CN103042435A - High-frequency slight-amplitude vibration milling test method of splicing quenching hardening die steel - Google Patents
High-frequency slight-amplitude vibration milling test method of splicing quenching hardening die steel Download PDFInfo
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- CN103042435A CN103042435A CN2012104472017A CN201210447201A CN103042435A CN 103042435 A CN103042435 A CN 103042435A CN 2012104472017 A CN2012104472017 A CN 2012104472017A CN 201210447201 A CN201210447201 A CN 201210447201A CN 103042435 A CN103042435 A CN 103042435A
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Abstract
Disclosed is a high-frequency slight-amplitude vibration milling test method of splicing quenching hardening die steel. The method includes that a splicing quenching hardening steel workpiece is subjected to frequencies above 1000 Hz and amplitudes of 0.1 to 0.5 micron, and exciting forces above 200 N in the direction of feed of milling, and recording and analyzing the cutting forces and cutting vibration of the vibration milling splicing materials. The invention further provides a test device for achieving the high-frequency slight-amplitude vibration milling test method of splicing quenching hardening die steels is also provided. According to the high-frequency slight-amplitude vibration milling test method of splicing quenching hardening die steel, the microcosmic high-frequency intermittent impact milling effect can be obtained, the thermochemical effects resulting in rapid abrasion of tools can be reduced, the milling force can be reduced, the workability and the surface quality of the material can be improved, the service life of the tools can be prolonged, and the cutting force in the direction of feed during milling materials of different harnesses in the vibration milling process can be recorded and analyzed.
Description
Technical field
The present invention relates to a kind of splicing mould steel high frequency micro breadth oscillation milling method of testing of hardening, refer to especially a kind of can be in the vibration milling process record and the cutting force when analyzing milling different hardness spliced materials and the method for testing of cutting vibration situation.
Background technology
Have the labyrinths such as a large amount of grooves, corner, depression, projection on the free profile of the punch and matrix of large-scale auto body panels mould, these partial structurtes are prone to the problems such as serious wear, plucking drawing crack and mould can't be used in the punching course.For improving die life, satisfy the stressed different requirement of coin complex die cavity different parts, the complicated die die cavity uses the mould steel that hardens of different hardness to adopt the form manufacturing of splicing.
For integrality and the coverage forming quality that guarantees die face, need on same CNC lathe and with same, finish cutter, cutter life, requirement reached more than 4-12 hour.The different hardness hardened steel because its elastic modelling quantity is variant, the cutter relieving phenomenon occurs easily in the processing under the effect of Milling Force, cause the dimensional accuracy in different hardness district to be difficult to guarantee.
Adopt traditional Milling Process splicing mould steel, exist flutter intensity, smear metal to form stability, tool wear and material and remove the problems such as efficient and workpiece surface quality.
In the milling process under the equal conditions, the harden more single hardness hardened steel of milling vibration of mould steel of different hardness splicing is more violent, present positive correlation with workpiece hardness, at mould splicing regions place, because milling characteristic is complicated, the vibration of cutter and workpiece is excessive, violent milling vibration etc. causes tool wear speed to be accelerated even the appearance breakage, cause the surface quality of mould sharply to descend, and cause Mould Machining quality and yield rate low, seriously restricting the raising of large-scale auto body panels splicing die forming precision and efficient.Therefore, the present invention proposes a kind of testing arrangement, with Milling Force and the milling vibration state in the further investigation vibration milling process.
Summary of the invention
Excessive and affect the problem of workpiece surface quality in edge joint position vibration in order to solve common milling, the invention provides the splicing Hardened Steel Workpiece is applied frequency more than 1000Hz, amplitude 0.1 ~ 0.5 μ m, exciting force reaches more than the 200N, the auxiliary milling testing arrangement of electric liquid vibration of direction of feed cutting force situation when particularly recording and analyzing many hardness of milling spliced materials.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of splicing mould steel high frequency micro breadth oscillation milling method of testing of hardening, on the milling feed direction, the splicing Hardened Steel Workpiece is applied frequency more than 1000Hz, amplitude 0.1 ~ 0.5 μ m, exciting force reaches more than the 200N, cutting force, cutting vibration when record and analysis vibration milling spliced materials.
The beneficial effect of patent of the present invention is mainly manifested in: the vibration Milling Process is by applying workpiece more than the frequency 1000Hz, amplitude 0.1 ~ 0.5 μ m, exciting force reaches the above longitudinally high frequency micro breadth oscillation of 200N, can obtain the interrupted impact milling effect of high frequency on the microcosmic, can reduce to cause the heat chemistry effect of cutter rapid wearing, reduce Milling Force, improve machinability, surface quality and the cutter life of material, more traditional Milling Process has huge advantage.Direction of feed cutting force situation when in addition, the present invention can record and analyze milling different hardness material in milling process.
Description of drawings
Fig. 1 is the schematic diagram of apparatus of the present invention.
Fig. 2 is vibration milling attachment figure of the present invention.
Fig. 3 is vibration milling attachment top view of the present invention.
Fig. 4 is the cutaway view of workpiece, connecting plate base, dynamometer jockey.
The cutaway view of hydraulic cylinder occurs in Fig. 5 for vibration.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described further.
With reference to Fig. 1 ~ Fig. 5, a kind of splicing mould steel high frequency micro breadth oscillation milling method of testing of hardening, on the milling feed direction, the splicing Hardened Steel Workpiece is applied frequency more than 1000Hz, amplitude 0.1 ~ 0.5 μ m, exciting force reaches the above high frequency pumping of 200N, cutting force, cutting vibration when record and analysis vibration milling spliced materials.
Described method of testing adopts the testing arrangement of the auxiliary milling of a kind of many hardness spliced materials high frequency micro breadth oscillation, the structural design that combining with digital control machining center and high-frequency electrohydraulic generator carry out.With reference to Fig. 1-5, this milling attachment comprises high-speed numeric control Milling Machining Center and high-frequency electrohydraulic vibration machine, described high-speed numeric control Milling Machining Center comprises frame 1, main shaft 2 and milling cutter 3, described main shaft is installed in rotation on the frame, described milling cutter is installed in the main shaft lower end, workpiece to be processed is positioned at the below of described milling cutter, described workpiece to be processed comprises left side test specimen 11, middle test specimen 12 and the right test specimen 13, described workpiece to be processed comprises left side test specimen 11, middle test specimen 12 is different with the hardness of the right test specimen 13, described left side test specimen 11, middle test specimen 12 and the right test specimen 13 are fixed on the connecting plate 17, described connecting plate 17 is installed on the dynamometer 18, described dynamometer 18 is installed on the connecting plate base 19, described connecting plate base 19 is rigidly connected with high-frequency electrohydraulic vibration machine 6, described high-frequency electrohydraulic vibration machine 6 is by hydraulic oil source 25, hydraulic cylinder 24 occurs and consists of in high-speed electromagnetic valve 26 and vibration, and described vibration generation hydraulic cylinder 24 is fixed on the work stage 8 of numerical control machining center.Acceleration transducer 5 is installed in respectively on the lower surface of the upper surface of described workpiece to be processed 4 and described connecting plate base 19.Described acceleration transducer 5 is connected with data collecting card 9 by the 00C30 coaxial cable, described dynamometer 18 is connected with data collecting card 9 by charge amplifier, described data collecting card 9 be connected notebook computer 10 with the milling vibration signal and be connected in order to record the milling process Milling Force.
Many hardness spliced materials high frequency of present embodiment is the auxiliary milling testing arrangement of electric liquid vibration a little, comprise numerical control machining center, workpiece part 4, dynamometer 18, high-frequency electrohydraulic vibration machine 6, data collecting card 9 and notebook computer 10, the notebook computer of present embodiment is mobile workstation DELL M90;
Described workpiece part 4 comprises left side test specimen 11, middle test specimen 12 and the right test specimen 13, described left side test specimen 11, connect into an integral body with described hex nut 14 and described turret head articulation hole with bolt 15 between middle test specimen 12 and the right test specimen 13, described left side test specimen 11, middle test specimen 12 and the right test specimen 13 are installed on the described connecting plate 17, described connecting plate 17 lower panels have counter sink, described workpiece bottom surface has tapped blind hole, described hexagon socket cap head screw 16 is installed in order to fixing described connecting plate 17 and described left side test specimen 11 on the described counter sink, middle test specimen 12 and the right test specimen 13, described connecting plate 17 is installed on the described dynamometer 18, described connecting plate 17 top panels have counter sink, on the described dynamometer top panel tapped blind hole is arranged, described hexagon socket cap head screw 21 is installed in order to connect described connecting plate 17 and described dynamometer 18 on the described counter sink, on described dynamometer 18 bases counter sink is arranged, on the described connecting plate base 19 tapped blind hole is arranged, described socket head screw 20 is installed in order to be fixed on described dynamometer 18 and described connecting plate base 19 on the described counter sink, described connecting plate base 19 is installed in vibration and occurs on the hydraulic cylinder 24, on described vibration generation hydraulic cylinder 24 bases flange mounting hole is arranged, described hexagon-headed bolt 23 and hex-head nut 22 are installed in order to fixing described vibration generation hydraulic cylinder 24 and platen 8 on the described flange mounting hole.Hydraulic cylinder 24 occurs by hydraulic oil source 25, high-speed electromagnetic valve 26 and vibration and consists of in described high-frequency electrohydraulic vibration machine 6.Be provided with piston 27 in the described vibration generation hydraulic cylinder 24, one end of described piston rod 28 stretches out outside the cylinder body of described vibration machine hydraulic cylinder 24, the hydraulic fluid port A of upside inner chamber is communicated with pressure-oil tank in the described cylinder body, and the hydraulic fluid port B of piston underside inner chamber is communicated with the oil inlet and outlet PT of described high-speed electromagnetic valve 26 in the described cylinder body.
In the present invention, the described Sensor section 5 333B30 type acceleration transducer that is U.S. PCB company; Described sensor 5 is installed on the lower surface of described workpiece 4 upper surfaces and described connecting plate base 19; It is the 3-position 4-way solenoid directional control valve of 34D-10B that described high-speed electromagnetic valve 26 is selected model, and operating frequency is 1000Hz.
Described data collecting card model is LMS SCADAIII data collecting card;
LMS test.lab software is installed on the described mobile workstation.
The course of work of present embodiment is: at first described workpiece partly is installed in vibration and occurs on the hydraulic cylinder, according to apparatus of the present invention design vibration hydraulic cylinder connecting plate base occurs, this device is fixedly mounted on the Machinetool workpiece platform with bolt.Next, described acceleration transducer is fixed on the workpiece, described acceleration transducer is linked into data collecting card by the 00C30 coaxial cable, described dynamometer access charge amplifier is connected to the data collecting card front end with voltage amplification to 0-5V, described data collecting card is connected on the mobile workstation.Next step on apparatus of the present invention, installs milling cutter, and opening power according to the needs of milling process, is adjusted operating frequency, makes workpiece obtain the high frequency micro breadth oscillation along direction of feed.Then according to technological requirement, set cutting parameter, such as cutting speed, cutting depth, the amount of feeding etc., at described mobile workstation operation LMS test.lab software, commissioning device is demarcated described sensor.At last, input test routine on described high-speed machining center moves described high-speed machining center, analyzes data with described LMS test.lab software records.
The testing arrangement of present embodiment.It is a kind ofly to be made of numerical control machining center and high-frequency electrohydraulic generator, need to be with the vibration milling attachment that is used for metal cutting of high frequency electric source excitation.High frequency is the auxiliary Milling Process of electric liquid vibration a little, is a kind of in the additional extensional vibration that forces of workpiece to be processed, produces the metal milling method of special milling effect, and it is realized by the high-frequency electrohydraulic vibration machine.The high-frequency electrohydraulic vibration machine is made of hydraulic oil source, high-speed electromagnetic valve and vibration generation hydraulic cylinder.Hydraulic oil source is input to vibration with pressure oil through high-speed electromagnetic valve and occurs in the hydraulic cylinder, and pressure oil moves up and down at pushing piston under the high speed electromagnetic valve action, thereby produces dither.High-speed electromagnetic valve is the 3-position 4-way solenoid directional control valve, and spool can be realized the conversion of left position, meta, three positions, right position.During both sides electromagnet no powers, spool is in meta, and P, T, A, B are not connected, and reversal valve stops hydraulic cylinder occuring for pressure oil to vibration.When the electromagnet left end gets when electric, spool is pushed the right to, and pressure oil enters valve body from the P mouth, lead to vibration through the B mouth hydraulic cylinder occurs, and enter valve body from the fluid that hydraulic cylinder flows back to through the A mouth, and flow back to fuel tank by oil return inlet T, hydraulic cylinder occurs and moves upward under the effect of pressure oil in vibration; When the electromagnet right-hand member gets when electric, spool is pushed the left side to, and pressure oil leads to vibration through P, A mouth hydraulic cylinder occurs, and oil return is then flowed back to fuel tank through B, T mouth, and hydraulic cylinder counter motion under the pressure oil effect occurs in vibration.Valve port A and B and valve port P and T alternate conduction, oil cylinder piston will be done periodic the reciprocating motion and produce exciting, thereby workpiece to be machined obtains the high frequency micro breadth oscillation in direction of feed, obtain the effect of the auxiliary milling of vibration.Utilize high-frequency vibration generator, this device can reduce Milling Force effectively, overcome common milling in the excessive problem of edge joint position vibration, thereby obtain the not available characteristics of a series of common millings, as suppressing flutter, suppress burr, reduce heat in metal cutting and cutting temperature and improving machining accuracy etc.In addition, the cutting force situation when this device can record and analyze milling different hardness spliced materials in milling process in order to technological parameter rationally is set, is improved workpiece surface quality.
The described content of this specification embodiment only is enumerating the way of realization of inventive concept; protection scope of the present invention should not be regarded as only limiting to the concrete form that embodiment states, protection scope of the present invention also reaches in those skilled in the art conceives the equivalent technologies means that can expect according to the present invention.
Claims (1)
1. splicing mould steel high frequency micro breadth oscillation milling method of testing of hardening, on the milling feed direction, the splicing Hardened Steel Workpiece is applied frequency more than 1000Hz, amplitude 0.1 ~ 0.5 μ m, exciting force reaches more than the 200N, cutting force and cutting vibration when record and analysis vibration milling spliced materials.
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| CN2012104472017A CN103042435A (en) | 2012-11-09 | 2012-11-09 | High-frequency slight-amplitude vibration milling test method of splicing quenching hardening die steel |
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| CN2012104472017A CN103042435A (en) | 2012-11-09 | 2012-11-09 | High-frequency slight-amplitude vibration milling test method of splicing quenching hardening die steel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108637329A (en) * | 2018-04-17 | 2018-10-12 | 哈尔滨理工大学 | Splice hardened steel mold vibration auxiliary milling attachment and fuzzy control method |
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| EP0323518A1 (en) * | 1987-06-24 | 1989-07-12 | Research Development Corporation Of Japan | Device for vibrating work to be ground |
| CN1861274A (en) * | 2006-06-12 | 2006-11-15 | 江苏大学 | Composite activator used for vibration-cutting |
| US20070052326A1 (en) * | 2005-09-07 | 2007-03-08 | Matsushita Electric Industrial Co., Ltd. | Method and apparatus for vibration machining with two independent axes |
| CN201008976Y (en) * | 2007-03-15 | 2008-01-23 | 杭州电子科技大学 | Ultrasound wave torsional vibration vehicle milling system |
| CN101858373A (en) * | 2010-06-10 | 2010-10-13 | 浙江工业大学 | High-frequency electrohydraulic fluttering generator |
| WO2012084779A1 (en) * | 2010-12-21 | 2012-06-28 | Ev Group Gmbh | System having two oscillation components for machining a workpiece |
-
2012
- 2012-11-09 CN CN2012104472017A patent/CN103042435A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0323518A1 (en) * | 1987-06-24 | 1989-07-12 | Research Development Corporation Of Japan | Device for vibrating work to be ground |
| US20070052326A1 (en) * | 2005-09-07 | 2007-03-08 | Matsushita Electric Industrial Co., Ltd. | Method and apparatus for vibration machining with two independent axes |
| CN1861274A (en) * | 2006-06-12 | 2006-11-15 | 江苏大学 | Composite activator used for vibration-cutting |
| CN201008976Y (en) * | 2007-03-15 | 2008-01-23 | 杭州电子科技大学 | Ultrasound wave torsional vibration vehicle milling system |
| CN101858373A (en) * | 2010-06-10 | 2010-10-13 | 浙江工业大学 | High-frequency electrohydraulic fluttering generator |
| WO2012084779A1 (en) * | 2010-12-21 | 2012-06-28 | Ev Group Gmbh | System having two oscillation components for machining a workpiece |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108637329A (en) * | 2018-04-17 | 2018-10-12 | 哈尔滨理工大学 | Splice hardened steel mold vibration auxiliary milling attachment and fuzzy control method |
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Application publication date: 20130417 |