention, where a denotes a magnetic field direction, B denotes a lorentz magnetic force direction, C denotes an electric spark discharge current method, and D denotes a discharge current direction in the electric spark channel. As can be seen from the two figures, the non-magnetic material is not affected by any magnetic force. However, when the current passes through the non-magnetic workpiece material and the electrode wire and forms a certain angle with the direction of the loaded magnetic field, two Lorentz forces are generated, one acts on the discharge ion channel, and the other acts on the electrode wire, so that the direction of the loaded magnetic field has a great influence on the processing result, and the direction of the magnetic field is perpendicular to the processing direction and the electrode wire, thereby ensuring that the workpiece and the electrode wire on the discharge ion channel are acted by the Lorentz forces.
As can be seen from fig. 7, when a magnetic field acts on a non-magnetic workpiece on a discharge ion channel, the applied magnetic field can not only reduce the rate of abnormal discharge (arc discharge and transition discharge), but also reduce the glitches of the normal discharge waveform. The Lorentz force resultant force can gather the discharge ion channel and improve the ion density in the discharge ion channel, so that the mutual collision of charged particles in the ion channel is aggravated, and the material removal rate is improved; and Lorentz force can accelerate the formation of a molten pool, increase the depth and the area of the molten pool (further improve the material removal rate), and improve the efficiency of flushing processing residues by the working liquid.
According to the actual demand, three degree of freedom ultrasonic vibration platforms are controlled by three ultrasonic transducer and three DC power supply respectively, make the work piece can carry out ultrasonic vibration simultaneously or respectively along X, Y, Z three directions, make the discharge passage form more easily, the vortex of supersound and pump suction make working solution cool off and the circulation more easily, accelerate the deionization of inter-electrode medium, the residue can be got rid of better to work piece and wire electrode under ultrasonic vibration's influence, prevent secondary discharge's production, machining efficiency is improved, machining quality and surface roughness have been promoted.
The three excitation platforms are respectively connected with a displacement sensor, the displacement sensors are connected with an oscilloscope, displacement signals are converted into electric signals through the oscilloscope, and the actual excitation platform motion is compared with set parameters (the frequency is 15KHz, the amplitude is 30 mu m) to obtain the optimal ultrasonic transducer input power meeting the requirements, so that the experimental data are more accurate.
In fact, the magnetic field generating device for generating a magnetic field is not limited to the structure of the auxiliary device provided in the embodiments, and various magnetic field generating devices capable of generating a magnetic field with an appropriate magnetic induction intensity can meet the object of the present invention.
The auxiliary device provided by the invention is further described below by combining specific embodiments and a processing environment.
Example 1
And (3) processing environment: the wire cutting machine is a high-performance 5-axis numerical control slow-moving wire electric discharge machine tool, and a metal workpiece to be processed is a titanium alloy Ti6Al4V which is a difficult-to-process material and has the thickness of 10 mm;
pulse width of pulse current provided by the machine tool is 22 mus, and current is 5A; cutting a cutting seam with the length of 5 mm; the direct-current excitation power supply of the auxiliary device has the function of current overvoltage over-temperature protection, the current precision of the power supply is 10mA, direct current with the current of 0-10A and the voltage of 0-30V can be provided, and the output power is 300W; the electromagnet of the auxiliary device comprises magnetic poles, magnetic yokes (comprising vertical yokes and transverse yokes), coils and column sleeves, which are all made of industrial pure iron, wherein the distance between the coils is 80mm, the diameter of the magnetic pole head of the electromagnet is 12mm, the distance between the two magnetic poles is adjustable within 80mm, and a magnetic field of 1T can be generated to the maximum extent; the magnetic induction intensity of a magnetic field generated by the auxiliary device is 200mT, the direction of the magnetic field is simultaneously vertical to the wire electrode and the linear cutting machining direction, and the cutting angle is vertical; the rotating speed of the electromagnet group is 15r/min, the power of the ultrasonic converter is 150W, the vibration frequency of the three platforms is 15KHz, the amplitude is 30 mu m, the electrode wire of the wire cut electrical discharge machining system is a 0.1mm common copper wire, the wire speed is 0.15m/s, and the wire tension is 15N; the working solution is deionized water, the temperature is 25 ℃, and the water pressure is 7 Kg; the pulse interval is 8 mus, and the feeding speed is 10 mm/min.
