CN113492237A

CN113492237A - Complex curved surface magnetic steel sheet wire cut electrical discharge machining device, cutting machine frame and cutting method

Info

Publication number: CN113492237A
Application number: CN202110899905.7A
Authority: CN
Inventors: 饶佩明
Original assignee: Jiangsu Dongqing Cnc Machine Tool Co ltd
Current assignee: Jiangsu Dongqing Cnc Machine Tool Co ltd
Priority date: 2020-03-25
Filing date: 2020-03-25
Publication date: 2021-10-12
Anticipated expiration: 2040-03-25
Also published as: CN111266681A; CN113492237B

Abstract

The invention discloses a complicated curved surface magnetic steel sheet wire cut electrical discharge machining device, a cutting machine frame and a cutting method, and belongs to the technical field of wire cut electrical discharge machining, and the device comprises the following components: the magnetic ring piece can be detachably fixed on the positioning base surface; the numerical control rotary table is provided with a rotary table main body, and the workpiece fixture is fixed on the rotary table main body. The invention adopts the complex curved surface magnetic steel sheet wire cut electrical discharge machining device to carry out the wire cut electrical discharge machining process, accords with the brittle and hard characteristics of materials, can obtain high utilization rate and high efficiency of the materials, solves the problem of blank, shortens the initial machining time, and ensures the shape and size, the curved surface thickness and the surface quality of a single piece.

Description

Complex curved surface magnetic steel sheet wire cut electrical discharge machining device, cutting machine frame and cutting method

Technical Field

The invention relates to the technical field of wire cut electrical discharge machining, in particular to a magnetic steel sheet wire cut electrical discharge machining device with a complex curved surface, a magnetic ring sheet cutting device and a cutting method thereof.

Background

With the rapid development of the world economy and scientific technology, the application and the demand of the magnetic material are unprecedentedly wide. The machining of special-shaped and curved parts such as a motor rotor and a bearing bush made of magnetic materials is accompanied.

In view of the magnetic rotor structure and processing requirements: the magnetic rotor is formed by assembling 8 magnetizing magnetic ring sheets of an inner layer and an outer layer, and due to the working condition characteristics and the magnetizing direction, as shown in fig. 24, an inner magnetic ring N and an outer magnetic ring W cannot be a complete conical ring and must be assembled by independent single magnetic rings. Therefore, the degree of coincidence between each piece and the precision of the curved annular surface become the difficulty and key of the processing technology when the single magnet ring is processed and assembled. Because the material of the magnetic ring is neodymium iron boron (38SH), the inherent characteristics of brittleness and hardness of the magnetic ring have very high requirements on processing equipment and a processing method, for example, a process route of metal milling and grinding is adopted, a cutter and a tool are difficult to solve, the quality is difficult to guarantee, and the efficiency is not high.

Disclosure of Invention

The invention aims to provide a magnetic steel sheet wire cut electrical discharge machining device with a complex curved surface, a cutting machine frame and a cutting method, which are used for solving the technical problems in the prior art and providing machining quality and efficiency.

In order to achieve the purpose, the invention provides the following scheme:

the invention discloses a complicated curved surface magnetic steel sheet wire cut electric discharge machining device, which comprises:

the magnetic ring piece can be detachably fixed on the positioning base surface;

the numerical control rotary table is provided with a rotary table main body, and the workpiece fixture is fixed on the rotary table main body.

Preferably, the positioning base surface is an inclined surface, and a workpiece positioning strip can be detachably fixed on a side wall of the positioning base surface.

Preferably, can dismantle on the location base and be connected with supplementary anchor clamps, supplementary anchor clamps include the anchor clamps main part, the preceding ability of anchor clamps main part is dismantled and is connected with a plurality of briquetting, the back of anchor clamps main part can be dismantled and is connected with the anchor clamps locating piece, the upper surface of anchor clamps main part can be dismantled and is connected with the layering, the lower surface of anchor clamps main part is equipped with the location benchmark, it is protruding that the location benchmark is the bar, be equipped with the location benchmark notch on the location base, the location benchmark can be located in the location benchmark notch.

Preferably, the lateral wall of numerical control revolving stage can be dismantled and be connected with a revolving stage horizontal bar, the both ends of revolving stage horizontal bar can be dismantled respectively and be connected with a revolving stage vertical bar, every can dismantle on the revolving stage vertical bar and be connected with a conductive component.

