CN116511628A - Positioning equipment and method for machining micro inverted cone hole and machining method - Google Patents

Positioning equipment and method for machining micro inverted cone hole and machining method Download PDF

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Publication number
CN116511628A
CN116511628A CN202310484452.0A CN202310484452A CN116511628A CN 116511628 A CN116511628 A CN 116511628A CN 202310484452 A CN202310484452 A CN 202310484452A CN 116511628 A CN116511628 A CN 116511628A
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China
Prior art keywords
wire
electrode
angle
distance
wire outlet
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CN202310484452.0A
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Chinese (zh)
Inventor
陈振华
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Beijing Huilang Times Technology Co Ltd
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Beijing Huilang Times Technology Co Ltd
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Priority to CN202310484452.0A priority Critical patent/CN116511628A/en
Publication of CN116511628A publication Critical patent/CN116511628A/en
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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
    • B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
    • B23H9/14—Making holes
    • 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
    • B23H7/26—Apparatus for moving or positioning electrode relatively to workpiece; Mounting of electrode
    • B23H7/30—Moving electrode in the feed direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Abstract

The invention discloses a positioning device, a positioning method and a positioning method for machining a micro inverted cone hole. The positioning device includes: the device comprises a rotating unit, a wire outlet adjusting unit, an electrode wire, a span detecting unit and a control unit; the rotating unit is used for driving the wire outlet adjusting unit and the electrode wire to rotate around the rotating shaft; the wire outlet adjusting unit is used for adjusting the wire outlet length and angle of the electrode wire; the span detection unit comprises a detection plane, the detection plane is perpendicular to the rotating shaft, and the span detection unit is used for detecting the span distance between two contact points contacted with the detection plane when the rotating angle of the electrode wire is a first angle and a second angle respectively under the condition that the wire outlet length and the wire outlet angle are equal; the control unit is used for controlling the rotation angle, the wire outlet length and the wire outlet angle of the electrode wire, and determining the focal distance between the focal point of the electrode wire rotation track and the bottom plane of the wire outlet adjusting unit according to the span distance and the wire outlet length and the wire outlet angle corresponding to the span distance. The invention can improve the processing efficiency and the yield.

Description

Positioning equipment and method for machining micro inverted cone hole and machining method
Technical Field
The embodiment of the invention relates to an automatic manufacturing technology, in particular to positioning equipment, a positioning method and a positioning method for machining a micro inverted cone hole.
Background
The electric spark machining is an important machining means in the field of micro-hole machining, and has the advantages of high precision and high yield.
The principle and the finished product of the machining method of the oil nozzle are shown in fig. 1, and the micro holes are all inverted cone holes, so that the micro electrode wires are required to be used for rotary electric discharge machining. In the processing process, the electrode wire is controlled to form a certain wire outlet angle with the processing plane of the processed plate, and then the electrode wire is controlled to rotate around the rotating shaft, so that the action track of the electrode wire forms a cone shape on the processed plate, and the micro-hole inner cavity of the processed plate is processed into an inverted cone shape.
However, the existing micro inverted cone hole processing scheme has lower processing efficiency and yield.
Disclosure of Invention
The invention provides positioning equipment, a positioning method and a positioning method for machining a micro inverted cone hole, which are used for improving the machining efficiency and the yield.
In a first aspect, an embodiment of the present invention provides a positioning apparatus for machining a fine inverted cone hole, the positioning apparatus including: the device comprises a rotating unit, a wire outlet adjusting unit, an electrode wire, a span detecting unit and a control unit;
The rotating unit is connected with the wire outlet adjusting unit, the wire outlet adjusting unit is connected with the electrode wire, and the rotating unit is used for driving the wire outlet adjusting unit and the electrode wire to rotate around a rotating shaft; the wire outlet adjusting unit is used for adjusting the wire outlet length and the wire outlet angle of the electrode wire;
the span detection unit comprises a detection plane, the detection plane is perpendicular to the rotating shaft, and the span detection unit is used for detecting the span distance between two contact points contacted with the detection plane when the rotation angle of the electrode wire is a first angle and a second angle respectively under the condition that the wire outlet length and the wire outlet angle are equal;
the control unit is respectively connected with the rotating unit, the wire outlet adjusting unit and the span detecting unit and is used for controlling the rotating angle, the wire outlet length and the wire outlet angle of the electrode wire, and determining the focal distance between the focal point of the rotating track of the electrode wire and the bottom plane of the wire outlet adjusting unit according to the span distance, the wire outlet length and the wire outlet angle corresponding to the span distance, wherein the difference between the first angle and the second angle is 180 degrees.
Optionally, the span detection unit further includes: the extension line of the resistance sensing strip is respectively in the same plane with the electrode wire with the rotation angle of the first angle and the electrode wire with the rotation angle of the second angle;
the first end of detection circuit with the wire electrode is connected, detection circuit's second end with the sampling end of resistance sensing strip is connected, detection circuit is used for when rotation angle is first angle just the wire electrode with resistance sensing strip contacts, measures first resistance between first end with second end when rotation angle is the second angle just the wire electrode with resistance sensing strip contacts, acquires first end with second resistance between the second end, and then according to first resistance with the second resistance confirms the span distance, wherein, the wire outlet hole with the sampling end is in the homonymy of rotation axis when rotation angle is first angle.
Optionally, the rotating unit is further configured to drive the wire outlet adjusting unit and the electrode wire to move along the extending direction of the rotating shaft.
In a second aspect, the embodiment of the invention further provides a positioning method for machining a micro inverted cone hole, which comprises the following steps:
adjusting the rotation angle of the electrode wire to be a first angle and adjusting the wire outlet angle of the electrode wire to be a preset angle;
controlling the tail end of the electrode wire to be in contact with the detection plane;
controlling the tail end of the electrode wire to leave the detection plane;
adjusting the rotation angle of the electrode wire to a second angle, wherein the difference between the first angle and the second angle is 180 degrees;
the tail end of the control electrode wire is contacted with the detection plane again;
detecting a span distance between contact points of the two contacts;
and determining the focal distance between the focal point of the electrode wire rotating track and the bottom plane of the wire outlet adjusting unit according to the span distance, the wire outlet length during contact and the preset angle.
Optionally, the controlling the wire electrode tip to contact the detection plane comprises:
controlling the electrode wire to continuously discharge until the tail end of the electrode wire is contacted with the detection plane;
controlling the tip of the wire electrode to leave the detection plane, comprising:
controlling the wire electrode to return to a preset length so that the tail end of the wire electrode leaves the detection plane;
The control electrode wire end is contacted with the detection plane again, and the control electrode wire comprises:
and controlling the electrode wire to continuously discharge until the tail end of the electrode wire is contacted with the detection plane again.
Optionally, the controlling the wire electrode tip to contact the detection plane comprises:
controlling the electrode wire to approach the detection plane along the extending direction of the rotating shaft until the tail end of the electrode wire contacts the detection plane;
controlling the tip of the wire electrode to leave the detection plane, comprising:
controlling the electrode wire to be far away from the detection plane along the extending direction of the rotating shaft so as to enable the tail end of the electrode wire to be far away from the detection plane;
the control electrode wire end is contacted with the detection plane again, and the control electrode wire comprises:
and controlling the electrode wire to approach the detection plane along the extending direction of the rotating shaft until the tail end of the electrode wire is contacted with the detection plane again.
Optionally, before detecting the span distance between the contact points of the two contacts, further comprising:
when the electrode wire is contacted with the detection plane for the first time, a first resistor between the electrode wire and a sampling end of the resistance sensing strip is obtained;
when the electrode wire is in second contact with the detection plane, acquiring a second resistance between the electrode wire and the sampling end of the resistance sensing strip;
Detecting a span distance between contact points of two contacts, comprising:
and determining the span distance between the contact points of the two contacts according to the first resistor and the second resistor.
Optionally, when the rotation angle of the electrode wire is a first angle, the wire outlet hole and the sampling end are on the same side of the rotation shaft;
according to the span distance, the wire outlet length during contact and the preset angle, determining the focal distance between the focal point of the wire electrode rotating track and the bottom plane of the wire outlet adjusting unit comprises the following steps:
under the condition that the first resistor is not equal to the second resistor, determining a focal distance between a focal point of the electrode wire rotating track and a bottom plane of the wire outlet adjusting unit according to the span distance, the wire outlet length during contact and the preset angle;
and under the condition that the first resistor is equal to the second resistor, determining the focal distance between the focal point of the electrode wire rotating track and the bottom plane of the wire outlet adjusting unit according to the wire outlet length during contact and the preset angle.
Optionally, in the case that the first resistance is not equal to the second resistance, determining a focal distance between a focal point of the wire electrode rotation track and a bottom plane of the wire outlet adjusting unit according to the span distance, the wire outlet length when in contact, and the preset angle includes:
Determining a first distance between the detection plane and the bottom plane of the wire outlet adjusting unit according to the wire outlet length during contact and the preset angle;
determining a second distance between a focus of the wire electrode rotating track and the detection plane according to the preset angle and the span distance;
determining the focal distance according to the sum of the first distance and the second distance under the condition that the first resistance is smaller than the second resistance;
and in the case that the first resistance is larger than the second resistance, determining the focal distance according to the difference between the first distance and the second distance.
In a third aspect, the embodiment of the present invention further provides a method for machining a fine inverted cone hole, where the method for machining a fine inverted cone hole includes: the positioning method for machining a fine inverted cone hole according to any of the second aspects.
According to the positioning equipment, the method and the processing method for processing the micro inverted cone hole, the control unit is respectively connected with the rotating unit, the wire outlet adjusting unit and the span detecting unit, the rotating angle, the wire outlet length and the wire outlet angle of the electrode wire can be controlled, the focal distance between the focal point of the rotating track of the electrode wire and the bottom plane of the wire outlet adjusting unit is determined according to the span distance, the wire outlet length and the wire outlet angle corresponding to the span distance, positioning work before processing the micro inverted cone hole is realized, the focal distance between the focal point of the rotating track of the electrode wire and the bottom plane of the wire outlet adjusting unit is accurately determined, the focal distance between the bottom plane of the wire outlet adjusting unit and a processed plate can be adjusted in the processing process, repeated correction and adjustment of manpower are avoided, irregular holes caused by unadjusted focal distances are prevented, and the processing efficiency and the rate of finished products are improved.
Drawings
FIG. 1 is a schematic diagram of a machining principle of a fine inverted cone hole in the prior art;
FIG. 2 is a schematic diagram of a finished product of a micro inverted cone hole in the prior art;
FIG. 3 is a schematic diagram of a machining principle of a special-shaped hole in the prior art;
FIG. 4 is a schematic view of another prior art machining principle of a special-shaped hole;
fig. 5 is a schematic diagram of a positioning device for machining a micro inverted cone hole according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a positioning principle of a positioning device for machining a micro inverted cone hole according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a positioning principle of another positioning device for machining a fine inverted cone hole according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a positioning principle of a positioning device for machining a fine inverted cone hole according to another embodiment of the present invention;
fig. 9 is a schematic diagram of the composition and principle of a positioning device for machining a micro inverted cone hole according to an embodiment of the present invention;
FIG. 10 is a schematic diagram of the composition and principle of another positioning device for machining micro inverted cone holes according to the embodiment of the present invention;
FIG. 11 is a schematic diagram of the composition and principle of a positioning device for machining a fine inverted cone hole according to an embodiment of the present invention;
Fig. 12 is a schematic flow chart of a positioning method for machining a micro inverted cone hole according to an embodiment of the present invention;
FIG. 13 is a schematic view of the shape of the cavity of a fine inverted cone hole according to an embodiment of the present invention;
FIG. 14 is a flow chart of another positioning method for machining a fine inverted cone hole according to an embodiment of the present invention;
FIG. 15 is a flow chart of a positioning method for machining a fine inverted cone hole according to an embodiment of the present invention;
FIG. 16 is a flow chart of a positioning method for machining a fine inverted cone hole according to an embodiment of the present invention;
fig. 17 is a schematic flow chart of a method for machining a micro inverted cone hole according to an embodiment of the invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
As described in the background art, the micro holes of the oil nozzle are reverse taper holes, the principle of the processing method is shown in fig. 1, and the top view of the finished plate is shown in fig. 2. Referring to fig. 1 and 2, the back taper hole is required to be subjected to rotary electric discharge machining using a fine wire electrode 101. In the machining process, the wire electrode 101 and the bottom plane of the wire outlet adjusting unit 102 are controlled to form a certain wire outlet angle a, and then the wire electrode 101 is controlled to rotate around the rotating shaft O, so that the action track of the wire electrode 101 forms a cone shape on the machined plate 103, and the micro-hole inner cavity 104 of the machined plate 103 is machined into an inverted cone shape. The efficiency and the yield of the existing micro inverted cone hole machining scheme are low, and the inventor researches find that the position determining part in the micro inverted cone hole machining scheme is a technical problem, and the distance D between the bottom plane of the wire adjusting unit 102 and the upper surface of the machined plate 103 needs to be determined so that the track focus in the rotating process of the electrode wire 101 is positioned on the upper surface of the machined plate 102, and therefore the effect that the diameter of the inlet 105 of the inverted cone hole is minimum is achieved. Multiple adjustments and proofreading are required in the position determination process to enable the track focus in the rotation process of the wire electrode 101 to be positioned on the upper surface of the processed plate 103, which wastes a great deal of workload and reduces the processing efficiency. However, if a mistake occurs in the adjustment and calibration process, the track focus cannot be set on the upper surface of the processed sheet 103, so that a special-shaped hole as shown in fig. 3 or 4 is produced, which affects the processing yield.
In order to solve the problems in the background art, the embodiment of the invention provides positioning equipment for machining a micro inverted cone hole. Fig. 5 is a schematic diagram of the composition of a positioning device for machining a micro inverted cone hole according to an embodiment of the present invention, and referring to fig. 5, a positioning device 500 for machining a micro inverted cone hole includes: a rotation unit 501, a wire-out adjustment unit 102, a wire electrode 101, a span detection unit 502, and a control unit 503. The rotating unit 501 is connected with the wire outlet adjusting unit 102, the wire outlet adjusting unit 102 is connected with the wire electrode 101, and the rotating unit 501 is used for driving the wire outlet adjusting unit 102 and the wire electrode 101 to rotate around a rotating shaft O. The wire outlet adjusting unit 102 is used for adjusting the wire outlet length L of the electrode wire 101 1 And a wire outlet angle a. The span detection unit 502 includes a detection plane 504, which is a detection planeThe plane 504 is perpendicular to the rotation axis O, and the span detection unit 502 is configured to detect the yarn length L 1 When the wire outlet angle a is equal to the wire outlet angle a, detecting a span distance between two contact points respectively contacting the detection plane 504 when the rotation angle of the wire electrode 101 is a first angle and a second angle; the control unit 503 is respectively connected with the rotation unit 501, the wire outlet adjusting unit 102 and the span detecting unit 502, and is used for controlling the rotation angle of the electrode wire 101 and the wire outlet length L 1 And the yarn outlet angle a is determined according to the span distance and the yarn outlet length L corresponding to the span distance 1 And the wire outlet angle a, and the position of the contact point and the wire outlet hole relative to the rotation axis O during contact, determining the focal distance between the focal point of the rotation track of the electrode wire 101 and the bottom plane of the wire outlet adjusting unit 102, wherein the difference between the first angle and the second angle is 180 degrees.
The rotating unit 501 is a rotatable component that can provide rotational power and drive the wire outlet adjusting unit 102 and the wire electrode 101 to rotate around the rotation axis O. The wire outlet adjusting unit 102 is capable of controlling the wire outlet angle a and the wire outlet length L of the electrode wire 101 1 Is provided. The wire electrode 101 is a wire which can generate pulse discharge with the sheet to be processed after being energized, and is a wire which has a certain mechanical strength and is in a straight and long shape, and can perform electric erosion cutting on the sheet to be processed by using high heat generated by the pulse discharge. The span detection unit 502 refers to a distance measurement assembly that detects the distance between two contact points where the wire electrode 101 contacts the detection plane 504 twice before and after in the case of different rotation angles. The control unit 503 is a controller of the rotating unit 501, the wire outlet adjusting unit 102 and the span detecting unit 502, and can control the rotating angle of the rotating unit 501, the wire outlet angle a and the wire outlet length L of the electrode wire 101 1 Can also be based on the span distance and the filament outlet length L 1 And the wire outlet angle a, determining the focal distance between the focal point of the track and the bottom plane of the wire outlet adjusting unit 102.
Specifically, the rotating unit 501 is connected to the yarn-feeding adjusting unit 102 and can driveThe wire-out adjusting unit 102 and the wire electrode 101 connected thereto are rotated about a rotation axis O, and the rotating unit 501 may include a motor, for example, a spindle of which may be fixedly connected with the wire-out adjusting unit 102 as the rotation axis O. The motor spindle can drive the wire outlet adjusting unit 102 and the wire electrode 101 to rotate around the rotation axis O in the rotating process, and the control unit 503 can adjust the rotation angle of the wire electrode 101 by controlling the running state of the motor. The wire outlet adjusting unit 102 comprises a bottom plane, a wire outlet hole can be arranged on the bottom plane, the wire outlet adjusting unit 102 can adjust the length of the electrode wire 101 extending out of the wire outlet hole, namely the wire outlet length L 1 . Illustratively, the wire-out adjusting unit 102 may adjust the wire-out length L by adjusting a distance between a clamp that fixedly clamps the electrode wire 101 and the wire-out hole 1 . The wire outlet adjusting unit 102 may also adjust an included angle between the electrode wire 101 and a bottom plane of the wire outlet adjusting unit 102, i.e. a wire outlet angle a. Illustratively, the wire-out adjusting unit 102 may adjust the wire-out angle a by adjusting the position of a jig that fixedly clamps the wire electrode 101. The span detection unit 502 is provided with a detection plane 504, the detection plane 504 being parallel to the bottom plane of the thread take-off adjustment unit 102. In the positioning process, the detection plane 504 is opposite to the bottom plane of the wire outlet adjusting unit 102, the wire electrode 101 contacts with the detection plane 504 under the condition that the rotation angle is the first angle and the second angle, and the wire outlet length L of the wire electrode 101 is ensured during the two contact 1 And the wire outlet angle a is equal. The span detection unit 502 may detect a distance between the two contact points, that is, a span distance. The span detection unit 502 may include a displacement sensing assembly, and the span detection unit 502 may be provided with at least one of a resistive displacement sensor, a capacitive displacement sensor, an electromagnetic wave ranging device, and the like, for example.
The control unit 503 is respectively connected with the rotation unit 501, the wire outlet adjusting unit 102 and the span detecting unit 502, so that the rotation angle of the rotation unit 501 driving the wire outlet adjusting unit 102 and the wire electrode 101 to rotate around the rotation axis O can be controlled, and the wire outlet length L of the wire electrode 101 can be controlled by controlling the working state of the wire outlet adjusting unit 102 1 And go out silkThe angle a is adjusted, and the span distance detected by the span detection unit 502 can be obtained according to the span distance and the wire outlet length L when the electrode wire 101 is contacted with the detection plane 504 1 And the wire exit angle a determines the focal distance between the focal point of the trajectory and the bottom plane of the wire exit adjustment unit 102. The control unit 503 is provided with an operator and a controller, and the control unit 503 may include at least one of an MCU chip and a single chip microcomputer, for example.
The parameter requirement for this process is, for example, that the yarn exit angle a is 60 °. In the positioning process, the control unit 503 controls the working state of the wire-drawing adjusting unit 102, and sets the wire-drawing angle a of the wire electrode 101 to 60 degrees. The control unit 503 controls the rotation unit 501 to rotate to set the rotation angle of the wire electrode 101 to a first angle. The control unit 503 controls the wire outlet adjusting unit 102 to outlet wires so that the tip of the electrode wire 101 is in contact with the detection plane 504, and at this time, the span detection unit 502 completes positioning of the first contact point. Further, the control unit 503 again controls the wire-out regulating unit 102 to return the wire so that the tip of the wire electrode 101 is moved away from the detection plane 504. The control unit 503 again controls the rotation unit 501 to rotate to set the rotation angle of the wire electrode 101 to the second angle. The control unit 503 controls the wire outlet adjusting unit 102 to outlet wires again, so that the tail end of the electrode wire 101 contacts with the detection plane 504 again, at this time, the span detection unit 502 completes positioning of the second contact point, and further completes data acquisition of the span distance between the two contact points. Fig. 6 is a schematic diagram of a positioning principle of a positioning device for machining a micro inverted cone hole according to an embodiment of the present invention, fig. 7 is a schematic diagram of a positioning principle of another positioning device for machining a micro inverted cone hole according to an embodiment of the present invention, fig. 8 is a schematic diagram of a positioning principle of another positioning device for machining a micro inverted cone hole according to an embodiment of the present invention, and in combination with fig. 5 and 6, in a first case, if a span distance L between two contact points cd is cd The control unit 503 is used for setting the yarn outlet angle a and the yarn outlet length L when the yarn outlet 601 and the contact point are respectively arranged at two sides of the rotation axis O during contact 1 And span distance L cd Substituting into the first formula The focal distance L can be obtained q . In the second case, referring to FIGS. 5 and 7, if the span distance L between the two contact points cd cd The control unit 503 is used for setting the yarn outlet angle a and the yarn outlet length L when the yarn outlet 601 and the contact point are on the same side of the rotation axis O when the yarn outlet is not 0 1 And span distance L ab Substitution of the second formula-> The focal distance L can be obtained q . In the third case, referring to fig. 5 and 8, if the span distance between the two contact points cd is 0, the control unit 503 will output the yarn angle a and the yarn length L 1 Substituting into the third formula L q ＝cos(90°-a)*L 1 The focal length L can be obtained q 。
The locating device for machining the micro inverted cone hole is provided with the rotating unit, the wire outlet adjusting unit, the electrode wire, the span detecting unit and the control unit, the control unit is respectively connected with the rotating unit, the wire outlet adjusting unit and the span detecting unit, the rotating angle, the wire outlet length and the wire outlet angle of the electrode wire can be controlled, the focal point distance between the focal point of the rotating track of the electrode wire and the bottom plane of the wire outlet adjusting unit is determined according to the span distance, the wire outlet length and the wire outlet angle corresponding to the span distance, the locating work before machining of the micro inverted cone hole is realized, the focal point distance between the focal point of the rotating track of the electrode wire and the bottom plane of the wire outlet adjusting unit is accurately determined, the distance between the bottom plane of the wire outlet adjusting unit and a machined plate is adjusted in the machining process to be equal to the focal point distance, the fact that the focal point distance is not adjusted is avoided, the abnormal holes are generated, and the machining efficiency and the rate of finished products are improved.
Optionally, fig. 9 is a schematic diagram of the composition and principle of a positioning device for machining a micro inverted cone hole according to an embodiment of the present invention, and referring to fig. 9, on the basis of the foregoing embodiment, the span detection unit 502 further includes: the resistance sensing strip 901 and the detection circuit 902, the resistance sensing strip 901 is arranged on the detection plane 504, and an extension line of the resistance sensing strip 901 is respectively in the same plane with the electrode wire with the rotation angle being the first angle and the electrode wire with the rotation angle being the second angle. The first end e of the detection circuit 902 is connected with the wire electrode (only the wire electrode with a rotation angle of 180 ° is shown), the second end f of the detection circuit 902 is connected with the sampling end of the resistance sensor strip 901, the detection circuit 902 is used for measuring the first resistance between the first end e and the second end f when the rotation angle is the first angle and the wire electrode contacts the resistance sensor strip 901, and obtaining the second resistance between the first end e and the second end f when the rotation angle is the second angle and the wire electrode contacts the resistance sensor strip 901, and further determining the span distance between the two contact points according to the first resistance and the second resistance, wherein the wire outlet 601 of the wire electrode with the rotation angle of the first angle is on the same side of the rotation axis O as the sampling end.
Specifically, the resistive sensor strip 901 is a strip-shaped resistive sensor provided on the detection plane 504, and when the position of the contact point with the tip of the wire electrode is different, the resistance between the sampling end of the resistive sensor strip 901 and the contact point is also changed. The detection circuit 902 is a sensing data analysis processing circuit, the first end e is connected with the electrode wire, and the second end f is connected with the sampling end. The detection circuit 902 may determine the displacement between the different points of contact by analyzing the difference in resistance between the first end e and the second end f.
The detection circuit 902 may be provided with a memory circuit, a comparison circuit and a processor, the detection circuit 902 being arranged to detect that the rotation angle is the first angle and that the electrode wire is connected toWhen the resistive sensor strip 901 contacts, a first resistance between the first end e and the second end f may be acquired and stored in the memory circuit. Further, the detection circuit 902 may collect a second resistance between the first end e and the second end f when the rotation angle is the second angle and the electrode wire is in contact with the resistance sensor strip 901, and store the second resistance in the storage circuit. The two comparison ends of the comparison circuit can be respectively connected into the first resistor and the second resistor and compare the relative relation (including equal, greater or smaller) between the first resistor and the second resistor. The processor may determine a span distance according to the material properties of the first resistor, the second resistor, and the resistor sensor strip 901, and the calculation formula of the span distance may be a fourth calculation formula L cd ＝|R 1 -R 2 S/(2 ρ), where L cd For span distance, R 1 R is the first resistance 2 S is the area of the cross section of the resistive sensor strip 901, ρ is the resistivity of the resistive sensor strip 901, and is a constant value determined by the nature of the material itself.
Further, the control unit 503 may determine the focal distance according to the relative relationship between the first resistance and the second resistance, the wire-out length, the wire-out angle a, and the span distance. Illustratively, if the first resistance is greater than the second resistance, the control unit 503 brings the wire payout angle, the wire payout length, and the span distance into a first formulaThe focal distance can be determined. Fig. 10 is a schematic diagram of the composition and principle of another positioning apparatus for machining a micro inverted cone hole according to an embodiment of the present invention, referring to fig. 10, if the first resistance is smaller than the second resistance, the control unit 503 brings the wire outlet angle, the wire outlet length and the span distance into the second formula>The focal distance can be determined. Fig. 11 is a schematic diagram of the composition and principle of another positioning device for machining a micro inverted cone hole according to an embodiment of the present invention, referring to fig. 11, if the first resistance and the second resistance are equal, the control unit 503Bringing the yarn outlet angle and the yarn outlet length into a third formula L q ＝cos(90°-a)*L 1 The focal distance can be found.
According to the positioning equipment for machining the micro inverted cone hole, provided by the embodiment, the displacement between the two contact points is detected by utilizing the resistance sensing strip and the detection circuit, the relative relation of the resistances between the two contact points and the sampling end is compared, the control unit can determine the focal distance according to the relative relation, the span distance, the wire outlet length corresponding to the span distance and the wire outlet angle, different relative relations correspond to different determination modes, the rapid and accurate determination of the focal distance is realized, and the positioning accuracy and efficiency are improved.
Optionally, with continued reference to fig. 5, the rotating unit 501 is further configured to drive the wire outlet adjusting unit 102 and the wire electrode 101 to move along the extending direction of the rotating shaft O. During positioning, the control unit 503 may adjust the distance between the end of the wire electrode 101 and the detection plane 504 by controlling the rotation unit 501 to move along the extending direction of the rotation axis O, so as to achieve contact and separation between the end of the wire electrode 101 and the detection plane 504.
The embodiment of the invention also provides a positioning method for machining the micro inverted cone hole, which can be implemented by the control unit in the positioning equipment for machining the micro inverted cone hole. Fig. 12 is a schematic flow chart of a positioning method for machining a micro inverted cone hole according to an embodiment of the present invention, and referring to fig. 12, the positioning method for machining a micro inverted cone hole includes:
And S901, adjusting the rotation angle of the electrode wire to be a first angle and adjusting the wire outlet angle of the electrode wire to be a preset angle.
Specifically, the initial rotation angle of the rotation unit is a certain value. By controlling the rotation of the rotation unit, the wire outlet adjustment unit and the electrode wire are driven to rotate around the rotation axis by a first angle, which may be 0 degrees, for example. The preset angle is the wire outlet angle of the electrode wire required by the fine inverted cone hole processing, and is a preset value determined according to requirements. The setting of the wire outlet angle can be completed by controlling the working state of the wire outlet adjusting unit. Fig. 13 is a schematic diagram of the shape of an inner cavity of a micro inverted cone hole according to an embodiment of the present invention, and in combination with fig. 13, the shape of the inner cavity of the micro inverted cone hole processed by the positioning method for micro inverted cone hole processing may be equivalent to a cone, and in order to make an included angle between a high line h of the cone and a generatrix L of the cone be a fixed angle, it is necessary to determine a wire outlet angle of a wire electrode to be a preset angle.
S902, the tail end of the control electrode wire is contacted with a detection plane.
Specifically, the tail end of the control electrode wire is contacted with the detection plane, and the wire discharging mode can be controlled by the wire discharging adjusting unit to continuously discharge wires, and the mode of shortening the distance between the detection plane and the bottom plane of the wire discharging adjusting unit can be also adopted. The wire-outlet control unit is illustratively controlled to continue the wire outlet until the tip of the electrode wire is in contact with the detection plane.
S903, the tail end of the control electrode wire is separated from the detection plane.
Specifically, similar to step S902, the tip of the wire electrode is controlled to leave the detection plane, by controlling the wire feeding adjustment unit to continuously feed back wire, or by increasing the distance between the detection plane and the bottom plane of the wire feeding adjustment unit. Illustratively, the wire outlet adjusting unit is controlled to continuously return the wire until the end of the wire electrode is separated from the detection plane, and the distance between the end of the wire electrode and the detection plane is a preset distance, for example, the preset distance may be 2 cm, and the preset distance is set to facilitate the adjustment of the rotation angle of the wire electrode in the next step.
And S904, adjusting the rotation angle of the electrode wire to be a second angle.
Specifically, the difference between the first angle and the second angle is 180 degrees. By controlling the rotation unit to rotate, the wire outlet adjusting unit and the electrode wire are driven to rotate around the rotation shaft, so that the rotation angle of the electrode wire is a second angle, and in the case that the first angle can be 0 degree, the second angle can be 180 degrees
S905, the tail end of the control electrode wire is contacted with the detection plane again.
Specifically, similar to step S902, the tip of the control electrode wire is again contacted with the detection plane, and the wire discharging adjustment unit may be controlled to continuously discharge the wire, or the distance between the detection plane and the bottom plane of the wire discharging adjustment unit may be shortened. The wire-outlet control unit is illustratively controlled to continue the wire outlet until the tip of the electrode wire is in contact with the detection plane. And the distance between the detection plane and the bottom plane of the yarn outlet adjusting unit is not changed between the first yarn outlet completion and the second yarn outlet completion, so that the yarn outlet length is kept consistent during two contact.
S906, detecting a span distance between contact points of the two contacts.
Specifically, detecting, by the span detection unit, the span distance between the contact points of the two contacts may include acquiring a position signal corresponding to the first contact point, acquiring a position signal corresponding to the second contact point, and determining the span distance from the two position signals. The span detection unit may be provided with at least one of a resistive displacement sensor, a capacitive displacement sensor, an electromagnetic wave ranging device, and the like.
S907, determining the focal distance between the focal point of the electrode wire rotating track and the bottom plane of the wire outlet adjusting unit according to the span distance, the wire outlet length during contact and the preset angle.
Specifically, the span distance detected by the span detection unit is obtained, and then the focal distance between the track focal point and the bottom plane of the wire outlet adjustment unit is determined according to the span distance, the wire outlet length and the wire outlet angle when the electrode wire is in contact with the detection plane.
In the first case, the control unit 503 is used for setting the wire outlet angle a and the wire outlet length L in the case that the wire outlet hole and the contact point are respectively positioned at two sides of the rotation axis O when the contact is made, as shown in fig. 5 and 6 1 And span distance L cd Carry over into the first formulaThe focal distance L can be obtained q . In the second case, referring to fig. 5 and 7, if the span distance between the two contact points is not 0, the control unit 503 is used for wire feeding during contactThe hole and the contact point are arranged on the same side of the rotation axis O, the yarn outlet angle a and the yarn outlet length L 1 And span distance L cd Carry over into the second formula->The focal distance L can be obtained q . In a third case, referring to fig. 5 and 8, if the span distance between the two contact points is 0, the control unit 503 will output the yarn angle a and the yarn length L 1 Brought into the first formula L q ＝cos(90°-a)*L 1 The focal length L can be obtained q 。
In the positioning method for machining the micro inverted cone hole, the rotation angle of the electrode wire is adjusted to be a first angle, the wire outlet angle of the electrode wire is adjusted to be a preset angle, and then the tail end of the electrode wire is controlled to be in contact with the detection plane twice under the condition that the rotation angles are the first angle and the second angle respectively, wherein the wire outlet length of the electrode wire is equal during the two contact times. The span distance between contact points of the two contacts is detected, and then the focal distance between the focal point of the electrode wire rotating track and the bottom plane of the wire outlet adjusting unit is determined according to the span distance, the wire outlet length during contact and the preset angle, so that the positioning work before machining of the micro back taper holes is realized, the focal distance between the focal point of the electrode wire rotating track and the bottom plane of the wire outlet adjusting unit is accurately determined, the distance between the bottom plane of the wire outlet adjusting unit and a machined plate can be adjusted in the machining process to be equal to the focal distance, repeated manual correction and adjustment are avoided, abnormal holes caused by unadjusted focal distances are prevented, and the machining efficiency and the yield are improved.
Fig. 14 is a flow chart of another positioning method for machining a micro inverted cone hole according to an embodiment of the present invention, and referring to fig. 14, the positioning method for machining a micro inverted cone hole includes:
s1001, adjusting the rotation angle of the electrode wire to be a first angle and adjusting the wire outlet angle of the electrode wire to be a preset angle.
The content of step S1001 is the same as that of step S901, and will not be described here again.
S1002, controlling the electrode wire to continuously discharge until the tail end of the electrode wire is contacted with the detection plane.
Specifically, under the condition that the distance between the detection plane and the bottom plane of the wire outlet adjusting unit is unchanged, the wire outlet adjusting unit is controlled to control the wire electrode to continuously outlet wires until the tail end of the wire electrode is in contact with the detection plane. For example, the method of detecting whether the tip of the wire electrode is in contact with the detection plane may be to determine whether the span detection unit has acquired a new position signal.
S1003, controlling the wire electrode to return to a preset length so as to enable the tail end of the wire electrode to leave the detection plane.
Specifically, under the condition that the distance between the detection plane and the bottom plane of the wire outlet adjusting unit is unchanged, the wire outlet adjusting unit is controlled to control the wire electrode to continuously return wire until the tail end of the wire electrode leaves the detection plane. For example, the method of detecting whether the wire electrode tip is out of the detection plane may be to determine whether the position signal acquired by the span detection unit is interrupted.
S1004, adjusting the rotation angle of the wire electrode to be a second angle.
The content of step S1004 is the same as that of step S904, and will not be described here again.
S1005, controlling the electrode wire to continuously discharge until the tail end of the electrode wire is contacted with the detection plane again.
Specifically, similar to step S1002, in the case where the distance between the detection plane and the bottom plane of the wire-out adjusting unit is unchanged, the wire-out adjusting unit is controlled to control the wire electrode to continue wire-out until the tip of the wire electrode is in contact with the detection plane. It should be noted in particular that the distance between the detection plane and the bottom plane of the wire-outlet adjustment unit is constant between the two contacts, so that the wire-outlet length L1 of the wire electrode is the same between the two contacts. For example, the method of detecting whether the tip of the wire electrode is in contact with the detection plane may be to determine whether the span detection unit has acquired a new position signal.
S1006, detecting the span distance between contact points of the two contacts.
S1007, determining the focal distance between the focal point of the electrode wire rotating track and the bottom plane of the wire outlet adjusting unit according to the span distance, the wire outlet length during contact and the preset angle.
The step S1006 and the step S1007 are the same as the content of the step S906 and the step S907, respectively, and are not described herein.
According to the positioning method for machining the micro inverted cone hole, the tail end of the electrode wire is contacted with the detection plane twice in the wire outlet and wire return modes, and the distance between the detection plane and the bottom plane of the wire outlet adjusting unit is unchanged between the two contacts, so that the wire outlet length of the electrode wire is the same when the electrode wire is contacted twice. And further, the span distance between the two contact points is obtained, and then, the focal distance between the focal point of the electrode wire rotating track and the bottom plane of the wire outlet adjusting unit is determined according to the span distance, the wire outlet length and the wire outlet angle corresponding to the span distance, so that the focal distance is rapidly and accurately determined, and the positioning accuracy and efficiency are improved.
Fig. 15 is a flow chart of another positioning method for machining a micro inverted cone hole according to an embodiment of the present invention, and referring to fig. 15, the positioning method for machining a micro inverted cone hole includes:
s1101, adjusting the rotation angle of the electrode wire to be a first angle and adjusting the wire outlet angle of the electrode wire to be a preset angle.
The content of step S1101 is the same as that of step S901, and will not be described here again.
And 1102, controlling the electrode wire to approach the detection plane along the extending direction of the rotating shaft until the tail end of the electrode wire contacts the detection plane.
Specifically, before the control wire electrode approaches the detection plane along the extending direction of the rotating shaft, the wire outlet length of the control wire electrode needs to be controlled to be a preset value, so that the wire electrode protrudes from the wire outlet hole, and the contact between the tail end of the wire electrode and the detection plane can be realized later. Furthermore, under the condition that the wire outlet length of the electrode wire is unchanged, the control rotating unit drives the wire outlet adjusting unit and the electrode wire to approach the detection plane along the extending direction of the rotating shaft until the tail end of the electrode wire contacts the detection plane. For example, the method of detecting whether the tip of the wire electrode is in contact with the detection plane may be to determine whether the span detection unit has acquired a new position signal.
And S1103, controlling the electrode wire to be far away from the detection plane along the extending direction of the rotating shaft so as to enable the tail end of the electrode wire to be far away from the detection plane.
Specifically, under the condition that the wire outlet length of the electrode wire is unchanged, the control rotating unit drives the wire outlet adjusting unit and the electrode wire to be far away from the detection plane along the extending direction of the rotating shaft until the tail end of the electrode wire is far away from the detection plane. For example, the method of detecting whether the wire electrode tip is out of the detection plane may be to determine whether the position signal acquired by the span detection unit is interrupted.
And S1104, adjusting the rotation angle of the electrode wire to be a second angle.
Step S1104 is the same as the foregoing step S904, and will not be described herein.
S1105, controlling the electrode wire to approach the detection plane along the extending direction of the rotating shaft until the tail end of the electrode wire contacts the detection plane again.
Specifically, similar to step S1102, under the condition that the wire outlet length of the wire electrode is unchanged, the control rotation unit drives the wire outlet adjusting unit and the wire electrode to approach the detection plane along the extending direction of the rotation shaft until the tail end of the wire electrode contacts the detection plane again. For example, the method of detecting whether the tip of the wire electrode is in contact with the detection plane may be to determine whether the span detection unit has acquired a new position signal.
S1106, detecting a span distance between contact points of the two contacts.
S1107, determining the focal distance between the focal point of the electrode wire rotating track and the bottom plane of the wire outlet adjusting unit according to the span distance, the wire outlet length during contact and the preset angle.
Step S1106 and step S1107 are the same as the content of step S906 and step S907, respectively, and are not described herein.
According to the positioning method for machining the micro inverted cone hole, the distance between the tail end of the electrode wire and the detection plane is adjusted by controlling the rotating unit to move along the extending direction of the rotating shaft, so that the tail end of the electrode wire is contacted with the detection plane twice, and the wire outlet length of the electrode wire between the two contacts is kept unchanged. And further, the span distance between the two contact points is obtained, and then, the focal distance between the focal point of the electrode wire rotating track and the bottom plane of the wire outlet adjusting unit is determined according to the span distance, the wire outlet length and the wire outlet angle corresponding to the span distance, so that the focal distance is rapidly and accurately determined, and the positioning accuracy and efficiency are improved.
Fig. 16 is a flow chart of another positioning method for machining a micro inverted cone hole according to an embodiment of the present invention, and referring to fig. 16, the positioning method for machining a micro inverted cone hole includes:
and S1201, adjusting the rotation angle of the electrode wire to be a first angle and adjusting the wire outlet angle of the electrode wire to be a preset angle.
S1202, the tail end of the control electrode wire is contacted with the detection plane.
The steps S1201 and S1202 are the same as the steps S901 and S902, respectively, and are not described herein.
And S1203, when the electrode wire is contacted with the detection plane for the first time, acquiring a first resistance between the electrode wire and the sampling end of the resistance sensing strip.
Specifically, a first resistance between the electrode wire and the sampling end of the resistance sensor strip is obtained through a detection circuit in the span detection unit. Since the wire electrode is a metal conductor, the resistance of which may be approximately equal to 0, the first resistance may be regarded as the resistance of the resistive sensor strip portion between the contact point at the first contact and the sampling end. In particular, when the rotation angle of the wire electrode is the first angle, the wire outlet and the sampling end are on the same side of the rotation axis.
And S1204, controlling the tail end of the electrode wire to leave the detection plane.
And S1205, adjusting the rotation angle of the electrode wire to be a second angle.
S1206, the tail end of the control electrode wire is contacted with the detection plane again.
The content of the steps S1204, S1205, and S1206 is the same as that of the steps S903, S904, and S905, respectively, and will not be described here again.
S1207, when the electrode wire is in second contact with the detection plane, acquiring a second resistance between the electrode wire and the sampling end of the resistance sensor strip.
Specifically, a second resistance between the electrode wire and the sampling end of the resistance sensor strip is obtained through a detection circuit in the span detection unit. Since the wire electrode is a metal conductor, the resistance of which may be approximately equal to 0, the second resistance may be regarded as the resistance of the resistive sensor strip portion between the contact point at the second contact and the sampling end.
S1208, determining the span distance between the contact points of the two contacts according to the first resistor and the second resistor.
Specifically, this step may be performed by the control unit controlling the detection circuit, or may be performed by the control unit based on the acquired first resistance and second resistance. In the case where the first resistance is equal to the second resistance, the span distance between the contact points of the two contacts is equal to zero. Under the condition that the first resistance is equal to the second resistance, the span distance between the contact points of the two contacts can be calculated by putting the first resistance and the second resistance into a fourth calculation formula, wherein the fourth calculation formula is L cd ＝|R 1 -R 2 S/(2 ρ), where L cd For span distance, R 1 R is the first resistance 2 The second resistance, S, is the area of the cross section of the resistive sensor strip, ρ is the resistivity of the resistive sensor strip, and is a constant value determined by the nature of the material itself.
S1209, determining the focal distance between the focal point of the electrode wire rotating track and the bottom plane of the wire outlet adjusting unit according to the span distance, the wire outlet length during contact and the preset angle under the condition that the first resistor is not equal to the second resistor.
Specifically, referring to fig. 5, 6 and 7, a first distance between the detection plane 504 and the bottom plane of the wire-outlet adjusting unit 102 is determined according to the wire-outlet length and the preset angle during contact, and the calculation formula may be D 1 ＝cos(90°-a)*L 1 Wherein D is 1 For detecting plane 504 and wire-out adjusting unit102, a is the wire outlet angle, which is equal to a preset angle, L 1 Is the filament length. Secondly, determining a second distance between the focus of the rotation track of the wire electrode 101 and the detection plane 504 according to the preset angle and the span distance, wherein the calculation formula can be as followsWherein D is 2 To detect the second distance between the plane 504 and the bottom plane of the payout adjusting unit 102, a is the payout angle, L cd Is a span distance. In the case where the first resistance is greater than the second resistance, the focal distance is determined from the difference between the first distance and the second distance. The focal distance is equal to the first distance minus the second distance. In the case where the first resistance is smaller than the second resistance, the focal distance is determined from the sum of the first distance and the second distance. The focal distance is equal to the sum of the first distance and the second distance.
S1210, under the condition that the first resistance is equal to the second resistance, determining the focal distance between the focal point of the electrode wire rotating track and the bottom plane of the wire outlet adjusting unit according to the wire outlet length and the preset angle when in contact
Specifically, referring to fig. 5 and fig. 8, the first resistor is equal to the second resistor, which can indicate that the contact points of the two contacts overlap, and the contact point is the focal point of the rotation track of the pole wire. Under the condition that the first resistance is equal to the second resistance, determining the focal distance between the bottom plane of the wire outlet adjusting unit 102 and the focal point of the rotating track of the electrode wire 101 according to the wire outlet length and the preset angle when in contact, wherein the calculation formula is a third formula L q ＝cos(90°-a)*L 1 Wherein D is 1 For a first distance between the detection plane 504 and the bottom plane of the wire feeding adjustment unit 102, a is the wire feeding angle, which is equal to a preset angle, L 1 Is the filament length.
According to the positioning method for machining the micro inverted cone hole, a calculation mode of a focal distance is determined according to the relative relation between resistance values in two times of contact, and the focal distance between a focal point of a wire electrode rotating track and a bottom plane of a wire electrode adjusting unit is determined according to the span distance, the wire outlet length in the contact and a preset angle under the condition that the first resistance is not equal to the second resistance. Under the condition that the first resistor is equal to the second resistor, the focal distance between the focal point of the electrode wire rotating track and the bottom plane of the wire outlet adjusting unit is determined according to the wire outlet length and the preset angle during contact, so that the focal point is rapidly and accurately positioned, and the positioning accuracy is improved by means of automatic adjustment and data analysis.
The embodiment of the invention also provides a micro inverted cone hole processing method, which can be implemented by the control unit. Fig. 17 is a schematic flow chart of a method for machining a micro inverted cone hole according to an embodiment of the present invention, and referring to fig. 17, the method for machining a micro inverted cone hole includes:
s1301, adjusting the rotation angle of the electrode wire to be a first angle and adjusting the wire outlet angle of the electrode wire to be a preset angle.
S1302, the tail end of the control electrode wire is contacted with a detection plane.
S1303, the tail end of the control electrode wire leaves the detection plane.
And 1304, adjusting the rotation angle of the wire electrode to a second angle.
S1305, the tail end of the control electrode wire is contacted with the detection plane again.
S1306, detecting the span distance between the contact points of the two contacts.
S1307, determining the focal distance between the focal point of the electrode wire rotating track and the bottom plane of the wire outlet adjusting unit according to the span distance, the wire outlet length during contact and the preset angle.
Steps S1301, S1302, S1303, S1304, S1305, S1306 and S1308 are the same as the one-to-one correspondence of the foregoing steps S901, S902, S903, S904, S905, S906 and S907, respectively, and will not be repeated here.
S1308, controlling the rotating shaft to be perpendicular to the machining plane of the plate to be machined, so that the intersection point of the extending line of the rotating shaft and the machining plane is the point to be machined.
Specifically, the mode that the rotating shaft is perpendicular to the machining plane of the machined plate can be controlled, namely, the machined plate is used for replacing the detection plane, and the wire outlet adjusting unit and the electrode wire are driven by the rotating unit to move to the machined plate.
And S1309, adjusting the distance between the bottom plane of the wire outlet adjusting unit and the machining plane to be equal to the focal distance.
Specifically, the bottom plane of the wire outlet adjusting unit can be firstly controlled to be attached to the processing plane, and then the rotating unit is controlled to be far away from the processing plane along the extending direction of the rotating shaft, wherein the far-away displacement is equal to the focal distance.
And S1310, performing electric spark machining on the machined plate.
According to the positioning device, the positioning method and the positioning method for machining the micro inverted cone hole, the tail end of the electrode wire is contacted with the detection plane twice in the wire outlet and wire return modes, and the distance between the detection plane and the bottom plane of the wire outlet adjusting unit is unchanged between the two contacts, so that the wire outlet length of the electrode wire is the same when the electrode wire is contacted twice. And further, the span distance between the two contact points is obtained, and then, the focal distance between the focal point of the electrode wire rotating track and the bottom plane of the wire outlet adjusting unit is determined according to the span distance, the wire outlet length and the wire outlet angle corresponding to the span distance, so that the focal distance is rapidly and accurately determined, and the processing accuracy and efficiency are improved.
The product can execute the method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

Claims (10)

1. Positioning equipment for machining micro inverted cone holes, which is characterized by comprising: the device comprises a rotating unit, a wire outlet adjusting unit, an electrode wire, a span detecting unit and a control unit;
the rotating unit is connected with the wire outlet adjusting unit, the wire outlet adjusting unit is connected with the electrode wire, and the rotating unit is used for driving the wire outlet adjusting unit and the electrode wire to rotate around a rotating shaft; the wire outlet adjusting unit is used for adjusting the wire outlet length and the wire outlet angle of the electrode wire;
the span detection unit comprises a detection plane, the detection plane is perpendicular to the rotating shaft, and the span detection unit is used for detecting the span distance between two contact points contacted with the detection plane when the rotation angle of the electrode wire is a first angle and a second angle respectively under the condition that the wire outlet length and the wire outlet angle are equal;
the control unit is respectively connected with the rotating unit, the wire outlet adjusting unit and the span detecting unit and is used for controlling the rotating angle, the wire outlet length and the wire outlet angle of the electrode wire, and determining the focal distance between the focal point of the rotating track of the electrode wire and the bottom plane of the wire outlet adjusting unit according to the span distance, the wire outlet length and the wire outlet angle corresponding to the span distance, wherein the difference between the first angle and the second angle is 180 degrees.
2. The positioning apparatus for fine inverted cone hole machining according to claim 1, wherein the span detection unit further comprises: the extension line of the resistance sensing strip is respectively in the same plane with the electrode wire with the rotation angle of the first angle and the electrode wire with the rotation angle of the second angle;
the first end of detection circuit with the wire electrode is connected, detection circuit's second end with the sampling end of resistance sensing strip is connected, detection circuit is used for when rotation angle is first angle just the wire electrode with resistance sensing strip contacts, measures first resistance between first end with second end when rotation angle is the second angle just the wire electrode with resistance sensing strip contacts, acquires first end with second resistance between the second end, and then according to first resistance with the second resistance confirms the span distance, wherein, the wire outlet hole with the sampling end is in the homonymy of rotation axis when rotation angle is first angle.
3. The positioning device for machining a fine inverted cone hole according to claim 1, wherein the rotating unit is further configured to drive the wire-out adjusting unit and the wire electrode to move in an extending direction of the rotating shaft.
4. The positioning method for machining the micro inverted cone hole is characterized by comprising the following steps of:
adjusting the rotation angle of the electrode wire to be a first angle and adjusting the wire outlet angle of the electrode wire to be a preset angle;
controlling the tail end of the electrode wire to be in contact with the detection plane;
controlling the tail end of the electrode wire to leave the detection plane;
adjusting the rotation angle of the electrode wire to a second angle, wherein the difference between the first angle and the second angle is 180 degrees;
the tail end of the control electrode wire is contacted with the detection plane again;
detecting a span distance between contact points of the two contacts;
and determining the focal distance between the focal point of the electrode wire rotating track and the bottom plane of the wire outlet adjusting unit according to the span distance, the wire outlet length during contact and the preset angle.
5. The positioning method for machining a fine inverted cone hole according to claim 4, wherein controlling the wire electrode tip to be in contact with the detection plane comprises:
Controlling the electrode wire to continuously discharge until the tail end of the electrode wire is contacted with the detection plane;
controlling the tip of the wire electrode to leave the detection plane, comprising:
controlling the wire electrode to return to a preset length so that the tail end of the wire electrode leaves the detection plane;
the control electrode wire end is contacted with the detection plane again, and the control electrode wire comprises:
and controlling the electrode wire to continuously discharge until the tail end of the electrode wire is contacted with the detection plane again.
6. The positioning method for machining a fine inverted cone hole according to claim 4, wherein controlling the wire electrode tip to be in contact with the detection plane comprises:
controlling the electrode wire to approach the detection plane along the extending direction of the rotating shaft until the tail end of the electrode wire contacts the detection plane;
controlling the tip of the wire electrode to leave the detection plane, comprising:
controlling the electrode wire to be far away from the detection plane along the extending direction of the rotating shaft so as to enable the tail end of the electrode wire to be far away from the detection plane;
the control electrode wire end is contacted with the detection plane again, and the control electrode wire comprises:
and controlling the electrode wire to approach the detection plane along the extending direction of the rotating shaft until the tail end of the electrode wire is contacted with the detection plane again.
7. The positioning method for fine inverted cone hole processing according to any one of claims 4 to 6, further comprising, before detecting a span distance between contact points of two contacts:
when the electrode wire is contacted with the detection plane for the first time, a first resistor between the electrode wire and a sampling end of the resistance sensing strip is obtained;
when the electrode wire is in second contact with the detection plane, acquiring a second resistance between the electrode wire and the sampling end of the resistance sensing strip;
detecting a span distance between contact points of two contacts, comprising:
and determining the span distance between the contact points of the two contacts according to the first resistor and the second resistor.
8. The positioning method for machining a micro inverted cone hole according to claim 7, wherein when the rotation angle of the electrode wire is a first angle, the wire outlet hole and the sampling end are on the same side of the rotation shaft;
according to the span distance, the wire outlet length during contact and the preset angle, determining the focal distance between the focal point of the wire electrode rotating track and the bottom plane of the wire outlet adjusting unit comprises the following steps:
under the condition that the first resistor is not equal to the second resistor, determining a focal distance between a focal point of the electrode wire rotating track and a bottom plane of the wire outlet adjusting unit according to the span distance, the wire outlet length during contact and the preset angle;
And under the condition that the first resistor is equal to the second resistor, determining the focal distance between the focal point of the electrode wire rotating track and the bottom plane of the wire outlet adjusting unit according to the wire outlet length during contact and the preset angle.
9. The positioning method for machining a fine inverted cone hole according to claim 8, wherein, in the case where the first resistance is not equal to the second resistance, determining a focal distance between a focal point of the wire electrode rotation locus and a bottom plane of the wire outlet adjusting unit according to the span distance, the wire outlet length at the time of contact, and the preset angle, comprises:
determining a first distance between the detection plane and the bottom plane of the wire outlet adjusting unit according to the wire outlet length during contact and the preset angle;
determining a second distance between a focus of the wire electrode rotating track and the detection plane according to the preset angle and the span distance;
determining the focal distance according to the sum of the first distance and the second distance under the condition that the first resistance is smaller than the second resistance;
and in the case that the first resistance is larger than the second resistance, determining the focal distance according to the difference between the first distance and the second distance.
10. A method for machining a micro back taper hole is characterized by comprising the following steps: a positioning method for fine inverted cone hole processing according to any one of claims 4 to 9.
CN202310484452.0A 2023-04-28 2023-04-28 Positioning equipment and method for machining micro inverted cone hole and machining method Pending CN116511628A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117139759A (en) * 2023-10-31 2023-12-01 赫比(成都)精密塑胶制品有限公司 Machining method of multi-section special-shaped conical hole and workpiece

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117139759A (en) * 2023-10-31 2023-12-01 赫比(成都)精密塑胶制品有限公司 Machining method of multi-section special-shaped conical hole and workpiece
CN117139759B (en) * 2023-10-31 2024-01-23 赫比(成都)精密塑胶制品有限公司 Machining method of multi-section special-shaped conical hole and workpiece

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