After the auxiliary device provided by the embodiment is adopted, the material removal rate is 0.085mm3/min，The surface roughness of the obtained workpiece was 1.184 μm; without the auxiliary device provided by the embodiment, the material removal rate is 0.034mm3Min, the surface roughness of the obtained work piece was 1.77. mu.m. In contrast, the auxiliary device and the method provided by the embodiment improve the material removal rate by 2.5 times, and reduce the surface roughness of the obtained workpiece by 33.1%.
Example 2
And (3) processing environment: the wire cutting machine is a high-performance 5-axis numerical control slow-moving wire electric discharge machine tool, and a metal workpiece to be processed is metal-based composite material aluminum-based silicon carbide with the thickness of 10 mm.
Pulse width of pulse current provided by the machine tool is 22 mus, and current is 5A; cutting a cutting seam with the length of 5 mm; the direct-current excitation power supply of the auxiliary device has the function of current overvoltage over-temperature protection, the current precision of the power supply is 10mA, direct current with the current of 0-10A and the voltage of 0-30V can be provided, and the output power is 300W; the electromagnet of the auxiliary device comprises magnetic poles, magnetic yokes (comprising vertical yokes and transverse yokes), coils and column sleeves, which are all made of industrial pure iron, wherein the distance between the coils is 80mm, the diameter of the magnetic pole head of the electromagnet is 12mm, the distance between the two magnetic poles is adjustable within 80mm, and a magnetic field of 1T can be generated to the maximum extent; the magnetic induction intensity of a magnetic field generated by the auxiliary device is 400mT, the direction of the magnetic field is simultaneously vertical to the wire electrode and the linear cutting machining direction, and the cutting angle is vertical; the rotating speed of the electromagnet group is 15r/min, the power of the ultrasonic converter is 150W, the vibration frequency of the three platforms is 15KHz, the amplitude is 30 mu m, the electrode wire of the wire cut electrical discharge machining system is a 0.15mm microcrack copper wire, the wire speed is 0.15m/s, and the wire tension is 15N; the working solution is deionized water, the temperature is 25 ℃, and the water pressure is 7 Kg; the pulse interval is 8 mus, and the feeding speed is 10 mm/min.
After the auxiliary device and the method provided by the embodiment are adopted, the material removal rate is 0.108mm3Min, the surface roughness of the obtained workpiece is 1.3 mu m; without the auxiliary device and method provided by the embodiment, the material removal rate is 0.034mm3Min, the surface roughness of the obtained workpiece is 1.77 mu m; in contrast, the auxiliary device and the method provided by the embodiment can improve the material removal rate3.2 times, the surface roughness (μm) of the obtained workpiece decreased by 26.6%.
Example 3
Example 3 differs from the processing environment of example 1 in that: the processed material is 10mm thick, the electrode wire is made of common copper wire with the diameter of 0.15mm, the rotating speed of the electromagnet group is 15r/min, the power of the ultrasonic converter is 150W, the vibration frequency of the three platforms is 15KHz, the amplitude is 30 mu m, the magnetic induction intensity provided by the auxiliary device is 400mT, the pulse width of the pulse current provided by the machine tool is 22 mu s, and the current is 2A, and the rest is the same as that of the embodiment 1.
After the auxiliary device provided by the embodiment is adopted, the material removal rate is 0.083mm3Min, the surface roughness of the obtained workpiece is 0.52 mu m; without the auxiliary device provided by the embodiment, the material removal rate is 0.017mm3Min, the surface roughness of the obtained workpiece is 0.58 mu m; in contrast, the auxiliary device provided by the embodiment improves the material removal rate by 5 times, and the surface roughness of the obtained workpiece is reduced by 10.3%.
