RU2014140270A

RU2014140270A - Method for magnetorheological surface treatment of optical parts with a small tool

Info

Publication number: RU2014140270A
Application number: RU2014140270A
Authority: RU
Inventors: Владимир Алексеевич Горшков; Артем Сергеевич Невров; Александр Николаевич Куделин
Original assignee: Акционерное общество "Научно-производственное объединение "Оптика" ( АО "НПО "Оптика")
Priority date: 2014-10-06
Filing date: 2014-10-06
Publication date: 2016-04-20
Also published as: RU2592337C2

Abstract

1. Способ магнитореологической обработки поверхностей оптических деталей малым инструментом, при котором предварительно обработанную заготовку обмеривают, на основании данных измерений составляя программу обработки, весь процесс обработки разбивают на несколько последовательных технологических сеансов с корректировкой на каждый сеанс программы обработки после получения результатов контроля предыдущего сеанса, обрабатываемую деталь приводят во вращение вокруг своей оси, в зону обработки попеременно подают под давлением и отводят магнитореологическую жидкость, а обработку ведут инструментом, формируемым в виде сгустка магнитореологической жидкости, находящейся в зоне обработки и переведенной в вязкопластическое состояние под действием накладываемого нее в зоне обработки магнитного поля, отличающийся тем, что в ходе каждого технологического сеанса обработки производят чередование периодов наложения магнитного поля и периодов его снятия, причем в процессе обработки на поверхность обрабатываемой детали воздействуют торцевой поверхностью инструмента, представляющего образующий площадное пятно контакта своей торцевой поверхности с поверхностью обрабатываемой детали сгусток магнитореологической жидкости, заключенный в ограниченной по объему внутренней полости в корпусе инструмента.2. Способ по п. 1, отличающийся тем, что на зону обработки воздействуют прерывистыми импульсами постоянного магнитного поля.3. Способ по п. 2, отличающийся тем, что чередование периодов наложения магнитного поля и периодов его снятия производят посредством включения и выключения питания рабочим током обмоток электромаг1. The method of magnetorheological treatment of surfaces of optical parts with a small tool, in which a pre-processed workpiece is measured, based on the measurement data by compiling a processing program, the entire processing process is divided into several consecutive technological sessions, adjusted for each session of the processing program after receiving the results of the control of the previous session, processed the part is brought into rotation around its axis, they are alternately fed into the processing zone under pressure and removed magnetorheological fluid, and the treatment is carried out by a tool formed in the form of a bunch of magnetorheological fluid located in the treatment zone and converted into a viscoplastic state under the action of a magnetic field applied to it in the treatment zone, characterized in that during each processing session the magnetic fields are alternated and periods of its removal, moreover, during processing, the end surface of the tool is exposed to the surface of the workpiece, a clot of magnetorheological fluid forming a areal spot of contact of its end surface with the surface of the workpiece; it is enclosed in a limited-volume internal cavity in the tool body. 2. The method according to claim 1, characterized in that the processing zone is affected by intermittent pulses of a constant magnetic field. The method according to claim 2, characterized in that the alternation of periods of application of the magnetic field and periods of its removal is carried out by turning the power on and off with the operating current of the electromagnet windings

Claims

1. The method of magnetorheological treatment of surfaces of optical parts with a small tool, in which a pre-processed workpiece is measured, based on the measurement data by compiling a processing program, the entire processing process is divided into several consecutive technological sessions, adjusted for each session of the processing program after receiving the results of the control of the previous session, processed the part is brought into rotation around its axis, they are alternately fed into the processing zone under pressure and removed magnetorheological fluid, and the treatment is carried out by a tool formed in the form of a bunch of magnetorheological fluid located in the treatment zone and converted into a viscoplastic state under the action of a magnetic field applied to it in the treatment zone, characterized in that during each processing session the magnetic fields are alternated and periods of its removal, moreover, during processing, the end surface of the tool is exposed to the surface of the workpiece, A clot of magnetorheological liquid forming an area spot of contact between its end surface and the surface of the workpiece is enclosed in a limited-volume internal cavity in the tool body.

2. The method according to p. 1, characterized in that the treatment area is affected by intermittent pulses of a constant magnetic field.

3. The method according to p. 2, characterized in that the alternation of the periods of application of the magnetic field and the periods of its removal is carried out by turning the power on and off with the operating current of the windings of the DC electromagnet.

4. The method according to p. 1, characterized in that the small tool is placed above the workpiece.

5. The method according to p. 1, characterized in that the tool is informed during processing plane-parallel movement relative to the surface to be treated.

6. The method according to p. 1, characterized in that during the processing process, the working gap in the processing zone between the workpiece surface to be machined and the tool face is monitored and maintained constant.