CN102922014A - Ultrasonic torsional vibration side milling method in combination with stretching clamping - Google Patents
Ultrasonic torsional vibration side milling method in combination with stretching clamping Download PDFInfo
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- CN102922014A CN102922014A CN2012104142958A CN201210414295A CN102922014A CN 102922014 A CN102922014 A CN 102922014A CN 2012104142958 A CN2012104142958 A CN 2012104142958A CN 201210414295 A CN201210414295 A CN 201210414295A CN 102922014 A CN102922014 A CN 102922014A
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Abstract
The invention discloses an ultrasonic torsional vibration side milling method in combination with stretching clamping. The ultrasonic torsional vibration side milling method specifically comprises the following operation steps of: 1, selecting a milling tool according to the property of a work material and an accuracy requirement; 2, calculating corresponding prestress aiming at the work workpiece material, mounting a workpiece on a clamp with adjustable stretching force to guarantee that the prestress direction is parallel to the workpiece feeding direction and then adjusting the prestress of a surface to be machined of the workpiece to a calculated value; 3, starting a machine tool and an ultrasonic generator, keeping torsional vibration frequency at 20 kHz and amplitude of a cutter at 10 microns, and adjusting the using amount of milling according to the required technological parameter; 4, feeding the workpiece along with a working table, performing ultrasonic torsional vibration while rotating the milling cutter until the material to be removed is machined; 5, retracting the cutter, closing the ultrasonic generator and the machine tool, cooling and then unloading the workpiece; and 6, if continuously machining the workpiece, repeating the steps 1 to 5. According to the ultrasonic torsional vibration side milling method in combination with stretching clamping, the residual stress of a machining surface can be improved so as to further improve the fatigue strength of the workpiece, the cutting force and the cutting temperature can also be obviously reduced, the life of the cutter is prolonged, and the like.
Description
Technical field: the present invention relates to a kind of cutting process, especially a kind of ultrasonic torsional oscillation side milling method in conjunction with stretched fixation belongs to the Machining Technology field.
Background technology: along with the development of Aero-Space, national defense industry, modern medicine and biotechnology, increasing high performance material is used, yet these materials often are difficult-to-machine material, and therefore traditional machining process has been difficult to satisfy processing request need seek new processing method.For the methods such as UVC have appearred in processing request that cater to raising, ultrasonic torsional oscillation milling refers to the workpiece course feed and has the twisting vibration of high frequency when the normal rotation of milling cutter.Though this processing method can obviously reduce cutting force and cutting temperature also can improve surface quality prolongation cutter life, is nowhere near for those improvement dynamics of bearing workpiece the method for high load capacity pulsating stress.Milling in the simple stretched fixation situation refers to apply in a suitable stress and the process to workpiece in advance keep this prestressing force until machine always.Though this processing method can be improved the residual stress of machined surface, but can not overcome the problems such as cutting force is large, cutting temperature is high, machining accuracy is low, flow harden is serious.Therefore, also there is not a kind of efficient, high-quality, low-cost method for milling for the wallboard class workpiece as difficult-to-machine materials such as titanium alloys.
Summary of the invention: for above-mentioned the deficiencies in the prior art, the invention provides a kind of a kind of efficient, high-quality, low-cost method for milling of the wallboard class workpiece for difficult-to-machine material.
For achieving the above object, the technical solution used in the present invention is: a kind of ultrasonic torsional oscillation side milling method in conjunction with stretched fixation, and concrete operation step is as follows:
One, selects milling cutter according to rapidoprint attribute and required precision.
Two, calculate corresponding prestressing force (be generally material yield stress 20% ~ 50%) for the processing work material, workpiece is installed on the anchor clamps of adjustable tensile force, then the assurance prestress square regulates the prestressing force of workpiece work surface to calculated value to parallel with the workpiece direction of feed.
Three, start lathe and supersonic generator, make torsion frequency be not less than 20kHz, 10 microns of cutter amplitudes according to required technological parameter, are regulated milling usage.
Four, workpiece carries out ultrasonic torsional oscillation with table feed in the time of the milling cutter rotation, until process the material that needs removal.
Five, withdrawing cuts out supersonic generator and lathe, cools off then discharging workpieces.
If six continue processing work, repeated for one ~ five step.
Ultrasonic torsional oscillation side milling method under the stretched fixation prerequisite of the present invention can be improved the residual stress of machined surface and then improve the fatigue strength of workpiece, can also obviously reduce cutting force, cutting temperature, prolongation cutter life etc., the method can be processed the wallboard class workpiece as difficult-to-machine materials such as titanium alloys efficient, high-quality, cheaply.The present invention not merely is the stack of milling and ultrasonic torsional oscillation method for milling in the stretched fixation situation, requires here to be necessary for side milling, because ultrasonic vibration direction, workpiece direction of feed, the pre-tensile stress direction of contact portion is substantially parallel during side milling.Use the method well to melt the advantage of these two kinds of milling modes mutually satisfying under the application conditions.
Description of drawings:
Fig. 1 is fundamental diagram of the present invention.
Fig. 2 is workpiece and cutter top view.
Among the figure: the 1-workpiece, 2-helical end mills, 3-provide the anchor clamps of stretched fixation, 4-workbench, the ultrasonic torsional oscillation handle of a knife of 5-, 6-CNC milling machine main shaft, 7-supersonic generator
The specific embodiment:
As depicted in figs. 1 and 2, device required for the present invention by workpiece 1, helical end mills 2, with ultrasonic torsional oscillation handle of a knife 5 CNC milling machine, supersonic generator 7 and can provide the anchor clamps 3 of stretched fixation to form.6 is the CNC milling machine main shaft among the figure, A be workpiece lasting prestress square to, B is the direction of feed of workpiece, C is the milling cutter direction of rotation, D is the ultrasonic torsional oscillation direction of milling cutter.The different rapidoprint of the selective basis of milling cutter is selected, such as machining titanium alloy, and optional YG8; Unimach, optional YT15; Superhard material must be CBN or diamond tool.Helical end mills 2 be fixed on the ultrasonic torsional oscillation handle of a knife 5 and CNC milling machine main shaft 6 on, supersonic generator 7 is connected with ultrasonic torsional oscillation handle of a knife 5.
Use the method machining titanium alloy TC4 step as follows: 1. to select the YG8 helical end mills according to processing request.2. corresponding prestressing force 246Mpa(is generally 20% ~ 50% of material yield stress for TC4 calculates for processing work 1, yield stress 820Mpa at this TC4), workpiece 1 is installed on the anchor clamps 3 of adjustable tensile force, makes prestress square then regulate the prestressing force of workpiece work surface to 260Mpa to parallel with the workpiece direction of feed.3. start lathe and supersonic generator 7, regulate milling usage and ultrasonic torsional oscillation parameter (cutting speed 40m/min, axial cutting-in 3mm, the wide 0.3mm of radial cut, feed engagement 0.05mm, ultrasonic torsion frequency 20kHz, amplitude 0.01mm) according to technological requirement.4. workpiece 1 is with workbench 4 feedings, and helical end mills 2 is rotated in ultrasonic torsional oscillation, until finish the material that needs removal.5. withdrawing cuts out supersonic generator 7 and lathe, cools off then discharging workpieces 1.If 6. continue processing work, repeat 1. ~ 5. go on foot.
Claims (2)
1. ultrasonic torsional oscillation side milling method in conjunction with stretched fixation, concrete operation step is as follows:
(1) selects milling cutter according to rapidoprint attribute and required precision;
(2) calculate corresponding prestressing force for the processing work material, workpiece is installed on the anchor clamps of adjustable tensile force, then the assurance prestress square regulates the prestressing force of workpiece work surface to calculated value to parallel with the workpiece direction of feed.
(3) start lathe and supersonic generator, making torsion frequency is 20kHz, and 10 microns of cutter amplitudes according to required technological parameter, are regulated milling usage.
(4) workpiece carries out ultrasonic torsional oscillation with table feed in the time of the milling cutter rotation, until process the material that needs removal.
(5) withdrawing cuts out supersonic generator and lathe, cools off then discharging workpieces.
(6) if continue processing work, repeat (1) ~ (5) step.
2. a kind of ultrasonic torsional oscillation side milling method in conjunction with stretched fixation as claimed in claim 1, it is characterized in that: the described prestressing force of step (2) is 20% ~ 50% of material yield stress.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210414295.8A CN102922014B (en) | 2012-10-25 | 2012-10-25 | Ultrasonic torsional vibration side milling method in combination with stretching clamping |
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| CN201210414295.8A CN102922014B (en) | 2012-10-25 | 2012-10-25 | Ultrasonic torsional vibration side milling method in combination with stretching clamping |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103659211A (en) * | 2013-12-20 | 2014-03-26 | 上海现代先进超精密制造中心有限公司 | Method for machining silicon carbide blade |
| CN103737082A (en) * | 2013-12-20 | 2014-04-23 | 柳州正菱集团有限公司 | Technique for roughly milling two cylindrical end surfaces for automobile load rear plate spring hanging ring |
| CN104646739A (en) * | 2015-03-05 | 2015-05-27 | 中南大学 | Aluminum alloy side milling process under assistance of ultrasonic longitudinal vibration |
| CN107775064A (en) * | 2017-09-28 | 2018-03-09 | 南昌大学 | A kind of lateral method for milling of single-blade based on torsional ultrasonic |
| CN111618665A (en) * | 2020-05-19 | 2020-09-04 | 南方科技大学 | High-efficiency low-damage processing method and processing device |
| CN111736529A (en) * | 2020-06-11 | 2020-10-02 | 南京理工大学 | Method for improving cutting angle of carbon fiber reinforced composite material fiber based on ultrasonic milling |
| CN112620744A (en) * | 2020-12-10 | 2021-04-09 | 西北工业大学 | Difficult-to-process composite material TiB2Ultrasonic vibration assisted milling method for/7050 Al |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103659211A (en) * | 2013-12-20 | 2014-03-26 | 上海现代先进超精密制造中心有限公司 | Method for machining silicon carbide blade |
| CN103737082A (en) * | 2013-12-20 | 2014-04-23 | 柳州正菱集团有限公司 | Technique for roughly milling two cylindrical end surfaces for automobile load rear plate spring hanging ring |
| CN103659211B (en) * | 2013-12-20 | 2016-04-06 | 上海现代先进超精密制造中心有限公司 | A kind of method of processing silicon carbide blade |
| CN104646739A (en) * | 2015-03-05 | 2015-05-27 | 中南大学 | Aluminum alloy side milling process under assistance of ultrasonic longitudinal vibration |
| CN107775064A (en) * | 2017-09-28 | 2018-03-09 | 南昌大学 | A kind of lateral method for milling of single-blade based on torsional ultrasonic |
| CN107775064B (en) * | 2017-09-28 | 2019-02-26 | 南昌大学 | A kind of lateral method for milling of single-blade based on torsional ultrasonic |
| CN111618665A (en) * | 2020-05-19 | 2020-09-04 | 南方科技大学 | High-efficiency low-damage processing method and processing device |
| WO2021232735A1 (en) * | 2020-05-19 | 2021-11-25 | 南方科技大学 | Machining method and machining device having high efficiency and low damage |
| CN111736529A (en) * | 2020-06-11 | 2020-10-02 | 南京理工大学 | Method for improving cutting angle of carbon fiber reinforced composite material fiber based on ultrasonic milling |
| CN112620744A (en) * | 2020-12-10 | 2021-04-09 | 西北工业大学 | Difficult-to-process composite material TiB2Ultrasonic vibration assisted milling method for/7050 Al |
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