Example 4
Example 4 differs from the processing environment of example 1 in that: the processed material is a 10mm thick carbon fiber plate, the electrode wire is a microcrack copper wire with the diameter of 0.25mm, the rotating speed of the electromagnet group is 15r/min, the power of the ultrasonic converter is 150W, the frequency of the platform vibration is 15KHz, the amplitude is 30 μm, the magnetic induction intensity provided by the auxiliary device is 400mT, the pulse width of the pulse current provided by the machine tool is 16 μ s, and the current is 5A, and the rest is the same as that of the embodiment 1.
After the auxiliary device and the method provided by the embodiment are adopted, the material removal rate is 0.082mm3Min, the surface roughness of the workpiece obtained was 1.05 μm, conventionally 0.058mm3Min, the proportion of effective waveforms is obviously improved, and the material removal rate is improved by 1.4 times; the magnetic field assisted surface roughness was 1.05 μm, the conventional 1.18 μm, and the surface roughness decreased by 11%.
The processing environments of the following examples 5 to 8 are different from those of example 1 in the pulse width and the current, and the others are the same as those of example 1; the processing environment parameters, material removal rate, and surface roughness data of examples 5 to 8 are shown in table 1 below.
TABLE 1 parameter lists for examples 5-8
The data of the embodiment show that the auxiliary device and the method provided by the invention are used for wire cut electrical discharge machining, the material removal rate can be effectively improved, and the surface roughness of the obtained workpiece can be effectively reduced.
In the invention, the magnetic field is a uniform magnetic field with the magnetic induction intensity within 1T, and a magnetic field with the magnetic induction intensity of 200mT or 400mT is adopted. The sliding electromagnet group and the electromagnet with the magnetic field direction vertical to the ground form a three-dimensional full-coverage space composite magnetic field. The wire cut electrical discharge machining is assisted by a horizontal magnetic field and a vertical magnetic field respectively, magnetic induction lines penetrate into the palm of the hand according to the left-hand rule, the four-finger direction is the current direction, and when the electrode wire moves in the direction parallel to the magnetic field, the horizontal magnetic field can enable the electrode wire to generate Lorentz force vertical to the machining direction of the electrode wire, so that vibration is generated, and residues can be effectively removed; when the electrode wire moves along the direction vertical to the magnetic field, the magnetic field in the horizontal direction can enable the electrode wire to generate Lorentz force in the same direction as the moving direction of the electrode wire, and the processing speed of the workpiece is improved.
In the device, a magnetic field which is vertical to a machining direction and a wire electrode is applied to a workpiece in the wire electric discharge machining process, a discharge ion channel in the wire electric discharge machining is limited and compressed through the magnetic field, and Lorentz force acting on the discharge ion channel and Lorentz force acting on the wire electrode are generated, so that the ion density in the discharge ion channel is improved, the mutual collision of charged particles in the discharge ion channel is aggravated, the discharge contact points on the surface of the workpiece are increased, and the effect of improving the material removal rate is achieved; and the magnetic field can weaken the disturbance of charged particles on the surface of the electrode, improve the stability of a discharge ion channel and improve the quality of a processed surface.
In the wire-cut electric discharge machining process, a magnetic field which is perpendicular to the machining direction and a wire electrode is applied to a workpiece, a discharge ion channel in the wire-cut electric discharge machining is limited and compressed through the magnetic field, and Lorentz force acting on the discharge ion channel and Lorentz force acting on the wire electrode are generated, so that the ion density in the discharge ion channel is improved, mutual collision of charged particles in the discharge ion channel is intensified, discharge contact points on the surface of the workpiece are increased, and the effect of improving the material removal rate is achieved; and the magnetic field can weaken the disturbance of charged particles on the surface of the electrode, improve the stability of a discharge ion channel and improve the quality of a processed surface.