Preferably, the conductive assembly comprises an electric brush support fixing seat, two ends of the electric brush support fixing seat are respectively connected with a jaw in a rotating mode, each jaw is provided with an electric brush, an electric brush spring can be detachably connected between the two jaws, the electric brush support fixing seat is provided with a fixing seat center hole, an insulating rod can be detachably connected in the fixing seat center hole, and one end of the electric brush support fixing seat can be detachably connected with a conductive column.

Preferably, the work holder is fixed to a first face of a station rotating disk, and a second face of the station rotating disk is fixed to the turntable main body.

Preferably, the numerical control rotary table can be detachably connected to the rotary table mounting seat, the rotary table mounting seat is provided with a mounting inclined plane, a plurality of mounting fixture blocks are fixed on the mounting inclined plane, and the numerical control rotary table can be detachably connected to the mounting fixture blocks.

Preferably, the turntable mounting base is detachably fixed on the machine tool workbench.

The invention also discloses a cutting machine frame, which comprises the complex curved surface magnetic steel sheet wire cut electric discharge machining device as claimed in any one of claims 1 to 8, wherein the complex curved surface magnetic steel sheet wire cut electric discharge machining device is fixed on a main machine bed, a wire storage cylinder, a machine bed upper wire frame and a machine bed lower wire frame are arranged on the main machine bed, and a machine bed cone structure is arranged on the machine bed upper wire frame.

The invention also discloses a cutting method, which is characterized by comprising the following steps:

step S1, clamping the blank on a workpiece fixture, and rotating the numerical control rotary table to enable the positioning base surface of the station rotary table to be in a horizontal position;

step S2, firstly, the blank is tightly attached to the front reference block and the first side reference end face, the bolt is locked, and then the front reference block is removed;

step S3, adjusting and calibrating the cutting molybdenum wire to enable the cutting molybdenum wire to lightly touch sparks on two side faces of the blank, recording machine tool coordinate values of the two times, and carrying out neutralization on the two coordinate values;

s4, rotating the numerical control rotary table, adjusting the relative position of the rotary table and the workpiece, enabling the molybdenum wire to be located at the median position, setting the station rotary table to rotate, enabling the molybdenum wire to cut along the path 1 in the rotating process, adjusting the relative position of the molybdenum wire and the workpiece after the molybdenum wire is cut for the first time, setting the station rotary table to rotate reversely again, enabling the molybdenum wire to cut for the second time along the path 2 in the rotating process, and finishing the primary processing of the outer magnetic ring piece;

s5, adjusting the relative position of the molybdenum wire and the workpiece, setting the station rotating disc to rotate, enabling the molybdenum wire to cut the workpiece for the third time along the path 3 in the rotating process, adjusting the relative position of the molybdenum wire and the workpiece after the third time cutting, setting the station rotating disc to rotate again, enabling the molybdenum wire to cut the workpiece for the fourth time along the path 4 in the rotating process, and completing the primary processing of the inner magnetic ring piece after the fourth time cutting;

step S6, placing the cut outer magnetic ring pieces and inner magnetic ring pieces in groups;

step S7, enabling the positioning base surface of the station rotating disc to be in a horizontal position; taking the first side reference as a positioning reference, installing an inner magnetic ring sheet clamp body on a positioning base surface of the station rotating disc, fixing and locking;

s8, mounting the semi-finished product of the inner magnetic ring piece, and adjusting the clearance between the end face and the side face of the semi-finished product of the inner magnetic ring piece and the positioning surface of the clamp body;

step S9, adjusting and calibrating the cutting molybdenum wire to enable the cutting molybdenum wire to lightly touch sparks on two side faces of the inner magnetic ring piece, recording coordinate values of the machine tool twice, and centering the two coordinate values;

step S10, the numerical control rotary table rotates, the relative position of the molybdenum wire and the workpiece is adjusted, the molybdenum wire is positioned at the median value, the station rotary table is arranged to rotate, and the molybdenum wire cuts the inner magnetic ring sheet along the circular arc path in the rotating process;

step S11, controlling the main frame to enable the molybdenum wire and the workpiece to move relatively, and cutting the molybdenum wire to cut the workpiece in a straight path;

