SU942894A1

SU942894A1 - Apparatus for clamping blanks

Info

Publication number: SU942894A1
Application number: SU803215810A
Authority: SU
Inventors: Юрий Николаевич Кузнецов; Иван Алексеевич Иванюк; Владимир Васильевич Онищенко
Original assignee: Киевский Ордена Ленина Политехнический Институт Им.50-Летия Великой Октябрьской Социалистической Революции
Priority date: 1980-12-15
Filing date: 1980-12-15
Publication date: 1982-07-15

Description

Изобретение относится к металлообработке и может быть использовано для зажима заготовок в токарных автоматах.The invention relates to metalworking and can be used to clamp blanks in automatic lathes.

Известно устройство для зажима заготовок, содержащее корпус, шпиндель ⁵на опорах, гидроцилиндр зажима, связанный цепью обратной связи с датчиком [1 ].A device for clamping workpieces is known, comprising a housing, a spindle ⁵ on supports, a clamping cylinder connected by a feedback circuit to a sensor [1].

Однако при таком исполнении ₎₀ низка точность обработки заготовок из-за отжима ее силами резания.However, with this design _{) 0 the} accuracy of the workpiece processing is low due to its pressing by cutting forces.

Цель изобретения'- повышение точности обработки.The purpose of the invention'-improving the accuracy of processing.

Поставленная цель достигается тем,₎₅что устройство снабжено кольцом с упругими стенками, в котором расположен датчик, предназначенный для измерения упругих сжатий одной из опор шпинделя, причем кольцо установлено го между корпусом и этой опорой.This goal is achieved by:) ₅ that the device is equipped with a ring with elastic walls, in which a sensor is located, designed to measure the elastic compressions of one of the spindle bearings, and the ring is installed between the housing and this support.

На фиг. 1 представлено устройство, общий вид; на фиг. 2 - сечение А-А на фиг. 1.In FIG. 1 shows a device, a General view; in FIG. 2 is a section AA in FIG. 1.

Устройство для зажима заготовок состоит из шпинделя 1 на опорах 2 и 3, гидроцилиндра 4 зажима, питаемого от насосной установки через гидропанель управления. Поршень 5 гидроцилиндра 4 при помощи штока 6 связан с цангой 7· В одной из опор 2 шпинде ля 1, например в передней, в упругом кольце 8 расположен датчик 9» предназначенный для измерения упругих отжатий опоры 2, пропорциональных длине вылета заготовки 10. Датчик 9 связан цепью обратной связи через усилитель 11, напорный золотник 12 с гидроцилиндром 4.The device for clamping workpieces consists of a spindle 1 on supports 2 and 3, a hydraulic cylinder 4 of the clamp, fed from the pumping unit through the control panel. The piston 5 of the hydraulic cylinder 4 is connected to the collet 7 by a rod 6 · In one of the supports 2 of the spindle 1, for example, in the front, in the elastic ring 8 there is a sensor 9 ”used to measure the elastic depressions of the support 2 proportional to the length of the workpiece 10. Sensor 9 connected by a feedback circuit through an amplifier 11, a pressure spool 12 with a hydraulic cylinder 4.

При обработке заготовки 10'под действием силы резания появляются упругие отжатия в опоре 2. Датчик 9.измеряет это отжатие и через усилитель 11 выдает управляющий сигнал на напорный золотник 12, регулирующий давление в гидроцилиндре 4. Поршень 5 гидроцилиндра 4, связанный с цангой 7, перемещает ее, изменяя осевое и радиальное усилие зажима заготовки 10, что в свою очередь уменьшает упругое отжатие заготов ки 10 под действием сил резания.When processing the workpiece 10, under the action of the cutting force, elastic squeezes appear in the support 2. The sensor 9. measures this squeeze and, through the amplifier 11, provides a control signal to the pressure spool 12, which regulates the pressure in the hydraulic cylinder 4. The piston 5 of the hydraulic cylinder 4, connected to the collet 7, moves it, changing the axial and radial clamping force of the workpiece 10, which in turn reduces the elastic squeezing of the workpiece 10 under the action of cutting forces.

Экономическая эффективность предлагаемого устройства для зажима заготовок обусловлена тем, что при автоматическом регулировании силы зажима повышается точность обработки вследст вие уменьшения колебаний заготовки при обработке.The economic efficiency of the proposed device for clamping workpieces is due to the fact that automatic control of the clamping force increases the accuracy of processing due to the reduction of fluctuations in the workpiece during processing.

942894 4 рах, гидроцилиндр зажима, связанный цепью обратной связи с датчиком, о тличающееся тем, что, с целью повышения точности обработки, устрой5 ство снабжено кольцом с упругими стенками, в котором расположен датчик, предназначенный для измерения упругих отжатий одной из опор шпинделя, причем кольцо установлено между корпусом 10 и этой опорой.942894 4 axes, a clamping cylinder connected by a feedback circuit with a sensor, characterized in that, in order to increase the accuracy of processing, the device is equipped with a ring with elastic walls, in which a sensor is located, designed to measure the elastic squeezes of one of the spindle bearings, moreover a ring is installed between the housing 10 and this support.

Источники информации,Sources of information,

Claims

The invention relates to metal working and can be used to clamp workpieces in automatic lathes. A device for clamping a cooker is known, comprising a housing, a spindle on the supports, a clamping hydraulic cylinder connected by a feedback circuit to the sensor p. However, with such a design, the machining accuracy of the workpieces is low because of its pressing by cutting forces. The purpose of the invention is to improve the accuracy of processing. This goal is achieved by the fact that the device is equipped with a ring with elastic walls, in which the sensor is located, designed to measure the compression of one of the spindle supports — the ring is installed between the housing and this support. FIG. 1 shows the device a general view; FIG. 2 is a section A-A in FIG. 1. A device for clamping blanks consists of a spindle 1 on supports 2 and 3, a clamp hydraulic cylinder k, fed from a pump unit through a control hydropanel. The piston 5 of the hydraulic cylinder is connected to the collet 7 by means of the rod 6. In one of the supports 2 of the spindle 1, for example, a sensor 9 is located in the elastic ring 8 for measuring the elastic squeezing of the support 2 proportional to the departure length of the workpiece 10. The sensor 9 is connected by a chain feedback through amplifier 11; pressure spool 12 with hydraulic cylinder. When machining the workpiece 10 under the action of cutting force, elastic squeezing appears in the support

2. Sensor 9. measures this release and, through amplifier 11, outputs a control signal to a pressure valve 12, which regulates the pressure in the hydraulic cylinder. The hydraulic cylinder piston 5 associated with the collet 7 moves it by changing the axial and radial clamping force of the workpiece 10, which in turn reduces the elastic release of the workpiece 10 under the action of cutting forces. The economic efficiency of the proposed device for clamping blanks is due to the fact that with automatic adjustment of the clamping force, the machining accuracy is improved due to the reduction of the workpiece oscillations during machining. Claim device for clamping workpieces comprising a housing, a spindle on an opax, a clamping cylinder connected to a feedback circuit with a sensor, in that, in order to improve machining accuracy, the device is provided with a ring with elastic walls in which the sensor is located designed to measure the elastic release of one of the spindle supports, with a ring mounted between the housing and this support. Sources of information taken into account in the examination 1. USSR author's certificate 709252, cl. B 23 B 13/00, 1978.