The device of the invention is provided with a lifting platform which is controlled by a bevel gear in a rotating way, a workpiece can be processed at the height of a central magnetic field by the lifting platform, a three-degree-of-freedom ultrasonic excitation platform which can be used for placing a vice is added at the top end of the lifting platform, the three-degree-of-freedom ultrasonic excitation platform is connected with an ultrasonic transducer, the frequency and the amplitude of ultrasonic vibration are controlled by controlling the power of the ultrasonic transducer, multiple tests show that the processing speed can be improved by 10% when the ultrasonic vibration frequency is 15KHz and the vibration amplitude is 30 mu m, the surface roughness can be obviously reduced, the power of the ultrasonic transducer is 150W at the moment, the workpiece is connected with the ultrasonic excitation platform by the vice, the workpiece can vibrate regularly in the processing process, the probability of collision of charged particles is improved, and the material removal rate of the material in the processing process can be improved, the processed residues are rapidly removed, the processing efficiency is improved, and the surface quality is improved. The ultrasonic vibration can enable the surface of the workpiece to generate a discharge channel more easily, and reduce the probability of abnormal discharge under the condition of processing some materials with lower conductivity. During the discharge, the wire electrode was moved from top to bottom with a wire diameter of 0.25mm, and the workpiece was regularly vibrated with an amplitude of 30 μm, and the relative movement of the two allowed rapid removal of the residue. Ultrasonic vibration can also make the work piece produce a large amount of bubbles in the course of working, and the explosion of bubble can play the scouring action to the residue equally for the residue can be got rid of fast. The ultrasonic vibration of the X axis is the same as the movement direction of machining, the machining speed can be improved, the machining gap can be uniform due to the ultrasonic vibration of the Y axis, the flatness of a machined surface is improved, residues can be better taken away by the electrode wire due to the ultrasonic vibration of the Z axis, and the material erosion rate is improved.
The device can obviously enhance the washing efficiency of the residue in the discharge gap of the wire-electrode cutting, improve the proportion of effective discharge waveforms, and solve the problems of unstable discharge, incapability of effectively washing the residue in the discharge gap by working fluid in time, crack pits and recasting layers generated in the machining process and the like in the conventional wire-electrode cutting machining technology, thereby solving the problems of low wire-electrode cutting machining efficiency and poor surface quality and meeting the industrial requirements.
The device has the advantages of low cost, simple structure, convenient use and good use effect, and test data shows that the device can effectively improve the material removal rate, reduce the surface roughness of workpieces and obviously improve the wire cut electrical discharge machining efficiency and the surface quality.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. An auxiliary device for wire cut electrical discharge machining is characterized by comprising a horizontal magnetic field electromagnet, a vertical magnetic field electromagnet and a three-degree-of-freedom ultrasonic vibration platform,
the horizontal magnetic field electromagnet is used for providing a horizontal plane uniform magnetic field which is simultaneously vertical to the processing direction and the wire electrode direction, the vertical magnetic field electromagnet is used for providing a vertical direction uniform magnetic field which is parallel to the wire electrode direction, the horizontal plane uniform magnetic field and the vertical direction uniform magnetic field jointly act to form a composite magnetic field,
the three-degree-of-freedom ultrasonic vibration platform comprises an X-axis vibration exciting table, a Y-axis vibration exciting table and a Z-axis vibration exciting table, wherein the X-axis vibration exciting table, the Y-axis vibration exciting table and the Z-axis vibration exciting table are respectively used for realizing ultrasonic vibration in the X direction, the Y direction and the Z direction of a workpiece to be processed, the whole three-degree-of-freedom ultrasonic vibration platform and the workpiece to be processed are fixed together for ensuring that the ultrasonic vibration parameters of the workpiece are always stable and consistent in the whole process of processing,
the electrode wire for processing is arranged in a composite magnetic field during working, and the relative position of the composite magnetic field and the electrode wire can be adjusted so as to ensure that the parameters of the composite magnetic field at the electrode wire are always stable and consistent in the whole processing process.
2. The auxiliary device for wire-cut electric discharge machining according to claim 1, wherein the horizontal magnetic field electromagnets have a plurality of pairs arranged oppositely, the plurality of pairs of horizontal magnetic field electromagnets are distributed with the wire electrode as an axis, and each of the plurality of pairs of horizontal magnetic field electromagnets is provided with a horizontal magnetic field electromagnet slide rail for horizontally adjusting the relative distance of the magnetic poles of each pair of horizontal magnetic field electromagnets, thereby realizing adjustment of the magnetic induction intensity at the wire electrode.