step S12, the station rotating disc is set again to rotate reversely, and in the rotating process, the molybdenum wire cuts the inner magnetic ring piece along the circular arc path;

step S13, controlling the main frame to enable the molybdenum wire and the workpiece to move relatively, and cutting the molybdenum wire to cut the inner magnetic ring piece in a straight line path;

step S14, finishing the finished product cutting of the inner magnetic ring sheet;

s15, enabling the positioning base surface of the station rotating disc to be in a horizontal position, taking the first side reference as a positioning reference, installing the outer magnetic ring clip on the positioning base surface of the station rotating disc, and locking a fixing screw;

s16, mounting the semi-finished product of the outer magnetic ring piece, and adjusting the gaps between the end face and the side face of the semi-finished product of the outer magnetic ring piece and the positioning surface of the clamp body respectively;

step S17, adjusting and calibrating the cutting molybdenum wire to enable the cutting molybdenum wire to lightly touch sparks on two side faces of the outer magnetic ring piece, recording coordinate values of the machine tool twice, and centering the two coordinate values;

s18, rotating the numerical control rotary table, adjusting the relative position of the molybdenum wire and the workpiece to enable the molybdenum wire to be positioned at the median value, and setting the station rotary table to rotate so that the molybdenum wire cuts the outer magnetic ring piece along the circular arc path in the rotating process;

step S19, controlling the main frame to enable the molybdenum wire and the workpiece to move relatively, and cutting the molybdenum wire to cut the workpiece in a straight path;

step S20, setting the station rotating disc to rotate reversely, and cutting the outer magnetic ring piece along the circular arc path by the molybdenum wire in the rotating process;

step S21, controlling the main frame to enable the molybdenum wire and the workpiece to move relatively, and cutting the molybdenum wire to cut the outer magnetic ring piece in a straight path;

and step S22, finishing the finished product cutting of the outer magnetic ring piece.

Compared with the prior art, the invention has the following technical effects:

(1) the wire cut electrical discharge machining process is adopted, the brittleness and hardness of the material are met, and high utilization rate and high efficiency of the material can be obtained;

(2) the reasonable arrangement of the process method and the working procedures solves the blank problem, shortens the primary processing time, ensures the shape and size, the curved surface thickness and the surface quality of a single piece, and ensures the qualification rate of parts to be more than 95 percent;

(3) the part clamping is convenient, the operation is simple and convenient, the time and the labor are saved, the labor intensity is reduced, and the yield is high;

(4) the method is not only limited to the processing of bowl-shaped magnetic materials, but also suitable for the processing of other metal parts with complex curved surfaces, and has strong practicability and wide application range.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic perspective view of a wire-cut electric discharge machine for a magnetic steel sheet with a complex curved surface according to the present invention;

FIG. 2 is an exploded perspective view of the wire-cut electric discharge machine for magnetic steel sheet with complex curved surface shown in FIG. 1;

FIG. 3 is an enlarged detail view of area A in FIG. 2;

FIG. 4 is a schematic diagram of a further perspective structure of the complex curved magnetic steel sheet wire-cut electric discharge machine in FIG. 2;

FIG. 5 is an exploded perspective view of the wire-cut electric discharge machine for magnetic steel sheet with complex curved surface shown in FIG. 4;

FIG. 6 is an enlarged detail view of the area B in FIG. 5;

FIG. 7 is a perspective view of the conductive assembly of FIG. 5;

FIG. 8 is an exploded perspective view of the conductive assembly of FIG. 7;

FIG. 9 is a schematic perspective view of the workpiece holder of FIG. 5;

FIG. 10 is an exploded perspective view of the workpiece holder of FIG. 9;

FIG. 11 is a schematic view of the use of the work holder of FIG. 9 with the auxiliary holder installed;

FIG. 12 is a schematic view of the use of the work holder of FIG. 9, in an exploded mode;

FIG. 13 is an exploded perspective view of the auxiliary clamp of FIG. 11;

FIG. 14 is a schematic view of the use of the work holder of FIG. 9 with a blank clamped;

FIG. 15 is an exploded perspective view of the auxiliary clamp of FIG. 11;

FIG. 16 is a schematic view of the use of the work holder of FIG. 9 with a work piece of another configuration being held;

FIG. 17 is a schematic view of the use of the work holder of FIG. 16, in an exploded mode;

FIG. 18 is a schematic diagram of the wire-cut electric discharge machine for a complex curved magnetic steel sheet according to the present invention;

FIG. 19 is a schematic view of the complex curved surface magnetic steel sheet wire cut electric discharge machine of FIG. 16, showing another view;

FIG. 20 is a schematic view of the wire-cut electric discharge machine for a complex curved magnetic steel sheet according to the present invention, showing another view;

FIG. 21 is a schematic diagram of the use of the conductive assembly of the complex curved magnetic steel sheet wire cut electric discharge machine of the present invention;

FIG. 22 is an assembled view of the workpiece of FIG. 11;

FIG. 23 is a side reference schematic of a work holder of the present invention;

fig. 24 is a schematic view of an assembled structure of an inner magnetic ring and an outer magnetic ring of a conventional magnetic rotor;

FIG. 25 is a schematic diagram of the path of the cutting apparatus of the present invention during molybdenum wire processing, showing path 1, path 2, path 3 and path 4;

FIG. 26 is a schematic diagram of the path of the cutting device of the present invention during molybdenum wire machining, showing path Q.

In the figure: 1-a magnetic steel sheet wire cut electrical discharge machining device with a complex curved surface; 2-a machine tool workbench; 3-a turntable mounting base; 30-mounting an inclined plane; 31-mounting a fixture block; 32-installing a block hole; 33-a fixture block screw; 4-numerical control turntable; 41-a turntable body; 42-turntable bar; 421-a first turntable horizontal bar threaded hole; 43-turret longitudinal bars; 431-a first turret longitudinal bore; 432-second turret longitudinal holes; 44-a second screw; 45-a first screw; 5-a conductive component; 51-brush-holder mount; 511-fixing seat center hole; 512-mounting ring; 513-conductive pillars; 52-an insulating rod; 521-insulating rod hole; 53-a jaw; 531-fixing the arm loop; 532-electric brush; 54-brush spring; 6-station rotating disc; 7-a workpiece holder; 71-positioning a base surface; 711-first beveled threaded hole; 712-a second beveled threaded hole; 713-positioning the fiducial notches; 72-workpiece positioning bar; 721-positioning bar holes; 8-an insulating pad; 9-auxiliary clamp; 91-clamp master block; 911-third main block locking hole; 912-a first main block round hole; 913 — a second main block locking hole; 914-positioning reference; 92-a positioning block; 921-clamp positioning holes; 93-briquetting; 931-briquetting holes; 94-pressing strips; 941-fixing hole; 942-locking hole of batten; 95-third screw; 96-compression screws; 97-fourth screw; 98-fifth screw; 10-a workpiece; 101-a blank; 102-a front reference block; l1-first side reference; l2 — second side reference; k0-main machine tool; k2-machine tool taper device; k3-wire storage cylinder; k4-machine tool lower line frame; k5-machine tool line-feeding rack; n-inner magnetic ring sheet; w-outer magnetic ring piece;

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

As shown in fig. 1 to 10, the complicated curved magnetic steel sheet wire cut electrical discharge machining apparatus 1 includes a machine tool table 2, a detachable turntable mounting base 3 is provided on the machine tool table 2, the turntable mounting base 3 is a triangular prism structure, the turntable mounting base 3 includes a mounting inclined plane 30, four corners of the mounting inclined plane 30 are respectively provided with a mounting fixture block 31, the mounting fixture block 31 is respectively provided with a mounting fixture block hole 32, a fixture block screw 33 is provided in the mounting fixture block hole 32, and the numerical control turntable 2 is fixed on the mounting fixture block 31 through the fixture block screw 33.

As shown in fig. 5 and 6, a detachable numerical control turntable 4 is provided on the turntable mounting base 3, the numerical control turntable 4 is commercially available, a turntable main body 41 is provided on a front end surface of the numerical control turntable 4, the numerical control turntable 4 can drive the turntable main body 41 to rotate, a turntable cross bar 42 and a pair of turntable longitudinal bars 43 are provided on a lower side edge of the numerical control turntable 4, the turntable longitudinal bars 43 are arranged in a direction perpendicular to the turntable cross bar 42, a pair of first turntable cross bar threaded holes 421 are respectively provided at both ends of the turntable cross bar 42, a first turntable longitudinal bar hole 431 is provided at an upper portion of the turntable longitudinal bar 43, a pair of second turntable longitudinal bar holes 432 are provided at a lower portion of the turntable longitudinal bar 43, the first turntable cross bar threaded holes 421 and the second turntable longitudinal bar holes 432 are connected by a plurality of first screws 45, a second screw 44 is provided in the first turntable longitudinal bar hole 431, the first turntable longitudinal bar hole 431 is fixed to the numerical control turntable 4 by the second screw 44.

As shown in fig. 7 and 8, a conducting assembly 5 is respectively disposed on the turntable longitudinal bar 43, the conducting assembly 5 includes a brush holder fixing seat 51, an insulating rod 52, a pair of claws 53 and a brush spring 54, the center of the brush holder fixing seat 51 is provided with a fixing seat central hole 511, the edge of the brush holder fixing seat 51 is provided with a detachable conducting post 513 for connecting with a power supply, both sides of the brush holder fixing seat 51 are respectively provided with a mounting ring 512, the tail of the claw 53 is respectively provided with a pair of fixing arm rings 531, the fixing arm rings 531 are connected with the mounting ring 512 through screws, the head of the brush holder fixing seat 51 is provided with a brush 532, the brush 532 is used for conducting electricity, the brushes 532 at both sides are clamped on both sides of the rotating disk at a station, the insulating rod 52 is disposed in the fixing seat central hole 511, the bottom of the insulating rod 52 is provided with an insulating rod hole 521, the second screw 44 penetrates the insulating rod hole 521, and the brush spring 54 is detachably fixed between the pair of claws 53. When the wire cutting device is used, current passes through the conductive column 513, the brush support fixing seat 51, the jaw 53, the brush 532, the station rotating disc 6 and the workpiece clamp 7 in sequence, is finally transmitted to a test piece, and forms an electrode different from the wire storage cylinder K3 on the test piece, so that the test piece is subjected to wire cutting.

As shown in fig. 9 and 10, a detachable station rotating disk 6 is provided on the turntable main body 41. The station rotating disk 6 is matched with the electric brushes 532, wherein the volume of the electric brushes 532 is continuously reduced along with the long-term use of the electric brushes 532, and the electric brushes 532 on the two sides are always firmly clamped on the two sides of the station rotating disk 6 under the action of the pulling force of the electric brush springs 54, so that the electric conduction effect is realized. When the brush 532 becomes unusable, it is replaced directly.

An insulating pad 8 is arranged between the station rotating disk 6 and the turntable main body 41, and the insulating pad 8 is connected with the turntable main body 41 through a screw.

The work station rotating disc 6 is provided with a detachable work fixture 7, the work fixture 7 comprises a positioning base 71 and a work positioning strip 72, a pair of first inclined plane threaded holes 711 are respectively arranged on two sides of the positioning base 71, a pair of second inclined plane threaded holes 712 and a through positioning reference notch 713 are arranged on the positioning base 71, a positioning strip hole 721 is respectively arranged on two ends of the work positioning strip 72, and the positioning strip hole 721 is connected with the first inclined plane threaded holes 711 through screws.

A detachable auxiliary clamp 9 is disposed on the work clamp 7, the auxiliary clamp 9 includes a clamp main block 91, a clamp positioning block 92 is disposed on one side of the clamp main block 91, a plurality of pressing blocks 93 are disposed on the other side of the clamp main block 91, a pressing strip 94 is disposed above the clamp main block 91, a pair of first main block circular holes 912 and a pair of second main block locking holes 913 are disposed on the upper end surface of the clamp main block 91, a pair of third main block locking holes 911 are disposed on both side walls of the clamp main block 91, a pair of clamp positioning holes 921 are disposed on the clamp positioning block 92, a pressing block hole 931 is disposed on the pressing block 93, a pair of pressing strip fixing holes 941 and a pressing strip locking hole 942 are disposed on the pressing strip 94, a pair of third screws 95 penetrates through the pressing strip fixing holes 941 and is locked in the second main block locking holes 913, a pressing screw 96 penetrates through the pressing strip locking holes 942, a pair of fourth screws 97 penetrates through the clamp positioning holes 921 and is locked in the third main locking holes 911, a pair of fifth screws 98 pass through the pressing block hole 931 and are locked in the third main block locking hole 911, and a positioning reference 914 is disposed at the bottom of the clamp main block 91, and the positioning reference 914 is matched with the positioning reference notch 713.

The workpiece positioning bar 72 and the jig positioning block 92 constitute a first side reference L1 and a second side reference L2, respectively.

As shown in fig. 18 to 19, a specific application of the complicated curved surface magnetic steel sheet wire electric discharge machine of the present invention is shown. The complex curved surface magnetic steel sheet wire cut electric discharge machine 1 is installed on a main machine tool K0, and a wire storage cylinder K3 and a machine tool lower wire rack K4 are further arranged on a main machine tool K0. A machine tool cone device K2 is arranged on the machine tool wire feeding rack K5.

The following explains the working process of the complicated curved surface magnetic steel sheet wire electric discharge machining device 1, including the steps of:

step S1, installing the cut magnetic ring or workpiece 10 and the auxiliary clamp 9 on the positioning base surface 71 of the station rotating disc 6;

step S2, rotating the numerical control rotary table 4 to enable the positioning surface of the station rotary disc 6 to be in a horizontal position, and performing perpendicularity correction on the molybdenum wire K31 by respectively referring to the positioning base surface 71, the first side datum L1 and the second side datum L2 of the station rotary disc 6 through the machine tool taper device K2;

step S3, the input power is respectively connected to the conductive pillars 513 on both sides, the coordinates are moved to the cutting start position, and the discharge cutting is performed according to the automatic control program. In the cutting process, the station rotating disc 6 drives the workpiece 10 to make rotary motion, and the XYUV shaft of the machine tool makes horizontal displacement motion, so that five-shaft linkage control is realized, and the cutting processing of the complex curved surface of the magnetic ring is completed;

and step S4, when the cutting program is finished, the system automatically alarms and suspends, at the moment, the auxiliary clamp can be kept unchanged, and only the next workpiece needs to be replaced.

When the brush is worn with use, the front end of the jaw 53 is automatically tightened by the brush spring 54, and is closely attached to the contact until the brush is worn to the root of the brush, and then the brush is replaced.

The mounting of the workpiece 10 will be further described below.

As shown in fig. 11 to 13, first, the jig positioning block 92, the pressing block 93, and the pressing bar 94 are all connected to the jig main block 91 in advance, wherein the pressing screw 96 and the fifth screw 98 are in a loose state. Then, the tile workpiece 10 is placed on the positioning base 71, the bottom is based on the positioning base 71, the side is positioned by the inner side of the clamp positioning block 92, the end is positioned by the side of the clamp main block 91, then the fifth screw 98 is locked, and finally the compression screw 96 is locked.

As shown in fig. 14 and 15, the auxiliary clamp 9 can also be used to fix a block-shaped blank 101, the clamping principle is similar to that of the workpiece 10 in fig. 11 to 13, and the description is not repeated. It should be noted that a front reference block 102 is provided in front of the positioning base 71 for calibration of the blank 101.

As shown in fig. 16 and 17, the auxiliary clamp 9 is also used to fix a workpiece 10A of another curvature, and unlike the workpiece 10B in fig. 11 and 12, the workpiece 10A has a different curvature. At this time, the number of the compacts 93 is one. For example, as shown in fig. 24, the inner magnetic ring piece N may be held by the jig of fig. 16 and 17, and the outer magnetic ring piece W may be held by the jig of fig. 11 and 12.

As shown in fig. 24 to 26, a specific application of the complicated curved surface magnetic steel sheet wire electric discharge machining apparatus will be described below, including the steps of:

step S1, clamping the blank 101 on a workpiece fixture, and rotating the numerical control rotary table 4 to enable the positioning base surface of the station rotary table 6 to be in a horizontal position;

step S2, firstly, tightly attaching the blank 101 to the end faces of the front reference block 102 and the first side reference L1, locking bolts, and then removing the front reference block 102;

step S3, adjusting and cutting the molybdenum wire by using the end face of the first side reference L1 to ensure consistent sparks of the molybdenum wire, moving the Y axis to enable the molybdenum wire to move to a position 28.2mm away from the end face of the side reference, moving the X axis to enable the molybdenum wire to slightly touch sparks on two side faces of the blank 101, recording coordinate values of the machine tool in the two times, and centering the two coordinate values;

s4, rotating the numerical control rotary table 4 by 45 degrees, moving the X axis to enable the molybdenum wire to be positioned at the median value, setting the station rotary table 6 to rotate by 105 degrees, enabling the molybdenum wire to be cut along the path 1 in the rotating process, reducing the distance between the cut molybdenum wire and the end face of the first side reference L1 by 10.2mm after the molybdenum wire is cut for the first time, setting the station rotary table 6 to rotate reversely by 120 degrees again, enabling the molybdenum wire to be cut for the second time in the path 2 of the molybdenum wire in the rotating process, and finishing the primary processing of the outer magnetic ring piece W;

step S5, reducing the distance between the molybdenum wire and the end face of the first side reference L1 by 0.3mm, setting the station rotating disc 6 to rotate in the reverse direction for 150 degrees, so that the molybdenum wire cuts the workpiece for the third time along the path 3 in the rotating process, reducing the distance between the molybdenum wire and the end face of the first side reference L1 by 10.2mm after the third time of cutting, setting the station rotating disc 6 to rotate in the reverse direction for 180 degrees again, so that the molybdenum wire cuts the workpiece for the fourth time along the path 4 in the rotating process, and finishing the primary processing of the inner magnetic ring piece N after the fourth time of cutting;

step S6, placing the cut outer magnetic ring pieces W and the cut inner magnetic ring pieces N in groups;

step S7, enabling the positioning base surface of the station rotating disk 6 to be in a horizontal position, taking the first side reference L1 as a positioning reference, installing the inner magnetic ring piece N clamp on the positioning base surface of the station rotating disk 6, and locking a fixing screw;

step S8, taking the second side reference of the inner magnetic ring piece N processed in the step S7 as a positioning reference, clamping the inner magnetic ring piece N, and locking a lateral screw to enable a lateral pressure block to clamp the outer magnetic ring piece W, wherein the gap between the end face of the side face of the inner magnetic ring piece N and the positioning surface of the clamp body is not more than 0.03mm during clamping;

step S9, adjusting and cutting the molybdenum wire by using the end face of the first side reference L1 to ensure consistent sparks of the molybdenum wire, moving the Y axis to ensure that the distance between the molybdenum wire and the end face of the side reference is 28.2mm, moving the X axis to ensure that the molybdenum wire is slightly touched with sparks on two side faces of the inner magnetic ring piece N, recording the coordinate values of the machine tool in the two times, and centering on the two coordinate values;

step S10, rotating the numerical control rotary table 4 for 35 degrees, moving the X axis to enable the molybdenum wire to be positioned at the median value, and setting the station rotary table 6 to rotate for 57.5 degrees, so that the molybdenum wire cuts the inner magnetic ring piece N along the circular arc path Q in the rotating process;

step S11, moving the Y axis by 26.2mm, and cutting the molybdenum wire to cut the workpiece in a straight path;

step S12, the station rotating disc 6 is set again to rotate for 45 degrees in the reverse direction, and in the rotating process, the molybdenum wire cuts the inner magnetic ring piece N along the arc path Q;

s13, moving the Y axis in the reverse direction for 26.2mm, and cutting the molybdenum wire to cut the inner magnetic ring piece N in a straight path;

step S14, finishing the finished product cutting of the inner magnetic ring piece N;

step 15, enabling the positioning base surface of the station rotating disc 6 to be in a horizontal position, taking the first side reference L1 as a positioning reference, installing the outer magnetic ring piece W clamp on the positioning base surface of the station rotating disc 6, and locking a fixing screw;

step 16, taking the second side reference of the processed outer magnetic ring piece W in the step S7 as a positioning reference, clamping the outer magnetic ring piece W, and locking a lateral screw, so that a lateral pressure block clamps the outer magnetic ring piece W, and the gap between the side surface of the outer magnetic ring piece W and the positioning surface of the clamp body is not more than 0.03mm during clamping;

step 17, adjusting and adjusting the cut molybdenum wire by using the end face of the first side reference L1 to ensure consistent sparks of the cut molybdenum wire, moving the Y axis to enable the distance between the cut molybdenum wire and the end face of the side reference to be 28.2mm, moving the X axis to enable the cut molybdenum wire and two side faces of the outer magnetic ring piece W to slightly touch sparks, recording the coordinate values of the machine tool in the two times, and centering the two coordinate values;

step S18, rotating the numerical control rotary table 4 by 28 degrees, moving the X axis to enable the molybdenum wire to be positioned at the median value, and setting the station rotary table 6 to rotate by 50.5 degrees, so that the molybdenum wire cuts the outer magnetic ring piece W along the circular arc path Q in the rotating process;

step S19, moving the Y axis by 26.2mm, and cutting the molybdenum wire to cut the workpiece in a straight path;

step S20, the station rotating disc 6 is set again to rotate in the reverse direction for 45 degrees, and in the rotating process, the molybdenum wire cuts the outer magnetic ring piece W along the arc path Q;

s21, moving the Y axis in the reverse direction for 26.2mm, and cutting the molybdenum wire into the outer magnetic ring piece W in a straight path;

and step S22, finishing the finished product cutting of the outer magnetic ring piece W.

The electric spark wire-electrode cutting method of the bowl-shaped magnetic ring piece has the following advantages:

The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.

Claims

1. The utility model provides a complicated curved surface magnetic steel piece spark-erosion wire cutting device which characterized in that includes:

2. The complex curved surface magnetic steel sheet wire cut electric discharge machine according to claim 1, characterized in that: the positioning base surface is an inclined surface, and the workpiece positioning strip can be detachably fixed on the side wall of the positioning base surface.

3. The complex curved surface magnetic steel sheet wire cut electric discharge machine according to claim 1, characterized in that: the fixture comprises a fixture main body, wherein a plurality of pressing blocks can be detachably connected to the front of the fixture main body, a fixture positioning block can be detachably connected to the back of the fixture main body, a pressing strip can be detachably connected to the upper surface of the fixture main body, a positioning datum is arranged on the lower surface of the fixture main body, the positioning datum is a strip-shaped protrusion, a positioning datum groove opening is formed in the positioning datum, and the positioning datum can be located in the positioning datum groove opening.

4. The complex curved surface magnetic steel sheet wire cut electric discharge machine according to claim 1, characterized in that: the side wall of the numerical control rotary table can be detachably connected with a rotary table transverse bar, two ends of the rotary table transverse bar can be detachably connected with a rotary table longitudinal bar respectively, and each rotary table longitudinal bar can be detachably connected with a conductive assembly.

5. The complex curved surface magnetic steel sheet wire cut electric discharge machine according to claim 4, characterized in that: the conductive assembly comprises an electric brush support fixing seat, two ends of the electric brush support fixing seat are respectively connected with a jaw in a rotating mode, each jaw is provided with an electric brush and two electric brush springs, the electric brush support fixing seat is provided with a fixing seat center hole, an insulating rod can be detachably connected in the fixing seat center hole, and a conductive column can be detachably connected to one end of the electric brush support fixing seat.

6. The complex curved surface magnetic steel sheet wire cut electric discharge machine according to claim 1, characterized in that: the workpiece fixture is fixed on the first surface of the station rotating disc, and the second surface of the station rotating disc is fixed on the rotary table main body.

7. The complex curved surface magnetic steel sheet wire cut electric discharge machine according to claim 1, characterized in that: the numerical control rotary table can be detachably connected to the rotary table mounting seat, the rotary table mounting seat is provided with a mounting inclined plane, a plurality of mounting fixture blocks are fixed on the mounting inclined plane, and the numerical control rotary table can be detachably connected to the mounting fixture blocks.

8. The complex curved surface magnetic steel sheet wire electric discharge machining device according to claim 7, characterized in that: the rotary table mounting seat can be detachably fixed on a machine tool workbench.

9. A cutter frame, characterized by: the complex curved surface magnetic steel sheet wire cut electric discharge machine according to any one of claims 1 to 8, which is fixed on a host machine bed, wherein the host machine bed is provided with a wire storage cylinder, a machine bed upper wire frame and a machine bed lower wire frame, and a machine bed cone structure is arranged on the machine bed upper wire frame.

10. A cutting method based on the cutter frame of claim 9, characterized by comprising the following steps: