CN100584499C - Processing and fabricating method of bend type cavity with changeable section - Google Patents
Processing and fabricating method of bend type cavity with changeable section Download PDFInfo
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- CN100584499C CN100584499C CN200810049233A CN200810049233A CN100584499C CN 100584499 C CN100584499 C CN 100584499C CN 200810049233 A CN200810049233 A CN 200810049233A CN 200810049233 A CN200810049233 A CN 200810049233A CN 100584499 C CN100584499 C CN 100584499C
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Abstract
The invention discloses a process manufacture method of a variable section bend cavity. At first, the cavity is roughly milled; through holes are drilled at the two ends of the opening of a bend body; the milling process is achieved from the two ends along the drilling direction; 3-5mm of the process redundancy is preserved by an electric spark at the position which can be processed; after that, the process forming is achieved by the electric spark; a hollow electrode with the same shape of the bend cavity is designed and manufactured; the electrodes have three types: a rough electrode, a half precise electrode and a precise electrode; the process forming is achieved by the rough electrode electric spark at first, the half precise electrode electric spark is then used for process forming and the precise forming is finally achieved by the precise electrode electric spark; by adopting the processing and manufacture method of the invention, the processing precision is high and the efficiency is high.
Description
Technical field
The invention belongs to the manufacturing technology technical field, specially refer to a kind of machining manufacture of variable cross-section bend die cavity.
Background technology
At present, the processing of the variable cross-section bend die cavity of having relatively high expectations for mechanical performance, the external normal hot investment casting moulding of adopting, domestic precision casting technology is not perfect, the conventional processing method of general employing, the method that promptly adopts the manual machine-shaping of Milling Process and pincers worker to combine is processed, and this processing technology profile error is big, process-cycle is very long, and working (machining) efficiency is low.
The edm forming manufacturing technology belongs to extraordinary manufacturing technology, and processing mode generally adopts unidirectional straight-line feed.The domestic axle that generally is used for swivel feeding, supporting power is very little, generally is not more than 10 kilograms.Often adopt the small electrode segmental machining for big die cavity, but segmental machining needs repeatedly tool setting, dislocation easily is difficult to guarantee machining accuracy that working (machining) efficiency is also very low.
Summary of the invention
Because there is above-mentioned processing problems in large-scale variable cross-section bend body, the purpose of this invention is to provide a kind of machining manufacture of variable cross-section bend die cavity.
For achieving the above object, the present invention has adopted following technical scheme:
The machining manufacture of described variable cross-section bend die cavity, its procedure of processing is: roughing milling die cavity at first, re-use the moulding of thick electrode spark machined, use half smart electrode spark machined moulding then, finally adopt smart electrode electric spark refine moulding; Wherein,
I, roughing milling die cavity: from the two ends boring earlier of bend body opening, and drill through, carry out Milling Process respectively from two ends along the direction of boring, the position that can be worked into is the allowance that spark machined is stayed 3～5mm;
II, spark machined moulding:
(1), the design of electrode, manufacturing
A), the design of electrode, processing: electrode divides three kinds at thick electrode, half smart electrode, smart electrode, workpiece carries out electrical spark working man-hour, require different according to work fineness, available thick electrode, half smart electrode, three kinds of electrodes of smart electrode are processed successively, also can only process successively with thick electrode, two kinds of electrodes of smart electrode; The processing of each electrode all is to adopt the splicing of polylith graphite blank piece, before the every blank piece splicing, inside is hollowed out, and remains with the zone of screw hole, and the two ends of blank piece are met personally flat; Along the bonding respectively adjacent blank piece that has hollowed out of order, reinforce with screw again, successively the blank piece is stitched together; The reprocessing profile processes and the identical hollow electrode of above-mentioned curved road type cavity shape;
B), the dimensional measurement of electrode: following three kinds of methods are arranged:
1. adopt the shape and the size of model measurement electrode;
2. adopt three-coordinates measuring machine to measure;
3. the position data of partial cross-section measurement different cross section point on CNC milling machine is measured 4 sectional positions at least;
C), electrode installs and measures: at the big openend of bend body, process a gauge orifice in advance, less than and near final size, thick electrode, half smart electrode and smart electrode are benchmark tool setting centering with this hole all adding man-hour, whether detecting electrode is installed and is twisted;
D), tool setting centering: adopt the tool setting device tool setting, with the position of detection and correcting electrode, promptly whether the centre of gyration overlaps with the centre of gyration of bend body;
(2), bend die cavity processing
On the workbench of CNC electrical discharge machine, is benchmark centering, levelling workpiece by bottom surface that has processed and side with the bend body clamping after the milling roughing; Electrode is installed on the electrode installing plate that is connected with the electrode rotating shaft; By tool setting centering electrode, the pivot of electrode rotating shaft is overlapped with the centre of gyration of workpiece bend body, promptly determine the dead-center position of X-axis, Y-axis, Z axle; Connect power supply, under the control of digital control system, make the gyroaxis rotation according to predefined numerical control program, pass through travelling gear, pass to the electrode rotating shaft rotatablely moving, the electrode rotating shaft drives the rotation of electrode installing plate, makes electrode be rotated processing around the electrode rotating shaft; Electrode adds man-hour, adopt the process principle of discharge, outage to process, use the machined electrode to process earlier, surplus is 0.3mm at least, discharge current 150～180 peaces, use the semifinishing electrode to process after the roughing, surplus is 0.1mm at least, discharge current 10～50 peaces, use the fine finishining electrode to carry out refine at last, surplus is zero, discharge current 8～10 peaces, and variable cross-section bend die cavity machines.
The machining tool of described variable cross-section bend die cavity, based on existing three-axis numerical control electric spark machine tool, it is made up of lathe main frame, power supply, digital control system and working liquid container, the lathe main frame is made up of lathe bed, ram X, Y-axis moving component and Z spindle unit, workbench and oil groove are set on the lathe bed, ram X, Y-axis moving component all place the lathe bed rear side, X, Y-axis adopt the rolling linear guide supporting, by the driven by servomotor ball screw, main shaft is installed on the Z spindle unit, the Z spindle unit is supported by rolling linear guide, passes through driven by servomotor; It also has the single-revolution axle, and gyroaxis is fixed on the connecting plate, and connecting plate is connected with main shaft, and gyroaxis is connected with the electrode rotating shaft by travelling gear, and the electrode rotating shaft is fixed on below the connecting plate, and gyroaxis is by driven by servomotor; Electrode is installed on the electrode installing plate, and balancing weight also is installed on the electrode installing plate, and the electrode installing plate is connected with the electrode rotating shaft.
The machining tool of described variable cross-section bend die cavity, its gyroaxis also can directly be connected with main shaft.
Owing to adopted technical scheme as mentioned above, the present invention has following superiority:
Processing to variable cross-section bend die cavity, all adopt the electrical spark working man-haur efficiency very low, also be unfavorable for chip removal, the machining manufacture of variable cross-section bend die cavity of the present invention, bend die cavity subregion is processed, adopt numerical control to mill in advance earlier the roughing of die cavity position is finished, the position that can be worked into is the allowance that spark machined is stayed 3～5mm; Adopt spark machined with the machine-shaping of variable cross-section bend die cavity again.
Electrical spark working man-hour, adopt the linear axis location, the gyroaxis feeding makes processing technology reasonable, the machining accuracy height; Electrode adopts the splicing of graphite blank piece, and adopts the technology of screw and bonding and usefulness, designs the hollow electrode of special shape, both can reduce electrode weight, can satisfy shape requirement again; Three kinds of electrode processing both can improve working (machining) efficiency, guaranteed machining accuracy again easily.
Gyroaxis adopts accurate digital control rotary table, AC servo machinery driving, obtaining accurate calibration, and can realize continuous adjustable speed rotation, crawl adjustment and servo processing, gyroaxis maximum capacity: 60Kg.
Description of drawings
Fig. 1 is the schematic diagram of processing bend die cavity;
Fig. 2 is the sectional view of Fig. 1;
Fig. 3 is the assembly unit schematic diagram of electrode;
Fig. 4 is the vertical view of a blank piece among Fig. 3;
Fig. 5 is the structural representation of the machining tool of variable cross-section bend die cavity;
Among the figure: the 1-main shaft; The 2-electrode; 3-electrode installing plate; The 4-balancing weight; The 5-connecting plate; 6-electrode rotating shaft; The 7-gyroaxis; The 8-travelling gear; 9-blank piece.
The specific embodiment
Below in conjunction with embodiment the present invention is described in further detail:
As shown in Figure 1, 2, workpiece has the bend shape, and die cavity is dark, variable cross-section, and the material hardness height, roughness requires high.
As shown in Figure 5, the machining tool of this variable cross-section bend die cavity, based on existing three-axis numerical control electric spark machine tool, it is by the lathe main frame, power supply, digital control system and working liquid container are formed, the lathe main frame is by lathe bed, ram X, Y-axis moving component and Z spindle unit are formed, machine adopted ox head C type version, control by digital control system, supporting member as lathe, lathe bed adopts box structure, can obtain high supporting rigidity, and workbench and oil groove are set on the lathe bed, ram X, the Y-axis moving component all places the lathe bed rear side, help improving the motion rigidity and the geometric accuracy of parts, X, Y-axis adopts the rolling linear guide supporting, by the driven by servomotor ball screw, realize X respectively by digital control system control, Y-axis adjustment campaign is to obtain the adjustment of accurate position; Main shaft is installed on the Z spindle unit, and the Z spindle unit is supported by rolling linear guide, by driven by servomotor, drives main shaft and adjusts motion up and down, by numerical control/manually control is adjusted, realizes accurately location; It also has single-revolution axle 7, and gyroaxis is fixed on the connecting plate 5, and connecting plate is connected with main shaft 1, and gyroaxis 7 is connected with electrode rotating shaft 6 by travelling gear 8, and electrode rotating shaft 6 is fixed on below the connecting plate 5, and gyroaxis is by driven by servomotor; Electrode 2 is installed on the electrode installing plate 3, and balancing weight 4 also is installed on the electrode installing plate, and electrode installing plate 3 is connected with electrode rotating shaft 6.
The machining tool of described variable cross-section bend die cavity, its gyroaxis also can directly be connected with main shaft.
The machining manufacture of this variable cross-section bend die cavity, its procedure of processing is:
1, processing profile and datum level and leave 10～15mm surplus;
2,, and drill through respectively from big end, the small end prebored hole of bend body opening;
3, the small end straight hole zone elongated hole of processing bend body opening is to the figure paper size;
4, adopt numerical control to mill roughing bend die cavity position, the even allowance 3～5mm in the position that can be worked into;
5, spark machined
(1), the design of electrode, manufacturing
A), the design of electrode, processing: electrode divides three kinds at thick electrode, half smart electrode, smart electrode, workpiece carries out electrical spark working man-hour, according to the requirement of workpiece fineness, adopt thick electrode, half smart electrode, three kinds of electrodes of smart electrode to process successively, also can only process successively with thick electrode, two kinds of electrodes of smart electrode; Shown in Fig. 3,4, the processing of each electrode all is to adopt the splicing of polylith graphite blank piece, before the every blank piece splicing, inside is hollowed out, and remains with the zone of screw hole, and the two ends of blank piece are met personally flat; Along the bonding respectively adjacent blank piece that has hollowed out of order, reinforce with screw again, successively the blank piece is stitched together; The reprocessing profile processes and the identical hollow electrode of above-mentioned curved road type cavity shape, processes three kinds at thick electrode, half smart electrode, smart electrode; Three kinds of electrode structures, shape are identical, the appearance and size difference, wherein thick electrode appearance and size is than the even little 0.8mm of actual figure paper size, and half smart electrode appearance and size is than the even little 0.3mm of actual figure paper size, and smart electrode appearance and size is than the even little 0.1mm of actual figure paper size;
B), the dimensional measurement of electrode: the position data of different cross section point is measured in the partial cross-section on CNC milling machine, and data can be obtained on computers in advance, measure 4 sectional positions at least;
C), electrode installs and measures: at the big openend of bend body, process a gauge orifice in advance, less than and near final size, thick electrode, half smart electrode and smart electrode are benchmark tool setting centering with this hole all adding man-hour, whether detecting electrode is installed and is twisted;
D), tool setting centering: adopt the tool setting device tool setting, with the position of detection and correcting electrode, promptly whether the centre of gyration overlaps with the centre of gyration of bend body;
(2), bend die cavity processing
On the workbench of CNC electrical discharge machine, is benchmark centering, levelling workpiece by bottom surface that has processed and side with the bend body clamping after the milling roughing; Electrode is installed on the electrode installing plate that is connected with the electrode rotating shaft; By tool setting centering electrode, the pivot of electrode rotating shaft is overlapped with the centre of gyration of workpiece bend body, promptly determine the dead-center position of X-axis, Y-axis, Z axle; Connect power supply, under the control of digital control system, make gyroaxis 7 rotations according to predefined numerical control program, by travelling gear 8, pass to electrode rotating shaft 6 rotatablely moving, the electrode rotating shaft drives 3 rotations of electrode installing plate, makes electrode 2 be rotated processing around electrode rotating shaft 6; Use the roughing electrode to process earlier, surplus is 0.3mm at least, and discharge current 150～180 peaces use the semifinishing electrode to process after the roughing, surplus is 0.1mm at least, discharge current 10～50 peaces use the fine finishining electrode to carry out refine at last, and surplus is zero, discharge current 8～10 peaces, electrical spark working man-hour,, control roughness with different discharge currents;
6, pincers worker polishing guarantees the requirement of smooth connection and roughness, and variable cross-section bend die cavity machines.
Claims (1)
1, a kind of machining manufacture of variable cross-section bend die cavity, it is characterized in that: its procedure of processing is: roughing milling die cavity at first, re-use the moulding of thick electrode spark machined, use half smart electrode spark machined moulding then, finally adopt smart electrode electric spark refine moulding; Wherein,
I, roughing milling die cavity: from the two ends boring earlier of bend body opening, and drill through, carry out Milling Process respectively from two ends along the direction of boring, the position that can be worked into is the allowance that spark machined is stayed 3～5mm;
II, spark machined moulding:
(1), the design of electrode, manufacturing
A), the design of electrode, processing: electrode divides three kinds at thick electrode, half smart electrode, smart electrode, workpiece carries out electrical spark working man-hour, require different according to workpiece fineness, available thick electrode, half smart electrode, three kinds of electrodes of smart electrode are processed successively, also can only process successively with thick electrode, two kinds of electrodes of smart electrode; The processing of each electrode all is to adopt the splicing of polylith graphite blank piece, before the every blank piece splicing, inside is hollowed out, and remains with the zone of screw hole, and the two ends of blank piece are met personally flat; Along the bonding respectively adjacent blank piece that has hollowed out of order, reinforce with screw again, successively the blank piece is stitched together; The reprocessing profile processes and the identical hollow electrode of above-mentioned curved road type cavity shape;
B), the dimensional measurement of electrode: following three kinds of methods are arranged:
1. adopt the shape and the size of model measurement electrode;
2. adopt three-coordinates measuring machine to measure;
3. the position data of partial cross-section measurement different cross section point on CNC milling machine is measured 4 sectional positions at least;
C), electrode installs and measures: at the big openend of bend body, process a gauge orifice in advance, less than and near final size, thick electrode, half smart electrode and smart electrode are benchmark tool setting centering with this hole all adding man-hour, whether detecting electrode is installed and is twisted;
D), tool setting centering: adopt the tool setting device tool setting, with the position of detection and correcting electrode, promptly whether the centre of gyration overlaps with the centre of gyration of bend body;
(2), bend die cavity processing
On the workbench of CNC electrical discharge machine, is benchmark centering, levelling workpiece by bottom surface that has processed and side with the bend body clamping after the milling roughing; Electrode is installed on the electrode installing plate that is connected with the electrode rotating shaft; By tool setting centering electrode, the pivot of electrode rotating shaft is overlapped with the centre of gyration of workpiece bend body, promptly determine the dead-center position of X-axis, Y-axis, Z axle; Connect power supply, under the control of digital control system, make the gyroaxis rotation according to predefined numerical control program, pass through travelling gear, pass to the electrode rotating shaft rotatablely moving, the electrode rotating shaft drives the rotation of electrode installing plate, makes electrode be rotated processing around the electrode rotating shaft; Electrode adds man-hour, adopt the process principle of discharge, outage to process, use the roughing electrode to process earlier, surplus is 0.3mm at least, discharge current 150～180 peaces, use the semifinishing electrode to process after the roughing, surplus is 0.1mm at least, discharge current 10～50 peaces, use the fine finishining electrode to carry out refine at last, surplus is zero, discharge current 8～10 peaces, and variable cross-section bend die cavity machines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810049233A CN100584499C (en) | 2008-02-04 | 2008-02-04 | Processing and fabricating method of bend type cavity with changeable section |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810049233A CN100584499C (en) | 2008-02-04 | 2008-02-04 | Processing and fabricating method of bend type cavity with changeable section |
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| CN100584499C true CN100584499C (en) | 2010-01-27 |
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| JP6008792B2 (en) * | 2013-05-16 | 2016-10-19 | 三菱重工業株式会社 | Electrochemical machining tool and electrolytic machining system |
| CN105436638A (en) * | 2016-01-26 | 2016-03-30 | 天津市中环三峰电子有限公司 | Processing technology method for mould cavity |
| CN106346092B (en) * | 2016-08-31 | 2019-11-22 | 四川航天烽火伺服控制技术有限公司 | A kind of processing method of shell blind hole bend |
| US20200122255A1 (en) * | 2017-02-08 | 2020-04-23 | General Electric Company | Electromachining systems and methods |
| JP6585676B2 (en) | 2017-10-05 | 2019-10-02 | ファナック株式会社 | Program generating apparatus and program generating method |
| CN108817579A (en) * | 2018-07-09 | 2018-11-16 | 南京航空航天大学 | A kind of meander electrode fixture that the curved hole machined of monocrystalline silicon electric spark may be implemented |
| CN109530826A (en) * | 2018-11-09 | 2019-03-29 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of method of electrical discharge machining aluminium alloy type chamber |
| CN109332825A (en) * | 2018-12-07 | 2019-02-15 | 中国航发南方工业有限公司 | Tool-electrode and the deep hole narrow groove processing method for using it |
| CN109848649B (en) * | 2019-01-28 | 2021-01-08 | 昆山明佰精密模塑有限公司 | Finish machining method for plastic mold |
| CN111843389B (en) * | 2020-07-24 | 2021-10-26 | 河南航天液压气动技术有限公司 | Centrifugal pump volute machining method |
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Owner name: HE'NAN KRONG TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: CUI GEJUN Effective date: 20120714 |
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Effective date of registration: 20120714 Address after: 471000 Henan city of Luoyang province Yanan Road 1 Fudi international center unit 2 building 1904 Patentee after: Henan province science and Technology Co., Ltd. Address before: 1 No. 5, No. 401, 14 Nanchang Road, Jianxi District, Henan, Luoyang, 471000 Patentee before: Cui Gejun |
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Granted publication date: 20100127 Termination date: 20180204 |