3. The auxiliary device for wire-cut electric discharge machining according to claim 2, wherein the horizontal magnetic field electromagnets have three pairs arranged oppositely, and the three pairs of horizontal magnetic field electromagnets are uniformly circumferentially distributed.
4. The auxiliary device for wire-cut electric discharge machining according to claim 3, wherein the vertical magnetic field electromagnet has a pair of oppositely disposed vertical magnetic field electromagnets, and the vertical magnetic field electromagnet is provided with a vertical magnetic field electromagnet slide rail for allowing the vertical magnetic field electromagnet to slide along the slide rail to adjust the relative distance between the poles of the vertical magnetic field electromagnets, thereby achieving adjustment of the magnetic induction intensity in the vertical direction at the wire electrode.
5. The auxiliary device for electric spark linear cutting machining according to any one of claims 1-4, further comprising a sensor and an oscilloscope, wherein the sensor and the oscilloscope are connected to the three-degree-of-freedom ultrasonic vibration platform, the sensor is used for detecting the ultrasonic vibration on the three-degree-of-freedom ultrasonic vibration platform, and the oscilloscope is used for displaying the vibration parameters of the three-degree-of-freedom ultrasonic vibration platform.
6. The auxiliary device for wire-cut electric discharge machining according to claim 5, further comprising an ultrasonic transducer, wherein the X-axis vibration table, the Y-axis vibration table and the Z-axis vibration table are respectively connected to one end of the ultrasonic transducer, the other end of the ultrasonic transducer is connected to a power supply, and when the auxiliary device works, the power of the power supply is adjusted to adjust the vibration frequency of the ultrasonic transducer, the vibration frequency is controlled to be 10-20KHz,
the three power supplies and the three ultrasonic transducers are respectively used for correspondingly adjusting the vibration frequencies of the X-axis vibration exciting table, the Y-axis vibration exciting table and the Z-axis vibration exciting table.
7. Auxiliary device for wire-cut electric discharge machining according to claim 5, characterized in that the base (11) of the three-degree-of-freedom ultrasonic vibration platform is fixed on the top end of the lifting platform (7), the base (11) of the three-degree-of-freedom ultrasonic vibration platform is internally provided with a plurality of base cylinders (12) which are parallel to each other,
a sliding block which can freely move along the base cylinder (12) is fixed on the bottom surface of the X-axis excitation table (13), the X-axis excitation table can vibrate along the base cylinder (12) under the action of an ultrasonic transducer,
a plurality of X-axis vibration exciting table cylinders (14) which are parallel to each other are arranged in the X-axis vibration exciting table (13), the Y-axis vibration exciting table (15) is arranged on the X-axis vibration exciting table cylinders (14) to move back and forth along the X-axis vibration exciting table cylinders (14), and the Y-axis vibration exciting platform (15) can vibrate along the X-axis vibration exciting table cylinders (14) under the action of the ultrasonic transducer,
the upper surface of the Y-axis vibration platform (15) is simultaneously provided with a plurality of Y-axis vibration platform cylinders (16) which are parallel to each other, the Z-axis vibration platform (17) is arranged on the Y-axis vibration platform cylinders (16) to move up and down along the Y-axis vibration platform cylinders (16), the Z-axis vibration platform (17) can vibrate along the Y-axis vibration platform cylinders (16) under the action of the ultrasonic transducer,
the surface of the Z-axis excitation platform (17) is provided with a vice for fixing the workpiece.
8. The auxiliary device for wire-cut electric discharge machining according to claim 7, comprising a DC excitation power supply for supplying DC power with adjustable magnitude to the horizontal magnetic field electromagnet and the vertical magnetic field electromagnet, wherein the adjustment of the magnitude of the horizontal magnetic field intensity and the magnitude of the vertical magnetic field intensity is realized by adjusting the magnitude of the DC power,
the magnetic induction intensity of the horizontal magnetic field is 200 mT-400 mT, and the magnetic induction intensity of the vertical magnetic field is 200 mT-400 mT.
9. The auxiliary device for wire electric discharge machining according to claim 8, wherein the horizontal magnetic field electromagnet and the vertical magnetic field electromagnet are each in a shape of a circular cake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910391682.6A CN110076402B (en) | 2019-05-13 | 2019-05-13 | Auxiliary device for wire cut electrical discharge machining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910391682.6A CN110076402B (en) | 2019-05-13 | 2019-05-13 | Auxiliary device for wire cut electrical discharge machining |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110076402A CN110076402A (en) | 2019-08-02 |
| CN110076402B true CN110076402B (en) | 2020-05-19 |
Family
ID=67419737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910391682.6A Active CN110076402B (en) | 2019-05-13 | 2019-05-13 | Auxiliary device for wire cut electrical discharge machining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110076402B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2060459B (en) * | 1979-08-30 | 1984-06-20 | Inoue Japax Res | Electrical discharge machining of small deep holes |
| CN87207295U (en) * | 1987-07-13 | 1988-03-09 | 上海仪表机械制造厂 | Magnetic work-table for wire-cutting machine tool |
| CN105344023A (en) * | 2015-12-01 | 2016-02-24 | 中国医学科学院生物医学工程研究所 | Device for generating vector noninvasive focusing electrical stimulation in combination with magnetic field and ultrasonic |
| CN106964857A (en) * | 2017-04-27 | 2017-07-21 | 华中科技大学 | A kind of householder method and device for Wire-cut Electrical Discharge Machining |
-
2019
- 2019-05-13 CN CN201910391682.6A patent/CN110076402B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110076402A (en) | 2019-08-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108213649B (en) | Material increase forming method and device for magnetic field control type electric arc robot | |
| Singh et al. | Review to EDM by using water and powder-mixed dielectric fluid | |
| Elhami et al. | Study of the current signal and material removal during ultrasonic-assisted electrochemical discharge machining | |
| Wang et al. | Micro wire electrode electrochemical cutting with low frequency and small amplitude tool vibration | |
| Oza et al. | Traveling wire electrochemical discharge machining (TW-ECDM) of quartz using zinc coated brass wire: investigations on material removal rate and kerf width characteristics | |
| Rattan et al. | Experimental set up to improve machining performance of silicon dioxide (quartz) in magnetic field assisted TW-ECSM process | |
| CN102166676A (en) | Method and device for machining insulating ceramic by reciprocating wire-cut electrical discharge machining | |
| Han et al. | Micro-electrochemical discharge cutting of glass using a surface-textured tool | |
| Tsai et al. | Vibration-assisted electrical discharge machining of grooves in a titanium alloy (Ti-6A-4V) | |
| Wang et al. | Use of micro ultrasonic vibration lapping to enhance the precision of microholes drilled by micro electro-discharge machining | |
| Lin et al. | Machining characteristics of a hybrid process of EDM in gas combined with ultrasonic vibration and AJM | |
| CN205129104U (en) | Ultrasonic vibration assists fine electrolysis spark -erosion wire cutting processingequipment | |
| CN106964857A (en) | A kind of householder method and device for Wire-cut Electrical Discharge Machining | |
| CN110340471A (en) | Laser induced plasma auxiliary electric spark complex machining device and method under magnetic fields | |
| CN111250746B (en) | Method and device for electromagnetic sound multi-field composite auxiliary drilling of tiny deep hole | |
| Sundaram et al. | Electrical and electrochemical processes | |
| CN105269094A (en) | Ultrasonic vibration auxiliary micro-electrochemical electrical discharge wire-cutting machining method and device | |
| Kumar et al. | Optimisation strategies in ultrasonic vibration assisted electrical discharge machining: a review | |
| Qu et al. | Enhancement of the homogeneity of micro slits prepared by wire electrochemical micromachining | |
| Singh et al. | Effect of rotating magnetic field and ultrasonic vibration on micro-EDM process | |
| CN104289775B (en) | Electrode compound motion is electrolysed cutting method | |
| CN110076402B (en) | Auxiliary device for wire cut electrical discharge machining | |
| Wang et al. | Research on electrochemical discharge-assisted diamond wire cutting of insulating ceramics | |
| Mukhopadhyay et al. | Advancement in ultrasonic vibration and magnetic field assisted micro-EDM process: An overview | |
| Davim et al. | Advanced (non-traditional) machining processes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |